36076036 rnc glossary
TRANSCRIPT
AAAL2
See ATM Adaptation Layer type 2
AC
See Alternating Current
Access Link Control Application Part
Access Link Control Application Part is a generic name for the transport signalling protocol used to setup and tear down transport bearers. In UMTS the main ALCAP protocol is the AAL2 signalling protocol.
ACK
See Acknowledgement
Acknowledged Mode
An RRC connected mode where neither DCCH nor DTCH is available.
Acknowledgement
A Layer 2 response by the mobile station or the base station confirming that a signaling message was received correctly.
Acquisition Indicator Channel
The Acquisition Indicator Channel is a fixed rate physical channel with a spreading factor of 256 equating to 32Kbps. It is used to carry acquisition indicators which correspond to signatures on the PRACH (Physical Random Access Channel).
Active factor
Active factor reflects the actual usage of bandwidth. For example, if the active factor is 50, it indicates that the actual usage of bandwidth is 50%.
Active process
HARQ process to which scheduling grants are applicable, that is, in which scheduled data can be sent.
Adaptive Modulation and Coding
The UE sends CQI through the HS-DPCCH to the NodeB to report the channel quality. The NodeB decides the size of the transport blocks and modulation mode according to the CQI.
When the UE is in good radio environment, the transmission can adopt the high order 16QAM modulation mode and large transport blocks to achieve high peak rate.
When the UE is in poor radio environment, the transmission can adopt low order QPSK modulation mode and small transport blocks to ensure communication quality.
ADSL
See Asymmetrical Digital Subscriber Line
AEUa
RNC 32-port ATM over E1/T1/J1 interface Unit REV:a
AF
See Assured Forwarding
AFC
See Automatic Frequency Control
AG
Absolute Grant
AGPS
See Network Assisted GPS
AICH
See Acquisition Indicator Channel
AKA
Authentication and Key Agreement
ALCAP
See Access Link Control Application Part
Allocation Retention Priority
It is a QoS attribute that specifies the relative importance compared to other UMTS bearers for allocation and retention of the UMTS bearer.
Alternating Current
Current which constantly changes in amplitude, and which reverses direction at regular intervals.
AM
See Acknowledged Mode
AMC
See Adaptive Modulation and Coding
American Standard Code for Information Interchange
American Standard Code for Information Interchange - the standard system for representing letters and symbols. Each letter or symbol is assigned a unique number between 0 and 127.
AMR
Adaptive Multi Rate
AMRC
Adaptive Multi-Rate Control algorithm
ANI
Adjacent Node Identifier
AOA
Angular Of Arrival
AOUa
RNC 2-port ATM over channelized Optical STM-1/OC-3 Interface Unit REV:a
ARP
See Allocation Retention Priority
ARPU
See Average Revenue Per User
ASCII
See American Standard Code for Information Interchange
Assured Forwarding
A QoS (Quality of Service) term employed within the DiffServ (Differentiated Services) policy. Assured Forwarding values are set as part of the PHB (Per Hop Behaviour) used by routers. This value is used to
determine the degree of reliability a packet should be afforded within the DiffServ domain.
Asymmetrical Digital Subscriber Line
A technology that allows more data to be sent over existing copper telephone lines (POTS (Plain Old Telephone Service)). ADSL supports data rates of from 1.5Mbps to 9Mbps when receiving data (known as the downstream rate) and from 16Kbps to 640Kbps when sending data (known as the upstream rate). ADSL requires a special modem.
ATM Adaptation Layer type 2
AAL2 supports continuous bit rate transmissions, but also solves the problems of packetization delay and efficiency in the use of bandwidth resources.
Authentication Token
The Authentication Token is sent in the Authentication Request message to the mobile along with a random number and KSI (Key Set Identifier). The variables within the AUTN are used by the mobile in the authentication process that it conducts with the network.
Authentication vector
The UMTS authentication vector uses a quintet of parameters which provides temporary authentication data that enables an VLR or SGSN to engage in UMTS authentication with a particular user.
AUTN
See Authentication Token
Automatic Frequency Control
A device or circuit that maintains the frequency of an oscillator within the specified limits with respect to a reference frequency.
Average Revenue Per User
This term is used by telephone carriers. This term has also become widely used in other industries including consumer Internet services. It is the revenue generated by a customer phone, pager, etc., per month. In mobile telephony, ARPU includes not only the revenues billed to the customer each month for usage, but also the revenue generated from incoming calls, payable within the regulatory interconnection regime.
B
Back Administration Module
Back Administrator Module of the RNC. It is a logical concept. In the OM subsystem, it works as a bridge between the Local Maintenance Terminal (LMT) and the Front Administration Module (FAM).
BAM
See Back Administration Module
Base Station Controller
The BSC is the functional entity within the GSM architecture that is responsible for RR (Radio Resource) allocation to a MS (Mobile Station), frequency administration and handover between BTS (Base Transceiver Station) controlled by the BSC. The BSC function may be physically located with the BTS. If this is the case there is no requirement for the Abis interface, and a preparatory interface to map signalling and traffic destined for the MS may be employed.
Base Station System
In GSM the Base Station System is a term given to a BSC (Base Station Controller) and the BTS (Base Transceiver Station) associated with it. The number of BTS associated with a BSC is dependent on the manufacturer. Although not mandatory, through interpretation of the Abis interface standard BTS and BSC employed within a BSS will always be supplied by the same manufacturer. The BSS is the physical equipment used to give radio coverage to a determined geographical zone called a cell. Functionally, a BSS is subdivided into BSC and BTS
Base Transceiver Station
In cellular system the Base Transceiver Station terminates the radio interface. Each BTS may consist of a number of TRX (Transceiver), typically between 1 and 16. In the GSM system the BTS is also responsible for ciphering of the air interface.
Basic telecommunication service
This term is used as a common reference to both bearer services and teleservices.
BER
See Bit Error Rate
Best effort service
A service model which provides minimal performance guarantees, allowing an unspecified variance in the measured performance criteria.
BFD
Bidirectional Forwarding Detection
Bit Error Rate
The number of erroneous bits received divided by the total number of bits transmitted.
BITS
See Building Integrated Timing Supply System
BLER
See Block Error Rate
Block Error Rate
BLER, or Block Error Rate, is the number of data blocks per second that contain detectable errors at the input of the C1 decoder.
BMC
See Broadcast/Multicast Control
BOOTP
See Bootstrap Protocol
BootROM
A writable and erasable storage medium for binary data (machine code). The BootROM software refers to the software bound with hardware. It provides basic device drive function and can be started and updated manually.
Bootstrap Protocol
Bootstrap Protocol is a TCP/IP protocol that enables a network device to discover certain startup information, such as its IP address.
BOSS
Business Operation Support System
Broadcast/Multicast Control
In the UMTS system, this protocol adapts broadcast and multicast services on the radio interface.
BSC
See Base Station Controller
BSC6800
One of Huawei RNC model
BSC6810
One of Huawei RNC model
BSS
See Base Station System
BTS
See Base Transceiver Station
Building Integrated Timing Supply System
In the situation of multiple synchronous nodes or communication devices, one can use a device to set up a clock system on the hinge of telecom network to connect the synchronous network as a whole, and provide satisfactory synchronous base signals to the building integrated device. This device is called BITS.
CC-RNTI
See Cell RNTI
CA
Call Agent
CAC
Call Admission Control
CAPEX
See Capital Expenditure
Capital Expenditure
Money spent to acquire or upgrade physical assets such as buildings and machinery.
Cascading
In a cascading connection, the output of one entity is considered as the input of its next entity.
Cascading in this chapter refers to the topology type (chain and tree) of NodeBs.
CBC
See Cell Broadcast Center
CBE
Cell Broadcast Entity
CBR
See Constant Bit Rate
CBS
See Cell Broadcast Service
CBS SA
A CBS SA is an area where the CBS service is available.
Cells have a one-to-one relationship with CBS SAs.
CCCH
Common Control Channel
CCP
Communication Control Port
CCTrCH
Coded Composite Transport Channel
CDMA
See Code Division Multiple Access
CDT tracing
The CDT tracing (detailed call tracing) is used to trace the following messages: standard interface messages of the UE and messages on the user plane and signaling plane of the UE.
Cell
Radio network object that can be uniquely identified by a User Equipment from a (cell) identification that is broadcasted over a geographical area from one UTRAN Access Point. A Cell is either FDD or TDD mode.
Cell breathing
Cell breathing refers to the phenomenon that the coverage of the cell varies with the number of users. That is, when the number of users increases, the network load also increases, the coverage of the cell, however, decreases; when the number of users decreases, the network load also decreases, the coverage of the cell, however, increases.
Cell Broadcast Center
The Cell Broadcast Centre is the functional entity within the mobile network that is responsible for the generation of cell broadcast information.
Cell Broadcast Service
Cell Broadcast is designed for simultaneous delivery of messages to multiple users in a specified area. Whereas the Short Message Service (SMS) is a one-to-one and one-to-a-few service, Cell Broadcast is one-to-many geographically focused service. It enables messages to be communicated to multiple mobile phone customers who are located within a given part of its network coverage area at the time the message is broadcast. Cell Broadcast is more akin to other mass distribution media such as teletext or Radio Data System (RDS). On Cell Broadcast the GSM operators send different news or data. Often they offer business news, weather forcast and so on.
Cell channel
The number of the program channel in a cell.
The relation between the cell channels and the program channels is configurable through commands.
Cell Multimedia Broadcast Channel
The CMB bearer on cells, corresponding to the FACH of SCCPCH. It bears different program channels through configurations.
Cell RNTI
Group RNTI. A newly defined type of UE ID, used in MAC header to identify data on CMBCHs.
Cell tracing
The cell tracing is used to measure the following two types of messages: common signaling messages on the Iub interface of one or more specified cells and customized messages that contain information about UEs in the cells.
CELL_DCH
An RRC connected mode in which DCCH and, if configured, DTCH are available. DCCH and DTCH are mapped to DCH.
CELL_PCH
An RRC connected mode where neither DCCH nor DTCH is available.
Center Processing Unit
The CPU is the brains of the computer. Sometimes referred to simply as the processor or central processor, the CPU is where most calculations take place.
CES
See Circuit Emulation Service
CG
See Charging Gateway
Charging Gateway
Element with a GPRS network that consolidates,filters and optimizes CDR (Call Detail Record) prior to their transmission to the Billing Platform.
CID
See Context identifier
Cipher Key
The Ciphering Key is a variable used in the GSM and GPRS cipher process.
Circuit Emulation Service
A function with which the E1/T1 data can be transmitted through ATM networks. At the transmission end, the interface module packs timeslot data into ATM cells. These ATM cells are sent to the reception end through the ATM network. At the reception end, the interface module re-assigns the data in these ATM cells to E1/T1 timeslots. The CES technology guarantees that the data in E1/T1 timeslots can be recovered to the original sequence at the reception end.
CK
See Cipher Key
CKSN
Cipher Key Sequence Number
CLD
Closed Loop Transmit Diversity
CLD1
Closed Loop Transmit Diversity Mode 1
CM
See Compressed mode
CMB
Cell Multimedia Broadcast
CMBCH
See Cell Multimedia Broadcast Channel
CmCH-PI
Common Transport Channel Priority Indicator
CME
Configuration Management Express
CN
See Core Network
Code Division Multiple Access
A technique for spread-spectrum multiple-access digital communications that creates channels through the use of unique code sequences.
command script
A command script is a text file. It records a batch of MML commands for a single NE or multiple NEs of the same type. You can execute multiple MML commands by executing a command script.
Common Object Request Broker Architecture
CORBA is the acronym for Common Object Request Broker Architecture, OMG's open, vendor-independent architecture and infrastructure that computer applications use to work together over networks.
Common Traffic Channel
This is a point to multipoint unidirectional channel for the transfer of dedicated user information for all or a group of specified UE (User Equipment).
Compress
The act of reducing the size of a header by removing header fields or reducing the size of header fields.
This is done in such a way that a decompressor can re-form the header if its context state is identical to the context state used in compression of the header.
Compressed mode
In the compressed mode, some timeslots in one or more continuous physical frames do not send data. This mode applies to inter-frequency measurement.
Configuration forward
After the configuration rollback is executed, the configuration forward function can also be performed to forward the configured data to a specified status.
Configuration right
Configuration rollback requires that only one user has the configuration right at present. That user can perform data configuration and configuration rollback.
Configuration rollback
When the expected result cannot be achieved with the MML commands executed, the configuration rollback function is performed to roll back the configured data to the specified status.
Constant Bit Rate
Constant Bit Rate is a service offered by a network technology such as ATM (Asynchronous Transfer Mode). This is used for real time services such as speech.
Context
A bit string that the compressor uses to compress a header and the decompressor uses to decompress a header.
It is the uncompressed version of the last header that the compressor sends or the decompressor receives over the link. The context for a packet stream is associated with a CID. In addition, the context for a non-TCP packet stream is associated with a generation.
Context identifier
A small unique number that identifies the context used to decompress a compressed header.
CIDs are carried in full headers or compressed headers.
Controlling Radio Network Controller
The RNC connected to a NodeB is called the CRNC of this NodeB.
CORBA
See Common Object Request Broker Architecture
Core Network
An architectural term relating to the part of UMTS which is independent of the connection technology of the terminal (eg radio, wired).
CORRM
Connection-Oriented Radio Resource Management
CPICH
Common Pilot Channel
CPU
See Center Processing Unit
CQI
Channel Quality Indicator
CRNC
See Controlling Radio Network Controller
CS
Circuit Switched
CTCH
See Common Traffic Channel
DDA
Data Agent
DAC
Digit-Analog Converter
Data integrity
The quality of correctness, completeness, wholeness, soundness and compliance with the intention of the creators of the data.
Data synchronization
The active node transmits the dynamically configured data to the standby node.
Daylight Saving Time
Daylight Saving Time, an hour earlier than GMT.
DC
Direct Current
DCCC
Dynamic Channel Configuration Control
DCCC threshold rate
If the request rate is lower than or equal to this rate, the dynamic allocation algorithm do not work.
DCCH
Dedicated Control Channel
DCH
Dedicated Channel
DDN
Digital Data Network
DDS
See Direct Digital Synthesis
Decompress
The act of restoring the original header.
Destination Signaling Point
One of a set of destination signalling point polled by the signalling point, the set corresponding to those destination signalling points in the network where congestion is likely to occur.
DGPS
Differential Global Positioning Systems
DHCP
See Dynamic Host Configuration Protocol
Differential coding
A compression technique where the compressed value of a header field is the difference between the current value of the field and the value of the same field in the previous header in the same packet stream.
By differential coding, the decompressor obtains the value of the field by adding the value in the compressed header to its context.
Differentiated Services
A method for adding quality of service (QoS) to IP networks. Operating at layer 3 only, Diffserv uses the IP type of service (TOS) field as the Diffserv byte (DS byte). Diffserv does not provide traffic engineering or hard quality of service similar to ATM. Diffserv can be used at the edges of the network for classification and assignment to the right connection, while MPLS is used within the network.
DiffServ
See Differentiated Services
DiffServ Code Point
A Differentiated Services (DiffServ) Code Point is a marker in the header of each IP packet that prompts network routers to apply differentiated grades of service to various packet streams. It is specified by the DiffServ policy proposed by the IETF (Internet Engineering Task Force). This allows Internet and other IP-based network service providers to offer different levels of service to customers.
Direct Digital Synthesis
Direct digital synthesis (DDS) is a powerful technique used in the generation of radio frequency signals for use in a variety of applications from radio receivers to signals generators and many more. The technique has become far more widespread in recent years with the advances being made in integrated circuit technology that allow much faster speeds to be handled which in turn enable higher frequency DDS chips to be made. Although often used on its own, Direct Digital Synthesis is often used in conjunction with indirect or phase locked loop synthesizer loops. By combining both technologies it is possible to take advantage of the best
aspects of each. In view of the fact that integrated circuits are now widely available, this makes them easy to use.
Direct-Sequence Code Division Multiple Access
Direct sequence spread spectrum, also known as direct sequence code division multiple access (DS-CDMA), is one of two approaches to spread spectrum modulation for digital signal transmission over the airwaves. In direct sequence spread spectrum, the stream of information to be transmitted is divided into small pieces, each of which is allocated across to a frequency channel across the spectrum. A data signal at the point of transmission is combined with a higher data-rate bit sequence (also known as a chipping code) that divides the data according to a spreading ratio. The redundant chipping code helps the signal resist interference and also enables the original data to be recovered if data bits are damaged during transmission.
Discontinuous Reception
Discontinous Reception (DRX) is a method used in mobile communication to conserve the battery of the mobile device. The mobile device and the network negotiate phases in which data transfer happens. During other times the device turns its receiver off and enters a low power state.
DL
See Downlink
Downlink
Unidirectional radio link for the transmission of signals from a UTRAN access point to a UE. Also in general the direction from Network to UE.
DPB
Downlink Power Balance
DPUb
RNC Data Processing Unit REV:b
DRD
Directed Retry Decision
Drift Radio Network Controller
The role of the drift RNC is to support the serving RNC with radio resources for the mobile terminal connection in cells controlled by the drift RNC.
DRNC
See Drift Radio Network Controller
DRNS
Drift Radio Network System
DRX
See Discontinuous Reception
DS-CDMA
See Direct-Sequence Code Division Multiple Access
DSCP
See DiffServ Code Point
DSCS
Distant Supported Codec Set
DSP
See Destination Signaling Point
DST
See Daylight Saving Time
DTCH
Dedicated Traffic Channel
Dual BAM servers
The BAM has two servers. One BAM server works in active mode and the other works in standby mode. When the active BAM server breaks down because of any hardware fault or irrecoverable software fault, the standby BAM server is switched over to work in active mode and resumes the functions.
Dynamic Host Configuration Protocol
Dynamic Host Configuration Protocol (DHCP) is a client-server networking protocol. A DHCP server provides configuration parameters specific to the DHCP client host requesting, generally, information required by the host to participate on the Internet network. DHCP also provides a mechanism for allocation of IP addresses to hosts.
E
E-AGCH
E-DCH Absolute Grant Channel
E-DCH
See Enhanced Dedicated Channel
E-DCH active set
A set of the cells that carry E-DCH for one UE.
E-DCH MAC-d flow
MAC-es PDUs that carry MAC-d data sharing the same traffic characteristics and that can be multiplexed with MAC-es PDUs of the same type or other MAC-d flows on MAC-e.
E-DPCCH
E-DCH Dedicated Physical Control Channel
E-DPDCH
E-DCH Dedicated Physical Data Channel
E-HICH
E-DCH HARQ Acknowledgement Indicator Channel
E-RGCH
E-DCH Relative Grant Channel
E-TFCI
E-DCH Transport Format Combination Indicator
Eb/N0
Ratio of bit energy to noise spectral density
Desired SNR for demodulating transmit signals. The values in the uplink and in the downlink are different.
Ec/N0
Ratio of received energy per chip to noise spectral density
The CPICH Ec/N0 is identical to each RSSI carried by CPICH RSCP/UTRA. Measurement can be performed on the primary CPICH.
EDGE
See Enhanced Data rates for GSM Evolution
EF
See Expedited Forwarding
Electronic Serial Number
A 32-bit number assigned by the mobile station manufacturer, uniquely identifying the mobile station equipment.
EMC
Electromagnetic Compatibility
EMS
Element Management System
Enhanced Data rates for GSM Evolution
EDGE allows higher data transmission speeds based on the GSM standard.
Enhanced Dedicated Channel
A new type of dedicated transport channel or an enhancement to an existing type of dedicated transport channel.
Equivalent number of users
A fully-activated 12.2 kbit/s AMR speech service is called a reference service. The uplink interference raised and the downlink power consumed by the reference service are equal to those by an equivalent user respectively.
Erlang
A unit of measurement of telephone traffic. It is equal to one hour of conversation (3,600 seconds or 36 CCS). It also specifies the approximate number of trunks in use; for example, if the traffic in a call center is 8.5 Erlangs in one hour, more than 8 trunks were used in that hour.
ESN
See Electronic Serial Number
ETS
European Telecommunication Standards
ETSI
European Telecommunications Standards Institute
Event alarm
Alarm caused by a predefined event, such as congestion, that happens when the equipment is running. The alarm represents an instantaneous status of the system and the status may not be a fault. Some event alarms are generated repeatedly and regularly.
Expedited Forwarding
Expedited Forwarding (EF) is a service defined under the Differentiated Services framework.
Extensible Markup Language
A specification developed by the W3C. XML is a pared-down version of SGML, designed especially for Web documents. It allows designers to create their own customized tags, enabling the definition, transmission, validation, and interpretation of data between applications and between organizations.
External RNC network
The logical network between the BAM and the LMT/M2000. It is used to connect the LMT/M2000 to the RNC OM subsystem.
External virtual IP address
The virtual IP address used for the communication between the BAM and the LMT.
FFACH
Forward Access Channel
FAM
See Front Administration Module
FAQ
Frequently Asked Question
Fault alarm
Alarm caused by hardware faults, for example, board failure, or by the abnormity of major functions. After handling, a fault alarm can be cleared, upon which the NE reports a recovery alarm. Fault alarms are of higher severity than event alarms.
FCC
See Federal Communications Commission
FDD
See Frequency Division Duplex
FE
Fast Ethernet
Federal Communications Commission
Federal Communications Commission is a U.S. government agency that supervises, licenses, and controls electronic and electromagnetic transmission standards.
FER
See Frame Error Rate
FG2a
RNC packet over electronic 8-port FE or 2-port GE ethernet Interface unit REV:a
Fixed IP address
The IP addresses that are permanently bound with the Ethernet adapters of the active and the standby nodes.
The fixed IP addresses are used for the heartbeat communication between the nodes. Neither the host nor the LMT can access the fixed IP addresses.
Flow control
A set of mechanisms used to prevent the network from being overloaded by regulating the input rate transmissions
Forced Soft Handover
In the CELLID+RTT positioning method, the RNC forcibly triggers soft handover by lowering the threshold of 1A event during the positioning.
ForceSHO
See Forced Soft Handover
FP
See Frame Protocol
Fractional ATM
A function with which ATM cells are transmitted through some of the 32 E1/T1 timeslots. ATM cells are mapped to some of the E1/T1 timeslots, instead of all of the timeslots. At the peer end, the ATM cell stream is recovered from these E1/T1 timeslots. The timeslots that are unavailable for ATM cell transmission can transmit other information.
Frame Error Rate
The number of frames in error divided by the total. These frames are usually discarded, in which case this can be called the Frame Erasure Rate.
Frame Protocol
A protocol used in UMTS on the Iur and Iub interfaces to frame channels supported between the SRNC (Serving Radio Network Controller) and UE (User Equipment).
Frequency Division Duplex
Frequency division duplex (FDD) is the application of frequency-division multiple access to separate outward and return signals. The uplink and downlink sub-bands are said to be separated by the "frequency offset".
Front Administration Module
Front Administrator Module, including the switching subsytem and the service processing subsystem. It is also called the main system of RNC.
FTP
File Transfer Protocol
Full header
An uncompressed header that updates or refreshes the context for a packet stream. It carries a CID. For a non-TCP packet stream, a full header also carries a generation.
GGAI
Geographical Area Identifier
Gateway GPRS Support Node
The Gateway GPRS Support Node supports the edge routing function of the GPRS network. To external packet data networks the GGSN performs
the task of an IP router. Firewall and filtering functionality, to protect the integrity of the GPRS core network, are also associated with the GGSN along with a billing function.
Gateway Mobile Location Center
The Gateway Mobile Location Centre contains functionality required to support LCS (LoCation Services). In one PLMN (Public Land Mobile Network), there may be more than one GMLC. The GMLC is the first node an external LCS client accesses in a GSM or UMTS network. The GMLC may request routing information from the HLR (Home Location register) or HSS (Home Subscriber Server). After performing registration authorization, it sends positioning requests to either the VMSC (Visited Mobile Switching Centre), SGSN (Serving GPRS Support Node) or MSC (Mobile Switching Centre) Server and receives final location estimates from the corresponding entity.
GBP
Power Requirement for GBR
GBR
See Guaranteed Bit Rate
GByte
Gigabyte
GCGa
RNC General Clock with GPS Card REV:a
GCUa
RNC General Clock Unit REV:a
GDOP
Geometric Dilution Of Precision
GE
Gigabit Ethernet
General Packet Radio Service
A mobile data service available to users of GSM mobile phones. It is often described as "2.5G", that is, a technology between the second (2G) and third (3G) generations of mobile telephony.
Generation
A number that is incremented whenever the context with a specified CID changes.
A generation is specific for a non-TCP packet stream and carried by a full or compressed non-TCP header. Each new version of the context with a specified CID is associated with a generation.
GGSN
See Gateway GPRS Support Node
GHz
Gigahertz
Global System for Mobile communications
The Global System for Mobile communications is a second generation cellular telecommunication system which was first planned in the early 1980s. Unlike first generation systems operating at the time, GSM was digital and thus introduced greater enhancements such as security, capacity, quality and the ability to support integrated services. Initially, GSM was planned to be a European system allowing subscribers to roam between different networks however, GSM was quickly adopted by many other regions and is now a “Global System”. Today, there are over 400 GSM network operators or carriers located in 182 countries and supporting collectively nearly 700 million subscribers.
GMLC
See Gateway Mobile Location Center
GMT
See Greenwich Meridian Time
GOS
See Grade of Service
GOUa
RNC 2-port packet over Optical GE ethernet Interface Unit REV:a
GPRS
See General Packet Radio Service
GPRS Tunneling Protocol for User Plane
GPRS Tunneling Protocol - User plane messages are exchanged between GSN (Gateway Support Node) pairs or GSN/RNC (Radio Network
Controller) pairs in a path. The user plane messages are used to carry user data packets, and signalling messages for path management and error indication.
GPS
Global positioning system (GPS) consists of three functional units: space segment (satellites), user segment (receivers), and control segment (GPS satellite observation and control network).
Grade of Service
Grade of Service defines the quality of a telephone service in terms of a user receiving a network busy signal.
Graphic User Interface
A visual computer environment that represents programs, files, and options with graphical images, such as icons, menus, and dialog boxes on the screen. The user can select and activate these options by pointing and clicking with a mouse or, often, with the keyboard. A particular item (such as a scroll bar) works the same way to the user in all applications, because the graphical user interface provides standard software routines to handle these elements and report the user's actions (such as a mouse click on a particular icon or at a particular location in text, or a key press); applications call these routines with specific parameters rather than attempting to reproduce them from scratch.
Greenwich Meridian Time
Greenwich Meridian Time
GSM
See Global System for Mobile communications
GSM security context
A state established between a UE and a serving network domain as a result of the execution of GSM AKA. In this state, both ends store GSM security context data. The data consists at least of GSM cipher Kc and cipher key sequence number (CKSN).
GTP-U
See GPRS Tunneling Protocol for User Plane
Guaranteed Bit Rate
The minimum bit rate for the RNC to adjust. It is contained in the RAB assignment message that the CN sends to the RNC.
HHandover
The transfer of a user's connection from one radio channel to another (can be the same or different cell).
Hard Disk
A rigid magnetic disk fixed permanently within a drive unit and used for storing computer data. Hard disks generally offer more storage and quicker access to data than floppy disks do.
Hard Handover
A handover, is the process in which a cellular phone is handed from one cell to the next in order to maintain a radio connection with the network. A hard handover results in the radio connection being broken between the network and the mobile, before a new radio connection is established with the network in the target cell. Hard handovers usually require a change of frequency.
HARQ
See Hybrid Automatic Repeat Request
HARQ profile
One HARQ profile consists of a power offset attribute and a maximum number of retransmissions.
HC
Header Compression
HCS
See Hierarchical Cell Structure
HD
See Hard Disk
HDLC
See High-Level Data Link Control
HE
Home Environment
Heartbeat
Signals sent from one node to the others to notify the working status of the node. The heartbeat is messages without responses. Both the active and the standby BAM servers send the heartbeat periodically.
The dual-BAM-server system monitors the heartbeat to ensure that the active and the standby BAM servers work in proper status.
HFC
HSL Foundation Component
HHO
See Hard Handover
Hierarchical Cell Structure
This is a term typically used to describe the priority of cells within a mixed environment. That is when Macro, Micro, and Pico cells may be viewed as candidates for cell reselection the priority described by the HCS will be used in the associated calculations.
High Speed Downlink Packet Access
A modulating-demodulating algorithm put forward in 3GPP R5 to meet the requirement for asymmetric uplink and downlink transmission of data services. It enables the maximum downlink data service rate to reach 14.4 Mbit/s without changing the WCDMA network topology.
High-Level Data Link Control
A Link-Level protocol used to facilitate reliable point-to-point transmission of a data packet.
HLR
See Home Location Register
HO
See Handover
Home Location Register
The location register to which a MIN/IMSI is assigned for record purposes such as subscriber information.
Hot Spot
A cell that has high traffic and a large quantity of users
HS-DPCCH
High Speed Dedicated Physical Control Channel
HS-DSCH
High Speed Downlink Shared Channel
HS-PDSCH
High Speed Physical Downlink Shared Channel
HS-SCCH
High Speed Shared Control Channel
HSDPA
See High Speed Downlink Packet Access
HSDPA cell
The cells in which the HSDPA related resources are configured, such as HSDPA power resource and HSDPA code resource.
HSDPA Serving cell
The cells through which the HSDPA user's data is transmitted. Each active HSDPA user has only one HSDPA serving cell at one time.
HSL
High-level Script Language
HSUPA
High Speed Uplink Packet Access
HTML
See Hyper Text Markup Language
Hybrid Automatic Repeat Request
A multi-instance Stop-and-Wait (SAW) protocol
The number of HARQ processes is 4 for a 10 ms TTI and 8 for a 2 ms TTI.
One HARQ entity handles the hybrid ARQ functionality for one user. One HARQ entity is capable of supporting multiple instances (HARQ process) of stop and wait HARQ protocols. There should be one HARQ process per HS-DSCH per TTI. During retransmission, the UE employs soft combining, that is, it combines soft information from previous transmission attempts
with the latest transmission to increase the probability of successful decoding.
Hyper Text Markup Language
Hypertext Mark-up Language (HTML). A Standard Generic Mark-up Language used for WWW documents. Defined by IETF RFC 1866 (Version 2).
I
IAC
Intelligent Access Control
ICM
Initial Codec Mode
ID
Identity
IDNNS
Intra Domain NAS Node Selection
IE
See Information Element
IEC
International Electrotechnical Commission
IK
See Integrity Key
IMA
See Inverse Multiplexing over ATM
IMEI
See International Mobile Equipment Identity
IMSI
See International Mobile Subscriber Identity
Inactive process
HARQ process for which scheduling grants are not applicable, that is, in which scheduled data cannot be sent.
Incorrect decompression
A situation where a decompressed header is different from the header before compression.
Usually, incorrect decompression is due to context mismatch between the compressor and decompressor or due to bit errors during transmission of the compressed header.
Information Element
An Information Element is a group of information which may be included within a signalling message or data flow which is sent across an interface. Examples may include QoS (Quality of Service) definitions, setup parameters, user identifiers etc.
Insulation test
A test that is performed to check whether the cabinet is insulated from the earth by measuring the resistance between the cabinet and the earth when the multimeter is set to the megaohm range. This test helps to ensure that the required insulation parts are installed and are intact.
Integrity Key
A 128bit number used to protect the integrity of information passing between the RNC (Radio Network Controller) and the UE (User Equipment) in UMTS .
Inter-frequency neighboring cell
A cell that has partially overlapping coverage with the serving cell and uses a different frequency from that of the serving cell.
Internal RNC network
The logical network between the BAM and the RNC FAM. It is used for the communication between the BAM and the FAM.
Internal virtual IP address
The virtual IP address used for the communication between the BAM and the host.
International Mobile Equipment Identity
The International Mobile Equipment Identity is a unique identifier allocated to each ME (Mobile Equipment). It consists of a TAC (Type Approval Code), a FAC (Final Assembly Code), SNR (Serial Number) and a Spare Digit.
International Mobile Subscriber Identity
A method of identifying stations in the land mobile service as specified in CCITT Recommendation.
Internet Protocol
Internet Protocol is a standardized method of transporting information across the Internet in packets of data. It is often linked to Transmission Control Protocol, which assembles the packets once they have been delivered to the intended location.
Interworking Function
The Interworking Function is used to provide circuit switched data services when connecting a cellular network to a PSTN. It is comprised of rate adapters, modems and fax adapters.
Intra-frequency neighboring cell
A cell that has partially overlapping coverage with the serving cell. In addition, this cell and the serving cell use the same frequency.
Inverse Multiplexing over ATM
Inverse Multiplexing over ATM. With this function, the transmisstion end inversely multiplexes the ATM cells on a high speed transport link to multiple low speed ATM circuits, and the reception end combines the low speed ATM circuits back into a high speed logical path.
IOS tracing
This task is performed to trace a specified number of calls which access a specified cell continuously. The number of calls can be defined when the task is started.
The number of calls can be set when the task is started.
The messages during the call procedure are traced.
IP
See Internet Protocol
IP over ATM
Classical IP over ATM protocols are used to carry the IP packets over the ATM transport network.
IP Security
IP Security provides a framework of open standards dealing with data confidentiality, integrity, and the authentication between participating hosts.
IPCP
Internet Protocol Control Protocol
IPoA
See IP over ATM
IPSec
See IP Security
IPv4
The abbreviation of Internet Protocol version 4. IPv4 utilizes a 32bit address which is assigned to hosts. An address belongs to one of five classes (A, B, C, D, or E) and is written as 4 octets separated by periods and may range from 0.0.0.0 through to 255.255.255.255. Each address consists of a network number, an optional subnetwork number, and a host number. The network and subnetwork numbers together are used for routing, and the host number is used to address an individual host within the network or subnetwork. IPv4 addresses may also be represented using CIDR (Classless Inter Domain Routing).
IPv6
The abbreviation of Internet Protocol version 6. IPv6 provides a replacement for IPv4. IPv6 includes support for flow Identity in the packet header, which can be used to identify flows and improve QoS (Quality of Service). IPv6 was formerly known as IPng (next generation).
IR
Incremental Redundancy
Iu Flex
Intra Domain Connection of RAN Nodes to Multiple CN Nodes
Iu UP
Iu User Plane
Iu-BC Interface
Interface between RNC and CBC.
Iur interface
Interface between RNCs
IWF
See Interworking Function
KKey property
A property that can uniquely identifies an object example
KR
Kaufman-Roberts algorithm
LLA
See Location Area
LAC
See Location Area Code
LAI
See Location Area Identity
LAN
See Local Area Network
LCC
Load Congestion Control
LCP
See Link Control Protocol
LCS
See Location Service
LCS client
An entity subscribing to LCS and interacting with a LCS server to obtain location information of one or more UEs.
It can either interact with UEs or not.
In addition to managing the user interface, it is responsible for formatting and displaying data. It can reside in the UE.
LCS server
A software and/or hardware entity offering LCS capabilities. It receives service requests and sends back replies.
LDB
Load Control Balancing
LDC
Load Control
LDM
Load Monitor
LDR
Load Reshuffling
Link Control Protocol
In the Point-to-Point Protocol (PPP), the Link Control Protocol (LCP) establishes, configures, and tests data-link Internet connections.
LLC
Link Layer Control
LMT
The abbreviation of Local Maintenance Terminal. The LMT is a logical concept. The LMT connects to the external RNC/NodeB network and provides the GUI for the OM of the RNC/NodeB. In the RNC/NodeB OM subsystem, the LMT is the terminal for operators to perform the OM.
LMT application
The LMT application refers to the Huawei Local Maintenance Terminal software.
LMT PC
The LMT PC is the hardware of the LMT. It refers to the computer on which the LMT software is installed.
LMU
See Location Measurement Unit
LMU-A
LMU type A
LMU-B
LMU type B
Local Area Network
A local area network (LAN) is a computer network covering a local area, like a home, office or small group of buildings such as a college.
local time
The same as the display time of a local computer. The local time varies according to the time zone.
Location Area
A Location Area (LA) is an area defined in the Core Network (CN).
Location Area Code
The Location Area Code uniquely identifies a LA (Location Area) within a PLMN (Public Land Mobile Network). It may range from 0 to 65,535.
Location Area Identity
The Location Area Identity uniquely identifies a LA (Location Area) within any PLMN (Public Land Mobile Network). It is comprised of the MCC (Mobile Country Code), MNC (Mobile Network Code) and the LAC (Location Area Code).
Location based application
Location information can either be input by users or obtained by UTRAN or UE measurement. Navigation is a typical example of location based application.
Location Measurement Unit
In GSM or UMTS a Location Measurement Unit makes radio measurements to support positioning of mobiles. Two categories of measurements are identified, the first identifies measurements specific to one MS (Mobile Station) used to compute its location. The second method provides assistance measurements which is specific to all mobiles in a defined geographic area.
Location Service
Location Service (LCS) specifies all the network elements necessary to implement location services in a cellular network, as well as their functions, interfaces and communication messages.
MM2000
iManager M2000 (M2000 for short). M2000 is a managing platform for WCDMA. It is developed by Huawei.
M3UA
See MTP3 User Adaption Layer
MAC
See Media Access Control
MAC-c
See Media Access Control - common
MAC-d
Medium Access Control - dedicated
MAC-e
MAC-e Entity (handling E-DCH specific functions)
MAC-hs
Medium Access Control for HSDPA
Maximum Transfer Unit
The MTU (Maximum Transmission Unit) is the size of the largest datagram that can be sent over a network.
MB
Mega Byte
MBMS
See Multimedia Broadcast Multicast Service
MBR
Maximum Bit Rate
MCC
See Mobile Country Code
MCCH
MBMS point-to-multipoint Control Channel
MCPPP
Multi-Class Extension to Multi-link PPP
MDSP
Mobile Data Service Platform
Mean Time Between Failures
The average time between consecutive failures of a piece of equipment. It is a measure of the reliability of the system.
Mean Time To Repair
The average time that a device will take to recover from a failure.
Media Access Control
Media Access Control is the lower of the two sublayers of the Data Link Layer. In general terms, MAC handles access to a shared medium, and can be found within many different technologies. For example, MAC methodologies are employed within Ethernet, GPRS, and UMTS etc.
Media Access Control - common
The MAC-c/sh controls access to common transport channels.
Media Gateway
A gateway that supports both bearer traffic and signalling traffic.
Message Transfer Part Level 3
The Message Transfer Part (MTP) is part of the Signalling System 7 (SS7) used for communication in Public Switched Telephone Networks. MTP Level 3 provides routing functionality to transport signaling messages through the SS7 network to the requested endpoint.
Message Transfer Part level 3 broadband
Message Transfer Part level 3 broadband provides message routing, discrimination and distribution (for point to point link only). It also provides signalling link management, load sharing and changeover between links within one link-set. The protocol is a broadband ISDN based protocol used typically in ATM (Asynchronous Transfer Mode) .
MGW
See Media Gateway
MICH
MBMS notification Indicator Channel
MLPPP
Multi-link PPP
MMC
Multimedia Controller
MML
Man Machine Language
MNC
See Mobile Network Code
Mobile Country Code
The Mobile Country Code is a three digit number uniquely identifying a given country. It is utilized within the IMSI (International Mobile Subscriber Identity) and LAI (Location Area Identity).
Mobile Network Code
The Mobile Network Code is either a two or three digit number used to uniquely identify a given network from within a specified country (MCC (Mobile Country Code)). The MNC is used as part of the IMSI (International Mobile Subscriber Identity) and LAI (Location Area Identity) etc.
Mobile Service Switching Center
MSC is in the core position of switching in the CDMA system. MSC provides interfaces connecting with each function entity and public network in the CDMA system and implements interconnection between mobile subscribers and interconnection between mobile subscriber and PSTN subscriber.
Mobile Station
A station in the Public Cellular Radio Telecommunications Service intended to be used while in motion or during halts at unspecified points.
Most Significant Bit
The most significant bit (MSB) is the bit in a multiple-bit binary number with the largest value.
MRC
Maximum Ratio Combining
MS
See Mobile Station
MSB
See Most Significant Bit
MSC
See Mobile Service Switching Center
MSC Server
Mobile Service Switching Center Server
MSCH
MBMS point-to-multipoint Scheduling Channel
MTBF
See Mean Time Between Failures
MTP3
See Message Transfer Part Level 3
MTP3 User Adaption Layer
The MTP3 User Adaptation Layer provides the equivalent set of primitives at its upper layer to the MTP3 users as provided by the MTP Level 3. In this way, the ISUP (ISDN User Part) and/or SCCP (Signalling Connection Control Part) layer is unaware that the expected MTP3 services are offered remotely and not by a local MTP3 layer. In effect, the M3UA extends access to the MTP3 layer services to a remote IP based application. The M3UA does not itself provide the MTP3 services.
MTP3B
See Message Transfer Part level 3 broadband
MTTR
See Mean Time To Repair
MTU
See Maximum Transfer Unit
Multi-hop
Data are forwarded by multiple uncertain routers before reaching the destination.
Multicast PVC
This PVC is used to transmit the same data to multiple nodes.
Multimedia Broadcast Multicast Service
The MBMS is a unidirectional point to multipoint bearer service in which data is transmitted from a single source entity to multiple recipients. These services will typically be in the form of streaming video and audio and should not be confused with the Cell Broadcast Service that is currently supported.
NN-PDU
Network Protocol Data Unit
NACK
See Negative Acknowledgement
NAS
See Non-Access Stratum
NBM
NodeB Management Module
NCP
See Network Control Protocol
NE
See Network Element
Near-far interference
Near-far interference occurs when a desirable signal from a far-away user is interfered with by another user close to intended receiver.
Negative Acknowledgement
The opposite of the ACK signal. It indicates a message was not received correctly, or that the terminal is not ready to send.
Neighboring cell
The neighboring cells of the reference cell confirmed during a UE positioning process. The AGPS positioning method needs no neighboring cells.
In CELLID+RTT and OTDOA positioning methods, UEs need to measure signals of the reference cell and the neighboring cells simultaneously to obtain geographic locations of cells for accurate positioning.
Neighboring GSM Cell
A cell that is adjacent to the serving cell but belongs to a GSM or GSM/GPRS system.
Network Assisted GPS
Assisted Global Positioning System is a technique enabling both mobiles and cellular networks to establish accurate positioning information. The system utilizes both the GPS (Global Positioning System) and the terrestrial cellular network and is one of the LCS (Location Services) methodologies.
Network Control Protocol
This is the program that switches the virtual circuit connections into place, implements path control, and operates the Synchronous Data Link Control (SDLC) link.
Network Element
A Network Element refers to a communication equipment in the network, such as RNC and NodeB.
Network Management System
A Network Management System (NMS) is a combination of hardware and software used to monitor and administer a network. Individual network elements (NEs) in a network are managed by an element management system.
Network Time Protocol
NTP is a protocol designed to synchronize the clocks of computers over a network. NTP version 3 is an internet draft standard, formalized in RFC 1305. NTP version 4 is a significant revision of the NTP standard, and is the current development version, but has not been formalized in an RFC. SNTP (Simple NTP) version 4 is described in RFC 2030.
Network to Network Interface
This is an internal interface within a network linking two or more elements.
NMS
See Network Management System
NNI
See Network to Network Interface
NNSF
Non Access Stratum (NAS) Node Selection Function
NodeB
A logical node responsible for radio transmission/reception in one or more cells to/from the UE. It connects to the RNC through the Iub interface.
Non Real-Time Variable Bit Rate
The nrt-VBR service category is used for connections that transport variable bit rate traffic for which there is no inherent reliance on time synchronisation between the traffic source and destination, but there is a need for an attempt at a guaranteed bandwidth or latency.
Non-Access Stratum
The Non Access Stratum is a functional layer running between the UE (User Equipment) and the CN (Core Network). The layer supports traffic and signalling messages between the CN and UE (User Equipment).
Non-serving E-DCH RL or non-serving RL
A cell that belongs to the E-DCH active set rather than the serving E-DCH RLS and from which the UE can receive one relative grant. The UE can have zero, one, or several non-serving E-DCH RLs.
NRI
Network Resource Identifier
NRNC
Neighboring Radio Network Controller
NRT
Non-Real-Time
NRT-VBR
See Non Real-Time Variable Bit Rate
NTP
See Network Time Protocol
OObject category
A category of objects in the wireless configuration model
For instance, the AAL2 path, SAAL link, or cell can be referred to as an object category respectively.
Object example
An example for an object category
For instance, the cell with the ID of 0 is an object example for the object category of cell.
OCXO
Oven Controlled Crystal Oscillator
Offline command
A command that comes into effect only when the host is reset after successful execution of the MML command.
OLC
See Overload Control
OLPC
Outer Loop Power Control
OM-DBG
OM-DBG is an internal module of the SPU. It has the following functions:
• Receiving tasks sent from the BAM
• Generating filter tables
• Maintaining the task check between the BAM and the SPU
• Maintaining the message channels between the trace tasks and the LMT
• Informing the traffic processing module of the change of trace tasks
• Providing message channels from the traffic processing module to the BAM or LMT
• Providing interfaces for reporting data messages of the traffic module
• Providing interfaces for flow control
OMC
See Operation and Maintenance Center
OMIP
IP Address of Operation and Maintenance
OMUa
RNC Operation and Maintenance Unit REV:a
Operating System
The software that controls the allocation and usage of hardware resources.
Operation and Maintenance Center
An Operations and Maintenance Centre is an element within a network management system responsible for the operations and maintenance of a specific element or group of elements. For example an OMC-Radio may be responsible for the management of a radio subsystem where as an OMC-Switch may be responsible for the management of a switch or exchange. However, these will in turn be under the control of a NMC (Network Management Centre) which controls the entire network.
OPEX
Operating Expenditure
Orthogonal Variable Spreading Factor
Orthogonal variable spreading factor (OVSF) is an implementation of Code division multiple access (CDMA) where before each signal is transmitted, the spectrum is spread through the use of a user's code.
OS
See Operating System
OS tracing
OS tracing is used to trace the messages inside the Operating System (OS).
OTDOA
Observed Time Difference Of Arrival
Overbooking
An engineering method of improving the usage of resources
Overload Control
A means to restrict reverse analog control channel accesses by mobile stations. Mobile stations are assigned one (or more) of sixteen control levels.
OVSF
See Orthogonal Variable Spreading Factor
PP-TMSI
See Packet Temporary Mobile Subscriber Identity
PA
Power Amplifier
Packet Control Unit
The Packet Control Unit is a device found within a GPRS network which is logically associated with a BSC (Base Station Controller). The PCU is responsible for the radio related aspects of GPRS when connected to a GSM network and lies between the BTS (Base Transceiver Station) and the SGSN (Serving GPRS Support Node).
Packet Data Convergence Protocol
Packet Data Convergence Protocol is used in UMTS to format the data into a suitable structure prior to transfer over the air interface.
Packet Data Serving Node
A Packet Data Serving Node is responsible for the establishment, maintenance and termination of a PPP (Point to Point Protocol) session towards the MS (Mobile Station). It may also assign dynamic IP addresses in addition to supporting Mobile IP functionality. It provides a similar function to the GSN (GPRS Support Nodes) found in GSM and UMTS networks.
Packet stream
A sequence of packets that have similar headers and share a context.
Packet Temporary Mobile Subscriber Identity
Used as a shorter, more private, mobile identifier. Identifies the system that assigned it, and not directly the MS.Packet-TMSI is allocated by the SGSN and used for GPRS access only.
Page Indicator Channel
A fixed rate (SF=256) physical channel used to carry the Page Indicators (PI).
PAMU
PAMU
Patch
A patch is composed of one or more changes. After the patch is loaded, some original programs are affected. The realization of the patch technology depends on the patch facture tool first. The patch file is generated based on the target codes created by the compilation of source codes modified by functions. The patch module operates the patch file and implements the management of the patch. Patches have two kinds, that is, hot patches and cold patches. The difference between the hot patches and the cold patches are that the cold patches must load whole software programs. Hot patches can be installed independently and need not install all the system again. Cold patches, however, need install the software of boards again. The upgrade procedure for the cold patches is identical to some software upgrade procedures. The following two patches are describes as follows:
• Hot patches, Hot patches are added to the existing version. The hot patches are independent of the server, Install program, or file copying. Thus, the hot patches are software program entities that are installed and uninstalled independently.
• Cold patches, For some errors that are difficult to modify through the hot patches, you have to load the software of boards again. In this situation, you can use cold patches to solve this problem.
PBR
Provided Bit Rate
PC
Personal Computer
PCA
Power Control Algorithm
PCCPCH
Primary Common Control Physical Channel
PCH
Paging Channel
PCI
Peripheral Component Interconnect
PCM
See Pulse Coded Modulation
PCPICH
Physical Common Pilot Channel
PCU
See Packet Control Unit
PDCP
See Packet Data Convergence Protocol
See Power Distribution Frame
PDH
See Plesiochronous Digital Hierarchy
PDSCH
See Physical Downlink Shared Channel
PDSN
See Packet Data Serving Node
PDU
See Protocol Data Unit
Periodical granularity
Intervals between flow control decisions
PEUa
RNC 32-port Packet over E1/T1/J1 Interface Unit REV:a
Phase-locked Loop
A circuit that consists essentially of a phase detector which compares the frequency of a voltage-controlled oscillator with that of an incoming carrier signal or reference-frequency generator; the output of the phase detector, after passing through a loop filter, is fed back to the voltage-controlled oscillator to keep it exactly in phase with the incoming or reference frequency.
Physical Downlink Shared Channel
The physical downlink shared channel (PDSCH) is used to carry the downlink shared transport channel. This channel carries control information for several users that share the channel.
PICH
See Page Indicator Channel
PID
See Process Identification
Pilot pollution
Pilot pollution, i.e., too many hearable pilots, makes it difficult for SHO algorithm to perform properly, and DL transmit power as well as signaling capacity can be wasted for poor decisions and unnecessary active set updates.
Ping-pong effect
Frequent handovers between cells due to changes in signal quality or improper parameter settings
Plesiochronous Digital Hierarchy
The Plesiochronous Digital Hierarchy (PDH) is a technology used in telecommunications networks to transport large quantities of data over digital transport equipment such as fibre optic and microwave radio systems.
PLL
See Phase-locked Loop
PLMN
See Public Land Mobile Network
Policy A
The rate adjustment policy for BE services of the PS domain when the UE is in the CELL_DCH state. The rate can be increased or decreased.
Policy B
The rate adjustment policy for BE services of the PS domain when the UE is in the CELL_DCH state. The state of the UE can be transited to FACH at any time.
Positioning
This function is used to estimate the geographic locations of UEs.
Positioning method
Principles or algorithms that the positioning is based on.
POUa
RNC 2-port IP over channelized Optical STM-1/OC-3 Interface Unit REV:a
Power Distribution Frame
Power Distribution Frame. It is a high-current power supply in the equipment room.
Power offset attribute
Power offset between E-DPDCH power level and reference E-DPDCH power level of a given E-TFC.
Power offset is set to achieve the required QoS in this MAC-d flow when carried alone in a MAC-e PDU and subsequently in the corresponding CCTrCh of E-DCH type.
PPP
Point-to-Point Protocol
PPPMUX
PPP Multiplexing
PPPoE
Point-to-Point Protocol over Ethernet
PQ
Priority Queue
Present rollback point
Used to set the present status of the configured data
The system automatically allocates a rollback point to record the present configuration status. When the user performs configuration forward or configuration rollback, the present rollback point changes accordingly.
Process Identification
An identification number that is automatically assigned to each process when it is created on a Unix-like operating system.
Program channel
• Corresponding to one channel of multimedia program source
• Corresponding to specific program data
• Distinguished by IP address, that is, RNC identifies programs by different destination IP addresses.
Program SDP file
SDP refers to the session description protocol.
The program SDP file stores the program data including the bandwidth and the format of the program, and the port numbers for the audio and video. The data are used for decoding and playing the program.
The SDP file is generated by the multimedia controller when the multimedia program is made. The SDP file is saved in the directory of BAM\FTP\SDP.
Protection grounding bar
A bar connecting the PGND cable of the cabinet so that the cabinet and the earth are in the same equipotential level.
Protocol Data Unit
A Protocol Data Unit comprises of data and control information which is passed between layers in a protocol stack.
PS
Packet Switched
PSTN
See Public Switched Telephone Network
Public Land Mobile Network
A Public Land Mobile Network is a generic name for all mobile wireless networks that use land based radio transmitters or base stations.
Public Switched Telephone Network
This is a general term referring to the variety of telephone networks and services.
PUC
Potential User Control
Pulse Coded Modulation
PCM is a Time-Domain Waveform coding method and is defined within CCITT G.711, and ATT 43801. Basically, an analog signal is sampled at a rate of 8000 times per second. In each sample, the amplitude of the signal is assigned (quantized) a digital value.
Push-button
Operated in a highly automatic way
PVC
Permanent Virtual Channel
QQoS
See Quality of Service
QPSK
See Quaternary Phase Shift Keying
Quality of Service
Quality of Service, which determines the satisfaction of a subscriber for a service. QoS is influenced by the following factors applicable to all services: service operability, service accessibility, service maintainability, and service integrity.
In addition, QoS is influenced by other factors that apply to different services.
Quaternary Phase Shift Keying
Quadrature phase shift keying (QPSK) is a method for transmitting digital data across an analog channel. Data bits are grouped into pairs and represented by a unique waveform, called a symbol. Data may be simulated with a pseudo-noise sequence generator.
Quintet, UMTS authentication vector
Temporary protocol of authentication and key, which enables UMTS AKA function for a certain user in a VLR/SGSN. A quintet consists of five elements: Random Number (RAND), Expected Response (XRES), Cipher Key (CK), Integrity Key (IK), and Authentication Token (AUTN).
Parent topic: Glossary
RR98-
A network node or ME that conforms to R97 or R98 specifications
R99 + ME capable of UMTS AKA
Either an R99 + UMTS only ME, an R99 + GSM/UMTS ME, or an R99 + GSM only ME that supports USIM-ME interface
R99 + ME incapable of UMTS AKA
An R99 + GSM only ME that does not support USIM-ME interface
R99 cell
The cells in which the HSDPA related resources are not configured.
R99+
A network node or ME that conforms to specifications of R99 or later releases
RA
See Routing Area
RAB
See Radio Access Bearer
RAB index
A number defined by the RNC for a traffic class supported by the RNC
RACH
Random Access Channel
Radio Access Bearer
Term used in UMTS to identify the service the AS (Access Stratum) provides to the NAS (Non Access Stratum) for transfer of user data between the UE (User Equipment) and the CN (Core Network).
Radio Access Network
The Radio Access Network performs the radio functionality of the network, as well providing the connection to the CN (Core Network). The RAN typically includes a controller (RNC (Radio Network Controller) in 3GPP (Third Generation Partnership Project) and BSC (Base Station Controller) in 3GPP2 (Third Generation Partnership Project 2) and several transmitter/receivers (Node B in 3GPP, BTS (Base Transceiver Station) in 3GPP2).
Radio Access Network Application Part
Radio Access Network Application Part (RANAP) is the Radio Network Layer signaling protocol used in a UMTS system on the Iu interface. It is responsible for function including the setting up of a RAB (Radio Access Bearer) between the CN (Core Network) and the RNC (Radio Network Controller).
Radio Access Technology
This indicates the type of radio technology to access the CN (Core Network). Example technologies being UTRA (UMTS Terrestrial Radio Access), CDMA2000®, DECT (Digital Enhanced Cordless Technology), GERAN (GSM EDGE Radio Access Network) etc.
Radio Bearer
The service provided by the Layer 2 for the transfer of user data between UE (User Equipment) and UTRAN (UMTS Terrestrial Radio Access Network).
Radio Link Control
Radio Link Control (RLC) is a link-layer protocol that is responsible for error recovery and flow control.
Radio Network Controller
This equipment in the RNS is in charge of controlling the use and the integrity of the radio resources.
Radio Network System
The UTRAN (UMTS Terrestrial Radio Access Network) consists of one or more RNS (Radio Network Subsystem). Each RNS control the allocation and the release of specific radio resources to establish a connection between a UE (User Equipment) and the UTRAN.
Radio Network Temporary Identifier
A Radio Network Temporary Identifier is a generic term of an identifier for a UE when an RRC connection exists. Following types of RNTI are defined: Cell RNTI (C-RNTI), Serving RNC RNTI (S-RNTI) and UTRAN RNTI (U-RNTI).
Radio Resource
The resource in radio communication, including the frequncy, time, code, power, space, storage, and links
Radio Resource Control
RRC sublayer executes the integrity protection of both RRC-level and higher layer signalling, by using Integrity Algorithm f9 under the control of the Integrity Key IK (128bits) established during the AKA procedure.
Radio Resource Management
Algorihtm of optimization of the air interface and hardware resources
RAI
See Routing Area Identity
RAN
See Radio Access Network
RANAP
See Radio Access Network Application Part
RAND
See Random Number
Random Number
A number selected from a known set of numbers in such a way that each number in the set has the same probability of occurrence. This is typically used in the authentication and ciphering process.
RAT
See Radio Access Technology
RB
See Radio Bearer
RBR
RNC Business Rack
RBS
RNC Business Subrack
Real Time Streaming Protocol
The RTSP (Real Time Streaming Protocol) is a client-server application-level protocol for controlling the delivery of data with real-time properties. It establishes and controls either a single or several time-synchronized streams of continuous media, such as audio and video. It uses transport protocols such as UDP, multicast UDP, TCP, and RTP to deliver the continuous streams. In other words, RTSP acts as a "network remote control" for multimedia servers. Sources of data can include both live data feeds and stored clips.
Real Time Variable Bit Rate
Describes services with variable data streams and strict real-time requirements, for example, interactive compressed video (video telephony).
Real-Time Transport Protocol
The Real time Transport Protocol is an Internet protocol standard that defines a way for applications to manage the real-time transmission of multimedia data. RTP is used for Internet telephony applications, it does not guarantee real-time delivery of multimedia data, since this is dependent on the actual network characteristics. RTP provides the functionality to manage the data as it arrives to best effect.
Received Signal Code Power
Given only signal power is received, the average power of the received signal after despreading and combining.
Received Signal Strength Indicator
The received wide band power, including thermal noise and noise generated in the receiver, within the bandwidth defined by the receiver pulse shaping filter, for TDD within a specified timeslot. The reference point for the measurement shall be the antenna connector of the UE.
Redirect tracing
Redirect tracing is used to trace the print information of the serial ports on the board subsystem.
Reference cell
A main cell confirmed during a UE positioning process. Usually it is the cell the UE camps on. During soft handover, it is the cell with the best signals.
Regular header
An uncompressed header that carries neither a CID nor a generation.
Relative Time Difference
This means the relative synchronization difference in the network between two base stations.
Request For Comments
A Request for Comments is a formal document from the IETF (Internet Engineering Task Force). It is the result of committee drafting and subsequent review by interested parties. RFC may be informational in nature. Some RFC may be intended to become Internet standards, then the final version of the RFC becomes the standard and no further comments are permitted. Changes can still occur through subsequent RFC that supersede or build on all or parts of previous RFC.
RFC
See Request For Comments
RFN
RNC Frame Number
RL
Radio Link
RLC
See Radio Link Control
RLS
Radio Link Set
RNC
See Radio Network Controller
RNCAP
Radio Network Control Application Part
RNS
See Radio Network System
RNTI
See Radio Network Temporary Identifier
Roaming
The ability for a user to function in a serving network different from the home network. The serving network could be a shared network operated by two or more network operator.
Robustness
Robustness is the ability of a system to maintain function even with changes in internal structure or external environment.
Rollback point
Used to identify the status of the configured data
The rollback point is customized by the user or is automatically allocated by the system, which can identify the status of a configured data. Then the user is able to perform configuration forward or configuration rollback to the rollback point.
Rollback stack
A stack that stores direct and converse MML commands, which is represented with data
Routing Area
The SGSN (Serving GPRS Support Node) in a GPRS system will control one or more RA (Routing Area). It is the responsibility of the mobile to keep the SGSN informed as to its current RA. Routing Areas can be made up on one or more cells. Each Routing Area is given a RAI (Routing Area Identification).
Routing Area Identity
The Routing Area Identification is composed of the LAC (Location Area Code) and the RAC (Routing Area Code). It is used for paging and registration purposes.
Routing Area Update
A GPRS mobile will perform a Routing Area Update in the Ready and Standby state. The RAU is triggered when the mobile crosses a RA (Routing Area) boundary, or periodically. The time interval being set by the network. A RAU is also performed when the mobile moves from the Idle to the Standby state. This will typically happen when the mobile is powered on.
RR
See Radio Resource
RRC
See Radio Resource Control
RRC connection
A point-to-point bi-directional connection between RRC peer entities on the UE and the UTRAN sides, respectively. A UE has either zero or one RRC connection.
RRC state control
Controlling the RRC state transition with different amount of resources consumed in different states
RRM
See Radio Resource Management
RSCP
See Received Signal Code Power
RSN
Retransmission Sequence Number
RSR
RNC Switch Rack
RSS
RNC Switch Subrack
RSSI
See Received Signal Strength Indicator
RT-VBR
See Real Time Variable Bit Rate
RTD
See Relative Time Difference
RTP
See Real-Time Transport Protocol
RTSP
See Real Time Streaming Protocol
RTT
Round Trip Time
RTWP
Received Total Wideband Power
RV
Redundancy Version
RX Diversity
Receive Diversity
SS-RNTI
Serving RNC RNTI
SA
See Service Area
SAAL
See Signaling ATM Adaptation Layer
SAI
See Service Area Identifier
SAP
See Service Access Point
SCCPCH
Secondary-Common Control Physical Channel
SCSI
See Small Computer Systems Interface
SCTP
See Stream Control Transmission Protocol
SCUa
RNC GE Switching and Control Unit REV:a
SDH
See synchronous digital hierarchy
SDP
See Session Description Protocol
SDT CES
Structured Data Transfer for CES. The data in ATM AAL1 cells are assigned to some of the 32 E1 timeslots.
SDU
See Service Data Unit
Sequence number
An identifying number used to designate a block of data, an operation, or part of an operation.
Service Access Point
A conceptual point where a protocol layer offers access to its services to the layer above or below.
Service Area
A Service Area consists of one or more cells within a given LA (Location Area) and may be used to assist in the delivery of location based services.
Service Area Identifier
The Service Area Identifier is used to identify an area consisting of one or more cells belonging to the same LA (Location Area). Such an area is called a Service Area and can be used for indicating the location of a UE (User Equipment) to the CN (Core Network). The SAC (Service Area Code) together with the PLMN-Id (Public Land Mobile Network Identifier) and the LAC (Location Area Code) will constitute the Service Area Identifier. SAI = PLMN-Id + LAC + SAC.
Service Data Unit
Data transferred between adjacent layers in the protocol stack.
Service Factor
Huawei RNC provides OMC configurable parameters Service Factor for Iub overbooking. This factor can be configured for RRC signaling, AMR Voice, CS data, and PS data separately by MML.
Service Level Agreement
Service Level Agreement (SLA) refers to an agreement signed by and between the customer and the Service Provider (SP) which stipulates the privilege of the service that the customer subscribes when the traffic of the service is transmitted on the SP's network.
Service Management Access Protocol
The SMAP is the client side of the SMS. It falls into two types: the central equipment room part, and the business terminal management part. The central equipment room part can implement integrated maintenance operation such as service management, system datasheet management and network configuration management. The business terminal SMAP can provide the management operations specific to the service data.
Serving E-DCH cell
A cell from which the UE receives absolute grants from the NodeB scheduler. A UE has one serving E-DCH cell.
Serving E-DCH RLS or serving RLS
A set of cells that contains at least one serving E-DCH cell and from which the UE can receive one relative grant and combine it with others. The UE has only one serving E-DCH RLS.
Serving GPRS Support Node
The Serving GPRS Support Node keeps track of the location of an individual MS (Mobile Station) and performs security functions and access control. The SGSN also exists in a UMTS network, where it connects to the RNC (Radio Network Controller) over the Iu-PS interface.
Serving Mobile Location Center
The SMLC is either a separate network element or integrated functionality in the BSC (Base Station Controller) that contains the functionality required to support LCS (LoCation Services). The SMLC manages the overall co-ordination and scheduling of resources required for the location of a mobile. It also calculates the final location estimate and estimates the achieved accuracy.
Serving Radio Network Controller
When a RNC (Radio Network Controller) has a RRC (Radio Resource Control) connection with a UE (User Equipment), it is known as the SRNC for that UE. The SRNC is responsible for the users mobility within the UTRAN and is also the point of connection towards the CN (Core Network).
Serving Radio Network System
It provides a connection to UTRAN for each UE. The SRNS is in charge of the radio connection between a UE and the UTRAN.
Session Description Protocol
SDP provides a format for describing the session information such as interfaces where the media must terminate and the type of media formats that can be supported. SDP is normally transported as the message body in the SIP methods already discussed. The structure of the protocol is based around the session and media streams that will be supported in the session. Consequently some of the SDP information relates to the overall session, and is known as session level parameters. This information may include the originator of the session and the time it will commence. The media level parameters on the other hand relate to the individual media streams and include information such as media types, transport protocols and port numbers.
Set of controllable AMR codec modes
The set consists of the AMR codec modes that are contained in the set of supported AMR codec modes and are equal to or larger than the guaranteed bit rate. The modes in this set can be selected by AMRC algorithm.
Set of supported AMR codec modes
The set consists of all the AMR codec modes that can be used for the service transport. The set is decided by the RNC according to the mode set specified by the RAB assignment.
SF
See Spreading Factor
SFN
See System Frame Number
SGSN
See Serving GPRS Support Node
Shared Network Area
A Shared Network Area (SNA) consists of one or more location areas. Different SNAs can be overlapped.
A specified UE can only get services in the SNA that allows that UE to connect. In this situation, the access control for specified UEs can be enabled by the system.
SHO
See Soft HandOver
Short Message Service
The Short Message Service was introduced in the first phase of GSM during 1991 as a simple store and forward text messaging system. Even though nearly all GSM mobile phones were capable of supporting SMS, the take up was very limited as network operators or carriers failed to market the system. However, this has all changed with in excess of 24 Billion text messages being sent each month. A significant proportion of this rapid growth can be attributed to the inclusion of SMS into youth culture. In fact it has introduced a new “text” language to bypass the often awkward text entry or MMI (Man Machine Interface).
SIB
See System Information Block
SIB_POS
System Information Block Position
SID
See Silence Insertion Descriptor
Signal to Interference Ratio
A ratio between the wanted signal power in the channel and the interference in the channel.
Signal-to-Noise Ratio
The SNR or S/N (Signal to Noise Ratio) of the amplitude of the desired signal to the amplitude of noise signals at a given point in time. SNR is expressed as 10 times the logarithm of the power ratio and is usually expressed in dB (Decibel).
Signaling Process Unit
A signaling processing unit is used in producing a prediction signal and comprises three prediction circuits (22, 23, 31) and a selection circuit (24) coupled to the prediction circuits.
Signaling ATM Adaptation Layer
In ATM (Asynchronous Transfer Mode), the "SAAL (ATM Adaptation Layer for Signalling)" provides reliable transport of signalling messages between peer entities. These signalling messages are carried over a PVC (Permanent Virtual Circuit).
Signaling Radio Bearer
The RRC (Radio Resource Control) connection process will establish the RB (Radio Bearer) available for usage by RRC messages on the DCCH (Dedicated Control Channel) and CCCH (Common Control Channel). These Radio Bearers are identified as a SRB (Signalling Radio Bearer).
Silence Insertion Descriptor
A frame that conveys information on the acoustic background noise.
SIM
See Subscriber Identity Module
Simple Mail Transfer Protocol
The TCP/IP (Transmission Control Protocol/Internet Protocol) protocol which facilitates the transfer of electronic-mail messages, specifies how two systems are to interact, and the format of messages used to control the transfer of electronic mail.
Simple Network Management Protocol
Simple Network Management Protocol is part of the TCP/IP suite and is used to control and manage IP gateways and other network functions.
SIR
See Signal to Interference Ratio
SIWF
See The Shared InterWorking Function
SLA
See Service Level Agreement
Small Computer Systems Interface
Small Computer Serial Interface is a standard for computer system communication. Commonly used for storage devices and scanners, SCSI is an ANSI (American National Standards Institute) standard
SMAP
See Service Management Access Protocol
SMLC
See Serving Mobile Location Center
SMS
See Short Message Service
SMTP
See Simple Mail Transfer Protocol
SN
See Sequence number
SNA
See Shared Network Area
SNMP
See Simple Network Management Protocol
SNR
See Signal-to-Noise Ratio
SNTP
Simple Network Time Protocol
Soft HandOver
Soft handover is a category of handover procedures where the radio links are added and abandoned in such manner that the UE always keeps at least one radio link to the UTRAN.
Softer handover
A form of handover applicable to CDMA-based networks where the system hands over from one sector of a base station to another using a different spreading code. As it is less complicated than soft handover it is given the name, softer handover.
Source RNC
RNC initiating an SRNS relocation
Source RNS
RNS initiating an SRNS relocation
Space Time Transmit Diversity
An open loop multi-antenna transmission method adopted in 3G standard. This technique uses the space-time block code at the basestation to combat deep channel fading.
Special Service Connect Orient Protocol
In the ATM (Asynchronous Transfer Mode) signalling layers, SSCOP provides mechanisms for the establishment and release of connections and the reliable exchange of signalling information between signalling entities.
Special Service Coordinate Function
In the ATM (Asynchronous Transfer Mode) signalling layer the SSCF maps the requirements of the layer above to the requirements of SSCOP (Service Specific Connection Oriented Protocol).
Spreading Factor
In a CDMA (Code Division Multiple Access) system, the number of chips per data symbol is called the SF (Spreading Factor). The lower the spreading factor the higher the data rate.
SPU
See Signaling Process Unit
SPUa
RNC Signaling Processing Unit REV:a
SQL
See Structured Query Language
SRB
See Signaling Radio Bearer
SRNC
See Serving Radio Network Controller
SRNS
See Serving Radio Network System
SSCF
See Special Service Coordinate Function
SSCOP
See Special Service Connect Orient Protocol
STM-1
See Synchronous Transport Mode-1
Stream Control Transmission Protocol
Streaming Control Transmission Protocol is a reliable transport protocol operating on top of IP. It provides acknowledged error free non duplicated transfer of data. STCP also detects data corruption, loss of data and duplication of data by using checksums and sequence numbers. A selective retransmission mechanism is applied to correct loss or corruption of the data.
Structured Query Language
A standardized language for defining and manipulating data in a relational database.
STTD
See Space Time Transmit Diversity
Sub-board
A small board attached to the main board to provide certain functions. There are several types of sub-boards: optical sub-board, E1/T1 sub-board, and clock sub-board. Optical sub-board enables access of optical cables. E1/T1 sub-board enables access of E1/T1 cables. Clock sub-board enables access of timing signals.
Subheader
An IPv6 base header, an IPv6 extension header, an IPv4 header, a UDP header, or a TCP header.
Subheader chain
A chain of subheaders.
Subnet
A large network can be divided into a number of smaller networks according to a rule, for example, according to different districts. This facilitates the management of the large network. In the topology view, this type of a smaller network is termed subnet.
Subscriber Identity Module
Usually referred to as a SIM card, the SIM (Subscriber Identity Module) is the user subscription to the mobile network. The SIM contains relevant information that enables access onto the subscripted operator’s network.
Supplementary service
A service which modifies or supplements a basic telecommunication service. Consequently, it cannot be offered to a user as a standalone service. It must be offered together with or in association with a basic telecommunication service. The same supplementary service may be common to a number of basic telecommunication services.
Support
A part used to support and fix a cabinet on the antistatic floor
Switchover
The operation to transfer the control right from one node to another.
The switchover is of two types: the automatic switchover and the manual switchover.
See explanations as follows:
Automatic switchover: When the standby node works properly and the active node remains faulty for more than five minutes, the standby node is automatically switched over to work in the active mode.
Manual switchover: When both the active and the standby nodes work properly, operators can forcibly switch over the nodes.
synchronous digital hierarchy
The SDH is a hierarchical set of digital transport structures, standardized for the transport of suitably adapted payloads over physical transmission networks.
Synchronous Transport Mode-1
Synchronous Transfer Mode at 155 Mbit/s.
System Frame Number
The system frame number is used to uniquely identify a random access.
System Information Block
The system information elements are broadcast in system information blocks. A system information block groups together system information elements of the same nature.
TTandem Free Operation
Tandem Free Operation is the configuration of a connection with two transcoders that support the TFO protocol and whose external coding schemes are compatible, thus enabling compressed speech to pass between them.
Target RNC
RNC serving as the target of SRNS relocation
Target RNS
RNS serving as the target of SRNS relocation
TCA
Traffic Conditioning Agreement
TCP
See Transfer Control Protocol
Telecommunication Management Network
The Telecommunications Management Network is a protocol model defined by ITU-T for managing open systems in a communications network.
Temporary Mobile Subscriber Identity
A temporary mobile station identification assigned by the MSC. It is stored in the VLR and the SIM and used by the MS to originate and receive calls.
TF restriction
A procedure for changing the TFmax of the transport format set based on the rate restriction coefficient.
TF restriction times
The number of attempts that TF restriction can be performed
TFC
See Transport Format Combination
TFCI
See Transport Format Combination Indicator
TFCS
See Transport Format Combination Set
TFI
See Transport Format Indicator
TFO
See Tandem Free Operation
TFRC
Transport Format and Resource Combination
TFRC selection
Selection of an appropriate transport format and resource for the data to be transmitted on HS-DSCH.
The Shared InterWorking Function
Shared InterWorking Function (SIWF) is a network function that provides interworking for data/fax calls. SIWF consists of a SIWF Controller (SIWFC) functionality located in MSCs and SIWF Server(s) (SIWFS) located in the PLMN. An SIWFS contains IWF capabilities. An SIWFS can be accessed by several other network nodes e. g. any MSC in the same PLMN.
THP
Traffic Handling Priority
threshold
The threshold defines the allowable warp range between the actual counter value and the history average value of the counter.
Time Of Arrival
The reference point for signal arrival time, TOA (Time Of Arrival) is defined as the start point of a time slot. Used for LCS (LoCation Services), and similar to E-OTD (Enhanced - Observed Time Difference) in that the time difference of the signal arriving at different base stations is used to calculate the location of a mobile device. The difference between TOA and
E-OTD is that no overlay network is needed for TOA. Mobile networks are currently do not employ these procedures instead cells are synchronized using a common timing reference.
Time Switched Transmit Diversity
Time Switched Transmit Diversity (TSTD) is a technique utilizing multiple transmit stations to originate the downlink signal and improve performance. The transmit station used is determined by a fixed selection pattern similar to frequency hopping.
Timeslot cross function
A function that enables crossing of E1/T1 timeslots on the Physical Medium sublayer of the physical layer so as to provide an exchange path between transport devices. For example, timeslots 2, 3, 4, and 5 can be crossed to timeslots 12, 13, 14, and 15 through this function.
TMN
See Telecommunication Management Network
TMSI
See Temporary Mobile Subscriber Identity
TNL
Transport Network Layer
TOA
See Time Of Arrival
TOW
Time Of Week
TPC
See Transmit Power Control
Transcoder & Rate Adaptor Unit
This is an entity that performs a transcoding function for speech channels and RA (Rate Adaptation) for data channels.
Transfer Control Protocol
The protocol within TCP/IP that governs the breakup of data messages into packets to be sent via IP (Internet Protocol), and the reassembly and verification of the complete messages from packets received by IP.
Transmit Power Control
Transmit Power Control is a technical mechanism used within some networking devices in order to prevent too much unwanted interference between different wireless networks (e.g. the owner's network and the neighbour's network).
Transport Format Combination
A Transport Format Combination is defined as the combination of currently valid Transport Formats on all Transport Channels of an UE, i.e. containing one Transport Format from each Transport Channel.
Transport Format Combination Indicator
A Transport Format Combination Indicator is a representation of the current Transport Format Combination.
Transport Format Combination Set
A Transport Format Combination Set is defined as a set of Transport Format Combinations to be used by an UE.
Transport Format Indicator
A label for a specific Transport Format within a Transport Format Set.
TRAU
See Transcoder & Rate Adaptor Unit
TrFO
Transcoder Free Operation
Triplet, GSM authentication vector
Temporary protocol data of authentication and key ,which enables GSM AKA function for a particular user in a VLR/SGSN. A triplet consists of three elements: Random Number (RAND), Signed Response (SRES), and Ciphering Key (Kc).
TRM
Transmission Resource Management
TSN
Transmission Sequence Number
TSTD
See Time Switched Transmit Diversity
TVM
Traffic Volume Measurement
TX Diversity
Transmit Diversity
UUBR
See Unspecified Bit Rate
UBR+
Unspecified Bit Rate Plus
UDP
See User Datagram Protocol
UDT CES
Unstructured Data Transfer for CES. The data in ATM AAL1 cells are assigned to the 32 E1 timeslots except timeslot 0 and timeslot 16.
UE
See User Equipment
UE tracing
The UE tracing consists of the following two types:
• UE tracing (on the user plane and the signaling plane) This task is performed to trace the call-related information of a specified UE on the signaling plane and on the user plane during a call.
• UE tracing (standard interface) This task is performed to trace signaling messages of a specified UE over Iu, Iur, Iub, and Uu interfaces during a call.
UEA
UMTS Encryption Algorithm
UIA
UMTS Integrity Algorithm
UL
See Uplink
Ultimate rollback point
A point automatically allocated by the system to identify the ultimate state that the configured data can stay.
The ultimate rollback point is applied to only the configuration forward function.
UM
See Unacknowledged Mode
UMTS
See Universal Mobile Telecommunications System/Universal Mobile Telecommunication System/Universal Mobile Telecommunication Services
UMTS security context
A state established between a UE and a serving network domain as a result of the execution of UMTS AKA. In this state, both sides store UMTS security context data. The data consists of at least UMTS CK, IK and key set identifier (KSI). When CK or IK is converted into Kc to work in a GSM BSS, both sides remain in the UMTS security context state.
Unacknowledged Mode
The unacknowledged mode is utilized for transfers of cell broadcast messages or for transfers of certain RRC messages.
UNI
See User-Network Interface
UNI mode
In UNI mode, an ATM cell is directly carried on a E1/T1 and the bits of the ATM cell are sequentially mapped to the valid timeslots on the E1/T1.
Universal Mobile Telecommunications System/Universal Mobile Telecommunication System/Universal Mobile Telecommunication Services
A 3G mobile technology that will deliver broadband information at speeds up to 2Mbit s/sec. Besides voice and data, UMTS will deliver audio and video to wireless devices anywhere in the world through fixed, wireless and satellite systems.
Universal Terrestrial Radio Access Network
UTRAN is a conceptual term identifying that part of the network which consists of RNCs and Node Bs between Iu and Uu interfaces.
Universal Time Coordinates
The basis for coordinated distribution of time signals, counted from 0000 at midnight. When an accuracy better than one second is not required, Universal Time can be used to mean UTC (Coordinated Universal Time).
Unspecified Bit Rate
No commitment to transmission. No feedback to congestion. This type of service is ideal for the transmission of IP datagrams. In case of congestion, UBR cells are discarded, and no feedback or request for slowing down the data rate is delivered to the sender.
UOIa
RNC 4-port ATM/Packet over Unchannelized Optical STM-1/OC-3c Interface unit REV:a
Uplink
An "uplink" is a unidirectional radio link for the transmission of signals from a UE to a base station, from a Mobile Station to a mobile base station or from a mobile base station to a base station.
URA
See UTRAN Registration Area
URA_PCH
An RRC connected mode where neither DCCH nor DTCH is available.
User Datagram Protocol
A communications protocol for the Internet network layer, transport layer, and session layer, which makes it possible to send a datagram message from one computer to an application running in another computer. Like TCP (Transmission Control Protocol), UDP is used with IP (the Internet Protocol). Unlike TCP, UDP is connectionless and does not guarantee reliable communication; the application itself must process any errors and check for reliable delivery.
User Equipment
A device allowing a user access to network services.
User-Network Interface
ATM Forum specification that defines an interoperability standard for the interface between ATM-based products (a router or an ATM switch) located in a private network and the ATM switches located within the public carrier networks. Also used to describe similar connections in Frame Relay networks.
USIM
User Services Identity Module
UTC
See Universal Time Coordinates
UTRAN
See Universal Terrestrial Radio Access Network
UTRAN Registration Area
The UTRAN Registration Area is an area covered by a number of cells. The URA is only internally known in the UTRAN.
Uu Interface
Radio interface between UTRAN and UE
VValue added services
Services other than basic telecommunications service for which additional charges may be incurred, for example, VPMN, VOD, and mobile TV
VCI
See Virtual Channel Identifier
Very Small Aperture Terminal
VSAT is a satellite communications system that serves home and business users.
Virtual Channel Identifier
The identifier in the ATM (Asynchronous Transfer Mode) cell header that identifies to which virtual channel the cell belongs.
Virtual IP Address
The IP address that is used by the active node for the communication between the host and the LMT.
Virtual Path Identifier
The field in the ATM (Asynchronous Transfer Mode) cell header that identifies to which VP (Virtual Path) the cell belongs.
Virtual Private Network
The extension of a private network that encompasses encapsulated, encrypted, and authenticated links across shared or public networks. VPN connections can provide remote access and routed connections to private networks over the Internet.
Visitor Location Register
The Visitor Location Register contains all subscriber data required for call handling and mobility management for mobile subscribers currently located in the area controlled by the VLR.
VLAN
Virtual Local Area Network
VLR
See Visitor Location Register
VPI
See Virtual Path Identifier
VPN
See Virtual Private Network
VSAT
See Very Small Aperture Terminal
WWCDMA
See Wideband CDMA
WGS84
World Geographical System 1984
Wideband CDMA
An ITU (International Telecommunications Union) standard derived from CDMA (Code Division Multiple Access) technology.
Parent topic: GlossaryXXML
See Extensible Markup Language
XRES
The abbreviation of Expected Response. In the UMTS authentication process the network sends RAND (Random Number) to the UMTS Subscriber, XRES is the value that the network is looking for to indicate a positive response.