54944187-gbss13-0-bsc6900-product-description-v1-0-20100730
TRANSCRIPT
GBSS13.0 BSC6900 Product Description
Issue V1.0
Date 2010-07-30
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2010. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior
written consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are the property of Huawei Technologies Co., Ltd. All other
trademarks and trade names mentioned in this document are the property of their respective holders.
Notice
The purchased products, services and features are stipulated by the commercial contract made between
Huawei and the customer. All or partial products, services and features described in this document may
not be within the purchased scope or the usage scope. Unless otherwise agreed by the contract, all
statements, information, and recommendations in this document are provided “AS IS” without warranties,
guarantees or representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute the warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address: Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website: http://www.huawei.com
Email: [email protected]
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Contents
1 Introduction.................................................................................................................................... 4
1.1 Positioning ....................................................................................................................................................... 4
1.2 Benefits ............................................................................................................................................................ 6
2 Architecture .................................................................................................................................... 7
2.1 Overview .......................................................................................................................................................... 7
2.2 Hardware Architecture ..................................................................................................................................... 7
2.3 Software Architecture ..................................................................................................................................... 12
2.4 Reliability ....................................................................................................................................................... 13
3 Configurations ............................................................................................................................. 17
3.1 Overview ........................................................................................................................................................ 17
3.2 Hardware Configuration in BM/TC Combined Mode ................................................................................... 17
3.3 Hardware Configuration in BM/TC Separated Mode .................................................................................... 18
3.4 Hardware Configuration in A over IP Mode .................................................................................................. 19
4 Operation and Maintenance ..................................................................................................... 20
4.1 Overview ........................................................................................................................................................ 20
4.2 Benefits .......................................................................................................................................................... 21
5 Technical Specification .............................................................................................................. 24
5.1 Technical Specifications ................................................................................................................................. 24
5.2 Compliance Standards .................................................................................................................................... 27
6 Acronyms and Abbreviations ................................................................................................... 30
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1 Introduction
1.1 Positioning
This product description is applicable to the BSC6900 V900R013 version.
The rapid development of mobile telecommunications technologies accelerates the upgrading
of wireless products. Global System for Mobile communications (GSM) is developing
towards Enhanced Data rates for Global Evolution (EDGE) and EDGE+ while Universal
Mobile Telecommunications System (UMTS) is evolving into High-Speed Packet Access
(HSPA), HSPA+, and LTE. The operators have to meet challenges of rising operation
expenditure (OPEX), continuous upgrading of GSM products, ever-growing service demands,
and increasingly intense competition. High integration, easy operation and maintenance (OM),
IP transmission, and support of GSM and UMTS of the BSC are concerned widely by the
operators in the industry.
The BSC6900 is an important network element (NE) of Huawei SingleRAN solution. It uses
the industry-leading multiple radio access technologies, IP transmission, and modular design.
It is characterized by high capacity, high integration, high performance, and low power
consumption.
The BSC6900 can be flexibly configured as a BSC6900 GSM, BSC6900 UMTS, or BSC6900
GU as required in different networks. The BSC6900 GSM, in compliance with 3GPP Release
8, operates as an independent NE to access the GSM network, and handles the functionalities
of the Base Station Controller(BSC). With the support for EDGE+, the BSC6900 GSM can be
upgraded to the BSC6900 GU through addition of UMTS boards and software upgrade.
This document describes the BSC6900 in independent mode, that is, the BSC6900 GSM.
Figure 1-1 shows the BSC6900 GSM.
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Figure 1-1 BSC6900 GSM
The BSC6900 GSM supports the star, chain, tree, and ring topologies of the BTS. Figure 1-2
shows the position of the BSC6900 GSM in the network.
Figure 1-2 Position of the BSC6900 GSM in the network
The interfaces between the BSC6900 GSM and each NE in the GSM network are as follows:
Um: the interface between the BTS and the MS
Abis: the interface between the BSC6900 GSM and the BTS
A: the interface between the BSC6900 GSM and the Mobile Switching Center (MSC) or
Media Gateway (MGW)
Gb: the interface between the BSC6900 GSM and the Serving GPRS Support Node
(SGSN)
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The A, Um, and Gb interfaces are standard interfaces, through which equipment from
different vendors can be interconnected.
The main functionalities of the BSC6900 GSM are radio resource management, base station
management, power control, and handover control.
1.2 Benefits
High Integration and Low Cost
The BSC6900 GSM in BM/TC separated mode or A over IP mode supports 4,096 TRXs in a
single cabinet. It caters to the mobile network requirements for higher capacity with fewer
sites, thus requiring less space in the equipment room and reducing the power consumption.
In addition, the BSC6900 GSM supports the simultaneous activation of up to 16,384 PDCHs,
thus meeting the increasing requirements for packet service growth and reducing the cost of
purchasing packet equipment.
Easy Configuration and Convenient Maintenance
The BSC6900 GSM has a small number of board types. In addition to transmission boards,
the BSC6900 GSM cabinet accommodates boards such as network switching boards,
signaling processing boards, and service processing boards. The simplification of board types
reduces the maintenance cost. The interface boards and service boards, not bound together,
are flexible in configuration and easy to maintain and expand.
All-IP Platform Meeting the Varying Needs for Network Evolution
Based on its all-IP platform, the PS service performance of the BSC6900 GSM is improved.
The Abis, A, and Gb interfaces support IP transmission, which provides sufficient bandwidth
and reduces transmission cost. The IP-based platform and interfaces meet the trend of flat
network and the requirements for network evolution.
Smooth Evolution for Investment Protection
The BSC6900 GSM is compatible with the hardware of the BSC6000. Through software
loading, the BSC6000 in the existing network can be upgraded to the BSC6900 GSM. The
BSC6900 GSM can be upgraded to the BSC6900 GU through addition of the UMTS boards
and software upgrade. This facilitates the deployment of UMTS network and protects the
investment of the operator.
Improved Resource Utilization Through GSM/LTE Interoperability
The radio resources and the clock can be shared in GSM-LTE dual mode scenarios, thus
reducing configuration redundancy and resource redundancy. The BSC6900 GSM supports
the evolution from GSM to LTE.
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2 Architecture
2.1 Overview
Based on the all-IP platform, the BSC6900 GSM adopting the TDM/IP dual-plane switching
system meets the varying needs for network evolution. The BSC6900 GSM has a modular
design. The resource utilization and system reliability are enhanced by fully interconnecting
subracks and applying distributed resource pools to manage the service processing units. The
backplane is universal and every slot is common to different types of boards so that different
functions can be performed. In this way, the universality and evolution of the hardware
platform are improved.
The BSC6900 GSM is compatible with the hardware of the BSC6000 in the existing network.
2.2 Hardware Architecture
2.2.1 Cabinets
The BSC6900 GSM uses the standard N68E-22 cabinet. The design complies with the
IEC60297 and IEEE standards.
The BSC6900 GSM cabinet is configured with subracks. In terms of the configured subrack,
the BSC6900 GSM cabinet is classified into main processing rack (MPR), extended
processing rack (EPR), and transcoder rack (TCR), as described in Table 2-1. The subracks
should be configured from the bottom up.
Table 2-1 Classification of BSC6900 GSM cabinets
Cabinet Contained Subracks Configuration Principle
MPR 1 main processing subrack (MPS),
and 0–2 extended processing
subracks (EPSs)
Only one MPR is configured.
EPR 1 EPS Based on the requirement for
traffic capacity, 0–1 EPR is
configured.
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Cabinet Contained Subracks Configuration Principle
TCR 1–3 transcoder subracks (TCSs) In BM/TC separated mode, 1–2
TCRs are configured.
Figure 2-1 BSC6900 GSM cabinet
2.2.2 Subracks
In compliance with the IEC60297 standard, the BSC6900 GSM subrack has a standard width
of 19 inches. The height of each subrack is 12 U. The boards are installed on the front and
rear sides of the backplane, which is positioned in the center of the subrack.
A subrack provides 28 slots. The slots on the front of the subrack are numbered from 0 to 13,
and those on the rear are numbered from 14 to 27.
Figure 2-2 shows the front view and rear view of the subrack.
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Figure 2-2 Front view (left) and rear view (right) of the subrack
The BSC6900 GSM subrack is classified into the MPS, EPS, and TCS. The MPS and the EPS
are generally called the basic module (BM), and the TCS is called transcoder (TC) for short.
Table 2-2 Classification of BSC6900 GSM subracks
Subrack Quantity Functions
MPS 1 The MPS performs centralized switching and provides traffic
paths for other subracks. It also provides the service processing
interface, OM interface, and system clock interface.
EPS 0-3 The EPS performs the functions of user plane processing and
signaling control.
TCS 0-4 The TCS processes CS services by performing the functions of
voice adaptation and code conversion.
The TCS is configured in the TCR only in BM/TC separated mode.
2.2.3 Boards
Table 2-3 lists the hardware version and its corresponding boards.
Table 2-3 Hardware version and its corresponding boards
Hardware Version
Corresponding Board
HW60 R8 OMUb, SCUa, TNUa, GCUa, DPUc, DPUd, XPUa, EIUa, FG2a, GOUa,
OIUa, PEUa
HW69 R11 OMUa, SCUa, TNUa, GCGa, GCUa, DPUc, DPUd, XPUb, EIUa, FG2c,
GOUc, OIUa, PEUa, POUc
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HW69 R13 OMUc, SCUb, TNUa, GCGa, GCUa, DPUf, DPUg, XPUb, EIUa, FG2c,
GOUc, OIUa, PEUa, POUc
The board names that are boldfaced in Table 2-3 indicate that the boards are not included in the previous
hardware version.
Table 2-4 describes the mapping between hardware versions and GBSS versions.
Table 2-4 Mapping between hardware versions and GBSS versions
Hardware Version
BSC6000 BSC6900
GBSS6.1/ GBSS7.0/ GBSS8.0/ GBSS8.1
GBSS9.0 GBSS12.0 GBSS13.0
HW60 R8 Support Support Support Support
HW69 R11 Not Support Support Support Support
HW69 R13 Not Support Not Support Not Support Support
The BSC6900 GSM boards can be classified into the OM board, switching processing board,
clock processing board, signaling processing board, service processing board, and interface
processing board, as described in Table 2-5.
Table 2-5 Classification of BSC6900 GSM boards
Board Type Board Name
Functions
OM board OMUc
Handles configuration management, performance
management, fault management, security management, and
loading management for the BSC6900.
Works as the OM agent for the LMT/M2000 to provide the
BSC6900 OM interface for the LMT/M2000, thus achieving
the communication between the BSC6900 and the
LMT/M2000.
Works as the interface to provide web-based online help.
Differences: The OMUc board occupies only one slot and
supports one hard disk.
Switching
processing
board
SCUb Provides MAC/GE switching and enables the convergence of
ATM and IP networks.
Provides data switching channels.
Provides BSC-level or subrack-level configuration and
maintenance.
Distributes clock signals for the BSC6900.
Differences: The switching capability of the SCUb board is
four times that of the SCUa board.
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Board Type Board Name
Functions
TNUa Provides TDM switching and serves as the center in the circuit
switched domain.
Assigns resources of the TDM network and provides paths for
network establishment within the BSC6900.
Handles communication processing on the GE port.
Clock
processing
board
GCUa Obtains the system clock source, performs the functions of
phase-lock and holdover, and provides clock signals.
Differences: Unlike the GCUa board, the GCGa board can
receive and process the GPS signals.
GCGa
Signaling
processing
board
XPUb Manages user plane and signaling plane resources in the subrack
and processes signaling.
Differences: The processing capability of the XPUb board is
75% to 100% higher than that of the XPUa board.
Service
processing
board
DPUf
Handles GSM speech coding and decoding, converts the speech
frame format over the IP speech channel, and processes speech
services in the system.
Differences: The processing capability of the DPUf board is
twice that of the DPUc board.
DPUg Processes GSM data services.
The processing capability of the DPUg board is the same as that
of the DPUd board.
Interface
processing
board
EIUa Provides 32 E1s/T1s.
Transmits, receives, encodes, and decodes the 32 E1s/T1s.
The E1 transmission rate is 2.048 Mbit/s, and the T1
transmission rate is 1.544 Mbit/s.
OIUa Provides one channel over the STM-1 optical port.
Provides one channelized STM-1 with the rate of 155.52
Mbit/s.
PEUa Provides 32 channels in IP over E1/T1 mode.
Provides 32 E1s/T1s in Gb over FR mode.
Extracts the clock signals and sends the signals to the GCUa
board.
FG2c Provides 12 channels over FE electrical ports or 4 channels
over GE electrical ports.
Supports IP over FE/GE.
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Board Type Board Name
Functions
GOUc Provides four channels over GE optical ports.
Supports IP over GE.
POUc Provides four channels over the channelized optical
STM-1/OC-3 ports based on IP/TDM protocols, equivalent to
252 E1s or 336 T1s.
Extracts the clock signals and sends the signals to the
GCUa/GCGa board.
If operators use Huawei Nastar, operators need to install the SAU board in the BSC6900.
2.3 Software Architecture
The BSC6900 GSM software is designed with a layered architecture. Each layer has
dedicated functions and provides services for other layers. At the same time, the technical
implementation and physical topology of each layer is isolated from other layer. Figure 2-3
shows the software architecture of the BSC6900 GSM.
Figure 2-3 Software architecture of the BSC6900 GSM
Infrastructure
SMP
ICCP
STCP
Application
Table 2-6 describes the functions of each layer in the software architecture.
Table 2-6 Functions of each layer in the BSC6900 GSM software architecture
Layer Functions
Infrastructure Provides the hardware platform and hides the lower-layer hardware
implementations.
Hides the differences for operating systems, and provides enhanced
and supplementary functions for the system.
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Layer Functions
Service
Management
Plane (SMP)
Provides the OM interface to perform the OM functions of the system.
Internal
Communication
Control Plane
(ICCP)
Transfers internal maintenance messages and service control
messages between different processors, thus implementing efficient
control over distributed communication.
Operates independent of the infrastructure layer.
Service Transport
Control Plane
(STCP)
Transports the service data on the user plane and control plane at the
network layer between NEs.
Separates the service transport technology from the radio access
technology and makes the service transport transparent to the
upper-layer service.
Provides service bearer channels.
Application Implements the basic functions of BSC service control and
concentrates on the upper-layer service control, such as call
processing, mobility management, and RRM.
Hides the topology characteristics of various resources in the network
and in the equipment.
Provides the resource access interface, hides the distribution of
internal resources and network resources, maintains the mapping
between the service control and resource instance, and controls the
association between various resources.
Manages the resources and OM status, responds to the resource
request from the upper layer, and hides the resource implementation
from the upper layer.
Isolates the upper-layer services from the hardware platform to
facilitate the hardware development.
2.4 Reliability
The resource pool design and redundancy mechanism are widely used in the system reliability
design of the BSC6900 GSM. The techniques of detecting and isolating the faults in the
boards and in the system are optimized and the software fault tolerance capability is improved
to enhance the system reliability.
2.4.1 System Reliability
The BSC6900 GSM system reliability is designed with the following features:
High reliable architecture design
The design of dual switching planes, with up to 480 Gbit/s GE star non-blocking
switching capability per subrack, solves the bottleneck and single point failure in the
deployment of the high-capacity BSC6900 GSM.
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Moreover, port trunking is adopted on the switching boards. The port trunking function
allows data backup in case of link failure, thus preventing inter-plane switchover and
cascading switchover and improving the reliability of intra-system communication.
Dual clock planes are used in clock transmission between the GCUa and the SCUb. Thus,
a single point of failure does not affect the normal operation of the system clock.
Resource pool design
In case of overload, the system achieves load sharing between the control plane and the
user plane by employing the resource pooling functionality. This effectively avoids
suspension because of overload, thus improving the resource utilization and system
reliability.
Redundancy mechanism
All the hardware in the BSC6900 GSM supports the redundancy mechanism. The rapid
switchover between active and standby parts improves the system reliability. Moreover,
with the quick fault detection and recovery feature, the impact of faults on the service is
minimized.
Flow control
The system performs flow control based on the CPU and memory usage. Thus, the
BSC6900 GSM can continue working by regulating the items pertaining to performance
monitoring, resource auditing, and resource scheduling in the case of CPU overload and
resource congestion. In this way, the system reliability is enhanced.
2.4.2 Hardware Reliability
The BSC6900 GSM hardware reliability is designed with the following features:
The system uses the multi-level cascaded and distributed cluster control mode. Several
CPUs form a cluster processing system. Each module has distinct functions. The
communication channels between modules are based on the backup design or
anti-suspension/breakdown design.
The system uses the redundancy design, as described in Table 2-7, to support hot swap of
boards and backup of boards and ports. Therefore, the system has a strong error tolerance
capability.
Table 2-7 Board redundancy
Boards Redundancy Mode
DPUf/DPUg Board resource pool
EIUa Board redundancy
FG2c Board redundancy + GE/FE port redundancy or load sharing
GCGa/GCUa Board redundancy
GOUc Board redundancy + GE/FE port redundancy or load sharing
OMUc Board redundancy
PEUa Board redundancy
POUc Board redundancy + MSP 1:1 or MSP 1+1 optical port redundancy
SCUb Board redundancy + port trunking on GE ports
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When a pair of boards work in board redundancy mode, the two boards work in the active and standby
states respectively. The active board performs the related functions. The standby board backs up the data
on the active board in real time.
Isolation mechanism is used. When entity A fails to accomplish a task, entity B that has
the same functionalities as entity A takes over the task. Meanwhile, entity A is isolated
until it is restored.
When a board with a single functionality is faulty, the board can be restarted to rectify
the fault.
All boards support dual-BIOS. When one BIOS is faulty, the startup or operation of a
board is not affected.
The system uses the non-volatile memory to store important data.
With advanced integrated circuits, the system is characterized by high integration,
sophisticated technology, and high reliability.
All the parts of the system are of high quality and pass the aging test. The process of
hardware assembly is strictly controlled. These methods ensure the high stability and
reliability for long-term operation.
2.4.3 Software Reliability
The BSC6900 GSM software reliability is designed with the following features:
Scheduled check on crucial resources
The software check mechanism checks various software resources in the system. If
resources are out of service because of software faults, the check mechanism can release
the abnormal resources and generate related logs and alarms.
Task monitoring
When the software is running, internal software faults and some hardware faults can be
monitored through the monitoring process. The monitoring process monitors the task
running status and reports errors to the OM system.
Data check
The digital signature technique is adopted to prevent the software from being tampered
during transmission and storage.
The software performs regular or event-driven data consistency check, restores the data
selectively or preferably, and generates logs and alarms.
Data backup
Both the Back Administration Module and the host board support data backup to ensure
data reliability and consistency.
Operation logs
The system automatically records the history operations into logs. The operation logs
help in identifying and rectifying the faults caused by improper operations.
TNUa Board redundancy
XPUb Board redundancy
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3 Configurations
3.1 Overview
Based on the TCS configuration, the BSC6900 GSM supports three types of configuration
modes, namely, BM/TC combined, BM/TC separated, and A over IP. The BSC6900 GSM is
compatible with all the hardware configuration of the BSC6000 in the existing network. The
BSC6000 can be upgraded to the BSC6900 GSM through software upgrade. If the hardware
configuration does not change, the system specifications remain unchanged.
3.2 Hardware Configuration in BM/TC Combined Mode
In BM/TC combined mode, the BSC is not configured with the TCS. The boards that handle
the TC functionality are installed in the MPS or EPS. With the same capacity, fewer cabinets
and fewer subracks are required in the BSC, thus increasing the hardware integration.
Table 3-1 describes the typical configuration specifications of a single subrack when the
BSC6900 GSM in BM/TC combined mode is configured with the HW69 R13 boards.
Table 3-1 Typical configuration specifications of the BSC6900 GSM (BM/TC combined)
Item 1 MPS 1 MPS + 1 EPS 1 MPS + 2 EPSs
Number of cabinets 1 1 1
Max equivalent BHCA
(k)
1,750 4,375 5,900
Traffic volume (Erl) 6,500 16,250 24,000
Number of TRXs 1,024 2,560 4,096
Number of active
PDCHs (MCS-9)
4,096 10,240 16,384
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3.3 Hardware Configuration in BM/TC Separated Mode
In BM/TC separated mode, the BSC is configured with a separate TCS, which is located in
the TCR on the MSC side. In this manner, the transmission resources between the BSC and
the MSC are saved.
Table 3-2 describes the typical configuration specifications of a single subrack when the
BSC6900 GSM in BM/TC separated and Abis over non-IP mode is configured with the
HW69 R13 boards.
Table 3-2 Typical configuration specifications of the BSC6900 GSM (BM/TC separated and Abis
over non-IP)
Item 1 MPS + 1 TCS
1 MPS + 1 EPS + 2 TCSs
1 MPS + 2EPS + 3 TCSs
Number of cabinets 2 2 2
Max equivalent
BHCA (k)
1,750 4,375 5,900
Traffic volume (Erl) 6,500 16,250 24,000
Number of TRXs 1,024 2,560 4,096
Number of active
PDCHs (MCS-9)
4,069 10,240 16,384
Table 3-3 describes the typical configuration specifications of a single subrack when the
BSC6900 GSM in BM/TC separated and Abis over IP mode is configured with the HW69
R13 boards.
Table 3-3 Typical configuration specifications of the BSC6900 GSM (BM/TC separated and Abis
over IP)
Item 1 MPS + 1 TCS 1 MPS + 1 EPS + 3 TCSs
1 MPS + 2 EPSs + 3 TCSs
Number of cabinets 2 2 2
Max equivalent BHCA
(k)
1,750 5,250 5,900
Traffic volume (Erl) 6,500 19,500 24,000
Number of TRXs 1,024 3,072 4,096
Number of active
PDCHs (MCS-9) 4,096 12,288 16,384
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3.4 Hardware Configuration in A over IP Mode
In A over IP mode, the BSC directly connects to the Huawei core network without using the
TC, thus protecting the operator's investment and improving the voice quality due to the
reduction of encoding and decoding. The A over IP mode meets the needs for network
evolution.
Table 3-4 describes the typical configuration specifications of a single subrack when the
BSC6900 GSM in A over IP mode is configured with the HW69 R13 boards.
Table 3-4 Typical configuration specifications of the BSC6900 GSM (A over IP)
Item 1 MPS 1 MPS + 1 EPS 1 MPS + 2 EPSs
Number of cabinets 1 1 1
Max equivalent BHCA (k) 1,750 5,250 5,900
Traffic volume (Erl) 6,500 19,500 24,000
Number of TRXs 1,024 3,072 4,096
Number of active PDCHs
(MCS-9)
4,096 12,288 16,384
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4 Operation and Maintenance
4.1 Overview
The BSC6900 GSM provides convenient local maintenance and remote maintenance, and it
supports multiple OM modes.
The BSC6900 GSM provides a hardware-independent universal OM mechanism and provides
OM functions such as security management, fault management, alarm management,
equipment management, and software management.
The Man Machine Language (MML) provides OM and configuration functions, and the
Graphic User Interface (GUI) provides the OM functions. The two modes meet the
requirements of different operation environments.
Figure 4-1 shows the OM networking of the BSC6900 GSM.
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Figure 4-1 OM networking of the BSC6900 GSM
The OM system of the BSC6900 GSM adopts the browser/server (B/S) separated mode. The
OMUc board of the BSC6900 GSM works as the server, and the Local Maintenance Terminal
(LMT) is used for local maintenance. The iManager M2000 is the centralized OM system,
which is used for remote maintenance.
The alarm box connects to the LMT and provides audible and visible indications for alarms.
4.2 Benefits
Web-based LMT Improving User Experience
The OM system of the BSC6900 GSM uses the web-based LMT. You can connect the LMT to
the OMUc board to perform OM functions and obtain the online help of the LMT. All the
operation results are displayed on the LMT through the web browser.
Diversified OM Modes
The BSC6900 GSM provides local maintenance and remote maintenance and supports
multiple OM modes.
The LMT used for local maintenance can access the BSC6900 GSM in the following ways:
Through the port on the panel of the OMUc board
Through the Virtual Local Area Network (VLAN)
Through the Intranet or Internet
Alarm Box
VLAN
LMT LMT
iManager M2000
BSC6900 GSM
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The iManager M2000 used for remote maintenance can access the BSC6900 GSM in the
following ways:
Through the VLAN
Through the Intranet or Internet
Powerful Hardware Management Functions for Quickly Locating and Rectifying Hardware Faults
The BSC6900 GSM provides precaution mechanism for hardware fault, thus ensuring that
sufficient time is available to rectify the fault in time before the services are disrupted.
The BSC6900 GSM provides functions such as status query, data configuration, and status
management of the internal physical devices.
When a hardware fault occurs, the BSC6900 GSM alerts the user by generating alarms and
flashing indicators and provides suggestions to guide the user in troubleshooting. The alarm is
cleared upon the rectification of the fault.
The BSC6900 GSM provides the functions of isolating the faulty part, such as activating or
deactivating the faulty part. When a faulty part needs to be replaced, the hot swapping
function enables the quick power-on of the substitute, thus reducing the time in fault
rectification.
In case of emergency, you can reset the board to quickly rectify the fault.
Advanced Software Management Functions for Secure and Smooth Upgrade
The BSC6900 GSM provides the remote upgrade tool, which enables the operator to upgrade
the software at the operation and maintenance center without affecting the ongoing services.
The remote upgrade tool provides the function of backing up the crucial data in the system.
When the upgrade fails, version rollback is performed immediately and the system returns to
normal in a short period.
After the upgrade is complete, version consistency check is performed to ensure the version
correctness.
Rich Tracing and Detection Mechanisms for Reliably Monitoring the Network Status
The BSC6900 GSM provides the tracing and detection functions at different layers and levels
to accurately locate faults. The tracing and detection functions include user tracing, interface
tracing, message tracing, fault detection on the physical layer, fault detection on the data link
layer, and detection of other faults.
The tracing messages are saved as files, which can be viewed through the review tracing
function of the LMT.
Easy Equipment Installation, Commissioning, and Efficient Network Upgrade Scheme for Quick Network Rollout
Before delivery, Huawei BSC6900 GSM is installed with boards, operating system, and
common data. In addition, it is correctly assembled and passes the strict test. You only need
to install the cabinet and cables on site. After the hardware installation is complete, you can
load software and data files to commission the software and hardware.
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The BSC6900 GSM is compatible with the configuration of the BSC6000 in the existing
network. The BSC6000 can be upgraded to the BSC6900 GSM through hardware adjustment
and software upgrade, thus maximizing the resource utilization in the existing network and
reducing the cost of network rollout.
Steady Security Operation Mechanism, Preventing Improper Operations
The BSC6900 GSM provides man-machine interfaces and prompts users to repeatedly
confirm an important operation. This ensures that an operation is performed only when it is
required and prevents service disruptions caused by improper operations.
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5 Technical Specification
5.1 Technical Specifications
5.1.1 Capacity Specifications
Table 5-1 Capacity specifications of the BSC6900 GSM
Item Specification
Max equivalent BHCA (k) 5,900
Traffic volume (Erl) 24,000
Number of TRXs 4,096
Number of configured PDCHs 30,720
Number of active PDCHs (MCS-9) 16,384
Gb interface throughput (Mbit/s) 1,536
The Max equivalent BHCA is the equivalent BHCA under huawei's traffic model, compare with
BHCA (only call and called) the value should be 1440K.
5.1.2 Structural Specifications
Item Specification
Cabinet standard The structural design conforms to the IEC60297
standard and IEEE standard.
Dimensions (height x width x
depth)
2,200 mm x 600 mm x 800 mm
Height of the available space 46 U
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Item Specification
Cabinet weight in full
configuration
≤ 320 kg
Load-bearing capacity of the
floor in the equipment room
≥450kg/m2
5.1.3 Clock Specifications
Item Specification
Clock precision It meets the requirements for the stratum-3 clock.
Clock accuracy ±4.6 x 10-6
Pull-in range ±4.6 x 10-6
Maximum frequency
offset 2 x 10-8/day
Initial maximum
frequency offset 1 x 10-8
5.1.4 Electrical Specifications
Item Sub-Item Specification
Power input Power input –48 V DC
Power range –40 V to –57 V
Power
consumption
Power consumption in a
subrack
MPS:≤1,400 W
EPS:≤1,400 W
TCS:≤1,000 W
Power consumption of a cabinet
in full configuration MPR(BM/TC combined):≤4,200 W
MPR(BM/TC separated):≤ 3,200 W
TCR:≤ 2,400 W
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5.1.5 Space Specifications
Figure 5-1 Space requirements in the equipment room
In overhead cabling mode, the distance between the cabinet top and the ceiling of the
equipment room must be greater than or equal to 1,000 mm.
In underfloor cabling mode, the height of the ESD floor must be greater than or equal to
200 mm.
The spacing shown in Table 5-1 is the minimum possible value. The actual spacing is
wider than that shown in Table 5-1.
5.1.6 Environmental Specifications
Item Specification
Storage Environment
Transportation Environment
Operating Environment
Temperature
range –40ºC to +70ºC –40ºC to +70ºC Long-term: 0ºC to 45ºC
Short-term: –5ºC to +55ºC
Humidity
range
10% RH to 100%
RH
5% RH to 100%
RH
Long-term: 5% RH to 85%
RH
Short-term: 5% RH to 95%
RH
NOTE
Short-term operation refers to the operation with the duration not more than 96 hours at a time and with
the accumulative duration not more than 15 days a year.
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5.1.7 Transmission Ports
Transmission Type Connector
E1/T1 DB44
Channelized STM-1/OC-3 LC/PC
FE RJ45
GE RJ45
LC/PC
5.1.8 Reliability Specifications
Item Specification
System availability > 99.999%
Mean Time Between Failures
(MTBF) ≥ 576,000 hours
Mean Time To Repair (MTTR) ≤ 1 hours
5.2 Compliance Standards
5.2.1 Power Supply Standards
Item Standard
Power supply ETS300 132-2
5.2.2 Grounding Standards
Item Standard
Grounding ETS300 253
5.2.3 Environment Standards
Item Standard
Noise ETS300 753
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Item Standard
GR-63-CORE
5.2.4 Safety Standards
Item Standard
Shock proofing ETS300 019-2-4-AMD
GR-63-CORE
YDN5083
Safety IEC60950, EN60950, UL60950
IEC60825-1
IEC60825-2
IEC60825-6
GB4943
GR-1089-CORE
Surge protection IEC 61024-1 (1993)
IEC 61312-1 (1995)
IEC 61000-4-5 (1995)
ITU-T K.11 (1993)
ITU-T K.27 (1996)
ITU-T K.41 (1998)
EN 300 386 (2000)
GR-1089-CORE (1999)
YDJ 26-89
GB 50057-94
YD5098-2001
5.2.5 EMC Standards
Item Standard
EMC ETSI EN 300 386 V1.3.2 (2003-05)
CISPR 22 (1997)
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Item Standard
IEC61000-4-2
IEC61000-4-3
IEC61000-4-4
IEC61000-4-5
IEC61000-4-6
IEC61000-4-29
GB9254-1998
FCC Part 15
NEBS Bellcore GR-1089-CORE issue 2
5.2.6 Environment Standards
Item Standard Class
Storage environment ETS300 019-1-1 CLASS 1.2
Transportation
environment
ETS300 019-1-2 CLASS 2.3
Operating environment ETS300 019-1-3 CLASS 3.1
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6 Acronyms and Abbreviations
Acronym and Abbreviation Expansion
BHCA Busy Hour Call Attempt
BM Basic Module
CPU Central Processing Unit
DSP Digital Signal Processor
EPS Extended Processing Subrack
FE Fast Ethernet
GE Gigabit Ethernet
GUI Graphic User Interface
ICCP Internal Communication Control Plane
IP Internet Protocol
LMT Local Maintenance Terminal
LVDS Low Voltage Differential Signal
MGW Media Gateway
MML Man Machine Language
MPR Main Processing Rack
MPS Main Processing Subrack
MSP Multiplex Section Protection
MTBF Mean time between failures
MTTR Mean Time To Recovery
OM Operation & Maintenance
OS Operating System
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Acronym and Abbreviation Expansion
PDCH Packet Data Channel
RRM Radio Resource Management
SDH Synchronous Digital Hierarchy
STCP Service Transport Control Plane
SMP Service Management Plane
TC TransCoder
TCR TransCoder Rack
TCS TransCoder Subrack
TDM Time Division Multiplexing
TRX Transceiver
VLAN Virtual Local Area Network