143710264 zxg10 ibsc dimensioning principle

Product Type Technical Description

ZXG10 iBSC Dimensioning Principle



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II 2015ZTE CORPORATION. All rights reserved.ZTE Confidential Proprietary

ZTE Confidential Proprietary 2010 ZTE Corporation. All rights reserved.1(4)

Product Type Technical DescriptionVersionDateAuthorApproved ByRemarks

2015 ZTE Corporation. All rights reserved.ZTE CONFIDENTIAL: This document contains proprietary information of ZTE and is not to be disclosed or used without the prior written permission of ZTE.Due to update and improvement of ZTE products and technologies, information in this document is subjected to change without notice.TABLE OF CONTENTS1Introduction12iBSC Dimension Input22.1Traffic Profile22.2Transmission Type22.3Default Parameters23iBSC Hardware Dimensioning33.1iBSC Product Overview33.2iBSC Hardware Dimension53.2.1Processing Boards63.2.2Interface Boards73.2.3Auxiliary Boards83.3RCBU Configuration Explanation (TC integrated)93.3.1BIU Unit93.3.2TC and AIU unit113.3.3GIU Unit113.4NRCBU Configuration Explanation(TC Remote Located)123.4.1Ater interface124Summary16

FIGURESFigure 1-1 GERAN Dimensioning Process1Figure 3-1 ZXG10 iBSC System Architecture3Figure 3-2 ZXG10 iBSC Capacity Expansion4TABLESTable 2-1 Traffic Model2Table 2-2 Transmission Type2Table 2-3 Default parameters3Table 3-1 ZXG10 iBSC configuration capacity5Table 3-2 Description of Boards Function6Table 3-3 processing capacity of GUP28Table 3-4 the configuration principle of SPB28Table 3-5 ZXG10 iBSC Interface Boards Capacity9Table 3-6 ZXG10 iBSC access capability of Abis/A interface9Table 3-7 ZXG10 iBSC auxiliary Boards Configuration Principle10ZXG10 iBSC Dimensioning Principle


ZTE Confidential Proprietary 2015 ZTE CORPORATION. All rights reserved.15

Document Title

IntroductionThe document describes the dimensioning guidelines for ZTE iBSC and iTC. It provides methodology for ZTE iBSC and iTC, includes Abis/A /Gb/Ater interface dimensioning.The dimensioning follows the process shown in the following figure.Figure 1-1 GERAN Dimensioning Process

DimensioningMethodologyService ProfileTransmission TypeEquipment CapabilityCEquipment ConfigurationThe GERAN Dimensioning needs the inputs of service profile, transmission type and equipment capability. With these inputs, the equipment configuration of iBSC, iTC and each interface board can be calculated based on the methodology introduced in this document.The 2nd chapter introduces traffic service profile which is the dimensioning inputs. These parameters could be divided into two parts, the first table is user plane related inputs, and second one is control plane related inputs.The 3rd chapter is equipment dimensioning, introducing how the iBSC configuration is dimensioned and how the equipment is configured to meet the requirements of the operator.The 4th chapter is iTC equipment dimensioning, introducing how the iTC configuration is dimensioned and how the equipment is configured to meet the requirements of the operator.iBSC Dimension InputTraffic ProfileThe GERAN Dimensioning is based on the Traffic Profile from the Operator. The following is the minimum requirements for the iBSC dimensioning, and can be considered as the input of the dimensioning.Table 2-1 Traffic ModelParameters provided by operatorsValue

CS call service (Erl)

TRX Number

PS throughput (Mbps)

PDTCH Number

Cell Number

iBSC Number

BTS Number

Transmission TypeAccording to the requirement of operator, the transmission interface type for iBSC is listed in the table below:Table 2-2 Transmission TypeItemValue

Abis Interface

A Interface

Ater Interface

Gb Interface

Default ParametersThe parameters mentioned here always could be provided by operators,if we do not have these materials, our default parameters can be set as below:Table 2-3 Default parametersDefault ParametersDefault Value

The average busy hour Traffic0.025

A Interface GOS0.001

Ratio of FR100%

Ratio of HR0%

Ratio of EDGE50%

Ratio of GPRS50%

Ratio of simultaneity usable Dynamic PDTCH80%

Average Rate of GPRS0.25kbps

Average Rate of EDGE0.3kbps

iBSC Hardware DimensioningiBSC Product OverviewThe iBSC system is built in a standard 19-inch cabinet, and the dimension of height* width* depth is 2000* 600* 800 (mm). The system architecture of iBSC is shown as the following figure:Figure 3-1 ZXG10 iBSC System Architecture ZXG10 iBSC provides three types of shelves. With different functions, the shelves are named as Control Shelf, Switch Shelf, and Resource Shelf.Control Shelf: responsible for the control plane processing, O&M processing and clocking. The Control Shelf includes OMP, CMP, CLKG, UIMC, SBCX, CHUB boards etc.Resource Shelf: responsible for the user plane processing and interface accessing, includes DTB, SPB2, SDTB2, GUP2, GUIM boards etc.Switch Shelf: provides packet switch platform and supports several Resource Shelf user-plane expansion. The Switch Shelf includes GLI, PSN and UIMC boards etc.It is easy for shelf expansion according to the traffic increase, which is shown in the following figure:Figure 3-2 ZXG10 iBSC Capacity Expansion

Switch shelfL4Resource shelfL3Control shelfL2Resource shelfL1Cabinet1 Resource shelfSwitch shelfL4L3Control shelfL2Resource shelfL1Cabinet1Resource shelfL4L3L2Resource shelfL1Cabinet2 Resource shelfResource shelfSwitch shelfL4L3Control shelfL2Resource shelfL1Cabinet1Resource shelfResource shelfL4L3L2Resource shelfL1Cabinet2From figure3, there are three kinds of configuration of iBSC, one pair, two pairs and three pairs of resource shelf, they can support different number of TRX. And with different interfaces, each of them also has different capacity. The capacity of one rack and two racks in full configuration is shown in the following figure:Table 3-1 ZXG10 iBSC configuration capacityA InterfaceE1(T1) ASTM-1 AIP A

Abis Interface

E1(T1) AbisOne rack TRX102410241024

Two racks TRX307230723072

STM_1 AbisOne rack TRX102410241024


IP AbisOne rack TRX102415362048


IPoE1 Abis(DTB Interface)One rack TRX102410241024


IPoE1 Abis(SDTB2 Interface)One rack TRX\10241024

Two racks TRX\30723072

iBSC Hardware DimensionAll the boards of iBSC are shown in the following table:Table 3-2 Description of Boards FunctionBoardFull NameFunctionBackup Principle

UIMCUniversal Interface Module for Control Plane Switching of data and signaling1+1

CMPControl Main Processor CS/PS Service Control1+1

CHUBControl HUB Switching of data and signaling1+1

OMPOperation Main Processor O&M processor, Connects with NetNumen-M311+1

SBCXSingle Board Computer of X86 Database for OMP

CLKGClock Generation Clock generation and distribution1+1

ICMIntegrated Clock ModuleClock generation with GPS1+1

GLIGigabit Line Interface connect with the BGSN shelfLoad sharing

PSNPacket Switch Network Primary switching functionLoad sharing

SPB2Signal Processing BoardSignal Processing and 16 E1 for Gb, 14 for A,8 E1 for Abis 1+1 at Abis interfaceLoad sharing at other interface

GUIMGiga bit User Interface Module Complete the Ethernet switch and TDM switch function between user and control plane1+1

GUP2GSM Universal Processing TC, PCU, or RTP processingN+1 for each resource shelf at Abis interfaceResource pool at A and Gb interface

DTBDigital Trunk Board 32 E1/T1 digital trunk

SDTB2Sonet Digital Trunk Board 2 Provide 2 STM-11+1

GIPIGE IP InterfaceProvide 4 FE or 1 GE for IP access in Abis, A & GbLoad sharing at Gb interface1+1 at Abis and A interfaces

EIPIE1(T1) IP InterfaceEach EIPI supports 64 E1 TDM-IP transitions1+1

According to the function, there are three kinds of iBSC boards, including processing boards, interface boards and auxiliary boards.Processing boards are the most important part in iBSC, which is responsible for the control plane processing and user plane processing. Interface boards are responsible for the transmission interface and protocol processing. Auxiliary boards provide system control, data switch, system operation and maintenance.Processing BoardsThere are three types of processing boards: CMP, GUP2, and SPB2.CMP is Control Main Processor, responsible for the Control plane processing.GUP2 is GSM Universal Processing board, used for user plane processing.SPB2 is Signaling Processing Board, used for processing singling plane data.They are dimensioned based on following factors:1.TRX number2.CS call service (Erl)3.Cell number4.PDTCH number5.PS throughput (Mbps)Each CMP supports 1024 TRX&5000Erl&512Cell processing capacity and is deployed with 1+1 backup;GUP2 can be configured in A/Abis/Gb/Ater interface. For different interface and different transmission type,Different processing capacity of GUP2 is shown in the following table:Table 3-3 processing capacity of GUP2GUP2TDM AbisIP/IPoE1 AbisTDM A/AterIP AGb

Processing Ability392TRX512TRX1500TC6090 channel300cell,6000*16Kchannel,96Mbps

SPB2 can be configured at A/Ater/Abis interface to process singling plane data when the transmission type of these interfaces is TDM mode. The following table shows the configuration principle of SPB2.Table 3-4 the configuration principle of SPB2SPB2TDM AbisTDM A/Ater

ConfigurationCeiling(Number Cell/512,1)*22 pieces

Interface BoardsZXG10 iBSC can provide abundant transmission interface to meet the operators requirement, such as E1, STM-1, IPoE1, FE and GE, etc.DTB is used to provide E1 interface.SDTB2 is used to provide STM-1 interfaces.GIPI is used to provide FE/GE interfaces.The limitation factor for transmission interface board is listed in the following table:Table 3-5 ZXG10 iBSC Interface Boards CapacityInterface BoardLimitation Factor

DTB32 E1

SDTB22 STM-1

GIPI1 GE/4 FE

With different capacity of iBSC, interface board decides the access capability of interface. The table below shows the access capability of Abis/A interface.Table 3-6 ZXG10 iBSC access capability of Abis/A interfaceA InterfaceE1(T1) ASTM-1 AIP A

Abis Interface

E1(T1) AbisOne rack Abis208 E1(T1)208 E1(T1)208 E1(T1)

One rack A188E1(T1)4 pairs of STM-12 pairs of GE

Two racks Abis624 E1(T1)624 E1(T1)624 E1(T1)

Two racks A508E1(T1)12 pairs of STM-12 pairs of GE

STM_1 AbisOne rack Abis4 pairs of STM-14 pairs of STM-14 pairs of STM-1

One rack A188 E1(T1)4 pairs of STM-12 pairs of GE

Two racks Abis12 pairs of STM-112 pairs of STM-112 pairs of STM-1

Two racks A508 E1(T1)10 pairs of STM-12 pairs of GE

IP AbisOne rack Abis1 pair of GE1 pair of GE1 pair of GE


Two racks Abis2 pairs of GE2 pairs of GE2 pairs of GE


IPoE1 AbisDTB InterfaceOne rack Abis160 E1(T1)160 E1(T1)160 E1(T1)


Two racks Abis480 E1(T1)480 E1(T1)480 E1(T1)


IPoE1AbisSDTB2 InterfaceOne rack Abis\4 pairs of STM-14 pairs of STM-1

One rack A\4 pairs of STM-12 pairs of GE

Two racks Abis\12 pairs of STM-112 pairs of STM-1

Two racks A\10 pairs of STM-12 pairs of GE

Auxiliary BoardsThere are some boards used to provide the system control, data switch, system operation, maintenance, and so on.OMP is used to monitor and manage all of the boards in the system, and to implement the general processing of the system and route protocol management.SBCX provides the operation and maintenance management agent functionality.CLKG board is responsible for the clock supply and external synchronization.CHUB is for control plane data switching among different shelves.UIMC is for the switching function of control plane processing boards, and clock distribution. Information switching of UIMC boards in different shelves is implemented by CHUB.GUIM is for the switching function of user plane processing boards. Information switching of GUIM boards in different shelves is implemented by GLI and PSN.GLI and PSN are used for user plane data switching among different resource shelves.Table 3-7 ZXG10 iBSC auxiliary Boards Configuration PrincipleBoard NameDimension Principle

OMP2 pieces per iBSC.

SBCX1 or 2 pieces per iBSC

CLKG2 pieces per iBSC

CHUB2 pieces per iBSC

UIMC2 pieces per Control Shelf or Switch Shelf

GUIM2 pieces per Resource Shelf

GIPI2 pieces for OMCB

GLI2 pieces for every 2 Resource Shelves

PSN2 pieces per iBSC

RCBU Configuration Explanation (TC integrated)AIU(A interface unit)BIU(Abis interface unit)GIU(Gb Interface Unit) are made up of resource shelves; Two resource shelves are one basic configuration unit (Resource Configuration Basal Unit - RCBU); in the future expansion, just RCBU is needed to be added; two racks support 3 RCBU in full configuration;There are some basic principles in RCBU configuration, the explanation is as the following:BIU UnitBIU realizes the function of Abis interface access, supports TDM, IP over E1 and IP access modes, and is composed of DTB/SDTB2/EIPI/GIPI, GUP2 and SPB2 boards.1.TDM mode:Each DTB provides 32 E1 interface as Abis over E1.Each SDTB2 provides 2 STM-1 interface as Abis over STM-1.SPB2 processes LAPD links in Abis interface, Each SPB2 processes 512 LAPD links, and provides 8 E1 interface.GUP2 transforms between TDM packets and IP packets. Each GUP2 supports 392 TRX, and supports N+1 backup of each resource shelf.2.IP over E1 mode:Each DTB provides 32 E1 interface as Abis over E1.Each SDTB2 provides 2 STM-1 interface as Abis over STM-1.Each GUP2 supports 512 TRX.Each EIPI supports 64 E1 TDM-IP transitions.3.IP mode:Interface board adopts GIPI as Abis over GE, Considered that one GIPI supports 2048 TRX.Boards configuration steps:1.Determine the kinds of interface boards according to the Abis bearing mode. The number of E1 is NE1-Abis, the number of TRX is NTRX.2.Determination of the number of SPB2(NSPB2)NSPB2 = Ceiling(Ncell /512,1)*2;Notes: Each SPB2 processes 512 LAPD when Abis adopts TDM transmission. The minimum number of SPB2 in each RCBU is 2.3. Determination of the number of DTB(NDTB);NDTB = Ceiling (NE1-Abis /32,1);4.Determination of the number of SDTB2(NSDTB2);NSDTB2= Ceiling ((NE1-Abis)/126,1);Notes: Each SDTB2 provides 2 STM-1.5.Determination of the number of EIPI(NEIPI);NEIPI= Ceiling(NDTB/2,1)*2;Notes: Each EIPI supports 64 E1 TDM-IP transitions which accessed by 2 DTB boards.6.Determination of the number of GIPI(NGIPI)NGIPI= Ceiling (NTRX /2048,1);Notes: Each GIPI supports 2048TRX at Abis interface.7.Determination of the number of NGUP2(NGUP2);TDM: NGUP2= Ceiling (NTRX /392,1);IPoE1/IP: NGUP2= Ceiling (NTRX /512,1);Notes: GUP2 supports N+1 backup of each resource shelf at Abis interface.TC and AIU unitTC and AIU mainly includes TC resource, relay circuit resource and No.7 signaling processing functions, which consist of DTB/SDTB2, SPB2 and GUP2 boards, supports TDM and IP access.DTB board provides 32 E1 interface, SPB2 board provides 14 E1 interface, and SDTB2 board provides 2 STM-1 interfaces. One pair of GIPI supports 7500Erl when IP access.Boards configuration steps:1.Determine the kinds of interface boards according to the A bearing mode. NE1-A is the number of E1 at A interface; NA-TC, is the number of TC, calculated according to traffic mode.2.Determination of the number of SPB2(NSPB2): 2 pieces;Notes: SPB2 at A interface is used for 7 signaling, configure one pair at A interface.3.Determination of the number of DTB(NDTB);NDTB = Ceiling (NE1-A /32,1);NSDTB2 = Ceiling (NE1-A/63,1)*2;NE1= NA-TC /31;Notes: Each SPB2 provides 14 E1, and each DTB provides 32 E1. If STM-1 is needed, DTB can be replaced by SDTB2, and the capacity of one STM-1 is equal to the capacity of 63 E1; SDTB2 board supports 1+1 backup.4.Determination of the number of NGUP2(NGUP2);TDM: NGUP2= NA-TC/1500;IP: NGUP2= NA-TC/6090.GIU UnitGb interface in GIU support E1 and GE circuit port, E1 bearing mode is realized in SPB2, each of which supports 32Mbps data throughputs; GE bearing mode is realized in GIPI, each of which supports 600Mbps data throughputs.Boards configuration steps:1.NPS, the data throughputs of Gb interface, is calculated according to traffic model; Ncell is the number of cell; N16K is the number of 16K time slot.2.Determination of the number of SPB2(NSPB2):NSPB2 = Ceiling (NPS /32,1);Notes: Each SPB2 provides 32M processing capacity, if Gb interface adopts E1 bearing mode.3.Determination of the number of GIPI(NGIPI):NGIPI = Ceiling (NPS /600,1)*2;Notes: Each GIPI provides 600M processing capacity, if Gb interface adopts GE bearing mode.4. Determination of the number of GUP2 (NGUP2):NGUP2-1=Ceiling (Ncell/300,1);NGUP2-2= Ceiling (N16K/6000,1));NGUP2-3= Ceiling (NPS/96,1);NGUP2=Max (NGUP2-1, NGUP2-2, NGUP2-3)Notes: Each GUP2 processes 96Mbps Gb interface throughputs, 300 cells, and 6000 16K time slots.NRCBU Configuration Explanation(TC Remote Located)Ater interface, BIU(Abis interface unit), GIU(Gb Interface Unit) are made up of resource shelves; Two resource shelves are one basic configuration unit (Near Resource Configuration Basal Unit - NRCBU); in the future expansion, just NRCBU is needed to be added; two racks support 3 NRCBU in full configuration;There are some basic principles in NRCBU configuration and the configurations of BIU and GIU is the same as RCBU, so now only explain Ater interface configuration principle as the following:Ater interfaceAter interface supports TDM access mode, and is composed of DTB/SDTB2, GUP2 and SPB2 boards.1. TDM mode:Each DTB provides 32 E1 interface as Abis over E1.Each SDTB2 provides 2 STM-1 interface as Abis over STM-1.SPB2 processes NO.7 links at Ater interface, and provides 14 E1 interface.GUP2 transforms between TDM packets and IP packets. Each GUP2 supports 3360 voice channel with FR in Ater interface, 4200 voice channel with HR.

SummaryThis document is a dimensioning document. It defines the input for the dimensioning of interface of iBSC, and defines the dimensioning methodology of iBSC.In order to do the dimensioning for the of iBSC, the first steps is to analysis the traffic profile, for some uncertain traffic parameter, assumption is necessary, to set reasonable values for the dimensioning methodology, and then use the dimensioning methodology to calculate the of iBSC configuration.1ZTE Confidential Proprietary

14 2015ZTE CORPORATION. All rights reserved.ZTE Confidential Proprietary

143710264 zxg10 ibsc dimensioning principle

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