ZTE Confidential ZXC10-BSC Sub-System

ZTE Confidential Lesson Objectives: General Study HIRS:High-speed Interconnection Routing Subsystem SVBS:Selector Vocoder Bank Subsystem PCFS:Packet Control Function Subsystem CPS:Call Processing Subsystem CDSUS:Channel Data Service Unit Subsystem TS:Timing Subsystem Subsystems of BSC

ZTE Confidential General Study BSC working environment requirement Working temperature: 0 ° C ~+55 ° C Working humidity: 15%~93% The density of dust in the equipment room with diameters of over 5μm should be ≤3*10 4 granules/m 3. Power requirement BSC DC power 1)Voltage amplitude: The nominal voltage value of the BSC power supplied by the power equipment in the equipment room is -48V. The permitted variation range is -57V~-40V. 2)The noise level index contained in the DC power voltage should satisfy the requirement in the overall technical specifications by the former MPT. 3)DC power should provide over-voltage BSC working environment requirement Working temperature: 0 ° C ~+55 ° C Working humidity: 15%~93% The density of dust in the equipment room with diameters of over 5μm should be ≤3*10 4 granules/m 3. Power requirement BSC DC power 1)Voltage amplitude: The nominal voltage value of the BSC power supplied by the power equipment in the equipment room is -48V. The permitted variation range is -57V~-40V. 2)The noise level index contained in the DC power voltage should satisfy the requirement in the overall technical specifications by the former MPT. 3)DC power should provide over-voltage

ZTE Confidential BSC Mechanical Structure --Center Rack HIRS CDSUS CPS TS

ZTE Confidential BSC Mechanical Structure --Vocoder Rack SVBS or PCFS

ZTE Confidential Mechanical Features BSC comprises the central rack and the vocoder rack. The central rack and the vocoder rack adopts the unified racks and standard plug-in boxes, which provide different functions due to the use of different plug-in unis. External dimensions of the rack (main body) (H*W*D): 2000 mm*810 mm*600 mm Outline dimensions of rack (after installation of top shelf and side board) (H×W×D): 2200mm×870mm×600mm From top to bottom, each rack includes one distribution plug-in box, 3~5 functional plug-in boxes, one fan plug-in box, and dust-proof shelf. There are three types of functional plug-in boxes. BSC comprises the central rack and the vocoder rack. The central rack and the vocoder rack adopts the unified racks and standard plug-in boxes, which provide different functions due to the use of different plug-in unis. External dimensions of the rack (main body) (H*W*D): 2000 mm*810 mm*600 mm Outline dimensions of rack (after installation of top shelf and side board) (H×W×D): 2200mm×870mm×600mm From top to bottom, each rack includes one distribution plug-in box, 3~5 functional plug-in boxes, one fan plug-in box, and dust-proof shelf. There are three types of functional plug-in boxes.

ZTE Confidential HIRS Subsystem is switching center and packet data exchange platform of BSC. Functions of HIRS ： Packet data switching Timing distribution ， monitor GPS Software downloading Operation and maintenance management on the whole BSS HIRS Subsystem is switching center and packet data exchange platform of BSC. Functions of HIRS ： Packet data switching Timing distribution ， monitor GPS Software downloading Operation and maintenance management on the whole BSS HIRS

ZTE Confidential HIRS Shelf Structure PSMBPSMB NIMNIM NIMNIM NIMNIM NIMNIM NIMNIM NIMNIM NIMNIM NIMNIM NIMNIM NCMNCM NCMNCM NIMNIM NIMNIM NIMNIM NIMNIM NIMNIM NIMNIM NIMNIM NIMNIM NIMNIM NIMNIM NIMNIM PSMBPSMB NCM: Network Control Module NIM: Network Interface Module PSMB ： Power Supply Module

ZTE Confidential Input and Output interface Operate and maintain interface HIRS Subsystem RS422 interface Clock interface

ZTE Confidential NCM is the core module in HIRS shelf When NCM is in slot 11,it must connect with port 6 of NIM in slot 9 via the internal serial bus on backplane. When NCM is in slot 12,it must connect with port 6 of NIM in slot 14 via the internal serial bus on backplane. 2 NCM working mode: active and standby NCM is the core module in HIRS shelf When NCM is in slot 11,it must connect with port 6 of NIM in slot 9 via the internal serial bus on backplane. When NCM is in slot 12,it must connect with port 6 of NIM in slot 14 via the internal serial bus on backplane. 2 NCM working mode: active and standby NCM

ZTE Confidential Major functions of NCM : Gateway function:data receiving of CO bus and distribution of DIS bus,routing of data frame inside/outside of the local shelf Distribution of software of respective modules and configuration information; Fault detection, isolation, report and recovery in HIRS network; GPS clock distribution; Serving as the foreground PC of BSM to communicate with the background through 10/100Mbps Ethernet Major functions of NCM : Gateway function:data receiving of CO bus and distribution of DIS bus,routing of data frame inside/outside of the local shelf Distribution of software of respective modules and configuration information; Fault detection, isolation, report and recovery in HIRS network; GPS clock distribution; Serving as the foreground PC of BSM to communicate with the background through 10/100Mbps Ethernet NCM Functions

ZTE Confidential NCM Panel Indicator&Interface` Indicator: RUN:when module normal running,it quick flash ALM:OFF indicates no fault ACT:Active/Standby State Interface: TEST:Network interface,for debugging but not connected in operations RS-232:serial port, for debugging but not connected in operations RST:Manual resetting on boards M/S:Manual Switching active/standby mode on the foreground

ZTE Confidential Receive/send RS-422 serial data Receive/send data through DISCO 8 ＋ 1 redundancy Clock receiving and distributing Reports module working states to NCM via I 2 C bus and accepts NCM control NIM Functions

ZTE Confidential N C M N C M ０ Node address 10 Port Number Slot No. NIM Standby Configuration Direction Network address distribution

ZTE Confidential CPM Network Address BSSId = X ， SubNetId = 0 ， NodeId = 7 ， PortId = 7 ； NCM Network Address BSSId = X ， SubNetId = 0 ， NodeId = 7 ， PortId = 6 ； Network address distribution(Cont.)

ZTE Confidential NIM daisy chain NIM :8 working + 1 standby and changeover N I M N C M N I M 7 backup 1415 backup

ZTE Confidential NIM Panel Indicator NIM RUN ALM ACT RST RUN: A green indicator, blinking when the board works normally. ALM: A red indicator, lighting up or blinking in case of board failure. ACT: A green indicator, lighting up when the board is in master mode. RST: Reset button.

ZTE Confidential SVBS--Selector/Vocoder Band Subsystem SVBS is the core part for enabling voice services and supporting SS7 signaling MTP1 and MTP2. Judge and implement soft handoff: select a path in several soft handoff path by the quality for code type conversion Code type conversion function: It enables the conversion between 64K PCM codes and variable rate of QCELP codes; Enables echo cancellation for PCM data on the forward link Power control Signaling handle SVBS is the core part for enabling voice services and supporting SS7 signaling MTP1 and MTP2. Judge and implement soft handoff: select a path in several soft handoff path by the quality for code type conversion Code type conversion function: It enables the conversion between 64K PCM codes and variable rate of QCELP codes; Enables echo cancellation for PCM data on the forward link Power control Signaling handle

ZTE Confidential SVBS Shelf Structure PSMBPSMB SVMSVM SVMSVM SVMSVM SVMSVM SVMSVM SVMSVM SVMSVM SVMSVM SVICMSVICM SVICMSVICM SVMSVM SVMSVM SVMSVM SVMSVM SVMSVM SVMSVM SVMSVM SVMSVM PSMBPSMB SVICM: Selector Vocoder Interface Control Module SVM: Selector Vocoder Module PSMB ： Power Supply Module SVICM: Selector Vocoder Interface Control Module SVM: Selector Vocoder Module PSMB ： Power Supply Module

ZTE Confidential Input and Output interface 4*E1 interfaces connected with MSC SVBS Subsystem Connected with NIM via RS422 port

ZTE Confidential SVICM Functions  S-HIRS:Communicate with HIRS Network Distribute forward traffic and signaling （ SVM  SVICM  NIM ） Distribute reverse traffic and signaling (SVM  SVICM  NIM ） Distribute signaling interior SVBS （ SVM  SVICM ）  Receive and Distribute Clock and TOD message  Manage and control SVM  Signaling handling  Code type conversion between MSC and BSS via DTI

ZTE Confidential NIM SVICM U gateway SVC SVM 1 SVM 7 SVM 8 CO DIS C_BUS SVBS DTI MSC 时钟 I 2 C Clock distribution RS422 4*E1 4*HW Structure of SVICM

ZTE Confidential SVICM Panel Indicator RUN: Running indicator (green), blinking during operation; ALARM: Alarm indicator (red), lighting up when a software error occurs; DT0: 1st E1 connection indicator, lighting up to indicate that the E1 link is connects; DT1: 2nd E1 connection indicator, lighting up to indicate that the E1 link is connects; DT2: 3rd E1 connection indicator, lighting up to indicate that the E1 link is connects; DT3: 4th E1 connection indicator, lighting up to indicate that the E1 link is connects; RST: Reset button.

ZTE Confidential transcoding between PCM and QCELP reverse outer-loop power control soft handoff handle layer 3 of Abis interface and layer 2 of IS-95 signaling assign the timeslot SVM － Selector & Vocoder Module

ZTE Confidential  A SVM contain 1 SVP and 15 SVEs.  SVICM receive traffic data from the RS-422 port of NIM then forward to SVM,SVP forward to SVE,SVE transcoding to PCM and send through HW,in other direction,SVE transcoding PCM to QCELP or EVRC,then send to SVP,then to SVICM,and then NIM. Structure of SVM HW interface SVE1 SVE2 SVE15 Data Interface maintenance bus clock interface SVP

ZTE Confidential SVM Panel Indicator RUN: Running indicator (green), blinking during working normally; ALARM: Alarm indicator (red), lighting up when a software error occurs; RESET: Reset button.

ZTE Confidential PCFS-Packet Control Function Subsystem Each BSC can support 10 PCFS subsystems. Each PCFS subsystem comprises 1 PCFIM board and 8 PCF boards. Each PCFS subsystem is connected with the PDSN via PCFIM board, and provides a 10M/100M self-adaptive physical Ethernet interface through the PCFIM board. Each PCFS subsystem can carry 4000 PPP connections (Dormant+Active), and 240 activated PPP connections (total number of active ones). Each BSC can support 10 PCFS subsystems. Each PCFS subsystem comprises 1 PCFIM board and 8 PCF boards. Each PCFS subsystem is connected with the PDSN via PCFIM board, and provides a 10M/100M self-adaptive physical Ethernet interface through the PCFIM board. Each PCFS subsystem can carry 4000 PPP connections (Dormant+Active), and 240 activated PPP connections (total number of active ones).

ZTE Confidential PCFS Functions To Select a service path with best quality among multiple soft handover paths for data GRE encapsulation. Enables adaptation between GRE data packets and RLP data packets;. To establish, configure and maintain A8 and A10 links via A9 and A11 interfaces. To establish PPP link between MS and PDSN to enable packet data service transmission. To Select a service path with best quality among multiple soft handover paths for data GRE encapsulation. Enables adaptation between GRE data packets and RLP data packets;. To establish, configure and maintain A8 and A10 links via A9 and A11 interfaces. To establish PPP link between MS and PDSN to enable packet data service transmission.

ZTE Confidential PCFS Shelf Structure

ZTE Confidential Input and Output Interface PCFS provides a 10M/100M fast Ethernet interface to be connected with PDSN. PCFS provides a RS422-port to be connected with HIRS switching network. PCFS provides a 10M/100M fast Ethernet interface to be connected with PDSN. PCFS provides a RS422-port to be connected with HIRS switching network.

ZTE Confidential CPS is a joint point of BSS system’s resource management and call signaling protocol processing. CPS comprises two modules:CPM and PAM. CPS is a joint point of BSS system’s resource management and call signaling protocol processing. CPS comprises two modules:CPM and PAM. CPS- Call Processing Subsystem

ZTE Confidential CPS Board PSMBPSMB CDSUCDSU CDSUCDSU CDSUCDSU CDSUCDSU CDSUCDSU CDSUCDSU CDSUCDSU CDSUCDSU CDSUCDSU CDSUCDSU CDSUCDSU CDSUCDSU CPMCPM CPMCPM PAMPAM GPSTMGPSTM TCMTCM GPSTMGPSTM PSMBPSMB

ZTE Confidential Handle the signaling of Abis interface Radio resource maintenance,management and distribution Trunk resource management provides A signaling interface. It fulfills A interface startup and re-startup, A interface protective switching, activation of failing data link, control of link labels, and delivery of A messages. Control over loading of BSS;produce the message of A and ABIS interface:establish the signaling link to CCM and SVICM Manage the database of BSS,include the parameters of BSS system,ground circuit resource,traffic channel resource,calling record,performances record,handoff record and so on. Handle the signaling of Abis interface Radio resource maintenance,management and distribution Trunk resource management provides A signaling interface. It fulfills A interface startup and re-startup, A interface protective switching, activation of failing data link, control of link labels, and delivery of A messages. Control over loading of BSS;produce the message of A and ABIS interface:establish the signaling link to CCM and SVICM Manage the database of BSS,include the parameters of BSS system,ground circuit resource,traffic channel resource,calling record,performances record,handoff record and so on. CPS Functions

ZTE Confidential Input and Output interface of CPS CPS Subsystem NIM 7 port RS422RS485 Alarm box RS485 Connect to power modules of seven racks

ZTE Confidential Hardware feature of CPM According to the software function of CPM,CPM should have the Hardware features below ： CPS sub-system is a joint point of BSS system’s resource management and call signaling protocol processing,processing all the signaling,so the CPM should be powerful. The CPM is 1+1 hot standby According to the software function of CPM,CPM should have the Hardware features below ： CPS sub-system is a joint point of BSS system’s resource management and call signaling protocol processing,processing all the signaling,so the CPM should be powerful. The CPM is 1+1 hot standby

ZTE Confidential CPM Panel RUN:running indication ALM:error status indication ACT:green,active status indication M/S:active/standby switch RST:reset TEST1:Ethernet debugging interface

ZTE Confidential PAM Functions monitor the running status of the power supply modules in the BSC-side frames and the equipment room environment signals, including temperature, humidity, smoke, and so on. report the result to the background operation and maintenance console through the NCM for processing; provides duplex RS232 and RS485 interfaces for the connection of external monitoring devices and alarm box.

ZTE Confidential CDSUS --Channel Data Service Unit Subsystem 1.Convert signal between RS-422 interface and non- channelized E1,transfer signaling and traffic data between BSC and BTS. 2.BSC-CDSU and BTS-CDSU, have the same hardware structure 1.Convert signal between RS-422 interface and non- channelized E1,transfer signaling and traffic data between BSC and BTS. 2.BSC-CDSU and BTS-CDSU, have the same hardware structure

ZTE Confidential CDSU Panel RUN ALM DT0 DT1 RST RUN Running ALARM Alarm DT0 Synchronization A DT1 Synchronization B RST Reset Button

ZTE Confidential ASM ---In CDMA system, BSC communicates with BSC via ASM board to enable inter-BSC soft handoff. The communication link is connected to BSCs via E1 link. ---According to different bandwidth provided by the communication link, ASM board is classified into ASM board providing 2*E1 trunk and ASM board providing 4*E1 trunk. ---In CDMA system, BSC communicates with BSC via ASM board to enable inter-BSC soft handoff. The communication link is connected to BSCs via E1 link. ---According to different bandwidth provided by the communication link, ASM board is classified into ASM board providing 2*E1 trunk and ASM board providing 4*E1 trunk.

ZTE Confidential TS--Timing Subsystem According to the CDMA standard,BSC and BTS independently synchronization the timing signal provided by GPS. Timing subsystem provides such timing signal: *PP2S *16chips ： MHz *TOD message According to the CDMA standard,BSC and BTS independently synchronization the timing signal provided by GPS. Timing subsystem provides such timing signal: *PP2S *16chips ： MHz *TOD message

ZTE Confidential Timing distributing of BSC

ZTE Confidential TS Box PSMBPSMB CDSUCDSU CDSUCDSU CDSUCDSU CDSUCDSU CDSUCDSU CDSUCDSU CDSUCDSU CDSUCDSU CDSUCDSU CDSUCDSU CDSUCDSU CDSUCDSU CPMCPM CPMCPM PAMPAM GPSTMGPSTM TCMTCM GPSTMGPSTM PSMBPSMB

ZTE Confidential TCM Functions TCM board mainly provides the following functions: 1. It receives clock signals of active and standby GPSTMs; 2. It synthesizes and distributes 10MHz signals; 3. It receives 16CHIP and PP2S signals of active and standby GPSTMs; 4. It implements phase-lock on 16CHIP signal; 5. It generates new PP2S. TCM board mainly provides the following functions: 1. It receives clock signals of active and standby GPSTMs; 2. It synthesizes and distributes 10MHz signals; 3. It receives 16CHIP and PP2S signals of active and standby GPSTMs; 4. It implements phase-lock on 16CHIP signal; 5. It generates new PP2S.

ZTE Confidential TCM Panel RUN green Lights up when the TCM works normally ALM red Lights up when the TCM works abnormally LOCK green Lights up when the TCM is locked CLK: an SMA socket, used for monitoring of the TCM’s 16chip timing signal PP2S: an SMA socket, used for monitoring of the TCM’s PP2S timing signal and for BS testing

ZTE Confidential GPSTM Function GPSTM receives 1PPS signal from GPS receiver and generates PP2S signal, 16CHIP signal, 10MHz signal and TOD signal via phase-lock for the usage of the system. In case GPSTM cannot find the satellite, it provides the hold-over function. According to the specifications, the wander of the board should not be over 7ms in 24 hours; in this system, GPSTM implements less than 5ms wander in 4 days. GPSTM also implements active/standby automatic switching. It can detect and report board working states.

ZTE Confidential GPSTM Run indicator Active/standby indicator Indication of searching for satellite RST Fault indicator Reset key Power switch 16CHIP output Indication of IPPS phase exceeding 800ns CONTROL GPSAIM RUN ACTIVE 1PPSAIM AIM CLK PWR RS232

ZTE Confidential The End