BSC操作维护

Ericsson GSM BSS system ModelBSCBSC与与MSCMSC之间的之间的接口是接口是A A接口接口A接口上传送的信息有话音信息(通过TRAU设备处理)C7信令信息(由C7信令终端处理)BSCBSC与与BTSBTS之间的之间的接口是接口是A_bisA_bis接口接口话音信息(Transcoder Rate Adaptor-TRAU)信令信息(Transceiver Handler)A_bis接口上传送的信息有Transcoder Rate Adaptor(TRAU)话音信息话音信息的传送在RTC和BTS上的TS之间完成。RTC(REMOTE TRANSCODER)用来完成语音业务的转换和速率的调整，该设备位于BSC上，即通常我们所说的TRAU设备，但是由于对该功能的控制是由BTS上的RTH(REMOTE TRANSCODER HANDLER)完成的，所以叫做REMOTE TRANSCODING(远端转换)TRAU的功能语音速率的调整 从64K bit/s 转换为13k bit/s不连续发射和话音监测不连续发射时，背景噪音的产生话音补偿。对丢失的帧进行补偿，用以前的帧来代替丢失的帧TRAU设备为MUX组设备，即一个MUX组是由一个MUX设备和四个DEMUX设备构成。DEMUX设备完成语音速率的转换即从64K bit/s转换为13K bit/s；而MUX设备用于完成将四路13K bit/s速率的话音转化为413K bit/s12K bit/s（同步信息）后通过选组极送到PCM的一个时隙话音的速率转换在BSC上的TRAU设备中完成，在BTS中的TS设备中重新进行转换，通过空中接口发射到用户TRAUTRAU与与BTSBTS上的上的TSTS设备连接方式接方式半永久连接(SEMI)共享方式(POOL)半永久连接TRAU设备RTTF1D1(全速率)或RTTF1D2(增强型全速率)与TS的连接是一一对应的，该连接是在BTS被指令激活后，系统分配的。因为TS在工作时需要与TRAU建立连接，无论是否承载话务，所以如果TRAU设备不足，将会导致部分TS无法工作这种连接是较为固定的，即处理话音业务的TS与DEMUX的TRAU设备存在一一对应的固定连接。我们可以通过指令RXMDP来查看 RXMDP:MO=RXOTS-TG-TRX-TS;RXMDP:DEV=RTTF1D1-XX,MOTY=RXOTS;共享方式TRAU设备对于基站是共享的，它们之间不存在一一对应关系。相较半永久连接，因为TS工作不再需要与TRAU建立连接，只是在有话务建立时，系统才会为该TS指派一个TRAU设备。所以，这种方式节省了TRAU设备，提高了其使用率。完成这种连接方式需要SRS的支持。另外，因在这种连接方式中的TRAU设备是不固定的，所以追踪TRAU设备只能针对那些正在占用的话音信道，指令为RAPTI:LCH=TCH-XX;TRAU设备的类型:RTTRS(全速率)-TRA HARWARE VERSION3;RTTF1D(全速率),RTTF2D(增强型全速率),RTTH2D(半速率)-TRA HARDWARE VERSION 4;RTTF1D1(全速率),RTTF1D2(增强型全速率),RTTH1D(半速率)-TRA HARDWARE VERSION 5;TRAU设备的连接方式定义:应用指令:RXMOP:MO=RXOTG-xx;查看参数TRACO;TRAU设备定义定义RP类型EXRPI:RP=114,TYPE=RP4S1A;定义RP软件EXRUI:RP=114,RPT=115,SUID=1/CAA 135 2518/RPMBH R1C02;EXRUI:RP=114,RPT=115,SUID=1/CAA 135 004/RPFD R3A01;EXRUI:RP=114,RPT=115,SUID=1/CAA 135 005 R1A02;EXRUI:RP=114,RPT=115,SUID=1/CAA 135 2517/RPMM R1A01;EXRUI:RP=114,RPT=115,SUID=1/CAA 135 2509/REX R3B01;EXRUI:RP=114,RPT=115,SUID=1/CAA 135 3072 R2A01;定义设备EXEMI:RP=114,RPT=115,EM=0,EQM=RTTF1S1-0&-31,SUID=1/CAA 135 3072 R2A01;定义SNTNTCOI:SNT=RTTF1S1-0,TSMP=TSM-8-0,SNTV=1;EXDUI:DEV=RTTF1S1-2&-31;EXDAI:DEV=RTTF1S1-2&-31;解锁RP,EM以及SNTBLRPE:RP=114;BLRPE:RP=115;BLEME:EM=0,RP=114,RPT=115;NTBLE:SNT=RTTF1S1-0;解锁设备RRTBE:DEV=RTTF1S1-2&-31;TRAU设备定义(续)定义TRA POOLRRTPI:TRAPOOL=FR,CHRATE=FR,SPV=1;RRTPC:TRAPOOL=FR,RNOTRA=768;RRTPI:TRAPOOL=EFR,CHRATE=FR,SPV=2;RRTPC:TRAPOOL=EFR,RNOTRA=3072;定义TRAPOOL的空闲监测功能RRISI:TRAPOOL=FR,ACL=A2,LIM1=2,LIM2=1;RRISI:TRAPOOL=EFR,ACL=A2,LIM1=2,LIM2=1;定义TRAPOOL的占用监测功能RRMSI:TRAPOOL=EFR,ACL=A3,ALPERC=40;RRMSI:TRAPOOL=EFR,ACL=A3,ALPERC=40;Transceiver Handler(TRH)信令信息BSC是通过LPAD信令完成对基站的控制的，而处理LPAD信令的两个基本单元是TRH设备和TRXC设备。TRH设备：根据控制其RP类型的不同，一个TRH可以分别控制：RPD:最多七个TRX;RPG:最多二十四个TRX;TRXC设备：该设备为载波的主要控制单元。其用来在TRX-TRH和TRX-MS之间传送信息。后者主要是一些透明信息（即不需要经TRX处理的信息）。查找这种连接，可以使用指令：RXMDP:MO=RXOTRX-TG-TRX;RXMDP:MOTY=RXOTRX,DEV=RHDEV-XX;TRH的连接方式:No concentration;LAPD Concentration;LAPD Multiplexing;查看方式:RXMOP:MO=RXOTRX-XX-YY;RXMOP:MO=RXOCF-XX;查看参数SIG的定义LAPD ConcentrationLAPD MultiplexingTRH负荷过高将影响其功能和性能的实现TRH的功能:建立和监测 LAPD链路 (Abis).LAPD 信令。包括 RSL（Radio Signalling Links)和 OML(Operation&Maintenance Links).寻呼 位置更新 点对点短信 BCCH系统信息 AGCH立即指派 SACCH测量报告 BTS 配置，软件转载 对测量报告进行评估 其他功能，如 CTR,MRR,BAR,DMP,DBP为什么要注意为什么要注意TRHTRH负荷？负荷？高话务，过多的测量报告过多的寻呼消息TRH 控制过多的TRX使用半速率功能过多的切换请求TRHs设备出现闭锁或者硬件软件故障影响影响TRH TRH 负荷的因素负荷的因素防止防止TRH TRH 负荷超限的方法负荷超限的方法TRH 负荷分配增加MSC第一次的寻呼时长寻呼时使用TMSI代替IMSI，减少空中信令负荷增加周期登记的时长尽量减少LAPD信令压缩和MPLEX方式的应用TRH TRH 负荷分配负荷分配立即调配 使用指令RAHIIRAHII即时调配;周期性调配 使用测量程序生成的“TRH load TableTRH load Table”作为负荷调配的依据，进行调配使用指令RAHPI和TRTSI.周期调配TimeSTIME(RAHDC)Load Calculation(RAHHP)Load CollectionINTERVALTIME(TRTSI)TIME+(NRP*RPL)(TRTSI)No RearrangementRearrangementNo RearrangementNRP*RPL建议取值Parameter Command RecRPD RecRPG RecMix(RPD+RPG)CAPLIMCAPHYSTAVELIMSTIMEINTERVALTRHLIMNOTRHLIMTIMENRPRPLNDAYSRAHDCRAHDCRAHLCRAHDCRAHDCRAHLCRAHLCTRTSITRTSITRTSITRTSI871002.0024hrs1530%01.001120min365days25102802.0024hrs3030%01.001120min365days15102002.0024hrs2530%01.001120min365daysTRH LoadCAPLIM+CAPHYSTCAPLIMCAPHYSTTRH 1TRH 2Free CapFree CapMAX TRH LoadTRX 1TRX 2TRX 3TRX 4Before.调配须满足调整后的接受TRH 的空闲信令负荷仍要高于CAPLIM+CAPHYSTTRH LoadCAPLIM+CAPHYSTCAPLIMCAPHYSTTRH 1TRH 2Free CapFree CapMAX TRH LoadTRX 1TRX 2TRX 3TRX 4After.TRH负荷的计算（第一步）RAHHP:SNT=ALL;RADIO CONTROL ADMINISTRATIONTRH LOAD TABLEDATE TIME AVECAP030910 0050 27SNT CAP HIGHCAP LOWCAPRHSNT-0 24 40 24RHSNT-1 27 33 27.RHSNT-86 32 87 28RHSNT-87 48 98 46 RPD TRH 负荷计算RPG TRH 负荷计算TRH负荷的计算（第二步）例子SNT RHSNT-0 (RPD)SNT RHSNT-87 (RPG)TRH设备定义定义RP类型EXRPI:RP=82,TYPE=RPG3A;定义RP软件EXRUI:RP=82,SUID=9000/CXC 146 10 R1B01;EXRUI:RP=82,SUID=9000/CXC 146 27 R1f01;EXRUI:RP=82,SUID=CXC 146 1074/0810 R2A01;EXRUI:RP=82,SUID=CXC 146 1077/0630 R1A02;EXRUI:RP=82,SUID=CXC 146 1071/0630 R2A01;EXRUI:RP=82,SUID=CXC 146 1065/0810 R1A01;EXRUI:RP=82,SUID=CXC 146 1062/0810 R1c01;EXRUI:RP=82,SUID=CXC 146 1056/0810 R1c01;EXRUI:RP=82,SUID=CXC 146 1068/0810 R2A01;定义设备EXEMI:EQM=RHLAPD-0&-127,RP=82,EM=0,SUID=CXC 146 1074/0810 R2A01;EXEMI:EQM=RHSNT-0&-31,RP=82,EM=1,SUID=CXC 146 1077/0630 R1A02;EXEMI:EQM=RMPAG-0&-127,RP=82,EM=2,SUID=CXC 146 1071/0630 R2A01;EXEMI:EQM=RCSCB-0&-127,RP=82,EM=3,SUID=CXC 146 1065/0810 R1A01;EXEMI:EQM=RQUNC-0&-127,RP=82,EM=4,SUID=CXC 146 1062/0810 R1c01;EXEMI:EQM=RQRCQS-0&-127,RP=82,EM=5,SUID=CXC 146 1056/0810 R1c01;EXEMI:EQM=RCLCCH-0&-127,RP=82,EM=6,SUID=CXC 146 1068/0810 R2A01;TRH设备定义(续)定义SNTNTCOI:SNT=RHSNT-0,TSMP=TSM-9-8,SNTV=1;EXDUI:DEV=RHDEV-0&-31;EXDAI:DEV=RHDEV-1&-31;解锁RP,EM以及SNTBLEME:RP=82,EM=0;BLEME:RP=82,EM=1;BLEME:RP=82,EM=2;BLEME:RP=82,EM=3;BLEME:RP=82,EM=4;BLEME:RP=82,EM=5;BLEME:RP=82,EM=6;BLRPE:RP=82;NTBLE:SNT=RHSNT-0;解锁设备BLODE:DEV=RHDEV-1&-31;Subrate Switch(SRS)SRS FunctionThe Sub rate Switch is an extension to the Group Switch.Sub rate transmission is permitted from 8 kbps to 56 kbps in increments of 8 kbps.This makes it possible to switch devices from different transcoder to the same Exchange Terminal Circuit(ETC)device.SRS Function Example 1SRS Function Example 2SRS Function UtilizationSRS Function UtilizationPosPosROJ NameROJ NameROJ Number ROJ Number Strapping Strapping Connections Connections 00 00 STRAB STRAB 119 1112/00-15119 1112/00-15-48,Magazine address board(00-15)48,Magazine address board(00-15)-18,Plane address board(A-plane=01,B-plane=15)18,Plane address board(A-plane=01,B-plane=15)0202RP4-F RP4-F 207 056/1207 056/1-45,EM-bus cable to SRSB2(pos.06*22)in other 45,EM-bus cable to SRSB2(pos.06*22)in other planeplane40,EM-bus cable to SRSB2(pos.11*22)in other 40,EM-bus cable to SRSB2(pos.11*22)in other planeplane21,RP-bus outgoing cable21,RP-bus outgoing cable17,RP-bus incoming cable17,RP-bus incoming cable12,Power cable12,Power cable06 11 06 11 16 2116 21SRSB2SRSB2207 054/1207 054/1-22,EM-bus cable22,EM-bus cable17,DL3-link cable17,DL3-link cable12,DL3-link cable 12,DL3-link cable 3636RP4-FRP4-F207 056/1207 056/1-45,EM-bus cable to SRSB2(pos.16*22)in other 45,EM-bus cable to SRSB2(pos.16*22)in other planeplane40,EM-bus cable to SRSB2(pos.21*22)in other 40,EM-bus cable to SRSB2(pos.21*22)in other planeplane21,RP-bus outgoing cable21,RP-bus outgoing cable17,RP-bus incoming cable17,RP-bus incoming cable12,Power cable12,Power cableSRS Function UtilizationThe SRSB2 receives data from both planes of the TSM and sends switched data back to both planes.The SRSB2 distributes data to all SRSB2 boards within a plane;this means that data from any link is fully available to the switch in every SRSB2.SRS Function UtilizationSoftwareSoftwareSRS,Sub Rate Switch OwnerSRS,Sub Rate Switch Owner SRS is the SNT-and EM-handling block for the hardware.SRS is the SNT-and EM-handling block for the hardware.SRS performs administration and maintenance of the sub SRS performs administration and maintenance of the sub rate switch.rate switch.SRSTRAF,Sub Rate Switch Traffic functionsSRSTRAF,Sub Rate Switch Traffic functions SRSTRAF performs as sub rate traffic handling interface SRSTRAF performs as sub rate traffic handling interface towards GSS-users as well as administration and towards GSS-users as well as administration and maintenance.maintenance.SRS Capacity CalculationSRS Capacity Calculation(1)The utilization of the MUPs(on 64 kbit/s level)between the subrate switch and the group switch shall be maximum 90%in TRC and BSC/TRC nodes 80%in BSC node.A higher MUP utilization can be handled in BSC/TRC and TRC since in these nodes a fairly large amount of group switch connections are setup on a per call basis.SRS size in MUPs,maximum is 4096SRS Capacity Calculation(2)To To AbisAbis ETCsETCs1 MUP carries 4 16 kbit/s traffic channels or 16 kbit/s LAPD links if LAPDmultiplexing is used.8 half rate traffic channels may also be carried.If not used for traffic the channels are looped in the subrate switch.The required number of MUPs depends on which RBS is used:For RBS 200 2 MUPs per TRX are always needed.For RBS 2000 the subrate channels on Abis are packed for each BTS site,each TCH needs one 16 kbit/s channel,and each LAPD multiplexed channel needs 16 or 32 kbit/s channel depending on the bit rate used.Typically 1.75 MUPs are needed per TRX if LAPD multiplexing is not used.SRS Capacity Calculation(3)To TRH/RPG2To TRH/RPG2If LAPD multiplexing is used one MUP is needed for each LAPD multiplexedLAPD link,irrespective of if 16 kbit/s or 32 kbit/s rate is used.To TRAB,connection to BTSTo TRAB,connection to BTSEach TRAB can handle maximum 24 traffic channels.For transcoders in the FR or EFR pools 6 MUPs are required to carry these to BTS(6*4=24).For transcoders in the HR pool 3 MUPS is required(3*8=24).SRS Capacity Calculation(4)To PCU/RPP,connection to BTSTo PCU/RPP,connection to BTSEach RPP can maximum handle 150 packet data channels.Maximum 150/4=38 MUPs are required per RPP to carry these to BTS.In BYB 501 the BSC maximum 14 RPPs can be handled,thus the maximum number of required MUPs are 14*38=532.In BYB202 the BSC maximum 15 RPPs can be handled,thus the maximum number of required MUPs are 14*38=570.SRS Capacity Calculation(5)To To AterAter interface interfaceEach device(64 kbit/s time slot)carrying traffic requires a MUP to the sub-Group Switching Subsystem(GSS)rate switch,31 per ETC5 board and 24 per ETC24 boardFor HSCSD trafficFor HSCSD trafficSubrate connections are needed also from the transcoder to the A interface:HSCSD,transcoder side:Each 16 kbit/s channel in a HSCSD call requires one MUP to the subrate switch,that is NTS MUPs per call HSCSD,A interface side:At the A interface all 16 kbit/s channels are connected to the same MUP,this requires one MUP to the subrate switch per HSCSD call.SRS Capacity Calculation(6)2*TRXs+0.25*FR_TRA+0.125*HR_TRA+38*RPPs+4*HSCSD_CALL 0.9*SRS_sizeTRX=number of TRXs using pooled transcodersFR_TRA=number of full rate transcoder channels in pool,including enhanced full rate(ANOTRA in RRTPP printout)HR_TRA=number of half rate transcoder channels in pool(ANOTRA in RRTPP printout)RPP=number of RPPs used HSCSD_CALL=number of HSCSD CALLSRS_size=SRS size in MUPs,maximum is 4096SRS Define In BSC(1)SubfileSubfile 10000,APT Size Alteration Events 10000,APT Size Alteration EventsSAAII:SAE=529,BLOCK=SRSSRSTRAF,NI=8;!NO OF SUBRATE SWITCH IN ONE PLANE!NI=HIGHEST SRSSRS NUMBER!SAAII:SAE=529,BLOCK=SRSSRS,NI=8;!NO OF SUBRATE SWITCH UNITS!NI=(SAE529 SRSSRSTRAF)!SRS Define In BSC(2)SubfileSubfile 19000,Database,Table Specification 19000,Database,Table Specification!Magazine SRSSRSM2,BFD 561 006/2,plane A!DBTRI;DBTSI:TAB=RPSRPBSPOS,RPADDR=40,BRNO=1,MAGNO=01,SLOTNO=0,BUSCONN=YES;DBTSI:TAB=RPSRPBSPOS,RPADDR=42,BRNO=1,MAGNO=01,SLOTNO=7,BUSCONN=YES;DBTRE:COM;!Magazine SRSSRSM2,BFD 561 006/2,plane B!DBTRI;DBTSI:TAB=RPSRPBSPOS,RPADDR=41,BRNO=1,MAGNO=02,SLOTNO=0,BUSCONN=YES;DBTSI:TAB=RPSRPBSPOS,RPADDR=43,BRNO=1,MAGNO=02,SLOTNO=7,BUSCONN=YES;DBTRE:COM;SRS Define In BSC(3)SubfileSubfile 20000,Allocation of RP 20000,Allocation of RP!Define the RPRP!EXRPI:RP=40,RPT=41,TYPE=RP4L1A;!Loading RP Software!EXRUI:RP=40,RPT=41,SUNAME=RPMMR;EXRUI:RP=40,RPT=41,SUID=1/CAA 135 3016/SRS R1A06;!SRSR !EXRUI:RP=40,RPT=41,SUID=1/CAA 135 2509 R3A ;!REXR !EXRUI:RP=40,RPT=41,SUID=1/CAA 135 004/RPFD R3A01;!RPFDR!EXRUI:RP=40,RPT=41,SUID=1/CAA 135 005 R1A02;!TERTR!SRS Define In BSC(4)SubfileSubfile 20100,Allocation of EM 20100,Allocation of EM!Define the EM!EXEMI:EQM=SRS-0,RP=40,RPT=41,SUID=1/CAA135 3016/SRS R1A06,EM=0;EXEMI:EQM=SRS-0,RP=40,RPT=41,SUID=1/CAA135 3016/SRS R1A06,EM=1;EXEMI:EQM=SRS-1,RP=41,RPT=40,SUID=1/CAA135 3016/SRS R1A06,EM=2;EXEMI:EQM=SRS-1,RP=41,RPT=40,SUID=1/CAA135 3016/SRS R1A06,EM=3;SRS Define In BSC(5)SubfileSubfile 20200,Insertion of SNT 20200,Insertion of SNTNTCOI:SNT=SRS-0,SNTV=2;SNTP=TSM-0-0,NTCOI:SNT=SRS-1,SNTV=2;SNTP=TSM-1-0,NTCOI:SNT=SRS-2,SNTV=2,SNTP=TSM-2-0;NTCOI:SNT=SRS-3,SNTV=2,SNTP=TSM-3-0;NTCOI:SNT=SRS-4,SNTV=2,SNTP=TSM-4-0;NTCOI:SNT=SRS-5,SNTV=2,SNTP=TSM-5-0;NTCOI:SNT=SRS-6,SNTV=2,SNTP=TSM-6-0;NTCOI:SNT=SRS-7,SNTV=2,SNTP=TSM-7-0;SRS Define In BSC(6)SubfileSubfile 93000,93000,DeblockingDeblocking of RP of RPBLRPE:RP=40;BLRPE:RP=41;SubfileSubfile 93100,93100,DeblockingDeblocking of EM of EMBLEME:RP=40,RPT=41,EM=0;BLEME:RP=40,RPT=41,EM=1;BLEME:RP=41,RPT=40,EM=2;BLEME:RP=41,RPT=40,EM=3;BLEME:RP=40,RPT=41,EM=4;BLEME:RP=40,RPT=41,EM=5;BLEME:RP=41,RPT=40,EM=6;BLEME:RP=41,RPT=40,EM=7;SRS Define In BSC(7)SubfileSubfile 93200,93200,DeblockingDeblocking of SNT of SNTNTBLE:SNT=SRS-0;NTBLE:SNT=SRS-1;NTBLE:SNT=SRS-2;NTBLE:SNT=SRS-3;NTBLE:SNT=SRS-4;NTBLE:SNT=SRS-5;NTBLE:SNT=SRS-6;NTBLE:SNT=SRS-7;SRS Relation problem AnalyzeTest System:-PRINT VAR SRSTRAF 83;!CCOUNTGSFAULTOUT!-PRINT VAR SRSTRAF 82;!CCOUNTGSFAULTIN!-PRINT VAR SRSTRAF 80;!CCOUNTGSCONGIN!-PRINT VAR SRSTRAF 81;!CCOUNTGSCONGOUT!-PRINT VAR SRSTRAF 88;!CCOUNTSRSFAULT!End;SRS Relation Problem AnalyzeThe counter CCOUNTGSFAULTOUT(variable 83CCOUNTGSFAULTOUT(variable 83)is stepped every time a FAULT IN GROUP SWITCH DURING OPERATION is experienced,and the signal GSFAULT is sent form SRSTRAF.The counter CCOUNTGSFAULTIN(variable 82)CCOUNTGSFAULTIN(variable 82)is stepped every time a CARRIER SETUP FAILED DUE TO FAULT IN HW is experienced,and the signal GSFAULT is received in SRSTRAF.The counter CCOUNTGSCONGIN(variable 80)CCOUNTGSCONGIN(variable 80)is stepped every time a CARRIER SETUP FAILED DUE TO CONGESTION is experienced,and the signal GSCONG is received in SRSTRAF.The counter CCOUNTGSCONGOUT(variable 81)CCOUNTGSCONGOUT(variable 81)is stepped every time a CONGESTION IN THE GROUP SWITCH is experienced,and the signal GSCONG is sent form SRSTRAF.The counter CCOUNTSRFAULT(variable 88)CCOUNTSRFAULT(variable 88)is stepped every time a SRS PATH SETUP FAILED DUE TO FAULT IN SRS HW is experienced,and the signal SRFAULT is received in SRSTRAF.BTS Associated Interface Switch(IS)Concentrator(CON)Digital Path(DP)How to understand the log filesProtocoll Errors in log files