话务统计概念(EOES).PPT

1、1Better Makes Best2BSC相关计数器以及统计分析相关计数器以及统计分析1243453OBJTYPE：是某一类型计数器的集合。每个OBJTYPE包 一套计数 器。比如统计TCH指标的CELTCHF 。 F指全速率COUNTER： 计数器。比如CELTCHF中统计掉话数目的TFNDROP。 OBJ 统计的个体单元，比如统计的每一个小区名或是切换统 计中的每一个切换关系。举例说明如下：CELTCHF： 是统计TCH话务的OBJTYPE，它包含系列COUNTER：TFCALLS： 试呼次数； TFNDROP：掉话次数；TFCONGSAS：指配拥塞次数； 等等。4Object and

2、Object Type Definition5Counters of Overlaid and Underlaid cell上下层小区计数器的关系:Dependent:Since the relation is dependent, incrementing the overlaid subcell counter THTRALSUB will lead to incrementing the corresponding underlaid subcell counter THTRALACC at the same time.Disjoint:Since the relation is dis

3、joint, incrementing the overlaid subcell counter TFV1TCONSUB will not affect the corresponding underlaid subcell counter TFV1TCONGS.怎样阅读理解有关的内容6 每隔5分钟或者15分钟,DB从BSC中的相关应用中获取计数器统计信息. 报告程序(Report Programs)在需要产生报告时从DB中获取相关信息 报告的产生根据报告形成时间表来进行统计子系统概述:怎样定义收集和处理相关的计数器统计7STS Subsystem Overview8BSC Objects a

4、nd STS Object TypesvBSC BSCMS Sessions, Paging LOASProcessor Load, Exchange Statistics BSCMSLOTMultislot Connections9BSC Objects and STS Object Types, Contd 1v CELL CELLCCHDRSDCCH Drops Reasons CELLCCHHOSDCCH Handovers CELEVENTDSubscriber Initiated Disconnections CELEVENTHLoad Sharing, HO due to O&a

5、mp;M CELEVENTSOverlaid/Underlaid Handovers CELEVENTIIntracell Handovers CLSDCCHSDCCH Congestion, Drop and Allocation CLSMSSMS, Short Message Service CLTCHAssignments, TCH Traffic CELLSQISpeech Quality CELLHCSLocating Measurement for HCS10BSC Objects and STS Object Types, Contd 2vCELL CELLCONFAdaptiv

6、e SDCCH Configuration DOWNTIMECell Downtime CLTCHDRFTCH/F Drop Reasons CLTCHDRHTCH/H Drop Reasons CELTCHFTCH/F Allocation, Traffic, Drops, Cong（拥塞） CLTCHFV1TCH/F Speech Version 1/2/3 Statistics CLTCHFV2 (Allocation, Traffic, Congestion) CLTCHFV3 CELTCHHTCH/H Allocation, Traffic, Drops, Cong CLTCHHV1

7、TCH/H Speech Version 1/2/3 Statistics CLTCHHV2 (Allocation, Traffic, Congestion) CLTCHHV311BSC Objects and STS Object Types, Contd 3vCELL IDLEOTHCFIdle Channel Measurements for TCH IDLEOTHCHFullrate & Halfrate in Overlaid & Underlaid IDLEUTHCFSubcell IDLEUTHCH RANDOMACCRandom Access Statisti

8、cs12BSC Objects and STS Object Types, Contd 4v CELL RELATION NCELLRELHO Commands, Successful & Returned HO NECELLREL. for External Relations NICELASSAssignment Handovers NECELASS. for External Relations NICELHOHandover decision NECELHO. for External Relations NICELHOEXHO at High handover rate, F

9、ast Moving MS NECELHOEX. for External Relations13Mnemonic for Counter Namesv C- SDCCHv TF- TCH/F (Full rate) TFV1- TCH/F Speech Version 1 (Normal FR) TFV2- TCH/F Speech Version 2 (EFR) TFV3- TCH/F Speech Version 3v TH-TCH/H (Half rate ) THV1- TCH/H Speech Version 1 THV2- TCH/H Speech Version 2 THV3-

10、 TCH/H Speech Version 3v -SUB Overlaid Subcellv -UL- Up Linkv -DL- Down Linkv -BL- Both Links (Uplink and Downlink)14BTS基站相关统计(DOWNTIME)Type Counter name Description PC TDWNACC Cell downtime accumulator PC TDWNSCAN Number of accumulations of Cell downtime accumulatorthe cell downtime accumulator (TD

11、WNACC) is stepped every tenth second when the cell state is ACTIVE and there are no TCHs in IDLE or BUSY state in that cell.15BSC TCHDATA COUNTER vTNUCHCNT：定义的信道数； （包括在celtchf里的counter）vTAVAACC：每10秒扫描一次可用信道数，之后累积到TAVAACC； vTAVASCAN：整个统计时间总的TCH信道扫描总次数；如整个统计时间内无信道损坏，TAVAACC=TNUCHCNT*TAVASCAN； v可用信道=TA

12、VACC/TAVASCAN，当出现小数时说明统计期间有部分信道短时间内不可用。vTASSCAL：忙时话音信道试呼总次数（不含切换）。是指所有占用SDCCH后对TCH的试呼次数。试呼包括主叫和被叫试图建立通话的情况，包括非常早分配时指派TCH信道用做SDCCH的情况，不包括各种切换情况。统计的为“Assignment Request”消息。 16v TASSATT：TCH指配偿试次数，含切换指配。 v TCHSIG:在TCH上立即指配成功次数；TCH当SDCCH用；在启动TCH上的立即指配后，即CHAP=1的情况下才会出现； v TFNDROP：TCH异常释放次数，即掉话次数；统计的为“CLEA

13、R REQUEST”消息。v TFMSESTB：是指忙时主叫或被叫呼叫指派话音信道成功的总次数。统计的为“Connect”消息。移动台成功占用TCH次数。 BSC TCHDATA COUNTER 17v TFCALLS：TCH分配偿试次数，包括TCH作为SDCCH用，指配，切换；v TFTCONGS：TCH拥塞时间计数器；当最后一个空闲的TCH分配后，又有新的TCH分配请求到来时，TFTCONGS就每秒加一直到有空闲的TCH。 v TFTRALACC：全速率信道的话务量累积器； v TFNSCAN：全速率信道话务量累积次数。 BSC TCHDATA COUNTER 18v TFCONGSAS：

14、在分配时的TCH拥塞计数器；由于无空闲的可用信道引起在分配或立即指配时分配失败，此时计数器加一。 v TFCONGSHO：在切换时的TCH拥塞计数器；由于无空闲的可用信道引起在切换指配失败，此计数器加一。 v TFNRELCONG：由于无线资源拥塞引起的掉线计数器。当TCH连接作为信令连接，而立即指配的结果是由于无线资源拥塞而释放连接，即TRA资源拥塞。在BSC间的越局切换存在资源拥塞的情况也会使计数器增加。BSC TCHDATA COUNTER 19v TFDISQA：质差掉话计数器；有TFDISQAUL（上行）、TFDISQADL（下行）、TFDISQABL（上下行）； v TFDISTA

15、：由于TA值太大引起的掉话计数器；TA大于TALIM； v TFDISSS1、TFDISSS2、TFDISS3、TFDISSS4、TFDISSS5：由于信号强度低引起的掉话计数器，其中数字1、2、3、4、5是指不同CLASSMARK的手机； v TFSUDLOS：非上述三种情况下引起的掉话归为突然性掉话，此计数器就是突然性掉话的计数器；不明原因的掉线是由于未收到MS的测量报告； BSC TCHDATA COUNTER 20vHOVERCNT：发送至邻区的切换命令数目；统计的为“HANDOVER COMMAND”。 vHOVERSUC：成功切至邻区的次数；当收到来自MSC的由于切换成功的“CLE

16、AR COMMAND”或“HANDOVER PERFORMED”或“ASSIGNMENT COMPLETE”发送至MSC时，计数器加一； vHORTTOCH：由于切换至邻区的切换偿试失败而返回旧信道的次数；-回切次数； BSC TCHDATA COUNTER 21vCCALLS：SDCCH分配偿试次数，包括成功与失败的分配； vCCONGS：SDCCH拥塞计数器；由于无可用的空闲SDCCH信道引起的分配失败次数；vCTCONGS：SDCCH拥塞时间计数器；当最后一个空闲的SDCCH分配后，由于无空闲的信道引起新的SDCCH分配请求失败，此时启动CTCONGS计数器，每一秒计数器加一，直到有空闲

17、信道为止； vCTRALACC：SDCCH的总话务量，话务量累积器；计算在每小区上信道占用的次数；当信道从IDLE变为SEIZED时，计数器加一，当信道从SEIZED变为IDLE或BLOCK时，计数器减一；计数器每2秒扫描一次该小区内的所有SDCCH，把计数器结果累积到CTRALACC中； BSC CCHDATA COUNTER 22v CNSCAN：统计周期内的扫描次数计数器；忙时SDCCH总话务量=CTRALACC/CNSCAN； v CNDROP：SDCCH的掉话计数器； v CNUCHCNT：定义的SDCCH数目；当采用SDCCH/8映射方式，即BCCHTYPE=NCOMB时，CNUC

18、HCNT=8*SDCCH；（SDCCH是配置的BPC数，一个BPC支持8个SDCCH）；采用SDCCH/4，即BCCHTYPE=COMB时，CNUCHCNT=4*SDCCH；如果CBCH=YES，则相应的CNUCHCNT总数目减1； BSC CCHDATA COUNTER 23vCAVAACC：可用的SDCCH累积器； vCAVASCAN：扫描次数，扫描周期为10秒； v可用的SDCCH数目=CAVAACC/CAVASCAN； vCMSESTAB：MS成功占用SDCCH计数器；即当在MSC与MS之间成功建立信令链的次数；统计的为“SCCP CONNECTION CONFIRMED”“HANDO

19、VER COMPLETED”“HANDOVER PERFORMED”TO MSC； vCNRELCONG：由于无线资源拥塞引起的SDCCH掉话计数器；与此同时，CNDROP也计数； BSC CCHDATA COUNTER 24v CDISQA：质差掉话计数器； v CDISSS （CDISSS1、CDISSS2、CDISSS3、CDISSS4、CDISSS5）信号强度低引起的掉话计数器；后面的数字是标记不同CLASSMARK的手机； v CDISTA：TA过大引起掉话的计数器； v CNROCNT：合法的随机接入计数器； v RAACCFA：随机接入失败计数器；失败原因可能是：TA太大，或“S

20、OFTWARE FILE CONGESTION”。BSC CCHDATA COUNTER 25v RAEMCAL：紧急呼叫的随机接入次数；CAUSE VALUE：101X XXXX。CAUSE VALUE中前3比特是建立原因码；5个XXXXX是随机码。以识别同一时间接入的不同MS。（32只）v RACALRE：呼叫重建的随机接入计数器。v RAANPAG：寻呼应答的随机接入计数器。v RAOSREQ：其它服务请求的随机接入计数器；v RAOTHER：其它原因随机接入计数器；位置更新等。BSC CCHDATA COUNTER 26Type Counter name Description PC

21、CNROCNT Number of accepted random accesses PC RAACCFA Failed random access PC RAEMCAL Number of random accesses, Emergency call PC RACALRE Number of random accesses, Call reestablishment PC RAANPAG Number of random accesses, Answer to paging. PC RAOSREQ Number of random accesses, Other service reque

22、st. PC RAOTHER Number of random accesses, All other cases. PC RATRHFAEMCAL Number of rejected CHANNEL REQUIRED in TRH with establishment cause Emergency call. PC RATRHFAOTHER Number of rejected CHANNEL REQUIRED in TRH which are not included in RATRHFAEMCAL and RATRHFAREG. PC RATRHFAREG Number of rej

23、ected CHANNEL REQUIRED in TRH with establishment cause Location Update.Random Access随机接入(RANDOMACC)27Random Access随机接入(RANDOMACC)28Random Access随机接入(RANDOMACC)29vTCH Traffic (CELL)vAvailable TCH Channels (CELL)vTime Congestion (CELL)Dimensioning of the TCHETFNSCANTFTRALACC10060PERLENTFTCONGSTAVAACCT

24、AVASCAN TNUCHCNT10030TCH Congestion - Counters 131TCH Congestion - Counters 232Type Counter name Description PC DP CCALLS Call attempt counter PC DJ CCONGS Congestion counter PC DJ CTCONGS SDCCH congestion time PC DP CTRALACC Traffic level accumulator PC CNSCAN Number of accumulations of SDCCH traff

25、ic level counter. PC CNDROP Dropped connections due to failure. ST DP CNUCHCNT Number of defined channels PC DP CAVAACC Available channels accumulator PC CAVASCAN Number of accumulations of available channels counter. PC DP CMSESTAB Successful MS channel establishment on SDCCHs. PC DP CNRELCONG Numb

26、er of SDCCHs released due to radio resource congestion. Traffic Measurement for SDCCH per CellCLSDCCH33Monitoring Performance, SDCCHvSDCCH Seizure Performance%vSDCCH Establishment Performancev%vSDCCH Dropped Connection Ratev%100CNROCNTCCALLS100CCONGSCCALLSCMSESTAB100CMSESTABCNDROP34vSDCCH Traffic (C

27、ELL)vAvailable SDCCH Channels (CELL)vCongestion on SDCCH (CELL)Dimensioning of the SDCCHCTRALACCCNSCAN100CCALLSCCONGSCAVAACCCAVASCAN CNUCHNT10035Monitoring Performance, HO on TCH and SDCCHvHandover Success Rate (CELL RELATION)vMS Reversion after Handover (CELL RELATION)vMS Lost during Handover (CELL

28、 RELATION)HOVERSUCHOVERCNT100HORTTOCHHOVERCNT100100HOVERCNTHORTTOCHHOVERSUCHOVERCNT36vHandover Success Rate (CELL)vMS Reversion after Handover (CELL)vMS Lost during Handover (CELL)100CCHHOCNTCCHHOSUC100CCHHOCNTCCHHOTOCH100CCHHOCNTCCHHOTOCHCCHHOSUCCCHHOCNTMonitoring Performance, Handover on SDCCH37Mo

29、nitoring Performance, Dropped Calls on TCHvDropped Calls of Total TCH ConnectionvCall Minutes per Drop (CELL)vSubscriber Perceived Drop (CELL) 100TFMSESTBTFNDROPPERLENTFNDROPTFNSCANTFTRALACC100)()(SUMOAWSUCCSUMOABSUCCSUMOHOSUCCSUMIAWSUCCSUMIABSUCCSUMIHOSUCCTFCASSALLTFNDROP38More Information concerni

30、ng Dropped CallsvDropped TCH/F Connections due to Low Signal Strength of Total Number of Dropped TCH/F Connections%vDropped TCH/F Connections due to Bad Quality of Total Number of Dropped TCH/F Connections %vSuddenly lost Connections of Total Number of Dropped TCH Connections %100TFNDROPTFDISSBLTFDI

31、SSULTFDISSDL100TFNDROPTFDISQABLTFDISQAULTFDISQADL100TFNDROPTFSUDLOS39Type Counter name Description PC CDISQA Dropped connections at bad quality down or up link per cell PC CDISSS1 Dropped connections for power class 1 MSs, at low signal strength down or up link. PC CDISSS2 Dropped connections for po

32、wer class 2 MSs, at low signal strength down or up link. PC CDISSS3 Dropped connections for power class 3 MSs, at low signal strength down or up link. PC CDISSS4 Dropped connections for power class 4 MSs, at low signal strength down or up link. PC CDISSS5 Dropped connections for power class 5 MSs, a

33、t low signal strength down or up link. PC CDISTA Dropped connections at excessive TA PC CDISQASUB Dropped connections at bad quality down or up link per overlaid subcell PC CDISSS Dropped connections at low signal strength down or up link per cell. PC CDISSSSUB Dropped connections at low signal stre

34、ngth down or up link per overlaid subcell. Measurements For Dropped Connections on SDCCH per CellSDCCH 掉话统计CELLCCHDR40Traffic Measurement for TCH per Cell(CLTCH)Type Counter name Description ST DP TNUCHCNT Number of defined channels ST DP TNUCHSUB Number of defined channels in overlaid subcell PC DP

35、 TAVAACC Available BPCs for traffic channels accumulator PC TAVASCAN Number of accumulations of available BPCs for traffic channels counter PC DP TAVASUB Available BPCs for traffic channels accumulator for overlaid subcell PC TAVASCANSUB Number of accumulations of available BPCs for traffic channels

36、 counter for overlaid subcell PC TASSALL Assignment attempts for all MS power classes. Successful attempts are counted in the target cell and failed attempts are counted in the serving cell. PC NONAVFCH Number of attempts to allocate channels of TCH/F type when no channels of that type are defined.

37、PC NONAVHCH Number of attempts to allocate channels of TCH/H type when no channels of that type are defined. PC TASSATT Number of assignment attempts on TCH Incremented always in the target cell. PC TCHSIG Number of TCH connections for signalling 41Type Counter name Description PC DJ TFNDROP Dropped

38、 connections due to failure. PC DJ TFCASSALL Assignment complete for all MS power classes PC DP TFMSESTB Successful MS channel establishment on TCHs PC DP TFMSESTBSUB Successful MS channel establishment on TCHs for overlaid subcell PC DP TFCALLS Call attempt counter PC DP TFCALLSSUB Call attempt cou

39、nter for overlaid subcell PC DJ TFTCONGS TCH congestion time PC DJ TFTCONSUB TCH congestion time for overlaid subcell PC DP TFTRALACC Traffic level accumulator PC TFNSCAN Number of accumulations of traffic level counter PC DP TFTRALSUB TCH traffic level accumulated in overlaid subcell. PC DJ TFNDROP

40、SUB Dropped connections in overlaid subcell due to failure. PC DJ TFCASSALLSUB Assignment complete in overlaid subcell for all MS power classes. PC DJ TFCONGSAS Number of congestion at assignment PC DJ TFCONGSASSUB Number of congestion at assignment in overlaid subcell PC DJ TFCONGSHO Number of cong

41、estion at handover PC DJ TFCONGSHOSUB Number of congestion at handover in overlaid subcell PC DJ TFNRELCONG Number of released TCH due to radio resource congestion. PC DJ TFNRELCONGSUB Number of released TCH due to radio resource congestion in overlaid subcell. PC DJ TFTHARDCONGS Counts the time whe

42、n all radio resources are occupied (hard congestion) PC DJ TFTHARDCONGSSUB Counts the time when all radio resources are occupied (hard congestion) in the overlaid subcell Measurements for Traffic Channels for Full Rate and hale Rate Connections Per Cell(CELTCHF)42Measurements for Dropped Connections

43、 on TCH per Cell(CLTCHDRH)Type Counter name Description PC TFDISTA Dropped connections at excessive TA PC TFDISSS1 Dropped connections for classmark 1 MSs, at low signal strength downlink or uplink PC TFDISSS2 Dropped connections for classmark 2 MSs, at low signal strength downlink or uplink PC TFDI

44、SSS3 Dropped connections for classmark 3 MSs, at low signal strength downlink or uplink PC TFDISSS4 Dropped connections for classmark 4 MSs, at low signal strength downlink or uplink PC TFDISSS5 Dropped connections for classmark 5 MSs, at low signal strength downlink or uplink PC DJ TFSUDLOS Suddenl

45、y lost connections PC DJ TFSUDLOSSUB Suddenly lost connections in overlaid subcell PC DJ TFDISSDL Dropped connections at low signal strength downlink PC DJ TFDISSDLSUB Dropped connections at low signal strength downlink in overlaid subcell PC DJ TFDISSUL Dropped connections at low signal strength up

46、link PC DJ TFDISSULSUB Dropped connections at low signal strength uplink in overlaid subcell PC DJ TFDISSBL Dropped connections at low signal strength bothlink PC DJ TFDISSBLSUB Dropped connections at low signal strength bothlink in overlaid subcell PC DJ TFDISQADL Dropped connections at bad quality

47、 downlink PC DJ TFDISQADLSUB Dropped connections at bad quality downlink in overlaid subcell PC DJ TFDISQAUL Dropped connections at bad quality uplink PC DJ TFDISQAULSUB Dropped connections at bad quality uplink in overlaid subcell PC DJ TFDISQABL Dropped connections at bad quality bothlink PC DJ TF

48、DISQABLSUB Dropped connections at bad quality bothlink in overlaid subcell 43Handover切换统计44正常切换相应计数器变化:HOTOKCL(1B:8F) TFCALLS(B0)HOVERCNT(95) TFMSESTB(25)HOVERSUC(1B:97)切换目标小区拥塞时相应计数器变化:45无线报表 vD231：忙时忙时SDCCH可用总数可用总数 是指本地区交换机连接的所有基站中可以正常指派的SDCCH数目。 vOBJECT TYPE ：CLSDCCH vCOUNTER NAME：CAVAACC:每10秒扫描一

49、次可用信道数，之后累积到TAVAACC； CAVASCAN: 统计时间内的扫描次数. 46v 随机接入失败随机接入失败= RAACCFA/( CNROCNT+RAACCFA)；v 随机回答= RAANPAG/ CNROCNT；v 随机其它服务= RAOSREQ/ CNROCNT；v 随机其它情况= RAOTHER/ CNROCNT；不准确v 申请次数：CCALLS；v 分配次数：CMSESTAB；v 信令接通率=CMSESTAB/CCALLS；CCH表计算公式47v 信令拥塞率=CCONGS/CCALLS；v 掉话率= CNDROP/ (CCALLS- CCONGS)?v 信道损坏率= （CN

50、UCHCNT- CAVAACC/CAVASCAN）/ CNUCHCNT；v 弱信号掉线= CDISSS/ CNDROP；v 质差掉线= CDISQA/ CNDROP；CCH表计算公式表计算公式48v 申请次数= TFCALLS； v 分配次数= TFMSESTB； v 话音接通率= TFMSESTB/ TFCALLS； v 每线话务量=TFTRALACC/（TFNSCAN*AVCH） AVCH（可用信道数）=TAVAACC/TAVASCAN； v 小区话务量=每线话务量*可用信道数 v 掉话率= TFNDROP/ D123 TCH表计算公式表计算公式 49v D123：忙时系统应答总次数忙时系

51、统应答总次数v 是指该地区交换机接受的各种用户的话音应答总次数。各种用户包括市话用户，模拟移动用户，GSM用户。话音应答次数是指不包括短消息和增值业务，包括呼叫转接的应答次数。久叫不应、系统回放录音通知、呼叫转移不成功不视为应答。统计的消息为“connect”和 ANC消息 D123 = NANSW of (ORGOEX + INT + SOTTE + SOTOEX + IEXTE + TRA) NNBRHBAISDHTOT of (all neighbour MSCs)TCH表计算公式表计算公式 50话务统计与指标处理与分析话务统计与指标处理与分析51IMLCT:SPG=0;SDTDP:RP

52、TID=201,INT=1; END；INT的时间间隔有五种取值：INT=1515分钟INT=3030分钟INT=11个小时INT=22个小时INT=2424个小时直接通过指令实时打印统计报告直接通过指令实时打印统计报告52StatisticsAnalysis and Monitor Statistics CountersTCH & SDCCH Drop Call RateTCH & SDCCH CongestionHanover Successful RateRandom Access Successful RateTCH & SDCCH AvailabilityLo

53、cation Update & PagingChannel Establishment53Monitoring the StatisticsParameters ModificationFrequency RetuneHardware ReplacementStatisticsAnalysis and Monitor Statistics CountersFrequency Retune /Parameters Changes54Drop Calls per cellLow Signal StrengthBad QualityExcessive TAMiscellaneousHando

54、ver Lost55When? When the received SS DL QLIMUL & RxQual DL QLIMDLHow to tackle the problem? Check the existing neighboring. Check for co-channel and adjacent channel interference and retune. Change the parameters depends on the problem. Check for the features. Eg: DTX / DTXU, Hopping, BTS/MS Pow

55、er Control, etc.57When? When the TA TALIMHow to tackle the problem? Check the existing neighboring Check the coverage Check the parameter TALIM & MAXTA58When? Drop Call other than Low SS, Bad Quality and Excessive TAHow to tackle the problem? Faulty Hardware, antenna and TRU. Reason other than L

56、ow SS, Bad Quality and Excessive TATransmission problemSubscribe behavior59Drop CallsVery Large no. of Drop Calls in wholesiteCheck for TransmissionLarge no. of DropCalls in one cellCheck for BTS Hardware or Transmission60Activate Features / Change ParametersLocating Parameter/Features.Drop ReasonsP

57、erform Low SS, Bad Quality, TAanalysisDrive Test / Traffic RecordingEND61SDCCH CongestionSDCCH AvailabilityCheck for HardwareBorder AreaIncrease CRH / Change Border Location Periodic Registration too oftenIncrease T321262Long SDCCH MHT ?.Interference?Frequency RetuneTCH Congestion?TCH ExpansionSigna

58、l LinkCongestion/Problem?Check for Transmission,BSC and MSC63If NO, Add another TS to SDCCHTCH Congestion ?.Expansion ?If Yes, Add another TRUReduce Idle ModeCoverage AreaChange ACCMIN, CRO, PT, CBQEND64TCH CongestionTCH AvailabilityCheck for HardwareExpansionIf Yes, Add another TRUSDCCH Heavily Con

59、gested?Change another TS to SDCCH65ActivateCell Load Sharing ?.Parameters Change?Koffset, LAYERTHR, LAYERReduce Idle ModeCoverage AreaChange POWER, ACCMIN, CRO, PT, CBQEND66Poor Handover PerformanceUnnecessary HO?RemoveCheck HO parameters Koffset, BCCH/BSIC, BA List etcMake the necessary adjustmentH

60、ardware Problem in Ncell?Remove67Change BCCH or BSICNcell with co channel& co BSIC ?.TCH InterferenceCheck interferesCongestion in NcellSolve the congestion68High Random Access FailureCheck co-bcchno & BSIC cellsRetune Frequency / BSICCheck MAXTA SettingIncrease MAXTAHardware Problem?ReplaceSite Location? - High SiteLower antenna69Drive Test