cdma正常信及异常信分析呼叫处理流程及网络优化课件

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1、cdma正常信令及异常信令分析呼叫处理流程及网络优化呼叫处理流程及网络优化呼叫处理流程及网络优化cdma正常信令及异常信令分析呼叫处理流程及网络优化内容 第一部分 呼叫流程 第二部分 常规掉话、接入失败及掉话分析。cdma正常信令及异常信令分析呼叫处理流程及网络优化cdma呼叫过程呼叫过程第一部分第一部分cdma正常信令及异常信令分析呼叫处理流程及网络优化CDMA 呼叫处理 Acquisition of the CDMA System Idle Mode Handoff Registration Termination Origination End of a Call Handoffcdma

2、正常信令及异常信令分析呼叫处理流程及网络优化手机是怎么工作的?ReceiverRF SectionIF, DetectorTransmitterRF SectionVocoderDigital Rake ReceiverTraffic CorrelatorPN xxxWalsh xxS STraffic CorrelatorPN xxxWalsh xxTraffic CorrelatorPN xxxWalsh xxPilot SearcherPN xxxWalsh 0DecoderCPUDuplexerTransmitterDigital SectionLong Code Gen.Open L

3、oopTransmit Gain AdjustMessagesMessagesAudioAudioPacketsSymbolsSymbolsChipsRFRFAGCcdma正常信令及异常信令分析呼叫处理流程及网络优化Acquisition of the CDMA SystemCDMA 呼叫过程呼叫过程cdma正常信令及异常信令分析呼叫处理流程及网络优化手机找到一个频率Mobile scans forward link frequencies:(Cellular or PCS, depending on model)History ListPreferred Roaming Listuntil

4、a CDMA signal is found.NO CDMA?! Go to AMPS, or to a power-saving standby modeHISTORYLISTLast-used:Freq/SID xFreq/SID yFreq/SID zFreq/SID tFreq/SID uetc.FREQUENCY LISTS:PREFERREDROAMINGLISTFreq/SID 1Freq/SID 2Freq/SID 3Freq/SID 4Freq/SID 5etc.Forward Link Frequencies(Base Station Transmit)ADBEFCunli

5、c.dataunlic.voiceADBEFC1850MHz.1910MHz.1990 MHz.1930MHz.1900 MHz. PCS Spectrum824 MHz.835845870880894869849846.5825890891.5Paging, ESMR, etc.ABAB800 MHz. Cellular SpectrumReverse Link Frequencies(Mobile Transmit)cdma正常信令及异常信令分析呼叫处理流程及网络优化手机发现最强的导频信号, 读取同步信道信息Rake FingersReference PNActive PilotEc/Io

6、0032K512ChipsPN1. Pilot Searcher 扫描全部扫描全部PNAll PN Offsets0-2098/05/24 23:14:09.817 SCH Sync Channel MessageMSG_LENGTH = 208 bitsMSG_TYPE = Sync Channel MessageP_REV = 3MIN_P_REV = 2SID = 179NID = 0PILOT_PN = 168Offset IndexLC_STATE = 0 x0348D60E013SYS_TIME = 98/05/24 23:14:10.160LP_SEC = 12LTM_OFF =

7、 -300 minutesDAYLT = 0PRAT = 9600 bpsRESERVED = 12. 解码解码 Walsh 32, 读取同步信息。读取同步信息。SYNC CHANNEL MESSAGEHandsetRake ReceiverRFxLOSrch PN? W0F1 PN168 W32F2 PN168 W32F3 PN168 W32cdma正常信令及异常信令分析呼叫处理流程及网络优化配置信息 读完同步信息后，手机开始读寻呼信道消息，并开始不停监测该信道。 在通话前，手机必须收集到完整的配置信息。 配置信息每 1.28 seconds会重复。 有新的消息手机会更新，如没有600S手机

8、也会更新一次cdma正常信令及异常信令分析呼叫处理流程及网络优化手机到寻呼信道获得配置信息Rake FingersReference PNActive PilotEc/Io0032K512ChipsPNAll PN Offsets0-20Keep Rake finger(s) on strongest available PN, decode Walsh 1, and monitor the Paging ChannelRead the Configuration MessagesAccess Parameters MsgSystem Parameters MsgCDMA Channel Li

9、st MsgExtended System Parameters Msg (*opt.)(Extended*) NeighborList MsgGlobal ServiceRedirection Msg (*opt.)Now were ready to operate!HandsetRake ReceiverRFxLOSrch PN? W0F1 PN168 W01F2 PN168 W01F3 PN168 W01cdma正常信令及异常信令分析呼叫处理流程及网络优化2个重要的配置信息98/05/24 23:14:10.427 PCH MSG_LENGTH = 184 bitsMSG_TYPE =

10、Access Parameters MessagePILOT_PN = 168 Offset IndexACC_MSG_SEQ = 27ACC_CHAN = 1 channelNOM_PWR = 0 dB INIT_PWR = 0 dB PWR_STEP = 4 dBNUM_STEP = 5 Access Probes MaximumMAX_CAP_SZ = 4 Access Channel Frames MaximumPAM_SZ = 3 Access Channel FramesPersist Val for Acc Overload Classes 0-9 = 0Persist Val

11、for Acc Overload Class 10 = 0Persist Val for Acc Overload Class 11 = 0Persist Val for Acc Overload Class 12 = 0Persist Val for Acc Overload Class 13 = 0Persist Val for Acc Overload Class 14 = 0Persist Val for Acc Overload Class 15 = 0Persistance Modifier for Msg Tx = 1 Persistance Modifier for Reg =

12、 1 Probe Randomization = 15 PN chipsAcknowledgement Timeout = 320 msProbe Backoff Range = 4 Slots MaximumProbe Sequence Backoff Range = 4 Slots Max.Max # Probe Seq for Requests = 2 SequencesMax # Probe Seq for Responses = 2 SequencesAuthentication Mode = 1Random Challenge Value = Field OmittedReserv

13、ed Bits = 99ACCESS PARAMETERS MESSAGE98/05/24 23:14:11.126 PCH System Parameter MessageMSG_LENGTH = 264 bitsMSG_TYPE = System Parameters MessagePILOT_PN = 168 Offset IndexCONFIG_MSG_SEQ = 0SID = 179 NID = 0REG_ZONE = 0 TOTAL_ZONES = 0 ZONE_TIMER = 60 minMULT_SIDS = 0 MULT_NID = 0 BASE_ID = 8710BASE_

14、CLASS = Public MacrocellularPAGE_CHAN = 1 channelMAX_SLOT_CYCLE_INDEX = 0HOME_REG = 0 FOR_SID_REG = 0 FOR_NID_REG = 1POWER_UP_REG = 0 POWER_DOWN_REG = 0PARAMETER_REG = 1 REG_PRD = 0.08 secBASE_LAT = 00D0000.00N BASE_LONG = 000D0000.00EREG_DIST = 0SRCH_WIN_A = 40 PN chipsSRCH_WIN_N = 80 PN chipsSRCH_

15、WIN_R = 80 PN chipsNGHBR_MAX_AGE = 0PWR_REP_THRESH = 2 framesPWR_REP_FRAMES = 56 framesPWR_THRESH_ENABLE = 1PWR_PERIOD_ENABLE = 0PWR_REP_DELAY = 20 framesRESCAN = 0T_ADD = -13.0 Db T_DROP = -15.0 dB T_COMP = 2.5 dBT_TDROP = 4 secEXT_SYS_PARAMETER = 1RESERVED = 0GLOBAL_REDIRECT = 0SYSTEM PARAMETERS M

16、ESSAGEcdma正常信令及异常信令分析呼叫处理流程及网络优化4个另外的配置信息98/05/24 23:14:10.946 PCH Extended System Parameters MessageMSG_LENGTH = 104 bitsMSG_TYPE = Extended System Parameters MessagePILOT_PN = 168 Offset IndexCONFIG_MSG_SEQ = 0 RESERVED = 0PREF_MSID_TYPE = IMSI and ESNMCC = 000 IMSI_11_12 = 00 RESERVED_LEN = 8 bit

17、sRESERVED_OCTETS = 0 x00 BCAST_INDEX = 0RESERVED = 0EXTENDED SYSTEM PARAMETERS98/05/17 24:21.566 Paging Channel: Global Service RedirectionPILOT_PN: 168, MSG_TYPE: 96, CONFIG_MSG_SEQ: 0Redirected access overload classes: 0, 1 , RETURN_IF_FAIL: 0, DELETE_TMSI: 0, Redirection to an analog system: EXPE

18、CTED_SID = 0 Do not ignore CDMA Available indicator on the redirected analog systemAttempt service on either System A or B with the custom system selection processGLOBAL SERVICE REDIRECTION98/05/24 23:14:11.486 PCH Neighbor List MessageMSG_LENGTH = 216 bitsMSG_TYPE = Neighbor List MessagePILOT_PN =

19、168 Offset IndexCONFIG_MSG_SEQ = 0PILOT_INC = 4 Offset IndexNGHBR_CONFIG = 0 NGHBR_PN = 220 Offset IndexNGHBR_CONFIG = 0 NGHBR_PN = 52 Offset IndexNGHBR_CONFIG = 0 NGHBR_PN = 500 Offset IndexNGHBR_CONFIG = 0 NGHBR_PN = 8 Offset IndexNGHBR_CONFIG = 0 NGHBR_PN = 176 Offset IndexNGHBR_CONFIG = 0 NGHBR_

20、PN = 304 Offset IndexNGHBR_CONFIG = 0 NGHBR_PN = 136 Offset IndexNGHBR_CONFIG = 0 NGHBR_PN = 384 Offset IndexNGHBR_CONFIG = 0 NGHBR_PN = 216 Offset IndexNGHBR_CONFIG = 0 NGHBR_PN = 68 Offset IndexNGHBR_CONFIG = 0 NGHBR_PN = 328 Offset IndexNGHBR_CONFIG = 0 NGHBR_PN = 112 Offset IndexRESERVED = 0NEIG

21、HBOR LIST98/05/24 23:14:10.786 PCH CDMA Channel List MessageMSG_LENGTH = 72 bitsMSG_TYPE = CDMA Channel List MessagePILOT_PN = 168 Offset IndexCONFIG_MSG_SEQ = 0CDMA_FREQ = 283RESERVED = Field OmittedCDMA CHANNEL LIST MESSAGEcdma正常信令及异常信令分析呼叫处理流程及网络优化Idle 模式下的切换模式下的切换CDMA 呼叫流程呼叫流程cdma正常信令及异常信令分析呼叫处理

22、流程及网络优化Idle 模式下的切换 Idle模式下总是解调最强信号。 手机不停搜索临区的导频。 如果手机发现更好的信号，就切换上去，基站并不知道。cdma正常信令及异常信令分析呼叫处理流程及网络优化Idle 模式下的手机行为Ec/IoAll PN Offsets0032K512ChipsPN0-20Neighbor SetThe phones pilot searcher constantly checks the pilots listed in the Neighbor List MessageIf the searcher ever notices a neighbor pilot s

23、ubstantially stronger than the current reference pilot, it becomes the new reference pilot and the phone switches over to its paging channel on the next superframe.This is called an idle mode handoff.Rake FingersReference PNActive PilotSRCH_WIN_ASRCH_WIN_NMobile Rake RXSrch PN? W0F1 PN168 W01F2 PN16

24、8 W01F3 PN168 W01cdma正常信令及异常信令分析呼叫处理流程及网络优化手机在接入信道的操作 1个寻呼信道对应32个接入信道. 接入信道在开环模式下工作! 手机探针工作如下： If “probe” not acknowledged by BTS within ACC_TMO (400 mS.), phone will wait a random time (200 mS) then probe again, stronger by PI db. There can be 15 max. (typ. 5) probes in a sequence and 15 max. (typ.

25、 2) sequences in an access attempt most attempts succeed on first probe!ACCESSRV TFCBTSChannel Assnmt. Msg.Origination MsgBase Sta. Acknlgmt. OrderTFC frames of 000sTFC preamble of 000sBase Sta. Acknlgmt. OrderMobile Sta. Ackngmt. OrderService Connect Msg.Svc. Connect Complete MsgBase Sta. Acknlgmt.

26、 OrderCall is Established!MSProbingPAGINGFW TFCPAGINGRV TFCFW FCRV TFCFW TFCFW TFCA Successful Access Attempt a Probe Sequencean Access AttemptSuccess! an Access Probecdma正常信令及异常信令分析呼叫处理流程及网络优化登记登记CDMA 呼叫处理过程呼叫处理过程cdma正常信令及异常信令分析呼叫处理流程及网络优化登记 登记就是空闲模式下的手机让系统知道它在等待呼入电话。 this allows the system to info

27、rm the mobiles home switch of the mobiles current location, so that incoming calls can be delivered registration also allows the system to intelligently page the mobile only in the area where the mobile is currently located, thereby eliminating useless congestion on the paging channels in other area

28、s of the system There are many different conditions that could trigger an obligation for the mobile to register there are flags in the System Parameters Message which tell the mobile when it must register on the current systemcdma正常信令及异常信令分析呼叫处理流程及网络优化一个登记实例16:18:27.144 Access Channel: Registration

29、ACK_SEQ: 7 MSG_SEQ: 1 ACK_REQ: 1 VALID_ACK: 0ACK_TYPE: 0MSID_TYPE: 3, ESN: 0 x 01 99 0d fcMFR 1, Reserved 38, Serial Number 69116,IMSI: (Class: 0, Class_0_type: 1) 0 x 01 8d 31 74 29 3600-416-575-0421AUTH_MODE: 0REG_TYPE: Timer-basedSLOT_CYCLE_INDEX: 2MOB_P_REV: 1EXT_SCM: 1SLOTTED_MODE: 1MOB_TERM: 1

30、REGISTRATION MESSAGE18:26.826 PCH System Parameters Message Pilot_PN: 32CONFIG_MSG_SEQ: 14 SID: 16420 NID: 0,REG_ZONE: 0 TOTAL_ZONES: 0 Zone timer length (min): 1MULT_SIDS: 0 MULT_NIDS: 0 BASE_ID: 1618 BASE_CLASS: ReservedPAG_CHAN: 1 MAX_SLOT_CYCLE_INDEX: 2 HOME_REG: 1 FOR_SID_REG: 1 FOR_NID_REG: 1,

31、 POWER_UP_REG: 1 POWER_DOWN_REG: 1 PARAMETER_REG: 1 Registration period (sec): 54 Base station 00000.00 Lon., 00000.00 Lat. REG_DIST: 0SRCH_WIN_A (PN chips): 28 SRCH_WIN_N (PN chips): 100, SRCH_WIN_R (PN chips): 130 NGHBR_MAX_AGE: 2PWR_REP_THRESH: 2 PWR_REP_FRAMES (frames): 15PWR_THRESH_ENABLE: 1 PW

32、R_PERIOD_ENABLE: 0, PWR_REP_DELAY: 1 (4 frames) RESCAN: 0, T_ADD: -14.0dB T_DROP: -16.0dB T_COMP: 2.5dB, T_TDROP: 4s EXT_SYS_PARAMETER: 1 EXT_NGHBR_LIST: 1 GLOBAL_REDIRECT: 0SYSTEM PARAMETERS MESSAGE16:18:27.506 Paging Channel: Order ACK_SEQ: 1 MSG_SEQ: 0 ACK_REQ: 0 VALID_ACK: 1 MSID_TYPE: 2 IMSI: (

33、Class: 0, Class_0_type: 3) 0 x 02 47 8d 31 74 29 36 (302) 00-416-575-0421Order type: Base Station Acknowledgement OrderBASE STATION ACKNOWLEDGMENTThe System Parameters Message tells all mobiles when they should register.This mobile notices that it is obligated to register, so it transmits a Registra

34、tion Message.The base station confirms that the mobiles registration message was received. Were officially registered!cdma正常信令及异常信令分析呼叫处理流程及网络优化起呼起呼CDMA 呼叫处理流程呼叫处理流程cdma正常信令及异常信令分析呼叫处理流程及网络优化手机起呼 手机用户按 SEND键. 手机发射 Origination Message 在接入信道上. 系统在寻呼信道上确认接受到该消息. 系统为呼叫准备资源. 基站在寻呼信道上发Channel Assignment M

35、essage. 手机和基站在业务信道关注相互确认消息。. 呼叫建立完成.cdma正常信令及异常信令分析呼叫处理流程及网络优化手机起呼17:48:53.144 Access Channel: Origination ACK_SEQ: 7 MSG_SEQ: 6 ACK_REQ: 1 VALID_ACK: 0 ACK_TYPE: 0 MSID_TYPE: 3 ESN: 0 x 00 06 98 24 MFR 0 Reserved 1 Serial Number 170020 IMSI: (Class: 0, Class_0_type: 0) 0 x 03 5d b8 97 c2 972-849-50

36、73AUTH_MODE: 0 MOB_TERM: 1SLOT_CYCLE_INDEX: 2 MOB_P_REV: 1 EXT_SCM: 1DualMode: 0 SLOTTED_MODE: 1 PowerClass: 0REQUEST_MODE: CDMA only SPECIAL_SERVICE: 1 Service option: (6) Voice (13k) (0 x8000) PM: 0 DIGIT_MODE: 0 MORE_FIELDS: 0 NUM_FIELDS: 11Chari: NAR_AN_CAP: 0ORIGINATION MESSAGE17:48:53.487 Pagi

37、ng Channel: Order ACK_SEQ: 6 MSG_SEQ: 0 ACK_REQ: 0 VALID_ACK: 1 MSID_TYPE: 2IMSI: (Class: 0, Class_0_type: 0) 0 x 03 5d b8 97 c2 972-849-5073 Base Station Acknowledgement OrderBASE STATION ACKNOWLEDGMENTThe mobile sends an origination message on the access channel.The base station confirms that the

38、origination message was received.17:48:54.367 Paging Channel: Channel Assignment ACK_SEQ: 6 MSG_SEQ: 1 ACK_REQ: 0 VALID_ACK: 1MSID_TYPE: 2 IMSI: (Class: 0, Class_0_type: 0) 0 x 03 5d b8 97 c2 972-849-5073 ASSIGN_MODE: Traffic Channel Assignment, ADD_RECORD_LEN: 5 FREQ_INCL: 1 GRANTED_MODE: 2CODE_CHA

39、N: 12 FRAME_OFFSET: 0 ENCRYPT_MODE: Encryption disabled BAND_CLASS: 1.8 to 2.0 GHz PCS band CDMA_FREQ: 425CHANNEL ASSIGNMENT MESSAGEThe base station sends a Channel Assignment Message and the mobile goes to the traffic channel. cdma正常信令及异常信令分析呼叫处理流程及网络优化业务信道确认17:48:54.835 Reverse Traffic Channel: Or

40、der ACK_SEQ: 0 MSG_SEQ: 0 ACK_REQ: 0 ENCRYPTION: 0 Mobile Station Acknowledgement OrderMOBILE STATION ACKNOWLEDGMENT17:48:54.757 Forward Traffic Channel: Order ACK_SEQ: 7 MSG_SEQ: 0 ACK_REQ: 1 ENCRYPTION: 0USE_TIME: 0 ACTION_TIME: 0 Base Station Acknowledgement OrderBASE STATION ACKNOWLEDGMENTThe ba

41、se station is already sending blank frames on the forward channel,using the assigned Walsh code.The mobile sees at least two good blank frames in a row on the forward channel, and concludes this is the right traffic channel. It sends a preamble of two blank frames of its own on the reverse traffic c

42、hannel.The base station acknowledges receiving the mobiles preamble.The mobile station acknowledges the base stations acknowledgment.Everybody is ready!cdma正常信令及异常信令分析呼叫处理流程及网络优化连接完成Now the switch completes the audio circuit and the two callers can talk!17:48:55.137 Reverse Traffic Channel: Service

43、Connect Completion ACK_SEQ: 1, MSG_SEQ: 0, ACK_REQ: 1, ENCRYPTION: 0, SERV_CON_SEQ: 0SERVICE CONNECT COMPLETE MSG.17:48:55.098 Forward Traffic Channel: Service Connect ACK_SEQ: 7 MSG_SEQ: 1 ACK_REQ: 1 ENCRYPTION: 0USE_TIME: 0 ACTION_TIME: 0 SERV_CON_SEQ: 0 Service Configuration Supported Transmissio

44、n: Forward Traffic Channel Rate (Set 2): 14400, 7200, 3600, 1800 bpsReverse Traffic Channel Rate (Set 2): 14400, 7200, 3600, 1800 bpsService option: (6) Voice (13k) (0 x8000) Forward Traffic Channel: Primary TrafficReverse Traffic Channel: Primary TrafficSERVICE CONNECT MESSAGENow that the traffic c

45、hannel is working in both directions, the base station proposes that the requested call actually begin.The mobile agrees and says its ready to play.17:48:55.779 Forward Traffic Channel: Order ACK_SEQ: 0 MSG_SEQ: 0 ACK_REQ: 0 ENCRYPTION: 0USE_TIME: 0 ACTION_TIME: 0 Base Station Acknowledgement OrderB

46、ASE STATION ACKNOWLEDGMENTThe base station agrees.SERVICE CONNECT COMPLETE is a major milestone in call processing. Up until now, this was an access attempt. Now it is officially a call.cdma正常信令及异常信令分析呼叫处理流程及网络优化被叫被叫CDMA 呼叫处理过程呼叫处理过程cdma正常信令及异常信令分析呼叫处理流程及网络优化一个实际的来电呼叫98/05/24 23:14:46.425 ACH Page R

47、esponse MessageMSG_LENGTH = 216 bitsMSG_TYPE = Page Response MessageACK_SEQ = 1 MSG_SEQ = 2 ACK_REQ = 1VALID_ACK = 1 ACK_TYPE = 2MSID_TYPE = IMSI and ESN MSID_LEN = 9 octetsESN = 0 xD30E415C IMSI_CLASS = 0IMSI_CLASS_0_TYPE = 0 RESERVED = 0IMSI_S = 6153300644AUTH_MODE = 1AUTHR = 0 x307B5 RANDC = 0 xC

48、6 COUNT = 0MOB_TERM = 1 SLOT_CYCLE_INDEX = 0MOB_P_REV = 3 SCM = 106REQUEST_MODE = Either Wide Analog or CDMA OnlySERVICE_OPTION = 32768 PM = 0NAR_AN_CAP = 0 RESERVED = 0PAGE RESPONSE MESSAGE98/05/24 23:14:46.127 PCH General Page MessageMSG_LENGTH = 128 bits MSG_TYPE = General Page MessageCONFIG_MSG_

49、SEQ = 1 ACC_MSG_SEQ = 20CLASS_0_DONE = 1CLASS_1_DONE = 1 RESERVED = 0BROADCAST_DONE = 1 RESERVED = 0ADD_LENGTH = 0 bits ADD_PFIELD = Field OmittedPAGE_CLASS = 0 PAGE_SUBCLASS = 0MSG_SEQ = 1 IMSI_S = 6153300644SPECIAL_SERVICE = 1SERVICE_OPTION = 32768RESERVED = Field OmittedGENERAL PAGE MESSAGE98/05/

50、24 23:14:46.768 PCH Order MessageMSG_LENGTH = 112 bitsMSG_TYPE = Order MessageACK_SEQ = 2 MSG_SEQ = 0 ACK_REQ = 0VALID_ACK = 1 ADDR_TYPE = IMSI ADDR_LEN = 40 bitsIMSI_CLASS = 0 IMSI_CLASS_0_TYPE = 0 RESERVED = 0 IMSI_S = 6153300644ORDER = Base Station Acknowledgement OrderADD_RECORD_LEN = 0 bitsOrde

51、r-Specific Fields = Field Omitted RESERVED = 0BASE STATION ACKNOWLEDGMENTThe system pages the mobile, 615-330-0644.The base station confirms that the mobiles page response was received. Now the mobile is waiting for channel assignment,expecting a response within 12 seconds.The mobile responds to the

52、 page.cdma正常信令及异常信令分析呼叫处理流程及网络优化信道分配和业务信道确认18:14:47.598 Reverse Traffic Channel: Order ACK_SEQ: 0 MSG_SEQ: 0 ACK_REQ: 0 ENCRYPTION: 0Mobile Station Acknowledgement OrderMOBILE STATION ACKNOWLEDGMENT18:14:47.027 Paging Channel: Channel Assignment ACK_SEQ: 2 MSG_SEQ: 1 ACK_REQ: 0 VALID_ACK: 1MSID_TYPE

53、: 2 IMSI: (Class: 0, Class_0_type: 0) 0 x 01 f8 39 6a 15 615-330-0644 ASSIGN_MODE: Traffic Channel AssignmentADD_RECORD_LEN: 5 FREQ_INCL: 1 GRANTED_MODE: 2CODE_CHAN: 43 FRAME_OFFSET: 2ENCRYPT_MODE: Encryption disabledBAND_CLASS: 800 MHz cellular bandCDMA_FREQ: 283CHANNEL ASSIGNMENT MESSAGE18:14:47.5

54、81 Forward Traffic Channel: Order ACK_SEQ: 7 MSG_SEQ: 0 ACK_REQ: 1 ENCRYPTION: 0 USE_TIME: 0 ACTION_TIME: 0Base Station Acknowledgement OrderBASE STATION ACKNOWLEDGMENTOnly about 400 ms. after the base station acknowledgment order, the mobile receives the channel assignment message.The base station

55、is already sending blank frames on the forward channel,using the assigned Walsh code.The mobile sees at least two good blank frames in a row on the forward channel, and concludes this is the right traffic channel. It sends a preamble of two blank frames of its own on the reverse traffic channel.The

56、base station acknowledges receiving the mobiles preamble.The mobile station acknowledges the base stations acknowledgment.Everybody is ready!cdma正常信令及异常信令分析呼叫处理流程及网络优化呼叫建立完成18:14:47.835 Reverse Traffic Channel: Service Connect Completion ACK_SEQ: 1 MSG_SEQ: 3 ACK_REQ: 1 ENCRYPTION: 0 SERV_CON_SEQ: 0

57、SERVICE CONNECT COMPLETE MSG.18:14:47.760 Forward Traffic Channel: Service Connect ACK_SEQ: 0 MSG_SEQ: 1 ACK_REQ: 0 ENCRYPTION: 0USE_TIME: 0 ACTION_TIME: 0 SERV_CON_SEQ: 0Service Configuration: supported Transmission: Forward Traffic Channel Rate (Set 2): 14400, 7200, 3600, 1800 bps Reverse Traffic

58、Channel Rate (Set 2): 14400, 7200, 3600, 1800 bps Service option: (6) Voice (13k) (0 x8000) Forward Traffic Channel: Primary Traffic Reverse Traffic Channel: Primary TrafficSERVICE CONNECT MESSAGENow that both sides have arrived on the traffic channel, the base station proposes that the requested ca

59、ll actually begin.The mobile agrees and says its ready to play.18:14:47.961 Forward Traffic Channel: Alert With Information ACK_SEQ: 3 MSG_SEQ: 1 ACK_REQ: 1 ENCRYPTION: 0SIGNAL_TYPE = IS-54B Alerting ALERT_PITCH = Medium Pitch (Standard Alert)SIGNAL = Long RESERVED = 0RECORD_TYPE = Calling Party Num

60、berRECORD_LEN = 96 bitsNUMBER_TYPE = National NumberNUMBER_PLAN = ISDN/Telephony Numbering PlanPI = Presentation Allowed SI = Network ProvidedCHARi = 6153000124 RESERVED = 0 RESERVED = 0ALERT WITH INFORMATION MESSAGEThe base station orders the mobile to ring, and gives it the calling partys number t

61、o display.18:14:48.018 Reverse Traffic Channel: Order ACK_SEQ: 1 MSG_SEQ: 4 ACK_REQ: 0ENCRYPTION: 0 Mobile Station Acknowledgement OrderThe mobile says its ringing.SERVICE CONNECT COMPLETE is a major milestone in call processing. Up until now, this was an access attempt. Now it is officially a call.

62、cdma正常信令及异常信令分析呼叫处理流程及网络优化正式通话The mobile has been ringing for several seconds. The human user finally comes over and presses the send button to answer the call.Now the switch completes the audio circuit and the two callers can talk!18:14:54.920 Forward Traffic Channel: Order ACK_SEQ: 0 MSG_SEQ: 1 AC

63、K_REQ: 0 ENCRYPTION: 0 USE_TIME: 0 ACTION_TIME: 0 Base Station Acknowledgement OrderBASE STATION ACKNOWLEDGMENT18:14:54.758 Reverse Traffic Channel: Order ACK_SEQ: 6 MSG_SEQ: 0 ACK_REQ: 1 ENCRYPTION: 0 Connect OrderCONNECT ORDERcdma正常信令及异常信令分析呼叫处理流程及网络优化结束一个通话结束一个通话CDMA 呼叫处理过程呼叫处理过程cdma正常信令及异常信令分析呼叫

64、处理流程及网络优化正常通话结束17:49:21.715 Reverse Traffic Channel: Order ACK_SEQ: 1 MSG_SEQ: 1 ACK_REQ: 1 ENCRYPTION: 0 Release Order (normal release)MOBILE RELEASE ORDERBASE STATION ACKNOWLEDGMENT17:49:21.936 Forward Traffic Channel: Order ACK_SEQ: 1 MSG_SEQ: 2 ACK_REQ: 0 ENCRYPTION: 0, USE_TIME: 0 ACTION_TIME:

65、0 Base Station Acknowledgement OrderAt the end of a normal call, this mobile user pressed end.The mobile left the traffic channel, scanned to find the best pilot, and read the Sync Channel Message.BASE STATION RELEASE ORDER17:49:21.997 Forward Traffic Channel: Order ACK_SEQ: 1 MSG_SEQ: 3 ACK_REQ: 0

66、ENCRYPTION: 0USE_TIME: 0 ACTION_TIME: 0 Release Order (no reason given)17:49:22.517 Sync Channel MSG_TYPE: 1 Sync Channel MessageP_REV: 1 MIN_P_REV: 1SID: 4112 NID: 2 Pilot_PN: 183 LC_STATE: 0 x318fe5d84a5 SYS_TIME: 0 x1ae9683dcLP_SEC: 9 LTM_OFF: -10 DAYLT: 1 Paging Channel Data Rate: 9600 CDMA_FREQ: 425SYNC CHANNEL MESSAGEThe base station acknowledged receiving the message, then sent a release message of its own.cdma正常信令及异常信令分析呼叫处理流程及网络优化切换切换CDMA 呼叫处理过程呼叫处理过程cdma正常信令及异常信令分析呼叫处理流程及网络优化呼叫已经建立了，手机