gsm無(wú)線網(wǎng)絡(luò)優(yōu)化及詳細(xì)信道解釋(已修改)
2025-01-31 07:54 本頁(yè)面
【正文】 GSM 技術(shù)交流 GSM 無(wú)線網(wǎng)絡(luò)優(yōu)化 2 移動(dòng)主叫（ MO）過(guò)程 BSS VMSC VLR VPLMN IAM（ ISUP） SIFOC Complete call Um A B IAM : Initial address message ISUP : ISDN user part SIFOC : Send information for outgoing call 參見(jiàn) GSM 3 MO 信令流程 MS VMSC VLR BSS CM service req CM service req Process access req Authenticate Authenticate Authenticate Authenticate resp Authenticate resp Authenticate ack Set cipher mode Start ciphering Cipher mode cmd Process access req ack Cipher mode p Cipher mode p setup SIFOC Complete call Allocate channel Assignment cmd Assignment p Allocation plete Call proceeding IAM ACM ANM Alert Connect Connect ack 參見(jiàn) GSM 4 移動(dòng)被叫（ MT）過(guò)程 BSS VMSC VLR VPLMN IAM (ISUP) SIFIC Page/ack Complete call Um A B 參見(jiàn) GSM GMSC HLR IAM (ISUP) Send routeing info/ack Provide roaming number/ack 5 MT獲取路由信息 GMSC VMSC VLR HLR SRI IAM PRN PRN ack SRI ack IAM SRI: Send Routeing Information PRN: Provide Roaming Number IAM: Initial Address Message 參見(jiàn) GSM 6 江蘇 上海 北京 MSRN路由接續(xù)的機(jī)理 TMSC MSC/VLR TMSC GMSC IAM HLR MSC/VLR TMSC MSC/VLR 021 021 6495 SRI PRN “13901234567” 02164957700 6495xxxx 6485xxxx 02164957700 MSRN MSISDN MSRN 64957700 64957701 6495ABCD “13901234567” 0123 HLR號(hào) 7 GMSC VLR VMSC BSS MS IAM SIFIC Page MS Page Page Chan req Imm ass Page resp MS conn estab Process Access req Set cipher mode Process Access req ack Start ciphering Cipher mode cmd Cipher mode cmp Cipher mode cmp Complete call Setup Call conf Allocate chan Ass cmd Ass cmp Allocation cmp Allerting ACM Connect ANM Connect ack Complete call ack 移動(dòng)被叫流程 參見(jiàn) GSM 8 位置更新過(guò)程 VLR HLR VLR BSS VMSC Um A B new old Loc upt cancellation Id inquiring Location Update 的起因： 1） SIM卡第一次使用 2）位置區(qū)發(fā)生變化 3）周期位置更新 4） IMSI attach/dettache D D G 參見(jiàn) GSM 9 位置更新流程 (1) 在同一 MSC中的位置更新 MS VMSC VLR BSS Loc upd req Loc upd req Loc area upd Authenticate Authenticate Authenticate Authenticate resp Authenticate resp Authenticate ack Set cipher mode Start ciphering Cipher mode cmd Loc upd acc Cipher mode p Cipher mode p Loc upd acc TMSI ack TMSI reallocation cmp 參見(jiàn) GSM 10 位置更新流程 (2) 在同一 VLR但不同 MSC中的位置更新 MS VMSC VLR BSS Loc upd req Loc upd req Loc area upd Authenticate Authenticate Authenticate Authenticate resp Authenticate resp Authenticate ack Set cipher mode Start ciphering Cipher mode cmd Loc upd acc Cipher mode p Cipher mode p Loc upd acc TMSI ack TMSI reallocation cmp HLR Loc upd req Loc upd ack 參見(jiàn) GSM 11 位置更新流程 (3) 在新的 VLR中的位置更新，原 VLR可及 MS VMSC VLRn BSS Loc upd req Loc upd req Loc area upd Auth. Auth. Auth. Auth. resp Auth. resp Auth. ack Set ciph. mode Start ciphering Ciph. mode cmd Loc upd acc Ciph. mode cmp Ciph. mode cmp Loc upd acc TMSI ack TMSI reallocation cmp HLR Loc upd req Loc upd ack VLRo Id req Id resp Cancellation. Cancellation ack 參見(jiàn) GSM 12 位置更新流程 (4) 在新的 VLR中的位置更新，原 VLR不可及 MS VMSC VLRn BSS Loc upd req Loc upd req Loc area upd Auth. Auth. Auth. Auth. resp Auth. resp Auth. ack Set ciph. mode Start ciphering Ciph. mode cmd Loc upd acc Ciph. mode cmp Ciph. mode cmp Loc upd acc TMSI ack TMSI reallocation cmp HLR Loc upd req Loc upd ack VLRo Cancellation. Cancellation ack Id req. Id req. Id req. Id resp Id resp Id resp 參見(jiàn) GSM 13 位置更新流程 (5) 在新的 VLR中的位置更新，原 VLR可及，但信息丟失 MS VMSC VLRn BSS Loc upd req Loc upd req Loc area upd Auth. Auth. Auth. Auth. resp Auth. resp Auth. ack Set ciph. mode Start ciphering Ciph. mode cmd Loc upd acc Ciph. mode cmp Ciph. mode cmp Loc upd acc TMSI ack TMSI reallocation cmp HLR Loc upd req Loc upd ack VLRo Cancellation. Cancellation ack Id req. Id req. Id req. Id resp Id resp Id resp unknown Id req. 參見(jiàn) GSM 14 用戶身份鑒權(quán)過(guò)程 參見(jiàn) GSM Um 網(wǎng)絡(luò) A3 A3 ? = Yes/no Ki RAND RAND SRES Ki ( Authentication req. ) ( Authentication resp. ) Ki : individual subscriber authentication key 15 安全相關(guān)信息獲取 VMSCVLR Security Related Infomation Request HLR/AuC A3 Ki RAND產(chǎn)生 參見(jiàn) GSM Authentication Vector Response SRES(1
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