GSM信令流程_CN(核心.ppt

MS,BSC,BTS,MSC,主叫流程之一,主叫流程之二,MS,BSC,BTS,MSC,MS,BSC,BTS,MSC,主叫流程之三,被叫流程之一,MS,BSC,BTS,MSC,被叫流程之二,MS,BSC,BTS,MSC,MS,BSC,BTS,MSC,被叫流程之三,MS,BSC,BTS,MSC,位置更新流程之一,MS,BSC,BTS,MSC,位置更新流程之二,MS,BSC,BTS1,BTS2,內(nèi)部切換流程,MS,MSC,BSS1,BSS2,外部切換流程,信道請求(Channel Request) ESTABLISHMENT CAUSE(36bit) RANDOM REFERENCE(52bit),信道要求(Channel Required) Request Referenc(包括random reference 和部分幀號) Access Delay(BTS測量得到的時延),信道激活(Channel Activation) Channel number Activation type(3bit,立即指配、指配、切換等) Channel Mode(表示話音、數(shù)據(jù)或信令，以及相應(yīng)屬性) Channel Identification(絕對頻道號或跳頻參數(shù)) Handover Reference(條件：切換) Timing Advance(條件：小區(qū)內(nèi)信道改變),信道激活證實(Channel Activation Ack) Frame Number,立即指配命令(Immediate assign command) Full Imm. Assign Inf IMMEDIATE ASSIGN IMMEDIATE ASSIGN EXTENDED IMMEDIATE ASSIGN REJECT,立即指配(Immediate Assignment) Page Mode(正常尋呼、擴展尋呼、尋呼重組、不變) Channel Description(信道、絕對頻道號或跳頻參數(shù)) Request Reference Timing Advance Mobile Allocation,CM業(yè)務(wù)請求(CM service request) CM Service type(移動主叫、緊急呼、短消息業(yè)務(wù)等) Ciphering key sequence number Mobile station Classmark 發(fā)射功率等級 支持的加密算法 偽同步能力 短消息能力等 Mobile Identity,鑒權(quán)請求(Authentication request) Ciphering key sequence number Authentication parameter RAND,鑒權(quán)響應(yīng)(Authentication response) Authentication parameter SRES,加密模式命令(Cipher mode command) Encryption Information Cipher Response Mode (可選項，響應(yīng)消息中是否包含IMEI),加密模式完成(Cipher mode complete) Mobile Equipment Identity (可選項) Chosen Encryption Algorithm (可選項),建立(Setup) Bearer capability 信息傳送能力、方式 編碼標(biāo)準(zhǔn)等 Called party BCD number CC capabilities(移動臺是否支持DTMF),指配請求(Assignment Request) Channel Type speech/data indicator channel rate and type speech encoding algorithm or data rate & transparency indicator Priority Circuit Identity Code,指配命令(Assignment Command) Channel Description(信道、絕對頻道號或跳頻參數(shù)) Power command,指配完成(Assignment Complete) RR Cause (可選項) Circuit Identity Code (BSS分配電路時使用) Cell Identifier (小區(qū)改變時使用) Chosen Channel(選擇信道速率/類型時使用) Chosen Encryption Algorithm(改變加密算法時使用) Circuit Pool(存在多個電路池時使用) Speech Version (Chosen) (選擇了語音版本時使用),尋呼(Paging) IMSI TMSI(可選項) Cell Identifier List(規(guī)定尋呼命令發(fā)送范圍),尋呼命令(Paging command) Paging group MS Identity,尋呼請求(Paging request) Page mode Channel needed(信道類型) Mobiles Identity,尋呼(Paging) IMSI TMSI(可選項) Cell Identifier List(規(guī)定尋呼命令發(fā)送范圍),