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,内部切换流程,MS,MSC,BSS1,BSS2,外部切换流程,信道请求(Channel Request) ESTABLISHMENT CAUSE(36bit) RANDOM REFERENCE(52bit),信道要求(Channel Required) Request Referenc(包括random reference 和部分帧号) Access Delay(BTS测量得到的时延),信道激活(Channel Activation) Channel number Activation type(3bit,立即指配、指配、切换等) Channel Mode(表示话音、数据或信令，以及相应属性) Channel Identification(绝对频道号或跳频参数) Handover Reference(条件：切换) Timing Advance(条件：小区内信道改变),信道激活证实(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(正常寻呼、扩展寻呼、寻呼重组、不变) Channel Description(信道、绝对频道号或跳频参数) Request Reference Timing Advance Mobile Allocation,CM业务请求(CM service request) CM Service type(移动主叫、紧急呼、短消息业务等) Ciphering key sequence number Mobile station Classmark 发射功率等级 支持的加密算法 伪同步能力 短消息能力等 Mobile Identity,鉴权请求(Authentication request) Ciphering key sequence number Authentication parameter RAND,鉴权响应(Authentication response) Authentication parameter SRES,加密模式命令(Cipher mode command) Encryption Information Cipher Response Mode (可选项，响应消息中是否包含IMEI),加密模式完成(Cipher mode complete) Mobile Equipment Identity (可选项) Chosen Encryption Algorithm (可选项),建立(Setup) Bearer capability 信息传送能力、方式 编码标准等 Called party BCD number CC capabilities(移动台是否支持DTMF),指配请求(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、绝对频道号或跳频参数) Power command,指配完成(Assignment Complete) RR Cause (可选项) Circuit Identity Code (BSS分配电路时使用) Cell Identifier (小区改变时使用) Chosen Channel(选择信道速率/类型时使用) Chosen Encryption Algorithm(改变加密算法时使用) Circuit Pool(存在多个电路池时使用) Speech Version (Chosen) (选择了语音版本时使用),寻呼(Paging) IMSI TMSI(可选项) Cell Identifier List(规定寻呼命令发送范围),寻呼命令(Paging command) Paging group MS Identity,寻呼请求(Paging request) Page mode Channel needed(信道类型) Mobiles Identity,寻呼(Paging) IMSI TMSI(可选项) Cell Identifier List(规定寻呼命令发送范围),