GSM协议栈设计结构.doc

GSM 协议栈设计结构 Architecture of GSM CC Summary In GSM protocol, both SS protocol and CC protocol are sub-protocol of CM protocol. The CC entity uses box to communicate with API, MM and RR. Each CC entity shall communicate with the correspondent peer entity using its own MM connection. Object Model Diagram In CC module, different CC context needs interwork with others, so all CC context are organized in a queue. Every CC context will manage a call. Objects Description The functions of CC entity as following: Call establishment procedures; Call clearing procedures; Call information phase procedures; Miscellaneous procedures. DTMF manage; User notification; In call Modify manage; CRSS function manage. CC State Chart FSM state CC state Describe U0 CC_U0 No call exists U01 CC_U01 MM Connection pending, This state exists for a mobile originating call, when the mobile station requests the establishment of a MM connection. U1 CC_U1 CC has send SETUP CC_U3 CC has received CALL PROCEEDING CC_U4 CC has received ALERT U6 CC_U6 MS has received SETUP U8 CC_U8 MS has sent CONNECT. U9 CC_U9 MS has sent CALL CONFIRM U9 CC_U7 MS has sent ALERTING U10 CC_U26 MO modifying. CC_U27 MT modifying. CC_U10 The call active, refer U26, U27, REESET. REESET MM connection is disconnected and just reestablishing, the CC U10. U11 CC_U11 This state exists when the mobile station has requested the network to clear the end-to-end connection (if any) and is waiting for a response. U12 CC_U12 This state exists when the mobile station has received an invitation to disconnect because the network has disconnected the end-to-end connection (if any). U19 CC_U19 This state exists when the MS has requested the network to release and is waiting for a response. GENE Different CC state will do same respond to message will deal in virtual FSM state GENE. . Call states at the mobile station side of the interface The states which may exist on the mobile station side of the radio in