GSM 协 议 栈 设 计 结 构1 Architecture of GSM2 CC2.1 SummaryIn 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.2.2 Object Model DiagramIn 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.2.3 Objects DescriptionThe 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.2.4 CC State ChartCC_U1CC_U8CC_U9CC_U12CC_U6CC_U19CC_GENECC_U01CC_U0CC_U10CC_REESETCC_U11U19U11CCU11U19MM_RELEASE_IND[CC_10]除外MM_RELEASE_INDCC_CONNECT_ACKCC_T303_EXPCC_REL_REQCC_RELCMPLT_REQMM_REESTAB_CNFMM_ESTAB_ERR[CC_DISC_REQ][FIRST]CC_T310_EXPCC_SETUP_REQCC_T303_EXPMM_REESTAB_ERRCC_T308_EXP[API_NO_DISC_REQ]CC_DISC_REQ[except CC_REEST]CC_T305_EXPCC_T313_EXPCC_RELCMPLT_REQCC_CONNECT_REQRELEASEMM_ESTAB_CNFCC_T323_EXP[MO Modify]SETUPRELEASERELEASE[except CC_U19,CC_U0]CONNECTCC_RELEASE_CMPLCC_CALL_CONF_REQDISCONNECT[U0,U12,U19]除DISCONNECTFSM stateCC stateDescribeU0CC_U0No call existsU01CC_U01MM Connection pending, This state exists for a mobile originating call, when the mobile station requests the establishment of a MM connection.U1CC_U1CC has send SETUP CC_U3CC has received CALL PROCEEDINGCC_U4CC has received ALERTU6CC_U6MS has received SETUPU8CC_U8MS has sent CONNECT.U9CC_U9MShas sent CALL CONFIRMU9CC_U7MS has sent ALERTINGU10CC_U26MO modifying.CC_U27MT modifying.CC_U10The call active, refer U26, U27, REESET.REESETMM connection is disconnected and just reestablishing, the CC U10.U11CC_...
