协议栈介绍- NAS之 SS.pptVIP

协议栈介绍- NAS之 SS  侯景华  NAS协议介绍之SS SS概述 与呼叫相关的SS 与呼叫无关的SS 概述 SS:处于NAS层的CM子层,用于补充或修改基本业务，以提供用户完整的业务. 两个方面:与呼叫相关的补充业务,与呼叫无关的补充业务 概述 CLIP: Calling Line Identification Presentation. CLIR: Calling Line Identification Restriction. COLP: Connected Line Identification Presentation COLR: Connected Line Identification Restriction CFU: Call Forwarding Unconditional CFB: Call Forwarding on Mobile Subscriber Busy CFNRy: Call Forwarding on No Reply CFNRc: Call Forwarding on Mobile Subscriber Not Reachable CW: Call Waiting CH: Call Hold MPTY: Multi Party Service CUG: Closed User Group 概述_SS业务之间的关系 呼叫无关的补充业务:独立于任何呼叫，从发送或接收REGISTER消息开始，在此过程中，可以传输一或多条FACILITY消息，发送RELEASE COMPLETE消息结束此过程. 与CC的流程无关,SS实体支持，主要包括操作：register, eraser, activate, deactivate, interrogate, register password, get password等 除了非结构化补充业务(USSD)，允许多个呼叫独立SS过程同时运行，不允许USSD与其它呼叫独立过程同时运行 允许在有其它呼叫过程时发起USSD操作 一般过程:由NW/MS发起Register消息开始,由Release Complete消息结束,中间可能会有Facility消息 呼叫相关的补充业务:在呼叫过程中发起,包括CB,CF,CL,CW,CH,MPTY,…… 由CC模块处理相关流程 可以通过接收或发送相关的Facility IE调用或结束补充业务，Facility IE包含在FACILITY消息或SETUP、ALERTING、CONNECT等呼叫控制消息中 SS概述_Normal Procedure NAS协议介绍之SS SS概述 与呼叫无关的SS 与呼叫相关的SS 由上层用户或网络发起 建立底层连接(CS/PS) 发送Register消息开始,中间过程可能会有Facility消息,正常结束Release Complete NAS协议介绍之SS SS概述 与呼叫无关的SS 与呼叫相关的SS(CW和CH) 概述 AoCI: Advice of Charge (Information) AoCC: Advice of Charge (Charging) UUS: User-to-User signalling BAOC: Barring of All Outgoing Calls BOIC: Barring of Outgoing International Calls BOIC_exHC: Barring of Outgoing International Calls except those directed to the HPLMN Country BAIC: Barring of All Incomig Calls BIC-Roam: Barring of Incoming Calls when Roaming Outside the HPLMN Country. ECT: Explicit Call Transfer CCBS: Completion of calls to busy subscribers. N Y 38 N Y 12 Y 12 Y 12 Y 12 Y 11 CLOP