【正文】 IMS 核心網 總體技術方案 版本號： 1 . CNGI 通用業(yè)務平臺項目組 ╳╳╳╳ ╳╳ ╳╳ IMS 核心網總體技術方案 CNGI 通用業(yè)務平臺項目組 第 2 頁 共 108 頁 目 錄 1 范圍 .......................................................................................................................... 6 2 引用標準 ................................................................................................................... 6 3 相關術語與縮略語解釋 .............................................................................................. 7 4 UseCase 描述 ............................................................................................................ 9 UCIMS001：終端接入 IMS 網絡 ............................................................... 9 UCIMS002： IMS 網絡 觸發(fā)業(yè)務到 AS ..................................................... 10 UCIMS003： IMS 網絡和其他網絡互通 .................................................... 12 5 系統高層需求 .......................................................................................................... 13 6 系統低層需求 .......................................................................................................... 14 7 方案綜述 ................................................................................................................. 16 IMS 多種接入解決方案 .............................................................................. 16 IMS 業(yè)務開放解決方案 .............................................................................. 20 IMS 網絡互通解決方案 .............................................................................. 23 IMS QoS 解決方案 .................................................................................... 27 IMS 安全解決方案 ..................................................................................... 31 8 IMS 邏輯組網圖 ...................................................................................................... 37 IMS 組網圖 ............................................................................................... 37 IMS 組網說明 ............................................................................................ 37 9 IMS 主要的業(yè)務流程 ............................................................................................... 38 IMS AKA 鑒權流程 ................................................................................... 38 Early IMS 鑒權流程 ................................................................................... 41 HTTP Degest 鑒權流程 ............................................................................... 44 IMS 用戶基本會話 MO 流程 ...................................................................... 46 IMS 用戶基本會話 SS 流程 ....................................................................... 50 IMS 用戶基本會話 MT 流程 ....................................................................... 53 IMS 用戶發(fā)起釋放流程 .............................................................................. 56 UE 訂閱注冊狀態(tài)流程 ............................................................................... 58 IMS 核心網總體技術方案 CNGI 通用業(yè)務平臺項目組 第 3 頁 共 108 頁 IMS 業(yè)務觸發(fā)流程 ..................................................................................... 59 IMS 和 3G R4 網絡互通流程 ...................................................................... 60 PSTN 和 IMS 互通流程 .............................................................................. 64 10 網元 ................................................................................................................. 66 CSCF 功能需求 ......................................................................................... 66 MRFC 功能需求 ........................................................................................ 70 MRFP 功能需求 ........................................................................................ 71 BGCF 功能需求 ......................................................................................... 71 HSS 功能需求 ........................................................................................... 71 SLF 功能需求 ............................................................................................ 73 MGCF 功能需求 ........................................................................................ 73 IMMGW 功能需求 ................................................................................... 74 PDF 功能需求 ........................................................................................... 74 11 參考點 ............................................................................................................. 74 IMS 網絡內外部接口概貌 .......................................................................... 74 Cx 接口： ................................................................................................. 75 Gm 接口： ................................................................................................ 75 Mn 接口： ................................................................................................ 75 Mg 接口： ................................................................................................ 76 Mr 接口： ................................................................................................. 76 Mp 接口： ................................................................................................ 76 Mw 接口： ................................................................................................ 76 Go 接口： ................................................................................................. 76 Gq 接口： ................................................................................................. 77 Mi 接口： ................................................................................................. 77 Mj 接口： .............................................................................................