爱立信AIU OVER IP解决方案及测试结果分享.pdf

爱立信A/Iu over IP解决方案 及测试结果分享 © Ericsson AB 2009 | Ericsson Internal | X (X) | Date 目录 1. A/Iu over IP概述 2. A/Iu over IP给运营商的价值 3. A/Iu over IP功能和路标 4. A/Iu over IP对MSC Pool的影响 5. AoIP测试/试点进展分享 © Ericsson AB 2009 | Ericsson Internal | X (X) | Date › IP是各网络域（接入网、CS 核心网、PS核心网、IMS等） 融合的传输技术 › 易于扩展，满足话务增长需要 › 通过压缩语音和IP复用节省带 宽 › 端到端TrFO和宽带语音编码 提升语音业务体验 PLMN网络的传输IP化 Today MSC-SM-MGw IP transport BSC TDM RNC TDM POI TDM IMS ATM All-IP at all interfaces MSS All IP MSC-SM-MGw IP transport BSC RNC POI IMS IP IP IP A over IP Iu over IP Nb over IP Mb © Ericsson AB 2009 | Ericsson Internal | X (X) | Date GCPGCP BICC SS7/IP SIP SIP-I IP IP IP IP Iu over IP A over IP MSS Service Layer Softswitch PSTN/PLMN IMS 2G Radio Access 3G Radio Access GGSN SGSN Iur/ IP MSC-S MSC-S M-MGwM-MGw 全IP化CS核心网 © Ericsson AB 2009 | Ericsson Internal | X (X) | Date A/Iu CS over IP标准 › 3GPP Release 7定义了A接口信令面IP化的构架和具体要求 › 3GPP Release8 定义了A接口用户面IP化的构架和具体要求 › Iu CS over IP相关规范：3GPP TS 25.414, TS 25.415, TS 29.232 MSC - S MGW BSS/RAN A/Iu over IP Mc/IP MSC - S MGW Mc/IP Nb Nc A/IP e.g. AM R coded IP based protocol stack e.g. AMR coded IP based protocol stack BSS = Transcoder or Transcoder- pair, typically not used in MS-to MS calls = Signalling = User plane TRAU TRAU A/Iu over IP A/Iu over IP A/Iu over IP © Ericsson AB 2009 | Ericsson Internal | X (X) | Date A/Iu接口IP化概览 本地站点 远处站点 AMR/EFR over RTP/UDP/IP GCP MSC-S TC从BSC移至 MGW 通过TrFO提升语 音质量和传输资 源的节省 M-MGw M-MGwBSC/RNC 提供基于IP的电信级GSM业务 提升网络和节点资源使用效率 通过IP接口拓展的A 接口3.本地RNC可通 过IP网落直接连到 远端MGW,节省本地 MGW的资源. IP UDP RTP Payload SCCP M3UA SCTP IP BSSAP A接口： 1.MGw 可以 进行本地交 换,节省Nb接 口资源 SCCP M3UA SCTP IP RANAP Iu接口： © Ericsson AB 2009 | Ericsson Internal | X (X) | Date A接口IP化协议栈 Phys Data Link IPv4 UDP RTP GCP BICC MSC-S MSC-S M-MGw M-MGwBSC Phys Data Link IPv4 SCTP M3UA SCCP BSSAP Phys Data Link IPv4 UDP RTP Nb UP GCP A over IP UP A over IP CP Nb over IP UP A/UP © Ericsson AB 2009 | Ericsson Internal | X (X) | Date Iu接口IP化协议栈 Phys Data Link IPv4 UDP RTP GCP BICC MSC-S MSC-S M-MGw M-MGwBSC Phys Data Link IPv4 SCTP M3UA SCCP RANAP Phys Data Link IPv4 UDP RTP Nb UP GCP Iu over IP UP Iu over IP CP Nb over IP UP IU CS/UP © Ericsson AB 2009 | Ericsson Internal | X (X) | Date A/Iu接口IP化优势： ?提升话音质量提升话音质量 ?在TDM承载时，2G-2G呼叫需要通过4次话音编解码转换，造成话音质量下降 ?接口IP化后，通过实现全程免编解码转换实现话音质量提升 ?提升网络容灾备份水平提升网络容灾备份水平 ?提供更灵活的A接口和Iu接口连接，将大大简化MSC Pool方案的实施，提升容灾效果 ?实现灵活的MGW备份容灾 ?有效提高MGW的利用，进行呼叫建立时的MGW优选 ?降低网络投资建设成本降低网络投资建设成本 ?减少BSC上Transcoder的投资 ?减少运营商在TDM传输上的投资 ?IP站点和传输设备可以和其他设备共享 ?减少60%的A接口传输带宽 ?基于IP传输的RANAP/BSSAP信令可直接通过IP网络送达MSC-S，无需MGW做信令转 换，大大节省了MGW信令处理资源 © Ericsson AB 2009 | Ericsson Internal | X (X) | Date A/Iu接口IP化的优势 ?降低网络运营维护费用和难度降低网络运营维护费用和难度 ?核心网和接入网统一采用IP传输，便于网络管理，减少要维护的设备类型，减少运维人 员投入 ?共享共享IP传输，利用传输，利用IP传输网规划和设计传输网规划和设计 ?在3G RAN以及核心网均采用IP传输的情况下，2G IP RAN将是2/3G共享IP传输，可以 进行统一规划和设计，无需单独建立传输网 ?符合符合IP化发展趋势化发展趋势 ?全网IP化是大趋势， A/Iu接口IP化符合趋势发展 © Ericsson AB 2009 | Ericsson Internal | X (X) | Date A/IU over IP节省IP传输带宽 › PCM: ? 64 kbps › AMR 12.2 with Silence Suppression: ? ~23 kbps › IP Mux provides further bandwidth savings ? AMR 12.2:~11 kbps ? AMR 7.4:~8.2 kbps -80% No compression Compression Ericsson IP MUX 11 64 kbps/AMR speech call 22 50% transmission savings 80% transmission savings Save up to 50% transmission with IP-Mux – still same speech quality © Ericsson AB 2009 | Ericsson Internal | X (X) | Date A/iu over IP实现M-MGw池组网 BSC/RNCBSC/RNC A over TDM / Iu over ATM M-MGw M-MGw M-MGw M-MGw IP backbone12 kE 10 kE 10 kE 10 kE 10 kE 12 kE Dedicated M-MGw nodes per BSC and RNC 1+1 redundancy 2G: A over TDM (3G: Iu over ATM) IP backbone M-MGw 10 kE BSC/RNC 12 kE Distributed load and N+1 redundancy among M- MGw nodes. Any M- MGw can switch the call. Better utilization of M-MGw capacity, less overdimensioning 2G: A over IP (3G: Iu over IP) BSC/RNC 12 kE M-MGw 10 kE M-MGw 10 kE M-MGw pool A over IP / Iu over IP Efficient usage of network resources, load distribution and N+1 network redundancy © Ericsson AB 2009 | Ericsson Internal | X (X) | Date AoIP实现2G TrFO Improved Speech Quality and resource savings in radio, core and transport networks MSC-SMSC-S BICC, OoBTC Nb/RTP/UDP/IP BSCBSC A over IPA over IP GCP GCP BSSAP BSSAP No transcoder No transcoders TrFO with AMR HR, resource savings in radio, core and transport networks M-MGwM-MGw End-to-End TrFO improves speech quality and saves transcoding resources TrFO with AMR, EFR, HR, FR and WB-AMR © Ericsson AB 2009 | Ericsson Internal | X (X) | Date AoIP节省语音编解码资源 M-MGw BSC BSC A over TDM A over TDM PSTN/PLMN M-MGw A: 4 transcoders (BSC-MGw-MGW-BSC) in 30% of calls B: 3 transcoders (BSC-MGw-MGW-PSTN) in 15% of calls C: 1 transcoder in 55% of calls (BSC-MGw-PSTN) A over TDM E.g.AMR voiceTranscoded voice PCM 64 kbps Transcoded AMR voiceE.g. AMR voice Transcoded voice PCM 64 kbps M-MGw BSC AoIP BSC AoIP PSTN/PLMN M-MGw AoIP A: No transcoders in 30% of calls (BSC-MGw-BSC) B: 1 transcoder in 15% of calls (BSC-MGw-PSTN) C: 1 transcoder in 55% of calls (BSC-MGw-PSTN) A over IP E.g. AMR voice AMR voic。