移动软交换和移动分组域承载网技术分析.ppt

移动软交换和移动分组域承载网技术分析,议题,移动通信网络的演进及网络整体架构介绍 3g umts系统及业务对ip承载网络的要求 3g ip承载网需要考虑的关键技术 移动通讯网络向全ip融合的路线图,议题,移动通信网络的演进及网络整体架构介绍 3g umts系统及业务对ip承载网络的要求 3g ip承载网需要考虑的关键技术 移动通讯网络向全ip融合的路线图,circuit/ signaling gateway,feature server(s),mobility manager,2g/2.5g,2g,in services,network feature servers,3g,data + packet voice,value chain,msc circuit switch1,ggsn/pdsn,bsc,voice (legacy features),call agent,internet core,ip core,circuit network,ip ran,移动通信网络的演进及系统结构,ran,core,packet,tdm,rnc/bsc,wireless generations,first generation analog wireless 1g amps - advanced mobile phone service 北美 tacs - total access communications system 英国 中国 nmt - nordic mobile telephone 北欧 second generation 2g and 2.5g digital wireless 2g gsm - global system for mobile communications 欧 900 1800 1900 cdma (ansi-95) - code division multiple access 美 亚太 800 1900 tdma (ansi-136) - time division multiple access 北美 digital wireless 2.5g gsm with gprs general packet radio service cdma1x rtt third generation 3g digital wireless umts - universal mobile telecommunications system (3gpp) wcdma - wideband code division multiple access, radio for umts cdma2000 - code division multiple access (3gpp2),voice,voice +data,ims,mobile wireless evolution,2g,gsm ckt swt data (2.4-9.6 kbps),cdmaone t1a/is-95 ckt swt data (14.4 kbps),tdma t1a/is-136,edge up to 384 kps,2.5 or 2g enhancements,is-136+ up to 64 kbps,64 kbps,144 kbps,cdma2000 1xrtt dv up to 144 kps,cdma2000 1xev hdr do up to 2.4 mbps,384 kbps,1 mbps,cdma2000 1xtreme dv up to 5 mbps,cdma2000 3xrtt up to 5 mbps,is-136 hs outdoor up to 384 kps,wcdma/umts up to 2 mbps (local) up to 384 kbps (wide),is-136 hs indoor,2 mbps,3g,gprs up to 171 kbps,imt-2000是第三代移动通信系统（3g）的统称 第三代移动通信系统最早由国际电信联盟（itu）1985年提 出，考虑到该系统将于2000年左右进入商用市场，工作的频段在2000mhz，且最高业务速率为2000kbps，故于1996年正式更名为imt-2000（international mobile telecommunication-2000） 第三代移动通信系统是一种能提供多种类型、高质量多媒体业务，能实现全球无缝覆盖，具有全球漫游能力，与固定网络相兼容，并以小型便携式终端在任何时候、任何地点进行任何种类通信的通信系统,3g发展概述,第三代移动通信标准化格局,3gpp r99网络参考模型,3gpp r4 网络参考模型,umts release 4,signalling and/or bearer,signalling,* those elements are the same but are duplicated for readability of the figure,msc server,gmsc server,iu-cs1 = bearer (rtp, aal2),iu-cs2 = signalling (ranap),iu-ps,gi,uu,gn,gp,utran,gr,other plmn,sgsn,ggsn,ggsn,apps & services *,hlr *,scp,pdn / internet,mc,mc,mgw,nb,nc,iu-cs1,iu-cs2,pstn / legacy external nw,t-sgw,mgw,grx,gc,apps & services *,scp,hlr *,umts release 5,signalling and/or bearer,signalling,* those elements are the same but are duplicated for readability of the figure,gmsc server,iu-ps,gi,uu,gn,gp,utran,gr,other plmn,sgsn,ggsn,ggsn,apps & services *,hss *,scp,multimedia ip / internet,mc,mc,mgw,nb,nc,iu-cs1,iu-cs2,pstn / legacy external nw,t-sgw,mgw,grx,gc,cscf,mrf,mgcf,mgw,t-sgw,cscf,mw,mm,gi,cx,mg,mc,gi,wcdma协议版本的演进,继承2g（gsm和gprs）所有的业务和功能 核心网分cs电路域和ps分组域 接入网引入wcdma utran 核心网和接入网之间的iu接口基于atm,继承wcdma r99所有的业务和功能 电路域结构的变化：控制和承载相分离，msc可以用合一或server、mgw分离结构实现 电路域引入分组话音，支持多种传输技术：tdm，atm，ip,继承wcdma r4所有的业务和功能 核心网增加im（ip多媒体域） ran向ip方向发展 增强的ip qos能力，支持端到端的ip多媒体业务,2000,2001,2002,规范完成时间,商业运营的3g系统的组成部分,3g 无线接入网络系统及终端: 由 imt-2000 所定义空中接口技术 wcdma, cdm2000, td-scdma. ue, bts/nodeb, bsc/rnc 3g 核心网络系统 电路域和分组域 语音数据多媒体呼叫的处理，现有网络互联，信令交互 分组网关，信令网关，媒体网关，msc/gmsc server, 基于软交换的呼叫控制系统 3g ran 和 cn的分组传送网络 3g ran网络的分组传送网络; 3g 核心网络的ip承载网络 network & service enhancement: mpls, sla/qos, vpn, te, ipv6, security 3g service & control platform and application 3g特色的各种应用和服务，结合现有移动运营商的各种服务网络的应用 统一的服务控制平台： 服务选择、业务控制、移动性实现、资费手段,议题,移动通信网络的演进及网络整体架构介绍 3g umts系统及业务对ip承载网络的要求 3g ip承载网需要考虑的关键技术 移动通讯网络向全ip融合的路线图,3g umts系统及业务对ip承载网络的要求,3g end to end sla/ qos definitions cs domain requirements to ip backbone delay budget for a mobile phone call 3g signaling requirements ps domain requirements to ip backbone traffic model setup bandwidth calculation and capacity planning high availability and security requirements,3g业务对qos的要求,对于实时业务与非实时业务其容量特征的描述方法有明显的不同。需要用不同的模型参数来描述这种容量要求,3g end to end sla/qos definitions,3gpp conversational/real-time data delay requirements,3gpp ts 22.105 v4.3.0,uk pstn call,trans-global call or mobile to landline call,mobile to mobile call,international call with satellite hop,the effects of absolute delay (from itu-t recommendation g.114),what does bt achieve?,grade of service,class of service,customer care/ops,customer care call centre app,cdrs,provisioning,enterprise voip,vm internet access,ntp (enterprise),desktop to internal services,intl clearing houses (roamers),network alarms,sps vss2,3g core: li,call centre voip,desktop internet,enterprise ras,enterprise video streaming,enterprise video telephony,dns, dhcp for the enterprise,desktop email,mis,billing systems,sp billing transfers,retail shop voip,service statistics,service configuration,product alarms,product statistics,product configuration,product cdrs,high,medium,low,conversational,streaming,interactive,background,2.5g ps,dns, dhcp for 2.5g and 3g,ip-based service traffic from ins,2.5g/3g corporate ras,ias,wap,sms-ip,e-topup,sms-c,signalling,video telephony,video streaming,mob. video conferencing,ppg,um streaming,vme,les,corp. ras last mile,3g voice,si ivr,retail shop e-topup,2g voice,in call set-up over ip,messaging products,inter product connectivity,2g data,3g ps,audio streaming,enterprise audio streaming,3g ps domain application and service level mapping table,ip/pdp 和分组域的 qos: 基本的差分服务,ip/pdp 和分组域的qos: qos的高级综合服务,ps domain：ip/pdp qos,3g 流量模型的建立,ip承载网节点、链路选择和设计的依据来自3g业务模型，并需要配合话务模型，进行容量规划。 cs domain 3g cs业务与软交换语音业务类似，以连接用户和用户为主，属于承载型的“扁平业务”。 按照实时业务计算容量带宽要求，分本地通话率和出局通话率计算带宽； ps domain 分组域流量主要是sgsn和ggsn之间gn接口的流量，当用户漫游时，有些业务需要漫游地sgsn与本地ggsn建立隧道承载流量，因此流量呈树状网状结构； 分组域对承载网的带宽需求主要针对gn接口和gi接口，按照非实时业务计算带宽需求。,high availability requirements,wan resilience: the target is to have sub-second fail-over times across the network. backbone should be protected against link and node failures. lan the target is to have sub-second fail-over times across the network. at the sites resilience can be achieved by using duplicated lan interfaces and redundant multilayer lan switches. (full redundancy connect to cisco switch) the behavior of interconnection of mgw/mss integrated switch and access switch l2 resilience: which layer 2 protocol is responsible for achieving sub-second convergence? mstp/rstp the site router should have protected link (port channel) between them. l3 resilience: access switch need to support logical redundancy features, such as hsrp/vrrp; from mgw/mss to access switch default gateway, static route is prefered.,fully redundant pop design (with “non-routing” hosts),provider,provider edge,msc,mgw,mgw,ggsn,customer edg