cisco 3G承载网交流幻灯.pdf

3G承载网技术交流
© 2005 Cisco Systems, Inc. All rights reserved. 1
下一代骨干网络近期趋势和策略研究的重点
•趋势
在保证业务质量的和技术可行性的前提下,网络尽量
少,尽早融合
•重点问题
接入、网络和业务之间如何关联?
现有网络融合的路线图?
© 2005 Cisco Systems, Inc. All rights reserved. 2
骨干承载网络建设路线选择和对比
•专用网元封闭网vs 用户网方式
–专用网元封闭网:NGN 、3G CS/PS/IMS等网元承载
–用户网: +IPTV+L2/L3 VPN+( 固网 IMS ?)
•公众网& 专用网分网方式
–专用网:NGN、3G CS、3G PS 内部接口、L3/L2 VPN
–公众网:、IPTV、3G PS 外部接口,未来IMS
•公众互联网& 商用网分网方式
–商用网:大客户DIA、L2/L3 VPN、IPTV、NGN 、3G 、IMS
–公众互联网:普通 业务
© 2005 Cisco Systems, Inc. All rights reserved. 3
3G承载网总体需要考虑的问题
• 3G承载网广域网和本地网的界定
•满足R4和R5的演进方向对承载网的要求
• 3G系统网元间本地网和广域网的快速收敛、时延、抖动
、可靠性等要求
–核心网络的控制协议及业务应用特点:SLA 要求
• 3G承载网广域网的关键技术:L3 MPLS VPN等
• 3G承载网本地网的关键技术:MSTP/RSTP/HSRPv2等
© 2005 Cisco Systems, Inc. All rights reserved. 4
3G网络系统架构
SECURITY
RAN RAN
Core 现有网络
Access MSC Server GMSC Server ITP
RNC MGW
ATM/IP Transport SS7
Node B V
MGW
Cell Site Router Aggregation
PSTN
UMTS V
SGSN GGSN
IP Transport BSC
BTS Private
VPN
Cell Site Router …
CDMA2000 Aggregation
PCF PDSN
MPLS/VPN/QoS/IPv6/ PIv4/v6
Security/… Enabled
AP/Bridge
Aggregation
FA HA
PWLAN / WiMax Mobile Wireless Center
MMN..
VOICE DATA SIGNAL
Offered by Cisco
© 2005 Cisco Systems, Inc. All rights reserved. 5
migrate works to single MPLS core
Gn
Site 2 Site 4
Gi IP/MPLS Core
Site 6
Billing Site 1
Site 3 Site 5
Voice Site 4
Site 2
Site 5
Site 1
Site 5
Site 3
works mon work over high capacity
sites with different edge transmission carrying all services
devices and transmission
© 2005 Cisco Systems, Inc. All rights reserved. 6
plexity and Overlap
2G/3G R99 2G/3G R4/5
GGSN
GRX
PDSN
MGW RNC SGSN FR IP
BTS SS7 MSC ATM BTS SS7 MSC MGW RNC SGSN PDSN GGSN GRX
/SDH IP/MPLS
Dark Fibre DWDM/Dark Fibre
© 2005 Cisco Systems, Inc. All rights reserved. 7
2G and R99 voice
RAN Edge RAN Core
PSTN
BTS BSC GMSC
MGW MSC
NodeB RNC
BTS BSC
MGW MSC
NodeB RNC
ATM
SDH
© 2005