2g、3g_ran的ip优化解决方案

111Cisco Confidential.China Mobile Wireless Solution Team

2G/3G RAN 的 IP 优化解决方案 -- Cisco RAN Optimization

康团社 [email protected]

Cisco CMCC HQ and North Team


议题

• 移动 IP NGN 系统架构及向全 IP 融合的路线图移动网络向全 IP 融合的各个步骤：面临的挑战及解决办法

• 2G/3G 对 RAN 的需求和 RAN 优化解决方案RAN Optimization 方案的提出RAN Optimization Value Proposition

• Cisco RAN-O 在移动网络中的应用场景及部署• 参考案例及总结


议题


• 2G/3G 对 UTRAN 的需求和 RAN 优化解决方案RAN Optimization 方案的提出RAN Optimization Value Proposition



INTELLIGENT INFORMATION NETWORKINTELLIGENT INFORMATION NETWORK

Mobility IP NGN ArchitectureA

PP

LIC

AT

ION

C

ON

VE

RG

EN

CE

AP

PL

ICA

TIO

N

CO

NV

ER

GE

NC

E

SE

RV

ICE

C

ON

TR

OL

C

ON

VE

RG

EN

CE

SE

RV

ICE

C

ON

TR

OL

C

ON

VE

RG

EN

CE

TransportTransport

O P

E R

A T

I O

N A

L

L

A Y

E R

S

E C

U R

I T

Y

L

A Y

E R

NE

TW

OR

K

CO

NV

ER

GE

NC

EN

ET

WO

RK

C

ON

VE

RG

EN

CE

Application &Policy Function

Policy Enforcement

Points

Application &Policy Function

Policy Enforcement

Points

MobileService

Exchange

MobileService

Exchange

ParentalControl

VoIPOver

Mobile

Picture Messaging

Mobile TV

Push to Talk

Mobile Gaming

RANAggregation

RANAggregation

RadioRadio IP/MPLSCore

IP/MPLSCore

RANCellsite

RANCellsite


MM

Mobility IP NGN ArchitectureHow does it evolve to full convergence – IP based

Legacy MobileSwitching

HLR

IP/MPLSTransport Network

Internet

RAN

MSC

BSC/RNC

Content

Content/Apps

Policy CSCP

MM

POC App X Content

Enterprise

VPN

BSC/RNC

POCApp X

CLASS

App

IP Core IP based RANEdge

Services SIP/IMSCPE SecuritySplit

ArchitectureAllIPJourney to the IP Mobile Network

PSTN

SS7

V

IP/MPLSTransport Network

Wireless BB


Core Network

RAN Core

RAN T&O

PSTN

n x T1/E1 n x T3/STM1

BSCBTS

MSC

MSC

MSC

GMSC

A-bisTDM

A-terTDM

GGSN

n x T1/E1n x T3/STM1

RNCNode Blu-b

ATM AAL2/5lu-psATM

MediaGateway

Vlu-csATM

3G – UMTS (R4)

SGSN

Gn

PCU

SGSN

GbFrame Relay

GGSN

2.5G GSM/GPRS

Gi

Gn

IPBackbone

CiscoMobile

Exchangen x T1/E1

n x T3/STM1

RNCNode B

lu-rATM

lu-bATM AAL2/5

lu-csIP3G – UMTS (R5)

lu-psIP

MSCPSTNMedia

Gateway

V

IP Evolution in GSM/UMTS Networks


All IP Transport

IP in the CoreIP at the

Cell Site

IP Evolution in Mobile Networks--At a Glance

Market Momentum

Stage 1: IP/MPLS for Mobile Core and Signaling over IP

Stage 2: IP/MPLS at 2G/3G RAN Core (AToM)

Stage 3: Backhaul Optimization at RAN Edge (RAN-O)

Stage 4: End-to-End Intelligent IP Transport

Future Solutions

IP in the CoreIP in the Core



• More Mobile/Data networksEDGE/GPRS/3G

Proliferation of disparate

voice, data, and IT networks

Costly to manage and cumbersome to deploy new services

• More traffic and Services Growing voice traffic

Success of SMS

More data services

Difficult and expensive to scale TDM transport and signaling networks

• Mounting cost pressure due to increasing competition

Trends/Challenges Solution Requirements

• Reduce OpEx

• Simplify network architecture and operation

• Consolidate multiple networks into a highly scalable core

• Migrate 3G and 2G voice from the more expensive circuit-switched network

• Find a scalable and cost efficient solution for the signaling network


PSTN

IP/MPLS Backbone

Voice and SS7oIP


BTS

Radio Access Network Backbone Network

RAN Edge

Node B

A

Gb

IuPS

IuCS

Abis

Iub

RAN Core

IP/MPLS ATM/TDM/FR

SONET/SDH

ATM/TDM

Internet

BSC/RNC

MGW

MSC

GGSNSGSN

T-MGWG-MSW

MSC Server

HLR

Mobile Core Network

Services

G-MSCS


UTRAN 网络的 ATM 连接

PDN/Internet

Iups

Iucs

Node B

RNC

RNC

MSC/VLR PSTN

GGSNTransitSGSN

“Pure IP”

Iur

ATMAAL2 & AAL5

ATMAAL5

ATMAAL2 & AAL5

ATMAAL2 & AAL5

NMS

在 Iu-b 接口： VC 汇聚是必要的功能（大量的 VCs 到少量的接口）；在 Iu 接口： VC 交换是必备的功能；


NodeB

MGW

SGSN

RNC

IuRAAL2 & 5

IuCS - AAL2 & 5

IuPS - AAL5

ATM ATM

IuB – AAL2 & 5

IuB – AAL2 & 5

RAN Edge RAN Core



• Iu interfaces were ATM based

• Continuous 3G ATM buildout

• Lack of scalability and industry momentum in ATM operators re-evaluate network investment strategy

• PVC management issues


• Scale back and cap ATM investment

• Protect existing ATM investment

• Enable convergence and OpEx reduction

• Balancing proved AToM technology

AToM: Any Transport over MPLS


Stage 2: IP/MPLS at RAN Core (AToM)

SONET/SDH

BTS

Node B

BSC

ATM Agregation

PSTN


Abis

Iub

ATM/FR/TDM

IP/MPLS

SGSN

IP/MPLS Backbone

TMGWGMSC

MSC Server

GGSN Internet

AToM

MSCSS7oIP

MGW

RNC

ATM/TDM

RAN Edge RAN Core Mobile Core Network

HLR


Stage 3: RAN Backhaul Optimization

• Proliferation of networks, services and high-speed access increases backhaul traffic: Co-existed BTS/Node B sites for

GSM/GPRS/EDGE/UMTSHSDPA and WiFiHigh-speed IP radio overlaysIMS/SEF and FMC

• Increasing traffic loads call for additional costly backhaul BW

Need to reduce E1/T1 backhaul cost while increasing backhaul capacity and availabilityNeed to reduce Capex and OpEx associated with 2G MSCs

• Need to expand existing services and introduce new services with same or lower per unit cost


• Transition to Next Gen backhaul

Access-agnostic Maximize existing backhaulAllow for transition to broadband backhaulEnable 2G/3G/4G convergence

• More Effective for Operation•IP intelligent Cell site

• Extra ServicesSupport voice, data, video


Stage 3: Backhaul Optimization – RAN-O

SONET/SDH

BTS/Node B

RAN Access Network Backbone Network

Abis/Iub Optimization

RAN Edge

FR/ATM/TDM

IP/MPLS

Abis/Iub

IP

SONET/SDH/Ethernet/DSL

IP POP at cellsite

Broadband IP Backhaul

GGSN

IP/MPLS Backbone

Internet

BSC/RNC GMSC

PSTN

SGSN

SS7oIP

MGW

MSC Server

MSCRAN Core

RAN-OMobile Core Network



• IP RAN deploymentRAN elements talking IP

Co-existence with legacy RAN

• Multicast in IP RAN

• IP-based mobile services

• Hierarchical Mobile IP for mobility

• New radio technologies and convergence of access networks

• Voice/data/video any time any where over any access

Trends/Challenges

• A high-capacity, scalable and cost efficient network for IP RAN, with support for legacy RAN

• End-to-end network with simplified architecture and management

• Enable Quad-play: Voice, Data, Video, Mobility

Solution Requirements



Internet

BTS/Node B

BSC/RNC

GMGW


MGW

Abis/Iub

IP/MPLS

SONET/SDH/Ethernet/DWDM

IP POP at cellsite

MSC Server

3GPP IP RAN

Broadband Networks

Mobility GW

PSTNIP over E1/T1


Cisco Intelligent IP Transport Solutions Spanning the RAN and the Core

Mobility Cisco Intelligent IP Transport

Optimization over IP

GSM/UMTS Optimization

CDMA Optimization


HSDPA Offload

IP POP Services

New revenue-generating IP services

RANAggregation

EV-DO IP Aggregation

UMTS ATM Aggregation

WiMax IP Aggregation

IP/MPLSBackbone

IP/MPLS Core

Any Transport over MPLS (AToM) in the RAN

2G/3G Voice Convergence

Signalingover IP

SS7oIP

SMS Offload

Convergence with IP/MPLS core

RAN Cell Site

Cisco in the RAN Cisco in the Core

RAN Optimization


议题





Mobile Operator CAPEX

Mobile Operator CAPEX

73.00% 72.10% 70.00% 69.40%

3.40% 4.10% 4.40% 4.50%

8.60% 8.80% 10.60% 11.10%

15.00% 15.00% 15.00% 15.00%

0%10%20%

30%40%50%60%70%

80%90%

100%

2001 2002 2003 2004

Services

Data Edge & Core

Voice Switching

Radio Infrastructure

Mobile CAPEX Trend

Limited CapEx demands the maximization of returns on capital investments, making investment protection critical, particularly in the RAN since it accounts for 70% of CapEx

Source: CiscoToscana

Source: Gartner Research as revised by Cisco BD


3G Deployment Costs

Incumbent Operators

50%

25%

25%

UTRAN and Access Transmission

Core Network and Service Platforms

Radio and Site

Greenfield Operators

40%

20%

40%

UTRAN and Access Transmission

Core Network and Service Platforms

Radio and SiteTelecom Media Networks

A significant cost of rolling out a new service is the access transmission network—improving current

backhaul network utilization provides relief


3GPP RAN Evolution – Rel5RAN Edge / RAN Core

NodeB

MGW

SGSN

RAN Edge RAN Core

RNC

IurAAL2&5

Iu-cs

Iu-ps

BTS

MSC

Gb – IP or FR

A(ter) -TDM

Abis - TDMBSC

w/PCU

ATM or IP

ATM or IP

Iub

Iub


3GPP RAN Evolution – Rel6+

• Backward compatibility with previous architecture and protocols

• Split control and user plane

• More features should be handled by the (i)NodeB(+)

• Evolution to IP

Cost-efficiency, scalability and robustness

Better QoS because multimedia

Faster hand-over, less delay

More traffic means more processing

RNC can’t handle everything


Cisco Concept:-- Facing Full IP Architecture

Cell Site DCNReduce truck rolls and MTTR•Remote Cell Site Access•Cell Site LAN Extension•Cell Site IP Telephony•Cell Site Surveillance•Remote Alarm Monitoring and Control•Port Flexibility

Cell Site Hotspot Co-LocationRAN backhaul re-use•2G BTS, 3G NodeB•QoS and Dynamic Bandwidth Allocation•Security•Intelligent Network Services (VoIP, VPN, local DHCP proxy, Mobile IP, routing, security, etc.)•Reduce TTM for new services

Optimized Abis/Iub over IPFull IP and Reduce backhaul costs•Maximize the number of voice and data calls carried per T1/E1•IP-based packet backhaul for 2/3/4G•New services “ride for free”•Reduce TTM for new services

Alternative BackhaulEnable cheaper and higher capacity backhaul options•802.16, Metro E, DSL backhaul•IP-based transport for 2/3/4G voice/data bearer


ONS

E1+FE

2xE1

4xE1 IP( E1, FE or STM-1)

E1+FE

2xE1

4xE1

Cell Site Central Site

4xE1(ATM)

WCDMA Node BRNC

NxE1(ATM) + FE

HSDPA Node B RNC

2xE1(TDM)

GSM BTS BSC

MWR-1941-DC-ACisco 3845 ONS 15454

Cisco 基于 IP 的 RAN 优化方案- 针对“ 2G/3G 的传输网络层”

SDH/MSTP


RAN-O 在运营商传输网中的位置- 针对“ 2G/3G 的传输网络层”

N×E1

Cell Site

E1+FE

Cell Site

2xE1

4xE1

Central Site

RNC

RNC

BSC

ONS

E1+FE

E1+WiMAX

Cell Site

E1+FE


Optimized Abis and Iub over IP

RNC

BSCGSM BTS

UMTS Node B

TDM

Iub

TDM

ATM

Abis

ATM

E1

Optimized Abis/Iub over IP

T1/E1

T1/E1

Cell Site Access Network BSC/RNC Site

Cisco MWR 1941-DC


RAN-O Case Study: Ericsson Busy Hour GSM Efficiency Gain Results

Ericsson Production Abis E1 Efficiency Gain

0

10

20

30

40

50

60

70

80

90

100

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

Time (seconds)

E1

Uti

lizat

ion

Abis E1 TDM Util

Avg Util after Opt

Inst Util after Opt

Inst Util before Opt

Avg Util before Opt

Recovered 100%of bandwidth from

idle channels

Recovered 50%+of bandwidth from

active channels

80%+ totalbandwidthrecovered

Reduce2 TDM Abis E1s

To 1 IP E1!


RAN-O Case Study: Siemens Busy Hour GSM Eff Gain Results

Siemens Production Abis E1 Efficiency Gain

0

10

20

30

40

50

60

70

80

90

100

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

Time (seconds)

E1 U

tiliza

tio

n Abis E1 TDM Util

Avg Util after Opt

Instant Util before Opt

Instant Util before Opt

Avg Util before Opt



To 1 IP E1!


RAN-O Case Study: Nokia Busy Hour GSM Eff Gain Results

Nokia Production Abis E1 Efficiency Gain

0

10

20

30

40

50

60

70

80

90

100

Time (seconds)

E1

Uti

liza

tio

n

Abis E1 TDM Util

Avg Util after Opt

Inst Util after Opt

Inst Util before Opt

Avg Util before Opt



To 1 IP E1!


IP Phones

Cell Site Points-of-Presence (POPs)

RNC

BSCGSM BTS

UMTS Node B

TDM TDM

ATMATM

T1/E1

Optimized Abis/Iub over IPPWLAN

Mobile IP/FAVoIPContent CachingMulti VPNIP MulticastingQoSPPPDHCPRouting

100Base-T

RS-232/10/100Base-T

Cell Site Access Network BSC/RNC Site Mobile Internet Edge

BatteriesTower LightsRF Monitoring UnitLocation Based ServerLaptopsIP Cameras

100Base-T

SCCP IP Phones


IP Phones

Alternative Cellular Backhaul- Based on IP

RNC

BSCGSM BTS

UMTS Node B

TDM TDM

ATMATM

PWLAN100Base-T

Cell Site Access Network BSC/RNC Site Mobile Internet Edge

100Base-T

802.16

Telco DATA Network

Alternative Backhaul Options:Metro Ethernet802.16/20xDSL, Cable

Alternative Backhaul Options:Metro Ethernet802.16/20xDSL, Cable

Cisco MWR

SCCP IP Phones


Cell Site DCN + Optimized Abis/Iub over IP + Cell Site Hotspot/WMAN Co-Location

E1

Cisco MWR 1941-DC

RF Monitoring UnitMicrowave EquipmentTower Light ControllerBattery System

10/100 Base-T

RS-232

Email access for trouble ticketsOSS network accessDatabase access for inventory and technical knowledgeCisco IP SoftPhone or FXS/FXO VoIP for tech and support servicesWeb camera for SecurityLocal data archival

IP (Eth)

All IP-basedbearer transport

+ DCN traffic+ Data overlay

Network Operations Center

BSC/RNC

BTS/Node B

10/100 Base-T

T1/E1

•Optimize RAN Backhaul Optimize RAN Backhaul EfficiencyEfficiency

•Maximize Utilization of RAN Maximize Utilization of RAN Transport NetworkTransport Network

•Optimize Cell Site Optimize Cell Site Operations SupportOperations Support

•Reduce Management CostsReduce Management Costs

Voice and data bearer carried over IP using

minimum bandwidth

TDM HDLCATM

(T1/E1)

WMAN (802.16, 802/20),3/4G data overlays,PWLANs (802.11)

ONS, MWR 3845, 1941-DC

IP Phones

IP Phones


• 面向未来移动通信全 IP 架构 : 移动通信业务全面基于 IP,RAN 传送（基站业务流）回传基于 IP

统一 3G 发展各个阶段中各类移动设备上的各种传输接口 : TDM --> IP 传送的平滑过渡；

• 优化 Abis/Iub Backhaul over IP: 优化基站业务流量的回传效率在不降低话质的前提下，扩大现有 E1 线路的传送话路的数量 ;

2G/3G 共站点 : 汇集 2G/3G 基站的业务流到同一个 IP 的回传链路上 : N*E1;

RAN 节点归属 RNC 的迁移、优化的简便性：未来的 Node-B 的双归属， RNC 的冗余

• 2G/3G 基站点智能化，实现基站点业务综合化优化基站维护网络 : 减少维护成本 , 可支持基站间设备状态互知，如安全监控、环境探测 ;

基站点不仅仅是移动通信网络的接入点，并可扩充为各种 IP 业务的接入点 , 具备完善的 Qos 调度功能；运营商可充分利用基站点实现对企业用户的业务接入：提供有线 / 无线专线；

• 满足未来新类型基站 IP 化建设的需要 : PWLAN, WiMAX, 802.20.. 丰富的 IP 端口、以最小的成本、最高的容量传输满足新类型基站的要求

Cisco RAN-O Value Proposition


Cisco RAN-O 产品系列

MWR 1941-DC-ACell Site Access Platform

ONS 15454Aggregation Platform

•GSM & UMTS Transport Optimization•GPRS/EDGE support•All GSM codecs•Satellite transport support•UMTS and HSDPA Offload•IP Broadband RAN Transport with ext clock•QoS, basic IP Services•IP transport for 2G/3G/4G•T1/E1 Protection Switching•Extended Operating Temp•Vendor independent•Advanced Services/CA Package

MWTMNetwork Management

•GSM & UMTS Transport Optimization•GPRS/EDGE support•All GSM codecs•UMTS and HSDPA Offload•IP Broadband RAN Transport with ext clock•QoS, basic IP Services•IP transport for 2G/3G/4G•N:1 redundancy•Extended Operating Temp•Vendor independent•Advanced Services/CA Package

•Centralized management console•Real-time backhaul utilization by traffic type and radio •Event monitoring•Web based reporting•Auto discovery and topology•Inventory •OSS integration•Capacity planning•Client-server architecture•Multiple OS support – Solaris, Windows, Linux


NetworkModule Slot

WIC Slots

CompactFlash2 FE

Ports

Console /AUX Port

Cisco MWR 1941-DC-A

• 1RU/12.5 in. deep/19 in. rack mount form factor w/Front-to-back airflow

• Front access cabling and LEDs

• 2 integrated 10/100Base-T LAN ports

• 3 integrated VWIC slots each supporting 2 T1/E1

• 1 Network Module slot supporting 2 VWICs

• Integrated AIM

• -10 to 55°C extended operating temperature

• 20-60V DC universal power supply

• T1/E1 Protection Switching


ONS UMTS Configuration

FMEC ETSI Panel – BITS And Cables Here

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Tim

ing

& C

om

m C

on

trol

Tim

ing

& C

om

m C

on

trol

Alarm

Interface C

on

troller

Cro

ss Co

nn

ect

ST

M1

-12:

A

ctiv

eS

TM

1-1

2 :

Act

ive

ST

M1

-12

: A

ctiv

eS

TM

1-1

2 :

Sta

nd

by

RA

N

Se

rvic

e M

od

ule

: A

ctiv

e

Fan Tray System Status

Fiber Management

E1-

42:

A

ctiv

eE

1-4

2:

Act

ive

E1-

42:

A

ctiv

e

E1-

42:

S

tan

db

y

RA

N

Se

rvic

e M

od

ule

: A

ctiv

e

RA

N

Se

rvic

e M

od

ule

: A

ctiv

eR

AN

Ser

vic

e M

od

ule

S

tan

db

y

Cro

ss Co

nn

ect

E3, STM1, or OC3for high speedUMTS or IP


Cisco Platform Summary

Total Physical E1s

Example Ratio

Abis-E1 : IP-E1

GSM

Interfaces

UMTS

Interfaces

MWR 10 4:2 T1 / E1 T1 / E1

3845 24 8:6 (Max 8 Abis E1s)

T1 / E1 T1 / E1

ONS 15454

ETSI

252 150:100 E1 / cSTM1 E1 / cSTM1 / STM1

ONS 15454 ANSI 224 134:90 T1 / cOC3 T1 / cOC3, OC3


议题





思科无线传输优化方案应用场景

• 动态调度 2G/2.5G/3G 共站的传输资源基于 TDM 链路 / 时隙基于 IP over E1 的统计复用适配移动通信发展过程中的不同基站接口和传输网络对 Abis/Iub 接口数据的压缩和优化，降低租线 ( 卫星 / 微波）开支

• 适应高速无线数据业务对传输的要求将高速数据业务流量分流到 STM-1 、 Metro-E 、 WiMAX 等高速 IP 网络中对线路质量敏感的话音业务仍采用现有专用 E1 线路承载

• 利用基站点拓展新业务基站点不仅仅是移动通信网络的接入点，并可扩充为各种 IP 业务的接入点；运营商可充分利用基站点实现对企业用户的业务接入：提供有线 / 无线专线；


Cisco RAN-O Solution基于 IP 的 GSM/UMTS 无线传输网优化方案 – 应用场景 1

RNC

BSC

Node-B

BTSMobile

Operator NetworkPLMN

Cell-Site

Optimized GSM and UMTS RAN Backhaul: Abis + Iub over IP

获益于：•减少 RAN 回传网络的资源要求，更快、更便宜地扩容 GSM/GPRS/UMTS 网络，而无需更改 RAN 网络的设计；•与 3GPP R5/R6 IP RAN 传输协议兼容，支持 FR, EFR, HR, AMR 等语音速率，不影响语音质量 ;

•单一的 IP 汇聚网络，无需增加费用，快速地在现有 RAN 上开展 UMTS 业务，简化 UMTS/GSM 网络的运维费用和升级成本•与无线厂商设备无关，可以将多厂商设备集成到同一个 RAN 中，运营商级别的可靠性；•基站 IP 电话和局域网为技术人员提供语音和网络连接；•通过 IP/SNMP 维护、管理和监视基站设备 , 节省运维成本，提高效率，缩短平均故障恢复时间（ MTTR ）；

SDH E1

Transparentto RANVendors

基于现有基站回传链路实现优化


RNC

BSC

Node-B

BTSMobile


Cell-Site


获益于：• 可以为基于 IP 的 RAN 选择多种高容量、低费用的传输技术，不仅仅是 E1 ，还包括以太网、 802.xx ；• 将 UMTS 和 HSDPA 数据从 E1 上分流到基于 IP 的网络中，节省运维费用；• 当网络需求增长时，可以更简单、更快、更便宜地扩容；• 从专线向宽带回传网络迁移时，设备提供投资保护；• Cisco 业务保障代理（ SAA ）有效地、及时地监视网络的性能（延迟、抖动、丢包、服务级别等）；


T1/E1GSM/GPRS/EDGE path

UMTS Voice and Signaling path

HSDPA and UMTS Data Offload

Cisco RAN-O Solution基于 IP 的 GSM/UMTS 无线传输网优化方案 –应用场景 2


Cisco RAN-O Solution基于 IP 的 GSM/UMTS 无线传输网优化方案 –应用场景 3

RNC

BSC

BTS/Node B Mobile



获益于 :

• 基站上的 IP 连接带来新的用户，基站成为多种业务和企业客户的接入点，创造新的利润增长；• 基站点路由器可用于连接其他无线设备，可快速部署下一代无线网络技术，无缝地升级到 4G ；


E1

Mobile IP/FA, VoIP, Content Caching, Multi VPN, IP Multicasting, QoS, PPP, DHCP, Routing综合业务基站点

IP Phones

IP Phones

QoS, Security


思科无线传输优化方案阶段部署3G 启动阶段

• 2G 用户占绝大多数； 3G 用户很少；却不断增长• 回传资源以 E1 为主，主要满足 Abis 流量需求，兼顾 Iub 流量• 思科无线传输优化方案用途：

利用 IP E1 的统计复用方式降低 TDM 链路 / 时隙的调度和运维难度

UMTS Iub E1

IP E1

GSM Abis E1


思科无线传输优化方案阶段部署3G 拓展阶段

• 新增用户以 3G 为主， 2G 用户不断升级到 3G ， 3G 用户数激增• 新兴高速传输技术（如 WiMAX ）可以为运营商带来更多用户• 回传资源须同时满足 Abis 、 Iub 和 IP 流量需求• 思科无线传输优化方案用途：

利用 IP E1 的统计复用方式自动适应 Abis 流量和 Iub 流量的此消彼涨利用各种高速 IP 网络分流移动用户数据业务流量

IP E1

GSM Abis E1

SDH/FE/xDSL/WiMAXUMTS Iub E1

UMTS Iub E1

WiMAX/WiFi


思科无线传输优化方案阶段部署3G R5/B3G 阶段

• 2G 用户量不断萎缩， 2G 网络逐步停用• 3G/B3G/4G 基站基本具备 IP 接口（以 Fast Ethernet 为主）• 回传资源升级为 Metro E/AToM/MSTP 等，但仍需支持 Abis 和 Iub E1

• 思科无线传输优化方案用途：提供对 3G/B3G/4G 多种设备的 IP 接口在新的回传网络上提供对原有 E1 接口的支持，摆脱对 E1 传输的依赖

GSM Abis E1

IP E1UMTS Iub E1

UMTS Iub E1

UMTS Iub/4GIP Fast Ethernet

SDH/FE/xDSL/WiMAX


议题





• Telefonica Moviles Espana

• Optimus Portugal

• H3G Italy

• Vodafone Portugal

• Wind Italy

RAN Optimization Customers example


案例参考

• Telefonica Moviles Espana—GSM/UMTS Hybrid RAN, Full IP migration

• Optimus Portugal— Full IP migration, Low Capacity Requirement on E1

• H3G Italy— Leased Line Saving, Full IP migration

• Vodafone Portugal—Microwave E1 Saving in island

• Wind Italy—Microwave E1 Saving


SCCP IP PhonesSCCP IP Phones

Cisco 基于 IP 的 RAN 优化方案 –总结

RNC

BSCGSM/GPRS/EDGE BTS

UMTS Node BHSDPA/HSUPA

TDM TDM

ATM

Ethernet EthernetSDH/WiMax

GSM BTSUMTS

Node B

E1

GSM/UMTS Transport Optimization over IP

IP Broadband RAN Transport

Cell Site IP POPs

ATM

MWR

MWR

ONS

促使 2G/3G 基站公用回传链路，并采用优化手段，提高回传效率，降低成本；

灵活、有效地支持多代无线技术的共存，敏捷地适应网络的特点和商业需求的发展 ;基站不仅仅是移动接入设备，将被扩充为各种 IP 业务的接入点，如安全监控、环境探测……


总结

• 基站 IP 化、传输 IP 化是大势所趋无线设备厂商：降低基站开发成本、缩短开发周期移动运营商：加速新功能、新技术应用；提高传输资源利用率

• 多代、多厂家移动基站设备共存从中国 2G 网络商用到模拟网络（ 660万用户）停用，历时 7年从 3G 商用到 2G （超过 4亿用户）停用，将历时？年

• 思科无线传输优化方案的作用统一 3G 发展各个阶段中各类移动设备上的各种传输接口加速移动运营商部署新技术、新网络调和基站 IP 化和传输 IP 化之间的时间差降低运营成本，面向未来发展，提供新的业务增长点

2g、3g_ran的ip优化解决方案

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