Central Controlled IPRANdraft-khy-rtgwg-central-controlled-ipran-00.txt

Katherine Zhao(Katherine.Zhao@huawei.com)GuangMing Yong (yanggm@gsta.com)

Jiehui Hu (hujiehui@huawei.com)

88th IETF @ Vancouver

HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 2

Introduction

• IP RAN (Radio Access Network) is a run solution using IP technology to

provide network services between UE devices and mobile core network.

• IP RAN has been widely used to provide varies access modes with high

scalability and flexibility, it reduced network construction cost and protects

codes of investments.

• However the existing IP RAN implementation needs to be improved due to

Manual configuration Point-by-Point

Complex network construct and service deployment

Low troubleshooting efficiency

• Central Controlled IP RAN (SDN enabled) can further improve the IP RAN and

resolve these problems

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Central Controlled IP RAN Use Case

ATM RNC

IP RNC/S-GW/MME

BSCSTM-1

GE

STM-1

LAST MILE ACCESS AGGREGATION

LTE/WiMax

Enterprise

UMTS HSPA

UMTS R99/R4

GSM/GPRSFE

ML-PPP E1

TDM E1

GE

IMA E1

RNC/SGW/MME

RSG

RSG

CSG

AGG

CSG

CSG

AGG

Controller

Main

BackupControl Agent

Control Agent

Control Agent

Central Controller

Control Agent

Control Agent

Control Agent

Control Agent

Control Agent

Control Agent

Applied in China Telecom’s Access and Aggregation Network

HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 4

BS1

BS2

SDN Domain

Controller

RNC/SGW/

MME/BSC

ControlAgent

Forwarding Node 1

Base Routing

ControlAgent

Forwarding Node 4

Base Routing

ControlAgent

Forwarding Node 2

Base Routing

ControlAgent

Forwarding Node 5

Base Routing

ControlAgent

Forwarding Node 3

Base Routing

ControlAgent

Forwarding Node 6

Base Routing

NMG

MPLSTDM/ATM/Ethernet TDM/ATM/Ethernet

Third Party App

CC IP RAN Network ArchitectureBS1

BS2

RNC/SGW/

MME/BSC

MPLSTDM/ATM/Ethernet TDM/ATM/Ethernet

RSGCSG

ASG

ASG

RSGCSG

BS1 CSG

Conversional IP RAN Network

Central Controlled IP RAN Network

• Major Control functions are moved to

controller from network devices

• Controller has E2E control capability

• Access, Aggregation and RSG are

forwarding devices.

• Programmability of controller

• Open to third party applications

• ASG: Aggregation Service Gateway

• BS: Base Station

• CSG: Cell Site Gateway

• RSG: Radio Service Gateway

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

System Architecture

Page 5

L2 Label PayloadLabel

Low Cost Device Open Architecture

MPLS en-caped packet

HOST ASR 9K

(single chassis OR cluster)

Controller

Access Node 1

CP-DP

MPLS internal networkWithout LDP

Access Node n

Functions of Controller

CP-DP control protocol features Network resource management features Network virtualization features Network protocol layer, IGP,LDP/RSVP Network service layer,L2 (VPWS/VPLS) VPN,

L3 VPN Fault, Alarm, NB-API

Functions of Forwarding Node

IP/ MPLS forwarding CP-DP protocol features Control Agent Light IGP for connectivity

HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 6

BS1

BS3

I1

I1

I2

I2

SDN Domain

I2RNC/SGW/MME/BSC

Control

Agent

CSG1

Base Routin

g

Control

Agent

CSG1

Base Routin

g

SDN Controller

ASG1

SDN Controller

ASG2

Control

Agent

RSG1

Base Routin

g

Control

Agent

RSG2

Base Routin

g

I6

I4

I4

I3I5

I5 Built-in Mode: Controller on Device

BS1

BS3

I1

I1

I2

I2

SDN Domain

SDN Controller

I2RNC/SGW/

MME/BSC

ControlAgent

CSG1

Base Routing

ControlAgent

CSG1

Base Routing

ControlAgent

ASG1

Base Routing

ControlAgent

ASG2

Base Routing

ControlAgent

RSG1

Base Routing

ControlAgent

RSG2

Base Routing

I2

I2

I2

I2

I3

I5

I5Stand-along Mode: Controller on Server

Controller Deployment Options

Page 7HUAWEI TECHNOLOGIES CO., LTD.

Central Controlled IP RAN Overview

Mobile Backhaul Central Controlled IP RAN

Simple O&M Free Service Planning, Plug and Play

Automatic protocols deployment and fast services

launch

Fast trouble shooting

ATM RNC

Last Mile Access Aggregation RNC/SGW/MME

RSG

RSG

CSG

BTS

NodeB / eNB

E1

Eth

IP RNC/S-GW/MME

NodeB

ATM

BSCSTM-1

STM-1

GE

AGG

AGG

CSG

CSG

Manual configuration point-by-point

ATM RNC

Last Mile Access Aggregation RNC/SGW/MME

RSG

RSG

BTS

NodeB / eNB

E1

Eth

IP RNC/S-GW/MME

NodeB

ATM

BSCSTM-1

STM-1

GE

CSG

CSG

CSG

AGG

AGG

Control Plane

Control Plane

Control Plane

Main

Backup

Central Controlle

r

Control Agent

Control Agent

Control Agent

Page 8HUAWEI TECHNOLOGIES CO., LTD.

Planning IP Address Dividing IGP Area Planning CSG&AGG ring relations

SDN-based Mobile Backhaul ： Free Services Planning

CSG

AGG AGG

CSG CSG

Planning IP Address Dividing IGP Area Planning CSG&AGG ring relations

Mobile Backhaul ： Complex services planning

SavingPlug and Play ， Zero Touch for Basic

Network

Main BackupCentral

Controller

Control Agent

Control Agent

Control Agent

Current IP RAN Access Solution

Central Controlled IP RAN

IGP Yes Automatic deployment

RSVP-TE Yes No

ProtocolSolution

Free Service Planning, Plug and Play

Page 9HUAWEI TECHNOLOGIES CO., LTD.

Automatic Protocols Deployment and Fast Services Launch

Mobile Backhaul Central Controlled IP RAN

Protocol-based point-by-point services launch Service-based end-to-end services launch

Improves efficiency of services launch

Lowers skill requirements of staff

Simple protocol Automatic configuration

ATM RNC

Last Mile Access Aggregation RNC/SGW/MME

RSG

RSG

BTS

NodeB / eNB

E1

Eth

IP RNC/S-GW/MME

NodeB

ATM

BSCSTM-1

STM-1

GE

AGG

AGG

CSG

CSG

CSG

IGP/LDP/RSVP

IGP/LDP/RSVP

IGP/LDP/RSVPIGP/

LDP/RSVP

IGP/LDP/RSVP

L2VPN

L2VPN

ATM RNC

Last Mile Access Aggregation RNC/SGW/MME

RSG

RSG

BTS

NodeB / eNB

E1

Eth

IP RNC/S-GW/MME

NodeB

ATM

BSCSTM-1

STM-1

GE

CSG

CSG

AGG

AGG

CSG

Control Plane

Control Plane

Control Plane

Main

Backup

Central Controlle

r

Control Agent

Control Agent

Control Agent

Virtual-cluster enable

Configure remote-interface

Page 10HUAWEI TECHNOLOGIES CO., LTD.

ATM RNC

Last Mile Access Aggregation RNC/SGW/MME

RSG

RSG

CSG

BTS

NodeB/eNB

E1

Eth

IP RNC/S-GW/MME

NodeB

ATM

BSCSTM-1

STM-1

GE

AGG

AGG

CSG

CSG

Fast Trouble shooting

Mobile Backhaul SDN-based Mobile Backhaul

ATM RNC

Last Mile Access Aggregation RNC/SGW/MME

RSG

RSG

BTS

NodeB/eNB

E1

Eth

IP RNC/S-GW/MME

NodeB

ATM

BSCSTM-1

STM-1

GE

CSG

CSG

CSG

AGG

AGG

Control Plane

Control Plane

Control Plane

Main

Backup

Central Controlle

r

Control Agent

Control Agent

Control Agent

NMS NMS

failure failure

② Trouble shooting on each node

① Each node sends alarm independently

② Trouble shooting only on Central Controller

① Alarm analysis for Locating root causes of fault

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