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1. Central
Controlled
IPRAN
dra0-­‐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

2. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential n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
Ø Manual configuration Point-by-Point
Ø Complex network construct and service deployment
Ø Low troubleshooting efficiency
• Central Controlled IP RAN (SDN enabled) can further improve the IP RAN and
resolve these problems

3. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Central Controlled IP RAN Use Case
ATM RNC
IP RNC/S-GW/MME
BSC
GE
STM-1
LAST MILE ACCESS AGGREGATION
LTE/WiMax
Enterprise
UMTS HSPA
UMTS R99/R4
GSM/GPRS
FE
ML-PPP E1
TDM E1
GE
IMA E1
RNC/SGW/MME
RSG
RSG
CSG
AGG
CSG
CSG
AGG
Controller
Main
Backup
Control
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

4. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential nPage 4
BS1
BS2
SDN
Domain
Controller
RNC/SGW/
MME/BSC
Control
Agent
Forwarding Node 1
Base
Routing
Control
Agent
Forwarding Node 4
Base
Routing
Control
Agent
Forwarding Node 2
Base
Routing
Control
Agent
Forwarding Node 5
Base
Routing
Control
Agent
Forwarding Node 3
Base
Routing
Control
Agent
Forwarding Node 6
Base
Routing
NMG
MPLS
TDM/ATM/Ethernet TDM/ATM/Ethernet
Third Party
App
CC IP RAN Network Architecture
BS1
BS2
RNC/SGW/
MME/BSC
MPLS
TDM/ATM/Ethernet TDM/ATM/Ethernet
RSG
CSG
ASG
ASG
RSG
CSG
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

5. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
System Architecture
nPage 5
L2 Label Payload
Label
Low Cost Device Open Architecture
MPLS en-caped packet
HOST
ASR 9K
(single
chassis
OR
cluster)
Controller
Access Node 1
CP-DP
MPLS internal network
Without LDP
Access Node n
l Functions of Controller
p CP-DP control protocol features
p Network resource management features
p Network virtualization features
p Network protocol layer, IGP,LDP/RSVP
p Network service layer,L2 (VPWS/VPLS) VPN,
L3 VPN
p Fault, Alarm, NB-API
l Functions of Forwarding Node
p IP/ MPLS forwarding
p CP-DP protocol features
p Control Agent
p Light IGP for connectivity

6. HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 6
BS1
BS3
I1
I1
I2
I2
SDN
Domain
I2
RNC/
SGW/
MME/
BSC
Contr
ol
Agen
t
CSG1
Base
Routin
g
Contr
ol
Agen
t
CSG1
Base
Routin
g
SDN
Controller
ASG1
SDN
Controller
ASG2
Contr
ol
Agen
t
RSG1
Base
Routin
g
Contr
ol
Agen
t
RSG2
Base
Routin
g
I6
I4
I4
I3
I5
I5 Built-in Mode:
Controller on Device
BS1
BS3
I1
I1
I2
I2
SDN
Domain
SDN
Controller
I2
RNC/SGW/
MME/BSC
Control
Agent
CSG1
Base
Routing
Control
Agent
CSG1
Base
Routing
Control
Agent
ASG1
Base
Routing
Control
Agent
ASG2
Base
Routing
Control
Agent
RSG1
Base
Routing
Control
Agent
RSG2
Base
Routing
I2
I2
I2
I2
I3
I5
I5
Stand-along Mode:
Controller on Server
Controller Deployment Options

7. Page 7
HUAWEI TECHNOLOGIES CO., LTD.

Central Controlled IP RAN Overview
Mobile Backhaul Central Controlled IP RAN
nSimple O&M
ØFree Service Planning, Plug and Play
ØAutomatic protocols deployment and fast services launch
Ø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
BSC
STM-1
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
BSC
STM-1
CSG
CSG
CSG
AGG
AGG
Control
Plane

Control
Plane

Control
Plane

Main
Backup
Central
Controller
Control
Agent

Control
Agent

Control
Agent


8. Page 8
HUAWEI 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
Plug and Play，Zero Touch for Basic Network
Main Backup
Central
Controller
Control
Agent
Control
Agent
Control
Agent
Current IP RAN
Access Solution
Central Controlled IP
RAN
IGP Yes Automatic deployment
RSVP-TE Yes No
Protocol
Solution
Free Service Planning, Plug and Play

9. Page 9
HUAWEI 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
BSC
STM-1
AGG
AGG
CSG
CSG
CSG
IGP/LDP/
RSVP
IGP/LDP/
RSVP
IGP/LDP/
RSVP
IGP/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
BSC
STM-1
CSG
CSG
AGG
AGG
CSG
Control
Plane

Control
Plane

Control
Plane

Main
Backup
Central
Controller
Control
Agent

Control
Agent

Control
Agent

Virtual-cluster
enable
Configure remote-
interface

10. Page 10
HUAWEI 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
BSC
STM-1
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
BSC
STM-1
CSG
CSG
CSG
AGG
AGG
Control
Plane

Control
Plane

Control
Plane

Main
Backup
Central
Controller
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

11. Thank you
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