Regional Multicasting
Testbed in China
Weisheng Hu
1) State Key Lab of Advanced Optical Communication
Systems and Networks (Shanghai Jiao Tong University),
2) Task Force of 3TNET, 863 Program,
Shanghai 200240, China
Shanghai Jiao Tong University, China
2007/3/25
OFC, Anaheim, CA, USA
Outline
1.
2.
3.
4.
5.
Motivation
The Overlay Model
Prototype Demonstration
Field Trial in 3TNET
Conclusions
Shanghai Jiao Tong University, China
2007/3/25
OFC, Anaheim, CA, USA
Motivation: Broadband Applications
• We are looking for “killer applications”.
• General consensus is multimedia services for
communication and entertainment.
TV Broadcast/
Interactive
More bandwidth
Multicasting
‘Always on’
More security
Better availability
Strict quality of
service
Shanghai Jiao Tong University, China
ENTERTAINMENT
•
•
•
•
•
•
VOD
Gaming
E-mail, chat, and
instant message
Video
Communication
Unified
messaging
COMMUNICATION
Requirements:
On-line Music or download IP based/Telephony
2007/3/25
OFC, Anaheim, CA, USA
Challenges
• Multicast is critical for many applications:
– Content distribution, IPTV, HDTV……
– Multicast for bandwidth efficiency
• Existing solutions:
– xDSL: for “broadband” at ~2Mb/s mainly on Internet, not
enough for DTV/HDTV.
– Cable TV: uni-directional (broadcasting) without interaction.
– IP network: efficient and flexible bandwidth, but taking risks
for mission-critical operations (e.g. TV) at reliable quality.
• 3TNET: A national project of China during 2002-06.
Shanghai Jiao Tong University, China
2007/3/25
OFC, Anaheim, CA, USA
Outline
1.
2.
3.
4.
5.
Motivation
The Overlay Model
Prototype Demonstration
Field Trial in 3TNET
Conclusions
Shanghai Jiao Tong University, China
2007/3/25
OFC, Anaheim, CA, USA
Optical multicast vs. IP multicast
IP multicast:
Optical multicast:
• Flexible group
management
• No store and forward
delay
• Not scalable in
routing and address
management
• Coarse granularity
• Lack of QoS and TE
support
• Improved optical
network performance
• Enhanced virtual
connectivity
• Security issues
Shanghai Jiao Tong University, China
2007/3/25
OFC, Anaheim, CA, USA
Our scheme: to integrate both merits
IP multicast:
To provide
carrier-class
Optical
multicast:
• Flexible group
management
large-scale reliable live
• No store and forward
services (e.g.DTV/HDTV)
delay
to end users.
• Coarse granularity
• Not scalable in
routing and address
management
To
merits
• Leverage
Lack of the
QoS
andofTE
efficient IP multicast and
support
reliable
high-speed
optical
multicast
in a
• Security
issues
multicasting network.
Shanghai Jiao Tong University, China
• Enhanced virtual
connectivity
• Improved optical
network performance
2007/3/25
OFC, Anaheim, CA, USA
The Overlay Model
• Optical Multicast in the core.
• IP Multicast at the edge.
Overlay Multicast Network
Optical Multicast
(core)
Shanghai Jiao Tong University, China
IP multicast
(edge)
End users
(access)
2007/3/25
OFC, Anaheim, CA, USA
Multicast Flow Aggregation
Great Gap between one light tree and one flow!
SDH/SONET
(Mb/s)
Ethernet
(Mb/s)
IP Multicast
Flows
Bandwidth
(Mb/s)
155
100
VOD
~2
622
1000
DTV
~6
HDTV
~25
2.5 Gb/s
Multicast Flow Aggregation can significantly
reduce the number of light trees in the core .
Yi Zhu et al., JSAC, June 07
Shanghai Jiao Tong University, China
2007/3/25
OFC, Anaheim, CA, USA
Outline
1.
2.
3.
4.
5.
Motivation
The Overlay Model
Prototype Demonstration
Field Trial in 3TNET
Conclusions
Shanghai Jiao Tong University, China
2007/3/25
OFC, Anaheim, CA, USA
Prototype Demonstration
Management Plane:
Service Plane:
Scheduling and
Aggregation
Network and Service
Mc-IP
RCU/
UNI-C
Control Plane:
Mc-ASON
NNI and UNI
extensions
UNI-N
/NNI
LCU/
UNI-C
GMPLSextension
EU
SNMP
CCI
O/E
Data Plane:
Mc-OXC
HE
(TV)
E/O
Mc-OXC
Weisheng Hu et al., ECOC’03 (Invited)
Weiqiang Sun et al., OFC’05
Xueqing Wei et al., ECOC’05
Yi ZhuJiao
et al.
Globecom’05
Shanghai
Tong
University, China
O/E
Mc-R1
Mc-R2
2007/3/25
OFC, Anaheim, CA, USA
Performance Measurement
Delay and jitter vs. link load
30000
100
IP over OTN
All IP
25000
20000
15000
IP over OTN
All IP
10000
5000
0
Delay Jitter (us)
Latency (us)
80
60
40
20
0
40
50
60
70
Link Load (%)
80
40
50
60
70
80
Link Load (%)
Overlay Mc-IP over Mc-ASON has lower delay and jitter
than pure Mc-IP does.
Weiqiang Sun et al., OFC’05
Shanghai Jiao Tong University, China
2007/3/25
OFC, Anaheim, CA, USA
Control Plane Extension
• NNI: Compatible with IETF (RFC4461 and several drafts).
• UNI: Submitted a document to OIF in 2005.
Operations:
•
•
•
•
Signaling trace
Shanghai Jiao Tong University, China
Setup
Teardown
Graft
Prune
UNI P2MP Object
extended for
dynamic P2MP.
2007/3/25
Xueqing Wei et al., ECOC’05
OFC, Anaheim, CA, USA
Signaling Experimental Results
Test cases and operation time
Tree/
Time
Operation Notation
No. Path ID
(msec)
100 Mb/s Ethernet Hub
UNI-C/A
UNI-C/D
GE
GE
GE
UNI-C/B
ST
M
-6
STM-64
OXC/2
Protocol
Analyzer
STM-64
STM-64
Traffic
Generator
OXC/4
4
OXC/1
OXC/3
GE
UNI-C/C
Shanghai Jiao Tong University, China
Network
Manager
1
1
Setup
{0, 1, {3,4}}
119
2
2
Setup
{0, 1, {2}}
70
3
2
Grafting
{2, 1, {4}}
55
4
1
Pruning
{1, 1, {3}}
22
5
1
Teardown {1, 1, {4}}
23
Xueqing Wei et al., ECOC’05
2007/3/25
OFC, Anaheim, CA, USA
Service Scheduling
Service Plane
UNI (P2MP)
GMPLS with
P2MP extension
Head IP
Network
HE
DVB-IP
Leave
CU
Scheduler
SNMP
Control
Plane
SNMP
Root
CU
Aggregation
Router
Data Plane
DWDM Links
Mc-OXC
Mc-OXC
Mc-ASON
•IP multicasting group management
•Dynamic P2MP light-trees
•Fast TV channel zapping
Shanghai Jiao Tong University, China
UNI (P2MP)
IP
Access
Router
End
User
Yi Zhu et al., Globecom’05
2007/3/25
OFC, Anaheim, CA, USA
Interim Summary to Prototype Demo
• Merits of Overlay Multicasting
Network (edge Mc-IP over core McASON):
– Better performance with lower delay
and jitter.
– More scalable with reduced Multicast
state.
– More reliable and improved QoS.
– Better survivability.
– Could be used in 3TNET Field Trial
Shanghai Jiao Tong University, China
2007/3/25
OFC, Anaheim, CA, USA
Outline
1.
2.
3.
4.
5.
Motivation
The Overlay Model
Prototype Demonstration
Field trial in 3TNET
Conclusions
Shanghai Jiao Tong University, China
2007/3/25
OFC, Anaheim, CA, USA
3TNET Project
• A national project at ~USD30m funded by
“863” Program of China.
• Goals: to build a high performance trial
network to support large-scale concurrent
streaming media and interactive multimedia
broadband service (DTV/DHTV) in Yangzte
River Delta centered at Shanghai.
2002
Initiation
2003-2004
Specification
Development
Shanghai Jiao Tong University, China
2005
Field Trail
2006
…
2007/3/25
OFC, Anaheim, CA, USA
Participants
Task Force: five members, including SJTU
• Carriers and SPs: China
Telecom, SiTV, CETV, B-Star
• Venders: Huawei, ZTE,
Fiberhome, Harbor, Amoi,
Zoom
• Universities: IEU, PKU, SJTU,
Tsinghua, Fudan, USTC,
BUPT, ZJU, SEU
• Institutes: CAS (IoA), RITT,
ABS
Shanghai Jiao Tong University, China
2007/3/25
OFC, Anaheim, CA, USA
3TNET: A Layered View
Access
Metro
Core
e-Shanghai
U N IVER SIT Y
Application
IP DTV/HDTV
Application Supporting Environment (Proprietary Middleware)
3TNet
Routing
Tb/s Router
Tb/s ASON
Transport/
Switching
Wu Jiangxing, APOC’05 (plenary)
Shanghai Jiao Tong University, China
Tb/s DWDM
2007/3/25
OFC, Anaheim, CA, USA
TV Station: DTV and HDTV
• Headend DVB-IP: to provide 115
digital television channels (DTV) at
~6Mb/s and 1 HDTV (high definition TV)
at ~25Mb/s.
1) To Network TVs
Shanghai Jiao Tong University, China
SJTU
2007/3/25
OFC, Anaheim, CA, USA
Mc-ASON: P2MP
2) To ASON
CT-联洋
HW-7
CT-桂林
HW-5
ZJU
HW-9
SiTV
HW-4
CT-明华
HW-10
IP组播流
CT-北蔡
HW-6
CT-武宁
HW-8
SJTU-徐汇
FH-3
SEU
HW-20
B-STAR
HW-3
点到多点连接
SJTU-MH-1
SJTU-MH-2
FH-2
HW-1
SJTU-E5
FH-1
南京
杭州
上海
没有上下路的组播光交叉连接
有GE上下路的组播光交叉连接
点到多点连接
视频头端
IP路由器
Shanghai Jiao Tong University, China
波分复用设备
IP组播流
2007/3/25
OFC, Anaheim, CA, USA
Mc-ASON/GMPLS
• Benefits:
– Fast provisioning
– Easier network
operation
– Higher network
reliability
– Simpler planning
and design
Huawei
– Scalability
OSN9500
– Multicasting capability
– Multi-vendor inter-operability
Shanghai Jiao Tong University, China
Fiberhome
FonsWeaver780
2007/3/25
OFC, Anaheim, CA, USA
Multicast Convergence IP Network
ACR: Access Convergence Router
EMD: Ethernet-based
Multiplexer and
Demultiplexer
RIU: Remote
Interface Unit
End users: ~41 Mb/s per each
Shanghai Jiao Tong University, China
2007/3/25
OFC, Anaheim, CA, USA
ACR in 3TNET
• ACR (Access Convergence
Router)
ACR
– Highly centralized access router.
– For tree topology in access
networks.
• Key features of ACR:
– Multiple rate flow classification
and control.
– Mixed usage of private and public
addresses.
– Greater than 2000 dynamic
multicast trees.
Huawei
Shanghai Jiao Tong University, China
2007/3/25
OFC, Anaheim, CA, USA
Field Trial in Yangtze River Delta
Yangtze River
Shanghai Jiao Tong University, China
Yangtze
River Delta:
centered at
Shanghai,
including
Hangzhou,
and Nanjing.
2007/3/25
OFC, Anaheim, CA, USA
End Users and Access Zones
• Shanghai
– SiTV station: 116
DTV Channels
(including HDTV)
– B-Star: 12000
Households
– China Telecom:
1000 FTTH
Households
– SJTU: 5000 users
Nanjing
300k
m1
0G D
WDM
m
0k
0
2
G
40
Shanghai
DW
DM
Hangzhou
• Hangzhou
– ZJU: 5000 users
• Nanjing
– SEU: 5000 users
Shanghai Jiao Tong University, China
2007/3/25
OFC, Anaheim, CA, USA
Inter domain Multicasting
Nanjing
Shanghai
Hangzhou
HW-5
HW-7
HW-10
HW-9
HW-4
STM-64
Links
FH-3
HW-8
HW-6
Domain II
HW-2
Domain I
HW-3
HW-1
FH-2
FH-1
Test Cases and times
Operation
Notation
Time (msec)
Setup
{HW-4, (FH-3, FH-1)}
271
Pruning
Grafting
{HW-4, (FH-3)}
{HW-4, {FH-3, FH-1}}
208
222
Shanghai Jiao Tong University, China
J Wang, OFC2007, OMJ3
2007/3/25
OFC, Anaheim, CA, USA
Outline
1.
2.
3.
4.
5.
Motivation
The Overlay Model
Prototype Demonstration
Field Trial in 3TNET
Conclusions
Shanghai Jiao Tong University, China
2007/3/25
OFC, Anaheim, CA, USA
Conclusions
• 3TNET is a circuit- and packet-switched
hybrid integrated network to support largescale inactive and live streaming media.
• A large-scale field trial was carried out in
Yangtze River Delta centered at Shanghai.
• An Overlay Mc-IP over Mc-ASON with
GMPLS extension is field trialed to deliver
115 DTVs at ~6Mb/s and 1 DHTV at ~25Mb/s
to ~30000 users.
• Much more users will be accessed into the
3TNET in the next five years.
Shanghai Jiao Tong University, China
2007/3/25
OFC, Anaheim, CA, USA
Thank you!
wshu@sjtu.edu.cn
Shanghai Jiao Tong University, China
2007/3/25
OFC, Anaheim, CA, USA