Label Switched Path (LSP) Dynamical Provisioning Performance Metrics - - PowerPoint PPT Presentation

第 1 页 2007年3月16日 WWW.CTTL.COM.CN

Label Switched Path (LSP) Dynamical Provisioning Performance Metrics in Generalized MPLS Networks

draft-xie-ccamp-lsp-dppm-00.txt

Guoying Zhang China Academy of Telecommunication Research, MII, P.R.China 2007.3

第 2 页 2007年3月16日 WWW.CTTL.COM.CN

Requirements

Requirements of dynamical provisioning capability in GMPLS Networks:

• Interactive Broadband Multimedia Services
• Video on Demand
• Digital Video Brocasting-IP, IPTV
• etc.

Growing needs for measuring and characterizing LSP provisioning performance in GMPLS networks

• Mapping provisioning capability to application requirements
• GMPLS Network maintenance and optimization.

第 3 页 2007年3月16日 WWW.CTTL.COM.CN

Motivations

China High Performance Broadband Information Network (3TNET) ----863 project Sponsored by the Ministry of Science and Technology

• Circuit-switched and packet-switched hybrid network to

support large-scale interactive broadband streaming media.

• Network Infrastructure: IP +ASON/GMPLS+DWDM
• Services: VOD, DVB-IP, high speed Internet access

ASON/GMPLS network with burst scheduling and multicasting enhanced features. A large-scale field trial carried out in the Eastern China.

第 4 页 2007年3月16日 WWW.CTTL.COM.CN

3TNet Topology

信息大楼 电信桂林 电信联洋 电信北蔡 电信武宁 文广 电信浙江 长途局

CNGI- CERNET2 CERNET SJTU-NET

电信接入示范区 浙江大学试验区 上海交通大学试验区 宽带网络中心及古北接入示范区 文广互动网络电视台 图 例

直播电视流，GE 点播电视流，GE 骨干网络光纤，STM-64 接入网络光纤，10GE 接入网络光纤，GE 接入网络光纤，FE IP网络，GE IP网络，FE

城域光网络

IP网络，10GE

ZJU-NET CERNET

其他应用，GE 宽带中心 交大闵行 浙大

电信江苏 长途局 电信上海 长途局

江苏东南 大学试验区

第 5 页 2007年3月16日 WWW.CTTL.COM.CN

CPN

ASON

Sw i t ch Sw i t ch

UNI-C

O XC 1 O XC 1 O XC 4 O XC 4 O XC 3 O XC 3 O XC 2 O XC 2

CS Server CDP Server IP Network

R

• ut er

R

• ut er

R

• ut er

R

• ut er

Media Sever

BMG ACR BMG

. . . . . .

VOD: Burst Scheduled LSP

Finely tuned connection scheduling model

• Periodic LSP provisioning

for 5 experimental regions VOD media server.

• Hold a LSP only 10s,then

release.

第 6 页 2007年3月16日 WWW.CTTL.COM.CN

DVB-IP: Dynamic Multicast LSP

Multiple FE connections bet . HE and edge device Aggregation node Multiple channels in each HE connection One P 2MP LSP Tunnel for each HE connection HE HE HE AM

• 1

End User s OXC

• 4

OXC-3 OXC-1 OXC

• 2

LAN Switch OXC

• 5

HE : Head End AM : Access Module OXC: ASON Cross Connect Automatically Provisioned P2MP LSP Tunnel IP Multicast stream /Channel End User s End User s AM

• 2

AM

• 3

Channel 1 Channel 2 Channel p Channel q

Arbitrary provisioning for DVB-IP head-ends

第 7 页 2007年3月16日 WWW.CTTL.COM.CN

Measured Performance in the Field Trial

Delay Variance observed at any load. Higher load will lead to higher variance and longer setup/release delay.

500 1000 1500 2000 2500 0.01 0.1 1 5 20 40 60 80 95 99 99.9 99.999 500 1000 1500 2000 2500 2000 4000 6000 8000 10000 12000 14000 16000

Counts Setup Delay (ms) Cumulative Counts

Average setup delay 668 ms 99.9% setup delay less than 1000ms

100 200 300

200 400 600 800 1000

Setup Delay (ms) Request Sequence 500ms/100ms

第 8 页 2007年3月16日 WWW.CTTL.COM.CN

Defined Metrics & Methodology

IP Network Under Test Testing Tool

• GMPLS control channel testing is similar

to IP network testing

• Round-trip delay
• LSP DPPM uses the framework of IPPM.
• Measured performance
• Unidirectional LSP Setup Delay
• Bidirectional LSP Setup Delay
• LSP Graceful Release Delay
• Statistical performance
• Min/Max/Median/Percentile
• Variance
• Blocking probability

GMPLS Network Control Channel Under Test Testing Tool

第 9 页 2007年3月16日 WWW.CTTL.COM.CN

Open Issues

Performance metrics for LSP reroute & P2MP. Enhancement of MIBs: support monitoring of LSP provisioning metrics on GMPLS nodes, for maintenance/optimization. Etc.