a test scenario of mpm based admission control device on ngn cjk test-bed
DESCRIPTION
A test scenario of MPM based admission control device on NGN CJK test-bed. 15th NGN-WG 200 9 . 4.8-10 Test-bed Ad-hoc Group Norihiro FUKUMOTO , Hideaki YAMADA KDDI (KDDI R&D Labs.) [email protected] TEL: +81 49 278 7390, FAX: +81 49 278 7510. Agenda. NGN CJK test-bed - PowerPoint PPT PresentationTRANSCRIPT
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CJKTest-bed
CJKTest-bed
A test scenario of MPM based admission control device
on NGN CJK test-bed
15th NGN-WG 2009.4.8-10Test-bed Ad-hoc Group
Norihiro FUKUMOTO, Hideaki YAMADA KDDI (KDDI R&D Labs.)
[email protected]: +81 49 278 7390, FAX: +81 49 278 7510
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Agenda
NGN CJK test-bed- Configuration of NGN CJK test-bed- Study phases
MPM based Admission Control Device- The purpose of Admission Control Device- Installation plan on NGN CJK test-bed- Burst Metrics- The behavior of Admission Control Device
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Configuration of CJK test-bed
Japan Core Network(TTC)
MPM (Router with mirror port and RTP translator)
Korea (TTA)
CPE (PC with RTP/RTCP client
software)CPE (RTP/RTCP client appliance)
MPM (Router with mirror port and RTP translator)
China (CCSA)
CPE (PC with RTP/RTCP
client software) CPE (RTP/RTCP client appliance)
MPM (Router with mirror port and RTP translator)
SIP Server SIP Server
CPE (PC with RTP/RTCP client
software)
CPE (RTP/RTCP client appliance)
SIP Server
RACF
RACF
RACF
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CJK NGN Test-bed
Phase I: 2006 3rd/4th Quarter (Completed)- Network Connectivity- Scenario 2 and 4 only (2 CS and 2 domains)
Phase II: 2007 1st/2nd Quarter (Completed)- Scenario 1, 3 (simpler version of 2 and 4, single domain) and 5
Phase IV: 2008 3rd ~ 2009 2nd Quarter- Performance Evaluation of RTP/RTCP-based MoIP and IPTV services- Performance Monitoring Scenarios 6-3 and 6-4- Initial RACF Interoperability testing : Scenario 7- Testing of RACF and RTP/RTCP-based MPM Interactions- IPTV Interoperability testing
Test Admission Control Device in parallel
Study phases (Study scenarios)
Our Suggestion
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The purpose of the admission control device
For disaster recoveryA fire wall, which confines local congestion caused by disasters to local areas
An admission control scheme, which works independently and locally
For avoiding excessive traffic in test-bed Detect excessive traffic and suppress them automatically
In Practical NGN
In CJK NGN test-bed
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Admission control device
Admission control device is implemented- An implementation of MPM subset - It is in accordance with Y.2173- It works based on full passive measurement
MPM
PMR-FE
PME-FE
Mr
Mp
Mu
Other NGN Providers’
MPM
Mi
Admission Control
Function
Mu handler
Mi handler
Mr handler
Passive Measurement
Active Measurement
PMP-FEMeasurement
ProcessingNetwork-wide Measurement
Admission Control Device
Fig. Admission control device, a subset of MPM with an admission control function
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Installation plan of Admission Control Device on CJK NGN test-bed
Japan Core Network(TTC)
MPM (Router with mirror port and RTP translator)
Korea (TTA)
CPE (PC with RTP/RTCP client
software)CPE (RTP/RTCP client appliance)
MPM (Router with mirror port and RTP translator)
China (CCSA)
CPE (PC with RTP/RTCP
client software) CPE (RTP/RTCP client appliance)
MPM (Router with mirror port and RTP translator)
SIP Server SIP Server
Japan Access Network (TTC)
Call generator
CPE (RTP/RTCP client appliance)
SIP Server Admission Control Device
RACF
RACF
RACF
Excessive calls
Additional calls in case of congestion will be rejected
automatically
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Burst Metrics which represent congestion level
Gap period Gap period
Burst period
Lost packet
Arrived packet
Following four parameters represent congestion level- Gap Density : Packet loss ratio in Gap periods- Gap Duration : Mean duration of Gap periods- Burst Density : Packet loss ratio in Burst periods- Burst Duration : Mean duration of Burst periods
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Burst Metrics – Four State Markov Model
Fig. Four state Markov model
Defined in RFC 3611 (RTCP XR)- Separate the RTP packet stream RTP into two periods
Burst period: High proportion of packet loss Gap period: Low packet loss
2
C23
3
C22
1
C14
4
C31
Burst Gap
C32 C41C13
C33 C11
state 1: received a packet during a gapstate 2: received a packet during a burststate 3: lost a packet during a burststate 4: lost an isolated packet during a gap
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The behavior of the admission control device(Measurement the burst metrics of each segment)
Fig. Burst metrics measurement scheme of the admission control device
Client A Client BSBC
Segment A Segment B
I. RTP packets are sent and some of them has lost in the networks
lost in network A
lost in network B
II. Packet loss pattern of the whole network is feedbacked as Loss RLE Report Block in RTCP XR
III. Proper packet loss pattern in the segment B is calculated from the packet loss pattern of segment A and whole network
Burstiness of packet loss in each network segment will be calculated. The burstiness represents congestion level.
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The behavior of the admission control device(Admission control)
The device modifies signaling packets to perform admission control based on the measured QoS of each network segment
CPE SIP ProxyAdmission Control Device
INVITE
480 Temporarily Unavailable
m=audio 50000 RTP/AVP 0 18a=rtpmap:0 PCMU/8000a=rtpmap:18 G729/8000m=video 51000 RTP/AVP 31a=rtpmap:31 H261/90000
m=audio 50000 RTP/AVP 18a=rtpmap:18 G729/8000
INVITE
m=audio 50000 RTP/AVP 0 18a=rtpmap:0 PCMU/8000a=rtpmap:18 G729/8000m=video 51000 RTP/AVP 31a=rtpmap:31 H261/90000
INVITE
Pass through
(A) Codec limitation(B) Admission control
Fig. The behavior of the admission control device
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Thank you for your kind attentions.
Q&A
This work is partly supported by the National institute of Information and Communications Technology (NICT).