Ｐ age <date> 1September 2008 - 1

Presence Enriched Terminal QoS Monitoring

Diego Costantini NEC Europe Ltd., Heidelberg, Germany

costantini@nw.neclab.eu

September 2008 - 2

Agenda

• Problem outline• Architecture overview• Monitoring layer

– Network partitioning– Description

• Enriched presence service• Implemented prototype• Conclusions and future work

September 2008 - 3

• VoIP voice quality information for:– Buddies placed worldwide– Available before and during any call

A use case for a QoS monitoring framework

• Provide a column reporting the expected quality to buddies

• This can influence the choice of the kind of communication• Audio call• Video call• E-mail• Instant messaging• ...

September 2008 - 4

Architecture Overview• Requirements

– General (cover many network topologies)

– Scalable (cope with large number of users)

• Layered approach– User– Service– Monitoring (active + passive)

• Multi-purpose layers– Easy to replace/extend components

• Vertical domains– VoIP– IPTV– …

Monitoringsystem

Monitoringsystem

QualityservicesQuality

services

Userapplications

Userapplications

Monitoring layer

Service layer

User layer

September 2008 - 5

Network Topology

Terminalsvs.

Infrastructure

Terminalsvs.

Infrastructure

• Terminal

• SIP Proxy

• Media Gateway

September 2008 - 6

Network Partitioning• Monitoring probes in the infrastructure

- All monitoring load on edge nodes (load balancing)- Single points of failure (use replication)+ Operators can keep a central role acting as B2BUA+ Granular point of view of the network for troubleshooting+ No code redundancy on each terminal+ No terminal equipment modification

+ Old terminal devices can still take advantage of the monitoring system (retro-compatibility)

+ New terminal devices could benefit of additional services enabled by new quality information

+ More scalable (partitioning)

September 2008 - 7

Monitoring Layer

• Signaling/media monitor (RTC-Mon)• IETF drafts:

• SIP vq-rtcpxr• SIPFIX (in progress)

• Collector

• Tester• IETF drafts:

• SIP answer mode• SDP media loopback

September 2008 - 8

Service Layer/User Layer

• Ext. Presence service• XMPP• SIMPLE• …

• MOS calculator• E-model• IPTV

• XMPP/SIP client• Customized Spark

September 2008 - 9

Current Prototype

• Monitoring through RTC-Mon

• Ad-hoc presence service Openfire XMPP & OpenSER SIP

• PHP interface & XML on Snom360 Customized Spark

• RRD graphs with recent trends

September 2008 - 10

Conclusions

• Presented Enriched Terminal QoS Monitoring– Proactive and scalable monitoring layer– Call quality extended presence service– Integration with IETF drafts

• Future work– Full presence service integration– Large scale experimental analysis– Mediation & aggregation– IPTV applications