802.20 Traffic Models Discussion July 24, 2003. Traffic model philosophy Minimal approach: –Eval group needs to model some application examples to demonstrate/compare/stress.

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Presentation transcript:

Traffic Models Discussion July 24, 2003

Traffic model philosophy Minimal approach: –Eval group needs to model some application examples to demonstrate/compare/stress performance: –Cannot ignore Web-browsing - (interactive, can be lots of bytes) –Add some VoIP - (real-time, delay/loss sensitive) –Throw in some fixed-size file transfers for throughput tests –Only Web-browsing & VoIP model. Why do more? Comprehensive approach: –Determine list of applications that will be used in MBWA system –Decide on traffic models (if there are contributions) –Reference models for general use; some of them may not be used for comparisons

Traffic types Web browsing FTP (File transfer) WAP (Wireless Application Protocol) Voice / VoIP Video telephony / videoconference Audio streaming Video streaming Gaming File-sharing (peer-to-peer) PDA remote synchronization Instant Messaging Multimedia messaging 3G type - broadcast/multicast/presence (see May mtg doc)

User Scenarios Traffic & application details depend on user & device scenario. Some examples: Laptop user: –Large display, high power, large storage, portable PDA: –Medium display, medium power, medium storage, mobile SmartPhone: –Small display, low power, low storage, very mobile Telematics, remote cameras

Traffic modeling scope/approach Only model active user, not subscriber Only model application traffic, not traffic mix Modeling of adaptive applications –only if there is strong need/demand

Traffic Models Prioritized Agenda Freeze scope of traffic models group, list of traffic types, list of usage scenarios –Proposed list on , 2 weeks comment period, ~Aug 8 General approach –uplink, downlink, background loading –At least initial comments by ~ Aug 8, no major surprises later Consensus on one type after other –Web-browsing, VoIP, FTP.. Conference calls ( is main medium) Aug 7 Thu, 12 noon-1:30noon EDT (3pm-4:30pm GMT) Aug 27 Wed, 12 noon-1:30noon EDT (3pm-4:30pm GMT) (can move second call to share pain if needed)