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Performance of a Mixed-Traffic CDMA2000 Wireless Network With Scalable Streaming Video
Joe Huang, Richard Yuqi Yao, Yong Bai, and Szu-Wei WangIEEE Transactions on Circuits and Systems for Video Technology, Vol. 13, No. 10,
October 2003
Presentation by Tony Sung, MC Lab, IE CUHK22nd March 2005
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The Simulation
Event-driven
Multi-cell Multi-user
Mixed-Traffic
Scalable Video
Dynamic Rate Control
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Air Interface
Power:
20W Max., 16W for traffic, 4W for pilot, paging and sync
Arrangement:
19 3-sector cells on a hexagonal regular grid
Path-loss:
ITU recommended model which leads to a cell size around 3.4km based on a voice link budget
Fading:
Shadow fading, S.D. = 8dBCorrelation length = 200mStation-station correlation = 0.5
Mobility:
Data – PedestrianVoice – Mixture of Pedestrian and Vehicular
Power Allocation:
Pre-simulated link-level data, decision made only once a second
Handoff:
Dynamic thresholdSoft/softer for FCH only,decision made only once a second
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Traffic Model
Voice Data Video
Poisson process Web-browsing model
Poisson process
Holding time:Exponential, with mean = 90s
Poisson session arrivalGeometrically distributed pages per session, reading time, and object countPacket size follows a Pareto distribution
Clip duration:Shifted exponential with min = 5s, mean = 60s
Bitrate:14.75-64.75kbpsor 34.75kbps