Project 2: Cross-Layer Approach for WLAN Capacity Planning
IEEE 802.11 wireless local area networks (WLANs)
– Extensive efforts are going on for QoS provisioning
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Cellular/WLAN interworking is a promissing business model–
Network capacity: number of QoS guaranteed voice or video flowsIEEE 802.11 MAC performance analysis
– Saturated traffic: bulk data transfer applications
– Non-saturated traffic: voice/video applications (bursty traffic)
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Open issue: voice/video network capacity analysis
Cross-Layer Analytical Framework
Network/MAC layer joint analytical framework
– Single-server queuing analysis at network layer: determine bandwidth requirement to guarantee delay or loss performance
– Non-saturated 802.11 MAC modeling
– Optimal MAC configuration to satisfy network-layer capacity requirement as well as maximize network capacity
– Contention window based service differentiation
VoIP over WLAN
Two-way voice conversation
– Downlink flows aggregated at the access point (AP)
– Service differentiation between mobiles and AP
Optimal MAC Configuration
Proper MAC parameters are solved to balance the downlink/uplink throughputs
Proper MAC parameters are solved to maximize the admission region
