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home > research > monthly presentations > summer 2008
 

Summer 2008

 
spacer For the Summer semester 2008, the schedule of the monthly meetings and invited presentations at OpNeAR lab. is the following (Please check again for updates):
 
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Date
Time
Room
Speaker
Presentation Title
8/1 4-5 PM ECSN 4.728 Lakshmi Kannan A Markov Chain Model to Account for Multi-Rate Transmission and Node Cooperative Behavior in IEEE 802.11 Data Link Protocol
 

Presentation Abstracts

spacer August 1, 2008, 4-5 PM, ECSN 4.728

A Markov Chain Model to Account for Multi-Rate Transmission and Node Cooperative Behavior in IEEE 802.11 Data Link Protocol
Speaker: Lakshmi Kannan

The talk would present an analytical model which extends Markov Chain models previously proposed for IEEE 802.11 data link protocol. Unlike already published models, the proposed Markov Chain accounts jointly for the following three factors. First, in addition to collision, it accounts for frames that may be lost due to a low signal-to-noise ratio value at the link receiver (frame corruption). Second, it accounts for the various link transmission rate options which affect both the frame transmission time and probability of frame corruption. Third, it accounts for cooperative protocol variants of the IEEE 802.11 protocol. According to these protocols, a third node (relay) - besides the sender and receiver - may help improve the link capacity. In such a case, the active participation of the relay node must be properly captured by the analytical model. All the above factors are combined into one single Markov Chain model by leveraging a multi-dimensional approach.


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Open Networking Advanced Research Lab
Dept. of Electrical Engineering
The University of Texas at Dallas. USA.