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
Third, it accounts for cooperative protocol variants of the IEEE 802.11
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.