Abstract:
WiMAX have emerged as a promising wireless broadband access
technology with throughputs comparable to wired DSL connections
(digital subscriber line). Cellular deployment of WiMAX
allows multiple subscriber connections with each base station.
Bandwidth allocation to subscribers follows Demand Assignment
Multiple Access (DAMA) where a subscriber is allocated
the bandwidth based on its request. Performance of WiMAX
deployment significantly depends upon the efficient bandwidth
request and allocation. In this thesis, we investigate the bandwidth
request and grant mechanism of WiMAX using Markov
chain based analytical model. We study the impact of different
parameters on the grant probability of bandwidth requests.
Our analysis shows that grant probability is heavily dependent
upon the probability of bandwidth request transmission without
collision. We conclude that the grant probability can be
improved significantly by reducing the wait time of subscribers
after transmitting the bandwidth request.
