Proceedings of the 5th ACM international symposium on Mobile ad hoc networking and computing
A survey on emerging broadband wireless access technologies
Computer Networks: The International Journal of Computer and Telecommunications Networking
Markov chain analysis of uplink subframe in polling-based WiMAX networks
Computer Communications
IEEE/ACM Transactions on Networking (TON)
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We analyze the delay performance of multi-channelMAC in point-to-multipoint wireless networks. We focus on contention based operation of nodes in such networks using a multi-channel MAC protocol adapted from [2]. Our analysis can be extended to IEEE 802.11 DCF in PMP mode of operation and contention based IEEE 802.16 based networks. Using a slotted-time model, we derive expressions for the service time distribution of the packets, and approximate expressions for the queuing delay under Poisson traffic, when the contention window is of fixed size. We extend this analysis to incorporate exponential backoff of the contention window size. We conduct simulations for the multichannelMAC protocol in NS-2, and note that our analytical results match well with simulation results for moderate to high values of traffic intensity. Our analysis enables us to capture the impact of various system parameters on queuing delay.