Alternating Renewal Theory-based MAC Protocol for Cognitive Radio Networks
نویسندگان
چکیده
We propose a MAC protocol for cognitive radioenabled secondary networks, which opportunistically use the channels of CSMA/CA-based primary network. We have considered IEEE 802.11 WLAN as a de facto primary network in ISM band. Our study focuses on a single WLAN channel that is used by a WLAN client and server for HTTP-based web browsing application. We use the theory of alternating renewal processes to model the occupancy of channel by WLAN nodes. This model is used by a pair of secondary nodes for estimating idle time durations on the channel and opportunistically transmit frames during the estimated idle times to maximize channel throughput without significantly degrading the WLAN and web application performance.
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