Mobility

Multiuser Cognitive Access of Continuous Time Markov Channels: Maximum Throughput and Effective Bandwidth Regions

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Executive Summary

The problem of sharing multiple channels owned by primary users with multiple cognitive users is considered. Each primary user transmits on its dedicated channel, and its occupancy is modeled by a continuous time Markov process. Each cognitive user is capable of sensing one channel at a time and it transmits according to a slotted structure. The transmissions of cognitive users on each channel are subject to a prescribed collision constraint. Under tight collision constraints, the maximum throughput region is obtained by a policy referred to as Orthogonalized Periodic Sensing with Memoryless Access (OPS-MA).

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