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Issue No. 07 - July (2011 vol. 10)
ISSN: 1536-1233
pp: 1011-1027
Jihoon Park , University of California, Los Angeles, Los Angeles
Przemyslaw Pawelczak , University of California, Los Angeles, Los Angeles
Danijela Čabrić , University of California, Los Angeles, Los Angeles
We present an analytical framework to assess the link layer throughput of multichannel Opportunistic Spectrum Access (OSA) ad hoc networks. Specifically, we focus on analyzing various combinations of collaborative spectrum sensing and Medium Access Control (MAC) protocol abstractions. We decompose collaborative spectrum sensing into layers, parametrize each layer, classify existing solutions, and propose a new protocol called Truncated Time Division Multiple Access (TTDMA) that supports efficient distribution of sensing results in “\kappa out of N” fusion rule. In case of multichannel MAC protocols, we evaluate two main approaches of control channel design with 1) dedicated and 2) hopping channel. We propose to augment these protocols with options of handling secondary user (SU) connections preempted by primary user (PU) by 1) connection buffering until PU departure and 2) connection switching to a vacant PU channel. By comparing and optimizing different design combinations, we show that 1) it is generally better to buffer preempted SU connections than to switch them to PU vacant channels and 2) TTDMA is a promising design option for collaborative spectrum sensing process when \kappa does not change over time.
Opportunistic spectrum access, cognitive radio, ad hoc networks, medium access control, spectrum sensing.

D. Čabrić, P. Pawelczak and J. Park, "Performance of Joint Spectrum Sensing and MAC Algorithms for Multichannel Opportunistic Spectrum Access Ad Hoc Networks," in IEEE Transactions on Mobile Computing, vol. 10, no. , pp. 1011-1027, 2010.
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