Contention Based Multichannel MAC Protocol for Distributed Cognitive Radio Networks

    Authors

    S. Debroy; S. De;M. Chatterjee

    Comments

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    Abbreviated Journal Title

    IEEE. Trans. Mob. Comput.

    Keywords

    Cognitive radio networks; secondary users; MAC protocol; AD HOC NETWORKS; RESOURCE-ALLOCATION; WIRELESS NETWORKS; SPECTRUM; Computer Science, Information Systems; Telecommunications

    Abstract

    Design of an efficient medium access control protocol is critical for proper functioning of a distributed cognitive radio network and better utilization of the channels not being used by primary users. In this paper, we design a contention based distributed medium access control (MAC) protocol for the secondary users' channel access. The proposed MAC protocol allows collision-free access to the available data channels and eventually their utilization by secondary users, with spectrum sensing part being handled by exclusive sensing nodes. We further introduce the provision of reservation of free channels by secondaries for extended periods to increase utilization without causing harmful interference to primaries. We demonstrate how such extended access to resources can be tuned to provide differential quality of service to the secondary users. The effectiveness of the protocol is evaluated by performing analysis and simulation. We use blocking probability, secondary usage of a secondary user and performance degradation caused to primary incumbents as performance metrics. We obtain the conditions for such extended access and try to gauge the resulting increase in utilization. Under optimal conditions, the proposed scheme enables the secondary network to utilize all available channels. The proposed scheme is shown to outperform the most sophisticated existing MAC schemes for distributed secondary networks.

    Journal Title

    Ieee Transactions on Mobile Computing

    Volume

    13

    Issue/Number

    12

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    2749

    Last Page

    2762

    WOS Identifier

    WOS:000344592900005

    ISSN

    1536-1233

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