Adaptive sensing period based distributed medium access control for cognitive radio networks
2014 (English)In: IEICE transactions on communications, ISSN 0916-8516, E-ISSN 1745-1345, Vol. E97B, no 11, 2502-2511 p.Article in journal (Refereed) Published
In this paper, we propose distributed medium access control (MAC) protocols based on an adaptive sensing period adjustment scheme for low-cost multiple secondary users in interweave-type cognitive radio (CR) networks. The proposed MAC protocols adjust the sensing period of each secondary user based on both primary sensing and secondary data channels in distributed manner. Then, the secondary user with the shortest sensing period accesses the medium using request-to-send (RTS) and clear-to-send (CTS) message exchange. Three components affect the length of each user’s sensing period: sensing channel quality from the primary system, data channel quality to the secondary receiver, and collision probability among multiple secondary transmitters. We propose two sensing period adjustment (SPA) schemes to efficiently improve achievable rate considering the three components, which are logarithmic SPA (LSPA) and exponential SPA (ESPA). We evaluate the performance of the proposed schemes in terms of the achievable rate and other factors affecting it, such as collision probability, false alarm probability, and average sensing period.
Place, publisher, year, edition, pages
2014. Vol. E97B, no 11, 2502-2511 p.
Access control, Adaptive control systems, Cognitive radio
IdentifiersURN: urn:nbn:se:kth:diva-168545DOI: 10.1587/transcom.E97.B.2502ISI: 000359493100027ScopusID: 2-s2.0-84925970465OAI: oai:DiVA.org:kth-168545DiVA: diva2:817940
QC 201506082015-06-082015-06-042015-09-09Bibliographically approved