A cognitive MAC protocol for QoS provisioning in overlaying ad hoc networks

Li-Chun Wang*, Anderson Chen, David S.L. Wei

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

30 Scopus citations

Abstract

Cognitive Radio (CR) can effectively reuse the same frequency of the existing legacy systems with the help of the adaptivity provided by the software defined radio technique and the intelligence learned by sensing the huge spectrum in the surrounding environment. One fundamental issue for a CR network is how CR users establish an overlaying ad hoc link on licensed and unlicensed bands. On licensed band, the CR user has to detect the presence of the primary user and vacate accordingly to avoid the interference. On the unlicensed band, the medium access shall support the quality of service (QoS) as well as improving the efficiency and fairness for the spectrum usage. In this paper, by moderately reshaping the legacy carrier sense multiple access (CSMA) medium access control (MAC) protocol, we propose a cognitive and distributive MAC protocol to establish a CR ad hoc network with QoS provisioning, high efficiency and fairness. Through the simulations by NS-2, the proposed cognitive MAC protocol can improve throughput by 50% compared to the legacy carrier sense multiple access with collision avoidance (CSMA/CA) MAC protocol, while keeping the dropping rate less than 2% for delay-sensitive applications.

Original languageEnglish
Title of host publication2007 4th Annual IEEE Consumer Communications and Networking Conference, CCNC 2007
Pages1139-1143
Number of pages5
DOIs
StatePublished - 27 Nov 2007
Event2007 4th Annual IEEE Consumer Communications and Networking Conference, CCNC 2007 - Las Vegas, NV, United States
Duration: 11 Jan 200713 Jan 2007

Publication series

Name2007 4th Annual IEEE Consumer Communications and Networking Conference, CCNC 2007

Conference

Conference2007 4th Annual IEEE Consumer Communications and Networking Conference, CCNC 2007
CountryUnited States
CityLas Vegas, NV
Period11/01/0713/01/07

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