Performance analysis of IEEE 802.11 cognitive radio ad hoc networks

Changchun Xu, Jianhua He

Research output: Chapter in Book/Published conference outputConference publication


IEEE 802.11 standard is the dominant technology for wireless local area networks (WLANs). In the last two decades, the Distributed coordination function (DCF) of IEEE 802.11 standard has become the one of the most important media access control (MAC) protocols for mobile ad hoc networks (MANETs). The DCF protocol can also be combined with cognitive radio, thus the IEEE 802.11 cognitive radio ad hoc networks (CRAHNs) come into being. There were several literatures which focus on the modeling of IEEE 802.11 CRAHNs, however, there is still no thorough and scalable analytical models for IEEE 802.11 CRAHNs whose cognitive node (i.e., secondary user, SU) has spectrum sensing and possible channel silence process before the MAC contention process. This paper develops a unified analytical model for IEEE 802.11 CRAHNs for comprehensive MAC layer queuing analysis. In the proposed model, the SUs are modeled by a hyper generalized 2D Markov chain model with an M/G/1/K model while the primary users (PUs) are modeled by a generalized 2D Markov chain and an M/G/1/K model. The performance evaluation results show that the quality-of-service (QoS) of both the PUs and SUs can be statistically guaranteed with the suitable settings of duration of channel sensing and silence phase in the case of under loading.

Original languageEnglish
Title of host publication2015 IEEE/CIC International Conference on Communications in China (ICCC)
Number of pages6
ISBN (Print)978-1-5090-0243-6
Publication statusPublished - 7 Apr 2016
EventIEEE/CIC International Conference on Communications in China - Shenzhen, China
Duration: 2 Nov 20155 Nov 2015


ConferenceIEEE/CIC International Conference on Communications in China
Abbreviated titleICCC 2015

Bibliographical note



  • 802.11DCF
  • cognitive radio
  • hyper generalized Markov chain model
  • M/G/1/K queuing model


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