Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2013, Vol. 36 ›› Issue (6): 37-40.doi: 10.13190/j.jbupt.2013.06.008

• Papers • Previous Articles     Next Articles

An Optimal Channel Assignment in Hybrid Network Based on Cognitive Radio

LIAO Yong1,2, YANG Shi-zhong1, WEI Hai-bo1, WANG Dan1   

  1. 1. Key Laboratory of Aerocraft Tracking Telemetering and Command and Communication (Chongqing University), Ministry of Education, Chongqing 400044, China;
    2. State Key Laboratory of Integrated Services Networks, Xidian University, Xi'an 710071, China
  • Received:2013-03-28 Online:2013-12-31 Published:2013-10-08

Abstract:

A solution is put forward that makes access point (AP) access into the primary user's channel in the identity of cognitive user under the precondition of guaranteeing primary user's quality of service, so as to share the channel resource of primary user effectively. It models the channel assignment as an integer linear programming issue and puts forward a hybrid optimal channel assignment algorithm (HOCA). Based on minimum spanning tree algorithm of connected weighted graph, the algorithm can allocate the minimum interfered channel for primary user and cognitive AP fast and efficiently in its own frequency band of primary user and cognitive AP. HOCA algorithm and other two channel assignment algorithms, near-optimal opportunistic channel allocation and near optimal frequency assignment-2 are analyzed. It is testified that HOCA algorithm can effectively improve the throughput of cognitive user.

Key words: channel assignment, interference channel, wireless local area network, cognitive radio, integer linear programming

CLC Number: