Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2010, Vol. 33 ›› Issue (1): 52-55.doi: 10.13190/jbupt.201001.52.zhaoh

• Papers • Previous Articles     Next Articles

Changeable-Domain Based Random Sensing Policy in Multi-User Opportunistic Spectrum Access

ZHAO Hao;LUO Tao;YUE Guang-xin   

  1. (School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China)
  • Received:2009-07-20 Revised:2009-11-23 Online:2010-02-28 Published:2010-02-28
  • Contact: ZHAO Hao

Abstract:

In distributed multi-user opportunistic spectrum access (OSA) environment, user-synchronization problem is the vital reason for network throughput deteriorating. To resolve this problem, a changeable-domain based sensing policy is proposed. By adopting randomized sensing policy it can weaken user-synchronization. When changing the number of channels which are available for randomized access (i.e. the width of the random domain), the proposed policy can achieve a tradeoff between optimal myopic sensing and user-synchronization avoidance. Simulations show that the policy can achieve higher network throughput compared to the randomized sensing policy over the whole channels.

Key words: opportunistic spectrum access, distributed, user-synchronization, changeable random domain

CLC Number: