Multi-Users and Multi-Channels Opportunistic Spectrum Access in Distributed CRN
Dynamic spectrum access is an important issue in cognitive radio systems. It can be done by a base station which can collect spectrum information from the secondary users and allocate the spectrum resource to the secondary users. However, significant overhead may be incurred to exchange information between the base station and secondary users in a common control channel. In this paper, we propose a distributed spectrum sensing and access scheme without information exchange between the secondary users in multi-users and multichannels scenario. Different from the traditional spectrum sensing scheme, the scheme proposed allows a secondary users to sense many channels one by one in a slot .The simulation results show that the proposed scheme can attain a good performance of throughput At the same time, we analyze three channel-sensing orders of the proposed scheme. And then we propose a adaptive sensing and access scheme under different network parameters according to the simulation results.
cognitive radio distributed spectrum access multi-users and multi-channels throughput
Min Neng Qi-hui Wu Yu-hua Xu Guo-ru Ding
Institute of Communications Engineering PLA University of Sci. & Tech Nanjing China
国际会议
秦皇岛
英文
151-154
2010-11-05（万方平台首次上网日期，不代表论文的发表时间）