认知无线电网络的伺机频谱接入策略

On cognitive radio networks with opportunistic spectrum access strategies

提出了一种伺机频谱接入策略,用于由移动用户构成的认知无线电网络环境。提出的方案中,将每个可获得的信道划分成由N个时隙构成的TDMA帧,并且为每个激活的认知用户分配一个区别于其他激活用户的时隙。允许节点以一定的接入概率充分利用分配给其他激活用户的时隙进行通信。评估了提出的伺机频谱共享策略对系统吞吐量和能耗性能的影响。

In this paper, it presented an opportunistic spectrum access approach for cognitive radio network, which is collection of mobile nodes. In the proposed approach, for each available channel, TDMA frame was consisted of N time slots, and each active cognitive user was assigned one transmission slot different from those of other active cognitive users in each frame. Furthermore, It allowed an active cognitive user utilized the slots pre-assigned to the other active cognitive users under a range of values for accessing opportunity. The paper evaluated the performances of the opportunistic spectrum access approach in view of system throughput and energy efficiency.