基于能量获取下协作认知网的资源联合分配

Joint resource allocation in cooperative cognitive radio networks based on energy acquisition

频谱共享和能量获取是提高带宽和能量效率的前沿技术,满足了无线传输数据的不断增长的要求。在协作认知无线网络中,由混合接入点提供无线能量的次用户系统帮助主用户传输数据。作为回报,次用户以时分多址的方式获得频谱接入的机会来传输自己的数据。为了最大限度地提高次用户系统的吞吐量,提出了一个次系统吞吐量最优的资源分配方案。在满足主系统基本性能的约束下,根据次用户参与度来选择最佳次用户集合,联合对SUS进行时隙和能量的分配。

Spectrum sharing and energy harvesting are promising techniques to improve the bandwidth and energy efficiencies to meet the ever-growing demand of wireless data transmissions. This paper integrates a wireless powered communication network with a cooperative cognitive radio network, where multiple secondary users（SUs） powered wirelessly by a hybrid access point（HAP） help a primary user relay the data. As a reward for the cooperation, the secondary network gains the spectrum access where SUs transmit to HAP using time division multiple access. To maximize the sum-throughput of SUs, a secondary sum throughput optimal resource allocation scheme is presented. According to SUs＇ participation degree, this scheme chooses the optimal set of relaying SUs and jointly performs the time and energy allocation for SUs under the constraint of meeting target primary rate.