Simultaneous Wireless Transfer of Power and Information in a Decode-and-Forward Two-Way Relaying Network
Simultaneous Wireless Transfer of Power and Information in a Decode-and-Forward Two-Way Relaying Network
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DOI：
10.1109/twc.2017.2648801
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发表时间：
2017-03-01
影响因子：
10.4
通讯作者：
Kim, Yun Hee
中科院分区：
文献类型：
--
作者：
Thinh Phu Do;Song, Iickho;Kim, Yun Hee
我们考虑在双向中继网络中同时无线传输信息和电力，其中解码转发协议用于两个源设备之间以不同速率进行数据交换。数据交换在两个时间阶段 (TP) 中完成，TP 比率可能不对称，其中中继由第一阶段的源设备通过功率分配 (PS) 或时间切换 (TS) 同步无线信息和功率传输 (SWIPT) 供电。在网络方面，研究了基于PS的SWIPT的PS和TP比率的资源分配以及基于TS的SWIPT的TS和TP比率的资源分配，以最小化系统中断概率。我们首先用瞬时信道状态信息解决每种情况的联合优化问题，然后利用一个或两个TP比率值提出次优方案以降低实现复杂度。分析和仿真结果表明，所提出的方案优于同等资源分配的基准方案，并且随着数据交换速率或中继位置变得更加不对称，增益变得更加突出。
We consider a simultaneous wireless transfer of information and power in a two-way relaying network, where a decode-and-forward protocol is employed for data exchange between two source devices at different rates. The data exchange is accomplished in two time phases (TPs) with possibly asymmetric TP ratios, where the relay is powered by the source devices in the first phase through simultaneous wireless information and power transfer (SWIPT) either by power splitting (PS) or by time switching (TS). For the network, resource allocation of the PS and TP ratios for the PS-based SWIPT and that of the TS and TP ratios for the TS-based SWIPT are studied to minimize the system outage probability. We first solve the joint optimization problem of each case with the instantaneous channel state information and then propose suboptimal schemes utilizing one or two values for the TP ratio to lower the implementation complexity. The results from analysis and simulation show that the proposed schemes outperform the benchmark scheme with equal resource allocation and that the gain gets more prominent as the rates of the data exchanged or the relay locations become more asymmetric.