A Joint Resource Allocation Scheme for Multiuser Two-Way Relay Networks
A Joint Resource Allocation Scheme for Multiuser Two-Way Relay Networks
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DOI：
10.1109/tcomm.2011.071111.100199
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发表时间：
2011-07
影响因子：
8.3
通讯作者：
G. A. S. Sidhu;F. Gao;Wen Chen;A. Nallanathan
中科院分区：
文献类型：
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作者：
G. A. S. Sidhu;F. Gao;Wen Chen;A. Nallanathan
在这封信中，我们研究了在正交频分多址（OFDMA）调制下基于放大转发（AF）的多用户双向中继网络中的资源分配问题。我们提出了一个在单个用户和中继的功率受限的情况下端到端吞吐量最大化问题。优化目标是找到每个用户的最佳子载波分配，中继的子载波配对，以及所有节点的功率分配，这是一个混合整数规划问题。然后，我们通过拉格朗日的对偶分解方法得到一个渐近最优的解决方案，并进一步设计一个次优算法，以换取计算复杂度的性能。最后，仿真结果证明了所提出的算法的性能增益。
In this letter, we study the problem of resource allocation in amplify-and-forward (AF) based multiuser two-way relay network that is operated under orthogonal frequency division multiple access (OFDMA) modulation. We formulate an end-to-end throughput maximization problem subject to limited power constraint at individual user and relay. The optimization targets to find the best sub-carrier allocation to each user, sub-carrier pairing at the relay, as well as the power allocation at all nodes, which turns out to be a mixed integer programming problem. We then derive an asymptotically optimal solution through Lagrange dual decomposition approach and further design a suboptimal algorithm to trade the performance for computational complexity. Finally, simulation results are provided to demonstrate the performance gain of the proposed algorithms.