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基于两跳匹配的OFDMA中继网络联合资源分配算法
引用本文:文 凯,喻昉炜,周斌,张赛龙.基于两跳匹配的OFDMA中继网络联合资源分配算法[J].电视技术,2015,39(15):55-59.
作者姓名:文 凯  喻昉炜  周斌  张赛龙
作者单位:重庆邮电大学 通信新技术应用研究中心,重庆邮电大学 通信新技术应用研究中心,重庆邮电大学 通信新技术应用研究中心,重庆邮电大学 通信新技术应用研究中心
基金项目:重庆市自然科学基金资助项目(CSTC2012jj40054)
摘    要:针对OFDMA中继网络的两跳特性,提出一种基于两跳匹配的中继网络联合资源分配算法。首先根据中继网络的两跳性建立两跳速率匹配模型,然后利用对偶分解理论将中继网络资源分配的主问题分解为:中继选择、子载波分配和功率分配三个主要的子问题并进行联合优化,同时基于中继网络两跳性在子载波分配的过程中考虑两跳子载波配对,以逼近系统最优解。最后为了保证算法的公平性,考虑子载波分配因子约束以优化子载波分配。仿真结果表明:所提算法将中继选择、两跳子载波配对与功率分配联合优化以进一步提升系统吞吐量,同时引入子载波分配因子约束,保证了算法的公平性。

关 键 词:OFDMA中继网络  两跳速率匹配  两跳子载波配对  对偶理论
收稿时间:1/4/2015 12:00:00 AM
修稿时间:2015/2/11 0:00:00

OFDMA relay network joint resource allocate algorithm based on two hop matching
WEN Kai,YU Fang-wei,zhou bing and zhang sai long.OFDMA relay network joint resource allocate algorithm based on two hop matching[J].Tv Engineering,2015,39(15):55-59.
Authors:WEN Kai  YU Fang-wei  zhou bing and zhang sai long
Affiliation:Chongqing University of Posts and Telecommunications: Research Centre for Application of New Communication Technologies,Chongqing University of Posts and Telecommunications: Research Centre for Application of New Communication Technologies,Chongqing University of Posts and Telecommunications: Research Centre for Application of New Communication Technologies,Chongqing University of Posts and Telecommunications: Research Centre for Application of New Communication Technologies
Abstract:According to the two-hop characteristic of relay network, a joint resource allocation algorithm based on two-hop rate matching is proposed in OFDMA relay network. Firstly, we base on the two-hop characteristic of relay network build the equivalent model of the two hop rate matching. Secondly, using the dual theory to decomposition the main question of the resource allocation in the relay network to three mainly sub-questions include the relay selection, the subcarrier allocate and the power allocate, and then joint optimizing this sub-questions, in the sub-question of the subcarrier allocate consider the two hop subcarrier pairing to approach the optimization solution of the system. Simulation results demonstrate that the proposed algorithm which based on the two-hop characteristic of relay network to build the two hop equal model, and then according this model the relay selection the power allocation and the two hop subcarriers pairing problem is formulation as a joint optimization problem to further improve the throughput of the system. In addition the proposed algorithm consider that the constraint of subcarrier allocation to guarantee the fairness of the scheme.
Keywords:OFDMA relay network  Two-hop rate matching  Two-hop subcarriers pairing  Dual theory
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