A hierarchical tree topology of orthogonal frequency division multiple access ( OFDMA) -based multi-hop cellular network was proposed to reduce energy assumption in resource allocation. The timing of transmitting and receiving for the nodes in odd and even layers is defined. The objective is to reduce the total system transmitting power, and the objective function can be applied in odd and even timeslots. The most important one among the constraints is link proportional fairness. A suboptimal resource allocation scheme was proposed to minimize total system transmitting power with lower computation complexity. Simulation results shown that, compared to traditional resource allocation scheme such as OFDM-TDMA, the proposed scheme reduced total system transmitting power by 1.5 dB while keeping proportional fairness among wireless links.%为在基于正交频分多址接入技术的无线多跳蜂窝网中实现节能型资源分配,将无线多跳蜂窝网描述为树形分层拓扑结构,规定了该结构中的奇数层和偶数层节点在系统奇时隙和偶时隙中的发送-接收关系,建立了可同时适用于奇时隙和偶时隙的基于系统总发射功率的优化目标函数,并确定了包括链路比例公平因子等限制条件.考虑到难以得到实际系统最优解,在尽量减少计算复杂度的前提下,提出了一种次优化分配策略,使系统总发射功率最小化.仿真结果表明,与基于正交频分复用的时分多址接入等传统固定资源分配方法相比,运用本文提出的资源分配策略可使系统的总发射功率减少约1.5 dB,并能保持各条链路的比例公平性.
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