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针对宽带电力线资源分配中的Qo S需求保证及用户间公平性问题,提出了一种计及接入控制策略的宽带电力线OFDM系统跨层资源分配算法。首先建立了多用户跨层资源分配系统模型;其次通过公平因子约束实现整体算法的公平性,并提出一种接入控制策略,在某一个或几个用户信道质量较差而需要消耗大量系统资源的情况下,通过拒绝这些用户的接入来保证系统的整体性能;最后,在典型电力线信道的环境下,对该算法及对比算法进行了仿真,仿真结果证明所提算法相对于对比算法可以更有效地满足Qo S及公平性需求,提升系统性能。
Aiming at the Qo S requirement guarantee and the fairness among users in the broadband power line resource allocation, a cross-layer resource allocation algorithm for broadband power line OFDM system considering access control strategy is proposed. First, a multi-user cross-layer resource allocation system model is established. Second, the fairness of the whole algorithm is achieved by using the fairness factor constraint and an access control strategy is proposed. When one or several users have poor channel quality and consume a large amount of system resources , The system’s overall performance is guaranteed by denying access to these users. Finally, the algorithm and the comparison algorithm are simulated under the typical power line channel environment. The simulation results show that the proposed algorithm can be more efficient than the comparative algorithm Effectively meet the Qo S and fairness needs, improve system performance.