【摘要】 将无线OFDMA Ad-hoc网络的最优调度建模为条件受限的联合层资源分配优化模型,基于该模型,该文提出了一个基于启发探索机制的分布式调度算法(DSA)。该算法根据局部子载波信道状态为每一个链路选择子载波,采用随机概率选择机制来保证链路子载波选择的有效性。仿真结果表明:与传统方法相比,该文提出的DSA算法能够取得更好的有效性,通过改变DSA算法的链路子载波选择概率阈值,总体的公平性能够进一步提高。更多还原

【Abstract】 By formulating the optimization of data scheduling in wireless OFDMA Ad-hoc networks as the constrained optimization of joint layer resource allocation,a distributed scheduling algorithm(DSA) with heuristic mechanism is proposed based on the optimization model.The proposed algorithm selects a sub-carrier for each link according to the condition information of local sub-carrier condition while protecting the effectiveness of selecting sub-carrier by the method using stochastic probability.Simulation results show: compared with other conventional methods,the proposed algorithm achieves the better effectiveness and the global fairness is improved by varying the probability threshold of DSA for sub-carrier selection.更多还原