【摘要】 研究基于完备信道和队列状态的最优功率分配策略。通过联合物理层和网络层的模型,建立了系统的跨层模型,进而在此基础上建立了功率分配的跨层优化问题。给出跨层最优功率分配问题的解析最优解和相应的算法,即"地窖注水"算法。说明传统的"注水策略"仅仅是所提出的地窖注水算法在不考虑队列长度下的一个特例。仿真将验证所提出策略相对于传统功率分配策略的性能优势。在同样的数据包到达率下,所提出的功率分配策略可以达到更小的排队时延。更多还原

【Abstract】 The optimal power allocation was investigated when both channel and queue state information was taken into account.By modeling the system from a cross-layer perspective,an optimization problem was formulated on power allo-cation where the maximal power requirement of a user was determined by the number of its backlog packets.The ana-lytical solution as well as its algorithm,which refer to as water filling in cellar(WFIC),were proposed.The proposed WFIC can be reduced to traditional water-filling(TWF) method as a special case where queue state was ignored.Simula-tion results show that the proposed method can achieve lower queuing delay compared to conventional methods.更多还原