基于加权协商对策论异构网络快速无线传输的速率分配算法

摘要

本文研究异构无线网络合作传输的速率分配问题.作为合作传输的理性参与者,异构网络可通过反复协商得到彼此都满意的最优分配方案,即协商对策.因此,本文在速率需求和可用带宽这两个约束条件下,考虑网络传输能力的异构性,用加权协商对策论对异构网络合作传输的速率分配进行了数学建模;以最小传输时间作为优化目标构造了效用函数,证明了该函数是一个凸函数,并利用拉格朗日乘数法推导出最优显式解;提出了一种在终端上可实现的速率分配算法,进行了性能仿真实验.本文算法特别适合于应急通信等快速传输场景.%Collaborative transmission is an efficient solution to high-speed wireless communication and the question of rate allocation arises as how to divide the traffic flow among networks. As the players in collaborative transmission,heterogeneous networks would like choose collectively an outcome in the negotiating method to benefit all the individuals, which is a progress of bargaining . Then the static rate allocation over networks is formulated as a weighted bargaining game framework, where the heterogeneity of the transmission capabilities of different networks is taken into account. With the minimized transmission time as the optimal objective, the utility function is proved to be convex and the closed Nash bargaining solution is derived with the Lagrange multipliers method.Moreover,an algorithm is presented to realize rate allocation in the multi-mode device. Simulation results demonstrate that the proposed method is more efficient with the least transmission time and suitable for the emergency communication scenario.