关键词: 异构网络, 视频特性, 纳什均衡, 裁决评价矩阵, 效益函数, 最佳分配带宽

Abstract: In order to solve the problems such as difficult to achieve balance transmission, and the video quality is difficult to meet the needs of user in network video transmission under the conditions of heterogeneous network environment, this paper proposes the Nash equilibrium optimization mechanism of network video data based on feature selection and heterogeneous network bandwidth selection. Firstly, the dynamic evaluation of the network state is conducted to select the appropriate network for transmission by defining the evaluation matrix to calculate the parameters weight vector and selecting the parameters based on the current user video data. Then Nash equilibrium solution is obtained by using the Nash equilibrium optimization mechanism to construct the benefit function and iterative algorithm. The simulation results show that the proposed mechanism can effectively reduce the error level of user??s video experience and improve the user PSNR (peak signal to noise ratio), as well as increasing the efficiency of the network when the user??s video characteristic and network are heterogeneous compared with the BRA-PMEM (bandwidth resource allocation mechanism in pure market economy model).

Key words: heterogeneous network, video characteristics, Nash equilibrium, ruling evaluation matrix, benefit function, optimal allocation bandwidth