基于势力场博弈的无线网络视频流速率控制模型

Wireless Network Video Stream Rate Control Model Based on Potential Game

多媒体通信中如何对视频流量速率进行高效公平分配是提升无线网络性能的重要手段。应用势力场博弈模型来研究无线网络视频流速率分配机制,根据视频流特性建立了基于流量信噪比和流量速率为参数的势力场效用函数,提出了基于势力场博弈的无线网络视频流速率控制模型。证明了模型的纳什均衡存在性及唯一性,并提出了势力场博弈模型纳什均衡的分布式求解算法。数值仿真验证了势力场博弈的纳什均衡存在性,仿真结果表明了提出的模型能保证不同视频流量间公平的速率分配,且由于提出的算法执行方式是分布式的,能有效减轻网络的负载。

Efficent and fair rate allocation for video stream is the important measure to upgrade the wireless network performance in multimedia communication. In this paper, a wireless network video stream rate control model and algorithm based on potential game is proposed. The utility function on PSNR and flow rate is constructed according to the video stream characteristic, thus the wireless network video stream rate control based on potential game is proposed. The existence and uniqueness of the proposed model＇s Nash equilibrium is proved theoretically and a distributed algorithm to obtain Nash equihbrium is proposed. Numerical simulation shows the proposed model can ensures different video stream fair rate allocation, and it can lessen the network load efficiently.