3GPP LTE系统中无线视频传输调度算法研究  

Research on Scheduling for Wireless Video Communication in 3GPP LTE Systems

作　　者：王冉冉[1] 宋建新[1] 

机构地区：[1]南京邮电大学图像处理与图像通信实验室,江苏南京210003

出　　处：《电视技术》2013年第3期118-121,128,共5页Video Engineering

摘　　要：针对3GPP LTE系统,提出了适用于下行链路视频业务的一种新的分组调度算法,即时延优先比例公平调度。当需要做出调度决策时,该算法利用每个用户的数据包时延信息和瞬时下行信道条件,在满足用户QoS前提下最大限度地提高系统吞吐量。同时,当用户选择资源块(RB)进行传输后,即从用户集合中将该用户删除,避免接近eNodeB的用户一直占用无线资源,确保了资源分配的公平性。实验仿真结果表明,该算法在丢包率和PSNR性能上优于最大权重时延优先(M-LWDF)算法,在保证用户间公平性前提下,满足了视频业务的QoS要求。A new packet scheduling algorithm for video traffic in downlink third generation partnership project long term evolution （3GPP LTE） system is proposed in this paper, namely Delay First-Proportional Fair Scheduling（DF-PFS）. The proposed algorithm utilizes each user＇s packet delay informa- tion and its instantaneous downlink channel conditions when making scheduling decisions. After scheduling one user, it will be deleted from the uer set,＂ which ensures fairness during resource allocation. Simulation results show that the proposed algorithm outperforms maximum-largest weighted delay first algorithm by satisfying the QoS requirements of the video traffic and ensuring fairness among users.

关 键 词：3GPP LTE 时延优先比例公平调度 分组调度 服务质量 视频业务 

分 类 号：TN919.85[电子电信—通信与信息系统]