一种适合数字电视上行信道的资源分配方法  

Novel Resource Allocation Strategy for TV Broadcast Uplink System

作　　者：李青[1] 何大治[1] 管云峰[1] 殷惠清[2] 

机构地区：[1]上海交通大学,上海200140 [2]数字电视国家工程研究中心,上海200125

出　　处：《电视技术》2015年第11期94-98,共5页Video Engineering

基　　金：国家自然科学基金项目(61420106008);"111"引智计划项目(B07022);国家"863"计划项目(2012AA011701;2013AA013503);上海交通大学科技创新基金项目(AF0300021)

摘　　要：上行回传技术是下一代数字电视广播系统需要考虑的关键技术点之一,如何合理分配使用白频谱资源是研究重点。为了解决大量用户同时接入时资源需要被快速分配的问题,在研究分析已有工作的前提下,提出一种基于内容的资源分配方案。这种方案的特点在于兼顾公平与效率,且可以快速完成资源分配,在很短的时延内完成使大量用户接入系统。同时,分析了用户行为、广播内容与接入用户数三者的关系,通过分析三者之间的联系与制衡因素,动态修改资源分配参数。通过与其他算法对比,所提出的资源分配方法在公平性、有效性和基于内容的灵活性方面,更加适合大量用户同时接入的场景。Interactive technology is one of the key technologies in next-generation digital television broadcast system.A well designed uplink channel needs to be considered.The focus of research is how to use white space in a broadcast system and allocate the time and frequency resources in a proper way.To find an efficient resource allocation algorithm,the existence work is analyzed and a newly resource allocation method based on the broadcasting content is proposed.The feature of proposed resource allocation method is that,it makes a compromise between fairness and efficiency.Besides,this method can be done very quickly thus a quantity of users can access the system with little time delay.Another feature is the parameter of resource allocation method can be adjusted based on the broadcasting content.Users＇ behavior and reaction are other users＇ responses.A model is established and the users＇access probabilityis described.Using this probability model,the parameter dynamically can be changed.Compared with other resource allocation methods,the proposed method is more suitable for the situation when a large number of users in terms of fairness,efficiency and flexibility based on content.

关 键 词：数字电视 上行 白频谱 资源分配 

分 类 号：TN941[电子电信—信号与信息处理]