一种提高有线电视宽带网数据业务性能的算法  

An Algorithm to Enhance the Performance of Data Service Over CATV Broadband Networks

作　　者：宋军[1] 甘育裕[2] 吴资玉[2] 

机构地区：[1]重庆大学电气工程学院,重庆400044 [2]重庆大学通信工程学院,重庆400044

出　　处：《重庆大学学报（自然科学版）》2002年第12期91-94,共4页Journal of Chongqing University

摘　　要：现代有线电视网正逐步向光纤同轴电缆混合 (hybridfiber coax ,HFC)网发展 ,HFC网以其频带宽和用户覆盖面广等优势成为为家庭用户提供宽带接入的重要手段之一。非对称宽带数据业务 (如高速Web浏览和FTP文件下载等 )是目前有线电视宽带网提供的主要服务 ,其性能的优劣将决定用户对有线电视宽带网的满意度 ,从而影响有线电视宽带网的普及和发展。概述了HFC网上行信道的数据传输机制 ,分析了其对数据业务性能造成的影响 ,对数据业务及其所采用的TCP协议在HFC网络环境中的性能进行了研究 ,并从HFC网上行信道带宽分配算法入手 ,对提高有线电视宽带网数据业务性能的方法进行了研究 ,提出了基于下行数据速率跟踪Emerging CATV networks are evolution to Hybrid Fiber/Coax plants. It is widely believed that the HFC network will play an important role in providing broadband accessing service to subscribers due to it's large excess bandwidth and high penetration to the home. Asymmetry broadband data service is the main service provided in the HFC broadband access networks now. It's performance will determine whether the subscribers be satisfied or not and affect the growth of HFC broadband access networks. The authors outline the mechanism of transmitting data in the upstream channel of the HFC network, and analyze how it affecting the performance of data service. The performance of data service and TCP protocol in HFC network is examined. An optimal scheme of bandwidth allocating algorithm for the upstream channel is proposed to enhance the performance of the data service over these networks.

关 键 词：有线电视宽带网 光纤同轴电缆混合网 数据业务 传输控制协议 带宽分配算法 HFC网 

分 类 号：TN915.62[电子电信—通信与信息系统] TN9[电子电信—信息与通信工程]