Improving TCP Performance of DOCSIS Based Broadband Networks

摘要

Data-Over-Cable Service Interface Specifications (DOCSIS) is developed for data transmissions over cable networks; it is intended to support IP flows with significantly higher data rate links for high quality data, audio, video and interactive services. It is important to provide traffic scheduling mechanisms to support Quality of Service (QoS) for such applications. This study analyses the TCP performance over DOCSIS protocol in HFC broadband networks and also proposes an algorithm to improve the TCP performance. Simulations were in done in ns-2 with simple modification in MAC layer. The result proves that the proposed algorithm have less access delay, good throughput and good channel utilization when compared existing DOCSIS protocol.