Multicast Congestion Control Strategy based on Call Admission Control

• Main Authors: Yu-Shun Lo, 羅友舜
• Other Authors: Jenq-Muh Hsu
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/50978700387936967876

碩士 === 國立中正大學 === 通訊工程研究所 === 90 === In Multicast Congestion Control research, “drop-to-zero” is a well-known problem. It means a slower receiver slows down faster receiver in the same multicast group. This is because the sender has to adapt its rate or window size to the slowest path, so that a multicast group performance could be dropped. In this paper, we propose that a call admission control (CAC) scheme manage receivers in multicast group to handle “drop-to-zero” problem and improve multicast performance. For this purpose, we integrate multicast congestion control protocol with CAC scheme and utilize the group member’s network information obtained from multicast congestion control protocol to calculate group reward. The basic idea is two-fold. First, the sender can observe the group performance in accordance with calculated group reward. Second, the sender can decide the permission that receiver ask for to join the multicast group in accordance with group reward. We expect to improve group performance and get better group reward and use simulation to analyze CAC scheme of group performance, member counts and group reward. We will show our CAC scheme can effectively drop slower receivers in multicast group and serve the majority of group receivers. The multicast group can build up the group performance and group reward to resolve “drop-to-zero” problem.