Research of Congestion Control Mechanisms Based on QoS Negotiation in Multimedia Communications
Congestion control in Internet out of TCP by additive increase and multiplicative decrease (AIMD) fails to satisfy the need for multimedia communications. To meet the need of multimedia communications in Internet in desirable quality of service (QoS), a fresh congestion control mechanism based on QoS negotiation was forwarded in support of multimedia communications, with detailed research of its operation principle and approaches, followed by sufficient programming tests concerning establishment of systematic end-to-end multimedia communications, to conclude that the suggested model offered desirable congestion control in multimedia communications and also satisfied need for QoS in various bandwidths of multimedia communications. The research succeeded in development of such empirical multimedia communications system in Internet as end-to-end IP videophone and video conference, both of which are under way to wide application.