Improved-transmission control protocol-friendly multicast congestion control (TFMCC)-protocol-based communication method

Abstract

The invention discloses an improved-transmission control protocol-friendly multicast congestion control (TFMCC)-protocol-based communication method, which is implemented by the following steps of: every time when a source receives a feedback data packet from a current limiting receiver (CLR), computing end-to-end one-way delay jitter between the source and the CLR according to effective timestamp information in the feedback data packet, and computing a congestion judgment factor by utilizing the delay jitter to judge congestion; and computing a correction factor by utilizing the congestion judgment factor to regulate expected throughput and further regulate a transmission rate. In the method, the transmission rate is regulated by calculating the end-to-end delay jitter between the source and the CLR as a congestion signal, and the end-to-end delay jitter of a TFMCC protocol is effectively controlled, thereby effectively reducing the jitter of the protocol, average end-to-end delay, average end-to-end delay jitter, an average packet loss rate and the like, improving the stability and overall performance of the TFMCC protocol, and making the protocol better serve a multicast protocol and more suitable for the transmission of multimedia services.

Description

technical field [0001] The invention belongs to the technical field of multimedia communication and network transmission, and in particular relates to a communication method based on an improved TFMCC protocol. Background technique [0002] In recent years, multimedia services have grown day by day, and the demand for network bandwidth has also increased significantly, which greatly exceeds the capability of unicast. IP multicast technology thus becomes the key technology to solve this problem, it can effectively utilize network bandwidth and save network resources. However, IP multicast lacks a reliable congestion control mechanism. When the network is congested, it cannot effectively control the congestion. This will cause IP multicast to unfairly occupy bandwidth with IP flow, and even cause the network to be overloaded and paralyzed. As a bottleneck in the development of multicast applications, multicast congestion control has become a hotspot in the field of Internet r...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a communication method based on the improved TFMCC protocol to meet the high requirements for stability in view of the lack of effective control of jitter in the TFMCC protocol and the inability to respond to network congestion in time before packet loss occurs meet the needs of multimedia services, better serve multimedia services, and improve protocol performance

Images