Freeswitch-based high-performance media forwarding method and device

Abstract

The invention provides a freeswitch-based high-performance media forwarding method. The method comprises the following steps that a source sends an RTP message to a freeswitch; the freeswitch caches the received RTP message to a jitterbuffer; meanwhile, the freeswitch modifies a message header of the RTP message and forwards the modified RTP message to each corresponding target device; each target device receives the RTP message and detects whether the RTP message has packet loss, and if the packet loss is detected, the lost RTP message is obtained from the jitterbuffer of the freeswitch again; and if no packet loss exists, the forwarding of the RTP message is ended. The method and the device have the advantages that the running efficiency of the freeswitch can be improved, the forwarding processing efficiency of the freeswitch about the message is improved, and the packet loss resistance of a network can be effectively enhanced.

Description

technical field [0001] The invention relates to the field of communication equipment, in particular to a high-performance media forwarding method and device based on freeswitch. Background technique [0002] Freeswitch is an open source SIP server, which has good scalability, supports multiple encodings and supports RTP / RTCP protocol very well. Freeswitch supports the jitterbuffer mechanism, and the NACK packet loss compensation function can be realized on the jitterbuffer mechanism. Freeswitch also provides a zero-copy mechanism for packets, which can achieve certain high-efficiency packet forwarding. [0003] At present, the mainstream streaming media technology is the RTP / RTCP protocol, and there is a supplementary protocol in the RTP / RTCP protocol, which is the NACK packet loss compensation technology. According to the content of the RTCP packet of the NACK, a certain packet loss compensation function can be achieved. [0004] Under the existing freeswitch framework, ...

AI Technical Summary

Problems solved by technology

[0004] Under the existing freeswitch framework, although there is support for jitterbuffer and NACK packet loss compensation, the session uses a one-to-one mechanism, and each session needs to maintain a unique jitterbuffer, which leads to 5000 sessions. 5000 jitterbuffers need to be maintained

Once the jitterbuffer cache is large, it will cause the program to occupy too much memory, which will cause the device to need more resources to run freeswitch

This also makes Freeswitch no longer operate at high performance when a certain number of sessions are reached, and Freeswitch has to modify the RTP content of each session. In some pure forwarding environments, these modifications will also lead to performance degradation.

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