Method for converting circuit voice into VOIP voice in satellite mobile communication system

Abstract

The invention discloses a method for converting circuit voice into VOIP voice in a satellite mobile communication system, and belongs to the technical field of satellite mobile communication. According to the method, circuit voice can be transmitted in a satellite mobile communication system, and circuit signaling, short messages and circuit voice transmitted by an air interface can be converted into a standard VOIP format to be transmitted with a standard VOIP process at a core network interface. The method can be applied to a satellite mobile communication system based on an LTE system or a 5G system, a core network and an IP multimedia subsystem are deployed in a gateway station, and a voice conversion function is added on a satellite base station or voice conversion gateway equipment is added in the system. Through a voice conversion function, voice in a satellite mobile communication system can be transmitted in different systems between an air interface and a core network interface.

Description

technical field [0001] The invention belongs to the technical field of satellite mobile communication, in particular to a conversion method from circuit voice to VOIP voice in a satellite mobile communication system. Background technique [0002] At present, the construction of satellite mobile communication system is imminent, and many key technologies need to be broken through. In terms of communication protocols, referring to the mature mobile communication protocol system on the ground is the best way to reduce technical risks and speed up development progress. However, there is a big difference between the satellite mobile communication system and the ground mobile communication system. The air interface resources of the satellite communication system are precious and the transmission delay is large. If the SIP voice format is used in the satellite mobile communication system, since the voice data packet has a small number of bytes, most of the IP voice packets are aux...

AI Technical Summary

Problems solved by technology

However, there is a big difference between the satellite mobile communication system and the ground mobile communication system. The air interface resources of the satellite communication system are precious, and the transmission delay is large.

If the SIP voice format is used in the satellite mobile communication system, due to the small number of voice data packets, most of the IP voice packets are auxiliary information IP headers, which will cause low utilization of channel resources.

In addition, if the VOIP voice flow is used on the air interface of the satellite mobile communication system, the call setup time will be long due to the frequent flow exchange

It can be seen that in order to realize the reference of the satellite mobile communication system to the terrestrial mobile communication system, it is necessary to solve the conversion problem of circuit voice to VOIP voice, but there is no such attempt in the prior art

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