Adaptive multi-rate medium and low speed voice optimization method based on VoLTE bearer

Abstract

The invention discloses an adaptive multi-rate medium and low speed voice optimization method based on a VoLTE bearer, and mainly solves the problems in the prior art that the protocol overhead ratioof the low speed voice frames is high and the wireless resource utilization rate is low. The implementation steps are that 1) an adaptive multi-rate AMR coder generates 20ms low speed voice frames under the low rate coding mode; 2) the low speed voice frames are combined so that a composite voice frame is generated; 3) the composite voice frame is packaged into an IP data packet; 4) header compression is performed on the IP data packet by using a robust header compression ROHC method; 5) a semi-static scheduling period equal to the length of the composite voice frame is configured; and 6) thewireless resource is allocated to the user and semi-static scheduling is activated and then the user uses the resource to receive or transmit the data every semi-static scheduling period. The protocoloverhead ratio can be reduced, the wireless resource utilization rate can be enhanced, the VoLTE user capacity can be increased and the method can be used for the satellite communication system or the low speed voice communication system.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a low-speed voice optimization method, which can be used in actual satellite communication systems or other low-speed voice communication systems. Background technique [0002] Long-term evolution LTE-based voice service VoLTE is an end-to-end voice solution based on IP multimedia subsystem IMS network under all-IP conditions. Compared with traditional IP-based voice service VoIP, the VoLTE architecture is on the LTE network and can Provide better quality of service QoS guarantee. [0003] In order to improve service coverage and system capacity, VoLTE uses the following key technologies: adaptive multi-rate AMR coding scheme, semi-persistent scheduling SPS, robust header compression ROHC, etc. As the VoLTE voice compression coding standard, AMR can optimize the coding type according to the channel transmission conditions, so as to meet the performance requirements u...

AI Technical Summary

Problems solved by technology

[0004] The problem of the prior art is: for the VoLTE service using the low-rate AMR speech coder, even if the ROHC header compression is turned on, the AMR speech frame passes through the RTP layer, UDP layer, IP layer, PDCP layer, The RLC layer and the MAC layer need at least 56 bits of overhead to maintain the normal operation of the protocol, and the proportion of protocol overhead is too large

In addition, the output voice frame load of the low-rate AMR voice encoder is small, which easily causes waste of PRB resources, thus affecting the utilization rate of wireless resources and user capacity

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