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

An adaptive multi-rate, optimization method technology, applied in the field of communication, can solve problems affecting wireless resource utilization and user capacity, large proportion of protocol overhead, waste of PRB resources, etc., to increase the semi-static scheduling period and reduce the proportion of protocol overhead , the effect of reducing the number of scheduling

Inactive Publication Date: 2018-04-06
XIDIAN UNIV
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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

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

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[0024] The implementation steps and effects of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] The low-rate coding modes include narrowband adaptive multi-rate AMR-NB coding mode 0, mode 1, mode 2 and mode 3, and the coding rates are 4.75kbps, 5.15kbps, 5.9kbps and 6.7kbps respectively.

[0026] The embodiment of the present invention assumes that the AMR-NB low-speed speech coder of 4.75kbps is used to generate the low-speed speech frame of 20ms, and the low-speed speech frame of 20ms is optimized with the adaptive multi-rate medium and low-speed speech optimization method of the present invention .

[0027] refer to figure 1 , the implementation steps of the present invention are as follows:

[0028] Step 1, generate 20ms low-speed speech frame.

[0029] (1a) In the call activation stage, the narrowband adaptive multi-rate AMR-NB speech coder samples the input signal at a sampling rate of 8000 samples...

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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...

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Application Information

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IPC IPC(8): G10L19/008G10L19/16H04L29/06H04W28/06H04W72/12
CPCH04L69/04H04W28/06H04W72/1263G10L19/008G10L19/16H04W72/54
Inventor 秦浩李蝉孙圆圆宋彬
Owner XIDIAN UNIV
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