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Voice bandwidth pre-distribution method and device

A technology of bandwidth allocation and pre-allocation, applied in voice analysis, using the return channel for error prevention/detection, instruments, etc., can solve problems affecting the overall throughput of the communication system, reducing the efficiency of wireless resource usage, and affecting the quality of calls in the downlink direction, etc. , to avoid voice call quality degradation, ensure voice call quality, and reduce voice packet loss rate

Inactive Publication Date: 2015-06-03
BEIJING XINWEI TELECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can meet the user's voice bandwidth requirements in real time to a certain extent, it will reduce the use efficiency of wireless resources and easily affect the overall throughput of the communication system.
In addition, other existing voice resource allocation methods usually do not consider factors in both uplink and downlink directions at the same time, resulting in waste of resources in one direction when the channel quality is good
For example, assuming that the quality of the uplink channel is good and the quality of the downlink channel is poor, it may happen that although the base station has resources to retransmit, the terminal does not provide voice packet reception status feedback, resulting in the base station being unable to perform effective retransmission based on the reception status feedback result , resulting in a serious waste of downlink resources and affecting the call quality in the downlink direction

Method used

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  • Voice bandwidth pre-distribution method and device
  • Voice bandwidth pre-distribution method and device
  • Voice bandwidth pre-distribution method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: The situation where the quality of the two-way channel deteriorates

[0029] The voice service of this embodiment adopts the G729A compression mode, that is, the PCM of 10 ms per frame is compressed into 80-bit voice packets. Since some necessary information needs to be added to the voice packet during transmission, the minimum voice bandwidth value for each frame transmission is taken as 106 bits / frame.

[0030] Assuming that the current uplink and downlink are both in the two-code channel mode, the implementation steps of the voice bandwidth pre-allocation method include:

[0031] Step 1: Periodically detect the length of the voice transmission buffer, and perform bandwidth pre-allocation according to the detection result.

[0032] 1(a), downlink transmission buffer length cycle detection and bandwidth pre-allocation: the base station side detects the number of voice packets to be sent in the base station transmission window every 20 frames (including t...

Embodiment 2

[0046] Embodiment 2: The situation where the quality of the two-way channel becomes better

[0047] In this embodiment, on the basis of Embodiment 1, it is assumed that both uplink and downlink are currently in a multi-code channel mode, and the bidirectional channel quality becomes better. Then the implementation steps of the voice bandwidth pre-allocation method include:

[0048] Step 1: Periodically detect the length of the voice transmission buffer, and perform bandwidth pre-allocation according to the detection result.

[0049] 1(a), downlink sending buffer length cycle detection and bandwidth pre-allocation: when the downlink channel quality becomes better, the downlink voice packet loss is less, and the number of voice packets to be sent in the sending window cache decreases, when JB1 dl ≤3, bwReq1 dl =106, that is, the downlink request bandwidth value is 106 bits / frame.

[0050] 1(b), uplink send buffer length cycle detection and bandwidth pre-allocation: when the u...

Embodiment 3

[0063] Embodiment 3: The situation where the channel quality in one direction is good

[0064] In this embodiment, on the basis of Embodiment 1, it is assumed that both the uplink and downlink are currently in the multi-code channel mode, the quality of the downlink channel is good, and the two-code channel condition is met, but the quality of the uplink channel is poor, and the received block error statistics are greater than the bandwidth error block threshold. . The downlink pre-allocated bandwidth is 106 bits / frame after the first integration, and the uplink pre-allocated bandwidth is greater than or equal to 212 bits / frame after the first integration. In the second integration, it is necessary to force the downlink bandwidth request value to be 212 bits / frame, so as to support feedback on uplink receiving conditions and further ensure the quality of uplink voice transmission.

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Abstract

The invention provides a voice bandwidth pre-distribution method. Both the uplink and the downlink support a two-code-channel mode and a multi-code-channel mode. The method comprises the following steps that a, the uplink and downlink sending cache length is periodically detected, and the uplink and downlink bandwidth pre-distribution is carried out; b, the uplink and downlink bandwidth pre-distribution based on code channel mode conversion is carried out according to the uplink and downlink receiving error block statistic value and the current bandwidth distribution value; c, a greater value in the pre-distribution results of the step a and the step b is respectively selected for the uplink and the downlink to be used as the pre-distribution value; if the pre-distribution value in the single direction equals to the minimum voice bandwidth value, in addition, the pre-distribution value in the reverse direction is greater than or equal to the twice of the minimum voice bandwidth value, and the single-direction pre-distribution value is forced to be the twice of the minimum voice bandwidth value; when the pre-distribution value is different from the current bandwidth distribution value, the bandwidth re-distribution is triggered. The invention also provides a voice bandwidth pre-distribution device. The single-direction resource waste can be avoided, the voice bandwidth can be fast improved, and in addition, the voice quality reduction due to frequent entering and quilting from the two-code-channel mode can be avoided.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a voice bandwidth pre-allocation method and device. Background technique [0002] Voice services have always occupied a very important position in the development of mobile communications, and voice quality is the focus of major operators. Since real-time voice transmission generally uses a protocol that does not guarantee reliable transmission to transmit voice packets to improve the real-time performance of transmission, voice packets may be lost due to network congestion or transmission damage. When the data packet loss rate is large, it makes The voice heard by the user is incoherent or even interrupted, which cannot provide quality assurance for real-time voice services. Therefore, in voice calls, in order to provide satisfactory services for as many users as possible, the system must have the function of reasonably allocating resources according to channel quality and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04L1/16G10L19/008
CPCH04L1/1671G10L19/008H04W72/52
Inventor 丁雅帅马强黄其华余西西
Owner BEIJING XINWEI TELECOM TECH
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