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Method for transmitting real-time data on radio packet communication network

A real-time data, wireless packet technology, applied in wireless communication, transmission system, adjustment of transmission rate, etc., can solve the problems of sound quality degradation, poor system performance, etc., to achieve the effect of improving quality

Inactive Publication Date: 2008-03-05
ALCATEL LUCENT SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that it causes voice quality degradation in such wireless packet communication networks
Sound quality can be guaranteed when a guard suitable for class A bit requirements is used for the entire speech frame, but redundancy due to the high overhead of this guard will result in very poor system performance

Method used

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  • Method for transmitting real-time data on radio packet communication network
  • Method for transmitting real-time data on radio packet communication network
  • Method for transmitting real-time data on radio packet communication network

Examples

Experimental program
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Embodiment Construction

[0027] Figures 1 and 2 have already been described in connection with the prior art.

[0028] Fig. 3 shows an embodiment of a method for transmitting real-time data in a wireless packet communication network according to the present invention. In this embodiment, the real-time data includes compressed speech obtained in the manner described in FIG. 1 . Speech frame 12 includes three bit portions type A, type B and type C. Class A includes the most relevant bits in the speech frame 12 .

[0029] Parallel processing of class A bit parts and groups comprising class B and C bit parts: applying steps 31, 321, 331 and 341 to class A bit parts and applying steps 322, 341 to class B and C bit parts 332 and step 342.

[0030] Step 31 consists in adding a checksum to the class A bits in order to increase the error protection of the highly correlated bit portion. The checksum may correspond to any well-known cyclic redundancy check mechanism. An intermediate data entity 121 is obtai...

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PUM

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Abstract

The present invention relates to a method for transporting real-time data from a transmitter to a receiver on a radio packet communication network, said method comprising the steps of: generating, at said transmitter, real-time data frames, said time real-data frames comprising at least two bit portions; selecting said first bit portion and submitting it to a first modulation and coding scheme providing an error-resistance higher than an error-resistance threshold; selecting said second bit portion and submitting it to a second modulation and coding scheme providing an error-resistance lower than said error-resistance threshold; transmitting a first radio packet transmission unit corresponding to said first bit portion to said receiver; transmitting a second radio packet transmission unit corresponding to said second bit portion to said receiver, said second radio packet transmission unit being different from said first radio packet transmission unit.

Description

technical field [0001] This invention relates to wireless packet communication networks, and more particularly to methods of transmitting real-time data such as compressed voice or compressed video in such networks. Background technique [0002] Wireless packet communication networks such as GPRS (General Packet Data Service) or EDGE (Enhanced Data Rate for GSM Evolution) networks originally conceived for the transmission of pure data have been adapted to transmit real-time services such as voice services. [0003] In a wireless packet communication network, a physical connection is not established during the entire session as in a circuit-oriented wireless communication network such as GSM. In circuit-oriented wireless communication networks, each user is assigned a fixed time slot in each frame. [0004] In contrast, in a wireless packet communication network, a specific medium access mechanism dynamically controls the allocation of resources (ie, time slots in frames and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/35H04L1/00H04L12/56
CPCH04L1/007H04L1/0003H04W88/06H04L1/0009H03M13/35H04L2001/0098H04L1/0083H04W28/04
Inventor 热罗姆·布鲁埃尼古拉·保罗卡里纳·蒂鲁阿尔
Owner ALCATEL LUCENT SAS
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