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Method for adapting radio link in network

A wireless link and network technology, applied in the direction of transmission modification based on link quality, network topology, wireless communication, etc., can solve problems such as difficulties in the evaluation process of wireless links

Inactive Publication Date: 2007-11-14
INTERDIGITAL CE PATENT HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes the wireless link assessment process more difficult

Method used

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  • Method for adapting radio link in network
  • Method for adapting radio link in network
  • Method for adapting radio link in network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The first embodiment mainly focuses on the evaluation of the radio link when the effective antenna elements of the space diversity antenna or the consecutive antenna sectors of the receiving terminal are changed. The second embodiment also involves a change of the physical pattern, either alone or also of the antenna elements. Other parameters may of course also be varied (eg AGC gain, frequency offset...), and the invention is not limited to the parameters described.

[0028] The basis of this embodiment is a network compatible with IEEE802.11 and its various changes. More information can be obtained from IEEE.

[0029] Hereinafter, a terminal that starts the evaluation process is called a "receiver" terminal or a "probe" terminal, and a terminal that is requested to send data is called a "transmitting" terminal or a "probe" terminal.

[0030] IEEE802.11 provides a medium access mechanism called "virtual carrier sense" (as opposed to physical carrier sense), which is...

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Abstract

The invention concerns a method for radio link adaptation suitable for use in a communication network with a contention-based medium access mechanism such as CSMA / CA, said network comprising at least a first terminal and a second terminal, characterized by the steps, for testing the reception by the first terminal (MT1) of data sent by the second terminal (MT2) of: setting of a parameter value having an influence on the transmission from the second terminal to the first terminal (e.g. to influence the data rate or the antenna characteristics), generation by the first terminal (MT1) of a message to the second terminal (MT2) for triggering a predetermined response from the second terminal to the first terminal, wherein the predetermined response has a content known in advance to the first terminal and is received at a time known in advance by the first terminal and wherein the predetermined response is received according to conditions defined by the previously set parameter value; evaluation by the first terminal of a quality criterion of the predetermined response.

Description

technical field [0001] The present invention relates to a method for testing and modifying parameters of a wireless link in a network such as an incoming IEEE802.11 network using a contention-based medium access mechanism. Background technique [0002] In a wireless network, two devices communicating over a wireless link need to dynamically configure their transmission parameters. These parameters may specifically include: effective antenna segments or units of the transmitter in the case of multi-segment antennas. Another parameter that can be considered is the physical mode, which includes the choice of channel coding and the choice of modulation. [0003] Selecting proper parameters directly affects the stability and overall performance of the wireless link. [0004] European Patent Application No. 01402592.8, filed on 10.10.2001 in the name of Thomson Licensing S.A., entitled "Method and apparatus for wireless link adaptation", describes A method and device for evalua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/28H04L12/24H04L12/26H04B7/26H04B17/00H04L1/00H04L1/16H04L1/20H04L12/56H04L29/08H04W24/06H04W28/18H04W74/08H04W84/12
CPCH04L1/20H04L1/0001H04L1/16H04W28/18H04W24/06H04W74/0816H04W84/12H04L1/0083H04L12/413H04W74/08
Inventor 雷诺·多尔卢多维克·让娜帕特里克·方丹帕特里克·洛佩斯
Owner INTERDIGITAL CE PATENT HLDG