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Method and system for improving LAA uplink transmission performance

A technology of transmission performance and transmission resources, which is applied in the field of improving LAA uplink transmission performance, can solve unspecified problems, and achieve the effects of ensuring full utilization, friendly coexistence, and reducing detection conflicts

Inactive Publication Date: 2017-05-10
CHINA TELECOM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, whether the base station or the terminal performs LBT in the uplink, and which LBT scheme to use is not clear

Method used

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  • Method and system for improving LAA uplink transmission performance
  • Method and system for improving LAA uplink transmission performance
  • Method and system for improving LAA uplink transmission performance

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Embodiment Construction

[0028] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are illustrated.

[0029] figure 1 A flow chart showing a method for improving LAA uplink transmission performance according to an embodiment of the present invention, such as figure 1 As shown, the method mainly includes:

[0030] Step 100, when performing uplink transmission, the user terminal sends an uplink scheduling request (SR) and a buffer status report (BSR) to the base station.

[0031] Step 102, the base station selects the corresponding unlicensed carrier according to the cache status report sent by the user terminal, the load of all current carriers and the interference of the unlicensed carrier, and sends a UL grant (uplink scheduling grant) message to the user terminal, in the UL grant message Including the indication information of the unlicensed carrier used by the user terminal for uplink transmis...

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Abstract

The invention discloses a method and system for improving the LAA uplink transmission performance. The method comprises the steps: transmitting an uplink scheduling request and a caching state report to a base station when a user terminal carries out the uplink transmission; enabling the base station to select a corresponding unauthorized carrier according to the caching state report transmitted by the user terminal, all current carrier load conditions and unauthorized carrier interference conditions, transmitting an uplink scheduling authorization UL grant message to the user terminal, wherein the UL grant message comprises unauthorized carrier indication information used by the uplink transmission of the user terminal, and uplink transmission resource distribution information; carrying out the spare channel assessment of the unauthorized carrier indicated by the UL grant message after the user terminal receives the UL grant message; enabling the user terminal to carry out the uplink transmission on the uplink transmission resource of an unauthorized carrier indicated by the UL grant message at a specific moment if the unauthorized carrier channel indicated by the UL grant message is spare and available. The method improves the uplink access probability of the terminal, reduces the CCA detection conflict among the terminals of a local cell, and makes the most of uplink scheduling resources.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a method and system for improving LAA uplink transmission performance. Background technique [0002] With the rapid development of the mobile Internet and the widespread popularization of smart terminals, the surge in data traffic has doubled the pressure on existing network capacity. In order to solve the problem of mobile network capacity, on the one hand, it is necessary to improve the utilization rate of existing spectrum through technological innovation, and on the other hand, it is necessary to seek more spectrum resources. [0003] At present, the LAA (License Assisted Access) technology that 3GPP focuses on in Release 13 is one of the key technologies to solve the problem of LTE network expansion by using unlicensed spectrum. This technology can be realized with the assistance of licensed spectrum, through The method of carrier aggregation deploys LTE in the u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W72/12
CPCH04W72/1268H04W72/21
Inventor 鲁娜谢伟良杨峰义毕奇
Owner CHINA TELECOM CORP LTD
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