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Method and apparatus for determining LBT mode and the method for accomplishing LBT mode switching

A mode and mechanism technology, applied in the field of switching between listening and speaking mode, which can solve problems such as unreasonable LBT selection

Active Publication Date: 2017-04-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above problems, the present invention provides a method and device for realizing LBT mode switching, which clearly defines the LBT mode for channel contention access selection, and can avoid related problems caused by unreasonable LBT selection

Method used

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  • Method and apparatus for determining LBT mode and the method for accomplishing LBT mode switching
  • Method and apparatus for determining LBT mode and the method for accomplishing LBT mode switching
  • Method and apparatus for determining LBT mode and the method for accomplishing LBT mode switching

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Embodiment 1

[0414] The LBT mode switching mentioned in the following embodiments can be divided into two types:

[0415] The first category: switching between different LBT mechanisms;

[0416] The second category: switching of different LBT mechanism parameter sets within the same LBT mechanism.

[0417] The LBT mechanism includes: LBT Cat2 mechanism, LBT Cat4 mechanism, and LBT Cat3 mechanism; among them, the LBTCat2 mechanism is the LBT mechanism without random back-off. The LBT mechanism without random back-off can be divided into: LBT Cat2 that performs CCA only once during channel contention access and enhanced LBT Cat2 that performs multiple CCAs during channel contention access. The duration of CCA in the LBT Cat2 mechanism can be 34us, 25us, 20us, 16us, 9us or 4us. The duration of CCA can be predefined, indicated by the base station, notified by RRC signaling, determined according to different QoS levels, determined according to the priorities of different channels / signals / logi...

Embodiment 2

[0424] The relevant indication information in this embodiment is the size of the data packet to be transmitted, and determining the LBT mechanism and / or the LBT mechanism parameter set according to the relevant indication information specifically includes:

[0425] Preset the corresponding data size intervals to be transmitted for each LBT mechanism and / or LBT mechanism parameter set; select the LBT mechanism and / or the LBT mechanism parameter set for competitive access to the channel; in this embodiment, the size range of the data to be transmitted includes: [x1, x2], [x3, x4], [x5, x6], [x7, x8], to be transmitted The data size intervals can partially overlap or not. Generally, the minimum value of the interval sorted later is less than or equal to the minimum value of the interval sorted earlier, and the minimum value of the interval sorted later is greater than the minimum value of the interval sorted earlier . In this embodiment, the size of the data packet to be trans...

Embodiment 3

[0429] The relevant indication information in this embodiment is the number of subframes that are continuously scheduled. Determining the LBT mechanism and / or the LBT mechanism parameter set according to the relevant indication information is similar to determining the LBT mechanism and / or the LBT mechanism parameter set according to the size of the data packet to be transmitted, specifically including :

[0430] Preset the interval of the number of consecutively scheduled subframes corresponding to each LBT mechanism and / or LBT mechanism parameter set; The LBT mechanism and / or the LBT mechanism parameter set corresponding to the frame number interval perform channel contention access. The value principle and overlapping situation of the continuously scheduled subframe number interval are the same as the data size interval to be transmitted. In this embodiment, it is assumed that the continuously scheduled subframe number interval includes: [m1, m2], [m3, m4], [ m5, m6], [m7,...

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Abstract

The invention discloses a method and apparatus for determining LBT mode and the method for accomplishing LBT mode switching, comprising: based on related instruction information and / or priority information and / or measurement information, determining the listen before talk (LBT) mode or the LBT mode parameter set; and carrying out by a transmission device the contention access of channel according to the determined LBT mode and / or the LBT mode parameter set. According to the invention, it is possible to determine a LBT mode. Through the choice of the LBT mode, it is possible to avoid the wastes on the channel resources and instruction information by an improper LBT mode, therefore, increasing the efficiency of contention access of channel.

Description

technical field [0001] The present application relates to wireless communication technology, in particular to a method and device for realizing LBT mode switching. Background technique [0002] With the rapid growth of data services, the data transmission pressure on licensed spectrum carriers is also increasing. Therefore, using unlicensed spectrum carriers to share the data traffic in licensed carriers has become an important evolution direction for subsequent LTE development. . Unlicensed spectrum has the following advantages: no need to purchase, free or low-cost spectrum resources; individuals and enterprises can participate in the deployment, with low access requirements; it includes 5GHz, 2.4GHz and other frequency bands, with large available bandwidth; it has the characteristics of shared resources, multiple When different systems are operating in it or when different operators of the same system are operating in it, spectrum utilization efficiency can be improved b...

Claims

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Application Information

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IPC IPC(8): H04W16/14H04W74/08
CPCH04W16/14H04W74/0833H04W74/0808H04W72/23H04W74/0875H04W72/0446H04W76/27
Inventor 杨玲苟伟彭佛才毕峰赵亚军
Owner ZTE CORP
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