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An uplink transmission method and device based on authorized assisted access laa system

A technology of authorized assisted access and transmission method, which is applied in the field of uplink transmission method and device based on authorized assisted access LAA system, which can solve the problems of multiplexing, failure of multiple UEs, channel occupation, etc., and improve the successful access channel The effect of the probability of

Active Publication Date: 2021-10-01
HUAWEI TECH CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if figure 1 As shown, if all symbols of the uplink subframes N+4, N+5, and N+6 are used to send data, then the channel is always occupied, and other UEs cannot access the channel, resulting in multiple UEs Uplink multiplexing is not possible

Method used

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  • An uplink transmission method and device based on authorized assisted access laa system
  • An uplink transmission method and device based on authorized assisted access laa system
  • An uplink transmission method and device based on authorized assisted access laa system

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Embodiment Construction

[0024] The terms used in the embodiments of the present invention are only used to explain specific examples of the present invention, and are not intended to limit the present invention.

[0025] Such as figure 2 As shown, the listen-before-talk LBT access mechanism involved in the embodiment of the present invention is: in the LAA communication system, the node (such as UE2) monitors whether the channel is idle before sending data each time, and if the channel is not idle ( That is, if the clear channel assessment (Clear Channel Assessment, CCA) fails), then do not access the channel (that is, send data), and then try to access after waiting for a period of time. That is to say, only when the channel is idle (that is, the free channel assessment CCA succeeds), the node can access the channel, so as to avoid interrupting the ongoing transmission process of other nodes. Need to explain, figure 2 It is only an example, which is used to assist in describing the embodiment of...

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Abstract

The embodiment of the present invention discloses an uplink transmission method and device based on authorized assisted access LAA system. The method includes: for a transmission block transmitted on an unlicensed carrier, in the subframe of the uplink transmission block corresponding to the transmission block , reserving at least one SC-FDMA symbol; wherein, on the at least one reserved SC-FDMA symbol, the user equipment accesses a channel through a listen-before-talk LBT access mechanism. The above scheme can realize that the time gap for accessing the channel through LBT is reserved for other UEs in the uplink transmission block, and the probability of other UEs successfully accessing the channel is improved, so that multiple user equipments in the LAA communication system can perform uplink multiplexing.

Description

technical field [0001] The present invention relates to the field of communication technology, and in particular to an uplink transmission method and device based on authorized assisted access LAA system. Background technique [0002] Although the mobile communication technology is constantly evolving and the mobile communication network is becoming more and more mature, the surge of mobile data traffic is still a real challenge that operators need to face. It is under this continuous pressure that operators focus more on the efficient use of unlicensed (Unlicense) spectrum resources. The Licensed-Assisted Access Using Long Term Evolution (LAA) -LTE) technology came into being. [0003] LAA is part of the 3GPP LTE Advanced Pro Release 13 specification. From a definition point of view, LAA refers to the use of LTE network technology in the unlicensed frequency band. Based on the carrier aggregation architecture, the licensed frequency band carrier is used as the primary cel...

Claims

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Application Information

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IPC IPC(8): H04W16/14
CPCH04W16/14H04W74/0808H04W28/26H04W72/1268Y02D30/70H04L27/2636
Inventor 徐凯李晓翠
Owner HUAWEI TECH CO LTD
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