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LAA interception resource allocation method and device

A carrier and signaling technology, applied in the communication field for unlicensed spectrum, which can solve problems such as conflicts and inability to determine the redundant version of physical layer data.

Active Publication Date: 2019-10-25
SHANGHAI LANGBO COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The base station cannot determine whether the UE has performed uplink transmission in the scheduling subframe and the base station may not be able to determine the redundant version of the physical layer data sent by the UE in the scheduling subframe, that is, LBT and uplink synchronous HARQ will conflict

Method used

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  • LAA interception resource allocation method and device
  • LAA interception resource allocation method and device
  • LAA interception resource allocation method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Embodiment 1 illustrates the flow chart of uplink transmission on the LAA carrier, as shown in the attached figure 1 shown. attached figure 1 In , the base station N1 maintains the serving cell of the UE U2, wherein the steps identified in blocks F0 and F1 are optional.

[0079] For the base station N1, the first signaling is sent in step S11; in step S12, it is judged whether the target UE sends a wireless signal in the first subframe of the first carrier, and if it is judged that the target UE sends a wireless signal, in step S120, in the first The communication symbol is received on the first subframe of the carrier, and if it is judged that the target UE does not send a wireless signal, the receiving of the communication symbol on the first subframe of the first carrier is abandoned in step S121.

[0080] For UE U2, in step S21, the first signaling is received; in step S22, a listening operation is performed on the target bandwidth of the first carrier to determin...

Embodiment 2

[0086] Embodiment 2 illustrates the subframe timing diagram for performing LBT operations on the target bandwidth on the LAA carrier, as shown in the attached figure 2 shown. attached figure 2 In , a bold square identifies a subframe.

[0087] The base station first sends first signaling to the UE in subframe #1 of the second carrier, where the first signaling indicates a target bandwidth for performing a listening operation. The base station then sends second signaling to the UE in subframe #2 of the second carrier, and the second signaling schedules the frequency band in subframe #4 of the first carrier, that is, the first frequency band. The UE performs a listening operation in subframe #3 (that is, the previous subframe of subframe #4) to determine whether to send a wireless signal in subframe #4 of the first carrier, and if it determines to send a wireless signal, then in the first carrier Send communication symbols on subframe #4 of the first carrier; if it is judge...

Embodiment 3

[0091] Embodiment 3 illustrates a schematic diagram of the target bandwidth on the LAA carrier, as shown in the attached image 3 shown. attached image 3 In , a rectangular box with a thick line frame identifies a subcarrier group.

[0092] The base station sends first signaling to the UE, where the first signaling indicates a target bandwidth for performing a listening operation. The target bandwidth includes K1 discontinuous subcarrier groups in the frequency domain (respectively determined by the attached image 3 Indices 1-K1 in the thick-line box rectangle mark), each of the sub-carrier groups includes K2 continuous sub-carriers in the frequency domain, and the K1 and the K2 are both positive integers. The UE then performs a listening operation on the target bandwidth of the first carrier to determine whether to transmit a wireless signal in the first subframe of the first carrier, and if it determines to transmit a wireless signal, then transmits the communication on...

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Abstract

The invention provides an LAA interception resource allocation method and device. The method comprises: step 1, the UE receiving a first signaling, and the first signaling indicating a target bandwidth used for executing the interception operation; step 2, the UE performing interception operation on the target bandwidth of the first carrier to judge whether a wireless signal is sent in a first sub-frame of the first carrier or not, and if the wireless signal is judged to be sent, sending the communication symbol on the first sub-frame of the first carrier, and if the wireless signal is judgednot to be sent, keeping zero sending power on the first sub-frame of the first carrier; wherein the first signaling is a high-level signaling, and the first carrier is deployed in an unlicensed spectrum. The target bandwidth is a subset of the first carrier bandwidth. The LTE LAA introduced with the LBT technology can be compatible with a traditional UL HARQ scheme, and complex standard modification is avoided.

Description

[0001] This application is a divisional application of the following original application: [0002] -- Filing date of the original application: October 28, 2014 [0003] --Application number of the original application: 201410587264.1 [0004] --The name of the invention of the original application: a LAA interception resource allocation method and device technical field [0005] The present invention relates to a communication scheme using unlicensed spectrum in a wireless communication system, in particular to a communication method and device for unlicensed spectrum (Unlicensed Spectrum) based on LTE (Long Term Evolution, Long Term Evolution). Background technique [0006] In the traditional 3GPP (3rd Generation Partner Project, 3rd Generation Partnership Project) LTE system, data transmission can only occur on the licensed spectrum. However, with the rapid increase of traffic, especially in some urban areas, the licensed spectrum may be difficult Meet the needs of busi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04L5/00
Inventor 张晓博
Owner SHANGHAI LANGBO COMM TECH CO LTD