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User equipment and its data transmission method and device

A data transmission method and technology of a data transmission device, which are applied in the directions of digital transmission systems, transmission systems, and multiple use of transmission paths, can solve problems such as failure to guarantee success, and achieve the effect of improving reliability.

Active Publication Date: 2022-03-22
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the unlicensed frequency band of the 5G new air interface, the user equipment can perform LBT (listen before talk, listen before talk) transmission on multiple subbands according to the scheduling information of the base station (Note: The term LBT can be replaced by channel access ), due to the uncertainty of the LBT process, it is impossible to guarantee the success of LBT on all subbands
[0012] For the situation where LBT is only successful on some sub-bands, there is no research on this aspect (that is, related transmission strategies, such as possible necessary signaling during transmission and corresponding behaviors of user equipment or base stations, etc.) in the prior art

Method used

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  • User equipment and its data transmission method and device
  • User equipment and its data transmission method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] As described below, an embodiment of the present invention provides a data transmission method.

[0054] First of all, the data transmission method in this embodiment is applicable to the unlicensed frequency band of the 5G new air interface, and is generally applicable to user equipment to perform. We assume that the user equipment has adopted an uplink LBT strategy similar to LTE LAA / eLAA / feLAA.

[0055] refer to figure 1 The flow chart of the data transmission method shown in the following will be described in detail through specific steps:

[0056] S101. Perform LBT transmission on multiple subbands in an unlicensed frequency band of the 5G NR.

[0057] The base station sends some configuration information to the user equipment, and the configuration information may be carried by high layer signaling (such as RRC) or MAC-CE or PDCCH.

[0058] According to the configuration information from the base station, the user equipment performs LBT transmission on multiple...

Embodiment 2

[0119] As described below, an embodiment of the present invention provides a data transmission device.

[0120] refer to figure 2 The structural block diagram of the data transmission device shown.

[0121] The data transmission device includes: a transmission unit 201, a detection unit 202, a calculation unit 203 and a selection unit 204; wherein the main functions of each unit are as follows:

[0122] The transmission unit 201 is adapted to perform LBT transmission on multiple subbands in the unlicensed frequency band of the 5G new air interface according to the configuration information from the base station;

[0123] The detection unit 202 is adapted to detect that LBT is successful on only some of the subbands in the plurality of subbands during the LBT transmission process;

[0124] A calculation unit 203, adapted to determine the number of CBGs contained in each transport block;

[0125] The selection unit 204 is adapted to select a corresponding number of CBGs from...

Embodiment 3

[0136] As described below, embodiments of the present invention provide user equipment. The user equipment supports an unlicensed frequency band of the 5G new air interface.

[0137] The difference from the prior art is that the user equipment further includes the data transmission apparatus provided in the embodiment of the present invention. Therefore, the user equipment can perform LBT transmission on multiple subbands in the unlicensed frequency band of the 5G new air interface, and determine that each The number of CBGs contained in a transmission block and select the corresponding number of CBGs for transmission. The CBGTI used to indicate which CBGs are transmitted is included in the UCI for transmission. In the process of subsequent transmission, according to the feedback from the base station to indicate which CBGs The HARQ-ACK field of successful / failed transmission is retransmitted by PUSCH, so as to formulate a reasonable transmission strategy for the situation wh...

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Abstract

User equipment and its data transmission method and device, the data transmission method includes: in the process of the LBT transmission, it is detected that only some of the subbands in the plurality of subbands are successful in LBT; determine that each transmission block contains The number of CBGs; select the corresponding number of CBGs from the required CBGs for transmission, and UCI includes CBGTI, which is used to indicate the transmitted and / or untransmitted CBGs; in the process of subsequent transmission, according to the instructions of the base station The PUSCH retransmission is performed using the HARQ‑ACK field, and the HARQ‑ACK field is used to indicate successful and / or failed CBGs among the previously transmitted CBGs of the user equipment. The present invention formulates a reasonable transmission strategy for the situation that LBT succeeds on only some of the subbands in the multiple subbands in the unlicensed frequency band of the 5G new air interface, and improves the reliability of transmission.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a user equipment and its data transmission method and device. Background technique [0002] 5G New Air Interface (5GNR) is a global 5G standard based on a new air interface design based on OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology. Low cost, high reliability and many other advantages. Recently, the plenary meeting of the international standards organization 3GPP (Third Generation Partnership Project) has approved the independent networking standard of the fifth-generation mobile communication technology 5G new air interface. [0003] The multichannel LBT (Listen-Before-Talk) scheme is defined in LTE LAA / eLAA / feLAA, and there are two ways: [0004] Mode A: The base station performs CAT4LBT on each CC (Component Carrier). [0005] A1: Each CC maintains its own backoff timer (backoff counter). I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04L1/16H04L1/18H04W72/04
CPCH04L5/0053H04L1/1607H04L1/1812H04W72/0453
Inventor 张萌张飒
Owner SPREADTRUM COMM (SHANGHAI) CO LTD