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Method and device for reporting uplink control information uci

A technology for controlling information and channels, applied in sub-channel allocation of transmission paths, digital transmission systems, electrical components, etc., can solve problems such as inability to feed back UCI, inability of base stations to obtain downlink channel information, and reduce the success rate of downlink data transmission, etc., to improve The effect of downlink data transmission success rate

Active Publication Date: 2020-11-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a method and device for reporting uplink control information UCI, so as to at least solve the problem in the related art that when the terminal fails to perform CCA on an unlicensed carrier, the UCI cannot be fed back, and the base station cannot know the information of the downlink channel. , the problem of reducing the success rate of downlink data transmission

Method used

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  • Method and device for reporting uplink control information uci
  • Method and device for reporting uplink control information uci
  • Method and device for reporting uplink control information uci

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0063] This embodiment describes the carrier configuration reported by UCI.

[0064] The base station configures at least two reporting carriers for each unlicensed carrier of the terminal, including at least one carrier of other configured carriers and / or one licensed carrier in addition to the own carrier. The reporting carrier configuration of the uplink control information corresponding to each carrier is as follows: image 3 as shown, image 3 It is a schematic diagram of carrier configuration for uplink control information feedback according to an embodiment of the present invention, wherein: each unlicensed carrier may have multiple carriers for UCI reporting. For example, the carrier to which the uplink control information of the unlicensed carrier cell4 is reported may be a licensed carrier and an unlicensed carrier cell3 in addition to the own carrier. Although multiple feedback carriers (that is, candidate carriers) are configured, the terminal finally performs fe...

Embodiment 2

[0071] This embodiment describes the triggering condition for the transmission of uplink control information on an unlicensed carrier.

[0072] When there is a downlink service in the carrier configured by the terminal that needs to feed back ACK / NACK, or there is periodic CSI or aperiodic CSI that needs to be reported, UCI needs to be transmitted on the configured candidate carrier.

[0073] Among them, the conditions for the base station to aperiodically trigger CSI reporting include:

[0074] When the base station has a CSI-RS to send on the carrier, and when the base station is about to compete for the unlicensed carrier resource and is about to send the PDSCH, it then triggers the UE to aperiodically feed back CSI, including CQI / PMI / RI. Or when there is a carrier that triggers scheduling among the carriers configured by the UE, for example, there happens to be an uplink service that needs to be scheduled on this carrier, and the aperiodic CSI is triggered to be sent toget...

Embodiment 3

[0079] This embodiment describes a method for sending uplink control information.

[0080] The system pre-defines or the base station configures a UCI sending time window, and the window size can be 2ms, or 3ms or 4ms. The UE has multiple opportunities to perform CCA within this transmission window, or the UE starts to perform CCA from the starting point of this window. After one success, it can send UCI in the current subframe or the next subframe. If it is unsuccessful, it will send UCI in the next subframe. The location of the CCA continues to perform the CCA.

[0081] That is, the UCI may be sent one or two subframes before the predetermined subframe, or may be sent one or two subframes after the predetermined subframe.

[0082] Figure 4 is a schematic diagram of uplink control information feedback according to an embodiment of the present invention, as shown in the attached Figure 4 As shown: assuming that the UCI transmission window defined by the system is 2 ms, the ...

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Abstract

The present invention provides a method and apparatus for reporting uplink control information (UCI). The method comprises: determining more than two candidate UCI reporting carriers that are used for reporting UCI and that are corresponding to unlicensed carriers; and reporting the UCI by using the determined more than two candidate UCI reporting carriers. By means of the present invention, the problem, in the prior art, of failure to feed back UCI due to unsuccessful execution of CCA on unlicensed carriers by a terminal and the problem of reduction of the success rate of downlink data transmission due to failure to obtain information about a downlink channel are resolved; accordingly the effects are achieved: the terminal can feed back the UCI when the terminal fails to execute the CCA on the unlicensed carriers, it is ensured that the base station obtains the information about the downlink channel in time, and the success rate of downlink data transmission is improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for reporting uplink control information UCI. Background technique [0002] It is an important content in the LTE evolution process that the Long-Term Evolution (LTE for short) system uses an unlicensed carrier to work. This technology will enable the LTE system to use existing unlicensed carriers, greatly enhance the potential spectrum resources of the LTE system, and enable the LTE system to obtain lower spectrum costs. [0003] There are two main modes for LTE to use unlicensed, one is Carrier Aggregation (CA for short), unlicensed is used as an auxiliary component carrier access, and the other is Dual Connectivity (DC for short). access mode. [0004] According to the existing protocol, the uplink control information (UCI for short) of the terminal is only transmitted on one uplink carrier at a certain moment, and for the channel state information (Chan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00
CPCH04L5/003H04L5/0091H04L5/00
Inventor 李新彩苟伟赵亚军毕峰
Owner ZTE CORP