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Acknowledgement feedback in unlicensed new radio

A wireless communication and downlink technology, applied in the field of acknowledgment feedback, which can solve the problems of incorrect ACK codebook size, inability to receive downlink messages correctly, etc.

Pending Publication Date: 2020-12-25
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In deployments supporting unlicensed spectrum (e.g., unlicensed NR), one or more downlink messages may not be received correctly and the wireless device may determine an incorrect or inefficient ACK codebook size for sending ACK feedback

Method used

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  • Acknowledgement feedback in unlicensed new radio
  • Acknowledgement feedback in unlicensed new radio
  • Acknowledgement feedback in unlicensed new radio

Examples

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Embodiment Construction

[0032] In some wireless communication systems (eg, New Radio (NR)), a user equipment (UE) may utilize a hybrid access request (HARQ) acknowledgement (ACK) feedback scheme to indicate that one or more downlink control messages are being received Whether one or more downlink data messages (eg, Physical Downlink Shared Channel (PDSCH) messages) have been successfully received and decoded from the base station afterward (eg, Physical Downlink Control Channel (PDCCH) messages). Therefore, the UE can determine the HARQ ACK codebook size for sending the HARQ ACK feedback, where the HARQ ACK codebook can indicate the payload size for the HARQ ACK feedback in addition to how to fill the payload. For example, the HARQ ACK codebook may indicate that the HARQ ACK feedback includes the number of downlink data messages and / or HARQ processed feedback with a corresponding size (eg, number of bits) for sending the HARQ ACK feedback.

[0033] In some cases, the ACK codebook size may be based in...

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PUM

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Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) and a base station may communicate in an unlicensed spectrum (e.g., a shared radio frequency spectrum band). As such, the UE may determine a codebook size for transmitting hybrid access request (HARQ) acknowledgement (ACK) feedback with respect to the unlicensed spectrum. Accordingly, the UE may base theHARQ ACK codebook size on a number of HARQ processes with which the UE has been configured. Additionally or alternatively, the UE may base the HARQ ACK codebook size on a number and / or duration of downlink channel monitoring occasions indicated by the base station. In some cases, the UE may base the HARQ ACK codebook size on a combination of the techniques described herein.

Description

[0001] cross reference [0002] This patent application claims U.S. Provisional Patent Application No. 62 / 648,852, entitled "Acknowledgment Feedback in Unlicensed New Radio," by Zhang et al., filed March 27, 2018; and Zhang et al., filed February 21, 2019 US Patent Application No. 16 / 281,828, entitled "Acknowledgment Feedback in Unlicensed New Radio," each of which is assigned to the assignee herein. Background technique [0003] The following relates generally to wireless communications, and more specifically to acknowledgment (ACK) feedback in non-licensed new radio (NR). [0004] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems are capable of supporting communication with multiple users by sharing available system resources (eg, time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems such...

Claims

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Application Information

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IPC IPC(8): H04L1/16H04L1/18
CPCH04L1/1685H04L1/1822H04L1/1854H04L1/1861H04L1/1864H04L1/1812H04L5/0055H04W72/23
Inventor 张晓霞Z.范K.巴塔德J.孙T.卡多斯S.耶拉马利
Owner QUALCOMM INC