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HARQ information transmission method and device

A technology of information transmission and indication information, which is applied in the field of communication and can solve the problem of untimely HARQ information feedback

Pending Publication Date: 2021-10-19
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present application provides a HARQ information transmission method and device, which are used to solve the technical problem of untimely HARQ information feedback in the prior art

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  • HARQ information transmission method and device
  • HARQ information transmission method and device
  • HARQ information transmission method and device

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Embodiment Construction

[0072] In order to make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0073] The NR-U system can support HARQ information retransmission based on group feedback. Exemplarily, for the HARQ information that cannot be sent at the initially indicated position due to the failure of the terminal LBT, or the HARQ information that cannot be received correctly due to the interference of the network equipment, the network equipment may instruct the terminal to retransmit the HARQ information, without retransmitting data.

[0074] Specifically, when the network device performs data scheduling, it can indicate the group index information (group index), and for the physical downlink shared channel (Physical Downlink Share Channel, PDSCH) data with the same group index, the corresponding HARQ informati...

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Abstract

The embodiment of the invention provides an HARQ information transmission method and device, which can be applied to various communication systems, such as D2D, IoT, V2X, NB-IoT, NR unauthorized systems and the like, and is used for solving the technical problem that HARQ information feedback is not timely in the prior art. When the first device fails to successfully send the first HARQ information on the first time-frequency resource, or the second device fails to successfully receive the first HARQ information on the first time-frequency resource, the first device retransmits the first HARQ information on a second time-frequency resource used for transmitting second HARQ information corresponding to second data, wherein the first data and the second data can be data of different priorities and / or different groups, so that the HARQ retransmission flexibility can be improved, the first HARQ information is transmitted more timely, the time delay of data processing is reduced as much as possible, and a URLLC scene is better supported.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a HARQ information transmission method and device. Background technique [0002] In wireless communication systems, due to the influence of time-varying characteristics of wireless channels and multipath fading on signal transmission, and some unpredictable interference will cause signal transmission failure, so Hybrid Automatic Repeat reQuest (Hybrid Automatic Repeat reQuest, HARQ) mechanism or automatic repeat-request (Automatic Repeat-reQuest, ARQ) and other indication methods to perform error control. When the data arrives at the receiving device, the receiving device performs error detection on it, and returns a positive acknowledgment (Acknowledgment, ACK) if it is received correctly, and returns a negative acknowledgment (NegativeAcknowledgment, NACK) if it is wrong. It is not difficult to understand that the sending device can only know whether the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04W72/04H04W72/10
CPCH04L1/1812H04W72/0446H04W72/0453H04W72/56H04L1/1887H04L1/1861H04L5/0055H04L1/1896H04L1/1614H04L1/1864H04L5/0064H04L5/0094H04L5/0033H04L1/1854H04W72/044
Inventor 贾琼张佳胤
Owner HUAWEI TECH CO LTD
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