Feedback and receiving method and device of harq-ack information

A feedback unit and channel technology, applied in the field of HARQ-ACK information feedback and reception, can solve the problem that DAI indication is not applicable, and achieve the effect of ensuring downlink peak rate and improving efficiency

Active Publication Date: 2021-11-05
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then, when among multiple carriers, some carriers still use 1ms TTI, while some carriers use smaller TTIs and can start sending from the middle of the 1ms subframe, the existing DAI indication cannot be applied

Method used

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  • Feedback and receiving method and device of harq-ack information
  • Feedback and receiving method and device of harq-ack information
  • Feedback and receiving method and device of harq-ack information

Examples

Experimental program
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Embodiment 1

[0101] This embodiment provides a feedback method for HARQ-ACK information, which is used in a downlink multi-carrier transmission system, such as a CA system or a DC (dual connectivity) system, wherein the method includes:

[0102] Step 101: The UE receives the DL-Assignment for scheduling downlink HARQ transmission within the time-frequency binding window corresponding to the uplink subframe that feeds back the HARQ-ACK, acquires the first type of DL DAI in the DL-Assignment, and determines each first Mapping value of class DL DAI;

[0103] Step 102: The UE detects the HARQ feedback units in each downlink HARQ transmission within the time-frequency binding window, and determines the corresponding HARQ-ACK bits;

[0104] Step 103: UE determines the total length O of the feedback bit sequence fed back on subframe n according to the detected DAI ACK .

[0105] Step 104: The UE maps the HARQ-ACK bits of each HARQ feedback unit to corresponding bits of the feedback bit sequence...

Embodiment 2

[0174] Based on the first embodiment, this embodiment further includes the second type of DL DAI in the DL-Assignment, and further considers the value of the second type of DL DAI when performing HARQ-ACK bit mapping. Specifically, a feedback method of HARQ-ACK information provided in this embodiment is used in a downlink multi-carrier transmission system, such as a CA system or a DC (dual connectivity) system, and the method specifically includes:

[0175] Step 201: The UE receives the DL-Assignment for scheduling downlink HARQ transmission in the time-frequency binding window corresponding to the uplink subframe that feeds back the HARQ-ACK, obtains the first type of DAI and the second type of DAI in the DL-Assignment, and determines Mapped values ​​for each DLDAI;

[0176] Step 202: The UE detects the HARQ feedback units in each downlink HARQ transmission within the time-frequency binding window, and determines the corresponding HARQ-ACK bits;

[0177] Step 203: UE determi...

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Abstract

This application proposes a feedback method for HARQ-ACK information. According to the method provided by this application, the base station sends DL Assignment within the time-frequency binding window corresponding to the uplink subframe fed back by the corresponding HARQ-ACK. DL DAI is included in DL Assignment. Within the time-frequency binding window, the UE receives the DL-Assignment for scheduling downlink HARQ transmission, obtains the DL DAI in the DL-Assignment, and determines the mapping value of each DL DAI; then, according to the corresponding DL DAI mapping value , mapping the HARQ-ACK bits of each HARQ feedback unit to corresponding bits of the feedback bit sequence. The present application also discloses a device for generating DL-Assignment and a device for feeding back HARQ-ACK information. The method and device disclosed in this application can support the HARQ-ACK feedback of multiple carriers that start sending downlink data from different time points in the same downlink subframe, effectively remove invalid HARQ-ACK bits, and improve HARQ-ACK The efficiency of ACK feedback, so as to ensure the UE's downlink peak rate.

Description

technical field [0001] The invention relates to wireless communication system technology, in particular to a method and device for feeding back and receiving HARQ-ACK information. Background technique [0002] In an enhanced LTE (LTE-A) system, a carrier aggregation (CA, Carrier Aggregation) technology is used to aggregate multiple component carriers (CC, Component Carrier) to obtain a larger operating bandwidth, thereby further increasing the data transmission rate. Among them, each CC corresponds to a cell (Cell). According to the current LTE standard (Rel-12), the UE can work on up to 5 CCs at the same time, one of which is the primary CC (Pcell, Primary Cell), and the other CCs are called secondary CC (Scell, Secondary Cell). [0003] In the downlink communication of the LTE-A system, the reliability of downlink data reception is ensured through a Hybrid Automatic Repeat reQuest (HARQ, Hybrid Automatic Repeat reQuest) technology. The UE receives the downlink grant (DL-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04L1/16
CPCH04L1/1657H04L1/1812H04L1/1861
Inventor 王轶张世昌付景兴李迎阳
Owner BEIJING SAMSUNG TELECOM R&D CENT
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