HARQ-ACK information feedback and receiving method and equipment

A receiving method and a technology of a feedback unit, which are applied in the field of feedback and reception of HARQ-ACK information, and can solve problems such as the inapplicability of DAI instructions

Active Publication Date: 2017-04-05
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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  • HARQ-ACK information feedback and receiving method and equipment
  • HARQ-ACK information feedback and receiving method and equipment
  • HARQ-ACK information feedback and receiving method and equipment

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

[0173] 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:

[0174] 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 Mapping value for each DL DAI;

[0175] 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;

[0176] Step 203: UE determin...

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Abstract

The invention provides an HARQ-ACK information feedback method. According to the method, DL Assignment is transmitted in a time-frequency binding window corresponding to uplink subframes of corresponding HARQ-ACK feedback by a base station. The DL Assignment includes DL DAI. A UE receives DL-Assignment transmitted by scheduling downlink HARQ in the time-frequency binding window so that the DL DAI in the DL-Assignment is acquired and the mapping value of each DL DAI is determined; and then the HARQ-ACK bit of each HARQ feedback unit is mapped to the corresponding bit of a feedback bit sequence according to the mapping value of the corresponding DL DAI. The invention also discloses DL-Assignment generation equipment and HARQ-ACK information feedback equipment. With application of the method and the equipment, multiple HARQ-ACK feedback transmitting the carriers of the downlink data from different time points in the same downlink subframe can be supported so that the ineffective HARQ-ACK bit can be effectively eliminated, the HARQ-ACK feedback efficiency can be enhanced and the downlink peak rate of the UE can be ensured.

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 Applications(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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