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Method for transmitting and receiving feedback information, access network device and terminal device

A technology for access network equipment and terminal equipment, which is applied in the field of information transmission and can solve problems such as the decline of system transmission efficiency.

Active Publication Date: 2018-07-31
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Obviously, in the process of information transmission, the terminal device provides feedback on the overall TB to the access network device, and at the same time, the retransmission of the access network device on the TB will cause a significant drop in system transmission efficiency

Method used

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  • Method for transmitting and receiving feedback information, access network device and terminal device
  • Method for transmitting and receiving feedback information, access network device and terminal device
  • Method for transmitting and receiving feedback information, access network device and terminal device

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Embodiment Construction

[0061] The technical solution in this application will be described below in conjunction with the drawings.

[0062] First, a brief description of the related concepts involved in the embodiments of the present application is given.

[0063] Transmission block TB and coding block CB: In the prior art, one TB is split into multiple CBs to perform channel coding and coding respectively. For example, for Turbo code, the maximum number of bits of a CB is 6144, that is, if the number of bits of a TB exceeds 6144, the TB needs to be split into multiple CBs to perform channel coding and coding respectively. For Low Density Parity Check Code (LDPC), the maximum number of bits in a CB is about 2000. Similarly, if the number of bits in a TB exceeds 2000, the TB needs to be split into more CBs. Perform separate encoding and decoding.

[0064] In addition, each CB has an independent verification function. Taking the Turbo code as an example, each CB performs a Cyclic Redundancy Check (CRC) be...

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Abstract

The invention provides a method for transmitting feedback information for improving the transmission efficiency of the system. The method comprises the following steps: a terminal device receives a transport block TB sent by an access network device in a first transmission time interval TTI, wherein the TB comprises at least two coding blocks CB, and the at least two CBs comprise a first part CB and a second part CB; if the terminal device receives the second part CB sent by the access network device in the second TTI and does not receive the first part CB, the terminal device sends first feedback information and second feedback information to the access network device, wherein the first feedback information is used for feeding back whether the terminal device correctly decodes the first part CB, and the second feedback information is used for feeding back whether the terminal device correctly decodes the second part CB, and the second TTI is located after the first TTI in time sequence.

Description

Technical field [0001] This application relates to the field of information transmission, and more specifically, to a method for sending and receiving feedback information, an access network device, and a terminal device. Background technique [0002] In the current Long Term Evolution (LTE) system, hybrid automatic repeat request (Hybrid Automatic Repeat Request, HARQ) feedback and information retransmission are all directed to Transport Block (TB). For example, the access network device sends a TB to the terminal device. Only when the terminal device decodes all the code blocks (CB) in the received TB successfully, the terminal device will send an acknowledgement (ACKnowledge , ACK) bits. As long as one CB fails to decode successfully, the terminal device will also feed back a NACKnowledge (NACK) bit to the access network device for the entire TB. Correspondingly, after the access network device receives the NACK feedback sent by the terminal device, it is not clear which CB ...

Claims

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Application Information

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IPC IPC(8): H04L1/16H04L1/18
CPCH04L1/1607H04L1/1806H04L1/1812H04L1/1829H04L1/0041H04L1/0061H04L1/0068H04L1/1816H04L1/1854H04L1/1864H04L1/1887H04L1/1896H04L1/16H04L1/18H04L5/0055H04W84/042
Inventor 官磊
Owner HUAWEI TECH CO LTD
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