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Feedback method of downlink subframe response information and base station thereof

A technology of answering information and downlink, which is applied in wireless communication, error prevention/detection using the return channel, electrical components, etc., and can solve the problem that the base station cannot know which channel the terminal is using.

Active Publication Date: 2014-02-05
NANJING ZHONGXING XIN SOFTWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The present invention provides a downlink subframe response information feedback method and a base station, which are used to solve the problem that the base station cannot know which channel the terminal is using when the terminal feeds back ACK / NACK information on M available PUCCH channels. The base station determines the channel used by the terminal, and reports the real feedback information on the channel to the MAC

Method used

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  • Feedback method of downlink subframe response information and base station thereof
  • Feedback method of downlink subframe response information and base station thereof
  • Feedback method of downlink subframe response information and base station thereof

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Embodiment 1

[0045] In time-division duplex mode, the uplink and downlink configurations are 2, M=4, and the terminal maps the reception status of these 4 downlink subframe data to b(0) according to the 3GPP (3rd Generation Partner Project; 3rd Generation Partnership Project) protocol , b(1), and use PUCCH format 1b in M ​​available PUCCH channel resources Send b(0) on one of the channels, b(1), according to the technical solution provided by the present invention, the method for the base station to detect the PUCCH channel used by the user is as follows:

[0046] Please refer to image 3 , which is a flow chart of the base station judging the PUCCH channel used by the terminal according to the embodiment of the present invention,

[0047] Step 1: The base station calculates the 4 PUCCH channels available to the terminal according to the provisions of the 3GPP protocol, namely

[0048] Step Two: Base Station Pair Perform detection and calculate the corresponding CINR of these 4 chan...

Embodiment 2

[0056] Please refer to Figure 4 , which is a structural block diagram of a base station for judging the PUCCH channel used by the terminal according to an embodiment of the present invention, which mainly includes a channel resource calculation module, a CINR calculation module, a CINR maximum search module, a channel determination module, and a demodulation module, wherein each module The main functions are as follows:

[0057] The channel resource calculation module is used for the base station to calculate the M PUCCH channels available to the terminal;

[0058] The CINR calculation module is used to obtain the CINR of data received by each channel resource;

[0059] The module for finding the maximum value of CINR is used to find the maximum value of CINR corresponding to M channel resources;

[0060] The channel determination module is used to determine a channel used by the terminal according to the detection result;

[0061] The demodulation module is used for the b...

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Abstract

The invention discloses a feedback method of downlink subframe response information and a base station thereof. The method comprises the following steps that: a terminal selects a channel from M available physical uplink control channels (PUCCHs) to send feedback information of M downlink subframes to the base station; the base station detects the M available PUCCHs and determines one channel for the terminal to use; the base station demodulates the feedback information on the channel and reports a demodulation result to media access control (MAC). By using the above technical scheme, when the terminal feeds back acknowledged / non-acknowledged (ACK / NACK) information on the M possible PUCCHs, the base station can know which channel the terminal uses. Therefore, the base station can determine the channel that the terminal uses and the real feedback information on the channel can be reported to the MAC.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a feedback method of downlink subframe response information and a base station. Background technique [0002] Hybrid Automatic Repeat Request (HARQ) technology, after receiving the codeword, the decoder at the receiving end first checks the error situation, and if it is within the error correction capability, it will automatically correct the error; if the number of errors exceeds Error correction capability means that errors cannot be corrected, but errors can only be detected. At this time, the receiving end sends a signal to the sending end through the feedback channel, asking the sending end to resend the information. In an Orthogonal Frequency Division Multiplexing (OFDM) system, the correctness / error of the transmission data is expressed through the positive / negative acknowledgment (Acknowledged / Non-Acknowledged, ACK / NACK) control signaling to inform the send...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/16H04W24/10H04W88/08
Inventor 韩露佳李萍张娜
Owner NANJING ZHONGXING XIN SOFTWARE CO LTD