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A detection method of ack/nack and dtx

A detection threshold, user equipment technology, applied in the direction of error prevention/detection, connection management, electrical components, etc. using the return channel, to achieve the effect of reducing the number, reducing the complexity, and improving the accuracy of judgment

Inactive Publication Date: 2018-09-28
POTEVIO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the DTX detection threshold is related to the number of receiving antennas and the format of PUCCH1x, and multiple thresholds are needed to meet the requirements of the above scenarios.

Method used

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  • A detection method of ack/nack and dtx
  • A detection method of ack/nack and dtx
  • A detection method of ack/nack and dtx

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Embodiment Construction

[0025] In order to make the technical principles, features and technical effects of the technical solution of the present application clearer, the technical solution of the present application will be described in detail below in conjunction with specific embodiments.

[0026] Assume that the base station (eNB) receives the frequency-domain pilot symbols of user equipment u on each Orthogonal Frequency Division Multiplexing (OFDM) symbol l and each subcarrier k expressed as:

[0027]

[0028] The frequency domain data symbols are expressed as:

[0029]

[0030] Among them, superscript RS means pilot, superscript Data means data, X u (l, k) is the spreading sequence value of the spreading sequence on symbol l and subcarrier k; H u (l,k) is symbol l, channel frequency response on subcarrier k; W u (l) Block spread sequence value on symbol l; N(l, k) is the noise on symbol l and subcarrier k. u is the serial number of the user equipment, u∈U, U is all available orthogona...

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Abstract

The invention discloses an ACK / NACK and discontinuous transmission DTX detection method, comprising the following steps: A, calculating an average signal-to-noise ratio of uplink control channel receiving signals of receiving antennas in a current receiving sub-frame; B, comparing the average signal-to-noise ratio with a preset DTX detection threshold, if the average signal-to-noise ratio is larger than the DTX detection threshold, it is deemed that user equipment sends ACK / NACK; and if the average signal-to-noise ratio is smaller than the DTX detection threshold, it is deemed that the user equipment sends no signal and is in a DTX state. Compared with the prior art, the ACK / NACK and discontinuous transmission DTX detection method in the technical scheme of the invention achieves relatively low complexity.

Description

technical field [0001] The present application relates to the technical field of mobile communication, in particular to a method for detecting ACK / NACK and discontinuous transmission (DTX). Background technique [0002] In the LTE (Long Term Evolution) system, the uplink control channel (PUCCH) will feed back the downlink channel acknowledgment / negative acknowledgment (ACK / NACK) information. If the user equipment receives the downlink data packet correctly, it will feed back the acknowledgment (ACK). If the downlink data packet is not received correctly, a negative acknowledgment (NACK) will be fed back. If the user equipment does not correctly receive the control information indicating the downlink data packet, it will not feed back any signal, which is called Discontinuous Transmission (DTX) . [0003] The DTX detection method in the prior art is as follows: the test statistic for DTX detection is constructed according to the NP (Neyman-Pearson) criterion, and the test st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/16H04W76/28
Inventor 闫亮
Owner POTEVIO INFORMATION TECH CO LTD
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