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Discontinuous transmission detection method

A transmission method, discontinuous technology, applied in the direction of error prevention/detection using the return channel, which can solve the problems of inability to apply, inability to calculate noise power, inability to use, etc.

Inactive Publication Date: 2014-11-26
POTEVIO INFORMATION TECH CO LTD
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Problems solved by technology

In this way, when there are no free orthogonal ZC sequences in the system, the noise power cannot be calculated, making the method unusable
In addition, this method cannot be applied to the situation where the UE uses multiple information bits to send a hybrid automatic repeat-request acknowledgment (HARQ-ACK)

Method used

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  • Discontinuous transmission detection method

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Embodiment Construction

[0018] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] The core idea of ​​the present invention is: after inverse processing of the received signal at the sending end, reconstruct the modulation symbol, use the reconstructed modulation symbol to construct a test statistic according to the NP criterion, and determine it according to the bit length of the HARQ-ACK information sent by the UE For the relevant detection state number, set the corresponding inspection threshold value according to the detection state number and the preset false alarm probability, and finally compare the inspection statistic with the threshold value to determine whether there is information to send. In this way, since the above method does not rely on the implementation of the orthogonal sequence, it is not limi...

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Abstract

The invention discloses a discontinuous transmission detection method. The method comprises the following steps: a received signal is reversely processed, a modulation symbol is reconstructed, and the test statistics is calculated accordingly; then, the threshold of the test statistics is judged according to the condition number X expected during base station detection and the probability of false alarm desired by a system; and finally, whether UE transmits a signal is judged according to whether or not the test statistics is greater than the threshold. By adopting the discontinuous transmission detection method, whether the UE transmits a signal can be detected effectively, and the detection is not constrained by whether or not the system has an idle orthogonal ZC sequence. The method is also applicable to the situation in which the UE uses a plurality of information bits to transmit HARQ-ACK.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a detection method for discontinuous transmission (Discontinuous Transmission, DTX). Background technique [0002] In 3G and 4G mobile communication systems, user equipment (User Equipment, UE) realizes the reception and transmission of service data through the authorization and scheduling of the base station. For the downlink service data, the UE notifies the base station whether the downlink service data is received correctly by feeding back ACK / NACK on the uplink. However, since the UE may fail to detect the downlink grant, the UE will not feed back ACK / NACK information on the uplink at this time. From the perspective of receiving ACK / NACK from the base station, this situation is called discontinuous transmission. Since the base station does not know whether ACK / NACK is sent, if it cannot distinguish whether to send a signal, ACK / NACK will be received incorrectly. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18
Inventor 陈新敏郑辰郭晨雷旭
Owner POTEVIO INFORMATION TECH CO LTD
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