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DCI (Downlink Control Information) detection method and device

A detection method and a technology of a detection device, which are applied in the field of communication, can solve the problems that DCI cannot be filtered out and the probability of DCI false detection is high, and achieve the effect of solving instability and rate drop

Active Publication Date: 2015-07-01
SPREADTRUM COMM (SHANGHAI) CO LTD
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Problems solved by technology

However, judging by the distance on the minimum path of the state machine output by the convolutional decoding during DCI demodulation, it is often encountered that the real DCI is often filtered out, and the wrongly detected DCI is often not filtered out.
[0009] Therefore, none of the existing filtering methods for DCI detection can well solve the problem of high DCI false detection probability.

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  • DCI (Downlink Control Information) detection method and device
  • DCI (Downlink Control Information) detection method and device
  • DCI (Downlink Control Information) detection method and device

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Embodiment Construction

[0040] In order to solve the problem of high DCI false detection rate, the DCI detection method of the embodiment of the present invention is as follows figure 1 shown, including:

[0041] Step S1, obtain the process data of DCI blind detection, the process data of DCI blind detection includes the descrambled data DataAftDescramble i , Decoded data DataAftDeConv i and the detected RNTI value DetRnti i , i is the PDCCH search space index;

[0042] Step S2, based on DetRnti i With the configured RNTI value SetRnti j The matching result from DataAftDeConv i Determine the data to be processed in DataAftDeConv k , k=i 0 i 1 ,...,i K-1 , i 0 i 1 ,...,i K-1 with DetRnti on the match i The i values ​​of are correlated and different;

[0043] Step S3, to DataAftDeConv k Perform encoding, rate matching and modulation to obtain the modulated data DataAftRebuildModulation k ;

[0044] Step S4, based on DataAftRebuildModulation k with DataAftDescramble k Calculate SetRnt...

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Abstract

A method and device for detecting DCI are provided. The method includes: obtaining intermediate data in DCI blind detection, the intermediate data including descrambled data, decoded data and detected RNTI values; determining data to be processed from the decoded data based on a matching result of the detected RNTI values and configured RNTI values; performing encoding, rate matching and modulation on the data to be processed to obtain modulated data; calculating confidence levels of the configured RNTI values based on the modulated data and the descrambled data; and when a maximum confidence level of the configured RNTI value is greater than a predetermined threshold of confidence level, determining that the data to be processed contains detected DCI. The probability of DCI misdetection may be reduced, and further the accuracy of uplink and downlink data on a mobile terminal and system stability may be ensured.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for detecting DCI in a long term evolution system. Background technique [0002] In a Long Term Evolution (LTE, Long Term Evolution) system, a downlink receiving process of a mobile terminal includes receiving a Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel). The PDCCH carries the downlink control information (DCI, Downlink Control Information) of one or more mobile terminals, including the downlink scheduling allocation information required for the mobile terminal to receive the demodulation and decoding of the Physical Downlink Shared Channel (PDSCH, Physical Downlink Shared Channel) , as well as scheduling authorization information such as resources and transmission formats that the mobile terminal should use when transmitting on the Physical Uplink Shared Channel (PUSCH, Physical Uplink Shared Channel), confirma...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/24
CPCH04W72/042H04W52/0229H04L5/0091H04L1/0038Y02D30/70H04L27/2679H04L27/2676H04W72/20H04W72/23H04L5/00H04W8/00
Inventor 沈旭强董霄剑
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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