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PDCCH blind detection method, terminal and storage medium for 5g communication system

A communication system and blind detection technology, applied in the field of mobile communication, can solve the problems of reducing blind detection efficiency, detection difficulty and complexity, and achieve the effect of improving blind detection efficiency and reducing processing complexity

Active Publication Date: 2022-07-29
广东世炬网络科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of detection equipment does not obtain the allocation of C-RNTI when detecting PDCCH, and C-RNTI will affect the CCE set position in the private search space and the CRC check after decoding. Performing PDCCH blind detection under low conditions will greatly increase the difficulty and complexity of detection and reduce the efficiency of blind detection

Method used

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  • PDCCH blind detection method, terminal and storage medium for 5g communication system
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  • PDCCH blind detection method, terminal and storage medium for 5g communication system

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Embodiment 1

[0045] Please refer to figure 1 , figure 1 This is a schematic diagram of the principle of an embodiment of a PDCCH blind detection method for a 5G communication system according to the present invention. This embodiment is described by taking a terminal UE as an execution subject. like figure 1 shown, it includes the following steps:

[0046] Step S101, it is sequentially judged whether the candidate CCEs included in the search space satisfy the power judgment condition.

[0047] Specifically, in the 5G wireless communication system, the search space is divided into two types: common search space (CSS, CommonSearch Space) and UE specific search space (USS, UE Specific Search Space); the common search space CSS is mainly used when accessing The UE-specific search space USS is used after access. Among them, the common search space is divided into 5 different types of search spaces: Type0-PDCCH common search space, Type0A-PDCCH common search space, Type1-PDCCH common search ...

Embodiment 2

[0074] Please refer to figure 2 , which is a specific implementation process of determining a candidate CCE set in the PDCCH blind detection method for a 5G communication system of the present invention. like figure 2 shown, it includes the following steps:

[0075] Step S201: Detect the PDCCH scrambled by the fixed common RNTI, calculate the REG average power or the CCE average power of the PDCCH, and use it as the reference received power of the terminal.

[0076] Step S202: Calculate the allowable deviation of the power, and determine the power decision range according to the reference received power and the allowable deviation of the power.

[0077] Step S203, delete the detected CCEs of the PDCCH scrambled by the common RNTI from all the CCE sets corresponding to the search space to obtain a candidate CCE set.

[0078] Step S204, it is sequentially judged whether the average power of the candidate CCEs in the set of candidate CCEs is within the power judgment range. ...

Embodiment 3

[0085] Please refer to image 3 , which is a specific implementation process of blind detection of candidate PDCCHs based on the determined set of candidate CCEs in the PDCCH blind detection method for 5G communication systems of the present invention. like image 3 shown, it includes the following steps:

[0086] Step S301, the order of aggregation levels is preset.

[0087] Step S302, extracting candidate CCEs of a certain aggregation level from the candidate CCE set, and combining the candidate CCEs into candidate PDCCHs for the candidate CCEs under the aggregation level.

[0088] Step S303, performing demodulation, descrambling, and rate matching on the candidate PDCCH to obtain a bit stream d;

[0089] Step S304, performing Polar decoding on the bit stream d to obtain decoded soft bits;

[0090] Step S305, judge the decoded soft bits to obtain a decoded DCI bit stream;

[0091] Step S306, carries out forward Polar coding to the DCI bit stream that decoding obtains, o...

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Abstract

The invention discloses a PDCCH blind detection method, a terminal and a storage medium for a 5G communication system. Candidate CCEs, after performing power judgment on all the candidate CCEs in the search space, the candidate CCE set is obtained; the candidate PDCCH set is determined according to the candidate CCE set, and the validity detection of the candidate PDCCHs in the candidate PDCCH set is performed, and the validity detection includes the candidate PDCCH Decoding is performed, and the decoding result is reversely encoded to obtain a local encoding result. When the similarity between the local encoding result and the received encoding result satisfies the similarity threshold, it is determined that the candidate PDCCH is valid. Compared with the prior art, the present invention greatly reduces the blind detection processing complexity of the terminal and improves the blind detection efficiency.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, and in particular, to a PDCCH blind detection method, a terminal and a storage medium for a 5G communication system. Background technique [0002] The dynamic scheduling of each physical channel in the 5G wireless communication system protocol is indicated by Downlink Control Information (DCI). For the terminal UE, the UE blindly checks its own physical downlink control channel PDCCH in the search space according to the configuration of the base station. , extract the DCI information carried by the PDCCH, and perform subsequent data reception or transmission. [0003] The physical control channel is responsible for the transmission of various key control information at the physical layer, and is the key to the operation of the 5G new air interface (New Radio, NR). The Physical Downlink Control Channel (PDCCH) carries the Downlink Control Information (DCI) sent by the 5G base...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04L1/00
CPCH04L5/0053H04L1/0057Y02D30/70
Inventor 邓勇志
Owner 广东世炬网络科技有限公司