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Method for detecting PDCCH in NR system

A centralized, search space technology, applied in transmission systems, digital transmission systems, wireless communications, etc., can solve problems such as the inapplicability of UE's exhaustive search and blind detection scheme

Active Publication Date: 2021-05-14
武汉恒达安网信息技术有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the technical problems existing in the prior art, the present invention provides a method for detecting PDCCH in the NR system, and solves the problem in the prior art that the common UE exhaustive search blind detection scheme is not applicable in the case of unknown RNTI and high-level parameters

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  • Method for detecting PDCCH in NR system
  • Method for detecting PDCCH in NR system
  • Method for detecting PDCCH in NR system

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Embodiment 1

[0074] Embodiment 1 provided by the present invention is an embodiment of a method for detecting PDCCH in an NR system provided by the present invention, combining figure 1 As can be seen, this embodiment includes:

[0075] Step 1, collecting search space configuration information of the base station.

[0076] Specifically, for the public search space, after the cell search process, the MIB (MasterInformation Block, master information block) information is obtained; where MIB->pdcch-ConfigSIB determines the CORESET configuration for the Type0-PDCCH public search space, including Type0 - the time-frequency resource occupied by the CORESET of the PDCCH common search space.

[0077] For the dedicated search space, the CORESET resource set configured by the cell through RRC signaling is collected.

[0078] Step 2, perform deinterleaving according to the collected search space configuration information.

[0079] Preferably, for the mapping from CCEs to REGs, the NR protocol supp...

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Abstract

The invention relates to a method for detecting a PDCCH in an NR system. The method comprises the following steps: collecting search space configuration information of a base station; carrying out de-interleaving according to the collected search space configuration information; selecting an aggregation level, and determining the position of a PDCCH candidate set in a search space according to the aggregation level; determining a descrambling parameter NID according to the PDCCH DMRS; establishing an RNTI candidate set, wherein the RNTI candidate set comprises candidate values of each RNTI with a corresponding priority sequence; sequentially selecting the RNTI with the highest priority in the RNTI candidate set, carrying out data descrambling, rate de-matching and Polar decoding according to the NID and the RNTI, then carrying out CRC verification, and determining the corresponding RNTI and DCI when the verification is correct; according to the invention, DCI information of all users in a cell coverage area can be detected under the condition that parameters configured by a high level for specific UE and RNTIs corresponding to all UE in a cell are unknown.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for detecting a PDCCH in an NR system. Background technique [0002] The 5G NR (New Radio, new air interface) system uses PDCCH (Physical Downlink Control Channel, physical downlink control channel) to transmit DCI (Downlink Control Information, downlink control signaling), including resource allocation information for scheduling uplink and downlink transmission, transmission block size, Modulation levels and antenna ports, etc. [0003] In order to avoid continuous interference between cells similar to the LTE (Long Term Evolution, long term evolution) PDCCH, the resource configuration of the NR PDCCH is more flexible. The maximum system bandwidth of NR in the frequency band below 6GHz is 100MHz, and the maximum system bandwidth of the frequency band above 6GHz can reach 400MHz. PDCCH does not need to occupy the entire system bandwidth to avoid wasting f...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04W72/04H04L1/00
CPCH04L5/0053H04L1/0061H04L1/0071H04W72/23
Inventor 郑高斌戴长江章永灿
Owner 武汉恒达安网信息技术有限公司
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