Downlink physical control channel detecting method and device

Abstract

The invention provides a downlink physical control channel detecting method applied to a user terminal in a new wireless NR system. The method comprises the following steps of: determining available aggregation levels according to the total number of control channel elements (CCE) in a control resource set CORESET occupied by a physical downlink control channel (PDCCH); determining the number of candidate sets corresponding to the available aggregation levels according to candidate set selection rules corresponding to search space types; selecting each of the available aggregation levels and the number of the candidate sets corresponding to the available aggregation levels, and performing PDCCH blind detection until the blind detection succeeds; and obtaining downlink control information (DCI) corresponding to the aggregation levels and the number of the candidate sets in the blind detection. The downlink physical control channel detecting method and device are easy to implement, support flexible and diverse configuration of the NR system, and achieve a better detection effect with lower complexity.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and more specifically, to a method and device for detecting a downlink physical control channel. Background technique [0002] 5G is the research and development focus of the communication industry in recent years. 5G will meet the requirements of 20Gbit / s fiber-like access rate, millisecond-level delay service experience, connection capability of hundreds of billions of devices, ultra-high traffic density and connection density, and a hundred times network 5G system design faces new challenges such as extreme indicators such as energy efficiency improvement, and how a system can meet various business needs at the same time. [0003] At present, most of the existing PDCCH blind detection methods are suitable for LTE systems, but not for NR systems. In NR systems, due to the large bandwidth of the system, if the PDCCH still occupies the entire bandwidth, it will not only was...

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Problems solved by technology

[0003] At present, most of the existing PDCCH blind detection methods are suitable for LTE systems, but not for NR systems. In NR systems, due to the large bandwidth of the system, if the PDCCH still occupies the entire bandwidth, it will not only waste resources, but also increase the complexity of blind detection. also big

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