PDCCH blind detection method and device, equipment and storage medium

Abstract

The embodiment of the invention provides a physical downlink control channel (PDCCH) blind detection method and device, equipment and a storage medium. The method comprises the following steps: acquiring a correlation value of each first demodulation reference signal (DMRS); traversing possible PDCCH configurations, determining corresponding possible control channel elements (CCE) according to the accessed PDCCH configurations, calculating a DMRS correlation coefficient of each CCE based on the correlation value of each first DMRS, and determining the accessed PDCCH configurations as candidate PDCCH configurations if the DMRS correlation coefficient of at least one CCE reaches a preset first threshold value; and traversing all the candidate PDCCH configurations, determining corresponding possible DCI lengths according to the accessed candidate PDCCH configurations, traversing the possible DCI lengths corresponding to all the candidate PDCCH configurations, performing verification, and determining the accessed candidate PDCCH configurations as target PDCCH configurations if the verification is passed. According to the method, blind detection can be carried out under the condition that most high-level configuration parameters or an RNTI type of UE cannot be known.

Description

technical field [0001] The present disclosure relates to the technical field of mobile communication, and in particular to a PDCCH blind detection method, device, equipment and storage medium. Background technique [0002] The physical downlink control channel (PhysicalDownlinkControlChannel, PDCCH) is mainly used to carry various downlink control information (DownlinkControlInformation, DCI). In the CCE space, each UE needs to perform blind detection on the CCE space to search out the control information of the UE. But on the one hand, not all CCEs must be allocated to UEs, and some CCEs may not carry any data; on the other hand, not all PDCCH configurations can guarantee that there are CCEs that carry data and are allocated to UEs. [0003] On the UE side, since it does not know which CCEs are occupied by its own PDCCH configurations or which PDCCH configurations have CCEs that can be occupied, it is necessary to perform blind detection on all possible PDCCH configuration...

AI Technical Summary

Problems solved by technology

[0005] In view of the above, in order to solve the problem in the existing PDCCH blind detection method that the UE is required to obtain most of the relevant parameters configured by the high layer and its own RNTI type, otherwise the blind detection cannot be performed, the first aspect of the present disclosure provides a PDCCH blind detection method. The detection method includes: obtaining the correlation value of each first demodulation reference signal DMRS, wherein the first DMRS is a DMRS sorted within the bandwidth range of any symbol; traversing possible PDCCH configurations, according to the visited PDCCH configuration, determining the corresponding possible control channel element CCE, calculating the DMRS correlation coefficient of each of the CCEs based on the correlation value of each of the first DMRS, if there is at least one DMRS correlation coefficient of the CCE reaching the preset The first threshold, then determine the accessed PDCCH configuration as a candidate PDCCH configuration; traverse all candidate PDCCH configurations, determine the corresponding possible DCI length according to the accessed candidate PDCCH configurations, and traverse each candidate The possible DCI length corresponding to the PDCCH configuration, check the DCI bits according to the accessed DCI length, and if the verification passes, determine the currently accessed candidate PDCCH configuration as the target PDCCH configuration

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