Blind detection method of physical downlink control channel

Abstract

The application discloses a blind test method of a physical downlink control channel (PDCCH). On the basis of an employed PDCCH format during the latest downlink control information (DCI) detection by UE as well as the detection situation of the DCI, detection priority levels of all PDCCH formats in the PDCCH format candidate set are adjusted, so that the UE can use the correct PDCCH format rapidly during the current blind testing to carry out DCI detection. Therefore, the number of times for PDCCH format attempt during the blind test can be reduced, the blind test efficiency can be improved, and the UE power consumption cost can be reduced.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a blind detection method of a physical downlink control channel (PDCCH). Background technique [0002] In the LTE system, uplink and downlink resource scheduling is performed through a physical downlink control channel. For downlink resource allocation, the eNodeB first transmits resource allocation related information to the UE through the physical downlink control channel (PDCCH). After the UE detects the PDCCH sent to itself, it detects the data channel according to the control information in the PDCCH. Shared channel (PDSCH). For uplink, when the UE needs to send uplink data, it needs to initiate a scheduling request to the eNodeB, and the eNodeB indicates the uplink physical resources allocated to the UE through the PDCCH, and then the UE can send uplink data on the allocated physical resources. Therefore, in the LTE system, the control channel PDCCH plays a very importan...

AI Technical Summary

Problems solved by technology

However, the above second method needs to sort the PDCCH formats according to the measurement results of the noise variance of each subframe, so the accuracy of the noise variance measurement algorithm has a greater impact on the algorithm

In addition, the noise variance measurement results reflect the channel status of the PDSCH channel. Due to the different transmission methods and power control methods of the PDSCH and PDCCH channels, the PDSCH noise variance measurement results cannot fully reflect the channel status of the PDCCH channel.

Therefore, the above-mentioned second method is limited by the accuracy of the noise variance measurement results, and cannot ensure the accuracy of the prioritization of the PDCCH format, and thus cannot effectively improve the efficiency of blind detection

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