PDCCH blind detection method for SNR mean feedback and CCEs energy judgment in 5G

A technology of energy judgment and average value, which is applied in the field of communication, can solve the problems of low blind detection efficiency and achieve the effects of high blind detection efficiency, stable performance, and reduced aggregation level

Active Publication Date: 2020-05-29
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Although this method is simple and does not require additional computational overhead, blind detection is very inefficient

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  • PDCCH blind detection method for SNR mean feedback and CCEs energy judgment in 5G
  • PDCCH blind detection method for SNR mean feedback and CCEs energy judgment in 5G
  • PDCCH blind detection method for SNR mean feedback and CCEs energy judgment in 5G

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Embodiment Construction

[0049] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0050] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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Abstract

The invention relates to a PDCCH blind detection method for SNR mean feedback and CCEs energy judgment in 5G, and belongs to the technical field of communication. The method comprises the following steps: (1) an aggregation level priority selection method based on SNR mean value feedback: according to a reported CQI period T and a reported CQI value, calculating the mean value of SNRs of the firstn times, and corresponding to different aggregation levels; and under the condition that the detection of the first aggregation level fails, determining whether the aggregation level is searched in an increasing or decreasing manner; and (2) a CCE decision method based on CCEs candidate set energy: entering a PDCCH under a corresponding aggregation level according to the method in the step (1), and deciding whether to bear DCI (Downlink Control Information) messages required by UE; and when the detection fails or no DCI is judged, performing the same judgment on the energy statistical maximumvalues calculated twice and the energy of the next CCE candidate set until the blind detection succeeds or all the judgment under the aggregation level is finished. The method is stable in performance, low in calculation complexity and high in blind detection efficiency.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a PDCCH blind detection method for SNR mean value feedback and CCEs energy judgment in 5G. Background technique [0002] The physical downlink control channel (PhysicalDownlinkControlChannel, PDCCH) of the 5G system is the controller for scheduling uplink and downlink resources of the system, and carries the downlink control information (DCI) of one or more terminals (UserEquipment, UE). In order to reduce the signaling overhead on the air interface and save wireless resources, the base station will not inform the UE of the DCI type carried by the PDCCH and the position of the corresponding Control Channel Elements (CCE) in the time-frequency resource when sending the PDCCH. The UE needs to perform blind detection on the entire area, and this control area is called a control resource set (ControlResourceSet, CORESET) in 5G. [0003] In the 5G system, the search space is simi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04W72/04
CPCH04L1/0038H04L1/0061H04W72/23
Inventor 张治中王玲杨钦雲胡玲玲
Owner CHONGQING UNIV OF POSTS & TELECOMM
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