Method and device for transmitting downlink control information

Abstract

The embodiment of the invention discloses a method and device for transmitting downlink control information. The method comprises that: A base station determines a detection period of a terminal device detection DCI and at least one detection time within the detection period, wherein the detection period comprises at least two TTIs, the at least two TTIs comprising at least one TTI carrying the DCI and at least one TTI not carrying the DCI, the at least one detection time corresponds to the at least one TTI bearing the DCI, and the at least one detection time coincides with a start time of theat least one TTI bearing the DCI; The base station transmits the DCI to the terminal device at the at least one detection time in the detection period. Therefore, on the premise of not affecting theservice to be transmitted, the detection times of blind detection of PDCCH by the UE can be effectively reduced, and the energy consumption and the overhead of the UE can be reduced.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for transmitting downlink control information in the communication field. Background technique [0002] In a wireless communication system, such as a Long Term Evolution (LTE) system, a user equipment (User Equipment, UE) detects a Physical Downlink Control Channel (Physical Downlink Control Channel) in each transmission interval (Transmission Time Interval, TTI). Channel, PDCCH), to obtain downlink control information (Downlink Control Information, DCI) carried on the PDCCH within the TTI. [0003] In a TTI, the UE cannot know the size of the DCI in the TTI, as well as the format and specific location of the PDCCH before detection. This information requires the UE to try to detect all possible situations, that is, it can be determined after blind detection. The existing technology The UE performs PDCCH blind detection for each TTI. This detection method makes the U...

AI Technical Summary

Problems solved by technology

[0003] In a TTI, the UE cannot know the size of the DCI in the TTI, as well as the format and specific location of the PDCCH before detection. This information requires the UE to try to detect all possible situations, that is, it can be determined after blind detection. The existing technology The UE performs PDCCH blind detection for each TTI. This detection method makes the UE frequently perform PDCCH blind detection, resulting in huge power consumption of the UE.

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