Terminal Downlink Control Channel Blind Detection Method
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Solution Overview
Problem
Current mobile communication systems lack a definitive method for determining whether to continue blind detection of a downlink control channel after successfully receiving a specific DCI format, leading to increased energy consumption and latency, especially in scenarios requiring beam-based transmission and inter-cell interference coordination.
Innovation Solution
A method for a terminal to determine whether to continue detecting the downlink control channel based on blind detection indication information carried in the DCI, using N-bit or M-bit information domains to indicate the number of DCI formats to be received, allowing the terminal to adjust its detection accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal monitors the downlink control channel on an entire transmission bandwidth, then the reliability of transmission is improved, but the energy consumption of the terminal increases
Solution Approach 1:
The patent divides the downlink control channel monitoring into different search spaces (common search space and UE-specific search space) and different detection stages. The terminal performs blind detection in the common search space first, and only continues to UE-specific search space if needed, segmenting the monitoring process to reduce overall energy consumption while maintaining reliability.
Solution Approach 2:
The patent implements preliminary detection in the common search space before proceeding to UE-specific search space. By performing initial blind detection and checking for DCI format presence in advance, the system determines whether further monitoring is necessary, avoiding unnecessary energy consumption in later stages.
2Area of stationary object
If the terminal performs blind detection on DCI formats, then the coverage scope of base station is improved, but the latency at terminal side increases
Solution Approach 1:
The patent segments the blind detection process into multiple stages: first detecting in common search space, then conditionally detecting in UE-specific search space. This segmentation allows the terminal to quickly determine if DCI is present without exhaustively searching all possible formats and locations, reducing latency while maintaining coverage.
Solution Approach 2:
The system performs preliminary blind detection in the common search space to determine whether DCI formats are present before committing to more time-consuming UE-specific search space monitoring. This preliminary action reduces overall detection time and terminal latency.
3Reliability
If the base station transmits DCI format on different beams, then the reliability of transmission is improved, but the device complexity increases
Solution Approach 1:
The patent uses a universal blind detection mechanism that works across different beams and search spaces. The same DCI format structures and detection procedures are applied universally in common and UE-specific search spaces, as well as across different beams, reducing terminal complexity through standardized processes rather than beam-specific implementations.
Data Source
AI summary
Provided are a method for determining whether to continue to detect a downlink control channel, a terminal and a base station, for solving the technical problem, for which there is no specific solution in the prior art, of how to determine, after successfully receiving one piece of DCI of a specific DCI format, whether it is still necessary to continue to perform a blind test according to the DCI format. The method for determining whether to continue to detect a downlink control channel comprises: the terminal obtaining first downlink control information (DCI); and the terminal determining, based on the first DCI, whether to continue to detect the downlink control channel.