Blind Detection Method Reducing Terminal Power Consumption
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Solution Overview
Problem
The complexity and resource-intensive nature of blind detection on physical downlink control channels (PDCCH) in communication systems, particularly due to the need to determine the quantity of blind detections and channel estimation for control channel elements (CCEs), lead to increased power consumption and overheads for terminal side devices, especially when receiving multiple pieces of downlink control information (DCI).
Innovation Solution
A method where a network side device provides first indication information to a terminal side device, indicating specific operations for time units within a transmission time unit, allowing the terminal to determine the quantity of blind detections and non-overlapping CCEs needed, and to perform these operations only when necessary, thereby reducing overhead and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal side device performs blind detection on PDCCH candidates to receive DCI, then the terminal can obtain scheduling information, but the complexity and resource consumption of blind detection significantly increases
Solution Approach 1:
The patent segments the transmission time unit into multiple time units (e.g., spans) and applies different blind detection operations to different segments. The network side device indicates which time units require blind detection operations, allowing the terminal to perform operations only on indicated segments rather than all segments, thereby reducing overall complexity while maintaining reliable DCI reception.
Solution Approach 2:
The patent applies partial action by allowing the terminal to perform blind detection operations only on indicated time units rather than all time units. The network side device controls the terminal to perform at least one of three operations (determining quantity of blind detections, determining quantity of CCEs, determining whether quantities exceed maximums) only on indicated time units, reducing unnecessary computational overhead.
2Quantity of substance
If the terminal side device determines the quantity of blind detections and CCEs for channel estimation, then the terminal can optimize resource usage, but the determining operations consume a large amount of resources
Solution Approach 1:
The network side device performs preliminary action by indicating in advance which time units require blind detection operations. The terminal receives indication information before performing operations, allowing it to pre-plan resource allocation and avoid unnecessary computational operations, thereby reducing power consumption while optimizing resource usage.
Solution Approach 2:
The terminal uses the indication information received from the network to autonomously determine which operations to perform on which time units. The terminal services itself by making intelligent decisions about resource allocation based on the indication, avoiding unnecessary operations and reducing power consumption without external control for each operation.
3Adaptability or versatility
If the terminal side device performs blind detection on multiple PDCCH candidates simultaneously, then the terminal can receive multiple DCI pieces, but the complexity of blind detection significantly increases
Solution Approach 1:
The patent segments the multi-DCI reception process by applying different operations to different time units. The network side device indicates which time units contain DCI candidates, allowing the terminal to focus blind detection operations on specific segments rather than processing all time units uniformly, thereby managing complexity while maintaining multi-DCI reception capability.
Solution Approach 2:
The patent applies partial action by having the terminal perform blind detection operations only on indicated time units that contain DCI candidates. The terminal receives indication information specifying which time units require attention, performing operations only where necessary rather than exhaustively searching all time units, reducing complexity while maintaining versatility.
Data Source
AI summary
Embodiments of this application provide a blind detection method. A terminal side device receives first indication information from a network side device, where the first indication information is used to determine at least one of N time units, a first time unit in the N time units corresponds to a type of terminal operation, the terminal operation is not performing a first operation, a second operation, and a third operation, the N time units belong to a same transmission time unit, and any one of the N time units includes at least one symbol, where N is an integer greater than 0. The terminal side device determines the N time units based on the first indication information, and performs the corresponding terminal operation in the first time unit in the N time units.