Dynamic PDCCH Search Space Configuration for 5G NR Terminals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G NR systems, the existing methods for detecting Physical Downlink Control Channel (PDCCH) are not flexible enough, requiring reconfiguration through RRC signaling, which increases signaling overhead and limits the ability to adjust PDCCH detection opportunities based on data service activity, leading to inefficient power management.
Innovation Solution
The method involves using control information, such as SR or BSR, to dynamically determine the Search Space (SS) for PDCCH detection, allowing the terminal device to switch between different SS periods without the need for RRC signaling reconfiguration, thereby reducing signaling overhead and enabling flexible PDCCH detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If PDCCH detection is configured through RRC signaling reconfiguration, then the detection parameters can be adjusted, but the signaling overhead increases and the flexibility is reduced
Solution Approach 1:
The patent makes the Search Space configuration dynamic by allowing the terminal to determine SS based on control information (SR/BSR) rather than static RRC configuration. The terminal can switch between different SS periods (first SS period for active state, second SS period for idle state) dynamically based on data service activity, eliminating the need for frequent RRC reconfiguration signaling.
Solution Approach 2:
The terminal autonomously determines the Search Space configuration based on the received control information (SR/BSR) without requiring network device intervention through RRC signaling. The terminal self-adjusts the PDCCH detection parameters according to its own data service status, reducing signaling overhead while maintaining adaptability.
2Productivity
If RRC signaling reconfiguration is used to adjust PDCCH detection opportunities, then the detection can be adapted to data service activity, but the power management efficiency is reduced due to signaling overhead
Solution Approach 1:
The patent enables dynamic switching between different Search Space periods based on terminal state. When data service is active, the terminal uses the first SS period for frequent PDCCH detection. When idle, it switches to the second SS period with longer interval, reducing detection frequency and saving power without requiring RRC signaling for each state transition.
Solution Approach 2:
The patent implements periodic PDCCH detection with different periods based on terminal state. The first SS period provides frequent detection opportunities for active data services, while the second SS period provides less frequent detection for idle states, optimizing power consumption while maintaining service responsiveness.
Data Source
AI summary
A physical downlink control channel detection method includes: sending, by a terminal device, control information to a network device; and determining, by the terminal device, a Search Space (SS) based on the control information, where the SS is used for the terminal device to detect a Physical Downlink Control Channel (PDCCH).