Terminal Device PDCCH Monitoring Search Space Configuration
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Solution Overview
Problem
In communication systems, terminal devices face high power consumption when monitoring physical downlink control channels (PDCCH) due to the need to continuously scan multiple search spaces, especially in discontinuous reception (DRX) mode, which is inefficient and consumes significant energy.
Innovation Solution
A method where a terminal device configures and switches between different search space configurations based on timer states, monitoring PDCCHs only in specific search spaces when certain conditions are met, thereby adjusting resource usage and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device monitors PDCCH in all configured search spaces to ensure complete control channel reception, then the reliability of control channel reception is improved, but the power consumption increases significantly
Solution Approach 1:
The patent segments the search space monitoring into two distinct configurations: a first search space configuration with fewer search spaces for normal operation, and a second search space configuration with all search spaces for enhanced reliability. The terminal device selectively applies these configurations based on timer states, thereby dividing the monitoring burden and reducing overall power consumption while maintaining reliability when needed.
Solution Approach 2:
The patent implements dynamic switching between different search space monitoring configurations based on the state of timers (first timer and second timer). When timers indicate normal operation, the device uses the first configuration with reduced monitoring. When timers indicate potential issues or special conditions, the device dynamically switches to the second configuration for comprehensive monitoring, thus adapting power consumption to actual system needs.
2Reliability
If the terminal device monitors PDCCH in multiple search spaces to ensure no control information is missed, then the completeness of control information reception is improved, but the time required for monitoring increases
Solution Approach 1:
The patent divides search space monitoring into two segmented configurations: a first configuration that monitors a subset of search spaces for typical operations, and a second configuration that monitors all search spaces for critical situations. This segmentation allows the device to complete monitoring faster during normal operations while ensuring completeness when required by timer states.
Solution Approach 2:
The patent employs periodic timer-based switching between monitoring configurations. The first and second timers create periodic opportunities to switch between the first search space configuration and the second search space configuration, allowing the device to alternate between faster partial monitoring and more comprehensive monitoring based on system conditions.
3Use of energy by moving object
If the terminal device uses a reduced search space configuration to lower power consumption, then the energy efficiency is improved, but the device complexity for managing multiple configurations increases
Solution Approach 1:
The patent uses dynamic timer-based control to automatically switch between configuration modes, reducing the need for complex manual or higher-layer configuration management. The first timer and second timer dynamically control when to apply the first search space configuration versus the second search space configuration, simplifying the management overhead while maintaining energy efficiency.
Solution Approach 2:
The terminal device autonomously manages the switching between different search space configurations based on timer states without requiring complex external control. The device self-regulates its monitoring behavior by evaluating timer conditions and automatically selecting the appropriate configuration, thereby reducing configuration management complexity while achieving energy savings.
Data Source
AI summary
A method for monitoring a communications channel between a terminal device and a network device is described. The method includes: obtaining a first search space configuration and a second search space configuration. The first search space configuration includes a first search space set and the second search space configuration includes a second search space set, or the first search space configuration includes a first search space parameter and the second search space configuration includes a second search space parameter. The method further includes monitoring a physical downlink control channel (PDCCH) based on the first search space configuration if a first condition is met. The first condition includes: a first timer is not in a running state; or monitoring, by the terminal device, a PDCCH based on the second search space configuration if a second condition is met. The second condition includes a first timer is in a running state.