PDCCH Detection Power Optimization via BWP Switching
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Solution Overview
Problem
Power consumption in user equipment (UE) remains a significant issue, particularly in the detection of physical downlink control channels (PDCCH), which affects the standby and usage time of UE devices.
Innovation Solution
A communication device is designed to switch between active bandwidth parts (BWP) of a serving cell based on indicators, determining whether to detect a PDCCH according to a set search space, thereby optimizing PDCCH detection and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCCH detection is performed continuously in all bandwidth parts, then control channel reception reliability is improved, but power consumption increases
Solution Approach 1:
The patent divides the bandwidth part into multiple search space sets, each with different monitoring configurations. The UE can selectively monitor different search space sets based on received indicators, segmenting the PDCCH detection task to reduce overall power consumption while maintaining reliability through distributed monitoring across multiple sets
Solution Approach 2:
The patent introduces dynamic switching between different PDCCH monitoring behaviors based on received indicators. The UE can dynamically adjust its detection strategy between full monitoring and reduced monitoring modes, allowing adaptive power consumption management while maintaining service quality based on current network conditions
2Use of energy by moving object
If PDCCH monitoring is reduced to save power, then power consumption decreases, but control channel detection capability deteriorates
Solution Approach 1:
The patent uses preliminary indicators received from the network to pre-determine the appropriate PDCCH monitoring behavior before actual detection. Based on these advance indicators, the UE can proactively adjust its monitoring configuration to match expected traffic patterns, ensuring detection capability is maintained when needed while reducing power consumption during low-activity periods
Solution Approach 2:
The patent implements a feedback mechanism where the network provides indicators about upcoming PDCCH transmission patterns, and the UE adjusts its monitoring behavior accordingly. This feedback loop allows the system to optimize the balance between power consumption and detection capability based on actual network conditions and traffic requirements
Data Source
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AI summary
A communication device for handling a physical downlink (DL) control channel (PDCCH) reception comprises at least one storage device; and at least one processing circuit, coupled to the at least one storage device. The at least one storage device stores instructions, and the at least one processing circuit is configured to execute the instructions of changing from a first active bandwidth part (BWP) of a serving cell of a network to a second active BWP of the serving cell according to at least one first indicator; and determining whether to detect a PDCCH according to at least one search space (SS) set for the serving cell, after changing to the second active BWP.