UE Power Saving Modes via Search Space Segmentation
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Solution Overview
Problem
Current wireless communication systems face challenges in balancing power saving and data transmission efficiency, particularly in user equipment (UE) where discontinuous reception (DRX) methods lead to delayed channel state acquisition, resulting in retransmissions and increased power consumption.
Innovation Solution
The UE determines an operating mode based on signaling and preset parameters to selectively monitor or skip downlink control channels, implementing various power saving modes that adjust monitoring configurations and timing to conserve power without compromising data transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If discontinuous reception (DRX) methods are used to save power, then power consumption is reduced, but channel state acquisition is delayed resulting in retransmissions
Solution Approach 1:
The patent segments the downlink control channel monitoring into different search spaces (first search space and second search space) with different monitoring requirements. The first search space monitors for power saving while the second search space ensures timely channel state acquisition, resolving the contradiction between power saving and reliability.
Solution Approach 2:
Different monitoring configurations are applied to different search spaces based on their specific functions. The first search space uses relaxed monitoring for power saving, while the second search space uses strict monitoring for timely channel state acquisition, allowing each region to have optimized local quality.
2Use of energy by moving object
If downlink control channel monitoring is reduced to save power, then power consumption is reduced, but data transmission efficiency decreases due to delayed channel state acquisition
Solution Approach 1:
The patent divides the control channel monitoring function into two segments: first search space for power-saving monitoring and second search space for efficiency-critical monitoring. This segmentation allows the system to maintain data transmission efficiency while reducing overall power consumption.
Solution Approach 2:
Instead of completely reducing monitoring as would be required for maximum power saving, the patent implements partial monitoring through the second search space that ensures timely channel state acquisition, thereby maintaining data transmission efficiency with reduced power consumption.
3Use of energy by moving object
If multiple power saving modes are implemented with different monitoring configurations, then power saving is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal search space structure that can serve multiple functions: power saving monitoring, timely channel state acquisition, and support for multiple power saving modes. This multi-functionality reduces the need for separate dedicated structures for each mode.
Solution Approach 2:
The patent uses parameter changes (monitoring periodicity, offset, search space configuration) to achieve different power saving modes rather than creating fundamentally different structures. This allows multiple modes to be implemented through configuration rather than complex hardware changes.
Data Source
AI summary
Techniques are described to enable a user equipment (UE) to save power consumption and/or can enable the UE to acquire the channel state in time without reducing the UE's data transmission efficiency. An example technique includes determining, by the communication device, an operating mode based on a first signaling, and operating the communication device in the operating mode, where the operating mode includes any one of a normal mode, a first power saving mode, a second power saving mode, a third power saving mode, or a fourth power saving mode.