Sidelink DRX Configuration for Power Efficiency
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Solution Overview
Problem
Wireless communication systems face challenges in managing finite wireless channel resources due to signal attenuation and blocking in complex environments, particularly in sidelink communications where battery-operated devices need to balance power efficiency with advanced capabilities like device-to-device communication.
Innovation Solution
The solution involves coordinating sidelink discontinuous reception (DRX) configurations between user equipment to align active periods, ensuring that user equipment are active at the same time and reducing the need for frequent activation, thereby enhancing power efficiency while maintaining the ability to utilize sidelink communication capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If discontinuous reception (DRX) is configured on sidelink communication channels, then power efficiency is improved by reducing the need for frequent activation, but the ability to respond quickly to communication needs may be compromised
Solution Approach 1:
The patent applies preliminary action by having user equipment advance DRX configuration decisions and activate reception windows in advance based on predicted communication needs. The system proactively manages DRX cycles by anticipating when data transmission will occur and pre-positioning the reception window accordingly, rather than reacting passively to incoming data. This allows the device to maintain power efficiency while ensuring timely reception of data when needed.
2Use of energy by moving object
If user equipment coordinates sidelink DRX configurations to align active periods, then power efficiency is enhanced, but device complexity increases due to coordination requirements
Solution Approach 1:
The patent implements feedback mechanisms where user equipment exchange DRX configuration information and active period status with neighboring devices. This feedback loop allows devices to adjust their DRX cycles dynamically based on actual communication patterns and network conditions. The feedback mechanism enables automatic adaptation to changing conditions, reducing the need for complex manual coordination while maintaining power efficiency through synchronized active periods.
3Loss of energy
If discontinuous reception is used to conserve battery power, then energy consumption is reduced, but data latency increases due to periodic reception cycles
Solution Approach 1:
The patent applies dynamics by making DRX configuration adaptable rather than static. The system dynamically adjusts reception window durations, cycle lengths, and activation timing based on real-time network conditions, data traffic patterns, and device mobility states. When data latency is critical, the system can shorten DRX cycles or extend active periods; when power conservation is the priority, longer cycles are used. This dynamic adaptation resolves the contradiction between energy saving and latency reduction.
Data Source
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AI summary
Certain aspects of the present disclosure provide a method of wireless communications, including: receiving, at a first user equipment from a network, a sidelink discontinuous reception (DRX) configuration; configuring a sidelink DRX cycle at the first user equipment based on the sidelink DRX configuration; receiving, at the first user equipment from the network, data for a second user equipment; and sending, from the first user equipment to the second user equipment on a sidelink in accordance with the sidelink DRX cycle, the data for the second user equipment.