Sidelink Discontinuous Reception Pattern Selection for Power Management
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Solution Overview
Problem
Current sidelink discontinuous reception (SL-DRX) technologies face challenges in power management for user equipment, particularly for vulnerable road users and public safety applications, where efficient power saving is needed without extensive coordination among multiple user devices, and existing solutions are impractical due to dynamic changes in user device statuses and channel conditions.
Innovation Solution
A method and apparatus for managing sidelink discontinuous reception by obtaining and selecting predefined semi-static ON-OFF patterns based on use cases, service profiles, and device statuses, allowing user devices to configure and align their DRX operations with other devices, reducing the need for extensive coordination and optimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If discontinuous reception patterns are dynamically coordinated among multiple user devices, then power saving is improved, but device complexity and coordination overhead increase
Solution Approach 1:
Each user device independently selects and determines its own discontinuous reception pattern based on its service requirements and device status, without requiring coordination with other devices. The device autonomously configures its DRX operation by selecting from predefined patterns, thereby achieving power saving while avoiding coordination complexity.
Solution Approach 2:
The discontinuous reception operation is divided into distinct predefined patterns, each optimized for specific use cases and service profiles. By segmenting the DRX configuration into discrete selectable patterns, the system enables simple pattern selection rather than complex dynamic coordination, reducing device complexity while maintaining power efficiency.
2Reliability
If discontinuous reception patterns are selected based on dynamic device statuses and channel conditions, then communication reliability is improved, but the complexity of pattern selection increases
Solution Approach 1:
Discontinuous reception patterns are pre-configured and predefined for various service profiles and device statuses. Instead of performing complex real-time analysis and selection, the device simply matches its current status to the appropriate pre-defined pattern, thereby maintaining communication reliability while significantly reducing selection complexity.
Solution Approach 2:
The system changes key parameters of the DRX pattern (such as on-duration, off-duration, and cycle length) based on discrete device statuses and service profiles. By using parameter-based pattern selection rather than complex algorithms, the system adapts to different conditions while keeping the selection process simple.
3Reliability
If sidelink communication operates with always-on assumption, then communication availability is improved, but power consumption increases
Solution Approach 1:
The discontinuous reception system dynamically adapts its operation by selecting different patterns based on service requirements and device status. The DRX configuration changes dynamically between active communication phases and power-saving phases, allowing the system to maintain availability when needed while reducing power consumption during idle periods.
Solution Approach 2:
The system implements periodic discontinuous reception patterns with defined on-durations and off-durations. During on-durations, the device is active for communication; during off-durations, the device enters sleep mode to save power. This periodic operation maintains communication availability while significantly reducing average power consumption compared to always-on operation.
Data Source
AI summary
Methods, apparatuses and computer program products for configuring a discontinuous reception pattern for a receiver of a wireless communication device. In accordance with an embodiment, the method includes obtaining two or more discontinuous reception patterns for a wireless communication device to be used in sidelink communication with one or more user devices; selecting at least one discontinuous reception pattern from the two or more discontinuous reception patterns for the wireless communication device; and receiving signals from the one or more other devices and/or transmitting signals to the one or more other devices for the sidelink communication according to the selected at least one discontinuous reception pattern.