DRX Configuration for V2X Power-Limited UEs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current vehicle-to-everything (V2X) communication systems face challenges in efficiently managing power consumption and optimizing communication strategies for different types of user equipment (UEs), particularly in scenarios where power-limited UEs like pedestrians require efficient data reception during V2X communications.
Innovation Solution
The implementation of discontinuous reception (DRX) techniques for Uu-based V2X communications, where assistance information about uplink transmissions is determined and transmitted to network entities to configure optimal DRX settings, allowing power-limited UEs to receive downlink transmissions only during designated on-durations, thereby reducing power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power-limited UEs continuously monitor downlink channels to receive V2X transmissions, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements discontinuous reception (DRX) where power-limited UEs monitor downlink channels periodically instead of continuously. The UE wakes up during configured on-durations to monitor for transmissions and enters sleep mode during off-durations, reducing power consumption while maintaining the ability to receive time-critical V2X communications when needed
2Reliability
If DRX is configured with longer on-durations to ensure reception of all transmissions, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent enables dynamic adjustment of DRX parameters including on-duration length, periodicity, and offset values. The network can configure different DRX settings based on traffic characteristics, allowing optimization between power saving and reception reliability by adapting the on-duration to match actual transmission patterns and urgency requirements
3Use of energy by moving object
If DRX parameters are optimized for power saving with shorter on-durations, then power consumption is reduced, but communication reliability deteriorates
Solution Approach 1:
The patent employs assistance information from source UEs that provides advance knowledge about transmission timing, periodicity, and traffic characteristics. This preliminary information allows the network to configure optimal DRX parameters that ensure the power-limited UE wakes up at the right times to receive transmissions, maintaining reliability even with shorter on-durations
4Adaptability or versatility
If different DRX configurations are provided for different V2X services, then service quality is improved, but device complexity increases
Solution Approach 1:
The patent separates DRX configuration into service-specific parameters where each V2X service can have its own DRX profile with customized on-duration, periodicity, and offset values. This segmentation allows different quality requirements for different services while managing complexity through structured configuration parameters that can be independently adjusted
Data Source
AI summary
Systems and techniques are provided for wireless communications. A first UE can determine assistance information corresponding to one or more uplink (UL) transmissions of the first UE, the assistance information indicative of a periodicity of the one or more UL transmissions. The one or more UL transmissions can be vehicle-to-everything (V2X) UL transmissions of the first UE. The first UE can transmit the assistance information to a network entity. The network entity can determine a discontinuous reception (DRX) configuration for a second UE based on the assistance information, the DRX configuration indicative of a DRX on-duration. The second UE can receive information indicative of the DRX configuration from the network entity. The second UE can receive, from the network entity and during the DRX on-duration, a downlink transmission associated with the first UE. The downlink transmission can be a V2X downlink transmission.