Sidelink Discontinuous Reception Logical Channel Prioritization
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Solution Overview
Problem
In wireless communication systems, particularly in sidelink communication, devices face challenges with data loss and resource waste due to discontinuous reception (DRX) operations, where receiving devices may not be in active time during scheduled sidelink transmissions, leading to missed data and inefficient resource allocation.
Innovation Solution
The solution involves a method where a transmitting device selects a destination for sidelink transmission based on whether the associated receiving devices are in active time, ensuring that data is transmitted only when the receiving devices are monitoring their sidelink control channels, thereby minimizing data loss and optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If discontinuous reception (DRX) operations are used to save energy, then energy consumption is reduced, but data loss increases because receiving devices may not be in active time during scheduled transmissions
Solution Approach 1:
The transmitting device performs preliminary actions by determining whether the receiving device is in active time before scheduling sidelink transmissions. This advance checking prevents data loss by ensuring transmissions only occur when the receiver is monitoring, thus resolving the contradiction between energy saving and reliability.
Solution Approach 2:
The system implements feedback mechanisms where the transmitting device receives information about the receiving device's active time status. This feedback enables the transmitting device to adjust its transmission scheduling accordingly, preventing data loss while maintaining energy-efficient DRX operations.
2Use of energy by moving object
If discontinuous reception (DRX) operations are used to save energy, then energy consumption is reduced, but resource allocation efficiency deteriorates due to missed transmissions
Solution Approach 1:
The transmitting device determines the receiving device's active time status before scheduling transmissions. This preliminary action ensures that transmission resources are only allocated when the receiver is active, preventing wasted resources and maintaining high resource allocation efficiency while preserving energy-saving DRX operations.
Solution Approach 2:
The system dynamically adjusts transmission scheduling parameters based on the receiving device's active time status. By changing transmission timing parameters to align with active periods, the system maintains resource allocation efficiency without compromising energy-saving DRX operations.
3Productivity
If transmissions are scheduled without checking active time status, then transmission opportunities increase, but data loss increases due to transmissions during inactive periods
Solution Approach 1:
The system extracts and filters out transmission opportunities that would occur during inactive periods. By removing these ineffective transmission opportunities from the schedule, the system maintains only those transmissions that will actually reach the receiver, thus preserving reliability without significantly reducing overall productivity.
Solution Approach 2:
The transmitting device uses feedback about active time status to filter transmission opportunities. This feedback mechanism ensures that only viable transmission opportunities (those during active periods) are executed, eliminating data loss while maintaining high transmission productivity.
Data Source
AI summary
A method and apparatus are disclosed. In an example from the perspective of a first device, the first device performs sidelink communication with a first set of destinations, wherein one or more devices, associated with a destination of the first set of destinations, discontinuously monitor one or more sidelink control channels and/or one or more sidelink control informations (SCIs). The first device receives a sidelink grant from a network, wherein the sidelink grant is for performing a sidelink transmission at a first timing. The first device selects, from among a second set of destinations, a first destination for the sidelink transmission, wherein each destination of the second set of destinations is determined to have an active time for sidelink containing the first timing.