Sidelink Resource Allocation for Aperiodic Traffic
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Solution Overview
Problem
Conventional sidelink resource allocation solutions for vehicle-to-everything (V2X) communications, particularly in LTE, are inadequate for aperiodic traffic transmission as they rely on predictable periodicity, failing to support power-saving and reliable resource selection for unpredictable aperiodic transmissions.
Innovation Solution
A method where a terminal device monitors sidelink control information for frequency and time resource assignments, measures the power of reference signals, and determines resource availability based on these assignments and power levels, enabling efficient resource allocation for aperiodic traffic transmission while considering resource reservations by other devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sidelink resource allocation methods are used for aperiodic traffic, then resource allocation can be performed, but the methods fail to support power-saving and reliable resource selection due to reliance on predictable periodicity
Solution Approach 1:
The patent applies dynamics by enabling terminal devices to dynamically adjust their resource allocation strategy based on traffic characteristics. The device can switch between monitoring all sidelink control information (full sensing) and monitoring only selected information (partial sensing) depending on whether traffic is periodic or aperiodic, making the system adaptable to different traffic patterns while maintaining reliability
Solution Approach 2:
The patent changes the monitoring parameter from fixed periodic monitoring to flexible adaptive monitoring. By adjusting the amount of sidelink control information monitored based on traffic type and device capabilities, the system achieves both power-saving for aperiodic traffic and reliable resource selection for periodic traffic
2Reliability
If terminal devices perform full sensing of sidelink channels, then resource selection reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies partial action by allowing terminal devices to monitor only a subset of sidelink control information when performing partial sensing. Instead of monitoring all control information, the device selectively monitors relevant portions based on its capabilities and traffic requirements, reducing power consumption while maintaining sufficient reliability for resource selection
Solution Approach 2:
The system dynamically adjusts the sensing depth based on device capabilities and traffic characteristics. Capable devices can perform full sensing for maximum reliability, while capability-constrained devices can perform partial sensing to save power, making the power consumption adaptable to actual needs rather than fixed at high levels
3Ease of manufacture
If terminal devices with different capabilities use the same resource allocation method, then implementation is simplified, but capability-constrained devices cannot achieve power-saving
Solution Approach 1:
The patent applies local quality by allowing different terminal devices to use different sensing and resource allocation methods according to their specific capabilities. Capability-constrained devices can use simplified partial sensing with reduced monitoring requirements, while capable devices can use full sensing, making the implementation tailored to each device's characteristics rather than forcing a one-size-fits-all approach
4Productivity
If conventional resource allocation assumes periodic traffic, then resource allocation can be performed efficiently, but aperiodic traffic transmission cannot be supported
Solution Approach 1:
The patent makes the resource allocation system dynamic by allowing terminal devices to adapt their resource selection based on actual traffic arrivals. For aperiodic traffic, devices can perform resource selection immediately when traffic arrives rather than waiting for predetermined periodic intervals, maintaining efficiency for the actual traffic pattern while supporting both periodic and aperiodic transmissions
Data Source
AI summary
Embodiments of the present disclosure provide a solution for sidelink resources allocation. In a method for communication, a first terminal device monitors a control channel from a second terminal device for sidelink control information. The sidelink control information indicates a frequency resource assignment and a time resource assignment to be used by the second terminal device. Then the first terminal device measures a power of a reference signal received on a channel associated with the sidelink control information, and determines availability of a first resource in a set of resources for the first terminal device at least based on the frequency resource assignment, the time resource assignment and the power. With the embodiments of the present disclosure, sidelink resource allocation can be performed for aperiodic traffic transmission.