V2X UE Radio Resource Selection via Periodic Sub-Window Sensing
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Solution Overview
Problem
In V2X communications, existing sensing-based resource allocation methods require long sensing windows, leading to high energy consumption and complex operations, which are problematic for energy-restricted UEs like pedestrian devices, and reduced sensing windows may miss relevant booking messages, affecting performance and causing collisions.
Innovation Solution
Implementing a method where UEs monitor radio resources for booking messages within a sub-period value that is less than the basic period value, allowing for selective resource selection based on potentially used radio resources and timing, thereby reducing energy consumption and computational complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If long sensing windows are used for resource allocation, then detection accuracy of booking messages is improved, but energy consumption and operational complexity increase
Solution Approach 1:
The patent divides the sensing window into multiple sub-windows corresponding to different basic periods. Instead of continuously monitoring the entire sensing window, the UE performs sensing in discrete sub-windows at specific time intervals, thereby reducing overall energy consumption while maintaining detection capability for periodic booking messages.
Solution Approach 2:
The patent implements periodic sensing based on the periodic nature of booking messages. The UE senses radio resources at regular intervals matching the basic period of message transmission, rather than continuously monitoring. This periodic approach reduces energy consumption while ensuring detection of recurring booking messages.
2Measurement precision
If long sensing windows are used for resource allocation, then detection accuracy of booking messages is improved, but operational complexity increases
Solution Approach 1:
The patent segments the sensing process into discrete sub-windows associated with each basic period. This segmentation simplifies the operational complexity by breaking down the continuous sensing task into manageable periodic intervals, making the system easier to implement and manage while maintaining detection accuracy.
Solution Approach 2:
By establishing a periodic sensing rhythm that aligns with the basic period of message transmission, the patent reduces operational complexity. The UE follows a predictable sensing schedule rather than continuously processing signals, which simplifies resource management and reduces computational burden.
3Use of energy by moving object
If reduced sensing windows are used, then energy consumption and computational complexity are reduced, but relevant booking messages may be missed
Solution Approach 1:
The patent implements dynamic sensing window adjustment where the sensing duration and timing are adapted based on the basic period of message transmission. The sensing window is dynamically positioned to capture booking messages at their expected transmission times, ensuring reliable detection while minimizing unnecessary sensing periods.
Solution Approach 2:
The patent synchronizes the reduced sensing windows with the periodic transmission pattern of booking messages. By aligning sensing activities with the known periodicity of message arrivals, the system maintains high detection reliability despite using shorter sensing intervals, as each sensing window is strategically positioned to catch incoming messages.
Data Source
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AI summary
A method by a first UE for selecting a radio resource for transmitting a packet, includes obtaining a basic period value related to expected timing of transmissions by a second UE. A sub-period value is obtained that is less than the basic period value. Radio resources are monitored for a packet or booking message that is transmitted by the second UE and indicates that the second UE will potentially transmit a next packet using a radio resource and timing. The monitoring is restricted to a timeframe determined based on the sub-period value within each occurrence of a time period determined based on the basic period value. Responsive to the monitoring identifying the packet or booking message, a radio resource is selected for use in transmitting a packet based on the radio resource and timing that is potentially to be used by the second UE to transmit the next packet.