Sidelink Resource Selection for High-Speed User Equipment
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Solution Overview
Problem
In wireless communication networks, user equipment (UE) experiences increased power consumption and latency due to frequent sidelink resource pool reconfigurations, especially during high-speed operations.
Innovation Solution
The UE dynamically selects sidelink resources based on a speed threshold, prioritizing resources associated with a high speed flag or preconfigured resources if the high speed flag is not available, and if the time interval since the last sidelink transmission exceeds a threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs frequent sidelink resource pool reconfigurations to avoid interference and collisions, then communication reliability is improved, but power consumption increases and latency occurs
Solution Approach 1:
The patent applies parameter changes by detecting UE speed and using different resource pool configurations based on speed thresholds. For high-speed UEs, the system configures resource pools with larger time intervals between transmissions and adjusts resource selection parameters, reducing the frequency of reconfigurations while maintaining communication reliability appropriate for the mobility condition
Solution Approach 2:
The system dynamically adapts sidelink resource pool configuration based on real-time UE speed detection. The resource pool parameters (such as time intervals, resource periods) are adjusted according to the UE's mobility state, allowing the system to optimize between reliability and power consumption by matching reconfiguration frequency to actual movement conditions
2Reliability
If the UE performs frequent sidelink resource pool reconfigurations to avoid interference and collisions, then communication reliability is improved, but latency increases due to transmission interruptions
Solution Approach 1:
The patent reduces latency by changing resource pool parameters based on speed detection. For high-speed UEs, the system configures longer time intervals between sidelink transmissions and adjusts resource pool periods, reducing the frequency of reconfigurations and allowing continuous transmission without frequent interruptions, thus minimizing latency while maintaining appropriate reliability
Solution Approach 2:
The system performs preliminary speed detection and resource pool configuration adjustment before transmission interruptions occur. By detecting UE speed early and pre-configuring appropriate resource pool parameters, the system avoids the latency that would result from reactive reconfigurations during active transmissions
3Adaptability or versatility
If the UE uses sidelink resources from a base station-indicated resource pool, then resource allocation flexibility is improved, but device complexity increases due to reconfiguration management
Solution Approach 1:
The patent simplifies device complexity by using speed-based parameter changes to determine resource pool configuration. Instead of complex reconfiguration management, the UE simply detects its speed, compares it to thresholds, and applies pre-defined resource pool parameters appropriate for that speed range, reducing the computational and management complexity while maintaining adaptability to different mobility conditions
Data Source
AI summary
An apparatus includes a receiver configured to receive, from a base station, a control message indicating a sidelink resource pool. The apparatus further includes a transmitter configured to perform, after receiving the control message, a sidelink transmission using one or more sidelink resources. Based on a speed exceeding a threshold speed, the one or more sidelink resources include one of a first sidelink resource of the sidelink resource pool or a preconfigured sidelink resource. The one or more sidelink resources include the first sidelink resource based on the first sidelink resource being associated with a high speed flag. The one or more sidelink resources include the preconfigured sidelink resource based on a time interval since a previous sidelink transmission failing to exceed a threshold time interval and further based on the sidelink resource pool failing to indicate a resource associated with the high speed flag.