Sidelink Resource Coordination for UE Collision Avoidance
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Solution Overview
Problem
Existing communication technologies lack detailed conditions for determining when to transmit inter-UE coordination information, how to determine its content, and how to handle received information for sidelink (SL) transmission coordination between user equipment (UEs).
Innovation Solution
A UE receives coordination information indicating a resource set for SL transmission, determining target resources based on measured power, reception time, and channel status to avoid potential collisions, and transmits coordination information based on conditions such as channel busy ratio, time gaps, and priority levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coordination information is transmitted between UEs for SL transmission, then resource selection reliability is improved, but device complexity and processing overhead increase
Solution Approach 1:
The coordination information is segmented into multiple components including resource set indications, collision status indicators, and preference information. Each component is processed and transmitted separately through specific signaling mechanisms, reducing the complexity of handling a single large information block while improving reliability through structured data organization.
Solution Approach 2:
Coordination information is transmitted and processed before actual SL resource allocation and transmission occurs. UEs perform sensing, identify potential collisions, and exchange coordination information in advance, allowing them to pre-determine resource sets and avoid collisions before they happen, thereby improving reliability without adding complexity during actual transmission.
2Measurement precision
If detailed coordination information is exchanged between UEs, then resource selection accuracy is improved, but loss of time for information exchange increases
Solution Approach 1:
Only the most critical coordination information elements are extracted and transmitted between UEs, such as resource set preferences, collision status, and priority indicators. Non-essential detailed information is omitted or inferred, reducing information exchange time while maintaining sufficient accuracy for reliable resource selection through the extracted key parameters.
Solution Approach 2:
UEs perform partial sensing on a subset of resources rather than complete sensing of all possible resources. This partial action provides sufficient information for accurate resource selection in practice while significantly reducing the time required for information gathering and exchange compared to exhaustive sensing approaches.
3Extent of automation
If UEs perform sensing and resource selection autonomously, then device autonomy is improved, but resource collisions increase
Solution Approach 1:
UEs autonomously perform sensing and resource selection based on feedback from received coordination information from other UEs. The coordination information provides feedback about resource availability, collision status, and preferred resource sets, enabling autonomous UEs to make informed decisions that reduce collisions while maintaining device autonomy and independence.
Solution Approach 2:
Through autonomous sensing and processing of coordination information, UEs identify potential resource collisions in advance and take preliminary anti-action by selecting alternative resources from indicated resource sets. This preliminary anti-action prevents collisions before they occur while allowing each UE to maintain full autonomy in its resource selection decisions.
Data Source
AI summary
Embodiments of the present disclosure relate to sidelink transmission coordination. According to embodiments of the present disclosure, a processor of a user equipment (UE) configured to perform operations comprising: receiving, via a transceiver of the UE and from a second UE, coordination information concerning a transmission from the UE. The coordination information indicates a resource set preferred for the UE to perform resource selection. The operations further comprise determining at least one target resource for the transmission based on the resource set and at least one of the following: measured power of a signal associated with a resource in the resource set, reception time of the coordination information, and a reception scheduled for the UE on a resource in the resource set.