Sidelink Carrier Aggregation Coordination for UE Collision Avoidance
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Solution Overview
Problem
Current wireless communication systems lack effective inter-UE coordination in sidelink carrier aggregation (SL CA), which is crucial for optimizing resource allocation and enhancing communication efficiency, especially in scenarios involving vehicle-to-everything (V2X) and device-to-device (D2D) interactions.
Innovation Solution
Implementing inter-UE coordination mechanisms, including inter-UE coordination request and information exchange via MAC CEs, to facilitate efficient resource allocation and management in SL CA, leveraging existing 3GPP standards for NR V2X communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple UEs perform SLS simultaneously without coordination, then channel occupancy is improved, but collision probability increases
Solution Approach 1:
The patent applies preliminary action by having UEs perform clear channel assessment (CCA) and select time resources for SLS transmissions before actual data transmission occurs. This advance planning and coordination prevents collisions by ensuring that multiple UEs do not transmit simultaneously on the same resources, thus maintaining high channel occupancy while reducing collision probability.
2Reliability
If UEs use different time resources for SLS, then collision probability is reduced, but coordination complexity increases
Solution Approach 1:
The patent applies self-service by enabling UEs to autonomously perform clear channel assessment (CCA) and autonomously select appropriate time resources for their SLS transmissions based on detected channel conditions and previously detected SLS transmissions. This self-organizing mechanism reduces coordination complexity while maintaining low collision probability, as each UE independently makes decisions without requiring complex centralized coordination.
3Productivity
If UEs transmit SLS continuously, then channel occupancy is improved, but interference to other signals increases
Solution Approach 1:
The patent applies periodic action by organizing SLS transmissions in periodic synchronization bursts rather than continuous transmission. UEs transmit SLS in scheduled time resources within periodic intervals, which maintains high channel occupancy during active transmission periods while providing quiet periods that reduce interference to other signals and allow for clear channel assessment and coordination.
Data Source
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AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure provides a Method and apparatuse for inter-user equipment (UE) coordination in sidelink (SL) carrier aggregation (CA) in a wireless communication system. A method comprises: receiving, from a base station (BS), configuration information about multiple SL carriers for a SL CA operation; determining whether a SL radio link failure (RLF) is detected for a SL carrier among the multiple SL carriers, and starting a timer for the SL carrier based on a determination that the SL RLF is detected, wherein an activation or a deactivation of the SL carrier is determined based on a status of the timer.