NR-LTE Sidelink Inter-UE Coordination for Resource Collision Avoidance
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently and reliably managing resource allocation for co-channel coexistence between NR sidelink and LTE sidelink, leading to potential collisions and interference.
Innovation Solution
Introduce enhanced inter-UE coordination schemes where a first UE senses and measures resources in both NR and LTE sidelink pools, determines potential collisions based on RSRP thresholds, and transmits an IUC indication signal to assist second UEs in adjusting their resource reservations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If NR sidelink and LTE sidelink share the same channel resources, then spectrum utilization is improved, but resource collisions and interference increase
Solution Approach 1:
The patent implements sensing mechanisms where UEs perform preliminary detection of channel resources before transmission. The first UE senses resources in both NR and LTE sidelink pools to identify potential collisions before actual transmission occurs, allowing proactive avoidance of resource conflicts while maintaining efficient spectrum sharing
Solution Approach 2:
The patent establishes feedback loops where UEs transmit sensed resource information and collision indicators to coordinating UEs. The first UE provides feedback about detected LTE resources to the second UE, enabling dynamic resource adjustment and collision avoidance while preserving high spectrum utilization
2Adaptability or versatility
If UEs autonomously select sidelink resources in Mode 2, then scheduling flexibility is improved, but resource allocation efficiency deteriorates due to lack of centralized coordination
Solution Approach 1:
The patent introduces an intermediary coordination mechanism where the first UE acts as a sensing UE that collects resource information from multiple sources including LTE sidelink transmissions and NR sidelink reservations. This intermediary UE processes and shares collision information with other UEs, enabling distributed UEs to achieve coordinated resource allocation that maintains both autonomy and efficiency
Solution Approach 2:
The patent combines autonomous UE resource selection with collaborative sensing and information sharing. UEs merge their individual resource selections with collective sensing data from the network, allowing each UE to maintain scheduling flexibility while benefiting from group-level resource optimization through shared collision information
Data Source
AI summary
The present disclosure is related to IUC schemes under the co-channel coexistence of NR sidelink and LTE sidelink and to the approaches to determine the potential collision and transmit an IUC indication signal notifying the determination of the potential collision. In one aspect, a first UE capable of both LTE sidelink and NR sidelink can be used as an assisting UE to coordinate NR and LTE sidelink transmissions and receptions of various UEs including a second UE as an assisted UE after receiving a resource reservation signal from the second UE. By introducing enhanced conflict determination and transmission scheme to the co-channel coexistence NR sidelink and LTE sidelink, flexibility, efficiency, and reliability of the sidelink communication are improved.