Coordinated Sidelink Communication Through Conflict Indications
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Solution Overview
Problem
Existing sidelink communication networks face conflicts and interference due to simultaneous resource allocation of sidelink transmissions, leading to reduced reliability and missed transmissions, particularly in half-duplex scenarios.
Innovation Solution
A user equipment (UE) detects conflicts between sidelink transmissions and transmits conflict indications to involved UEs or network entities, allowing for resource reallocation and cancellation of conflicting transmissions, thereby coordinating sidelink communication and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs autonomously select sidelink resources or base station allocates resources for sidelink communication, then sidelink communication can be established, but conflicts and interference occur when multiple transmissions are scheduled on overlapping resources within the same slot
Solution Approach 1:
The patent applies preliminary action by detecting resource conflicts before sidelink transmissions occur. The method identifies overlapping time-frequency resources scheduled for different sidelink transmissions in advance, allows coordinating UEs to exchange conflict indications, and resolves conflicts through resource reselection or transmission cancellation before the actual transmissions take place, thereby preventing interference rather than mitigating it after occurrence
Solution Approach 2:
The patent implements feedback mechanisms where receiving UEs monitor resource reservations from transmitting UEs and provide feedback when conflicts are detected. The conflict indication messages serve as feedback that inform transmitting UEs about resource overlaps, enabling them to adjust their resource selection. This feedback loop continues until conflicts are resolved, ensuring reliable sidelink communication by iteratively improving resource allocation based on network conditions
2Productivity
If multiple sidelink transmissions are scheduled simultaneously in half-duplex scenarios, then resource utilization increases, but transmission conflicts and missed transmissions increase
Solution Approach 1:
In half-duplex scenarios, the patent uses feedback mechanisms where UEs monitor resource reservations and transmit conflict indications when detecting overlaps. This feedback enables coordinating UEs to identify and resolve conflicts through resource reselection or transmission cancellation, maintaining high resource utilization while preventing missed transmissions caused by simultaneous conflicting transmissions in the same slot
Solution Approach 2:
The patent applies preliminary action by detecting and resolving resource conflicts before half-duplex transmission conflicts occur. By identifying overlapping resources in advance and coordinating through conflict indication exchange, the system prevents transmission failures while maintaining efficient resource utilization in half-duplex scenarios
Data Source
AI summary
Aspects relate to techniques for sidelink transmissions scheduled by network entities. A UE may receive a resource reservation message from a transmitting UE indicating resources granted by a network entity for a first sidelink transmission. The UE may detect a conflict between the first sidelink transmission and a second sidelink transmission and transmit a conflict indication in response to detecting the conflict. The UE may transmit the conflict indication to the transmitting UE or to the network entity. In some examples, the transmitting UE receiving the conflict indication may report the conflict to the network entity.