Sidelink Prioritization Scheme for Access Link Interference
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently prioritizing sidelink communications, leading to potential interference and reduced reliability in scenarios like vehicle-to-everything (V2X) and device-to-device (D2D) systems, where resource allocation and cancellation indications are not effectively managed.
Innovation Solution
Implementing a prioritization scheme at user equipment (UE) to determine whether to cancel or transmit sidelink communications based on overlapping resources and priority indications from base stations, using inter-UE and intra-UE prioritization to manage access link and sidelink communications effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resources are allocated for sidelink communications, then sidelink communication capability is improved, but interference with access link communications increases
Solution Approach 1:
The patent applies local quality by assigning different priority levels to different communications (access link vs. sidelink) and applying local cancellation decisions based on priority comparisons. The UE selectively cancels sidelink transmissions only in specific resource occasions where access link communications have higher priority, rather than applying a global cancellation policy.
Solution Approach 2:
The patent implements dynamic resource management by continuously monitoring priority indications from the network and adjusting transmission decisions in real-time. The cancellation indication mechanism allows the UE to dynamically switch between transmitting and canceling sidelink communications based on current network conditions and priority assignments.
2Productivity
If cancellation indications are implemented to manage resource conflicts, then resource allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by having the network pre-assign priority levels to different communications and pre-indicate potential resource conflicts through cancellation indications. This allows the UE to make deterministic cancellation decisions without complex real-time arbitration logic, simplifying the device complexity while maintaining efficient resource allocation.
Solution Approach 2:
The patent introduces priority indications and cancellation indications as intermediary signaling mechanisms between the network and UE. These intermediaries carry the necessary information for resource conflict resolution, allowing the complex prioritization logic to be implemented in the network rather than the UE, thereby reducing device complexity.
3Reliability
If sidelink transmissions are maintained despite resource overlaps, then sidelink communication reliability is improved, but interference with high-priority access link communications increases
Solution Approach 1:
The patent changes the transmission parameter (cancellation decision) based on priority parameter comparisons. When the network indicates higher priority for access link communications, the UE changes its sidelink transmission parameter from transmit to cancel, thereby reducing harmful interference while maintaining sidelink reliability when priorities allow.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described for prioritization of sidelink communications of a user equipment (UE) with one or more access link communications. A prioritization scheme may provide inter-UE and intra-UE prioritization that may be used to prioritize sidelink communications and one or more access link communications. Inter-UE prioritization may be used at the UE to determine whether to cancel all or a portion of a sidelink communication that uses resources indicated in a cancellation indication from a base station, or to transmit the sidelink communication irrespective of the cancellation indication. Intra-UE prioritization may be used at the UE to determine which of one or more access link communications or a sidelink communication is to be maintained or canceled in the event of overlapping resources between the access link and sidelink communications.