Sidelink Resource Allocation Using UE Identifiers to Avoid Collisions
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Solution Overview
Problem
Current inter-UE resource allocation schemes in NR SL mode 2 are inefficient in meeting ultra-high reliability requirements due to the hidden node problem and lack of awareness of resource usage by the allocating UE, leading to collisions and overlapping issues.
Innovation Solution
A mechanism where the resource allocating UE collects a list of AS layer identifiers from the resource requesting UE to estimate its activities and avoid allocating conflicting or overlapping resources, using signaling with reduced overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the resource allocating UE autonomously selects resources without knowing the resource usage of other UEs, then the resource allocation process is simple and fast, but resource collisions and overlapping occur leading to low reliability
Solution Approach 1:
The patent implements a feedback mechanism where the resource requesting UE sends its resource usage information (including reserved resources and peer UE identifiers) back to the resource allocating UE. This feedback enables the allocating UE to make informed resource allocation decisions, preventing collisions and overlaps while maintaining autonomous operation without continuous network intervention.
Solution Approach 2:
The patent applies preliminary action by having the resource requesting UE proactively provide its resource usage information to the resource allocating UE before the actual resource allocation occurs. This advance information sharing allows the allocating UE to preclude potential conflicts in the resource selection process, ensuring reliable communication from the outset.
2Reliability
If the resource allocating UE collects detailed resource usage information from the resource requesting UE, then resource allocation reliability improves, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential information needed for reliable resource allocation - specifically, the identifiers of peer UEs and their associated resource usage patterns. By taking out only this critical subset of information rather than complete resource usage details, the patent achieves reliable collision avoidance while minimizing signaling overhead.
Solution Approach 2:
The patent applies partial action by collecting and processing only the necessary portion of resource usage information - specifically peer UE identifiers and their resource reservations - rather than complete detailed information. This partial information approach is sufficient to prevent collisions and overlaps while keeping signaling overhead manageable.
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for identifier (ID)-based inter-user equipment (UE) resource allocation (RA). A method may include receiving, at a first user equipment, a list of identifiers used for communication between a second user equipment and its one or more peer user equipment (UEs). The method may also include obtaining information of a first resource reserved for communication between the second user equipment and its one or more peer user equipment, based on the received list of identifiers. The method may further include determining a second resource for the second user equipment based on the obtained information of the first resource. In addition, the method may include allocating the second resource for sidelink communication of the second user equipment.