Sidelink Coordination Resource Selection for UE Power Reduction
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently selecting resources for sidelink coordination information requests, leading to increased blind decoding attempts and resource collisions, which affect the performance of sidelink inter-UE coordination and consume excessive power.
Innovation Solution
User equipment (UE) is configured to select resources for sidelink coordination information requests by sensing channel availability, using random selection, indexing based on UE identifiers, or resource assignments, thereby minimizing blind decoding attempts and reducing collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UE transmits sidelink coordination information request messages in all configured resources, then resource utilization is maximized, but blind decoding attempts and power consumption increase
Solution Approach 1:
The patent changes the parameter of resource selection from exhaustive transmission to selective transmission based on UE identifiers. Each UE is assigned specific resources from the configured set using indexing methods (e.g., resource index = UE_ID mod N), thereby reducing the number of resources each UE must monitor and transmit on, which directly reduces power consumption while maintaining overall system resource utilization.
2Ease of operation
If UE selects resources randomly from the configured set, then resource selection is simple, but resource collisions increase
Solution Approach 1:
The patent applies local quality by making resource selection UE-specific rather than uniform across all UEs. Each UE uses its unique identifier (such as C-RNTI, I-RNTI, or other UE-specific parameters) to determine a specific resource or subset of resources from the configured set. This differentiated approach maintains operational simplicity while significantly reducing collisions compared to random selection.
Solution Approach 2:
The patent changes the resource selection parameter from random choice to deterministic selection based on UE identifiers. By using indexing functions (e.g., resource index = f(UE_ID, configuration parameters)), the system transforms the selection process into a predictable, collision-minimizing mechanism while keeping the implementation simple.
3Reliability
If UE monitors all configured resources for request messages, then no coordination information is missed, but blind decoding attempts increase
Solution Approach 1:
The patent applies local quality by making the monitoring set UE-specific. Each receiving UE determines which transmitted resources to monitor based on its own identifier and the resource configuration. For example, if resource index = UE_ID mod N, then UE with identifier X only needs to monitor resources with indices matching that pattern, dramatically reducing blind decoding attempts while ensuring it receives all messages intended for it.
4Productivity
If multiple UEs use the same resource configuration, then resource allocation is efficient, but resource collisions increase
Solution Approach 1:
The patent resolves this contradiction by making resource allocation UE-specific through local quality. While all UEs share the same resource configuration parameters (resource pool, time/frequency resources), each UE actually uses a distinct subset determined by its identifier. This allows efficient overall resource allocation while preventing collisions through differentiated local resource usage.
Solution Approach 2:
The patent segments the shared resource configuration into UE-specific subsets. The resource configuration is divided and assigned to different UEs based on their identifiers, creating a segmented allocation scheme that maintains overall efficiency while eliminating collisions through spatial separation in the resource domain.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration of a set of resources for sidelink coordination information requests. The UE may transmit a sidelink coordination information request message in at least one resource selected from the set of resources for sidelink coordination information requests. Numerous other aspects are provided.