Sidelink Resource Sharing Using Skip-Probability Signaling
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Solution Overview
Problem
Wireless communications systems face challenges in efficiently utilizing sidelink resources configured for initial and retransmission transmissions, leading to resource waste when these resources are not utilized due to the absence of data to transmit or positive acknowledgments.
Innovation Solution
User equipment (UE) signals an indication of the probability of using or skipping scheduled sidelink resources, allowing for the dynamic utilization of initially allocated but unutilized resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shared sidelink resources are allocated for initial and retransmission transmissions, then transmission reliability is improved, but resource utilization efficiency deteriorates due to unutilized occasions
Solution Approach 1:
The first UE performs preliminary action by transmitting an indication of probability before the actual transmission occasions. This indication signals the likelihood of skipping initial or retransmission occasions, allowing second UEs to prepare and potentially utilize the resources in advance, thereby improving resource utilization while maintaining transmission reliability through probabilistic resource sharing
Solution Approach 2:
The patent introduces dynamic resource utilization where the allocation of sidelink resources transitions from static to dynamic. By using probability indications, the system allows flexible adaptation of resource usage based on real-time conditions. Second UEs can dynamically adjust their transmission behavior based on the probability indications received from first UEs, optimizing resource utilization while preserving reliability through conditional access
2Reliability
If transmission occasions are scheduled for retransmission, then communication reliability is improved, but time efficiency deteriorates due to wasted retransmission opportunities
Solution Approach 1:
The system performs preliminary action by having UEs indicate their probability of skipping retransmission occasions in advance. This allows the network and other UEs to optimize time allocation by knowing beforehand when retransmission resources will be needed or can be skipped, thereby reducing time waste while maintaining communication reliability through targeted retransmission scheduling
Solution Approach 2:
The patent changes the parameter of resource allocation from fixed to probabilistic. By using probability indications for retransmission occasions, the system optimizes time efficiency dynamically. Second UEs can adjust their transmission timing based on these probability parameters, reducing idle time and wasted retransmission opportunities while preserving communication reliability through conditional retransmission based on actual channel conditions
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for enhancing resource utilization. An example method, performed at a first user equipment (UE), includes receiving sidelink configuration information configuring the first UE with at least initial transmission occasions for initial sidelink transmissions using shared sidelink resources and transmitting a first indication, to at least a second UE that uses the shared sidelink resources, of at least one probability that the first UE will skip at least one of the initial transmission occasions or one or more retransmission occasions scheduled for retransmission of an initial transmission.