COT-Aware Autonomous Sensing for Sidelink Resource Selection
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing channel occupancy time (COT) in shared radio frequency bands for sidelink communications, particularly in unlicensed spectra, leading to inefficiencies in data transmission and potential collisions.
Innovation Solution
Implementing COT-aware autonomous sensing mechanisms that utilize channel-access gaps for sidelink transmissions, allowing user equipment (UE) to select resources based on channel-access gap availability, enabling efficient burst transmissions and COT sharing between UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional resource selection is used in shared radio frequency bands, then resource allocation is simple, but channel occupancy time management is inefficient and collisions occur
Solution Approach 1:
The system performs preliminary sensing of channel-access gaps before selecting resources for transmission. UEs monitor and identify available channel-access gaps in advance, storing this information for subsequent resource selection. This preliminary action allows the system to make informed resource selection decisions based on pre-acquired channel state information, improving transmission efficiency while managing complexity through structured advance preparation.
Solution Approach 2:
The system implements feedback mechanisms where UEs report channel-access gap availability and sensing results to the network and use this feedback for resource selection. The network provides feedback on resource allocation based on sensed channel conditions, and UEs adjust their transmission strategies based on this feedback. This closed-loop feedback system optimizes channel occupancy time management and reduces collisions while maintaining efficient data transmission.
2Quantity of substance
If channel occupancy time is extended for burst transmissions, then data transmission volume increases, but idle intervals increase reducing efficiency
Solution Approach 1:
The system dynamically adjusts channel occupancy time based on real-time channel conditions and traffic requirements. UEs can extend COT when channel conditions are favorable and traffic volume is high, while reducing COT when channels become congested or traffic decreases. This dynamic adjustment allows the system to maximize data transmission volume during favorable conditions while minimizing idle intervals and maintaining efficiency through adaptive response to changing channel states.
Solution Approach 2:
The system maintains continuous useful action by seamlessly transitioning between transmission bursts and channel sensing periods. Rather than having significant idle intervals between transmissions, the system continuously performs light sensing activities during potential idle periods and immediately transitions back to transmission when channel-access gaps become available. This continuity minimizes wasted time while allowing extended COT for burst transmissions when needed.
3Adaptability or versatility
If autonomous sensing is implemented for COT sharing, then resource utilization improves, but sensing and detection complexity increases
Solution Approach 1:
The autonomous sensing function is segmented into distinct modular components: channel monitoring module, gap detection module, sensing result processing module, and resource selection module. Each module handles a specific aspect of the sensing process independently. This segmentation allows the system to implement comprehensive COT sharing capabilities while managing complexity through modular design, where each segment can be optimized and maintained independently.
Solution Approach 2:
The system implements self-service autonomous sensing where UEs independently perform channel sensing, detect channel-access gaps, and make resource selection decisions without continuous network control. Each UE autonomously monitors its own channel conditions, senses available gaps, and determines its own transmission resources based on sensed information. This self-service approach enables flexible COT sharing among multiple UEs while reducing the sensing and detection burden on the network, as each UE handles its own sensing requirements.
Data Source
AI summary
Wireless communications systems and methods related to COT aware autonomous sidelink sensing are provided. A first user equipment (UE) selects at least a first resource from available resources in a sidelink resource pool within a shared radio frequency band. The selecting the first resource may be based on a channel-access gap preceding each resource of the available resources. The first UE further transmits, to a second UE using the selected first resource, one or more data blocks for a sidelink transmission.