Sidelink Sensing Report Timing for Resource Allocation
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Solution Overview
Problem
In sidelink transmission, existing methods face challenges in efficiently determining and reporting available resources for Physical Sidelink Shared Channel (PSSCH)/Physical Sidelink Control Channel (PSCCH) transmission, particularly in resource allocation mode 2, where the UE needs to select suitable resources within a limited time frame and accurately report sensing results.
Innovation Solution
A method where a terminal device performs an additional sensing procedure within a first sensing window after a first time slot, generates a sensing report, and provides it to a higher layer at a second time slot determined based on reference slots associated with the candidate resources, allowing for timely and accurate reporting of available resources for sidelink transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the UE determines candidate resources in slot n based on initial sensing, then the resource selection can be made quickly, but the sensing results may be outdated and inaccurate for transmission opportunities occurring later
Solution Approach 1:
The patent performs an additional sensing procedure in advance before the scheduled transmission opportunity, specifically in slot n-Ta where Ta is determined based on the resource reservation interval. This preliminary sensing action ensures that the sensing results are fresh and accurate for the upcoming transmission, resolving the contradiction between quick resource selection and accurate sensing by proactively updating the channel conditions before they are needed for transmission decisions
Solution Approach 2:
The patent implements a feedback mechanism where the UE generates a sensing report based on the additional sensing procedure and provides it to the higher layer at a determined second time slot. This feedback loop ensures that updated sensing information is communicated back to the resource selection algorithm, allowing the system to adapt to changing channel conditions and maintain accurate resource selection even with time delays
2Measurement precision
If the UE performs additional sensing procedure after slot n, then the sensing accuracy is improved, but the complexity of the resource allocation process increases
Solution Approach 1:
The additional sensing procedure is performed in advance at slot n-Ta rather than continuously or repeatedly, which limits the additional complexity to a single predetermined sensing opportunity. This preliminary action approach improves sensing accuracy without requiring ongoing complex sensing operations, as the sensing is triggered once based on the resource reservation interval before the transmission opportunity
Solution Approach 2:
The patent dynamically adjusts the timing of the additional sensing procedure based on the resource reservation interval. The second time slot for providing the sensing report is determined based on at least one reference slot associated with the set of candidate resources, allowing the system to adapt the sensing frequency and timing to the specific transmission requirements, thereby managing complexity while maintaining accuracy
3Measurement precision
If the sensing report is provided at a determined second time slot based on reference slots, then the reporting is timely and accurate, but the scheduling flexibility is reduced
Solution Approach 1:
The patent employs dynamic time slot determination for providing the sensing report, where the second time slot is determined based on at least one reference slot associated with the set of candidate resources. This dynamic approach allows the system to adapt the reporting timing to the specific resource allocation pattern and transmission requirements, maintaining timing accuracy while preserving一定的 scheduling flexibility through reference to the actual candidate resource timing
Data Source
AI summary
Embodiments of the present disclosure relate to devices, methods, devices and computer readable storage media for sensing procedure in sidelink transmission. The method comprises performing a sensing procedure for a set of candidate resources associated with a sidelink transmission within a first sensing window after a first time slot; generating a sensing report at least based on the sensing procedure; and providing the sensing report from a physical layer to a higher layer at a second time slot determined based on at least one reference slot associated with the set of candidate resource. In this way, the sensing result of a sensing procedure after the sensing trigger slot can be reported.