Sidelink Resource Selection for Contiguous Back-to-Back Transmission
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Solution Overview
Problem
Existing sidelink communication systems face challenges in efficiently selecting and excluding resources in unlicensed spectrum, particularly in ensuring contiguous resource selection for back-to-back transmissions, which is not adequately addressed in current standards.
Innovation Solution
A method and apparatus for resource reselection and exclusion that involves determining resource selection and sensing windows, performing resource exclusion based on sidelink control information, and selecting transmission resources from a set of consecutive time units, while considering RSRP thresholds and resource reservation periods to avoid collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resource exclusion is performed based on sensed sidelink control information in existing sidelink communication systems, then resource collision avoidance is improved, but contiguous resource selection for back-to-back transmissions is not ensured
Solution Approach 1:
The patent segments the resource exclusion process into two distinct stages: a first exclusion process that excludes resources based on sensed sidelink control information, and a second exclusion process that excludes resources that would prevent contiguous selection for back-to-back transmissions. This segmentation allows each process to address specific requirements independently, resolving the contradiction between collision avoidance and contiguous resource selection capability.
Solution Approach 2:
The patent performs preliminary action by determining a set of candidate resources that satisfy contiguous time unit requirements before final resource selection. By pre-identifying and marking resources that would interfere with back-to-back transmissions, the system ensures contiguous resource availability is preserved while maintaining collision avoidance through the sensing-based exclusion process.
2Adaptability or versatility
If resource selection is performed from individual time units, then resource flexibility is improved, but back-to-back transmission support deteriorates
Solution Approach 1:
The patent introduces a new dimension to resource selection by evaluating resources not just individually but in terms of their temporal contiguity relationships. By considering the time domain structure and identifying sequences of contiguous time units, the system maintains flexibility in resource selection while ensuring back-to-back transmission requirements are met through multi-dimensional resource evaluation.
Solution Approach 2:
The patent performs preliminary action by pre-identifying resources that would prevent contiguous selection and marking them for exclusion before final resource selection occurs. This advance preparation ensures that when resources are selected from the candidate set, contiguous time units are available for back-to-back transmissions, resolving the contradiction between flexibility and reliability.
3Device complexity
If resource exclusion is performed without considering future transmission slots, then processing complexity is reduced, but resource collision in subsequent transmissions increases
Solution Approach 1:
The patent applies preliminary action by determining Q time units corresponding to future slots based on the resource reservation period before final resource selection. This advance calculation allows the system to exclude resources that would cause collisions in subsequent transmissions without significantly increasing processing complexity, as the Q time units are determined through straightforward temporal mapping based on reserved parameters.
Solution Approach 2:
The patent enables self-service by using the resource reservation period information already present in the sensed sidelink control information to automatically determine the Q time units for future slot consideration. The system leverages existing reservation data to extend the exclusion horizon, reducing the need for additional complex processing while improving reliability in subsequent transmissions.
Data Source
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AI summary
A resource selection method and apparatus, a resource exclusion method and apparatus, a device, and a storage medium, which relate to the technical field of communications. The resource selection method comprises: after performing resource exclusion on a first resource set, selecting a transmission resource from the first resource set, wherein any resource in the first resource set is a first resource, and the first resource corresponds to N consecutive time units in a time domain, N being an integer greater than 1 (710). A candidate resource set obtained after resource exclusion is performed comprises resources which are continuous in a time domain, such that it is ensured that when a terminal device selects a transmission resource from the candidate resource set, the resources, which are continuous in the time domain, can be selected to support B2B transmission, thereby facilitating an improvement in the utilization rate of COT and facilitating competition for a channel by an SL-U user.