Sidelink Carrier Aggregation Resource Selection Avoiding Half-Duplex Conflicts
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for resource selection in sidelink carrier aggregation (CA) face challenges in avoiding the half-duplex issue, where simultaneous transmission and reception can occur due to overlapping resources, leading to inefficiencies in wireless communication.
Innovation Solution
The proposed solution involves excluding resources from the candidate set for a carrier if they overlap in time domain with the Physical Sidelink Feedback Channel (PSFCH) resources associated with other carriers, based on priority thresholds and specific criteria, to ensure that transmission and reception do not occur simultaneously, thereby avoiding the half-duplex issue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resources are selected independently per carrier without considering PSFCH overlap, then resource selection flexibility is improved, but half-duplex conflicts occur due to simultaneous transmission and reception
Solution Approach 1:
The resource selection process is segmented into two distinct phases: first selecting resources on the first carrier, then selecting resources on the second carrier while excluding those that overlap with PSFCH resources. This segmentation allows independent optimization of each carrier's resource selection while preventing half-duplex conflicts through the exclusion mechanism.
Solution Approach 2:
PSFCH resources are determined in advance before resource selection on the second carrier. By knowing the PSFCH resource locations beforehand, the system can proactively exclude overlapping resources from the candidate set, preventing half-duplex conflicts before they occur rather than resolving them after the fact.
2Reliability
If PSFCH resources are excluded from candidate set, then half-duplex reliability is improved, but resource selection options are reduced
Solution Approach 1:
The system dynamically adjusts the candidate resource set parameters based on PSFCH resource locations. By modifying the exclusion criteria and candidate set composition according to the specific PSFCH configuration, the system maintains reliability while optimizing the available resource options for each transmission scenario.
Data Source
AI summary
Methods and apparatuses for resource selection of sidelink CA are disclosed. A method of a user equipment (UE) comprises: excluding, from a candidate resource set for a first carrier, resources based on reception of Physical Sidelink Feedback Channel (PSFCH) resource(s) on the first carrier or on a second carrier and transmission of selected resource(s) on the second carrier; and selecting, from the candidate resource set in which the resources are excluded at least based on reception of PSFCH resource(s) on the first carrier or on the second carrier and transmission of selected resource(s) on the second carrier, resources on the first carrier for transmission.