Sidelink Carrier Selection for Fair Shared-Carrier Aggregation
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Solution Overview
Problem
In sidelink communications, the use of shared carriers by a first UE can negatively impact a second UE due to undetectable resource reservation information and cause congestion, necessitating improved carrier selection or reselection to enhance fairness and efficiency.
Innovation Solution
A method for determining candidate carriers based on conditions, including dedicated and shared sidelink carriers, to select or reselect carriers for sidelink transmission, incorporating inter-UE coordination and channel sensing to optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a first UE uses shared sidelink carriers for carrier aggregation to increase throughput and reliability, then the first UE achieves improved performance, but the second UE experiences negative impact due to undetectable resource reservation information and congestion
Solution Approach 1:
The first UE performs preliminary actions by transmitting resource reservation information on the shared sidelink carrier before actual data transmission. This allows the second UE to detect and identify the resources reserved by the first UE in advance, enabling the second UE to perform proper resource selection and avoid the reserved resources, thereby preventing congestion while allowing the first UE to utilize the shared carrier for improved throughput
2Productivity
If a first UE uses shared sidelink carriers for carrier aggregation to increase throughput and reliability, then the first UE achieves improved performance, but the second UE cannot detect the resource reservation information
Solution Approach 1:
The resource reservation information transmitted by the first UE on the shared sidelink carrier acts as an intermediary signal that bridges the communication between the first and second UEs. This information serves as a mediator that allows the second UE to detect and understand the resource allocation of the first UE, enabling proper resource selection without direct interaction between the UEs
3Reliability
If a first UE uses shared sidelink carriers for carrier aggregation, then the first UE achieves improved reliability, but resource allocation fairness is compromised
Solution Approach 1:
The transmission of resource reservation information on the shared sidelink carrier creates a feedback mechanism where the first UE informs the second UE about its resource usage. This feedback enables the second UE to adjust its resource selection accordingly, ensuring fair resource allocation between UEs while allowing the first UE to maintain improved reliability through carrier aggregation
Data Source
AI summary
Disclosed are methods, apparatuses, and systems for carrier selection or re-selection for sidelink carrier aggregation. The methods include: determining, by a user equipment (UE) in a first sidelink communication, based on a first condition, one or more first candidate carriers from among one or more dedicated sidelink carriers, the one or more dedicated sidelink carriers being dedicated for the first sidelink communication; determining, by the UE, based on a second condition, one or more second candidate carriers from among one or more shared sidelink carriers, the one or more shared sidelink carriers being shared by at least the first sidelink communication and a second sidelink communication; and selecting, by the UE, one or more sidelink carriers for a sidelink transmission from among at least one of: the one or more first candidate carriers or the one or more second candidate carriers.