Sidelink Resource Allocation via Sensing and Indication
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing sidelink transmission resources, particularly in reducing power consumption and enhancing reliability and latency for device-to-device communications, especially in scenarios with high channel busy ratios and battery-constrained devices.
Innovation Solution
A method where a first device performs sensing on a sidelink resource pool, determines sets of resources based on characteristics, and transmits signals to a second device indicating these resources, allowing the second device to select or exclude resources for sidelink transmission, thereby optimizing resource allocation and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If devices perform continuous sensing and resource selection for sidelink transmission, then transmission reliability improves, but power consumption increases
Solution Approach 1:
The first device performs sensing and determines resource sets in advance before actual transmission is needed. By pre-selecting and indicating resource sets to the second device, the system reduces the need for continuous real-time sensing and resource selection operations, thereby lowering power consumption while maintaining transmission reliability through pre-planned resource allocation
Solution Approach 2:
The first device acts as an intermediary by performing sensing on behalf of both devices and determining resource sets that accommodate both devices' transmission needs. This intermediary role eliminates the need for the second device to perform separate sensing operations, reducing overall power consumption while ensuring reliable resource allocation for both devices
2Device complexity
If devices select resources independently without coordination, then device complexity is reduced, but resource allocation efficiency and reliability deteriorate
Solution Approach 1:
The first device serves as an intermediary that performs centralized sensing and resource set determination for both devices. By consolidating the sensing and resource selection functions in one device, the system maintains low individual device complexity while achieving high resource allocation efficiency and reliability through coordinated resource set indication
Solution Approach 2:
The first device performs multiple functions including sensing, resource selection, and resource indication to both devices. This multi-functional approach allows the system to achieve efficient and reliable resource allocation without requiring complex independent resource selection mechanisms at each device
3Manufacturing precision
If more sensing operations are performed to improve resource selection accuracy, then resource allocation precision improves, but processing time and latency increase
Solution Approach 1:
The first device performs sensing operations in advance during a sensing window before the actual transmission time. By completing sensing and resource set determination beforehand, the system achieves accurate resource selection without adding latency to the actual transmission process, as the resource allocation is already decided when transmission occurs
Data Source
AI summary
A method and apparatus are disclosed from the perspective of a first device performing sidelink transmission. In one embodiment, the method includes the first device performing sensing on a first sidelink resource pool. The method further includes the first device determining one or more sets of resources based on one or more characteristics or one or more characteristic values associated with the sensing. The method also includes the first device transmitting a signal to at least a second device, wherein the signal indicates the one or more sets of resources and indicates the one or more characteristics or one or more characteristic values for the one or more sets of resources.