Sidelink Resource Selection and Collision Detection for Device Communication
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Solution Overview
Problem
Existing communication systems face challenges in reducing resource collisions and improving resource selection and reliability in sidelink communications between devices, particularly in scenarios where devices select less ideal resources, leading to interference and reduced efficiency.
Innovation Solution
Devices employ methods to determine potential resource collisions by analyzing reference signal received power and sending collision messages to adjust resource reservations, utilize preferred and non-preferred resource lists, and apply periodic and contiguous partial sensing to optimize resource selection for aperiodic transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If devices use sidelink transmissions to communicate with other devices, then communication capability is improved, but resource collisions and interference increase
Solution Approach 1:
The patent applies preliminary action by having devices sense resources and determine candidate resources before actual transmission occurs. The first device performs sensing in a first time window to identify candidate resources, and the second device performs sensing in a second time window. This preliminary resource selection and collision detection before transmission helps prevent resource collisions and improves communication reliability.
Solution Approach 2:
The patent implements feedback mechanisms where devices exchange information about resource availability and collision status. The first device sends first information indicating collision status with second information, and the second device sends second information indicating collision status with third information. This feedback loop enables devices to adjust their resource selection dynamically, reducing collisions while maintaining communication capability.
2Reliability
If devices perform comprehensive resource sensing and collision detection, then collision avoidance is improved, but power consumption increases
Solution Approach 1:
The patent applies partial action by having devices perform sensing only in specific time windows rather than continuously. The first device senses in a first time window and the second device senses in a second time window, which are partial portions of the overall resource selection period. This partial sensing approach reduces power consumption while still providing sufficient collision detection capability.
Solution Approach 2:
The patent segments the resource selection process into distinct time windows for different devices. The first time window is assigned to the first device for initial candidate resource identification, and the second time window is assigned to the second device for further verification. This temporal segmentation allows each device to sense only when needed, reducing overall power consumption while maintaining collision avoidance reliability.
Data Source
AI summary
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for communications between user equipment. One of the methods includes receiving, by a first device and from a second device, sidelink control information indicating a resource reservation for a single-slot resource for the second device to use to communicate with the first device; determining, by the first device and based at least in part on the sidelink control information, whether a potential resource collision exists when the first device is scheduled to communicate with another device using the single-slot resource or when the single-slot resource is reserved by another device; and in response to determining that the potential resource collision exists, sending, by the first device and within a predetermined number of slots from a reference slot, a collision message to cause the second device to determine another single-slot resource to use to communicate with the first device.