Inter-Device Sidelink Communication With Single-Slot Collision Feedback
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Solution Overview
Problem
Existing communication systems face challenges in reducing resource collisions and improving resource selection efficiency and reliability in sidelink transmissions between user equipment devices, particularly when selecting resources for direct communication without a base station.
Innovation Solution
Devices implement methods to determine potential resource collisions by analyzing reference signal received power and sending collision messages to adjust resource reservations, utilize time windows for preferred resource selection, and employ periodic and contiguous partial sensing to optimize resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If devices use sidelink transmissions for direct communication without a base station, then communication autonomy and flexibility are improved, but resource collision probability increases
Solution Approach 1:
The patent implements preliminary resource sensing and collision detection before actual transmission. Devices perform sensing operations in advance to identify available resources and detect potential collisions with other devices, allowing them to select collision-free resources proactively rather than reacting after collisions occur.
Solution Approach 2:
The patent establishes feedback mechanisms where devices transmit collision messages to inform others of resource conflicts. This feedback loop enables devices to adjust their resource selections based on real-time information about channel conditions and ongoing transmissions, reducing collision probability in autonomous sidelink communications.
2Reliability
If devices perform comprehensive resource sensing and collision detection, then resource selection reliability is improved, but processing time and energy consumption increase
Solution Approach 1:
The patent applies partial sensing over the entire resource pool rather than requiring devices to sense every possible resource exhaustively. By performing sensing at strategic sampling points and using collision messages from other devices, the system achieves sufficient reliability without the computational burden of complete resource analysis.
Solution Approach 2:
The patent introduces collision messages as intermediary signals that convey resource availability information between devices. Instead of each device performing independent comprehensive sensing, collision messages act as mediators that share sensing results, reducing individual processing requirements while maintaining overall system reliability.
3Ease of manufacture
If devices use fixed resource allocation methods, then implementation simplicity is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent transitions from fixed resource allocation to dynamic resource selection. Devices dynamically determine available resources based on real-time channel conditions, collision messages, and sensing results. This dynamic approach maintains implementation simplicity through standardized collision detection procedures while significantly improving resource utilization efficiency through adaptive selection.
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.