Sidelink Resource Conflict Detection via Early Coordination Signaling
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Solution Overview
Problem
The container or signaling format for inter-UE coordination scheme 2 in sidelink transmission is undetermined, specifically for indicating the presence of expected or potential resource conflicts on resources indicated by UE-B's sidelink control information.
Innovation Solution
A method where a first device determines a resource from a resource set configured for transmission of coordination information, indicating the presence or absence of collisions on a set of resources, with the first slot for the determined resource being earlier than the second slot by a number of slots less than a threshold, and transmits this information to a second device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coordination information is transmitted using inter-UE coordination scheme 2 to indicate resource conflicts, then resource conflict detection capability is improved, but the signaling format and container structure remain undetermined, leading to implementation complexity
Solution Approach 1:
The coordination information is segmented into two distinct parts: a response indicator field that indicates whether a resource conflict was detected, and a resource indication field that specifies the conflicting resource. This segmentation allows the signaling format to be structured and implementable while maintaining full resource conflict detection capability.
2Loss of time
If coordination information is transmitted in the same slot as the resource it refers to, then real-time feedback is achieved, but resource conflicts may occur between the coordination information transmission and the indicated resource transmission
Solution Approach 1:
The patent determines the coordination information transmission resource in advance, before the actual transmission occurs. By selecting a resource from a configured set that is time-aligned with the indicated resource, the system prepares the feedback mechanism without causing conflicts, achieving both timely feedback and conflict avoidance.
3Reliability
If a threshold on the number of slots between coordination information transmission and resource indication is imposed, then resource conflict probability is reduced, but feedback timeliness may be affected
Solution Approach 1:
The patent changes the parameter of slot offset to be within a specific threshold range. By configuring the number of slots between the coordination information transmission and the indicated resource to be less than a threshold, the system optimizes the balance between avoiding resource conflicts and maintaining feedback timeliness.
Data Source
AI summary
Embodiments of the present disclosure relate to methods, devices and computer readable media for communication. A first device determines a resource from a resource set configured for transmission of coordination information, the coordination information indicating the presence or absence of a collision on a set of resources to be used by a second device, a first slot for the determined resource being earlier than a second slot for the set of resources by a number of slots, the number of slots being less than a threshold number. Then the first device transmits the coordination information to the second device on the determined resource. Upon reception of the coordination information, the second device determines whether the set of resources are available. In this way, the coordination information may be transmitted in proper resources, and thus inter-UE coordination may be enhanced and resource utilization may be improved.