Full Duplex Sidelink Self-Interference Measurement
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Solution Overview
Problem
Current sidelink communication technologies face challenges in managing self-interference during full-duplex operations, particularly in decentralized resource allocation modes, where simultaneous transmission and reception can lead to interference issues.
Innovation Solution
A method where user equipment (UE) transmits sidelink control information indicating a resource reservation for self-interference measurement, allowing for the exclusion of reserved resources from candidate resources for transmission and enabling self-interference management through autonomous resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex operation is implemented in sidelink communication, then resource utilization and spectral efficiency are improved, but self-interference between simultaneous transmission and reception deteriorates communication reliability
Solution Approach 1:
The patent applies preliminary action by performing self-interference measurements before actual full-duplex communication. The transmitting UE measures its own self-interference level on candidate resources and only selects resources where the self-interference is below a threshold, preventing interference-related reliability issues before they occur.
Solution Approach 2:
The patent implements feedback by having the transmitting UE report self-interference measurement results to the receiving UE. This feedback enables the receiving UE to adjust its reception parameters or request alternative resources, maintaining communication reliability despite full-duplex operation.
2Device complexity
If autonomous resource allocation is used, then device complexity and network overhead are reduced, but interference management capability deteriorates
Solution Approach 1:
The patent applies self-service by enabling UEs to autonomously perform self-interference measurements and select appropriate resources without network coordination. Each UE independently manages its own interference issues through measurement and reporting, reducing both device complexity and network overhead while maintaining interference management capability.
Solution Approach 2:
The patent uses the self-interference measurement report as an intermediary mechanism. This report serves as a mediator between the transmitting UE's autonomous resource selection and the receiving UE's interference experience, enabling indirect interference management without complex direct coordination.
3Measurement precision
If self-interference measurement resources are reserved, then measurement accuracy is improved, but available resources for actual transmission are reduced
Solution Approach 1:
The patent applies partial action by having the transmitting UE measure self-interference on only some candidate resources rather than all available resources. The UE selects a subset of candidate resources for measurement, and only excludes resources where self-interference exceeds the threshold, thereby maintaining measurement accuracy while preserving most available resources for transmission.
Data Source
AI summary
A sidelink device apparatus is disclosed. The apparatus may transmit, in a first transmission occasion, SCI indicating a resource reservation for a self-interference measurement in a second transmission occasion. The apparatus may transmit a signal, in the second transmission occasion. The apparatus may perform the self-interference measurement based on the signal in the second transmission occasion using at least a portion of resources indicated in the resource reservation.