UE-Assisted Full Duplex Sidelink Feasibility Signaling
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Solution Overview
Problem
Current wireless communication systems face challenges in determining the feasibility of bidirectional full duplex sidelink transmissions between user equipment (UEs), which increases signaling overhead and latency, degrading network performance.
Innovation Solution
User equipment (UEs) inform the network node of sidelink full duplex feasibility based on self-interference measurements, allowing the network node to schedule bidirectional full duplex sidelink transmissions using recommended sidelink scheduling information, thereby reducing the need for the network node to collect performance metrics from each UE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the network node collects performance metrics from each UE to determine sidelink full duplex feasibility, then the scheduling accuracy is improved, but the signaling overhead and latency increase
Solution Approach 1:
The UE autonomously determines its own sidelink full duplex feasibility by measuring self-interference metrics (such as SINR) and generates the feasibility indication without requiring the network node to collect and process performance metrics from each UE. This self-service approach eliminates the signaling overhead and latency associated with the network node collecting metrics from multiple UEs, while still achieving accurate feasibility determination through the UE's direct measurements
2Measurement precision
If the network node collects performance metrics from each UE to determine sidelink full duplex feasibility, then the scheduling decision accuracy is improved, but the signaling overhead increases
Solution Approach 1:
The UE autonomously determines its own sidelink full duplex feasibility by measuring self-interference metrics (such as SINR) and generates the feasibility indication without requiring the network node to collect and process performance metrics from each UE. This self-service approach eliminates the signaling overhead and latency associated with the network node collecting metrics from multiple UEs, while still achieving accurate feasibility determination through the UE's direct measurements
3Device complexity
If the network node schedules bidirectional full duplex sidelink transmissions without UE-assisted feasibility indications, then the network control is simplified, but the transmission reliability decreases due to inadequate interference assessment
Solution Approach 1:
The UE provides feedback to the network node in the form of a feasibility indication based on its self-interference measurements. This feedback mechanism enables the network node to make informed scheduling decisions about bidirectional full duplex transmissions without directly collecting and processing detailed performance metrics from each UE. The feedback approach maintains network control simplicity while significantly improving transmission reliability by ensuring that the network node has accurate interference assessment information from the actual transmitting UEs
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may transmit, to a network node, an indication that a bidirectional full duplex sidelink transmission between the first UE and a second UE is feasible. The first UE may transmit, to the network node, sidelink scheduling information that is recommended for the bidirectional full duplex sidelink transmission. The first UE may receive, from the network node, downlink control information (DCI) that schedules the bidirectional full duplex sidelink transmission, the DCI being based at least in part on the sidelink scheduling information and the indication that the bidirectional full duplex sidelink transmission between the first UE and the second UE is feasible. The first UE may transmit, to the second UE, the bidirectional full duplex sidelink transmission. Numerous other aspects are described.