NR-V2X Relay Positioning for Remote UE Accuracy
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Solution Overview
Problem
Existing NR-V2X systems face challenges in efficiently providing network-based positioning, especially for remote UEs with degraded positioning performance, without requiring additional network expansion.
Innovation Solution
A network-based positioning method utilizing a relay UE for blind retransmissions in sidelink communication, involving configuring transmission channel resources, generating and transmitting signal groups, and measuring absolute position based on received positioning information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If relay UE is introduced to improve positioning performance for remote UEs, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
A relay UE is introduced as an intermediary node between the network and remote UEs to forward positioning signals. The relay UE receives positioning reference signals from the network and forwards them to remote UEs, enabling positioning measurement for UEs that cannot directly receive signals from the network, thereby improving positioning accuracy without requiring additional network infrastructure
Solution Approach 2:
The relay UE performs multiple functions including receiving positioning reference signals from the network, forwarding these signals to remote UEs, and participating in positioning measurement processes. This multi-functional approach allows a single device to serve both as an end user and as a positioning assistance node, reducing the need for dedicated infrastructure
2Reliability
If blind retransmissions are implemented in sidelink communication, then positioning reliability is improved, but loss of time increases
Solution Approach 1:
The system pre-configures transmission channel resources for blind retransmissions before actual positioning signal transmission. By preparing resource allocations in advance and establishing predetermined retransmission protocols, the system ensures that if initial positioning signals are not successfully received, retransmissions can occur immediately using pre-allocated resources, improving reliability while minimizing additional time loss
Solution Approach 2:
The blind retransmission mechanism incorporates feedback loops where receiving UEs monitor for successful reception of positioning signals. If signals are not successfully received within expected time windows, the system triggers automatic retransmissions with feedback information about the failed reception, allowing the system to adapt and retry until successful positioning data is obtained
Data Source
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AI summary
The present disclosure relates to a method for performing blind retransmission in a sidelink communication system, and a device therefor. According to an aspect, a method for performing blind retransmission by a transmission terminal in a sidelink communication system may comprise the steps of configuring a transmission channel resource for the blind retransmission; generating a first signal group for sidelink positioning on the basis of the configured transmission channel resource; transmitting the generated first signal group via a sidelink; as a response to the first signal group, receiving a second signal group from a reception terminal via the sidelink; and measuring an absolute location of the transmission terminal on the basis of positioning information included in the second signal group.