NR V2X Sidelink Resource Reservation for Low-Latency Reliability
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently performing sidelink communication for vehicle-to-everything (V2X) scenarios, particularly in resource reservation for NR-based V2X communication, which is crucial for applications like vehicle platooning, advanced driving, and remote driving, and extended sensors, where latency and reliability are critical.
Innovation Solution
A method and apparatus for performing resource reservation in NR V2X communication, including mechanisms for efficient sidelink communication between UEs, such as resource allocation modes, synchronization signals, and bandwidth part configurations, enabling effective transmission and reception of V2X messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resource reservation is implemented in NR V2X communication, then reliability and latency performance are improved, but device complexity increases
Solution Approach 1:
The patent implements resource reservation by having the transmitting UE advance reservation information about future transmission resources to the receiving UE before the actual transmission occurs. This preliminary action allows the receiving UE to prepare reception settings in advance, ensuring reliable resource allocation and meeting latency requirements without requiring complex real-time negotiation mechanisms.
2Productivity
If resource reservation information is transmitted through SCI, then resource allocation efficiency is improved, but information loss occurs when SCI size is limited
Solution Approach 1:
The patent segments the resource reservation information transmission into two parts: first, essential reservation information is conveyed through the SCI (Sidelink Control Information) field with limited size; second, additional or updated reservation information is transmitted through subsequent messages from the transmitting UE to the receiving UE. This segmentation allows efficient initial resource allocation while preventing information loss through complementary information transmission.
3Reliability
If sensing-based resource selection is used, then resource collision is reduced, but processing time increases
Solution Approach 1:
The patent implements preliminary resource selection by having the transmitting UE perform sensing and resource determination in advance, before the actual transmission time. The UE selects and reserves resources based on pre-configured parameters and preliminary sensing results, reducing the processing time required during transmission while maintaining effective collision avoidance through the reservation mechanism.
Data Source
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AI summary
According to one embodiment of the present disclosure, provided is a method by which a first apparatus performs sidelink communication. The method may comprise the steps of: determining a first sidelink transmission resource for a first sidelink transmission to a second apparatus; triggering allocation of a second sidelink transmission resource for a second sidelink transmission to the second apparatus; determining the second sidelink transmission resource on the basis of the triggering; and on the basis of at least one of the first sidelink transmission resource and the second sidelink transmission resource, transmitting, to the second apparatus, at least one of at least one first PSCCH, at least one first PSSCH, at least one second PSCCH, and at least one second PSSCH.