V2X Terminal Low Latency Communication via Exceptional Resource Pool
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In V2X communication systems, transmission latency occurs due to radio link failures (RLF) as terminals are unable to use exceptional resource pools until a timer expires, which can lead to unsatisfactory performance in Ultra-Reliable and Low-Latency Communications (URLLC) services.
Innovation Solution
A method where a terminal requests a low-latency communication service, receives a radio link failure triggering condition, and selects a resource from an exceptional resource pool upon detecting a radio link issue, allowing communication to continue until the timer expires, and optionally configures a connection with a secondary base station during this period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal waits for the timer to expire before using the exceptional resource pool, then the radio link failure procedure is completed correctly, but the transmission latency increases and URLLC service requirements are not met
Solution Approach 1:
The terminal performs preliminary actions by selecting resources from the exceptional resource pool and configuring connections with secondary base stations before the timer expires. This allows the terminal to prepare alternative communication paths in advance, enabling continuous operation during radio link failures without waiting for the timer to complete, thus reducing transmission latency while maintaining procedure correctness.
2Loss of time
If the terminal uses the exceptional resource pool before the timer expires, then the transmission latency is reduced, but the radio link failure procedure may not be completed correctly
Solution Approach 1:
The terminal maintains continuous useful action by simultaneously performing multiple operations: selecting resources from the exceptional resource pool, configuring connections with secondary base stations, and monitoring the timer expiration. This continuous multi-tasking ensures that both latency reduction and procedure correctness are achieved without interruption or incomplete actions.
3Loss of time
If the terminal configures connection with secondary base station during the duration, then the connection configuration is completed faster, but the device complexity increases
Solution Approach 1:
The terminal performs preliminary connection configuration actions with secondary base stations during the duration before the timer expires. By preparing these connections in advance, the terminal reduces the overall connection configuration time and ensures faster failover, while the complexity is managed through pre-established configuration templates and protocols.
Data Source
AI summary
An operation method of a terminal in a vehicle-to-everything (V2X) communication system may include: transmitting an indicator requesting provision of a low-latency communication service to a first base station; receiving from the first base station a radio link failure (RLF) triggering condition configured according to requirements of the low-latency communication service; measuring a radio link between the terminal and the first base station based on the RLF triggering condition; and in response to detecting a problem of the radio link, selecting a resource within an exceptional resource pool indicated by the first base station, and performing communication with the first base station using the selected resource during a duration beginning when the problem of the radio link is detected until a timer used for declaring an RLF expires.