Sidelink Release Timer for V2X Connection Management
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Solution Overview
Problem
Current LTE sidelink technology lacks support for terminals to disconnect sidelink connections, which is essential for advanced vehicle-to-everything (V2X) services requiring low latency, high reliability, and large data volumes, such as self-driving and sensor extensions.
Innovation Solution
A sidelink release method is introduced, where a sidelink release timer is configured by a network side device or a terminal, allowing the terminal to automatically release a sidelink connection after a predetermined time or upon specific conditions, with the option to notify a higher layer or release the connection upon timer expiration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LTE sidelink broadcast mechanism is used, then communication coverage is provided, but quality of service requirements for advanced V2X services cannot be met
Solution Approach 1:
The patent introduces dynamic connection management for sidelink by implementing a release timer mechanism that allows connections to be automatically released after a predetermined time period. This dynamic approach enables the system to adapt connection states based on service requirements, transitioning from static broadcast mechanism to dynamic connection-oriented communication that can meet varying QoS demands of advanced V2X services.
Solution Approach 2:
The patent changes the communication parameter from broadcast mechanism to connection-oriented mechanism with configurable release timers. By introducing timer-based connection release parameters, the system can adjust connection duration and state according to specific service needs, enabling support for low latency and high reliability requirements of advanced V2X services while maintaining backward compatibility.
2Reliability
If sidelink connection is maintained continuously, then connection availability is ensured, but resource waste occurs without technical support for disconnection
Solution Approach 1:
The patent implements periodic connection management through a release timer mechanism that automatically releases sidelink connections after a predetermined time period. This periodic action allows the system to maintain connections only when needed, automatically disconnecting after the timer expires, thereby ensuring connection availability during active periods while preventing resource waste during inactive periods.
Solution Approach 2:
The release timer mechanism enables self-service connection management where the terminal autonomously releases sidelink connections based on predetermined time conditions without requiring network intervention. This self-service approach ensures that connections are automatically released when no longer needed, preventing resource waste while maintaining availability during active communication periods.
3Productivity
If connection release function is added to sidelink, then resource management efficiency is improved, but system complexity increases
Solution Approach 1:
The patent extracts the connection release function as a separate, independent mechanism from the existing sidelink framework. By introducing a dedicated release timer that operates independently, the system achieves efficient resource management through automatic connection release without significantly increasing overall system complexity, as the timer mechanism is a self-contained function.
Solution Approach 2:
The release timer mechanism serves multiple functions: it manages connection release, controls resource allocation, and supports different service requirements through configurable time periods. This multi-functional approach improves resource management efficiency across various V2X services without requiring separate mechanisms for each function, thereby limiting the increase in system complexity.
Data Source
AI summary
A sidelink release method includes: obtaining a sidelink release timer, where the sidelink release timer is configured or preconfigured by a network side device, or the sidelink release timer is configured by a second terminal or obtained by a second terminal from a network side configuration; starting or restarting the sidelink release timer after data is received and sent on a sidelink connection to the second terminal; and sending a sidelink connection release message to the second terminal or notifying a higher layer of the first terminal after the sidelink release timer expires.