Sidelink Access Control for V2X Congestion Management
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Solution Overview
Problem
Current LTE sidelink technologies face congestion issues in supporting advanced V2X services with strict quality of service (QoS) requirements for delay and reliability, particularly in high-density scenarios, as they lack effective access control mechanisms for resource allocation between terminals.
Innovation Solution
A sidelink connection control method that involves obtaining and sending access control parameters to indicate sidelink connection behavior, allowing terminals to manage sidelink unicast or groupcast communications based on resource allocation modes, including network scheduling and autonomous selection, to prevent congestion by determining whether sidelink transmissions are allowed or prohibited using these modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LTE sidelink supports only broadcast communication for basic safety communication, then the system is simple to implement, but it cannot support advanced V2X services with strict QoS requirements
Solution Approach 1:
The patent segments sidelink communication into distinct modes (broadcast, groupcast, unicast) and transmission types, allowing the system to support both basic safety communication and advanced V2X services with different QoS requirements through differentiated resource allocation and access control mechanisms
Solution Approach 2:
The patent introduces dynamic access control parameters that can be adjusted based on network conditions and service requirements, enabling the system to adapt between simple broadcast modes for basic services and complex scheduled modes for advanced services with strict QoS
2Productivity
If LTE sidelink allows direct data transmission between UEs without network device, then communication efficiency is improved, but congestion occurs in high-density scenarios due to lack of access control
Solution Approach 1:
The patent introduces access control parameters as intermediaries between the terminal and sidelink transmission, allowing terminals to autonomously control their transmission behavior based on network conditions, thereby preventing congestion while maintaining direct communication efficiency
Solution Approach 2:
The patent implements feedback mechanisms where terminals monitor sidelink conditions and adjust their transmission behavior based on received access control parameters, creating a self-regulating system that prevents congestion in high-density scenarios
3Device complexity
If terminals perform autonomous resource selection for sidelink transmission, then network scheduling overhead is reduced, but resource allocation efficiency deteriorates in high-density scenarios
Solution Approach 1:
The patent changes key parameters including access control states (allowed/prohibited), transmission types (broadcast/groupcast/unicast), and resource pool configurations to enable terminals to efficiently select resources autonomously while avoiding conflicts in high-density scenarios
Data Source
AI summary
A sidelink connection control method includes: obtaining an access control parameter used to indicate sidelink connection behavior of a first terminal; and performing sidelink communication based on the access control parameter.