V2X RAT Selection Using Application Categories and KPI Mapping
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Solution Overview
Problem
The increasing use of 3GPP LTE systems by devices such as IoT UEs and V2X communications has strained network resources and increased communication complexity, particularly in vehicle-to-everything (V2X) communications, due to the variety of applications and rapidly moving vehicles.
Innovation Solution
Implementing a system that supports radio access technology (RAT) selection and transition in vehicle-to-everything (V2X) communications across various radio access technologies, including cellular and wireless local area networks, using a management object (MO) to manage authorization and radio parameters for V2X communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radio access technologies are deployed to support diverse V2X applications, then the system's adaptability and service coverage are improved, but the device complexity and network management difficulty increase
Solution Approach 1:
The patent segments V2X applications into different categories (safety-critical, non-safety critical) and assigns different RATs to different categories. This segmentation allows the system to support multiple applications without requiring all devices to handle all RATs simultaneously, thereby reducing individual device complexity while maintaining overall system versatility.
Solution Approach 2:
The patent introduces an intermediary mechanism (RAT selection based on application category) that mediates between the diverse V2X applications and the multiple RATs. This intermediary layer simplifies the mapping process by providing clear rules for RAT selection, reducing the complexity burden on individual devices while enabling support for multiple applications.
2Productivity
If LTE systems are extensively used for V2X communications, then network resource utilization is improved, but communication latency and reliability deteriorate due to network congestion
Solution Approach 1:
The patent changes the parameter of RAT selection based on application requirements. For safety-critical applications, it selects RATs with lower latency and higher reliability (such as licensed spectrum-based technologies), while for non-safety critical applications, it utilizes LTE networks to maintain resource utilization. This parameter-based differentiation resolves the contradiction by optimizing reliability for critical communications while preserving productivity for non-critical traffic.
3Productivity
If RAT selection is optimized for specific applications, then communication efficiency is improved, but the complexity of RAT management and authorization increases
Solution Approach 1:
The patent applies local quality by tailoring RAT selection to specific application categories rather than using a uniform approach for all V2X communications. Safety-critical applications receive specialized RAT allocation with prioritized access, while non-safety applications use standard LTE procedures. This localized optimization improves communication efficiency for each category without requiring complex global management, as each category has its own simplified management rules.
Data Source
AI summary
Systems and methods of providing a V2X communications are generally described. A geographically-limited, operator-independent mapping table is used that maps between groups of V2X applications each associated with a different application category and a different RAT preferred for the V2X application category. Each grouping is based on fulfillment of one or more KP Is for the associated V2X application category. Multiple RA Ts are prioritized if able to fulfill the KP Is. The mapping table is modified based on the RATs supported by the V2X UE. Carrier aggregation is used when simultaneous transmission on different RATs is desired.