V2X Service Discovery and Authorization in Cellular Networks
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Solution Overview
Problem
Existing LTE ProSe architecture and protocols are not scalable to meet the latency and number of vehicles supported for V2X communications, posing challenges in efficient discovery and authorization of UEs or eNBs operating as RSUs, and providing seamless connectivity for V2X services.
Innovation Solution
The implementation of a registration and authorization procedure for UEs or eNBs to operate as RSUs, along with a V2X service advertisement method and mobility management protocols, enables efficient discovery and low-latency connectivity for V2X services by broadcasting service capabilities and providing seamless mobility management within the ProSe architecture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing LTE ProSe architecture and protocols are used for V2X communications, then basic connectivity is provided, but the system cannot scale to meet latency requirements and support large numbers of vehicles
Solution Approach 1:
The patent segments the service discovery and authorization process into distinct phases: service advertisement broadcasting, UE discovery of advertised services, and on-demand authorization requests. This segmentation allows parallel processing of multiple vehicle connections while maintaining low latency for individual service access.
Solution Approach 2:
The patent implements preliminary service advertisement broadcasting by RSUs before actual V2X service access is needed. UEs can pre-discover and cache service information, so when service access is required, authorization can be quickly established without full service discovery latency, enabling scalable low-latency communication.
2Ease of operation
If existing LTE ProSe architecture is used, then basic service discovery is enabled, but efficient discovery and authorization of UEs or eNBs operating as RSUs cannot be achieved
Solution Approach 1:
The patent enables RSUs (whether UEs or eNBs) to autonomously advertise their service capabilities through broadcast messages without requiring continuous network authorization. Other UEs can independently discover these services and initiate authorization only when needed, reducing overall system complexity while improving discovery efficiency.
Solution Approach 2:
The patent introduces service advertisement messages as an intermediary mechanism between RSUs and UEs. These advertisements contain pre-processed service capability information that UEs can use to make informed discovery decisions, reducing the complexity of direct UE-RSU authorization negotiations.
3Reliability
If traditional wireless communication standards are applied to V2X, then connectivity is established, but seamless mobility management for V2X services cannot be provided
Solution Approach 1:
The patent implements dynamic mobility management where UEs continuously monitor service advertisement broadcasts from multiple RSUs and can seamlessly switch between them based on mobility state and service availability. This dynamic approach maintains connectivity reliability without requiring complex centralized mobility management, as each UE autonomously manages its own service continuity.
Data Source
AI summary
The present disclosure includes systems and methods that enable V2X communications over a wireless wide area network (WWAN). A registration request is sent to an intelligent transportation system (ITS) function. The registration request is for requesting authorization for a device to host a V2X service in a cellular network. A registration response is received from the ITS function. The registration response is for authorizing the device to host the V2X service in the cellular network. The V2X service is hosted in the cellular network via the ITS function.