In-Vehicle Wireless Service Sharing Control

The patent segments services into shareable and non-shareable categories, and segments communication channels into public and private zones. The service sharing control unit divides service access rights among multiple mobile terminal devices based on their positions, allowing some services to be shared while others remain confidential. This segmentation resolves the contradiction by enabling multi-device communication for shareable services while maintaining confidentiality for private services through separate communication channels.

The in-vehicle device is designed with multi-functionality to serve multiple mobile terminal devices simultaneously. The service sharing control unit enables the single in-vehicle device to perform multiple functions: acting as a communication hub for shareable services while maintaining private communication channels for confidential services. This allows the device to be universally accessible to multiple users while preserving the confidentiality of private communications through selective service sharing based on device position and user authorization.

The service sharing control unit performs preliminary actions by pre-establishing authorization rules and position-based access controls before service sharing occurs. Mobile terminal devices are classified into different zones (driver zone, passenger zones) and service sharing permissions are predetermined based on these classifications. This preliminary setup prevents unintended service sharing by ensuring that only authorized devices in appropriate zones can access shareable services, while maintaining ease of operation through automatic authorization based on device position.