Overview
Connected Vehicle System (Connected Vehicle / Telematics) collects vehicle location, fuel consumption, fault codes, driving behavior, and other data through in-vehicle terminals (T-Box, OBD, in-vehicle host, etc.) and uploads it to the cloud platform via 4G/5G, MQTT, JT/T 808 protocols, supporting applications such as fleet management, remote diagnostics, UBI insurance, and logistics scheduling. Connected vehicle technology is a typical application of IoT in the transportation sector, involving multi-end coordination among vehicles, communication, platforms, and applications, with high requirements for real-time performance, reliability, and data security.
Unlike traditional IoT, vehicular network terminals are usually in motion, with complex network environments (tunnels, remote areas, cross-border roaming), and vehicle data involves privacy and security. The platform needs to support weak network retransmission, offline caching, and data encryption, while also meeting automotive-grade reliability requirements. Vehicular networks are closely related to IoT SIM cards: in-vehicle terminals mostly use IoT SIM cards (rather than consumer-grade SIM cards) to connect. SimtoLink can provide dedicated IoT SIM cards, data pools, international roaming, and other connectivity services for vehicles in vehicular network scenarios, ensuring stable communication for fleets worldwide.
Core Capabilities
Location Tracking and Trajectory
GPS/BeiDou dual-mode positioning, supporting real-time location reporting, trajectory playback, and electronic fencing. The reporting frequency of location data can be configured (e.g., every 10 seconds, every 30 seconds, or per kilometer) to balance real-time performance with data usage. The platform supports trajectory correction and map matching to improve trajectory accuracy. Applicable to logistics scheduling, vehicle anti-theft, and rental management.
Remote Diagnostics and Control
Read fault codes, engine parameters, battery status, etc. via OBD or in-vehicle bus, supporting remote diagnostics, fault alerts, remote lock/unlock, remote start, and other control commands. Form a closed loop with the vehicle ECU, T-Box, and cloud platform to achieve "remote vehicle monitoring and remote vehicle control." Attention to security compliance is required; control commands need multi-factor verification and replay protection.
Fleet Management and Dispatch
Vehicle dispatch, status monitoring, fuel consumption analysis, and driving behavior scoring. Supports reports and dashboards by vehicle, driver, region, and time. Logistics fleets can integrate with order systems for intelligent dispatch and route optimization; commercial vehicles can integrate fuel and mileage analysis to achieve cost management.
UBI Insurance
Usage-Based Insurance (UBI), based on driving behavior, assesses driving risks through data such as rapid acceleration, sudden braking, speeding, and night driving, enabling differentiated premiums. It requires integration with insurance companies, with data anonymization and compliant storage.
Communication Protocols and Standards
JT/T 808: A vehicle terminal communication protocol formulated by the Ministry of Transport of China, widely used in commercial vehicles and freight vehicles. The platform needs to support parsing, responses, heartbeat, and location reporting of the 808 protocol.
MQTT: A lightweight protocol suitable for passenger cars and new energy vehicles. It supports QoS and offline messages, suitable for weak network scenarios.
GB/T 32960: National monitoring platform protocol for new energy vehicles, used for reporting operational data of new energy vehicles.
4G/5G: Vehicle terminals access carrier networks via IoT SIM cards, requiring consideration of data plans, roaming, and signal coverage. SimtoLink provides IoT SIM cards dedicated for connected vehicles, supporting data pools, multi-carrier switching, and international roaming, meeting cross-region and cross-country vehicle operation needs.
Typical Platforms and Ecosystems
Huawei Car Cloud, Alibaba Cloud IoT, Tencent Connected Vehicle, and Baidu Connected Vehicle provide cloud platform capabilities; Bosch, Continental, Harman, and others provide in-vehicle hardware and T-Box; car manufacturers, operators, and internet companies jointly build the connected vehicle ecosystem. Platform selection needs to consider protocol compatibility, data security, and integration capabilities with car manufacturers.