Design And Implementation Of Next Generation Connected Vehicle EM Eco-system Based On 4G Cellaur Network And CAN Bus

In recent years,with the rapid application of mobile Internet,Internet of Things,and cloud computing,car networking has also been booming.The rapid development of car networking requires that the car terminals can be quickly updated.However,the development cycle of traditional car terminals is more than 36 months,and even its development has not yet been completed,it has become obsolete.In addition,the traditional vehicle terminal system is very closed and only supports offline music and navigation functions.Compared with smart phones,traditional vehicle terminals have a poor user experience.Therefore,users tend to use smart phones for online navigation and car entertainment applications.However,there is a lack of interoperability between smart phones and vehicle electronic and electrical systems,and users cannot view vehicle information and control vehicles through smart phones.When the user drives the vehicle,frequent attention needs to be switched between the smart phone and the vehicle-mounted terminal to affect driving safety.In addition,this isolation also greatly limits the development of the emerging application model of car networking.This paper is based on the limitations of the current vehicle terminal,in order to solve the pain points of the user's car network,innovatively developed a car networking system based on 4G mobile network and CAN bus communication EM Eco-system.The system includes onboard intelligent module T-BOX and user smart device end APP,and cloud SDN(based on enterprise platform).1.The onboard intelligent module T-BOX of this Eco-system system is based on the STM32 platform and integrates a 4G mobile communication module and a CAN bus module.T-BOX's embedded software development is based on UCOS real-time operating system,and application layer software adopts modular design.WIFI communication is used between T-BOX and user smart devices to meet the fast transmission of online navigation and online entertainment data.T-BOX and other modules on the vehicle adopt CAN bus communication to ensure the real-time and reliability of vehicle control information transmission.2.The development of user smart device APP is based on Google's open source mobile smart operating system Android.UI design adopts modern technology style and fully considers the user's convenience.The user terminal APP uses the Baidu Map API to implement online navigation functions,and integrates functions such as vehicle control(door/sunroof control,etc.)and vehicle information collection(tire pressure monitoring/remaining vehicle fuel).In addition,the user terminal APP is based on NFC technology to realize automatic wake-up of the APP and user identity authentication.3.The superiority of the EM Eco-system system is reflected in the user's ability to use his favorite smart device as a car terminal.As long as it supports WIFI communication,it can be combined with the car networking module T-BOX to form the car networking system,and the entire system supports software.OTA is updated remotely to keep up with the rapid development of consumer electronics.After completing the EM Eco-system system hardware and software design,after the bench test and real vehicle verification,the Eco-system system has achieved all design requirements,achieved the desired results,and also opened a user's smart device in the vehicle environment.A variety of new usage patterns.