Research And Design Of Intelligent Electronic Bus Stop Based On C/S Architecture

With the development of computer technology, the thought of intelligent and modularhas more and more integrated into people’s lives. The intelligent and smart ideas are notonly constantly changing the way of people’s life, but also providing much convenience forpeople’s lives. The purpose of this design is to design an intelligent bus electronic bus stopsystem based on IP network and a nested C/S model. The electronic bus stop board systemabandoned the technologies such as2G mobile communication network and radiofrequency identification which are widely used in the traditional bus system. The systemwe have designed uses Wi-Fi access technology based on the IEEE802.11standard and theasynchronous socket which is provided by the standard C language to realize thecommunication between the site such as center server, bus and electronic bus stop. Inaddition, we use the ARM microprocessor as the control host. Using Wi-Fi access canensure the stability of the network and bandwidth. The operation mode with the carrierscan reduce operating costs. The bus system communication site access to the same network,after the start of each individual site, each of them will get a unique IP address in the publictransport network. And the address is generally not change, which provides a convenientplatform for function extension.This design describes the characteristic of the design of the electronic bus stop fromseveral aspects such as overall scheme, communication model, database and reliability.The paper analyses the software platform dependencies and the basic hardware constraintson the intelligent bus electronic bus stop. According to the Internet communicationsrequirements of the intelligent bus electronic stop bus system, the system uses nestedmodel of C/S to realize the communication data transmission between sites. Virtualproprietary network (VPN) technology is used to effectively combine operators to offerWi-Fi networks, and then make all communications site access to transit VPN network.The intelligent electronic bus stop uses SQLite3database to store the operation data of the intelligent electronic bus stop. In addition, the SQLite3database is encrypted in order toimprove the security of data. On the other hand, considering specifications of the site in thebus system may be too large, we use the bus lines grouping scheme to reduce concurrencyrequirements for transit center server and improve reliability. Furthermore, we useredundancy scheme design, when the neighboring intelligent electronic bus stop is failure,the data can still be passed a fault under the platform of a platform, so as to improve thereliability of public transport system. The paper compiles the OpenSSL source in Windowssystem, and then analyzes the portability of the OpenSSL, so that we can usesSSL-encrypted TCP connection in the communication needs which has high securityrequirements.This final design uses Visual Studio2008to realize a simulated intelligent electronicbus stop system. The system uses MFC library of Microsoft and ActiveX control to act asthe bus communication site of the simulated system. In this simulated bus system, theencrypted SQLite3database is used to store the center server of the bus system. Theasynchronous data communication between sites in the Bus system is realized by using theAll-UDP protocol.