Design of mobile shopping system based on GSM module
introduction
With the development of social economy and improvement of living standards, people's consumption concept is no longer limited to the traditional retail industry. Mobile payment is emerging as a new mobile Internet application. Accepted. Mobile payment has been successfully applied in some countries in Europe and the Americas, Japan, South Korea, Singapore and Hong Kong; in China, China Unicom and China Mobile respectively launched mobile payment business in Guangdong in the second half of 2002, although It was late, but its broad user base and broad market prospects laid the foundation for its development, and there is a lot of room for growth.
The maturity of wireless communication technology makes the realization of mobile shopping systems feasible. It not only brings convenience to consumers, but also expands the sales channels of goods for merchants.
1 China's mobile payment business status
The so-called mobile payment refers to business transactions such as bank transfer, payment and shopping through mobile phone text messages, IVR, WAP and other methods with the help of mobile communication terminals and devices such as mobile phones, PDAs and laptops. Currently, mobile operators can provide the following three forms of mobile payment services: mobile operator's fee collection service, mobile operator's micropayment service, and mobile credit platform. Compared with traditional payment methods such as cash payment, bank transfer, and * payment, the main features of mobile payment are flexible and convenient payment and short transaction time, which can reduce the transportation time and payment processing time to and from the bank. Mobile payment can not only bring value-added benefits to mobile operators, but also bring intermediate business income to banks and financial systems. As mobile phones have begun to replace cash and security in the payment links of some stores and retail counters, the industrialization of mobile payment applications has also begun to emerge. For the mobile payment business, its industrial chain is composed of equipment manufacturers, banks, organizations, mobile operators, mobile payment service providers or mobile payment platform operators, commercial institutions, card suppliers, mobile phone suppliers, users, etc. Composed of three links.
2 Communication Technology Overview
2.1 GSM
GSM (Global System for Mobile CommunicaTIons) is a mobile communication technology standard originated in Europe. As the second-generation mobile communication technology, its development purpose is to enable a mobile phone network standard to be shared by all parts of the world, so that users can travel around the world with a mobile phone. GSM has the characteristics of high spectrum efficiency, good anti-theft capability, large network capacity, rich mobile phone number resources, clear calls, strong stability and not easy to be interfered with, sensitive information, high security, and few call dead ends. At present, there are more than 3 billion mobile phone users in the global GSM network, and the GSM communication system has become the most widely used digital wireless communication system, providing voice, short message and data services.
2.2 SMS
The short message service (Short Messaging Service, SMS) of the GSM network is the earliest short message service and the short message service with the highest penetration rate. SMS is a storage and forwarding service. It is charged according to the amount of messages. The sending and receiving of messages can be synchronized with GSM voice. It has the characteristics of being online at any time, no dialing, low price, and wide coverage. Remote maintenance, mobile e-commerce and other fields.
3 System basic structure
Taking the GSM network as the transmission platform for remote signals and the short message as the carrier for transmitting data, a mobile shopping system based on the GSM module is constructed, including a hardware platform and a software platform.
3.1 Hardware platform
The hardware is composed of three parts: system operating platform (computer), short message receiving / sending device (short message cat) and mobile communication terminal (mobile phone). The computer is connected to the SMS modem (GSM Modem) through the RS 232 serial line to control its data transmission and reception, and realize transaction monitoring. The hardware platform architecture is shown in Figure 1.
SMS cat is a dual-frequency modem connected with a computer via an RS 232 serial line and embedded with an industrial-grade communication module. It uses a wide voltage power supply, has good anti-interference ability, low electromagnetic radiation, stable and reliable performance, and simplifies the communication interface. Mobile, Unicom and PHS users send and receive text messages. It is specifically designed for short message applications, supports AT commands to control the sending and receiving of short messages, and meets the requirements of various commercial short message applications. It is suitable for various fields of wireless data communication, short message notification, remote monitoring and other applications.
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