MMS Transport Technology For None-Mobile-Phone Terminal

Nowadays, what the mobile communication brings to us is an information carnival, through the development of technology. As the advancing experience of 3G era, Multiple Messaging Service (MMS) enriches the application of wireless data communication.In this paper, a method of realizing long-distance data transmission by dint of none-mobile-phone termial is introduced, which using MMS as the information carrier,based on the exsisted wireless network platform-GPRS.Meanwhile,more details about the correlation technical standards and transaction flow are given.Some researches in this dissertation have been carried out as the following:1,On the originator terminal,computer is used to collect and process data.We implement a dial-up connection by controlling the GPRS modem through AT Command,under the VC environment with the C language compilation;Then use WSP session management facility to connect with the WAP Gateway,establishing a session,based on the UDP socket mechanism.2,Encapsulate a MMS Protocol Data Unit(MMS-Send.req PDU) containing the processed data we want to send, according to some related protocols of MMS and SMIL.Finally,the packets are forwarded to the gateway upon the normal WSP POST functionality,completing the sending successfully.3,Further research has been carried on in order to transplant the project design to some embedded system.On the originator terminal,we establish the data link via negotiation mechanism of PPP protocol,implementing the dial-up control,and ultimately,obtain the IP address of dynamic allocation,which helps to lay a foundation for the embed MMS transport.On the recipient terminal,we can gain the web page information where the Multiple Message has been located,by using the normal WSP GET method operation,which really make it possible to do some further processing work on the retrieved message.4,Furthermore, there are some descriptions of how to deal with the chinese character information in this treatise.It's relatively convenient to get or output the Unicode of simplified Chinese character in virtue of creating a converting table between GB2312-80 and UCS2, according with the MMS criterion.