Based On Paap Protocol Research And Implementation Of Remote Application System Of Communication

Represented by smartphone and tablet PC, rapid development and popularity ofmobile terminal technology have changed people’s lives greatly. After all, it’sperformance such as CPU processing capability and size of RAM can not be comparedwith PC and server. This paper provides a kind of remote application solution to theclient base those need mobile officing without laptops，which mobile terminal could runa variety of programs by Linux application proxy server, while those applicationprograms are actually running on remote Windows application servers. By this way, itwill not only take full advantage of the portability of mobile terminal, but alsoovercome its performance deficiencies.At first, this paper contrasted and analyzed the advantages and disadvantages of theexistent mainstream remote application communication systems, put forward the systemframework of remote application proxy solution based on PAAP protocol.Then the paper gave detailed design of PAAP protocol, designed the protocolhierarchy. Aimed at guild layer、authentication layer、initiation layer、refresh layer、LS-WS Layer，it finished its field design and packet structure design, analyzed packetsinteractive processing, analyzed how to guarantee the veracity and fluency ofcommunication by some mechanisms such as retransmission, then the paper gave thestate machine design.As the bridge between mobile terminal and background application servers, theforth chapter designed two important modules of Linux application proxy server, whichare tsmanager and tsum. The paper designed each sub-module to complete a series offunctions for the two parts, researched interaction between sub-modules, analyzedmechanisms of application proxy server correspond to the manipulation of mobileterminal, and gave the design and implementation of CHECK sub-module of tsmanager,then designed a kind of private encryption algorithm PE to ensure the security of user’sdata in checking process.Then the thesis described the design of plug RemoteAppServer on Windowsbackground application servers, analysed the functions and FUNC interfaces of each sub-module、the call relations and interaction between sub-modules, analyzed workprocess of sub-module IME of RemoteAppServer, and how it works by the assistant ofother sub-modules, then showed the realization of IME.At last, the paper gave the summary and outlook of this study.