The system adopts different transmission method to improve the transmission efficiency with a view to different transmission characteristic of file data and picture data . it adopts the method of capturing data packets for file data , and storing , sending for picture data 针对文件数据和图像数据不同的特点,采用不同的传输方式,对于文件数据采用数据包捕获加密的方式,对于图像数据采用存储转发的传输方式,有效地提高了网络传输效率。
Then the functions of ismg are confirmed , namely protocol conversion , routing , store - and - forward , feeing and so on . finally according to short message service signaling flow specification , this thesis focuses on the design of the software structure , which completes ismg basic functions 在此基础上，明确了短信网关的功能，即协议转换、路由、存储转发和计费，并根据短信信令流程的具体要求，设计了完成网关基本功能的软件构架。
This thesis primarily discusses what i have done in the research and practice in jxta . beginning with security area , i designed and implemented a lightweight transportation system ( p2plt ) based on jxta . firstly , the thesis introduces the p2p research complexion and my project background 本文主要论述了本人在对等网络特别是jxta架构方面所做的一些研究和实践工作，以安全为切入点，设计并实现了一个以jxta架构为基础的文件存储转发网络( p2plt ) 。
The inmarsat - c communication system chinese edition can finish all functions of the original dos based program , offering the following digital satellite communications facilities : store and forward data , store and forward telex , e - mail via internet , fleet tracking ( polling and data reporting ) , broadcast facility ( enhanced group call ) 完成后的inmarsat - c中文船用通信系统，完全实现了dos英文程序的所有功能，支持存储转发报文、数据报告、询呼、 egc等所有inmarsat - c业务。同时，对中文的传输，极大地方便了陆地和船舶用户，节省了通信费用。
After having done a lot of research on protocol h . 323 and the development platform of ip phone terminals , the author put forward a creative method to achieve the desirable goal . gatekeeper in protocol h . 323 is used as the short message storing and transferring center , and the usual ip phone terminals are unproved functionally , then the short message in protocol h . 323 is used to connect the ip phone terminals and netgate ( short message center ) , realizing the procedure for short message transmission and reception , thus short message business between the ip phone terminals is achieved 本课题通过对h . 323协议和ip电话终端开发平台的研究，创新性地提出了把h . 323协议中的网闸作为短消息存储转发的短消息中心，对普通ip电话终端进行功能上的改进，利用h . 323协议中的消息把ip电话终端和网闸(短消息中心)联系起来，实现短消息收发的流程，从而在ip电话终端上实现了短消息功能。
There are two kinds of leading products on value - added service platform for sichuan mobile communication co . , ltd chengdu branch : information and entertainment . the platform of imms differs from that of sms , mms , wap , etc . it has obvious advantages such as good interaction , fee publication , storage and transfer , 而交互式彩信平台与现有的短信、彩信、 wap等平台不同,它具有交互性强、资费透明、可存储转发等优势,因此在设计该平台下的产品时,就需要充分考虑到交互式彩信平台的这些优势。
At last , after giving study of gsm short message service realization of short message service for on - board wireless comminucation system is introduced , including short message transmission and reception , and management of short message , and problem on store and forward switching of short message , and how to realize short message sevice while executing data service or voice service 本文最后分析了gsm短消息业务的特点，细致地阐述了短消息的收发、管理、存储转发以及与数据业务、语音业务的并发实现等功能。结合车载无线数据传输系统的特点，给出了gsm短消息业务在系统中的应用。
Package handling module ( package _ server ) is responsible for assigning all received messages , which can advance real time capability ; communication agent module ( sp _ agent & smc _ agent ) is responsible for communicating with external entities , but does n ' t identify message contents , which can lighten burden of package handling module ; store - and - forward module ( store _ server ) completes store - and - forward mechanism by setting up timer , and implements overtime retransferring and failure handling ; routing module ( route _ server ) is responsible for maintaining the links with the other ismgs to implement routing ; feeing module only consists of some functions which can be called to record message items 其中，业务处理模块( package _ server )负责分派所有收到的外来消息，提高实时性；通信代理模块( sp _ agent & smc _ agent )负责与外界实体通信，不具体识别消息，可减轻业务处理模块负荷过重的压力；存储转发模块( store _ server )通过设置计时器完成存储转发机制，实现超时重传和失败处理；路由模块( route _ server )负责维护与其他网关的通信链路，实现路由；计费模块只是一些可供调用的函数，用来完成话单记录的功能。
