A real - time communication mode is presented based on the messages between the tasks or processes in the embedded real - time system , the realization of the asynchronous communication based on this two - level message in the switches controlled by the program is analyzed 摘要提出了一种嵌入式实时系统多任务或进程间通过消息进行通信的方法,着重分析了两级消息通信方式在程控交换机上的异步通信的实现。
The discourse describes the architecture and implementation of the collaboration framework . it provides a distributed architecture for collaboration using synchronous communications like multimedia conferencing , instant messaging , shared web - browsing and asynchronous communications like discussion 该框架为同步通信和异步通信提供了分布式的体系结构,同步通信包括:多媒体会议,即时消息,共享web浏览等等,异步通信包括:论坛,共享文件,语音和视频邮件等等。
Fieldbus builds up interconnections among field instruments and field control units by providing a wholly digital , bi - directional and multi - variant communication path , which has no i only greatly improved the reliability and ability of anti - disturbance , but also sharply reduces the costs of installation and routine maintenance . can ( controller area bus ) belongs to the asynchronous communication network 现场总线使得现场仪表之间、现场仪表与控制设备之间构成网络互连系统,实现全数字化、双向、多变量的数字通讯,这大大地提高了系统的可靠性和抗干扰能力,同时节省了整个系统的投资、安装及后期维护费用。
Differed from traditional messaging technologies , such as remote method invocation , jms promotes the reliability of asynchronous communication between components in distributed computing environments , and can be used for establishing loosely - coupled messaging system . therefore , it simplifies the development of enterprise applications 相比传统消息传送技术如rmi来说, jms促进了分布式计算环境中各个组件之间可靠的异步通信,可以用来构建松散偶合的消息系统,从而大大简化了企业应用的开发过程。
Optical code division multiple access ( ocdma ) is a communication mode which introduces the code division multiple access ( cdma ) technology into optical fiber communication system . besides providing asynchronous communications access , ocdma system has many advantages , such as high capacity , security against interception , suppression of narrow band disturbances , capability in forming variable bit rate networks and multi - rate networks . it implies a great challenge for the development of future communication networks , especially all optical networks 光码分多址( ocdma )是将码分多址( cdma )技术与大容量的光纤通信技术相结合的一种通信方式,其主要优点表现在如下几个方面:允许多个用户随机地接入同一信道:可构成真正“透明”的全光通信网络;具有良好的安全性;允许可变速率或多速率传输,并可同时提供多种业务支持;具有优良好的抗干扰能力,并能够充分地利用石英光纤的可用带宽。