free transmission meaning in English
空行程传动
自由行程机构传动装置
Examples
- Measurement and control ; performance tests on process computer systems ; time measurement ; function tested : data transmission with error free transmission circuit
测量和控制.过程计算机系统的性能试验.时间测量.被测 - Arq ( auto repeat on request ) is used in data communication to garauntee error - free transmission , but it is not suitable for video communication because video communication has stringent delay requirement and limitless retransmission is not allowed
传统的数据通信通过出错重传的方法保证数据的无差错传输，但是这种方法不适合实时视频通信。因为视频通信对延迟有严格的要求，不可能使用无限制的重传。 - Since epon is a multipoint - to - point system , a major feature for this new architecture is the use of a shared transmission media between all users ; hence , medium access control arbitration mechanisms are essential for the successful implementation of epon : ensure a contention - free transmission and provide end users with an equal access to the shared media
由于epon特殊的点到多点的网络拓扑结构,在上行方向各个光网络单元onu ( opticalnetworkunit )共享信道带宽,采用时分多址tdma的方式发送数据,因此需要采用媒体接入控制( mac )协议来协调各个onu的发送,避免上行数据的冲突。 - 1 ) realization of software packet embedded in m - es and md - is respectively to accomplish main function of mdlp , including assignment of tei ( temporary equipment identifier ) , establishment of multiple frame operation , framing , flow control and error - free transmission of packets , is detailed . 2 ) a test model is established to evaluate the robustness and stability of mdlp and verify the validity of software packets . 3 ) according to the design of radio modem construction used in m - es , the modules of interface between data terminal equipment and radio modem are achieved to enable transmission of short message and continuous pseudo - random bit stream via rs232 uart
本文首先概述了蜂窝数字分组数据网的结构和空中协议，详细分析了移动数据链路协议，并在此基础上，重点叙述了以下方面的工作： 1 )设计并完成了分别应用于m - es和md - is端无线控制器的两套程序实现数据链路层的主要功能，包括分配临时设备号、建立链路、组帧和面向连接的服务保证分组正确无误地传输，并进行适当的流控； 2 )建立测试模型测试移动数据链路协议的可靠性和稳定性，证明了程序包的效用； 3 )根据cdpd系统无线调制解调器的软硬件总体设计方案，完成了接口模块，实现了rs232异步串口通信，使用户可以根据需要发送短消息或连续的伪随机比特流； 4 )在tms320c54x的软件、硬件仿真平台上，建立了cdpd试验模型，实现了cdpd系统的mdlp基本功能。