【摘要】 针对大型有线数字传感网络的数据传输要求和特性,提出一种适合网络节点大跨距条件的低功耗高速数据传输协议,阐述了在物理层采用以太网PHY芯片,实现数据实时高速可靠传输的设计新思路,介绍了协议跨层精简设计的技术,对该协议的实时性能进行了分析,并讨论了选择恰当的数据帧长来提高数据输送效率的方法.实验表明:节点间220 m大跨距时,该协议下通过双绞线,全网数据速率可达40 Mbps,能满足大型有线数字传感网络的高速实时应用需求。更多还原

【Abstract】 In view of the requirements and features of data transmission in a large-scale wired digital sensor network, a low power High-speed Data Transmission Protocol(HDTP) is proposed,which is suitable for long node span.The paper gives a new design for real-time,high-speed and reliable data transmission using Ethernet PHY chips in the physical layer,and describes the techniques of cross-layer protocol design.Also the paper analyzes the real-time performance of HDTP and the way of improving the efficiency of data transmission through selecting appropriate data frame length.Experiment results show that the data rate of HDTP can reach up to 40 Mbps using unshielded twisted pair,which meets the real-time requirements of large-scale wired digital sensor network with long node span.更多还原