基于Node.js平台物联网Web服务的设计与实现

利用面向服务架构(SOA)的优势,可以解决开发人员与用户在物联网环境中面临的难题。提出了基于Node.js平台的Web服务设备配置文件(DPWS)实现方法,即Node.DPWS,Node.DPWS可在异构节点(包括资源有限的设备)上部署轻量级、高效且可扩展的Web服务。研究结果表明:通过在嵌入式设备上进行性能评估比较,Node.DPWS的性能优于WS4D-JMEDS工具包,Node.DPWS设备其平均响应时间为24.44ms,比SE和CDC快66.3%和53%。在查询Node.DPWS设备时,在12.22 s内即可完成500个请求的基准测试。Node.DPWS设备的响应速度更快,消耗内存更低。为实现新颖、更优服务物联网及其扩展性,可用性,互操作性提供技术参考。

Implementation of Internet of things Web service based on Node.js platform

In order to realize the vision of the Internet of things(IoT)and enable people to enjoy novel and enhanced services,various forms of interconnected computing systems have gradually penetrated into people's lives.Therefore,the performance,scalability,availability and interoperability of the Internet of things(IoT)have also brought significant challenges.Leveraging the benefits of service-oriented architecture(SOA)can help alleviate many of the problems that developers,implementers,and end users must face in an iot environment.A new implementation of the Web services device configuration file(DPWS)based on the node.js platform is proposed,namely node.DPWS,which enables deployment of lightweight,efficient,and scalable Web services on heterogeneous nodes,including devices with limited resources.Comparing performance estimates on embedded devices shows that node.DPWS devices are more responsive and consume less memory.