The Internet of Things (IoT) is increasingly part of daily life. However, the development of IoT applications still faces many problems, such as heterogeneity, complex management, and other difficulties. In this paper, first, the open source technologies of IoT are surveyed. We compare these technologies from the point of view of different levels of technical requirements, such as device management, data management, communication, intelligent data processing, security and privacy protection; we also look at requirements of application development and deployment. Second, an IoT integrated development platform architecture for IoT applications based on open source ecosystem is proposed and evaluated in an industrial setting. We applied P2P technology to distributed resource management and blockchain-based smart contract mechanics for resource billing management. The results show that the IoT gateway based on an open source ecosystem had a stable and reliable system performance with a certain data size and concurrency scale. These conditions satisfy the application requirements of the IoT in most sensing environments.

Abstract. SDN technology implements network deployment/management flexibility and network resource virtualization by the separation of the control plane and forwarding plane of the network. However, SDN technology faces the same problems as the traditional network does, that is the network can't recognize the network traffic characteristics. Therefore SDN can't achieve automation of network management and deployment. Based on the analysis of SDN technology, the related key technologies of SDN network traffic identification and network control mechanisms are analyzed and finally the possible research direction on the SDN intelligent traffic identification and control are given out.