Research And Application Of Device Discovery And Management Technology In IoT

With the advent of the Internet of things 2.0 eras,the application as the core development model is being applied in various walks of life.In the traditional Internet of things,the application systems are independent from each other,the heterogeneous devices are difficult to interconnect,and the heterogeneous data is difficult to be managed uniformly.In view of these problems,this thesis studies and developes an iot device discovery and management system,which can realize automatic discovery and access of heterogeneous devices,unified management of heterogeneous data of multiple types and manufacturers,and finally share services among different application systems.This thesis mainly includes the following three aspects:(1)Aiming at the issue of data heterogeneity in IoT device,on the basis of existing protocol for interconnection and interoperability of various IoT devices,this thesis proposes a device discovery protocol in internet of things based on Simple Service Discovery Protocol(SSDP),and a general device capability model and a general device resource model are established.That makes the multi sensing devices interconnected.Finally,the protocol is verified,and the result shows that the system can discover new IoT devices fast and stably.(2)Aiming at the issue that there is no unified and effective management of multi sensing data in IoT,on the basis of unified management technology of device based on middleware implementation,this thesis proposes a device management technology in IoT based on multiprocess scheduling algorithm,combined with existing process scheduling algorithm.The technology is implemented on the gateway,contains the functions of security authentication,data encryption,policy management,data storage,instruction mapping,service published and so on.At last,the feasibility of device management technology in IoT is verified by the experiment,the result shows that the technology can effectively manage the sensing data and greatly reduce the probability of data blocking and losing.(3)Based on the above research results,this thesis designs and implements a complete set of application system for device discovery and management in IoT,and the whole application system's service flow is verified at last.