Ubiquitous information service networks and technology based on the convergence of communications, computing and control

The rapid development of the IoT(Internet of Things)is bringing about a functional change of communication networks from“information transmission”to“information service”.First,the conception and characteristics of the IoT are in-troduced,i.e.,an Internet of humans,machines,and things meant to achieve smart information services.Then,the technology requirements for realizing ubiquitous and smart information services are described.The corresponding key technologies are also discussed,including the integration of communications,computing and control technology(3C),heterogeneous network fusion theory and technology,intelligent sensor technology and short-distance networking theory,large-scale network transmission theory and technology,the network virtualization and intelligent computing technology geared toward information service,and the collaborative network system and service model geared to the application of the IoT.Finally,the development trends of in-formation technologies and information networks in the next five to ten years are analyzed,and give some suggestions for main research areas to be explored and key issues to be resolved.

Multiple Mobile Sinks Data Dissemination Mechanism for Large Scale Wireless Sensor Network

WSN has been developing from traditional environment monitoring applications to the ubiquitous information services such as the Congestion-oriented Intelligent Transportation System （ColTS）. However, the mobility of nodes makes data dissemination a hard nut to crack. In this paper, we propose MSDD, a multiple mobile sinks data dissemination mechanism for solving the dissemination problem. The main ideas of MSDD are constructing a two-tier grid structure by a designated sink, exploiting a hierarchical monitoring mechanism, and employing a global agent to track the sink locations in order to make the emergencies reported to the sinks immediately, In addition, MSDD supports the query-driven data dissemination. Being compared with TTDD, MSDD is theoretically proved to have less communication overhead. We also validate MSDD outperforms TTDD in reliability and the emergency delivery latency bv simulations.

Development and implementation of a dynamic and 4D GIS based on semantic location model

In the big data era,robust solutions are obliged to be proposed to integrate and represent data from different formats and with different contents to assist the decision-making.Current cartographic and geographic information systems have limited capabilities for solving these problems.This paper describes an automatic and comprehensive system that conducts data fusion from all potentially related sources.In this system,a new Semantic Location Model(SemLM)is established to present the semantic concepts and location feature and demonstrate how locations are interrelated.In the SemLM,various types of location descriptors in different application scenarios can be analyzed and understood.Additionally,considering the challenges involved in data-intensive computation and visualization,this paper implements a Place-based Pan-Information System(P2S)as an innovative 4D system that dynamically associates and visualizes place-based information,using public security as the case study.