Research On Technologies Of Gateway Over The Internet Of Things

With the rapid development of computer and Internet technology,the Internet-of-Things(IoT)have been gradually moving from concept to reality.The IoT connects the mass of the sensing devices with the Internet through integration of intellisense,intelligent identification and cloud computing technology to implement intelligent identification and perception.The IoT is regarded as an important part of the next generation of information technology.As the important data aggregation,forwarding and control functions managed node,the gateway will become the connecting link between perception and traditional communication networks,and will play a very important role in the coming era of the IoT.This paper summarizes the networking gateway technology principle,and investigated the common wireless communications standards and hardware modules.Then we designed the hardware system of the communication-fusion based gateway,In addition,we analyzed the coexistence issue of multi wireless systems,and then we proposed an improved WLAN channel allocation algorithm.Based on these researches and features of pregnancy care,we designed a multi-communication-fusion based mobile monitoring system for maternal and fetal information.The main content of this paper is divided into three areas:Firstly,we designed the hardware architecture of the fusion gateway.This article will integrate several commonly used communication module in one system to realize the prototype of multiple communication fusion gateway.Secondly,we analyzed the coexistence issue of multi wireless systems,and then we proposed an improved WLAN channel allocation algorithm.In order to make full use of the management feature of IoT fusion gateway,we put forward a kind of WLAN system channel allocation algorithm based on centralized control.The algorithm takes a variety of confounding factors inside and outside the WLAN systems into account to complete channel assignment in each wireless access point.Experimental results show that the algorithm can effectively reduce the overall interference value of the system and reduce shock effects in network planning.Thirdly,we propose a mobile pregnancy vital signs monitoring system based on multi-communication fusion.This system comprises user data acquisition,a central server,and a remote doctor.The user end integrates vital sign data collection,a power amplifier,display,calling,data exchange,and other functions so pregnant women can acquire vital signs data by themselves.The data are uploaded to the central server for further processing and storage.Using these data,doctors can provide a relevant diagnosis and advice.This system associates the monitoring devices,users,and doctors in a flexible manner.Thus,our system could relieve the pressure on limited medical services and provide a comprehensive and easy-to-use service for gravidae.