Dual-channel Structure For Software-defined Wireless Sensor Networks

Today is an era of the Internet.Big data,cloud computing and machine learning have led the development of a tremendous amount of industries.People's demand for information is also growing and sensing information is a sort of important information that people need.In recent years,due to the birth of new products such as intelligent household appliances and medical Internet of things,wireless sensor network technology changes people's life frequently.Wireless Sensor Networks play an indispensable role in science and technology industry because of its excellent characteristics such as flexible networking and simple deployment.Although wireless sensor networks have great potential,their problems are becoming obvious,such as complex terminal computation,lack of cooperative awareness etc.In order to solve these problems and meet different needs,researchers put forward the concept of Software Defined Wireless Sensor Network,achieving centralized control and separation of data plane and control plane.This paper summarizes the achievements of software-defined wireless sensor networks and routing technologies,based on which,a dual-channel structure for software-defined wireless sensor networks is proposed.In the process of network establishment,the dual-channel makes control information and sensing information be transmitted in two channels respectively.Control information helps establish the network and sensing information is measured by the sensors.Dual-channel struc ture alleviates the traffic load which happens in single channel structure,avoids the collision of two kinds of information,and improves network performance.Firstly,this paper finishes the process of sensor data acquisition and upload in centralized control mechanism,and completes the sensor data acquisition and upload in hardware platform.Then,this paper analyses the shortcomings of single channel structure and illustrates the advantages of dual channel structure.Then,this paper explains the process of building dual-channel structure in detail,including neighbor discovery,topology collection,routing rules distribution and dual-channel mapping.By the process mentioned above,the dual-channel structure establishes ultimately.Finally,this paper gives the optimization direction of problems existing in the dual-channel structure,and outlooks the future work.