Study And Design Of Internet Of Things System For IPv6 Intelligent Campus Based On 6LoWPAN

With China's education system reform,the broadband demand,multi service requirements and security issues of campus network continue to increase,so IPv4 campus network has been unable to meet the demand of the current situation.At present,the Internet demonstration project of next generation(CNGI)CERNET2 core network using pure IPv6 technology to provide IPv6 access service for more than 200 universities and scientific research units,that means IPv6 technology and related equipment has been mature.Therefore,we should pay great attention to the construction of IPv6 campus network,research and design of intelligent campus network based on IPv6 is of great significance.IPv6 intelligent campus network construction is facing many challenges.First of all,as the main technology of IPv6 smart campus network,Internet of things lack of IPv6 communication standard,and the existing TCP/IP protocol can not meet this demand,so it needs a new protocol to solve the problem of information interaction between objects and between objects and people.Second,the sensor node of the Internet of things uses IEEE802.15.4 protocol,but the physical layer of the IEEE802.15.4 could just load limited message length,if IPv6 wants to run on IEEE802.15.4,it should improve the transmission efficiency of loading and compress the header.Finally,the Internet of things underlying node's communication ability compared to common network node is poor,and traditional address auto configuration schem such as DHCP needs too much communication delay and higher energy and bandwidth consumption in the network,therefore it is not suitable for Internet of things,so we should design new address auto configuration scheme in order to suit for the Internet of things.This thesis,which solves problems in building IPv6 smart campus network metioned above from a practical point of view,puts forward a solving method and improvement of three-dimensional space based on the LOWPAN_IPHC address configuration header compression scheme.The main research contents and results of this paper include the following aspects:1.Address auto configuration scheme based on the three-dimensional.In this scheme,the stateless address assignment is performed by using the three-dimensional coordinates of the node when the 6LoWPAN node applys for the IPv6 address.Threedimensional coordinates will be designed to 16 bit short address.In addition,the software platform is used to test the three-dimensional address auto configuration schem,and the experimental results will be analyzed and compared with Strong DAD and LISAA address configuration schem to verify the effectieveness of the proposed scheme.2.Improved LOWPAN_IPHC header compression schemem.This higher transmission efficiency head compress scheme,which adopts the stateless address configuration method of three-dimensional space,only retains stateless mode in LoWPAN_IPHC,removes CID,SAC,DAC field in encoding,and adds GL(Global/Local)address control field.Finally,in the simulation environment,the analysis and comparison to LoWPAN_IPHC header compression scheme verify its effectiveness.3.Intelligent campus networking system simulation based on the 6LoWPAN.As an example of constructing intelligent campus network in Yunnan Normal University,this paper designs a intelligent campus networking system based on 6Lo WPAN.This system,based on 6Lo WPAN protocol,uses three-dimensional space address auto configuration of a star network,and the data transmission uses improved LOWPAN_IPHC header compression scheme.Finally,simulation results from the practical point of view to further verify the feasibility of three-dimensional space address auto configuration and improved LOWPAN_IPHC header compression scheme.In the background of China's campus network construction,this paper analyzes the current problems encountered in the development of IPv6 smart campus,proposed and designed a three-dimensional space address configuration scheme and a modified LOWPAN_IPHC header compression scheme from a practical point of view,which works in smart campus networking system.The simulation experiment proves that it has certain feasibility and application value of the three-dimensional space address auto configuration scheme and improved LOWPAN_IPHC header compression scheme.