The Research On Secure Management Scheme For Meter-reading System Based On LoRa

At present,wireless meter reading communication technology has limited coverage capability,insufficient anti-interference ability,low receiving sensitivity,and cannot be used for a long time.Mobile cellular network meter reading technology and 4G IoT terminals still have the problems of high module cost and short battery life.LoRa is a new type of ultra-long-distance data transmission technology with low power consumption and low speed.Its coverage is much larger than that of the previous low-power wireless sensor network technology.Compared with other low-voltage concentrating communication technologies,it has advantages,and Lora’s security issues are becoming more and more important.Therefore,it is of great value to study LoRa-based power collection systems and their security.The research work of this paper is mainly as follows:(1)Combining the network structure of LoRa technology and its key technologies,a meter-reading system based on LoRa cluster networking is constructed.The system consists of a smart meter(built-in LoRa module),a concentrator and a power management center to form a three-level network.The smart meter and the concentrator are connected through the LoRa wireless network,and the concentrator is connected to the power management center through the LoRa wireless network.The LoRa cluster network adopts a star network architecture.Then,combined with the LoRa wireless transmission module,the structure and composition of the smart meter terminal are described.The smart meter mainly includes a control unit,a metering unit,a LoRa communication unit and a power unit.(2)The new features of LoRa technology have also bring new security problems.This paper further analyzes the security vulnerabilities of LoRa technology,and combines the security requirements of power wireless collection system to study the security scheme based on LoRa power low-voltage collection system.Based on the LoRa security architecture,a secure session key management method based on LoRa power collection system is proposed.In our scheme,a trusted third party KDS(key distribution server)is added to the original network architecture.During the LoRaWAN terminal access phase,the KDS is responsible for deriving the session key and forwarding it securely to the network and application server.The symmetric session key is used to protect the communication between the network server and the meter,in order to maintain the data during the meter reading data transmission.In order to maintain the long-term security of the proposed meter reading system,our proposed lightweight key management scheme can update the session keys automatically and remotely.It can realize more secure smart meter terminal wireless activation and remote wireless meter reading communication.Finally,we make analysis and experiments to evaluate our proposed key management scheme for the meter-reading system,the related results show our proposed scheme is secure and eff ective.