Research And Implementation Of Wireless Sensor Network Node Management System Based On OID

With the rapid development and increasing maturity of the wireless communication technology,sensor technology and embedded computer technology in recent years,the wireless sensor network has achieved large-scale applications and impressive development.As mass sensor nodes are deployed in the wireless sensor network,efficient management of mass sensor nodes has become an increasingly prominent issue.At the same time,the wireless sensor network usually has the characteristics of heterogeneity,strong dynamics,and limited resources,which exacerbate the difficulty for users to manage the sensor nodes in the wireless sensor network.Currently,the "point-to-point" management mechanism is mostly adopted in the wireless sensor node management scheme,resulting in a series of problems,including management inefficiency,complex management processes,difficulties in authenticating the identity of managed objects,failure to simultaneously manage mass sensor nodes,etc.In response to the above problems,based on an in-depth research and analysis of the national sensor network identification standard and SNMP(Simple Network Management Protocol)in combination with sensor node identity OID(Object Identifier)and management object OID in SNMP MIB(Management Information Base),this thesis proposed an OID-based wireless sensor network node management system scheme,which realized the unified and efficient management of mass sensor nodes with unified OID codes through the maturely and widely used SNMP protocol.The main contents of this thesis are as follows:1.Based on the national standard for sensor network identification,and the combination of the sensor node identity OID with the management object OID in the SNMP MIB,a SNMP-based sensor object management object OID coding mechanism was proposed,so that the node management system can identify and manage the identity,attributes and various entities of the target sensor node in the wireless sensor network simply by passing the node management object OID.2.In view of the large number of sensor nodes deployed and the coexistence of multiple heterogeneous wireless sensor networks at present,a hierarchical mapping and addressing mechanism for OID and communication address was designed,so that users do not need to care about the underlying protocol of the sensor network,the access gateway of the sensor node and the change of communication address in the process of node management.3.Based on the standard SNMP protocol,the wireless sensor network node management function was designed and extended: On the management server,the SNMP manager module was designed based on the NET-SNMP open source code,and it was able to implement the node identity recognition and sensor network gateway communication address mapping management function.In the traditional sensor network gateway,the SNMP Proxy module applied to the management of sensor nodes was designed to realize the addressing of the sensor nodes in the underlying heterogeneous sensor network and the conversion and forwarding of the SNMP management protocol.In the sensor node,the SNMP Agent module was designed based on the Contiki platform SNMP protocol software,and it realized the conventional configuration management and sensing information management of the sensor node equipment.4.The client of the management system was developed based on the Qt platform,and a complete set of sensor node management prototype system including "clientmanagement server-sensor network gateway-sensor node" was constructed to verify the scheme proposed in this thesis.The results show that the OID-based wireless sensor network node management system researched and designed in this thesis is feasible and can meet the needs of users for remote management of sensor nodes in the wireless sensor network.At the same time,it has certain technical advantages over traditional management system solutions.The research work in this thesis provides certain reference value for promoting the application of OID technology in node management of wireless sensor networks.