Ubiquitous sensor network and construction method thereof

Abstract

The invention provides a ubiquitous sensor network which comprises a plurality of sensor nodes. The ubiquitous sensor network comprises a sensor network gateway and at least one sensor group; the sensor network gateway is used for enabling the ubiquitous sensor network to be connected with a communication network; the sensor group is formed by the plurality of sensor nodes and a control node; a ring topology is formed by the sensor group; the information of a former sensor node and a next sensor node of every sensor node is stored on every sensor node which is formed in the sensor group; the information of every sensor node which is formed in the sensor group is stored on the control node; the information of the sensor nodes and the control node which are formed in the ubiquitous sensor network is stored on the sensor network gateway.

Description

technical field [0001] The invention relates to the technical field of sensor networks, in particular to ubiquitous sensor networks. Background technique [0002] In recent years, sensor network technology has been widely used in industrial and civil fields, especially in environmental monitoring and industrial automation control. Generally, a sensor network contains multiple small automatic devices, which are called sensor nodes. Based on increasingly complex tasks and increasing costs, the latest trend is to connect multiple isolated sensor nodes through communication networks, especially wireless communication networks, in order to break through the limitations of traditional sensor networks based on geographic location. This technology is called Ubiquitous sensor network. [0003] In order to realize the ubiquitous sensor network, it is necessary to solve the problem of how to group the sensors and how to realize the secure communication within the sensor group. This ...

AI Technical Summary

Problems solved by technology

[0008] Localized Encryption and Authentication Protocol (LEAP for short), LEAP supports setting 4 kinds of keys on each sensor node to achieve different levels of communication encryption. However, when updating the key operation, LEAP limits the routing protocol of the network It must be organized in a tree structure, which greatly limits its practical application

[0009] Logical Key Hierarchy (LKH for short), LKH provides a centralized group key update scheme based on the key tree hierarchy, but the complexity of this key update operation is similar to that of a group-scale pair number, which is no longer practical in the case of large group sizes

[0010] Therefore, the existing tree-based grouping scheme cannot effectively solve the problem of secure communication within the group, especially in terms of key update or flexible grouping, which cannot meet the needs of practical applications.

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