WO2011116589A1 - Réseau de combinaison et procédé permettant à un terminal de capteurs sans fil de se joindre au réseau - Google Patents

Réseau de combinaison et procédé permettant à un terminal de capteurs sans fil de se joindre au réseau Download PDF

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Publication number
WO2011116589A1
WO2011116589A1 PCT/CN2010/076699 CN2010076699W WO2011116589A1 WO 2011116589 A1 WO2011116589 A1 WO 2011116589A1 CN 2010076699 W CN2010076699 W CN 2010076699W WO 2011116589 A1 WO2011116589 A1 WO 2011116589A1
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Prior art keywords
network
wsn terminal
wireless sensor
sensor network
wsn
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PCT/CN2010/076699
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English (en)
Chinese (zh)
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马景旺
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中兴通讯股份有限公司
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Publication of WO2011116589A1 publication Critical patent/WO2011116589A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H04W12/069—Authentication using certificates or pre-shared keys

Definitions

  • the invention relates to a network technology, in particular to a combined network and a wireless sensor network
  • wireless sensor networks are a new information acquisition and processing technology. Due to recent improvements in microfabrication technology, communication technology, and battery technology, tiny sensor terminals have the ability to sense, wirelessly communicate and process information. Such sensor terminals can not only sense and detect the target of the environment and its changes, but also process the collected data and send the processed data to the data collection center by wireless transmission.
  • These sensor terminals typically consist of a power supply, sensing components, an embedded processor, memory, communication components, and execution software. Among them, the power supply provides the sensor node with the energy necessary for normal operation.
  • the sensing component is used to sense, acquire, and convert external information into digital signals.
  • the embedded processor is responsible for coordinating the work of various parts of the node, such as performing necessary processing, saving, and controlling the operating mode of the sensing component and the power supply.
  • the communication component is responsible for communicating with other sensors or observers.
  • Execution software provides the necessary software support for sensor terminals, such as embedded operating systems, embedded database systems, and more. Detecting thermal, infrared, sonar, radar and seismic signals in the surrounding environment of the sensor terminal by means of a variety of sensing components built into the sensor terminal, thereby detecting temperature, humidity, noise, light intensity, pressure, soil composition , a lot of information such as the size, speed and direction of moving objects. Sensor terminals typically form a network in a self-organizing or pre-configured manner.
  • wireless low-power communication technology is most suitable for use of a sensor network, and is generally called a wireless sensor network.
  • the widely used wireless low-power communication technologies include: IEEE (Institute of Electrical and Electronics Engineers) 802.15.4 and Zigbee technology.
  • IEEE 802.15.4 is a low-speed wireless personal area network (WPAN) standard developed by IEEE. IEEE 802.15.4 specifies the physical layer and medium access control layer (MAC, Media Access Control) standards. The IEEE 802.15.4 compliant communication module features low cost, low power consumption, and small size.
  • WPAN wireless personal area network
  • IEEE 802.15.4 specifies the physical layer and medium access control layer (MAC, Media Access Control) standards.
  • MAC medium access control layer
  • the IEEE 802.15.4 compliant communication module features low cost, low power consumption, and small size.
  • the Zigbee Alliance is an organization dedicated to developing reliable, low-cost, low-power, wireless network connectivity monitoring and control products based on open global standards.
  • the Zigbee standard physical layer and MAC layer use IEEE 802.15.4 technology, and the network layer, security management, application layer specifications, and interoperability are developed by the Zigbee Alliance.
  • the Zigbee smart energy public applications profile and the Zigbee home automation public applications profile in the Zigbee standard are for business environment applications and home applications.
  • the WSN terminal's micro-processing capabilities and wireless communication capabilities make wireless sensor networks a promising application for military applications, biological and environmental monitoring, health applications, home applications, industrial control and monitoring.
  • Wireless sensor network combined with telecommunication network, such as second generation (2G, 2nd Generation) mobile communication, third generation (3G, 3rd Generation) mobile communication, xDSL (x Digital Subscriber line), FTTx (Fiber To The x, x is Home, building, node, premises), wireless access, satellite/microwave, etc.
  • telecommunication network such as second generation (2G, 2nd Generation) mobile communication, third generation (3G, 3rd Generation) mobile communication, xDSL (x Digital Subscriber line), FTTx (Fiber To The x, x is Home, building, node, premises), wireless access, satellite/microwave, etc.
  • 2G, 2nd Generation third generation
  • 3G, 3rd Generation Third generation
  • FTTx Wireless To The x, x is Home, building, node, premises
  • wireless access satellite/microwave, etc.
  • the wireless sensor network can effectively transmit the data perceived by the wireless sensor network to the data center. By sorting and analyzing the data, the way of acquiring data of the natural world can
  • the combination of a wireless sensor network and a telecommunication network refers to connecting a wireless sensor network with a telecommunication network, and utilizing the telecommunication network to monitor, manage, and complete the service carrying and cooperation of the wireless sensor network and the services provided by the telecommunication network, and expand the telecom network.
  • the services provided by wireless sensor networks is generally a wireless sensor network connected to a telecommunications network platform through a gateway device.
  • the WSN terminal is a sensor node constituting the wireless sensor network, and is connected to the gateway through one or more hops.
  • the WSN terminal is responsible for collecting and uploading data, as well as receiving and executing commands.
  • the number of devices that make up a wireless sensor network is as few as a few hundreds, and devices can be networked in a star, tree, or mesh (MESH) manner, some of which have strong networking and Data forwarding capability.
  • wireless sensor networks and telecommunication networks After the combination of the wireless sensor network and the telecommunication network, it is necessary to consider the management and security issues of the WSN terminal.
  • the security threats faced by wireless sensor networks and telecommunication networks include:
  • the attacker uses some devices to impersonate the WSN terminal to join the wireless sensor network, perform incorrect data reporting, and interfere with the normal operation of the sensing system.
  • the attacker uses some devices to listen to data transmitted in the wireless sensor network and modify the data to interfere with communication within the wireless sensor network.
  • the attacker picks up the attack means and continuously reports the data through the gateway, thereby increasing the traffic of the communication network and making the telecommunication network unable to work normally.
  • the main object of the present invention is to provide a method for joining a network and a WSN terminal to join a network, which can combine the wireless sensor network and the telecommunication network and ensure network security.
  • the technical solution of the present invention is achieved as follows:
  • a method for a WSN terminal to join a network comprising a wireless sensor network and a telecommunication network, and further comprising a WSN terminal authentication network element entity; the method comprising:
  • the WSN terminal authentication network element entity performs identity authentication on the WSN terminal, and after the authentication is passed, allows the WSN terminal to join the wireless sensor network;
  • the WSN terminal joins the wireless sensor network.
  • the WSN terminal joins the wireless sensor network, which is:
  • the WSN terminal obtains network configuration parameters of the wireless sensor network
  • the WSN terminal joins the wireless sensor network using the network configuration parameters.
  • the WSN terminal obtains network parameters of the joined wireless sensor network, where: the WSN terminal authentication network element entity provides the network configuration parameter to the WSN terminal.
  • the WSN terminal obtains network parameters of the joined wireless sensor network, where: the wireless sensor network gateway provides the network configuration parameter to the WSN terminal.
  • the WSN terminal is provided with an identity identification module, and the WSN terminal authentication network unit entity identifies the WSN terminal by using the information in the identity identification module to perform identity authentication on the WSN terminal.
  • the telecommunication network comprises a wireless sensor network management platform and a service platform, and the setting information of the wireless sensor network that the WSN terminal can join is set in the wireless sensor network management platform or the service platform.
  • the method further includes:
  • the gateway After receiving the request of the WSN terminal to join the wireless sensor network, the gateway notifies the WSN terminal that the network element entity has a new WSN terminal to join, and carries the identifier information of the WSN terminal and the requested wireless sensor network. Identification information;
  • the WSN terminal authentication network unit entity obtains setting information of the wireless sensor network that the WSN terminal can join, and determines, according to the information, whether the WSN terminal is allowed to join the wireless sensor network that is requested to join, and performs identity authentication on the WSN terminal when allowed. .
  • the telecommunication network is provided with a WSN terminal information storage unit, configured to store information of the WSN terminal, including identifier information of the WSN terminal, authentication information used by the WSN terminal identity authentication, and a wireless sensor network that the WSN terminal can join.
  • a WSN terminal information storage unit configured to store information of the WSN terminal, including identifier information of the WSN terminal, authentication information used by the WSN terminal identity authentication, and a wireless sensor network that the WSN terminal can join. Setting information;
  • the WSN terminal authentication network unit entity obtains, from the WSN terminal information storage unit, setting information of the wireless sensor network that the WSN terminal can join, and WSN terminal authentication related information.
  • the WSN terminal information storage unit is located in a wireless sensor network management platform, or in a service platform, or in other network element entities in a telecommunication network.
  • the WSN terminal authentication network element entity is a wireless sensor network management platform, or a service platform, or other network element entity in a telecommunication network.
  • the WSN terminal authentication network element entity provides the network configuration parameter to the WSN terminal by:
  • the WSN terminal network authentication unit entity may obtain the network configuration parameter from a gateway of the wireless sensor network;
  • the WSN terminal network authentication unit entity sends the network configuration parameters to the WSN terminal.
  • a combined network including a wireless sensor network WSN and a telecommunication network, and a WSN terminal authentication network element entity;
  • the WSN terminal authentication network unit entity is configured to perform identity authentication on the WSN terminal, and after the authentication is passed, allow the WSN terminal to join the wireless sensor network;
  • the WSN terminal joins the wireless sensor network.
  • the WSN terminal joins the wireless sensor network, which is:
  • the WSN terminal authentication network element entity will be the network of the requested wireless sensor network Sending configuration parameters to the WSN terminal;
  • the WSN terminal joins the requested wireless sensor network with the network configuration parameters.
  • the WSN terminal is provided with an identity identification module, and the WSN terminal authentication network unit entity identifies the WSN terminal by using the information in the identity identification module to perform identity authentication on the WSN terminal.
  • the telecommunication network comprises a wireless sensor network management platform and a service platform, and the setting information of the wireless sensor network that the WSN terminal can join is set in the wireless sensor network management platform or the service platform.
  • the method further includes:
  • the gateway After receiving the request of the WSN terminal to join the wireless sensor network, the gateway notifies the WSN terminal that the network element entity has a new WSN terminal to join, and carries the identifier information of the WSN terminal and the requested wireless sensor network. Identification information;
  • the WSN terminal authentication network unit entity obtains setting information of the wireless sensor network that the WSN terminal can join, and determines, according to the information, whether the WSN terminal is allowed to join the wireless sensor network that is requested to join, and performs identity authentication on the WSN terminal when allowed. .
  • the telecommunication network is provided with a WSN terminal information storage unit, configured to store information of the WSN terminal, including identifier information of the WSN terminal, authentication information used by the WSN terminal identity authentication, and a wireless sensor network that the WSN terminal can join.
  • a WSN terminal information storage unit configured to store information of the WSN terminal, including identifier information of the WSN terminal, authentication information used by the WSN terminal identity authentication, and a wireless sensor network that the WSN terminal can join. Setting information;
  • the WSN terminal authentication network unit entity obtains, from the WSN terminal information storage unit, setting information of the wireless sensor network that the WSN terminal can join, and WSN terminal authentication related information.
  • the WSN terminal information storage unit is located in a wireless sensor network management platform, or in a service platform, or in other network element entities in a telecommunication network.
  • the WSN terminal authentication network element entity is a wireless sensor network management platform, a service platform or other network element entity in a telecommunication network.
  • the wireless sensor network management platform for managing the network nodes in the wireless sensor network is set in the combined network and
  • the wireless sensor network service client implements the authentication and joining of the WSN terminal, and does not cause the illegal WSN terminal to join the wireless sensor network, thereby ensuring network security.
  • FIG. 1 is a schematic diagram of a combined network structure of the present invention
  • FIG. 2 is a flowchart of a method for a WSN terminal to join a network according to the present invention
  • FIG. 3 is a flow chart of another method for a WSN terminal to join a network according to the present invention. detailed description
  • the basic idea of the present invention is: By combining a wireless sensor network and a telecommunication network, the application function of the wireless sensor network is greatly expanded, and a wireless sensor network for managing network nodes in the wireless sensor network is set in the combined network.
  • the management platform and the wireless sensor network service client realize the authentication and joining of the WSN terminal, and will not cause the illegal WSN terminal to join the wireless sensor network, thereby ensuring the network security.
  • the wireless sensor network is a wireless network composed of a group of sensor node devices in a self-organizing manner, and the sensor node devices communicate by short-range wireless communication technology.
  • Wireless sensor networks are typically deployed in areas ranging from a few meters to a few hundred meters, where sensor node devices are typically battery powered, with lower power and cost.
  • Near field communication technology generally uses Zigbee and IEEE 802.15.4 technology.
  • the wireless sensor network is combined with the telecommunication network to connect the wireless sensor network with the telecommunication network, and utilize the telecommunication network to enter the wireless sensor network and the services provided by the telecommunication network. It monitors, manages and completes the bearer and cooperation implementation of the business, and expands the services provided by the wireless sensor network through the telecommunication network.
  • the telecommunication network includes various communication networks such as mobile communication networks, xDSL, FTTx, and satellite communications.
  • the wireless sensor network is composed of a WSN terminal and a gateway device, and the WSN terminal and the gateway can be set up according to relevant technical standards of the wireless sensor network, and the short-range communication technology that can be used to form the wireless sensor network includes Zigbee technology, IEEE 802.15.4. Standards, etc.
  • the wireless sensor network is connected to the telecommunication network through a gateway, and establishes communication with a wireless sensor network management platform in the telecommunication network.
  • the network includes a wireless sensor network and a telecommunication network, and further includes a WSN terminal authentication network element entity; wherein the WSN terminal authentication network element entity The WSN terminal performs identity authentication, and after the authentication is passed, the WSN terminal is allowed to join the wireless sensor network;
  • the WSN terminal joins the wireless sensor network.
  • the wireless sensor network is provided with a WSN terminal and a gateway;
  • the telecommunication network is provided with a service platform and a wireless sensor network management platform;
  • the WSN terminal authentication network element entity is a wireless sensor network management platform, a service platform or a telecommunication network.
  • Other network element entities in the medium such as a Home Location Register (HLR), a Home Subscriber Server (HSS), and the like.
  • the above WSN terminal joins the wireless sensor network as:
  • the WSN terminal joins the requested wireless sensor network with the network configuration parameters.
  • the WSN terminal is provided with an identity identification module, and the WSN terminal authentication network element entity identifies the WSN terminal by using the information in the identity identification module, and performs identity authentication on the WSN terminal.
  • the setting information of the wireless sensor network that the WSN terminal can join is set in the above service platform or the wireless sensor network management platform.
  • the method further includes:
  • the gateway After receiving the request of the WSN terminal to join the wireless sensor network, the gateway notifies the WSN terminal that the network element entity has a new WSN terminal to join, and carries the identifier information of the WSN terminal and the requested wireless sensor network. Identification information;
  • the WSN terminal authentication network unit entity obtains setting information of the wireless sensor network that the WSN terminal can join, and determines, according to the information, whether the WSN terminal is allowed to join the wireless sensor network that is requested to join, and performs identity authentication on the WSN terminal when allowed. .
  • the WSN terminal information storage unit is configured to store the information of the WSN terminal, including the identifier information of the WSN terminal, the authentication information used by the WSN terminal identity authentication, and the setting information of the wireless sensor network that the WSN terminal can join.
  • the WSN terminal authentication network unit entity obtains, from the WSN terminal information storage unit, setting information of the wireless sensor network that the WSN terminal can join, and WSN terminal authentication related information.
  • the above WSN terminal information storage unit is located in the above wireless sensor network management platform, or in a service platform, or in other network element entities in the telecommunication network.
  • the above wireless sensor networks are networked by the Zigbee standard.
  • the wireless sensor network is a wireless network composed of a group of sensor node devices in a self-organizing manner, and the sensor node devices communicate by short-range wireless communication technology.
  • Wireless sensor networks are typically deployed in areas ranging from a few meters to a few hundred meters, where sensor node devices are typically battery powered, with lower power consumption and cost.
  • Near field communication technology generally uses Zigbee and IEEE 802.15.4 technology.
  • the combination of the wireless sensor network and the telecommunication network refers to connecting the wireless sensor network with the telecommunication network, and using the telecommunication network to enter the wireless sensor network and the services provided by the telecommunication network. It conducts monitoring, management, and implementation of bearer and cooperation of the completed business, and expands the services provided by the wireless sensor network through the telecommunication network.
  • the telecommunication network includes various communication networks such as mobile communication networks, xDSL, FTTx, and satellite communications.
  • the wireless sensor network joins the telecommunication network through the gateway and is connected to the service platform of the telecommunication network and the wireless sensor network management platform via the telecommunication network.
  • the WSN terminal is connected to the telecommunication network platform through a gateway device.
  • the WSN terminal device is a sensor node constituting the wireless sensor network, and is connected to the gateway through one or more hops.
  • the WSN terminal device is responsible for collecting and uploading data, and receiving and executing commands.
  • the devices that make up the WSN are as few as a few hundred.
  • the devices can be networked in a star, tree, or MESH mode. Some of the devices have strong networking and data forwarding capabilities.
  • the WSN terminal is at the very end of the wireless sensor network. Specifically, the WSN terminal is a variety of sensors that perform monitoring tasks, such as a temperature sensor, a humidity sensor, and the like.
  • the gateway is responsible for connecting the wireless sensor network and the telecommunication network, and mainly performs functions such as protocol conversion, address mapping, and data forwarding, and can also integrate functions such as security and charging.
  • the functions that the gateway can support can include: Support internal data collaboration and aggregation in the sensor network; Support one or more of the long-distance communication joining methods such as 2G mobile communication, 3G mobile communication, xDSL, FTTx, broadband wireless join, satellite/microwave, etc.
  • the aggregated data is transmitted to the communication peer; the device platform and the remote management server are supported for device authentication and user authentication of the WSN gateway; the parameters and software configuration of the WSN gateway are supported by the service platform and the remote management server; and user authentication and service security are supported. , equipment management security mechanism.
  • the service platform is a functional entity that operates and manages the common services in the telecommunication network and the wireless sensor network in the telecommunication network, and is responsible for integrating the services provided by the respective service providers and providing them to the end users, and managing the use of the services by the users.
  • the service platform cooperates with other functional entities in the telecommunication network to complete the entire service process according to the needs of different services, such as AAA, Authentication Authorization and Accounting.
  • Business level may also be connected to a remote server to update the business directly.
  • the wireless sensor network management platform is an entity that implements management functions for the wireless sensor network and is composed of a remote management server.
  • the remote management server implements basic management functions for the wireless sensor network over the telecommunications network.
  • the WSN terminal has an identity identification module that can be recognized by the WSN terminal authentication network element entity, and the identity identification module can identify the WSN terminal and authenticate the wireless sensor network device.
  • the WSN terminal authentication network element entity is responsible for authenticating the WSN terminal, and may be a wireless sensor network management platform, a service platform or other network element entity located in the telecommunication network, such as an authentication server responsible for mobile user authentication in the mobile communication network.
  • the identity module may include identification information of the device, a key used for device authentication, and other information.
  • the identity module may be written by a wireless sensor network device provider, and the identity module is also saved by a network entity unit responsible for saving the WSN terminal identity module, which may be a wireless sensor network management platform or a service platform. It is also possible to have other network element entities in the telecommunication network, such as HLR/HSS in a mobile communication network.
  • the identity identification module is securely stored on the WSN terminal and retrieves the encrypted storage method.
  • the confidential information such as the key cannot be read by the outside world or the security identification module can read the identity identification module in the WSN terminal.
  • the wireless sensor network authentication network element entity responsible for WSN terminal authentication may be a wireless sensor network management platform or a service platform, or may be other network element entities in the telecommunication network, such as a GPRS service support node in a mobile communication network (SGSN, Serving)
  • SGSN mobile communication network
  • MME Mobility Management Entity
  • the network element entity responsible for WSN terminal authentication is uniformly named as a WSN terminal authentication unit entity.
  • the WSN terminal When a WSN terminal device joins a wireless sensor network, the WSN terminal first authenticates the network. The unit entity authenticates the WSN terminal. After the authentication is passed, the WSN terminal can join the wireless sensor network. If the authentication fails, the WSN terminal cannot join the wireless sensor network.
  • the WSN terminal When performing WSN terminal authentication, the WSN terminal implements the connection through the gateway and the WSN terminal authentication network unit entity; the WSN terminal authentication uses the identity identification module of the WSN terminal.
  • the WSN terminal When the WSN terminal authenticates with the WSN terminal authentication network element entity, the WSN terminal can establish a secure connection between the WSN terminal and the WSN terminal authentication network element entity by using the identity identification module, and the WSN terminal authentication can be added to the wireless sensor network.
  • the network configuration parameters are securely sent to the WSN terminal, and the WSN terminal joins the wireless sensor network through the network configuration parameters. For a WSN terminal that has not passed the authentication, it cannot join the wireless sensor network because it cannot obtain the wireless sensor network configuration parameters.
  • the wireless sensor network configuration parameters include information such as the network address required to join the wireless sensor network and the relevant key required for the communication connection.
  • the wireless sensor network configuration parameter is a network configuration parameter related to the wireless sensor network required for the WSN terminal to join the wireless sensor network, and may include, but is not limited to, a gateway address, and a key required for verifying the WSN terminal. . WSN terminals that do not have wireless sensor network configuration parameters cannot join the wireless sensor network.
  • the WSN terminal authentication network unit entity can notify the gateway, and then the gateway provides the configuration parameters added to the wireless sensor network and sends the configuration parameters to the WSN terminal.
  • the sending network configuration parameter can be used in two ways. The first method is: the gateway sends the network configuration parameter to the WSN terminal authentication network unit entity, and then the WSN terminal authentication network unit entity sends the network configuration parameter to the WSN terminal; The gateway obtains the relevant key of the secure connection between the WSN terminal authentication network element entity and the WSN terminal, and the gateway sends the network configuration parameter to the WSN terminal.
  • the service platform can configure the relevant service parameters of the WSN terminal and enable the service performed by the WSN terminal.
  • the gateway notifies the wireless sensor network management platform and the service platform, the wireless sensor network management platform records the status of the WSN terminal, and the service platform stops the service performed by the WSN terminal.
  • the wireless sensor network management platform or the service platform can set a wireless sensor network that the WSN terminal can join, thereby realizing restrictions on the use area of the WSN terminal.
  • the WSN terminal authentication network element entity can obtain the setting information of the wireless sensor network that the WSN terminal can join from the wireless sensor network management platform or the service platform, and determine whether the wireless sensor network that the WSN terminal is currently applying to join is To allow for the joining of wireless sensor networks. If the currently applied wireless sensor network is not a wireless sensor network that is allowed to join, the WSN terminal is denied access to the wireless sensor network.
  • the wireless sensor network management platform or the service platform may set the wireless sensor network that the WSN terminal is allowed to join for the WSN terminal, and the setting information may be the network identifier of the wireless sensor network that the WSN terminal can join, and determine the WSN terminal by using the network identifier of the wireless sensor network. Join the wireless sensor network. In this way, the wireless sensor network management platform or service platform can set the area used by the WSN terminal to optimize the management of the WSN terminal.
  • the wireless sensor network is based on Zigbee technology.
  • ZigBee is an emerging short-range, low-rate, low-cost, low-power wireless network technology. It uses Direct Sequence Spread Spectrum (DSSS) technology and operates at 868MHz, 915MHz or 2.4GHz. Configuring wireless domain based on ZigBee technology Network is a new development of short-range wireless communication technology in recent years, and has been widely used in industrial automation and smart home.
  • DSSS Direct Sequence Spread Spectrum
  • ZigBee coordination point There are three types of nodes in the ZigBee network: ZigBee coordination point, ZigBee routing node and ZigBee terminal node.
  • the ZigBee coordination point is also called the Personal Area Network (PAN) coordination point (ZC, ZigBee Coordinator) in IEEE 802.15.4, which can be used in wireless sensor networks.
  • PAN Personal Area Network
  • ZC ZigBee Coordinator
  • the ZigBee coordination point must be a Full Function Device (FFD).
  • FFD Full Function Device
  • a ZigBee network has only one ZigBee coordination point. It is often more powerful than other nodes in the network and is the master node of the entire network. It is responsible for initiating the establishment of new networks, setting network parameters, managing nodes in the network, and storing node information in the network. After the network is formed, it can also perform the functions of the router.
  • the ZigBee coordination point is the most complex of the three types of ZigBee nodes, and is generally powered by AC power.
  • the ZigBee Routing Node (ZR, ZigBee Router) must also be a fully functional device.
  • ZigBee routing nodes can participate in route discovery, message forwarding, and extend the coverage of the network by connecting other nodes.
  • the ZigBee routing node can also act as a common coordination point in its OST (Personal Operating Space) (IEEE 802.15.4 is called coordination point).
  • the normal coordination point is different from the ZigBee coordination point, which is still controlled by the ZigBee coordination point.
  • the ZigBee EndNode (ZE, ZigBee EndDevice) can be a full-featured device or a Reduced Function Device (RFD) that connects to the network through a ZigBee co-node or ZigBee routing node, but does not allow any other node to join the network through it.
  • the ZigBee endpoint can operate at very low power.
  • the gateway acts as a Zigbee coordination point in the Zigbee network and is responsible for the establishment of the wireless sensor network.
  • the WSN terminal can be added to the wireless sensor network as a Zigbee routing node or a Zigbee terminal node. Gateways and WSN terminals need to support Zigbee communication technology.
  • the encryption operation in the Zigbee network uses the Advanced Encryption Standard (AES) algorithm, and the symmetric key length is 128 bits. .
  • the keys used in the Zigbee network mainly include:
  • Master key This key is a shared key used in the process of performing a symmetric key establishment protocol.
  • the master key is the basis for long-term security between the two devices and can be used to generate link keys.
  • Link key In a PAN network, a key shared between two devices for secure communication between two devices.
  • This key is a shared key in a PAN network and is used for the security of broadcast communication.
  • a trust center is a trusted device that distributes security keys across a network. It allows devices to join the network and assign keys, thus ensuring end-to-end security between devices.
  • network coordinators can become trust centers.
  • the Trust Center provides the following three features:
  • Trust management the task is responsible for verifying the device joining the network.
  • Network management the task is to obtain and assign network keys to the device.
  • the task is to bind the application to the device it manages, and achieve end-to-end secure transmission between the two devices.
  • the device In order to implement trust management, the device requires the trust center to receive the initial master key.
  • the device should receive the initial network key and can only obtain updates to the network key from the Trust Center.
  • the device needs to receive a master key or link key from the trust center to establish an end-to-end secure link between the two devices.
  • the additional link key, master key, and network key can only be obtained from the trust center in a secure manner.
  • the trust center should periodically update the network key according to a policy and pass the new network key to each device.
  • the gateway is used as a trust center for security management of the network.
  • the network configuration parameters for implementing secure communication are obtained from the gateway.
  • the network configuration parameters may include a network address, an initial master key, and a network key, and the WSN terminal uses the network configuration parameter to join the wireless sensor.
  • Network and secure communication may include a network address, an initial master key, and a network key, and the WSN terminal uses the network configuration parameter to join the wireless sensor.
  • Network and secure communication may include a network address, an initial master key, and a network key
  • the WSN terminal uses the network configuration parameter to join the wireless sensor.
  • Network and secure communication may include a network address, an initial master key, and a network key
  • the WSN terminal uses the network configuration parameter to join the wireless sensor.
  • Network and secure communication may include a network address, an initial master key, and a network key
  • the WSN terminal uses the network configuration parameter to join the wireless sensor.
  • Network and secure communication may include a network address, an initial master key, and a
  • a certain wireless sensor network is identified by a network identifier of the wireless sensor network.
  • the network identifier of the wireless sensor network may be determined by the gateway or by the wireless sensor network management platform, and the wireless sensor network management platform records related information including the network identifier of the wireless sensor network.
  • the wireless sensor network management platform and other network element entities in the telecommunications network can obtain the network identity of the wireless sensor network when communicating with the gateway.
  • the identity identification module of the terminal in order to implement the security authentication when the WSN terminal joins the wireless sensor network, the identity identification module of the terminal needs to be built in the WSN terminal.
  • the identity module may include network identification parameters such as the identification number of the terminal, the key used for authentication, the length of the key, and an algorithm used.
  • the identity module of the terminal can be written to the WSN terminal in a secure manner by the WSN terminal manufacturer when the WSN terminal is produced. When the WSN terminal manufacturer delivers the WSN terminal, the identity module of the WSN terminal is provided to the wireless device in a secure manner.
  • the sensor network management platform stores the identity module of the WSN terminal by the wireless sensor network management platform, and the identity module can also be saved by other network element entities in the telecommunication network, such as an HLR/HSS server in the telecommunication network.
  • the WSN terminal authentication network unit responsible for WSN terminal authentication can obtain the identity identification module of the WSN terminal in a secure manner from the network element entity responsible for saving the identity module of the WSN terminal.
  • the WSN terminal may be identified in a format similar to the International Mobile Equipment Identity (IMEI).
  • IMEI International Mobile Equipment Identity
  • the key in the WSN terminal identity module can use the 128-bit AES symmetric key, which appropriately reduces the computing power requirement of the WSN terminal.
  • Carrying out the terminal through the key in the identity module The authentication and establishment of a secure communication between the WSN terminal and the WSN terminal authentication network element entity in the telecommunications network based on the key.
  • the terminal performs authentication, and other network element entities may also be used to authenticate the sensing network terminal, such as an SGSN node in the mobile communication network.
  • the following describes the process of joining a WSN terminal to a wireless sensor network in a wireless sensor network formed by Zigbee technology.
  • the present invention uses a wireless sensor network management platform as an example to illustrate the flow of a WSN terminal to join a wireless sensor network.
  • Those skilled in the art should understand that the method provided by the present invention is also suitable for other network element entities such as a home location in a service platform or a telecommunication network. Register (HLR, Home Location Register) / Home Subscriber Server (HSS, Home Subscriber Server), etc.
  • HLR Home Location Register
  • HSS Home Subscriber Server
  • FIG. 2 is a flowchart of a method for a WSN terminal to join a network according to the present invention. As shown in FIG. 2, the process of joining a WSN terminal to a wireless sensor network is as follows:
  • Step 201 The WSN terminal determines a wireless sensor network to join, and sends a request to join the wireless sensor network to the wireless sensor network.
  • the WSN terminal can perform network scanning on the set channel to determine the wireless sensor network to join.
  • the network scan can send a Beacon Request frame on the channel.
  • the device in the wireless sensor network on this channel receives the Beacon Request, if a new WSN terminal is allowed to join the wireless sensor network, it will respond.
  • Beacon frame the Beacon frame contains the address information of the device that sent the frame, and whether other devices are allowed to join in the way of its child nodes.
  • the WSN terminal saves the information of the received Beacon frame in its own neighbor table.
  • the WSN terminal selects the appropriate parent node in the association table and sends an association request to the parent node.
  • Association Request A frame request is added to the wireless sensor network.
  • the parent node device in the wireless sensor network After receiving the request to join the wireless sensor network, the parent node device in the wireless sensor network notifies the gateway of the wireless sensor network that a new wireless sensor network device requests to join the wireless sensor network, and the gateway obtains the device information of the WSN terminal requesting to join the wireless sensor network. , including the identity of the wireless sensor network device.
  • Step 202 The gateway notifies the wireless sensor network management platform that a new WSN terminal requests to join the wireless sensor network, and sends the information of the WSN terminal to the wireless sensor network management platform.
  • Step 203 Perform identity verification between the wireless sensor network management platform and the WSN terminal.
  • the wireless sensor network management platform may send an authentication request to the WSN terminal through the gateway, where the authentication request includes a random number; after receiving the authentication request, the WSN terminal may use the random number and the key in the terminal identity module to perform the operation.
  • the wireless sensor network management platform uses the key of the WSN terminal saved on the network side and the same random number to perform the operation, and then the operation The result is compared with the operation result of the WSN terminal; if the operation result is the same, the WSN terminal passes the authentication, and the operation of step 204 is performed; if the operation result is different, the WSN terminal authentication fails, and the operation of step 205 is performed.
  • the WSN terminal in addition to the wireless sensor network management platform for authenticating the WSN terminal, can also authenticate the wireless sensor network management platform, confirming the authenticity of the identity of the wireless sensor network management platform; authenticating the wireless sensor network
  • the method for managing the platform is similar to the method for authenticating the WSN terminal.
  • the WSN terminal can send an authentication request to the wireless sensor network management platform, and the authentication request includes a random number. After receiving the authentication request, the wireless sensor network management platform uses the WSN mastered by itself.
  • the key of the terminal and the random number in the authentication request are operated, and then the operation result is sent to the WSN terminal through the authentication response message; the WSN terminal performs the operation using the key of the WSN terminal and the same random number, and the operation result is the same as the wireless sensor network. Compare the results of the management platform operations; if the two are the same, you can determine the wireless The authenticity of the sensor network management platform, on the contrary, the wireless sensor network management platform is not the correct management platform.
  • Step 204 After the WSN terminal passes the authentication, the session key required for secure communication can be negotiated between the WSN terminal and the wireless sensor network management platform. Then proceed to the operation in step 206.
  • Key negotiation can use existing symmetric key-based key establishment protocols.
  • the key establishment protocol involves the following three steps: Exchanging temporary data, using the temporary data to generate a session key, and confirming that the key is correctly calculated.
  • the WSN terminal joins the wireless sensor network. End the current process.
  • Step 206 The gateway sends the network network configuration parameters required to join the wireless sensor network to the WSN terminal.
  • the network configuration parameters include the network address, network key, and master key of the WSN terminal in the wireless sensor network.
  • the gateway can use two methods, one of which is: the gateway obtains the session key from the wireless sensor network management platform, and encrypts the network configuration parameters by using the session key, and then sends the configuration parameters to the WSN terminal; Another way is that the gateway submits the network configuration parameters to the wireless sensor network management platform, and the wireless sensor network management platform encrypts the network configuration parameters by using the session key, and then sends the encrypted data to the WSN terminal through the gateway.
  • Step 207 The WSN terminal joins the wireless sensor network by using network configuration parameters.
  • the WSN terminal After receiving the network configuration parameter, the WSN terminal negotiates with the gateway to determine the link key, and the gateway adds the information of the WSN terminal in the node management table, and the parent node device of the WSN terminal saves the WSN terminal in its neighbor table. Information, the WSN terminal saves the information of the parent node and the gateway in its own neighbor table. At this point, the WSN terminal successfully joins the wireless sensor network and becomes a node device in the wireless sensor network, which can enable the sensing function of the WSN terminal, and The sensor data is reported to the wireless sensor network service platform through the gateway.
  • Step 208 The gateway notifies the wireless sensor network management platform that the WSN terminal has joined the wireless sensor network.
  • the wireless sensor network management platform can record the information about the WSN terminal, and send the information of the WSN terminal to the service platform, the service platform configuration and the related data of the WSN terminal, and enable the services supported by the WSN terminal.
  • the wireless sensor network management platform may pre-set one or some wireless sensor networks that the WSN terminal device can join, and the WSN terminal can only join these presets.
  • Wireless sensor networks cannot join other wireless sensor networks.
  • Each wireless sensor network has a unique network identifier after it is created.
  • the wireless sensor network management platform can set a wireless sensor network that a WSN terminal is allowed to join through the network identifier.
  • FIG. 3 is a flowchart of another method for a WSN terminal to join a network according to the present invention. As shown in FIG. 3, when a wireless sensor network that a WSN terminal can join is restricted, a process of joining a WSN terminal to a wireless sensor network is:
  • Step 301 The WSN terminal determines a wireless sensor network to join, and sends a request to join the wireless sensor network to the wireless sensor network.
  • the WSN terminal can perform network scanning on the set channel to determine the wireless sensor network to join.
  • the network scan can send a Beacon Request frame on the channel.
  • the Beacon Request After the device in the wireless sensor network on this channel receives the Beacon Request, if a new WSN terminal is allowed to join the wireless sensor network, the Beacon frame will be responded to. Contains the address information of the device that sent the frame, and whether other devices are allowed to join as their child nodes.
  • the WSN terminal saves the information of the received Beacon frame in its own neighbor table.
  • the WSN terminal selects an appropriate parent node in the association table, and sends an Association Request frame request to the parent node to join the wireless sensor network.
  • the parent node device in the wireless sensor network receives After the request to join the wireless sensor network, the gateway of the wireless sensor network is notified that a new wireless sensor network device requests to join the wireless sensor network, and the gateway obtains device information of the WSN terminal requesting to join the wireless sensor network, including the identifier of the wireless sensor network device. .
  • Step 302 The gateway notifies the wireless sensor network management platform that a new WSN terminal requests to join the wireless sensor network, and sends the information of the WSN terminal to the wireless sensor network management platform.
  • Step 303 The wireless sensor network management platform obtains the network identifier of the wireless sensor network that the WSN terminal is ready to join through the gateway, and compares with the wireless sensor network that the WSN terminal can join in the wireless sensor network management platform, and determines that the WSN terminal is ready to join. Whether the wireless sensor network is a wireless sensor network that is allowed to join. If it is a wireless sensor network that is allowed to join, the operation of step 304 is performed; if it is not allowed to join the wireless sensor network, the operation in step 305 is performed.
  • Step 304 Perform identity verification between the wireless sensor network management platform and the WSN terminal.
  • the wireless sensor network management platform may send an authentication request to the WSN terminal through the gateway, where the authentication request includes a random number; after receiving the authentication request, the WSN terminal may use the random number and the key in the terminal identity module to perform the operation. Sending the result to the wireless sensor network management platform through the authentication response; after receiving the authentication response, the wireless sensor network management platform uses the key of the WSN terminal saved by the network side and the same random number to perform the operation, and then the operation result is obtained.
  • step 306 Comparing with the operation result of the WSN terminal; if the operation result is the same, the WSN terminal passes the authentication, and the operation of step 306 is performed; if the operation result is different, the WSN terminal authentication fails, and the operation of step 307 is performed.
  • Step 305 The wireless sensor network that the WSN terminal applies for joining is a network that is not allowed to join.
  • the wireless sensor network management platform notifies the gateway that the WSN terminal is not allowed to join the wireless sensor network, and the gateway rejects the WSN terminal to join the wireless sensor network.
  • the current processing flow ends.
  • Step 306 After the WSN terminal passes the authentication, the session key required for secure communication can be negotiated between the WSN terminal and the wireless sensor network management platform. Then proceed to step 308 The operation in .
  • Key negotiation can use existing symmetric key-based key establishment protocols.
  • the key establishment protocol involves the following three steps: Exchanging temporary data, using the temporary data to generate a session key, and confirming that the key is correctly calculated.
  • Step 307 The gateway sends the result of the authentication failure to the gateway, and the gateway rejects the WSN terminal to join the wireless sensor network. The current processing flow ends.
  • Step 308 The gateway sends the network network configuration parameters required to join the wireless sensor network to the WSN terminal.
  • the network configuration parameters include the network address, network key, and master key of the WSN terminal in the wireless sensor network.
  • the gateway can use two methods, one of which is: the gateway obtains the session key from the wireless sensor network management platform, and encrypts the network configuration parameters by using the session key, and then sends the configuration parameters to the WSN terminal; Another way is that the gateway submits the network configuration parameters to the wireless sensor network management platform, and the wireless sensor network management platform encrypts the network configuration parameters by using the session key, and then sends the encrypted data to the WSN terminal through the gateway.
  • Step 309 The WSN terminal joins the wireless sensor network by using network configuration parameters.
  • the WSN terminal After receiving the network configuration parameter, the WSN terminal negotiates with the gateway to determine the link key, and the gateway adds the information of the WSN terminal in the node management table, and the parent node device of the WSN terminal saves the WSN terminal in its neighbor table. Information, the WSN terminal saves the information of the parent node and the gateway in its own neighbor table. At this point, the WSN terminal successfully joins the wireless sensor network and becomes a node device in the wireless sensor network. It can enable the sensing function of the WSN terminal and report the sensing data to the wireless sensor network service platform through the gateway.
  • Step 3010 The gateway notifies the wireless sensor network management platform that the WSN terminal has joined the wireless sensor network.
  • the wireless sensor network management platform can record information about the WSN terminal and will WSN The information of the terminal is sent to the service platform, the service platform configuration and related data of the WSN terminal, and the services supported by the WSN terminal are enabled.
  • the service platform can also replace the wireless sensor network management platform to set one or some wireless sensor networks that the WSN terminal device can join.
  • the wireless sensor network management platform obtains setting information of one or some wireless sensor networks that the WSN terminal device can join from the service platform.
  • the gateway when the terminal joining the wireless sensor network leaves the wireless sensor network, the gateway needs to send a message to notify the wireless sensor network management platform, the wireless sensor network management platform records the state of the WSN terminal, and notifies the wireless sensor network service platform, and the service platform stops. Use the services associated with the WSN terminal.
  • the WSN terminal can notify the gateway that it has left the wireless sensor network by leaving the Leave command frame.
  • the gateway performs the related operations of the WSN terminal leaving the network and notifies the wireless sensor network management platform.
  • the WSN terminal can authenticate the WSN terminal by the WSN terminal authentication network element entity when the WSN terminal joins the wireless sensor network, so as to prevent the unauthenticated WSN terminal from joining the wireless sensor network.
  • the wireless sensor network configuration parameters can be sent to the WSN terminal in a secure manner, thereby avoiding leakage of the wireless sensor network configuration parameters, thereby establishing a secure wireless sensor network.
  • a wireless sensor network that the WSN terminal can join can be set, so that the limitation of the area allowed for the WSN terminal can be realized.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé permettant à un terminal de capteurs sans fil (WSN) de se joindre au réseau. Le procédé s'applique à un réseau de combinaison comportant un réseau WSN et un réseau de télécommunications et une entité d'unité de réseau d'authentification de terminal de réseau WSN. Le procédé comprend les étapes suivantes: l'entité d'unité de réseau d'authentification de terminal de réseau WSN effectue une authentification d'identité pour le terminal de réseau WSN, et suite à une authentification réussie, autorise le terminal de réseau WSN à se joindre au réseau WSN ; et ensuite le terminal de réseau WSN se joint au réseau. L'invention concerne également un réseau de combinaison. L'invention assure la sécurité du réseau WSN dans le réseau de combinaison.
PCT/CN2010/076699 2010-03-23 2010-09-07 Réseau de combinaison et procédé permettant à un terminal de capteurs sans fil de se joindre au réseau WO2011116589A1 (fr)

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