WO2012126208A1

WO2012126208A1 - Method and system for wireless sensor network connecting to telecommunication network

Info

Publication number: WO2012126208A1
Application number: PCT/CN2011/075974
Authority: WO
Inventors: 马景旺
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-03-18
Filing date: 2011-06-20
Publication date: 2012-09-27
Also published as: CN102685787A

Abstract

A method for a Wireless Sensor Network (WSN) connecting to a telecommunication network is disclosed in the present invention, wherein a WSN terminal and more than two WSN gateways are set in the WSN, and a main gateway is set in the more than two WSN gateways; a management platform is set in the telecommunication network; the method still comprises the following steps that: when the main gateway cannot work normally, one of the secondary gateways in the WSN is made as a main gateway to replace the original main gateway to perform work. A WSN connecting to a telecommunication network for realizing the above method is disclosed in the present invention simultaneously. In the present invention, when the main gateway is broken and can not perform work normally, one of the secondary gateways can replace the main gateway and work as a main gateway, so that the WSN and the relational service thereof can operate normally, thus improving the reliability of the Wireless Sensor Network which is collocated multi gateways.

Description

Method and system for wireless sensor network accessing telecommunication network

The present invention relates to an access technology in a combined network, and more particularly to a method and system for a wireless sensor network to access a telecommunications network. Background technique

As a product of the combination of computing, communication and sensor technologies, 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. In terms of communication methods, although wired, wireless, infrared, and optical formats can be used, it is generally considered that short-range wireless low-power communication technology is most suitable for the use of sensor networks, generally called wireless sensor networks. ( WSN, Wireless Sensor Network ) „ The current 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.

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.

The combination of wireless sensor networks and telecommunication networks, 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., can make wireless sensor networks an extension of existing networks, expand the capabilities of communication networks, and enable communication objects to extend from people to the physical world. Development prospects. When combined with the existing telecommunication network, 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 be greatly changed. Wireless sensor network The centralized management of the network solves the problem that the wireless sensor networks that are currently scattered everywhere are difficult to manage.

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. The combination of a wireless sensor network and a telecommunications network 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 WSN and is connected to the gateway by one or more hops. The WSN terminal is responsible for collecting and uploading data, as well as receiving and executing commands. The WSN terminals that make up the WSN are as few as a few hundreds, and WSN terminals can be networked in a star, tree or mesh manner, some of which have strong groups. Network and data forwarding capabilities. In the WSN, the gateway is responsible for transmitting the data reported by the WSN terminal to the relevant network unit in the telecommunication network, and the relevant network unit in the telecommunication network sends the relevant command to the WSN terminal through the gateway. Moreover, when the WSN uses the commonly used IEEE 802.15.4 and Zigbee technologies, the gateway is generally responsible for creating the WSN, which is responsible for the management of the WSN terminal when joining and leaving the sensor network, and the configuration information of the WSN terminal and the sensor network are stored in the gateway. Important data such as business configuration information.

The data reported by the WSN terminal needs to be sent to the relevant network unit in the telecommunication network through the gateway, and the existing WSN usually only configures one gateway for forwarding the data reported by the WSN terminal to the relevant network unit in the telecommunication network, so that When the number of WSN terminals in the WSN is relatively large, or when the WSN terminal frequently reports data, the gateway load in the WSN is so large that the data of the WSN terminal cannot be sent in time and the communication between the WSN terminal and the gateway is congested. This will seriously affect the normal operation of the WSN. In addition, when the network unit on the telecommunication network side performs management of the WSN terminal in the wireless sensor network, it is required to establish communication with the WSN terminal through the gateway of the wireless sensor network; if the gateway unit on the telecommunication network side only passes through one gateway and the wireless sensor network The WSN terminal in the establishment of communication will also cause a relatively large load on the gateway. The force causes the gateway unit on the telecommunication network side to fail to establish communication with the WSN terminal in the wireless sensor network in time, which affects the normal operation of related services. Therefore, it is necessary to consider how the relevant network element on the telecommunication network side performs more smooth communication with the WSN terminal in the wireless sensor network through the WSN gateway. For this problem, a feasible solution is to configure multiple gateways in the wireless sensor network. The WSN terminals in the wireless sensors communicate with the WSN terminals through the gateways and the network elements on the telecommunication network side through these gateways. The multiple gateways configured in the wireless sensor network can use the master-slave gateway working mode, with one gateway as the primary gateway and the remaining gateways as the slave gateways; the primary gateway is responsible for creating the creation and management of the wireless sensor network, and the primary gateway is assigned to the WSN terminal. Accessing the gateway used by the telecommunication network, the allocated gateway may be the primary gateway, or may be one of the secondary gateways, and the WSN terminal accesses the telecommunication network through the allocated gateway, and the secondary gateway is the WSN terminal according to the scheduling of the primary gateway. Provide telecommunications network access. Therefore, in this solution, the primary gateway plays an important role in the normal operation of the wireless sensor network. If the primary gateway is in a faulty situation and causes it to malfunction, the wireless sensor network and related services will not operate normally. A corresponding solution is needed. When the primary gateway fails, the relevant methods are used to make the wireless sensor network and its Related business can work normally. There is currently no corresponding solution to this problem. Summary of the invention

In view of this, the main object of the present invention is to provide a method and system for a wireless sensor network to access a telecommunications network, which can timely confirm a new primary gateway when the primary gateway fails without affecting communication between the WSN and the telecommunications network.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A method for a wireless sensor network to access a telecommunication network, wherein the WSN is provided with a WSN terminal and two or more WSN gateways, and the two or more WSN gateways are provided with a main gateway; the telecommunication network is provided with management Platform; the method further includes:

When the primary gateway fails to work normally, one of the WSNs is used as a primary network from the gateway. Off, instead of working with the original primary gateway.

Preferably, the one of the WSNs is used as a primary gateway instead of the original primary gateway, and is:

The slave gateway replacing the original primary gateway is designated by the management platform, and the slave gateway works in place of the original master gateway.

Preferably, the management platform specifies a slave gateway that replaces the original primary gateway, and is:

After the management platform determines that the primary gateway in the WSN is not working properly, the slave gateway of the replacement primary gateway in the WSN is further determined, and the determined secondary gateway is notified as the primary gateway to work instead of the original primary gateway.

The slave gateway in the WSN negotiates to determine a new master gateway to work in place of the original master gateway. Preferably, the one of the WSNs is used as a primary gateway instead of the original primary gateway, and is:

Determining a backup gateway of the primary gateway in the WSN, and setting a priority for the backup gateway, and sending the information of the backup gateway priority to each slave gateway and the management platform; The gateway or the management platform notifies the failure gateway of the primary gateway to the backup gateway with the highest priority of the backup gateway, and the backup gateway with the highest priority replaces the original primary gateway.

Preferably, the method further includes:

The management platform stores backup information of the primary gateway;

When the slave gateway replaces the original master gateway, the management platform sends the stored backup information of the master gateway to the slave gateway replacing the original master gateway, and the slave gateway replacing the original master gateway uses the backup information of the original master gateway to work in the WSN.

Preferably, the method further includes: After the gateway replaces the original primary gateway, a broadcast message is sent in the WSN, and the information of the new primary gateway is notified to the WSN terminal and the remaining slave gateways of the WSN.

Preferably, the management platform stores backup information of the primary gateway and the secondary gateway; the backup information of the primary gateway includes configuration information of the WSN, correspondence information between the WSN terminal and the gateway allocated for the WSN terminal; The configuration information of the WSN includes the identifier of the WSN, the network topology information, the slave gateway information, the information of the WSN terminal, and the network security setting information. The backup information of the slave gateway includes the gateway information, and the WSN of the telecommunication network accessed through the slave gateway. Information about the terminal; wherein the slave gateway information includes slave gateway identification information and address information, and the information of the WSN terminal includes WSN terminal identification information and address information.

Preferably, the method further includes:

The new primary gateway determines, according to the correspondence information between the obtained WSN terminal and the gateway allocated for the WSN terminal, that the WSN terminal accessing the telecommunication network through the original primary gateway exists for the WSN terminal accessing the telecommunication network through the original primary gateway. Assign a gateway to the telecommunications network.

A system for accessing a telecommunication network by a wireless sensor network, wherein the WSN is provided with a WSN terminal and two or more WSN gateways, and the two or more WSN gateways are provided with a main gateway; the telecommunication network is provided with management a platform; the system includes a determining unit and a replacing unit, wherein

a determining unit, configured to: when the primary gateway is not working properly, trigger a replacement unit; and the replacing unit is configured to use one of the WSNs as a primary gateway instead of the original primary gateway to work.

Preferably, the determining unit is disposed in the management platform, after determining that the primary gateway in the WSN is not working normally, further determining a secondary gateway of the replacement primary gateway in the WSN, and notifying by the proxy unit The slave gateway acts as the master gateway, replacing the original master gateway.

Preferably, the replacing unit is disposed in the slave gateway; after the determining unit determines that the master gateway in the WSN is unable to work normally, the replacing unit further determines through the slave gateway in the WSN. A new master gateway is used instead of the original master gateway.

Preferably, the system further includes a setting unit and a sending unit, where

a setting unit, configured to determine a backup gateway of the primary gateway in the WSN in advance, and set a priority for the backup gateway;

a sending unit, configured to send information about the priority of the backup gateway to each slave gateway and the management platform;

The replacement unit is disposed in a slave gateway or a management platform;

When the determining unit determines that the primary gateway is not working properly, the replacing unit is further configured to notify the backup gateway with the highest priority of the backup gateway as the fault information of the primary gateway, and replace the original primary gateway with the backup gateway with the highest priority. jobs.

Preferably, the management platform stores backup information of the primary gateway;

When the replacing unit replaces the original primary gateway from the gateway, the management platform sends the stored backup information of the primary gateway to the secondary gateway replacing the original primary gateway, and the secondary gateway replacing the original primary gateway uses the backup information of the original primary gateway in the WSN. working.

Preferably, the system further includes a broadcast unit, configured to send a broadcast message in the WSN after the substitute unit replaces the original primary gateway, and notify the WSN terminal and the remaining slave gateways of the WSN of the information of the new primary gateway. .

In the present invention, multiple gateways are configured in one WSN, and multiple gateways use a master-slave working mode, and the multiple gateways respectively provide access to the telecommunication network for the WSN terminal in the WSN, and cannot be normal when the primary gateway fails. When working, the master gateway can be replaced by one of the slave gateways, and the slave gateway works instead of the original master gateway, so that the wireless sensor network and related services can operate normally, thereby improving the reliability of the wireless sensor network configuring multiple gateways. Sex. DRAWINGS

FIG. 1 is a schematic diagram of a network architecture when multiple gateways exist in a WSN;

2 is a flowchart of configuring a multi-gateway for a WSN according to Embodiment 1 of the present invention; 3 is a flow chart of allocating a gateway to a WSN terminal when the WSN terminal joins the WSN and uses the working mode of the master-slave gateway according to the second embodiment of the present invention;

4 is a flowchart of a slave gateway replacing a master gateway in a WSN according to Embodiment 3 of the present invention; FIG. 5 is a flowchart of a slave gateway replacing a master gateway in a WSN according to Embodiment 4 of the present invention; FIG. 6 is a wireless sensor network according to the present invention; Schematic diagram of the structure of a system for accessing a telecommunications network. detailed description

The basic idea of the present invention is: in a wireless sensor network configured with multiple gateways and using a master-slave gateway working mode, when the primary gateway fails to work normally, it is determined that one slave gateway in the wireless sensor network replaces the master gateway, The determined slave gateway acts as a new master gateway in the wireless sensor network, thereby improving the communication reliability of the wireless sensor network.

The present invention will be further described in detail below with reference to the accompanying drawings.

In the multiple gateways configured by the WSN in the present invention, communication is performed in a master-slave gateway working mode, wherein one gateway is set as the primary gateway, and the remaining gateways are slave gateways. The primary gateway determines the gateway used by the WSN terminal in the WSN to access the telecommunication network, and the WSN terminal accesses the telecommunication network through the gateway designated by the primary gateway. It should be noted that the designated gateway may be the primary gateway itself or one of the secondary gateways. The telecommunications network access is provided from the WSN terminal designated by the gateway (including the main gateway itself) as the primary gateway.

The primary gateway is responsible for the creation of the WSN, and the gateway is added to the WSN as a routing node in the WSN. When the gateway joins the WSN, it needs to be registered on the management platform of the telecommunication network. The management platform records related information of the slave gateway, including at least the identifier of the gateway, the address of the slave gateway in the telecommunication network, and the like, and is notified by the management platform. The primary gateway in the WSN has a new slave gateway joining the WSN. After the gateway joins the WSN, the master gateway records the information of the slave gateway. The information of the slave gateway may include: an address from the gateway in the WSN, an address of the slave gateway in the telecommunication network, and a telecommunication network access that the slave gateway can provide. Ability and so on. If the address from the gateway in the WSN and If the address in the telecommunications network uses the same address, then the primary gateway only needs to record the address. The communication between the primary gateway and the secondary gateway can be carried out through the WSN or through the telecommunications network.

When the WSN terminal joins the WSN, the primary gateway allocates the gateway used by the access telecommunication network to the WSN terminal according to the relevant rules assigned by the gateway, and the allocated gateway may be the primary gateway or the secondary gateway. The primary gateway can determine the gateway used by the WSN node to access the telecommunication network according to the topology of the network, the load balancing between the gateways, and the length of the route from the WSN node to the gateway, such as preferentially assigning WSN terminals to the WSN terminal. The gateway of the same domain is used as a gateway for accessing the telecommunication network, or the WSN terminal is preferentially assigned a gateway with a lighter current load, or the WSN terminal is preferentially allocated to a gateway whose access to the telecommunication network is not greater than a set threshold; Of course, the WSN terminal can be allocated a gateway for accessing the telecommunication network by referring to the above-mentioned gateway allocation rule. When the gateway is allocated, the primary gateway provides the information of the assigned gateway (such as the address of the gateway in the WSN) to the WSN terminal, and the WSN terminal saves the information of the assigned gateway and creates routing information to the gateway; The information of the WSN terminal (including the identifier of the WSN terminal, the address of the WSN terminal in the WSN) is provided to the assigned gateway, and the assigned gateway records the information of the WSN terminal.

The primary gateway saves the correspondence between the WSN terminal in the WSN and its assigned gateway, and sends the information of the corresponding relationship to the management platform of the telecommunication network, and the management platform saves the information of the corresponding relationship. The correspondence may be implemented in the form of a correspondence table in which the identifier of the WSN terminal and the identity of the gateway to which it is assigned are recorded. The corresponding relationship can be used to query the gateway used by a certain WSN terminal to access the telecommunication network, and a gateway in the WSN provides telecommunication network access for which WSN terminals in the WSN.

In addition, after the WSN terminal joins the WSN, the primary gateway can change the gateway used by the WSN terminal to access the telecommunication network. The newly designated gateway of the primary gateway provides the TSN terminal with telecommunication network access, and the original gateway no longer provides telecommunication network access for the WSN terminal.

When the WSN terminal leaves the WSN, the primary gateway and the WSN terminal access the telecommunication network. The gateway can clear the information of the WSN terminal saved by the WSN terminal, and the gateway corresponding to the WSN terminal does not provide the TSN terminal with the telecommunication network access after the WSN terminal leaves the WSN.

Before the WSN terminal joins the WSN, the management platform may write the network configuration parameters required for joining the WSN in the WSN terminal through the client or other manner, and the network configuration parameter may be used by the management platform from the WSN terminal to join the primary gateway in the WSN. Obtained. When the WSN terminal joins the WSN, it submits a request to join the WSN to the primary gateway, where the request includes information such as the identifier of the WSN terminal, and the primary gateway can send the information of the WSN terminal to the management platform. The WSN terminal is authenticated by the primary gateway or the management platform, and the WSN terminal is allowed to join the WSN after the verification is passed, and the WSN terminal is allocated by the primary gateway to the gateway used for accessing the telecommunication network.

The management platform in the telecommunication network stores the correspondence between the WSN terminal in the WSN and its assigned gateway. If a network element (such as a service platform) in the telecommunication network is ready to establish communication with the WSN terminal in the WSN, the network element in the telecommunication network can obtain information (such as a gateway) of the gateway used by the WSN terminal to access the telecommunication network from the management platform. Address information, identification information, etc.), and then communicate with the WSN terminal through the gateway.

To increase the reliability of the wireless sensor network, configuration information or other information of the wireless sensor network in the primary gateway and the secondary gateway can be backed up and stored on the management platform. The primary and secondary gateways can send data that needs to be backed up to the management platform and stored by the management platform.

In the present invention, the backup data of the primary gateway includes, but is not limited to, configuration information of the wireless sensor network, correspondence information between the WSN terminal and its assigned gateway; configuration information of the wireless sensor network includes the identifier of the wireless sensor network, and the network. Topological information, information from the gateway and the WSN terminal (including information such as identification, address, etc.), network security setting information, etc.; correspondence information between the WSN terminal and its assigned gateway is used to record the WSN terminal access to the telecommunications network. Gateway. The backup data of the slave gateway includes but is not limited to: the identity and address of the slave gateway, the information of the WSN terminal of the telecommunications network accessed through the slave gateway, and the like. After the wireless sensor is configured with multiple gateways, the primary gateway may fail, and the primary gateway may not work properly. Since the main gateway plays an important role, it assumes the function of wireless sensor network management. When the main gateway fails to work normally, it needs to take necessary measures to make up for it.

In the present invention, when the primary gateway is not functioning properly, the secondary gateway is replaced by a secondary gateway in the wireless sensor network, and the secondary gateway operates as a primary gateway in the wireless sensor network.

In the present invention, the slave gateway that replaces the master gateway can be specified by the management platform. After the management platform determines that the primary gateway is not working properly, it determines the secondary gateway of the replacement primary gateway in the wireless sensor network, and notifies the secondary gateway to operate as the primary gateway in the wireless sensor network.

In order to implement the failure of the primary gateway, the management platform can obtain the fault information of the primary gateway in time and take relevant measures. The management platform can determine whether the primary gateway can work normally by the following methods:

1. When the primary gateway fails but can still communicate with the management platform of the telecommunication network, the primary gateway notifies the management platform of the fault information;

2. The management platform periodically checks the gateway of the wireless sensor network, and detects that the primary gateway is faulty;

3. The gateway detects that the primary gateway is faulty, and notifies the management platform of the fault information;

4. The WSN terminal detects that the primary gateway has failed, and notifies the fault information (such as notification from the gateway through its own access) management platform.

After the management platform determines that the primary gateway in the wireless sensor network is not working properly, a slave gateway may be selected from the multiple slave gateways of the wireless sensor network, and the slave gateway replaces the master gateway, and the slave gateway acts as a new master gateway in the wireless Work in the sensor network.

In the present invention, in addition to specifying a new primary gateway by the management platform, a new primary gateway may also be negotiated by the secondary gateway. The primary gateway may preset the backup gateway priority of the secondary gateway in the wireless sensor, and send the information of the backup gateway priority of each slave gateway to each slave gateway and the management platform. When the primary gateway is not working properly, when the gateway or management platform detects an abnormality of the primary gateway, The fault information of the primary gateway is notified to the secondary gateway with the highest priority of the backup gateway, and the secondary gateway with the highest priority of the backup gateway replaces the current active gateway that cannot work normally.

In order to realize that the slave gateway functions as a new master gateway in the wireless sensor network, the slave gateway needs to obtain and use configuration information of the wireless sensor network, correspondence information between the WSN terminal and its assigned gateway, and the like. The information is backed up by the original master gateway on the management platform, and the backup information of the master gateway can be provided by the management platform to the slave gateway, and the slave gateway works as a new master gateway in the wireless sensor network using the backup information.

After the gateway replaces the original primary gateway, the secondary gateway sends a broadcast message in the wireless sensor network, and notifies the WSN terminal and other secondary gateways of the change of the primary gateway.

The new primary gateway determines, according to the correspondence information between the obtained WSN terminal and its assigned gateway, whether there is a WSN terminal accessing the telecommunication network through the original primary gateway; if yes, the new primary gateway reassigns the WSN terminal The WSN terminal that enters the gateway used by the telecommunication network accesses the telecommunication network through the newly assigned gateway.

When the WSN and the telecommunication network are combined, multiple gateways are configured in the WSN, and multiple gateways use the master-slave working mode, and multiple gateways respectively provide access to the telecommunication network for the WSN terminal in the WSN, and when the primary gateway fails When the system fails to work normally, the master gateway can be replaced by one of the slave gateways, and the slave gateway acts as a master gateway in the wireless sensor network, so that the wireless sensor network and related services can operate normally, and the configuration is improved. The reliability of the gateway's wireless sensor network.

The WSN of the present invention is a wireless network composed of a group of wireless sensor node devices, such as WSN terminals, in an ad hoc manner or a pre-configured manner; WSN terminals communicate by short-range wireless communication technology. WSNs are typically deployed in areas ranging from a few meters to a few hundred meters, where WSN terminals are typically battery powered, with lower power and cost. Near field communication technology generally uses Zigbee and IEEE 802.15.4 technology.

The combination of WSN and telecommunication network refers to connecting WSN with telecommunication network and utilizing telecommunication network. The network monitors, manages and completes the service bearer and cooperation implementation of the WSN and the services it provides, and extends the services provided by the WSN through the telecommunication network. The telecommunication network includes various communication networks such as mobile communication networks, xDSL, FTTx, and satellite communications.

In this embodiment, when the WSN is combined with the telecommunication network, FIG. 1 is a schematic diagram of a network architecture when multiple gateways exist in the WSN. As shown in FIG. 1, in FIG. 1, the shaded portions filled with cross lines indicate multiple WSN terminals. The shaded portion filled with dots indicates the area where multiple WSN terminals are located. In Figure 1, the WSN is composed of multiple WSN terminals and multiple gateways. Multiple WSN terminals and multiple gateways can be used to set up wireless sensor networks according to the relevant technical standards of WSN. The short-range communication technologies that can be used to form WSNs include Zigbee technology and IEEE. 802.15.4 standard, etc. The WSN connects to the telecommunication network through multiple gateways, and establishes communication with the management platform in the telecommunication network. Among them, the working mode of the master-slave gateway is used between multiple gateways.

In order to realize the connection between the WSN and the telecommunication network, the WSN accesses the telecommunication network through multiple gateways, and is connected to the access network, the core network, the service platform, and the management platform via the telecommunication network. The WSN terminal is connected to the telecommunications network through a plurality of gateways. The WSN terminal is a sensor node constituting the WSN and is connected to the gateway by one or more hops. The WSN terminal is responsible for collecting and uploading data, as well as receiving and executing commands. The WSN terminals that make up the WSN are as few as a few hundreds, and the WSN terminals can be networked in a star, tree or mesh manner, some of which have strong groups. Network and data forwarding capabilities.

The gateway is responsible for connecting the WSN 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 billing. The functions supported by the gateway can include: Support internal data coordination and aggregation in the sensor network; Support second-generation (2G, 2nd Generation) mobile communication, third-generation (3G, 3rd Generation) mobile communication, xDSL, FTTx, broadband wireless access And one or more of long-distance communication access methods such as satellite/microwave, transmitting aggregated data to the communication peer; supporting service platform and remote management server to device authentication and user authentication of the gateway; supporting service platform and remote management Server-to-gateway parameters and software configuration; support User authentication and business security, device management security mechanisms.

The service platform is a functional entity that operates and manages the services combined with the WSN in the telecommunication network. It is responsible for integrating the services provided by the various service providers and providing them to the end users, and managing the use of the services by the terminal users. The service platform cooperates with other functional entities in the telecommunication network to complete the entire business process according to the needs of different services, such as AAA, Authentication Authorization and Accounting (AAA). The business platform can also be connected to a remote server to update the business directly.

The management platform is an entity that implements management functions for the WSN. The management platform can be composed of a management server that implements management functions for the WSN through the telecommunication network.

Based on the above network structure, how the wireless sensor network of the present invention accesses the telecommunication network when the primary gateway fails to operate normally is further described in detail.

Embodiment 1

In the first embodiment of the present invention, a WSN is first created by a gateway in a plurality of gateways. After the WSN is created, the gateway sends the information of the WSN (such as the network identifier of the WSN) to the management platform, and the management platform saves the WSN and the gateway. information. In the present invention, the gateway having the WSN capability is the master gateway, and the other gateways are the slave gateways. This example is for the scenario where the WSN is initially established, that is, the primary gateway is responsible for the rest of the access from the gateway. It should be noted that, after the WSN is established, when a new gateway is added, the manner of updating the newly added gateway is basically the same as the new gateway joining manner described in this example, and the implementation details are not repeatedly described in the present invention.

2 is a flowchart of configuring a multi-gateway for a WSN according to Embodiment 1 of the present invention. As shown in FIG. 2, the process of configuring a multi-gateway by the WSN of the present invention specifically includes the following steps:

Step 201: Other gateways (ie, other gateways other than the primary gateway, also called new gateways) are connected to the management platform through the communication provided by the telecommunication network, and are registered.

Here, after the new gateway is installed and added to the WSN area, the new gateway can establish a communication connection with the management platform through the telecommunication network, and send a registration request to the management platform. Management platform can pass new The identity of the gateway is authenticated to determine the authenticity of the new gateway identity. The information of the new gateway is pre-stored in the management platform, and the information includes the network access capability parameter of the new gateway, the location of the installation, and the like.

Step 202: The management platform notifies the primary gateway in the WSN that a new gateway applies to join the WSN.

Here, the management platform determines the WSN that the new gateway is ready to join according to the location where the new gateway is to be installed, and then notifies the primary gateway in the WSN that a new gateway applies to join the WSN. The management platform can simultaneously send the information of the new gateway to the primary gateway. The information of the new gateway may include: an address of the new gateway in the telecommunication network, a network access capability parameter, and the like.

Step 203: The primary gateway sends the network configuration parameters required to join the WSN to the registered new gateway.

Here, the primary gateway adds the network configuration parameters required by the new gateway to the WSN to the management platform, and then the management platform sends the network configuration parameters and the address of the primary gateway in the telecommunication network to the new gateway. The network configuration parameters here include the address of the primary gateway in the WSN, the initial master key, and so on.

Step 204: The new gateway joins the WSN by using the obtained network configuration parameters.

Here, after obtaining the network configuration parameter of the WSN, the new gateway performs channel scanning in the coverage area of the WSN, and then sends an association request (Association Request) frame to the primary gateway, requesting to join the WSN. The new gateway and the primary gateway negotiate based on the initial master key to determine the network key, link key, and address. The new gateway records its own address and related routing information in the WSN, and the primary gateway records the address of the new gateway in the WSN and the information of the new gateway.

After the gateway joins the WSN, the gateway can communicate and exchange related data through the WSN. The address of the gateway in the telecommunication network can use the IP address. Since the gateway stores the IP address of the opposite party in the telecommunication network, the two parties can also communicate through the telecommunication network.

Through the foregoing embodiment 1, multiple gateways can be configured in the WSN. In the Zigbee network, in order to enable the WSN terminal to join the WSN, the WSN terminal needs to obtain the network configuration parameters required to join the WSN from the management platform. The network configuration parameters include: the initial master key of the WSN to be joined and the address of the primary gateway. When the WSN terminal joins the WSN, the primary gateway verifies the authenticity of the initial master key of the WSN terminal, thereby verifying the identity of the WSN terminal. If the initial master key of the WSN terminal is correct, the WSN terminal is allowed to join the WSN, and the WSN terminal and the primary gateway can negotiate based on the initial master key to determine the link key and network secret required to join the WSN. The key and the address, etc., thereby enabling the WSN terminal to successfully join the WSN. When a WSN terminal that does not have the network configuration parameter applies to join the WSN, the primary gateway rejects the WSN terminal to join the WSN because the initial master key cannot be provided or the initial master key is not the correct key.

Here, when the WSN terminal manufacturer produces the WSN terminal, the network configuration parameter of the WSN is not written in the WSN terminal, and the WSN terminal can write the WSN terminal through the client or other means before the WSN terminal is put into use. The network configuration parameters of the WSN to be joined. The management platform can obtain the network configuration parameters required to join the WSN from the primary gateway.

It should be noted that the management platform can obtain the network configuration parameters of the WSN in two ways. The first mode is: the management platform sends a request for acquiring the WSN network configuration parameter to the primary gateway, and the primary gateway provides the network configuration parameter required by the WSN terminal to join the WSN. The second way is as follows: After the WSN is created, the primary gateway will add the network configuration parameters required by the WSN to the management platform and save it on the management platform.

Embodiment 2

The second embodiment of the present invention describes a process of allocating a gateway for the WSN terminal when the WSN terminal joins the WSN and uses the working mode of the master and slave gateways in the WSN formed by the Zigbee technology. FIG. 3 is a flowchart of allocating a gateway to a WSN terminal when the WSN terminal joins the WSN and uses the working mode of the master-slave gateway according to the second embodiment of the present invention. As shown in FIG. 3, the step of allocating the gateway for the WSN terminal includes the following steps: Step 301: Write, in the WSN terminal, a network configuration parameter of the WSN to which the WSN terminal applies for joining.

Step 302: The WSN terminal applies to the WSN by using the network configuration parameter of the WSN, and the primary gateway verifies the WSN terminal. If the verification succeeds, step 303 is performed; if the verification fails, step 304 is performed.

In this step, the WSN terminal is placed in the area covered by the WSN to be joined. After the WSN terminal is powered on, the WSN terminal can perform network scanning on the set channel to determine the WSN to be added. The network scan can send a Beacon Request frame on the channel. After the device in the WSN on the channel receives the Beacon Request, if a new WSN terminal is allowed to join the WSN, it will respond to the Beacon frame. The Beacon frame contains the address information of the WSN terminal that sent the frame, and whether other WSN terminals are allowed to join in the manner of their child nodes. The WSN terminal saves the information of the received Beacon frame in its own neighbor table.

Here, 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 WSN. After receiving the request to join the WSN, the WSN terminal at the parent node of the WSN notifies the WSN of the primary gateway that a new WSN terminal requests to join the WSN.

The WSN's primary gateway authenticates the WSN terminal. The authentication mode can be based on the way the node device joins the network in the Zigbee specification. The primary gateway determines the authenticity of the initial master key in the WSN terminal. If the WSN terminal passes the verification, the operation of step 303 is performed; if the WSN terminal fails to verify, the operation of step 304 is performed.

Step 303: After the WSN terminal passes the verification, the communication protocol negotiates with the primary gateway to determine the link key and the network key, and the primary gateway adds the information of the WSN terminal in the node management table, and the parent node device of the WSN terminal is in its neighbor table. The information of the WSN terminal is saved, and the WSN terminal saves the information of the parent node and the master gateway in its own neighbor table. At this point, the WSN terminal successfully joined WSN.

Step 304: The WSN terminal fails to pass the authentication, and the primary gateway rejects the WSN terminal to join the WSN. Step 305: The primary gateway specifies the gateway used by the WSN terminal to access the telecommunication network. Here, the primary gateway determines the WSN according to the relevant principle of the gateway allocation. The terminal accesses the gateway used by the telecommunication network. The main gateway may send the information and communication connection configuration information of the WSN terminal to the allocated gateway, and the main gateway sends the information of the allocated gateway and the communication connection configuration information to the WSN terminal. .

The communication connection configuration information is a link key required for establishing a communication connection between the designated gateway and the WSN terminal, and the designated gateway establishes a secure communication connection with the WSN terminal through the link key.

Step 306: The master gateway of the WSN notifies the management platform that the WSN terminal has joined the WSN, and sends the correspondence between the WSN terminal and its assigned gateway to the management platform.

In this step, the management platform saves related information of the WSN terminal, including the identifier of the WSN terminal, the correspondence between the WSN terminal and the WSN to which the WSN terminal belongs, and the correspondence between the WSN terminal and the gateway to which it is assigned. The management platform also associates the WSN terminal. The information is sent to the service platform, and the service platform configures related data of the WSN terminal, and enables the services supported by the WSN terminal.

It can be seen that, through the above process, the WSN terminal writes the network configuration parameter and joins the designated WSN, and the WSN's main gateway specifies the gateway used by the WSN terminal to access the telecommunication network, so that the WSN terminal can report to the service platform through the gateway. data.

It should be noted that, in order to record information such as a gateway used by the WSN terminal in the WSN to access the telecommunication network, the main gateway stores the corresponding relationship between the WSN terminal in the WSN and the assigned gateway.

After the WSN terminal joins the WSN, there may be a situation in which the gateway used by the WSN terminal to access the telecommunication network needs to be changed. For example, the primary gateway may select another slave gateway closer to the WSN terminal for one WSN terminal, thereby reducing the WSN. Routing between the terminal and the slave gateway The path is achieved to reduce the communication complexity and energy saving effect in the WSN. At this time, the main gateway may specify a new gateway for the WSN terminal to provide the telecommunication network access, and the main gateway may send the information and communication connection configuration information of the WSN terminal to the newly designated gateway, and notify the gateway change message that the The WSN terminal provides a gateway for telecommunications network access. The newly designated gateway adds the configuration information of the WSN terminal to the gateway, and the original gateway deletes the telecommunication network access configuration information of the WSN terminal stored in the gateway. The newly designated gateway provides telecommunication network access for the WSN terminal, and the original gateway no longer provides telecommunication network access for the WSN terminal.

When the terminal that joins the WSN leaves the WSN, the gateway used by the primary gateway and the WSN terminal to access the telecommunication network can clear the telecommunication network access configuration information of the WSN terminal that is saved, the gateway corresponding to the main gateway and the WSN terminal, The WSN terminal is no longer provided with telecommunication network access after leaving the WSN.

In the present invention, the primary gateway and the secondary gateway in the wireless sensor network can establish communication through the telecommunication network and the management platform; when the primary gateway and the secondary gateway perform data backup on the management platform, the backup data can be sent to the management platform through the communication connection. The management platform receives and saves backup data. After the primary gateway and the secondary gateway perform data backup on the management platform, if the data that needs to be backed up by the primary gateway and the secondary gateway is updated, the primary gateway and the secondary gateway can send the updated data to the management platform.

Embodiment 3

4 is a flowchart of a slave gateway replacing a master gateway in a WSN according to Embodiment 3 of the present invention. As shown in FIG. 4, the process of replacing a master gateway after the master gateway in the wireless sensor network fails to work normally includes the following steps. :

Step 401: Determine that the primary gateway in the wireless sensor network is not working properly.

The main gateway cannot work normally because it is caused by a fault. Moreover, whether the main gateway works normally is determined by the management platform. Specifically, the management platform can determine whether the main gateway works normally by the following means: 1. When the primary gateway fails but can still communicate with the management platform of the telecommunication network, the primary gateway notifies the management platform of the fault information;

Step 402: The management platform determines that one slave gateway in the wireless sensor network replaces the primary gateway.

The management platform maintains information about the slave gateways in the wireless sensor network, and the management platform can select a slave gateway that replaces the master gateway according to factors such as functions, performance, and current load supported by the gateway device. After the management platform determines to replace the slave gateway of the master gateway, establish communication with the slave gateway through the telecommunication network, and notify the slave gateway to replace the master gateway in the wireless sensor network, and the slave gateway works as a new master gateway in the wireless sensor network. .

Step 403: The management platform provides the backup data of the original primary gateway to the determined secondary gateway (ie, the new primary gateway).

The slave gateway works as a new master gateway in the wireless sensor network, needs to obtain configuration information of the wireless sensor network, and uses the configuration information to manage the wireless sensor network, and the information is backed up by the original master gateway on the management platform. The backup data can be provided to the slave gateway by the management platform.

The management platform and the slave gateway establish a communication connection through the telecommunication network, and the management platform can send the backup data of the original master gateway to the slave gateway through the communication connection, and receive and save the backup data from the gateway.

Step 404: The new primary gateway notifies the WSN terminal and other gateways in the wireless sensor network of the primary gateway change information. The new primary gateway can notify the WSN terminal and other gateways in the wireless sensor network through broadcast messages in the wireless sensor network. After receiving the primary gateway change notification message, the WSN terminal and other gateways can create a communication path with the new primary gateway. Thereby, it is possible to communicate normally with the new primary gateway.

Step 405: The new primary gateway determines whether there is a WSN terminal accessing the telecommunication network through the original primary gateway. If yes, the process in step 406 is performed; if not, the process of replacing the primary gateway ends.

The new primary gateway can obtain the correspondence between the WSN terminal in the wireless sensor network and its assigned gateway according to the obtained backup data of the original primary gateway, and identify whether there is a WSN terminal accessing the telecommunication network through the original primary gateway.

Step 406: The new primary gateway specifies a new gateway for the WSN terminal accessing the telecommunication network through the original primary gateway.

The new primary gateway assigns a new access to the telecommunications network to the WSN terminal. The method described in the second step 305 of the second embodiment of the present invention is not described herein.

Through the above processing flow, when the primary gateway in the wireless sensor network fails to work normally, one of the slave gateways replaces the primary gateway, so that the wireless sensor network can continue to work normally.

In the present invention, when the primary gateway is not working properly, it is determined that the new primary gateway can also use the manner negotiated from the gateway. The primary gateway in the wireless sensor network needs to preset the backup gateway priority of the secondary gateway in the wireless sensor network; when the backup gateway priority of the gateway indicates that the primary gateway fails, the gateway is selected as the new primary gateway to work; When the primary gateway fails, the slave gateway with the highest priority of the backup gateway is selected as the new primary gateway. The priority of the backup gateway of the slave gateway may be set as follows: When the gateway joins the wireless sensor network as the routing node, the primary gateway sets the priority of the backup gateway of the slave gateway, and sends the setting information of the backup gateway priority of the slave gateway. For other slave gateways and management platforms, the backup gateways of other gateways are preferred. The setup information of the predecessor is sent to the slave gateway. In this way, the primary gateway, the secondary gateway, and the management platform grasp the priority of the backup gateway of each slave gateway in the wireless sensor network.

Embodiment 4

FIG. 5 is a flowchart of a slave gateway replacing a master gateway in a WSN according to Embodiment 4 of the present invention. As shown in FIG. 5, a process of replacing a master gateway after the master gateway in the wireless sensor network in this embodiment cannot work normally is specific. Includes the following steps:

Step 501: Determine, from the gateway or the management platform, that the primary gateway in the wireless sensor network is unable to work normally;

If the primary gateway fails to work normally, it is usually caused by a fault or abnormality. You can determine whether the primary gateway works normally by the following methods:

1. When the primary gateway fails but can still communicate with the management platform of the telecommunication network, the primary gateway notifies the management platform or the secondary gateway of the fault information;

2. The management platform or the gateway detects the gateway of the wireless sensor network periodically, and detects that the primary gateway is faulty;

4. The WSN terminal detects that the primary gateway is faulty, and notifies the fault information (such as notification from the gateway through its own access) to the management platform or the slave gateway.

Step 502: The gateway or the management platform notifies the failure information of the primary gateway that the backup gateway has the highest priority as the secondary gateway;

After the gateway or the management platform determines that the primary gateway is faulty, it determines the secondary gateway with the highest priority of the backup gateway according to the setting information of the backup gateway priority of the gateway, and then notifies the secondary gateway of the failure of the primary gateway. Gateway.

Step 503: The slave gateway has the highest priority, and the slave gateway notifies the other slave gateways and the management platform that the master gateway can be replaced by the current master gateway.

Step 504: The management platform provides backup data of the original primary gateway to the new primary gateway. Step 505: The new primary gateway notifies the WSN terminal and other gateways in the wireless sensor network of the primary gateway change information;

Step 506: The new primary gateway determines whether there is a WSN terminal that accesses the telecommunication network through the original primary gateway. If yes, the process in step 507 is performed; if not, the process of replacing the primary gateway ends.

Step 507: The new primary gateway specifies a new gateway for the WSN terminal accessing the telecommunication network through the original primary gateway.

Through the above process in the fourth embodiment, it is realized that one of the slave gateways replaces the master gateway when the master gateway in the wireless sensor network fails to work normally, so that the wireless sensor network can continue to work normally.

The following is the following related content related to the establishment of WSN and management of WSN through 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. There are three types of nodes in the ZigBee network: ZigBee coordination point, ZigBee routing node and ZigBee terminal node.

Among them, the ZigBee coordination point is also called the Personal Area Network (PAN) coordination point (ZC, ZigBee Coordinator) in IEEE 802.15.4, and can be used as a convergence node in the WSN. The ZigBee coordination point must be a Full-Function Device (FFD). 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 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 network by connecting other nodes. Coverage, etc. In addition, the ZigBee routing node can also act as a common coordination point in its Personal Operating Space (POS), and IEEE 802.15.4 is called a 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), which connects to the network through ZigBee co-nodes or ZigBee routing nodes, but does not allow any other node to join through it. Network, ZigBee endpoints can operate at very low power.

In the present invention, the primary gateway (or the gateway responsible for the WSN) acts as a Zigbee coordination point in the Zigbee network and is responsible for the formation of the WSN. The WSN terminal can join the WSN as a Zigbee routing node or a Zigbee terminal node; the slave gateway (or other gateways other than the primary gateway) joins the WSN as a Zigbee routing node. The gateway and WSN terminal need to support Zigbee communication technology.

In addition, in order to realize the security of the Zigbee network, it is necessary to encrypt the communication in the WSN, the encryption operation in the Zigbee network, and the advanced encryption standard algorithm (AES, Advanced Encryption Standard), and the symmetric key length used is 128 bits. The keys used in the Zigbee network mainly include: Master Key, Link Key, and Network Key. The master key is a shared key used in the process of performing a symmetric key establishment protocol, and is a long-term security basis between two devices, and can be used to generate a link key; the link key is in a PAN network, A key shared between two devices for secure communication between two devices; a network key is a shared key in a PAN network for the security of broadcast communication.

In order to realize the security and key management of the Zigbee network, there is a trust center in the Zigbee network. A trust center is a type of trusted device that distributes security keys across the network. It allows devices to join the network and assign keys, thus ensuring end-to-end security between devices. In a network that uses security mechanisms, the network coordinator can become a trust center. The Trust Center provides the following three functions: (1) Trust Management: The task is responsible for verifying the device joining the network. (2) Network Management: The task is to obtain and assign network keys to the device.

(3) Configuration management: The task is to bind the application to the device it manages, and achieve end-to-end secure transmission between the two devices.

In order to implement trust management, the device needs to receive the initial master key from the trust center. For network management purposes, the device should receive the initial network key and can only obtain updates to the network key from the Trust Center. In order to implement network configuration, the device needs to receive a master key or a link key from the trust center to establish an end-to-end secure link between the two devices.

In addition to the initial master key, 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.

In the present invention, the primary gateway acts as a trust center for network security management. The identity authentication and secure communication of the gateway can be implemented between the management platform and other network elements in the gateway and the telecommunication network through the identity of the gateway.

In the present invention, a WSN is identified by the network identifier of the WSN. After the primary gateway creates the WSN, the network identifier of the WSN may be determined by the primary gateway or by the management platform. The information about the network identifier and the network location of the WSN is recorded in the management platform. Thus, the management platform can determine whether there is a WSN managed by the management platform according to a given location. If there is a WSN, the WSN of the location can be obtained, thereby determining the WSN at the location.

The system for accessing the telecommunication network of the wireless sensor network of the present invention can be specifically understood in conjunction with the system shown in FIG. 1 above. It should be noted that the system for accessing the telecommunication network of the wireless sensor network of the present invention is realized by updating the function of the corresponding network element on the basis of the existing combined network, and the connection structure of the network element in the network is not change. 6 is a schematic structural diagram of a system for accessing a telecommunication network of a wireless sensor network according to the present invention. As shown in FIG. 6, the system for accessing a telecommunication network of the wireless sensor network of the present invention includes a determining unit 60 and a replacing unit 61, wherein

The determining unit 60 is configured to: when it is determined that the primary gateway is not working properly, trigger the replacement unit; The replacing unit 61 is configured to operate one of the WSNs from the gateway as a primary gateway instead of the original primary gateway.

The determining unit 60 is disposed in the management platform, and after determining that the primary gateway in the WSN is not working properly, further determining a secondary gateway of the replacement primary gateway in the WSN, and notifying the determined secondary gateway by the proxy unit 61. As the primary gateway, it works instead of the original primary gateway.

The replacement unit 61 is disposed in the slave gateway. After the determining unit 60 determines that the master gateway in the WSN is not working properly, the replacing unit 61 further determines, by the slave gateway in the WSN, a new master gateway to work instead of the original master gateway.

The system for accessing a telecommunications network of the wireless sensor network of the present invention further includes a setting unit (not shown) and a transmitting unit (not shown), wherein

The above replacement unit 61 is provided in the slave gateway or the management platform;

When the determining unit 60 determines that the primary gateway is not working properly, the replacing unit 61 is further configured to notify the backup gateway with the highest priority of the backup gateway, and replace the original gateway with the highest priority backup gateway. jobs.

The management platform stores backup information of the primary gateway;

When the replacing unit 61 replaces the original primary gateway from the gateway, the management platform sends the stored backup information of the primary gateway to the secondary gateway replacing the original primary gateway, and the secondary gateway replacing the original primary gateway uses the backup information of the original primary gateway at the WSN. working.

The system for accessing a telecommunication network of the wireless sensor network of the present invention further includes a broadcasting unit (not shown) for transmitting a broadcast message in the WSN after the replacement unit replaces the original primary gateway from the gateway, and the new primary gateway is The information informs the WSN terminal and the rest of the WSN from the gateway. The system for accessing the telecommunication network of the wireless sensor network of the present invention, the function of the updated network element and the information interaction manner can be understood by referring to the related descriptions of the first embodiment to the fourth embodiment.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

A method for a wireless sensor network to access a telecommunication network, wherein the WSN is provided with a WSN terminal and two or more WSN gateways, and the two or more WSN gateways are provided with a main gateway; There is a management platform; and the method further includes:

When the primary gateway fails to work normally, one of the WSNs is used as a primary gateway instead of the original primary gateway.

2. The method according to claim 1, wherein the one of the WSNs is used as a primary gateway instead of the original primary gateway, and is:

3. The method according to claim 2, wherein the management platform specifies a slave gateway that replaces the original primary gateway, and is:

The method according to claim 1, wherein the one of the WSNs acts as a master gateway instead of the original master gateway, and is:

The slave gateway in the WSN negotiates to determine a new master gateway to work in place of the original master gateway.

The method according to claim 4, wherein the one of the WSNs acts as a master gateway instead of the original master gateway, and is:

The method according to any one of claims 1 to 5, wherein the method further comprises:

The management platform stores backup information of the primary gateway;

After the gateway replaces the original primary gateway, a broadcast message is sent in the WSN, and the information of the new primary gateway is notified to the WSN terminal and the remaining secondary gateways of the WSN.

The method according to claim 6, wherein the management platform stores backup information of the slave gateway;

The backup information of the primary gateway includes configuration information of the WSN, correspondence information between the WSN terminal and the gateway allocated for the WSN terminal, and the configuration information of the WSN includes the identifier of the WSN, the network topology information, the slave gateway information, and the WSN. Information of the terminal and network security setting information; the backup information of the slave gateway includes information from the gateway information, the WSN terminal of the telecommunication network accessed through the gateway; wherein the slave gateway information includes the slave gateway identification information and the address information The information of the WSN terminal includes WSN terminal identification information and address information.

The method according to claim 8, wherein the method further comprises: determining, by the new primary gateway, that the existing primary gateway is accessed according to the correspondence information between the obtained WSN terminal and the gateway allocated for the WSN terminal When the WSN terminal of the telecommunication network re-allocates the gateway accessing the telecommunication network for the WSN terminal accessing the telecommunication network through the original primary gateway.

A system for accessing a telecommunication network by a wireless sensor network, wherein the WSN is provided with a WSN terminal and two or more WSN gateways, and the two or more WSN gateways are provided with a main gateway; a management platform; wherein the system includes a determining unit and Substitute unit, where

The system according to claim 10, wherein the determining unit is disposed in the management platform, and after determining that the primary gateway in the WSN is not working properly, further determining the replacement primary gateway in the WSN From the gateway, and the proxy unit notifies the determined slave gateway as the master gateway to work instead of the original master gateway.

The system according to claim 10, wherein the replacement unit is provided in the slave gateway; after the determining unit determines that the master gateway in the WSN is not working properly, the substitute unit further passes the slave in the WSN. The gateway negotiates to determine a new primary gateway to work in place of the original primary gateway.

The system according to claim 10, wherein the system further comprises a setting unit and a sending unit, wherein

The replacement unit is disposed in a slave gateway or a management platform;

The system according to any one of claims 10 to 13, wherein the management platform stores backup information of the primary gateway;

When the replacement unit replaces the original primary gateway from the gateway, the management platform will store the stored primary The backup information of the gateway is sent to the slave gateway instead of the original master gateway, and the slave gateway replacing the original master gateway uses the backup information of the original master gateway to work in the WSN.

The system according to any one of claims 10 to 13, wherein the system further comprises a broadcasting unit, configured to send a broadcast in the WSN after the replacement unit replaces the original primary gateway from the gateway. The message informs the WSN terminal and the remaining slave gateways of the WSN of the information of the new primary gateway.