CN102469553A - Method and system for accessing wireless sensor network - Google Patents
Method and system for accessing wireless sensor network Download PDFInfo
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- CN102469553A CN102469553A CN2010105513547A CN201010551354A CN102469553A CN 102469553 A CN102469553 A CN 102469553A CN 2010105513547 A CN2010105513547 A CN 2010105513547A CN 201010551354 A CN201010551354 A CN 201010551354A CN 102469553 A CN102469553 A CN 102469553A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W88/18—Service support devices; Network management devices
Abstract
The invention discloses a method and a system for accessing a wireless sensor network (WSN). The system comprises a WSN and a telecommunication network, wherein multiple gateways are configured in the WSN, and the telecommunication network comprises a management platform of the WSN and a network unit. The management platform is used for storing the WSN terminals in the WSN and the corresponding relationship of the distributed gateways thereof. The WSN terminals in the WSN are accessed to the telecommunication network through the distributed gateways. The network unit is used for obtaining the information of the distributed gateways of the WSN terminals from the management platform and building the communication between the network unit and the WSN terminals through the obtained gateway information. The communication between the network unit in the telecommunication network and the WSN terminals in the wireless sensor network can be realized through the invention under the condition that multiple gateways are configured in the WSN.
Description
Technical field
The present invention relates to the communication technical field that wireless sensor network (WSN, Wireless Sensor Network) combines with communication network, relate in particular to a kind of cut-in method and system of wireless sensor network.
Background technology
WSN is that a kind of brand-new information is obtained and treatment technology as the product that calculating, communication and transducer three technology combine.Because the improvement of technology, mechanics of communication and the battery technology of recent miniature manufacturing impels small WSN terminal can have the ability of induction, wireless telecommunications and process information.The object and the change of environment can responded to and detect in this type of WSN terminal not only, and can handle the data of collecting, and will handle data later and deliver to DCC with Wireless transmission mode.These WSN terminals are made up of these several parts of power supply, awareness tool, flush bonding processor, memory, communication component and software usually.Wherein, power supply is that sensor node provides operate as normal the necessary energy; Awareness tool is used for perception, obtains extraneous information, and is converted into digital signal; Flush bonding processor is responsible for the work of coordinator node each several part, carries out necessary processing, preservation like the information that awareness tool is obtained, the mode of operation of control awareness tool and power supply etc.; Communication component is responsible for and the communicating by letter of other transducers or observer; Software then provides necessary software support for sensor node, like embedded OS, embedded type database system etc.By means of various informative sensing element built-in in the WSN terminal; Measure heat in the surrounding enviroment of place, infrared, sonar, radar and seismic signal, thereby survey the numerous material phenomenons such as size, speed and direction that comprise temperature, humidity, noise, luminous intensity, pressure, soil constituent, mobile object.The WSN terminal generally constitutes network through self-organizing or pre-configured mode.On communication mode,, it is generally acknowledged that the most suitable sensor network of short-range wireless, low-power communication technology uses so-called WSN though can adopt various ways such as wired, wireless, infrared and light.Using more at present, the wireless, low-power communication technology comprises: Institute of Electrical and Electric Engineers (IEEE, Institute of Electrical and Electronics Engineers) 802.15.4 and Zigbee technology or the like.Wherein, Zigbee and bluetooth are similar, are a kind of emerging short distance wireless technicals.
IEEE 802.15.4 is accurate by a low-speed wireless territory network mark of IEEE exploitation.IEEE 802.15.4 has stipulated physical layer and MAC layer standard, and the communication module that meets IEEE 802.15.4 standard possesses low cost, low power consumption, undersized characteristics.
Zigbee alliance is one and is devoted on the basis of open global standards, exploitation reliably, the monitoring that connects of low cost, low power consumption, wireless network and the tissue of controlling product.The physical layer of Zigbee standard and media access control layer adopt IEEE 802.15.4 technology, and network layer, safety management, application layer standard and interoperability are developed by Zigbee alliance.Zigbee intelligent energy common application standard in the Zigbee standard (Zigbee smart energy public applications profile) and Zigbee home automation using standard (Zigbee home automation public applications profile) are used and domestic. applications to business environment respectively.
The microprocessing capability at WSN terminal and wireless communication ability have broad application prospects WSN, and its application comprises military applications, biology and environmental monitoring, healthy application, domestic. applications, Industry Control and monitoring etc.
WSN and communication network combine; Like 2G mobile communication, 3G mobile communication, the DSL communication technology (xDSL), optical fiber communication (FTTx), broadband wireless access, satellite/microwave etc.; Can make the extension of WSN as existing network; Expanded the ability of communication network, made communication object expand to physical world, had bright development prospect from the people.WSN is with after existing communication network combines; Can make the data of sensing net perception effectively be delivered to data center; Through arrangement and analysis to data; Greatly the change mankind of degree obtain the mode of the data in the nature world, and the management that also can concentrate WSN simultaneously solves the unmanageable problem of WSN everywhere that is dispersed at present.
WSN combines with communication network, is meant WSN is connected with communication network, utilizes communication network that professional carrying is monitored, manages and accomplished to WSN and the business that provides thereof and implements with cooperation, and expand the business that WSN provided through communication network.The combination of WSN and telecommunications network generally is that WSN is connected to the telecommunications network platform through gateway device.
The WSN terminal is connected with gateway through a jumping or multi-hop for constituting the sensor node of WSN.WSN is responsible at the terminal gathering and uploading data, and receives and fill order.The several at least hundreds ofs at most in WSN terminal of forming WSN can be as required with star, tree-like or netted mode networkings such as (mesh) between the WSN terminal, wherein some WSN terminal or have stronger networking and the data forwarding ability.In WSN, gateway is responsible for the data with the WSN terminal to report, is sent to the network of relation unit in the communication network, and the network of relation unit in the communication network sends to the WSN terminal through gateway with dependent instruction.And when WSN adopts IEEE 802.15.4 commonly used and Zigbee technology; Generally be responsible for creating WSN by gateway; The configuration information at WSN terminal and the significant datas such as service configuration information of sensing net are preserved in management when being responsible for the adding of WSN terminal and leaving the sensing net in the gateway.
The data of WSN terminal to report; Need send to the network of relation unit in the communication network through gateway; And only dispose a gateway usually among the existing WSN; Be used for the data forwarding of WSN terminal to report is given the network of relation unit of communication network, thereby, can cause very big load the gateway among the WSN when the WSN terminal quantity among the WSN often or during the frequent reported data in WSN terminal; Cause the data at WSN terminal in time not send, and congested problem take place in communicating by letter between WSN terminal and the gateway.Like this, can seriously influence the operate as normal of WSN.In addition, when the NE of communication network side is carried out the management at the WSN terminal in the wireless sensor network, need through the gateway foundation of wireless sensor network and communicating by letter of WSN terminal; If the gateway unit of communication network side is only set up with the WSN terminal in the wireless sensor network through a gateway and is communicated by letter; Cause bigger bearing pressure can for equally this gateway; Cause the gateway unit of communication network side can not be timely with wireless sensor network in the WSN terminal set up and communicate by letter, influence the normal operation of related service.Therefore, network of relation unit that need to consider the communication network side how with wireless sensor network in the WSN terminal problem such as communicate.At present, under the scene that WSN and communication network combine, there is not effective solution as yet to this problem.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of cut-in method and system of wireless sensor network, with NE in the communication network under the situation that is implemented in WSN configuration multiple gateway and the WSN communication between terminals in the wireless sensor network.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides the connecting system of a kind of wireless sensor network (WSN), this system comprises: WSN and communication network, wherein, dispose a plurality of gateways among the said WSN, and comprise management platform and the NE of WSN in the said communication network,
Said management platform is used for preserving the corresponding relation of the gateway that the WSN terminal of WSN is assigned with it;
WSN terminal among the said WSN is used for inserting said communication network through the gateway that distributes;
Said NE is used for obtaining from management platform the information of the gateway that said WSN terminal is assigned with, and sets up and said WSN communication between terminals through the gateway information that obtains.
A plurality of gateways among the said WSN adopt principal and subordinate's mode of operation,
Primary gateway is used for carrying out the scheduling and the distribution of gateway at said a plurality of gateways, used gateway when inserting communication network for said WSN terminal distribution; The gateway that is distributed be primary gateway self or any one from gateway;
Said from gateway, be used for providing communication network to insert according to the said WSN of being scheduling to of said primary gateway terminal.
Said primary gateway is further used for; When said WSN terminal to apply adds WSN; Employed gateway when inserting said communication network for said WSN terminal distribution; Said WSN terminal information, communication are connected configuration information send to the gateway that is distributed, and information, the communication connection configuration information of gateway distribution sent to said WSN terminal; The corresponding relation of the gateway that also is used for said WSN terminal is assigned with it sends to said management platform and preserves.
Said management platform is further used for, and when receiving said register requirement from gateway, writes down said relevant information from gateway, and notifies said primary gateway to have new to add WSN from gateway; Wherein, said relevant information from gateway comprises at least: said from the sign of gateway with from the address of gateway communication network;
Accordingly, said primary gateway is further used for, and will join the needed network configuration parameters of said WSN and send to said from gateway;
Saidly be further used for, use the network configuration parameters that obtains to join said WSN from gateway.
A plurality of gateways among the said WSN adopt reciprocity mode of operation,
Said management platform is further used for, used gateway when inserting communication network for the WSN terminal distribution among the said WSN.
Said NE is further used for, and sends the request of obtaining the gateway that the WSN terminal is assigned with to said management platform, wherein comprises the sign at said WSN terminal at least;
Accordingly, said management platform is further used for, and confirms the information of the gateway that said WSN terminal is assigned with and offers said NE;
Said NE is further used for, and establishes a communications link according to information and the said gateway of the gateway that obtains, and the sign at said WSN terminal is offered the gateway that is assigned with, through communicating by letter of the gateway foundation that is assigned with and said WSN terminal.
The present invention also provides a kind of cut-in method of wireless sensor network, is applied to the network architecture that WSN and communication network combine, and this method comprises:
The a plurality of gateways of configuration in said WSN, the corresponding relation of the gateway that the WSN terminal among the management platform preservation WSN in the said communication network is assigned with it;
Said communication network is inserted through the gateway that distributes in WSN terminal among the said WSN, and said NE obtains the information of the gateway that said WSN terminal is assigned with from management platform, and sets up and said WSN communication between terminals through the gateway information that obtains.
A plurality of gateways among the said WSN adopt principal and subordinate's mode of operation, and this method further comprises:
Primary gateway is carried out the scheduling and the distribution of gateway in said a plurality of gateways, used gateway when inserting communication network for said WSN terminal distribution; The gateway that is distributed be primary gateway self or any one from gateway;
Provide communication network to insert from gateway according to the said WSN of being scheduling to of said primary gateway terminal.
This method further comprises: when said primary gateway adds WSN at said WSN terminal to apply; Employed gateway when inserting said communication network for said WSN terminal distribution; Said WSN terminal information, communication are connected configuration information send to the gateway that is distributed, and information, the communication connection configuration information of gateway distribution sent to said WSN terminal; The corresponding relation of the gateway that also said WSN terminal is assigned with it sends to said management platform and preserves.
This method further comprises:
Said management platform writes down said relevant information from gateway when receiving said register requirement from gateway, and notifies said primary gateway to have new to add WSN from gateway; Wherein, said relevant information from gateway comprises at least: said from the sign of gateway with from the address of gateway communication network;
Said primary gateway will join the needed network configuration parameters of said WSN and send to said from gateway;
The said network configuration parameters that obtains from the gateway use joins said WSN.
A plurality of gateways among the said WSN adopt reciprocity mode of operation, and this method further comprises:
Said management platform is the used gateway when inserting communication network of the WSN terminal distribution among the said WSN.
Said NE obtains the information of the gateway that the WSN terminal is assigned with from management platform, and sets up and the WSN communication between terminals through the gateway information that obtains, and is specially:
Said NE sends the request of obtaining the gateway that the WSN terminal is assigned with to said management platform, wherein comprises the sign at said WSN terminal at least;
Said management platform is confirmed the information of the gateway that said WSN terminal is assigned with and is offered said NE;
Said NE establishes a communications link according to information and the said gateway of the gateway that obtains, and the sign at said WSN terminal is offered the gateway that is assigned with, through communicating by letter of the gateway foundation that is assigned with and said WSN terminal.
The cut-in method of a kind of wireless sensor network provided by the present invention and system; When WSN and communication network combination; The a plurality of gateways of configuration in a WSN, the WSN terminal that is respectively among the WSN by a plurality of gateways provides the access of communication network, thereby has improved the communication network access capability of WSN; Can effectively solve in the prior art when inserting communication network through a gateway problem that the data that caused can not in time be sent and WSN is congested because of the WSN terminal.In addition; The corresponding relation of the gateway that management platform preservation WSN terminal is assigned with it; NE in the communication network can be set up and the communicating by letter of WSN terminal through the gateway that is assigned with; Like this NE in communication network set up with wireless sensor network in the communicating by letter of WSN terminal the time also can the NE in the communication network can be communicated by letter timely with the foundation of WSN terminal through a plurality of gateways in the wireless sensor network.
Description of drawings
The network architecture sketch map of Fig. 1 when having a plurality of gateway among the WSN of the embodiment of the invention;
Fig. 2 is the flow chart of WSN configuration multiple gateway in the embodiment of the invention;
Fig. 3 is that the WSN terminal adds WSN in the embodiment of the invention, and when adopting the mode of operation of master and slave gateway, is the flow chart of this WSN terminal distribution gateway;
Fig. 4 is that the WSN terminal adds WSN in the embodiment of the invention, and when adopting reciprocity mode of operation between the multiple gateway of WSN, is the flow chart of this WSN terminal distribution gateway;
Fig. 5 is that business platform is set up the flow chart of communicating by letter with the WSN terminal among the WSN in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment technical scheme of the present invention is set forth in detail.
Basic thought of the present invention is: a plurality of gateways of configuration in a WSN; Communication network is inserted through the gateway that is assigned with in WSN terminal among the WSN; The corresponding relation of WSN terminal among the management platform preservation WSN in the communication network and the gateway that is assigned with thereof; NE in the communication network can obtain the information of the gateway that the WSN node is assigned with from management platform, and then sets up and the communicating by letter of WSN terminal through this gateway.
In a plurality of gateways of WSN, can adopt principal and subordinate's mode of operation or reciprocity mode of operation.
Under principal and subordinate's mode of operation, in a plurality of gateways of WSN configuration, one of them gateway is a primary gateway, and remaining gateway is from gateway.Employed gateway when primary gateway is used to specify the WSN terminal to insert communication network, the WSN terminal is linked into communication network through the specified gateway of primary gateway.The gateway that it is pointed out that this appointment can be primary gateway self, also can for one of them from gateway.From gateway is that the specified WSN terminal of primary gateway provides communication network to insert.
Primary gateway is responsible for the establishment of WSN, joins WSN from gateway as the routing node the WSN.When gateway joins WSN; Need register in management platform; This relevant information from gateway of management platform record comprises sign from gateway, at least from the information such as address of gateway communication network, and is had by the primary gateway among the management platform notice WSN and new to join this WSN from gateway.After joining this WSN from gateway, this information from gateway of primary gateway record can comprise from the information of gateway: communication network access capability that can provide from the address of gateway among WSN, from the address of gateway communication network, from gateway or the like.If adopt same address from the address and the address in communication network of gateway among this WSN, primary gateway only need write down this address so.Primary gateway and can pass through WSN from the communication between the gateway also can be passed through communication network.
When the WSN terminal added WSN, the dependency rule that primary gateway is distributed according to gateway be the employed gateway of this WSN terminal distribution access telecommunications network, and the gateway of this distribution can be primary gateway, also can be for from gateway.Primary gateway can confirm that to the aspects such as length of the route of gateway the WSN node inserts the employed gateway of telecommunications network according to the topology of network, the load balancing between gateway, WSN node.Carry out the branch timing of gateway, primary gateway offers this WSN terminal with the information (like the address of gateway in WSN) of the gateway that distributes, and the information of the gateway that is distributed is preserved at the WSN terminal, and is created to the routing iinformation of this gateway; Primary gateway offers the gateway that is distributed with this WSN terminal information (sign, the address of WSN terminal in WSN that comprise the WSN terminal), this WSN terminal information of the gateway that is distributed record.
Primary gateway is preserved the corresponding relation of the gateway that the WSN terminal among the WSN is assigned with it, and the information of this corresponding relation is sent to management platform, the information of this corresponding relation of management platform preservation.This corresponding relation can adopt the form of correspondence table to realize, in this corresponding relation the sign at record WSN terminal with and the sign of the gateway that is assigned with.Can inquire certain WSN terminal through this corresponding relation and insert the employed gateway of communication network, and certain gateway among the WSN is that which WSN terminal among the WSN provides communication network to insert.
In addition, after the WSN terminal added WSN, primary gateway can change the WSN terminal and insert the employed gateway of communication network.Gateway by the new appointment of primary gateway inserts for this WSN terminal provides communication network, and original gateway no longer inserts for this WSN terminal provides communication network.
When WSN leaves WSN in the terminal; Primary gateway inserts the employed gateway of communication network with this WSN terminal can remove this WSN terminal information of preserving separately; The gateway of primary gateway and this WSN terminal correspondence no longer inserts for this WSN terminal provides communication network after WSN is left at the WSN terminal.
Under reciprocity mode of operation, be the employed gateway of WSN terminal distribution access telecommunications network among the WSN by management platform.In a plurality of gateways of WSN configuration, can create WSN by a gateway, remaining gateway joins WSN as the routing node among the WSN.Management platform is preserved the information of the gateway among the WSN, the address of address and the gateway of the sign, gateway that comprises gateway in communication network in WSN, the communication network access capability of gateway etc.
Before the WSN terminal adds WSN; Can in the WSN terminal, write the needed network configuration parameters of adding WSN through client or other modes by management platform, this network configuration parameters can be obtained by the gateway of the responsible establishment WSN of management platform from the WSN of WSN terminal to apply adding.When the WSN terminal adds WSN, to the request of the gateway proposition adding WSN that creates WSN, comprise the information such as sign at WSN terminal in this request, the gateway of creating WSN can send to management platform with the WSN terminal information.After management platform was received the WSN terminal information of the gateway transmission of creating WSN, the dependency rule that distributes according to gateway was gateway of this WSN terminal distribution.Management platform can send to the information of the gateway that distributes the gateway of creating WSN, by the gateway of creating WSN the gateway information (like the address of gateway in WSN) that distributes is sent to this WSN terminal; The information of the gateway that is distributed is preserved at the WSN terminal, and is created to the routing iinformation of this gateway.Management platform receives and sends the gateway to this distribution with the communication link of this WSN terminal information (sign, the address of WSN terminal in WSN that comprise the WSN terminal) through communication network, this WSN terminal information of gateway record of said distribution; In addition, management platform also can indicate the gateway of creating WSN that this WSN terminal information (sign, the address of WSN terminal in WSN that comprise the WSN terminal) is received and sent the gateway to this distribution through the communication link among the WSN.
Under reciprocity mode of operation; The corresponding relation of the gateway that the WSN terminal among the management platform preservation WSN is assigned with it; This corresponding relation can adopt the form of correspondence table to realize, in this corresponding relation the sign at record WSN terminal with and the sign of the gateway that is assigned with.Management platform can inquire certain WSN terminal through this corresponding relation and insert the employed gateway of communication network, and certain gateway among the WSN is that which WSN terminal among the WSN provides communication network to insert.
Through above-mentioned dual mode is after WSN terminal distribution among the WSN inserts the employed gateway of telecommunications network, and management platform is preserved the corresponding relation of the gateway that the WSN terminal among the WSN is assigned with it.If the NE in the communication network (like business platform) prepare to set up with WSN in the communicating by letter of WSN terminal; NE in the communication network can obtain the information (like address, the sign of gateway) that the employed gateway of telecommunications network is inserted at this WSN terminal from management platform, sets up and the communicating by letter of this WSN terminal through this gateway then.
Based on above-mentioned thought; The network architecture that the present invention also provides a kind of WSN and communication network to combine; Wherein, WSN is made up of WSN terminal and gateway (a plurality of), and the WSN terminal is connected to communication network through the gateway that is assigned with separately, with management platform in the communication network with other NEs foundation such as (like business platforms) communicate by letter.Management platform is used for preserving the corresponding relation of the gateway that the WSN terminal of WSN is assigned with it.WSN terminal among the WSN is used for inserting communication network through the gateway that distributes.NE is used for obtaining from management platform the information of the gateway that the WSN terminal is assigned with, and sets up and the WSN communication between terminals through the gateway information that obtains; Specifically comprise: NE sends the request obtain the gateway that the WSN terminal is assigned with to management platform, wherein comprises the sign at WSN terminal at least; Management platform is confirmed the information of the gateway that the WSN terminal is assigned with and is offered NE; NE establishes a communications link according to information and the gateway of the gateway that obtains, and the sign at WSN terminal is offered the gateway that is assigned with, through communicating by letter of the gateway foundation that is assigned with and WSN terminal.
Further, a plurality of gateways among the WSN can adopt principal and subordinate's mode of operation, and primary gateway is carried out the scheduling and the distribution of gateway in a plurality of gateways, used gateway when inserting communication network for the WSN terminal distribution; The gateway that is distributed be primary gateway self or any one from gateway; Provide communication network to insert from gateway according to the WSN terminal that is scheduling to of primary gateway.
Further, a plurality of gateways among the WSN also can adopt reciprocity mode of operation, and management platform is WSN terminal distribution among a WSN used gateway when inserting communication network so.
In sum; Through method and system provided by the invention; Can in a WSN, dispose a plurality of gateways; By a plurality of gateways is that WSN terminal among the WSN provides communication network to insert, thereby has improved the communication network access capability of WSN, can effectively solve the congested problem of wireless sensor network that exists when communication network is inserted at the WSN terminal.In addition; The corresponding relation of the gateway that management platform preservation WSN terminal is assigned with it; NE in the communication network can be set up and the communicating by letter of WSN terminal through the gateway that is assigned with; Like this NE in communication network set up with wireless sensor network in the communicating by letter of WSN terminal the time also can the NE in the communication network can be communicated by letter timely with the foundation of WSN terminal through a plurality of gateways in the wireless sensor network.
Combine concrete embodiment that cut-in method and the system of above-mentioned WSN are further set forth in detail below again.
System embodiment:
WSN is by one group of wireless sensor node equipment, the wireless network of forming with the self-organizing mode such as the WSN terminal; The WSN terminal room communicates with the short distance wireless communication technology.WSN is deployed in several meters usually to the regional extent of hundreds of rice, and wherein, the WSN terminal is normally battery-powered, has lower power consumption and cost.Close range communication techniques generally adopts Zigbee and IEEE 802.15.4 technology.
WSN combines with communication network, is meant WSN is connected with communication network, utilizes communication network that professional carrying is monitored, manages and accomplished to WSN and the business that provides thereof and implements with cooperation, and expand the business that WSN provided through communication network.Communication network comprises multiple communication networks such as mobile communications network, xDSL, FTTx, satellite communication.
In the present embodiment; When WSN combines with communication network; A plurality of WSN terminal among the WSN is as shown in Figure 1 through the system architecture diagram that a plurality of gateways insert communication network; The dash area with the cross spider filling among Fig. 1 is represented a plurality of WSN terminal, and the dash area that point is filled is represented the zone at place, a plurality of WSN terminal.Below the system architecture of Fig. 1 is specifically set forth.
Among Fig. 1; WSN is made up of a plurality of WSN terminal and a plurality of gateway; A plurality of WSN terminal and a plurality of gateway can be set up wireless sensor network according to the correlation technique standard of WSN, and the close range communication techniques that can be used for setting up WSN comprises Zigbee technology, IEEE 802.15.4 standard etc.WSN is connected to communication network through a plurality of gateways, communicates by letter with the foundation such as management platform of WSN in the communication network.Wherein, can adopt the mode of operation and the reciprocity mode of operation of principal and subordinate's gateway between a plurality of gateways.
In order to realize being connected of WSN and communication network that WSN passes through a plurality of gateways and inserts communication networks, and links to each other via the management platform of communication network with Access Network, core net, business platform, WSN.The WSN terminal is connected to communication network through a plurality of gateways.The WSN terminal is connected with gateway through a jumping or multi-hop for constituting the sensor node of WSN.WSN is responsible at the terminal gathering and uploading data, and receives and fill order.The several at least hundreds ofs at most in WSN terminal of forming WSN, WSN terminal room can be as required with star, the networkings of tree-like or netted (mesh) mode, wherein some WSN terminal or have stronger networking and the data forwarding ability.
Gateway is responsible for connecting WSN and communication network, mainly accomplishes functions such as protocol conversion, map addresses and data forwarding, also can integrated security and function such as charging.The function of gateway support can comprise: support the sensor network internal data to work in coordination with and converge; Support is with one or more of telecommunication access waies such as 2G mobile communication, 3G mobile communication, xDSL, FTTx, broadband wireless access, satellite/microwave, with the transfer of data that converges to Correspondent Node; Supporting business platform and remotely administered server are to the device authentication and the authentification of user of gateway; Supporting business platform and remotely administered server are to the parameter and the software arrangements of gateway; Support authentification of user and service security, equipment control security mechanism.
Business platform is the functional entity of the business that operation and management combine with WSN in the communication network, is responsible for integrating the business that each service provider provides, and it is offered the terminal use, uses professional situation to manage to the terminal use simultaneously.Business platform can be according to the needs of different business, and other functional entitys are accomplished whole service flow process, for example authentication, mandate and charging (AAA, AuthenticationAuthorization and Accounting) server in the collaborative communication network.Business platform can also be connected with remote server, directly business is upgraded.
The management platform of WSN is WSN to be implemented the entity of management function, and management platform can be made up of management server, and management server is implemented management function through communication network to WSN.
Method embodiment:
Method embodiment one of the present invention describes the process of WSN configuration multiple gateway, is specially:
At first create WSN by gateway in a plurality of gateways, after this gateway is created WSN, the information (as: network identity of WSN etc.) of WSN is sent to management platform, management platform is preserved the information of this WSN and this gateway.
The routing node that other gateway can be used as among the WSN joins this WSN, and idiographic flow is as shown in Figure 2, may further comprise the steps:
Here, said new gateway can establish a communications link with management platform through communication network after install in the WSN zone that application adds, and sends register requirement to management platform.Management platform can be carried out authentication through the identify label of said new gateway, confirms the authenticity of institute's new gateway identity.In management platform, preserve the information of new gateway to some extent in advance, this information comprises the network accessibility parameter of institute's new gateway, the position of installation etc.
Be responsible for the gateway that WSN creates among step 202, the management platform notice WSN, have the new gateway application to join this WSN.
Here, the WSN that the new gateway preparation adds is confirmed in the position that management platform prepares to install according to new gateway, notifies the gateway of creating this WSN to have the new gateway application to join this WSN then.Management platform can be simultaneously send to the gateway of creating this WSN with the information of this new gateway, and the information of this new gateway can comprise: the address of new gateway in communication network, network accessibility parameter etc.
Here, the gateway of creating WSN sends to management platform with the network configuration parameters that this new gateway joins this WSN and needs, and by management platform this network configuration parameters and the address of gateway in communication network of creating WSN is sent to this new gateway then.The network configuration parameters here comprises the address of gateway in WSN of creating WSN, initial master key etc.
Here, new gateway is carried out scan channel after obtaining the network configuration parameters of WSN in the overlay area of this WSN, sends association request (Association Request) frame to the gateway of creating this WSN then, and request joins this WSN.Said new gateway is held consultation according to initial master key with the gateway of creating this WSN, confirms netkey, link key and address etc.The new gateway record is from address and relevant routing iinformation in this WSN, and the gateway of creating this WSN writes down the address of said new gateway in this WSN and the information of said new gateway.
After gateway adds WSN, can communicate with the exchange correlation data through this WSN between the gateway etc.The IP address can be adopted in the address of gateway in communication network, owing to preserve the other side's the IP address in communication network between the gateway, both sides also can communicate through communication network.
Through the foregoing description one, can dispose a plurality of gateways among the WSN.
In the Zigbee network; In order to make the WSN terminal can add WSN; The WSN terminal needs elder generation to obtain to add the required network configuration parameters of WSN from the management platform of WSN, and network configuration parameters comprises: the address of the initial master key of the WSN that add and the gateway of creating WSN.When the WSN terminal adds WSN, create the gateway of WSN and verify the authenticity of the initial master key at WSN terminal, thereby verify the identity at this WSN terminal.If the initial master key at this WSN terminal is correct; Then allow this WSN terminal to add WSN; Can hold consultation based on initial master key between the gateway of WSN terminal and establishment WSN; Confirm to add the needed link key of this WSN, netkey and address etc., thereby realize WSN successful this WSN of adding in terminal.When not possessing the WSN terminal to apply adding WSN of network configuration parameters, not correct key, create the gateway of WSN and then can refuse this WSN of this WSN terminal adding because of initial master key or initial master key can not be provided.
Here; WSN terminal manufacturer is when producing the WSN terminal; In the WSN terminal, do not write the network configuration parameters of WSN, can be before coming into operation in the WSN terminal in the WSN terminal, write the network configuration parameters of its WSN that will add through client or other modes by management platform.Management platform can obtain to add the needed network configuration parameters of this WSN from the gateway of creating WSN.
It is pointed out that the management platform of WSN can obtain the network configuration parameters of WSN through dual mode.First kind of mode is: management platform is sent the WSN network configuration parameters request of obtaining to the gateway of creating WSN, and the gateway of creating WSN provides the WSN terminal to add the needed network configuration parameters of this WSN.The second way is: after WSN creates, the gateway of creating WSN will add the needed network configuration parameters of this WSN, offer the management platform of WSN, and preserve in the management platform of WSN.
Method embodiment of the present invention two describes and adopts among the WSN that the Zigbee technology sets up, and the WSN terminal adds WSN, and when adopting the mode of operation of master and slave gateway, is the process of this WSN terminal distribution gateway.In this process, primary gateway is the gateway of creating WSN.As shown in Figure 3, detailed process may further comprise the steps:
Step 301 writes the network configuration parameters of the WSN that the WSN terminal to apply adds in the WSN terminal.
In this step, the WSN terminal is placed on the WSN institute region covered of preparing adding.After the WSN starting up of terminal started, network sweep can be carried out earlier in the WSN terminal on the channel of setting, confirm the WSN that will add.Network sweep can be through sending beacon request (Beacon Request) frame on channel; After equipment among the WSN on this channel is received Beacon Request; Add this WSN if allow new WSN terminal; Whether will respond the Beacon frame, this Beacon frame has comprised the address information at the WSN terminal of sending this frame, and allow other WSN terminals to add with the mode of its child node.The WSN terminal is kept at the information of the Beacon frame of receiving in the contingency table (neighbor table) of self.
Here, suitable father node is selected at the WSN terminal in contingency table, and sends association request (Association Request) frame request adding WSN to father node.After the request that adds WSN was received at the WSN terminal that is in the father node of WSN, the primary gateway of notice WSN had new WSN terminal request to add WSN.
The primary gateway of WSN verifies that to the WSN terminal verification method can join the method for network according to node device in the Zigbee standard, and primary gateway is judged the authenticity of the initial master key in the WSN terminal.If the then operation of execution in step 303 is passed through in the checking of WSN terminal; If WSN terminal authentication failed is then carried out the operation of step 304.
Here, primary gateway is confirmed the employed gateway of this WSN terminal access communication network according to the correlation principle of gateway distribution.Primary gateway can be connected this WSN terminal information configuration information and sends to the gateway that is distributed with communication, and primary gateway is connected configuration information with the information of the gateway that is distributed and sends to this WSN terminal with said communication.
Said communication connects the needed link key that establishes a communications link between gateway that configuration information is this appointment and this WSN terminal, sets up safe communication through this link key between the gateway of this appointment and this WSN terminal and connects.
In this step, management platform is preserved the relevant information at this WSN terminal, comprises the corresponding relation of the sign, WSN terminal at WSN terminal and its affiliated WSN, the corresponding relation of gateway that the WSN terminal is assigned with it; Management platform also sends to business platform with the relevant information at WSN terminal, and the related data at business platform configuration WSN terminal is launched the business that the WSN terminal is supported.
It is thus clear that, through said process, write network configuration parameters in the WSN terminal and add the WSN of appointment, and the primary gateway of WSN specified this WSN terminal to insert the employed gateway of communication network, make this WSN terminal can be through gateway to the business platform reported data.
Need to prove that in order to insert information such as the employed gateway of communication network in the WSN terminal of writing down among the WSN, primary gateway is preserved the corresponding relation of the gateway that the WSN terminal among the WSN is assigned with it.
After the WSN terminal joins WSN; Possibly exist needs change WSN terminal to insert the situation of the employed gateway of communication network; For example: primary gateway can for WSN terminal select another one apart from this WSN terminal nearer from gateway; Thereby reduce this WSN terminal and, reach interior communication complexity of minimizing WSN and energy-conservation effect from the routed path between gateway.At this moment; Can be appointed as the new gateway that the WSN terminal provides communication network to insert by primary gateway; Primary gateway can be connected the gateway that configuration information sends to new appointment with communication with this WSN terminal information, and gateway is changed message informing was the gateway that this WSN terminal provides the communication network access originally.The gateway of new appointment adds the configuration information at this WSN terminal in this gateway, the communication network at this WSN terminal of preserving in this gateway of gateway deletion originally inserts configuration information.The gateway of new appointment inserts for this WSN terminal provides communication network, and gateway originally no longer inserts for this WSN terminal provides communication network.
The terminal that adds WSN is when leaving WSN; Primary gateway inserts the employed gateway of communication network with this WSN terminal; The communication network that can remove this WSN terminal of preserving separately inserts configuration information; The gateway that primary gateway is corresponding with this WSN terminal no longer inserts for this WSN terminal provides communication network after WSN is left at the WSN terminal.
Method embodiment of the present invention three describes and adopts among the WSN that the Zigbee technology sets up, and the WSN terminal adds WSN, and when adopting reciprocity mode of operation between the multiple gateway of WSN, is the process of this WSN terminal distribution gateway.In this process, management platform inserts the employed gateway of communication network for the WSN terminal distribution.As shown in Figure 4, detailed process may further comprise the steps:
Step 401 writes the network configuration parameters of the WSN that the WSN terminal to apply adds in the WSN terminal.
In this step, the WSN terminal is placed on the WSN institute region covered of preparing adding.After the WSN starting up of terminal started, network sweep can be carried out earlier in the WSN terminal on the channel of setting, confirm the WSN that will add.Network sweep can be through sending beacon request (Beacon Request) frame on channel; After equipment among the WSN on this channel is received Beacon Request; Add this WSN if allow new WSN terminal; Whether will respond the Beacon frame, this Beacon frame has comprised the address information at the WSN terminal of sending this frame, and allow other WSN terminals to add with the mode of its child node.The WSN terminal is kept at the information of the Beacon frame of receiving in the contingency table of self.
Here, suitable father node is selected at the WSN terminal in contingency table, and sends Association Request frame request adding WSN to father node.After the request that adds WSN was received at the WSN terminal that is in the father node of WSN, the gateway that notice is created WSN had new WSN terminal request to add WSN.
Create the gateway of WSN and the WSN terminal is verified verification method can join the method for network according to node device in the Zigbee standard, the gateway of creating WSN is judged the authenticity of the initial master key in the WSN terminal.If the then operation of execution in step 403 is passed through in the checking of WSN terminal; If WSN terminal authentication failed is then carried out the operation of step 404.
In this step, management platform is preserved this WSN terminal information, confirms the employed gateway of this WSN terminal access communication network according to the correlation principle that gateway distributes.Management platform can send to the information of the gateway that distributes the gateway of creating WSN, by this gateway the gateway information (like the address of gateway in WSN) that distributes is sent to this WSN terminal; The information of the gateway that is distributed is preserved at the WSN terminal, and is created to the routing iinformation of this gateway.Management platform receives and sends the communication link of this WSN terminal information (sign at WSN terminal, the address of WSN terminal in WSN) through communication network to the gateway that is distributed, this WSN terminal information of gateway record of said distribution.
The corresponding relation of the gateway that this WSN terminal of management platform preservation is assigned with it.
Step 408, management platform sends to business platform with the WSN terminal information, and the related data at business platform configuration WSN terminal is launched the business that the WSN terminal is supported.
Through the description of embodiment two and embodiment three, after the WSN terminal adds WSN, the corresponding relation of the gateway that the WSN terminal among the management platform preservation WSN is assigned with it; NE in the communication network can obtain the information that the employed gateway of communication network is inserted at the WSN terminal from management platform.
The business platform that method embodiment four of the present invention describes in the communication network is set up the process of communicating by letter with the WSN terminal among the WSN, and is as shown in Figure 5, may further comprise the steps:
Business platform comprises the sign at WSN terminal at least in the solicited message that management platform is sent.
Search in the corresponding relation that is identified at the gateway that the WSN terminal is assigned with it of management platform according to the WSN terminal; Obtain the sign of the gateway that this WSN terminal is assigned with; Inquire about in the information that is identified at the gateway that management platform preserves according to gateway then, acquire the information such as address of this gateway in communication network.The information that management platform will be inquired about the gateway that obtains sends to business platform.
In this step, business platform is set up communication according to the address of gateway in communication network with corresponding gateway.
In this step, the sign that business platform will be prepared the WSN terminal of foundation communication offers gateway, and gateway is inquired about in the WSN of its preservation terminal information, obtains the address at this WSN terminal, and communicates by letter with this WSN terminal foundation; WSN terminal and service terminal are set up through this gateway and are communicated by letter, the data of communicating by letter between gateway forwards WSN terminal and the business platform.
Through above-mentioned process, business platform can initiatively be initiated and the communicating by letter of foundation and WSN terminal, and other NEs in the communication network (except business platform, management platform) also can adopt above-mentioned process to set up and the communicating by letter of WSN terminal.
When management platform is initiatively set up with the communicating by letter of WSN terminal, inquire about in the corresponding relation of the gateway that management platform can be assigned with it through the WSN terminal that being identified at of WSN terminal self preserved, acquire the information of the gateway of correspondence; Set up with this gateway then and communicate by letter, and the sign at WSN terminal is offered this gateway; This gateway searches out corresponding WSN terminal and communicates by letter with the foundation of WSN terminal; Management platform and WSN terminal communicate through this gateway.
Again the above Zigbee technology passed through that relates to is set up WSN and to the related content that WSN manages, is explained as follows below:
ZigBee is the radio network technique of a kind of emerging short distance, low rate, low cost, low-power consumption.It adopts DSSS (DSSS, Direct Sequence Spread Spectrum) technology, and operating frequency is 868MHz, 915MHz or 2.4GHz.3 types node is arranged: ZigBee focal point, ZigBee routing node and ZigBee terminal node in the ZigBee network.
Wherein, the ZigBee focal point is also referred to as territory net (PAN, a Personal AreaNetwork) focal point (ZC, ZigBee Coordinator) in IEEE 802.15.4, in WSN, can be used as aggregation node.The ZigBee focal point must be full-function device (FFD, Full-Function Device), and a ZigBee network has only a ZigBee focal point, and it is with better function than other nodes in the network often, is the main controlled node of whole network.It is responsible for initiating to set up nodal information etc. in node and the storage networking in new network, setting network parameter, the supervising the network, also can carry out the function of router after network forms.
ZigBee routing node (ZR, ZigBee Router) also must be a full-function device.The ZigBee routing node can be participated in route discovery, forwards, comes coverage of extended network etc. through connecting other node.In addition, the ZigBee routing node can also serve as common focal point in its individual operating space (POS, Personal OperatingSpace), and IEEE 802.15.4 is called the focal point.Common focal point is different with the ZigBee focal point, and it still receives the control of ZigBee focal point.
ZigBee terminal node (ZE; ZigBee EndDevice) can be that full-function device is perhaps simplified function device (RFD; Reduced-Function Device); It withers a little through ZigBee association or the ZigBee routing node is connected to network, but does not allow other any nodes to add network through it, and the ZigBee terminal node can be with low-down power operation.
Among the present invention, primary gateway (or gateway of responsible WSN establishment) as the Zigbee focal point in the Zigbee network, is responsible for the establishment of WSN.The WSN terminal can be used as the Zigbee routing node or the Zigbee terminal node adds WSN; Add WSN from gateway (or other gateways except that the gateway of creating WSN) as the Zigbee routing node.The Zigbee communication technology need be supported in gateway and WSN terminal.
In addition, in order to realize the safety of Zigbee network, need encrypt the communication among the WSN; Cryptographic calculation in the Zigbee network; Adopt advanced encryption standard algorithm (AES, Advanced EncryptionStandard), the symmetric key length of employing is 128.The key that uses in the Zigbee network mainly comprises: master key (Master Key), link key (Link Key) and netkey (Network Key).Wherein, master key is to carry out symmetric key to set up a shared key that uses in the protocol procedures, is the basis of long-term safety between two equipment, and can be used for generating link key; Link key is a cipher key shared between two equipment in a PAN net, is used for two secure communications between the equipment; Netkey is the key of a PAN shared in network, is used for the safety of broadcast communication.
For the safety of realization Zigbee network and the management of key etc., there is trust center in the Zigbee network.Trust center is a kind of trusted devices of in network, distributing safety key, and its permission equipment adds network, and distributing key, thereby guarantees fail safe end to end between the equipment.In the network that adopts security mechanism, network coordination person can become trust center.Trust center provides following three kinds of functions:
(1) trust management: task is to be responsible for adding the device authentication of network.
(2) network management: task is to be responsible for obtaining with the distribution network key giving equipment.
(3) configuration management: task is the apparatus bound application program to its management, between two equipment, realizes safe transmission end to end.
In order to realize trust management, equipment need receive initial master key from trust center.In order to realize the purpose of network management, equipment should receive initial netkey, and can only obtain the renewal of netkey from trust center.In order to realize network configuration, equipment need receive master key or link key from trust center, to set up the end-to-end security link of two equipment rooms.
Except initial master key, additional link key, master key, netkey are merely able to adopt safe mode to obtain from trust center.Trust center should be updated periodically netkey according to a certain strategy, and sends new netkey to each equipment.
Among the present invention, carry out safety management of network as trust center by primary gateway.Can realize authentication and secure communication through the identify label of gateway between management platform in gateway and the telecommunications network and other NEs to gateway.
Among the present invention, through certain WSN of network identity identification of WSN.After gateway is created WSN, can perhaps confirm the network identity of this WSN by gateway, the relevant information that comprises network identity and network site of record WSN in the management platform by management platform.Thus, whether management platform can exist the WSN by the management of this management platform according to this position of given position judgment, if there is the sign of the WSN that WSN can obtain in this position, thereby confirms the WSN in this position.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.
Claims (12)
1. the connecting system of a wireless sensor network (WSN) is characterized in that, this system comprises: WSN and communication network, wherein, dispose a plurality of gateways among the said WSN, and comprise management platform and the NE of WSN in the said communication network,
Said management platform is used for preserving the corresponding relation of the gateway that the WSN terminal of WSN is assigned with it;
WSN terminal among the said WSN is used for inserting said communication network through the gateway that distributes;
Said NE is used for obtaining from management platform the information of the gateway that said WSN terminal is assigned with, and sets up and said WSN communication between terminals through the gateway information that obtains.
2. according to the connecting system of the said wireless sensor network of claim 1, it is characterized in that a plurality of gateways among the said WSN adopt principal and subordinate's mode of operation,
Primary gateway is used for carrying out the scheduling and the distribution of gateway at said a plurality of gateways, used gateway when inserting communication network for said WSN terminal distribution; The gateway that is distributed be primary gateway self or any one from gateway;
Said from gateway, be used for providing communication network to insert according to the said WSN of being scheduling to of said primary gateway terminal.
3. according to the connecting system of the said wireless sensor network of claim 2; It is characterized in that; Said primary gateway is further used for, when said WSN terminal to apply adds WSN, and employed gateway when inserting said communication network for said WSN terminal distribution; Said WSN terminal information, communication are connected configuration information send to the gateway that is distributed, and information, the communication connection configuration information of gateway distribution sent to said WSN terminal; The corresponding relation of the gateway that also is used for said WSN terminal is assigned with it sends to said management platform and preserves.
4. according to the connecting system of claim 2 or 3 said wireless sensor networks; It is characterized in that said management platform is further used for, when receiving said register requirement from gateway; Write down said relevant information, and notify said primary gateway to have new to add WSN from gateway from gateway; Wherein, said relevant information from gateway comprises at least: said from the sign of gateway with from the address of gateway communication network;
Accordingly, said primary gateway is further used for, and will join the needed network configuration parameters of said WSN and send to said from gateway;
Saidly be further used for, use the network configuration parameters that obtains to join said WSN from gateway.
5. according to the connecting system of the said wireless sensor network of claim 1, it is characterized in that a plurality of gateways among the said WSN adopt reciprocity mode of operation,
Said management platform is further used for, used gateway when inserting communication network for the WSN terminal distribution among the said WSN.
6. according to the connecting system of claim 1,2,3 or 5 said wireless sensor networks; It is characterized in that; Said NE is further used for, and sends the request of obtaining the gateway that the WSN terminal is assigned with to said management platform, wherein comprises the sign at said WSN terminal at least;
Accordingly, said management platform is further used for, and confirms the information of the gateway that said WSN terminal is assigned with and offers said NE;
Said NE is further used for, and establishes a communications link according to information and the said gateway of the gateway that obtains, and the sign at said WSN terminal is offered the gateway that is assigned with, through communicating by letter of the gateway foundation that is assigned with and said WSN terminal.
7. the cut-in method of a wireless sensor network is applied to the network architecture that WSN and communication network combine, and it is characterized in that, this method comprises:
The a plurality of gateways of configuration in said WSN, the corresponding relation of the gateway that the WSN terminal among the management platform preservation WSN in the said communication network is assigned with it;
Said communication network is inserted through the gateway that distributes in WSN terminal among the said WSN, and said NE obtains the information of the gateway that said WSN terminal is assigned with from management platform, and sets up and said WSN communication between terminals through the gateway information that obtains.
8. according to the cut-in method of the said wireless sensor network of claim 7, it is characterized in that a plurality of gateways among the said WSN adopt principal and subordinate's mode of operation, this method further comprises:
Primary gateway is carried out the scheduling and the distribution of gateway in said a plurality of gateways, used gateway when inserting communication network for said WSN terminal distribution; The gateway that is distributed be primary gateway self or any one from gateway;
Provide communication network to insert from gateway according to the said WSN of being scheduling to of said primary gateway terminal.
9. the cut-in method of said wireless sensor network according to Claim 8; It is characterized in that; This method further comprises: when said primary gateway adds WSN at said WSN terminal to apply; Employed gateway when inserting said communication network for said WSN terminal distribution connects configuration information with said WSN terminal information, communication and sends to the gateway that is distributed, and information, the communication connection configuration information of gateway distribution sent to said WSN terminal; The corresponding relation of the gateway that also said WSN terminal is assigned with it sends to said management platform and preserves.
10. according to Claim 8 or the cut-in method of 9 said wireless sensor networks, it is characterized in that this method further comprises:
Said management platform writes down said relevant information from gateway when receiving said register requirement from gateway, and notifies said primary gateway to have new to add WSN from gateway; Wherein, said relevant information from gateway comprises at least: said from the sign of gateway with from the address of gateway communication network;
Said primary gateway will join the needed network configuration parameters of said WSN and send to said from gateway;
The said network configuration parameters that obtains from the gateway use joins said WSN.
11. the cut-in method according to the said wireless sensor network of claim 7 is characterized in that, a plurality of gateways among the said WSN adopt reciprocity mode of operation, and this method further comprises:
Said management platform is the used gateway when inserting communication network of the WSN terminal distribution among the said WSN.
12. cut-in method according to claim 7,8,9 or 11 said wireless sensor networks; It is characterized in that; Said NE obtains the information of the gateway that the WSN terminal is assigned with from management platform, and sets up and the WSN communication between terminals through the gateway information that obtains, and is specially:
Said NE sends the request of obtaining the gateway that the WSN terminal is assigned with to said management platform, wherein comprises the sign at said WSN terminal at least;
Said management platform is confirmed the information of the gateway that said WSN terminal is assigned with and is offered said NE;
Said NE establishes a communications link according to information and the said gateway of the gateway that obtains, and the sign at said WSN terminal is offered the gateway that is assigned with, through communicating by letter of the gateway foundation that is assigned with and said WSN terminal.
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| CN114268650A (en) * | 2021-12-20 | 2022-04-01 | 中国电信股份有限公司 | Configuration method and system for establishing communication connection |
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| WO2012065418A1 (en) | 2012-05-24 |
| CN102469553B (en) | 2016-06-08 |
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