CN102404195A - Data transmission method, gateway and network system - Google Patents
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Abstract
The invention discloses a data transmission method, a gateway and a network system. The data transmission method comprises the following steps of receiving a data request IP data packet sent by a terminal, wherein the target address in the data request IP data packet is a virtual IP address corresponding to the data type of the data requested by the terminal; according to the corresponding relationship among the IP address, data type and sensor node, obtaining a sensor node corresponding to the virtual IP address in the data request IP data packet; converting the data request IP data packet to a data request Wireless Sensor Network (WSN) data packet, and sending the data request WSN data packet to the sensor node in order to obtain the data collected by the sensor node. The embodiment technical proposal of the invention can effectively reduce number of the distributed virtual IP address and improve data transmission efficiency according to the data request of the virtual IP address to the sensor node.
Description
Technical field
The embodiment of the invention relates to the communication technology, relates in particular to a kind of data transmission method, gateway and network system.
Background technology
Wireless sensor network (Wireless Sensor Network; WSN) fields such as environmental monitoring, stock tracking have been widely used in; Wireless sensor network inside is to carry out transfer of data through the WSN communication transport protocols; And the terminal of node in the wireless sensor network and far-end then need be passed through traditional I P (Internet Protocol, network interconnection agreement) network and realize when carrying out data interaction.
The communication protocol of WSN and IP network is also inequality; Can't directly carry out data communication between each sensor node among the WSN and the terminal in the IP network; But realize the data communication between sensor node and the terminal through the gateway of the relaying action that is provided with; Wherein, the gateway that is provided with in the WSN can carry out protocol conversion, carries out data communication to realize the terminal in sensor node and the IP network.In the prior art; When sensor node and terminal communicate; For each sensor node among the WSN distributes virtual ip address; And be a virtual WSN of the terminal distribution address in the IP network, thereby utilize the virtual ip address of the sensor node that distributes and the virtual WSN address at terminal to realize the data communication between sensor node and the terminal, mainly may further comprise the steps:
When step 100, sensor node access wireless sensor network; Gateway is that sensor node distributes one 16 short address; This short address of 16 promptly is the WSN address of sensor node in WSN; And generate one and this corresponding virtual IP address, short address simultaneously, be stored in the mapping relations table;
Step 200, gateway are a virtual WSN of the terminal distribution address in the IP network of visit, with the real IP address correspondence at the virtual WSN address and the terminal at this terminal, and are kept in the mapping relations table;
Step 300, when the terminal need ask to obtain the data of sensor node; Solicited message is packaged into the IP packet; And send, the destination address of this IP packet is the virtual ip address that needs the sensor node of visit, source address is the real IP address of self;
When step 400, IP packet arrival gateway; Gateway is according to the mapping relations table of preserving; Find out with the IP packet in 16 corresponding short addresses of virtual ip address, and with the real IP address corresponding virtual WSN address at terminal, and the IP packet carried out the packet header protocol conversion; Convert the WSN packet that meets the WSN communications protocol format to; Send to corresponding sensor node, the source address in this WSN packet is the virtual WSN address at terminal, and destination address is 16 short addresses of sensor node;
After step 500, sensor node are received the WSN packet, image data, and generate the WSN packet that comprises institute's image data, and feeding back to gateway, the destination address in the packet is the virtual WSN address at terminal, source address is 16 short addresses of sensor node;
Step 600, gateway are according to the virtual WSN address at terminal in the WSN packet that comprises the sensor node image data; Find out the real IP address at the terminal corresponding with it, and with the corresponding virtual IP address, short address of sensor node, this WSN packet is carried out the packet header protocol conversion; After converting the IP packet to; Be transmitted to the terminal in the IP network, the source address in this IP packet is the virtual ip address of sensor node, and destination address is the real IP address at terminal.
To sum up, the sensor node among the existing WSN with IP network in terminal when carrying out data interaction, gateway need distribute virtual ip address respectively for each sensor node; Because sensor node is more among the WSN; Will be very huge for the quantity of each sensor node distribution virtual ip address, this wants the IP resource of labor, and gateway is very complicated to the management meeting of virtual ip address simultaneously; Be unfavorable for the data communication between sensor node and the terminal, data transmission efficiency is lower.
Summary of the invention
The embodiment of the invention provides a kind of data transmission method, gateway and network system, when data communication is carried out at the terminal in WSN in sensor node and the IP network, can reduce the quantity of the virtual ip address of distribution, improves data transmission efficiency.
The embodiment of the invention provides a kind of data transmission method, comprising:
The request of data IP packet that receiving terminal sends, the destination address in the said request of data IP packet is the data type corresponding virtual IP address of the data of asking with the terminal;
According to the corresponding relation between virtual ip address, data type and the sensor node, obtain the virtual ip address corresponding sensor node in the said request of data IP packet;
Convert said request of data IP packet to request of data WSN packet, and said request of data WSN packet is sent to said sensor node, obtain the data that said sensor node is gathered with request.
The embodiment of the invention provides a kind of gateway, comprising:
The request receiver module is used for the request of data IP packet that receiving terminal sends, and the destination address in the said request of data IP packet is the data type corresponding virtual IP address of the data of asking with the terminal;
The node acquisition module is used for according to the corresponding relation between virtual ip address, data type and the sensor node, obtains the virtual ip address corresponding sensor node in the said request of data IP packet;
Request sending module is used for converting said request of data IP packet to request of data WSN packet, and said request of data WSN packet is sent to said sensor node, obtains the data that said sensor node is gathered with request.
The embodiment of the invention provides a kind of network system, comprises gateway and terminal, wherein:
Said terminal is used to send request of data IP packet, and the destination address in the said request of data IP packet is the data type corresponding virtual IP address of the data of asking with the terminal;
Said gateway; Be used for according to the corresponding relation between virtual ip address, data type and the sensor node; Obtain the virtual ip address corresponding sensor node in the said request of data IP packet; And be used for converting said request of data IP packet to request of data WSN packet, be sent to said sensor node and obtain the data that said sensor node is gathered with request.
The data transmission method that the embodiment of the invention provides, gateway and network system; When data communication was carried out at the terminal in WSN in sensor node and the IP network, the terminal can be all the sensors node request msg of this data type to image data based on data type corresponding virtual IP address; In data transmission procedure; Only need distribute virtual ip address for data type, the virtual ip address negligible amounts of distribution makes that the maintenance and management of virtual ip address is simple; Can effectively improve the convenience of transfer of data, improve data transmission efficiency.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use among the embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
The data transmission method schematic flow sheet that Fig. 1 provides for the embodiment of the invention one;
The data transmission method schematic flow sheet that Fig. 2 provides for the embodiment of the invention two;
The schematic flow sheet that the data of in the data transmission method that Fig. 3 provides for the embodiment of the invention three sensor node being sent are handled;
The schematic flow sheet that Fig. 4 handles for the data of in the data transmission method that provides in the embodiment of the invention four sensor node being sent;
The network environment structural representation that the data transmission method that Fig. 5 provides for the embodiment of the invention five is used;
The schematic flow sheet of the data transmission method that Fig. 6 provides for the embodiment of the invention five;
The structural representation of the gateway that Fig. 7 provides for the embodiment of the invention six;
The structural representation of the gateway that Fig. 8 provides for the embodiment of the invention seven;
The structural representation of the gateway that Fig. 9 provides for the embodiment of the invention eight;
The structural representation of the gateway that Figure 10 provides for the embodiment of the invention nine;
The structural representation of the network system that Figure 11 provides for the embodiment of the invention ten.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The data transmission method schematic flow sheet that Fig. 1 provides for the embodiment of the invention one.As shown in Figure 1, the present embodiment data transmission method can may further comprise the steps:
The request of data IP packet that step 101, receiving terminal are sent, the destination address in this request of data IP packet is the data type corresponding virtual IP address of the data of asking with the terminal;
Present embodiment can be applicable among the WSN in the data communication between the terminal in the sensor node and IP network; The terminal can based on data type corresponding virtual IP address as destination address, initiate request of data to all the sensors node with the data of gathering this data type.Because the data type of the data that each sensor node is gathered among the WSN is more single; The data type of the data of each sensor node collection is certain; The data of data type such as temperature for example; Like this; When carrying out request of data based on data type corresponding virtual IP address, request of data only need be initiated to the data type corresponding virtual IP address of the data of its request in the terminal, and the gateway among the WSN just can be according to the corresponding relation between virtual ip address, data type and the sensor node himself stored; Confirm the data type corresponding sensor node of the data that ask at the terminal, thereby to those required data in sensor node acquisition request terminal.
In the present embodiment, described IP packet is meant the packet that meets IP communication protocol, and it can carry out data communication in IP network; Described WSN packet is meant the packet that meets WSN communication protocol; It can carry out data communication in WSN; Wherein, convert the IP packet to the WSN packet, carry out protocol conversion exactly; Become to meet the data of WSN communication protocol with the data transaction that will meet IP communication protocol, otherwise the data transaction that will meet WSN communication protocol becomes to meet the data of IP communication protocol.
To sum up, present embodiment is when data communication is carried out at the terminal in sensor node and the IP network in WSN, and the terminal can be based on data type corresponding virtual IP address; To image data is the sensor node request msg of this data type, in data transmission procedure, only need distribute virtual ip address for data type; The virtual ip address negligible amounts that distributes; Make that the maintenance and management of virtual ip address is simple, can effectively improve the convenience of transfer of data, improve data transmission efficiency.
The data transmission method schematic flow sheet that Fig. 2 provides for the embodiment of the invention two.As shown in Figure 2, the present embodiment data transmission method may further comprise the steps:
The request of data IP packet that step 201, receiving terminal send; Destination address in this request of data IP packet is the data type corresponding virtual IP address of the data of asking with the terminal, and carries the data type of terminal request data in this request of data IP packet;
Whether the data type of carrying in the virtual ip address corresponding data types in step 203, the judgment data request IP packet and the request of data IP packet is consistent; It is execution in step 204 then; Otherwise the request failure at terminal is returned request failure message to the terminal; With notice terminal data request failure, finish;
Owing to possibly have identical virtual ip address between the different WS N; The request of data IP packet that gateway among the WSN receives possibly be the request of data that the terminal sends to other WSN, and for avoiding that the request of data IP packet of the mistake that receives is handled, present embodiment is through the data type of carried terminal institute request msg in request of data IP packet; Make when gateway receives this IP packet; Can judge virtual ip address corresponding data types wherein whether with the IP packet in the data type of carrying whether consistent, consistent then explain that the terminal is the request of data that WSN sends under gateway, can handle the data request; Otherwise; Explain that the terminal is the request of data that WSN sends under other gateway, can return the request failure information, can effectively improve the accuracy and the reliability of data processing to the terminal.
The schematic flow sheet that the data of in the data transmission method that Fig. 3 provides for the embodiment of the invention three sensor node being sent are handled.On the basis of above-mentioned Fig. 2 or case technology scheme shown in Figure 3; Present embodiment also can be handled the feedback data that each sensor node returns according to request of data; Data so that sensor node is returned are sent to the terminal; Particularly, present embodiment is handled and can be may further comprise the steps the data that sensor node sends:
The data feedback WSN packet that step 301, receiving sensor node return, this data feedback WSN packet comprises the data that sensor node is gathered;
The data type corresponding virtual IP address of step 302, the data of gathering with sensor node is fed back the WSN packet with data and is converted data feedback IP packet to as source address, sends to the terminal.
In the present embodiment, after each sensor node receives request of data WSN packet, can the form that the data of gathering are fed back the WSN packet with data be fed back to gateway; After gateway receives data feedback WSN packet; Can be according to the corresponding relation between virtual ip address, data type and the sensor node; Obtain the data type and the corresponding virtual IP address of the data that sensor node gathers, pack the data to the IP packet after, be sent to the terminal.
The schematic flow sheet that Fig. 4 handles for the data of in the data transmission method that provides in the embodiment of the invention four sensor node being sent.Different with above-mentioned technical scheme embodiment illustrated in fig. 3 is; When present embodiment feeds back to the terminal at the node with sensor acquisition; The packing data that can a plurality of sensor nodes be gathered sends to the terminal, particularly in an IP packet; As shown in Figure 4, present embodiment is handled and can be may further comprise the steps the data that sensor node sends:
The data feedback WSN packet that step 401, receiving sensor node return, this data feedback WSN packet comprises the data that sensor node is gathered;
The same data type corresponding virtual IP address of step 402, the data of gathering with a plurality of sensor nodes is as source address, and the packing data that these a plurality of sensor nodes are gathered sends to the terminal in a data feedback IP packet.
Because the sensor node of the data that ask at the same terminal of response is more, if the data that each sensor node returns send to the terminal respectively, will inevitably waste a large amount of Internet resources; Cause data transmission efficiency relatively poor; In the embodiment of the invention, the data through a plurality of sensor nodes that will send to same terminal are gathered are packaged in the IP packet and send to the terminal; Can effectively improve data transmission efficiency, reduce the Internet resources that take.
The network environment structural representation that the data transmission method that Fig. 5 provides for the embodiment of the invention five is used; The schematic flow sheet of the data transmission method that Fig. 6 provides for the embodiment of the invention five.As shown in Figure 5; Present embodiment is applied in the data interaction of WSN and IP network, and this network environment comprises WSN and IP network, wherein; Be provided with a plurality of sensor nodes and gateway among the WSN; Sensor node is used to gather the data of a certain data type, and gateway is used for setting up the data communication between sensor node and the IP network terminal, and can carry out the data communication based on WSN communication protocol between each sensor node among the same WSN and the gateway; Gateway is through the network router in the IP network; Communicate with terminal in the IP network and to be connected; It can be with meeting IP protocol of I P packet in the IP network, carry out protocol conversion after, the IP packet is converted to the WSN packet that meets WSN communication protocol; On the contrary, also can convert the WSN packet to the IP packet.
In the present embodiment; The data of each sensor node collection include humiture (Temperature Humidity), sulfur dioxide SO2, methane CH4 and four kinds of data types of carbon monoxide CO among the WSN shown in Figure 5, and each transducer only can collect a kind of data of data type.When the data of a certain data type need be asked in the terminal in the IP network; The data transmission method that just can provide based on the embodiment of the invention, the sensor node request msg in WSN, particularly; As shown in Figure 6, the present embodiment data transmission method can may further comprise the steps:
When step 501, sensor node access WSN; Gateway among the WSN can distribute 16 short address for sensor node; Simultaneously; Set up the corresponding relation between the data type of the short address of sensor node and the data that sensor node is gathered, be recorded in the short address and data type mapping table of sensor node.
Wherein, gateway is 16 short addresses that sensor node distributes, and is exactly the WSN address of sensor node in this WSN, makes that sensor node can be according to the data communication between this short address foundation and the gateway.The short address of sensor node and data type mapping table can be referring to shown in the tables one.
Table one
| The short address of sensor node | The data type of the data that sensor node is gathered |
| 0x0001 | Temperature&Humidity |
| 0x0002 | SO 2 |
| 0x0003 | CO |
| 0x0004 | Temperature&Humidity |
| 0x0005 | CH 4 |
| 0x0006 | Temperature&Humidity |
| 0x0007 | SO 2 |
Only provided the short address of operative sensor node among the WSN shown in Figure 5 and the corresponding relation between the data type in this table one, each sensor node among the WSN is all corresponding to a certain data type, to represent the data type of the collectable data of this sensor node.
The gateway of terminal in step 502, the IP network in WSN sends query requests IP packet, comprises the data type of the data of its query requests of wanting in this query requests IP packet.
Step 503, gateway can for data type is distributed virtual ip address, and be set up the mapping table between virtual ip address and the data type according to the data type of the data of the requesting query of wanting in this query requests IP packet.
Suppose that real IP address is that the data type that the data of inquiry are initiated at the terminal of 192.11.45.2 is the humiture data; Real IP address is that the data type that the data of inquiry are initiated at the terminal of 192.11.45.1 is the data of CO; Real IP address is that the data type that the data of inquiry are initiated at the terminal of 10.0.0.172 is the data type of humiture; Then each terminal can be respectively with self real IP address as source address, the frame load for the data type of the data that will inquire about, the order way address is the real IP address of the gateway among the WSN; Be packaged into query requests IP packet, the gateway in WSN is initiated query requests.
For ease of gateway the frame load in the IP packet is discerned; The frame load should be followed the data format that the WSN application layer is supported; The data of wireless communication technology ZigBee protocol format etc. for example, the form of the query requests IP packet that send at each terminal can be referring to shown in the table two.
Table two
| Source address | Destination address | The frame load |
| 192.11.45.2 | 172.16.1.23 | Temperature&Humidity |
| 192.11.45.1 | 172.16.1.23 | CO |
| 10.0.0.172 | 172.16.1.23 | Temperature&Humidity |
In the present embodiment, the IP address of the gateway among the WSN in IP network is 172.16.1.23, when it receives the query requests IP packet that sends at the terminal, just can confirm the data type of its requesting query data of wanting according to the frame load in this IP packet.
The data type corresponding virtual IP address of each terminal request data query, and virtual ip address and data type corresponding relationship table can be referring to tables three.
Table three
| Data type | Virtual ip address |
| Temperature&Humidity | 10.0.0.1 |
| CO | 10.0.0.2 |
Can find out that from table three every kind of data type is only distributed a corresponding virtual IP address, like this, the request of data based on virtual ip address just can be initiated in the terminal, with the data of acquisition with this virtual ip address corresponding data types.
The virtual ip address that step 504, gateway will be distributed for the data type of terminal institute requesting query data feeds back to the terminal.
Gateway can be carried at the data type corresponding virtual IP address for the terminal request inquiry in the frame load in the IP packet, feeds back to the terminal, wherein shown in the visible table four of the form of IP packet.
Table four
| Source address | Destination address | The frame load |
| 172.16.1.23 | 192.11.45.2 | 10.0.0.1 |
| 172.16.1.23 | 192.11.45.1 | 10.0.0.2 |
| 172.16.1.23 | 10.0.0.172 | 10.0.01 |
After the terminal receives the virtual ip address of gateway feedback, can initiate request of data with this virtual ip address as destination address with this virtual ip address corresponding data types.
When step 505, terminal need the sensor node request in WSN obtain data; Can with its data type corresponding virtual IP address of the data that will ask as destination address; Create request of data IP packet and send the data of the sensor node request desired data type in WSN.
Wherein, the form of the request of data IP packet of terminal initiation can be referring to table five.
Table five
| Source address | Destination address | The frame load |
| 192.11.45.2 | 10.0.0.1 | data1 |
| 192.11.45.1 | 10.0.0.2 | data?2 |
| 10.0.0.172 | 10.0.0.1 | data3 |
In the table five; In the request of data IP packet that initiate at the terminal; The frame load is a data load of following the WSN protocol format; When the gateway among the WSN receives this request of data IP packet, can confirm the data type of terminal institute request msg according to the data type and the virtual ip address mapping table of above-mentioned steps 502 foundation.Wherein in the data (data) in the IP packet of each terminal initiation, data1 is Temperature & Humidity, and data2 is CO, and data3 is Temperature & Humidity, is wanted the data type of request msg to represent each terminal.
After gateway among step 506, the WSN receives this request of data IP packet; According to virtual ip address as destination address; From virtual ip address shown in the above-mentioned table three and data type mapping table; Confirm that the terminal wants the data type of request msg, and real IP address and virtual ip address, the data type corresponding relation at terminal stored.
The real IP address at terminal and virtual ip address, data type corresponding relation can be referring to shown in the tables six.
Table six
Step 507, convert request of data IP packet to request of data WSN packet, send to virtual ip address corresponding sensor node.
Wherein, Virtual ip address corresponding sensor node can obtain according to the corresponding relation in table one and the table three; When being packaged into request of data WSN packet, the source address of request of data WSN packet is the WSN address of gateway, destination address; Be the short address of each corresponding sensor node of virtual ip address, the load in the WSN packet is the data type of the load representative in the corresponding IP packet.
The form of request of data WSN packet can be referring to shown in the table seven.
Table seven
| Source address | Destination address | The frame load |
| 0x0000 | 0x0001 | Temperature&Humidity |
| 0x0000 | 0x0004 | Temperature&Humidity |
| 0x0000 | 0x0006 | Temperature&Humidity |
| 0x0000 | 0x0003 | CO |
Shown in table seven, the WSN address of gateway in WSN is 0x0000 in the present embodiment, like this, to the sensor node request msg time, is based on the request of the WSN address initiation of gateway.
Step 508, receive request of data WSN packet after, sensor node can become data feedback WSN packet with the packing data of gathering, and sends to gateway.
Sensor node can become data feedback WSN packet with the packing data of gathering; Be sent to gateway; The destination address of this data feedback WSN packet is the WSN address of gateway, and source address is the short address of sensor node, and the data load of carrying is the data (Reply data) of collection.
The form of the data feedback WSN packet of each sensor feedback can be referring to shown in the table eight.
Table eight
| Source address | Destination address | The frame load |
| 0x0001 | 0x0000 | Reply?data?1 |
| 0x0004 | 0x0000 | Reply?data4 |
| 0x0006 | 0x0000 | Reply?data?6 |
| 0x0003 | 0x0000 | Reply?data?3 |
Step 509, gateway can be confirmed the corresponding virtual IP address, short address of transducer and the real IP address at terminal according to the mapping table shown in table one and the table six after receiving data feedback WSN packet; Thereby after can data being fed back the WSN packet and carry out protocol conversion; Be packaged into data feedback IP packet, feed back to relevant terminal, wherein; The source address of data feedback IP packet is a virtual ip address, and destination address is the real IP address at terminal.
Because the frame load length of IP address is longer, therefore,, can all data that are sent to same terminal be packaged in the IP packet for improving the efficient of transfer of data, feed back to the terminal.Particularly, obtain the data that the sensor node in the data feedback WSN packet that each transducer returns is gathered; The data type corresponding virtual IP address of the data of gathering with sensor node is as source address, and the packing data of the same data type that each transducer is returned becomes an IP packet, sends to the terminal.Wherein, the form of data feedback IP packet can be referring to shown in the table nine.
Table nine
| Source address | Destination address | The frame load |
| 10.0.0.1 | 192.11.45.2 | Reply?data?1&Reply?data4&Reply?data?6 |
| 10.0.0.1 | 10.0.0.172 | Reply?data?1&Reply?data4&Reply?data?6 |
| 10.0.0.2 | 192.11.45.1 | Reply?data?3 |
Because the terminal is when the data of a certain data type of request; There is more sensor node feedback data in meeting among the WSN, through all the sensors node feedback data is combined in the IP packet, feeds back to the terminal again; Can effectively improve the efficient of transfer of data; Improve external network bandwidth resources utilance, the number guaranteeing can reduce under the complete prerequisite of data the IP packet of forwarding improves data forwarding efficient.
When step 510, terminal receive data feedbacks IP packet, can extract the data in the frame load, these data be the terminal the data that will ask.
Among the invention described above embodiment; When if each sensor node can have the data acquisition ability of a plurality of data types simultaneously; Each sensor node also can be according to the data type of carrying in the request of data WSN packet, gather with this WSN packet in the corresponding data of data type of carrying.Particularly; When converting request of data IP packet to request of data WSN packet; Specifically can the virtual ip address corresponding data types in the IP packet be carried in the request of data WSN packet; Virtual ip address corresponding data types in this request of data IP packet is used to indicate the data type of needs collection, carries out data acquisition so that receive the sensor node of request of data WSN packet according to data type.In the practical application; Can be according to the corresponding relation between virtual ip address, data type and the sensor node; Obtain the virtual ip address corresponding data types; Data type is carried in the request of data WSN packet, perhaps the data type in the request of data IP packet that send at the terminal directly converts request of data IP packet to request of data WSN packet.
It will be appreciated by those skilled in the art that; In above-mentioned steps 502 and the step 503; For data type is distributed virtual ip address; Also can be the data type of gateway, be the virtual ip address that each data type is distributed, make virtual ip address, data type and sensor node corresponding according to its each sensor node institute image data of managing; When the terminal request data query, gateway can feed back to the terminal with the data type corresponding virtual IP address of its data of asking; Perhaps; Gateway also can be with the virtual ip address of its distribution and the corresponding relation between the data type; Initiatively report the terminal; When the data of a certain data type need be inquired about in the terminal, the terminal just can be based on the corresponding relation between virtual ip address and the data type, initiated request of data to the data type corresponding virtual IP address of the data of its request.
It will be appreciated by those skilled in the art that; Except can be applicable to above-mentioned network environment shown in Figure 5; Realization is to outside the transfer of data among the WSN of the data acquisition of humiture, sulfur dioxide, methane and carbon monoxide; Present embodiment also can be applicable among the WSN of other data acquisition type, and for example kilowatt meter reading-out system etc. is not done special restriction at this.
The structural representation of the gateway that Fig. 7 provides for the embodiment of the invention six.This enforcement gateway comprises request receiver module 11, node acquisition module 12 and request sending module 13, wherein:
Request sending module 13; Be connected with request receiver module 11 with node acquisition module 12; Be used for converting request of data IP packet to request of data WSN packet; And request of data WSN packet is sent to the virtual ip address corresponding sensor node in the request of data IP packet, obtain the data that sensor node is gathered with request.
The present embodiment gateway can be applicable among the WSN; As the trunking between WSN and the IP network; Data communication between the terminal among the realization WSN in sensor node and the IP network, its concrete implementation procedure can repeat no more at this referring to the explanation of the invention described above method embodiment.
The structural representation of the gateway that Fig. 8 provides for the embodiment of the invention seven.As shown in Figure 8, in the present embodiment gateway, request sending module 13 specifically can comprise packet converting unit 131 and data transmission unit 132, wherein:
The sensor node that present embodiment can be applicable to WSN has in the data acquisition of a plurality of data types, and like this, sensor node can carry out data acquisition according to the data type of carrying in the WSN packet that receives, for the terminal provides required data.
In the present embodiment; After request receiver module 11 receives request of data IP packet; Can confirm the virtual ip address corresponding data types according to the corresponding relation between virtual ip address, data type and the sensor node, thereby this data type is carried in the request of data WSN packet.In the practical application, in the request of data IP packet that send at the terminal also portability the data type of the data that the terminal asks is arranged, get final product thereby can directly convert request of data IP packet to request of data WSN packet.Its concrete implementation procedure can repeat no more at this referring to the explanation of the invention described above method embodiment.
The structural representation of the gateway that Fig. 9 provides for the embodiment of the invention eight.As shown in Figure 9, in the present embodiment gateway, also carry the data type of terminal institute request msg in the request of data IP packet that request receiver module 11 obtains; Node acquisition module 12 specifically can comprise data type acquiring unit 121, judging unit 122 and node acquiring unit 123, wherein:
Data type acquiring unit 121 is used for according to the corresponding relation between virtual ip address, data type and the sensor node, obtains the virtual ip address corresponding data types in the request of data IP packet;
Whether the data type of carrying in the judging unit 122, the virtual ip address corresponding data types that is used for judgment data request IP packet and request of data IP packet is consistent;
Whether present embodiment can be judged for sending to the Home Network pass the request of data IP packet that send at the terminal, to avoid among the different WS N because of existing identical virtual ip address to cause the IP packet to send mistake.Its concrete implementation procedure can repeat no more at this referring to the explanation of the invention described above method embodiment.
The structural representation of the gateway that Figure 10 provides for the embodiment of the invention nine.On the basis of above-mentioned Fig. 7,8 or 9 illustrated embodiment technical schemes, shown in figure 10, the present embodiment gateway also can comprise data reception module 14 and data transmission blocks 15, wherein:
Data transmission blocks 15 is connected with data reception module 14, and the data type corresponding virtual IP address of the data that are used for gathering with sensor node is fed back the WSN packet with data and converted data feedback IP packet to as source address, sends to said terminal.
In the present embodiment; But the request of data WSN packet that data reception module 14 receiving sensor nodes send according to request sending module 13 and feedback data; And after can this packing data being become the IP packet; Send to the terminal, its concrete implementation procedure can repeat no more at this referring to the explanation of foregoing invention method embodiment.
In the present embodiment; The same data type corresponding virtual IP address of the data that above-mentioned data transmission blocks 15 specifically can be used for gathering with a plurality of sensor nodes is as source address; In packing data Cheng Zaiyi the data feedback IP packet with a plurality of sensor acquisition, send to the terminal.All packing data through feeding back to same terminal are sent in an IP packet, can effectively reduce packet and send number, improve data transmission efficiency.
Shown in figure 10; The present embodiment gateway also can comprise address assignment module 16; When being used to monitor transducer and connecing node and insert; Be that sensor node distributes the WSN address, and the data type of the data of sensor acquisition is corresponding with the WSN address of sensor node, the corresponding relation between acquisition sensor node and the data type; In addition; The present embodiment gateway also can comprise virtual ip address distribution module 17 and virtual ip address feedback module 18; Wherein, Virtual ip address distribution module 17 is used for wanting according to the query requests IP packet that send at the terminal data type of requesting query data, for data type is distributed virtual ip address, and sets up the corresponding relation between data type and the virtual ip address; Virtual ip address feedback module 18 is connected with virtual ip address distribution module 17, is used for the virtual ip address that distributes for data type is fed back to said terminal.
The structural representation of the network system that Figure 11 provides for the embodiment of the invention ten.Shown in figure 11; The present embodiment network system can comprise terminal 10 and gateway 20, and gateway 20 can be arranged in WSN, is used for managing each sensor node of WSN; Terminal 10 is the equipment in the IP network; And gateway 20 can be used as trunking, to set up sensor node and the data communication between the terminal in the IP network 10 among the WSN, wherein; Terminal 10 is used to send request of data IP packet, and the destination address in the request of data IP packet is the data type corresponding virtual IP address of the data of asking with the terminal; Gateway 20 is used to receive this request of data IP packet; According to the corresponding relation between virtual ip address, data type and the sensor node; Obtain the virtual ip address corresponding sensor node in the request of data IP packet; And be used for converting request of data IP packet to request of data WSN packet, the virtual ip address corresponding sensor node that is sent in the request of data IP packet obtains the data that sensor node is gathered with request; In addition, gateway 20 also can be used for receiving sensor node feedback data feedback WSN packet, after the packing data of the sensor node collection that request of data WSN packet is carried becomes the IP packet, sends to the terminal.
Gateway in the present embodiment can be the gateway that adopts the invention described above embodiment to provide, and its concrete structure can be referring to the explanation of the invention described above embodiment gateway, no longer does at this and gives unnecessary details.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of program command; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (16)
1. a data transmission method is characterized in that, comprising:
The request of data IP packet that receiving terminal sends, the destination address in the said request of data IP packet is the data type corresponding virtual IP address of the data of asking with the terminal;
According to the corresponding relation between virtual ip address, data type and the sensor node, obtain the virtual ip address corresponding sensor node in the said request of data IP packet;
Convert said request of data IP packet to request of data WSN packet, and said request of data WSN packet is sent to said sensor node, obtain the data that said sensor node is gathered with request.
2. data transmission method according to claim 1 is characterized in that, saidly converts said request of data IP packet to request of data WSN packet and comprises:
Convert said request of data IP packet to request of data WSN packet; And the virtual ip address corresponding data types in the said request of data IP packet is carried in the said request of data WSN packet, the virtual ip address corresponding data types in the said request of data IP packet is used to the data type of indicating needs to gather.
3. data transmission method according to claim 1 and 2 is characterized in that, carries terminal institute requested data in the said request of data IP packet;
Said according to the corresponding relation between virtual ip address, data type and the sensor node, the virtual ip address corresponding sensor node that obtains in the said request of data IP packet comprises:
According to the corresponding relation between virtual ip address, data type and the sensor node, obtain the virtual ip address corresponding data types in the said request of data IP packet;
Judge when the data type of carrying in virtual ip address corresponding data types and the said request of data IP packet in the said request of data IP packet is consistent; According to the corresponding relation between virtual ip address, data type and the sensor node, obtain the virtual ip address corresponding sensor node in the said request of data IP packet.
4. according to claim 1,2 or 3 described data transmission methods, it is characterized in that, also comprise:
Receive the data feedback WSN packet that said sensor node returns, said data feedback WSN packet comprises the data that said sensor node is gathered;
The data type corresponding virtual IP address of the data of gathering with said sensor node converts said data feedback WSN packet to data feedback IP packet as source address, sends to said terminal.
5. data transmission method according to claim 4; It is characterized in that; The data type corresponding virtual IP address of said data of gathering with sensor node converts said data feedback WSN packet to data feedback IP packet as source address, sends to said terminal and comprises:
The same data type corresponding virtual IP address of the data of gathering with a plurality of sensor nodes is as source address, and the packing data that said a plurality of sensor nodes are gathered sends to said terminal in a data feedback IP packet.
6. according to each described data transmission method in the claim 1 to 5, it is characterized in that, also comprise:
Monitoring said sensor node when inserting, is that said sensor node distributes the WSN address, and the data type of the data of said sensor acquisition is corresponding with the WSN address of said sensor node, the corresponding relation between acquisition sensor node and the data type.
7. according to each described data transmission method in the claim 1 to 6, it is characterized in that, saidly convert said request of data IP packet to request of data WSN packet, and said request of data WSN packet is sent to said sensor node comprises:
With the WSN address of current gateway as source address; With the WSN address of virtual ip address corresponding sensor node in the said request of data IP packet be destination address; Convert said request of data IP packet to request of data WSN packet, send to said sensor node.
8. according to each described data transmission method of claim 1 to 7, it is characterized in that, also comprise:
According to the data type of the requesting query data of wanting in the query requests IP packet of terminal transmission, be that the said data type of requesting query data of wanting is distributed virtual ip address, and set up the corresponding relation between data type and the virtual ip address;
To feed back to said terminal for the said virtual ip address of the data type distribution of requesting query data of wanting.
9. a gateway is characterized in that, comprising:
The request receiver module is used for the request of data IP packet that receiving terminal sends, and the destination address in the said request of data IP packet is the data type corresponding virtual IP address of the data of asking with the terminal;
The node acquisition module is used for according to the corresponding relation between virtual ip address, data type and the sensor node, obtains the virtual ip address corresponding sensor node in the said request of data IP packet;
Request sending module is used for converting said request of data IP packet to request of data WSN packet, and said request of data WSN packet is sent to said sensor node, obtains the data that said sensor node is gathered with request.
10. gateway according to claim 9 is characterized in that, the described request sending module comprises:
The packet converting unit; Be used for converting said request of data IP packet to request of data WSN packet; And the virtual ip address corresponding data types in the said request of data IP packet is carried in the said request of data WSN packet, the virtual ip address corresponding data types in the said request of data IP packet is used to the data type of indicating needs to gather;
Data transmission unit is used for said request of data WSN packet is sent to said sensor node, obtains the data that said sensor node is gathered with request.
11. according to claim 9 or 10 described gateways, it is characterized in that, carry the data type of terminal institute request msg in the said request of data IP packet;
Said node acquisition module comprises:
The data type acquiring unit is used for according to the corresponding relation between virtual ip address, data type and the sensor node, obtains the virtual ip address corresponding data types in the said request of data IP packet;
Whether the data type of carrying in the judging unit, the virtual ip address corresponding data types that is used for judging said request of data IP packet and said request of data IP packet is consistent;
The node acquiring unit; When the data type of carrying in the virtual ip address corresponding data types that is used for judging said request of data IP packet and the said request of data IP packet is consistent; According to the corresponding relation between virtual ip address, data type and the sensor node, obtain the virtual ip address corresponding sensor node in the said request of data IP packet.
12. according to claim 9,10 or 11 described gateways, it is characterized in that, also comprise:
Data reception module is used for the data feedback WSN packet that the receiving sensor node returns, and said data feedback WSN packet comprises the data that sensor node is gathered;
Data transmission blocks, the data type corresponding virtual IP address of the data that are used for gathering with sensor node converts said data feedback WSN packet to data feedback IP packet as source address, sends to said terminal.
13. gateway according to claim 12 is characterized in that:
Said data transmission blocks; The same data type corresponding virtual IP address of the data that specifically are used for gathering with a plurality of sensor nodes is as source address; In packing data Cheng Zaiyi the data feedback IP packet with said a plurality of sensor acquisition, send to said terminal.
14. according to each described gateway in the claim 9 to 13, it is characterized in that, also comprise:
Address assignment module; When being used to monitor transducer and connecing node and insert; Be that sensor node distributes the WSN address, and the data type of the data of said sensor acquisition is corresponding with the WSN address of said sensor node, the corresponding relation between acquisition sensor node and the data type.
15. according to each described gateway in the claim 9 to 14, it is characterized in that, also comprise:
The virtual ip address distribution module; Be used for wanting the data type of requesting query data according to the query requests IP packet that send at the terminal; For the said data type of requesting query data of wanting is distributed virtual ip address, and set up the corresponding relation between data type and the virtual ip address;
The virtual ip address feedback module is used for feeding back to said terminal for the said virtual ip address of the data type distribution of requesting query data of wanting.
16. a network system is characterized in that, comprises gateway and terminal, wherein:
Said terminal is used to send request of data IP packet, and the destination address in the said request of data IP packet is the data type corresponding virtual IP address of the data of asking with the terminal;
Said gateway; Be used for according to the corresponding relation between virtual ip address, data type and the sensor node; Obtain the virtual ip address corresponding sensor node in the said request of data IP packet; And be used for converting said request of data IP packet to request of data WSN packet, be sent to said sensor node and obtain the data that said sensor node is gathered with request.
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