CN101771632B - Cross-LAN system communication method - Google Patents
Cross-LAN system communication method Download PDFInfo
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- CN101771632B CN101771632B CN200810072528A CN200810072528A CN101771632B CN 101771632 B CN101771632 B CN 101771632B CN 200810072528 A CN200810072528 A CN 200810072528A CN 200810072528 A CN200810072528 A CN 200810072528A CN 101771632 B CN101771632 B CN 101771632B
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Abstract
The invention relates to a cross-LAN system communication method which solves the problems of low efficiency and poor security. The method comprises the following steps: A. each device dynamically establishes a local device routing table for itself by using the addressing agreement; B. each interworking gateway dynamically establishes a local device routing table and a remote device routing tablefor itself by using the addressing agreement; C. each device dynamically establishes a gateway routing table for itself by using the addressing agreement; D. a source device compiles a data agreementcontaining the identification code of the source device and the identification code and the data of a target device; and E. if the identification code of the target device is recorded in the local device routing table of the source device, the source device directly sends the data agreement to the target device; or F. if the identification code of the target device is recorded in the gateway routing table of the source device, the interworking gateway of the LAN receives the data agreement and sends the data agreement to the target device by using the remote device routing table through the interworking gateway of the LAN in which the target device is arranged.
Description
Technical field
The present invention relates to a kind of method of between a plurality of local area network (LAN)s, carrying out data communication through the Internet.
Background technology
Along with the professional expansion of network data processing, some catenet data handling systems often need be built the branch center to satisfy business demand in the strange land.How to realize between the different central server clusters that through the Internet efficient, convenient, safe strange land communication is the key of network data processing system.Prior art through the Internet, is set up the TCP link simply in twos between the central server of LAN; Obvious inefficiency, and Servers-all all need be exposed to public network, poor stability; In order to guarantee that data can reach, also need in the business datum of devices communicating agreement, add routing iinformation, these all bring very big inconvenience to exploitation.
Summary of the invention
The present invention aims to provide a kind of cross-LAN system communication method, can between LAN, carry out data communication safely, efficiently.
Technical scheme of the present invention is: a kind of cross-LAN system communication method comprises process that Interworking GateWay and equipment utilization addressing protocol in a plurality of local area network (LAN)s dynamically set up routing table and each equipment in a plurality of local area network (LAN) as the process of source device to target device transmission data protocol;
The step that process comprised that Interworking GateWay in a plurality of local area network (LAN)s and equipment utilization addressing protocol are dynamically set up routing table has:
Each equipment utilization addressing protocol in the steps A, each local area network (LAN) is dynamically set up the local device routing table that comprises the identification code of all in running order equipment in this local area network (LAN) for oneself; Embodiment comprises: each equipment in each local area network (LAN) has an own identification code through broadcasting in this local area network (LAN) type makes oneself entering operating state for the addressing protocol of " startup "; The equipment that respectively is in operating state in each local area network (LAN) receives that the type in this local area network (LAN) then adds the identification code of this starting device in the local device routing table of oneself to for the addressing protocol of " startups ", and the type that has the identification code of oneself to this LAN broadcast is the addressing protocol of " existence "; Starting device adds the identification code of the equipment that sends this addressing protocol in the own local device routing table to after receiving that the type of the device broadcasts that respectively is in operating state in this local area network (LAN) is the addressing protocol of " existence "; The type that each equipment in each local area network (LAN) has an own identification code through broadcasting in this local area network (LAN) is that the addressing protocol of " closing " makes the state of oneself deactivating; The equipment that respectively is in operating state in each local area network (LAN) receives that the type is then deleted the identification code of this closing device for the addressing protocol of " closing " in this local area network (LAN) from the local device routing table of oneself;
Step B, the Interworking GateWay in each local area network (LAN) utilize addressing protocol dynamically to set up the local device routing table that comprises the identification code of all in running order equipment in this local area network (LAN) and comprise the identification code of interior all the in running order equipment of other local area network (LAN) and act on behalf of the remote equipment routing table of TCP link information between Interworking GateWay and this Interworking GateWay of this equipment for own;
Step C, each the equipment utilization addressing protocol in each local area network (LAN) dynamically are the own gateway routing table of identification code of setting up the identification code that comprises interior all the in running order equipment of other local area network (LAN) and acting on behalf of the Interworking GateWay of this equipment;
Each equipment in a plurality of local area network (LAN)s transmits the step that the process of data protocol comprises as source device to target device has following listed step D and step e, perhaps step D and step F:
Step D, the source device establishment comprises the identification code of source device, the identification code of target device and the data protocol of data;
Step e, source device are checked the local device routing table of oneself, if write down the identification code of this target device in this local device routing table, then source device directly sends to target device with this data protocol;
Step F; Source device is checked the gateway routing table of oneself; If this gateway routing table has write down the identification code of this target device; Then source device sends to the Interworking GateWay of this local area network (LAN) with this data protocol, from the remote equipment routing table of oneself, extracts the TCP link information by this Interworking GateWay this data protocol is transmitted to the Interworking GateWay of target device place local area network (LAN), and the Interworking GateWay by target device place local area network (LAN) sends to target device with this data protocol again.
A kind of embodiment of said step B comprises: the Interworking GateWay in each local area network (LAN) is received the addressing protocol of the type of the identification code that has starting device in this local area network (LAN) for " startup "; Just in the local device routing table of oneself, add the identification code of this starting device, and be the addressing protocol of " startup " to Interworking GateWay broadcasting the type of other local area network (LAN); Interworking GateWay in each local area network (LAN) is received the addressing protocol of the type of the identification code that has closing device in this local area network (LAN) for " closing "; Just in the local device routing table of oneself, delete the identification code of this closing device, and broadcast the addressing protocol of the type for " closing " to the Interworking GateWay of other local area network (LAN); Interworking GateWay in each local area network (LAN) receives that the identity type that has starting device of the Interworking GateWay broadcasting of other local area network (LAN) is the addressing protocol of " startup ", just in the remote equipment routing table of oneself, adds the identification code of this starting device and acts on behalf of the Interworking GateWay of this starting device and the TCP link information between this Interworking GateWay; Interworking GateWay in each local area network (LAN) is received the addressing protocol of the type of the identification code that has closing device that the Interworking GateWay of other local area network (LAN) is broadcasted for " closing ", just from the remote equipment routing table of oneself, deletes the identification code of this closing device and acts on behalf of the Interworking GateWay of this closing device and the TCP link information between this Interworking GateWay.
A kind of embodiment of said step C comprises: the Interworking GateWay in each local area network (LAN) is received the addressing protocol of the type of the identification code that has starting device that the Interworking GateWay of other local area network (LAN) is broadcasted for " startup "; Just to this LAN broadcast have starting device identification code, close sign, the type of identification code of acting on behalf of the Interworking GateWay of this starting device is the addressing protocol of " gateway broadcasts ", the equipment that respectively is in operating state in this local area network (LAN) receives that the type is the addressing protocol identification code of this starting device of interpolation and act on behalf of the identification code of the Interworking GateWay of this starting device in the gateway routing table of oneself just of " gateway broadcasts "; Interworking GateWay in each local area network (LAN) is received the addressing protocol of the type of the identification code that has closing device that the Interworking GateWay of other local area network (LAN) is broadcasted for " closing "; Just to this LAN broadcast have closing device identification code, close sign, the type of identification code of acting on behalf of the Interworking GateWay of this closing device is the addressing protocol of " gateway broadcasts ", the equipment that respectively is in operating state in this local area network (LAN) receives that the type is that the addressing protocol of " gateway broadcasts " is just deleted the identification code of this closing device and acted on behalf of the identification code of the Interworking GateWay of this closing device in the gateway routing table of oneself.
And then; The present invention also comprises the processing of sending data protocol after inquiring about when not in running order target device is agreed to get into operating state: the step that each equipment said a plurality of local area network (LAN)s in comprises to the process of target device transmission data protocol as source device is D and step e in steps; Perhaps step D and step F; Perhaps step D and following listed step G, perhaps step D and following listed step H:
Step G, source device utilize addressing protocol query aim equipment in this local area network (LAN) whether can get into operating state; If target device is agreed to get into operating state, then source device just adds the identification code of target device in the local device routing table of oneself to, and directly this data protocol is sent to target device;
Step H, the Interworking GateWay of source device place local area network (LAN) utilizes addressing protocol whether can get into operating state to the Interworking GateWay query aim equipment of other local area network (LAN); If target device agrees to get into operating state; The Interworking GateWay of the source device place local area network (LAN) identification code of interpolation target device and act on behalf of TCP link information between Interworking GateWay and this Interworking GateWay of this equipment in the remote equipment routing table of oneself just then; Source device adds the identification code of target device according to the notice of the Interworking GateWay of this local area network (LAN) and acts on behalf of the identification code of the Interworking GateWay of this equipment, execution in step F then in the gateway routing table of oneself.
Cross-LAN system communication method of the present invention; Realize storage and forwarding of data through making up Interworking GateWay to a plurality of local internetwork device routes; Devices communicating between LAN is through the Interworking GateWay agency; Devices communicating between two local area network (LAN)s only needs set up a TCP link between Interworking GateWay separately, and need not improve link utilization at each equipment room link setup in twos.Except Interworking GateWay, it is inner that all devices all is in this local area network (LAN), guaranteed device security; Adopted the addressing protocol that separates fully with the data processing business to set up routing table simultaneously, let data protocol only need be absorbed in Business Processing, and needn't be concerned about Route Selection, thereby improved the efficient of data communication and be convenient to exploitation.
Description of drawings
Fig. 1 is for adopting a structural representation of striding the network data processing system embodiment of local area network (LAN) of the present invention.
Fig. 2 is the flow chart that interior Interworking GateWay of each local area network (LAN) of Fig. 1 network data processing system embodiment and equipment utilization addressing protocol are dynamically set up the routing table process.
Fig. 3 is each equipment in each local area network (LAN) of Fig. 1 network data processing system embodiment transmits the process of data protocol to target device as source device a flow chart.
Embodiment
One is adopted structure of striding the network data processing system embodiment of local area network (LAN) of the present invention, as shown in Figure 1.This network data processing system has three centers, and each center has the local area network (LAN) of oneself.Comprise device A 11, equipment B 12, equipment C 13, Interworking GateWay 14 in the local area network (LAN) at first center 10.Comprise equipment D 21, equipment E 22, equipment F 23, Interworking GateWay 24 in the local area network (LAN) at second center 20.Comprise equipment G 31, equipment H 32, equipment I 33, Interworking GateWay 34 in the local area network (LAN) at the 3rd center 30.
Communication protocol between system equipment is divided into data protocol and addressing protocol.Data protocol is additional data protocol header and puppy parc head before real business datum.Addressing protocol is additional addressing protocol head and puppy parc head before business datum.
The puppy parc head is in order to distinguish protocol type.The data receiver at first resolves the puppy parc head and obtains protocol type, according to protocol type data agreement and addressing protocol is handled respectively again.
The data structure of puppy parc head, as shown in table 1.
| Field description | Length | Implication |
| Protocol type | 1 | 1 expression data protocol, 2 expression addressing protocols |
| Leader is long | 4/8 | Puppy parc head length degree/2 |
| Keep | ? | ? |
| 4/8 | ? | ? |
Table 1
The data structure of data protocol head, as shown in table 2.
| Field description | Length (byte) | Implication |
| Verification with | 1 | The CRC check of whole Frame with |
| Leader is long | 4/8 | Data protocol head length degree/2 of high 4 bit value=reality |
| Option | 4/8 | Be convenient to expansion, fill with 0 |
| Purpose ID | 4 | 4 byte unique identifications of Data Receiving method, apparatus |
| Source ID | 4 | 4 byte unique identifications of data receiver equipment |
Table 2
The data structure of addressing protocol head, as shown in table 3.
| Field description | Length | Implication |
| Verification with | 1 | The CRC check of whole addressing frame with |
| Leader is long | 4/8 | Addressing protocol head length degree/2 of high 4 bit value=reality |
| Sign | 4/8 | 0x01 representes to ask 0x02 to represent to reply that other these equipment of equipment of 0x03 announcement have started other these equipment of equipment of 0x04 announcement has other this device shutdowns of equipment of 0x05 announcement 0x08 gateway broadcasts |
| Purpose ID | 4 | 4 byte unique identifications of Data Receiving method, apparatus |
| Source ID | 4 | 4 byte unique identifications of data receiver equipment |
Table 3
Can see from addressing protocol leader will field: the type branch " startup " of the addressing protocol LAN broadcast of this center (when this equipment gets into operating state to); " close " LAN broadcast of this center (when this equipment is deactivated state to); " existence " (responding the LAN broadcast of the equipment of " startup ") to this center by in running order equipment; " addressing request " (when the target device route is unreachable, broadcasting to the Interworking GateWay of other local area network (LAN) to the LAN broadcast at this center or by the Interworking GateWay of source device place local area network (LAN)) by source device; " addressing is replied " (sending to source device that sends " addressing request " or Interworking GateWay) by target device that is addressed or Interworking GateWay; " gateway broadcasts " (when receiving the addressing protocol that the local area network (LAN) Interworking GateWay at other center sends to this center LAN broadcast) by Interworking GateWay.
Among the present networks data handling system embodiment, interior each equipment of the local area network (LAN) at all centers is preserved respectively and is dynamically safeguarded anticipatory remark ground equipment routing table, and this table has been stored the identification code (device id) of equipment in running order in the local area network (LAN) at this center; The pass routing table of throwing the net, the identification code (Interworking GateWay ID) that this table has been stored the identification code (device id) of strange land equipment in running order in the local area network (LAN) at other center and acted on behalf of the Interworking GateWay of this equipment are preserved and dynamically safeguarded to each equipment respectively in the local area network (LAN) at all centers simultaneously.The interior Interworking GateWay of the local area network (LAN) at all centers is preserved respectively and is dynamically safeguarded an anticipatory remark central apparatus routing table, stores the identification code (device id) of equipment in running order in this center local area network (LAN); A remote equipment routing table is preserved and dynamically safeguarded to Interworking GateWay respectively in the local area network (LAN) at all centers simultaneously, and this table is stored the identification code (device id) of equipment in running order in the local area network (LAN) at other center and the TCP link information of setting up with the Interworking GateWay of this center local area network (LAN) thereof.The local area network (LAN) Interworking GateWay at each center exchanges the addressing protocol that each equipment sends in the local area network (LAN) at this center each other, and the Interworking GateWay that has received these addressing protocols upgrades the remote equipment routing table of oneself according to these addressing protocols.
The process that Interworking GateWay in each local area network (LAN) and equipment utilization addressing protocol are dynamically set up routing table is as shown in Figure 2.
Each equipment utilization addressing protocol in the step 101, each local area network (LAN) is dynamically set up the local device routing table that comprises the identification code of all in running order equipment in this local area network (LAN) for oneself.Execution in step 102.
Specifically, in this step: each equipment in each local area network (LAN) has an own identification code through broadcasting in this local area network (LAN) type makes oneself entering operating state for the addressing protocol of " startup "; The equipment that respectively is in operating state in each local area network (LAN) receives that the addressing protocol that the interior the type of this local area network (LAN) is " startup " then adds the identification code of this starting device in the local device routing table of oneself to, and sends the addressing protocol of the type of the identification code that has oneself for " existence " to this starting device; Starting device is received the type that the equipment that respectively is in operating state in this local area network (LAN) sends for behind the addressing protocol of " existences ", and the identification code of the equipment of this addressing protocol of transmission is added in the own local device routing table; The type that each equipment in each local area network (LAN) has an own identification code through broadcasting in this local area network (LAN) is that the addressing protocol of " closing " makes the state of oneself deactivating; The equipment that respectively is in operating state in each local area network (LAN) receives that the type is then deleted the identification code of this closing device for the addressing protocol of " closing " in this local area network (LAN) from the local device routing table of oneself.
Specifically; In this step: the Interworking GateWay in each local area network (LAN) is received the addressing protocol of the type of the identification code that has starting device in this local area network (LAN) for " startup "; Just in the local device routing table of oneself, add the identification code of this starting device, and be the addressing protocol of " startup " to Interworking GateWay broadcasting the type of other local area network (LAN); Interworking GateWay in each local area network (LAN) is received the addressing protocol of the type of the identification code that has closing device in this local area network (LAN) for " closing "; Just in the local device routing table of oneself, delete the identification code of this closing device, and broadcast the addressing protocol of the type for " closing " to the Interworking GateWay of other local area network (LAN); Interworking GateWay in each local area network (LAN) receives that the identity type that has starting device of the Interworking GateWay broadcasting of other local area network (LAN) is the addressing protocol of " startup ", just in the remote equipment routing table of oneself, adds the identification code of this starting device and acts on behalf of the Interworking GateWay of this starting device and the TCP link information between this Interworking GateWay; Interworking GateWay in each local area network (LAN) is received the addressing protocol of the type of the identification code that has closing device that the Interworking GateWay of other local area network (LAN) is broadcasted for " closing ", just from the remote equipment routing table of oneself, deletes the identification code of this closing device and acts on behalf of the Interworking GateWay of this closing device and the TCP link information between this Interworking GateWay.
Specifically; In this step: the Interworking GateWay in each local area network (LAN) is received the addressing protocol of the type of the identification code that has starting device that the Interworking GateWay of other local area network (LAN) is broadcasted for " startup "; Just to this LAN broadcast have starting device identification code, close sign, the type of identification code of acting on behalf of the Interworking GateWay of this starting device is the addressing protocol of " gateway broadcasts ", the equipment that respectively is in operating state in this local area network (LAN) receives that the type is the addressing protocol identification code of this starting device of interpolation and act on behalf of the identification code of the Interworking GateWay of this starting device in the gateway routing table of oneself just of " gateway broadcasts "; Interworking GateWay in each local area network (LAN) is received the addressing protocol of the type of the identification code that has closing device that the Interworking GateWay of other local area network (LAN) is broadcasted for " closing "; Just to this LAN broadcast have closing device identification code, close sign, the type of identification code of acting on behalf of the Interworking GateWay of this closing device is the addressing protocol of " gateway broadcasts ", the equipment that respectively is in operating state in this local area network (LAN) receives that the type is that the addressing protocol of " gateway broadcasts " is just deleted the identification code of this closing device and acted on behalf of the identification code of the Interworking GateWay of this closing device in the gateway routing table of oneself.
Combine Fig. 1 at present, explain that device A 11, equipment B 12, equipment C 13 and Interworking GateWay 14 in first center 10 utilizes addressing protocol dynamically to set up the process of separately local device routing table, gateway routing table, remote equipment routing table.
At first, equipment B 12 starts at first, and equipment B 12 promptly makes oneself entering operating state to the type that the LAN broadcast at first center 10 has an identification code of oneself for the addressing protocol of " startups ".At this moment, the miscellaneous equipment in this local area network (LAN) does not all respond to the addressing protocol of the type for " startup " from idle " closing " state.
Then, device A 11 starts, and the type that device A 11 promptly has an own identification code to the LAN broadcast at first center 10 makes oneself entering operating state for the addressing protocol of " startup ".At this moment; The equipment B 12 that has got into operating state in this local area network (LAN) receives that the type is the addressing protocol of " startup "; It is addressing protocol that equipment B 12 is judged this agreement according to the puppy parc head part of this addressing protocol, and then is " startup " from the type that the addressing protocol header parsing goes out this addressing protocol.Equipment B 12 is extracted transmit leg equipment from the addressing protocol head identification code (source ID) deposits the local device routing table of oneself in; The type that has an identification code of oneself to this LAN broadcast simultaneously is the addressing protocol of " existence ", and the type of answering equipment A 11 is the addressing protocol of " startup ".Device A 11 receives that equipment B 12 types are the addressing protocol of " existences ", passes through aforementioned dissection process, and the identification code of equipment B 12 is kept in the local device routing table of device A 11.
Then, equipment C 13 starts, and the type that equipment C 13 promptly has an own identification code to the LAN broadcast at first center 10 makes oneself entering operating state for the addressing protocol of " startup ".At this moment; The equipment B 12 that has got into operating state in this local area network (LAN) receives respectively that with device A 11 the type is the addressing protocol of " startup "; Equipment B 12 and device A 11 are extracted transmit leg equipment respectively from the addressing protocol head identification code (source ID) deposits the local device routing table of oneself in; Simultaneously equipment B 12 and device A 11 are the addressing protocol of " existence " to the type that this LAN broadcast has an own identification code respectively, and the type of answering equipment C 13 is the addressing protocol of " startup ".Equipment C 13 receives the addressing protocol of the type of equipment B 12 and device A 11 for " existence ", and through aforementioned dissection process, the identification code with equipment B 12 and device A 11 is kept in the local device routing table of equipment C 13 respectively.
Like this, device A 11, equipment B 12, equipment C 13 set up one separately and comprise the local device routing table that has got into the equipment of operating state in the local area network (LAN) at this center in the local area network (LAN) at first center 10.
For example, device A 11 type of in this local area network (LAN), broadcasting the identification code that has oneself makes the state of oneself deactivating for the addressing protocol of " closing ".Equipment B 12 in running order in the local area network (LAN) at first center 10 is received the addressing protocol of the type of device A 11 for " closing " with equipment C 13, then respectively the identification code of device A 11 is deleted from the local device routing table of oneself.
The local area network (LAN) Interworking GateWay 14 at first center 10; When the type of device A 11 or equipment B 12 or equipment C 13 broadcasting is the addressing protocol of " startup " in receiving this local area network (LAN); The identification code of this equipment is added in the local device routing table of oneself, the addressing protocol that also will identification code and the type of this Interworking GateWay 14 be " startup " is forwarded to the Interworking GateWay 24 at second center 20 and the Interworking GateWay 34 at the 3rd center 30.The local area network (LAN) Interworking GateWay 14 at first center 10; When the type of device A 11 or equipment B 12 or equipment B C 13 broadcasting is the addressing protocol of " closing " in receiving this local area network (LAN); The identification code of this equipment is deleted from the local device routing table of oneself, and the addressing protocol that also will identification code and the type of this Interworking GateWay 14 be " closing " is broadcast to the Interworking GateWay 24 at second center 20 and the Interworking GateWay 34 at the 3rd center 30.
If the type that equipment G 31 sends in the local area network (LAN) at second center 20 is the addressing protocol of " startup ", the addressing protocol that the Interworking GateWay 24 at second center 20 will be " startup " with identification code and this type of this Interworking GateWay 24 is forwarded to the Interworking GateWay 14 at first center 10 and the local area network (LAN) Interworking GateWay 34 at the 3rd center 30.
Interworking GateWay 14 in the local area network (LAN) at first center 10 is received the addressing protocol of the type of the identification code that comprises Interworking GateWay 24 that the Interworking GateWay 24 of the local area network (LAN) at second center 20 is broadcasted for " startup "; Just in the remote equipment routing table of oneself, add identification code and the Interworking GateWay 24 of equipment G 31 and the TCP link information of 14 of this Interworking GateWays, and to the LAN broadcast at first center 10 have the identification code of equipment G 31, the type that starts the identification code of sign, Interworking GateWay 24 is the addressing protocol of " gateway broadcasts ".Device A 11 or the equipment B 12 or the equipment C 13 that respectively are in operating state in the local area network (LAN) at first center 10 receive that the type is the addressing protocol of " gateway broadcasts "; Just the data division from this addressing protocol extracts the identification code that starts sign and Interworking GateWay 24; And from the addressing protocol head, extract the identification code of transmit leg equipment G 31, according to the identification code that starts sign interpolation equipment G 31 in oneself gateway routing table and the identification code of Interworking GateWay 24.
Then; If the type that equipment G 31 sends in the local area network (LAN) at second center 20 is the addressing protocol of " closing ", the Interworking GateWay 24 at second center 20 will be broadcast to the Interworking GateWay 14 at first center 10 and the local area network (LAN) Interworking GateWay 34 at the 3rd center 30 for the addressing protocol of " closing " with this type.
Interworking GateWay 14 in the local area network (LAN) at first center 10 receives that the type that the Interworking GateWay 24 of the local area network (LAN) at second center 20 is broadcasted is the addressing protocol of " closing "; The TCP link information of 14 of the identification code of sweep equipment G 31 and Interworking GateWay 24 and this Interworking GateWays in the remote equipment routing table of oneself just, and to the LAN broadcast at first center 10 have the identification code of equipment G31, the type of closing the identification code of sign, Interworking GateWay 24 is the addressing protocol of " gateway broadcasts ".Device A 11 or the equipment B 12 or the equipment C 13 that respectively are in operating state in the local area network (LAN) at first center 10 receive that the type is the addressing protocol of " gateway broadcasts "; Just the data division from this addressing protocol extracts the identification code of closing sign and Interworking GateWay 24; And from the addressing protocol head, extract the identification code of transmit leg equipment G 31, according to closing the identification code of sign sweep equipment G 31 in the gateway routing table of oneself and the identification code of Interworking GateWay 24.
According to same processing mode; Equipment D 21, equipment E 22 in the local area network (LAN) at second center 20, equipment F 23 can set up separately and dynamically safeguard own local device routing table and gateway routing table, and the Interworking GateWay 24 at second center 20 can be set up local device routing table and the remote equipment routing table with dynamically maintenance oneself.
In like manner; Equipment G 31, equipment H 32 in the local area network (LAN) at the 3rd center 30, equipment I 33 can be set up separately and dynamically safeguard own local device routing table and gateway routing table, and the Interworking GateWay 34 at the 3rd center 30 can be set up local device routing table and the remote equipment routing table with dynamically maintenance oneself.
Next three each interior equipment of local area network (LAN) just can transmit data protocol as source device to target device respectively.
Each equipment transmits the process of data protocol, meaning as shown in Figure 3 as source device to target device:
Step 200 gets into this flow process, execution in step 201.
Step 202, source device are checked the local device routing table of oneself, if write down the identification code of this target device in this local device routing table, then execution in step 203, otherwise change step 204.
Step 204, source device are checked the gateway routing table of oneself, if this gateway routing table has write down the identification code of this target device, then execution in step 205, otherwise change step 208.
Whether step 209, source device inspection have " addressing is replied " addressing protocol in this local area network (LAN) (being the source local area network (LAN)), are execution in step 210 then, otherwise change step 211.
Step 212, " addressing is replied " addressing protocol whether the Interworking GateWay inspection of source device place local area network (LAN) has the Interworking GateWay of other local area network (LAN) to send is execution in step 213 then, otherwise changes step 220.
Step 213; The Interworking GateWay of source device place local area network (LAN) (being the source local area network (LAN)) is by TCP link information between the source ID in should " addressing is replied " addressing protocol and the Interworking GateWay of transmitting the local area network (LAN) that is somebody's turn to do " addressing is replied " addressing protocol and this Interworking GateWay; TCP link information between the Interworking GateWay (promptly transmitting the Interworking GateWay of local area network (LAN) that should " addressing is replied " addressing protocol) that in the remote equipment routing table of oneself, adds this source ID (being the identification code of target device) and act on behalf of this equipment and this Interworking GateWay, and type of service will be somebody's turn to do the source ID (being the identification code of target device) in " addressing is replied " addressing protocol for the addressing protocol of " gateway broadcasts " and act on behalf of the identity code notification source device of the Interworking GateWay (i.e. the Interworking GateWay of the local area network (LAN) of " addressing is replied " addressing protocol is somebody's turn to do in forwarding) of this equipment.Source device adds the identification code of this target device according to the notice of the Interworking GateWay of this local area network (LAN) (being the source local area network (LAN)) and acts on behalf of the identification code of the Interworking GateWay of this equipment in the gateway routing table of oneself, execution in step 204 then.
Step 220 withdraws from.
Existing with regard to the process of equipment in the local area network (LAN) of same center to another equipment sending data, describe in conjunction with Fig. 1.Send data instance as source device to equipment B 12 (target device) with the device A 11 in first center 10:
At first, device A 11 establishments comprise the identification code of device A 11 (source device), the identification code of equipment B 12 (target device) and the data protocol of data.
Then, device A 11 is checked the local device routing table of oneself, if write down the identification code of equipment B 12 in this local device routing table, then device A 11 directly sends to equipment B 12 and this process of withdrawing from this data protocol.
Otherwise device A 11 is checked the gateway routing table of oneself, and whether checkout facility B 12 is in running order equipment in other center local area network (LAN).This gateway routing table surely not has the record of equipment B 12 identification codes; Device A 11 is just broadcasted " addressing request " addressing protocol of the identification code (Target id) that has equipment B 12 in the local area network (LAN) (being the source local area network (LAN)) at first center 10, whether can get into operating state with query facility B 12; If equipment B 12 is agreed to get into operating state, will respond " addressing is replied " addressing protocol that has this EIC equipment identification code (source ID).Whether device A 11 inspections have interior " addressing is replied " addressing protocol of local area network (LAN) at first center 10; Be that then device A 11 is added the source ID in " addressing is replied " addressing protocol (being the identification code of equipment B 12) in the local device routing table of oneself to, and directly this data protocol sent to equipment B 12 and withdraw from.
Otherwise; Send this by the Interworking GateWay 14 of first center, 10 local area network (LAN)s (being the source local area network (LAN)) to the Interworking GateWay 34 of the Interworking GateWay 24 of second center, 20 local area network (LAN)s and three-core 30 local area network (LAN)s and have " addressing request " addressing protocol of equipment B 12 identification codes (Target id), whether query facility B 12 can get into operating state.After the Interworking GateWay 24 of second center, 20 local area network (LAN)s and the Interworking GateWay 34 of three-core 30 local area network (LAN)s were received this " addressing request " addressing protocol, broadcasting should " addressing request " addressing protocol in this local area network (LAN) respectively.Because equipment B 12 does not belong to second center, 20 local area network (LAN)s and three-core 30 local area network (LAN)s, the Interworking GateWay 24 of certain second center 20 local area network (LAN)s and the Interworking GateWay 34 of three-core 30 local area network (LAN)s can not receive that or not any of equipment B 12 replys; The Interworking GateWay 24 of second center, 20 local area network (LAN)s and the Interworking GateWay 34 of three-core 30 local area network (LAN)s also just have no way of transmitting " addressing is replied " addressing protocol of replying this " addressing request " addressing protocol.The Interworking GateWay 14 of first center, 10 local area network (LAN)s can not get " addressing is replied " addressing protocol that the Interworking GateWay 34 of Interworking GateWay 24 or three-core 30 local area network (LAN)s of second center, 20 local area network (LAN)s is sent, and just releases this process.
With regard to the process of the equipment sending data of the equipment in the center local area network (LAN) in another center local area network (LAN), describe again in conjunction with Fig. 1.Is example with the Interworking GateWay 24 of the device A 11 in first center 10 through Interworking GateWay 14 and second center, 20 local area network (LAN)s to the process that equipment G 31 sends data:
At first, device A 11 establishments comprise the identification code (source ID) of device A 11, the identification code (Target id) of equipment G 31 and the data protocol of data.
Then, device A 11 is checked the local device routing table of oneself, obviously, if there is not the record of equipment G 31 identification codes in this local device routing table.Then; Device A 11 is checked the gateway routing table of oneself; If this gateway routing table has write down the identification code of equipment G 31; Then device A 11 sends to the Interworking GateWay 14 of first center, 10 local area network (LAN)s with this data protocol, from the remote equipment routing table of oneself, extracts the TCP link information by Interworking GateWay 14, this data protocol is transmitted to the Interworking GateWay 24 of second center, 20 local area network (LAN)s.The Interworking GateWay 24 of second center, 20 local area network (LAN)s sends to equipment G 31 with this data protocol again, withdraws from this process afterwards.
Otherwise device A 11 is broadcasted " addressing request " addressing protocol of the identification code that has equipment G 31 in the local area network (LAN) (being the source local area network (LAN)) at first center 10, whether can get into operating state with query facility G 31; Because equipment G 31 does not belong to the local area network (LAN) at first center 10, device A 11 can not receive that or not any of equipment G 31 replys certainly; Whether device A 11 inspections have interior " addressing is replied " addressing protocol of local area network (LAN) at first center 10, can not obtain corresponding " addressing is replied " addressing protocol naturally.So; Interworking GateWay 14 by first center, 10 local area network (LAN)s sends " addressing request " addressing protocol that has equipment G 31 identification codes to the Interworking GateWay 24 of second center, 20 local area network (LAN)s and the Interworking GateWay 34 of three-core 30 local area network (LAN)s, and whether query facility G 31 can get into operating state.After the Interworking GateWay 24 of second center, 20 local area network (LAN)s and the Interworking GateWay 34 of three-core 30 local area network (LAN)s were received this " addressing request " addressing protocol, broadcasting should " addressing request " addressing protocol in this local area network (LAN) respectively.Because equipment G 31 belongs to second center, 20 local area network (LAN)s,, do not have this EIC equipment identification code " addressing is replied " addressing protocol with regard to not responding if equipment G 31 disagrees with the entering operating state.The Interworking GateWay 24 of second center, 20 local area network (LAN)s can not receive replying of equipment G 31 and does not just do any processing.The Interworking GateWay 14 of first center, 10 local area network (LAN)s can not get " addressing is replied " addressing protocol that the Interworking GateWay 24 of second center, 20 local area network (LAN)s is sent, and just withdraws from this process.
If equipment G 31 agrees to get into operating state, will respond " addressing is replied " addressing protocol that has this EIC equipment identification code.The Interworking GateWay 24 of second center, 20 local area network (LAN)s receive equipment G 31 this reply that just transmit should " addressing is replied " addressing protocol.The Interworking GateWay 14 of first center, 10 local area network (LAN)s obtains " addressing is replied " addressing protocol that the Interworking GateWay 24 of second center, 20 local area network (LAN)s is sent; Just by TCP link information between the source ID (identification code of equipment G 31) in should " addressing is replied " addressing protocol and the Interworking GateWay (Interworking GateWays 24 of second center, 20 local area network (LAN)s) of transmitting local area network (LAN) that should " addressing is replied " addressing protocol and this Interworking GateWay, the identification code of interpolation equipment G 31 in the remote equipment routing table of oneself) and the Interworking GateWay 24 of second center, 20 local area network (LAN)s of agent equipment G 31 and this Interworking GateWay between the TCP link information.The identification code that Interworking GateWay 14 types of service of first center, 10 local area network (LAN)s will be somebody's turn to do the equipment G 31 in " addressing is replied " addressing protocol for the addressing protocol of " gateway broadcasts ") and the identity code notification device A 11 of the Interworking GateWay 24 of second center, 20 local area network (LAN)s of agent equipment G31.Device A 11 is added the identification code of Interworking GateWay 14 of first center, 10 local area network (LAN)s of identification code and the agent equipment G 31 of this equipment G 31 in the gateway routing table of oneself according to the notice of the Interworking GateWay 14 of first center, 10 local area network (LAN)s.When device A 11 is checked the gateway routing table of oneself more then, write down the identification code of equipment G 31 in this gateway routing table.Device A 11 sends to the Interworking GateWay 14 of first center, 10 local area network (LAN)s with this data protocol, from the remote equipment routing table of oneself, extracts the TCP link information by Interworking GateWay 14, this data protocol is transmitted to the Interworking GateWay 24 of second center, 20 local area network (LAN)s.The Interworking GateWay 24 of second center, 20 local area network (LAN)s sends to equipment G 31 with this data protocol again, withdraws from this process afterwards.
The above is merely preferred embodiment of the present invention, does not limit the scope that the present invention implements with this, and the equivalence of doing according to technical scheme of the present invention and description changes and modification, all should belong to the scope that the present invention is contained.
Claims (4)
1. cross-LAN system communication method comprises process that Interworking GateWay and equipment utilization addressing protocol in a plurality of local area network (LAN)s dynamically set up routing table and each equipment in a plurality of local area network (LAN) as the process of source device to target device transmission data protocol;
The step that process comprised that Interworking GateWay in a plurality of local area network (LAN)s and equipment utilization addressing protocol are dynamically set up routing table has:
Each equipment utilization addressing protocol in the steps A, each local area network (LAN) is dynamically set up the local device routing table that comprises the identification code of all in running order equipment in this local area network (LAN) for oneself; Embodiment comprises: each equipment in each local area network (LAN) has an own identification code through broadcasting in this local area network (LAN) type makes oneself entering operating state for the addressing protocol of " startup "; The equipment that respectively is in operating state in each local area network (LAN) receives that the type in this local area network (LAN) then adds the identification code of this starting device in the local device routing table of oneself to for the addressing protocol of " startups ", and the type that has the identification code of oneself to this LAN broadcast is the addressing protocol of " existence "; Starting device adds the identification code of the equipment that sends this addressing protocol in the own local device routing table to after receiving that the type of the device broadcasts that respectively is in operating state in this local area network (LAN) is the addressing protocol of " existence "; The type that each equipment in each local area network (LAN) has an own identification code through broadcasting in this local area network (LAN) is that the addressing protocol of " closing " makes the state of oneself deactivating; The equipment that respectively is in operating state in each local area network (LAN) receives that the type is then deleted the identification code of this closing device for the addressing protocol of " closing " in this local area network (LAN) from the local device routing table of oneself;
Step B, the Interworking GateWay in each local area network (LAN) utilize addressing protocol dynamically to set up the local device routing table that comprises the identification code of all in running order equipment in this local area network (LAN) and comprise the identification code of interior all the in running order equipment of other local area network (LAN) and act on behalf of the remote equipment routing table of TCP link information between Interworking GateWay and this Interworking GateWay of this equipment for own;
Step C, each the equipment utilization addressing protocol in each local area network (LAN) dynamically are the own gateway routing table of identification code of setting up the identification code that comprises interior all the in running order equipment of other local area network (LAN) and acting on behalf of the Interworking GateWay of this equipment;
Each equipment in a plurality of local area network (LAN)s transmits the step that the process of data protocol comprises as source device to target device has following listed step D and step e, perhaps step D and step F:
Step D, the source device establishment comprises the identification code of source device, the identification code of target device and the data protocol of data;
Step e, source device are checked the local device routing table of oneself, if write down the identification code of this target device in this local device routing table, then source device directly sends to target device with this data protocol;
Step F; Source device is checked the gateway routing table of oneself; If this gateway routing table has write down the identification code of this target device; Then source device sends to the Interworking GateWay of this local area network (LAN) with this data protocol, from the remote equipment routing table of oneself, extracts the TCP link information by this Interworking GateWay this data protocol is transmitted to the Interworking GateWay of target device place local area network (LAN), and the Interworking GateWay by target device place local area network (LAN) sends to target device with this data protocol again.
2. a kind of cross-LAN system communication method according to claim 1; It is characterized in that: a kind of embodiment of said step B comprises: the Interworking GateWay in each local area network (LAN) is received the addressing protocol of the type of the identification code that has starting device in this local area network (LAN) for " startup "; Just in the local device routing table of oneself, add the identification code of this starting device, and be the addressing protocol of " startup " to Interworking GateWay broadcasting the type of other local area network (LAN); Interworking GateWay in each local area network (LAN) is received the addressing protocol of the type of the identification code that has closing device in this local area network (LAN) for " closing "; Just in the local device routing table of oneself, delete the identification code of this closing device, and broadcast the addressing protocol of the type for " closing " to the Interworking GateWay of other local area network (LAN); Interworking GateWay in each local area network (LAN) receives that the identity type that has starting device of the Interworking GateWay broadcasting of other local area network (LAN) is the addressing protocol of " startup ", just in the remote equipment routing table of oneself, adds the identification code of this starting device and acts on behalf of the Interworking GateWay of this starting device and the TCP link information between this Interworking GateWay; Interworking GateWay in each local area network (LAN) is received the addressing protocol of the type of the identification code that has closing device that the Interworking GateWay of other local area network (LAN) is broadcasted for " closing ", just from the remote equipment routing table of oneself, deletes the identification code of this closing device and acts on behalf of the Interworking GateWay of this closing device and the TCP link information between this Interworking GateWay.
3. a kind of cross-LAN system communication method according to claim 2; It is characterized in that: a kind of embodiment of said step C comprises: the Interworking GateWay in each local area network (LAN) is received the addressing protocol of the type of the identification code that has starting device that the Interworking GateWay of other local area network (LAN) is broadcasted for " startup "; Just to this LAN broadcast have starting device identification code, close sign, the type of identification code of acting on behalf of the Interworking GateWay of this starting device is the addressing protocol of " gateway broadcasts ", the equipment that respectively is in operating state in this local area network (LAN) receives that the type is the addressing protocol identification code of this starting device of interpolation and act on behalf of the identification code of the Interworking GateWay of this starting device in the gateway routing table of oneself just of " gateway broadcasts "; Interworking GateWay in each local area network (LAN) is received the addressing protocol of the type of the identification code that has closing device that the Interworking GateWay of other local area network (LAN) is broadcasted for " closing "; Just to this LAN broadcast have closing device identification code, close sign, the type of identification code of acting on behalf of the Interworking GateWay of this closing device is the addressing protocol of " gateway broadcasts ", the equipment that respectively is in operating state in this local area network (LAN) receives that the type is that the addressing protocol of " gateway broadcasts " is just deleted the identification code of this closing device and acted on behalf of the identification code of the Interworking GateWay of this closing device in the gateway routing table of oneself.
4. according to claim 1 or 2 or 3 described a kind of cross-LAN system communication method; It is characterized in that: each equipment in said a plurality of local area network (LAN)s transmits step that the process of data protocol comprises D and step e in steps as source device to target device; Perhaps step D and step F; Perhaps step D and following listed step G, perhaps step D and following listed step H:
Step G, source device utilize addressing protocol query aim equipment in this local area network (LAN) whether can get into operating state; If target device is agreed to get into operating state, then source device just adds the identification code of target device in the local device routing table of oneself to, and directly this data protocol is sent to target device;
Step H, the Interworking GateWay of source device place local area network (LAN) utilizes addressing protocol whether can get into operating state to the Interworking GateWay query aim equipment of other local area network (LAN); If target device agrees to get into operating state; The Interworking GateWay of the source device place local area network (LAN) identification code of interpolation target device and act on behalf of TCP link information between Interworking GateWay and this Interworking GateWay of this equipment in the remote equipment routing table of oneself just then; Source device adds the identification code of target device according to the notice of the Interworking GateWay of this local area network (LAN) and acts on behalf of the identification code of the Interworking GateWay of this equipment, execution in step F then in the gateway routing table of oneself.
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| WO2014086023A1 (en) | 2012-12-06 | 2014-06-12 | 华为技术有限公司 | Method, device and data center network for cross-service zone communication |
| CN103327020A (en) * | 2013-06-19 | 2013-09-25 | 国家电网公司 | Security access method and system based on region dividing |
| CN106506490B (en) * | 2016-11-03 | 2019-07-09 | 深圳智高点知识产权运营有限公司 | A kind of distributed computing control method and distributed computing system |
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