CN101651706A - Method, system and device for sending and receiving data - Google Patents
Method, system and device for sending and receiving data Download PDFInfo
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- CN101651706A CN101651706A CN200810146268A CN200810146268A CN101651706A CN 101651706 A CN101651706 A CN 101651706A CN 200810146268 A CN200810146268 A CN 200810146268A CN 200810146268 A CN200810146268 A CN 200810146268A CN 101651706 A CN101651706 A CN 101651706A
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Abstract
The embodiment of the invention discloses a data receiving and sending method for realizing the high availability of a transmission control protocol TCP HA, a corresponding system and a correspondingdevice. The data receiving method comprises the following steps: a mainboard and a standby board receive data sent by a TCP communication terminal; the mainboard processes the data; after processing is finished, the mainboard sends a real-time back-up message corresponding to the data to the standby board; and the standby board receives the real-time back-up message. The embodiment of the invention also provides a data transmission system and a data transmission device. The embodiment of the invention can reduce consumption of communication bandwidth between the mainboard and the standby boardeffectively, and reduces the quantity of packet loss which needs to be retransmitted while improving the reliability of data transmission.
Description
Technical field
The present invention relates to communication technical field, be specifically related to a kind of data method of sending and receiving and system and device.
Background technology
Transmission control protocol (TCP, Transfer Control Protocol) is the transport layer protocol in the ICP/IP protocol stack, and it is confirmed by sequence and the bag retransmission mechanism, provides reliable data flow to send and arrive the virtual Connection Service of application program.
Realize TCP high reliability (HA in the prior art, High Availability) is spare main plate (SMB by the TCP communication ends, Standby Main Board, hereinafter to be referred as: slave board) to Active Main Board (AMB, Active Main Board, hereinafter to be referred as: mainboard) realize in the monitoring of data transmit-receive direction and the information interaction between mainboard and the slave board.Concrete implementation method is as described below: the TCP communication ends is when receiving data, ply-yarn drill (LC, Line Card) can be according to the session case of TCP communication ends, the data that receive are sent to mainboard through slave board, slave board can carry out buffer memory with the data of passing through in this process, described mainboard is handled receiving data, to handle the back data and send to ply-yarn drill through slave board again, and return to the opposite end by ply-yarn drill, when data were through slave board after processing, slave board can be according to the described data deletion of handling the back data with the previous status of buffer memory; The same TCP communication ends data that mainboard sends when sending data will send to ply-yarn drill through slave board, send to the opposite end by ply-yarn drill again, and the data of transmission are through slave board the time, and slave board can the described data of buffer memory.When mainboard broke down, slave board carried out work for original mainboard, and communicating to connect of TCP can not be interrupted, and realizes the high reliability of the transfer of data of TCP with this.
There are following problem in the Data Receiving and the transmission of existing TCP high reliability: in the prior art, slave board adopts data real time backup one by one, transceive data need realize by the message transmission between the active and standby plate, the synchronous regime expense forms linear relationship with flow on TCP is connected between mainboard and the slave board, consumes the communication between plates bandwidth;
Ply-yarn drill is only with mainboard or only have data flow to be connected with slave board in the prior art, therefore need the data flow handover mechanism on the ply-yarn drill, for example ply-yarn drill only has data flow to be connected with mainboard, then when mainboard breaks down, ply-yarn drill need switch to slave board with data flow, because handoff procedure can take the regular hour, so reduced the real-time of system.
Summary of the invention
The embodiment of the invention provides a kind of data method of sending and receiving and system and device, can improve the performance of transfer of data between active and standby plate.
The data receive method that the embodiment of the invention provides comprises: the data that mainboard and slave board received communication end send; Mainboard is handled described data; After disposing, mainboard is equipped with message to the reality that slave board sends described data correspondence; Slave board receives described reality and is equipped with message.
The data transmission method for uplink that the embodiment of the invention provides comprises: mainboard obtains data to be sent, stores described data; Mainboard sends described data to be sent to slave board; Slave board identifies to the mainboard feedback data according to the data that mainboard sends; When slave board received described data, mainboard sent described data according to the storage order of data.
The data transmission system that the embodiment of the invention provides comprises mainboard and slave board, and described mainboard is used for, and the data that the received communication end sends by the multicast mode are handled described data, and the back that disposes is equipped with message to the reality that slave board sends described data correspondence; Described slave board is used for, and the reality that receives the mainboard transmission is equipped with message.
The data transmission system that the embodiment of the invention provides comprises mainboard and slave board, and described mainboard is used for, obtain data to be sent, store described data, send described data to be sent to slave board, when definite slave board has received described data, send described data; Described slave board is used for, and whether the data that send according to mainboard receive described data to mainboard feedback data sign with the indication slave board.
The mainboard that the embodiment of the invention provides comprises: mainboard controll block, be used for the data that the received communication end sends, and described data are sent to the mainboard protocol stack, will deposit buffering area in from the data of mainboard protocol stack and send; The mainboard protocol stack, the data that are used for receiving from mainboard controll block are sent to the mainboard application module, and the data that the mainboard application module is produced are sent to mainboard controll block; The mainboard application module is used for the data that the mainboard protocol stack that receives sends are handled obtaining result, sends the reality that comprises described result to slave board and is equipped with message, produces data to be sent, and described data to be sent are sent to the mainboard protocol stack.
The slave board that the embodiment of the invention provides comprises: slave board controll block, be used for the data that the received communication end sends, and described data are sent to the slave board protocol stack; The slave board application module is used to receive the reality that mainboard sends and is equipped with message, is equipped with the data that message is determined the needs deletion according to described reality, and sends deletion message to the slave board protocol stack; The slave board protocol stack is used for depositing the data that slave board controll block sends in buffering area, deletes corresponding data according to the deletion message that the slave board application module sends in buffering area.
In the embodiment of the invention, because the data that mainboard and slave board received communication end send, so mainboard can only send to slave board the reality after the data processing is equipped with message, and do not need again and transmission data itself between the slave board, promptly message is backed up in realtime one by one, thereby has reduced the consumption of active and standby plate communication between plates bandwidth;
Secondly, because in the embodiment of the invention, mainboard and slave board receive data from communication ends simultaneously, therefore be different from unicast data stream of the prior art, so when mainboard broke down, the data that slave board can directly utilize communication ends to send were taken over the work of mainboard, thereby have improved the real-time of system.
Description of drawings
Fig. 1 is the schematic diagram of an embodiment of a kind of data receive method of the present invention;
Fig. 2 is the schematic diagram of another embodiment of a kind of data receive method of the present invention;
Fig. 3 is the schematic diagram of an embodiment of a kind of data transmission method for uplink of the present invention;
Fig. 4 is the structure chart of an embodiment of the system of a kind of transceive data of the present invention;
Fig. 5 is the structure chart of an embodiment of the mainboard of a kind of transceive data of the present invention;
Fig. 6 is the structure chart of an embodiment of the slave board of a kind of transceive data of the present invention.
Embodiment
The embodiment of the invention provides a kind of data method of sending and receiving of the TCP of realization high reliability, and the embodiment of the invention also provides corresponding system.Below be elaborated respectively.
See also Fig. 1, be the schematic diagram of an embodiment of a kind of data receive method of the present invention.Describe with the example of the message in the TCP communication mode in the present embodiment, be understandable that, in actual applications as data, except message mode, can also adopt other similar data forms, packet for example, Frame etc., concrete mode does not limit herein.
The ply-yarn drill of 101:TCP communication ends multicasts to mainboard and slave board with the message that far-end sends.
Ply-yarn drill sends to the TCP controll block of mainboard and the TCP controll block of slave board simultaneously with the message of far-end, and active and standby plate is asynchronous to the processing of message, when slave board is reached the standard grade or is rolled off the production line when state variation takes place, message flow can it goes without doing state switches.
Need to prove, be that example describes with the multicast in the present embodiment, be understandable that, and in actual applications, can also be other similar modes equally except multicast, for example broadcasting etc. is as long as can make data mail to mainboard and slave board simultaneously.
In the embodiment of the invention, active and standby plate need be carried out state synchronized, active and standby like this plate is the message of receiving group simultaneously, then before step 101, should have active and standby plate synchronous and with the far-end connection procedure, can adopt for example following several steps:
A: mainboard and slave board carry out state synchronized, the Guarantee Status unanimity, and related data structures is consistent.
The state synchronized that is appreciated that active and standby plate is that the protocol stack to active and standby plate carries out synchronously.
Mainly comprise two aspects synchronously for data structure, one is to be used to represent that the data structure of buffer state (is included in corresponding reception buffering area field and the transmission buffering area field of expansion simultaneously on the active and standby plate) synchronously, another is that to be used for the data structure that communication port sets up synchronous, is introduced respectively below:
Data structure for the expression buffer state is synchronous:
In the present embodiment, by the state of the TCP controll block of active and standby plate is done suitable expansion, make the activestandby state on a plate, to preserve TCP message in the buffer area that TCP connects simultaneously, on main basis with buffer area TCP message status, expand standby buffer area TCP message status, have only when two state consistencies, the TCP message of buffer memory is just effective.Therefore at first the TCP controll block of active and standby plate to be carried out state synchronized, can in the field of the state parameter of the TCP of existing active and standby plate controll block, expand the snd_nxt_b field, concrete extended mode can be to choose a reserved field as the snd_nxt_b field in the original reserved field of the state parameter of TCP controll block, is respectively applied for the state that sends buffering area TCP message on the active and standby plate of expression; And expanding rcv_nxt_b respectively, concrete extended mode and above-mentioned extended mode are similar, are respectively applied for the state that receives buffering area TCP message on the active and standby plate of expression.
As: when carrying out the state synchronized of active and standby plate, can on slave board, move the test serial number synchronous task, and the tcp state information snd_nxt_b or the rcv_nxt_b of slave board carried out to mainboard synchronously.
Synchronous for the data structure that communication port is set up:
Mainboard protocol stack and slave board protocol stack are created the socket data structure, so that set up the socket interface that active and standby plate is communicated by letter with far-end.
The application module of mainboard calls socket socket of socket function creation, and with the back up in realtime application module of slave board of this information.Simultaneously, mainboard protocol stack and slave board protocol stack are created corresponding socket data structure.
B: mainboard, slave board foundation are connected with far-end.
If the communication ends of TCP is a client, mainboard is set up and being connected of far-end by the calling interface contiguous function, and is the socket interface, the slave board of simultaneously the connection behavior being backed up in realtime.The message of far-end to mainboard and slave board, for slave board, after standby buffer area possesses the condition of successful connection, is reached the mainboard buffer area with the rcv_nxt_b test serial number by synchronous task by multicast, and the successful connection of mainboard buffer area is back to the application module of slave board.The serial number information of the TCP message of transmission can be at the application module of mainboard and the application module buffer memory of slave board.
If the communication ends of TCP is a service end, far-end is (SYN synchronously, Synchronize) message can be by multicast to mainboard and slave board, the synchronous task that on slave board, moves with the state of the SYN message of standby buffer area as: sequence number is carried out synchronously with buffer area to main, and the application module of slave board receives a new connection then.The application module of mainboard will receive the new behavior that connects and back up in realtime to the application module of slave board, and the application module of slave board is equally also accepted new a connection, and same TCP test serial number information can be at the application module buffer memory.
102: slave board sends tcp state information to mainboard.
On slave board with the TCP test serial number (rcv_nxt_b) received and can send TCP test serial number (snd_nxt_b) and carry out in real time or timed backup to mainboard.After mainboard and slave board receive the message of ply-yarn drill multicast, active and standby plate upgrades the reception test serial number simultaneously, different is that mainboard upgrades rcv_nxt, this rcv_nxt is meant the TCP test serial number that mainboard receives, slave board upgrades rcv_nxt_b, it is the received TCP test serial number of slave board, TCP test serial number (rcv_nxt_b) after slave board will upgrade sends to mainboard, having described mainboard and slave board in step 101, to carry out data structure synchronous, and then the numerical value of the mainboard rcv_nxt_b that slave board can be sent is inserted in the rcv_nxt_b field that expands in the TCP controll block state parameter of mainboard.
103: the tcp state information of mainboard record mainboard and slave board.
Need to prove that step 103 is an optional step, the tcp state information of mainboard record mainboard and slave board can check that be understandable that, in the present embodiment, mainboard can not stored the TCP message information equally for follow-up management person herein.
104: mainboard sends the real message that is equipped with to slave board after doing respective handling according to the TCP message that receives.
Mainboard receives the application module of being delivered mainboard behind the message by the mainboard protocol stack, (this processing can be the specified processing mode of user and the application module of mainboard is handled the TCP message, for example message encapsulation, or packet parsing, or message fractionation etc.) after, the reality that mainboard will comprise result (result that obtains after promptly the TCP message being handled) is equipped with message and is sent to slave board.
Mainboard is deleted the TCP message of this result correspondence from buffering area after processing obtains real message fully.
The reality that the application module of slave board receives the mainboard transmission is equipped with after the message, can know that mainboard finished the processing to this TCP message, then slave board keeps this reality and is equipped with result in the message, because this TCP message is finished dealing with, then the slave board result that can be comprised from real message adopts this result of reckoning function calculation that presets from which TCP message to handle to obtain, then the corresponding TCP message of deletion and the application module that the TCP message need not be submitted to slave board is handled from buffering area.
Need to prove, slave board adopt to calculate function determine the TCP message process can for: suppose that the operation that this mainboard and slave board carry out is the message encapsulation, then when system constructing, all can preset identical encapsulation and decapsulation strategy on mainboard and the slave board, therefore, when encapsulating the TCP message, mainboard obtains encapsulated message (being result), afterwards, this encapsulated message is sent to after the slave board, slave board can carry out decapsulation to this encapsulated message according to the decapsulation strategy and restore original TCP message, and the sign of obtaining this TCP message is to determine TCP message corresponding in the slave board buffering area, be understandable that, only describe, in actual applications herein with an example, can also be that other similarly calculate the function mode equally, not limit herein.
In the present embodiment, real being equipped with in the message, include result, and this result is meant handles the legitimate reading that obtains afterwards to data, is understandable that, this reality is equipped with in the message can include only the indication that disposes equally, and this indication is used for representing that the corresponding TCP message of mainboard disposes.
When slave board need be preserved the result of mainboard, then mainboard is equipped with in the reality of issuing slave board and needs to include result in the message, when slave board did not need to preserve the result of mainboard, then mainboard was equipped with in the reality of issuing slave board and can only comprises this indication that disposes in the message.
In the present embodiment, slave board is receiving after reality that mainboard sends is equipped with message, and according to this real slave board TCP message status information that is equipped with information updating self, and the slave board TCP message status information after will upgrading is sent to mainboard, stored by mainboard.
In the present embodiment, because mainboard and slave board receive the TCP message by multicast mode, so slave board need not to send the TCP message that receives to mainboard, and promptly message is backed up in realtime one by one, thereby has reduced the consumption of communication between plates bandwidth;
Secondly, in the present embodiment, slave board is after the reality that receives the mainboard transmission is equipped with message, read out result the message fully from this reality, and adopt the TCP message of this result correspondence of reckoning function calculation preset, and from the slave board buffering area this TCP message of deletion, therefore need not mainboard specifically needs TCP message from deletion to the indication of slave board transmission information, thereby further reduced the consumption of communication between plates bandwidth
Need to prove, in the present embodiment, because mainboard and slave board have adopted multicast mode to receive the TCP message, therefore, slave board TCP message status information after slave board can will upgrade after the reality that receives the mainboard transmission is equipped with message again is sent to mainboard, thereby make the data of preserving in the mainboard separate with state, by content described above as can be known, expansion has the TCP message status of mainboard and the TCP message status of slave board, the data of preserving in the mainboard to separate with state to be meant the content of the TCP message preserved in the mainboard and its " the TCP message status of slave board " can be temporarily inconsistent on the mainboard.
Slave board just can be sent to mainboard with the slave board TCP message status after upgrading after receiving real message fully; therefore can realize the centralized backup of TCP message status; also can realize the different backup modes of service with different priority levels; for example for the business of high priority; real-time for the Guarantee Status backup; can after the complete plate TCP message status of the each renewal of slave board, just in time this state be informed mainboard; business for lower priority; for reducing the number of times of active and standby communication between plates; can be after slave board upgrades several slave boards TCP message status; concentrate again these slave boards TCP message status is sent to mainboard; therefore the embodiment of the invention can be formulated the backup protection grade at the business of different priorities effectively, thereby improves the flexibility of backup.
See also Fig. 2, be the schematic diagram of a kind of another embodiment of data receive method of the present invention.Be received as example with message in the present embodiment and describe, with the embodiment one different steps 204 that are.
201: ply-yarn drill multicasts to mainboard and slave board with message.
The message that ply-yarn drill sends far-end sends to the TCP controll block of mainboard and slave board simultaneously, and active and standby plate is asynchronous to the processing of message, and when slave board is reached the standard grade or rolled off the production line when state variation takes place, it goes without doing that state switches for message flow.
In the embodiment of the invention, active and standby plate need be carried out state synchronized, the message of receiving group simultaneously, then before step 201, should have active and standby plate synchronous and with the far-end connection procedure, the connection procedure of describing in step 101 in concrete connection procedure and the previous embodiment is consistent, repeats no more herein.
202: slave board sends tcp state information to mainboard.
After mainboard and slave board receive the message of ply-yarn drill multicast, revise simultaneously and receive test serial number, different is that mainboard is revised rcv_nxt, slave board is revised rcv_nxt_b simultaneously, slave board sends to mainboard with amended TCP test serial number (rcv_nxt_b), identical in concrete rcv_nxt and the definition of rcv_nxt_b and the previous embodiment, repeat no more herein.
203: the tcp state information of mainboard record mainboard and slave board.
Be understandable that in the present embodiment, step 203 is an optional step.
204: mainboard is handled the TCP message, and sends the real message that is equipped with to slave board.
Mainboard receives the application module of being delivered mainboard behind the message by the mainboard protocol stack, (this processing can be the specified processing mode of user and the application module of mainboard is handled the TCP message, for example message encapsulation, or packet parsing, or message fractionation etc.) after obtain result.
Mainboard is carried on real being equipped with in the message simultaneously with the test serial number of the TCP message of this result and this result correspondence, should be equipped with message in fact and be sent to slave board.
In the present embodiment, mainboard is deleted the TCP message of this result correspondence from buffering area after processing obtains real message fully.
The reality that the application module of slave board receives the mainboard transmission is equipped with after the message, can know that mainboard finished the processing to this TCP message, then slave board keeps this reality and is equipped with result in the message, be equipped with the message from this reality simultaneously and obtain the TCP test serial number, in the slave board buffering area, mate TCP message according to this sequence number, the TCP message that matches is deleted from buffering area and the application module that the TCP message need not be submitted to slave board is handled with same sequence number.
In the present embodiment, real being equipped with in the message, include result, this result is meant handles the legitimate reading that obtains afterwards to data, be understandable that, this reality is equipped with can include only dispose indication and TCP test serial number equally in the message, this indication is used for representing that the corresponding TCP message of mainboard disposes.
When slave board need be preserved the result of mainboard, then mainboard is equipped with in the reality of issuing slave board and needs to include result in the message, when slave board did not need to preserve the result of mainboard, then mainboard was equipped with in the reality of issuing slave board and can only comprises this dispose indication and TCP test serial number in the message.
In the present embodiment, slave board is receiving after reality that mainboard sends is equipped with message, and according to this real slave board TCP message status information that is equipped with information updating self, and the slave board TCP message status information after will upgrading is sent to mainboard, stored by mainboard.
In the present embodiment, because mainboard and slave board receive the TCP message by multicast mode, so slave board need not to send the TCP message that receives to mainboard, and promptly message is backed up in realtime one by one, thereby has reduced the consumption of communication between plates bandwidth;
Secondly, in the present embodiment, slave board is after the reality that receives the mainboard transmission is equipped with message, read out result the message fully from this reality, be equipped with the sequence number that reads out the TCP message corresponding the message from this reality simultaneously with this result, and, calculate that function calculates and need not to adopt, thereby reduced the computing cost of slave board according to having the TCP message of same sequence number in this sequence number deletion slave board buffering area.
Need to prove, in the present embodiment, because mainboard and slave board have adopted multicast mode to receive the TCP message, therefore, slave board TCP message status information after slave board can will upgrade after the reality that receives the mainboard transmission is equipped with message again is sent to mainboard, thereby make the data of preserving in the mainboard separate with state, by content described above as can be known, expansion has the TCP message status of mainboard and the TCP message status of slave board, the data of preserving in the mainboard to separate with state to be meant the content of the TCP message preserved in the mainboard and its " the TCP message status of slave board " can be temporarily inconsistent on the mainboard.
Slave board just can be sent to mainboard with the slave board TCP message status after upgrading after receiving real message fully; therefore can realize the centralized backup of TCP message status; also can realize the different backup modes of service with different priority levels; for example for the business of high priority; real-time for the Guarantee Status backup; can after the complete plate TCP message status of the each renewal of slave board, just in time this state be informed mainboard; business for lower priority; for reducing the number of times of active and standby communication between plates; can be after slave board upgrades several slave boards TCP message status; concentrate again these slave boards TCP message status is sent to mainboard; therefore the embodiment of the invention can be formulated the backup protection grade at the business of different priorities effectively, thereby improves the flexibility of backup.
Described the process of two kinds of Data Receiving above, the reversed process when mainboard lost efficacy in DRP data reception process be described below:
In receiving data procedures, occur adopting following steps to carry out the process that slave board is upgraded to mainboard when mainboard lost efficacy:
Mainboard then needs to switch if lost efficacy, and the TCP link information that slave board will be in stand-by state is copied to the main agreement relevant field of using of sign, carries out work with main with state.
Need to prove, mainboard and slave board all have TCP link information separately, be respectively mainboard TCP link information and slave board TCP link information, and in the state parameter of mainboard and slave board, all there is the field that is used to identify main usefulness, insert the TCP link information of current mainboard in this field, for example the TCP link information of current mainboard is A, the TCP link information of current slave board is B, then the master in the state parameter of mainboard and slave board is A with the content in the field, if mainboard lost efficacy, then slave board can be inserted the TCP link information B of self the main with in the field of state parameter, then for ancillary equipment, current slave board uses as mainboard, and the current slave board (because former mainboard lost efficacy) that do not exist.
Whether detect mainboard and lost efficacy, concrete mode does not limit herein.
According to the active and standby plate Data Receiving flow process among aforementioned two embodiment as can be known, when switching, backed up in realtime to from last time on the mainboard that needed TCP message all exists when breaking down on slave board, therefore do not need complicated level and smooth flow process.Because mainboard lost efficacy, the message that mainboard is being handled at present is not owing to finish processing, so can not send confirmation message to far-end, therefore far-end adopts overtime retransmission mechanism, do not receive the affirmation message of mainboard feedback within a certain period of time, then far-end thinks that a last TCP message sends failure, then can send this TCP message to current mainboard, because slave board has been inserted the TCP link information of self the main field of using, so the TCP message that far-end resends can be transferred into current mainboard (being original slave board), thereby can not cause the TCP message dropping, guarantee seamlessly transitting of data yet.
Need to prove, in the present embodiment, because the TCP communication ends has adopted multicast mode to mainboard and slave board multicast packet, so circuit-switched data stream is respectively arranged between TCP communication ends and mainboard and the slave board, and the TCP communication ends only has circuit-switched data stream with mainboard in the prior art, or only one circuit-switched data stream is arranged with slave board, therefore in the prior art, when mainboard breaks down, if the TCP communication ends only and between the mainboard has data flow, then the TCP communication ends after confirming that mainboard breaks down, then the TCP communication ends can stop and mainboard between transfer of data, and to slave board transmission data, promptly set up the data channel between TCP communication ends and the slave board, just data flow is switched to slave board, then may need after one section delay, slave board can be taken over mainboard and carry out work, thereby has reduced the real-time of system.
But in the present embodiment, owing to there is two paths of data stream, therefore whether the TCP communication ends can break down by not perception mainboard, and detect by slave board, slave board is found after the main board failure, the data flow that can use the TCP communication ends to send immediately to slave board, thus mainboard work taken over, thereby can improve system real time.
Need to prove that when mainboard recovered, the mainboard that can select to recover according to subscriber policy was perhaps selected will originally take over the slave board of mainboard work again as slave board as slave board from fault.
See also the schematic diagram of Fig. 3, realize the data transmission method for uplink of TCP high reliability for an embodiment of a kind of data transmission method for uplink of the present invention.
Present embodiment adopts the TCP message to describe as the data instance that sends, is understandable that, and in actual applications, can be the data format of other types equally, packet for example, Frame etc., concrete form does not limit herein.
301: mainboard sends to slave board with TCP message to be sent;
In the present embodiment, the application module of mainboard sends to the mainboard protocol stack with TCP message to be sent, and the mainboard protocol stack sends to slave board after with described TCP packet buffer to be sent.
In the embodiment of the invention, active and standby plate need be carried out state synchronized, the message of receiving group simultaneously, then before step 301, should have active and standby plate synchronous and with the far-end connection procedure, the process that is connected in concrete connection procedure and the aforementioned data method of reseptance is similar, repeats no more herein.
302: slave board backup TCP message also sends tcp state information to mainboard;
If slave board has received the TCP message, then this TCP message is backed up, deposit this TCP message in the transmission buffering area, and feed back the test serial number of this TCP message correspondence to mainboard.
If slave board does not receive this TCP message, then slave board can periodically send the test serial number of TCP message original in the buffering area to the mainboard feedback.
The test serial number of TCP message can be regarded the tcp state information that slave board sends as.
303: the tcp state information of mainboard record mainboard and slave board;
304: mainboard sends the TCP message of buffer memory;
In the present embodiment, the TCP controll block of mainboard is judged the mainboard of mainboard record and the tcp state information of slave board, if the tcp state information of mainboard is consistent with the tcp state information of slave board, then definite this TCP message can be used, and sends according to the message sequence that sends in the buffering area.
Need to prove that if the TCP message that slave board receives, then the tcp state information of slave board feedback is consistent with the tcp state information of mainboard;
If slave board does not receive the TCP message, then because mainboard has received this TCP message, and this TCP message deposited in send in the buffering area, so the tcp state information of slave board feedback and the tcp state information inconsistency of mainboard, then in this case, mainboard can adopt retransmission mechanism, and it is consistent until the tcp state information of the tcp state information of mainboard and slave board to send this TCP message to slave board again, perhaps reaches the threshold value of number of retransmissions.
Described the process that data send above, the reversed process when mainboard lost efficacy in data transmission procedure be described below:
In sending data procedures, occur adopting following steps to carry out the process that slave board is upgraded to mainboard when mainboard lost efficacy:
Mainboard then needs to switch if lost efficacy, and the TCP link information that slave board will be in stand-by state is copied to the main agreement relevant field of using of sign, carries out work with main with state.
Need to prove, mainboard and slave board all have TCP link information separately, be respectively mainboard TCP link information and slave board TCP link information, and in the state parameter of mainboard and slave board, all there is the field that is used to identify main usefulness, insert the TCP link information of current mainboard in this field, for example the TCP link information of current mainboard is A, the TCP link information of current slave board is B, then the master in the state parameter of mainboard and slave board is A with the content in the field, if mainboard lost efficacy, then slave board can be inserted the TCP link information B of self the main with in the field of state parameter, then for ancillary equipment, current slave board uses as mainboard, and the current slave board (because former mainboard lost efficacy) that do not exist.
Whether detect mainboard and lost efficacy, concrete mode does not limit herein.
According to the aforementioned data transmission flow as can be known, when switching, backed up in realtime to from last time on the mainboard that needed TCP message all exists when breaking down on slave board, therefore do not need complicated level and smooth flow process.Because mainboard lost efficacy, the message that mainboard is being handled at present is not owing to finish processing, so can not send confirmation message to far-end, therefore far-end adopts overtime retransmission mechanism, do not receive the affirmation message of mainboard feedback within a certain period of time, then far-end thinks that a last TCP message sends failure, then can send this TCP message to current mainboard, because slave board has been inserted the TCP link information of self the main field of using, so the TCP message that far-end resends can be transferred into current mainboard (being original slave board), thereby can not cause the TCP message dropping, guarantee seamlessly transitting of data yet.
Need to prove, in the present embodiment, because the TCP communication ends has adopted multicast mode to mainboard and slave board multicast packet, so circuit-switched data stream is respectively arranged between TCP communication ends and mainboard and the slave board, and the TCP communication ends only has circuit-switched data stream with mainboard in the prior art, or only one circuit-switched data stream is arranged with slave board, therefore in the prior art, when mainboard breaks down, if the TCP communication ends only and between the mainboard has data flow, then the TCP communication ends after confirming that mainboard breaks down, then the TCP communication ends can stop and mainboard between transfer of data, and to slave board transmission data, promptly set up the data channel between TCP communication ends and the slave board, just data flow is switched to slave board, then may need after one section delay, slave board can be taken over mainboard and carry out work, thereby has reduced the real-time of system.
But in the present embodiment, owing to there is two paths of data stream, therefore whether the TCP communication ends can break down by not perception mainboard, and detect by slave board, slave board is found after the main board failure, the data flow that can use the TCP communication ends to send immediately to slave board, thus mainboard work taken over, thereby can improve system real time.
Need to prove that when mainboard recovered, the mainboard that can select to recover according to subscriber policy was perhaps selected will originally take over the slave board of mainboard work again as slave board as slave board from fault.
See also Fig. 4, be the structure chart of an embodiment of the system of a kind of transceive data of the present invention.
Be understandable that, in actual applications, except using multicast, can use multicast or broadcasting equally, or other transmission meanss, as long as make data mail to mainboard and slave board simultaneously.
Communication ends in the present embodiment can be understandable that in actual applications, this communication ends can be the communication equipment of other types equally for the ply-yarn drill shown in Fig. 4 43.
In the present embodiment, real being equipped with in the message, include result, and this result is meant handles the legitimate reading that obtains afterwards to data, is understandable that, this reality is equipped with in the message can include only the indication that disposes equally, and this indication is used for representing that the corresponding TCP message of mainboard disposes.
When slave board need be preserved the result of mainboard, then mainboard is equipped with in the reality of issuing slave board and needs to include result in the message, when slave board did not need to preserve the result of mainboard, then mainboard was equipped with in the reality of issuing slave board and can only comprises this indication that disposes in the message.
Need to prove, in the present embodiment, because ply-yarn drill 43 has adopted multicast mode to mainboard 41 and slave board 42 multicast packets, so circuit-switched data stream is respectively arranged between ply-yarn drill 43 and mainboard 41 and the slave board 42, and ply-yarn drill only has circuit-switched data stream with mainboard in the prior art, or only one circuit-switched data stream is arranged with slave board, therefore in the prior art, when mainboard breaks down, if ply-yarn drill only and between the mainboard has data flow, then ply-yarn drill confirm mainboard break down after (can detect by heartbeat data equally), then ply-yarn drill can stop and mainboard between transfer of data, and to slave board transmission data, promptly set up the data channel between ply-yarn drill and the slave board, just data flow is switched to slave board, then may need after one section delay, slave board can be taken over mainboard and carry out work, thereby has reduced the real-time of system.
But in the present embodiment, owing to there is two paths of data stream, therefore whether ply-yarn drill 43 can break down by not perception mainboard 41, and detect by slave board 42, slave board 42 is found after mainboard 41 faults, the data flow that can use ply-yarn drill 43 to send immediately to slave board 42, thus mainboard 41 work taken over, thereby can improve system real time.
Need to prove that when mainboard 41 recovered, the mainboard 41 that can select to recover according to subscriber policy was perhaps selected will originally take over the slave board 42 of mainboard work again as slave board as slave board from fault.
Be understandable that, in the present embodiment,
The mode of mainboard 41 and slave board 42 concrete deleted datas and the mode of the deleted data described in the preceding method embodiment are similar, repeat no more herein.
Foregoing description be data transmission system in the DRP data reception process, for the data transmission system in the data transmission procedure, see also Fig. 4 equally, specifically comprise:
Above-mentioned two embodiment have described DRP data reception process and the pairing data transmission system of data transmission procedure respectively, and in above-mentioned two data transmission systems, mainboard 41 may further include:
Mainboard controll block is used for the received communication end by the data that multicast mode sends, and described data are sent to mainboard protocol stack 412, will deposit buffering area in from the data of mainboard protocol stack 412 and send;
Mainboard controll block in the present embodiment is specifically as follows mainboard TCP controll block 411 in the processing procedure for the TCP message, be understandable that, in practical application, for the processing of other types data, this mainboard controll block can be carried out other corresponding functions equally;
Mainboard application module 413 is used for the data that mainboard protocol stack 412 sends are handled obtaining result, sends the reality that comprises described result to slave board 42 and is equipped with message, produces data to be sent, and described data to be sent are sent to mainboard protocol stack 412.
Wherein, mainboard TCP controll block 411 also is used to obtain mainboard data mode information;
This mainboard 41 can further include:
In this transmission system, slave board 42 may further include:
Slave board controll block is used for the received communication end by the data that multicast mode sends, and described data are sent to slave board protocol stack 422;
Slave board controll block in the present embodiment is specifically as follows slave board TCP controll block 421 in the processing procedure for the TCP message, be understandable that, in practical application, for the processing of other types data, this slave board controll block can be carried out other corresponding functions equally;
Slave board application module 423 is used to receive the reality that mainboard 41 sends and is equipped with message, is equipped with the data that message is determined the needs deletion according to described reality, and sends the deletion message to slave board protocol stack 422;
Slave board protocol stack 422 is used for depositing the data that slave board TCP controll block 421 sends in buffering area, deletes corresponding data according to the deletion message that slave board application module 423 sends in buffering area.
In the present embodiment, slave board protocol stack 422 also is used to obtain slave board data mode information;
Slave board memory module 424 is used to store the slave board data mode information that slave board protocol stack 422 obtains.
See also Fig. 5, the mainboard structure schematic diagram that provides in the embodiment of the invention comprises:
Mainboard controll block is used for the received communication end by the data that multicast mode sends, and described data are sent to mainboard protocol stack 51, will deposit buffering area in from the data of mainboard protocol stack 52 and send;
Mainboard controll block in the present embodiment is specifically as follows mainboard TCP controll block 51 in the processing procedure for the TCP message, be understandable that, in practical application, for the processing of other types data, this mainboard controll block can be carried out other corresponding functions equally;
Mainboard protocol stack 52, the data that are used for receiving from mainboard TCP controll block 51 are sent to mainboard application module 53, and the data that mainboard application module 53 is produced are sent to mainboard TCP controll block 51;
Mainboard application module 53 is used for the data that mainboard protocol stack 52 sends are handled obtaining result, sends the reality that comprises described result to slave board and is equipped with message, produces data to be sent, and described data to be sent are sent to mainboard protocol stack 52.
Wherein, mainboard TCP controll block 51 also is used to obtain mainboard data mode information;
Mainboard protocol stack 52 also is used to receive the slave board data mode information that slave board sends;
This mainboard can further include:
Mainboard memory module 54 is used to store the mainboard data mode information and the slave board data mode information that receive.
See also Fig. 6, the slave board structural representation that provides in the embodiment of the invention comprises:
Slave board controll block is used for the received communication end by the data that multicast mode sends, and described data are sent to slave board protocol stack 62;
Slave board controll block in the present embodiment is specifically as follows slave board TCP controll block 61 in the processing procedure for the TCP message, be understandable that, in practical application, for the processing of other types data, this slave board controll block can be carried out other corresponding functions equally;
Slave board application module 63 is used to receive the reality that mainboard sends and is equipped with message, is equipped with the data that message is determined the needs deletion according to described reality, and sends the deletion message to slave board protocol stack 62;
Slave board protocol stack 62 is used for depositing the data that slave board TCP controll block 61 sends in buffering area, deletes corresponding data according to the deletion message that slave board application module 63 sends in buffering area.
In the present embodiment, slave board protocol stack 62 also is used to obtain slave board data mode information;
Slave board also comprises:
Slave board memory module 64 is used to store the slave board data mode information that slave board protocol stack 62 obtains.
In the present embodiment, because the data that mainboard and slave board received communication end send by multicast mode, so mainboard can only send the result after the data processing to slave board, and do not need again and transmission data itself between the slave board, promptly message is backed up in realtime one by one, thereby has reduced the consumption of communication between plates bandwidth.
One of ordinary skill in the art will appreciate that all or part of step in the whole bag of tricks of the foregoing description is to instruct relevant hardware to finish by program, this program comprises the steps: when carrying out
The data that mainboard and slave board received communication end send;
Mainboard is handled described data;
After disposing, mainboard is equipped with message to the reality that slave board sends described data correspondence;
Slave board receives described reality and is equipped with message.
This program can be stored in the computer-readable recording medium, and storage medium can comprise: ROM, RAM, disk or CD etc.
More than the reception of the realization TCP HA that the embodiment of the invention provided and sending method and system are described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (17)
1, a kind of data receive method is characterized in that, comprising:
The data that mainboard and slave board received communication end send;
Mainboard is handled described data;
After disposing, mainboard is equipped with message to the reality that slave board sends described data correspondence;
Slave board receives described reality and is equipped with message.
2, method according to claim 1 is characterized in that, also comprises after described the disposing:
Mainboard is deleted in the mainboard buffering area with described reality and is equipped with the corresponding data of message;
Described slave board receives described reality and is equipped with and comprises after the message:
Slave board is equipped with in the message deletion slave board buffering area according to described reality and is equipped with the corresponding data of message with described reality.
3, method according to claim 2 is characterized in that, described reality is equipped with the result after message comprises described data processing;
Described slave board is equipped with according to described reality and is equipped with the corresponding data of message with described reality in the message deletion slave board buffering area and comprises:
Slave board is according to the data of the described result correspondence of reckoning function calculation that presets;
The data of the described correspondence of deletion in the slave board buffering area.
4, method according to claim 2 is characterized in that, described reality is equipped with the sign that message comprises described data;
Described method also comprises: after mainboard was handled described data, mainboard write down the sign of described data, described sign was carried on to be equipped with in the message in fact be sent to slave board;
Described slave board is equipped with according to described reality and is equipped with the corresponding data of message with described reality in the message deletion slave board buffering area and comprises:
Slave board is inquired about data corresponding in the slave board buffering area according to the sign that described reality is equipped with in the message;
Delete described data.
5, method according to claim 1 and 2 is characterized in that, described reality is equipped with message and comprises: the indication that disposes, the described indication that disposes is used to represent that mainboard finished processing to described data.
According to each described method in the claim 1 to 4, it is characterized in that 6, described mainboard and slave board received communication end comprise by the data that multicast mode sends before:
To the protocol stack between mainboard and the slave board and separately the data structure in the state parameter carry out synchronously.
7, method according to claim 1 is characterized in that, described slave board receives described reality and is equipped with and comprises after the message:
Slave board is equipped with information updating slave board data mode information according to described reality;
The slave board data mode information of slave board after mainboard sends described renewal.
8, a kind of data transmission method for uplink is characterized in that, comprising:
Mainboard obtains data to be sent, stores described data;
Mainboard sends described data to be sent to slave board;
Slave board identifies to the mainboard feedback data according to the data that mainboard sends;
When slave board received described data, mainboard sent described data according to the storage order of data.
9, method according to claim 8 is characterized in that, described slave board comprises to mainboard feedback data sign according to the data that mainboard sends:
If slave board receives the data described to be sent that mainboard sends, then feed back the sign of described data to be sent to described mainboard;
If slave board does not receive the data described to be sent that mainboard sends, then periodically send the sign of the data in the slave board buffering area to described mainboard.
10, method according to claim 9 is characterized in that,
If whether the Data Identification that mainboard receives is consistent with the Data Identification to be sent that gets access to,, determine that then slave board has received described data, if inconsistent, then adopts retransmission mechanism to resend described data to be sent to slave board if consistent.
11, a kind of data transmission system comprises mainboard and slave board, it is characterized in that,
Described mainboard is used for, and the data that the received communication end sends by the multicast mode are handled described data, and the back that disposes is equipped with message to the reality that slave board sends described data correspondence;
Described slave board is used for, and the reality that receives the mainboard transmission is equipped with message.
12, data transmission system according to claim 11 is characterized in that, described reality is equipped with message and comprises: to the result after the described data processing, and/or the Data Identification of described data, or the indication that disposes;
Described mainboard also is used in the mainboard buffering area deletion and is equipped with the corresponding data of message with described reality;
Described slave board also is used for being equipped with in the message deletion slave board buffering area according to described reality and is equipped with the corresponding data of message with described reality.
13, a kind of data transmission system comprises mainboard and slave board, it is characterized in that:
Described mainboard is used for, and obtains data to be sent, stores described data, sends described data to be sent to slave board, when definite slave board has received described data, sends described data;
Described slave board is used for, and whether the data that send according to mainboard receive described data to mainboard feedback data sign with the indication slave board.
14, a kind of mainboard is characterized in that, comprising:
Mainboard controll block is used for the data that the received communication end sends, and described data are sent to the mainboard protocol stack, will deposit buffering area in from the data of mainboard protocol stack and send;
The mainboard protocol stack, the data that are used for receiving from mainboard controll block are sent to the mainboard application module, and the data that the mainboard application module is produced are sent to mainboard controll block;
The mainboard application module is used for the data that the mainboard protocol stack that receives sends are handled obtaining result, sends the reality that comprises described result to slave board and is equipped with message, produces data to be sent, and described data to be sent are sent to the mainboard protocol stack.
15, mainboard according to claim 14 is characterized in that,
Described mainboard controll block also is used to obtain mainboard data mode information;
Described mainboard protocol stack also is used to receive the slave board data mode information that slave board sends;
Described mainboard also comprises:
The mainboard memory module is used to store the mainboard data mode information and the slave board data mode information that receive.
16, a kind of slave board is characterized in that, comprising:
Slave board controll block is used for the data that the received communication end sends, and described data are sent to the slave board protocol stack;
The slave board application module is used to receive the reality that mainboard sends and is equipped with message, is equipped with the data that message is determined the needs deletion according to described reality, and sends deletion message to the slave board protocol stack;
The slave board protocol stack is used for depositing the data that slave board controll block sends in buffering area, deletes corresponding data according to the deletion message that the slave board application module sends in buffering area.
17, slave board according to claim 16 is characterized in that,
Described slave board protocol stack also is used to obtain slave board data mode information;
Described slave board also comprises:
The slave board memory module is used to store the slave board data mode information that the slave board protocol stack obtains.
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| CN200810146268A CN101651706A (en) | 2008-08-14 | 2008-08-14 | Method, system and device for sending and receiving data |
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| CN200810146268A CN101651706A (en) | 2008-08-14 | 2008-08-14 | Method, system and device for sending and receiving data |
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| CN200810146268A Pending CN101651706A (en) | 2008-08-14 | 2008-08-14 | Method, system and device for sending and receiving data |
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