CN107257354A - A kind of adaptive UDP communication protocols of multiport - Google Patents
A kind of adaptive UDP communication protocols of multiport Download PDFInfo
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- CN107257354A CN107257354A CN201710693015.4A CN201710693015A CN107257354A CN 107257354 A CN107257354 A CN 107257354A CN 201710693015 A CN201710693015 A CN 201710693015A CN 107257354 A CN107257354 A CN 107257354A
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Abstract
The invention discloses a kind of adaptive UDP communication protocols of multiport, apply in client, the invention also discloses a kind of adaptive UDP communication protocols of multiport, apply in server, comprise the steps of：The process of communication link is set up in the port of client and the port of server；Data transmission procedure；When the data transfer of current communication link occurs abnormal, active migration to other communication links performs the data transmission procedure；And, passive migration to other communication links performs the data transmission procedure.The present invention can ensure that real time data bag is not lost, the reliability of communication is greatly improved when current communications link needs and rebuild to proceed data communication in actively or passively mode Autonomic Migration Framework to new communication link.
Description
Technical field
The invention belongs to the communications field, it is related to a kind of UDP communication protocols
Background technology
The features such as udp protocol has the communication mode that data transmission delay is low, resource overhead is small, support equity；But UDP is assisted
View is unreliable in itself, in order to ensure the real-time transmitting of data, it is necessary to appropriate host-host protocol design is carried out in application layer.
Consulting literatures, existing UDX agreements are a kind of optimization conventional data exchange agreements, parsed by flow control, transfer mode etc.
Mode realizes transmitting；PUDP agreements mix packet transmission controlling mechanism among flow control, realize UDP messages
Transmitting；UDP/NLT agreements are to be based on network coding technique, and the packet of transmission is carried out using LT and network coding technique
Coding and decoding, reduces Network Packet Loss.The situation that above-mentioned agreement is not required to rebuild mainly for port links designs what is realized, it is impossible to
Ensure that real time data is not lost when embedded airborne equipment rebuilds communication link.
The content of the invention
In view of the shortcomings of the prior art, goal of the invention of the invention is to provide a kind of multiport adaptive UDP communication protocols
MP-UDP is discussed, the agreement carries out proper communication by mechanism such as link setup, data validation, re-transmissions, and three are retransmitted in current communications link
It is secondary unsuccessfully need rebuild when, move to new port chain in an adaptive way using RMP (Rank_Move_Program) algorithm
Communicated on road.And client and service end model are set up in Simulink, MP- is realized in patterned method
Udp protocol.
The goal of the invention of the present invention is achieved through the following technical solutions：
A kind of adaptive UDP communication protocols of multiport, apply in client, comprise the steps of：
The process of communication link is set up in the port of client and the port of server；
Data transmission procedure；
When the data transfer of current communication link is rebuild, active migration to other communication links performs the number
According to transmitting procedure；
And, passive migration to other communication links performs the data transmission procedure.
According to features described above, the process that communication link is set up in the port of client and the port of server is：To server
Port transmission block number be 0 communication bag, it is waiting receive server reply block number for 0 communication bag after, show communication link
It is successfully established, is normal by the status indication of the communication link.
According to features described above, data transmission procedure is：
By communication link to server transmission block number be non-zero communication bag, if having data need send if in communication bag
Middle increase data content；
When the block number in the communication bag for receiving server reply is equal with the block number in the communication bag sent, then to server
The communication bag that transmission block number Jia 1；
According to features described above, buffer circle, the subsidiary read pointer of buffer circle and write pointer are set in client, work as visitor
When there is data transmission at family end, mobile write pointer is write data into buffer circle；When read pointer and write pointer, then move
Read pointer is by data from buffer circle reading is walked to add communication bag.
According to features described above, when the data transfer of current communication link occurs abnormal, active migration to other communications
Link performs the data transmission procedure：
If the block number received in the block number in the communication bag of server reply and the communication bag of transmission is unequal or super
Shi Wei receives the communication bag of server reply, then retransmits the communication bag, when retransmitting more than 3 times, is normal logical from remaining state
A communication link is selected to retransmit the communication bag in letter link；Meanwhile, by the status indication of current communication link to rebuild, hold
The process of communication link is set up in the port of the row client and the port of server；
Wherein, the method for selection communication link is：Using RMP algorithms in addition to the communication link currently communicated
State is that normal communication link carries out a minor sort, and by ranking results storage into queue Queue, when communication link needs
During migration, queue Queue first element is the communication link chosen.
According to features described above, passive migration to other communication links performs the data transmission procedure and is：To except currently just
State beyond the communication link of communication is monitored for normal communication link, has communication to a certain communication link is listened to
When bag is sended over, then move to and perform the data transmission procedure on the communication link that communication bag is sended over, while right
Former communication link performs the port of the client and the port of server and sets up the process of communication link.
A kind of adaptive UDP communication protocols of multiport, apply in server, comprise the steps of：
The process of communication link is set up in the port of server and the port of client；
Data transmission procedure；
When the data transfer of current communication link occurs abnormal, active migration to other communication links performs the number
According to transmitting procedure；
And, passive migration to other communication links performs the data transmission procedure.
According to features described above, the process that communication link is set up in the port of server and the port of client is：Work as server
Port receive block number that the port of client sends for 0 communication bag after, to the port of client reply block number for 0 it is logical
Letter bag, shows that communication link is successfully established, is normal by the status indication of the communication link.
According to features described above, data transmission procedure is：If the block number for the communication bag that the client being currently received is sent
It is that the block number of the communication bag received last time Jia 1, then it is identical with the block number in the communication bag received to reply block number to client
Communication bag, if having data transmission if data content is added in communication bag.
According to features described above, buffer circle, the subsidiary read pointer rptr of buffer circle and write pointer are set in server
Wptr, when server has data transmission, mobile write pointer is write data into buffer circle；When read pointer and write pointer not
Deng then moving read pointer and read to walk to add communication bag from buffer circle by data.
According to features described above, when the data transfer of current communication link occurs abnormal, active migration to other communications
Link performs the data transmission procedure：
If the block number for the communication bag that the client being currently received is sent is not the block number of the communication bag received last time
Plus 1, or time-out does not receive the communication bag of client transmission, then retransmits last time communication bag, when retransmitting more than 3 times, from remaining
State be normal communication link in select a communication link retransmit last time communication bag；Meanwhile, by current communication link
Status indication performs the port of the server and the port of client and sets up the process of communication link to rebuild；
Wherein, the method for selection communication link is：Using RMP algorithms in addition to the communication link currently communicated
State is that normal communication link carries out a minor sort, and by ranking results storage into queue Queue, when communication link needs
During migration, queue Queue first element is the communication link chosen.
According to features described above, passive migration to other communication links performs the data transmission procedure and is：To except currently just
State beyond the communication link of communication is monitored for normal communication link, has communication to a certain communication link is listened to
When bag is sended over, then move to and perform the data transmission procedure on the communication link that communication bag is sended over, while right
Former communication link performs the port of the server and the port of client and sets up the process of communication link.
The beneficial effects of the present invention are：The adaptive UDP communication protocol MP-UDP of multiport, weight is needed in current ink
It can be ensure that in real time with proceeding data communication in actively or passively mode Autonomic Migration Framework to new port links when building
Packet is not lost, and the reliability of communication is greatly improved；Meanwhile, client and service end are built using Simulink
Mould, realizes MP-UDP agreements in the way of model, and checking is tested to model, enters so as to the logic to agreement
Intuitively analysis judges row；Furthermore, it is possible to by the auto-building model C code after checking, encoded than traditional-handwork it is more reliable, because
And can be in built-in field popularization and application.
Brief description of the drawings
Fig. 1 is the form schematic diagram of communication bag in embodiment；
Fig. 2 is the schematic flow sheet of data transfer in embodiment；
Fig. 3 is the schematic flow sheet that communication link is migrated；
Fig. 4 is the structural representation of buffer circle；
The model schematic for the client that Fig. 5 is set up in Simulink；
Fig. 6 is RMP algorithm models；
The schematic diagram for the active migration model that Fig. 7 is set up in Simulink；
The schematic diagram for the main passive migration model of client that Fig. 8 is set up in Simulink；
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
1st, the adaptive UDP communication protocols of multiport：MP-UDP agreements
1.1 communication format
The communication bag of MP-UDP agreements is divided into 5 parts, as shown in Figure 1.
1) packet header, includes 3 bytes：Head1, Head2, Head3；
2) block number, with a byte representation, scope is from 0 to 255；Wherein, 0 is used for representing to set up the block connected for the first time
Number, 1 to 255 represent circulation between active block number, 1 to 255.
3) length, comprising 2 bytes, records the length of whole message blocks.
4) data content, is transmitted by byte, maximum 500 bytes.
5) verification and, comprising 2 bytes, using it is cumulative and by the way of calculate check bit.
1.2 communication process
When MP-UDP agreements are communicated, N number of port (N is 5 in checking) is distributed at client service end first, and by whole
Type array LinkStatus [N] records the communications status of each communication link.Then UDP communications are carried out to 5 ports respectively
Initialization, success after enter communication process.
Client communication flow：；
1) process of communication link is set up in the port of client and the port of server.
5 ports are respectively to the communication bag that 5 port transmission blocks number on server are 0, and request is set up with server to be connected
Connect, the communication bag that the block number for waiting the reception server to reply is 0.Receive server reply block number for 0 communication bag after, represent
The communication link of the port is it has been established that be normal by the status indication of communication link, the numbering of 5 communication links is respectively
N1、N2、N3、N4、N5.As shown in Figure 2.
2) data transmission procedure.
Client is communicated by N1 communication links since communication bag of the block number for 1, logical if having data to need to send
Letter bag increase data content；N2~N5 links are monitored simultaneously.
The block number for the communication bag that the server received when N1 communication links is replied it is equal with the block number of the communication bag of transmission (or
The block number for the communication bag that person replys is 1, when 255) the communication enclosed mass number of transmission is, then it represents that packet is sent successfully, and block number Jia 1
Send next communication bag.As shown in Figure 2.
3) when the data transfer of current communication link occurs abnormal, active migration to other communication links performs data
Transmitting procedure.
If the block number that N1 communication links receive communication bag of the block number of the communication bag of server reply with sending is unequal
Or time-out does not receive reply, then the communication bag (being assumed to be the communication bag that block number is 1) is retransmitted.Block number is 1 communication packet retransmission
During more than 3 times, by the status indication of N1 communication links to rebuild, link is re-established.Using RMP algorithms, by N1 communication links
Active migration is to being communicated on N2 communication links, and transmission block number is 1 communication bag on N2 communication links.As shown in Figure 3.
4) passive migration performs the data transmission procedure to other communication links.
When a certain communication link listens to communication bag in N2~N5, show that communication link has actively been moved to N2 by server
Communication link is passively moved to a certain communication link in N2~N5 by a certain communication link in~N5, client, is performed
Data transmission procedure, while re-establishing N1 communication links.As shown in Figure 3.
Server communication flow：
1) process of communication link is set up in the port of server and the port of client.
The communication bag that 5 ports of server block number that client to be received is sent respectively etc. is 0, receives 0 piece of communication bag
Afterwards, block number is replied respectively to client for 0 communication bag, represents the port communication link it has been established that by the state of communication link
Labeled as normal.As shown in Figure 2.
2) data transmission procedure.
Server is communicated by N1 communication links, while monitoring N2~N5 communication links.If currently connect
The block number for the communication bag that the clients of receipts is sent is that the block number of the communication bag received last time Jia 1 (or current receiving block number is on 1
When 255) secondary receiving block number is, then correct communication bag is received.
Service end replys the block identical communication bag for the communication bag that block number is sent with client to client, if there is data
Transmission then adds data content in communication bag.As shown in Figure 2.
3) when the data transfer of current communication link occurs abnormal, active migration to other communication links performs described
Data transmission procedure.
If the block number that the block number for the communication bag that currently received client is sent is not the communication bag received last time Jia 1 or
Person's time-out does not receive data, then service end retransmits last time communication bag (assuming that block number is 2).The communication packet retransmission that block number is 2 is more than 3
When secondary, the mode of taking the initiative migrates link, by the status indication of N1 communication links to rebuild, re-establishes link.Calculated using RMP
Method, by N1 communication links active migration to when being communicated in N2~N5 on a certain communication link, a certain communication in N2~N5
Transmission block number is 2 communication bag on link.As shown in Figure 3.
4) passive migration performs the data transmission procedure to other communication links.
When a certain communication link listens to communication bag in N2~N5, show client active migration communication link, service
Passive mode is taken to move to a certain communication link in N2~N5 in end.As shown in Figure 3.
1.3 RMP algorithms are designed
When N1 communication links are rebuild, it is necessary to communication link is moved to can proper communication N2~N5 in a certain communication chain
Lu Shang.In N number of communication link, some possible communication link is rebuild, if carried out successively to N number of communication link time
Lookup Nk is gone through, when network environment is poor, and reconstruction link is more, efficiency can be very low, it is equally possible to can cause real time data
Loss.Thus devise RMP algorithms to be quickly found out Nk links.
Each communication link has a Status Flag LinkStatus [N] in design, marks the shape of current communications link
State, normal communication state is 1, rebuilds or init state is 0.In N1 proper communications, RMP algorithms can be to other communication links
Quicksort is carried out according to respective state, and stored the result into queue Queue.
So when communication link needs migration, queue Queue first element is the communication link of selection.Due to
The state of each communication link is all random distribution, only 0 or 1 two value, time most short using the method time of quicksort
Complexity is O (nlog2n).Because sequence is carried out in N1 link proper communications, and only sort once, efficiency is very high.When
When N1 moves to Nk, it ensure that real time data is not lost.
1.4 Buffer Design
In order to ensure that data will not be coated to losing of cover in transceiving data and link transition process, in client in design
End and server add buffer circle respectively, and structure is as shown in Figure 4.
The subsidiary read pointer rptr and write pointer wptr of buffer circle, original state rptr and wptr all point to loop buffer
Area initial address MIN, buffer circle is sky.When there is data transmission, mobile wptr is write data into buffer circle；
Wptr and rptr, then illustrate there is data write-in in buffer circle, and data are read by mobile rptr from buffering area.Work as wptr
When pointing to MAX with rtpr, pointer is reset into MIN, the circulation read-write of buffer circle is realized.
2nd, Simulink sets up model
Client models and server model are established in Simulink, MP-UDP agreements are realized.With client mould
Exemplified by type, actively and passively two kinds of link migration patterns are discussed in detail.
2.1 client active migration models
Client will move to new communication link after a certain communication link retransmits three failures with active mode,
As shown in Figure 5.RMP_State states are initially entered, 5 road ports are handled using RMP algorithms, according to Queue in queue
[0] value moves to N1_Link into N5_Link links.Wherein, RMP algorithm models are as shown in fig. 6, main include quick row
Sequence QuickSort functions and queue operation QueueProcess parts.
By taking N1 communication links as an example, communication process is as shown in Figure 7.
2.2 client passive migration models
Other communication links that client is listened to outside current communications link have reply data, then carry out passive migration,
As shown in Figure 8.Listen_State states are initially entered, by Listen_Link functions, to other communications beyond iPort
Link is monitored, and returns to Status Flag iLStatus.According to iLStatus value, iPort value is updated, passively will communication
Move in new communication link.
It is understood that for those of ordinary skills, can be with technique according to the invention scheme and its hair
Bright design is subject to equivalent substitution or change, and all these changes or replacement should all belong to the guarantor of appended claims of the invention
Protect scope.
Claims (12)
1. a kind of adaptive UDP communication protocols of multiport, apply in client, comprise the steps of：
The process of communication link is set up in the port of client and the port of server；
Data transmission procedure；
When the data transfer of current communication link occurs abnormal, active migration to other communication links performs the data and passed
Defeated process；
And, passive migration to other communication links performs the data transmission procedure.
2. a kind of adaptive UDP communication protocols of multiport according to claim 1, it is characterised in that the end of the client
Mouthful and the port of server set up the process of communication link and be：The communication bag for being 0 to the port transmission block number of server, it is to be received
After being 0 communication bag to the block number that server is replied, show that communication link is successfully established, be by the status indication of the communication link
Normally.
3. a kind of adaptive UDP communication protocols of multiport according to claim 1, it is characterised in that the data transfer mistake
Cheng Wei：
By communication link to server transmission block number be non-zero communication bag, if having data need send if in communication bag increase
Plus data content；
When the block number in the communication bag for receiving server reply is equal with the block number in the communication bag sent, then sent to server
The communication bag that block number Jia 1.
4. the adaptive UDP communication protocols of a kind of multiport according to claim 3, it is characterised in that ring is set in client
Shape buffering area, the subsidiary read pointer of buffer circle and write pointer, when client has data transmission, mobile write pointer writes data
Enter in buffer circle；When read pointer and write pointer, then move read pointer and read to walk to add from buffer circle by data to lead to
In letter bag.
5. the adaptive UDP communication protocols of a kind of multiport according to claim 1, it is characterised in that when current communication chain
When the data transfer on road occurs abnormal, active migration to other communication links performs the data transmission procedure and is：
If receive server reply communication bag in block number with transmission communication bag in block number it is unequal or it is overtime not
The communication bag of server reply is received, then retransmits the communication bag, is normal communication chain from remaining state when retransmitting more than 3 times
A communication link is selected to retransmit the communication bag in road；Meanwhile, by the status indication of current communication link to rebuild, perform institute
State the port of client and the port of server and set up the process of communication link；
Wherein, the method for selection communication link is：Using RMP algorithms to the state in addition to the communication link currently communicated
A minor sort is carried out for normal communication link, and by ranking results storage into queue Queue, when communication link needs migration
When, queue Queue first element is the communication link chosen.
6. the adaptive UDP communication protocols of a kind of multiport according to claim 1, it is characterised in that passive migration is to other
Communication link performs the data transmission procedure：It is normal logical to the state in addition to the communication link currently communicated
Letter link is monitored, and to when listening to a certain communication link and having the communication bag to send over, has then been moved to communication bag and has been transmitted across
The data transmission procedure is performed on the communication link come, while performing port and the service of the client to former communication link
The process of communication link is set up in the port of device.
7. a kind of adaptive UDP communication protocols of multiport, apply in server, comprise the steps of：
The process of communication link is set up in the port of server and the port of client；
Data transmission procedure；
When the data transfer of current communication link occurs abnormal, active migration to other communication links performs the data and passed
Defeated process；
And, passive migration to other communication links performs the data transmission procedure.
8. a kind of adaptive UDP communication protocols of multiport according to claim 7, it is characterised in that the end of the server
Mouthful and the port of client set up the process of communication link and be：The block sent when the port that the port of server receives client
Number for 0 communication bag after, to client port reply block number be 0 communication bag, show that communication link is successfully established, this led to
Believe that the status indication of link is normal.
9. a kind of adaptive UDP communication protocols of multiport according to claim 7, it is characterised in that the data transfer mistake
Cheng Wei：
If the block number that the block number for the communication bag that the client being currently received is sent is the communication bag received last time Jia 1,
The block identical communication bag in block number and the communication bag that receives is replied to client, if there are data to send in communication bag
Add data content.
10. the adaptive UDP communication protocols of a kind of multiport according to claim 9, it is characterised in that set in server
Buffer circle, the subsidiary read pointer of buffer circle and write pointer, when server has data transmission, move write pointer by data
Write in buffer circle；When read pointer and write pointer, then move read pointer and read to walk to add from buffer circle by data
In communication bag.
11. the adaptive UDP communication protocols of a kind of multiport according to claim 7, it is characterised in that when current communication
When the data transfer of link occurs abnormal, active migration to other communication links performs the data transmission procedure and is：
If the block number that the block number for the communication bag that the client being currently received is sent is not the communication bag received last time Jia 1,
Or time-out does not receive the communication bag of client transmission, then last time communication bag is retransmitted, when retransmitting more than 3 times, from remaining state
To select a communication link to retransmit last time communication bag in normal communication link；Meanwhile, by the state of current communication link
Labeled as reconstruction, perform the port of the server and the port of client and set up the process of communication link；
Wherein, the method for selection communication link is：Using RMP algorithms to the state in addition to the communication link currently communicated
A minor sort is carried out for normal communication link, and by ranking results storage into queue Queue, when communication link needs migration
When, queue Queue first element is the communication link chosen.
12. the adaptive UDP communication protocols of a kind of multiport according to claim 1, it is characterised in that passive migration arrives it
Its communication link performs the data transmission procedure：It is normal to the state in addition to the communication link currently communicated
Communication link is monitored, and to when listening to a certain communication link and having the communication bag to send over, has then moved to communication bag transmission
The data transmission procedure is performed on the communication link come over, while performing port and the visitor of the server to former communication link
The process of communication link is set up in the port at family end.
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| CN112019450A (en) * | 2019-05-31 | 2020-12-01 | 微软技术许可有限责任公司 | Inter-device streaming communication |
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Non-Patent Citations (1)
| Title |
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| 张新等: "<多端口自适应UDP通信协议的设计与实现>", 《计算机工程与设计》 * |
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| CN112019450A (en) * | 2019-05-31 | 2020-12-01 | 微软技术许可有限责任公司 | Inter-device streaming communication |
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