CN109005011A - It is a kind of for the data transmission method of underwater acoustic network, system and readable storage medium storing program for executing - Google Patents
It is a kind of for the data transmission method of underwater acoustic network, system and readable storage medium storing program for executing Download PDFInfo
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- CN109005011A CN109005011A CN201810908859.0A CN201810908859A CN109005011A CN 109005011 A CN109005011 A CN 109005011A CN 201810908859 A CN201810908859 A CN 201810908859A CN 109005011 A CN109005011 A CN 109005011A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
- H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/36—Flow control; Congestion control by determining packet size, e.g. maximum transfer unit [MTU]
- H04L47/365—Dynamic adaptation of the packet size
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
- H04B13/02—Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The present invention relates to a kind of for the data transmission method of underwater acoustic network, system and readable storage medium storing program for executing, which includes: the data transmission fails rate and data delay time for obtaining coding packet in data transmission procedure；It obtains data transmission fails rate and meets the first preset condition, and data delay time meets the size for the data block transmitted when the second preset condition；Carried out data transmission according to the data packet of the acquiring size respective numbers of data block based on fountain codes；The size of each data packet is preset value.The embodiment of the present invention is by obtaining data transmission fails rate and data delay time in data transmission procedure, the size of the data block transmitted in more excellent situation is obtained according to data transmission fails rate and data delay time, it is subsequent when carrying out data transmission, after being encoded according to the acquiring size data packet of the data block and transmit, to reach higher end-to-end delivery rate, thus reduce end to end delay and it is more energy efficient.
Description
Technical field
The present invention relates to underwater sound communication network technical field more particularly to a kind of transmission side datas for underwater acoustic network
Method, system and readable storage medium storing program for executing.
Background technique
Underwater sound network is characterized in that propagation delay is long, channel is error-prone low with available bandwidth.In addition, current water
Acoustic modem be it is semiduplex, send and receive between state transfer lag than more significant, from several hundred milliseconds by several seconds.
These features make the conventional method of the reliable data transmission of land become no longer reliable in network under water.Firstly, end is arrived
The data transmission method at end is very inefficient, because any one transmission fault jumped all will lead to from source node to aggregation node
It retransmits, this dramatically increases average end-to-end delays.Secondly as being carried out data transmission using hop-by-hop mode, data dissemination
It is larger with the delay of node state conversion, so primary retransmit the performance that may seriously reduce total system.
Summary of the invention
Of the existing technology in order to solve the problems, such as, at least one embodiment of the present invention provides a kind of for underwater sound net
Data transmission method, system and the readable storage medium storing program for executing of network.
In a first aspect, the embodiment of the invention provides a kind of data transmission method for underwater acoustic network, data transmission
Method includes:
Obtain data transmission fails rate and data delay time of the coding packet in data transmission procedure；
It obtains the data transmission fails rate and meets the first preset condition, and the data delay time meets second and presets
The size for the data block transmitted when condition；
Carried out data transmission according to the data packet of the acquiring size respective numbers of the data block based on fountain codes；Each institute
The size for stating data packet is preset value.
Based on the above-mentioned technical proposal, the embodiment of the present invention can also make following improvement.
With reference to first aspect, in the first embodiment of first aspect,
Based on fountain codes to a certain number of data packet groups at data block encoded to obtain the coding packet of preset quantity,
Coding packet is transmitted, the data transmission fails rate for obtaining coding packet in transmission process specifically includes:
Wherein, P is the data transmission fails rate, miFor the quantity of the data packet, M for based on the fountain codes to institute
State the coding packet number that data block is encoded, pi eFor i-th of node to the Packet Error Ratio between i+1 node, k is to compile
The number of code packet transmission success.
The first embodiment with reference to first aspect, in second of embodiment of first aspect, when the data postpone
Between include: theoretical transmission delay and theoretical queueing delay.
Second of embodiment with reference to first aspect, in the third embodiment of first aspect, the theoretical transmission prolongs
Slow calculation method includes:
The theoretical transmission delay is calculated according to the data transmission fails rate:
Wherein, diPostpone for i-th of node to theoretical transmission described between i+1 node, tiFor i-th of node to i-th
The average transmission time of transmission success between+1 node, P are the data transmission fails rate.
Second of embodiment with reference to first aspect, in the 4th kind of embodiment of first aspect, theoretical be lined up is prolonged
Slow calculation method includes:
Number is sent according to the coding packet of the unit time in data transmission procedure described in the theoretical transmission Delay computing:
Wherein, μiCoding packet for i-th of node to unit time between i+1 node sends number,It is i-th
Node, which is in, sends shape probability of state,The probability of reception state, t are in for i+1 nodeiFor i-th of node to i-th+
The average transmission time of transmission success between 1 node, P are the data transmission fails rate；
The probability that any node is in reception state is set according to the quantity of data packet:
Wherein,It is in for i-th of node and sends shape probability of state,The general of reception state is in for i-th of node
Rate, e are natural constant, miFor the quantity of the data packet, M is to be encoded to obtain to the data block based on the fountain codes
Coding packet number；
Theoretical queuing of the number calculation code packet in data transmission procedure is sent according to the coding packet of the unit time
Delay:
Wherein, qiIt is coding packet in the theoretical queueing delay of i-th of node, λ is that the queueing delay of coding packet meets Poisson
The parameter of distribution, μiCoding packet for i-th of node to unit time between i+1 node sends number, miFor the data
The quantity of packet；
Calculate the data delay time:
τi=qi+di；
τiThe data delay time in i-th of node is wrapped for the coding.
Any one embodiment with reference to first aspect or in first, second, third or the 4th kind of embodiment of first aspect,
In the 5th kind of embodiment of first aspect, fountain codes are based on according to the data packet of the acquiring size respective numbers of the data block
Carry out data transmission, specifically include:
According to the data packet of the acquiring size respective numbers of the data block；
By all data packet groups at data block；
The data block is encoded into the coding packet of predetermined number based on fountain codes, sends reception for coding packet
End.
The 5th kind of embodiment with reference to first aspect obtains the data and passes in the 6th kind of embodiment of first aspect
Defeated failure rate meets the first preset condition, and the data delay time meets the data block transmitted when the second preset condition
Size specifically includes:
The data transmission fails rate is less than preset threshold, and the data delay time is minimum value as constraint item
The quantity of the data packet is calculated in part；
Using the quantity of the data packet as the size for the data block transmitted.
Second aspect, the embodiment of the invention provides a kind of data transmission system for underwater acoustic network, described device packets
Include: memory, processor and at least one be stored in the memory and be configured as the meter executed by the processor
Calculation machine program, the computer program are configurable for executing transmission side data described in any embodiment in first aspect
Method.
The third aspect, the embodiment of the invention provides a kind of computer readable storage medium, the computer-readable storage
Computer program is stored in medium, the computer program can be executed by processor to realize any embodiment in first aspect
The data transmission method.
Above-mentioned technical proposal of the invention has the advantages that the embodiment of the present invention by obtaining number compared with prior art
According to the data transmission fails rate and data delay time in transmission process, obtained according to data transmission fails rate and data delay time
The size of the data block transmitted in more excellent situation, it is subsequent when carrying out data transmission, according to the acquiring size of the data block
The data packet of respective numbers, is then encoded and is transmitted, to reach higher end-to-end delivery rate, to reduce end-to-end
Delay and more energy efficient.
Detailed description of the invention
Fig. 1 is a kind of data transmission method flow diagram for underwater acoustic network provided in an embodiment of the present invention；
Fig. 2 be another embodiment of the present invention provides a kind of data transmission method flow diagram for underwater acoustic network；
Fig. 3 is a kind of data transmission method flow diagram for underwater acoustic network that further embodiment of this invention provides；
Fig. 4 is a kind of data transmission system structural schematic diagram for underwater acoustic network that further embodiment of this invention provides.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of data transmission method for underwater acoustic network provided in an embodiment of the present invention, data transmission
Method includes:
S11, data transmission fails rate and data delay time of the coding packet in data transmission procedure are obtained.
In the present embodiment, in data transmission procedure, Packet Error Ratio of the data packet between different nodes is determined by channel quality
It is fixed, in underwater acoustic network, since the Packet Error Ratio that data are transmitted in underwater environment is bigger than the data of land transmission Packet Error Ratio, institute
By carry out data transmission in underwater acoustic network it is more common in a manner of be to be carried out data transmission using fountain codes, and pass through fountain codes
When carrying out data transmission, for example, based on fountain codes to a certain number of data packet groups at data block encoded and preset
The coding packet of quantity transmits coding packet, obtains data transmission fails rate of the coding packet in data transmission procedure, specifically
Include:
Wherein, P is data transmission fails rate, miFor the quantity of data packet, M is to be carried out based on fountain codes to the data block
Obtained coding packet number is encoded,For i-th of node to the Packet Error Ratio between i+1 node, k be the transmission of coding packet at
The number of function.
In the present embodiment, when coding packet, which sends successful number, is greater than or equal to predetermined number, based on fountain codes
Raw data packets can be obtained in principle, so the probability of raw data packets transmission failure is that the successful number of coding packet transmission is small
The probability and value under all situations when predetermined number.
In the present embodiment, in underwater acoustic network, since the transmission process of coding packet between the individual nodes is to follow elder generation
Carry out data transmission into the queued discipline first gone out, so the queueing delay in the transmission process of coding packet is the number that cannot ignore
Value is exactly data transfer delay there are also one, i.e. the transmission delay of data packet in the channel, and transmission delay also needs to transmit
The probability of failure thus can obtain true transmission delay by the probability of transmission failure, i.e., when the channel the case where not
Become, then transmission delay is a steady state value, and transmission delay can be obtained divided by the success rate that coding packet is sent in transmission delay at this time；
So the data delay time in data transmission procedure includes: theoretical queueing delay and theoretical transmission delay.
Wherein, the calculation method of theoretical transmission delay includes:
Theoretical transmission delay is calculated according to data transmission fails rate:
Wherein, diPostpone for i-th of node to theoretical transmission between i+1 node, tiFor i-th of node to i+1
The average transmission time of transmission success between node, P are data transmission fails rate.
Wherein, as shown in Fig. 2, the calculation method of theoretical queueing delay includes:
S21, number is sent according to the coding packet of the unit time in theoretical transmission Delay computing data transmission procedure:
Wherein, μiCoding packet for i-th of node to unit time between i+1 node sends number,It is i-th
Node, which is in, sends shape probability of state,The probability of reception state, t are in for i+1 nodeiFor i-th of node to i-th+
The average transmission time of transmission success between 1 node, P are data transmission fails rate.
The probability that any node is in reception state is set according to the quantity of data packet:
Wherein,It is in for i-th of node and sends shape probability of state,The general of reception state is in for i-th of node
Rate, e are natural constant, miFor the quantity of data packet, M is the coding encoded based on fountain codes to the data block
Packet number.
For example, in the present embodiment, we remember that node i is in transmission shape probability of state and isIt is then clearly variable number
According to block size miA function: lesser miMean bigger encoding rate, therefore, it is intended that poor channel condition；In order to
This point is compensated, if the channel quality between node i and node i+1 is poor, node i should be assigned biggish send generally
Rate.Therefore, it should be miMonotonic decreasing function.For simplifying the analysis, it enables
S22, theoretical queuing of the number calculation code packet in data transmission procedure is sent according to the coding packet of unit time
Delay:
Wherein, qiIt is coding packet in the theoretical queueing delay of i-th of node, λ is that the queueing delay of coding packet meets Poisson
The parameter of distribution, μiCoding packet for i-th of node to unit time between i+1 node sends number, miFor data packet
Quantity.Then whole system can be abstracted into a Jackson network, because the service time of each node substantially obeys index
Distribution, it is possible to pass through.
In summary:
τi=qi+di；
τiThe data delay time in i-th of node is wrapped for coding.
S12, data transmission fails rate the first preset condition of satisfaction is obtained, and data delay time meets the second preset condition
When the size of data block transmitted.
In the present embodiment, data transmission fails rate is less than preset threshold, and data delay time is minimum value conduct
The quantity of data packet is calculated in constraint condition；Using the quantity of data packet as the size for the data block transmitted, to guarantee number
According to transmission success rate highest, in the present embodiment, since the quantity of coding packet is fixed value, by adjusting the size of data packet,
The failure rate of data transmission can be adjusted, while by the calculation formula of above-mentioned data delay time, finding data transmission and losing
Rate is lost less than preset threshold and the quantity of the data packet in the smallest situation of data delay time, is determined by the quantity of data packet
The size for the data block transmitted.
S13, carried out data transmission according to the data packet of the acquiring size respective numbers of data block based on fountain codes；Every number
Size according to packet is preset value.
In node i, after receiving grouping from node i -1, mi package is synthesized into a block, m firstiIt is defined
For the data block size of node i.Then, it is wrapped each block coding at M coding with fountain codes, and M is defined as the number of coding
According to block size.In order to facilitate design, M be for each node it is identical, later, M coding packet is sent node by node i
i+1。
In the present embodiment, since the Packet Error Ratio that data are transmitted in underwater environment transmits Packet Error Ratio more than the data of land
Greatly, so carrying out data transmission more common mode in underwater acoustic network is carried out data transmission using fountain codes, fountain codes,
The transmitting terminal random coded for referring to this coding generates any number of coding groups by k original packet, and source node is not being known
In the case that whether these data packets of road are successfully received, data packet is persistently sent.As long as and receiving end receives k (1+ ε) a volume
Code packet random subset, that is, receive one less times greater than or equal to original k value N, so that it may by decoding with high probability successfully
Restore whole raw data packets.
As shown in figure 3, being carried out data transmission according to the data packet of the acquiring size respective numbers of data block based on fountain codes
Method include:
S31, the data packet according to the acquiring size respective numbers of data block.
In the present embodiment, the size of data block is calculated through the foregoing embodiment, from all data packets to be sent
The data packet of middle acquisition and the size respective numbers of the data block, for example, the size for the data block being calculated is 10MB, each
The size of data packet is 1MB, then need to only obtain 10 data packets.
S32, by all data packet groups at data block.
It is convenient by all data packet groups to be sent at data block when being carried out data transmission every time by fountain codes
Carry out data transmission.
Coding packet is sent receiving end by S33, the coding packet that data block is encoded into predetermined number based on fountain codes.
In the present embodiment, the transmission based on fountain codes and analysis mode are encoded data block to obtain preset quantity
Coding packet, by all codings packet be sent to next node, if next node can be correctly decoded original miA data packet,
Then a upward node is sent the ACK of affirmative by next node.Otherwise, a upward node is sent negative ACK, instruction by next node
Unrecovered packet quantity.Based on negative ACK information, a upper node will send more odd encoder packet to next node, if next section
The quantity for the coding packet that the coding packet that point receives in the re-transmission is received with before, which reaches, can restore all original mi
When a data packet, then the process of data transmission is completed.Wherein, ACK is confirmation character, and in data communication, receiving station issues
A kind of transmission class control character of dispatching station indicates that the data sent have confirmed that reception is errorless.
As shown in figure 4, the embodiment of the invention provides a kind of data transmission system for underwater acoustic network, device includes:
Memory, processor and at least one be stored in memory and be configured as by processor execute computer program, meter
Calculation machine program is configurable for executing the data transmission method in any of the above-described embodiment.
To in above-described embodiment system or device provide for recording the software of the function that above-described embodiment may be implemented
The storage medium of the program code of program, and read and execute by the computer (or CPU or MPU) of system or device and be stored in
Program code in storage medium.
In this case, the function of above-described embodiment is executed from the program code itself that storage medium is read, and stored
The storage medium of program code constitutes the embodiment of the present invention.
As for providing the storage medium of program code, for example, floppy disk, hard disk, CD, magneto-optic disk, CD-ROM, CD-R,
Tape, Nonvolatile memory card, ROM, and the like can use.
The function of above-described embodiment can not only realize by executing the program code read by computer, Er Qieke
To pass through at some or all of reality of the OS (operating system) run on computers according to the instruction execution of program code
Reason operation is to realize.
In addition, being write in the program code read from storage medium the embodiment of the invention also includes such a case
Enter to be inserted into after the function expansion card of computer, or depositing of providing in the functional expansion unit being connected with computer is provided
After reservoir, CPU for including in function expansion card or functional expansion unit or the like is executed according to the order of program code
Part processing or all processing, to realize the function of above-described embodiment.
The embodiment of the invention provides a kind of computer readable storage medium, meter is stored in computer readable storage medium
Calculation machine program, computer program can be executed by processor to realize the data transmission method in any of the above-described embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (9)
1. a kind of data transmission method for underwater acoustic network, which is characterized in that the data transmission method includes:
Obtain data transmission fails rate and data delay time of the coding packet in data transmission procedure；
It obtains the data transmission fails rate and meets the first preset condition, and the data delay time meets the second preset condition
When the size of data block transmitted；
Carried out data transmission according to the data packet of the acquiring size respective numbers of the data block based on fountain codes；Each number
Size according to packet is preset value.
2. data transmission method according to claim 1, which is characterized in that
Based on fountain codes to a certain number of data packet groups at data block encoded to obtain the coding packet of preset quantity, to institute
It states coding packet to be transmitted, obtains data transmission fails rate of the coding packet in data transmission procedure, specifically include:
Wherein, P is the data transmission fails rate, miFor the quantity of the data packet, M is based on the fountain codes to the number
The coding packet number encoded according to block,For i-th of node to the Packet Error Ratio between i+1 node, k is coding
The number of packet transmission success.
3. data transmission method according to claim 2, which is characterized in that the data delay time includes: theoretical biography
Defeated delay and theoretical queueing delay.
4. data transmission method according to claim 3, which is characterized in that the calculation method packet of the theoretical transmission delay
It includes:
The theoretical transmission delay is calculated according to the data transmission fails rate:
Wherein, diPostpone for i-th of node to theoretical transmission described between i+1 node, tiFor i-th of node to i+1
The average transmission time of transmission success between node, P are the data transmission fails rate.
5. data transmission method according to claim 3, which is characterized in that the calculation method packet of the theory queueing delay
It includes:
Number is sent according to the coding packet of the unit time in data transmission procedure described in the theoretical transmission Delay computing:
Wherein, μiCoding packet for i-th of node to unit time between i+1 node sends number,For i-th of node
In send shape probability of state,The probability of reception state, t are in for i+1 nodeiFor i-th of node to i+1
The average transmission time of transmission success between node, P are the data transmission fails rate；
The probability that any node is in reception state is set according to the quantity of data packet:
Wherein,It is in for i-th of node and sends shape probability of state,The probability of reception state is in for i-th of node, e is
Natural constant, miFor the quantity of the data packet, M is the volume encoded based on the fountain codes to the data block
Code packet number；
Theoretical queueing delay of the number calculation code packet in data transmission procedure is sent according to the coding packet of the unit time:
Wherein, qiIt is coding packet in the theoretical queueing delay of i-th of node, λ is that the queueing delay of coding packet meets Poisson distribution
Parameter, μiCoding packet for i-th of node to unit time between i+1 node sends number, miFor the number of the data packet
Amount；
Calculate the data delay time:
τi=qi+di；
τiThe data delay time in i-th of node is wrapped for the coding.
6. any data transmission method in -5 according to claim 1, which is characterized in that according to the size of the data block
The data packet for obtaining respective numbers is carried out data transmission based on fountain codes, is specifically included:
According to the data packet of the acquiring size respective numbers of the data block；
By all data packet groups at data block；
The data block is encoded into the coding packet of predetermined number based on fountain codes, sends receiving end for coding packet.
7. data transmission method according to claim 6, which is characterized in that obtain the data transmission fails rate and meet the
One preset condition, and the data delay time meets the size for the data block transmitted when the second preset condition, specifically includes:
The data transmission fails rate is less than preset threshold, and the data delay time is minimum value as constraint condition,
The quantity of the data packet is calculated；
Using the quantity of the data packet as the size for the data block transmitted.
8. a kind of data transmission system for underwater acoustic network, which is characterized in that described device include: memory, processor and
At least one is stored in the memory and is configured as the computer program executed by the processor, the computer
Program is configurable for data transmission method described in any one of perform claim requirement 1 to 7.
9. a kind of computer readable storage medium, which is characterized in that be stored with computer in the computer readable storage medium
Program, the computer program can be executed by processor to realize the transmission side data as described in any one of claims 1 to 7
Method.
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| CN114268677A (en) * | 2021-12-28 | 2022-04-01 | 厦门安胜网络科技有限公司 | Data transmission method and system based on weak network environment |
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