CN110299973A - A kind of method of reseptance and device of data scrolling transmission - Google Patents
A kind of method of reseptance and device of data scrolling transmission Download PDFInfo
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- CN110299973A CN110299973A CN201810246777.4A CN201810246777A CN110299973A CN 110299973 A CN110299973 A CN 110299973A CN 201810246777 A CN201810246777 A CN 201810246777A CN 110299973 A CN110299973 A CN 110299973A
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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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
- H04L1/1642—Formats specially adapted for sequence numbers
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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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1832—Details of sliding window management
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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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1835—Buffer management
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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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1864—ARQ related signaling
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Communication Control (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The present invention provides the method for reseptances and device of a kind of transmission of data scrolling, this method comprises: presetting S cache unit, and to S cache unit number consecutively；Transmission data packet is received, transmission data packet includes the number of each data packet for the transmission data packet that Q data packet, transmission packet check value and kth time are sent, wherein the packet header of each data packet includes at least the number of data packet；Obtain each data packet for the transmission data packet that kth time is sent；The data of each data packet for the transmission data packet that data and kth time to Q data packet are sent carry out verification transmission packet are calculated verifying comparison value；Compare transmission packet check value and transmission packet verification comparison value, if consistent, then successively judge whether had data packet in the corresponding cache unit of the number of Q data packet, storage numbers corresponding data packet with it in the cache unit of no deposit data packet, abandons the corresponding data packet of number for the cache unit for being stored with data packet.
Description
Technical field
The present invention relates to method of reseptances and device that a kind of electronic technology field more particularly to a kind of data scrolling transmit.
Background technique
In existing network data transmission, transport layer one data packet of every transmission, receiving end is to the number having had successfully received
Corresponding ACK (Acknowledgement confirms a character) response is returned according to packet；If transmitting terminal is when reasonable round-trip
Prolong in (Round-Trip Time, be abbreviated as RTT) and do not receive the acknowledgement character response, then corresponding data packet is assumed to lose
Mistake will be retransmitted.Under existing communications protocol, required after transmitting terminal one data packet of every transmission etc. waiting
The acknowledgement character response that receiving end is sent could continue to send next data packet, transmitting terminal and receiving end will once data interaction,
Although reliability is stronger, efficiency of transmission is lower.Moreover, will cause data in the case where network condition is bad and repeatedly retransmit,
Use unstable, waste Internet resources.
Summary of the invention
One of present invention seek to address that the above problem/.
The main purpose of the present invention is to provide a kind of sending methods of data scrolling transmission.
Another object of the present invention is to provide a kind of sending devices of data scrolling transmission.
Another object of the present invention is to provide a kind of method of reseptances of data scrolling transmission.
Another object of the present invention is to provide a kind of reception devices of data scrolling transmission.
In order to achieve the above objectives, technical solution of the present invention is specifically achieved in that
One aspect of the present invention provides a kind of sending method of data scrolling transmission, comprising: message to be transmitted is obtained, it is described
Message to be transmitted by N number of data packet group at；To N number of data packet number consecutively, the packet header of each data packet, which includes at least, is
Its number distributed；Determine the length of transmission data window, the length of the transmission data window is for determining a transmission number
It is positive integer, M≤N in packet according to the number M, M, N for the data packet for including；The message to be transmitted: A.i is sent according to the following steps
=1, wherein i is the number for sending current transmission data packet, and the value of i is 1,2,3 ..., N-M+1；B. by the transmission number
It is placed according to the initial position of window at the data packet that number is i；It is pending that i-th is selected according to the length of the transmission data window
The transmission data packet sent, i-th transmission data packet to be sent include the M data packet that number is i to i+M-1；C. right
The each data packet for the transmission data packet that the data and kth time of M data packet of i-th transmission data packet to be sent receive
Data carry out verification transmission packet check value be calculated, and send i-th transmission data packet to be sent, wherein institute
State i-th transmission data packet to be sent further include: the transmission packet check value and the secondary transmission data packet received of the kth
Each data packet number, k is positive integer；D. judge whether i+1 is less than or equal to N-M+1, if it is, i=i+1, is returned
Return step B；If it is not, then the message to be transmitted is sent.
Optionally, after sending i-th transmission data packet to be sent, the method also includes: receive weight
Request is passed, the retransmission request includes at least the number n of data packet to be retransmitted, wherein n≤i；By the transmission data window
Initial position be placed in number be n data packet at；According to the selected transmission number to be retransmitted of length of the transmission data window
According to packet, n-th transmission data packet to be sent includes the M data packet that number is n to n+M-1, and is sent described to weight
The transmission data packet of biography.
Optionally, the message to be transmitted is UDP message, and before the acquisition message to be transmitted, the method is also wrapped
It includes: the message to be transmitted is divided by N number of data packet according to preset strategy.
Optionally, i-th transmission data packet to be sent further include: UDP puppet stem and UDP stem；The UDP is first
Portion include: verification and；Before transmission i-th transmission data packet to be sent, the method also includes: according to institute
The data for stating UDP puppet stem, UDP stem and M data packet in i-th transmission data packet to be sent are calculated
It is described verification and.
Another aspect of the present invention provides a kind of sending device of data scrolling transmission, comprising: module is obtained, for obtaining
Message to be transmitted, the message to be transmitted by N number of data packet group at；Data packet handing module, for N number of data packet according to
Secondary number, the packet header of each data packet include at least the number for its distribution；Data window configuration module is transmitted, is passed for determining
The length of transmission of data window, the length of the transmission data window are used to determine the data packet for including in a transmission data packet
Number M, M, N are positive integer, M≤N；Sending module, for sending the message to be transmitted: A.i=1 according to the following steps,
In, i is the number for sending current transmission data packet, and the value of i is 1,2,3 ..., N-M+1；B. by the transmission data window
Initial position be placed in number be i data packet at；I-th biography to be sent is selected according to the length of the transmission data window
Transmission of data packet, i-th transmission data packet to be sent include the M data packet that number is i to i+M-1；C. i-th is waited for
The data of each data packet for the transmission data packet that the data and kth time of M data packet of the transmission data packet of transmission receive
It carries out verification and transmission packet check value is calculated, and send i-th transmission data packet to be sent, wherein the i-th
Transmission data packet to be sent further include: the transmission data packet that the transmission packet check value and the kth time receive it is each
The number of data packet, k are positive integer；D. judge whether i+1 is less than or equal to N-M+1, if it is, i=i+1, return step
B；If it is not, then the message to be transmitted is sent.
Optionally, device further include: receiving module, in which: the receiving module, it is described for receiving retransmission request
Retransmission request includes at least the number n of data packet to be retransmitted, wherein n≤i；The sending module is also used to the transmission
The initial position of data window is placed at the data packet that number is n；Length according to the transmission data window is selected wait retransmit
Transmission data packet, the transmission data packet to be retransmitted include number be n to n+M-1 M data packet, and send described in
The transmission data packet of re-transmission.
Optionally, the device further include: message processing module (MPM), for the message to be transmitted to be drawn according to preset strategy
It is divided into N number of data packet.
Optionally, i-th transmission data packet to be sent further include: UDP puppet stem and UDP stem；The UDP is first
Portion include: verification and；The data packet handing module is also used to according to the UDP puppet stem, UDP stem and the i-th
The data of M data packet of transmission data packet to be sent be calculated it is described verification and.
Another aspect of the present invention provides a kind of method of reseptance of data scrolling transmission, comprising: it is single to preset S caching
Member, and to the S cache unit number consecutively, wherein a cache unit is for storing a data packet；Receive transmission number
According to packet, the transmission data packet includes each number for the transmission data packet that Q data packet, transmission packet check value and kth time are sent
According to the number of packet, wherein the packet header of each data packet includes at least the number of data packet, and k, S, Q are positive integer, Q≤S, k < S；
The number of each data packet of the transmission data packet sent according to the kth time obtains the transmission data packet that the kth time is sent
Each data packet；The number of each data packet for the transmission data packet that data and the kth time to the Q data packet are sent
The transmission packet verification comparison value that the transmission data packet is calculated according to verification is carried out；Compare the transmission packet check value and described
Transmission packet verification comparison value successively judges that the corresponding caching of the number of the Q data packet is single if unanimously, verification passes through
Whether it is stored with data packet in member, storage numbers corresponding data with it in the cache unit of no storing data packet
Packet abandons the corresponding data packet of number for the cache unit for being stored with data packet.
Optionally, after receiving transmission data packet, the method also includes: judge whether to meet n1=n2+ 1, wherein
N1 is the smallest number in the number of the Q data packet, n2It is minimum in the number of the cache unit of no storing data packet
Number；It include the volume of the data packet of request retransmission in the retransmission request if it is satisfied, then sending retransmission request to transmitting terminal
Number n2。
Optionally, the transmission data packet further include: UDP puppet stem and UDP stem；The UDP stem includes: verification
With；After receiving the transmission data packet, numbered pair in described stored in the cache unit of no storing data packet with it
Before the data packet answered, the method also includes: according to the UDP puppet stem, the UDP stem and the Q data packet
Be calculated it is described transmission data packet Inspection and；Compare it is described transmission data packet verification and with Inspection and, such as
Fruit is consistent, then verification passes through, and executes the storage in the cache unit of no storing data packet with it and numbers corresponding data
The step of packet.
Another aspect of the present invention provides a kind of reception device of data scrolling transmission, comprising: S cache unit, processing
Module, receiving module and control module, in which: the processing module, for the S cache unit number consecutively, wherein
One cache unit is for storing a data packet；The receiving module, for receiving transmission data packet, the transmission data packet
The number of each data packet of transmission data packet including Q data packet, transmission packet check value and kth time transmission, wherein each
The packet header of data packet includes at least the number of data packet, and k, S, Q are positive integer, Q≤S, k < S；The control module is used for basis
The number of each data packet for the transmission data packet that the kth time is sent obtains each of the transmission data packet that the kth time is sent
A data packet；The data of each data packet for the transmission data packet that data and the kth to the Q data packet time are sent into
The transmission packet verification comparison value of the transmission data packet is calculated in row verification；Compare the transmission packet check value and the transmission
Packet verification comparison value successively judges in the corresponding cache unit of number of the Q data packet if unanimously, verification passes through
Whether data packet has been stored with, storage numbers corresponding data packet with it in the cache unit of no storing data packet, loses
Abandon the corresponding data packet of number for the cache unit for being stored with data packet.
Optionally, device further include: sending module, in which: the control module is also used to judge whether to meet n1=
n2+ 1, wherein n1For the smallest number in the number of the Q data packet, n2For the volume of the cache unit of no storing data packet
The smallest number in number；Retransmission request is sent to transmitting terminal if it is satisfied, then controlling the sending module；The sending module,
It include the number n of the data packet of request retransmission in the retransmission request for sending the retransmission request to the transmitting terminal2。
Optionally, the transmission data packet further includes UDP puppet stem and UDP stem；The UDP stem include: verification and；
The control module is also used to be calculated according to the UDP puppet stem, the UDP stem and the Q data packet described
Transmit data packet Inspection and；Compare it is described transmission data packet Inspection and and verification and, if unanimously, verified
Pass through, executes described the step of storage numbers corresponding data packet with it in the cache unit of no storing data packet.
As seen from the above technical solution provided by the invention, the present invention provides a kind of receptions of data scrolling transmission
Method and device, by the way that data packet and cache unit reference numeral, same data packet can repeat to receive repeatedly, by data packet
It is stored in corresponding cache unit according to number, when some data packet generates error of transmission either packet loss in transmission process
The phenomenon that when, due to can also repeat receive repeatedly, can be reduced to the full extent to avoid the packet loss of the data packet
The probability of repeating transmission.In addition, receiving end can not return to acknowledgement character response in transmission process, transmitting terminal also withouts waiting for receiving end
The acknowledgement character response of return, it is possible to reduce the interaction of transmitting terminal and receiving end, the efficiency of improve data transfer, while can also reduce
The packet loss risk that does not need interaction feedback and may cause.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the flow chart of the sending method for the data scrolling transmission that the embodiment of the present invention 1 provides；
Fig. 2 is the form schematic diagram in the packet header for the data packet that the embodiment of the present invention 1 provides；
Fig. 3 is the schematic diagram that the transmission data window that the embodiment of the present invention 1 provides determines a transmission data packet；
Fig. 4 is the form schematic diagram that the UDP that the embodiment of the present invention 1 provides transmits data packet；
Fig. 5 is the flow chart of the method for reseptance for the data scrolling transmission that the embodiment of the present invention 2 provides；
Fig. 6 is the structural schematic diagram for the data transmission system that the embodiment of the present invention 3 provides；
Fig. 7 is the structural schematic diagram of the sending device for the data scrolling transmission that the embodiment of the present invention 3 provides；
Fig. 8 is the structural schematic diagram of the reception device for the data scrolling transmission that the embodiment of the present invention 3 provides.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on this
The embodiment of invention, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, belongs to protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply opposite
Importance or quantity or position.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
The embodiment of the present invention is described in further detail below in conjunction with attached drawing.
Embodiment 1
Present embodiments provide a kind of sending method of data scrolling transmission.As shown in Figure 1, the hair of data scrolling transmission
Delivery method includes the following steps (S101-S104):
S101, obtain message to be transmitted, message to be transmitted by N number of data packet group at；
In the present embodiment, message to be transmitted can be ICP/IP protocol message, be also possible to User Datagram Protocol
(User Datagram Protocol, be abbreviated as UDP) message.Wherein, which can be divided into N number of data
Packet, N is positive integer.
In existing UDP transport protocol, udp protocol is open system interconnection (Open System
Interconnection is abbreviated as OSI) a kind of connectionless transport layer protocol in reference model, simple insecure letter is provided
Breath transmission service.It is used to handle UDP message packet as ICP/IP protocol in a network.But UDP do not provide data packet grouping,
Assembling cannot be ranked up data packet, that is to say, that be that can not learn whether it is safe and complete after data packet is sent
It reaches.Udp protocol not can guarantee data packet can accurately be sent to receiving end, and receiving end is not needed to receiving yet
UDP message is confirmed.In the present embodiment, when message to be transmitted is UDP message, as an alternative embodiment,
Before obtaining message to be transmitted, method provided in this embodiment further include: message to be transmitted is divided by N according to preset strategy
A data packet.For example, a data package size is arranged in the maximum capacity for the data packet that can be allowed to transmit according to network, this is waited for
Transmitting message is divided.In another example the numerical value of N can be set, 100 are such as set as, which is divided into 100
The identical data packet of size.It is carried out in another example treating transmitting message according to preset algorithm in conjunction with the current stability state of network
It divides.The division mode that the present embodiment treats transmitting message is not specifically limited, as long as may be implemented to divide message to be transmitted
For multiple data packets, the transmission of data message is completed in a manner of sending data packet.
S102, to N number of data packet number consecutively, the packet header of each data packet includes at least the number for its distribution；
In the present embodiment, get by N number of data packet group at message to be transmitted after, to N number of data packet number consecutively,
The number of N number of data packet is followed successively by 1,2 ..., N sends in order to carry out the iteration of data packet by number, realizes one
The multiple transmission of data packet reduces the probability of repeating transmission, and reduces and do not need interaction feedback in transmission process and may cause
Packet loss risk, the efficiency of improve data transfer.
In the present embodiment, when message to be transmitted is UDP message, different and existing UDP transport protocol, the present embodiment will
UDP message to be transmitted carries out data packet subpackage, and is each UDP message packet distribution number, using middle step S104 as follows
Described in mode send UDP message to be transmitted.In the present embodiment, receiving end do not need to the UDP message packet received into
Row confirmation, but since the same UDP message packet can repeat to send repeatedly, it thereby may be ensured that data packet can be accurately sent to
Receiving end reduces the probability of repeating transmission.
One data packet includes packet header and data, wherein the number for the allocation of packets, the volume are included at least in packet header
Number the data packet can be identified according to the number with the unique identification data packet, transmitting terminal and receiving end, for example, receiving end
Can be in the number for carrying the data packet being not received by into the repeating transmission request that transmitting terminal is sent, transmitting terminal can be according to the volume
Number retransmit corresponding data packet.As a kind of optional mode, the format in packet header is as shown in Fig. 2, packet header may include: source
Mouth, destination port, number, data packet length and check value.Packet header shown in Fig. 2 is a kind of optional embodiment, according to
Specifically need packet header that can increase or decrease corresponding contents.
S103, the length for determining transmission data window transmit the length of data window for determining a transmission data packet
In include the number M, M of data packet be positive integer, M≤N；
In the present embodiment, transmitting terminal once sends a transmission data packet, until the N number of number for the message to be transmitted that will acquire
Until all having been sent according to packet.The number M for the data packet that each transmission data packet includes is true by the length of transmission data window
Fixed, the data packet of transmission data window covering, i.e. data packet in window are that this needs to wrap in the transmission data packet sent
The M data packet contained.The number of M can be needed according to the ability and present data transmission that network capacity can carry
Guarantee stability height to determine.M value is bigger, then higher to network transmission requirement, then packet loss is lower.As a kind of optional side
Formula, each number for transmitting M data packet in data packet is incremented by successively, for example, M=3, the 1st number transmitted in data packet
Number according to packet is that the number of the data packet in the 1,2,3, the 2nd transmission data packet is 2,3,4 ... ... until the last one transmission
The number of data packet is N-2, N-1, N.After every primary transmission data packet of transmission, window floats once backward.Fig. 3 is exemplarily only
The schematic diagram that transmission data window determines a transmission data packet is given, the packet header of each data packet includes at least data packet
Number, message to be transmitted includes the data packet of N number of number consecutively.Certainly, the number of M data packet is also successively successively decreased.Alternatively, every
After sending primary transmission data packet, transmission data window can float forward once.As long as iteration, which may be implemented, sends data packet
?.
S104, message to be transmitted is sent according to the following steps:
A.i=1, wherein i is the number for sending current transmission data packet, and the value of i is 1,2,3 ..., N-M+1；
When i=1, indicate currently to transmit data packet for the 1st transmission.Since message to be transmitted has N number of data packet, so,
It needs to send N-M+1 transmission data packet in total, n-th data packet could have been sent.
B. the initial position for transmitting data window is placed in and is numbered at the data packet for i；According to the length of transmission data window
Selected i-th transmission data packet to be sent is spent, i-th transmission data packet to be sent includes M that number is i to i+M-1
Data packet；
C. the transmission data packet that the data of M data packet of the transmission data packet to be sent to i-th and kth time receive
The data of each data packet carry out verification transmission packet check value be calculated, and send i-th transmission data packet to be sent,
Wherein, i-th transmission data packet to be sent further include: the transmission data packet that transmission packet check value and kth time receive it is each
The number of a data packet, k are positive integer；
As shown in figure 3, the initial position for transmitting data window is placed at the data packet that number is 1 as i=1.For example, M
=3, then the 1st transmission data packet to be sent includes the data packet that number is 1,2,3.As i=2, data window is transmitted
Initial position is placed at the data packet that number is 2, then the 2nd transmission data packet to be sent includes the data that number is 2,3,4
Packet.As i=3, the initial position for transmitting data window is placed at the data packet that number is 3, then the 2nd transmission number to be sent
It include the data packet that number is 3,4,5 according to packet.It can be seen that in i=3, the data packet that number is 3 has been transmitted across 3 times, directly
To i=N-M+1, that is, data packet of the number from M to N-M+1 is all repeated to be transmitted across M times.So by changing to data packet
In generation, sends, when some data packet generates error of transmission or when the phenomenon that packet loss in transmission process, due to can also be again
It repeats to send M-1 times, can be reduced to the full extent to avoid the packet loss of the data packet, also there is no need to retransmit the data packet
The probability of data packet retransmission.In the present embodiment, receiving end can not return to acknowledgement character response, transmitting terminal in transmission process
Without waiting for the acknowledgement character response of receiving end return, it is possible to reduce the interaction of transmitting terminal and receiving end, the effect of improve data transfer
Rate, while the packet loss risk that does not need interaction feedback and may cause can also be reduced.
In the present embodiment, transmitting terminal equally also can receive the transmission data packet of receiving end (opposite end of transmitting terminal) transmission,
For example, the transmission data packet that kth time receives is what receiving end was sent.Therefore, as a kind of optional mode, transmitting terminal can
With the number of each data packet of each data packet of transmission data packet and transmission data packet to be sent that are received based on oneself
According to being calculated a check value (i.e. transmission packet check value), and receiving end is in the transmission data packet for receiving transmitting terminal transmission
It afterwards, can be according to transmission data packet that above-mentioned transmitting terminal kth time receives (and transmission data that receiving end was once transmitted across
Packet) the number of each data packet inquire certain transmission data packet for sending of receiving end, then the biography that receives of receiving end utilization
The data of transmission of data packet and the transmission data packet itself being transmitted across (i.e. transmitting terminal kth time receive transmission data packet) it is each
A transmission packet Inspection value is calculated in the data of a data packet, is compared with the transmission packet check value received.This
In embodiment, transmitting terminal, which participates in calculating check value using the data of the transmission data packet received, can increase the stability of verification
And accuracy.For example, distorted if the transmitting terminal received transmission data packet of kth time is kidnapped by third party, what transmitting terminal calculated
Transmission packet check value and recipient receive the transmission packet Inspection value being calculated after the transmission data packet that transmitting terminal is sent
It is different, then verification can not pass through, and thus receiving end is known that packet loss, wrong packet has occurred or is kidnapped by third party and distorts
Risk, and then take corresponding safeguard procedures.Likewise, if this transmission data packet sent of transmitting terminal is robbed by third party
It holds or distorts, receiving end, which equally verifies, to be passed through.Therefore, transmitting terminal participates in meter using the data of the transmission data packet received
The stability and accuracy of verification can be increased by calculating check value, so as to more steadily guarantee the integrality and peace of data packet
Quan Xing.Specific verification computational algorithm the present embodiment and with no restrictions, for example, even-odd check or cyclic redundancy school can be used
It tests (Cyclic Redundancy Check, be abbreviated as CRC) scheduling algorithm and transmission packet check value is calculated.It is carried by sending
There is the transmission data packet of the transmission packet check value, receiving end can use corresponding algorithm pair after receiving transmission data packet
Transmission data packet is verified, to guarantee the integrality and safety (being not tampered with) of the transmission data packet received.
This implementations of algorithm and with no restrictions of transmission packet check value is calculated, such as parity arithmetic or CRC algorithm etc. can be used
Deng.
D. judge whether i+1 is less than or equal to N-M+1, if it is, i=i+1, return step B；If it is not, then to
Transmitting message is sent.
In the present embodiment, from i=1 until i=N-M+1 sends N-M+1 transmission data packet, every primary transmission of transmission in total
Data packet, transmission data window float once backward, and in the N-M+1 times transmission data packet, the data packet that number is N-M+1 is
It is transmitted across M times.The data packet that number is N is contained in the N-M+1 times transmission data packet, then it is assumed that message to be transmitted has been sent
Finish.
In the present embodiment, data packet check value can also be carried in the packet header of each data packet, so as to receiving end according to
Above-mentioned check value carries out integrality and security verification to the data packet received.As the optional implementation of one of the present embodiment
Mode, the check value (as shown in Figure 2) in the packet header of each data packet may include: data packet check value；It is sent out in step S104
Before sending message to be transmitted, method provided in this embodiment further include: calculate the number of each data packet one of in the following manner
According to packet check value: the data of number and data packet to data packet carry out verification and data packet check value are calculated；Alternatively, logarithm
Verification is carried out according to the data of packet, and data packet check value is calculated.
The mode of a variety of check values for calculating data packet is provided in the present embodiment, it can to the number sum number of data packet
According to carrying out verification calculating, can also the data to data packet carry out verification calculating, the data of each data packet are finally calculated
Packet check value.Specific verification computational algorithm the present embodiment and with no restrictions, for example, using even-odd check or can recycle superfluous
The check value of data packet is calculated in remaining verification (Cyclic Redundancy Check, be abbreviated as CRC) scheduling algorithm.Pass through hair
The data packet for carrying the check value is sent, receiving end can use corresponding after receiving the data packet in transmission data packet
Algorithm verifies data packet, to guarantee the integrality and safety (being not tampered with) of the data packet received.
In addition, in the present embodiment, although the probability of re-transmission can be substantially reduced using iterative manner transmission data packet,
Still there is the case where packet loss or wrong packet, for this purpose, after sending i-th transmission data packet to be sent, this implementation
The method that example provides further include: transmitting terminal receives the retransmission request of opposite end transmission, and retransmission request includes at least number to be retransmitted
According to the number n of packet, wherein n≤i；The initial position for transmitting data window is placed in and numbers at the data packet for n by transmitting terminal, presses
According to the selected transmission data packet to be retransmitted of length of transmission data window, transmission data packet to be retransmitted includes that number is n to n+
The M data packet of M-1, and send transmission data packet to be retransmitted.Herein transmitting terminal send the mode of data packet to be retransmitted with
Step B, C in step S104 be it is similar, be referred to the description of step B, C in step S104.
In the present embodiment, as described above, message to be transmitted can be ICP/IP protocol message, it is also possible to UDP message.
When message to be transmitted is UDP message, by taking the 1st UDP transmission data packet of transmission as an example, UDP transmits format such as Fig. 4 of data packet
It is shown, include M data packet (data packet format refers to Fig. 2) in the data portion of a UDP transmission data packet, is with M=3
Example, M data block are joined together to form the data portion in a UDP transmission data packet messages packet according to numeric order.It removes
Except this, a UDP transmission data packet further includes UDP stem and UDP puppet stem, wherein UDP stem occupies 8 bytes, respectively
Be occupy 2 bytes source port, destination port, length and verification and, UDP puppet stem occupy 12 bytes.As one kind
Optional embodiment, before sending i-th transmission data packet to be sent, method provided in this embodiment further include: root
Verification is calculated according to the data of M data packet of UDP puppet stem, UDP stem and i-th transmission data packet to be sent
The integrality and safety of UDP transmission data packet can be verified with, the verification and further, improve the stability of verification result
And accuracy.
The sending method of above-mentioned data scrolling transmission provided in this embodiment, by being pressed to data packet to package number
It is sent according to number iteration, when some data packet generates error of transmission or when the phenomenon that packet loss in transmission process, due to
It can also repeat to send M-1 times, the probability of repeating transmission can be reduced to the full extent to avoid the packet loss of the data packet.In addition,
Receiving end can not return to acknowledgement character response in transmission process, and transmitting terminal also withouts waiting for the acknowledgement character response of receiving end return, can
Interaction feedback is not needed to reduce the interaction of transmitting terminal and receiving end, the efficiency of improve data transfer, while can also reduce and
The packet loss risk that may cause.And pass through the transmission of several check values mentioned above, it is ensured that the integrality of data packet
And safety.
Embodiment 2
Present embodiments provide a kind of method of reseptance of data scrolling transmission.The method of reseptance and reality of data scrolling transmission
The sending method for applying the data scrolling transmission provided in example 1 is corresponding.As shown in figure 5, the method for reseptance packet of data scrolling transmission
Include following steps (S201-S205):
S201, S cache unit is preset, and to S cache unit number consecutively, wherein a cache unit is used
In one data packet of storage；
In this implementation, for N number of data packet of message to be transmitted in storage implementation example 1, receiving end pre-sets S and delays
Memory cell, S are positive integer, and should be greater than or equal to N.Receiving end in advance to S cache unit number consecutively 1,2 ... S,
The number of top n cache unit in the S cache unit is corresponded with the number of N number of data packet, and a cache unit is used
In one data packet of storage, and data packet can only be stored and be numbered in corresponding cache unit with it.It can guarantee to connect in this way
Receiving end only saves the corresponding data packet of number of the cache unit of no storing data packet, for being repeated as many times the data packet received
It can abandon, so as to improve the working efficiency of receiving end.
S202, transmission data packet is received, transmission data packet includes that Q data packet, transmission packet check value and kth time are sent
Transmit the number of each data packet of data packet, wherein the packet header of each data packet includes at least the number of data packet, k, S, Q
For positive integer, Q≤S, k < S；
The transmission data packet that receiving end receives is with the format of the transmission data packet of transmitting terminal transmission in embodiment 1 and each
The format of data packet be it is identical, specifically may refer to the description in embodiment 1.According to being sent in step S104 in embodiment 1
The mode of message to be transmitted, receiving end also will receive multiple (such as N-M+1 times) transmission data packet, and each transmission data packet includes Q
A data packet.For each data packet, can also repeat to receive multipass (such as M times), due to including number in the packet header of each data packet
According to the number of packet, therefore, according to the number can identify the data packet whether attach most importance to multiple connection receive, can also be found according to the number
Corresponding cache unit, the step of whether data packet being stored in the cache unit in order to subsequent execution.
S203, the transmission number that kth time is sent is obtained according to the number of each data packet of the transmission data packet of kth time transmission
According to each data packet of packet；
S204, the transmission data packet that the data and kth time of Q data packet are sent the data of each data packet carry out school
Test the transmission packet verification comparison value that transmission data packet is calculated；
In the present embodiment, likewise, corresponding with the transmitting terminal calculating mode of check value, receiving end also uses identical side
Formula and algorithm calculate verification comparison value, and the concrete mode and algorithm for calculating transmission packet verification comparison value are referred to embodiment
The description of transmission packet check value is calculated in 1.
Wherein, the transmission data packet that kth time is sent can be the transmission data packet of receiving end last time transmission, be also possible to
The preceding transmission data packet sent several times, since the data packet that transmitting terminal is the transmission data packet sent based on this k times is calculated
Packet check value is transmitted, transmission packet verification is calculated in the data packet for the transmission data packet that receiving end is similarly sent based on this k times
Comparison value, in this way verification will pass through, still, if the data or volume of each data packet of the transmission data packet of this k times transmission
Number kidnapped and to distort by third party, then receiving end verification can not just pass through, thus receiving end be known that have occurred packet loss, wrong packet or
Person is kidnapped the risk distorted by third party, and then takes corresponding safeguard procedures.Therefore, receiving end has been transmitted across using oneself
The data of transmission data packet participate in calculating verification comparison value and can increase the stability and accuracy of verification, so as to more
Steadily guarantee the integrality and safety of data packet.
S205, it compares transmission packet check value and transmits and wrap verification comparison value, if unanimously, verification passes through, successively judge Q
Whether it is stored with data packet in the corresponding cache unit of the number of a data packet, in the cache unit of no storing data packet
Middle storage numbers corresponding data packet with it, abandons the corresponding data packet of number for the cache unit for being stored with data packet.
The number of Q data packet transmitted in data packet is serial number, such as 1,2,3,4,5, can according to number according to
It is secondary to inquire in corresponding cache unit (number is also 1,2,3,4,5) whether be stored with data packet.Since transmitting terminal is with repeatedly
The mode in generation sends data packet, so, the same data packet receiving end can be repeated as many times and received, if in cache unit
It has been stored with the data packet, has illustrated to receive, then has abandoned the data packet, if not storing the number in cache unit
According to packet, explanation may be the case where receiving for the first time or packet loss has occurred, then to store the data packet, pass through same number as a result,
It can repeatedly be received according to packet, can overcome the problems, such as packet loss to the full extent.Moreover, receiving end is receiving in the present embodiment
Without returning to acknowledgement character response to transmitting terminal after data packet, reduces the interaction between transmitting terminal and receiving end, data biography can be improved
Defeated efficiency.
In the way of sending message to be transmitted in step S104 in embodiment 1, receiving end also will receive multiple (such as N-M+
1 time) transmission data packet, to receive complete message to be transmitted.Above only to how being grasped after receiving a transmission data packet
It is described, but for any one transmission data packet that receiving end receives, receives and the mode of storage all may be used
It is operated by according in a manner of described in step S202-S205.
In the present embodiment, data packet check value can also be carried in the packet header of each data packet, is verified using data packet
Value carries out verification comparison, to guarantee the integrality and safety of data packet.As the optional embodiment party of one of the present embodiment
Formula, the packet header of each data packet further include data packet check value；After step S202 receives transmission data packet, in step S205
In in the cache unit of no storing data packet storage number corresponding data packet with it before, method provided in this embodiment
Further include: the data packet for calculating each data packet one of in the following manner verifies comparison value: to the number and data of data packet
The data of packet carry out verification and data packet verification comparison value are calculated；It is calculated alternatively, carrying out verification to the data of data packet
Data packet verifies comparison value；The data packet check value and data packet verification comparison value for comparing each data packet, if each data
The data packet check value of packet and data packet verification comparison value are consistent, then verification passes through, and execute in the slow of no storing data packet
The step of storage numbers corresponding data packet with it in memory cell.
Corresponding with the transmitting terminal calculating mode of check value, receiving end also calculates verification ratio using mode identical with transmitting terminal
To value, for example, transmitting terminal, which carries out verification to the number and data of data packet, is calculated data packet check value, then receiving end
Number and data to data packet carry out verification and data packet verification comparison value are calculated.Meanwhile using identical with transmitting terminal
Algorithm carries out the data packet verification comparison value that each data packet is calculated in verification to data packet, for example, transmitting terminal uses odd even
Checking algorithm calculates, then, receiving end also uses parity arithmetic to calculate.Specifically, it may refer to retouching in embodiment 1
It states.
In the present embodiment, receiving end can use corresponding with transmitting terminal after receiving the data packet in transmission data packet
Algorithm data packet is verified, to guarantee that the integrality of data packet received and safety (are not tampered with
It crosses).
In addition, in two kinds of verifications (dual school of the verifying to data packet check value and the verifying to transmission packet check value
Test) pass through after, just execute storing data packet the step of, as long as have it is a kind of verification do not pass through, do not execute subsequent step, thus
The safety that can more guarantee data transmission, further ensures that the integrality and safety of the data packet for being stored in cache unit
Property.
In addition, in the present embodiment, although the probability of re-transmission can be substantially reduced using iterative manner transmission data packet,
Still there is the case where packet loss or wrong packet, for this purpose, in the present embodiment, after step S202 receives transmission data packet,
It while executing step S203-S205, can also identify whether the data packet of re-transmission in need, initiate to retransmit to transmitting terminal and ask
It asks.Specifically, after receiving transmission data packet, method provided in this embodiment further include: judge whether to meet n1=n2+ 1,
Wherein, n1The smallest number, n in number for Q data packet2It is minimum in the number of the cache unit of no storing data packet
Number；It include the number of the data packet of request retransmission in retransmission request if it is satisfied, then sending retransmission request to transmitting terminal
n2.For example, numbering the cache unit (the smallest number) for being 2, there are no storing data packets, but the Q of the transmission data packet received
The number of a data packet is 3,4,5.Illustrate that the initial position of the data transmission window mouth of transmitting terminal has floated to the data of number 3
The position of packet, in the way of floating backward, sending transmission data packet next time will send since the data packet of number 4, no
The data packet of number 2 can be retransmited.And at this point, number be 2 cache unit again without the data packet for receiving reference numeral,
So, such case (n is being identified in receiving end1=n2+ 1) it after, then requests to send the last transmission data sent to transmitting terminal
Wrap (number n2), i.e., transmission data window originates determining transmission data packet from number 2, and therefore, receiving end is in retransmission request
In carry no storing data packet cache unit number in the smallest number, with indicate transmitting terminal retransmit which transmission number
According to packet.This mode for recognizing the need for retransmit provided in this embodiment can reduce the number of re-transmission, that is, simply request re-transmission
Once number the smallest data packet, and can when the data transmission window mouth of transmitting terminal floats to the latter of the smallest number,
It initiates to retransmit at once, guarantees the integrality of data in time.
Certainly, the mode that above-mentioned initiation provided in this embodiment retransmits is only a kind of preferred mode, and receiving end can also be with
Do not judge whether to meet n1=n2+1.For example, as another optional embodiment, it can be determined that whether there is cache unit
Number miLess than n1, miFor less than n1Each cache unit number, miValue is positive integer, and then wraps in retransmission request
Number m containing each cache uniti(such as m1=1, m2=3 ..., m100=200).Wherein, receiving end can receive
Each transmission data packet is judged, or is judged after receiving multiple transmission data packets, these numbers of request retransmission
Corresponding data packet.
In the present embodiment, as described in example 1 above, message to be transmitted can be ICP/IP protocol message, be also possible to
UDP message.When message to be transmitted is UDP message, the format of a UDP transmission data packet is as shown in figure 4, a UDP transmission
In the data portion of data packet include Q data packet (data packet format refers to Fig. 2), for example, Q=3, Q data blocks according to
Numeric order is joined together to form the data portion in a UDP transmission data packet messages packet.In addition, transmission data packet is also wrapped
Include UDP puppet stem and UDP stem；UDP stem include: verification and.As an alternative embodiment, transmitting data receiving
After packet, before storage numbers corresponding data packet with it in the cache unit of no storing data packet, the present embodiment provides
Method further include: according to the data of UDP puppet stem, UDP stem and Q data packet be calculated transmission data packet comparison
Verification and；It compares the Inspection for transmitting data packet and and verifies and if unanimously, verification passes through, execute and do not storing
The step of storage numbers corresponding data packet with it in the cache unit of data packet.Pass through the verifying to the verification sum, Ke Yijin
One step demonstrate,proves the integrality and safety of UDP transmission data packet, improves the stability and accuracy of verification result.
In addition, data cached buffer area is stored as an alternative embodiment, can also be arranged in the present embodiment,
After transmitting data packet deposit cache unit, performs corresponding processing, be then transferred to buffer area, the data packet in buffer area can be defeated
It is out or called (broadcastings of such as audio and video streams).Wherein, as an alternative embodiment, the size of buffer area can
It is calculated with the processing time for handling a data packet according to network delay and cache unit, for example, receiving end is to transmitting terminal
Network delay detection packet is sent, network delay T1 is calculated according to the response time of transmitting terminal returning response packet；A number will be handled
Caching process time delay T2 is calculated multiplied by the number S of cache unit according to the time t of packet；When to network delay T1 and caching process
Prolong T2 and sum to obtain delay time T3, and delay time T3 is calculated divided by the time t of one transmission data packet of processing slow
Deposit the space size in area.This is only the specific example that the present embodiment provides, and the present embodiment does not limit technology buffer area
The mode of size, because that can also have different calculations according to the difference of wire data type.
The method of reseptance of above-mentioned data scrolling transmission provided in this embodiment, by being compiled to data packet and cache unit are corresponding
Number, same data packet can repeat to receive repeatedly, data packet is stored in corresponding cache unit according to number, when a certain number
When the phenomenon that error of transmission or packet loss are generated in transmission process according to packet, due to that can also repeat to receive repeatedly,
To the full extent the probability of repeating transmission can be reduced to avoid the packet loss of the data packet.In addition, receiving end can be in transmission process
Do not return to acknowledgement character response, transmitting terminal also withouts waiting for the acknowledgement character response of receiving end return, it is possible to reduce transmitting terminal and receiving end
Interaction, the efficiency of improve data transfer, while the packet loss risk that does not need interaction feedback and may cause can also be reduced.And
Pass through the verification mentioned above to several check values, it is ensured that the integrality and safety of data packet.
Embodiment 3
The present embodiment additionally provides a kind of data transmission system.As shown in fig. 6, the system includes the hair of data scrolling transmission
Send the reception device of device and data rolling transmission, wherein the sending device of data scrolling transmission can be applied to embodiment 1
The sending method of data scrolling transmission, specific structure is as shown in fig. 7, the reception device of data scrolling transmission can be applied to implement
The method of reseptance of the data scrolling transmission of example 2, specific structure are as shown in Figure 8.The sending device and reception dress of data scrolling transmission
The concrete function set may refer to the specific descriptions in Examples 1 and 2.The present embodiment only does simple description.
As shown in fig. 7, the sending device of data scrolling transmission includes:
Obtain module, for obtaining message to be transmitted, message to be transmitted by N number of data packet group at；
Data packet handing module is included at least for the packet header to N number of data packet number consecutively, each data packet as its point
The number matched；
Data window configuration module is transmitted, for determining the length of transmission data window, the length for transmitting data window is used
In the number M for determining the data packet for including in a transmission data packet, M, N are positive integer, M≤N；
Sending module, for sending message to be transmitted: A.i=1 according to the following steps, wherein i is to send current transmission number
According to the number of packet, the value of i is 1,2,3 ..., N-M+1；B., the initial position for transmitting data window is placed in the number numbered as i
At packet；I-th transmission data packet to be sent, i-th transmission number to be sent are selected according to the length of transmission data window
M data packet for being i to i+M-1 comprising number according to packet；C. the number of M data packet of the transmission data packet to be sent to i-th
Verification is carried out according to the data of each data packet of the transmission data packet received with kth time, and transmission packet check value is calculated, and
Send i-th transmission data packet to be sent, wherein i-th transmission data packet to be sent further include: transmission packet check value and
The number of each data packet for the transmission data packet that kth time receives, k is positive integer；D. judge whether i+1 is less than or equal to N-
M+1, if it is, i=i+1, return step B；If it is not, then message to be transmitted is sent.
As a kind of optional mode, the sending device of data scrolling transmission further include: receiving module, in which: receive
Module, for receiving retransmission request, retransmission request includes at least the number n of data packet to be retransmitted, wherein n≤i；Send mould
Block is also used to for being placed in the initial position for transmitting data window and number at the data packet for n；According to the length of transmission data window
Selected transmission data packet to be retransmitted, transmission data packet to be retransmitted includes the M data packet that number is n to n+M-1, and is sent
Transmission data packet to be retransmitted.
As a kind of optional mode, the sending device of data scrolling transmission further include: message processing module (MPM) is used for root
Message to be transmitted is divided into N number of data packet according to preset strategy.
As a kind of optional mode, i-th transmission data packet to be sent includes UDP puppet stem and UDP stem；UDP
Stem include: verification and；Data packet handing module is also used to according to UDP puppet stem, UDP stem and i-th biography to be sent
The data of M data packet of transmission of data packet be calculated verification and.
As shown in figure 8, the reception device of data scrolling transmission includes: S cache unit, processing module, receiving module
And control module, in which:
Processing module, for S cache unit number consecutively a, wherein cache unit is for storing a data
Packet；
Receiving module, for receiving transmission data packet, transmission data packet includes Q data packet, transmission packet check value and kth
The number of each data packet of the transmission data packet of secondary transmission, wherein the packet header of each data packet includes at least the volume of data packet
Number, k, S, Q are positive integer, Q≤S, k < S；
Control module, the number of each data packet of the transmission data packet for being sent according to kth time obtain kth time and send
Transmission data packet each data packet；The each data packet for the transmission data packet that data and kth time to Q data packet are sent
Data carry out verification be calculated transmission data packet transmission packet verification comparison value；Compare transmission packet check value and transmission packet school
Comparison value is tested, if unanimously, verification passes through, whether is successively judged in the corresponding cache unit of the number of Q data packet
It is stored with data packet, storage numbers corresponding data packet with it in the cache unit of no storing data packet, and discarding has been deposited
Contain the corresponding data packet of number of the cache unit of data packet.
As optional mode a kind of in the present embodiment, the sending device of data scrolling transmission further include: sending module；
Wherein: control module is also used to judge whether to meet n1=n2+ 1, wherein n1The smallest number in number for Q data packet,
n2For the smallest number in the number of the cache unit of no storing data packet；If it is satisfied, then controlling sending module to transmission
End sends retransmission request；Sending module includes the data of request retransmission in retransmission request for sending retransmission request to transmitting terminal
The number n of packet2。
As optional mode a kind of in the present embodiment, transmitting data packet further includes UDP puppet stem and UDP stem；UDP is first
Portion include: verification and；Control module is also used to that transmission number is calculated according to UDP puppet stem, UDP stem and Q data packet
According to packet Inspection and；It compares the Inspection of transmission data packet and and verifies and if unanimously, verification passes through, execute
The step of storage numbers corresponding data packet with it in the cache unit of no storing data packet.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of column technology or their combination are realized: having a logic gates for realizing logic function to data-signal
Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
It, can also be in addition, each functional unit in each embodiment of the present invention can integrate in a processing module
It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.The scope of the present invention
By appended claims and its equivalent limit.
Claims (6)
1. a kind of method of reseptance of data scrolling transmission characterized by comprising
S cache unit is preset, and to the S cache unit number consecutively, wherein a cache unit is for storing
One data packet；
Transmission data packet is received, the transmission data packet includes the transmission that Q data packet, transmission packet check value and kth time are sent
The number of each data packet of data packet, wherein the packet header of each data packet includes at least the number of data packet, and k, S, Q are positive
Integer, Q≤S, k < S；
The number of each data packet of the transmission data packet sent according to the kth time obtains the transmission number that the kth time is sent
According to each data packet of packet；
The data of each data packet for the transmission data packet that data and the kth time to the Q data packet are sent carry out school
Test the transmission packet verification comparison value that the transmission data packet is calculated；
It compares the transmission packet check value and transmission packet verification comparison value and successively judges institute if unanimously, verification passes through
It states in the corresponding cache unit of number of Q data packet and whether has been stored with data packet, in the caching of no storing data packet
Storage numbers corresponding data packet with it in unit, abandons the corresponding data of number for the cache unit for being stored with data packet
Packet.
2. the method as described in claim 1, it is characterised in that: after receiving transmission data packet, the method also includes:
Judge whether to meet n1=n2+ 1, wherein n1 is the smallest number in the number of the Q data packet, n2Not store
The smallest number in the number of the cache unit of data packet；
It include the number of the data packet of request retransmission in the retransmission request if it is satisfied, then sending retransmission request to transmitting terminal
n2。
3. method according to claim 1 or 2, it is characterised in that:
The transmission data packet further include: UDP puppet stem and UDP stem；The UDP stem include: verification and；
After receiving the transmission data packet, numbered pair in described stored in the cache unit of no storing data packet with it
Before the data packet answered, the method also includes: according to the UDP puppet stem, the UDP stem and the Q data packet
Be calculated it is described transmission data packet Inspection and；
Compare it is described transmission data packet verification and with Inspection and, if unanimously, verification pass through, execute described in do not having
The step of storage numbers corresponding data packet with it in the cache unit of storing data packet.
4. a kind of reception device of data scrolling transmission characterized by comprising S cache unit, receives mould at processing module
Block and control module, in which:
The processing module, for the S cache unit number consecutively a, wherein cache unit is for storing one
Data packet；
The receiving module, for receiving transmission data packet, the transmission data packet includes Q data packet, transmission packet check value
The number of each data packet of the transmission data packet sent with kth time, wherein the packet header of each data packet includes at least data packet
Number, k, S, Q be positive integer, Q≤S, k < S；
The control module, for described in the number acquisition according to each data packet of the transmission data packet of the kth time transmission
The each data packet for the transmission data packet that kth time is sent；The transmission that data and the kth time to the Q data packet are sent
The data of each data packet of data packet carry out the transmission packet verification comparison value that the transmission data packet is calculated in verification；It compares
The transmission packet check value and transmission packet verification comparison value, if unanimously, verifying and passing through, successively judge the Q number
According to whether data packet has been stored in the corresponding cache unit of the number of packet, deposited in the cache unit of no storing data packet
Chu Yuqi numbers corresponding data packet, abandons the corresponding data packet of number for the cache unit for being stored with data packet.
5. device as claimed in claim 4, it is characterised in that: further include: sending module, in which:
The control module is also used to judge whether to meet n1=n2+ 1, wherein n1It is minimum in the number of the Q data packet
Number, n2For the smallest number in the number of the cache unit of no storing data packet；If it is satisfied, then controlling the transmission
Module sends retransmission request to transmitting terminal；
The sending module includes request retransmission in the retransmission request for sending the retransmission request to the transmitting terminal
Data packet number n2。
6. device as described in claim 4 or 5, it is characterised in that:
The transmission data packet further includes UDP puppet stem and UDP stem；The UDP stem include: verification and；
The control module is also used to be calculated according to the UDP puppet stem, the UDP stem and the Q data packet
It is described transmission data packet Inspection and；Compare it is described transmission data packet Inspection and and verification and, if unanimously,
Verification passes through, and executes described the step of storage numbers corresponding data packet with it in the cache unit of no storing data packet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810246777.4A CN110299973B (en) | 2018-03-23 | 2018-03-23 | Receiving method and device for data rolling transmission |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810246777.4A CN110299973B (en) | 2018-03-23 | 2018-03-23 | Receiving method and device for data rolling transmission |
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| Publication Number | Publication Date |
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| CN110299973A true CN110299973A (en) | 2019-10-01 |
| CN110299973B CN110299973B (en) | 2022-04-05 |
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| CN113595685A (en) * | 2021-07-15 | 2021-11-02 | 上海晶赞融宣科技有限公司 | Data transmission method and device, storage medium and terminal |
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