CN108650061A - VPN Proxy Methods, device, storage medium and system based on FEC - Google Patents
VPN Proxy Methods, device, storage medium and system based on FEC Download PDFInfo
- Publication number
- CN108650061A CN108650061A CN201810375027.7A CN201810375027A CN108650061A CN 108650061 A CN108650061 A CN 108650061A CN 201810375027 A CN201810375027 A CN 201810375027A CN 108650061 A CN108650061 A CN 108650061A
- Authority
- CN
- China
- Prior art keywords
- fec
- message
- agent
- agent sides
- sides
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
-
- 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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Quality & Reliability (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
This disclosure relates to a kind of VPN Proxy Methods, device, storage medium and system based on FEC, the data transmission stability to solve the problems, such as VPN agencies in the prior art is poor.This method includes：After first FEC agent sides receive the message that the VPN device acted on behalf of by the first FEC agent sides is sent, the message is cached, and the message is sent to the 2nd FEC agent sides；FEC codings are carried out to the message of caching according to redundancy ratio, obtain redundant message, and the redundant message is sent to the 2nd FEC agent sides.
Description
Technical field
This disclosure relates to the communications field, and in particular, to a kind of VPN Proxy Methods, device, storage medium based on FEC
And system.
Background technology
Currently, building the special of safety using VPN (Virtual Private Network, Virtual Private Network) technology
With in network development process, since mobile network or wifi network have certain packet loss and shake, terminal is caused to access safety net by VPN
When network transmits, usually interim card, existing especially for the terminal with high speed data transfer demand, such as high in the clouds intelligent robot
Some dedicated network experience effects are excessively poor.
FEC (Forward Error Correction, forward error correction) technology is to be transmitted redundancy using data
Method recipient will be allowed to build data again, to increase the confidence level of data communication when occurring mistake in transmission.To understand
Certainly influence of the packet loss to VPN upper-layer services, while ensureing the stability of delay using FEC is one good in VPN agencies
Selection.
But the relevant technologies are very dumb to the use of FEC, can not extend, such as the FEC processing based on streaming media service
It is simply possible to use in the client and server program of media, FEC technologies how to be enable to be common to VPN agencies, art technology
Personnel are not considered.
Invention content
Purpose of this disclosure is to provide a kind of VPN Proxy Methods, device, storage medium and system based on FEC, to solve
The poor problem of the data transmission stability of VPN agencies in the prior art.
To achieve the goals above, disclosure first aspect provides a kind of VPN Proxy Methods based on FEC, the method
Including：
First forward error correction FEC agent sides are received to be set by the Virtual Private Network VPN that the first FEC agent sides are acted on behalf of
After the message that preparation is sent, the message is cached, and the message is sent to the 2nd FEC agent sides；
FEC codings are carried out to the message of caching according to redundancy ratio, obtain redundant message, and the redundant message is sent out
Give the 2nd FEC agent sides.
Optionally, described that FEC codings are carried out to the message of caching according to redundancy ratio, redundant message is obtained, including：
It is received in the first FEC agent sides and belongs to the data packet of same session and reach preset quantity threshold value and/or institute
The duration of the first FEC agent sides caching message is stated when reaching preset duration threshold value, according to redundancy ratio to the message of caching into
Row FEC codings, obtain the redundant message.
Optionally, the method includes：
Receive the packet loss that the 2nd FEC agent sides return；
The redundancy ratio of the first FEC agent sides is adjusted according to the packet loss.
Optionally, the redundancy ratio that the first FEC agent sides are adjusted according to the packet loss, including：
The redundancy ratio O1 of the first FEC agent sides is calculated based on following formula：
O1=M:N；Wherein, M is the same group of data message for belonging to same session that the first FEC agent sides receive
Quantitative value, N be more thanSmallest positive integral value, LossRate is packet loss.
Optionally, the method is applied to the VPN agencies based on User Datagram Protocol udp protocol, then it is described will be described
Message is sent to the 2nd FEC agent sides, including：It replicates the message parallel while caching the message and carries out FEC data
The package of datagram protocol FDP formats, and the message after package is sent to the 2nd FEC agent sides；
It is described that the redundant message is sent to the 2nd FEC agent sides, including：Described in redundant message progress
The package of FDP formats, and the redundant message after package is sent to the 2nd FEC agent sides；
Wherein, header size as defined in the FDP formats is 20 bytes, and the header includes following field：
Sequence of message number, redundant message number, message identification, packet loss, session identification, data message length, is filled out at data message number
Fill position.
Disclosure second aspect provides a kind of VPN Proxy Methods based on FEC, the method includes：
After 2nd FEC agent sides receive the message of the first FEC agent sides transmission, the message is cached；
The message is sent to the VPN device acted on behalf of by the 2nd FEC agent sides；And
Judge whether the message is lost, if the message is lost, the message based on caching passes through
FEC restores the message of loss, and the message after recovery is sent to and is set by the VPN that the 2nd FEC agent sides are acted on behalf of
It is standby.
Optionally, the method further includes：
The 2nd FEC agent sides calculate the packet loss of the message, and the packet loss is sent to the first FEC
Agent side.
Optionally, the packet loss that the 2nd FEC agent sides calculate the message includes：
It is to calculate basis with same group of message of same session, the packet loss LossRate is calculated by following formula：
Wherein, DataNum represents the data volume of data message, and ReduNum represents the data volume of redundant message, RecvNum
The sum of the data volume of the data message and redundant message that receive is represented, LossRate ' is upper one group of message of this group of message
Packet loss, ratio are the occupation proportion coefficient of front and back packet loss twice.
The disclosure third aspect provides a kind of FEC agent sides, including：
Cache module, for receiving the Virtual Private Network acted on behalf of by the FEC agent sides in the FEC agent sides
After the message that VPN device is sent, the message is cached；
Sending module, for the message to be sent to the 2nd FEC agent sides；
FEC coding modules obtain redundant message for carrying out FEC codings to the message of caching according to redundancy ratio；
The sending module is additionally operable to, and the redundant message is sent to the 2nd FEC agent sides.
Optionally, the FEC coding modules are used for：
It is received in the first FEC agent sides and belongs to the data packet of same session and reach preset quantity threshold value and/or institute
The duration of the first FEC agent sides caching message is stated when reaching preset duration threshold value, according to redundancy ratio to the message of caching into
Row FEC codings, obtain the redundant message.
Optionally, further include：
Receiving module, the packet loss returned for receiving the 2nd FEC agent sides；
Redundancy ratio adjusts module, the redundancy ratio for adjusting the first FEC agent sides according to the packet loss.
Optionally, the redundancy ratio adjustment module is used for：
The redundancy ratio O1 of the first FEC agent sides is calculated based on following formula：
O1=M:N；Wherein, M is the same group of data message for belonging to same session that the first FEC agent sides receive
Quantitative value, N be more thanSmallest positive integral value, LossRate is packet loss.
Optionally, the FEC agent sides are applied to the VPN agencies based on User Datagram Protocol udp protocol, the transmission
Module is used for：It replicates the message parallel while the cache module caches the message and carries out FEC datagram protocols FDP
The package of format, and the message after package is sent to the 2nd FEC agent sides；The FDP is carried out to the redundant message
The package of format, and the redundant message after package is sent to the 2nd FEC agent sides；
Wherein, header size as defined in the FDP formats is 20 bytes, and the header includes following field：
Sequence of message number, redundant message number, message identification, packet loss, session identification, data message length, is filled out at data message number
Fill position.
Disclosure fourth aspect provides a kind of FEC agent sides, including：
Cache module, for the FEC agent sides receive the first FEC agent sides transmission message after, described in caching
Message；
First sending module, for the message to be sent to the VPN device acted on behalf of by the FEC agent sides；
Judgment module, for judging whether the message is lost；
Message recovery module, for when the message is lost, the message based on caching to be by FEC to losing
Message restored；
First sending module is additionally operable to, and the message after recovery is sent to and is set by the VPN that the FEC agent sides are acted on behalf of
It is standby.
Optionally, further include：
Packet loss computing module, the packet loss for calculating the message；
Second sending module, for the packet loss to be sent to the first FEC agent sides.
Optionally, the packet loss computing module is used for：
It is to calculate basis with same group of message of same session, the packet loss LossRate is calculated by following formula：
Wherein, DataNum represents the data volume of data message, and ReduNum represents the data volume of redundant message, RecvNum
The sum of the data volume of the data message and redundant message that receive is represented, LossRate ' is upper one group of message of this group of message
Packet loss, ratio are the occupation proportion coefficient of front and back packet loss twice.
The 5th aspect of the disclosure provides a kind of computer readable storage medium, is stored thereon with computer program, the program
The step of the first FEC agent sides described in first aspect execute method is realized when being executed by processor, or realizes second aspect institute
State the step of the 2nd FEC agent sides execute method.
The 6th aspect of the disclosure provides a kind of VPN agency plants based on FEC, including VPN client, with VPN visitors
The connected FEC agent clients in family end, vpn server, and the FEC proxy servers that are connected with the vpn server；
The FEC agent clients are used for, after receiving the message that the VPN client is sent, as the first FEC generations
The method described in end execution first aspect is managed, and the FEC proxy servers are used for, and are receiving the FEC agent clients
After the message of transmission, the method described in second aspect is executed as the 2nd FEC agent sides；Alternatively,
The FEC proxy servers are used for, after receiving the message that the vpn server is sent, as the first FEC generations
The method described in end execution first aspect is managed, and the FEC agent clients are used for, and are receiving the FEC proxy servers
After the message of transmission, the method described in second aspect is executed as the 2nd FEC agent sides.
Through the above technical solutions, the first FEC agent sides receive the virtual private acted on behalf of by the first FEC agent sides
After the message that network VPN device is sent, caches the message and the message is transmitted directly to the 2nd FEC agent sides, and
FEC can also be carried out to the message of caching to encode to obtain redundant message, and the redundant message is sent according to redundancy ratio
To the 2nd FEC agent sides, so that the message received and redundant message are sent to by institute by the 2nd FEC agent sides
State the VPN device of the 2nd FEC agent sides agency.For example, the VPN device acted on behalf of by the first FEC agent sides can be VPN client
End, the VPN device acted on behalf of by the 2nd FEC agent sides can be vpn server, in this way, by VPN client and VPN services
Increasing FEC agencies between device so that forward error correction technique can be applied in VPN data transmission, reduce data packetloss, also,
FEC acts on behalf of the real-time forwarding mechanism of end edge caching side forwarding, decreases time delay.
Other feature and advantage of the disclosure will be described in detail in subsequent specific embodiment part.
Description of the drawings
Attached drawing is for providing further understanding of the disclosure, and a part for constitution instruction, with following tool
Body embodiment is used to explain the disclosure together, but does not constitute the limitation to the disclosure.In the accompanying drawings：
Fig. 1 is a kind of structural schematic diagram for VPN agency plants based on FEC that the embodiment of the present disclosure provides；
Fig. 2 is a kind of flow diagram for VPN Proxy Methods based on FEC that the embodiment of the present disclosure provides；
Fig. 3 is a kind of schematic diagram for FDP protocol formats that the embodiment of the present disclosure provides；
Fig. 4 is the flow diagram for another VPN Proxy Methods based on FEC that the embodiment of the present disclosure provides；
Fig. 5 is a kind of structural schematic diagram for FEC agent sides that the embodiment of the present disclosure provides；
Fig. 6 is the structural schematic diagram for another FEC agent sides that the embodiment of the present disclosure provides；
Fig. 7 is the structural schematic diagram for another FEC agent side that the embodiment of the present disclosure provides.
Specific implementation mode
The specific implementation mode of the disclosure is described in detail below in conjunction with attached drawing.It should be understood that this place is retouched
The specific implementation mode stated is only used for describing and explaining the disclosure, is not limited to the disclosure.
It should be noted that the term " first " in the embodiment of the present disclosure and attached drawing, " second " are similar for distinguishing
Object, and should not be construed as describing specific sequence or precedence.
The embodiment of the present disclosure provides a kind of VPN agency plants based on FEC, the VPN agencies based on FEC as shown in Figure 1
System 100, including VPN client 101, the FEC agent clients 102 being connected with the VPN client 101, vpn server
103, and the FEC proxy servers 104 that are connected with the vpn server 103.
Wherein, VPN client 101 and vpn server 103 can be based on UDP (User Datagram Protocol,
User Datagram Protocol) client and service terminal software.In this way, between VPN client 101 and FEC agent clients 102,
And UDP transmitting messages can be based between vpn server 103 and FEC proxy servers 104, and FEC agent clients 102
FEC mechanism transmitting messages are used between FEC proxy servers 104.
Specifically, agency of the FEC agent clients 102 as VPN client 101 is receiving VPN client 101
After the message of transmission, FEC proxy servers 104 need to be forwarded the packet to, so that FEC proxy servers 104 send out the message
Vpn server 103 is given, realizes VPN client 101 to 103 transmitting message of vpn server.Meanwhile FEC proxy servers 104
As the agency of vpn server 103 FEC need to be forwarded the packet to after the message for receiving the transmission of vpn server 103
Agent client 102 realizes vpn server 103 so that the message is sent to VPN client 101 by FEC agent clients 102
To 101 transmitting message of VPN client.
Illustratively, as shown in Figure 1, in the case where the VPN based on udp protocol acts on behalf of scene, VPN client 101 and FEC agency visitors
Udp protocol transmitting message can be based between family end 102 and between vpn server 103 and FEC proxy servers 104, and
The customized FDP agreements of the embodiment of the present disclosure can be based between FEC agent clients 102 and FEC proxy servers 104 to carry out
Message transmissions (the FDP agreements will be described in detail in embodiment of the method).In this way, using above system, by VPN client
Increase FEC agencies between vpn server so that forward error correction technique can be applied in VPN data transmission, reduces data and loses
Packet stablizes packet loss, and can be adapted for the client based on udp protocol and service terminal software, and autgmentability is strong.
The embodiment of the present disclosure provides a kind of VPN Proxy Methods based on FEC, such as applied to shown in FIG. 1 based on FEC's
VPN agency plants 100, as shown in Fig. 2, this method includes：
After S201, the first FEC agent sides receive the message that the VPN device acted on behalf of by the first FEC agent sides is sent,
The message is cached, and the message is sent to the 2nd FEC agent sides.
In the specific implementation, the first FEC agent sides can execute caching message and replicate the message and be sent parallel,
It avoids message from sending to wait for, reduces time delay.In addition, the first FEC agent sides can reasonably encapsulate the message received
After be sent to the 2nd FEC agent sides.
S202, the first FEC agent sides carry out FEC codings according to redundancy ratio to the message of caching, obtain redundant message,
And the redundant message is sent to the 2nd FEC agent sides.
It is worth noting that the first FEC agent sides described in the embodiment of the present disclosure refer to receiving proxied VPN device
The message of transmission, the FEC agent sides that need to be E-Packeted to opposite end (i.e. the 2nd FEC agent sides).With shown in FIG. 1 based on FEC's
Illustrated for VPN agency plants 100, FEC agent clients 102 receive VPN client 101 transmission message when,
FEC agent clients 102 are used as above-mentioned first FEC agent sides, and the VPN device by the first FEC agent sides agency refers to VPN
Client 101, and the 2nd FEC agent sides are FEC proxy servers 104.Similarly, FEC proxy servers 104 are receiving
When the message that vpn server 103 is sent, FEC proxy servers 104 are used as above-mentioned first FEC agent sides, by the first FEC generations
The VPN device for managing end agency refers to vpn server 103, and the 2nd FEC agent sides are FEC agent clients 102.In order to
Description is easy, is described below with the first FEC agent sides and the 2nd FEC agent sides.
By taking FEC agent clients are the first FEC agent sides as an example, in the application scenarios of the VPN agencies based on udp protocol
Under, FEC agent clients specifically can be by monitoring a UDP socket a, to receive the message of proxied client, simultaneously
The FEC agent clients create a UDP socket b and are used to communicate with FEC proxy servers.Also, FEC agent clients
After socket a receives message, caching message is encoded for FEC, while FEC agency's clothes are sent to after copy packet progress package
Business device.
Further, in above-mentioned steps S202, the first FEC agent sides can meet certain article in the determining message cached
When part, triggering FEC codings, for example, in one possible implementation, the first FEC agent sides can be belonged to receiving
When the data packet of same session (such as same UDP connections) reaches preset quantity threshold value, according to redundancy ratio to the message of caching into
Row FEC codings are to obtain redundant message.In alternatively possible realization method, the first FEC agent sides can be in caching message
Duration when reaching preset duration threshold value, FEC is carried out to the message of caching according to redundancy ratio and is encoded to obtain redundant message.
Wherein, the redundancy ratio of the first FEC agent sides can be preset, can also be according to the 2nd FEC agent sides
What the packet loss of return was calculated.That is, the first FEC agent sides can also receive losing for the 2nd FEC agent sides return
Packet rate, and adjust according to the packet loss redundancy ratio of the first FEC agent sides.Illustratively, the first FEC agent sides can be with base
In following formula computing redundancy ratio O1：
O1=M:N；Wherein, M be the first FEC agent sides receive belong to same session (such as same UDP connect
Connect) same group of data message quantitative value, N be more thanSmallest positive integral value, LossRate be the 2nd FEC
Agent side is calculated based on the message received and returns to the packet loss of the first FEC agent sides.
The embodiment of the present disclosure uses the method for adjusting redundancy ratio according to packet loss dynamic, can reach stable packet loss, carry
The effect of high bandwidth utilization improves the data transmission stability of VPN agencies.
Below by taking the VPN agencies based on udp protocol as an example, illustrate the first FEC agent sides and the 2nd FEC agent sides it
Between message transmissions.It illustratively, can be according to FDP (FEC Datagram between the first FEC agent sides and the 2nd FEC agent sides
Protocol) format transmission message, that is to say, that the first FEC agent sides arrived involved in above-mentioned steps are to the 2nd FEC agent sides
The message and redundant message and the 2nd FEC agent sides of transmission are to the first FEC agent sides return packet loss will be with FDP lattice
What formula was sent.Specifically, header size as defined in FDP formats is 20 bytes, and the header includes following field：Report
Literary sequence number, data message number, redundant message number, message identification, packet loss, session identification, data message length, filling
Position.Fig. 3 shows FDP message formats, as illustrated in the drawing header, 4 byte-sized of each behavior, and header includes five
Row, i.e. 20 byte-sizeds.Specifically, header includes following field：Sequence of message Sequence Number, datagram
Literary number DataNum, redundant message number ReduNum, message identification PacketID, packet loss LossRate, session identification
SessionID, data message length DataLength, filler Padding.User Data after header are message
User data behind head.
Using customized FDP formats so that the method that the embodiment of the present disclosure provides can be not only common to is assisted based on UDP
The client and server software of view.
The embodiment of the present disclosure also provides another VPN Proxy Methods based on FEC, and this method is applied to described in Fig. 2
The corresponding 2nd FEC agent sides of first FEC agent sides, as shown in figure 4, the method includes：
After S401, the 2nd FEC agent sides receive the message of the first FEC agent sides transmission, the message is cached.
S402, the message is sent to the VPN device acted on behalf of by the 2nd FEC agent sides.
S403, judge whether the message is lost, if the message is lost, the message based on caching
The message of loss is restored by FEC, and the message after recovery is sent to and is acted on behalf of by the 2nd FEC agent sides
VPN device.
It is worth noting that the first FEC agent sides described in the embodiment of the present disclosure refer to receiving proxied VPN device
The message of transmission, the FEC agent sides that need to be E-Packeted to opposite end (i.e. the 2nd FEC agent sides).Implement with reference to the corresponding methods of Fig. 2
To the explanation of the first FEC agent sides and the 2nd FEC agent sides by taking the VPN agency plants 100 based on FEC as an example in example, herein not
It repeats again.
By taking FEC proxy servers are the 2nd FEC agent sides as an example, in the application scenarios of the VPN agencies based on udp protocol
Under, the 2nd FEC agent sides monitor a UDP socket aa, for receiving FEC agent client messages, while can receive one
When a new UDP connections, a UDP socket bb is created, is used for and proxied server (vpn server as shown in Figure 1
103) it communicates.Also, when FEC agency services end UDP socket aa receives the message of a FEC agent client, parsing is simultaneously
The message is cached, and message is sent to proxied server.
At FEC agency services end, UDP socket aa receives M report of the same UDP connections for carrying out FEC agent clients
Wen Shi loses if any data message and then restores to lose message by FEC and be forwarded to proxied server, ensure that data just
Really transmission.Wherein, M values are variable, in the Message Protocol between the first FEC agent sides and the 2nd FEC agent sides
Defined value, for example, the agreement can be FDP agreements as shown in Figure 3, referring in particular to the above-mentioned explanation for Fig. 3, herein not
It repeats again.
Optionally, the 2nd FEC agent sides can also calculate the packet loss of message, and the packet loss is sent to institute
The first FEC agent sides are stated, so that the first FEC agent sides are according to the redundancy ratio of packet loss dynamic adjustment FEC.
Illustratively, the 2nd FEC agent sides are to calculate basis with same group of message of same session (such as same UDP connections),
The packet loss LossRate is calculated by following formula：
Wherein, DataNum represents the data volume of data message, and ReduNum represents the data volume of redundant message, RecvNum
The sum of the data volume of the data message and redundant message that receive is represented, LossRate ' is upper one group of message of this group of message
Packet loss, ratio are the occupation proportion coefficient of front and back packet loss twice.In the specific implementation, which can be with default setting
0.8, with smooth packet loss, reduce shake.
The embodiment of the present disclosure also provides a kind of FEC agent sides 500, shown in FIG. 1 for implementing as the first FEC agent sides
Method and step, as shown in figure 5, including：
Cache module 501, for receiving the Virtual Private Network acted on behalf of by the FEC agent sides in the FEC agent sides
After the message that network VPN device is sent, the message is cached；
Sending module 502, for the message to be sent to the 2nd FEC agent sides；
FEC coding modules 503 obtain redundancy report for carrying out FEC codings to the message of caching according to redundancy ratio
Text；
The sending module 502 is additionally operable to, and the redundant message is sent to the 2nd FEC agent sides.
Optionally, the FEC coding modules 503 are used for：It is received in the first FEC agent sides and belongs to same session
Data packet reaches the duration of preset quantity threshold value and/or the first FEC agent sides caching message when reaching preset duration threshold value,
FEC codings are carried out to the message of caching according to redundancy ratio, obtain the redundant message.
Optionally, as illustrated in the drawing shown in dotted line frame, which further includes：
Receiving module 504, the packet loss returned for receiving the 2nd FEC agent sides；
Redundancy ratio adjusts module 505, the redundancy for adjusting the first FEC agent sides according to the packet loss
Than.
Optionally, the redundancy ratio adjustment module 505 is used for：
The redundancy ratio O1 of the first FEC agent sides is calculated based on following formula：
O1=M:N；Wherein, M is the same group of data message for belonging to same session that the first FEC agent sides receive
Quantitative value, N be more thanSmallest positive integral value, LossRate is packet loss.
Optionally, the FEC agent sides are applied to the VPN agencies based on User Datagram Protocol udp protocol, the transmission
Module 502 is used for：The package of FEC datagram protocol FDP formats is carried out to the message, and the message after package is sent to institute
State the 2nd FEC agent sides；The package of the FDP formats is carried out to the redundant message, and the redundant message after package is sent
To the 2nd FEC agent sides；Wherein, header size as defined in the FDP formats is 20 bytes, the header packet
Include following field：Sequence of message number, data message number, redundant message number, message identification, packet loss, session identification, data
Message length, filler.
About the device in above-described embodiment, it is shown in Fig. 2 to execute the concrete mode operated for wherein modules
It is described in detail in the embodiment of method, explanation will be not set forth in detail herein.
The embodiment of the present disclosure also provides another kind FEC agent sides 600, for being used as the 2nd FEC agent sides to implement shown in Fig. 4
Method the step of, as shown in fig. 6, including：
Cache module 601, for after the message that the FEC agent sides receive the transmission of the first FEC agent sides, caching institute
State message；
First sending module 602, for the message to be sent to the VPN device acted on behalf of by the FEC agent sides；
Judgment module 603, for judging whether the message is lost；
Message recovery module 604, for when the message is lost, the message based on caching to pass through FEC pairs
The message of loss is restored；
First sending module 602 is additionally operable to, and the message after recovery is sent to and is acted on behalf of by the FEC agent sides
VPN device.
Optionally, shown in dotted line frame as shown in FIG. 6, FEC agent sides 600 further include：
Packet loss computing module 605, the packet loss for calculating the message；
Second sending module 606, for the packet loss to be sent to the first FEC agent sides.
Optionally, the packet loss computing module 605 is used for：
It is to calculate basis with same group of message of same session, the packet loss LossRate is calculated by following formula：
Wherein, DataNum represents the data volume of data message, and ReduNum represents the data volume of redundant message, RecvNum
The sum of the data volume of the data message and redundant message that receive is represented, LossRate ' is upper one group of message of this group of message
Packet loss, ratio are the occupation proportion coefficient of front and back packet loss twice.
About the device in above-described embodiment, it is shown in Fig. 4 to execute the concrete mode operated for wherein modules
It is described in detail in the embodiment of method, explanation will be not set forth in detail herein.
It is worth noting that in system 100 shown in FIG. 1, it is two-way between VPN client 101 and vpn server 103
In the case of communication, due to FEC agent clients 102 and FEC proxy servers 104 may be used as the first FEC agent sides with
And the 2nd FEC agent side, therefore, FEC agent clients 102 include FEC agent sides 500 simultaneously with FEC proxy servers 104
With FEC agent sides 600.
The embodiment of the present disclosure also provides a kind of computer readable storage medium, is stored thereon with computer program, the program
The step of the first FEC agent sides described in Fig. 1 execute method is realized when being executed by processor, or realizes the 2nd FEC generations described in Fig. 3
Manage the step of end executes method.
Fig. 7 is a kind of block diagram for FEC agent sides 700 that the embodiment of the present disclosure provides, for example, the FEC agent sides 700 can be with
It is provided as a proxy server or an agent client.As shown in fig. 7, the FEC agent sides 700 may include processor
701, quantity can be one or more and memory 702, for storing the computer journey that can be executed by processor 701
Sequence.The computer program stored in memory 702 may include it is one or more each correspond to one group of instruction
Module.In addition, processor 701, which can be configured as, executes the computer program, acted on behalf of with executing the above-mentioned VPN based on FEC
Method.
In addition, FEC agent sides 700 can also include power supply module 703 and communication component 704, which can be with
It is configured as executing the power management of FEC agent sides 700, which, which can be configured as, realizes FEC agent sides 700
Communication, for example, wired or wireless communication.In addition, the FEC agent sides 700 can also include input/output (I/O) interface
705.FEC agent sides 700 can be operated based on the operating system for being stored in memory 705, such as Windows ServerTM,
Mac OS XTM, UnixTM, LinuxTM etc..
The computer readable storage medium of the above-mentioned offer of the embodiment of the present disclosure can be with for above-mentioned depositing including program instruction
Reservoir 705, above procedure instruction can be executed by the processor 701 of FEC agent sides 700 to complete the above-mentioned VPN generations based on FEC
Reason method.
The preferred embodiment of the disclosure is described in detail above in association with attached drawing, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure
Monotropic type, these simple variants belong to the protection domain of the disclosure.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the disclosure to it is various can
The combination of energy no longer separately illustrates.
In addition, arbitrary combination can also be carried out between a variety of different embodiments of the disclosure, as long as it is without prejudice to originally
Disclosed thought equally should be considered as disclosure disclosure of that.
Claims (18)
1. a kind of VPN Proxy Methods based on FEC, which is characterized in that the method includes：
First forward error correction FEC agent sides receive the Virtual Private Network VPN device hair acted on behalf of by the first FEC agent sides
After the message sent, the message is cached, and the message is sent to the 2nd FEC agent sides；
FEC codings are carried out to the message of caching according to redundancy ratio, obtain redundant message, and the redundant message is sent to
The 2nd FEC agent sides.
2. according to the method described in claim 1, it is characterized in that, described carry out the message of caching according to redundancy ratio
FEC is encoded, and obtains redundant message, including：
It is received in the first FEC agent sides and belongs to the data packet of same session and reach preset quantity threshold value and/or described
When the duration of one FEC agent sides caching message reaches preset duration threshold value, FEC is carried out to the message of caching according to redundancy ratio
Coding, obtains the redundant message.
3. according to the method described in claim 1, it is characterized in that, the method includes：
Receive the packet loss that the 2nd FEC agent sides return；
The redundancy ratio of the first FEC agent sides is adjusted according to the packet loss.
4. according to the method described in claim 3, it is characterized in that, described adjust the first FEC generations according to the packet loss
The redundancy ratio at end is managed, including：
The redundancy ratio O1 of the first FEC agent sides is calculated based on following formula：
O1=M:N；Wherein, M is the number for the same group of data message for belonging to same session that the first FEC agent sides receive
Magnitude, N be more thanSmallest positive integral value, LossRate is packet loss.
5. method according to claim 1 to 4, which is characterized in that the method is applied to be based on number of users
It is acted on behalf of according to the VPN of datagram protocol udp protocol, then it is described that the message is sent to the 2nd FEC agent sides, including：Described in caching
The package that the message carries out FEC datagram protocol FDP formats is replicated while message parallel, and the message after package is sent
To the 2nd FEC agent sides；
It is described that the redundant message is sent to the 2nd FEC agent sides, including：The FDP is carried out to the redundant message
The package of format, and the redundant message after package is sent to the 2nd FEC agent sides；
Wherein, header size as defined in the FDP formats is 20 bytes, and the header includes following field：Message
Sequence number, data message number, redundant message number, message identification, packet loss, session identification, data message length, filling
Position.
6. a kind of VPN Proxy Methods based on FEC, which is characterized in that the method includes：
After 2nd FEC agent sides receive the message of the first FEC agent sides transmission, the message is cached；
The message is sent to the VPN device acted on behalf of by the 2nd FEC agent sides；And
Judge whether the message is lost, if the message is lost, the message based on caching passes through FEC pairs
The message of loss is restored, and the message after recovery is sent to the VPN device acted on behalf of by the 2nd FEC agent sides.
7. according to the method described in claim 6, it is characterized in that, the method further includes：
The 2nd FEC agent sides calculate the packet loss of the message, and the packet loss is sent to the first FEC and is acted on behalf of
End.
8. the method according to the description of claim 7 is characterized in that the 2nd FEC agent sides calculate the packet loss of the message
Rate includes：
It is to calculate basis with same group of message of same session, the packet loss LossRate is calculated by following formula：
Wherein, DataNum represents the data volume of data message, and ReduNum represents the data volume of redundant message, and RecvNum is represented
The sum of the data volume of the data message and redundant message that receive, LossRate ' are the packet loss of upper one group of message of this group of message
Rate, ratio are the occupation proportion coefficient of front and back packet loss twice.
9. a kind of FEC agent sides, which is characterized in that including：
Cache module is set for being received in the FEC agent sides by the Virtual Private Network VPN that the FEC agent sides are acted on behalf of
After the message that preparation is sent, the message is cached；
Sending module, for the message to be sent to the 2nd FEC agent sides；
FEC coding modules obtain redundant message for carrying out FEC codings to the message of caching according to redundancy ratio；
The sending module is additionally operable to, and the redundant message is sent to the 2nd FEC agent sides.
10. FEC agent sides according to claim 9, which is characterized in that the FEC coding modules are used for：
It is received in the first FEC agent sides and belongs to the data packet of same session and reach preset quantity threshold value and/or described
When the duration of one FEC agent sides caching message reaches preset duration threshold value, FEC is carried out to the message of caching according to redundancy ratio
Coding, obtains the redundant message.
11. FEC agent sides according to claim 9, which is characterized in that further include：
Receiving module, the packet loss returned for receiving the 2nd FEC agent sides；
Redundancy ratio adjusts module, the redundancy ratio for adjusting the first FEC agent sides according to the packet loss.
12. FEC agent sides according to claim 11, which is characterized in that the redundancy ratio adjustment module is used for：
The redundancy ratio O1 of the first FEC agent sides is calculated based on following formula：
O1=M:N；Wherein, M is the number for the same group of data message for belonging to same session that the first FEC agent sides receive
Magnitude, N be more thanSmallest positive integral value, LossRate is packet loss.
13. the FEC agent sides according to any one of claim 9 to 12, which is characterized in that the FEC agent sides application
In the VPN agencies based on User Datagram Protocol udp protocol, the sending module is used for：Described in cache module caching
The package that the message carries out FEC datagram protocol FDP formats is replicated while message parallel, and the message after package is sent
To the 2nd FEC agent sides；Carry out the package of the FDP formats to the redundant message, and by the redundant message after package
It is sent to the 2nd FEC agent sides；
Wherein, header size as defined in the FDP formats is 20 bytes, and the header includes following field：Message
Sequence number, data message number, redundant message number, message identification, packet loss, session identification, data message length, filling
Position.
14. a kind of FEC agent sides, which is characterized in that including：
Cache module, for after the message that the FEC agent sides receive the transmission of the first FEC agent sides, caching the message；
First sending module, for the message to be sent to the VPN device acted on behalf of by the FEC agent sides；
Judgment module, for judging whether the message is lost；
Message recovery module, for when the message is lost, the message based on caching to be by FEC to the report of loss
Text is restored；
First sending module is additionally operable to, and the message after recovery is sent to the VPN device acted on behalf of by the FEC agent sides.
15. FEC agent sides according to claim 14, which is characterized in that further include：
Packet loss computing module, the packet loss for calculating the message；
Second sending module, for the packet loss to be sent to the first FEC agent sides.
16. FEC agent sides according to claim 15, which is characterized in that the packet loss computing module is used for：
It is to calculate basis with same group of message of same session, the packet loss LossRate is calculated by following formula：
Wherein, DataNum represents the data volume of data message, and ReduNum represents the data volume of redundant message, and RecvNum is represented
The sum of the data volume of the data message and redundant message that receive, LossRate ' are the packet loss of upper one group of message of this group of message
Rate, ratio are the occupation proportion coefficient of front and back packet loss twice.
17. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is by processor
The step of any one of claim 1 to 5 the first FEC agent sides execute method is realized when execution, or realizes that right is wanted
The step of asking any one of 6 to 8 the 2nd FEC agent sides to execute method.
18. a kind of VPN agency plants based on FEC, which is characterized in that including VPN client, be connected with the VPN client
FEC agent clients, vpn server, and the FEC proxy servers that are connected with the vpn server；
The FEC agent clients are used for, after receiving the message that the VPN client is sent, as the first FEC agent sides
Perform claim requires the method described in any one of 1 to 5, and the FEC proxy servers are used for, and are receiving the FEC generations
After managing the message that client is sent, the method described in any one of 6 to 8 is required as the 2nd FEC agent side perform claims；Or
Person,
The FEC proxy servers are used for, after receiving the message that the vpn server is sent, as the first FEC agent sides
Perform claim requires the method described in any one of 1 to 5, and the FEC agent clients are used for, and are receiving the FEC generations
After managing the message that server is sent, the method described in any one of 6 to 8 is required as the 2nd FEC agent side perform claims.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810375027.7A CN108650061A (en) | 2018-04-24 | 2018-04-24 | VPN Proxy Methods, device, storage medium and system based on FEC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810375027.7A CN108650061A (en) | 2018-04-24 | 2018-04-24 | VPN Proxy Methods, device, storage medium and system based on FEC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108650061A true CN108650061A (en) | 2018-10-12 |
Family
ID=63747312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810375027.7A Pending CN108650061A (en) | 2018-04-24 | 2018-04-24 | VPN Proxy Methods, device, storage medium and system based on FEC |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108650061A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109660319A (en) * | 2018-12-29 | 2019-04-19 | 北京金山安全软件有限公司 | Network data transmission method and device and electronic equipment |
| CN110177128A (en) * | 2019-04-15 | 2019-08-27 | 深圳前海达闼云端智能科技有限公司 | Data transmission system and method for establishing VPN connection, terminal and VPN proxy thereof |
| CN110505123A (en) * | 2019-09-04 | 2019-11-26 | 深圳前海达闼云端智能科技有限公司 | Packet loss rate calculation method, server and computer-readable storage medium |
| WO2021047612A1 (en) * | 2019-09-10 | 2021-03-18 | 华为技术有限公司 | Packet processing method, device, and computer storage medium |
| CN112564856A (en) * | 2019-09-10 | 2021-03-26 | 华为技术有限公司 | Message processing method and device and computer readable storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070233891A1 (en) * | 2001-03-09 | 2007-10-04 | Digital Fountain, Inc. | Multi-output packet server with independent streams |
| CN101834700A (en) * | 2010-05-12 | 2010-09-15 | 北京邮电大学 | Unidirectional reliable transmission method and transceiving device based on data packets |
| CN103618678A (en) * | 2013-11-18 | 2014-03-05 | 北京星网锐捷网络技术有限公司 | Method, device and system for self-adaptation multiple-link aggregation |
| CN106656422A (en) * | 2017-01-03 | 2017-05-10 | 珠海全志科技股份有限公司 | Streaming media transmission method capable of dynamically regulating redundancy of FEC (Forward Error Correction) |
| CN107483144A (en) * | 2016-06-07 | 2017-12-15 | 中兴通讯股份有限公司 | Forward error correction feedback information transmission method, device |
-
2018
- 2018-04-24 CN CN201810375027.7A patent/CN108650061A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070233891A1 (en) * | 2001-03-09 | 2007-10-04 | Digital Fountain, Inc. | Multi-output packet server with independent streams |
| CN101834700A (en) * | 2010-05-12 | 2010-09-15 | 北京邮电大学 | Unidirectional reliable transmission method and transceiving device based on data packets |
| CN103618678A (en) * | 2013-11-18 | 2014-03-05 | 北京星网锐捷网络技术有限公司 | Method, device and system for self-adaptation multiple-link aggregation |
| CN107483144A (en) * | 2016-06-07 | 2017-12-15 | 中兴通讯股份有限公司 | Forward error correction feedback information transmission method, device |
| CN106656422A (en) * | 2017-01-03 | 2017-05-10 | 珠海全志科技股份有限公司 | Streaming media transmission method capable of dynamically regulating redundancy of FEC (Forward Error Correction) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109660319A (en) * | 2018-12-29 | 2019-04-19 | 北京金山安全软件有限公司 | Network data transmission method and device and electronic equipment |
| CN109660319B (en) * | 2018-12-29 | 2021-07-23 | 北京金山安全软件有限公司 | Network data transmission method and device and electronic equipment |
| CN110177128A (en) * | 2019-04-15 | 2019-08-27 | 深圳前海达闼云端智能科技有限公司 | Data transmission system and method for establishing VPN connection, terminal and VPN proxy thereof |
| CN110177128B (en) * | 2019-04-15 | 2022-02-01 | 达闼机器人有限公司 | Data transmission system and method for establishing VPN connection, terminal and VPN proxy thereof |
| CN110505123A (en) * | 2019-09-04 | 2019-11-26 | 深圳前海达闼云端智能科技有限公司 | Packet loss rate calculation method, server and computer-readable storage medium |
| CN110505123B (en) * | 2019-09-04 | 2021-07-30 | 达闼机器人有限公司 | Packet loss rate calculation method, server and computer-readable storage medium |
| WO2021047612A1 (en) * | 2019-09-10 | 2021-03-18 | 华为技术有限公司 | Packet processing method, device, and computer storage medium |
| CN112564856A (en) * | 2019-09-10 | 2021-03-26 | 华为技术有限公司 | Message processing method and device and computer readable storage medium |
| US11683123B2 (en) | 2019-09-10 | 2023-06-20 | Huawei Technologies Co., Ltd. | Packet processing method and apparatus, and computer storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108650061A (en) | VPN Proxy Methods, device, storage medium and system based on FEC | |
| Mijovic et al. | Comparing application layer protocols for the Internet of Things via experimentation | |
| US20200358886A1 (en) | Data Transmission Method, Apparatus, And System | |
| CN105991462B (en) | Sending method, sending device and the system of transmission control protocol TCP data packet | |
| CN104836748B (en) | congestion control bit rate algorithm | |
| Xu et al. | CMT-NC: improving the concurrent multipath transfer performance using network coding in wireless networks | |
| TWI531275B (en) | Method of data transmission between a user equipment and a base station in a wireless network system | |
| WO2016100631A1 (en) | Methods for enabling delay-awareness in the constrained application protocol (coap) | |
| US8984158B2 (en) | Data communication system and method | |
| CN109906631B (en) | Adaptive transmission method and device | |
| WO2012129922A1 (en) | Packet handling method, forwarding device and system | |
| WO2014205377A1 (en) | Cross-layer and cross-application acknowledgment for data transmission | |
| CN108965775A (en) | Method of adjustment, device and the storage medium of data packetloss processing strategie | |
| CN108809859A (en) | A kind of transmission coating control method of packet-oriented deadline | |
| CN107027151B (en) | Method and device for ensuring service quality | |
| WO2019144802A1 (en) | Data transmission method and related device | |
| Herrero | Analysis of the constrained application protocol over quick UDP internet connection transport | |
| Wang et al. | Aggressive congestion control mechanism for space systems | |
| CN106936730A (en) | A kind of file transmitting method, TCP agent and TCP Client | |
| CN103379182A (en) | Data transmission method and client sides | |
| CN107634817B (en) | Method and device for data transmission | |
| WO2013152614A1 (en) | System and method for network access based on application layer data | |
| EP3297210A1 (en) | Method for setting packet transmission mode and device | |
| CN113424578B (en) | Acceleration method and device for transmission control protocol | |
| Zong et al. | On Enhancing TCP to Deal with High Latency and Transmission Errors in Geostationary Satellite Network for 5G‐IoT |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181012 |
|
| RJ01 | Rejection of invention patent application after publication |