CN114513335B - Data flow fusion efficient transmission method based on one-way optical gate - Google Patents
Data flow fusion efficient transmission method based on one-way optical gate Download PDFInfo
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- CN114513335B CN114513335B CN202210051991.0A CN202210051991A CN114513335B CN 114513335 B CN114513335 B CN 114513335B CN 202210051991 A CN202210051991 A CN 202210051991A CN 114513335 B CN114513335 B CN 114513335B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
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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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
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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
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- 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
- H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
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- 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
- H04L69/06—Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]
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- 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
- H04L69/22—Parsing or analysis of headers
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- 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
- H04L69/26—Special purpose or proprietary protocols or architectures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2212/00—Encapsulation of packets
Abstract
The invention discloses a data flow fusion high-efficiency transmission method based on a one-way optical gate, belonging to the technical field of information transmission of the one-way optical gate; the method comprises the following steps: before the optical gate is used for carrying out unidirectional transmission on the data stream, dividing the data stream into a homogeneous data stream and a heterogeneous data stream; carrying out protocol stripping on a source data packet according to the type of the data stream to generate a data packet queue, and recording a data packet sequence number and a corresponding task ID; fusing data packets by different decision strategies for different data packet queues; packaging the fused data packet queue by adopting a one-way optical gate stream transmission packaging protocol; the packaged data packets are sequentially added into a sending queue channel and sent to the inner end of a one-way optical gate through one-way transmission; and carrying out decapsulation, reduction and repackaging on the data packet at the inner end of the optical gate, and sending out the data packet from the network end in the optical gate in sequence to complete the efficient transmission task of the data stream. The invention adopts a data packet fusion strategy and fuses stream data in an optimal mode according to different stream transmission scenes to improve the transmission efficiency.
Description
Technical Field
The invention relates to a safe and efficient transmission method of unidirectional optical gate data flow, in particular to a data flow fusion efficient transmission method based on a unidirectional optical gate, and belongs to the technical field of unidirectional optical gate information transmission.
Background
With the rapid development of communication technology and network technology, the computer informatization construction of organs, enterprises and public institutions and group organizations is promoted comprehensively, but a plurality of network security problems are caused, and network attack means such as flood, interception, trojan, counterfeiting, virus, vulnerability and the like are layered on the internet, so that the direct loss caused by the occurrence of data leakage and data stealing events seriously harms security, social stability and public interests. The use of unidirectional optical gates to transmit data between a confidential network and a non-confidential network is therefore one of the effective ways to address such problems.
The optical gate is called a unidirectional isolation optical gate system, the problems in the prior art mainly focus on the efficiency and reliability of unidirectional transmission, and the unidirectional transmission is premised on the absolute absence of a dark reflux channel, so that after data messages are sent, whether an opposite end really receives the messages cannot be known.
In order to solve the problem, a common method is to sacrifice part of bandwidth to be used for transmitting data messages for multiple times or add redundancy to reduce the unreliability of unidirectional transmission, but the bandwidth loss caused by the method has more obvious influence under the condition of large-flow transmission.
Therefore, there is a need for a transmission method that can improve transmission efficiency with a fixed amount of bandwidth and error correction that is not discardable.
Disclosure of Invention
The purpose of the invention is: the method comprises the steps of setting a decision mechanism for isomorphic and heterogeneous data stream fusion, enabling a data packet to fuse stream data in an optimal mode according to different stream transmission scenes for efficient transmission, combining a one-way optical shutter stream transmission isomorphic and heterogeneous packet protocols, enabling the one-way transmission process to bear transmission of more useful stream data information to the maximum extent, and accordingly improving transmission efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme: a data flow fusion efficient transmission method based on a one-way optical gate comprises the following steps:
s1, before unidirectional transmission is carried out on source content of data streams by using an optical gate, according to the type and the number of application types contained in a data packet in the unidirectional transmission process, the unidirectional transmitted data streams are divided into isomorphic data streams and heterogeneous data streams;
s2, after receiving a source data packet, the outer end of the one-way optical shutter firstly judges the type of the data stream, carries out protocol stripping on the source data packet according to the type of the data stream to leave bare data, constructs and generates a homogeneous data packet queue or a heterogeneous data packet queue through the bare data, and records the sequence number of the data packet and the corresponding task ID;
s3, allocating different decision strategies according to the tasks of the homogeneous data packet queues or the heterogeneous data packet queues obtained in the step S2 by a decision mechanism, and fusing corresponding data packets according to different data flow, data packet sizes and adjacent data packet types by the different decision strategies;
s4, packaging the heterogeneous data packet queue which is screened and fused in the step S3 by adopting a one-way optical gate stream transmission heterogeneous packet protocol to generate a new heterogeneous data packet; packaging the isomorphic data packet queues which are screened and fused in the step S3 by adopting a one-way optical gate stream transmission isomorphic packet protocol to generate a new isomorphic data packet;
s5, adding the new heterogeneous data packets or the homogeneous data packets packaged in the step S4 into a sending queue channel in sequence for waiting sending, and sending the new heterogeneous data packets or the homogeneous data packets to the inner end of the one-way optical gate through one-way transmission;
s6, storing the heterogeneous data packets or the homogeneous data packets reaching the inner end of the one-way optical gate in the step S5 in a receiving queue channel, decapsulating the data packets of the heterogeneous data packets or the homogeneous data packets according to the protocol corresponding to the packets in the step S4, and repackaging each data packet according to the original protocol of the data packet restored by the task complete information corresponding to the task ID in the step S2;
and S7, the heterogeneous data packets or the homogeneous data packets which are unpacked, restored and repackaged at the inner end of the unidirectional optical gate in the step S6 are sent out from the inner network end of the optical gate in sequence, and the task of efficiently transmitting the data stream is completed.
In the step S1, the application type of the data packet includes streaming media live broadcast, a database operation instruction, and a system instruction.
In the step S1, the homogeneous data stream is a data stream in which the data packet only contains one application type and the protocol, length, and structure are the same in the unidirectional transmission process; the heterogeneous data stream is a data stream in which data packets contain multiple application types and one or more of protocol types, lengths and structures of the data packets are different in a unidirectional transmission process.
In the step S3, the fusion Decision policy of the data packet adopts multiple forms, and different Decision policies include Time-sensitive Decision, TSD, length-sensitive Decision, LSD, category-sensitive Decision, and CSD, where live streaming is a Time-sensitive Decision, a database operation instruction is a Length-sensitive Decision, and a system instruction is a type-sensitive Decision.
In step S4, according to the communication efficiency and the transmission delay, the optimal value parameter of the maximum transmission unit MTU transmitted by the optical gate in one direction is used as a reference point for the size of the new packet after fusion and encapsulation.
In the step S4, the new isomorphic data packet after protocol encapsulation comprises the fusion packet attribute of the first two bytes, the check bit of the 3 rd to 4 th bytes, the original data packet marking bit type queue and the storage data space of the residual bytes; the attribute of the fusion packet comprises type coding and quantity coding, an original data packet marking bit type queue comprises a plurality of task IDs and packet lengths, and the total length of the original data packet marking bit type queue = (4 byte packet length +2 byte task ID) x the number of the fusion packets.
In the step S4, the new isomorphic data package after encapsulation comprises the fusion package attribute of the first two bytes, the check bit of the 3 rd to 4 th bytes, the original data package length of the 5 th to 8 th bytes, the task ID of the 9 th to 10 th bytes and the storage data space of the residual bytes; wherein the fused packet attribute comprises a type code and a quantity code.
The beneficial effects of the invention are:
1) The invention enables the data packet to fuse the streaming data in an optimal mode for efficient transmission according to different streaming scenes by setting a decision mechanism for isomorphic and heterogeneous data stream fusion, and enables the transmission of more useful streaming data information to be borne to the maximum extent in the unidirectional transmission process by combining a unidirectional optical gate stream transmission isomorphic and heterogeneous packet protocols, thereby improving the transmission efficiency.
2) The invention improves the transmission efficiency of one-way transmission in the optical gate around the transmission process of the one-way optical gate flow, reduces the inter-packet waiting time by realizing the fusion transmission mode of heterogeneous data flow, and obviously improves the transmission efficiency when transmitting large-flow small data packets.
3) The method of the invention designs a novel private transmission protocol: the data packet after being packaged comprises information such as various heterogeneous data packet bare data, identification bits and the like, so that the data packet can be resolved into a source data packet again after being transmitted to the inner end of the optical shutter in a single direction, and the accuracy of data packet transmission is ensured.
4) The method of the present invention can be used with various error correction coding and retransmission strategies to reduce the number of transmitted packets, thereby improving the transmission efficiency.
Drawings
Fig. 1 is a flow chart of unidirectional transmission and forwarding of homogeneous and heterogeneous data streams in the method of the present invention;
FIG. 2 is a diagram of a structure of a one-way optical shutter stream transmission heterogeneous packet protocol in the method of the present invention;
FIG. 3 is a diagram of a one-way optical shutter stream transmission isomorphic packet protocol in the method of the present invention.
Detailed Description
The invention is further explained below with reference to the figures and the embodiments.
Example (b): as shown in fig. 1-3, the present invention provides a data stream fusion efficient transmission method based on a unidirectional optical gate, which includes the following steps:
s1, before unidirectional transmission is carried out on source content of data streams by using an optical gate, as shown in FIG. 1, according to the type and the number of application types contained in a data packet in the unidirectional transmission process, the unidirectional transmitted data streams are divided into homogeneous data streams and heterogeneous data streams.
The application types of the data packet comprise streaming media live broadcast, database operation instructions and system instructions.
The homogeneous data stream is a data stream in which a data packet only contains one application type and the protocol, the length and the structure are the same in the unidirectional transmission process; the heterogeneous data stream is a data stream in which data packets contain multiple application types and one or more of protocol types, lengths and structures of the data packets are different in a unidirectional transmission process.
S2, after receiving the source data packet, the outer end of the one-way optical gate firstly judges the type of the data stream, carries out protocol stripping on the source data packet according to the type of the data stream to leave bare data, creates an isomorphic data packet queue or a heterogeneous data packet queue through the bare data, and records the sequence number of the data packet and the corresponding task ID.
And S3, allocating different decision strategies by a decision mechanism according to the tasks of the homogeneous data packet queues or the heterogeneous data packet queues obtained in the step S2, and fusing corresponding data packets according to different data flow, data packet sizes and adjacent data packet types by the different decision strategies.
The fusion Decision strategy of the data packet adopts various forms, and different Decision strategies comprise Time-sensitive Decision, TSD, length-sensitive Decision, LSD, category-sensitive Decision and CSD, wherein the live broadcast of the streaming media is Time-sensitive Decision, the operation instruction of the database is Length-sensitive Decision, and the system instruction is type-sensitive Decision.
S4, packaging the heterogeneous data packet queues which are screened and fused in the step S3 by adopting a one-way optical gate stream transmission heterogeneous packet protocol to generate new heterogeneous data packets, as shown in the figure 2; and (4) packaging the isomorphic data packet queue which is screened and fused in the step (S3) by adopting a one-way optical shutter stream transmission isomorphic packet protocol to generate a new isomorphic data packet, as shown in fig. 3.
According to the factors of communication efficiency and transmission delay, the optimal value parameter of the maximum transmission unit MTU transmitted by the optical gate in one direction is used as a reference point of the size of the new data packet after fusion and encapsulation, and the optimal value parameter of the maximum transmission unit MTU has a certain difference according to the different number of the fused heterogeneous data packets.
The new isomorphic data packet after protocol encapsulation comprises the fusion packet attribute of the first two bytes, check bits of 3-4 bytes, a mark bit type queue of the original data packet and a storage data space of the residual bytes; the attribute of the fused packet comprises type coding and quantity coding, the original data packet marking bit class queue comprises a plurality of task IDs and packet lengths, and the total length of the original data packet marking bit class queue = (4 bytes packet length +2 bytes task ID) multiplied by the quantity of the fused packets.
The new isomorphic data package after encapsulation comprises the fusion package attribute of the first two bytes, check bits of 3-4 bytes, the original data package length of 5-8 bytes, a task ID of 9-10 bytes and a storage data space of the residual bytes; the fused packet attribute comprises type coding and quantity coding, and the check bit is used for checking the integrity of the data packet.
And S5, adding the new heterogeneous data packets or homogeneous data packets packaged in the step S4 into a sending queue channel in sequence, waiting for sending, and sending to the inner end of the one-way optical gate through one-way transmission.
And S6, storing the heterogeneous data packets or the homogeneous data packets reaching the inner end of the one-way optical gate in the receiving queue channel in the step S5, respectively decapsulating the data packet data of the heterogeneous data packets or the homogeneous data packets according to the protocol corresponding to the packets in the step S4, and repackaging each data packet according to the original protocol of the data packet restored by all the task information corresponding to the task ID in the step S2.
In the data packet analysis process, according to the task ID carried in the protocol, the optical shutter system is searched for the corresponding relation in the task list sent to the inner end in advance to carry out repackaging operation of the TCP/UDP protocol or execute other subsequent tasks.
And S7, the heterogeneous data packets or the homogeneous data packets which are unpacked, restored and repackaged at the inner end of the unidirectional optical gate in the step S6 are sent out from the inner network end of the optical gate in sequence, and the task of efficiently transmitting the data stream is completed.
For important data, a multi-time transmission mode or a forward error correction coding mode can be adopted to improve the reliability of transmission, and the loss of inter-packet time intervals caused by data redundancy can be effectively reduced by matching the invention.
The invention enables the data packet to fuse the streaming data in an optimal mode for high-efficiency transmission according to different streaming scenes by setting a decision mechanism for merging the isomorphic data stream and the heterogeneous data stream, and enables the transmission of more useful streaming data information to be borne to the greatest extent in the unidirectional transmission process by combining the unidirectional optical gate streaming isomorphic and heterogeneous packet protocols, thereby improving the transmission efficiency.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. A data flow fusion efficient transmission method based on a one-way optical gate is characterized in that: the method comprises the following steps:
s1, before unidirectional transmission is carried out on source content of data streams by using an optical gate, according to the type and the number of application types contained in a data packet in the unidirectional transmission process, the unidirectional transmitted data streams are divided into isomorphic data streams and heterogeneous data streams;
s2, after receiving a source data packet, the outer end of the one-way optical gate firstly judges the type of the data stream, carries out protocol stripping on the source data packet according to the type of the data stream to leave bare data, creates an isomorphic data packet queue or a heterogeneous data packet queue through the bare data, and records the sequence number of the data packet and a corresponding task ID;
s3, allocating different decision strategies according to the tasks where the isomorphic data packet queues or the heterogeneous data packet queues obtained in the step S2 are located by a decision mechanism, and fusing corresponding data packets according to different data flow, data packet sizes and adjacent data packet types by the different decision strategies;
s4, packaging the heterogeneous data packet queues which are screened and fused in the step S3 by adopting a one-way optical gate stream transmission heterogeneous packet protocol to generate new heterogeneous data packets; packaging the isomorphic data packet queues which are screened and fused in the step S3 by adopting a one-way optical gate stream transmission isomorphic packet protocol to generate a new isomorphic data packet;
s5, adding the new heterogeneous data packets or homogeneous data packets packaged in the step S4 into a sending queue channel in sequence, waiting for sending, and sending to the inner end of a one-way optical gate through one-way transmission;
s6, storing the heterogeneous data packets or the homogeneous data packets reaching the inner end of the one-way optical gate in the step S5 in a receiving queue channel, respectively decapsulating the heterogeneous data packets or the homogeneous data packets according to the protocol corresponding to the packets in the step S4, and repackaging each data packet according to the original protocol of the data packet restored by all the task information corresponding to the task ID in the step S2;
and S7, the heterogeneous data packets or the homogeneous data packets which are unpacked, restored and repackaged at the inner end of the unidirectional optical gate in the step S6 are sent out from the inner network end of the optical gate in sequence, and the task of efficiently transmitting the data stream is completed.
2. The efficient transmission method of claim 1, wherein: in the step S1, the application type of the data packet includes streaming media live broadcast, a database operation instruction, and a system instruction.
3. The efficient transmission method of claim 2, wherein: in the step S1, the homogeneous data stream is a data stream in which the data packet only contains one application type and the protocol, length, and structure are the same in the unidirectional transmission process; the heterogeneous data stream is a data stream in which data packets include multiple application types and one or more of protocol types, lengths, and structures of the data packets are different in a unidirectional transmission process.
4. The efficient transmission method of claim 2, wherein: in the step S3, the fusion Decision policy of the data packet adopts multiple forms, and different Decision policies include Time-sensitive Decision, TSD, length-sensitive Decision, LSD, category-sensitive Decision, and CSD, where live streaming is a Time-sensitive Decision, a database operation instruction is a Length-sensitive Decision, and a system instruction is a type-sensitive Decision.
5. The efficient transmission method of claim 1, wherein: in step S4, according to the communication efficiency and the transmission delay factor, the optimal value parameter of the maximum transmission unit MTU transmitted by the optical gate in one direction is used as a reference point for the size of the new packet after fusion encapsulation.
6. The efficient transmission method of claim 1, wherein: in the step S4, the new isomorphic data packet after protocol encapsulation includes the fusion packet attribute of the first two bytes, the check bit of the 3 rd to 4 th bytes, the original data packet flag bit queue and the storage data space of the remaining bytes; the attribute of the fusion packet comprises type coding and quantity coding, an original data packet marking bit type queue comprises a plurality of task IDs and packet lengths, and the total length of the original data packet marking bit type queue = (4 byte packet length +2 byte task ID) x the number of the fusion packets.
7. The efficient transmission method of claim 1, wherein: in the step S4, the new isomorphic data packet after encapsulation includes the fusion packet attribute of the first two bytes, the check bit of the 3 rd to 4 th bytes, the original data packet length of the 5 th to 8 th bytes, the task ID of the 9 th to 10 th bytes, and the storage data space of the remaining bytes; wherein the fused packet attribute comprises a type code and a quantity code.
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