CN115174159B - Communication model, data transmission method and device and communication model configuration method - Google Patents
Communication model, data transmission method and device and communication model configuration method Download PDFInfo
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- CN115174159B CN115174159B CN202210674694.1A CN202210674694A CN115174159B CN 115174159 B CN115174159 B CN 115174159B CN 202210674694 A CN202210674694 A CN 202210674694A CN 115174159 B CN115174159 B CN 115174159B
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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
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
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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
- H04L63/12—Applying verification of the received information
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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
- H04L63/16—Implementing security features at a particular protocol layer
Abstract
The invention provides a communication model, a data transmission method and device and a communication model configuration method, wherein the communication model comprises the following steps: an application layer for inputting or outputting communication data; the capacity expansion layer is used for carrying out data transmission with the application layer based on the capacity expansion primitive under the condition that the length of a data packet in the application layer exceeds the data capacity; the expansion layer comprises any one of the following: a newly added protocol stack; and splitting the protocol stack from the application layer. The communication model, the data transmission method and the device and the communication model configuration method provided by the invention have the advantages that the upper limit of the capacity of data transmission is improved, and the flexibility of data transmission is improved.
Description
Technical Field
The present invention relates to the field of computer technologies, and in particular, to a communication model, a data transmission method and apparatus, and a communication model configuration method.
Background
With the updating of equipment, more and more safety data are available, and when different safety signal equipment in train operation is communicated, the traditional RSSP-I protocol is used, the length of real-time safety data is limited, and the ever-increasing safety requirement cannot be met.
In the prior art, although the RSSP-I protocol can meet the requirement of safe transmission, the real-time safe data in the protocol needs to be smaller than 546bytes, the practical application data size is 480bytes at most, and in the future of information explosion, the protocol cannot meet the requirement of safe running of a train.
Disclosure of Invention
The invention provides a communication model, a data transmission method and device and a communication model configuration method, which are used for solving the technical problem that the data capacity is limited during data transmission in the prior art.
The present invention provides a communication model comprising:
an application layer for inputting or outputting communication data;
the capacity expansion layer is used for carrying out data transmission with the application layer based on the capacity expansion primitive under the condition that the length of a data packet in the application layer exceeds the data capacity;
the expansion layer comprises any one of the following:
a newly added protocol stack;
and splitting the protocol stack from the application layer.
The invention also provides a data transmission method, which is applied to the communication model, and in the case that the capacity expansion layer is a newly added protocol stack, the method comprises the following steps:
under the condition that the length of a target data packet output by an application layer of a first terminal exceeds the data capacity is determined, a first data packet is obtained, a first expansion request primitive is output to an expansion layer of the first terminal, the first data packet is input to an expansion layer of a second terminal, and the first data packet is a data packet obtained by dividing the target data packet;
Outputting a first expansion indication primitive to an application layer of the second terminal under the condition that a first data packet received by an expansion layer of the second terminal is determined to be an expansion packet;
outputting a first capacity expansion response primitive to the capacity expansion layer of the second terminal under the condition that the application layer of the second terminal receives the first capacity expansion indication primitive;
and outputting a first expansion verification primitive to an application layer of the first terminal under the condition that the first terminal receives the receipt message of the second terminal.
The invention also provides a data transmission method, which is applied to the communication model, and in the case that the capacity expansion layer is a protocol stack split from the application layer, the method comprises the following steps:
under the condition that the length of a target data packet output by an application layer of a first terminal exceeds the data capacity is determined, a first data packet is obtained, a second expansion request primitive is output to an expansion layer of the first terminal, the first data packet is input to an expansion layer of a second terminal, and the first data packet is a data packet obtained by dividing the target data packet;
and outputting a second expansion indication primitive to an application layer of the second terminal under the condition that the first data packet received by the expansion layer of the second terminal is determined to be the expansion packet.
In some embodiments, the communication model further includes a security layer, the security layer for securing data transmission;
the method further comprises the steps of:
judging whether a second data packet received by a security layer of the second terminal is a repeated packet or not, wherein the second data packet is a data packet except the first data packet in the target data packet;
and when the second data packet received by the security layer of the second terminal is determined to be a non-repeated packet, outputting a second capacity expansion indication primitive to the application layer of the second terminal further comprises:
and splicing the first data packet and the second data packet.
The invention provides a communication model configuration method, which comprises the following steps:
adding a capacity expansion layer between an application layer and a communication layer, wherein the application layer and the capacity expansion layer perform data transmission based on capacity expansion primitives;
newly adding a judging function in the application layer, wherein the judging function is used for judging whether the length of a data packet exceeds the data capacity;
and a check function is newly added in the capacity expansion layer, and the check function is used for checking whether the data packet is a capacity expansion packet or not.
The invention provides a data transmission device, which is applied to the communication model, and the device comprises:
The first transmission module is used for obtaining a first data packet under the condition that the length of a target data packet output by an application layer of a first terminal exceeds the data capacity, outputting a first capacity expansion request primitive to a capacity expansion layer of the first terminal, and inputting the first data packet to a capacity expansion layer of a second terminal, wherein the first data packet is a data packet obtained by dividing the target data packet;
the second transmission module is used for outputting a first expansion indication primitive to the application layer of the second terminal under the condition that the first data packet received by the expansion layer of the second terminal is determined to be an expansion packet;
the third transmission module is used for outputting a first capacity expansion response primitive to the capacity expansion layer of the second terminal under the condition that the application layer of the second terminal receives the first capacity expansion indication primitive;
and the fourth transmission module is used for outputting a first expansion verification primitive to the application layer of the first terminal under the condition that the first terminal receives the receipt message of the second terminal.
The invention provides a data transmission device, which is applied to the communication model, and when the capacity expansion layer is a protocol stack split from the application layer, the device comprises:
A fifth transmission module, configured to obtain a first data packet when it is determined that a target data packet length output by an application layer of a first terminal exceeds the data capacity, output a second expansion request primitive to an expansion layer of the first terminal, and input the first data packet to an expansion layer of a second terminal, where the first data packet is a data packet obtained by dividing the target data packet;
and the sixth transmission module is used for outputting a second expansion indication primitive to the application layer of the second terminal under the condition that the first data packet received by the expansion layer of the second terminal is determined to be the expansion packet.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing any one of the data transmission methods or the communication model configuration methods described above when executing the program.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a data transmission method or a communication model configuration method as described in any of the above.
The invention also provides a computer program product comprising a computer program which when executed by a processor implements a data transmission method or a communication model configuration method as described in any one of the above.
According to the communication model, the data transmission method and device and the communication model configuration method, the problem of limited data length in the existing transmission process can be solved by arranging the capacity expansion layer, the data capacity of real-time transmission can be enlarged, and the flexibility of data transmission is improved.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a communication model according to the present invention;
FIG. 2 is a second schematic diagram of a communication model according to the present invention;
FIG. 3 is a schematic flow chart of a data transmission method according to the present invention;
FIG. 4 is a second flow chart of the data transmission method according to the present invention;
FIG. 5 is a schematic flow chart of a communication model configuration method provided by the invention;
fig. 6 is a schematic structural diagram of a data transmission device according to the present invention;
FIG. 7 is a second schematic diagram of a data transmission device according to the present invention;
fig. 8 is a schematic structural diagram of a communication model configuration apparatus provided by the present invention;
fig. 9 is a schematic diagram of the physical structure of the electronic device provided by the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is a schematic diagram of a communication model according to the present invention. Referring to fig. 1, an embodiment of the present invention provides a communication model, which may include: an application layer and a capacity expansion layer.
The application layer is used for inputting or outputting communication data;
the capacity expansion layer is used for carrying out data transmission with the application layer based on the capacity expansion primitive under the condition that the length of a data packet in the application layer exceeds the data capacity;
in practical implementation, the communication model provided by the invention can be applied to railway signal safety communication protocols, such as railway signal safety communication protocol I (Railway Signal Safety Protpeol I, RSSP-I) and railway signal safety communication protocol II (Railway Signal Safety Protpeol II, RSSP-II).
Taking RSSP-I structure as an example, the communication model provided in this embodiment will be described. As shown in fig. 1, the RSSP-I has an existing structure of an application layer, a security layer, and a communication layer.
The application layer can be used for inputting or outputting communication data for interaction between the vehicle-mounted equipment and the ground equipment;
the security layer can adopt a secure transmission protocol to ensure the information security of the communication data and the transmission security of the communication data. For example: by adopting an RSSP-I security protocol mechanism, the security layer can realize the protection of the communication threat in the transmission system.
The communication layers may include layers other than the application layer in the open systems interconnection communication reference model (Open System Interconnection Reference Model, OSI). The communication layer may provide untrusted transmissions, and may implement the following functions: adaptation of the physical transport layer; redundancy processing functions of the communication link; monitoring the channel availability, and reporting to an external system by an application layer; reliable, transparent and bi-directional transmission of data, etc.
In some embodiments, the application layer may perform functions related to the railway communication system, such as line data, temporary speed limit information, etc.; the safety layer adopts a safety transmission protocol to ensure the information safety of the vehicle-ground communication data and is responsible for the transmission safety of the vehicle-ground communication data. The communication layer is responsible for providing transparent and reliable transmission of data messages, providing forward error correction capability of the messages, or transmitting bit streams on a bottom wireless channel, performing source channel coding, modulation and demodulation, transmitting and receiving signals and the like on wireless data.
In some embodiments, the communication model provided by the embodiment of the present invention further includes a capacity expansion layer. The capacity expansion layer is a newly added protocol stack or a protocol stack split from the application layer.
In the case that the capacity expansion layer is a newly added protocol stack, a communication model provided by the embodiment of the invention is shown in fig. 1. I.e. a capacity expansion layer parallel to the security layer is newly added between the communication layer and the application layer.
In the case that the capacity expansion layer is a protocol stack split from the application layer, the communication model provided by the invention is shown in fig. 2. It is understood that a portion of the application layer is used as a capacity expansion layer, i.e. the application layer is split into sub-application layers and capacity expansion layers.
Adding a capacity expansion primitive between the application layer and the capacity expansion layer, the capacity expansion primitive may include: a capacity expansion request primitive, a capacity expansion instruction primitive, a capacity expansion response primitive, and a capacity expansion verification primitive.
In computers, primitives are divided into four classes: a request (Req) type primitive for a higher layer to request a certain service from a lower layer; a response (Res) type primitive for replying to indicate that an indication primitive from a higher layer has been received; an indication (Ind) type primitive for a layer providing a service to report an action related to a specific service to a higher layer; a validation (Cfm) type primitive, the layer for providing the service validates that a certain action has been completed.
The capacity expansion layer can realize the capacity expansion of communication data of different safety signal devices. The embodiment of the invention not only can meet the transmission of a large amount of real-time safety data, but also can ensure the safety communication of railway signals without affecting the existing structure corresponding to the safety communication protocol of the railway signals as far as possible.
The OSI model is a conceptual model, and is proposed by the international organization for standardization, a standard framework that attempts to interconnect various computers into a network worldwide. OSI divides computer network architecture into the following seven layers: a physical layer, a data link layer, a network layer, a transport layer, a session layer, a presentation layer, and an application layer.
The physical layer provides mechanical, electrical, functional, and procedural conditions for establishing, maintaining, and breaking physical connections.
The data link layer is used for establishing, maintaining and removing the link connection, and realizing the function of error-free transmission.
The network layer specifies protocols for the establishment, maintenance and tear-down of network connections.
The transport layer is used for data transfer control between open systems. The main function is the acknowledgement of the transmission and reception of data between the open systems.
The session layer relies on communication functions below the transport layer to enable data transfer functions to be efficiently performed between open systems.
The presentation layer is used for converting information provided by the application layer into a commonly understood form and providing a unified representation of character codes, data formats, control information formats, encryption and the like.
The application layer is used for realizing information exchange between application processes.
The communication model provided by the invention can solve the problem of limited data length in the existing transmission process by arranging the capacity expansion layer, can enlarge the data capacity of real-time transmission and increases the flexibility of data transmission.
Fig. 3 is a schematic flow chart of a data transmission method provided by the present invention.
Referring to fig. 3, in the case that the capacity expansion layer is a newly added protocol stack, the embodiment of the present invention may provide a data transmission method, which may include the following steps:
step 310, under the condition that the length of a target data packet output by an application layer of a first terminal exceeds the data capacity, a first data packet is obtained, a first expansion request primitive is output to an expansion layer of the first terminal, the first data packet is input to an expansion layer of a second terminal, and the first data packet is a data packet obtained by dividing the target data packet;
step 320, outputting a first expansion indication primitive to an application layer of the second terminal when the first data packet received by the expansion layer of the second terminal is determined to be an expansion packet;
Step 330, outputting a first capacity expansion response primitive to the capacity expansion layer of the second terminal under the condition that the application layer of the second terminal receives the first capacity expansion instruction primitive;
step 340, in case it is determined that the first terminal receives the receipt message of the second terminal, outputting the first expansion verification primitive to the application layer of the first terminal.
The first terminal is a data output end, and the second terminal is a data input end. And the first terminal outputs the data and inputs the data to the second terminal.
The structure of the data input and the data output may be a layer-by-layer corresponding structure, and in this embodiment, the data input and the data output have the same communication model. For example: the data of the application layer in the data output may be transferred to the application layer of the data input, and the data of the security layer in the data output may be transferred to the security layer of the data input.
The data input end and each layer of the data output end adopt a preset interface protocol for data transmission, and are not particularly limited herein. For example, it may include:
the application layer of the data input end and the application layer of the data output end adopt the same application layer protocol, and the security layer of the data input end and the security layer of the data output end adopt a security protocol mechanism and the like.
The execution subject of the data transmission method provided by the invention can be an electronic device, a component in the electronic device, an integrated circuit, or a chip. The electronic device may be a mobile electronic device or a non-mobile electronic device. By way of example, the mobile electronic device may be a cell phone, tablet computer, notebook computer, palm top computer, vehicle mounted electronic device, wearable device, ultra-mobile personal computer (ultra-mobile personal computer, UMPC), netbook or personal digital assistant (personal digital assistant, PDA), etc., and the non-mobile electronic device may be a server, network attached storage (Network Attached Storage, NAS), personal computer (personal computer, PC), etc., the invention is not limited in particular.
The technical scheme of the invention is described in detail below by taking a computer to execute the data transmission method provided by the invention as an example.
In actual execution, writing a judging function in an application layer of a data output end, when the length of a target data packet output by the application layer of the data output end exceeds a limit, dividing the target data packet, and outputting a first expansion request primitive to an expansion layer of the data output end so as to increase the output of the expansion layer of the data output end.
The data capacity of the data packet may be determined according to the actual situation of the communication model, which is not particularly limited herein.
It can be understood that the splitting of the target data packet may be to split a portion exceeding the data capacity of the application layer to obtain the first data packet; the first packet may be obtained by performing free division according to a specification of the communication protocol. The first data packet is a data packet segmented from the target data packet and is output through the capacity expansion layer of the data output end. The portion of the target packet other than the first packet is still output through the application layer.
When the capacity expansion layer of the data input end receives the first data packet, judging whether the received data packet is a repeated packet or a capacity expansion packet through a check function. And outputting a first capacity expansion indication primitive to an application layer of the data input terminal under the condition that the first data packet is determined to be a capacity expansion packet. If it is a duplicate packet, the duplicate packet may be discarded.
When the security layer of the data input end receives the data packet, judging whether the received data packet is a non-repeated packet or not through a check function. If the packet is a non-repeated packet, continuing to transmit data. If it is a duplicate packet, the duplicate packet may be discarded.
And the application layer of the data input end receives the first capacity expansion instruction primitive, and outputs a first capacity expansion response primitive to the capacity expansion layer of the data input end.
And when the data output end receives receipt information of the data input end, outputting a first expansion confirmation primitive to the data output end application layer. Wherein the receipt information is used to indicate whether the data transmission is completed.
According to the data transmission method provided by the invention, the problem of limited data in the existing transmission process is solved by adding the capacity expansion layer, so that the data capacity of real-time transmission can be enlarged; and simultaneously, a capacity expansion request primitive, a capacity expansion indication primitive, a capacity expansion response primitive and a capacity expansion confirmation primitive are added to assist the original security layer in data transmission, so that the flexibility of data transmission is improved.
Fig. 4 is a second flow chart of the data transmission method provided by the invention.
Referring to fig. 4, in the case that the capacity expansion layer is a protocol stack split from the application layer, the embodiment of the present invention may provide a data transmission method, which may include the following steps:
step 410, under the condition that the length of the target data packet output by the application layer of the first terminal exceeds the data capacity, obtaining a first data packet, outputting a second expansion request primitive to the expansion layer of the first terminal, inputting the first data packet to the expansion layer of the second terminal, wherein the first data packet is a data packet obtained by dividing the target data packet;
Step 420, outputting a second expansion indication primitive to an application layer of the second terminal when it is determined that the first data packet received by the expansion layer of the second terminal is the expansion packet.
The first terminal is a data output end, and the second terminal is a data input end. And the first terminal outputs the data and inputs the data to the second terminal.
The structure of the data input and the data output may be a layer-by-layer corresponding structure, and in this embodiment, the data input and the data output have the same communication model.
The execution subject of the data transmission method provided by the invention can be an electronic device, a component in the electronic device, an integrated circuit, or a chip. The electronic device may be a mobile electronic device or a non-mobile electronic device. By way of example, the mobile electronic device may be a cell phone, tablet computer, notebook computer, palm top computer, vehicle mounted electronic device, wearable device, ultra-mobile personal computer (ultra-mobile personal computer, UMPC), netbook or personal digital assistant (personal digital assistant, PDA), etc., and the non-mobile electronic device may be a server, network attached storage (Network Attached Storage, NAS), personal computer (personal computer, PC), etc., the invention is not limited in particular.
The technical scheme of the invention is described in detail below by taking a computer to execute the data transmission method provided by the invention as an example.
In actual execution, a judging function is written at an application layer of the data output end, and when the length of a target data packet output by the application layer of the data output end exceeds a limit, the target data packet is divided.
Since RSSP-I is a user datagram protocol (User Datagram Protocol, UDP) transport and, in this embodiment, uses a portion of the application layer as the expansion layer, only the expansion request primitive and the expansion indication primitive are used
In actual execution, writing a judging function in an application layer of the data output end, when the length of a target data packet output by the application layer of the data output end exceeds a limit, dividing the target data packet, and outputting a second expansion request primitive to an expansion layer of the data output end so as to increase the output of the expansion layer of the data output end.
The data capacity of the data packet may be determined according to the actual situation of the communication model, which is not particularly limited herein.
It can be understood that the splitting of the target data packet may be to split a portion exceeding the data capacity of the application layer to obtain the first data packet; the first packet may be obtained by performing free division according to a specification of the communication protocol. The first data packet is a data packet segmented from the target data packet and is output through the capacity expansion layer of the data output end. The portion of the target packet other than the first packet is still output through the application layer.
When the capacity expansion layer of the data input end receives the first data packet, judging whether the received data packet is a repeated packet or a capacity expansion packet through a check function. And outputting a second expansion indication primitive to an application layer of the data input terminal under the condition that the first data packet is determined to be the expansion packet.
According to the data transmission method provided by the invention, the problem of limited data in the existing transmission process is solved by adding the capacity expansion layer, so that the data capacity of real-time transmission can be enlarged; and simultaneously, a capacity expansion request primitive and a capacity expansion indication primitive are added to assist the original security layer in data transmission, so that the flexibility of data transmission is improved.
In some embodiments, the communication model further includes a security layer for securing data transmissions. The data transmission method further comprises the following steps:
judging whether a second data packet received by a security layer of the second terminal is a repeated packet or not, wherein the second data packet is a data packet except the first data packet in a target data packet;
and outputting a second expansion indication primitive to an application layer of the second terminal under the condition that the second data packet received by the security layer of the second terminal is determined to be a non-repeated packet, wherein the method further comprises the following steps:
and splicing the first data packet and the second data packet.
When the security layer and the capacity expansion layer of the data input end respectively receive the data packets, the capacity expansion layer receives the first data packet, and the security layer receives the second data packet. The first data packet and the second data packet are obtained by dividing the target data packet of the data output end.
When the security layer of the data input end receives the second data packet, the second data packet is also judged based on the check function, whether the second data packet is a repeated packet is judged, and if the second data packet is a non-repeated packet, data transmission is continued. If it is a duplicate packet, the duplicate packet may be discarded.
And outputting a capacity expansion indication primitive to an application layer under the condition that the second data packet received by the security layer of the second terminal is determined to be a non-repeated packet and the first data packet received by the capacity expansion layer of the data input end is determined to be a capacity expansion packet, and splicing the first data packet and the second data packet.
In some embodiments, when the in-vehicle device and the train automatic monitoring system (Automatic Train Supervision, ATS) device perform a large amount of data transmission, since the application layer is already split into the capacity expansion layer and the sub-application layer, the information output party determines whether the data packet of the sub-application layer exceeds the limit during the large amount of data transmission.
When the limit is exceeded, the data packet in the application layer of the information output party is firstly divided, and a capacity expansion request primitive is output to the capacity expansion layer of the information output party, so that the output of the capacity expansion layer is increased.
And judging whether the data packet received by the security layer of the information input party is a repeated packet or not, and judging whether the data packet received in the capacity expansion layer is a capacity expansion packet or a repeated packet or not. If the data packet received in the security layer is a non-repeated packet and the data packet received in the capacity expansion layer is a capacity expansion packet, outputting a capacity expansion indication primitive to the sub-application layer, and finally splicing the data packet in the sub-application layer and the data packet in the capacity expansion layer together.
The data transmission method provided by the invention increases the flexibility of data transmission on the basis of not affecting the data transmission safety.
Fig. 5 is a schematic flow chart of a communication model configuration method provided by the invention.
Referring to fig. 5, an embodiment of the present invention may provide a communication model configuration method, which may include the steps of:
step 510, adding a capacity expansion layer between the application layer and the communication layer, wherein the application layer and the capacity expansion layer perform data transmission based on capacity expansion primitives;
step 520, adding a judging function in the application layer, wherein the judging function is used for judging whether the length of the data packet exceeds the data capacity;
Step 530, adding a check function in the capacity expansion layer, where the check function is used to check whether the data packet is a capacity expansion packet.
The execution subject of the communication model configuration method provided by the invention can be an electronic device, a component in the electronic device, an integrated circuit, or a chip. The electronic device may be a mobile electronic device or a non-mobile electronic device. By way of example, the mobile electronic device may be a cell phone, tablet computer, notebook computer, palm top computer, vehicle mounted electronic device, wearable device, ultra-mobile personal computer (ultra-mobile personal computer, UMPC), netbook or personal digital assistant (personal digital assistant, PDA), etc., and the non-mobile electronic device may be a server, network attached storage (Network Attached Storage, NAS), personal computer (personal computer, PC), etc., the invention is not limited in particular.
The following describes the technical scheme of the present invention in detail by taking a computer to execute the communication model configuration method provided by the present invention as an example.
In actual implementation, adding a capacity expansion layer between the application layer and the communication layer may be adding a protocol stack between the application layer and the communication layer, which is used as the capacity expansion layer; it is also possible to use a part of the application layer as a capacity expansion layer.
And adding a capacity expansion primitive between the application layer and the capacity expansion layer. The expansion primitives may include an expansion request primitive, an expansion indication primitive, an expansion response primitive, and an expansion confirm primitive.
And writing a judging function in the application layer, and when the data packet of the application layer exceeds the data capacity, dividing the data packet in the application layer.
And respectively adding a check function in the security layer and the capacity expansion layer, and judging whether the data packet is a repeated packet when the security layer receives the data packet. When the capacity expansion layer receives the data packet, judging whether the data packet is a repeated packet or a capacity expansion packet.
The communication model configuration method provided by the invention can enlarge the data capacity of real-time transmission and can solve the problem of limited data capacity in the existing data transmission process.
The data transmission device provided by the invention is described below, and the data transmission device described below and the data transmission method described above can be referred to correspondingly.
Fig. 6 is a schematic structural diagram of a data transmission device provided by the present invention. The present invention may provide a data transmission apparatus, which may include:
a first transmission module 610, configured to obtain a first data packet when it is determined that a target data packet length output by an application layer of a first terminal exceeds the data capacity, output a first expansion request primitive to an expansion layer of the first terminal, and input the first data packet to an expansion layer of a second terminal, where the first data packet is a data packet obtained by dividing the target data packet;
A second transmission module 620, configured to output a first expansion indication primitive to an application layer of the second terminal when it is determined that the first data packet received by the expansion layer of the second terminal is an expansion packet;
a third transmission module 630, configured to output a first capacity expansion response primitive to the capacity expansion layer of the second terminal when it is determined that the application layer of the second terminal receives the first capacity expansion indication primitive;
and a fourth transmission module 640, configured to output a first expansion verification primitive to an application layer of the first terminal if it is determined that the first terminal receives the receipt message of the second terminal.
According to the data transmission device provided by the invention, the problem of limited data in the existing transmission process is solved by adding the capacity expansion layer, so that the data capacity of real-time transmission can be enlarged; and simultaneously, a capacity expansion request primitive, a capacity expansion indication primitive, a capacity expansion response primitive and a capacity expansion confirmation primitive are added to assist the original security layer in data transmission, so that the flexibility of data transmission is improved.
Fig. 7 is a second schematic structural diagram of the data transmission device provided by the present invention. The present invention may provide a data transmission apparatus, which may include:
A fifth transmission module 710, configured to obtain a first data packet when it is determined that a target data packet length output by an application layer of a first terminal exceeds the data capacity, output a second expansion request primitive to an expansion layer of the first terminal, and input the first data packet to an expansion layer of a second terminal, where the first data packet is a data packet obtained by dividing the target data packet;
and a sixth transmission module 720, configured to output a second expansion indication primitive to an application layer of the second terminal when it is determined that the first data packet received by the expansion layer of the second terminal is an expansion packet.
According to the data transmission device provided by the invention, the problem of limited data in the existing transmission process is solved by adding the capacity expansion layer, so that the data capacity of real-time transmission can be enlarged; and simultaneously, a capacity expansion request primitive and a capacity expansion indication primitive are added to assist the original security layer in data transmission, so that the flexibility of data transmission is improved.
In some embodiments, the communication model further includes a security layer, the security layer for securing data transmission;
the apparatus further comprises:
a seventh transmission module, configured to determine whether a second data packet received by the security layer of the second terminal is a duplicate packet, where the second data packet is a data packet other than the first data packet in the target data packet;
And outputting a second capacity expansion indication primitive to an application layer of the second terminal under the condition that the second data packet received by the security layer of the second terminal is determined to be a non-repeated packet, wherein the method further comprises the following steps:
and splicing the first data packet and the second data packet.
The communication model configuration device provided by the invention is described below, and the communication model configuration device described below and the communication model configuration method described above can be referred to correspondingly to each other.
Fig. 8 is a schematic structural diagram of a communication model configuration device provided by the present invention. The present invention may provide a communication model configuration apparatus, which may include:
a first configuration module 810, configured to add a capacity expansion layer between an application layer and a communication layer, where the application layer and the capacity expansion layer perform data transmission based on capacity expansion primitives;
a second configuration module 820, configured to add a judging function to the application layer, where the judging function is used to judge whether the length of the data packet exceeds the data capacity;
and a third configuration module 830, configured to add a check function to the capacity expansion layer, where the check function is used to check whether the data packet is a capacity expansion packet.
The communication model configuration device provided by the invention can enlarge the data capacity of real-time transmission and can solve the problem of limited data capacity in the existing data transmission process.
Fig. 9 illustrates a physical schematic diagram of an electronic device, as shown in fig. 9, which may include: processor 910, communication interface (Communications Interface), memory 930, and communication bus 940, wherein processor 910, communication interface 920, and memory 930 communicate with each other via communication bus 940. The processor 910 may call logic instructions in the memory 930 to perform a data transmission method, where the capacity expansion layer is a newly added protocol stack, the method includes:
under the condition that the length of a target data packet output by an application layer of a first terminal exceeds the data capacity is determined, a first data packet is obtained, a first expansion request primitive is output to an expansion layer of the first terminal, the first data packet is input to an expansion layer of a second terminal, and the first data packet is a data packet obtained by dividing the target data packet;
outputting a first expansion indication primitive to an application layer of the second terminal under the condition that a first data packet received by an expansion layer of the second terminal is determined to be an expansion packet;
outputting a first capacity expansion response primitive to the capacity expansion layer of the second terminal under the condition that the application layer of the second terminal receives the first capacity expansion indication primitive;
And outputting a first expansion verification primitive to an application layer of the first terminal under the condition that the first terminal receives the receipt message of the second terminal.
Or in the case that the capacity expansion layer is a newly added protocol stack, the method comprises the following steps:
under the condition that the length of a target data packet output by an application layer of a first terminal exceeds the data capacity is determined, a first data packet is obtained, a second expansion request primitive is output to an expansion layer of the first terminal, the first data packet is input to an expansion layer of a second terminal, and the first data packet is a data packet obtained by dividing the target data packet;
and outputting a second expansion indication primitive to an application layer of the second terminal under the condition that the first data packet received by the expansion layer of the second terminal is determined to be the expansion packet.
Or performing a communication model configuration method comprising:
adding a capacity expansion layer between an application layer and a communication layer, wherein the application layer and the capacity expansion layer perform data transmission based on capacity expansion primitives;
newly adding a judging function in the application layer, wherein the judging function is used for judging whether the length of a data packet exceeds the data capacity;
and a check function is newly added in the capacity expansion layer, and the check function is used for checking whether the data packet is a capacity expansion packet or not.
Further, the logic instructions in the memory 930 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention further provides a computer program product, where the computer program product includes a computer program, where the computer program can be stored on a non-transitory computer readable storage medium, and when the computer program is executed by a processor, the computer is capable of executing a data transmission method provided by the above methods, where the capacity expansion layer is a newly added protocol stack, and the method includes:
Under the condition that the length of a target data packet output by an application layer of a first terminal exceeds the data capacity is determined, a first data packet is obtained, a first expansion request primitive is output to an expansion layer of the first terminal, the first data packet is input to an expansion layer of a second terminal, and the first data packet is a data packet obtained by dividing the target data packet;
outputting a first expansion indication primitive to an application layer of the second terminal under the condition that a first data packet received by an expansion layer of the second terminal is determined to be an expansion packet;
outputting a first capacity expansion response primitive to the capacity expansion layer of the second terminal under the condition that the application layer of the second terminal receives the first capacity expansion indication primitive;
and outputting a first expansion verification primitive to an application layer of the first terminal under the condition that the first terminal receives the receipt message of the second terminal.
Or in the case that the capacity expansion layer is a newly added protocol stack, the method comprises the following steps:
under the condition that the length of a target data packet output by an application layer of a first terminal exceeds the data capacity is determined, a first data packet is obtained, a second expansion request primitive is output to an expansion layer of the first terminal, the first data packet is input to an expansion layer of a second terminal, and the first data packet is a data packet obtained by dividing the target data packet;
And outputting a second expansion indication primitive to an application layer of the second terminal under the condition that the first data packet received by the expansion layer of the second terminal is determined to be the expansion packet.
Or performing a communication model configuration method comprising:
adding a capacity expansion layer between an application layer and a communication layer, wherein the application layer and the capacity expansion layer perform data transmission based on capacity expansion primitives;
newly adding a judging function in the application layer, wherein the judging function is used for judging whether the length of a data packet exceeds the data capacity;
and a check function is newly added in the capacity expansion layer, and the check function is used for checking whether the data packet is a capacity expansion packet or not.
In still another aspect, the present invention further provides a non-transitory computer readable storage medium, on which a computer program is stored, the computer program being implemented when executed by a processor to perform the data transmission method provided by the above methods, where the capacity expansion layer is a newly added protocol stack, the method includes:
under the condition that the length of a target data packet output by an application layer of a first terminal exceeds the data capacity is determined, a first data packet is obtained, a first expansion request primitive is output to an expansion layer of the first terminal, the first data packet is input to an expansion layer of a second terminal, and the first data packet is a data packet obtained by dividing the target data packet;
Outputting a first expansion indication primitive to an application layer of the second terminal under the condition that a first data packet received by an expansion layer of the second terminal is determined to be an expansion packet;
outputting a first capacity expansion response primitive to the capacity expansion layer of the second terminal under the condition that the application layer of the second terminal receives the first capacity expansion indication primitive;
and outputting a first expansion verification primitive to an application layer of the first terminal under the condition that the first terminal receives the receipt message of the second terminal.
Or in the case that the capacity expansion layer is a newly added protocol stack, the method comprises the following steps:
under the condition that the length of a target data packet output by an application layer of a first terminal exceeds the data capacity is determined, a first data packet is obtained, a second expansion request primitive is output to an expansion layer of the first terminal, the first data packet is input to an expansion layer of a second terminal, and the first data packet is a data packet obtained by dividing the target data packet;
and outputting a second expansion indication primitive to an application layer of the second terminal under the condition that the first data packet received by the expansion layer of the second terminal is determined to be the expansion packet.
Or performing a communication model configuration method comprising:
adding a capacity expansion layer between an application layer and a communication layer, wherein the application layer and the capacity expansion layer perform data transmission based on capacity expansion primitives;
newly adding a judging function in the application layer, wherein the judging function is used for judging whether the length of a data packet exceeds the data capacity;
and a check function is newly added in the capacity expansion layer, and the check function is used for checking whether the data packet is a capacity expansion packet or not.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A data transmission method, characterized by being applied to a communication model, the communication model comprising:
an application layer for inputting or outputting communication data;
the capacity expansion layer is used for carrying out data transmission with the application layer based on the capacity expansion primitive under the condition that the length of a data packet in the application layer exceeds the data capacity;
the expansion layer comprises any one of the following:
a newly added protocol stack;
splitting a protocol stack from the application layer;
the capacity expansion primitive includes: a capacity expansion request primitive, a capacity expansion instruction primitive, a capacity expansion response primitive and a capacity expansion verification primitive;
in the case that the capacity expansion layer is a newly added protocol stack, the method includes:
Under the condition that the length of a target data packet output by an application layer of a first terminal exceeds the data capacity is determined, a first data packet is obtained, a first expansion request primitive is output to an expansion layer of the first terminal, the first data packet is input to an expansion layer of a second terminal, and the first data packet is a data packet obtained by dividing the target data packet;
outputting a first expansion indication primitive to an application layer of the second terminal under the condition that a first data packet received by an expansion layer of the second terminal is determined to be an expansion packet;
outputting a first capacity expansion response primitive to the capacity expansion layer of the second terminal under the condition that the application layer of the second terminal receives the first capacity expansion indication primitive;
and outputting a first expansion verification primitive to an application layer of the first terminal under the condition that the first terminal receives the receipt message of the second terminal.
2. A data transmission method, characterized by being applied to a communication model, the communication model comprising:
an application layer for inputting or outputting communication data;
the capacity expansion layer is used for carrying out data transmission with the application layer based on the capacity expansion primitive under the condition that the length of a data packet in the application layer exceeds the data capacity;
The expansion layer comprises any one of the following:
a newly added protocol stack;
splitting a protocol stack from the application layer;
the capacity expansion primitive includes: a capacity expansion request primitive, a capacity expansion instruction primitive, a capacity expansion response primitive and a capacity expansion verification primitive;
in the case that the capacity expansion layer is a protocol stack split from the application layer, the method includes:
under the condition that the length of a target data packet output by an application layer of a first terminal exceeds the data capacity is determined, a first data packet is obtained, a second expansion request primitive is output to an expansion layer of the first terminal, the first data packet is input to an expansion layer of a second terminal, and the first data packet is a data packet obtained by dividing the target data packet;
and outputting a second expansion indication primitive to an application layer of the second terminal under the condition that the first data packet received by the expansion layer of the second terminal is determined to be the expansion packet.
3. The data transmission method according to claim 2, wherein the communication model further comprises a security layer for securing data transmission;
the method further comprises the steps of:
judging whether a second data packet received by a security layer of the second terminal is a repeated packet or not, wherein the second data packet is a data packet except the first data packet in the target data packet;
And when the second data packet received by the security layer of the second terminal is determined to be a non-repeated packet, outputting a second capacity expansion indication primitive to the application layer of the second terminal further comprises:
and splicing the first data packet and the second data packet.
4. A communication model configuration method, characterized by being applied to a communication model, the communication model comprising:
an application layer for inputting or outputting communication data;
the capacity expansion layer is used for carrying out data transmission with the application layer based on the capacity expansion primitive under the condition that the length of a data packet in the application layer exceeds the data capacity; the capacity expansion layer is arranged between the application layer and the communication layer;
the expansion layer comprises any one of the following:
a newly added protocol stack;
splitting a protocol stack from the application layer;
the capacity expansion primitive includes: a capacity expansion request primitive, a capacity expansion instruction primitive, a capacity expansion response primitive and a capacity expansion verification primitive;
the method comprises the following steps:
newly adding a judging function in the application layer, wherein the judging function is used for judging whether the length of a data packet exceeds the data capacity;
and a check function is newly added in the capacity expansion layer, and the check function is used for checking whether the data packet is a capacity expansion packet or not.
5. A data transmission device, characterized by being applied to a communication model, the communication model comprising:
an application layer for inputting or outputting communication data;
the capacity expansion layer is used for carrying out data transmission with the application layer based on the capacity expansion primitive under the condition that the length of a data packet in the application layer exceeds the data capacity;
the expansion layer comprises any one of the following:
a newly added protocol stack;
splitting a protocol stack from the application layer;
the capacity expansion primitive includes: a capacity expansion request primitive, a capacity expansion instruction primitive, a capacity expansion response primitive and a capacity expansion verification primitive;
in the case that the capacity expansion layer is a newly added protocol stack, the apparatus includes:
the first transmission module is used for obtaining a first data packet under the condition that the length of a target data packet output by an application layer of a first terminal exceeds the data capacity, outputting a first capacity expansion request primitive to a capacity expansion layer of the first terminal, and inputting the first data packet to a capacity expansion layer of a second terminal, wherein the first data packet is a data packet obtained by dividing the target data packet;
the second transmission module is used for outputting a first expansion indication primitive to the application layer of the second terminal under the condition that the first data packet received by the expansion layer of the second terminal is determined to be an expansion packet;
The third transmission module is used for outputting a first capacity expansion response primitive to the capacity expansion layer of the second terminal under the condition that the application layer of the second terminal receives the first capacity expansion indication primitive;
and the fourth transmission module is used for outputting a first expansion verification primitive to the application layer of the first terminal under the condition that the first terminal receives the receipt message of the second terminal.
6. A data transmission device, characterized by being applied to a communication model, the communication model comprising:
an application layer for inputting or outputting communication data;
the capacity expansion layer is used for carrying out data transmission with the application layer based on the capacity expansion primitive under the condition that the length of a data packet in the application layer exceeds the data capacity;
the expansion layer comprises any one of the following:
a newly added protocol stack;
splitting a protocol stack from the application layer;
in the case that the capacity expansion layer is a protocol stack split from the application layer, the apparatus includes:
a fifth transmission module, configured to obtain a first data packet when it is determined that a target data packet length output by an application layer of a first terminal exceeds the data capacity, output a second expansion request primitive to an expansion layer of the first terminal, and input the first data packet to an expansion layer of a second terminal, where the first data packet is a data packet obtained by dividing the target data packet;
And the sixth transmission module is used for outputting a second expansion indication primitive to the application layer of the second terminal under the condition that the first data packet received by the expansion layer of the second terminal is determined to be the expansion packet.
7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the data transmission method according to claim 1, or the data transmission method according to claim 2 or 3, or the communication model configuration method according to claim 4, when executing the program.
8. A non-transitory computer readable storage medium having stored thereon a computer program, characterized in that the computer program, when executed by a processor, implements the data transmission method according to claim 1, or implements the data transmission method according to claim 2 or 3, or implements the communication model configuration method according to claim 4.
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