KR20210098056A - Network application server and operation method thereof - Google Patents

Abstract

The present invention relates to a network application server disposed between a content provider and a user terminal, comprising: a network device equivalent to a physical layer that provides a communication interface with the content provider and the user terminal; a kernel module that ramifies and dualizes a data flow received from the network device based on a pre-registered session management table to provide a data-transmitting flow from a transmitting layer to an application layer and the data-transmitting flow from the transmitting layer to the physical layer; and an application module equivalent to the application layer.

Description

NETWORK APPLICATION SERVER AND OPERATION METHOD THEREOF

The present invention relates to a network application server and an operating method thereof, and more particularly, to a network application server for supporting ultra-low latency data transmission and an operating method thereof.

The ultra-low latency infrastructure technology is created for the purpose of exchanging Internet and multimedia information, transcending the limitations of the general-purpose communication network that has been striving to increase bandwidth, and reduces delay for real-time citizen-sensitive (time-sensitive) communication and industrial process control measurement information exchange. It is a technology to build a communication infrastructure that can minimize and determine latency. As there is a consensus on the need for ultra-low latency technology to support industrial convergence services and 5G communication services, the importance of ultra-low latency network technology in wired infrastructure as well as wireless infrastructure is increasing day by day.

In traditional industries such as real-time video, interactive communication, and games through various devices such as smartphones and smart TVs, as well as in new industries such as autonomous driving and smart factories, the demand for networks is reaching the level of ultra-low latency beyond low latency. When an ultra-low latency network is provided, immediate processing of the content transmitted by the other party and the resulting data can be fed back to the other party. In general, in real-time video, interactive communication, and games, a bidirectional delay time of about 100 ms or less between a content provider and a user terminal is allowed. Beyond this, in industries that require precise work, such as autonomous driving and smart factories, bi-directional latency of less than tens of ms is allowed.

1 is a diagram showing the configuration of a general network service providing system. As shown in FIG. 1 , the network service providing system 10 includes a content provider 11 , a first communication network 12 , a network application server 13 , and a second communication network 14 . ) and a user terminal (or client terminal, 15). Here, the network application server 13 includes a network device corresponding to a physical layer, a kernel module corresponding to a transport layer, and an application module corresponding to an application layer. include

The content provider 11 transmits data to the network application server 12 via the first communication network. The network application server 13 receives data from the content provider 11 through the physical layer, and relays (transfers) the received data to the transport layer and the application layer, which are upper layers.

The application layer of the network application server 13 performs a series of operations (eg, Decryption, Decoding, Encoding, Encryption), data storage, and data processing according to the purpose of the corresponding network service. and data analysis, etc.) are performed sequentially. When there is a user terminal 15 requesting data transmission to the network application server 13 , the application layer of the server 13 sequentially performs a series of operations on the data provided from the content provider 11 . and then transmits the corresponding data to the user terminal 15 .

However, the conventional network service providing system 10 goes through complex processes for data processing and data relay in the application layer of the network application server 13 between the content provider 11 and the user terminal 15 (that is, the end There is a problem in that it is difficult to implement the ultra-low latency technology as the data delay time increases. That is, due to a series of operations performed in the application layer of the network application server 13, a significant delay time inevitably occurs for the data of the content provider 11 to be displayed on the user terminal 15, and there is a delay in one processing. When this occurs, there is a problem in that the quality of communication experience of the terminal user is rapidly reduced by increasing the delay time.

SUMMARY OF THE INVENTION The present invention aims to solve the above and other problems. Another object of the present invention is to provide a network application server capable of minimizing end-to-end data transmission delay due to data processing delay of the application layer, and an operating method thereof.

Another object of the present invention is to provide a network application server capable of providing a flow for transmitting data from a transport layer to an application layer and a flow for transmitting data from a transport layer to a physical layer by bifurcated data flow and an operating method thereof.

According to an aspect of the present invention to achieve the above or other objects, a network device corresponding to a physical layer that provides a communication interface with a content provider and a user terminal; Providing a flow for transmitting data from the transport layer to the application layer by branching and binarizing the data flow received from the network device based on a previously registered session management table, and a flow for transmitting data from the transport layer to the physical layer kernel module; and an application module corresponding to the application layer.

According to another aspect of the present invention, there is provided a method comprising: receiving data from a specific content provider through a physical layer; determining whether to dualize data processing by branching the data flow received from the physical layer based on the session management table stored in the memory in the transport layer; and when branching the data flow, transmitting the received data from the transport layer to the physical layer, and transmitting the same data as the received data from the transport layer to the application layer. It provides a method of operation.

According to another aspect of the present invention, the process of receiving data from a specific content provider through a physical layer; determining whether to dualize data processing by branching the data flow received from the physical layer based on the session management table stored in the memory in the transport layer; and when branching the data flow, transmitting the received data from the transport layer to the physical layer, and transmitting the same data as the received data from the transport layer to the application layer. A computer program stored in a possible recording medium is provided.

Effects of a network application server and an operating method thereof according to embodiments of the present invention will be described as follows.

According to at least one of the embodiments of the present invention, the data processing operation is dualized by branching the data flow for a user session registered in advance in the transport layer, not the application layer, thereby eliminating the time delay occurring while passing through the application layer. This has the advantage of being able to provide communication quality similar to that of general network equipment by minimizing the end-to-end data transmission delay.

In addition, according to at least one of the embodiments of the present invention, by minimizing the end-to-end data transmission delay through the data processing dual structure in the transport layer, traffic/transportation, distance education/meeting/performance , medical, game/sports, agriculture/industrial, etc. can provide real-time communication services as well as various additional services through data processing/analysis/storage at the application layer. there is.

However, the effects that can be achieved by the network application server and the method of operation thereof according to the embodiments of the present invention are not limited to those mentioned above, and other effects not mentioned are from the following description in the technical field to which the present invention belongs It will be clearly understood by those of ordinary skill in the art.

1 is a diagram showing the configuration of a general network service providing system;
2 is a diagram referenced to explain the operation of a general network service providing system;
3 is a diagram referenced to explain the operation of a network service providing system according to an embodiment of the present invention;
4 is a diagram illustrating a configuration of a network application server according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating the structure of a session management table managed by the kernel module of FIG. 4;
FIG. 6 is a diagram referenced to explain an operation of distributing data received from a content provider in the kernel module of FIG. 4 ;
FIG. 7 is a diagram referenced to explain an operation of deleting a user session registered in a session management table in the kernel module of FIG. 4 ;
FIG. 8 is a diagram referenced to explain an operation of changing a priority of a user session registered in a session management table in the kernel module of FIG. 4 ;
9 is a flowchart illustrating an operation of a transport layer that manages a session management table in response to a request from an application layer;
10 is a flowchart illustrating an operation of a transport layer for dualizing data flows with reference to a session management table.

Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numerals regardless of reference numerals, and overlapping descriptions thereof will be omitted. The suffixes "module" and "part" for the components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have a meaning or role distinct from each other by themselves. That is, the term 'unit' used in the present invention means a hardware component such as software, FPGA, or ASIC, and 'unit' performs certain roles. However, 'part' is not limited to software or hardware. The 'unit' may be configured to reside on an addressable storage medium or may be configured to refresh one or more processors. Thus, as an example, 'part' refers to components such as software components, object-oriented software components, class components and task components, processes, functions, properties, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays and variables. Functions provided within components and 'units' may be combined into a smaller number of components and 'units' or further divided into additional components and 'units'.

In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed herein is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention , should be understood to include equivalents or substitutes.

The present invention proposes a network application server capable of minimizing end-to-end data transmission delay due to data processing delay in the application layer, and an operating method thereof. In addition, the present invention proposes a network application server capable of providing a flow for transmitting data from a transport layer to an application layer and a flow for transmitting data from a transport layer to a physical layer by bifurcated data flow and an operating method thereof. Meanwhile, the present invention is applicable to a network-based service comprising a content provider, a network application server, and a user terminal, and is not applied to a peer-to-peer (P2P) service that directly exchanges data between user terminals.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the drawings.

2 is a diagram referenced to explain the operation of a general network service providing system.

Referring to FIG. 2 , a typical network service providing system 20 includes a content provider 21 , a first communication network 22 , a network application server 23 , a second communication network 24 , and a user terminal 25 . include Hereinafter, in the present specification, for convenience of description, the network service providing system 20 for providing a video streaming service will be exemplified and described.

The content provider 21 receives raw image data from a camera and converts analog image data into digital image data through a capture module. Then, the content provider 21 compresses the digital image data with a predetermined codec through an encoder, and transmits the compressed data through packetization. Then, the content provider 21 encrypts the transmission standardized data, and transmits the encrypted data to the network application server 23 through the first communication network 22 .

The network application server 23 includes a network device (not shown) corresponding to a physical layer, a kernel corresponding to a transport layer, and an application corresponding to an application layer.

The physical layer of the network application server 23 receives data from the content provider 21 via the first communication network 22 . The transport layer of the network application server 23 transfers data received from the physical layer to the application layer.

The application layer of the network application server 23 decrypts data received from the transport layer and de-packetizes the packetized data for transmission. Then, the application layer decodes data compressed with a specific codec through decoding and converts it into digital image data. Then, the application layer processes, analyzes, and stores data according to the purpose of the corresponding network service.

When the user terminal 25 requests data transmission, the application layer of the network application server 23 determines this and performs a series of operations similar to the transmission process of the content provider 21, ie, encoding, packetizing, and encryption operations. do. The transport layer of the network application server 23 transfers data received from the application layer to the physical layer. The physical layer of the network application server 23 transmits the data received from the transport layer to the user terminal 25 through the second communication network 24 .

The user terminal 25 receives data from the network application server 23 via the second communication network 24 . In addition, the user terminal 25 performs a series of operations similar to the reception process of the network application server 23 , that is, decryption, depacketization, and decoding operations. Next, the user terminal 25 renders the decompressed data and displays it on the display unit.

As such, in the general network service providing system 20 , in order to transmit data between the content provider 21 and the user terminal 25 , the application layer of the network application server 23 must pass. However, due to a series of data processing operations performed in the application layer of the network application server 23, a large delay in displaying the data of the content provider 21 on the user terminal 25 inevitably occurs, and in one processing process When a delay occurs, a longer delay time may be increased, and thus the communication experience quality of the terminal user may be rapidly deteriorated. Therefore, in order to solve this problem, it is necessary to bifurcate the data processing operation by branching the data flow in the transport layer of the network application server 23 .

3 is a diagram referenced to explain the operation of a network service providing system according to an embodiment of the present invention.

Referring to FIG. 3 , the network service providing system 100 according to an embodiment of the present invention includes a content provider 110 , a first communication network 120 , a network application server 130 , and a second communication network 140 . and a user terminal 150 .

Since the operations of the content provider 110 and the user terminal 150 are the same as those of the content provider 21 and the user terminal 25 of FIG. 2 described above, a detailed description thereof will be omitted.

The network application server 130 includes a network device (not shown) corresponding to a physical layer, a kernel 135 (Kernel) corresponding to a transport layer, and an application corresponding to an application layer. The type of the network application server 130 may include a streaming server, an encoding server, or a messaging server, but is not necessarily limited thereto.

The physical layer of the network application server 130 is a layer that defines an interface between a terminal device and a transmission medium and provides a physical means for bit transmission between data link layer entities. This physical layer serves to provide a physical communication interface with the content provider 110 and the user terminal 150 .

The physical layer may receive data from the content provider 110 through the first communication network 120 and transmit the received data to a transport layer, which is an upper layer. In addition, the physical layer may receive data from the transport layer and transmit the received data to the user terminal 150 through the second communication network 140 .

The transport layer of the network application server 130 provides communication services that connect senders and receivers within a hierarchical network component and protocol, and provides convenient services such as connection-oriented data stream support, reliability, flow control, and multiplexing. layer that provides

The transport layer may perform a function of receiving data from a physical layer, which is a lower layer, and providing two data flows by copying the received data. That is, the transport layer branches the data received from the content provider 110 through the physical layer and relays the data to the user terminal 150, and the second data flow transfers the data to the upper layer, the application layer. Data flow can be provided. This data processing dualization operation of the transport layer is applicable to user sessions registered in advance through the application layer.

The operation of the transport layer may be implemented by a kernel. The kernel may be a Linux kernel provided under a Linux operating system, but is not limited thereto. The kernel includes a control unit, a memory, and a transmission unit, and detailed description of the operation of the corresponding components will be described later.

The application layer of the network application server 130 is an abstraction layer reserved for communication protocols and schemes designed for inter-process communication connections through Internet Protocol computer networks in computer network programming. The application layer decrypts data received from the transport layer and de-packetizes the packetized data for transmission. Then, the application layer decodes data compressed with a specific codec through decoding and converts it into digital data. Then, the application layer processes, analyzes, and stores data according to the purpose of the corresponding network service.

The application layer may request registration of information about a user session requiring ultra-low latency data transmission to the transport layer by using a system call. Also, the application layer may request the transport layer to delete and change the priority of the user session previously registered in the memory by using a system call.

4 is a diagram illustrating a configuration of a network application server according to an embodiment of the present invention.

Referring to FIG. 4 , the network application server 200 according to an embodiment of the present invention includes a network device 210 corresponding to a physical layer, a kernel module 220 corresponding to a transport layer, and an application module corresponding to an application layer. (230).

The network device 210 corresponding to the physical layer of the network application server 200 transmits data received from the content provider 110 to the kernel module 220 which is an upper layer, and the data received from the kernel module 220 . to the user terminal 150 .

The kernel module 220 corresponding to the transport layer of the network application server 200 receives data from the network device 210, which is a lower layer, and copies the received data to form two data flows. can perform functions that provide To this end, the kernel module 220 may include a receiver 221 , a transmitter 222 , a memory (or database, 223 ), and a controller 224 . The components shown in FIG. 4 are not essential for implementing the kernel module 220 , so the kernel module described in this specification may have more or fewer components than those listed above.

The receiver 221 may receive data from the content provider 110 through the physical layer 210 which is a lower layer. Then, the receiving unit 221 branches the data received from the physical layer 210 according to the control command of the control unit 224 and transfers the data to the application layer 230 and the transmission unit 222 and transmits the data to the application layer. An operation of forwarding only to 230 may be selectively performed. In this case, the former operation may be performed for a user terminal requiring ultra-low delay data transmission, and the latter operation may be performed for a user terminal requiring general data transmission.

The transmitter 222 may perform an operation of transmitting data received from the application layer 230, which is an upper layer, to the physical layer 210, which is a lower layer, according to a control command of the controller 224 .

In addition, the transmitter 222 may perform an operation of transmitting the data transmitted from the receiver 221 to the lower physical layer 210 according to a control command of the controller 224 . In this case, the receiving unit 221 and the transmitting unit 222 have a data transmission structure of 1:N. That is, when the receiving unit 221 transmits one packet of data to the transmitting unit 222 , the transmitting unit 222 transmits one packet of data transmitted from the receiving unit 221 to the N user terminals 221 .

Meanwhile, in the present embodiment, the receiver 221 and the transmitter 222 are exemplified independently implemented inside the kernel module 220, but the present invention is not limited thereto. Instead of the receiver and the transmitter, one communication unit is a kernel module. It will be apparent to those skilled in the art that 220 may be implemented therein.

The memory 223 stores data supporting various functions of the kernel module 220 . The memory 223 may store a program (or software) driven in the kernel module 220 , data for an operation of the kernel module 220 , and instructions.

The memory 223 may store a session management table for maintaining and managing information on user sessions requiring ultra-low latency data transmission. In this case, the session management table includes session connection information and session priority information, and may be managed in units of sessions. The session connection information includes IP address and port information of a content provider, IP address and port information of a user terminal, identification (name) information of a user session corresponding to each user terminal, and a link between the content provider and the user terminal and the user session. ) information, etc.

For example, as shown in FIG. 5 , in the session management table, first to fifth user sessions and application applications (special users) requesting data transmission from the first content provider, and a sixth requesting data transmission from the second content provider and a seventh user session and application (special user) may be registered. Here, the application indicates an application layer of the network application server 200 .

The registration information stored in the session management table includes the IP address (Src_IP) and port (Src_Port) information of the content provider on a per session basis, and the IP address (Dst_IP) and port (Dst_Port) information of the user terminal that has requested data transmission from the content provider, It includes session priority information and session name information.

The session management table is basically sorted according to the IP address and port information of the content provider. Since an application classified as a special user among information about user terminals cannot have the IP address and port information of the user terminal, it has a special IP address value (eg, 255.255.255.255) and a port value (eg, Port 0). .

The priority value of each user session has any one of 1 to 65535, and the lower the value, the higher the priority. The priority of each user session can be changed according to the request of the application layer. In addition, the priority of each user session can be changed according to the importance of data processing.

The priority of each user session is valid only within the same content provider, and there is no priority between content providers. For example, since the first user session of the first content provider does not have a higher priority than the sixth user session of the second content provider, it has the lowest priority among several user sessions receiving data from the first content provider. This means that it will be sent the fastest.

The memory 223 is a flash memory type, a hard disk type, a solid state disk type, a silicon disk drive type SDD, and a multimedia card micro type. ), card-type memory (such as SD or XD memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read (EEPROM) -only memory), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, and an optical disk may include at least one type of storage medium.

The controller 224 controls the overall operation of the kernel module 220 by driving a program or software stored in the memory 223 . To this end, the controller 224 may control the operations of the receiver 221 and the transmitter 222 constituting the kernel module 220 .

When receiving data (or packets), the controller 224 may refer to the session management table stored in the memory 223 and distribute the data according to a predetermined priority for each user session. In this case, the control unit 224 branches the data flow received from the physical layer 210 to support ultra-low-latency data transmission for user sessions previously registered in the session management table, and transfers data from the transport layer to the application layer. A first data flow for transmitting data and a second data flow for transmitting data from the transport layer to the physical layer may be provided. Also, the controller 224 may copy the received data to transmit the received data to a plurality of user terminals.

For example, as shown in FIG. 6 , the controller 224 refers to the session management table stored in the memory 223 and distributes packets stored in the buffer of the receiver 221 to pre-registered user sessions according to priority. can For example, assuming that the first to fifth user terminals requesting data transmission from a specific content provider and the application layer of the network application server 200 are registered in the session management table, the packet n is received from the corresponding content provider. In response, the control unit 224 distributes and transmits the packet n in the order of the first user terminal, the second user terminal, the third user terminal, the application layer, the fourth user terminal, and the fifth user terminal according to a predetermined priority.

On the other hand, when a user terminal not registered in the session management table requests data transmission, the control unit 224 transmits a packet to the application layer 230 as in the conventional transmission process, and the application layer processes and processes data. After performing a series of operations such as , analysis and storage, the operation of distributing the corresponding packet to the user terminal is performed.

The controller 224 may maintain and manage the session management table stored in the memory 223 according to a request command from the application layer 230 . For example, the controller 221 registers information on a user session requiring ultra-low delay data transmission in the session management table according to a request command of the application layer 230, or a user session previously registered in the session management table. An operation of deleting information or changing (adjusting) priorities of user sessions previously registered in the session management table may be performed.

For example, as shown in FIG. 7 , when the data transmission request of the fourth user terminal is terminated or ultra-low delay transmission through the transport layer is no longer required, the application layer 230 uses a system call. Accordingly, it is possible to request the kernel module 220 to delete the user session #4 corresponding to the fourth user terminal. In response to the request of the application layer 230 , the controller 224 of the kernel module 220 may delete information about user session #4 stored in the session management table.

In addition, as shown in FIG. 8 , when it is necessary to change (up/down) the priority of user session #4 corresponding to the fourth user terminal, the application layer 230 uses a system call. Thus, it is possible to inquire priority information of user sessions, and to request a change of priority for user session #4 from the kernel module 220 with reference to the inquired priority information. In response to the request of the application layer 230 , the controller 224 of the kernel module 220 may change the priority information of the user session #4 stored in the session management table.

The application module 230 corresponding to the application layer of the network application server 200 performs a series of operations for processing, processing, analyzing, and storing data received from the transport layer 220, which is a lower layer. Also, the application module 230 transmits data to be transmitted to the user terminal 150 to the lower layer, the transport layer 220 .

The application module 230 may inquire the session management table stored in the memory 223 of the kernel module 220 by using a system call. In this case, the application module 230 may inquire the session management table in units of content providers or sessions.

For example, the application module 230 may inquire user information and session priority information through a combination of content provider IP address (Src_IP) and port (Src_Port) information. When the content provider is searched for, a list of user sessions related to each content provider is displayed. Meanwhile, the application module 230 may inquire the session name in units of sessions by using the session name as a main identifier (Main Key ID). In the case of searching for the session unit, content provider information (Src_IP, Src_Port) and user terminal information (Dst_IP, Dst_Port) corresponding to each session name are displayed.

The application module 230 may request registration of information about a user session requiring ultra-low delay data transmission to the transport layer 220 using a system call. For example, when receiving a data transmission request from the user terminal 150 , the application module 230 may inquire session management table information stored in the memory 223 of the kernel module 220 using a system call. As a result of the inquiry, if the corresponding user terminal 150 is not registered in the session management table, the application module 230 transmits the session connection information and session priority information related to the user terminal 150 to the kernel using a system call. A registration request may be made to the module 220 .

Also, the application module 230 may request the transport layer 220 to delete a user session requiring ultra-low-latency data transmission and to change a priority using a system call.

As described above, the network application server according to the present invention bifurcates the data processing operation by branching the data flow for the user session registered in advance in the transport layer, not the application layer, so that the existing It is possible to remove the time delay, and accordingly, the data transmission delay between the content provider 110 and the user terminal 150 (that is, end-to-end) is minimized and similar to that of general network equipment. It can provide communication quality. The ultra-low delay service provision method using the data dual processing structure of the transport layer can be used in various industrial fields such as real-time video, interactive communication, games, autonomous driving, and smart factories.

9 is a flowchart illustrating an operation of a transport layer that manages a session management table in response to a request from an application layer.

9, when the application layer 230 of the network application server 200 according to the present invention receives a data transmission request from the user terminal (S905), whether the user terminal is a terminal requiring ultra-low delay data transmission is checked (S910).

As a result of the check in step 910, when the corresponding user terminal is a terminal requiring ultra-low latency data transmission, the application layer 230 may inquire registration information of the session management table stored in the transport layer 220 using a system call. (S915).

The application layer 230 may check whether the user terminal is a user session registered in the session management table (S920). As a result of the check, if the user terminal is not registered in the session management table, the application layer 230 may request the transport layer 220 to register the user session of the user terminal using a system call (S925). In response to the request command of the application layer 230, the transport layer 220 may register user session information of the corresponding user terminal in the session management table (S930). At this time, information registered in the session management table includes IP address (Src_IP) and port (Src_Port) information of the content provider, IP address (Dst_IP) and port (Dst_Port) information of the corresponding user terminal, session priority information, and session name information, etc.

On the other hand, when the priority change event of the user terminal occurs (S935), the application layer 230 may inquire the session priority information of the session management table stored in the transport layer 220 using a system call (S940) ).

The application layer 230 may check priority information of user terminals registered in the session management table (S945). The application layer 230 may request the transport layer 220 to change the priority of the corresponding user terminal based on priority information registered in the session management table (S950). In response to the request command of the application layer 230, the transport layer 220 may change (adjust) the priority of the user terminal registered in the session management table (S955).

Thereafter, when the data transmission request is terminated from the user terminal (S960), the application layer 230 may request the transport layer 220 to delete the user session of the corresponding user terminal (S965). In response to the request command of the application layer 230, the transport layer 220 may delete user session information of the user terminal registered in the session management table (S970).

10 is a flowchart illustrating an operation of a transport layer for dualizing data flows with reference to a session management table.

Referring to FIG. 10 , the transport layer 220 of the network application server 200 according to the present invention may check whether a packet is received from a specific content provider through the physical layer 210, which is a lower layer (S1010).

As a result of checking in step 1010 , when a packet is received from a specific content provider, the transport layer 220 may check session connection information and session priority information of a session management table stored in the memory ( S1020 ). That is, the transport layer 220 may search the session management table to check the user session information and priority information requesting data transmission from a specific content provider.

The transport layer 220 may check whether user sessions requesting data transmission from a specific content provider are user terminals ( S1030 ). As a result of checking in step 1030 , if the registered user session is a user terminal, the transport layer 220 may copy the packet received from the physical layer 210 ( S1040 ). This is to dualize data processing by branching the data flow in the transport layer 220 .

The transport layer 220 may sequentially distribute the received packet to user terminals according to the priority of the user session, and then transmit the corresponding packet to the physical layer 210 (S1050). Together with this data (packet) flow, the transport layer 220 may transmit a packet received from the physical layer 210 to the application layer 230 (S1060). In this way, the transport layer 220 divides the data flow for user sessions registered in the session management table and dualizes the data processing operation, thereby effectively reducing the time delay that occurs during the existing end-to-end data transmission through the application layer. can be removed

On the other hand, as a result of the check in step 1030, if the registered user session is not a user terminal (that is, if the registered user session is an application layer that is a special user), the transport layer 220 does not need to branch the data flow to the physical layer ( The packet received from the 210 may be transmitted to the application layer 230 (S1070).

The present invention described above can be implemented as computer-readable code on a medium in which a program is recorded. The computer-readable medium may continuously store a computer-executable program, or may be temporarily stored for execution or download. In addition, the medium may be various recording means or storage means in the form of a single or several hardware combined, it is not limited to a medium directly connected to any computer system, and may exist distributed on a network. Examples of the medium include a hard disk, a magnetic medium such as a floppy disk and a magnetic tape, an optical recording medium such as CD-ROM and DVD, a magneto-optical medium such as a floppy disk, and those configured to store program instructions, including ROM, RAM, flash memory, and the like. In addition, examples of other media may include recording media or storage media managed by an app store that distributes applications, sites that supply or distribute various other software, and servers. Accordingly, the above detailed description should not be construed as restrictive in all respects but as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

200: network application server 210: network device
220: kernel module 221: receiver
222: transmitter 223: memory
224: control unit 230: application module

Claims (11)

a network device corresponding to a physical layer providing a communication interface with a content provider and a user terminal;
Providing a flow for transmitting data from the transport layer to the application layer by branching and binarizing the data flow received from the network device based on a previously registered session management table, and a flow for transmitting data from the transport layer to the physical layer kernel module; and
Including an application module corresponding to the application layer,
The session management table comprises at least one of address information of a content provider, address information of a user terminal requiring ultra-low delay data transmission, user session identification information corresponding to each user terminal, and priority information of each user terminal network application server. According to claim 1,
The kernel module comprises a receiver for receiving data from the content provider, a transmitter for transmitting data to the user terminal, a memory for storing the session management table, and a controller for controlling operations of the receiver and transmitter Network application server. 3. The method of claim 2,
The control unit accesses the session management table stored in the memory according to a request command from the application module, and performs at least one of a session registration function, a session deletion function, and a priority change function. 3. The method of claim 2,
The control unit, when receiving data from a specific content provider, searches the session management table to check the user session information and priority information requesting data transmission from the specific content provider. 5. The method of claim 4,
The control unit, when the user session requesting the data transmission is a user terminal, the network application server, characterized in that by duplicating the data received from the network device to branch the data flow. 6. The method of claim 5,
The control unit distributes the received data to the user terminals according to the priority information and then transmits the data to the physical layer. 5. The method of claim 4,
The control unit transmits the data received from the network device only to the application module when the user session requesting the data transmission is not the user terminal. According to claim 1,
The network application server, characterized in that the application module inquires the session management table stored in the kernel module using a system call (system call). 9. The method of claim 8,
The application module, when a predetermined event occurs, the network application server, characterized in that the request to the kernel module to change the user session information in the session management table. receiving data from a specific content provider through a physical layer;
determining whether to dualize data processing by branching the data flow received from the physical layer based on the session management table stored in the memory in the transport layer; and
When branching the data flow, transmitting the received data from the transport layer to the physical layer, and transmitting the same data as the received data from the transport layer to the application layer,
The session management table comprises at least one of address information of a content provider, address information of a user terminal requiring ultra-low delay data transmission, user session identification information corresponding to each user terminal, and priority information of each user terminal How a network application server works. A computer program stored in a computer-readable recording medium so that the method according to claim 10 is executed on a computer.

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