KR20150032127A - Apparatus for software defined network and method for control thereof - Google Patents

Apparatus for software defined network and method for control thereof Download PDF

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Publication number
KR20150032127A
KR20150032127A KR20130112190A KR20130112190A KR20150032127A KR 20150032127 A KR20150032127 A KR 20150032127A KR 20130112190 A KR20130112190 A KR 20130112190A KR 20130112190 A KR20130112190 A KR 20130112190A KR 20150032127 A KR20150032127 A KR 20150032127A
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KR
South Korea
Prior art keywords
traffic
data
communication method
management
control
Prior art date
Application number
KR20130112190A
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Korean (ko)
Inventor
정상수
Original Assignee
주식회사 케이티
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Priority to KR20130112190A priority Critical patent/KR20150032127A/en
Publication of KR20150032127A publication Critical patent/KR20150032127A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/542—Systems for transmission via power distribution lines the information being in digital form
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2441—Traffic characterised by specific attributes, e.g. priority or QoS relying on flow classification, e.g. using integrated services [IntServ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2483—Traffic characterised by specific attributes, e.g. priority or QoS involving identification of individual flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/29—Flow control; Congestion control using a combination of thresholds

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Small-Scale Networks (AREA)

Abstract

After the software defined network device detects the traffic to be transmitted, it verifies the traffic characteristic information of the detected traffic as control traffic, management traffic, or data traffic. And controls traffic to be transmitted through either the first communication method or the second communication method based on the checked traffic characteristic information.

Description

[0001] DESCRIPTION [0002] Software-defined network devices and control methods using them [0002]

The present invention relates to a software defined network device and a control method using the same.

Virtualization technology is a technology that abstracts the physical characteristics of computing resources and objects (for example, users, systems, applications, etc.) and efficiently controls the interaction between them. Software Defined Network (SDN), a network virtualization technology, divides a network into a data plane, a management plane, and a control plane. In this way, various virtual networks are created on one physical network, so that each virtual network performs a specific purpose function.

On the other hand, a power line communication method refers to a communication method in which data is transmitted simultaneously with power supply using a power supply AC or DC power supply line, without a separate communication line configuration.

Typically, a software defined network accepts data plane, management plane, and control plane traffic through a common network cable. At this time, because the data plane, the management plane, and the control plane are divided into network resources, which is a limited resource, the bandwidth for data traffic that can be provided to users is substantially reduced.

In addition, a collision may occur between the network control / management traffic and the data transmission traffic, and an attack on the data transmission traffic through the network control / management cable may occur. In addition, since network cables are used extensively, there is a disadvantage in that efficiency is lowered in terms of network operation / data center management.

Therefore, the present invention provides a software defined network device using a software defined network built in a building, a communication method using a power line communication and a LAN cable, and a control method using the software defined network device.

According to another aspect of the present invention, there is provided a software defined network device,

An interworking unit for detecting whether or not traffic is generated and determining characteristics of the generated traffic; A control unit for determining whether to transmit the generated traffic through a first communication method or a second communication method based on characteristics of traffic determined by the interlocking unit; A power line communication module interlocked with the control unit and receiving traffic to be transmitted through the first communication method from the control unit; A first port coupled to the power line communication module and transmitting the traffic to be transmitted through the first communication method; And a second port coupled to the control unit and transmitting the traffic to be transmitted through the second communication method.

Wherein the control unit comprises: a data plane for processing data traffic among the traffic received from the interlocking unit; A management plane for processing management traffic among the traffic received from the linking unit and determining whether to transmit the management traffic through one of the first communication method and the second communication method based on data transmitted from the outside, ; A control plane for processing control traffic among the traffic received from the linkage unit; And a data transmitting and receiving unit for receiving the data transmitted from the outside and for providing the received data to the data plane, the management plane and the control plane.

Wherein the data plane includes: an interlocking unit that transmits and receives data received from the outside to the management plane; And a LAN connection coupled to the second port to transmit the data traffic through the second port.

Wherein the management plane includes: an interlocking unit that transmits and receives data received from the outside to the management plane and the control plane; A LAN connection unit connected to the second port to transmit the management traffic through the second port; And a powerline communication connection coupled to the powerline communication module to transmit the management traffic over the first port.

Wherein the control plane includes: an interlocking unit that transmits and receives data received from the outside to the management plane; And a powerline communication connection coupled to the powerline communication module to transmit the control traffic over the first port.

According to another aspect of the present invention, there is provided a method for controlling traffic transmission of a software defined network device,

Detecting traffic to be transmitted; Checking traffic characteristic information indicating whether the detected traffic is control traffic, management traffic, or data traffic; And controlling the traffic to be transmitted through one of a first communication method and a second communication method based on the checked traffic characteristic information.

Transmitting the traffic through a power line communication scheme that is the first communication scheme if the determined traffic characteristic information is control traffic; If the determined traffic characteristic information is data traffic, transmitting through the network communication method as the second communication method; And if the determined traffic characteristic information is management traffic, transmitting the selected traffic characteristic information through one of the first communication method and the second communication method.

The step of transmitting in any one of the above methods may include: checking whether the current amount of data traffic is higher than a predetermined threshold based on information received from outside; Transmitting the management traffic through the first communication method if the current amount of data traffic is higher than a predetermined threshold; And allowing the management traffic to be transmitted through the second communication method if the current amount of data traffic is lower than a predetermined threshold.

According to the present invention, since power line communication is used to transmit control traffic in a software defined network and communication is performed using a LAN cable for data transmission, the bandwidth of network data traffic can be maximized, general network cable wiring can be minimized, The efficiency can be improved.

In addition, since the allocated bandwidth for the control traffic in the software defined network using the existing network cable can be allocated to the data traffic bandwidth, it is possible to provide more improved service to the user.

It also minimizes the wiring of network cables, reduces the possibility of errors due to human errors, and makes rack layout more flexible

1 is a structural diagram of a software defined network apparatus according to an embodiment of the present invention.
2 is a structural diagram of a switch / network control unit according to an embodiment of the present invention.
3 is a flowchart of a method for controlling traffic transmission according to an embodiment of the present invention.
4 is an exemplary diagram illustrating an improvement in data traffic bandwidth performance in accordance with an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

Hereinafter, a software defined network device according to an embodiment of the present invention and a control method using the same will be described with reference to the drawings.

1 is a structural diagram of a software defined network apparatus according to an embodiment of the present invention.

1, the software defined network device 100 includes a control unit 110, an interlocking unit 120, a power line communication module 130, a first port 140 and a second port 150 .

The control unit 110 controls network traffic and network traffic, and transmits data transmitted from the outside to the interworking unit 120. Upon reception of the characteristic information of the corresponding traffic together with the traffic from the interworking unit 120, the received traffic is transmitted to either the power line communication module 130 or the second port 150 to transmit the traffic. This will be described in detail first with reference to FIG.

2 is a structural diagram of a control unit according to an embodiment of the present invention.

2, the control unit 110 includes a data transmission / reception unit 111, a data plane 112, a management plane 113, and a control plane 114. [ The data plane 112 includes an interlocking portion 112-1 and a LAN connection portion 112-2. The management plane 113 includes a LAN connection portion 113-1, an interlocking portion 113-2, And a connection 113-3. In addition, the control plane 114 includes an interlocking portion 114-1 and a power line communication connection portion 114-2.

The data transmitting and receiving unit 111 receives information that can be shared or referenced by the plane from the database in cooperation with a database (not shown) outside the software defined network device 100, . Here, the information transmitted to each plane or the interlocking unit 120 includes information on the amount of traffic currently being transmitted and received, resource information being used, and the like, and is not limited to any information.

The data plane 112 processes data traffic and the interlocking unit 112-1 included in the data plane 112 shares or receives the data received from the data transmission and reception unit 111 with the management plane 113 To send and receive information. Since the data traffic is transmitted through the network cable in the embodiment of the present invention, the LAN connection 112-2 is directly connected to the second port 150 to transmit the data traffic through the second port 150 do.

The management plane 113 processes the management traffic and the linking unit 113-1 included in the management plane 113 transmits the data received from the data transmitting and receiving unit 111 to the data plane 112 and the control plane 114 ) And send and receive information so that they can be referenced. In the embodiment of the present invention, management traffic is transmitted through either a network cable or a power line communication depending on a situation. Therefore, the LAN connection unit 113-2 is directly connected to the second port 150, and the power line communication connection unit 113-3 is directly connected to the power line communication module 130, ) Or through the first port (140).

The control plane 114 processes the control traffic and the interlocking unit 114-1 included in the control plane 114 can share or receive data received from the data transmission and reception unit 111 with the management plane 113 To send and receive information. Since the control traffic is transmitted through the power line communication method in the embodiment of the present invention, the power line communication connection part 114-2 is directly connected to the power line communication module 130 to transmit the control traffic to the power line communication module 130 Through the first port (140).

The interlocking part 112-1 included in the data plane 112, the interlocking part 113-1 included in the management plane 113, and the interlocking part 114-1 included in the control plane 114, Share information between planes so that they can be shared or referenced. This is because, although data plane, management plane and control plane are physically connected to each other, there is no mutual information sharing or reference function in the related art, whereas in the embodiment of the present invention, interlocking parts 112-1, 113-1 and 114-1 ) To share and reference each other's data.

In a case where mutual data is shared or referenced through the interlocking units 112-1, 113-1, and 114-1, when the bandwidth allocated for management traffic is idle in a situation where bandwidth for data traffic is insufficient, The bandwidth for the data traffic can be redistributed to the bandwidth for the data traffic. In addition, bandwidth for data traffic can be redistributed to bandwidth for management traffic when the bandwidth for management traffic is insufficient and the bandwidth for data traffic is sufficient (for example, short flow TCP, game traffic, etc.). At this time, the bandwidth for management traffic is available through both the network cable and the power line.

Meanwhile, the interlocking unit 120 of FIG. 1 interlocks with the controller 110 to detect whether or not traffic is generated, and determines a traffic characteristic for checking whether the generated traffic is a data traffic management traffic or a control traffic. At this time, the traffic is received and generated through the first port 140 or the second port 150, and the traffic characteristics are stored in the transmitted traffic signal and the characteristic information is transmitted, A detailed description of the method will be omitted.

When it is confirmed that the generated traffic is the management traffic by checking the traffic characteristics, the interworking unit 120 transmits the management traffic to the second port 150 or the power line communication module 130 based on the data received from the controller 110 Decide where to send it.

The power line communication module 130 interlocks with the control unit 110 and the first port 140 and transmits control traffic or management traffic received from the control unit 110 to the first port 140 for transmission through power line communication do.

The first port 140 transmits control traffic or management traffic received from the power line communication module 130 through power line communication.

The second port 150 is interlocked with the control unit 110 and transmits data traffic or management traffic received from the control unit 110 through general network communication.

A method of controlling traffic transmission through the software defined network device 100 described above will be described with reference to FIG.

3 is a flowchart of a method for controlling traffic transmission according to an embodiment of the present invention.

3, the interlocking unit 120 receives traffic from the outside and detects that the corresponding traffic should be transmitted to the outside (S100). After that, the interlocking unit 120 determines whether the traffic to be transmitted is a control traffic (S110). Confirmation of whether or not the detected traffic is control traffic can be performed through various methods, and a detailed description thereof will be omitted in the embodiment of the present invention.

If the detected traffic is a control traffic, the linking unit 120 delivers the corresponding traffic to the controller 110, and also transmits information indicating that the traffic characteristic is control traffic. Then, the control unit 110 transmits the control traffic to the power line communication module 130 to transmit the control traffic. In the embodiment of the present invention, since the control traffic is transmitted to the outside through the power line communication method, the controller 110 transmits the received information to the power line communication module 130 connected to the control line.

If it is determined in step S110 that the traffic detected by the interworking unit 120 is not a control traffic, the interworking unit 120 determines whether the corresponding traffic is a management traffic in step S130. If it is not the management traffic, it is confirmed that the corresponding traffic is data traffic, and the interworking unit 120 transmits the traffic together with the information indicating that the traffic characteristic is data traffic to the control unit 110. The controller 110 transfers the received traffic to the second port 150 to transmit the traffic. In the embodiment of the present invention, in case of data traffic, the control unit 110 transmits the received data to the second port 150 through the common LAN network, (140).

If it is determined in step S130 that the corresponding traffic is management traffic, the interworking unit 120 transmits the traffic along with the information indicating that the traffic characteristics are management traffic to the controller 110. [ In the embodiment of the present invention, in the case of management traffic, it is determined whether to transmit through a general network transmission scheme or a power line communication scheme through a LAN cable based on the degree of traffic on the current network.

Therefore, the data transmission / reception unit 111 of the control unit 110 confirms information indicating the degree of traffic on the current network among the data received from the outside. If the degree of network traffic is higher than a predetermined threshold, the controller 110 determines to transmit the management traffic using the power line communication scheme in order to secure the bandwidth of the data traffic. Then, the management traffic is transmitted to the power line communication module 130 and transmitted through the power line communication method (S120).

However, if the current traffic level on the network is lower than a preset threshold value, the controller 110 determines that the bandwidth of the current data traffic is sufficient. Accordingly, the control unit 110 determines that the corresponding management traffic is transmitted through a general LAN cable. Then, the management traffic is transmitted to the second port 150 and transmitted through the network cable (S140).

The bandwidth performance of the data traffic in the case of controlling the traffic transmission by the above-described method will be described with reference to FIG.

4 is an exemplary diagram illustrating an improvement in data traffic bandwidth performance in accordance with an embodiment of the present invention.

As shown in FIG. 4, when a conventional software-defined network device is used, data traffic having a relatively long flow length and control traffic or management traffic having a short flow frequently frequently collide with each other. There is a drawback that can not be.

However, in the case of using the software defined network device according to the embodiment of the present invention, it is possible to control the data traffic bandwidth and to control the management traffic to be transmitted through either the network communication method or the power line communication method depending on the situation By preventing interference with data traffic, a large amount of data traffic bandwidth can be secured.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (9)

In a software defined network device,
An interworking unit for detecting whether or not traffic is generated and determining characteristics of the generated traffic;
A control unit for determining whether to transmit the generated traffic through a first communication method or a second communication method based on characteristics of traffic determined by the interlocking unit;
A power line communication module interlocked with the control unit and receiving traffic to be transmitted through the first communication method from the control unit;
A first port coupled to the power line communication module and transmitting the traffic to be transmitted through the first communication method; And
A second port for transmitting the traffic to be transmitted through the second communication method,
The software defined network device comprising: The method according to claim 1,
Wherein,
A data plane for processing data traffic among the traffic received from the linkage unit;
A management plane for processing management traffic among the traffic received from the linking unit and determining whether to transmit the management traffic through one of the first communication method and the second communication method based on data transmitted from the outside, ;
A control plane for processing control traffic among the traffic received from the linkage unit; And
A data transmission / reception section for receiving the data transmitted from the outside and providing the received data to the data plane, the management plane and the control plane,
The software defined network device comprising: 3. The method of claim 2,
Wherein the data plane comprises:
An interlocking unit for transmitting and receiving data received from the outside to share with the management plane; And
And a LAN connection connected to the second port to transmit the data traffic through the second port,
The software defined network device comprising: 3. The method of claim 2,
Wherein the management plane comprises:
An interlocking unit for transmitting / receiving data received from the outside to the management plane and the control plane;
A LAN connection unit connected to the second port to transmit the management traffic through the second port; And
And a power line communication connection unit coupled to the power line communication module to transmit the management traffic through the first port,
The software defined network device comprising: 3. The method of claim 2,
Wherein the control plane comprises:
An interlocking unit for transmitting and receiving data received from the outside to share with the management plane; And
And a power line communication connection unit coupled to the power line communication module to transmit the control traffic through the first port,
The software defined network device comprising: 3. The method of claim 2,
Wherein the first communication method is a power line communication method and the second communication method is a network communication method. CLAIMS What is claimed is: 1. A method for a software defined network device to control traffic transmission,
Detecting traffic to be transmitted;
Checking traffic characteristic information indicating whether the detected traffic is control traffic, management traffic, or data traffic; And
Controlling the traffic to be transmitted through one of a first communication method and a second communication method based on the determined traffic characteristic information
≪ / RTI > 8. The method of claim 7,
Wherein the transmitting the traffic comprises:
If the determined traffic characteristic information is control traffic, transmitting through the power line communication method as the first communication method;
If the determined traffic characteristic information is data traffic, transmitting through the network communication method as the second communication method; And
If the checked traffic characteristic information is a management traffic, transmitting through the first communication method or the second communication method
≪ / RTI > 9. The method of claim 8,
The method as claimed in any one of the preceding claims,
Determining whether a current amount of data traffic is higher than a predetermined threshold based on information received from outside;
Transmitting the management traffic through the first communication method if the current amount of data traffic is higher than a predetermined threshold; And
If the current amount of data traffic is lower than a predetermined threshold, transmitting the management traffic through the second communication method
≪ / RTI >
KR20130112190A 2013-09-17 2013-09-17 Apparatus for software defined network and method for control thereof KR20150032127A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111030731A (en) * 2019-11-25 2020-04-17 华南理工大学 Power line carrier communication-based software-defined power Internet of things architecture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111030731A (en) * 2019-11-25 2020-04-17 华南理工大学 Power line carrier communication-based software-defined power Internet of things architecture
CN111030731B (en) * 2019-11-25 2021-08-10 华南理工大学 Power line carrier communication-based software-defined power Internet of things architecture

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