KR102290453B1 - Network device for school - Google Patents

Abstract

The present invention relates to an intra-school network device and, more specifically, to an intra-school network device which uses a passive optical network (PON) method to utilize an integrated education office network including a teacher network, a student network, a wireless network, and a telephone network, and defines a communication method for each network in a predetermined profile format to efficiently manage the network. According to the present invention, the intra-school network device uses a PON method between an optical distributor and an optical demodulator and is configured to fuse data communicated by using each of the teacher network, the telephone network, the student network, and the wireless network as an IP network to be communicated in an optical data type. The optical demodulator processes optical data by using a virtual LAN (VLAN) having each of the teacher network, the telephone network, the student network, and the wireless network as a tag. The optical demodulator comprises a communication interface including: an input module receiving the optical data; a processing module demodulating the optical data so that the optical data is communicated through four IP networks; and an output module outputting the demodulated IP data.

Description

Intra-school network device {NETWORK DEVICE FOR SCHOOL}

The present invention relates to an intra-school network network device, and more particularly, utilizing an optical communication network employing a passive element to utilize the school office concentrator network including a teacher network, a student network, a wireless network, and a telephone network for intra-school network communication, It relates to an intra-school network device that improves the efficiency and stability of network communication by using it in the form of a profile.

The purpose of the school is to aim for the growth and development of the ability of the trainees through the learning of human beings through cultural values (language, science, technology, art, etc.). Training and nurturing of culture, etc.

And with the advent of the so-called information age, which centers on the production and delivery of various information, with computers, multimedia, and communication as the main media, the processing, storage, and retrieval of data that can become information is essential for all social and economic exchanges. became an important resource. As a result, the intra-school network is continuously being developed as the school needs it realistically, such as helping students to improve their academic performance and making the work of teachers into data.

As a prior art to this, Korean Patent Laid-Open Patent Publication No. 10-2013-0042767 relates to a method and system for conducting a class using a wired/wireless communication network. , so that classes can be conducted using terminals (e.g., laptops or smart pads) used by teachers and students (class participants) in a wireless communication network environment as well as a wired communication network between servers for each institution when conducting a class by group. It is characterized in that it has the advantage of being able to provide a convenient educational environment. However, there is a problem that the teacher network, telephone network, student network, and wireless network, which are the centralized networks of the education office, do not allow communication in each place in the school, and that the overall network within the school using this cannot provide an environmental system.

In addition, as another prior art, a network education system for a classroom and an education method using the same, which are Korean Patent Laid-Open Publication No. 10-2002-0002102 (published on Feb. 09, 2002), transmit and receive data related to learning between teachers and students in the classroom. In the classroom network education system, the teacher computer terminal, the electronic book terminal equipped with a wireless communication module, and a wireless communication device installed at a predetermined location in the classroom to relay wireless communication between the teacher computer terminal and the electronic book terminal It consists of communication relay means.

Such prior art is only about building a network education system to reduce installation and operation costs, prevent noise or heat generation, and minimize power consumption. There are problems in that communication cannot be made in each place on campus, as well as the amount of wiring cannot be significantly reduced when constructing a network, and the amount of traffic cannot be effectively controlled.

The present invention has been devised to solve the above problems, and the present invention aims to provide an intra-school network device that enables communication between the teacher network, the telephone network, the student network, and the wireless network, which are the centralized networks of the education office. .

In addition, it is possible to reduce the network construction and operation cost by significantly reducing the amount of wiring, and also aims to provide an intra-school network network device with improved transmission reliability due to the characteristics of optical fiber without electrical interference.

Another object of the present invention is to provide a network device having improved communication reliability and speed by automatically controlling excessive traffic when it occurs.

In the intra-school network device according to the present invention for the purpose of solving the above problems, the communication between the optical splitter and the optical demodulator is a PON (Passive Optical Network) method, and each of the teacher network, the telephone network, the student network and the wireless network is IP The data communicated using the network are fused to communicate in the form of optical data, and the optical demodulator uses the optical data as a tag for each of the teacher network, telephone network, student network, and wireless network as a tag. The optical demodulator includes an input module for receiving the optical data, a processing module for demodulating the optical data so that data is communicated through four IP networks, and an output module for outputting demodulated IP data communication interface.

In addition, the processing module includes a network definition unit defining the aggregation network as the teacher network, telephone network, student network and wireless network, a communication method definition unit defining a communication method for each network defined by the network definition unit, and each a tag allocator for allocating an independent tag to a network, wherein the communication interface further includes a branch port to configure a network for each network to which the independent tag is allocated, wherein the branch port is the processing module It is mounted on the substrate on which it is mounted.

In addition, the processing module further includes a looping prevention unit for controlling the amount of traffic received to the input module, wherein the looping prevention unit is configured to control the amount of traffic of the IP data using a Storm-Control setting.

In addition, the Strom-Control setting is configured to block the amount of traffic received to the input module for more than 30 seconds when the inflow of IP data having the same tag information exceeds 300 pps (Packet Per Second).

The present invention having the above configuration and characteristics has an advantage that communication can be made between the teacher network, the telephone network, the student network, and the wireless network, which are the centralized networks of the education office at each place in the school.

In addition, by significantly reducing the amount of wiring, it is possible to reduce network construction and operation costs, and has the advantage of having improved transmission reliability due to the characteristics of optical fibers without electrical interference.

In addition, it has the advantage of improving the reliability and speed of communication by automatically controlling excessive traffic when it occurs.

1 to 3 are diagrams showing the setting of an intra-school network network system according to the present invention.
4 is a conceptual diagram illustrating the concept of looping.
5 is a view showing the interior of the enclosure.
6 is a view showing the outside of the enclosure.

The present invention is intended to be described in detail in the text of the embodiment (態樣, aspect) (or embodiments) can be applied to various changes and can have various forms. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

The terminology used herein is only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as comprises or consists of are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

~1~, ~2~, etc. described in the present specification will be referred to only to distinguish that they are different components, and are not limited to the order of manufacture, and their names in the detailed description and claims of the invention are may not match.

The present invention relates to an intra-school network network device, and more particularly, using a PON (Passive Optical Network) method to utilize the school office concentrator network including a teacher network, a student network, a wireless network, and a telephone network for intra-school network communication, It relates to an intra-school network network device that enables efficient network management by defining a communication method for each network in the form of a profile.

First, the campus network device using the PON (Passive Optical Network) method will be described. The PON method configures the network as a passive device rather than an active device. In the conventional case, the optical communication method was a 1:1 connection from the center to the subscriber. In the PON, one optical line is installed up to a certain distance, and multiple lines can be distributed around a splitter. In other words, it is possible to significantly reduce the cost compared to installing a 1:1 optical cable from the optical transmitter (OLT) to the optical receiver (ONT). Since it is replaced by an optical couple, it is also easy to maintain. Therefore, the PON port may be provided in the optical multiplexer, the optical splitter, and the optical demodulator. And here, the optical multiplexer plays the role of the optical transmitter (OLT) and the optical demodulator plays the role of the optical receiver (ONT).

In addition, Gigabit PON (GPON) may be used as an embodiment of the PON scheme, where GPON is one of FTTH (Fiber to the Home) technologies standardized through ITU-T to service various multi-protocols, and a GEM port It classifies services provided to clients using IDs, and provides QoS (Quality of Service) of the services in units of T-CONT queues (Traffic Container Queue). And the T-CONT queue has the same structure as the existing CoS (Class of Service) level queue.

The present invention includes an optical splitter that communicates with an education office concentrator network consisting of a teacher network, a telephone network, a student network, and a wireless network and an optical cable, and a plurality of optical demodulators installed in a plurality of campus locations to communicate with the optical splitter through optical cables Corresponds to the campus network device.

And it may further include an optical multiplexer designed in the school computer room to communicate with the four networks consisting of the teacher network, the telephone network, the student network, and the wireless network, which are the centralized networks of the education office, and the optical splitter is connected to the optical multiplexer and the first optical cable. can be connected

And the optical splitter to which the first optical cable is connected is installed in the terminal box at the end of the corridor to form a first network line with the optical multiplexer as the first optical cable is connected, and the second optical cable is distributed to be connected to the optical demodulator installed in each classroom do.

That is, the optical splitter forms a first network line with the optical multiplexer as it is connected to the distributed first optical cable, and the teacher network, telephone network, student network, and wireless network are all provided, but in part or all of it is used in the campus place. A plurality of second optical cables are distributed to provide.

In addition, the first and second optical cables may be configured such that data communicated using each of the teacher network, the telephone network, the student network, and the wireless network as an IP network are fused to communicate in the form of optical data. Therefore, it is possible to provide a data network, a voice network, etc. as a single unified infrastructure, and also, it is possible to have improved transmission reliability due to the characteristics of an optical fiber without electrical interference.

That is, the communication between the optical splitter and the optical demodulator or the demodulation period is a PON (Passive Optical Network) method, in which data communicated using each of the teacher network, telephone network, student network, and wireless network as IP networks are fused. It is configured to communicate in the form of optical data.

Of course, communication at this time is performed by a communication interface, which includes both a switch function in L2 (Layer 2) and a relay function in L3 (Layer 3). In addition, the communication interface may be provided in an optical multiplexer or an optical demodulator.

And, as shown in FIG. 1, the optical demodulator processes the optical data using a virtual LAN (VLAN) having each of the teacher network, telephone network, student network, and wireless network as tags, and the optical demodulator includes the optical data and a communication interface including an input module for receiving data, a processing module for demodulating the optical data so that data is communicated through four IP networks, and an output module for outputting demodulated IP data.

Here, demodulating optical data means converting optical data used in optical networks into data types that can be used in each IP network. Of course, in this case, the communication direction corresponds to the Down Stream, and in the case of the Up Stream, it is of course possible to perform a modulation process.

In addition, the processing module 2 includes a network definition unit that defines the aggregation network as the teacher network, telephone network, student network, and wireless network, and a communication method definition unit that defines a communication method for each network defined by the network definition unit. and a tag allocator for allocating independent tags to the respective networks. In addition, the processing module 2 may employ a CPU 21 generally used in the industry.

For example, it can be defined as a virtual LAN of V10 for a teacher network, V20 for a student network, V30 for a wireless network, and V40 for a telephone network. , TAG30 when communication between wireless networks is required, or TAG40 when communication between telephone networks is required, communication can be performed in the 802.1Q trunk method.

In addition, among the optical demodulators arranged in the school, optical demodulators having the same VLAN can communicate with each other.

The processing module 2 further includes a looping prevention unit for controlling the amount of traffic received to the input module, and as shown in FIG. 1 , the looping prevention unit uses the Storm-Control setting to control the amount of traffic of the IP data. to control

As shown in FIG. 4, "looping" means that when communication interfaces composed of a first communication interface, a second communication interface, and a third communication interface form a closed loop, the broadcast data is ( Strictly speaking, it means that the phenomenon of endless looping occurs in a closed loop).

And, as shown in FIG. 2, the communication interface can detect looping through the Self-Loop-Detect command.

And in order to prevent this, the looping prevention unit may be configured to prevent looping by cutting off communication when the drifting data arrives at the first transmission destination after rotating once. Here, one rotation means that when data is transmitted in a broadcast format from the first communication interface, it goes through the second and third communication interfaces and returns to the first communication interface, where the data passes through each communication interface once and goes through each communication interface once for the first time. It means that it has arrived at the destination. And the Storm-Control setting may be used as an embodiment for such a looping prevention unit.

In addition, the Strom-Control setting may be configured to block the amount of traffic received to the input module for 30 seconds or longer when the inflow of IP data having the same tag information exceeds 300 pps (Packet Per Second). In particular, when 300pps is exceeded, the load on each network increases, so it can be blocked for more than 30 seconds to promote smooth network use.

And, as shown in FIG. 1, it is possible to control so that the processing amount of a broadcast frame or a multicast frame does not exceed 500, and in the case of DLF (Destination Look Up Fale), traffic of frames transmitted to the same broadcast domain The amount can also be controlled so that it does not exceed 500.

And the advantage of the Storm-Control setting is that the corresponding traffic can be controlled for all unicast, multicast, and broadcast traffic. Of course, the communication interface must have a multicast function.

And the communication interface includes a priority determining unit for determining the priority of the communication when performing the communication.

Determining the priority of communication here means using QoS (Quality of Service) to adjust the latency, jitter, and packet loss ratio of data (packets, frames) to a desired level. to maintain the service of

As a command for setting such QoS, the mls qos command may be used.

And here, as an embodiment, Class of Service (CoS) and Different Services Code Point (DSCP) may be used as data (packet or frame) traffic classification standards.

CoS means a 3-bit value indicating priority in IEEE 802.1Q/802.1P, and the higher the CoS value, the higher the priority.

In addition, DSCP means to indicate the priority of a packet by using 6 bits among an 8-bit field called ToS (Type of Service) in the packet header of IPV4, and the higher the DSCP value, the higher the priority. That is, CoS is a criterion for determining the priority of frame traffic in the Layer 2 layer, and DSCP is a criterion for determining the priority of packet traffic in the Layer 3 layer.

And DSCP is trusted with the Pass-Through option, which divides the input frame according to the CoS value to perform QoS policy, but does not change the DSCP value, and says to pass the data to the next communication interface. means that That is, the DSCP value does not follow the DSCP value according to the determined CoS value, but in the frame traffic of Layer 2, the traffic priority is determined according to the CoS value, and in the packet traffic of the Layer 3, the traffic priority is determined according to the DSCP.

And the communication interface includes a tag identification unit for identifying the independent tag tagged in each network, and a relay unit for performing communication between networks having a tag different from the network having the tag identified by the tag identification unit. do.

That is, the tag number tagged in the data (frame) is identified by the tag identification unit, so that the data can be routed by the relay unit during communication between VLANs that are not identical. Of course, as described above, in the packet traffic control of the relay unit (Layer 3), the traffic priority can be determined according to the DSCP.

And, as shown in FIG. 3, the information set by FIGS. 1 and 2 can be applied when registering the optical demodulator. More strictly, it is applied to the communication interface included in the optical demodulator.

A characteristic point here is that each network can be allocated by dividing it into static IP allocation or dynamic IP allocation.

Meanwhile, hereinafter, the optical demodulator, the housing (H) of the optical demodulator, and a communication interface built in the housing (H) will be described.

First, the communication interface may be composed of an input module (1), a processing module (2), and an output module (3).

Here, the input module 1 has an inlet through which an optical cable is introduced, and the optical data is input to the inlet.

Then, the input module 1 transmits the optical data to the processing module 2, and as described above, the processing module 2 transfers the aggregation network to the teacher network, the telephone network, the student network, and the wireless network. a network defining unit defining, a communication method defining unit defining a communication method for each network defined by the network defining unit, and a tag allocating unit allocating an independent tag to each network, wherein the communication interface includes the independent It further includes a branch port 22 so as to configure a network for each network to which the in-tag is assigned, wherein the branch port 22 is mounted on a substrate on which the processing module 2 is mounted.

As such, the branch port 22 is mounted on the substrate on which the processing module 2 is mounted, so that the internal space of the housing H can be efficiently used.

And as shown in FIG. 5 , a branch network cable connected to each branch port 22 is connected to the output module 3 .

And the output module 3 is provided with an output port 31 on the outer surface of the housing (H), and can be connected to the network equipment of the end device (End Device) located in the classroom.

And a characteristic point is that, as shown in FIG. 5 , the input module 1 and the output module 3 are provided together on one side of the built-in space of the housing H, and the processing module 2 is the housing ( H) is provided on the other side of the built-in space.

And a heat dissipation hole 4 is provided along the width direction of the housing (H) on one side of the outer surface of the housing (H) in which the input module (1) and the output module (3) are provided.

And, as shown in FIG. 6 , the heat dissipation hole 4 is an elliptical long hole, and the direction of the major axis corresponds to the height direction of the housing (H). The reason is that, as a result of the input module 1 and the output module 3 being provided together on one side, the two are provided up/down along the height direction, in order to secure heat dissipation performance in response thereto.

And, as shown in FIG. 5 , the interior space of the housing H includes a protruding member 5 protruding in the height direction so as to have a through hole therein at the lower side of the processing module 2 .

The protruding member 5 is configured in the form of a cylindrical bar to protrude in the height direction from the bottom surface of the housing (H). Accordingly, the cylindrical bar is configured in the shape of a digwan and can have a through hole therein, through which various cables can pass. And, since the protruding member 5 is composed of a cylindrical bar, the cable can be smoothly entered and exited, and there is an advantage that the cable can not be damaged.

The present invention described above with reference to the accompanying drawings is capable of various modifications and changes by those skilled in the art, and such modifications and changes should be construed as being included in the scope of the present invention.

H: enclosure
1: input module 2: processing module
21: CPU 22: branch port
3: output module 31: output port
4: heat sink 5: protruding member

Claims (4)

An intra-school network network device comprising an optical splitter that communicates with the school district aggregation network consisting of a teacher network, a telephone network, a student network, and a wireless network and an optical cable, and a plurality of optical demodulators installed at a plurality of campus locations to communicate with the optical splitter through optical cables In
The communication between the optical splitter and the optical demodulator is a PON (Passive Optical Network) method, so that data communicated using each of the teacher network, telephone network, student network, and wireless network as IP networks are fused to communicate in the form of optical data. composed,
The optical demodulator processes the optical data using a virtual LAN (VLAN) having each of the teacher network, telephone network, student network, and wireless network as a tag,
The optical demodulator includes an input module for receiving the optical data, a processing module for demodulating the optical data so that data is communicated through four IP networks, and an output module for outputting demodulated IP data; ,
The processing module includes: a network definition unit defining the aggregation network as the teacher network, the telephone network, the student network, and the wireless network; a communication method definition unit defining a communication method for each network defined by the network definition unit; a tag allocator for allocating a network-independent tag and a looping prevention unit for controlling the amount of traffic received by the input module;
The looping prevention unit controls the amount of traffic of the IP data using the Storm-Control setting, and the Storm-Control setting is the input module when the inflow of IP data having the same tag information exceeds 300 pps (Packet Per Second). Blocks the amount of traffic received by
The communication interface prioritizes the communication using a branch port and a CoS (Class of Service) and DSCP (Different Services Code Point) when performing communication so as to configure a network for each network to which the independent tag is assigned. a priority determining unit for determining a priority, wherein the branch port is mounted on a substrate on which the processing module is mounted,
The DSCP performs QoS policy by classifying input frames according to the CoS value when the Pass-Through option is Trust, but does not change the DSCP value, and transmits the data to the next communication interface,
The communication interface is composed of an input module, a processing module and an output module,
The input module and the output module are provided on one side of the built-in space of the housing, and the processing module is provided on the other side of the built-in space of the housing,
One side of the outer surface of the housing includes a heat dissipation hole along the width direction of the housing,
The heat dissipation hole is formed in an elliptical long hole, and the direction of the long hole is the height direction of the housing,
The interior space of the housing includes a protruding member protruding in the height direction so as to have a through hole therein at the lower side of the processing module,
The protruding member is an intra-school network network device in which a cylindrical bar is configured in a 'C' shape so as to protrude from the bottom surface of the housing in the height direction. delete delete delete

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