KR20150089467A - Central network unification apparatus - Google Patents

Central network unification apparatus Download PDF

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Publication number
KR20150089467A
KR20150089467A KR1020140010124A KR20140010124A KR20150089467A KR 20150089467 A KR20150089467 A KR 20150089467A KR 1020140010124 A KR1020140010124 A KR 1020140010124A KR 20140010124 A KR20140010124 A KR 20140010124A KR 20150089467 A KR20150089467 A KR 20150089467A
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South Korea
Prior art keywords
unit
voltage
central
network modem
network
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KR1020140010124A
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Korean (ko)
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이일묵
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이일묵
이문하
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Priority to KR1020140010124A priority Critical patent/KR20150089467A/en
Publication of KR20150089467A publication Critical patent/KR20150089467A/en

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/001—Analogue/digital/analogue conversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854—Wide area networks, e.g. public data networks
    • H04L12/2856—Access arrangements, e.g. Internet access
    • H04L12/2869—Operational details of access network equipments
    • H04L12/2898—Subscriber equipments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/02—Standardisation; Integration
    • H04L41/022—Multivendor or multi-standard integration

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

Abstract

The present invention relates to a central network integration apparatus, which comprises: a central external connection unit receiving analog signals from each of the multiple network modem devices; a data integration unit converting the analog signals received from each of the multiple network modem devices, through the central external connection unit, into digital data and then outputting the converted digital data; and a DC voltage generation unit receiving commercial power to generate predefined level of DC voltage. Therefore, even if an analog camera is replaced by a digital camera a user can use the existing coaxial cable and it is possible to build a network at low costs.

Description

[0001] CENTRAL NETWORK UNIFICATION APPARATUS [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a central network integration apparatus, and more particularly, to a central network integration apparatus capable of receiving analog signals from a plurality of network modem apparatuses and converting and integrating them into digital data.

Conventionally, analog cameras have been widely used, and video images taken by analog cameras have been transferred to the management apparatus through coaxial cables. However, in recent years, analog cameras have gradually been replaced by digital cameras in response to the demands of users who demand high image quality.

When replacing an analog camera with a digital camera, instead of just replacing the analog camera, you need to install a new cable suitable for digital transmission instead of the analogue coaxial cable that was already installed. In this case, upgrading is not easy due to the increase in new installation and construction costs.

On the other hand, Power Line Communication (PLC) is used to transmit and receive data. Power line communication refers to a communication system that transmits and receives data through a power line wired for power supply to a home or office. That is, the power line communication can be realized by modulating the data information into the high-frequency signal on the power line and transmitting the high-frequency signal by separating and receiving the high-frequency signal using the filter having the cutoff frequency of 50 Hz or 60 Hz.

A method of transmitting an analog signal and a digital signal using such power line communication is disclosed in Korean Patent Laid-Open Publication No. 2013-0042086. However, such a power line communication scheme is not suitable for a coaxial cable, and another cost increase is required for applying a power line communication scheme.

In order to solve the above-mentioned problems, the present inventors have invented a network modem device which can use existing coaxial cable as it is and replace it with a digital camera instead of an analog camera, Respectively.

However, connecting the receiving network modem device on a one-to-one basis to receive the analog signals provided in each of the plurality of network modem devices may lead to an increase in cost.

Patent Document 1: Korean Patent Publication No. 2013-0042086

In order to solve the above-described problems, it is an object of the present invention to provide a central network integrated device capable of receiving analog signals from a plurality of network modem devices, converting them into digital data, and integrating them.

In order to achieve the above object, a central network aggregation apparatus according to an embodiment of the present invention includes a central external connection unit for receiving an analog signal from each of a plurality of network modem apparatuses, A data integration unit for converting an analog signal received from each of the network modem devices of the network modem devices into digital data and integrating and outputting the digital data, and a DC voltage generating unit for receiving a commercial power supply and generating a predetermined DC voltage.

The data integration unit may receive the OFDM signal as an analog signal and output the Ethernet packet data as digital data.

The data integration unit includes a central data conversion chip for converting the OFDM signal into the Ethernet packet data, a network processor for collectively managing the digital data output from the central data conversion chip, Lt; RTI ID = 0.0 > PHY < / RTI >

The central network integrator may further include a voltage supply unit for supplying a predetermined DC voltage generated by the DC voltage generation unit to the plurality of network modem devices through the central external connection unit.

Wherein the voltage supply unit includes a switching unit for supplying or blocking a predetermined DC voltage generated in the DC voltage generating unit to the plurality of network modem devices via the central external connection unit, And a switching driver for turning on or off the switching unit.

The voltage supply unit may further include a current detector for detecting a current flowing in any one of the plurality of network modem apparatuses.

The switching driver may output a turn-off signal for turning off the switching unit when the detection signal detected by the current detector is at a level indicating an overcurrent.

The centralized network integration apparatus may further include an LED unit for indicating a status of the plurality of network modem apparatuses.

According to the above-described configuration, even if the present invention is replaced with a digital camera instead of an analog camera, the existing coaxial cable can be used as it is, and the network can be constructed at low cost.

Also, in the present invention, a network modem device or the like is installed in a region where no commercial power is supplied, so that communication can be performed.

Further, according to the present invention, when an overcurrent flows in any one of a plurality of network modem apparatuses, it is possible to reduce unnecessary power consumption and to continue communication with a normal apparatus.

1 is a schematic diagram illustrating a network modem system according to an embodiment of the present invention.
2 is a block diagram of the network modem apparatus shown in FIG.
3 is a block diagram of the central network integration apparatus shown in FIG.
4 is a diagram showing a switching unit and a current detection unit of the voltage supply unit shown in FIG.
FIG. 5 is a diagram showing a switching driver of the voltage supply unit shown in FIG. 3. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a central network integration apparatus according to the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the technical scope of the present invention. Will be.

1 is a schematic diagram illustrating a network modem system according to an embodiment of the present invention.

1, the network modem system includes a first IP camera apparatus 110-1, a first network modem apparatus 120-1, a second IP camera apparatus 110-2, a second network modem apparatus 110-1, A central network integration device 130 and a computer 140. [ The first IP camera apparatus 110-1 and the first network modem apparatus 120-1 and the second IP camera apparatus 110-2 and the second network modem apparatus 120-2 are connected to a LAN The first network modem apparatus 120-1 and the second network modem apparatus 120-2 and the central network integrator 130 are connected to each other by a coaxial cable 160, The computer 130 and the computer 140 are connected to the LAN 150 again.

The first IP camera device 110-1 and the second IP camera device 110-2 are camera devices that can be connected to the wired / wireless Internet and include a camera module, an image compression chip, a CPU, and a network transmission chip. The analog signal received from the camera module is converted into digital data from the image compression chip and then compressed and transmitted to the first network modem device 120-1 and the second network modem device 120-2 via the network transmission chip, respectively. In the present invention, Ethernet packet data is described with digital data output from the first IP camera apparatus 110-1 and the second IP camera apparatus 110-2, for example.

The first network modem apparatus 120-1 and the second network modem apparatus 120-2 have the same configuration, and the first network modem apparatus 120-1 and the second network modem apparatus 120-2 have the same configuration Converts the digital data transmitted from the first IP camera apparatus 110-1 and the second IP camera apparatus 110-2 into an analog signal suitable for the coaxial cable 160, and outputs the analog signal.

The central network integration device 130 receives the analog signals transmitted from the first network modem device 120-1 and the second network modem device 120-2 via the coaxial cable 160, respectively. The central network integration device 130 collects analog signals transmitted from the first network modem device 120-1 and the second network modem device 120-2, respectively, and converts the analog signals into digital data and Ethernet packet data, do.

The computer 140 receives the digital data transmitted from the central network integrator 130 via the LAN 150, and stores the received data in a memory.

Although only the first network modem apparatus 120-1 and the second network modem apparatus 120-2 are shown in FIG. 1, the number of the network modem apparatus 120 may vary depending on the design of the network modem system .

2 is a block diagram of the network modem apparatus shown in FIG.

2, the network modem apparatus includes an external connection unit 210, a data conversion unit 220, a voltage conversion unit 230, and an external power supply unit 240. [ A unit is a term introduced to help understand the configuration, not the term introduced to physically distinguish the configuration.

1, the external connection unit 210 includes an RJ-45 connector 212 for connecting the IP camera apparatus 110, which is an external terminal apparatus, to the LAN 150, and another network modem apparatus, for example, And a coaxial connector 214 for connecting the coaxial cable 160 to the integrated device 130.

The data conversion unit 220 includes an Ethernet PHY chip 221, a data conversion chip 222, a flash memory 223, a DRAM 224, and the like in order to convert digital data into an analog signal and also convert an analog signal into digital data. A security button 225, an analog front end chip 226, a transmit filter 227, a receive filter 228 and a matching transform 229.

The Ethernet PHY chip 221 receives the digital data input from the RJ-45 connector 212, that is, the Ethernet packet data, and provides it to the data conversion chip 222.

The data conversion chip 222 converts the Ethernet packet data input from the Ethernet PHY chip 221 into an Orthogonal Frequency Division Multiplexing (OFDM) signal for a coaxial cable that multiplexes the Ethernet packet data with a plurality of orthogonal narrow band carriers.

The data conversion chip 222 internally incorporates an Ethernet-based MAC / PHY and can support a PHY speed of up to 200 Mbps, satisfying a home plug AV standard. The data conversion chip 222 may also support Internet Group Management Protocol (IGMP) for supporting multicast sessions and QoS (Quality of Service) functions for various types of quality. The data conversion chip 222 also internally includes a DAC and an ADC.

The flash memory 223 may store not only the firmware associated with the data communication but also values that can be used to set the output intensity in the analog signal transmission.

The DRAM 224 temporarily stores the Ethernet packet data provided from the Ethernet PHY chip 221 during the process of converting the data packet from the data conversion chip 222 to the OFDM signal for coaxial cable.

The security button 225 is a button that enables security settings to allow only network modem equipment having the same password to a password, for example 1234567, to communicate the coaxial cable 160 analog signal.

The analog front end chip 226 amplifies the OFDM signal for the coaxial cable output from the data conversion chip 222 and outputs it to the transmission filter 227 or the OFDM signal for the coaxial cable provided by the reception filter 228, And outputs it to the chip 222. On the other hand, the analog front-end chip 226 can control the gain and adjust the output intensity of the OFDM signal,

The transmission filter 227 is a filter for transmitting the amplified OFDM signal from the analog front end chip 226 to the matching transformer 229 and also for removing noise. The reception filter 228 is a filter for transmitting the OFDM signal provided from the matching transformer 229 to the analog front end chip 226 and also for removing noise.

The matching transformer 229 enables impedance matching with the external coaxial cable 160 and also transmits the OFDM signal provided through the transmission filter 227 to the coaxial connector 214 and the external coaxial cable 160 And coupling the OFDM signal provided to the coaxial connector 214 to the receive filter 228.

A voltage of 56 V generated in the DC voltage generating unit 330 shown in FIG. 3 may be supplied to the voltage converting unit 230 through the coaxial cable 160. The voltage conversion unit 230 converts the voltage of 56V to a voltage of 12V to be supplied to the analog front end chip 226 and a voltage of 1.26V to be supplied to the data conversion chip 222 and a voltage of 3.3V Voltage is obtained.

In the case of the voltage conversion unit 230, since a predetermined DC voltage, for example, a rated voltage at which 56 V is input or a coaxial cable 160 becomes long, a voltage drop occurs in many cases.

The external power supply unit 240 is a unit for supplying power to the LAN 150. When the commercial power is not supplied to the external terminal device such as the IP camera device 110, It is a supply unit. The external power supply unit 240 can detect the required power of the external terminal device and supply either one of two power levels, for example, 15W and 30W.

3 is a block diagram of the central network integration apparatus shown in FIG.

3, the central network integrator 130 includes a central external connection unit 310, a data integration unit 320, a DC voltage generation unit 330, a central voltage conversion unit 340, (350).

The central external connection unit 310 includes a central RJ-45 connector 312 for connecting the computer 140 and the LAN 150 as shown in FIG. 1, A first coaxial connector 314 for connecting through a cable 160 and a second coaxial connector 316 for connecting through a coaxial cable 160 to a second network modem device 120-2.

The data integration unit 320 may be configured to convert the analog signals from the first network modem device 120-1 and the second network modem device 120-2 into digital data and to integrate A central processing unit 321, a central data conversion chip 322, a flash memory 323, a DRAM 324, an LED unit 325, a central Ethernet PHY chip 326 and a network processor 327.

The central analog front end chip 321 amplifies the OFDM signal for the coaxial cable provided by the first network modem apparatus 120-1 and the second network modem apparatus 120-2 and outputs the amplified signal to the central data conversion chip 322 .

The central data conversion chip 322 converts the OFDM signal for coaxial cable inputted from the central analog front end chip 321 into Ethernet packet data. The central data conversion chip 322 internally incorporates an Ethernet-based MAC / PHY and can satisfy a home plug AV standard and support a PHY speed of up to 200 Mbps. The central data conversion chip 322 may also support Internet Group Management Protocol (IGMP) to support multicast sessions and QoS (Quality of Service) functions for various types of quality. The central data conversion chip 322 also internally includes a DAC and an ADC.

The flash memory 323 may store not only firmware associated with data communication but also control methods for a plurality of coaxial connectors.

The DRAM 324 temporarily stores the OFDM signal for the coaxial cable provided from the central analog front end chip 321 during conversion from the central data conversion chip 322 to the Ethernet packet data.

The LED unit 325 displays the status of the central network integrator 130 and the network modem apparatus 120. [ For example, if the first network modem apparatus 120-1 fails, the LED unit 325 can display the failure.

The central Ethernet PHY chip 326 receives and provides digital data, i.e., Ethernet packet data, provided by the central data conversion chip 322 to the central RJ-45 connector 312.

The network processor 327 exchanges Ethernet packet data between the upper network and the lower network, and can process various types of routing, IGMP, and QoS. The network processor 327 also provides a graphical user interface (GUI) so that the user can conveniently manage it, and takes charge of various information collection and data statistics.

The DC voltage generating unit 330 receives a commercial power supply and generates a predetermined DC voltage, for example, a DC voltage of 56V. The DC voltage generated in the DC voltage generating unit 330 may be supplied to the first network modem apparatus 120-1 and the second network modem apparatus 120-2 through an external power supply unit (not shown) .

A DC voltage of 56V is supplied from the DC voltage generating unit 330 to the central voltage converting unit 340. [ The central voltage conversion unit 340 converts the voltage of 56V to provide a 12V voltage to be supplied to the central analog front end chip 321, a voltage of 1.26V to be supplied to the central data conversion chip 322, 3.3V voltage can be obtained.

The voltage supply unit 350 supplies a voltage to each of the first network modem apparatus 120-1 and the second network modem apparatus 120-2 and also supplies the voltages to the first network modem apparatus 120-1 and the second network modem apparatus 120-2, When the modem device 120-2 is overloaded, the modem device 120-2 automatically detects the overload and cuts off the power. The voltage supply unit 350 also performs a shutdown function for the connector when an unexpected cable short circuit or the like occurs in the installation environment.

FIG. 4 is a view showing a switching unit and a current detection unit of the voltage supply unit shown in FIG. 3, and FIG. 5 is a view illustrating a switching drive unit of the voltage supply unit shown in FIG.

The switching unit 410 supplies a predetermined DC voltage, that is, a voltage of 56V, to each of the first network modem apparatus 120-1 and the second network modem apparatus 120-2. The switching unit 410 includes a resistor R1, a resistor R2, a transistor Q1, a resistor R3, a resistor R4, a switching element SW, a fuse F1, an inductor L1 and a capacitor C1.

When the input signal PWR_CTL_1 of the switching unit 410 is at a high level, the voltage is distributed by the resistance values of the resistors R1 and R2, and the transistor Q1 is turned on by the voltage of the resistor R2. When the transistor Q1 is turned on, the DC voltage 56V is distributed to the resistor R3 and the resistor R4, thereby turning on the switching element SW. When the switching element SW is turned on, the DC voltage 56V is supplied to the P terminal of the first coaxial connector 314 through the fuse F1, the inductor L1 and the capacitor C1.

The current detection unit 420 detects currents flowing through the first network modem apparatus 120-1 and the second network modem apparatus 120-2, respectively. In particular, the current detector 420 detects whether an overcurrent flows through the first network modem apparatus 120-1 and the second network modem apparatus 120-2, respectively. The current detector 420 includes a resistor R11, a resistor R12, a transistor Q11, a resistor R13, a resistor R14, an operational amplifier OP11, a capacitor C11, and a capacitor C12.

When the switching element SW of the switching part 410 is turned on, a current flows through the resistor R5. When a current flows through the resistor R5, a non-inverting voltage is supplied to the non-inverting terminal of the operational amplifier OP11. Also, the inverted voltage dropped by the fine current is supplied to the inverting terminal of the operational amplifier OP11 by the resistor R11. At the normal time, since the non-inverting voltage of the non-inverting terminal of the operational amplifier OP11 is higher than the voltage of the inverting terminal, a high level is outputted to the output terminal. Thus, the transistor Q11 maintains the turn-off state, so that the current detection signal LVL_1 becomes low level. However, when the overcurrent flows through the resistor R5, the voltage drop at the resistor R5 becomes large, whereby a voltage lower than the inverting terminal is supplied to the non-inverting terminal of the operational amplifier OP11. Therefore, the transistor Q11 is turned on, and the current detection signal LVL_1 becomes a high level. The current detection signal LVL_1 is supplied to the network processor, and the network processor controls the switching signal P_ON_1 output to the switching driver 510 to a low level when the current detection signal LVL_1 is at a high level.

The switching driver 510 drives the switching unit 410 using the switching signal P_ON_1 provided from the network processor 327 and the current detection signal LVL_1 provided from the current detector 420. The switching driver 510 includes a resistor R21, a resistor R22, a resistor R23, an operational amplifier OP21, a capacitor C21, a resistor R24, a NOR gate circuit NOR21, a NOR gate circuit NOR22, a capacitor C22, a capacitor C23 and a resistor R25.

When the switching signal P_ON_1 provided by the network processor 327 is at a high level, the voltage is distributed by the resistors R21 and R22, the voltage of the resistor R22 is supplied to the inverting terminal of the operational amplifier OP21, The current detection signal LVL_1 is supplied. In a normal case, a low level is supplied. In this case, the output of the operational amplifier OP21 becomes low level.

When the switching signal P_ON_1 provided in the network processor 327 is switched from low level to high level, a high level is provided to the second input terminal of the NOR gate circuit NOR22 in a transitional period, whereby the output of the NOR gate circuit NOR22 becomes low level . Since the low level is supplied to both the input terminals of the NOR gate circuit NOR21, the output of the NOR gate circuit NOR21 becomes high level.

On the other hand, when the current detection signal LVL_1 becomes a high level due to the overcurrent, a voltage higher than the inverting terminal is supplied to the non-inverting terminal of the operational amplifier OP21, so that the output of the operational amplifier OP21 becomes high level, The output signal, the input signal PWR_CTL_1 of the switching unit 410 becomes low level. Therefore, since the switching element SW of the switching unit 410 is turned off, the current supplied to the network modem apparatus 120 is cut off.

The embodiments of the present invention described above are merely illustrative of the technical idea of the present invention, and the scope of protection of the present invention should be interpreted according to the claims. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. It should be interpreted that it is included in the scope of right.

110: IP camera device 120: network modem device
130: central network integration device 140: computer
210: external connection unit 220: data conversion unit
221: Ethernet PHY chip 222: Data conversion chip
223: flash memory 224: DRAM
225: security button 226: analog front end chip
227: Transmit filter 228: Receive filter
229: matching transformer 230: voltage conversion unit
240: External power supply unit 310: Central external connection unit
320: data integration unit 321: central analog front end chip
322: central data conversion chip 323: flash memory
324: DRAM 325: LED section
326: Central Ethernet PHY chip 330: DC voltage generating unit
340: Central voltage conversion unit 350: Voltage supply unit

Claims (8)

A central external connection unit for receiving an analog signal from each of the plurality of network modem devices,
A data integration unit converting the analog signals received from each of the plurality of network modem devices through the central external connection unit into digital data, integrating and outputting the digital signals, and
And a DC voltage generating unit for receiving a commercial power supply and generating a predetermined DC voltage. The method according to claim 1,
Wherein the data integration unit receives the OFDM signal as an analog signal and outputs Ethernet packet data as digital data. 3. The method of claim 2,
The data integration unit includes a central data conversion chip for converting the OFDM signal into the Ethernet packet data, a network processor for collectively managing the digital data output from the central data conversion chip, And a central Ethernet PHY chip for providing the external device with an external device. 4. The method according to any one of claims 1 to 3,
Further comprising a voltage supply unit for supplying a predetermined DC voltage generated by the DC voltage generation unit to the plurality of network modem devices via the central external connection unit. 5. The method of claim 4,
Wherein the voltage supply unit includes a switching unit for supplying or blocking a predetermined DC voltage generated in the DC voltage generating unit to the plurality of network modem devices via the central external connection unit, And a switching driver for turning on or off the switching unit. 6. The method of claim 5,
Wherein the voltage supply unit further comprises a current detection unit for detecting a current flowing in any one of the plurality of network modem apparatuses. The method according to claim 6,
Wherein the switching driver outputs a turn-off signal to turn off the switching unit when the detection signal detected by the current detecting unit indicates a level indicative of an overcurrent. 8. The method of claim 7,
Further comprising an LED unit for displaying status of the plurality of network modem devices.
KR1020140010124A 2014-01-28 2014-01-28 Central network unification apparatus KR20150089467A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200144224A (en) * 2019-06-18 2020-12-29 주식회사 엘지유플러스 Communication modem, communication system comprising the communication modem, and construction method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200144224A (en) * 2019-06-18 2020-12-29 주식회사 엘지유플러스 Communication modem, communication system comprising the communication modem, and construction method thereof

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