Power Line Communication System and Communication Device Used in the System

• US 20080279199A1
• Filed: 11/29/2006
• Published: 11/13/2008
• Est. Priority Date: 11/29/2005
• Status: Abandoned Application

• Current Assignee: LS Cable Limited (LS Corporation)
• Original Assignee: LS Cable Limited (LS Corporation)
• Inventors: Han, Kwan Hee, Choi, Hyung Suk, Park, Dong Young, Moon, Sung Wook
• Application Number:
  US12/095,165
• Publication Number:
  US 20080279199A1
• Time in Patent Office: Days
• US Class Current: 370/400
• CPC Class Codes: H04B 10/272 Star-type networks or tree-type networks
• CPC Class Codes: H04B 2203/5425 improving S/N by matching impedance, noise reduction, gain control
• CPC Class Codes: H04B 2203/5437 Wired telephone
• CPC Class Codes: H04B 2203/5445 Local network
• CPC Class Codes: H04B 2203/545 Audio/video application, e.g. interphone
• CPC Class Codes: H04B 3/542 the information being in digital form
• CPC Class Codes: H04L 12/2801 Broadband local area networks

Abstract

A lock device having a lever is disclosed, in which the lever is released to rotate a latch bolt only if a correct electronic key is authenticated while the latch bolt is hooked over the lever at normal times. In the lock device of the present invention, having a latch bolt which is placed to rotate for opening a door once an electronic key is authenticated by its recognition or entering a password, the lock device comprises a motor rotated in one direction by a signal input after the electronic key is authenticated; a pinion assembly connected with a rotation axis of the motor and rotated by an operation of the motor; a lever having one end hooked over a projection formed in the latch bolt so as not to rotate the latch bolt at normal times, connected with the pinion assembly, and rotated by rotation of the motor to release binding state of the latch bolt once the electronic key is authenticated; and the latch bolt not rotated at normal times as its projection is hooked over the lever, and rotated as the projection is released by rotation of the lever once the electronic key is authenticated. Therefore, the lock device makes the manufacture easy and improves reliability of the operation.

Claims

1. A power line communication (PLC) Digital Subscriber Line Access Multiplexer (DSLAM), comprising:

a first communication port unit connecting with a predetermined Internet Protocol (IP) network and receiving a data signal via the IP network;

a second communication port unit connecting with a predetermined telephone line, the telephone line being coupled with each of at least one telephone line that connects an exchange and at least one subscriber location;

a PLC converter converting the data signal into a PLC frame signal corresponding to a predetermined PLC protocol; and

a transmission control unit controlling the PLC frame signal to be transmitted to a predetermined coupling device, which is installed in each of the at least one subscriber location, via the telephone line that connects with the second communication port unit,

wherein the coupling device connects with each of the telephone line and a predetermined power line, couples the PLC frame signal, which is received via the telephone line, with the power link, and transmits the PLC frame signal to at least one communication terminal that is installed in the subscriber location.

2. The PLC DSLAM of claim 1, wherein the PLC converter comprises:

a Media Access Control (MAC) address converter converting a MAC address of the data signal into a MAC address corresponding to the PLC protocol; and

a physical layer converter converting the data signal into a PLC frame signal, the data signal including the converted MAC address, and the PLC frame signal including a physical layer corresponding to the PLC protocol.

3. The PLC DSLAM of claim 1, wherein the transmission control unit converts the PLC frame signal into an analog signal and transmits the analog signal to the coupling device of the subscriber location via the telephone line.

4. A PLC coupling device installed in a subscriber location, comprising:

a telephone line port unit connecting with a predetermined telephone line and receiving a PLC frame signal from a predetermined PLC DSLAM connected via the telephone line;

a power line port unit connecting with at least one communication terminal, which is installed in the subscriber location, via a power line; and

a coupling control unit coupling the PLC frame signal with the power line and transmitting the PLC frame signal to the at least one communication terminal,

wherein the PLC DSLAM converts a data signal, which is received from a predetermined IP network, into a PLC frame signal corresponding to a predetermined PLC protocol, and transmits the PLC frame signal to the telephone line port unit via the telephone line.

5. The PLC coupling device of claim 4, wherein the coupling control unit performs impendence matching with respect to the received PLC frame signal in correspondence to a frequency band of the power line.

6. A PLC system comprising:

a PLC DSLAM converting a data signal, which is received from a predetermined IP network, into a PLC frame signal corresponding to a predetermined PLC protocol, and transmitting the PLC frame signal to at least one subscriber location that is connected via a predetermined telephone line, the telephone line being coupled with each of at least one telephone line that connects an exchange and at least one subscriber location; and

a PLC coupling device connecting with each of the telephone line and a predetermined power line, coupling the PLC frame signal, which is received via the telephone line, with the power line, and transmitting the PLC frame signal to at least one communication terminal that is installed in the subscriber location.

7. The PLC system of claim 6, wherein the PLC DSLAM comprises:

a first communication port unit connecting with the IP network and receiving the data signal via the IP network;

a second communication port unit connecting with the telephone line, the telephone line being coupled with each of at least one telephone line that connects an exchange and at least one subscriber location;

a PLC converter converting the data signal into the PLC frame signal corresponding to the predetermined PLC protocol; and

a transmission control unit controlling the PLC frame signal to be transmitted to a predetermined coupling device, which is installed in each of the at least one subscriber location, via the telephone line that connects with the second communication port unit.

8. The PLC system of claim 6, wherein the PLC coupling device comprises:

a telephone line port unit connecting with the telephone line and receiving a PLC frame signal from a predetermined PLC DSLAM that is connected via the telephone line;

a power line port unit connecting with at least one communication terminal, which is installed in the subscriber location, via a power line; and

a coupling control unit coupling the PLC frame signal with the power line and transmitting the PLC frame signal to the at least one communication terminal.