Abstract: In the present invention, by providing a device for determining a state of an optical network terminal line including: an optical signal transfer interface configured to transfer a downlink signal transmitted from an optical line terminal to an optical network terminal line and to transfer an uplink signal transmitted from an optical network terminal connected to the optical network terminal line to the optical line terminal; an optical signal transmitter configured to transmit an optical signal to the optical signal transfer interface; an optical signal receiver configured to receive the downlink signal through the optical signal transfer interface, to receive a reflected signal corresponding to the optical signal, and to detect intensity of the downlink signal and the reflected signal; a signal converter configured to convert the reflected signal from an analog form to a digital form; a signal processor configured to analyze the reflected signal of a digital form and to determine the state of the optical ne

Abstract: A terminal status monitoring apparatus connected to a terminal at an optical subscriber side in an optical network is provided. A signal transferring unit transfers a downlink optical signal to the terminal and receives, as a reflected optical signal, the downlink optical signal which is reflected at the terminal. A signal receiving unit measures an intensity of the reflected optical signal. A signal processing unit determines a connection status of a terminal device at the terminal by comparing an intensity of the downlink optical signal with the intensity of the reflected optical signal. A signal output unit outputs the connection status.

Abstract: A terminal status monitoring apparatus connected to a terminal at an optical subscriber side in an optical network is provided. A signal transferring unit transfers a downlink optical signal to the terminal and receives, as a reflected optical signal, the downlink optical signal which is reflected at the terminal. A signal receiving unit measures an intensity of the reflected optical signal. A signal processing unit determines a connection status of a terminal device at the terminal by comparing an intensity of the downlink optical signal with the intensity of the reflected optical signal. A signal output unit outputs the connection status.

Abstract: Provided is an optical distribution network (ODN) including an optical cable and an optical node, and more particularly, an optical distribution network including an optical cable and an optical node, wherein the optical node is implemented to acquire and analyze information regarding the optical cable through an optical connector included in the optical cable, and an operating method thereof. The ODN includes an optical cable and an optical node connectable to the optical cable, wherein the optical cable has an optical connector capable of being joined to the optical node, and the optical connector has an electronic tag configured to store identification information of the optical cable and a first connection pin configured to electrically connect the electronic tag and the optical node.

Abstract: Provided are an electronic device, a smart label, and an optical network management apparatus using the same. The optical network management apparatus includes one or more smart labels respectively equipped in ports and cables to work and a terminal device configured to transmit control signals, which control smart labels respectively equipped in a port and a cable to work among the one or more smart labels, to smart labels respectively equipped in the port and the cable to work.

Abstract: Provided are an apparatus and method for controlling program conversion according to program protection information. The method for controlling conversion of a broadcasting program includes: demultiplexing a broadcasting program into broadcasting program data and program protection information; encrypting the broadcasting program data based on distribution condition of the program protection information when recordation of the broadcasting program data is requested; and recording the encrypted broadcasting program data.

Abstract: A terminal for reproducing a digital content in support of transmitting/receiving the digital content to/from another terminal based on whether a terminal is registered in a domain and whether a terminal belongs to a person use scope such that the terminal belonging to the person use scope is not registered in the domain.

Abstract: Disclosed is a broadcasting signal receiving apparatus for controlling use of a broadcasting program using a signature in program information and a method thereof. The broadcasting signal receiving apparatus includes a communicating unit for receiving a broadcasting signal, an extracting unit for extracting a broadcasting program and program information from the received broadcasting signal, and a determining unit configured to generate a temporal signature for confirmation (confirmation signature) which determines whether the program information is changed or not from the original program information and determine validity of the program information by comparing a signature included in the extracted program information with the confirmation signature.

Abstract: A system for authenticating personal use of contents by using a portable storage medium includes: a portable personal use authentication device configured to store domain authentication information; and a contents personal use authentication apparatus configured to extract playback information for playing a provided content based on the domain authentication information and provide the extracted playback information to a player.

Abstract: Disclosed herein is a circularly polarized antenna with a wide beam width, in which four U-shaped metal strips are disposed in a circular shape, and four signals having the same magnitude and phase difference intervals of 90 degrees are fed to the respective metal strips so as to transceive circularly polarized waves. The disclosed circularly polarized antenna includes a ground plane, a central patch formed in the center of an upper surface of the ground plane, and a plurality of radiation patches disposed above the ground plane and around the central patch in a circular shape, wherein signals having the same magnitude and preset phase differences are fed to respective radiation patches.

Abstract: Provided are an apparatus and method for controlling program conversion according to program protection information. The method for controlling conversion of a broadcasting program includes: demultiplexing a broadcasting program into broadcasting program data and program protection information; encrypting the broadcasting program data based on distribution condition of the program protection information when recordation of the broadcasting program data is requested; and recording the encrypted broadcasting program data.

Abstract: A system and method for concurrently performing a group communication and a one-to-one communication in a wireless Internet Protocol (IP) network are disclosed. The method includes requesting, upon receipt of a one-to-one communication request from another terminal during a voice group communication, a concurrent mode service to the server by a compound terminal, determining, upon receipt of a group communication IP packet, whether there is a concurrent mode user among group members to receive a voice data packet corresponding to the group communication IP packet by a server, converting the group communication IP packet to a text data packet in the presence of a concurrent mode user by the server, transmitting the text data packet to the concurrent mode user by the server, and transmitting the voice data packet corresponding to the group communication IP packet to group communication mode users except for the concurrent mode user by the server.

Abstract: A terminal for reproducing a digital content in support of transmitting/receiving the digital content to/from another terminal includes: an encryption unit configured to encrypt the digital content to produce encrypted digital content; a use scope determining unit configured to determine a use scope of a target terminal to which the digital content is to be transmitted; a personal-use authentication information generation unit configured to transform encryption information of the digital content according to a determination result of the use scope determining unit and generate personal-use authentication information; and a communication unit configured to transmit the encrypted digital content and the personal-use authentication information to the target terminal.

Abstract: Disclosed is a method and system for storing encryption key information and package key information for decrypting encrypted broadcasting programs to store broadcasting programs. The method for protecting broadcasting programs includes generating and storing information about a first encryption key for encrypting broadcasting programs, and generating package key information by encrypting the first encryption key using a second encryption key.

Abstract: Disclosed are a master terminal capable of registering and managing terminals that belong to a personal use scope, which will be referred to as personally used terminals or personal use terminals, hereafter, and a method and system for managing personal use terminals by using the master terminal. The method for managing a personal use group using a first master terminal to register and manage terminals belonging to a personal use scope includes: requesting a second master terminal that belongs to the personal use scope for personal use group information; receiving the personal use group information from the second master terminal; and registering a terminal that belongs to the personal use scope as the personal use group based on the received personal use group information.

Abstract: Disclosed is a broadcasting signal receiving apparatus for controlling use of a broadcasting program using a signature in program information and a method thereof. The broadcasting signal receiving apparatus includes a communicating unit for receiving a broadcasting signal, an extracting unit for extracting a broadcasting program and program information from the received broadcasting signal, and a determining unit configured to generate a temporal signature for confirmation (confirmation signature) which determines whether the program information is changed or not from the original program information and determine validity of the program information by comparing a signature included in the extracted program information with the confirmation signature.

Abstract: A system for authenticating personal use of contents by using a portable storage medium includes: a portable personal use authentication device configured to store domain authentication information; and a contents personal use authentication apparatus configured to extract playback information for playing a provided content based on the domain authentication information and provide the extracted playback information to a player

Abstract: Provided is a method and apparatus for transmitting/receiving broadcasting program ID for identifying a broadcasting program along with a broadcasting program. The method for transmitting a broadcasting program, includes: acquiring audio/video bitstream for at least one broadcasting program; acquiring a broadcasting program identification (ID) corresponding to the broadcasting program; generating a media file including the audio/video bitstream and metadata; and transmitting the media file, wherein the metadata includes the broadcasting program ID and reference information for the audio/video bitstream.

Abstract: This research discloses a digital broadcasting contents transmitting/receiving apparatus that can quickly and easily purchase broadcasting contents, and a method thereof. The apparatus for receiving a digital broadcasting includes: a broadcasting contents receiver configured to receive a broadcasting content and first program protection information (PPI) including distribution scope information of the broadcasting content; a content storage configured to store the received broadcasting content; a purchase requester configured to transmit purchase request information according to a purchase request of a user for the stored broadcasting content; and a PPI controller configured to replace the first PPI with second PPI transmitted to the broadcasting contents receiver in response to the purchase request and including information on a changed distribution scope of the broadcasting content for which the purchase request is made.

Abstract: Provided are a system and a method for providing contents using an open API. A contents storing unit stores at least one contents. An open API unit is common to upper applications on the basis of a wired network interface and provides an API that is a communication function realized as components. A communication capability providing unit combines the API with the contents selected by the contents provider, and adds a communication function to the contents on the basis of usable network resources. The contents providing unit provides contents in which a communication function is added.