Abstract: An elevator security procedure is performed according to a security level of an elevator of a building including a plurality of residence units through an elevator security system. The elevator security system includes home gateways respectively installed at the plurality of residence units and a server coupled to the home gateways. The server may analyze a comparison result of passenger information of passengers in the elevator and member information of members of residence units associated with floors selected by the passengers in the elevator. The server may determine a security level of the elevator based on the analysis result. The server may perform a security procedure designated for the determined security level by controlling at least one of constituent elements of the elevator and smart devices coupled to the at least one of home gateways.

Abstract: Provided is a method of providing an integrate cloud storage service through a home gateway communicating with smart devices through a first network formed by the home gateway and communicating with cloud storages through a communication network. The method may include obtaining information on cloud storage accounts associated with a smart device, as cloud storage account information, upon generation of a predetermined event associated with the smart device, generating an integrated cloud storage list based on information on folders and data of cloud storages accessible by the cloud storage account information, and providing the generated integrated cloud storage list to the smart device.

Abstract: Provided is a method of providing an integrate cloud storage service through a home gateway communicating with smart devices through a first network formed by the home gateway and communicating with cloud storages through a communication network. The method may include obtaining information on cloud storage accounts associated with a smart device, as cloud storage account information, upon generation of a predetermined event associated with the smart device, generating an integrated cloud storage list based on information on folders and data of cloud storages accessible by the cloud storage account information, and providing the generated integrated cloud storage list to the smart device.

Abstract: The disclosure is related to an elevator security procedure performed according to a security level of an elevator of a building including a plurality of residence units through an elevator security system including home gateways respectively installed at the plurality of residence units and a server coupled to the home gateways. The server may analyze a comparison result of passenger information of passengers in the elevator and member information of members of residence units associated with floors selected by the passengers in the elevator. The server may determine a security level of the elevator based on the analysis result. The server may perform a security procedure designated for the determined security level by controlling at least one of constituent elements of the elevator and smart devices coupled to the at least one of home gateways.

Abstract: An method for providing an image to a multiple number of devices is disclosed. The method includes providing a part of the image to a first device, receiving, from a second device, second position information of the second device relative to first position information of the first device, and providing, to the second device, another part of the image corresponding to the position information of the second device.

Abstract: An apparatus for providing an interface customized to contents among a plurality of contents is disclosed. The apparatus includes a contents provider configured to receive, from a first device, user information of the first device and a content request signal that requests the contents among the plurality of contents, and provide the requested contents to the first device based on the received user information of the first device, an interface request receiver configured to receive, from a second device, user information of the second device and an interface request signal that requests interface data, and an interface data provider configured to authenticate the second device by using both the user information of the first device and the user information of the second device, and provide interface data corresponding to the provided contents to the second device if the second device is authenticated.

Abstract: Provided are an apparatus and method for tracking a wavelength in a passive optical subscriber network in which a central base station and at least one subscriber terminal are connected via a remote node. The apparatus includes a first wavelength aligning unit multiplexing and aligning wavelengths of optical signals from a plurality of single-mode optical sources of the central base station; a second wavelength aligning unit multiplexing and aligning wavelengths of optical signals transmitted to the remote node from a plurality of single-mode optical sources of the subscriber terminal; and a third wavelength aligning unit demultiplexing and aligning wavelengths of optical signals from the second wavelength aligning unit, the third wavelength aligning unit being included in the central base station.

Abstract: A communication recovering system for a wavelength division multiplexed passive optical network (WDM PON) includes a central office and remote nodes. When there is a fault in an optical fiber connecting a first blue/red band coupler to a blue/red band coupler R11, optical signals are inputted/outputted thereto/therefrom through a first 1×2 optical switch and a second blue/red band coupler, and when there is a fault in an optical fiber connecting the second blue/red band coupler to a blue/red band coupler R21, optical signals are inputted/outputted thereto/therefrom through the second 1×2 optical switch and the first blue/red band coupler.

Abstract: An optical fiber, and an optical access network, a local area network and optical parts for communication, which uses the optical fiber, are disclosed. The optical fiber whose core diameter is 10 ?m˜40 ?m has at least two propagation modes in a wavelength over 1200 nm. The optical fiber according to the present invention can reduce packaging costs for optical components, since cross-sectional area of the core is large, compared with the prior art technique adopting a single mode optical fiber, and can transmit ultra-high speed data a relatively long distance, since the mode number and modal dispersion effect of the optical fiber is relatively small, compared with the prior art multimode optical fiber. Also, when using the optical fiber according to the present invention, the optical subscriber network and the local area network can be cost-effectively implemented.

Abstract: A communication recovering system for a wavelength division multiplexed passive optical network (WDM PON). The communication recovering system can recover fault of optical fibers between the central office and the remote nodes without additional optical fibers by grouping two remote nodes and employing an AWG having periodic transmission characteristics, and can also simply and rapidly recover such a fault with minimal optical loss using an AWG of 2×N structure and an On-Off optical switch, although protection optical fibers are additionally installed therein. The system can rapidly recover fault of optical fibers between a local office and optical network units, 1:N manner, using 2×2 optical switches, which are installed to each of the optical network units, a reserved transmitter and receiver, and a transceiver.

Abstract: A communication recovering system for a wavelength division multiplexed passive optical network (WDM PON). The communication recovering system can recover fault of optical fibers between the central office and the remote nodes without additional optical fibers by grouping two remote nodes and employing AWGs having periodic transmission characteristics, and can also simply and rapidly recover such a fault with minimal optical loss using 1×N structure of the AWGs and On-Off optical switches, although protection optical fibers are additionally installed therein. The communication recovering system has advantages in that it can simplify network structure, be cost-effectively implemented, reduce optical loss, and rapidly perform protection of optical fiber fault.

Abstract: A fault localization apparatus for an optical line in a wavelength division multiplexed passive optical network is disclosed. The apparatus can detect light loss and fault positions as a channel exhibiting an abnormal receiving state of signals received by each of the upstream receivers is checked, and a monitoring optical signal is used, in which the monitoring optical signal is generated as a pulse is inputted to a light source of the downstream transmitter corresponding to the channel showing such an abnormal receiving state. The apparatus according to the present invention can detect fault positions of optical lines between the central office and the remote nodes and between the remote nodes and the optical network units, since the light source of downstream channel in which faults occur is used as a monitoring light source. The apparatus according to the present invention can be cost-effectively implemented.

Abstract: An optical fiber, and an optical access network, a local area network and optical parts for communication, which uses the optical fiber, are disclosed. The optical fiber whose core diameter is 10 ?m˜40 ?m has at least two propagation modes in a wavelength over 1200 nm. The optical fiber according to the present invention can reduce packaging costs for optical components, since cross-sectional area of the core is large, compared with the prior art technique adopting a single mode optical fiber, and can transmit ultra-high speed data a relatively long distance, since the mode number and modal dispersion effect of the optical fiber is relatively small, compared with the prior art multimode optical fiber. Also, when using the optical fiber according to the present invention, the optical subscriber network and the local area network can be cost-effectively implemented.