Abstract: A display apparatus, a server, and control methods thereof which enable a user to selectively use functions provided by the server and functions provided by the display apparatus through a unified UI. The display apparatus receives from a server UI information corresponding to a first function predetermined by a server from among a plurality of functions performable by a display apparatus, displays a first UI including a first item corresponding to the first function based on the received UI information and a second item corresponding to a second function added by the display apparatus from among the plurality of functions. If the second item is selected by input from a user, the display apparatus performs the second function corresponding to the second item.

Abstract: A method of distributing group identifiers IDs (GIDs) in a power line communication (PLC) network, a method of receiving the GIDs, an authentication apparatus, and a PLC apparatus are provided. The authentication apparatus includes: an authentication mode storing unit which stores an authentication mode having a value including one of an authentication authorized mode and an authentication unauthorized mode; a GID request receiver which receives a GID request message from a PLC apparatus; and a GID transmitter which, if the authentication mode is the authentication authorized mode, transmits a GID corresponding to the PLC apparatus to the PLC apparatus. Authentication is realized in a PLC media access control layer distributing the GIDs between a PLC apparatus and an authentication apparatus, so manually inputting a GID into the PLC apparatus is not necessary. Further, the GIDs are distributed via the authentication apparatus, thereby centrally managing the GIDs.

Abstract: A method and apparatus to efficiently transmit data. The method and apparatus effectively aggregate data and transmit the data in a high-speed power line communication (PLC) network. The method of transmitting the data includes combining each of at least one or more data units transferred from an upper layer, with a field to indicate attribute information of the data unit, dividing the combined data units and fields into frame blocks of an identical size, and aggregating the divided frame blocks and transferring the aggregated frame blocks as one frame to a PHY layer. In this way, data units of a variety of types and sizes transferred from the upper layer are aggregated and transmitted as the one frame.

Abstract: A method of transmitting data more effectively, and more particularly, a method of classifying service traffic, transmitting data according to the classifications of the service traffic, and performing a contention free slot (CFS) allocation in order to transmit data in a power line communication (PLC) network, and an apparatus to do the same. The data transmission method includes determining transmission priority of data according to service traffic characteristics, and transmitting data according to the determined transmission priority, thereby providing differentiated quality of service (QoS) according to service traffic characteristics.

Abstract: An apparatus and method of streaming content by adaptively selecting a peer-to-peer (P2P) method or a server-client method according to a network environment, and a computer readable medium having recorded thereon a program for executing the method are provided. The apparatus includes middleware which supports the P2P method, middleware which supports the server-client method, an adaptation manager which provides a list of content, determines one of at least one node and at least one server sharing content which is selected as a source device according to a content sharing method and their available bandwidths, and determines a content sharing method used by the source device as a streaming method, and an application unit which controls the selected content to be received from the source device by using middleware and a transfer layer corresponding to the determined streaming method, and the received content to be reproduced.

Abstract: A power line communication (PLC) method includes determining whether a destination communication apparatus to receive a data packet can directly communicate without using a repeater, transmitting the data packet to the destination communication apparatus when the destination communication apparatus can directly communicate without using the repeater, and transmitting the data packet to the repeater when the destination communication apparatus cannot directly communicate without using the repeater, and a power line communication (PLC) apparatus to perform the method.

Abstract: An electronic apparatus and a control method thereof, and an external apparatus and a control method thereof. The electronic apparatus includes a communication unit which communicates with an external apparatus, and a controller which performs an operation corresponding to a key signal received through the communication unit, receives a setup signal through the communication unit to reset up an operation corresponding to a first key signal, and performs a second operation based on a result of the reset up when the first key signal is received through the communication unit. The setup signal sets up the first operation corresponding to the first key signal to be replaced by the second operation different from the first operation.

Abstract: A method of joining a cell by using a proxy coordinator. The method of joining a cell by using a proxy coordinator includes requesting a second device to operate as a proxy coordinator from a first device positioned out of a beacon frame reachable area of the cell, transmitting a time period to operate as the proxy coordinator allocated by a coordinator of the cell, informing the first device that the second device can operate as the proxy coordinator, transmitting a cell join request to the proxy coordinator from the first device through the second device, and transmitting a beacon frame including time allocation information from the coordinator to the first device through the second device.

Abstract: A method of transmitting data more effectively, and more particularly, a method of transmitting data to a group comprising a plurality of reception stations that receive the same data from a transmission station when the stations communicate the data in a power line communication (PLC) network, and an apparatus to do the same. According to the method, a transmission station transmits data to a group including a plurality of reception stations that receive the same data at a time, to prevent a channel bandwidth from being wasted, and to prevent a station that does not desire to receive the data from receiving the data.

Abstract: Provided is an apparatus and method of displaying power line communication (PLC) channel information. The apparatus for displaying PLC channel information includes a channel information determining unit which performs channel estimation of a PLC channel, and, based on the channel estimation, determines channel information on the PLC channel including a bandwidth of the PLC channel which is available for a user in a PLC network; and a channel information displaying unit which displays the channel information to the user.

Abstract: A method of data communication between power line communication (PLC) stations belonging to different PLC cells includes transmitting a station ID of a PLC reception station to a PLC cell bridge (CB) of a first PLC cell to which a PLC transmission station belongs, receiving a group identification (GID) and an encryption key of a second PLC cell to which the PLC reception station belongs from the PLC CB of the first PLC cell, encrypting data to be transmitted using the encryption key of the second PLC cell, and transmitting the station ID of the PLC reception station, the GID of the second PLC cell, and the encrypted data, to the PLC CB of the first PLC cell, and an apparatus to perform the method.

Abstract: A method for providing a streaming service, a method for receiving a streaming service, a streaming service providing server, and a client device are provided. In a method for providing a streaming service, if a streaming service providing server receives a streaming service request for a second broadcasting channel from a second client while streaming multimedia content provided from a tuned first broadcasting channel to a first client, the streaming service providing server transmits a channel change notification message containing second broadcasting channel information to the first client. Accordingly, a user can recognize a change of channel by another user.

Abstract: A live content switching method, a source device, and a sink device are provided. The method includes switching from first content to second content by using a dummy connection, the second content using the same resource of the source device as the first content. Accordingly, by using dummy connections set between a source device and a sink device, it is possible to switch the sink device from one live content to another live content without the need to cut off existing connections set between the source device and the sink device.

Abstract: A method and apparatus to efficiently transmit data. The method and apparatus effectively aggregate data and transmit the data in a high-speed power line communication (PLC) network. The method of transmitting the data includes combining each of at least one or more data units transferred from an upper layer, with a field to indicate attribute information of the data unit, dividing the combined data units and fields into frame blocks of an identical size, and aggregating the divided frame blocks and transferring the aggregated frame blocks as one frame to a PHY layer. In this way, data units of a variety of types and sizes transferred from the upper layer are aggregated and transmitted as the one frame.

Abstract: A method of negotiating channel sharing between adjacent cells when there are a plurality of cells in a power line communication (PLC) network. The method includes attempting to negotiate the channel sharing during a minimum contention access period (CAP) which starts after a maximum beacon period ends and ends before a CAP of each PLC cell ends, wherein the maximum beacon period indicates a maximum size that a beacon frame in a super-frame transmitted from a coordinator of each PLC cell can have. When an attempt to negotiate the channel sharing is made using this method, interference does not occur during channel sharing negotiation, and effective channel sharing can be achieved, thereby eliminating interference between adjacent cells.

Abstract: A power line communication (PLC) network and method, in which a coordinator can be changed. The PLC network includes a coordinator and a standby coordinator. The coordinator performs scheduling coordination in a PLC cell and periodically transmits scheduling information about the scheduling coordination to stations in the PLC cell. The standby coordinator serves as the new coordinator instead of the coordinator when the coordinator does not operate for a predetermined amount of time.

Abstract: A method of joining a cell by using a proxy coordinator. The method of joining a cell by using a proxy coordinator includes requesting a second device to operate as a proxy coordinator from a first device positioned out of a beacon frame reachable area of the cell, transmitting a time period to operate as the proxy coordinator allocated by a coordinator of the cell, informing the first device that the second device can operate as the proxy coordinator, transmitting a cell join request to the proxy coordinator from the first device through the second device, and transmitting a beacon frame including time allocation information from the coordinator to the first device through the second device.

Abstract: A method of distributing group identifiers IDs (GIDs) in a power line communication (PLC) network, a method of receiving the GIDs, an authentication apparatus, and a PLC apparatus are provided. The authentication apparatus includes: an authentication mode storing unit which stores an authentication mode having a value including one of an authentication authorized mode and an authentication unauthorized mode; a GID request receiver which receives a GID request message from a PLC apparatus; and a GID transmitter which, if the authentication mode is the authentication authorized mode, transmits a GID corresponding to the PLC apparatus to the PLC apparatus. Authentication is realized in a PLC media access control layer distributing the GIDs between a PLC apparatus and an authentication apparatus, so manually inputting a GID into the PLC apparatus is not necessary. Further, the GIDs are distributed via the authentication apparatus, thereby centrally managing the GIDs.

Abstract: An apparatus and method of streaming content by adaptively selecting a peer-to-peer (P2P) method or a server-client method according to a network environment, and a computer readable medium having recorded thereon a program for executing the method are provided. The apparatus includes middleware which supports the P2P method, middleware which supports the server-client method, an adaptation manager which provides a list of content, determines one of at least one node and at least one server sharing content which is selected as a source device according to a content sharing method and their available bandwidths, and determines a content sharing method used by the source device as a streaming method, and an application unit which controls the selected content to be received from the source device by using middleware and a transfer layer corresponding to the determined streaming method, and the received content to be reproduced.

Abstract: A method of transmitting data more effectively, and more particularly, a method of transmitting data to a group comprising a plurality of reception stations that receive the same data from a transmission station when the stations communicate the data in a power line communication (PLC) network, and an apparatus to do the same. According to the method, a transmission station transmits data to a group including a plurality of reception stations that receive the same data at a time, to prevent a channel bandwidth from being wasted, and to prevent a station that does not desire to receive the data from receiving the data.