Abstract: A DLNA device for performing a DLNA service scenario, comprises a display unit, an input unit, a communicator and a controller. The display unit is configured to display a user interface for performing the DLNA service scenario. The input unit is configured to receive, from a user, an operational instruction for the user interface. The communicator is configured to communicate with a DLNA network. The controller is configured to control the user interface displayed on the display unit and control the communicator. The user interface is configured to include a main layer providing an interface for media content selection, a first sublayer providing an interface for media server selection, and a second sublayer providing an interface for media player selection. The first sublayer and the second sublayer are displayed temporarily on at least a portion of the main layer according to the operational instruction.

Abstract: A DLNA device for sharing multiple home media content comprises a display unit, an input unit, a communicator, a controller and a data storage unit. The display unit is configured to display a user interface for implementing at least one individual DLNA service scenario. The input unit is configured to receive a DLNA service scenario selection information including server selection information, content selection information and player selection information through the user interface. The communicator configured to communicate with a DLNA network. The controller is configured to perform the at least one individual DLNA service scenario based on the DLNA service scenario selection information received through the input unit. The data storage unit configured to store scenario selection information, uniform resource identifier (URI) information of a content and playback state information corresponding to each individual DLNA service scenario.

Abstract: A DLNA device for sharing multiple home media content comprises a display unit, an input unit, a communicator, a controller and a data storage unit. The display unit is configured to display a user interface for implementing at least one individual DLNA service scenario. The input unit is configured to receive a DLNA service scenario selection information including server selection information, content selection information and player selection information through the user interface. The communicator configured to communicate with a DLNA network. The controller is configured to perform the at least one individual DLNA service scenario based on the DLNA service scenario selection information received through the input unit. The data storage unit configured to store scenario selection information, uniform resource identifier (URI) information of a content and playback state information corresponding to each individual DLNA service scenario.

Abstract: A DLNA device for performing a DLNA service scenario, comprises a display unit, an input unit, a communicator and a controller. The display unit is configured to display a user interface for performing the DLNA service scenario. The input unit is configured to receive, from a user, an operational instruction for the user interface. The communicator is configured to communicate with a DLNA network. The controller is configured to control the user interface displayed on the display unit and control the communicator. The user interface is configured to include a main layer providing an interface for media content selection, a first sublayer providing an interface for media server selection, and a second sublayer providing an interface for media player selection. The first sublayer and the second sublayer are displayed temporarily on at least a portion of the main layer according to the operational instruction.

Abstract: The invention relates to a data transfer method in a multi-hop relay system. The data transfer method comprises: a step for allowing a base station to receive from a first terminal the channel information (Hd,1) between the base station and the first mobile station, a step for making the base station generate an interference cancellation precoding matrix using Hd,1, a step for forcing the base station to transfer first data to a relay station, and a step for making the relay station transfer the first data to the first mobile station and forcing the base station to transfer second data to a second mobile station, wherein the second data is converted using the interference cancellation precoding matrix. According to the disclosed data transfer method in the multi-hope relay system, the base station transfers data to another mobile station efficiently when the relay station transfers data to a mobile station.

Abstract: The present invention relates to a method for changing a preamble in a moving network system, and a system for same. The method comprises the steps of: enabling a base station to select a relay, to change a preamble thereof from at least two relays using a first preamble; enabling the selected relay to alternately transmit a signal using the first preamble and a signal using a second preamble to at least one terminal controlled by the selected relay; enabling the selected relay to judge whether the preamble of said at least one terminal is completely changed; and enabling the selected relay to transmit only the signal using the second preamble to said at least one terminal if the preamble is completely changed.

Abstract: Disclosed is a method and system for transmitting and receiving data in a communication system. The system includes a base station, and a relay station connecting the base station with at least one mobile station. The base station transmits data for a plurality of mobile stations to the relay station, and transmits the data to at least one mobile station belonging to the base station from among the plurality of mobile stations. The relay station receives the data from the base station, and transmits the data to at least one mobile station belonging to the relay station from among the plurality of mobile stations in the same interval as an interval where the base station transmits the data to the mobile station.

Abstract: An apparatus and method for transmitting/receiving a Channel Quality Information (CQI) in a communication system are provided. A Mobile Station (MS) receives first information indicating a representative MS selected from a group of MSs located within a preset range and in similar channel statuses, the group including the MS, determines from the first information whether the MS is designated as the representative MS, and transmits a CQI of the MS as a representative CQI of the MSs included in the group to a Base Station (BS), if the MS is designated as the representative MS.

Abstract: A method and apparatus for notifying status of an MN in a WLAN system using VLC are provided, in which an AP allocates a first predetermined number of time slots per frame as unallocated slots, for status notification of an initially accessing MN and allocates a second predetermined number of time slots per frame as reserved slots, for status notification of an initially accessing MN and uplink data transmission of an MN, and the MN transmits a visible light signal carrying status information about the MN in one of an unallocated slot and a reserved slot, if the MN initially accesses the AP.

Abstract: A technique for managing a packet to be transmitted to a Mobile Station (MS) that performs Relay Station (RS) handover in a multi-hop relay Broadband Wireless Access (BWA) system is provided. In the BWA system, a Base Station (BS) includes a controller for determining whether to perform activecasting on an MS upon receiving an activecast request message; a scheduler for allocating a resource by taking into consideration a channel condition between the MS and a serving RS when activecasting is determined to be performed; and a transmitter for multicasting a packet, which is to be transmitted to the MS, to a target RS and the serving RS by using the allocated resource.

Abstract: A method for retransmitting data when data transmission/reception has failed in a wireless LAN system using visible light communication. A mobile node searches a received frame for a fast feedback slot allocated for retransmission information when momentary data transmission/reception failure has occurred. One mini-slot from among the plurality of mini-slots is selected from the fast feedback slot. The mobile node transmits a fast feedback message, including information for retransmission, to an access point by using the selected mini-slot.

Abstract: Disclosed is a system and method for transmitting data based on an operational state of a mobile station in a communication system. The method includes, when detecting a low battery state of the mobile station, storing one or more data packets to be transmitted to the mobile station, extracting at least one data packet, which has a transmission delay time larger than a difference between a maximum delay time and preset margin, from the one or more stored data packets, and transmitting at least a part of the extracted at least one data packet to the mobile station by using a resource allocated to the mobile station.

Abstract: The invention relates to a data transfer method in a multi-hop relay system. The data transfer method comprises: a step for allowing a base station to receive from a first terminal the channel information (Hd,1) between the base station and the first mobile station, a step for making the base station generate an interference cancellation precoding matrix using Hd,1, a step for forcing the base station to transfer first data to a relay station, and a step for making the relay station transfer the first data to the first mobile station and forcing the base station to transfer second data to a second mobile station, wherein the second data is converted using the interference cancellation precoding matrix. According to the disclosed data transfer method in the multi-hope relay system, the base station transfers data to another mobile station efficiently when the relay station transfers data to a mobile station.

Abstract: The present invention relates to a method for changing a preamble in a moving network system, and a system for same. The method comprises the steps of: enabling a base station to select a relay, to change a preamble thereof from at least two relays using a first preamble; enabling the selected relay to alternately transmit a signal using the first preamble and a signal using a second preamble to at least one terminal controlled by the selected relay; enabling the selected relay to judge whether the preamble of said at least one terminal is completely changed; and enabling the selected relay to transmit only the signal using the second preamble to said at least one terminal if the preamble is completely changed.

Abstract: A method for retransmitting data when data transmission/reception has failed in a wireless LAN system using visible light communication. A mobile node searches a received frame for a fast feedback slot allocated for retransmission information when momentary data transmission/reception failure has occurred. One mini-slot from among the plurality of mini-slots is selected from the fast feedback slot. The mobile node transmits a fast feedback message, including information for retransmission, to an access point by using the selected mini-slot.

Abstract: A method and apparatus for notifying status of an MN in a WLAN system using VLC are provided, in which an AP allocates a first predetermined number of time slots per frame as unallocated slots, for status notification of an initially accessing MN and allocates a second predetermined number of time slots per frame as reserved slots, for status notification of an initially accessing MN and uplink data transmission of an MN, and the MN transmits a visible light signal carrying status information about the MN in one of an unallocated slot and a reserved slot, if the MN initially accesses the AP.

Abstract: Disclosed is a system and method for transmitting data based on an operational state of a mobile station in a communication system. The method includes, when detecting a low battery state of the mobile station, storing one or more data packets to be transmitted to the mobile station, extracting at least one data packet, which has a transmission delay time larger than a difference between a maximum delay time and preset margin, from the one or more stored data packets, and transmitting at least a part of the extracted at least one data packet to the mobile station by using a resource allocated to the mobile station.

Abstract: Disclosed is a method and system for transmitting and receiving data in a communication system. The system includes a base station, and a relay station connecting the base station with at least one mobile station. The base station transmits data for a plurality of mobile stations to the relay station, and transmits the data to at least one mobile station belonging to the base station from among the plurality of mobile stations. The relay station receives the data from the base station, and transmits the data to at least one mobile station belonging to the relay station from among the plurality of mobile stations in the same interval as an interval where the base station transmits the data to the mobile station.

Abstract: An apparatus and method for transmitting/receiving a Channel Quality Information (CQI) in a communication system are provided. A Mobile Station (MS) receives first information indicating a representative MS selected from a group of MSs located within a preset range and in similar channel statuses, the group including the MS, determines from the first information whether the MS is designated as the representative MS, and transmits a CQI of the MS as a representative CQI of the MSs included in the group to a Base Station (BS), if the MS is designated as the representative MS.

Abstract: An apparatus and method for performing effective Automatic Repeat reQuest (ARQ) in a multi-hop relay system is provided. The method includes the steps of determining whether a Mobile Station (MS) enters a handover region; if it is determined that the MS enters the handover region, transmitting an E2E-ARQ-Request message, which provides a notification that an End-to-End (E2E) ARQ method has begun to be used, to at least one of a Relay Station (RS) and the MS, transmitting to the RS an ARQ block to be transmitted to the MS, and storing the ARQ block in a queue; and if an Acknowledgement (ACK) for the ARQ block is received from the RS and if an E2E ACK which provides a notification that the MS has received the ARQ block is received from the at least one of the RS and the MS, discarding the ARQ block from the queue. Thus, excellent throughput and Media Access Control (MAC) efficiency can be obtained.