Abstract: Disclosed are a method and device for bidirectional communication in a wireless LAN. The method of a first STA comprises the steps of: receiving, from an AP, a first frame including an information element indicating TXOP sharing; confirming a shared TXOP duration on the basis of the first frame; and communicating with a second STA within the shared TXOP duration.

Abstract: A method and apparatus for NSTR communication in a communication system supporting multiple links are disclosed. A method for a first device comprises the steps of: if a first backoff operation has succeeded on a first link belonging to a first pair of NSTR links on which an STR operation of a second device is not supported, transmitting a first data frame to the second device on the first link; performing a second backoff operation for transmission of a second data frame on a second link belonging to the first pair of NSTR links; if the second backoff operation has succeeded on the second link, identifying whether or not a transmission operation of the second device is performed on the first link belonging to the pair of NSTR links; and transmitting the second data frame to the second device on the second link.

Abstract: A method and a device for direct communication in a communication system supporting multiple links are disclosed. A method of an AP MLD comprises the steps of: transmitting a trigger frame in multiple links including a first link and a second link; receiving a response frame for the trigger frame from a first STA associated with an STA MLD in the first link; receiving a first data frame from a third STA in the second link; and when a subject to receive the first data frame is a second STA associated with the STA MLD, transmitting a second data frame generated on the basis of the first data frame, to the first STA in the first link.

Abstract: A method and a device for shard communication in a wireless LAN are disclosed. A method of a first STA comprises the steps of: receiving a first frame for allocation of a shared communication period from an AP; identifying the shared communication period on the basis of one or more fields included in the first frame; and performing shared communication with a second STA in the shared communication period, wherein the shared communication period is configured within a TXOP configured between the AP and a third STA.

Abstract: The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound according to the present disclosure as an organic electroluminescent material, an organic electroluminescent device having long lifespan characteristics can be provided.

Abstract: A portable electronic device is provided. The portable electronic device includes a communication interface, a memory configured to store multimedia data obtained through at least one camera operatively connected with the memory, and a processor. The processor is configured to transmit at least part of the multimedia data to an external electronic device through a network using a first transmit power function of the portable electronic device, through the communication interface, to determine context information associated with at least one of the portable electronic device and the network, and to change from the first transmit power function to a second transmit power function of the portable electronic device if the context information corresponds to a condition.

Abstract: A portable electronic device is provided. The portable electronic device includes a communication interface, a memory configured to store multimedia data obtained through at least one camera operatively connected with the memory, and a processor. The processor is configured to transmit at least part of the multimedia data to an external electronic device through a network using a first transmit power function of the portable electronic device, through the communication interface, to determine context information associated with at least one of the portable electronic device and the network, and to change from the first transmit power function to a second transmit power function of the portable electronic device if the context information corresponds to a condition.

Abstract: Methods and apparatus are provided for transmitting and receiving multimedia contents. A transmission characteristic relating to a section, from among a plurality of sections for transmitting data, where an initial transmission speed is high, is provided from a server. The multimedia contents are requested in consideration of the transmission characteristic. The multimedia contents are received from the server.

Abstract: An apparatus and method for driving an image display apparatus are disclosed. The apparatus includes a display panel having a plurality of pixels, for displaying an image, a panel driver for driving the pixels of the display panel, an image data converter for detecting a smooth region, an edge region, and a detail region from externally input image data in units of at least one frame and generating converted image data by changing a gray scale or chrominance of the image data at different rates in the smooth region, the edge region and the detail region, and a timing controller for arranging the converted image data suitably for driving of the display panel, providing the arranged image data to the panel driver, and controlling the panel driver by generating a panel control signal.

Abstract: Provided are a multimedia data reproducing method and an apparatus for controlling a multimedia data reproducing speed based on a multimedia data packet receiving speed. The method including controlling a reproducing speed of the multimedia data based on a first time difference between times at which a plurality of packets including the multimedia data are respectively received and a second time difference between times to respectively reproduce the multimedia data corresponding to the plurality of packets; and reproducing the multimedia data at the controlled reproducing speed.

Abstract: Methods and apparatus are provided for transmitting and receiving multimedia contents. A transmission characteristic relating to a section, from among a plurality of sections for transmitting data, where an initial transmission speed is high, is provided from a server. The multimedia contents are requested in consideration of the transmission characteristic. The multimedia contents are received from the server.

Abstract: The moonpool includes a first space formed by being penetrated from a bottom surface through an upper deck of the drillship so as to carry out a drilling operation; and a second space formed on a side of the first space in a lengthwise direction of the drillship, a bottom of the second space being open toward a lower side of the drillship. The second space is formed on a side of the first space in the lengthwise direction of the drillship so that the overall length of the moonpool is increased.

Abstract: An apparatus and method for driving an image display apparatus are disclosed. The apparatus includes a display panel having a plurality of pixels, for displaying an image, a panel driver for driving the pixels of the display panel, an image data converter for detecting a smooth region, an edge region, and a detail region from externally input image data in units of at least one frame and generating converted image data by changing a gray scale or chrominance of the image data at different rates in the smooth region, the edge region and the detail region, and a timing controller for arranging the converted image data suitably for driving of the display panel, providing the arranged image data to the panel driver, and controlling the panel driver by generating a panel control signal.

Abstract: The moonpool includes: a first space formed by being penetrated from a bottom surface through an upper deck of the drillship so as to carry out a drilling operation; and a second space formed on a side of the first space in a lengthwise direction of the drillship, a bottom of the second space being open toward a lower side of the drillship. The second space is formed on a side of the first space in the lengthwise direction of the drillship so that the overall length of the moonpool is increased.

Abstract: Provided are a multimedia data reproducing method and an apparatus for controlling a multimedia data reproducing speed based on a multimedia data packet receiving speed. The method including controlling a reproducing speed of the multimedia data based on a first time difference between times at which a plurality of packets including the multimedia data are respectively received and a second time difference between times to respectively reproduce the multimedia data corresponding to the plurality of packets; and reproducing the multimedia data at the controlled reproducing speed.

Abstract: A Dynamic bandwidth allocation method using OLT (Optical Line Terminal) and ONU (Optical Network Unit) for use in GE-PON (Gigabit Ethernet Passive Optical Network) system is disclosed. The OLT's scheduler performs scheduling upon receiving multiple-queue request information contained in the REPORT message from the ONU, and transmits a combined scheduling result associated with one ONU using a GATE message. An ONU's scheduler performs scheduling upon receiving a bandwidth allocated by the OLT, and allocates a transfer bandwidth to its own queues.

Abstract: A method of controlling a loop-back process between a local device and a remote device in an Ethernet passive optical network simplifies the initiation and the termination processes for a loop-back process by avoiding the use of Operation, Administration and Maintenance—Packet Data Unit (OAM PDU) information along with a loop-back control OAM PDU. The method includes the steps of: (a) adding a predetermined field into a loop-back control OAM PDU in the loop-back process, the predetermined field having distinguishing messages for initiation of a loop-back process and messages for termination of a loop-back process; and (b) the local device and the remote device performing a loop-back process using the loop-back control OAM PDU.

Abstract: A Gigabit Ethernet-based passive optical network that can reliably transmit data is disclosed. The network includes an OLT for receiving a public key through a transmission medium, encrypting a secret key by means of the received public key, transmitting the encrypted secret key, encrypting data by means of the secret key, and transmitting the encrypted data, the OLT being located in a service provider-side. The network also includes an ONT for transmitting the public key to the OLT, receiving the secret key transmitted from the OLT, decrypting the secret key by means of a private key, receiving the data, and decrypting the received data by means of the decrypted the secret key. The public key is used for encrypting the secret key. The secret key is encrypted by means of the public key. The data is encrypted by the OLT by means of the secret key.

Abstract: Disclosed is a upstream data transmission method in a gigabit Ethernet-passive optical network (GE-PON) system. In the GE-PON system including an optical line termination having a scheduler and optical network units connected to the optical line termination, the optical line termination receives bandwidth allocation request signals from the optical network units at a start of a first cycle, allocates transmission bandwidths to the respective optical network units in accordance with the bandwidth allocation request signals, and transmits the allocated transmission bandwidths to the respective optical network units before a second cycle that follows the first cycle.

Abstract: An OAM capability discovery method in Ethernet passive optical network is disclosed. An OLT assigns identifications according to a registration request of the plurality of ONUs connected to the OLT. In response, the OLT transmits an OAM capability information message of the OLT to a random ONU from among the registered plurality of ONUs, and the random ONU transmits an OAM capability information message of the random ONU to the OLT, then finally the OLT transmits an OAM capability discovery completion message to ONU.