Abstract: The present invention relates to a multi-carrier resource utilization method and apparatus for power saving in a communication system using a multi-carrier, in which the activation of a secondary carrier for transmitting and receiving data traffic between a terminal and a base station is determined according to the QoS (Quality of Service) requirements such as a data traffic status between the terminal and the base station, a maximum sustained traffic rate, a maximum traffic burst size, or the like, and an indication message (Indication) indicating this is transferred to the terminal through a primary carrier to transmit and receive data traffic through the activated secondary carrier.

Abstract: Provided are a mode conversion method for client cooperation in a wireless communication system and a device thereof. A first device converts a second system repetitively into an active mode which can receive a signal and a non-active mode which cannot receive the signal based on mode conversion information, and detects at least one second device based on the second system in the active mode. The first device is connected to the base station through the second system and another first system.

Abstract: Provided are a method and an apparatus for confirming the validity of a candidate cooperative device list for client cooperation in a wireless communication system. A base station searches for at least one candidate cooperation device for a source device, then an effective period timer, for an effective time command list for a list of candidate cooperation devices for a source device, is initiated, and a determination is made as to whether the list of candidate cooperation devices is valid. The base station and the source device are connected through a first system, and the base station and one recommended candidate cooperation device selected from the list of candidate cooperation devices are connected through a second system.

Abstract: Disclosed herein is a method for preparing ultrathin silver nanowires. It may comprise (a) dissolving a silver salt (Ag salt) and a capping agent in a reducing solvent to give a mixture solution; (b) adding a halide compound to the mixture solution to yield a silver seed; (c) heating the mixture solution and then allowing the heated mixture solution to grow ultrathin silver nanowires from the silver seed under a pressure in an inert gas atmosphere; and (d) cooling the mixture solution in which the ultrathin silver nanowires have grown, followed by purification and separation to obtain the ultrathin silver nanowires. The silver nanowires are restrained from growing in thickness under a certain pressure, so that they are 30 nm or less in thickness and have a narrow diameter distribution, which leads to an improvement in aspect ratio.

Abstract: Provided is a method for machine to machine (M2M) communication. An M2M device acquires an M2M group identification (MGID) and an M2M zone identification. The M2M device checks whether or not the M2M device has escaped from the M2M group zone. If the M2M device has escaped from the M2M group zone, the M2M device transmits, to a base station, an update request message which requests that the M2M group identifier be updated. The M2M device receives, from the base station, a response message as a response to the update request message.

Abstract: Provided are a method and an apparatus for confirming the validity of a candidate cooperative device list for client cooperation in a wireless communication system. A base station searches for at least one candidate cooperation device for a source device, then an effective period timer, for an effective time command list for a list of candidate cooperation devices for a source device, is initiated, and a determination is made as to whether the list of candidate cooperation devices is valid. The base station and the source device are connected through a first system, and the base station and one recommended candidate cooperation device selected from the list of candidate cooperation devices are connected through a second system.

Abstract: The present invention relates to a method for updating secondary carrier information for preemptively allocating secondary carriers during handover and an apparatus for carrying out the method. A method in which a terminal performs handover in a broadband access system that supports multiple carriers according to one embodiment of the present invention comprises: a step in which a target base station receives, from a serving base station, a first message including carrier allocation information on at least one secondary carrier preemptively allocated to the terminal; a step of performing network reentry with the target base station; and judging whether the multi-carrier configuration of the serving base station and the multi-carrier configuration of the target base station are the same, and, if the configurations are different from each other, transmitting, to the target base station, a second message for requesting multi-carrier capability negotiation.

Abstract: A method for reducing handover interruption time in a mobile station is disclosed, in which a mobile station performs a ranging procedure using a dedicated ranging code previously allocated from a target base station. The dedicated ranging code allocated by the target base station may be provided through the serving base station, or may directly be provided from the target base station.

Abstract: The present invention relates to a wireless access system which supports multiple carriers, and disclosed is a method for coordinating the performance of the multiple carriers and an apparatus for supporting same. The method for coordinating the performance of the multiple carriers according to the present invention broadly consists of two steps. For example, the method comprises the steps of coordinating the basic performance of the multiple carriers in mobile user equipment and coordinating the extended performance of the multiple carriers in the mobile user equipment.

Abstract: Provided are a method and a device for transmitting data through client cooperation in a wireless communication system. A cooperative device of the client cooperation receives uplink (UL) data from a source device through a frame of a first system, and if the UL data is the data to be transmitted to a base station of the second system, transmits the UL data to the second system. In addition, when receiving downlink (DL) data from the base station of the second system, and the DL data is data to be transmitted to the source device, the DL data is transmitted to the source device through the frame of the first system.

Abstract: The present invention relates to a multi-carrier resource utilization method and apparatus for power saving in a communication system using a multi-carrier, in which the activation of a secondary carrier for transmitting and receiving data traffic between a terminal and a base station is determined according to the QoS (Quality of Service) requirements such as a data traffic status between the terminal and the base station, a maximum sustained traffic rate, a maximum traffic burst size, or the like, and an indication message (Indication) indicating this is transferred to the terminal through a primary carrier to transmit and receive data traffic through the activated secondary carrier.

Abstract: The present invention relates to a multi-carrier resource utilization method and apparatus for power saving in a communication system using a multi-carrier, in which the activation of a secondary carrier for transmitting and receiving data traffic between a terminal and a base station is determined according to the QoS (Quality of Service) requirements such as a data traffic status between the terminal and the base station, a maximum sustained traffic rate, a maximum traffic burst size, or the like, and an indication message (Indication) indicating this is transferred to the terminal through a primary carrier to transmit and receive data traffic through the activated secondary carrier.

Abstract: The present invention relates to a multi-carrier resource utilization method and apparatus for power saving in a communication system using a multi-carrier, in which the activation of a secondary carrier for transmitting and receiving data traffic between a terminal and a base station is determined according to the QoS (Quality of Service) requirements such as a data traffic status between the terminal and the base station, a maximum sustained traffic rate, a maximum traffic burst size, or the like, and an indication message (Indication) indicating this is transferred to the terminal through a primary carrier to transmit and receive data traffic through the activated secondary carrier.

Abstract: A method and apparatus for performing a carrier management in a broadband wireless communication system supporting multi-carriers are discussed. According to an embodiment, a method for a mobile station to perform a carrier management procedure with a base station supporting multiple carriers, includes receiving, by the mobile station from the base station, an instruction for a primary carrier change; transmitting, by the mobile station to the base station, an acknowledgement message indicating that the instruction is successfully received; and changing, at a specific time, a current primary carrier to one of the multiple carriers within the base station, wherein the specific time is determined based on the instruction.

Abstract: A method is described for transmitting signals in a mobile communication system which splits an information block into a plurality of split-information blocks and performs a hybrid automatic repeat request (HARQ) process upon each of the split-information blocks. A method is also described for reducing control information overhead by transmitting control information only through one control channel when splitting an information block and transmitting split-information blocks through a plurality of subframes or a plurality of resource blocks. The segmentation of the information block is performed in a physical layer to reduce medium access control (MAC) overhead and to simplify implementation.

Abstract: A method for data traffic offloading in a mobile communication system supporting a multi-radio access technology (RAT) and an apparatus using the method is provided. A mobile station receives information on a traffic load of a primary communication system from a base station. The mobile station determines whether to perform offloading to a secondary communication system on the basis of the traffic load of the primary communication system.

Abstract: The present invention relates to a multi-carrier resource utilization method and apparatus for power saving in a communication system using a multi-carrier, in which the activation of a secondary carrier for transmitting and receiving data traffic between a terminal and a base station is determined according to the QoS (Quality of Service) requirements such as a data traffic status between the terminal and the base station, a maximum sustained traffic rate, a maximum traffic burst size, or the like, and an indication message (Indication) indicating this is transferred to the terminal through a primary carrier to transmit and receive data traffic through the activated secondary carrier.

Abstract: The present invention relates to a broadband wireless access system, and more particularly, to a method in which a terminal acquires and updates global carrier configuration information of base stations in a network, and to an apparatus for performing the method.

Abstract: A method of transmitting a data block in a wireless communication system is provided. The method includes transmitting the data block, receiving hybrid automatic repeat request (HARQ) not-acknowledgement (NACK) for the data block, receiving an automatic repeat request (ARQ) feedback message indicating a reception state of the data block, and determining whether to retransmit the data block by using the ARQ feedback message.

Abstract: The present invention relates to a method and a device for managing carriers allocated to a terminal in a broadband wireless access system that supports multi-carrier. A method for managing carriers by a terminal in a broadband wireless access system supporting multi-carrier includes transmitting, to a base station, activation requests information for requesting the activation of at least one second carrier allocated from the base station through a first carrier according to the power state of the terminal, receiving, from the base station, a first message that includes activation indication information for indicating the activation of at least one target carrier of the at least one second carrier, and transmitting to the base station a second message which notifies the base station whether the at least one target carrier is ready per activation.