Abstract: A phase change memory device including a multi-level cell and a method of manufacturing the same are provided. The device includes a first phase-change material layer to which a current is provided from a heating electrode, and a second phase-change material layer formed with continuity to the first phase-change material layer and having a different width from the first phase-change material layer, and to which a current is provided from a heating electrode.

Abstract: A method for supporting coexistence with a wireless personal area network (WPAN) is provided. A method for supporting coexistence with a WPAN in a mobile station which periodically receives a beacon signal for local wireless communication includes, at the mobile station, calculating the numbers of uplink frames which overlap with the beacon signal, configuring a bitmap using the calculated frame numbers, and transmitting coexistence information including the bitmap to a base station. Accordingly, when a broadband wireless access system and WiMedia or ZigBee are simultaneously used, a beacon signal of WiMedia or ZigBee can be efficiently protected from the interruption of the broadband wireless access system and thus WiMedia or ZigBee can be normally operated.

Abstract: A method of communicating with short range wireless devices using a mobile terminal includes selectably communicating with a plurality of portable wireless devices to support at least one operating mode. The mobile terminal includes a short range communication module configured to be connected to and communicate with a plurality of paired short range portable wireless devices, an input unit for recognizing an external input received to configure the mobile terminal to support at least one operating mode with at least one portable wireless device, and a controller configured to support the at least one operating mode with the at least one portable wireless device, the controller controlling the short range communication module such that the short range communication module selectively communicates with the plurality of portable wireless devices to support a first operating mode.

Abstract: A feedback method for interference alignment in wireless network having K transmitters and K receivers is provides. The method comprising: transmitting, performed by transmitter n?1, a precoding vector of transmitter n?1 (n is a integer between 2 and K?1) to receiver n+1; calculating, performed by the receiver n+1, a precoding vector of transmitter n using the precoding vector of transmitter n?1; and transmitting, performed by the receiver n+1, the precoding vector of transmitter n to transmitter n.

Abstract: A power control method for interference alignment in wireless network having K transmitters and K receivers is provided. The method comprising: receiving, performed by receiver n (n is an integer, 1?n?K?1), a power indication signal of transmitter n+1 from the transmitter n+1; determining, performed by the receiver n, power of transmitter n; and transmitting, performed by the receiver n, a power indication signal of transmitter n to the transmitter n, wherein the power of transmitter n is determined based on a residual interference of the receiver n, and the power indication signal of transmitter n indicates a minimum transmission power or a maximum transmission power of transmitter n.

Abstract: A method for interference alignment in wireless network having 3 transmitters and 3 receivers which are equipped with M antennas is provided. The method comprising: transmitting, performed by each of the 3 transmitters, a pilot signal known to the 3 receivers; estimating, performed by each of the 3 receivers, each channel from transmitter; transmitting, performed by each of the 3 receivers, feedback information to target transmitter; and determining, performed by transmitter 2 and transmitter 3, a precoding vector; wherein a degree of freedom(DoF) of a transmitter 1 is (M/2??), a DoF of the transmitter 2 or the transmitter 3 is M/2.

Abstract: A phase change memory device is provided that includes a switching device, a bottom electrode contact in contact with the switching device and a porous spacer formed on the bottom electrode contact.

Abstract: Provided is an apparatus for identifying person's identity. User's eyeballs may be precisely located in an operation region of the apparatus for identifying the person's identity, i.e., a photograph region in which an iris image of a user to be identified by the camera can be photographed using an indicator provided by the apparatus for identifying the person's identity. Also, a limitation in which the user's eyeballs are located at positions different from each other due to person's parallaxes different from each other even though the indicator is provided at the same position may be solved to locate the eyeballs of the user to be identified using the apparatus for identifying the person's identity at the same position.

Abstract: A method for supporting coexistence in a mobile station configured for supporting a coexistence mode of a primary wireless communication system and a secondary wireless communication system. The method comprises transmitting to a base station, via the mobile station, a registration request (REG-REQ) message comprising coexistence capability information, receiving a registration response (REG-RSP) message comprising information about support of the coexistence mode in response to the REG-REQ message, and transmitting to the base station, via the mobile station, a sleep mode request (MOB_SLP-REQ) message comprising first coexistence information for requesting a band adaptive modulation and coding (AMC) for adjacent subcarrier permutation.

Abstract: A method of fabricating an array substrate for an organic electroluminescent display device includes forming a semiconductor layer, a semiconductor dummy pattern, a first storage electrode and a first gate insulating layer on a substrate; forming a second gate insulating layer on the semiconductor layer and the first storage electrode; forming a gate electrode and a second storage electrode on the second gate insulating layer; forming ohmic contact layers by doping impurities into both sides of the semiconductor layer; forming an inter insulating layer on the gate electrode and the second storage electrode; forming source and drain electrodes and a third storage electrode on the inter insulating layer; forming a passivation layer on the source and drain electrodes and the third storage electrode; forming a first electrode and a fourth storage electrode on the passivation layer; and forming a spacer and a bank on the first electrode.

Abstract: A method for transmitting channel information in a multi-antenna system, the method includes calculating channel quality information (CQI) with respect to each mode, comparing the CQI with respect to each mode to a threshold value with respect to each mode, and transmitting CQI with respect to a mode having higher CQI than the threshold value as channel information. Good performance can be achieved regardless of the number of users or an SNR of users.

Abstract: Disclosed are a feedback-transmitting method and data-transmitting method, and a method for generating a codebook that can be used in a system such as LTE-A. When multiple base stations operate in a cooperative mode, using a codebook generated according to the present invention, an existing codebook for single cell transmission can be used to generate a codebook for cooperative transmission.

Abstract: A method for supporting coexistence in a mobile station for supporting a coexistence mode of WiMAX and secondary wireless communication system while considering subchannel allocation, the method comprises, requesting a band adaptive modulation and coding (AMC) for adjacent subcarrier permutation to a base station by transmitting first coexistence information, after the secondary wireless communication is turned on, and requesting a release of the adjacent subcarrier permutation to the base station by transmitting second coexistence information, if the secondary wireless communication system is turned off. Accordingly, it is possible to provide simultaneity of different wireless communications when a sleep mode is used and improve simultaneity of different wireless communications even when the sleep mode is not used.

Abstract: The method for channel information feedback based on multiple cell collaboration comprises a step wherein first channel quality information including the channel information between the terminal and base station is transmitted to the base station; a step wherein after the first channel quality information is sent; a channel quality information request message is received from the base station; and a step wherein in response to the channel quality information request message, second channel quality information is sent, including channel information between the terminal and the base station and adjacent base stations.

Abstract: A phase change memory device and a method for manufacturing the same. The method includes the steps of defining bottom electrode contact holes by removing portions of an insulation layer, to expose bottom electrodes, on a semiconductor substrate on which the bottom electrodes and the insulation layer are sequentially formed; forming amorphous silicon spacers on inner sidewalls of the bottom electrode contact holes; and forming bottom electrode contacts in the bottom electrode contact holes.

Abstract: A method for supporting coexistence with a wireless personal area network (WPAN) is provided. A method for supporting coexistence with a WPAN in a mobile station which periodically receives a beacon signal for local wireless communication includes, at the mobile station, calculating the numbers of uplink frames which overlap with the beacon signal, configuring a bitmap using the calculated frame numbers, and transmitting coexistence information including the bitmap to a base station. Accordingly, when a broadband wireless access system and WiMedia or ZigBee are simultaneously used, a beacon signal of WiMedia or ZigBee can be efficiently protected from the interruption of the broadband wireless access system and thus WiMedia or ZigBee can be normally operated.

Abstract: A liquid crystal display device including a gate electrode and a gate line formed on a first substrate, a first insulating layer formed on the first substrate, an active pattern, an ohmic-contact layer, and a diffusion preventing layer formed on the gate electrode, a data line to cross source and drain electrodes and the gate line formed on the diffusion preventing layer to define a pixel area, a second insulating layer formed on the first substrate, a contact hole formed by removing a portion of the second insulating layer and exposing a portion of the drain electrode, a pixel electrode electrically connected with the drain electrode via the contact hole, and a second substrate attached with the first substrate in a facing manner, wherein the diffusion preventing layer comprises a metal tip protruded to the side of the source and drain electrodes.

Abstract: A method and apparatus of configuring a multi-cell precoding matrix for a multiple input multiple output (MIMO) operation in a wireless communication system in which a plurality of base stations participate in cooperative communication is provided. A multi-cell precoding matrix is configured using one or more single-cell precoding matrices, and wherein coefficients to be multiplied by the single-cell precoding matrices satisfy a condition in which the product between the multi-cell precoding matrix and a Hermitian matrix of the multi-cell precoding matrix is a unitary matrix. According to the embodiment of the present invention, it is not necessary for all base stations to perfectly know channel information. In addition, a feedback overhead is not high, and complexity is low.

Abstract: A phase change memory device is provided that includes a switching device, a bottom electrode contact in contact with the switching device and a porous spacer formed on the bottom electrode contact.

Abstract: A mobile internet system, mobile communication terminal thereof and method of controlling operation thereof are disclosed. According to an embodiment, the mobile internet system includes a mobile communication terminal configured to execute at least one of a scanning procedure and a ranging procedure. The mobile communication terminal first executes the scanning procedure rather than the ranging procedure in an interval where the scanning procedure and the ranging procedure are overlapped with each other.