Abstract: A Digital Rights Management (DRM) content player and play method for a portable terminal are disclosed. The DRM content player includes a first memory unit for storing a license stating usage rights upon an associated DRM content, and a content list of DRM contents, a second memory unit for storing the DRM content associated with the license, wherein the DRM content and associated license are received from an external source, a first controller for controlling the first memory unit, and finding a desired license in the first memory and sending the found license to the second memory unit, and a second controller for communicating with the first controller and controlling the second memory unit.

Abstract: A visible light communication system and method for transmitting and receiving an information symbol in a visible light communication system for a Color Code Modulation (CCM) scheme using a chromaticity diagram. The method includes determining a first coordinates value corresponding to an information symbol to be transmitted on the chromaticity diagram; determining a first color ratio corresponding to the first coordinates value; determining a second coordinates value corresponding to a compensation symbol for compensating for the first color ratio into a color white and determining a second color ratio corresponding to the second coordinates value; and emitting a visible ray corresponding to each of the first color ratio and second color ratio. The first and second coordinates values are located on a line on the chromaticity diagram.

Abstract: A method and apparatus for transmitting and receiving a control channel message in a Multiple Input Multiple Output (MIMO) mobile communication system are provided, in which a control channel message generator generates a pilot/MIMO field indicating at least one of a pilot format, a MIMO transmission rank being a number of transmission layers for transmitting encoded packet streams, and precoding information for MIMO data transmission, and outputs a control channel message including the pilot/MIMO field, and a transmission module converts the control channel message to a radio signal and transmits the radio signal to an MS. In the case of using common pilots for data demodulation and at least one of knock-down precoding and ready-made precoding for the MIMO transmission, the pilot/MIMO field includes information about the at least one precoding. In the case of dedicated pilots for data demodulation, the pilot/MIMO field indicates a format of the dedicated pilots.

Abstract: A method for transmitting and receiving data of a terminal in a communication system and a communication terminal thereof are provided, which can minimize an exposure of authentication information. A communication terminal includes a rolling token generation unit for generating the rolling tokens; a memory for storing the generated rolling tokens; and a control unit for, if an authentication of the other terminal for performing a communication is completed, generating and transmitting a rolling token whenever a transmission to the other terminal is performed, and in case of receiving a specified rolling token from the other terminal, determining whether the rolling token currently received from the other terminal is identical to the rolling token most recently transmitted.

Abstract: A device for inputting characters or numbers in a mobile terminal having a touch screen, the device including a display screen for displaying characters or numbers at a display area and a wheel for selecting a desired character or number at another display area in a text input mode; and a control unit for controlling the display screen to display the characters or numbers and the wheel for selecting a desired character or number at the display areas, placing a cursor on a character or number corresponding to rotation of the wheel, and controlling the display screen to display a character or number selected by placing the cursor.

Abstract: The present invention relates to a common channel generating method and device in a downlink. Receiving performance by the mobile station is improved by efficiently allocating the resource and generating the common channel in the downlink. Also, transmission diversity applied to the number of transmit antennas of the base station and the common channel can be easily detected, thereby acquiring the mobile station's initial process.

Abstract: An antenna device of a mobile terminal that can secure radiation performance is provided. The antenna device having a battery cover composed of a metal material includes a radiation unit for transmitting and receiving a signal, a feeding unit formed at an end portion of a first side of the radiation unit for electrically connecting the radiation unit to a Printed Circuit Board (PCB), and a ground part disposed a predetermined distance from the feeding unit and formed at a second side of the radiation unit. When the battery cover is fastened to the mobile terminal, the ground part contacts a first side of the battery cover.

Abstract: A navigation device is provided. The device includes a driving state tracker for tracking a mobile driving state using a current mobile position and RGI (Route Guidance Information) data including driving information on multi-routes from the current mobile position to a destination, and outputting deviation information and the current mobile position when a mobile object is deviated from a route; and a re-routing unit for searching partial routes from a mobile deviation position to each of the multi-routes using the deviation information, the current mobile position and the driving information on the multi-routes, and re-routing a route to the destination using each of the partial routes.

Abstract: A method and apparatus for transmitting and receiving forward channel status information in a multi-carrier mobile communication system. An MS transmits to a BS forward channel status information representing an average C/I of forward signals with respect to a plurality of carriers, the maximum of the forward signal C/Is, or each of the forward signal C/Is. The forward channel status information is absolute C/I information representing a current C/I, or relative C/I information representing a difference of the current C/I from a previous C/I.

Abstract: A method and apparatus for transmitting a control channel in a base station for a wireless communication system. The base station transmits information including a number of channel elements constituting control channels, to a terminal; establishes a set of control channels that the terminal can receive, within the number of channel elements using an identifier (ID) of the terminal; and transmits control information to the terminal through a selected control channel among the control channels. The terminal is restricted to monitor only a proper number of control channels established without the need to monitor all control channels, thereby reducing reception complexity and avoiding unnecessary battery consumption.

Abstract: An apparatus and a method for preamble pseudo noise code allocation in a broadband wireless communication system are provided. The method includes defining an inherent index for each FA, allocating a preamble PN index to base stations using a reference FA index, defining an inherent offset by each FA for remaining FA indexes, and shifting the preamble PN index allocated to the base stations using the reference FA index by the defined offset, and allocating the preamble PN index to base stations using the remaining FA indexes. The price of a system can thus be lowered by reducing a Peak-to-Average Power Ratio (PAPR) of a preamble, increase the number of FAs that a specific amplifier can amplify, and immediately allocate a preamble PN index when adding a new FA during an operation of a system.

Abstract: Provided is a system and method for sending a “voice message” to a recipient without any intervention of a network. A user initiates a Short Voice Message (SVM) service (or short voice messaging) function and records a voice message within a device. The user sends the recorded voice message through a normal voice call. During a call setup, the recipient decodes a received call setup message and recognizes the call as a voice message. The recipient sets parameters for recording the voice message. Upon completion of the call setup, the user sends the recorded voice message directly to the recipient. The recipient records the voice message and stores the voice message in an inbox. Thus, the user can be provided with an option for directly sending a voice message without text typing or a text-to-voice conversion technique.

Abstract: Disclosed is a boss reinforcing apparatus of a portable communication device including a press member, the boss reinforcing apparatus including at least one reinforcing part assembled with a boss that is formed on a case of the portable communication device when the case is insert-injection-molded onto the press member, to reinforce the boss and prevent a screw assembling part formed on the boss from separating from the boss.

Abstract: Provided is a method and apparatus for managing radio resources in a mobile communication system. The method includes periodically detecting a current radio resource availability state with in a cell, and broadcasting information about the current radio resource availability state to a mobile terminal.

Abstract: Disclosed are a focus detecting apparatus capable detection in various light illumination conditions and an image acquiring apparatus having the same. The focus detecting apparatus may include a mark disposed on a primary image plane. A pair of images of the mark is detected by a sensor, the distance between which images is used to determine the main wavelength of the light received from a subject. The main wavelength is used in determining the chromatic aberration correction by which the defocus amount may be adjusted.

Abstract: Disclosed are a system and a method for optimizing a handover process in a mobile broadband wireless access system. The method performs handover in a mobile communication system including a mobile subscriber station, a serving base station currently providing service to the mobile subscriber station, and at least one neighbor base stations adjacent to the serving base station. The method includes the steps of receiving a handover request from the mobile subscriber station by the serving base station; instructing the mobile subscriber station to perform handover by the serving base station in response to the handover request from the mobile subscriber station and performing by the mobile subscriber station a network reentry process for fast handover in accordance with information included in a handover instruction from the serving base station.

Abstract: A method and apparatus for transmitting and receiving control information in an SC-FDMA system are provided. Different orthogonal codes are generated for different slots each including a plurality of SC-FDMA symbols in a subframe. A control channel signal is generated by multiplying control symbols carrying control information by a sequence allocated for CDM of the control information. The control channel signal is multiplied by chips of the orthogonal codes on an SC-FDMA symbol basis and transmitted in the SC-FDMA symbols.

Abstract: A sliding-type mobile communication terminal having a first housing and a second housing opened or closed by means of a sliding movement in a longitudinal direction of the first housing, The terminal includes a spring module adapted to provide a sliding force, along the longitudinal direction, for closing of the second housing within a predetermined range of distance, and for providing the sliding force in an opposite direction for opening of the second housing beyond the predetermined range of distance. The spring module includes link bars rotatably coupled in one end onto the first housing, coil springs supported by one end of the link bar and coupled to enclose the link bar, and a slider slidably coupled to the link bar to be acted upon by an elastic force from the coil spring. The coil springs implement a semi-automatic sliding opening/closure of the second housing.

Abstract: A system and method for fast network re-entry in a broadband wireless access communication system. A mobile station transmits a first message requiring fast network re-entry to a base station and performs the fast network re-entry together with the base station when receiving a second message approving the fast network re-entry from the base station. The base station receives the first message, authenticates the first message using final session information of the mobile station that is previously stored in the base station, transmits the second message to the mobile station when succeeding in authentication of the first message, and performs the fast network re-entry together with the mobile station.

Abstract: A method, a terminal, and a system for establishing a Push to Talk Over Cellular (PoC) group session in a PoC network based on session initiation information, such as information regarding presence of clients to be invited or session start-up time. According to the method, Universal Resource Indicator (URI) information regarding invitation and Information Reservation Service (IRS) parameters are set up in a PoC eXtensible markup language Document Management Server (XDMS), and a PoC server is requested to provide an IRS so that a session is established.