Abstract: Provided is a method and apparatus for secured communication between Bluetooth devices. A temporary Bluetooth Device Address (BD_ADDR) is generated and set if a Bluetooth communication request is generated in a secured mode and Bluetooth communication is performed using the temporary BD_ADDR; when the Bluetooth communication is terminated, the temporary BD_ADDR is released and eliminated and a default BD_ADDR is set. Thus, it is possible to prevent another Bluetooth device from performing the Bluetooth communication without a bonding process, thereby enabling secured communication.

Abstract: A method of reporting channel state information by a Mobile Station (MS) in a mobile communication system is disclosed. The method includes measuring a state of a downlink channel for the entire frequency band, determining a first Modulation and Coding Scheme (MCS) level corresponding to the measured channel state, and reporting the determined MCS level to a Base Station (BS).

Abstract: Disclosed is a method for quickly and conveniently establishing a connection between a master terminal and a slave device communicating with each other using Bluetooth. The slave device implements a special direct connection mode in which the slave device can be directly connected to the master terminal. When a user operates the slave device, the direct connection mode can be selected. The slave device notifies the master terminal of the direct connection mode. The master terminal establishes the direct connection with the slave device through paging without a slave address selection process. Since the direct connection with a target slave can be established without an address selection process, a time required for establishing a connection between the master and the slave can be significantly shortened, and also, the number of process steps can be reduced.

Abstract: A portable terminal is disclosed, having a first housing, a second housing that is rotatably combined with the first housing and moves toward or away from the first housing while facing the first housing, and a camera lens assembly provided on the second housing. The second housing moves toward or far from the first housing as it is rotated with respect to a predetermined hinge axis. The hinge axis provides a rotation axis of a lens housing of the camera lens assembly, the rotation axis extending in a longitudinal direction of the camera lens assembly and passing through the center of the camera lens assembly. The lens housing and the second housing rotate with respect to the first housing as the second housing is moved toward or away from the first housing and the lens housing are rotated with respect to the second housing by a user when desired.

Abstract: In the method for dynamic IP allocation using a mobile IP in a wireless portable Internet system, a MAC message used to register a mobile subscriber station contains a flag including a mobile IP version parameter. Upon checking the mobile IP version, the mobile subscriber terminal transmits a mobile IP registration request message to a base station during MAC connection establishment. The base station transmits a mobile IP registration reply message to the mobile subscriber in response to the received mobile IP registration request message to allocate a dynamic IP address to the mobile subscriber station. The dynamic IP allocation process is performed through a secondary management connection to achieve a rapid handoff without using a connection identifier. In addition, the present invention supports a seamless service and the use of the mobile IP in the IEEE 802.

Abstract: A data transmitting and receiving method between a mobile terminal and an information center in a navigation system is disclosed. The present invention is characterized in that if lower items of a destination are not received from the information center in the middle of receiving destination setting items to set the destination after the mobile terminal transmits a destination setting request message to the information center, the mobile terminal sends a reconnection request message and stored destination setting data.

Abstract: An apparatus and method is provided for increasing a channel change speed in a Digital Multimedia Broadcasting (DMB) receiving terminal. The apparatus includes a DMB buffering unit for buffering DMB data, a DMB extractor for extracting only DMB data of a currently set channel, and a controller for setting a changed channel into a DMB signal-receiving unit so that a DMB program can be output using extracted DMB data. DMB data output from the DMB signal-receiving unit is stored in the DMB buffering unit, and DMB data according to a channel set by the user is extracted. Thus, a channel change can be performed without stopping or restarting a DMB receiving operation of the DMB receiving unit, and the time required for the channel change is reduced.

Abstract: A terminal main body of a communication terminal is supplied power from a battery pack through a DC signal path. The terminal main body communicates with at least one additional function module providing an additional function through a communication path connected to the DC signal path so as to provide the additional function to a user. Herein, the communication path is an AC signal path. That is, a signal transmitted/received between the terminal main body and the additional function module is an AC signal, and thus, the communication path can be compatible with the DC signal path providing the power. In addition, a plurality of additional function modules can be serially connected in the form of a serial communication bus, and therefore, a user can select a plurality of additional functions.

Abstract: A method and apparatus for transmitting/receiving broadcast channels carrying downlink system information in an Orthogonal Frequency Division Multiplexing (OFDM)-based cellular wireless communication system supporting a scalable bandwidth. The method includes mapping first primary broadcast channel (P1-BCH) symbols including basic system information to a middle band centered at a center frequency of a system band and having a broadcast channel (BCH) transmission bandwidth, and mapping second primary broadcast channel (P2-BCH) symbols including core system information excluding the basic system information to first and second transmission bands that have the BCH transmission bandwidth and locate within both bands adjoining the center frequency on both sides thereof and having a minimum reception bandwidth supportable by User Equipments (UEs) within a cell respectively, when a bandwidth of the system band is at least two times of a minimum reception bandwidth.

Abstract: A method and apparatus for determining a power control target setpoint and transmission power of a secondary pilot signal for power control and channel estimation on a signal transmitted in a reverse direction in a mobile communication system. A mobile station determines transmission power of a secondary pilot signal based on a data rate of a reverse traffic channel to be transmitted. A base station adjusts a power control target setpoint according to received reverse data rate information, and performs channel estimation (or channel compensation) using a primary pilot signal and a secondary pilot signal (or a reverse rate indicator (RRI) channel signal).

Abstract: An apparatus and method for extracting pitch information from a speech signal. The apparatus includes a pilot pitch detector for extracting predicted pitch information from a frame of an input speech signal, a pitch candidate value selector for selecting one or more pitch candidate values from the predicted pitch information according to a predetermined condition, a harmonic-noise region decomposer for decomposing a harmonic-noise region using each of the selected pitch candidate values, a harmonic-noise energy ratio calculator for calculating an energy ratio of each of the decomposed harmonic regions to each of the decomposed noise regions, and a pitch information selector for selecting a pitch candidate value of a harmonic-noise region in which the maximum value among the calculated harmonic-noise energy ratio exists as a pitch value of the input frame of the speech signal.

Abstract: A method for allocating a sub-channel in a wireless communication system is disclosed. The method includes measuring a moving velocity of each of mobile stations (MSs); selecting MSs to which a sub-channel is to be allocated; determining a resource allocation period for sub-channel allocation to the MSs using the measured moving velocity; calculating an average amount of data to be transmitted for the determined resource allocation period, and sending a channel quality information (CQI) request to the MSs; upon receipt of CQI in response to the CQI request, allocating a sub-channel satisfying the average data amount taking the CQI into account; and transmitting a control signal for the sub-channel allocation to the MSs.

Abstract: A signal transmission/reception apparatus of a communication system. The signal transmission apparatus receives an information vector, encodes the information vector into a structured Low Density Parity Check (LDPC) codeword using a structured LDPC coding scheme, and transmits the generated structured LDPC code to the signal reception apparatus. Then the signal reception apparatus receives a signal, and detects an information vector by decoding the received signal using a decoding scheme corresponding to the structured LDPC coding scheme used in the signal transmission apparatus.

Abstract: A system for performing cell acquisition in a frequency overlay communication system having a first frequency band and a second frequency band including the first frequency band. A base station (BS) generates a reference signal used for identifying a cell using a specific sequence in a predetermined frequency band, and transmits the reference signal. A mobile station (MS) receives the reference signal to determine whether the BS uses the first frequency band or the second frequency band, determines a reference signal having a maximum correlation value through correlation calculation with at least one predefined sequence, and detects a BS identifier (ID) corresponding to the determined reference signal.

Abstract: A method and apparatus for selecting a Relay Station (RS) for a Mobile Station (MS) of a communication system are provided. The communication system is provided with the MS, a serving Base Station (BS) for providing the MS with a service and RSs for relaying signals of the MS and the BS. The MS receives RS information for increasing system capacity from the serving BS, measures reference signal strength of an RS indicated in the RS information, and selects an associated RS as a target RS for relaying a signal when the measured reference signal strength satisfies a condition.

Abstract: Provided are a system and a method for allocating resources in a communication system. The method includes mapping a Transmission Time Interval (TTI) class according to channel information transmitted from a mobile station and service class information of the mobile station; and allocating resources by dynamically configuring a frame based on the mapped TTI class.

Abstract: An apparatus and method for providing relay link zone information in a multi-hop relay BWA communication system, where a BS performs a network entry procedure with an RS during an initial access of the RS to the BS, generates a message including relay link zone information regarding a relay link zone in which the BS communicates with the RS, processes the message in a physical layer, and transmits the processed message to the RS.

Abstract: Provided is a method and apparatus for photographing an object to produce a still image while recording a moving picture.

Abstract: In an Automatic Repeat reQuest (ARQ) method for recovering ARQ data by a target base station when handover of a mobile terminal is performed from a serving base station to the target base station in a portable Internet system is provided. First ARQ data, which includes a first service data unit (SDU), a first ARQ block sequence number, and a first sub-ARQ block sequence number, that are buffered in the serving base station are received and second ARQ data, which includes a second SDU, are received from the serving base station. The received first SDU is divided into ARQ blocks and is transmitted to the mobile terminal; and the received second SDU is divided into the ARQ blocks and is transmitted to the mobile terminal.