Abstract: Provided are an apparatus and method for providing VoIP service based on an IP multimedia subsystem (IMS). When a MS is located indoors, it accesses the IMS through a VoIP gateway. When the MS is located outdoors, it accesses the IMS through an IEEE 802.16 system. Therefore, the VoIP service can be provided over one telephone number allocated to the MS.

Abstract: Disclosed is an apparatus and a method for transmitting a control channel message, which can reduce resource waste in an OFDM system multiplexing and using a Block Resource Channel (BRCH) and a Distributed Resource Channel (DRCH) in a frequency axis. The apparatus includes a controller for generating a predetermined field and outputting a control channel message including the predetermined field, the predetermined field indicating a precoding index when a common pilot is used for data demodulation in a mobile station and indicating a pilot format of a dedicated pilot when the dedicated pilot is used for data demodulation in the mobile station, the precoding index indicating a weight value for beam-forming of each antenna; and a transmission module for converting the control channel message into a wireless signal and transmitting the wireless signal to the mobile station.

Abstract: Disclosed is a method and an apparatus for reordering received packets in a mobile telecommunication system supporting HARQ so that the problem of order change is solved. The method includes receiving from a receiving-side HARQ entity an input of a packet and processing time spent by the packet going through an HARQ operation; determining if a gap corresponding to at least one missing packet among received packets is detected based on the input packet belonging to the received packets and, when the gap is detected, waiting for the missing packet belonging to the gap to be received for a period of time obtained by subtracting the processing time from a predetermined maximum waiting value; and outputting the received packets to an upper layer in an order when the missing packet belonging to the gap fails to be received before the expiration of the period of time.

Abstract: Disclosed is a mobile communication terminal having an embedded system for software download and a method for software download. The embedded system comprises a first memory including a code area for storing operation code of the mobile communication terminal, a data area for storing user data, and an area for storing a file system for managing the data area, a second memory for storing the least amount of code required for software download when software is upgraded, the operation code and the file system, and a control unit for booting the embedded system on the basis of the second memory when the software is upgraded, and then storing a downloaded current version of the software module in the data area of the first memory using the file system.

Abstract: A scheduling apparatus for a base transceiver system (BTS), determines a point of data transmission to mobile stations (MSs). The BTS includes buffers for storing data to be transmitted to the MSs. A scheduler determines a priority of each of the MSs taking into account a data rate determined depending on a channel condition between the BTS and the MSs, a required amount of transmission data, and an amount of data to be transmitted to the MSs, and determines an MS having the highest priority among the MSs, as a destination MS to which data is to be transmitted by the BTS. The scheduler increases the required amount of transmission data upon receipt of a retransmitted data packet, and decreases the required amount of transmission data after transmitting data to the MSs.

Abstract: Disclosed is a stylus pen combined with an antenna in a touch screen type-wireless terminal. The stylus pen has a built-in antenna and is detachably disposed in the touch screen type-wireless terminal, and the built-in antenna makes electrical connection with an antenna contact portion of an RF board of the terminal when the stylus pen is completely inserted in the terminal, such that the terminal has an improved antenna radiation characteristic and quality when compared with a terminal only having a fixed terminal antenna. The built-in antenna in the stylus pen may be a ?/4 dipole antenna or a ?/4 monopole antenna.

Abstract: Disclosed is an apparatus and method for data transmission/reception in a mobile telecommunication system, and more particularly to an apparatus and method for data transmission/reception in a mobile telecommunication system employing an Orthogonal Frequency Division Multiplexing (OFDM) scheme. The method includes identifying a CHannel IDentifier (CH_ID), which represents a first resource indicated by a Forward Shared Control CHannel (F-SCCH) among all resources; identifying a second resource indicated by resource assignment information for group terminals; and when the first resource includes all or a part of the second resource, and a third resource unused by the group terminals exists in the entire or part of the second resource, transmitting/receiving data by means of the third resource and a fourth resource, which is a remaining part of the first resource excluding the second resource.

Abstract: A handover method and apparatus in a digital multimedia broadcasting (DMB) system that transmits/receives broadcast data through a frame group using different frequencies. A handover method includes receiving a first frame group header at a serving frequency, and receiving a burst of the desired service at the serving frequency according to a burst arrival time; calculating a first relative start time of a next frame group header; turning power off until a current time arrives at a next header arrival time; receiving a second frame group header at a searching frequency, and acquiring service information of the searching frequency necessary for handover to the searching frequency; returning to the serving frequency and turning the power off; and comparing signal power/quality of the listened frequencies with each other to select a best frequency, and switching to the selected frequency using the acquired corresponding service information.

Abstract: A method for selecting a system in a mobile terminal is disclosed. The method includes upon power-up of the mobile terminal, reading system information included in a Most Recently Used (MRU) table from memory, and registering the system information in a variable area of a system search table; reading system information from a Preferred Roaming List Acquisition (PRL ACQ) table stored in the memory, and registering the system information in a fixed area of the system search table; and performing system search based on the system search table.

Abstract: A method and apparatus is provided for receiving data in a receiver of a communication system. In the receiver, a first calculator calculates a Log Likelihood Ratio (LLR) value of data transmitted from a transmitter, a decoder performs iterative decoding on the transmitted data using the LLR value calculated by the first calculator. A second calculator determines whether there is an error in the decoded data by calculating an error of the data decoded by the decoder. A storage stores an LLR value of the decoded data according to the determination result of the second calculator. An adder adds up the LLR value calculated by the first calculator and the LLR value stored in the storage.

Abstract: A method is disclosed displaying digital broadcasting channel information in a wireless terminal. The method for displaying digital broadcasting channel information in a folder-type wireless terminal including a main body and a sub-body installed on the main body in such a manner that the sub-body is movable between opened and closed positions with respect to the main body, the sub-body including an internal display part installed on an inside surface of the sub-body and an external display part installed on an outside surface of the sub-body, includes creating a list of current broadcast programs for channels based on digital broadcast program guide data, which are previously stored, if a predetermined key is input in a state where the sub-body is opposite to the main body, and displaying the created list of the current broadcast programs for channels on the external display part.

Abstract: There is provided a method of easily inputting icons representing user emotions (emoticons). In the emoticon input method in a mobile terminal, a plurality of emoticons, formed by utilizing a plurality of typical characters and special characters in combination, are grouped and stored by groups in the mobile terminal. The mobile terminal enters an emoticon input mode, displays the stored emoticon groups, displays the emoticons of an emoticon group selected by a user, stores an emoticon selected by the user, and transmits an SMS message including at least one emoticon selected by the user.

Abstract: In order to detect a degree of voicing of a speech signal, an input speech signal is converted to a speech signal in the frequency domain, a pitch value is calculated from the speech signal, a plurality of harmonic peaks existing in the speech signal are detected, and a difference obtained by comparing the pitch value to an interval between adjacent harmonic peaks among the detected harmonic peaks is detected as the degree of voicing included in the speech signal.

Abstract: A multicarrier communication system is provided that divides a full frequency band into a plurality of sub-carrier frequency bands, generates a plurality of segments having a frequency-time domain occupied by a predetermined number of sub-frequency bands and a predetermined number of time intervals, and classifies a plurality of segment types according to each of the segments, for data transmission. A mobile subscriber (MS) measures a channel state, extracts channel state information corresponding to the channel state, estimates a segment type using the extracted channel state information, and if there is a need for a change in the segment type, the MS transmits a segment type change request message to a base station (BS). Upon receiving a segment type change grant message from the BS, the MS receives data in a segment type corresponding to the received message.

Abstract: Disclosed is a method and system for allocating resources in a communication system. The method includes calculating a size of a transmission area for transmitting the generated data when data to be transmitted to mobile stations is generated; and controlling data to be transmitted through the transmission area and then allocating the controlled data to the transmission area according to priorities of data bursts based on sizes of the data bursts.

Abstract: Disclosed is a multi-band antenna unit of a mobile terminal that includes an antenna, switch, sensor, first matching circuit, second matching circuit, diplexer, first signal processing unit, and second signal processing unit. The antenna is movably installed between first and second contacts, and transmits and receives first and second signals of different frequency bands. The switch connects the first contact to the first matching circuit or the second contact through the second matching circuit. The sensor detects an antenna position, and allowing selective connection of first or second matching circuits. Transmission and reception of multiple signals of various frequency bands is enabled using a single antenna unit, reducing the number of components, cost, and size of a mobile terminal. Additionally, performance of an antenna is improved by connecting to a proper matching circuit according to the position of the antenna.

Abstract: Disclosed is a method for reducing booting time of a wireless terminal by decreasing the time taken for copying the codes of the NAND memory to the RAM, and thus shortening the time taken for readying the wireless terminal. The method includes executing a program counter of the code region of a virtual memory, determining whether a page table contains the physical address of a first physical memory mapped by the corresponding virtual address of the virtual memory reached by the program counter, causing an abort handler to assign the physical address mapped by the corresponding virtual address to the page table if the page table does not contain the physical address mapped by the corresponding virtual address, copying the code of the corresponding virtual address for performing the booting mode at the corresponding physical address of the first physical memory, and repeating the previous steps to copy all the codes for performing the booting mode to the first physical memory.

Abstract: An apparatus and method for implementing SDMA in a multi-user multi-antenna system are provided, in which SDMA users are selected from among total users according to channel state information of the total users, and the number of transmission streams to be allocated to each of the SDMA users is determined by a tree search method.

Abstract: Disclosed is a method for allocating an IP address. The interface ID value of an IP address allocated to a mobile terminal upon IP communication in a mobile communication system is set by using country information, mobile network information and a telephone number stored in the mobile terminal. The mobile terminal enables IP communication with a receiving-side mobile terminal even if the mobile terminal has information related to only the telephone number of the receiving-side mobile terminal.

Abstract: A touch screen of a mobile terminal and a power saving method thereof are provided. The power saving method of a touch screen for a mobile terminal includes determining whether a touch panel is contacted by controlling light emitting elements to emit light with a first scan speed and detecting whether light is received by light receiving elements; and decreasing, if the touch panel is determined not to be contacted for a predetermined time duration, a scan speed from the first scan speed to a second scan speed after lapse of the predetermined time duration. Therefore, if a contact occurs within the predetermined time duration, the contact is detected by executing the scan with the first scan speed, and if no contact is detected before lapse of the predetermined time duration, the scan speed is decreased, whereby electric current waste due to the scan can be minimized.