Abstract: Disclosed are a file update system of a mobile communication terminal which is capable of recovering Same Owner ID Error caused by damage of a file header in an EFS (Embedded File System) area of the mobile communication terminal, a boot management system of a mobile communication terminal which is capable of preventing a fatal error caused by damage of a file header in an EFS area of the mobile communication terminal, a method of updating a file in the mobile communication terminal, and a method of booting the mobile communication terminal which is capable of preventing a fatal error caused by damage of a file header in an EFS area of the mobile communication terminal.

Abstract: Disclosed are a file update system of a mobile communication terminal which is capable of recovering Same Owner ID Error caused by damage of a file header in an EFS (Embedded File System) area of the mobile communication terminal, a boot management system of a mobile communication terminal which is capable of preventing a fatal error caused by damage of a file header in an EFS area of the mobile communication terminal, a method of updating a file in the mobile communication terminal, and a method of booting the mobile communication terminal which is capable of preventing a fatal error caused by damage of a file header in an EFS area of the mobile communication terminal.

Abstract: Disclosed is a data call terminating service system and method for a dynamic IP of a mobile communication terminal.

Abstract: In an apparatus and method for automatically detecting the presence of an external device in a port of a mobile terminal, the external device is automatically enabled without the additional operation of the mobile terminal when plugged into a jack. The mobile terminal may be safeguarded against severe damage being done thereto by mistakenly choosing options to enable an external device while an earphone/microphone set is plugged in the jack of a mobile terminal.

Abstract: Provided are a method and an apparatus for generating pseudo random sequence to generate pseudo random sequences which have larger sizes and are different from each other in a wireless communication system; a method for generating pseudo random sequence in a wireless communication system, comprising generating a first output sequence, generating a second output sequence, and generating a third output sequence; and an apparatus to generate pseudo random sequence in a wireless communication system, comprising a first linear feedback shift register (LFSR), a second LSFR, and a third LFSR, a first initial value mapper, a second initial value mapper, a third initial value mapper, and an N delay operator.

Abstract: A transport layer control device includes a controller to establish or release a transmission control protocol (TCP) connection and to process retransmission of a lost packet using TCP, and a packet processor to number packets and to process transmission of the numbered packets using a user datagram protocol (UDP). A method for transmitting a packet includes establishing the TCP connection with a receiving device, numbering packets and transmitting the numbered packets to the receiving device using UDP, and retransmitting a lost packet to the receiving device using TCP in response to a retransmission request for the lost packet. A method for receiving a plurality of packets includes establishing the TCP connection, receiving numbered packets using UDP, requesting retransmission of a lost packet using TCP, and receiving the lost packet through TCP.

Abstract: A system and a method for releasing quality of service (QoS) resources in a mobile communication network enable QoS resources allocated to a mobile terminal to be released, if, after the mobile terminal is allocated with resources for QoS through an Evolution-Data Optimized (EVDO) Revision A (rA) network to receive data serves, the mobile terminal escapes from the EVDO rA network without first performing a resource release request to the EVDO rA network. The system and method may be implemented in the mobile terminal, the access network, the text message server, or any combination thereof, for releasing the allocated QoS resources without requiring the mobile terminal to re-connect to the EVDO rA network.

Abstract: A mobile communication terminal supporting a teletypewriter (TTY) device for a hard-of-hearing or speech-disabled user is provided. The mobile communication terminal includes: a controller activating a vocoder corresponding to a TTY mode selected by a user; a vocoder encoding a Baudot tone received from the TTY device into a voice data packet based on the selected TTY mode; a TTY mode processor including TTY mode information selected by a user in part of the voice data packet; and an RF transmitter transmitting an encoded voice data packet including the TTY mode information.

Abstract: A handover method from a WCDMA network to a CDMA network in a system comprising a mobile communication terminal, a RNC of the WCDMA network and a BSC of the CDMA network comprises: transmitting a measurement control message for commanding cell power measurement on a WCDMA cell and a beacon cell in the RNC into the mobile communication terminal; transmitting a measurement report message into the RNC in the mobile communication terminal after measurement of the cell power on the WCDMA cell and the beacon cell; and determining a handover into a CDMA cell in the RNC depending on the measurement report message when there is no more receivable WCDMA cell.

Abstract: Disclosed herein are a mobile communication terminal equipped with a location-based short message service (SMS) system, a location-based message generation method and a location-based message display method. The mobile communication terminal having a location-based SMS (short message service) system includes a message sending module which receives from the message sender a message content, a telephone number of a mobile communication terminal of a designated message recipient, and a message mode, generates from location information received from the sender an SMS message containing the message content, mode identification information based on the message mode, and the location information if the message mode selected by the message sender is a location-based message mode rather than a general message mode, and sends to an SMS server the generated SMS message which is set to be forwarded to the telephone number of the message recipient's mobile communication terminal as a destination.

Abstract: A method of processing an error frame that occurs in packet data communication between a mobile station and a communication server which exchanges packets with the mobile station over a radio network may be carried out by a mobile station. The method carried out by the mobile station includes the steps of: a) detecting an error having occurred in received packet data during communication in a radio network; and b) requesting the communication server to retransmit the packet data without reducing the congestion window size. In addition, the method carried out by a communication server includes the steps of: a) detecting an error having occurred in transmitted packet data during communication in a radio network; and b) retransmitting the packet data without reducing the congestion window size.

Abstract: A packet switched radio telecommunication system supporting hard handover adapts Always_on technology to a link between a target packet data serving node (PDSN) and a support PDSN. The support PDSN assigns a temporary IP address to a mobile terminal in its service area, and transmits handover data and the mobile terminal's temporary IP address to the target PDSN via a direct link when the mobile terminal leaves the service area. The target PDSN, upon receiving a registration request for the temporary IP address from the mobile terminal moved to its service area, temporarily registers the temporary IP address in an IP pool. The target PDSN receives down-link frame data for the mobile terminal at the temporarily registered IP address from the support PDSN via the direct link. A new temporary IP address is assigned by the target PDSN when data transmission/reception is complete to the mobile terminal.

Abstract: Disclosed is an IC chip type hearing aid module for use in a mobile communication terminal having a hearing aid circuit including: a first section having a resistor R1 and an inductor L1 which are connected in series on a first output line Receiver_P between the mobile communication terminal and an ear speaker; a second section having a resistor R4 and an inductor L2 which are connected in series on a second output line Receiver_N between the mobile communication terminal and the ear speaker; a third section having a resistor R2 and a capacitor C2 which are connected in series between an input terminal of the first section and an output terminal of the second section; and a fourth section having a resistor R3 and a capacitor C3 which are connected in series between an input terminal of the second section and an output terminal of the first section.

Abstract: A packet switched radio telecommunication system supporting hard handover adapts Always_on technology to a link between a target packet data serving node (PDSN) and a support PDSN. The support PDSN assigns a temporary IP address to a mobile terminal in its service area, and transmits handover data and the mobile terminal's temporary IP address to the target PDSN via a direct link when the mobile terminal leaves the service area. The target PDSN, upon receiving a registration request for the temporary IP address from the mobile terminal moved to its service area, temporarily registers the temporary IP address in an IP pool. The target PDSN receives down-link frame data for the mobile terminal at the temporarily registered IP address from the support PDSN via the direct link. A new temporary IP address is assigned by the target PDSN when data transmission/reception is complete to the mobile terminal.

Abstract: A mobile communication terminal having a function of managing multimedia data is provided, including: a main memory including a multimedia database storing the multimedia data; a signal processor converting the multimedia data stored in the main memory into data of a format suitable to be output to a display of the mobile communication terminal; a back_end chip which processes the multimedia data outputted from the signal processor, stores digest information of multimedia data upon occurrence of an update event of the multimedia data, and provides the stored digest information upon receiving a signal of requesting the digest information to be synchronized; and a front_end chip including a controller which requests the digest information stored in the back_end chip, compares and synchronizes the digest information offered from the back_end chip and digest information stored in advance in the front_end chip.

Abstract: A method is disclosed for transmitting a packet from a correspondent node to a mobile node when the mobile node moves from a home network to an external network equivalent to the correspondent node's local network. The method may include securing a Care Of Address (COA) for the mobile node. The COA may be used to forward a packet intended for the mobile node by a home agent in the home network. The method may also include obtaining the COA at the home agent to update binding information on the mobile node, transmitting the updated binding information to a correspondent node, and setting a target IP address for the packet transmitted by the correspondent node. The target IP address may be the COA of the mobile node when the correspondent node's local network is the same as the external network where the mobile node is located.

Abstract: Disclosed are a hybrid phone and a method of acquiring channels in the hybrid phone. The hybrid phone having a first communication mode supporting voice/low-rate data communications and a second communication mode supporting high-rate data communication includes a phone control unit having a communication processor controlling voice/data communications according to programs stored in a memory. The communication processor includes a channel acquisition processor attempting to acquire channels for the first and second communication modes. If the channel acquisition processor cannot acquire a channel for the second communication mode within a predetermined time, the channel acquisition processor stops attempting to acquire the channel for the second communication mode and reattempts to acquire channel for the first communication mode.

Abstract: Disclosed is a PPP session termination system and method in a dormant state of a mobile communication terminal. The PPP session termination system in the dormant state of the mobile communication terminal includes a mobile communication terminal processing module. When the mobile communication terminal enters into the dormant state, the mobile communication terminal processing module transmits a notification message containing time limit information concerning termination of a PPP session between the mobile communication terminal and a mobile communication system to the mobile communication system, and terminates the PPP session of the mobile communication terminal at the expiration of the time limit when there is no data transfer between the mobile communication terminal and the mobile communication system during the time limit.

Abstract: A method and apparatus for extracting chrominance shape information for an interlaced scan type image, which are used in a video compression coding/decoding system or a video manipulation equipment/system. According to the present invention, in an interlaced scan type image with arbitrary luminance shape information, chrominance shape information is extracted on the basis of four adjacent luminance shape pixels in two lines of the same type field. The present method and apparatus can solve a color bleeding problem in a conventional chrominance shape information extraction method considering no characteristic of the interlaced scan type image. Therefore, the present invention has the effect of significantly improving subjective picture quality.

Abstract: Disclosed is an image/audio playback technology in a mobile communication terminal. According to the present invention, a single image is divided into two halves, i.e., left-half and right-half images, which are displayed on two mobile communication terminals, respectively. In addition, two mobile communication terminals can play left-side and right-side audio data, respectively, which compose stereo audio data, according to the relative locations of the two mobile communication terminals.