Abstract: An apparatus for retransmitting data at a retransmission request from a receiver by a transmitter in a CDMA mobile communication system including a turbo encoder with a given coding rate and initially transmitting systematic bits and parity bits obtained by encoding the data by the turbo encoder using one modulation mode among a plurality of modulation modes. A controller determines a modulation mode to be used between the transmitter and the receiver in response to the retransmission request. A distributor distributes coded bits obtained by encoding the data at the coding rate into systematic bits and parity bits. A selector selects coded bits transmittable by the determined modulation mode among the systematic bits and the parity bits at the initial transmission, if the determined modulation mode is different from the modulation mode used at initial transmission. A modulator modulates the transmittable coded bits into modulated symbols according to the determined modulation mode.

Abstract: A data transmitting/receiving apparatus and method for improving the reliability of data bits in a CDMA mobile communication system. High-priority bits are mapped to a high-reliability bit position and low-priority bits, to a low-reliability bit position in symbols. Thus system performance is improved at a transmission.

Abstract: A method and an apparatus for redistributing differentiated power for transmitting high speed packet data according to UEs in high speed packet data transport system. The method and apparatus redistribute powers, which have been already assigned in order to transmit the high speed packet data, thereby improving the performance of the system.

Abstract: A method and apparatus for reducing other cell interference in a wireless communication system are provided, in which a symbol generator for generating at least one modulation symbols to be transmitted, a resource mapper for mapping and assigning the modulation symbols into a resource block common to a Base Station (BS) and at least one neighboring Base Station (BS), and a spreader for spreading the mapped modulation symbol with an BS-specific code allocated to the BS, the BS-specific codes of the BS being one of orthogonal and quasi-orthogonal to an BS-specific code allocated to the neighbor BS.

Abstract: A data transmitting/receiving apparatus and method using an antenna array in a mobile communication system. A Node B measures a transmission status of each transmission antenna, classifies transmission data according to priority, and transmits to a UE high-priority data through a transmission antenna at a relatively good transmission status and low-priority data through a transmission antenna at a relatively poor transmission status.

Abstract: In an apparatus for data transmission in a communication system, a turbo encoder encodes data bits to generate systematic bits and parity bits, and a rate matcher matches the systematic bits and parity bits. A first interleaver writes the rate-matched systematic bits on a row by row basis, and performs inter-column permutation. A second interleaver writes the rate-matched parity bits on a row-by-row basis, and performs inter-column permutation. A modulator alternatively collects the permutated bits on a column by column basis from the first and second interleavers, and maps collected bits from the first and second interleavers onto one modulation symbol, wherein a size of the first interleaver is equal to a size of the second interleaver.

Abstract: A transmitter simultaneously performs channel coding and rate matching in a CDMA mobile communication system. The transmitter encoders input bits into coded bits at a given mother code rate, and performs puncturing on the coded bits in order to match the number of coded bits to a predetermined code rate. Thereafter, the transmitter simultaneously performs rate matching for repeating or puncturing the coded bits in order to match the number of coded bits to the number of bits transmitted over a radio channel.

Abstract: A transmission/reception apparatus and method for performing packet retransmission considering a channel environment in a CDMA mobile communication system. Upon receiving a retransmission request from a receiver, the apparatus and method selects a modulation type to be used according to a condition of a transmission channel, and changes the previously used puncturing pattern in order to output the proper number of coded bits for the selected modulation type.

Abstract: Disclosed is a method for transmitting data comprised of bits with higher priority and bits with lower priority output from a coder, using a high-order modulator in which a bit stream comprised of at least 3 bits represents one symbol and includes a first bit part with higher reliability and a second bit part with lower reliability. The method comprises modulating the bits with higher priority and the bits with lower priority such that the bits with higher priority are mapped to the first bit part and the bits with lower priority are also mapped to the first bit part at initial transmission; and modulating the bits with higher priority and the bits with lower priority such that the bits with higher priority are mapped to the second bit part and the bits with lower priority are mapped to the first bit part at retransmission.

Abstract: A method for retransmitting coded bits by a transmitter in response to a retransmission request from a receiver in a mobile communication system which separates coded bits output from an encoder into coded bits with higher priority and coded bits with lower priority, and transmits from the transmitter to the receiver a stream of symbols obtained by symbol mapping the coded bits by a specific modulation technique. The method comprises determining orthogonal codes available for retransmission; separating the coded bits with higher priority and the coded bits with lower priority into a plurality of sub-packets with a given size, and selecting a part of the sub-packets or sub-packets to be repeatedly transmitted, depending on the determined number of available orthogonal codes; and transmitting a stream of symbols obtained by symbol-mapping coded bits of the selected sub-packets by the specific modulation technique, with the determined available orthogonal codes.

Abstract: Disclosed is a method for providing first and second interleaved bit streams to a modulator in order to transmit the first and second interleaved bit streams through at least two antennas in a mobile communication system. An encoder encodes a transmission data stream into a first bit stream with first priority and a second bit stream with second priority being lower than the first priority. An interleaver interleaves the first and second bit streams into the first and second interleaved bit streams. The modulator modulates the first and second interleaved bit streams.

Abstract: An apparatus and method for transmitting/receiving packet data in a mobile communication system. A first transceiver transmits packet data and control information for enabling demodulation of the packet data to a second transceiver. The second transceiver receives the control information and the packet data, demodulates the packet data according to the control information, and transmits ACK/NACK information indicating whether there is an error in the packet data, and channel state information for the second transceiver, to the first transceiver. The second transceiver transmits channel state information to the first transceiver according to a predetermined channel state information transmission cycle, and transmits channel state information regardless of the channel state information transmission cycle upon receiving an on-demand channel quality indicator (ODC) from the first transceiver.

Abstract: An apparatus and method for providing a bring-up simulation game in a mobile terminal that makes a call over a mobile communication network are provided. In the apparatus, a call detector monitors an incoming or outgoing call and collects bring-up call information from the monitored call. A call decider analyzes bring-up call information associated with a phone number mapped to a predetermined character among the collected bring-up call information, numerically quantizes the analyzed bring-up call information, and determines the growth stage of the character according to the numerical bring-up call information. A character controller updates the appearance and state of the character according to the growth stage of the character. A display displays the updated appearance and state of the character.

Abstract: An apparatus and method for performing a bring-up simulation to bring up a character are provided. In the apparatus, a sensor measures at least one of an ambient temperature of the mobile terminal, a remaining battery power of the mobile terminal and an amount of vibrations of the mobile terminal, a controller compares the measured value received from the sensor with a predetermined threshold, calculates bonus points and penalty points according to the measured value, and controls the state of a character according to the calculated bonus and penalty points, character generator sets or updates the state of the character according to internal conditions of the mobile terminal, external conditions of the mobile terminal and user interaction with the character via the mobile terminal corresponding to a control signal received from the controller, and a display for displaying the character in accordance with the state and growth stage of the character.

Abstract: A method for preventing a transmission delay of data packets transmitted through an uplink due to a transmission gap (TG) period occurring when a user equipment (UE) performs handover from a Node B to its neighbor Node B in a mobile communication system. In the method, the Node B sequentially transmits data packets to the UE through a plurality of subframes, and the UE transmits response signals for the data packets transmission-delayed for the TG period to the Node B through a subframe of an uplink dedicated physical control channel (DPCCH), following the TG period.

Abstract: A method for retransmitting coded bits by a transmitter in response to a retransmission request from a receiver in a mobile communication system. The method comprises determining a modulation technique to be used at retransmission as a modulation technique having a lower modulation order than a modulation technique used at initial transmission; determining a puncturing pattern according to an HARQ (Hybrid Automatic Repeat Request) type, and selecting as many coded bits as the number of coded bits that can be symbol-mapped by the determined modulation technique, among the coded bits punctured by the determined puncturing pattern; and symbol-mapping the selected coded bits by the determined modulation technique, and transmitting the symbol-mapped coded bits to the receiver.

Abstract: A method and apparatus for transmitting/receiving control information to support High Speed Downlink Packet Access (HSDPA) in a WCDMA communication system are provided. When transmitting new packet data, a Node B sets a New data Indicator (NI) to a specific bit value indicating an initial transmission for the packet data. Upon receipt of a retransmission request for the packet data, the Node B sets the NI as the inverse of a previous NI. If an redundancy version (RV) representing a constellation and a data type for packet data, is set to a specific value indicating an initial transmission, the Node B set the NI to the inverse of the specific bit value regardless of the previous NI. A User Equipment (UE) receives control information including the NI and the redundancy version (RV) and determines that the packet data is initial transmission data or retransmission data, according to the NI and the RV.

Abstract: A bit scrambling method and apparatus for packet transmission/reception in a wireless communication system are provided. A transmitter performs bit scrambling before CRC attachment and a receiver performs bit descrambling after a CRC check. This enables termination of iterative decoding at a turbo decoder according to the CRC check. Hence, power consumption is reduced and throughput is increased at a receiver.

Abstract: Disclosed is an apparatus and a method for transceiving high speed packet data, in which the high speed packet data are scrambled by using a scrambling code at a transmitter and the high speed packet data are de-scrambled by using a scrambling code at a receiver. When estimating a ratio of pilot power to traffic power, a problem caused by an unevenness of the power ratio is prevented. In addition, data is prevented from being transferred to an upper layer even if an HS-PDSCH is demodulated without UE data due to a detection error in an HS-SCCH during transmission of the HS-PDSCH.

Abstract: An apparatus and method for transmitting/receiving data using a multiple antenna scheme in a mobile communication system are provided. First and second code symbol sequences are generated by encoding a data symbol sequence for transmission in a predetermined encoding method. Transmission of the two code symbol sequences through the first and second transmit antennas is controlled such that if the data symbol sequence is initially transmitted, the first code symbol sequence is transmitted through the first transmit antenna and the second code symbol sequence is transmitted through the second transmit antenna and, if the data symbol sequence is retransmitted, the first code symbol sequence is transmitted through the second transmit antenna and the second code symbol sequence is transmitted through the first transmit antenna.