Samsung Electronics Co., Ltd.

Jin-Weon Chang

Sung-Ho Choi

Kook-Heui Lee

Ju-Ho Lee

Hyeon-Woo Lee

Sung-Hoon Kim

Joon-Goo Park

Hwan-Joon Kwon

Jin-Kyu Han

Youn-Sun Kim

Dong-Hee Kim

Hye-Young Lee

Yong-Jun Kwak

Dae-Gyun Kim

Sung-Oh Hwang

Hyun-Woo Lee

Seong-Hun Kim

Kwang-Yung Jeong

Young-Bin Chang

Soon-Young Yoon

Jung-Soo Jung

Jae-Weon Cho

Beom-Sik Bae

Hoon Huh

Jin-Seok Lee

Seong-Ill Park

Sie-Joon Cho

Song-Hun Kim

Jae-Yoel Kim

Sung-Jin Kim

Ping Wang

Soeng-Hun Kim

Ho-Kyu Choi

Hyun-Seok Lee

Gang Liu

Cheol Mun

Ki-Ho Jung

Chunhua Wang

Een-Kee Hong

Hyoung-Gwan Kim

Li Xiaoqiang

Tao Fan

Jung-Gon Kim

Du GaoKe

Wang Ting

Zhang Shuwei

Min-Kyeong Kim, Legal Representative

An apparatus and method for multiplexing packets for broadcast services in a mobile communication system based on orthogonal frequency division multiplexing (OFDM). The OFDM system has a transmission structure in which one slot includes at least two symbols, and each symbol includes a plurality of subcarriers. Different broadcast service packets received from at least two channels are multiplexed into one slot and a result of the multiplexing is transmitted. Overhead information of the channel packets multiplexed into the one slot is generated and transmitted.

Apparatus and method for multiplexing packets for broadcast services in a mobile communication system based on orthogonal frequency division multiplexing

An apparatus and method for transmitting and receiving packet data using multiple antennas in a wireless communication system is provided. In a wireless communication, system using multiple antennas, the apparatus and method can efficiently transmit and receive packet data according to channel conditions without a waste of transmission bandwidth.

Apparatus and method for transmitting and receiving packet data using multiple antennas in a wireless communication system

Disclosed is a structure of a downlink common channel for transmitting an ACK/NACK to notify whether retransmission should be performed through a transmission position of the downlink common channel according to a channel code of a time slot allocated to a UE, and a method for distinguishing an ACK from a NACK, in using a HARQ scheme for uplink transmission of a TDD CDMA scheme in a 3G mobile communication.

Method for transmission of ACK/NACK for uplink enhancement in a TDD mobile communication system

Disclosed is an apparatus for determining transmit power of an uplink frame transmitted from a subscriber station to a base station and transmitting data in a mobile communication system in which a downlink frame, transmitted from the base station to the subscriber station, and the uplink frame are time division-duplexed (TDD). The apparatus includes a receive power measurement unit for measuring receive power of signals received from the base station; a transmit power controller for determining the transmit power of the uplink frame from the receive power measured by the receive power measurement unit and information related to receptions of an uplink frame, which is received from the base station; and a transmission radio frequency processor for performing radio processing so that the uplink frame is transmitted according to the transmit power determined by the transmit power controller.

Method and apparatus for adaptive open-loop power control in mobile communication system using TDD

An apparatus and method for providing multimedia broadcast and multicast services in a CDMA (Code Division Multiple Access) mobile communication system. The apparatus and method enable a common MBMC (Multimedia Broadcast/Multicast Control) layer to be allocated between a plurality of cells, enable MBMC layers to be classified on the basis of types of services, and use the classified MBMC layers. That is, individual MBMC layers do not have to store large-capacity data because a unique service or transmission rate in each of cells is based on a slow rate, and the individual MBMC layers corresponding to respective cells process a service requiring complex scheduling. Moreover, the apparatus and method enable the same information to be provided to a plurality of cells and enable a streaming-type service to be processed in a common MBMC layer commonly used in the cells. The apparatus and method can not only reduce an overhead of storage and processing devices but also minimize a time difference between broadcast and multicast timings of different cells, by enabling the common MBMC layer to commonly process MBMS information for the plurality of cells.

Apparatus and method for controlling packet data to provide multimedia broadcast/multicast services in a CDMA mobile communication system

A communication system supporting an HSDPA (High-Speed Downlink Packet Access) service. In order to transmit common information to at least two UEs (User Equipments) among a plurality of UEs supporting the HSDPA service, the system transmits control information including common ID information indicating the common information over a shared control channel (SHCCH), upon generation of the common information. The system transmits the common information over the SHCCH in a TTI (Transmission Time Interval) equal to or after a TTI where the control information is transmitted, so that the UEs can support the HSDPA service using the common information.

Method for transmitting and receiving common information in a CDMA communication system providing HSDPA service

A method and apparatus are provided for frequency synchronization in an Orthogonal Frequency Division Multiplexing (OFDM) system, wherein the method includes the steps of transmitting OFDM symbols in such a manner that a data symbol size of a particular OFDM symbol in each frame is set to be smaller than a data symbol size of a typical OFDM symbol within the frame, receiving the OFDM symbols and calculating respectively, correlation coefficients of the particular OFDM symbol based on both a time interval of corresponding data symbols and a time interval of data symbols of the typical OFDM symbol, taking respectively phases of corresponding correlation coefficient calculated from the particular OFDM symbol and estimating a decimal part of a frequency offset, and determining an integer part of the frequency offset corresponding to the decimal part of the frequency offset, thereby estimating an entire frequency offset and acquiring the frequency synchronization.

Apparatus and method for frequency synchronization in OFDM system

A method and apparatus in a UE for detecting active channelization codes including channelization codes used by other UEs, which are different from at least one channelization code assigned to the UE, for transmission/reception to/from a Node B in an assigned time slot in a mobile communication system, where each of time slots of a radio channel frame is identified by a plurality of code channels, each having a unique channelization code. Accordingly, a channelization code set is formed to include a predetermined number of channelization codes to be searched, code channel data corresponding to the channelization codes is detected from a received signal, the code power of the code channel data is measured and compared with a predetermined threshold, and channelization codes having code power values exceeding the threshold are selected as active channelization codes.

Method and apparatus for detecting active downlink channelization codes in a TD-CDMA mobile communication system

A device and method for configuring an UL-DPCCH. One or more UL-DPCCHs, especially a UL-DPCCH for supporting HSDPA, are constructed in code division multiplexing and transmitted according to the characteristics of control information. The UL-DPCCH of the present invention that delivers various kinds of control information can be configured flexibly and operate in compatibility with a conventional asynchronous mobile communication system.

Method of transmitting control data in CDMA mobile communication system

A method and apparatus for sharing a DL-DPCH in an NB-TDD system. Two time slots at the same position in two subframes forming one radio frame are allocated as a DPCH for two UEs. A Node B arranges data and control information for the UEs in the two time slots and transmits the data and control information to the UEs. The UEs extract the data and control information from the two time slots and acquire the data and control information destined for the individual UEs.

Method and apparatus for sharing a downlink dedicated physical channel in a narrow-band time division duplexing system

A signaling method between a MAC (Medium Access Control) layer entity of a transmission apparatus and a MAC layer entity of a reception apparatus in a packet communication system including the transmission apparatus and the reception apparatus wherein upon receiving a signaling request, the MAC layer entity of the transmission apparatus transmits a MAC signaling message including control information and a signaling indication indicating transmission of the control information and the MAC layer entity of the reception apparatus determines whether the MAC signaling message includes the signaling indication, and receives the control information included in the MAC signaling message, if the MAC signaling message includes the signaling indication.

Signaling method between MAC entities in a packet communication system

A joint detection reception apparatus and method, which are utilized irrespective of a length of an orthogonal code in a TD-CDMA communication system. The joint detection reception method for creating a system matrix associated with a joint detection receiver in the same time slot includes the steps of a) repeating and partitioning individual channelization codes having variable lengths, and creating channelization code blocks having the same lengths, b) performing a convolution operation between the repeated and partitioned channelization code blocks and a channel impulse response, and acquiring combined impulse responses, c) grouping the combined impulse responses to construct sub-block matrices for a joint detection system, d) arranging the sub-block matrices for the joint detection system to be shifted by a predetermined column distance, and constructing a joint detection system matrix, and e) extending the joint detection system matrix to a squared-format matrix to create a block-circulant squared matrix.

Apparatus and method for joint detection receiving irrespective of orthogonal code length in mobile communication system

A method for providing soft handover in a code division multiple access mobile communication system supporting multicast multimedia broadcast service. In an asynchronous mobile communication system supporting an MBMS service, when a UE moves to a region where it can receive data from a plurality of Node Bs, soft handover is performed on the UE. Thus, even though an MBMS user moves from an existing cell to a new cell, a stable MBMS service is provided. Furthermore, the UE can soft-combine data received from a plurality of Node Bs.

Soft handover method for multimedia broadcast/multicast service in a CDMA mobile communication system

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Yongin-shi, South Korea

Jin-Weon Chang