Samsung Electronics Co., Ltd.

Nokia Solutions and Networks Oy

Jae-Chon Yu

Hwan-Joon Kwon

Dong-Hee Kim

Jin-Kyu Han

Yeon-Ju Lim

Yu-Chul Kim

Byung-Sik Kim

Seung-Kyun Oh

Kyung-Joo Suh

Jae-Hyun Park

Jung-Soo Jung

Beom-Sik Bae

Joon-Young Cho

Ju-Ho Lee

Zhouyue Pi

Seung-Hoon Choi

Youn-Hyoung Heo

Hyeon-Woo Lee

Dong-Hoo Kim

Hwan Joon Kwon

Aydin Sezgin

Anastasios Giovanidis

Dae-Gyun Kim

Methods and apparatuses are provided for receiving control information by a terminal. A control channel message is received on a control channel. Control information comprising a transmission rank and precoding matrix information is extracted from the control channel message if a common pilot is used for data demodulation. The control information comprising the transmission rank and information about a dedicated pilot is extracted from the control channel message if the dedicated pilot is used for the data demodulation.

Method and apparatus for managing control channel in a mobile communication system using multiple antennas

Methods and apparatus are provided for transmitting data in a communication system with a plurality of antennas. The transmitter generates a first pilot signal and a second pilot signal. Data, the first pilot signal, and the second pilot signal are transmitted over a wireless network. The first pilot signal is transmitted at a first position in a time domain in each transmission time interval of the data over each frequency in a frequency domain used to transmit the data, and the second pilot signal is transmitted at a second position known by the transmitter and a receiver in the time domain and the frequency domain of a transmission time interval.

Transmission/reception apparatus and method for supporting MIMO technology in a forward link of a high rate packet data system

Methods and apparatus are provided for transmitting and receiving data in a wireless communication system. Resource allocation information is received and hopping-related information is identified. A resource for transmitting data is determined based on the resource allocation information and hopping-related information, and data is transmitted on the determined resource. A sub-band is determined from a plurality of sub-bands based on the first hopping parameter and a resource in the determined sub-band is determined based on the second hopping parameter.

Apparatus and method for performing resource allocation and communication in a wireless communication system, and system using same

Methods and apparatuses are provided for transmitting feedback information in a communication system supporting multiple transmission methods with multi antenna transmission. Information for a default Multiple Input Multiple Output (MIMO) mode is received. It is determined whether the default MIMO mode is a Single-User MIMO mode or a Multi-User MIMO mode based on the information for the default MIMO mode. First Channel Quality Indicator (CQI) feedback information is calculated for one of the Single-User MIMO mode and the Multi-User MIMO mode determined as the default MIMO mode. The first CQI feedback information and DELTA CQI feedback information, which is a differential value between the first CQI feedback information and second CQI feedback information for a non-default MIMO mode, are transmitted.

Method and apparatus for transmitting/receiving feedback information in a wireless packet data communication system

Methods and apparatuses are provided for receiving control information by a terminal. A control channel message is received on a control channel. Control information is extracted from the control channel message. The control information includes a transmission rank and precoding matrix information if a common pilot is used for data demodulation. The control information includes the transmission rank and information about a dedicated pilot if the dedicated pilot is used for the data demodulation.

Methods and apparatuses are provided for transmitting data in a mobile station of a wireless communication system. Hopping information including a number of sub-bands and a size of a sub-band is identified. Resource allocation information is identified. A resource index is determined for transmitting the data based on the resource allocation information, and determining a resource index change in a unit of a sub-band, a resource index change in a unit of a resource unit, the number of sub-bands, and the size of the sub-band. The data is transmitted using the determined resource index. Each sub-band includes at least one resource unit, and each resource unit includes a plurality of subcarriers.

Method and apparatus for multiplexing frequency hopping in a communication system

The present invention relates to a security control method and device for emergency calls in a mobile communication system, and the security control method in a mobile communication system supporting emergency calls according to an embodiment of the present invention comprises: a step in which a terminal transmits a message containing terminal security capabilities to a source network during handover in an emergency call; a step in which a mobility manager of the source network transmits, to a mobility manager of a target network, the message containing terminal security capabilities; a step in which the mobility manager of the target network transmits, to a base station of the target network, a hand-over request message containing the terminal security capabilities; and a step in which, after the hand-over preparation procedure has been completed, a base station of the source network transmits, to the terminal, a hand-over command message containing the terminal security capabilities.

Security control method and device in a mobile communication system supporting emergency calls, and a system therefor

Methods and apparatus are provided for transmitting and receiving data in a communication system with a plurality of antennas. A method includes informing information related to a transmission time interval for transmission based on a second type reference signal; and transmitting data based on the second type reference signal in the transmission time interval defined by the information related to the transmission time interval for transmission based on the second type reference signal. The transmission time interval defined by the information related to the transmission time interval for transmission based on the second type reference signal is located on a fixed position within a period including a plurality of transmission time intervals.

Methods and apparatus are provided for transmitting and receiving uplink data in a wireless communication system. Hopping-related information is received at a mobile station from a base station. Resource allocation information is received at the mobile station from the base station. The uplink data is transmitted from the mobile station to the base station through at least one resource determined based on a sequence for sub-band hopping and a sequence for local hopping.

Methods and apparatuses are provided for transmitting control information to a terminal, by a base station, in a Multiple Input Multiple Output (MIMO) mobile communication system. The control information is generated including a field indicating either a precoding scheme or a pilot format according to a type of pilot used for data demodulation in the terminal. The control information is transmitted to the terminal.

A Channel Quality Indicator (CQI) expression and feedback method prevents an excessive increase in the CQI feedback overhead while supporting both Single-User MIMO and Multi-User MIMO operations. When a default MIMO operation is set to Single-User MIMO or Multi-User MIMO, an access network can receive MIMO CQI feedback optimized for the corresponding MIMO operation. However, when a scheduler has selected an alternative MIMO operation other than the default MIMO operation, the access network calculates a CQI necessary for the alternative MIMO operation based on the default MIMO CQI feedback for the default MIMO operation and the DELTA CQI feedback for the alternative MIMO operation. In this manner, the invention enables the best operation in the default MIMO operation by providing a correct CQI, and enables the second best operation in the alternative MIMO operation. With use of the invention, the access network can dynamically select the Single-User MIMO and Multi-User MIMO operations, contributing to an increase in the resource management efficiency.

Methods and apparatuses are provided for transmitting and receiving data in a wireless communication system. Hopping information including at least a number of sub-bands is received. Resource allocation information is received. A resource for transmitting the data is determined based on the resource allocation information and the hopping information. The data is transmitted using the determined resource. The resource for transmitting the data is determined according to at least one of applying a change of a resource allocation within inter sub-bands and applying a change of the resource allocation within an intra sub-band. A sub-band includes at least one sub-channel, and one sub-channel includes a plurality of sub-carriers.

Disclosed is an adaptive partial frequency reuse method and system in a cellular mobile communication system. The adaptive partial frequency method includes the steps of: receiving interference feedback information transmitted from at least one terminal; determining if there is a terminal located in a cell boundary, based on the received interference feedback information; when there is the terminal located in the cell boundary, dividing the frequency band into multiple frequency sub-bands, and allocating different power to the respective multiple frequency sub-bands for each of the at least one base station; and providing data service to the terminal by using the power allocated the respective frequency sub-bands.

Growing community of inventors

Suwon-si, South Korea

Jae-Chon Yu