Samsung Electronics Co., Ltd.

Yonsei University

Seoul National University

Industry-University Cooperation Foundation Sogang University

Mi-Sun Do

Jung Min So

Rakesh Taori

Ki-Sun Oh

Hee Jung Byun

Jaiyong Lee

Hyun Jeong Kang

Jung-Min So

Jung-Hee Han

Sung-hyun Cho

Taori Rakesh

Hyon-Goo Kang

Hee-Jin Jang

Youn-hee Han

Young-Jun Park

Jong-Ho Bang

Seong-Lyun Kim

Yongsuk Park

Eunhyun Kwon

Hee-Jung Byun

Sunggook Lim

Kyeong-In Jeong

Yung-Soo Kim

Sang-Hoon Lee

June Hwang

Jung Min Park

Ki-Young Han

Young-Doo Kim

Sung Jin Lee

Hwa-Jin Cha

Sung Jin Kim

Neung-Hyung Lee

Bong-Jhin Shin

Xiaoyu Liu

Sae-Woong Bahk

Seung-Mok Shin

Seung-young Park

Byoung-Gi Jang

Jongho Bang

Seung Mok Shin

Jai Yong Lee

Sang-Hoon Oh

Young-June Choi

Dae-Hyoung Hong

Jang-Woo Son

Ga-Hee Lee

Young Bin Chang

Yong-Shin Cho

Hun Je Yeon

Seung Woo Ko

A relay including a receiver to receive from a base station, data, a first data frame, and a second data frame, the first data frame includes data and data transmission time information associated with the data, and the second data frame includes map information corresponding to the data and map information transmission time information associated with the map information; a data frame computation unit to compute a third data frame and a fourth data frame, wherein the third data frame is used to transmit the data to a terminal and the fourth data frame is used to transmit the map information to the terminal; and a transmitter to transmit the data to the terminal using the map information when the third data frame is the same as the fourth data frame.

Data transmission system for asynchronous transmitting data and map information

A communication system and a communication method using relay terminals are provided. A communication system includes a base station, a target terminal transmitting uplink data to the base station or receiving downlink data from the base station, and a plurality of relay terminals cooperatively relaying the uplink data/downlink data to the base station/target terminal, the plurality of relay terminals being grouped into at least one group.

Communication system and communication method using relay terminals

A system for controlling a station operation mode is provided. The system for controlling a station operation mode, including: a distance information generation unit measuring a distance between a first communication station and a second communication station and generating distance information; a distance information comparison unit comparing the distance information and a predetermined threshold distance; and an operation mode determination unit determining any one of an active mode and an idle mode as an operation mode of the second communication station, based on a comparison result of the distance information comparison unit.

Method and system for controlling station operation mode

Provided are a method of providing neighbor information and a method of generating neighbor location information. The method of providing neighbor information includes a base station broadcasting a neighbor advertisement message; and the base station transmitting a neighbor information message to a relay station connected to the base station.

Method of providing neighbor information and method of generating neighbor location information

A communication system using a hierarchical modulation scheme and/or a network coding scheme is provided. A relay node included in the communication system may generate a relay packet by applying a network coding scheme to a hierarchically modulated source packet and to a destination packet received from a destination node. The relay packet is transmitted to a source node and a destination node, and the source node and the destination node may extract a desired packet from a relay packet. The communication system also may adaptively determine an optimal communication mode.

Communication system using hierarchical modulation scheme or network coding scheme

A wireless communication system includes an apparatus capable of detecting whether a cell coverage is downscaled. The wireless communication system receives information used for communication between an evolved NodeB (eNodeB) and a User Equipment (UE) from the eNodeB. The UE performs at least one of pilot signal power checking for checking if a pilot signal power falls within a first reference range, DownLink (DL) Signal-to-Interference plus Noise Ratio (SINR) checking for checking if an SINR of a DL traffic channel falls within a second reference range, and UpLink (UL) SINR checking for checking if an SINR of an UL traffic channel falls within a third reference range using the received information. The UE also detects whether a cell coverage of a cell to which the eNodeB and the UE belongs is downscaled based on a checking result.

Method and apparatus for detecting whether cell coverage is downscaled in wireless communication system

A system and method for providing a multicast/broadcast service (MBS) using a Wireless Broadband Internet/World Interoperability for Microwave Access (WiBro/WiMAX) network are provided, which include an MBS control unit for generating a beginning and an end of an MBS bearer session, a quality of service (QoS) control unit for requesting an allocation and release of a QoS, an access control router (ACR) for allocating a multicast service flow identifier (SFID) with respect to the MBS bearer session in order to provide an MBS user terminal with MBS bearer traffic which is received from an MBS content source, and for releasing the allocated multicast SFID when the release of the QoS is requested, and a radio access station (RAS) for allocating a multicast connection identifier (CID) corresponding to the allocated multicast SFID according to whether an MBS user requests the MBS bearer traffic, and controlling a radio resource with the MBS user terminal.

Method of providing multicast/broadcast service using WiBro/WiMAX network and system using the method

A method and apparatus optimize handover optimization in a broadband wireless communication system. Operations of a base station includes determining whether at least one of a plurality of time intervals included in a total time taken by handover, exceeds a threshold time. Whether to advance or delay a handover point is determined based on which at least one of the time interval exceeds the threshold time. And at least one handover parameter is changed to advance or delay the handover point.

Apparatus and method for handover optimization in broadband wireless communication system

A communication system, a relay station, a mobile station, a base station, and a method using a network coding scheme are provided. A communication system includes a relay station, a mobile station, and a base station. A relay station includes a message receiving unit to receive a downlink message transmitted from a base station and an uplink message transmitted from a mobile station, a message generation unit to generate a network coded message by coding the downlink message and the uplink message according to a network coding scheme, and a message transmission unit to transmit the network coded message to the base station and the mobile station during the same time slot.

Method and device for communicating using network coding scheme

A system and method for providing Multicast/Broadcast Service (MBS) service to a mobile terminal in an MBS service provisioning system in a Wide Area Network (WAN) network are provided. An authentication server sends a message for requesting resource reservation, in which a Quality-of-Service (QoS) policy is included, when a registration procedure of the mobile terminal is performed. A base station stores the message sent from the authentication server, forwards the message to the mobile terminal, and sets up a channel to the mobile terminal upon receiving from the mobile terminal a request for channel setup based on the QoS policy.

Method for providing MBS service in a WAN network, and system thereof

A method and apparatus allocates a Physical Cell Identifier (PCID) in a wireless communication system by considering a PCID reuse factor. An allowable PCID list is acquired from a server. A set of candidate PCIDs is determined from the allowable PCID list according to PCID allocation conditions. A received signal strength of each cell using the determined set of candidate PCID is determined. At least one PCID is selected by using a PCID reuse factor and the received signal strength of each of the cells using the determined set of candidate PCIDs.

Method and apparatus for allocating physical cell identifier in wireless communication system

A relay station, including a delay information storage unit to store remaining delay information generated in a path from a target relay node to a destination node; an order determination unit to determine an order of processing service packets with a plurality of quality of service (QoS) levels using the remaining delay information, the service packets being received from a neighbor node; and a processing unit to process the service packets in the determined order.

Relay station operated according to QOS level of service packet and method of operating relay station

A mobile telecommunication and joint resource allocation of a multiple-station and joint group handover. The mobile telecommunication system comprises a utility function processing unit to process a utility function that is a load factor of each cell, a critical set determining unit to determine a critical set based on the utility function, and a resource allocation processing unit to allocate a resource in association with another at least one mobile telecommunication system corresponding to the critical set.

Mobile telecommunication system and joint resource allocation method for multiple station joint resource allocation and joint group handover

A radio communication system and transmission method using Multi-Radio Access (MRA) interfaces are provided. The radio communication system and method include a transmitter and a receiver having at least two Radio Access (RA) interfaces capable of communicating through different frequency spectrums, in which each of the transmitter and the receiver includes a multiple radio transmission layer for activating a multiple radio transmission entity for each upper layer service and transmitting data in packet units and an RA layer for activating at least one RA entity that manages the RA interface for the multiple radio transmission entity and dividing a packet into sub-packets for transmission and reception. In the transmission method, the multiple radio transmission entity of the transmitter receives a packet transmission success indicator for a specific packet from the RA entity of the transmitter and a next packet is transmitted upon receipt of the packet transmission success indicator. In the transmission method, a link having a good channel status is selected as a retransmission channel according to the status of an RA link of the lower layer, thereby allowing efficient and rapid data transmission.

System and method for parallel transmission over multiple radio links

A method and apparatus for handling data error in a data transmission system including a relay station which receives a data from a transmission apparatus and transmits the data to a receiving apparatus is provided. A relay station which transmits, to a receiving apparatus, a data received from a transmission apparatus, the relay station including: a data receiver to receive the data from the transmission apparatus; an error detector to detect whether an error of the received data is generated; and a data transmitter to transmit the received data and an error generation indicator for the received data to the receiving apparatus when the error is generated. According to the present invention, it is possible to combine transmitted data with retransmitted data and decode error-free data by transmitting data including a generated error to a receiving apparatus when error is again generated in the retransmitted data.

Apparatus and method for handling data error in data transmission system including relay station

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Suwon-si, South Korea

Mi-Sun Do