Samsung Electronics Co., Ltd.

Industry-University Cooperation Foundation Sogang University

Yonsei University

Sungkyunkwan University

Beijing Samsung Telecom R&d Center

Eun-Taek Lim

Dong-seek Park

Cheng Shan

Jung-Soo Woo

Yong-Ho Park

Young-Bin Chang

Geun-Ho Lee

Sang-Bum Kim

Young-Kwon Cho

Joon-Young Choi

Pan-Yuh Joo

Chang-Yoon Oh

Jaehyuk Jang

Do-Young Kim

Jung-Min Ro

Hyun-Jeong Kang

Sung-Jin Lee

Jae-Weon Cho

Ho-dong Kim

Hyoung-Kyu Lim

Mi-Hyun Lee

Jin-Kyu Koo

Kathiravetpillai Sivanesan

Qi Wu

Chang-Ho Suh

Petar Popovski

Ju-Yeon Song

Jae-Ik Park

Tae-Young Kim

Hyeon-Woo Lee

David Mazzarese

Chung-Gu Kang

Sung-Kwon Hong

Young-Kyun Kim

Elisabeth De Carvalho

Jun-Young Jung

Hiroyuki Yomo

Deok-Ki Kim

Zongchuang Liang

Jae-Yoel Kim

Jae-Yeon Song

Jung-Je Son

Sang Bum Kim

Chi-Woo Lim

Seung-Hoon Park

Ho-Kyu Choi

Su-Ryong Jeong

Sung-Eun Park

Hak-Ju Lee

Sung-ryul Yun

Ho-Dong Kim

Taori Rakesh

Ki-Ho Jung

Dong-Seek Park

Il-Hwan Kim

Yoon-Sun Lee

Shan Cheng

Il-Whan Kim

Soon-Mi Cho

Jae-Hyuk Jang

Dong-In Kim

Kyoung-Youp Park

Woo-Jin Shin

Muhammad Imadur Rahman

Soo-Yong Choi

Ramjee Prasad

Frank Hanns Paul Fitzek

Ragnar Viôir Reynisson

Megumi Kaneko

Simone Frattasi

Pah-Yuh Joo

Ho Dong Kim

A method of and apparatus for operating a Coexistence Beacon Protocol (CBP) packet transmitter in a Cognitive Radio (CR)-based wireless communication system is provided. The method includes, identifying a Self-Coexistence Window (SCW) regular pattern of neighbor Wireless Regional Area Networks (WRANs), if vacant SCW slots are not periodically occurring, selecting a WRAN as a contender among the neighbor WRANs, performing a contention for transmitting the CBP packet with the contender within SCW slots that are occupied by the WRAN, and configuring an SCW usage pattern so that an SCW usage period of the CBP packet sender is double that of an SCW usage period of the contender when winning in the contention.

Apparatus and method for transmitting coexistence beacon protocol packet in cognitive radio based wireless communication system

A method and apparatus for switching operational modes in a Cognitive Radio (CR) system are provided. A method for switching between a normal operation mode and a coexistence operation mode in a CR system includes occupying at least one channel in the normal operation mode, when there is no channel to be occupied, selecting at least one channel for the coexistence operation mode, and occupying available frames among frames of the selected at least one channel in the coexistence operation mode.

Method and apparatus for switching operational modes in a cognitive radio system

An apparatus and operation method of a Base Station (BS) for allocating a radio resource in a Cognitive Radio (CR) wireless communication system includes, when a licensed system is activated, determining whether each of User Terminals (UTs) located in a cell satisfies Quality of Service (QoS). If all of the UTs satisfy the QoS, a binary message indicating 'on' is broadcasted to neighbor BSs. If at least one of the UTs does not satisfy the QoS, a binary message indicating 'off' is broadcasted to the neighbor BSs, and when the binary message indicating &#x2018;off&#x2019; is received from at least one of the neighbor BSs, the binary message indicating &#x2018;off&#x2019; is broadcasted to the UTs.

Apparatus and method for semi distributed resource allocation in a cognitive radio wireless communication system

A method and apparatus for synchronizing a Quiet Period (QP) in a Cognitive Radio (CR) system includes receiving QP information based on a channel N from at least one neighbor BS. The method further includes determining whether the channel N is an in-band channel. If the channel N is the in-band channel, QP scheduling is performed according to the received QP information based on the channel N.

Method and apparatus for synchronizing quiet period in cognitive radio system

A method for forwarding direct message in partial function OFDMA relay system is proposed in present invention. In present invention, the operations like forwarding and reflecting are fixed for the PFRS. Therefore, the BS performs scheduling according to the fixed operations so as to make the PFRS actually has the function of direct message forwarding.

Method for forwarding direct message in partial function OFDMA relay system

A method is provided for performing handoff in a communication system including a serving base station (BS) in communication with a mobile station (MS), at least one neighbor BS using a communication scheme different from a communication scheme of the serving BS, and the MS capable of communicating with the neighbor BS. The method includes compensating a signal strength of one of the serving BS and the neighbor BS, received at the MS, such that handoff decision is possible, and determining whether to perform a handoff of the MS, using the compensated signal strengths.

Apparatus and method for performing handoff in a communication system

A wireless communication system using multiple channels is provided. An apparatus includes an allocator for, when bursts are allocated to an Accessing Terminal (AT) which utilizes a plurality of channels at the same time, allocating the same amount of the bursts to each channel in use; a generator for, when a map message to be transmitted in a primary channel of the AT is generated, generating the map message which comprises allocation information of the bursts allocated to the AT; and a transmitter for transmitting the map message in the primary channel of the AT.

Apparatus and method for allocating bursts in a broadband wireless communication system

Provided are an apparatus and a method for transmitting a CBP packet for communication information sharing between base stations in a CR-based wireless communication system. In the method, a CBP packet including a CBP identifier is transmitted to a base station of adjacent cells via one SCW slot. A CBP identifier list for successfully received CBP packets is received from the base station of the adjacent cells. When the CBP identifier is included in the CBP identifier list, the SCW slot is occupied.

Apparatus and method for transmitting coexistence beacon protocol packet in cognitive radio-based wireless communication system

An apparatus and method for transmitting Coexistence Beacon Protocol (CBP) in a cognitive radio system are provided. The apparatus includes a detector, a controller, and a transmitter. The detector scans channels on which neighboring Base Stations (BSs) operate through a plurality of directional antennas. The controller links the plurality of directional antennas with BSs, respectively. The transmitter receives a CBP packet through the directional antenna linked with the BS, and transmits the received CBP packet to at least one or more other BSs linked with at least one or more other directional antennas.

Apparatus and method for transmitting coexistence beacon protocol in a cognitive radio system

A base station includes an apparatus and a method for exchanging frequency channel resources between base stations in a Cognitive Radio (CR) based communication system. A requesting Base Station (BS), which requests channel exchange a neighboring BS, receives a channel advertisement message from a neighboring BS and sends a channel exchange request message to the neighboring BS. The channel exchange request message includes at least one of a neighbor BS Identifier (ID), a requesting BS ID, channel information for the channel exchange at the requesting BS, and channel information exchangeable at the neighboring BS. The requesting BS receives a channel exchange response message from the neighboring BS in response to the channel exchange request message, determines whether to execute a channel exchange process to the neighboring BS based on information in the received channel exchange response message, and sends a channel exchange reply message indicative of the determination result.

Apparatus and method for dynamic resource exchange in cognitive radio (CR) based communication system

An apparatus and a method for transmitting a Coexistence Beacon Protocol (CBP) packet in a Cognitive Radio (CR) wireless communication system are provided. In the method for transmitting CBP packet in a transmitter that operates in a scalable Orthogonal Frequency Division Multiple Access (OFDMA) mode, a priority is given to each channel of one or more channels based at least partly upon channel use statuses of two or more neighbor Wireless Regional Area Networks (WRANs). Whether a Quality of Service (QoS) for CBP packet transmission for each channel is met is sequentially determined according to the respective priority. A channel having a highest priority is selected from the one or more channels meeting the QoS as a channel for CBP packet transmission. A CBP packet is transmitted via the selected channel.

Apparatus and method for transmitting coexistence beacon protocol packet in cognitive radio wireless communication system

A system and method for transmitting downlink schedule in a WiMax/WiBro relay system is proposed in present invention. In present invention, the task of transmitting the schedule is dispersed from the BS to both of the BS and RS so that several RS may transmit the schedule items simultaneously and therefore the resource of the system is saved.

System and method for transmitting downlink schedule in WiMax/WiBro relay system

A frame structure, a method, and an apparatus for inter-frame resource sharing in a Cognitive Ratio (CR) communication system are provided. An apparatus for sharing a channel in an environment where a plurality of CR communication systems coexist, constitutes a Superframe Control Header (SCH), in one superframe, that includes a frame allocation MAP for frame information allocated to a Base Station (BS), with respect to each BS, and transmits and receives the SCH at the start frame of the frames allocated to the BSs.

Method and apparatus for frame based resource sharing in cognitive radio communication system

Provided are an apparatus and a method for providing a concurrent data service to an Mobile Station (MS) through a plurality of heterogeneous networks. In a method for providing a data service to an MS through different wireless networks, the MS measures channel qualities of at least one accessible wireless network and reports the measured channel qualities to an Internet Protocol (IP) packet controller. The IP packet controller selects wireless networks for data transmission on the basis of the reported channel qualities, distributes data destined for the MS, and transmits the distributed data to the selected wireless networks. The selected wireless networks receive the data from the IP packet controller and transmits the received data to the MS. The MS combines and interprets the data received from the selected wireless networks. Accordingly, it is possible to provide a seamless data service to the MS in service environments with a mixture of different wireless communication systems.

Data service apparatus and method in heterogeneous wireless networks

A wireless communication system based on a Cognitive Radio (CR) is provided. A method includes checking channels unused by a licensed system through a spectrum sensing; selecting one of the channels unused by the licensed system as a control channel based on a channel quality per channel; and transmitting control information to terminals within a cell over the control channel.

Apparatuses and methods for transmitting and receiving control information in a wireless communication system based on Cognitive Radio (CR)

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Suwon-si, South Korea

Eun-Taek Lim