Yonsei University

Samsung Electronics Co., Ltd.

Agency for Defense Development

Jee Min Kim

Seong-Lyun Kim

Han Moe Cha

Young Wan Seo

Eun Seok Choi

Seong Lyun Kim

Seung-Woo Ko

Kang Il Chung

Hye Sung Kim

Dong Wook Han

Jin Hyuk Hong

Se Jung Whang

Sang Cheon Park

Young Taek Hong

Disclosed is a control device for determining cognitive radio terminals. The device comprises: a spectrum sensing information storage unit for receiving and storing interference amount information for each frequency from spectrum sensing devices; a communication success probability calculation unit for receiving position information from secondary user terminals within a network and calculating a communication success probability of each secondary user terminal; a reinforced learning unit for setting the communication success probability as an initial access probability for each of the secondary user terminals and enabling learning such that an access probability, a state function, and a utility function are updated for each of the secondary user terminals at each iteration; and a cognitive radio terminal determining unit for, when the leaning is completed in the reinforced learning unit, selecting a secondary user terminal to execute cognitive radio communication on the basis of a final access probability.

Cognitive radio communication control device for determining cognitive radio terminal and cognitive radio terminal determining method

Provided is a device for allocating a dynamic frequency for a secondary user in a cognitive radio network. The device includes: an OP map generation unit for generating an opportunity map, which represents a probability of successful communication of the secondary transmitter in each region of the cognitive radio network, by using one or more of spectrum sensing information, which is received from a spectrum sensor that has completed sensing and includes identifier information, location information, and a sensing measurement matrix, an access request message, which is received from the secondary transmitter and includes identifier information, location information, and operable band information, and the density and transmission powers of primary transmitters; and a response message generation unit for generating a response message, which includes the channel having the highest probability of successful communication and the probability of successful communication, based on the generated map.

Method and device for allocating dynamic frequency for secondary user in cognitive radio network

Provided is a method of determining a node location in a cognitive radio network environment in which data is transmitted from a first node to a third node via a second node. The method includes information requesting wherein the first node transmits an information request signal to a plurality of second nodes in a preset segmented region; information receiving wherein the first node receives, from the second nodes, location information and frequency resource information for each second node corresponding to the transmitted information request signal; and segment determining wherein the first node determines one segment in the segmented region based on the received location information and frequency resource information.

Method of determining node location in cognitive radio network environment and node location determination device for implementing the method

A display device includes a display, a first sensor sensing movement, a second sensor sensing illuminance, and a processor operatively connected with the display, the first sensor, and the second sensor. The processor is configured to operate in a first mode or a second mode. The first mode is a mode in which a dynamic image is displayed in the display and the second mode is a mode in which a static image is displayed in the display. The processor sets a first critical time for sensing the movement based on the illuminance. If specified movement of a user is sensed in the second mode within the first critical time, the processor controls the display to display the static image.

Display device and method for operating a plurality of modes and displaying contents corresponding to the modes

Growing community of inventors

Seoul, South Korea

Jee Min Kim