Cognitive radio communication device using overlapped signal and method thereof

A communication device and signal technology, applied in the field of cognitive radio, can solve problems such as low efficiency and achieve the effect of maximizing data transmission rate

Inactive Publication Date: 2009-05-06
IND ACADEMIC COOP FOUNDATION YONSEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, it may be inefficient to set a longer sensing duration so that a communication device belonging to the secondary network detects the presence or absence of a signal of the primary network

Method used

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  • Cognitive radio communication device using overlapped signal and method thereof
  • Cognitive radio communication device using overlapped signal and method thereof
  • Cognitive radio communication device using overlapped signal and method thereof

Examples

Experimental program
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Embodiment Construction

[0022] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

[0023] figure 1 is a diagram showing an example of a primary network and a secondary network according to the present invention.

[0024] refer to figure 1 , the primary network includes a first base station and a first terminal, and the secondary network includes a second base station and a second terminal. At this time, the second base station and the second terminal can transmit / receive signals based on an Orthogonal Frequency Division Multiplexing (OFDM) scheme.

[0025] At this time, the cognitive radio communication device according to the present invention may be installed and operated in the second terminal or the second base station.

[0026] At this time, the second terminal or the second base station may use a cognitive radio technology (cognitive radio technology) to identify a part or all of the frequency resources a...

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PUM

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Abstract

Disclosed is a cognitive communication device. A cognitive radio communication device includes a signal receiving unit that receives a first signal of a primary network and a second signal of a secondary network, the second signal including two or more overlapped portions where the same signal is repeated; a status information generating unit that uses the sameness between signals included in the overlapped portions to generate status information related to whether the first signal exists; and an operational mode determining unit that determines a communication operational mode of a communication device belonging to the secondary network, on the basis of the status information.

Description

technical field [0001] The present invention relates to cognitive (congnitive) radio technology, and more specifically, to a cognitive radio communication device and method for determining whether a first signal of a primary network (primary network, main network) exists. Background technique [0002] In recent years, various studies have been actively conducted on techniques for effectively using limited frequency resources. Among them, cognitive radio (CR) technology has attracted attention. [0003] Cognitive radio technology is a technology that reuses limited frequency resources to maximize the use of frequency resources. That is, according to the cognitive radio technology, a communication device belonging to a secondary network (secondary network, secondary network) periodically or aperiodically senses unused frequency resources in the primary network to identify available frequency resources, and Data is transmitted / received using the identified available frequency...

Claims

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Application Information

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IPC IPC(8): H04W74/02H04B17/00H04B7/26
CPCH04W88/06H04W24/00H04W88/02
Inventor 洪大植卢高山李济敏王澣镐柳承珍
Owner IND ACADEMIC COOP FOUNDATION YONSEI UNIV
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