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Method for switching and managing frequency access in cognitive radio system, base station and subscriber station using the same

一种认知无线电、基站的技术，应用在无线通信、电气元件、多个站之间的通信等方向

Active Publication Date: 2013-02-27
ELECTRONICS & TELECOMM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is possible to continue communication by re-establishing interrupted reception / transmission of data

Method used

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  • Method for switching and managing frequency access in cognitive radio system, base station and subscriber station using the same
  • Method for switching and managing frequency access in cognitive radio system, base station and subscriber station using the same
  • Method for switching and managing frequency access in cognitive radio system, base station and subscriber station using the same

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Embodiment Construction

[0058] Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

[0059] Traditionally, a fixed communication system has been established between base stations and client terminal equipment by using allowable frequencies and fixed channel bandwidths. However, since frequency resources may be limited according to time and location, there is a demand for efficiently supplying idle frequency resources to locations where there are requirements. Specifically, since permitted frequency resources are not always used in low population density areas or low frequency communications (for example, in public safety channels), the waste of frequency resources may be more serious. A cognitive radio system designed to solve these problems is a communication system whereby frequency resources are effectively used by searching for frequency bands available at a desired time period and desired place and allocating them...

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Abstract

Provided are a channel switching method for effectively performing channel switching in a cognitive radio system while protecting an incumbent user, a method of managing a frequency channel, and a base station and customer premises equipment (CPE) using the methods. In the channel switching method performed by the base station, a currently unavailable first frequency channel is detected from among at least one uplink / downlink frequency channel which is set as a communication channel with the CPE; a channel switching request message requesting switching from the first frequency channel to a second frequency channel is transmitted to the CPE; and the first frequency channel is switched to the second frequency channel when a channel switching report message reporting that channel switching is to be performed in response to the channel switching request message is received from the CPE.

Description

Technical field [0001] The present invention relates to a method for switching and managing frequency access in a cognitive radio system, and a base station (BS) and customer terminal equipment (CPE, a kind of user equipment) using the method, and more specifically, to allowing BS or CPE A method for determining whether the set frequency channel (frequency access) is available, a channel switching method for switching from a detected frequency channel determined to be unavailable to another frequency channel, and a method for allowing the BS or CPE to effectively manage the frequency channel . Background technique [0002] The present invention exchanges BS when the base station (BS) or customer terminal equipment (CPE) determines that the communication channel being used is unavailable in the cognitive radio system due to the access of the current user, multipath fading, or other channel deterioration. The MAC layer control message with the CPE switches from the frequency chann...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26
CPCH04W72/0413H04W16/14H04W36/06H04W72/21H04W72/0453
Inventor 高光进黄貹铉康法周姜忠求金日焕金昌周宋明善
Owner ELECTRONICS & TELECOMM RES INST