移動通信システムの災害時における縮退運用を行う無線基地局及び,移動通信システム

Title:

移動通信システムの災害時における縮退運用を行う無線基地局及び,移動通信システム

Document Type and Number:

Japanese Patent JP4672774

Kind Code:

B2

Abstract:

A mobile communication system prevents the reduction of large communication range even during disasters. A wireless base station includes a communication unit allocates frequency bands and output powers corresponding to distribution areas of wireless terminals, and performs communication with the wireless terminals. The communication unit uses a modulation method with a large number of multiple values to perform communication with wireless terminals in an area with small distribution area in proximity to the center of the cell area, and uses modulation methods with successively smaller numbers of values to perform communication with wireless terminals in larger distribution areas moving toward the peripheral regions of the cell area, and during a disaster, uses a modulation method with the smallest to perform communication over all distribution areas, sets the output power to the lowest value in communication with wireless terminals in an area with small distribution area in proximity to the center of the cell area, and sets the output power so as to increase gradually in communication with wireless terminals in larger distribution areas moving toward the peripheral regions of the cell area.

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Inventors:

Koyo Ono

Application Number:

JP2008536263A

Publication Date:

April 20, 2011

Filing Date:

September 28, 2006

Export Citation:

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