光伝送システム

Light transmission system

Abstract

【課題】複数のサービスを一括して提供することが可能な無線信号を光伝送するための光伝送システムを低コストで提供する。 【解決手段】親局と、アンテナを有する少なくとも一つの子局と、親局と子局とをつなぐ光ファイバとを備え、親局は、無線信号に含まれている複数のサービスから特定のサービスエリア向け又は特定の移動体通信端末向けのサービスに関する信号を抽出する信号抽出部と、抽出された信号を増幅する増幅部と、増幅部から出力される信号を電気から光へ変換する電気/光変換部とを備え、子局は、電気/光変換部から出力される光信号を光から電気へ変換する光/電気変換部と、光/電気変換部から出力される電気信号を無線エリアへ向けて送出する送信部とを備える。 【選択図】図1
<P>PROBLEM TO BE SOLVED: To provide a light transmission system at a low cost for carrying out optical transmission of a radio signal which can provide two or more services collectively. <P>SOLUTION: The system is provided with a key station, at least one slave station which has an antenna and an optical fiber which connects the key station and the slave station. The key station has a signal extraction part which extracts a signal about a service for a specific service area or a specific mobile communication terminal from two or more services included in the radio signal, an amplifying section which amplifies the extracted signal, and an electric/optical transformation portion for transforming a signal outputted from amplifying section from electricity to light. The slave station has the optical/electric transformation portion for transforming to electricity from light about the optical signal outputted from the electric/optical transformation portion and a transmitting portion for sending out an electrical signal outputted from the optical/electric transformation portion to the radio area. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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    Publication numberPublication dateAssigneeTitle
    JP-2009065569-AMarch 26, 2009Chubu Electric Power Co Inc, Toshiba Corp, 中部電力株式会社, 株式会社東芝Relay device, and radio communication apparatus