WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION METHOD

A wireless communication system (1) is provided with a plurality of wireless base stations (10-1 to 10-10), and is characterized in that: other than the highest-order wireless base station from among the plurality of wireless base stations, each of the wireless base stations (10-2 to 10-10) determin...

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Bibliographic Details
Main Authors MIYAKE, Yuji, AOYAMA, Tetsuya
Format Patent
LanguageEnglish
French
Japanese
Published 16.01.2020
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Summary:A wireless communication system (1) is provided with a plurality of wireless base stations (10-1 to 10-10), and is characterized in that: other than the highest-order wireless base station from among the plurality of wireless base stations, each of the wireless base stations (10-2 to 10-10) determines a frame timing on the basis of synchronization timing information notified from higher-order wireless base stations; other than the lowest-order wireless base station from among the plurality of wireless base stations, each of the wireless base stations (10-1 to 10-9) notifies the synchronization timing information to the lower-order wireless base stations; communication paths, which, from among the plurality of wireless base stations are directed from the highest-order wireless base station toward the lowest-order wireless base station, form a branch point and a junction point; a junction base station, which is the wireless base station (10-10) provided at the junction point, measures a synchronization error between a prioritized synchronization path (21), which is one of the plurality of communication paths extending from the branch point to the junction point, and a non-prioritized synchronization path (22) different from the prioritized synchronization path; and each of the wireless base stations (10-6 to 10-9) provided on the plurality of non-prioritized synchronization path (22) adjusts the frame timing on the basis of the synchronization error. L'invention concerne un système de communication sans fil (1) qui est pourvu d'une pluralité de stations de base sans fil (10-1 à 10-10), et est caractérisé en ce que : autre que la station de base sans fil d'ordre supérieur parmi la pluralité de stations de base sans fil, chacune des stations de base sans fil (10-2 à 10-10) détermine une synchronisation de trame sur la base d'informations de temporisation de synchronisation notifiées par des stations de base sans fil d'ordre supérieur ; autre que la station de base sans fil d'ordre inférieur parmi la pluralité de stations de base sans fil, chacune des stations de base sans fil (10-1 à 10-9) notifie les informations de temporisation de synchronisation aux stations de base sans fil d'ordre inférieur ; des chemins de communication, qui, parmi la pluralité de stations de base sans fil, sont dirigés depuis la station de base sans fil d'ordre supérieur vers la station de base sans fil d'ordre inférieur, forment un point de ramification et un point de jonction ; une station de base de jonction, qui est la station de base sans fil (10-10) disposée au point de jonction, mesure une erreur de synchronisation entre un chemin de synchronisation prioritaire (21), qui est l'un de la pluralité de chemins de communication s'étendant du point de ramification au point de jonction, et un chemin de synchronisation non prioritaire (22) différent du chemin de synchronisation prioritaire ; et chacune des stations de base sans fil (10-6 à 10-9) fournie sur la pluralité de chemins de synchronisation non prioritaires (22) ajuste la temporisation de trame sur la base de l'erreur de synchronisation. 複数の無線基地局(10-1~10)を備える無線通信システム(1)において、複数の無線基地局のうち最上位以外の無線基地局(10-2~10)は、上位の無線基地局から通知される同期タイミング情報に基づいてフレームタイミングを決定し、複数の無線基地局のうち最下位以外の無線基地局(10-1~9)は、下位の無線基地局に同期タイミング情報を通知し、複数の無線基地局のうち最上位の無線基地局から最下位の無線基地局に向かう通信経路は、分岐点および合流点を有し、合流点に設けられた無線基地局(10-10)である合流基地局は、分岐点から合流点に至る複数の通信経路のうちの1つである優先同期経路(21)と、優先同期経路と異なる非優先同期経路(22)との間の同期誤差を測定し、非優先同期経路(22)上に設けられた複数の無線基地局(10-6~9)のそれぞれは、同期誤差に基づいて、フレームタイミングを調整することを特徴とする。
Bibliography:Application Number: WO2018JP26206