Dynamic bandwidth assignment in an atm transmission system

H - Electricity – 04 – L

Patent

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Details

H04L 12/56 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2335943

The invention relates to a method and to an ATM (Asynchronous Transfer Mode) system with which bandwidth is dynamically assigned on the common air interface based on connection parameters, actual buffer levels of remote stations (1, 2), the transmission characteristics of the radio range and the strategies for assessing charges. Said bandwidth is assigned in such a way that the transmission volume of ATM-conformal traffic in the uplink direction of wireless point-to-multipoint configurations is optimized while taking these configurations and common boundary conditions into consideration. To this end, the invention provides a central station (3) and at least one remote station (1, 2) which can communicate with the central station (3) over a common air interface (4). Each remote station (1, 2) comprises a buffer (5) for data to be transmitted. Each remote station (1, 2) transmits level data which emulates the state of the buffer (5) of the respective remote station (1, 2) to the central station (3) via a control channel (13). The central station (3) comprises an arithmetic unit (10) which respectively calculates the bandwidth parameters for the individual remote station (1, 2) at least according to the transmitted level data. The central station (3) then assigns the bandwidth parameters to the individual remote stations (1, 2) over the control channel (13').

L'invention concerne un procédé ainsi qu'un système MTA (mode de transfert asynchrone) permettant d'affecter, sur la base des paramètres de communication, des niveaux de remplissage des tampons actuels des stations éloignées (1, 2), des caractéristiques de transmission de la section radio et des stratégies de taxation, des largeurs de bande sur l'interface radio, et cela de façon dynamique pour que le volume de transmission du trafic conforme au MTA dans le sens montant des configurations point-multipoint sans fil soit optimisé compte-tenu de ces configurations et d'autres conditions marginales. A cet effet, une station centrale (3) et au moins une station éloignée (1, 2) sont prévues, laquelle peut communiquer avec la station centrale (3) par l'intermédiaire d'une interface radio (4). Chaque station éloignée (1, 2) possède un tampon (5) pour les données à émettre. Chaque station éloignée (1, 2) transmet des données de remplissage qui reproduisent l'état du tampon (5) de la station éloignée (1, 2) respective, par l'intermédiaire d'un canal de commande (13) à la station centrale (3). Cette dernière présente une unité de calcul (10) qui calcule les paramètres de largeurs de bande respectivement pour les stations éloignées (1, 2) individuelles, au moins en fonction des données de remplissage transmises. La station centrale (3) affecte ensuite, par l'intermédiaire du canal de commande (13'), des paramètres de largeurs de bande aux stations éloignées (1, 2) individuelles.

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