Importance

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Abstract

An improved transmission control method for use in a network which includes a time division multiplexing channel and a contention control channel. At least one station and a central control unit are connected both to a contention control channel and a time division multiplexing (TDMA) channel. When a station starts a time division multiplexing session, it transmits an access request to the central control unit via the contention control channel. After the central control unit receives the access request, the station which transmitted the access request is included in the order of the time division multiplexing (TDMA). The central control unit repeatedly transmits a transmission permitting token to the station via the TDMA channel in accordance with the order of the time division multiplexing. The station which received the transmission permitting token transmits the data entity, if existing, to either the other station or the central control unit via the second communication channel, and also transmits a transmission terminating token to the central control unit via the second communication channel. When the central control unit receives the transmission terminating token, it transmits the transmission permitting token via the second communication channel to the next station in the order of the time division multiplexing.

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First Claim