Provided is a device and Method for controlling access to channels where a base Station reserves a specific Access slot for a mobile station when the mobile station has Data to tRansmitir above a Frame length.Access to the Base Station receives channel information of a mobile station by a reverse access channel; and examines a length of Data TransmissionAccess to the channel information included in the received Data, to determine whether detransmisi on continue in at least a subsequent Frame.And reserve a slot specific entry in the reverse access channel to the mobile station via a one-way access channel when data are still in the menosunmarco subsiguie nte.
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