초록 ▼

Bandwidth is adaptively allocated in an upstream channel of a layered data communication network such as that used for carrying messages from a number of subscriber units (250, 252, . . . , 254) to a central controller (210), for example, to allow the subscriber units to send data for Internet acces

Bandwidth is adaptively allocated in an upstream channel of a layered data communication network such as that used for carrying messages from a number of subscriber units (250, 252, . . . , 254) to a central controller (210), for example, to allow the subscriber units to send data for Internet access, videoconferencing, or voice communication. A running total of unallocated bandwidth (BWA(j)) is maintained in successive control intervals. A traffic count (C(i)) is determined for each subscriber unit by measuring the bandwidth which is used, for example, by counting the number of slots used in a control interval. The assigned bandwidth (B(i)) of the subscriber units is then adjusted when a ratio (K) of the traffic count to the assigned bandwidth is at or below a lower threshold (T1), and the running total of unallocated bandwidth is incremented by the decrease in the assigned bandwidth. The assigned bandwidth may be increased when a ratio (K) of the traffic count to the assigned bandwidth is at or above an upper threshold (T2) by distributing the unallocated bandwidth among the subscriber units. A subscriber unit hierarchy may be used to grant priority to selected users.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for allocating bandwidth in a layered data communication network in which a plurality of subscriber units communicate with a central controller, comprising the steps of:maintaining a running total of unallocated bandwidth in successive control intervals;determi

[ What is claimed is:] [1.]1. A method for allocating bandwidth in a layered data communication network in which a plurality of subscriber units communicate with a central controller, comprising the steps of:maintaining a running total of unallocated bandwidth in successive control intervals;determining a traffic count of each of said subscriber units;adjusting an assigned bandwidth of said subscriber units according to said traffic count; andmodifying said running total of unallocated bandwidth according to the adjustment in the assigned bandwidth; wherein:bandwidth is allocated in at least one of (a) a transmission path between said subscriber units and said central controller, and (b) a transmission path between said central controller and another communication network.