Scheduling of upstream traffic in a TDMA wireless communications system
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United States of America Patent
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Dec 2, 2003
Grant Date -
N/A
app pub date -
Oct 29, 1999
filing date -
Oct 29, 1999
priority date (Note) -
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Abstract
A method of allocating bandwidth for transmitting upstream cells from a CPE unit to a BTS. The CPE determines arrival time information associated with each cell and sends arrival time information associated with at least one cell to the BTS. The BTS allocates future bandwidth to the CPE as a function of the arrival time information received from the CPE. For example, the BTS estimates the number of cell arrivals occurring in the current scheduling period based on past cell arrival times. The BTS then sends information to the CPE in which the allocated future bandwidth is specified. Finally, the CPE groups a number of cells into a burst packet occupying the allocated bandwidth and sends the burst packet to the BTS. Rather than respond in a delayed manner to a bandwidth deficiency or surplus at an individual CPE unit, the BTS produces an estimate of a CPE unit's bandwidth demands, resulting in more efficient bandwidth utilization and reduced cell loss ratio.
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