Estimating non-uniform spatial offered loads in a cellular...

Telecommunications – Radiotelephone system – Zoned or cellular telephone system

Reexamination Certificate

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C455S452100, C455S422100

Reexamination Certificate

active

07072664

ABSTRACT:
Non-uniform spatial loads are estimated for a plurality of bins corresponding to a cellular wireless territory served by Base Station Transceivers (BTS's). Using means and standard deviation of signal strength received at each of the bins from each of the BTS's, probabilities are computed for each bin such that each of the BTS's will serve the bin. Using the computed probabilities and an estimated offered load for each BTS, which load is derived from carried load and call lost measurements at the BTS, a resource constraint is then expressed for each BDS in terms of the bin offered load estimates. Next, using an approximation of relative demand for wireless services across all bins, based, for example, on demographic data, a performance function is expressed for each bin in terms of the bin's estimated offered load. Using the performance function a lexicographic minimax objective function is defined, which is then coupled with the resource constraints to express an equitable resource allocation model. Finally, the optimal solution to the model is determined thereby providing the bin offered load estimates.

REFERENCES:
patent: 6094580 (2000-07-01), Yu et al.
K.I. Aardal, et al., “Models and Solution Techniques for Frequency Assignment Problems,” Konrad-Zuse-Zentrum fur Informationstechnik Berlin (ZIB), ZIB Report 01-40, Dec. 2001, pp. 1-59.
J.M Bourjolly, et al., “Canadian Telecom Makes the Right Call,” OR/MS Today, Apr. 2002, pp. 40-44.
H. Luss, “On Equitable Resource Allocation Problems: A Lexicographic Minimax Approach,” Operations Research, vol. 47, No. 3, May-Jun. 1999, pp. 361-378.
H. Luss, et al., “Resource Allocation Among Competing Activities: A Lexicographic Minimax Approach,” Operations Research Letters, vol. 5, No. 5, Nov. 1986, pp. 227-231.
H. Luss, et al., “A Resource Allocation Approach for the Generation of Service -Dependent Demand Matrices for Communications Networks,” Telecommunication Systems, 2001, 17:4, pp. 411-433.
W. Stallings, “Wireless Communications and Networking,” Prentice Hall, 2002, pp. 283-337.

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