Granted Patent B2

US 7,333,813 · App. 10/457,456 · Granted Feb 19, 2008

Abstract

Claims (40)

1. A method for assigning a mobile device to a base station and assigning a transmit power level comprising:

(a) generating a plurality of matrices of channel conditions between each mobile device and each base station;

(b) selecting one of the generated matrices;

(c) normalizing the channel matrix using a cost parameter;

(d) assigning a mobile device to a base station associated with an element from the matrix which indicates a maximum value;

(e) assigning a power level the assigned mobile device may transmit data signals at upon being assigned to the base station associated with the maximum value element;

(f) deleting those elements in the same matrix row and column as the maximum value element to form a revised matrix;

(g) selecting a next element associated with a next maximum value from the revised matrix;

(h) assigning a next mobile device to a next base station associated with the next element;

(i) assigning a power level to the next mobile device that it may transmit data signals at upon being assigned to the base station associated with the next maximum value element;

(j) repeating steps (d) through (i) until all elements of the original matrix have been selected or deleted;

(k) repeating steps (b) through (j) for all possible channel matrices;

(l) calculating the average transmit power level used for each mobile device;

(m) comparing the average transmit power level used by each mobile device to a maximum average transmit power level available to each mobile device;

(n) revising a cost parameter based on the comparison of the average transmit power level used by each mobile device to the maximum average transmit power level; and

(o) repeating steps (b) through (n) until the average transmit power level used by each mobile device coincides with the maximum average transmit power level for each mobile device.

2. The method as in claim 1 further comprising assigning a plurality of mobile devices to a plurality of base stations and assigning each mobile device a transmit power level for the transmission of data signals.

3. The method as in claim 1 further comprising:

recording the base station assignments for each mobile device; and

recording transmit power levels for each mobile device.

4. A device operable to assign a mobile device to a base station and assign a transmit power level, the device further operable to:

(a) generate a plurality of matrices of channel conditions between each mobile device and each base station;

(b) select one of the generated matrices;

(c) normalize the channel matrix using a cost parameter;

(d) assign a mobile device to a base station associated with an element from the matrix which indicates a maximum value;

(e) assign a power level the assigned mobile device may transmit data signals at upon being assigned to the base station associated with the maximum value element;

(f) delete those elements in the same matrix row and column as the maximum value element to form a revised matrix;

(g) select a next element associated with a next maximum value from the revised matrix;

(h) assign a next mobile device to a next base station associated with the next element;

(i) assign a power level to the next mobile device that it may transmit data signals at upon being assigned to the base station associated with the next maximum value element;

(j) repeat steps (d) through (i) until all elements of the original matrix have been selected or deleted;

(k) repeat steps (b) through (j) for all possible channel matrices;

(l) calculate the average transmit power level used for each mobile device;

(m) compare the average transmit power level used by each mobile device to a maximum average transmit power level available to each mobile device;

(n) revise a cost parameter based on the comparison of the average transmit power level used by each mobile device to the maximum average transmit power level; and

(o) repeat steps (b) through (n) until the average transmit power level used by each mobile device coincides with the maximum average transmit power level for each mobile device.

5. The device as in claim 4 further operable to assign a plurality of mobile devices to a plurality of base stations and to assign each mobile transmit power level for the transmission of data signals.

6. The device as in claim 4 further operable to:

record the base station assignments for each mobile device; and

record transmit power levels for each mobile device.

Assignments (9)