Patent ID: 7787891

Claim:
A method, including: at a mobile station (MS) in a wireless packet-carrying network, calculating a first distance (R 1 ) between the MS and a first base station (BS 1 ) using a first path loss value (L 1 ), wherein L 1 comprises a value of a reduction in signal strength of a signal as transmitted by the BS 1 and as received by the MS; calculating a second distance (R 2 ) between the MS and a second base station (BS 2 ) using a second path loss value (L 2 ), wherein L 2 comprises a value of a reduction in signal strength of a signal as transmitted by the BS 2 and as received by the MS; and triangulating a position of the MS relative to a grid using R 1 and R 2 , wherein triangulating the position of the MS relative to the grid comprises: solving R 1 2 =(X-X 1 ) 2 +(Y-Y 1 ) 2 and R 2 2 =(X-X 2 ) 2 +(Y-Y 2 ) 2 for X and Y, wherein X and Y comprise coordinates of the MS on the grid, X 1 and Y 1 comprise coordinates of the BS 1 on the grid, and X 2 and Y 2 comprise coordinates of the BS 2 on the grid; receiving first path loss parameter values at the MS from the BS 1 , wherein the first path loss parameter values comprise at least one of a value of transmit power (P 1 ) at the BS 1 , an antenna height (H 1 ) associated with the BS 1 , or a position (X 1 ,Y 1 ) of the BS 1 relative to a grid; receiving second path loss parameter values at the MS from the BS 2 , wherein the second path loss parameter values comprise at least one of a value of transmit power (P 2 ) at the BS 2 , an antenna height (H 2 ) associated with the BS 2 , and a position (X 2 , Y 2 ) of the BS 2 relative to the grid; calculating R 1 as ten to the power of (L 1 −(46.3+33.9 log(f c1 )−13.82 log(h b1 ))−E 1 +G 1 )/(44.9−6.55 log(h b1 )); and calculating R 2 as ten to the power of (L 2 −(46.3+33.9 log(f c2 )−13.82 log(h b2 ))−E 2 +G 2 )/(44.9−6.55 log(h b2 )), wherein E 1 and E 2 are approximately equal to 3.2(log(11.75h m )) 2 −4.97, G 1 and G 2 are approximately equal to zero dBm for medium cities and suburban areas and three dBm for large cities, f c1 is approximately equal to a carrier frequency associated with the BS 1 , f c2 is approximately equal to a carrier frequency associated with the BS 2 , h b1 is an approximate height of an antenna associated with the BS 1 above a ground level, h b2 is an approximate height of an antenna associated with the BS 2 above the ground level, and h m is an approximate height of an antenna associated with the MS above the ground level.