8. Assets, personnel or device movement history Tracking by GSM Cell ID Example GSM device trail (Train journey Basingstoke to London) using Cell ID (Client server)
9. Assets, personnel or device movement history Tracking by GPS/GSM devices Trackar device Example tracking history using GPS (Client server)
18. GSM Cell Mapping – cell shape Cells are not like this Cells are more like this
19. Cells and CellID Segment CellID example Circular CellID example Cell shapes are not like this but are created by BTS antennae……
20. 3 sector BTS are common using directional antennae but …. … directional antennae are all provided with radiation pattern charts in the vertical and horizontal planes and these show side lobes and back lobes… Directional antennae
21. Directional antennae tilting is used to control and improve antennae coverage footprint but electrical tilting forces back and side lobes down. This modifies the cell shape … Tilting
22. Presumed 3 sectored BTS and related Cells True Cell shape Actual cells could have side and/or back lobe included Creates problems for security & LEAs…… Back lobes
23. True Cell shape A target or road side bomb presumed to be here……. For accurate Cell ID usage the true shape and mapping of cells must be known accurately … could be here 500 m away!!
24. Cell power vectors Strongest cell with distinct shadow close to the mast Position of BTS and reception measurement points Strongest reception within 200m of the BTS is back lobe of another cell Return
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