The airline industry could save $600m a year by tracking passengers through airports and punting ads to their mobiles, along with their tickets and boarding passes, according to a report from airline industry tech supplier SITA...
...The tracking idea could be done in conjunction with the network operators, in much the same way commercial tracking happens now. At present customers receive an SMS asking them if they're OK with the idea, and if they don’t say no then the third party (in this case the airport) gains access to instant information about the location of the phone, and hence that of the user. That generally gives rough information, though the density of cells within an airport should give locations within a hundred meters or so.
If working with the operators is too much effort, or more accuracy is desired, then airlines could use the technique Path Technologies is already deploying in shopping centres - airports being a cross between a shopping centre and an open prison these days anyway. Path Technologies track handsets, not their owners, but a link could be established during the check-in procedure.
Read article at - 'Mobile phones to save airlines'