Enhancing privacy in cellular paging system using physical layer identification
AssigneeUniversity of Maryland, College Park, a constituent institution of the University System
InventorsTuan TA, John S. Baras
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Abstract
A method for negating location privacy attacks in cellular networks involves signal processing techniques at the physical identification layer. In particular the methodology involves embedding user's unique tags onto the downlink paging signal waveforms so that the tags are stealthy and robust. The scheme not only improves users' privacy but also saves system bandwidth.
Claims24
A computer implemented method for a wireless communication system including a base station paging system for locating a mobile station within the base station dedicated broadcast region while preserving the location privacy of the located mobile station, the method comprising:
- at least one processor with accessible input/output and at least one data store to perform the following:
- generating a paging message;
- performing channel coding on the paging message;
- modulating the coded paging message;
- generating a unique tag for each one of a plurality of mobile stations;
- embedding at least one of said generated unique tags with the modulated coded paging message;
- transmitting the modulated coded paging message with the at least one embedded unique tag.
A computer implemented method for a wireless mobile device used in a wireless communication system which responds to a base station paging signal while preserving location privacy of the mobile device, the method comprising:
- at least one processor with accessible input/output and at least one data store to perform the following:
- receiving a paging signal from a base station;
- demodulating the paging signal;
- demodulating and decoding the paging signal into bits;
- detecting whether a unique tag assigned to the wireless mobile device has been received in the paging signal;
- responding to the base station paging signal if the unique tag has been detected.
A computer implemented method for a wireless communication system, having at least one base station and at least one mobile device, for locating the mobile device within the base station dedicated broadcast region while preserving the location privacy of the located mobile device, the method comprising:
- the at least one base station having at least one processor with accessible input/output and at least one data store to perform the following:
- generating a paging message;
- performing channel coding on the paging message;
- modulating the coded paging message;
- generating a unique tag for each one of a plurality of mobile stations;
- embedding at least one of said generated unique tags with the modulated coded paging message;
- transmitting the modulated coded paging message with the at least one embedded unique tag;
- and
- each one of said plurality of mobile stations having at least one processor with accessible input/output and at least one data store to perform the following:
- receiving a paging signal from the at least one base station;
- demodulating the paging signal;
- demodulating and decoding the paging signal into bits;
- detecting whether the unique tag for the corresponding one of a plurality of mobile stations has been received in the paging signal;
- and
- responding to the base station paging signal if the unique tag has been detected.
Dependencies are inferred from the claim text.