System and method for detecting a cellular device
Methods and systems for cellular device detection are presented. A signal processing receiver operable to determine a plurality of uplink parameters according to a downlink broadcast message. The signal processing receiver is also configurable to receive an uplink message according to the plurality of uplink parameters, thereby determining a presence and/or an identity of a cellular device by decoding the uplink message.
1. A method for detecting a cellular device with a signal processing receiver, the method comprising:
determining a plurality of uplink parameters based on a downlink broadcast message;
configuring the signal processing receiver to receive an uplink message according to the plurality of uplink parameters, wherein the uplink message is transmitted by a cellular device in response to the downlink broadcast message; and
detecting the cellular device by processing the uplink message.
2. The method of claim 1 , wherein processing the uplink message comprises decoding the uplink message.
3. The method of claim 1 , wherein processing the uplink message comprises measuring a physical layer parameter of the uplink message.
4. The method of claim 1 , wherein determining the plurality of uplink parameters comprises decoding a downlink broadcast message.
5. The method of claim 1 , wherein the plurality of uplink parameters comprises a time basis and/or a frequency basis for an uplink frame.
6. The method of claim 1 , wherein the plurality of uplink parameters corresponds to a particular cellular basestation and the plurality of uplink parameters is stored as an entry in a list, the list comprising a plurality of entries, each entry corresponding to one of a plurality of basestations.
7. The method of claim 6 , wherein the list is shared between each of a plurality of signal processing receivers.
8. The method of claim 1 , wherein the method comprises identifying the cellular device by decoding an electronic identifier in the uplink message.
9. A system comprising:
a signal processing receiver operable to determine an uplink band based on a downlink broadcast message, the signal processing receiver being operable to determine that a cellular device is active based on an uplink message in the uplink band, wherein the uplink message is transmitted by the cellular device in response to the downlink broadcast message; and
a memory operable to store the uplink band.
10. The system of claim 9 , wherein the cellular device is a cellular phone.
11. The system of claim 9 , wherein the signal processing receiver is operable to decode the downlink broadcast message.
12. The system of claim 9 , wherein the signal processing receiver is operable to determine a time basis and/or a frequency basis for an uplink frame.
13. The system of claim 9 , wherein data in the memory is shared between each of a plurality of signal processing receivers.
14. The system of claim 9 , wherein the signal processing receiver is operable to identify the cellular device by decoding an electronic identifier in the uplink message.
15. The system of claim 9 , wherein the signal processing receiver is operable to identify a service provider from the downlink broadcast message.