System and method for location of mobile devices in confined environments
View Patent ↗A distributed antenna system includes a master unit and a plurality of remote units in communication with the master unit. A plurality of sensors are associated with the respective remote units and the sensors include receiver circuitry configured for capturing RF signals from mobile devices and a controller. The sensors are configured for using the RF signals from at least one mobile device captured by the receiver circuitry and determining position information for the at least one mobile device in the distributed antenna system. The receiver circuitry of the sensor includes an RF receiver integrated with a respective remote unit that is operable to receive RF signals from mobile devices for providing RF communications in the distributed antenna system.
1. A distributed antenna system, comprising:
a master unit;
a plurality of remote units in communication with the master unit; and
a plurality of sensors associated with respective remote units;
the sensors including receiver circuitry configured for capturing RF signals from mobile devices and including a controller;
the sensors configured for using the RF signals from at least one mobile device captured by the receiver circuitry and determining position information for the at least one mobile device in the distributed antenna system;
the receiver circuitry of a sensor including an RF receiver integrated with a respective remote unit and operable to receive RF signals from mobile devices for providing RF communications in the distributed antenna system.
2. The distributed antenna system of claim 1 further comprising a processing unit coupled with the remote units, the processing unit coupled to receive the position information and further processing the position information to determine the position of the at least one mobile device in the distributed antenna system.
3. The distributed antenna system of claim 2 wherein the processing unit is coupled with the remote units to receive the position information for the at least one mobile device determined by a plurality of sensors and further processing the position information from the plurality of sensors to determine the position of the at least one mobile device in the distributed antenna system.
4. The distributed antenna system of claim 1 wherein the receiver circuitry is in communication with the controller.
5. The distributed antenna system of claim 1 wherein the sensor is configured for evaluating information of the captured RF signals including at least one of received signal strength (RSSI) information or time difference of arrival information.
6. The distributed antenna system of claim 1 wherein the receiver circuitry of a sensor is triggered for capturing RF signals from a mobile device based on at least one of the following triggering events: a location based service request, a location request of a mobile device or a signal received by the sensor being above a threshold.
7. The distributed antenna system of claim 1 wherein the position information for a mobile device includes information regarding at least one of: latitude, longitude, height, an area of a building, a floor of a building, a room of a building, a hall of a building, a row of a building or a section of a building.
8. The distributed antenna system of claim 1 , wherein the sensors are configured for receiving signals and determining position information for the respective sensors.
9. The distributed antenna system of claim 8 , wherein the position information for the sensors includes absolute positions for the sensors.
10. The distributed antenna system of claim 8 , wherein the position information for the sensors includes position information that is relative to another sensor.
11. The distributed antenna system of claim 1 , wherein the processing unit includes a location capture processing unit for further processing the position.
12. The distributed antenna system of claim 11 , wherein the location capture processing unit is further configured for being in communication with a mobile location center.
13. The distributed antenna system of claim 11 , wherein the location capture processing unit is further configured for processing information from at least one base station and for determining the identity of the at least one base station.
14. The distributed antenna system of claim 11 , wherein the location capture processing unit is further configured for processing information from at least one base station and determining the identity of the at least one base station, the location capture processing unit further configured for using position information received by a sensor and the information from the base station to determine the position of the at least one mobile device.
15. The distributed antenna system of claim 11 wherein the location capture processing unit is further configured for being in communication with a building security system.
16. The distributed antenna system of claim 1 , wherein at least one of the sensors further includes a detector selected from the group consisting of: a temperature detector, a movement detector, an acoustic noise detector, a fire detector, a smoke detector, a gas detector, and combinations thereof.
17. The distributed antenna system of claim 1 , wherein at least one of the sensors further includes a device selected from the group consisting of: a microphone, a wide angle video camera, a speaker, and combinations thereof.
18. The distributed antenna system of claim 1 further configured to use trilateration of signals captured by the receiver circuitry of a plurality of sensors to determine position information for the at least one mobile device.