Indoor location identification system
First Claim
1. A system for accurate locating of a mobile cellular telephone in an indoor environment, comprising:
- a. a distributed antenna system (DAS) that includes at least one remote hub unit (RHU) connected to at least one antenna located in a known area of the indoor environment; and
b. at least one location identification unit (LIU) coupled to said DAS and operative to extract a location of the mobile cellular telephone from radio frequency (RF) signals obtained from said DAS.
5 Assignments
0 Petitions
Accused Products
Abstract
A system and method or accurate location identification of a mobile cellular telephone in an indoor environment in case of emergency are provided. The system comprises elements of a distributed antenna system (DAS) and at least one location identification unit (LIU) coupled to the DAS and operative to extract the location of the mobile cellular telephone from RF signals obtained from the DAS. The LIU includes a receiver operative to receive the signals, preferably from a base unit (BU) of the DAS, and a processor operative to process the signals. The LIU obtains parameters of the emergency call that define a tuning window from an external system, and, using the tuning window, identifies a remote hub unit (RHU) of the DAS with the highest signal energy at the tuning window as the RHU through which the call was acquired. The location of the mobile cellular telephone is then determined as being in the area covered by this RHU.
82 Citations
22 Claims
-
1. A system for accurate locating of a mobile cellular telephone in an indoor environment, comprising:
-
a. a distributed antenna system (DAS) that includes at least one remote hub unit (RHU) connected to at least one antenna located in a known area of the indoor environment; and
b. at least one location identification unit (LIU) coupled to said DAS and operative to extract a location of the mobile cellular telephone from radio frequency (RF) signals obtained from said DAS. - View Dependent Claims (2, 3, 4)
-
-
5. A method for locating a mobile cellular telephone inside an indoor environment comprising the steps of:
-
a. obtaining radio frequency (RF) signals from a distributed antenna system (DAS) having at least one remote hub unit (RHU) connected to at least one antenna located inside the indoor environment; and
b. extracting the location of the mobile cellular telephone from said RF signals. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A method for identifying the indoor location of a mobile cellular telephone in case of an emergency, comprising the steps of:
-
a. acquiring an RF signal originated by the mobile cellular telephone through an indoor distributed antenna system (DAS) that includes at least one remote hub unit (RHU) connected to at least one said antenna; and
b. identifying a specific said at least one RHU through which said RF signal was acquired. - View Dependent Claims (19, 20, 21, 22)
-
Specification