Method and Apparatus for Providing Location Services for a Distributed Network
First Claim
1. A system used to determine the one of a plurality of nodes of a distributed antenna system communicating with a mobile device, the system comprising:
- a processor communicatively connected to the distributed antenna system;
a memory communicatively attached to communicate with the processor and adapted to store a computer program comprising;
a lookup table creation routine to store minimum delay time and maximum delay time associated with each of a plurality of nodes in a look-up table;
a calculation routine to calculate round trip delay time of the mobile device; and
a lookup routine to compare the round trip delay time to the lookup table to select one of the plurality of nodes.
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Accused Products
Abstract
A method and system for providing E911 services for a distributed antenna system uses a lookup table including round trip delay (RTD) ranges for a number of nodes of the distributed antenna system to determine a serving node for an E911 call. The method and system disclosed herein, may calculate such lookup table based on the values of the fiber delays and air delays for each node on the distributed antenna system. After determining the serving node for an E911 call, the system may use triangulation method to determine the exact location of the wireless unit generating the E911 call.
163 Citations
31 Claims
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1. A system used to determine the one of a plurality of nodes of a distributed antenna system communicating with a mobile device, the system comprising:
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a processor communicatively connected to the distributed antenna system; a memory communicatively attached to communicate with the processor and adapted to store a computer program comprising; a lookup table creation routine to store minimum delay time and maximum delay time associated with each of a plurality of nodes in a look-up table; a calculation routine to calculate round trip delay time of the mobile device; and a lookup routine to compare the round trip delay time to the lookup table to select one of the plurality of nodes. - View Dependent Claims (4, 5, 12, 15, 18, 26, 30)
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2. A system used to determine two of a plurality of nodes of a distributed antenna system communicating with a mobile device, the system comprising:
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a processor communicatively connected to the distributed antenna system; a memory communicatively attached to communicate with the processor and adapted to store a computer program comprising; a lookup table creation routine to store minimum delay time and maximum delay time associated with each of a plurality of nodes in a look-up table; a calculation routine to calculate round trip delay time of the mobile device; and a lookup routine to compare the round trip delay time to the lookup table to select two of the plurality of nodes. - View Dependent Claims (6, 8, 9, 13, 16)
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3. A system used to determine a minimum of three of a plurality of nodes of a distributed antenna system communicating with a mobile device, the system comprising:
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a processor communicatively connected to the distributed antenna system; a memory communicatively attached to communicate with the processor and adapted to store a computer program comprising; a lookup table creation routine to store minimum delay time and maximum delay time associated with each of a plurality of nodes in a look-up table; a calculation routine to calculate round trip delay time of the mobile device; and a lookup routine to compare the round trip delay time to the lookup table to select a minimum of three out of the plurality of nodes. - View Dependent Claims (7, 10, 11, 14, 17)
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19. A method for determining the node of a wireless communication network receiving a 911 call from a mobile device, the method comprising:
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storing minimum delay time and maximum delay time associated with each of a plurality of nodes in a look-up table; receiving the 911 call at a base transmission station; calculating the actual time delay between placing the 911 call from the mobile device and receiving the 911 call at the base transmission station; and comparing the actual time delay with the minimum delay time and the maximum delay time associated with each of a plurality of nodes in the look-up table to determine the node associated with the 911 call. - View Dependent Claims (20, 21, 22, 23, 27, 28, 29, 31)
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24. A lookup table stored on a memory communicatively attached to a processor, wherein the lookup table comprises:
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maximum round trip delay time attached to a node on a distributed antenna system; and minimum round trip delay time attached to the node on the distributed antenna system. - View Dependent Claims (25)
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Specification