System for location finding
First Claim
1. A system for locating a wireless communication asset within a network region, the system comprising:
- a communication asset including a multi-mode antenna configurable in a plurality of modes, wherein the multi-mode antenna of the communication asset exhibits distinct radiation pattern characteristics when configured in each of the plurality of modes;
a first sensor, the first sensor including a multi-mode antenna configurable in a plurality of modes, wherein the multi-mode antenna of the first sensor exhibits distinct radiation pattern characteristics when configured in each of the plurality of modes;
a processor connected to the first sensor, the processor adapted to acquire and store information received at the first sensor;
wherein the system is adapted to;
configure the multi-mode antenna of the first sensor in a first mode of the plurality of modes of the multi-mode antenna of the first sensor and configure the multi-mode antenna of the communication asset in a first mode of the plurality of modes of the multi-mode antenna of the communication asset;
with the multi-mode antenna of the first sensor in the first mode and with the multi-mode antenna of the communication asset in the first mode, sample the network region to obtain a first receive-signal from at least one of the first sensor or the communication asset within the network region, the first receive-signal comprising first information, wherein the first information includes amplitude data and phase data;
store the first information;
configure the multi-mode antenna of the first sensor in a second mode of the plurality of modes of the multi-mode antenna of the first sensor and configure the multi-mode antenna of the communication asset in a second mode of the plurality of modes of the multi-mode antenna of the communication asset;
with the multi-mode antenna of the first sensor in the second mode and with the multi-mode antenna of the communication asset in the second mode, sample the network region to obtain a second receive-signal from at least one of the first sensor or the communication asset within the network region, the second receive-signal comprising second information, wherein the second information includes amplitude data and phase data;
store the second information;
determine a signal variation based at least in part on a difference between the first information and the second information;
determine data associated with one or more potential locations of the communication asset within the network region based at least in part on a comparison of the signal variation to a priori knowledge of radiation pattern characteristics, the data associated with each of the potential locations comprising a direction and a distance to the communication asset; and
eliminate, based at least in part on the comparison and based at least in part on the a priori knowledge of radiation pattern characteristics, one or more incorrect potential locations of the communication asset from the one or more potential locations of the communication asset.
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Accused Products
Abstract
A system for location finding of devices and personnel for in-building applications is described. A group of sensors are distributed throughout a region or building of interest where each sensor contains an RF transceiver and an antenna system, with the antenna system capable of generating multiple radiation patterns or modes. The assets to be tracked by the sensors can have RF transceivers associated with each asset, and these transceivers can have antenna systems capable of generating multiple radiation patterns or modes. A system controller containing a processor is integrated into the system and is used to control the sensors and assets.
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Citations
19 Claims
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1. A system for locating a wireless communication asset within a network region, the system comprising:
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a communication asset including a multi-mode antenna configurable in a plurality of modes, wherein the multi-mode antenna of the communication asset exhibits distinct radiation pattern characteristics when configured in each of the plurality of modes; a first sensor, the first sensor including a multi-mode antenna configurable in a plurality of modes, wherein the multi-mode antenna of the first sensor exhibits distinct radiation pattern characteristics when configured in each of the plurality of modes; a processor connected to the first sensor, the processor adapted to acquire and store information received at the first sensor; wherein the system is adapted to; configure the multi-mode antenna of the first sensor in a first mode of the plurality of modes of the multi-mode antenna of the first sensor and configure the multi-mode antenna of the communication asset in a first mode of the plurality of modes of the multi-mode antenna of the communication asset; with the multi-mode antenna of the first sensor in the first mode and with the multi-mode antenna of the communication asset in the first mode, sample the network region to obtain a first receive-signal from at least one of the first sensor or the communication asset within the network region, the first receive-signal comprising first information, wherein the first information includes amplitude data and phase data; store the first information; configure the multi-mode antenna of the first sensor in a second mode of the plurality of modes of the multi-mode antenna of the first sensor and configure the multi-mode antenna of the communication asset in a second mode of the plurality of modes of the multi-mode antenna of the communication asset; with the multi-mode antenna of the first sensor in the second mode and with the multi-mode antenna of the communication asset in the second mode, sample the network region to obtain a second receive-signal from at least one of the first sensor or the communication asset within the network region, the second receive-signal comprising second information, wherein the second information includes amplitude data and phase data; store the second information; determine a signal variation based at least in part on a difference between the first information and the second information; determine data associated with one or more potential locations of the communication asset within the network region based at least in part on a comparison of the signal variation to a priori knowledge of radiation pattern characteristics, the data associated with each of the potential locations comprising a direction and a distance to the communication asset; and eliminate, based at least in part on the comparison and based at least in part on the a priori knowledge of radiation pattern characteristics, one or more incorrect potential locations of the communication asset from the one or more potential locations of the communication asset. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for locating a position of a communication asset within a network region, the communication asset including a multi-mode antenna configurable in a plurality of modes, the method comprising:
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providing a first sensor connected to a multi-mode antenna, the multi-mode antenna configurable in a plurality of modes, wherein the multi-mode antenna of the first sensor exhibits distinct radiation pattern characteristics when configured in each of the plurality of modes; providing a processor connected to the sensor, the processor adapted to acquire and store information received at the sensor; configuring the multi-mode antenna of the first sensor in a first mode of the plurality of modes of the multi-mode antenna of the first sensor and configuring the multi-mode antenna of the communication asset in a first mode of the plurality of modes of the multi-mode antenna of the communication asset; with the multi-mode antenna of the first sensor in the first mode and with the multi-mode antenna of the communication asset in the first mode, sampling the network region to obtain a first receive-signal from at least one of the first sensor or the communication asset within the network region, the first receive-signal comprising first information, wherein the first information includes amplitude data and phase data; storing the first information; configuring the multi-mode antenna of the first sensor in a second mode of the plurality of modes of the multi-mode antenna of the first sensor and configuring the multi-mode antenna of the communication asset in a second mode of the plurality of possible modes of the multi-mode antenna of the communication asset; with the multi-mode antenna of the first sensor in the second mode and with the multi-mode antenna of the communication asset in the second mode, sampling the network region to obtain a second receive-signal from at least one of the first sensor or the communication asset within the network region, the second receive-signal comprising second information, wherein the second information includes amplitude data and phase data; storing the second information; determining a signal variation based at least in part on a difference between the first information and the second information determining data associated with one or more potential locations of the communication asset within the network region based at least in part on a comparison of the signal variation to a priori knowledge of radiation pattern characteristics, the data associated with each of the potential locations comprising a direction and a distance to the communication asset; and eliminating, based at least in part on the comparison and based at least in part on the a priori knowledge of radiation pattern characteristics, one or more incorrect potential locations of the communication asset from the one or more potential locations of the communication asset. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification