Geofencing moveable vehicles

Geofencing Moveable Vehicles

Field

The present invention relates to the field of GeoFencing - the concept of providing information that indicates through GPS signal fixing at, and of, a vehicle or other apparatus or system receiving its GPS location or address, that the vehicle or the like has not strayed beyond some predetermined area surrounding that location - the so-called GeoFence established around an original address or location of the vehicle or the like.

Background

As described, for example, at Qualcam http://www.qualcam.com. Air IQ http ://www. airir . com, and Highway Master(g),trackhttp://www.highwaymaster.com. as illustrations, the prior art of such GeoFencing requires either entry via send-port or other physical interface or the day-to-day downloading at the vehicle of data points for establishing the parameters of the fence to be established around the vehicle origin location, to be transmitted from an outside source such as a remote central server station, generally over an air interface such as the cellular telephone networks. In accordance with existing methods, hardware is installed in the vehicle, such hardware consisting of a GPS receiver, processor / memory, and firmware, and power supply. The variations of the GeoFence can be applied once the latitude and longitude is determined by the hardware and the location is registered at the central station, which then transmits data points for the setting of the desired GeoFence area, for downloading at the vehicle to define the desired GeoFence latitude and longitude parameters. If the

vehicle is unauthorizedly driven out of the established GeoFence, it is possible then to

cause an alarm to be sent over a radio or telephone channel to provide notification that

the vehicle has been so moved. Alternatively, if the vehicle, such as construction

equipment or the like, is to be located at a different site, a new GPS origin location is

received at the new site by the vehicle and is registered at the central station, and new

sets of data points are transmitted from the station to the vehicle or apparatus to set up

a new GeoFence; or to expand or contract a GeoFence, all as desired. The fence

parameters may change because the position of the vehicle itself may be moved from

town to town, requiring changed origin points; or the size of the GeoFence may be

varied, altering the radius from, say, one mile to two miles. A delivery vehicle, for

example, may choose to expand the area of its delivery van from just one city to

neighboring cities.

The before-described present-day transmission of GeoFence data to be

downloaded at the vehicle requires considerable bandwidth in the communications

network to enable downloading all of the new latitude-longitudinal information to

establish the GeoFence, requiring considerable air time to do so and intensive

messaging, or requires direct input via a physical interface to the hardware. Extensive

messaging is required, indeed, to get enough data into the vehicle hardware to establish

a new GeoFence.

These difficulties are alleviated in accordance with the technique of the present

invention by building the capability of establishing the new GeoFence within the firmware product in the vehicle itself, and requiring only commands from the central

station to set up the new GeoFence— totally eliminating the present-day need for

transrni ting data from the station and re-loading such new data points into the vehicle

resident hardware.

As an illustration, it may be desired to move a piece of construction equipment,

say, a steam shovel, to a new location. Once the vehicle is moved, the central station

sends a command to it to determine the new home origin location points or address by

its GPS equipment and to register the new location with the station. A subsequent

command will activate the algorithm provided in accordance with the invention within

the firmware of the vehicle processing equipment to calculate within the unit itself, the

new data points for the selected GeoFence~say a circle of 2-mile radius about the new

origin location. This totally eliminates the requirement for the station to send the new

fence data , since the vehicle unit itself now calculates the new GeoFence parameters

dynamically within itself .

At the time of manufacture of the vehicle processing unit, the characteristics of

the GeoFence are , or can be, pre-established— whether it will be a circle, or a square, or

a polygon such as a hexagon or an octagon approximating a circle. Once determined,

the unit software will, in operation, generate the new latitude and longitude points for

the perimeter of the GeoFence about the home origin point or address.

Objects of Invention

The primary object of the invention, thus, is to provide a new and improved

method of and apparatus for GeoFencing that shall not be subject to the prior art and present-day disadvantages above described; but that, to the contrary, enable dynamic

GeoFence establishment at the vehicle itself upon command from a remote central or

control station.

Other and further objects will be explained hereinafter and are more particularly

delineated in the appended claims.

Summary

In summary, however, from one of its broadest viewpoints, the invention

embraces a method of controlling from a remote control center the dynamic GeoFencing

of a vehicle or other movable apparatus internally provided with a GPS receiver, a

software-implemented processor, and communication links, that comprises,

transmitting a command from said control center to the vehicle to receive and transmit

to the control center, its current GPS location point; pre-determining at the control

center the desired shape and size of a GeoFence around the vehicle and transmitting

commands to the vehicle to establish such a GeoFence; and responding at the processor

to said commands by operating said software to calculate in the processor the location

of points defining the perimeter of said desired shape and size of GeoFence, thereby

establishing the desired GeoFence about the current vehicle location point from data

calculated at said vehicle processor.

Preferred and best mode embodiments and designs are later detailed.

Drawings

The invention will now be explained in connection with the accompanying

drawings, Fig. 1 of which is an explanatory diagram of different GeoFence areas; Figs. 2 and 3 are system diagrams showing the inter-relation of vehicles (or the

like) to-be-monitored and GPS satellite navigation signaling and control center links

used in accordance with the invention; and

Fig.4 is a diagram of changed site and remote control station interaction.

Description of Preferred Embodiment (s of Invention

Referring to Fig. 1, a plurality of different-area GeoFence geometric shapes are

shown established around a central vehicle origin location O— as, for example, of

circular or polygonic shape. The data points P for establishing the perimeter are, in

accordance with the technique underlying the present invention, as later detailed,

computed by the processor within the vehicle at O on external command, once the

vehicle GPS receiver has identified its origin location. The size of the GeoFence is

varied by changing the radius or effective radius r, r¹ for the GeoFence, by command. .

A vehicle 1 is shown in the form of a crane for illustrative purposes in Fig. 2,

equipped with a GPS receiver 1 A for receiving navigation position-location signals SL

from the GPS constellation 2, a processor IB, and a communication modem or link 1C

for communicating along ST and receiving along Sc to and from a central control center

station 3. The control center station, Figs. 2 and 3, communicates along Sc with

commands, later explained, for the control of the software-programmed processor IB,

and also may request the GPS satellite 2 (S, Fig. 2) and/ or the GPS vehicle receiver 1 A,

to signal the longitude-latitude current position coordinates for the current location O of

the vehicle 1 as is well known. The vehicle 1 will provide along ST the current (or new)

location information received at the vehicle from the satellite, to the central station 3 for registration thereat. Upon such command Scfrom the central control station 3, the

vehicle 1 therefore identifies its current (new) location or site.

At the control center, a decision is made to establish a desired, or to change a

GeoFence around the vehicle at its identified current (new) location, and a command

signal Sc is sent to the vehicle to establish a new GeoFence and also, preferably

simultaneously, to designate what new parameters for the GeoFence the vehicle

processor IB is to calculate.

Upon receipt at the vehicle unit of such commands, the vehicle processor 18k.

calculates by its internal software and firmware such new GeoFence parameters

selected by the control center station. The new parameters are selectable after the

vehicle determination from the GPS satellite of its current home position, through the

well-known use of numbered tables—a first for selection of a particular geometric

pattern or shape (circular, polygon, etc.) from a fence shape numbered table Ti, Fig. 2,

and then for selection of the size of the shape from a second pre-prepared numbered

table T2-- for example, the selection of a circular fence and the selection of a radius, say,

of 2 miles from the control center. Such communications may be effected via a cellular

telephone channel or by other radio air link interfaces as by NHF, UHF and the like,

including the Lojack "One Phone" and "Location" systems described in copending U.S.

patent applications, Serial Νos., 09/235,606, filed January 20, 1999 and 09/662,278, filed

September 14, 2000 and 09/194,242, filed November 25, 998. The internal firmware-software at the vehicle, by well-known types of

implementation, itself thus calculates and establishes the GeoFence and desired changes

therein without the necessity for the supplying of data from the control center as is

presently done, though subject to the above-described and other disadvantages, all

overcome by the dynamic GeoFencing concept of the present invention.

An example of the use of the invention is shown in Fig. 4 where a first

established GeoFence of an exemplary two-mile radius has been set up (far right) for a

vehicle at origin O in Boston. The vehicle is then moved to Worchester (0¹) and a five

mile radius GeoFence is set up with the longitude-latitude data points P defining the

circular fence calculated internally by the vehicle processor upon command of the

remote central control station at Braintree, as earlier described. A supplemental "help"

or alarm signal is also illustrated as sent to the station in an emergency or in the event

the vehicle has been unauthorizedly moved outside the established GeoFence.

Further modifications will occur to those skilled in this art and such are

considered to fall within the spirit and scope of the present invention as defined in the

appended claims.