The present disclosure relates generally to tolling and parking payment systems, and more particularly to the use of novel techniques to derive high geo-location accuracy determination for dynamically defined tolling lanes and parking spaces for mobile payments.
The use of Global Positioning System (GPS) receivers in smartphones has revolutionized location based services since its inception. However, there have been incidents where the location accuracy (or lack thereof) has caused loss of lives, and not been able to be used in certain applications; one of those applications is in the High Occupancy Vehicle (HOV) lanes. The best theoretical accuracy for existing GPS is on the average of 5 to 15 meters, and it can vary depending on the surroundings (obstacles to line-of-sight from the satellites), the devices (type) used; the weather and many other factors, with an average worst case of 30 to 40 meters. HOV and many other applications need much better accuracy performance to ensure a vehicle is actually in an HOV lane, as well as to determine when a vehicle is not in an HOV lane.
One reason the existing location accuracy varies so much is because commercial GPS has been derived from the classic L1 signal transmitted from existing satellites. This signal is influenced easily by multipath reflections and interference in unfavorable and obstructive conditions, hence not providing the shortest signal path to the GPS receiver, instead a glob of multipath signals (e.g. signal echoes produced by the signal being reflected by large structure, both natural and man-made) create the highly varying average accuracy. However, there is a new mass-market GPS chip coming to smartphones in 2018 that increases accuracy to 30 centimeters. This new chip takes advantage of another signal now available in the new generation of satellites called L5. This signal also provides satellite location and timing synchronization information, but the new signal has almost twice the power of the L1 signal, and it uses a more robust modulation at a different frequency which decreases interference and improves multipath rejection making it easier for the GPS receiver to acquire the L5 signal. This, in combination with the more power efficient chip manufacturing process, the improved smartphone power saving architectures, and the availability of more new satellites with the L5 signal, allows for a new tier of location-based services.
HOV toll lanes or express toll lanes for multi-occupancy vehicles can provide an effective way to bypass traffic for the user; and for the agency, a way to generate additional funding for the construction of new roads. HOV lanes may charge full price for single occupancy vehicles, half price for high occupancy vehicles with two or more occupants and nothing for high occupancy vehicles with three or more occupants. However, HOV lanes take a long time to be constructed and they do not resolve the traffic congestion problem if there is an accident or construction in the lane because there is no way to dynamically redefine an HOV lane.
Similarly, a problem exists with parking spaces. Parking lots and spaces conventionally require some infrastructure, such as lot attendants, meters, or centralized payment kiosks. In some places drivers can pay by phone for a specific parking spot, but these all still require the physical delineation of parking spaces. Present GPS accuracy is not good enough to identify a given parking spot when a vehicle pulls into a specific space without a considerable settling time to average location determinations, which is typically longer than a person is willing to wait before exiting and leaving the vehicle.
Other vehicle-related services will greatly benefit from higher accuracy GPS, such as, for example, the ability to distinguish between private and public roadways in order to determine a road usage tax, which is being given increasing consideration as the number of electric vehicles, which do not pay taxes through the purchase of gasoline, increase. Furthermore, services such as “curbside” delivery can be enabled by higher accuracy GPS, allowing a driver to drive into a specific parking/waiting space on a merchant's grounds, indicate their space to a merchant, and have goods brought out to their specific parking space.
Since it will take some time for all of the models to adapt the new chip technology, there is a need for solutions that improve GPS accuracy in tolling with the L1 signal alone. Accordingly, there is a need for a method and apparatus to improve location accuracy for a variety of vehicular-related applications.
The accompanying figures throughout the separate views, together with the description below, and are incorporated in and form part of the specification to further illustrate embodiments of concepts that include the claimed invention and explain various principles and advantages of those embodiments.
A system for identifying the location of a vehicle is disclosed in which a mapping of physical spaces in which vehicles can travel and/or park is defined by location polygons that describe the geo-location coordinates of their corresponding physical spaces. Rather than relying on the exact location determined by a satellite location system, the location is mapped to a location polygon to account for errors in the location determinations. Any location mapped to a given location polygon implies the vehicle (as inferred by the location of the device used to determine location) is in the location corresponding to the location polygon. Thus, travel along specific lanes of multi-lane roadways can be determined and tracked. This allows, for example, toll charges for using high occupancy vehicle lanes, as well as assessing whether the vehicle has violated the HOV lane boundaries by improperly entering or exiting the HOV lane. In other applications location polygons can be used for parking applications where they identify specific parking spaces for regular parking, or for drive-up delivery parking at retail locations. Location polygons can be used to distinguish private from public roadways for determining road use charges.
Furthermore, the use of location polygons to define roadway features such as tolling lanes, HOV lanes, and parking spaces allows the dynamic definition of the these features over existing physical roadways. That allows, for example, the instant creation of an additional HOV or tolling lane, the designation of one or more lanes as non-toll lanes (e.g. in the event of an emergency evacuation), re-routing of lanes due to temporary conditions such as construction, accidents, the dynamic creation and designation of parking spaces, and so on. This is especially useful when used in conjunction with high precision satellite location systems such as the GPS L5 signal. Furthermore, it is useful in conjunction with connected autonomous vehicles that can be designed to follow and utilize such dynamically defined roadway features.
Toll is paid electronically in response to a vehicle passing a tolling point such as tolling point 128. In some embodiments, tolling can be done via an application on a mobile device such as a cellular phone device 116 that can be present in vehicle 112. The cellular phone device 116 can be communicatively linked to a toll transponder 118 that interacts with a gantry or similar toll reader. In some embodiments tolling point 128 can be a toll gantry that includes toll readers over each lane or just the HOV Express Lane. Toll readers transmit a radio signal in a narrow pattern over their respective lane that, upon being received by a toll transponder 118, causes the toll transponder 118 to respond by transmitting its unique identifier back to the reader. The tolling agency operating the tolling point 128 then bills the toll to an account associated with the identifier of the toll transponder 118. In some embodiments the toll transponder 118 can be normally asleep until the communicatively linked cellular phone device 116 (or similar mobile device) detects approach of the tolling point 128 and wakes up or otherwise activates the toll transponder 118. The unique identifier provided by the toll transponder 118 can be given to the toll transponder 118 by the cellular phone device 116. Thus, if the toll transponder 118 is stolen it can't be used to make charges against the owner's toll account.
To administer a toll account the user of the cellular phone device 116 can use the cellular phone device to run a tolling application program to connect to a toll service server or web service 124 by communicating through a cellular infrastructure 120 that is connected to a wide area network 122 (WAN) such as the Internet. The toll service server 124 can maintain account information, including records of transactions and a balance of the user's account. The user can access the user's bank 126 to periodically or occasionally as needed transfer funds to the tolling service server 124. As the user's vehicle (e.g. vehicle 112) passes a tolling point, such as tolling point 128, the user's account will be debited by the toll amount and a transaction record created to reflect the toll charge and balance adjustment. It will be appreciated by those skilled in the art that other access modalities can be used to administer a toll account at the toll service server 124, including using a personal computer that is connected to a data network or equivalent that is further connected to the WAN 122. Further, the cellular phone device 116 can include other communication modalities, including wireless local area networking, also known as “Wi-Fi.” and Bluetooth.
The cellular phone device 116 can further include a location system for determining its location, such as GPS. Use of GPS by mobile devices is widespread and common around the world, and is used for a variety of location-based applications, including navigation, trip routing, mapping, and numerous other applications. In order to verify that the vehicle 112 is within the HOV lane 104, the tolling system defines location polygons defined by location coordinates. The location polygons are virtual objects that correspond to real areas. For example, several rectangle, such as rectangle 130, can be defined over the HOV lane 104. When the cellular phone device determines its location, it can compare the location to known location polygons provided by a service such as the tolling service. If the determined location is within the boundary of the location polygon then it is reasonably sure that the cellular phone device is in the physical area corresponding to the location polygon. Furthermore, many cellular phone devices sold today also include inertial measurement systems comprising multi-dimensional accelerometer arrays, as well as electronic compasses, that can be used to determine movement and changes in movement and direction, and which can be used to augment location determination and to facilitate faster location determinations.
In the case of the present example, cellular phone device 116 can receive a collection of polygon definitions from the toll service server 124, and compare its determined location to the set of defined location polygons. Location polygon definitions can be used to define toll lane maps, parking space maps, public/private roadway maps, and so on, and these can be delivered to the cellular phone device 116 as a map file. Since the car 112 in which the cellular phone device 116 travelling is moving, the location determination can have some error. However, the error will be small enough that it will still fall within location polygon 130 as it is travelling in lane 104, indicating it is within lane 104 and as such, the toll charged upon passing tolling point 128 is subject to any applicable discount, based on the number of occupants of vehicle 112. If the vehicle 112 does not have a required number of occupants to qualify for the HOV lane, then a penalty can be assessed in the same way as a toll is charged.
Alternatively, lane 104 can be a toll lane, such as, for example, an express lane. By restricting use of lane 104 to toll paying users, while lanes 106, 108, 110 remain free, fewer people will use lane 104, allowing traffic to flow faster and/or with less interruption. A charge based on the distance driven while in the toll lane 104 can be assessed like a toll. To enable the toll lane 104, a series of location polygons can be defined along the portion of toll lane 104 that is to be used as a toll lane. The cellular phone device 116, by use of a suitable tolling application program, can track the presence of the vehicle 112 in the toll lane 104 and a corresponding charge for the distance driven in the toll lane 104 can be determined. Likewise, just as the cellular phone device 116 can determine when its location is within the location polygons that define the toll lane 104, it can also determine when it has left the toll lane by no longer being present with the location polygons that define the toll lane 104. One of the advantages of defining an HOV lane or a toll lane by location polygons is the route of the lane can be dynamically changed by simply using location polygon corresponding to the active route of the HOV/toll lane.
In step 204 the cellular phone device can commence determining its present location using its satellite positioning system. This action should be repeated at intervals sufficient to ensure that the cellular phone device can detect when it is within a defined location polygon. In some embodiments the monitoring can be continuous, or the monitoring rate can be increased as the cellular phone device's location indicates it is getting closer to one or more defined location polygons.
In step 206 the cellular phone device can determine, for example, if the direction of travel and the route it is travelling indicates that it is approaching a defined HOV or tolling lane. The tolling lane can be defined by location polygons corresponding to the boundary of actual physical traffic lane that is being defined as a tolling lane. In step 208 the cellular phone device can use the defined HOV/tolling lane data file, which includes one or more defined location polygons corresponding to the physical location of the traffic lane being designated a HOV/tolling lane, to compare with the present location of the cellular phone device. At this point in the process the cellular phone device should be conducting location determinations at its maximum rate in order to ensure that the time in the HOV/tolling lane is accurate.
In step 210, the cellular phone device can determine, based on the comparison of step 208, whether the cellular phone device, and by inference, the vehicle in which it is located, is inside the HOV/tolling lane. If the location coordinates determined in step 210 are outside of the defined location polygons for the HOV/tolling lane, then no toll is charged as indicated in step 212 (and the method can return to step 210).
While the location determination and comparison in step 210 indicates the location is within the defined tolling polygons that correspond to the HOV/tolling lane, then in step 214 the distance travelled can be monitored and recorded in order to determine the toll to be charged. Once it is determined that the vehicle is in the HOV/tolling lane, then the method can proceed to step 216 (which can be a duplicate of step 210) where the cellular phone device monitors the location to determine where the vehicle has left the defined HOV/tolling lane, based on a comparison of the location with the location polygons that define the HOV/tolling lane location. Step 216 can be repeated as long as the location determination continues to fall within the defined location polygons.
When the determined location indicates the vehicle has left the HOV/tolling lane in step 216, then in step 218 there can be a determination as to whether the HOV/tolling lane has ended, or whether the vehicle has left the HOV/tolling lane before the end of the HOV/tolling lane. If the HOV/tolling lane ended, meaning vehicle has remained in a traffic lane but the HOV/tolling charge no longer applies, then in step 224 the tolling charge is stopped and a final total toll can be calculated and applied to the user's account. Any discounts for high occupancy can be applied to the final toll charge.
If, in step 218, it is determined that the vehicle has left the HOV/tolling lane early, then in some cases there may be a fine assessed for leaving the HOV/tolling lane early. In step 220 the method 200 determines whether there is a violation of a HOV/tolling lane rule for leaving the HOV/tolling lane before the end of the HOV/tolling lane. If there is a rule against leaving the HOV/tolling lane early, then in step 222 a violation is assessed, which can include an additional charge. If no rule applies then the tolling can simply stop by proceeding to step 224.
As shown here, the location polygons 306, 308, 310 are shown with distinct separation between each other, and from the boundaries 302, 304 of the traffic lane solely to show the location polygons clearly. In practice, the location polygons will abut each other, if not overlap each other, and can extend to the edges 302, 304 of the traffic lane. The location polygons will extend as long as the traffic lane remains relatively straight. If the traffic lane deviates by more than a threshold distance, then a new location polygon can be defined. Thus, location polygon 308 is defined where the traffic lane slightly changes direction from the area corresponding to location polygon 306, and likewise location polygon 310 is defined where the traffic lane again shifts direction. The same type of criteria be used to map location polygons along curves, corners, bends, etc.
At step 404 the start of a HOV/tolling lane can be identified, including a lane width between two points of latitude and longitude coordinates that will form vertices of a location polygon and the initial demarcation of the location polygon being defined. Generally it is assumed that the traffic lane continues in a straight direction, thus, in step 406, the method 400 looks for a deviation in the traffic lane from a straight line from the initial vertices/coordinates. If there is more than a threshold deviation from the straight line (e.g. 30 centimeters), then a new vertex can be defined in step 408, where new coordinates can be entered to indicate the end of one location polygon and the beginning of another. In step 410 the method 400 determines whether the end of the HOV/tolling lane being defined has been reached, and if so, the method 400 proceeds to step 412 in which the data file is completed and ready for distribution. The completed data file will include location data sets defining one or more location polygons that correspond to the physical location of traffic lane on a roadway. These location polygons can be used, for example, in method 200 for determining a toll to be charged for driving in a HOV/tolling lane.
When a temporary location polygon is used, a notice can be pushed out from the server to user's in the vicinity of the incident. In some cases the cellular phone device, as controlled by the tolling application program, may receive the notice, or periodically check for such notices, and upon detecting such a notice, download the temporary location polygon mapping for use in ensuring that the vehicle has not exited the HOV/tolling lane by going around the inoperative vehicle (or other obstacle) 518.
Similarly, toll users who have not entered the HOV/tolling lane 506, such as those driving in traffic lane 508, will not be charged a toll or violation for driving through the temporary location polygons 520, 522, 524 or 526. By being designated as temporary location polygons, they will only apply to vehicles that had previously entered polygon 514. However, if the vehicle then enters polygon portion 516, then the vehicle can be considered to have entered the HOV/tolling lane, and any violation or additional charge may be applied. It can be observed by those skilled in the art this is a flexible way to virtually and rapidly set HOV/tolling lanes not constraint by the infrastructure cost.
Once the temporary location polygons routing around an obstacle are received, then in step 606 the type of vehicle can be determined with respect to whether the vehicle is an autonomous vehicle (e.g. self-driving) or non-autonomous in steps 608, 610. An autonomous vehicle can be assumed to be connected to the cellular phone device or similar device, or even have such a device integrated into the autonomous vehicle. When the vehicle is a user-driven, non-autonomous vehicle that has a connection to the cellular phone device, or when the vehicle is an autonomous vehicle, then step 614 is followed to step 618, and the vehicle can indicate to the user that a temporary route is being followed to avoid the obstacle. Otherwise steps 612 to 616 are followed, and the cellular phone device will alert the user by, for example, vibrating an interior component (e.g. a steering wheel) or emitting an audible alert through the vehicle's audio system. In some embodiments voice prompts or commands can be issued over the vehicle's audio system as well.
In step 802 the method 800 commences by the cellular phone device routinely monitoring its location. The location fixes can be taken at relatively large intervals of time (e.g. 5-10 seconds or more). Once location monitoring has begun then in step 804 the method 800 determines whether the present location is within a threshold distance from a tolling location (e.g. a toll gantry) based on whether it has entered a space corresponding to any of several initial location polygons defined along the traffic lane ahead of the tolling location. Once the location of the vehicle is found to be in close proximity to the several initial location polygons, then the method proceeds to step 806 where the cellular phone device (or device making the location determinations) activates the tolling RFID of the toll transponder, and in step 808, the rate of GPS location determination can be increased. In step 810 the method 800 determines whether there is an HOV lane approaching in addition to the tolling location. The HOV lane can be a lane through the tolling location that provides a toll discount for qualifying vehicles. If there is an HOV lane through the tolling location then the method 800 proceeds to another section (“A”) that is shown in
However, if in step 818 it is determined that less than all of the location polygons were traversed by the determined locations of the vehicle, then the method proceeds alternatively to step 820 in which it is determined whether a threshold number of location polygons were traversed (e.g. a majority). If the minimum number of location polygons were traversed by the vehicle, then the it is assumed the vehicle did pass through the tolling location. If less than the minimum number of location polygons defined before and after the tolling location along the roadway passing through the tolling location were traversed by the vehicle, then it may be that the vehicle only passed near the tolling location (e.g. on a service road or other adjacent roadway not subject to a toll), and the method then proceeds to step 826 where no toll is charged, but a flag may be set on the account for further inquiry, such as examining photo records at the tolling location to see if the vehicle did pass through the tolling location, as is common.
Accordingly, to help determine whether the vehicle is accessing an HOV lane (or any special lane), in step 902 the tolling application program on the user's cellular phone device can access real time traffic data from other traffic related application programs, such as, for example, Google location, Waze, and similar applications on which other user's share their traffic data, including present speed and location. In step 904 the method determines whether the vehicle has entered the initial location polygons defined ahead of the tolling location. The method cycles iteratively through steps 904 and 906 until the vehicle enters and passes through the initial location polygons. In step 908 a comparison is made of the vehicle's speed, or the lane speed of the lane in which the vehicle is travelling, to that of other vehicles in adjacent lanes, assuming such information is available in step 902. If the vehicle is going faster than nearby vehicles, then it can be assumed that the vehicle is using the special or HOV lane and proceed to steps 912 and 914. Step 912 is an optional step that can be used to augment detection of entering a special or HOV lane based on inertial measurements provided by, for example, an accelerometer unit in the cellular phone device, if the cellular phone device includes such a unit. For example, in step 916, the cellular phone device can detect acceleration as the vehicle passes through location polygons ahead of the tolling location. Furthermore, the angular rate of change can be monitored as well (assuming the cellular phone device is not being moved within the vehicle) in step 918. If the angular rate of travel is determined in step 920 to be to the left (or right in British or British legacy countries), then the method can proceed to step 922. In step 922 the number of standard and HOV lanes are examined along with the general direction of the roadway to determine if the angular rate of change is consistent with a lane change to an HOV lane or whether it is consistent with staying along a defined traffic lane. In step 924 if the comparison of step 922 indicates a lane change to a special or HOV lane then the method proceeds to step 914, as would be the case if step 912 is skipped or not applicable. In step 914 the user is charged a toll based on the HOV status of the vehicle (e.g. number of occupants). From step 914 the method proceeds to step 926 in which the method monitors whether the vehicle has passed through the last location polygons beyond the tolling location, and if so, then in step 928 the method resumes ordinary location determination operation as in step 928. Likewise, lane to lane changes can be detected using the GPS bearing difference, as shown in
In chart 1502 there is initially a positive-going excursion 1510 consistent with going to the left, followed by a negative going excursion 1512 consistent with going to the right, as would be the case with a left-ward lane change. In the chart 1502 the negative excursion immediately follows the positive excursion, but there can be a delay between them, such as would occur, for example, if the vehicle crossed several lanes. Likewise, in chart 1508, there is first a negative-going excursion 1514 followed by a positive-going excursion 1516 consistent with a right-ward lane change. These outputs coupled with the use of location polygons can allow a determination as to whether a vehicle is entering (or exiting) a specific traffic lane that may result in a toll or other charge.
However if, in step 1806, it is determined than there is a HOV lane ahead, then in step 1810 the output of the inertial measurement system can be monitored to detect lane changes by looking for excursions indicating left or right movement. Alternatively, or conjunctively, the GPS bearing information can be determined to derive changes in direction. In step 1812 the method 1800 looks for indications of a lane change in the output of the inertial measurement system. If a lane change is indicated, then in step 1814 a determination is made as to the direction of the lane change, either left or right. A lane counter can be used to indicate a present lane in which the vehicle is travelling. The lane counter can be a variable maintained in memory by the cellular phone device. Thus, for left-going lane changes in step 1816 the lane counter is incremented, and for right-going lane changes in step 181 the lane counter is decremented. The lane counter is maintained in step 1820. In step 1822 a determination is made as to whether the vehicle has crossed enough lanes to be in an HOV lane, as well as whether the vehicle has passed through location polygon corresponding to the HOV or express lane entrance. In step 1824 the method 1800 determines whether the vehicle has crossed an exit, and if not then the monitoring continues (return to step 1810). If in step 1822 the vehicle has crossed enough lanes to be in an HOV lane, then in step 1828 a determination is made as to whether the last lane crossing occurred prior to or at the location corresponding to the entrance location polygon of a set of location polygons defining the HOV lane. If not, then it means the vehicle has improperly entered the HOV lane and a violation may be assessed in step 1828. If the vehicle did properly enter the HOV lane, then two actions are taken. First, in step 1836, and toll can be charged. Second, in step 1832 the method monitors to ensure that the vehicle properly remains in the HOV lane by determining whether the vehicle has changed lanes to the right before passing a location polygon indicating the end of the HOV lane. If a right-going lane change occurred, and in step 1832 it occurred prior to the vehicle passing through the location defined by an exit location polygon, then a violation may be assessed in step 1834. If the exit location polygon was passed prior to the right-going lane change, then the HOV lane monitoring process is finished in step 1838. Those skilled in the art will appreciate that, although the flow chart diagram suggests a linear flow, the various blocks/steps can represent processes that can occurs in parallel. For example, in steps 1828 and 1832, the method 1800 can still detect lane changes in step 1810 and increment or decrement the lane counter 1820.
In addition to tolling and HOV lane monitoring, the use of location polygons can be applied to numerous other applications. Some other applications considered here include parking, road use charging, and retail drive-up delivery. Other applications within the scope of the disclosed embodiments may further occur to those skilled in the art.
The method 1400 can used for a variety of retail services, including foodservice, pharmaceutical, and other goods. It is further contemplated that, rather than ordering while parked or at the retail location, a person can place an order prior to arriving at the retail location, and the detection of the vehicle in a parking space of the retail location can automatically trigger a message being sent to the retail location that includes, for example, an order number, the name of the person who placed the order, and the present parking spot in which the person is parked. In response to receiving the message, the retail location can verify the order and the identity of the person placing the order, and deliver the goods to the person in the indicated parking space.
Those skilled in the field of the present disclosure will appreciate that elements in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale. For example, the dimensions of some of the elements in the figures may be exaggerated relative to other elements to help to improve understanding of embodiments of the present invention.
The apparatus and method components have been represented where appropriate by conventional symbols in the drawings, showing only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein. The details of well-known elements, structure, or processes that would be necessary to practice the embodiments, and that would be well known to those of skill in the art, are not necessarily shown and should be assumed to be present unless otherwise indicated.
The benefits, advantages, solutions to problems, and any element(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential features or elements of any or all the claims. The invention is defined solely by the appended claims including any amendments made during the pendency of this application and all equivalents of those claims as issued.
Moreover in this and the related documents field herewith, relational terms such as first and second, top and bottom, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms “comprises,” “comprising,” “has”, “having,” “includes”, “including,” “contains”, “containing” or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises, has, includes, contains a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by “comprises . . . a”, “has . . . a”, “includes . . . a”, “contains . . . a” does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises, has, includes, contains the element. The terms “a” and “an” are defined as one or more unless explicitly stated otherwise herein. The terms “substantially”, “essentially”, “approximately”, “about” or any other version thereof, are defined as being close to as understood by one of ordinary skill in the art, and in one non-limiting embodiment the term is defined to be within 10%, in another embodiment within 5%, in another embodiment within 1% and in another embodiment within 0.5%. The term “coupled” as used herein is defined as connected, although not necessarily directly and not necessarily mechanically. A device or structure that is “configured” in a certain way is configured in at least that way, but may also be configured in ways that are not listed.
It will be appreciated that some embodiments may be comprised of one or more generic or specialized processors (or “processing devices”) such as microprocessors, digital signal processors, customized processors and field programmable gate arrays (FPGAs) and unique stored program instructions (including both software and firmware) that control the one or more processors to implement, in conjunction with certain non-processor circuits, some, most, or all of the functions of the method and/or apparatus described herein. Alternatively, some or all functions could be implemented by a state machine that has no stored program instructions, or in one or more application specific integrated circuits (ASICs), in which each function or some combinations of certain of the functions are implemented as custom logic. Of course, a combination of the two approaches could be used.
Moreover, an embodiment can be implemented as a computer-readable storage medium having computer readable code stored thereon for programming a computer (e.g., comprising a processor) to perform a method as described and claimed herein. Examples of such computer-readable storage mediums include, but are not limited to, a hard disk, a CD-ROM, an optical storage device, a magnetic storage device, a ROM (Read Only Memory), a PROM (Programmable Read Only Memory), an EPROM (Erasable Programmable Read Only Memory), an EEPROM (Electrically Erasable Programmable Read Only Memory) and a Flash memory. Further, it is expected that one of ordinary skill, notwithstanding possibly significant effort and many design choices motivated by, for example, available time, current technology, and economic considerations, when guided by the concepts and principles disclosed herein will be readily capable of generating such software instructions and programs and ICs with minimal experimentation.
The following claims are hereby incorporated into the description as part of the original disclosure, and remain so even if cancelled from the claims during prosecution of the application, with each claim standing on its own as a separately claimed subject matter. Furthermore, subject matter not shown should not be assumed to be necessarily present, and that in some instances it may become necessary to define the claims by use of negative limitations, which are supported herein by merely not showing the subject matter disclaimed in such negative limitations.
This application claims the benefit of provisional application No. 62/611,973, the disclosure of which is hereby incorporated by reference.
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