Leveraging ultra-wideband door locks in collocated ultra-wideband services

Abstract

A method of using an ultra-wideband (UWB) device is disclosed. The method includes obtaining ranging data from one or more UWB door lock responders, determining an area location of the UWB device based on the ranging data, and communicating with a downlink Time Difference of Arrival (DL-TDoA) system based on the area location, where the DL-TDoA system includes a plurality of DL TDoA Anchors (DT-Anchors).

Description

Docket No. 62306.208W001 (P241670-WO-UTL)LEVERAGING ULTRA -WIDEBAND DOOR LOCKS IN COLLOCATED ULTRA-WIDEBAND SERVICESInventors: Christophe LE THIERRY, Guillaume VIVIERCROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the priority benefit under 35 U.S.C. §119(e) of U.S. Provisional Patent Application No. 63 / 809,833 filed 21 May 2025, entitled “LEVERAGING ULTRE-WIDEBAND DOOR LOCKS IN COLLOCATED ULTRA-WIDEBAND SERVICES”, and U.S. Provisional Patent Application No. 63 / 730,761, filed 11 December 2024, entitled “LEVERAGING ULTRA-WIDEBAND DOOR LOCKS IN COLLOCATED OPERATING ULTRA- WIDEBAND SERVICES”, each of which is incorporated by reference as though fully set forth herein.TECHNICAL FIELD

[0002] The present disclosure relates generally to ultra-wideband (UWB) wireless communication technology and, more specifically, to systems, devices, methods, and computer-readable media for leveraging UWB door locks in collocated operating UWB services.BACKGROUND

[0003] DL-TDoA (Downlink Time Difference of Arrival) is an ultra-wideband (UWB) feature which enables a UWB device to accurately determine its position without being tracked. An analogy can be drawn from GNSS systems (global navigation satellite systems) in which a device can compute its location by processing messages sent by a constellation of satellites. In a UWB DL-TDoA system, an infrastructure of “satellites” also often referred to as “anchors” is deployed and broadcasts messages that UWB devices can use to compute their location. In the following those UWB satellites or anchors may be referred to as “DT-Anchors” (DL-TDoA Anchors) to clearly distinguish them from a “DT-Tag” (DL-TDoA Tag), which may refer to a UWB device deriving its location from the messages sent by the infrastructure made of DT- Anchors. DL-TDoA is a key enabler of inside positioning.

[0004] A DL-TDoA network may be composed of multiple DT-Anchors organized as clusters and distributed over a possibly large deployment area. A cluster may refer to a set of DT-Anchors that exchange DTMs (DL-TDoA Messages) to provide a positioning service to4902-8493-0671 v.2 1Docket No. 62306.208W001 (P241670-WO-UTL)DT-Tags in the specific area covered by the cluster. The cluster may include one initiator DT- Anchor and one or more responder DT-Anchors. A device (acting as a DT-Tag) may then be able to anonymously locate within this area by listening to the messages (Poll DTM, Response DTM, Final DTM) sent by DT-Anchors.

[0005] Another technology that uses UWB communication is smart door looks being standardized by the Connectivity Standard Alliance (CSA). In some examples, UWB ranging may be used by a UWB door lock to measure distances with UWB devices and detect the intention of a user to cross the door. Some UWB devices are being considered that include DT- Tag functionality and functionality to interact with UWB door locks. However, there has heretofore been little to no work done on how these technologies may be leveraged together.SUMMARY

[0006] Embodiments of the present disclosure include positioning systems and techniques.

[0007] One inventive aspect is a method of using an ultra-wideband (UWB) device, the method including obtaining ranging data from one or more UWB door lock responders, determining an area location of the UWB device based on the ranging data, and communicating with a downlink Time Difference of Arrival (DL-TDoA) system based on the area location, where the DL-TDoA system includes a plurality of DL TDoA Anchors (DT-Anchors).

[0008] In some embodiments, the method further includes the obtaining ranging data includes performing a ranging operation with the one or more UWB door lock responders to obtain the ranging data.

[0009] In some embodiments, the method further includes communicating with the DL- TDoA system includes determining whether to receive and process data received from the DT- Anchors based on the area location of the UWB device.

[0010] In some embodiments, the method further includes storing a deployment configuration, where the deployment configuration includes, for each particular DT-Anchor, an identification of one or more ranging rounds during which the particular DT-Anchor performs DTM transmissions, and where determining whether to receive and process data received from the DT-Anchors is based in part on the deployment configuration.

[0011] In some embodiments, the method further includes determining whether the UWB device is inside or outside based on the area location, and changing a setting of the UWB device based on whether the UWB device is inside or outside.4902-8493-0671 v.2 2Docket No. 62306.208W001 (P241670-WO-UTL)

[0012] In some embodiments, the method further includes determining whether the UWB device is in an unauthorized location based on the area location of the UWB device.

[0013] In some embodiments, the method further includes determining a location of the UWB device based on the communicating with the DL-TDoA system.

[0014] In some embodiments, the method further includes the area location identifies a room, and where the communicating with the DL-TDoA system includes identifying a set of DT-anchors of the plurality of DT-anchors located in the room, and performing ranging rounds only with the set of DT-anchors to determine the location.

[0015] In some embodiments, the method further includes the UWB device stores a deployment configuration, where the deployment configuration includes for each of the plurality of DT-anchors, a corresponding room, and for each of the one or more UWB door lock responders, a corresponding frontside room and a corresponding backside room, where the area location is further based on the deployment configuration, and where the identifying the set of DT-anchors includes accessing the deployment configuration to determine which of the plurality of DT-anchors is located in the room.

[0016] In some embodiments, the method further includes accessing a deployment configuration characterizing the DT-Anchors and the UWB door lock responders, and updating the deployment configuration based on the area location. In some embodiments, the area location identifies a first room of a plurality of rooms, and communicating with the DL-TDoA system includes: identifying and filtering out a set of DT-anchors of the plurality of DT-anchors located in the plurality of rooms but not in the first room, and, to determine the location, performing ranging rounds with the plurality of DT-anchors but excluding the filtered -out set of DT-anchors. In some embodiments, the method further includes storing a deployment configuration that includes, for each particular DT-Anchor, an identification of one or more ranging rounds during which the particular DT-Anchor performs DL-TDoA Message (DTM) transmissions, and wherein determining whether to perform a ranging round of the ranging operation is based in part on the deployment configuration.

[0017] Another inventive aspect is a wireless communication device including a transceiver, and a processor coupled to the transceiver and configured to obtain ranging data from one or more UWB door lock responders, determine an area location of the wireless communication device based on the ranging data, and communicate with a downlink Time4902-8493-0671 v.2 3Docket No. 62306.208W001 (P241670-WO-UTL)Difference of Arrival (DL-TDoA) system based on the area location, where the DL-TDoA system includes a plurality of DL TDoA Anchors (DT-Anchors).

[0018] The wireless communication device of claim 11, the obtain ranging data includes perform a ranging operation with the one or more UWB door lock responders to obtain the ranging data.

[0019] In some embodiments, the wireless communication device further includes communicating with the DL TDoA system includes determining whether to receive and process data received from the DT-Anchors based on the area location of the wireless communication device.

[0020] In some embodiments, the wireless communication device further includes a memory configured to store a deployment configuration, where the deployment configuration includes, for each particular DT-Anchor, an identification of one or more ranging rounds during which the particular DT-Anchor performs DTM transmissions, and where determining whether to receive and process data received from the DT-Anchors is based in part on the deployment configuration.

[0021] In some embodiments, the wireless communication device further includes the processor is further configured to determine whether the wireless communication device is in an unauthorized location based on the area location of the wireless communication device.

[0022] In some embodiments, the wireless communication device further includes the processor is further configured to determine a location of the wireless communication device based on the communicating with the DL-TDoA system.

[0023] In some embodiments, the wireless communication device further includes the area location identifies a room, and where the communicating with the DL-TDoA system includes identifying a set of DT-anchors of the plurality of DT-anchors located in the room, and performing ranging rounds only with the set of DT-anchors to determine the location.

[0024] In some embodiments, the wireless communication device further includes a memory, where the memory is configured to store a deployment configuration, where the deployment configuration includes for each of the plurality of DT-anchors, a corresponding room, and for each of the one or more UWB door lock responders, a corresponding frontside room and a corresponding backside room, where the area location is further based on the4902-8493-0671 v.2 4Docket No. 62306.208W001 (P241670-WO-UTL) deployment configuration, and where the identifying the set of DT-anchors includes accessing the deployment configuration to determine which of the plurality of DT-anchors is located in the room.

[0025] In some embodiments, the wireless communication device further includes a memory, where the memory is configured to store a deployment configuration characterizing the DT-Anchors and the UWB door lock responders, and where the processor is further configured to access the deployment configuration, and update the deployment configuration based on the area location.

[0026] Another inventive aspect is a non-transitory computer-readable medium (CRM) having program code recorded thereon, the program code including code for causing an ultra- wideband (UWB) device to obtain ranging data from one or more UWB door lock responders, code for causing the UWB device to determine an area location of the UWB device based on the ranging data, and code for causing the UWB device to communicate with a downlink Time Difference of Arrival (DL-TDoA) system based on the area location, where the DL-TDoA system includes a plurality of DL TDoA Anchors (DT-Anchors).

[0027] In some embodiments, the non-transitory CRM further includes the obtained ranging data includes perform a ranging operation with the one or more UWB door lock responders to obtain the ranging data.

[0028] In some embodiments, the non-transitory CRM further includes communicating with the DL TDoA system includes determining whether to receive and process data received from the DT-Anchors based on the area location of the UWB device.

[0029] In some embodiments, the non-transitory CRM further includes code for causing the UWB device to access a deployment configuration, where the deployment configuration includes, for each particular DT-Anchor, an identification of one or more ranging rounds during which the particular DT-Anchor performs DTM transmissions, and where determining whether to receive and process data received from the DT-Anchors is based in part on the deployment configuration.

[0030] In some embodiments, the non-transitory CRM further includes code for causing the UWB device to determine whether the UWB device is in an unauthorized location based on the area location of the UWB device.4902-8493-0671 v.2 5Docket No. 62306.208W001 (P241670-WO-UTL)

[0031] In some embodiments, the non-transitory CRM further includes code for causing the UWB device to determine a location of the UWB device based on the communicating with the DL-TDoA system.

[0032] In some embodiments, the non-transitory CRM further includes the area location identifies a room, and where the communicating with the DL-TDoA system includes identifying a set of DT-anchors of the plurality of DT-anchors located in the room, and performing ranging rounds only with the set of DT-anchors to determine the location.

[0033] In some embodiments, the non-transitory CRM further includes the non-transitory CRM further records a deployment configuration, where the deployment configuration includes for each of the plurality of DT-anchors, a corresponding room, and for each of the one or more UWB door lock responders, a corresponding frontside room and a corresponding backside room, where the area location is further based on the deployment configuration, and where the identifying the set of DT-anchors includes accessing the deployment configuration to determine which of the plurality of DT-anchors is located in the room.

[0034] In some embodiments, the non-transitory CRM further includes the non-transitory CRM further records a deployment configuration characterizing the DT- Anchors and the UWB door lock responders, where the program code further includes code for causing the UWB device to access the deployment configuration, and code for causing the UWB device to update the deployment configuration based on the area location.

[0035] Additional aspects, embodiments, implementations, features, and advantages of the present disclosure will become apparent from the following detailed description.BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Illustrative embodiments of the present disclosure will be described with reference to the accompanying drawings, of which:

[0037] Figure 1 illustrates a protocol diagram of a method of using a UWB device with DT- Anchors to determine a location of the UWB device according to aspects of the present disclosure.

[0038] Figure 2 illustrates an example of a deployment of DT-Anchors, UWB door locks, and a UWB device according to aspects of the present disclosure.4902-8493-0671 v.2 6Docket No. 62306.208W001 (P241670-WO-UTL)

[0039] Figure 3 illustrates a schematic block diagram of a UWB device according to aspects of the present disclosure.

[0040] Figure 4 illustrates an example of a deployment of a UWB device and UWB door locks, according to aspects of the present disclosure.

[0041] Figure 5 A illustrates an example of a deployment of DT- Anchors, UWB door locks, and a UWB device according to aspects of the present disclosure.

[0042] Figure 5B illustrates a protocol diagram of a method of using UWB door lock communications to select DT-Anchors according to aspects of the present disclosure.

[0043] Figure 6 illustrates a protocol diagram of a method of using UWB door lock communications to adjust UWB device settings according to aspects of the present disclosure.

[0044] Figure 7 illustrates a protocol diagram of a method of using UWB door lock communications to report location data according to aspects of the present disclosure.

[0045] Figure 8 illustrates a protocol diagram of a method of using UWB door lock communications to supplement DT-Anchor data according to aspects of the present disclosure.

[0046] Figure 9 illustrates an example of a deployment of DT-Anchors, UWB door locks, and a UWB device according to aspects of the present disclosure.

[0047] Figure 10 illustrates an example method of UWB device operation, according to some aspects of the present disclosure.DETAILED DESCRIPTION

[0048] For the purposes of promoting an understanding of the principles of the present disclosure, reference will now be made to the embodiments illustrated in the drawings, and specific language will be used to describe the same. It is nevertheless understood that no limitation to the scope of the disclosure is intended. Any alterations and further modifications to the described devices, systems, and methods, and any further application of the principles of the present disclosure are fully contemplated and included within the present disclosure as would normally occur to one skilled in the art to which the disclosure relates. In particular, it is fully contemplated that the features, components, and / or steps described with respect to one embodiment may be combined with the features, components, and / or steps described with respect to other embodiments of the present disclosure. For the sake of brevity, however, the numerous iterations of these combinations will not be described separately.

[0049] As discussed in further detail below, embodiments discussed herein relate to UWB wireless communication devices that have both DT-Tag functionality (e.g., to communicate with DT-Anchors) and UWB door lock initiator functionality (e.g., to communicate with UWB door lock responders). The UWB wireless devices may store a deployment configuration that4902-8493-0671 v.2 7Docket No. 62306.208W001 (P241670-WO-UTL) includes information about the layout of UWB door locks and DT- Anchors in a given area or general location. Deployment configuration data regarding one type of system may be leveraged when communicating with the other type of system to improve performance as discussed herein. Communicating with both DT-Anchors and UWB door locks, with the ability to leverage deployment configuration about each type of system (e.g., DL-TDoA and UWB door locks) allows for devices to, for example, determine current device location information with reduced power consumption, improved accuracy, improved reliability, and improved security.

[0050] Ultra-Wideband (UWB) is a wireless communication technology that generally uses a wide bandwidth, typically about 500 MHz or larger, or has a 10 dB bandwidth greater than 20% of the center frequency [as defined e.g. in ITU-R SM. 1755-0: “Characteristics of ultra- wideband technology”, ITU, 2006].

[0051] DL-TDoA (Downlink Time Difference of Arrival) is a UWB feature which enables a UWB device to accurately determine its position without being tracked. An analogy can be drawn from GNSS systems (global navigation satellite systems) in which a device can compute its location by processing messages sent by a constellation of satellites. In a UWB TDoA system, an infrastructure of “satellites” also often referred to as “anchors” is deployed and broadcasts messages that UWB devices can use to compute their location. In the following, those UWB satellites or anchors will be generally be referenced as “DT-Anchors” or “DL- TDoA Anchors” or “Anchors” to clearly distinguish them from the “DT-Tag”, or “DL-TDoA Tag,” or “Tag”, which is part of a UWB device deriving its location from the messages sent by the infrastructure made of DT-Anchors. DL-TDoA is a key enabler of indoor positioning.

[0052] Reference is made to Figure 1, which illustrates a protocol diagram of a method of using a UWB device with DT-Anchors to determine a location of the UWB device according to aspects of the present disclosure. A DL-TDoA network may include multiple DT-Anchors organized as clusters and distributed over a possibly large deployment area. A cluster may be a set of DT-Anchors that transmit or exchange DTMs (DL-TDoA Messages) to provide a positioning service to the DT-Tags in the specific area covered by the cluster. The cluster may include or consist of one initiator DT-Anchor and one or more responder DT-Anchors, as illustrated in Figure 1, for example (which illustrates an Initiator DT-Anchor communicating with a DT-Tag and up to N responder DT-Anchors, illustrated as Responder DT-Anchor 1 to Responder DT-Anchor 2).

[0053] As understood in the art, a device having a DT-Tag (such as illustrated in Figure 1) is able to anonymously locate within this area by receiving the messages (e.g., Poll DTM,4902-8493-0671 v.2 8Docket No. 62306.208W001 (P241670-WO-UTL)Response DTM, Final DTM) sent by DT-Anchors, as shown in Figure 1. In some embodiments, the poll DTM and response DTMs are considered to be mandatory messages, e.g., according to a technology standard, and a final DTM is considered to be an optional message.Standardization of UWB door locks

[0054] CSA (Connectivity Standards Alliance) / Aliro is standardizing a protocol allowing UWB devices to seamlessly unlock doors. UWB ranging is used by the UWB door lock to measure distances with UWB devices and detect the intention of a user to cross the door.

[0055] Some embodiments discussed herein include enhanced UWB devices, which are capable of using ranging results determined with UWB door locks to determine current position or to improve DL-TDoA based inside localization.

[0056] Some embodiments use results of ranging operations with UWB door locks, for example, in order to optimize power consumption during DL-TDoA positioning, for example, by allowing a UWB device to receive during relevant ranging rounds. Some embodiments have advantageous location accuracy, for example, by using ranging results with nearby UWB door locks, and by not using transmissions from certain, for example, unreliable, DTMs from DT- Anchors.Virtual UWB door locks

[0057] Some embodiments provide positioning service, for example, by ranging with “Virtual UWB door locks,” for example, when there is no DL-TDoA coverage. Virtual UWB door locks include any UWB capable system, device, component, or the like which is configured to perform a ranging operation with a UWB device, for example, as a responder or an initiator, which, in the CSA / Aliro context may be respectively referred to as a Responder and an Initiator. Accordingly, a virtual UWB door lock may not control a locking mechanism for a door. As used herein, the term UWB door lock may refer to a UWB door lock which includes locking mechanism control and / or may refer to a virtual UWB door lock which does not control a locking mechanism.

[0058] In some embodiments, DT-Anchors may not be deployed in every room of the TDoA system, for example for the following reasons: A) to save cost: it may be unnecessary to deploy DT-Anchors in rarely frequented rooms, B) due to regulation: it may not be allowed to cover some areas with DT-Anchors (e.g., an area connecting two inside spaces such a such an outside4902-8493-0671 v.2 9Docket No. 62306.208W001 (P241670-WO-UTL) terrasse). Similarly, the spatial density of DT-anchors can vary from room to room. As a result, the accuracy of the positioning may be variable from one room to the other.

[0059] At least to address those issues, virtual UWB door locks may be installed, for example, at doors connecting adjacent rooms or spaces where access control between the rooms or spaces is not needed. In some embodiments, virtual UWB door locks may be located at other positions. Accordingly, UWB door lock ranging operations may be used to allow UWB devices to determine their position in areas where DL-TDoA is not available or less accurate.Example of Deployment of DT-Anchors and UWB door locks

[0060] Figure 2 illustrates an example of a deployment 200 of DT-Anchors and UWB door locks according to aspects of the present disclosure. As an example, and without being limited to any certain number of anchors or door locks, Figure 2 illustrates DT-Anchor 1 through DT- Anchor 10 (labeled as 202, 204, 206, 208, 210, 212, 214, 216, 218, 220, respectively), arranged in three rooms of a building, labeled as Room 1, Room 2, and Room 3. The deployment further includes Door Lock 1, Door Lock 2, and Door Lock 3 as shown (further labeled as 232, 234, and 236, respectively). Figure 2 also illustrates a UWB device 240 within the area of the deployment 200. More generally, DT-Anchors are deployed in each room, and UWB door locks are placed at doors connecting some of the rooms. In some embodiments, the UWB device, the DT-Anchors, and the UWB door locks are in communication with one or more network systems or infrastructures, for example, using Wi-Fi or BLE communication protocols. For convenience in this disclosure, the names of the elements in Figure 2 are used mainly herein rather than the associated reference numeral.UWB device architecture

[0061] Figure 3 illustrates a schematic block diagram of a UWB device 300 according to aspects of the present disclosure. The UWB device 300 is configured to communicate with UWB door locks 350 as or with door lock responders, for example, as or with a door lock initiator. The UWB device 300 is further configured to receive DTM transmissions from DT- Anchors 360, for example, or with a DT-Tag.

[0062] UWB device 300 includes a transceiver 310, a processor 320 including or functioning as a door lock initiator 323 and a DT-Tag 325, and a memory 330. The processor 320 may be programmed to support communication with UWB door locks 350 as a door lock initiator 323, compliant, for example, to Aliro standard. The processor 320 may be programmed to support DL-TDoA communications from DT- Anchors 360 as a DT-Tag 325, as defined, for4902-8493-0671 v.2 10Docket No. 62306.208W001 (P241670-WO-UTL) example, by FiRa (fine ranging consortium) or Omlox standardization bodies. The memory 330 stores, for example, a deployment configuration that includes data related to, for example, the positioning and other characteristics of DL-TDoA anchors and door locks in the vicinity, as discussed in more detail below. The memory 330 may also store non-transient instructions, which, when provided to and executed by the processor 320 cause the UWB device 300 to perform at least the functions described herein, as well as other related operations.

[0063] Memory 330 may include one or more non-transitory storage devices that may include local and / or network accessible storage, a disk drive, a drive array, an optical storage device, a solid-state storage device such as a random access memory (“RAM”) and / or a readonly memory (“ROM”), a programmable ROM, a flash-updateable ROM, and / or the like. Such storage devices may be configured to implement any appropriate data storage, including without limitation, various file systems, database structures, and / or the like. The memory 330 may be used for storing programming instructions and other computer code for carrying out various steps (e.g., of a UWB device) described herein. The memory 330 may be a non- transitory computer-readable medium.

[0064] Processor 320 uses transceiver 310 to receive communication information from DT- Anchors 360 and to communicate bidirectionally with UWB door locks 350. Processor 320 may, for example, be implemented in one or more general purpose programmable processing units, in one or more application specific integrated circuits, and / or in one or more other circuits configured to perform the functions discussed herein.

[0065] The door lock initiator 323 and the DT-Tag 325 are configured to have access to the deployment configuration. In addition, door lock initiator 323 and the DT-Tag 325 may be configured to communicate with each other to allow the use cases described further herein. For example, in some embodiments, the door lock initiator 323 indicates to the DT-Tag 325 information about a current room. In some embodiments, the door lock initiator 323 generates the ranging results. In some embodiments, the DT-Tag 325 requests the door lock initiator 323 to start ranging. In some embodiments, instead of direct communication between the DT-Tag 325 and the door lock initiator 323, another layer or controlling component may coordinate operation of the door lock initiator 323 and the DT-Tag 325.Deployment Configurations

[0066] In some embodiments, a deployment configuration of DT-Anchors and / or UWB door locks may be provided to UWB devices, for example, by a system configured to communicate with the UWB device with a network. A deployment configuration may also be4902-8493-0671 v.2 11Docket No. 62306.208W001 (P241670-WO-UTL) referred to as deployment configuration data. In some embodiments, a deployment configuration is provided to the UWB devices using communication protocols similar or identical to those used to communicate latitude, longitude, and altitude (or floor level) of a DT- Anchor. For example, the deployment configuration may be communicated to UWB devices as a new parameter of the DL-TDoA profile, for example, via Wi-Fi or Bluetooth. In some embodiments, the deployment configuration may be provided to UWB devices as new parameters of the Poll DTM and Response DTM transmitted by the DT-Anchors. In some embodiments, the deployment configuration may be provided to UWB devices using out of band transmissions, for example, by an application server. In some embodiments, the deployment configuration data may be provided to UWB devices by an application running on the UWB device. In some embodiments, deployment configuration data for each UWB door lock is advertised by the UWB door locks, for example, via Wi-Fi or BLE, and received by UWB devices in range. In some embodiments, deployment configuration data for each UWB door lock may be received by the UWB devices using out of band transmissions from, for example, an application server.

[0067] Other mechanisms for providing the deployment configuration may be additionally or alternatively be used.

[0068] In some embodiments, the deployment configuration includes data for each DT- Anchor. For example, the deployment configuration may include data indicating which room each DT-Anchor is installed in. In some embodiments, the deployment configuration includes data indicating, for each particular DT-Anchor, one or more ranging rounds during which the particular DT-Anchor performs DTM transmissions.

[0069] As an example, the deployment configuration for the DT-Anchors of deployment 200 of DT-Anchors and UWB door locks illustrated in Figure 2 may include the following information:4902-8493-0671 v.2 12Docket No. 62306.208W001 (P241670-WO-UTL)

[0070] The deployment configuration data for each UWB door lock may, for example, include which room is associated with the Frontside of the UWB door lock, which room is associated with the Backside of the UWB door lock, whether the Frontside of the UWB door lock is inside or outside, and whether the Backside of the UWB door lock is inside or outside.

[0071] As an example, the deployment configuration data for the UWB door locks of deployment 200 of DT-Anchors and UWB door locks illustrated in Figure 2 may include the following information:

[0072] In some embodiments, the deployment configuration data also includes data characterizing geometric aspects of the environment. For example, the deployment configuration data may also characterize room features, such as positions, lengths, heights, geometries, and other geometric features of walls, ceilings, pillars, and other building features.

[0073] Because of the possibly large number of DT-Anchors in a given place, such as a large shopping mall, the deployment configuration data of an entire network may be quite large and may consume significant memory in a UWB device. Accordingly, in some embodiments, deployment configuration data limited to that which is currently relevant for each UWB device,4902-8493-0671 v.2 13Docket No. 62306.208W001 (P241670-WO-UTL) e.g., the information associated with the DT-Anchors located in the vicinity of each UWB device may be provided to each UWB device.Certain features of various elements

[0074] The door lock initiator may communicate with door locks responders.

[0075] The DT-Tag may receive DTM transmissions from DT-Anchors.

[0076] The door lock initiator and the DT-Tag may have access to the deployment configuration data and may communicate with each other. For example, the door lock initiator may indicate to the DT-Tag information related to a current location and may provide ranging data from a ranging operation to the DT-Tag. In some embodiments, the DT-Tag may request that the door lock initiator start a ranging operation.

[0077] In some embodiments, the data related to a current location, as identified, for example, based on results of a ranging operation is used by the UWB device to selectively receive and process transmissions from particular DT-Anchors during particular ranging rounds associated with the particular DT-Anchors. In some embodiments, the data related to a current location, as identified, for example, based on results of a ranging operation is used by the UWB device to improve location accuracy, for example, by using ranging results from nearby UWB door locks, and by ignoring unreliable DTMs from DT-Anchors. In some embodiments, the data related to a current location, as identified, for example, based on results of a ranging operation is used by the UWB device to detect when a UWB device has entered a specific area (e.g., an unauthorized area), and start monitoring or reporting the UWB device’s location (e.g., via UL-TDoA or DL-TDoA). In some embodiments, the data related to a current location, as identified, for example, based on results of a ranging operation is used by the UWB device to adjust transmission power of the UWB device according to, for example, jurisdictional regulation limits.Identification of room based on UWB door lock ranging

[0078] The deployment configuration data discussed above may be used by a UWB device to determine with a high reliability in which room the UWB device is currently located. For example, a ranging operation performed by or with one or more UWB door locks may identify the room in which the UWB device is currently located at least partly based on the deployment configuration data.

[0079] Figure 4 illustrates an example of a deployment of UWB devices and UWB door locks, according to aspects of the present disclosure. The UWB devices in Figure 4 are labeled4902-8493-0671 v.2 14Docket No. 62306.208W001 (P241670-WO-UTL) as UWB device 1 , UWB device 2, and UWB device 3 as shown, and the door locks are labeled as Door Lock 2 and Door Lock 3 as shown. The UWB devices 1 through 3 may be configured as UWB device 300 in Figure 3, as an example.

[0080] Referring to Figure 4, UWB device 1 may receive the following ranging data from a ranging operation with or by UWB door lock 3 :Distance (derived from the reported ToF (time of flight)): 3 meters Angle of Arrival: 335 degrees (assuming 0 degrees is the up in Figure 3) Side: Backside

[0081] According to the stored deployment configuration data stored for UWB door lock 3, the Backside of UWB door lock 3 is associated with room 2. In addition, the combination of the distance and angle of arrival can additionally or alternatively be used with the stored deployment configuration data to determine that the UWB device is located in room 2. Therefore, UWB device 1 is able to determine that it is located within room 2 based on the ranging data and the deployment configuration data.Multiple Responders per UWB door lock

[0082] In some embodiments, one or more UWB door locks have a single responder. In some embodiments, one or more UWB door locks have multiple responders. For example, in Figure 4, UWB door lock 3 may have multiple responders. Furthermore, the ranging data from each of the responders of UWB door lock 3 may be used by the UWB device, for example, to identify a current room. The redundant data of multiple ranging operations may be used by the UWB device to further consolidate, verify, or improve accuracy of the determination of the current room. For example, the ranging data from both responders may be combined with averaging or weighted averaging. In some embodiments, the ranging data from the responder having a stronger signal may be used or weighted more heavily.

[0083] The ranging data from each of the responders of UWB door lock 3 may be used by the UWB device for any of the other puiposes described herein.LOS (line of sight) I NLOS (non-line of sight) indication

[0084] Some UWB door locks are able to determine that a UWB device is within LOS or NLOS. Accordingly, in some embodiments, an indication of LOS or NLOS is provided with the ranging data in addition to, for example, the Distance, Angle of Arrival, and ToF data. The UWB device may be configured to use the indication of LOS or NLOS to assert or determine whether it is located within the same room as the UWB door lock.4902-8493-0671 v.2 15Docket No. 62306.208W001 (P241670-WO-UTL)Using UWB door lock ranging data to determine whether to process DT-Anchor data

[0085] Data related to the current room obtained with a UWB door lock ranging operation (for example when entering a room) can be used by the DT-Tag to determine whether to receive or to process DTM data from DT-Anchors.

[0086] Figure 5A illustrates an example of a deployment 505 of DT-Anchors, UWB door locks, and a UWB device according to aspects of the present disclosure. Figure 5A may be the same as Room 2 in Figure 2, and the same devices use the same labels.

[0087] Figure 5B illustrates a protocol diagram of a method 500 of using UWB door lock communications to select DT-Anchors according to aspects of the present disclosure. Without being limited to a specific deployment, for convenience the method 500 is presented in reference to the devices and deployment in Figure 5A. UWB device 1 is the UWB device in Figure 5A and may be configured as the UWB device 300 in Figure 3.

[0088] At 510, UWB device 1 performs one or more ranging operations with UWB door lock 3, for example, as illustrated in Figure 2. Any method of ranging may be used. As a result of the ranging operations, a door lock initiator or one or more other components of UWB device 1 may access ranging data, for example, having characteristics similar or identical to the ranging data discussed elsewhere herein.

[0089] At 520, UWB device 1 determines that it is located within room 2 based on the ranging data results reported at 510.

[0090] At 530, data identifying room 2 as the current room is provided to the DT-Tag by the Door Lock initiator.

[0091] At 540, the DT-Tag uses the identification of room 2 provided at 530 to determine whether to receive and process data received from DT-Anchors. For example, the deployment configuration data may indicate that the DT-Anchors installed in room 2 are active during Ranging Round 3 and Ranging Round 4. The DT-Tag may, as a consequence, receive and process transmissions from DT-Anchors during Ranging Round 3 and 4, and may selectively not receive and process transmissions from DT-Anchors during other Ranging Rounds. This enables the DT-Tag to, for example, save power, and to filter out Poll and Response DTMs sent by DT-Anchors installed in other rooms.

[0092] At 550, the Door Lock initiator may use the current room information to determine to initiate UWB ranging operations with other nearby UWB door locks during ranging rounds other than 3 and 4. This allows for fewer interferences with the DL-TDoA network.4902-8493-0671 v.2 16Docket No. 62306.208W001 (P241670-WO-UTL)Using UWB door locks to determine whether a UWB device is Inside or Outside

[0093] Some embodiments determine whether a UWB device is inside or outside and, for example, adjust a setting of the UWB device. For example, a transmission power, for example, may be adjusted according to a jurisdictional regulation based on whether the UWB device is inside or outside. Some embodiments activate and deactivate UL-TDoA capabilities based on the location of the UWB device.

[0094] For example, in some jurisdictions, the maximum allowed transmission Power for UWB is not the same inside and outside. Accordingly, transmission power for UWB may be adjusted according to whether the UWB device is inside or outside. For example, in the EU, on some UWB channels, the maximum allowed transmission Power is -41.3 dBm / MHz for outside, and -31.3 dBm / MHz for inside.

[0095] UWB door lock ranging data may be used to determine whether a given UWB device is inside or outside, and one or more UWB device settings, such as transmission power, may be determined or changed according to whether the UWB device is inside or outside.

[0096] Figure 6 illustrates a protocol diagram of a method 600 of using UWB door lock communications to adjust UWB device settings according to aspects of the present disclosure.

[0097] At 610, a UWB device performs one or more ranging operations with UWB door lock 3, for example, as illustrated in Figure 2. Any method of ranging may be used. As a result of the ranging operations, a door lock initiator or one or more other components of the UWB device may access ranging data, for example, having characteristics similar or identical to the ranging data discussed elsewhere herein.

[0098] At 620, the UWB device determines that it is located outside based on the ranging data results determined at 610, for example, at least partly as a result of the ranging data indicating that it is located on the Backside of door lock 3. In addition, as a result of the UWB device determining that it is outside, the UWB device may decrease its UWB transmission Power by 10 dBm, to comply with jurisdictional regulation.

[0099] At 630, the UWB device enters the building.

[0100] At 640, the UWB device performs one or more ranging operations with UWB door lock 3. As a result of the ranging operations, the UWB device may access ranging data, for example, having characteristics similar or identical to the ranging data discussed elsewhere herein.

[0101] At 650, the UWB device determines that it is located inside based on the ranging data results determined at 640, for example, at least partly as a result of the ranging data indicating that it is located on the Frontside of door lock 3.4902-8493-0671 v.2 17Docket No. 62306.208W001 (P241670-WO-UTL)

[0102] At 660, as a result of the UWB device determining that it is inside, the UWB device may change its UWB transmission Power by 10 dBm, as allowed by jurisdictional regulation.

[0103] In some embodiments, for example, to avoid adding unwanted interference or to save power, the increase of transmission Power may be performed conditionally based on other factors, such as whether the UWB device is to increase the UWB ranging distance, or is to increase a data rate, for example, when performing a UWB based data transfer.

[0104] In some embodiments, whether the UWB device is located inside or outside may be determined by the UWB door lock based on ranging results and subsequently transmitted to the UBW device.

[0105] In some embodiments, the UWB device is configured to increase and decrease transmission power of other Radio Access Technologies based on whether the UWB device is inside or outside, for example, according to jurisdictional regulations.Leveraging UWB door locks to detect and start monitoring unauthorized access

[0106] Some embodiments determine whether a UWB device has entered a particular room or area, for example, using procedures discussed elsewhere herein. This information may be used by a system to detect that a UWB device has entered an unauthorized area. Such an event may happen, for example, in an industrial environment, if a user enters an unauthorized area (intentionally or not), for example, by following an authorized user through a door.

[0107] Figure 7 illustrates a protocol diagram of a method 700 of using UWB door lock communications to report location data according to aspects of the present disclosure.

[0108] At 710, a UWB device performs one or more ranging operations with UWB door lock 1, for example, as illustrated in Figure 2. Any method of ranging may be used. As a result of the ranging operations, a door lock initiator or one or more other components of the UWB device may access ranging data, for example, having characteristics similar or identical to the ranging data discussed elsewhere herein.

[0109] At 720, the UWB device determines that it is located in room 1 based on the ranging data results determined at 710, for example, at least partly as a result of the ranging data indicating that it is located on the Backside of door lock 1. In addition, as a result of the UWB device determining that it is in room 1, the UWB device may communicate to its UT-Tag that it is currently located in room 1. The UWB device may further determine that the UWB device is allowed to be in room 1, for example, by referencing configuration data for room 1. In some embodiments, the UWB device is configured to determine that it is allowed to be in room 1 by referencing another data source.4902-8493-0671 v.2 18Docket No. 62306.208W001 (P241670-WO-UTL)

[0110] At 730, the UWB device enters room 2.

[0111] At 740, the UWB device performs one or more ranging operations with UWB door lock 1. As a result of the ranging operations, the UWB device may access ranging data, for example, having characteristics similar or identical to the ranging data discussed elsewhere herein.

[0112] At 750, the UWB device determines that it is located in room 2 based on the ranging data results determined at 740, for example, at least partly as a result of the ranging data indicating that it is located on the Frontside of door lock 1 . In addition, as a result of the UWB device determining that it is in room 2, the UWB device may communicate to its UT-Tag that it is currently located in room 2. The UWB device may further determine that the UWB device is not allowed to be in room 2, for example, by referencing configuration data for room 2. In some embodiments, the UWB device is configured to determine that it is not allowed to be in room 2 by referencing another data source. In some embodiments, in response to determining that the UWB device is not allowed to be in room 2, the UWB device generates an alarm.

[0113] At 760, as a result of the UWB device determining that it is in room 2, the UWB device may report that it is in room 2. For example, the UWB device may report that it is in room 2 using a UL-TDoA session. In some embodiments, the UWB device is configured to receive a communication indicating that it is not allowed to be in room 2 using, for example, a UL-TDoA session or another communication mechanism. In some embodiments, in response to determining that the UWB device is not allowed to be in room 2, the UWB device generates an alarm.

[0114] In some embodiments, the UWB device is configured with a list of authorized and / or unauthorized areas or rooms, for example, as part of the deployment configuration data.

[0115] In some embodiments, a process having features similar or identical to method 700 may be performed to determine whether a UWB device has entered a sensitive or hazardous area or room.

[0116] In some embodiments, the methods discussed herein may be used to support geofencing applications.

[0117] In some embodiments, the UWB infrastructure or system may use the events of a UWB device entering and exiting rooms or areas to gather statistics related to the number and or timing of people or UWB devices in a given room or area.Leveraging UWB door locks to complement DL-TDoA based positioning

[0118] In some embodiments, when the information received from DT-Anchors is not sufficient to determine a position, the ranging results from UWB door locks may be used by a4902-8493-0671 v.2 19Docket No. 62306.208W001 (P241670-WO-UTL)UWB device. For example, if the UWB device has received DTM transmissions from, for example, only two DT- Anchors, the UWB device may not have enough information to determine its location. To gather additional information on the current location, the UWB device may request its door lock initiator to perform a ranging operation with a nearby door lock. In some embodiments, with the additional information from the UWB door lock and the data from the DT -Anchors, the UWB device is then able to determine its location.

[0119] Figure 8 illustrates a protocol diagram of a method 800 of using UWB door lock communications to supplement DT-Anchor data according to aspects of the present disclosure. For convenience, the method 800 is described relative to the deployment 200 illustrated in Figure 2. The UWB device 1 in Figure 8 may be the UWB device in Figure 2 and may be configured as UWB device 300 in Figure 3. For example, the UWB device 1 includes a DT- Tag and a door lock initiator, such as the DT-tag 325 and door lock initiator 323 in Figure 3. The UWB device 1 in Figure 8 is simply referred to as the UWB device in the description of Figure 8 below.

[0120] At 810, a DT-Tag of the UWB device transmits poll DTM transmissions.

[0121] At 820, the DT-Tag of the UWB device receives response DTM transmissions from DT-Anchors 6 and 7, for example, as illustrated in Figure 2, and from no other DT-Anchors. These transmissions can be used to determine that the UWB device is located on a DL-TDoA defined curve, for example, between the DT-Anchors 6 and 7, where the parameters of the curve are determined based on the details of the poll or response DTM transmissions, such as timing information or power.

[0122] At 830, the UWB device determines that the received response DTM transmissions are insufficient for it to determine its location more precisely than on the DL-TDoA defined curve.

[0123] At 840, the DT-Tag of the UWB device signals for the door lock initiator of the UWB device to perform a ranging operation with a UWB door lock.

[0124] At 850, the door lock initiator of the UWB device performs a ranging operation with door lock 3.

[0125] At 860, the ranging data determined by the ranging operation performed at 850 is transmitted to the DT-Tag. In this example, the ranging data from the ranging operation indicate that the UWB device is located 5 meters from the door lock 3, and that the UWB device is on the Frontside of door lock 3. Accordingly, the ranging data indicate that the UWB device is on a ranging defined arc inside the building 5 meters from the door lock 3 responder.4902-8493-0671 v.2 20Docket No. 62306.208W001 (P241670-WO-UTL)

[0126] At 870, the DT-Tag determines the position of the UWB device based on the ranging data of the ranging operation performed at 860 and based on the data of the response DTM transmissions from DT-Anchors 6 and 7 at 820. Accordingly, the UWB device determines that it is at the intersection of the ranging defined arc and the DL-TDoA defined curve between the DT-Anchors 6 and 7.

[0127] In some embodiments, instead of the UWB device determining that the DL-TDoA response DTM transmissions are insufficient, the location of the UWB device may be determined by the DT-Tag based on response DTM transmissions from a number of DT- Anchors. In addition, in response to the location information indicating that the UWB device is moving toward a particular door lock, in some embodiments, once the UWB device is within a limit distance to the particular door lock according to the response DTM transmission data, a ranging operation with the particular door lock is initiated. This procedure may reduce or minimize UWB interference with other users.Leveraging UWB door locks to trigger update of UWB device configuration information

[0128] In some embodiments, a UWB device can use location information determined based on a ranging operation with one or more UWB door locks to trigger a refresh operation of its local storage of deployment configuration data. For example, before crossing a boundary between rooms or areas, a UWB device may have stored deployment configuration data related to areas which is unlikely to be used after crossing the boundary. In addition, before crossing the boundary, the UWB device may not have deployment configuration data related to areas which is likely to be needed after crossing the boundary.

[0129] Figure 9 illustrates an example of a deployment 900 of DT-Anchors, UWB door locks, and a UWB device according to aspects of the present disclosure. In this example, a region (for example of a building) may be divided into a number of areas (that may also be referred to as zones), such as areas 1 through 5. An example of an area may be a room in a building. While location information determined based on ranging operations with, for example, one or more of UWB door locks 1 and 3 indicates that the UWB device is located within area 2, the stored deployment configuration data may be related to, for example, areas1, 2, and 3. Area 1, area 2, and area 3 may be configured similarly or the same as room I, room2, and room 3, respectively, in Figure 2, with the same devices having the same reference labels. The deployment of Figure 9 further includes DT-anchors 11 through 15 and door lock 4 arranged in areas 4 and 5 as shown.4902-8493-0671 v.2 21Docket No. 62306.208W001 (P241670-WO-UTL)

[0130] When location information determined based on ranging operations with, for example, UWB door lock 3 indicates that the UWB device is located within in area 4 or is about to be located in area 4, the stored deployment configuration data may be updated, for example, so as to relate to, for example, areas 2, 4, and 5. Accordingly, the location information may be used to trigger removal of the deployment configuration data related to area 1 because it is far enough, either geographically or logistically, away from the current location, and to trigger fetching of deployment configuration data related to area 5 because it is close enough, either geographically or logistically, to the current location. The deployment configuration data related to area 5 may be fetched, for example, through communication operations with, for example, the system or infrastructure.

[0131] In some embodiments, this dynamic updating of deployment configuration data based on location information can depend on one or more characteristics of the UWB device and / or of the environment. For example, in some embodiments, the UWB device has substantially no memory constraints and the deployment configuration data is not expected to change over time, and the UWB device may have some or all deployment configuration data stored locally and does not dynamically update the deployment configuration data. On the other hand, in some embodiments, memory usage is constrained, and / or the deployment configuration data changes over time, and the deployment configuration data is dynamically updated based on location information.

[0132] Accordingly, in some embodiments, ranging data may complement the positioning information or the information from various DT- Anchors the UWB device to better determine movement and intent to forecast the user movement.

[0133] In some embodiments, ranging operations with UWB door locks can identify elevation, for example, to identify a floor of a structure, for example, in a parking structure or a shopping mall.

[0134] Figure 10 illustrates an example method 100 of UWB device operation, according to some aspects of the present disclosure. An example of the UWB device may be the UWB device 300 described with respect to Figure 3. In step 1010, ranging data is obtained from one or more UWB door lock responders using any of the techniques described herein. For example, the UWB device may determine a distance and / or angle proximity to the one or more door lock responders. In step 1020, an area location of the UWB device is determined based on the ranging data obtained in step 1010. An example of an area location is a room or an area or a zone. For example, the UWB may use the ranging data together with a deployment configuration stored on the device to determine the area location as described herein. In step4902-8493-0671 v.2 22Docket No. 62306.208W001 (P241670-WO-UTL)1030, the UWB communicates with a DL-TDoA system based on the area location as described in embodiments herein, such as described with respect to Figure 5B. For example, based on the area location being a certain room, the UWB device may listen only to identified DT-Anchors that are located in the same area / room and also possibly in nearby areas / rooms and avoid listening to DT-Anchors in areas / rooms that are not nearby.

[0135] Persons skilled in the art will recognize that the apparatus, systems, and methods described above can be modified in various ways. Accordingly, persons of ordinary skill in the art will appreciate that the embodiments encompassed by the present disclosure are not limited to the particular exemplary embodiments described above. In that regard, although illustrative embodiments have been shown and described, a wide range of modification, change, and substitution is contemplated in the foregoing disclosure. It is understood that such variations may be made to the foregoing without departing from the scope of the present disclosure. Accordingly, it is appropriate that the appended claims be construed broadly, and in a manner consistent with the present disclosure.4902-8493-0671 v.2 23

Claims

Docket No. 62306.208W001 (P241670-WO-UTL)CLAIMS1. A method of using an ultra-wideband (UWB) device, the method comprising: obtaining ranging data from one or more UWB door lock responders; determining an area location of the UWB device based on the ranging data; and communicating with a downlink Time Difference of Arrival (DL-TDoA) system based on the area location, wherein the DL-TDoA system comprises a plurality of DL TDoA Anchors (DT- Anchors).

2. The method of claim 1, wherein the obtaining ranging data comprises performing a ranging operation with the one or more UWB door lock responders to obtain the ranging data.

3. The method of claim 1, wherein communicating with the DL-TDoA system comprises determining whether to receive and process data received from the DT-Anchors based on the area location of the UWB device.

4. The method of claim 3, further comprising storing a deployment configuration, wherein the deployment configuration comprises, for each particular DT- Anchor, an identification of one or more ranging rounds during which the particular DT-Anchor performs DL-TDoA Message (DTM) transmissions, and wherein determining whether to receive and process data received from the DT-Anchors is based in part on the deployment configuration.

5. The method of claim 1, further comprising: determining whether the UWB device is inside or outside based on the area location; and changing a setting of the UWB device based on whether the UWB device is inside or outside.

6. The method of claim 1, further comprising determining whether the UWB device is in an unauthorized location based on the area location of the UWB device.

7. The method of claim 1, further comprising determining a location of the UWB device based on the communicating with the DL-TDoA system.4902-8493-0671 v.2 24Docket No. 62306.208W001 (P241670-WO-UTL)8. The method of claim 7, wherein the area location identifies a room, and wherein the communicating with the DL-TDoA system comprises: identifying a set of DT-anchors of the plurality of DT-anchors located in the room; and performing ranging rounds only with the set of DT-anchors to determine the location.

9. The method of claim 8, wherein the UWB device stores a deployment configuration, wherein the deployment configuration comprises: for each of the plurality of DT-anchors, a corresponding room; and for each of the one or more UWB door lock responders, a corresponding frontside room and a corresponding backside room, wherein the area location is further based on the deployment configuration, and wherein the identifying the set of DT-anchors comprises accessing the deployment configuration to determine which of the plurality of DT-anchors is located in the room.

10. The method of claim 1, further comprising: accessing a deployment configuration characterizing the DT-Anchors and the UWB door lock responders; and updating the deployment configuration based on the area location.1 1. A wireless communication device comprising: a transceiver; and a processor coupled to the transceiver and configured to: obtain ranging data from one or more UWB door lock responders: determine an area location of the wireless communication device based on the ranging data; and communicate with a downlink Time Difference of Arrival (DU-TDoA) system based on the area location, wherein the DU-TDoA system comprises a plurality of DU TDoA Anchors (DT- Anchors).

12. The wireless communication device of claim 11, the obtain ranging data comprises: perform a ranging operation with the one or more UWB door lock responders to obtain the ranging data.4902-8493-0671 v.2 25Docket No. 62306.208W001 (P241670-WO-UTL)13. The wireless communication device of claim 11, wherein communicating with the DL-TDoA system comprises determining whether to receive and process data received from the DT-Anchors based on the area location of the wireless communication device.

14. The wireless communication device of claim 13, further comprising a memory configured to store a deployment configuration, wherein the deployment configuration comprises, for each particular DT-Anchor, an identification of one or more ranging rounds during which the particular DT-Anchor performs DTM transmissions, and wherein determining whether to receive and process data received from the DT-Anchors is based in part on the deployment configuration.

15. The wireless communication device of claim 11, wherein the processor is further configured to determine whether the wireless communication device is in an unauthorized location based on the area location of the wireless communication device.

16. The wireless communication device of claim 11, wherein the processor is further configured to determine a location of the wireless communication device based on the communicating with the DL-TDoA system.

17. The wireless communication device of claim 16, wherein the area location identifies a room, and wherein the communicating with the DL-TDoA system comprises: identifying a set of DT-anchors of the plurality of DT-anchors located in the room; and performing ranging rounds only with the set of DT-anchors to determine the location.

18. The wireless communication device of claim 17, further comprising a memory, wherein the memory is configured to store a deployment configuration, wherein the deployment configuration comprises: for each of the plurality of DT-anchors, a corresponding room; and for each of the one or more UWB door lock responders, a corresponding frontside room and a corresponding backside room, wherein the area location is further based on the deployment configuration, and4902-8493-0671 v.2 26Docket No. 62306.208W001 (P241670-WO-UTL) wherein the identifying the set of DT-anchors comprises accessing the deployment configuration to determine which of the plurality of DT-anchors is located in the room.

19. The wireless communication device of claim 11, further comprising a memory, wherein the memory is configured to store a deployment configuration characterizing the DT- Anchors and the UWB door lock responders, and wherein the processor is further configured to: access the deployment configuration; and update the deployment configuration based on the area location.

20. A non-transitory computer-readable medium (CRM) having program code recorded thereon, the program code comprising: code for causing an ultra-wideband (UWB) device to obtain ranging data from one or more UWB door lock responders; code for causing the UWB device to determine an area location of the UWB device based on the ranging data; and code for causing the UWB device to communicate with a downlink Time Difference of Arrival (DL-TDoA) system based on the area location, wherein the DL-TDoA system comprises a plurality of DL TDoA Anchors (DT-Anchors).

21. The non-transitory CRM of claim 20, wherein the obtained ranging data comprises: perform a ranging operation with the one or more UWB door lock responders to obtain the ranging data.

22. The non-transitory CRM of claim 20, wherein communicating with the DL-TDoA system comprises determining whether to receive and process data received from the DT- Anchors based on the area location of the UWB device.

23. The non-transitory CRM of claim 22, further comprising: code for causing the UWB device to access a deployment configuration, wherein the deployment configuration comprises, for each particular DT- Anchor, an identification of one or more ranging rounds during which the particular DT-Anchor performs DTM transmissions, and wherein determining whether to receive and process data received from the DT-Anchors is based in part on the deployment configuration.4902-8493-0671 v.2 27Docket No. 62306.208W001 (P241670-WO-UTL)24. The non-transitory CRM of claim 20, further comprising: code for causing the UWB device to determine whether the UWB device is in an unauthorized location based on the area location of the UWB device.

25. The non-transitory CRM of claim 20, further comprising: code for causing the UWB device to determine a location of the UWB device based on the communicating with the DL-TDoA system.

26. The non-transitory CRM of claim 25, wherein the area location identifies a room, and wherein the communicating with the DL-TDoA system comprises: identifying a set of DT-anchors of the plurality of DT-anchors located in the room; and performing ranging rounds only with the set of DT-anchors to detennine the location.

27. The non-transitory CRM of claim 26, wherein the non-transitory CRM further records a deployment configuration, wherein the deployment configuration comprises: for each of the plurality of DT-anchors, a corresponding room; and for each of the one or more UWB door lock responders, a corresponding frontside room and a corresponding backside room, wherein the area location is further based on the deployment configuration, and wherein the identifying the set of DT-anchors comprises accessing the deployment configuration to determine which of the plurality of DT-anchors is located in the room.

28. The non-transitory CRM of claim 20, wherein the non-transitory CRM further records a deployment configuration characterizing the DT-Anchors and the UWB door lock responders, wherein the program code further comprises: code for causing the UWB device to access the deployment configuration; and code for causing the UWB device to update the deployment configuration based on the area location.

29. The method of claim 7, wherein the area location identifies a first room of a plurality of rooms, and wherein the communicating with the DL-TDoA system comprises:4902-8493-0671 v.2 28Docket No. 62306.208W001 (P241670-WO-UTL) identifying and filtering out a set of DT-anchors of the plurality of DT-anchors located in the plurality of rooms but not in the first room; and to determine the location, performing ranging rounds with the plurality of DT-anchors but excluding the filtered-out set of DT-anchors.

30. The method of claim 2, further comprising storing a deployment configuration, wherein the deployment configuration comprises, for each particular DT-Anchor, an identification of one or more ranging rounds during which the particular DT-Anchor performs DL-TDoA Message (DTM) transmissions, and wherein determining whether to perform a ranging round of the ranging operation is based in part on the deployment configuration.4902-8493-0671 v.2 29

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