KR20210148778A - Electronic device and method for performing ranging through uwb - Google Patents

Abstract

The present invention relates to a first electronic device for performing ranging through an ultra wide band (UWB) with a second electronic device. The first electronic device according to an embodiment may include a communication unit and at least one processor. The at least one processor may control the communication unit to transmit a notification message indicating that the first electronic device is within a predetermined range from the second electronic device to the second electronic device based on an advertisement packet received from the second electronic device. The at least one processor receives a UWB ranging recovery signal from the second electronic device in response to the notification message. In response to the UWB ranging recovery signal, the communication unit may be controlled to recover ranging through the UWB with the second electronic device.

Description

Electronic device and method for performing ranging through Ultra Wide Band (UWB) {ELECTRONIC DEVICE AND METHOD FOR PERFORMING RANGING THROUGH UWB}

The present disclosure relates to an electronic device and method for performing ranging using a UWB communication scheme.

The Internet is evolving from a human-centered connection network where humans create and consume information, to an Internet of Things (IoT) network that exchanges and processes information between distributed components such as objects. Internet of Everything (IoE) technology, which combines big data processing technology through connection with cloud servers, etc. with IoT technology, is also emerging. In order to implement the IoT, technology elements such as sensing technology, wired/wireless communication and network infrastructure, service interface technology, and security technology are required. Recently, technologies such as a sensor network, Machine to Machine (M2M), and MTC (Machine Type Communication) for connection between objects are being studied.

In the IoT environment, an intelligent IT (Internet Technology) service that collects and analyzes data generated from connected objects and creates new values in human life can be provided. IoT, through convergence and compounding between existing IT (information technology) technology and various industries, is a smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliance, advanced medical service, etc. can be applied in the field of

As various services can be provided with the development of wireless communication systems, a method for effectively providing these services is required. For example, in medium access control (MAC), a ranging technique for measuring a distance between electronic devices using Ultra Wide Band (UWB) may be used. UWB is a wireless communication technology that uses a very wide frequency band of several GHz or more in a baseband without using a wireless carrier.

Since power consumption due to UWB ranging is large, power consumption may be prevented by suspending UWB ranging between electronic devices. On the other hand, there is a need to effectively recover the stopped UWB ranging.

According to an embodiment, a first electronic device and method for recovering stopped UWB ranging by transmitting a notification message generated based on an advertisement packet received from the second electronic device to the second electronic device may be provided. .

According to an embodiment of the present disclosure, a first electronic device for performing ranging with a second electronic device through Ultra Wide Band (UWB) includes: a communication unit; and at least one processor, wherein the at least one processor is configured to generate a notification message indicating that the first electronic device is within a predetermined range from the second electronic device based on the advertisement packet received from the second electronic device. transmits to the second electronic device, receives a UWB ranging recovery signal from the second electronic device in response to the notification message, and receives the UWB ranging recovery signal with the second electronic device in response to the UWB ranging recovery signal A first electronic device for controlling the communication unit to recover ranging through

According to an embodiment of the present disclosure, in a method for a first electronic device to perform ranging with a second electronic device through Ultra Wide Band (UWB), based on an advertisement packet received from the second electronic device, the first transmitting a notification message indicating that the electronic device is within a predetermined range from the second electronic device to the second electronic device; receiving a UWB ranging recovery signal from the second electronic device in response to the notification message; and recovering ranging through the UWB in response to the UWB ranging recovery signal.

1 is a diagram for explaining a general D2D (Device-to-Device) communication procedure.
2 is a diagram illustrating a communication process of a plurality of electronic devices.
FIG. 3 is a diagram for describing a method in which a second electronic device detects an approach of a first electronic device.
4A is a diagram for explaining the structure of a first advertisement packet according to an embodiment.
4B is a diagram for explaining the structure of a second advertisement packet according to an embodiment.
5 is a flowchart illustrating a method of operating a first electronic device according to an exemplary embodiment.
6 is a diagram for explaining the structure of a notification message according to an embodiment.
7 is a diagram for explaining the structure of a notification message according to another embodiment.
8 is a diagram for explaining a state of a session for UWB ranging.
9 is a diagram illustrating a process of deferring a request to stop UWB ranging between a device and a vehicle.
10 is a diagram illustrating a process of accepting a request to stop UWB ranging between a device and a vehicle.
11 is a diagram illustrating a process of recovering UWB ranging between a device and a vehicle.
12 is a diagram for describing a method of recovering UWB ranging between a first electronic device and a second electronic device.
13 is a block diagram of a UWB ranging system according to an embodiment.
14 is a diagram for explaining a method of recovering UWB ranging between a device and a vehicle.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art to which the present disclosure pertains can easily implement them. However, the present disclosure may be implemented in several different forms and is not limited to the embodiments described herein. In addition, in order to clearly explain the present disclosure in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

The terms used in the present disclosure have been described as general terms currently used in consideration of the functions mentioned in the present disclosure, but may mean various other terms depending on the intention or precedent of a person skilled in the art, the emergence of new technology, etc. can Therefore, the terms used in the present disclosure should not be construed only as the names of the terms, but should be interpreted based on the meaning of the terms and the contents of the present disclosure.

Also, terms such as first, second, etc. may be used to describe various components, but the components should not be limited by these terms. These terms are used for the purpose of distinguishing one component from another.

In addition, the terms used in the present disclosure are only used to describe specific embodiments, and are not intended to limit the present disclosure. Expressions in the singular include the plural meaning unless the context clearly implies the singular. In addition, throughout the specification, when a part is "connected" with another part, it is not only "directly connected" but also "electrically connected" with another element interposed therebetween. include Also, when a part "includes" a component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

As used throughout this specification, “the” and similar referents may refer to both the singular and the plural. In addition, unless there is a description explicitly designating the order of steps describing a method according to the present disclosure, the described steps may be performed in an appropriate order. The present disclosure is not limited according to the description order of the described steps.

Phrases such as “in one embodiment” appearing in various places in this specification do not necessarily all refer to the same embodiment.

An embodiment of the present disclosure may be represented by functional block configurations and various processing steps. Some or all of these functional blocks may be implemented in various numbers of hardware and/or software configurations that perform specific functions. For example, the functional blocks of the present disclosure may be implemented by one or more microprocessors, or by circuit configurations for a given function. Also, for example, the functional blocks of the present disclosure may be implemented in various programming or scripting languages. The functional blocks may be implemented as an algorithm running on one or more processors. In addition, the present disclosure may employ prior art for electronic configuration, signal processing, and/or data processing, and the like.

In addition, the connecting lines or connecting members between the components shown in the drawings only exemplify functional connections and/or physical or circuit connections. In an actual device, a connection between components may be represented by various functional connections, physical connections, or circuit connections that are replaceable or added.

In general, wireless sensor network technology is largely divided into a wireless local area network (WLAN) technology and a wireless personal area network (WPAN) technology according to a recognition distance. At this time, the wireless LAN is a technology based on IEEE 802.11, and it is a technology that can connect to a backbone network within a radius of about 100 m. In addition, the wireless private network is a technology based on IEEE 802.15, and includes Bluetooth, ZigBee, and ultra wide band (UWB). A wireless network in which such a wireless network technology is implemented may include a plurality of communication electronic devices. In this case, a plurality of communication electronic devices perform communication in an active period using a single channel. That is, the communication electronic devices may collect packets and transmit the collected packets in the active period.

UWB may refer to a short-range, high-speed wireless communication technology using a wide frequency band of several GHz or more, a low spectral density, and a short pulse width (1 to 4 nsec) in a baseband state. UWB may mean a band itself to which UWB communication is applied. Hereinafter, a ranging method between electronic devices will be described based on the UWB communication method, but this is only an example and various wireless communication technologies may be used in practice.

An electronic device according to embodiments of the present disclosure may include a fixed terminal implemented as a computer device or a mobile terminal, and may communicate with other devices and/or servers using a wireless or wired communication method. For example, the electronic device includes a smart phone, a mobile terminal, a laptop computer, a digital broadcasting terminal, personal digital assistants (PDA), a portable multimedia player (PMP), a navigation system, and a slate PC. ), tablet PCs, desktop computers, digital TVs, refrigerators, artificial intelligence speakers, wearable devices, projectors, smart keys, smart cars, printers, car consoles, control devices that control at least some functions of the car, etc. can be, and is not limited to these examples.

Hereinafter, the present disclosure will be described in detail with reference to the accompanying drawings.

1 is a diagram for explaining a general D2D (Device-to-Device) communication procedure.

D2D communication refers to a method in which geographically close electronic devices communicate directly without going through an infrastructure such as a base station. As illustrated in FIG. 1 , electronic devices can communicate in 1:1, 1:many, and many:many. D2D communication may use an unlicensed frequency band such as Wi-Fi Direct and Bluetooth. Alternatively, D2D communication may improve frequency use efficiency of a cellular system by utilizing a licensed frequency band. Although D2D communication is limitedly used as a term referring to communication between objects or object intelligent communication, D2D communication in the present disclosure includes not only a simple electronic device equipped with a communication function, but also a communication function such as a smart phone or a personal computer. Communication between various types of electronic devices equipped with

2 is a diagram illustrating a communication process of a plurality of electronic devices.

The first electronic device 201 and the second electronic device 202 may communicate through a device discovery process 203 , a link creation process 204 , and a data communication process 205 .

In the device discovery process 203 , each of the first electronic device 201 and the second electronic device 202 may discover other electronic devices capable of D2D communication among electronic devices in its vicinity. Through this, each of the first electronic device 201 and the second electronic device 202 may determine whether to generate a link for D2D communication. For example, the first electronic device 201 may transmit a discovery signal so that the second electronic device 202 can discover the first electronic device 201 . In addition, the first electronic device 201 may receive the discovery signal transmitted by the second electronic device 202 and confirm that other electronic devices capable of D2D communication are within the D2D communication range.

In the link creation process 204 , each of the first electronic device 201 and the second electronic device 202 uses an electronic device to transmit data among the electronic devices discovered in the device discovery process 203 and for data transmission. You can create a link. For example, the first electronic device 201 may create a link for data transmission with the second electronic device 202 discovered in the device discovery process 203 .

In the data communication process 205 , each of the first electronic device 201 and the second electronic device 202 may transmit/receive data to and from devices that have created a link in the link creation process 204 . For example, the first electronic device 201 may transmit/receive data to and from the second electronic device 202 through the link generated in the link creation process 204 .

Various embodiments of the present disclosure relate to medium access control (MAC) based on the aforementioned D2D communication. For medium access control, a distance between electronic devices needs to be measured. In this case, a UWB ranging technique may be used to measure the distance between electronic devices.

For example, when using a digital key stored in a smart phone to open and close a vehicle door, the vehicle utilizes a plurality of UWB communication modules (eg, six UWB communication modules) to communicate with the smartphone and the vehicle. After each distance is measured, the location of the smart phone may be estimated based on the measurement result. The vehicle may increase the user's convenience by automatically opening the vehicle door when the vehicle and the smart phone are close to each other by a predetermined distance or less. The vehicle and the smart phone can use multicast ranging or broadcast ranging.

Meanwhile, since power consumption due to UWB ranging is large, UWB ranging may be suspended if necessary and then recovered. For example, when the distance between the vehicle and the smart phone becomes shorter than a predetermined distance, a session for UWB ranging between the vehicle and the smart phone may be started. The vehicle may use UWB ranging to determine the distance between the vehicle and the smart phone. After the UWB ranging session is started, the vehicle and the smart phone may exchange messages for UWB ranging. The distance between the vehicle and the smart phone may be determined by exchanging messages for UWB ranging. If the distance between the vehicle and the smart phone does not change for a certain period of time, the vehicle may determine that the smart phone stays in one place. In this case, the vehicle and the smart phone stop UWB ranging, thereby preventing power consumption due to UWB ranging.

When UWB ranging is stopped, since messages for UWB ranging are not exchanged, the vehicle cannot determine the distance between the vehicle and the smart phone using UWB ranging. Accordingly, the vehicle cannot perform various operations that can be performed using UWB ranging. For example, in a state in which UWB ranging is stopped, even if a vehicle and a smart phone come close to a predetermined distance or less, the vehicle may not automatically open the vehicle door.

Accordingly, in order to recover UWB ranging, the vehicle may determine whether to recover UWB ranging according to a predetermined criterion, and trigger recovery of UWB ranging. When recovery of UWB ranging is triggered, a UWB ranging recovery flow may be performed.

For example, UWB ranging may be restored when the vehicle detects that the user grabs the vehicle's door handle. In this case, a time interval may exist between the time when the recovery of UWB ranging is triggered and the time when the vehicle door is automatically opened. If the UWB ranging is restored only when the vehicle detects that the user holds the door handle of the vehicle, the user can confirm that the door of the vehicle is opened only after waiting a certain period of time from the time the user holds the door handle of the vehicle . Since the door of the vehicle is not opened as soon as the user holds the handle of the vehicle, a problem in which user experience is deteriorated may occur. Accordingly, there is a need for a method for more effectively performing recovery of UWB ranging.

According to an embodiment of the present disclosure, when UWB ranging between the first electronic device and the second electronic device is stopped, the first electronic device performs the second electronic device based on an advertisement packet received from the second electronic device. 2 A notification message may be transmitted to the electronic device. The notification message may indicate information that the first electronic device is approaching the second electronic device. Based on the notification message, the second electronic device may detect the movement of the first electronic device even when UWB ranging is stopped. Since the second electronic device may determine recovery of UWB ranging based on a result of detecting the movement of the first electronic device, the first electronic device and the second electronic device may effectively recover UWB ranging.

FIG. 3 is a diagram for describing a method in which a second electronic device detects an approach of a first electronic device.

According to an embodiment, the first electronic device 302 may include a smart phone, and the second electronic device 304 may include a vehicle. The first electronic device 302 and the second electronic device 304 may correspond to the first electronic device 201 and the second electronic device 202 described above with reference to FIG. 2 , respectively.

The second electronic device 304 according to an embodiment may transmit an advertisement packet. For example, the second electronic device 304 supporting Bluetooth Low Energy (BLE) may periodically broadcast an advertisement packet. Accordingly, even when UWB ranging between the first electronic device 302 and the second electronic device 304 is stopped, the first electronic device 302 receives the advertisement packet broadcast from the second electronic device 304 . can do.

According to an embodiment, the advertisement packet may be classified into a first advertisement packet and a second advertisement packet according to a physical layer. For example, the second electronic device 304 may support a first physical layer and a second physical layer, and the first and second physical layers may be LE Coded PHY and LE 1M PHY, respectively. The second electronic device 304 may transmit the first advertisement packet and the second advertisement packet to the first electronic device 302 using the first physical layer and the second physical layer, respectively. For example, the first advertisement packet and the second advertisement packet may include an LE Coded PHY type advertisement packet and an LE 1M PHY type advertisement packet, respectively. However, specific types of the first physical layer and the second physical layer are not limited thereto, and may include physical layer types of Bluetooth communication and other wireless communication.

When the first electronic device 320 and the second electronic device 304 communicate through the first physical layer, the first electronic device 302 and the second electronic device 304 have a first effective communication distance . When the first electronic device 320 and the second electronic device 304 communicate through the second physical layer, the first electronic device 302 and the second electronic device 304 have a second effective communication distance . The first effective communication distance may be longer than the second effective communication distance, for example, the first effective communication distance and the second effective communication distance may be about 60 meters and about 30 meters, respectively. However, the first effective communication distance and the second effective communication distance are not limited to specific values, and the first effective communication distance and A specific value of the second effective communication distance may vary.

When the distance between the first electronic device 302 and the second electronic device 304 is longer than the first effective communication distance, the first electronic device 302 sends the first advertisement packet and the second electronic device 304 from the second electronic device 304 . 2 Cannot receive all advertisement packets.

As the first electronic device 302 approaches the second electronic device 304, the distance between the first electronic device 302 and the second electronic device 304 becomes shorter than the first effective communication distance, but the second effective communication When the distance is longer than the distance, the first electronic device 302 may receive only the first advertisement packet among the first advertisement packet and the second advertisement packet.

When the first electronic device 302 approaches the second electronic device 304 further, and the distance between the first electronic device 302 and the second electronic device 304 becomes shorter than the second effective communication distance, The first electronic device 302 may receive both the first advertisement packet and the second advertisement packet.

For example, as shown in FIG. 3 , the second electronic device 304 may transmit advertisement packets using two physical layers LE 1M PHY and LE Coded PHY. If the distance between the first electronic device 302 and the second electronic device 304 is longer than the effective communication distance (eg, about 60 m) of the LE Coded PHY, the first electronic device 302 sends the second An advertisement packet cannot be received from the electronic device 304 . As the first electronic device 302 approaches the second electronic device 304, the distance between the first electronic device 302 and the second electronic device 304 is shorter than the effective communication distance of the LE Coded PHY, but the LE 1M If it is longer than the PHY effective communication distance (eg, about 30 m), the first electronic device 302 may receive only the LE Coded PHY type advertisement packet.

When the first electronic device 302 approaches the second electronic device 304 further, and the distance between the first electronic device 302 and the second electronic device 304 becomes shorter than the LE 1M PHY effective communication distance, The first electronic device 302 may receive both LE Coded PHY and LE 1M PHY type advertisement packets.

As such, the type of advertisement packet that the first electronic device 302 can receive from the second electronic device 304 may be determined according to the distance between the first electronic device 302 and the second electronic device 304 .

Also, the number of advertisement packets that the first electronic device 302 can receive from the second electronic device 304 per unit time may be determined according to the distance between the first electronic device 302 and the second electronic device 304 . have. For example, since the second electronic device 304 periodically transmits an advertisement packet to the first electronic device 302 , the closer the distance between the first electronic device 302 and the second electronic device 304 is, the closer the second electronic device 304 is. The number of advertisement packets that one electronic device 302 receives from the second electronic device 304 per unit time may be greater.

The first electronic device 302 may generate a notification message based on the type and number of received advertisement packets. For example, the notification message may include information on the type of the received advertisement packet. The first electronic device 302 may transmit a notification message to the second electronic device 304 . The first electronic device 302 may change the transmission period of the notification message based on the number of received advertisement packets. The second electronic device 304 may detect that the first electronic device 302 is approaching the second electronic device 304 based on the notification message received from the first electronic device 302 . Also, the second electronic device 304 may determine the degree to which the first electronic device 302 approaches the second electronic device 304 based on the transmission period of the notification message.

According to an embodiment of the present disclosure, the first electronic device 302 performs the first electronic device 302 based on at least one of the first advertisement packet and the second advertisement packet received from the second electronic device 304 . A notification message indicating that is within a predetermined range from the second electronic device 304 may be transmitted to the second electronic device 304 . For example, the first electronic device 302 may transmit a notification message generated based on the first advertisement packet and the second advertisement packet having different communication distances to the electronic device 304 .

The second electronic device 304 may periodically transmit a plurality of first advertisement packets and a plurality of second advertisement packets to the first electronic device 302 . Periods in which the first advertisement packets and the second advertisement packets are transmitted from the second electronic device 304 may be different from each other. The first electronic device 302 may receive a plurality of first advertisement packets and a plurality of second advertisement packets from the second electronic device 304 . The first electronic device 302 may transmit a notification message to the second electronic device 304 based on at least one of the number of first advertisement packets and the number of second advertisement packets.

The first electronic device 302 notifies the second electronic device 304 that the first electronic device 302 is within a first range from the second electronic device 304 based on the reception information of the first advertisement packets. A notification message including information may be transmitted. For example, the first electronic device 302 may periodically measure the number of first advertisement packets and the number of second advertisement packets received from the second electronic device 304 . When the number of first advertisement packets received from the second electronic device 304 for a predetermined time is equal to or greater than the first threshold, the first electronic device 302 sends the first electronic device 302 to the second electronic device 304 A notification message including information notifying that is within the first range may be transmitted from the second electronic device 304 . Optionally, the predetermined time may be a period in which the first electronic device 302 measures the number of first advertisement packets and the number of second advertisement packets.

The first electronic device 302 notifies the second electronic device 304 that the first electronic device 302 is within a second range from the second electronic device 304 based on the reception information of the second advertisement packets. A notification message including information may be transmitted. For example, when the number of second advertisement packets received from the second electronic device 304 for a predetermined time is equal to or greater than the second threshold, the first electronic device 302 sends the first electronic device to the second electronic device 304 . The device 302 may transmit a notification message including information indicating that the device 302 is within the second range from the second electronic device 304 .

Optionally, the first range may be wider than the second range. The number of first advertisement packets of the LE Coded PHY type that the first electronic device 302 receives from the second electronic device 304 per unit time is greater than or equal to the first threshold, and the number of second advertisement packets of the LE 1M PHY type is If it is less than the second threshold, the first electronic device 302 sends a notification message including information indicating that the first electronic device 302 is within a first range from the second electronic device 304 to the second electronic device ( 304) can be transmitted.

When the number of second advertisement packets of the LE 1M PHY type that the first electronic device 302 receives from the second electronic device 304 per unit time is equal to or greater than the second threshold, the first electronic device 302 transmits the first electronic device A notification message including information indicating that the device 302 is within a second range from the second electronic device 304 may be transmitted to the second electronic device 304 .

According to an embodiment, the first electronic device 302 determines that the first electronic device 302 transmits the second advertisement packet based on at least one of the first advertisement packet and the second advertisement packet received from the second electronic device 304 . A notification message including information indicating that the electronic device 304 is within the first range and outside the second range may be transmitted in the first period. Also, based on at least one of the first advertisement packet and the second advertisement packet received from the second electronic device 304 , the first electronic device 302 determines that the first electronic device 302 transmits the second electronic device 304 to the second electronic device 304 . ), a notification message including information indicating that it is within the second range may be transmitted in the second period.

For example, when the number of first advertisement packets received for a predetermined time is equal to or greater than the first threshold and the number of received second advertisement packets is less than the second threshold, the first electronic device 302 determines the first electronic device The second electronic device 302 may transmit notification messages including information indicating that it is within the first range and out of the second range from the second electronic device 304 in the first period. In addition, the first electronic device 302 determines that the first electronic device 302 is within a second range from the second electronic device 304 when the number of second advertisement packets received for a predetermined time is equal to or greater than the second threshold. Notification messages including information indicating

Optionally, the first period may be longer than the second period. The first electronic device 302 may transmit notification messages to the second electronic device 304 more frequently as the first electronic device 302 is closer to the second electronic device 304 . For example, when the first electronic device 302 determines that the first electronic device 302 is within a second range from the second electronic device 304 , the first electronic device 302 is the second electronic device Notification messages may be transmitted to the second electronic device 304 more frequently than when it is determined that the user is within the first range from 304 and out of the second range. According to an embodiment, the first electronic device 302 changes the period of transmitting notification messages to the second electronic device 304 according to the distance between the first electronic device 302 and the second electronic device 304 . By doing so, it is possible to provide the second electronic device 304 with a more specific criterion as to whether the second electronic device 304 recovers UWB ranging.

4A is a diagram for explaining the structure of a first advertisement packet according to an embodiment.

According to an embodiment, the first advertisement packet may include an LE Coded PHY type packet. The LE Coded PHY type packet may include a preamble, an access address, a Packet Data Unit (PDU) and a Cyclical Redundancy Check (CRC), a coding indicator (CI), TERM1 and TERM2. The preamble included in the LE Coded PHY type packet may include identification information. For example, when receiving an advertisement packet from the second electronic device 304 , the first electronic device 302 may identify that the received advertisement packet is an LE Coded PHY type packet based on the preamble of the advertisement packet.

4B is a diagram for explaining the structure of a second advertisement packet according to an embodiment.

According to an embodiment, the second advertisement packet may include an LE 1M PHY type packet. The LE 1M PHY type packet may include a preamble, an access address, a Packet Data Unit (PDU), and a Cyclical Redundancy Check (CRC). The preamble included in the LE 1M PHY type packet may include identification information. For example, when receiving the advertisement packet from the second electronic device 304 , the first electronic device 302 may identify that the received advertisement packet is an LE 1M PHY type packet based on the preamble of the advertisement packet.

5 is a flowchart illustrating a method of operating a first electronic device according to an exemplary embodiment.

In step S502 , the first electronic device 302 notifies that the first electronic device 302 is within a predetermined range from the second electronic device 304 based on the advertisement packet received from the second electronic device 304 . The message may be transmitted to the second electronic device 304 . The first electronic device 302 transmits the first electronic device 302 from the second electronic device 304 based on at least one of the first advertisement packet and the second advertisement packet received from the second electronic device 304 . A message indicating that it is within a predetermined range may be transmitted to the second electronic device 304 .

For example, the first electronic device 302 may receive a plurality of first advertisement packets and a plurality of second advertisement packets from the second electronic device 304 . The first electronic device 302 receives information that the first electronic device 302 is within a first range from the second electronic device 304 when the number of first advertisement packets received for a predetermined time is equal to or greater than the first threshold. The included notification message may be transmitted to the second electronic device 304 . In addition, the first electronic device 302 determines that the first electronic device 302 is within a second range from the second electronic device 304 when the number of second advertisement packets received for a predetermined time is equal to or greater than the second threshold. A notification message including information may be transmitted to the second electronic device 304 .

According to an embodiment, the first electronic device 302 determines that the first electronic device 302 is within a first range from the second electronic device 304 based on at least one of the first advertisement packet and the second advertisement packet. If it is determined to be included in the second range and is out of the second range, notification messages may be transmitted to the second electronic device 304 in a first cycle. In addition, if the first electronic device 302 determines that the first electronic device 302 is within a second range from the second electronic device 304 based on at least one of the first advertisement packet and the second advertisement packet, , the notification messages may be transmitted to the second electronic device 304 in the second cycle. According to an embodiment, since the second period is shorter than the first period, the first electronic device 302 sends notification messages to the second electronic device 304 more frequently as it approaches the second electronic device 304 . can be transmitted The notification message will be described in detail later with reference to FIGS. 6 and 7 .

In operation S504 , the first electronic device 302 may receive a UWB ranging recovery signal from the second electronic device 304 in response to the notification message. The second electronic device 304 may determine whether to recover UWB ranging in response to the notification message received from the first electronic device 302 . When the second electronic device 304 determines to recover UWB ranging, it may transmit a UWB range recovery signal to the first electronic device 302 .

According to an embodiment, the notification message includes information about whether the first electronic device 302 is within a first range from the second electronic device 304, and the first electronic device 302 sends the second electronic device 304 to the second electronic device 304. It may include at least one of information about whether or not it is within the second range from , and information about transmission power of a notification message. The second electronic device 304 may determine whether to recover UWB ranging based on information included in the notification message.

For example, the second electronic device 304 may determine the signal strength of the notification message according to information on the transmission power of the notification message. Optionally, the second electronic device 304 may determine the signal strength by measuring a Received Signal Strength Indicator (RSSI) or a Signal To Interference plus Noise Ratio (SINR). When the second electronic device 304 determines to recover UWB ranging, the second electronic device 304 may transmit a UWB ranging recovery signal to the first electronic device 302 .

According to another embodiment, the notification message may further include at least one of information on the reception power of the most recently received first advertisement packet and information on the reception power of the most recently received second advertisement packet. . Optionally, the first electronic device 302 may measure the RSSI to measure the reception power of the first advertisement packet or the reception power of the second advertisement packet. The second electronic device 304 may determine whether to recover UWB ranging based on at least one of information on the reception power of the first advertisement packet and information on the reception power of the second advertisement packet.

For example, the second electronic device 304 may determine whether to recover UWB ranging based on a difference between the reception power of the first advertisement packet and the transmission power of the first advertisement packet. Also, the second electronic device 304 may determine whether to recover UWB ranging based on a difference between the reception power of the second advertisement packet and the transmission power of the second advertisement packet.

According to another embodiment, the first electronic device 302 may detect information on the movement of the first electronic device and include the information on the movement of the first electronic device in the notification message. The second electronic device 304 may determine whether to recover UWB ranging based on the information on the movement of the first electronic device.

According to another embodiment, the first electronic device 302 may detect Global Positioning System (GPS) information related to the location of the first electronic device 302 and include the GPS measurement value in the notification message. The second electronic device 304 may determine whether to recover UWB ranging based on GPS information.

In operation S506 , the first electronic device 302 may recover UWB ranging in response to the received UWB ranging recovery signal.

6 is a diagram for explaining the structure of a notification message according to an embodiment.

The notification message according to an embodiment includes information indicating whether the first electronic device 302 is included in the first range from the second electronic device 304 (LE_Coded_PHY_Range), and the first electronic device 302 includes the second electronic device It may include information (LE_1M_PHY_Range) indicating whether it is included in the second range from 304 and information about the transmission power of the notification message (TX_power).

As an example, the information LE_Coded_PHY_Range indicating whether the first electronic device 302 is included in the first range from the second electronic device 304 may be represented by one bit of information. For example, when the first electronic device 302 is included within a first range from the second electronic device 304 . A field value of the information LE_Coded_PHY_Range indicating whether the first electronic device 302 is included in the first range from the second electronic device 304 may have a value of '1'. When the first electronic device 302 is not included in the first range from the second electronic device 304 , it is determined whether the first electronic device 302 is included in the first range from the second electronic device 304 . A field value of the indicated information (LE_Coded_PHY_Range) may have a value of '0'.

As an example, the information LE_1M_PHY_Range indicating whether the first electronic device 302 is included in the second range from the second electronic device 304 may be represented by one bit of information. For example, when the first electronic device 302 is included within the second range from the second electronic device 304 , the first electronic device 302 is included within the second range from the second electronic device 304 . A field value of the information (LE_1M_PHY_Range) indicating whether or not it is '1' may have a value of '1'. Information indicating whether the first electronic device 302 is included within the second range from the second electronic device 304 when the first electronic device 302 is not included within the second range from the second electronic device 304 A field value of (LE_1M_PHY_Range) may have a value of '0'.

As an example, the information (TX_power) on the transmission power of the notification message may be represented by 6-bit information. The first electronic device 302 may measure the transmission power of the notification message in units of millidecibels (dBm), and the transmission power may be the RSSI or SINR of the notification message. The first electronic device 302 may generate the information TX_power on the transmit power so that the information TX_power on the transmit power includes a value obtained by adding 20 dBm to the measured transmit power.

7 is a diagram for explaining the structure of a notification message according to another embodiment.

The notification message according to another embodiment includes information on reception power of an advertisement packet (RSSI_device), information on motion of the first electronic device (Motion_detection), and first GPS information ( GPS_Latitude) and at least one of second GPS information (GPS_Longitude) may be further included.

As an example, the information on the received power (RSSI_device) may be represented by 8-bit information. The information on the reception power (RSSI_device) is the information of the advertisement packet most recently received from the second electronic device 304 before the time when the first electronic device 302 transmits the notification message to the second electronic device 304 . It can represent the reception power. Optionally, the advertisement packet may be any one of the first advertisement packet and the second advertisement packet. The first electronic device 302 may measure the reception power of the advertisement packet by measuring the RSSI of the most recently received advertisement packet in units of dBm. The first electronic device 302 may generate the information on the reception power (RSSI_device) so that the information on the reception power (RSSI_device) includes a value obtained by adding 127 dBm to the reception power of the measured advertisement packet.

As an example, the information (Motion_detection) on the motion of the first electronic device may be expressed as 2-bit information. The information on the movement of the first electronic device (Motion_detection) may indicate information on whether the first electronic device is moving. For example, the first electronic device 302 may detect the movement of the first electronic device and generate information on whether the first electronic device is moving.

When the first electronic device 302 fails to detect the movement of the first electronic device, the information (Motion_detection) on the movement of the first electronic device may be set to a value of '0'. When the first electronic device 302 detects that the first electronic device is not moving, the first electronic device may set motion_detection information (Motion_detection) to a value of '1'. When the first electronic device 302 detects that the first electronic device is moving, the first electronic device may set motion_detection information (Motion_detection) to a value of '2'.

As an example, the first electronic device 302 may transmit a notification message further including GPS information related to the location of the first electronic device 302 to the second electronic device 304 . The GPS information may include first GPS information (GPS_Latitude) and second GPS information (GPS_Longitude). Each of the first GPS information (GPS_Latitude) and the second GPS information (GPS_Longitude) may be represented by 64-bit information. The first GPS information (GPS_Latitude) and the second GPS information (GPS_Longitude) may indicate a latitude value and a longitude value of the first electronic device 302 obtained by the first electronic device 302 using GPS, respectively.

8 is a diagram for explaining a state of a session for UWB ranging.

In order to perform UWB ranging between the first electronic device 302 and the second electronic device 304 , a session for UWB ranging may be started first. For example, when the first electronic device 302 approaches the second electronic device 304 within a predetermined distance, the first electronic device 302 and the second electronic device 304 communicate with each other through message exchange. can recognize Optionally, the first electronic device 302 and the second electronic device 304 confirm that the first electronic device 302 and the second electronic device 304 match each other through an authentication procedure, and perform UWB ranging You can start a session.

When a session for UWB ranging is started, the initial state of the session for UWB ranging may be an activated state. When the session for UWB ranging is activated, the first electronic device 302 and the second electronic device 304 exchange messages for UWB ranging with each other, and the first electronic device 302 and the second electronic device 302 UWB ranging for measuring the distance between the devices 304 may be performed.

Since power consumption due to activation of a session for UWB ranging is large, when UWB ranging is not required, the session for UWB ranging may be stopped. For example, when the distance between the first electronic device 302 and the second electronic device 304 is maintained constant for a predetermined time, the session for UWB ranging may be stopped. The first electronic device 302 may request the second electronic device 304 to stop UWB ranging. When the second electronic device 304 accepts the request, the second electronic device 304 may transmit an interrupt acceptance response to the first electronic device 302 . If the second electronic device 304 postpones the request without accepting the request, the session for UWB ranging may maintain an active state.

When the first electronic device 302 receives the stop accept response, the session for UWB ranging may be stopped. When the session for UWB ranging is stopped, the first electronic device 302 and the second electronic device 304 may not exchange messages for UWB ranging with each other. Accordingly, while the session for UWB ranging is stopped, the second electronic device 304 cannot detect the degree to which the first electronic device 302 approaches the second electronic device 304 through UWB ranging.

When the second electronic device 304 determines that the session for UWB ranging needs to be restored, the second electronic device 304 may transmit a recovery request to the first electronic device 302 . For example, when the first electronic device 302 starts to move and approaches the second electronic device 304 , the session for UWB ranging may be restored. When the session for UWB ranging is recovered, the UWB ranging session may maintain an active state.

According to an embodiment, after the session for UWB ranging is stopped, the first electronic device 302 performs the UWB ranging based on at least one of the first advertisement packet and the second advertisement packet received from the second electronic device 304 . Thus, a notification message may be transmitted to the second electronic device 304 . The second electronic device 304 may determine whether to recover a session for UWB ranging based on the notification message. The second electronic device 304 may transmit a UWB ranging recovery signal to the first electronic device 302 in response to the notification message. The first electronic device 302 may recover a session for UWB ranging in response to the UWB ranging recovery signal.

According to an embodiment, after the session for UWB ranging is stopped, the first electronic device 302 does not receive any BLE packets including advertisement packets from the second electronic device 304 for a predetermined time. In this case, the first electronic device 302 and the second electronic device 304 may end the session for UWB ranging.

Hereinafter, an example of a specific process in which the first electronic device 302 and the second electronic device 304 perform interruption or recovery of the UWB ranging session will be described with reference to FIGS. 9 to 12 . do.

9 is a diagram illustrating a process of deferring a request to stop UWB ranging between a device and a vehicle.

The device 902 and the vehicle 904 illustrated in FIG. 9 may correspond to the first electronic device 302 and the second electronic device 304 described above with reference to FIG. 3 , respectively.

In step S902 , the device 902 may transmit a UWB ranging suspension request (Ranging_Suspend_RQ) to the vehicle 904 . When the UWB ranging stop request (Ranging_Suspend_RQ) is transmitted, the session for UWB ranging between the device 902 and the vehicle 904 may be in an active state.

In step S904 , the vehicle 904 may determine whether to stop UWB ranging in response to the UWB ranging request (Ranging_Suspend_RQ). The vehicle 904 may decide to postpone the suspension of UWB ranging in response to the UWB ranging suspension request (Ranging_Suspend_RQ). For example, the vehicle 904 may determine whether to stop UWB ranging based on information on available power. Optionally, the vehicle 904 may decide not to stop UWB ranging, but to postpone the cessation of UWB ranging when the available power is sufficient.

In step S906 , the vehicle 904 may transmit a UWB ranging suspension response (Ranging_Suspend_RS(0x01)) to the device 902 after determining to postpone the suspension of UWB ranging. For example, the UWB ranging stop response may indicate information on whether to stop UWB ranging using 1-bit information. When the field value of the UWB ranging stop response has a value of '1', the UWB ranging stop response may indicate information indicating that the UWB ranging stop response is postponed.

10 is a diagram illustrating a process of accepting a request to stop UWB ranging between a device and a vehicle.

The device 1002 and the vehicle 1004 illustrated in FIG. 10 may correspond to the first electronic device 302 and the second electronic device 304 described above with reference to FIG. 3 , respectively.

In step S1002 , the device 902 may transmit a UWB ranging stop request (Ranging_Suspend_RQ) to the vehicle 904 . When the UWB ranging stop request (Ranging_Suspend_RQ) is transmitted, the session for UWB ranging between the device 1002 and the vehicle 1004 may be in an active state.

In step S1004 , the vehicle 1004 may determine whether to stop UWB ranging in response to the UWB ranging request (Ranging_Suspend_RQ). The vehicle 1004 may decide to suspend UWB ranging in response to the UWB ranging request (Ranging_Suspend_RQ). For example, the vehicle 1004 may determine whether to stop UWB ranging based on information on available power. Optionally, vehicle 1004 may decide to stop UWB ranging if there is insufficient power available.

In step S1006 , the vehicle 1004 may transmit a UWB ranging suspension response (Ranging_Suspend_RS(0x00)) to the device 1002 after determining to suspend UWB ranging. For example, the UWB ranging stop response may indicate information on whether to stop UWB ranging using 1-bit information. When the field value of the UWB ranging stop response has a value of '0', the UWB ranging stop response may indicate information indicating that UWB ranging is stopped.

11 is a diagram illustrating a process of recovering UWB ranging between a device and a vehicle.

The vehicle 1102 and the device 1104 illustrated in FIG. 11 may correspond to the second electronic device 304 and the first electronic device 302 described above with reference to FIG. 3 , respectively.

In step S1102 , the vehicle 1102 may decide to restore the interruption of UWB ranging. The vehicle 1102 may decide to restore the cessation of UWB ranging based on a predetermined criterion or algorithm.

In step S1104 , the vehicle 1102 may transmit a UWB ranging recovery request (Ranging_Recovery_RQ) to the device 1104 .

In step S1106 , the device 1104 responds to the UWB ranging recovery request (Ranging_Recovery_RQ), and configures the environment for UWB ranging exchanged between the device 1104 and the vehicle 1102 while setting up a session for UWB ranging. (configuration) can be identified.

In step S1108 , the device 1104 may set a 0th Scrambled Timestamp Sequence (STS) index (STS_Index0) and a 0th UWB time (UWB_Time0). When UWB ranging is performed, the device 1104 and the vehicle 1102 may use the STS to record when the packet was received. The STS may be a code made with a random number value, and the STS index may be a unique value indicating the index of slots required for the generation of the STS. The 0th STS index may be a reference STS index among a plurality of STS indices. In addition, the ranging block means a time period for UWB ranging, and the device 1104 may set the time of the initial ranging block as the 0th UWB time.

In step S1110 , the device 1104 may transmit a UWB ranging recovery response (Ranging_Recovery_RS) to the vehicle 1102 . The UWB ranging recovery response (Ranging_Recovery_RS) may include information on the 0th STS index (STS_Index0) and the 0th UWB time (UWB_Time0) set in step S1108.

In operation S1112 , the vehicle 1102 may set the 0th STS index (STS_Index0) and the 0th UWB time (UWB_Time0) based on the UWB ranging recovery response (Ranging_Recovery_RS). For example, the vehicle 1102 may set the 0th STS index (STS_Index0) and the 0th UWB time (UWB_Time0) to the values set in step S1108. Additionally, vehicle 1102 may identify a configuration for UWB ranging exchanged between device 1104 and vehicle 1102 while setting up a session for UWB ranging.

12 is a diagram for describing a method of recovering UWB ranging between a first electronic device and a second electronic device.

The first electronic device 1202 and the second electronic device 1204 may correspond to the first electronic device 302 and the second electronic device 304 described with reference to FIG. 3 , respectively.

In operation S1202 , the first electronic device 1202 and the second electronic device 1204 may stop the UWB ranging session. As described above with reference to FIGS. 9 and 10 , the first electronic device 1202 and the second electronic device 1204 may stop the UWB ranging session in response to the interruption request of the first electronic device 1202 . , the UWB ranging session may be stopped in response to a stop request from the second electronic device 1202 .

In operation S1204 , the second electronic device 1204 may transmit an advertisement packet PACKET_ADVT to the first electronic device 1202 . The advertisement packet PACKET_ADVT may include a first advertisement packet and a second advertisement packet. The second electronic device 1204 may periodically transmit the first advertisement packet and the second advertisement packet to the first electronic device 1202 . The second electronic device 1204 may separately store the transmission power of the first advertisement packet and the transmission power of the second advertisement packet. The second electronic device 1204 may transmit the first advertisement packet and the second advertisement packet to the first electronic device 1202 by using BLE. The first advertisement packet and the second advertisement packet may be LE Coded PHY type packets and LE 1M PHY type packets, respectively.

In operation S1206 , the first electronic device 1202 may transmit a notification message MESSAGE_NOTI to the second electronic device 1204 . When the number of first advertisement packets received for a predetermined time is equal to or greater than the first threshold, the first electronic device 1202 may transmit a notification message MESSAGE_NOTI to the second electronic device 1204 in a first cycle. The second electronic device 1202 transmits a notification message MESSAGE_NOTI to the second electronic device 1204 at a second cycle shorter than the first cycle when the number of second advertisement packets received for a predetermined time is equal to or greater than the second threshold. can

According to an embodiment, the notification message MESSAGE_NOTI includes information indicating whether the first electronic device 1202 is included in the first range from the second electronic device 1204 , and the first electronic device 1202 sends the second electronic device 1202 to the second electronic device 1202 . It may include at least one of information indicating whether the device 1204 is included in the second range and information on transmission power of the notification message.

According to another embodiment, the notification message MESSAGE_NOTI may further include at least one of information on the reception power of the most recently received advertisement packet, information on the movement of the first electronic device 1202, and GPS information. have.

In operation S1208, the second electronic device 1204 may determine recovery of UWB ranging based on information included in the notification message MESSAGE_NOTI. According to an embodiment, the second electronic device 1204 provides information indicating whether the first electronic device 1202 is included in the first range from the second electronic device 1204 and the first electronic device 1202 The recovery of UWB ranging may be determined based on at least one of information indicating whether the second electronic device 1204 is within the second range.

According to an embodiment, the second electronic device 1204 may determine recovery of UWB ranging by further considering information on transmission power of the notification message MESSAGE_NOTI. According to another embodiment, the second electronic device 1204 provides information on the transmission power of the advertisement packet (PACKET_ADVT) stored in step S1204 and the reception power of the advertisement packet (PACKET_ADVT) included in the notification message (MESSAGE_NOTI). By further considering the information, it is possible to determine recovery of UWB ranging.

For example, in the second electronic device 1204 , when the first electronic device 1202 is included within a second range from the second electronic device 1204 , the transmission power of the advertisement packet (PACKET_ADVT) and the advertisement packet (PACKET_ADVT) It may be determined that the first electronic device 1202 is closer to the second electronic device 1204 as the difference in the reception power of . When it is determined that the first electronic device 1202 is sufficiently close to the second electronic device 1204 , the second electronic device 1204 may determine recovery of UWB ranging.

In operation S1210 , the second electronic device 1204 may transmit a recovery request RQ_RECOVER to the first electronic device 1202 .

In operation S1212 , the first electronic device 1202 and the second electronic device 1204 may recover UWB ranging as described above with reference to FIG. 11 .

13 is a block diagram of a UWB ranging system according to an embodiment.

The UWB ranging system 1300 may include an electronic device 1302 and a vehicle 1310 . The electronic device 1302 and the vehicle 1310 may correspond to the first electronic device 302 and the second electronic device 304 described with reference to FIG. 3 , respectively. In FIG. 13 , the electronic device 1302 is illustrated to communicate with the vehicle 1310 , but the present disclosure is not limited thereto, and the electronic device 1302 may communicate with various other electronic devices.

The electronic device 1302 may include a processor 1304 , a communication unit 1306 , and a memory 1308 . However, the electronic device 1302 may be implemented with more or fewer components than those shown in FIG. 13 .

Although the electronic device 1300 is illustrated as including one processor in FIG. 13 , the embodiment is not limited thereto, and the electronic device 1300 may include a plurality of processors. At least some of the operations and functions of the processor 1304 described below may be performed by a plurality of processors. The electronic device 1300 illustrated in FIG. 13 may perform an operation method according to various embodiments of the present disclosure, and the descriptions of FIGS. 1 to 12 may be applied.

The communication unit 1306 according to an embodiment of the present disclosure may perform wired/wireless communication with other devices or networks. To this end, the communication unit 1306 may include a communication module supporting at least one of various wired and wireless communication methods. For example, the communication module may be in the form of a chipset, or may be a sticker/barcode (eg, a sticker including an NFC tag) including information necessary for communication.

Wireless communication may include, for example, at least one of cellular communication, Wireless Fidelity (Wi-Fi), Wi-Fi Direct, Bluetooth, Ultra Wide Band (UWB), or Near Field Communication (NFC). . Wired communication may include, for example, at least one of USB and High Definition Multimedia Interface (HDMI).

In an embodiment, the communication unit 1306 may include a communication module for short range communication. For example, the communication unit 1306 is a communication module for performing various short-distance communication such as infrared communication, MST (Magnetic Secure Transmission, magnetic secure communication) in addition to UWB, Wi-Fi, Wi-Fi Direct, Bluetooth, and NFC described above. may include

The communication unit 1306 according to an embodiment of the present disclosure may communicate with the vehicle 1310 using the first communication method or the second communication method. For example, the second communication method may be a UWB communication method, and the first communication method may be a communication method different from the second communication method. For example, the first communication method may be a Bluetooth communication method, but is not limited thereto.

The processor 1304 according to an embodiment of the present disclosure controls the overall operation of the electronic device 1302 by executing a program stored in the memory 1308, and may include at least one processor such as a CPU or GPU. . The processor 1304 may control other components included in the electronic device 1302 to perform UWB ranging.

The vehicle 1310 may transmit an advertisement packet (PACKET_ADVT). The advertisement packet PACKET_ADVT may include a first advertisement packet and a second advertisement packet. The vehicle 1310 may periodically broadcast the first advertisement packet and the second advertisement packet, and the communication unit 1306 may receive at least one of the first advertisement packet and the second advertisement packet. The vehicle 1310 may separately store the transmission power of the first advertisement packet and the transmission power of the second advertisement packet. The vehicle 1310 may transmit the first advertisement packet and the second advertisement packet by using BLE. The first advertisement packet and the second advertisement packet may be LE Coded PHY type packets and LE 1M PHY type packets, respectively.

The processor 1304 may generate a notification message MESSAGE_NOTI based on the received first advertisement packet and the second advertisement packet. According to an embodiment, the notification message MESSAGE_NOTI includes information indicating whether the electronic device 1302 is included in a first range from the vehicle 1310 , and the electronic device 1302 is included in a second range from the vehicle 1310 . It may include at least one of information indicating whether or not and information on transmission power of a notification message.

According to another embodiment, the notification message MESSAGE_NOTI may further include at least one of information on reception power of the most recently received advertisement packet, information on vehicle movement, and GPS information.

The communication unit 1306 may transmit a notification message MESSAGE_NOTI to the vehicle 1310 . When the number of first advertisement packets received for a predetermined time is equal to or greater than the first threshold, the communication unit 1306 may transmit a notification message MESSAGE_NOTI to the vehicle 1310 in a first cycle. When the number of second advertisement packets received for a predetermined time is equal to or greater than the second threshold, the communication unit 1306 may transmit the notification message MESSAGE_NOTI to the vehicle 1310 in a second period shorter than the first period.

The vehicle 1310 may determine recovery of UWB ranging. According to an embodiment, the vehicle 1310 may determine recovery of UWB ranging based on information about the transmission power of the notification message MESSAGE_NOTI. According to another embodiment, the vehicle 1310 transmits information on the transmission power of the stored advertisement packet (PACKET_ADVT) and the information on the reception power of the advertisement packet (PACKET_ADVT) included in the notification message (MESSAGE_NOTI), the UWB lane You can decide on the recovery of Jing. For example, the vehicle 1310 may determine that the electronic device 1302 is closer to the vehicle as the difference between the transmission power of the packet PACKET_ADVT and the reception power of the advertisement packet PACKET_ADVT is smaller.

The vehicle 1310 may transmit a recovery request RQ_RECOVER to the electronic device 1302 , and the processor 1304 and the vehicle 1310 may recover UWB ranging.

14 is a diagram for explaining a method of recovering UWB ranging between a device and a vehicle.

The device 1402 and the vehicle 1404 may correspond to the first electronic device 302 and the second electronic device 304 described above with reference to FIG. 3 , respectively.

In step S1402 , the device 1402 may transmit an event notification message to the vehicle 1404 ( 1404 ). According to an embodiment, the sub-event category of the event notification message may include a device BLE range status sub-event (Device BLE Range Status SubEvent).

Hereinafter, an event notification message that can be exchanged between devices according to various embodiments of the present disclosure will be described in detail.

[Table 1]

Table 1 shows parameters of an event notification message (DCK Event Notification) and an event notification message (DCK Event Notification).

A parameter of the event notification message (DCK Event Notification) may include a sub-event category (Subevent_Category) and a sub-event code (Subevent_Code). A unique ID may be assigned to an event notification message (DCK Event Notification). For example, the ID of the event notification message (DCK Event Notification) may have a value of '17'. The event notification message (DCK Event Notification) may be used to summarize events generated by endpoints participating in the ranging exchange. For example, an endpoint may refer to a digital key object within an applet.

[Table 2]

Table 2 shows the definition of parameters for the event notification message (DCK Event Notification).

According to an embodiment, the parameters of the event notification message (DCK Event Notification) may include a sub-event category (Subevent_Category), a code length for a sub-event (SubEvent_Code_length), and a sub-event code (Subevent_Code). have.

A sub-event category (Subevent_Category) has a size of 1 octet, and 1 octet may represent 8 bits. A sub-event category (Subevent_Category) will be described later with reference to Table 3.

The length of the code for the sub-event (SubEvent_Code_length) may have a size of 1 octet. The length of the code for the sub-event (SubEvent_Code_length) may indicate the length of the code (Subevent_Code) of the sub-event.

The size of the code (Subevent_Code) of the sub-event may be variable. The sub-event code (Subevent_Code) may be defined for each category, as will be described later.

[Table 3]

Table 3 shows parameters of a category of a sub-event (DCK Subevent_Category) and categories of sub-events (DCK Subevent_Category).

The sub-event category (DCK Subevent_Category) may include a first sub-event (Command Complete SubEvent) to a seventh sub-event (Device BLE Range Status SubEvent).

The category (DCK Subevent_Category) of the sub-event for the first sub-event (Command Complete SubEvent) may have a value of '1'. A parameter of the first sub-event (Command Complete SubEvent) may include a command status (Command_Status). The first sub-event (Command Complete SubEvent) can be used to send the appropriate code as soon as the last message is processed.

The category (DCK Subevent_Category) of the sub-event for the second sub-event (Ranging Session Status Changed SubEvent) may have a value of '2'. A parameter of the second sub-event (Ranging Session Status Changed SubEvent) may include a session status (Session_Status). A second sub-event (Ranging Session Status Changed SubEvent) may indicate the start, progress, and completion of a UWB-related action. A second sub-event (Ranging Session Status Changed SubEvent) may be generated by both the device 1402 and the vehicle 1404 .

A category (DCK Subevent_Category) of a sub-event for the third sub-event (Device Status Changed SubEvent) may have a value of '3'. A parameter of the third sub-event (Device Status Changed SubEvent) may include a device status (Device_Status). A third sub-event (Device Status Changed SubEvent) may be generated in response to a change to the status of the device 1402 . The device status (Device_Status) may indicate a new status of the initiator.

The category (DCK Subevent_Category) of the sub-event for the fourth sub-event (Vehicle Status Change SubEvent) may have a value of '4'. A parameter of the fourth sub-event (Vehicle Status Change SubEvent) may include a vehicle status (Vehicle_Status). A fourth sub-event (Vehicle Status Change SubEvent) may be generated when the vehicle 1404 changes status to notify eligible devices of a vehicle status change. The vehicle status (Vehicle_Status) indicates a new status of the vehicle 1404 , and as will be described later with reference to Table 11, the vehicle status (Vehicle_Status) may be encoded as a Tag Length Value (TLV).

The category (DCK Subevent_Category) of the sub-event for the fifth sub-event (RKE Request Subevent) may have a value of '5'. A parameter of the fifth sub-event (RKE Request Subevent) may include a requested action (Requested_Action). The fifth sub-event (RKE Request Subevent) may be generated in response to a user's request for performing any one of the first requested action (Requested_action_lock) to the third requested action (Requested_action_alarm) defined in Table 13. The requested action (Requested_Action) may indicate a first requested action (Requested_action_lock) to a third requested action (Requested_action_alarm) requested by the initiator.

The category (DCK Subevent_Category) of the sub-event for the sixth sub-event (Control Flow SubEvent) may have a value of '6'. A parameter of the sixth sub-event (Control Flow SubEvent) may include a transaction status. A sixth sub-event (Control Flow SubEvent) may be generated to indicate the final success or failure of a transaction or to send application-specific codes to the device 1402 .

The category (DCK Subevent_Category) of the sub-event for the seventh sub-event (Device BLE Range Status SubEvent) may have a value of '7'. The parameter of the seventh sub-event (Device BLE Range Status SubEvent) may include the BLE range status (DBR_Status) of the device. A seventh sub-event (Device BLE Range Status SubEvent) may be generated to indicate whether the device 1402 is included within the LE 1M PHY communication range from the vehicle 1404 .

[Table 4]

Table 4 shows the definition of the command status (Command_Status).

The command status (Command_Status) may have a size of 1 octet. Codes for the command status (Command_Status) will be described later with reference to Table 5.

[Table 5]

Table 5 is a list indicating the command status (Command_Status) for the first sub-event (Command Complete SubEvent).

The command status Command_Status may include a first command status Deselect_SE to a sixth command status Deselect_SE.

The first command state Deselect_SE may have a code value of '0x00'. Vehicle 1404 may send a sub-event with a first command state (Deselect_SE) to device 1402 instead of DESELECT commands.

The second command state Device_SE_busy may have a code value of '0x01'. The second command state (Device_SE_busy) may indicate that the device 1402 is currently in a busy state, so that it will try again within a predetermined time. Optionally, the predetermined time may have units of milliseconds (ms).

The third command state Device_timeout may have a code value of '0x02'. A third command state (Device_timeout) indicates a request for the device 1402 to resend the timed out message to the vehicle 1404 due to a timeout.

The fourth command state (Restart_standard_transaction) may have a code value of '0x03'. The fourth command state (Restart_standard_transaction) may indicate that the standard transaction is restarted from the Application Protocol Data Unit (APDU) command because the standard transaction has timed out.

The fifth command state Require_capability_exchange may have a code value of '0x04'. The fifth command state (Require_capability_exchange) may indicate to start capability exchange when a protocol or UWB environment setting is mismatched.

The sixth command state BLE_pairing_ready may have a code value of '0x05'. The vehicle 1404 may transmit a sub-event having a sixth command state (BLE_pairing_ready) to the device 1402 when preparation for BLE pairing is completed while the first access flow is performed.

[Table 6]

Table 6 shows the definition of the session status (Session_Status).

The session status (Session_Status) may have a size of 1 octet. Codes for the session status (Session_Status) will be described later with reference to Table 7.

[Table 7]

Table 7 is a list indicating the status (Session_Status) of the session for the second sub-event (Ranging Session Status Changed SubEvent).

The session state (Session_Status) may include a first session state (Ranging_session_URSK_refresh_subevent) to an eighth session state (Ranging_session_vehicle_state_request_subevent).

The first session state (Ranging_session_URSK_refresh_subevent) may have a code value of '0x00'. The initiator can clean-up the previously obtained URSK information.

The second session state (Ranging_session_URSK_not_found_subevent) may have a code value of '0x01'. The second session state (Ranging_session_URSK_not_found_subevent) may indicate a case in which the device 1402 does not find information URSK for the ID (UWB_Session_Id) of the UWB session.

The third session state (Ranging_session_SR_established_subevent) may have a code value of '0x02'. The third session state (Ranging_session_SR_established_subevent) may indicate a case in which the vehicle 1404 successfully establishes security ranging.

The fourth session state (Ranging_session_SR_failed_subevent) may have a code value of '0x03'. The fourth session state (Ranging_session_SR_failed_subevent) may indicate a case in which the vehicle 1404 fails to establish a security ranging (SR).

The fifth session state (Ranging_session_timed_out_subevent) may have a code value of '0x04'. The fifth session state (Ranging_session_timed_out_subevent) may indicate a case in which the initiator stops ranging due to timeout.

The sixth session state (Ranging_session_device_detected_inside_subevent) may have a code value of '0x05'. The sixth session state (Ranging_session_device_detected_inside_subevent) may indicate a case in which the device 1402 is detected inside.

The seventh session state (Ranging_session_recovery_failed_subevent) may have a code value of '0x06'. The seventh session state (Ranging_session_recovery_failed_subevent) may indicate a case in which the recovery of ranging for the ID (UWB_Session_Id) of the UWB session has failed.

The eighth session state (Ranging_session_vehicle_state_request_subevent) may have a code value of '0x07'. The eighth session state (Ranging_session_vehicle_state_request_subevent) may indicate a case where the device 1402 makes a request for a current state of the vehicle 1404 .

[Table 8]

Table 8 shows the definition of the device status (Device_Status).

The device status (Device_Status) may have a size of 1 octet. Codes for the device status (Device_Status) will be described later with reference to Table 9.

[Table 9]

Table 9 is a list indicating the device status (Device_Status) for the third sub-event (Device Status Changed SubEvent).

The device status (Device_Status) may include a first device status (Device_authenticated) and a second device status (Device_authentication_failed).

The first device state (Device_authenticated) may have a code value of '0x00'. The first device state (Device_authenticated) may be used to inform the vehicle 1404 of the information that the device 1402 has completed local authentication of the device 1402 .

The second device state (Device_authentication_failed) may have a code value of '0x01'. The second device status (Device_authentication_failed) may be used to inform the vehicle 1404 that the local authentication of the device 1402 has failed to the device 1402 . For example, when the Secure Element (SE) authentication fails, the vehicle 1404 may transmit a third sub-event (Device Status Changed SubEvent) to the accessing device 1402 . Vehicle 1404 may then disconnect from device 1402 and clean-up the database to delete associated keys.

[Table 10]

Table 10 shows the definition of the vehicle status (Vehicle_Status).

The vehicle status (Vehicle_Status) may have a variable size. Codes for the vehicle status (Vehicle_Status) will be described later with reference to Table 11.

[Table 11]

Table 11 is a list indicating the vehicle status (Vehicle_Status) for the fourth sub-event (Vehicle Status Change SubEvent).

The vehicle status (Vehicle_Status) may include a first tag (TBD0) to a fourth tag (TBDXX).

The first tag TBD0 may have a size of 1 octet. The first tag TBD0 may indicate the last requested action execution status. The first tag TBD0 may include a first vehicle state and a second vehicle state. The first vehicle state may have a code value of '0x00'. The first vehicle state may indicate information that the action was successfully executed. The second vehicle state may have a code value of '0x01'. The second vehicle state may indicate information that the action was not executed. The first tag TBD0 may not exist if no action is requested.

The second tag TBD1 may have a size of 1 octet. The second tag TBD1 may indicate a locked state of the vehicle 1404 . The second tag TBD1 may include a third vehicle state and a fourth vehicle state. The third vehicle state may have a code value of '0x00'. The third vehicle state may indicate information that the vehicle 1404 is locked. The fourth vehicle state may have a code value of '0x01'. The fourth vehicle state may indicate information that the vehicle is not locked. The second tag TBD1 may be present when the last action triggered by the device 1402 is a locking state change.

The third tag TBD2 may have a size of 1 octet. The third tag TBD2 may indicate an ignition state of the vehicle 1404 . The third tag TBD2 may include a fifth vehicle state and a sixth vehicle state. The fifth vehicle state may have a code value of '0x00'. The fifth vehicle state may indicate information that the vehicle 1404 is not ignited. The sixth vehicle state may have a code value of '0x01'. The sixth vehicle state may indicate information that the vehicle is ignited. Third tag TBD2 may be present if the last action triggered by device 1402 is a locking state change.

The fourth tag TBDXX may have a variable size. The fourth tag TBDXX may indicate a property status of an Original Equipment Manufacturer (OEM) of the vehicle. The fourth tag TBDXX is optional, and the OEM conformance status of the vehicle may be communicated to the OEM application interface of the vehicle.

[Table 12]

Table 12 shows the definition of the requested action (Requested_Action).

The requested action (Requested_Action) may have a size of 1 octet. Codes for the requested action (Requested_Action) will be described later with reference to Table 13.

[Table 13]

Table 13 is a list indicating the requested action (Requested_Action) for the fifth sub-event (RKE Request Subevent).

The requested action (Requested_Action) may include a first requested action (Requested_action_lock) to a third requested action (Requested_action_alarm).

The first requested action (Requested_action_lock) may have a code value of '0x00'. The first requested action (Requested_action_lock) may indicate a case in which the initiator requests a remote lock. When the vehicle 1404 receives a fifth sub-event (RKE Request Subevent) including the first requested action (Requested_action_lock) from the device 1402 , it may execute a flow called “Sign”.

The second requested action (Requested_action_unlock) may have a code value of '0x01'. The second requested action (Requested_action_unlock) may indicate a case in which the initiator requests remote unlocking. When the vehicle 1404 receives a fifth sub-event (RKE Request Subevent) including the second requested action (Requested_action_unlock) from the device 1402 , it may execute a flow called “Sign”.

The third requested action (Requested_action_alarm) may have a code value of '0x02'. The third requested action (Requested_action_alarm) may indicate a case in which the initiator requests a remote notification. When the vehicle 1404 receives a fifth sub-event (RKE Request Subevent) including the third requested action (Requested_action_alarm) from the device 1402 , it may execute a flow called “Sign”.

[Table 14]

Table 14 shows parameters of the sixth sub-event (Control Flow SubEvent).

A sixth sub-event (Control Flow SubEvent) may include a first parameter P1 and a second parameter P2. The first parameter P1 and the second parameter P2 may each have a size of 1 octet. The first parameter P1 may indicate a main action triggered by the command, and the second parameter P2 may provide a reason code.

[Table 15]

Table 15 shows parameters of the seventh sub-event (Device BLE Range Status SubEvent).

The seventh sub-event (Device BLE Range Status SubEvent) may correspond to the notification message described above with reference to FIGS. 3 to 13 . The seventh sub-event (Device BLE Range Status SubEvent) may include a first range state (LE_1M_PHY_Range) and a second range state (TX_Power).

The first range state LE_1M_PHY_Range may indicate information regarding whether the device 1402 is included in the first range from the vehicle 1404 . Optionally, the first range may include a range of the LE 1M PHY. The first range state LE_1M_PHY_Range may have a size of 1 octet.

When the code value for the first range state (LE_1M_PHY_Range) is '0x00', the first range state (LE_1M_PHY_Range) may indicate a case in which the device 1402 is included outside the LE 1M PHY range. When the code value for the first range state (LE_1M_PHY_Range) is '0x01', the first range state (LE_1M_PHY_Range) may indicate a case in which the device 1402 is included in the LE 1M PHY range.

The second range state TX_Power may indicate information about the transmission power of the seventh sub-event. The second range state TX_Power may have a size of 1 octet. The transmission power of the seventh sub-event (Device BLE Range Status SubEvent) may be in millidecibel (dBm) units, and the value of the second range state (TX_Power) is the transmission power of the seventh sub-event (Device BLE Range Status SubEvent). It may be a value obtained by adding a value of 20 dBm to power.

According to one embodiment, a seventh sub-event (Device BLE Range Status SubEvent) may be generated to indicate whether the device 1402 is included in the LE 1M PHY communication range from the vehicle 1404 . The vehicle 1404 may use the parameters listed in Table 15 to determine when to recover from an interruption of UWB range.

According to one embodiment, the device 1402 may transmit a seventh sub-event (Device BLE Range Status SubEvent) to the vehicle 1404 based on the advertisement packet of the LE 1M PHY type received from the vehicle 1404 . Vehicle 1404 may periodically send advertisement packets of type LE 1M PHY to device 1402 .

The device 1402 may determine whether the device 1402 is included within the LE 1M PHY range from the vehicle 1402 based on the received advertisement packet of the LE 1M PHY type. According to an embodiment, the device 1402 may determine that the device 1402 is within the LE 1M PHY range from the vehicle 1402 when the number of received LE 1M PHY type advertisement packets is equal to or greater than a first threshold. have.

When the device 1402 determines that the device 1402 is within the LE 1M PHY range from the vehicle 1402 , the device 1402 may send a Device BLE Range Status SubEvent to the vehicle 1404 . For example, the device 1402 may periodically transmit seventh sub-events (Device BLE Range Status SubEvent) to the vehicle 1404 . Also, the device 1402 may transmit a seventh sub-event (Device BLE Range Status SubEvent) to the vehicle 1404 only when the value of the first range state (LE_1M_PHY_Range) is changed.

In step S1404, the vehicle 1404 may determine whether to recover from the cessation of UWB ranging. The vehicle 1404 may determine whether to recover from the cessation of UWB ranging based on the seventh sub-event (Device BLE Range Status SubEvent) message received in step S1402. The vehicle 1404 determines the received signal strength of the seventh sub-event (Device BLE Range Status SubEvent) measured in the vehicle 1404 and the second range state (TX_Power) of the seventh sub-event (Device BLE Range Status SubEvent). By comparing the transmit power of the included seventh sub-event (Device BLE Range Status SubEvent), the distance between the device 1402 and the vehicle 1404 may be determined. The vehicle 1404 may determine whether to initiate a UWB ranging recovery flow based on the determined distance between the device 1402 and the vehicle 1404 .

In step S1406 , the device 1402 and the vehicle 1404 may select and perform a UWB ranging recovery flow. Since the detailed process of performing the UWB ranging recovery flow has been described above with reference to FIG. 11 , a redundant description will be omitted.

Various embodiments of the present disclosure have been described above. The foregoing description of the present disclosure is for illustrative purposes only, and embodiments of the present disclosure are not limited to the disclosed embodiments. Those of ordinary skill in the art to which the present disclosure pertains will understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present disclosure. The scope of the present disclosure is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present disclosure. do.

Claims (20)

In the first electronic device for performing ranging through Ultra Wide Band (UWB) with the second electronic device,
communication department; and
at least one processor
including,
the at least one processor
transmitting a notification message indicating that the first electronic device is within a predetermined range from the second electronic device to the second electronic device based on the advertisement packet received from the second electronic device;
receiving a UWB ranging recovery signal from the second electronic device in response to the notification message;
controlling the communication unit to recover ranging through the UWB with the second electronic device in response to the UWB ranging recovery signal
A first electronic device.
According to claim 1,
The advertisement packet includes at least one of a first advertisement packet of the LE Coded PHY type and a second advertisement packet of the LE 1M PHY type.
A first electronic device.
3. The method of claim 2,
the at least one processor
Receive a plurality of first advertisement packets, and include information that the first electronic device is within a first range from the second electronic device when the number of the first advertisement packets received for a predetermined time is equal to or greater than a first threshold controlling the communication unit to transmit the notification message to the second electronic device
A first electronic device.
4. The method of claim 3,
the at least one processor
When receiving a plurality of second advertisement packets, and when the number of the second advertisement packets received during the predetermined time is equal to or greater than a second threshold, information that the first electronic device is within a second range from the second electronic device but controlling the communication unit to transmit the notification message including
wherein the first range is wider than the second range
A first electronic device.
3. The method of claim 2,
If it is determined based on at least one of the first advertisement packet and the second advertisement packet that the first electronic device is included in the first range from the second electronic device and is outside the second range, a notification is made in a first period sending messages to the second electronic device
A first electronic device.
6. The method of claim 5,
If it is determined based on at least one of the first advertisement packet and the second advertisement packet that the first electronic device is within the second range from the second electronic device, the second electronic device is sent to the second electronic device in a second cycle. Send notification messages,
wherein the second period is shorter than the first period
A first electronic device.
According to claim 1,
The notification message is
and at least one of information on whether the first electronic device is within the predetermined range from the second electronic device and information on transmission power of the notification message.
A first electronic device.
3. The method of claim 2,
The notification message is
at least one of information on the reception power of the most recently received first advertisement packet and information on the reception power of the most recently received second advertisement packet;
A first electronic device comprising:
According to claim 1,
the at least one processor
detecting information on the movement of the first electronic device,
The notification message is
the information on the movement of the first electronic device
A first electronic device comprising:
According to claim 1,
The notification message is
information on Global Positioning System (GPS) measurement values related to the location of the first electronic device
A first electronic device comprising:
A method for a first electronic device to perform ranging with a second electronic device through Ultra Wide Band (UWB), the method comprising:
transmitting, to the second electronic device, a notification message indicating that the first electronic device is within a predetermined range from the second electronic device, based on the advertisement packet received from the second electronic device;
receiving a UWB ranging recovery signal from the second electronic device in response to the notification message; and
recovering ranging through the UWB in response to the UWB ranging recovery signal
How to include.
12. The method of claim 11,
The advertisement packet includes at least one of a first advertisement packet of the LE Coded PHY type and a second advertisement packet of the LE 1M PHY type.
Way.
13. The method of claim 12,
The step of sending the notification message is,
receiving a plurality of first advertisement packets; and
transmitting the notification message including information that the first electronic device is within a first range from the second electronic device when the number of the first advertisement packets received for a predetermined time is equal to or greater than a first threshold; How to.
14. The method of claim 13,
The step of sending the notification message is,
receiving a plurality of second advertisement packets; and
transmitting the notification message including information that the first electronic device is within a second range from the second electronic device when the number of the second advertisement packets received during the predetermined time is equal to or greater than a second threshold; including more,
wherein the first range is wider than the second range.
13. The method of claim 12,
The step of sending the notification message is
If it is determined based on at least one of the first advertisement packet and the second advertisement packet that the first electronic device is included in the first range from the second electronic device and is outside the second range, a notification is made in a first period sending messages
How to include.
16. The method of claim 15,
The step of sending the notification message is
transmitting the notification messages at a second period when it is determined based on at least one of the first advertisement packet and the second advertisement packet that the first electronic device is within the second range from the second electronic device;
further comprising,
and the second period is shorter than the first period.
12. The method of claim 11,
The notification message is
and at least one of information on whether the first electronic device is within the predetermined range from the second electronic device and information on transmission power of the notification message.
13. The method of claim 12,
The notification message is
A method comprising at least one of information on the reception power of the most recently received first advertisement packet and information on the reception power of the most recently received second advertisement packet.
12. The method of claim 11,
Further comprising the step of detecting information about the movement of the first electronic device,
The notification message is
A method including the information about the movement of the first electronic device.
12. The method of claim 11,
The notification message is
information on Global Positioning System (GPS) measurement values related to the location of the first electronic device
A method comprising

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