KR20230062027A - Method for Providing Ultra Wide Band Secure Ranging based on Multi BLE - Google Patents

Abstract

A multi-BLE based UWB security ranging method is disclosed. Provided is the multi-BLE based UWB security ranging method which applies a multi-BLE chipset for ranging between a UWB initiator and a responder to enable fast ranging between UWB devices using scan and advertise manners.

Description

Multi-BLE based UWB secure ranging method {Method for Providing Ultra Wide Band Secure Ranging based on Multi BLE}

An embodiment of the present invention relates to a multi-BLE based UWB security ranging method.

The contents described below merely provide background information related to the present embodiment and do not constitute prior art.

In order to perform UWB-based ranging, ranging is only possible when a UWB initiator and a responder know each other's ID information (Mac information).

As shown in FIG. 1, ranging is possible only when the UWB initiator and the responder know each other's MAC information, and then UWB communication can be started. For ranging between the UWB initiating device and the responding device, information is exchanged by exchanging information between devices using a communication technology other than UWB. BLE, WiFi, Zigbee, LTE, 5G, etc. can be used in addition to UWB for ranging between the UWB initiator and the responder, but BLE is usually used as the main for mobile support.

As shown in FIG. 2, the UWB initiator and the responder take several seconds to connect due to a method of exchanging data several times in the Bluetooth pairing method.

As shown in FIG. 2, the UWB initiator and the response device perform Bluetooth pairing with each other, exchange key information with each other, and then perform ranging.

A general communication method of BLE performs data communication through pairing between devices. In other words, as shown in FIG. 2, the UWB initiator and the responder have a problem in that it takes several seconds to connect due to the method of exchanging data several times in the Bluetooth pairing method.

When performing BLE communication before performing UWB communication, the UWB initiating device and the responding device must perform pairing and register the devices to enable communication.

Generally, in a method recognized as UWB, data is exchanged with each other through Bluetooth and then communication is performed through UWB. The UWB communication method is mainly applied to and used for door locks. One of the reasons why UWB communication is used is that packet contents cannot be checked in terms of hardware. In other words, Bluetooth or WiFi encrypts data, but since the specifications are standardized, the information is exposed as the pay of the packet.

In order to use Bluetooth communication, a device must be registered using pairing between a UWB initiator and a response device. However, when pairing devices are registered between a UWB initiator and a response device using Bluetooth, UWB communication is difficult when quickly passing through a specific area or passing in one of a plurality of directions.

In this embodiment, a multi-BLE chipset is applied for ranging between a UWB initiator and a responder, and a fast lane between UWB devices is achieved using a scan method and an advertise method. The purpose is to provide a multi-BLE-based UWB security ranging method that enables ranging.

According to an aspect of this embodiment, the process of scanning the locator around the tag using BLE (Bluetooth Low Energy); A process of advertising locator information to the surroundings using BLE2 in the locator; receiving locator information from the locator using BLE in the tag; advertising ranging information from the tag to the locator corresponding to the locator information; receiving the ranging information from the tag using BLE1 in the locator; and performing ultra wide band (UWB) communication with the tag without pairing based on the ranging information in the locator.

As described above, according to the present embodiment, a multi-BLE chipset is applied for ranging between a UWB initiator and a responder, and a scan method and advertisement In this way, there is an effect of enabling fast ranging between UWB devices.

1 is a diagram illustrating a general UWB ranging method.
2 is a diagram illustrating a general Bluetooth pairing method.
3 is a diagram illustrating a multi-BLE based scheme according to this embodiment.
4 is a diagram illustrating a UWB secure ranging method according to the present embodiment.
5 is a diagram illustrating a 1:N authentication method according to the present embodiment.
6 is a diagram illustrating a single BLE authentication process between a locator and a tag according to the present embodiment.
7 is a diagram illustrating a multi-BLE authentication process between a locator and a tag according to the present embodiment.

Hereinafter, this embodiment will be described in detail with reference to the accompanying drawings.

3 is a diagram showing a multi-BLE (Bluetooth Low Energy) based scheme according to this embodiment.

Due to the nature of UWB, it uses UWB authentication technology based on a fast data communication method with higher recognition performance than the general BLE method. By applying a multi-BLE chipset, fast ranging between UWB devices is possible based on a scan method and an advertise method.

The locator 320, which is a UWB responder, always scans the tag 310, which is a UWB initiator, using BLE1. The locator 320, which is a UWB response device, continuously scans the data of the tag 310, which is a UWB initiator, continuously using BLE1.

The locator 320, which is a UWB response device, always advertises locator information to the tag 310, which is a UWB initiator, using BLE2. The locator 320, which is a UWB response device, continuously transmits data to the tag 310, which is a UWB initiator, using BLE2.

The locator 320, which is a UWB response device, performs advertising with the tag 310, which is a UWB initiator, using BLE2, and then conducts advertising between the locator 320, which is a UWB response device, and the tag 310, which is a UWB initiator. Execute transactions. The tag 310, a UWB initiator, performs ranging with the locator 320, a UWB response device, based on MAC information using BLE1.

Although the tag 310 and the locator 320 perform authentication based on Bluetooth, packet contents cannot be confirmed because hardware encryption is performed after exchanging talk with each other. After exchanging tokens in the Bluetooth method, each token is encrypted in hardware.

The locator 320, which is a UWB response device according to this embodiment, includes two or more BLE modules. The locator 320, which is a UWB response device, scans the tag 310, which is a UWB initiator, using BLE1 of the two BLEs. When the UWB initiator tag 310 is scanned using BLE1, the locator 320, which is a UWB response device, advertises the locator information to the scanned UWB initiator tag 310 using BLE2 among the two BLEs. Jing

The tag 310, which is a UWB initiator, and the locator 320, which is a response device, sequentially perform advertising after scanning without a BLE pairing process. When performing fast ranging without a pairing process with the tag 310, which is a UWB initiator, and the locator 320, which is a response device, in a 1:N manner, performing scanning and then advertising to perform fast communication without pairing let it do

The tag 310, which is a UWB initiator, needs to know information between the locator 320, which is a response device, and each other in order to perform UWB communication. When information is broadcasted by the locator 320, which is a response device, the tag 310, which is a UWB initiator, scans the information to confirm the information, and then the tag 310 determines the distance from the locator 320.

The locator 320 always scans using BLE1. Locator 320 always advertises locator information using BLE2. The locator 320 continuously scans using BLE1, and transmits its own locator information right back to the tag 310 using BLE2 as soon as information is received from the tag 310.

The locator 320 advertises locator information using BLE2. The tag 310 receives advertised information from the locator 320 using BLE2. The tag 310 advertises ranging information back to the locator 320 based on the information received from the locator 320 . The locator 320 continuously scans using BLE1 and receives ranging information (UWB MAC Address) from the tag 310. The locator 320 starts ranging based on ranging information received from the tag 310 . The locator 320 starts ranging and calculates a distance value with the tag 310 . The locator 320 calculates a distance value from the tag 310 and then performs a ranging end process. The locator 320 may perform a specific operation according to a distance value from the tag 310 . For example, the locator 320 may perform payment when the distance value from the tag 310 is within 50 cm.

The locator 320 transmits and receives data with the tag 310 without pairing using BLE1 and BLE2. The locator 320 operates BLE1 and BLE2 in units of 20 msec. Due to the process between BLE1 and BLE2, the time between the locator 320 and the tag 310 is shortened without pairing, and communication is performed within about 50 to 100 msec to transmit and receive data.

4 is a diagram illustrating a UWB secure ranging method according to the present embodiment.

As shown in FIG. 4 , the tag 310 and the locator 320 exchange data through BLE and then perform UWB ranging. The host in the tag 310 exchanges APDUs (Application Protocol Data Units) with the host in the locator 320 through BLE before performing UWB communication. The host in the tag 310 and the host in the locator 320 use a service applet, a Secondary Uses Service (SUS) library, and SUS to exchange APDUs, and when the APDU is authenticated, they use UWB to transmit the exchanged APDUs to each other. carry out communication

4 shows a security chip area. After the tag 310 and the host in the locator 320 exchange information with each other using Bluetooth, encryption is performed. When encryption is performed using each security chip in the tag 310 and the locator 320, packet contents other than the UWB initiator and the response device cannot be checked for data communicated through BLE. The tag 310 and the locator 320 use each encryption chip to encrypt a pair of encryption keys commonly used by both sides.

The tag 310 and the locator 320 receive a pair of encryption key information using BLE and perform encryption in hardware using each encryption chip. The tag 310 and the locator 320 encrypt the data to be sent and the encryption key value together and transmit/receive them using UWB communication. Since the tag 310 and the locator 320 first perform BLE communication at the front end before performing UWB communication, after receiving encryption key information using BLE, encrypting it using each encryption chip, data is transmitted through UWB communication. send along with

5 is a diagram illustrating a 1:N authentication method according to the present embodiment.

The tag 310, which is a UWB initiator, also performs fast authentication with the locators 320, which are a plurality of UWB response devices based on multi-BLE.

The locator 320, which is a plurality of UWB response devices scanned by the tag 310, which is a UWB initiator, is checked. Then, the MAC information of the tag 310, which is the UWB initiator, is advertised so that the locator 320, which is a multi-BLE device, the UWB response device, receives the MAC information of the tag 310, which is the UWB initiator. The tag 310, a UWB initiator, checks the MAC information of a plurality of target devices and sequentially performs ranging with the locator 320, a UWB response device.

When the plurality of locators 320 exist, the tag 310 attempts communication with the locator 320 having the nearest BLE among the plurality of locators 320 from about 15 meters ago. The tag 310 first performs communication with the nearest locator 320 among the plurality of locators 320 . The tag 310 may perform multiple ranging in a 1:N manner. The same process occurs 1 to n times.

6 is a diagram illustrating a single BLE authentication process between a locator and a tag according to the present embodiment.

The tag 310 scans the surrounding locators 320 using BLE (S610). The locator 320 advertises locator information to the surroundings using the provided single BLE (S612). The tag 310 receives locator information from the locator 320 (S614).

The tag 310 connects to the corresponding locator 320 using the locator information received from the locator 320 (S616). The tag 310 and the locator 320 connected to each other exchange ranging information (UWB MAC Address) (S618). The tag 310 and the locator 320 exchange ranging information (UWB MAC address) and then disconnect (S620).

After disconnecting from the tag 310, the locator 320 performs UWB communication with the tag 310 based on ranging information (UWB MAC address) exchanged with the tag 310 (S622). The locator 320 calculates a distance value to the tag 310 based on the UWB (S624). The locator 320 terminates UWB communication with the tag 310 (S626). The locator 320 reports the calculated distance value to an external device or internal processor (S628).

After disconnecting from the locator 320, the tag 310 performs UWB communication with the locator 320 based on ranging information (UWB MAC address) exchanged with the locator 320 (S632). The tag 310 calculates a distance value from the locator 320 based on UWB (S634). The tag 310 terminates UWB communication with the locator 320 and turns off power (S636). The tag 310 operates in a sleep mode (S638).

Although it is described in FIG. 6 that steps S612 to S638 are sequentially executed, it is not necessarily limited thereto. In other words, since it will be applicable to changing and executing the steps described in FIG. 6 or executing one or more steps in parallel, FIG. 6 is not limited to a time-series sequence.

As described above, a single BLE authentication process between the locator and the tag according to the present embodiment described in FIG. 6 may be implemented as a program and recorded on a computer-readable recording medium. A program for implementing a single BLE authentication process between a locator and a tag according to this embodiment is recorded, and the computer-readable recording medium includes all types of recording devices in which data readable by a computer system is stored.

7 is a diagram illustrating a multi-BLE authentication process between a locator and a tag according to the present embodiment.

The tag 310 scans the surrounding locators 320 using BLE (S710). The locator 320 advertises locator information to surroundings using BLE2 among the two BLEs provided (S712). The tag 310 receives locator information from the locator 320 (S714). The tag 310 advertises ranging information (UWB MAC address) to the corresponding locator 320 using the locator information received from the locator 320 (S716).

The locator 320 receives ranging information (UWB MAC Address) from the tag 310 using BLE1 among the two BLEs provided (720).

The locator 320 performs UWB communication with the tag 310 based on the ranging information (UWB MAC address) received from the tag 310 (S722). The locator 320 calculates a distance value to the tag 310 based on the UWB (S724). The locator 320 performs a ranging end process (S726). The locator 320 terminates UWB communication with the tag 310 (S728). The locator 320 reports the calculated distance value to an external device or internal processor (S730).

When the locator 320 receives ranging information (UWB MAC address) from the tag 310 using BLE1, it advertises the locator information to surroundings using BLE2 (S732 and S734).

The tag 310 performs UWB communication with the locator 320 based on the ranging information (UWB MAC address) transmitted to the locator 320 (S740). The tag 310 calculates a distance value from the locator 320 based on UWB (S742). The tag 310 ends advertising of the ranging information (UWB MAC address) being transmitted to the locator 320 (S744).

The tag 310 terminates UWB communication with the locator 320 and turns off power (S746). The tag 310 operates in a sleep mode (S748).

Although it is described in FIG. 7 that steps S710 to S748 are sequentially executed, it is not necessarily limited thereto. In other words, since it will be applicable to changing and executing the steps described in FIG. 7 or executing one or more steps in parallel, FIG. 7 is not limited to a time-series sequence.

As described above, the multi-BLE authentication process between the locator and the tag according to the present embodiment described in FIG. 7 may be implemented as a program and recorded on a computer-readable recording medium. A program for implementing a multi-BLE authentication process between the locator and the tag according to the present embodiment is recorded and the computer-readable recording medium includes all types of recording devices in which data readable by a computer system is stored.

The above description is merely an example of the technical idea of the present embodiment, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present embodiment. Therefore, the present embodiments are not intended to limit the technical idea of the present embodiment, but to explain, and the scope of the technical idea of the present embodiment is not limited by these embodiments. The scope of protection of this embodiment should be construed according to the claims below, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of rights of this embodiment.

310: tag 320: locator

Claims (11)

Scanning a nearby locator using BLE (Bluetooth Low Energy) in a tag;
A process of advertising locator information to the surroundings using BLE2 in the locator;
receiving locator information from the locator using BLE in the tag;
advertising ranging information from the tag to the locator corresponding to the locator information;
receiving the ranging information from the tag using BLE1 in the locator;
performing ultra wide band (UWB) communication with the tag without pairing based on the ranging information in the locator;
A UWB secure ranging method comprising: According to claim 1,
After the process of performing the UWB communication,
calculating a distance value from the tag based on UWB in the locator;
performing ranging end processing in the locator;
terminating UWB communication with the tag in the locator;
reporting the distance value from the locator to an external device or an internal processor;
A UWB secure ranging method comprising: According to claim 1,
After receiving the ranging information,
The UWB security ranging method of claim 1 , wherein the locator receives ranging information from the tag using the BLE1 and then advertises the locator information to surroundings using the BLE2. According to claim 1,
After the process of performing the UWB communication,
calculating a distance value from the locator based on the UWB in the tag;
terminating advertising of the ranging information transmitted from the tag to the locator;
A UWB secure ranging method comprising: According to claim 4,
After the process of terminating the advertising,
terminating UWB communication with the locator in the tag and turning off power;
operating in a sleep mode in the tag;
A UWB secure ranging method comprising: According to claim 1,
The ranging information includes a UWB MAC address,
Wherein the locator performs UWB communication with the tag based on the UWB MAC address. According to claim 1,
The UWB security ranging method, characterized in that the tag performs scanning without pairing with a plurality of locators in a 1:N method and then performs fast ranging in an advertise method. According to claim 1,
When there are a plurality of locators, the tag tries to communicate with the plurality of locators from a preset distance, performs UWB communication with the nearest locator first, and performs ranging between the tag and the locators in a 1:N manner. UWB security ranging method, characterized in that for performing. According to claim 1,
The UWB security ranging method, characterized in that the locator operates the BLE1 and the BLE2 in units of 20 msec to shorten the time between the locator and the tag without pairing to complete communication within 50 to 100 msec. According to claim 1,
The host in the tag and the host in the locator exchange APDU (Application Protocol Data Unit) with BLE before performing UWB communication, and use the APDU as a service applet, SUS (Secondary Uses Service) library, A UWB security ranging method characterized by performing UWB communication when an APDU is authenticated using SUS. According to claim 1,
After the host in the tag and the host in the locator exchange information with each other using BLE, encryption is performed using each security chip to encrypt a pair of commonly used encryption keys, and then UWB communication together with data A UWB secure ranging method characterized by mutual transmission.

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