US-20260126540-A1 - UWB RANGING METHOD, APPARATUS AND SYSTEM

US20260126540A1US 20260126540 A1US20260126540 A1US 20260126540A1US-20260126540-A1

Abstract

A UWB ranging method, apparatus and system. The UWB ranging method comprises: a UWB apparatus receiving a ranging termination information frame in a ranging report slot, which is used for receiving the ranging termination information frame, within one ranging round; when the UWB apparatus determines that the ranging termination information frame has been received, the UWB apparatus forwarding the ranging termination information frame subsequent to the ranging report slot; and when the UWB apparatus determines that the ranging termination information frame has not been received, the UWB apparatus receiving the ranging termination information frame subsequent to the ranging report slot.

Inventors

Zhepeng MA
Daiqin ZHANG
Minnan ZHENG

Assignees

CALTERAH SEMICONDUCTOR TECHNOLOGY (SHANGHAI) CO., LTD.

Dates

Publication Date: 20260507
Application Date: 20251219
Priority Date: 20240313

Claims (12)

1 . A Ultra Wide Band (UWB) ranging method, comprising: receiving, by a UWB apparatus, a ranging termination information frame in a ranging report slot in a ranging round; forwarding, by the UWB apparatus, the ranging termination information frame subsequent to the ranging report slot when the UWB apparatus determines that the ranging termination information frame has been received; or receiving, by the UWB apparatus, the ranging termination information frame subsequent to the ranging report slot when the UWB apparatus determines that the ranging termination information frame has not been received.
2 . The UWB ranging method according to claim 1 , wherein the ranging termination information frame that is forwarded is encrypted.
3 . The UWB ranging method according to claim 1 , wherein the ranging termination information frame comprises: a plurality of ranging time differences; each of the ranging time differences represents a time difference between a transmission time of a ranging start frame and a reception time of a ranging response frame in one ranging round.
4 . The UWB ranging method according to claim 1 , wherein when the UWB apparatus determines that the ranging termination information frame has been received, the UWB apparatus forwards the ranging termination information frame in at least one forwarding slot of a plurality of forwarding slots, and the at least one forwarding slot is located subsequent to the ranging report slot.
5 . The UWB ranging method according to claim 1 , wherein the UWB apparatus forwards the ranging termination information frame in a wireless communication mode in at least one forwarding slot.
6 . The UWB ranging method according to claim 5 , wherein the wireless communication mode comprises any one of Bluetooth transmission, UWB transmission, or UWB narrowband transmission.
7 . The UWB ranging method according to claim 1 , wherein a signal transmission power used by the UWB apparatus for forwarding the ranging termination information frame is less than a signal transmission power used by the UWB apparatus for transmitting a ranging response frame in the ranging round.
8 . The UWB ranging method according to claim 1 , wherein the UWB apparatus forwards the ranging termination information frame over a wired link.
9 . The UWB ranging method according to claim 8 , wherein the UWB apparatus directly forwards the ranging termination information frame over the wired link; or the UWB apparatus forwards the ranging termination information frame through a controller connected to the UWB apparatus.
10 . A UWB apparatus comprising a memory, a processor, and a UWB ranging program stored in the memory and executable by the processor, wherein when the UWB ranging program is executed by the processor, steps of the UWB ranging method according to claim 1 are implemented.
11 . A UWB ranging system comprising a plurality of first UWB apparatuses, wherein at least one of the first UWB apparatuses is the UWB apparatus according to claim 10 , the UWB ranging system further comprises a second UWB apparatus; wherein in one ranging round, the plurality of first UWB apparatuses measure distances from the second UWB apparatus to the plurality of first UWB apparatuses respectively.
12 . The UWB ranging system according to claim 11 , wherein the second UWB apparatus is provided on an electronic device to have a digital key function, and the plurality of first UWB apparatuses are each arranged on a vehicle.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The present application is a continuation-in-part of International Application PCT/CN2025/076960 having an international filing date of February 12, 2025, which claims the benefit of and priority to Chinese Patent Application No. 202410289397.4 filed with the CNIPA on March 13, 2024, and titled "UWB Ranging Method, Apparatus and System." The entire contents of the above-identified applications are incorporated by reference herein. TECHNICAL FIELD Embodiments of the present disclosure relate to, but are not limited to, the field of UWB ranging technologies, and particularly to a UWB ranging method, a UWB ranging apparatus, and a UWB ranging system. BACKGROUND With the improvement of living standards, people's demands for accurate location are further increased, and Ultra Wide Band (UWB) has emerged as a result. UWB can achieve positioning accuracy of less than 10cm, which is far superior to positioning solutions such as Global Navigation Satellite System (GNSS) and Bluetooth. Many practical functions can be developed by obtaining accurate positioning through UWB, and a Digital Key (DK) based on UWB ranging is one of them. However, in UWB ranging, because there is no Acknowledge (ACK) mechanism, one party (assumed to be an Initiator) sends a data packet to the other party (assumed to be a Responder), when a receiver (Responder) does not receive it, the sender (Initiator) is not aware of this, so the data packet will not be retransmitted, causing the current ranging to fail. More seriously, some packets carry information indicating the next scheduling, when the receiver fails to receive this information, the next ranging may also fail. SUMMARY The following is a summary of subject matter described in detail herein. This summary is not intended to limit the scope of protection of the claims. An embodiment of the present disclosure provides a UWB ranging method, including: in a ranging report slot, which is used for receiving a ranging termination information frame, in a ranging round, receiving, by a UWB apparatus, a ranging termination information frame; when the UWB apparatus determines that the ranging termination information frame has been received, forwarding, by the UWB apparatus, the ranging termination information frame subsequent to the ranging report slot; or when the UWB apparatus determines that the ranging termination information frame has not been received, receiving, by the UWB apparatus, the ranging termination information frame subsequent to the ranging report slot. Embodiments of the present disclosure further provide a UWB apparatus, wherein the UWB apparatus includes a memory, a processor, and a UWB ranging program stored in the memory and executable by the processor, and when the UWB ranging program is executed by the processor, the steps of the UWB ranging method according to any embodiment of the present disclosure are implemented. An embodiment of the present disclosure further provides a UWB ranging system, including a first UWB apparatus and a second UWB apparatus, wherein the first UWB apparatus is the UWB apparatus according to any embodiment of the present disclosure, wherein in one ranging round, a plurality of first UWB apparatuses respectively measure distances from the second UWB apparatus. In the UWB ranging method, apparatus, and system according to an embodiment of the present disclosure, when the UWB apparatus confirms that the ranging termination information frame has been received, the UWB apparatus forwards the ranging termination information frame subsequent to the ranging report slot. When the UWB apparatus confirms that the ranging termination information frame has not been received, the UWB apparatus receives the ranging termination information frame subsequent to the ranging report slot, which can improve the ranging reliability of the entire system. Since the UWB apparatus (i.e., the responder) is generally installed at the vehicle end and powered by the vehicle end, the additional transmission and reception of the UWB apparatus will not affect the power consumption of the key end or the mobile phone end, that is, the solution of the present disclosure can improve the ranging reliability of the system with almost no increase in the power consumption of the system. After the drawings and detailed description are read and understood, other aspects can be understood. BRIEF DESCRIPTION OF THE DRAWINGS Accompanying drawings are used for providing understanding of technical solutions of the present disclosure, and form a part of the specification. They are used for explaining the technical solutions of the present disclosure together with embodiments of the present disclosure, but do not form a limitation on the technical solutions of the present disclosure. FIG. 1A is a flowchart of UWB ranging in the related art. FIG. 1B is a flowchart of UWB ranging flow in an adaptive hopping mode. FIG. 1C is a flowchart of UWB ranging in a non-