Electronic device for receiving time difference of arrival messages and method for operating the same

Patent metadata

Field	Value
Publication number	US-11855686-B2
Application number	US-202117565617-A
Country	US
Kind code	B2
Filing date	Dec 30, 2021
Priority date	Jun 1, 2021
Publication date	Dec 26, 2023
Grant date	Dec 26, 2023

Abstract

According to certain embodiments, an electronic device comprises: a wireless communication module configured to support ultra-wide band (UWB) communication; and at least one processor operatively connected with the wireless communication module, wherein the at least one processor is configured to: set the wireless communication module to a wake-up state; when a given number of first ranging response messages (RRMs) are received from second external electronic devices after receiving a first ranging initiation message (RIM) from a first external electronic device in a RIM slot of a first ranging round, set the wireless communication module to a sleep state after receiving a first ranging final message (RFM) from the first external electronic device in a RFM slot of the first ranging round until a RIM slot of a second ranging round is reached after the first ranging round; set the wireless communication module to the wake-up state in the RIM slot in the second ranging round; and set the wireless communication module to the sleep state if a second RIM is not received from a third external electronic device in the RIM slot in the second ranging round.

First claim

What is claimed is:

1. An electronic device, comprising:
a wireless communication module configured to support ultra-wide band (UWB) communication; and
at least one processor operatively connected with the wireless communication module, wherein the at least one processor is configured to:
set the wireless communication module to a wake-up state;
when a given number of first ranging response messages (RRMs) are received from second external electronic devices after receiving a first ranging initiation message (RIM) from a first external electronic device in a RIM slot of a first ranging round, set the wireless communication module to a sleep state after receiving a first ranging final message (RFM) from the first external electronic device in a RFM slot of the first ranging round until a RIM slot of a second ranging round is reached after the first ranging round;
set the wireless communication module to the wake-up state in the RIM slot in the second ranging round; and
set the wireless communication module to the sleep state if a second RIM is not received from a third external electronic device in the RIM slot in the second ranging round.

2. The electronic device of claim 1 , wherein when the given number of first RRMS are not received in RRM slots of the first ranging round after receiving the first RIM, the at least one processor is configured to set the wireless communication module to the sleep state after the RRM slots until a time before the RIM slot in the second ranging round.

3. The electronic device of claim 1 , wherein the at least one processor is configured to:
when the second RIM is received in the RIM slot of the second ranging round, determine, through the wireless communication module set to the wake-up state, whether a given number of second RRMs are received in RRM slots in the second ranging round;
set the wireless communication module to the sleep state if the given number of second RRMs are not received in the RRM slots in the second ranging round; and
set the wireless communication module to the wake-up state in a RIM slot of a third ranging round after the second ranging round.

4. The electronic device of claim 3 , wherein the at least one processor is configured to determine, through the wireless communication module, whether a second RFM is received in an RFM slot of the second ranging round while maintaining the wireless communication module in the wake-up state if the given number of second RRMs are received in the RRM slots in the second ranging round.

5. The electronic device of claim 4 , wherein the at least one processor is configured to set the wireless communication module to the sleep state until before the RIM slot of the third ranging round is reached after the second ranging round if the second RFM is received in the RFM slot of the second ranging round.

6. An electronic device, comprising:
a wireless communication module configured to support ultra-wide band (UWB) communication; and
at least one processor operatively connected with the wireless communication module, wherein the at least one processor is configured to:
set the wireless communication module to a wake-up state;
receive, through the wireless communication module, a first ranging initiation message (RIM), at least two first ranging response messages (RRMs) responsive to the first RIM, and a first ranging final message (RFM) in each of a given number of first ranging rounds;
select at least one second ranging round for waking up the wireless communication module based on information for anchor devices that have transmitted the first RIM, the first RRMs, and the first RFM in the first ranging rounds;
set the wireless communication module to a sleep state until before a RIM slot of the selected second ranging round is reached in response to selecting;
set the wireless communication module to the wake-up state in the RIM slot in the selected second ranging round; and
determine, through the wireless communication module, whether a second RIM, at least two second RRMs, and a second RFM are received in the selected second ranging round.

7. The electronic device of claim 6 , wherein the at least one processor is configured to:
identify a number of anchor devices that have transmitted the first RIM, the first RRMs, and the first RFM in each of the first ranging rounds;
select a round index of at least one ranging round having a largest number of the anchor devices from among the first ranging rounds; and
determine the second ranging round having the selected round index in a next ranging block.

8. The electronic device of claim 7 , wherein the at least one processor is configured to:
identify a number of anchor devices that have transmitted the second RIM, the at least two RRMs, and the second RFM in the second ranging round if the second RIM, the at least two RRMs, and the second RFM are successfully received in the second ranging round;
determine whether the identified number has been changed as compared with a previous ranging block; and
determine, through the wireless communication module, whether a third RIM, at least two third RRMs responsive to the third RIM, and a third RFM are received in each of a given number of third ranging rounds if the identified number has been changed as compared with the previous ranging block.

9. The electronic device of claim 6 , wherein the at least one processor is configured to:
select a round index of each of at least one first ranging round in which an anchor center position representing average coordinates of anchor devices that have transmitted the first RIM, the first RRMs, and the first RRM is closer to the electronic device among the first ranging rounds; and
determine the second ranging round having the selected round index in a next ranging block.

10. The electronic device of claim 9 , wherein the at least one processor is configured to:
determine whether a distance between the electronic device and an anchor center position representing average coordinates of anchor devices that have transmitted the second RIM, the at least two second RRMs, and the second RFM in the second ranging round exceeds a threshold if the second RIM, the at least two RRMs, and the second RFM are successfully received in the second ranging round; and
determine, through the wireless communication module, whether a third RIM, at least two third RRMs responsive to the third RIM, and a third RFM are received in each of a given number of third ranging rounds if the distance exceeds the threshold.

11. A method performed by an electronic device including a wireless communication module supporting ultra-wide band (UWB) communication, the method comprising:
setting the wireless communication module to a wake-up state; when a given number of first ranging response messages (RRMs) are received from second external electronic devices after a first ranging initiation message (RIM) from a first external electronic device in a RIM slot of a first ranging round, setting the wireless communication module to a sleep state after receiving a first ranging final message (RFM) from the first external electronic device in a RFM slot of the first ranging round until a RIM slot of a second ranging round is reached after the first ranging round;
setting the wireless communication module to the wake-up state in the RIM slot in the second ranging round; and
setting the wireless communication module to the sleep state if a second RIM is not received from a third external electronic device in the RIM slot in the second ranging round.

12. The method of claim 11 , further comprising when the given number of first RRMs are not received in RRM slots of the first

Assignees

• Samsung Electronics Co Ltd

Inventors

• Yoon Sejong
• Kang Moonseok
• Kim Hyunchul

Classifications

• H04W52/028

  switching on or off only a part of the equipment circuit blocks · CPC title

• H04W52/0254

  detecting a user operation or a tactile contact or a motion of the device · CPC title

• H04W52/0235

  where the received signal is a power saving command · CPC title

• H04W52/0229

  where the received signal is a wanted signal · CPC title

• H04W52/0216

  using a pre-established activity schedule, e.g. traffic indication frame · CPC title