WO2024051515A1

WO2024051515A1 - Communication method and apparatus

Info

Publication number: WO2024051515A1
Application number: PCT/CN2023/115352
Authority: WO
Inventors: 吴宽; 李云波; 钱彬; 杨讯
Original assignee: 华为技术有限公司
Priority date: 2022-09-09
Filing date: 2023-08-28
Publication date: 2024-03-14
Also published as: CN117729506A; TW202412481A

Abstract

The present application provides a communication method and apparatus, which are used for reducing the dependence of a UWB system on a narrowband channel, and improving the reliability and robustness of a UWB ranging system. The method comprises: a first device sending a first segment of a first UWB signal to a second device, and then sending a second segment of the first UWB signal to the second device, wherein the first segment carries a first preamble, and the second segment carries a second preamble, the first preamble and the second preamble being used for triggering a first operation, and the first preamble being different from the second preamble. By means of preamble change indication information, the probability of a second device receiving information can be increased, and thus the reliability and robustness of a UWB system can be improved.

Description

A communication method and device

Cross-references to related applications

This application claims priority to the Chinese patent application filed with the Intellectual Property Office of the People's Republic of China on September 9, 2022, with application number 202211105530.3 and the application title "A communication method and device", the entire content of which is incorporated herein by reference. Applying.

Technical field

The present application relates to the field of communication technology, and in particular, to a communication method and device.

Background technique

Ultra wideband (UWB) technology is a wireless communication (or ranging, sensing, etc.) technology that uses nanosecond-level non-sinusoidal narrow pulse signals. Because its pulses are very narrow and the radiation spectrum density is extremely low, the UWB system has the advantages of strong multipath resolution, low power consumption, and strong confidentiality.

For ranging or sensing scenarios, the accuracy of the measurement or sensing results has a great relationship with the signal bandwidth. The larger the signal bandwidth, the higher the accuracy of the sensing or ranging results. You can consider using the reference for ranging or sensing. Signals are sent and received through the UWB system, and other reference signals and/or data are transmitted through the narrowband channel. This processing method can be understood as UWB ranging or sensing assisted by the narrowband channel. If a narrowband channel is used for communication, listen before talk (LBT) needs to be performed before communication. If the sending device detects that the narrowband channel to be used is occupied by other devices, it will not be able to use the narrowband channel and will back off and wait until the narrowband channel becomes free before it can continue to compete for the use of the narrowband channel.

It can be seen that the operation of the UWB system depends on whether it can compete for narrowband channels, resulting in low reliability and robustness of the UWB ranging system.

Contents of the invention

This application provides a communication method and device to reduce the UWB system's dependence on narrowband channels and improve the reliability and robustness of the UWB ranging system.

In the first aspect, this application provides a communication method. The execution subject of the method may be a first device. The first device may be a ranging initiating device or a ranging responding device, or may be a chip or a circuit. The method includes: a first device sending a first segment of a first UWB signal to a second device, where the first segment carries a first preamble; and the first device sending a second segment of the first UWB signal to the second device. , wherein the second segment carries a second preamble, the first preamble and the second preamble are used to trigger the first operation, and the first preamble and the second preamble are different.

In the embodiment of the present application, the preamble change indication information is used. Compared with sending the information through the NB channel, there is no need to perform LBT, which can increase the probability of the second device receiving the information, thereby improving the reliability and robustness of the UWB system. sex. For example, the second device is instructed to stop sending segments of the UWB signal through the NB channel. If the LBT does not compete for the NB channel, the second device cannot receive the instruction to stop sending in time, causing the second device to continue sending segments of the UWB signal. segment, on the one hand, it causes UWB resources to be occupied, which is wasteful, and on the other hand, it causes the device to consume a lot of power. In the embodiment of the present application, the preamble change is used to trigger the second device to stop sending the segments of the UWB signal, so that the second device can receive the instruction to stop sending in time, and thus can stop sending the segments of the UWB signal in time. Through this method, on the one hand, UWB resources can be released in time to improve the utilization of UWB resources, and on the other hand, the power consumption of the device can be reduced.

In addition, by indicating information in the form of preamble change, the UWB signal can be prevented from carrying data, thereby preventing the UWB signal power from being reduced and the signal reception quality of the second device being reduced.

In a possible design, the first operation includes one or more of the following:

Stop sending the segment of the second UWB signal;

Or, increase the number of segments of the second UWB signal;

Alternatively, send a first instruction to the first device, the first instruction being used to activate the distance measuring wheel;

Or, report the measurement results;

Alternatively, respond to a second instruction from the first device for activating the distance measuring wheel.

In a possible design, when determining that the second device performs the first operation, the first device may send the second segment, that is, change the preamble carried by the segment of the first UWB signal into the second preamble. In this way, the second device is caused to perform the first operation when detecting that the preamble code is changed.

In a possible design, the first device determines that the second device detects the second preamble. Through the above, it can be ensured that the second device can detect the second preamble, so that the information indicated by the second device and the first device remains consistent.

In a possible design, before the first device determines that the second device detects the second preamble, the method further includes: the first device sends at least one segment, and the at least one segment carries the second preamble. The above can ensure that the second device successfully detects the second preamble, thereby improving the reliability and robustness of the UWB system.

In a possible design, after the first device determines that the second device detects the second preamble, the method further includes: the first device stops sending the second preamble.

In a possible design, the first device determines that the second device detects the second preamble carried by the second segment in the following manner: the first device receives the third segment in the second UWB signal, and the third segment carries Third preamble, the third preamble is used to indicate that the second preamble is detected. This method allows the first device to confirm the successful transmission of information through a two-way handshake, thereby improving the robustness of the system.

In a possible design, the first device determines that the second device detects the second preamble carried by the second segment in the following manner: the first device does not receive the fourth segment in the second UWB signal, and the fourth segment The segment is in the same time unit as the second segment. Through the above, the first device can confirm that the transmission of information is successful, thereby improving the robustness of the system.

In a possible design, the first device determines that the second device detects the second preamble carried by the second segment in the following manner: the first device does not receive the fifth segment of the second UWB signal, and the fifth segment The time unit is later than the time unit of the second segment. Through the above, the first device can confirm that the transmission of information is successful, thereby improving the robustness of the system.

In a possible design, after the first device determines that the second device detects the second preamble, the method further includes: the first device performs a first operation. Through the above, the consistency of ranging behaviors of the first device and the second device can be maintained.

In a possible design, the method further includes: the first device receives a sixth segment of the second UWB signal from the second device, and the sixth segment carries the first preamble; the first device receives the sixth segment of the second UWB signal from the second device. The seventh segment of the second UWB signal carries a fourth preamble, and the fourth preamble is different from the first preamble; the first device performs the second operation according to the first preamble and the fourth preamble. Through the above, the behavior of the first device can be made more consistent with communication requirements, thereby improving the accuracy of ranging.

In a possible design, the second operation includes one or more of the following:

Stop sending the segment of the first UWB signal;

Or, increase the number of segments of the first UWB signal;

Alternatively, sending a third instruction to the second device, the third instruction being used to activate the distance measuring wheel;

Or, report the measurement results;

Alternatively, respond to a fourth instruction from the second device for activating the distance measuring wheel.

In a possible design, the method further includes: the first device instructs the first operation through the time unit in which the second segment is located.

In the above method, different information can be indicated by changing the preamble in different time units. This method can reduce signaling overhead through implicit indication.

In a possible design, the method further includes: the first device determines a first operation corresponding to the time unit in which the second segment is located based on the first information; wherein the first information indicates an operation corresponding to at least one time unit, and at least one time unit The unit includes a time unit in which the second segment is located; the first information is determined by the first device, or the first information comes from the second device, or the first information comes from the third device.

In the above method, the first device and the second device pre-arrange the operation corresponding to at least one time unit through the first information, which can improve the flexibility of the instruction.

In a possible design, the method further includes: if the first information is determined by the first device, or the first information comes from a third device, the method further includes: the first device sends the first information to the second device.

In a possible design, the method further includes: the first device determines the first operation based on the second information; wherein the second information indicates: if the preamble carried by the segment of the UWB signal changes, instruct the second device to perform the first operation. Operation: the second information is determined by the first device, or the second information comes from the second device, or the second information comes from the third device.

In the above, the first device and the second device pre-agree on the meaning represented by the preamble change through the second information, which can reduce the complexity of the system.

In a possible design, if the second information is determined by the first device, or the second information comes from a third device, the method further includes: the first device sends the second information to the second device.

In a possible design, the method further includes: the first device determines a first operation based on third information; wherein the third information indicates an operation corresponding to at least one preamble, and the at least one preamble includes a second preamble; the third information Determined for the first device, or the third information comes from the second device, or the third information comes from the third device.

In the above, the first device and the second device pre-agree on the operation corresponding to at least one preamble through the third information, which can improve the flexibility of the indication.

In a possible design, if the third information is determined by the first device, or the third information comes from the third device, the method further includes: the first device sends the third information to the second device.

In a possible design, the third information indicates an operation corresponding to at least one preamble, including: the third information indicates an operation corresponding to at least one cyclic shift length, wherein the second preamble is based on the first preamble and at least A cyclic shift length is determined by a cyclic shift length. The above method can reduce signaling overhead.

In a possible design, the method further includes: the first device determines a first operation based on fourth information; wherein the fourth information indicates at least one operation corresponding to preamble change, and the preamble change includes the preamble before change and the change. The preamble before the change is the first preamble, and the preamble after the change is the second preamble, or the preamble before the change is the second preamble, and the preamble after the change is the first preamble. ; The fourth information is determined by the first device, or the fourth information comes from the second device, or the fourth information comes from the third device.

In the above, the first device and the second device pre-agree on at least one operation corresponding to the preamble change through the fourth information, which can improve the flexibility of the indication.

In a possible design, the preamble before the change is determined based on the first preamble and the first cyclic shift length, and the preamble after the change is determined based on the first preamble and the second cyclic shift length. The above method can reduce signaling overhead.

In a possible design, the time unit in which the second segment is located belongs to at least one detection point, and the at least one detection point is used to change the preamble.

Through the above method, the second device can only detect whether the preamble code changes in part of the time unit (ie, the at least one detection point). Compared with detecting the preamble code change in all time units, this method can reduce the power of the second device. Consumption.

In a possible design, the method further includes: the first device determines at least one detection point based on fifth information, and the fifth information is used to configure the at least one detection point; the fifth information is determined by the first device, or the fifth information from the second device, or, alternatively, the fifth information comes from the third device.

The power consumption of the UWB system can be further reduced by pre-arguing at least one detection point through the fifth information by the first device and the second device.

In a possible design, if the fifth information is determined by the first device, or the fifth information comes from a third device, the method further includes: the first device sends the fifth information to the second device.

In the second aspect, this application provides a communication method. The execution subject of the method may be a second device. The second device may be a ranging initiating device or a ranging responding device, or may be a chip or a circuit. The method includes: the second device receives a first segment of the first UWB signal from the first device, wherein the first segment carries a first preamble; and the second device receives a second segment of the first UWB signal from the first device. segments, wherein the second segment carries a second preamble, and the first preamble and the second preamble are different; and the second device performs the first operation according to the first preamble and the second preamble.

Stop sending the segment of the second UWB signal;

Or, increase the number of segments of the second UWB signal;

Or, report the measurement results;

In a possible design, the method further includes: the second device sends a third segment in the second UWB signal to the first device, the third segment carries a third preamble, and the third preamble is used to indicate that the third UWB signal is detected. Two preambles. This method allows the first device to confirm the successful transmission of information through a two-way handshake, thereby improving the robustness of the system.

In a possible design, the method further includes: starting from the fourth segment in the second UWB signal, the second device stops sending the segment of the second UWB signal, and the fourth segment and the second segment are located at the same time. unit. Through the above, the first device can confirm that the transmission of information is successful, thereby improving the robustness of the system.

In a possible design, the method further includes: starting from the fifth segment of the second UWB signal, the second device stops sending the segments of the second UWB signal, and the time unit of the fifth segment is later than the second segment. The time unit in which the segment is located. Through the above, the first device can confirm that the transmission of information is successful, thereby improving the robustness of the system.

In a possible design, the method further includes: the second device sends a sixth segment of the second UWB signal to the first device, where the sixth segment carries the first preamble; the second device sends the second UWB signal to the first device. The seventh segment of the signal carries a fourth preamble, the fourth preamble and the first preamble are used to trigger the first operation, and the fourth preamble is different from the first preamble. Through the above, the behavior of the first device can be made more consistent with communication requirements, thereby improving the accuracy of ranging.

In a possible design, when determining that the first device performs the second operation, the second device may send the seventh segment, that is, change the preamble carried in the segment of the second UWB signal to the fourth preamble. In this way, the first device performs the second operation when detecting that the preamble code is changed.

Stop sending the segment of the first UWB signal;

Or, increase the number of segments of the first UWB signal;

Or, report the measurement results;

In a possible design, the method further includes: the second device determines the first operation based on the time unit in which the second segment is located. In the above method, different information can be indicated by changing the preamble in different time units. This method can reduce signaling overhead through implicit indication.

In a possible design, the method further includes: the second device determines a first operation corresponding to the time unit in which the second segment is located based on the first information; wherein the first information indicates an operation corresponding to at least one time unit, and at least one time unit The unit includes a time unit in which the second segment is located; the first information is determined by the second device, or the first information comes from the first device, or the first information comes from a third device.

In a possible design, if the first information is determined by the second device, or the first information comes from a third device, the method further includes: the second device sends the first information to the first device.

In a possible design, the method further includes: the second device determines the first operation based on the second information; wherein the second information indicates: if the preamble carried by the segment of the UWB signal changes, instruct the second device to perform the first operation. Operation; the second information is determined by the second device, or the second information comes from the first device, or the second information comes from the third device.

In a possible design, if the second information is determined by the second device, or the second information comes from a third device, the method further includes: the second device sends the second information to the first device.

In a possible design, the method further includes: the first device determines a first operation based on third information; wherein the third information indicates an operation corresponding to at least one preamble, and the at least one preamble includes a second preamble; the third information Determined for the second device, or the third information comes from the first device, or the third information comes from the third device.

In a possible design, if the third information is determined by the second device, or the third information comes from the third device, the method further includes: the second device sends the third information to the first device.

In a possible design, the third information indicates at least one operation corresponding to the preamble, including: the third information indicates at least one An operation corresponding to the cyclic shift length, wherein the second preamble is determined based on the first preamble and one cyclic shift length of at least one cyclic shift length. The above method can reduce signaling overhead.

In a possible design, the method further includes: the second device determines the first operation based on fourth information; wherein the fourth information indicates at least one operation corresponding to the preamble change, and the preamble change includes the preamble before the change and the change. The preamble before the change is the first preamble, and the preamble after the change is the second preamble, or the preamble before the change is the second preamble, and the preamble after the change is the first preamble. ; The fourth information is determined by the second device, or the fourth information comes from the first device, or the fourth information comes from the third device.

In a possible design, the time unit in which the second segment is located belongs to at least one detection point, and the at least one detection point is used to detect whether the preamble is changed.

In a possible design, the method further includes: the second device determines at least one detection point based on fifth information, and the fifth information is used to configure the at least one detection point; the fifth information is determined by the second device, or the fifth information from the first device, or, alternatively, the fifth information is from the third device.

In a possible design, if the fifth information is determined by the second device, or the fifth information comes from the third device, the method further includes: the second device sends the fifth information to the first device.

In a third aspect, this application provides a communication method. The execution subject of the method may be a first device. The first device may be a ranging initiating device or a ranging responding device, or may be a chip or a circuit. The method includes: the first device sends a first segment of the first UWB signal to the second device, where the first segment carries a first preamble, and the first preamble is used to trigger the first operation. The first operation includes one or more of the following: stopping sending segments of the second UWB signal; or increasing the number of segments of the second UWB signal; or sending a first indication to the first device, the first indication being used to start The distance measuring wheel; or, reporting the measurement results; or responding to the second instruction from the first device, and the second instruction is used to start the distance measuring wheel.

In the embodiment of the present application, the information is indicated through the preamble. Compared with sending the information through the NB channel, there is no need to perform LBT, which can increase the probability of the second device receiving the information, thereby improving the reliability and robustness of the UWB system. . For example, the second device is instructed to stop sending segments of the UWB signal through the NB channel. If the LBT does not compete for the NB channel, the second device cannot receive the instruction to stop sending in time, causing the second device to continue sending segments of the UWB signal. segment, on the one hand, it causes UWB resources to be occupied, which is wasteful, and on the other hand, it causes the device to consume a lot of power. In the embodiment of the present application, the preamble is used to trigger the second device to stop sending the segments of the UWB signal, so that the second device can receive the instruction to stop sending in time, and thus can stop sending the segments of the UWB signal in time. Through this method, on the one hand, UWB resources can be released in time to improve the utilization of UWB resources, and on the other hand, the power consumption of the device can be reduced.

Moreover, through the preamble indication information, the UWB signal can be prevented from carrying data, thereby preventing the UWB signal power from being reduced and reducing the signal reception quality of the second device initiator.

In a possible design, the first device may send the first segment when determining that the second device performs the first operation, that is, the first preamble may be carried in the segment of the first UWB signal. In this way, the second device is caused to perform the first operation when detecting the first preamble.

In a possible design, the method further includes: the first device determines that the second device detects the first preamble. The above can ensure that the second device can detect the first preamble, so that the information indicated by the second device and the first device remains consistent.

In a possible design, before the first device determines that the second device detects the first preamble, the method further includes: the first device sends at least one segment, and the at least one segment carries the first preamble. The above can ensure that the second device successfully detects the first preamble, thereby improving the reliability and robustness of the UWB system.

In a possible design, after the first device determines that the second device detects the first preamble, the method further includes: the first device stops sending the first preamble.

In a possible design, the first device determines that the second device detects the first preamble carried by the first segment in the following manner: the first device receives the second segment in the second UWB signal, and the second segment carries The second preamble is used to indicate that the first preamble is detected. This method allows the first device to confirm the successful transmission of information through a two-way handshake, thereby improving the robustness of the system.

In a possible design, the first device determines that the second device detects the first preamble carried by the first segment in the following manner: the first device does not receive the third segment in the second UWB signal, and the third segment The segment is in the same time unit as the first segment. Through the above, the first device can confirm that the transmission of information is successful, thereby improving the robustness of the system.

In a possible design, the first device determines that the second device detects the first preamble carried by the first segment in the following manner: the first device does not receive the fourth segment of the second UWB signal, and the fourth segment The time unit is later than the time unit of the first segment. Through the above, the first device can confirm that the transmission of information is successful, thereby improving the robustness of the system.

In a possible design, the method further includes: the first device receives a fifth segment of the second UWB signal from the second device, and the fifth segment carries a third preamble; the first device performs the third step according to the third preamble. Two operations. Through the above, the behavior of the first device can be made more consistent with communication requirements, thereby improving the accuracy of ranging.

Stop sending the segment of the first UWB signal;

Or, increase the number of segments of the first UWB signal;

Or, report the measurement results;

In a possible design, the method further includes: the first device determines a first operation according to the first information; wherein the first information indicates an operation corresponding to at least one preamble, and the at least one preamble includes the first preamble; the first information Determined for the first device, or the first information comes from the second device, or the first information comes from the third device.

In the above method, the first device and the second device pre-agree on at least one operation corresponding to the preamble through the first information, which can improve the flexibility of the indication.

In a possible design, if the first information is determined by the first device, or the first information comes from a third device, the method further includes: the first device sends the first information to the second device.

In a possible design, the first information indicates an operation corresponding to at least one preamble, including: the first information indicates an operation corresponding to at least one cyclic shift length, wherein the first preamble is based on a preset preamble and At least one of the cyclic shift lengths is determined by one of the cyclic shift lengths. The above method can reduce signaling overhead.

In a possible design, the time unit in which the first segment is located belongs to at least one detection point, and the at least one detection point is used to change the preamble.

In the above manner, the second device can detect a specific preamble (such as the first preamble, the second preamble, etc.) only in part of the time unit (ie, the at least one detection point). Compared with detecting the specific preamble in all time units, code, this method can reduce the power consumption of the second device.

In a possible design, the method further includes: the first device determines at least one detection point based on the second information, and the second information is used to configure the at least one detection point; the second information is determined by the first device, or the second information from a second device, or the second information comes from a third device.

The power consumption of the UWB system can be further reduced by pre-arriving at least one detection point through the second information through the first device and the second device.

In the fourth aspect, this application provides a communication method. The execution subject of the method may be a second device. The second device may be a ranging initiating device or a ranging response device, or may be a chip or a circuit. The method includes: the second device receives a first segment of the first UWB signal from the first device, where the first segment carries a first preamble; and the second device performs a first operation according to the first preamble. The first operation includes one or more of the following: stopping sending segments of the second UWB signal; or increasing the number of segments of the second UWB signal; or sending a first indication to the first device, the first indication being used to start The distance measuring wheel; or, reporting the measurement results; or responding to the second instruction from the first device, and the second instruction is used to start the distance measuring wheel.

In the embodiment of the present application, the information is indicated through the preamble. Compared with sending the information through the NB channel, there is no need to perform LBT, which can increase the probability of the second device receiving the information, thereby improving the reliability and robustness of the UWB system. . For example, the second device is instructed to stop sending segments of the UWB signal through the NB channel. If the LBT does not compete for the NB channel, the second device cannot receive the instruction to stop sending in time, causing the second device to continue sending segments of the UWB signal. segment, on the one hand, it causes UWB resources to be occupied, which is wasteful, and on the other hand, it causes the device to consume a lot of power. In the embodiment of the present application, the preamble is used to trigger the second device to stop sending segments of the UWB signal. This allows the second device to receive the instruction to stop sending in time, so that it can stop sending the segments of the UWB signal in time. Through this method, on the one hand, UWB resources can be released in time to improve the utilization of UWB resources, and on the other hand, the power consumption of the device can be reduced.

In a possible design, the method further includes: the second device sends a second segment in the second UWB signal to the first device, the second segment carries a second preamble, and the second preamble is used to indicate that the second UWB signal is detected. A preamble. This method allows the first device to confirm the successful transmission of information through a two-way handshake, thereby improving the robustness of the system.

In a possible design, the method further includes: starting from the third segment in the second UWB signal, the second device stops sending the segment of the second UWB signal, and the third segment is located at the same time as the first segment. unit. Through the above, the first device can confirm that the transmission of information is successful, thereby improving the robustness of the system.

In a possible design, the method further includes: starting from the fourth segment in the second UWB signal, the second device stops sending the segment of the second UWB signal, and the time unit of the fourth segment is later than the first segment. The time unit in which the segment is located. Through the above, the first device can confirm that the transmission of information is successful, thereby improving the robustness of the system.

In a possible design, the method further includes: the second device sends a fifth segment of the second UWB signal to the first device, the fifth segment carries a third preamble, and the third preamble is used to trigger the second operation. Through the above, the behavior of the first device can be made more consistent with communication requirements, thereby improving the accuracy of ranging.

Stop sending the segment of the first UWB signal;

Or, increase the number of segments of the first UWB signal;

Or, report the measurement results;

In a possible design, the method further includes: the second device determines a first operation based on the first information; wherein the first information indicates an operation corresponding to at least one preamble, and the at least one preamble includes the first preamble; the first information Determined for the second device, or the first information comes from the first device, or the first information comes from the third device.

In a possible design, the first information indicates an operation corresponding to at least one preamble, including: the first information indicates an operation corresponding to at least one cyclic shift length, wherein the first preamble is based on a preset preamble and at least A cyclic shift length is determined by a cyclic shift length. The above method can reduce signaling overhead.

In a possible design, the time unit in which the first segment is located belongs to at least one detection point, and the at least one detection point is used to detect whether the preamble is changed.

In a possible design, the method further includes: the second device determines at least one detection point based on the second information, and the second information is used to configure the at least one detection point; the second information is determined by the second device, or the second information from the first device, or the second information comes from a third device.

In a fifth aspect, a communication device is provided, including a processor and an interface circuit. The interface circuit is used to receive signals from other communication devices other than the communication device and transmit them to the processor or to send signals from the processor. For other communication devices other than the communication device, the processor is used to implement the method in the first aspect or the third aspect as well as any possible design through logic circuits or executing code instructions.

In a sixth aspect, a communication device is provided, including a processor and an interface circuit. The interface circuit is used to receive signals from other communication devices other than the communication device and transmit them to the processor or to send signals from the processor. For other communication devices other than the communication device, the processor is used to implement the method in the aforementioned second aspect or fourth aspect and any possible design through logic circuits or executing code instructions.

In a seventh aspect, a computer-readable storage medium is provided. Computer programs or instructions are stored in the computer-readable storage medium. When the computer program or instructions are executed by a processor, the above-described first to fourth aspects are implemented. method in any aspect and in any possible design.

An eighth aspect provides a computer program product that stores instructions. When the instructions are executed by a processor, any one of the foregoing first to fourth aspects and the method in any possible design are implemented.

In a ninth aspect, a chip system is provided. The chip system includes a processor and may also include a memory for implementing the method in the first aspect or the third aspect and any possible design. The chip system can be composed of chips or include chips and other discrete devices.

In a tenth aspect, a chip system is provided. The chip system includes a processor and may also include a memory for implementing the method in the aforementioned second or fourth aspect and any possible design. The chip system can be composed of chips or include chips and other discrete devices.

An eleventh aspect provides a communication system, which includes the device described in the first aspect (such as a first device), and/or the device described in the second aspect (such as a second device).

A twelfth aspect provides a communication system, which includes the device described in the third aspect (such as a first device), and/or the device described in the fourth aspect (such as a second device).

Description of the drawings

Figure 1 is a schematic structural diagram of a ranging and positioning system according to an embodiment of the present application;

Figure 2 is a schematic diagram of UWB signal segmented transmission according to an embodiment of the present application;

Figure 3 is a schematic structural diagram of a ranging and positioning system according to an embodiment of the present application;

Figure 4 is a schematic diagram of each stage of a UWB distance measuring wheel according to an embodiment of the present application;

Figure 5 is a schematic diagram of a UWB ranging method assisted by a narrowband protocol according to an embodiment of the present application;

Figure 6 is a schematic diagram of a UWB ranging method assisted by a narrowband protocol according to an embodiment of the present application;

Figure 7 is a schematic diagram of a time unit including multiple time slots according to an embodiment of the present application;

Figure 8 is a schematic flow chart of a communication method according to an embodiment of the present application;

Figure 9 is a schematic diagram of a ranging process without using preamble change indication information according to an embodiment of the present application;

Figure 10 is a schematic diagram of preamble change indication information according to an embodiment of the present application;

Figure 11 is a schematic diagram of sending preamble 2 according to an embodiment of the present application;

Figure 12 is a schematic diagram of a ranging response device indicating detection of a second preamble carried in a second segment according to an embodiment of the present application;

Figure 13 is a schematic diagram of a ranging response device indicating detection of a second preamble carried in a second segment according to an embodiment of the present application;

Figure 14 is a schematic diagram of a ranging response device indicating detection of a second preamble carried in a second segment according to an embodiment of the present application;

Figure 15 is a schematic diagram of the behavior of a ranging initiating device according to an embodiment of the present application;

Figure 16 is a schematic diagram of the behavior of a ranging initiating device according to an embodiment of the present application;

Figure 17 is a schematic diagram of indicating the first operation through the time unit where the second segment is located according to an embodiment of the present application;

Figure 18 is a schematic diagram of indicating the first operation through the time unit where the second segment is located according to an embodiment of the present application;

Figure 19 is a schematic diagram of a cell carrying first information according to an embodiment of the present application;

Figure 20 is a schematic diagram of a second information indicating increasing the number of segments according to an embodiment of the present application;

Figure 21 is a schematic diagram of a cell carrying third information according to an embodiment of the present application;

Figure 22 is a schematic diagram of a cell carrying fifth information according to an embodiment of the present application;

Figure 23 is a schematic diagram of the time unit occupied by an increased segmented transmission according to an embodiment of the present application;

Figure 24 is a schematic diagram of a time unit occupied by an increased segmented transmission according to an embodiment of the present application;

Figure 25 is a schematic diagram of a time unit occupied by an increased segmented transmission according to an embodiment of the present application;

Figure 26 is a schematic diagram of an increased time unit occupied by segmented transmission according to an embodiment of the present application;

Figure 27 is a schematic diagram of an increased time unit occupied by segmented transmission according to an embodiment of the present application;

Figure 28 is a schematic diagram of the time unit occupied by an increased segmented transmission according to an embodiment of the present application;

Figure 29 is a schematic diagram of a communication method according to an embodiment of the present application;

Figure 30 is a schematic diagram of a ranging process without indicating information through a preamble according to an embodiment of the present application;

Figure 31 is a schematic diagram of indicating information through a preamble according to an embodiment of the present application;

Figure 32 is a schematic structural diagram of a communication device according to an embodiment of the present application;

Figure 33 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

The embodiments of this application can be applied to wireless personal area network (WPAN) based on Ultra-Wide Band (UWB) technology. The current standard adopted by WPAN is the Institute of Electrical and Electronics Engineers (Institute of Electrical and Electronics Engineers) , IEEE)802.15 series. WPAN can be used for communication between digital auxiliary equipment within a small range such as phones, computers, and accessory equipment. Its working range is generally within 10m. Technologies supporting wireless personal area networks include Bluetooth, ZigBee, ultra-wideband, infrared data association (IrDA) infrared connection technology (infrared), home radio frequency technology (home radio frequency, HomeRF), etc. . Those skilled in the art will readily understand that various aspects involved in this application can be extended to other networks using various standards or protocols. For example, Wireless Local Area Networks (WLAN), High Performance Wireless LAN (HIPERLAN) (a wireless standard similar to the IEEE 802.11 standard, mainly used in Europe) and Wide Area Networks (WAN) or other current A network known or later developed. From the perspective of network composition, WPAN is located at the bottom of the entire network architecture and is used for wireless connections between devices within a small range, that is, point-to-point short-distance connections, which can be regarded as short-distance wireless communication networks. According to different application scenarios, WPAN is divided into high rate (HR)-WPAN and low rate (low rate)-WPAN. Among them, HR-WPAN can be used to support various high-rate multimedia applications, including high-quality sound. Like shipping, multi-megabyte music and image file transfers, etc. LR-WPAN can be used for general business in daily life.

In WPAN, according to the communication capabilities of the device, it can be divided into full-function device (FFD) and reduced-function device (RFD). Communication is possible between FFD devices and between FFD devices and RFD devices. RFD devices cannot communicate directly with each other and can only communicate with FFD devices or forward data through an FFD device. The FFD device associated with the RFD is called the coordinator of the RFD. The coordinator can also control the association of multiple FFDs. Coordinators are also called control nodes. There can be multiple coordinators in each ad hoc network. RFD equipment is mainly used for simple control applications, such as light switches, passive infrared sensors, etc. The amount of data transmitted is small, and it does not occupy much transmission resources and communication resources. The cost of RFD equipment is low. Among them, the coordinator can also be called a personal area network (personal area network, PAN) coordinator. The PAN coordinator can be understood as a type of coordinator. The PAN coordinator is also called the central control node of PAN, etc. FFD can act as a PAN coordinator or coordinator, while RFD cannot act as a PAN coordinator or coordinator. The PAN coordinator is the master control node of the entire network, and there can only be one PAN coordinator in each ad hoc network. It has membership management, link information management, and group forwarding functions. Optionally, the device in the embodiment of this application may be a device that supports multiple WPAN standards such as 802.15.4a, 802.15.4z, and 802.15.4ab or subsequent versions.

In the embodiment of this application, the above-mentioned devices may be communication servers, routers, switches, network bridges, computers or mobile phones, home smart devices, vehicle-mounted communication devices, etc.

In this embodiment of the present application, the above-mentioned device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. This hardware layer includes hardware such as central processing unit (CPU), memory management unit (MMU) and memory (also called main memory). The operating system can be any one or more computer operating systems that implement business processing through processes, such as Linux operating system, Unix operating system, Android operating system, iOS operating system or windows operating system, etc. This application layer includes applications such as browsers, address books, word processing software, and instant messaging software. Moreover, the embodiments of the present application do not specifically limit the specific structure of the execution subject of the method provided by the embodiment of the present application, as long as the program that records the code of the method provided by the embodiment of the present application can be run to provide according to the embodiment of the present application. It suffices to communicate using a method. For example, the execution subject of the method provided by the embodiment of the present application may be FFD or RFD, or a functional module in FFD or RFD that can call a program and execute the program.

Additionally, various aspects or features of the present application may be implemented as methods, apparatus, or articles of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used in this application encompasses a computer program accessible from any computer-readable device, carrier or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (eg, hard disks, floppy disks, tapes, etc.), optical disks (eg, compact disks) disc (CD), digital versatile disc (DVD), etc.), smart cards and flash memory devices (e.g. erasable programmable read-only memory (EPROM)), cards, sticks or key drives wait). Additionally, the various storage media described herein may represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and/or carrying instructions and/or data.

The embodiments of this application can also be applied to wireless local area network systems such as Internet of Things (IoT) networks or Vehicle to X (V2X). Of course, the embodiments of the present application can also be applied to other possible communication systems, such as long term evolution (long term evolution, LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (time division) system duplex (TDD), universal mobile telecommunication system (UMTS), global interoperability for microwave access (WiMAX) communication system, fifth generation (5th generation, 5G) communication system, and future The sixth generation (6G) communication system or new communication systems emerging in future communication development, etc. The above-mentioned communication systems applicable to the present application are only examples. The communication systems applicable to the present application are not limited to these and will be explained uniformly here, and will not be described in detail below.

The above-mentioned communication systems applicable to the present application are only examples. The communication systems applicable to the present application are not limited to these and will be explained uniformly here, and will not be described in detail below.

In addition, "fragment signal (fragment or segment)" in this application may also be called "block signal", "short signal", "partial signal", "segment", "block", "fragment" or "Fragmented signal", etc., there is no limit to the name of the segmented signal. It can be used to identify that a certain UWB signal is split into multiple UWB signals. Each UWB signal in the split multiple UWB signals has a time length. is less than 1 millisecond, and a split UWB signal is sent within each millisecond, as shown in Figure 2. Optionally, the multiple segmented signals obtained by splitting the UWB signal can be the same. For example, the multiple segmented signals obtained by splitting the UWB signal are preambles with the same configuration, where the preambles with the same configuration include but Not limited to: the length of the preamble, the sequence used for the preamble, etc. The preamble is a set of sequences that can be used to identify the device when it interacts with other devices or connects to the network.

It can be seen from the above that splitting the UWB signal to be transmitted into multiple segmented signals for segmented transmission can increase the instantaneous power of the UWB signal, but it cannot increase infinitely. Rule 2 actually limits the power increase factor of UWB segmented transmission.

For example, UWB segmented transmission in this application may also be called multi-millisecond transmission (multi-millesecond, MMS).

1. Impulse Radio Ultra Wideband (IR-UWB) system: Due to the large bandwidth of the ultra-wideband system, its equipment needs to have ultra-high-speed data sending and receiving capabilities, and the spectrum of the IR-UWB system based on pulse transmission The efficiency is low. When transmitting the same information, the IR-UWB scheme requires much higher power consumption than other narrowband short-range protocols (such as Bluetooth or ZigBee).

2. Ranging or sensing: For ranging or sensing scenarios, the accuracy of the measurement or sensing results is related to the signal bandwidth. The larger the signal bandwidth, the higher the accuracy of the sensing or ranging results. Therefore, you can consider sending and receiving reference signals for ranging or sensing through the UWB system, and transmitting other reference signals and/or data through narrowband protocols, which can not only ensure the accuracy of ranging and sensing, but also save power. Consumption. Among them, the perception involved in this application can be understood as the underlying sensing technology of the Internet of Things technology architecture, which is the primary link for the Internet of Things to obtain information and realize object control; ranging can be understood as the measurement of the distance between devices, including but not limited to the Internet of Things Measure the distance between two objects.

For example, the UWB technical solution in this application that combines narrowband-assisted UWB and multi-millisecond transmission can also be called narrow-band assisted multi-millisecond Ultra-wideband (NBA-MMS UWB).

In order to facilitate understanding, the ranging and positioning system used in the above ranging technology is briefly introduced in conjunction with Figure 3. Figure 3 is a schematic architectural diagram of a ranging and positioning system provided by an embodiment of the present application. As shown in Figure 3, the ranging and positioning system includes multiple devices (device 1 and device 2 shown in Figure 3), which can be devices involved in the embodiments of this application, and each device at least includes a UWB module. The devices included in the ranging and positioning system may be devices with communication capabilities in the WPAN (FFD or RFD as shown in Figure 1).

Optionally, the device may also include a narrowband communication module. Among them, either ranging positioning or communication can be performed between the UWB modules of Device 1 (Device 1) and Device 2 (Device 2). If the device contains a narrowband communication module, data can be transmitted between the narrowband communication modules of device 1 and device 2 through a wireless link.

In this application, the UWB module can be understood as a device, chip or system that implements UWB wireless communication technology; accordingly, the narrowband communication module can be understood as a device that implements narrowband communication technology (such as Wi-Fi, Bluetooth, or Zigbee, etc.), Chip or system, etc. In a device (device), the UWB module and the narrowband communication module can be different devices or chips. Of course, the UWB module and the narrowband communication module can also be integrated on one device or chip. The embodiments of the present application do not limit the UWB module and the narrowband communication module. implemented in the device. UWB technology enables communication devices with high data throughput and device positioning with high accuracy.

Among them, the device that initiates the ranging process may be called a ranging initiating device, and the device that performs ranging in collaboration with the ranging initiating device is called a ranging device. A distance response device, for example, device 1 in Figure 3 initiates the ranging process. Device 1 can be called a ranging initiating device, and device 2 that interacts with device 1 to perform ranging can be called a ranging response device. Specifically, the ranging initiating device can send a measurement signal to the ranging response device, and the ranging response device replies a measurement response signal to the ranging initiating device, so that the ranging initiating device determines the distance between the two. For example, the ranging initiating device can be a network device, and the ranging response device can be a terminal device; or the ranging initiating device and the ranging response device can both be terminal devices; or the ranging initiating device and the ranging response device can also be It may be other equipment capable of ranging, etc., which is not limited in this application.

The equipment involved in this application may be a wireless communication chip, a wireless sensor or a wireless communication terminal. For example, user terminals, user devices, access devices, subscriber stations, subscriber units, mobile stations, user agents, and user equipment that support Wi-Fi communication functions. The user terminals may include various handheld devices with wireless communication functions, vehicle-mounted devices, etc. devices, wearable devices, Internet of things (IoT) devices, computing devices or other processing devices connected to wireless modems, as well as various forms of user equipment (UE), mobile stations (MS) ), terminal, terminal equipment, portable communications device, handset, portable computing device, entertainment device, gaming device or system, global positioning system device or any other device configured for network communications via a wireless medium Suitable equipment etc. In addition, the device can support the 802.15.4ab standard or the next generation standard of 802.15.4ab. The device can also support multiple standards such as 802.15.4a, 802.15.4-2011, 802.15.4-2015 and 802.15.4z. The device can also support multiple wireless local area networks (WLAN) standards of the 802.11 family such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, 802.11a, 802.11be next generation.

3. Ranging round: can represent a single ranging process. For example, refer to the definition of distance measuring wheel in the IEEE 802.15.4z standard. The minimum processing time unit of each ranging wheel is the ranging slot. In a ranging wheel, it is divided into three stages: ranging control phase (ranging control phase), ranging phase (ranging phase), and ranging result reporting phase (measurement report phase), as shown in Figure 4, Figure 4 It is a schematic diagram of each stage of a UWB distance measuring wheel. For example, in IEEE 802.15.4z, the ranging control phase contains 1 ranging time slot, and in the IEEE 802.15.4ab standard, the ranging control phase can contain more than 1 ranging time slot. The ranging control phase in this application may include one or more ranging time slots.

It should be noted that the signaling transmission method provided in this application can not only be applied to UWB ranging assisted by narrowband protocols, but also can be applied to UWB sensing or other measurement processes assisted by narrowband protocols. Therefore, in this application The ranging control stage shown in Figure 4 can be understood as a type of measurement control stage, the ranging stage can be understood as a type of measurement stage, and the ranging result reporting stage can be understood as a type of measurement result reporting stage. For example, when the signaling transmission method provided in this application is applied to the UWB sensing process assisted by a narrowband protocol, the measurement control phase can be understood as the sensing control phase, the measurement phase can be understood as the sensing phase, and the measurement result reporting phase can be understood as Sensing result reporting stage.

In addition, it should be noted that the above-mentioned names of different stages in a single measuring wheel are only examples and do not constitute any limitation on the scope of protection of the present application. For example, the above-mentioned measurement control phase can be understood as a phase for configuring the required parameters in the measurement wheel; for another example, the above-mentioned measurement phase can be understood as a phase for performing measurements; for another example, the above-mentioned measurement result reporting phase can be understood as This is the stage for reporting measurement results, and can also be called the end of the measurement stage.

For ease of understanding, a UWB ranging method assisted by a narrowband protocol is briefly introduced below in conjunction with Figure 5. Figure 5 is a schematic diagram of a UWB ranging method. The ranging initiator (initiator) and the ranging response device (responder) can complete the configuration, synchronization and other processes required for UWB NBA-MMS ranging through a narrowband (NB) channel. For example, the ranging initiating device sends a narrowband polling signal (Poll), and the ranging responding device responds with a response signal (Resp) for handshake. Among them, the information carried by the Poll signal includes but is not limited to one or more of the following: parameter configuration related to the ranging wheel, parameter configuration related to the preamble of the ranging signal (preamble length, sequence used for the preamble, etc.), UWB packet types (SP0~SP3), device roles, time slot scheduling allocation, etc.

After receiving the response frame, the ranging initiating device uses segmented transmission on the UWB channel to measure with the ranging response device. After the measurement is completed, the ranging response device sends the measurement results (report) to the ranging initiating device through the NB channel. .

The above describes the applicable scenarios of the embodiments of the present application in conjunction with Figure 1, and briefly introduces the basic concepts involved in the present application, and briefly introduces a UWB ranging method in conjunction with Figure 5. This method has the following problems:

If the NB channel is used for data transmission, listen before talk (LBT) needs to be performed before data transmission. If it is detected that the NB channel to be used is occupied by other devices, the NB channel cannot be used, and the device will back off and wait until the NB channel becomes free before it can continue to compete for the use of the NB channel. Therefore, before the UWB system performs data transmission such as configuration, synchronization, and measurement result reporting required for measurement through the NB channel, it needs to perform LBT on the corresponding NB channel, and only after monitoring that the NB channel is not occupied by other devices, it can pass The NB channel performs corresponding data transmission. For example, as shown in Figure 6, in the ranging control phase, the ranging initiating device performs LBT on the NB channel before sending signal 1 (shown as NB#1 in Figure 6). Signal 1 is used for synchronization, configuration, etc. If it detects that the NB channel is not occupied by other devices, it sends signal 1 through the NB channel. The ranging response device is sending the response signal of signal 1 (Fig. LBT is performed on the NB channel before (shown as NB#2 in 6). If it is detected that the NB channel is not occupied by other devices, the response signal of signal 1 is sent through the NB channel. In the ranging phase, the ranging initiating device sequentially sends each segment of the measurement signal 1 to the ranging response device, and the ranging response device sequentially sends each segment of the measurement signal 2 to the ranging initiating device. In the measurement result reporting stage, the ranging response device performs LBT on the NB channel before sending the measurement result (shown as NB#3 in Figure 6). If it detects that the NB channel is not occupied by other devices, the measurement result will be sent through the NB channel.

It can be seen that the operation of the UWB system depends on whether it can compete for the NB channel, resulting in low reliability and robustness of the UWB system.

For example, when the UWB system performs ranging, in order to increase the transmission power, the ranging initiating device can split the UWB signal into multiple segments for transmission. During the ranging process, the number of segments may change, so the ranging initiating device needs to send a segment number change message through the NB channel. Before the ranging initiating device sends the segment number change message through the NB channel, it needs to perform LBT. If the LBT fails, the segment number change message cannot be sent, causing the ranging response device to be unable to perform ranging based on the changed segment number. , affecting the system efficiency and reducing the reliability and robustness of the UWB system.

Based on this, this application provides a communication method and device, which can reduce the dependence of the UWB system on the NB channel and improve the reliability and robustness of the UWB system by indicating some information through the preamble carried by the segments of the UWB signal. Among them, the method and the device are based on the same concept. Since the principles of the method and the device to solve the problem are similar, the implementation of the device and the method can be referred to each other, and the repeated points will not be repeated.

The embodiments shown below do not specifically limit the specific structure of the execution body of the method provided by the embodiment of the present application, as long as it can be provided according to the embodiment of the present application by running a program that records the code of the method provided by the embodiment of the present application. It suffices to communicate by a method. For example, the execution subject of the method provided by the embodiment of the present application can be a transceiver device, or a functional module in the transceiver device that can call a program and execute the program.

In order to facilitate understanding of the embodiments of the present application, the following points are explained.

First, in this application, "for indicating" may include direct instructions and indirect instructions. When describing certain information to indicate A, it may include that the information directly indicates A or indirectly indicates A, but it does not mean that the information must contain A.

The information indicated by the information is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated. For example, but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the information to be indicated. Index of information, etc. The information to be indicated may also be indirectly indicated by indicating other information, where there is an association relationship between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can also be achieved by means of a pre-agreed (for example, protocol stipulated) arrangement order of each piece of information, thereby reducing the indication overhead to a certain extent. At the same time, the common parts of each piece of information can also be identified and indicated in a unified manner to reduce the instruction overhead caused by indicating the same information individually.

Second, the first, second and various numerical numbers (for example, "#1", "#2", etc.) shown in this application are only for convenience of description and are used to distinguish objects, and are not used to limit this application. Scope of Application Embodiments. For example, distinguish between different segments, etc. It is not used to describe a specific order or sequence. It is to be understood that objects so described are interchangeable where appropriate to enable description of aspects other than the embodiments of the present application.

Third, in this application, "preconfigured" may include predefined, for example, protocol definitions. Among them, "pre-definition" can be realized by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in the device (for example, including each network element). This application does not limit its specific implementation method.

Fourth, in this application, the words "exemplary" or "for example" are used to mean examples, illustrations or explanations. Any embodiment or design described herein as "exemplary" or "such as" is not intended to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the words "exemplary" or "such as" is intended to present the concept in a concrete manner.

Fifth, in the embodiments of this application, “at least one” refers to one or more, and “multiple” refers to two or more. "And/or" describes the association of associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the related objects are in an "or" relationship. "At least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items). For example, at least one of a, b, or c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c can be single or multiple.

Sixth, the "protocol" involved in the embodiments of this application may refer to a standard protocol in the field of communication. For example, it may include the WiFi protocol and related protocols applied in future communication systems. This application does not limit this.

Seventh, the terms "include" and "having" mentioned in the following description of the embodiments of this application, as well as any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that consists of a series of steps or units is not limited to the steps listed. steps or units, but optionally also includes other steps or units not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

The communication method provided by the embodiments of this application can be applied to scenarios such as ranging, positioning, and sensing, such as factory personnel positioning, cargo positioning in logistics and warehousing, intelligent sensing of car door locks, and so on.

The network architecture and business scenarios described in the embodiments of this application are for the purpose of explaining the technical solutions of the embodiments of this application more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. Those of ordinary skill in the art will know that with the network With the evolution of architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

It should be noted that in this embodiment of the present application, the first device may be a ranging initiating device, and the second device may be a ranging responding device. Alternatively, the first device may be a ranging response device, and the second device may be a ranging initiating device. There are no specific limitations in this application.

If the first device is a ranging initiating device, the first measurement signal sent by the first device may be a measurement signal, and the second measurement signal sent by the second device may be a measurement response signal. If the first device is a ranging response device, the second measurement signal sent by the second device may be a measurement signal, and the first measurement signal sent by the first device may be a measurement response signal.

For example, "UWB signal" in the embodiment of this application can also be described as "measurement signal frame", "ranging signal", "ranging signal frame", "measurement transmission frame", "ranging transmission frame", " UWB transmission frame", "UWB ranging signal", etc.

In order to facilitate the understanding of the solution, the following description takes the ranging initiating device as an example to indicate information to the ranging response device through the preamble carried by the segmentation of the UWB signal. That is, the first device is the ranging initiating device, and the second device For ranging response equipment. It should be understood that if the ranging response device indicates information to the ranging initiating device through the preamble carried by the segment of the UWB signal, that is, the first device is the ranging response device and the second device is the ranging initiating device. For details, please refer to The process of the ranging initiating device indicating information to the ranging response device through the preamble carried by the segments of the UWB signal will not be described again.

It should be noted that in the following description, only the ranging initiating device and the ranging response device are used as execution subjects. Optionally, the operation of the ranging initiating device can also be performed by a processor, a chip or a functional module in the ranging initiating device; the operation of the ranging response device can also be performed by a processor, a chip or a functional module in the ranging response device. Function module execution, this application does not limit this.

In an exemplary explanation, the segments of the UWB signal in this application may be signals containing only preambles (preamble-only packets).

In the embodiment of the present application, the time unit may include a ranging time slot (which can also be understood as a ranging opportunity), that is, the time interval between two adjacent segments of the same UWB signal is one ranging time slot. . Assuming that the time unit is 1ms, the time interval between two adjacent segments of the same UWB signal is 1ms.

Alternatively, the time unit may also include multiple ranging time slots (which can also be understood as multiple ranging opportunities). For one ranging time slot, its time duration is less than 1 ms. For example, as shown in Figure 7. In this case, the time granularity of system scheduling needs to be smaller. The description of the preamble change/preamble delivery instruction information in this application is still applicable, but in actual system implementation, a more fine-grained scheduling instruction method needs to be considered, and this application will not go into details.

Refer to Figure 8, which is a schematic flow chart of a communication method provided by this application. The method includes:

S801: The ranging initiating device sends the first segment of the first UWB signal to the ranging response device. Correspondingly, the ranging response device receives the first segment of the first UWB signal from the ranging initiating device.

Wherein, the first segment carries the first preamble. Optionally, the above-mentioned first preamble may be a preamble configured in the measurement control stage.

In an exemplary description, the first UWB signal may be a UWB signal sent by the ranging initiating device to the ranging response device, and the second UWB signal below may be a UWB signal sent by the ranging response device to the ranging initiating device.

S802: The ranging initiating device sends the second segment of the first UWB signal to the ranging response device. Correspondingly, the ranging response device receives the second segment of the first UWB signal from the ranging initiating device.

The second segment carries a second preamble, and the first preamble and the second preamble are different.

The first preamble and the second preamble are used to trigger the first operation. Specifically, the first operation is triggered by changing the first preamble to the second preamble. In this way, information can be indicated through UWB signals, thereby reducing the dependence of the UWB system on the NB signal and improving the reliability and robustness of the UWB system.

Exemplarily, the first operation may be to stop sending segments of the UWB signal, that is, the first preamble and the second preamble are used to instruct (or trigger) the ranging response device to stop sending segments of the second UWB signal.

Alternatively, the first operation may also be to increase the number of segments of the UWB signal, that is, the first preamble and the second preamble are used to instruct (or trigger) the ranging response device to increase the number of segments of the second UWB signal.

Alternatively, the first operation may also be to send a first instruction, and the first instruction is used to start the distance measuring wheel. That is, the first preamble and the second preamble are used to instruct (or trigger) the ranging response device to send the first instruction to the ranging initiating device.

Alternatively, the first operation may also be to report the measurement results. That is, the first preamble and the second preamble are used to instruct (or trigger) the ranging response device to report the measurement result of the first UWB signal.

Alternatively, the first operation may also be a response to a second instruction for activating the distance measuring wheel. That is, the first preamble and the second preamble are used to instruct (or trigger) the ranging response device to respond to the second instruction from the ranging initiating device.

Alternatively, the first operation may also include any of the following operations: stopping sending segments of the second UWB signal; increasing the number of segments of the second UWB signal; sending a first indication to the first device, the first indication using to start the distance measuring wheel; to report the measurement results; or to respond to a second instruction from the first device, the second instruction being used to start the distance measuring wheel. For example, the first operation is to stop sending segments of the second UWB signal and send the first indication to the first device. For another example, the first operation is to increase the number of segments of the second UWB signal and report the measurement results.

It should be understood that the above-mentioned first operations are only some examples. In specific implementations, the first preamble and the second preamble may also indicate other operations or other information, which are not specifically limited here. The specific manner in which the ranging initiating device and the ranging response device determine the first operation will be described in detail below.

S803: The ranging response device performs the first operation according to the first preamble and the second preamble.

In the embodiment of the present application, the preamble change indication information is used. Compared with sending the information through the NB channel, there is no need to perform LBT, which can increase the probability that the opposite end device (that is, the ranging response device) receives the information, thereby improving the probability of receiving the information. Reliability and robustness of UWB systems. For example, if the peer device is instructed to stop sending UWB signal segments through the NB channel, if the LBT does not compete for the NB channel, the peer device cannot receive the instruction to stop sending in time, causing the peer device to continue sending segments of the UWB signal. segment, on the one hand, it causes UWB resources to be occupied, which is wasteful, and on the other hand, it causes the device to consume a lot of power. In the embodiment of the present application, the preamble code is changed to trigger the opposite end device to stop sending the segments of the UWB signal, so that the opposite end device can receive the instruction to stop sending in time, and thus can stop sending the segments of the UWB signal in time. Through this method, on the one hand, UWB resources can be released in time and the utilization rate of UWB resources can be improved. On the other hand, the power consumption of the device can be reduced, and the interference to other devices can also be reduced.

In addition, by indicating information by changing the preamble, the UWB signal can be prevented from carrying data, thereby avoiding the reduction of UWB signal power and the degradation of the signal reception quality of the initiator of the opposite end device (that is, the ranging response device).

In a possible implementation, the ranging initiating device may change the preamble carried in the segment of the first UWB signal to the second preamble when determining that the ranging response device performs the first operation. In this manner, the ranging response device triggers the ranging response device to perform the first operation when detecting a change in the preamble.

In a specific example, it is assumed that the ranging initiating device and the ranging response device are configured to interact with 8 segments in the measurement control phase, and the segments are configured to carry preamble 1, for example, through the polling signal and response signal in the ranging control phase. Configure the number of segments to 8 and the preamble to 1. The ranging initiating device and the ranging response device send each segment in sequence, and each segment carries preamble 1.

It should be noted that this application only takes the example of configuring the ranging initiating device and the ranging response device to carry the same preamble (i.e., preamble 1) in the ranging control phase as an example. In a specific implementation, it may also be configured The segments of the ranging initiating device and the ranging responding device carry different preambles, which are not specifically limited here.

Without using preamble change indication information, the ranging process can be as shown in Figure 9.

Taking the segment where the first operation is to stop sending UWB signals as an example, if the ranging initiating device receives segment 2 of UWB signal 2 sent by the ranging response device, it determines the accumulated signal strength of the received segments ( For example, SNR value), the ranging initiating device can carry preamble 2 in segment 3 of UWB signal 1, as shown in Figure 10.

It should be noted that in Figures 9 and 10, as well as the subsequent Figures 11 to 28, the segment sent in time unit 0 is segment 0, the segment sent in time unit 1 is segment 1, and so on. , the segment sent in time unit 7 is segment 7 as an example for explanation. This application does not limit the relationship between the serial number of the time unit and the segment serial number.

Optionally, in order to ensure that the ranging response device successfully detects the second preamble, the ranging initiating device may carry the second preamble in one or more segments sent after determining that the ranging response device performs the first operation. For example, with reference to the above example shown in Figure 10, the ranging initiating device can carry preamble 2 in segment 3 of UWB signal 1 and subsequent segments, as shown in Figure 11.

The ranging initiating device may stop sending the second preamble after determining that the ranging response device detects the second preamble, or when a preconfigured maximum number of segments of the first UWB signal is reached.

It should be noted that in this application, "sending the second preamble" can be understood as sending the segment carrying the second preamble, and "stopping sending the second preamble" can be understood as stopping sending the segment carrying the second preamble.

The following describes three ways for the ranging initiating device to determine that the ranging response device has detected the second preamble carried in the second segment.

Method 1: The ranging initiating device receives the third segment in the second UWB signal. The third segment carries the third preamble. The third preamble Used to indicate that the second preamble is detected. For example, based on the example shown in Figure 10 above, after detecting the preamble 2 carried in segment 3 of UWB signal 1, the ranging response device can carry a preamble different from preamble 1 in segment 3 of UWB signal 2. code (preamble code 3 is taken as an example in Figure 12), as shown in Figure 12.

The third preamble code is different from the first preamble code. The third preamble code and the second preamble code may be the same or different, and are not specifically limited here.

This method can make the ranging initiating device confirm the transmission of information successfully through a two-way handshake, thereby improving the robustness of the system. Wherein, the ranging initiating device sends a second preamble to the ranging response device through the second segment, and the ranging response device sends a third preamble to the ranging initiating device through the third segment, so that the ranging initiating device determines the measurement Until the responding device detects the second preamble, this process can be called a two-way handshake process.

Method 2: The ranging initiating device does not receive the fourth segment in the second UWB signal, and the fourth segment and the second segment are located in the same time unit. For example, with reference to the above example shown in Figure 10, after detecting segment 3 of UWB signal 1, the ranging response device may no longer send segment 3 of UWB signal 2 and subsequent segments. As shown in Figure 13.

Optionally, this second method can be applied in scenarios where the ranging response device has relatively strong processing capabilities and can complete the segmentation before the second segment before sending the fourth segment. Segment signal merging. The ranging response device may stop sending the segment of the second UWB signal after detecting the second preamble in the second segment.

Method 3: The ranging initiating device does not receive the fifth segment of the second UWB signal, and the time unit of the fifth segment is later than the time unit of the second segment.

Optionally, method three can be applied in scenarios where the processing capability of the ranging response device is relatively weak and the processing capability of the ranging response device is relatively weak and cannot complete the segmentation before the second segment before sending the fourth segment. Segment signal merging. After detecting the second preamble in the second segment, the ranging response device may start the next time unit of the time unit where the second segment is located or one or more intervals after the time unit where the second segment is located. The time unit starts to stop the segment in which the second UWB signal is not sent. For example, taking the segment that stops sending the second UWB signal in the next time unit of the time unit where the second segment is located as an example, combined with the example shown in Figure 10 above, the ranging response device detects UWB signal 1 After segment 3, segment 4 and subsequent segments of UWB signal 2 may no longer be sent, as shown in Figure 14.

The above describes the solution in which the ranging initiating device instructs the ranging response device to perform the first operation through the preamble of the UWB signal. The following is the behavior of the ranging initiating device after instructing the ranging response device to perform the first operation.

In a possible example, the ranging initiating device may also perform the first operation after determining that the ranging response device detects the second preamble.

For example, if the first operation is to stop sending segments of the UWB signal, the ranging initiating device may stop sending segments of the first UWB signal after determining that the ranging response device detects the second preamble. For example, with reference to the example shown in FIG. 12 above, the ranging initiating device may stop sending segment 4 and subsequent segments of the UWB signal, as shown in FIG. 15 .

For another example, if the first operation is to increase the number of segments of the UWB signal, then the ranging initiating device may increase the number of segments of the first UWB signal after determining that the ranging response device detects the second preamble.

This example can be used in a scenario where the respective receiver noise levels of the ranging initiating device and the ranging response device are the same or close. In this scenario, the ranging initiating device accumulates based on the currently accumulated received segments of the second UWB signal. The received signal quality (such as signal-noise ratio (SNR) value), and the received signal quality (such as SNR value) accumulated by the ranging response device based on the currently accumulated received segments of the first UWB signal ), the same or the difference is small. Therefore, when the ranging initiating device instructs the ranging response device to perform the first operation, the ranging initiating device can also perform the first operation, so that the consistency of ranging behaviors of the ranging initiating device and the ranging response device can be maintained.

In another possible example, the ranging initiating device can also perform other operations under the instruction of the ranging response device. For example, the ranging response device can instruct the ranging initiating device to perform the second operation through A to A3 as follows:

A1: The ranging response device sends the sixth segment of the second UWB signal to the ranging initiating device, and the sixth segment carries the first preamble.

A2: The ranging response device sends the seventh segment of the second UWB signal to the ranging initiating device. The seventh segment carries the fourth preamble, and the fourth preamble is different from the first preamble.

A3: The ranging initiating device performs the second operation based on the first preamble and the fourth preamble.

The process in which the ranging response device instructs the ranging initiating device to perform the second operation is similar to the process in which the ranging initiating device instructs the ranging response device to perform the first operation. For details, please refer to the relevant descriptions above.

For the second operation, please refer to the relevant description of the first operation, and the description will not be repeated here. It should be noted that the second operation and the first operation They can be the same or different, and there are no specific limitations here.

Taking the segment where the second operation is to stop sending UWB signals as an example, combined with the example shown in Figure 13, the ranging initiating device instructs the ranging response device to stop sending UWB signal 2 through the preamble change of segment 3 of UWB signal 1. After segmentation. Since the noise level of the ranging response device is significantly different from that of the ranging initiating device, the ranging response device still needs to receive more segments of UWB signal 1 for signal merging. Therefore, the ranging initiating device continues to send segments of UWB signal 1 to the ranging responding device. Optionally, the segment sent after segment 3 of UWB signal 1 may carry preamble 1.

If the ranging response device determines the accumulated signal strength (such as SNR value) of the received segments when receiving segment 5 of UWB signal 1 sent by the ranging sending device, the ranging response device can send segments of the UWB signal. Segment 5 and carries a preamble different from preamble 1 in this segment (preamble 2 is taken as an example in Figure 16). After the ranging initiating device detects preamble 2 carried in segment 5 of UWB signal 2 , stop sending segment 6 of UWB signal 1 and subsequent segments. As shown in Figure 16. It should be understood that if the ranging initiating device indicates to the ranging response device that it has detected the preamble 2 carried in segment 5 of the UWB signal 2 by using the two-way handshake method described in the above method 1, the ranging initiating device can send the UWB signal. Segment 6 of 1, and carry preamble 3 in this segment, and stop sending segment 7 of UWB signal 1 and subsequent segments.

The above describes the process of the ranging initiating device instructing the ranging response device to perform the first operation. The following describes the process of the ranging initiating device and the ranging response device determining the first operation.

In a possible manner, the ranging initiating device indicates the first operation through the time unit in which the second segment is located. Correspondingly, the ranging response device may determine the first operation according to the time unit in which the second segment is located.

For example, with reference to the example shown in FIG. 10 above, it is assumed that time unit 4 is used to instruct to stop sending the segments of the UWB signal, and time unit 7 is used to instruct to increase the number of segments of the UWB signal.

Based on this, if the ranging initiating device wants to instruct the ranging response device to stop sending segments of the UWB signal, the ranging initiating device can send the second segment in time slot 4. In other words, the ranging initiating device can send the second segment in the time unit 4. Change the preamble carried by the segment of the first UWB signal to preamble 2. Correspondingly, the ranging response device detects that the preamble code changes in time unit 4, and stops sending the segments of UWB signal 2, as shown in Figure 17.

If the ranging initiating device wants to instruct the ranging response device to add a segment of the UWB signal, the ranging initiating device can send the second segment in time unit 7. In other words, the ranging initiating device can send the first segment in time unit 7. The preamble carried by the segments of the UWB signal is changed to preamble 2. Correspondingly, assuming that the increased number is preconfigured to be 3 segments, and the ranging response device detects that a preamble code change occurs in time unit 7, it increases the segments of UWB signal 2 by 3 segments. As shown in Figure 18.

Optionally, each operation can correspond to one or more time units, which are not specifically limited here.

The location of the time unit corresponding to each operation can be preconfigured.

Alternatively, the operation corresponding to the time unit in which the second segment is located may also be determined by the ranging initiating device and the ranging response device based on the first information. The first information indicates the operation corresponding to at least one time unit, and the at least one time unit includes the third time unit. The time unit where the second segment is located.

The first information may be pre-agreed by the ranging initiating device and the ranging responding device. For example, the ranging initiating device sends the first information to the ranging response device, where the ranging initiating device can determine the first information in the following manner: generated by itself or received from a third device. For another example, the ranging response device sends the first information to the ranging initiating device, where the ranging response device can determine the first information in the following manner: generated by itself or received from a third device. Optionally, the first information is exchanged through the NB channel, for example, it can be carried in the polling signal.

Alternatively, the first information may be obtained by the ranging initiating device and the ranging response device from the third device.

For example, the first information may be as shown in Table 1.

Table 1

It should be understood that Table 1 is only an exemplary description, and this application does not limit the number of time units corresponding to each operation. Furthermore, this application is not limited to instructing the operations listed in Table 1. The first information may also instruct operations other than those listed in Table 1, or the first information may only instruct some operations in Table 1, or it may also be predefined. Part/all of table 1 combined with operations outside of predefined table 1, etc. Among them, the meaning of starting a distance measuring wheel includes but is not limited to: starting a new distance measuring wheel that is adjacent or not adjacent in time, the current round of measurement reporting stage is directly used to start a new distance measuring wheel, etc. This application is The time period for starting the measuring wheel is not specifically limited.

In a specific example, the first information may be carried in the cell in the form of a list, as shown in Figure 19. The time unit list length field is used to indicate the length of the time unit list. Specifically, it may indicate the number of time units configured in the first information. The time unit list field is used to indicate the operations corresponding to each time unit. Specifically, the time unit list field may include a time unit index subfield and an operation index subfield. The time unit index subfield includes one or more time units, and the operation index subfield includes operations corresponding to the time units.

In another possible manner, the ranging initiating device and the ranging response device determine the first operation based on the second information. Wherein, the second information indicates: if the preamble carried by the segment of the UWB signal is changed, the ranging response device is instructed to perform the first operation.

For the manner in which the ranging initiating device and the ranging response device obtain the second information, please refer to the manner in which the ranging initiating device and the ranging response device obtain the first information, which will not be described again here.

In a specific implementation of this method, the field values corresponding to each operation can be predefined, so that the second information can indicate the corresponding operation through specific values. For example, the field values corresponding to each operation can be as shown in Table 2.

Table 2

It should be understood that Table 2 is only an illustrative description, and this application does not limit the values corresponding to each operation. Moreover, this application is not limited to predefining the operations listed in Table 2. It can also predefine operations other than Table 2, or it can also predefine only some of the operations in Table 2, or it can also predefine the operations of Table 2. Some/all combinations of operations outside of predefined table 2, etc.

Optionally, for the method for the ranging initiating device and the ranging response device to obtain the values corresponding to each operation, please refer to the method for the ranging initiating device and the ranging response device to obtain the first information, which will not be repeated here.

For example, assuming that the second information is 1, according to the records in Table 2, the preamble change indicates that the number of segments of the UWB signal is doubled. It is assumed that the ranging initiating device and the ranging responding device have pre-arranged that both parties will interact with two segments for ranging. Among them, both the ranging initiating device and the ranging response device use the same preamble sequence (assumed to be preamble 1). The ranging initiating device instructs the ranging response device to double the number of segments of the UWB signal 2 by changing the preamble in time unit 1, that is, 4 segments. When the ranging initiating device determines that the number of segments needs to be further increased in time unit 3, it instructs the ranging response device to double the number of segments of UWB signal 2 by changing the preamble in time unit 3. That is 8 segments. In this example, the specific change method of the preamble is not distinguished (preamble 1 becomes preamble 2, or preamble 2 changes back to preamble 1). As long as the preamble is changed, the operation indicated by the second information is performed. . Taking the preamble changing mode as preamble 1 to preamble 2 as an example, the process can be shown in Figure 20.

In yet another possible manner, the ranging initiating device and the ranging response device determine the first operation based on the third information. The third information indicates an operation corresponding to at least one preamble, and the at least one preamble includes a second preamble.

For the manner in which the ranging initiating device and the ranging response device obtain the third information, please refer to the manner in which the ranging initiating device and the ranging response device obtain the first information, which will not be described again here.

For example, the third information may be as shown in Table 3.

table 3

It should be understood that Table 3 is only an exemplary description, and this application does not limit the operations corresponding to each preamble index. Moreover, this application is not limited to instructing the operations listed in Table 3. The third information can also instruct operations other than those listed in Table 3. Alternatively, the third information can also instruct only some of the operations in Table 3. Alternatively, the third information can also instruct some operations listed in Table 3. Instructs some/all of the operations in Table 3 combined with operations outside of Table 3, and so on.

In a specific example, the third information may be carried in the cell in the form of a list, as shown in Figure 21. The preamble list length field is used to indicate the length of the preamble list, and specifically may indicate the number of preambles configured in the third information. The preamble list field is used to indicate the operation corresponding to each preamble. Specifically, the preamble list field may include a preamble index subfield and an operation index subfield. The preamble index subfield includes one or more preambles, and the operation index subfield includes operations corresponding to the preambles.

For example, assume that the ranging initiating device and the ranging response device have agreed in advance that each of them will interact with 8 segments for ranging. If the ranging initiating device does not need to indicate information to the ranging response device, the preamble with index 0 can be carried in the segment. If the ranging initiating device instructs the ranging response device to stop sending a segment of the UWB signal, the preamble with index 1 may be carried in the segment. The ranging response device stops sending segments of UWB signal 2 after detecting the preamble with index 1.

If the ranging initiating device instructs the ranging response device to double the number of segments of the UWB signal, the preamble with index 2 can be carried in the segments. The ranging response device doubles the number of segments of UWB signal 2 after detecting the preamble with index 2, that is, 16 segments.

In a possible implementation, different preambles can be generated based on the same sequence with different cyclic shift lengths. Therefore, the third information can represent the corresponding preamble through different cyclic shift lengths.

Among them, the cyclic shift length can be a numerical value.

Example 1 of circular shift: Assume that the sequence is {1,0,-1,1,-1}, the shift length is 2, and moving to the right side of the sequence, the sequence generated after the circular shift is {1,-1 ,1,0,-1}. In other words, the first to third elements of the original sequence from left to right, 1,0,-1, now become the third to fifth elements of the newly generated sequence. The fourth to fifth elements of the original sequence, 1 and -1, now become the first to second elements of the newly generated sequence.

Example 2 of circular shift: Assume that the sequence is {0,1,0,-1,1}, the shift length is 3, and moving to the left of the sequence, the sequence generated after circular shift is {0,-1, 1,0,1}. In other words, the third to fifth elements of the original sequence from left to right, 0, -1, and 1, now become the first to third elements of the newly generated sequence. The first to second elements of the original sequence, 0 and 1, now become the fourth to fifth elements of the newly generated sequence.

For example, the third information may also be as shown in Table 4.

Table 4

Based on the example of Table 4, the second preamble may be determined according to the first preamble and one cyclic shift length of at least one cyclic shift length.

Similarly, if the cyclic displacement length is used to represent the preamble, the preamble index subfield in Figure 21 can be replaced with a cyclic displacement length subfield, and the cyclic displacement length subfield includes one or more cyclic displacement lengths.

In some embodiments, the third information can also be presented using a combination of Table 3 and Table 4. For example, some preambles use a cyclic displacement length to represent the preamble, and other preambles use a preamble index to represent the preamble. This application does not provide details. limited.

In another possible manner, the ranging initiating device and the ranging response device determine the first operation according to the fourth information. The fourth information indicates at least one operation corresponding to the preamble change. The preamble change includes a preamble before the change and a preamble after the change. The preamble before the change is the first preamble, and the preamble after the change is the third preamble. The second preamble code, or the preamble code before the change is the second preamble code, and the preamble code after the change is the first preamble code.

For the manner in which the ranging initiating device and the ranging response device obtain the fourth information, please refer to the manner in which the ranging initiating device and the ranging response device obtain the first information, which will not be described again here.

The expression method and transmission method of the fourth information are similar to the expression method and transmission method of the third information, and will not be explained here.

In a possible embodiment, at least one detection point can be predefined, and the at least one detection point is used to initiate the preamble change, wherein a detection point can be a time unit, or one or more times included in a time period. time unit. Based on this, the ranging initiating device can initiate the preamble change at any detection point. For example, the above-mentioned second segment can be sent at one of the detection points. Correspondingly, the ranging response device may detect the preamble change only for the above-mentioned at least one detection point. Through the above method, the ranging response device can only detect whether the preamble code changes in part of the time unit. Compared with detecting the preamble code change in all time units, this method can reduce the power consumption of the ranging response device.

Optionally, in the above embodiment, the ranging initiating device and the ranging response device determine the at least one detection point based on the fifth information. The fifth information is used to configure the above-mentioned at least one detection point.

For the manner in which the ranging initiating device and the ranging response device obtain the fifth information, please refer to the manner in which the ranging initiating device and the ranging response device obtain the first information, which will not be described again here.

For example, it is assumed that the ranging initiating device and the ranging response device have agreed in advance that each of them will interact with 16 segments for ranging. In order to reduce the additional overhead such as the reception complexity of the ranging response device, the ranging initiating device and the ranging response device can pre-agree that only in time unit 0, time unit 1, time unit 3, time unit 7, and time unit 15 Detect whether the preamble has changed.

In a specific example, the fifth information may be carried in the cell in the form of a list, as shown in Figure 22. The detection point list length field is used to indicate the length of the detection point list. Specifically, it may indicate the number of detection points configured in the fifth information. The detection point list field is used to indicate individual detection points. Specifically, the detection point list field may include a detection point index subfield and a time unit index subfield. The detection point index subfield includes the index of one or more detection points, and the time unit index subfield includes the time unit corresponding to the detection point.

In addition, the ranging initiating device and the ranging response device involved in the embodiments of this application may interact one-to-one, that is, a ranging initiating device and a ranging response device interact. Alternatively, it can also be one-to-many interaction, that is, one ranging initiating device interacts with multiple ranging response devices; or it can also be many-to-one interaction, that is, multiple ranging initiating devices and one ranging response device Interaction; or, it can also be many-to-many interaction, that is, multiple ranging initiating devices and multiple ranging response devices interact. This application only describes the interaction between a ranging initiating device and a ranging responding device. In other scenarios, you can also refer to the method described in this application, and will not be explained one by one here.

In addition to sending the first information/second information/third information/fourth information/fifth information through the NB channel as mentioned above, the aforementioned first information/second information/third information/fourth information/fifth information is carried The information elements can be one or more of the following frames: data frame, beacon frame, enhanced beacon frame, acknowledgment frame (ack frame), MAC command frame ( MAC command frame), multipurpose frame (Multipurpose frame), extended frame (extended frame) and other bearer forms. This application does not place any restrictions on the bearer form of the cell.

The cells carrying the aforementioned first information/second information/third information/fourth information/fifth information can be used in the ranging control phase, or can also be used in device discovery, connection establishment, etc. earlier than ranging control. It can be used in the time phase of the phase, or it can also be used in the ranging management phase in the beacon frame interval period, etc. This application does not make any limitation on the phase in which the cell is used.

In the solution described above, if the first operation is to increase the number of segments of the UWB signal, the ranging response device may need to consider the time unit occupied by the transmission of the increased segments when increasing the number of segments of the second UWB signal. . Five examples of increased time units occupied by segmented transmissions are described below.

Example 1: The time unit in the measurement reporting phase of this distance measuring wheel can be used to transmit the added segments. That is, the time unit occupied by the transmission of the added segments can be the time unit in the measurement reporting phase, as shown in the figure. 23 shown.

Example 2: If there are remaining time units after sending the original segments of the second UWB signal during the measurement phase of this distance measuring wheel, the remaining time units can also be used to transmit the additional segments, that is, to increase the The time unit occupied by the segmented transmission may be the remaining time unit in the measurement phase, as shown in Figure 24.

Example 3: The time unit in the next distance measurement wheel of this distance measurement wheel can also be used to transmit the increased segments. That is, the time unit occupied by the transmission of the additional segments can be the time unit in the next distance measurement wheel. time unit. Assuming that this distance measuring wheel is distance measuring wheel 0, the time unit where the added segment is located can be the time unit in distance measuring wheel 1, as shown in Figure 25.

Example 4: The time unit in a distance measuring wheel after the current measurement wheel in this cycle can also be used to transmit the added segments. The distance measurement wheel may not be adjacent to the current distance measurement wheel. That is to say, the time unit occupied by the increased segment transmission can be the time unit in a distance measuring wheel later than this distance measuring wheel. Assume that this cycle is cycle 0, and this distance measuring wheel is distance measuring wheel 0 in cycle 0, then the time unit of the added segment can be the time unit of distance measuring wheel 3 in cycle 0, as shown in Figure 26 . Among them, the cycle can also be called a block.

Example 5: The time unit in any distance measuring wheel in the period after this period can also be used to transmit the added segments. That is to say, the time unit occupied by the increased segment transmission can be the time unit in any ranging wheel in the cycle after this cycle. This application does not limit the number of cycles between two cycles.

Among them, the distance measuring wheel can have the same serial number as the current distance measuring wheel, that is, the time unit occupied by the increased segment transmission can be the distance measuring wheel with the same serial number as the current measuring wheel in the period after this cycle. time unit in . Assume that this cycle is cycle 0, and this distance measuring wheel is distance measuring wheel 0 in cycle 0, then the time unit of the added segment can be the time unit of distance measuring wheel 0 in cycle 2, as shown in Figure 27 . This application does not limit the number of cycles between two cycles.

Alternatively, the sequence numbers of the distance measuring wheel and the current distance measuring wheel may also be inconsistent. That is, the time unit occupied by the increased segment transmission may be the ranging sequence number in the period after this cycle that is different from the current measurement wheel. The time unit in the round. Assume that this cycle is cycle 0, and this distance measuring wheel is distance measuring wheel 0 in cycle 0, then the time unit of the added segment can be the time unit of distance measuring wheel 1 in cycle 2, such as As shown in Figure 28. This application does not limit the relationship between the serial numbers of the two distance measuring wheels.

It should be understood that the above five examples are only illustrative descriptions, and this application does not limit the length and position of the time unit where the added segments are located. Moreover, in specific implementation, the above five examples can be combined with each other.

If the second operation is also to increase the number of segments of the UWB signal, the ranging initiating device can also perform similar processing, which will not be described here.

The above introduces a way of indicating information through preamble change. The following provides another communication method, which can indicate information through preamble code. Refer to Figure 29, which is a schematic flow chart of a communication method provided by this application. The method includes:

S2901. The ranging initiating device sends the first segment of the first UWB signal to the ranging response device. Correspondingly, the ranging response device receives the first segment of the first UWB signal from the ranging initiating device.

Among them, the first segment carries preamble A, and preamble A is used to trigger operation 1. Optionally, preamble A can be different from preamble D, and preamble D can be the preamble configured in the measurement control stage.

It should be understood that the preambles A to C in the method described in Figure 29 correspond one to one to the first to third preambles in the third and fourth aspects of the invention. Operations 1 and 2 in the method described in Figure 29 correspond one-to-one to the first and second operations in the third and fourth aspects of the invention.

For the relevant description of operation 1, please refer to the relevant description of operation 1 in the method described in Figure 8, and the description will not be repeated here.

It should be noted that, after sending the first segment, the ranging initiating device may also send at least one segment of the first UWB signal. The preamble carried by the at least one segment may be preamble A or preamble A. D, there is no specific limit here.

S2902: The ranging response device performs operation 1 according to the preamble A.

In the embodiment of the present application, the information is indicated through the preamble. Compared with sending the information through the NB channel, there is no need to perform LBT, which can increase the probability of the peer device (that is, the ranging response device) receiving the information, thereby improving UWB System reliability and robustness. For example, if the peer device is instructed to stop sending UWB signal segments through the NB channel, if the LBT does not compete for the NB channel, the peer device cannot receive the instruction to stop sending in time, causing the peer device to continue sending segments of the UWB signal. segment, on the one hand, it causes UWB resources to be occupied, which is wasteful, and on the other hand, it causes the device to consume a lot of power. In the embodiment of the present application, the preamble is used to trigger the opposite end device to stop sending the segments of the UWB signal, so that the opposite end device can receive the instruction to stop sending in time, and thus can stop sending the segments of the UWB signal in time. Through this method, on the one hand, UWB resources can be released in time to improve the utilization of UWB resources, and on the other hand, the power consumption of the device can be reduced.

Moreover, through the preamble indication information, the UWB signal can be prevented from carrying data, thereby avoiding the reduction of UWB signal power and the degradation of the signal reception quality of the initiator of the opposite end device (that is, the ranging response device).

In a possible implementation, the ranging initiating device may carry the preamble A in the segment of the first UWB signal when determining that the ranging response device performs operation 1. In this way, the ranging response device triggers the ranging response device to perform operation 1 when detecting the preamble A.

The specific process is similar to the process of changing the preamble of the ranging initiating device in the method described in Figure 8. The difference is that the previous section is to change the preamble, and here it carries a specific preamble (that is, preamble A). For details, please refer to Figure 8 In the method, the process of changing the preamble code by the ranging initiating device will not be described again.

In a possible implementation scenario, the method described in Figure 29 above can be applied to non-interleaved MMS. For example, assume that the ranging initiating device and the ranging response device have agreed in advance that each party will send 4 segments for ranging.

Without indicating information through the preamble, the ranging response device sequentially sends four segments of UWB signal 2 (ie, segment 0 to segment 3) to the ranging initiating device. After receiving the UWB signal, the ranging initiating device After the 4 segments of 2, the 4 segments of UWB signal 1 are sent to the ranging response device, as shown in Figure 30.

Taking operation 1 as a segment that stops sending UWB signals as an example, if the ranging initiating device receives segment 1 of UWB signal 2 sent by the ranging response device, it determines the accumulated signal strength of the received segments (for example, SNR value), the ranging initiating device can send segment 0 of UWB signal 1 to the ranging response device, and carry preamble A in segment 0. The ranging response device stops sending segment 2 and segment 3 of UWB signal 2 after receiving segment 0 of UWB signal 1.

Optionally, after sending segment 0 of UWB signal 1, the ranging initiating device can continue to send segment 1 to segment 3 of UWB signal 1, where segment 1 to segment 3 of UWB signal 1 can carry a preamble. Code A can also carry preamble D, which is not specifically limited here, as shown in Figure 31.

Optionally, in order to ensure that the ranging response device successfully detects the preamble A, the ranging initiating device may carry the preamble A in one or more segments sent after determining that the ranging response device performs operation 1. For details, please refer to the relevant description of the method described in Figure 8 in which the ranging initiating device can carry the second preamble in one or more segments sent after determining that the ranging response device performs operation 1. The description will not be repeated here.

The ranging initiating device may stop sending the preamble A after determining that the ranging response device detects the preamble A, or when a preconfigured number of segments of the first UWB signal is reached.

It should be noted that in this application, "send preamble A" can be understood as sending segments carrying preamble A, and "stop sending preamble A" can be understood as stopping sending segments carrying preamble A.

The way in which the ranging initiating device determines that the ranging response device detects preamble A is similar to the way in which the ranging initiating device determines that the ranging response device detects the second preamble carried in the second segment. The similarities are shown in Figure 8 The relevant descriptions will not be repeated here.

After the ranging initiating device instructs the ranging response device to perform operation 1, if the ranging initiating device receives the fifth segment of the second UWB signal from the ranging response device, and the fifth segment carries the preamble C, the ranging initiating device Perform operation 2 based on preamble C.

For the specific process, please refer to the process in which the ranging initiating device performs operation 2 under the instruction of the ranging response device in the method described in Figure 8, and the description will not be repeated here.

For operation 2, please refer to the relevant description of the first operation in the method described in Figure 8, and the description will not be repeated here. It should be noted that operation 2 and operation 1 may be the same or different, and are not specifically limited here.

In this method, the ranging initiating device and the ranging responding device can determine operation 1 in the following ways:

The distance initiating device and the ranging response device determine the first operation based on information 1. Wherein, information 1 indicates an operation corresponding to at least one preamble, and at least one preamble includes preamble A. Among them, information 1 corresponds to the first information in the third aspect and the fourth aspect of the invention.

For details of information 1, please refer to the relevant description of the third information in the method described in Figure 8, and the description will not be repeated here.

In this method, at least one detection point may also be predefined, and the at least one detection point is a time unit for sending preamble A (or other specific preambles, such as preamble B, preamble C, etc.). Based on this, the ranging initiating device can send preamble A (or other specific preambles, such as preamble B, preamble C, etc.) at any detection point. For example, the first segment can be sent at one of the detection points. Correspondingly, the ranging response device may detect the specific preamble only for the above-mentioned at least one detection point. Through the above method, the ranging response device can only detect the specific preamble in part of the time unit. Compared with detecting the specific preamble in all time units, this method can reduce the power consumption of the ranging response device.

Optionally, in the above embodiment, the ranging initiating device and the ranging response device determine the above at least one detection point based on information 2. Information 2 is used to configure at least one of the above detection points. Among them, information 2 corresponds to the second information in the third aspect and the fourth aspect of the invention.

For details of information 2, please refer to the relevant description of the fifth information in the method described in Figure 8, and the description will not be repeated here.

In the solution described above, if operation 1 is to increase the number of segments of the UWB signal, the ranging response device may need to consider the time unit occupied by the transmission of the increased segments when increasing the number of segments of the second UWB signal.

The following are some statements about the method described in Figure 8 and the method described in Figure 29.

It should be noted that the embodiments of this application involve preambles, including but not limited to the following types: Ipatov sequence, Golay sequence, M sequence, complementary zero-sum cross-correlation (CZC) sequence ), supercomplementary zero-sum cross-correlation (SZC), ZC (Zadoff–Chu) sequence, etc. As long as the sequence of different correlation peaks can be effectively distinguished, it falls within the scope of protection of this application, and this application does not place any restrictions on the specific preamble sequence.

The above table is only a presentation form of information, and any presentation form that essentially reflects the content and function of the above table is within the scope of protection of this application.

Based on the same inventive concept as the method embodiment, the embodiment of the present application provides a communication device. The structure of the communication device can be shown in Figure 32, including a transceiver module 3001 and a processing module 3002. Optionally, the transceiver module 3001 may include a transmit module (transport module, Tx module) and a receive module (receive module, Rx module), where the transmit module is used to send signals and the receive module is used to receive signals. The communication device can also include a radio frequency unit (RF unit). The radio frequency unit can be used to transmit signals to a receiving end device. The sending module can transmit the signal to be sent to the radio frequency unit for transmission. The receiving module can receive signals from The signal of the radio frequency unit is sent to the processing module 3002 for further processing.

In one implementation, the communication device may be used to implement the method performed by the first device in the embodiment of FIG. 8 . The device may be the first device itself, or may be a chip or chipset or chip in the first device. part of the function used to perform related methods. Among them, the transceiver module 3001 is used to communicate with the second device. The processing module 3002 is configured to send the second device to the second device through the transceiver module 3001. A first segment of a UWB signal, wherein the first segment carries a first preamble; and sending a second segment of the first UWB signal to the second device through the transceiver module 3001, wherein the second segment carries a first Two preambles, the first preamble and the second preamble are used to trigger the first operation, and the first preamble and the second preamble are different.

Exemplarily, the first operation includes one or more of the following:

Stop sending the segment of the second UWB signal;

Or, increase the number of segments of the second UWB signal;

Or, report the measurement results;

The processing module 3002 is also used to determine that the second device detects the second preamble.

The transceiver module 3001 is also configured to send at least one segment, and at least one segment carries the second preamble, before the processing module 3002 determines that the second device detects the second preamble.

The processing module 3002 is also configured to stop sending the second preamble after determining that the second device detects the second preamble.

Optionally, the processing module 3002 determines that the second device detects the second preamble carried by the second segment in the following manner: receiving the third segment in the second UWB signal through the transceiver module 3001, and the third segment carries the third Preamble, the third preamble is used to indicate that the second preamble is detected.

Optionally, the processing module 3002 determines that the second device detects the second preamble carried by the second segment in the following manner: the fourth segment in the second UWB signal is not received, and the fourth segment is not the same as the second segment. in the same time unit.

Optionally, the processing module 3002 determines that the second device detects the second preamble carried by the second segment in the following manner: the fifth segment of the second UWB signal is not received, and the time unit where the fifth segment is located is later than The time unit where the second segment is located.

The processing module 3002 is also configured to perform the first operation after determining that the second device detects the second preamble.

Optionally, the transceiver module 3001 is also configured to receive the sixth segment of the second UWB signal from the second device, where the sixth segment carries the first preamble; and, receive the sixth segment of the second UWB signal from the second device. The seventh segment carries a fourth preamble, and the fourth preamble is different from the first preamble. The processing module 3002 is also configured to perform a second operation according to the first preamble and the fourth preamble.

Exemplarily, the second operation includes one or more of the following:

Stop sending the segment of the first UWB signal;

Or, increase the number of segments of the first UWB signal;

Or, report the measurement results;

The processing module 3002 is also configured to indicate the first operation through the time unit in which the second segment is located.

The processing module 3002 is also configured to determine the first operation corresponding to the time unit where the second segment is located based on the first information; wherein the first information indicates an operation corresponding to at least one time unit, and the at least one time unit includes the time unit where the second segment is located. time unit; the first information is determined by the first device, or the first information comes from the second device, or the first information comes from the third device.

If the first information is determined by the first device, or the first information comes from a third device, the transceiver module 3001 is also used to send the first information to the second device.

The processing module 3002 is also configured to determine the first operation according to the second information; wherein the second information indicates: if the preamble carried by the segment of the UWB signal is changed, instruct the second device to perform the first operation; the second information is the first operation. One device determines, or the second information comes from a second device, or the second information comes from a third device.

If the second information is determined by the first device, or the second information comes from a third device, the transceiver module 3001 is also used to send the second information to the second device.

The processing module 3002 is also configured to determine the first operation according to the third information; wherein the third information indicates the operation corresponding to at least one preamble, and the at least one preamble includes the second preamble; the third information is determined by the first device, Alternatively, the third information comes from the second device, or the third information comes from the third device.

If the third information is determined by the first device, or the third information comes from the third device, the transceiver module 3001 is also used to send the third information to the second device.

In a possible design, the third information indicates an operation corresponding to at least one preamble, including: the third information indicates an operation corresponding to at least one cyclic shift length, wherein the second preamble is based on the first preamble and at least one cycle in a cycle shift length The shift length is determined. The above method can reduce signaling overhead.

The processing module 3002 is also configured to determine the first operation according to the fourth information; wherein the fourth information indicates at least one operation corresponding to the preamble change, and the preamble change includes the preamble before the change and the preamble after the change. The preamble is the first precode, and the changed preamble is the second precode, or the preamble before the change is the second precode, and the changed preamble is the first precode; the fourth information is the first The device determines, or the fourth information comes from the second device, or the fourth information comes from the third device.

In a possible design, the preamble before the change is determined based on the first preamble and the first cyclic shift length, and the preamble after the change is determined based on the first preamble and the second cyclic shift length.

The processing module 3002 is also configured to determine at least one detection point based on fifth information, and the fifth information is used to configure at least one detection point; the fifth information is determined by the first device, or the fifth information comes from the second device, or, The fifth information comes from the third device.

If the fifth information is determined by the first device, or the fifth information comes from a third device, the transceiver module 3001 is also configured to send the fifth information to the second device.

In one implementation, the communication device can be specifically used to implement the method performed by the second device in the embodiment of Figure 8. The device can be the second device itself, or it can be a chip or chipset or chip in the second device. part of the function used to perform related methods. Wherein, the transceiver module 3001 is configured to receive the first segment of the first UWB signal from the first device, wherein the first segment carries the first preamble; and, receive the first segment from the first device. A second segment of a first UWB signal, wherein the second segment carries a second preamble, and the first preamble and the second preamble are different. Processing module 3002, configured to perform a first operation according to the first preamble and the second preamble.

Exemplarily, the first operation includes one or more of the following:

Stop sending the segment of the second UWB signal;

Or, increase the number of segments of the second UWB signal;

Or, report the measurement results;

The transceiver module 3001 is also configured to send a third segment in the second UWB signal to the first device, where the third segment carries a third preamble, and the third preamble is used to indicate that the second preamble is detected.

The transceiver module 3001 is also configured to: starting from the fourth segment of the second UWB signal, stop sending the segments of the second UWB signal, and the fourth segment and the second segment are located in the same time unit.

The transceiver module 3001 is also configured to: starting from the fifth segment of the second UWB signal, stop sending the segments of the second UWB signal, and the time unit of the fifth segment is later than the time of the second segment. unit.

The transceiver module 3001 is also configured to: send the sixth segment of the second UWB signal to the first device, where the sixth segment carries the first preamble; and send the seventh segment of the second UWB signal to the first device. segment, the seventh segment carries the fourth preamble, the fourth preamble and the first preamble are used to trigger the first operation, and the fourth preamble is different from the first preamble.

Exemplarily, the second operation includes one or more of the following:

Stop sending the segment of the first UWB signal;

Or, increase the number of segments of the first UWB signal;

Or, report the measurement results;

The processing module 3002 is also configured to determine the first operation according to the time unit in which the second segment is located.

The processing module 3002 is also configured to determine the first operation corresponding to the time unit where the second segment is located based on the first information; wherein the first information indicates an operation corresponding to at least one time unit, and the at least one time unit includes the time unit where the second segment is located. time unit; the first information is determined by the second device, or the first information comes from the first device, or the first information comes from the third device.

If the first information is determined by the second device, or the first information comes from a third device, the transceiver module 3001 is also used to: send the first information to the first device.

The processing module 3002 is also configured to determine the first operation according to the second information; wherein the second information indicates: if the preamble carried by the segment of the UWB signal is changed, instruct the second device to perform the first operation; the second information is the first operation. The second device determines, alternatively, the second information comes from The first device, or the second information comes from the third device.

If the second information is determined by the second device, or the second information comes from a third device, the transceiver module 3001 is also configured to: the second device sends the second information to the first device.

The processing module 3002 is also configured to determine the first operation according to the third information; wherein the third information indicates the operation corresponding to at least one preamble, and the at least one preamble includes the second preamble; the third information is determined by the second device, Either the third information comes from the first device, or the third information comes from the third device.

If the third information is determined by the second device, or the third information comes from the third device, the transceiver module 3001 is also configured to: the second device sends the third information to the first device.

In a possible design, the third information indicates an operation corresponding to at least one preamble, including: the third information indicates an operation corresponding to at least one cyclic shift length, wherein the second preamble is based on the first preamble and at least A cyclic shift length is determined by a cyclic shift length.

The processing module 3002 is also configured to determine the first operation according to the fourth information; wherein the fourth information indicates at least one operation corresponding to the preamble change, and the preamble change includes the preamble before the change and the preamble after the change. The preamble is the first precode, and the changed preamble is the second precode, or the preamble before the change is the second precode, and the changed preamble is the first precode; the fourth information is the second The device determines, or the fourth information comes from the first device, or the fourth information comes from the third device.

The processing module 3002 is also configured to determine at least one detection point based on fifth information, and the fifth information is used to configure at least one detection point; the fifth information is determined by the second device, or the fifth information comes from the first device, or, The fifth information comes from the third device.

If the fifth information is determined by the second device, or the fifth information comes from a third device, the transceiver module 3001 is also configured to: the second device sends the fifth information to the first device.

In one implementation, the communication device can be used to implement the method performed by the first device in the embodiment of Figure 29. The device can be the first device itself, or it can be a chip or chipset or chip in the first device. part of the function used to perform related methods. Among them, the transceiver module 3001 is used to communicate with the second device. The processing module 3002 is configured to send the first segment of the first UWB signal to the second device through the transceiver module 3001, where the first segment carries a first preamble, and the first preamble is used to trigger the first operation; The first operation includes one or more of the following: stopping sending segments of the second UWB signal; or increasing the number of segments of the second UWB signal; or sending a first indication to the first device, The first instruction is used to start the distance measuring wheel; or, to report the measurement results; or to respond to the second instruction from the first device, where the second instruction is used to start the distance measuring wheel.

The processing module 3002 is also used to determine that the second device detects the first preamble.

The transceiving module 3001 is also configured to: before the processing module 3002 determines that the second device detects the first preamble, send at least one segment, and the at least one segment carries the first preamble.

The transceiver module 3001 is also configured to: stop sending the first preamble after the processing module 3002 determines that the second device detects the first preamble.

The processing module 3002 determines that the second device detects the first preamble carried by the first segment in the following manner: receiving the second segment in the second UWB signal through the transceiver module 3001, and the second segment carries the second preamble, and the second segment carries the second preamble. The second preamble is used to indicate that the first preamble is detected.

The processing module 3002 determines that the second device detects the first preamble carried by the first segment in the following manner: the transceiver module 3001 does not receive the third segment in the second UWB signal, and the third segment is the same as the first segment. in the same time unit.

The processing module 3002 determines that the second device detects the first preamble carried by the first segment in the following manner: the fourth segment of the second UWB signal is not received by the transceiver module 3001, and the time unit where the fourth segment is located is later than The time unit of the first segment.

The transceiver module 3001 is also configured to: receive the fifth segment of the second UWB signal from the second device, where the fifth segment carries the third preamble; and the first device performs the second operation according to the third preamble.

Exemplarily, the second operation includes one or more of the following:

Stop sending the segment of the first UWB signal;

Or, increase the number of segments of the first UWB signal;

Or, report the measurement results;

The processing module 3002 is also configured to: determine a first operation according to the first information; wherein the first information indicates an operation corresponding to at least one preamble, and the at least one preamble includes the first preamble; the first information is determined by the first device , or the first information comes from the second device, or the first information comes from the third device.

If the first information is determined by the first device, or the first information comes from a third device, the transceiver module 3001 is also used to: send the first information to the second device.

In a possible design, the first information indicates an operation corresponding to at least one preamble, including: the first information indicates an operation corresponding to at least one cyclic shift length, wherein the first preamble is based on a preset preamble and At least one of the cyclic shift lengths is determined by one of the cyclic shift lengths.

The processing module 3002 is also configured to: determine at least one detection point according to the second information, and the second information is used to configure the at least one detection point; the second information is determined by the first device, or the second information comes from the second device, or , the second information comes from the third device.

If the second information is determined by the first device, or the second information comes from a third device, the transceiver module 3001 is also used to: send the second information to the second device.

In one implementation, the communication device can be used to implement the method performed by the second device in the embodiment of Figure 29. The device can be the second device itself, or it can be a chip or chipset or chip in the second device. part of the function used to perform related methods. The transceiver module 3001 is configured to receive a first segment of the first UWB signal from the first device, where the first segment carries a first preamble. Processing module 3002, configured to perform a first operation according to the first preamble. The first operation is to stop sending segments of the second UWB signal; or, the first operation is to increase the number of segments of the second UWB signal; or, the first operation is to send a signal to the first device. Send a first instruction, the first instruction is used to start the distance measuring wheel; or the first operation is to report the measurement results; or the first operation is to respond to the second instruction from the first device In response, the second indication is used to activate the distance measuring wheel.

The transceiver module 3001 is also configured to: send a second segment in the second UWB signal to the first device, where the second segment carries a second preamble, and the second preamble is used to indicate that the first preamble is detected.

The transceiver module 3001 is also configured to stop sending the segments of the second UWB signal starting from the third segment of the second UWB signal, where the third segment and the first segment are located in the same time unit.

The transceiver module 3001 is also configured to: starting from the fourth segment of the second UWB signal, stop sending the segments of the second UWB signal, where the time unit of the fourth segment is later than the time unit of the first segment.

The transceiver module 3001 is also configured to: send the fifth segment of the second UWB signal to the first device, where the fifth segment carries a third preamble, and the third preamble is used to trigger the second operation.

Stop sending the segment of the first UWB signal;

Or, increase the number of segments of the first UWB signal;

Or, report the measurement results;

The processing module 3002 is also configured to: determine a first operation according to the first information; wherein the first information indicates an operation corresponding to at least one preamble, and the at least one preamble includes the first preamble; the first information is determined by the second device , or the first information comes from the first device, or the first information comes from the third device.

In a possible design, the first information indicates an operation corresponding to at least one preamble, including: the first information indicates an operation corresponding to at least one cyclic shift length, wherein the first preamble is based on a preset preamble and at least A cyclic shift length is determined by a cyclic shift length.

The processing module 3002 is also configured to: determine at least one detection point according to the second information, and the second information is used to configure at least one detection point; The second information is determined by the second device, or the second information comes from the first device, or the second information comes from the third device.

For details, please refer to the relevant description of the method described in FIG. 8 or FIG. 29 , and the details will not be repeated here.

The division of modules in the embodiments of the present application is schematic and is only a logical function division. In actual implementation, there may be other division methods. In addition, each functional module in each embodiment of the present application may be integrated into one processing unit. In the device, it can exist physically alone, or two or more modules can be integrated into one module. The above integrated modules can be implemented in the form of hardware or software function modules. It can be understood that, for the functions or implementation of each module in the embodiments of this application, further reference can be made to the relevant descriptions of the method embodiments.

In a possible way, the communication device may be as shown in Figure 33. The device may be a communication device or a chip in the communication device, where the communication device may be the first device in the above embodiment or may be the first device in the above embodiment. of the second device. The device includes a processor 3101 and a communication interface 3102, and may also include a memory 3103. Among them, the processing module 3002 can be the processor 3101. The transceiver module 3001 may be a communication interface 3102. Figure 31 shows only the main components of the communication device. In addition to the processor 3101 and the communication interface 3102, the communication device may further include a memory 3103 and an input and output device (not shown in the figure).

The processor 3101 is used to execute the program code stored in the memory 3103, and is specifically used to execute the actions of the above-mentioned processing module 3002, which will not be described again in this application. The communication interface 3102 is specifically used to perform the actions of the above-mentioned transceiver module 3001, which will not be described again in this application.

The processor 3101 may be a CPU, or a digital processing unit, or the like. The processor 3101 can be used to process communication protocols and communication data, control the entire communication device, execute software programs, and process data of the software programs, such as but not limited to baseband-related processing. The communication interface 3102 may be used to transmit and receive signals, such as, but not limited to, radio frequency transmission and reception. The above-mentioned devices may be arranged on separate chips, or at least part or all of them may be arranged on the same chip. For example, the processor 3101 can be further divided into an analog baseband processor and a digital baseband processor. Among them, the analog baseband processor can be integrated with the transceiver on the same chip, and the digital baseband processor can be set on an independent chip. With the continuous development of integrated circuit technology, more and more devices can be integrated on the same chip. For example, a digital baseband processor can be combined with a variety of application processors (such as but not limited to graphics processors, multimedia processors, etc.) Integrated on the same chip. Such a chip can be called a system on chip. Whether each device is independently installed on different chips or integrated on one or more chips often depends on the specific needs of product design. The embodiments of the present invention do not limit the specific implementation forms of the above devices.

The communication interface 3102 may be a transceiver, an interface circuit such as a transceiver circuit, etc., or a transceiver chip, or the like. Optionally, the communication interface 3102 may include a radio frequency circuit and an antenna. The radio frequency circuit is mainly used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals. Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users.

Memory 3103 is used to store programs executed by the processor 3101. The memory 3103 can be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), or a volatile memory (volatile memory), such as a random access memory (random access memory). -access memory, RAM). Memory 3103 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.

When the communication device is turned on, the processor 3101 can read the software program in the memory 3103, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 3101 performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal out in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 3101. The processor 3101 converts the baseband signal into data and performs processing on the data. deal with.

In another implementation, the radio frequency circuit and antenna can be arranged independently of the processor that performs baseband processing. For example, in a distributed scenario, the radio frequency circuit and antenna can be arranged remotely and independently of the communication device. .

The specific connection medium between the above-mentioned communication interface 3102, processor 3101 and memory 3103 is not limited in the embodiment of the present application. In the embodiment of the present application, the memory 3103, the processor 3101 and the communication interface 3102 are connected through a bus 3104 in Figure 31. The bus is represented by a thick line in Figure 31. The connection methods between other components are only schematically explained. , is not limited. The bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in Figure 31, but it does not mean that there is only one bus or one type of bus.

Optionally, the above communication device may be an independent device or may be a part of a larger device. For example, the communication device may be:

(1) Independent integrated circuit (IC), or chip, or chip system or subsystem;

(2) A collection of one or more ICs. Optionally, the IC collection may also include a storage component for storing data and instructions;

(3) Application specific integrated circuit (ASIC), such as modem;

(4) Modules that can be embedded in other devices;

(5) Receivers, smart terminals, wireless devices, handheld devices, mobile units, vehicle-mounted equipment, cloud equipment, artificial intelligence equipment, etc.;

(6) Others, etc.

Embodiments of the present invention also provide a computer-readable storage medium for storing computer software instructions required to execute the above processor, which includes programs required to execute the above processor.

An embodiment of the present application also provides a communication system, including a communication device for realizing the function of the first device in the embodiment of FIG. 8 and a communication device for realizing the function of the second device in the embodiment of FIG. 8 .

An embodiment of the present application also provides a communication system, including a communication device for realizing the function of the first device in the embodiment of FIG. 29 and a communication device for realizing the function of the second device in the embodiment of FIG. 29 .

Those skilled in the art will understand that embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the present application. It will be understood that each process and/or block in the flowchart illustrations and/or block diagrams, and combinations of processes and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing device produce a use A device for realizing the functions specified in one process or multiple processes of the flowchart and/or one block or multiple blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions The device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.

These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device. Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A communication method, characterized in that the method includes:

The first device sends a first segment of the first ultra-wideband UWB signal to the second device, wherein the first segment carries a first preamble;

The first device sends a second segment of the first UWB signal to the second device, wherein the second segment carries a second preamble, the first preamble and the second preamble code is used to trigger the first operation, and the first preamble code and the second preamble code are different.
The method of claim 1, wherein the first operation includes one or more of the following:

Stop sending the segment of the second UWB signal;

Or, increase the number of segments of the second UWB signal;

Alternatively, send a first instruction to the first device, the first instruction being used to activate the distance measuring wheel;

Or, report the measurement results;

Alternatively, respond to a second instruction from the first device for activating the distance measuring wheel.
The method according to claim 1 or 2, characterized in that the method further includes:

The first device determines that the second device detects the second preamble.
The method of claim 3, wherein before the first device determines that the second device detects the second preamble, the method further includes:

The first device sends at least one segment carrying the second preamble.
The method of claim 3 or 4, wherein after the first device determines that the second device detects the second preamble, the method further includes:

The first device stops sending the second preamble.
The method according to any one of claims 3-5, wherein the first device determines that the second device detects the second preamble, including:

The first device determines that the second device detects the second preamble carried by the second segment in one of the following ways:

The first device receives a third segment in the second UWB signal, the third segment carries a third preamble, and the third preamble is used to indicate detection of the second preamble;

Alternatively, the first device does not receive the fourth segment in the second UWB signal, and the fourth segment and the second segment are located in the same time unit;

Alternatively, the first device does not receive the fifth segment of the second UWB signal, and the time unit in which the fifth segment is located is later than the time unit in which the second segment is located.
The method according to any one of claims 3-6, characterized in that, after the first device determines that the second device detects the second preamble, the method further includes:

The first device performs the first operation.
The method according to any one of claims 1 to 6, characterized in that the method further includes:

The first device receives a sixth segment of the second UWB signal from the second device, the sixth segment carrying the first preamble;

The first device receives a seventh segment of the second UWB signal from the second device, the seventh segment carries a fourth preamble, the fourth preamble is identical to the first preamble different;

The first device performs a second operation according to the first preamble and the fourth preamble.
The method of claim 8, wherein the second operation includes one or more of the following:

Stop transmitting the segment of the first UWB signal;

Or, increase the number of segments of the first UWB signal;

Alternatively, send a third instruction to the second device, the third instruction being used to activate the distance measuring wheel;

Or, report the measurement results;

Alternatively, respond to a fourth instruction from the second device for activating the distance measuring wheel.
The method according to any one of claims 1 to 9, characterized in that the method further includes:

The first device indicates the first operation through the time unit in which the second segment is located.
The method according to any one of claims 1 to 9, characterized in that the method further includes:

The first device determines the first operation based on the second information;

Wherein, the second information indicates: if the preamble carried by the segment of the UWB signal is changed, instruct the second device to perform the first operation;

The second information is determined by the first device, or the second information comes from the second device, or the second information comes from a third device.
The method according to any one of claims 1 to 9, characterized in that the method further includes:

The first device determines the first operation based on third information;

Wherein, the third information indicates an operation corresponding to at least one preamble, and the at least one preamble includes the second preamble;

The third information is determined by the first device, or the third information comes from the second device, or the third information comes from a third device.
The method of claim 12, wherein the third information indicates operations corresponding to at least one preamble, including:

The third information indicates an operation corresponding to at least one cyclic shift length, wherein the second preamble is determined based on the first preamble and one of the at least one cyclic shift length. .
The method according to any one of claims 1 to 13, characterized in that the time unit in which the second segment is located belongs to at least one detection point, and the at least one detection point is used to change the preamble.
A communication method, characterized in that the method includes:

The second device receives a first segment of the first ultra-wideband UWB signal from the first device, wherein the first segment carries a first preamble;

The second device receives a second segment of the first UWB signal from the first device, wherein the second segment carries a second preamble, the first preamble and the second The preamble is different;

The second device performs a first operation according to the first preamble and the second preamble.
The method of claim 15, wherein the first operation includes one or more of the following:

Stop sending the segment of the second UWB signal;

Or, increase the number of segments of the second UWB signal;

Alternatively, send a first instruction to the first device, the first instruction being used to activate the distance measuring wheel;

Or, report the measurement results;

Alternatively, respond to a second instruction from the first device for activating the distance measuring wheel.
The method according to claim 15 or 16, characterized in that the method further includes:

The second device sends a third segment in the second UWB signal to the first device, the third segment carries a third preamble, and the third preamble is used to indicate that the detection of the second preamble;

Alternatively, starting from the fourth segment in the second UWB signal, the second device stops sending the segment of the second UWB signal, the fourth segment and the second segment are located in the same time unit;

Alternatively, starting from the fifth segment in the second UWB signal, the second device stops sending the segment of the second UWB signal, and the time unit in which the fifth segment is located is later than the second segment. The time unit in which the segment is located.
The method according to any one of claims 15-17, characterized in that the method further includes:

The second device sends a sixth segment of the second UWB signal to the first device, the sixth segment carrying the first preamble;

The second device sends a seventh segment of the second UWB signal to the first device, the seventh segment carries a fourth preamble, and the fourth preamble and the first preamble are used To trigger the first operation, the fourth preamble is different from the first preamble.
The method of claim 18, wherein the second operation includes one or more of the following:

Stop transmitting the segment of the first UWB signal;

Or, increase the number of segments of the first UWB signal;

Alternatively, send a third instruction to the second device, the third instruction being used to activate the distance measuring wheel;

Or, report the measurement results;

Alternatively, respond to a fourth instruction from the second device for activating the distance measuring wheel.
The method according to any one of claims 15-19, characterized in that the method further includes:

The second device determines the first operation based on the time unit in which the second segment is located.
The method according to any one of claims 15-19, characterized in that the method further includes:

The second device determines the first operation based on the second information;

Wherein, the second information indicates: if the preamble carried by the segment of the UWB signal is changed, instruct the second device to perform the first operation;

The second information is determined by the second device, or the second information comes from the first device, or the second information comes from a third device.
The method according to any one of claims 15-19, characterized in that the method further includes:

The first device determines the first operation based on third information;

Wherein, the third information indicates an operation corresponding to at least one preamble, and the at least one preamble includes the second preamble;

The third information is determined by the second device, or the third information comes from the first device, or the third information comes from a third device.
The method of claim 22, wherein the third information indicates operations corresponding to at least one preamble, including:

The third information indicates an operation corresponding to at least one cyclic shift length, wherein the second preamble is determined based on the first preamble and one of the at least one cyclic shift length. .
The method according to any one of claims 15 to 23, characterized in that the time unit in which the second segment is located belongs to at least one detection point, and the at least one detection point is used to detect whether the preamble is changed.
A communication device, characterized by including a memory and a processor;

The memory is used to store instructions;

The processor is configured to execute the instructions to implement the method according to any one of claims 1-14.
A communication device, characterized by including a memory and a processor;

The memory is used to store instructions;

The processor is configured to execute the instructions to implement the method according to any one of claims 15-24.
A computer-readable storage medium, characterized in that the computer-readable storage medium is used to store computer instructions. When the computer instructions are run on a computer, the computer is caused to execute any one of claims 1 to 24. method described in the item.