Method, device and system for avoiding interference from different systems

Abstract

The embodiments of the present application provide a method, device and system for avoiding interference from different systems, which relate to the field of communication technology and can improve the interference between different systems on unlicensed spectrum. The method includes: a first device broadcasts a wireless fidelity WiFi message; wherein the first device uses a first communication system for communication, and the first communication system is a sidelink unlicensed SL-U system, a new air interface unlicensed spectrum NR-U system or a licensed spectrum assisted access LAA system; the WiFi message includes duration indication information, and the duration indication information is used to indicate a first duration, and the first duration is used to indicate that the second device does not occupy the first channel within the first duration, the spectrum where the first channel is located is an unlicensed spectrum, and the second device is a device that communicates through the WiFi system; the first device sends first information to a third device through the first communication system; wherein the first information includes service data and / or control information.

Description

[0001] This application claims the priority of the Chinese patent application filed with the State Intellectual Property Office on June 30, 2020, with application number 202010607278.0 and application name “A method and UE for providing auxiliary information”, the entire contents of which are incorporated by reference in this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a method, device and system for avoiding interference from a different system. Background Art

[0003] In existing communication systems, since unlicensed spectrum is open, all communication systems can use unlicensed spectrum for communication. In the 5GHz frequency band, existing communication systems can include sidelink-unlicense (SL-U) system, new radio-unlicense (NR-U) system, licensed assisted access (LAA) system and wireless fidelity (WiFi) system.

[0004] However, since multiple communication systems can use unlicensed spectrum for communication, different communication systems will have inter-system interference due to channel occupancy issues. For example, in the 5GHz frequency band, for the SL-U system, the LAA system has less interference to the SL-U system due to industrial issues, while the WiFi system has greater interference to the SL-U system. When the WiFi system occupies the channel for a long time, the SL-U system will not be able to operate normally. Therefore, how to improve the inter-system interference between various communication systems on the unlicensed spectrum has become an urgent problem to be solved. Summary of the invention

[0005] In view of this, the purpose of the present application is to provide a method, device and system for avoiding heterogeneous system interference, which can improve heterogeneous system interference between various communication systems on unlicensed spectrum.

[0006] In the first aspect, an embodiment of the present application provides a method for avoiding interference from a different system, which is applied to a first device. The first device uses a first communication system for communication, and the first communication system is a sidelink unlicensed SL-U system, a new air interface unlicensed spectrum NR-U system, or a licensed spectrum assisted access LAA system; the method includes: the first device broadcasts a wireless fidelity WiFi message including duration indication information; the duration indication information is used to indicate a first duration, and the first duration is used to indicate that the second device does not occupy a first channel within the first duration, the spectrum where the first channel is located is an unlicensed spectrum, and the second device is a device that communicates through the WiFi system; the first device sends first information including service data and / or control information to a third device through the first communication system.

[0007] Based on the first aspect, the first device sends a WiFi message to the second device of the different system to indicate that the second device does not occupy the first channel, so that the second device does not occupy the first channel after receiving the WiFi message. When the second device does not occupy the first channel, the first device sends the first information to the third device of the same system, which can reduce interference between different systems and improve communication reliability between the same system.

[0008] In one possible design, the first duration is greater than or equal to the transmission duration of the first information.

[0009] Based on this possible design, the first device can determine the first duration based on the transmission duration of the first information, ensuring that when the first device sends the first information to the third device, the second device does not occupy the first channel, thereby reducing interference between different systems and improving communication reliability between the same systems.

[0010] In one possible design, the first device performs channel detection and / or idle channel assessment CCA to measure interference power; when the interference power meets a preset threshold, the first device broadcasts a WiFi message.

[0011] Based on this possible design, the first device can avoid frequently broadcasting WiFi messages by broadcasting a WiFi message when the measured interference power meets a preset threshold. While reducing interference between different systems, it ensures that the first communication system and the second communication system can operate normally, and can also reduce the power consumption of the first device.

[0012] In one possible design, the first information is also used to instruct the first device to broadcast a WiFi message.

[0013] Based on this possible design, the first device can indicate to the third device that the first device has broadcast a WiFi message that does not occupy the first channel by sending the first information for instructing the first device to broadcast a WiFi message to the third device, thereby enabling the third device to communicate with devices in the same system when the second device in a different system does not occupy the first channel, thereby improving the communication reliability between the same systems.

[0014] In one possible design, the first information is used to indicate the time and frequency resources of the WiFi message.

[0015] Based on this possible design, the first device can indicate the time-frequency resources of the WiFi message to the third device, so that the third device can remove the interference power corresponding to the WiFi message according to the time-frequency resources when measuring the interference power, thereby improving the accuracy of the interference power determined by the third device.

[0016] In one possible design, after the first device broadcasts a WiFi message, the first device sends the first information to the third device after a first reserved time.

[0017] Based on this possible design, the first device can send the first information to the third device after the first reserved time period after broadcasting the WiFi message, so as to ensure that the first device sends the first information to the third device after the second device receives the WiFi message and does not occupy the first channel, thereby reducing interference between different systems and improving communication reliability between the same systems.

[0018] In one possible design, the first reserved duration is greater than or equal to the sum of the transmission duration of the WiFi message and the first switching delay; wherein the first switching delay is the delay required for the first device to switch from broadcasting the WiFi message to sending the first information.

[0019] Based on this possible design, the first reserved duration may be greater than or equal to the sum of the transmission duration of the WiFi message and the first switching delay, which provides a feasible solution for the first device to determine the first reserved duration.

[0020] In one possible design, after the first device determines to broadcast a WiFi message, the first device sends a WiFi message to the second device after a second reserved time.

[0021] In one possible design, the second reserved time duration is greater than or equal to the second switching delay; wherein the second switching delay is the delay required for the first device to switch to sending a WiFi message.

[0022] Based on the above two possible designs, after determining that a WiFi message needs to be broadcast, the first device can broadcast the WiFi message after the second reserved duration, thereby ensuring that the first device sends the WiFi message after the resource scheduling required for sending the WiFi message is completed, thereby improving the success rate of sending the WiFi message.

[0023] In the second aspect, an embodiment of the present application provides a first device, which can implement the function performed by the first device in the above-mentioned first aspect or a possible design of the first aspect, and the function can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions. For example, a transceiver module. The transceiver module is used to broadcast a wireless fidelity WiFi message including duration indication information; the duration indication information is used to indicate a first duration, and the first duration is used to indicate that the second device does not occupy the first channel within the first duration, the spectrum where the first channel is located is an unlicensed spectrum, and the second device is a device that communicates through a WiFi system; the transceiver module is also used to send first information including business data and / or control information to a third device through the first communication system.

[0024] Among them, the specific implementation method of the first device can refer to the behavior function of the first device in the heterogeneous system interference avoidance method provided by the first aspect or any possible design of the first aspect. Based on the first device described in the second aspect, the first device sends a WiFi message to the second device of the heterogeneous system to indicate that the second device does not occupy the first channel, so that the second device does not occupy the first channel after receiving the WiFi message. The first device sends the first information to the third device of the same system when the second device does not occupy the first channel, which can reduce the interference between heterogeneous systems and improve the communication reliability between the same system.

[0025] In one possible design, the first duration is greater than or equal to the transmission duration of the first information.

[0026] Based on this possible design, the first device can determine the first duration based on the transmission duration of the first information, ensuring that when the first device sends the first information to the third device, the second device does not occupy the first channel, thereby reducing interference between different systems and improving communication reliability between the same systems.

[0027] In one possible design, the first device also includes a processing module, wherein the processing module is used to perform channel detection and / or idle channel assessment CCA, and measure interference power; when the interference power meets a preset threshold, the transceiver module broadcasts a WiFi message.

[0028] Based on this possible design, the first device can avoid frequently broadcasting WiFi messages by broadcasting WiFi messages when the measured interference power meets a preset threshold. While reducing interference between different systems, it ensures that the first communication system and the second communication system can operate normally, and can also reduce the power consumption of the first device.

[0029] In one possible design, the first information is also used to instruct the first device to broadcast a WiFi message.

[0030] Based on this possible design, the first device can indicate to the third device that the first device has broadcast a WiFi message that does not occupy the first channel by sending the first information for instructing the first device to broadcast a WiFi message to the third device, thereby enabling the third device to communicate with devices in the same system when the second device in a different system does not occupy the first channel, thereby improving the communication reliability between the same systems.

[0031] In one possible design, the first information is used to indicate the time and frequency resources of the WiFi message.

[0032] Based on this possible design, the first device can indicate the time-frequency resources of the WiFi message to the third device, so that the third device can remove the interference power corresponding to the WiFi message according to the time-frequency resources when measuring the interference power, thereby improving the accuracy of the interference power determined by the third device.

[0033] In one possible design, the transceiver module is also used to send the first information to the third device after the first reserved time period after broadcasting the WiFi message.

[0034] Based on this possible design, the first device can send the first information to the third device after the first reserved time period after broadcasting the WiFi message, so as to ensure that the first device sends the first information to the third device after the second device receives the WiFi message and does not occupy the first channel, thereby reducing interference between different systems and improving communication reliability between the same systems.

[0035] In one possible design, the first reserved duration is greater than or equal to the sum of the transmission duration of the WiFi message and the first switching delay; wherein the first switching delay is the delay required for the first device to switch from broadcasting the WiFi message to sending the first information.

[0036] Based on this possible design, the first reserved duration may be greater than or equal to the sum of the transmission duration of the WiFi message and the first switching delay, which provides a feasible solution for the first device to determine the first reserved duration.

[0037] In one possible design, after the processing module determines to broadcast the WiFi message, the transceiver module sends the WiFi message to the second device after a second reserved time.

[0038] In one possible design, the second reserved time duration is greater than or equal to the second switching delay; wherein the second switching delay is the delay required for the first device to switch to sending a WiFi message.

[0039] Based on the above two possible designs, after determining that a WiFi message needs to be broadcast, the first device can broadcast the WiFi message after the second reserved duration, thereby ensuring that the first device sends the WiFi message after the resource scheduling required for sending the WiFi message is completed, thereby improving the success rate of sending the WiFi message.

[0040] In a third aspect, an embodiment of the present application provides a first device, which may be a first device or a chip or system on chip in the first device. The first device may implement the functions performed by the first device in the above aspects or possible designs, and the functions may be implemented by hardware. In one possible design, the first device may include: a transceiver. The transceiver may be used to support the first device to implement the functions involved in the above first aspect or any possible design of the first aspect. For example: the transceiver may be used to broadcast a wireless fidelity WiFi message including duration indication information; the duration indication information is used to indicate a first duration, the first duration is used to indicate that the second device does not occupy the first channel within the first duration, the spectrum where the first channel is located is an unlicensed spectrum, and the second device is a device that communicates through a WiFi system; the transceiver may also be used to send first information including service data and / or control information to a third device through the first communication system. In another possible design, the first device may also include a processor and a memory, the memory being used to store computer execution instructions and data necessary for the first device. When the first device is running, the transceiver and the processor execute the computer-executable instructions stored in the memory, so that the first device performs the alien system interference avoidance method as described in the first aspect or any possible design of the first aspect.

[0041] Among them, the specific implementation method of the first device can refer to the behavior function of the first device in the heterogeneous system interference avoidance method provided by the first aspect or any possible design of the first aspect.

[0042] In a fourth aspect, an embodiment of the present application provides a method for avoiding interference from a different system, the method comprising: a second device obtains a WiFi message including duration indication information from a first device; wherein the second device is a device that communicates through a WiFi system; the first device uses a first communication system to communicate, and the first communication system is a sidelink unlicensed SL-U system, a new air interface unlicensed spectrum NR-U system, or a licensed spectrum assisted access LAA system; the duration indication information is used to indicate a first duration, and the first duration is used to indicate that the second device does not occupy a first channel within the first duration, and the spectrum where the first channel is located is an unlicensed spectrum; the second device does not occupy the first channel within the first duration according to the WiFi message.

[0043] Based on the fourth aspect, the second device does not occupy the first channel according to the WiFi message broadcast by the first device of the different system. When the second device does not occupy the first channel, the first device can send the first information to the third device located in the same system as the first device, so as to reduce interference between different systems and improve communication reliability between the same systems.

[0044] In a fifth aspect, an embodiment of the present application provides a second device, which can implement the function performed by the second device in the fourth aspect or the possible design of the fourth aspect, and the function can be implemented by hardware executing the corresponding software. The hardware or software includes one or more modules corresponding to the above functions. For example, a transceiver module and a processing module. The transceiver module is used to obtain a WiFi message including duration indication information from the first device; wherein the second device is a device that communicates through a WiFi system; the first device uses a first communication system for communication, and the first communication system is a sidelink unlicensed SL-U system, a new air interface unlicensed spectrum NR-U system, or an authorized spectrum assisted access LAA system; the duration indication information is used to indicate a first duration, and the first duration is used to indicate that the second device does not occupy the first channel within the first duration, and the spectrum where the first channel is located is an unlicensed spectrum; the processing module is used to not occupy the first channel within the first duration according to the WiFi message.

[0045] Among them, the specific implementation method of the second device can refer to the behavioral function of the second device in the heterosystem interference avoidance method provided by the fourth aspect or any possible design of the fourth aspect. Based on the second device described in the fifth aspect, the second device does not occupy the first channel according to the WiFi message broadcast by the first device of the heterosystem. When the second device does not occupy the first channel, the first device can send the first information to the third device located in the same system as the first device, so as to reduce interference between heterosystems and improve communication reliability between the same systems.

[0046] It should be noted that the relevant descriptions of WiFi messages in the fourth and fifth aspects can refer to the specific descriptions of WiFi messages in the first and second aspects mentioned above, and will not be repeated here.

[0047] In a sixth aspect, an embodiment of the present application provides a second device, which may be a second device or a chip or system on chip in the second device. The second device may implement the functions performed by the second device in the above aspects or possible designs, and the functions may be implemented by hardware. In one possible design, the second device may include: a transceiver and a processor. The transceiver and the processor may be used to support the second device to implement the functions involved in the above fourth aspect or any possible design of the fourth aspect. For example: the transceiver may be used to obtain a WiFi message including duration indication information from the first device; wherein the second device is a device for communicating through a WiFi system; the first device uses a first communication system for communication, and the first communication system is a sidelink unlicensed SL-U system, a new air interface unlicensed spectrum NR-U system, or a licensed spectrum assisted access LAA system; the duration indication information is used to indicate a first duration, and the first duration is used to indicate that the second device does not occupy the first channel within the first duration, and the spectrum where the first channel is located is an unlicensed spectrum; the processor may be used to not occupy the first channel within the first duration according to the WiFi message. In another possible design, the second device may also include a memory, which is used to store computer execution instructions and data necessary for the second device. When the second device is running, the transceiver and the processor execute the computer-executable instructions stored in the memory, so that the second device performs the heterosystem interference avoidance method as described in the fourth aspect or any possible design of the fourth aspect.

[0048] Among them, the specific implementation method of the second device can refer to the behavior function of the second device in the heterogeneous system interference avoidance method provided by the fourth aspect or any possible design of the fourth aspect.

[0049] In the seventh aspect, an embodiment of the present application provides a method for avoiding interference from a different system, the method comprising: after a first device broadcasts a WiFi message including duration indication information, a third device receives first information including business data and / or control information sent by the first device through a first communication system; wherein the first device uses the first communication system to communicate, and the first communication system is a sidelink unlicensed SL-U system, a new air interface unlicensed spectrum NR-U system, or a licensed spectrum assisted access LAA system; the duration indication information is used to indicate a first duration, and the first duration is used to indicate that the second device does not occupy a first channel within the first duration, the spectrum where the first channel is located is an unlicensed spectrum, and the second device is a device that communicates through the WiFi system.

[0050] Based on the seventh aspect, the first device sends the first information to the third device after broadcasting a WiFi message for indicating that the second device does not occupy the first channel, so that the first device sends the first information to the third device when the second device does not occupy the first channel, thereby reducing interference between different systems and improving communication reliability between the same systems.

[0051] In one possible design, the third device determines the interference power corresponding to the third device based on the first information; wherein the interference power corresponding to the third device is the difference between the initial interference power determined when the third device performs channel detection and / or idle channel assessment CCA and the interference power corresponding to the WiFi message.

[0052] Based on this possible design, the third device can improve the accuracy of the interference power determined by the third device by removing the interference power corresponding to the WiFi message when determining the interference power corresponding to the third device.

[0053] In the eighth aspect, an embodiment of the present application provides a third device, which can implement the function performed by the third device in the seventh aspect or the possible design of the seventh aspect, and the function can be implemented by hardware executing the corresponding software. The hardware or software includes one or more modules corresponding to the above functions. For example, a transceiver module. The transceiver module is used to receive the first information including business data and / or control information sent by the first device through the first communication system after the first device broadcasts a WiFi message including duration indication information; wherein the first device uses the first communication system to communicate, and the first communication system is a sidelink unlicensed SL-U system, a new air interface unlicensed spectrum NR-U system, or an authorized spectrum assisted access LAA system; the duration indication information is used to indicate the first duration, and the first duration is used to indicate that the second device does not occupy the first channel within the first duration, and the spectrum where the first channel is located is an unlicensed spectrum, and the second device is a device that communicates through the WiFi system.

[0054] Among them, the specific implementation method of the third device can refer to the behavioral function of the third device in the heterosystem interference avoidance method provided by the seventh aspect or any possible design of the seventh aspect. Based on the third device described in the eighth aspect, the first device sends the first information to the third device after broadcasting a WiFi message for indicating that the second device does not occupy the first channel. When the second device does not occupy the first channel, the first device sends the first information to the third device, thereby reducing interference between heterosystems and improving communication reliability between the same systems.

[0055] In one possible design, the third device also includes a processing module, wherein the processing module is used to determine the interference power corresponding to the third device based on the first information; wherein the interference power corresponding to the third device is the difference between the initial interference power determined when the third device performs channel detection and / or idle channel assessment CCA and the interference power corresponding to the WiFi message.

[0056] Based on this possible design, the third device can improve the accuracy of the interference power determined by the third device by removing the interference power corresponding to the WiFi message when determining the interference power corresponding to the third device.

[0057] It should be noted that the relevant descriptions of WiFi messages in the seventh and eighth aspects can refer to the specific descriptions of WiFi messages in the first and second aspects mentioned above, and will not be repeated here.

[0058] In the ninth aspect, an embodiment of the present application provides a third device, which may be a third device or a chip or system on chip in the third device. The third device may implement the functions performed by the third device in the above aspects or possible designs, and the functions may be implemented by hardware. In one possible design, the third device may include: a transceiver. The transceiver may be used to support the third device to implement the functions involved in the above seventh aspect or any possible design of the seventh aspect. For example: the transceiver may be used to receive the first information including service data and / or control information sent by the first device through the first communication system after the first device broadcasts a WiFi message including duration indication information; wherein the first device uses the first communication system for communication, and the first communication system is a sidelink unlicensed SL-U system, a new air interface unlicensed spectrum NR-U system, or a licensed spectrum assisted access LAA system; the duration indication information is used to indicate the first duration, and the first duration is used to indicate that the second device does not occupy the first channel within the first duration, and the spectrum where the first channel is located is an unlicensed spectrum, and the second device is a device for communicating through the WiFi system. In another possible design, the third device may further include a processor and a memory, the memory being used to store computer-executable instructions and data necessary for the third device. When the third device is running, the transceiver and the processor execute the computer-executable instructions stored in the memory, so that the third device performs the heterogeneous system interference avoidance method as described in the seventh aspect or any possible design of the seventh aspect.

[0059] Among them, the specific implementation method of the third device can refer to the behavioral function of the third device in the heterosystem interference avoidance method provided by the seventh aspect or any possible design of the seventh aspect.

[0060] In the tenth aspect, a communication device is provided, which includes one or more processors and one or more memories; the one or more memories are coupled to the one or more processors, and the one or more memories are used to store computer program codes or computer instructions; when the one or more processors execute the computer instructions, the communication device executes the alien system interference avoidance method as described in the first aspect or any possible design of the first aspect, or executes the alien system interference avoidance method as described in the fourth aspect or any possible design of the fourth aspect, or executes the alien system interference avoidance method as described in the seventh aspect or any possible design of the seventh aspect.

[0061] In the eleventh aspect, a computer-readable storage medium is provided, which stores computer instructions or programs. When the computer instructions or programs are executed on a computer, the computer executes the method for avoiding interference from a different system as described in the first aspect or any possible design of the first aspect, or executes the method for avoiding interference from a different system as described in the fourth aspect or any possible design of the fourth aspect, or executes the method for avoiding interference from a different system as described in the seventh aspect or any possible design of the seventh aspect.

[0062] In the twelfth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute the method for avoiding interference from a different system as described in the first aspect or any possible design of the first aspect, or to execute the method for avoiding interference from a different system as described in the fourth aspect or any possible design of the fourth aspect, or to execute the method for avoiding interference from a different system as described in the seventh aspect or any possible design of the seventh aspect.

[0063] In the thirteenth aspect, a chip is provided, comprising a logic circuit and a communication interface; the communication interface is coupled to the logic circuit, and the logic circuit is used to read instructions so that the chip executes the alien system interference avoidance method as described in the first aspect or any possible design of the first aspect, or executes the alien system interference avoidance method as described in the fourth aspect or any possible design of the fourth aspect, or executes the alien system interference avoidance method as described in the seventh aspect or any possible design of the seventh aspect, and the communication interface is used to communicate with other modules outside the chip.

[0064] Among them, the technical effects brought about by any possible design method in the tenth to thirteenth aspects can refer to the technical effects brought about by any possible design of the first to second aspects mentioned above, or refer to the technical effects brought about by any possible design of the fourth to fifth aspects mentioned above, or refer to the technical effects brought about by any possible design of the seventh to eighth aspects mentioned above, and no further details will be given.

[0065] In the fourteenth aspect, a communication system is provided, which includes the first device as described in any aspect of the second to third aspects, the second device as described in any aspect of the fifth to sixth aspects, and the third device as described in any aspect of the eighth to ninth aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1a A schematic diagram of an LAA system occupying unlicensed spectrum in the 5 GHz frequency band provided in an embodiment of the present application;

[0067] Figure 1b A schematic diagram of an LAA system occupying unlicensed spectrum in the 5 GHz frequency band provided in an embodiment of the present application;

[0068] Figure 1c A schematic diagram of an LAA system occupying unlicensed spectrum in the 5 GHz frequency band provided in an embodiment of the present application;

[0069] Figure 1d A schematic diagram of a WiFi system occupying unlicensed spectrum in the 5 GHz frequency band provided in an embodiment of the present application;

[0070] Figure 1e A schematic diagram of a WiFi system occupying channels in the 2.4 GHz frequency band provided in an embodiment of the present application;

[0071] Figure 1f A schematic diagram of the composition of a communication system provided in an embodiment of the present application;

[0072] Figure 2 A schematic diagram of a communication device provided in an embodiment of the present application;

[0073] Figure 3 A flowchart of a method for avoiding interference from a different system provided in an embodiment of the present application;

[0074] Figure 4 A schematic diagram of a WiFi message frame structure provided in an embodiment of the present application;

[0075] Figure 5 A schematic diagram of a frame structure of a physical header provided in an embodiment of the present application;

[0076] Figure 6 A schematic diagram of a CTS frame structure provided in an embodiment of the present application;

[0077] Figure 7 A schematic diagram of a frame structure of a physical header provided in an embodiment of the present application;

[0078] Figure 8 A schematic diagram of a frame structure of an L-SIG field provided in an embodiment of the present application;

[0079] Fig. 9 A flowchart of a method for avoiding interference from a different system provided in an embodiment of the present application;

[0080] Fig.10 A schematic diagram of information transmission provided in an embodiment of the present application;

[0081] Fig.11 A schematic diagram of a frame structure of a first reserved duration provided in an embodiment of the present application;

[0082] Fig.12 A schematic diagram of information receiving provided in an embodiment of the present application;

[0083] Fig.13 A schematic diagram of the composition of a first device provided in an embodiment of the present application;

[0084] Fig.14 A schematic diagram of the composition of a second device provided in an embodiment of the present application;

[0085] Fig.15 A schematic diagram of the composition of a third device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0086] Before describing the embodiments of the present application, the technical terms involved in the embodiments of the present application are described.

[0087] Unlicensed spectrum: that is, open spectrum. All communication systems can use unlicensed spectrum for communication.

[0088] Specifically, communication systems such as sidelink-unlicense (SL-U) system, new radio-unlicense (NR-U) system, licensed assisted access (LAA) system, wireless fidelity (WiFi) system, and Bluetooth system can all use unlicensed spectrum for communication.

[0089] Among them, the LAA system can include fixed wireless access (FWA) system, intelligent transportation system (ITS) and wireless local area network (RLAN).

[0090] For example, the LAA system can occupy unlicensed spectrum in the 5 GHz band as follows: Figure 1a to Figure 1c shown.

[0091] like Figure 1a As shown, for the 5100MHz~5350MHz frequency band, Europe, Israel, Russia, South Africa, Turkey, the United States, Canada, Mexico, China, Japan, India, Singapore and Australia can operate RLANs in the 5150MHz~5350MHz frequency band, Brazil can operate RLANs in the 5250MHz~5350MHz band, and South Korea can operate RLANs in the 5100MHz~5350MHz band.

[0092] like Figure 1b As shown, for the 5470MHz~5725MHz frequency band, Europe, South Africa, Turkey, the United States, Brazil, Japan and Singapore can operate RLANs in the 5470MHz~5725MHz frequency band, Canada, Mexico and Australia can operate RLANs in the 5470MHz~5600MHz and 5650MHz~5725MHz band, South Korea can operate RLANs in the 5470MHz~5650MHz band, and Russia can operate RLANs in the 5650MHz~5725MHz band.

[0093] like Figure 1c As shown, for the 5725MHz~5925MHz frequency band, Europe can operate FWA systems in the 5725MHz~5925MHz frequency band, and can operate ITS systems in the 5850MHz~5925MHz frequency band, Mexico and India can operate RLANs in the 5725MHz~5875MHz frequency band, the United States, Brazil, China, and Singapore can operate RLANs in the 5725MHz~5850MHz frequency band, and Russia, South Korea, and Canada can operate RLANs in the 5725MHz~5825MHz frequency band.

[0094] Among them, the WiFi system can include dynamic frequency selection (DFS), transmit power control (TPC), FWA, ITS, long-term evolution-vehicle (LTE-V) testing, radio positioning and satellite earth detection, etc.

[0095] For example, the WiFi system can occupy the unlicensed spectrum in the 5 GHz band as follows: Figure 1d As shown, the occupied channels in the 2.4 GHz band can be as follows Figure 1e shown.

[0096] like Figure 1dAs shown, for the 5150MHz~5350MHz frequency band, the bandwidth can be 100MHz; for the 5350MHz~5470MHz frequency band, the bandwidth can be 120MHz; for the 5470MHz~5725MHz frequency band, the bandwidth can be 225MHz; for the 5725MHz~5850MHz frequency band, the bandwidth can be 125MHz; for the 5850MHz~5925MHz frequency band, the bandwidth can be 75MHz.

[0097] Specifically, the International Telecommunication Union (ITU) stipulates that the power of RLAN in the 5150MHz~5250MHz frequency band is 200mW indoors; the power in the 5250MHz~5350MHz frequency band is 200mW for dominant indoors; the power in the 5350MHz~5470MHz frequency band is for radio positioning and satellite earth detection; the power in the 5470MHz~5725MHz frequency band is 1W indoors / outdoors. The United States stipulates that in the 5250MHz~5350MHz frequency band, the power of DFS / TPC is 50mW; in the 5350MHz~5470MHz frequency band, radio positioning and satellite earth detection are carried out; in the 5470MHz~5725MHz frequency band, the power of DFS / TPC is 250mW; in the 5725MHz~5850MHz frequency band, the power is 800 / 1000mW; and ITS is operated in the 5850MHz~5925MHz frequency band. China stipulates that in the 5250MHz~5350MHz frequency band, the power of DFS / TPC is 200mW; radio positioning and satellite earth detection are carried out in the 5350MHz~5470MHz frequency band; and LTE-V tests are carried out in the 5905MHz~5925MHz frequency band. Europe stipulates that in the 5250MHz~5350MHz frequency band, the power of DFS / TPC is 200mW; radio positioning and satellite earth detection are carried out in the 5350MHz~5470MHz frequency band; in the 5470MHz~5725MHz frequency band, the power of DFS / TPC is 1W; in the 5725MHz~5795MHz frequency band, the power of FWA is 20mW; and ITS is operated in the 5795MHz~5875MHz frequency band.

[0098] like Figure 1eAs shown, for the 2.4GHz frequency band, 14 channels can be included, each channel includes an effective bandwidth of 20MHz, and a mandatory isolation bandwidth of 2MHz, that is, the bandwidth of each channel is 22MHz. For example, for channel 1 with a center frequency of 2412MHz, its frequency range is 2401MHz to 2423MHz. Since adjacent channels in the 2.4GHz frequency band overlap with each other and there is interference between adjacent channels, non-overlapping channels can be considered for networking applications. For example, China and North America select channels 1, 6, and 11 as non-overlapping channels, and Europe selects channels 1, 7, and 13 as non-overlapping channels.

[0099] Since multiple communication systems can use unlicensed spectrum for communication, there will be interference between different communication systems due to channel occupancy issues. For example, in the 5GHz frequency band, for the SL-U system, the LAA system has less interference to the SL-U system due to industrial issues, while the WiFi system has greater interference to the SL-U system. When the WiFi system occupies the channel for a long time, the SL-U system will not be able to operate normally. Therefore, how to improve the interference between different communication systems on the unlicensed spectrum has become an urgent problem to be solved.

[0100] To solve this problem, an embodiment of the present application provides a method for avoiding interference with a different system, the method comprising: a first device broadcasts a wireless fidelity WiFi message including duration indication information; wherein the first device uses a first communication system for communication, the first communication system being a sidelink unlicensed SL-U system, a new air interface unlicensed spectrum NR-U system, or a licensed spectrum assisted access LAA system; the duration indication information is used to indicate a first duration, the first duration is used to indicate that the second device does not occupy the first channel within the first duration, the spectrum where the first channel is located is an unlicensed spectrum, and the second device is a device for communicating through a WiFi system; the first device sends a first information including service data and / or control information to a third device through the first communication system. In an embodiment of the present application, the first device sends a WiFi message to a second device of a different system to indicate that the second device does not occupy the first channel, so that the second device does not occupy the first channel after receiving the WiFi message. The first device sends the first information to a third device of the same system when the second device does not occupy the first channel, which can reduce interference between different systems and improve communication reliability between the same system.

[0101] The implementation of the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0102] The heterosystem interference avoidance method provided in the embodiment of the present application can be used between a first communication system and a second communication system, and the first communication system and the second communication system can be any two of the following communication systems: sidelink-unlicense (SL-U) system, new radio-unlicense (NR-U) system, licensed assisted access (LAA) system, wireless fidelity (WiFi) system, Bluetooth system, etc., without limitation.

[0103] The heterosystem interference avoidance method provided in the embodiments of the present application can be applied to various communication scenarios, for example, it can be applied to one or more of the following communication scenarios: enhanced mobile broadband (eMBB), ultra-reliable low latency communication (URLLC), machine type communication (MTC), massive machine type communication (mMTC), device to device (D2D), vehicle to everything (V2X), vehicle to vehicle (V2V), and Internet of things (IoT), etc., without limitation.

[0104] Below Figure 1f Taking the example, the heterogeneous system interference avoidance method provided in the embodiment of the present application is described.

[0105] Figure 1f A schematic diagram of a communication system provided in an embodiment of the present application is shown in FIG. Figure 1f As shown, the communication system may include a first communication system and a second communication system, wherein the first communication system may include at least one communication device, and the second communication system may also include at least one communication device.

[0106] Exemplarily, taking the SL-U system as an example, the communication equipment in the SL-U system can conduct sidelink communication or D2D communication with other communication equipment through a sidelink (SL), and send data to other communication equipment on the SL, such as: sending sidelink data to other communication equipment through a physical sidelink share channel (PSSCH) on the SL, sending sidelink feedback control information (SFCI) corresponding to the received sidelink data to other communication equipment through a physical sidelink feedback channel (PSFCH) on the SL, etc. D2D communication can include communication between vehicles, communication between vehicles and pedestrians, communication between vehicles and infrastructure, communication between unmanned aerial vehicles (UAVs) and unmanned aerial vehicles, etc., without limitation. It should be noted that in the embodiments of the present application, SL can also be referred to as a direct link or a PC5 interface link, etc., without limitation.

[0107] In another example, taking a WiFi system as an example, a communication device in the WiFi system can communicate or perform D2D communication with other communication devices via a WiFi link, and send data to other communication devices over the WiFi link.

[0108] in, Figure 1f The communication device in the communication system may be referred to as user equipment (UE) or mobile station (MS) or mobile terminal (MT). Specifically, Figure 1f The communication device in the communication system can be a mobile phone, a tablet computer or a computer with wireless transceiver function. The communication device can also be a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in smart grid, a wireless terminal in smart city, a wireless terminal in smart home, a vehicle terminal, a vehicle with vehicle-to-vehicle (V2V) communication capability, an intelligent networked vehicle, a drone with UAV to UAV (U2U) communication capability, etc., without limitation.

[0109] When implementing it specifically, Figure 1fAs shown, for example, each communication device can use Figure 2 The structure shown, or including Figure 2 Parts shown. Figure 2 The present invention provides a schematic diagram of the composition of a communication device 200, which may be a communication device or a chip or system on chip in the communication device. Figure 2 As shown, the communication device 200 includes a processor 201 , a transceiver 202 and a communication line 203 .

[0110] Furthermore, the communication device 200 may further include a memory 204. The processor 201, the memory 204 and the transceiver 202 may be connected via a communication line 203.

[0111] The processor 201 is a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 201 may also be other devices with processing functions, such as circuits, devices, or software modules, without limitation.

[0112] The transceiver 202 is used to communicate with other devices or other communication networks. The other communication networks may be Ethernet, radio access network (RAN), wireless local area network (WLAN), etc. The transceiver 202 may be a module, a circuit, a transceiver or any device capable of achieving communication.

[0113] The communication line 203 is used to transmit information between the components included in the communication device 200.

[0114] The memory 204 is used to store instructions, where the instructions may be computer programs.

[0115] The memory 204 may be a read-only memory (ROM) or other types of static storage devices that can store static information and / or instructions, or a random access memory (RAM) or other types of dynamic storage devices that can store information and / or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0116] It should be noted that the memory 204 can exist independently of the processor 201, or can be integrated with the processor 201. The memory 204 can be used to store instructions or program codes or some data, etc. The memory 204 can be located in the communication device 200, or can be located outside the communication device 200, without limitation. The processor 201 is used to execute the instructions stored in the memory 204 to implement the heterosystem interference avoidance method provided in the following embodiments of the present application.

[0117] In one example, the processor 201 may include one or more CPUs, such as Figure 2 CPU0 and CPU1 in.

[0118] As an optional implementation, the communication device 200 includes multiple processors, for example, Figure 2 In addition to the processor 201, a processor 207 may also be included.

[0119] As an optional implementation, the communication device 200 further includes an output device 205 and an input device 206. Exemplarily, the input device 206 is a device such as a keyboard, a mouse, a microphone or a joystick, and the output device 205 is a device such as a display screen and a speaker.

[0120] It should be noted that the communication device 200 may be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system or a Figure 2 In addition, Figure 3 The structure shown in the figure does not constitute a limitation on the communication device, except Figure 2 In addition to the components shown, the communication device may include more or fewer components than shown, or combine certain components, or arrange the components differently.

[0121] In the embodiment of the present application, the chip system may be composed of a chip, or may include a chip and other discrete devices.

[0122] In addition, the actions, terms, etc. involved in the various embodiments of the present application can refer to each other without limitation. The message name or parameter name in the message exchanged between the various devices in the embodiments of the present application is only an example, and other names can also be used in the specific implementation without limitation.

[0123] Combine the following Figure 1f The communication system shown in the figure takes the first communication system as the SL-U system and the second communication system as the WiFi system as an example. Figure 3 , the heterogeneous system interference avoidance method provided in the embodiment of the present application is described, wherein the first device can be any communication device in the first communication system, the second device can be any communication device in the second communication system, and the third device can be any communication device in the first communication system except the first device. The first device, the second device, and the third device described in the following embodiments can all have Figure 2 Parts shown.

[0124] Figure 3 A flowchart of a method for avoiding interference from a different system provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the method may include:

[0125] Step 301: The first device broadcasts a WiFi message.

[0126] The WiFi message may include duration indication information, where the duration indication information is used to indicate a first duration, where the first duration is used to indicate that the second device does not occupy the first channel within the first duration, and the spectrum where the first channel is located is an unlicensed spectrum.

[0127] Specifically, the first device uses a WiFi message to instruct the second device not to occupy the first channel within a first period of time, so that the second device can enter a sleep state after parsing the WiFi message, thereby reducing the channel occupancy of the second device and improving the communication reliability of the first communication system.

[0128] In one possible design, the first device broadcasts a WiFi message when it needs to communicate with the third device through the first communication system.

[0129] For example, taking the example that the first device needs to send the first information to the third device through the first communication system, the first device can broadcast a WiFi message before sending the first information to instruct the second device not to occupy the first channel, and when the second device does not occupy the first channel, send the first information to the third device through the first communication system, thereby improving the communication reliability between the first device and the third device.

[0130] The first information may include service data and / or control information.

[0131] Specifically, the first device may determine the first duration by itself, or may determine the first duration according to the transmission duration of the first information, without limitation.

[0132] The first duration may be greater than or equal to the transmission duration of the first information.

[0133] Optionally, the first device instructs the second device through a WiFi message not to occupy all channels corresponding to the unlicensed spectrum, that is, the first channel is all channels corresponding to the unlicensed spectrum.

[0134] Optionally, the first device instructs the second device through a WiFi message not to occupy part of the channels corresponding to the unlicensed spectrum, that is, the first channel is part of the channels corresponding to the unlicensed spectrum.

[0135] Exemplarily, when the first channel is a partial channel corresponding to the unlicensed spectrum, the WiFi message may further include a channel identifier of the first channel.

[0136] Specifically, the first device can determine the first channel to be used when the first device communicates with the third device according to its own communication needs, and carry the channel identifier of the first channel in the WiFi message, so that the second device determines the first channel according to the channel identifier and does not occupy the first channel within a first time period, thereby reducing the interference of the second device to the first communication system and improving the communication reliability of the first communication system.

[0137] Among them, the communication requirements can be one or more of the following: transmission delay requirements, channel environment requirements, communication reliability requirements, business data type, etc., without limitation.

[0138] The channel identifier of the first channel may be a channel number, a center frequency, or the like, which is used to indicate an identifier of the first channel.

[0139] For example, taking the unlicensed spectrum corresponding to channel 1, channel 2 and channel 3 as an example, assuming that the first device determines according to its own communication needs that channel 2 or channel 3 must be used when communicating with the third device, the first device can carry the channel identifiers of channel 2 and channel 3 in the WiFi message, so that the second device does not occupy channel 2 and channel 3 according to the WiFi message, thereby improving the success rate of the first device occupying channel 2 or channel 3 to communicate with the third device, thereby improving the communication quality of the first communication system.

[0140] In another possible design, the first device is a master control device of the first communication system, and when other communication devices of the first communication system need to communicate with each other, the first device broadcasts a WiFi message.

[0141] Exemplarily, taking the case where the first communication system includes a fourth device and a fifth device, and the fourth device needs to communicate with the fifth device, the fourth device can send indication information to the first device to indicate that the fourth device needs to occupy a channel for communication. The first device broadcasts a WiFi message based on the indication information to instruct the second device not to occupy the first channel, thereby improving the success rate of the fourth device in occupying the channel and improving the communication reliability between the fourth device and the fifth device.

[0142] Among them, the first device can determine the first duration by itself, or determine the first duration according to the communication duration requirement of the fourth device and the fifth device, without restriction.

[0143] Specifically, taking the example of the fourth device sending the second information to the fifth device, the fourth device may indicate the transmission duration of the second information to the first device, so that the first device determines the first duration according to the transmission duration of the second information. The fourth device may also determine the first duration according to the transmission duration of the second information, and send the first duration to the first device, so that the first device determines the WiFi message according to the first duration. The first duration may be greater than or equal to the transmission duration of the second information.

[0144] Optionally, the first device instructs the second device through a WiFi message not to occupy all channels corresponding to the unlicensed spectrum, that is, the first channel is all channels corresponding to the unlicensed spectrum.

[0145] Optionally, the first device instructs the second device through a WiFi message not to occupy part of the channels corresponding to the unlicensed spectrum, that is, the first channel is part of the channels corresponding to the unlicensed spectrum.

[0146] Exemplarily, when the first channel is a partial channel corresponding to the unlicensed spectrum, the WiFi message may further include a channel identifier of the first channel.

[0147] Specifically, the first device can determine the first channel to be used when the fourth device communicates with the fifth device according to the communication requirements of the fourth device and the fifth device, and carry the channel identifier of the first channel in the WiFi message, so that the second device determines the first channel according to the channel identifier and does not occupy the first channel within the first time period, thereby reducing the second device's interference with the first communication system and improving the communication reliability of the first communication system. Alternatively, the fourth device can also determine the first channel to be used when the fourth device communicates with the fifth device according to the communication requirements of the fourth device and the fifth device, and send the channel identifier of the first channel to the first device, so that the first device broadcasts the first channel by carrying the channel identifier of the first channel in the WiFi message.

[0148] Among them, the communication requirements can be one or more of the following: transmission delay requirements, channel environment requirements, communication reliability requirements, business data type, etc., without limitation.

[0149] The channel identifier of the first channel may be a channel number, a center frequency, or the like, which is used to indicate an identifier of the first channel.

[0150] For example, taking channels 1, 2 and 3 corresponding to the unlicensed spectrum as an example, assuming that the first device determines that the first channel to be used when the fourth device communicates with the fifth device is channel 2 or channel 3 based on the communication requirements of the fourth device and the fifth device, the first device can carry the channel identifiers of channel 2 and channel 3 in the WiFi message so that the second device does not occupy channel 2 and channel 3 according to the WiFi message, thereby improving the success rate of the fourth device occupying channel 2 or channel 3 to communicate with the fifth device, thereby improving the communication quality of the first communication system.

[0151] For another example, taking channels 1, 2, and 3 corresponding to the unlicensed spectrum as an example, assuming that the fourth device determines that the first channel to be used when the fourth device communicates with the fifth device is channel 2 or channel 3 based on the communication requirements of the fourth device and the fifth device, the fourth device can send the channel identifiers of channel 2 and channel 3 to the first device, so that the first device carries the channel identifiers of channel 2 and channel 3 in the WiFi message, so that the second device does not occupy channel 2 and channel 3 according to the WiFi message, thereby improving the success rate of the fourth device occupying channel 2 or channel 3 to communicate with the fifth device, thereby improving the communication quality of the first communication system.

[0152] Exemplarily, the frame structure of the WiFi message can be Figure 4 The frame structure shown in the figure, wherein the frame structure may include a physical header and a media access control (MAC) frame; the physical header may include a legacy short training field (L-STF) with a duration of 8 μs, a legacy long training field (L-LTF) with a duration of 8 μs, and a legacy signal field (L-SIG) with a duration of 4 μs; the MAC frame may include a MAC frame header (MAC Header) field, a data field, and a frame check sequence (FCS) field.

[0153] Specifically, Figure 5As shown, the L-STF field may include 10 fields with a duration of 0.8 μs; the L-LTF field may include 2 guard interval (GI) fields with a duration of 0.8 μs, a T1 field with a duration of 3.2 μs, and a T2 field with a duration of 3.2 μs. The L-SIG field may include a GI field with a duration of 0.8 μs and a signal (SIGNAL) field with a duration of 3.2 μs.

[0154] Among them, the first 7 fields of the L-STF field can be used for signal detection, automatic gain control (AGC), and diversity selection, and the last 3 fields of the L-STF field can be used for coarse frequency offset estimation timing synchronization to facilitate WiFi system synchronization. The L-LTF field can be used for channel and fine frequency offset estimation, and carries indication information that is convenient for the receiving device to decode. The L-SIG field can be used to indicate the rate and length.

[0155] Exemplarily, the duration indication information may indicate the first duration in the form of a display indication.

[0156] For example, Figure 6 As shown, taking the WiFi message including a clear to send (CTS) frame with a duration of 24 μs as an example, the CTS frame may include a frame control field, a duration (duration / ID) field, a routing area (RA) field, and an FCS field, wherein the duration field may include 16 bits, and the routing area field may be used to indicate the MAC address of the first device. The first device may indicate the first duration through the duration field.

[0157] Specifically, after determining the first duration, the first device can fill in the first duration in the 0th to 14th bits of the duration field, and set the 15th bit to 0, so that after the second device receives the WiFi message, it will not occupy the channel within the first duration indicated in the duration field.

[0158] It should be noted that the duration field in the CTS frame can be used to indicate 0 to 32767 μs, that is, the first device can determine any value in the range of 0 to 32767 μs as the first duration.

[0159] In another example, the duration indication information may also indicate the first duration in an implicit manner.

[0160] For example, Figure 7 As shown, taking the WiFi message including only a 20 μs physical header as an example, the first device can indicate the first duration through the rate and length in the L-SIG field. Figure 8 As shown, the L-SIG field may include a 4-bit rate field, a 12-bit length field, and a 6-bit tail field. The rate field corresponds to the modulation and coding scheme (MCS) used for data transmission. The length field is used to indicate the length of the WiFi message. The first duration = length / rate.

[0161] The rate may be the lowest rate, such as a 1 / 2 code rate using a binary phase shift keying (BPSK) mechanism; and the length may be a maximum length of 12 bits.

[0162] For example, taking the rate as the minimum rate of 6 Mbps and the length as 12 bits as an example, the first device can indicate that the first duration is 5.46 ms through the rate and length in the physical header.

[0163] It should be noted that the first device may send the WiFi message to the second device in a broadcast manner, or in a unicast or multicast manner, without limitation.

[0164] Further, such as Fig. 9 As shown, before executing step 301, the first device may further execute step 301a.

[0165] Step 301a: The first device determines whether the measured interference power meets a preset threshold. If yes, the above step 301 is executed.

[0166] Specifically, the first device may perform channel detection and / or clear channel assessment (CCA) to measure interference power before broadcasting the WiFi message, and send the WiFi message to the second device in broadcast form when the interference power meets a preset threshold, thereby avoiding the first device from frequently sending WiFi messages to the second device, avoiding the second device from being unable to communicate normally due to frequent receipt of WiFi messages, and improving the communication reliability of the first communication system while ensuring that the second communication system can operate normally.

[0167] Optional, such as Fig.10As shown, before sending a WiFi message to the second device, the first device performs a listen before talk (LBT) mechanism, and measures the interference power by performing channel detection and / or CCA.

[0168] Optionally, the preset threshold is a preset interference power.

[0169] Specifically, after measuring the interference power, the first device may send a WiFi message to the second device in a broadcasting form when the interference power is greater than or equal to a preset interference power.

[0170] Alternatively, the preset threshold is a preset interference ratio.

[0171] Specifically, the first device may measure the interference power multiple times, and send a WiFi message to the second device when the ratio of the number of times the interference power is greater than a preset threshold to the total number of interference power measurements is greater than or equal to a preset interference ratio.

[0172] For example, taking the total number of interference power measurements performed by the first device as 10 times and the preset interference ratio as 0.6, assuming that the number of times the interference power is greater than the preset threshold is 9 times, it can be determined that the ratio of the number of times the interference power is greater than the preset threshold to the total number of interference power measurements is 0.9. If the ratio is greater than 0.6, the first device can send a WiFi message to the second device.

[0173] It should be noted that the above-mentioned preset thresholds and preset thresholds may be pre-defined by the communication protocol or pre-configured by the network device, and are not limited.

[0174] In one possible design, the first device periodically measures the interference power.

[0175] Exemplarily, the first device may measure the interference power based on a period customized by the first device.

[0176] For example, the period for the first device to measure the interference power may be 5 ms, 10 ms, 20 ms, etc.

[0177] In yet another example, the first device may also perform interference power measurement within a preconfigured period of time.

[0178] For example, the first device may perform interference power measurement at T={0ms, 5ms, 10ms, 20ms, 40ms, 80ms, 160ms, 320ms}.

[0179] In yet another possible design, the first device measures the interference power non-periodically.

[0180] Exemplarily, the first device may perform interference power measurement when the communication performance of the first device is poor.

[0181] For example, the first device may perform interference power measurement when it cannot seize the channel within a preset time; or the first device may perform interference power measurement when the number of communication failures exceeds a preset number of failures, etc., without restriction.

[0182] Further, when the first device determines that the interference power meets the preset threshold, the first device may determine that it is necessary to send a WiFi message to the second device in a broadcast form, and send the WiFi message to the second device in a broadcast form after the second reserved time.

[0183] The second reserved duration may be greater than or equal to the second switching delay; the second switching delay is the delay required for the first device to switch to sending a WiFi message in a broadcast form.

[0184] Exemplarily, the second switching delay may be a scheduling delay corresponding to resources scheduled by the first device for sending a WiFi message in a broadcast form.

[0185] Step 302: The second device does not occupy the first channel according to the WiFi message.

[0186] Specifically, after receiving the WiFi message sent by the first device, the second device may not occupy the first channel within a first time period according to the WiFi message.

[0187] Among them, when the second device does not occupy the channel, the second device can stop occupying the channel based on the WiFi message, or it can also be described as the second device stopping the channel competition. When the second device has occupied the channel, the second device can release the occupied channel based on the WiFi message. Thereby improving the success rate of the communication device of the first communication system to seize the channel and improving the communication reliability of the first communication system.

[0188] For example, Fig.10 As shown, after receiving the WiFi message sent by the first device, the second device can parse the WiFi message, and according to the parsed WiFi message, not occupy the first channel within the first time period, or it can also be described as entering a sleep state within the first time period.

[0189] Step 303: The first device sends first information to the third device.

[0190] The first information may include service data and / or control information.

[0191] Specifically, when the first device needs to communicate with the third device, the first device can send a WiFi message to the second device in a broadcast form, instructing the second device not to occupy the first channel, and send the first information to the third device when the second device does not occupy the first channel, thereby improving the communication reliability between the first device and the third device.

[0192] Optionally, the first information is also used to instruct the first device to broadcast a WiFi message.

[0193] Specifically, taking the first device as the master control device of the first communication system as an example, when the third device of the first communication system needs to communicate with the remaining communication devices, the first device can send a WiFi message to the second device in a broadcast form to instruct the second device not to occupy the first channel within a first time period, and send the first information used to indicate that the first device has broadcast the WiFi message to the third device, so that the third device can communicate with the remaining communication devices when the second device does not occupy the first channel, thereby improving the communication reliability of the third device.

[0194] Optionally, the first information is also used to indicate the time and frequency resources of the WiFi message.

[0195] Among them, the time-frequency resources of the WiFi message can be used to indicate the time domain resources and frequency domain resources corresponding to the WiFi message.

[0196] Specifically, since the WiFi message is actually sent by the first device located in the same communication system as the third device, not the second device, when the third device measures the interference power, it can determine the interference power corresponding to the WiFi message based on the time-frequency resources of the WiFi message, and remove the interference power corresponding to the WiFi message from the measured initial interference power, thereby improving the accuracy of the interference power determined by the third device.

[0197] Exemplarily, the first device can carry the first information in sidelink control information (SCI) signaling, MAC control unit (media access control control element, MAC CE) signaling or radio resource control (radio resource control, RRC) signaling and send it to the third device without restriction.

[0198] Optionally, when the first device executes the above step 301, it executes the above step 303 after the first reserved time, that is, when the first device broadcasts a WiFi message, it sends the first information to the third device after the first reserved time.

[0199] The first reserved duration may be greater than or equal to the sum of the transmission duration of the WiFi message and the first switching delay; the first switching delay is the delay required for the first device to switch from broadcasting the WiFi message to sending the first information.

[0200] Specifically, the first switching delay may be a scheduling delay for resource scheduling when the first device switches from broadcasting a WiFi message to sending the first information.

[0201] Exemplarily, when the first device is a load based equipment (LBE), the first reserved duration may be equal to the sum of the transmission duration of the WiFi message and the first switching delay.

[0202] Among them, when the first device is in the LBE mode, when sending a WiFi message to the second device, the first device can send the first information to the third device after the transmission time of the WiFi message and the first switching delay.

[0203] In another example, when the first device is a frame based equipment (FBE), the first reserved duration may be greater than the sum of the transmission duration of the WiFi message and the first switching delay.

[0204] When the first device is in the FBE mode, the first device may send a WiFi message and the first information based on a preset minimum transmission unit.

[0205] Specifically, when the first device needs to send a WiFi message to the second device, the first device can send the WiFi message to the second device based on the minimum transmission unit, and after the transmission time of the WiFi message and the first switching delay, send the first information to the third device based on the next minimum transmission unit.

[0206] For example, Fig.11 As shown, taking the minimum transmission unit T3 as an example, the first reserved duration T=T1+T2+T4; wherein, T4=[fix((T1+T2) / T3)+1]*T3-(T1+T2); the fix function is a quotient function, T1 is the transmission duration of the WiFi message; and T2 is the first switching delay.

[0207] It should be noted that the first switching delay may be pre-defined by the communication protocol or pre-configured by the network device, without limitation.

[0208] The first switching delay may be within 100 microseconds. Optionally, the first switching delay is 0.

[0209] Based on the above Figure 3In the method shown, the first device sends a WiFi message to the second device of the different system to indicate that the second device does not occupy the first channel, so that the second device does not occupy the first channel after receiving the WiFi message. The first device sends the first information to the third device of the same system when the second device does not occupy the first channel, which can reduce interference between different systems and improve communication reliability between the same system.

[0210] Based on the above Figure 3 After receiving the first information sent by the first device, the third device can also execute Fig.10 In step 304, the accuracy of the third device in determining the interference power is improved.

[0211] Step 304: The third device determines the interference power corresponding to the third device according to the first information.

[0212] The interference power corresponding to the third device is the difference between the initial interference power determined when the third device performs channel detection and / or idle channel assessment CCA and the interference power corresponding to the WiFi message.

[0213] Specifically, for a non-transparent communication scenario, when the first device sends a WiFi message in broadcast form, the third device can also receive the WiFi message, but since the WiFi message is actually sent by the first device, when the third device determines the interference power corresponding to the third device, it can remove the interference power corresponding to the WiFi message from the measured initial interference power.

[0214] For example, Fig.12 As shown, the third device can determine the time-frequency resources of the WiFi message based on the first information, determine the interference power corresponding to the WiFi message based on the time-frequency resources of the WiFi message, and determine the difference between the initial interference power determined when the third device performs channel detection and / or idle channel assessment CCA and the interference power corresponding to the WiFi message as the interference power corresponding to the third device.

[0215] Above Figures 3 to 12 Taking the first communication system as an SL-U system and the second communication system as a WiFi system as an example, the heterogeneous system interference avoidance method provided in the embodiment of the present application is described in detail. Similarly, when the first communication system is an NR-U / LAA system and the second communication system is a wireless fidelity WiFi system; or the first communication system is an SL-U system and the second communication system is a Bluetooth system; or the first communication system is a Bluetooth system and the second communication system is a WiFi system, the communication devices of the first communication system can all refer to the functions performed by the above-mentioned first device or third device, and the communication devices of the second communication system can refer to the functions performed by the above-mentioned second device, thereby improving the heterogeneous system interference between the various communication systems.

[0216] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between devices. It is understandable that, in order to realize the above functions, each device includes a hardware structure and / or software module corresponding to each function. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present application.

[0217] The embodiment of the present application can divide the functional modules of each device according to the above method example. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0218] In the case of dividing each functional module into corresponding functional modules, Fig.13 A first device is shown, and the first device 130 may include a transceiver module 1301 and a processing module 1302. Exemplarily, the first device 130 may be a first device, or may be a chip applied to the first device or other combined devices, components, etc. having the functions of the first device described above. When the first device 130 is a first device, the transceiver module 1301 may be a transceiver, and the transceiver may include an antenna and a radio frequency circuit, etc., and the processing module 1302 may be a processor (or a processing circuit), such as a baseband processor, and the baseband processor may include one or more CPUs. When the first device 130 is a component having the functions of the first device described above, the transceiver module 1301 may be a radio frequency unit, and the processing module 1302 may be a processor (or a processing circuit), such as a baseband processor. When the first device 130 is a chip system, the transceiver module 1301 may be an input and output interface of a chip (such as a baseband chip), and the processing module 1302 may be a processor (or a processing circuit) of the chip system, and may include one or more central processing units. It should be understood that the transceiver module 1301 in the embodiment of the present application can be implemented by a transceiver or a transceiver-related circuit component, and the processing module 1302 can be implemented by a processor or a processor-related circuit component (or, referred to as a processing circuit).

[0219] For example, the transceiver module 1301 can be used to perform Figure 3 All transceiver operations performed by the first device in the illustrated embodiment, and / or other processes used to support the technology described herein. The processing module 1302 may be used to perform Figure 3 All operations except the sending and receiving operations are performed by the first device in the illustrated embodiment, and / or other processes for supporting the technology described herein.

[0220] Specifically, the transceiver module 1301 is used to broadcast a wireless fidelity WiFi message including duration indication information; the duration indication information is used to indicate a first duration, and the first duration is used to indicate that the second device does not occupy the first channel within the first duration, the spectrum where the first channel is located is an unlicensed spectrum, and the second device is a device that communicates through the WiFi system; the transceiver module 1301 is also used to send first information including business data and / or control information to a third device through the first communication system.

[0221] In one possible design, the first duration is greater than or equal to the transmission duration of the first information.

[0222] In one possible design, the first device also includes a processing module 1302, wherein the processing module 1302 is used to perform channel detection and / or idle channel assessment CCA, and measure interference power; when the interference power meets a preset threshold, the transceiver module 1301 broadcasts a WiFi message.

[0223] In one possible design, the first information is also used to instruct the first device to broadcast a WiFi message.

[0224] In one possible design, the first information is used to indicate the time and frequency resources of the WiFi message.

[0225] In one possible design, the transceiver module 1301 is also used to send the first information to the third device after the first reserved time period after broadcasting the WiFi message.

[0226] In one possible design, the first reserved duration is greater than or equal to the sum of the transmission duration of the WiFi message and the first switching delay; wherein the first switching delay is the delay required for the first device to switch from broadcasting the WiFi message to sending the first information.

[0227] In one possible design, after the processing module 1302 determines to broadcast a WiFi message, the transceiver module 1301 sends a WiFi message to the second device after a second reserved time.

[0228] In one possible design, the second reserved time duration is greater than or equal to the second switching delay; wherein the second switching delay is the delay required for the first device to switch to sending a WiFi message.

[0229] As another possible way to achieve this, Fig.13 The transceiver module 1301 in the embodiment may be replaced by a transceiver, and the transceiver may integrate the functions of the transceiver module 1301; the processing module 1302 may be replaced by a processor, and the processor may integrate the functions of the processing module 1302. Further, Fig.13 The first device 130 shown may also include a memory. When the transceiver module 1301 is replaced by a transceiver and the processing module 1302 is replaced by a processor, the first device 130 involved in the embodiment of the present application may be Figure 2 The communication device shown.

[0230] In the case of dividing each functional module into corresponding functional modules, Fig.14 A second device is shown, and the second device 140 may include a transceiver module 1401 and a processing module 1402. Exemplarily, the second device 140 may be a second device, or may be a chip applied to the second device or other combined devices, components, etc. having the above-mentioned second device function. When the second device 140 is a second device, the transceiver module 1401 may be a transceiver, and the transceiver may include an antenna and a radio frequency circuit, etc., and the processing module 1402 may be a processor (or a processing circuit), such as a baseband processor, and the baseband processor may include one or more CPUs. When the second device 140 is a component having the above-mentioned second device function, the transceiver module 1401 may be a radio frequency unit, and the processing module 1402 may be a processor (or a processing circuit), such as a baseband processor. When the second device 140 is a chip system, the transceiver module 1401 may be an input and output interface of a chip (such as a baseband chip), and the processing module 1402 may be a processor (or a processing circuit) of the chip system, and may include one or more central processing units. It should be understood that the transceiver module 1401 in the embodiment of the present application can be implemented by a transceiver or a transceiver-related circuit component, and the processing module 1402 can be implemented by a processor or a processor-related circuit component (or, referred to as a processing circuit).

[0231] For example, the transceiver module 1401 can be used to perform Figure 3 All transceiver operations performed by the second device in the illustrated embodiment, and / or other processes used to support the technology described herein. The processing module 1402 may be used to perform Figure 3 All operations except the transceiver operations performed by the second device in the illustrated embodiment, and / or other processes for supporting the technology described herein.

[0232] Specifically, the transceiver module 1401 is used to obtain a WiFi message including duration indication information from the first device; wherein the second device is a device that communicates through the WiFi system; the first device uses the first communication system to communicate, and the first communication system is a sidelink unlicensed SL-U system, a new air interface unlicensed spectrum NR-U system, or a licensed spectrum assisted access LAA system; the duration indication information is used to indicate a first duration, and the first duration is used to indicate that the second device does not occupy the first channel within the first duration, and the spectrum where the first channel is located is an unlicensed spectrum; the processing module 1402 is used to not occupy the first channel within the first duration according to the WiFi message.

[0233] As another possible way to achieve this, Fig.14 The transceiver module 1401 in the embodiment may be replaced by a transceiver, and the transceiver may integrate the functions of the transceiver module 1401; the processing module 1402 may be replaced by a processor, and the processor may integrate the functions of the processing module 1402. Further, Fig.14 The second device 140 shown may also include a memory. When the transceiver module 1401 is replaced by a transceiver and the processing module 1402 is replaced by a processor, the second device 140 involved in the embodiment of the present application may be Figure 2 The communication device shown.

[0234] In the case of dividing each functional module into corresponding functional modules, Fig.15 A third device is shown, and the third device 150 may include a transceiver module 1501 and a processing module 1502. Exemplarily, the third device 150 may be a third device, or may be a chip applied to the third device or other combined devices, components, etc. having the functions of the third device. When the third device 150 is a third device, the transceiver module 1501 may be a transceiver, and the transceiver may include an antenna and a radio frequency circuit, etc., and the processing module 1502 may be a processor (or a processing circuit), such as a baseband processor, and the baseband processor may include one or more CPUs. When the third device 150 is a component having the functions of the third device, the transceiver module 1501 may be a radio frequency unit, and the processing module 1502 may be a processor (or a processing circuit), such as a baseband processor. When the third device 150 is a chip system, the transceiver module 1501 may be an input and output interface of a chip (such as a baseband chip), and the processing module 1502 may be a processor (or a processing circuit) of the chip system, and may include one or more central processing units. It should be understood that the transceiver module 1501 in the embodiment of the present application can be implemented by a transceiver or a transceiver-related circuit component, and the processing module 1502 can be implemented by a processor or a processor-related circuit component (or, referred to as a processing circuit).

[0235] For example, the transceiver module 1501 can be used to perform Figure 3 All transceiver operations performed by the third device in the illustrated embodiment, and / or other processes used to support the technology described herein. The processing module 1502 may be used to perform Figure 3 All operations except the transceiver operations are performed by the third device in the illustrated embodiment, and / or other processes for supporting the technology described herein.

[0236] Specifically, the transceiver module 1501 is used to receive first information including business data and / or control information sent by the first device through the first communication system after the first device broadcasts a WiFi message including duration indication information; wherein the first device uses the first communication system to communicate, and the first communication system is a sidelink unlicensed SL-U system, a new air interface unlicensed spectrum NR-U system, or a licensed spectrum assisted access LAA system; the duration indication information is used to indicate a first duration, and the first duration is used to indicate that the second device does not occupy the first channel within the first duration, the spectrum where the first channel is located is an unlicensed spectrum, and the second device is a device that communicates through the WiFi system.

[0237] In one possible design, the processing module 1502 is used to determine the interference power corresponding to the third device based on the first information; wherein the interference power corresponding to the third device is the difference between the initial interference power determined when the third device performs channel detection and / or idle channel assessment CCA and the interference power corresponding to the WiFi message.

[0238] As another possible way to achieve this, Fig.15 The transceiver module 1501 in the embodiment can be replaced by a transceiver, and the transceiver can integrate the functions of the transceiver module 1501; the processing module 1502 can be replaced by a processor, and the processor can integrate the functions of the processing module 1502. Further, Fig.15 The third device 150 shown may also include a memory. When the transceiver module 1501 is replaced by a transceiver and the processing module 1502 is replaced by a processor, the third device 150 involved in the embodiment of the present application may be Figure 2 The communication device shown.

[0239] The embodiment of the present application also provides a computer-readable storage medium. All or part of the processes in the above method embodiments can be completed by a computer program to instruct the relevant hardware, and the program can be stored in the above computer-readable storage medium. When the program is executed, it may include the processes of the above method embodiments. The computer-readable storage medium can be an internal storage unit of a terminal (including a data sending end and / or a data receiving end) in any of the above embodiments, such as a hard disk or memory of the terminal. The above computer-readable storage medium can also be an external storage device of the above terminal, such as a plug-in hard disk equipped on the above terminal, a smart memory card (smart media card, SMC), a secure digital (secure digital, SD) card, a flash card (flash card), etc. Further, the above computer-readable storage medium can also include both an internal storage unit of the above terminal and an external storage device. The above computer-readable storage medium is used to store the above computer program and other programs and data required by the above terminal. The above computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.

[0240] It should be noted that the terms "first" and "second" in the specification, claims and drawings of the present application are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0241] It should be understood that in the present application, "at least one (item)" means one or more, "more than one" means two or more, "at least two (items)" means two or three and more than three, and "and / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: 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.

[0242] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0243] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0244] The units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0245] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0246] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium, including several instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks or optical disks.

[0247] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application shall be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for avoiding interference from a different system, characterized in that: The method is applied to a first device, the first device uses a first communication system for communication, the first communication system is a sidelink unlicensed SL-U system, a new radio unlicensed spectrum NR-U system, or a licensed spectrum assisted access LAA system; the method includes: The first device broadcasts a wireless fidelity WiFi message; wherein the WiFi message includes duration indication information, the duration indication information is used to indicate a first duration, the first duration is used to indicate that the second device does not occupy a first channel within the first duration, the spectrum where the first channel is located is an unlicensed spectrum, and the second device is a device that communicates through a WiFi system; The first device sends first information to a third device through the first communication system; wherein the first information includes service data and / or control information.

2. The method according to claim 1, characterized in that The first duration is greater than or equal to a transmission duration of the first information.

3. The method according to claim 1 or 2, characterized in that: The method further comprises: The first device performs channel detection and / or idle channel assessment CCA, and measures interference power; When the interference power meets a preset threshold, the first device broadcasts the WiFi message.

4. The method according to claim 1 or 2, characterized in that: The first information is also used to instruct the first device to broadcast the WiFi message.

5. The method according to claim 1 or 2, characterized in that: The first information is used to indicate the time-frequency resources of the WiFi message.

6. The method according to claim 1 or 2, characterized in that: The first device sending the first information to the third device includes: After the first device broadcasts the WiFi message, the first device sends the first information to the third device after a first reserved time.

7. The method according to claim 6, characterized in that The first reserved duration is greater than or equal to the sum of the transmission duration of the WiFi message and the first switching delay; wherein the first switching delay is the delay required for the first device to switch from broadcasting WiFi messages to sending first information.

8. The method according to claim 1 or 2, characterized in that: The first device broadcasts the WiFi message, including: When the first device determines to broadcast the WiFi message, the first device broadcasts the WiFi message after a second reserved time.

9. The method according to claim 8, characterized in that The second reserved time length is greater than or equal to a second switching delay; wherein the second switching delay is the delay required for the first device to switch to broadcasting a WiFi message.

10. A method for avoiding interference from a different system, characterized in that: include: A first device broadcasts a wireless fidelity WiFi message; wherein the first device uses a first communication system for communication, and the first communication system is a sidelink unlicensed SL-U system, a new radio unlicensed spectrum NR-U system, or a licensed spectrum assisted access LAA system; the WiFi message includes duration indication information, and the duration indication information is used to indicate a first duration, and the first duration is used to indicate that the second device does not occupy a first channel within the first duration, and the spectrum where the first channel is located is an unlicensed spectrum, and the second device is a device that communicates through the WiFi system; The second device obtains the WiFi message; The first device sends first information to a third device through the first communication system; wherein the first information includes service data and / or control information; The third device receives the first information from the first device.

11. The method according to claim 10, characterized in that The first duration is greater than or equal to a transmission duration of the first information.

12. The method according to claim 10 or 11, characterized in that: The method further comprises: The first device performs channel detection and / or idle channel assessment CCA, and measures interference power; When the interference power meets a preset threshold, the first device broadcasts the WiFi message.

13. The method according to claim 10 or 11, characterized in that: The first information is also used to instruct the first device to broadcast the WiFi message.

14. The method according to claim 10 or 11, characterized in that: The first information is used to indicate the time-frequency resources of the WiFi message.

15. The method according to claim 10 or 11, characterized in that: The first device sending the first information to the third device includes: After the first device broadcasts the WiFi message, the first device sends the first information to the third device after a first reserved time.

16. The method according to claim 15, characterized in that The first reserved duration is greater than or equal to the sum of the transmission duration of the WiFi message and the first switching delay; wherein the first switching delay is the delay required for the first device to switch from broadcasting WiFi messages to sending first information.

17. The method according to claim 10 or 11, characterized in that: The first device broadcasts the WiFi message, including: When the first device determines to broadcast the WiFi message, the first device broadcasts the WiFi message after a second reserved time.

18. The method according to claim 17, characterized in that The second reserved time length is greater than or equal to a second switching delay; wherein the second switching delay is the delay required for the first device to switch to broadcasting a WiFi message.

19. The method according to claim 10 or 11, characterized in that: The method further comprises: The second device does not occupy the first channel within the first duration according to the WiFi message.

20. The method according to claim 10 or 11, characterized in that The third device determines the interference power corresponding to the third device based on the first information; wherein the interference power corresponding to the third device is the difference between the initial interference power determined when the third device performs channel detection and / or idle channel assessment CCA and the interference power corresponding to the WiFi message.

21. A first device, characterized in that: The first device includes one or more processors and transceivers; the one or more processors and the transceiver support the first device to execute the heterosystem interference avoidance method as described in any one of claims 1-9, or execute the actions performed by the first device in the heterosystem interference avoidance method as described in any one of claims 10-20.

22. A first device, characterized in that: include: At least one processor and a memory, the processor and the memory are coupled, the memory stores program instructions, and when the program instructions stored in the memory are executed by the processor, the first device executes the heterogeneous system interference avoidance method as described in any one of claims 1-9, or executes the actions performed by the first device in the heterogeneous system interference avoidance method as described in any one of claims 10-20.

23. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions or programs. When the computer instructions or programs are executed on a computer, the computer executes the method for avoiding interference from a different system as described in any one of claims 1 to 9, or executes the actions executed by the first device in the method for avoiding interference from a different system as described in any one of claims 10 to 20.

24. A chip, characterized in that: It includes a logic circuit and a communication interface, the communication interface is coupled to the logic circuit, the logic circuit is used to read instructions to execute the heterosystem interference avoidance method as described in any one of claims 1 to 9, or to execute the action performed by the first device in the heterosystem interference avoidance method as described in any one of claims 10 to 20, and the communication interface is used to communicate with other modules outside the chip.

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