Communication method, communication device, communication system, storage medium, and program product

Abstract

Embodiments of the present disclosure relate to a communication method, a communication device, a communication system, a storage medium, and a program product. The communication method may be executed by a first node. The method comprises: monitoring a first downlink signal, the first downlink signal being used for determining whether to transmit a first carrier, and the first carrier being used for a first device to perform backscattering. In the embodiments of the present disclosure, the control of carrier transmission is implemented.

Description

Communication methods, communication equipment, communication systems, storage media and software products Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a communication method, communication device, communication system, storage medium, and program product. Background Technology

[0002] Ambient Internet of Things (AIoT) is a type of Internet of Things (IoT). Compared to cellular-based narrowband Internet of Things (NB-IoT) devices, Ambient-IoT devices are less complex, less expensive, and have lower maintenance costs. Ambient-IoT devices use backscattering technology for communication.

[0003] Summary of the Invention

[0004] For carrier nodes in AIoT, how to control carrier transmission is an urgent problem to be solved.

[0005] This disclosure provides a communication method, communication device, communication system, storage medium, and program product.

[0006] According to a first aspect of the present disclosure, a communication method is proposed, executed by a first node, the method comprising: listening to a first downlink signal, the first downlink signal being used to determine whether to transmit a first carrier, the first carrier being used by a first device for backscattering.

[0007] According to a second aspect of the present disclosure, a communication method is proposed, executed by a third node, the method comprising: sending first information, the first information being used by the first node to determine the configuration of a first carrier, the first carrier being determined by the first node based on a first downlink signal being monitored, and the first carrier being used by a first device for backscattering.

[0008] According to a third aspect of the present disclosure, a communication device, such as a first node, is provided, comprising: a transceiver module configured to listen to a first downlink signal, the first downlink signal being used to determine whether to transmit a first carrier, the first carrier being used by the first device for backscattering.

[0009] According to a fourth aspect of the present disclosure, a communication device, such as a third node, is provided, comprising: a transceiver module configured to transmit first information, the first information being used by the first node to determine the configuration of a first carrier, the first carrier being determined by the first node based on a first downlink signal it has been listening to, and the first carrier being used by the first device to perform backscattering.

[0010] According to a fifth aspect of the present disclosure, a communication method is provided, executed by a communication system, the communication system comprising: a first node and a third node; wherein the method comprises: the third node sending first information to the first node, the first information being used by the first node to determine the configuration of a first carrier, the first carrier being used by a first device to perform backscattering; the first node listening to a first downlink signal, the first downlink signal being used by the first node to determine whether to send the first carrier.

[0011] According to a sixth aspect of the present disclosure, a communication device is provided, comprising: one or more processors; wherein the communication device is configured to perform a communication method as described in the first or second aspect. The communication device may be a first node or a third node.

[0012] According to a seventh aspect of the present disclosure, a communication system is proposed, including a first node and a third node; the first node is configured to implement the communication method as described in the first aspect; and the third node is configured to implement the communication method as described in the second aspect.

[0013] According to an eighth aspect of the embodiments of this disclosure, a computer storage medium is provided that stores instructions, which, when executed on a communication device, cause the communication device to perform the communication method as described in the first or second aspect. The communication device may be a first node or a third node.

[0014] According to a ninth aspect of the present disclosure, a computer program product is provided, including a computer program that, when executed by a processor, implements the communication method of the first or second aspect.

[0015] According to a tenth aspect of the present disclosure, a computer program is provided that includes code, which, when executed by a processor, implements the communication method in the first or second aspect.

[0016] According to an eleventh aspect of the present disclosure, a chip or chip system is provided. The chip or chip system includes processing circuitry. The processing circuitry is configured to perform the communication methods described in the first or second aspect.

[0017] In this embodiment of the disclosure, the first node listens to the first downlink signal. Thus, it can determine whether to send the first carrier to the first device based on the first downlink signal, so that the first device can perform backscattering, thereby realizing control over the carrier transmission. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings required for the description of the embodiments are introduced below. The following drawings are only some embodiments of this disclosure and do not impose specific limitations on the protection scope of this disclosure.

[0019] Figure 1A is a schematic diagram of an architecture of a communication system according to an embodiment of the present disclosure.

[0020] Figure 1B is a schematic diagram of an AIoT architecture shown according to an embodiment of the present disclosure.

[0021] Figure 2A is an interactive schematic diagram of a communication method provided according to an embodiment of the present disclosure.

[0022] Figure 2B is another interactive schematic diagram of the communication method provided according to an embodiment of the present disclosure.

[0023] Figure 2C is another interactive schematic diagram of the communication method provided according to an embodiment of the present disclosure.

[0024] Figure 3A is a schematic diagram of an AIoT topology provided according to an embodiment of the present disclosure.

[0025] Figure 3B is another schematic diagram of an AIoT topology provided according to an embodiment of the present disclosure.

[0026] Figure 3C is a schematic diagram of a first carrier transmission timing provided according to an embodiment of the present disclosure.

[0027] Figure 3D is another schematic diagram of the first carrier transmission timing provided according to an embodiment of the present disclosure.

[0028] Figure 3E is another schematic diagram of the first carrier transmission timing provided according to an embodiment of the present disclosure.

[0029] Figure 4 is a flowchart illustrating a third node execution communication method according to an embodiment of the present disclosure.

[0030] Figure 5A is a schematic flowchart of a first method for performing communication on the first node side according to an embodiment of the present disclosure.

[0031] Figure 5B is a second flowchart illustrating the first node-side communication method provided according to an embodiment of the present disclosure.

[0032] Figure 5C is a third flowchart illustrating the first node-side communication method provided according to an embodiment of the present disclosure.

[0033] Figure 6A is a schematic flowchart illustrating a fourth method for performing communication on the first node side according to an embodiment of the present disclosure.

[0034] Figure 6B is a schematic flowchart illustrating another communication method performed on the third node side according to an embodiment of the present disclosure.

[0035] Figure 7A is a schematic diagram of a communication device according to an embodiment of the present disclosure.

[0036] Figure 7B is a schematic diagram of another structure of a communication device provided according to an embodiment of the present disclosure.

[0037] Figure 8 is a schematic diagram of a chip structure provided according to an embodiment of the present disclosure. Detailed Implementation

[0038] This disclosure provides a communication method, communication device, communication system, storage medium, and program product.

[0039] In a first aspect, embodiments of this disclosure propose a communication method executed by a first node, the method comprising: listening to a first downlink signal, the first downlink signal being used to determine whether to transmit a first carrier, the first carrier being used by a first device for backscattering.

[0040] In this embodiment of the disclosure, the first node listens to the first downlink signal. Thus, it can determine whether to send the first carrier to the first device based on the first downlink signal, so that the first device can perform backscattering, thereby realizing control over the carrier transmission.

[0041] In conjunction with some embodiments of the first aspect, in some embodiments, the first downlink signal is a downlink signal sent by a second node, the second node being associated with the first node; or, the first downlink signal is a downlink signal with a signal strength greater than or equal to a preset value.

[0042] In this embodiment of the disclosure, the first node can listen to certain downlink signals, such as downlink signals sent by the second node or downlink signals with a signal strength greater than or equal to a preset value, so that the first node sends the first carrier after receiving these downlink signals, thereby improving the accuracy of carrier transmission, improving communication efficiency, and enhancing system performance.

[0043] In conjunction with some embodiments of the first aspect, in some embodiments, the reception duration of the first downlink signal is spaced apart from the transmission duration of the first carrier by a first duration.

[0044] In this embodiment of the disclosure, the first node listens to the downlink transmission (such as R2D) between the second node and the first device. After the downlink transmission, there is usually an uplink transmission (such as D2R). When the first node listens to / receives the downlink transmission, the first node can start sending the first carrier after the first downlink signal at a second time interval, so that the first device can perform backscattering. This eliminates the signaling overhead dedicated to controlling the first node, greatly improves the communication efficiency of the entire AIoT system, and reduces the frequency of signaling interaction between air interfaces.

[0045] In conjunction with some embodiments of the first aspect, in some embodiments, the first duration is the interval length between the end time of the reception duration and the start time of the transmission duration.

[0046] In conjunction with some embodiments of the first aspect, in some embodiments, the first duration is greater than or equal to 0.

[0047] In conjunction with some embodiments of the first aspect, in some embodiments, the first duration is greater than or equal to a first preset value, the first preset value being the minimum time interval between the downlink receiving duration and the uplink transmitting duration of the first device, the downlink receiving duration being used for the first device to receive downlink signals, and the uplink transmitting duration being used for the first device to transmit uplink signals.

[0048] In conjunction with some embodiments of the first aspect, in some embodiments, the configuration of the first carrier includes at least one of the following: a second duration, the second duration being the transmission duration of the first carrier; a third duration, the third duration being the interval length between two adjacent transmission durations of the first carrier; a fourth duration, the fourth duration being the interval length between the start time or end time of the reception duration of the first downlink signal and the start time of the transmission duration of the first carrier; a carrier type of the first carrier; the number of transmissions of the first carrier; and the transmission frequency of the first carrier.

[0049] In conjunction with some embodiments of the first aspect, in some embodiments, the carrier type of the first carrier includes at least one of the following: a single-frequency sine wave; a plurality of single-frequency sine waves.

[0050] In conjunction with some embodiments of the first aspect, in some embodiments, the first carrier is a plurality of single-frequency sine waves, and the interval between the transmission frequencies of adjacent sine waves is the same.

[0051] In conjunction with some embodiments of the first aspect, in some embodiments, the transmission frequencies of the multiple single-frequency sine waves are different.

[0052] In conjunction with some embodiments of the first aspect, in some embodiments, the number of times the first carrier is transmitted is N, where N is an integer greater than or equal to 1.

[0053] In conjunction with some embodiments of the first aspect, in some embodiments, the number of times the first carrier is transmitted is N, where N is greater than 1, and the time interval between the N transmitted first carriers is the same.

[0054] In conjunction with some embodiments of the first aspect, in some embodiments, the transmission duration of the first carrier is the duration of the first carrier being transmitted once; or, the transmission duration of the first carrier is the total duration of the first carrier being transmitted N times.

[0055] In conjunction with some embodiments of the first aspect, in some embodiments, the configuration of the first carrier is determined by the first node.

[0056] In conjunction with some embodiments of the first aspect, in some embodiments, the configuration of the first carrier is determined based on the first information sent by the third node.

[0057] In conjunction with some embodiments of the first aspect, in some embodiments, the third node is a network device, and the first information is carried in configuration information sent by the network device; or, the third node is a reader / writer, and the first information is carried in a first downlink signal sent by the reader / writer.

[0058] In conjunction with some embodiments of the first aspect, in some embodiments, the first information includes at least one of the following: first indication information, used to indicate whether to transmit the first carrier; second indication information, used to indicate a fourth duration, the fourth duration being the interval length between the start time or end time of the reception duration of the first downlink signal and the start time of the transmission duration of the first carrier; third indication information, used to indicate the carrier type of the first carrier; fourth indication information, used to indicate the number of transmissions of the first carrier; fifth indication information, used to indicate a second duration, the second duration being the interval length between the transmission durations of two adjacent transmissions of the first carrier; sixth indication information, used to indicate the transmission frequency of the first carrier; and seventh indication information, used to indicate a second duration, the second duration being the transmission duration of the first carrier.

[0059] In conjunction with some embodiments of the first aspect, in some embodiments, the first indication information is located in the first information field of the first downlink signal, the first information field is used to indicate whether to transmit the first carrier, wherein the first indication information with a first value is used to instruct the first node to transmit the first carrier; or, the first indication information with a second value is used to instruct the first node not to transmit the first carrier.

[0060] In conjunction with some embodiments of the first aspect, in some embodiments, the first indication information is located in a second information field in the first downlink signal, the second information field being used to indicate whether the first downlink signal has an associated uplink signal; wherein, the above method further includes: determining to transmit a first carrier when the first indication information indicates that the first uplink signal has an associated downlink signal; and determining not to transmit the first carrier when the first indication information indicates that the first uplink signal does not have an associated downlink signal.

[0061] In conjunction with some embodiments of the first aspect, in some embodiments, the above method further includes: when a first downlink signal is detected, determining whether the first downlink signal has an associated downlink signal based on the downlink instructions included in the first downlink signal; when it is determined that the first uplink signal has an associated downlink signal, determining to transmit a first carrier; when it is determined that the first uplink signal does not have an associated downlink signal, determining not to transmit the first carrier.

[0062] Secondly, this disclosure provides a communication method executed by a first device. The method includes: sending first information, the first information being used by a first node to determine the configuration of a first carrier, the first carrier being determined by the first node based on a first downlink signal it has been listening to, and the first carrier being used by the first device to perform backscattering.

[0063] In conjunction with some embodiments of the second aspect, in some embodiments, the first downlink signal is a downlink signal sent by the second node, which is associated with the first node; or, the first downlink signal is a downlink signal with a signal strength greater than or equal to a preset value.

[0064] In conjunction with some embodiments of the second aspect, in some embodiments, the reception duration of the first downlink signal is spaced apart from the transmission duration of the first carrier by a first duration.

[0065] In conjunction with some embodiments of the second aspect, in some embodiments, the first duration is the interval length between the end time of the reception duration of the first downlink signal and the start time of the transmission duration of the first carrier.

[0066] In conjunction with some embodiments of the second aspect, in some embodiments, the first duration is greater than or equal to 0.

[0067] In conjunction with some embodiments of the second aspect, in some embodiments, the first duration is greater than or equal to a first preset value, the first preset value being the minimum time interval between the downlink receiving duration and the uplink transmitting duration of the first device, the downlink receiving duration being used for the first device to receive downlink signals, and the uplink transmitting duration being used for the first device to transmit uplink signals.

[0068] In conjunction with some embodiments of the second aspect, in some embodiments, the configuration of the first carrier includes at least one of the following: a second duration, the second duration being the transmission duration of the first carrier; a third duration, the third duration being the interval length between two adjacent transmission durations of the first carrier; a fourth duration, the fourth duration being the interval length between the start time or end time of the reception duration of the first downlink signal and the start time of the transmission duration of the first carrier; a carrier type of the first carrier; the number of transmissions of the first carrier; and a transmission frequency of the first carrier.

[0069] In conjunction with some embodiments of the second aspect, in some embodiments, the carrier type of the first carrier includes at least one of the following: a single-frequency sine wave; multiple single-frequency sine waves.

[0070] In conjunction with some embodiments of the second aspect, in some embodiments, the first carrier is a plurality of single-frequency sine waves, and the interval between the transmission frequencies of adjacent sine waves is the same.

[0071] In conjunction with some embodiments of the second aspect, in some embodiments, the transmission frequencies of the multiple single-frequency sine waves are different.

[0072] In conjunction with some embodiments of the second aspect, in some embodiments, the number of times the first carrier is transmitted is N, where N is an integer greater than or equal to 1.

[0073] In conjunction with some embodiments of the second aspect, in some embodiments, the value of N is greater than 1, and the time interval between the first carriers transmitted N times is the same.

[0074] In conjunction with some embodiments of the second aspect, in some embodiments, the transmission duration of the first carrier is the duration of the first carrier being transmitted once; or, the total duration of the first carrier being transmitted N times.

[0075] In conjunction with some embodiments of the second aspect, in some embodiments, the third node is a network device, and the first information is carried in configuration information sent by the network device; or, the third node is a reader / writer, and the first information is carried in a first downlink signal sent by the reader / writer.

[0076] In conjunction with some embodiments of the second aspect, in some embodiments, the first information includes at least one of the following: first indication information, used to indicate whether to transmit the first carrier; second indication information, used to indicate a fourth duration, the fourth duration being the interval length between the start or end time of the reception duration of the first downlink signal and the start time of the transmission duration of the first carrier; third indication information, used to indicate the carrier type of the first carrier; fourth indication information, used to indicate the number of times the first carrier is transmitted; fifth indication information, used to indicate a second duration, the second duration being the interval length between the transmission durations of two adjacent transmissions of the first carrier; sixth indication information, used to indicate the transmission frequency of the first carrier; and seventh indication information, used to indicate a second duration, the second duration being the transmission duration of the first carrier.

[0077] In conjunction with some embodiments of the second aspect, in some embodiments, the first indication information is located in the first information field of the first downlink signal, the first information field is used to indicate whether to transmit the first carrier, wherein the first indication information with a value of a first value is used to instruct the first node to transmit the first carrier; or, the first indication information with a value of a second value is used to instruct the first node not to transmit the first carrier.

[0078] In conjunction with some embodiments of the second aspect, in some embodiments, the first indication information is located in the second information field of the first downlink signal, and the second information field is used to indicate whether the first downlink signal has an associated uplink signal; the first indication information indicating that the first uplink signal has an associated downlink signal is used to instruct the first node to transmit the first carrier, and the first indication information indicating that the first uplink signal does not have an associated downlink signal is used to instruct the first node not to transmit the first carrier.

[0079] Thirdly, embodiments of this disclosure provide a communication device, such as a first node. The communication device includes a transceiver module configured to listen to a first downlink signal, the first downlink signal being used to determine whether to transmit a first carrier wave, the first carrier wave being used by the first device for backscattering.

[0080] In conjunction with some embodiments of the third aspect, in some embodiments, the first downlink signal is a downlink signal sent by the second node, which is associated with the first node; or, the first downlink signal is a downlink signal with a signal strength greater than or equal to a preset value.

[0081] In conjunction with some embodiments of the third aspect, in some embodiments, the reception duration of the first downlink signal is spaced apart from the transmission duration of the first carrier by a first duration.

[0082] In conjunction with some embodiments of the third aspect, in some embodiments, the first duration is the interval length between the end time of the reception duration of the first downlink signal and the start time of the transmission duration of the first carrier.

[0083] In conjunction with some embodiments of the third aspect, in some embodiments, the first duration is greater than or equal to 0.

[0084] In conjunction with some embodiments of the third aspect, in some embodiments, the first duration is greater than or equal to a first preset value, the first preset value being the minimum time interval between the downlink receiving duration and the uplink transmitting duration of the first device, the downlink receiving duration being used for the first device to receive downlink signals, and the uplink transmitting duration being used for the first device to transmit uplink signals.

[0085] In conjunction with some embodiments of the third aspect, in some embodiments, the configuration of the first carrier includes at least one of the following: a second duration, the second duration being the transmission duration of the first carrier; a third duration, the third duration being the interval length between two adjacent transmission durations of the first carrier; a fourth duration, the fourth duration being the interval length between the start time or end time of the reception duration of the first downlink signal and the start time of the transmission duration of the first carrier; a carrier type of the first carrier; the number of transmissions of the first carrier; and the transmission frequency of the first carrier.

[0086] In conjunction with some embodiments of the third aspect, in some embodiments, the carrier type of the first carrier includes at least one of the following: a single-frequency sine wave; multiple single-frequency sine waves.

[0087] In conjunction with some embodiments of the third aspect, in some embodiments, the first carrier is a plurality of single-frequency sine waves, and the transmission frequency interval between adjacent sine waves is the same.

[0088] In conjunction with some embodiments of the third aspect, in some embodiments, the transmission frequencies of the multiple single-frequency sine waves are different.

[0089] In conjunction with some embodiments of the third aspect, in some embodiments, the number of times the first carrier is transmitted is N, where N is an integer greater than or equal to 1.

[0090] In conjunction with some embodiments of the third aspect, in some embodiments, the value of N is greater than 1, and the first carrier transmitted N times is transmitted at equal intervals in the time domain.

[0091] In conjunction with some embodiments of the third aspect, in some embodiments, the transmission duration of the first carrier is the duration of the first carrier being transmitted once; or, the transmission duration of the first carrier is the total duration of the first carrier being transmitted N times.

[0092] In conjunction with some embodiments of the third aspect, in some embodiments, the configuration of the first carrier is determined by the first node.

[0093] In conjunction with some embodiments of the third aspect, in some embodiments, the configuration of the first carrier is determined based on the first information sent by the third node.

[0094] In conjunction with some embodiments of the third aspect, in some embodiments, the first information is carried in configuration information sent by the network device, or the first information is carried in a first downlink signal sent by the reader / writer.

[0095] In conjunction with some embodiments of the third aspect, in some embodiments, the first information includes at least one of the following: first indication information, used to indicate whether to transmit the first carrier; second indication information, used to indicate a fourth duration, the fourth duration being the interval length between the start time or end time of the reception duration of the first downlink signal and the start time of the transmission duration of the first carrier; third indication information, used to indicate the carrier type of the first carrier; fourth indication information, used to indicate the number of transmissions of the first carrier; fifth indication information, used to indicate a second duration, the second duration being the interval length between the transmission durations of two adjacent transmissions of the first carrier; sixth indication information, used to indicate the transmission frequency of the first carrier; and seventh indication information, used to indicate a second duration, the second duration being the transmission duration of the first carrier.

[0096] In conjunction with some embodiments of the third aspect, in some embodiments, the first indication information is located in the first information field of the first downlink signal, the first information field is used to indicate whether to transmit the first carrier, wherein the first indication information with a value of a first value is used to instruct the first node to transmit the first carrier; or, the first indication information with a value of a second value is used to instruct the first node not to transmit the first carrier.

[0097] In conjunction with some embodiments of the third aspect, in some embodiments, the communication device includes a processing module; first indication information is located in a second information field of a first downlink signal, the second information field being used to indicate whether the first downlink signal has an associated uplink signal; wherein, the processing module is further configured to: determine to transmit a first carrier when the first indication information indicates that the first uplink signal has an associated downlink signal; and determine not to transmit the first carrier when the first indication information indicates that the first uplink signal does not have an associated downlink signal.

[0098] In conjunction with some embodiments of the third aspect, in some embodiments, the communication device includes a processing module; the processing module is further configured to: upon detecting a first downlink signal, determine whether the first downlink signal has an associated downlink signal based on downlink instructions included in the first downlink signal; if it is determined that the first uplink signal has an associated downlink signal, determine to transmit a first carrier; if it is determined that the first uplink signal does not have an associated downlink signal, determine not to transmit the first carrier.

[0099] Fourthly, embodiments of this disclosure provide a communication device, such as a third node. The communication device includes: a transceiver module configured to transmit first information, the first information being used by the first node to determine the configuration of a first carrier, the first carrier being determined by the first node based on a first downlink signal it has detected, and the first carrier being used by the first device for backscattering.

[0100] In conjunction with some embodiments of the fourth aspect, in some embodiments, the first downlink signal is a downlink signal sent by the second node, which is associated with the first node; or, the first downlink signal is a downlink signal with a signal strength greater than or equal to a preset value.

[0101] In conjunction with some embodiments of the fourth aspect, in some embodiments, the reception duration of the first downlink signal is spaced apart from the transmission duration of the first carrier by a first duration.

[0102] In conjunction with some embodiments of the fourth aspect, in some embodiments, the first duration is the interval length between the end time of the reception duration of the first downlink signal and the start time of the transmission duration of the first carrier.

[0103] In conjunction with some embodiments of the fourth aspect, in some embodiments, the first duration is greater than or equal to 0.

[0104] In conjunction with some embodiments of the fourth aspect, in some embodiments, the first duration is greater than or equal to a first preset value, the first preset value being the minimum time interval between the downlink receiving duration and the uplink transmitting duration of the first device, the downlink receiving duration being used for the first device to receive downlink signals, and the uplink transmitting duration being used for the first device to transmit uplink signals.

[0105] In conjunction with some embodiments of the fourth aspect, in some embodiments, the configuration of the first carrier includes at least one of the following: a second duration, the second duration being the transmission duration of the first carrier; a third duration, the third duration being the interval length between two consecutive transmission durations of the first carrier; a fourth duration, the fourth duration being the interval length between the start time or end time of the reception duration of the first downlink signal and the start time of the transmission duration of the first carrier; a carrier type of the first carrier; the number of transmissions of the first carrier; and a transmission frequency of the first carrier.

[0106] In conjunction with some embodiments of the fourth aspect, in some embodiments, the carrier type of the first carrier includes at least one of the following: a single-frequency sine wave; a plurality of single-frequency sine waves.

[0107] In conjunction with some embodiments of the fourth aspect, in some embodiments, the first carrier is a plurality of single-frequency sine waves, and the interval between the transmission frequencies of adjacent sine waves is the same.

[0108] In conjunction with some embodiments of the fourth aspect, in some embodiments, the transmission frequencies of the multiple single-frequency sine waves are different.

[0109] In conjunction with some embodiments of the fourth aspect, in some embodiments, the number of times the first carrier is transmitted is N, where N is an integer greater than or equal to 1.

[0110] In conjunction with some embodiments of the fourth aspect, in some embodiments, the value of N is greater than 1, and the time interval between the first carriers transmitted N times is the same.

[0111] In conjunction with some embodiments of the fourth aspect, in some embodiments, the transmission duration of the first carrier is the duration of the first carrier being transmitted once; or, the transmission duration of the first carrier is the total duration of the first carrier being transmitted N times.

[0112] In conjunction with some embodiments of the fourth aspect, in some embodiments, the third node is a network device, and the first information is carried in configuration information sent by the network device; or, the third node is a reader / writer, and the first information is carried in a first downlink signal sent by the reader / writer.

[0113] In conjunction with some embodiments of the fourth aspect, in some embodiments, the first information includes at least one of the following: first indication information, used to indicate whether to transmit the first carrier; second indication information, used to indicate a fourth duration, the fourth duration being the interval length between the start or end time of the reception duration of the first downlink signal and the start time of the transmission duration of the first carrier; third indication information, used to indicate the carrier type of the first carrier; fourth indication information, used to indicate the number of transmissions of the first carrier; fifth indication information, used to indicate a second duration, the second duration being the interval length between the transmission durations of two adjacent transmissions of the first carrier; sixth indication information, used to indicate the transmission frequency of the first carrier; and seventh indication information, used to indicate a second duration, the second duration being the transmission duration of the first carrier.

[0114] In conjunction with some embodiments of the fourth aspect, in some embodiments, the first indication information is located in the first information field of the first downlink signal, the first information field being used to indicate whether to transmit the first carrier, wherein the first indication information having a first value is used to instruct the first node to transmit the first carrier; or, the first indication information having a second value is used to instruct the first node not to transmit the first carrier.

[0115] In conjunction with some embodiments of the fourth aspect, in some embodiments, the first indication information is located in the second information field of the first downlink signal, the second information field being used to indicate whether the first downlink signal has an associated uplink signal; the first indication information indicating that the first uplink signal has an associated downlink signal is used to instruct the first node to transmit the first carrier, and the first indication information indicating that the first uplink signal does not have an associated downlink signal is used to instruct the first node not to transmit the first carrier.

[0116] Fifthly, this disclosure provides a communication method executed by a communication system, which includes a first node and a third node; wherein the method includes: the third node sending first information to the first node, the first information being used by the first node to determine the configuration of a first carrier, the first carrier being used by a first device to perform backscattering; the first node listening to a first downlink signal, the first downlink signal being used by the first node to determine whether to send the first carrier.

[0117] In a sixth aspect, embodiments of this disclosure provide a communication device, comprising: one or more processors; wherein the communication device is configured to perform a communication method as described in any one of the first, second, and third aspects and their embodiments. The communication device may be a first node or a third node.

[0118] In a seventh aspect, embodiments of this disclosure provide a communication system comprising: a first node and a third node; the first node is configured to implement the communication method as described in any one of the first aspects and embodiments thereof; and the third node is configured to implement the communication method as described in any one of the second aspects and embodiments thereof.

[0119] Eighthly, embodiments of this disclosure provide a computer storage medium storing instructions that, when executed on a communication device, cause the communication device to perform the communication method as described in any one of the first, second, and third aspects and their embodiments. The communication device may be a first node or a second node.

[0120] In a ninth aspect, embodiments of this disclosure provide a computer program product that, when executed by a communication device, causes the communication device to perform the communication method as described in any one of the first, second, and third aspects and their embodiments. The communication device may be a first node or a second node.

[0121] In a tenth aspect, embodiments of this disclosure provide a computer program that, when run on a computer, causes the computer to perform the communication method as described in any one of the first, second, third, and embodiments thereof.

[0122] Eleventhly, embodiments of this disclosure provide a chip or chip system. The chip or chip system includes processing circuitry configured to perform the communication method according to any one of the first, second, and third aspects and their embodiments described above.

[0123] It is understood that the aforementioned first node, third node, communication device, communication system, computer storage medium, computer program product, computer program, chip, or chip system are all used to execute the methods proposed in the embodiments of this disclosure. Therefore, the beneficial effects that can be achieved can be referred to the beneficial effects in the corresponding methods, and will not be repeated here.

[0124] This disclosure provides a communication method, communication device, communication system, storage medium, and program product. In some embodiments, terms such as communication method, information processing method, control method, carrier transmission method, and carrier control method can be used interchangeably, as can terms such as sensing system, AIoT system, information processing system, communication system, carrier control system, and carrier transmission system.

[0125] This disclosure is not exhaustive, but merely illustrative of some embodiments, and is not intended to limit the scope of protection of this disclosure. Unless otherwise specified, each step in a particular embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementation methods in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined, for example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0126] In each of the disclosed embodiments, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of the embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0127] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure.

[0128] In this embodiment of the disclosure, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the," "the," "the," "the," "the," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun following the article can be understood as either a singular expression or a plural expression.

[0129] In the embodiments disclosed herein, "multiple" refers to two or more.

[0130] In some embodiments, the terms “at least one of”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.

[0131] In some embodiments, the notation "at least one of A and B", "A and / or B", "A in one case, B in another", "in response to one case A, in response to another case B", etc., may include the following technical solutions depending on the situation: in some embodiments, A (execute A regardless of B); in some embodiments, B (execute B regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). The same applies when there are more branches such as A, B, C, etc.

[0132] In some embodiments, the notation "A or B" may include the following technical solutions, depending on the situation: in some embodiments, A (execution of A regardless of B); in some embodiments, B (execution of B regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The same applies when there are more branches such as A, B, C, etc.

[0133] The prefixes "first," "second," etc., used in the embodiments of this disclosure are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, quantity, or content of the descriptive objects. The description of the descriptive objects is found in the claims or the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the descriptive object is a "field," the ordinal numbers preceding "field" in "first field" and "second field" do not restrict the position or order of the "fields." "First" and "second" do not restrict whether the "fields" they modify are in the same message, nor do they restrict the order of "first field" and "second field." Similarly, if the descriptive object is a "level," the ordinal numbers preceding "level" in "first level" and "second level" do not restrict the priority between "levels." Furthermore, the number of descriptive objects is not limited by ordinal numbers and can be one or more. For example, in "first device," the number of "devices" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the object being described is "device", then "first device" and "second device" can be the same device or different devices, and their types can be the same or different. Similarly, if the object being described is "information", then "first information" and "second information" can be the same information or different information, and their content can be the same or different.

[0134] In some embodiments, “including A,” “containing A,” “for indicating A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0135] In some embodiments, the terms “in response to…”, “in response to determining…”, “in the case of…”, “when…”, “if…”, “if…”, etc., can be used interchangeably.

[0136] Descriptions such as “when…”, “under…”, and “if” all indicate that the device will take corresponding actions under certain objective circumstances. They are not time-limited, nor do they require the device to make a judgment action when implementing the action, nor do they imply any other limitations.

[0137] In some embodiments, the terms “greater than,” “greater than or equal to,” “not less than,” “more than,” “more than or equal to,” “not less than,” “higher than,” “higher than or equal to,” “not lower than,” and “above” can be used interchangeably, as can the terms “less than,” “less than or equal to,” “not greater than,” “less than,” “less than or equal to,” “not more than,” “lower than,” “lower than or equal to,” “not higher than,” and “below”.

[0138] In some embodiments, devices, etc., can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as “device”, “equipment”, “circuit”, “network element”, “node”, “function”, “unit”, “section”, “system”, “network”, “chip”, “chip system”, “entity”, and “subject” can be used interchangeably.

[0139] In some embodiments, "network" can be interpreted as devices included in a network (e.g., access network devices, core network devices, etc.).

[0140] In some embodiments, the terms "network devices", "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station", "fixed station", "node", "access network node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femtocell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", and "bandwidth part (BWP)" can be used interchangeably.

[0141] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", "subscriber station", "mobile unit", "subscriber unit", "wireless unit", "remote unit", "mobile device", "wireless device", "wireless communication device", "remote device", "mobile subscriber station", "access terminal", "mobile terminal", "wireless terminal", "remote terminal", "handset", "user agent", "mobile client", and "client" can be used interchangeably.

[0142] In some embodiments, access network devices, core network devices, or network devices can be replaced by terminals. For example, embodiments of this disclosure can also be applied to structures where communication between access network devices, core network devices, or network devices and terminals is replaced by communication between multiple terminals (e.g., device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, the structure can also be configured such that the terminal has all or part of the functions of the access network device. Furthermore, terms such as "uplink" and "downlink" can be replaced with terms corresponding to communication between terminals (e.g., "sidelink"). For example, uplink channel, downlink channel, etc., can be replaced with sidelink channel, and uplink link, downlink, etc., can be replaced with sidelink link.

[0143] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, core network device, or network device may also be configured to have all or some of the functions of the terminal.

[0144] In some embodiments, the acquisition of data, information, etc., may comply with the laws and regulations of the country where the location is situated.

[0145] In some embodiments, data, information, etc., may be obtained with the user's consent.

[0146] Furthermore, each element, each row, or each column in the table of this disclosure can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0147] Figure 1A is a schematic diagram of an architecture of a communication system according to an embodiment of the present disclosure. As shown in Figure 1A, the communication system 100 includes: a first node 101, a second node 102, a third node 103, and a first device 104.

[0148] In some embodiments, the first node 101 is used to transmit a carrier wave, which is then backscattered by the first device 104. In some embodiments, the carrier wave transmitted by the first node 101 can be a continuous wave. In some embodiments, the carrier wave can also be referred to as an electromagnetic wave, radio electromagnetic wave, etc.

[0149] In some embodiments, the name of the first node 101 is not limited, and it may be, for example, "carrier wave node (CWN)", "carrier transmission node", "continuous wave node (CWN)", "continuous wave transmission node", etc.

[0150] In some embodiments, the second node 102 is used to send downlink signals to the first device 104.

[0151] In some embodiments, the name of the second node 102 is not limited, and may be, for example, "downlink signal node (DSN)," "downlink Tx node (DTN)," "transmitting node," "reader," etc.

[0152] In some embodiments, the third node 103 is used to control the first node 101 to transmit a carrier wave.

[0153] In some embodiments, the name of the third node 103 is not limited, and may be, for example, "control node", "base station (BS)", "reader", "uplink Rx node (URN)", "uplink receiver (UR)", "receiving node", "uplink signal node (USN)", "DSN", "DTN", "transmitting node", etc.

[0154] In some embodiments, the first device 104 is used to backscatter the received signal.

[0155] In some embodiments, the name of the first device 104 is not limited, and may be, for example, "backscattering node", "backscattering device", "AIoT device", "AIoT terminal", device, tag, etc.

[0156] In some embodiments, the first node 101 can be a reader. In one example, the first node 101 can be a base station, an intermediate node, a terminal, etc. In some embodiments, the first node 101 may not be a reader. In one example, the first node 101 can be a terminal, a base station without read / write functionality, etc.

[0157] In some embodiments, the second node 102 and the third node 103 can be readers. In some embodiments, the second node 102 and the third node 103 can be the same reader. In some embodiments, the second node 102 and the third node 103 can be different readers.

[0158] In some embodiments, the first node 101, the second node 102, the third node 103, and the first device 104 may be a terminal or a network device.

[0159] In some embodiments, the functions of the first node 101, the second node 102, the third node 103, and the first device 104 can be deployed in one device or in multiple devices, with each device having the functions of one or more of the aforementioned nodes.

[0160] In some embodiments, the terminal includes, but is not limited to, at least one of the following: mobile phone, wearable device, Internet of Things device, car with communication function, smart car, tablet computer, computer with wireless transceiver function, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal device in industrial control, wireless terminal device in self-driving, wireless terminal device in remote medical surgery, wireless terminal device in smart grid, wireless terminal device in transportation safety, wireless terminal device in smart city, and wireless terminal device in smart home.

[0161] In some embodiments, network devices may include access network devices and / or core network devices. Access network devices are, for example, nodes or devices that connect terminals to a wireless network. Access network devices may include, but are not limited to, at least one of the following: evolved NodeB (eNB), next-generation eNB (ng-eNB), next-generation NodeB (gNB), node B (NB), home node B (HNB), home evolved node B (HeNB), radio backhaul device, radio network controller (RNC), base station controller (BSC), base transceiver station (BTS), base band unit (BBU), mobile switching center, base station in a 6G communication system, open RAN, cloud RAN, base station in other communication systems, and access node in a Wi-Fi system.

[0162] In some embodiments, the technical solutions of this disclosure can be applied to the open RAN architecture. In this case, the interfaces between or within network devices involved in the embodiments of this disclosure can be transformed into internal interfaces of open RAN. The processes and information interactions between these internal interfaces can be implemented by software or programs.

[0163] In some embodiments, the access network device may be composed of a central unit (CU) and a distributed unit (DU). The CU may also be called a control unit. The CU-DU structure can separate the protocol layer of the network device. Some of the protocol layer functions are centrally controlled by the CU, while the remaining part or all of the protocol layer functions are distributed in the DU and centrally controlled by the CU. However, this is not the only possibility.

[0164] In some embodiments, the core network equipment may be a single device including a first network element, or it may be multiple devices or a group of devices, each including a first network element. Network elements may be virtual or physical. The core network may include, for example, at least one of an evolved packet core (EPC), a 5G core network (5GCN), or a next-generation core (NGC).

[0165] It is understood that the communication system described in this disclosure is for the purpose of more clearly illustrating the technical solutions of this disclosure, and does not constitute a limitation on the technical solutions provided in this disclosure. As those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions provided in this disclosure are also applicable to similar technical problems.

[0166] The following embodiments of this disclosure can be applied to the communication system 100 shown in FIG1A, or to some of the main bodies, but are not limited thereto. The main bodies shown in FIG1A are illustrative. The communication system may include all or some of the main bodies in FIG1A, or it may include other main bodies outside of FIG1A. The number and form of each main body are arbitrary. The connection relationship between the main bodies is illustrative. The main bodies may not be connected or may be connected. The connection can be in any way, it can be a direct connection or an indirect connection, it can be a wired connection or a wireless connection.

[0167] The embodiments disclosed herein can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), Super 3G, IMT-Advanced, 4th Generation Mobile Communication System (4G), 5th Generation Mobile Communication System (5G), 5G New Radio (NR), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future Generation Radio Access (FX), Global System for Mobile Communications (GSM), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), and IEEE 802.20, ultra-wideband (UWB), Bluetooth (a registered trademark), public land mobile network (PLMN) networks, device-to-device (D2D) systems, machine-to-machine (M2M) systems, Internet of Things (IoT) systems, vehicle-to-everything (V2X) systems, systems utilizing other communication methods, and next-generation systems built upon them. Furthermore, multiple systems can be combined (e.g., a combination of LTE or LTE-A with 5G).

[0168] The following is an explanation and interpretation of the terminology used in this disclosure.

[0169] I. AIoT Devices:

[0170] AIoT is a type of Internet of Things (IoT). Compared to narrowband (NB) IoT devices, AIoT devices are less complex, less expensive, and have lower maintenance costs. AIoT devices can operate without batteries, powered by radio waves they receive. Alternatively, AIoT devices can include batteries with limited energy storage capabilities, but these batteries do not require manual charging and can draw power from external sources.

[0171] In one example, the energy used for charging can come from electromagnetic waves or from non-electromagnetic waves (such as heat energy, kinetic energy, etc.).

[0172] In some embodiments, AIoT devices can employ backscattering technology for communication. Backscattering communication is a technique that utilizes the principle of radio frequency signal backscattering to achieve extremely low-power modulation and transmission. During backscattering communication, the AIoT device receives electromagnetic waves, and its internal circuitry modulates the information to be transmitted onto the incident electromagnetic waves using load impedance modulation. The modulated electromagnetic waves carrying the information are then transmitted. In some embodiments, the modulation method can be varied, such as amplitude shift keying (ASK), frequency shift keying (FSK), and phase shift keying (PSK).

[0173] In some embodiments, for AIoT devices that communicate using backscattering, the AIoT device requires a carrier energy source (such as a CWN) to provide a carrier (such as a CW) for backscattering while transmitting data. In one example, the CW is typically of constant amplitude. In another example, the CW may also be referred to as a carrier wave.

[0174] In some embodiments, the workflow of an AIoT device communicating using backscatter is as follows: the network sends a downlink command to the AIoT device, and upon receiving the downlink command, the AIoT device sends a corresponding response to the network or performs a corresponding operation. However, while transmitting data, the AIoT device requires a backscatter network (CWN) to provide CW available for reflection.

[0175] In some embodiments, different types of AIoT devices may differ in any aspect such as operating mode, power acquisition, or storage capacity.

[0176] In some embodiments, the type of AIoT device may include:

[0177] Type 1: Cannot generate or amplify signals independently, but has a certain energy storage capacity.

[0178] Type 2a: Cannot generate independent signals, but can use stored energy to amplify reflected signals, and has energy storage capability.

[0179] Type 2b: Can generate signals independently and has energy storage capabilities.

[0180] Of the three types of AIoT devices mentioned above, Type 2b AIoT devices have the strongest capabilities but also the highest cost. Type 1 AIoT devices have the weakest capabilities but also the lowest cost. Type 1 and Type 2a AIoT devices can only use backscattering and cannot actively transmit signals, therefore they require other nodes to provide signal transmission (CW) as energy input. Type 2b AIoT devices can actively generate signals within their own circuitry using energy storage, thus eliminating the need for CW.

[0181] II. Links and Nodes in AIoT:

[0182] In AIoT, there can be four types of links: link 1 for transmitting downlink commands, link 2 for receiving uplink commands, link 3 for sending CW signals, and link 4 for sending charging signals. The four nodes involved in these four links can be the same node or multiple separate nodes.

[0183] In some embodiments, in the above links, link 1 can be understood as a downlink physical layer link, such as R2D (reader-to-device), link 2 can be understood as an uplink physical layer link, such as D2R (device-to-reader), and link 3 can be understood as a carrier physical layer link, such as CW2D (carrier-wave-to-device).

[0184] In some embodiments, R2D is carried in the physical reader-to-device channel (PRDCH), and D2R is carried in the physical reader-to-reader channel (PDRCH).

[0185] In some embodiments, R2D transmission can be understood as downlink transmission, transmission from a reader to an AIoT device, etc. In some embodiments, downlink signals can be transmitted over R2D.

[0186] In some embodiments, D2R transmission can be understood as uplink transmission, transmission from a reader to an AIoT device, etc. In some embodiments, uplink signals can be transmitted over D2R.

[0187] In some embodiments, CW2D transmission can be understood as carrier transmission, continuous wave transmission, transmission from a carrier node to an AIoT device, etc. In some embodiments, a carrier can be transmitted on CW2D.

[0188] In some embodiments, the reader / writer described above can be an access network device (such as a base station), an intermediate node, or a terminal.

[0189] Figure 1B is a schematic diagram of an AIoT architecture according to an embodiment of this disclosure. As shown in Figure 1B, AIoT may include at least one of DSN, UR, and CWN. DSN is used for R2D transmission, UR is used for D2R transmission, and CWN is used for CW2D transmission. In some embodiments, DSN and UR are readers / writers.

[0190] In some embodiments, CWN may or may not be a reader / writer.

[0191] In some embodiments, for AIoT devices that cannot actively transmit (such as Type 1 and Type 2a devices), an external carrier wave is required to be provided to the AIoT device for backscattering. When the carrier wave is provided by a node within the topology, it can be considered that the carrier wave originates from inside the topology (CW). When the carrier wave is provided by a node outside the topology, it can be considered that the carrier wave originates from outside the topology (CW).

[0192] In light of the aforementioned AIoT, how to control the transmission of carrier waves is a problem that needs to be studied.

[0193] It should be noted that in the embodiments disclosed herein, the terms "electromagnetic wave", "radio electromagnetic wave", "radio frequency signal", and "carrier signal" can be used interchangeably.

[0194] This disclosure provides a communication method, communication device, communication system, storage medium, and program product to control carrier transmission.

[0195] The devices in this disclosure are not limited to AIoT devices, but can also be devices in other systems or networks that use electromagnetic waves for backscattering.

[0196] In some embodiments, the communication system may include a reader / writer (such as a DSN, UR), a CWN, and an AIoT device. In one example, the first node may be a CWN. In one example, the second node is a reader / writer. In one example, the first node, the second node, and the third node may be at least one of a core network device, an access network device (such as a base station), an intermediate node, or a terminal. In one example, the first device is an AIoT device.

[0197] In some embodiments, the process of the first node transmitting a carrier wave can be network-controlled.

[0198] In some embodiments, the first node, second node, third node, and first device can communicate directly or indirectly through an intermediate node. For example, the intermediate node can be an AIoT device.

[0199] Figure 2A is an interactive schematic diagram of a communication method provided according to an embodiment of the present disclosure. As shown in Figure 2A, the present disclosure relates to a communication method. Executed by a communication system 100, the communication method includes steps S2101 to S2105.

[0200] In this embodiment of the disclosure, the first node is a CWN, the second and third nodes are the same node, such as a reader / writer, and the first device is an AIoT device, as an example for illustration.

[0201] In some embodiments, the CWN supports AIoT service reception, such as receiving R2D. In some embodiments, the CWN supports AIoT service transmission, such as transmitting CW2D. In some embodiments, the CWN supports both AIoT service reception and AIoT service transmission.

[0202] In some embodiments, the third node may also be a UR, a network device, etc., and its execution process can be referred to in steps S2101 to S2105 below. This embodiment will not elaborate on this.

[0203] In step S2101, the reader sends information A.

[0204] In some embodiments, the CWN receives information A. In this case, the first information is information A.

[0205] In some embodiments, information A is used to indicate the carrier configuration of the CWN. In some embodiments, information A is used to indicate the carrier configuration of the CWN when a first downlink signal is detected. In some embodiments, information A is used to indicate the carrier configuration of the CWN when R2D is detected. In some embodiments, information A is used to indicate the carrier configuration of the CWN. In some embodiments, information A is used to indicate the carrier configuration of the CWN when a first downlink signal is detected. In some embodiments, information A is used to indicate the carrier configuration of the CWN when R2D is detected. In some embodiments, information A is used to indicate the configuration of the first carrier transmitted by the CWN. In some embodiments, information A is used to indicate the configuration of the first carrier transmitted by the CWN when a first downlink signal is detected. In some embodiments, information A is used to indicate the configuration of the first carrier transmitted by the CWN when a first downlink signal is detected. In some embodiments, the first downlink signal is a downlink signal transmitted by the reader to the AIoT device. In some embodiments, the first carrier is a carrier transmitted by the CWN to the AIoT device receiving the first downlink signal, and the first carrier is used by the AIoT device to transmit an uplink signal associated with the first downlink signal.

[0206] In some embodiments, information A can be the initial configuration of the CWN by the reader / writer, or it can be the reconfiguration of the CWN by the reader / writer. In some embodiments, the reconfiguration of the CWN by the reader / writer can be triggered by the reader / writer, such as periodic configuration or dynamic configuration. In some embodiments, the reconfiguration of the CWN by the reader / writer can also be requested by the CWN, such as the CWN requesting a change in carrier configuration based on its own power level, hardware status, etc. In some embodiments, when information A is the reconfiguration of the CWN by the reader / writer, information A is used to indicate the new carrier configuration so that the CWN can apply the newly configured carrier in subsequent processes.

[0207] In some embodiments, the name of information A is not specifically limited, for example, configuration information, carrier configuration information, reconfiguration information, carrier reconfiguration information, configuration change information, configuration modification information, carrier modification information, carrier configuration modification information, indication information, carrier indication information, carrier change information, carrier modification information, carrier modification information, carrier modification indication information, etc.

[0208] In some embodiments, the configuration of the first carrier may include at least one of the following: a second duration, a third duration, a fourth duration, a carrier type of the first carrier, the number of transmissions of the first carrier, and the transmission frequency of the first carrier. Correspondingly, information A may include at least one of the following: second indication information, third indication information, fourth indication information, fifth indication information, sixth indication information, and seventh indication information. The concepts of the second to seventh indication information are described below.

[0209] In some embodiments, the second indication information is used to indicate the fourth duration. In this case, the second duration is indicated by the reader / writer. In some embodiments, the CWN can determine the transmission time of the first carrier, that is, the start time of the transmission duration of the first carrier, based on the fourth duration. In one embodiment, the fourth duration is the interval length between the start time of the reception duration of the first downlink signal and the start time of the transmission duration of the first carrier. Therefore, when the CWN detects the first downlink signal, it can determine the transmission time of the first carrier by offsetting the fourth duration from the start time of the first downlink signal, that is, the start time of the reception duration of the first downlink signal. In one embodiment, the fourth duration is the interval length between the end time of the reception duration of the first downlink signal and the start time of the transmission duration of the first carrier. Therefore, when the CWN detects the first downlink signal, it can determine the transmission time of the first carrier by offsetting the fourth duration from the end time of the reception duration of the first downlink signal. In one embodiment, when the fourth duration is the interval length between the start time of the reception duration of the first downlink signal and the start time of the transmission duration of the first carrier, the fourth duration can be greater than or equal to the reception duration of the first downlink signal.

[0210] In some embodiments, the reception duration of the first downlink signal can also be described as the transmission duration of the first downlink signal, the transmission duration of the first downlink signal, etc. In one embodiment, the reception duration of the first downlink signal can be the duration of R2D transmission (e.g., T). R2D In one embodiment, the reception duration of the first downlink signal can be understood as the duration for which the AIoT device receives the first downlink signal, the duration for which the reader sends the first downlink signal to the AIoT device, or the duration for which the CWN receives the first downlink signal.

[0211] In some embodiments, the transmission duration of the first carrier can also be described as the transmission duration of the first carrier, the transmission duration of the first carrier, etc. In one embodiment, the transmission duration of the first carrier (such as the second duration) can be the transmission duration of CW2D. In one embodiment, the transmission duration of the first carrier can be understood as the duration for CWN to transmit the first carrier, or the duration for CWN to transmit the first carrier to the AIoT device, or the duration for the AIoT device to receive the first carrier.

[0212] In some embodiments, the transmission duration of the first carrier can be the duration of the first carrier in a single transmission. In some embodiments, the transmission duration of the first carrier can be the total duration of the first carrier in multiple transmissions. In one example, the duration of the first carrier in a single transmission is T, and the second duration = T, or the second duration = N × T, where T is greater than 0.

[0213] In one embodiment, the AIoT device may further be configured with a minimum time interval (such as a first preset value) between the downlink reception duration and the uplink transmission duration. In this case, the first duration is greater than or equal to the minimum time interval (Tgap2). In other words, there is at least a Tgap2 interval between the reception duration of the first downlink signal and the transmission duration of the first carrier, where Tgap2 ≥ 0. In one example, the minimum time interval may be indicated by the reader or specified by the protocol.

[0214] In some embodiments, the second duration may be indicated by the reader / writer, in which case information A may include the seventh indication information. In some embodiments, the second duration may be pre-configured, such as as specified by the protocol or determined by CWN according to its own implementation, in which case information A may not include the seventh indication information.

[0215] In some embodiments, the interval between the reception duration of the first downlink signal and the transmission duration of the first carrier can be a first duration (e.g., Tgap). The first duration can be greater than or equal to 0. In some embodiments, the first duration can be the interval between the end time of the reception duration of the first downlink signal and the start time of the transmission duration of the first carrier. In one embodiment, there may be an interval between the reception duration of the first downlink signal and the transmission duration of the first carrier; in this case, the first duration is greater than 0. The CWN can transmit the first carrier after completing the reception of the first downlink signal at intervals of the first duration. In some embodiments, there may be no interval between the reception duration of the first downlink signal and the transmission duration of the first carrier; in this case, the first duration is equal to 0. Then, the CWN can transmit the first carrier immediately after completing the reception of the first downlink signal.

[0216] In some embodiments, since the fourth duration can be used to determine the transmission time of the first carrier, the first duration can also be determined based on the fourth duration. In one embodiment, when the fourth duration is the interval length between the start time of the reception duration of the first downlink signal and the start time of the transmission duration of the first carrier, the CWN can determine the first duration based on the fourth duration. In this case, the first duration can be the difference between the fourth duration and the reception duration of the first downlink signal. In one embodiment, when the fourth duration is the interval length between the end time of the reception duration of the first downlink signal and the start time of the transmission duration of the first carrier, the CWN can determine the first duration based on the fourth duration. In this case, the first duration is equal to the fourth duration.

[0217] In some embodiments, the fourth duration may also be pre-configured, such as as specified by the protocol or determined by CWN according to its own implementation. In this case, the second indication information may not be included in information A.

[0218] In some embodiments, the third indication information is used to indicate the carrier type of the first carrier. In this case, the carrier type of the first carrier is indicated by the reader / writer. In one embodiment, the carrier type of the first carrier may include at least one of the following: a single-frequency sine wave and multiple single-frequency sine waves. That is, the first carrier can be a single-frequency sine wave or multiple single-frequency sine waves. In one example, multiple single-frequency sine waves refer to two or more single-frequency sine waves.

[0219] In some embodiments, a single-tone sine wave can be understood as a sine wave with a single frequency, or a sine wave at a single frequency point. In some embodiments, a single-tone sine wave can be an unmodulated single-tone sine wave. In some embodiments, a single-tone sine wave can be understood as a sine wave with a single frequency point. In some embodiments, multiple single-tone sine waves can be understood as sine waves with a single frequency point at multiple frequency points.

[0220] In some embodiments, when the first carrier is a plurality of single-frequency sine waves, the transmission frequencies of the plurality of single-frequency sine waves are different. In one example, the first carrier may include carrier 0 with frequency f0, carrier 1 with frequency f1, and carrier 2 with frequency f2, where f0 ≠ f1 ≠ f2.

[0221] In some embodiments, the transmission frequency of the first carrier may be indicated by the reader / writer. In this case, information A may also include sixth indication information. In some embodiments, the transmission frequency of the first carrier may be pre-configured, such as that specified by the protocol or determined by the CWN according to its own implementation. In this case, information A may not include the sixth indication information.

[0222] In some embodiments, when the first carrier is a plurality of single-frequency sine waves, the transmission frequencies of the plurality of single-frequency sine waves are spaced apart in the frequency domain, that is, there is a gap between the transmission frequencies of adjacent sine waves. In some embodiments, the spacing between adjacent single-frequency sine waves in the frequency domain is the same, that is, the plurality of single-frequency sine waves are a plurality of single-frequency sine waves that are equally spaced in the frequency domain. In one example, the first carrier may include carrier 0 with frequency f0, carrier 1 with frequency f1, and carrier 2 with frequency f2, the gap between f0 and f1 is fgap1, the gap between f1 and f2 is fgap2, and fgap1 = fgap2. In some embodiments, the spacing between adjacent single-frequency sine waves in the frequency domain is not the same, that is, in the plurality of single-frequency sine waves, the spacing between each pair of adjacent sine waves is not the same. In one example, the first carrier may include carrier 0 with frequency f0, carrier 1 with frequency f1, carrier 2 with frequency f2, and carrier 3 with frequency f3. The interval between f0 and f1 is fgap1, between f1 and f2 is fgap2, and between f2 and f3 is fgap3, where fgap1 ≠ fgap2 ≠ fgap3. In some embodiments, the intervals between adjacent single-frequency sine waves in the frequency domain are partially the same; that is, among multiple single-frequency sine waves, some adjacent pairs of sine waves have the same interval, while others have different intervals. In one example, the first carrier may include carrier 0 with frequency f0, carrier 1 with frequency f1, carrier 2 with frequency f2, and carrier 3 with frequency f3. The interval between f0 and f1 is fgap1, between f1 and f2 is fgap2, and between f2 and f3 is fgap3, where fgap1 = fgap2 ≠ fgap3.

[0223] In some embodiments, when the first carrier includes multiple single-frequency sine waves, the multiple single-frequency sine waves can be transmitted on different frequency domain resources on the same time domain resource.

[0224] In some embodiments, the length of the time-domain resources used to transmit the first carrier can be a second duration.

[0225] In some embodiments, the carrier type of the first carrier may also be pre-configured, such as as specified by the protocol, or determined by CWN according to its own implementation. In this case, information A may not include the third indication information.

[0226] In some embodiments, the fourth indication information is used to indicate the number of times the first carrier is transmitted. In some embodiments, the number of times the first carrier is transmitted can be N, and the value of the fourth indication information can be N, where N≥1. In some embodiments, N=1, the fourth indication information indicates that the first carrier is transmitted once, in which case the first carrier can be transmitted on one time domain resource. In some embodiments, N>1, the fourth indication information indicates that the first carrier is transmitted N times, such as twice or more, in which case the first carrier is repeatedly transmitted on N time domain resources.

[0227] In some embodiments, the number of times the first carrier is transmitted can also be pre-configured, such as as specified by the protocol or determined by the CWN according to its own implementation. In this case, the fourth indication information may not be included in information A.

[0228] In some embodiments, when the first carrier is transmitted N times, the N transmissions of the first carrier are spaced apart in the time domain; that is, the first carrier is transmitted N times at equal intervals in the time domain. In some embodiments, the time interval between two adjacent transmissions of the first carrier can be a third time duration; that is, after completing one transmission, the first carrier is transmitted again after a third time duration, and this process is repeated N times. Therefore, the first carrier is transmitted N times at equal intervals in the time domain.

[0229] In some embodiments, the third duration may be equal to or unequal to the second duration.

[0230] In some embodiments, the fifth indication information is used to indicate the third duration. In one embodiment, the third duration may be indicated by the reader / writer, in which case information A may include the fifth indication information. In one embodiment, the third duration may be pre-configured, such as as specified by the protocol or determined by the CWN according to its own implementation, in which case information A may not include the fifth indication information.

[0231] In some embodiments, information A may be included in downlink commands sent by the reader to the AIoT device. In one example, downlink commands may include inventory commands, access commands, etc. In one example, inventory commands may include query, queryadjust, queryrep, random number request (Req_RN), acknowledgment (ACK), negative acknowledgment (NAK), etc. Access commands may include read, write, kill, lock, access, blockwrite, blockerase, etc. Of course, downlink commands may also include select commands, such as challenge commands; this disclosure does not specifically limit their scope.

[0232] In some embodiments, information A may also be sent by a network device, such as a base station. In this case, information A is included in downlink higher-layer signaling. In one example, downlink higher-layer signaling may include signaling in radio resource control (RRC) messages, media access control (MAC) control element (CE), downlink control information (DCI), physical downlink control channel (PDCCH), physical downlink share channel (PDSCH), non-access stratum (NAS) messages, etc. Of course, the fourth information may also be other downlink higher-layer signaling, and this disclosure does not specifically limit this.

[0233] In some embodiments, when information A is a reconfiguration of the CWN by the reader / writer, the reader / writer may instruct a change to at least one of the following: the second duration, the third duration, the fourth duration, the carrier type of the first carrier, the number of transmissions of the first carrier, and the transmission frequency of the first carrier. In one example, if the currently transmitted carrier is a single-frequency sine wave, information A may instruct the CWN to subsequently transmit two single-frequency sine waves. In one example, if the frequency of the single-frequency sine wave contained in the currently transmitted first carrier is f1, information A may instruct the CWN to subsequently transmit single-frequency sine waves with frequencies f2 and f3 respectively.

[0234] In some embodiments, step S2101 can be ignored. In this case, the above information A can be pre-configured, such as as specified by the protocol or determined by CWN according to its own implementation.

[0235] In step S2102, CWN monitors the first downlink signal.

[0236] In one example, Figures 3A and 3B are two schematic diagrams of AIoT topologies provided according to embodiments of the present disclosure. CWN 301 listens for R2D transmitted by the reader. In the topology shown in Figure 3A, the reader 302 can be a base station; in the topology shown in Figure 3B, the reader 302 is an intermediate node, and the reader 302 and base station 304 can perform uplink and downlink communication.

[0237] In some embodiments, the downlink service or downlink data sent by the reader 302 to the AIoT device 303 can be transmitted via Radio-to-Digital (R2D), with the physical layer carried through the PRDCH channel. Although the R2D is transmitted from the reader 302 to the AIoT device 303, due to the characteristics of radio wave transmission, other devices within a certain spatial, distance, and directional range can also receive the R2D. Based on this, the CWN can activate the receiver to listen to the transmission on the R2D link, thereby listening to the first downlink signal.

[0238] In step S2103, the reader sends a first downlink signal.

[0239] In some embodiments, the AIoT device receives a first downlink signal.

[0240] In some embodiments, the CWN receives a first downlink signal.

[0241] In some embodiments, after the CWN enters the R2D listening mode, the reader sends a first downlink signal, and the CWN receives the first downlink signal. At this time, the CWN confirms that it has detected the first downlink signal. In some embodiments, the first downlink signal carries a downlink command sent by the reader to the AIoT device.

[0242] In some embodiments, the R2D sent by the reader to the AIoT device may contain only service information and data, without any information about carrier configuration or any information instructing the CWN on how to transmit the carrier.

[0243] In some embodiments, the first downlink signal can be any downlink signal. Therefore, as long as the CWN receives the downlink signal, it can determine that it has detected the first downlink signal. In this case, the first carrier wave is transmitted.

[0244] In some embodiments, the first downlink signal can be a specific downlink signal. Therefore, the CWN can only determine that it has detected the first downlink signal if it receives the specific downlink signal. In this case, the CWN transmits the first carrier wave.

[0245] In some embodiments, a specific downlink signal can be a downlink signal sent by a reader associated with a CWN. In one embodiment, the network device or reader can determine the association between the reader and the CWN. Then, when the CWN listens for downlink signals, it can only listen for downlink signals sent by the associated reader (such as a first downlink signal). Upon receiving the first downlink signal, the CWN confirms that it has listened to the first downlink signal. In one example, the reader can carry indication information in the first downlink signal, which indicates the CWN associated with the reader. Then, after receiving the downlink signal, the CWN can determine whether the CWN indicated by the indication information in the downlink signal matches itself by performing sequence detection, decoding, and other processing on the downlink signal. If they match, the CWN can confirm that it has listened to the first downlink signal. Otherwise, the CWN confirms that it has not listened to the first downlink signal. In one example, the indication information can be an indication sequence or an indicator. In one example, the indication information can be an identifier of the CWN associated with the reader.

[0246] In some embodiments, a specific downlink signal can be a downlink signal with a signal strength greater than or equal to a preset value. In one embodiment, the CWN is configured with a signal strength threshold (such as a preset value). Therefore, when the CWN listens for downlink signals, it can only listen for downlink signals with a signal strength greater than or equal to the preset value (such as a first downlink signal). If the CWN receives a downlink signal with a signal strength greater than or equal to the preset value, it confirms that it has listened to the first downlink signal. In one example, after receiving multiple downlink signals, the CWN performs energy detection on the multiple downlink signals to determine whether there is a downlink signal with a signal strength greater than or equal to the preset value among the received downlink signals. If so, the CWN can confirm that it has listened to the first downlink signal. Otherwise, the CWN confirms that it has not listened to the first downlink signal. In one example, the preset value can be pre-configured, as specified in the protocol, or configured by the network device or reader / writer; this disclosure does not specifically limit this.

[0247] It should be noted that steps S2102 and S2103 can be executed simultaneously, sequentially, or in an interchangeable order; this embodiment does not limit the execution order.

[0248] In step S2104, CWN transmits the first carrier.

[0249] In some embodiments, the AIoT device receives a first carrier and backscatters the first carrier.

[0250] In some embodiments, the CWN transmits a first carrier upon detecting a first downlink indication.

[0251] In some embodiments, when the CWN detects a first downlink indication, the CWN transmits a first carrier according to information A. In some embodiments, the CWN transmits the first carrier according to at least one of a second indication, a third indication, a fourth indication, a fifth indication, a sixth indication, and a seventh indication.

[0252] In some embodiments, the second indication information indicates a fourth duration of T. R2D In this case, CWN transmits the first carrier immediately after ending reception of the first downlink signal. In some embodiments, the second indication information indicates a fourth duration of T. R2D+ In the case of Tgap (Tgap≠0), the CWN transmits the first carrier at a Tgap interval after ending the reception of the first downlink signal. In one example, Figure 3C is a schematic diagram of the first carrier transmission timing provided according to an embodiment of the present disclosure. Referring to Figure 3C, the CWN detects R2D at time t0 and immediately transmits the first carrier at the end time t1 of R2D. Figure 3D is another schematic diagram of the first carrier transmission timing provided according to an embodiment of the present disclosure. Referring to Figure 3D, the CWN detects R2D at time t0 and transmits the first carrier at a Tgap interval t2 after the end time t1 of R2D.

[0253] In some embodiments, when the third indication information indicates a single-frequency sine wave, the CWN transmits a single-frequency sine wave. In some embodiments, when the third indication information indicates multiple single-frequency sine waves, the CWN transmits multiple single-frequency sine waves.

[0254] In some embodiments, when the third indication information indicates a single-frequency sine wave and the seventh indication information indicates a second duration of T, the CWN transmits a single-frequency sine wave for a duration of T. In some embodiments, when the third indication information indicates multiple single-frequency sine waves and the seventh indication information indicates a second duration of T, the CWN transmits multiple single-frequency sine waves, each single-frequency sine wave lasting for a duration of T.

[0255] In some embodiments, when the fourth indication information indicates a single transmission, the CWN transmits the first carrier once on one time-domain resource. In some embodiments, when the fourth indication information indicates multiple transmissions, the CWN transmits the first carrier once on multiple time-domain resources.

[0256] In some embodiments, when the third indication information indicates a single-frequency sine wave and the fourth indication information indicates a single transmission, the CWN transmits a single-frequency sine wave on one time-domain resource. In some embodiments, when the third indication information indicates multiple single-frequency sine waves and the fourth indication information indicates multiple transmissions, the CWN transmits a single-frequency sine wave on multiple time-domain resources. In some embodiments, when the third indication information indicates multiple single-frequency sine waves and the fourth indication information indicates a single transmission, the CWN transmits multiple single-frequency sine waves on one time-domain resource, wherein the transmission frequencies of the multiple single-frequency sine waves are different. In some embodiments, when the third indication information indicates multiple single-frequency sine waves and the fourth indication information indicates multiple transmissions, the CWN transmits multiple single-frequency sine waves on multiple time-domain resources, wherein the transmission frequencies of the multiple single-frequency sine waves on each time-domain resource are different.

[0257] In some embodiments, when the fourth indication information indicates multiple transmissions and the fifth indication information indicates a third duration of Tgap1, the CWN sequentially transmits the first carrier at equal intervals of Tgap1 on multiple time-domain resources. In some embodiments, when the fourth indication information indicates multiple transmissions and the fifth indication information indicates a third duration of Tgap1, the CWN transmits the first carrier on multiple time-domain resources, with adjacent time-domain resources spaced apart by Tgap1.

[0258] In some embodiments, when the third indication information indicates multiple single-frequency sine waves and the sixth information indicates transmission frequencies of f0, f1, f2, f3, ..., the CWN transmits multiple single-frequency sine waves with transmission frequencies of f0, f1, f2, f3, ... . In one example, carrier 0 has a frequency of f0, carrier 1 has a frequency of f1, carrier 2 has a frequency of f2, and carrier 3 has a frequency of f3, with fgap1 = fgap2 = fgap3. In another example, carrier 0 has a frequency of f0, carrier 1 has a frequency of f1, carrier 2 has a frequency of f2, and carrier 3 has a frequency of f3, with fgap1 ≠ fgap2 ≠ fgap3. In yet another example, carrier 0 has a frequency of f0, carrier 1 has a frequency of f1, carrier 2 has a frequency of f2, and carrier 3 has a frequency of f3, with fgap1 = fgap2 ≠ fgap3.

[0259] In step S2105, the AIoT device sends a first uplink signal.

[0260] In some embodiments, after receiving the first carrier, the AIoT device modulates the uplink signaling onto the first carrier and backscatters it, thereby transmitting the first uplink information.

[0261] In some embodiments, the first uplink signal is an associated uplink signal of the first downlink information. In some embodiments, the first uplink signal is a response signal of the first downlink information. In some embodiments, the first uplink signal is an acknowledgment signal of the first downlink information.

[0262] In some embodiments, because the clock and oscillator of the AIoT device itself are not very accurate, in order to ensure that the AIoT device has a first carrier when sending the first uplink signal, the CWN needs to send the first carrier to the AIoT device in advance. This can compensate for the deviation caused by the inaccuracy of the AIoT device's clock. For example, the first carrier can be shifted forward in the time domain relative to the first uplink signal, or the first uplink signal can be shifted backward in the time domain relative to the first carrier. After the shift, the interval between the first uplink signal and the first carrier is five time intervals.

[0263] In one example, Figure 3E is another schematic diagram of the first carrier transmission timing provided according to an embodiment of the present disclosure. Referring to Figure 3E, the CWN transmits the first carrier at a first time interval (e.g., Tgap) with Tgap ≥ 0, and the preceding R2D (e.g., the first downlink signal) is spaced at a fifth time interval (e.g., Tgap2) with Tgap2 ≥ 0, and the preceding associated R2D (e.g., the first downlink signal) is transmitted by the AIoT device at a fifth time interval (e.g., Tgap2). Since the CWN transmits the first carrier to the AIoT device in advance, Tgap ≤ Tgap2.

[0264] This completes the transmission control of the first carrier wave.

[0265] In some embodiments, the first duration, the second duration, and the third duration are the length of a time unit, such as 1 second (s), 1 microsecond (ms), 1 picosecond (ps), 1 slot, 1 symbol, 1 cyclic prefix (cp), etc.

[0266] In some embodiments, the terms “sending duration”, “receiving duration”, and “transmission duration” can be used interchangeably.

[0267] In some embodiments, the terms “carrying,” “including,” “containing,” and “encapsulating” can be used interchangeably.

[0268] In some embodiments, the terms “radio”, “wireless”, “radio access network (RAN)”, “access network (AN)”, and “RAN-based” can be used interchangeably.

[0269] In some embodiments, “get,” “obtain,” “receive,” “transmit,” “bidirectional transmission,” and “send and / or receive” can be used interchangeably and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining through self-processing, or autonomous implementation, among other meanings.

[0270] In some embodiments, terms such as “send,” “transmit,” “report,” “transmit,” “request,” “bidirectional transmission,” “send and / or receive” can be used interchangeably.

[0271] In some embodiments, the terms “issue,” “return,” “feedback,” “response,” and “acknowledgement” can be used interchangeably.

[0272] In some embodiments, terms such as "certain," "preset," "default," "set," "indicated," "a certain," "any," and "first" can be used interchangeably. "Certain A," "preset A," "default A," "set A," "indicated A," "a certain A," "any A," and "first A" can be interpreted as A pre-defined in a protocol or the like, or as A obtained through setting, configuration, or instruction, or as specific A, a certain A, any A, or first A, but are not limited thereto.

[0273] In some embodiments, the determination or judgment can be made by a value represented by 1 bit (0 or 1), or by a true or false value (boolean), or by a comparison of numerical values ​​(e.g., a comparison with a predetermined value), but is not limited thereto.

[0274] The communication method involved in the embodiments of this disclosure may include at least one of steps S2101 to S2105. For example, step S2101 may be implemented as a standalone embodiment. For example, step S2102 may be implemented as a standalone embodiment. For example, step S2103 may be implemented as a standalone embodiment. For example, step S2104 may be implemented as a standalone embodiment. For example, steps S2102 to S2104 may be combined as a standalone embodiment. For example, steps S2101 to S2104 may be combined as a standalone embodiment. For example, steps S2102 to S2105 may be combined as a standalone embodiment. For example, steps S2101 to S2105 may be combined as a standalone embodiment.

[0275] Figure 2B is another interactive schematic diagram of the communication method provided according to an embodiment of the present disclosure. As shown in Figure 2B, the present disclosure relates to a communication method. Executed by a communication system 100, the communication method includes steps S2201 to S2205.

[0276] In this embodiment of the disclosure, the first node is a CWN, the second and third nodes are the same node, such as a reader / writer, and the first device is an AIoT device, as an example for illustration.

[0277] In some embodiments, the CWN supports AIoT service reception, such as receiving R2D. In some embodiments, the CWN supports AIoT service transmission, such as transmitting CW2D. In some embodiments, the CWN supports both AIoT service reception and AIoT service transmission.

[0278] In some embodiments, the third node may also be a UR, a network device, etc., and its execution process can be referred to in steps S2201 to S2205 below. This embodiment will not elaborate on this.

[0279] In step S2201, CWN monitors the first downlink signal.

[0280] In some embodiments of AIoT, the CWN and the reader / writer are located in close proximity. For example, the CWN and the reader / writer are deployed on the same device; or, the CWN and the reader / writer are deployed on different devices that are relatively close to each other. In this case, when the reader / writer sends an R2D transmission, its downlink signal can cover the CWN. Therefore, if the reader / writer sends a first downlink signal, the CWN can receive the first downlink signal sent by the reader / writer. In this situation, the CWN can enter an R2D listening mode to listen for the first downlink signal sent by the reader / writer.

[0281] In step S2202, the reader sends a first downlink signal.

[0282] In some embodiments, the AIoT device receives a first downlink signal.

[0283] In some embodiments, the CWN receives a first downlink signal.

[0284] In some embodiments, after the CWN enters the R2D listening mode, the reader sends a first downlink signal, at which time the CWN receives the first downlink signal. In some embodiments, the first downlink signal carries a downlink command sent by the reader to the AIoT device.

[0285] In some embodiments, the first downlink signal can be any downlink signal. Therefore, as long as the CWN receives the downlink signal, it can determine that it has detected the first downlink signal. In this case, the first carrier wave is transmitted.

[0286] In some embodiments, the first downlink signal can be a specific downlink signal. Therefore, the CWN can only determine that it has detected the first downlink signal if it receives the specific downlink signal. In this case, the CWN transmits the first carrier wave.

[0287] In some embodiments, a specific downlink signal can be a downlink signal sent by a reader associated with a CWN. In one embodiment, the network device or reader can determine the association between the reader and the CWN. Then, when the CWN listens for downlink signals, it can only listen for downlink signals sent by the associated reader (such as a first downlink signal). Upon receiving the first downlink signal, the CWN confirms that it has listened to the first downlink signal. In one example, the reader can carry indication information in the first downlink signal, which indicates the CWN associated with the reader. Then, after receiving the downlink signal, the CWN can determine whether the CWN indicated by the indication information in the downlink signal matches itself by performing sequence detection, decoding, and other processing on the downlink signal. If they match, the CWN can confirm that it has listened to the first downlink signal. Otherwise, the CWN confirms that it has not listened to the first downlink signal. In one example, the indication information can be an indication sequence or an indicator. In one example, the indication information can be an identifier of the CWN associated with the reader.

[0288] In some embodiments, a specific downlink signal can be a downlink signal with a signal strength greater than or equal to a preset value. In one embodiment, the CWN is configured with a signal strength threshold (such as a preset value). Therefore, when the CWN listens for downlink signals, it can only listen for downlink signals with a signal strength greater than or equal to the preset value (such as a first downlink signal). If the CWN receives a downlink signal with a signal strength greater than or equal to the preset value, it confirms that it has listened to the first downlink signal. In one example, after receiving multiple downlink signals, the CWN performs energy detection on the multiple downlink signals to determine whether there is a downlink signal with a signal strength greater than or equal to the preset value among the received downlink signals. If so, the CWN can confirm that it has listened to the first downlink signal. Otherwise, the CWN confirms that it has not listened to the first downlink signal. In one example, the preset value can be pre-configured, as specified in the protocol, or configured by the network device or reader / writer; this disclosure does not specifically limit this.

[0289] In some embodiments, the first downlink signal carries information B. In this case, the first information is information B.

[0290] In some embodiments, information B is used to indicate the carrier configuration of the CWN. In some embodiments, information B is used to indicate the carrier configuration of the CWN when a first downlink signal is detected. In some embodiments, information B is used to indicate the carrier configuration of the CWN when R2D is detected. In some embodiments, information B is used to indicate the carrier configuration of the CWN. In some embodiments, information B is used to indicate the carrier configuration of the CWN when a first downlink signal is detected. In some embodiments, information B is used to indicate the carrier configuration of the CWN when R2D is detected. In some embodiments, information B is used to indicate the configuration of the first carrier transmitted by the CWN. In some embodiments, information B is used to indicate the configuration of the first carrier transmitted by the CWN when a first downlink signal is detected. In some embodiments, information B is used to indicate the configuration of the first carrier transmitted by the CWN when a first downlink signal is detected. In some embodiments, the first downlink signal is a downlink signal transmitted by the reader to the AIoT device. In some embodiments, the first carrier is a carrier transmitted by the CWN to the AIoT device receiving the first downlink signal, and the first carrier is used by the AIoT device to transmit an uplink signal associated with the first downlink signal.

[0291] In some embodiments, information B can be the initial configuration of the CWN by the reader / writer, or it can be the reconfiguration of the CWN by the reader / writer. In some embodiments, the reconfiguration of the CWN by the reader / writer can be triggered by the reader / writer, such as periodic configuration or dynamic configuration. In some embodiments, the reconfiguration of the CWN by the reader / writer can also be requested by the CWN, such as the CWN requesting a change in carrier configuration based on its own power level, hardware status, etc. In some embodiments, when information B is the reconfiguration of the CWN by the reader / writer, information B is used to indicate the new carrier configuration so that the CWN can apply the newly configured carrier in subsequent processes.

[0292] In some embodiments, the name of information B is not specifically limited, for example, configuration information, carrier configuration information, reconfiguration information, carrier reconfiguration information, configuration change information, configuration modification information, carrier modification information, carrier configuration modification information, etc.

[0293] In some embodiments, information B includes at least one of the following: first instruction information, second instruction information, third instruction information, fourth instruction information, fifth instruction information, sixth instruction information, and seventh instruction information.

[0294] In some embodiments, the first indication information is used to indicate whether to transmit the first carrier. In this case, the first indication information is indicated by the reader / writer.

[0295] In some embodiments, the first downlink signal includes a first information field for indicating whether to transmit the first carrier. That is, the first signal field of the first downlink signal carries indication information A (such as first indication information) for indicating whether to transmit the first carrier. If the indication information A is a first value (e.g., 1), it indicates that the first carrier should be transmitted. If the indication information A is a second value (e.g., 0), it indicates that the first carrier should not be transmitted. Thus, the CWN can determine whether to transmit the first carrier based on the indication of the indication information A.

[0296] In some embodiments, the first downlink signal includes a second information field, which indicates whether an associated uplink signal exists in the first downlink signal, thereby implicitly indicating whether to transmit the first carrier. That is, the second information field in the first downlink signal carries indication information B (such as first indication information) indicating whether an associated uplink signal exists in the first downlink signal. The value of indication information B indicates whether to transmit the first carrier while simultaneously indicating whether an associated uplink signal exists in the first downlink signal. If indication information B is a first value (e.g., 1), it indicates that an associated uplink signal exists in the first downlink signal, thereby indicating whether to transmit the first carrier. If indication information B is a second value (e.g., 0), it indicates that no associated uplink signal exists in the first downlink signal, thereby indicating whether to transmit the first carrier. Thus, the CWN can determine whether to transmit the first carrier based on the indication of indication information B by determining whether an associated uplink signal exists in the first downlink signal.

[0297] In some embodiments, the presence of an associated uplink signal in the first downlink signal can be understood as the AIoT device needing to send an associated D2R transmission after receiving an R2D transmission. In this case, the R2D transmission can be a device-initiated–device-terminated triggered (DO-DTT) service, such as an inventory management service. In some embodiments, the absence of an associated uplink signal in the first downlink signal can be understood as the AIoT device not needing to send a D2R transmission after receiving an R2D transmission. In this case, the R2D transmission can be a device-terminated (DO) service, such as an access service.

[0298] In some embodiments, whether to send the first carrier can also be pre-configured, such as as specified by the protocol, or determined by the CWN according to its own implementation. In this case, information B may not include the first indication information.

[0299] In some embodiments, whether to send the first carrier can also be determined by the CWN based on the service associated with the first downlink signal. In this case, information B may not include the first indication information.

[0300] In some embodiments, information B may be included in the downlink instructions sent by the reader to the AIoT device.

[0301] In some embodiments, information B may also be sent by network devices, such as base stations, in which case information B is included in downlink higher-layer signaling.

[0302] In some embodiments, when information B is a reconfiguration of the CWN by the reader, the reader may instruct a change to at least one of the following: transmitting or not transmitting a first carrier, a second duration, the carrier type of the first carrier, the number of transmissions of the first carrier, a third duration, the transmission frequency of the first carrier, and a fourth duration. In one example, if the currently transmitted carrier is a single-frequency sine wave, information B may instruct the CWN to subsequently transmit two single-frequency sine waves. In one example, if the frequency of the single-frequency sine wave contained in the currently transmitted first carrier is f1, information B may instruct the CWN to subsequently transmit single-frequency sine waves with frequencies f2 and f3, respectively.

[0303] It should be noted that steps S2201 and S2202 can be executed simultaneously, sequentially, or in an interchangeable order. This embodiment does not limit the execution order.

[0304] In step S2203, CWN determines whether to transmit the first carrier.

[0305] In some embodiments, the CWN determines to transmit the first carrier based on information B.

[0306] In some embodiments, if the first indication information indicates that the first carrier should be transmitted, the CWN determines to transmit the first carrier. In some embodiments, if the first indication information indicates that the first carrier should not be transmitted, the CWN determines not to transmit the first carrier.

[0307] In some embodiments, the CWN determines to transmit a first carrier based on the service associated with the first downlink signal. In some embodiments, the first downlink signal includes downlink instructions. After receiving the first downlink signal, the CWN can demodulate it to obtain the downlink instructions carried on it. Then, based on the downlink instructions, the CWN can determine the service associated with the first downlink signal, the downlink instructions carried by the first downlink signal, etc., and accordingly, determine whether the first downlink signal has an associated uplink signal. If the first downlink signal has an associated uplink signal, the CWN determines to transmit the first carrier. If the first downlink signal does not have an associated uplink signal, the CWN determines not to transmit the first carrier.

[0308] In one example, when a first downlink signal has an associated uplink signal, the service associated with the first downlink signal can be a DO-DTT service, such as an inventory management service. In some embodiments, when the first downlink signal does not have an associated uplink signal, the service associated with the first downlink signal can be a DO-enabled service, such as an access service.

[0309] In some embodiments, step S2203 can be omitted. In this case, whether to send the first carrier is pre-configured, and CWN will send the first carrier or not send the first carrier by default.

[0310] In some embodiments, if CWN determines that the first carrier should be transmitted, step S2204 is performed.

[0311] In step S2204, CWN transmits the first carrier.

[0312] The optional implementation of step S2204 can be found in the optional implementation of step S2104 in Figure 2A and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0313] In step S2205, the AIoT device sends a first uplink signal.

[0314] The optional implementation of step S2205 can be found in the optional implementation of step S2105 in Figure 2A and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0315] In some embodiments, when the reader sends an R2D to the AIoT device, it can assume that the CWN can also receive the R2D. Therefore, the R2D can include indication information (such as information B) that instructs the CWN on how to transmit the carrier. Moreover, the reader can assume that after receiving the indication signal in the R2D, the CWN will determine the specific characteristics of the transmitted carrier according to the specific content of the indication information, such as the start time of the transmitted carrier, the duration of continuous carrier transmission, whether to transmit a single frequency sine wave or multiple single frequency sine waves, and the frequency of each sine wave.

[0316] This completes the transmission control of the first carrier wave.

[0317] In this embodiment of the disclosure, the first node listens to the downlink transmission (such as R2D) between the second node and the first device. After the downlink transmission, there is usually an uplink transmission (such as D2R). When the first node listens to / receives the downlink transmission, the first node can start sending the first carrier after the first downlink signal at a second time interval, so that the first device can perform backscattering. This eliminates the signaling overhead dedicated to controlling the first node, greatly improves the communication efficiency of the entire AIoT system, and reduces the frequency of signaling interaction between air interfaces.

[0318] Furthermore, since the first information is carried in the first downlink signal, signaling overhead is further reduced, and the frequency of signaling interaction between air interfaces is decreased.

[0319] The communication method involved in the embodiments of this disclosure may include at least one of steps S2201 to S2205. For example, step S2201 may be implemented as a standalone embodiment. For example, step S2202 may be implemented as a standalone embodiment. For example, step S2203 may be implemented as a standalone embodiment. For example, step S2204 may be implemented as a standalone embodiment. For example, steps S2201, S2202, and S2204 may be combined as a standalone embodiment. For example, steps S2201 to S2204 may be combined as a standalone embodiment. For example, steps S2201, S2202, S2204, and S2205 may be combined as a standalone embodiment. For example, steps S2201 to S2205 may be combined as a standalone embodiment.

[0320] Figure 2C is another interactive schematic diagram of the communication method provided according to an embodiment of the present disclosure. As shown in Figure 2C, the present disclosure relates to a communication method. Executed by a communication system 100, the communication method includes steps S2301 to S2304.

[0321] In this embodiment of the disclosure, the first node is a CWN, the second and third nodes are the same node, such as a reader / writer, and the first device is an AIoT device, as an example for illustration.

[0322] In some embodiments, the CWN supports AIoT service reception, such as receiving R2D. In some embodiments, the CWN supports AIoT service transmission, such as transmitting CW2D. In some embodiments, the CWN supports both AIoT service reception and AIoT service transmission.

[0323] In some embodiments, the third node may also be a UR, a network device, etc., and its execution process can be referred to in steps S2301 to S2304 below. This embodiment will not elaborate on this.

[0324] In step S2301, the reader sends information A.

[0325] The optional implementation of step S2301 can be found in the optional implementation of step S2101 in Figure 2A and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0326] In step S2302, CWN continuously transmits the first carrier.

[0327] In some embodiments, the CWN continuously transmits the first carrier according to information A.

[0328] The optional implementation of step S2302 can be found in the optional implementation of step S2104 in Figure 2A and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0329] In step S2303, the reader sends a first downlink signal.

[0330] In some embodiments, the AIoT device receives a first downlink signal.

[0331] The optional implementation of step S2303 can be found in the optional implementation of step S2103 in Figure 2A and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0332] In step S2304, the AIoT device sends a first uplink signal.

[0333] The optional implementation of step S2304 can be found in the optional implementation of step S2105 in Figure 2A and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0334] This completes the transmission control of the first carrier wave.

[0335] In this embodiment, the CWN continuously outputs the first carrier, which the AIoT device can use at any time for backscattering, thereby eliminating the signaling overhead dedicated to controlling the first node, greatly improving the communication efficiency of the entire AIoT system, and reducing the frequency of signaling interactions between air interfaces.

[0336] The communication method involved in the embodiments of this disclosure may include at least one of steps S2301 to S2304. For example, step S2301 may be implemented as a standalone embodiment. For example, step S2302 may be implemented as a standalone embodiment. For example, step S2303 may be implemented as a standalone embodiment. For example, step S2304 may be implemented as a standalone embodiment. For example, steps S2301 and S2302 may be combined as a standalone embodiment. For example, steps S2301 to S2303 may be combined as a standalone embodiment. For example, steps S2301 to S2304 may be combined as a standalone embodiment.

[0337] Figure 4 is a flowchart illustrating a communication method executed by a third node according to an embodiment of the present disclosure. As shown in Figure 4, the embodiment of the present disclosure relates to a communication method executed by a third node, such as a reader / writer. The communication method includes steps S401 to S402.

[0338] In step S401, the first information is sent.

[0339] In some embodiments, the first information is information A.

[0340] The optional implementation of step S401 can be found in the optional implementation of step S2101 in Figure 2A, the optional implementation of step S2301 in Figure 2C, and other related parts in the embodiments involved in Figures 2A and 2C, which will not be repeated here.

[0341] In step S402, a first downlink signal is sent.

[0342] The optional implementation of step S402 can be found in the optional implementation of step S2103 in Figure 2A, the optional implementation of step S2301 in Figure 2C, and other related parts in the embodiments involved in Figures 2A and 2C, which will not be repeated here.

[0343] The communication method involved in the embodiments of this disclosure may include at least one of steps S401 to S402. For example, step S401 may be implemented as a standalone embodiment. For example, step S402 may be implemented as a standalone embodiment. For example, steps S401 to S402 may be combined as a standalone embodiment.

[0344] This disclosure also provides a communication method executed by a third node, such as a reader / writer, the communication method comprising the following steps:

[0345] In step one, the first downlink signal is sent.

[0346] In some embodiments, the first downlink signal carries information B, where the first information is information B.

[0347] The optional implementation of step one can be found in the optional implementation of step S2202 in Figure 2B and other related parts in the embodiments involved in Figure 2B, which will not be repeated here.

[0348] Figure 5A is a schematic flowchart of a first type of communication method performed on the first node side according to an embodiment of the present disclosure. As shown in Figure 5A, the present disclosure relates to a communication method. Performed by a first node, such as a CWN, the communication method includes steps S5101 to S5104.

[0349] In step S5101, the first information is received.

[0350] In some embodiments, the first information is information A.

[0351] The optional implementation of step S5101 can be found in the optional implementation of step S2101 in Figure 2A and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0352] In step S5102, the first downlink signal is monitored.

[0353] The optional implementation of step S5102 can be found in the optional implementation of step S2102 in Figure 2A and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0354] In step S5103, the first downlink signal is received.

[0355] The optional implementation of step S5103 can be found in the optional implementation of step S2103 in Figure 2A and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0356] In step S5104, the first carrier wave is transmitted.

[0357] The optional implementation of step S5104 can be found in the optional implementation of step S2104 in Figure 2A and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0358] The communication method involved in the embodiments of this disclosure may include at least one of steps S5101 to S5104. For example, step S5101 may be implemented as a standalone embodiment. For example, step S5102 may be implemented as a standalone embodiment. For example, step S5103 may be implemented as a standalone embodiment. For example, step S5104 may be implemented as a standalone embodiment. For example, steps S5102 to S5104 may be combined as a standalone embodiment. For example, steps S5101 to S5104 may be combined as a standalone embodiment.

[0359] Figure 5B is a second flowchart illustrating a communication method executed on the first node side according to an embodiment of the present disclosure. As shown in Figure 5B, this embodiment of the disclosure relates to a communication method. Executed by a first node, such as a CWN, the communication method includes steps S5201 to S5204.

[0360] In step S5201, the first downlink signal is monitored.

[0361] The optional implementation of step S5201 can be found in the optional implementation of step S2201 in Figure 2B and other related parts in the embodiments involved in Figure 2B, which will not be repeated here.

[0362] In step S5202, the first downlink signal is received.

[0363] In some embodiments, the first downlink signal carries first information, where the first information is information B.

[0364] The optional implementation of step S5202 can be found in the optional implementation of step S2202 in Figure 2B and other related parts in the embodiments involved in Figure 2B, which will not be repeated here.

[0365] In step S5203, it is determined whether to send the first carrier.

[0366] The optional implementation of step S5203 can be found in the optional implementation of step S2203 in Figure 2B and other related parts in the embodiments involved in Figure 2B, which will not be repeated here.

[0367] In some embodiments, if CWN determines that the first carrier should be transmitted, step S5204 is performed.

[0368] In step S5204, the first carrier wave is transmitted.

[0369] The optional implementation of step S5204 can be found in the optional implementation of step S2204 in Figure 2B and other related parts in the embodiments involved in Figure 2B, which will not be repeated here.

[0370] The communication method involved in the embodiments of this disclosure may include at least one of steps S5201 to S5204. For example, step S5201 may be implemented as a standalone embodiment. For example, step S5202 may be implemented as a standalone embodiment. For example, step S5203 may be implemented as a standalone embodiment. For example, step S5204 may be implemented as a standalone embodiment. For example, steps S5201, S5202, and S5204 may be combined as a standalone embodiment. For example, steps S5201 to S5204 may be combined as a standalone embodiment.

[0371] Figure 5C is a third flowchart illustrating a communication method performed on the first node side according to an embodiment of the present disclosure. As shown in Figure 5C, this embodiment of the present disclosure relates to a communication method. Performed by a first node, such as CWN, the communication method includes steps S5301 to S5302.

[0372] In step S5301, the first information is received.

[0373] The optional implementation of step S5301 can be found in the optional implementation of step S2101 in Figure 2A, the optional implementation of step S2301 in Figure 2C, and other related parts in the embodiments involved in Figures 2A and 2C, which will not be repeated here.

[0374] In step S5302, the first carrier wave is transmitted.

[0375] The optional implementation of step S5302 can be found in the optional implementation of step S2104 in Figure 2A, the optional implementation of step S2302 in Figure 2C, and other related parts in the embodiments involved in Figures 2A and 2C, which will not be repeated here.

[0376] The communication method involved in the embodiments of this disclosure may include at least one of steps S5301 to S5302. For example, step S5301 may be implemented as a standalone embodiment. For example, step S5302 may be implemented as a standalone embodiment. For example, steps S5301 and S5302 may be combined as a standalone embodiment.

[0377] Figure 6A is a schematic flowchart illustrating a fourth type of communication method executed by a first node according to an embodiment of the present disclosure. As shown in Figure 6A, this embodiment of the present disclosure relates to a communication method executed by a first node. The communication method includes step S6101.

[0378] In step S6101, the first downlink signal is monitored.

[0379] The optional implementation of step S6101 can be found in the optional implementation of step S2102 in Figure 2A and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0380] Figure 6B is a schematic flowchart illustrating another communication method executed on the third node side according to an embodiment of the present disclosure. As shown in Figure 6B, the embodiment of the present disclosure relates to a communication method executed by a third node. The above-described communication method includes step S6201.

[0381] In step S6201, the first information is sent.

[0382] In some embodiments, the first information includes information A or information B.

[0383] The optional implementation of step S6201 can be found in the optional implementation of step S2108 in Figure 2A and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0384] In the following, the technical solutions of the embodiments of this disclosure will be described by way of specific implementation.

[0385] This disclosure provides an AIoT system in which a CWN (such as a first node) determines the time-frequency characteristics of its next CW (such as a first carrier) transmission by listening to the R2D (physical layer carried on PRDCH) sent by a reader (such as a third node) to the AIoT device.

[0386] In some embodiments, CWN starts sending CW after detecting R2D.

[0387] In some embodiments, after CWN detects R2D, it starts sending CW after an interval of Tgap (such as a first duration).

[0388] In some embodiments, after CWN detects R2D, the information sent by R2D includes a set of instruction information (such as first information) instructing CWN to send CW. CWN determines whether to send CW, how to send CW, and the frequency of each single-frequency sine wave corresponding to CW based on the set of instruction information.

[0389] In some embodiments, CWN always transmits CW to provide AIoT devices with CW for backscattering.

[0390] In some embodiments, within an AIoT system, the CWN determines its CW transmission characteristics by listening to R2D.

[0391] Option 1: After CWN detects R2D, it begins to transmit a carrier.

[0392] In some embodiments, the CWN is in a listening / receiving state, and immediately begins transmitting a carrier after receiving an R2D sent by at least one reader.

[0393] In some embodiments, CWN needs to have the ability to receive and / or transmit AIoT services, such as supporting the reception of R2D.

[0394] In some embodiments, the above-mentioned immediate transmission means that the interval between the end time of CWN receiving R2D and the start time of CWN transmitting the carrier is 0.

[0395] In some embodiments, the characteristics of the CW transmitted above include at least one of the following:

[0396] (1) A single-frequency sine wave;

[0397] (2) Two single-frequency sine waves;

[0398] (3) N > 2 single-frequency sine waves;

[0399] (4) When N>1, the interval between the frequencies of two adjacent sine waves is fgap.

[0400] (5) The transmission frequencies of one or more single-frequency sine waves contained in CW are f0, f1, f2, ...

[0401] In some embodiments, the transmission characteristics of CW include at least one of the following:

[0402] (1) Only one transmission. CWN transmits a continuous carrier once, and the duration of the continuous transmission is T1.

[0403] (2) Multiple equally spaced transmissions. CWN transmits K carriers, with each transmission lasting for a continuous time of T2, and the interval between two adjacent transmissions is Tgap1. K is a positive integer.

[0404] In some embodiments, Tgap1 and Tgap may be equal or unequal.

[0405] In some embodiments, the CW sent by the CWN includes the above-mentioned characteristics, which can be determined by at least one of the following methods:

[0406] Method 1: Determined through configuration.

[0407] In some embodiments, the CWN determines the aforementioned characteristics of the transmitted carrier based on the received set of configuration information.

[0408] In some embodiments, the network / base station sends a set of configuration information to the CWN. The set of configuration information is carried by higher-layer signaling, including but not limited to RRC signaling and / or system messages.

[0409] In some embodiments, the configuration information set includes at least one of the characteristics of CW (1), (2), (3), and (4).

[0410] Method 2: Determined through instructions.

[0411] In some embodiments, the CWN determines the aforementioned characteristics of the transmitted carrier based on the received set of indication information.

[0412] In some embodiments, the reader sends a set of indication information to the CWN, wherein the reader is at least one of the base station, the intermediate node of the AIoT system, and other devices.

[0413] In some embodiments, the set of indication information includes at least one of the characteristics of CW (1), (2), (3), and (4).

[0414] Method 3: Determined through pre-configuration.

[0415] In some embodiments, CWN determines at least one of the characteristics of CW (1), (2), (3), and (4) based on at least one of pre-configuration and its own specific implementation.

[0416] Option 2: After CWN detects R2D, it starts transmitting the carrier after an interval of Tgap.

[0417] In some embodiments, the CWN is in a listening / receiving state. After the CWN receives an R2D sent by at least one reader, it starts transmitting a carrier after a time interval of at least Tgap.

[0418] In some embodiments, CWN needs to have the ability to receive and / or transmit A-IoT services, such as supporting R2D reception.

[0419] In some embodiments, the aforementioned time interval refers to the interval between the end time of CWN receiving R2D and the start time of CWN transmitting the carrier, which is at least Tgap, wherein the unit of Tgap can be at least one of microseconds, milliseconds, seconds, time slots, subframes, and frames.

[0420] In some embodiments, the value of Tgap is greater than or equal to 0. When Tgap = 0, Scheme 2 is equivalent to Scheme 1.

[0421] In some embodiments, Tgap≤Tgap2, where Tgap2 is the minimum time interval between the AIoT device receiving R2D and sending associated D2R.

[0422] In some embodiments, Tgap can originate from at least one of the following:

[0423] The configuration of CWN is transmitted from the network / base station via RRC signaling, system messages, etc.

[0424] The information is sent from the reader (base station or intermediate node UE) to the CWN, carried by PDCCH / PDSCH and by PRDCH.

[0425] The configuration method is determined by CWN based on the protocol specifications or specific implementation.

[0426] In some embodiments, the characteristics of the CW transmitted above include at least one of the following:

[0427] (1) A single-frequency sine wave;

[0428] (2) Two single-frequency sine waves;

[0429] (3) N > 2 single-frequency sine waves;

[0430] (4) When N>1, the interval between the frequencies of two adjacent sine waves is fgap.

[0431] (5) The transmission frequencies of one or more single-frequency sine waves contained in CW are f0, f1, f2, ...

[0432] In some embodiments, the transmission characteristics of CW include at least one of the following:

[0433] (1) Only one transmission. CWN transmits a continuous carrier once, and the duration of the continuous transmission is T1.

[0434] (2) Multiple equally spaced transmissions. CWN transmits K carriers, with each transmission lasting for a continuous time of T2, and the interval between two adjacent transmissions is Tgap1. K is a positive integer.

[0435] In some embodiments, Tgap1 and Tgap may be equal or unequal.

[0436] In some embodiments, the CW sent by the CWN includes the above-mentioned characteristics, which can be determined by at least one of the following methods:

[0437] Method 1: Determined through configuration.

[0438] In some embodiments, the CWN determines the aforementioned characteristics of the transmitted carrier based on the received set of configuration information.

[0439] In some embodiments, the network / base station sends a set of configuration information to the CWN. The set of configuration information is carried by higher-layer signaling, including but not limited to RRC signaling and / or system messages.

[0440] In some embodiments, the configuration information set includes at least one of the characteristics of CW (1), (2), (3), and (4).

[0441] Method 2: Determined through instructions.

[0442] In some embodiments, the CWN determines the aforementioned characteristics of the transmitted carrier based on the received set of indication information.

[0443] In some embodiments, the reader sends a set of indication information to the CWN, wherein the reader is at least one of the base station, the intermediate node of the AIoT system, and other devices.

[0444] In some embodiments, the set of indication information includes at least one of the characteristics of CW (1), (2), (3), and (4).

[0445] Method 3: Determined through pre-configuration.

[0446] In some embodiments, CWN determines at least one of the characteristics of CW (1), (2), (3), and (4) based on at least one of pre-configuration and its own specific implementation.

[0447] Option 3: After CWN detects R2D, the information sent by R2D contains a set of indication information that instructs CWN to send a carrier. CWN determines the characteristics of the carrier to be sent based on the set of indication information.

[0448] In some embodiments, when the reader sends R2D to the AIoT device, it includes, in addition to system and service messages, indication information or a set of indication information that instructs the CWN to transmit a carrier.

[0449] In some embodiments, CWN needs to have the ability to receive and / or transmit A-IoT services, such as supporting R2D reception.

[0450] In some embodiments, the above indication information or set of indication information includes at least one of the following:

[0451] ON / OFF indication (as in the first indication information): ON indicates that the CWN begins transmitting the carrier. The CWN determines the characteristics of the transmitted carrier according to the specific method in Scheme 2 or 1. The ON / OFF indication includes at least one of the following methods:

[0452] Method 1: Use a 1-bit information field to indicate ON / OFF. ON indicates that CWN needs to transmit a carrier, OFF indicates that CWN does not need to transmit a carrier.

[0453] Method 2: R2D includes an information field M, which indicates whether the AIoT device needs to perform D2R transmission (i.e., the AIoT device sends information to the reader). If M indicates "Yes", then the AIoT device needs to send D2R, and the CWN needs to send a carrier wave to the AIoT device for backscattering to transmit D2R (such as the first uplink signal). If M indicates "No", then the AIoT device does not need to send D2R, and the CWN does not need to send a carrier wave.

[0454] Method 3: CWN determines whether the AIoT device needs to send D2R after receiving R2D based on the service type. If the service type is DO-DTT (inventory-type service), the AIoT device needs to send D2R after receiving R2D. In this case, CWN needs to send CW to the AIoT device after listening to R2D. If the service type is DT (command-type service), the AIoT device does not need to send D2R after receiving R2D. In this case, CWN does not need to send CW to the AIoT device after listening to R2D.

[0455] Time interval Tgap indication (as in the second indication information): The specific operation is as follows: If Tgap>0, then CWN will transmit the carrier after receiving R2D for at least Tgap time interval; if Tgap=0, then CWN will transmit the carrier immediately after receiving R2D; if the time interval Tgap indication information field does not appear in R2D, CWN will not transmit the carrier.

[0456] Number of consecutive carrier transmissions N (as indicated in the fourth indication information): This indicates that CWN needs to transmit at least N carriers.

[0457] Time interval Tgap1 indication (as in the fifth indication information): The time interval between two consecutive transmissions of N carriers is Tgap1. Tgap1 is the time from the stop of the previous carrier to the start of the next carrier transmission.

[0458] Transmission frequency indication (sixth indication information): The transmission frequencies of one or more single-frequency sine waves contained in CW are f0, f1, f2, ... etc.

[0459] Option 4: CWN continuously transmits CW, and AIoT devices can use it for backscattering at any time according to their own needs.

[0460] In some embodiments, the CWN continuously transmits CWs, the characteristics of which include at least one of the specific characteristics of the CWs transmitted in Scheme 1. The CWN is obtained through network / base station configuration, or through reader instruction, or through pre-configuration.

[0461] In some embodiments, the network / base station or reader may instruct the CWN to update / change the characteristics of the currently transmitted CW, for example: if the currently transmitted CW is a single-frequency sine wave, instruct the CWN to change to transmitting two single-frequency sine waves next; if the frequency of the single-frequency sine wave in the currently transmitted CW is f1, instruct the CWN to transmit two single-frequency sine waves next with frequencies of f2 and f3 respectively.

[0462] In one example, as shown in Figures 3A and 3B, CWN listens for R2D sent by the reader.

[0463] In some embodiments, in topology 1, the reader is a base station, and in topology 2, the reader is an intermediate node UE.

[0464] In some embodiments, the information / service data sent by the reader to the AIoT device is transmitted via the R2D link, and the physical layer is carried through the PRDCH channel.

[0465] In some embodiments, although R2D is sent by the reader to the AIoT device, due to the characteristics of radio wave transmission, other devices within a certain space / distance can also receive R2D, and CWN can turn on the receiver to listen to the transmission on the R2D link.

[0466] In some embodiments, in Scheme 1 and Scheme 2, the R2D sent by the reader to the AIoT device only contains service information and data, and does not contain any information about CW characteristics, nor does it contain any information instructing how CWN transmits the carrier.

[0467] In one example, the main difference between Scheme 1 and Scheme 2 is whether there is a minimum time interval Tgap between R2D and the transmitted carrier.

[0468] In some embodiments, as shown in Figure 3C, in Scheme 1, after CWN detects R2D, it can immediately send a single-frequency sine wave with a continuous duration of T.

[0469] In some embodiments, as shown in Figure 3D, in Scheme 2, after the CWN detects the R2D, it can send a continuous single-frequency sine wave with a duration of T after an interval of Tgap. Furthermore, the specific waiting time interval for the CWN can be greater than Tgap.

[0470] In one example, the CW timing is backscattered from the timing of the AIoT device.

[0471] In some embodiments, as shown in FIG3E, there is a time interval Tgap between CWN transmission of CW and preceding R2D, and Tgap≥0; there is also a time interval Tgap2 between device transmission of D2R and preceding associated R2D, and Tgap2≥0.

[0472] In some embodiments, Tgap≤Tgap2.

[0473] In some embodiments, the reason is that the device's own clock and oscillator are not very accurate. In order to ensure that the device has a CW when sending D2R, CWN needs to send a CW to the device in advance, so as to make up for the deviation caused by the inaccuracy of the device clock, such as shifting it forward or backward.

[0474] In one example, in Scheme 3, when the reader sends R2D to the AIoT device, the reader assumes that the CWN can also receive the R2D. Therefore, the R2D will contain some indication information that instructs the CWN on how to transmit the carrier. Moreover, the reader assumes that after the CWN receives the indication signal in the R2D, it will determine the specific characteristics of the transmitted carrier according to the specific content of the indication information, such as the start time of the transmitted carrier, the duration of continuous transmission of the carrier, whether to transmit a single frequency sine wave or multiple single frequency sine waves, and the frequency of each sine wave.

[0475] This disclosure also proposes an apparatus for implementing any of the above methods. For example, a terminal is proposed, which includes units or modules for implementing the steps performed by the terminal in any of the above methods. Furthermore, another network device is proposed, including units or modules for implementing the steps performed by the network device (e.g., access network device, core network functional node, core network device, etc.) in any of the above methods.

[0476] It should be understood that the division of units or modules in the above device is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, the units or modules in the device can be implemented by a processor calling software: for example, the device includes a processor connected to a memory containing instructions. The processor calls the instructions stored in the memory to implement any of the above methods or to implement the functions of the units or modules in the above device. The processor can be, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory can be internal or external to the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits. The functionality of some or all of the units or modules can be achieved through the design of these hardware circuits, which can be understood as one or more processors. For example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC). The functionality of some or all of the units or modules is achieved through the design of the logical relationships between the components within the circuit. In another implementation, the hardware circuit can be implemented using a programmable logic device (PLD). Taking a field-programmable gate array (FPGA) as an example, it can include a large number of logic gates. The connection relationships between the logic gates are configured through a configuration file, thereby achieving the functionality of some or all of the units or modules. All units or modules of the above device can be implemented entirely through processor-called software, entirely through hardware circuits, or partially through processor-called software with the remaining parts implemented through hardware circuits.

[0477] In this embodiment, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction read and execute capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationships of hardware circuits. The logical relationships of the aforementioned hardware circuits are fixed or reconfigurable. For example, the processor is a hardware circuit implemented using an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and configuring the hardware circuit can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. Furthermore, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0478] Figure 7A is a schematic diagram of a communication device according to an embodiment of the present disclosure. As shown in Figure 7A, the communication device 7100 may include a transceiver module 7101 and a processing module 7102.

[0479] In some embodiments, the transceiver module 7101 is configured to listen for a first downlink signal sent by the second node to the first device. The first downlink signal is used to determine whether to transmit a first carrier, which is used by the first device for backscattering. In some embodiments, the transceiver module 7101 is further configured to perform at least one of the communication steps, such as transmitting and / or receiving, performed by the first node in any of the above methods, which will not be described in detail here. In some embodiments, the processing module 7102 is further configured to perform at least one of the steps, other than the communication steps such as transmitting and / or receiving, performed by the first node in any of the above methods, which will not be described in detail here.

[0480] In some embodiments, the transceiver module 7101 may also be configured to transmit first information, which is used by the first node to determine the configuration of the first carrier. The first carrier is determined by the first node based on a first downlink signal detected by the first device, and the first carrier is used by the first device for backscattering. In some embodiments, the transceiver module 7101 is also configured to perform at least one of the communication steps, such as transmission and / or reception, performed by the third node in any of the above methods, which will not be described in detail here. In some embodiments, the processing module 7102 is also configured to perform at least one of the steps, other than the communication steps such as transmission and / or reception, performed by the third node in any of the above methods, which will not be described in detail here.

[0481] In some embodiments, the transceiver module described above may include a transmitting module and / or a receiving module. The transmitting module and the receiving module may be separate or integrated together. Optionally, the transceiver module described above may be interchangeable with a transceiver.

[0482] Figure 7B is a schematic diagram of another structure of a communication device provided according to an embodiment of the present disclosure. As shown in Figure 7B, the communication device 7200 can be either a first node or a third node, or it can be a chip, chip system, or processor that supports the first node in implementing any of the above methods, or it can be a chip, chip system, or processor that supports the third node in implementing any of the above methods. The communication device 7200 can be used to implement the methods described in the above method embodiments, and for details, please refer to the description in the above method embodiments.

[0483] As shown in Figure 7B, the communication device 7200 includes one or more processors 7201. The processor 7201 can be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit (CPU). The baseband processor can be used to process communication protocols and communication data, while the CPU can be used to control communication devices (e.g., base stations, baseband chips, terminal devices, terminal device chips, DUs or CUs, etc.), execute programs, and process program data. Optionally, the communication device 7200 can be used to execute any of the above methods. Optionally, one or more processors 7201 can be used to invoke instructions to cause the communication device 7200 to execute any of the above methods.

[0484] In some embodiments, the communication device 7200 further includes one or more transceivers 7202. When the communication device 7200 includes one or more transceivers 7202, the transceiver 7202 performs at least one of the communication steps such as sending and / or receiving in the above method, and the processor 7201 performs at least one of the other steps. In optional embodiments, the transceiver 7202 may include a receiver and / or a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, interface, etc., can be used interchangeably; the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc., can be used interchangeably; and the terms receiver, receiving unit, receiver, receiving circuit, etc., can be used interchangeably.

[0485] In some embodiments, the communication device 7200 further includes one or more memories 7203 for storing data. Optionally, all or part of the memories 7203 may be located outside the communication device 7200. In optional embodiments, the communication device 7200 may include one or more interface circuits 7204. Optionally, the interface circuits 7204 are connected to the memories 7203 and can be used to receive data from the memories 7203 or other devices, and to send data to the memories 7203 or other devices. For example, the interface circuits 7204 can read data stored in the memories 7203 and send that data to the processor 7201.

[0486] The communication device 7200 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 7200 described in this disclosure is not limited thereto, and the structure of the communication device 7200 may not be limited by FIG. 7A. The communication device may be a standalone device or a part of a larger device. For example, the communication device may be: (1) a standalone integrated circuit IC, or chip, or chip system or subsystem; (2) a collection of one or more ICs, optionally, the IC collection may also include storage components for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, terminal device, smart terminal device, cellular phone, wireless device, handheld device, mobile unit, vehicle device, network device, cloud device, artificial intelligence device, etc.; (6) others, etc.

[0487] Figure 8 is a schematic diagram of a chip provided according to an embodiment of the present disclosure. For cases where the communication device 7200 can be a chip or a chip system, please refer to the schematic diagram of the chip 800 shown in Figure 8, but it is not limited thereto.

[0488] Chip 800 includes one or more processors 801. Chip 800 is used to perform any of the above methods.

[0489] In some embodiments, chip 800 further includes one or more interface circuits 802. Optionally, terms such as interface circuit, interface, and transceiver pin can be used interchangeably. In some embodiments, chip 800 further includes one or more memories 803 for storing data. Optionally, all or part of the memories 803 may be located outside chip 800. Optionally, interface circuit 802 is connected to memory 803, and interface circuit 802 can be used to receive data from memory 803 or other devices, and interface circuit 802 can be used to send data to memory 803 or other devices. For example, interface circuit 802 can read data stored in memory 803 and send the data to processor 801.

[0490] In some embodiments, the interface circuit 802 performs at least one of the communication steps, such as sending and / or receiving, in the above-described method. For example, the interface circuit 802 performing the communication steps, such as sending and / or receiving, in the above-described method means that the interface circuit 802 performs data interaction between the processor 801, the chip 800, the memory 803, or the transceiver device. In some embodiments, the processor 801 performs at least one of the other steps.

[0491] The modules and / or devices described in the various embodiments, such as virtual devices, physical devices, and chips, can be combined or separated arbitrarily as needed. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0492] This disclosure also proposes a storage medium storing instructions that, when executed on a communication device 7200, cause the communication device 7200 to perform any of the methods described above. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but not limited thereto; it may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but not limited thereto; it may also be a temporary storage medium.

[0493] This disclosure also proposes a program product that, when executed by a communication device 7200, causes the communication device 7200 to perform any of the above methods. Optionally, the program product is a computer program product.

[0494] This disclosure also proposes a computer program that, when run on a computer, causes the computer to perform any of the above methods.

[0495] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0496] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A communication method, performed by a first node, the method comprising: listening to a first downlink signal, the first downlink signal being used to determine whether to transmit a first carrier, the first carrier being used for backscattering by a first device.

2. The method of claim 1, wherein, The first downlink signal is a downlink signal transmitted by a second node, the second node being associated with the first node; or, the first downlink signal is a downlink signal with a signal strength greater than or equal to a preset value.

3. The method of claim 1, wherein, An interval first duration between an ending moment of a receiving duration of the first downlink signal and a starting moment of a transmitting duration of the first carrier.

4. The method of claim 3, wherein, The first duration is greater than or equal to 0.

5. The method of claim 3 or 4, wherein, The first duration is greater than or equal to a first preset value, the first preset value being a minimum time interval between a downlink receiving duration of the first device and an uplink transmitting duration of the first device, the downlink receiving duration being used for the first device to receive a downlink signal, the uplink transmitting duration being used for the first device to transmit an uplink signal.

6. The method according to any one of claims 1 to 5, wherein, The configuration of the first carrier comprises at least one of the following: a second duration, the second duration being the transmitting duration of the first carrier; a third duration, the third duration being an interval length between the transmitting durations of two adjacent first carriers; a fourth duration, the fourth duration being an interval length between the starting moment or the ending moment of the receiving duration of the first downlink signal and the starting moment of the transmitting duration of the first carrier; a carrier type of the first carrier; a number of transmissions of the first carrier; a transmission frequency of the first carrier.

7. The method of claim 6, wherein, The carrier type of the first carrier comprises at least one of the following: a single-frequency sine wave; a plurality of single-frequency sine waves.

8. The method of claim 7, wherein, The first carrier is a plurality of single-frequency sine waves, and the intervals between the transmission frequencies of adjacent sine waves are the same.

9. The method of claim 7 or 8, wherein, The transmission frequencies of the plurality of single-frequency sine waves are different.

10. The method of any one of claims 6-9, wherein, The number of transmissions of the first carrier is N, N being an integer greater than or equal to 1; or, the intervals in the time domain between N times of transmission of the first carrier are the same, and the value of N is greater than 1.

11. The method of any one of claims 1 to 10, wherein, The transmitting duration of the first carrier is the duration of one transmission of the first carrier; or, the transmitting duration of the first carrier is the total duration of N times of transmission of the first carrier, N being an integer greater than 1.

12. The method of any one of claims 1 to 11, wherein, The configuration of the first carrier is determined by the first node.

13. The method of any one of claims 1 to 12, wherein, The configuration of the first carrier is determined according to first information, wherein the first information is carried in configuration information transmitted by a network device; or, the first information is carried in the first downlink signal transmitted by a reader-writer.

14. The method of claim 13, wherein, The first information comprises at least one of the following: first indication information, the first indication information being used to indicate whether to transmit the first carrier; second indication information, the second indication information being used to indicate a fourth duration, the fourth duration being an interval length between the starting moment or the ending moment of the receiving duration of the first downlink signal and the starting moment of the transmitting duration of the first carrier; third indication information, the third indication information being used to indicate the carrier type of the first carrier; fourth indication information, the fourth indication information being used to indicate the number of transmissions of the first carrier; fifth indication information, used for indicating a third time length, the third time length being a length of an interval between time lengths of adjacent transmissions of the first carrier; sixth indication information, used for indicating a transmission frequency of the first carrier; seventh indication information, used for indicating a second time length, the second time length being a time length of the transmission of the first carrier.

15. The method of claim 14, wherein, The first indication information is located in a first information field in the first downlink signal, and the first information field is used for indicating whether the first carrier is transmitted, wherein the first indication information with a first value is used for indicating that the first node transmits the first carrier, or the first indication information with a second value is used for indicating that the first node does not transmit the first carrier.

16. The method of claim 15, wherein, The first indication information is located in a second information field in the first downlink signal, and the second information field is used for indicating whether the first downlink signal has an associated uplink signal. The method further comprises: determining to transmit the first carrier, wherein the first indication information indicates that the first uplink signal has an associated downlink signal; determining not to transmit the first carrier, wherein the first indication information indicates that the first uplink signal does not have an associated downlink signal.

17. The method of any one of claims 1 to 16, wherein, The method further comprises: determining, according to downlink instructions included in the first downlink signal, whether the first downlink signal has an associated downlink signal, the first downlink signal being a first downlink signal listened to by the first node; determining to transmit the first carrier, wherein the first uplink signal has an associated downlink signal; determining not to transmit the first carrier, wherein the first uplink signal does not have an associated downlink signal.

18. A communication method, performed by a third node, the method comprising: transmitting first information, the first information being used for a first node to determine a configuration of a first carrier, the first carrier being determined by the first node to be transmitted according to a first downlink signal listened to by the first node, and the first carrier being used for backscattering by the first device.

19. The method of claim 18, wherein, The first downlink signal is a downlink signal transmitted by a second node, the second node being associated with the first node; or the first downlink signal is a downlink signal with a signal strength greater than or equal to a preset value.

20. The method of claim 18 or 19, wherein, An end moment of a time length of receiving the first downlink signal and a start moment of a time length of transmitting the first carrier are separated by a first time length.

21. The method of claim 20, wherein, The first time length is greater than or equal to 0.

22. The method of any one of claims 20-21, wherein, The first time length is greater than or equal to a first preset value, the first preset value being a minimum time interval between a downlink receiving time length of the first device and an uplink transmitting time length of the first device, the downlink receiving time length being used for the first device to receive a downlink signal, and the uplink transmitting time length being used for the first device to transmit an uplink signal.

23. The method of any one of claims 19 to 22, wherein, The configuration of the first carrier comprises at least one of the following: a second time length, the second time length being a time length of the transmission of the first carrier; a third time length, the third time length being a length of an interval between time lengths of adjacent transmissions of the first carrier; a fourth time length, the fourth time length being an interval length between a start time or an end time of a receiving time length of the first downlink signal and a start time of a transmitting time length of the first carrier; a carrier type of the first carrier; a transmitting number of the first carrier; a transmitting frequency of the first carrier.

24. The method of claim 23, wherein, The carrier type of the first carrier comprises at least one of: a single-frequency sine wave; a plurality of single-frequency sine waves.

25. The method of claim 24, wherein, The first carrier is a plurality of single-frequency sine waves, and intervals between transmitting frequencies of adjacent sine waves are the same.

26. The method of claim 24 or 25, wherein, The transmitting frequencies of the plurality of single-frequency sine waves are different.

27. The method of any one of claims 23-26, wherein, The transmitting number of the first carrier is N, N being an integer greater than or equal to 1; or, intervals in a time domain between N times of transmitting the first carrier are the same, and a value of N is greater than 1.

28. The method of any one of claims 18-27, wherein, The transmitting time length of the first carrier is a time length during which the first carrier is transmitted once; or, the transmitting time length of the first carrier is a total time length during which the first carrier is transmitted N times, N being an integer greater than or equal to 1.

29. The method of any one of claims 18 to 28, wherein, The third node is a network device, and the first information is carried in configuration information transmitted by the network device; or, the third node is a reader-writer, and the first information is carried in the first downlink signal transmitted by the reader-writer.

30. The method of any one of claims 18-29, wherein, The first information comprises at least one of: first indication information, the first indication information being used to indicate whether the first carrier is transmitted; second indication information, the second indication information being used to indicate a fourth time length, the fourth time length being an interval length between a start time or an end time of a receiving time length of the first downlink signal and a start time of a transmitting time length of the first carrier; third indication information, the third indication information being used to indicate a carrier type of the first carrier; fourth indication information, the fourth indication information being used to indicate a transmitting number of the first carrier; fifth indication information, the fifth indication information being used to indicate a second time length, the second time length being an interval length between transmitting time lengths of adjacent two times of transmitting the first carrier; sixth indication information, the sixth indication information being used to indicate a transmitting frequency of the first carrier; seventh indication information, the seventh indication information being used to indicate a second time length, the second time length being a transmitting time length of the first carrier.

31. The method of claim 30, wherein, The first indication information is located in a first information field in the first downlink signal, and the first information field is used to indicate whether the first carrier is transmitted, wherein first indication information with a first value is used to indicate that the first carrier is transmitted; or, first indication information with a second value is used to indicate that the first carrier is not transmitted.

32. The method of claim 31, wherein, The first indication information is located in a second information field in the first downlink signal, and the second information field is used to indicate whether the first downlink signal has an associated uplink signal; first indication information indicating that the first uplink signal has an associated downlink signal is used to indicate that the first node transmits the first carrier, and first indication information indicating that the first uplink signal does not have an associated downlink signal is used to indicate that the first node does not transmit the first carrier.

33. A method of communication performed by a communication system, the communication system comprising: The first node and the third node; the method comprises: The third node sends first information to the first node, the first information being used by the first node to determine configuration of a first carrier, the first carrier being used by the first device for backscattering; The first node monitors the first downlink signal, the first downlink signal being used by the first node to determine whether to send the first carrier. 34.A communication device, comprising: a transceiver configured to monitor a first downlink signal, the first downlink signal being used to determine whether to send a first carrier, the first carrier being used by the first device for backscattering. 35.A communication device, comprising: a transceiver configured to send first information, the first information being used by the first node to determine configuration of a first carrier, the first carrier being sent by the first node according to a first downlink signal monitored by the first node, the first carrier being used by the first device for backscattering. 36.A communication device, comprising: one or more processors; wherein the communication device is configured to perform the communication method of any one of claims 1 to 32. 37.A communication system, comprising a first node and a third node; the first node is configured to perform the communication method of any one of claims 1 to 17; and the third node is configured to perform the communication method of any one of claims 18 to 32. 38.A computer storage medium storing instructions, which when executed on a communication device, cause the communication device to perform the communication method of any one of claims 1 to 32. 39.A computer program product comprising a computer program, which when executed by a processor, performs the communication method of any one of claims 1 to 32.

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