Communication method, terminal, device, apparatus, system, medium, and program

Abstract

The present invention relates to a communication method, a terminal, a device, an apparatus, a system, a medium, and a program. The method comprises: receiving a CW sent by a CWN; on the basis of a carrier frequency of the CW, determining a reflected signal based on backscattering modulation, wherein the carrier frequency is located in a downlink frequency spectrum, and the frequency of the reflected signal is located in an uplink frequency spectrum corresponding to the downlink frequency spectrum, or, the carrier frequency is located in an uplink frequency spectrum, and the frequency of the reflected signal is located in a downlink frequency spectrum corresponding to the uplink frequency spectrum; and sending the reflected signal to a node device, wherein a terminal is an Ambient-Internet of Things (IoT) terminal for acquiring energy from an ambient. In the method of the present invention, upon receiving a CW, an Ambient-IoT terminal can determine a corresponding reflected signal, such that a carrier frequency of the CW and the frequency of the reflected signal are respectively located in an uplink frequency spectrum and a downlink frequency spectrum, thereby achieving good isolation of a downlink CW signal and an uplink transmit signal in a frequency domain, and improving the receiving performance of a system and reducing the complexity of a base station or an intermediate node.

Description

Communication method, terminal, equipment, device, system, medium and program Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular to a communication method, terminal, equipment, device, system, medium, and program. Background Art

[0002] The Ambient Internet of Things (Ambient-IoT) is a type of IoT. Compared to cellular-based Narrowband Internet of Things (NB-IoT) terminals, Ambient-IoT terminals are less complex, less expensive, and require less maintenance. Ambient-IoT terminals require energy from the external environment and are therefore also referred to as ambient-powered terminals or passive terminals.

[0003] Summary of the Invention

[0004] To improve the isolation between uplink and downlink communications in the Ambient-IoT system, related technical approaches may increase the complexity of network devices or intermediate nodes.

[0005] Embodiments of the present disclosure provide a communication method, terminal, device, apparatus, system, medium, and program.

[0006] In a first aspect, an embodiment of the present disclosure provides a communication method, performed by a terminal, the method comprising:

[0007] Receive continuous electromagnetic waves (CW) sent by continuous electromagnetic wave nodes (CWN or CW node);

[0008] Determining a reflected signal based on backscattering modulation according to a carrier frequency of the CW, wherein the carrier frequency is in a downlink spectrum and the frequency of the reflected signal is in an uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is in an uplink spectrum and the frequency of the reflected signal is in a downlink spectrum corresponding to the uplink spectrum;

[0009] Sending the reflected signal to the node device;

[0010] The terminal is an Ambient-IoT terminal that obtains energy from the environment.

[0011] In a second aspect, an embodiment of the present disclosure provides a communication method, performed by a CWN, the method comprising:

[0012] A CW is sent to a terminal, where the CW is used by the terminal to determine a reflected signal based on backscatter modulation according to a carrier frequency of the CW, wherein the carrier frequency is in a downlink spectrum and the frequency of the reflected signal is in an uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is in an uplink spectrum and the frequency of the reflected signal is in a downlink spectrum corresponding to the uplink spectrum; the terminal is an Ambient-IoT terminal.

[0013] In a third aspect, an embodiment of the present disclosure provides a communication method, performed by a node device, the method comprising:

[0014] A reflected signal sent by a receiving terminal, wherein the reflected signal is determined by the terminal according to the carrier frequency of the CW sent by the CWN, the carrier frequency is in a downlink spectrum, and the frequency of the reflected signal is in an uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is in an uplink spectrum, and the frequency of the reflected signal is in a downlink spectrum corresponding to the uplink spectrum; the terminal is an Ambient-IoT terminal that obtains energy from the environment.

[0015] In a fourth aspect, an embodiment of the present disclosure provides a terminal, including:

[0016] Transceiver module, used to receive CW sent by CWN;

[0017] a processing module, configured to determine a reflected signal based on backscatter modulation according to a carrier frequency of the CW, wherein the carrier frequency is in a downlink spectrum and the frequency of the reflected signal is in an uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is in an uplink spectrum and the frequency of the reflected signal is in a downlink spectrum corresponding to the uplink spectrum;

[0018] The transceiver module is further configured to send the reflected signal to the node device;

[0019] Wherein, the terminal is an Ambient-IoT terminal.

[0020] In a fifth aspect, an embodiment of the present disclosure provides a CWN device, including:

[0021] A transceiver module is configured to send a CW to a terminal, where the CW is used by the terminal to determine a reflected signal based on backscatter modulation according to the carrier frequency of the CW, wherein the carrier frequency is located in a downlink spectrum and the frequency of the reflected signal is located in an uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is located in an uplink spectrum and the frequency of the reflected signal is located in a downlink spectrum corresponding to the uplink spectrum; and the terminal is an Ambient-IoT terminal.

[0022] In a sixth aspect, an embodiment of the present disclosure provides a node device, including:

[0023] A transceiver module is configured to receive a reflected signal sent by a terminal, wherein the reflected signal is determined by the terminal based on the carrier frequency of the CW sent by the CWN, the carrier frequency is in a downlink spectrum, and the frequency of the reflected signal is in an uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is in an uplink spectrum, and the frequency of the reflected signal is in a downlink spectrum corresponding to the uplink spectrum; the terminal is an Ambient-IoT terminal that obtains energy from the environment.

[0024] In a seventh aspect, an embodiment of the present disclosure provides a communication device, including:

[0025] one or more processors;

[0026] The communication device is used to execute the method described in the first aspect, the second aspect or the third aspect.

[0027] In an eighth aspect, an embodiment of the present disclosure provides a communication system, including a terminal, a CWN device, and a node device, wherein:

[0028] The terminal is configured to implement the method according to the first aspect;

[0029] The CWN device is configured to implement the method according to the second aspect;

[0030] The node device is configured to implement the method described in the third aspect.

[0031] In a ninth aspect, an embodiment of the present disclosure provides a storage medium, wherein the storage medium stores instructions, wherein:

[0032] When the instruction is executed on a communication device, the communication device is caused to execute the method as described in the first aspect, the second aspect or the third aspect.

[0033] In a tenth aspect, an embodiment of the present disclosure provides a program product, wherein:

[0034] When the program product is executed by a communication device, the communication device is caused to execute the method according to the first aspect, the second aspect, or the third aspect.

[0035] In the embodiment of the present disclosure, after receiving the CW, the Ambient-IoT terminal can determine the corresponding reflected signal so that the carrier frequency of the CW and the frequency of the reflected signal are located in the uplink spectrum and the downlink spectrum respectively, so that the downlink CW signal and the uplink transmission signal have good isolation in the frequency domain, thereby improving the system's receiving performance and reducing the complexity of the base station or intermediate node. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0037] FIG1 is an exemplary schematic diagram of the architecture of a communication system provided according to an embodiment of the present disclosure;

[0038] FIG2a is an exemplary interaction diagram of a method provided according to an embodiment of the present disclosure;

[0039] FIG2 b is a schematic diagram of a system according to an embodiment of the present disclosure;

[0040] FIG2c is a schematic diagram of frequency intervals provided according to an embodiment of the present disclosure;

[0041] 3a to 3b are exemplary flowcharts of a method according to an embodiment of the present disclosure;

[0042] 4a and 4b are exemplary flowcharts of a method according to an embodiment of the present disclosure;

[0043] 5a to 5b are exemplary flowcharts of a method according to an embodiment of the present disclosure;

[0044] FIG6a is a schematic structural diagram of a terminal according to an embodiment of the present disclosure;

[0045] FIG6 b is a schematic structural diagram of a CWN device according to an embodiment of the present disclosure;

[0046] FIG6c is a schematic structural diagram of a node device according to an embodiment of the present disclosure;

[0047] FIG7a is a schematic diagram of a communication device according to an embodiment of the present disclosure;

[0048] FIG7 b is a schematic diagram of a communication device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0049] Embodiments of the present disclosure provide a communication method, terminal, device, apparatus, system, medium, and program.

[0050] In a first aspect, an embodiment of the present disclosure provides a communication method, executed by a terminal, the method comprising:

[0051] Receive CW sent by CWN;

[0052] Determine a reflected signal based on backscatter modulation based on the CW carrier frequency, wherein the carrier frequency is in the downlink spectrum and the frequency of the reflected signal is in the uplink spectrum corresponding to the downlink spectrum; or, alternatively, the carrier frequency is in the uplink spectrum and the frequency of the reflected signal is in the downlink spectrum corresponding to the uplink spectrum;

[0053] Sending reflected signals to node devices;

[0054] Among them, the terminal is an Ambient-IoT terminal that obtains energy from the environment.

[0055] In the above embodiment, after receiving the CW, the Ambient-IoT terminal can determine the corresponding reflected signal so that the carrier frequency of the CW and the frequency of the reflected signal are located in the uplink spectrum and the downlink spectrum respectively, so that the downlink CW signal and the uplink transmission signal have good isolation in the frequency domain, thereby improving the system's receiving performance and reducing the complexity of the base station or intermediate node.

[0056] In conjunction with the embodiments of the first aspect, in some embodiments, determining the reflected signal based on backscatter modulation according to the carrier frequency of the CW includes:

[0057] Perform frequency division on the CW carrier frequency to obtain the subcarrier frequency;

[0058] Modulating a baseband signal on a subcarrier frequency to obtain an intermediate frequency signal, wherein the baseband signal is used to indicate information to be transmitted;

[0059] Based on backscatter modulation, the intermediate frequency signal is modulated on the CW carrier frequency to obtain the reflected signal.

[0060] In the above embodiment, when the terminal determines the reflected signal based on the CW, it can perform two spectrum shifts on the CW, so that the carrier frequency of the CW and the frequency of the reflected signal are located in the uplink spectrum and downlink spectrum respectively, thereby improving the uplink and downlink isolation.

[0061] In combination with the embodiments of the first aspect, in some embodiments, the subcarrier frequency is a frequency interval between a center of an uplink spectrum and a center of a downlink spectrum corresponding to the uplink spectrum.

[0062] In the above embodiment, the terminal can determine the subcarrier frequency according to the frequency interval between a corresponding set of uplink spectrum and downlink spectrum, so as to reasonably divide the CW carrier frequency and facilitate spectrum shifting operation.

[0063] In conjunction with the embodiments of the first aspect, in some embodiments, the frequency interval satisfies at least one of the following:

[0064] The frequency interval is a value set according to the terminal's operating frequency band;

[0065] The frequency interval is indicated by the network equipment;

[0066] The frequency interval is determined according to the offset value indicated by the network device, wherein the frequency interval is between a first interval and a second interval, the first interval being the interval between the lower sideband of the uplink spectrum carrier and the upper sideband of the downlink spectrum carrier corresponding to the uplink spectrum, and the second interval being the interval between the upper sideband of the uplink spectrum carrier and the lower sideband of the downlink spectrum carrier corresponding to the uplink spectrum.

[0067] In the above embodiments, the terminal may determine the frequency interval based on different methods, thereby improving the flexibility of the terminal frequency division and spectrum shifting, which is beneficial to improving isolation in different communication frequency bands or communication scenarios.

[0068] In conjunction with the embodiments of the first aspect, in some embodiments, the reflected signal is a down-converted signal of a carrier frequency, wherein the carrier frequency is located in a downlink spectrum; and / or,

[0069] The reflected signal is an up-converted signal of the carrier frequency, wherein the carrier frequency is located in the uplink spectrum.

[0070] In the above embodiment, the reflected signal determined by the terminal can be obtained by up-conversion and / or down-conversion based on the carrier frequency of the CW. When sending the reflected signal, the terminal can send one of them, or the node device can receive one of them, so as to ensure that the reflected signal and the CW are in different frequency spectra, thereby improving isolation performance.

[0071] In conjunction with the embodiments of the first aspect, in some embodiments, the method further includes:

[0072] The indication information sent by the receiving node device is used to instruct the terminal to perform backscattering and / or to indicate a carrier frequency of a CW.

[0073] In the above embodiment, the terminal can obtain the timing of backscattering and / or the carrier frequency of the CW through the received indication information, so as to perform reasonable frequency division.

[0074] In combination with the embodiments of the first aspect, in some embodiments, the node device is a network device or a relay device.

[0075] In the above embodiment, the terminal may send the reflected signal after spectrum shifting to the network device or relay device to implement backscatter-based communication and improve the isolation and receiving performance of the system.

[0076] In a second aspect, an embodiment of the present disclosure provides a communication method, performed by a CWN, comprising:

[0077] A CW is sent to the terminal. The CW is used by the terminal to determine a reflected signal based on backscatter modulation according to the carrier frequency of the CW, wherein the carrier frequency is in the downlink spectrum and the frequency of the reflected signal is in the uplink spectrum corresponding to the downlink spectrum; or the carrier frequency is in the uplink spectrum and the frequency of the reflected signal is in the downlink spectrum corresponding to the uplink spectrum; the terminal is an Ambient-IoT terminal.

[0078] In the above embodiment, the CWN can send a CW to the terminal to provide the Ambient-IoT terminal with the energy or signal of a modulated signal, so that the terminal can determine the corresponding reflected signal, so that the carrier frequency of the CW and the frequency of the reflected signal are located in the uplink spectrum and the downlink spectrum respectively, so that the downlink CW signal and the uplink transmission signal have good isolation in the frequency domain, thereby improving the system's receiving performance and reducing the complexity of the base station or intermediate node.

[0079] In combination with the embodiments of the second aspect, in some embodiments, the CW carrier frequency is used by the terminal to obtain a sub-carrier frequency, and the sub-carrier frequency is used by the terminal to obtain an intermediate frequency signal and a reflected signal.

[0080] In combination with the embodiments of the second aspect, in some embodiments, the subcarrier frequency is a frequency interval between a center of an uplink spectrum and a center of a downlink spectrum corresponding to the uplink spectrum.

[0081] In conjunction with the embodiments of the second aspect, in some embodiments, the frequency interval satisfies at least one of the following:

[0082] The frequency interval is a value set according to the terminal's operating frequency band;

[0083] The frequency interval is indicated by the network equipment;

[0084] The frequency interval is determined according to the offset value indicated by the network device, wherein the frequency interval is between a first interval and a second interval, the first interval being the interval between the lower sideband of the carrier located in the uplink spectrum and the upper sideband of the downlink spectrum carrier corresponding to the uplink spectrum, and the second interval being the interval between the upper sideband of the uplink spectrum carrier and the lower sideband of the downlink spectrum carrier corresponding to the uplink spectrum.

[0085] In conjunction with the embodiments of the second aspect, in some embodiments, the reflected signal is a down-converted signal of a carrier frequency, wherein the carrier frequency is located in a downlink spectrum; or,

[0086] The reflected signal is an up-converted signal of the carrier frequency, wherein the carrier frequency is located in the uplink spectrum.

[0087] In a third aspect, an embodiment of the present disclosure provides a communication method, performed by a node device, the method comprising:

[0088] A reflected signal sent by a receiving terminal is determined by the terminal based on the carrier frequency of the CW sent by the CWN, the carrier frequency is in the downlink spectrum, and the frequency of the reflected signal is in the uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is in the uplink spectrum, and the frequency of the reflected signal is in the downlink spectrum corresponding to the uplink spectrum; the terminal is an Ambient-IoT terminal that obtains energy from the environment.

[0089] In the above embodiment, the node device can receive the reflected signal sent by the terminal to obtain the information sent by the terminal based on backscattering, wherein the CW carrier frequency and the frequency of the reflected signal are located in the uplink spectrum and the downlink spectrum respectively, so that the downlink CW signal and the uplink transmission signal have good isolation in the frequency domain, thereby improving the system's receiving performance and reducing the complexity of the base station or intermediate node.

[0090] In combination with the embodiments of the third aspect, in some embodiments, the CW carrier frequency is used by the terminal to obtain a sub-carrier frequency, and the sub-carrier frequency is used by the terminal to obtain an intermediate frequency signal and a reflected signal.

[0091] In combination with the embodiments of the third aspect, in some embodiments, the subcarrier frequency is a frequency interval between a center of an uplink spectrum and a center of a downlink spectrum corresponding to the uplink spectrum.

[0092] In conjunction with the embodiments of the third aspect, in some embodiments, the frequency interval satisfies at least one of the following:

[0093] The frequency interval is a value set according to the terminal's operating frequency band;

[0094] The frequency interval is indicated by the network equipment;

[0095] The frequency interval is determined according to the offset value indicated by the network device, wherein the frequency interval is between a first interval and a second interval, the first interval being the interval between the lower sideband of the uplink spectrum carrier and the upper sideband of the downlink spectrum carrier corresponding to the uplink spectrum, and the second interval being the interval between the upper sideband of the uplink spectrum carrier and the lower sideband of the downlink spectrum carrier corresponding to the uplink spectrum.

[0096] In conjunction with the embodiments of the third aspect, in some embodiments, the reflected signal is a down-converted signal of a carrier frequency, wherein the carrier frequency is located in a downlink spectrum; or,

[0097] The reflected signal is an up-converted signal of the carrier frequency, wherein the carrier frequency is located in the uplink spectrum.

[0098] In conjunction with the embodiments of the third aspect, in some embodiments, the method further includes:

[0099] Sending instruction information to the terminal, where the instruction information is used to instruct the terminal to perform backscattering and / or to indicate a carrier frequency of a CW.

[0100] In a fourth aspect, an embodiment of the present disclosure provides a terminal, including:

[0101] Transceiver module, used to receive CW sent by CWN;

[0102] a processing module, configured to determine a reflected signal based on backscatter modulation according to a carrier frequency of the CW, wherein the carrier frequency is in a downlink spectrum and the frequency of the reflected signal is in an uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is in an uplink spectrum and the frequency of the reflected signal is in a downlink spectrum corresponding to the uplink spectrum;

[0103] The transceiver module is also used to send the reflected signal to the node device;

[0104] Among them, the terminal is an Ambient-IoT terminal.

[0105] In a fifth aspect, an embodiment of the present disclosure provides a CWN device, including:

[0106] A transceiver module is used to send a CW to a terminal. The CW is used by the terminal to determine a reflected signal based on backscatter modulation according to the carrier frequency of the CW, wherein the carrier frequency is in the downlink spectrum and the frequency of the reflected signal is in the uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is in the uplink spectrum and the frequency of the reflected signal is in the downlink spectrum corresponding to the uplink spectrum. The terminal is an Ambient-IoT terminal.

[0107] In a sixth aspect, an embodiment of the present disclosure provides a node device, including:

[0108] The transceiver module is used to receive the reflected signal sent by the terminal, where the reflected signal is determined by the terminal based on the carrier frequency of the CW sent by the CWN, the carrier frequency is in the downlink spectrum, and the frequency of the reflected signal is in the uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is in the uplink spectrum, and the frequency of the reflected signal is in the downlink spectrum corresponding to the uplink spectrum; the terminal is an Ambient-IoT terminal that obtains energy from the environment.

[0109] In a seventh aspect, an embodiment of the present disclosure provides a communication device, including:

[0110] one or more processors;

[0111] The communication device is used to execute the method of the first aspect, the second aspect or the third aspect.

[0112] In an eighth aspect, an embodiment of the present disclosure provides a communication system, including a terminal, a CWN device, and a node device, wherein:

[0113] The terminal is configured to implement the method of the first aspect;

[0114] The CWN device is configured to implement the method of the second aspect;

[0115] The node device is configured to implement the method of the third aspect.

[0116] In a ninth aspect, an embodiment of the present disclosure provides a storage medium, wherein the storage medium stores instructions, wherein:

[0117] When the instructions are executed on the communication device, the communication device is caused to execute the method of the first aspect, the second aspect, or the third aspect.

[0118] In a tenth aspect, an embodiment of the present disclosure provides a program product, wherein:

[0119] When the program product is executed by a communication device, the communication device is caused to execute the method of the first aspect, the second aspect, or the third aspect.

[0120] In an eleventh aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first aspect, the second aspect, or the third aspect.

[0121] In a twelfth aspect, an embodiment of the present disclosure provides a chip or a chip system, wherein the chip or chip system includes a processing circuit configured to execute the method described in the optional implementation of the first aspect, the second aspect, or the third aspect.

[0122] It is understandable that the above-mentioned terminals, node devices, communication systems, storage media, program products, computer programs, chips, or chip systems are all used to perform the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0123] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain 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 certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0124] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0125] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0126] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0127] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0128] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0129] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0130] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0131] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0132] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0133] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0134] In some embodiments, terms such as "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 less than", and "above" can be replaced with each other, and terms such as "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" can be replaced with each other.

[0135] In some embodiments, devices and equipment can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they can also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

[0136] In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

[0137] In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station", "fixed station", and in some embodiments may also be understood as "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission and / or reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)", etc.

[0138] In some embodiments, "terminal" or "terminal device" may be referred to as "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, client, etc.

[0139] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0140] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0141] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0142] FIG1 is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0143] As shown in Figure 1, a communication system 100 may include at least one of the following: a terminal 101, a continuous electromagnetic wave node CWN 102, and a node device 103. Optionally, the number of devices or nodes in Figure 1 is for illustration only, and in actual applications, multiple devices or nodes may be used.

[0144] In some embodiments, terminal 101 may be an Ambient-IoT terminal or device. Terminal 101 may not be equipped with a battery and may be excited and powered by received electromagnetic signals; or it may be equipped with a battery with a small amount of electrical storage capacity and obtain energy from the battery by obtaining external electromagnetic waves, thermal energy, kinetic energy, etc.

[0145] Optionally, the power acquisition and storage capabilities of the terminal 101 vary depending on the type and working mode of the terminal 101. The types of the terminal 101 include:

[0146] Device A: cannot independently generate or amplify signals. For example, Device A uses backscattering or backscattering communication and does not have the ability to amplify downlink (DL) and / or uplink (UL) signals.

[0147] Device B: Has energy storage capabilities but cannot independently generate signals. For example, Device B uses backscattering and can use stored energy to amplify DL and / or UL signals. Device A or Device B may use relatively simple modulation and demodulation methods, such as binary on-off keying (OOK) or phase-shift keying (PSK).

[0148] Device C: Has energy storage capabilities and can independently generate signals, such as a radio frequency (RF) module that actively transmits signals. Device C can use more complex modulation and coding schemes, such as OFDM modulation and demodulation.

[0149] Of the three types of terminals 101 described above, device C has the strongest capabilities and the highest terminal cost. Devices A and B have weaker capabilities and lower terminal costs. Furthermore, since devices A and B can only operate in backscatter mode and cannot actively transmit signals, their supported coverage range is smaller. However, the power consumption of device A or B in this operating mode is lower than that of device C.

[0150] In some embodiments, CWN 103 is used to transmit CWs, which UE 101 can use to transmit uplink information based on backscatter. CWN 103 can also provide an excitation function, enabling devices A and B to perform uplink transmissions based on backscatter. Furthermore, CWs can serve as an energy source (ES), providing energy to UE 101, which can receive and store CWs.

[0151] In some embodiments, the functions of CWN 102 and node device 103 may be implemented by the same device.

[0152] In some embodiments, the node device 103 may be a network device or an intermediate node, such as a relay device.

[0153] In some embodiments, the network device may include at least one of an access network device and a core network device.

[0154] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a wireless fidelity (WiFi) system, but is not limited thereto.

[0155] In some embodiments, the technical solution of the present disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within the access network devices involved in the embodiments of the present disclosure can be transformed into internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0156] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0157] In some embodiments, the core network device can be a device including one or more network elements, or it can be multiple devices or device groups, each including all or part of one or more network elements. The network element can be virtual or physical. The core network includes, for example, at least one of the Evolved Packet Core (EPC), the 5G Core Network (5GCN), and the Next Generation Core (NGC). Alternatively, the core network device refers to a network element with a specific function, such as the Access Management Function (AMF), the Service Management Function (SMF), etc.

[0158] In some embodiments, the relay device can be a terminal, such as at least one of a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and a wireless terminal device in a smart home, but not limited thereto.

[0159] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution provided by the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution provided by the embodiment of the present disclosure is also applicable to similar technical problems.

[0160] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG. 1 , or a part of the main body thereof, but are not limited thereto.

[0161] The entities shown in Figure 1 are examples. The communication system may include all or part of the entities in Figure 1, and may also include other entities outside of Figure 1. The number and form of the entities are arbitrary. The connection relationship between the entities is an example. The entities may be connected or disconnected, and the connection may be in any manner, which may be direct or indirect, and may be wired or wireless.

[0162] The embodiments of the present disclosure 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 (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (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 utilizing other communication processing methods, and next-generation systems based on and extending these. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0163] In the disclosed embodiment, the terminal 101 can communicate based on the backscattering method. Backscattering or backscatter communications is an extremely low-power modulation and transmission technology that uses the principle of backscattering of radio frequency signals, and is a means to achieve the intelligent connection of all things. In backscattering communication, CWN102 sends a radio frequency signal such as CW, the terminal 101 receives the electromagnetic wave, and the internal circuit of the terminal 101 modulates the information to be transmitted on the basis of the incident electromagnetic wave through load impedance modulation and other methods, and then sends out the modulated electromagnetic wave carrying the information. There are many ways to modulate information, such as amplitude shift keying (ASK), frequency-shift keying (FSK) or phase-shift keying (PSK).

[0164] In some RF systems, backscatter devices directly modulate baseband signals onto a CW carrier for signal transmission. While receiving tag signals, network devices or intermediate nodes utilize backscatter to continuously transmit carrier signals. If the isolation between the transmit and receive links is poor, the carrier signal from the transmit link can leak excessively into the receive link, saturating the receive link and impacting reception performance.

[0165] In some possible approaches, technologies such as separating the transmit and receive antennas or increasing the isolation of the transmit and receive signals are needed to improve the isolation problem of the transmit and receive links to prevent excessive leakage of the transmitted carrier signal. This approach increases the complexity of network equipment or intermediate nodes.

[0166] Figure 2a is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in Figure 2a, the embodiment of the present disclosure relates to a communication method, the method comprising:

[0167] In step S2101 , the node device 103 sends instruction information to the terminal 101 .

[0168] Optionally, the indication information is used to instruct the terminal 101 to perform backscattering, and / or to indicate a carrier frequency (Fc) of the CW.

[0169] In one example, the indication information is used to instruct the terminal 101 to perform backscattering. In this example, the indication information can be used as a downlink command or control instruction. After receiving the indication information, the terminal 101 can send a corresponding response to the network or perform a corresponding operation, such as executing steps S2102 to S2105.

[0170] In another example, the indication information is used to indicate the carrier information of the CW, and the carrier information may include the Fc of the CW or the bandwidth of the CW, etc. In this example, the terminal 101 may perform a frequency division operation based on the indication information, such as executing step S2102.

[0171] In another example, the indication information is used to instruct the terminal 101 to perform backscattering and CW Fc, so that the terminal 101 can perform related operations of frequency division and backscattering based on one signaling, which is conducive to saving signaling resources.

[0172] In some embodiments, the node device 103 is a network device or a relay device.

[0173] Optionally, the network device includes a base station. The relay device is an intermediate node, which may be a relay UE.

[0174] In one example, as shown in reference figure 2b, the node device 103 includes at least one of the following: a downlink signal node (DSN), an energy source node (ESN), and an uplink receiver (UR). The DSN is used to send downlink information such as indication information to trigger uplink transmission of the terminal 101. The ESN is used to supply energy to the terminal 101. For example, the ESN supplies energy to device B and device C. Since the energy storage capacity supported by device A is limited, ES other than CW may not be defined for device A; alternatively, ES may also be used for device A. UR105 is used to receive uplink information sent by the Ambient-IoT terminal 101. For example, it receives uplink information sent by the terminal 101 based on the backscatter communication method, or receives uplink information actively transmitted by the terminal 101.

[0175] In this example, the DSN may be a network device such as a base station, or a relay device such as a relay UE, which sends downlink information to the terminal 101. The UR 105 may be another terminal or UE other than the terminal 101, or a network device.

[0176] In this example, the network device can be equivalent to the DSN; alternatively, the network device can simultaneously implement the functions of the DSN and ESN. That is, the network device includes the DSN and ESN and can both send downlink information to terminal 101 and provide power to terminal 101. Alternatively, the network device can simultaneously implement the functions of the DSN and UR. That is, the network device is the peer device communicating with terminal 101 and can both send data information to terminal 101 and receive data sent by terminal 101. Alternatively, the network device can simultaneously implement the functions of the DSN, ESN, and UR.

[0177] In this example, the Ambient-IoT communication system may include four links, for example, link 1 for transmitting downlink information, link 2 for receiving uplink information, link 3 for sending CW, and link 4 for sending charging signals. Optionally, the nodes involved in the four links in the above embodiment, such as DSN, ESN, UR, and CWN102, can be independently configured, or can be the same node or device, or two, three, or four of them can be configured as one node or device. For example, in some embodiments, link 4 can be omitted or not exist. Optionally, the functions of the above different nodes can be implemented or supported by a single device, for example, a single device supports the functions of multiple nodes or all nodes. Alternatively, a single device corresponds to a node with only one of the above functions. A network, such as a network device, can coordinate the behavior of the above different nodes, such as DSN, ESN, UR, and CWN102, to support effective communication with the terminal 101.

[0178] In some embodiments, terminal 101 receives the indication information.

[0179] In step S2102 , CWN 102 sends a CW to terminal 101 .

[0180] In some embodiments, while the terminal 101 is performing uplink transmission, such as sending data, the CWN 102 is configured to provide the terminal 101 with a CW for reflection.

[0181] In some embodiments, the terminal 101 receives the CW in order to perform uplink transmission based on the CW.

[0182] Optionally, the terminal 101 may determine the reflected signal based on backscatter modulation according to the carrier frequency Fc of the CW.

[0183] In step S2103, the terminal 101 performs frequency division processing on the CW carrier frequency Fc to obtain a subcarrier frequency Fx.

[0184] Optionally, the subcarrier frequency may also be referred to as a subcarrier.

[0185] In some embodiments, the carrier frequency Fc of the CW may be located in the uplink spectrum or the downlink spectrum.

[0186] Optionally, referring to Table 1, the Ambient-IoT communication system can operate on the frequency division duplexing (FDD) NR operating band shown in Table 1. The second column in Table 1 is the uplink spectrum or uplink operating band, including the frequency band for base station reception (BS receive) or terminal 101 transmission (UE transmit), where F UL_low Indicates the lower limit or lower sideband of the uplink spectrum, F UL_high The third column in Table 1 is the downlink spectrum or downlink operating band, which includes the frequency band for base station transmission (BS transmit) or terminal 101 reception (UE receive), where F DL_low Indicates the lower limit or lower sideband of the downlink spectrum, F DL_high Indicates the upper limit or upper sideband of the downlink spectrum.

[0187] In the example of Table 1, the carrier frequency Fc of the CW may be located in the uplink operating frequency band or the downlink operating frequency band.

[0188] Table 1

[0189] In some embodiments, the terminal 101 may obtain the carrier frequency Fc of the CW through the indication information in step S2101.

[0190] In some embodiments, the subcarrier frequency Fx is a frequency interval Fs between the center of the uplink spectrum and the center of the downlink spectrum corresponding to the uplink spectrum, ie, Fx=Fs.

[0191] Optionally, the frequency separation may refer to a carrier centre frequency separation between an uplink spectrum and a corresponding downlink spectrum.

[0192] Optionally, as shown in Table 1, there is a corresponding relationship or binding relationship between the uplink spectrum and the downlink spectrum. The uplink spectrum and the downlink spectrum of the same NR frequency band correspond to each other, that is, the uplink spectrum and the downlink spectrum in the same row of the table correspond to each other and can be regarded as a group.

[0193] Optionally, the frequency interval Fs satisfies at least one of the following:

[0194] The frequency interval Fs is a value set according to the terminal operating frequency band;

[0195] The frequency interval Fs is indicated by the network equipment;

[0196] The frequency interval Fs is determined according to the offset value indicated by the network device, wherein the frequency interval Fs is between a first interval and a second interval, the first interval being the interval between the lower sideband of the uplink spectrum carrier and the upper sideband of the downlink spectrum carrier corresponding to the uplink spectrum, and the second interval being the interval between the upper sideband of the uplink spectrum carrier and the lower sideband of the downlink spectrum carrier corresponding to the uplink spectrum.

[0197] In one example, the set value may be preset during the process of the terminal 101 leaving the factory, or may be preset by the terminal 101 itself.

[0198] In another example, the network device may indicate the applicable Fs to the terminal 101 through indication information, such as indicating multiple Fs, and the terminal 101 selects one of them.

[0199] In another example, as shown in FIG2c , the first interval is denoted as Fs+BW, and the second interval is denoted as Fs-BW. Fs can be any value between greater than Fs-BW and less than Fs+BW. Terminal 101 determines the specific selected Fs value based on the offset value indicated by the network device.

[0200] Optionally, in this example, as shown in Table 1, different uplink spectra have different corresponding downlink spectra, and there are multiple possible corresponding frequency intervals Fs. For example, Table 2 illustrates different Fs corresponding to Table 1. Referring to Table 2, terminal 101 can determine the corresponding Fs.

[0201] Table 2

[0202] In some embodiments, terminal 101 may divide Fc using a corresponding frequency division ratio to obtain Fx.

[0203] Optionally, after determining Fc and Fx, the terminal 101 determines a corresponding frequency division ratio, and divides Fc based on the frequency division ratio to obtain Fx. For example, the frequency division ratio is (Fc / Fx).

[0204] In step S2104, the terminal 101 modulates the baseband signal on the subcarrier frequency Fx to obtain an intermediate frequency signal.

[0205] In some embodiments, the baseband signal is used to indicate information to be sent.

[0206] Optionally, the terminal 101 may determine or select a baseband signal according to an instruction or command of the node device 103 .

[0207] Optionally, the baseband signal may also be referred to as a baseband modulated signal.

[0208] In some embodiments, the terminal 101 modulates the baseband signal on Fx, performs a first spectrum shift, and obtains an intermediate frequency signal.

[0209] In step S2105 , the terminal 101 modulates the intermediate frequency signal on the CW carrier frequency Fc based on backscatter modulation to obtain a reflected signal.

[0210] In some embodiments, after obtaining the intermediate frequency signal, the terminal 101 may perform a second spectrum shift to obtain a reflected signal.

[0211] Optionally, the carrier frequency Fc is located in the downlink spectrum, and the frequency of the reflected signal is located in the uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency Fc is located in the uplink spectrum, and the frequency of the reflected signal is located in the downlink spectrum corresponding to the uplink spectrum. The correspondence between the uplink spectrum and the downlink spectrum can be referred to as shown in Table 1. The corresponding uplink spectrum and downlink spectrum refer to: the uplink spectrum of a certain NR band in the FDD band and the downlink spectrum paired with it. For example, for NR band n1, its uplink spectrum is 1920MHz–1980MHz, and the downlink spectrum corresponding to the uplink spectrum is 2110MHz–2170MHz.

[0212] In some examples, the reflected signal is a down-converted signal of a carrier frequency Fc, where the carrier frequency Fc is located in a downlink spectrum; and / or the reflected signal is an up-converted signal of a carrier frequency Fc, where the carrier frequency Fc is located in an uplink spectrum.

[0213] In one example, as shown in Table 1, if Fc is located in the downlink spectrum, the terminal 101 may perform down-conversion during the second spectrum shift, that is, the reflected signal uses the down-converted signal Fc-Fx, so that the reflected signal is located in the uplink spectrum corresponding to the downlink spectrum.

[0214] In another example, as shown in Table 1, if Fc is located in the uplink spectrum, the terminal 101 may perform up-conversion during the second spectrum shift, that is, the reflected signal uses the up-conversion signal Fc+Fx, so that the reflected signal is located in the downlink spectrum corresponding to the uplink spectrum.

[0215] In another example, as shown in Table 1, Fc is located in the uplink spectrum or the downlink spectrum. The terminal 101 can obtain the down-converted reflected signal Fc-Fx and the up-converted reflected signal Fc+Fx during the second spectrum shift.

[0216] Step S2106 : The terminal 101 sends a reflected signal to the node device 103 .

[0217] 2b , the node device 103 in this step is used to implement the UR function. For example, if the node device 103 is a network device or a relay device, the network device or relay device is the receiving end of the uplink information of the terminal 101.

[0218] In some embodiments, the node device 103 receives the reflected signal.

[0219] In some embodiments, combined with the description of the embodiment in step S2105 , the selection of the reflected signal may be completed by the terminal 101 or by the node device 103 .

[0220] In one example, terminal 101 may transmit only the upconverted reflected signal or the downconverted reflected signal to ensure that the reflected signal has a different frequency spectrum from Fc. For example, if Fc is in the uplink spectrum, terminal 101 transmits the upconverted signal Fc+Fx to node device 103. In this example, terminal 101 selects the reflected signal.

[0221] In another example, terminal 101 transmits both an upconverted reflected signal and a downconverted reflected signal to ensure that the reflected signal and Fc have different spectra. This saves terminal 101 operations, and node device 103 receives one of the two signals based on its own filtering. For example, if Fc is located in the uplink spectrum, terminal 101 transmits both the upconverted signal Fc+Fx and the downconverted signal Fc-Fx to node device 103. However, node device 103, using its own filtering, can receive only the upconverted signal Fc+Fx, i.e., the reflected signal located in the downlink spectrum, thus ensuring spectral separation between Fc and the reflected signal. In this example, node device 103 selects the reflected signal.

[0222] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", and "field" can be used interchangeably.

[0223] In some embodiments, "obtain", "get", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining by self-processing, autonomous implementation, etc.

[0224] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0225] In some embodiments, the terms "radio", "wireless", "radio access network (RAN)", "access network (AN)", "RAN-based" and the like may be used interchangeably.

[0226] In some embodiments, terms such as "moment", "time point", "time", and "time position" can be replaced with each other, and terms such as "duration", "period", "time window", "window", and "time" can be replaced with each other.

[0227] In some embodiments, the terms "component carrier (CC)", "cell", "frequency carrier", "carrier frequency" and the like can be used interchangeably.

[0228] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "a certain", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "a certain A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, a certain A, any A, or first A, etc., but not limited to this.

[0229] In some embodiments, the determination or judgment can be performed by a value represented by 1 bit (0 or 1), or by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a predetermined value), but is not limited thereto.

[0230] In some embodiments, "not expecting to receive" can be interpreted as not receiving on time domain resources and / or frequency domain resources, or as not performing subsequent processing on the data after receiving it; "not expecting to send" can be interpreted as not sending, or as sending but not expecting the recipient to respond to the content sent.

[0231] The method involved in the embodiment of the present disclosure may include at least one of steps S2101 to S2106, such as the method includes step S2102, or the method includes steps S2102 to S2106.

[0232] In some embodiments, step S2101 may be omitted, and one or more of these steps may be omitted or replaced in different embodiments.

[0233] In some embodiments, steps S2102 to S2105 are for illustration only, and other methods may be used to achieve the same purpose.

[0234] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 2 a .

[0235] FIG3a is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3a, the present disclosure embodiment relates to a communication method, which is executed by terminal 101 and includes:

[0236] Step S3101, obtain instruction information.

[0237] In some embodiments, the implementation of step S3101 can refer to the optional implementation of step S2101 in Figure 2a, which will not be repeated here.

[0238] Step S3102, obtain CW.

[0239] In some embodiments, the implementation of step S3102 can refer to the optional implementation of step S2102 in Figure 2a, which will not be repeated here.

[0240] Step S3103: Perform frequency division processing on the CW carrier frequency Fc to obtain the subcarrier frequency Fx.

[0241] In some embodiments, the implementation of step S3103 can refer to the optional implementation of step S2103 in Figure 2a, which will not be repeated here.

[0242] Step S3104: modulate the baseband signal on the subcarrier frequency Fx to obtain an intermediate frequency signal.

[0243] In some embodiments, the implementation of step S3104 can refer to the optional implementation of step S2104 in Figure 2a, which will not be repeated here.

[0244] Step S3105: modulate the intermediate frequency signal at the CW carrier frequency Fc based on backscatter modulation to obtain a reflected signal.

[0245] In some embodiments, the implementation of step S3105 can refer to the optional implementation of step S2105 in Figure 2a, which will not be repeated here.

[0246] Step S3106: Send a reflected signal.

[0247] In some embodiments, the implementation of step S3106 can refer to the optional implementation of step S2106 in Figure 2a, which will not be repeated here.

[0248] The method involved in the embodiment of the present disclosure may include at least one of steps S3101 to S3106.

[0249] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 3 a .

[0250] FIG3b is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3b, the present disclosure embodiment relates to a communication method, which is executed by terminal 101 and includes:

[0251] Step S3201, receiving the CW sent by CWN102.

[0252] In some embodiments, the implementation of step S3102 can refer to the optional implementation of step S2102 in Figure 2a, which will not be repeated here.

[0253] Step S3202: Determine a reflected signal based on backscatter modulation according to the CW carrier frequency.

[0254] In some embodiments, the implementation of step S3202 can refer to the optional implementation of steps S2102 to S2105 in Figure 2a, which will not be repeated here.

[0255] Optionally, the carrier frequency is located in the downlink spectrum, and the frequency of the reflected signal is located in the uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is located in the uplink spectrum, and the frequency of the reflected signal is located in the downlink spectrum corresponding to the uplink spectrum.

[0256] In some embodiments, this step may include:

[0257] Perform frequency division on the CW carrier frequency to obtain the subcarrier frequency;

[0258] Modulating a baseband signal on a subcarrier frequency to obtain an intermediate frequency signal, wherein the baseband signal is used to indicate information to be transmitted;

[0259] Based on backscatter modulation, the intermediate frequency signal is modulated on the CW carrier frequency to obtain the reflected signal.

[0260] In some embodiments, the subcarrier frequency is a frequency interval between a center of an uplink spectrum and a center of a downlink spectrum corresponding to the uplink spectrum.

[0261] In some embodiments, the frequency spacing satisfies at least one of the following:

[0262] The frequency interval is a value set according to the terminal's operating frequency band;

[0263] The frequency interval is indicated by the network equipment;

[0264] The frequency interval is determined according to the offset value indicated by the network device, wherein the frequency interval is between a first interval and a second interval, the first interval being the interval between the lower sideband of the uplink spectrum carrier and the upper sideband of the downlink spectrum carrier corresponding to the uplink spectrum, and the second interval being the interval between the upper sideband of the uplink spectrum carrier and the lower sideband of the downlink spectrum carrier corresponding to the uplink spectrum.

[0265] Step S3203 : Send a reflected signal to the node device 103 .

[0266] In some embodiments, the implementation of step S3203 can refer to the optional implementation of step S2106 in Figure 2a, which will not be repeated here.

[0267] In some embodiments, the reflected signal is a down-converted signal of a carrier frequency, wherein the carrier frequency is located in a downlink spectrum; and / or,

[0268] The reflected signal is an up-converted signal of the carrier frequency, wherein the carrier frequency is located in the uplink spectrum.

[0269] In some embodiments, the method further comprises:

[0270] The indication information sent by the receiving node device is used to instruct the terminal to perform backscattering and / or to indicate a carrier frequency of a CW.

[0271] In some embodiments, the node device is a network device or a relay device.

[0272] The method involved in the embodiment of the present disclosure may include at least one of steps S3201 to S3203.

[0273] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 3 b .

[0274] FIG4a is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4a, the present disclosure embodiment relates to a communication method, which is executed by CWN 102 and includes:

[0275] Step S4101, send CW.

[0276] In some embodiments, the implementation of step S4101 can refer to the optional implementation of step S2102 in Figure 2a, which will not be repeated here.

[0277] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 4 a .

[0278] FIG4 b is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4 b , the present disclosure embodiment relates to a communication method, which is executed by CWN 102 and includes:

[0279] Step S4201, sending CW to terminal 101.

[0280] In some embodiments, the implementation of step S4201 can refer to the optional implementation of step S2102 in Figure 2a, which will not be repeated here.

[0281] Optionally, CW is used for the terminal to determine the reflected signal based on backscatter modulation according to the carrier frequency of CW, wherein the carrier frequency is located in the downlink spectrum and the frequency of the reflected signal is located in the uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is located in the uplink spectrum and the frequency of the reflected signal is located in the downlink spectrum corresponding to the uplink spectrum; the terminal is an Ambient-IoT terminal.

[0282] In some embodiments, the CW carrier frequency is used by the terminal to obtain a sub-carrier frequency, and the sub-carrier frequency is used by the terminal to obtain an intermediate frequency signal and a reflected signal.

[0283] In some embodiments, the subcarrier frequency is a frequency interval between a center of an uplink spectrum and a center of a downlink spectrum corresponding to the uplink spectrum.

[0284] In some embodiments, the frequency spacing satisfies at least one of the following:

[0285] The frequency interval is a value set according to the terminal's operating frequency band;

[0286] The frequency interval is indicated by the network equipment;

[0287] The frequency interval is determined according to the offset value indicated by the network device, wherein the frequency interval is between a first interval and a second interval, the first interval being the interval between the lower sideband of the carrier located in the uplink spectrum and the upper sideband of the downlink spectrum carrier corresponding to the uplink spectrum, and the second interval being the interval between the upper sideband of the uplink spectrum carrier and the lower sideband of the downlink spectrum carrier corresponding to the uplink spectrum.

[0288] In some embodiments, the reflected signal is a down-converted signal of a carrier frequency, wherein the carrier frequency is located in a downlink spectrum; or

[0289] The reflected signal is an up-converted signal of the carrier frequency, wherein the carrier frequency is located in the uplink spectrum.

[0290] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 4 b .

[0291] FIG5a is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG5a, the present disclosure embodiment relates to a communication method, which is executed by a node device 103 and includes:

[0292] Step S5101, sending instruction information.

[0293] In some embodiments, the implementation of step S5101 can refer to the optional implementation of step S2101 in Figure 2a, which will not be repeated here.

[0294] Step S5102: Acquire the reflected signal.

[0295] In some embodiments, the implementation of step S5102 can refer to the optional implementation of step S2106 in Figure 2a, which will not be repeated here.

[0296] The method involved in the embodiment of the present disclosure may include at least one of steps S5101 to S5102.

[0297] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 5 a .

[0298] FIG5b is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG5b, the present disclosure embodiment relates to a communication method, which is executed by node device 103 and includes:

[0299] Step S5201: Receive the reflected signal sent by terminal 101.

[0300] In some embodiments, the implementation of step S5201 can refer to the optional implementation of step S2106 in Figure 2a, which will not be repeated here.

[0301] Optionally, the reflected signal is determined by the terminal according to the carrier frequency of the CW sent by the CWN, the carrier frequency is located in the downlink spectrum, and the frequency of the reflected signal is located in the uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is located in the uplink spectrum, and the frequency of the reflected signal is located in the downlink spectrum corresponding to the uplink spectrum; the terminal is an Ambient-IoT terminal that obtains energy from the environment.

[0302] In some embodiments, the CW carrier frequency is used by the terminal to obtain a sub-carrier frequency, and the sub-carrier frequency is used by the terminal to obtain an intermediate frequency signal and a reflected signal.

[0303] In some embodiments, the subcarrier frequency is a frequency interval between a center of an uplink spectrum and a center of a downlink spectrum corresponding to the uplink spectrum.

[0304] In some embodiments, the frequency spacing satisfies at least one of the following:

[0305] The frequency interval is a value set according to the terminal's operating frequency band;

[0306] The frequency interval is indicated by the network equipment;

[0307] The frequency interval is determined according to the offset value indicated by the network device, wherein the frequency interval is between a first interval and a second interval, the first interval being the interval between the lower sideband of the uplink spectrum carrier and the upper sideband of the downlink spectrum carrier corresponding to the uplink spectrum, and the second interval being the interval between the upper sideband of the uplink spectrum carrier and the lower sideband of the downlink spectrum carrier corresponding to the uplink spectrum.

[0308] In some embodiments, the reflected signal is a down-converted signal of a carrier frequency, wherein the carrier frequency is located in a downlink spectrum; or

[0309] The reflected signal is an up-converted signal of the carrier frequency, wherein the carrier frequency is located in the uplink spectrum.

[0310] In some embodiments, the method further comprises:

[0311] Sending instruction information to the terminal, where the instruction information is used to instruct the terminal to perform backscattering and / or to indicate a carrier frequency of a CW.

[0312] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 5 b .

[0313] The method of the embodiments of the present disclosure proposes using a backscattering device to implement spectrum shifting so that the CW signal and the reflected signal are located in the uplink and downlink spectrum or the downlink and uplink spectrum, respectively, to reduce the implementation complexity of the base station or intermediate node and improve the system's reception performance. To facilitate understanding of the embodiments of the present disclosure, some examples are listed below:

[0314] Example 1:

[0315] The backscatter device divides the carrier frequency Fc of the received CW signal in a certain pattern to obtain a subcarrier Fx, then modulates the baseband modulation signal onto the subcarrier to obtain an intermediate frequency signal, and then modulates the intermediate frequency signal onto the CW carrier through backscatter modulation and transmits it.

[0316] Optionally, the backscatter device corresponds to the terminal 101 in the aforementioned embodiment.

[0317] Example 2:

[0318] Based on Example 1, the carrier frequency Fx of the subcarrier signal may be the frequency interval between the centers of the uplink and downlink spectrum as shown in Table 2, ie, Fx=Fs.

[0319] Optionally, Fs can be a preset value based on the frequency band in which the backscatter device operates, or can be selected based on network instructions; it can also be any value greater than Fs-BW and less than Fs+BW. The specific value to be selected can be determined by the network indicating the specific offset, as shown in Figure 2c.

[0320] Example 3:

[0321] Based on Example 1 or Example 2, the CW carrier frequency Fc can be located in the downlink spectrum, and the reflected signal undergoes secondary frequency modulation, selecting the downconverted signal Fc-Fx. The CW carrier frequency Fc can also be located in the uplink spectrum, and the reflected signal undergoes secondary frequency modulation, selecting the upconverted signal Fc+Fx. The selection of the secondary frequency modulated signal can be performed by the backscatter device, the network, or an intermediate node device.

[0322] Example 4:

[0323] Based on any one or more of the above examples, the network or intermediate node sends a command signal to a device using backscatter, notifying the device of the CW signal's carrier frequency. Upon receiving this information, the backscatter device determines the corresponding Fx and shifts the baseband signal to be transmitted onto the Fx carrier frequency to generate an intermediate frequency signal. The intermediate frequency signal is then modulated onto the CW signal's carrier frequency through backscatter modulation and reflected. The network or intermediate node selects the received signal based on its operating frequency band.

[0324] The embodiments of the present disclosure further provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a node device or network device (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0325] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0326] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution 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 relationship of the hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by 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 implementing the hardware circuit configuration 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. In addition, 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.

[0327] FIG6a is a schematic diagram of the structure of the terminal proposed in an embodiment of the present disclosure. As shown in FIG6a, the terminal 6100 may include: at least one of a transceiver module 6101 and a processing module 6102. In some embodiments, the transceiver module 6101 is used to receive a CW sent by a CWN; the processing module 6102 is used to determine a reflected signal based on backscatter modulation according to the carrier frequency of the CW, wherein the carrier frequency is located in the downlink spectrum and the frequency of the reflected signal is located in the uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is located in the uplink spectrum and the frequency of the reflected signal is located in the downlink spectrum corresponding to the uplink spectrum; the transceiver module 6101 is also used to send the reflected signal to a node device; wherein the terminal is an Ambient-IoT terminal.

[0328] Optionally, the transceiver module 6101 is used to perform at least one of the communication steps such as sending and / or receiving performed by the terminal 6100 in any of the above methods, which will not be described in detail here. Optionally, the processing module 6102 is used to perform at least one of the other steps performed by the terminal 6100 in any of the above methods, which will not be described in detail here.

[0329] Figure 6b is a schematic diagram of the structure of a CWN device proposed in an embodiment of the present disclosure. As shown in Figure 6b, CWN device 6200 may include at least one of a transceiver module 6201 and a processing module 6202. In some embodiments, transceiver module 6201 is configured to transmit a CW to a terminal, where the CW is used by the terminal to determine a backscatter-modulated reflected signal based on the carrier frequency of the CW, wherein the carrier frequency is within a downlink spectrum and the frequency of the reflected signal is within an uplink spectrum corresponding to the downlink spectrum; alternatively, the carrier frequency is within an uplink spectrum and the frequency of the reflected signal is within a downlink spectrum corresponding to the uplink spectrum; and the terminal is an Ambient-IoT terminal.

[0330] Optionally, the transceiver module 6201 is configured to execute at least one of the communication steps, such as sending and / or receiving, performed by the CWN device 6200 in any of the above methods, and details thereof are omitted here. Optionally, the processing module 6202 is configured to execute at least one of the other steps performed by the CWN device 6200 in any of the above methods, and details thereof are omitted here.

[0331] Figure 6c is a schematic diagram of the structure of a node device proposed in an embodiment of the present disclosure. As shown in Figure 6c, the node device 6300 may include: at least one of a transceiver module 6301, a processing module 6302, etc. In some embodiments, the transceiver module 6301 is used to receive a reflected signal sent by a terminal, wherein the reflected signal is determined by the terminal based on the carrier frequency of the CW sent by the CWN, the carrier frequency is in the downlink spectrum, and the frequency of the reflected signal is in the uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is in the uplink spectrum, and the frequency of the reflected signal is in the downlink spectrum corresponding to the uplink spectrum; the terminal is an Ambient-IoT terminal that obtains energy from the environment.

[0332] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0333] In some embodiments, the processing module can be a single module or can include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be interchangeable with the processor.

[0334] Figure 7a is a schematic diagram of the structure of a communication device 7100 proposed in an embodiment of the present disclosure. Communication device 7100 can be a node device or network device (e.g., an access network device, a core network device, etc.), or a terminal (e.g., a user device, etc.). It can also be a chip, chip system, or processor that supports a network device to implement any of the above methods, or a chip, chip system, or processor that supports a terminal to implement any of the above methods. Communication device 7100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0335] As shown in Figure 7a, the communication device 7100 includes one or more processors 7101. The processor 7101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process the communication protocol and communication data, and the central processing unit can be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process program data. Optionally, the communication device 7100 is used to perform any of the above methods. Optionally, one or more processors 7101 are used to call instructions to enable the communication device 7100 to perform any of the above methods.

[0336] In some embodiments, the communication device 7100 further includes one or more transceivers 7102. When the communication device 7100 includes one or more transceivers 7102, the transceiver 7102 performs at least one of the communication steps, such as sending and / or receiving, in the above-described method, and the processor 7101 performs at least one of the other steps. In an optional embodiment, the transceiver may include a receiver and / or a transmitter, and the receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, and interface may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0337] In some embodiments, the communication device 7100 further includes one or more memories 7103 for storing data. Alternatively, all or part of the memories 7103 may be located outside the communication device 7100. In alternative embodiments, the communication device 7100 may include one or more interface circuits 7104. Optionally, the interface circuits 7104 are connected to the memories 7103 and may be configured to receive data from the memories 7103 or other devices, or to send data to the memories 7103 or other devices. For example, the interface circuits 7104 may read data stored in the memories 7103 and send the data to the processor 7101.

[0338] The communication device 7100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 7100 described in the present disclosure is not limited thereto, and the structure of the communication device 7100 may not be limited by FIG. 7a. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (7) others, etc.

[0339] FIG7 b is a schematic diagram of the structure of a chip 7200 according to an embodiment of the present disclosure. If the communication device 7100 can be a chip or a chip system, reference can be made to the schematic diagram of the structure of the chip 7200 shown in FIG7 b , but the present disclosure is not limited thereto.

[0340] The chip 7200 includes one or more processors 7201. The chip 7200 is configured to execute any of the above methods.

[0341] In some embodiments, chip 7200 further includes one or more interface circuits 7202. Alternatively, terms such as interface circuit, interface, and transceiver pins may be used interchangeably. In some embodiments, chip 7200 further includes one or more memories 7203 for storing data. Alternatively, all or part of memory 7203 may be located external to chip 7200. Optionally, interface circuit 7202 is connected to memory 7203 and may be used to receive data from memory 7203 or other devices, or may be used to send data to memory 7203 or other devices. For example, interface circuit 7202 may read data stored in memory 7203 and send the data to processor 7201.

[0342] In some embodiments, the interface circuit 7202 performs at least one of the communication steps, such as sending and / or receiving, in the above-described method. For example, the interface circuit 7202 performing the communication steps, such as sending and / or receiving, in the above-described method means that the interface circuit 7202 performs data exchange between the processor 7201, the chip 7200, the memory 7203, or the transceiver device. In some embodiments, the processor 7201 performs at least one of the other steps.

[0343] The modules and / or devices described in various embodiments, such as virtual devices, physical devices, and chips, can be arbitrarily combined or separated according to circumstances. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0344] The present disclosure also proposes a storage medium having instructions stored thereon. When the instructions are executed on the communication device 7100, the communication device 7100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a temporary storage medium.

[0345] The present disclosure also provides a program product, which, when executed by the communication device 7100, enables the communication device 7100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0346] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods. Industrial Applicability

[0347] After receiving the CW, the Ambient-IoT terminal can determine the corresponding reflected signal so that the CW carrier frequency and the frequency of the reflected signal are located in the uplink spectrum and downlink spectrum respectively. This ensures good isolation between the downlink CW signal and the uplink transmission signal in the frequency domain, thereby improving the system's reception performance and reducing the complexity of the base station or intermediate nodes.

Claims

1. A communication method, performed by a terminal, comprising: Receive the continuous electromagnetic wave CW sent by the continuous electromagnetic wave node CWN; Determining a reflected signal based on backscatter modulation according to the carrier frequency of the CW, wherein the carrier frequency is in a downlink spectrum and the frequency of the reflected signal is in an uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is in an uplink spectrum and the frequency of the reflected signal is in a downlink spectrum corresponding to the uplink spectrum; Sending the reflected signal to the node device; The terminal is an Ambient-IoT terminal that obtains energy from the environment.

2. The method according to claim 1, wherein The determining, according to the carrier frequency of the CW, a reflected signal based on backscatter modulation, includes: Performing frequency division processing on the CW carrier frequency to obtain a subcarrier frequency; Modulating a baseband signal on the subcarrier frequency to obtain an intermediate frequency signal, wherein the baseband signal is used to indicate information to be sent; The intermediate frequency signal is modulated on the CW carrier frequency based on backscatter modulation to obtain the reflected signal.

3. The method according to claim 2, wherein: The subcarrier frequency is a frequency interval between the center of an uplink spectrum and the center of a downlink spectrum corresponding to the uplink spectrum.

4. The method according to claim 3, wherein: The frequency interval satisfies at least one of the following: The frequency interval is a value set according to the operating frequency band of the terminal; The frequency interval is indicated by the network device; The frequency interval is determined according to the offset value indicated by the network device, wherein the frequency interval is between a first interval and a second interval, the first interval being the interval between the lower sideband of the uplink spectrum carrier and the upper sideband of the downlink spectrum carrier corresponding to the uplink spectrum, and the second interval being the interval between the upper sideband of the uplink spectrum carrier and the lower sideband of the downlink spectrum carrier corresponding to the uplink spectrum.

5. The method according to any one of claims 1 to 4, wherein: The reflected signal is a down-converted signal of the carrier frequency, wherein the carrier frequency is located in a downlink spectrum; and / or, The reflected signal is an up-converted signal of the carrier frequency, wherein the carrier frequency is located in an uplink spectrum.

6. The method according to any one of claims 1 to 5, wherein: The method further comprises: Receive indication information sent by the node device, where the indication information is used to instruct the terminal to perform backscattering and / or to indicate a carrier frequency of the CW.

7. The method according to any one of claims 1 to 6, wherein: The node device is a network device or a relay device.

8. A communication method, performed by a continuous electromagnetic wave node (CWN), comprising: A CW is sent to a terminal, where the CW is used by the terminal to determine a reflected signal based on backscatter modulation according to a carrier frequency of the CW, wherein the carrier frequency is in a downlink spectrum and the frequency of the reflected signal is in an uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is in an uplink spectrum and the frequency of the reflected signal is in a downlink spectrum corresponding to the uplink spectrum; the terminal is an Ambient-IoT terminal.

9. The method of claim 8, wherein: The carrier frequency of the CW is used by the terminal to obtain a sub-carrier frequency, and the sub-carrier frequency is used by the terminal to obtain an intermediate frequency signal and the reflected signal.

10. The method of claim 9, wherein: The subcarrier frequency is a frequency interval between the center of an uplink spectrum and the center of a downlink spectrum corresponding to the uplink spectrum.

11. The method according to claim 10, wherein: The frequency interval satisfies at least one of the following: The frequency interval is a value set according to the operating frequency band of the terminal; The frequency interval is indicated by the network device; The frequency interval is determined according to the offset value indicated by the network device, wherein the frequency interval is between a first interval and a second interval, the first interval being the interval between a lower sideband of a carrier located in an uplink spectrum and an upper sideband of a carrier located in a downlink spectrum corresponding to the uplink spectrum, and the second interval being the interval between an upper sideband of a carrier located in an uplink spectrum and a lower sideband of a carrier located in a downlink spectrum corresponding to the uplink spectrum.

12. The method according to any one of claims 8 to 11, wherein: The reflected signal is a down-converted signal of the carrier frequency, wherein the carrier frequency is located in a downlink spectrum; or The reflected signal is an up-converted signal of the carrier frequency, wherein the carrier frequency is located in an uplink spectrum.

13. A communication method, performed by a node device, comprising: A reflected signal sent by a receiving terminal, wherein the reflected signal is determined by the terminal according to the carrier frequency of the CW sent by the CWN, the carrier frequency is in a downlink spectrum, and the frequency of the reflected signal is in an uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is in an uplink spectrum, and the frequency of the reflected signal is in a downlink spectrum corresponding to the uplink spectrum; the terminal is an Ambient-IoT terminal that obtains energy from the environment.

14. The method of claim 13, wherein: The carrier frequency of the CW is used by the terminal to obtain a sub-carrier frequency, and the sub-carrier frequency is used by the terminal to obtain an intermediate frequency signal and the reflected signal.

15. The method of claim 14, wherein: The subcarrier frequency is a frequency interval between the center of an uplink spectrum and the center of a downlink spectrum corresponding to the uplink spectrum.

16. The method of claim 15, wherein: The frequency interval satisfies at least one of the following: The frequency interval is a value set according to the operating frequency band of the terminal; The frequency interval is indicated by the network device; The frequency interval is determined according to the offset value indicated by the network device, wherein the frequency interval is between a first interval and a second interval, the first interval being the interval between the lower sideband of the uplink spectrum carrier and the upper sideband of the downlink spectrum carrier corresponding to the uplink spectrum, and the second interval being the interval between the upper sideband of the uplink spectrum carrier and the lower sideband of the downlink spectrum carrier corresponding to the uplink spectrum.

17. The method according to any one of claims 13 to 16, wherein: The reflected signal is a down-converted signal of the carrier frequency, wherein the carrier frequency is located in a downlink spectrum; or The reflected signal is an up-converted signal of the carrier frequency, wherein the carrier frequency is located in an uplink spectrum.

18. The method according to any one of claims 13 to 17, wherein: The method further comprises: Sending indication information to the terminal, where the indication information is used to instruct the terminal to perform backscattering and / or to indicate a carrier frequency of the CW.

19. A terminal comprising: Transceiver module, used to receive CW sent by CWN; a processing module, configured to determine a reflected signal based on backscatter modulation according to a carrier frequency of the CW, wherein the carrier frequency is in a downlink spectrum and the frequency of the reflected signal is in an uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is in an uplink spectrum and the frequency of the reflected signal is in a downlink spectrum corresponding to the uplink spectrum; The transceiver module is further configured to send the reflected signal to the node device; Wherein, the terminal is an Ambient-IoT terminal.

20. A CWN device, comprising: A transceiver module is configured to send a CW to a terminal, where the CW is used by the terminal to determine a reflected signal based on backscatter modulation according to the carrier frequency of the CW, wherein the carrier frequency is located in a downlink spectrum and the frequency of the reflected signal is located in an uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is located in an uplink spectrum and the frequency of the reflected signal is located in a downlink spectrum corresponding to the uplink spectrum; and the terminal is an Ambient-IoT terminal.

21. A node device, comprising: A transceiver module is configured to receive a reflected signal sent by a terminal, wherein the reflected signal is determined by the terminal based on the carrier frequency of the CW sent by the CWN, the carrier frequency is in a downlink spectrum, and the frequency of the reflected signal is in an uplink spectrum corresponding to the downlink spectrum; or, the carrier frequency is in an uplink spectrum, and the frequency of the reflected signal is in a downlink spectrum corresponding to the uplink spectrum; the terminal is an Ambient-IoT terminal that obtains energy from the environment.

22. A communication device comprising: one or more processors; The communication device is configured to execute the method according to any one of claims 1 to 7, any one of claims 8 to 12, or any one of claims 13 to 18.

23. A communication system comprising a terminal, a CWN device and a node device, wherein: The terminal is configured to implement the method according to any one of claims 1 to 7; The CWN device is configured to implement the method according to any one of claims 8 to 12; The node device is configured to implement the method according to any one of claims 13 to 18.

24. A storage medium storing instructions, wherein: When the instruction is executed on the communication device, the communication device is caused to execute any one of claims 1 to 7, 8 to The method according to any one of items 12 or 13 to 18.

25. A program product, wherein When the program product is executed by a communication device, the communication device is caused to execute the method according to any one of claims 1 to 7, any one of 8 to 12, or any one of 13 to 18.

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