Signal transmission methods, apparatuses, and storage medium

Abstract

Provided in the embodiments of the present disclosure are signal transmission methods, apparatuses, and a storage medium. A signal transmission method comprises: receiving a first signal and / or an excitation signal; and, on the basis of the first signal and / or the excitation signal, sending a second signal.

Description

Signal transmission method, device, and storage medium

[0001] This disclosure claims priority to Chinese patent application No. 202410123615.7, filed on January 29, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the field of communication technologies, and in particular to a signal transmission method, device, and storage medium. Background Art

[0003] To achieve the Internet of Everything (IoE), we need to introduce the ambient Internet of Things (Ambient IoT). Ambient IoT may utilize new technologies such as backscatter communication and energy harvesting. Backscatter communication is a communication method that transmits data by reflecting an excitation signal.

[0004] Summary of the Invention

[0005] In one aspect, a signal transmission method is provided, applied to a first node. The signal transmission method includes:

[0006] receiving a first signal and / or an excitation signal;

[0007] Based on the first signal and / or the excitation signal, a second signal is sent.

[0008] In another aspect, a signal transmission method is provided, which is applied to a second node. The signal transmission method includes:

[0009] Sending a first signal and / or an excitation signal to the first node;

[0010] A second signal sent by the second node in response to the first signal and / or the stimulation signal is received.

[0011] In another aspect, a communication device is provided, which includes a receiving module and a sending module.

[0012] The receiving module is used to receive the first signal and / or the excitation signal;

[0013] The sending module is configured to send a second signal based on the first signal and / or the excitation signal.

[0014] In yet another aspect, a communication device is provided, comprising: a processor and a memory for storing instructions executable by the processor, wherein the processor is configured to execute the instructions so that the communication device performs the signal transmission method described in any one of the above aspects.

[0015] On the other hand, a computer-readable storage medium is provided, on which computer program instructions are stored. When the computer program instructions are executed by a processor, the signal transmission method described in any of the above aspects is implemented.

[0016] On the other hand, a computer program product is provided, which includes computer program instructions, and when the computer program instructions are executed by a processor, the signal transmission method described in any one of the above aspects is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings.

[0018] FIG1 is a schematic diagram of the architecture of a communication system according to some embodiments of the present disclosure.

[0019] FIG2 is a flowchart of a signal transmission method according to some embodiments of the present disclosure.

[0020] FIG3 is a schematic diagram of a signal distribution according to some embodiments of the present disclosure.

[0021] FIG4 is a schematic diagram of another signal distribution according to some embodiments of the present disclosure.

[0022] FIG5 is a schematic diagram of yet another signal distribution according to some embodiments of the present disclosure.

[0023] FIG6 is a schematic diagram of yet another signal distribution according to some embodiments of the present disclosure.

[0024] FIG7 is a schematic diagram of yet another signal distribution according to some embodiments of the present disclosure.

[0025] FIG8 is a schematic diagram of yet another signal distribution according to some embodiments of the present disclosure.

[0026] FIG9 is a schematic diagram of yet another signal distribution according to some embodiments of the present disclosure.

[0027] FIG10 is a schematic diagram of yet another signal distribution according to some embodiments of the present disclosure.

[0028] FIG11 is a schematic diagram of yet another signal distribution according to some embodiments of the present disclosure.

[0029] FIG12 is a flowchart of another signal transmission method according to some embodiments of the present disclosure.

[0030] FIG13 is a schematic structural diagram of a communication device according to some embodiments of the present disclosure.

[0031] FIG14 is a schematic structural diagram of another communication device according to some embodiments of the present disclosure.

[0032] FIG15 is a schematic diagram showing the structure of a communication device according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0033] To help those skilled in the art better understand the technical solutions of the embodiments of the present disclosure, the technical solutions of the present disclosure will be clearly and completely described below in conjunction with the drawings in the present disclosure. Obviously, the embodiments described are only some of the embodiments of the present disclosure, not all of them. Based on the embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0034] It should be noted that in this disclosure, words such as "exemplarily" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this disclosure as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplarily" or "for example" is intended to present the relevant concepts in a concrete manner.

[0035] In the following, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Therefore, a feature defined with the terms "first," "second," etc., may explicitly or implicitly include one or more of such features.

[0036] In the description of this disclosure, unless otherwise specified, " / " means "or." For example, A / B can mean A or B. "And / or" herein is merely a description of an association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: only A, only B, and both A and B. Furthermore, "at least one" means one or more, and "a plurality" means two or more.

[0037] In Ambient IoT, devices communicate wirelessly with base stations to transmit data to the network. Since some devices don't require battery power, they can harvest energy from vibrations and ambient light, and use backscatter communication to communicate with other devices. This enables Ambient IoT devices to have very low power consumption and a very long lifespan. Backscatter communication is a communication method that transmits data by reflecting an excitation signal.

[0038] The network architecture of the communication network (including but not limited to 3G, 4G, 5G and future mobile communication networks) in the embodiments of the present disclosure may include a first node (for example, including but not limited to a terminal, a passive device) and a second node (for example, including but not limited to a terminal, a relay device, a base station).

[0039] Figure 1 illustrates a schematic diagram of the architecture of a communication system provided by an embodiment of the present disclosure, using the example of an Ambient IoT device as the first node and a base station as the second node. As shown in Figure 1 , communication system 10 includes a base station 11 and an Ambient IoT device 12. Base station 11 and Ambient IoT device 12 are communicatively connected. This disclosure does not limit the second node to being a base station; the second node may also be a terminal, etc.

[0040] In some embodiments, a base station 11 is used to provide wireless access services to multiple Ambient IoT devices 12. Specifically, a base station 11 provides a service coverage area (also known as a cell). Ambient IoT devices 12 that enter this area can communicate with the base station 11 via wireless signals to receive the wireless access services provided by the base station 11. The service coverage areas of base stations 11 may overlap, and an Ambient IoT device 12 within the overlapping area can receive wireless signals from multiple base stations 11.

[0041] In some embodiments, base station 11 can connect to multiple Ambient IoT devices 12. For example, base station 11 can connect to Ambient IoT device 12 and Ambient IoT device 12. Ambient IoT device 12 and Ambient IoT device 12 can be located in the same cell, or in different cells. In other words, one base station 11 can provide network services to Ambient IoT device 12 in one cell, or to Ambient IoT devices 12 in multiple cells simultaneously.

[0042] In some embodiments, the base station 11 can be a base station or an evolved base station (eNB or eNodeB) in long term evolution (LTE), long term evolution advanced (LTEA), a base station in a 5G network, or a base station in a future communication system, etc. The base station can include various macro base stations, micro base stations, home base stations, wireless remote devices, reconfigurable intelligent surfaces (RISs), routers, wireless fidelity (WIFI) devices, or various network side devices such as primary cells and collaborative cells (secondary cells).

[0043] In some embodiments, the Ambient IoT device 12 can be a device with wireless transceiver capabilities and can be deployed on land, including indoors or outdoors, handheld, wearable, or vehicle-mounted; can also be deployed on water (e.g., on ships); and can also be deployed in the air (e.g., on airplanes, balloons, and satellites). The Ambient IoT device can be a terminal, a passive sensor, a passive radio frequency identification (RFID) tag, etc., and the embodiments of the present disclosure are not limited to this.

[0044] It should be understood that Figure 1 is an exemplary structural diagram, and the number of devices included in the communication system shown in Figure 1 in the embodiments of the present disclosure is not limited. For example, there is no limit on the number of base stations or the number of Ambient IoT devices. Furthermore, in addition to the devices shown in Figure 1, the communication system shown in Figure 1 may also include other devices, which are not limited in this regard.

[0045] Figure 2 is a flow chart of a signal transmission method provided by an embodiment of the present disclosure. For example, the signal transmission method provided by the present disclosure can be applied to the network architecture shown in Figure 1, and further, can be applied to the Ambient IoT device in Figure 1.

[0046] As shown in FIG. 2 , the signal transmission method provided by the present disclosure may include the following S201 - S202 .

[0047] S201: Receive a first signal and / or an excitation signal.

[0048] S202: Send a second signal based on the first signal and / or the excitation signal.

[0049] It should be understood that in the embodiment of the present disclosure, the first node is an Ambient IoT device as an example. The first signal mentioned here can be a downlink signal sent by the base station to the Ambient IoT device, and the second signal is an uplink signal sent by the Ambient IoT device to the base station.

[0050] In some embodiments, the second signal may be a backscattered signal corresponding to the excitation signal.

[0051] In some embodiments, the second signal may also be a signal generated by an Ambient IoT device.

[0052] In the following description, an example is given in which the first frequency band is a downlink frequency band of an FDD system and the second frequency band is an uplink frequency band of the FDD system.

[0053] Case 1

[0054] In some embodiments, the first signal is in a first frequency band and the second signal is in a second frequency band.

[0055] In one implementation, the relationship between the first signal and the second signal satisfies at least one of the following:

[0056] The first signal is located in the first region or the second region of the first frequency band;

[0057] The frequency domain interval between the first signal and the first reference point is smaller than the first interval;

[0058] The second signal is located in the first region or the second region of the second frequency band;

[0059] The frequency domain interval between the second signal and the second reference point is smaller than the second interval;

[0060] The first interval and the second interval are respectively determined according to one of the following: a fixed value, a pre-set value, the first node type, the way the first node obtains energy, the coverage capability of the first node, the type of area where the first signal is located, the type of area where the second signal is located, the first frequency band position, the second frequency band position, and the transmission method of the second signal.

[0061] Situation 1-1

[0062] In one implementation, the excitation signal is also located in the second frequency band, and the relationship between the excitation signal and the second signal satisfies at least one of the following:

[0063] The excitation signal is located in the first region or the second region of the second frequency band;

[0064] The second signal is located in the first region or the second region of the second frequency band.

[0065] That is, with respect to the relationship between the first signal and the excitation signal, in one example, as shown in FIG3 , the first signal is within the protection band of the first frequency band, and the excitation signal is within the protection band of the second frequency band. In another example, as shown in FIG4 , the first signal is within the band of the first frequency band, and the excitation signal is within the protection band of the second frequency band. In another example, as shown in FIG5 , the first signal is within the protection band of the first frequency band, and the excitation signal is within the band of the second frequency band. In another example, as shown in FIG6 , the first signal is within the band of the first frequency band, and the excitation signal is within the band of the second frequency band.

[0066] Regarding the relationship between the second signal and the excitation signal, as shown in FIG7 , the second signal is within the guard band of the second frequency band, and the excitation signal is within the guard band of the second frequency band. In another example, as shown in FIG8 , the second signal is within the band of the second frequency band, and the excitation signal is within the guard band of the second frequency band. In another example, as shown in FIG9 , the second signal is within the guard band of the second frequency band, and the excitation signal is within the band of the second frequency band. In another example, as shown in FIG10 , the second signal is within the band of the second frequency band, and the excitation signal is within the band of the second frequency band.

[0067] Situation 1-2

[0068] In one implementation, the excitation signal is in the first frequency band, and the relationship between the excitation signal and the first signal satisfies at least one of the following:

[0069] The excitation signal is located in the first region or the second region of the first frequency band;

[0070] The first signal is located in the first region or the second region of the first frequency band;

[0071] The bandwidth of the excitation signal is M times the bandwidth of the first signal, where M is a positive number.

[0072] That is, in one example, the first signal is within the guard band of the first frequency band, and the excitation signal is within the guard band of the first frequency band. In another example, the first signal is within the band of the first frequency band, and the excitation signal is within the guard band of the first frequency band. In another example, the first signal is within the guard band of the first frequency band, and the excitation signal is within the band of the first frequency band. In yet another example, the first signal is within the band of the first frequency band, and the excitation signal is within the band of the first frequency band.

[0073] Case 2

[0074] In some embodiments, the first signal and the second signal are in a first frequency band.

[0075] In one implementation, the relationship between the first signal and the second signal satisfies at least one of the following:

[0076] The first signal is located in the first region or the second region of the first frequency band;

[0077] The second signal is located in the first region or the second region of the first frequency band;

[0078] The frequency domain interval between the first signal and the second reference point is smaller than the third interval;

[0079] The frequency domain interval between the second signal and the first reference point is smaller than a fourth interval;

[0080] The frequency domain interval between the first signal and the second signal is smaller than the fifth interval.

[0081] The third interval, the fourth interval and the fifth interval are respectively determined according to at least one of the following: a fixed value, a pre-set value, the first node type, the way the first node obtains energy, the coverage capability of the first node, the type of area where the first signal is located, the type of area where the second signal is located, the first frequency band position, the second frequency band position, and the transmission method based on the second signal.

[0082] Situation 2-1

[0083] In one implementation, the excitation signal is also in the first frequency band, and the relationship between the excitation signal and the second signal satisfies at least one of the following:

[0084] The excitation signal is located in the first region or the second region of the first frequency band;

[0085] The second signal is located in the first region or the second region of the first frequency band;

[0086] The frequency domain interval between the excitation signal and the second signal is a sixth interval.

[0087] That is, in one example, the second signal is within the guard band of the first frequency band, and the excitation signal is within the guard band of the first frequency band. In another example, the second signal is within the band of the first frequency band, and the excitation signal is within the guard band of the first frequency band. In another example, the second signal is within the guard band of the first frequency band, and the excitation signal is within the band of the first frequency band. In yet another example, the second signal is within the band of the first frequency band, and the excitation signal is within the band of the first frequency band.

[0088] Situation 2-2

[0089] In one implementation, the excitation signal is also in the first frequency band, and the relationship between the excitation signal and the first signal satisfies at least one of the following:

[0090] The excitation signal is located in the first region or the second region of the first frequency band;

[0091] The first signal is located in the first region or the second region of the first frequency band;

[0092] The bandwidth of the excitation signal is M times the bandwidth of the first signal, where M is a positive number.

[0093] That is, in one example, the first signal is within the guard band of the first frequency band, and the excitation signal is within the guard band of the first frequency band. In another example, the first signal is within the band of the first frequency band, and the excitation signal is within the guard band of the first frequency band. In another example, the first signal is within the guard band of the first frequency band, and the excitation signal is within the band of the first frequency band. In yet another example, the first signal is within the band of the first frequency band, and the excitation signal is within the band of the first frequency band.

[0094] It should be noted that, in the above cases 1 and 2, the first area is the in-band of the frequency band, and the second area is the guard band of the frequency band.

[0095] The first reference point in the above cases 1 to 2 is any one of the following: the edge frequency point within the first frequency band, the fixed frequency point within the first frequency band, the middle frequency point of the protection band of the first frequency band, the edge frequency point of the protection band of the first frequency band, the frequency point located in the first frequency band determined based on signaling, and the first signal / second signal / excitation signal located in the first frequency band.

[0096] The second reference point in the above cases 1 to 2 is any one of the following: the edge frequency point within the second frequency band, the fixed frequency point within the second frequency band, the middle frequency point of the protection band of the second frequency band, the edge frequency point of the protection band of the second frequency band, the frequency point located in the second frequency band determined based on signaling, and the first signal / second signal / excitation signal located in the second frequency band.

[0097] In some embodiments, the edge frequency point can be determined based on at least one of the following: the PRB with the largest physical resource block (PRB) index, the PRB with the smallest PRB index, the subcarrier with the largest subcarrier index within the PRB, and the subcarrier with the smallest subcarrier index within the PRB. The same applies to the following embodiments.

[0098] In some embodiments, for the above situation 2, the first signal and the excitation signal overlap in the time domain and / or frequency domain.

[0099] In some embodiments, receiving the excitation signal in the above S201 can be implemented as follows: determining the frequency band where the excitation signal is located and / or the frequency domain position within the band where the excitation signal is located in the first frequency band and the second frequency band according to the first signaling, and receiving the excitation signal at the frequency band and / or frequency domain position.

[0100] In some embodiments, the first signaling includes at least one of the following: high-layer signaling, and signaling carried in the first signal.

[0101] In some embodiments, the in-band frequency domain position may include a reference point and / or a frequency domain interval from the reference point. The reference point may be an in-band edge frequency point of the first / second frequency band, a fixed frequency point within the first / second frequency band, an intermediate frequency point of a guard band of the first / second frequency band, an edge frequency point of a guard band of the first / second frequency band, etc.

[0102] That is, the first node can determine whether the excitation signal is located in the first frequency band or the second frequency band, and the position in the frequency band based on the first signaling in the higher layer signaling or the first signaling carried in the received first signal. The position here can be determined by the frequency domain interval between the reference point.

[0103] For example, when the first signaling is 1, the frequency band is the second frequency band, and when the first signaling is 0, the frequency band is the first frequency band.

[0104] For another example, when the first signaling value is 00, the reference point is the in-band edge of the second frequency band (the frequency corresponding to the subcarrier with the largest PRB index and the largest subcarrier index within the PRB). When the first signaling value is 01, the reference point is the in-band edge of the second frequency band (the frequency corresponding to the subcarrier with the smallest PRB index and the largest subcarrier index within the PRB). When the first signaling value is 10, the reference point is the guard band edge of the second frequency band. When the first signaling value is 11, the reference point is frequency M, where the value of M is predetermined.

[0105] For another example, the first signaling may indicate the frequency domain interval between the excitation signal and the reference point, predefine 8-bit values, and use 3 bits of the first signal to represent the frequency domain interval between the excitation signal and the reference point.

[0106] For another example, the first signaling may also indicate the reference point and the frequency domain interval between the excitation signal and the reference point. For example, the second bit of the first signaling indicates the reference point, and the third bit indicates the frequency domain interval from the reference point.

[0107] In some embodiments, the receiving of the excitation signal in S201 may be implemented as: determining the frequency band of the excitation signal at least according to the frequency band of the second signal.

[0108] For example, since the second signal is in the uplink frequency band, the excitation signal is also in the uplink frequency band.

[0109] In some embodiments, the receiving of the excitation signal in S201 may be implemented as: determining that the frequency domain interval between the excitation signal and the second signal is a sixth interval.

[0110] For example, the frequency domain position corresponding to the second signal is PRB index 1, and the frequency domain position corresponding to the excitation signal and PRB index 1 are separated by the sixth interval.

[0111] In some embodiments, the receiving of the excitation signal in S201 may be implemented as: determining that the frequency domain interval between the excitation signal and the first reference point / the second reference point is less than a seventh interval.

[0112] The sixth interval and the seventh interval are respectively determined according to at least one of the following: a fixed value, a preset value, the first node type, the way the first node obtains energy, the coverage capability of the first node, the type of area where the first signal is located, the type of area where the second signal is located, the first frequency band position, the second frequency band position, and the transmission method of the second signal.

[0113] In some embodiments, the receiving of the excitation signal in S201 may be implemented as: determining that the excitation signal corresponds to one or more frequency domain positions.

[0114] That is, the excitation signal can be sent at multiple frequency domain locations.

[0115] For example, there are four frequency domain positions, including: the first frequency domain position, the second frequency domain position, the third frequency domain position and the fourth frequency domain position. Then, within the first time unit, the excitation signal can be sent at the first frequency domain position; within the second time unit, the excitation signal can be sent at the second frequency domain position; within the third time unit, the excitation signal can be sent at the third frequency domain position; within the fourth time unit, the excitation signal can be sent at the fourth frequency domain position, and so on.

[0116] In some embodiments, the first signal and the excitation signal may come from different devices. That is, the above S201 may be implemented as: receiving the first signal sent by the second node; and receiving the excitation signal sent by the second node or the third node.

[0117] For example, the first node may receive a first signal sent by the second node in a first frequency band and receive an excitation signal sent by the third node in a second frequency band. Then, the second node may send a second signal to the second node in the second frequency band.

[0118] For another example, the first node may receive a first signal sent by the second node in the first frequency band, and receive an excitation signal sent by the third node in the first frequency band. Then, the second node may send a second signal to the second node in the second frequency band.

[0119] For another example, the first node may receive a first signal sent by the second node in the first frequency band, and receive an excitation signal sent by the third node in the first frequency band. Then, the second node may send a second signal to the second node in the first frequency band.

[0120] In some embodiments, the first node further obtains second signaling, where the second signaling is used to indicate at least one of the following: device type, device capability, coverage capability, frequency domain location corresponding to the second signal, second signal transmission mode, whether power amplification is performed, whether power amplification is performed, modulation mode, and coding mode.

[0121] In some embodiments, the second signaling is carried in the frame header of the first signal, the control field of the first signal, the data field of the first signal, the medium access control (MAC) control element (CE) or the radio resource control (RRC) signaling. The frame header is the starting part of the frame, which is used to identify the beginning of a frame or the beginning of the data field. It usually contains some specific identifiers or synchronization signals to help the receiving end identify and lock the starting position of the frame. The control field is used to transmit control information, such as addresses, control commands, etc. The content of the control field is usually specified by the communication protocol and is used to implement functions such as connection establishment, data transmission control, and flow control. The data field is used to transmit actual data, that is, the information that the user needs to send.

[0122] For example, if the second signaling indicates the device type and is carried in the frame header of the first signal, there are three types of devices: device A, device B, and device C. When the second signaling value is 00, the device type is device A; when the second signaling value is 01, the device type is device B; and when the second signaling value is 10, the device type is device C. If the second node sends a first signal to a device of device type A, the second signaling value is 00, and the second signaling value is carried in the frame header of the first signal.

[0123] If the first node whose device type is device A receives the first signal and parses the second signaling obtained at the first signal frame header as 00, the first node determines that the first signal is sent to device A, and the first node continues to receive the first signal subsequently sent by the second node.

[0124] If the first node whose device type is device B receives the first signal and parses the second signaling obtained at the first signal frame header as 00, the first node determines that the first signal is sent to device A, and the first node no longer receives the first signal subsequently sent by the second node.

[0125] For example, if the second signaling indicates device capabilities and is carried in the control field of the first signal, there are two device capabilities: capability 1 represents passive capabilities, and capability 2 represents capabilities other than passive capabilities. Assume the second signaling is 2 bits, with the first bit representing capability 1 and the second bit representing capability 2. If the second node sends the first signal, and the first signal is sent to a device with capability 1, then the second signaling bit is 10, and the second signaling is carried in the control field of the first signal.

[0126] If the first node whose device capability is capability 1 receives the first signal and the second signaling parsed at the first signal control field is 10, the first node determines that the first signal is sent to the device whose device capability is capability 1, and the first node continues to receive the first signal subsequently sent by the second node.

[0127] If the first node whose device capability is capability 2 receives the first signal and the second signaling parsed at the first signal control field is 10, the first node determines that the first signal is sent to the device whose device capability is capability 1, and the first node no longer receives the first signal subsequently sent by the second node.

[0128] For example, if the second signaling indicates device coverage and is carried in the data field of the first signal, assuming there are two types of device coverage: coverage 1 for normal coverage and coverage 2 for extended coverage. Assume the second signaling is 2 bits, with the first bit representing coverage 1 and the second bit representing coverage 2. If the second node sends the first signal, which is sent to a device that achieves normal coverage, then the second signaling is 10, and the second signaling is carried in the data field of the first signal.

[0129] If the first node with device coverage of coverage 1 receives the first signal and interprets the second signaling as 10 in the first signal data field, the first node determines that the first signal is sent to the device that achieves normal coverage, and the first node continues to receive the first signal subsequently sent by the second node.

[0130] If the first node with device coverage of coverage 2 receives the first signal and interprets the second signaling as 10 in the first signal data field, the first node determines that the first signal is sent to the device that achieves normal coverage, and the first node no longer receives the first signal subsequently sent by the second node.

[0131] In some embodiments, the first signaling and the second signaling may be the same signaling, that is, the signaling may indicate the type / capability / coverage of the device and the frequency domain location at the same time.

[0132] Example 1: Assume that the frequency domain position includes the frequency band, which is indicated by 1 bit. When it is 1, the frequency band is the FDD uplink band, and when it is 0, it is the FDD downlink band. The device type is indicated by 3 bits, and each bit corresponds to a device type.

[0133] For example, the signaling is composed of the following: the first three digits represent all device types, and the last three digits represent the frequency band, or the first three digits represent the frequency band, and the last three digits represent all device types. For example, the signaling is 100100, and the first bit of the first three bits is 1, indicating device A, and the first bit of the last three bits is 1, indicating that the frequency band of device A is the FDD uplink band.

[0134] For another example, the signaling consists of: device type i and the frequency band where device type i is located. For example, if the signaling is 110000, it means that the frequency band where device A is located is the FDD uplink frequency band; i = all device types.

[0135] Example 2: Assume that the frequency domain position includes the frequency domain interval between the reference point, which is indicated by 3 bits, and the bit values ​​correspond to the 8 pre-defined frequency domain interval values; the device type is indicated by 2 bits, 10 indicates device type A, 01 indicates device type B, and 11 indicates device type C.

[0136] For example, the signaling consists of the following: the first two digits represent the device type, and the last three digits represent the frequency domain interval from the reference point; or the first three digits represent the frequency domain interval from the reference point, and the last two digits represent the device type. For example, if the signaling is 10111, it means that the frequency domain interval between the location of the excitation signal received by device type A and the reference point is 8.

[0137] In some embodiments, the transmission power of the excitation signal or the first signal is determined based on at least one of the following: a preset value, a configuration value based on signaling, a device type of the first node, the coverage capability of the first node, the receiver type of the first node, and the strength of the received second signal. The node transmitting the excitation signal or the first signal may determine the transmission power in advance based on the configuration of the base station or by obtaining relevant information about the first node, and transmit the excitation signal or the first signal to the first node at the power.

[0138] In some embodiments, the first node includes a first sub-node and a second sub-node. When the first node sends the second signal, the first sub-node and the second sub-node may send the second signal separately.

[0139] The second signal sent by the first subnode is a backscattered signal corresponding to the excitation signal, and the second signal sent by the second subnode is one of the following: a backscattered signal corresponding to the excitation signal, and an autonomously generated signal.

[0140] For example, the second node receives the second signal sent by the first device in the second frequency band, wherein the frequency domain position of the second signal of the first subnode and the frequency domain position of the second signal of the second subnode are the same.

[0141] For example, the second node receives the second signal sent by the first device in the second frequency band, wherein the frequency domain position of the second signal of the first subnode and the frequency domain position of the second signal of the second subnode are both within the second frequency band.

[0142] For example, the second node receives the second signal sent by the first device in the second frequency band, wherein the second signal of the first subnode is located in the guard band of the second frequency band, and the second signal of the second subnode is located at the in-band edge of the second frequency band.

[0143] For example, the second node receives the second signal sent by the first device in the second frequency band, wherein the second signal of the first sub-node is located at the in-band edge of the second frequency band, and the second signal of the second sub-device is located in the guard band of the second frequency band.

[0144] For example, the second node receives the second signal sent by the first device in the second frequency band. Assuming that the second node sends the excitation signal in the first frequency band, the second signal of the first subnode is in the first frequency band, and the second signal of the second subnode is in the second frequency band.

[0145] In some embodiments, the sending of the second signal in S202 may be configured by at least one of the following:

[0146] When the second signal and the excitation signal are in the same frequency band, one or more frequency domain positions corresponding to the second signal are lower than the frequency domain position corresponding to the excitation signal; for example, assuming that the second signal corresponds to two frequency domain positions, that is, the first time unit corresponds to the first frequency domain position, and the second time unit corresponds to the second frequency domain position, then the first frequency domain position and the second frequency domain position are both lower than the frequency domain position where the excitation signal is located;

[0147] When the second signal and the excitation signal are in the same frequency band, one or more frequency domain positions corresponding to the second signal are higher than the frequency domain position corresponding to the excitation signal;

[0148] When the second signal and the excitation signal are in the same frequency band, the one or more frequency domain positions corresponding to the second signal do not include the frequency domain position corresponding to the excitation signal; for example, assuming that the second signal corresponds to two frequency domain positions, that is, the first time unit corresponds to the first frequency domain position, and the second time unit corresponds to the second frequency domain position, then the first frequency domain position and the second frequency domain position are not the frequency domain positions where the excitation signal is located;

[0149] The number of frequency domain positions corresponding to the second signal in the guard band of the frequency band is less than the number of frequency domain positions corresponding to the second signal in the frequency band; for example, assuming that the number of frequency domain positions corresponding to the second signal in the guard band is k1 and the number of frequency domain positions corresponding to the second signal in the frequency band is k2, then the frequency domain positions corresponding to the second signal in the frequency band k2>k1;

[0150] When the second signal and the excitation signal are in the same frequency band, the one or more frequency domain positions corresponding to the second signal are determined at least based on the one or more frequency domain positions corresponding to the excitation signal; for example, assuming that the excitation signal corresponds to a first frequency domain position in a first time unit and corresponds to a second frequency domain position in a second time unit, then the frequency domain position corresponding to the corresponding second signal in the first time unit is determined at least based on the first frequency domain position, and the frequency domain position corresponding to the second time unit is determined at least based on the second frequency domain position;

[0151] Determine a frequency domain position of the second signal at least according to the cell index;

[0152] The frequency domain position of the second signal is determined at least according to the signaling.

[0153] In some embodiments, the sending of the second signal in S202 may have at least one of the following characteristics:

[0154] The frequency band of the second signal is the same as the frequency band of the excitation signal;

[0155] The frequency domain position corresponding to the second signal is the same as the frequency domain position corresponding to the excitation signal;

[0156] The frequency band of the second signal is a second frequency band;

[0157] The frequency domain position corresponding to the second signal is the same as the frequency domain position corresponding to the backscattered signal corresponding to the excitation signal;

[0158] The time domain position corresponding to the second signal is determined at least according to the time domain position of the first signal;

[0159] When the first signal and the second signal are in the TDD frequency band, the uplink and downlink configuration corresponding to the TDD is determined at least based on the transmission of the first signal and the second signal; for example, if the first signal needs to be sent at a first time domain position and the second signal needs to be sent at a second time domain position, then the corresponding TDD uplink and downlink configuration is configured such that the first time domain position is always downlink and the second time domain position is always uplink / flexible subframe;

[0160] The frequency band of the second signal is the same as the frequency band of the first signal.

[0161] In some embodiments, the second signal is a signal actively generated by the first node (or a signal generated internally by the first node).

[0162] In some embodiments, the first node determines the first parameter corresponding to the second signal based at least on the first parameter corresponding to the first signal.

[0163] The first parameter includes at least one of the following: symbol length, subcarrier spacing, cyclic prefix, time domain length, and number of subcarriers.

[0164] For example, assuming that the symbol length of the first signal is L1, the symbol length of the second signal is L1 / N, or L1*N.

[0165] For example, assuming that the subcarrier spacing of the first signal is 15 kHz, the symbol length of the second signal is 15*N kHz.

[0166] For example, assuming that the time domain length of the first signal transmission is h milliseconds, the time domain length of the second signal transmission is h+N.

[0167] In some embodiments, the frequency domain position of the first signal, the second signal, or the excitation signal is located in any of the following:

[0168] The first n PRBs of the band;

[0169] The last n PRBs of the band;

[0170] n PRBs in the guard band immediately adjacent to the first PRB in the frequency band;

[0171] n PRBs in the guard band immediately adjacent to the last PRB in the frequency band;

[0172] There are n PRBs, where the n PRBs include n1 PRBs in a guard band of a frequency band and n2 PRBs in an adjacent frequency band, where n, n1, and n2 are positive integers.

[0173] For example, as shown in Figure 4, the first signal is located in the first n PRBs of the first frequency band (near the lower edge of the first frequency band in the figure). For another example, as shown in Figure 5, the excitation signal is located in the last n PRBs of the second frequency band (near the upper edge of the second frequency band in the figure). For another example, as shown in Figure 4, the excitation signal is located in the guard band adjacent to the last PRB in the frequency band. For another example, as shown in Figure 5, the first signal is located in the guard band adjacent to the first PRB in the frequency band. For another example, as shown in Figure 11, the first signal corresponds to 5 PRBs, the first part of the first signal (corresponding to 1 PRB) is located in the guard band of the first frequency band, and the second part of the first signal (corresponding to 4 PRBs) is located in the band of the second frequency band.

[0174] Figure 12 is a flow chart of another signal transmission method provided by an embodiment of the present disclosure. Exemplarily, the signal transmission method provided by the present disclosure can be applied to the network architecture shown in Figure 1, and further, can be applied to the base station in Figure 1.

[0175] As shown in FIG. 12 , the signal transmission method provided by the present disclosure may include the following S1201 - S1202 .

[0176] S1201. Send a first signal and / or an excitation signal to a first node.

[0177] S1202: Receive a second signal sent by the first node in response to the first signal and / or the excitation signal.

[0178] The second node may be a base station, a terminal, or a relay device.

[0179] In some embodiments, the first node may receive the first signal and the excitation signal sent by the second node, or may receive the first signal sent by the second node and the excitation signal sent by the third node, wherein the second node and the third node are different devices.

[0180] Case 3 (corresponding to Case 1 on the first node side)

[0181] In some embodiments, the first signal is in a first frequency band and the second signal is in a second frequency band.

[0182] In one implementation, the relationship between the first signal and the second signal satisfies at least one of the following:

[0183] The first signal is located in the first region or the second region of the first frequency band;

[0184] The frequency domain interval between the first signal and the first reference point is smaller than the first interval;

[0185] The second signal is located in the first region or the second region of the second frequency band;

[0186] The frequency domain interval between the second signal and the second reference point is smaller than the second interval;

[0187] The first interval and the second interval are respectively determined according to one of the following: a fixed value, a pre-set value, the first node type, the way the first node obtains energy, the coverage capability of the first node, the type of area where the first signal is located, the type of area where the second signal is located, the first frequency band position, the second frequency band position, and the transmission method of the second signal.

[0188] Situation 3-1

[0189] In one implementation, the excitation signal is also located in the second frequency band, and the relationship between the excitation signal and the second signal satisfies at least one of the following:

[0190] The excitation signal is located in the first region or the second region of the second frequency band;

[0191] The second signal is located in the first region or the second region of the second frequency band.

[0192] That is, in one example, as shown in FIG7 , the second signal is within the guard band of the second frequency band, and the excitation signal is within the guard band of the second frequency band. In another example, as shown in FIG8 , the second signal is within the band of the second frequency band, and the excitation signal is within the guard band of the second frequency band. In another example, as shown in FIG9 , the second signal is within the guard band of the second frequency band, and the excitation signal is within the band of the second frequency band. In another example, as shown in FIG10 , the second signal is within the band of the second frequency band, and the excitation signal is within the band of the second frequency band.

[0193] Situation 3-2

[0194] In one implementation, the excitation signal is in the first frequency band, and the relationship between the excitation signal and the first signal satisfies at least one of the following:

[0195] The excitation signal is located in the first region or the second region of the first frequency band;

[0196] The first signal is located in the first region or the second region of the first frequency band;

[0197] The bandwidth of the excitation signal is M times the bandwidth of the first signal, where M is a positive number.

[0198] That is, in one example, the first signal is within the guard band of the first frequency band, and the excitation signal is within the guard band of the first frequency band. In another example, the first signal is within the band of the first frequency band, and the excitation signal is within the guard band of the first frequency band. In another example, the first signal is within the guard band of the first frequency band, and the excitation signal is within the band of the first frequency band. In yet another example, the first signal is within the band of the first frequency band, and the excitation signal is within the band of the first frequency band.

[0199] Case 4 (corresponding to Case 2 on the first node side)

[0200] In some embodiments, the first signal and the second signal are in a first frequency band.

[0201] In one implementation, the relationship between the first signal and the second signal satisfies at least one of the following:

[0202] The first signal is located in the first region or the second region of the first frequency band;

[0203] The second signal is located in the first region or the second region of the first frequency band;

[0204] The frequency domain interval between the first signal and the second reference point is smaller than the third interval;

[0205] The frequency domain interval between the second signal and the first reference point is smaller than a fourth interval;

[0206] The frequency domain interval between the first signal and the second signal is smaller than the fifth interval.

[0207] The third interval, the fourth interval and the fifth interval are respectively determined according to at least one of the following: a fixed value, a preset value, the first node type, the way the first node obtains energy, the coverage capability of the first node, the type of area where the first signal is located, the type of area where the second signal is located, the first frequency band position, the second frequency band position, and the transmission method of the second signal.

[0208] Situation 4-1

[0209] In one implementation, the excitation signal is also in the first frequency band, and the relationship between the excitation signal and the second signal satisfies at least one of the following:

[0210] The excitation signal is located in the first region or the second region of the first frequency band;

[0211] The second signal is located in the first region or the second region of the first frequency band;

[0212] The frequency domain interval between the excitation signal and the second signal is a sixth interval.

[0213] That is, in one example, the second signal is within the guard band of the first frequency band, and the excitation signal is within the guard band of the first frequency band. In another example, the second signal is within the band of the first frequency band, and the excitation signal is within the guard band of the first frequency band. In another example, the second signal is within the guard band of the first frequency band, and the excitation signal is within the band of the first frequency band. In yet another example, the second signal is within the band of the first frequency band, and the excitation signal is within the band of the first frequency band.

[0214] Situation 4-2

[0215] In one implementation, the excitation signal is also in the first frequency band, and the relationship between the excitation signal and the first signal satisfies at least one of the following:

[0216] The excitation signal is located in the first region or the second region of the first frequency band;

[0217] The first signal is located in the first region or the second region of the first frequency band;

[0218] The bandwidth of the excitation signal is M times the bandwidth of the first signal, where M is a positive number.

[0219] That is, in one example, the first signal is within the guard band of the first frequency band, and the excitation signal is within the guard band of the first frequency band. In another example, the first signal is within the band of the first frequency band, and the excitation signal is within the guard band of the first frequency band. In another example, the first signal is within the guard band of the first frequency band, and the excitation signal is within the band of the first frequency band. In yet another example, the first signal is within the band of the first frequency band, and the excitation signal is within the band of the first frequency band.

[0220] It should be noted that, in the above cases 3 and 4, the first area is the in-band of the frequency band, and the second area is the guard band of the frequency band.

[0221] The first reference point in the above cases 3 to 4 is any one of the following: the edge frequency point within the first frequency band, the fixed frequency point within the first frequency band, the middle frequency point of the protection band of the first frequency band, the edge frequency point of the protection band of the first frequency band, the frequency point located in the first frequency band determined based on signaling, and the first signal / second signal / excitation signal located in the first frequency band.

[0222] The second reference point in the above cases 3 to 4 is any one of the following: the edge frequency point within the second frequency band, the fixed frequency point within the second frequency band, the middle frequency point of the protection band of the second frequency band, the edge frequency point of the protection band of the second frequency band, the frequency point located in the second frequency band determined based on signaling, and the first signal / second signal / excitation signal located in the second frequency band.

[0223] In some embodiments, the edge frequency point can be determined based on at least one of the following: the PRB with the largest physical resource block (PRB) index, the PRB with the smallest PRB index, the subcarrier with the largest subcarrier index within the PRB, and the subcarrier with the smallest subcarrier index within the PRB.

[0224] In some embodiments, for the above situation 2, the first signal and the excitation signal overlap in the time domain and / or frequency domain.

[0225] In some embodiments, the above-mentioned second node sends the excitation signal, which can be implemented as: determining the frequency band where the excitation signal is located and / or the frequency domain position within the band where the excitation signal is located in the first frequency band and the second frequency band according to the first signaling, and sending the excitation signal at the frequency band and / or frequency domain position.

[0226] In some embodiments, the first signaling includes at least one of the following: high-layer signaling, and signaling carried in the first signal.

[0227] In some embodiments, the second node sending the excitation signal may be implemented by: determining the frequency band of the excitation signal at least according to the frequency band of the second signal.

[0228] In some embodiments, the second node sending the excitation signal may be implemented as follows: a frequency domain interval between the excitation signal and the second signal is a sixth interval.

[0229] In some embodiments, the second node sending the excitation signal may be implemented as follows: a frequency domain interval between the excitation signal and the first reference point / the second reference point is smaller than the seventh interval.

[0230] The sixth interval and the seventh interval are respectively determined according to at least one of the following: a fixed value, a preset value, the first node type, the way the first node obtains energy, the coverage capability of the first node, the type of area where the first signal is located, the type of area where the second signal is located, the first frequency band position, the second frequency band position, and the transmission method of the second signal.

[0231] In some embodiments, the second node sending the excitation signal may be implemented as follows: the excitation signal corresponds to one or more frequency domain positions.

[0232] That is, the second node may send the excitation signal at multiple frequency domain positions.

[0233] In some embodiments, the second signaling obtained by the first node is used to indicate at least one of the following: device type, device capability, coverage capability, frequency domain position corresponding to the second signal, second signal transmission method, whether power amplification is performed, whether power amplification is performed, modulation method, and coding method.

[0234] In some embodiments, the second signaling is carried in a frame header of the first signal, a control field of the first signal, a data field of the first signal, a MAC control element, or RRC signaling.

[0235] In some embodiments, the transmission power of the excitation signal or the first signal is determined based on at least one of the following: a preset value, a configuration value based on signaling, a device type of the first node, a coverage capability of the first node, a receiver type of the first node, and a received second signal strength.

[0236] In some embodiments, the first node includes a first sub-node and a second sub-node. The receiving of the second signal in S1202 may be receiving the second signals sent by the first sub-node and the second sub-node respectively.

[0237] The second row signal sent by the first subnode is a backscattered signal corresponding to the excitation signal, and the second row signal sent by the second subnode is one of the following: a backscattered signal corresponding to the excitation signal, and an autonomously generated signal.

[0238] In some embodiments, the receiving of the second signal in S1202 may be configured by at least one of the following:

[0239] When the second signal and the excitation signal are in the same frequency band, one or more frequency domain positions corresponding to the second signal are lower than the frequency domain position corresponding to the excitation signal;

[0240] When the second signal and the excitation signal are in the same frequency band, one or more frequency domain positions corresponding to the second signal are higher than the frequency domain position corresponding to the excitation signal;

[0241] When the second signal and the excitation signal are in the same frequency band, the one or more frequency domain positions corresponding to the second signal do not include the frequency domain position corresponding to the excitation signal;

[0242] The number of frequency domain positions corresponding to the second signal in the guard band of the frequency band is less than the number of frequency domain positions corresponding to the second signal in the frequency band;

[0243] When the second signal and the excitation signal are in the same frequency band, the one or more frequency domain positions corresponding to the second signal are determined at least according to the one or more frequency domain positions corresponding to the excitation signal;

[0244] Determine a frequency domain position of the second signal at least according to the cell index;

[0245] determining a frequency domain position of the second signal at least according to the signaling;

[0246] The second signal is a backscattered signal corresponding to the excitation signal.

[0247] In some embodiments, the receiving of the second signal in S1202 may have at least one of the following characteristics:

[0248] The frequency band of the second signal is the same as the frequency band of the excitation signal;

[0249] The frequency domain position corresponding to the second signal is the same as the frequency domain position corresponding to the excitation signal;

[0250] The frequency band of the second signal is a second frequency band;

[0251] The frequency domain position corresponding to the second signal is the same as the frequency domain position corresponding to the backscattered signal corresponding to the excitation signal;

[0252] The time domain position corresponding to the second signal is determined at least according to the time domain position of the first signal;

[0253] When the first signal and the second signal are in the TDD frequency band, determining the uplink and downlink configuration corresponding to the TDD at least based on the transmission of the first signal and the second signal;

[0254] The frequency band of the second signal is the same as the frequency band of the first signal;

[0255] The second signal is a signal actively generated by the first node.

[0256] In some embodiments, the first node determines the first parameter corresponding to the second signal based at least on the first parameter corresponding to the first signal.

[0257] The first parameter includes at least one of the following: symbol length, subcarrier spacing, cyclic prefix, time domain length, and number of subcarriers.

[0258] In some embodiments, the frequency domain position of the first signal, the second signal, or the excitation signal is located in any one of the following:

[0259] The first n PRBs of the band;

[0260] The last n PRBs of the band;

[0261] n PRBs in the guard band immediately adjacent to the first PRB in the frequency band;

[0262] n PRBs in the guard band immediately adjacent to the last PRB in the frequency band;

[0263] There are n PRBs, where the n PRBs include n1 PRBs in a frequency band guard band and n2 PRBs in a band of an adjacent frequency band, where n, n1, and n2 are positive integers.

[0264] The signal transmission method provided by the embodiments of the present disclosure implements communication between two nodes by receiving a first signal and / or an excitation signal and sending a second signal based on the first signal and / or the excitation signal. The present disclosure combines Ambient IoT with an FDD / TDD system by configuring the distribution of the first signal, the second signal, and the excitation signal on the FDD system frequency band, or configuring the uplink and downlink configuration when the signal is in the TDD frequency band, thereby implementing transmission of Ambient IoT on the FDD / TDD system.

[0265] It is understandable that, in order to implement the above functions, the communication device (which may be the first node or the second node) includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily appreciate that, in conjunction with the algorithm steps of each example described in the embodiments of the present disclosure, the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software driven hardware manner depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present disclosure.

[0266] The embodiments of the present disclosure can divide the functional modules of the communication device according to the above-mentioned method embodiments. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one functional module. The above-mentioned integrated modules can be implemented in the form of hardware or software. It should be noted that the division of modules in the embodiments of the present disclosure is schematic and is only a logical functional division. In actual implementation, there may be other division methods. The following is an example of dividing each functional module corresponding to each function.

[0267] FIG13 is a schematic diagram of the structure of a communication device provided in an embodiment of the present disclosure, which can execute the signal transmission method provided in the above method embodiment. As shown in FIG13 , the communication device includes a receiving module 1301 and a sending module 1302 .

[0268] The receiving module 1301 is configured to receive a first signal and / or an excitation signal;

[0269] The sending module 1302 is configured to send a second signal based on the first signal and / or the excitation signal.

[0270] In some embodiments, the first signal is in a first frequency band and the second signal is in a second frequency band.

[0271] In some embodiments, the relationship between the first signal and the second signal satisfies at least one of the following:

[0272] The first signal is located in the first region or the second region of the first frequency band;

[0273] The frequency domain interval between the first signal and the first reference point is smaller than the first interval;

[0274] The second signal is located in the first region or the second region of the second frequency band;

[0275] The frequency domain interval between the second signal and the second reference point is smaller than the second interval;

[0276] The first interval and the second interval are respectively determined according to one of the following: a fixed value, a pre-set value, the first node type, the way the first node obtains energy, the coverage capability of the first node, the type of area where the first signal is located, the type of area where the second signal is located, the first frequency band position, the second frequency band position, and the transmission method based on the second signal.

[0277] In some embodiments, the first signal and the second signal are in a first frequency band.

[0278] In some embodiments, the relationship between the first signal and the second signal satisfies at least one of the following:

[0279] The first signal is located in the first region or the second region of the first frequency band;

[0280] The second signal is located in the first region or the second region of the first frequency band;

[0281] The frequency domain interval between the first signal and the second reference point is smaller than the third interval;

[0282] The frequency domain interval between the second signal and the first reference point is smaller than the fourth interval;

[0283] The frequency domain interval between the first signal and the second signal is smaller than the fifth interval.

[0284] The third interval, the fourth interval and the fifth interval are respectively determined according to at least one of the following: a fixed value, a pre-set value, the first node type, the way the first node obtains energy, the coverage capability of the first node, the type of area where the first signal is located, the type of area where the second signal is located, the first frequency band position, the second frequency band position, and the transmission method based on the second signal.

[0285] In some embodiments, the first region is an in-band of the frequency band, and the second region is a guard band of the frequency band.

[0286] In some embodiments, receiving an excitation signal further includes at least one of the following:

[0287] Determining, in the first frequency band and the second frequency band according to the first signaling, a frequency band where the excitation signal is located and / or a frequency domain position where the excitation signal is located, and receiving the excitation signal at the frequency band and / or the frequency domain position;

[0288] determining the frequency band of the excitation signal at least according to the frequency band of the second signal;

[0289] Determine a frequency domain interval between the excitation signal and the second signal as a sixth interval;

[0290] Determining that a frequency domain interval between the excitation signal and the first reference point / the second reference point is less than a seventh interval;

[0291] Determine one or more frequency domain locations corresponding to the excitation signal.

[0292] The sixth interval and the seventh interval are respectively determined according to at least one of the following: a fixed value, a pre-set value, the first node type, the way the first node obtains energy, the coverage capability of the first node, the type of area where the excitation signal is located, the type of area where the second signal is located, the first frequency band position, the second frequency band position, and the transmission method based on the second signal.

[0293] In some embodiments, the first signaling includes at least one of the following: high-layer signaling, and signaling carried in the first signal.

[0294] In some embodiments, the first reference point is any one of the following: an edge frequency point within the first frequency band, a fixed frequency point within the first frequency band, an intermediate frequency point of the protection band of the first frequency band, an edge frequency point of the protection band of the first frequency band, a frequency point located in the first frequency band determined based on signaling, and a first signal / second signal / excitation signal located in the first frequency band.

[0295] In some embodiments, the second reference point is any one of the following: an edge frequency point within the second frequency band, a fixed frequency point within the second frequency band, an intermediate frequency point of the protection band of the second frequency band, an edge frequency point of the protection band of the second frequency band, a frequency point located in the second frequency band determined based on signaling, or a first signal / second signal / excitation signal located in the second frequency band.

[0296] In some embodiments, the bandwidth of the first signal is M times the bandwidth of the excitation signal, where M is an integer greater than zero.

[0297] In some embodiments, the first signal and the excitation signal overlap in the time domain and / or the frequency domain.

[0298] In some embodiments, the receiving module 1301 is further configured to receive a first signal sent by the second node; the receiving module 1301 is further configured to receive an excitation signal sent by the second node or the third node.

[0299] In some embodiments, the receiving module 1301 is also used to obtain a second signaling, where the second signaling is used to indicate at least one of the following: device type, device capability, coverage capability, frequency domain position corresponding to the second signal, second signal transmission method, whether power amplification is performed, whether power amplification is performed, modulation method, and coding method.

[0300] In some embodiments, the second signaling is carried in a frame header of the first signal, a control field of the first signal, a data field of the first signal, a MAC control element, or RRC signaling.

[0301] In some embodiments, the transmission power of the excitation signal or the first signal is determined based on at least one of the following: a preset value, a configuration value based on signaling, a device type of the first node, a coverage capability of the first node, a receiver type of the first node, and a received second signal strength.

[0302] In some embodiments, based on the first signal and / or the excitation signal, sending the second signal further includes at least one of the following:

[0303] When the second signal and the excitation signal are in the same frequency band, one or more frequency domain positions corresponding to the second signal are lower than the frequency domain position corresponding to the excitation signal;

[0304] When the second signal and the excitation signal are in the same frequency band, one or more frequency domain positions corresponding to the second signal are higher than the frequency domain position corresponding to the excitation signal;

[0305] When the second signal and the excitation signal are in the same frequency band, the one or more frequency domain positions corresponding to the second signal do not include the frequency domain position corresponding to the excitation signal;

[0306] The number of frequency domain positions corresponding to the second signal in the guard band of the frequency band is less than the number of frequency domain positions corresponding to the second signal in the frequency band;

[0307] When the second signal and the excitation signal are in the same frequency band, the one or more frequency domain positions corresponding to the second signal are determined at least according to the one or more frequency domain positions corresponding to the excitation signal;

[0308] Determine a frequency domain position of the second signal at least according to the cell index;

[0309] determining a frequency domain position of the second signal at least according to the signaling;

[0310] The second signal is a backscattered signal corresponding to the excitation signal.

[0311] In some embodiments, based on the first signal and / or the excitation signal, sending the second signal further includes at least one of the following:

[0312] The frequency band of the second signal is the same as the frequency band of the excitation signal;

[0313] The frequency domain position corresponding to the second signal is the same as the frequency domain position corresponding to the excitation signal;

[0314] The frequency band where the second signal is located is the second frequency band;

[0315] The frequency domain position corresponding to the second signal is the same as the frequency domain position corresponding to the backscattered signal corresponding to the excitation signal;

[0316] The time domain position corresponding to the second signal is determined at least according to the time domain position of the first signal;

[0317] When the first signal and the second signal are in the TDD frequency band, determining the uplink and downlink configuration corresponding to the TDD based at least on the transmission of the first signal and the second signal;

[0318] The frequency band of the second signal is the same as the frequency band of the first signal;

[0319] The second signal is a signal actively generated by the first node.

[0320] In some embodiments, the relationship between the first signal and the second signal satisfies the following: the first parameter corresponding to the second signal is determined at least based on the first parameter corresponding to the first signal, wherein the first parameter includes at least one of the following: symbol length, subcarrier spacing, cyclic prefix, time domain length, and number of subcarriers.

[0321] In some embodiments, the frequency domain position of the first signal, the second signal, or the excitation signal is located in any one of the following:

[0322] The first n PRBs of the band;

[0323] The last n PRBs of the band;

[0324] n PRBs in the guard band immediately adjacent to the first PRB in the frequency band;

[0325] n PRBs in the guard band immediately adjacent to the last PRB in the frequency band;

[0326] There are n PRBs, where the n PRBs include n1 PRBs in a guard band of a frequency band and n2 PRBs in an adjacent frequency band, where n, n1, and n2 are positive integers.

[0327] FIG14 is a schematic diagram of the structure of a communication device provided in an embodiment of the present disclosure, which can execute the signal transmission method provided in the above method embodiment. As shown in FIG14 , the communication device includes a sending module 1401 and a receiving module 1402 .

[0328] The sending module 1401 is configured to send a first signal and / or an excitation signal to the first node;

[0329] The receiving module 1402 is configured to receive a second signal sent by the first node in response to the first signal and / or the excitation signal.

[0330] In some embodiments, the first signal is in a first frequency band and the second signal is in a second frequency band.

[0331] In some embodiments, the first signal and the second signal are in a first frequency band.

[0332] In some embodiments, sending an excitation signal further includes at least one of the following:

[0333] Determine, in the first frequency band and the second frequency band according to the first signaling, a frequency band where the excitation signal is located and / or a frequency domain position where the excitation signal is located, and send the excitation signal at the frequency band and / or frequency domain position;

[0334] determining the frequency band of the excitation signal at least according to the frequency band of the second signal;

[0335] Determine a frequency domain interval between the excitation signal and the second signal as a sixth interval;

[0336] Determining that a frequency domain interval between the excitation signal and the first reference point / the second reference point is less than a seventh interval;

[0337] Determine one or more frequency domain locations corresponding to the excitation signal.

[0338] The sixth interval and the seventh interval are respectively determined according to at least one of the following: a fixed value, a pre-set value, the first node type, the way the first node obtains energy, the coverage capability of the first node, the type of area where the first signal is located, the type of area where the second signal is located, the first frequency band position, the second frequency band position, and the transmission method based on the second signal.

[0339] In some embodiments, the bandwidth of the first signal is M times the bandwidth of the excitation signal, where M is an integer greater than zero.

[0340] In some embodiments, the first signal and the excitation signal overlap in the time domain and / or the frequency domain.

[0341] In some embodiments, the second signaling obtained by the first node is used to indicate at least one of the following: device type, device capability, coverage capability, frequency domain position corresponding to the second signal, second signal transmission method, whether power amplification is performed, whether power amplification is performed, modulation method, and coding method.

[0342] In some embodiments, the second signaling is carried in a frame header of the first signal, a control field of the first signal, a data field of the first signal, a MAC control element, or RRC signaling.

[0343] In some embodiments, the transmission power of the excitation signal or the first signal is determined based on at least one of the following: a preset value, a configuration value based on signaling, a device type of the first node, a coverage capability of the first node, a receiver type of the first node, and a received second signal strength.

[0344] In some embodiments, the second signal sent by the second node in response to the first signal and / or the stimulus signal further includes at least one of the following:

[0345] When the second signal and the excitation signal are in the same frequency band, one or more frequency domain positions corresponding to the second signal are lower than the frequency domain position corresponding to the excitation signal;

[0346] When the second signal and the excitation signal are in the same frequency band, one or more frequency domain positions corresponding to the second signal are higher than the frequency domain position corresponding to the excitation signal;

[0347] When the second signal and the excitation signal are in the same frequency band, the one or more frequency domain positions corresponding to the second signal do not include the frequency domain position corresponding to the excitation signal;

[0348] The number of frequency domain positions corresponding to the second signal in the guard band of the frequency band is less than the number of frequency domain positions corresponding to the second signal in the frequency band;

[0349] When the second signal and the excitation signal are in the same frequency band, the one or more frequency domain positions corresponding to the second signal are determined at least according to the one or more frequency domain positions corresponding to the excitation signal;

[0350] Determine a frequency domain position of the second signal at least according to the cell index;

[0351] determining a frequency domain position of the second signal at least according to the signaling;

[0352] The second signal is a backscattered signal corresponding to the excitation signal.

[0353] In some embodiments, the second signal sent by the second node in response to the first signal and / or the stimulus signal further includes at least one of the following:

[0354] The frequency band of the second signal is the same as the frequency band of the excitation signal;

[0355] The frequency domain position corresponding to the second signal is the same as the frequency domain position corresponding to the excitation signal;

[0356] The frequency band where the second signal is located is the second frequency band;

[0357] The frequency domain position corresponding to the second signal is the same as the frequency domain position corresponding to the backscattered signal corresponding to the excitation signal;

[0358] The time domain position corresponding to the second signal is determined at least according to the time domain position of the first signal;

[0359] When the first signal and the second signal are in the TDD frequency band, determining the uplink and downlink configuration corresponding to the TDD based at least on the transmission of the first signal and the second signal;

[0360] The second signal is a signal actively generated by the first node.

[0361] In some embodiments, the frequency domain position of the first signal, the second signal, or the excitation signal is located in any of the following:

[0362] The first n PRBs of the band;

[0363] The last n PRBs of the band;

[0364] n PRBs in the guard band immediately adjacent to the first PRB in the frequency band;

[0365] n PRBs in the guard band immediately adjacent to the last PRB in the frequency band;

[0366] There are n PRBs, where the n PRBs include n1 PRBs in a guard band of a frequency band and n2 PRBs in an adjacent system frequency band, and n, n1, and n2 are positive integers.

[0367] In the case of implementing the functions of the above-mentioned integrated modules in the form of hardware, the embodiments of the present disclosure provide another structure of the communication device involved in the above-mentioned embodiments. As shown in Figure 15, the communication device 150 includes: a memory 1501, a processor 1502, a communication interface 1503, and a bus 1504.

[0368] The memory 1501 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store dynamic information and instructions, an electrically erasable programmable read-only memory (EEPROM), a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0369] Processor 1502 may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of this disclosure. Processor 1502 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array, or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Processor 1502 may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of this disclosure. Processor 1502 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0370] The communication interface 1503 is used to connect to other devices via a communication network, such as Ethernet, wireless access network, or wireless local area network (WLAN).

[0371] In some embodiments, the memory 1501 may exist independently of the processor 1502 and may be connected to the processor 1502 via a bus 1504 to store instructions or program codes. When the processor 1502 calls and executes the instructions or program codes stored in the memory 1501, the signal transmission method provided in the embodiments of the present disclosure can be implemented.

[0372] In some embodiments, the memory 1501 may also be integrated with the processor 1502 .

[0373] Bus 1504 can be an Extended Industry Standard Architecture (EISA) bus, for example. Bus 1504 can be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, FIG15 shows bus 1504 using only a single bold line. This does not imply that there is only one bus or only one type of bus.

[0374] In some embodiments, the memory 1501 stores executable instructions. When the processor 1502 executes the executable instructions, the communication device executes the signal transmission method described in any of the above embodiments.

[0375] Some embodiments of the present disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium), which stores computer program instructions. When the computer program instructions are executed on a computer, the computer executes the signal transmission method described in any of the above embodiments.

[0376] Exemplarily, the above-mentioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes, etc.), optical disks (e.g., compact disks (CDs), digital versatile disks (DVDs), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memories (EPROMs), cards, sticks, or key drives, etc.). The various computer-readable storage media described in the present disclosure may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0377] An embodiment of the present disclosure provides a computer program product comprising instructions. When the computer program product is run on a computer, the computer is enabled to execute the signal transmission method described in any one of the above embodiments.

[0378] The above is only a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or replacements within the technical scope disclosed in the present disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A signal transmission method, applied to a first node, wherein: The method comprises: receiving a first signal and / or an excitation signal; Based on the first signal and / or the excitation signal, a second signal is sent.

2. The method according to claim 1, wherein The first signal is located in a first frequency band, and the second signal is located in a second frequency band.

3. The method according to claim 2, wherein: The relationship between the first signal and the second signal satisfies at least one of the following: The first signal is located in the first region or the second region of the first frequency band; The frequency domain interval between the first signal and the first reference point is smaller than the first interval; The second signal is located in the first region or the second region of the second frequency band; or The frequency domain interval between the second signal and the second reference point is smaller than the second interval; The first interval and the second interval are respectively determined according to one of the following: a fixed value, a pre-set value, the first node type, the way the first node obtains energy, the coverage capability of the first node, the type of area where the first signal is located, the type of area where the second signal is located, the first frequency band position, the second frequency band position, and the transmission method based on the second signal.

4. The method according to claim 1, wherein The first signal and the second signal are located in a first frequency band.

5. The method according to claim 4, wherein The relationship between the first signal and the second signal satisfies at least one of the following: The first signal is located in the first region or the second region of the first frequency band; The second signal is located in the first region or the second region of the first frequency band; The frequency domain interval between the first signal and the second reference point is smaller than the third interval; The frequency domain interval between the second signal and the first reference point is smaller than a fourth interval; or The frequency domain interval between the first signal and the second signal is smaller than the fifth interval; Among them, the third interval, the fourth interval and the fifth interval are respectively determined according to at least one of the following: a fixed value, a pre-set value, the first node type, the way the first node obtains energy, the coverage capability of the first node, the type of area where the first signal is located, the type of area where the second signal is located, the first frequency band position, the second frequency band position, and the transmission method based on the second signal.

6. The method according to claim 3 or 5, wherein: The first region is an in-band of a frequency band, and the second region is a guard band of the frequency band.

7. The method according to claim 1, wherein The receiving of the excitation signal further includes at least one of the following: Determining, in the first frequency band and the second frequency band according to the first signaling, a frequency band where the excitation signal is located and / or a frequency domain position where the excitation signal is located, and receiving the excitation signal at the frequency band and / or the frequency domain position; determining the frequency band of the excitation signal at least according to the frequency band of the second signal; Determine a frequency domain interval between the excitation signal and the second signal as a sixth interval; Determine that the frequency domain interval between the excitation signal and the first reference point / the second reference point is less than a seventh interval; or Determining one or more frequency domain positions corresponding to the excitation signal; Among them, the sixth interval and the seventh interval are respectively determined according to at least one of the following: a fixed value, a pre-set value, the first node type, the way the first node obtains energy, the coverage capability of the first node, the type of area where the excitation signal is located, the type of area where the second signal is located, the first frequency band position, the second frequency band position, and the transmission method based on the second signal.

8. The method according to claim 7, wherein: The first signaling includes at least one of the following: high-layer signaling, and signaling carried in the first signal.

9. The method according to claim 3, 5 or 7, wherein: The first reference point is any one of the following: an edge frequency point within the first frequency band, a fixed frequency point within the first frequency band, an intermediate frequency point of the protection band of the first frequency band, an edge frequency point of the protection band of the first frequency band, a frequency point located in the first frequency band determined based on signaling, or a first signal / second signal / excitation signal located in the first frequency band.

10. The method according to claim 3, 5 or 7, wherein: The second reference point is any one of the following: the edge frequency point within the second frequency band, the fixed frequency point within the second frequency band, the middle frequency point of the protection band of the second frequency band, the edge frequency point of the protection band of the second frequency band, the frequency point located in the second frequency band determined based on signaling, and the first signal / second signal / excitation signal located in the second frequency band.

11. The method according to claim 1, wherein The bandwidth of the first signal is M times the bandwidth of the excitation signal, where M is an integer greater than zero.

12. The method according to claim 1, wherein The first signal and the excitation signal overlap in the time domain and / or the frequency domain.

13. The method according to claim 1, wherein The receiving of the first signal and / or the excitation signal further includes: receiving the first signal sent by the second node; Receive the excitation signal sent by the second node or the third node.

14. The method according to claim 1, further comprising: Obtain a second signaling; the second signaling is used to indicate at least one of the following: device type, device capability, coverage capability, frequency domain position corresponding to the second signal, second signal transmission method, whether power amplification is performed, whether power amplification is performed, modulation method, and coding method.

15. The method according to claim 14, wherein The second signaling is carried in the frame header of the first signal, the control field of the first signal, the data field of the first signal, the medium access control MAC control element CE or the radio resource control RRC signaling.

16. The method according to claim 1, wherein The transmission power of the excitation signal or the first signal is determined according to at least one of the following: a preset value, a configuration value based on signaling, a device type of the first node, a coverage capability of the first node, a receiver type of the first node, and a received second signal strength.

17. The method according to claim 1, wherein The sending of the second signal based on the first signal and / or the excitation signal further includes at least one of the following: When the second signal and the excitation signal are in the same frequency band, one or more frequency domain positions corresponding to the second signal are lower than the frequency domain position corresponding to the excitation signal; When the second signal and the excitation signal are in the same frequency band, one or more frequency domain positions corresponding to the second signal are higher than the frequency domain position corresponding to the excitation signal; When the second signal and the excitation signal are in the same frequency band, the one or more frequency domain positions corresponding to the second signal do not include the frequency domain position corresponding to the excitation signal; The number of frequency domain positions corresponding to the second signal in the guard band of the frequency band is less than the number of frequency domain positions corresponding to the second signal in the frequency band; When the second signal and the excitation signal are in the same frequency band, the one or more frequency domain positions corresponding to the second signal are determined at least according to the one or more frequency domain positions corresponding to the excitation signal; Determine a frequency domain position of the second signal at least according to the cell index; or determining a frequency domain position of the second signal at least according to the signaling; The second signal is a backscattered signal corresponding to the excitation signal.

18. The method according to claim 1, wherein The sending of the second signal based on the first signal and / or the excitation signal further includes at least one of the following: The frequency band of the second signal is the same as the frequency band of the excitation signal; The frequency domain position corresponding to the second signal is the same as the frequency domain position corresponding to the excitation signal; The frequency band of the second signal is a second frequency band; The frequency domain position corresponding to the second signal is the same as the frequency domain position corresponding to the backscattered signal corresponding to the excitation signal; The time domain position corresponding to the second signal is determined at least according to the time domain position of the first signal; When the first signal and the second signal are in a time division duplex (TDD) frequency band, determining an uplink and downlink configuration corresponding to the TDD at least based on the transmission of the first signal and the second signal; or The frequency band of the second signal is the same as the frequency band of the first signal; The second signal is a signal actively generated by the first node.

19. The method according to claim 1, wherein The relationship between the first signal and the second signal satisfies the following: The first parameter corresponding to the second signal is determined at least based on the first parameter corresponding to the first signal, wherein the first parameter includes at least one of the following: symbol length, subcarrier spacing, cyclic prefix, time domain length, and number of subcarriers.

20. The method according to claim 1, wherein The frequency domain position of the first signal, the second signal, or the excitation signal is located in any one of the following: The first n PRBs of the band; The last n PRBs of the band; n PRBs in the guard band immediately adjacent to the first PRB in the frequency band; n PRBs in the guard band immediately adjacent to the last PRB in the frequency band; There are n PRBs, where the n PRBs include n1 PRBs in a guard band of a frequency band and n2 PRBs in an adjacent frequency band, where n, n1, and n2 are positive integers.

21. A signal transmission method, applied to a second node, wherein: The method comprises: Sending a first signal and / or an excitation signal to the first node; A second signal sent by the first node in response to the first signal and / or the stimulation signal is received.

22. The method according to claim 21, wherein The first signal is located in a first frequency band, and the second signal is located in a second frequency band.

23. The method according to claim 21, wherein The first signal and the second signal are located in a first frequency band.

24. The method according to claim 22, wherein The sending of the excitation signal further includes at least one of the following: Determine, in the first frequency band and the second frequency band according to the first signaling, a frequency band where the excitation signal is located and / or a frequency domain position where the excitation signal is located, and send the excitation signal in the frequency band and / or the frequency domain position; determining the frequency band of the excitation signal at least according to the frequency band of the second signal; Determine a frequency domain interval between the excitation signal and the second signal as a sixth interval; Determine that the frequency domain interval between the excitation signal and the first reference point / the second reference point is less than a seventh interval; or Determining one or more frequency domain positions corresponding to the excitation signal; Among them, the sixth interval and the seventh interval are respectively determined according to at least one of the following: a fixed value, a pre-set value, the first node type, the way the first node obtains energy, the coverage capability of the first node, the type of area where the first signal is located, the type of area where the second signal is located, the first frequency band position, the second frequency band position, and the transmission method based on the second signal.

25. The method according to claim 22, wherein The bandwidth of the first signal is M times the bandwidth of the excitation signal, where M is an integer greater than zero.

26. The method according to claim 22, wherein The first signal and the excitation signal overlap in the time domain and / or the frequency domain.

27. According to the method according to claim 21, the second signaling obtained by the first node is used to indicate at least one of the following: device type, device capability, coverage capability, frequency domain position corresponding to the second signal, second signal transmission method, whether power amplification is performed, whether power amplification is performed, modulation method, and coding method.

28. The method according to claim 27, wherein The second signaling is carried in the frame header of the first signal, the control field of the first signal, the data field of the first signal, the medium access control MAC control element CE or the radio resource control RRC signaling.

29. The method according to claim 21, wherein The transmission power of the excitation signal or the first signal is determined according to at least one of the following: a preset value, a configuration value based on signaling, a device type of the first node, a coverage capability of the first node, a receiver type of the first node, and a received second signal strength.

30. The method according to claim 21, wherein The second signal sent by the second node in response to the first signal and / or the stimulation signal further includes at least one of the following: When the second signal and the excitation signal are in the same frequency band, one or more frequency domain positions corresponding to the second signal are lower than the frequency domain position corresponding to the excitation signal; When the second signal and the excitation signal are in the same frequency band, one or more frequency domain positions corresponding to the second signal are higher than the frequency domain position corresponding to the excitation signal; When the second signal and the excitation signal are in the same frequency band, the one or more frequency domain positions corresponding to the second signal do not include the frequency domain position corresponding to the excitation signal; The number of frequency domain positions corresponding to the second signal in the guard band of the frequency band is less than the number of frequency domain positions corresponding to the second signal in the frequency band; When the second signal and the excitation signal are in the same frequency band, the one or more frequency domain positions corresponding to the second signal are determined at least according to the one or more frequency domain positions corresponding to the excitation signal; Determine a frequency domain position of the second signal at least according to the cell index; or determining a frequency domain position of the second signal at least according to the signaling; The second signal is a backscattered signal corresponding to the excitation signal.

31. The method according to claim 21, wherein The second signal sent by the second node in response to the first signal and / or the stimulation signal further includes at least one of the following: The frequency band of the second signal is the same as the frequency band of the excitation signal; The frequency domain position corresponding to the second signal is the same as the frequency domain position corresponding to the excitation signal; The frequency band of the second signal is a second frequency band; The frequency domain position corresponding to the second signal is the same as the frequency domain position corresponding to the backscattered signal corresponding to the excitation signal; The time domain position corresponding to the second signal is determined at least according to the time domain position of the first signal; When the first signal and the second signal are in a time division duplex (TDD) frequency band, determining an uplink and downlink configuration corresponding to the TDD at least based on the transmission of the first signal and the second signal; or The frequency band of the second signal is the same as the frequency band of the first signal; The second signal is a signal actively generated by the first node.

32. The method of claim 21, wherein: The frequency domain position of the first signal, the second signal, or the excitation signal is located in any one of the following: The first n PRBs of the band; The last n PRBs of the band; n PRBs in the guard band immediately adjacent to the first PRB in the frequency band; n PRBs in the guard band immediately adjacent to the last PRB in the frequency band; There are n PRBs, where the n PRBs include n1 PRBs in a guard band of a frequency band and n2 PRBs in an adjacent frequency band, where n, n1, and n2 are positive integers.

33. A communication device comprising: a processor and a memory for storing instructions executable by the processor; The processor is configured to execute the instructions so that the communication device performs the signal transmission method according to any one of claims 1 to 32.

34. A computer-readable storage medium, wherein: The computer-readable storage medium stores computer instructions, causing the communication device to execute the signal transmission method according to any one of claims 1 to 32.

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