Communication method, electronic device, storage medium and computer program product

Abstract

The present application relates to, but is not limited to, the technical field of communication. Provided are a communication method, an electronic device, a storage medium and a computer program product. The communication method comprises: first, sending a first forward link (FL) signal at a first frequency; next, sending a second FL signal at a second frequency; and then, on the basis of a reverse link (RL) frequency, receiving an RL signal sent by a second node, wherein the first FL signal carries frequency indication information, and the RL frequency is determined on the basis of at least one of the frequency indication information and the second frequency.

Description

Communication method, electronic device, storage medium and computer program product

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202410166242.1 and application date of February 5, 2024, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of communication technology, and in particular to a communication method, electronic device, storage medium, and computer program product. Background Art

[0004] With the continuous advancement of radio technology, a wide variety of radio services have emerged. A basic network or cell in traditional wireless communications generally consists of a central node and multiple terminal nodes. For example, in cellular networks, a base station communicates with multiple user equipment (UEs), such as in 4G, 5G, and 6G communications; in wireless local area networks, an access point (AP) communicates with a station (STA); and in new short-range communications, a G-node (management node) and a T-node (terminal node). In these wireless communications, communication from the central node to the terminal node is generally referred to as downlink (DL), while communication from the UE to the base station, from the STA to the AP, and from the T-node to the G-node is referred to as uplink (UL). If the DL and UL use different spectrum or frequency bands for duplex communication (FDD), such as using a pair of spectrums for FDD communication, DL and UL communication using the same spectrum at different times is generally referred to as time division duplex (TDD). Full-duplex communication using different sub-bands on the TDD spectrum is also a type of FDD and is also referred to as FDD. The subbands include downlink subbands (DL subband) and uplink subbands (UL subband). For FDD, they include at least one downlink spectrum band (DL band) for DL ​​communication and at least one uplink spectrum band (UL band) for UL communication.

[0005] However, the devices involved in these communications generally consume a lot of energy. Even terminal nodes require a power supply or battery, resulting in high manufacturing and maintenance costs. On the other hand, some large-scale commercial use cases (warehousing, logistics, supply chain, smart home, environmental monitoring, smart farming, and finding items) require small, low-cost, and maintenance-free IoT devices. These devices do not rely on batteries for power, but instead draw energy from the surrounding environment, thereby extending the device lifespan. These battery-independent IoT devices are commonly referred to as the Ambient Internet of Things (A-IoT) or Passive Internet of Things (P-IoT). Therefore, determining the communication frequency of devices in Ambient IoT communication scenarios is a major challenge currently facing the industry. Summary of the Invention

[0006] The embodiments of the present application provide a communication method, electronic device, storage medium, and computer program product, which aim to solve the problem of determining the communication frequency of devices in an ambient Internet of Things communication scenario, thereby achieving duplex communication.

[0007] In a first aspect, an embodiment of the present application provides a communication method, applied to a first node, the method comprising:

[0008] Sending a first forward communication FL signal at a first frequency;

[0009] sending a second FL signal at a second frequency;

[0010] receiving an RL signal sent by the second node based on the return communication RL frequency;

[0011] The first FL signal carries frequency indication information, and the RL frequency is determined according to the frequency indication information and the second frequency.

[0012] In a second aspect, an embodiment of the present application provides a communication method, applied to a second node, the method comprising:

[0013] receiving a first forward communication FL signal sent at a first frequency, wherein the first FL signal carries frequency indication information;

[0014] receiving a second FL signal transmitted at a second frequency;

[0015] Determine a return communication RL frequency according to the frequency indication information and the second frequency;

[0016] An RL signal is sent at the RL frequency.

[0017] In a third aspect, an embodiment of the present application provides an electronic device, including:

[0018] one or more processors;

[0019] A memory having one or more programs stored thereon, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the communication method as described in the first aspect above; or, the communication method as described in the second aspect above.

[0020] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the communication method as described in the first aspect above; or, the communication method as described in the second aspect above.

[0021] In a fifth aspect, an embodiment of the present application provides a computer program product, comprising a computer program, which, when executed by a processor, implements the communication method as described in the first aspect above; or, the communication method as described in the second aspect above.

[0022] The communication method, electronic device, storage medium, and computer program product provided in the embodiments of the present application first transmit a first forward communication FL signal at a first frequency; then transmit a second FL signal at a second frequency; and then receive an RL signal sent by a second node based on a return communication RL frequency; wherein the first FL signal carries frequency indication information, and the RL frequency is determined based on the frequency indication information and the second frequency. This application addresses the problem of determining the communication frequency of a device in an ambient IoT communication scenario by deriving the RL frequency based on at least one of the frequency indication information and the second frequency carried by the first FL signal, and receiving the RL signal sent by the second node based on the RL frequency, thereby achieving duplex communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0024] FIG1 is a flow chart of a communication method provided in an embodiment of the present application;

[0025] FIG2 is a flow chart of a communication method provided in another embodiment of the present application;

[0026] FIG3 is a schematic diagram of the frequencies used in A-IoT communication according to one embodiment of the present application;

[0027] FIG4 is a schematic diagram of the frequencies used for A-IoT communication provided by another embodiment of the present application;

[0028] FIG5 is a schematic diagram of the frequencies used for A-IoT communication provided by another embodiment of the present application;

[0029] FIG6 is a schematic diagram of the frequencies used for A-IoT communication provided by another embodiment of the present application;

[0030] FIG7 is a schematic diagram of the frequencies used in A-IoT communication according to another embodiment of the present application;

[0031] FIG8 is a schematic diagram of the device structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0033] It should be understood that in the description of the embodiments of the present application, if there is a description of "first", "second", etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features. "At least one" means one or more, and "more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any group of these items, including any group of single or plural items. For example, at least one of a, b and c can represent: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c can be single or multiple.

[0034] In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0035] To facilitate understanding of the solutions of the embodiments of the present application and to provide a clear and concise description of the following embodiments, a brief introduction to the relevant technologies is first given:

[0036] With the continuous advancement of radio technology, a wide variety of radio services have emerged. A basic network or cell in traditional wireless communications generally consists of a central node and multiple terminal nodes. For example, in cellular networks, a base station communicates with multiple user equipment (UEs), as in 4G, 5G, and 6G communications; in wireless local area networks, an access point (AP) communicates with a station (STA); and in new short-range communications, a G-node (management node) and a T-node (terminal node). In these wireless communications, communication from the central node to the terminal node is generally referred to as downlink (DL), while communication from the UE to the base station, from the STA to the AP, and from the T-node to the G-node is referred to as uplink (UL). If the DL and UL use different spectrum or frequency bands for duplex communication (FDD), such as using a pair of spectrums for FDD communication, DL and UL communication using the same spectrum at different times is generally referred to as time division duplex (TDD). Full-duplex communication using different subbands on the TDD spectrum is also a type of FDD and is also referred to as FDD. For FDD, it includes at least one DL spectrum for DL ​​communication and at least one UL spectrum for UL communication.

[0037] However, the devices involved in these communications generally consume a lot of energy. Even terminal nodes require a power supply or battery, resulting in high manufacturing and maintenance costs. On the other hand, some large-scale commercial use cases (warehousing, logistics, supply chain, smart home, environmental monitoring, smart farming, and finding items) require small, low-cost, and maintenance-free IoT devices. These devices do not rely on batteries for power, but instead draw energy from the surrounding environment, thereby extending the device lifespan. These battery-independent IoT devices are commonly referred to as the Ambient Internet of Things (A-IoT) or Passive Internet of Things (P-IoT). Therefore, determining the communication frequency of devices in Ambient IoT communication scenarios is a major challenge currently facing the industry.

[0038] From the perspective of A-IoT wireless communication (point-to-point communication from one device to another), devices participating in A-IoT communication may include:

[0039] A-IoT master node: can identify, read and write to secondary nodes through communication. It is also called a reader, reader / writer or interrogator in related technologies. The master node can be a central node in a traditional network, such as a base station, AP, G node, relay or intermediate node, or a terminal node in a traditional network, such as UE, STA, T node, etc.

[0040] A-IoT secondary node: A low-cost IoT device, generally without a battery, that can respond to communications from the primary node. Generally, A-IoT devices in a narrow sense refer to secondary nodes, tags, etc.

[0041] From the perspective of the A-IoT system, in addition to the above-mentioned master nodes and secondary nodes, it can also include:

[0042] Network-side devices, including devices used to configure and manage communications, backend databases, servers, and other high-level network entities

[0043] Specialized energy supply devices, such as A-IoT Tags, can be powered by the surrounding environment, such as light energy, radio frequency energy, etc., or they can be used to provide these energies to the Tags.

[0044] For ease of description, the following embodiments of this application will use the reader and tag as an example to describe the communication between the primary node and the secondary node in A-IoT. Communication from the reader to the tag can be called forward link (FL), while communication from the tag to the reader is called return / reverse link (RL).

[0045] A-IoT communication may use the spectrum of traditional communications. In addition to A-IoT communication capabilities, readers also have traditional communication capabilities. Tags are different from traditional devices and need to consider the frequencies used by the above-mentioned FL and RL frequencies. While meeting A-IoT communication, traditional DL and UL communications must also be considered to avoid mutual interference.

[0046] For example, traditional readers and tags generally operate on the same spectrum, that is, similar to the TDD working mode. For example, the 920Mhz~925Mhz frequency band can be used for radio frequency identification communication. The reader can transmit an FL modulated signal to the tag at one moment in the frequency band, and use the same frequency band to send a CW signal at a different time, and at the same time receive the RL frequency sent by the tag in the frequency band. However, for traditional communication systems, some frequency bands are required to carry out FDD communication in regulations. In addition, both the central node and the terminal node of traditional communication may be used as readers. When a traditional base station operates in the FDD spectrum, it only transmits in the DL spectrum and only receives in the UL spectrum, while the UE transmits on the UL spectrum and receives on the DL spectrum. Generally, the frequency used when the tag sends is around the CW signal frequency, that is, around the second frequency.

[0047] If the unpaired spectrum operation mode of TDD is used in the FDD spectrum, that is, only one spectrum in the paired spectrum is used (hereinafter referred to as Mode 1), it may violate the FDD frequency band usage regulations and also cause the following problems:

[0048] If only FDD DL spectrum is used, the base station or terminal needs to implement full-duplex or sub-band full-duplex on the DL spectrum, which places high demands on the equipment. For example, the base station needs to transmit DL on the DL spectrum while receiving RL frequencies on the DL spectrum. The self-interference of transmission and reception will be very serious, requiring the base station to perform complex self-interference elimination. For the UE acting as a reader, its capabilities are generally lower than that of the base station, making it difficult to transmit FL modulated signals while performing DL reception on the DL spectrum.

[0049] If only the FDD UL spectrum is used, the base station or terminal will also face the aforementioned full-duplex self-interference problem. For UE-type readers, the transmission of UL signals and the reception of RL frequencies can be separated in time through time division to avoid the aforementioned self-interference. In other words, the UE does not expect to be scheduled for UL transmission and A-IoT communication simultaneously. A-IoT communication includes at least one of the following: CW transmission, RL frequency reception, and FL modulated signal transmission. Alternatively, if the UE is scheduled for both UL transmission and A-IoT communication, it needs to perform only one of these operations based on the priority rules.

[0050] For FDD spectrum, all FL signals are sent in one spectrum, and RL signals are sent in a corresponding spectrum (hereinafter referred to as Mode 2). For example, for a base station acting as a reader, the FL modulated signal and CW are sent in the DL spectrum, while the RL signal is sent in the UL spectrum. For a UE acting as a reader, the FL modulated signal and CW are sent in the UL spectrum, while the RL signal is sent in the DL spectrum. Although this approach does not prevent the full-duplex self-interference issue mentioned above when operating in FDD mode, it requires the tag to receive the CW signal in one spectrum and move the return signal to another spectrum, spanning more than 10MHz. This places high demands on the tag. Traditional tag return frequencies are generally around the second frequency used by CW. Furthermore, tag modulation is generally double-sided, meaning that the movement is also bidirectional. Only one side of the spectrum falls within the corresponding spectrum, while the other sideband can cause interference to other devices. To avoid this interference, additional processing is required within the tag, further increasing its complexity.

[0051] However, Mode 1 has higher requirements for the Reader device, while Mode 2 has higher requirements for the Tag.

[0052] Based on this, the embodiments of the present application provide a communication method, electronic device, storage medium and computer program product, which aim to solve the problem of determining the communication frequency of devices in environmental Internet of Things communication scenarios, thereby realizing duplex communication.

[0053] Please refer to Figure 1, which is a flow chart of a communication method provided in an embodiment of the present application. The communication method is applied to a first node. As shown in Figure 1, the communication method may include but is not limited to the following steps S110-S130.

[0054] Step S110, sending a first forward communication FL signal at a first frequency, wherein the first FL signal carries frequency indication information;

[0055] Step S120, sending a second FL signal at a second frequency;

[0056] Step S130: receiving an RL signal sent by the second node based on the return communication RL frequency, where the RL frequency is determined according to at least one of the frequency indication information and the second frequency.

[0057] It should be noted that the first node described in the embodiment of the present application represents the main node in A-IoT, and the second node represents the secondary node in A-IoT. The main node first sends a first FL signal carrying frequency indication information at a first frequency, and then sends a second FL signal at a second frequency; the second node receives the first FL signal and the second FL signal sent by the main node, and then determines the RL frequency according to the frequency indication information and / or the second frequency, and sends the RL signal to the first node at the RL frequency. In this way, signal interference between different nodes can be avoided, ensuring the stability and reliability of communication; in addition, by using different frequencies for signal transmission, energy consumption during signal transmission can be reduced; in addition, nodes can achieve efficient communication through simple logical judgment and frequency switching, which helps to reduce the complexity and cost of the system and improve the maintainability and reliability of the equipment.

[0058] In some examples, the first node is a base station and the second node is a user terminal. The base station transmits a first frequency-limited (FL) signal carrying frequency indication information at a first frequency, and then transmits a second frequency-limited (FL) signal at a second frequency. The user terminal then receives the first and second frequency-limited (FL) signals transmitted by the base station, determines an RL frequency based on the frequency indication information and / or the second frequency, and transmits an RL signal to the base station at the RL frequency.

[0059] In some examples, the first node is an AP and the second node is a STA. The AP transmits a first frequency-limited (FL) signal carrying frequency indication information at a first frequency, and then transmits a second frequency-limited (FL) signal at a second frequency. The STA then receives the first and second FL signals from the AP, determines an RL frequency based on the frequency indication information and / or the second frequency, and transmits an RL signal to the AP at the RL frequency.

[0060] In some examples, the first node is a G node and the second node is a T node. The G node transmits a first FL signal carrying frequency indication information at a first frequency, and then transmits a second FL signal at a second frequency. The T node then receives the first and second FL signals transmitted by the G node, determines an RL frequency based on the frequency indication information and / or the second frequency, and transmits an RL signal to the G node at the RL frequency.

[0061] In some other embodiments, the first node is a user terminal and the second node is a base station; or, the first node is a STA and the second node is an AP; or, the first node is a T-node and the second node is a G-node. The embodiments of the present application do not impose any restrictions on the specific types of the first node and the second node.

[0062] This application addresses the problem of determining the communication frequency of a device in an environmental IoT communication scenario. It achieves duplex communication by obtaining an RL frequency based on the frequency indication information carried by a first FL signal and at least one of the second frequencies, and receiving an RL signal sent by a second node based on the RL frequency.

[0063] It can be understood that the RL frequency of the present application can be determined according to the frequency indication information, can be determined according to the second frequency, or can be determined according to the frequency indication information and the second frequency, and the embodiments of the present application do not specifically limit it.

[0064] It should be noted that the RL frequency of the present application includes a third frequency, and the frequency indication information is configured to be used to determine the third frequency.

[0065] It can be understood that, since the first FL signal of the present application carries frequency indication information, the frequency indication information is configured to be used to determine the third frequency. Therefore, the third frequency can be determined through the first FL signal.

[0066] Exemplarily, the second node may determine the third frequency according to the frequency indication information carried by the first FL signal, and then send the RL signal to the first node at the third frequency.

[0067] It should be noted that the RL frequency of the present application includes a fourth frequency, and the fourth frequency is obtained by offsetting the third frequency by the second frequency.

[0068] It can be understood that, after the present application determines the third frequency according to the frequency indication information carried by the first FL signal, the fourth frequency is obtained by offsetting the third frequency according to the second frequency.

[0069] For example, the second node determines the third frequency according to the frequency indication information carried by the first FL signal, determines the second frequency according to the second FL signal, and then adds the second frequency to the third frequency to obtain the fourth frequency.

[0070] For another example, the second node determines the third frequency according to the frequency indication information carried by the first FL signal, determines the second frequency according to the second FL signal, and then subtracts the second frequency from the third frequency to obtain the fourth frequency.

[0071] It should be noted that the frequency indication information includes one of the following:

[0072] The value of the third frequency; or, the index of the third frequency.

[0073] It can be understood that the frequency indication information of the present application includes the value of the third frequency or the index of the third frequency.

[0074] For example, the frequency indication information carried by the first FL signal directly indicates that the value of the third frequency is 60 KHz. Then, the second node can directly determine that the third frequency is 60 KHz according to the frequency indication information carried by the first FL signal.

[0075] For another example, the frequency indication information carried by the first FL signal directly indicates that the index of the third frequency is 1. Then, the second node can determine that the index of the third frequency is 1 based on the frequency indication information carried by the first FL signal, and then search for the corresponding third frequency value based on index 1. Assuming that the third frequency corresponding to index 1 is 60KHz, the third frequency is determined to be 60KHz.

[0076] It should be noted that the RL frequency may be equal to the second frequency, that is, after the second node determines the second frequency according to the second FL signal, it sends the RL signal to the first node at the second frequency.

[0077] It should be noted that the basic time domain period of the RL signal of the present application is the inverse of the RL frequency. Specifically, it can be the inverse of the third frequency, the inverse of the second frequency, or the inverse of the fourth frequency. The present application does not make any specific limitation on the basic time domain period of the RL signal.

[0078] In addition, it should be noted that the frequency indication information includes one of the following:

[0079] A scaling factor of the third frequency relative to the fifth frequency; or an offset factor of the third frequency relative to the fifth frequency.

[0080] It is understandable that the scale factor and offset factor of the present application may be indicated directly, or different scale factor and offset factor values ​​may correspond to different indexes, that is, the index of the corresponding scale factor and offset factor may be indicated in the frequency indication information.

[0081] It can be understood that since the frequency indication information of the present application includes the proportional factor of the third frequency relative to the fifth frequency or the offset factor of the third frequency relative to the fifth frequency, the corresponding third frequency can be obtained based on the proportional factor of the third frequency relative to the fifth frequency or the offset factor of the third frequency relative to the fifth frequency.

[0082] It should be noted that the fifth frequency of the present application is a preconfigured value or is determined according to the length of the calibration signal carried by the first FL signal.

[0083] It can be understood that the fifth frequency of the present application can be a preconfigured value and can be determined according to the length of the calibration signal carried by the first FL signal. The embodiment of the present application does not specifically limit the determination of the fifth frequency.

[0084] Exemplarily, the fifth frequency is determined according to the length of the calibration signal carried by the first FL signal. If the length of the calibration signal carried by the first FL signal is T, then the fifth frequency is 1 / T or a multiple of 1 / T.

[0085] It should be noted that the first FL signal is a modulated signal carrying information; the second FL signal is an unmodulated signal.

[0086] It will be understood that the first FL signal of the present application is a modulated signal carrying information, and may be a start character, a preamble, a delimiter, a synchronization signal, a calibration signal, a signaling signal, a control signal, a data signal, a check signal, or an end character. The present application does not impose any specific restrictions on the type of the first FL signal.

[0087] It is understandable that the second FL signal of the present application is an unmodulated signal, which can be a continuous carrier (CW) that does not contain information, a sine wave, or a cosine wave. The embodiments of the present application do not impose any specific restrictions on the type of the second FL signal.

[0088] It should be noted that the CW can provide RF energy for the Tag, and the CW can also provide a carrier for the RL signal sent by the Tag. For example, the Tag modulates and reflects the CW to generate the RL signal.

[0089] It should be noted that the RL signal in this application is a signal that carries information after modulation.

[0090] It can be understood that the RL signal of the present application is a signal that carries information after modulation, which can be a start symbol, a preamble, a separator, a control signal, a data signal, a check signal, or an end symbol. The embodiments of the present application do not specifically limit the type of RL signal.

[0091] Exemplarily, CW is modulated to carry information sent to the Reader. During the modulation process, the fourth frequency used by the RL signal is determined by the third frequency and the second frequency used by CW. Therefore, after the third frequency is obtained, the corresponding fourth frequency can be obtained through the second frequency.

[0092] Specifically, in a possible embodiment, before the above step S110, it may include but is not limited to step S100.

[0093] Step S100: Acquire frequency configuration information corresponding to the node, wherein the frequency configuration information is used to determine at least one of a first frequency, a second frequency, or an RL frequency.

[0094] It is understandable that when the frequency configuration information corresponding to the current node is obtained, at least one of the corresponding first frequency, second frequency or RL frequency can be obtained through the frequency configuration information.

[0095] Exemplarily, when the first node is a terminal node, the central node corresponding to the terminal node can send frequency configuration information and determine at least one of the first frequency, the second frequency or the RL frequency based on the frequency configuration information; when the first node is a central node, the frequency configuration information can be obtained from the network side, thereby determining at least one of the first frequency, the second frequency or the RL frequency based on the frequency configuration information.

[0096] Specifically, in a possible embodiment, the first node is any master node in the network, and after the above step S100, the process may include but is not limited to step S140.

[0097] Step S140: Notify the frequency configuration information corresponding to the node to other master nodes in the network.

[0098] It should be noted that the first node of this application is any master node in the network. The first node can notify the other master nodes in the network of the frequency configuration information corresponding to the node. For example, to avoid mutual interference between multiple readers, the reader can notify other readers of its own frequency configuration information. Or, to avoid interference between A-IoT communication and traditional communication, the reader can also notify traditional communication nodes of the frequency configuration information used by A-IoT to avoid mutual interference.

[0099] In addition, it should be noted that when the first node is the central node, the first frequency is at least located in the downlink spectrum, the second frequency is at least located in the uplink spectrum, and the RL frequency is at least located in the uplink spectrum; or, the first frequency is at least located in the downlink spectrum, the second frequency is located in the spectrum between the uplink spectrum and the downlink spectrum, and the RL frequency is at least located in the uplink spectrum; or, the first frequency is at least located in the downlink spectrum, the second frequency is located in the spectrum between the uplink spectrum and the downlink spectrum, and the RL frequency is located in the spectrum between the uplink spectrum and the downlink spectrum; or, the first frequency is at least located in the downlink spectrum, the second frequency is located in the uplink spectrum, and the RL frequency is at least located in the spectrum between the uplink spectrum and the downlink spectrum.

[0100] It can be understood that the spectrum allocation scheme of the present application can improve spectrum efficiency, enhance flexibility, promote spectrum sharing, and balance different communication needs.

[0101] In addition, it should be noted that when the first node is a terminal node, the first frequency is at least located in the uplink spectrum, the second frequency is at least located in the downlink spectrum, and the RL frequency is at least located in the downlink spectrum; or, the first frequency is at least located in the uplink spectrum, the second frequency is located in the spectrum between the uplink spectrum and the downlink spectrum, and the RL frequency is at least located in the downlink spectrum; or, the first frequency is at least located in the uplink spectrum, the second frequency is located in the spectrum between the uplink spectrum and the downlink spectrum, and the RL frequency is located in the spectrum between the uplink spectrum and the downlink spectrum; or, the first frequency is at least located in the uplink spectrum, the second frequency is located in the downlink spectrum, and the RL frequency is at least located in the spectrum between the uplink spectrum and the downlink spectrum.

[0102] It can be understood that the spectrum allocation scheme of the present application can improve spectrum efficiency, enhance flexibility, promote spectrum sharing, and balance different communication needs.

[0103] It should be noted that the above-mentioned uplink spectrum and downlink spectrum are paired spectrums in frequency division duplex (FDD) communication; the uplink spectrum represents the guard band of the uplink spectrum; the downlink spectrum represents the guard band of the downlink spectrum.

[0104] For example, since there may be UL or DL ​​communication on the uplink or downlink spectrum, in order to avoid mutual influence with A-IoT communication, the FL or RL signal can be at least located in the guard band on the uplink or downlink spectrum of FDD.

[0105] It can be understood that the guard band is generally located at the edge of an uplink or downlink spectrum or at the edge of a carrier in the uplink or downlink spectrum.

[0106] It is understandable that FL or RL signals can also occupy the spectrum originally used for traditional communications, but in order to avoid mutual interference between FL or RL signals and DL / UL signals of traditional communications, generally, traditional communication signals are not expected within the operating spectrum range of A-IoT.

[0107] It can be understood that, in the case of sub-band FDD, the FL or RL signal may be located at least in the guard band of the uplink sub-band and the downlink sub-band.

[0108] It should be noted that the first frequency, the second frequency and the RL frequency are located in the same frequency spectrum.

[0109] It can be understood that since the first frequency, the second frequency and the RL frequency are located in the same spectrum, the spectrum resources can be shared more effectively, thereby improving the efficiency of spectrum utilization; in addition, deploying multiple frequencies in the same spectrum can increase the communication capacity of the system, thereby supporting more data transmission and communication needs; in addition, by utilizing multiple frequencies in the same spectrum, a higher data transmission rate can be achieved to meet the demand for high-speed data transmission.

[0110] In addition, it should be noted that A-IoT communication can not only utilize paired spectrum, but also operate in non-paired spectrum (NPS), for example, operating in a single spectrum, which can be TDD spectrum, unlicensed spectrum, or uplink spectrum or downlink spectrum of paired spectrum. That is, the first frequency, the second frequency, and the RL frequency are all on the same spectrum. Therefore, the present application can better adapt to different spectrum environments and application requirements, providing communication devices with more efficient, reliable and low-latency communication connections.

[0111] Please refer to Figure 2, which is a flow chart of a communication method provided by another embodiment of the present application, which is applied to the second node. As shown in Figure 2, the communication method may include but is not limited to the following steps S210-S240. Each step is described in sequence below:

[0112] Step S210, receiving a first forward communication FL signal sent at a first frequency, wherein the first FL signal carries frequency indication information;

[0113] Step S220, receiving a second FL signal sent at a second frequency;

[0114] Step S230, determining a return communication RL frequency according to at least one of the frequency indication information and the second frequency;

[0115] Step S240: Send an RL signal at the RL frequency.

[0116] It should be noted that, first, the present application receives a first forward communication FL signal sent at a first frequency, wherein the first FL signal carries frequency indication information; then, the present application receives a second FL signal sent at a second frequency; then, the present application determines a return communication RL frequency based on the frequency indication information and at least one of the second frequencies; finally, the RL signal is sent at the RL frequency.

[0117] It is worth noting that the present application addresses the problem of determining the communication frequency of devices in environmental IoT communication scenarios by obtaining the RL frequency based on the frequency indication information carried by the first FL signal and at least one of the second frequencies, and receiving the RL signal sent by the second node based on the RL frequency, thereby achieving duplex communication.

[0118] It can be understood that the RL frequency of the present application can be determined according to the frequency indication information, can be determined according to the second frequency, or can be determined according to the frequency indication information and the second frequency, and the embodiments of the present application do not specifically limit it.

[0119] In a possible embodiment, the RL frequency of the present application includes a third frequency. Regarding the above step S230, it may include but is not limited to step S250.

[0120] Step S250: Determine a third frequency according to the frequency indication information.

[0121] It can be understood that, since the first FL signal of the present application carries frequency indication information, the frequency indication information is configured to be used to determine the third frequency. Therefore, the third frequency can be determined through the frequency indication information.

[0122] In a possible embodiment, the RL frequency of the present application includes a third frequency and a fourth frequency. Regarding the above step S230, it may include but is not limited to step S260 and step S270.

[0123] Step S260, determining a third frequency according to the frequency indication information;

[0124] Step S270: Obtain a fourth frequency by offsetting the third frequency according to the second frequency.

[0125] It can be understood that, after the present application determines the third frequency according to the frequency indication information carried by the first FL signal, the fourth frequency is obtained by offsetting the third frequency according to the second frequency.

[0126] Exemplarily, the second node shifts the third frequency based on the second frequency of the detected second FL signal, that is, adds or subtracts the third frequency, thereby obtaining the fourth frequency.

[0127] It should be noted that the frequency indication information includes one of the following:

[0128] The value of the third frequency; or, the index of the third frequency.

[0129] It can be understood that, since the frequency indication information of the present application includes the value of the third frequency or the index of the third frequency, the corresponding third frequency can be confirmed according to the value of the third frequency or the index of the third frequency.

[0130] It should be noted that the basic time domain period of the RL signal of the present application may be the inverse of the RL frequency, or the inverse of the third frequency. The present application does not impose any specific limitation on the basic time domain period of the RL signal.

[0131] In addition, it should be noted that the frequency indication information includes one of the following:

[0132] A scaling factor of the third frequency relative to the fifth frequency; or an offset factor of the third frequency relative to the fifth frequency.

[0133] It can be understood that the scale factor and offset factor of the present application can be indicated directly, or different values ​​of the scale factor and offset factor can correspond to different indexes, that is, the index of the corresponding third frequency is indicated in the frequency indication information.

[0134] It can be understood that since the frequency indication information of the present application includes the proportional factor of the third frequency relative to the fifth frequency or the offset factor of the third frequency relative to the fifth frequency, the corresponding third frequency can be obtained based on the proportional factor of the third frequency relative to the fifth frequency or the offset factor of the third frequency relative to the fifth frequency.

[0135] It should be noted that the fifth frequency of the present application is a preconfigured value or is determined according to the length of the calibration signal carried by the first FL signal.

[0136] It can be understood that the fifth frequency of the present application can be a preconfigured value and can be determined according to the length of the calibration signal carried by the first FL signal. The embodiment of the present application does not specifically limit the determination of the fifth frequency.

[0137] Exemplarily, the fifth frequency is determined according to the length of the calibration signal carried by the first FL signal. If the length of the calibration signal carried by the first FL signal is T, then the fifth frequency is 1 / T or a multiple of 1 / T.

[0138] It should be noted that the first FL signal is a modulated signal carrying information; the second FL signal is an unmodulated signal.

[0139] It will be understood that the first FL signal of the present application is a modulated signal carrying information, and may be a start character, a preamble, a delimiter, a synchronization signal, a calibration signal, a signaling signal, a control signal, a data signal, a check signal, or an end character. The present application does not impose any specific restrictions on the type of the first FL signal.

[0140] It is understandable that the second FL signal of the present application is an unmodulated signal, which can be a continuous carrier (CW) that does not contain information, a sine wave, or a cosine wave. The embodiments of the present application do not impose any specific restrictions on the type of the second FL signal.

[0141] It should be noted that the CW can provide RF energy for the Tag, and the CW can also provide a carrier for the RL signal sent by the Tag. For example, the Tag modulates and reflects the CW to generate the RL signal.

[0142] It should be noted that the RL signal in this application is a signal that carries information after modulation.

[0143] It can be understood that the RL signal of the present application is a signal that carries information after modulation, which can be a start symbol, a preamble, a separator, a control signal, a data signal, a check signal, or an end symbol. The embodiments of the present application do not specifically limit the type of RL signal.

[0144] Exemplarily, CW is modulated to carry information sent to the Reader. During the modulation process, the fourth frequency used by the RL signal is determined by the third frequency and the second frequency used by CW. Therefore, after the third frequency is obtained, the corresponding fourth frequency can be obtained through the second frequency.

[0145] It should be noted that the RL frequency can also be equal to the second frequency, for example, the center frequency of the return signal is the same as the center frequency of the CW; it can also be understood that the third frequency is 0 and the fourth frequency is equal to the second frequency.

[0146] In addition, it should be noted that when the second node is a terminal node, the first frequency is at least located in the downlink spectrum, the second frequency is at least located in the uplink spectrum, and the RL frequency is at least located in the uplink spectrum; or, the first frequency is at least located in the downlink spectrum, the second frequency is located in the spectrum between the uplink spectrum and the downlink spectrum, and the RL frequency is at least located in the uplink spectrum; or, the first frequency is at least located in the downlink spectrum, the second frequency is located in the spectrum between the uplink spectrum and the downlink spectrum, and the RL frequency is located in the spectrum between the uplink spectrum and the downlink spectrum; or, the first frequency is at least located in the downlink spectrum, the second frequency is located in the uplink spectrum, and the RL frequency is at least located in the spectrum between the uplink spectrum and the downlink spectrum.

[0147] It can be understood that the spectrum allocation scheme of the present application can improve spectrum efficiency, enhance flexibility, promote spectrum sharing, and balance different communication needs.

[0148] In addition, it should be noted that when the second node is the central node, the first frequency is at least located in the uplink spectrum, the second frequency is at least located in the downlink spectrum, and the RL frequency is at least located in the downlink spectrum; or, the first frequency is at least located in the uplink spectrum, the second frequency is located in the spectrum between the uplink spectrum and the downlink spectrum, and the RL frequency is at least located in the downlink spectrum; or, the first frequency is at least located in the uplink spectrum, the second frequency is located in the spectrum between the uplink spectrum and the downlink spectrum, and the RL frequency is located in the spectrum between the uplink spectrum and the downlink spectrum; or, the first frequency is at least located in the uplink spectrum, the second frequency is located in the downlink spectrum, and the RL frequency is at least located in the spectrum between the uplink spectrum and the downlink spectrum.

[0149] It can be understood that the spectrum allocation scheme of the present application can improve spectrum efficiency, enhance flexibility, promote spectrum sharing, and balance different communication needs.

[0150] It should be noted that the above-mentioned uplink spectrum and downlink spectrum are paired spectrums in frequency division duplex (FDD) communication; the uplink spectrum represents the guard band of the uplink spectrum; the downlink spectrum represents the guard band of the downlink spectrum.

[0151] For example, since there may be UL or DL ​​communication on the uplink or downlink spectrum, in order to avoid mutual influence with A-IoT communication, the FL or RL signal can be at least located in the guard band on the uplink or downlink spectrum of FDD.

[0152] It should be noted that the first frequency, the second frequency and the RL frequency are located in the same frequency spectrum.

[0153] It can be understood that since the first frequency, the second frequency and the RL frequency are located in the same spectrum, the spectrum resources can be shared more effectively, thereby improving the efficiency of spectrum utilization; in addition, deploying multiple frequencies in the same spectrum can increase the communication capacity of the system, thereby supporting more data transmission and communication needs; in addition, by utilizing multiple frequencies in the same spectrum, a higher data transmission rate can be achieved to meet the demand for high-speed data transmission.

[0154] In addition, it should be noted that A-IoT communication can not only utilize paired spectrum, but also operate in non-paired spectrum (non-paired spectrum), for example, operating in a single spectrum, which can be TDD spectrum, unlicensed spectrum, or uplink spectrum or downlink spectrum of paired spectrum. That is, the first frequency, the second frequency, and the RL frequency are all on the same spectrum. Therefore, the present application can better adapt to different spectrum environments and application requirements, providing communication devices with more efficient, reliable and low-latency communication connections.

[0155] Example 1:

[0156] As shown in FIG3 , in this application, the central node is taken as a Reader as an example, such as a base station working in a paired spectrum, using the A-IoT communication frequency shown in FIG3 .

[0157] It should be noted that the frequency of this application can refer to a frequency point or a frequency value, or it can refer to a frequency range. For example, it can refer to the center frequency point of a frequency range, or it can refer to the frequency range itself. The first frequency and the RL frequency carry useful information as a frequency range, the third frequency is a frequency value, and the second frequency does not modulate useful information and is a frequency point with a very narrow frequency, etc.

[0158] When the base station acts as a reader, to ensure maximum compatibility with traditional communications, it still uses the DL spectrum when sending A-IoT communications to the tag, and the UL spectrum when receiving return communications from the tag. The biggest difference compared to traditional communications is that the base station needs to send a second FL signal on the UL spectrum for return communications from the tag. The tag uses this second FL signal for return communications and sends information to the reader on the RL frequency.

[0159] The operating frequency of a tag is a frequency range, as shown in FIG3 . Generally, the frequency used for FL and the frequency used for RL are both within the operating frequency range of the tag. That is, the operating frequency range of the tag includes at least the frequency used for FL and the frequency used for RL.

[0160] Through the frequency indication information, the first frequency used by the first FL signal can be placed in the DL spectrum, the second FL signal can be placed in the UL spectrum, and the RL frequency can also be configured within the UL spectrum range, that is, the first frequency is located in the downlink spectrum; the second frequency is located in the uplink spectrum; and the RL frequency is located in the uplink spectrum. Therefore, there is no full-duplex interference problem in each frequency band on the Reader side. The base station sends the modulated first FL signal and DL signal only in the DL spectrum, while the RL frequency and UL reception are in the UL spectrum. Only the second FL signal is sent in the UL spectrum. The bandwidth of the second FL signal is very narrow and does not carry information, so it is easy to eliminate the interference of the second FL signal. That is, the problem of mode 1 is solved; in addition, the Tag does not require cross-band spectrum movement, which is relatively simple, that is, there is no problem of mode 2.

[0161] In this application, the terminal node as a reader can also follow the A-IoT communication frequency as shown in Figure 3. That is, the first frequency is located in the uplink spectrum; the second frequency is located in the downlink spectrum; and the RL frequency is also located in the downlink spectrum.

[0162] When the base station and UE communicate as a reader and a tag, a first frequency for the base station reader is defined on the DL spectrum, and another first frequency for the UE type reader is defined on the UL spectrum; a second frequency and an RL frequency for the base station are defined on the UL spectrum, and a second frequency and an RL frequency for the UE are defined on the DL spectrum.

[0163] Example 2:

[0164] In the present application, determining the RL frequency also includes determining the third frequency f3. The third frequency can be considered as a baseband or basic frequency of the RL signal, or as an offset frequency or subcarrier relative to the second frequency. Generally, a basic time domain period of the RL signal is 1 / f3. The third frequency and the RL frequency can also be considered equivalent. The reader can send frequency indication information about the third frequency in the modulated first FL signal sent, such as directly indicating the value of the third frequency, or the index corresponding to the third frequency, or indicating the proportional factor a of the third frequency relative to the fifth frequency (for example, a times the fifth frequency is the third frequency), or the frequency offset factor b (for example, offsetting the fifth frequency by b will obtain the third frequency).

[0165] It should be noted that the value of a or b mentioned above can also be indicated in the modulated first FL signal, and its numerical value can be directly indicated, or different values ​​of a and b can correspond to different indexes, and the corresponding indexes can be indicated in the frequency indication information. The fifth frequency is a preconfigured value, or the fifth frequency is determined by the length T of the calibration signal carried by the first FL signal. For example, the fifth frequency is 1 / T or a multiple of 1 / T. For example, a modulated signal with a length of 25us is sent as a calibration signal in the modulated first FL signal. The tag can obtain the corresponding fifth frequency of 40KHz, that is, 1 / (25us), by measuring the calibration signal. If the value of the proportional factor a indicated by the modulated first FL signal is 4, the third frequency is 160KHz, or it indicates an index corresponding to a. For example, index 1 represents a=3 / 2. If index 1 is indicated, it means that the third frequency is 60KHz.

[0166] It should be noted that using the third frequency to generate the corresponding RL communication fundamental or baseband waveform, and modulating the second FL signal with this baseband waveform and reflecting it, can generate the RL communication RF waveform that propagates in space. The RL frequency can also include a fourth frequency f4. If the second frequency is denoted as f2, then f4 is a frequency point of the RL communication RF waveform, and the relationship between them is f4 = f2 ± f3. The RL communication frequency range is located around the fourth frequency, which is equivalent to using a subcarrier at the third frequency, shifting the frequency used for RL communication away from the second frequency of the second FL signal to avoid mutual interference.

[0167] Example 3:

[0168] As shown in Figure 4, in this application, the RL frequency can be located in the DL or UL spectrum, and can be located in the spectrum between the DL spectrum and the UL spectrum. Generally, there is a certain bandwidth interval between the UL spectrum and the DL spectrum of FDD to avoid full-duplex self-interference. The frequency in the interval may be an unlicensed spectrum, an unlicensed spectrum, or a dedicated spectrum. If the energy of the Tag's RL communication is very small and meets the rules for using the spectrum in the interval, part of the RL frequency can also be located in the interval. Taking the base station as a reader as an example, the RL frequency can be located in the UL spectrum and the interval spectrum.

[0169] It is understandable that when the UE acts as a reader, the RL frequency may be located in the DL spectrum and the interval spectrum.

[0170] It is understood that when a tag can use one sideband to send an RL signal, it can send only one sideband. As shown in Figure 4, it can send only the RL frequency corresponding to f4 to the right of the second frequency, that is, only on the UL spectrum, or only the RL frequency on the left sideband, that is, only on the interval.

[0171] It is understandable that the reader may also notify the tag through frequency indication information, indicating at least one of the following information: whether to send only one sideband; and which sideband to send or filter.

[0172] Example 4:

[0173] As shown in Figure 5, in this application, the second frequency can also be sent within the interval, and the RL frequency is at least sent in the DL or UL spectrum, and can also be located in the spectrum between the DL spectrum and the UL spectrum. If the second FL signal sent by the reader and the RL signal reflected by the tag meet the rules for using the spectrum within the interval, the second frequency and part of the RL frequency can also be located in the interval. Taking the base station as a reader as an example, the second frequency can be transmitted within the interval, and the RL frequency can be located in the UL spectrum and the interval spectrum.

[0174] It can be understood that when the UE acts as a reader, the second frequency can be located in the interval, and the RL frequency is located in the DL spectrum and the interval spectrum.

[0175] It is understood that when a tag can use one sideband to send an RL signal, it may only send one sideband. For example, the RL signal is only sent in the DL spectrum, the UL spectrum, or the alternate spectrum.

[0176] Example 5:

[0177] As shown in Figure 6, in this application, the second frequency and the RL frequency can both be located within the interval, while the frequency of the first FL signal is located in the DL or UL spectrum. If the second FL signal sent by the reader and the RL signal reflected by the tag meet the spectrum usage rules within the interval, the second frequency and the RL frequency can both be located within the interval. Taking the base station as an example, the second frequency and the RL frequency can both be located within the interval, and the first frequency can be located at the DL frequency.

[0178] It can be understood that when the UE acts as a reader, the second FL signal transmitted by the UE and the RL signal transmitted by the tag can be located in the interval, and the first FL signal is located in the UL spectrum.

[0179] As shown in Figure 7, when a base station and a UE communicate as a reader and a tag, the second frequency and RL frequency corresponding to the base station reader and the UE reader can be different or the same. For example, the base station reader and the UE reader can use the same second frequency but different RL frequencies. Alternatively, the second frequency and RL frequency can be the same.

[0180] Example 6:

[0181] The reader of the present application can be divided into multiple entities. For example, the function of sending the second FL signal can be a separate entity, and the function of sending the first FL signal and receiving the RL signal can be another entity. This can avoid the interference problem of the reader receiving the RL signal while sending the second FL signal.

[0182] In the present application, a FL frequency range, such as a FL bandwidth part (Bandwidth Part, BWP), may be configured to determine a first frequency used by a first FL signal sent by a reader.

[0183] It is understood that for the Reader, the first frequency can be configured as a center frequency, a starting frequency, or an ending frequency. Optionally, the bandwidth of the first frequency can also be configured.

[0184] In the present application, an RL frequency range may be configured, such as an RL BWP, wherein the second frequency of the second FL signal sent by the Reader and the RL frequency of the Tag are both within the RL BWP.

[0185] It is understood that for the Reader, the RL frequency can also be directly configured as a frequency point, such as the center frequency point, the starting frequency point, the ending frequency point, or a frequency point offset by a certain bandwidth relative to the starting frequency point. In a special case, the second frequency can be equal to the configured frequency point. Optionally, the bandwidth of the RL frequency can also be configured.

[0186] In this application, the A-IoT frequency range can also be configured, such as the carrier or BWP of A-IoT, which can be understood as the working frequency range of the tag, which can include at least the RL frequency range and the FL frequency range.

[0187] It should be noted that the configuration here may include the Reader, network entity, upper layer, central node, and terminal node sending configuration or instruction information for configuration, and may also include pre-configuration on the network side, pre-definition of the protocol, and configuration according to certain predefined rules.

[0188] It can be understood that the above-mentioned Reader can be the first node and the Tag can be the second node.

[0189] The embodiment of the present application further provides an electronic device, as shown in FIG8 , the electronic device 1400 includes:

[0190] one or more processors 1410;

[0191] The memory 1420 stores one or more programs. When the one or more programs are executed by the one or more processors 1410, the one or more processors 1410 implement the following:

[0192] A communication method as applied to a first node; or

[0193] Such as the communication method applied to the second node.

[0194] The memory 1420 is a non-transient network system that can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory 1420 may include a high-speed random access memory and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory 1420 may optionally include a memory 1420 remotely located relative to the processor 1410, and these remote memories 1420 may be connected to the processor 1410 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0195] The memory 1420 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 1420 can store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 1420 and is called by the processor 1410 to execute the methods of the embodiments of this application.

[0196] The processor 1410 can be implemented using a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application.

[0197] In some embodiments, the electronic device further comprises:

[0198] Input / output interface, used to realize information input and output;

[0199] Communication interface, used to realize communication interaction between this device and other devices, which can be achieved through wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, Wi-Fi, Bluetooth, etc.);

[0200] A bus that transmits information between various components of the device (e.g., the processor 1410, memory 1420, input / output interfaces, and communication interfaces);

[0201] The processor 1410 , the memory 1420 , the input / output interface, and the communication interface can be communicatively connected to each other within the device via a bus.

[0202] An embodiment of the present application further provides a computer-readable storage medium storing computer-executable instructions for executing:

[0203] A communication method as applied to a first node; or

[0204] Such as the communication method applied to the second node.

[0205] An embodiment of the present application further provides a computer program product, including a computer program or computer instructions, wherein the computer program or computer instructions are stored in a computer-readable storage medium. A processor of a computer device reads the computer program or computer instructions from the computer-readable storage medium, and the processor executes the computer program or computer instructions, so that the computer device performs the following operations:

[0206] A communication method as applied to a first node; or

[0207] Such as the communication method applied to the second node.

[0208] The system architecture and application scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of the system architecture and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

[0209] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0210] Those skilled in the art will appreciate that all or some of the steps and systems in the method disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, and the computer-readable medium can include computer storage media (or non-transitory media) and communication media (or temporary media). As known to those skilled in the art, the term computer storage media is included in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data) and is volatile and non-volatile, removable, and non-removable. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory, or other memory technology, CD-ROM, digital versatile disks (DVD), or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage, or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, as is well known to those skilled in the art, communication media typically embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0211] The above description of some embodiments of the present application with reference to the accompanying drawings does not limit the scope of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and essence of the present application shall be within the scope of the present application.

Claims

1. A communication method, applied to a first node, comprising: Sending a first forward communication FL signal at a first frequency; sending a second FL signal at a second frequency; receiving an RL signal sent by the second node based on the return communication RL frequency; The first FL signal carries frequency indication information, and the RL frequency is determined according to at least one of the frequency indication information and the second frequency.

2. The method according to claim 1, wherein The RL frequency includes a third frequency, and the frequency indication information is configured to be used to determine the third frequency.

3. The method according to claim 2, wherein: The RL frequency further includes a fourth frequency, and the fourth frequency is obtained by offsetting the third frequency by the second frequency.

4. The method according to claim 2 or 3, wherein: The frequency indication information includes one of the following: the value of the third frequency; or, The index of the third frequency.

5. The method according to claim 2 or 3, wherein: The frequency indication information includes one of the following: a scaling factor of the third frequency relative to the fifth frequency; or, An offset factor of the third frequency relative to the fifth frequency.

6. The method according to claim 5, wherein: The fifth frequency is a preconfigured value; or, the fifth frequency is determined according to the length of the calibration signal carried by the first FL signal.

7. The method according to claim 1, wherein The first FL signal is a modulated signal carrying information; the second FL signal is an unmodulated signal.

8. The method according to claim 1 or 7, wherein The RL signal is a modulated signal that carries information.

9. The method according to claim 1, wherein: Before sending the first forward communication FL signal at the first frequency, the method further includes: Obtain frequency configuration information corresponding to the current node, where the frequency configuration information is used to determine at least one of the first frequency, the second frequency, or the RL frequency.

10. The method according to claim 9, wherein: The first node is any master node in the network. After acquiring the frequency configuration information, the method further includes: Notify other master nodes in the network of the frequency configuration information corresponding to the node.

11. The method according to claim 1, wherein The first node is a central node; The first frequency is at least located in a downlink spectrum, the second frequency is at least located in an uplink spectrum, and the RL frequency is at least located in the uplink spectrum; or, The first frequency is at least located in the downlink spectrum, the second frequency is located in a spectrum between the uplink spectrum and the downlink spectrum, and the RL frequency is at least located in the uplink spectrum; or, The first frequency is at least located in the downlink spectrum, the second frequency is located in a spectrum between the uplink spectrum and the downlink spectrum, and the RL frequency is located in a spectrum between the uplink spectrum and the downlink spectrum; or, The first frequency is at least located in the downlink spectrum, the second frequency is located in the uplink spectrum, and the RL frequency is at least located in a spectrum between the uplink spectrum and the downlink spectrum.

12. The method according to claim 1, wherein The first node is a terminal node; The first frequency is at least located in an uplink spectrum, the second frequency is at least located in a downlink spectrum, and the RL frequency is at least located in the downlink spectrum; or, The first frequency is at least located in the uplink spectrum, the second frequency is located in a spectrum between the uplink spectrum and the downlink spectrum, and the RL frequency is at least located in the downlink spectrum; or, The first frequency is at least located in the uplink spectrum, the second frequency is located in a spectrum between the uplink spectrum and the downlink spectrum, and the RL frequency is located in a spectrum between the uplink spectrum and the downlink spectrum; or, The first frequency is at least located in the uplink spectrum, the second frequency is located in the downlink spectrum, and the RL frequency is at least located in a spectrum between the uplink spectrum and the downlink spectrum.

13. The method according to claim 11 or 12, wherein: The uplink spectrum and the downlink spectrum are paired spectrums in frequency division duplex (FDD) communication; the uplink spectrum represents a guard band located in the uplink spectrum; and the downlink spectrum represents a guard band located in the downlink spectrum.

14. The method according to claim 1, wherein The first frequency, the second frequency, and the RL frequency are located in the same frequency spectrum.

15. A communication method, applied to a second node, comprising: receiving a first forward communication FL signal sent at a first frequency, wherein the first FL signal carries frequency indication information; receiving a second FL signal transmitted at a second frequency; Determine a return communication RL frequency according to at least one of the frequency indication information and the second frequency; An RL signal is sent at the RL frequency.

16. The method according to claim 15, wherein The RL frequency includes a third frequency, and determining the return communication RL frequency according to at least one of the frequency indication information and the second frequency includes: A third frequency is determined according to the frequency indication information.

17. The method according to claim 15, wherein: The RL frequency includes a third frequency and a fourth frequency, and determining the return communication RL frequency according to at least one of the frequency indication information and the second frequency includes: determining a third frequency according to the frequency indication information; The fourth frequency is obtained by shifting the third frequency according to the second frequency.

18. The method according to claim 16 or 17, wherein The frequency indication information includes one of the following: the value of the third frequency; or, The index of the third frequency.

19. The method according to claim 16 or 17, wherein: The frequency indication information includes one of the following: a scaling factor of the third frequency relative to the fifth frequency; or, An offset factor of the third frequency relative to the fifth frequency.

20. The method according to claim 19, wherein The fifth frequency is a preconfigured value; or, the fifth frequency is determined according to the length of the calibration signal carried by the first FL signal.

21. The method according to claim 15, wherein The first FL signal is a modulated signal carrying information; the second FL signal is an unmodulated signal.

22. The method according to claim 15 or 21, wherein The RL signal is a modulated signal that carries information.

23. The method according to claim 15, wherein The second node is a terminal node; The first frequency is at least located in a downlink spectrum, the second frequency is at least located in an uplink spectrum, and the RL frequency is at least located in the uplink spectrum; or, The first frequency is at least located in the downlink spectrum, the second frequency is located in a spectrum between the uplink spectrum and the downlink spectrum, and the RL frequency is at least located in the uplink spectrum; or, The first frequency is at least located in the downlink spectrum, the second frequency is located in a spectrum between the uplink spectrum and the downlink spectrum, and the RL frequency is located in a spectrum between the uplink spectrum and the downlink spectrum; or, The first frequency is at least located in the downlink spectrum, the second frequency is located in the uplink spectrum, and the RL frequency is at least located in a spectrum between the uplink spectrum and the downlink spectrum.

24. The method according to claim 15, wherein The second node is a central node; The first frequency is at least located in an uplink spectrum, the second frequency is at least located in a downlink spectrum, and the RL frequency is at least located in the downlink spectrum; or, The first frequency is at least located in the uplink spectrum, the second frequency is located in a spectrum between the uplink spectrum and the downlink spectrum, and the RL frequency is at least located in the downlink spectrum; or, The first frequency is at least located in the uplink spectrum, the second frequency is located in a spectrum between the uplink spectrum and the downlink spectrum, and the RL frequency is located in a spectrum between the uplink spectrum and the downlink spectrum; or, The first frequency is at least located in the uplink spectrum, the second frequency is located in the downlink spectrum, and the RL frequency is at least located in a spectrum between the uplink spectrum and the downlink spectrum.

25. The method according to claim 23 or 24, wherein The uplink spectrum and the downlink spectrum are paired spectrums in frequency division duplex (FDD) communication; the uplink spectrum represents a guard band located in the uplink spectrum; and the downlink spectrum represents a guard band located in the downlink spectrum.

26. The method according to claim 15, wherein The first frequency, the second frequency, and the RL frequency are located in the same frequency spectrum.

27. An electronic device comprising: one or more processors; A memory having one or more computer programs stored thereon, wherein when the one or more computer programs are executed by the one or more processors, the one or more processors are caused to implement the following: The communication method according to any one of claims 1 to 14; or, The communication method according to any one of claims 15 to 26.

28. A computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the computer program performs the following: The communication method according to any one of claims 1 to 14; or, The communication method according to any one of claims 15 to 26.

29. A computer program product comprising a computer program, wherein when the computer program is executed by a processor: The communication method according to any one of claims 1 to 14; or, The communication method according to any one of claims 15 to 26.

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