Communication method and device, equipment and storage medium

Abstract

The invention provides a communication method and device, equipment and a storage medium. The method comprises: a first device determines a first frequency unit, and the first device communicates with a second device on the first frequency unit. Wherein the granularity of the first channel grid corresponding to the first frequency unit is smaller than or equal to the granularity of the second channel grid corresponding to the second frequency unit, the second frequency unit is used for communication between the first device and the third device, and the first frequency unit and the second frequency domain unit are located in the same working frequency band. On one hand, the embodiment of the invention provides a solution for determining the frequency unit, so that the first equipment and the second equipment can realize communication through the first frequency unit; and on the other hand, when the frequency units are determined, the granularity of the channel grids is considered, and the granularity of the first channel grid corresponding to the first frequency unit is set to be smaller, so that the flexibility of deployment of the first frequency unit is improved.

Description

[0001] This application is a divisional application. The application number of the original application is 202210114704.6, and the original application date is January 30, 2022. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a communication method, apparatus, device and storage medium. Background Art

[0003] With the widespread application of machine-type communication (MTC) and Internet of Things (IoT) communications. By supporting radio frequency identification (RFID) and wake-up receiver or wake-up radio (WUR) and other technologies in some communication systems, such as Long Term Evolution (LTE) systems and New Radio (NR) systems, the cost and power consumption of IoT applications can be reduced. In order to meet this demand, how to apply RFID and WUR technologies to various communication systems is an urgent problem to be solved. Regardless of the technology, for communication between devices, it is necessary to first determine the frequency unit used for communication. Summary of the invention

[0004] A communication method, apparatus, device, and storage medium provided in the embodiments of the present application provide a solution for determining a frequency unit for communication between devices.

[0005] In a first aspect, an embodiment of the present application provides a communication method, the method comprising: a first device determines a first frequency unit; the first device communicates with a second device on the first frequency unit; wherein the granularity of a first channel grid corresponding to the first frequency unit is less than or equal to the granularity of a second channel grid corresponding to the second frequency unit, the second frequency unit is used for communication between the first device and the third device, and the first frequency unit and the second frequency domain unit are located in the same working frequency band.

[0006] Through the communication method provided in the first aspect, when the first device communicates with different devices, a first frequency unit for the first device to communicate with the second device is determined, and the first frequency unit and the second frequency unit for the first device and the third device to communicate are located in the same working frequency band, and the granularity of the first channel grid corresponding to the first frequency unit is less than or equal to the granularity of the second channel grid. On the one hand, the embodiment of the present application provides a solution for determining the frequency unit, so that the first device and the second device can communicate through the first frequency unit; on the other hand, when determining the frequency unit, considering the granularity of the channel grid, the granularity of the first channel grid corresponding to the first frequency unit can be set smaller, thereby improving the flexibility of the deployment of the first frequency unit.

[0007] The first device communicates with other devices by sending signals or receiving signals.

[0008] In a possible implementation, the frequency position of the first channel grid within the first frequency unit corresponds to the frequency position of a resource element within the first frequency unit, and the index of the resource element in the frequency domain is determined according to the transmission bandwidth of the first frequency unit or the transmission bandwidth of the second frequency unit.

[0009] The communication method provided in this embodiment facilitates the first device to determine the frequency position of the resource element corresponding to the first channel grid.

[0010] In a possible implementation manner, a boundary between a resource block of the first frequency unit and a resource block of the second frequency unit is aligned, or a boundary between a subcarrier of the first frequency unit and a subcarrier of the second frequency unit is aligned.

[0011] Through the communication method provided by this implementation, the RB of the first frequency unit should be aligned with the RB boundary of the second frequency unit to avoid resource fragmentation and reduce spectrum utilization efficiency; the subcarriers of the first frequency unit can be aligned with the subcarrier boundary of the second frequency unit to avoid interference with data transmission within the transmission bandwidth of the second frequency unit due to non-orthogonality of the subcarriers.

[0012] In one possible implementation, the first frequency unit is included in the transmission bandwidth of the second frequency unit, and the resource block of the first frequency unit is aligned with the resource block boundary of the second frequency unit; or, the first frequency unit is included in the protection band of the second frequency unit, and the subcarrier of the first frequency unit is aligned with the subcarrier boundary of the second frequency unit; or, the first frequency unit is not included in the second frequency unit, the frequency domain interval between the first frequency unit and the second frequency unit is less than a threshold, and the subcarrier of the first frequency unit is aligned with the subcarrier boundary of the second frequency unit.

[0013] Through the communication method provided by this implementation, when the first frequency unit is included in the transmission bandwidth of the second frequency unit, the RB of the first frequency unit should be aligned with the RB boundary of the second frequency unit, which can avoid resource fragmentation and reduce spectrum utilization efficiency; and when the first frequency unit is not included in the transmission bandwidth of the second frequency unit, the subcarriers of the first frequency unit can be aligned with the subcarrier boundaries of the second frequency unit, which can avoid interference with data transmission within the transmission bandwidth of the second frequency unit due to non-orthogonality of the subcarriers.

[0014] In a possible implementation, the granularity of the first channel grid is determined according to at least one of the following: a deployment mode of the first frequency unit; a subcarrier spacing of the first frequency unit.

[0015] Through the communication method provided by this embodiment, the granularity of the first channel grid is determined according to the deployment mode of the first frequency unit and / or the subcarrier spacing of the first frequency unit, so that the granularity of the first channel grid can be suitable for current communication. For example, while satisfying the flexibility of the deployment of the first frequency unit, the granularity of the first channel grid does not need to be set too small.

[0016] In a possible implementation, within the same operating frequency band, the granularity of the second channel grid is 100 kHz, and the granularity of the first channel grid is an integer multiple of 5 kHz, 10 kHz or 20 kHz.

[0017] The communication method provided by this implementation can improve the flexibility of the deployment of the first frequency unit.

[0018] In a possible implementation manner, the radio frequency reference frequency F corresponding to the first frequency unit REF Satisfaction: F REF =F REF-Offs +ΔF Global (N REF –N REF-Offs )+offset; where F REF-Offs is the RF reference frequency offset value, ΔF Global is the granularity of the global channel grid, N REF N is the new radio frequency channel number NR-ARFCN, REF-Offs is the NR-ARFCN offset value, offset is the frequency offset, and the value of offset is one of {-50, -45, -40, -35, -30, -25, -20, -15, -10, -5, 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50} kHz.

[0019] Through the communication method provided in this embodiment, the radio frequency reference frequency is determined based on the offset value as above, so as to achieve the determination of the smaller first channel grid granularity, thereby improving the flexibility of the first frequency unit deployment.

[0020] In a possible implementation, the first frequency unit includes an uplink frequency unit for transmitting an uplink signal, and / or a downlink frequency unit for transmitting a downlink signal; the first device determines the first frequency unit, including: the first device determines the uplink frequency unit according to the uplink frequency position and the uplink offset; and / or the first device determines the downlink frequency domain unit according to the downlink frequency position and the downlink offset; before the first device determines the first frequency unit, it includes: the first device determines the uplink offset and / or the downlink offset according to at least one of the frequency band type of the downlink frequency unit, the first capability of the second device, the type of the second device, the time domain resource type of the signal carried by the downlink frequency unit, and the time domain resource type of the signal carried by the uplink frequency unit, wherein the first capability is whether to support frequency shifting of the uplink signal to an uplink transmission band outside the downlink transmission band where the downlink frequency unit is located.

[0021] Through the communication method provided by this implementation, the first device determines the first frequency unit based on the uplink offset and / or downlink offset to avoid the situation where the subcarriers of the first frequency unit are not aligned with the subcarrier boundaries of other communication systems (such as LTE systems) (that is, the subcarriers are not orthogonal), which causes mutual interference in data transmission between the communication systems.

[0022] In one possible implementation, the downlink frequency unit is located in the downlink transmission frequency band, the first capability is to support frequency shifting of the uplink signal to an uplink transmission frequency band outside the downlink transmission frequency band, and the uplink offset is the first value or the second value; or, the first capability is to not support frequency shifting of the uplink signal to an uplink transmission frequency band outside the downlink transmission frequency band, and the uplink offset is the first value; or, the downlink frequency unit is located in the uplink transmission frequency band, and the downlink offset and the uplink offset are both the first value or the second value.

[0023] Through the communication method provided by this implementation, when the second device supports moving the uplink signal to the uplink transmission frequency band, the uplink carrier of other communication systems (such as the LTE system) may be in the same transmission frequency band. In this case, it is necessary to determine the uplink offset as the second value (that is, the first frequency unit needs to be offset) or the first value (that is, the first frequency unit does not need to be offset) to avoid misalignment of the subcarrier boundaries between the two.

[0024] In a possible implementation manner, the downlink transmission frequency band and the uplink transmission frequency band are located in the same working frequency band.

[0025] The communication method provided by this implementation is more suitable for determining an uplink offset and / or a downlink offset in an FDD mode.

[0026] In a possible implementation manner, the downlink transmission frequency band and the uplink transmission frequency band are located in different working frequency bands.

[0027] Through the communication method provided in this embodiment, for a scenario where the downlink transmission frequency band and the uplink transmission frequency band are not paired transmission frequency bands in the FDD mode, an uplink offset and / or a downlink offset is determined.

[0028] In a possible implementation manner, the uplink transmission frequency band is used for LTE uplink communication, and the uplink offset is the second value; or, the uplink transmission frequency band is not used for LTE uplink communication, and the uplink offset is the first value.

[0029] Through the communication method provided by this implementation, when the uplink transmission frequency band is used for LTE uplink communication, the first frequency unit needs to be offset to achieve subcarrier boundary alignment with the frequency unit of the LTE system. When the uplink transmission frequency band is not used for LTE uplink communication, there is no problem of subcarrier boundary alignment between the first frequency unit and the frequency unit of the LTE system, and no offset is required.

[0030] In a possible implementation, the first frequency unit is located in the TDD working frequency band, the downlink signal occupies downlink time domain resources, and the uplink signal occupies uplink time domain resources, and the downlink offset and the uplink offset are both the first value or the second value; or the downlink signal and the uplink signal both occupy downlink time domain resources, and the downlink offset and the uplink offset are both the first value; or the downlink signal and the uplink signal both occupy uplink time domain resources, and the downlink offset and the uplink offset are both the first value or the second value.

[0031] Through the communication method provided by this implementation, when the uplink signal carried by the uplink frequency unit and the uplink signal of other communication systems (such as LTE system) may be transmitted on the uplink time domain resources, it is necessary to further determine whether the first frequency unit needs to be frequency offset based on the uplink / downlink offset to avoid misalignment of subcarrier boundaries between the first frequency unit and the frequency units of other communication systems.

[0032] In a possible implementation, the uplink time domain resource is used for LTE uplink communication, and the downlink offset and the uplink offset are second values; or, the uplink time domain resource is not used for LTE uplink communication, and the downlink offset and the uplink offset are first values.

[0033] Through the communication method provided by this implementation, when it is determined that the uplink time domain resources are used for LTE uplink communication, it is determined that the first frequency unit needs to be frequency offset based on the uplink / downlink offset to avoid misalignment of the subcarrier boundaries of the first frequency unit and the LTE frequency unit. Otherwise, no frequency offset is required.

[0034] In a possible implementation manner, the first value is 0, and the second value is 7.5 kHz.

[0035] In the communication method provided by this implementation, the uplink offset / downlink offset is 0, indicating that the first frequency unit does not need to be offset based on the uplink offset / downlink offset; when the first frequency unit does not need to be offset based on the uplink offset / downlink offset, the uplink offset / downlink offset is 7.5kHz, which can ensure that the first frequency unit is aligned with the subcarrier boundary of the LTE system.

[0036] In a possible implementation, the method further includes: the first device receiving first configuration information, where the first configuration information is used to indicate one of the following: the uplink offset; the downlink offset; and the frequency domain interval between the downlink frequency position and the uplink frequency position.

[0037] The communication method provided by this embodiment reduces the system overhead of the first device.

[0038] In a possible implementation, the second frequency unit is located in an uplink transmission frequency band, the uplink frequency unit in the first frequency unit is located within the transmission bandwidth of the second frequency unit, and the downlink frequency unit in the first frequency unit is located within the protection band of the second frequency unit; or, the second frequency unit is located in a downlink transmission frequency band, the downlink frequency unit is located within the transmission bandwidth of the second frequency unit, and the uplink frequency unit is located within the protection band of the second frequency unit; or, the first frequency unit is located in a TDD operating frequency band, the downlink signal transmitted by the downlink frequency unit and the uplink signal corresponding to the downlink signal transmitted by the uplink frequency unit both occupy downlink time domain resources, the downlink frequency unit is located within the transmission bandwidth of the second frequency unit, and the uplink frequency unit is located within the protection band of the second frequency unit; or, the first frequency unit is located in a TDD operating frequency band, the downlink signal transmitted by the downlink frequency unit and the uplink signal corresponding to the downlink signal transmitted by the uplink frequency unit both occupy uplink time domain resources, the downlink frequency unit is located within the protection band of the second frequency unit, and the uplink frequency unit is located within the protection band of the second frequency unit.

[0039] Through the communication method provided by this implementation, for various scenarios where there may be problems with different transmission and reception directions, the downlink frequency unit and the uplink frequency unit in the first frequency unit are respectively deployed in the transmission bandwidth or protection band of the second frequency unit, so as to avoid the problem of signal interference between the first frequency unit and the second frequency unit due to different transmission and reception directions.

[0040] In a possible implementation, the method further includes: the first device sending first configuration information to the second device, the first configuration information being used to indicate at least one of: the uplink offset; the frequency domain interval between the downlink frequency position and the uplink frequency position; the uplink frequency unit.

[0041] Through the communication method provided by this implementation, on the one hand, the first device can flexibly configure the second device while reducing the system overhead of the second device; on the other hand, the first device provides the second device with parameters that cannot be determined under its own capabilities, so as to facilitate communication between the second device and the first device.

[0042] In a second aspect, an embodiment of the present application provides a communication device, which can perform each step in the above-mentioned first aspect. For example, the communication device may include: a processing unit, which is used to determine a first frequency unit; a transceiver unit, which is used to communicate with a second device on the first frequency unit; wherein the granularity of the first channel grid corresponding to the first frequency unit is less than or equal to the granularity of the second channel grid corresponding to the second frequency unit, the second frequency unit is used for the communication device to communicate with a third device, and the first frequency unit and the second frequency domain unit are located in the same working frequency band.

[0043] The beneficial effects of the communication device provided by the second aspect and each possible implementation manner of the second aspect can be referred to the beneficial effects brought about by the first aspect and each possible implementation manner of the first aspect, and will not be repeated here.

[0044] In a third aspect, an embodiment of the present application provides a communication device, comprising: a processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory, and executing the method in the first aspect or each possible implementation method.

[0045] In a fourth aspect, an embodiment of the present application provides a chip, comprising: a processor, configured to call and execute computer instructions from a memory, so that a device equipped with the chip executes a method as in the first aspect or any possible implementation manner.

[0046] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium for storing computer program instructions, wherein the computer program enables a computer to execute a method as in the first aspect or any possible implementation manner.

[0047] In a sixth aspect, an embodiment of the present application provides a computer program product, comprising computer program instructions, which enable a computer to execute a method as in the first aspect or any possible implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A communication system applicable to an embodiment of the present application is shown;

[0049] Figure 2a A schematic diagram of an RFID communication system provided for this application;

[0050] Figure 2b A schematic diagram of a RFID communication system with a separated architecture provided in the present application;

[0051] Figure 2c A schematic diagram of a centralized RFID communication system provided in this application;

[0052] Figure 3a A schematic diagram of WUR communication provided for this application;

[0053] Figure 3b A schematic diagram of another WUR communication provided for this application;

[0054] Figure 4 A schematic diagram of envelope detection provided for this application;

[0055] Figure 5 A schematic diagram of a reflection communication provided by this application;

[0056] Figure 6 A schematic diagram of a common resource block provided for this application;

[0057] Figure 7 A schematic diagram of the frequency domain position relationship between a partial bandwidth and a carrier provided in the present application;

[0058] Figure 8 A schematic diagram of an interaction flow of a communication method 400 provided in an embodiment of the present application;

[0059] Figure 9a A schematic diagram of a frequency unit deployment mode provided in an embodiment of the present application;

[0060] Figure 9b A schematic diagram of another frequency unit deployment mode provided in an embodiment of the present application;

[0061] Fig.9c A schematic diagram of another frequency unit deployment mode provided in an embodiment of the present application;

[0062] Fig.10 A schematic diagram of a frequency unit provided in an embodiment of the present application;

[0063] Fig.11 An interactive flow chart of a communication method 500 provided in an embodiment of the present application;

[0064] Fig.12a A schematic diagram of uplink / downlink transmission in FDD mode provided in an embodiment of the present application;

[0065] Figure 12b A schematic diagram of another FDD mode uplink / downlink transmission provided in an embodiment of the present application;

[0066] Fig.12c A schematic diagram of another FDD mode uplink / downlink transmission provided in an embodiment of the present application;

[0067] Fig.13a A schematic diagram of a TDD mode uplink / downlink transmission provided in an embodiment of the present application;

[0068] Fig.13b A schematic diagram of another TDD mode uplink / downlink transmission provided in an embodiment of the present application;

[0069] Fig.13c A schematic diagram of another TDD mode uplink / downlink transmission provided in an embodiment of the present application;

[0070] Fig.14a A schematic diagram of an uplink / downlink frequency unit deployment mode provided in an embodiment of the present application;

[0071] Fig.14b A schematic diagram of another uplink / downlink frequency unit deployment mode provided in an embodiment of the present application;

[0072] Fig.14c A schematic diagram of another uplink / downlink frequency unit deployment mode provided in an embodiment of the present application;

[0073] Fig.14d A schematic diagram of another uplink / downlink frequency unit deployment mode provided in an embodiment of the present application;

[0074] Fig.15 is a schematic block diagram of a communication device provided in an embodiment of the present application;

[0075] Fig.16 It is another schematic block diagram of the communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0076] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0077] The communication method provided in the present application can be applied to various communication systems, such as: Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-based access to unlicensed spectrum, LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WIFI), fifth-generation communication (5th-Generation, 5G) system or other communication systems.

[0078] The terminal device can be a station (STATION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a next-generation communication system such as an NR network, or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0079] In the embodiment of the present application, the terminal device can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self driving, a wireless terminal device in remote medical, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home, etc.

[0080] As an example but not a limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be called wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories.

[0081] In an embodiment of the present application, the network device may be a device for communicating with a mobile device. The network device may be an access point (AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (EvolutionalNode B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and a network device or base station (gNB) in an NR network, or a network device in a future evolved PLMN network, or a network device in an NTN network, etc.

[0082] In an embodiment of the present application, the network device can provide services for a cell, and the terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell can be a cell corresponding to the network device (for example, a base station), and the cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0083] It should be understood that the present application does not limit the specific forms of the network device and the terminal device.

[0084] To facilitate understanding of the embodiments of the present application, first Figure 1 A communication system applicable to an embodiment of the present application is described in detail. Figure 1 A schematic diagram of a communication system applicable to the communication method of an embodiment of the present application is shown. Figure 1 As shown, the communication system 100 may include a network device and a terminal device, and the number of the network device and the terminal device may be one or more, for example Figure 1 In the communication system 100, the network device 111 can communicate with one or more of the terminal devices 121 to 126 through a wireless air interface, and the network device 111 can communicate with one or more of the terminal devices 127 and 128 through the network device 112. In addition, the terminal devices 124 to 126 can constitute the communication system 101, in which the terminal device 124 can communicate with one or more of the terminal devices 125 and 126 through a wireless air interface, and the network device 112 and the terminal devices 127 and 128 can constitute the communication system 102, in which the network device 112 can communicate with one or more of the terminal devices 127 and 128 through a wireless air interface.

[0085] It should be understood that the communication system 101 may be a subsystem of the communication system 100 , or a communication system independent of the communication system 100 ; the communication system 102 may be a subsystem of the communication system 100 , or a communication system independent of the communication system 100 .

[0086] It should also be understood that Figure 1For example only, two network devices and eight terminal devices in the communication system 100, three terminal devices in the communication system 101, and one network device and two terminal devices in the communication system 102 are shown. However, this should not constitute any limitation to the present application. Any of the above communication systems may include more or fewer network devices, or include more or fewer terminal devices. The embodiments of the present application do not limit this.

[0087] With the popularization of 5G NR system MTC and Internet of Things (IoT) communications, more and more IoT devices have been deployed in people's lives. For example: smart water meters, shared bicycles, and devices for sensing and data collection such as smart cities, environmental monitoring, smart homes, and forest fire prevention. In the future, IoT devices will be ubiquitous and may be embedded in every piece of clothing, every package, and every key. Almost all offline items will be online with the empowerment of IoT technology.

[0088] In order to further popularize IoT and implant IoT modules into the human body or smaller objects, it is necessary to use smaller batteries or even completely get rid of the battery limitations, or design a method to reduce the power consumption of radio transceivers to overcome the cost, size, power consumption and other limitations of IoT devices. Therefore, passive IoT and WUR are introduced in the 5G NR system. Passive IoT is inspired by the current large-scale and mature use of RFID technology. Because the power module is omitted, the volume of passive RFID products can reach the centimeter level or even smaller, and the structure itself is simple, the cost is low, the failure rate is low, and the service life is long.

[0089] The RFID technology and WUR technology are first explained below.

[0090] 1. RFID technology: It is a contactless automatic identification technology that can automatically identify target objects and obtain relevant data through radio frequency signals.

[0091] Typically, an RFID system consists of a reader and a tag. Figure 2a As shown, the reader charges the tag by sending an excitation signal to the tag, and the tag receives the signal sent by the reader and sends a reflected signal to the reader in a reflection communication manner. In this way, the reader can identify the tag's identity document (ID) and perform operations such as reading and writing the tag.

[0092] It should be noted that the excitation signal sent by the reader to the tag may be a downlink signal or one of the downlink signals hereinafter, and the reflection signal may be an uplink signal or one of the uplink signals hereinafter. The tag sends the reflection signal to the reader in the form of reflection communication, and specifically, the tag uses the carrier provided by the downlink signal to transmit the uplink signal.

[0093] At present, in order to extend the effective working distance of RFID, the following two methods are usually used:

[0094] Method 1: Separate architecture: Combination Figure 2b As shown, the separated reader includes a helper and a receiver. The helper sends an excitation signal to the tag through the forward link, and the receiver receives the reflected signal from the tag through the reverse link. In addition, the receiver generates RFID-related downlink signaling and sends the downlink signaling to the helper through the forward link, which is then forwarded by the helper on the forward link.

[0095] Method 2: Centralized or integrated architecture: Combination Figure 2c As shown, in addition to the excitation and reflection of signals between the reader and the tag through the forward link and the reverse link, the reader also communicates with a centralized control unit (such as a base station), which can schedule and control the forward link resources and sending behavior used by the reader.

[0096] In an embodiment of the present application, in order to support RFID in the NR system, the helper and the receiver in the above-mentioned method 1, and the reader and the centralized control unit in the above-mentioned method 2 can communicate through NR technology.

[0097] 2. WUR technology: The high-power primary connection radio (PCR), also known as the main receiver, enters the sleep state and monitors the wake-up frame sent by the AP through the low-power companion radio (Companion Radio), also known as the wake-up receiver (WUR), and wakes up the PCR after monitoring the wake-up frame.

[0098] Combination Figure 3a As shown, the receiving end device 310 is deployed with a main receiver 311 and a wake-up receiver 312. When the transmitting end device 320 (such as an AP or a terminal device) does not send data, the main receiver is turned off, also known as being in a dormant state, and the wake-up receiver is turned on; Figure 3bAs shown, when the transmitting device 320 sends data, it first sends wake-up data (such as the above-mentioned wake-up frame). After the receiving device 310 receives the wake-up data through the wake-up receiver 311, it activates the main receiver 312, turning on the main receiver, which is also called being in an activated state. At this time, the receiving device 310 receives the data sent by the transmitting device 320 after the wake-up data through the main receiver 311.

[0099] It should be noted that the information bits of the wake-up machine are modulated into on-off keying (OOK) symbols. On the receiving device side, OOK demodulation does not require any channel equalization in the frequency domain and time domain, so the receiving device monitors by waking up the receiver for non-coherent detection (such as envelope detection). Using non-coherent detection, the receiving device does not need to maintain / track a high-precision oscillation rate. Therefore, the phase-locked loop can be avoided, further reducing the power consumption on the receiving side.

[0100] It should be understood that the OOK symbol is merely an example of a WUR wake-up frame and does not constitute any limitation to the present application.

[0101] For the RFID technology used in the NR system, for example, it can be called passive IoT. The transmission mechanism of the Passive IoT provided in this application is similar to that of RFID. In Passive IoT, Passive IoT devices (such as tags) can be passive (Batter Free), that is, the Passive IoT device itself is not equipped with or does not rely mainly on batteries or wired power supplies for power. However, the fact that the Passive IoT device does not have a power module does not mean that electricity is not required. The Passive IoT device can obtain energy from ambient light, heat, and radio frequency, thereby supporting the perception, wireless transmission, and distributed computing of IoT data. Passive IoT devices can also be energy storage passive or semi-passive. Energy storage passive devices have energy storage devices. Semi-passive devices have batteries, but battery power is only for auxiliary support of the circuits in the tag that require power to maintain data or the voltage required for the tag chip to work. The tag circuit itself consumes very little power, and the battery size is relatively small.

[0102] refer to Figure 4 and Figure 5 , Figure 4 and Figure 5 The following is a schematic diagram showing an uplink and downlink communication method in Passive IoT communication.

[0103] like Figure 4 As shown, Figure 4 A schematic diagram of a Passive IoT downlink communication method is shown as an example.

[0104] The tag sends an amplitude modulated signal to the reader via a downlink. The tag receives the amplitude modulated signal and uses an envelope detector to perform envelope detection on the amplitude modulated signal to obtain the low-frequency signal. The main components of the envelope detector include Figure 4 The diode and resistor-capacitance circuit (RC) shown is an oscillator circuit.

[0105] Understandably, Figure 4 The envelope detection circuit shown is a schematic diagram of the most traditional basic circuit structure, and the evolution structure of the envelope detection circuit is not described here. The embodiment of the present application does not limit the envelope detection circuit structure used by the tag.

[0106] like Figure 5 As shown, Figure 5 A schematic diagram of a Passive IoT uplink communication method is shown as an example.

[0107] The tag itself cannot provide power, nor can it be connected to a wired power source for data transmission. Therefore, the tag needs to obtain energy from the external environment to provide the tag with data transmission, data processing and other operations.

[0108] Specifically, when the tag receives the carrier signal sent by the reader, it can use the energy obtained from the electromagnetic field generated in the space to drive the chip to transmit the information stored in it.

[0109] Understandably, Figure 5 The uplink communication method in the Passive IoT communication shown is only an example. In other embodiments of the present application, the tag can also drive the chip to transmit the information stored in itself by obtaining energy such as ambient light and heat. As mentioned above, the tag can also be an energy storage passive device or a semi-passive device.

[0110] It should be understood that Passive IoT is merely an exemplary name, and when it is replaced by other expressions, it also falls within the scope of protection of this application.

[0111] It should also be understood that the information interaction process and signaling format in the above-mentioned Passive IoT scenario are merely examples rather than restrictive descriptions.

[0112] At present, in order to enable RFID, WUR or similar technologies to be applied to various communication systems, how to determine the frequency unit in the NR system between the first devices (such as readers, APs, and sending terminal devices) and transmit uplink data or downlink data on the frequency unit is a problem that needs to be solved urgently.

[0113] In response to the above problems, an embodiment of the present application provides a scheme for determining a frequency unit, so that the first device and the second device can communicate in an NR system, an LTE system, or other similar communication systems. Of course, the scheme for determining the frequency unit provided in the present application is not limited to the above-mentioned RFID, WUR or similar technologies. Regardless of the technology, for communication between devices, the frequency unit used for communication can be determined based on the scheme provided in the embodiment of the present application.

[0114] Furthermore, in an embodiment of the present application, the frequency units for communication between the first device and different devices (for example, a first frequency unit for communicating with the second device and a second frequency unit for communicating with the third device) are located in the same working frequency band. When determining the frequency units, the granularity of the channel grid is considered, such as setting the granularity of the first channel grid corresponding to the first frequency unit to be smaller, thereby improving the flexibility of frequency unit deployment.

[0115] To facilitate understanding of the embodiments of the present application, the terms involved in the present application are first briefly explained.

[0116] 1. Working frequency band:

[0117] In 5G NR, two frequency ranges are defined, including frequency range (FR) 1 and FR2. FR1 represents the low frequency band, and FR2 represents the millimeter wave high frequency band.

[0118] For example, NR can work in the working frequency band FR1 as shown in Table 1 below. FR1 includes multiple working frequency bands of NR. Each working frequency band has a corresponding number, a lower frequency boundary and an upper frequency boundary of uplink transmission (for example, transmission from a terminal to a base station), a lower frequency boundary and an upper frequency boundary of downlink transmission (for example, transmission from a base station to a terminal), and a duplex mode. As shown in Table 1, the working frequency band numbered n1 has a lower frequency boundary F for uplink transmission. UL_low The upper frequency boundary F of uplink transmission is 1920MHz. UL_high The lower frequency boundary of downlink transmission is 1980MHz. DL_low The upper frequency boundary of downlink transmission is 2110MHz. DL_high It is 2170MHz, and the duplex mode it adopts is frequency division duplexing (FDD); as shown in Table 1, the working frequency band numbered n39 has a lower frequency boundary of 1880MHz for uplink transmission and a lower frequency boundary of 1920MHz for downlink transmission, and a duplex mode it adopts is time division duplexing (TDD).

[0119] Table 1

[0120]

[0121]

[0122] In addition to the above-mentioned duplex modes of FDD and TDD, the duplex mode adopted by NR may also include supplementary downlink (SDL) as shown in Table 1, which is used to increase the downlink coverage of NR, and supplementary uplink (SUL) which is used to increase the uplink coverage of NR. Both SDL and SUL are independent non-paired working frequency bands.

[0123] 2. Numerology: In the NR system, in order to adapt to OFDM waveforms with various subcarrier spacings, numerology is introduced so that the subcarrier spacing is not limited and can be adapted according to different usage scenarios.

[0124] The transmission parameter sets supported by the NR system are shown in Table 2:

[0125] Table 2

[0126] μ <![CDATA[Δf=2 μ ·15[kHz]]]> Cyclic prefix 0 15 Normal 1 30 normal 2 60 normal, extended 3 120 normal 4 240 normal

[0127] Wherein, Δf is the subcarrier spacing, and μ is an integer greater than or equal to 0.

[0128] 2. Antenna port: The antenna port is defined so that the channel of a symbol transmitted on the antenna port can be inferred from the channel of another symbol transmitted on the same antenna port. In other words, the channel environment experienced by different signals transmitted on the same antenna port is the same.

[0129] 3. Resource grid: A resource grid corresponds to a parameter set and a carrier. The resource grid includes subcarriers and OFDM symbols, where Indicates the number of resource blocks (RBs) in a resource grid when the subcarrier spacing is configured as μ. Indicates the number of subcarriers in an RB. Optional. consecutive subcarriers.

[0130] It will be appreciated that there is one set of resource grids per transmission direction (uplink or downlink).For a given antenna port p, subcarrier spacing configuration μ, and transmission direction (downlink or uplink), there is one resource grid.

[0131] The starting resource block of the resource grid is a common resource block (CRB).

[0132] 4. Resource element (RE): Each element in the resource grid for antenna port p and subcarrier spacing configuration μ is called a resource element and is represented by (k, l) p,μ Unique identifier, where k is the index of the RE in the frequency domain and l is the position of the RE symbol in the time domain relative to a reference point. Resource element (k, l) p,μ Corresponds to a physical resource and complex value When there is no risk of aliasing, or when no specific antenna port or subcarrier spacing is specified, the indices p and μ may be dropped, resulting in or a k,l .

[0133] 5. Common resource blocks: For subcarrier spacing configuration μ, common resource blocks are numbered upwards from 0 in the frequency domain. The center frequency of subcarrier 0 of common resource block 0 with subcarrier spacing configuration μ coincides with the common reference point A of the resource grid, see Figure 6 .

[0134] 6. Physical resource blocks: A physical resource block with a subcarrier spacing of μ is defined within a bandwidth part (BWP).

[0135] 7. BWP: For a given parameter set μ in BWP i on a given carrier i , BWP is a subset of continuous CRBs. The frequency position relationship between BWP and carrier can be as follows Figure 7 shown.

[0136] In general, a terminal device can be configured with up to four BWPs in the downlink, with one downlink BWP being active at a given time; a terminal device can be configured with up to four BWPs in the uplink, with one uplink BWP being active at a given time. If a terminal device is configured with a supplementary uplink, the terminal device can additionally configure up to four bandwidth portions in the supplementary uplink, with a single supplementary uplink BWP being active at a given time.

[0137] 8. Global frequency raster

[0138] In the NR system, the global frequency grid defines a set of radio frequency (RF) reference frequencies F REF RF reference frequencies are used in signaling to identify the location of RF channels, synchronization signal (SS) blocks, and other elements. A global frequency grid is defined for all frequencies from 0 to 100 GHz. The granularity of the global frequency grid is ΔF Global .

[0139] When the frequency range is 0-24250MHz, the RF reference frequency is specified by the NR absolute radio frequency channel number (NR-ARFCN) in the range (0 to 2016666) on the global frequency grid. NR-ARFCN and RF reference frequency F REF The relationship between (MHz) is given by the following equation, where F REF-Offs and N Ref-Offs As shown in Table 3, N REF It is NR-ARFCN.

[0140] F REF =F REF-Offs +ΔF Global (N REF –N REF-Offs )

[0141] Table 3

[0142]

[0143] 9. Channel Grid

[0144] In NR systems, the channel grid defines a subset of RF reference frequencies that can be used to identify the location of RF channels in uplink and downlink transmissions. The RF reference frequency of an RF channel is mapped to a resource element on the carrier. For each operating frequency band, a subset of frequencies from the global frequency grid is applied to the frequency band and forms a granularity of ΔF. Raster channel grid, which may be equal to or greater than ΔFGlobal. For example, for an NR operating band with a 100kHz channel grid, ΔF Raster=20×ΔFGlobal, such as working bands n1, n2, etc. For the channel grid of each working band in the NR system and the applicable NR-ARFCN, refer to Table 5.4.2.3-1 in 3GPP TS38.101-1V17.3.0, and for the NR-ARFCN allowed on band n46 and band n47, refer to Table 5.4.2.3-2 and Table 5.4.2.3-3 in 3GPP TS38.101-1V17.3.0, respectively. Considering the space limitation, the following Table 4 is only an excerpt of the above Table 5.4.2.3-1.

[0145] Table 4

[0146]

[0147] The mapping between the RF reference frequency and the corresponding resource element on the channel grid can be seen in Table 5 below. Based on the mapping relationship shown in Table 5, the RF channel position can be determined. This mapping depends on the total number of resource blocks (RBs) N allocated in the RF channel. RB , for example, N allocated in the RF channel RB is an even number, then the RF channel is located in the physical resource block numbered The resource element with resource element index k=0, or N allocated in the RF channel RB is an odd number, then the RF channel is located at the physical resource block index On the resource element with resource element index k=6.

[0148] The mapping relationship between the RF reference frequency and the resource element is applicable to the uplink (UL) and downlink (DL) of the NR system.

[0149] Table 5

[0150]

[0151] Here, a mod b represents the remainder when a is divided by b.

[0152] To facilitate understanding of the embodiments of the present application, the following points are explained:

[0153] First, in the embodiments shown below, the first, second and various digital numbers are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application. For example, to distinguish different devices, frequency units, channel grids, etc.

[0154] Second, the "protocol" involved in the embodiments of the present application may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, which is not limited in the present application.

[0155] Third, in the embodiments of the present application, descriptions such as "when...", "in the case of...", "if" and "if" all mean that under certain objective circumstances, the device (such as a network device or a terminal device) will make corresponding processing, which does not limit the time, and does not require the device (such as a network device or a terminal device) to have a judgment action when implementing it, nor does it mean that there are other limitations.

[0156] The side transmission method provided in the embodiment of the present application will be described in detail below with reference to the accompanying drawings.

[0157] It should be understood that the following is only for the sake of understanding and explanation, and the method provided in the embodiment of the present application is described in detail by taking the interaction between the first device and the second device as an example.

[0158] The first device may be, for example, the above-mentioned tag, or a terminal device equipped with a tag-related device (or having a tag-related function); the second device may be the above-mentioned reader, or a terminal device equipped with a reader-related device (or having a reader-related function), or a network device equipped with a reader-related device. When the first device is a terminal device equipped with a tag-related device and the second device is a terminal device equipped with a reader-related device, the first device may be Figure 1 The terminal device 125 or 126 in the second device may be Figure 1 When the first device is a terminal device with a tag and the second device is a network device with a reader, the first device may be Figure 1 Any one of the terminal devices 121 to 123 in the second device may be Figure 1 The network device 111 in, or the first device may be Figure 1 The terminal device 127 or 128 in the second device may be Figure 1 The network device 112 in.

[0159] The first device may be, for example, the above-mentioned wake-up machine, or a terminal device equipped with a wake-up machine, and the second device may be, for example, a network device (such as a base station, AP, etc.) or a terminal device. When the first device is a terminal device equipped with a wake-up machine, and the second device is a terminal device, the first device may be Figure 1 The terminal device 125 or 126 in the second device may be Figure 1 When the first device is a terminal device with a wake-up machine deployed, and the second device is a network device, the first device may be Figure 1 Any one of the terminal devices 121 to 123 in the second device may be Figure 1 The network device 111 in, or the first device may be Figure 1The terminal device 127 or 128 in the second device may be Figure 1 The network device 112 in.

[0160] The embodiment of the present application also includes a third device, and the first device communicates with the second device and the third device using different frequency units. The third device can be a network device or a terminal device, which is not limited in the present application.

[0161] However, it should be understood that this should not constitute any limitation on the execution subject of the method provided in the present application. As long as it is possible to run a program that records the code of the method provided in the embodiment of the present application, according to the method provided in the embodiment of the present application, it can be used as the execution subject of the method provided in the embodiment of the present application. For example, the first device shown in the following embodiment can also be replaced by a component in the first device, such as a chip, a chip system, or other functional modules that can call a program and execute a program. The second device can also be replaced by a component in the second device, such as a chip, a chip system, or other functional modules that can call a program and execute a program. The third device can also be replaced by a component in the third device, such as a chip, a chip system, or other functional modules that can call a program and execute a program.

[0162] Figure 8 Schematic diagram of an interactive process of a communication method 400 provided in an embodiment of the present application. Figure 8 As shown, the method 400 may include some or all of the steps in S410-1, S410-2, S420-1 and S420-2. Each step in the method 400 is described in detail below.

[0163] S410-1, the first device determines a first frequency unit;

[0164] S410-2, the second device determines a first frequency unit;

[0165] S420-1, the first device sends a downlink signal to the second device at the first frequency unit; correspondingly, the second device receives the downlink signal from the first device at the first frequency unit;

[0166] S420-2, the second device sends an uplink signal to the first device in the first frequency unit; correspondingly, the first device receives the uplink signal from the second device in the first frequency unit.

[0167] In other words, the first device determines that the first frequency unit is used to communicate with the second device. The communication may be sending a signal or receiving a signal.

[0168] The present application does not limit the execution order of the above S410-1 and S410-2. When the second device needs to determine the first frequency unit according to the configuration of the first device, the above S410-2 can be executed before S410-1.

[0169] The above S420-1 and S420-2 may be performed one by one or in sequence, for example, after receiving the downlink signal sent by the first device, the second device sends an uplink signal to the first device, so as to enable the first device and the second device to communicate on the first frequency unit.

[0170] Among them, the granularity of the first channel grid corresponding to the first frequency unit is less than or equal to the granularity of the second channel grid corresponding to the second frequency unit, the second frequency unit is used for communication between the first device and the third device, and the first frequency unit and the second frequency domain unit are located in the same working frequency band.

[0171] The first frequency unit can be a carrier or a BWP. For example, when the first device and the second device communicate based on Passive IoT technology, the first frequency unit can be a carrier configured for Passive IoT (referred to as Passive IoT carrier); for another example, when the first device and the second device communicate based on WUR technology, the first frequency unit can be a carrier configured for WUR (referred to as WUR carrier). The above-mentioned Passive IoT carrier and WUR carrier can be the same carrier or different carriers.

[0172] The first frequency unit may be a frequency unit for uplink transmission, such as an uplink frequency unit; or the first frequency unit may be a frequency unit for downlink transmission, such as a downlink frequency unit; or the first frequency unit includes a frequency unit for uplink transmission and a frequency unit for downlink transmission, in other words, the first frequency unit includes an uplink frequency unit and a downlink frequency unit. In some embodiments, the uplink frequency unit and the downlink frequency unit may be the same frequency unit, that is, the first frequency unit is a frequency unit for both uplink transmission and downlink transmission.

[0173] When the first frequency unit is an uplink frequency unit, the above S420-2 may include that the first device receives an uplink signal from the second device on the uplink frequency unit, and correspondingly, the second device sends an uplink signal to the first device on the uplink frequency unit; when the first frequency unit is a downlink frequency unit, the above S420-1 may include that the first device sends a downlink signal to the second device on the downlink frequency unit, and correspondingly, the second device receives the downlink signal from the first device on the downlink frequency unit; when the first frequency unit includes an uplink frequency unit and a downlink frequency unit, the first device sends a downlink signal to the second device on the downlink frequency unit of the first frequency unit, and receives the uplink signal from the second device on the uplink frequency unit of the first frequency unit.

[0174] When the first frequency unit is a WUR carrier, the downlink signal may be, for example, a wake-up signal, and the first device may send the wake-up signal to the second device in the downlink frequency unit.

[0175] When the first frequency unit is a Passive IoT carrier, the downlink signal may be a carrier signal, or the downlink signal may be downlink signaling and / or data, and the uplink signal may be a reflection signal based on the carrier signal. For example, the first device sends a carrier signal to the second device in the downlink frequency unit, and receives a reflection signal sent by the second device in the uplink frequency unit based on the carrier signal in a reflection communication manner. In this case, the carrier signal sent by the first device and the reflection signal sent by the second device overlap in the time domain.

[0176] The difference between the above-mentioned carrier signal and downlink signaling / data is that the carrier signal is used to provide a carrier for uplink reflection, or can provide energy for passive tags, and the waveform corresponding to the carrier signal can be a sine wave or a cosine wave at a given frequency, or the waveform corresponding to the carrier signal is not modulated by amplitude and / or phase, or the waveform corresponding to the carrier signal is modulated by amplitude and / or phase, but the overall amplitude is not enough to be interpreted as transmission data by the receiving side. The waveform corresponding to the downlink signaling / data is modulated by amplitude and / or phase, and the overall amplitude is enough to be interpreted as transmission data by the receiving side.

[0177] It can be understood that, before the second device communicates with the first device, the second device may determine the first frequency unit or obtain the first frequency unit from first configuration information sent by the first device.

[0178] The second frequency unit may also be a carrier, for example, the second frequency unit may be an NR carrier configured in the NR system. Similar to the first frequency unit, the second frequency unit may be a frequency unit for uplink transmission, or a frequency unit for downlink transmission, or include a frequency unit for uplink transmission and a frequency unit for downlink transmission.

[0179] In the case where the first frequency unit includes an uplink frequency unit and a downlink frequency unit, the first frequency unit and the second frequency unit are located in the same working frequency band, which may mean that: the uplink frequency unit in the first frequency unit and the second frequency unit are located in the same working frequency band; or the downlink frequency unit in the first frequency unit and the second frequency unit are located in the same working frequency band; or the uplink frequency unit, the downlink frequency unit, and the second frequency unit in the first frequency unit are all located in the same working frequency band.

[0180] In the case where the first frequency unit includes an uplink frequency unit and a downlink frequency unit, and the second frequency unit includes a frequency unit for uplink transmission and a frequency unit for downlink transmission, the first frequency unit and the second frequency unit being located in the same working frequency band may include at least one of the following examples:

[0181] Example 1: The uplink frequency unit in the first frequency unit and the frequency unit used for uplink transmission in the second frequency unit are located in the same working frequency band; Example 2: The downlink frequency unit in the first frequency unit and the frequency unit used for downlink transmission in the second frequency unit are located in the same working frequency band; Example 3: The uplink frequency unit in the first frequency unit and the frequency unit used for downlink transmission in the second frequency unit are located in the same working frequency band; Example 4: The downlink frequency unit in the first frequency unit and the frequency unit used for uplink transmission in the second frequency unit are located in the same working frequency band.

[0182] When the first frequency unit and the second frequency unit are located in the same working frequency band and include at least 3 of the above examples 1 to 4, it means that the uplink frequency unit and the downlink frequency unit of the first frequency unit, and the frequency unit for uplink transmission and the frequency unit for downlink transmission in the second frequency unit are all located in the same working frequency band.

[0183] Assuming that the communication method 400 is applied to an NR communication system, the working frequency bands where the first frequency unit and the second frequency unit are located may be, for example, the NR working frequency bands in the aforementioned Table 1. For example, both the first frequency unit and the second frequency unit may be deployed in the working frequency band corresponding to n1.

[0184] Optionally, the first frequency unit may have different deployment modes. Figures 9a to 9c As shown, the second frequency unit (eg, NR carrier) includes a transmission bandwidth (eg, NR transmission bandwidth) and a protection band (eg, NR protection band), and the transmission bandwidth of the second frequency unit includes N RB RBs, such as RB#0 to RB#N RB-1 The first frequency unit may be deployed, for example, within the transmission bandwidth of the second frequency unit, and the first frequency unit may occupy one or more RBs in the second frequency unit, such as Figure 9aThe first frequency unit occupies RB#1 in the second frequency unit; or the first frequency unit can be deployed in the protection band of the second frequency unit, see Figure 9b ; or the frequency domain interval between the first frequency unit and the second frequency unit is less than the threshold, see Fig.9c . Combined Figures 9a to 9c It can be seen that the resource element corresponding to the first channel grid of the first frequency unit in the first frequency unit can be the resource element in the middle of the first frequency unit, and the index of the RB where the resource element is located can satisfy the formula in Table 5 Where N R ' B is the number of RBs included in the transmission bandwidth of the first frequency unit; the resource element corresponding to the second channel grid of the second frequency unit in the second frequency unit may be a resource element in the middle of the second frequency unit, and the index of the RB where the resource element is located may satisfy the formula in Table 5

[0185] With respect to the relative position relationship between the first frequency unit and the second frequency unit in the frequency domain, the frequency domain resource relationship between the first frequency unit and the second frequency unit also includes the following three possible examples.

[0186] In the first example, when the first frequency unit is deployed within the transmission bandwidth of the second frequency unit, in order to avoid resource fragmentation and reduce spectrum utilization efficiency, the RB of the first frequency unit should be aligned with the RB boundary of the second frequency unit.

[0187] In the second example, when the first frequency unit is deployed in the protection band of the second frequency unit, the subcarriers of the first frequency unit can be aligned with the subcarrier boundaries of the second frequency unit to avoid interference with data transmission within the transmission bandwidth of the second frequency unit due to non-orthogonality of the subcarriers. In this case, the frequency domain resources occupied by the first frequency unit do not overlap with the transmission bandwidth of the second frequency unit, and the misalignment of the boundaries between the RB of the first frequency unit and the RB of the second frequency unit will not affect the spectrum utilization efficiency of the second frequency unit. Therefore, it is not necessary to limit whether the boundaries between the RB of the first frequency unit and the RB of the second frequency unit are aligned.

[0188] In the third example, when the frequency domain interval between the first frequency unit and the second frequency unit is less than a threshold, similar to the above second example, the subcarriers of the first frequency unit can be aligned with the subcarrier boundary of the second frequency unit, and there is no limitation on whether the RB of the first frequency unit and the RB of the second frequency unit are aligned with each other.

[0189] The deployment mode of the first frequency unit in the second example and the third example described above may be referred to as deployment outside the transmission bandwidth hereinafter.

[0190] The frequency position of the first channel grid in the first frequency unit corresponds to the frequency position of a resource element in the first frequency unit. The index of the position of the resource element in the frequency domain can be determined through the following two examples.

[0191] Example 1: The index of the position of the resource element in the frequency domain can be determined according to the transmission bandwidth of the first frequency unit. As shown in Table 5, assuming that the transmission bandwidth of the first frequency unit includes N' RB RB, in N' RB is an odd number (i.e. N' RB mod2=1), the resource element index is 6 and the physical resource block index is In N' RB is an even number (i.e. N' RB mod2=0), the resource element index is 0 and the physical resource block index is For example, Figure 9a The frequency position corresponding to the first channel grid is the physical resource block index The resource element has an index of 6.

[0192] Example 2: The index of the position of the resource element in the frequency domain may be based on the transmission bandwidth N of the second frequency unit. RB As shown in Table 5, the transmission bandwidth of the first frequency unit includes N RB RBs, in N RB is an odd number (i.e. N RB mod2=1), the resource element index is 6 and the physical resource block index is In N' RB is an even number (i.e. N RB mod2=0), the resource element index is 0 and the physical resource block index is

[0193] It can be understood that the above example one is applicable to the scenarios in the above first example, the second example or the third example, that is, when the first frequency unit is deployed within the transmission bandwidth of the second frequency unit, within the protection band of the second frequency unit, or when the frequency domain interval between the first frequency unit and the second frequency unit is less than the threshold, the first device can determine the position of the first channel grid in the corresponding resource element based on the transmission bandwidth of the first frequency unit, that is, determine the first frequency unit; the above example two is generally applicable to the scenario in the above first example, that is, when the first frequency unit is deployed within the transmission band of the second frequency unit, the first device can consider determining the position of the resource element corresponding to the first channel grid based on the transmission bandwidth of the second frequency unit, that is, determine the first frequency unit. The following will further explain the scenarios in the above first example, the second example and the third example, the determination method of the first frequency unit in the above examples one and two, and the granularity of the channel grid, so as to achieve more flexible deployment of the first frequency unit while ensuring spectrum utilization efficiency and avoiding subcarrier non-orthogonality.

[0194] In an embodiment of the present application, the granularity of the first channel grid corresponding to the first frequency unit and the granularity of the channel grid corresponding to the second frequency unit may be the same or different. In an embodiment of the present application, the granularity of the first channel grid is less than or equal to the granularity of the second channel grid, so as to avoid reducing the flexibility of the deployment of the first frequency unit due to the excessive granularity of the first channel grid.

[0195] Continuing with the first example above, combined with Fig.10 , based on the situation that the granularity of the first channel grid and the granularity of the second channel grid are the same, the flexibility of the deployment of the first frequency unit is explained.

[0196] like Fig.10 As shown, the number of RBs occupied by the second frequency unit (eg, NR carrier) is N RB Can be an odd number, or N RB mod 2 = 1, for example, the transmission bandwidth of the second frequency unit in (a) includes the number of RBs N RB =2N+1; or the number of RBs occupied by the second frequency unit N RB Can be an even number, or N RB mod 2 = 0, for example, the transmission bandwidth of the second frequency unit in (b) includes the number of RBs N RB =2N. The arrow position is the frequency position of the second frequency unit, that is, the frequency position of a resource element in the second frequency unit corresponding to the frequency position of the second channel grid. For example, the transmission bandwidth of the second frequency unit includes the number of RBs N. RB =2N+1, the frequency position of the second channel grid corresponds to RE#6 in RB#N; for another example, the transmission bandwidth of the second frequency unit includes RB number NRB =2N, the frequency position of the second channel grid corresponds to RE#0 in RB#N.

[0197] like Fig.10 As shown, the number of RBs occupied by the first frequency unit is N' RB It can also be an odd number, or N′ RB mod 2=1, for example, the transmission bandwidth of the first frequency unit in (c) includes the number of RBs N' RB =2M+1; or the number of RBs occupied by the first frequency unit N' RB is an even number, or N′ RB mod 2 = 0, for example, the transmission bandwidth of the first frequency unit in d includes the number of RBs N' RB =2M. The arrow position is the frequency position of the first frequency unit, that is, the frequency position of a resource element in the first frequency unit corresponding to the frequency position of the first channel grid. For example, the transmission bandwidth of the first frequency unit includes the number of RBs N' RB =2M+1, the frequency position of the first channel grid corresponds to RE#6 in RB#M; for another example, the transmission bandwidth of the first frequency unit includes the number of RBs N RB =2M, the frequency position of the first channel grid corresponds to RE#0 in RB#M.

[0198] The above M and N are both positive integers. Generally speaking, M is less than or equal to N.

[0199] Fig.10 As shown in (a), (b), (c), and (d) in FIG. 1 , four scenarios regarding the parity of the number of RBs occupied by the first frequency unit and the second frequency unit can be obtained. RB and N' RB Parity is consistent: if the second frequency unit is shown in (a) and the first frequency unit is shown in (c), or if the second frequency unit is shown in (b) and the first frequency unit is shown in (d); or N RB and N' RB Parity is inconsistent: for example, the second frequency unit is shown in (a) and the first frequency unit is shown in (d), or the second frequency unit is shown in (b) and the first frequency unit is shown in (c).

[0200] Based on the above four scenarios, taking the subcarrier spacing of 15kHz, the first channel grid and the second channel grid are both 100kHz, and the RB bandwidth of 180kHz as an example, while ensuring that the RB of the first frequency unit and the RB of the second frequency unit are aligned, the possible value f of the frequency corresponding to the first channel grid pAs shown in the following Table 6. Wherein, k, n, and m are all integers, k*100 is the frequency corresponding to the second channel grid, and m*180 represents a bandwidth of an integer multiple of RBs.

[0201] Table 6

[0202]

[0203] As shown in Table 6, assuming that within the transmission bandwidth of the second frequency unit, the index of the middle resource block (RB) is 0, the index of the RB with a frequency higher than the RB is a positive value, and the index of the RB with a frequency lower than the RB is a negative value, when the transmission bandwidth of the second frequency unit is consistent with the parity of the transmission bandwidth of the first frequency unit, only some limited RB positions in the second frequency unit can be used to deploy the first frequency unit. Wherein, m represents the index of the RB. When N RB and N' RB When the parity is consistent, m = 0, ±5, ±10, ±15, ... means that the middle RB in the transmission bandwidth of the second frequency unit can be used to deploy the first frequency unit, and the position every 5 RBs can be used to deploy the first frequency unit. RB and N' RB When the parity is inconsistent, a frequency position that can be used to deploy the first frequency unit cannot be found within the NR carrier.

[0204] In some embodiments, the method provided in the aforementioned example two can be used to determine the index of the position of the one resource element in the frequency domain according to the transmission bandwidth of the second frequency unit, so as to avoid the situation where the first frequency unit cannot be configured when the number of RBs included in the transmission bandwidth of the first frequency unit and the number of RBs included in the transmission bandwidth of the second frequency unit are inconsistent in parity, or in other words, to avoid the situation where the number of RBs included in the transmission bandwidth of the first frequency unit and the number of RBs included in the transmission bandwidth of the second frequency unit are inconsistent in parity, resulting in the RB boundary of the first frequency unit and the RB boundary of the second frequency unit being misaligned when the first frequency unit is configured.

[0205] However, as shown in Table 6 above, even if the number of RBs included in the transmission bandwidth of the first frequency unit is not equal to or equal to the number of RBs included in the transmission bandwidth of the second frequency unit, the frequency position in the second frequency unit that can be used to configure the first frequency unit is also very limited. In order to further improve the deployment flexibility of the first frequency unit, this embodiment considers further reducing the granularity of the first channel grid.

[0206] For example, combined with the above Table 6, f pThe value of m in the formula is 0, 1, 2, 3, etc., and the value of n is tried. The deviation between k*100±m*180 or k*100±(m*180+90) and n*100 is calculated, and the deviation is 0, ±10, ±20, ±30, ±40, ±50 (kHz). In order to enable the first frequency unit to be deployed at any RB position in the second frequency unit, the first channel grid can be set to 10kHz.

[0207] It should be understood that the above-mentioned first channel grid of 10kHz is only an example and does not constitute any limitation to the present application. When the granularity of the first channel grid is smaller than the granularity of the second channel grid, various values ​​of the granularity of the first channel grid can improve the flexibility of the deployment of the first frequency unit, for example, the granularity of the first channel grid can also be 5kHz, 20kHz, etc.

[0208] For example, in Fig.10 In the four scenarios formed by combining (a), (b), (c), and (d), taking the subcarrier spacing of 30kHz, the first channel grid and the second channel grid are both 100kHz, and the RB bandwidth of 180kHz as an example, while ensuring that the RB boundaries of the first frequency unit and the RB boundaries of the second frequency unit are aligned, the possible values ​​of the frequency corresponding to the first channel grid are shown in Table 7 below.

[0209] Table 7

[0210]

[0211] Combined with Table 7, further analysis shows that the frequency f corresponding to the first channel grid is p The deviations of the possible values ​​from the integer multiples of 100kHz are 0, ±20, ±40 (kHz). In order to allow the first frequency unit to be deployed at any RB position within the second frequency unit, the granularity of the first channel grid can be set to 20kHz. Of course, the first channel grid can also be set to 10kHz or 5kHz.

[0212] When the subcarrier spacing is 60kHz, the frequency f corresponding to the first channel grid is p The deviations of the possible values ​​of from the integer multiples of 100kHz are the same as when the subcarrier spacing is 30kHz, that is, when the subcarrier spacing is 60kHz, the granularity of the first channel grid can also be 5kHz, 10kHz or 20kHz.

[0213] In some embodiments, the parity of the number of RBs included in the transmission bandwidth of the first frequency unit is consistent with the parity of the number of RBs included in the transmission bandwidth of the second frequency unit. For example, the first device can determine the number of RBs included in the transmission bandwidth of the first frequency unit according to the parity of the number of RBs included in the transmission bandwidth of the second frequency unit, so that the parity of the number of RBs included in the transmission bandwidth of the first frequency unit is consistent with the parity of the number of RBs included in the transmission bandwidth of the second frequency unit. This improves the flexibility of the deployment of the first frequency unit.

[0214] Above Fig.10 In the examples related to Table 6, the scenario of the first example above, that is, the first frequency unit is deployed within the transmission bandwidth of the second frequency unit, is mainly used as an example for explanation. The following will be described by taking the scenario of the second example or the third example above, that is, the first frequency unit is deployed within the protection band of the second frequency unit, or the frequency domain interval between the first frequency unit and the second frequency unit is less than the threshold as an example.

[0215] As mentioned before, when the first frequency unit is deployed in the protection band of the second frequency unit, or the frequency domain interval between the first frequency unit and the second frequency unit is less than a threshold, the subcarrier boundaries of the first frequency unit and the subcarrier boundaries of the second frequency unit are aligned, which can avoid interference with data transmission within the transmission bandwidth of the second frequency unit due to the non-orthogonality of the first frequency unit and the second frequency unit.

[0216] Assuming that the granularity of the first channel grid and the granularity of the second channel grid are both 100 kHz, and the subcarrier spacing is 15 kHz, the available frequency positions that satisfy the channel grid being an integer multiple of 100 kHz are analyzed as shown in Table 8 below.

[0217] Table 8

[0218]

[0219]

[0220] See Table 8, which only takes the transmission bandwidth of the NR carrier as 5MHz and 10MHz as an example to show the analysis results. Assuming that within the transmission bandwidth of the second frequency unit, the frequency corresponding to the RB at the middle RB position is 0Hz, the frequency of the RB with a higher frequency than this RB is a positive value, and the frequency of the RB with a lower frequency than this RB is a negative value, it can be seen from Table 8 that the f that satisfies the integer multiple of 100kHz is p Very limited, for example, only when the transmission bandwidth of the second frequency unit is 5 MHz and the number of RBs included in the transmission bandwidth of the first frequency domain unit is an even number, f p = ±4800 (kHz), the first frequency unit can be deployed. When the transmission bandwidth of the second frequency unit is other values, a similar method can be used to calculate fp Due to space limitations, we will not list them all here. Sampling in a similar way, the conclusion is that when the transmission bandwidth of the second frequency unit is other values, f p The frequency positions that are integer multiples of 100 kHz are also very limited, that is, the positions where the first frequency unit can be deployed are very limited.

[0221] Further analysis shows that the frequency f corresponding to the first channel grid shown in Table 8 above and the frequency f corresponding to the first channel grid not shown in Table 8 but calculated in a similar manner is p The possible values ​​of the first channel grid correspond to the frequency f p The deviations from integer multiples of 100kHz are 0, ±5, ±10, ±15, ±20, ±25, ±30, ±35, ±40, ±45, ±50 (kHz). In order to enable the first frequency unit to be deployed at any position within the protection band of the second frequency unit, the granularity of the first channel grid can be 5kHz. Table 9 takes the second frequency unit as an NR carrier as a possible example. Due to space limitations, only the working frequency bands n1, n2, n3 and n5 are listed in the table. It should be understood that for other working frequency bands with a granularity of 100kHz for the second channel grid (such as the NR channel grid), the granularity of the first channel grid of 5kHz is also applicable.

[0222] Table 9

[0223]

[0224] For reasons similar to those above, when the subcarrier is 30kHz, the frequency f corresponding to the first channel grid is p The deviation from the integer multiple of 100kHz is 0, ±10, ±20, ±30, ±40, ±50 (kHz). In this case, the granularity of the first channel grid can be 10kHz, or 5kHz. For a subcarrier spacing of 60kHz, the frequency f corresponding to the first channel grid p The deviation from the integer multiple of 100kHz is 0, ±20, ±40 (kHz). In this case, the granularity of the first channel grid can be 20kHz, and of course it can also be 5kHz or 10kHz.

[0225] Based on Tables 6 to 9 and the related examples above, the granularity of the first channel grid is related to the deployment mode of the first frequency unit and at least one of the subcarrier spacing of the first frequency unit. Based on this, the first device can determine the granularity of the first channel grid according to the deployment mode of the first frequency unit and at least one of the subcarrier spacing of the first frequency unit.

[0226] It should be noted that the subcarrier spacing of the first frequency unit may be the subcarrier spacing agreed upon by the first frequency unit, or the subcarrier spacing configured in the first frequency unit.

[0227] For example, the correspondence between the channel grid of the first frequency unit and the subcarrier spacing of the first frequency unit may include:

[0228] 1) The subcarrier spacing is 15kHz and the channel grid is 5kHz;

[0229] 2) The subcarrier spacing is 30kHz and the channel grid is 10kHz;

[0230] 3) The subcarrier spacing is 60kHz and the channel grid is 20kHz.

[0231] For another example, the correspondence between the channel grid of the first frequency unit, the subcarrier spacing of the first frequency unit, and the deployment mode of the first frequency unit may include:

[0232] 1) Subcarrier spacing is 15kHz, deployed within the transmission bandwidth, and the channel grid is 10kHz;

[0233] 2) Subcarrier spacing is 15kHz, deployed outside the transmission bandwidth, and the channel grid is 5kHz;

[0234] 3) Subcarrier spacing is 30kHz, deployed within the transmission bandwidth, and the channel grid is 20kHz;

[0235] 4) Subcarrier spacing is 30kHz, deployed outside the transmission bandwidth, and the channel grid is 10kHz;

[0236] 5) Subcarrier spacing is 60kHz, deployed within the transmission bandwidth, and the channel grid is 20kHz;

[0237] 6) Subcarrier spacing is 60kHz, deployed outside the transmission bandwidth, and the channel grid is 20kHz;

[0238] The above correspondence may be predefined or preconfigured, and the first device may determine the granularity of the first channel grid according to the above correspondence; or, the granularity of the first channel grid may be a predefined value, such as an integer multiple of 5kHz, 10kHz or 20kHz.

[0239] In some embodiments, the RF reference frequency F corresponding to the first frequency unit REF Satisfaction: F REF =F REF-Offs +ΔF Global (N REF –N REF-Offs )+offset; where F REF-Offs is the RF reference frequency offset value, ΔF Globalis the granularity of the global channel grid, N REF For NR-ARFCN, N REF-Offs is the NR-ARFCN offset value, and offset is the frequency offset.

[0240] Among them, F REF-Offs and N REF-Offs The value of can be found in Table 10 below:

[0241] Table 10

[0242] Frequency range(MHz) <![CDATA[ΔF Global (kHz)]]> <![CDATA[F REF-Offs (MHz)]]> <![CDATA[N REF-Offs ]]> <![CDATA[N REF Scope]]> 0–3000 5 0 0 0–599999 3000–24250 15 3000 600000 600000–2016666

[0243] Exemplarily, the value of offset is one of {-50, -45, -40, -35, -30, -25, -20, -15, -10, -5, 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50} kHz.

[0244] Exemplarily, for the first device, the first frequency unit may be determined by the first device, or the first frequency unit may be obtained by the first device from the second configuration information received by the fourth device; for the second device, the first frequency unit may be determined by the second device, or the first frequency unit may be obtained by the second device from the first configuration information sent by the first device. Optionally, the fourth device may be a network device, such as a base station, a macro base station, etc.

[0245] Therefore, in an embodiment of the present application, when the first device communicates with a different device, a first frequency unit for communication between the first device and the second device is determined, and the first frequency unit and the second frequency unit for communication between the first device and the third device are located in the same working frequency band, and the granularity of the first channel grid corresponding to the first frequency unit is less than or equal to the granularity of the second channel grid. On the one hand, the embodiment of the present application provides a solution for determining the frequency unit, so that the first device and the second device can communicate through the first frequency unit; on the other hand, when determining the frequency unit, the granularity of the channel grid is considered, such as setting the granularity of the first channel grid corresponding to the first frequency unit to be smaller, thereby improving the flexibility of the deployment of the first frequency unit.

[0246] In some communication systems (such as LTE systems), in order to reduce the problem of direct current (DC) subcarrier performance degradation caused by local oscillator leakage on the network equipment side or the terminal equipment side, a DC subcarrier is reserved in the downlink frequency unit without sending information, and the uplink carrier is offset by half a subcarrier as a whole (such as 7.5kHz). In other communication systems (such as NR systems), the problem of DC subcarrier performance degradation caused by local oscillator leakage is handled by network equipment or terminal equipment, and no DC subcarrier is reserved in the downlink carrier, and the uplink carrier is not offset by half a subcarrier as a whole. When the above two communication systems (such as LTE systems and NR systems) share spectrum resources, the downlink frequency units of the two communication systems are not offset, so the subcarrier boundaries are aligned; however, one of the uplink frequency units in the two communication systems is offset by half a subcarrier, and the other uplink frequency unit is not offset, resulting in the two communication systems not being aligned due to the subcarrier boundaries (that is, the subcarriers are not orthogonal), which in turn causes interference between the communication systems during data transmission.

[0247] The following is an exemplary description of how to determine the first frequency unit in the above shared spectrum.

[0248] Fig.11 FIG. 5 is an interactive flow chart of a communication method 500 provided in an embodiment of the present application. Fig.11 As shown, the communication method 500 also includes some or all of the following steps:

[0249] S510, the first device determines an uplink offset and / or a downlink offset according to at least one of a frequency band type of the downlink frequency unit, a first capability of the second device, a type of the second device, a time domain resource type of a signal carried by the downlink frequency unit, and a time domain resource type of a signal carried by the uplink frequency unit;

[0250] S520-1, the first device determines an uplink frequency unit according to the uplink frequency position and the uplink offset;

[0251] S520-2, the second device determines an uplink frequency unit according to the uplink frequency position and the uplink offset;

[0252] S530-1, the first device determines a downlink frequency unit according to a downlink frequency position and a downlink offset;

[0253] S530-2, the second device determines a downlink frequency unit according to the downlink frequency position and the downlink offset;

[0254] S540-1, the first device sends a downlink signal to the second device in a downlink frequency unit; correspondingly, the second device receives the downlink signal from the first device in the downlink frequency unit;

[0255] S540-2, the second device sends an uplink signal to the first device in the uplink frequency unit; correspondingly, the first device receives the uplink signal from the second device in the uplink frequency unit.

[0256] This embodiment does not limit the execution order of the above S520-1, S520-2, S530-1 and S530-2.

[0257] The above S540 - 1 and S540 - 2 may be executed one by one or in sequence. For example, after the second device receives the downlink signal sent by the first device, it sends an uplink signal to the first device.

[0258] As mentioned above, the first frequency unit may include an uplink frequency unit for transmitting an uplink signal and / or a downlink frequency unit for transmitting a downlink signal. Figure 8 In the illustrated embodiment, S410-1, the first device determines the first frequency unit, which may include: S520-1, the first device determines the uplink frequency unit according to the uplink frequency position and the uplink offset, and / or, S530-1, the first device determines the downlink frequency unit according to the downlink frequency position and the downlink offset.

[0259] Among them, the uplink frequency position can be agreed upon by the protocol, or predefined in the first device, or preconfigured by the fourth device to the first device, and this application does not limit this. The downlink frequency position is similar to this and will not be repeated. In PassiveIoT, there is often a frequency domain interval between the uplink frequency position and the downlink frequency position, and the frequency domain interval can also be agreed upon by the protocol, or predefined in the first device, or preconfigured by the fourth device to the first device.

[0260] Based on this, in an embodiment of the present application, the first device can first determine the uplink offset and / or downlink offset based on the above S510, so that the first device can determine the first frequency unit based on the uplink offset / downlink offset to avoid the subcarrier boundaries between the communication systems in the shared spectrum from being misaligned, causing interference to data transmission.

[0261] The frequency band type where the downlink frequency unit is located may include, for example, an uplink transmission frequency band in FDD mode, a downlink transmission frequency band in FDD mode, an SDL transmission frequency band, a SUL transmission frequency band, a TDD transmission frequency band, etc. In the following, the uplink transmission frequency band and the SUL transmission frequency band in FDD mode are collectively referred to as the uplink transmission frequency band, and the downlink transmission frequency band and the SDL transmission frequency band in FDD mode are collectively referred to as the downlink transmission frequency band.

[0262] The first capability is whether the second device supports frequency shifting of an uplink signal to an uplink transmission frequency band outside the downlink transmission frequency band where the downlink frequency unit is located.

[0263] Exemplarily, in a Passive IoT scenario, the second device may be a tag. The type of the second device may include an active tag and a passive tag. In some examples, the type of the second device may reflect the first capability described above. For example, when the type of the second device is a passive tag, the second device does not have the capability of frequency shifting an uplink signal to an uplink transmission band outside the downlink transmission band where the downlink frequency unit is located.

[0264] The above-mentioned time domain resource types may include, for example, uplink time domain resources (eg, uplink time slots) and downlink time domain resources (eg, downlink time slots) in TDD mode.

[0265] The above S510 is described below through several examples:

[0266] 1. The first device determines the uplink offset and / or the downlink offset based on at least one of the frequency band type of the downlink frequency unit and the first capability of the second device (or the type of the second device):

[0267] One example is that the downlink frequency unit is located in the downlink transmission frequency band, and the second device supports frequency shifting of the uplink signal to an uplink transmission frequency band outside the downlink transmission frequency band, and the uplink offset is the first value or the second value; or, the downlink frequency unit is located in the downlink transmission frequency band, and the second device does not support frequency shifting of the uplink signal to an uplink transmission frequency band outside the downlink transmission frequency band, and the uplink offset is the first value.

[0268] It should be noted that whether the second device supports frequency shifting the uplink signal to an uplink transmission frequency band outside the downlink transmission frequency band may be indicated by the first capability of the second device, or may be determined by the type of the second device.

[0269] As mentioned above, the downlink transmission frequency band may be a downlink transmission frequency band or an SDL transmission frequency band in the FDD mode, and the uplink transmission frequency band may be an uplink transmission frequency band or an SUL transmission frequency band in the FDD mode.

[0270] It should be understood that when the downlink transmission band is the downlink transmission band in the FDD mode and the uplink transmission band is the uplink transmission band in the FDD mode, the downlink transmission band and the uplink transmission band are located in the same working band, for example, as shown in Table 1, the uplink transmission band is the uplink working band in the NR working band n1, and the downlink transmission band is the downlink working band in the NR working band n1. Among them, the NR working band n1 is only an example, which can be replaced by any working band corresponding to the FDD mode in Table 1, such as n2, n3...

[0271] Of course, the downlink transmission band and the uplink transmission band may not be paired transmission bands, or in other words, the uplink transmission band and the downlink transmission band may be located in different working bands, or in other words, the uplink transmission band and the downlink transmission band have different band numbers (such as n1, n2, n3, etc.). For example, the downlink transmission band is the downlink transmission band in the FDD mode, and the uplink transmission band is the SUL transmission band. For another example, the downlink transmission band is the downlink working band in the NR working band n1, and the uplink transmission band is the uplink working band in the NR working band n2.

[0272] Furthermore, the above-mentioned uplink transmission frequency band may be, for example, a spectrum shared with LTE. Then, when the uplink transmission frequency band is used for LTE uplink communication, in order to ensure that the subcarrier boundaries of the uplink frequency unit and the LTE frequency unit are aligned, the uplink offset is set to a second value, which may be, for example, 7.5kHz; when the above-mentioned uplink transmission frequency band is not used for LTE uplink communication, the uplink offset is the first value, which may be, for example, 0.

[0273] For example, it is assumed that the second frequency unit includes an NR uplink carrier for transmitting an NR uplink signal and / or an NR downlink carrier for transmitting an NR downlink signal, the first frequency unit includes a Passive IoT uplink carrier for transmitting a Passive IoT uplink signal and / or a Passive IoT downlink carrier for transmitting a Passive IoT downlink signal, and the first frequency unit is located in the shared spectrum of NR and LTE. Figure 12a to Figure 12b The above example is described below.

[0274] See also Fig.12a , the Passive IoT downlink carrier is located in the downlink transmission frequency band, and the second device supports frequency shifting the Passive IoT uplink signal to the uplink transmission band corresponding to the downlink transmission frequency band where the Passive IoT downlink carrier is located. In this case, the Passive IoT uplink carrier and the LTE uplink carrier are both located in the uplink transmission frequency band, then the uplink offset of the Passive IoT uplink carrier is 7.5kHz; of course, if it is determined that the uplink transmission frequency band is not used for LTE uplink communication, then the uplink offset can be 0. Optionally, the NR uplink carrier is similar to the Passive IoT uplink carrier, and the uplink offset of the NR uplink carrier is the same as the uplink offset of the Passive IoT uplink carrier.

[0275] See also Figure 12b, the Passive IoT downlink carrier is located in the downlink transmission frequency band, and the second device does not support frequency shifting of the Passive IoT uplink signal to an uplink transmission frequency band outside the downlink transmission frequency band where the Passive IoT downlink carrier is located. In this case, the Passive IoT uplink carrier is still located in the downlink transmission frequency band, and the downlink transmission frequency band is not used for LTE uplink communication, then the uplink offset of the Passive IoT uplink carrier is 0.

[0276] In the above example, the downlink frequency unit is located in the downlink transmission frequency band, and the downlink transmission frequency band is not used for uplink communication of LTE, so the downlink offset can be 0.

[0277] Another example is that the downlink frequency unit is located in the uplink transmission frequency band, and the downlink offset and the uplink offset are both the first value or the second value.

[0278] Furthermore, the above-mentioned uplink transmission frequency band may be, for example, a spectrum shared with LTE. Then, when the uplink transmission frequency band is used for LTE uplink communication, in order to ensure that the downlink frequency unit and the uplink frequency unit are aligned with the subcarrier boundaries of the frequency unit of LTE, the downlink offset and the uplink offset are both set to a second value, which may be, for example, 7.5kHz; when the above-mentioned uplink transmission frequency band is not used for LTE uplink communication, the downlink offset and the uplink offset are both set to a first value, which may be, for example, 0.

[0279] For example, it is still assumed that the second frequency unit includes an NR uplink carrier for transmitting an NR uplink signal and / or an NR downlink carrier for transmitting an NR downlink signal, the first frequency unit includes a Passive IoT uplink carrier for transmitting a Passive IoT uplink signal and / or a Passive IoT downlink carrier for transmitting a Passive IoT downlink signal, and the first frequency unit is located in the shared spectrum of NR and LTE. Fig.12c The above example is described below.

[0280] See also Fig.12c, the Passive IoT uplink carrier is located in the downlink transmission band. In this case, the Passive IoT downlink carrier and the Passive IoT uplink carrier are both located in the uplink transmission band with the LTE uplink carrier, then the downlink offset of the Passive IoT downlink carrier and the uplink offset of the Passive IoT uplink carrier are both 7.5kHz; of course, if it is determined that the uplink transmission band is not used for LTE uplink communication, the downlink offset and the uplink offset can both be 0. Optionally, the NR downlink carrier is located in the downlink transmission band, so the downlink offset of the NR downlink carrier can be 0; the NR uplink carrier is similar to the PassiveIoT uplink carrier, and the uplink offset of the NR uplink carrier is the same as the uplink offset of the Passive IoT uplink carrier.

[0281] 2. When the first frequency unit is located in the TDD working frequency band, the first device determines the uplink offset and the downlink offset based on the time domain resource type of the signal carried by the downlink frequency unit and the time domain resource type of the signal carried by the uplink frequency unit:

[0282] Example 1: The downlink signal carried by the downlink frequency unit occupies the downlink time domain resources, and the uplink signal carried by the uplink frequency unit occupies the uplink time domain resources, and the above-mentioned downlink offset and uplink offset are both the first value or the second value. For example, it is assumed that the second frequency unit includes an NR uplink carrier for transmitting an NR uplink signal and / or an NR downlink carrier for transmitting an NR downlink signal, and the first frequency unit includes a Passive IoT uplink carrier for transmitting a Passive IoT uplink signal and / or a Passive IoT downlink carrier for transmitting a Passive IoT downlink signal, and the first frequency unit is located in the shared spectrum of NR and LTE. Combined with Fig.13a As shown, the Passive IoT downlink signal is transmitted in the downlink time slot, and the Passive IoT uplink signal is transmitted in the uplink time slot. In this case, the Passive IoT uplink signal and the LTE uplink signal are both transmitted in the uplink time slot, and the uplink offset of the Passive IoT uplink carrier and the downlink offset of the Passive IoT downlink carrier are both 7.5kHz; of course, if it is determined that the uplink time slot is not used for LTE uplink communication, the uplink offset and the downlink offset can both be 0. Optionally, the NR uplink carrier is similar to the Passive IoT uplink carrier, and the uplink offset of the NR uplink carrier is the same as the uplink offset of the Passive IoT uplink carrier.

[0283] Example 2: When the downlink signal carried by the downlink frequency unit and the uplink signal carried by the downlink frequency unit both occupy downlink time domain resources, the above-mentioned downlink offset and uplink offset are both the first numerical values. It is still assumed that the second frequency unit includes an NR uplink carrier for transmitting an NR uplink signal and / or an NR downlink carrier for transmitting an NR downlink signal, and the first frequency unit includes a Passive IoT uplink carrier for transmitting a Passive IoT uplink signal and / or a Passive IoT downlink carrier for transmitting a Passive IoT downlink signal, and the first frequency unit is located in the shared spectrum of NR and LTE. Combined with Fig.13b As shown, both the Passive IoT downlink signal and the Passive IoT uplink signal are transmitted in the downlink time slot, and the downlink time slot is not used for LTE uplink communication, so the uplink offset of the Passive IoT uplink carrier and the downlink offset of the Passive IoT downlink carrier are both 0.

[0284] Example 3: When the downlink signal carried by the downlink frequency unit and the uplink signal carried by the uplink frequency unit both occupy uplink time domain resources, the above-mentioned downlink offset and uplink offset are both the first value or the second value. It is still assumed that the second frequency unit includes an NR uplink carrier for transmitting an NR uplink signal and / or an NR downlink carrier for transmitting an NR downlink signal, and the first frequency unit includes a Passive IoT uplink carrier for transmitting a Passive IoT uplink signal and / or a Passive IoT downlink carrier for transmitting a Passive IoT downlink signal, and the first frequency unit is located in the shared spectrum of NR and LTE. Combined with Fig.13c As shown, the Passive IoT downlink signal and the Passive IoT uplink signal are both transmitted in the uplink time slot. In this case, the Passive IoT uplink signal and the LTE uplink signal are both transmitted in the uplink time slot, and the uplink offset of the Passive IoT uplink carrier and the downlink offset of the Passive IoT downlink carrier are both 7.5kHz; if it is determined that the uplink time slot is not used for LTE uplink communication, the uplink offset and the downlink offset can both be 0. Optionally, the NR uplink carrier is similar to the Passive IoT uplink carrier, and the uplink offset of the NR uplink carrier is the same as the uplink offset of the Passive IoT uplink carrier.

[0285] Optionally, in any of the above examples, in a Passive IoT scenario, the downlink signal carried by the downlink frequency unit may be a carrier signal or downlink signaling / data.

[0286] It can be understood that the uplink offset of the uplink frequency unit can be the RF reference frequency (F RER), similarly, the downlink offset of the downlink frequency unit can be the offset of the RF reference frequency corresponding to the downlink frequency unit.

[0287] Exemplarily, the first device may determine the downlink frequency unit based on the downlink frequency position and the downlink offset. For example, the first device determines the downlink frequency unit according to the sum of the downlink frequency position and the downlink offset. The uplink offset may be a positive value or a negative value.

[0288] Exemplarily, the first device may determine the uplink frequency unit based on the uplink frequency position and the uplink offset, for example, the first device determines the uplink frequency unit according to the sum of the uplink frequency position and the uplink offset. Or the first device may determine the uplink frequency unit based on the downlink frequency position, the uplink offset, and the frequency domain interval between the uplink frequency position and the downlink frequency position, for example, the first device determines the uplink frequency unit according to the downlink frequency domain position, the uplink offset, and the sum of the frequency domain interval between the uplink frequency position and the downlink frequency position. The uplink offset may be a positive value or a negative value, and the frequency domain interval between the uplink frequency position and the downlink frequency position may be a positive value or a negative value.

[0289] The above-mentioned downlink frequency position, downlink offset, uplink frequency position, frequency domain interval between the uplink frequency position and the downlink frequency position with an uplink offset, wherein each frequency information can be determined by the first device, or can be configured by the fourth device to the first device, or can be defined by a protocol, so that the first device can determine the first frequency unit based on part or all of the frequency information.

[0290] Optionally, the fourth device may send second configuration information to the first device, where the second configuration information is used to indicate at least one of the following: a downlink frequency position, a downlink offset, an uplink frequency position, and a frequency domain interval between an uplink frequency position and a downlink frequency position.

[0291] For example, the first device may be implemented as a base station and the fourth device may be implemented as a macro base station, or the first device may be implemented as a terminal device and the fourth device may be implemented as a base station.

[0292] The second device may receive the first configuration information sent by the first device, and the second device may determine the first frequency unit according to the first configuration information.

[0293] In some embodiments, the first configuration information may indicate a downlink frequency unit, and the second device may receive a downlink signal from the first device on the downlink frequency unit.

[0294] In other embodiments, the first configuration information may indicate a frequency domain interval between a downlink frequency position and an uplink frequency position, a downlink frequency unit, and an uplink offset. The second device may determine the uplink frequency unit based on the frequency domain interval between the downlink frequency position and the uplink frequency position, the downlink frequency unit, and the uplink offset. For example, the second device may determine the uplink frequency unit based on the sum of the frequency domain interval between the downlink frequency position and the uplink frequency position, the downlink frequency unit, and the uplink offset.

[0295] In some further embodiments, the first configuration information may indicate an uplink frequency unit, and the second device may send an uplink signal to the first device on the uplink frequency unit.

[0296] It should be noted that part or all of the frequency information in the above-mentioned downlink frequency unit, uplink frequency unit, frequency domain interval between the downlink frequency position and the uplink frequency position, downlink frequency unit and uplink offset may also be defined by the protocol, or may be predefined in the second device. In this case, the first configuration information may not include part or all of the frequency information defined by the protocol and predefined in the second device.

[0297] In the above Fig.11 In the illustrated embodiment, the first device determines the first frequency unit based on the uplink offset and / or the downlink offset to avoid the situation where the subcarriers of the first frequency unit are not aligned with the subcarrier boundaries of other communication systems (e.g., LTE systems) (i.e., the subcarriers are not orthogonal), which causes interference between data transmissions of the communication systems.

[0298] As mentioned before, in the communication scenario of Passive IoT, on the one hand, since the uplink transmission of Passive IoT adopts reflection communication, that is, the second device receives the downlink carrier signal at the same time while sending the uplink reflected signal, then the uplink transmission signal and the downlink carrier signal overlap in the time domain, so that the uplink transmission signal and the downlink carrier signal may both be located in the uplink time domain resources of the TDD transmission frequency band or both are located in the downlink time domain resources of the TDD transmission frequency point; on the other hand, the second device has limited ability to frequency shift the uplink reflected signal relative to the downlink carrier signal. In other words, when the frequency shifting capability of the second device is low, the uplink frequency unit carrying the uplink signal and the downlink frequency unit carrying the downlink signal may both be located in the uplink transmission frequency band, or both are located in the downlink transmission frequency band. The above two aspects may cause signal interference problems due to the different directions of transmission and reception between Passive IoT and NR.

[0299] In view of the above problem, in this embodiment, it is considered to deploy the frequency unit with different transmission direction from the second frequency unit in the protection band to avoid the problem that the first frequency unit and the second frequency unit transmit and receive in different directions. Figures 14a to 14d .

[0300] See also Fig.14a The second frequency unit is a frequency unit for uplink transmission. In other words, the second frequency unit is located in the uplink transmission frequency band. In this case, the uplink frequency unit in the first frequency unit is in the same direction as the second frequency unit. The uplink frequency unit can be located within the transmission bandwidth of the second frequency unit. The downlink frequency unit in the first frequency unit is located within the protection band of the second frequency unit because it is in a different direction from the second frequency unit.

[0301] See also Fig.14b , the second frequency unit is a frequency unit for downlink transmission, in other words, the second frequency unit is located in the downlink transmission frequency band. The uplink frequency unit in the first frequency unit is in a different direction from the second frequency unit and can be located in the protection band of the second frequency unit, while the downlink frequency unit in the first frequency unit is in the same direction as the second frequency unit and can be located in the transmission bandwidth of the second frequency unit.

[0302] See also Fig.14c The first frequency unit is located in the TDD working frequency band, the downlink signal transmitted by the downlink frequency unit and the uplink signal corresponding to the downlink signal transmitted by the uplink frequency unit both occupy downlink time domain resources, the downlink frequency unit is located within the transmission bandwidth of the second frequency unit, and the uplink frequency unit is located within the protection band of the second frequency unit.

[0303] See also Fig.14d The first frequency unit is located in the TDD working frequency band, the downlink signal transmitted by the downlink frequency unit and the uplink signal corresponding to the downlink signal transmitted by the uplink frequency unit both occupy uplink time domain resources, the downlink frequency unit is located in the protection band of the second frequency unit, and the uplink frequency unit is located in the protection band of the second frequency unit.

[0304] In this embodiment, for various scenarios where there may be problems with different transmission and reception directions, the downlink frequency unit and the uplink frequency unit in the first frequency unit are respectively deployed in the transmission bandwidth or the protection band of the second frequency unit to avoid signal interference between the first frequency unit and the second frequency unit due to different transmission and reception directions.

[0305] Above, combined Figures 8 to 14d The method provided by the embodiment of the present application is described in detail. Figure 15 to Figure 16 The device provided in the embodiments of the present application is described in detail.

[0306] Fig.15 is a schematic block diagram of a communication device provided in an embodiment of the present application. Fig.15 As shown, the device 600 may include: a transceiver unit 610 and a processing unit 620 .

[0307] Optionally, the communication device 600 may correspond to the first device in the above method embodiment, for example, may be the first device, or a component configured in the first device (such as a chip or a chip system, etc.).

[0308] It should be understood that the communication device 600 may correspond to the communication device according to the embodiment of the present application. Figure 8 and Fig.11 In the method shown in the first device, the communication device 600 may include a device for performing Figure 8 and Fig.11 The units of the method performed by the first device in the method. In addition, the units in the communication device 600 and the above-mentioned other operations and / or functions are respectively for implementing Figure 8 and Fig.11 The corresponding process of the method in .

[0309] The communication device 600 may include a transceiver unit 610 and a processing unit 620 . The transceiver unit 610 performs processing related to information transmission and reception, and the processing unit 620 performs other processing except information transmission and reception.

[0310] For example, when the communication device 600 is used to perform Figure 8 and Fig.11 When using the method in, the processing unit 620 can be used to determine a first frequency unit; the transceiver unit 610 can be used to communicate with a second device on the first frequency unit; wherein the granularity of the first channel grid corresponding to the first frequency unit is less than or equal to the granularity of the second channel grid corresponding to the second frequency unit, the second frequency unit is used for communication between the communication device and the third device, and the first frequency unit and the second frequency domain unit are located in the same working frequency band.

[0311] The communication device 600 may also correspond to the second device in the above method embodiment, for example, may be the second device, or a component configured in the second device (such as a chip or a chip system, etc.).

[0312] The transceiver unit 610 in the communication device 600 may be implemented by a transceiver, for example, corresponding to Fig.16 The transceiver 710 in the communication device 700 shown in FIG. 6 , the processing unit 620 in the communication device 600 may be implemented by at least one processor, for example, corresponding to Fig.16 The processor 720 in the communication device 700 shown in FIG.

[0313] When the communication device 600 is a chip or a chip system configured in a communication device (such as a first device or a second device), the transceiver unit 610 in the communication device 600 can be implemented through an input / output interface, circuit, etc., and the processing unit 620 in the communication device 600 can be implemented through a processor, microprocessor or integrated circuit integrated on the chip or chip system.

[0314] Fig.16 is another schematic block diagram of a communication device provided in an embodiment of the present application. Fig.16 As shown, the communication device 700 may include: a transceiver 710, a processor 720 and a memory 730. The transceiver 710, the processor 720 and the memory 730 communicate with each other through an internal connection path, the memory 730 is used to store instructions, and the processor 720 is used to execute the instructions stored in the memory 730 to control the transceiver 710 to send signals and / or receive signals.

[0315] It should be understood that the communication device 700 may correspond to the first device or the second device in the above method embodiment, and may be used to execute the various steps and / or processes performed by the first device or the second device in the above method embodiment. Optionally, the memory 730 may include a read-only memory and a random access memory, and provide instructions and data to the processor. A portion of the memory may also include a non-volatile random access memory. The memory 730 may be a separate device or may be integrated in the processor 720. The processor 720 may be used to execute instructions stored in the memory 730, and when the processor 720 executes instructions stored in the memory, the processor 720 is used to execute the various steps and / or processes of the above method embodiment corresponding to the first device or the second device.

[0316] Optionally, the communication device 700 is the first device in the above embodiment.

[0317] Optionally, the communication device 700 is the second device in the above embodiment.

[0318] Among them, the transceiver 710 may include a transmitter and a receiver. The transceiver 710 may further include an antenna, and the number of antennas may be one or more. The processor 720 and the memory 730 and the transceiver 710 may be devices integrated on different chips. For example, the processor 720 and the memory 730 may be integrated in a baseband chip, and the transceiver 710 may be integrated in a radio frequency chip. The processor 720 and the memory 730 and the transceiver 710 may also be devices integrated on the same chip. This application does not limit this.

[0319] Optionally, the communication device 700 is a component configured in the first device, such as a chip, a chip system, etc.

[0320] Optionally, the communication device 700 is a component configured in a second device, such as a chip, a chip system, etc.

[0321] The transceiver 720 may also be a communication interface, such as an input / output interface, a circuit, etc. The transceiver 720, the processor 710, and the memory 730 may be integrated into the same chip, such as a baseband chip.

[0322] The present application also provides a processing device, including at least one processor, wherein the at least one processor is used to execute a computer program stored in a memory, so that the processing device executes the method executed by the first device in the above method embodiment.

[0323] The embodiment of the present application also provides a processing device, including a processor and an input / output interface. The input / output interface is coupled to the processor. The input / output interface is used to input and / or output information. The information includes at least one of an instruction and data. The processor is used to execute a computer program so that the processing device executes the method executed by the first device in the above method embodiment.

[0324] The present application also provides a processing device, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the processing device executes the method executed by the first device in the above method embodiment.

[0325] It should be understood that the above-mentioned processing device can be one or more chips. For example, the processing device can be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD) or other integrated chips.

[0326] It should be noted that the processor in the embodiment of the present application can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The disclosed methods, steps and logic block diagrams in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0327] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0328] According to the method provided in the embodiments of the present application, the present application also provides a computer program product, which includes: computer program code, when the computer program code is run on a computer, the computer executes the method executed by the first device or the second device in the above method embodiment.

[0329] According to the method provided in the embodiment of the present application, the present application also provides a computer-readable storage medium, which stores a program code. When the program code runs on a computer, the computer executes the method executed by the first device or the second device in the above method embodiment.

[0330] According to the method provided in the embodiment of the present application, the present application also provides a communication system, which may include the aforementioned first device and second device.

[0331] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software 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 this application.

[0332] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A communication method, characterized in that: The method comprises: The first device determines a first frequency unit; The first device communicates with a second device on the first frequency unit; The granularity of the first channel grid corresponding to the first frequency unit is less than or equal to the granularity of the second channel grid corresponding to the second frequency unit, the second frequency unit is used for communication between the first device and the third device, and the first frequency unit and the second frequency domain unit are located in the same working frequency band.

2. The method according to claim 1, characterized in that The method further comprises: The first device sends first configuration information to the second device, where the first configuration information is used to indicate at least one of the following: Upward offset; The frequency domain spacing between the downlink frequency position and the uplink frequency position; Uplink frequency unit.

3. A communication device, characterized in that: include: A processing unit, configured to determine a first frequency unit; a transceiver unit, configured to communicate with a second device on the first frequency unit; Among them, the granularity of the first channel grid corresponding to the first frequency unit is less than or equal to the granularity of the second channel grid corresponding to the second frequency unit, the second frequency unit is used for communication between the communication device and the third device, and the first frequency unit and the second frequency domain unit are located in the same working frequency band.

4. The device according to claim 3, characterized in that The transceiver unit is also used for: Sending first configuration information to the second device, where the first configuration information is used to indicate at least one of the following: Upward offset; The frequency domain spacing between the downlink frequency position and the uplink frequency position; Uplink frequency unit.

5. The method or device according to any one of claims 1 to 4, characterized in that: The frequency position of the first channel grid in the first frequency unit corresponds to the frequency position of a resource element in the first frequency unit, and the index of the resource element in the frequency domain is determined according to the transmission bandwidth of the first frequency unit or the transmission bandwidth of the second frequency unit.

6. The method or device according to any one of claims 1 to 5, characterized in that: The boundaries of the resource blocks of the first frequency unit and the resource blocks of the second frequency unit are aligned, or the boundaries of the subcarriers of the first frequency unit and the subcarriers of the second frequency unit are aligned.

7. The method or device according to any one of claims 1 to 6, characterized in that: The first frequency unit is included in the transmission bandwidth of the second frequency unit, and the resource block of the first frequency unit and the resource block of the second frequency unit are aligned with each other; or, The first frequency unit is included in a guard band of the second frequency unit, and a subcarrier boundary of the first frequency unit is aligned with a subcarrier boundary of the second frequency unit; or, The first frequency unit is not included in the second frequency unit, a frequency domain interval between the first frequency unit and the second frequency unit is smaller than a threshold, and subcarrier boundaries of the first frequency unit and subcarrier boundaries of the second frequency unit are aligned.

8. The method or device according to any one of claims 1 to 7, characterized in that: The granularity of the first channel grid is determined according to at least one of the following: a deployment mode of the first frequency unit; The subcarrier spacing of the first frequency unit.

9. The method or device according to any one of claims 1 to 7, characterized in that: In the same working frequency band, the granularity of the second channel grid is 100 kHz, and the granularity of the first channel grid is 10 kHz.

10. The method or device according to any one of claims 1 to 7, characterized in that: In the same working frequency band, the granularity of the second channel grid is 100 kHz, and the granularity of the first channel grid is an integer multiple of 5 kHz, 10 kHz or 20 kHz.

11. The method or device according to any one of claims 1 to 10, characterized in that: The RF reference frequency F corresponding to the first frequency unit REF Satisfaction: F REF =F REF-Offs +ΔF Global (N REF –N REF-Offs )+offset; where F REF-Offs is the RF reference frequency offset value, ΔF Global is the granularity of the global channel grid, N REF N is the new radio frequency channel number NR-ARFCN, REF-Offs is the NR-ARFCN offset value, offset is the frequency offset, and the value of offset is one of {-50, -45, -40, -35, -30, -25, -20, -15, -10, -5, 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50} kHz.

12. The method or device according to any one of claims 1 to 11, characterized in that: The first frequency unit includes an uplink frequency unit for transmitting an uplink signal, and / or a downlink frequency unit for transmitting a downlink signal; The first device determines a first frequency unit, including: The first device determines the uplink frequency unit according to the uplink frequency position and the uplink offset; and / or, The first device determines the downlink frequency domain unit according to the downlink frequency position and the downlink offset; Before the first device determines the first frequency unit, the method includes: The first device determines the uplink offset and / or the downlink offset based on at least one of the frequency band type of the downlink frequency unit, the first capability of the second device, the type of the second device, the time domain resource type of the signal carried by the downlink frequency unit, and the time domain resource type of the signal carried by the uplink frequency unit, wherein the first capability is whether to support frequency shifting of the uplink signal to an uplink transmission band outside the downlink transmission band where the downlink frequency unit is located.

13. The method or device according to claim 12, characterized in that: The downlink frequency unit is located in the downlink transmission frequency band, The first capability is to support frequency shifting of the uplink signal to an uplink transmission frequency band outside the downlink transmission frequency band, and the uplink offset is a first value or a second value; or, the first capability is not to support frequency shifting of the uplink signal to an uplink transmission frequency band outside the downlink transmission frequency band, and the uplink offset is the first value; Alternatively, the downlink frequency unit is located in the uplink transmission frequency band, The downlink offset and the uplink offset are both the first value or the second value.

14. The method or device according to claim 13, characterized in that: The downlink transmission frequency band and the uplink transmission frequency band are located in the same working frequency band.

15. The method or device according to claim 13 or 14, characterized in that: The uplink transmission frequency band is used for long term evolution LTE uplink communication, and the uplink offset is a second value; or, The uplink transmission frequency band is not used for LTE uplink communication, and the uplink offset is a first value.

16. The method or device according to claim 15, characterized in that: The first frequency unit is located in a TDD operating frequency band, the downlink signal occupies a downlink time domain resource, and the uplink signal occupies an uplink time domain resource, and the downlink offset and the uplink offset are both a first value or a second value; or The downlink signal and the uplink signal both occupy downlink time domain resources, and the downlink offset and the uplink offset are both first values; or The downlink signal and the uplink signal both occupy uplink time domain resources, and the downlink offset and the uplink offset are both the first value or the second value.

17. The method or device according to claim 16, characterized in that: The uplink time domain resource is used for LTE uplink communication, and the downlink offset and the uplink offset are second values; or, The uplink time domain resource is not used for LTE uplink communication, and the downlink offset and the uplink offset are first values.

18. The method or device according to any one of claims 13 to 17, characterized in that: The first value is 0, and the second value is 7.5 kHz.

19. The method or device according to any one of claims 1 to 18, characterized in that: The second frequency unit is located in an uplink transmission frequency band, the uplink frequency unit in the first frequency unit is located in a transmission bandwidth of the second frequency unit, and the downlink frequency unit in the first frequency unit is located in a protection band of the second frequency unit; or, The second frequency unit is located in a downlink transmission frequency band, the downlink frequency unit is located within a transmission bandwidth of the second frequency unit, and the uplink frequency unit is located within a protection band of the second frequency unit; or, The first frequency unit is located in the TDD working frequency band, the downlink signal transmitted by the downlink frequency unit and the uplink signal corresponding to the downlink signal transmitted by the uplink frequency unit both occupy downlink time domain resources, the downlink frequency unit is located within the transmission bandwidth of the second frequency unit, and the uplink frequency unit is located within the protection band of the second frequency unit; or, The first frequency unit is located in the TDD working frequency band, the downlink signal transmitted by the downlink frequency unit and the uplink signal corresponding to the downlink signal transmitted by the uplink frequency unit both occupy uplink time domain resources, the downlink frequency unit is located in the protection band of the second frequency unit, and the uplink frequency unit is located in the protection band of the second frequency unit.

20. A chip, characterized in that: include: A processor, configured to call and execute computer instructions from a memory so that a device equipped with the chip executes a method as claimed in any one of claims 1, 2, 5 to 19.

21. A computer-readable storage medium, characterized in that: Used to store computer program instructions, the computer program causing a computer to execute the method as claimed in any one of claims 1, 2, 5 to 19.

Images