COMMUNICATION METHOD, COMMUNICATION DEVICE, COMMUNICATION EQUIPMENT, AND STORAGE MEDIUM

Abstract

The present application provides a communication method, a communication device, a communication equipment, and a storage medium. The method includes: a first equipment determines a first frequency unit, and the first equipment communicates with a second equipment in the first frequency unit. The granularity of a first channel raster corresponding to the first frequency unit is equal to or smaller than the granularity of a second channel raster corresponding to the second frequency unit. The second frequency unit is used for communication between the first equipment and a third equipment. The first frequency unit and the second frequency unit are arranged in the same operating band. The embodiment of the present application provides a solution for determining a frequency unit, so that the first equipment can communicate with the second equipment through the first frequency unit. Furthermore, when the frequency unit is determined, the granularity of the channel raster is taken into account, and the granularity of the first channel raster corresponding to the first frequency unit is set to a smaller value to improve the flexibility for deploying the first frequency unit.

Description

[Technical field]

[0001] The present application relates to the field of communication technologies, and in particular to a communication method, a communication device, a communication equipment, and a storage medium. [Background technology]

[0002] This application claims priority to Chinese Patent Application No. 202210114704.6, filed with the China State Intellectual Property Office on January 30, 2022, and entitled “Communication Method, Communication Apparatus, Communication Device, and Storage Medium,” which is incorporated herein by reference in its entirety.

[0003] With the widespread application of machine-type communication (MTC) and internet of things (IoT) communication, some communication systems, such as Long Term Evolution (LTE) system and New Radio (NR) system, support technologies such as radio frequency identification (RFID) and wake-up receiver or wake-up radio (WUR) to reduce the application cost and power consumption of IoT. To meet this requirement, how to apply RFID and WUR technologies to communication systems is currently an issue that needs to be urgently solved. Regardless of which technology is used, for device-to-device communication, the frequency unit used for communication needs to be determined first. Summary of the Invention

[0004] The embodiments of the present application provide a communication method, a communication device, and a communication equipment, as well as a storage medium, to provide a solution for determining frequency units of inter-device communication.

[0005] According to a first aspect, an embodiment of the present application provides a communication method, the method including: a first device determines a first frequency unit; the first device communicates with a second device on the first frequency unit; a granularity of a first channel raster corresponding to the first frequency unit is equal to or smaller than a granularity of a second channel raster corresponding to the second frequency unit; the second frequency unit is used for communication between the first device and a third device; and a first frequency unit and a second frequency unit are used for communication between the first device and a third device. Number of The units are arranged in the same operating band.

[0006] In the communication method provided in the first aspect, when communicating with various devices, the first device determines a first frequency unit used for communication between the first device and the second device. The first frequency unit and the second frequency unit used for communication between the first device and the third device are arranged in the same operating band, and the granularity of the first channel raster corresponding to the first frequency unit is equal to or smaller than the granularity of the second channel raster. The embodiment of the present application provides a solution for determining the frequency unit, so that the first device can communicate with the second device via the first frequency unit. Furthermore, when the frequency unit is determined, the granularity of the channel raster is taken into account, and the granularity of the first channel raster corresponding to the first frequency unit may be set to a smaller value to improve the flexibility for deploying the first frequency unit.

[0007] A first device may communicate with another device by sending a signal or by receiving a signal.

[0008] In a possible implementation, the frequency position at which the first channel raster in the first frequency unit is located corresponds to the frequency position of the resource element in the first frequency unit, and the index of the resource element in the frequency domain is determined based on the transmission bandwidth of the first frequency unit or the transmission bandwidth of the second frequency unit.

[0009] In a communications method provided in this implementation, a first device determines a frequency location of a resource element corresponding to a first channel raster.

[0010] In a possible implementation, the boundaries of resource blocks in the first frequency unit are aligned with the boundaries of resource blocks in the second frequency unit, or the boundaries of subcarriers in the first frequency unit are aligned with the boundaries of subcarriers in the second frequency unit.

[0011] In the communication method provided in this embodiment, the boundaries of RBs in the first frequency unit need to be aligned with the boundaries of RBs in the second frequency unit to avoid causing resource fragmentation and reducing spectrum utilization efficiency, and the boundaries of subcarriers in the first frequency unit can be aligned with the boundaries of subcarriers in the second frequency unit to avoid interference caused to data transmission within the transmission bandwidth of the second frequency unit due to the subcarriers being non-orthogonal.

[0012] In a possible implementation, if the first frequency unit is included in the transmission bandwidth of the second frequency unit, the boundaries of the resource blocks in the first frequency unit are aligned to the boundaries of the resource blocks in the second frequency unit, or if the first frequency unit is included in the guard band of the second frequency unit, the boundaries of the subcarriers in the first frequency unit are aligned to the boundaries of the subcarriers in the second frequency unit, or if the first frequency unit is not included in the second frequency unit and the frequency domain interval between the first and second frequency units is less than a threshold, the boundaries of the subcarriers in the first frequency unit are aligned to the boundaries of the subcarriers in the second frequency unit.

[0013] In the communication method provided in this implementation, when the first frequency unit is included in the transmission bandwidth of the second frequency unit, the boundary of the RB in the first frequency unit needs to be aligned with the boundary of the RB in the second frequency unit to avoid causing resource fragmentation and reducing spectrum utilization efficiency. When the first frequency unit is not included in the transmission bandwidth of the second frequency unit, the boundary of the subcarrier in the first frequency unit can be aligned with the boundary of the subcarrier in the second frequency unit to avoid interference caused to data transmission in the transmission bandwidth of the second frequency unit due to the subcarriers being non-orthogonal.

[0014] In a possible implementation, the granularity of the first channel raster is determined based on at least one of the following: a deployment mode of the first frequency unit, and a subcarrier spacing of the first frequency unit.

[0015] In the communication method provided in this implementation, the granularity of the first channel raster is determined based on the deployment mode of the first frequency unit and / or the subcarrier interval of the first frequency unit, so that the granularity of the first channel raster is applicable to the current communication. For example, when the flexibility of deploying the first frequency unit is satisfied, the granularity of the first channel raster does not need to be set to an excessively small value.

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

[0017] The communication method provided in this implementation allows for increased flexibility in deploying the first frequency units.

[0018] In a possible implementation, the radio frequency reference frequency corresponding to the first frequency unit satisfies the following: F REF =F REF-Offs +ΔF Global (N REF -NREF-Offs )+offset. F REF-Offs is the radio frequency reference frequency offset value, and ΔF Global is the granularity of the global channel raster, and N REF is the new radio absolute radio frequency channel number NR-ARFCN, N REF-Offs is the offset value of NR-ARFCN, offset is the frequency offset, and the offset value 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] In the communication method provided in this implementation, the radio frequency reference frequency is determined based on an offset to the above-mentioned value, and a small value is used to determine the granularity of the first channel raster to improve the flexibility of deploying the first frequency units.

[0020] In a possible implementation, the first frequency unit includes an uplink frequency unit used to transmit an uplink signal, and / or a downlink frequency unit used to transmit a downlink signal. The first device determining the first frequency unit includes: the first device determining the uplink frequency unit based on an uplink frequency position and an uplink offset; and / or the first device determining the downlink frequency unit based on a downlink frequency position and a downlink offset. Number ofBefore the first device determines the first frequency unit, the method includes: the first device determines an uplink offset and / or a downlink offset based on at least one of a type of frequency band in which the downlink frequency unit is located, a first capability of the second device, a type of the second device, a type of time domain resource in which the signal carried by the downlink frequency unit is located, and a type of time domain resource in which the signal carried by the uplink frequency unit is located. The first capability indicates whether a frequency shift of the uplink signal to an uplink transmission frequency band other than the downlink transmission frequency band in which the downlink frequency unit is located is supported.

[0021] In the communication method provided in this implementation, the first device determines a first frequency unit based on an uplink offset and / or a downlink offset to avoid mutual interference caused to data transmission between the communication systems because the subcarrier boundaries in the first frequency unit are not aligned with the subcarrier boundaries in other communication systems (e.g., LTE systems, etc.) (i.e., the subcarriers are not orthogonal).

[0022] In a possible implementation, if the downlink frequency unit is located in a downlink transmission frequency band and the first capability indicates that a frequency shift of the uplink signal for an uplink transmission frequency band other than the downlink transmission frequency band is supported, the uplink offset is the first value or the second value. Alternatively, if the first capability indicates that a frequency shift of the uplink signal for an uplink transmission frequency band other than the downlink transmission frequency band is not supported, the uplink offset is the first value. Alternatively, the downlink frequency unit is located in an uplink transmission frequency band and both the downlink offset and the uplink offset are the first value or the second value.

[0023] In the communication method provided in this implementation, if the second device supports shifting of an uplink signal relative to an uplink transmission frequency band, the subcarrier and the uplink carrier of another communication system (such as an LTE system) may be located in the same transmission frequency band. In this case, it is necessary to determine that the uplink offset is a second value (i.e., the first frequency unit needs to be shifted) or a first value (i.e., the first frequency unit does not need to be shifted) to avoid that the boundary of the subcarrier in the first frequency unit is not aligned with the boundary of the subcarrier in another communication system.

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

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

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

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

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

[0029] In the communication method provided in this implementation, when the uplink transmission frequency band is used for LTE uplink communication, the first frequency unit: In the first frequency unit It needs to be shifted to implement the alignment between the subcarrier boundaries in the first frequency unit and the subcarrier boundaries in the frequency unit of the LTE system. If the uplink transmission frequency band is not used for LTE uplink communication, there is no problem of alignment between the subcarrier boundaries in the first frequency unit and the subcarrier boundaries in the frequency unit of the LTE system, and there is no need to perform the shift.

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

[0031] In the communication method provided in this implementation, when both an uplink signal carried by an uplink frequency unit and an uplink signal of another communication system (e.g., an LTE system) can be transmitted on the uplink time domain resource, it is further determined whether a frequency shift needs to be performed on the first frequency unit based on the uplink / downlink offset to avoid that the subcarrier boundaries in the first frequency unit are not aligned with the subcarrier boundaries in the frequency unit of the other communication system.

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

[0033] In the communication method provided in this implementation, if it is determined that the uplink time domain resource is used for LTE uplink communication, it is determined that a frequency shift needs to be performed on the first frequency unit based on the uplink / downlink offset to avoid that the boundaries of the subcarriers in the first frequency unit are not aligned with the boundaries of the subcarriers in the frequency unit of LTE. Otherwise, there is no need to perform a frequency shift.

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

[0035] In the communication method provided in this implementation, when the uplink offset / downlink offset is 0, it indicates that the first frequency unit does not need to be shifted based on the uplink offset / downlink offset. When the first frequency unit does not need to be shifted based on the uplink offset / downlink offset, the uplink offset / downlink offset is 7.5 kHz, so that the first frequency unit Deputy It can ensure that carrier boundaries are reliably aligned with subcarrier boundaries in the LTE system.

[0036] In a possible implementation, the method further includes: the first device receiving first configuration information, the first configuration information including one of: an uplink offset, a downlink offset, and a frequency domain spacing between the downlink frequency location and the uplink frequency location.

[0037] In the communication method provided in this implementation, the system overhead of the first device is reduced.

[0038] In a possible implementation, when the second frequency unit is arranged in the uplink transmission frequency band, the uplink frequency units in the first frequency unit are arranged in the transmission bandwidth of the second frequency unit, and the downlink frequency units in the first frequency unit are arranged in the guard band of the second frequency unit. Alternatively, when the second frequency unit is arranged in the downlink transmission frequency band, the downlink frequency units are arranged in the transmission bandwidth of the second frequency unit, and the uplink frequency units are arranged in the guard band of the second frequency unit. Alternatively, when the first frequency unit is arranged in the TDD operating band, and both a downlink signal transmitted on the downlink frequency unit and an uplink signal transmitted on the uplink frequency unit, which corresponds to the downlink signal, occupy downlink time domain resources, the downlink frequency units are arranged in the transmission bandwidth of the second frequency unit, and the uplink frequency units are arranged in the guard band of the second frequency unit. Alternatively, when a first frequency unit is located in a TDD operating band, and both a downlink signal transmitted on a downlink frequency unit and an uplink signal transmitted on an uplink frequency unit, where the uplink signal corresponds to the downlink signal, occupy uplink time domain resources, the downlink frequency unit is located in a guard band of a second frequency unit, and the uplink frequency unit is located in a guard band of the second frequency unit.

[0039] In the communication method provided in this implementation, for various scenarios in which the problem of different receiving and transmitting directions may exist, the downlink frequency unit and the uplink frequency unit in the first frequency unit are separately deployed in the transmission bandwidth or guard band of the second frequency unit to avoid the problem of signal interference caused by the different receiving and transmitting directions between the first frequency unit and the second frequency unit.

[0040] In a possible implementation, the method further includes: the first device sending first configuration information to the second device, where the first configuration information indicates at least one of the following: an uplink offset, a frequency domain spacing between the downlink frequency location and the uplink frequency location, and an uplink frequency unit.

[0041] In the communication method provided in this implementation, the first device can flexibly configure the second device, and the system overhead of the second device is reduced. Furthermore, the first device provides the second device with parameters that cannot be determined based on the capabilities of the second device to implement communication between the second device and the first device.

[0042] According to a second aspect, an embodiment of the present application provides a communication device. The communication device may perform the procedure in the first aspect. For example, the communication device may include: a processing unit configured to determine a first frequency unit; and a transceiver unit configured to communicate with a second device on the first frequency unit. A granularity of a first channel raster corresponding to the first frequency unit is equal to or smaller than a granularity of a second channel raster corresponding to the second frequency unit. The second frequency unit is used for communication between the communication device and a third device. The first frequency unit and the second frequency unit may be used for communication between the communication device and a third device. Number of The units are arranged in the same operating band.

[0043] For the beneficial effects of the communication device provided in the second aspect and possible implementations of the second aspect, please refer to the beneficial effects provided by the first aspect and possible implementations of the first aspect, and the details will not be described again in this specification.

[0044] According to a third aspect, an embodiment of the present application provides a communication device, including a processor and a memory, the memory configured to store a computer program, the processor configured to call and execute the computer program stored in the memory to perform a method according to the first aspect or any one of the possible implementations.

[0045] According to a fourth aspect, an embodiment of the present application provides a chip including a processor configured to retrieve computer instructions from a memory and execute the computer instructions, causing a device in which the chip is installed to perform a method according to the first aspect or any one of the possible implementations.

[0046] According to a fifth aspect, an embodiment of the present application provides a computer readable storage medium configured to store computer program instructions, the computer program causing a computer to carry out a method according to the first aspect or any one of the possible implementations.

[0047] According to a sixth aspect, an embodiment of the present application provides a computer program product, comprising computer program instructions, which when executed by a computer, cause the method according to the first aspect or any one of the possible implementations. [Brief description of the drawings]

[0048] [Figure 1] FIG. 1 illustrates a communication system applicable to an embodiment of the present application. [Figure 2a] FIG. 1 illustrates an RFID communication system according to the present application. [Figure 2b]FIG. 1 illustrates a split architecture RFID communication system according to the present application. [Figure 2c] FIG. 1 illustrates a centralized architecture RFID communication system according to the present application. [Figure 3a] FIG. 2 illustrates one type of WUR communication according to the present application. [Figure 3b] FIG. 2 illustrates another type of WUR communication according to the present application. [Figure 4] FIG. 2 illustrates envelope detection according to the present application. [Diagram 5] FIG. 1 illustrates backscatter communication in accordance with the present application. [Figure 6] FIG. 2 illustrates a common resource block according to the present application. [Figure 7] FIG. 2 illustrates a frequency domain relationship between bandwidth portions and carriers according to the present application. [Figure 8] 4 is a schematic interaction flow chart illustrating a communication method 400 according to an embodiment of the present application. [Figure 9a] FIG. 2 illustrates one deployment mode of a frequency unit according to one embodiment of the present application. [Figure 9b] FIG. 2 illustrates another deployment mode of a frequency unit according to an embodiment of the present application. [Figure 9c] FIG. 2 illustrates another deployment mode of a frequency unit according to an embodiment of the present application. [Figure 10] FIG. 2 illustrates a frequency unit according to an embodiment of the present application. [Figure 11] 5 is an interaction flow chart illustrating a communication method 500 according to an embodiment of the present application. [Figure 12a] FIG. 2 illustrates one type of uplink / downlink transmission in FDD mode according to one embodiment of the present application. [Figure 12b] FIG. 2 illustrates another type of uplink / downlink transmission in FDD mode according to an embodiment of the present application. [Figure 12c]FIG. 2 illustrates another type of uplink / downlink transmission in FDD mode according to an embodiment of the present application. [Figure 13a] FIG. 2 illustrates one type of uplink / downlink transmission in TDD mode according to one embodiment of the present application. [Figure 13b] FIG. 2 illustrates another type of uplink / downlink transmission in TDD mode according to an embodiment of the present application. [Figure 13c] FIG. 2 illustrates another type of uplink / downlink transmission in TDD mode according to an embodiment of the present application. [Figure 14a] FIG. 2 illustrates one deployment mode of an uplink / downlink frequency unit according to one embodiment of the present application. [Figure 14b] FIG. 2 illustrates another deployment mode of an uplink / downlink frequency unit according to an embodiment of the present application. [Figure 14c] FIG. 2 illustrates another deployment mode of an uplink / downlink frequency unit according to an embodiment of the present application. [Figure 14d] FIG. 2 illustrates another deployment mode of an uplink / downlink frequency unit according to an embodiment of the present application. [Figure 15] 1 is a block diagram illustrating a communication device according to an embodiment of the present application. [Figure 16] FIG. 2 is another block diagram of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0049] The technical solutions of the present application are described below with reference to the accompanying drawings.

[0050] The communication method provided in the present application may be used in various communication systems, such as a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS) system, a Long Term Evolution (LTE) system, an Advanced Long Term Evolution (LTE-A) system, a New Radio (NR) system, an evolved version of an NR system, an LTE-based access to unlicensed spectrum (LTE-U) system, an NR-based access to unlicensed spectrum (NR-U) system, a Non-Terrestrial Network (NTN) system, a Universal Mobile Telecommunications System (UMTS), a Wireless Local Area Network (WLAN), a Wireless Fidelity (Wi-Fi), a 5th Generation (5G) system, a 5G ... th The present invention may be applied to a 5G (High-Speed ​​LTE) communication system, or another communication system.

[0051] The terminal device may be a STATION (ST) in a WLAN, such as 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 capabilities, a computing device, another processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a next generation communication system, such as a NR network, or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, or the like.

[0052] In an embodiment of the present application, the terminal device may be a mobile phone, a tablet computer (Pad), a computer with a 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, a wireless terminal device in a smart home, or the like.

[0053] By way of example and not of limitation, in the embodiment of the present application, the terminal device may alternatively be a wearable device. A wearable device may also be called a wearable intelligent device, which is a collective term for wearable devices that are intelligently designed and developed for daily wear by using wearable technology, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that can be directly worn on the body or integrated into the user's clothing or accessories.

[0054] In an embodiment of the present application, the network equipment may be an equipment configured to communicate with a mobile device. The network equipment may be an Access Point (AP) in a WLAN, a Base Transceiver Station (BTS) in a GSM or CDMA, a Node B (NB) in a WCDMA, an Evolved Node B (eNB or eNodeB) in a LTE, a relay station in a NR network, an access point, an in-vehicle device, a wearable device, a network equipment or gNB (gNB), a network equipment in a future evolved PLMN network, a network equipment in an NTN network, or the like.

[0055] In an embodiment of the present application, a network device may provide services to a cell, and a terminal device communicates with the network device by using a transmission resource (e.g., referred to as a frequency domain resource or spectrum resource) used by the cell. The cell may be a cell corresponding to a network device (e.g., a base station, etc.). The cell may belong to a macro base station or a base station corresponding to a small cell. The small cell in this specification may include a metro cell, a micro cell, a pico cell, a femto cell, and the like. These small cells have characteristics of small coverage and low transmission power, and are applicable to providing high-speed data transmission services.

[0056] It should be understood that the specific configuration of the network equipment and the terminal equipment is not limited in this application.

[0057] First, in order to facilitate understanding of the embodiment of the present application, a communication system applicable to the embodiment of the present application will be described in detail with reference to FIG. 1. FIG. 1 is a diagram showing a communication system applicable to a communication method according to an embodiment of the present application. As shown in FIG. 1, a communication system 100 may include a network device and a terminal device. There may be one or more network devices and one or more terminal devices, for example, the network devices 111 and 112 shown in FIG. 1, and the terminal devices 121 to 128. In the communication system 100, the network device 111 may communicate with one or more of the terminal devices 121 to 126 via a wireless air interface, and the network device 111 may communicate with one or more of the terminal devices 127 and 128 via the network device 112. Furthermore, the terminal devices 124 to 126 may form a communication system 101. In the communication system 101, the terminal device 124 may communicate with one or more of the terminal devices 125 and 126 via a wireless air interface. The network device 112 and the terminal devices 127 and 128 may form a communication system 102. In the communication system 102, the network device 112 may communicate with one or more of the terminal devices 127 and 128 via a wireless air interface.

[0058] It should be understood that communication system 101 may be a subsystem of communication system 100 or may be a communication system separate from communication system 100. Communication system 102 may be a subsystem of communication system 100 or may be a communication system separate from communication system 100.

[0059] It should be further understood that Fig. 1 is merely an example and shows two network devices and eight terminal devices in communication system 100, three terminal devices in communication system 101, one network device and two terminal devices in communication system 102. However, this does not constitute any limitation to the present application. Any one of the above communication systems may include more or fewer network devices, or more or fewer terminal devices. This is not limited to the present embodiment of the present application.

[0060] With the popularization of MTC and Internet of Things (IoT) communication in 5G NR system, more IoT devices, such as smart water meters, bike sharing, smart city, environmental monitoring, smart home, and forest fire prevention, that target sensing and data collection, are deployed in people's lives. Therefore, in the future, IoT devices will be ubiquitous and may be embedded in every piece of clothing, every piece of luggage, and every key. Almost every offline object will become online with the realization of Internet of Things technology.

[0061] In order to make IoT more popular and embed IoT modules in the human body or smaller objects, smaller batteries need to be used, or even battery limitations need to be completely removed, or methods are designed to reduce the power consumption of wireless transceivers to overcome the limited problems of cost, size, power consumption, and the like in IoT devices. Therefore, passive IoT and passive WUR are introduced in 5G NR systems. Passive IoT is developed based on the idea of ​​current RFID technology, which is developed and used in large quantities. Since the power supply module is omitted, the size of passive RFID products can reach the centimeter level or even smaller. Furthermore, due to the simple configuration and low cost of passive RFID products, low failure rates and long service life are achieved.

[0062] In the following, RFID and WUR technologies are first described.

[0063] 1. RFID technology: RFID technology is a non-contact automatic identification technology, which can automatically identify target objects and obtain related data by using radio frequency signals.

[0064] Typically, an RFID system includes a reader and a tag. Referring to Fig. 2a, the reader sends an excitation signal to the tag to charge it. The tag receives the signaling sent by the reader and sends a backscatter signal to the reader in a backscatter communication manner. In this way, the reader can identify the tag's identity document (ID) and perform operations such as read / write operations on the tag.

[0065] It should be noted that the excitation signal transmitted by the reader to the tag can be a downlink signal or one of the following downlink signals, and the backscatter signal can be an uplink signal or one of the following uplink signals: The tag transmits the backscatter signal to the reader in the backscatter communication method, specifically, the tag transmits the uplink signal by using the carrier wave provided by the downlink signal.

[0066] Currently, the following two methods are commonly used to extend the effective operating distance of RFID.

[0067] Scheme 1: Split Architecture: Referring to Figure 2b, the split reader includes a helper and a receiver. The helper transmits an excitation signal to the tag via a forward link, and the receiver receives a backscattered signal from the tag via a reverse link. In addition, the receiver generates RFID-related downlink signaling and transmits the downlink signaling to the helper via a fronthaul link. The helper then forwards the downlink signaling via the forward link.

[0068] Scheme 2: Centralized or Integrated Architecture: Referring to FIG. 2c, in addition to excitation and backscattering of signals between the reader and tags via forward and reverse links, the reader further communicates with a central control unit (e.g., a base station, etc.), which may perform scheduling, control, and the like over the forward link resources used by the reader, and transmission operations.

[0069] In this embodiment of the application, to support RFID in an NR system, NR technology can be used for communication between the helper and receiver in method 1, and for communication between the reader and central control unit in method 2.

[0070] 2. WUR Technology: After a primary connection radio (PCR) with high power consumption, sometimes called a primary receiver, goes into a sleep state, a companion radio with low power consumption, sometimes called a wake-up receiver (WUR), monitors the wake-up frames sent by the AP, and wakes up the PCR after the companion radio detects the wake-up frame through monitoring.

[0071] Referring to FIG. 3a, the primary receiver 311 and the wake-up receiver 312 are disposed in the receiving end device 310. When the transmitting end device 320 (e.g., AP or terminal device, etc.) does not transmit data, the primary receiver is turned off, which is also called a sleep state, and the wake-up receiver is turned on. Referring to FIG. 3b, when the transmitting end device 320 transmits data, the transmitting end device 320 first transmits wake-up data (e.g., the above-mentioned wake-up frame, etc.), and after the receiving end device 310 receives the wake-up data through the wake-up receiver 312, the receiving end device 310 activates the primary receiver 311, so that the primary receiver is turned on, which is also called an active state. In this case, after the transmitting end device 320 transmits the wake-up data, the receiving end device 310 receives the data transmitted by the transmitting end device 320 through the primary receiver 311.

[0072] It should be noted that the information bits of the wake-up machine are modulated into on-off keying (OOK) symbols. At the receiving end, OOK demodulation does not require any channel equalization in frequency and time domains. Therefore, the receiving end performs incoherent detection (e.g., envelope detection, etc.) through the wake-up receiver to perform monitoring. When incoherent detection is performed, the receiving end does not need to maintain / track the transmission rate with high accuracy. Therefore, the phase-locked loop can be avoided to further reduce the power consumption at the receiving end.

[0073] 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.

[0074] RFID technology applied to NR systems may be referred to as Passive IoT, for example. The passive IoT transmission mechanism provided in this application is similar to the RFID transmission mechanism. In Passive IoT, the passive IoT device (e.g., tag, etc.) may be Battery-Free, in other words, the passive IoT device does not have or does not primarily depend on a battery or a wired power source for power supply. However, the fact that the passive IoT device does not have a power module does not mean that the passive IoT device does not need to use power. The passive IoT device may obtain energy from ambient light, heat, and radio frequency to support Internet of Things data sensing, wireless transmission, distributed computing, and the like. The passive IoT device may alternatively be a passive energy storage device or a semi-passive device. The passive energy storage device has an energy storage device. Semi-passive devices have a battery, but the battery power supply only provides auxiliary support to the circuits that need to be powered to maintain the data in the tag, or to supply the voltages required for the operation of the tag chip, or to the tag circuits that consume very little power, and the battery size is relatively small.

[0075] For example, Figures 4 and 5 show the passive IoT communication down Link communication method and up FIG. 2 illustrates a link communication method.

[0076] For example, as shown in FIG. 4, FIG. 4 is a diagram illustrating a downlink communication method in a passive IoT.

[0077] The reader transmits an amplitude modulated signal to the tag via a downlink, and the tag receives the amplitude modulated signal. An envelope detector can be used to perform envelope detection on the amplitude modulated signal to obtain the low-frequency signal in the amplitude modulated signal. The envelope detector mainly includes a diode and a resistor-capacitor circuit (RC), i.e., an oscillator circuit, as shown in Figure 4.

[0078] The envelope detection circuit shown in Fig. 4 can be understood as a diagram showing the most conventional basic circuit configuration. The advanced configuration of the envelope detection circuit will not be described in detail in this specification. The configuration of the envelope detection circuit used by the tag is not limited in this embodiment of the present application.

[0079] For example, as shown in FIG. 5, FIG. 5 is a diagram illustrating an uplink communication method in a passive IoT.

[0080] The tag is never capable of providing a power source and for the data transmission performed by the tag there is no provision for connecting to a wired power source, so the tag needs to obtain energy from the external environment to be able to perform other operations such as data transmission and data processing.

[0081] Specifically, upon receiving a carrier signal transmitted by a reader, the tag may use energy harvested from electromagnetic fields generated in space to drive the chip to transmit information stored in the tag.

[0082] It may be understood that the uplink communication method in passive IoT communication shown in Fig. 5 is merely an example. In some other embodiments in the present application, the tag may further obtain energy such as ambient light and heat to drive the chip to transmit information stored in the tag. As described above, the tag may be a passive energy storage device or a semi-passive device.

[0083] It should be understood that passive IoT is merely an exemplary name, and other alternative expressions are also within the scope of protection of the present application.

[0084] It should further be understood that the information exchange procedures and signaling formats in the passive IoT scenario are merely exemplary and not restrictive.

[0085] Currently, in order to apply RFID technology, WUR technology, or similar technology to a communication system, how to determine a frequency unit between first devices (e.g., a transmitting reader, an AP, and a terminal device) in an NR system and transmit uplink data or downlink data on that frequency unit is a problem that currently needs to be solved urgently.

[0086] For the above-mentioned problem, the embodiment of the present application provides a solution for determining a frequency unit, so that the first device and the second device can communicate with each other in an NR system, an LTE system, or another similar communication system. Indeed, the solution for determining a frequency unit, which is provided in the present application, is not limited to the above-mentioned RFID technology, WUR technology, or similar technology. No matter which technology is used, for device-to-device communication, the frequency unit for communication can be determined based on the solution provided in the embodiment of the present application.

[0087] Furthermore, in an embodiment of the present application, frequency units for communication between a first device and various devices (e.g., a first frequency unit used for communication with a second device, a second frequency unit used for communication with a third device, etc.) are arranged in the same operating band. When the frequency units are determined, the granularity of the channel raster is taken into consideration, for example, the granularity of the first channel raster corresponding to the first frequency unit is set to a smaller value to improve the flexibility of deploying the frequency units.

[0088] To contribute to an understanding of the embodiments of this application, a brief explanation of terms used in this application will first be provided.

[0089] 1. Operating Band:

[0090] In 5G NR, two frequency ranges are defined, including frequency range (FR) 1 and FR2, where FR1 represents the low frequency band and FR2 represents the mmWave high frequency band.

[0091] For example, NR may operate in an operating band of FR1 shown in Table 1, where FR1 includes multiple operating bands in NR. Each operating band has a corresponding number, lower and upper frequency boundaries for uplink transmission (e.g., transmission from a terminal to a base station), lower and upper frequency boundaries for downlink transmission (e.g., transmission from a base station to a terminal), and a duplex mode. As shown in Table 1, for an operating band numbered n1, the lower frequency boundary F UL_low is 1920 MHz, and the upper frequency boundary F UL_high is 1980 MHz, and the lower frequency boundary F DL_low is 2110 MHz, and the upper frequency boundary F DL_high For the operating band numbered n39, the lower frequency boundary for both uplink and downlink transmission of the operating band is 1880 MHz, the upper frequency boundary for both uplink and downlink transmission of the operating band is 1920 MHz, and the duplex mode used by the operating band is time division duplex (TDD).

[0092] [Table 1-1]

[0093] [Table 1-2]

[0094] In addition to the above-mentioned FDD and TDD duplex modes, the duplex modes used by NR may further include a supplementary downlink (SDL) to augment the downlink coverage of NR and a supplementary uplink (SUL) to augment the uplink coverage of NR, as shown in Table 1. Both SDL and SUL are independent operating bands that do not exist in pairs.

[0095] 2. Numerology: In NR systems, numerology is introduced to accommodate OFDM waveforms with different subcarrier spacings, so that the subcarrier spacing can be adapted based on various application scenarios without restriction.

[0096] The transmission numerologies supported by the NR system are shown in Table 2.

[0097] [Table 2]

[0098] Δf is the subcarrier spacing, and μ is an integer equal to or greater than 0.

[0099] 3 .Antenna Port: An antenna port is defined such that the channel of a symbol transmitted on that antenna port can be inferred from the channels of other symbols transmitted on the same antenna port, in other words, the channel environment experienced by various signals transmitted on the same antenna port is the same.

[0100] 4Resource grid, or called resource grid: one resource grid corresponds to one numerology and one carrier. A resource grid is

[0101]

number

[0102] subcarriers and

[0103]

number

[0104] OFDM symbols. If the subcarrier spacing structure is μ,

[0105]

number

[0106] represents the number of resource blocks (RBs) in one resource grid.

[0107]

number

[0108] represents the number of subcarriers in one RB.

[0109]

number

[0110] is equal to 12 consecutive subcarriers.

[0111] It should be understood that there is one resource grid group for each 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.

[0112] The starting resource block of the resource grid is the common resource block (CRB).

[0113] 5 Resource element (RE): Each element in the resource grid used for antenna port p and subcarrier spacing configuration μ is called a resource element, and is a (k, l) p,μ A resource element (k, l) is uniquely identified by k, where k is the index of the RE in the frequency domain, and l is the symbol of the RE and the position of the symbol relative to a reference point in the time domain. p,μ is a physical resource and a complex value

[0114]

number

[0115] If there is no risk of confusion or if a specific antenna port or subcarrier spacing is not specified, index p and index μ may be dropped, resulting in

[0116]

number

[0117] or a k,l It becomes.

[0118] 6.common resource block: For a subcarrier spacing configuration μ, common resource blocks are numbered in ascending order in the frequency domain starting from 0. The center frequency of subcarrier 0 of common resource block 0 in subcarrier spacing configuration μ overlaps the common reference point of the resource grid, i.e. point A. See Figure 6.

[0119] 7 Physical resource block: A physical resource block of a subcarrier spacing configuration μ is defined in a bandwidth part (BWP).

[0120] 8 .BWP: a given numerology μ in BWP i on a given carrier i , the BWP is a subset of the contiguous CRB. The frequency location relationship between the BWP and the carrier can be shown in FIG.

[0121] Typically, a terminal device may be configured with up to four BWPs on the downlink, with one downlink BWP active at a given time. A terminal device may be configured with up to four BWPs on the uplink, with one uplink BWP active at a given time. If the terminal device is configured with a supplementary uplink, the terminal device may additionally be configured with up to four bandwidth portions on the supplementary uplink, with a single supplementary uplink BWP active at a given time.

[0122] 9 .Global frequency raster

[0123] In an NR system, the global frequency raster consists of a radio frequency (RF) reference frequency F REFThe RF reference frequency is used in RF channels, synchronization signal (SS) blocks, and signaling to identify the location of other elements. A global frequency raster is defined for all frequencies from 0 to 100 GHz. The granularity of the global frequency raster is ΔF Global It is.

[0124] For the frequency range 0 to 24250 MHz, 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 raster. REF The relationship between the frequency (MHz) and the frequency (MHz) is given by the following equation: REF-Offs and N REF-Offs is given in Table 3, and N REF is NR-ARFCN. F REF =F REF-Offs +ΔF Global (N REF -N REF-Offs )

[0125] [Table 3]

[0126] 10 .Channel Raster

[0127] In an NR system, a channel raster may be used to define a subset of radio frequency reference frequencies and identify the location of radio frequency channels in uplink and downlink transmissions. The RF reference frequencies of the RF channels are mapped to resource elements on the carrier. For each operating frequency band, a frequency subset from the global frequency raster is applicable to the frequency band and has a granularity of ΔF. Raster form a channel raster where ΔF Raster is ΔF GlobalFor example, for an NR operating frequency band with a 100 kHz channel raster, ΔF Raster =20×ΔF Global For example, operating bands n1 and n2. For the channel raster and applicable NR-ARFCNs of each operating band in an NR system, see Table 5.4.2.3-1 in 3GPP TS38.101-1 V17.3.0. For the NR-ARFCNs allowed in frequency bands n46 and n47, see Tables 5.4.2.3-2 and 5.4.2.3-3 in 3GPP TS38.101-1 V17.3.0, respectively. Due to length limitations, Table 4 is only an excerpt from Table 5.4.2.3-1.

[0128] [Table 4]

[0129] For the mapping between the RF reference frequency and the corresponding resource element on the channel raster, see Table 5. The location of the RF channel may be determined based on the mapping relationship shown in Table 5. The mapping is performed based on the total number N of resource blocks (RBs) allocated to the RF channel. RB For example, the total number of resource blocks allocated to the RF channel, N RB If , is even, the RF channel is assigned to that physical resource block Index but

[0130]

number

[0131] and its resource element index is k=0. Alternatively, the total number of resource blocks allocated to the RF channel N RB If is odd, then the RF channel has its physical resource block index

[0132]

number

[0133] and is placed on the resource element whose resource element index is k=6.

[0134] The mapping relationship between the RF reference frequencies and the resource elements is applicable to the uplink (UL) and downlink (DL) in the NR system.

[0135] [Table 5]

[0136] a mod b represents the remainder obtained by dividing a by b.

[0137] In order to facilitate understanding of the embodiments of the present application, the following several explanations are provided.

[0138] First, in the following embodiments, the first number, the second number, and various numbers are simply used for distinction to facilitate the description, and are not used to limit the scope of the embodiments of the present application. For example, distinctions are made between various devices, frequency units, and channel rasters.

[0139] Secondly, the "protocol" included in the embodiments of the present application may refer to a standard protocol in the communication field, for example, may include LTE protocol, NR protocol, and related protocols applied to future communication systems, which is not limited in the present application.

[0140] Thirdly, in the embodiments of the present application, the descriptions such as "when", "in a certain case" and "if" all mean that the device (e.g., network device or terminal device) executes the corresponding processing in an objective case, and do not limit the time. In addition, the device (e.g., network device or terminal device) does not necessarily need to execute the decision action during implementation, which does not mean that there is another restriction.

[0141] The sidelink transmission method provided in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0142] It should be understood that for ease of understanding and explanation only, the interaction between the first device and the second device is used below as an example to describe in detail the method provided in the embodiment of the present application.

[0143] The first device may be, for example, the above-mentioned tag or a tag-related device (or a device having a tag-related function). Device The second device may be a terminal device in which the above-mentioned reader, reader-related device (or reader-related function) is installed. Device ) may be a terminal device in which a tag-related device is deployed, or a network device in which a reader-related device is deployed. If the first device is a terminal device in which a tag-related device is deployed and the second device is a terminal device in which a reader-related device is deployed, the first device may be the terminal device 125 or 126 in FIG. 1, and the second device may be the terminal device 124 in FIG. 1. If the first device is a terminal device in which a tag is deployed and the second device is a network device in which a reader is deployed, the first device may be any one of the terminal devices 121 to 123 in FIG. 1, and the second device may be the network device 111 in FIG. 1, or the first device may be the terminal device 127 or 128 in FIG. 1, and the second device may be the network device 112 in FIG. 1.

[0144] The first device may be, for example, the above-mentioned wake-up machine, or a terminal device in which the wake-up machine is deployed. The second device may be, for example, a network device (for example, a base station or an AP, etc.), or a terminal device. When the first device is a terminal device in which the wake-up machine is deployed and the second device is a terminal device, the first device may be the terminal device 125 or 126 in FIG. 1, and the second device may be the terminal device 124 in FIG. 1. When the first device is a terminal device in which the wake-up machine is deployed and the second device is a network device, the first device may be any one of the terminal devices 121 to 123 in FIG. 1, and the second device may be the network device 111 in FIG. 1, or the first device may be the terminal device 127 or 128 in FIG. 1, and the second device may be the network device 112 in FIG. 1.

[0145] The embodiment of the present application further includes a third device. The first device communicates with the second device and the third device separately through different frequency units. The third device may be a network device or a terminal device. This is not limited in the present application.

[0146] However, it should be understood that this does not constitute any limitation on the execution body of the method provided in the present application. Any device capable of executing the method provided in the embodiment of the present application by executing a program recording the code of the method provided in the embodiment of the present application can be used as the execution body of the method provided in the embodiment of the present application. For example, the first device shown in the following embodiment can be replaced by a component in the first device, such as a chip, a chip system, or another function module that can call a program and execute a program. The second device can be replaced by a component in the second device, such as a chip, a chip system, or another function module that can call a program and execute a program. The third device can be replaced by a component in the third device, such as a chip, a chip system, or another function module that can call a program and execute a program.

[0147] Figure 8 is a schematic interaction flow chart showing a communication method 400 according to an embodiment of the present application. As shown in Figure 8, the method 400 may include some or all of steps S410-1, S410-2, S420-1, and S420-2. Each step in the method 400 will be described in detail below.

[0148] S410-1: A first device determines a first frequency unit.

[0149] S410-2: The second device determines the first frequency unit.

[0150] S420-1: A first device transmits a downlink signal on a first frequency unit to a second device. In response, the second device receives a downlink signal from the first device on the first frequency unit.

[0151] S420-2: The second device transmits an uplink signal on the first frequency unit to the first device, and in response, the first device receives an uplink signal from the second device on the first frequency unit.

[0152] In other words, it is determined that the first frequency unit is to be used for communication between the first device and the second device, which may be the transmission of a signal or the reception of a signal.

[0153] The execution of S410-1 and S410-2 does not follow a specific order in this application. If the second device needs to determine the first frequency unit based on the configuration of the first device, S410-2 may be executed before S410-1.

[0154] Either S420-1 or S420-2 may be executed, or S420-1 and S420-2 may be executed sequentially. For example, after receiving a downlink signal transmitted by a first device, a second device transmits an uplink signal to the first device. In this way, the first device communicates with the second device on a first frequency unit.

[0155] The granularity of the first channel raster corresponding to the first frequency unit is equal to or smaller than the granularity of the second channel raster corresponding to the second frequency unit. The second frequency unit is used for communication between the first device and the third device. Number of The units are arranged in the same operating band.

[0156] The first frequency unit may be a carrier or a BWP. For example, when the first device communicates with the second device based on a passive IoT technology, the first frequency unit may be a carrier configured for passive IoT (shortly referred to as a passive IoT carrier). As another example, when the first device communicates with the second device based on a WUR technology, the first frequency unit may be a carrier configured for WUR (shortly referred to as a WUR carrier). The passive IoT carrier and the WUR carrier may be the same carrier or different carriers.

[0157] The first frequency unit may be a frequency unit used for uplink transmission, e.g., an uplink frequency unit. Alternatively, the first frequency unit may be a frequency unit used for downlink transmission, e.g., a downlink frequency unit. Alternatively, the first frequency unit includes a frequency unit used for uplink transmission and a frequency unit used 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. In other words, the first frequency unit is a frequency unit used for both uplink transmission and downlink transmission.

[0158] If the first frequency unit is an uplink frequency unit, S420-2 may include: the first device receives an uplink signal from the second device on the uplink frequency unit. In response, the second device transmits an uplink signal to the first device on the uplink frequency unit. If the first frequency unit is a downlink frequency unit, S420-1 may include: the first device transmits a downlink signal to the second device on the downlink frequency unit. In response, the second device receives a downlink signal from the first device on the downlink frequency unit. If the first frequency unit includes an uplink frequency unit and a downlink frequency unit, the first device transmits a downlink signal to the second device on the downlink frequency unit in the first frequency unit, and receives an uplink signal from the second device on the uplink frequency unit in the first frequency unit.

[0159] If the first frequency unit is a WUR carrier, the downlink signal may be, for example, a wake-up signal, and the first device may transmit the wake-up signal to the second device on the downlink frequency unit.

[0160] 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 backscattered signal based on the carrier signal. For example, the first device transmits a carrier signal to the second device on the downlink frequency unit, and receives the backscattered signal transmitted by the second device on the uplink frequency unit in a backscattered communication scheme based on the carrier signal. In this case, the carrier signal transmitted by the first device and the backscattered signal transmitted by the second device overlap in the time domain.

[0161] The difference between the carrier signal and the downlink signaling / data is that the carrier signal may be used to provide a carrier for uplink backscattering or provide energy for passive tags, the waveform corresponding to the carrier signal may be a sine or cosine wave at a given frequency, or amplitude and / or phase modulation is not performed on the waveform corresponding to the carrier signal, or amplitude and / or phase modulation is performed on the waveform corresponding to the carrier signal, but the overall amplitude is not received as the transmitted data. believer side Amplitude and / or phase modulation is performed on a waveform corresponding to downlink signaling / downlink data, and the overall amplitude is sufficient to be interpreted by a receiver as transmitted data.

[0162] It may be understood that before the second device communicates with the first device, the second device may determine the first frequency unit or may obtain the first frequency unit from the first configuration information transmitted and received by the first device.

[0163] The second frequency unit may be a carrier. For example, the second frequency unit may be an NR carrier configured in the NR system. Like the first frequency unit, the second frequency unit may be a frequency unit used for uplink transmission, or may be a frequency unit used for downlink transmission, or may include a frequency unit used for uplink transmission and a frequency unit used for downlink transmission.

[0164] When the first frequency unit includes uplink frequency units and downlink frequency units, the first frequency unit and the second frequency unit being arranged in the same operating band may mean that the uplink frequency units in the first frequency unit and the second frequency unit are arranged in the same operating band, or the downlink frequency units in the first frequency unit and the second frequency unit are arranged in the same operating band, or the uplink frequency units and the second frequency units in the first frequency unit and the downlink frequency unit are all arranged in the same operating band.

[0165] When the first frequency unit includes an uplink frequency unit and a downlink frequency unit, and the second frequency unit includes a frequency unit used for uplink transmission and a frequency unit used for downlink transmission, the first frequency unit and the second frequency unit being arranged in the same operating band may include at least one of the following examples.

[0166] Example 1: An uplink frequency unit in a first frequency unit and a frequency unit in a second frequency unit that is used for uplink transmission are arranged in the same operating band. Example 2: A downlink frequency unit in a first frequency unit and a frequency unit in a second frequency unit that is used for downlink transmission are arranged in the same operating band. Example 3: An uplink frequency unit in a first frequency unit and a frequency unit in a second frequency unit that is used for downlink transmission are arranged in the same operating band. Example 4: A downlink frequency unit in a first frequency unit and a frequency unit in a second frequency unit that is used for uplink transmission are arranged in the same operating band.

[0167] When the first frequency unit and the second frequency unit are arranged in the same operating band, including at least three of Examples 1 to 4, it indicates that the uplink frequency units and downlink frequency units in the first frequency unit, and the frequency units used for uplink transmission and the frequency units used for downlink transmission in the second frequency unit are all arranged in the same operating band.

[0168] Assuming that the communication method 400 is applied to an NR communication system, the operating band in which the first frequency unit and the second frequency unit are located may be, for example, the NR operating band in Table 1. For example, both the first frequency unit and the second frequency unit may be deployed in an operating band corresponding to n1.

[0169] Optionally, the first frequency unit may have various deployment modes. See Figures 9a to 9c. The second frequency unit (e.g., NR carrier, etc.) includes a transmission bandwidth (e.g., NR transmission bandwidth, etc.) and a guard band (e.g., NR guard band, etc.). The transmission bandwidth of the second frequency unit is N RB RBs, e.g., RB #0 through RB #N RB 9a, the first frequency unit may be deployed in the transmission bandwidth of the second frequency unit, and the first frequency unit may occupy one or more RBs in the second frequency unit. As shown in FIG. 9a, the first frequency unit occupies RB #1 in the second frequency unit. Alternatively, the first frequency unit may be deployed in the guard band of the second frequency unit. See FIG. 9b. Alternatively, the frequency domain interval between the first frequency unit and the second frequency unit is less than a threshold. See FIG. 9c. Referring to FIG. 9a to FIG. 9c, the resource elements in the first frequency unit that correspond to the first channel raster in the first frequency unit may be resource elements in the first frequency unit, and the index of the RB in which the resource element is located may be expressed as the formula in Table 5.

[0170]

number

[0171] Can satisfy the above requirements,

[0172]

number

[0173] It can be understood that r is the number of RBs included in the transmission bandwidth of the first frequency unit. The resource elements in the second frequency unit, which correspond to the second channel raster in the second frequency unit, can be resource elements in the second frequency unit, and the index of the RB in which the resource element is located is expressed by the formula in Table 5.

[0174]

number

[0175] can be satisfied.

[0176] Regarding the relative position relationship between the first frequency unit and the second frequency unit deployed in the frequency domain, the frequency domain resource relationship between the first frequency unit and the second frequency unit further includes the following three possible examples.

[0177] In a first example, when a first frequency unit is deployed in the transmission bandwidth of a second frequency unit, the boundaries of RBs in the first frequency unit need to be aligned with the boundaries of RBs in the second frequency unit to avoid causing resource fragmentation and reducing spectral utilization efficiency.

[0178] In a second example, when a first frequency unit is deployed in the guard band of a second frequency unit, the boundaries of the subcarriers in the first frequency unit may be aligned with the boundaries of the subcarriers in the second frequency unit to avoid interference caused to data transmission in the transmission bandwidth of the second frequency unit because the subcarriers are non-orthogonal. 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 if the boundaries of the RBs in the first frequency unit are not aligned with the boundaries of the RBs in the second frequency unit, the spectrum utilization efficiency of the second frequency unit is not affected. Therefore, it may not be limited whether the boundaries of the RBs in the first frequency unit are aligned with the boundaries of the RBs in the second frequency unit.

[0179] In a 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 second example, the subcarrier boundaries in the first frequency unit may be aligned with the subcarrier boundaries in the second frequency unit, and there is no restriction on whether the RB boundaries in the first frequency unit are aligned with the RB boundaries in the second frequency unit.

[0180] The deployment modes of the first frequency unit in the second and third examples may be referred to as deployment outside the transmission bandwidth hereinafter.

[0181] The frequency position where the first channel raster in the first frequency unit is located corresponds to the frequency position of the resource element in the first frequency unit. The index of the position of the resource element in the frequency domain can be determined by using the following two examples.

[0182] Example 1: The index of the location of the resource element in the frequency domain may be determined based on the transmission bandwidth of the first frequency unit. As shown in Table 5, when the transmission bandwidth of the first frequency unit is N' RB Assume that the number of RBs is N'. RBis odd (i.e., N' RB mod 2=1), then the resource element index is 6 and the physical resource block index is

[0183]

number

[0184] N' RB is even (i.e., N' RB mod 2=0), then the resource element index is 0 and the physical resource block index is

[0185]

number

[0186] For example, in FIG. 9a, the frequency location corresponding to the first channel raster is the physical resource block index

[0187]

number

[0188] and the resource element index is 6.

[0189] Example 2: The index of the location of the resource element in the frequency domain is the transmission bandwidth N of the second frequency unit RB As shown in Table 5, the transmission bandwidth of the first frequency unit can be determined based on N RB Includes RBs. N RB is odd (i.e., N RB mod 2=1), then the resource element index is 6 and the physical resource block index is

[0190]

number

[0191] N RB is even (i.e., N RB mod 2=0), then the resource element index is 0 and the physical resource block index is

[0192]

number

[0193] It is.

[0194] It can be understood that Example 1 is applicable to the scenarios in the first, second, or third examples. Specifically, if the first frequency unit is deployed in the transmission bandwidth of the second frequency unit or the guard 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 first device may determine the location of the resource element corresponding to the first channel raster based on the transmission bandwidth of the first frequency unit, i.e., determine the first frequency unit. Example 2 is generally applicable to the scenarios in the first example. Specifically, if the first frequency unit is deployed in the transmission bandwidth of the second frequency unit or the guard 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 first device may determine the location of the resource element corresponding to the first channel raster based on the transmission bandwidth of the first frequency unit, i.e., determine the first frequency unit. width In the case where the first device is deployed in the first frequency unit, the first device may be considered to determine the location of the resource element corresponding to the first channel raster, i.e., determine the first frequency unit, based on the transmission bandwidth of the second frequency unit. In the following, the scenarios in the first example, the second example, and the third example, the determination manner of the first frequency unit in the first example and the second example, and the granularity of the channel raster are further described to ensure spectrum usage efficiency and prevent subcarriers from becoming non-orthogonal, while making the deployment of the first frequency unit more flexible.

[0195] In this embodiment of the present application, the granularity of the first channel raster corresponding to the first frequency unit may be the same as or different from the granularity of the channel raster corresponding to the second frequency unit. In this embodiment of the present application, the granularity of the first channel raster is equal to or smaller than the granularity of the second channel raster, in order to avoid a case where the granularity of the first channel raster is too large, which reduces the flexibility of deploying the first frequency unit.

[0196] With reference to a first example and FIG. 10, the flexibility of deploying the first frequency unit is explained based on the case where the granularity of the first channel raster is the same as the granularity of the second channel raster.

[0197] As shown in FIG. 10, the number N of RBs occupied by the second frequency unit (e.g., NR carrier, etc.) RB is an odd number, in other words, N RB mod 2=1. For example, the number N of RBs included in the transmission bandwidth of the second frequency unit in (a) can be RB is equal to 2N+1. Or, the number of RBs occupied by the second frequency unit, N RB is an even number, in other words, N RB mod 2=0. For example, the number N of RBs included in the transmission bandwidth of the second frequency unit in (b) may be RB is equal to 2N. The position of the arrow is the frequency position of the second frequency unit, in other words, the frequency position of the resource element in the second frequency unit, which corresponds to the frequency position where the second channel raster is arranged. For example, the number N of RBs included in the transmission bandwidth of the second frequency unit RB is equal to 2N+1, the frequency position where the second channel raster is located corresponds to RE #6 of RB #N. As another example, the number N of RBs included in the transmission bandwidth of the second frequency unit RB is equal to 2N, the frequency location where the second channel raster is located corresponds to RE #0 of RB #N.

[0198] As shown in FIG. 10, the number N′ of RBs occupied by the first frequency unit RB is also an odd number, in other words, N' RB mod 2=1. For example, the number N' of RBs included in the transmission bandwidth of the first frequency unit in (c) may be RB is equal to 2M+1. Alternatively, the number N' of RBs occupied by the first frequency unit is equal to RB is an even number, in other words, N' RB mod 2=0. For example, the number N' of RBs included in the transmission bandwidth of the first frequency unit in (d) is RB is equal to 2M. The position of the arrow is the frequency position of the first frequency unit, in other words, the frequency position of the resource element in the first frequency unit, which corresponds to the frequency position where the first channel raster is arranged. For example, the number N' of RBs included in the transmission bandwidth of the first frequency unit RB is equal to 2M+1, the frequency position where the first channel raster is located corresponds to RE #6 of RB #M. As another example, the number N of RBs included in the transmission bandwidth of the first frequency unit RB is equal to 2M, the frequency location where the first channel raster is located corresponds to RE #0 of RB #M.

[0199] Both M and N are positive integers. Typically, M is less than or equal to N.

[0200] As shown in (a), (b), (c) and (d) in FIG. 10, four scenarios regarding the parity of the number of RBs occupied by the first frequency unit and the second frequency unit, respectively, can be obtained. For example, N RB The parity of N' RB For example, for the second frequency unit, see (a). For the first frequency unit, see (b). 、( For the second frequency unit, see (b). For the first frequency unit, see (d). For N RB The parity of N'RB For example, for the second frequency unit, see (a). For the first frequency unit, see (b). 、( For the second frequency unit, see (b), and for the first frequency unit, see (c).

[0201] Based on the four scenarios mentioned above, we use an example in which the subcarrier spacing is 15 kHz, the first channel raster and the second channel raster are both 100 kHz, and the bandwidth of the RB is 180 kHz. If it is certain that the boundaries of the RBs in the first frequency unit are aligned with the boundaries of the RBs in the second frequency unit, the possible values ​​of the frequency f corresponding to the first channel raster are p is shown in Table 6. k, n, and m are all integers, k*100 is the frequency corresponding to the second channel raster, and m*180 represents an integer multiple of the bandwidth of the RB.

[0202] [Table 6]

[0203] As shown in Table 6, it is assumed that within the transmission bandwidth of the second frequency unit, the index of the central resource block (RB) is 0, the index of the RB whose frequency is higher than that of the RB is a positive value, and the index of the RB whose frequency is lower than that of the RB is a negative value. If the parity of 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. m represents the index of the RB. N RB The parity of is N' RB , indicating that the central RB within the transmission bandwidth of the second frequency unit may be used to deploy the first frequency unit, and positions in intervals of 5 RBs may be used to deploy the first frequency unit.RB The parity of is N' RB If the parity of the first frequency unit does not match, then no frequency location that can be used to deploy the first frequency unit can be found in the NR carrier.

[0204] In some embodiments, according to the method provided in Example 2, in order to avoid a case in which the first frequency unit cannot be configured when the parity of the number of RBs included in the transmission bandwidth of the first frequency unit does not match the parity of the number of RBs included in the transmission bandwidth of the second frequency unit, in other words, in order to avoid a case in which the boundaries of the RBs in the first frequency unit are not aligned with the boundaries of the RBs in the second frequency unit due to the configuration of the first frequency unit when the parity of the number of RBs included in the transmission bandwidth of the first frequency unit does not match the parity of the number of RBs included in the transmission bandwidth of the second frequency unit, the index of the position in the resource element in the frequency domain may be determined based on the transmission bandwidth of the second frequency unit.

[0205] However, referring to Table 6, even if the parity of the number of RBs included in the transmission bandwidth of the first frequency unit does not match the parity of the number of RBs included in the transmission bandwidth of the second frequency unit, the frequency positions in the second frequency unit that can be used to configure the first frequency unit are significantly limited. In order to further improve the flexibility of deploying the first frequency unit, this embodiment considers further reducing the granularity of the first channel raster.

[0206] For example, see Table 6. p The value of m in the formula is set to 0, 1, 2, 3, ..., and the value of n is set. The deviation between k*100±m*180 or k*100±(m*180+90) and n*100 is calculated to obtain a deviation of 0, ±10, ±20, ±30, ±40, or ±50 (kHz). In this case, in order to deploy the first frequency unit at any RB position in the second frequency unit, the first channel raster is Granularity can be set to 10 kHz.

[0207] First Channel Raster Granularity It should be understood that the granularity of the first channel raster being 10 kHz is merely an example and does not constitute any limitation to the present application. When the granularity of the first channel raster is less than the granularity of the second channel raster, multiple values ​​for the granularity of the first channel raster can all improve the flexibility of deploying the first frequency units. For example, the granularity of the first channel raster can alternatively be 5 kHz, 20 kHz, or the like.

[0208] For example, in the four scenarios combining (a) and (b) with (c) and (d) in FIG. 10, an example is used in which the subcarrier spacing is 30 kHz, both the first channel raster and the second channel raster are 100 kHz, and the bandwidth of the RB is 180 kHz. When it is ensured that the boundaries of the RBs in the first frequency unit are aligned with the boundaries of the RBs in the second frequency unit, possible values ​​of the frequency corresponding to the first channel raster are shown in Table 7.

[0209] [Table 7]

[0210] Referring to Table 7, the frequency f corresponding to the first channel raster p It can be further understood through analysis that the deviation between the possible values ​​of and an integer multiple of 100 kHz is 0, ±20, and ±40 (kHz). In order to deploy the first frequency unit at any RB position in the second frequency unit, the granularity of the first channel raster can be set to 20 kHz. Indeed, the first channel raster Granularity may alternatively be set to 10 kHz or 5 kHz.

[0211] If the subcarrier spacing is 60 kHz, the frequency f pThe deviation between the possible values ​​of and integer multiples of 100 kHz is the same as that obtained when the subcarrier spacing is 30 kHz. In other words, when the subcarrier spacing is 60 kHz, the granularity of the first channel raster can still be 5 kHz, 10 kHz, or 20 kHz.

[0212] 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 may determine the number of RBs included in the transmission bandwidth of the first frequency unit based on 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. In this way, the flexibility of deploying the first frequency unit is improved.

[0213] In the example related to Figure 10 and Table 6, the scenario in the first example, specifically, the scenario in which the first frequency unit is deployed in the transmission bandwidth of the second frequency unit, is mainly used as an example for explanation. In the following, the scenario in the second example or the third example, specifically, the scenario in which the first frequency unit is deployed in the guard 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, is used as an example for explanation.

[0214] As described above, when a first frequency unit is deployed in the guard band of a second frequency unit or the frequency domain spacing between the first frequency unit and the second frequency unit is less than a threshold, the boundaries of the subcarriers in the first frequency unit are aligned with the boundaries of the subcarriers in the second frequency unit to avoid interference caused to data transmission within the transmission bandwidth of the second frequency unit because the first frequency unit and the second frequency unit are not orthogonal.

[0215] Assume that the granularity of the first channel raster and the granularity of the second channel raster are both 100 kHz and the subcarrier spacing is 15 kHz. In the following, with reference to Table 8, we analyze available frequency positions that satisfy the condition that the channel raster is an integer multiple of 100 kHz.

[0216] [Table 8]

[0217] Table 8 shows only the analytical results by using an example where the transmission bandwidth of the NR carrier is 5 MHz and 10 MHz. It is assumed that within the transmission bandwidth of the second frequency unit, the frequency corresponding to the RB at the center RB position is 0 Hz, the frequency of the RB whose frequency is higher than that RB is a positive value, and the frequency of the RB whose frequency is lower than that RB is a negative value. p It can be seen from Table 8 that the quantity of values ​​is quite limited. For example, if the transmission bandwidth of the second frequency unit is 5 MHz and the first frequency unit is Number of If the number of RBs included in the transmission bandwidth of a unit is an even number, the first frequency unit is f p =± 2250 (kHz). If the transmission bandwidth of the second frequency unit is a different value, f p Each possible position of f can be calculated by using a similar method. Due to length limitations, examples are not described one by one in this specification. In a similar manner, if the transmission bandwidth of the second frequency unit is another value, f p It can be concluded that the frequency positions that satisfy the condition that is an integer multiple of 100 kHz are also quite limited, in other words, the positions where the first frequency unit can be deployed are quite limited.

[0218] Further analysis reveals that the frequency f pFor possible values ​​that are shown in Table 8, and possible values ​​that are not shown in Table 8 but are obtained through calculation in a similar manner, the frequency f corresponding to the first channel raster is p and an integer multiple of 100 kHz, the deviation between the first frequency unit and the integer multiple of 100 kHz is 0, ±5, ±10, ±15, ±20, ±25, ±30, ±35, ±40, ±45, and ±50 (kHz). In order to deploy the first frequency unit at any position within the guard band of the second frequency unit, the granularity of the first channel raster may be 5 kHz. In Table 9, the second frequency unit is used as a possible example as an NR carrier. Due to length limitations, only the operating bands n1, n2, n3, and n5 are listed in the table. It should be understood that for another operating band in which the granularity of the second channel raster (e.g., NR channel raster) is 100 kHz, the granularity of the first channel raster is also applicable as 5 kHz.

[0219] [Table 9]

[0220] For the same reasons as above, the subcarrier interval is 30 kHz, the frequency f p The deviation between f and an integer multiple of 100 kHz is 0, ±10, ±20, ±30, ±40, and ±50 (kHz). In this case, the granularity of the first channel raster may be 10 kHz, or more precisely, 5 kHz. If the subcarrier spacing is 60 kHz, the frequency f corresponding to the first channel raster is p and an integer multiple of 100 kHz, the deviations are 0, ±20, and ±40 (kHz). In this case, the granularity of the first channel raster may be 20 kHz, or more precisely 5 kHz or 10 kHz.

[0221] Based on Tables 6 to 9 and related examples, the granularity of the first channel raster is related to at least one of the deployment mode of the first frequency unit and the subcarrier spacing of the first frequency unit. Based on this, the first device may determine the granularity of the first channel raster based on at least one of the deployment mode of the first frequency unit and the subcarrier spacing of the first frequency unit.

[0222] It should be noted that the subcarrier spacing of the first frequency unit may be a subcarrier spacing agreed upon by the first frequency unit or may be a subcarrier spacing configured in the first frequency unit.

[0223] For example, the correspondence between the channel raster of the first frequency unit and the subcarrier spacing of the first frequency unit may include: (1) The subcarrier spacing is 15 kHz and the channel raster is 5 kHz; (2) the subcarrier spacing is 30 kHz and the channel raster is 10 kHz; and (3) The subcarrier spacing is 60 kHz and the channel raster is 20 kHz.

[0224] As another example, the correspondence between the channel raster of the first frequency unit, the subcarrier spacing of the first frequency unit, and the deployment mode of the first frequency unit may include: (1) the subcarrier spacing is 15 kHz, the deployment is within the transmission bandwidth, and the channel raster is 10 kHz; (2) the subcarrier spacing is 15 kHz, the deployment is outside the transmission bandwidth, and the channel raster is 5 kHz; (3) the subcarrier spacing is 30 kHz, the deployment is within the transmission bandwidth, and the channel raster is 20 kHz; (4) the subcarrier spacing is 30 kHz, the deployment is outside the transmission bandwidth, and the channel raster is 10 kHz; (5) the subcarrier spacing is 60 kHz, the deployment is within the transmission bandwidth, and the channel raster is 20 kHz; and (6) The subcarrier spacing is 60 kHz, the deployment is outside the transmission bandwidth, and the channel raster is 20 kHz.

[0225] The correspondence may be predefined or preconfigured. The first device may determine the granularity of the first channel raster based on the correspondence. Alternatively, the granularity of the first channel raster may be an integer multiple of a predefined value, for example, 5 kHz, 10 kHz, or 20 kHz.

[0226] In some embodiments, the radio frequency reference frequency F corresponding to the first frequency unit REF satisfies the following. That is, F REF =F REF-Offs +ΔF Global (N REF -N REF-Offs )+offset. F REF-Offs is the radio frequency reference frequency offset value, and ΔF Global is the granularity of the global channel raster, and N REF is NR-ARFCN, and N REF-Offs is the NR-ARFCN offset value, and offset is the frequency offset.

[0227] F REF-Offs and N REF-Offs For values, see Table 10.

[0228] [Table 10]

[0229] For example, the offset value can be one of {-50,-45,-40,-35,-30,-25,-20,-15,-10,-5,0,5,10,15,20,25,30,35,40,45,50} kHz.

[0230] For example, 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 transmitted by the first device. Optionally, the fourth device may be a network device, for example, a base station or a macro base station.

[0231] Therefore, in this embodiment of the application, when communicating with various devices, the first device determines a first frequency unit used for communication between the first device and the second device. The first frequency unit and the second frequency unit used for communication between the first device and the third device are located in the same operating band, and the granularity of the first channel raster corresponding to the first frequency unit is equal to or smaller than the granularity of the second channel raster. The embodiment of the application provides a solution for determining the frequency unit, so that the first device can communicate with the second device via the first frequency unit. Furthermore, when the frequency unit is determined, the granularity of the channel raster is taken into account, for example, the granularity of the first channel raster corresponding to the first frequency unit is set to a smaller value to improve the flexibility of deploying the first frequency unit.

[0232] In some communication systems (e.g., LTE systems, etc.), in order to reduce the problem of direct current (DC) subcarrier performance degradation due to local oscillator feedthrough on the network equipment side or terminal equipment side, one DC subcarrier is reserved in the downlink frequency unit and is not used to transmit information, and the uplink carrier is totally offset by half a subcarrier (e.g., 7.5 kHz, etc.). In some other communication systems (e.g., NR systems, etc.), the problem of DC subcarrier performance degradation due to local oscillator feedthrough is handled via the network equipment or terminal equipment, but the DC subcarrier is not reserved in the downlink carrier, and the uplink carrier is not totally offset by half a subcarrier. When the above-mentioned two communication systems (e.g., LTE systems and NR systems, etc.) share spectrum resources, the downlink frequency units in the two communication systems are not offset, so that the subcarrier boundaries are aligned. However, in two communication systems, the uplink frequency units in one communication system are offset by half a subcarrier while the uplink frequency units in the other communication system are not offset, resulting in mutual interference between the communication systems during data transmission because the boundaries of the subcarriers in the two communication systems are not aligned (i.e., the subcarriers are not orthogonal).

[0233] In the following, an example is used to explain how to determine the first frequency unit in the shared spectrum.

[0234] 11 is an interaction flow chart illustrating a communication method 500 according to an embodiment of the present application. As shown in FIG. 11, the communication method 500 further includes some or all of the following steps:

[0235] S510: The first device determines an uplink offset and / or a downlink offset based on at least one of a type of frequency band in which the downlink frequency unit is located, a first capability of the second device, a type of the second device, a type of time domain resource in which the signal carried by the downlink frequency unit is located, and a type of time domain resource in which the signal carried by the uplink frequency unit is located.

[0236] S520-1: A first device determines an uplink frequency unit based on an uplink frequency position and an uplink offset.

[0237] S520-2: The second device determines an uplink frequency unit based on the uplink frequency position and the uplink offset.

[0238] S530-1: The first device determines a downlink frequency unit based on a downlink frequency position and a downlink offset.

[0239] S530-2: The second device determines a downlink frequency unit based on the downlink frequency position and the downlink offset.

[0240] S540-1: A first device transmits a downlink signal on a downlink frequency unit to a second device, in response to which the second device receives a downlink signal from the first device on the downlink frequency unit.

[0241] S540-2: The second device transmits an uplink signal on the uplink frequency unit to the first device, in response to which the first device receives an uplink signal from the second device on the uplink frequency unit.

[0242] The execution of S520-1, S520-2, S530-1, and S530-2 does not follow any particular order in this embodiment.

[0243] Either S540-1 or S540-2 may be executed, or S540-1 and S540-2 may be executed sequentially. For example, after receiving a downlink signal transmitted by a first device, the second device transmits an uplink signal to the first device.

[0244] As described above, the first frequency unit may include an uplink frequency unit used to transmit an uplink signal, and / or a downlink frequency unit used to transmit a downlink signal. In this case, in S410-1 in the embodiment shown in FIG. 8, the first device determining the first frequency unit may include the following: S520-1: The first device determines the uplink frequency unit based on the uplink frequency position and the uplink offset; and / or S530-1: The first device determines the downlink frequency unit based on the downlink frequency position and the downlink offset.

[0245] The uplink frequency location may be agreed upon in the protocol, or may be predefined by the first device, or may be preconfigured by the fourth device to the first device. This is not limited in this application. The downlink frequency location is similar, and will not be described in detail again. In passive IoT, there is usually a frequency domain interval between the uplink frequency location and the downlink frequency location. The frequency domain interval may also be agreed upon in the protocol, or may be predefined by the first device, or may be preconfigured by the fourth device to the first device.

[0246] Based on this, in this embodiment of the present application, the first device may first determine an uplink offset and / or a downlink offset based on S510, so that the first device determines a first frequency unit based on the uplink offset / downlink offset to avoid interference caused to data transmission due to subcarrier boundaries not being aligned between communication systems in the shared spectrum.

[0247] The type of frequency band in which 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, an SUL transmission frequency band, and a TDD transmission frequency band. Hereinafter, the uplink transmission frequency band in FDD mode and the SUL transmission frequency band are collectively referred to as the uplink transmission frequency band, and the downlink transmission frequency band in FDD mode and the SDL transmission frequency band are collectively referred to as the downlink transmission frequency band.

[0248] The first capability indicates whether the second device supports frequency shifting of the uplink signal to an uplink transmission frequency band other than the downlink transmission frequency band in which the downlink frequency unit is located.

[0249] For example, 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. For example, if the type of the second device is a passive tag, the second device does not have the capability to perform frequency shifting of the uplink signal to an uplink transmission frequency band other than the downlink transmission frequency band in which the downlink frequency unit is located.

[0250] The types of time domain resources may include, for example, uplink time domain resources (eg, uplink slots, etc.) and downlink time domain resources (eg, downlink slots, etc.) in TDD mode.

[0251] The following describes S510 by using some examples.

[0252] 1. The first device determines an uplink offset and / or a downlink offset based on at least one of a type of frequency band in which the downlink frequency unit is located and a first capability of the second device (or a type of the second device).

[0253] In one example, if the downlink frequency unit is located in a downlink transmission frequency band and the second device supports a frequency shift of the uplink signal to an uplink transmission frequency band other than the downlink transmission frequency band, the uplink offset is the first value or the second value. Alternatively, if the downlink frequency unit is located in a downlink transmission frequency band and the second device does not support a frequency shift of the uplink signal to an uplink transmission frequency band other than the downlink transmission frequency band, the uplink offset is the first value.

[0254] It should be noted that whether the second device supports frequency shifting of the uplink signal to an uplink transmission frequency band other than the downlink transmission frequency band may be indicated by a first capability in the second device or may be determined by the type of the second device.

[0255] As mentioned above, the downlink transmission frequency band may be the downlink transmission frequency band in FDD mode or may be the SDL transmission frequency band, and the uplink transmission frequency band may be the uplink transmission frequency band in FDD mode; or It may be the SUL transmission frequency band.

[0256] It should be understood that when the downlink transmission frequency band is a downlink transmission frequency band in an FDD mode and the uplink transmission frequency band is an uplink transmission frequency band in an FDD mode, the downlink transmission frequency band and the uplink transmission frequency band are arranged in the same operating band. For example, as shown in Table 1, the uplink transmission frequency band is an uplink operating band in the NR operating band n1, and the downlink transmission frequency band is a downlink operating band in the NR operating band n1. The NR operating band n1 is merely exemplary and may be replaced with an operating band corresponding to any FDD mode in Table 1, for example, n2, n3, ...

[0257] Indeed, the downlink transmission frequency band and the uplink transmission frequency band may not be paired transmission frequency bands, or the uplink transmission frequency band and the downlink transmission frequency band may be located in different operating bands, or the frequency band numbers (e.g., n1, n2, n3, ..., etc.) of the uplink transmission frequency band and the downlink transmission frequency band are different. For example, the downlink transmission frequency band is a downlink transmission frequency band in an FDD mode, and the uplink transmission frequency band is a SUL transmission frequency band. As another example, the downlink transmission frequency band is a downlink operating band in an NR operating band n1, and the uplink transmission frequency band is an uplink operating band in an NR operating band n2.

[0258] Further, the uplink transmission frequency band may be, for example, a spectrum shared with LTE. In this case, when the uplink transmission frequency band is used for LTE uplink communication, the uplink offset is set to a second value, which may be, for example, 7.5 kHz, to ensure that the subcarrier boundaries in the uplink frequency unit are aligned with the subcarrier boundaries in the LTE frequency unit. When the uplink transmission frequency band is not used for LTE uplink communication, the uplink offset is a first value, which may be, for example, 0.

[0259] For example, assume 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 a shared spectrum of NR and LTE. The above example will be described with reference to Figures 12a and 12b.

[0260] See Fig. 12a. The passive IoT downlink carrier is arranged in a downlink transmission frequency band, and the second device supports a frequency shift of the passive IoT uplink signal to an uplink transmission frequency band corresponding to the downlink transmission frequency band in which the passive IoT downlink carrier is arranged. In this case, both the passive IoT uplink carrier and the LTE uplink carrier are arranged in the uplink transmission frequency band. Therefore, the uplink offset of the passive IoT uplink carrier is 7.5 kHz. Indeed, if it is determined that the uplink transmission frequency band is not used for LTE uplink communication, the uplink offset may be 0. Optionally, the NR uplink carrier is the same as 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.

[0261] See Figure 12b. The passive IoT downlink carrier is located in a 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 other than the downlink transmission frequency band in which the passive IoT downlink carrier is located. In this case, if 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, the uplink offset of the passive IoT uplink carrier is 0.

[0262] In the above example, the downlink frequency unit is located in a downlink transmission frequency band, which is not used for LTE uplink communication, so the downlink offset may be zero.

[0263] In another example, when the downlink frequency unit is located in an uplink transmission frequency band, both the downlink offset and the uplink offset are the first value or the second value.

[0264] Further, the uplink transmission frequency band may be, for example, a spectrum shared with LTE. In this case, when the uplink transmission frequency band is used for LTE uplink communication, both the downlink offset and the uplink offset are set to a second value, which may be, for example, 7.5 kHz, to ensure that the boundaries of the subcarriers in the downlink frequency unit and the uplink frequency unit are aligned with the boundaries of the subcarriers in the LTE frequency unit. When the uplink transmission frequency band is not used for LTE uplink communication, both the downlink offset and the uplink offset are set to a first value, which may be, for example, 0.

[0265] For example, still assume 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 a shared spectrum of NR and LTE. The above example will be described with reference to FIG. 12c.

[0266] See Figure 12c. The passive IoT uplink carrier is located in the downlink transmission frequency band. In this case, the passive IoT downlink carrier, the passive IoT uplink carrier, and the LTE uplink carrier are all located in the uplink transmission frequency band. Therefore, both the downlink offset of the passive IoT downlink carrier and the uplink offset of the passive IoT uplink carrier are 7.5 kHz. Indeed, if it is determined that the uplink transmission frequency band is not used for LTE uplink communication, both the downlink offset and the uplink offset may be 0. Optionally, the NR downlink carrier is located in the downlink transmission frequency band. Therefore, the downlink offset of the NR downlink carrier may be 0. The NR uplink carrier is the same as 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.

[0267] 2. When the first frequency unit is located in the TDD operating band, the first device determines an uplink offset and a downlink offset based on a type of time domain resource in which a signal carried by the downlink frequency unit is located and a type of time domain resource in which a signal carried by the uplink frequency unit is located.

[0268] Example 1: When the downlink signal carried by the downlink frequency unit occupies the downlink time domain resource and the uplink signal carried by the uplink frequency unit occupies the uplink time domain resource, both the downlink offset and the uplink offset are a first value or a second value. For example, assume 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 a shared spectrum of NR and LTE. Referring to FIG. 13a, the passive IoT downlink signal is transmitted in the downlink slot, and the passive IoT uplink signal is transmitted in the uplink slot. In this case, both the passive IoT uplink signal and the LTE uplink signal are transmitted in the uplink slot. Therefore, both the uplink offset of the passive IoT uplink carrier and the downlink offset of the passive IoT downlink carrier are 7.5 kHz. Indeed, if it is determined that the uplink slot is not used for LTE uplink communication, both the uplink offset and the downlink offset may be 0. Optionally, the NR uplink carrier is the same as 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.

[0269] Example 2: A downlink signal carried by a downlink frequency unit; upIf both the NR uplink signal and the uplink signal carried by the LTE link frequency unit occupy the downlink time domain resource, both the downlink offset and the uplink offset are the first value. Still assume 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. With reference to Figure 13b, both the passive IoT downlink signal and the passive IoT uplink signal are transmitted in the downlink slot, and the downlink slot is not used for LTE uplink communication. Therefore, both the uplink offset of the passive IoT uplink carrier and the downlink offset of the passive IoT downlink carrier are 0.

[0270] Example 3: When both the downlink signal carried by the downlink frequency unit and the uplink signal carried by the uplink frequency unit occupy the uplink time domain resource, both the downlink offset and the uplink offset are a first value or a second value. Still assume 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. With reference to Figure 13c, both the passive IoT downlink signal and the passive IoT uplink signal are transmitted in the uplink slot. In this case, both the passive IoT uplink signal and the LTE uplink signal are transmitted in the uplink slot. Therefore, both the uplink offset of the passive IoT uplink carrier and the downlink offset of the passive IoT downlink carrier are 7.5 kHz. If it is determined that the uplink slot is not used for LTE uplink communication, both the uplink offset and the downlink offset may be 0. Optionally, the NR uplink carrier is the same as 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.

[0271] Optionally, in any one of the above-mentioned examples, in a passive IoT scenario, the downlink signal carried by the downlink frequency unit may be a carrier signal or downlink signaling / downlink data.

[0272] The uplink offset of an uplink frequency unit is the RF reference frequency (F RER) Similarly, the downlink offset of a downlink frequency unit may be an offset of the RF reference frequency corresponding to the downlink frequency unit.

[0273] For example, the first device may determine the downlink frequency unit based on the downlink frequency location and the downlink offset. For example, the first device determines the downlink frequency unit based on the sum of the downlink frequency location and the downlink offset. The uplink offset may be a positive value or a negative value.

[0274] For example, the first device may determine the uplink frequency unit based on the uplink frequency location and the uplink offset. For example, the first device may determine the uplink frequency unit based on the sum of the uplink frequency location and the uplink offset. Alternatively, the first device may determine the uplink frequency unit based on the downlink frequency location, the uplink offset, and the frequency domain spacing between the uplink frequency location and the downlink frequency location. For example, the first device may determine the uplink frequency unit based on the downlink frequency location, the uplink offset, and the sum of the frequency domain spacing between the uplink frequency location and the downlink frequency location. The uplink offset may be a positive value or a negative value, and the frequency domain spacing between the uplink frequency location and the downlink frequency location may be a positive value or a negative value.

[0275] Each portion of the frequency information for the downlink frequency location, the downlink offset, the uplink frequency location, the uplink offset, and the frequency domain spacing between the uplink frequency location and the downlink frequency location may be determined by the first device, or may be configured to the first device by the fourth device, or may be defined in a protocol, such that the first device can determine a first frequency unit based on some or all portions of the frequency information.

[0276] Optionally, the fourth device may send second configuration information to the first device, the second configuration information indicating at least one of the following: a downlink frequency location, a downlink offset, an uplink frequency location, an uplink offset, and a frequency domain spacing between the uplink frequency location and the downlink frequency location.

[0277] 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.

[0278] The second device may receive the first configuration information transmitted by the first device. The second device may determine the first frequency unit based on the first configuration information.

[0279] In some embodiments, the first configuration information may indicate a downlink frequency unit on which the second device may receive a downlink signal from the first device.

[0280] In some other embodiments, the first configuration information may indicate a frequency domain spacing between the downlink and uplink frequency locations, a downlink frequency unit, and an uplink offset. The second device may determine the uplink frequency unit based on the frequency domain spacing between the downlink and uplink frequency locations, 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 spacing between the downlink and uplink frequency locations, the downlink frequency unit, and the uplink offset.

[0281] In some other embodiments, the first configuration information may indicate an uplink frequency unit on which the second device may transmit an uplink signal to the first device.

[0282] Downlink frequency units, uplink frequency units, frequency domain spacing between downlink frequency locations and uplink frequency locations, downlink offset It should be noted that some or all of the frequency information of the uplink offset, as well as the frequency information of the uplink offset, may also be defined in the protocol or predefined by the second device. In this case, the first configuration information may not include some or all of the frequency information defined in the protocol and predefined by the second device.

[0283] In the embodiment shown in FIG. 11, the first device determines the first frequency unit based on an uplink offset and / or a downlink offset to avoid mutual interference caused to data transmission between communication systems because the subcarrier boundaries in the first frequency unit are not aligned with the subcarrier boundaries in another communication system (e.g., an LTE system, etc.) (i.e., the subcarriers are not orthogonal).

[0284] As described above, in a passive IoT communication scenario, in one aspect, the backscatter communication is used for the uplink transmission of the passive IoT, in other words, the second device receives the downlink carrier signal when transmitting the uplink backscatter signal. In this case, the uplink transmission signal and the downlink carrier signal overlap in the time domain, so that both the uplink transmission signal and the downlink carrier signal may be placed in the uplink time domain resource of the TDD transmission frequency band, or the TDD transmission frequency band may be placed in the uplink time domain resource of the TDD transmission frequency band. Bandwidth In the second aspect, the second device may be placed in the downlink time domain resource of the uplink backscattered signal relative to the downlink carrier signal. In the second aspect, the ability of the second device to perform a frequency shift on the uplink backscattered signal relative to the downlink carrier signal is limited. In other words, when the ability of the second device to perform a frequency shift is low, both the uplink frequency unit carrying the uplink signal and the downlink frequency unit carrying the downlink signal may be placed in the uplink transmission frequency band or the downlink transmission frequency band. In the above two aspects, there may be a problem of signal interference caused by different directions of receiving and transmitting between passive IoT and NR.

[0285] Regarding the above-mentioned problem, in this embodiment, in order to avoid the problem that the receiving and transmitting directions are different between the first frequency unit and the second frequency unit, it is considered that the frequency unit whose transmission direction is different from that of the second frequency unit is deployed in the guard band. See Figure 14a to Figure 14d.

[0286] Please refer to Figure 14a. The second frequency unit is a frequency unit used for uplink transmission, in other words, the second frequency unit is arranged in the uplink transmission frequency band. In this case, the direction of the uplink frequency unit in the first frequency unit is the same as the direction of the second frequency unit. The uplink frequency unit may be arranged in the transmission bandwidth of the second frequency unit, and the direction of the downlink frequency unit is different from the direction of the second frequency unit, so the downlink frequency unit in the first frequency unit is arranged in the guard band of the second frequency unit.

[0287] Please refer to Figure 14b. The second frequency unit is a frequency unit used for downlink transmission. In other words, the second frequency unit is arranged in the downlink transmission frequency band. Since the direction of the uplink frequency unit in the first frequency unit is different from that of the second frequency unit, the uplink frequency unit can be arranged in the guard band of the second frequency unit. Since the direction of the downlink frequency unit in the first frequency unit is the same as that of the second frequency unit, the downlink frequency unit can be arranged in the transmission bandwidth of the second frequency unit.

[0288] See Figure 14c. When a first frequency unit is located in the TDD operating band, and a downlink signal transmitted on the downlink frequency unit and an uplink signal transmitted on the uplink frequency unit, which corresponds to the downlink signal, both occupy downlink time domain resources, the downlink frequency unit is located in the transmission bandwidth of the second frequency unit, and the uplink frequency unit is located in the guard band of the second frequency unit.

[0289] See Figure 14d. When a first frequency unit is located in a TDD operating band, and a downlink signal transmitted on a downlink frequency unit and an uplink signal transmitted on an uplink frequency unit, which corresponds to the downlink signal, both occupy an uplink time domain resource, the downlink frequency unit is located in a guard band of a second frequency unit, and the uplink frequency unit is located in a guard band of the second frequency unit.

[0290] In this embodiment, for various scenarios in which the problem of different directions of receiving and transmitting may exist, the downlink frequency units and uplink frequency units in the first frequency unit are deployed separately in the transmission bandwidth or guard band of the second frequency unit to avoid signal interference caused by the different directions of receiving and transmitting between the first frequency unit and the second frequency unit.

[0291] Above, the method provided in the embodiment of the present application will be described in detail with reference to Fig. 8 to Fig. 14d. Below, the device provided in the embodiment of the present application will be described in detail with reference to Fig. 15 and Fig. 16.

[0292] 15 is a block diagram illustrating a communication device according to an embodiment of the present application. As shown in FIG. 15, the device 600 may include a transceiver unit 610 and a processing unit 620.

[0293] Optionally, the communication device 600 may correspond to the first device in the above-described method embodiments, and may be, for example, the first device or a component (e.g., a chip or a chip system, etc.) configured in the first device.

[0294] It should be understood that the communication device 600 may correspond to the first device in the methods shown in Figures 8 and 11 according to the embodiments of the present application. The communication device 600 may include units configured to execute the methods executed by the first device among the methods in Figures 8 and 11. Furthermore, the units in the communication device 600 and other operations and / or functions described above are used to implement corresponding procedures of the methods in Figures 8 and 11, respectively.

[0295] The communications device 600 may include a transceiver unit 610 and a processing unit 620. The transceiver unit 610 performs processing related to receiving and transmitting information, and the processing unit 620 performs processing in addition to receiving and transmitting information.

[0296] For example, when the communication device 600 is configured to perform the methods in FIG. 8 and FIG. 11, the processing unit 620 may be configured to determine a first frequency unit. The transceiver unit 610 may be configured to communicate with a second device on the first frequency unit. The granularity of the first channel raster corresponding to the first frequency unit is equal to or smaller than the granularity of the second channel raster corresponding to the second frequency unit. The second frequency unit is used for communication between the communication device and the third device. The first frequency unit and the second frequency unit may be configured to determine a first frequency unit. Number of The units are arranged in the same operating band.

[0297] The communications device 600 may alternatively correspond to the second device in the above-described method embodiments, and may be, for example, the second device or a component (e.g., a chip or chip system, etc.) configured in the second device.

[0298] The transceiver unit 610 in the communications device 600 may be implemented via a transceiver and may correspond, for example, to the transceiver 710 in the communications device 700 shown in Figure 16. The processing unit 620 in the communications device 600 may be implemented via at least one processor and may correspond, for example, to the processor 720 in the communications device 700 shown in Figure 16.

[0299] If the communication device 600 is a chip or chip system configured in a communication device (e.g., a first device or a second device), the transceiver unit 610 in the communication device 600 may be implemented through an input interface / output interface, circuit, or the like, and the processing unit 620 in the communication device 600 may be implemented via a processor, microprocessor, integrated circuit, or the like integrated in the chip or chip system.

[0300] FIG. 16 is another block diagram illustrating a communication device according to an embodiment of the present application. As shown in FIG. 16, 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 via an internal connection path. The memory 730 is configured to store instructions, and the processor 720 is configured to execute the instructions stored in the memory 730 to control the transceiver 710 to transmit and / or receive signals.

[0301] It should be understood that the communication device 700 may correspond to the first device or the second device in the above-mentioned method embodiments and may be configured to perform steps and / or procedures performed by the first device or the second device in the above-mentioned method embodiments. Optionally, the memory 730 may include read-only memory and random access memory to provide instructions and data to the processor. A portion of the memory may further include a non-volatile random access memory. The memory 730 may be a separate device or may be incorporated into the processor 720. The processor 720 may be configured to execute instructions stored in the memory 730, and when the processor 720 executes the instructions stored in the memory, the processor 720 is configured to execute steps and / or procedures corresponding to the first device or the second device in the above-mentioned method embodiments.

[0302] Optionally, the communication device 700 is the first device in the above-mentioned embodiments.

[0303] Optionally, the communication device 700 is the second device in the above-mentioned embodiments.

[0304] The transceiver 710 may include a transmitter and a receiver. The transceiver 710 may further include an antenna, and there may be one or more antennas. The processor 720, 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 on a baseband chip, and the transceiver 710 may be integrated on a radio frequency chip. The processor 720, the memory 730, and the transceiver 710 may alternatively be devices integrated on the same chip. This is not a limitation of the present application.

[0305] Optionally, the communication device 700 is a component, such as a chip or chip system, configured in a first device.

[0306] Optionally, the communications device 700 is a component, such as a chip or chip system, configured in a second device.

[0307] The transceiver 710 may alternatively be a communications interface, such as an input / output interface or circuit. The transceiver 710, the processor 720, and the memory 730 may be integrated into the same chip, for example, a baseband chip.

[0308] The present application further provides a processing device including at least one processor configured to execute a computer program stored in a memory to cause the processing device to perform a method performed by a first device in an embodiment of the method as described above or a method performed by a second device in an embodiment of the method as described above.

[0309] An embodiment of the present application further provides a processing device including a processor and an input interface / output interface. The input interface / output interface is coupled to the processor. The input interface / output interface is configured to input and / or output information. The information includes at least one of instructions and data. The processor is configured to execute a computer program to cause the processing device to perform a method performed by the first device in the method embodiments described above or a method performed by the second device in the method embodiments described above.

[0310] An embodiment of the present application further provides a processing device including a processor and a memory, the memory being configured to store a computer program, and the processor being configured to call the computer program from the memory and execute the computer program to cause the processing device to perform a method performed by a first device in the above-mentioned method embodiments or a method performed by a second device in the above-mentioned method embodiments.

[0311] It should be understood that a processing device can be one or more chips, for example, a processing device can be a field programmable gate array (FPGA), an application-specific integrated circuit (ASIC), a system on chip (SoC), a central processing unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or another integrated chip.

[0312] It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip and have signal processing capabilities. In the implementation process, the steps in the above-mentioned method embodiments may be implemented by using hardware integrated logic circuitry in the processor or by using instructions in the form of software. The processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), another programmable logic device, a discrete gate, a transistor logic device, or a discrete hardware component. The methods, steps, and logic block diagrams disclosed in the embodiments of the present application may be implemented or performed. The general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

[0313] It may be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be a read-only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically EPROM (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM) and is used as an external cache. By way of example and not of limitation, many forms of RAM may be used, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein may include, but is not limited to, these and any other suitable types of memory.

[0314] According to the method provided in the embodiment of the present application, the present application further provides a computer program product, which includes a computer program code, which, when executed on a computer, causes the computer to execute the method performed by the first device or the second device in the above-mentioned method embodiment.

[0315] According to the method provided in the embodiment of the present application, the present application further provides a computer-readable storage medium, which stores a program code, which, when executed on a computer, causes the computer to execute the method executed by the first device or the second device in the above-mentioned embodiment of the method.

[0316] According to the method provided in the embodiment of the present application, the present application further provides a communication system, which may include the above-mentioned first device and second device.

[0317] Those skilled in the art may recognize that the units and algorithm steps may be implemented by electronic hardware, or a combination of computer software and electronic hardware, in combination with the examples described in the embodiments disclosed herein. Whether a function is performed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but the implementation should not be considered to go beyond the scope of this application.

[0318] The above description is merely a specific implementation of the present application, but is not intended to limit the scope of protection of the present application. Any variations or replacements that can be easily thought of by those skilled in the art within the technical scope disclosed in this application shall fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. 1. A communication method comprising: determining, by a first device, a first frequency unit; communicating with a second device on the first frequency unit, where a granularity of a first channel raster corresponding to the first frequency unit is equal to or smaller than a granularity of a second channel raster corresponding to a second frequency unit, the second frequency unit being used for communication between the first device and a third device, and the first frequency unit and the second frequency domain unit being located in the same operating band; A method comprising:

2. A step of transmitting first configuration information to the second device by the first device, the first configuration information comprising: An uplink offset; a frequency domain spacing between the downlink and uplink frequency locations; Uplink frequency unit and Step 100 indicates at least one of the following: The method of claim 1 further comprising:

3. 3. The method according to claim 1, wherein a frequency position at which a first channel raster in the first frequency unit is arranged corresponds to a frequency position of a resource element in the first frequency unit, and an index of the resource element in the frequency domain is determined based on a transmission bandwidth of the first frequency unit or a transmission bandwidth of the second frequency unit.

4. 4. The method according to claim 1, wherein boundaries of resource blocks in the first frequency unit are aligned with boundaries of resource blocks in the second frequency unit, or boundaries of subcarriers in the first frequency unit are aligned with boundaries of subcarriers in the second frequency unit.

5. When the first frequency unit is included in a transmission bandwidth of the second frequency unit, the boundaries of the resource blocks in the first frequency unit are aligned with the boundaries of the resource blocks in the second frequency unit; When the first frequency unit is included in a guard band of the second frequency unit, the boundaries of the subcarriers in the first frequency unit are aligned with the boundaries of the subcarriers in the second frequency unit; if the first frequency unit is not included in the second frequency unit and a frequency domain interval between the first frequency unit and the second frequency unit is less than a threshold, the boundaries of the subcarriers in the first frequency unit are aligned with the boundaries of the subcarriers in the second frequency unit; 5. A method according to any one of claims 1 to 4.

6. The granularity of the first channel raster is: A deployment mode of the first frequency unit; the subcarrier spacing of the first frequency unit; The method of claim 1 , wherein the at least one of the following is determined:

7. 6. The method of claim 1, wherein in the same operating band, the granularity of the second channel raster is 100 kHz and the granularity of the first channel raster is an integer multiple of 5 kHz, 10 kHz, or 20 kHz.

8. A radio frequency reference frequency F corresponding to the first frequency unit ＲＥＦ But, F ＲＥＦ = F ＲＥＦ－Ｏｆｆｓ +ΔF Ｇｌｏｂａｌ (N ＲＥＦ -N ＲＥＦ－Ｏｆｆｓ ) + offset, F ＲＥＦ－Ｏｆｆｓ is the radio frequency reference frequency offset value, and ΔF Ｇｌｏｂａｌ is the granularity of the global channel raster, and N ＲＥＦ is the new radio absolute frequency channel number NR-ARFCN, and N ＲＥＦ－Ｏｆｆｓ The method of any one of claims 1 to 7, wherein: is an offset value of NR-ARFCN, offset is a 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.

9. The first frequency unit includes an uplink frequency unit used to transmit an uplink signal and / or a downlink frequency unit used to transmit a downlink signal; The step of determining, by the first device, a first frequency unit, further comprising: determining, by the first device, the uplink frequency unit based on an uplink frequency position and an uplink offset; and / or determining, by the first device, the downlink frequency domain unit based on a downlink frequency position and a downlink offset; prior to the step of determining, by the first device, a first frequency unit; determining, by the first device, the uplink offset and / or the downlink offset based on at least one of a type of frequency band in which the downlink frequency unit is located, a first capability in the second device, a type of the second device, a type of time domain resource in which a signal carried by the downlink frequency unit is located, the first capability indicating whether a frequency shift of the uplink signal to an uplink transmission frequency band other than the downlink transmission frequency band in which the downlink frequency unit is located is supported; Including, 9. A method according to any one of claims 1 to 8.

10. the downlink frequency unit is located in the downlink transmission frequency band; If the first capability indicates that the frequency shift of the uplink signal for the uplink transmission frequency band other than the downlink transmission frequency band is supported, the uplink offset is a first value or a second value, or if the first capability indicates that the frequency shift of the uplink signal for the uplink transmission frequency band other than the downlink transmission frequency band is not supported, the uplink offset is a first value, or The downlink frequency unit is arranged in the uplink transmission frequency band, and both the downlink offset and the uplink offset are a first value or a second value; 10. The method of claim 9.

11. The method of claim 10 , wherein the downlink transmission frequency band and the uplink transmission frequency band are located in the same operating band.

12. if the uplink transmission frequency band is used for Long Term Evolution (LTE) uplink communications, the uplink offset is the second value; or The method of claim 10 or 11, wherein if the uplink transmission frequency band is not used for LTE uplink communications, the uplink offset is the first value.

13. When the first frequency unit is located in a TDD operating band, and the downlink signal occupies a downlink time domain resource and the uplink signal occupies an uplink time domain resource, both of the downlink offset and the uplink offset are a first value or a second value; When both the downlink signal and the uplink signal occupy a downlink time domain resource, both the downlink offset and the uplink offset are a first value. When both the downlink signal and the uplink signal occupy an uplink time domain resource, both the downlink offset and the uplink offset are a first value or a second value.

10. The method of claim 9.

14. if the uplink time domain resource is used for LTE uplink communication, the downlink offset and the uplink offset are the second value; or If the uplink time domain resource is not used for LTE uplink communication, the downlink offset and the uplink offset are the first value. The method of claim 13.

15. 15. The method of claim 10, wherein the first value is 0 and the second value is 7.5 kHz.

16. When the second frequency unit is arranged in an uplink transmission frequency band, the uplink frequency units in the first frequency unit are arranged in the transmission bandwidth of the second frequency unit, and the downlink frequency units in the first frequency unit are arranged in the guard band of the second frequency unit; When the second frequency unit is arranged in a downlink transmission frequency band, the downlink frequency unit is arranged in the transmission bandwidth of the second frequency unit, and the uplink frequency unit is arranged in the guard band of the second frequency unit; When the first frequency unit is arranged in a TDD operating band, and the downlink signal transmitted on the downlink frequency unit and the uplink signal transmitted on the uplink frequency unit and corresponding to the downlink signal both occupy the downlink time domain resource, the downlink frequency unit is arranged in the transmission bandwidth of the second frequency unit, and the uplink frequency unit is arranged in the guard band of the second frequency unit; or When the first frequency unit is arranged in a TDD operating band, and both the downlink signal transmitted on the downlink frequency unit and the uplink signal transmitted on the uplink frequency unit and corresponding to the downlink signal occupy the uplink time domain resource, the downlink frequency unit is arranged in the guard band of the second frequency unit, and the uplink frequency unit is arranged in the guard band of the second frequency unit.

16. The method according to any one of claims 1 to 15.

17. A communication device a processing unit configured to determine a first frequency unit; a transceiver unit configured to communicate with a second device over the first frequency band; Equipped with A granularity of a first channel raster corresponding to the first frequency unit is equal to or smaller than a granularity of a second channel raster corresponding to a second frequency unit, the second frequency unit is used for communication between the communication device and a third device, and the first frequency unit and the second frequency domain unit are arranged in the same operating band. Device.

18. The transceiver unit includes: transmitting first configuration information to the second device, the first configuration information comprising: An uplink offset; a frequency domain spacing between the downlink and uplink frequency locations; Uplink frequency unit and At least one of the following: The apparatus of claim 17 , further configured to:

19. 19. The apparatus according to claim 17 or 18, wherein a frequency position at which the first channel raster in the first frequency unit is arranged corresponds to a frequency position of a resource element in the first frequency unit, and an index of the resource element in the frequency domain is determined based on a transmission bandwidth of the first frequency unit or a transmission bandwidth of the second frequency unit.

20. 20. The apparatus of claim 17, wherein resource block boundaries in the first frequency unit are aligned with resource block boundaries in the second frequency unit, or subcarrier boundaries in the first frequency unit are aligned with subcarrier boundaries in the second frequency unit.

21. When the first frequency unit is included in the transmission bandwidth of the second frequency unit, the boundaries of the resource blocks in the first frequency unit are aligned with the boundaries of the resource blocks in the second frequency unit; When the first frequency unit is included in a guard band of the second frequency unit, the boundaries of the subcarriers in the first frequency unit are aligned with the boundaries of the subcarriers in the second frequency unit; if the first frequency unit is not included in the second frequency unit and a frequency domain interval between the first frequency unit and the second frequency unit is less than a threshold, the boundaries of the subcarriers in the first frequency unit are aligned with the boundaries of the subcarriers in the second frequency unit; 21. Apparatus according to any one of claims 17 to 20.

22. The granularity of the first channel raster is: A deployment mode of the first frequency unit; the subcarrier spacing of the first frequency unit; 22. The apparatus of claim 17, wherein the determination is based on at least one of the following:

23. 22. Apparatus according to any one of claims 17 to 21, wherein in the same operating band, the granularity of the second channel raster is 100 kHz and the granularity of the first channel raster is an integer multiple of 5 kHz, 10 kHz or 20 kHz.

24. A radio frequency reference frequency F corresponding to the first frequency unit ＲＥＦ But, F ＲＥＦ = F ＲＥＦ－Ｏｆｆｓ +ΔF Ｇｌｏｂａｌ (N ＲＥＦ -N ＲＥＦ－Ｏｆｆｓ ) + offset, F ＲＥＦ－Ｏｆｆｓ is the radio frequency reference frequency offset value, and ΔF Ｇｌｏｂａｌ is the granularity of the global channel raster, and N ＲＥＦ is the new radio absolute frequency channel number NR-ARFCN, and N ＲＥＦ－Ｏｆｆｓ 24. The apparatus of claim 17, wherein: is an offset value of NR-ARFCN, offset is a 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.

25. The first frequency unit includes an uplink frequency unit used to transmit an uplink signal and / or a downlink frequency unit used to transmit a downlink signal; The first device determining the first frequency unit includes: determining, by the first device, the uplink frequency unit based on an uplink frequency position and an uplink offset; and / or determining, by the first device, the downlink frequency domain unit based on a downlink frequency position and a downlink offset; before the first device determines the first frequency unit; determining, by the first device, the uplink offset and / or the downlink offset based on at least one of a type of frequency band in which the downlink frequency unit is located, a first capability in the second device, a type of the second device, a type of time domain resource in which a signal carried by the downlink frequency unit is located, wherein the first capability indicates whether a frequency shift of the uplink signal to an uplink transmission frequency band other than a downlink transmission frequency band in which the downlink frequency unit is located is supported or not; 25. Apparatus according to any one of claims 17 to 24.

26. the downlink frequency unit is located in the downlink transmission frequency band; if the first capability indicates that the frequency shift of the uplink signal for the uplink transmission frequency band other than the downlink transmission frequency band is supported, the uplink offset is a first value or a second value, or if the first capability indicates that the frequency shift of the uplink signal for the uplink transmission frequency band other than the downlink transmission frequency band is not supported, the uplink offset is a first value; or The downlink frequency unit is located in the uplink transmission frequency band; and both the downlink offset and the uplink offset are a first value or a second value; 26. The apparatus of claim 25.

27. 27. The apparatus of claim 26, wherein the downlink transmission frequency band and the uplink transmission frequency band are located in the same operating band.

28. when the uplink transmission frequency band is used for Long Term Evolution (LTE) uplink communications, the uplink offset is the second value; 28. The apparatus of claim 26 or 27, wherein if the uplink transmission frequency band is not used for LTE uplink communications, the uplink offset is the first value.

29. When the first frequency unit is located in a TDD operating band, and the downlink signal occupies a downlink time domain resource and the uplink signal occupies an uplink time domain resource, both of the downlink offset and the uplink offset are a first value or a second value; When both the downlink signal and the uplink signal occupy a downlink time domain resource, both the downlink offset and the uplink offset are a first value; or When both the downlink signal and the uplink signal occupy an uplink time domain resource, both the downlink offset and the uplink offset are a first value or a second value.

26. The apparatus of claim 25.

30. if the uplink time domain resource is used for LTE uplink communication, the downlink offset and the uplink offset are the second value; or If the uplink time domain resource is not used for LTE uplink communication, the downlink offset and the uplink offset are the first value.

30. The apparatus of claim 29.

31. 31. Apparatus according to any one of claims 26 to 30, wherein the first value is 0 and the second value is 7.5 kHz.

32. When the second frequency unit is arranged in an uplink transmission frequency band, the uplink frequency units in the first frequency unit are arranged in the transmission bandwidth of the second frequency unit, and the downlink frequency units in the first frequency unit are arranged in the guard band of the second frequency unit; When the second frequency unit is arranged in a downlink transmission frequency band, the downlink frequency unit is arranged in the transmission bandwidth of the second frequency unit, and the uplink frequency unit is arranged in the guard band of the second frequency unit; When the first frequency unit is arranged in a TDD operating band, and the downlink signal transmitted on the downlink frequency unit and the uplink signal transmitted on the uplink frequency unit and corresponding to the downlink signal both occupy the downlink time domain resource, the downlink frequency unit is arranged in the transmission bandwidth of the second frequency unit, and the uplink frequency unit is arranged in the guard band of the second frequency unit; or When the first frequency unit is arranged in a TDD operating band, and both the downlink signal transmitted on the downlink frequency unit and the uplink signal transmitted on the uplink frequency unit and corresponding to the downlink signal occupy the uplink time domain resource, the downlink frequency unit is arranged in the guard band of the second frequency unit, and the uplink frequency unit is arranged in the guard band of the second frequency unit.

32. Apparatus according to any one of claims 17 to 31.

33. A communications device comprising a processor and a memory, the memory configured to store a computer program, and the processor configured to call and execute the computer program stored in the memory to perform a method according to any one of claims 1 to 16.

34. A chip comprising a processor configured to retrieve computer instructions from a memory and to execute said computer instructions to cause a device in which said chip is installed to perform a method according to any one of claims 1 to 16.

35. A computer readable storage medium arranged to store computer program instructions, the computer program causing a computer to carry out a method according to any one of claims 1 to 16.

36. A computer program product comprising computer program instructions, the computer program instructions causing a computer to carry out a method according to any one of claims 1 to 16.

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