Communication method and communication apparatus

Abstract

The present application provides a communication method, comprising: a terminal device and a network device can determine channel bandwidths corresponding to transmission bandwidths on the basis of a first correspondence and the transmission bandwidths, and determine guard bands on the basis of the channel bandwidths and a second correspondence, wherein the second correspondence comprises a one-to-one correspondence between a plurality of channel bandwidths and a plurality of guard bands, and the plurality of guard bands respectively corresponding to the plurality of channel bandwidths monotonically non-decrease as the channel bandwidths increase.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 6, 2024, with application number 202410174010.0 and application name “A Communication Method and Communication Device”, the entire contents of which are incorporated by reference into this application. Technical Field

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

[0003] In the new radio (NR) system, two large frequency ranges are specified. One is below 6 GHz (sub 6 GHz) and the other is millimeter wave. The maximum bandwidth and subcarrier spacing corresponding to different frequency ranges will be different. For example, in sub 6 GHz, the maximum bandwidth is 100 megahertz (MHz), and in the millimeter wave range, the maximum bandwidth is 400 MHz. Some subcarrier spacings (such as 15 kilohertz (KHz) or 30 kHz) can only be used in sub 6 GHz, some subcarrier spacings (such as 120 kHz) can only be used in the millimeter wave range, and some subcarrier spacings (such as 60 kHz) can be used in both sub 6 GHz and millimeter wave ranges. Among them, the sub 6 GHz range is called frequency range 1 (FR1).

[0004] FR1 defines a variety of channel bandwidths (CBWs), each of which corresponds to a guard band (GB). Specifically, network devices can configure cell-level channel bandwidths through signaling. After a terminal device accesses the network, the network device configures a bandwidth part (BWP) for the terminal device. The BWP configured by the network device for the terminal device is called the terminal device channel bandwidth. The terminal device channel bandwidth is less than or equal to the cell-level channel bandwidth, but the guard band corresponding to the terminal device channel bandwidth may be larger than the guard band of the cell-level channel bandwidth. As a result, the terminal device channel bandwidth may exceed the cell-level channel bandwidth range, preventing it from accessing the cell.

[0005] Summary of the Invention

[0006] The present application provides a communication method, so that a terminal device can access a cell when the terminal device channel bandwidth is smaller than the cell-level channel bandwidth.

[0007] In a first aspect, a communication method is provided. The method may be executed by a terminal device, or by a chip or circuit, etc., which is not limited in this application.

[0008] The communication method includes: receiving a first message, the first message indicating a first subcarrier spacing and a first transmission bandwidth, the first transmission bandwidth corresponding to the first subcarrier spacing; receiving a second message, the second message indicating the first subcarrier spacing and a second transmission bandwidth, the second transmission bandwidth corresponding to the first subcarrier spacing; determining a first channel bandwidth according to the first transmission bandwidth and a first corresponding relationship, and determining a second channel bandwidth according to the second transmission bandwidth and the first corresponding relationship, the first corresponding relationship including a one-to-one correspondence between any one of M transmission bandwidths and one of the M channel bandwidths, the first transmission bandwidth and the second transmission bandwidth being any two of the M transmission bandwidths, the first channel bandwidth and the second channel bandwidth being two of the M channel bandwidths, and M being an integer greater than or equal to 2; determining a first guard band according to the first channel bandwidth and the second corresponding relationship, and determining a second guard band according to the second channel bandwidth and the second corresponding relationship, the second corresponding relationship including a one-to-one correspondence between any one of the M channel bandwidths and one of the M guard bands, the first guard band and the second guard band being two of the M guard bands, wherein the first channel bandwidth is smaller than the second channel bandwidth, and the first guard band is smaller than or equal to the second guard band.

[0009] Based on the above technical solution, taking the execution subject as the terminal device as an example, after the terminal device receives the first message indicating the first transmission bandwidth and the first subcarrier spacing, and the second message indicating the second transmission bandwidth and the second subcarrier spacing, it can determine the channel bandwidth corresponding to the different transmission bandwidths according to the predefined (e.g., protocol predefined) first correspondence, and determine the protection band corresponding to the different channel bandwidths according to the determined channel bandwidth and the predefined (e.g., protocol predefined) second correspondence. In this technical solution, the first channel bandwidth is smaller than the second channel bandwidth, and under the first carrier spacing, the first protection band corresponding to the first channel bandwidth is less than or equal to the second protection band corresponding to the second channel bandwidth, that is, in the second correspondence indicating the one-to-one correspondence between different channel bandwidths and protection bands, as the channel bandwidth increases, the protection band corresponding to the channel bandwidth satisfies the monotonically non-decreasing rule. This avoids the situation where the terminal device channel bandwidth is smaller than the cell-level channel bandwidth, because the protection band corresponding to the terminal device channel bandwidth is larger than the protection band corresponding to the cell-level channel bandwidth, resulting in the terminal device being unable to access the cell.

[0010] In a second aspect, a communication method is provided. The method can be executed by a network device, or by a chip or circuit, etc., which is not limited in this application.

[0011] The communication method includes: sending a first message, the first message indicating a first subcarrier spacing and a first transmission bandwidth, the first transmission bandwidth corresponding to the first subcarrier spacing; sending a second message, the second message indicating the first subcarrier spacing and a second transmission bandwidth, the second transmission bandwidth corresponding to the first subcarrier spacing; determining a first channel bandwidth according to the first transmission bandwidth and a first corresponding relationship, and determining a second channel bandwidth according to the second transmission bandwidth and the first corresponding relationship, the first corresponding relationship including a one-to-one correspondence between any one of M transmission bandwidths and one of M channel bandwidths, the first transmission bandwidth and the second transmission bandwidth being any two of the M transmission bandwidths, the first channel bandwidth and the second channel bandwidth being two of the M channel bandwidths, and M being an integer greater than or equal to 2; determining a first guard band according to the first channel bandwidth and the second corresponding relationship, and determining a second guard band according to the second channel bandwidth and the second corresponding relationship, the second corresponding relationship including a one-to-one correspondence between any one of the M channel bandwidths and one of the M guard bands, the first guard band and the second guard band being two of the M guard bands, wherein the first channel bandwidth is smaller than the second channel bandwidth, and the first guard band is smaller than or equal to the second guard band.

[0012] Based on the above technical solution, taking the execution subject as a network device as an example, after the network device sends a first message indicating the first transmission bandwidth and the first subcarrier spacing, and a second message indicating the second transmission bandwidth and the second subcarrier spacing to the terminal device, the channel bandwidth corresponding to the different transmission bandwidths can be determined according to a predefined (e.g., protocol predefined) first correspondence, and the protection band corresponding to the different channel bandwidths can be determined according to the determined channel bandwidth and a predefined (e.g., protocol predefined) second correspondence. In this technical solution, in the second correspondence indicating a one-to-one correspondence between different channel bandwidths and protection bands, as the channel bandwidth increases, the protection band corresponding to the channel bandwidth satisfies the monotonically non-decreasing rule. This avoids the situation where the terminal device channel bandwidth is smaller than the cell-level channel bandwidth, because the protection band corresponding to the terminal device channel bandwidth is larger than the protection band corresponding to the cell-level channel bandwidth, resulting in the terminal device being unable to access the cell.

[0013] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the first correspondence includes a one-to-one correspondence between any one of the M transmission bandwidths and one of the M channel bandwidths, including: the first correspondence includes a one-to-one correspondence between any one of the M transmission bandwidths and one of the M channel bandwidths under the first subcarrier spacing.

[0014] Under the first subcarrier spacing, any one of the M transmission bandwidths corresponds to one of the M channel bandwidths in a one-to-one correspondence; that is, under the first subcarrier spacing, any one of the M transmission bandwidths corresponds to one of the M channel bandwidths in a one-to-one correspondence. Because there may be at least one subcarrier spacing, under the same subcarrier spacing, any one of the M transmission bandwidths corresponds to one of the M channel bandwidths in a one-to-one correspondence.

[0015] Based on the above technical solution, the above first correspondence includes a one-to-one correspondence between different transmission bandwidths and different channel bandwidths under different subcarrier spacings, and each transmission bandwidth corresponds to one channel bandwidth.

[0016] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the second correspondence includes a one-to-one correspondence between any one of the M channel bandwidths and one of the M guard bands, including: the second correspondence includes a one-to-one correspondence between any one of the M channel bandwidths and one of the M guard bands under the first subcarrier spacing.

[0017] Based on the above technical solution, the above second correspondence includes a one-to-one correspondence between different channel bandwidths and different guard bands under different subcarrier spacings, and each channel bandwidth corresponds to one guard band.

[0018] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, under the first subcarrier spacing, the largest channel bandwidth among the M channel bandwidths is the third channel bandwidth, the third channel bandwidth corresponds to the third guard band, and the guard bands corresponding to the other channel bandwidths in the M channel bandwidths except the third channel bandwidth are all less than or equal to the third guard band.

[0019] Based on the above technical solution, in the above second correspondence, under the first subcarrier spacing, the maximum channel bandwidth is the third channel bandwidth. It can be understood that the third protection band corresponding to the third channel bandwidth is used as a benchmark. Under the first subcarrier spacing, the protection bands corresponding to other channel bandwidths should be less than or equal to the third protection band, so that the protection bands corresponding to different channel bandwidths increase with the channel bandwidth, and the protection bands corresponding to the channel bandwidth satisfy the monotonically non-decreasing rule.

[0020] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the third channel bandwidth is a maximum channel bandwidth supported by the first frequency range FR1.

[0021] Based on the above technical solution, the second correspondence can be the correspondence between the channel bandwidth and the guard band designed for FR1. Therefore, the third channel bandwidth can be the maximum channel bandwidth supported by FR1. That is, the guard band corresponding to the maximum channel bandwidth supported by FR1 is used as a reference to design the guard bands corresponding to other channel bandwidths.

[0022] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, under the first subcarrier spacing, the smallest channel bandwidth among the M channel bandwidths is the fourth channel bandwidth, the fourth channel bandwidth corresponds to the fourth guard band, and the guard bands corresponding to the other channel bandwidths in the M channel bandwidths except the fourth channel bandwidth are all greater than or equal to the fourth guard band.

[0023] Based on the above technical solution, in the above second correspondence, under the first subcarrier spacing, the minimum channel bandwidth is the fourth channel bandwidth. It can be understood that the fourth protection band corresponding to the fourth channel bandwidth is used as a benchmark. Under the first subcarrier spacing, the protection bands corresponding to other channel bandwidths should be greater than or equal to the fourth protection band, so that the protection bands corresponding to different channel bandwidths increase with the channel bandwidth, and the protection bands corresponding to the channel bandwidth satisfy the monotonically non-decreasing rule.

[0024] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the fourth channel bandwidth is the minimum channel bandwidth supported by the first frequency range FR1.

[0025] Based on the above technical solution, the second correspondence can be the correspondence between the channel bandwidth and the guard band designed for FR1. Therefore, the fourth channel bandwidth can be the minimum channel bandwidth supported by FR1. That is, the guard band corresponding to the minimum channel bandwidth supported by FR1 is used as a reference to design the guard bands corresponding to other channel bandwidths.

[0026] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the largest channel bandwidth among the M channel bandwidths is the third channel bandwidth, the smallest channel bandwidth is the fourth channel bandwidth, the third channel bandwidth corresponds to the third protection band, the fourth channel bandwidth corresponds to the fourth protection band, and the protection bands corresponding to the other channel bandwidths of the multiple channel bandwidths except the third channel bandwidth and the fourth channel bandwidth are all less than or equal to the third protection band, and greater than or equal to the fourth protection band.

[0027] Based on the above technical solution, in the above second correspondence, under the first subcarrier spacing, the maximum channel bandwidth is the third channel bandwidth, and the minimum channel bandwidth is the fourth channel bandwidth. It can be understood that the third protection band corresponding to the third channel bandwidth and the fourth protection band corresponding to the fourth channel bandwidth are used as the benchmark. Under the first subcarrier spacing, the protection bands corresponding to other channel bandwidths should be less than or equal to the third protection band, and greater than or equal to the fourth protection band, so that the protection bands corresponding to different channel bandwidths increase with the channel bandwidth, and the protection bands corresponding to the channel bandwidths satisfy the monotonically non-decreasing rule.

[0028] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, under the first subcarrier spacing, the smallest guard band among the M guard bands is the fifth guard band, and the fifth guard band corresponds to the fifth channel bandwidth. The guard band corresponding to the channel bandwidth whose channel bandwidth among the M channel bandwidths is less than the fifth channel bandwidth is less than or equal to the fifth guard band, and the guard band corresponding to the channel bandwidth whose channel bandwidth among the M channel bandwidths is greater than the fifth channel bandwidth is greater than or equal to the fifth guard band.

[0029] Based on the above technical solution, in the above second correspondence, under the first subcarrier spacing, the smallest guard band is the fifth guard band. It can be understood that the fifth guard band is used as a benchmark, and the guard band corresponding to the channel bandwidth smaller than the fifth channel bandwidth in other channel bandwidths is less than or equal to the fifth guard band, and the guard band corresponding to the channel bandwidth greater than the fifth channel bandwidth is greater than or equal to the fifth guard band, so that the guard bands corresponding to different channel bandwidths increase with the channel bandwidth, and the guard bands corresponding to the channel bandwidth satisfy the monotonically non-decreasing rule.

[0030] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, under the first subcarrier spacing, the largest guard band among the M guard bands is the sixth guard band, and the sixth guard band corresponds to the sixth channel bandwidth. The guard band corresponding to the channel bandwidth whose channel bandwidth among the M channel bandwidths is less than the sixth channel bandwidth is less than or equal to the sixth guard band, and the guard band corresponding to the channel bandwidth whose channel bandwidth among the M channel bandwidths is greater than the sixth channel bandwidth is greater than or equal to the sixth guard band.

[0031] Based on the above technical solution, in the above second correspondence, under the first subcarrier spacing, the largest guard band is the sixth guard band. It can be understood that the sixth guard band is used as a benchmark, and the guard band corresponding to the channel bandwidth smaller than the sixth channel bandwidth in other channel bandwidths is less than or equal to the sixth guard band, and the guard band corresponding to the channel bandwidth greater than the sixth channel bandwidth is greater than or equal to the sixth guard band, so that the guard bands corresponding to different channel bandwidths increase with the channel bandwidth, and the guard bands corresponding to the channel bandwidths satisfy the monotonically non-decreasing rule.

[0032] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the second corresponding relationship includes:

[0033] The first row in the table represents different channel bandwidths, the first column represents different subcarrier spacings, guard band j,i represents the guard band corresponding to the i-th channel bandwidth under the j-th subcarrier spacing, N is a positive integer, i is greater than or equal to 1 and less than or equal to M, j is greater than or equal to 1 and less than or equal to N, the first subcarrier spacing is any one of the N subcarrier spacings, the first channel bandwidth and the second channel bandwidth are any two of the M channel bandwidths, the first guard band is the guard band corresponding to the first channel bandwidth under the first subcarrier spacing, and the second guard band is the guard band corresponding to the second channel bandwidth under the second subcarrier spacing.

[0034] Based on the above technical solution, the second corresponding relationship can be expressed in the form of a table, so that the terminal device and the network device can determine the guard bands corresponding to different channel bandwidths by looking up the table.

[0035] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the first subcarrier spacing is 15 kHz, the first channel bandwidth is 30 MHz, the second channel bandwidth is 40 MHz, and the first guard band and the second guard band are 552.5 KHz; or, the first subcarrier spacing is 15 KHz, the first channel bandwidth is 45 MHz, the second channel bandwidth is 50 MHz, and the first guard band and the second guard band are 692.5 KHz; or, the first subcarrier spacing is 30 KHz, the first channel bandwidth is 90 MHz, the second channel bandwidth is 100 MHz, and the first guard band and the second guard band are 845 KHz.

[0036] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the first channel bandwidth, the first transmission bandwidth, and the first guard band satisfy the following relationship: GB channel1 =(BW Channel1 x 1000(KHz)-N RB1 x SCS x 12) / 2-SCS / 2

[0037] The second channel bandwidth, the second transmission bandwidth and the second guard band satisfy the following relationship: GB channel2 =(BW Channel2 x 1000(KHz)-N RB2 x SCS x 12) / 2-SCS / 2

[0038] Among them, GB channel1 Indicates the first guard band, BW Channel1 represents the first channel bandwidth, N RB1 Indicates the first transmission bandwidth, GB channel2 Indicates the second guard band, BW Channel2 represents the second channel bandwidth, N RB2 represents the second transmission bandwidth, and SCS represents the first subcarrier spacing.

[0039] Based on the above technical solution, the channel bandwidth, guard band, and transmission bandwidth can satisfy the existing formula. That is, by designing the correspondence between the transmission bandwidth and the channel bandwidth, the guard band calculated by the existing formula can still satisfy the rule that as the channel bandwidth increases, the guard band corresponding to the channel bandwidth satisfies the monotonically non-decreasing rule.

[0040] In a third aspect, a communication device is provided. The communication device is configured to execute the first aspect and any one of its embodiments. Specifically, the communication device includes a processor and a memory, the memory being configured to store a computer program; the processor being configured to retrieve and execute the computer program from the memory, causing the communication device to execute the first aspect and any one of its embodiments.

[0041] In one implementation, the communication device is a terminal device, and the transceiver unit may be a transceiver or an input / output interface. The processing unit may be at least one processor. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input / output interface may be an input / output circuit.

[0042] In another implementation, the communication device may be a chip, chip system, or circuit in a terminal device. In this case, the transceiver unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit; and the processing unit may be at least one processor, processing circuit, or logic circuit.

[0043] In a fourth aspect, a communication device is provided. The communication device is configured to execute the second aspect and any one of its embodiments. Specifically, the communication device includes a processor and a memory, the memory being configured to store a computer program; the processor being configured to retrieve and execute the computer program from the memory, causing the network device to execute the second aspect and any one of its embodiments.

[0044] In one implementation, the communication device is a network device, and the transceiver unit may be a transceiver or an input / output interface. The processing unit may be at least one processor. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input / output interface may be an input / output circuit.

[0045] In another implementation, the communication device may be a chip, chip system, or circuit in a network device. In this case, the transceiver unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit; and the processing unit may be at least one processor, processing circuit, or logic circuit.

[0046] In a fifth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed, the method of any one of the implementation modes of the first and second aspects is executed.

[0047] In a sixth aspect, a computer program product comprising instructions is provided, which, when executed, causes the method provided in any one of the implementations of the first and second aspects to be executed.

[0048] In a seventh aspect, a chip is provided, which includes a processor and a communication interface. The processor reads instructions through the communication interface and executes the method provided by any one of the implementation modes of the first and second aspects above.

[0049] Optionally, as an implementation method, the chip also includes a memory, the memory stores a computer program or instructions, and the processor is used to execute the computer program or instructions stored in the memory. When the computer program or instructions are executed, the processor is used to execute the method provided by any one of the implementation methods of the first and second aspects above.

[0050] In an eighth aspect, a communication system is provided, comprising the communication device of the third aspect and the communication device of the fourth aspect.

[0051] In a ninth aspect, a computer program is provided. When the computer program is executed, the method provided in any one of the implementations of the first and second aspects is executed. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] FIG1 is a schematic diagram of a communication system to which the present application is applicable.

[0053] FIG2 is a schematic diagram of channel bandwidth and guard band.

[0054] FIG3 is a schematic diagram of different channel bandwidths.

[0055] FIG4 is a schematic diagram showing different channel bandwidths corresponding to different guard bands.

[0056] FIG5 is a schematic flowchart of a communication method provided in an embodiment of the present application.

[0057] FIG6 is a schematic block diagram of a communication device provided in an embodiment of the present application.

[0058] FIG7 is a schematic diagram of another communication device provided in an embodiment of the present application.

[0059] FIG8 is a schematic diagram of a chip system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0060] In order to facilitate understanding of the embodiments of the present application, the following explanations are made.

[0061] First, in this application, "used to indicate" can include being used for direct indication and being used for indirect indication. When describing that a certain indication information is used to indicate A, it can include that the indication information directly indicates A or indirectly indicates A, but it does not mean that the indication information must include A.

[0062] The information indicated by the indication information is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated. The information to be indicated can be sent as a whole, or divided into multiple sub-information and sent separately, and the sending period and / or sending time of these sub-information can be the same or different. The specific sending method is not limited in this application. Among them, the sending period and / or sending time of these sub-information can be predefined, for example, predefined according to the protocol, or configured by the transmitting device by sending configuration information to the receiving device. Among them, the configuration information can be, but is not limited to, one or a combination of at least two of radio resource control (RRC) signaling, medium access control (MAC) layer signaling and physical layer signaling. Among them, MAC layer signaling, for example, includes MAC control element (CE); physical layer signaling, for example, includes downlink control information (DCI).

[0063] Second, "at least one" shown in the present application refers to one or more, and "a plurality of" refers to two or more. In addition, in the embodiments of the present application, "first", "second" and various digital numbers (for example, "#1", "#2", etc.) are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the sequence number of each process below does not mean the order of execution. The execution order of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application. It should be understood that the objects described in this way can be interchanged where appropriate, so that solutions other than the embodiments of the present application can be described. In addition, in the embodiments of the present application, words such as "S510", "S520" are only for the convenience of description and are not used to limit the order of execution of steps.

[0064] Third, in this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0065] Fourth, the term "storage" used in the embodiments of this application may refer to storage in one or more memories. The one or more memories may be provided separately or integrated into an encoder or decoder, a processor, or a communication device. The one or more memories may also be provided in part separately and in part integrated into a decoder, a processor, or a communication device. The memory may be any type of storage medium, and this application is not limited thereto.

[0066] Fifth, the "protocol" involved in the embodiments of the present application may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems. This application does not limit this.

[0067] Sixth, in the embodiments of the present application, "under the circumstances", "when", and "if" can sometimes be used interchangeably. It should be pointed out that when the distinction between them is not emphasized, the meanings they intend to express are consistent.

[0068] Seventh, in the embodiments of this application, various terms and English abbreviations, such as radio resource control (RRC), are provided for ease of description and should not constitute any limitation on this application. This application does not exclude the possibility of defining other terms in existing or future protocols that can achieve the same or similar functions.

[0069] Eighth, the term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0070] Ninth, in this document, "message", "information", or "information element (IE)" can be used interchangeably. There is no limitation on the name of the message or information, as long as it can achieve the corresponding function.

[0071] The technical solutions in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0072] The technical solutions of the embodiments of the present application can be applied to various communication systems. For example: fifth generation (5G) system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solutions provided in the present application can also be applied to future communication systems, such as the sixth generation mobile communication system. The technical solutions of the embodiments of the present application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and Internet of Things (IoT) communication system or other communication systems.

[0073] To facilitate understanding of the embodiments of the present application, a communication system applicable to the present application is first introduced with reference to FIG1 , for example.

[0074] The mobile communication system includes a core network device 110, an access network device 120 and at least one terminal device (such as the terminal device 130 and the terminal device 140). The terminal device is connected to the access network device, and the access network device is connected to the core network device. The core network device and the access network device can be independent and different physical devices, or the functions of the core network device and the logical functions of the access network device can be integrated into the same physical device, or the functions of part of the core network device and part of the access network device can be integrated into one physical device. The terminal device can be fixed or movable. Figure 1 is only a schematic diagram. The communication system can also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not drawn in Figure 1.

[0075] The embodiments of the present application do not limit the number of core network devices, access network devices, and terminal devices included in the mobile communication system. Alternatively, the mobile communication system includes a core network device, at least two access network devices, and at least one terminal device.

[0076] The terminal equipment in the embodiments of the present application may refer to an access terminal, a user unit, a user station, a mobile station, a mobile station, a relay station, a remote station, a remote terminal, a mobile device, a user terminal, a user equipment (UE), a terminal, a wireless communication device, a user agent, or a user device. The terminal equipment may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network, a terminal device in a future evolved public land mobile network (PLMN), or a terminal device in a future Internet of Vehicles, etc., and the embodiments of the present application are not limited thereto.

[0077] For example, in the embodiments of the present application, wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear. Such as glasses, gloves, watches, clothing and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured devices that can achieve complete or partial functions without relying on smartphones. For example: smart watches or smart glasses. In addition, it can also be a portable device that only focuses on a certain type of application function and needs to be used in conjunction with other devices such as smartphones. Such as various smart bracelets and smart jewelry for vital sign monitoring.

[0078] Furthermore, in the embodiments of the present application, the terminal device may also be a terminal device in an IoT system. IoT is an important component of future information technology development. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network that interconnects humans and machines, and objects and things. In the embodiments of the present application, IoT technology can achieve massive connections, deep coverage, and terminal power saving through, for example, narrowband (NB) technology.

[0079] In addition, in an embodiment of the present application, the terminal device may also include a sensor, whose main functions include collecting data (part of the terminal device), receiving control information and downlink data from the network device, and sending electromagnetic waves to transmit uplink data to the network device.

[0080] The access network device in the embodiment of the present application can be any communication device with wireless transceiver functions for communicating with a terminal device. The device includes but is not limited to: an evolved Node B (eNB), a radio network controller (RNC), a Node B (NB), a home evolved Node B (HeNB, or home Node B, HNB), a baseband unit (BBU), an access point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and reception point (TRP), etc. It can also be a 5G system, such as a gNB in ​​an NR system, or a transmission point (TRP or TP), one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DU), etc.

[0081] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, the radio access network may also be an open radio access network (O-RAN) architecture. In the ORAN system, CU may also be called O-CU (open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0082] The access network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the access network equipment and terminal equipment are located.

[0083] In the embodiment of the present application, the terminal device, access network device or core network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU) and a memory (also called main memory). The operating system can be any one or more computer operating systems that implement business processing through processes, for example, operating system, operating system, operating system, Operating system or Operating system, etc. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software.

[0084] In addition, various aspects or features of the present application can be implemented as methods, apparatuses, or articles of manufacture using standard programming and / or engineering techniques. The term "article of manufacture" as used in this application covers computer programs that can be accessed from any computer-readable device, carrier, or medium. For example, computer-readable media include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes, etc.), optical disks (e.g., compact discs (CDs), digital versatile discs (DVDs), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memories (EPROMs), cards, sticks, or key drives, etc.). In addition, the various storage media described herein may represent one or more devices and / or other machine-readable media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0085] In order to facilitate understanding of the embodiments of the present application, some basic concepts involved in the present application are briefly described.

[0086] 1. Channel bandwidth: FR1 defines a variety of channel bandwidths, including but not limited to 3MHz, 5MHz, 10MHz, 15MHz, 20MHz, 25MHz, 30MHz, 35MHz, 40MHz, 45MHz, 50MHz, 60MHz, 70MHz, 80MHz, 90MHz, and 100MHz.

[0087] Specifically, each channel bandwidth corresponds to a guard band. Exemplarily, the relationship between the channel bandwidth and the guard band is shown in FIG2 .

[0088] As can be seen from Figure 2, the channel bandwidth is greater than the maximum transmission bandwidth. The channel bandwidth includes the maximum transmission bandwidth and the guard band (such as guard band #1 and guard band #2 shown in Figure 2). The actual transmission bandwidth is the active resource block.

[0089] Exemplarily, the guard band satisfies the following formula: GB channel =(BW Channel x 1000 (KHz)-N RB x SCS x 12) / 2-SCS / 2 (1-1)

[0090] Among them, GB in formula (1-1) channel Indicates the protection band corresponding to the channel bandwidth, BW Channel represents the channel bandwidth, N RB It represents the maximum transmission bandwidth corresponding to the channel bandwidth, and SCS is the subcarrier spacing.

[0091] 2. Relationship between guard band and channel bandwidth: The existing protocol (Release 18, R18) defines that, for any subcarrier spacing, the guard band does not monotonically increase with increasing channel bandwidth. In other words, for any subcarrier spacing, as the channel bandwidth increases, the corresponding guard band does not monotonically increase or decrease. Instead, it can both increase and decrease with increasing channel bandwidth.

[0092] Exemplarily, at any subcarrier spacing, the corresponding relationship between the channel bandwidth and the guard band is shown in Table 1 below.

[0093] Table 1 Channel bandwidth and minimum guard band corresponding to channel bandwidth under different subcarrier spacing

[0094] As can be seen from Table 1, when the subcarrier spacing is 15KHz, if the channel bandwidth is 3MHz, the minimum guard band corresponding to the channel bandwidth is 142.5KHz; or, if the channel bandwidth is 5MHz, the minimum guard band corresponding to the channel bandwidth is 242.5KHz; or, if the channel bandwidth is 10MHz, the minimum guard band corresponding to the channel bandwidth is 312.5KHz, and so on. The correspondence between the guard band and the channel bandwidth can be referred to the above Table 1 and will not be repeated here.

[0095] 3. Maximum transmission bandwidth configuration: Under any subcarrier spacing, one channel bandwidth corresponds to one maximum transmission bandwidth. Under any subcarrier spacing, each channel bandwidth has its corresponding maximum transmission bandwidth, so the corresponding channel bandwidth can be determined based on the maximum transmission bandwidth.

[0096] For example, under any subcarrier spacing, the correspondence between the maximum transmission bandwidth and the channel bandwidth is shown in Table 2 below.

[0097] Table 2 Maximum transmission bandwidth configuration N RB

[0098] As can be seen from Table 2, when the subcarrier spacing is 15KHz, if the maximum transmission bandwidth is 15RB, the channel bandwidth is 3MHz; or, if the maximum transmission bandwidth is 25RB, the channel bandwidth is 5MHz; or, if the maximum transmission bandwidth is 52RB, the channel bandwidth is 10MHz, etc. The correspondence between the channel bandwidth and the maximum transmission bandwidth can be referred to in Table 2 above and will not be repeated here.

[0099] The above, in combination with Figure 1, briefly introduces the scenarios in which the communication method provided in the embodiment of the present application can be applied, as well as the basic concepts that may be involved in the embodiment of the present application, and introduces the channel bandwidth in the basic concepts. One way to determine the channel bandwidth is: the network device configures the cell-level channel bandwidth through signaling, the terminal device determines the channel bandwidth based on the maximum transmission bandwidth, and determines the corresponding protection band based on the channel bandwidth.

[0100] Exemplarily, the above method for determining the channel bandwidth includes the following steps:

[0101] Step 1: The network device configures the position, subcarrier spacing, and maximum transmission bandwidth of cell resource block 0 (CRB0) through the downlink frequency information-system information block (FrequencyInfoDL-SIB) in the system information block 1 (SIB1). The position of CRB0 is the position of the carrier frequency. For example, the offsetToPointA field in FrequencyInfoDL-SIB indicates the position of CRB0. In addition, the maximum transmission bandwidth can be determined by selecting a carrier with the largest carrier bandwidth in the scs-SpecificCarrierList in FrequencyInfoDL-SIB.

[0102] Specifically, the signaling format of FrequencyInfoDL-SIB is as follows:

[0103] The signaling format of SCS-SpecificCarrierList is as follows:

[0104] Step 2: The terminal device determines the maximum carrier bandwidth (i.e., the maximum transmission bandwidth) based on the FrequencyInfoDL-SIB field in the received SIB1. The terminal device can then determine the channel bandwidth based on the maximum transmission bandwidth by looking up Table 2 above, and determine the corresponding guard band based on the channel bandwidth by looking up Table 1 above.

[0105] It should be noted that after a terminal device accesses the network, the network device configures the BWP. The terminal device transmits only within the activated BWP, which is less than or equal to the cell-level channel bandwidth. To enable the terminal device to determine which channel bandwidth meets the corresponding RF indicators (e.g., guard band size), the network device can configure a dedicated transmission bandwidth for the terminal device.

[0106] As can be seen from the above, in actual network deployment, the channel bandwidth of the terminal device is smaller than the cell-level channel bandwidth, but there may be a situation where the terminal device cannot successfully access the cell.

[0107] For example, operator A obtains a 40MHz channel bandwidth in frequency band n28, the terminal device's filter design in frequency band n28 is 30MHz, and the terminal device accesses a 40MHz channel bandwidth cell with a 30MHz channel bandwidth.

[0108] As shown in Table 1 above, the guard band corresponding to the 40 MHz channel bandwidth is smaller than the guard band of the 30 MHz channel bandwidth, for example, 552.5 KHz < 592.5 KHz.

[0109] Optionally, the terminal device's CRB0 refers to point A configured in SIB1, and the terminal device determines that the protection band of the 30MHz channel bandwidth exceeds the 40MHz channel bandwidth and cannot access the cell. Alternatively, after the terminal device enters the connected state, the network device configures a dedicated 30MHz channel bandwidth cell for the terminal device, and the protection bandwidth of the 30MHz cell has exceeded the frequency range of the 40MHz cell in SIB1.

[0110] For ease of understanding, FIG3 and FIG4 illustrate that if the guard bands corresponding to different channel bandwidths do not show a monotonically increasing trend as the channel bandwidth increases, the terminal device may be unable to access the cell.

[0111] As shown in Figure 3, frequency band n28 corresponds to a 40MHz channel bandwidth (40MHz between 758MHz and 798MHz as shown in Figure 3), and the channel bandwidth corresponding to the terminal device in frequency band n28 is 30MHz (30MHz between 758MHz and 788MHz as shown in Figure 3). Furthermore, considering that the guard band size corresponding to the 40MHz channel bandwidth is 552.5KHz and the guard band size corresponding to the 30MHz channel bandwidth is 592.5KHz, the starting position of the 30MHz channel bandwidth is 757.96MHz as shown in Figure 4. In this case, the guard band of the 30MHz channel bandwidth corresponding to the terminal device exceeds the operator's legal spectrum, resulting in the terminal device being unable to access the cell.

[0112] In order to solve the above-mentioned problem that the terminal device cannot access the cell, the present application provides a communication method, by setting the protection band size to be monotonically non-decreasing as the channel bandwidth increases, so that the terminal device can access the cell when the channel bandwidth of the terminal device is smaller than the cell-level bandwidth.

[0113] It should be understood that the communication method provided in the embodiments of the present application can be applied to a system that communicates using a multi-antenna technology, for example, the communication system 100 shown in Figure 1. The communication system may include at least one network device and at least one terminal device.

[0114] It should also be understood that the embodiments shown below do not specifically limit the specific structure of the execution subject of the method provided in the embodiments of the present application. As long as it is possible to communicate according to the method provided in the embodiments of the present application by running a program that records the code of the method provided in the embodiments of the present application. For example, the execution subject of the method provided in the embodiments of the present application can be a terminal device, or a functional module in the terminal device that can call and execute the program.

[0115] FIG5 is a schematic flow chart of a communication method provided in an embodiment of the present application, comprising the following steps:

[0116] S510, the network device sends a first message to the terminal device, and correspondingly, the terminal device receives the first message from the network device.

[0117] Specifically, the first message indicates a first subcarrier spacing and a first transmission bandwidth. For example, the first message indicates that the first subcarrier spacing is 15 kHz and the first transmission bandwidth is 160 RB. The first transmission bandwidth in this embodiment is the maximum transmission bandwidth under the first subcarrier spacing.

[0118] Exemplarily, the first message is SIB1#1, the FrequencyInfoDL-SIB in SIB1#1 configures the frequency domain position of the carrier, and the first transmission bandwidth is determined by the carrier with the largest carrier bandwidth in scs-SpecificCarrierLis in FrequencyInfoDL-SIB. In addition, the first subcarrier spacing can be determined by the SubcarrierSpacing field in SIB1#1.

[0119] S520: The network device sends a second message to the terminal device. Correspondingly, the terminal device receives the second message from the network device.

[0120] Specifically, the second message indicates the first subcarrier spacing and the second transmission bandwidth. For example, the second message indicates that the first subcarrier spacing is 15 kHz and the second transmission bandwidth is 216 RB. The second transmission bandwidth in this embodiment is the maximum transmission bandwidth under the first subcarrier spacing.

[0121] Exemplarily, the second message is SIB1#2, the FrequencyInfoDL-SIB in SIB1#2 configures the frequency domain position of the carrier, and the second transmission bandwidth is determined by the carrier with the largest carrier bandwidth in scs-SpecificCarrierLis in FrequencyInfoDL-SIB. In addition, the first subcarrier spacing can be determined by the SubcarrierSpacing field in SIB1#2.

[0122] Furthermore, in this embodiment, after the terminal device receives the first message and the second message, the terminal device and the network device may determine the first channel bandwidth according to the first subcarrier spacing and the first transmission bandwidth indicated by the first message, and determine the second channel bandwidth according to the first subcarrier spacing and the second transmission bandwidth indicated by the second message. The method flow shown in FIG5 further includes:

[0123] S530: The terminal device and the network device determine a first channel bandwidth and a second channel bandwidth.

[0124] Exemplarily, in this embodiment, a first correspondence relationship is satisfied between the channel bandwidth and the transmission bandwidth. The first correspondence relationship includes a one-to-one correspondence relationship between any one of the M transmission bandwidths and one of the M channel bandwidths under any subcarrier spacing, the first transmission bandwidth and the second transmission bandwidth are any two of the M transmission bandwidths, the first channel bandwidth and the second channel bandwidth are two of the M channel bandwidths, and M is an integer greater than or equal to 2. The subcarrier spacing included in the first correspondence relationship includes, but is not limited to, 15 kHz, 30 kHz, and 60 kHz.

[0125] For example, the first correspondence indicates a one-to-one correspondence between two transmission bandwidths (e.g., transmission bandwidth #1 and transmission bandwidth #2) and two channel bandwidths (e.g., channel bandwidth #1 and channel bandwidth #2) under a certain subcarrier spacing. For example, the first correspondence indicates that under subcarrier spacing #1, transmission bandwidth #1 corresponds to channel bandwidth #1, and transmission bandwidth #2 corresponds to channel bandwidth #2.

[0126] In this embodiment, the design of the first correspondence includes but is not limited to the following two methods:

[0127] Method 1: The first correspondence is as shown in Table 2 above. After the terminal device and the network device determine the first transmission bandwidth, they can determine the first channel bandwidth by looking up Table 1. And after the terminal device and the network device determine the second transmission bandwidth, they can determine the second channel bandwidth by looking up Table 1.

[0128] In the case shown in the first embodiment, the first correspondence between the channel bandwidth and the transmission bandwidth may follow the correspondence between the channel bandwidth and the maximum transmission bandwidth specified in the existing protocol, which will not be described in detail here.

[0129] It should be understood that in the case shown in Method 1, the first correspondence relationship is the above-mentioned Table 2 is only an example and does not constitute any limitation on the scope of protection of this application. The first correspondence relationship can also be in other forms. For example, the maximum channel bandwidth in the first correspondence relationship can be greater than 100 MHz, and the minimum channel bandwidth in the first correspondence relationship can be less than 3 MHz. For example, the subcarrier spacing in the first correspondence relationship can be a subcarrier spacing other than the several subcarrier spacings shown in Table 2. Examples will not be given one by one here.

[0130] Method 2: The first correspondence in this embodiment is different from the correspondence in Table 2 shown above. For example, it can be a newly defined Table 3, which indicates the relationship between the channel bandwidth and the transmission bandwidth. In this implementation, the channel bandwidth determined based on the first correspondence, and the guard band determined based on the channel bandwidth and the transmission bandwidth, satisfy the monotonically non-decreasing rule as the channel bandwidth increases.

[0131] For example, as shown in Table 1 above, when the SCS is 15 kHz, the guard band corresponding to the 35 MHz channel bandwidth is smaller than the guard band corresponding to the 30 MHz channel bandwidth. According to the above formula (1-1): GB channel =(BW Channel x 1000(KHz)-N RB x SCS x 12) / 2-SCS / 2

[0132] To ensure that the guard band corresponding to the 35MHz channel bandwidth is not less than the guard band corresponding to the 30MHz channel bandwidth, the maximum transmission bandwidth corresponding to the 35MHz channel bandwidth is set to 187RB (e.g., changed from 188RB as shown in Table 2 to 187RB) when the SCS is 15kHz. The guard band corresponding to the 35MHz channel bandwidth is increased to 662.5kHz. At the same time, under this design, the guard band corresponding to the 40MHz channel bandwidth is 552.5kHz, which is smaller than the 662.5kHz guard band corresponding to the 35MHz channel bandwidth. Therefore, the maximum transmission bandwidth of the 40MHz channel bandwidth is changed to 214RB, and accordingly, the guard band corresponding to the 40MHz channel bandwidth is changed to 732.5kHz. At the same time, under this design, the guard band corresponding to the 45MHz channel bandwidth is 712.5kHz, which is smaller than the 732.5kHz guard band corresponding to the 40MHz channel bandwidth. Therefore, the maximum transmission bandwidth of the 45MHz channel bandwidth is changed to 241RB, and accordingly, the guard band corresponding to the 45MHz channel bandwidth is changed to 802.5kHz. At the same time, under this design, the guard band corresponding to the 50MHz channel bandwidth is 692.5kHz, which is smaller than the 802.5kHz guard band corresponding to the 45MHz channel bandwidth. Therefore, the maximum transmission bandwidth of the 50MHz channel bandwidth is changed to 268RB. Correspondingly, the guard band corresponding to the 50MHz channel bandwidth is changed to 872.5kHz.

[0133] For example, as shown in Table 1 above, when the SCS is 30 kHz, the guard band corresponding to the 15 MHz channel bandwidth is smaller than the guard band corresponding to the 10 MHz channel bandwidth. In order to ensure that the guard band corresponding to the 15 MHz channel bandwidth is not smaller than the guard band corresponding to the 10 MHz channel bandwidth, the maximum transmission bandwidth corresponding to the 15 MHz channel bandwidth is changed from 38 RBs shown in Table 2 to 37 RBs when the SCS is 30 kHz. The guard band corresponding to the 15 MHz channel bandwidth is increased to 825 kHz. At the same time, under this design, the guard band corresponding to the 20 MHz channel bandwidth is 805 kHz, which is smaller than the 825 kHz guard band corresponding to the 15 MHz channel bandwidth. The maximum transmission bandwidth of the 20 MHz channel bandwidth is changed to 50 RBs, and accordingly, the guard band corresponding to the 20 MHz channel bandwidth is changed to 732.5 kHz. At the same time, under this design, the guard band corresponding to the 25 MHz channel bandwidth is 785 kHz, which is smaller than the 985 kHz guard band corresponding to the 20 MHz channel bandwidth. The maximum transmission bandwidth of the 25 MHz channel bandwidth is changed to 63 RBs, and accordingly, the guard band corresponding to the 25 MHz channel bandwidth is changed to 1145 kHz. At the same time, with this design, the guard band corresponding to the 30MHz channel bandwidth is 945kHz, which is smaller than the 1145kHz guard band corresponding to the 25MHz channel bandwidth. Therefore, the maximum transmission bandwidth of the 30MHz channel bandwidth is changed to 76RB, and accordingly, the guard band corresponding to the 30MHz channel bandwidth is changed to 1305kHz. The maximum transmission bandwidth of the 35MHz channel bandwidth is changed to 89RB, and the guard band corresponding to the 35MHz channel bandwidth is changed to 1465kHz. The maximum transmission bandwidth of the 40MHz channel bandwidth is changed to 102RB, and the guard band corresponding to the 40MHz channel bandwidth is changed to 1445kHz. The maximum transmission bandwidth of the 45MHz channel bandwidth is changed to 115RB, and the guard band corresponding to the 45MHz channel bandwidth is changed to 1445kHz. The maximum transmission bandwidth of the 50MHz channel bandwidth is changed to 128RB, and the guard band corresponding to the 50MHz channel bandwidth is changed to 1945kHz. The maximum transmission bandwidth of the 60MHz channel bandwidth is changed to 155RB, and the guard band corresponding to the 60MHz channel bandwidth is changed to 2085kHz. The maximum transmission bandwidth for a 70MHz channel bandwidth is increased to 182 RBs, and the corresponding guard band for a 70MHz channel bandwidth is increased to 2225 kHz. The maximum transmission bandwidth for an 80MHz channel bandwidth is increased to 208 RBs, and the corresponding guard band for an 80MHz channel bandwidth is increased to 2225 kHz. The maximum transmission bandwidth for a 90MHz channel bandwidth is increased to 235 RBs, and the corresponding guard band for a 90MHz channel bandwidth is increased to 2225 kHz. The maximum transmission bandwidth for a 100MHz channel bandwidth is increased to 262 RBs, and the corresponding guard band for a 100MHz channel bandwidth is increased to 2225 kHz.

[0134] For example, as shown in Table 1 above, when the SCS is 60 kHz, the guard band corresponding to the 15 MHz channel bandwidth is smaller than the guard band corresponding to the 10 MHz channel bandwidth. In order to ensure that the guard band corresponding to the 15 MHz channel bandwidth is not smaller than the guard band corresponding to the 10 MHz channel bandwidth. When the SCS is 60 kHz, the maximum transmission bandwidth corresponding to the 15 MHz channel bandwidth is changed from 38 RBs shown in Table 2 to 17 RBs, and the guard band corresponding to the 15 MHz channel bandwidth is increased to 1350 kHz. The maximum transmission bandwidth of the 20 MHz channel bandwidth is changed to 23 RBs, and the guard band corresponding to the 20 MHz channel bandwidth is changed to 1690 kHz. The maximum transmission bandwidth of the 25 MHz channel bandwidth is changed to 29 RBs, and the guard band corresponding to the 25 MHz channel bandwidth is changed to 2000 kHz. The maximum transmission bandwidth of the 30 MHz channel bandwidth is changed to 36 RBs, and the guard band corresponding to the 30 MHz channel bandwidth is changed to 2010 kHz. The maximum transmission bandwidth of the 35 MHz channel bandwidth is changed to 40 RBs, and the guard band corresponding to the 35 MHz channel bandwidth is changed to 2350 kHz. The maximum transmission bandwidth of a 40MHz channel bandwidth is increased to 48 RBs, and the corresponding guard band of a 40MHz channel bandwidth is increased to 2690 kHz. The maximum transmission bandwidth of a 45MHz channel bandwidth is increased to 54 RBs, and the corresponding guard band of a 45MHz channel bandwidth is increased to 2690 kHz. The maximum transmission bandwidth of a 50MHz channel bandwidth is increased to 60 RBs, and the corresponding guard band of a 50MHz channel bandwidth is increased to 3370 kHz. The maximum transmission bandwidth of a 60MHz channel bandwidth is increased to 73 RBs, and the corresponding guard band of a 60MHz channel bandwidth is increased to 3690 kHz. The maximum transmission bandwidth of a 70MHz channel bandwidth is increased to 73 RBs, and the corresponding guard band of a 70MHz channel bandwidth is increased to 4010 kHz. The maximum transmission bandwidth of an 80MHz channel bandwidth is increased to 99 RBs, and the corresponding guard band of an 80MHz channel bandwidth is increased to 4330 kHz. The maximum transmission bandwidth of a 90MHz channel bandwidth is increased to 112 RBs, and the corresponding guard band of a 90MHz channel bandwidth is increased to 4650 kHz. The maximum transmission bandwidth of a 100MHz channel bandwidth is increased to 125 RBs, and the corresponding guard band of a 100MHz channel bandwidth is increased to 4970 kHz.

[0135] In this implementation, Table 2 shown above can be updated as shown in Table 3 below:

[0136] Table 3 Maximum transmission bandwidth configuration N RB

[0137] Table 1 shown above can be updated as shown in Table 4 below:

[0138] Table 4 Channel bandwidth and minimum guard band corresponding to channel bandwidth under different subcarrier spacing SCS

[0139] It should be understood that the above Tables 3 and 4 are only examples and do not constitute any limitation on the scope of protection of this application. Other designs that can satisfy the above-mentioned guard band and satisfy the monotonically non-decreasing rule with the increase of channel bandwidth are also within the scope of protection of this application and will not be repeated here.

[0140] It should also be understood that the above Tables 3 and 4 are based on Table 2 shown above, Table 2 is adjusted to obtain Table 4, and Table 3 is designed according to formula (1-1) so that the guard band in Table 3 satisfies the monotonically non-decreasing rule as the channel bandwidth increases. In this application, Table 4 can also be directly configured instead of being adjusted based on the existing Table 2. That is, this application does not impose any restrictions on how to obtain the first corresponding relationship. It can be determined based on an existing table (such as Table 2) or pre-configured, and no further examples are given.

[0141] It should also be understood that the minimum protection bandwidth corresponding to any channel bandwidth and subcarrier spacing in Table 3 and Table 4 are all possible examples, and one value does not depend on another value. For example, the first correspondence may include only the portion in Table 3, or the first correspondence may also include other values ​​in addition to those shown in Table 3, and the maximum transmission bandwidth corresponding to different channel bandwidths can enable the protection band corresponding to the channel bandwidth to satisfy the rule of monotonically non-decreasing as the channel bandwidth increases. For another example, the second correspondence may include only the portion in Table 4, or the second correspondence may also include other values ​​in addition to those shown in Table 4, as long as the protection band corresponding to the channel bandwidth satisfies the rule of monotonically non-decreasing as the channel bandwidth increases.

[0142] Furthermore, in this embodiment, after the terminal device determines the first channel bandwidth and the second channel bandwidth, the terminal device and the network device may determine a first guard band based on the first channel bandwidth and the second correspondence, and determine a second guard band based on the second channel bandwidth and the second correspondence. The method flow shown in FIG5 further includes:

[0143] S540: The terminal device and the network device determine a first protection band and a second protection band.

[0144] Illustratively, in this embodiment, the channel bandwidth and the guard band satisfy a second correspondence. The second correspondence includes a one-to-one correspondence between any one of the M channel bandwidths and one of the M guard bands under any subcarrier spacing, where the first guard band and the second guard band are two of the M guard bands, and M is an integer greater than or equal to 2.

[0145] For example, the second correspondence indicates a one-to-one correspondence between two channel bandwidths (e.g., channel bandwidth #1 and channel bandwidth #2) and two guard bands (e.g., guard band #1 and guard band #2) under a certain subcarrier spacing. For example, the first correspondence indicates that under subcarrier spacing #1, channel bandwidth #1 corresponds to guard band #1, and channel bandwidth #2 corresponds to guard band #2. The guard band corresponding to a certain channel bandwidth may also be referred to as a minimum guard band, or a minimum guard bandwidth, etc. For example, in this embodiment, the first guard band is the minimum guard band corresponding to the first channel bandwidth under the first subcarrier spacing, and the second guard band is the minimum guard band corresponding to the second channel bandwidth under the first subcarrier spacing.

[0146] Exemplarily, the terminal device stores a second corresponding relationship, which may be in the form of a table or a formula, etc., for representing that a channel bandwidth corresponds to a guard band.

[0147] As an example and not a limitation, the second correspondence relationship may be expressed in a table, as shown in Table 5 below:

[0148] Table 5 Channel bandwidth and minimum guard band corresponding to channel bandwidth under different subcarrier spacing

[0149] The first row in the table represents different channel bandwidths, the first column represents different subcarrier spacings, guard band j,i represents the guard band corresponding to the i-th channel bandwidth under the j-th subcarrier spacing, the first subcarrier spacing is any one of N subcarrier spacings, N is a positive integer, i is greater than or equal to 1 and less than or equal to M, j is greater than or equal to 1 and less than or equal to N, the first channel bandwidth and the second channel bandwidth are any two of the M channel bandwidths, the first guard band is the guard band corresponding to the first channel bandwidth under the first subcarrier spacing, and the second guard band is the guard band corresponding to the second channel bandwidth under the second subcarrier spacing.

[0150] As an example and not a limitation, when the first subcarrier spacing is 15KHz, the first channel bandwidth is 30MHz, and the second channel bandwidth is 40MHz, the first guard band and the second guard band can be set to 552.5KHz. Or,

[0151] When the first subcarrier spacing is 15 kHz, the first channel bandwidth is 45 MHz, and the second channel bandwidth is 50 MHz, the first guard band and the second guard band may be set to 692.5 kHz; or,

[0152] When the first subcarrier spacing is 30 kHz, the first channel bandwidth is 90 MHz, and the second channel bandwidth is 100 MHz, the first guard band and the second guard band can be set to 845 kHz, and so on.

[0153] It should be noted that the above examples are only examples and do not constitute any limitation on the protection scope of this application. In this embodiment, there is no limitation on the value of the first subcarrier spacing, the value of the first channel bandwidth under the first subcarrier spacing, and the value of the second channel bandwidth. It is sufficient that the first protection band is less than or equal to the second protection band.

[0154] In this embodiment, the second correspondence relationship indicates that the first channel bandwidth corresponds to the first guard band, and the second channel bandwidth corresponds to the second guard band, wherein the first channel bandwidth is less than the second channel bandwidth, and the first guard band is less than or equal to the second guard band. Alternatively, the second correspondence relationship indicates that under any SCS, the guard band is monotonically non-decreasing as the channel bandwidth increases. For example, the different channel bandwidths indicated by the second correspondence relationship and their corresponding guard bands satisfy the following relationship: BW Channel1 <BW Channel2 , and GB channel1 ≤GB channel2

[0155] Among them, BW Channel1 and BW Channel2 Indicates the bandwidth of any two channels in the second corresponding relationship under a certain subcarrier spacing, BW Channel1 Indicates channel bandwidth 1, BW Channel2 Indicates channel bandwidth 2, GB channel1 Indicates the guard band 1 corresponding to the channel bandwidth 1, GB channel2 Indicates guard band 2 corresponding to channel bandwidth 2. Channel bandwidth 2 is greater than channel bandwidth 1, and guard band 1 is less than or equal to guard band 2.

[0156] As can be seen from the above, in this embodiment, the guard band corresponding to the small channel bandwidth is not larger than the guard band corresponding to the large channel bandwidth.

[0157] As shown in step S530 above, the corresponding relationship between the channel bandwidth and the guard band can be directly designed so that the guard band satisfies the monotonically non-decreasing rule as the channel bandwidth increases. Alternatively, the corresponding relationship between the channel bandwidth and the transmission bandwidth can be designed so that the guard band calculated using formula (1-1) satisfies the monotonically non-decreasing rule as the channel bandwidth increases.

[0158] For ease of understanding, the following two designs are described separately:

[0159] Method 3: Corresponding to Method 1 in step S520 above, the correspondence between the channel bandwidth and the transmission bandwidth follows the correspondence specified in the existing protocol, and the correspondence between the channel bandwidth and the guard band is designed so that the guard band satisfies the monotonically non-decreasing rule with the increase of the channel bandwidth.

[0160] For example, the method for designing the correspondence between the channel bandwidth and the guard band shown in the third method includes but is not limited to the following possible implementation methods:

[0161] As a possible implementation method, in this embodiment, when designing the correspondence between the channel bandwidth and the guard band, at any subcarrier spacing, the guard band corresponding to the maximum channel bandwidth is used as a reference, and the guard bands corresponding to other channel bandwidths are less than or equal to the guard band corresponding to the maximum channel bandwidth, so that the guard band satisfies the monotonically non-decreasing condition as the channel bandwidth increases.

[0162] For example, under the first subcarrier spacing, the largest channel bandwidth among the M channel bandwidths is the third channel bandwidth, the third channel bandwidth corresponds to the third guard band, and the guard bands corresponding to the other channel bandwidths among the M channel bandwidths except the third channel bandwidth are all less than or equal to the third guard band.

[0163] Optionally, the third channel bandwidth is the maximum channel bandwidth supported by FR1, or the third channel bandwidth is the maximum channel bandwidth in Table 1, for example, the third channel bandwidth is 100 MHz.

[0164] For example, the guard band corresponding to 100MHz (e.g., when the subcarrier spacing is 30KHz, the guard band is 845Hz, and when the subcarrier spacing is 60KHz, the guard band is 1370Hz) is used as the maximum value, and the guard bands of the remaining channel bandwidths are guaranteed to be monotonically non-decreasing. This includes but is not limited to:

[0165] When the subcarrier spacing is 30 kHz, the guard band corresponding to the 90 MHz channel bandwidth is no greater than 845 kHz; when the subcarrier spacing is 30 kHz, the guard band corresponding to the 80 MHz channel bandwidth is no greater than 845 kHz; with a 15 kHz SCS, the guard band corresponding to the 30 MHz channel bandwidth is no greater than 552.5 kHz, and so on.

[0166] As an example and not a limitation, when the first subcarrier spacing is 15KHz, the first channel bandwidth is 30MHz, and the second channel bandwidth is 40MHz, the first guard band can be set to 552.5KHz and the second guard band can be set to 552.5KHz. Or

[0167] When the first subcarrier spacing is 15KHz, the first channel bandwidth is 45MHz, and the second channel bandwidth is 50MHz, the first guard band can be set to 692.5KHz and the second guard band can be set to 692.5KHz. Or

[0168] When the first subcarrier spacing is 30 kHz, the first channel bandwidth is 90 MHz, and the second channel bandwidth is 100 MHz, the first guard band can be set to 845 kHz, the second guard band can be set to 845 kHz, and so on.

[0169] Optionally, in this implementation, the second correspondence relationship may be as shown in the following Table 6:

[0170] Table 6 Channel bandwidth and minimum guard band corresponding to channel bandwidth under different subcarrier spacing SCS

[0171] It should be understood that Table 6 is only an example and does not limit the scope of protection of this application. Other designs that can make the guard band meet the monotonically non-decreasing rule with the increase of channel bandwidth are also within the scope of protection of this application and are not further described here.

[0172] It should also be understood that the minimum guard bandwidths corresponding to any channel bandwidth and subcarrier spacing in Table 6 are all possible examples, and there is no interdependence between different values. For example, the second correspondence may include only the portion in Table 6, or the second correspondence may also include other values ​​in addition to those shown in Table 7, as long as the above-mentioned rule that the guard band corresponding to the channel bandwidth satisfies a monotonically non-decreasing rule as the channel bandwidth increases is satisfied.

[0173] It should be noted that in this implementation, the maximum bandwidth can also be a channel bandwidth greater than 100 MHz in FR1 that is standardized during subsequent evolution, including 200 MHz, 250 MHz, 300 MHz, 400 MHz, 500 MHz, or 1 GHz. In other words, the guard band can also be based on the guard band corresponding to a channel bandwidth greater than 100 MHz, ensuring that the guard band is monotonically non-decreasing with increasing channel bandwidth.

[0174] In addition, in this implementation, the protection band serving as a benchmark can be determined by the above-mentioned formula (1-1), while the protection bands corresponding to other channel bandwidths may not satisfy the above-mentioned formula (1-1). For example, the protection band of the maximum channel bandwidth (100 MHz) is determined by the calculation formula (1-1), and the protection bands of other channel bandwidths are designed to satisfy the monotonically non-decreasing rule with the increase of the channel bandwidth, and do not need to be strictly determined according to the calculation formula (1-1).

[0175] As another possible implementation method, in this embodiment, when designing the correspondence between the channel bandwidth and the guard band, at any subcarrier spacing, the guard band corresponding to the minimum channel bandwidth is used as a reference, and the guard bands corresponding to other channel bandwidths are greater than or equal to the guard band corresponding to the minimum channel bandwidth, so that the guard band satisfies the monotonically non-decreasing condition with the increase of the channel bandwidth.

[0176] For example, under the first subcarrier spacing, the smallest channel bandwidth among the M channel bandwidths is the fourth channel bandwidth, the fourth channel bandwidth corresponds to the fourth protection band, and the protection bands corresponding to the other channel bandwidths among the M channel bandwidths except the fourth channel bandwidth are all greater than or equal to the fourth protection band.

[0177] Optionally, the fourth channel bandwidth is the minimum channel bandwidth supported by the first frequency range FR1; or, the fourth channel bandwidth is the minimum channel bandwidth in Table 1, for example, the fourth channel bandwidth is 3 MHz.

[0178] For example, the guard band corresponding to 3 MHz (eg, when the subcarrier spacing is 15 kHz, the guard band is 142.5 Hz) is taken as the minimum value, and the guard bands of the remaining channel bandwidths are guaranteed to be monotonically non-decreasing.

[0179] For another example, taking the guard band corresponding to 10 MHz (15 kHz SCS-312.5 Hz, 30 kHz SCS-382 Hz, 60 kHz SCS-1310 Hz) as a benchmark, the guard bands of the remaining channel bandwidths greater than 10 MHz are guaranteed to be monotonically non-decreasing.

[0180] As an example and not a limitation, when the first subcarrier spacing is 30 kHz, the first channel bandwidth is 90 MHz, and the second channel bandwidth is 100 MHz, the first guard band and the second guard band can be set to be no less than 665 kHz, and the first guard band is less than or equal to the second guard band; or,

[0181] When the first subcarrier spacing is 30 kHz, the first channel bandwidth is 15 MHz, and the second channel bandwidth is 20 MHz, the first guard band and the second guard band may be set to be no less than 665 kHz, and the first guard band is less than or equal to the second guard band; or

[0182] When the first subcarrier spacing is 15KHz, the first channel bandwidth is 15MHz, and the second channel bandwidth is 20MHz, the first guard band and the second guard band can be set to no less than 312.5kHz, and the first guard band is less than or equal to the second guard band, and so on.

[0183] Optionally, in this implementation, the second correspondence relationship may be as shown in Table 7 below:

[0184] Table 7 Channel bandwidth and minimum guard band corresponding to channel bandwidth under different subcarrier spacing

[0185] It should be understood that Table 7 is only an example and does not limit the scope of protection of this application. Other designs that can make the guard band meet the monotonically non-decreasing rule with the increase of channel bandwidth are also within the scope of protection of this application and are not further described here.

[0186] It should also be understood that the minimum guard bandwidths corresponding to any channel bandwidth and subcarrier spacing in Table 7 are all possible examples, and there is no interdependence between different values. For example, the second correspondence may include only the portion in Table 7, or the second correspondence may also include other values ​​in addition to those shown in Table 7, as long as the above-mentioned rule that the guard band corresponding to the channel bandwidth satisfies a monotonically non-decreasing rule as the channel bandwidth increases is satisfied.

[0187] It should be noted that in this implementation, the minimum bandwidth can also be a channel bandwidth less than 10 MHz in FR1 that is standardized during subsequent evolution, including 3 MHz, 5 MHz, 1 MHz, etc. In other words, the guard band can also be based on the guard band corresponding to a channel bandwidth less than 10 MHz, ensuring that the guard band is monotonically non-decreasing with increasing channel bandwidth.

[0188] In addition, in this implementation, the guard band serving as a benchmark can be determined by the above-mentioned formula (1-1), while the guard bands corresponding to other channel bandwidths may not satisfy the above-mentioned formula (1-1). For example, the guard band of the minimum channel bandwidth (10 MHz) is determined by the calculation formula (1-1), and the guard bands of other channel bandwidths are designed to satisfy the monotonically non-decreasing rule with the increase of the channel bandwidth, and do not need to be strictly determined according to the calculation formula (1-1).

[0189] As another possible implementation, the second correspondence is determined based on the guard band corresponding to channel bandwidth #A as a reference, where the guard band corresponding to a channel bandwidth smaller than channel bandwidth #A satisfies a monotonically non-decreasing rule as the channel bandwidth increases. For example, the guard band #A corresponding to channel bandwidth #A (e.g., 5 MHz or 10 MHz) can be used as a reference, and the guard band corresponding to a channel bandwidth larger than channel bandwidth #A is greater than or equal to guard band #A.

[0190] As shown in Table 1 above, when the channel bandwidth is greater than 10 MHz, the guard band size may be non-monotonic. Using the guard band corresponding to a 10 MHz channel bandwidth as a benchmark, the remaining channel bandwidths are guaranteed to be monotonically non-decreasing.

[0191] For example, the guard band corresponding to 10MHz (e.g., when the subcarrier spacing is 15KHz, the guard band is 312.5Hz, when the subcarrier spacing is 30KHz, the guard band is 665Hz, and when the subcarrier spacing is 60KHz, the guard band is 1010Hz) is used as the minimum value, and the guard band corresponding to 100MHz (e.g., when the subcarrier spacing is 30KHz, the guard band is 845Hz, and when the subcarrier spacing is 60KHz, the guard band is 1370Hz) is used as the maximum value. The guard bands of the remaining channel bandwidths are guaranteed to be monotonically non-decreasing. This includes but is not limited to:

[0192] When the subcarrier spacing is 15 kHz, the guard band corresponding to the 30 MHz channel bandwidth is not less than 312.5 Hz; or

[0193] When the subcarrier spacing is 30 kHz, the guard band corresponding to the 90 MHz channel bandwidth is not less than 665 Hz; or

[0194] When the subcarrier spacing is 60KHz, the guard band corresponding to the 15MHz channel bandwidth is not less than 1010Hz, and so on.

[0195] Optionally, in this implementation, Table 1 above can be updated as shown in Table 7 above, which is different from the above-mentioned guard band corresponding to the fourth channel bandwidth in that: channel bandwidth #A is not the minimum channel bandwidth, but the minimum channel bandwidth in Table 1 that does not satisfy the monotonically non-decreasing rule that the guard band increases with the channel bandwidth.

[0196] As another possible implementation method, in this embodiment, when designing the correspondence between the channel bandwidth and the guard band, at any subcarrier spacing, the guard band corresponding to the minimum channel bandwidth and the guard band corresponding to the maximum channel bandwidth are used as the benchmark, and the guard bands corresponding to other channel bandwidths are greater than or equal to the guard band corresponding to the minimum channel bandwidth, and less than or equal to the guard band corresponding to the maximum channel bandwidth, so that the guard band satisfies the monotonically non-decreasing condition with the increase of the channel bandwidth.

[0197] For example, under the first subcarrier spacing, the largest channel bandwidth among the M channel bandwidths is the third channel bandwidth, and the smallest channel bandwidth is the fourth channel bandwidth. The third channel bandwidth corresponds to the third guard band, and the fourth channel bandwidth corresponds to the fourth guard band. The guard bands corresponding to the other channel bandwidths of the multiple channel bandwidths except the third channel bandwidth and the fourth channel bandwidth are all less than or equal to the third guard band, and greater than or equal to the fourth guard band.

[0198] Optionally, the fourth channel bandwidth is the minimum channel bandwidth supported by the first frequency range FR1; or, the fourth channel bandwidth is the minimum channel bandwidth in Table 1, for example, the fourth channel bandwidth is 3 MHz.

[0199] Optionally, the third channel bandwidth is the maximum channel bandwidth supported by FR1, or the third channel bandwidth is the maximum channel bandwidth in Table 1, for example, the third channel bandwidth is 100 MHz.

[0200] As shown in Table 1 above, when the channel bandwidth is greater than 10 MHz, the guard band size may be non-monotonic. Taking the guard bands corresponding to 10 MHz and 100 MHz channel bandwidths as the benchmark, the channel bandwidths of other bandwidths are monotonically non-decreasing.

[0201] For example, the guard band corresponding to 10MHz (e.g., when the subcarrier spacing is 15KHz, the guard band is 312.5Hz, when the subcarrier spacing is 30KHz, the guard band is 665Hz, and when the subcarrier spacing is 60KHz, the guard band is 1010Hz) is used as the minimum value, and the guard band corresponding to 100MHz (e.g., when the subcarrier spacing is 30KHz, the guard band is 845Hz, and when the subcarrier spacing is 60KHz, the guard band is 1370Hz) is used as the maximum value. The guard bands of the remaining channel bandwidths are guaranteed to be monotonically non-decreasing. This includes but is not limited to:

[0202] When the subcarrier spacing is 30 kHz, the guard band corresponding to the 90 MHz channel bandwidth shall not exceed 845 kHz and shall not be less than 665 Hz; when the subcarrier spacing is 60 kHz, the guard band corresponding to the 15 MHz channel bandwidth shall not exceed 1370 kHz and shall not be less than 1010 Hz.

[0203] As an example and not a limitation, when the first subcarrier spacing is 30 kHz, the first channel bandwidth is 90 MHz, and the second channel bandwidth is 100 MHz, the first guard band and the second guard band can be set to no more than 845 kHz and no less than 665 kHz, and the first guard band is less than or equal to the second guard band; or,

[0204] When the first subcarrier spacing is 30 kHz, the first channel bandwidth is 15 MHz, and the second channel bandwidth is 20 MHz, the first guard band and the second guard band may be set to be no greater than 845 kHz and no less than 665 kHz, and the first guard band is less than or equal to the second guard band; or

[0205] When the first subcarrier spacing is 15KHz, the first channel bandwidth is 15MHz, and the second channel bandwidth is 20MHz, the first guard band and the second guard band can be set to no more than 1370KHz and no less than 1010Hz, and the first guard band is less than or equal to the second guard band, and so on.

[0206] Optionally, in this implementation, the second correspondence may be as shown in Table 8 below:

[0207] Table 8 Channel bandwidth and minimum guard band corresponding to channel bandwidth under different subcarrier spacing

[0208] It should be understood that Table 8 is only an example and does not limit the scope of protection of this application. Other designs that can make the guard band meet the monotonically non-decreasing rule with the increase of channel bandwidth are also within the scope of protection of this application and are not further described here.

[0209] It should also be understood that the minimum guard bandwidths corresponding to any channel bandwidth and subcarrier spacing in Table 8 are all possible examples, and there is no interdependence between different values. For example, the second correspondence may include only the portion in Table 8, or the second correspondence may also include other values ​​in addition to those shown in Table 8, as long as the above-mentioned rule that the guard band corresponding to the channel bandwidth satisfies a monotonically non-decreasing rule as the channel bandwidth increases is satisfied.

[0210] As another possible implementation, in this embodiment, when designing the correspondence between channel bandwidth and guard band, at any subcarrier spacing, the minimum guard band defined in the current protocol is used as a reference, and the channel bandwidth corresponding to this minimum guard band is channel bandwidth #1. The guard bands corresponding to other channel bandwidths greater than channel bandwidth #1 are greater than or equal to the minimum guard band, and the guard bands corresponding to channel bandwidths less than channel bandwidth #1 are less than or equal to the minimum guard band, such that the guard bands satisfy a monotonically non-decreasing characteristic with increasing channel bandwidth.

[0211] For example, at the first subcarrier spacing, the smallest guard band among the M guard bands is the fifth guard band, the fifth guard band corresponds to the fifth channel bandwidth, the guard band corresponding to the channel bandwidth whose channel bandwidth among the M channel bandwidths is less than the fifth channel bandwidth is less than or equal to the fifth guard band, and the guard band corresponding to the channel bandwidth whose channel bandwidth among the M channel bandwidths is greater than the fifth channel bandwidth is greater than or equal to the fifth guard band.

[0212] For example, in Table 1, when the subcarrier spacing is 15 kHz, the guard band of 142.5 kHz corresponding to the 3 MHz channel bandwidth is the smallest guard band. Therefore, when the subcarrier spacing is 15 kHz, the guard band corresponding to a channel bandwidth greater than 3 MHz is not less than 142.5 kHz, and the guard band corresponding to a channel bandwidth less than 3 MHz is not greater than 142.5 kHz. Similarly, when the subcarrier spacing is 30 kHz, the guard band of 505 kHz corresponding to the 5 MHz channel bandwidth is the smallest guard band. Therefore, when the subcarrier spacing is 30 kHz, the guard band corresponding to the 4 MHz channel bandwidth is not less than 505 kHz, and the guard band corresponding to the channel bandwidth less than 4 MHz is not greater than 505 kHz. When the subcarrier spacing is 60 kHz, the guard band of 990 kHz corresponding to the 15 MHz channel bandwidth is the smallest guard band. Therefore, when the subcarrier spacing is 60 kHz, the guard band corresponding to the 15 MHz channel bandwidth is not less than 990 kHz, and the guard band corresponding to the channel bandwidth less than 15 MHz is not greater than 990 kHz.

[0213] As an example and not a limitation, when the first subcarrier spacing is 30 kHz, the first channel bandwidth is 90 MHz, and the second channel bandwidth is 100 MHz, the first guard band and the second guard band can be set to be no less than 505 kHz, and the first guard band is less than or equal to the second guard band; or,

[0214] When the first subcarrier spacing is 30 kHz, the first channel bandwidth is 15 MHz, and the second channel bandwidth is 20 MHz, the first guard band and the second guard band may be set to be no less than 505 kHz, and the first guard band is less than or equal to the second guard band; or

[0215] When the first subcarrier spacing is 15KHz, the first channel bandwidth is 15MHz, and the second channel bandwidth is 20MHz, the first guard band and the second guard band can be set to no less than 142.5KHz, and the first guard band is less than or equal to the second guard band, and so on.

[0216] Optionally, in this implementation, the second correspondence relationship may be as shown in the following Table 9:

[0217] Table 9 Channel bandwidth and minimum guard band corresponding to channel bandwidth under different subcarrier spacing

[0218] It should be understood that Table 9 is only an example and does not limit the scope of protection of this application. Other designs that can make the guard band meet the monotonically non-decreasing rule with the increase of channel bandwidth are also within the scope of protection of this application and are not further described here.

[0219] It should also be understood that the minimum guard bandwidths corresponding to any channel bandwidth and subcarrier spacing in Table 9 are all possible examples, and there is no interdependence between different values. For example, the second correspondence may include only the portion in Table 8, or the second correspondence may also include other values ​​in addition to those shown in Table 9, as long as the above-mentioned rule that the guard band corresponding to the channel bandwidth satisfies a monotonically non-decreasing rule as the channel bandwidth increases is satisfied.

[0220] As another possible implementation, in this embodiment, when designing the correspondence between channel bandwidth and guard band, at any subcarrier spacing, the minimum guard band defined in the current protocol is used as a reference, and the channel bandwidth corresponding to this minimum guard band is channel bandwidth #1. The guard bands corresponding to other channel bandwidths greater than channel bandwidth #1 are greater than or equal to the minimum guard band, and the guard bands corresponding to channel bandwidths less than channel bandwidth #1 are less than or equal to the minimum guard band, such that the guard bands satisfy a monotonically non-decreasing characteristic with increasing channel bandwidth.

[0221] For example, under the first subcarrier spacing, the largest guard band among the M guard bands is the sixth guard band, the sixth guard band corresponds to the sixth channel bandwidth, the guard band corresponding to the channel bandwidth of the M channel bandwidths that is less than the sixth channel bandwidth is less than or equal to the sixth guard band, and the guard band corresponding to the channel bandwidth of the M channel bandwidths that is greater than the sixth channel bandwidth is greater than or equal to the sixth guard band.

[0222] For example, when the subcarrier spacing in Table 1 is 15KHz, the guard band of 712.5KHz corresponding to the 45MHz channel bandwidth is the largest guard band. Therefore, when the subcarrier spacing is 15KHz, the guard band corresponding to the channel bandwidth greater than 45MHz is not less than 712.5KHz, and the guard band corresponding to the channel bandwidth less than 45MHz is not greater than 712.5KHz. Similarly, when the subcarrier spacing is 30KHz, the guard band of 1065KHz corresponding to the 45MHz channel bandwidth is the largest guard band. Therefore, when the subcarrier spacing is 30KHz, the guard band corresponding to the channel bandwidth greater than 45MHz is not less than 1065KHz, and the guard band corresponding to the channel bandwidth less than 45MHz is not greater than 1065KHz. Similarly, when the subcarrier spacing is 60 kHz, the guard band of 1630 kHz corresponding to the 35 MHz channel bandwidth is the largest guard band. Therefore, when the subcarrier spacing is 60 kHz, the guard band corresponding to the channel bandwidth greater than 35 MHz is not less than 1630 kHz, and the guard band corresponding to the channel bandwidth less than 35 MHz is not greater than 1630 kHz.

[0223] As an example and not a limitation, when the first subcarrier spacing is 30 kHz, the first channel bandwidth is 90 MHz, and the second channel bandwidth is 100 MHz, the first guard band and the second guard band can be set to no more than 1065 kHz, and the first guard band is less than or equal to the second guard band; or,

[0224] When the first subcarrier spacing is 30 kHz, the first channel bandwidth is 15 MHz, and the second channel bandwidth is 20 MHz, the first guard band and the second guard band may be set to be no greater than 1065 kHz, and the first guard band is less than or equal to the second guard band; or

[0225] When the first subcarrier spacing is 15KHz, the first channel bandwidth is 15MHz, and the second channel bandwidth is 20MHz, the first guard band and the second guard band can be set to no more than 712.5KHz, and the first guard band is less than or equal to the second guard band, and so on.

[0226] Optionally, in this implementation, the second correspondence may be as shown in Table 10 below:

[0227] Table 10 Channel bandwidth and minimum guard band corresponding to channel bandwidth under different subcarrier spacing

[0228] It should be understood that Table 10 is merely an example and does not limit the scope of protection of this application. Other designs that can ensure that the guard band meets the monotonically non-decreasing rule with increasing channel bandwidth are also within the scope of protection of this application and will not be described in detail here.

[0229] It should also be understood that the minimum guard bandwidths corresponding to any channel bandwidth and subcarrier spacing in Table 10 are all possible examples, and there is no interdependence between different values. For example, the second correspondence may include only the portion in Table 10, or the second correspondence may also include other values ​​in addition to those shown in Table 10, as long as the above-mentioned rule that the guard band corresponding to the channel bandwidth satisfies a monotonically non-decreasing rule as the channel bandwidth increases is satisfied.

[0230] Method 4: Corresponding to Method 2 in step S530 above, the correspondence between the channel bandwidth and the maximum transmission bandwidth is a newly defined correspondence, and the correspondence between the channel bandwidth and the maximum transmission bandwidth is changed so that the guard band satisfies the monotonically non-decreasing rule with increasing channel bandwidth.

[0231] For example, in the case shown in the fourth mode, after the channel bandwidth is determined according to the first corresponding relationship, the guard band corresponding to the channel bandwidth can be determined based on the channel bandwidth and the maximum transmission bandwidth. Specifically, the guard band satisfies the following formula: GB channel =(BW Channel x 1000 (KHz)-N RB x SCS x 12) / 2-SCS / 2 (1-1)

[0232] For example, the first channel bandwidth, the first transmission bandwidth, and the first guard band satisfy the following relationship: GB channel1 =(BW Channel1 x 1000(KHz)-N RB1 x SCS x 12) / 2-SCS / 2

[0233] The second channel bandwidth, the second transmission bandwidth and the second guard band satisfy the following relationship: GB channel2 =(BW Channel2 x 1000(KHz)-N RB2 x SCS x 12) / 2-SCS / 2

[0234] Among them, GB channel1 Indicates the first guard band, BW Channel1 represents the first channel bandwidth, N RB1Indicates the first transmission bandwidth, GB channel2 Indicates the second guard band, BW Channel2 represents the second channel bandwidth, N RB2 represents the second transmission bandwidth, and SCS represents the first subcarrier spacing.

[0235] In other words, in the case shown in mode 4, the correspondence between the channel bandwidth and the guard band is as shown in Table 4 above. After the channel bandwidth is determined, the guard band can be determined based on Table 4 and the channel bandwidth.

[0236] In this embodiment, after a terminal device accesses the network, the network configures a BWP, and the terminal device transmits and receives only within the activated BWP. The BWP is less than or equal to the cell-level bandwidth. Because the guard band decreases monotonically with increasing channel bandwidth, a smaller bandwidth can consistently meet the RF requirements of a larger bandwidth, eliminating the need for the network to configure a dedicated bandwidth for the UE.

[0237] In the communication method shown in Figure 5, after the terminal device receives a first message indicating a first transmission bandwidth and a first subcarrier spacing, and a second message indicating a second transmission bandwidth and a second subcarrier spacing, it can determine the channel bandwidth corresponding to different transmission bandwidths according to a predefined (e.g., protocol predefined) first correspondence, and determine the protection band corresponding to different channel bandwidths according to the determined channel bandwidth and a predefined (e.g., protocol predefined) second correspondence. In this technical solution, in the second correspondence indicating a one-to-one correspondence between different channel bandwidths and protection bands, as the channel bandwidth increases, the protection band corresponding to the channel bandwidth satisfies a monotonically non-decreasing rule (e.g., the first channel bandwidth is less than the second channel bandwidth, and at the first carrier spacing, the first protection band corresponding to the first channel bandwidth is less than or equal to the second protection band corresponding to the first channel bandwidth). This avoids the situation where, when the terminal device channel bandwidth is smaller than the cell-level channel bandwidth, the terminal device is unable to access the cell because the protection band corresponding to the terminal device channel bandwidth is greater than the protection band corresponding to the cell-level channel bandwidth.

[0238] It should be understood that the size of the serial numbers of the above processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0239] It should also be understood that in the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0240] It should also be understood that in some of the above embodiments, the devices in the existing network architecture are mainly used as examples for illustrative description (such as network devices, terminal devices, etc.), and it should be understood that the embodiments of the present application are not limited to the specific form of the devices. For example, devices that can achieve the same functions in the future are applicable to the embodiments of the present application.

[0241] It is understandable that in the above-mentioned various method embodiments, the methods and operations implemented by devices (such as network devices, terminal devices) can also be implemented by components of the devices (such as chips or circuits).

[0242] The communication method provided in the embodiments of the present application is described in detail above in conjunction with FIG5 . The communication method is primarily described from the perspective of interaction between a terminal device and a network device. It is understood that, in order to implement the above functions, the terminal device and the network device include hardware structures and / or software modules corresponding to the respective functions.

[0243] Those skilled in the art should be aware that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0244] The communication device provided in this application is described in detail below in conjunction with Figures 6 to 8. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment. Therefore, for matters not described in detail, please refer to the method embodiment above. For the sake of brevity, some contents will not be repeated.

[0245] In the embodiment of the present application, the functional modules of the transmitting device or the receiving device can be divided according to the above method example. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation. The following is an example of dividing each functional module according to each function.

[0246] Figure 6 is a schematic block diagram of a communication device 10 provided in an embodiment of the present application. The device 10 includes a transceiver module 11 and a processing module 12. The transceiver module 11 can implement corresponding communication functions, and the processing module 12 is used to process data. In other words, the transceiver module 11 is used to perform operations related to receiving and sending, and the processing module 12 is used to perform other operations besides receiving and sending. The transceiver module 11 can also be referred to as a communication interface or a communication unit.

[0247] Optionally, the device 10 may further include a storage module 13, which may be used to store instructions and / or data. The processing module 12 may read the instructions and / or data in the storage module so that the device implements the actions of the devices in the aforementioned method embodiments.

[0248] In one design, the apparatus 10 may correspond to the terminal device in the above method embodiment, or a component (such as a chip) of the terminal device.

[0249] The device 10 can implement the steps or processes executed by the terminal device in the above method embodiment, wherein the transceiver module 11 can be used to execute the transceiver-related operations of the terminal device in the above method embodiment, and the processing module 12 can be used to execute the processing-related operations of the terminal device in the above method embodiment.

[0250] In one possible implementation, the transceiver module 11 is configured to receive a first message indicating a first subcarrier spacing and a first transmission bandwidth. The transceiver module 11 is further configured to receive a second message indicating the first subcarrier spacing and a second transmission bandwidth. The processing module 12 is configured to determine a first channel bandwidth based on the first transmission bandwidth and the first correspondence. The processing module 12 is further configured to determine a second channel bandwidth based on the second transmission bandwidth and the first correspondence. The first correspondence includes a one-to-one correspondence between any one of M transmission bandwidths and one of M channel bandwidths, the first transmission bandwidth and the second transmission bandwidth being any two of the M transmission bandwidths, the first channel bandwidth and the second channel bandwidth being two of the M channel bandwidths, and M being an integer greater than or equal to 2.

[0251] The processing module 12 is further configured to determine a first guard band based on the first channel bandwidth and a second correspondence. The processing module 12 is further configured to determine a second guard band based on the second channel bandwidth and the second correspondence, wherein the second correspondence includes a one-to-one correspondence between any one of the M channel bandwidths and one of the M guard bands, the first guard band and the second guard band being two of the M guard bands, wherein the first channel bandwidth is smaller than the second channel bandwidth, and the first guard band is smaller than or equal to the second guard band.

[0252] When the device 10 is used to execute the method in Figure 5, the transceiver module 11 can be used to execute the steps of sending and receiving information in the method, such as steps S510 and S520; the processing module 12 can be used to execute the processing steps in the method, such as steps S530 and S540.

[0253] It should be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0254] In another design, the apparatus 10 may correspond to the network device in the above method embodiment, or a component (such as a chip) of the network device.

[0255] The device 10 can implement the steps or processes executed by the network device in the above method embodiment, wherein the transceiver module 11 can be used to perform the transceiver-related operations of the network device in the above method embodiment, and the processing module 12 can be used to perform the processing-related operations of the network device in the above method embodiment.

[0256] In one possible implementation, the transceiver module 11 is configured to send a first message, where the first message indicates a first subcarrier spacing and a first transmission bandwidth. The transceiver module 11 is further configured to send a second message, where the second message indicates the first subcarrier spacing and a second transmission bandwidth. The processing module 12 is configured to determine a first channel bandwidth based on the first transmission bandwidth and the first correspondence. The processing module 12 is further configured to determine a second channel bandwidth based on the second transmission bandwidth and the first correspondence. The first correspondence includes a one-to-one correspondence between any one of M transmission bandwidths and one of M channel bandwidths, the first transmission bandwidth and the second transmission bandwidth being any two of the M transmission bandwidths, the first channel bandwidth and the second channel bandwidth being two of the M channel bandwidths, and M being an integer greater than or equal to 2.

[0257] The processing module 12 is further configured to determine a first guard band based on the first channel bandwidth and a second correspondence. The processing module 12 is further configured to determine a second guard band based on the second channel bandwidth and the second correspondence, wherein the second correspondence includes a one-to-one correspondence between any one of the M channel bandwidths and one of the M guard bands, the first guard band and the second guard band being two of the M guard bands, wherein the first channel bandwidth is smaller than the second channel bandwidth, and the first guard band is smaller than or equal to the second guard band.

[0258] When the device 10 is used to execute the method in Figure 5, the transceiver module 11 can be used to execute the steps of sending and receiving information in the method, such as steps S510 and S520; the processing module 12 can be used to execute the processing steps in the method, such as steps S530 and S540.

[0259] It should be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0260] It should also be understood that the device 10 here is embodied in the form of a functional module. The term "module" here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor or a group processor, etc.) and memory for executing one or more software or firmware programs, a combined logic circuit and / or other suitable components that support the described functions. In an optional example, those skilled in the art will understand that the device 10 may be specifically the mobile management network element in the above-mentioned embodiment, and may be used to execute the various processes and / or steps corresponding to the mobile management network element in the above-mentioned method embodiments; or, the device 10 may be specifically the terminal device in the above-mentioned embodiment, and may be used to execute the various processes and / or steps corresponding to the terminal device in the above-mentioned method embodiments. To avoid repetition, it will not be described here.

[0261] The apparatus 10 of each of the above-described solutions has the function of implementing the corresponding steps performed by the devices (such as terminal devices and network devices) in the above-described methods. This function can be implemented by hardware, or by hardware executing corresponding software implementations. The hardware or software includes one or more modules corresponding to the above-described functions; for example, the transceiver module can be replaced by a transceiver (for example, the transmitting unit in the transceiver module can be replaced by a transmitter, and the receiving unit in the transceiver module can be replaced by a receiver), and other units, such as the processing module, can be replaced by a processor to respectively perform the transceiver operations and related processing operations in each method embodiment.

[0262] In addition, the transceiver module 11 may also be a transceiver circuit (for example, may include a receiving circuit and a sending circuit), and the processing module may be a processing circuit.

[0263] FIG7 is a schematic diagram of another communication device 20 provided in an embodiment of the present application. Device 20 includes a processor 21, which is configured to execute computer programs or instructions stored in memory 22, or read data / signaling stored in memory 22, to perform the methods described in the above method embodiments. Optionally, there may be one or more processors 21.

[0264] Optionally, as shown in FIG7 , the apparatus 20 further includes a memory 22 for storing computer programs or instructions and / or data. The memory 22 may be integrated with the processor 21 or may be separately provided. Optionally, there may be one or more memories 22 .

[0265] Optionally, as shown in Figure 7, the device 20 further includes a transceiver 23, which is used to receive and / or send signals. For example, the processor 21 is used to control the transceiver 23 to receive and / or send signals.

[0266] As a solution, the apparatus 20 is used to implement the operations performed by the terminal device in each of the above method embodiments.

[0267] It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0268] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory and / or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM includes the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0269] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated into the processor.

[0270] It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0271] 8 is a schematic diagram of a chip system 30 according to an embodiment of the present application. The chip system 30 (or also referred to as a processing system) includes a logic circuit 31 and an input / output interface 32.

[0272] The logic circuit 31 may be a processing circuit in the chip system 30. The logic circuit 31 may be coupled to a storage unit and call instructions in the storage unit so that the chip system 30 can implement the methods and functions of the various embodiments of the present application. The input / output interface 32 may be an input / output circuit in the chip system 30, outputting information processed by the chip system 30 or inputting data or signaling information to be processed into the chip system 30 for processing.

[0273] As a solution, the chip system 30 is used to implement the operations performed by the terminal device in the above various method embodiments.

[0274] For example, the logic circuit 31 is used to implement the processing-related operations performed by the terminal device in the above method embodiment; the input / output interface 32 is used to implement the sending and / or receiving-related operations performed by the terminal device in the above method embodiment.

[0275] An embodiment of the present application further provides a computer-readable storage medium on which computer instructions for implementing the methods executed by the device in the above-mentioned method embodiments are stored.

[0276] For example, when the computer program is executed by a computer, the computer can implement the methods executed by the terminal device or the network device in each embodiment of the above method.

[0277] An embodiment of the present application also provides a computer program product, comprising instructions, which, when executed by a computer, implement the methods performed by a terminal device or a network device in the above-mentioned method embodiments.

[0278] An embodiment of the present application also provides a communication system, including the aforementioned terminal device and network device.

[0279] The explanation of the relevant contents and beneficial effects of any of the above-mentioned devices can be referred to the corresponding method embodiments provided above, which will not be repeated here.

[0280] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0281] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0282] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0283] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0284] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0285] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0286] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: include: receiving a first message, the first message indicating a first subcarrier spacing and a first transmission bandwidth, the first transmission bandwidth corresponding to the first subcarrier spacing; receiving a second message indicating the first subcarrier spacing and a second transmission bandwidth, the second transmission bandwidth corresponding to the first subcarrier spacing; Determining a first channel bandwidth based on the first transmission bandwidth and a first correspondence, and determining a second channel bandwidth based on the second transmission bandwidth and the first correspondence, wherein the first correspondence includes a one-to-one correspondence between any one of M transmission bandwidths and one of the M channel bandwidths, the first transmission bandwidth and the second transmission bandwidth are any two of the M transmission bandwidths, the first channel bandwidth and the second channel bandwidth are two of the M channel bandwidths, and M is an integer greater than or equal to 2; A first guard band is determined according to the first channel bandwidth and a second corresponding relationship, and a second guard band is determined according to the second channel bandwidth and the second corresponding relationship, wherein the second corresponding relationship includes a one-to-one correspondence between any one of the M channel bandwidths and one of the M guard bands, and the first guard band and the second guard band are two of the M guard bands. The first channel bandwidth is smaller than the second channel bandwidth, and the first guard band is smaller than or equal to the second guard band.

2. A communication method, characterized in that: include: Sending a first message, where the first message indicates a first subcarrier spacing and a first transmission bandwidth, where the first transmission bandwidth corresponds to the first subcarrier spacing; sending a second message, where the second message indicates the first subcarrier spacing and a second transmission bandwidth, where the second transmission bandwidth corresponds to the first subcarrier spacing; Determining a first channel bandwidth based on the first transmission bandwidth and a first correspondence, and determining a second channel bandwidth based on the second transmission bandwidth and the first correspondence, wherein the first correspondence includes a one-to-one correspondence between any one of M transmission bandwidths and one of the M channel bandwidths, the first transmission bandwidth and the second transmission bandwidth are any two of the M transmission bandwidths, the first channel bandwidth and the second channel bandwidth are two of the M channel bandwidths, and M is an integer greater than or equal to 2; A first guard band is determined according to the first channel bandwidth and a second corresponding relationship, and a second guard band is determined according to the second channel bandwidth and the second corresponding relationship, wherein the second corresponding relationship includes a one-to-one correspondence between any one of the M channel bandwidths and one of the M guard bands, and the first guard band and the second guard band are two of the M guard bands. The first channel bandwidth is smaller than the second channel bandwidth, and the first guard band is smaller than or equal to the second guard band.

3. The method according to claim 1 or 2, characterized in that The first correspondence includes a one-to-one correspondence between any one of the M transmission bandwidths and one of the M channel bandwidths, including: The first corresponding relationship includes a one-to-one corresponding relationship between any one of the M transmission bandwidths and one of the M channel bandwidths under the first subcarrier spacing.

4. The method according to any one of claims 1 to 3, characterized in that The second correspondence includes a one-to-one correspondence between any one of the M channel bandwidths and one of the M guard bands, including: The second corresponding relationship includes a one-to-one corresponding relationship between any one of the M channel bandwidths and one of the M guard bands under the first subcarrier spacing.

5. The method according to any one of claims 1 to 4, characterized in that Under the first subcarrier spacing, the largest channel bandwidth among the M channel bandwidths is the third channel bandwidth, the third channel bandwidth corresponds to the third guard band, and the guard bands corresponding to the other channel bandwidths among the M channel bandwidths except the third channel bandwidth are all less than or equal to the third guard band.

6. The method according to claim 5, characterized in that The third channel bandwidth is the maximum channel bandwidth supported by the first frequency range FR1.

7. The method according to any one of claims 1 to 6, characterized in that Under the first subcarrier spacing, the smallest channel bandwidth among the M channel bandwidths is the fourth channel bandwidth, the fourth channel bandwidth corresponds to the fourth guard band, and the guard bands corresponding to the other channel bandwidths among the M channel bandwidths except the fourth channel bandwidth are all greater than or equal to the fourth guard band.

8. The method according to claim 7, characterized in that The fourth channel bandwidth is the minimum channel bandwidth supported by the first frequency range FR1.

9. The method according to any one of claims 1 to 8, characterized in that Under the first subcarrier spacing, the smallest guard band among the M guard bands is the fifth guard band, the fifth guard band corresponds to the fifth channel bandwidth, the guard band corresponding to the channel bandwidth of the M channel bandwidths that is less than the fifth channel bandwidth is less than or equal to the fifth guard band, and the guard band corresponding to the channel bandwidth of the M channel bandwidths that is greater than the fifth channel bandwidth is greater than or equal to the fifth guard band.

10. The method according to any one of claims 1 to 9, characterized in that Under the first subcarrier spacing, the largest guard band among the M guard bands is the sixth guard band, the sixth guard band corresponds to the sixth channel bandwidth, the guard band corresponding to the channel bandwidth of the M channel bandwidths that is less than the sixth channel bandwidth is less than or equal to the sixth guard band, and the guard band corresponding to the channel bandwidth of the M channel bandwidths that is greater than the sixth channel bandwidth is greater than or equal to the sixth guard band.

11. The method according to any one of claims 1 to 10, characterized in that The second corresponding relationship includes: The first row in the table represents different channel bandwidths, the first column represents different subcarrier spacings, the guard band j,i represents the guard band corresponding to the i-th channel bandwidth under the j-th subcarrier spacing, the first subcarrier spacing is any one of N subcarrier spacings, N is a positive integer, the i is greater than or equal to 1 and less than or equal to M, the j is greater than or equal to 1 and less than or equal to N, The first channel bandwidth and the second channel bandwidth are any two of the M channel bandwidths, the first guard band is the guard band corresponding to the first channel bandwidth under the first subcarrier spacing, and the second guard band is the guard band corresponding to the second channel bandwidth under the second subcarrier spacing.

12. The method according to any one of claims 1 to 11, characterized in that The first subcarrier spacing is 15 kHz, the first channel bandwidth is 30 MHz, the second channel bandwidth is 40 MHz, and the first guard band and the second guard band are 552.5 kHz; or The first subcarrier spacing is 15 KHz, the first channel bandwidth is 45 MHz, the second channel bandwidth is 50 MHz, and the first guard band and the second guard band are 692.5 KHz; or, The first subcarrier spacing is 30 KHz, the first channel bandwidth is 90 MHz, the second channel bandwidth is 100 MHz, and the first guard band and the second guard band are 845 KHz.

13. The method according to claim 1 or 2, characterized in that The first channel bandwidth, the first transmission bandwidth, and the first guard band satisfy the following relationship: GB channel1 =(BW Channel1 x 1000(KHz)-N RB1 x SCS x 12) / 2-SCS / 2 The second channel bandwidth, the second transmission bandwidth, and the second guard band satisfy the following relationship: GB channel2 =(BW Channel2 x 1000(KHz)-N RB2 x SCS x 12) / 2-SCS / 2 Among them, GB channel1 Indicates the first guard band, BW Channel1 represents the first channel bandwidth, N RB1 Indicates the first transmission bandwidth, GB channel2 Indicates the second guard band, BW Channel2 represents the second channel bandwidth, N RB2 represents the second transmission bandwidth, and SCS represents the first subcarrier spacing.

14. A communication device, characterized in that: Used to implement the method according to any one of claims 1 or 3 to 13.

15. The communication device according to claim 14, wherein: The communication device includes a terminal device or a chip.

16. A communication device, characterized in that: Used to implement the method according to any one of claims 2 to 13.

17. The communication device according to claim 16, wherein: The communication device includes a network device or a chip.

18. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and when the computer instructions are executed, the method according to any one of claims 1 to 13 is implemented.

19. A computer program product, characterized in that When the computer program product is executed, the method according to any one of claims 1 to 13 is implemented.

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