Signal transmission method and apparatus, device, chip, and storage medium

Abstract

Embodiments of the present application provide a signal transmission method and apparatus, a device, a chip, and a storage medium. The method comprises: a terminal device receives first information, wherein the first information is used for indicating a first location; and the terminal device receives a first signal and / or a first channel at the first location, wherein the first signal and / or the first channel are / is used by the terminal device to perform cell search.

Description

A signal transmission method, apparatus, device, chip, and storage medium Technical Field

[0001] This application relates to the field of mobile communication technology, specifically to a signal transmission method, apparatus, device, chip, and storage medium. Background Technology

[0002] In the current cell search process, the terminal device searches for the Synchronization Signal and PBCH block (SSB) on all grid points of the synchronization grid. The increase in the number of grid points will lead to a linear increase in cell search delay. How to reduce the delay of the cell search process is an urgent problem to be solved. Summary of the Invention

[0003] This application provides a signal transmission method, apparatus, device, chip, and storage medium.

[0004] In a first aspect, embodiments of this application provide a signal transmission method, including:

[0005] The terminal device receives first information, which indicates a first location; the terminal device receives a first signal and / or a first channel at the first location; the first signal and / or the first channel is used by the terminal device to perform cell search.

[0006] Secondly, embodiments of this application provide a signal transmission method, including:

[0007] The network device sends first information, which indicates a first location; the network device sends a first signal and / or a first channel at the first location; the first signal and / or the first channel is used by the terminal device to perform cell search.

[0008] Thirdly, embodiments of this application provide a signal transmission device applied to a terminal device, the signal transmission device comprising:

[0009] A first receiving unit is configured to receive first information, the first information indicating a first location; and to receive a first signal and / or a first channel at the first location; the first signal and / or the first channel being used by the terminal device to perform cell search.

[0010] Fourthly, embodiments of this application provide a signal transmission device applied to a network device, the signal transmission device comprising:

[0011] The first transmitting unit is configured to transmit first information, the first information being used to indicate a first location; transmit a first signal and / or a first channel at the first location; the first signal and / or the first channel being used by the terminal device to perform cell search.

[0012] Fifthly, embodiments of this application provide a terminal device including a processor and a memory. The memory stores a computer program, and the processor calls and runs the computer program stored in the memory to perform the signal transmission method as described in the first aspect.

[0013] Sixthly, embodiments of this application provide a network device including a processor and a memory. The memory stores a computer program, and the processor calls and runs the computer program stored in the memory to perform the signal transmission method as described in the second aspect.

[0014] In a seventh aspect, embodiments of this application provide a chip. The chip includes: a processor for retrieving and running a computer program from a memory, causing a device on which the chip is installed to perform the method described in either the first or second aspect; and a transceiver for receiving and sending information during the exchange of information with the device or the chip.

[0015] Eighthly, embodiments of this application provide a computer-readable storage medium for storing a computer program that causes a computer to perform the methods described in either the first or second aspect.

[0016] Ninthly, embodiments of this application provide a computer program product including computer program instructions that cause a computer to perform the method described in either the first or second aspect.

[0017] In a tenth aspect, embodiments of this application provide a computer program that, when run on a computer, causes the computer to perform the method described in either the first or second aspect.

[0018] This application provides a signal transmission method in which a terminal device can determine a first location corresponding to a first signal and / or a first channel based on received first information, thereby directly receiving the first signal and / or the first channel at that first location, narrowing the cell search range and reducing the latency of the cell search process. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 is a schematic diagram of an application scenario of an embodiment of this application;

[0021] Figure 2 is a schematic flowchart of a signal transmission method provided in an embodiment of this application;

[0022] Figure 3 is a schematic diagram of a first position provided in an embodiment of this application;

[0023] Figure 4 is a schematic diagram of a first frequency domain grid provided in an embodiment of this application;

[0024] Figure 5 is a schematic diagram of a second frequency domain grid provided in an embodiment of this application;

[0025] Figure 6 is a schematic diagram of a first frequency domain position provided in an embodiment of this application;

[0026] Figure 7 is a schematic diagram of a first carrier provided in an embodiment of this application;

[0027] Figure 8 is a schematic diagram of a first carrier provided in an embodiment of this application;

[0028] Figure 9 is a schematic diagram of a first cycle and a second cycle provided in an embodiment of this application;

[0029] Figure 10 is a schematic diagram of a first time-domain location provided in an embodiment of this application;

[0030] Figure 11 is a schematic diagram of a first time-domain location provided in an embodiment of this application;

[0031] Figure 12 is a schematic diagram of a first position provided in an embodiment of this application;

[0032] Figure 13 is a schematic flowchart of a signal transmission method provided in an embodiment of this application;

[0033] Figure 14 is a schematic diagram of the structure of a signal transmission device 1400 provided in an embodiment of this application;

[0034] Figure 15 is a structural schematic diagram of a signal transmission device 1500 provided in an embodiment of this application;

[0035] Figure 16 is a schematic structural diagram of a communication device provided in an embodiment of this application;

[0036] Figure 17 is a schematic structural diagram of a chip provided in an embodiment of this application;

[0037] Figure 18 is a schematic block diagram of a communication system provided in an embodiment of this application. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0039] Figure 1 is a schematic diagram of an application scenario of an embodiment of this application.

[0040] As shown in Figure 1, the communication system 100 may include a terminal device 110 and a network device 120. The network device 120 can communicate with the terminal device 110 via an air interface. Multi-service transmission is supported between the terminal device 110 and the network device 120.

[0041] It should be understood that the embodiments of this application are only illustrated by way of example with communication system 100, but the embodiments of this application are not limited thereto. That is to say, the technical solutions of the embodiments of this application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Internet of Things (IoT) system, Narrow Band Internet of Things (NB-IoT) system, enhanced Machine-Type Communications (eMTC) system, 5G communication system (also known as New Radio (NR) communication system), or future communication systems, etc.

[0042] In the communication system 100 shown in Figure 1, network device 120 may be an access network device that communicates with terminal device 110. The access network device can provide communication coverage for a specific geographical area and can communicate with terminal device 110 (e.g., user equipment (UE)) located within that coverage area.

[0043] Network device 120 may be an evolved Node B (eNB or eNodeB) in a Long Term Evolution (LTE) system, a Next Generation Radio Access Network (NG RAN) device, a base station (gNB) in an NR system, a radio controller in a Cloud Radio Access Network (CRAN), or a relay station, access point, vehicle-mounted device, wearable device, hub, switch, bridge, router, or network device in a future evolved Public Land Mobile Network (PLMN), etc.

[0044] Terminal device 110 can be any terminal device, including but not limited to terminal devices that are connected to network device 120 or other terminal devices via wired or wireless connections.

[0045] For example, the terminal device 110 can refer to an Ambient-Internet of Things (A-IoT) device, access terminal, UE, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The access terminal can be a cellular phone, cordless phone, Session Initiation Protocol (SIP) phone, IoT device, satellite handheld terminal, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, in-vehicle device, wearable device, terminal device in a 5G network, or terminal device in a future evolved network, etc.

[0046] Terminal device 110 can be used for device-to-device (D2D) communication.

[0047] The wireless communication system 100 may further include a core network device 130 that communicates with the network device 120. This core network device 130 may be a 5G core network (5G Core, 5GC) device, such as an Access and Mobility Management Function (AMF), an Authentication Server Function (AUSF), a User Plane Function (UPF), or a Session Management Function (SMF). Optionally, the core network device 130 may also be an Evolved Packet Core (EPC) device for an LTE network, such as a Session Management Function + Core Packet Gateway (SMF+PGW-C) device. It should be understood that SMF+PGW-C can simultaneously implement the functions of both SMF and PGW-C. During network evolution, the aforementioned core network device may also be called by other names, or new network entities may be formed by dividing the core network functions; this embodiment does not limit this.

[0048] The various functional units in the communication system 100 can also establish connections through interfaces to achieve communication.

[0049] For example, terminal device 110 establishes an air interface connection with access network equipment through the NR interface for transmitting user plane data and control plane signaling; terminal device 110 can establish a control plane signaling connection with AMF through the N1 interface; access network equipment, such as next-generation radio access base station (gNB), can establish a user plane data connection with UPF through NG-U (i.e., N3 interface); access network equipment can establish a control plane signaling connection with AMF through NG-C (i.e., N2 interface); UPF can establish a control plane signaling connection with SMF through N4 interface; UPF can interact with data network for user plane data through N6 interface; AMF can establish a control plane signaling connection with SMF through N11 interface; SMF can establish a control plane signaling connection with PCF through N7 interface.

[0050] Figure 1 exemplarily illustrates a network device 120, a core network device 130, and two terminal devices 110. Optionally, the wireless communication system 100 may include multiple network devices 120, and the coverage area of ​​each network device 120 may include other numbers of terminal devices 110. This application embodiment does not limit this.

[0051] It should be noted that Figure 1 is merely an example illustrating the system to which this application applies. Of course, the method shown in the embodiments of this application can also be applied to other systems. Furthermore, the terms "system" and "network" are often used interchangeably in this document. The term "and / or" in this document merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship. It should also be understood that "instruction" mentioned in the embodiments of this application can be a direct instruction, an indirect instruction, or an indication of a related relationship. For example, A instructing B can mean that A directly instructs B, for example, B can be obtained through A; it can also mean that A indirectly instructs B, for example, A instructs C, B can be obtained through C; or it can mean that there is a related relationship between A and B. It should also be understood that "correspondence" mentioned in the embodiments of this application can indicate a direct or indirect correspondence between two things, or an related relationship between two things, or a relationship of instruction and being instructed, configuration and being configured, etc. It should also be understood that the "predefined" or "predefined rules" mentioned in the embodiments of this application can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices), and this application does not limit the specific implementation method. For example, predefined can refer to those defined in a protocol. It should also be understood that in the embodiments of this application, the "protocol" can refer to standard protocols in the field of communication, such as LTE protocol, NR protocol, and related protocols applied to future communication systems, and this application does not limit this.

[0052] To facilitate understanding of the technical solutions of the embodiments of this application, the relevant technologies of the embodiments of this application are described below. The following relevant technologies are optional solutions and can be combined with the technical solutions of the embodiments of this application in any way, and they all fall within the protection scope of the embodiments of this application.

[0053] Resource grids and resource blocks:

[0054] For each parameter set and carrier, the Common Resource Block (CRB) is indicated from the higher-layer signaling. Begin, Define Subcarriers and A resource grid consists of Orthogonal Frequency Division Multiplexing (OFDM) symbols. Each transmission direction x has a set of resource grids; for a given antenna port p, subcarrier spacing configuration μ, and transmission direction, there exists one resource grid. The number of RBs contained in the carrier. This represents the number of consecutive subcarriers contained in one RB in the frequency domain.

[0055] The first reference point (Point A) is used as the common reference point for the resource block grid and is obtained as follows:

[0056] (1) The higher-layer parameter offsetToPointA provides a first offset value, which represents the offset between Point A and the first subcarrier, which is the lowest subcarrier of the lowest RB that coincides with the SSB used for initial cell selection. The first offset value is the number of RBs based on a 15kHz subcarrier spacing (FR1) or a 60kHz subcarrier spacing (FR2).

[0057] (2) For non-shared spectrum, the subcarrier spacing of the lowest RB is provided by the higher layer parameter subCarrierSpacingCommon.

[0058] (3) For shared spectrum, the subcarrier spacing of the lowest RB is the same as the subcarrier spacing of the SSB used for initial cell selection.

[0059] (4) For other scenarios, the higher-level parameter absoluteFrequencyPointA provides the frequency domain location of Point A based on the Absolute Radio Frequency Channel Number (ARFCN).

[0060] For the subcarrier spacing configuration μ, CRBs are numbered upwards from 0 in the frequency domain, and the center of subcarrier 0 of CRB 0 coincides with Point A. The relationship between the frequency domain CRB index and the resource unit RE(k,l) is as follows:

[0061] Here, k is defined based on Point A, thus ensuring that k=0 corresponds to the subcarrier center at Point A.

[0062] For the subcarrier spacing configuration μ, the Physical Resource Block (PRB) (Physical RB) is defined within the Bandwidth Part (BWP), and ranges from 0 to... Number, where i is the BWP index. PRB within BWP i and CRB The relationship is as follows:

[0063] in, The CRB index of the starting point of BWP i relative to CRB 0.

[0064] For the subcarrier spacing configuration μ, BWP is a subset of consecutive CRBs on the specified carrier. BWP start position and RB number Should satisfy and

[0065] In the current cell search process, the terminal device searches for the SSB on all grid points of the synchronization grid. The increase in the number of grid points will lead to a linear increase in cell search latency. How to reduce the latency of the cell search process is an urgent problem to be solved.

[0066] In view of this, embodiments of this application provide a signal transmission method in which a terminal device can determine a first location corresponding to a first signal and / or a first channel based on the received first information, thereby directly receiving the first signal and / or the first channel at that first location, narrowing the cell search range and reducing the latency of the cell search process.

[0067] To facilitate understanding of the technical solutions of the embodiments of this application, the technical solutions of this application are described in detail below through specific embodiments. The above-mentioned related technologies are optional solutions and can be arbitrarily combined with the technical solutions of the embodiments of this application, all of which fall within the protection scope of the embodiments of this application. The embodiments of this application include at least some of the following contents.

[0068] Figure 2 illustrates a signal transmission method provided in an embodiment of this application, applied to a terminal device. The method may include:

[0069] S200, The terminal device receives first information, which is used to indicate a first location; the terminal device receives a first signal and / or a first channel at the first location; the first signal and / or the first channel is used by the terminal device to perform cell search.

[0070] In this embodiment of the application, the terminal device receives first information, which is used to indicate a first location; the terminal device receives a first signal and / or a first channel at the first location; the first signal and / or the first channel is used by the terminal device to perform cell search.

[0071] In some embodiments, the network device sends first information to the terminal device to indicate a first location, and the terminal device receives a first signal and / or a first channel sent by the network device at the first location based on the first information, and performs cell search based on the first signal and / or the first channel.

[0072] In some implementations, the first information includes frequency domain location information and / or time domain location information; the frequency domain location information is used to determine a first frequency domain location in the first location, and the time domain location information is used to determine a first time domain location in the first location.

[0073] In some embodiments, the first position includes a first frequency domain position and / or a first time domain position. The first information may include frequency domain position information alone. Based on this, the terminal device can determine the first frequency domain position of the first signal and / or the first channel through the first information. In addition, the first information may also include time domain position information alone. Based on this, the terminal device can determine the first time domain position of the first signal and / or the first channel through the first information. Furthermore, the first information may also include both frequency domain position information and time domain position information simultaneously. Based on this, the terminal device can simultaneously lock the first frequency domain position of the first signal and / or the first channel in the frequency domain and the first time domain position in the time domain through the first information. Referring to FIG3, the first frequency domain position and the first time domain position of receiving the first signal and / or the first channel can be located directly according to the first information.

[0074] It is understandable that whether the first information includes frequency domain location information alone, time domain location information alone, or both frequency domain location information and time domain location information at the same time, it can narrow the search range of the cell, thereby reducing the latency of the cell search process.

[0075] In some implementations, the frequency domain location information includes one or more of the following: a location index of a first frequency domain location; a first offset value between the first frequency domain location and a second frequency domain location; a second offset value between the first frequency domain location and a reference frequency domain location; and a third offset value between the reference frequency domain location and the second frequency domain location.

[0076] In some implementations, the first frequency domain location is located on a first frequency domain grid.

[0077] In some embodiments, the terminal device can determine the first frequency domain position in the frequency domain based on the position index of the first frequency domain position.

[0078] For example, referring to Figure 4, a first frequency domain grid exists within a first frequency band. The first frequency domain grid corresponds to a set of frequency domain positions. The terminal device receives a first signal and / or a first channel at the set of frequency domain positions corresponding to the first frequency domain grid. That is, the first frequency domain position is a frequency domain position within the set of frequency domain positions corresponding to the first frequency domain grid. In one example, the bandwidth of the first frequency band is 100MHz, and the granularity of the first frequency domain grid is 1.2MHz. Therefore, the number of points in the first frequency domain grid within the first frequency band is... The corresponding position indices are 0, ..., 82. If the terminal device receives the first information, and the frequency domain position information in the first information indicates that the first signal and / or the first channel is located at the frequency domain position corresponding to position index #12 in the first frequency domain grid, then the terminal device determines the frequency domain position corresponding to position index #12 in the first frequency domain grid as the first frequency domain position. Based on this, the terminal device receives the first signal and / or the first channel at the first frequency domain position. Based on this, the terminal device can receive the first signal and / or the first channel at the determined first frequency domain position, thereby avoiding blind searching for the first signal and / or the first channel in the first frequency domain grid.

[0079] It should be noted that the location index of the first frequency domain location included in the frequency domain location information can be one or more, so that the terminal device can determine one or more first frequency domain locations based on one or more location indices, and receive the first signal and / or the first channel at one or more first frequency domain locations.

[0080] In some embodiments, the terminal device may determine the first frequency domain position in the frequency domain based on a first offset value between the first frequency domain position and a predetermined second frequency domain position.

[0081] In some implementations, the second frequency domain position is located on the second frequency domain grid; the frequency interval of the first frequency domain grid is smaller than the frequency interval of the second frequency domain grid.

[0082] For example, referring to Figure 5, the first frequency band contains not only a first frequency domain grid but also a second frequency domain grid. The second frequency domain grid also corresponds to a set of frequency domain positions. The frequency spacing of the second frequency domain grid is greater than that of the first frequency domain grid. The terminal device receives the second signal and / or the second channel at the set of frequency domain positions corresponding to the second frequency domain grid; that is, the second frequency domain position is a frequency domain position within the set of frequency domain positions corresponding to the second frequency domain grid. In one example, the bandwidth of the first frequency band is 100MHz, the granularity of the first frequency domain grid is 1.2MHz, and the granularity of the second frequency domain grid is 4.8MHz. Therefore, the number of points in the first frequency domain grid within the first frequency band is... The corresponding position indices are 0, ..., 82; the number of points in the second frequency domain raster within the first frequency band is... The corresponding position indices are 0, ..., 19. It can be seen that since the granularity of the second frequency domain grid is 4.8MHz / 1.2MHz = 4 times that of the first frequency domain grid, the number of points in the second frequency domain grid within the first frequency band is less than the number of points in the first frequency domain grid. Therefore, the number of times the terminal device blindly searches for the second signal and / or the second channel on the second frequency domain grid is significantly less than the number of times it blindly searches for the first signal and / or the first channel on the first frequency domain grid.

[0083] In some implementations, the second frequency domain location is the frequency domain location where the terminal device receives the second signal and / or the second channel.

[0084] In some embodiments, the second frequency domain position can be the frequency domain position of the terminal device when it receives the second signal and / or the second channel before receiving the first signal and / or the first channel. Thus, the terminal device knows the second frequency domain position in advance, and the terminal device can directly determine the first frequency domain position based on the first offset value.

[0085] For example, referring to FIG6, when the terminal device performs cell search based on the second frequency domain grid, it first receives the second signal and / or the second channel on the second frequency domain grid. If the second signal and / or the second channel are received at the frequency domain position with position index #1 in the second frequency domain grid, and the frequency domain position information indicates that the first offset value of the frequency domain position where the first signal and / or the first channel is located relative to the frequency domain position where the second signal and / or the second channel is located is 10RB corresponding to a 15kHz subcarrier spacing, then the terminal device can determine the first frequency domain position where the first signal and / or the first channel is located based on the frequency domain position corresponding to channel number #1 in the second frequency domain grid and the first offset value, and receive the first signal and / or the first channel at the first frequency domain position.

[0086] It should be noted that the first offset value between the first frequency domain position and the second frequency domain position included in the frequency domain position information can be one or more, so that the terminal device can determine one or more first frequency domain positions based on one or more first offset values, and receive the first signal and / or the first channel at one or more first frequency domain positions.

[0087] In some embodiments, the terminal device may determine the first frequency domain position in the frequency domain based on a third offset value between the reference frequency domain position and the second frequency domain position and a second offset value between the first frequency domain position and the reference frequency domain position.

[0088] For example, the frequency domain location information indicates that the third offset value between the reference frequency domain location and the second frequency domain location is 1RB, and the second offset value between the first frequency domain location and the reference frequency domain location is 12RB. Thus, the terminal device can determine that the first frequency domain location is offset by 13RB from the second frequency domain location, thereby determining the first frequency domain location where the first signal and / or the first channel is located based on the second frequency domain location, and receiving the first signal and / or the first channel at the first frequency domain location.

[0089] It should be noted that the second offset value and / or the third offset value included in the frequency domain location information can be one or more, so that the terminal device can determine one or more first frequency domain locations based on one or more second offset values ​​and / or the third offset values, and receive the first signal and / or the first channel at one or more first frequency domain locations.

[0090] In some implementations, one or more of the first offset value, the second offset value, and the third offset value are at least one RB or at least one subcarrier corresponding to the first subcarrier interval.

[0091] In some implementations, the first subcarrier spacing is determined based on one or more of the following: predefined information; the subcarrier spacing of a first signal and / or a first channel; the subcarrier spacing of a second signal and / or a second channel; and the first information.

[0092] For example, the first subcarrier spacing is 15kHz, and the first offset value, the second offset value, or the third offset value can be 10RB, 15RB, or 20RB corresponding to the 15kHz subcarrier spacing; the specific first subcarrier spacing, the first offset value, the second offset value, and the third offset value can be determined according to the actual situation, and this embodiment does not limit them here.

[0093] In some implementations, the first frequency domain position is one or more frequency domain positions within the first carrier; the frequency domain position information includes one or more of the following: the carrier identifier of the first carrier; the bandwidth of the first carrier; the frequency domain start position of the first carrier; a fourth offset value between the frequency domain start position of the first carrier and the second frequency domain position; a fifth offset value between the frequency domain start position of the first carrier and the reference frequency domain position; and a sixth offset value between the reference frequency domain position and the second frequency domain position.

[0094] In some embodiments, the terminal device may determine the first carrier based on the carrier identifier of the first carrier, and the first frequency domain position may be one or more frequency domain positions within the first carrier.

[0095] For example, the carrier identifier that directly indicates the first carrier in the frequency domain location information can be used to determine the frequency domain region corresponding to the first carrier based on the carrier identifier, and detect the first signal and / or the first channel on the first frequency domain grid within the first carrier.

[0096] In some embodiments, the terminal device may determine the first carrier based on the bandwidth of the first carrier and the frequency domain starting position of the first carrier, wherein the first frequency domain position is one or more frequency domain positions within the first carrier.

[0097] For example, the frequency domain location information can indicate the first carrier by indicating the bandwidth of the first carrier and the frequency domain start position of the first carrier. Based on this, the terminal device can determine the frequency domain region corresponding to the first carrier according to the bandwidth of the first carrier and the frequency domain start position of the first carrier, and detect the first signal and / or the first channel on the first frequency domain grid within the first carrier.

[0098] In some embodiments, the terminal device may first determine the frequency domain start position of the first carrier based on a fourth offset value between the frequency domain start position and the second frequency domain position of the first carrier, and then determine the first carrier based on the bandwidth of the first carrier and the frequency domain start position of the first carrier. The first frequency domain position is one or more frequency domain positions within the first carrier.

[0099] For example, referring to Figure 7, there is a first frequency domain grid in the first frequency band. The first frequency domain grid corresponds to a set of frequency domain positions. The first frequency domain position is the frequency domain position located within the first carrier in the set of frequency domain positions. In one example, the terminal device receives the second signal / channel at the second frequency domain position corresponding to position index #1 in the second frequency domain grid. The frequency domain position information indicates that the fourth offset value of the frequency domain start position of the first carrier relative to the second frequency domain position where the second signal / channel is located is 10 RB corresponding to a 15kHz subcarrier interval, and the bandwidth of the first carrier is 100 RB corresponding to a 15kHz subcarrier interval. Then, the terminal device can determine that the frequency domain range corresponding to the first carrier is the frequency domain region corresponding to 100 consecutive RBs after the second frequency domain position where the second signal / channel is located is offset by 10 RBs. Based on this, the terminal device receives the first signal and / or the first channel at one or more first frequency domain positions on the first frequency domain grid within the first carrier.

[0100] For example, after determining the frequency domain region corresponding to the first carrier, the terminal device can detect the first signal and / or the first channel on the first frequency domain grid within the first carrier. In one example, the grid points corresponding to position indices #20 to #34 in the first frequency domain grid are located within the frequency domain region corresponding to the first carrier. Based on this, the terminal device only needs to detect the first signal and / or the first channel on the grid points corresponding to position indices #20 to #34, without needing to detect on all grid points of the first frequency domain grid, thereby narrowing the search range for blind detection of the first signal and / or the first channel in the first frequency domain grid.

[0101] In some embodiments, the terminal device may first determine the frequency domain start position of the first carrier based on the fifth offset value between the frequency domain start position of the first carrier and the reference frequency domain position, and the sixth offset value between the reference frequency domain position and the second frequency domain position, and then determine the first carrier based on the bandwidth of the first carrier and the frequency domain start position of the first carrier, wherein the first frequency domain position is one or more frequency domain positions within the first carrier.

[0102] For example, referring to FIG8, the terminal device receives the second signal / channel at the second frequency domain position corresponding to position index #1 in the second frequency domain grid. The frequency domain position information indicates that the sixth offset value of the reference frequency domain position relative to the second frequency domain position is -2RB corresponding to a 15kHz subcarrier interval (a negative value indicates that the reference frequency domain position is lower than the second frequency domain position), and the fifth offset value of the frequency domain starting position of the first carrier relative to the reference frequency domain position is 12RB corresponding to a 15kHz subcarrier interval. Then the terminal device can determine that the frequency domain starting position of the first carrier is at the offset of the second frequency domain position -2RB + 12RB = 10RB. Furthermore, the frequency domain position information also indicates that the bandwidth of the first carrier is 100RB corresponding to a 15kHz subcarrier interval. Then the terminal device can determine that the frequency domain range corresponding to the first carrier is the frequency domain region corresponding to 100 consecutive RBs after the offset of the second frequency domain position by 10RB. Based on this, the terminal device receives the first signal and / or the first channel at one or more first frequency domain positions on the first frequency domain grid within the first carrier.

[0103] In some implementations, one or more of the bandwidth of the first carrier, the fourth offset value, the fifth offset value, and the sixth offset value are at least one RB or at least one subcarrier corresponding to the second subcarrier interval.

[0104] In some implementations, the second subcarrier spacing is determined based on one or more of the following: predefined information; the subcarrier spacing of the first signal and / or the first channel; the subcarrier spacing of the second signal and / or the second channel; and the first information.

[0105] For example, the second subcarrier spacing is 15kHz, and the bandwidth, fourth offset value, fifth offset value, or sixth offset value of the first carrier can be 10RB, 15RB, 20RB, or 100RB corresponding to the 15kHz subcarrier spacing; the specific second subcarrier spacing, bandwidth, fourth offset value, fifth offset value, and sixth offset value can be determined according to the actual situation, and are not limited in this embodiment.

[0106] In some implementations, the first time-domain position is one or more time-domain positions within a first period; the time-domain position information includes one or more of the following: the duration of the first period; the time slot index of the first time-domain position; a seventh offset value between the first time-domain position and the second time-domain position; an eighth offset value between the first time-domain position and the reference time-domain position; and a ninth offset value between the reference time-domain position and the second time-domain position.

[0107] In some embodiments, the terminal device receives a first signal and / or a first channel based on a first cycle, and the terminal device receives a second signal and / or a second channel based on a second cycle; the duration of the first cycle and / or the duration of the second cycle may be indicated by time-domain location information in the first information or by predefined information.

[0108] For example, referring to Figure 9, the duration of the first period is 160ms. The terminal device receives the first signal and / or the first channel at each grid point of the first frequency domain grid based on the first period of 160ms. If the terminal device does not receive the first signal and / or the first channel at the current grid point within 160ms, the terminal device continues to receive the first signal and / or the first channel at the next grid point. The first period of 160ms can be predefined information or indicated by the time domain position information in the first information.

[0109] For example, referring to Figure 9, the duration of the second period is 20ms. The terminal device receives the second signal and / or the second channel at each grid point of the second frequency domain grid based on the second period of 20ms. If the terminal device does not receive the second signal and / or the second channel at the current grid point within 20ms, the terminal device continues to receive the second signal and / or the second channel at the next grid point. The second period of 20ms can be predefined information or indicated by the first information.

[0110] In some embodiments, the terminal device determines the first time domain location based on the time slot index of the first time domain location indicated in the time domain location information.

[0111] For example, referring to FIG10, in order for the terminal device to receive the first signal and / or the first channel at a determined time-domain location, the time-domain location information can directly indicate the time slot index of the first time-domain location within the first period. In one example, the first period has 20 time slots and the second period has 160 time slots. The terminal device receives the second signal and / or the second channel at time slot #0 within the second period, and the first information indicates that the first time-domain location of the first signal and / or the first channel corresponds to time slot #2 within the first period, where time slot #2 is the time slot index corresponding to a 15kHz subcarrier spacing. Based on this, the terminal device can determine that it receives the first signal and / or the first channel in time slot #2 within the first period, thereby avoiding blind searching for the first signal and / or the first channel within the first period.

[0112] It should be noted that, considering that different subcarrier intervals correspond to different time slot lengths, such as a 15kHz subcarrier interval corresponding to a time slot length of 1ms and a 30kHz subcarrier interval corresponding to a time slot length of 0.5ms, it is necessary to determine the subcarrier interval corresponding to the first time slot index. For example, the 15kHz subcarrier interval corresponding to time slot #2 can be the same subcarrier interval as the first signal and / or the first channel, or the same subcarrier interval as the second signal and / or the second channel.

[0113] In some embodiments, the terminal device determines the first time domain position based on a seventh offset value between the first time domain position and the second time domain position indicated in the time domain position information.

[0114] In some implementations, the second time-domain location is the time-domain location at which the terminal device receives the second signal and / or the second channel.

[0115] For example, referring to FIG11, the time-domain location information may indicate a seventh offset value between the first time-domain location and the second time-domain location where the first signal and / or the first channel are located, so that the terminal device can determine the first time-domain location based on the seventh offset value and the second time-domain location. In one example, the first period is 160 time slots and the second period is 20 time slots. The terminal device receives the second signal and / or the second channel in time slot #0 of the second period, and the first information indicates that the seventh offset value of the first time-domain location where the first signal and / or the first channel are located relative to the second time-domain location where the second signal / channel is located is 1 time slot corresponding to a 15kHz subcarrier interval. Then the terminal device can determine that the first signal and / or the first channel is received in time slot #2 of the first period, thereby avoiding the terminal device blindly searching for the first signal and / or the first channel in the first period.

[0116] In some embodiments, the terminal device determines the first time domain position based on the eighth offset value between the first time domain position indicated in the time domain position information and the reference time domain position, and the ninth offset value between the reference time domain position and the second time domain position.

[0117] For example, the time-domain position information indicates that the ninth offset between the reference time-domain position and the second time-domain position is one time slot corresponding to a 15kHz subcarrier interval, and the eighth offset between the first time-domain position and the reference time-domain position is also one time slot corresponding to a 15kHz subcarrier interval. Thus, the terminal device can determine that the first time-domain position is offset by two time slots from the second time-domain position. If the second time-domain position is time slot #0 in the second period, then the first time-domain position is time slot #3 in the first period. The terminal device can then determine that the first signal and / or the first channel is received in time slot #3 in the first period, thereby avoiding the terminal device blindly searching for the first signal and / or the first channel in the first period.

[0118] In some implementations, one or more of the time length, the seventh offset value, the eighth offset value, and the ninth offset value are one or more first time domain units; the first time domain unit is any one of the following: subframe; millisecond; time slot or symbol corresponding to the third subcarrier interval.

[0119] In some implementations, one or more of the first subcarrier spacing, the second subcarrier spacing, and the third subcarrier spacing are determined based on one or more of the following: predefined information; the subcarrier spacing of the first signal and / or the first channel; the subcarrier spacing of the second signal and / or the second channel; and the first information.

[0120] For example, the third subcarrier spacing is 15kHz, and the time length, the seventh offset value, the eighth offset value, or the ninth offset value can be one or more time slots corresponding to the 15kHz subcarrier spacing; the specific third subcarrier spacing, time length, seventh offset value, eighth offset value, and ninth offset value can be determined according to the actual situation, and this embodiment does not limit them here.

[0121] In some implementations, the first signal and / or the second signal is a primary synchronization signal (PSS) or a secondary synchronization signal (SSS); the first channel and / or the second channel is a physical broadcast channel (PBCH).

[0122] In some implementations, the bandwidth of the first signal and / or the first channel is greater than the bandwidth of the second signal and / or the second channel.

[0123] For example, the bandwidth of the first signal and / or the first channel is 24MHz, and the bandwidth of the second signal and / or the second channel is 3MHz. That is, the terminal device first searches for the second signal and / or the second channel with a lower bandwidth and sampling rate. After obtaining the first information, it can receive the first signal and / or the first channel at the first position indicated by the first information, thereby reducing the number of times the terminal device blindly searches for the first signal and / or the first channel, so as to reduce the power consumption during the cell search process.

[0124] In some implementations, the first information is carried by a second signal and / or a second channel, or the first information is carried by a system message corresponding to the second signal and / or the second channel.

[0125] For example, referring to FIG12, the terminal device first receives a second signal and / or a second channel at a second time domain location and a second frequency domain location. The second signal and / or the second channel carries first information, or the system message corresponding to the second signal and / or the second channel contains the first information. After receiving the second signal and / or the second channel and obtaining the first information, the terminal device can determine the first time domain location and the first frequency domain location of the first signal and / or the first channel based on the first information, and receive the first signal and / or the first channel at the first time domain location and the first frequency domain location, thereby reducing the complexity and power consumption of blindly searching for the first signal and / or the first channel.

[0126] In summary, according to the signal transmission method of the embodiments of this application, the terminal device can determine the first position corresponding to the first signal and / or the first channel based on the received first information, thereby directly receiving the first signal and / or the first channel at the first position, narrowing the cell search range and reducing the latency of the cell search process.

[0127] The signal transmission method of the present invention has been described in detail above from the perspective of the terminal device with reference to Figure 2. The signal transmission method of the present invention has been described in detail below from the perspective of the network device with reference to Figure 13. It should be understood that the steps performed by the network device correspond to the steps performed by the terminal device. For the sake of brevity, repeated descriptions will be omitted appropriately below.

[0128] Figure 13 illustrates a signal transmission method provided in an embodiment of this application, which may include:

[0129] S1300, the network device sends first information, which is used to indicate a first location; the network device sends a first signal and / or a first channel at the first location; the first signal and / or the first channel is used by the terminal device to perform cell search.

[0130] In this embodiment of the application, the network device sends first information to indicate a first location; the network device sends a first signal and / or a first channel at the first location; the first signal and / or the first channel are used by the terminal device to perform cell search.

[0131] In some embodiments, the network device sends first information to the terminal device to indicate a first location, and the terminal device receives a first signal and / or a first channel sent by the network device at the first location based on the first information, and performs cell search based on the first signal and / or the first channel.

[0132] In some implementations, the first information includes frequency domain location information and / or time domain location information; the frequency domain location information is used to determine the first frequency domain location of the first location, and the time domain location information is used to determine the first time domain location of the first location.

[0133] In some embodiments, the first position includes a first frequency domain position and / or a first time domain position. The first information may include frequency domain position information alone. Based on this, the terminal device can determine the first frequency domain position of the first signal and / or the first channel through the first information. In addition, the first information may also include time domain position information alone. Based on this, the terminal device can determine the first time domain position of the first signal and / or the first channel through the first information. Furthermore, the first information may also include both frequency domain position information and time domain position information simultaneously. Based on this, the terminal device can simultaneously lock the first frequency domain position of the first signal and / or the first channel in the frequency domain and the first time domain position in the time domain through the first information.

[0134] It is understandable that whether the first information includes frequency domain location information alone, time domain location information alone, or both frequency domain location information and time domain location information at the same time, it can narrow the search range of the cell, thereby reducing the latency of the cell search process.

[0135] In some implementations, the frequency domain location information includes one or more of the following: a location index of a first frequency domain location; a first offset value between the first frequency domain location and a second frequency domain location; a second offset value between the first frequency domain location and a reference frequency domain location; and a third offset value between the reference frequency domain location and the second frequency domain location.

[0136] In some embodiments, the terminal device can determine the first frequency domain position in the frequency domain based on the position index of the first frequency domain position.

[0137] In some embodiments, the terminal device may determine the first frequency domain position in the frequency domain based on a first offset value between the first frequency domain position and a predetermined second frequency domain position.

[0138] In some embodiments, the terminal device may determine the first frequency domain position in the frequency domain based on a third offset value between the reference frequency domain position and the second frequency domain position and a second offset value between the first frequency domain position and the reference frequency domain position.

[0139] In some implementations, the second frequency domain location is the frequency domain location where the terminal device receives the second signal and / or the second channel.

[0140] In some implementations, one or more of the first offset value, the second offset value, and the third offset value are at least one RB or at least one subcarrier corresponding to the first subcarrier interval.

[0141] In some implementations, the first frequency domain position is one or more frequency domain positions within the first carrier; the frequency domain position information includes one or more of the following: the carrier identifier of the first carrier; the bandwidth of the first carrier; the frequency domain start position of the first carrier; a fourth offset value between the frequency domain start position of the first carrier and the second frequency domain position; a fifth offset value between the frequency domain start position of the first carrier and the reference frequency domain position; and a sixth offset value between the reference frequency domain position and the second frequency domain position.

[0142] In some embodiments, the terminal device may determine the first carrier based on the carrier identifier of the first carrier, and the first frequency domain position may be one or more frequency domain positions within the first carrier.

[0143] In some embodiments, the terminal device may determine the first carrier based on the bandwidth of the first carrier and the frequency domain starting position of the first carrier, wherein the first frequency domain position is one or more frequency domain positions within the first carrier.

[0144] In some embodiments, the terminal device may first determine the frequency domain start position of the first carrier based on a fourth offset value between the frequency domain start position and the second frequency domain position of the first carrier, and then determine the first carrier based on the bandwidth of the first carrier and the frequency domain start position of the first carrier. The first frequency domain position is one or more frequency domain positions within the first carrier.

[0145] In some embodiments, the terminal device may first determine the frequency domain start position of the first carrier based on the fifth offset value between the frequency domain start position of the first carrier and the reference frequency domain position, and the sixth offset value between the reference frequency domain position and the second frequency domain position, and then determine the first carrier based on the bandwidth of the first carrier and the frequency domain start position of the first carrier, wherein the first frequency domain position is one or more frequency domain positions within the first carrier.

[0146] In some implementations, one or more of the bandwidth of the first carrier, the fourth offset value, the fifth offset value, and the sixth offset value are at least one RB or at least one subcarrier corresponding to the second subcarrier interval.

[0147] In some implementations, the first time-domain position is one or more time-domain positions within a first period; the time-domain position information includes one or more of the following: the duration of the first period; the time slot index of the first time-domain position; a seventh offset value between the first time-domain position and the second time-domain position; an eighth offset value between the first time-domain position and the reference time-domain position; and a ninth offset value between the reference time-domain position and the second time-domain position.

[0148] In some implementations, the second time-domain location is the time-domain location at which the terminal device receives the second signal and / or the second channel.

[0149] In some implementations, one or more of the time length, the seventh offset value, the eighth offset value, and the ninth offset value are one or more first time domain units; the first time domain unit is any one of the following: subframe; millisecond; time slot or symbol corresponding to the third subcarrier interval.

[0150] In some implementations, one or more of the first subcarrier spacing, the second subcarrier spacing, and the third subcarrier spacing are determined based on one or more of the following: predefined information; the subcarrier spacing of the first signal and / or the first channel; the subcarrier spacing of the second signal and / or the second channel; and the first information.

[0151] In some implementations, the first frequency domain location is located on a first frequency domain grid, and / or the second frequency domain location is located on a second frequency domain grid.

[0152] In some implementations, the frequency spacing of the first frequency domain grid is smaller than the frequency spacing of the second frequency domain grid.

[0153] In some implementations, the bandwidth of the first signal and / or the first channel is greater than the bandwidth of the second signal and / or the second channel.

[0154] For example, the bandwidth of the first signal and / or the first channel is 24MHz, and the bandwidth of the second signal and / or the second channel is 3MHz. That is, the terminal device first searches for the second signal and / or the second channel with a lower bandwidth and sampling rate. After obtaining the first information, it can receive the first signal and / or the first channel at the first position indicated by the first information, thereby reducing the number of times the terminal device blindly searches for the first signal and / or the first channel, so as to reduce the power consumption during the cell search process.

[0155] In some implementations, the first information is carried by a second signal and / or a second channel, or the first information is carried by a system message corresponding to the second signal and / or the second channel.

[0156] For example, the terminal device first receives a second signal and / or a second channel at a second time domain location and a second frequency domain location. The second signal and / or the second channel carries first information, or the system message corresponding to the second signal and / or the second channel contains the first information. After receiving the second signal and / or the second channel and obtaining the first information, the terminal device can determine the first time domain location and the first frequency domain location of the first signal and / or the first channel based on the first information, and receive the first signal and / or the first channel at the first time domain location and the first frequency domain location, thereby reducing the complexity and power consumption of blindly searching for the first signal and / or the first channel.

[0157] In some implementations, the first signal and / or the second signal is the primary synchronization signal PSS or the auxiliary synchronization signal SSS; the first channel and / or the second channel is the physical broadcast channel PBCH.

[0158] In summary, according to the signal transmission method of the embodiments of this application, the terminal device can determine the first position corresponding to the first signal and / or the first channel based on the received first information, thereby directly receiving the first signal and / or the first channel at the first position, narrowing the cell search range and reducing the latency of the cell search process.

[0159] The signal transmission method provided in the embodiments of this application has been described above. To facilitate understanding of the embodiments of this application, the following describes possible implementation schemes of the signal transmission method applicable to the embodiments of this application based on the interaction process between the terminal device and the network device.

[0160] In some embodiments, the terminal device receives first information, which is used to indicate time-domain related information (time-domain location information in the above embodiments) and / or frequency-domain related information (frequency-domain location information in the above embodiments) corresponding to the first signal and / or the first channel, and the first signal and / or the first channel is used for cell search.

[0161] For example, as shown in Figure 3, if the terminal device receives first information indicating that a first signal and / or a first channel are transmitted at (a first time domain location and a first frequency domain location), then the terminal device can receive the first signal and / or the first channel at the first time domain location and the first frequency domain location to perform cell search. Specifically, the first signal can be a synchronization signal, such as PSS or SSS, and the first channel can be a broadcast channel, such as PBCH.

[0162] Example 1: Synchronization Grid

[0163] In some embodiments, the terminal device receives a first signal and / or a first channel on a first grid (the first frequency domain grid in the above embodiments), wherein the first grid is a set of predefined frequency positions.

[0164] In some embodiments, to avoid blind detection of the first signal and / or the first channel at all frequency domain positions in the first grid by the terminal device, the first information indicates the channel number (position index of the first frequency domain position in the above embodiments) corresponding to the frequency domain position (first frequency domain position in the above embodiments) of the first signal and / or the first channel in the first grid.

[0165] For example, as shown in Figure 4, the first grid within the first frequency band corresponds to a set of frequency domain positions. Specifically, for example, if the bandwidth of the first frequency band is 100MHz and the granularity of the first grid is 1.2MHz, then the number of first grid points within the first frequency band is... The corresponding channel numbers are 0, ..., 82. If the terminal device receives the first information, and the first information indicates that the first signal and / or the first channel is located at the frequency domain position corresponding to channel number #12 in the first grid, then the terminal device receives the first signal and / or the first channel at the frequency domain position corresponding to channel number #12 in the first grid, so that the terminal device can receive the first signal and / or the first channel at the determined frequency domain position (first frequency domain position), thereby avoiding blind searching for the first signal and / or the first channel on the first grid.

[0166] In some other embodiments, the first information indicates a first offset value of the frequency domain location (first frequency domain location) of the first signal and / or the first channel relative to the frequency domain location (second frequency domain location) of the second signal and / or the second channel.

[0167] In some embodiments, for the second signal and / or the second channel, the terminal device receives the second signal and / or the second channel on a second grid (the second frequency domain grid in the above embodiments), the second grid being a set of predefined frequency domain locations.

[0168] In some embodiments, the frequency interval of the second grid is greater than the frequency interval of the first grid. For example, the frequency interval of the second grid is N times the frequency interval of the first grid, where N is a positive integer greater than 1.

[0169] In some embodiments, the first offset value is an integer number of RBs (at least one RB in the above embodiments) or an integer number of subcarriers (at least one subcarrier in the above embodiments) corresponding to the first subcarrier interval. The first subcarrier interval is determined based on at least one of the following: a predefined subcarrier interval, the subcarrier interval of a first signal and / or a first channel, the subcarrier interval of a second signal and / or a second channel, or first information.

[0170] For example, as shown in Figure 5, in addition to the first grid, there is also a second grid within the first frequency band, corresponding to a set of frequency domain positions, and the frequency spacing of the second grid is greater than that of the first grid. Specifically, for example, if the bandwidth of the first frequency band is 100MHz, the granularity of the first grid is 1.2MHz, and the granularity of the second grid is 4.8MHz, then the number of first grid points within the first frequency band is... Corresponding channel numbers 0,…,82; the number of second grid points within the first frequency band is The corresponding channel numbers are 0, ..., 19. It can be seen that since the granularity of the second grid is 4.8MHz / 1.2MHz = 4 times that of the first grid, the number of points in the second grid within the first frequency band is less than the number of points in the first grid. Therefore, the number of times the terminal device blindly searches for the second signal and / or the second channel on the second grid is significantly less than the number of times it blindly searches for the first signal and / or the first channel on the first grid.

[0171] For example, as shown in Figure 6, when the terminal device performs cell search based on the second grid, it first receives the second signal and / or the second channel on the second grid. If the second signal and / or the second channel are received at the frequency domain position corresponding to channel number #1 in the second grid, and the first information indicates that the first offset value of the frequency domain position of the first signal and / or the first channel relative to the frequency domain position of the second signal and / or the second channel is 10RB corresponding to the 15kHz subcarrier spacing (the first subcarrier spacing in the above embodiment), then the terminal device can determine the frequency domain position of the first signal and / or the first channel based on the frequency domain position corresponding to channel number #1 in the second grid and the first offset value, and receive the first signal and / or the first channel at that frequency domain position.

[0172] Meanwhile, the reference subcarrier spacing of 15kHz for the first offset value 10RB can be a predefined subcarrier spacing, or the same subcarrier spacing as the first signal and / or the first channel, or the same subcarrier spacing as the second signal and / or the second channel, or the subcarrier spacing indicated in the first information.

[0173] In some embodiments, the bandwidth of the second signal and / or the second channel is less than the bandwidth of the first signal and / or the first channel. For example, the first signal / second signal is a synchronization signal, such as PSS or SSS, and the first channel / second channel can be a broadcast channel, such as PBCH. If the bandwidth of the first signal and / or the first channel is 24MHz and the bandwidth of the second signal and / or the second channel is 3MHz, then the terminal device first searches for the second signal and / or the second channel with a lower bandwidth and sampling rate. After acquiring the first information, it can receive the first signal and / or the first channel at the first position indicated by the first information (the first time domain position and the first frequency domain position), thereby reducing the number of times the terminal device blindly searches for the first signal and / or the first channel, and thus reducing power consumption during the cell search process.

[0174] Example 2: Carrier

[0175] In some embodiments, the first information indicates a first carrier (indicated by a carrier identifier), and the terminal device receives a first signal and / or a first channel within the first carrier.

[0176] In some embodiments, the terminal device receives a first signal and / or a first channel on a first grid within a first carrier.

[0177] In some embodiments, the first information indicates the frequency domain start position and bandwidth of the first carrier (indicating the first carrier by indicating the frequency domain start position and bandwidth).

[0178] As one possible implementation, the first information indicates a second offset value (the fourth offset value in the above embodiment) of the frequency domain start position of the first carrier relative to the frequency domain position (second frequency domain position) of the second signal and / or the second channel. That is, the frequency domain start position is determined by the frequency domain position of the second signal and / or the second channel and the second offset value, and then the first carrier is determined according to the determined frequency domain start position and bandwidth.

[0179] For example, as shown in Figure 7, the terminal device receives the second signal and / or the second channel at the frequency domain position corresponding to channel number #1 in the second grid, and the first information indicates that the second offset value (the fourth offset value in Figure 7) of the frequency domain starting position of the first carrier relative to the frequency domain position of the second signal and / or the second channel is 10 RB corresponding to a 15kHz subcarrier interval (the second subcarrier interval in the above embodiment), and the bandwidth of the first carrier is 100 RB corresponding to a 15kHz subcarrier interval. Then the terminal device can determine that the frequency domain range corresponding to the first carrier is the frequency domain region corresponding to 100 consecutive RBs after the frequency domain position of the second signal and / or the second channel is offset by 10 RBs.

[0180] Based on Figure 5, after determining the frequency domain range corresponding to the first carrier, the terminal device can detect the first signal and / or the first channel in the first grid within the first carrier. For example, if the grid points corresponding to channel numbers #20 to #34 in the first grid are located within the first carrier, the terminal device will only detect the first signal and / or the first channel at the grid points corresponding to channel numbers #20 to #34 in the first grid, thereby narrowing the search range for blind detection of the first signal and / or the first channel in the first grid.

[0181] As another possible implementation, the first information indicates a third offset value (a sixth offset value in the above embodiment) of the first reference point (the reference frequency domain position in the above embodiment) relative to the frequency domain position of the second signal and / or the second channel, and a fourth offset value (a fifth offset value in the above embodiment) of the frequency domain start position of the first carrier relative to the first reference point. That is, the first reference point is first determined by the frequency domain position of the second signal and / or the second channel and the third offset value, then the frequency domain start position is determined according to the first reference point and the fourth offset value, and finally the first carrier is determined according to the determined frequency domain start position and bandwidth.

[0182] In some embodiments, at least one of the bandwidth of the first carrier, the second offset value, the third offset value, and the fourth offset value is an integer number of RBs or subcarriers corresponding to the second subcarrier interval, and the second subcarrier interval is determined based on at least one of the following: a predefined subcarrier interval, the subcarrier interval of the first signal and / or the first channel, the subcarrier interval of the second signal and / or the second channel, and the first information.

[0183] For example, as shown in Figure 8, the terminal device receives the second signal and / or the second channel at the frequency domain position corresponding to channel number #1 in the second grid, and the first information indicates that the third offset value (the sixth offset value in Figure 8) of the first reference point (the reference frequency domain position in Figure 8) relative to the frequency domain position of the second signal and / or the second channel is -2RB corresponding to a 15kHz subcarrier spacing (a negative value indicates that the frequency domain position of the first reference point is lower than the frequency domain position of the second signal and / or the second channel), and the fourth offset value (the fifth offset value in Figure 8) of the frequency domain starting position of the first carrier relative to the first reference point is 12RB corresponding to a 15kHz subcarrier spacing, then the terminal device can determine that the frequency domain starting position of the first carrier is offset by -2RB + 12RB = 10RB from the frequency domain position of the second signal and / or the second channel.

[0184] It should be noted that the method for determining the first carrier bandwidth and how the terminal device receives the second signal and / or the second channel within the first carrier are the same as in the example above, and will not be repeated here. In addition, the second offset value of 10RB, the third offset value of -2RB, the fourth offset value of 12RB, and the second reference subcarrier spacing of 15kHz with a first carrier bandwidth of 100RB can be a predefined subcarrier spacing, or the same subcarrier spacing as the first signal and / or the first channel, or the subcarrier spacing of the second signal and / or the second channel, or the subcarrier spacing indicated in the first information.

[0185] Example 3: Time Domain Information

[0186] In some embodiments, the terminal device receives a first signal and / or a first channel based on a first period, the first period being determined based on at least one of the following: a predefined period, first information. Further, in some embodiments, the terminal device receives a second signal and / or a second channel based on a second period, the second period being determined based on at least one of the following: a predefined period, first information.

[0187] For example, as shown in Figure 9, the first period is 160ms. The terminal device receives the first signal and / or the first channel at each grid point of the first grid based on this first period of 160ms. If the first signal and / or the first channel is not received at the current grid point within 160ms, the device continues to receive the first signal and / or the first channel at the next grid point. It should be noted that the 160ms first period can be a predefined period or the period indicated by the first information.

[0188] For another example, if the second period is 20ms, the terminal device receives the second signal and / or the second channel at each grid point of the second grid based on the 20ms second period. If the second signal and / or the second channel is not received at the current grid point within 20ms, the device continues to receive the second signal and / or the second channel at the next grid point. It should be noted that the 20ms second period can be a predefined period, or it can be the period indicated by the first information after receiving the first information.

[0189] In some embodiments, in order to enable the terminal device to receive the first signal and / or the first channel at a determined time domain location (the first time domain location in the above embodiments), the first information indicates the first time slot index (the time slot index of the first time domain location in the above embodiments) corresponding to the time domain location where the first signal and / or the first channel is located within a first period.

[0190] In some embodiments, the subcarrier spacing corresponding to the first time slot index is determined based on one of the following: the subcarrier spacing of the first signal and / or the first channel, and the subcarrier spacing of the second signal and / or the second channel.

[0191] For example, as shown in Figure 10, the first period has 20 time slots, and the second period has 160 time slots. The terminal device receives the second signal and / or the second channel in time slot #0 of the second period, and the first information indicates that the time domain location of the first signal and / or the first channel corresponds to time slot #2 of the first period, where time slot #2 is the time slot index corresponding to a 15kHz subcarrier spacing. Based on this, the terminal device can determine that it receives the first signal and / or the first channel in time slot #2 of the first period, thereby avoiding blindly searching for the first signal and / or the first channel within the first period.

[0192] In some embodiments, considering that different subcarrier intervals correspond to different time slot lengths, such as a 15kHz subcarrier interval corresponding to a time slot length of 1ms and a 30kHz subcarrier interval corresponding to a time slot length of 0.5ms, it is necessary to determine the subcarrier interval corresponding to the first time slot index. For example, the 15kHz subcarrier interval corresponding to time slot #2 can be the same subcarrier interval as the first signal and / or the first channel, or the same subcarrier interval as the second signal and / or the second channel.

[0193] In some embodiments, the first information indicates a fifth offset value (the seventh offset value in the above embodiments) relative to the time domain location of the first signal and / or the first channel. In some embodiments, the fifth offset value is an integer number of first time domain units, where the first time domain unit is one of the following: a subframe or millisecond, the number of time slots or symbols corresponding to the subcarrier spacing of the first signal and / or the first channel, or the number of time slots or symbols corresponding to the subcarrier spacing of the second signal and / or the second channel.

[0194] For example, in Figure 11, the first period has 160 time slots and the second period has 20 time slots. The terminal device receives the second signal and / or the second channel in time slot #0 of the second period. The first information indicates that the fifth offset value (the seventh offset value in Figure 11) of the time domain position of the second signal and / or the second channel relative to the time domain position of the second signal and / or the second channel is 1 time slot corresponding to a 15kHz subcarrier spacing. Then the terminal device can determine that the first signal and / or the first channel is received in time slot #2 of the first period, thereby avoiding the terminal device blindly searching for the first signal and / or the first channel in the first period.

[0195] In some embodiments, the subcarrier spacing of the first signal and / or the first channel is determined based on at least one of the following: a predefined subcarrier spacing, first information, and the subcarrier spacing of the second signal and / or the second channel being a predefined subcarrier spacing.

[0196] For example, the subcarrier spacing of the second signal and / or the second channel can be a predefined subcarrier spacing, such as 15 kHz, so the terminal device can receive the second signal and / or the second channel based on the predefined subcarrier spacing. Similarly, the subcarrier spacing of the first signal and / or the first channel can also be a predefined subcarrier spacing; or, considering that the first signal and / or the first channel is received after the second signal and / or the second channel, the subcarrier spacing of the first signal and / or the first channel can be indicated by the first information.

[0197] In some embodiments, the first information may be carried in the second signal and / or the second channel, or may be included in the system message corresponding to the second signal and / or the second channel.

[0198] For example, as shown in Figure 12, the terminal device first receives a second signal and / or a second channel at a second time domain location and a second frequency domain location. The second signal and / or the second channel carries first information, or the system message corresponding to the second signal and / or the second channel contains the first information. At this time, the terminal device can determine the first time domain location and the first frequency domain location of the first signal and / or the first channel based on the first information, and receive the first signal and / or the first channel at the first time domain location and the first frequency domain location, thereby reducing the complexity and power consumption of blindly searching for the first signal and / or the first channel.

[0199] The preferred embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solutions of this application, and these simple modifications all fall within the protection scope of this application. For example, the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this application will not describe the various possible combinations separately. Furthermore, various different embodiments of this application can also be arbitrarily combined, as long as they do not violate the spirit of this application, they should also be considered as the content disclosed in this application. Moreover, without conflict, the various embodiments and / or the technical features in the various embodiments described in this application can be arbitrarily combined with the prior art, and the resulting technical solutions should also fall within the protection scope of this application.

[0200] It should also be understood that in the various method embodiments of this application, the sequence number of each process does not imply 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 this application. Furthermore, in the embodiments of this application, the terms "downlink," "uplink," and "sidelink" are used to indicate the transmission direction of signals or data. "Downlink" indicates that the transmission direction of signals or data is a first direction from the site to the user equipment in the cell; "uplink" indicates that the transmission direction of signals or data is a second direction from the user equipment in the cell to the site; and "sidelink" indicates that the transmission direction of signals or data is a third direction from user equipment 1 to user equipment 2. For example, "downlink signal" indicates that the transmission direction of the signal is the first direction. Additionally, in the embodiments of this application, the term "and / or" is merely a description of the association relationship between related objects, indicating that three relationships can exist. Specifically, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0201] Figure 14 is a schematic diagram of the structure of a signal transmission device 1400 provided in an embodiment of this application, which is applied to a terminal device. As shown in Figure 14, the signal transmission device 1400 includes:

[0202] The first receiving unit 1401 is configured to receive first information, the first information being used to indicate a first location; and to receive a first signal and / or a first channel at the first location; the first signal and / or the first channel being used by the terminal device to perform cell search.

[0203] In some embodiments, the first information includes frequency domain location information and / or time domain location information; the frequency domain location information is used to determine a first frequency domain location of the first location, and the time domain location information is used to determine a first time domain location of the first location.

[0204] In some embodiments, the frequency domain location information includes one or more of the following: a location index of a first frequency domain location; a first offset value between the first frequency domain location and a second frequency domain location; a second offset value between the first frequency domain location and a reference frequency domain location; and a third offset value between the reference frequency domain location and the second frequency domain location.

[0205] In some embodiments, the second frequency domain location is the frequency domain location where the terminal device receives the second signal and / or the second channel.

[0206] In some embodiments, one or more of the first offset value, the second offset value, and the third offset value are at least one RB or at least one subcarrier corresponding to the first subcarrier interval.

[0207] In some embodiments, the first frequency domain position is one or more frequency domain positions within a first carrier; the frequency domain position information includes one or more of the following: the carrier identifier of the first carrier; the bandwidth of the first carrier; the frequency domain start position of the first carrier; a fourth offset value between the frequency domain start position of the first carrier and a second frequency domain position; a fifth offset value between the frequency domain start position of the first carrier and a reference frequency domain position; and a sixth offset value between the reference frequency domain position and the second frequency domain position.

[0208] In some embodiments, one or more of the bandwidth of the first carrier, the fourth offset value, the fifth offset value, and the sixth offset value are at least one RB or at least one subcarrier corresponding to the second subcarrier interval.

[0209] In some embodiments, the first time-domain position is one or more time-domain positions within a first period; the time-domain position information includes one or more of the following: the duration of the first period; the time slot index of the first time-domain position; a seventh offset value between the first time-domain position and the second time-domain position; an eighth offset value between the first time-domain position and the reference time-domain position; and a ninth offset value between the reference time-domain position and the second time-domain position.

[0210] In some embodiments, the second time-domain location is the time-domain location where the terminal device receives the second signal and / or the second channel.

[0211] In some embodiments, one or more of the time length, the seventh offset value, the eighth offset value, and the ninth offset value are one or more first time domain units; the first time domain unit is any one of the following: subframe; millisecond; time slot or symbol corresponding to the third subcarrier interval.

[0212] In some embodiments, one or more of the first subcarrier spacing, the second subcarrier spacing, and the third subcarrier spacing are determined based on one or more of the following: predefined information; the subcarrier spacing of the first signal and / or the first channel; the subcarrier spacing of the second signal and / or the second channel; and the first information.

[0213] In some embodiments, the first frequency domain position is located on a first frequency domain grid, and / or the second frequency domain position is located on a second frequency domain grid.

[0214] In some embodiments, the frequency spacing of the first frequency domain grid is smaller than the frequency spacing of the second frequency domain grid.

[0215] In some embodiments, the bandwidth of the first signal and / or the first channel is greater than the bandwidth of the second signal and / or the second channel.

[0216] In some embodiments, the first information is carried by the second signal and / or the second channel, or the first information is carried by a system message corresponding to the second signal and / or the second channel.

[0217] In some embodiments, the first signal and / or the second signal is a primary synchronization signal (PSS) or an auxiliary synchronization signal (SSS); the first channel and / or the second channel is a physical broadcast channel (PBCH).

[0218] Figure 15 is a schematic diagram of the structure of a signal transmission device 1500 provided in an embodiment of this application, which is applied to a network device. As shown in Figure 15, the signal transmission device 1500 includes:

[0219] The first transmitting unit 1501 is configured to transmit first information, the first information being used to indicate a first location; transmit a first signal and / or a first channel at the first location; the first signal and / or the first channel being used by the terminal device to perform cell search.

[0220] Figure 16 is a schematic structural diagram of a communication device provided in an embodiment of this application. This communication device can be a terminal device or a network device. The communication device 1600 shown in Figure 16 includes a processor 1601, which can call and run computer programs from memory to implement the methods in the embodiments of this application.

[0221] Optionally, as shown in FIG16, the communication device 1600 may further include a memory 1602. The processor 1601 can call and run computer programs from the memory 1602 to implement the methods in the embodiments of this application.

[0222] The memory 1602 can be a separate device independent of the processor 1601, or it can be integrated into the processor 1601.

[0223] Optionally, as shown in FIG16, the communication device 1600 may further include a transceiver 1603, and the processor 1601 may control the transceiver 1603 to communicate with other devices. Specifically, it may send information or data to other devices or receive information or data sent by other devices.

[0224] The transceiver 1603 may include a transmitter and a receiver. The transceiver 1603 may further include an antenna, and the number of antennas may be one or more.

[0225] Optionally, the communication device 1600 may specifically be a network device in the embodiments of this application, and the communication device 1600 may implement the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0226] Optionally, the communication device 1600 may specifically be a terminal device in the embodiments of this application, and the communication device 1600 may implement the corresponding processes implemented by the terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0227] Figure 17 is a schematic structural diagram of a chip provided in an embodiment of this application. The chip 1700 shown in Figure 17 includes a processor 1701, which can call and run computer programs from memory to implement the methods in the embodiments of this application.

[0228] Optionally, as shown in FIG17, chip 1700 may further include memory 1702. Processor 1701 can call and run computer programs from memory 1702 to implement the methods in the embodiments of this application.

[0229] The memory 1702 can be a separate device independent of the processor 1701, or it can be integrated into the processor 1701.

[0230] Optionally, the chip 1700 may also include an input interface 1703. The processor 1701 can control the input interface 1703 to communicate with other devices or chips; specifically, it can acquire information or data sent by other devices or chips.

[0231] Optionally, the chip 1700 may also include an output interface 1704. The processor 1701 can control the output interface 1704 to communicate with other devices or chips, specifically, to output information or data to other devices or chips.

[0232] Optionally, the chip can be applied to the network device in the embodiments of this application, and the chip can implement the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0233] Optionally, the chip can be applied to the terminal device in the embodiments of this application, and the chip can implement the corresponding processes implemented by the terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0234] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0235] This application also provides a computer storage medium that stores one or more programs, which can be executed by one or more processors to implement the methods in this application.

[0236] Figure 18 is a schematic block diagram of a communication system provided in an embodiment of this application. As shown in Figure 18, the communication system 1800 includes a terminal device 1801 and a network device 1802.

[0237] The terminal device 1801 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1802 can be used to implement the corresponding functions implemented by the network device that interacts with the terminal device in the above method. For the sake of brevity, these will not be elaborated here.

[0238] It should be understood that the processor in the embodiments of this application may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor described above can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0239] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0240] It should be understood that the above-described memory is exemplary and not a limiting description. For example, the memory in the embodiments of this application may also be 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 memory bus RAM (DR RAM), etc. That is to say, the memory in the embodiments of this application is intended to include, but is not limited to, these and any other suitable types of memory.

[0241] This application also provides a computer-readable storage medium for storing computer programs.

[0242] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of this application, and the computer program causes the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0243] Optionally, the computer-readable storage medium can be applied to the terminal device in the embodiments of this application, and the computer program causes the computer to execute the corresponding processes implemented by the terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0244] This application also provides a computer program product, including computer program instructions.

[0245] Optionally, the computer program product can be applied to the network device in the embodiments of this application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, they will not be described in detail here.

[0246] Optionally, the computer program product can be applied to the terminal device in the embodiments of this application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the terminal device in the various methods of the embodiments of this application. For the sake of brevity, they will not be described in detail here.

[0247] This application also provides a computer program.

[0248] Optionally, the computer program can be applied to the network device in the embodiments of this application. When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0249] Optionally, the computer program can be applied to the terminal device in the embodiments of this application. When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0250] Those skilled in the art will recognize that the units and algorithm steps of the various examples 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 implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art 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.

[0251] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0252] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0253] The units described as separate components may or may not be physically separate. 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 the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0254] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0255] If the aforementioned functions are implemented as 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 this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0256] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A signal transmission method, the method comprising: The terminal device receives first information, which is used to indicate a first location; The terminal device receives a first signal and / or a first channel at the first location; the first signal and / or the first channel are used by the terminal device to perform cell search.

2. The method according to claim 1, wherein the first information includes frequency domain location information and / or time domain location information; the frequency domain location information is used to determine a first frequency domain location of the first location, and the time domain location information is used to determine a first time domain location of the first location.

3. The method according to claim 2, wherein the frequency domain location information includes one or more of the following: The position index of the first frequency domain location; The first offset value between the first frequency domain position and the second frequency domain position; The second offset value between the first frequency domain position and the reference frequency domain position; The third offset value between the reference frequency domain position and the second frequency domain position.

4. The method according to claim 3, wherein the second frequency domain position is the frequency domain position in which the terminal device receives the second signal and / or the second channel.

5. The method according to claim 3 or 4, wherein one or more of the first offset value, the second offset value and the third offset value are at least one RB or at least one subcarrier corresponding to the first subcarrier interval.

6. The method according to any one of claims 2 to 5, wherein the first frequency domain position is one or more frequency domain positions within the first carrier; the frequency domain position information includes one or more of the following: The carrier identifier of the first carrier; The bandwidth of the first carrier; The frequency domain starting position of the first carrier; The fourth offset value between the frequency domain start position and the second frequency domain position of the first carrier; The fifth offset value between the frequency domain start position of the first carrier and the reference frequency domain position; The sixth offset value between the reference frequency domain position and the second frequency domain position.

7. The method according to claim 6, wherein one or more of the bandwidth of the first carrier, the fourth offset value, the fifth offset value, and the sixth offset value are at least one resource block RB or at least one subcarrier corresponding to the second subcarrier interval.

8. The method according to any one of claims 2 to 7, wherein the first time-domain position is one or more time-domain positions within a first period; the time-domain position information includes one or more of the following: The duration of the first cycle; The time slot index of the first time domain location; The seventh offset value between the first time domain position and the second time domain position; The eighth offset value between the first time domain position and the reference time domain position; The ninth offset value between the reference time domain position and the second time domain position.

9. The method according to claim 8, wherein the second time-domain location is the time-domain location at which the terminal device receives the second signal and / or the second channel.

10. The method according to claim 8 or 9, wherein one or more of the time length, the seventh offset value, the eighth offset value, and the ninth offset value are one or more first time domain units; the first time domain unit is any one of the following: Subframe; millisecond; The time slot or symbol corresponding to the third subcarrier interval.

11. The method according to any one of claims 5, 7, or 10, wherein one or more of the first subcarrier spacing, the second subcarrier spacing, and the third subcarrier spacing are determined according to one or more of the following: Predefined information; The subcarrier spacing of the first signal and / or the first channel; The subcarrier spacing of the second signal and / or the second channel; The first piece of information.

12. The method according to any one of claims 1 to 11, wherein the first frequency domain position is located on a first frequency domain grid, and / or the second frequency domain position is located on a second frequency domain grid.

13. The method according to claim 12, wherein the frequency interval of the first frequency domain grid is smaller than the frequency interval of the second frequency domain grid.

14. The method according to claim 12 or 13, wherein the bandwidth of the first signal and / or the first channel is greater than the bandwidth of the second signal and / or the second channel.

15. The method according to any one of claims 12 to 14, wherein the first information is carried by the second signal and / or the second channel, or the first information is carried by a system message corresponding to the second signal and / or the second channel.

16. The method according to any one of claims 1 to 15, wherein the first signal and / or the second signal is a primary synchronization signal PSS or an auxiliary synchronization signal SSS; and the first channel and / or the second channel is a physical broadcast channel PBCH.

17. A signal transmission method, the method comprising: The network device sends first information, which is used to indicate a first location; The network device transmits a first signal and / or a first channel at the first location; the first signal and / or the first channel is used by the terminal device to perform cell search.

18. A signal transmission device, applied to a terminal device, the device comprising: A first receiving unit is configured to receive first information, the first information being used to indicate a first position; The terminal device receives a first signal and / or a first channel at the first location; the first signal and / or the first channel is used by the terminal device to perform cell search.

19. A signal transmission device applied to a network device, the device comprising: The first transmitting unit is configured to transmit first information, which is used to indicate a first position; At the first location, a first signal and / or a first channel are transmitted; the first signal and / or the first channel are used by the terminal device to perform cell search.

20. A terminal device, comprising: Memory is used to store executable instructions for a computer; A processor, connected to the memory, is configured to implement the method of any one of claims 1 to 16 by executing the computer-executable instructions.

21. A network device, comprising: Memory is used to store executable instructions for a computer; A processor, connected to the memory, is configured to implement the method of claim 17 by executing the computer-executable instructions.

22. A chip, the chip comprising: A processor for retrieving and running a computer program from memory, causing a device having the chip mounted to perform the method as described in any one of claims 1 to 16, or to perform the method as described in claim 17.

23. A computer-readable storage medium storing a computer program that, when executed by at least one processor, implements the method as claimed in any one of claims 1 to 16, or performs the method as claimed in claim 17.

24. A computer program product comprising a computer storage medium storing a computer program, the computer program comprising instructions executable by at least one processor, wherein when the instructions are executed by the at least one processor, the method of any one of claims 1 to 16 is implemented, or the method of claim 17 is performed.

25. A computer program that causes a computer to perform the method as claimed in any one of claims 1 to 16, or to perform the method as claimed in claim 17.

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