Signal sending method and apparatus, signal receiving method and apparatus, device, chip, and storage medium

Abstract

The present application provides a signal sending method and apparatus, a signal receiving method and apparatus, a device, a chip, and a storage medium. The signal sending method comprises: a network device sends a synchronization signal block; and a terminal device receives the synchronization signal block, the bandwidth of at least some signals in the synchronization signal block being less than or equal to a first threshold, and the first threshold being related to subcarrier spacing used by the synchronization signal block.

Description

Signal transmission methods, signal reception methods, devices, equipment, chips and storage media Technical Field

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

[0002] With the development of communication technology, users have increasingly higher requirements for the energy consumption of terminal devices. Currently, the detection of the Synchronization Signal / PBCH Block (SSB) in terminal devices is complex and consumes a lot of power. How to reduce the complexity and power consumption of SSB detection is an urgent technical problem to be solved. Summary of the Invention

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

[0004] The signal receiving method provided in this application includes:

[0005] The terminal device receives a synchronization signal block, wherein the bandwidth of at least a portion of the signals in the synchronization signal block is less than or equal to a first threshold; the first threshold is related to the subcarrier spacing used in the synchronization signal block.

[0006] The signal transmission method provided in this application includes:

[0007] The network device sends a synchronization signal block, wherein the bandwidth of at least a portion of the signals in the synchronization signal block is less than or equal to a first threshold; the first threshold is related to the subcarrier spacing used in the synchronization signal block.

[0008] The signal receiving device provided in this application is applied to a terminal device, and the device includes:

[0009] The first communication unit is configured to receive a synchronization signal block, wherein the bandwidth of at least a portion of the signals in the synchronization signal block is less than or equal to a first threshold; the first threshold is related to the subcarrier spacing used by the synchronization signal block.

[0010] The signal transmitting device provided in this application is applied to network equipment, and the device includes:

[0011] The second communication unit is configured to transmit a synchronization signal block, wherein the bandwidth of at least a portion of the signals in the synchronization signal block is less than or equal to a first threshold; the first threshold is related to the subcarrier spacing used in the synchronization signal block.

[0012] The communication device provided in this application includes a memory, a processor, and a transceiver. The memory stores computer programs, and the processor calls and runs the computer programs stored in the memory to perform the signal transmission or signal reception methods described above in conjunction with the transceiver.

[0013] The chip provided in this application is used to implement the above-described signal transmission method or signal reception method.

[0014] Specifically, the chip includes a processor for calling and running a computer program from a memory, causing a device equipped with the chip to perform the signal transmission method or signal reception method described above.

[0015] The computer-readable storage medium provided in this application stores a computer program that, when executed by at least one processor, implements the above-described signal transmission method or signal reception method.

[0016] The computer program product provided in this application includes a computer program or instructions, which, when executed by a processor, implement the above-described signal transmission method or signal reception method.

[0017] The computer program provided in this application causes a computer to perform the above-described signal transmission method or signal reception method.

[0018] This application provides a signal transmission method and a signal reception method. In this method, a network device transmits a synchronization signal block, and a terminal device receives the synchronization signal block accordingly. At least a portion of the signals in the synchronization signal block have a bandwidth less than or equal to a first threshold; the first threshold is related to the subcarrier spacing used in the synchronization signal. In other words, this application designs a synchronization signal block with a narrower bandwidth, i.e., a synchronization signal block with a bandwidth less than or equal to the first threshold. Thus, a synchronization signal block with a narrower bandwidth can reduce the detection complexity of the terminal device. Simultaneously, reducing the bandwidth of the synchronization signal block increases the synchronization grid, further reducing detection complexity and power consumption. 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 a communication architecture;

[0021] Figure 2 is a schematic diagram of the structure of a synchronization signal block in related technologies;

[0022] Figure 3 is a schematic diagram of a beam scanning technique in related technologies;

[0023] Figure 4 is a schematic diagram of a possible SSB transmission location in related technologies;

[0024] Figure 5 is a flowchart illustrating a signal transmission method and a signal reception method provided in an embodiment of this application;

[0025] Figures 6A to 6C are schematic diagrams of an SSB structure provided in an embodiment of this application;

[0026] Figures 7A and 7B are two schematic diagrams of an SSB structure provided in an embodiment of this application;

[0027] Figures 8A to 8D are three schematic diagrams of an SSB structure provided in an embodiment of this application;

[0028] Figures 9A and 9B are schematic diagrams of an SSB structure provided in an embodiment of this application;

[0029] Figures 10A and 10B are schematic diagrams of an SSB structure provided in an embodiment of this application.

[0030] Figures 11A to 11C are schematic diagrams of an SSB structure provided in an embodiment of this application.

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

[0032] Figures 13A and 13B are schematic diagrams of an SSB structure provided in an embodiment of this application.

[0033] Figures 14A and 14B are schematic diagrams of an SSB structure provided in an embodiment of this application.

[0034] Figures 15A and 15B are schematic diagrams of an SSB structure provided in an embodiment of this application;

[0035] Figures 16A and 16B are schematic diagrams of an SSB structure provided in an embodiment of this application.

[0036] Figures 17A and 17B are twelve schematic diagrams of an SSB structure provided in an embodiment of this application;

[0037] Figure 18 is a schematic diagram of an SSB structure provided in an embodiment of this application.

[0038] Figures 19A and 19B are fourteenth schematic diagrams of an SSB structure provided in an embodiment of this application;

[0039] Figure 20 is a schematic diagram of the structural composition of a signal receiving device 2000 provided in an embodiment of this application;

[0040] Figure 21 is a schematic diagram of the structural composition of a signal transmitting device 2100 provided in an embodiment of this application;

[0041] Figure 22 is a schematic diagram of the structural composition of a communication device provided in an embodiment of this application;

[0042] Figure 23 is a schematic structural diagram of a chip provided in an embodiment of this application;

[0043] Figure 24 is a schematic block diagram of a communication system provided in an embodiment of this application. Detailed Implementation

[0044] 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.

[0045] Figure 1 is a schematic diagram of an application scenario of an embodiment of this application.

[0046] 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.

[0047] 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 NR communication system), or future communication systems, etc.

[0048] In the communication system 100 shown in Figure 1, the network device 120 can be an access network device that communicates with the terminal device 110. The access network device can provide communication coverage for a specific geographical area and can communicate with the terminal device 110 located within that coverage area.

[0049] Network device 120 may be an evolved Node B (eNB or eNodeB) in an LTE system, or a Next Generation Radio Access Network (NG RAN) device, or a base station (gNB) in an NR system, or a radio controller in a Cloud Radio Access Network (CRAN), or network device 120 may be a relay station, access point, vehicle-mounted equipment, wearable device, hub, switch, bridge, router, or network equipment in a future evolved Public Land Mobile Network (PLMN), etc.

[0050] 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.

[0051] For example, terminal equipment 110 can refer to an access terminal, user equipment (UE), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent, or user device. An 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 equipment in a 5G network, or terminal equipment in a future evolved network, etc.

[0052] Terminal device 110 can be used for device-to-device (D2D) communication.

[0053] Figure 1 illustrates an exemplary network device and two terminal devices. Optionally, the communication system 100 may include multiple network devices, and each network device may include other numbers of terminal devices within its coverage area. This application embodiment does not limit this.

[0054] 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.

[0055] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0056] It should be understood that the terms "first, second, third" used in the embodiments of this application are only used to distinguish similar objects and do not represent a specific order of objects. It is understood that "first, second, third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0057] It should also be understood that the term "and / or" in this article is merely a description of 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 article generally indicates that the preceding and following related objects have an "or" relationship.

[0058] It should also be understood that the term "instruction" mentioned in the embodiments of this application can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0059] It should also be understood that the term "correspondence" mentioned in the embodiments of this application may indicate a direct or indirect correspondence between the two, or an association between the two, or a relationship of instruction and being instructed, configuration and being configured, etc.

[0060] 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 it.

[0061] 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.

[0062] In an NR system, the initial access process includes a measurement and system information acquisition phase, and a random access (RA) phase.

[0063] The first step is to introduce the phase of measuring and acquiring system information.

[0064] After powering on, the UE searches for the Synchronization Signal and PBCH Block (SSB) in the network (NW). For the UE, measuring and selecting the optimal SSB serves to obtain downlink time synchronization, determine the uplink transmission beam direction, and decode the Physical Broadcast Channel (PBCH) within the SSB. The PBCH contains the higher-layer Master Information Block (MIB), which in turn contains scheduling information for the Physical Downlink Shared Channel (PDSCH) carrying System Information Block (SIB) 1.

[0065] It should be noted that the UE can scan and measure the SSBs transmitted from the base station to evaluate the signal strength (such as the Reference Signal Receiving Power (RSRP)) in order to select the optimal SSB for access.

[0066] Figure 2 is a schematic diagram of the structure of the synchronization signal block in related technologies. As shown in Figure 2, the SSB includes the Primary Synchronization Signal (PSS), the Secondary Synchronization Signal (SSS), the PBCH, and the PBCH Demodulation Reference Signal (DMRS). The PSS and SSS contain 12 Physical Resource Blocks (PRBs) in the frequency domain, while the PBCH contains 20 PRBs in the frequency domain. The SSB can indicate the cell identity document (ID), support UE time-frequency synchronization, obtain MIB information, assist in cell search, and be used for Radio Resource Management (RRM) and Radio Link Management (RLM) measurements, etc.

[0067] Figure 3 illustrates the SSB transmission principle in a 5G communication system. In 5G, the network employs beam sweeping to meet coverage requirements, essentially trading time for space. Specifically, the base station periodically transmits SSBs in the time domain in the form of SSB burst sets. Each SSB burst set contains multiple SSBs, all concentrated within a 5ms range. Different SSBs may have different beam directions, thus achieving coverage in different directions. As shown in Figure 3, SSB burst sets are transmitted at a 20ms period, with each burst set containing 8 SSBs, corresponding to indices #0 to #7. Different SSBs target different beam directions, ensuring that UEs in different directions can receive SSBs with sufficiently high RSRP. Measurements show that UE1 can choose SSB with index #1 (optimal signal request) for access, while UE2 can choose SSB with index #7 for access.

[0068] It should be noted that the SSB transmission period can vary from 5 milliseconds to 160 milliseconds, for example, it can be {5, 10, 20, 40, 80, 160} ms. This period can be configured via higher-layer signaling. However, for a UE performing initial cell search, it cannot receive higher-layer signaling regarding the SSB burst set transmission period before searching for SSBs. Therefore, a default period needs to be defined. In the NR system, the default period for a UE performing initial cell search is defined as 20 ms. When the relevant higher-layer signaling received by the UE contains SSB burst set period information, the UE can determine the SSB burst set period using this information; otherwise, the UE defaults to a 5 ms period for the SSB burst set of the serving cell.

[0069] It should also be noted that within each SSB burst set period, all SSBs are transmitted within a half-frame (5ms). Within frequency range 1 (FR1), a maximum of four time slots contain SSBs within a half-frame. The Orthogonal Frequency Division Multiplexing (OFDM) symbol for each SSB varies depending on the subcarrier spacing and the transmission capacity of the SSB. For example, referring to Figure 4, which illustrates a possible SSB transmission location, within a half-frame (5ms), an SSB can be transmitted in the first four subframes (1ms). In addition, in each subframe, in the 15kHz subcarrier spacing scheme, the SSB transmission positions include: OFDM symbols 2-5 and OFDM symbols 8-11; in one scheme of 30kHz subcarrier spacing, the SSB transmission positions may include OFDM symbols 4-7 and OFDM symbols 8-11 in the first time slot, and OFDM symbols 2-5 and OFDM symbols 6-9 in the second time slot; in another scheme of 30kHz subcarrier spacing, the SSB transmission positions may include OFDM symbols 2-5 and OFDM symbols 8-11 in each time slot.

[0070] After selecting the best SSB, the UE can decode the PBCH to obtain the MIB. Based on the configuration information in the MIB and the system message transmission method determined in the protocol, the UE blindly detects the scheduling physical downlink control channel (PDCCH) of system messages from the control-resource set (CORESET) #0 and the search space #0. It decodes the PDSCH carrying SIB1 from the PDCCH, thereby obtaining the RACH configuration information in SIB1. Here, CORESET is the set of PDCCH candidate sets on time and frequency resources, while Search Space is the search range of the PDCCH candidate sets within CORESET.

[0071] The RA phase is described below.

[0072] In NR Rel.15, a four-step RACH process was supported; later versions also supported a two-step RACH process (divided into Step A and Step B). This explanation will use the four-step RACH process as an example.

[0073] (1) Transmission of random access preamble (Preamble as Msg.1). The UE selects a random access preamble and transmits it to the base station's transmission point (TRP) on the PRACH. The PRACH preamble sequence consists of a root sequence and its cyclic shift. The PRACH preamble defines the specific format of the PRACH preamble, including time-domain resources and frequency-domain resources.

[0074] (2) Random Access Response (RAR) (RAR as Msg.2). After receiving the preamble, the base station sends a RAR to the UE, which includes Timing Advance (TA), Uplink Resource Grant (UL grant), and Cell-Radio Network Temporary Identifier (C-RNTI). The UE listens to the PDCCH to receive the RAR. If the UE successfully receives a RAR and the preamble sequence in the RAR is the same as the preamble sequence sent by the UE, it is considered that the RAR has been successfully received, uplink resources have been obtained, and uplink data can be sent.

[0075] (3) RRC Connection Request (Msg.3). The UE sends an RRC Setup Request message using the uplink resources allocated in the RAR. This message contains the UE identifier and the reason for establishment. This step is part of the contention-based random access procedure.

[0076] (4) RRC Connection Device (Msg.4). After receiving the RRC connection request, the base station sends an RRC connection setup message to confirm the connection request and allocate the necessary resources. This message is used to resolve possible contention-based preamble sequence conflicts and marks the completion of the initial access procedure.

[0077] In 5G communication systems, the minimum bandwidth of a Subcarrier Signal Block (SSB) is 3.6MHz when the subcarrier spacing is 15kHz and 7.2MHz when the subcarrier spacing is 30kHz. Terminal devices need to support at least this bandwidth to detect SSBs. Additionally, the synchronization grid is relatively small during cell search, all of which contribute to the high complexity and power consumption of SSB detection.

[0078] Based on this, embodiments of this application provide a signal transmission method and a signal reception method, wherein a network device transmits a synchronization signal block, and a terminal device receives the synchronization signal block accordingly, wherein at least a portion of the signals in the synchronization signal block have a bandwidth less than or equal to a first threshold; the first threshold is related to the subcarrier spacing used in the synchronization signal. In other words, embodiments of this application design a synchronization signal block with narrower bandwidth, i.e., a synchronization signal block with a bandwidth less than or equal to the first threshold. Thus, a synchronization signal block with narrower bandwidth can reduce the detection complexity of the terminal device. Simultaneously, reducing the bandwidth of the synchronization signal block increases the synchronization grid, further reducing detection complexity and power consumption.

[0079] 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.

[0080] It should be noted that the synchronization signal block mentioned in the embodiments of this application can be understood as the Synchronization Signal / PBCH Block (SSB).

[0081] It should also be noted that the time-domain symbols mentioned in the embodiments of this application can be OFDM symbols or Single-carrier Frequency-Division Multiple Access (SC-FDMA) symbols, and the embodiments of this application do not limit them.

[0082] It should be noted that the “time domain symbol occupied by PSS” mentioned in the embodiments of this application can be equivalently replaced with “PSS symbol”, “time domain symbol where PSS is located”, “time domain symbol of PSS”, “OFDM symbol where PSS is located”, and “OFDM symbol of PSS”.

[0083] It should be noted that the “time domain symbol occupied by SSS” mentioned in the embodiments of this application can be equivalently replaced with “SSS symbol”, “time domain symbol where SSS is located”, “time domain symbol of SSS”, “OFDM symbol where SSS is located”, and “OFDM symbol of SSS”.

[0084] It should be noted that the "time domain symbol occupied by the MIB" mentioned in the embodiments of this application can be equivalently replaced with "MIB symbol", "time domain symbol where the MIB is located", "time domain symbol of the MIB", "OFDM symbol where the MIB is located", and "OFDM symbol of the MIB".

[0085] It should also be noted that the “number of subcarriers” mentioned in the embodiments of this application can also be called the “number of resource elements (REs)”, and the two are equivalent or interchangeable.

[0086] It should also be noted that the signal transmission method provided in this application embodiment is used for network devices, and the signal reception method provided in this application embodiment is used for terminal devices.

[0087] Figure 5 is a flowchart illustrating a signal transmission / reception method provided in an embodiment of this application. As shown in Figure 5, the method may include:

[0088] S510, the network device sends an SSB, and the corresponding terminal device receives the SSB. At least a portion of the signal in the SSB has a bandwidth less than or equal to a first threshold; the first threshold is related to the subcarrier spacing used in the synchronization signal.

[0089] This application embodiment designs an SSB in which the bandwidth of at least a portion of the signal can be less than a first threshold.

[0090] It should be noted that at least some of the signals in the SSB have a bandwidth less than the first threshold. This can be understood as the bandwidth of one or more of the PSS, SSS, and MIB of the SSB being less than the first threshold.

[0091] In some embodiments, the bandwidth of the entire SSB signal is less than a first threshold. That is, the PSS, SSS, and MIB of the SSB are all less than the first threshold.

[0092] In some embodiments, the bandwidth of a portion of the SSB signal is less than a first threshold. For example, the bandwidth of the SSB's PSS is less than the first threshold, or the bandwidth of the SSS is less than the first threshold, or both the PSS and SSS bandwidths are less than the first threshold. This application embodiment does not limit the specific signal of the SSB.

[0093] In this embodiment of the application, the first threshold may be related to the subcarrier spacing used by the synchronization signal block.

[0094] In some embodiments, when the subcarrier spacing used by the SSB is 30 kHz, the first threshold can be any one of 6 MHz, 5 MHz, or 3 MHz.

[0095] In some embodiments, when the subcarrier spacing used by the SSB is 15 kHz, the first threshold can be 3 MHz or 2 MHz.

[0096] It should be noted that the SSB can also use subcarrier spacing of 60kHz, 120kHz, and 240kHz. Correspondingly, when the SSB uses a 60kHz subcarrier spacing, the first threshold can be 14MHz; when the SSB uses a 120kHz subcarrier spacing, the first threshold can be 28MHz; and when the SSB uses a 240kHz subcarrier spacing, the first threshold can be 56MHz.

[0097] The method provided in this application embodiment allows network devices to send SSBs with narrower bandwidth, and correspondingly, terminal devices can receive SSBs with narrower bandwidth. This reduces the detection complexity of the terminal devices. At the same time, reducing the bandwidth of the SSB increases the synchronization grid, further reducing detection complexity and power consumption.

[0098] It should be noted that the bandwidth of an SSB is related to the number of PRBs it occupies and the subcarrier spacing used by the SSB. Specifically, the bandwidth of an SSB = number of PRBs occupied by the SSB * 12 * subcarrier spacing. Here, 12 refers to the fact that each PRB contains 12 subcarriers.

[0099] In one embodiment of this application, the bandwidth of at least a portion of the signals in the SSB is less than the first threshold. It can also be expressed as: the number of PRBs occupied by at least a portion of the signals in the SSB (denoted as N in this embodiment) is less than or equal to the second threshold, or the number of PRBs N occupied by at least a portion of the signals in the SSB does not exceed the second threshold.

[0100] It should also be noted that N is related to the first threshold and / or the subcarrier spacing, or in other words, the second threshold is related to the first threshold and / or the subcarrier spacing.

[0101] In some embodiments, the second threshold and the first threshold, as well as the subcarrier spacing used by the SSB, are converted into a certain value; or, the second threshold can be calculated from the first threshold and the subcarrier spacing.

[0102] For example, the second threshold = floor(first threshold / subcarrier spacing / 12); where floor(*) represents rounding down from *.

[0103] In some embodiments, the second threshold is mapped to the first threshold and the subcarrier spacing.

[0104] For example, the mapping relationship may include one or more of the following a) to e).

[0105] a) When the subcarrier spacing used by the SSB is 30kHz and the first threshold is 6MHz, N is less than or equal to 15 (the second threshold is 15).

[0106] It should be understood that when the subcarrier spacing of the SSB is 30kHz and the first threshold is 6MHz, the number of PRBs N occupied by at least some signals in the SSB is less than or equal to 15.

[0107] Where N is a specific value. N can be a fixed parameter predefined by the protocol.

[0108] Optionally, in this embodiment, N can be equal to 15, 14, 13, etc., depending on the different spectral efficiencies. This application does not limit this.

[0109] For example, referring to Figures 6A-6C, 7A-7B, and 8A-8D, when the subcarrier spacing used by the SSB is 30kHz and the first threshold is 6MHz, the number N of PRBs occupied by the PSS, SSS, and MIB is 15 (corresponding to 180 subcarriers).

[0110] b): When the subcarrier spacing used by the SSB is 30kHz and the first threshold is 5MHz, N is less than or equal to 13 (the second threshold is 13).

[0111] It should be understood that when the subcarrier spacing used by the SSB is 30kHz and the first threshold is 5MHz, the number N of PRBs occupied by at least some signals in the SSB is less than or equal to 13.

[0112] Where N is a specific value. N can be a fixed parameter predefined by the protocol.

[0113] Optionally, in this embodiment, N can be equal to 13, 12, etc., depending on the different spectral efficiencies. This application does not limit this.

[0114] For example, referring to the SSB structure shown in Figures 9A and 9B, when the subcarrier spacing used by the SSB is 30kHz and the first threshold is 5MHz, the number N of PRBs occupied by the PSS, SSS and MIB is 12 (corresponding to 144 subcarriers).

[0115] c): When the subcarrier spacing used by the SSB is 30kHz and the first threshold is 3MHz, N is less than or equal to 8 (the second threshold is 8).

[0116] It should be understood that when the subcarrier spacing used by the SSB is 30kHz and the first threshold is 3MHz, the number N of PRBs occupied by at least some signals in the SSB is less than or equal to 8.

[0117] Where N is a specific value. N can be a fixed parameter predefined by the protocol.

[0118] Optionally, in this embodiment, N can be equal to 8, 7, 6, etc., depending on the different spectral efficiencies. This application does not limit this.

[0119] For example, referring to the SSB structure shown in Figures 10A and 10B, Figures 11A to 11C, and Figure 12, when the subcarrier spacing used by the SSB is 30kHz and the first threshold is 3MHz, the number N of PRBs occupied by the PSS, SSS, and MIB is 8 (corresponding to 96 subcarriers).

[0120] For example, referring to the SSB structure shown in Figures 13A and 13B, 14A and 14B, and 15A and 15B, when the subcarrier spacing used by the SSB is 30kHz and the first threshold is 3MHz, the number N of PRBs occupied by the PSS, SSS and MIB is 7 (corresponding to 84 subcarriers).

[0121] d): When the subcarrier spacing used by the SSB is 15kHz and the first threshold is 3MHz, N is less than or equal to 15 (the second threshold is 15).

[0122] It should be understood that when the subcarrier spacing of the SSB is 15kHz and the first threshold is 3MHz, the number N of PRBs occupied by at least some signals in the SSB is less than or equal to 15.

[0123] Where N is a specific value. N can be a fixed parameter predefined by the protocol.

[0124] Optionally, in this embodiment, N can be equal to 15, 14, 13, 12, etc., depending on the different spectral efficiencies. This application does not limit this.

[0125] For example, referring to the SSB structure shown in Figures 6A-6C, 7A-7B, and 8A-8D, when the subcarrier spacing used by the SSB is 15kHz and the first threshold is 3MHz, the number N of PRBs occupied by the PSS, SSS, and MIB is 15 (corresponding to 180 subcarriers).

[0126] For example, referring to the SSB structure shown in Figures 9A and 9B, when the subcarrier spacing used by the SSB is 15kHz and the first threshold is 3MHz, the number N of PRBs occupied by the PSS, SSS and MIB is 12 (corresponding to 144 subcarriers).

[0127] e): When the subcarrier spacing used by the SSB is 15kHz and the first threshold is 2MHz, N is less than or equal to 11 (the second threshold is 11).

[0128] It should be understood that when the subcarrier spacing used by the SSB is 15kHz and the first threshold is 2MHz, the number N of PRBs occupied by at least some signals in the SSB is less than or equal to 11.

[0129] Where N is a specific value. N can be a fixed parameter predefined by the protocol.

[0130] Optionally, in this embodiment, N can be equal to 11, 10, 9, etc., depending on the different spectral efficiencies. This application does not limit this.

[0131] For example, referring to the SSB structure shown in Figures 16A and 16B, when the subcarrier spacing used by the SSB is 15kHz and the first threshold is 2MHz, the number N of PRBs occupied by the PSS, SSS and MIB is 11 (corresponding to 132 subcarriers).

[0132] For example, referring to the SSB structure shown in Figures 17A and 17B, when the subcarrier spacing used by the SSB is 15kHz and the first threshold is 2MHz, the number N of PRBs occupied by the PSS, SSS and MIB is 10 (corresponding to 120 subcarriers).

[0133] The method provided in this application embodiment allows network devices to transmit SSBs with narrower bandwidths for different subcarrier intervals. Correspondingly, terminal devices can receive SSBs with narrower bandwidths. This reduces the detection complexity of the terminal devices. At the same time, reducing the bandwidth of the SSB increases the synchronization grid, further reducing detection complexity and power consumption.

[0134] It should be noted that, in the embodiments of this application, the information contained in at least some of the signals in step S510 can be implemented in different ways. In one possible implementation (denoted as implementation #A), at least some of the signals may include all the signals in SSB. In another possible implementation (denoted as implementation #B), at least some of the signals may include PSS and SSS. In yet another possible implementation (denoted as implementation #C), at least some of the signals may include only PSS. In yet another possible implementation (denoted as implementation #D), at least some of the signals may include only SSS.

[0135] The following sections will introduce methods #A through #D.

[0136] Option #A: At least some of the signals in step S510 include all the signals in the SSB. That is, the bandwidth of all signals in the SSB is less than the first threshold. Specifically, the bandwidths of the PSS, SSS, and MIB in the SSB are all less than the first threshold.

[0137] In method #A, the number of PRBs occupied by PSS, SSS and MIB in SSB is N, where N is less than or equal to the second threshold.

[0138] It should be noted that the relevant content of the first threshold and the second threshold can be referred to the description in the above embodiments, and will not be repeated here for the sake of brevity.

[0139] It should be noted that the N PRBs occupied by the PSS can include the subcarriers occupied by the PSS, as well as the guard intervals on both sides of the PSS frequency domain. The N PRBs occupied by the SSS include the subcarriers occupied by the SSS, as well as the guard intervals on both sides of the SSS frequency domain.

[0140] The guard interval on the first side of the PSS frequency domain can include K1 subcarriers, and the guard interval on the second side of the PSS frequency domain can include K2 subcarriers. The first side can be located on the side with higher index subcarriers in the frequency domain, and the second side can be located on the side with lower index subcarriers in the frequency domain. If the number of subcarriers occupied by the PSS is denoted as K3, then N = (K3 + K1 + K2) / 12.

[0141] It should be noted that K1 and K2 are both integers greater than or equal to 1. The values ​​of K1 and K2 can be the same or different, and this application embodiment does not impose any restrictions on this.

[0142] The guard interval on the first side of the SSS frequency domain can include L1 subcarriers, and the guard interval on the second side of the SSS frequency domain can include L2 subcarriers. The first side can be located on the side with higher index subcarriers in the frequency domain, and the second side can be located on the side with lower index subcarriers in the frequency domain. If the number of subcarriers occupied by the SSS is denoted as L3, then N = (L3 + L1 + L2) / 12.

[0143] It should be noted that L1 and L2 are both integers greater than or equal to 1. The values ​​of L1 and L2 can be the same or different, and this application embodiment does not impose any restrictions on this.

[0144] In some embodiments, the number of subcarriers K3 occupied by the PSS and / or the number of subcarriers L3 occupied by the SSS can be specific values.

[0145] It should be noted that, in the embodiments of this application, the number of subcarriers occupied by the PSS can also be referred to as the length of the PSS, and the two are equivalent or interchangeable. The number of subcarriers occupied by the SSS can also be referred to as the length of the SSS, and the two are equivalent or interchangeable.

[0146] In some embodiments, the number of subcarriers K3 occupied by the PSS and / or the number of subcarriers L3 occupied by the SSS are any of the parameters in the first parameter set.

[0147] It should be noted that the parameters included in the first parameter set can be continuous or discrete, and this application embodiment does not impose any restrictions on this.

[0148] In some embodiments, to ensure good correlation between different PSS and SSS, the parameters in the first parameter set can be prime numbers. That is, the number of subcarriers occupied by the PSS and SSS is a prime number. For example, the first parameter set is {61,67,71,73,79,83,89,97,101,103,107,109,113,127,…}.

[0149] For example, in the SSB structures shown in Figures 6A-6C, 7A-7B, and 8A-8D, the number N of PRBs occupied by PSS, SSS, and MIB is 15 (corresponding to 180 subcarriers). In this scenario, the number of subcarriers occupied by PSS and SSS can be 127.

[0150] For example, in the SSB structure shown in Figures 9A and 9B, the number N of PRBs occupied by PSS, SSS and MIB is 12 (corresponding to 144 subcarriers). In this scenario, the length of PSS and SSS can be 127 REs.

[0151] For example, in the SSB structure shown in Figures 10A and 10B, and Figures 11A to 11C, the number N of PRBs occupied by PSS, SSS and MIB is 8 (corresponding to 96 subcarriers). In this case, the length of PSS and SSS can be 79 REs.

[0152] For example, in the SSB structure shown in Figures 13A and 13B, the number N of PRBs occupied by PSS, SSS and MIB is 7 (corresponding to 84 subcarriers). In this case, the length of PSS and SSS can be 67 REs.

[0153] For example, in the SSB structure shown in Figures 16A and 16B, the number N of PRBs occupied by PSS, SSS and MIB is 11 (corresponding to 132 subcarriers). In this case, the length of PSS and SSS can be 127 subcarriers.

[0154] For example, in the SSB structure shown in Figures 17A and 17B, the number N of PRBs occupied by PSS, SSS and MIB is 10 (corresponding to 120 subcarriers). In this case, the length of PSS and SSS can be 113 REs.

[0155] It should be noted that the number of subcarriers K3 occupied by PSS can be the same as or different from the number of subcarriers L3 occupied by SSS.

[0156] In some embodiments, the number of subcarriers occupied by the PSS is greater than or equal to the number of subcarriers occupied by the SSS, or in other words, the length of the PSS is greater than or equal to the length of the SSS.

[0157] It should be understood that because PSS is more difficult to detect, the length of PSS can be greater than the length of SSS.

[0158] For example, in the SSB structure shown in Figure 12, the length of the PSS can be 79 REs, and the length of the SSS can be 61 REs.

[0159] For example, in the SSB structure shown in Figures 15A and 15B, the number N of PRBs occupied by PSS, SSS and MIB is 7 (corresponding to 84 subcarriers). In this case, the length of PSS can be 67 REs and the length of SSS can be 62 REs.

[0160] In some embodiments, the PSS can occupy one or more time-domain symbols. For example, the PSS can occupy one time-domain symbol.

[0161] It should be noted that, in the embodiments of this application, the time domain symbol occupied by PSS can also be called the PSS symbol, and the two are equivalent or interchangeable.

[0162] In some embodiments, the SSS can occupy one or more time-domain symbols. For example, the SSS can occupy one or two time-domain symbols.

[0163] It should be noted that, in the embodiments of this application, the time domain symbol occupied by SSS can also be called the SSS symbol, and the two are equivalent or interchangeable.

[0164] It should be understood that an SSS occupying two or more time-domain symbols can indicate more cell IDs.

[0165] It should be noted that when the SSS occupies two time-domain symbols, the number of subcarriers occupied by the SSS, or in other words, the length of the SSS, can be 62. This allows it to match the existing SSB length and carry complete cell ID information.

[0166] For example, in the SSB structure shown in Figures 14A and 14B, the number N of PRBs occupied by PSS, SSS and MIB is 7 (corresponding to 84 subcarriers). In this case, the length of PSS and SSS can be 62 subcarriers.

[0167] In some embodiments, the MIB can occupy multiple time-domain symbols. That is, the PBCH carrying the MIB can occupy multiple time-domain symbols. Understandably, using different numbers of time-domain symbols for the MIB can achieve a good balance between MIB coverage and resource overhead.

[0168] It should be noted that, in the embodiments of this application, the time-domain symbol occupied by the MIB can also be called the MIB symbol, and the two are equivalent or interchangeable.

[0169] In some embodiments, the MIB is frequency-division multiplexed with the SSS on one or more time-domain symbols occupied by the SSS. Alternatively, the MIB may not be used for transmission on one or more time-domain symbols occupied by the SSS.

[0170] It should be noted that in scenarios where the MIB and SSS are frequency-division multiplexed on one or more time-domain symbols occupied by the SSS, the MIB can reuse the PRB with the high subcarrier index, for example, as shown in the SSB structure in Figure 8A. The MIB can also reuse the PRB with the low subcarrier index, for example, as shown in the SSB structure in Figure 8D. The MIB can reuse both the high and low subcarrier index PRBs simultaneously. See Figures 8B and 8C for examples of the SSB structures.

[0171] The following describes the positional relationship between the time domain symbols occupied by PSS, the time domain symbols occupied by SSS, and the symbols occupied by MIB.

[0172] It should be understood that the time domain symbol occupied by PSS (i.e., the PSS symbol) can be located before the time domain symbol occupied by SSS (i.e., the SSS symbol) and the time domain symbol occupied by MIB (i.e., the MIB symbol).

[0173] It should also be understood that a certain number of time-domain symbols can be spaced between PSS and SSS symbols to improve frequency synchronization accuracy. For example, there can be a one-time-domain symbol interval between PSS and SSS symbols. The time-domain symbols between PSS and SSS symbols can be used to transmit a portion of the MIB content.

[0174] In some embodiments (referred to as scenario 1 in this application), the multiple time-domain symbols occupied by the MIB are located after one or more time-domain symbols occupied by the SSS.

[0175] For example, referring to the SSB structures shown in Figures 10B, 11B, 11C, 13B, 14B, and 15B, the time-domain symbols occupied by the MIB are all located after one or more time-domain symbols occupied by the SSS.

[0176] It should be noted that when an SSS occupies multiple time domain symbols, or when there are multiple SSS symbols, since the non-first SSS symbols among the multiple SSS symbols can be spaced a certain distance from the PSS symbols, frequency synchronization accuracy can be guaranteed. In this case, all time domain symbols occupied by the MIB can be after the SSS symbols.

[0177] In some embodiments (referred to as scenario 2 in this application embodiment), at least one time-domain symbol among the multiple time-domain symbols occupied by the MIB is located between one or more time-domain symbols occupied by the PSS and one or more time-domain symbols occupied by the SSS; the remaining time-domain symbols among the multiple time-domain symbols occupied by the MIB are located after one or more time-domain symbols occupied by the SSS.

[0178] In other words, one MIB symbol is located between the PSS and SSS symbols, thus ensuring a certain interval between the PSS and SSS, which helps to improve frequency synchronization accuracy.

[0179] For example, referring to the SSB structure shown in Figures 6A to 6C, 7A and 7B, 8A to 8D, 9A and 9B, 10A, 11A, 13A, 14A, and 15A, one of the MIB symbols is located between the PSS symbol and the SSS symbol.

[0180] In some embodiments, among the multiple time-domain symbols occupied by the MIB, the multiple time-domain symbols following the time-domain symbols occupied by the SSS are consecutive in the time domain. Alternatively, among the multiple time-domain symbols occupied by the MIB following the time-domain symbols occupied by the SSS, the first part of the time-domain symbols and the second part of the time-domain symbols are spaced apart by a first number of time-domain symbols.

[0181] It should be noted that this embodiment can be applied to both scenario 1 and scenario 2 described above. That is, all MIB symbols are located after the SSS symbols, or some of the MIB symbols are located after the SSS symbols. The MIB symbols following the SSS symbols can be continuous or discontinuous.

[0182] It should also be noted that the first quantity can be a parameter predefined by the protocol. For example, the first quantity can be 2.

[0183] For example, referring to the SSB structure shown in Figures 6A, 7A, 8A-8D, 9A, 10A and 10B, 13A and 13B, 14A and 14B, 15A and 15B, 16A, and 17A, the MIB symbol following the SSS symbol is continuous in the time domain.

[0184] For example, referring to the SSB structure shown in Figures 6C, 7B, 9B, 11B, 12, 16B, and 17B, the MIB symbol following the SSS symbol is discontinuous in the time domain.

[0185] It should be understood that the continuous symbol distribution of the MIB symbols following the SSS symbols helps to reduce the duration of the MIB and can reduce the power consumption of the terminal device in detecting the MIB.

[0186] It should also be understood that the MIB symbols following the SSS symbols adopt a discontinuous symbol distribution, which is beneficial for achieving coexistence with other systems (such as LTE or NR).

[0187] For example, in LTE, the Cell-Specific Reference Signal (CRS) needs to be continuously transmitted and occupies two time-domain symbols. A two-time-domain interval can be placed between the MIB symbols following the SSS symbol to transmit the CRS in LTE, thereby ensuring the coexistence of the current system and the LTE system.

[0188] It should be noted that the terminal device can determine whether the MIB symbols following the SSS symbol are continuous based on the frequency band. For example, in frequency bands n5 and n66, since there may be LTE systems on them, the terminal device considers the MIB symbols following the SSS symbol to be discontinuous. On other frequency bands of FR1, the terminal device considers the MIB symbols following the SSS symbol to be continuous.

[0189] In some embodiments, among the multiple time-domain symbols occupied by the MIB, the multiple time-domain symbols following the time-domain symbols occupied by the SSS are time-domain consecutive with one or more time-domain symbols occupied by the SSS; or, among the multiple time-domain symbols occupied by the MIB, the multiple time-domain symbols following the time-domain symbols occupied by the SSS are time-domain separated from one or more time-domain symbols occupied by the SSS by a second number of time-domain symbols.

[0190] It should be noted that the second quantity can be a parameter predefined in the protocol. The second quantity can be the same as or different from the first quantity, and this application embodiment does not impose any restrictions on this. For example, the second quantity can be 2.

[0191] It should also be noted that this embodiment can also be applied to scenarios 1 and 2 above, that is, all MIB symbols are located after the SSS symbols, or some of the MIB symbols are located after the SSS symbols. The MIB symbols located after the SSS symbols can be continuous with the SSS symbols or discontinuous with the SSS symbols.

[0192] For example, referring to Figures 6B, 11A, and 11C, the multiple time-domain symbols occupied by the SSB and MIB that follow the time-domain symbols occupied by the SSS are not discontinuous in the time domain with one or more time-domain symbols occupied by the SSS.

[0193] It should be understood that the MIB symbol following the SSS symbol is consecutive with the SSS symbol, which helps to reduce the duration of the SSB and can reduce the power consumption of the terminal device in detecting the SSB.

[0194] It should also be understood that the MIB symbol, which follows the SSS symbol, is separated from the SSS symbol by a second number of time-domain symbols, which is beneficial for achieving coexistence with other systems (such as LTE or NR).

[0195] For example, in LTE, the Cell-Specific Reference Signal (CRS) needs to be continuously transmitted and occupies two time-domain symbols. A two-time-domain interval can be placed between the MIB symbols following the SSS symbol to transmit the CRS in LTE, thereby ensuring the coexistence of the current system and the LTE system.

[0196] It should be noted that the terminal device can determine whether the MIB symbols following the SSS symbol are continuous based on the frequency band. For example, in frequency bands n5 and n66, since there may be LTE systems on them, the terminal device considers the MIB symbols following the SSS symbol to be discontinuous. On other frequency bands of FR1, the terminal device considers the MIB symbols following the SSS symbol to be continuous.

[0197] By using method #A, network devices can send SSBs with narrower bandwidth, and correspondingly, terminal devices can receive SSBs with narrower bandwidth. This reduces the detection complexity of terminal devices. At the same time, reducing the bandwidth of the SSB increases the synchronization grid, further reducing detection complexity and power consumption.

[0198] Option #B: At least some of the signals in step S510 include PSS and SSS. That is, the bandwidth of both PSS and SSS in SSB is less than the first threshold, or the number N of PRBs occupied by PSS and SSS in SSB is less than or equal to the second threshold. The bandwidth of other signals in SSB, such as the bandwidth of MIB, is not limited.

[0199] It should be noted that in method #B, the relevant descriptions of PSS and SSS, such as the number of subcarriers occupied by PSS and SSS (or the length of PSS and SSS), the time domain symbols occupied by PSS and SSS, and the distribution of PSS symbols and SSS symbols, can be referred to the description in method #A. For the sake of brevity, they will not be repeated here.

[0200] In mode #B, the bandwidth of the MIB in the SSB is greater than the first threshold. That is, the number of subcarriers N occupied by the MIB in the SSB is greater than or equal to the second threshold.

[0201] In some embodiments, the MIB in the SSB includes a first MIB and a second MIB. Alternatively, the MIB in the SSB can be divided into two parts, with the first MIB referred to as the first part of the MIB and the second MIB referred to as the second part of the MIB.

[0202] It should be noted that the first MIB and the second MIB can be decoded independently. That is, after receiving the first MIB, the terminal device can independently retrieve the information carried in the first MIB; the decoding of the first MIB is unrelated to the second MIB. Similarly, after receiving the second MIB, the terminal device can independently retrieve the information carried in the second MIB; the decoding of the second MIB is unrelated to the first MIB.

[0203] In some embodiments, the information carried by the first MIB and the information carried by the second MIB are the same. For example, both the first MIB and the second MIB carry complete master system information.

[0204] In some embodiments, the information carried by the first MIB and the information carried by the second MIB may also be different. For example, the first MIB may carry a portion of the main system information, while the second MIB may carry the remaining content of the main system information.

[0205] In this embodiment of the application, in the frequency domain, the first MIB occupies the same N PRBs as the PSS and / or SSS; the PRBs occupied by the second MIB are located in other PRBs outside of these N PRBs. In the time domain, both the first MIB and the second MIB can occupy multiple time-domain symbols.

[0206] In some embodiments, at least one time-domain symbol among the plurality of time-domain symbols occupied by the first MIB is located between one or more time-domain symbols occupied by the PSS and one or more time-domain symbols occupied by the SSS, and the remaining time-domain symbols among the plurality of time-domain symbols occupied by the first MIB are located after one or more time-domain symbols occupied by the SSS.

[0207] Understandably, placing one symbol in the first MIB symbol between the PSS and SSS symbols ensures a certain interval between them, which helps improve frequency synchronization accuracy.

[0208] For example, refer to the structural diagram of an SSB shown in Figure 18. The first time-domain symbol occupied by the first MIB is located between the PSS symbol and the SSS symbol, and the second time-domain symbol occupied by the first MIB is located after the SSS symbol.

[0209] In some embodiments, the multiple time-domain symbols occupied by the first MIB are all located after one or more time-domain symbols occupied by the SSS.

[0210] It can also be understood that when an SSS occupies multiple time domain symbols, or when there are multiple SSS symbols, since the non-first SSS symbols among the multiple SSS symbols can be spaced a certain distance from the PSS symbols, frequency synchronization accuracy can be guaranteed. In this case, all time domain symbols occupied by the MIB can be after the SSS symbols.

[0211] In some embodiments, the second MIB is frequency-division multiplexed with one or more of the PSS, SSS, and first MIB.

[0212] Understandably, the second MIB can occupy other PRBs besides the N PRBs. The other PRBs occupied by the second MIB can include one or more of the following: PRBs in the PSS symbol other than the N PRBs occupied by the PSS, PRBs in the SSS symbol other than the N PRBs occupied by the SSS, and PRBs in the first MIB symbol other than the N PRBs occupied by the first MIB.

[0213] It should be noted that other PRBs can be located on the side of the low subcarrier index of the PRB occupied by the PSS / SSS / first MIB, or on the side of the high subcarrier index of the PSS / SSS / first MIB. Alternatively, the PRBs of the second MIB can exist in both the low and high subcarrier indices of the PSS / SSS / first MIB. This application does not impose any restrictions on this.

[0214] For example, refer to the schematic diagram of an SSB structure shown in Figure 18. The second MIB can be frequency-division multiplexed with the first MIB and the SSS. The second MIB can occupy the PRBs on both sides of the frequency domain of the first MIB and the SSS.

[0215] It should be noted that, in mode #B, when the network device sends an SSB, the first MIB in the SSB is used by the terminal device with the first capability to obtain the information carried in the MIB; the first MIB and the second MIB are used by the terminal device with the second capability to obtain the information carried in the MIB; wherein, the second capability is greater than the first capability.

[0216] In other words, when the terminal device transmits and receives data based on the first capability, the terminal device can obtain the information carried in the MIB based on the first MIB; when the terminal device transmits and receives data based on the second capability, the terminal device obtains the information carried in the MIB based on both the first and second MIBs; the second capability is greater than the first capability.

[0217] It should be understood that different terminal device capabilities can be defined to better reduce the power consumption of terminal devices. Under different circumstances, terminal devices can use different capabilities for sending and receiving data. Furthermore, the maximum bandwidth that a terminal device can receive may differ depending on its capabilities.

[0218] In the first scenario, the terminal device can use a first capability to send and receive data. Specifically, the terminal device can receive or send signals through a first set of UE functions / capabilities, or the terminal device can receive / send a first set of signals, or the terminal device can receive / send signals within a first set of resources, or the terminal device can receive / send signals through a small function core.

[0219] In the second scenario, the terminal device can use the second capability to send and receive data.

[0220] In one implementation, based on the first case, the terminal device can also receive or send signals through a second set of UE functions / capabilities, or the UE can receive / send a second set of signals, or the UE can receive / send signals within a second set of resources, or the UE can receive / send signals through a large functional core.

[0221] In another implementation, based on the first case, the terminal device receives or transmits signals through capabilities / functions beyond the first UE function / capability set, or the UE receives / transmits signals outside the first signal set, or the UE receives / transmits signals within resources outside the first resource set.

[0222] It should be noted that at least one function / capability in the second UE function / capability set is different from that in the first UE function / capability set, such as maximum receive or transmit bandwidth; the time-frequency resources occupied by the second signal set, or the time-frequency resources contained in the second resource set are different from those in the first signal / resource set.

[0223] It should be noted that the same terminal device can switch between the first UE function / capability set and the second UE function / capability set, or only support the first UE function / capability set; the same UE can receive / transmit different signal sets at different times, or only receive / transmit the first signal set; the same UE can receive / transmit signals in different resource sets at different times, or only receive / transmit signals in the first resource set.

[0224] It should also be noted that the UE function / capability set includes the UE's receive bandwidth, transmit bandwidth, receive antenna, transmit antenna, number of receive ports, number of transmit ports, number of transmit layers, maximum supported MCS, maximum data rate, etc.

[0225] In the two scenarios described above, the maximum bandwidth that the terminal device can receive differs. The method provided in this application embodiment can simultaneously satisfy the SSB (Side Buffer Shift) of terminal devices with different bandwidth receiving capabilities.

[0226] In other words, in this embodiment of the application, in the first scenario described above (i.e., the terminal device transmits and receives data via the first capability), the terminal device only receives the first MIB and obtains all the information carried in the MIB through the first MIB. Therefore, the terminal device can obtain the information required for accessing the cell after receiving the first MIB.

[0227] In the second scenario, the terminal device can receive both the first and second MIBs to obtain the information required for cell access, thereby improving the MIB decoding success rate. It should be noted that when the first and second MIBs carry the same information, the gain from receiving both the first and second MIBs is greater than the gain from receiving the first MIB.

[0228] In some embodiments, the cyclic redundancy version of the first MIB is different from the cyclic tolerance redundancy version of the second MIB.

[0229] For example, the first MIB can be obtained by performing cyclic redundancy check on the MIB using a first cyclic redundancy check version (or a first cyclic redundancy check code). The second MIB can be obtained by performing cyclic redundancy check on the MIB using a second cyclic redundancy check version (or a second cyclic redundancy check code).

[0230] Referring to Figure 18, a schematic diagram of an SSB structure is shown. The first MIB can be obtained based on the first cyclic redundancy version RV0, and the second MIB can be obtained based on the second cyclic redundancy version RV1.

[0231] It should be noted that a network device can send multiple SSBs. In other words, the number of SSBs can be multiple.

[0232] For method #B, the cyclic redundancy version of the first MIB in the first SSB is the same as the cyclic redundancy version of the second MIB in the second SSB; and / or, the cyclic redundancy version of the second MIB in the first SSB is the same as the cyclic redundancy version of the first MIB in the second SSB; wherein the first SSB and the second SSB are two SSBs that are adjacent in the time domain.

[0233] It should be understood that network devices can continuously send SSBs, and each SSB can have a corresponding index value. In the embodiments of this application, the first SSB can be an SSB with an index value of n, and the second SSB can be an SSB with an index value of n+1.

[0234] Referring to Figures 19A and 19B, in two adjacent SSBs, the first MIB and the second MIB of the two SSBs use different versions of cyclic redundancy. Furthermore, in two adjacent SSBs, the first MIB of the SSB with index value n and the second MIB of the SSB with index value n+1 both use RV0. The second MIB of the SSB with index value n and the first MIB of the SSB with index value n+1 both use RV1.

[0235] In some embodiments, the time-domain position of the first SSB is time-domain continuous with the time-domain position of the second SSB. That is, two adjacent SSBs can be time-domain continuous. For example, referring to FIG14A, the SSB with index value n and the SSB with index value n+1 are time-domain continuous.

[0236] In some embodiments, the time-domain location of the first SSB is spaced apart from the time-domain location of the second SSB by a third number of time units.

[0237] It should be noted that the third quantity can be a parameter predefined in the protocol.

[0238] In other words, two adjacent SSBs may not be contiguous in the time domain. For example, referring to Figure 19B, the SSB with index value n and the SSB with index value n+1 are separated by two time-domain symbols in the time domain.

[0239] It should be noted that in the SSB structure shown in Figures 19A and 19B, the terminal device can select the RO that sends PRACH by means of the association between the SSB with index n+1 and the RO.

[0240] It should be understood that, in this way, in the first case (i.e., when the terminal device uses the first capability to send and receive data), the terminal device can improve the success rate of MIB reception by receiving the first MIB in two consecutive indexed SSBs.

[0241] Option #C: At least a portion of the signal in step S510 includes a PSS. That is, the bandwidth of the PSS in the SSB is less than a first threshold, or the number N of PRBs occupied by the PSS in the SSB is less than or equal to a second threshold.

[0242] It should be noted that the N PRBs occupied by the PSS may include the subcarriers occupied by the PSS, as well as the guard intervals on both sides of the PSS frequency domain.

[0243] It should be understood that the guard interval may include a certain number of subcarriers to avoid inter-subcarrier interference.

[0244] For example, the guard interval on the first side of the PSS frequency domain may include K1 subcarriers, and the guard interval on the second side of the PSS frequency domain may include K2 subcarriers. The first side may be located on a side with high-index subcarriers in the frequency domain, and the second side may be located on a side with low-index subcarriers in the frequency domain.

[0245] It should also be understood that if the number of subcarriers occupied by the PSS is denoted as K3, then N = (K3 + K1 + K2) / 12.

[0246] It should be noted that the guard interval lengths on both sides of the PSS frequency domain can be the same or different. That is, K1 can be equal to K2 or they can be different. This application does not impose any restrictions on this.

[0247] In some embodiments, the number of subcarriers occupied by the PSS (or the PSS length) can be a specific value.

[0248] In some embodiments, the number of subcarriers occupied by the PSS can be any parameter in the first parameter set.

[0249] It should be noted that the parameters included in the first parameter set can be continuous or discrete, and this application embodiment does not impose any restrictions on this.

[0250] In some embodiments, the parameters in the first parameter set can be prime numbers. That is, the number of subcarriers occupied by the PSS is a prime number. For example, the first parameter set is {61,67,71,73,79,83,89,97,101,103,107,109,113,127,…}.

[0251] In some embodiments, the PSS may occupy one or more time-domain symbols.

[0252] Method #D: At least a portion of the signal in step S510 includes an SSS. That is, the bandwidth of the SSS in the SSB is less than a first threshold, or the number N of PRBs occupied by the SSS in the SSB is less than or equal to a second threshold.

[0253] It should be noted that the N PRBs occupied by the SSS include the subcarriers occupied by the SSS, as well as the guard intervals on both sides of the SSS frequency domain.

[0254] It should be understood that the guard interval may include a certain number of subcarriers to avoid inter-subcarrier interference.

[0255] For example, the guard interval on the first side of the SSS frequency domain may include L1 subcarriers, and the guard interval on the second side of the SSS frequency domain may include L2 subcarriers. The first side may be located on a side with high-index subcarriers in the frequency domain, and the second side may be located on a side with low-index subcarriers in the frequency domain.

[0256] It should also be understood that if the number of subcarriers occupied by SSS is recorded as L3, then N = (L3 + L1 + L2) / 12.

[0257] It should be noted that the guard interval lengths on both sides of the SSS frequency domain can be the same or different. That is, L1 can be equal to L2 or they can be different. This application does not impose any restrictions on this.

[0258] In some embodiments, the number of subcarriers occupied by the SSS (or the PSS length) can be a specific value.

[0259] In some embodiments, the number of subcarriers occupied by the SSS can be any parameter in the first parameter set.

[0260] It should be noted that the parameters included in the first parameter set can be continuous or discrete, and this application embodiment does not impose any restrictions on this.

[0261] In some embodiments, the parameters in the first parameter set can be prime numbers. That is, the number of subcarriers occupied by the SSS is a prime number. For example, the first parameter set is {61,67,71,73,79,83,89,97,101,103,107,109,113,127,…}.

[0262] In some embodiments, the SSS may occupy one or more time-domain symbols. It should be understood that the SSS occupying two or more time-domain symbols can indicate more cell IDs.

[0263] It should be noted that when the SSS occupies two time-domain symbols, the number of subcarriers occupied by the SSS, or in other words, the length of the SSS, can be 62. This allows it to match the existing SSB length and carry complete cell ID information.

[0264] In summary, network devices can send SSBs with narrower bandwidths, and correspondingly, terminal devices can receive SSBs with narrower bandwidths. This reduces the detection complexity of terminal devices. At the same time, reducing the bandwidth of the SSB increases the synchronization grid, further reducing detection complexity and power consumption.

[0265] The signal transmission method provided in this application embodiment will be described in detail below with reference to specific application scenarios.

[0266] The core idea of ​​this application is to design a narrower bandwidth SSB. Currently, in a 15kHz subcarrier spacing scenario, the minimum bandwidth of a 5G SSB is 3.6MHz, with the minimum bandwidth of the PSS and SSS being 1.905MHz and the minimum bandwidth of the MIB being 3.6MHz. In a 30kHz subcarrier spacing scenario, the minimum bandwidth of a 5G SSB is 7.2MHz, with the minimum bandwidth of the PSS and SSS being 3.81MHz and the minimum bandwidth of the MIB being 7.2MHz.

[0267] The objective of this application is to compress the SSB bandwidth, including PSS, SSS and MIB, while ensuring that the SSB design is compatible with 5G and LTE.

[0268] This application provides an SSB transmission / SSB reception method. The SSB transmission / SSB reception method includes the following steps:

[0269] Method 1: The SSB uses a 30kHz subcarrier spacing and the SSB bandwidth is less than or equal to 6MHz.

[0270] Method 2: The SSB uses a 15kHz subcarrier spacing, and the SSB bandwidth is less than or equal to 3MHz.

[0271] Method 3: The bandwidth of the SSS / PSS in the SSB and the first MIB is less than or equal to 3MHz, the bandwidth of the second MIB in the SSB is greater than 3MHz, and the MIBs transmitted within 3MHz can be decoded independently.

[0272] The above SSB transmission method will be described in detail below through three examples.

[0273] Example 1: The SSB uses a 30kHz subcarrier spacing and the SSB bandwidth is less than or equal to 6MHz.

[0274] It should be noted that in this embodiment, SSB includes PSS, SSS and MIB.

[0275] It should also be noted that in this embodiment, the SSB uses a 30kHz subcarrier spacing, which helps to improve the robustness of the SSB above 6GHz.

[0276] In the first implementation of Example 1, with a channel bandwidth of 3MHz, the SSB occupies a maximum of N PRBs.

[0277] Where N is a specific value, which can be equal to 6, 7 or 8 depending on the different spectral efficiencies.

[0278] It should be noted that the value of N can be defined by the standard protocol.

[0279] In one implementation (denoted as mode 1A), the value of N is 8 (N=8), that is, the SSB occupies a maximum of 8 PRBs, or in other words, the SSB corresponds to 96 subcarriers.

[0280] To ensure good correlation between different PSS and SSS, the lengths of PSS and SSS (or the number of subcarriers occupied by PSS and SSS) should be prime numbers and meet certain length requirements. Considering this, the lengths of PSS and SSS can be 61, 67, 71, 73, 79, 83, 89.

[0281] It should be understood that a certain number of subcarriers need to be reserved on both sides of the PSS and SSS frequency domains as a guard interval to avoid inter-subcarrier interference.

[0282] It should also be understood that the lengths of PSS and SSS can be equal or unequal. For example, because PSS is more difficult to detect, the length of PSS can be greater than the length of SSS.

[0283] In some embodiments, the PSS occupies one OFDM symbol, while the SSS can occupy one or two OFDM symbols. It should be understood that occupying two OFDM symbols can indicate more cell IDs, in which case the length of the SSS can also be 62, so that two SSS sequences can indicate 1008 cell IDs.

[0284] In some embodiments, the MIB occupies 8 PRBs. On the OFDM symbol where the SSS is located, the MIB can be frequency-division multiplexed with the SSS to make full use of time and frequency resources, or the MIB can not be frequency-division multiplexed with the SSS to increase the frequency domain protection interval of the SSS.

[0285] In some embodiments, the MIB occupies 2 to 6 OFDM symbols, and different numbers of OFDM symbols can achieve a good balance between MIB coverage and resource overhead.

[0286] In some embodiments, the MIB occupies one of the multiple OFDM symbols, which can be located between the PSS and SSS. This ensures that there is a certain interval between the PSS and SSS, which is beneficial to improving frequency synchronization accuracy.

[0287] In some embodiments, when there are two SSS symbols in the SSB (or, the SSS occupies two OFDM symbols), since the second SSS can guarantee frequency synchronization accuracy, all OFDM symbols occupied by the MIB can be located after the SSS.

[0288] In some embodiments, other OFDM symbols in the MIB can be continuous or discontinuous. A continuous OFDM symbol distribution helps reduce the duration of the MIB and lowers the power consumption of the UE in detecting the MIB. A discontinuous distribution, on the other hand, facilitates coexistence with other systems (e.g., LTE or NR). The UE can determine whether the second to last OFDM symbols of the MIB are continuous based on the frequency band. For example, in frequency bands n5 and n66, since LTE systems may exist there, the UE considers the second to last OFDM symbols of the MIB to be continuous. In other frequency bands of FR1, the UE considers all time-domain symbols of the MIB to be continuous.

[0289] In one example, referring to the SSB structure diagram shown in Figures 10A and 10B, the length of both the PSS and SSS is 79 subcarriers. There are 8 and 9 subcarriers on either side of the PSS / SSS in the frequency domain as guard intervals, respectively. The MIB (or the PBCH carrying the MIB) occupies 8 PRBs. The PSS occupies 1 OFDM symbol, the SSS occupies 2 consecutive OFDM symbols, and the MIB occupies 5 OFDM symbols.

[0290] In the SSB shown in Figure 10A, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining four OFDM symbols are located after the OFDM symbol of the SSS.

[0291] In the SSB shown in Figure 10B, the MIB occupies 5 consecutive OFDM symbols, and all 5 consecutive OFDM symbols are located after the OFDM symbols of the SSS.

[0292] In another example, referring to the SSB structure diagram shown in Figures 11A and 11B, the PSS / SSS length is 79 subcarriers, with 8 / 9 subcarriers on each side of the PSS / SSS as guard intervals in the frequency domain. The MIB (or the PBCH carrying the MIB) occupies 8 PRBs. The PSS occupies 1 OFDM symbol, the SSS occupies 2 consecutive OFDM symbols, and the MIB occupies 5 discontinuous OFDM symbols. Occupying 5 discontinuous OFDM symbols helps avoid collisions between the SSB and the Cell Reference Signal (CRS) in the LTE system.

[0293] In the SSB shown in Figure 11A, the first OFDM symbol occupied by the MIB is located between the PSS and the SSS, and the other four OFDM symbols occupied by the MIB are located after the SSS, with a gap of two OFDM symbols between them and the OFDM symbols of the SSS.

[0294] In the SSB shown in Figure 11B, the first OFDM symbol occupied by the MIB is located after the SSS and is continuous with the OFDM symbol of the SSS in the time domain. The remaining 4 OFDM symbols occupied by the MIB are separated from the first OFDM symbol by 2 OFDM symbols.

[0295] In another example, referring to the SSB structure diagram shown in Figure 12, the PSS has a length of 79 subcarriers, with 8 / 9 subcarriers on each side of the PSS frequency domain as guard intervals. The SSS has a length of 61 subcarriers, with 5 / 6 subcarriers on each side of the SSS as guard intervals. On the OFDM symbol containing the SSS, there is a PRB above and below the SSS frequency domain for transmitting the MIB, which helps to reduce the MIB code rate and increase the MIB coverage.

[0296] It should be noted that this application does not limit the 8 / 9 REs to whether they are on high-index subcarriers or low-index subcarriers.

[0297] It should also be noted that PSS and SSS can be of lengths between 61 and 79, such as 67, 71, and 73, which achieves a better balance between reducing inter-carrier interference and PSS / SSS detection performance. Alternatively, larger lengths, such as 83 and 89, can be used to maximize the detection performance of PSS and SSS and reduce inter-carrier interference by improving the accuracy of the UE crystal oscillator.

[0298] In another implementation (denoted as Mode 1B), the value of N is 7 (N = 7), that is, the SSB occupies a maximum of 7 PRBs, or in other words, the SSB corresponds to 84 subcarriers.

[0299] To ensure good correlation between different PSS and SSS, the lengths of PSS and SSS should be prime numbers and meet certain requirements. Considering this, the lengths of PSS and SSS can be 61, 67, 71, 73, or 79.

[0300] It should be understood that a certain number of subcarriers need to be reserved on both sides of the PSS and SSS frequency domains as a guard interval to avoid inter-subcarrier interference.

[0301] It should also be understood that the lengths of PSS and SSS can be equal or unequal. For example, because PSS is more difficult to detect, the length of PSS can be greater than the length of SSS.

[0302] In some embodiments, the PSS occupies 1 OFDM symbol, and the SSS can occupy 1 OFDM symbol or two OFDM symbols. Occupying 2 OFDM symbols can indicate more cell IDs. In this case, the length of the SSS can also be 62, so that two SSS sequences can indicate 1008 cell IDs.

[0303] In some embodiments, the MIB occupies 7 PRBs. On the OFDM symbol where the SSS is located, the MIB can be frequency-division multiplexed with the SSS to make full use of time and frequency resources, or the MIB can not be frequency-division multiplexed with the SSS to increase the frequency domain guard interval of the SSS.

[0304] In some embodiments, the MIB occupies 2 to 6 OFDM symbols, and different numbers of OFDM symbols can achieve a good balance between MIB coverage and resource overhead.

[0305] In some embodiments, the MIB occupies one of the multiple OFDM symbols, which can be located between the PSS and SSS. This ensures that there is a certain interval between the PSS and SSS, which is beneficial to improving frequency synchronization accuracy.

[0306] In some embodiments, when there are two SSS symbols in the SSB (or, the SSS occupies two OFDM symbols), since the second SSS can guarantee frequency synchronization accuracy, all OFDM symbols occupied by the MIB can be located after the SSS.

[0307] In some embodiments, other OFDM symbols can be continuous or discontinuous. A continuous OFDM symbol distribution helps reduce the duration of the MIB, thus lowering the power consumption of the UE in detecting the MIB. Conversely, a discontinuous distribution facilitates coexistence with other systems (e.g., LTE or NR). The UE can determine whether the second to last OFDM symbols of the MIB are continuous based on the frequency band. For example, in frequency bands n5 and n66, since LTE systems may exist there, the UE considers the second to last OFDM symbols of the MIB to be continuous. In other frequency bands of FR1, the UE considers all time-domain symbols of the MIB to be continuous.

[0308] In one example, referring to the SSB structure diagrams shown in Figures 13A and 13B, the length of both the PSS and SSS is 67 subcarriers, with 8 and 9 subcarriers respectively serving as guard intervals on both sides of the PSS / SSS frequency domain. The MIB occupies 7 PRBs. Additionally, the PSS occupies 1 OFDM symbol, and the SSS occupies 2 consecutive OFDM symbols. The MIB occupies 5 OFDM symbols.

[0309] In the SSB shown in Figure 13A, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining four OFDM symbols are located after the OFDM symbol of the SSS.

[0310] In the SSB shown in Figure 13B, the MIB occupies 5 consecutive OFDM symbols, and all 5 consecutive OFDM symbols are located after the OFDM symbols of the SSS.

[0311] In another example, referring to the SSB structure diagram shown in Figures 14A and 14B, the length of both the PSS and SSS is 62 subcarriers, and 11 subcarriers are set on each side of the PSS / SSS as guard intervals in the frequency domain. The MIB (or the PBCH carrying the MIB) occupies 7 PRBs. The PSS occupies 1 OFDM symbol, the SSS occupies 2 consecutive OFDM symbols, and the MIB occupies 5 OFDM symbols.

[0312] In the SSB shown in Figure 14A, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining four OFDM symbols are located after the OFDM symbol of the SSS.

[0313] In Figure 14B, the MIB occupies five consecutive OFDM symbols, and all five consecutive OFDM symbols are located after the OFDM symbols of the SSS.

[0314] In another example, referring to the SSB structure diagrams shown in Figures 15A and 15B, the PSS has a length of 67 REs to ensure good orthogonality. Eight or nine subcarriers are set on each side of the PSS as guard intervals in the frequency domain; the SSS has a length of 62 REs, with 11 REs on each side as guard intervals. The PSS occupies one OFDM symbol, and the SSS occupies two consecutive OFDM symbols. The MIB occupies seven PRBs.

[0315] In the SSB shown in Figure 15A, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining four OFDM symbols are located after the OFDM symbol of the SSS.

[0316] In the SSB shown in Figure 15B, the MIB occupies 5 consecutive OFDM symbols, and all 5 consecutive OFDM symbols are located after the OFDM symbols of the SSS.

[0317] It should be noted that in the examples shown in Figures 15A and 15B, the length of the PSS can also be 61 REs to increase the protection interval on both sides.

[0318] It should also be noted that, similar to N=8, when N=7, the second to the last OFDM symbol of the MIB can be discontinuous to better coexist with the LTE system. This will not be elaborated on here.

[0319] In addition, PSS and SSS can also be made of a larger length, such as 79, to maximize the detection performance of PSS and SSS and reduce inter-carrier interference by improving the accuracy of UE crystal oscillator.

[0320] In the second implementation of Example 1, with a channel bandwidth of 5MHz, the SSB occupies a maximum of N PRBs.

[0321] Where N is a specific value, which can be equal to 12 or 13 depending on the different spectral efficiencies.

[0322] It should be noted that the value of N can be defined by the standard protocol.

[0323] In one implementation (denoted as mode 2A), the value of N is 12 (N = 12).

[0324] In mode 2A, since the number of PRBs is large, the lengths of PSS and SSS can both be 127, which can be consistent with the 5G system and help reduce the complexity of terminal and network implementation.

[0325] In some embodiments, the MIB occupies 12 PRBs. On the OFDM symbol where the SSS is located, the MIB can be frequency-division multiplexed with the SSS to make full use of time and frequency resources, or the MIB can not be frequency-division multiplexed with the SSS to increase the frequency domain guard interval of the SSS.

[0326] In some embodiments, the MIB occupies 2 to 4 OFDM symbols, and different numbers of OFDM symbols can achieve a good balance between MIB coverage and resource overhead.

[0327] In some embodiments, the MIB occupies one of the multiple OFDM symbols, which can be located between the PSS and SSS. This ensures that there is a certain interval between the PSS and SSS, which is beneficial to improving frequency synchronization accuracy.

[0328] In some embodiments, other OFDM symbols in the MIB can be continuous or discontinuous. A continuous OFDM symbol distribution helps reduce the duration of the MIB and lowers the power consumption of the UE in detecting the MIB. A discontinuous distribution, on the other hand, facilitates coexistence with other systems, such as LTE or NR. The UE can determine whether the second to last OFDM symbols of the MIB are continuous based on the frequency band. For example, in frequency bands n5 and n66, since LTE systems may exist there, the UE considers the second to last OFDM symbols of the MIB to be continuous. In other frequency bands of FR1, the UE considers all time-domain symbols of the MIB to be continuous.

[0329] In one example, referring to the SSB structure diagrams shown in Figures 9A and 9B, the length of both the PSS and SSS is 127 subcarriers, with 8 and 9 subcarriers respectively serving as guard intervals on both sides of the PSS / SSS frequency domain. The MIB (which can also be understood as the PBCH carrying the MIB) occupies 12 PRBs. Additionally, both the PSS and SSS occupy 1 OFDM symbol. The MIB occupies 4 OFDM symbols.

[0330] In the SSB shown in Figure 9A, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining three OFDM symbols are located after the OFDM symbol of the SSS, and the three MIB symbols after the SSS symbol are consecutive.

[0331] In the SSB shown in Figure 9B, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining three OFDM symbols are located after the OFDM symbols of the SSS. The three MIB symbols located after the SSS symbols are not consecutive.

[0332] In the third implementation of Example 1, with a channel bandwidth of 6MHz, the SSB occupies a maximum of N PRBs.

[0333] It should be noted that the value of N can be defined by the standard protocol. The following example uses N=15 (that is, the SSB can occupy a maximum of 15 PRBs).

[0334] When N=15, due to the large number of PRBs, the lengths of both PSS and SSS can be 127. There are 27 and 26 REs on either side of the PSS / SSS frequency domain as guard intervals. This application does not restrict whether the 27 / 26 REs are on high-index subcarriers or low-index subcarriers. A PSS / SSS length of 127 can be consistent with 5G systems, which helps reduce the complexity of terminal and network implementation.

[0335] In some embodiments, the MIB occupies 15 PRBs. On the OFDM symbol where the SSS is located, the MIB can be frequency-division multiplexed with the SSS to make full use of time and frequency resources, or the MIB can not be frequency-division multiplexed with the SSS to increase the frequency domain guard interval of the SSS.

[0336] In some embodiments, the MIB occupies 2 to 4 OFDM symbols, and different numbers of OFDM symbols can achieve a good balance between MIB coverage and resource overhead.

[0337] In some embodiments, one of the multiple OFDM symbols occupied by the MIB is located between the PSS and SSS, thereby ensuring a certain interval between the PSS and SSS, which is beneficial to improving frequency synchronization accuracy.

[0338] Among the multiple OFDM symbols occupied by the MIB, the other OFDM symbols can be continuous or discontinuous. Using a continuous OFDM symbol distribution helps to reduce the duration of the MIB and can reduce the power consumption of the UE in detecting the MIB. On the other hand, using a discontinuous distribution is beneficial to achieving coexistence with other systems, such as LTE or NR.

[0339] It should be noted that the UE can determine whether the second to the last OFDM symbol of the MIB is continuous based on the frequency band. For example, if in frequency bands n5 and n66, since there may be LTE systems on them, the UE considers the second to the last OFDM symbol of the MIB to be continuous. On other frequency bands of FR1, the UE considers them to be continuous.

[0340] In one example, referring to the SSB structure diagrams shown in Figures 6A to 6C, the MIB and PSS / SSS are time-division multiplexed. The PSS / SSS are both 127 subcarriers in length, with 27 and 26 subcarriers respectively serving as guard intervals on either side of the PSS / SSS frequency domain. The MIB (or the PBCH carrying the MIB) occupies 15 PRBs. Both the PSS and SSS occupy one OFDM symbol, while the MIB occupies three OFDM symbols.

[0341] In the SSB shown in Figure 6A, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining two OFDM symbols are located after the OFDM symbols of the SSS. Furthermore, the MIB symbol located after the OFDM symbol of the SSS can be consecutive with the SSS symbol.

[0342] In the SSB shown in Figure 6B, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining two OFDM symbols are located after the OFDM symbol of the SSS. Furthermore, the MIB symbol following the OFDM symbol of the SSS is not contiguous with the SSS symbol. Specifically, the second OFDM symbol of the MIB is separated from the SSS symbol by three OFDM symbols.

[0343] In the SSB shown in Figure 6C, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining two OFDM symbols are located after the OFDM symbol of the SSS. Furthermore, the multiple MIB symbols following the OFDM symbol of the SSS are not contiguous. Specifically, the second OFDM symbol of the MIB is contiguous with the SSS symbol, and the third OFDM symbol of the MIB is separated from the second OFDM symbol by two OFDM symbols.

[0344] In another example, referring to the SSB structure diagram shown in Figures 7A and 7B, the MIB and PSS / SSS are time-division multiplexed. The PSS / SSS is 127 subcarriers long, with 27 and 26 subcarriers respectively serving as guard intervals on either side of the PSS / SSS frequency domain. The MIB (or the PBCH carrying the MIB) occupies 15 PRBs. Both the PSS and SSS occupy one OFDM symbol, while the MIB occupies four OFDM symbols.

[0345] In the SSB shown in Figure 7A, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining three OFDM symbols are located after the OFDM symbols of the SSS. Furthermore, the MIB symbol located after the OFDM symbol of the SSS can be consecutive with the SSS symbol.

[0346] In the SSB shown in Figure 7B, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining three OFDM symbols are located after the OFDM symbol of the SSS. Furthermore, the multiple MIB symbols following the OFDM symbol of the SSS are not contiguous. Specifically, the second OFDM symbol of the MIB is contiguous with the SSS symbol, and the third OFDM symbol of the MIB is separated from the second OFDM symbol by two OFDM symbols.

[0347] In another example, referring to the SSB structure diagrams shown in Figures 8A to 8D, the MIB and SSS are frequency-division multiplexed on the OFDM symbols occupied by the SSS. Specifically, the length of both the PSS and SSS is 127 subcarriers, the MIB occupies 3 complete OFDM symbols, and on the OFDM symbol where the SSS is located, the MIB occupies 3 PRBs. The positions of these 3 PRBs are different in Figures 8A / 8B / 8C / 8D.

[0348] In this example, the second and third MIB symbols can be continuous or discontinuous. When continuous, the second and third MIB symbols can be adjacent to the SSS (similar to Figure 6A) or not adjacent (similar to Figures 6B and 6C). The former is beneficial to improving the channel estimation accuracy when decoding the MIB, while the latter can ensure coexistence with LTE. This will not be elaborated further here.

[0349] Example 2: The SSB uses a 15kHz subcarrier spacing, and the bandwidth of the SSB is less than or equal to 3.5MHz.

[0350] In the first implementation of Example 2, the bandwidth of the SSB is 3MHz, which includes 15 PRBs. The SSB includes PSS, SSS and MIB, and the SSB occupies a maximum of 15 PRBs.

[0351] In this approach, due to the large number of PRBs, the lengths of both PSS and SSS can be 127, with 27 and 26 subcarriers on each side as guard intervals. This application does not restrict whether the 26 / 27 REs are on high-index subcarriers or low-index subcarriers. A PSS / SSS length of 127 can be consistent with 5G systems, which helps reduce the complexity of terminal and network implementation.

[0352] In some embodiments, the MIB occupies 15 PRBs. On the OFDM symbol where the SSS is located, the MIB can be frequency-division multiplexed with the SSS to make full use of time and frequency resources, or the MIB can not be frequency-division multiplexed with the SSS to increase the frequency domain guard interval of the SSS.

[0353] In some embodiments, the MIB occupies 2 to 4 OFDM symbols, and different numbers of OFDM symbols can achieve a good balance between MIB coverage and resource overhead.

[0354] In some embodiments, one OFDM symbol of the MIB is located between the PSS and SSS, thus ensuring a certain interval between the PSS and SSS, which is beneficial for improving frequency synchronization accuracy. Other OFDM symbols can be continuous or discontinuous. A continuous OFDM symbol distribution helps reduce the duration of the MIB, thus reducing the power consumption of the UE in detecting the MIB. A discontinuous distribution facilitates coexistence with other systems, such as LTE or NR. The UE can determine whether the second to last OFDM symbols of the MIB are continuous based on the frequency band. For example, in frequency bands n5 and n66, since LTE systems may exist there, the UE considers the second to last OFDM symbols of the MIB to be continuous. In other frequency bands of FR1, the UE considers them continuous.

[0355] In one example, referring to the SSB structure diagrams shown in Figures 6A to 6C, the MIB and PSS / SSS are time-division multiplexed. The PSS / SSS are both 127 subcarriers in length, with 27 and 26 subcarriers respectively serving as guard intervals on either side of the PSS / SSS frequency domain. The MIB (or the PBCH carrying the MIB) occupies 15 PRBs. Both the PSS and SSS occupy one OFDM symbol, while the MIB occupies three OFDM symbols.

[0356] In the SSB shown in Figure 6A, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining two OFDM symbols are located after the OFDM symbols of the SSS. Furthermore, the MIB symbol located after the OFDM symbol of the SSS can be consecutive with the SSS symbol.

[0357] In the SSB shown in Figure 6B, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining two OFDM symbols are located after the OFDM symbol of the SSS. Furthermore, the MIB symbol following the OFDM symbol of the SSS is not contiguous with the SSS symbol. Specifically, the second OFDM symbol of the MIB is separated from the SSS symbol by three OFDM symbols.

[0358] In the SSB shown in Figure 6C, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining two OFDM symbols are located after the OFDM symbol of the SSS. Furthermore, the multiple MIB symbols following the OFDM symbol of the SSS are not contiguous. Specifically, the second OFDM symbol of the MIB is contiguous with the SSS symbol, and the third OFDM symbol of the MIB is separated from the second OFDM symbol by two OFDM symbols.

[0359] In another example, referring to the SSB structure diagram shown in Figures 7A and 7B, the MIB and PSS / SSS are time-division multiplexed. The PSS / SSS is 127 subcarriers long, with 27 and 26 subcarriers respectively serving as guard intervals on either side of the PSS / SSS frequency domain. The MIB (or the PBCH carrying the MIB) occupies 15 PRBs. Both the PSS and SSS occupy one OFDM symbol, while the MIB occupies four OFDM symbols.

[0360] In the SSB shown in Figure 7A, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining three OFDM symbols are located after the OFDM symbols of the SSS. Furthermore, the MIB symbol located after the OFDM symbol of the SSS can be consecutive with the SSS symbol.

[0361] In the SSB shown in Figure 7B, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining three OFDM symbols are located after the OFDM symbol of the SSS. Furthermore, the multiple MIB symbols following the OFDM symbol of the SSS are not contiguous. Specifically, the second OFDM symbol of the MIB is contiguous with the SSS symbol, and the third OFDM symbol of the MIB is separated from the second OFDM symbol by two OFDM symbols.

[0362] In another example, referring to the SSB structure diagrams shown in Figures 8A to 8D, the MIB and SSS are frequency-division multiplexed on the OFDM symbols occupied by the SSS. Specifically, the length of both the PSS and SSS is 127 subcarriers, the MIB occupies 3 complete OFDM symbols, and on the OFDM symbol where the SSS is located, the MIB occupies 3 PRBs. The positions of these 3 PRBs are different in Figures 8A / 8B / 8C / 8D.

[0363] In this example, the second and third MIB symbols can be continuous or discontinuous. When continuous, the second and third MIB symbols can be adjacent to the SSS (similar to Figure 6A) or not adjacent (similar to Figures 6B and 6C). The former is beneficial to improving the channel estimation accuracy when decoding the MIB, while the latter can ensure coexistence with LTE. This will not be elaborated further here.

[0364] In the second implementation of Example 2, the bandwidth of SSB is 12 PRBs, and the corresponding channel bandwidth is greater than 2.16MHz and less than 3MHz. SSB includes PSS, SSS and MIB, and SSB occupies 12 PRBs.

[0365] In this approach, due to the large number of PRBs, the lengths of both PSS and SSS can be 127, with 8 / 9 subcarriers on each side serving as guard intervals. This application does not restrict whether the 8 / 9 REs are on high-index subcarriers or low-index subcarriers. A PSS / SSS length of 127 can be consistent with 5G systems, which helps reduce the complexity of terminal and network implementation.

[0366] In some embodiments, the MIB occupies 12 PRBs and is not frequency-division multiplexed with the SSS to increase the frequency domain guard interval of the SSS. The MIB occupies 4 OFDM symbols.

[0367] In some embodiments, one OFDM symbol is located between the PSS and SSS, ensuring a certain interval between the PSS and SSS, which is beneficial for improving frequency synchronization accuracy. Other OFDM symbols can be continuous or discontinuous. A continuous OFDM symbol distribution helps reduce the duration of the MIB, thus reducing the power consumption of the UE in detecting the MIB. A discontinuous distribution facilitates coexistence with other systems, such as LTE or NR. The UE can determine whether the second to last OFDM symbols of the MIB are continuous based on the frequency band. For example, in frequency bands n5 and n66, since LTE systems may exist there, the UE considers the second to last OFDM symbols of the MIB to be continuous. In other frequency bands of FR1, the UE considers them continuous.

[0368] In one example, referring to the SSB structure diagrams shown in Figures 9A and 9B, the length of both the PSS and SSS is 127 subcarriers, with 8 and 9 subcarriers respectively serving as guard intervals on both sides of the PSS / SSS frequency domain. The MIB (which can also be understood as the PBCH carrying the MIB) occupies 12 PRBs. Additionally, both the PSS and SSS occupy 1 OFDM symbol. The MIB occupies 4 OFDM symbols. The second MIB symbol and the third and fourth MIB symbols can be consecutive or discontinuous; the former improves the channel estimation accuracy when decoding the MIB, while the latter ensures coexistence with LTE.

[0369] In the SSB shown in Figure 9A, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining three OFDM symbols are located after the OFDM symbol of the SSS, and the three MIB symbols after the SSS symbol are consecutive.

[0370] In the SSB shown in Figure 9B, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining three OFDM symbols are located after the OFDM symbols of the SSS. The three MIB symbols located after the SSS symbols are not consecutive.

[0371] In the third implementation of Example 2, the channel bandwidth is 2MHz, the bandwidth of SSB is 11 PRBs, and SSB includes PSS, SSS and MIB.

[0372] In this approach, due to the large number of PRBs, the lengths of both PSS and SSS can be 127, with 2 / 3 subcarriers on each side serving as guard intervals. This application does not restrict whether the 2 / 3 REs are on high-index subcarriers or low-index subcarriers. A PSS / SSS length of 127 can be consistent with 5G systems, which helps reduce the complexity of terminal and network implementation.

[0373] The MIB occupies 11 PRBs. The MIB is not frequency-division multiplexed with the SSS to increase the frequency domain guard interval of the SSS. The MIB occupies 4 OFDM symbols.

[0374] One OFDM symbol in the MIN is located between the PSS and SSS, ensuring a certain interval between them and improving frequency synchronization accuracy. Other OFDM symbols can be continuous or discontinuous. A continuous OFDM symbol distribution reduces the duration of the MIB, lowering the UE's power consumption for MIB detection. A discontinuous distribution facilitates coexistence with other systems, such as LTE or NR. The UE can determine whether the second to last OFDM symbols of the MIB are continuous based on the frequency band. For example, in frequency bands n5 and n66, where LTE systems may exist, the UE considers the second to last OFDM symbols of the MIB to be continuous. In other frequency bands of FR1, the UE considers them continuous.

[0375] In one example, referring to the SSB structure diagrams shown in Figures 16A and 16B, the PSS / SSS is 127 subcarriers in length, with 2 / 3 subcarriers on each side of the PSS / SSS frequency domain as guard intervals. The MIB (which can also be understood as the PBCH carrying the MIB) occupies 11 PRBs. Additionally, both the PSS and SSS occupy 1 OFDM symbol. The MIB occupies 4 OFDM symbols. The MIB and PSS / SSS are time-division multiplexed. The second MIB symbol and the third and fourth MIB symbols can be consecutive or discontinuous; the former improves the channel estimation accuracy when decoding the MIB, while the latter ensures coexistence with LTE.

[0376] In the SSB shown in Figure 16A, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining three OFDM symbols are located after the OFDM symbols of the SSS. Furthermore, the three MIB symbols located after the SSS symbols are consecutive, which is beneficial to improving the channel estimation accuracy when decoding the MIB.

[0377] In the SSB shown in Figure 16B, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining three OFDM symbols are located after the OFDM symbols of the SSS. Furthermore, the second MIB symbol and the third / fourth MIB symbol are not consecutive, which can ensure coexistence with LTE.

[0378] In the fourth implementation of Example 2, the channel bandwidth is 2MHz, the bandwidth of SSB is 10 PRBs, and SSB includes PSS, SSS and MIB.

[0379] In this approach, since the number of PRBs is only 10, the lengths of PSS and SSS can both be 109 or 113. The following example uses a PSS and SSS length of 113. In this case, there are 3 / 4 subcarriers on each side of the PSS and SSS as guard intervals. This application does not restrict whether the 3 / 4 REs are on high-index subcarriers or low-index subcarriers.

[0380] The MIB occupies 10 PRBs. The MIB is not frequency-division multiplexed with the SSS to increase the frequency domain guard interval of the SSS. The MIB occupies 4 OFDM symbols.

[0381] One OFDM symbol is located between the PSS and SSS, ensuring a certain interval between them and improving frequency synchronization accuracy. Other OFDM symbols can be continuous or discontinuous. A continuous OFDM symbol distribution reduces the duration of the MIB, lowering the UE's power consumption for MIB detection. A discontinuous distribution facilitates coexistence with other systems, such as LTE or NR. The UE can determine whether the second to last OFDM symbols of the MIB are continuous based on the frequency band. For example, in frequency bands n5 and n66, where LTE systems may exist, the UE considers the second to last OFDM symbols of the MIB to be continuous. In other frequency bands of FR1, the UE considers them continuous.

[0382] In one example, referring to Figures 17A and 17B, the length of the PSS / SSS is 113, the MIB occupies 4 OFDM symbols, and the MIB and PSS / SSS are time-division multiplexed. The second MIB symbol and the third and fourth MIB symbols can be consecutive or discontinuous. The former is beneficial for improving the channel estimation accuracy when decoding the MIB, while the latter can ensure coexistence with LTE.

[0383] In the SSB shown in Figure 17A, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining three OFDM symbols are located after the OFDM symbols of the SSS. Furthermore, the three MIB symbols located after the SSS symbols are consecutive, which is beneficial to improving the channel estimation accuracy when decoding the MIB.

[0384] In the SSB shown in Figure 17B, the first OFDM symbol occupied by the MIB is between the PSS and SSS, and the remaining three OFDM symbols are located after the OFDM symbols of the SSS. Furthermore, the second MIB symbol and the third / fourth MIB symbol are not consecutive, which can ensure coexistence with LTE.

[0385] Example 3: The bandwidth of SSS / PSS in SSB is less than or equal to 3MHz, while the bandwidth of MIB can be greater than 3MHz, but MIBs transmitted within 3MHz can be decoded independently.

[0386] It should be noted that in 6G, in order to better reduce the energy consumption of the UE, in the first case, the UE can receive or send signals through the first UE function / capability set, or the UE can receive / send signals through the first signal set, or the UE can receive / send signals within the first resource set, or the UE can receive / send signals through the small function core.

[0387] In the second scenario: the UE can also receive or transmit signals through a second set of UE functions / capabilities, or the UE can receive / transmit a second set of signals, or the UE can receive / transmit signals within a second set of resources, or the UE can receive / transmit signals through a large functional core. Alternatively, the UE can receive or transmit signals through capabilities / functions beyond the first set of UE functions / capabilities, or the UE can receive / transmit signals outside the first set of signals, or the UE can receive / transmit signals within resources outside the first set of resources.

[0388] It should be noted that at least one function / capability in the second UE function / capability set is different from that in the first UE function / capability set, such as maximum receive or transmit bandwidth; the time-frequency resources occupied by the second signal set, or the time-frequency resources contained in the second resource set are different from those in the first signal / resource set;

[0389] It should also be noted that the same UE can switch between the first UE function / capability set and the second UE function / capability set, or only support the first UE function / capability set; the same UE can receive / transmit different signal sets at different times, or only receive / transmit the first signal combination; the same UE can receive / transmit signals in different resource sets at different times, or only receive / transmit signals in the first resource set.

[0390] For example, the UE function / capability set includes the UE's receive bandwidth, transmit bandwidth, receive antenna, transmit antenna, number of receive ports, number of transmit ports, number of transmit layers, maximum supported MCS, maximum data rate, etc.

[0391] In the two cases mentioned above, the maximum bandwidth that the UE can receive may be different. Therefore, another objective of this application is to design an SSB that can simultaneously meet the needs of UEs with different bandwidth receiving capabilities.

[0392] In this third embodiment, the bandwidth of PSS / SSS is less than 3MHz, and the MIB is divided into two parts. The first part (i.e., the first MIB) is located within the bandwidth occupied by PSS / SSS and the corresponding protection interval, and the second part (i.e., the second MIB) is located in other PRBs.

[0393] In the first scenario described above, where the UE receives or transmits signals through a first set of UE functions / capabilities, or receives / transmits a first set of signals, or receives / transmits signals within a first set of resources, or receives / transmits signals through a small functional core, the UE can receive only the first part of the MIB (i.e., the first MIB) and obtain all the information carried in the MIB through this part (i.e., the first MIB). In the second scenario, the UE can receive both the first part (i.e., the first MIB) and the second part (i.e., the second MIB), improving the MIB decoding success rate.

[0394] An example is shown in Figure 18, where the first part of the MIB (i.e., the first MIB) is the first cyclic redundancy version after MIB encoding, such as rv0, and the second part (i.e., the second MIB) is the second cyclic redundancy version after MIB encoding, such as RV1. The bandwidth of the first part is less than 3MHz, and the frequency domain span of the second part is greater than 3MHz. Since the first part contains all the information of the MIB, the information required for accessing the cell can be obtained after receiving the first part.

[0395] Another example is shown in Figures 19A and 19B. In the SSB with index n, the first part of the MIB (i.e., the first MIB) is the first cyclic redundancy version encoded by the MIB, such as RV0, and the second part of the MIB (i.e., the second MIB) is the second cyclic redundancy version encoded by the MIB, such as RV1. In the SSB with index n+1, the first part of the MIB (i.e., the first MIB) is the second cyclic redundancy version encoded by the MIB, such as RV1, and the second part of the MIB (i.e., the second MIB) is the first cyclic redundancy version encoded by the MIB, such as RV0. In the example of Figure 19A, the two SSBs are temporally consecutive, while in the example of Figure 19B, the two SSBs are temporally discontinuous. In this way, in the first case, the UE can improve the success rate of MIB reception by receiving the first part of two consecutive indexed SSBs. In this case, the UE can select the RO to send PRACH based on the association between the SSB with index n+1 and the RO.

[0396] By using the SSB transmission and reception methods proposed in this application, network devices can transmit SSBs with a bandwidth of less than or equal to 6MHz (subcarrier spacing of 30kHz) / 3MHz (subcarrier spacing of 15kHz), thereby reducing the complexity and power consumption of UE receiving SSBs.

[0397] 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.

[0398] It should also be understood that, in the various method embodiments of this application, the order of the above-mentioned processes 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.

[0399] Figure 20 is a schematic diagram of the structural composition of a signal receiving device 2000 provided in an embodiment of this application, applied to a terminal device. As shown in Figure 20, the signal receiving device 2000 may include:

[0400] The first communication unit 2010 is configured to receive a synchronization signal block, wherein the bandwidth of at least a portion of the signals in the synchronization signal block is less than or equal to a first threshold; the first threshold is related to the subcarrier spacing used in the synchronization signal block.

[0401] In some embodiments, when the subcarrier spacing used by the synchronization signal block is 30 kHz, the first threshold is any one of 6 MHz, 5 MHz, and 3 MHz.

[0402] When the subcarrier spacing used in the synchronization signal block is 15 kHz, the first threshold is 3 MHz or 2 MHz.

[0403] In some embodiments, the number of physical resource blocks (PRBs) occupied by at least a portion of the signals in the synchronization signal block is N, where N is an integer greater than 1; N is related to the first threshold and / or the subcarrier spacing.

[0404] In some embodiments, when the subcarrier spacing used in the synchronization signal block is 30 kHz and the first threshold is 6 MHz, N is less than or equal to 15;

[0405] When the subcarrier spacing used in the synchronization signal block is 30kHz and the first threshold is 5MHz, N is less than or equal to 13;

[0406] When the subcarrier spacing used in the synchronization signal block is 30kHz and the first threshold is 3MHz, N is less than or equal to 8;

[0407] When the subcarrier spacing used in the synchronization signal block is 15kHz and the first threshold is 3MHz, N is less than or equal to 15;

[0408] When the subcarrier spacing used in the synchronization signal block is 15 kHz and the first threshold is 2 MHz, N is less than or equal to 11.

[0409] In some embodiments, the at least part of the signal includes a master synchronization signal;

[0410] The N PRBs occupied by the main synchronization signal include the subcarriers occupied by the main synchronization signal and the guard intervals on both sides of the main synchronization signal in the frequency domain.

[0411] In some embodiments, the at least part of the signal further includes an auxiliary synchronization signal;

[0412] The N PRBs occupied by the auxiliary synchronization signal include the subcarriers occupied by the auxiliary synchronization signal and the guard intervals on both sides of the frequency domain of the auxiliary synchronization signal.

[0413] In some embodiments, the number of subcarriers occupied by the primary synchronization signal and / or the number of subcarriers occupied by the secondary synchronization signal are any parameter in the first parameter set.

[0414] In some embodiments, the parameters in the first parameter set are prime numbers.

[0415] In some embodiments, the number of subcarriers occupied by the primary synchronization signal is greater than or equal to the number of subcarriers occupied by the secondary synchronization signal.

[0416] In some embodiments, the primary synchronization signal occupies one or more time domain symbols; and / or, the secondary synchronization signal occupies one or more time domain symbols.

[0417] In some embodiments, the at least part of the signal further includes a main information block; the main information block occupies N PRBs and multiple time-domain symbols.

[0418] In some embodiments, the main information block and the secondary synchronization signal are frequency-division multiplexed on one or more time-domain symbols occupied by the secondary synchronization signal, or the primary information block is not used to transmit on one or more time-domain symbols occupied by the secondary synchronization signal.

[0419] In some embodiments, the multiple time-domain symbols occupied by the main information block are all located after one or more time-domain symbols occupied by the secondary synchronization signal.

[0420] In some embodiments, at least one of the multiple time-domain symbols occupied by the main information block is located between one or more time-domain symbols occupied by the main synchronization signal and one or more time-domain symbols occupied by the auxiliary synchronization signal;

[0421] The remaining time-domain symbols among the multiple time-domain symbols occupied by the main information block are located after one or more time-domain symbols occupied by the auxiliary synchronization signal.

[0422] In some embodiments, among the multiple time-domain symbols occupied by the main information block, the multiple time-domain symbols that follow the time-domain symbols occupied by the secondary synchronization signal are consecutive in the time domain;

[0423] or,

[0424] Among the multiple time-domain symbols occupied by the main information block, the first part of the time-domain symbols and the second part of the time-domain symbols are spaced apart by a first number of time-domain symbols.

[0425] In some embodiments, among the multiple time-domain symbols occupied by the main information block, multiple time-domain symbols located after the time-domain symbols occupied by the secondary synchronization signal are time-domain continuous with one or more time-domain symbols occupied by the secondary synchronization signal.

[0426] or,

[0427] Among the multiple time-domain symbols occupied by the main information block, the multiple time-domain symbols located after the time-domain symbols occupied by the auxiliary synchronization signal are spaced apart from one or more time-domain symbols occupied by the auxiliary synchronization signal by a second number of time-domain symbols in the time domain.

[0428] In some embodiments, the synchronization signal block further includes a master information block, the bandwidth of which is greater than the first threshold.

[0429] In some embodiments, the main information block includes a first main information block and a second main information block;

[0430] The first main information block occupies the same N PRBs as the main synchronization signal and / or the auxiliary synchronization signal;

[0431] The PRB occupied by the second main information block is located in other PRBs outside of the N PRBs.

[0432] In some embodiments, the first master information block occupies multiple time-domain symbols;

[0433] At least one time-domain symbol among the multiple time-domain symbols occupied by the first main information block is located between one or more time-domain symbols occupied by the main synchronization signal and one or more time-domain symbols occupied by the auxiliary synchronization signal, and the remaining time-domain symbols among the multiple time-domain symbols occupied by the first main information block are located after one or more time-domain symbols occupied by the auxiliary synchronization signal.

[0434] or,

[0435] The multiple time-domain symbols occupied by the first main information block are all located after one or more time-domain symbols occupied by the auxiliary synchronization signal.

[0436] In some embodiments, the second master information block is frequency-division multiplexed with one or more of the master synchronization signal, the auxiliary synchronization signal, and the first master information block.

[0437] In some embodiments, the information carried by the first main information block and the information carried by the second main information block are the same.

[0438] In some embodiments, when the terminal device performs data transmission and reception based on the first capability, the terminal device obtains the information carried in the main information block based on the first main information block;

[0439] When the terminal device transmits and receives data based on the second capability, the terminal device obtains the information carried in the main information block based on the first main information block and the second main information block; the second capability is greater than the first capability.

[0440] In some embodiments, the cyclic redundancy version of the first master information block is different from the cyclic tolerance version of the second master information block.

[0441] In some embodiments, the number of synchronization signal blocks may include multiple blocks;

[0442] The cyclic redundancy version of the first main information block in the first synchronization signal block is the same as the cyclic redundancy version of the second main information block in the second synchronization signal block.

[0443] And / or,

[0444] The cyclic redundancy version of the second main information block in the first synchronization signal block is the same as the cyclic redundancy version of the first main information block in the second synchronization signal block.

[0445] The first synchronization signal block and the second synchronization signal block are two synchronization signal blocks that are adjacent in the time domain.

[0446] In some embodiments, the time-domain position of the first synchronization signal block is continuous with the time-domain position of the second synchronization signal block in the time domain.

[0447] In some embodiments, the time-domain position of the first synchronization signal block is spaced apart from the time-domain position of the second synchronization signal block by a third number of time units.

[0448] Those skilled in the art should understand that the description of the signal receiving device in the embodiments of this application can be understood with reference to the description of the signal receiving method in the embodiments of this application.

[0449] Figure 21 is a schematic diagram of the structure of a signal transmitting device 2100 provided in an embodiment of this application, applied to a network device. As shown in Figure 21, the signal transmitting device 2100 may include:

[0450] The second communication unit 2110 is configured to transmit a synchronization signal block, wherein the bandwidth of at least a portion of the signals in the synchronization signal block is less than or equal to a first threshold; the first threshold is related to the subcarrier spacing used by the synchronization signal.

[0451] In some embodiments, when the subcarrier spacing used by the synchronization signal block is 30 kHz, the first threshold is any one of 6 MHz, 5 MHz, and 3 MHz.

[0452] When the subcarrier spacing used in the synchronization signal block is 15 kHz, the first threshold is 3 MHz or 2 MHz.

[0453] In some embodiments, the number of physical resource blocks (PRBs) occupied by at least a portion of the signals in the synchronization signal block is N, where N is an integer greater than 1; N is related to the first threshold and / or the subcarrier spacing.

[0454] In some embodiments, when the subcarrier spacing used in the synchronization signal block is 30 kHz and the first threshold is 6 MHz, N is less than or equal to 15;

[0455] When the subcarrier spacing used in the synchronization signal block is 30kHz and the first threshold is 5MHz, N is less than or equal to 13;

[0456] When the subcarrier spacing used in the synchronization signal block is 30kHz and the first threshold is 3MHz, N is less than or equal to 8;

[0457] When the subcarrier spacing used in the synchronization signal block is 15kHz and the first threshold is 3MHz, N is less than or equal to 15;

[0458] When the subcarrier spacing used in the synchronization signal block is 15 kHz and the first threshold is 2 MHz, N is less than or equal to 11.

[0459] In some embodiments, the at least part of the signal includes a master synchronization signal;

[0460] The N PRBs occupied by the main synchronization signal include the subcarriers occupied by the main synchronization signal and the guard intervals on both sides of the main synchronization signal in the frequency domain.

[0461] In some embodiments, the at least part of the signal further includes an auxiliary synchronization signal;

[0462] The N PRBs occupied by the auxiliary synchronization signal include the subcarriers occupied by the auxiliary synchronization signal and the guard intervals on both sides of the frequency domain of the auxiliary synchronization signal.

[0463] In some embodiments, the number of subcarriers occupied by the primary synchronization signal and / or the number of subcarriers occupied by the secondary synchronization signal are any parameter in the first parameter set.

[0464] In some embodiments, the parameters in the first parameter set are prime numbers.

[0465] In some embodiments, the number of subcarriers occupied by the primary synchronization signal is greater than or equal to the number of subcarriers occupied by the secondary synchronization signal.

[0466] In some embodiments, the master synchronization signal occupies one or more time-domain symbols; and / or,

[0467] The auxiliary synchronization signal occupies one or more time domain symbols.

[0468] In some embodiments, the at least part of the signal further includes a main information block; the main information block occupies N PRBs and multiple time-domain symbols.

[0469] In some embodiments, the main information block and the secondary synchronization signal are frequency-division multiplexed on one or more time-domain symbols occupied by the secondary synchronization signal, or the primary information block is not used to transmit on one or more time-domain symbols occupied by the secondary synchronization signal.

[0470] In some embodiments, the multiple time-domain symbols occupied by the main information block are all located after one or more time-domain symbols occupied by the secondary synchronization signal.

[0471] In some embodiments, at least one of the multiple time-domain symbols occupied by the main information block is located between one or more time-domain symbols occupied by the main synchronization signal and one or more time-domain symbols occupied by the auxiliary synchronization signal;

[0472] The remaining time-domain symbols among the multiple time-domain symbols occupied by the main information block are located after one or more time-domain symbols occupied by the auxiliary synchronization signal.

[0473] In some embodiments, among the multiple time-domain symbols occupied by the main information block, the multiple time-domain symbols that follow the time-domain symbols occupied by the secondary synchronization signal are consecutive in the time domain;

[0474] or,

[0475] Among the multiple time-domain symbols occupied by the main information block, the first part of the time-domain symbols and the second part of the time-domain symbols are spaced apart by a first number of time-domain symbols.

[0476] In some embodiments, among the multiple time-domain symbols occupied by the main information block, multiple time-domain symbols located after the time-domain symbols occupied by the secondary synchronization signal are time-domain continuous with one or more time-domain symbols occupied by the secondary synchronization signal.

[0477] or,

[0478] Among the multiple time-domain symbols occupied by the main information block, the multiple time-domain symbols located after the time-domain symbols occupied by the auxiliary synchronization signal are spaced apart from one or more time-domain symbols occupied by the auxiliary synchronization signal by a second number of time-domain symbols in the time domain.

[0479] In some embodiments, the bandwidth of the main information block is greater than the first threshold.

[0480] In some embodiments, the main information block includes a first main information block and a second main information block;

[0481] The first main information block occupies the same N PRBs as the main synchronization signal and / or the auxiliary synchronization signal;

[0482] The PRB occupied by the second main information block is located in other PRBs outside of the N PRBs.

[0483] In some embodiments, the first master information block occupies multiple time-domain symbols;

[0484] At least one time-domain symbol among the multiple time-domain symbols occupied by the first main information block is located between one or more time-domain symbols occupied by the main synchronization signal and one or more time-domain symbols occupied by the auxiliary synchronization signal, and the remaining time-domain symbols among the multiple time-domain symbols occupied by the first main information block are located after one or more time-domain symbols occupied by the auxiliary synchronization signal.

[0485] or,

[0486] The multiple time-domain symbols occupied by the first main information block are all located after one or more time-domain symbols occupied by the auxiliary synchronization signal.

[0487] In some embodiments, the second master information block is frequency-division multiplexed with one or more of the master synchronization signal, the auxiliary synchronization signal, and the first master information block.

[0488] In some embodiments, the information carried by the first main information block and the information carried by the second main information block are the same.

[0489] In some embodiments, the first main information block is used by a terminal device with a first capability to obtain information carried in the main information block;

[0490] The first main information block and the second main information block are used by the terminal device with the second capability to obtain the information carried in the main information block; the second capability is greater than the first capability.

[0491] In some embodiments, the cyclic redundancy version of the first master information block is different from the cyclic tolerance version of the second master information block.

[0492] In some embodiments, the number of synchronization signal blocks may include multiple blocks;

[0493] The cyclic redundancy version of the first main information block in the first synchronization signal block is the same as the cyclic redundancy version of the second main information block in the second synchronization signal block.

[0494] And / or,

[0495] The cyclic redundancy version of the second main information block in the first synchronization signal block is the same as the cyclic redundancy version of the first main information block in the second synchronization signal block.

[0496] The first synchronization signal block and the second synchronization signal block are two synchronization signal blocks that are adjacent in the time domain.

[0497] In some embodiments, the time-domain position of the first synchronization signal block is continuous with the time-domain position of the second synchronization signal block in the time domain.

[0498] In some embodiments, the time-domain position of the first synchronization signal block is spaced apart from the time-domain position of the second synchronization signal block by a third number of time units.

[0499] Those skilled in the art should understand that the description of the signal transmitting device in the embodiments of this application can be understood with reference to the description of the signal transmitting method in the embodiments of this application.

[0500] Figure 22 is a schematic diagram of the structural composition of a communication device according to an embodiment of this application. The communication device 2200 can be a network device or a terminal device. The communication device 2200 shown in Figure 22 may include a processor 2210, a memory 2220, and a transceiver 2230, wherein:

[0501] Memory 2220 is used to store computer programs;

[0502] The processor 2210, connected to the memory 2220, is used to call and run a computer program from the memory 2220 to implement the method in the embodiments of this application;

[0503] The transceiver 2230, also known as a communication interface, is used for receiving and sending information during communication with other external devices.

[0504] In some embodiments, the memory 2220 may be a separate device independent of the processor 2210, or it may be integrated into the processor 2210.

[0505] In some embodiments, transceiver 2230 may include an input interface. Processor 2210 may control this input interface to communicate with other external devices; specifically, it may receive information or data sent by other external devices.

[0506] In some embodiments, transceiver 2230 may include an output interface. Processor 2210 may control this output interface to communicate with other external devices; specifically, it may send information or data to other external devices.

[0507] In some embodiments, transceiver 2230 may include a transmitter and a receiver. Transceiver 2230 may further include antennas, and the number of antennas may be one or more.

[0508] In some embodiments, the communication device 2200 can be applied to the terminal device of the present application embodiment, and the communication device 2200 can implement the corresponding processes implemented by the terminal device in the various methods of the present application embodiment. For the sake of brevity, it will not be described in detail here.

[0509] In some embodiments, the communication device 2200 can be applied to the network device of the present application embodiment, and the communication device 2200 can implement the corresponding processes implemented by the network device in the various methods of the present application embodiment. For the sake of brevity, it will not be described in detail here.

[0510] Figure 23 is a schematic structural diagram of a chip provided in an embodiment of this application. The chip 2300 shown in Figure 23 includes a processor 2310, which can call and run computer programs from memory to implement the methods in the embodiments of this application.

[0511] In some embodiments, as shown in FIG23, chip 2300 may further include memory 2320. Processor 2310 may retrieve and run computer programs from memory 2320 to implement the methods described in this application embodiment.

[0512] The memory 2320 can be a separate device independent of the processor 2310, or it can be integrated into the processor 2310.

[0513] In some embodiments, the chip 2300 may further include an input interface 2330. The processor 2310 can control the input interface 2330 to communicate with other devices or chips; specifically, it can acquire information or data sent by other devices or chips.

[0514] In some embodiments, the chip 2300 may further include an output interface 2340. The processor 2310 can control the output interface 2340 to communicate with other devices or chips; specifically, it can output information or data to other devices or chips.

[0515] In some embodiments, 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.

[0516] In some embodiments, 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.

[0517] 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.

[0518] Figure 24 is a schematic block diagram of a communication system provided in an embodiment of this application. As shown in Figure 24, the communication system 2400 includes a terminal device 2410 and a network device 2420.

[0519] The terminal device 2410 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 2420 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, they will not be described in detail here.

[0520] 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, each step 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, etc. 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.

[0521] 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.

[0522] This application also provides a computer-readable storage medium storing a computer program that, when executed by at least one processor, implements the method described in this application.

[0523] In some embodiments, 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.

[0524] In some embodiments, the computer-readable storage medium may 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, these will not be described in detail here.

[0525] This application also provides a computer program product, which includes a computer storage medium storing a computer program. The computer program includes instructions executable by at least one processor, which, when executed by at least one processor, implement the methods described in this application.

[0526] In some embodiments, 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.

[0527] In some embodiments, 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.

[0528] This application also provides a computer program that causes a computer to perform the methods described in this application.

[0529] In some embodiments, the computer program can be applied to the terminal device in the embodiments of this application. When the computer program is run on a 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.

[0530] In some embodiments, the computer program can be applied to the network device in the embodiments of this application. When the computer program is run on a 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.

[0531] 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.

[0532] 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.

[0533] In the 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 mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection of apparatuses or units may be electrical, mechanical, or other forms.

[0534] 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.

[0535] 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.

[0536] 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, ROM, RAM, magnetic disks, or optical disks.

[0537] 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 receiving method, the method comprising: The terminal device receives a synchronization signal block, wherein the bandwidth of at least a portion of the signals in the synchronization signal block is less than or equal to a first threshold. The first threshold is related to the subcarrier spacing used by the synchronization signal block.

2. The method according to claim 1, wherein, When the subcarrier spacing used in the synchronization signal block is 30kHz, the first threshold is any one of 6MHz, 5MHz, and 3MHz; When the subcarrier spacing used in the synchronization signal block is 15 kHz, the first threshold is 3 MHz or 2 MHz.

3. The method according to claim 1 or 2, wherein, The number of physical resource blocks (PRBs) occupied by at least a portion of the signals in the synchronization signal block is N, where N is an integer greater than 1; N is related to the first threshold and / or the subcarrier spacing.

4. The method according to claim 3, wherein, Includes one or more of the following: When the subcarrier spacing used in the synchronization signal block is 30kHz and the first threshold is 6MHz, N is less than or equal to 15; When the subcarrier spacing used in the synchronization signal block is 30kHz and the first threshold is 5MHz, N is less than or equal to 13; When the subcarrier spacing used in the synchronization signal block is 30kHz and the first threshold is 3MHz, N is less than or equal to 8; When the subcarrier spacing used in the synchronization signal block is 15kHz and the first threshold is 3MHz, N is less than or equal to 15; When the subcarrier spacing used in the synchronization signal block is 15 kHz and the first threshold is 2 MHz, N is less than or equal to 11.

5. The method according to any one of claims 1-4, wherein, The at least part of the signal includes the master synchronization signal; The N PRBs occupied by the main synchronization signal include the subcarriers occupied by the main synchronization signal and the guard intervals on both sides of the main synchronization signal in the frequency domain.

6. The method according to claim 5, wherein, The at least part of the signal also includes an auxiliary synchronization signal; The N PRBs occupied by the auxiliary synchronization signal include the subcarriers occupied by the auxiliary synchronization signal and the guard intervals on both sides of the frequency domain of the auxiliary synchronization signal.

7. The method according to claim 5 or 6, wherein, The number of subcarriers occupied by the primary synchronization signal and / or the number of subcarriers occupied by the secondary synchronization signal are any parameters in the first parameter set.

8. The method according to claim 7, wherein, The parameters in the first parameter set are prime numbers.

9. The method according to any one of claims 5-8, wherein, The number of subcarriers occupied by the primary synchronization signal is greater than or equal to the number of subcarriers occupied by the secondary synchronization signal.

10. The method according to any one of claims 5-9, wherein, The primary synchronization signal occupies one or more time-domain symbols; and / or, The auxiliary synchronization signal occupies one or more time domain symbols.

11. The method according to any one of claims 5-10, wherein, The signal at least part also includes a main information block; the main information block occupies N PRBs and multiple time-domain symbols.

12. The method according to claim 11, wherein, On one or more time-domain symbols occupied by the secondary synchronization signal, the main information block and the secondary synchronization signal are frequency-division multiplexed, or the one or more time-domain symbols occupied by the secondary synchronization signal are not used to transmit the main information block.

13. The method according to claim 11 or 12, wherein, The multiple time-domain symbols occupied by the main information block are all located after one or more time-domain symbols occupied by the auxiliary synchronization signal.

14. The method according to claim 11 or 12, wherein, At least one time-domain symbol among the multiple time-domain symbols occupied by the main information block is located between one or more time-domain symbols occupied by the main synchronization signal and one or more time-domain symbols occupied by the auxiliary synchronization signal; The remaining time-domain symbols among the multiple time-domain symbols occupied by the main information block are located after one or more time-domain symbols occupied by the auxiliary synchronization signal.

15. The method according to claim 13 or 14, wherein, Among the multiple time-domain symbols occupied by the main information block, the multiple time-domain symbols that follow the time-domain symbols occupied by the auxiliary synchronization signal are consecutive in the time domain; or, Among the multiple time-domain symbols occupied by the main information block, the first part of the time-domain symbols and the second part of the time-domain symbols are spaced apart by a first number of time-domain symbols.

16. The method according to any one of claims 13-15, wherein, Among the multiple time-domain symbols occupied by the main information block, the multiple time-domain symbols located after the time-domain symbols occupied by the auxiliary synchronization signal are continuous in the time domain with one or more time-domain symbols occupied by the auxiliary synchronization signal; or, Among the multiple time-domain symbols occupied by the main information block, the multiple time-domain symbols located after the time-domain symbols occupied by the auxiliary synchronization signal are spaced apart from one or more time-domain symbols occupied by the auxiliary synchronization signal by a second number of time-domain symbols in the time domain.

17. The method according to any one of claims 5-10, wherein, The synchronization signal block further includes a main information block, the bandwidth of which is greater than the first threshold.

18. The method according to claim 17, wherein, The main information block includes a first main information block and a second main information block; The first main information block occupies the same N PRBs as the main synchronization signal and / or the auxiliary synchronization signal; The PRB occupied by the second main information block is located in other PRBs outside of the N PRBs.

19. The method according to claim 18, wherein, The first main information block occupies multiple time-domain symbols; At least one time-domain symbol among the multiple time-domain symbols occupied by the first main information block is located between one or more time-domain symbols occupied by the main synchronization signal and one or more time-domain symbols occupied by the auxiliary synchronization signal, and the remaining time-domain symbols among the multiple time-domain symbols occupied by the first main information block are located after one or more time-domain symbols occupied by the auxiliary synchronization signal. or, The multiple time-domain symbols occupied by the first main information block are all located after one or more time-domain symbols occupied by the auxiliary synchronization signal.

20. The method according to claim 18 or 19, wherein, The second main information block is frequency-division multiplexed with one or more of the main synchronization signal, the auxiliary synchronization signal, and the first main information block.

21. The method according to any one of claims 18-30, wherein, The information carried by the first main information block is the same as the information carried by the second main information block.

22. The method according to any one of claims 18-21, wherein, When the terminal device performs data transmission and reception based on the first capability, the terminal device obtains the information carried in the main information block based on the first main information block; When the terminal device transmits and receives data based on the second capability, the terminal device obtains the information carried in the main information block based on the first main information block and the second main information block; The second capability is greater than the first capability.

23. The method according to any one of claims 18-22, wherein, The cyclic redundancy version of the first main information block is different from the cyclic tolerance version of the second main information block.

24. The method according to any one of claims 18-23, wherein, The number of synchronization signal blocks includes multiple blocks; The cyclic redundancy version of the first main information block in the first synchronization signal block is the same as the cyclic redundancy version of the second main information block in the second synchronization signal block. And / or, The cyclic redundancy version of the second main information block in the first synchronization signal block is the same as the cyclic redundancy version of the first main information block in the second synchronization signal block. The first synchronization signal block and the second synchronization signal block are two synchronization signal blocks that are adjacent in the time domain.

25. The method according to claim 24, wherein, The time-domain position of the first synchronization signal block is continuous with the time-domain position of the second synchronization signal block in the time domain.

26. The method according to claim 24, wherein, The time-domain position of the first synchronization signal block is spaced apart from the time-domain position of the second synchronization signal block by a third number of time units.

27. A signal transmission method, the method comprising: The network device sends a synchronization signal block, wherein the bandwidth of at least a portion of the signals in the synchronization signal block is less than or equal to a first threshold. The first threshold is related to the subcarrier spacing used by the synchronization signal block.

28. The method according to claim 27, wherein, When the subcarrier spacing used in the synchronization signal block is 30kHz, the first threshold is any one of 6MHz, 5MHz, and 3MHz; When the subcarrier spacing used in the synchronization signal block is 15 kHz, the first threshold is 3 MHz or 2 MHz.

29. The method according to claim 27 or 28, wherein, The number of physical resource blocks (PRBs) occupied by at least a portion of the signals in the synchronization signal block is N, where N is an integer greater than 1; N is related to the first threshold and / or the subcarrier spacing.

30. The method according to claim 29, wherein, Includes one or more of the following: When the subcarrier spacing used in the synchronization signal block is 30kHz and the first threshold is 6MHz, N is less than or equal to 15; When the subcarrier spacing used in the synchronization signal block is 30kHz and the first threshold is 5MHz, N is less than or equal to 13; When the subcarrier spacing used in the synchronization signal block is 30kHz and the first threshold is 3MHz, N is less than or equal to 8; When the subcarrier spacing used in the synchronization signal block is 15kHz and the first threshold is 3MHz, N is less than or equal to 15; When the subcarrier spacing used in the synchronization signal block is 15 kHz and the first threshold is 2 MHz, N is less than or equal to 11.

31. The method according to any one of claims 27-30, wherein, The at least part of the signal includes the master synchronization signal; The N PRBs occupied by the main synchronization signal include the subcarriers occupied by the main synchronization signal and the guard intervals on both sides of the main synchronization signal in the frequency domain.

32. The method according to claim 31, wherein, The at least part of the signal also includes an auxiliary synchronization signal; The N PRBs occupied by the auxiliary synchronization signal include the subcarriers occupied by the auxiliary synchronization signal and the guard intervals on both sides of the frequency domain of the auxiliary synchronization signal.

33. The method according to claim 31 or 32, wherein, The number of subcarriers occupied by the primary synchronization signal and / or the number of subcarriers occupied by the secondary synchronization signal are any parameters in the first parameter set.

34. The method according to claim 33, wherein, The parameters in the first parameter set are prime numbers.

35. The method according to any one of claims 31-34, wherein, The number of subcarriers occupied by the primary synchronization signal is greater than or equal to the number of subcarriers occupied by the secondary synchronization signal.

36. The method according to any one of claims 31-35, wherein, The primary synchronization signal occupies one or more time-domain symbols; and / or, The auxiliary synchronization signal occupies one or more time domain symbols.

37. The method according to any one of claims 31-36, wherein, The signal at least part also includes a main information block; the main information block occupies N PRBs and multiple time-domain symbols.

38. The method according to claim 37, wherein, On one or more time-domain symbols occupied by the secondary synchronization signal, the main information block and the secondary synchronization signal are frequency-division multiplexed, or the one or more time-domain symbols occupied by the secondary synchronization signal are not used to transmit the main information block.

39. The method according to claim 37 or 38, wherein, The multiple time-domain symbols occupied by the main information block are all located after one or more time-domain symbols occupied by the auxiliary synchronization signal.

40. The method according to claim 38 or 39, wherein, At least one time-domain symbol among the multiple time-domain symbols occupied by the main information block is located between one or more time-domain symbols occupied by the main synchronization signal and one or more time-domain symbols occupied by the auxiliary synchronization signal; The remaining time-domain symbols among the multiple time-domain symbols occupied by the main information block are located after one or more time-domain symbols occupied by the auxiliary synchronization signal.

41. The method according to claim 39 or 40, wherein, Among the multiple time-domain symbols occupied by the main information block, the multiple time-domain symbols that follow the time-domain symbols occupied by the auxiliary synchronization signal are consecutive in the time domain; or, Among the multiple time-domain symbols occupied by the main information block, the first part of the time-domain symbols and the second part of the time-domain symbols are spaced apart by a first number of time-domain symbols.

42. The method according to any one of claims 39-41, wherein, Among the multiple time-domain symbols occupied by the main information block, the multiple time-domain symbols located after the time-domain symbols occupied by the auxiliary synchronization signal are continuous in the time domain with one or more time-domain symbols occupied by the auxiliary synchronization signal; or, Among the multiple time-domain symbols occupied by the main information block, the multiple time-domain symbols located after the time-domain symbols occupied by the auxiliary synchronization signal are spaced apart from one or more time-domain symbols occupied by the auxiliary synchronization signal by a second number of time-domain symbols in the time domain.

43. The method according to any one of claims 31-36, wherein, The bandwidth of the main information block is greater than the first threshold.

44. The method according to claim 43, wherein, The main information block includes a first main information block and a second main information block; The first main information block occupies the same N PRBs as the main synchronization signal and / or the auxiliary synchronization signal; The PRB occupied by the second main information block is located in other PRBs outside of the N PRBs.

45. The method according to claim 44, wherein, The first main information block occupies multiple time-domain symbols; At least one time-domain symbol among the multiple time-domain symbols occupied by the first main information block is located between one or more time-domain symbols occupied by the main synchronization signal and one or more time-domain symbols occupied by the auxiliary synchronization signal, and the remaining time-domain symbols among the multiple time-domain symbols occupied by the first main information block are located after one or more time-domain symbols occupied by the auxiliary synchronization signal. or, The multiple time-domain symbols occupied by the first main information block are all located after one or more time-domain symbols occupied by the auxiliary synchronization signal.

46. ​​The method according to claim 44 or 45, wherein, The second main information block is frequency-division multiplexed with one or more of the main synchronization signal, the auxiliary synchronization signal, and the first main information block.

47. The method according to any one of claims 44-46, wherein, The information carried by the first main information block is the same as the information carried by the second main information block.

48. The method according to any one of claims 47-47, wherein, The first main information block is used by the terminal device with the first capability to obtain the information carried in the main information block; The first main information block and the second main information block are used by the terminal device with the second capability to obtain the information carried in the main information block; The second capability is greater than the first capability.

49. The method according to any one of claims 44-48, wherein, The cyclic redundancy version of the first main information block is different from the cyclic tolerance version of the second main information block.

50. The method according to any one of claims 44-49, wherein, The number of synchronization signal blocks includes multiple blocks; The cyclic redundancy version of the first main information block in the first synchronization signal block is the same as the cyclic redundancy version of the second main information block in the second synchronization signal block. And / or, The cyclic redundancy version of the second main information block in the first synchronization signal block is the same as the cyclic redundancy version of the first main information block in the second synchronization signal block. The first synchronization signal block and the second synchronization signal block are two synchronization signal blocks that are adjacent in the time domain.

51. The method according to claim 50, wherein, The time-domain position of the first synchronization signal block is continuous with the time-domain position of the second synchronization signal block in the time domain.

52. The method according to claim 50, wherein, The time-domain position of the first synchronization signal block is spaced apart from the time-domain position of the second synchronization signal block by a third number of time units.

53. A signal receiving device, applied to a terminal device, the device comprising: The first communication unit is configured to receive a synchronization signal block, wherein the bandwidth of at least a portion of the signals in the synchronization signal block is less than or equal to a first threshold. The first threshold is related to the subcarrier spacing used by the synchronization signal block.

54. A signal transmitting device, applied to a network device, the device comprising: The second communication unit is configured to transmit a synchronization signal block, wherein the bandwidth of at least a portion of the signals in the synchronization signal block is less than or equal to a first threshold. The first threshold is related to the subcarrier spacing used by the synchronization signal block.

55. A communication device, the communication device comprising: Memory, used to store computer programs; A processor, connected to the memory, is configured to retrieve and run the computer program from the memory to implement the method of any one of claims 1 to 26, or to implement the method of any one of claims 27 to 52; A transceiver is used to receive and send information when exchanging information with other external devices.

56. A chip, the chip comprising: Memory, used to store computer programs; A processor, connected to the memory, is configured to retrieve and run a computer program from the memory, causing a device on which the chip is mounted to perform the method as described in any one of claims 1 to 26, or to perform the method as described in any one of claims 27 to 52; A transceiver is used to receive and send information during the exchange of information with a device or chip.

57. 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 26, or implements the method as claimed in any one of claims 27 to 52.

58. A computer program product comprising a computer program or instructions which, when executed by a processor, implement the steps of the method as claimed in any one of claims 1 to 26; or implement the steps of the method as claimed in any one of claims 27 to 52.

59. A computer program that, when executed, causes a computer to perform the method as described in any one of claims 1 to 26, or to implement the method as described in any one of claims 27 to 52.

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