SSB transmission method and apparatus, and communication device and storage medium

Abstract

The present application belongs to the technical field of wireless communications. Disclosed are an SSB transmission method and apparatus, and a communication device and a storage medium. The SSB transmission method in the embodiments of the present application comprises: a first device using a first bandwidth to send an SSB, wherein the first bandwidth is greater than or equal to a preset bandwidth, and the preset bandwidth is an initial receiving bandwidth used by a second device receiving the SSB.

Description

SSB transmission method, device, communication equipment and storage medium

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202311794187.2 filed in China on December 22, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of wireless communication technology, and specifically relates to an SSB transmission method, apparatus, communication equipment and storage medium. Background Art

[0004] In the related art, the cellular network system mainly adopts a fixed bandwidth for the transmission of the synchronization signal block (Synchronization Signal and PBCH block, SSB), that is, the transmitting end adopts a fixed bandwidth to send the SSB, and the receiving end adopts a fixed bandwidth to receive the SSB, which makes it impossible for the network side equipment to obtain more reliable transmission performance by applying a larger bandwidth. Summary of the Invention

[0005] The embodiments of the present application provide an SSB transmission method, apparatus, communication equipment, and storage medium, which can solve the problem in related technologies that SSB uses fixed bandwidth transmission, resulting in an inability to obtain more reliable transmission performance by applying a larger bandwidth.

[0006] In a first aspect, a SSB transmission method is provided, including:

[0007] The first device uses a first bandwidth to send an SSB, where the first bandwidth is greater than or equal to a preset bandwidth, and the preset bandwidth is an initial receiving bandwidth used by a second device that receives the SSB.

[0008] In a second aspect, a SSB transmission method is provided, including:

[0009] The second device receives the SSB using a preset bandwidth, where the preset bandwidth is less than or equal to a first bandwidth, and the first bandwidth is a bandwidth used by the first device to send the SSB.

[0010] In a third aspect, an SSB transmission device is provided, including:

[0011] The first sending module is used to send SSB using a first bandwidth, where the first bandwidth is greater than or equal to a preset bandwidth, and the preset bandwidth is an initial receiving bandwidth used by a second device receiving the SSB.

[0012] In a fourth aspect, an SSB transmission device is provided, including:

[0013] The first receiving module is used to receive the SSB using a preset bandwidth, where the preset bandwidth is less than or equal to a first bandwidth, and the first bandwidth is a bandwidth used by the first device to send the SSB.

[0014] In a fifth aspect, a communication device is provided, which terminal includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the steps of the method described in the first aspect or the geothermal aspect are implemented.

[0015] In the sixth aspect, a communication device is provided, comprising a processor and a communication interface, wherein the communication interface is used to send SSB using a first bandwidth, the first bandwidth is greater than or equal to a preset bandwidth, and the preset bandwidth is the initial receiving bandwidth used by a second device receiving the SSB.

[0016] In the seventh aspect, a communication device is provided, including a processor and a communication interface, wherein the communication interface is used to receive SSB using a preset bandwidth, the preset bandwidth is less than or equal to a first bandwidth, and the first bandwidth is the bandwidth used by the first device to send the SSB.

[0017] In an eighth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0018] In a ninth aspect, a wireless communication system is provided, comprising: a first device and a second device, wherein the first device can be used to execute the steps of the method described in the first aspect, and the second device can be used to execute the steps of the method described in the second aspect.

[0019] In the tenth aspect, a chip is provided, which includes a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0020] In the eleventh aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the method described in the first aspect or the second aspect.

[0021] In an embodiment of the present application, the SSB transmitter transmits the SSB using a first bandwidth greater than or equal to a preset bandwidth. The preset bandwidth is the initial reception bandwidth used by the SSB receiver, thereby achieving more reliable transmission performance by applying a larger bandwidth. The SSB receiver receives the SSB using the preset bandwidth, thereby avoiding the additional complexity of cell search caused by the variable bandwidth, reducing the complexity of the cell search performed by the SSB receiver, and improving the performance of the SSB receiver in receiving the SSB. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a block diagram of a wireless communication system applicable to embodiments of the present application;

[0023] FIG2 is a schematic diagram of the structure of a synchronization signal block;

[0024] FIG3 is a waveform diagram of an on-off keying signal;

[0025] FIG4 is a schematic diagram of the OOK-1 waveform of a low-power signal;

[0026] FIG5 is a schematic diagram of the OOK-4 waveform of a low-power signal;

[0027] FIG6 is a schematic diagram of the receiving characteristics of the OOK / ASK signal;

[0028] FIG7 is a schematic diagram of a transmission method of two parts of SSB according to an embodiment of the present application;

[0029] FIG8 is a flow chart of an SSB transmission method according to an embodiment of the present application;

[0030] FIG9 is a schematic diagram of the transmission bandwidth and reception bandwidth of a low-power signal according to an embodiment of the present application;

[0031] FIG10 is a second flow chart of the SSB transmission method according to an embodiment of the present application;

[0032] FIG11 is a third flow chart of the SSB transmission method according to an embodiment of the present application;

[0033] FIG12 is a fourth flow chart of the SSB transmission method according to an embodiment of the present application;

[0034] FIG13 is a schematic diagram showing an embodiment of the present application in which the bandwidth of the receiving end is less than or equal to the bandwidth of the transmitting end;

[0035] FIG14 is a schematic diagram showing an embodiment of the present application in which the bandwidth of the receiving end is greater than or equal to the bandwidth of the transmitting end;

[0036] FIG15 is a schematic diagram of a structure of an SSB transmission device according to an embodiment of the present application;

[0037] FIG16 is a second structural diagram of the SSB transmission device according to an embodiment of the present application;

[0038] FIG17 is a third structural diagram of the SSB transmission device according to an embodiment of the present application;

[0039] FIG18 is a fourth structural diagram of the SSB transmission device according to an embodiment of the present application;

[0040] FIG19 is a schematic structural diagram of a communication device according to an embodiment of the present application;

[0041] FIG20 is a schematic diagram of the hardware structure of a terminal according to an embodiment of the present application;

[0042] Figure 21 is a schematic diagram of the hardware structure of the network side device of an embodiment of the present application. DETAILED DESCRIPTION

[0043] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0044] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0045] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0046] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th Generation (6G) communication systems.

[0047] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device (Wearable Device), an aircraft (Flight Vehicle), a vehicle-mounted device (VUE), a ship-mounted device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, or other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be called a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (WLAN) access point (AS) or a wireless fidelity (WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home evolved Node B (home evolved Node B), Transmission Reception Point (TRP) or other appropriate terms in the relevant field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0048] The following is a brief description of the relevant technical contents involved in this application.

[0049] 1. Classification and Characteristics of Artificial Intelligence Internet of Things (A-IoT) Devices in the Third Generation Partnership Projects (3GPP)

[0050] In the 3GPP R19 A-IoT research, ambient IoT devices are characterized based on their energy storage capacity and their ability to generate radio frequency signals for transmission. The A-IoT device has one of the following energy storage capabilities:

[0051] Storage Capacity 1: No ability to store energy.

[0052] Storage capacity 2: Energy can be stored up to E1 or E2 joules, where it is possible that E1 = E2.

[0053] Storage capacity3: Energy can be stored up to E2 joules.

[0054] Depending on these storage capacities, the study considered the following categories of ambient IoT devices:

[0055] Device A: No energy storage, no independent signal generation / amplification, i.e. backscatter transmission.

[0056] Device B: has energy storage, no independent signal generation, i.e. backscatter transmission. The use of stored energy may include amplification of the reflected signal.

[0057] Device C: has energy storage and independent signal generation, i.e., active RF components for transmission.

[0058] 2. Fifth-generation mobile communication technology (5th-Generation, 5G NR) synchronization signal and Physical Broadcast Channel (PBCH)

[0059] The wireless device (terminal) obtains the synchronization signal and broadcast signal / channel from the base station cell through the cell search process to synchronize with the base station in the time and frequency domain, and obtains the location of the time and frequency resources of the cell deployed by the base station in the frequency domain and time domain, as well as the physical cell identity (IDentity, ID).

[0060] In 5G, the structure of SSB is shown in Figure 2. SSB includes: Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS) and PBCH.

[0061] The terminal first detects the PSS to obtain a part of the physical cell ID, namely N(2)_ID; obtains the Orthogonal Frequency Division Multiplexing (OFDM) symbol timing and frequency synchronization; then detects the SSS to obtain the other part of the physical cell ID, namely N(1)_ID, and obtains the complete physical cell ID, namely

[0062] Then, the terminal detects the PBCH and demodulates the PBCH reference signal Demodulation Reference Signal (DMRS), obtains the System Frame Number (SFN) number and SSB index, and further obtains the radio frame (subframe) timing.

[0063] The New Radio (NR) waveform is based on the OFDM waveform. The network uses certain parameters such as bandwidth and subcarrier spacing for transmission. The terminal receives SSB when it clearly knows the transmission bandwidth, subcarrier spacing and other parameters of SSB.

[0064] 3. Low power signal waveform

[0065] To reduce the power consumption of low power wake-up radio (LP WUR) and save power, low power signals are usually sent using simple waveforms, such as on-off keying (OOK, as shown in Figure 3) or frequency-shift keying (FSK). Therefore, the terminal can identify low power signals through simple energy detection or frequency detection.

[0066] Currently, two potential low-power signal waveforms include OOK-1 and OOK-4. These waveforms are amplitude-modulated, so all subcarriers are uniformly modulated. This means they do not utilize frequency domain resources.

[0067] As shown in FIG4 , the OOK-1 waveform of the low-power signal has the following characteristics: one OFDM symbol length contains one bit. As shown in FIG4 , the OOK-1 waveform includes one high-level bit.

[0068] As shown in Figure 5, the OOK-4 waveform of a low-power signal is characterized by the fact that one OFDM symbol contains M bits / chips. In Figure 5, M = 4. The OOK-4 waveform in Figure 5 includes four bits: high, low, low, and high (i.e., 1001).

[0069] In fact, it can be understood that the difference between OOK-1 and OOK-4 lies in whether more than one OOK bit can be carried in one OFDM symbol.

[0070] It should be noted that one bit "0" or "1" can be understood as one chip.

[0071] The reception of OOK / Amplitude-Shift Keying (ASK) signals has the following characteristic: if the transmit bandwidth (Tx BW) of the OOK signal on the transmitter side is X, the receive bandwidth (Rx BW) on the receiver side is Y, and X>Y, then the receiver side can still detect the OOK signal, as shown in Figure 6.

[0072] 4. Bandwidth required for AIoT / low-power transmission system deployment

[0073] Different operators may use different bandwidths for deploying AIoT / terminal devices. Generally, protocols specify the minimum SSB bandwidth for AIoT / terminals. However, some operators have more bandwidth available for SSB transmission, so the above restrictions will limit operators with more spectrum resources from using larger SSB transmissions.

[0074] 5. SSB transmission cycle of AIoT / low-power transmission system

[0075] The SSB may contain different signal parts, such as a sequence part and a payload part. The sequence part is mainly used for synchronization and measurement, and the SSB may contain one or more sequence parts. The payload part is used to carry broadcast information bits and may be coded or uncoded; it may be line code coded, wherein the line code coding may be, for example, Manchester, FM0, Miller, or PIE coding; it may be channel coded; and cyclic redundancy check (CRC) bits may be added. The sequence part and the payload part may be transmitted continuously in time and in the same period; or the sequence part and the payload part may be transmitted discontinuously in time and / or in different periods, including the following situations: the sequence part and the payload part may be transmitted discontinuously in time; the sequence part and the payload part may be transmitted in different periods; the sequence part and the payload part may be transmitted discontinuously in time and in different periods, as shown in FIG7 .

[0076] Below, in combination with the accompanying drawings, the SSB transmission method, device, communication equipment and storage medium provided in the embodiments of the present application are described in detail through some embodiments and their application scenarios.

[0077] Referring to FIG. 8 , an embodiment of the present application provides an SSB transmission method, including:

[0078] Step S11: The first device uses a first bandwidth to send an SSB, where the first bandwidth is greater than or equal to a preset bandwidth, and the preset bandwidth is an initial receiving bandwidth used by a second device receiving the SSB.

[0079] Optionally, the preset bandwidth is a bandwidth agreed upon in a protocol.

[0080] The initial receiving bandwidth refers to the receiving bandwidth initially used by the second device. After the second device uses the initial receiving bandwidth to receive SSB, it can also change the receiving bandwidth as needed.

[0081] In an embodiment of the present application, optionally, the first device uses the first bandwidth to send SSB to the second device.

[0082] Optionally, the first device may be a handheld or fixed device that reads or writes information from an Internet of Things (IoT) / low-power device. It may also be understood as a device that communicates with an IoT / low-power device, such as a terminal, a base station, or a device with read / write capabilities, such as a reader / writer, without limitation.

[0083] Optionally, in one possible implementation, the second device may be a tag, i.e., a radio frequency identification (RFID) tag. RFID technology can be divided into three types: active, passive, and semi-active. Passive tags can also be referred to as passive IOT, i.e., passive Internet of Things devices. The communication method of the second device may be backscattered radio frequency (RF) signals for signal transmission, or some active tags may also have the ability to actively generate signals. Because the energy of the second device can come from the environment, such as ambient RF energy, thermal energy, wind energy, kinetic energy, etc., it can also be referred to as ambient IoT (A-IoT). It can also be broadly understood as a terminal, especially a terminal device for low-power communication.

[0084] In an embodiment of the present application, the SSB transmitter uses a first bandwidth greater than or equal to a preset bandwidth to send the SSB, and the preset bandwidth is the initial receiving bandwidth used by the SSB receiver, so that more reliable transmission performance can be obtained by applying a larger bandwidth.

[0085] In an embodiment of the present application, optionally, the first device uses a low-power signal waveform to send the SSB. Optionally, the low-power signal waveform may include an OOK waveform or an ASK waveform. Low-power signal waveforms such as OOK / ASK have the following characteristics: if the transmission bandwidth of the low-power signal on the transmitting side is X, the receiving bandwidth of the receiving end is Y, and X>Y, then the receiving end can still demodulate the low-power signal (as shown in Figure 9, the signal in Figure 9 is an OOK signal. It can be seen from Figure 9 that due to the characteristics of the OOK signal, the receiving end does not need to obtain the OOK signal of the entire transmission bandwidth, but only needs to obtain the OOK signal of part of the transmission bandwidth, and can still parse the content of the OOK signal). This feature enables network operators with more spectrum resources to use a larger bandwidth to transmit SSB, and the receiving end can still search and detect the SSB.

[0086] In some embodiments, optionally, the first bandwidth is M times the preset bandwidth, where M is greater than or equal to 1. By obtaining M, the first bandwidth can be determined based on the preset bandwidth and M. Optionally, M can be agreed upon by a protocol. Furthermore, optionally, M is an integer greater than or equal to 1. In other words, the first bandwidth is an integer multiple of the preset bandwidth, thereby facilitating implementation.

[0087] In some embodiments, the SSB transmission method optionally further includes: the first device selecting the first bandwidth from a preset first bandwidth set. Optionally, the first bandwidth set is agreed upon by a protocol. By agreeing upon the first bandwidth set, the SSB transmitter has a wider range of first bandwidths to choose from, and can select a first bandwidth greater than or equal to the receiving bandwidth for SSB transmission as needed, thereby increasing the SSB transmitter's flexibility in selecting the SSB transmission bandwidth.

[0088] In some embodiments, the SSB transmission method optionally further includes: the first device selecting M from a preset multiples set, determining the first bandwidth based on the selected M and the preset bandwidth, wherein the first bandwidth is M times the preset bandwidth, and M is greater than or equal to 1. Optionally, the multiples set is agreed upon by a protocol. By agreeing on the multiples set, the SSB transmitter has a wider range of choices for M, thereby increasing the flexibility of the SSB transmitter in selecting the SSB transmission bandwidth.

[0089] In some embodiments, optionally, the SSB transmission method further includes: the first device sending indication information, the indication information being used to indicate the first bandwidth or M, the first bandwidth being M times the preset bandwidth, and the M being greater than or equal to 1. Optionally, after the first device uses the first bandwidth to send the SSB, the first device sends the indication information. Optionally, the first device sends the indication information to the second device. Thus, the SSB receiving end can obtain the actual sending bandwidth of the first device, and can receive subsequent signals based on the actual sending bandwidth, thereby improving the reliability of reception.

[0090] In some embodiments, optionally, the indication information is indicated by an SSB, or by system information. Indicating the above indication information by SSB allows the SSB receiver to obtain the above indication information at the same time as obtaining the SSB, which is convenient and quick. In the embodiment of the present application, the system information may be information sent independently of the SSB, or it may be system information carried by the SSB, and this application does not limit this. The system information is, for example, a master information block (MIB) or a system information block (SIB).

[0091] In some embodiments, optionally, the indication information includes one of the following through an SSB indication:

[0092] The indication information is indicated by a synchronization sequence in the SSB;

[0093] The indication information is indicated by an information bit (payload part) of a physical broadcast channel (PBCH) in the SSB;

[0094] The indication information is indicated by scrambling a cyclic redundancy check (CRC) of information bits of a physical broadcast channel in the SSB.

[0095] It should be noted that the above-mentioned SSB indication can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of the content of the indication information in the indication sent; an indirect indication can be understood as the receiver determining the corresponding indication information based on the indication sent by the sender.

[0096] In some embodiments, optionally, the SSB includes at least one of a synchronization sequence and a physical broadcast channel.

[0097] In some embodiments, the synchronization sequence and the physical broadcast channel may optionally be time-continuous and transmitted with the same period.

[0098] In some embodiments, optionally, the first device sending the SSB using the first bandwidth includes: the first device sending the synchronization sequence and the physical broadcast channel using different periods, thereby making the sending method more flexible.

[0099] In some embodiments, optionally, the SSB transmission method further includes: the first device sending at least one of the following using the first bandwidth:

[0100] control channel;

[0101] Data channel;

[0102] Measurement signal: The measurement signal may include, for example, at least one of the following: a measurement reference signal and a demodulation reference signal.

[0103] Optionally, the first device transmits the above-mentioned signal using a low-power signal waveform. Optionally, the low-power signal waveform includes an OOK waveform or an ASK waveform. In other words, the first device transmits SSB and other signals using a unified first bandwidth, and the receiving end can demodulate the low-power signal without changing the transmission bandwidth.

[0104] In some embodiments, optionally, the SSB transmission method further includes:

[0105] The first device receives capability information of the second device, where the capability information includes a receiving bandwidth capability of the second device;

[0106] The first device determines the first bandwidth according to a receiving bandwidth capability of the second device.

[0107] In the embodiment of the present application, the first device determines the first bandwidth according to the receiving bandwidth capability of the second device, which can improve the receiving performance of the second device.

[0108] Referring to FIG. 10 , an embodiment of the present application further provides an SSB transmission method, including:

[0109] Step S21: The second device receives the SSB using a preset bandwidth, where the preset bandwidth is less than or equal to a first bandwidth, and the first bandwidth is the bandwidth used by the first device to send the SSB.

[0110] Optionally, the preset bandwidth is a bandwidth agreed upon in a protocol.

[0111] Optionally, the first device may be a handheld or fixed device that reads or writes information from an Internet of Things (IoT) / low-power device. It may also be understood as a device that communicates with an IoT / low-power device, such as a terminal, a base station, or a device with read / write capabilities, such as a reader / writer, without limitation.

[0112] Optionally, in one possible implementation, the second device may be a tag, i.e., a radio frequency identification (RFID) tag. RFID technology can be divided into three types: active, passive, and semi-active. Passive tags can also be referred to as passive IOT, i.e., passive Internet of Things devices. The communication method of the second device may be backscattered radio frequency (RF) signals for signal transmission, or some active tags may also have the ability to actively generate signals. Because the energy of the second device can come from the environment, such as ambient RF energy, thermal energy, wind energy, kinetic energy, etc., it can also be referred to as ambient IoT (A-IoT). It can also be broadly understood as a terminal, especially a terminal device for low-power communication.

[0113] In an embodiment of the present application, the SSB receiving end uses a preset bandwidth to receive the SSB, and the preset bandwidth is less than or equal to the first bandwidth. The first bandwidth is the bandwidth used by the first device to send the SSB, so that the receiving end can use a preset bandwidth to receive the signal without increasing the complexity of the receiver without knowing the actual sending bandwidth of the low-power signal. The receiving end can still receive the SSB, reduce the reception complexity of the SSB, and improve the transmission performance of the downlink channel.

[0114] In an embodiment of the present application, optionally, the first device uses a low-power signal waveform to send the SSB. Optionally, the low-power signal waveform may include an OOK waveform or an ASK waveform. Low-power signal waveforms such as OOK / ASK have the following characteristics: if the transmission bandwidth of the low-power signal on the transmitting side is X, the receiving bandwidth of the receiving end is Y, and X>Y, then the receiving end can still demodulate the low-power signal (for example, using envelope detection or amplitude / power detection methods, when the receiving bandwidth is less than the transmitting bandwidth, the OOK / ASK waveform can still be detected). This feature allows network operators with more spectrum resources to use a larger bandwidth for SSB transmission, and the receiving end can still search and detect the SSB.

[0115] In some embodiments, optionally, the first bandwidth is M times the preset bandwidth, where M is greater than or equal to 1. By obtaining M, the first bandwidth can be determined based on the preset bandwidth and M. Optionally, M can be agreed upon by a protocol. Furthermore, optionally, M is an integer greater than or equal to 1. In other words, the first bandwidth is an integer multiple of the preset bandwidth, thereby facilitating implementation.

[0116] In some embodiments, the SSB transmission method optionally further includes: the second device receiving indication information, the indication information being used to indicate the first bandwidth or M, where the first bandwidth is M times the preset bandwidth, and M is greater than or equal to 1. Optionally, the second device receives the indication information sent by the first device. This allows the SSB receiving end to obtain the actual transmission bandwidth of the first device and receive subsequent signals based on the actual transmission bandwidth, thereby improving reception reliability.

[0117] In some embodiments, optionally, the indication information is indicated by an SSB, or by system information. Indicating the above indication information by SSB allows the SSB receiver to obtain the above indication information at the same time as obtaining the SSB, which is convenient and quick. In the embodiment of the present application, the system information may be information sent independently of the SSB, or it may be system information carried by the SSB, and this application does not limit this. The system information is, for example, a master information block (MIB) or a system information block (SIB).

[0118] In some embodiments, optionally, the indication information includes one of the following through an SSB indication:

[0119] The indication information is indicated by a synchronization sequence in the SSB;

[0120] The indication information is indicated by an information bit of a physical broadcast channel (PBCH) in the SSB;

[0121] The indication information is indicated by scrambling a cyclic redundancy check (CRC) of information bits of a physical broadcast channel in the SSB.

[0122] It should be noted that the above-mentioned SSB indication can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of the content of the indication information in the indication sent; an indirect indication can be understood as the receiver determining the corresponding indication information based on the indication sent by the sender.

[0123] In some embodiments, optionally, the SSB includes at least one of a synchronization sequence and a physical broadcast channel.

[0124] In some embodiments, the synchronization sequence and the physical broadcast channel may optionally be time-continuous and transmitted with the same period.

[0125] In some embodiments, optionally, the synchronization sequence and the physical broadcast channel may be time-non-continuous. Further optionally, the synchronization sequence and the physical broadcast channel may be transmitted with different periods.

[0126] In some embodiments, optionally, the second device receives the indication information, which further includes: the second device receives at least one of the following information using the first bandwidth:

[0127] SSB;

[0128] Physical broadcast channel;

[0129] control channel;

[0130] Data channel;

[0131] Measurement signal: The measurement signal may include, for example, at least one of the following: a measurement reference signal and a demodulation reference signal.

[0132] For example, assuming that the first bandwidth is indicated in the synchronization sequence, the receiving end receives the synchronization sequence but has not received the physical broadcast channel, the receiving end can learn the first bandwidth and use the first bandwidth to receive the physical broadcast channel.

[0133] Receiving the above signal through the first bandwidth can improve the receiving performance of the second device. Of course, it should be noted that the second device needs to have a receiving bandwidth capability that can support the first bandwidth.

[0134] Secondary devices with different bandwidth capabilities may exhibit varying reception qualities, resulting in some differences in reception performance. For example, a device with only a preset bandwidth may require multiple SSB or measurement signal receptions due to its limited bandwidth, resulting in longer synchronization, reselection, or handover times. On the other hand, a device with a wider bandwidth can meet measurement performance requirements with fewer receptions, resulting in shorter synchronization, reselection, or handover times.

[0135] In some embodiments, optionally, the SSB transmission method further includes: the second device determining a reception index based on at least one of the first bandwidth and the preset bandwidth.

[0136] In some embodiments, optionally, the reception indicator includes at least one of the following:

[0137] Measurement accuracy indicators;

[0138] measurement and evaluation cycles;

[0139] Measurement result reporting cycle;

[0140] The number of measurements per unit period.

[0141] In some embodiments, optionally, the SSB transmission method further includes: the second device reporting capability information of the second device, the capability information including the receiving bandwidth capability of the second device.

[0142] In the embodiment of the present application, the first device can determine the first bandwidth according to the receiving bandwidth capability of the second device and use a reasonable bandwidth for transmission.

[0143] Optionally, the receiving bandwidth capability may include at least one of the following: a supported bandwidth size, and a set of supported receiving bandwidths.

[0144] For low-power signals such as OOK signals, the transmission bandwidth of SSB may affect the signals of other communication systems (such as NR) at adjacent frequencies.

[0145] In order to reduce the impact of low-power signals on signals of other communication systems at adjacent frequencies, referring to FIG11 , an embodiment of the present application further provides an SSB transmission method, including:

[0146] Step S31: The first device sends SSB using a first bandwidth, where the first bandwidth is less than or equal to a preset bandwidth.

[0147] Optionally, the preset bandwidth is a bandwidth agreed upon in a protocol.

[0148] In an embodiment of the present application, optionally, the first device uses the first bandwidth to send SSB to the second device.

[0149] Optionally, the first device may be a handheld or fixed device that reads or writes information from an Internet of Things (IoT) / low-power device. It may also be understood as a device that communicates with an IoT / low-power device, such as a terminal, a base station, or a device with read / write capabilities, such as a reader / writer, without limitation.

[0150] Optionally, in one possible implementation, the second device may be a tag, i.e., a radio frequency identification (RFID) tag. RFID technology can be divided into three types: active, passive, and semi-active. Passive tags can also be referred to as passive IOT, i.e., passive Internet of Things devices. The communication method of the second device may be backscattered radio frequency (RF) signals for signal transmission, or some active tags may also have the ability to actively generate signals. Because the energy of the second device can come from the environment, such as ambient RF energy, thermal energy, wind energy, kinetic energy, etc., it can also be referred to as ambient IoT (A-IoT). It can also be broadly understood as a terminal, especially a terminal device for low-power communication.

[0151] In an embodiment of the present application, the transmission bandwidth of the SSB sent by the transmitting end may be smaller than the receiving bandwidth of the receiving end, and the receiving end can still detect the SSB, thereby reducing the impact on the signals of other communication systems with adjacent frequencies.

[0152] In some embodiments, the SSB transmission method optionally further includes: the first device selecting the first bandwidth from a preset first bandwidth set. Optionally, the first bandwidth set is agreed upon by a protocol. By agreeing upon the first bandwidth set, the SSB transmitter has a wider range of first bandwidths to choose from, and can select a first bandwidth greater than or equal to the receiving bandwidth for SSB transmission as needed, thereby increasing the SSB transmitter's flexibility in selecting the SSB transmission bandwidth.

[0153] In some embodiments, the SSB transmission method optionally further includes: the first device sending indication information, the indication information being used to indicate the first bandwidth. Optionally, after the first device transmits the SSB using the first bandwidth, the first device sends the indication information. Optionally, the first device sends the indication information to the second device. This allows the SSB receiver to obtain the actual transmission bandwidth of the first device and receive subsequent signals based on the actual transmission bandwidth, thereby improving reception reliability.

[0154] In some embodiments, optionally, the indication information is indicated by an SSB, or by system information. Indicating the above indication information by SSB allows the SSB receiver to obtain the above indication information at the same time as obtaining the SSB, which is convenient and quick. In the embodiment of the present application, the system information may be information sent independently of the SSB, or it may be system information carried by the SSB, and this application does not limit this. The system information is, for example, a master information block (MIB) or a system information block (SIB).

[0155] In some embodiments, optionally, the indication information includes one of the following through an SSB indication:

[0156] The indication information is indicated by a synchronization sequence in the SSB;

[0157] The indication information is indicated by an information bit (payload part) of a physical broadcast channel (PBCH) in the SSB;

[0158] The indication information is indicated by scrambling a cyclic redundancy check (CRC) of information bits of a physical broadcast channel in the SSB.

[0159] It should be noted that the above-mentioned SSB indication can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of the content of the indication information in the indication sent; an indirect indication can be understood as the receiver determining the corresponding indication information based on the indication sent by the sender.

[0160] In some embodiments, optionally, the SSB includes at least one of a synchronization sequence and a physical broadcast channel.

[0161] In some embodiments, the synchronization sequence and the physical broadcast channel may optionally be time-continuous and transmitted with the same period.

[0162] In some embodiments, optionally, the first device sending the SSB using the first bandwidth includes: the first device sending the synchronization sequence and the physical broadcast channel using different periods, thereby making the sending method more flexible.

[0163] In some embodiments, after the first device sends the indication information, the method further includes: the first device receives, using the first bandwidth, a signal sent by the second device. In other words, after learning the transmission bandwidth of the first device, the second device can use the same bandwidth to send signals to the first device, thereby improving the reception performance of the first device.

[0164] In some embodiments, optionally, the SSB transmission method further includes: the first device sending at least one of the following using the first bandwidth:

[0165] control channel;

[0166] Data channel;

[0167] Measurement signal: The measurement signal may include, for example, at least one of the following: a measurement reference signal and a demodulation reference signal.

[0168] In the embodiment of the present application, optionally, the first device transmits the SSB using a low-power signal waveform. Optionally, the low-power signal waveform may include an OOK waveform or an ASK waveform.

[0169] Referring to FIG. 12 , an embodiment of the present application provides an SSB transmission method, including:

[0170] Step S41: The second device receives the SSB using a preset bandwidth, where the preset bandwidth is greater than or equal to a first bandwidth, and the first bandwidth is the bandwidth used by the first device to send the SSB.

[0171] Optionally, the preset bandwidth is a bandwidth agreed upon in a protocol.

[0172] In an embodiment of the present application, optionally, the first device uses the first bandwidth to send SSB to the second device.

[0173] Optionally, the first device may be a handheld or fixed device that reads or writes information from an Internet of Things (IoT) / low-power device. It may also be understood as a device that communicates with an IoT / low-power device, such as a terminal, a base station, or a device with read / write capabilities, such as a reader / writer, without limitation.

[0174] Optionally, in one possible implementation, the second device may be a tag, i.e., a radio frequency identification (RFID) tag. RFID technology can be divided into three types: active, passive, and semi-active. Passive tags can also be referred to as passive IOT, i.e., passive Internet of Things devices. The communication method of the second device may be backscattered radio frequency (RF) signals for signal transmission, or some active tags may also have the ability to actively generate signals. Because the energy of the second device can come from the environment, such as ambient RF energy, thermal energy, wind energy, kinetic energy, etc., it can also be referred to as ambient IoT (A-IoT). It can also be broadly understood as a terminal, especially a terminal device for low-power communication.

[0175] In an embodiment of the present application, the transmission bandwidth of the SSB sent by the transmitting end may be smaller than the receiving bandwidth of the receiving end, and the receiving end can still detect the SSB, thereby reducing the impact on the signals of other communication systems with adjacent frequencies.

[0176] In some embodiments, the SSB transmission method optionally further includes: the second device receiving indication information indicating the first bandwidth. Optionally, the second device receives the indication information sent by the first device. This allows the SSB receiver to obtain the actual transmission bandwidth of the first device and receive subsequent signals based on the actual transmission bandwidth, thereby improving reception reliability.

[0177] In some embodiments, optionally, the indication information is indicated by an SSB, or by system information. Indicating the above indication information by SSB allows the SSB receiver to obtain the above indication information at the same time as obtaining the SSB, which is convenient and quick. In the embodiment of the present application, the system information may be information sent independently of the SSB, or it may be system information carried by the SSB, and this application does not limit this. The system information is, for example, a master information block (MIB) or a system information block (SIB).

[0178] In some embodiments, optionally, the indication information includes one of the following through an SSB indication:

[0179] The indication information is indicated by a synchronization sequence in the SSB;

[0180] The indication information is indicated by an information bit (payload part) of a physical broadcast channel (PBCH) in the SSB;

[0181] The indication information is indicated by scrambling a cyclic redundancy check (CRC) of information bits of a physical broadcast channel in the SSB.

[0182] It should be noted that the above-mentioned SSB indication can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of the content of the indication information in the indication sent; an indirect indication can be understood as the receiver determining the corresponding indication information based on the indication sent by the sender.

[0183] In some embodiments, optionally, the second device receives the indication information, and then further includes: the second device uses the first bandwidth to send a signal, thereby improving the receiving performance of the first device.

[0184] In some embodiments, optionally, the second device determines a signal sending indicator based on the first bandwidth.

[0185] In some embodiments, optionally, the sending indicator includes at least one of the following:

[0186] In-band emission indicators;

[0187] Adjacent channel leakage ratio indicator;

[0188] Spurious indicators.

[0189] In some embodiments, the SSB is optionally transmitted via a low-power signal waveform. Optionally, the low-power signal waveform may include an OOK waveform or an ASK waveform.

[0190] The following is an example of the SSB transmission method of this application, taken in conjunction with specific application scenarios.

[0191] Example 1 of the present application: variable SSB transmission

[0192] In cellular systems, AIoT or low-power communication systems may deploy different spectrum resources. Due to the characteristics of the OOK / ASK waveform, the transmitter (i.e., the first device) can determine the bandwidth of the SSB transmission based on the available bandwidth. The receiver (i.e., the second device) can use a narrower bandwidth for SSB reception and still demodulate the OOK / ASK signal. For example, using envelope detection and amplitude / power detection methods, the OOK / ASK waveform can still be detected when the receiving bandwidth is smaller than the transmitting bandwidth.

[0193] Referring to Figure 13, the second device uses a preset bandwidth for SSB reception. The bandwidth deployed by the AIoT or low-power transmission system should be greater than or equal to the preset bandwidth. When the second device performs an SSB search without knowing the bandwidth deployed by the first device, it can use the preset bandwidth for SSB reception.

[0194] If the first device uses a larger deployment bandwidth, it can use a larger bandwidth for SSB transmission. At this time, the second device still uses the preset bandwidth for SSB reception. In this case, the second device may only receive part of the SSB transmission bandwidth, but can still detect the signal and information carried in the SSB, as shown in (a) in Figure 13. At this time, even if the second device has a certain frequency offset, the receiving bandwidth is still within the SSB transmission bandwidth, avoiding multiple SSB searches due to frequency offset and reducing the complexity of SSB searches.

[0195] If the first device adopts the minimum bandwidth deployment, that is, adopts the preset bandwidth for SSB transmission, the second device adopts the preset bandwidth reception to match the minimum deployment bandwidth and receive the SSB, as shown in (b) in Figure 13.

[0196] The bandwidth for sending SSB by the first device can be an integer multiple (M times) of the preset bandwidth, and the selection of the SSB bandwidth size or the value of M can come from a preset set, that is, the first device can transmit SSB within a limited bandwidth set.

[0197] Example 2 of the present application: Determining the actual SSB transmission bandwidth

[0198] As described in Example 1, if the first device uses a larger deployment bandwidth, then a larger bandwidth can be used to transmit SSB. At this time, the second device uses the preset bandwidth to receive SSB and can still detect the SSB.

[0199] Since SSB reception is a periodic behavior, it is used for measurement, synchronization, automatic gain control (AGC), etc. After receiving the SSB, the second device can obtain the bandwidth of the first device's actual SSB transmission through the first device's indication information, which can be used to ensure the reliability of subsequent SSB reception.

[0200] Optionally, the indication information is indicated by an SSB, or by system information. Indicating the above indication information by SSB enables the SSB receiving end to obtain the above indication information at the same time as obtaining the SSB, which is convenient and quick. In the embodiment of the present application, the system information may be information sent independently of the SSB, or it may be system information carried by the SSB, and this application does not limit it. The system information is, for example, a master information block (MIB) or a system information block (SIB).

[0201] In some embodiments, optionally, the indication information includes one of the following through an SSB indication:

[0202] The indication information is indicated by a synchronization sequence in the SSB;

[0203] The indication information is indicated by an information bit (payload part) of a physical broadcast channel (PBCH) in the SSB;

[0204] The indication information is indicated by scrambling a cyclic redundancy check (CRC) of information bits of a physical broadcast channel in the SSB.

[0205] After obtaining the SSB transmission bandwidth information, the second device can use a larger bandwidth for subsequent SSB reception.

[0206] If the first device uses the same bandwidth for transmission of other SSB channels, then after receiving the indication information, the second device uses the bandwidth indicated by the indication information to receive at least one of the following information to improve reception performance:

[0207] SSB;

[0208] Physical broadcast channel;

[0209] control channel;

[0210] Data channel;

[0211] Measurement signal: The measurement signal may include, for example, at least one of the following: a measurement reference signal and a demodulation reference signal.

[0212] Example 3 of the present application: Using different radio resource management (RRM) indicators under different bandwidths

[0213] The second device may have different receiving bandwidth capabilities. The second device (AIoT device, low-power terminal device) can report the receiving bandwidth capability. Optionally, the receiving bandwidth capability may include at least one of the following: supported bandwidth size, supported receiving bandwidth set. The preset bandwidth is the receiving capability possessed by all devices, and this capability may not be reported. However, a receiving capability higher than the preset bandwidth can be reported, which is conducive to the subsequent sending device to use a reasonable bandwidth for transmission.

[0214] Secondary devices with different bandwidth capabilities may exhibit varying reception qualities, resulting in some differences in reception performance. For example, a device with only a preset bandwidth may require multiple SSB or measurement signal receptions due to its limited bandwidth, resulting in longer synchronization, reselection, or handover times. On the other hand, a device with a wider bandwidth can meet measurement performance requirements with fewer receptions, resulting in shorter synchronization, reselection, or handover times.

[0215] Optionally, the second device determines an applicable receiving indicator according to its own receiving bandwidth capability, such as a measurement accuracy indicator, a measurement evaluation period, a reporting period, or the number of measurements within a unit period.

[0216] For example, a device with smaller bandwidth capability uses a longer measurement and evaluation cycle, reporting cycle, or requires more measurements per unit cycle; while a device with larger bandwidth capability uses a shorter measurement and evaluation cycle, reporting cycle, or requires fewer measurements per unit cycle.

[0217] Example 4 of the present application: Indication of the sending bandwidth when the sending bandwidth X is less than or equal to the receiving bandwidth Y

[0218] For OOK signals, when the transmission bandwidth is affected by other communication systems (such as NR) with adjacent frequencies, to reduce the impact of OOK signals on NR signals, as shown in Figure 14, the bandwidth of the OOK signal sent by the transmitting device (i.e., the first device) can be less than or equal to the receiving bandwidth of the IoT device or low-power receiving device (i.e., the second device). In this case, the receiving device can still detect the OOK channel, but because the receiving bandwidth is greater than the actual OOK transmission bandwidth, more noise and interference power will be included in the receiving filter, which will lead to a certain decline in reception performance.

[0219] For SSB transmission, the transmission bandwidth X can also be smaller than the preset reception bandwidth Y, i.e., the receive filter bandwidth. After the receiving device completes SSB reception, the sequence portion or payload portion of the SSB can carry information indicating the actual transmission bandwidth X.

[0220] After receiving the indication information, the IoT device or low-power device limits the signal sent to the bandwidth X and determines the transmission indicators that need to be met based on the indicated bandwidth X, such as the in-band emission indicator, the adjacent channel leakage ratio (ACLR) indicator, and the spurious indicator, to avoid the impact of the signal sent by the device on other communication systems with adjacent frequencies.

[0221] The SSB transmission method provided in the embodiment of the present application can be executed by an SSB transmission device. In the embodiment of the present application, the SSB transmission device provided in the embodiment of the present application is described by taking the SSB transmission method executed by the SSB transmission device as an example.

[0222] Referring to FIG. 15 , an embodiment of the present application further provides an SSB transmission device 150 , including:

[0223] The first sending module 151 is used to send SSB using a first bandwidth, where the first bandwidth is greater than or equal to a preset bandwidth, and the preset bandwidth is an initial receiving bandwidth used by a second device receiving the SSB.

[0224] In an embodiment of the present application, the SSB transmitter uses a first bandwidth greater than or equal to a preset bandwidth to send the SSB, and the preset bandwidth is the initial receiving bandwidth used by the SSB receiver, so that more reliable transmission performance can be obtained by applying a larger bandwidth.

[0225] Optionally, the first bandwidth is M times the preset bandwidth, and M is greater than or equal to 1.

[0226] Optionally, the SSB transmission device 150 further includes:

[0227] A first selection module, configured to select the first bandwidth from a preset first bandwidth set;

[0228] or,

[0229] The second selection module is configured to select M from a preset multiple set, and determine the first bandwidth according to the selected M and the preset bandwidth, where the first bandwidth is M times the preset bandwidth, and M is greater than or equal to 1.

[0230] Optionally, the SSB transmission device 150 further includes:

[0231] The second sending module is used to send indication information, where the indication information is used to indicate the first bandwidth or M, where the first bandwidth is M times the preset bandwidth, and M is greater than or equal to 1.

[0232] Optionally, the indication information is indicated through SSB, or through system information.

[0233] Optionally, the indication information includes one of the following through an SSB indication:

[0234] The indication information is indicated by a synchronization sequence in the SSB;

[0235] The indication information is indicated by the information bit of the physical broadcast channel in the SSB;

[0236] The indication information is indicated by scrambling the cyclic redundancy check CRC of the information bits of the physical broadcast channel in the SSB.

[0237] Optionally, the SSB includes at least one of a synchronization sequence and a physical broadcast channel.

[0238] Optionally, the first sending module 151 is configured to send the synchronization sequence and the physical broadcast channel using different periods.

[0239] Optionally, the SSB transmission device 150 further includes:

[0240] A third sending module is configured to send at least one of the following items using the first bandwidth:

[0241] control channel;

[0242] Data channel;

[0243] Measure the signal.

[0244] Optionally, the SSB transmission device 150 further includes:

[0245] a receiving module, configured to receive capability information of a second device, wherein the capability information includes a receiving bandwidth capability of the second device;

[0246] The determining module is configured to determine the first bandwidth according to the receiving bandwidth capability of the second device.

[0247] Optionally, the first sending module 151 is configured for the first device to send the SSB using an on-off keying (OOK) or amplitude shift keying (ASK) waveform.

[0248] The SSB transmission device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or other device other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0249] The SSB transmission device provided in the embodiment of the present application can implement the various processes implemented in the method embodiment of Figure 8 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0250] Referring to FIG. 16 , an embodiment of the present application further provides an SSB transmission device 160 , including:

[0251] The first receiving module 161 is configured to receive the SSB using a preset bandwidth, where the preset bandwidth is less than or equal to a first bandwidth, and the first bandwidth is a bandwidth used by the first device to send the SSB.

[0252] In an embodiment of the present application, the SSB receiving end uses a preset bandwidth to receive the SSB, and the preset bandwidth is less than or equal to the first bandwidth. The first bandwidth is the bandwidth used by the first device to send the SSB, so that the receiving end can use a preset bandwidth to receive the signal without increasing the complexity of the receiver without knowing the actual sending bandwidth of the low-power signal. The receiving end can still receive the SSB, reduce the reception complexity of the SSB, and improve the transmission performance of the downlink channel.

[0253] Optionally, the first bandwidth is M times the preset bandwidth, and M is greater than or equal to 1.

[0254] Optionally, the SSB transmission device 160 further includes:

[0255] The second receiving module is configured to receive indication information, where the indication information is used to indicate the first bandwidth or M, where the first bandwidth is M times the preset bandwidth, and M is greater than or equal to 1.

[0256] Optionally, the indication information is indicated through SSB, or through system information.

[0257] Optionally, the indication information includes one of the following through an SSB indication:

[0258] The indication information is indicated by a synchronization sequence in the SSB;

[0259] The indication information is indicated by the information bit of the physical broadcast channel in the SSB;

[0260] The indication information is indicated by CRC scrambling of the information bits of the physical broadcast channel in the SSB.

[0261] Optionally, the SSB transmission device 160 further includes:

[0262] A third receiving module is configured to receive at least one of the following information using the first bandwidth:

[0263] SSB;

[0264] Physical broadcast channel;

[0265] control channel;

[0266] Data channel;

[0267] Measure the signal.

[0268] Optionally, the SSB transmission device 160 further includes:

[0269] The determining module is configured to determine a receiving index according to at least one of the first bandwidth and the preset bandwidth.

[0270] Optionally, the reception indicator includes at least one of the following:

[0271] Measurement accuracy indicators;

[0272] measurement and evaluation cycles;

[0273] Measurement result reporting cycle;

[0274] The number of measurements per unit period.

[0275] Optionally, the SSB transmission device 160 further includes:

[0276] The sending module is configured to report capability information of the second device, where the capability information includes a receiving bandwidth capability of the second device.

[0277] Optionally, the SSB is transmitted via an OOK or ASK waveform.

[0278] The SSB transmission device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or other device other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0279] The SSB transmission device provided in the embodiment of the present application can implement the various processes implemented in the method embodiment of Figure 10 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0280] Referring to FIG. 17 , an embodiment of the present application further provides an SSB transmission device 170 , including:

[0281] The first sending module 171 is configured to send SSB using a first bandwidth, where the first bandwidth is less than or equal to a preset bandwidth.

[0282] In an embodiment of the present application, the transmission bandwidth of the SSB sent by the transmitting end may be smaller than the receiving bandwidth of the receiving end, and the receiving end can still detect the SSB, thereby reducing the impact on the signals of other communication systems with adjacent frequencies.

[0283] Optionally, the SSB transmission device 170 further includes:

[0284] The selection module is configured to select the first bandwidth from a preset first bandwidth set.

[0285] Optionally, the SSB transmission device 170 further includes:

[0286] The second sending module is configured to send indication information, where the indication information is used to indicate the first bandwidth.

[0287] Optionally, the indication information is indicated through SSB, or through system information.

[0288] Optionally, the indication information includes one of the following through an SSB indication:

[0289] The indication information is indicated by a synchronization sequence in the SSB;

[0290] The indication information is indicated by the information bit of the physical broadcast channel in the SSB;

[0291] The indication information is indicated by CRC scrambling of the information bits of the physical broadcast channel in the SSB.

[0292] Optionally, the SSB transmission device 170 further includes:

[0293] The receiving module is configured to receive a signal sent by a second device using the first bandwidth.

[0294] Optionally, the SSB includes at least one of a synchronization sequence and a physical broadcast channel.

[0295] Optionally, the first sending module 171 is configured to send the synchronization sequence and the physical broadcast channel using different periods.

[0296] Optionally, the SSB transmission device 170 further includes:

[0297] The first device sends at least one of the following using the first bandwidth:

[0298] control channel;

[0299] Data channel;

[0300] Measure the signal.

[0301] Optionally, the first sending module 171 is configured to send the SSB using an OOK or ASK waveform.

[0302] The SSB transmission device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or other device other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0303] The SSB transmission device provided in the embodiment of the present application can implement the various processes implemented in the method embodiment of Figure 11 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0304] Referring to FIG. 18 , an embodiment of the present application further provides an SSB transmission device 180 , including:

[0305] The first receiving module 181 is configured to receive the SSB using a preset bandwidth, where the preset bandwidth is greater than or equal to a first bandwidth, and the first bandwidth is a bandwidth used by the first device to send the SSB.

[0306] In an embodiment of the present application, the transmission bandwidth of the SSB sent by the transmitting end may be smaller than the receiving bandwidth of the receiving end, and the receiving end can still detect the SSB, thereby reducing the impact on the signals of other communication systems with adjacent frequencies.

[0307] Optionally, the SSB transmission device 180 further includes:

[0308] The second receiving module is configured to receive indication information, where the indication information is used to indicate the first bandwidth.

[0309] Optionally, the indication information is indicated through SSB, or through system information.

[0310] Optionally, the indication information includes one of the following through an SSB indication:

[0311] The indication information is indicated by a synchronization sequence in the SSB;

[0312] The indication information is indicated by the information bit of the physical broadcast channel in the SSB;

[0313] The indication information is indicated by CRC scrambling of the information bits of the physical broadcast channel in the SSB.

[0314] Optionally, the SSB transmission device 180 further includes:

[0315] A sending module is configured to send a signal using the first bandwidth.

[0316] Optionally, the SSB transmission device 180 further includes:

[0317] A determination module is used to determine a signal sending index according to the first bandwidth.

[0318] Optionally, the sending indicator includes at least one of the following:

[0319] In-band emission indicators;

[0320] Adjacent channel leakage ratio indicator;

[0321] Spurious indicators.

[0322] Optionally, the SSB is transmitted via an OOK or ASK waveform.

[0323] The SSB transmission device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or other device other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0324] The SSB transmission device provided in the embodiment of the present application can implement the various processes implemented in the method embodiment of Figure 12 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0325] As shown in Figure 19, an embodiment of the present application also provides a communication device 190, including a processor 191 and a memory 192. The memory 192 stores a program or instruction that can be run on the processor 191. When the program or instruction is executed by the processor 191, the various steps of the above-mentioned SSB transmission method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0326] The present application also provides a terminal including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps in the method embodiments shown in Figures 8, 10, 11, or 12. This terminal embodiment corresponds to the aforementioned terminal-side method embodiment, and each implementation process and implementation method of the aforementioned method embodiment can be applied to this terminal embodiment and achieve the same technical effects. Specifically, Figure 20 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0327] The terminal 200 includes but is not limited to: a radio frequency unit 201, a network module 202, an audio output unit 203, an input unit 204, a sensor 205, a display unit 206, a user input unit 207, an interface unit 208, a memory 209 and at least some of the components of the processor 2010.

[0328] Those skilled in the art will appreciate that the terminal 200 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 2010 through a power management system, thereby implementing functions such as charging, discharging, and power consumption management through the power management system. The terminal structure shown in FIG20 does not constitute a limitation of the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be described in detail here.

[0329] It should be understood that in an embodiment of the present application, the input unit 204 may include a graphics processing unit (GPU) 2041 and a microphone 2042, and the graphics processor 2041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 206 may include a display panel 2061, and the display panel 2061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 207 includes a touch panel 2071 and at least one of other input devices 2072. The touch panel 2071 is also called a touch screen. The touch panel 2071 may include two parts: a touch detection device and a touch controller. Other input devices 2072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0330] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 201 may transmit the data to the processor 2010 for processing. Furthermore, the RF unit 201 may send uplink data to the network-side device. Typically, the RF unit 201 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0331] The memory 209 can be used to store software programs or instructions and various data. The memory 209 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 209 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DRRAM). The memory 209 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0332] Processor 2010 may include one or more processing units. Optionally, processor 2010 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 2010.

[0333] The radio frequency unit 201 is configured to send the SSB using a first bandwidth, where the first bandwidth is greater than or equal to a preset bandwidth, and the preset bandwidth is an initial receiving bandwidth used by a second device receiving the SSB.

[0334] In an embodiment of the present application, the SSB transmitter uses a first bandwidth greater than or equal to a preset bandwidth to send the SSB, and the preset bandwidth is the initial receiving bandwidth used by the SSB receiver, so that more reliable transmission performance can be obtained by applying a larger bandwidth.

[0335] Alternatively, the radio frequency unit 201 is configured to receive the SSB using a preset bandwidth, where the preset bandwidth is less than or equal to a first bandwidth, and the first bandwidth is a bandwidth used by the first device to send the SSB.

[0336] In an embodiment of the present application, the SSB receiving end uses a preset bandwidth to receive the SSB, and the preset bandwidth is less than or equal to the first bandwidth. The first bandwidth is the bandwidth used by the first device to send the SSB, so that the receiving end can use a preset bandwidth to receive the signal without increasing the complexity of the receiver without knowing the actual sending bandwidth of the low-power signal. The receiving end can still receive the SSB, reduce the reception complexity of the SSB, and improve the transmission performance of the downlink channel.

[0337] Alternatively, the radio frequency unit 201 is configured to send the SSB using a first bandwidth, where the first bandwidth is less than or equal to a preset bandwidth.

[0338] In an embodiment of the present application, the transmission bandwidth of the SSB sent by the transmitting end may be smaller than the receiving bandwidth of the receiving end, and the receiving end can still detect the SSB, thereby reducing the impact on the signals of other communication systems with adjacent frequencies.

[0339] Alternatively, the radio frequency unit 201 is configured to receive the SSB using a preset bandwidth, where the preset bandwidth is greater than or equal to a first bandwidth, and the first bandwidth is a bandwidth used by the first device to send the SSB.

[0340] In an embodiment of the present application, the transmission bandwidth of the SSB sent by the transmitting end may be smaller than the receiving bandwidth of the receiving end, and the receiving end can still detect the SSB, thereby reducing the impact on the signals of other communication systems with adjacent frequencies.

[0341] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment of Figure 8, Figure 10, Figure 11 or Figure 12, and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0342] The present application also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiment shown in Figure 8 or Figure 11. This network-side device embodiment corresponds to the first device method embodiment described above, and each implementation process and implementation method of the above method embodiment are applicable to this network-side device embodiment and can achieve the same technical effects.

[0343] Specifically, embodiments of the present application also provide a network-side device. As shown in Figure 21, the network-side device 210 includes an antenna 211, a radio frequency device 212, a baseband device 213, a processor 214, and a memory 215. The antenna 211 is connected to the radio frequency device 212. In the uplink direction, the radio frequency device 212 receives information via the antenna 211 and sends the received information to the baseband device 213 for processing. In the downlink direction, the baseband device 213 processes the information to be transmitted and sends it to the radio frequency device 212. The radio frequency device 212 processes the received information and then sends it through the antenna 211.

[0344] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 213 , which includes a baseband processor.

[0345] The baseband device 213 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 21, one of the chips is, for example, a baseband processor, which is connected to the memory 215 through a bus interface to call the program in the memory 215 to execute the network device operations shown in the above method embodiment.

[0346] The network side device may further include a network interface 216, which is, for example, a Common Public Radio Interface (CPRI).

[0347] Specifically, the network side device 210 of the embodiment of the present application also includes: instructions or programs stored in the memory 215 and executable on the processor 214. The processor 214 calls the instructions or programs in the memory 215 to execute the methods of the modules shown in FIG15 or FIG17 and achieve the same technical effect. To avoid repetition, it will not be described here.

[0348] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned SSB transmission method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0349] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0350] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned SSB transmission method embodiment and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0351] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0352] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the above-mentioned SSB transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0353] An embodiment of the present application also provides a communication system, including: a first device and a second device, wherein the first device can be used to execute the steps of the SSB transmission method executed by the first device as described above, and the second device can be used to execute the steps of the SSB transmission method executed by the second device as described above.

[0354] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0355] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0356] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A synchronization signal block (SSB) transmission method, comprising: The first device sends the SSB using a first bandwidth, where the first bandwidth is greater than or equal to a preset bandwidth, and the preset bandwidth is an initial receiving bandwidth used by a second device that receives the SSB.

2. The method according to claim 1, wherein: The first bandwidth is M times the preset bandwidth, and M is greater than or equal to 1.

3. The method according to claim 1 or 2, wherein: Also includes: The first device selects the first bandwidth from a preset first bandwidth set; or, The first device selects M from a preset multiple set, and determines the first bandwidth according to the selected M and the preset bandwidth, the first bandwidth is M times the preset bandwidth, and M is greater than or equal to 1.

4. The method according to claim 1 or 2, wherein: Also includes: The first device sends indication information, where the indication information is used to indicate the first bandwidth or M, where the first bandwidth is M times the preset bandwidth, and M is greater than or equal to 1.

5. The method according to claim 4, wherein: The indication information is indicated through SSB, or through system information.

6. The method according to claim 5, wherein: The indication information includes one of the following through the SSB indication: The indication information is indicated by a synchronization sequence in the SSB; The indication information is indicated by the information bit of the physical broadcast channel in the SSB; The indication information is indicated by scrambling the cyclic redundancy check CRC of the information bits of the physical broadcast channel in the SSB.

7. The method according to claim 1, wherein: Also includes: The first device sends at least one of the following using the first bandwidth: Control channel; Data channel; Measure the signal.

8. The method according to claim 1, wherein: Also includes: The first device receives capability information of the second device, where the capability information includes a receiving bandwidth capability of the second device; The first device determines the first bandwidth according to a receiving bandwidth capability of the second device.

9. The method according to claim 1, wherein: The first device sending the SSB using the first bandwidth includes: The first device uses on-off keying OOK or amplitude shift keying ASK waveform to send the SSB.

10. A SSB transmission method, comprising: The second device receives the SSB using a preset bandwidth, where the preset bandwidth is less than or equal to a first bandwidth, and the first bandwidth is a bandwidth used by the first device to send the SSB.

11. The method according to claim 10, wherein: The first bandwidth is M times the preset bandwidth, and M is greater than or equal to 1.

12. The method according to claim 10 or 11, wherein: Also includes: The second device receives indication information, where the indication information is used to indicate the first bandwidth or M, where the first bandwidth is M times the preset bandwidth, and M is greater than or equal to 1.

13. The method according to claim 12, wherein: The indication information is indicated through SSB, or through system information.

14. The method according to claim 13, wherein: The indication information includes one of the following through the SSB indication: The indication information is indicated by a synchronization sequence in the SSB; The indication information is indicated by the information bit of the physical broadcast channel in the SSB; The indication information is indicated by CRC scrambling of the information bits of the physical broadcast channel in the SSB.

15. The method according to claim 12, wherein: The second device receives the indication information, and then further includes: The second device receives at least one of the following information using the first bandwidth: SSB; Physical broadcast channel; Control channel; Data channel; Measure the signal.

16. The method according to claim 12, wherein: Also includes: The second device determines a receiving index according to at least one of the first bandwidth and the preset bandwidth.

17. The method according to claim 16, wherein: The receiving indicator includes at least one of the following: Measurement accuracy indicators; Measurement and evaluation cycle; Measurement result reporting cycle; The number of measurements per unit period.

18. The method according to claim 10, wherein: Also includes: The second device reports capability information of the second device, where the capability information includes a receiving bandwidth capability of the second device.

19. The method according to claim 10, wherein: The SSB is transmitted using an OOK or ASK waveform.

20. A SSB transmission device, comprising: The first sending module is used to send SSB using a first bandwidth, where the first bandwidth is greater than or equal to a preset bandwidth, and the preset bandwidth is an initial receiving bandwidth used by a second device that receives the SSB.

21. The device according to claim 20, wherein: Also includes: A first selection module, configured to select the first bandwidth from a preset first bandwidth set; or, The second selection module is used to select M from a preset multiple set, and determine the first bandwidth according to the selected M and the preset bandwidth, wherein the first bandwidth is M times the preset bandwidth, and M is greater than or equal to 1.

22. The device according to claim 20 or 21, wherein: Also includes: The second sending module is used to send indication information, where the indication information is used to indicate the first bandwidth or M, the first bandwidth is M times the preset bandwidth, and M is greater than or equal to 1.

23. The device according to claim 20, wherein: Also includes: A third sending module is configured to send at least one of the following items using the first bandwidth: Control channel; Data channel; Measure the signal.

24. The device according to claim 20, wherein: Also includes: A receiving module, configured to receive capability information of a second device, wherein the capability information includes a receiving bandwidth capability of the second device; A determination module is used to determine the first bandwidth according to the receiving bandwidth capability of the second device.

25. A SSB transmission device, comprising: The first receiving module is used to receive the SSB using a preset bandwidth, where the preset bandwidth is less than or equal to a first bandwidth, and the first bandwidth is a bandwidth used by the first device to send the SSB.

26. The device according to claim 25, wherein Also includes: The second receiving module is used to receive indication information, where the indication information is used to indicate the first bandwidth or M, the first bandwidth is M times the preset bandwidth, and M is greater than or equal to 1.

27. The device according to claim 26, wherein: Also includes: A third receiving module is configured to receive at least one of the following information using the first bandwidth: SSB; Physical broadcast channel; Control channel; Data channel; Measure the signal.

28. The device according to claim 25, wherein Also includes: The determination module is used to determine a receiving index according to at least one of the first bandwidth and the preset bandwidth.

29. The device according to claim 25, wherein: Also includes: The sending module is used to report the capability information of the second device, where the capability information includes the receiving bandwidth capability of the second device.

30. A communication device, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the SSB transmission method as described in any one of claims 1 to 9 are implemented, or when the program or instruction is executed by the processor, the steps of the SSB transmission method as described in any one of claims 10 to 19 are implemented.

31. A readable storage medium storing a program or instruction, wherein the program or instruction, when executed by a processor, implements the SSB transmission method as described in any one of claims 1 to 9, or implements the steps of the SSB transmission method as described in any one of claims 10 to 19.

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