SSB detection method, electronic device, and network device

Abstract

The present application relates to the field of radio frequency, and discloses an SSB detection method, an electronic device, and a network device. The SSB detection method comprises: detecting a first SSB or a second SSB with a preset period at each frequency domain position, wherein the first SSB comprises a primary synchronization signal (PSS) or the first SSB comprises a PSS and a secondary synchronization signal (SSS), the second SSB comprises the PSS, the SSS, and a physical broadcast channel (PBCH), and at a preset frequency domain position, M-1 bursts of the first SSB and one burst of the second SSB are comprised within a time length of M preset periods, M being an integer greater than 1, and the preset period being less than the sending period of the second SSB; if the first SSB is detected at the current frequency domain position, continuing to detect the second SSB at the current frequency domain position; and if neither the first SSB nor the second SSB is detected at the current frequency domain position, detecting the first SSB or the second SSB at the next frequency domain position with the preset period.

Description

SSB detection method, electronic device and network device

[0001] The present application claims priority to the Chinese patent application No. 202411394032.4, filed on September 29, 2024, and entitled "SSB detection method, electronic device and network device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of radio frequency, in particular to a synchronization signal block (SSB) detection method, an electronic device and a network device. BACKGROUND

[0003] Since the satellite works in space and is powered by solar panels, the power of the satellite is limited, and the number of beams activated at the same time is limited, so the satellite cannot send SSBs on all beams at the same time for electronic devices to access, and a longer SSB period is needed to send SSBs on each beam in batches.

[0004] When the satellite supports multiple SSB periods, in order to ensure that the electronic device can detect the SSB, the electronic device usually uses the largest SSB period for SSB detection, but this will cause the access delay of the electronic device to be relatively large. SUMMARY

[0005] Embodiments of the present application provide an SSB detection method, an electronic device and a network device, which are used to reduce the access delay of the electronic device when the satellite supports multiple SSB periods.

[0006] To achieve the above object, the embodiments of the present application adopt the following technical solutions:

[0007] In a first aspect, an SSB detection method is provided, applied to an electronic device, and the method comprises: detecting a first SSB or a second SSB at each frequency domain position with a preset period; the first SSB comprises a primary synchronization signal (PSS), or the first SSB comprises a PSS and a secondary synchronization signal (SSS); the second SSB comprises a PSS, an SSS and a physical layer broadcast channel (PBCH); in a preset frequency domain position, a burst of M-1 first SSBs and a burst of one second SSB are included in a time length of M preset periods, and M is an integer greater than 1; if the first SSB is detected at the current frequency domain position, the second SSB is continuously detected at the current frequency domain position; if the first SSB and the second SSB are not detected at the current frequency domain position, the first SSB or the second SSB is detected at the next frequency domain position with the preset period.

[0008] The SSB detection method provided in the embodiments of the present application is as follows: the network device transmits a burst of M-1 first SSBs and a burst of a second SSB at preset frequency domain positions within a time length of M preset periods, where M is a positive integer greater than 1. The first SSB is a simplified SSB, including a PSS, or the first SSB includes a PSS and an SSS; and the second SSB is a complete SSB, including a PSS, an SSS and a PBCH. The electronic device needs to detect the second SSB to successfully access the network. To this end, the electronic device detects the first SSB or the second SSB at each frequency domain position with a preset period, and the preset period is less than the transmission period of the second SSB. If the electronic device detects the first SSB at the current frequency domain position, it indicates that the second SSB also exists at the current frequency domain position, and therefore the electronic device continues to detect the second SSB at the current frequency domain position. If neither the first SSB nor the second SSB is detected at the current frequency domain position, it indicates that the second SSB does not exist at the current frequency domain position, and therefore the electronic device detects the first SSB or the second SSB at the next frequency domain position with the preset period. In this way, at each frequency domain position where no second SSB (and also no first SSB) is transmitted, the electronic device does not need to detect the first SSB or the second SSB according to the period of the second SSB, but detects the first SSB or the second SSB with a preset period smaller than the transmission period of the second SSB, so that the time for detecting the SSB can be greatly reduced, the access speed of the electronic device can be greatly improved, and the access delay of the electronic device can be reduced.

[0009] In a possible implementation, detecting the first SSB or the second SSB at each frequency domain position with a preset period includes: detecting the first SSB or the second SSB at each frequency domain position with N preset periods. Due to signal fluctuation, the electronic device may not be able to detect the first SSB or the second SSB within one preset period at a frequency domain position, and the electronic device can detect the first SSB or the second SSB at the frequency domain position for N consecutive preset periods to avoid missing detection of the first SSB or the second SSB.

[0010] In a possible implementation, the method further includes: receiving a radio resource control (RRC) message from the network device, where the RRC message includes the value of N. That is, the upper limit of the preset period can be indicated by the network device.

[0011] In a possible implementation, the first SSB includes period indication information, the period indication information indicates a value of a transmission period of the second SSB, and the continuing detection of the second SSB at the current frequency domain location includes: continuing detection of the second SSB at the current frequency domain location according to the transmission period of the second SSB according to the period indication information. In this way, the electronic device switches the period of SSB detection to the transmission period of the second SSB according to the period indication information, and continues to detect the second SSB at the current frequency domain location according to the transmission period of the second SSB, thereby reducing the access delay of the user equipment.

[0012] In a possible implementation, the period indication information is a pattern of the first SSB, and the pattern of the first SSB indicates that the first SSB includes a PSS, or the first SSB includes a PSS and an SSS. This implementation can indicate two values of the transmission period of the second SSB.

[0013] In a possible implementation, the period indication information is a combination of patterns of a plurality of first SSBs. Assuming that there are K first SSBs, this implementation can indicate 2^K values of the transmission period of the second SSB.

[0014] In a possible implementation, a sequence number of a PSS sequence in the first SSB is used to determine the period indication information. This implementation can indicate three values of the transmission period of the second SSB.

[0015] In a possible implementation, the upper limit of the period is received from the network device, and the preset period is less than the upper limit of the period. That is, the upper limit of the preset period can be indicated by the network device.

[0016] In a second aspect, a SSB detection method is provided, applied to a network device, and the method includes: transmitting a burst of M-1 first SSBs and a burst of a second SSB at a preset frequency domain location within a time length of M preset periods; the first SSB includes a primary synchronization signal PSS, or the first SSB includes the PSS and a secondary synchronization signal SSS; the second SSB includes the PSS, the SSS, and a physical layer broadcast channel PBCH; and M is an integer greater than 1.

[0017] In a possible implementation, an RRC message is transmitted to the electronic device, and the RRC message includes a value of N, used to instruct the electronic device to detect the first SSB or the second SSB in N preset periods.

[0018] In a possible implementation, the first SSB includes period indication information, the period indication information indicates a value of a transmission period of the second SSB.

[0019] In a possible implementation, the periodicity indication information is a pattern of the first SSB, and the pattern of the first SSB indicates that the first SSB includes a PSS, or the first SSB includes a PSS and a SSS.

[0020] In a possible implementation, the periodicity indication information is a combination of patterns of a plurality of first SSBs.

[0021] In a possible implementation, a sequence number of a primary synchronization signal (PSS) sequence in the first SSB is used to determine the periodicity indication information.

[0022] In a possible implementation, the electronic device is sent with upper limit information of periodicity, and the electronic device detects that a preset periodicity of the first SSB or the second SSB is less than the upper limit information of periodicity.

[0023] In a third aspect, an electronic device is provided, including a processor and a memory, the memory storing instructions that, when executed by the processor, cause the electronic device to perform the method in the first aspect and any implementation thereof.

[0024] In a fourth aspect, a network device is provided, including a processor and a memory, the memory storing instructions that, when executed by the processor, cause the network device to perform the method in the second aspect and any implementation thereof.

[0025] In a fifth aspect, a computer-readable storage medium is provided, storing instructions that, when executed on an electronic device, cause the electronic device to perform the method in the first aspect and any implementation thereof; and when executed on a network device, cause the network device to perform the method in the second aspect and any implementation thereof.

[0026] In a sixth aspect, a computer program product is provided, including instructions that, when executed on an electronic device, cause the electronic device to perform the method in the first aspect and any implementation thereof; and when executed on a network device, cause the network device to perform the method in the second aspect and any implementation thereof.

[0027] The technical effects of the second aspect and the sixth aspect are referred to the technical effects of the first aspect and any implementation thereof, which are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0028] FIG. 1 is a schematic diagram of an architecture of a communication system provided by an embodiment of the present application;

[0029] FIG. 2 is a schematic diagram of a structure of an electronic device provided by an embodiment of the present application;

[0030] FIG. 3 is a schematic diagram of an appearance of an electronic device provided by an embodiment of the present application;

[0031] FIG. 4 is a structural schematic diagram of a network device according to an embodiment of the present application;

[0032] FIG. 5 is a schematic diagram of transmitting SSBs in frequency domain positions according to an embodiment of the present application;

[0033] FIG. 6 is a flowchart of an SSB detection method according to an embodiment of the present application;

[0034] FIG. 7 is a schematic diagram of a first SSB and a second SSB according to an embodiment of the present application;

[0035] FIG. 8 is a schematic diagram of transmitting a first SSB and a second SSB in frequency domain positions according to an embodiment of the present application. DETAILED DESCRIPTION

[0036] First, some concepts involved in the present application are described.

[0037] The terms "first", "second", and the like involved in the embodiments of the present application are only used for the purpose of distinguishing the same type of features, and cannot be understood as indicating relative importance, quantity, order, and the like.

[0038] The terms "exemplary" or "for example" and the like involved in the embodiments of the present application are used to indicate that the embodiments or design solutions described as "exemplary" or "for example" are not necessarily preferred or advantageous over other embodiments or design solutions. Rather, the terms "exemplary" or "for example" are used to present relevant concepts in a specific manner.

[0039] The terms "coupled" and "connected" involved in the embodiments of the present application should be interpreted in a broad sense, for example, can refer to a direct physical connection, or can refer to an indirect connection through electronic devices, for example, a connection through resistors, inductors, capacitors or other electronic devices.

[0040] Global synchronization channel number (GSCN). In a wireless communication system, GSCN is used to represent a certain, absolute frequency position, for example, GSCN takes values 2-7498 to represent 0-3000MHz, GSCN takes values 7499-22255 to represent 3000-24250MHz, and GSCN takes values 22255-26639 to represent 24250-100000MHz. The network device transmits SSBs at these GSCNs, and accordingly, the electronic device detects SSBs in sequence at these GSCNs.

[0041] As shown in FIG. 1, embodiments of the present application provide a communication system, including an electronic device 101 and a network device 201. Wherein the electronic device 101 is an electronic device with wireless communication function. The electronic device can be mobile or fixed. The electronic device can be deployed on land (such as indoors or outdoors, handheld or vehicle-mounted, etc.), water surface (such as ships, etc.), or air (such as airplanes, balloons, and satellites, etc.). The electronic device can be referred to as a user equipment (UE), an access terminal, a terminal unit, a subscriber unit, a terminal station, a mobile station (MS), a mobile terminal, a terminal agent, or a terminal apparatus, etc. For example, the electronic device can be a mobile phone, a tablet computer, a notebook computer, a smart bracelet, a smart screen, a smart watch, a virtual reality (VR) device, an augmented reality (AR) device, a terminal in industrial control, a terminal in self driving, a terminal in remote medical, a terminal in smart grid, a terminal in transportation safety, a terminal in smart city, a terminal in smart home, etc. Embodiments of the present application do not limit the specific type and structure of the electronic device. The network device 201 can be a satellite or a base station. The electronic device 101 and the network device 201 can perform satellite communication. Embodiments of the present application take the electronic device 101 as a mobile phone and the network device 201 as a satellite as an example, but are not intended to be limited thereto.

[0042] As shown in FIG. 2, an electronic device 101 is provided in an embodiment of the present application. Taking the electronic device as a mobile phone for example, FIG. 2 shows a possible structure of the electronic device 101. The electronic device 101 can include a processor 210, an external memory interface 220, an internal memory 221, a universal serial bus (USB) interface 230, a power management module 240, a battery 241, a wireless charging coil 242, an antenna 1, an antenna 2, a mobile communication module 250, a wireless communication module 260, an audio module 270, a loudspeaker 270A, a receiver 270B, a microphone 270C, a headset interface 270D, a sensor module 280, a key 290, a motor 291, an indicator 292, a camera 293, a display screen 294, and a subscriber identification module (SIM) card interface 295, etc. Optionally, in some embodiments, an audio digital signal processor (ADSP) 243 is further included.

[0043] It can be understood that the structure shown in the embodiments of the present application does not constitute a specific limitation on the electronic device 101. In other embodiments of the present application, the electronic device 101 can include more or fewer components than those shown, or combine some components, or split some components, or different arrangement of components. The components shown can be implemented in hardware, software, or a combination of software and hardware.

[0044] The processor 210 can include one or more processing units, for example: the processor 210 can be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processing unit (CPU), an application processor (AP), a network processor (NP), a digital signal processor (DSP), a micro controller unit (MCU), a programmable logic device (PLD), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, and a neural-network processing unit (NPU), etc. Different processing units can be independent devices or integrated in one or more processors. For example, the processor 210 can be an application processor (AP). Alternatively, the above processor 210 can be integrated in a system on chip (SoC). Alternatively, the above processor 210 can be integrated in an integrated circuit (IC) chip. The processor 210 can include an analog front end (AFE) and a micro-controller unit (MCU) in the IC chip.

[0045] The processor 210 executes the antenna feeding control method provided by the embodiments of the present application by executing programs and computer instructions stored in the internal memory 221.

[0046] The processor 210 can also be provided with a memory for storing computer instructions and data. In some embodiments, the memory in the processor 210 is a cache memory. The memory can store computer instructions or data that have just been used or are recycled by the processor 210. If the processor 210 needs to use the computer instructions or data again, it can directly call from the memory. This avoids repeated access and reduces the waiting time of the processor 210, thereby improving the efficiency of the system.

[0047] In some embodiments, the processor 210 can include one or more interfaces. The interfaces can include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a subscriber identity module (SIM) interface, and / or a USB interface, etc.

[0048] The ADSP 243 can be coupled with the audio module 270 and the sensor module 280, and can be used to process audio signals and also process sensor data. The ADSP 243 can remain active while the processor is in a sleep state, thereby reducing power consumption of the electronic device.

[0049] It can be understood that the interface connection relationship between the modules shown in the embodiments of the present application is only illustrative and does not constitute a structural limitation of the electronic device 101. In some other embodiments of the present application, the electronic device 101 can also use different interface connection modes or a combination of multiple interface connection modes in the above embodiments.

[0050] The external memory interface 220 can be used to connect an external memory card, such as a micro SanDisk (Micro SD) card, to expand the storage capacity of the electronic device 101. The external memory card communicates with the processor 210 through the external memory interface 220 to realize a data storage function. For example, music, video, and other files are saved in the external memory card.

[0051] The internal memory 221 can be used to store computer executable program code, which includes computer instructions. The processor 210 performs various functional applications and data processing of the electronic device 101 by running the computer instructions stored in the internal memory 221, for example, performs the SSB detection method related to the embodiments of the present application. In addition, the internal memory 221 can include a high-speed random access memory, and can also include a non-volatile memory, for example, at least one magnetic disk storage device, a flash memory device, a universal flash storage (UFS), etc.

[0052] The memory related to the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM) used as an external cache. By way of example and not limitation, many forms of RAM can be used, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the system and method described herein is intended to include, but not limited to, these and any other suitable types of memory.

[0053] The electronic device 101 can realize audio functions through an audio module 270, a speaker 270A, a receiver 270B, a microphone 270C, a headset jack 270D, and an application processor, etc. For example, music playing, recording, etc.

[0054] The audio module 270 is configured to convert digital audio information into an analog audio signal output, and to convert an analog audio input into a digital audio signal. In some embodiments, the audio module 270 can be disposed in the processor 210, or some functional modules of the audio module 270 can be disposed in the processor 210. The speaker 270A, also referred to as a "loudspeaker", is configured to convert an audio electrical signal into a sound signal. The receiver 270B, also referred to as a "earpiece", is configured to convert an audio electrical signal into a sound signal. The microphone 270C, also referred to as a "microphone", "microphone", is configured to convert a sound signal into an electrical signal. The electronic device 101 can be provided with at least one microphone 270C. The earphone interface 270D is configured to connect a wired earphone. The earphone interface 270D can be a USB interface 230, or a 3.5mm open mobile terminal platform (OMTP) standard interface, a cellular telecommunications industry association of the USA (CTIA) standard interface.

[0055] The keys 290 include a power key, a volume key, and the like. The keys 290 can be mechanical keys. Alternatively, the keys 290 can be touch keys. The electronic device 101 can receive a key input, and generate a key signal input related to user settings and function control of the electronic device 101. The motor 291 can generate a vibration prompt. The motor 291 can be used for incoming call vibration prompts, and can also be used for touch vibration feedback. The indicator 292 can be an indicator light, and can be used to indicate a charging state, a power change, and can also be used to indicate a message, a missed call, a notification, and the like. The SIM card interface 295 is configured to connect a SIM card. The SIM card can be inserted into or removed from the SIM card interface 295 to achieve contact and separation with the electronic device 101. The electronic device 101 can support one or N SIM card interfaces, N being a positive integer greater than 1. The SIM card interface 295 can support a Nano SIM card, a Micro SIM card, a SIM card, and the like. In some embodiments, the electronic device 101 uses an embedded SIM (eSIM) card, which can be embedded in the electronic device 101 and cannot be separated from the electronic device 101.

[0056] The electronic device 101 can implement a photographing function through an ISP, a camera 293, a video codec, a GPU, a display 294, and an application processor, etc. The ISP is used to process data fed back by the camera 293. In some embodiments, the ISP can be disposed in the camera 293. The camera 293 is used to capture a still image or a video. In some embodiments, the electronic device 101 can include 1 or N cameras 293, where N is a positive integer greater than 1, such as the front camera 2931 and the back camera 2932 shown in FIG. 3.

[0057] The electronic device 101 can implement a display function through a GPU, a display 294, and an application processor, etc. The GPU is a microprocessor for image processing, which is connected to the display 294 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 210 can include one or more GPUs that execute computer instructions to generate or change display information.

[0058] The sensor module 280 can include a pressure sensor, a gyro sensor, a barometric sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, an angle sensor, etc. When the display 294 is a folding screen, the angle sensor can detect the folding angle of the display 294, and the folding angle ranges from 0 to 180 degrees.

[0059] The battery 241 can include one or more batteries to power the load. The power management module 240 is used to receive charging input from a charger. The charger can be a wireless charger, such as a wireless charging base, another electronic device 101 with a reverse wireless charging function, etc. The power management module 240 can receive wireless charging input through the wireless charging coil 242 of the electronic device. The charger can also be a wired charger, for example, the power management module 240 can receive charging input from a wired charger through the USB interface 230. The power management module 240 is also called a charging chip.

[0060] The power management module 240 can supply power to the electronic device while charging the battery 241. The power management module 240 receives input from the battery 241 to power the processor 210, the internal memory 221, the external memory interface 220, the display 294, the camera 293, and the wireless communication module 260, etc. The power management module 240 can also be used to monitor parameters such as the capacity, voltage, battery cycle count, and battery health state (leakage, impedance) of the battery 241. In other embodiments, the power management module 240 can also be disposed in the processor 210.

[0061] The display screen 294 is configured to display images, videos, and the like. The display screen 294 includes a display panel. In some embodiments, the electronic device 101 can include one or more display screens 294.

[0062] The wireless communication function of the electronic device 101 can be implemented by the antenna 1, the antenna 2, the mobile communication module 250, the wireless communication module 260, a modem processor, and the like.

[0063] The antenna 1 and the antenna 2 are configured to transmit and receive electromagnetic wave signals. Each antenna in the electronic device 101 can be configured to cover a single or multiple communication frequency bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example, the antenna 1 can be multiplexed as a diversity antenna for a wireless local area network. In some other embodiments, the antennas can be used in combination with a tuning switch.

[0064] The mobile communication module 250 (also referred to as a cellular communication module) can provide a solution for wireless communication including 2G / 3G / 4G / 5G / 6G, and the like, applied to the electronic device 101. The wireless communication module 260 (including a satellite communication module) can provide a solution for wireless communication including a wireless local area network (WLAN) (such as a wireless fidelity (Wi-Fi) network), Bluetooth (BT), a global navigation satellite system (GNSS) (such as a Beidou satellite communication), a satellite network communication (such as a Tianhong satellite communication, a Xingwang satellite communication), a frequency modulation (FM), a near field communication (NFC), an infrared (IR) technology, and the like, applied to the electronic device 101. In some embodiments, the antenna 1 of the electronic device 101 is coupled with the mobile communication module 250, and the antenna 2 is coupled with the wireless communication module 260, so that the electronic device 101 can communicate with a network and other devices through wireless communication technologies. The mobile communication module 250 and the wireless communication module 260 can be collectively referred to as a radio frequency circuit.

[0065] As shown in FIG. 3A, the electronic device 101 can include a front camera 2931 and a display screen 294. As shown in FIG. 3B, the electronic device 101 can include a back camera 2932. The front camera 2931 and the back camera 2932 are configured to capture still images or dynamic videos (which can be collectively referred to as images). The display screen 294 is configured to display the images or receive touch operations of a user.

[0066] As shown in FIG. 4, the network device 201 can include a processor 410, a memory 411, a radio frequency (RF) circuit 412, and an antenna 413. The memory 411 stores instructions. The processor 410, by executing the instructions, causes the network device 201 to perform the SSB detection method according to the embodiments of the present application, for example, controls the RF circuit 412 to transmit the SSB through the antenna 413.

[0067] With the increasing demand for communication services, the pure ground cellular communication system cannot meet the requirements of network coverage. In recent years, space technology and satellite communication technology are developing rapidly, and satellite communication has grown into a new communication method accepted by the public. Currently, the ground cellular communication system is mainly concentrated in the land area where there are a large number of people gathering or activities. These areas only account for a very small part of the earth's area. However, in the ocean, desert, forest and remote areas, it is difficult to deploy a ground cellular communication system, so it is impossible to achieve network coverage in these areas. The non-terrestrial network (NTN) communication system based on satellite communication can overcome the limitations of natural conditions of the ground cellular communication system, quickly achieve network coverage, and avoid the destruction of network facilities by natural disasters. Satellite communication will become an important part of future 6G communication technology.

[0068] Satellite communication currently mainly includes two communication modes: a forwarding mode and a regenerative mode. In the forwarding mode, the satellite is responsible for forwarding the uplink data from the electronic device to the base station, or forwarding the downlink data from the base station to the electronic device, and does not perform coding and decoding and other related operations. In the regenerative mode, the satellite has part of the functions of the base station, such as being able to perform coding and decoding and other related operations on the uplink data and the downlink data.

[0069] For ground cellular communication, the SSB period for SSB detection by the electronic device is 20ms, which is relatively short. However, for satellite communication, the coverage range of a single satellite is much larger than that of a single ground base station, so each satellite needs to provide thousands of beams to ensure the coverage range of the satellite. Since the satellite works in space and is powered by a solar panel, the power of the satellite is limited, and the number of beams activated at the same time is limited, so the satellite cannot send SSBs on all beams at the same time for the electronic device to access, and needs a longer SSB period to send SSBs in batches on each beam. When the satellite works in Set 1-1 mode (transmit power 1310W), the satellite needs at least an SSB period of 80ms to complete the transmission of SSBs on all beams. When the satellite works in Set 1-2 mode (power 200W), the satellite needs at least an SSB period of 640ms to complete the transmission of SSBs on all beams.

[0070] When the satellite supports multiple SSB periods, in order to ensure that the electronic device can detect the SSB, the electronic device usually uses the largest SSB period (for example, 640 ms) for SSB detection, but this will cause the access delay of the electronic device to be relatively large. For example, as shown in FIG. 5, assuming that there are 5 GSCNs (GSCN1-GSCN5) in the frequency band, the satellite transmits an SSB on GSCN5, and the transmission period is 80 ms. As shown in FIG. 5A, if the electronic device sequentially performs SSB detection on GSCN1-GSCN5 with the minimum SSB period of 80 ms, it takes 400 ms to detect the SSB. As shown in FIG. 5B, if the electronic device sequentially performs SSB detection on GSCN1-GSCN5 with at least one maximum SSB period of 640 ms, it takes 3200 ms to detect the SSB. The difference between the two is 2800 ms.

[0071] To this end, an embodiment of the present application provides an SSB detection method. When the satellite transmits an SSB with a long period, the satellite not only transmits a complete SSB with a long period on a preset frequency domain position, but also transmits multiple simplified SSBs with short periods on the preset frequency domain position. Therefore, on the frequency domain position where the simplified SSB is not detected, the electronic device does not have to detect the complete SSB for a long time, but on the preset frequency domain position where the simplified SSB is detected, the electronic device continues to detect the complete SSB, thereby reducing the access delay of the electronic device.

[0072] As shown in FIG. 6, the SSB detection method includes the following steps.

[0073] S101. A network device (for example, a satellite) transmits a burst of M-1 first SSBs and a burst of a second SSB on a preset frequency domain position within a time length of M preset periods.

[0074] A burst of an SSB includes one or more SSBs. Multiple SSBs can be used to enhance cell coverage, and the electronic device can also improve the demodulation capability of the SSB by signal combination on multiple SSBs.

[0075] As shown in A of FIG. 7, a complete SSB in the prior art includes a primary synchronization signal (PSS) of one symbol, a secondary synchronization signal (SSS) of one symbol, and a physical broadcast channel (PBCH) of two symbols. The four symbols of the SSB in the time domain are PSS, PBCH, SSS, and PBCH in sequence. The PSS and the SSS are mainly used for time domain synchronization, frequency domain synchronization, and obtaining a cell identity (ID) in the downlink synchronization process. The PSS sequence is obtained from an m sequence, and the SSS sequence is obtained from a Gold sequence, which are used for time domain synchronization and frequency domain synchronization in the downlink synchronization process. The SSS sequence number and the PSS sequence number are used to determine the cell identity. The PBCH includes a system frame number, bandwidth information, and antenna configuration.

[0076] As shown in B and C of FIG. 7, in the embodiments of the present application, the first SSB is a simplified SSB, which includes the PSS, or the first SSB includes the PSS and the SSS, that is, the first SSB does not include the PBCH, and the symbol at the preset PBCH position of the first SSB does not include the PBCH (or, at this time, the network device does not send any signal at the preset time-frequency domain position, or sends other signals except the PBCH). The second SSB is the complete SSB shown in A of FIG. 7, which includes the PSS, the SSS, and the PBCH. The transmission of the SSB is located in a time window, the length of the transmission time window of each first SSB is the same as the length of the transmission time window of each second SSB, and the length of the time window is equal to the time length of the preset period. For example, the length of the transmission time window of the first SSB and the length of the transmission time window of the second SSB are both 80 ms.

[0077] The transmission period of the second SSB can be the maximum SSB period supported by the network device (for example, 640 ms), the transmission period of the second SSB can be the maximum SSB period for achieving complete coverage (for example, 640 ms), and the transmission period of the second SSB can also be other SSB periods (for example, 160 ms, 320 ms) greater than the time length of the preset period. All possible values of the transmission period of the second SSB are collectively referred to as candidate SSB periods.

[0078] In the time length of the M preset periods, a burst of M-1 first SSBs and a burst of one second SSB can be included. The network device transmits M-1 first SSBs for each second SSB transmitted. Embodiments of the present application do not limit the order of the M-1 first SSBs and the second SSB in the time length of the M preset periods. The second SSB can be located before the M-1 first SSBs, after the M-1 first SSBs, or between any two first SSBs. The electronic device can detect the first SSB or the second SSB at any time starting from the preset frequency domain position.

[0079] For example, as shown in FIG. 7B, assuming that M=8 and the time length of the preset period is 80 ms, the network device transmits a second SSB in the fourth 80 ms and transmits a first SSB in the remaining first, second, third, fifth, sixth, seventh, and eighth 80 ms. In this case, the transmission period of the second SSB is 640 ms. As shown in FIG. 7C, assuming that M=4 and the time length of the preset period is 80 ms, the network device transmits a second SSB in the fourth and eighth 80 ms and transmits a first SSB in the remaining first, second, third, and fifth, sixth, and seventh 80 ms. In this case, the transmission period of the second SSB is 320 ms.

[0080] The frequency domain position involved in the embodiments of the present application can be a frequency domain position corresponding to a global synchronization channel number (GSCN). For example, as shown in FIG. 8, assuming that five different frequency domain positions corresponding to five GSCNs (GSCN1-GSCN5) are included in a frequency band, the network device (for example, a satellite) transmits a first SSB and a second SSB in the frequency domain position corresponding to GSCN5. In this case, the preset frequency domain position is the frequency domain position corresponding to GSCN5.

[0081] In addition, the first SSB can further include period indication information, the period indication information indicating a value of the transmission period of the second SSB, the value of the transmission period of the second SSB being one of the candidate SSB periods. In this way, the electronic device can switch the SSB detection period from the preset period to the transmission period of the second SSB according to the period indication information, and continue to detect the second SSB in the current frequency domain position according to the transmission period of the second SSB, thereby reducing the access delay of the electronic device.

[0082] In a possible implementation, the sequence number of the PSS sequence in the first SSB can be used to determine the period indication information. For example, the PSS sequence d PSS (n) can be obtained through an m sequence x(m), the PSS sequence d PSS (n) = 1-2x(m), m is the sequence number of the m sequence, and n is the sequence number of the PSS sequence, 0≤n<127. n is the sequence number of the PSS sequence, 0≤n<127, i.e. the periodicity indication information, For example, the values 0, 1, 2 of the periodicity indication information can respectively indicate that the transmission period of the second SSB is 160 ms, 320 ms, and 640 ms.

[0083] In another possible implementation, the periodicity indication information is a pattern of the first SSB, i.e. the pattern of the first SSB can indicate the value of the transmission period of the second SSB. The pattern of the first SSB indicates that the first SSB includes a PSS, or the first SSB includes a PSS and an SSS. That is, the first SSB including a PSS is a first pattern, and the first SSB including a PSS and an SSS is a second pattern. The first pattern can be represented by 0, and the second pattern can be represented by 1, or the first pattern can be represented by 1, and the second pattern can be represented by 0. For example, the first pattern indicates that the transmission period of the second SSB is 160 ms, and the second pattern indicates that the transmission period of the second SSB is 320 ms.

[0084] In yet another possible implementation, the periodicity indication information is a combination of patterns of multiple (e.g. K, 1 < K ≤ M-1) first SSBs, i.e. the combination of patterns of the multiple first SSBs can indicate the value of the transmission period of the second SSB, and different combinations of patterns of the multiple first SSBs can indicate different values of the transmission period of the second SSB.

[0085] For example, as shown in FIG. 7B, the first first SSB is of the second pattern, the second first SSB is of the second pattern, and the K first SSBs are of the same pattern, K = 2, which is a first combination of patterns. As shown in FIG. 7C, the first first SSB is of the second pattern, the second first SSB is of the first pattern, and the K first SSBs are of different patterns, K = 2, which is a second combination of patterns. For another example, as shown in FIG. 7B, the first first SSB is of the second pattern, the second first SSB is of the second pattern, and the third first SSB is of the second pattern, and the K first SSBs are of the same pattern, K = 3, which is a third combination of patterns. As shown in FIG. 7C, the first first SSB is of the second pattern, the second first SSB is of the first pattern, and the third first SSB is of the second pattern, and the K first SSBs are of different patterns, K = 3, which is a fourth combination of patterns. For example, the first combination of patterns or the third combination of patterns indicates that the transmission period of the second SSB is 640 ms, and the second combination of patterns or the fourth combination of patterns indicates that the transmission period of the second SSB is 320 ms.

[0086] It should be noted that the network device does not continuously transmit the second SSB at the preset frequency domain location, but transmits the first SSB, so as to reduce power consumption by reducing the transmission of the PBCH in the case of power limitation.

[0087] S102, the electronic device detects the first SSB or the second SSB at each frequency domain location with a preset period.

[0088] The preset period is less than the transmission period of the second SSB. The preset period can be the minimum SSB period supported by the network device (for example, 20 ms), the preset period can be the minimum SSB period for achieving full coverage (for example, 80 ms), and the preset period can also be an integer multiple of any of the above minimum SSB periods. The preset period can also be more than one detection period. For example, due to signal fluctuations, the electronic device may not be able to detect the first SSB or the second SSB at a frequency domain location for a preset period. The electronic device can detect the first SSB or the second SSB at the frequency domain location for N preset periods in succession to avoid missing the first SSB or the second SSB, where N is an integer greater than or equal to 1.

[0089] The upper limit of the preset period can be indicated by the network device. In one possible implementation, the network device can send period upper limit information to the electronic device. Accordingly, the electronic device receives the period upper limit information from the network device, and the preset period is less than the period upper limit information. The period upper limit information can be carried in a radio resource control (RRC) message.

[0090] In another possible implementation, the network device can send the value of N to the electronic device, where N is an integer greater than or equal to 1. The value of N can be carried in an RRC message. Accordingly, the electronic device receives the value of N from the network device, and the electronic device can detect the first SSB or the second SSB at each frequency domain location for N preset periods.

[0091] The embodiments of the present application do not limit the order in which the electronic device traverses each frequency domain location. The electronic device can traverse the corresponding frequency domain location in ascending order of GSCN or in descending order of GSCN. For example, as shown in FIG. 8, the electronic device can detect the first SSB or the second SSB at the frequency domain locations corresponding to GSCN1-GSCN5 in turn.

[0092] According to whether the electronic device detects the first SSB or the second SSB at the current frequency domain location, one of S103-S105 can be performed.

[0093] S103, if the electronic device detects the first SSB at the current frequency domain location, continue detecting the second SSB at the current frequency domain location. S104, if the electronic device detects the second SSB at the current frequency domain location, access the network according to the second SSB. S105, if the electronic device does not detect the first SSB and the second SSB at the current frequency domain location, detect the first SSB or the second SSB at the next frequency domain location with a preset period.

[0094] If the electronic device detects the first SSB at the current frequency domain location, it means that the current frequency domain location is the preset frequency domain location, and there will also be a second SSB at the current frequency domain location, so the second SSB is continued to be detected at the current frequency domain location. If the electronic device detects the second SSB at the current frequency domain location, since the cell identifier can be obtained through the PSS and the SSS, and the system frame number, bandwidth information, and antenna configuration information can be determined through the PBCH, the electronic device can access the network according to these information. If the electronic device does not detect the first SSB at the current frequency domain location, it means that there will also be no second SSB at the current frequency domain location, so it is no longer continued to detect the second SSB at the current frequency domain location, but jumps to the next frequency domain location to detect the first SSB or the second SSB with a preset period. In particular, the electronic device can detect the first SSB or the second SSB at the next frequency domain location with N preset periods. In this way.

[0095] From the electronic device detecting the first SSB at the preset frequency domain location to detecting the second SSB at the preset frequency domain location, it only needs a minimum of one preset period of time length, and a maximum of M preset periods of time length, which is at most equal to the maximum SSB period. At each preset frequency domain location where the first SSB and the second SSB are not transmitted, the electronic device only needs to detect the first SSB or the second SSB with a maximum of N preset periods. Compared with the prior art in which the electronic device detects SSB at each frequency domain location with at least one maximum SSB period, the embodiments of the present application can greatly reduce the time of detecting SSB, and thus can greatly improve the access speed of the electronic device and reduce the access delay of the electronic device.

[0096] As shown in FIG. 8, still assuming that the frequency band includes five GSCN (GSCN1-GSCN5) corresponding frequency domain positions, the satellite transmits the first SSB and the second SSB at the frequency domain position corresponding to GSCN5, and the transmission period of the second SSB is 640 ms. If the electronic device performs SSB detection at the frequency domain positions corresponding to GSCN1-GSCN5 in a preset period of 80 ms in sequence. If the current frequency domain position is the frequency domain position corresponding to GSCN1, the next frequency domain position is the frequency domain position corresponding to GSCN2; if the current frequency domain position is the frequency domain position corresponding to GSCN2, the next frequency domain position is the frequency domain position corresponding to GSCN3, and so on.

[0097] As shown in FIG. 8, still assuming that the frequency band includes five GSCN (GSCN1-GSCN5) corresponding frequency domain positions, the satellite transmits the first SSB and the second SSB at the frequency domain position corresponding to GSCN5, and the transmission period of the second SSB is 640 ms. If the electronic device performs SSB detection at the frequency domain positions corresponding to GSCN1-GSCN5 in a preset period of 80 ms in sequence. If the current frequency domain position is the frequency domain position corresponding to GSCN1, the next frequency domain position is the frequency domain position corresponding to GSCN2; if the current frequency domain position is the frequency domain position corresponding to GSCN2, the next frequency domain position is the frequency domain position corresponding to GSCN3, and so on. As shown in FIG. 8, still assuming that the frequency band includes five GSCN (GSCN1-GSCN5) corresponding frequency domain positions, the satellite transmits the first SSB and the second SSB at the frequency domain position corresponding to GSCN5, and the transmission period of the second SSB is 640 ms. If the electronic device performs SSB detection at the frequency domain positions corresponding to GSCN1-GSCN5 in a preset period of 80 ms in sequence. If the current frequency domain position is the frequency domain position corresponding to GSCN1, the next frequency domain position is the frequency domain position corresponding to GSCN2; if the current frequency domain position is the frequency domain position corresponding to GSCN2, the next frequency domain position is the frequency domain position corresponding to GSCN3, and so on.

[0098] The SSB detection method, the electronic device and the network device provided by the embodiments of the present application, the network device transmits a burst of M-1 first SSBs and a burst of a second SSB at preset frequency domain positions within a time length of M preset periods, and M is a positive integer greater than 1. The first SSB is a simplified SSB, including a PSS, or the first SSB includes a PSS and an SSS; and the second SSB is a complete SSB, including a PSS, an SSS and a PBCH. The electronic device needs to detect the second SSB to successfully access the network. Accordingly, the electronic device detects the first SSB or the second SSB at each frequency domain position with a preset period, and the preset period is less than the transmission period of the second SSB. If the electronic device detects the first SSB at the current frequency domain position, it means that the second SSB also exists at the current frequency domain position, and therefore the electronic device continues to detect the second SSB at the current frequency domain position. If neither the first SSB nor the second SSB is detected at the current frequency domain position, it means that the second SSB does not exist at the current frequency domain position, and therefore the electronic device detects the first SSB or the second SSB at the next frequency domain position with the preset period. In this way, at each frequency domain position where no second SSB (also no first SSB) is transmitted, the electronic device does not need to detect the first SSB or the second SSB according to the period of the second SSB, but detects the first SSB or the second SSB with a preset period smaller than the transmission period of the second SSB, so that the time for detecting the SSB can be greatly reduced, the access speed of the electronic device can be greatly improved, and the access delay of the electronic device can be reduced.

[0099] The embodiments of the present application also provide a computer readable storage medium including instructions, when the instructions are executed on the electronic device or the network device, the electronic device or the network device performs each step in the above method embodiments, for example, the method shown in FIG. 6.

[0100] The embodiments of the present application also provide a computer program product including instructions, when the instructions are executed on the electronic device or the network device, the electronic device or the network device performs each step in the above method embodiments, for example, the method shown in FIG. 6.

[0101] The technical effects of the computer readable storage medium and the computer program product are referred to the technical effects of the above method embodiments.

[0102] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for detecting a synchronization signal block (SSB), the method comprising: receiving a signal; and detecting a synchronization signal block (SSB) based on the received signal. The method is applied to an electronic device and comprises: detecting a first SSB or a second SSB at each frequency domain position at a preset period; the first SSB comprises a primary synchronization signal (PSS), or the first SSB comprises the PSS and a secondary synchronization signal (SSS); the second SSB comprises the PSS, the SSS, and a physical layer broadcast channel (PBCH); a burst of M-1 first SSBs and a burst of one second SSB are included at a preset frequency domain position within a time length of M preset periods, and M is an integer greater than 1; the preset period is less than a transmission period of the second SSB; if the first SSB is detected at a current frequency domain position, continuing to detect the second SSB at the current frequency domain position; if the first SSB and the second SSB are not detected at the current frequency domain position, detecting the first SSB or the second SSB at a next frequency domain position at the preset period.

2. The method of claim 1, wherein, The method comprises: detecting a first SSB or a second SSB at each frequency domain position at N preset periods.

3. The method of claim 2, wherein, Further comprising: receiving a radio resource control (RRC) message from a network device, wherein the RRC message comprises a value of N.

4. The method according to any one of claims 1 to 3, characterized in that, The first SSB comprises period indication information, and the period indication information indicates a value of a transmission period of the second SSB. The method comprises:

5. The method of claim 4, wherein, continuing to detect the second SSB at the current frequency domain position at the transmission period of the second SSB according to the period indication information.

6. The method of claim 5, wherein, The period indication information is a pattern of the first SSB, and the pattern of the first SSB indicates that the first SSB comprises the PSS, or the first SSB comprises the PSS and the SSS.

7. The method of claim 4, wherein, The period indication information is a combination of patterns of a plurality of first SSBs.

8. The method according to any one of claims 1 to 7, characterized in that, A sequence number of a PSS sequence in the first SSB is used to determine the period indication information. Further comprising:

9. A method for detecting Synchronous Broadcast Block (SSB), characterized in that, receiving upper limit information of a period from a network device, and the preset period is less than the upper limit information of the period. The method is applied to a network device and comprises:

10. The method of claim 9, wherein, transmitting a burst of M-1 first SSBs and a burst of one second SSB at a preset frequency domain position within a time length of M preset periods; the first SSB comprises a primary synchronization signal (PSS), or the first SSB comprises the PSS and a secondary synchronization signal (SSS); the second SSB comprises the PSS, the SSS, and a physical layer broadcast channel (PBCH); and M is an integer greater than 1. Further comprising:

11. The method according to claim 9 or 10, characterized in that, transmitting a radio resource control (RRC) message to an electronic device, wherein the RRC message comprises a value of N, and the value of N is used to instruct the electronic device to detect the first SSB or the second SSB at N preset periods.

12. The method of claim 11, wherein, The first SSB comprises period indication information, and the period indication information indicates a value of a transmission period of the second SSB. The period indication information is a pattern of the first SSB, and the pattern of the first SSB indicates that the first SSB comprises the PSS, or the first SSB comprises the PSS and the SSS.

13. The method of claim 12, wherein, The period indication information is a combination of patterns of a plurality of the first SSBs.

14. The method of claim 11, wherein, A sequence number of a primary synchronization signal (PSS) sequence in the first SSB is used to determine the period indication information.

15. The method according to any one of claims 9 to 14, characterized in that, Further comprising: sending, to an electronic device, a period upper limit information, the electronic device detecting that a preset period of the first SSB or the second SSB is less than the period upper limit information.

16. An electronic device, comprising: comprising a processor and a memory, the memory storing instructions which, when executed by the processor, cause the electronic device to perform the method of any one of claims 1-8.

17. A network device, comprising: comprising a processor and a memory, the memory storing instructions which, when executed by the processor, cause the network device to perform the method of any one of claims 9-15.

18. A computer-readable storage medium, characterized in that, instructions stored thereon which, when executed on an electronic device, cause the electronic device to perform the method of any one of claims 1-8 and which, when executed on a network device, cause the network device to perform the method of any one of claims 9-15.

19. A computer program product, characterised in that, instructions stored thereon which, when executed on an electronic device, cause the electronic device to perform the method of any one of claims 1-8 and which, when executed on a network device, cause the network device to perform the method of any one of claims 9-15.

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