Synchronization signal block SSB transmission method and terminal device

Abstract

The application of the invention is a divisional application of 202080101248.0. The embodiment of the invention provides a transmission method of a synchronization signal block (SSB), terminal equipment and a computer readable storage medium, which are used for continuously transmitting the SSB after LBT fails before sending SSB resources, thereby improving the detection performance of the SSB. The embodiments of the present invention may comprise: a terminal device performing channel detection on a first carrier on a shared spectrum to determine the availability of at least one first time domain resource on the first carrier, each of the at least one first time domain resource being used for transmitting a synchronization signal block.

Description

[0001] This application is a divisional application of an invention patent application with an application date of May 28, 2020, application number 202080101248.0, and invention name “A transmission method and terminal device for a synchronization signal block SSB”. Technical Field

[0002] The present invention relates to the field of communications, and in particular to a synchronization signal block (SSB) transmission method and terminal equipment, and a computer-readable storage medium. Background Art

[0003] In the evolution of the Side Link (SL) system, device-to-device transmission may be supported on a shared spectrum. In this case, the terminal device needs to send a synchronization signal block (SSB) on the shared spectrum, where the SSB may include a sidelink synchronization signal block (Sidelink Synchronization Signal / Physical Sidelink Broadcast Channel Block, S-SS / PSBCH block or S-SSB). However, on the shared spectrum, if the terminal device fails to listen before talking (LBT) before sending the SSB resource, the terminal device cannot transmit the SSB, thereby affecting the detection performance of the SSB. Summary of the invention

[0004] An embodiment of the present invention provides a synchronization signal block (SSB) transmission method and terminal device, as well as a computer-readable storage medium, for continuing to perform LBT on other SSB resources to confirm whether SSB transmission can be performed after LBT fails before an SSB resource to be sent, thereby increasing the transmission opportunities of SSB on a shared spectrum.

[0005] A first aspect of an embodiment of the present invention provides a method for transmitting a synchronization signal block SSB, which may include: a terminal device performs channel detection on a first carrier on a shared spectrum to determine the availability of at least one first time domain resource on the first carrier, wherein each first time domain resource of the at least one first time domain resource is used to transmit a synchronization signal block.

[0006] Optionally, the terminal device performs channel detection on the first carrier on the shared spectrum, which may include: the terminal device uses a first channel access method to perform channel detection on the first carrier on the shared spectrum, wherein the first channel access method includes at least one of Type 1 channel access method, Type 2A channel access method, Type 2B channel access method and Type 2C channel access method.

[0007] Optionally, the at least one first time domain resource includes at least two first time domain resources, and the terminal device performs channel detection on the first carrier on the shared spectrum to determine the availability of at least one first time domain resource on the first carrier, which may include:

[0008] If the first first time domain resource in the at least one first time domain resource transmits a synchronization signal block, the terminal device performs channel detection using at least one of the Type2A channel access method, the Type2B channel access method, and the Type2C channel access method to determine the availability of at least one of the other first time domain resources in the at least one first time domain resource except the first first time domain resource; or,

[0009] If the first one of the at least one first time domain resource does not transmit a synchronization signal block, the terminal device uses the Type 1 channel access method or the Type 2A channel access method to perform channel detection to determine the availability of at least one of the other first time domain resources in the at least one first time domain resource except the first one.

[0010] Optionally, the first first time domain resource transmitting a synchronization signal block may include: the terminal device sending a synchronization signal block through the first first time domain resource, or the terminal device detecting a synchronization signal block through the first first time domain resource; or,

[0011] The first first time domain resource does not transmit a synchronization signal block, which may include: the terminal device sends a synchronization signal block through the first first time domain resource, and the terminal device detects the synchronization signal block through the first first time domain resource.

[0012] Optionally, the terminal device performs channel detection on the first carrier on the shared spectrum to determine the availability of at least one first time domain resource on the first carrier, which may include: the terminal device uses the Type 1 channel access method or the Type 2A channel access method to perform channel detection on the first carrier to determine the availability of the first first time domain resource among the at least one first time domain resource.

[0013] Optionally, the at least one first time domain resource includes at least two first time domain resources, and the terminal device uses the first channel access method to perform channel detection on the first carrier on the shared spectrum to determine the availability of at least one first time domain resource on the first carrier, which may include: the terminal device uses at least one of the Type2A channel access method, the Type2B channel access method, and the Type2C channel access method to perform channel detection on the first carrier to determine the availability of at least one of the other first time domain resources in the at least one first time domain resource except the first first time domain resource.

[0014] Optionally, the information of the at least one first time domain resource is preset or configured by the first device, wherein the information of the at least one first time domain resource includes at least one of the time domain position, frequency domain position and number of the at least one first time domain resource.

[0015] Optionally, the first device includes a network device or a terminal device with control rights.

[0016] Optionally, the at least one first time domain resource includes at least two first time domain resources, wherein the at least two first time domain resources have the same quasi-co-located QCL relationship, or the at least two first time domain resources are used to transmit synchronization signal blocks having the same QCL relationship, or the at least two first time domain resources are used to transmit synchronization signal blocks having the same index.

[0017] Optionally, the at least one first time domain resource includes at least two first time domain resources, wherein the at least two first time domain resources do not have the same QCL relationship, or the at least two first time domain resources are used to transmit synchronization signal blocks that do not have the same QCL relationship, or the at least two first time domain resources are used to transmit synchronization signal blocks with the same index.

[0018] Optionally, the at least one first time domain resource includes at least two first time domain resources, wherein at least two adjacent first time domain resources included in the at least two first time domain resources are continuous in the time domain; or, a first interval in the time domain between two adjacent first time domain resources among the at least two first time domain resources includes N symbols, where N is a positive integer; or, a second interval in the time domain between two adjacent first time domain resources among the at least two first time domain resources includes M time slots, where M is a positive integer.

[0019] Optionally, the value of N is determined based on the subcarrier spacing of the synchronization signal block.

[0020] Optionally, the N symbols are used by the terminal device to perform channel access using at least one of Type2A channel access mode, Type2B channel access mode and Type2C channel access mode, or the N symbols are used by the terminal device to perform transmit-receive conversion or transmit-receive conversion.

[0021] Optionally, the at least one first time domain resource is a resource included in at least one time slot, and each time slot in the at least one time slot includes a first time domain resource.

[0022] Optionally, the first time domain resource occupies symbols 0 to 12 in a time slot in the time domain; or, the first time domain resource occupies symbols 1 to 13 in a time slot in the time domain; or, the first time domain resource occupies symbols 1 to 12 in a time slot in the time domain.

[0023] Optionally, if the first time domain resource does not occupy symbol 0 in a time slot in the time domain, the symbol 0 is used to repeatedly transmit symbol 1; or, the symbol 0 is used to transmit an extended part of the cyclic prefix CP of symbol 1; or, the symbol 0 is used for the terminal device to perform automatic gain control AGC adjustment.

[0024] Optionally, if the first time domain resource does not occupy symbol 13 in a time slot in the time domain, the symbol 13 is used to transmit the extended part of the cyclic prefix CP of the symbol 0 in the next time slot; or, the symbol 13 is used by the terminal device to perform automatic gain control AGC adjustment; or, the symbol 13 is used by the terminal device to perform transmit-receive conversion or transmit-receive conversion.

[0025] Optionally, the at least one first time domain resource is a resource included in at least one time slot, and each time slot in the at least one time slot includes P first time domain resources, where P is a positive integer greater than or equal to 2.

[0026] Optionally, two adjacent first time domain resources among the P first time domain resources are continuous in the time domain.

[0027] Optionally, a third interval in the time domain between two adjacent first time domain resources among the P first time domain resources includes Q symbols, where Q is a positive integer.

[0028] Optionally, the Q symbols are used by the terminal device to perform channel access using at least one of Type2A channel access mode, Type2B channel access mode and Type2C channel access mode, or the N symbols are used by the terminal device to perform transmit-receive conversion or transmit-receive conversion.

[0029] Optionally, the Q symbols are used by the terminal device to transmit an extended portion of the cyclic prefix CP of the first symbol after the Q symbols.

[0030] Optionally, the method may further include: when the terminal device determines, based on channel detection, that at least one of the at least one first time domain resources is available, the terminal device sends a synchronization signal block through the at least one available first time domain resource.

[0031] Optionally, the terminal device sending a synchronization signal block through at least one available first time domain resource may include:

[0032] The terminal device sends a synchronization signal block on each first time domain resource of the at least one available first time domain resource; or,

[0033] The terminal device sends a synchronization signal block on a first time domain resource of the at least one available first time domain resource; or,

[0034] In the case where the at least one available first time domain resource includes S available first time domain resources, the terminal device sends S synchronization signal blocks on the S available first time domain resources, wherein at least two synchronization signal blocks of the S synchronization signal blocks do not have the same QCL relationship, and S is an integer greater than or equal to 2.

[0035] Optionally, the synchronization signal block includes at least one of a primary synchronization signal, a secondary synchronization signal and a physical broadcast channel.

[0036] A second aspect of an embodiment of the present invention provides a terminal device having a function of increasing the transmission opportunity of S-SSB on a shared spectrum. The function can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0037] Another aspect of an embodiment of the present invention provides a terminal device, comprising: a memory storing executable program code; a processor coupled to the memory; the processor calls the executable program code stored in the memory to execute the method described in the first aspect of the embodiment of the present invention.

[0038] Another aspect of an embodiment of the present invention provides a computer-readable storage medium, comprising instructions, which, when executed on a computer, enables the computer to execute the method as described in the first aspect of the present invention.

[0039] Yet another aspect of an embodiment of the present invention provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the method as described in the first aspect of the present invention.

[0040] Another aspect of an embodiment of the present invention provides a chip, which is coupled to a memory in the terminal device, so that the chip calls program instructions stored in the memory during operation, so that the terminal device executes the method described in the first aspect of the present invention.

[0041] In the technical solution provided by the embodiment of the present invention, the terminal device performs channel detection on the first carrier on the shared spectrum to determine the availability of at least one first time domain resource on the first carrier, wherein each of the at least one first time domain resource is used to transmit a synchronization signal block. If the terminal device fails to perform LBT before an SSB resource, the terminal device can perform LBT for another SSB resource, and after the LBT succeeds, transmit the SSB through the SSB resource, thereby increasing the transmission opportunity of the SSB. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1A A schematic diagram of a terminal in a D2D system sending or receiving data;

[0043] Figure 1B A schematic diagram of a partial SSB pattern with respect to FR1 in different situations in the NR system;

[0044] Figure 1C A schematic diagram of a partial SSB pattern of FR2 under different conditions in the NR system;

[0045] Figure 1D Schematic diagram of the S-SSB structure in a time slot in the NR sidelink system;

[0046] Figure 1E A schematic diagram of a terminal device sending an S-SSB in each S-SSB transmission period;

[0047] Figure 2 A system architecture diagram of a communication system used in an embodiment of the present invention;

[0048] Figure 3 Schematic diagram of an embodiment of a method for transmitting a synchronization signal block SSB in an embodiment of the present invention;

[0049] Figure 4A It is a schematic diagram of two consecutive time slots including a first time domain resource in an embodiment of the present invention;

[0050] Figure 4B This is a schematic diagram of two adjacent first time domain resources among P first time domain resources in an embodiment of the present invention being continuous in the time domain;

[0051] Figure 4CIt is a schematic diagram that a third interval in the time domain between two adjacent first time domain resources among P first time domain resources in an embodiment of the present invention includes Q symbols;

[0052] Figure 4D This is another schematic diagram of a third interval in the time domain between two adjacent first time domain resources among the P first time domain resources in an embodiment of the present invention including Q symbols;

[0053] Figure 4E It is a schematic diagram of two groups of SSB resources included in a synchronization signal transmission period in an embodiment of the present invention;

[0054] Figure 4F Schematic diagram of each group of SSB resources in a synchronization signal transmission period in an embodiment of the present invention;

[0055] Figure 5A A schematic diagram of an embodiment of a terminal device in an embodiment of the present invention;

[0056] Figure 5B A schematic diagram of another embodiment of a terminal device in an embodiment of the present invention;

[0057] Figure 6 FIG. 2 is a schematic diagram of another embodiment of a terminal device in an embodiment of the present invention. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0059] The following is a brief description of some of the terms involved in this application, as follows:

[0060] The research of the next generation (mobile communication system) (New radio, NR) system currently mainly considers two frequency bands, frequency band FR1 (Frequency range 1) and frequency band FR2 (Frequency range 2), wherein the frequency domain ranges included in FR1 and FR2 are shown in Table 1. It should be understood that the embodiments of the present application can be applied to the FR1 and FR2 frequency bands, and can also be applied to other frequency bands, such as the frequency band of 52.6 GHz to 71 GHz, or the frequency band of 71 GHz to 100 GHz, etc., and the present application is not limited to this.

[0061] Frequency band definition Corresponding frequency range FR1 410MHz–7.125GHz FR2 24.25GHz–52.6GHz

[0062] Table 1

[0063] 1. Shared spectrum

[0064] Shared spectrum includes unlicensed spectrum. Unlicensed spectrum is a spectrum that can be used for communication by communication devices divided by countries and regions. Communication devices in different communication systems can use this spectrum as long as they meet the regulatory requirements set by the country or region on this spectrum, without having to apply for exclusive spectrum authorization from the government.

[0065] In order to allow various communication systems that use unlicensed spectrum for wireless communication to coexist in a friendly manner on the spectrum, some countries or regions have stipulated some regulatory requirements that must be met when using unlicensed spectrum. For example, the communication device follows the "Listen Before Talk (LBT)" principle, that is, before the communication device sends a signal on the channel of the unlicensed spectrum, it needs to first perform channel sensing. Only when the channel sensing result is that the channel is idle, the communication device can send a signal; if the channel sensing result of the communication device on the channel of the unlicensed spectrum is that the channel is busy, then the communication device cannot send a signal. For another example, in order to ensure fairness, in one transmission, the duration of the communication device using the channel of the unlicensed spectrum for signal transmission cannot exceed a certain length of time. For another example, in order to avoid the power of the signal transmitted on the channel of the unlicensed spectrum being too large and affecting the transmission of other important signals on the channel, the communication device needs to follow the limit of not exceeding the maximum power spectral density when using the channel of the unlicensed spectrum for signal transmission, and so on.

[0066] 2. Device to Device (D2D) / Vehicle to Everything (V2X)

[0067] D2D communication is a transmission technology based on side link (SL). Different from the traditional cellular system in which communication data is received or sent by base stations, the D2D system adopts terminal-to-terminal direct communication, so it has higher spectrum efficiency and lower transmission delay.

[0068] In a D2D system, when a terminal sends sideline data, other terminals around it can receive the sideline data. At different times, the terminals sending data may be different. Therefore, the terminal sends data in the first time slot and needs to receive data sent by other terminals in the second time slot. Therefore, the last symbol of each time slot is used as a guard period (GP). No data is sent in this symbol, which is used for the terminal to perform send-receive (or send-receive) conversion. Figure 1A FIG. 1 is a schematic diagram of a terminal in a D2D system sending or receiving data.

[0069] 3. Next generation (mobile communication system) (New radio, NR) synchronization signal block (Synchronizing Signal / PBCH Block, SSB) pattern

[0070] In the NR system, the synchronization signal block (Synchronization Signal / Physical Broadcast Channel, PBCH) Block, SSB or SS / PBCH block) pattern supported by FR1 includes 3 cases (Case A, Case B, Case C), and the SSB pattern supported by FR2 includes 2 cases (Case D, Case E). Among them, an SSB transmission opportunity can include one or more SSBs, and an SSB includes 4 symbols in the time domain. A group of SSBs should be transmitted within one half frame (5ms). Assume that the index of the first symbol of the first time slot in a half frame is symbol 0:

[0071] (1) Case A-15kHz subcarrier spacing:

[0072] 1) The index of the first symbol of SSB includes {2,8}+14*n;

[0073] 2) For non-shared spectrum:

[0074] ① Carrier frequency is less than or equal to 3GHz, n = 0, 1;

[0075] ②The carrier frequency in FR1 is greater than 3GHz, n=0,1,2,3;

[0076] 3) For shared spectrum, n = 0, 1, 2, 3, 4.

[0077] (2) Case B-30kHz subcarrier spacing:

[0078] 1) The index of the first symbol of SSB includes {4,8,16,20}+28*n;

[0079] ① Carrier frequency is less than or equal to 3GHz, n = 0;

[0080] ②The carrier frequency in FR1 is greater than 3GHz, n=0,1.

[0081] (3) Case C - 30kHz subcarrier spacing:

[0082] 1) The index of the first symbol of SSB includes {2,8}+14*n;

[0083] 2) For non-shared spectrum and paired spectrum (such as frequency division duplex (FDD) scenario);

[0084] ① Carrier frequency is less than or equal to 3GHz, n = 0, 1;

[0085] ②The carrier frequency in FR1 is greater than 3GHz, n=0,1,2,3;

[0086] 3) For non-shared spectrum and non-paired spectrum (such as Time Division Duplex (TDD) scenario);

[0087] ① Carrier frequency is less than or equal to 2.4GHz, n=0,1;

[0088] ②The carrier frequency in FR1 is greater than 2.4GHz, n=0,1,2,3.

[0089] like Figure 1B FIG. 1 is a schematic diagram of a partial SSB pattern regarding FR1 under different conditions in a NR system.

[0090] 4) For shared spectrum, n = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.

[0091] (4) Case D-120kHz subcarrier spacing:

[0092] 1) The index of the first symbol of SSB includes {4,8,16,20}+28*n;

[0093] ①For the carrier frequencies within FR2, n=0,1,2,3,5,6,7,8,10,11,12,13,15,16,17,18.

[0094] (5) Case E - 240kHz subcarrier spacing:

[0095] 1) The index of the first symbol of SSB includes {8, 12, 16, 20, 32, 36, 40, 44} + 56*n;

[0096] ①For the carrier frequency within FR2, n=0,1,2,3,5,6,7,8.

[0097] like Figure 1C FIG. 1 is a schematic diagram of a partial SSB pattern regarding FR2 under different conditions in a NR system. FIG.

[0098] 4. NR Sidelink Synchronization Signal / Physical SidelinkBroadcast Channel Block, S-SS / PSBCH block or S-SSB) pattern

[0099] In the NR sidelink system, the structure of S-SSB is different from that of SSB in the NR system. Figure 1D The figure shows a schematic diagram of the S-SSB structure in a time slot in the NR sidelink system. Among them, a time slot includes one S-SSB, and one S-SSB includes 11 resource blocks (RBs) in the frequency domain. In the time domain, the sidelink primary synchronization signal (Sidelink Primary Synchronization Signal, S-PSS) and the sidelink secondary synchronization signal (Sidelink Secondary Synchronization Signal, S-SSS) include 2 symbols respectively, and the physical sidelink broadcast channel (Physical Sidelink Broadcast Channel, PSBCH) includes 9 symbols, namely symbol 0, symbol 5 to symbol 12, and the last symbol is GP, which is used for transceiver conversion or transceiver conversion.

[0100] As an example, in the time domain, the S-SSB transmission period is 160ms, and the number of S-SSBs that can be included in each S-SSB transmission period is as follows:

[0101] (1) For FR1

[0102] For 15kHz subcarrier spacing (SCS), {1}

[0103] For 30kHz SCS, {1,2}

[0104] For 60kHz SCS, {1,2,4}

[0105] (2) For FR2

[0106] For 60kHz SCS, {1,2,4,8,16,32}

[0107] For 120kHz SCS, {1,2,4,8,16,32,64}

[0108] For one S-SSB, two S-SSB resources are included in one S-SSB transmission cycle, wherein the terminal device performs S-SSB detection on one S-SSB resource, and after detecting the S-SSB, forwards the detected S-SSB on another S-SSB resource. Figure 1E A schematic diagram of a terminal device sending S-SSB in each S-SSB transmission period.

[0109] 5. Channel access scheme on shared spectrum

[0110] On the shared spectrum, it should be noted that the mode in which the communication device obtains channel occupancy can be a channel access mode based on load based equipment (LBE), that is, the communication device can perform LBT on the shared channel after the service arrives, and start transmission on the shared channel after the LBT is successful; it can also be a channel access mode based on frame structure equipment (FBE), that is, the communication device periodically performs LBT on the shared channel. Among them, the channel access mode based on FBE can also be called a semi-static channel access mode. The channel access mode based on LBE can include a variety of different channel access schemes, as shown below. Under normal circumstances, it can be considered that the Type 2 channel access scheme has a higher priority than the Type 1 channel access scheme:

[0111] Type 1 channel access:

[0112] The channel detection mode of the communication device is multi-detection time slot channel detection with random backoff based on contention window size adjustment. Specifically, under Type 1 channel access, different channel access priorities (Channel access priority class, CAPC) may be included according to the priority of the transmission service.

[0113] Type2A channel access:

[0114] The channel detection method of the communication device is to perform channel detection with a fixed detection time slot length of 25 microseconds. Specifically, under Type 2A channel access, the communication device can perform 25 microseconds of channel detection before starting transmission, and transmit after the channel detection is successful.

[0115] Type2B channel access:

[0116] The channel detection method of the communication device is to perform channel detection with a fixed detection time slot length of 16 microseconds. Specifically, under Type2B channel access, the communication device can perform 16 microseconds of channel detection before the start of transmission, and transmit after the channel detection is successful. Optionally, the gap between the start position of the transmission and the end position of the previous transmission is 16 microseconds.

[0117] Type2C channel access:

[0118] The communication device transmits without performing channel detection. Specifically, under Type 2C channel access, the communication device can directly transmit after the gap ends, wherein the gap between the start position of the transmission and the end position of the previous transmission is less than or equal to 16 microseconds. Optionally, the length of the transmission under this channel access mode does not exceed 584 microseconds.

[0119] For FBE channel access mode:

[0120] The frame structure appears periodically, and a frame structure includes a fixed frame period (length not exceeding a preset value, such as 10ms), channel occupancy time (length not exceeding 95% of the fixed frame period length), and idle time (length is at least 5% of the channel occupancy time, with a minimum value of 100us, and is located at the end of the fixed frame period). The network device performs LBT on the channel on the shared spectrum during the idle time (for example, it can be a channel detection of a fixed time slot length). If LBT is successful, the channel occupancy time in the next fixed frame period can be used to transmit signals; if LBT fails, the channel occupancy time in the next fixed frame period cannot be used to transmit signals. In other words, the channel resources that communication equipment can use for service transmission appear periodically.

[0121] In the evolution of SL systems, device-to-device transmission may be supported on shared spectrum. In this case, the terminal device needs to send SSB (e.g., S-SSB) on the shared spectrum. However, on the shared spectrum, if the terminal device fails LBT before sending SSB resources, the terminal device cannot transmit SSB, which affects the detection performance of SSB. Therefore, new enhancement solutions need to be considered for SSB transmission.

[0122] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity) system. Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.

[0123] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device to device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), vehicle to vehicle (V2V) communication, or vehicle to everything (V2X) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0124] Optionally, the communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, or a standalone (SA) networking scenario.

[0125] Optionally, the communication system in the embodiment of the present application can be applied to an unlicensed spectrum, wherein the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to an authorized spectrum, wherein the authorized spectrum can also be considered as an unshared spectrum.

[0126] The embodiments of the present application describe various embodiments in conjunction with network devices and terminal devices, wherein the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

[0127] The terminal device can be a station (STAION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a next-generation communication system such as an NR network, or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0128] In the embodiments of the present application, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as ships, etc.); it can also be deployed in the air (for example, on airplanes, balloons and satellites, etc.).

[0129] In the embodiment of the present application, the terminal device can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self driving, a wireless terminal device in remote medical, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home, etc.

[0130] As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.

[0131] In an embodiment of the present application, the network device may be a device for communicating with a mobile device. The network device may be an access point (AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (EvolutionalNode B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and a network device (gNB) in an NR network, or a network device in a future evolved PLMN network, or a network device in an NTN network, etc.

[0132] As an example but not limitation, in an embodiment of the present application, the network device may have a mobile characteristic, for example, the network device may be a mobile device. Optionally, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Optionally, the network device may also be a base station set up in a location such as land or water.

[0133] In an embodiment of the present application, the network device can provide services for a cell, and the terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell can be a cell corresponding to the network device (for example, a base station), and the cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0134] like Figure 2 As shown, it is a system architecture diagram of a communication system applied in an embodiment of the present invention. The communication system may include a network device, which may be a device that communicates with a terminal device (or referred to as a communication terminal or terminal). The network device can provide communication coverage for a specific geographical area and can communicate with terminal devices located in the coverage area. Figure 2 An exemplary embodiment shows a network device and two terminal devices. Optionally, the communication system may include multiple network devices and each network device may include other number of terminal devices within its coverage area, which is not limited in the present embodiment. Optionally, the communication system may also include other network entities such as a network controller and a mobility management entity, which is not limited in the present embodiment.

[0135] Among them, the network equipment may include access network equipment and core network equipment. That is, the wireless communication system also includes multiple core networks for communicating with the access network equipment. The access network equipment may be an evolutionary base station (evolutional node B, referred to as eNB or e-NodeB) macro base station, micro base station (also called "small base station"), micro-micro base station, access point (AP), transmission point (TP) or new generation base station (new generation Node B, gNodeB) in a long-term evolution (LTE) system, a next-generation (mobile communication system) (next radio, NR) system or an authorized auxiliary access long-term evolution (LAA-LTE) system.

[0136] It should be understood that the device with communication function in the network / system in the embodiment of the present application can be referred to as a communication device. Figure 2 Taking the communication system shown as an example, the communication equipment may include network equipment and terminal equipment with communication functions. The network equipment and terminal equipment may be specific equipment described in the embodiments of the present invention, which will not be repeated here; the communication equipment may also include other equipment in the communication system, such as network controllers, mobile management entities and other network entities, which are not limited to the embodiments of the present application.

[0137] It should be understood that the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0138] It should be understood that the "indication" mentioned in the embodiments of the present application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B.

[0139] Optionally, the indication information in the embodiment of the present application includes at least one of physical layer signaling such as downlink control information (Downlink Control Information, DCI), radio resource control (Radio Resource Control, RRC) signaling and media access control element (Media Access Control Control Element, MAC CE).

[0140] Optionally, the scenarios to which the embodiments of the present application are applied may include scenarios in which terminal devices are directly connected.

[0141] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between two items, or an association relationship between the two items, or a relationship between indication and being indicated, configuration and being configured, and the like.

[0142] To facilitate understanding of the technical solutions of the embodiments of the present application, the following is an explanation of the related technologies of the embodiments of the present application. The following related technologies can be combined with the technical solutions of the embodiments of the present application as optional solutions, and they all belong to the protection scope of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0143] like Figure 3 As shown, it is a schematic diagram of an embodiment of a method for transmitting a synchronization signal block SSB in an embodiment of the present invention, which may include:

[0144] 301. The terminal device performs channel detection on a first carrier on a shared spectrum to determine availability of at least one first time domain resource on the first carrier, wherein each first time domain resource of the at least one first time domain resource is used to transmit a synchronization signal block.

[0145] It can be understood that the first time domain resource includes an SSB resource. Optionally, the SSB resource includes an S-SSB resource.

[0146] It can be understood that the terminal device uses a first channel access method to perform channel detection on the first carrier on the shared spectrum. Optionally, the first channel access method includes at least one of Type 1 channel access method, Type 2A channel access method, Type 2B channel access method and Type 2C channel access method.

[0147] The terminal device performs channel detection on the first carrier on the shared spectrum to determine the availability of at least one first time domain resource on the first carrier, which may include but is not limited to the following situations:

[0148] (1) The terminal device performs channel detection on the first carrier using the Type 1 channel access method or the Type 2A channel access method to determine availability of a first first time domain resource among the at least one first time domain resource.

[0149] (2) In the case where the at least one first time domain resource includes at least two first time domain resources, if the first first time domain resource in the at least one first time domain resource transmits a synchronization signal block, the terminal device uses at least one of the Type2A channel access method, the Type2B channel access method and the Type2C channel access method to perform channel detection to determine the availability of at least one of the other first time domain resources in the at least one first time domain resource except the first first time domain resource. In this implementation, when the terminal device obtains the channel occupancy time (COT), for the resources in the COT, a higher priority channel access method can be used to ensure that the higher priority resources are transmitted.

[0150] Optionally, the first first time domain resource transmitting a synchronization signal block may include: the terminal device sending a synchronization signal block through the first first time domain resource, or the terminal device detecting a synchronization signal block through the first first time domain resource. Optionally, the synchronization signal block detected by the terminal device through the first first time domain resource may be sent by other terminal devices, or the synchronization signal block detected by the terminal device through the first first time domain resource may be sent by a network device.

[0151] (3) In the case where the at least one first time domain resource includes at least two first time domain resources, if the first first time domain resource in the at least one first time domain resource does not transmit a synchronization signal block, the terminal device uses the Type 1 channel access method or the Type 2A channel access method to perform channel detection to determine the availability of at least one of the other first time domain resources in the at least one first time domain resource except the first first time domain resource. In this implementation, when the terminal device does not obtain the COT, it is necessary to use the Type 1 or Type 2A channel access method to ensure fairness in the use of resources on the shared spectrum.

[0152] Optionally, the first first time domain resource does not transmit a synchronization signal block, which may include: the terminal device does not send a synchronization signal block through the first first time domain resource, and the terminal device does not detect a synchronization signal block through the first first time domain resource.

[0153] (4) In the case where the at least one first time domain resource includes at least two first time domain resources, the terminal device uses at least one of the Type2A channel access method, the Type2B channel access method and the Type2C channel access method to perform channel detection on the first carrier to determine the availability of at least one of the other first time domain resources in the at least one first time domain resource except the first first time domain resource.

[0154] Optionally, the information of the at least one first time domain resource is preset or configured by the first device, wherein the information of the at least one first time domain resource includes at least one of the time domain position, frequency domain position and number of the at least one first time domain resource. It can also be expressed as: the time domain position of the at least one first time domain resource is preset or configured by the first device; and / or, the frequency domain position of the at least one first time domain resource is preset or configured by the first device; and / or, the number of the at least one first time domain resource is preset or configured by the first device. The first device may include a network device or a terminal device with control rights.

[0155] Optionally, in an embodiment of the present application, the first device configuration includes: the first device is indicated through indication information.

[0156] Optionally, the at least one first time domain resource includes at least two first time domain resources, wherein the at least two first time domain resources have the same quasi co-location (QCL) relationship, or the at least two first time domain resources are used to transmit synchronization signal blocks having the same QCL relationship, or the at least two first time domain resources are used to transmit synchronization signal blocks having the same index. In this implementation, providing multiple transmission opportunities for the transmission of SSB can increase the probability of a terminal device sending an SSB.

[0157] Optionally, the at least one first time domain resource includes at least two first time domain resources, wherein the at least two first time domain resources do not have the same QCL relationship, or the at least two first time domain resources are used to transmit synchronization signal blocks that do not have the same QCL relationship, or the at least two first time domain resources are used to transmit synchronization signal blocks that do not have the same index, or the receiving device assumes that the SSB transmitted on the at least two first time domain resources do not have the same QCL relationship when receiving the SSB through the at least two first time domain resources. In this implementation, different SSB resources are used to transmit SSBs in different directions, which can increase the probability that terminal devices in different directions receive the SSB.

[0158] It should be noted that having the same QCL relationship can be considered as having the same beam direction. Synchronous signal blocks with the same index are SSBs with the same SSB index.

[0159] Optionally, the at least one first time domain resource includes at least two first time domain resources. Wherein, (1) at least two adjacent first time domain resources included in the at least two first time domain resources are continuous in the time domain; it can be understood that the SSB resources in each time slot are continuous, but the SSB resources between different time slots can be separated by an integer number of symbols.

[0160] Or, (2) the first interval in the time domain between two adjacent first time domain resources of the at least two first time domain resources includes N symbols, where N is a positive integer; it can be understood that the first intervals corresponding to different two adjacent first time domain resources may be the same or different. For example, at least two first time domain resources include SSB resource 0, SSB resource 1, SSB resource 2, and SSB resource 3, wherein there is a symbol interval between SSB resource 0 and SSB resource 1, there are 2 symbols intervals between SSB resource 1 and SSB resource 2, and there is a symbol interval between SSB resource 2 and SSB resource 3. Optionally, the value of N is determined according to the subcarrier spacing of the synchronization signal block. Optionally, the N symbols are used by the terminal device to perform channel access using at least one of the Type 2A channel access method, the Type 2B channel access method, and the Type 2C channel access method, or the N symbols are used by the terminal device to perform transceiver conversion or transceiver conversion.

[0161] Example 1: If the subcarrier interval corresponding to the synchronization signal block is 15kHz or 30kHz, N is 1, and the first interval includes approximately 72 microseconds (for example, corresponding to 15kHz) or 36 microseconds (for example, corresponding to 30kHz), the terminal device can perform channel detection through Type2A channel access method, Type2B channel access method or Type2C channel access method through the first interval, or the terminal device can complete the transmit-receive conversion or the transmit-receive conversion through the first interval.

[0162] Example 2: If the subcarrier spacing corresponding to the synchronization signal block is 60kHz, N is 1 or 2.

[0163] For example, N takes a value of 2, and the first interval includes approximately 36 microseconds. The terminal device can perform channel detection using Type 2A channel access, Type 2B channel access, or Type 2C channel access through the first interval, or the terminal device can complete transmit-receive conversion or transmit-receive conversion through the first interval.

[0164] For example, N takes a value of 1, and the first interval includes approximately 18 microseconds. The terminal device can perform channel detection using a Type 2B channel access method or a Type 2C channel access method through the first interval, or the terminal device can complete a transmit-receive conversion or a transmit-receive conversion through the first interval.

[0165] Example 3: If the subcarrier spacing corresponding to the synchronization signal block is 120kHz, the value of N is 1, 2 or 3.

[0166] For example, N takes a value of 3, and the first interval includes approximately 27 microseconds. The terminal device can perform channel detection using Type 2A channel access, Type 2B channel access, or Type 2C channel access, or the terminal device can complete transmit-receive conversion or transmit-receive conversion using the first interval.

[0167] For example, N takes a value of 2, and the first interval includes approximately 18 microseconds. The terminal device can perform channel detection using the Type 2B channel access method or the Type 2C channel access method through the first interval, or the terminal device can complete the transmit-receive conversion or the transmit-receive conversion through the first interval.

[0168] For example, N takes a value of 1, and the first interval includes approximately 9 microseconds. The terminal device can perform channel detection using the Type 2C channel access method through the first interval, or the terminal device can complete the transmit-receive conversion or the transmit-receive conversion through the first interval.

[0169] Or, (3) the second interval in the time domain between two adjacent first time domain resources of the at least two first time domain resources includes M time slots, where M is an integer. It can be understood that the second intervals corresponding to different two adjacent first time domain resources may be the same or different. For example, the at least two first time domain resources include SSB resource 0, SSB resource 1, SSB resource 2, and SSB resource 3, wherein SSB resource 0 and SSB resource 1 are separated by 0 time slots (i.e., the time slot where SSB resource 0 is located and the time slot where SSB resource 1 is located are continuous in the time domain), SSB resource 1 and SSB resource 2 are separated by 1 time slot, and SSB resource 2 and SSB resource 3 are separated by 0 time slots.

[0170] The following describes at least one time domain resource:

[0171] Case 1: The at least one first time domain resource is a resource included in at least one time slot, and each time slot in the at least one time slot includes a first time domain resource. Figure 4A As shown, it is a schematic diagram that two consecutive time slots include a first time domain resource in an embodiment of the present invention.

[0172] The first time domain resource may occupy a symbol in a time slot in the time domain in the following ways, as shown below:

[0173] (1) The first time domain resource occupies symbols 0 to 12 in a time slot in the time domain.

[0174] (2) The first time domain resource occupies symbols 1 to 13 in a time slot in the time domain.

[0175] (3) The first time domain resource occupies symbols 1 to 12 in a time slot in the time domain.

[0176] Optionally, if the first time domain resource does not occupy symbol 0 in a time slot in the time domain, the symbol 0 is used to repeatedly transmit symbol 1; or, the symbol 0 is used to transmit an extended part of the cyclic prefix CP of symbol 1; or, the symbol 0 is used for the terminal device to perform automatic gain control (AGC) adjustment.

[0177] Optionally, if the first time domain resource does not occupy symbol 13 in a time slot in the time domain, the symbol 13 is used to transmit the extended part of the cyclic prefix (CP) of symbol 0 in the next time slot; or, the symbol 13 is used by the terminal device to perform automatic gain control AGC adjustment; or, the symbol 13 is used by the terminal device to perform transmit-receive conversion or transmit-receive conversion.

[0178] Case 2: the at least one first time domain resource is a resource included in at least one time slot, each time slot in the at least one time slot includes P first time domain resources, and P is a positive integer greater than or equal to 2.

[0179] Optionally, two adjacent first time domain resources among the P first time domain resources are continuous in the time domain. Figure 4B , which is a schematic diagram of two adjacent first time domain resources among P first time domain resources in an embodiment of the present invention being continuous in the time domain. Figure 4B As shown, one time slot includes 3 SSBs, and each SSB includes 4 symbols.

[0180] Optionally, a third interval in the time domain between two adjacent first time domain resources among the P first time domain resources includes Q symbols, where Q is a positive integer. Figure 4C and Figure 4D As shown, it is a schematic diagram that a third interval in the time domain between two adjacent first time domain resources among P first time domain resources in an embodiment of the present invention includes Q symbols.

[0181] Optionally, the Q symbols are used by the terminal device to perform channel access using at least one of Type2A channel access method, Type2B channel access method and Type2C channel access method, or the N symbols are used by the terminal device to perform transmit-receive conversion or transmit-receive conversion.

[0182] Optionally, the Q symbols are used by the terminal device to transmit an extension of the cyclic prefix CP of the first symbol after the Q symbols, so as to ensure that the GAP in the Q symbols meets the requirements corresponding to the channel access method.

[0183] Case 3: The at least one first time domain resource is a resource included in at least one time slot, and the pattern of the first time domain resource included in each time slot in the at least one time slot is the same as the synchronization signal block pattern supported by FR1, or the pattern of the first time domain resource included in each time slot in the at least one time slot is the same as the synchronization signal block pattern supported by FR2.

[0184] 302. When the terminal device determines, based on channel detection, that at least one of the at least one first time domain resources is available, the terminal device sends a synchronization signal block through the at least one available first time domain resource.

[0185] Optionally, the terminal device sends a synchronization signal block through at least one available first time domain resource, which may include but is not limited to the following implementations: (1) the terminal device sends a synchronization signal block on each first time domain resource in the at least one available first time domain resource; or, (2) the terminal device sends a synchronization signal block on one first time domain resource in the at least one available first time domain resource; or, (3) when the at least one available first time domain resource includes S available first time domain resources, the terminal device sends S synchronization signal blocks on the S available first time domain resources, wherein at least two of the S synchronization signal blocks do not have the same QCL relationship, and S is an integer greater than or equal to 2. It should be noted that step 302 is an optional step.

[0186] Optionally, the synchronization signal block includes at least one of a primary synchronization signal, a secondary synchronization signal and a physical broadcast channel.

[0187] Optionally, the primary synchronization signal includes a sidelink primary synchronization signal (S-PSS); the secondary synchronization signal includes a sidelink secondary synchronization signal (S-SSS); and the physical broadcast channel includes a physical sidelink broadcast channel (PSBCH).

[0188] The technical solution of the present invention is described below by way of examples. Figure 4EAs shown in FIG. 1 , it is a schematic diagram of two groups of SSB resources included in the synchronization signal transmission cycle in an embodiment of the present invention. Figure 4F FIG. 1 is a schematic diagram of each group of SSB resources in a synchronization signal transmission cycle in an embodiment of the present invention. Figure 4E and Figure 4F As shown, on the first carrier, it is assumed that the terminal device in the system needs to transmit an SSB, such as S-SSB0. Two groups of SSB resources are included in the synchronization signal transmission period, wherein one group of SSB resources is used for the terminal device to detect SSB0, and the other group of SSB resources is used for the terminal device to send SSB0, each group of SSB resources includes L=2 SSB resources, the two SSB resources are located in two consecutive time slots in the time domain, and the interval between the two SSB resources is 1 symbol.

[0189] The terminal device detects SSB0 on ​​a group of SSB resources and performs channel detection on the first carrier. When it is determined that at least one SSB resource in another group of SSB resources is available, SSB0 is sent through at least one SSB resource in the available SSB resources.

[0190] When performing channel access, the terminal device may use the Type2A channel access method to perform channel detection to determine the availability of the first SSB resource. For the second SSB resource, the terminal device may use at least one of the Type2A channel access method, the Type2B channel access method, and the Type2C channel access method to perform channel detection to determine the availability of the second SSB resource.

[0191] When the terminal device performs SSB transmission, it can determine that the starting position of the first SSB resource is the boundary of the first symbol of the first SSB resource, such as symbol 0, and the starting position of the second SSB resource is the previous symbol of the first symbol of the second SSB resource, such as symbol r, wherein the interval between the starting position in symbol r and the starting position of symbol r is the fourth interval, the length of the fourth interval is a preset value, or the length of the fourth interval is associated with the channel access method.

[0192] For example, the second SSB resource corresponds to the Type2A channel access mode, and the length of the third interval is equal to 25 microseconds;

[0193] For example, the second SSB resource corresponds to the Type2B channel access mode, and the length of the third interval is equal to 16 microseconds;

[0194] For example, the second SSB resource corresponds to the Type2C channel access mode, and the length of the third interval is less than or equal to 16 microseconds.

[0195] Optional, combined Figure 4FFor illustration, the channel access method corresponding to the GP symbol may include at least one of the following situations:

[0196] Case 1: The GP symbol corresponds to the Type 2A channel access mode.

[0197] Exemplarily, assume that there are two terminal devices, UE0 and UE1, and both of them need to perform SSB transmission on the same two SSB resources. Among them, after UE0 successfully performs LBT on the first SSB resource of the two SSB resources, it can use Type2A channel access method to perform LBT after sending SSB on the first SSB resource to determine the availability of the second SSB resource and whether it can be used to send SSB. In other words, for UE0, the channel access method corresponding to the second SSB resource is Type2A. After UE1 fails to perform LBT on the first SSB resource of the two SSB resources, it can also use Type2A channel access method to perform LBT on the channel, and send SSB through the second SSB resource after LBT succeeds.

[0198] Case 2: The GP symbol corresponds to the Type2B channel access mode.

[0199] Exemplarily, assume that there are two terminal devices, UE0 and UE1, and both terminal devices need to perform SSB transmission on the same two SSB resources. Among them, after UE0 successfully performs LBT on the first SSB resource of the two SSB resources, it can use Type2B channel access method to perform LBT after sending SSB on the first SSB resource to determine the availability of the second SSB resource and whether it can be used to send SSB. In other words, for UE0, the channel access method corresponding to the second SSB resource is Type2B. After UE1 fails to perform LBT on the first SSB resource of the two SSB resources, it can also use Type2B channel access method to perform LBT on the channel, and send SSB through the second SSB resource after LBT succeeds.

[0200] Case 3: The GP symbol corresponds to the Type2C channel access mode.

[0201] Exemplarily, assume that there are two terminal devices, UE0 and UE1, and both terminal devices need to perform SSB transmission on the same two SSB resources. Among them, after UE0 succeeds in LBT on the first SSB resource of the two SSB resources, it can directly send SSB through the second SSB resource after an interval of less than or equal to 16 microseconds after the end of sending SSB on the first SSB resource, or in other words, for UE0, the channel access method corresponding to the second SSB resource is Type2C. After UE1 fails in LBT on the first SSB resource of the two SSB resources, if UE1 detects SSB on the first SSB resource, UE1 can also use Type2C channel access method and send SSB through the second SSB resource after an interval of less than or equal to 16 microseconds after the end of the first SSB resource.

[0202] Case 4: UE0 uses Type 2C channel access method in GP symbols, and UE1 uses Type 2B channel access method in GP symbols, wherein UE0 sends SSB on the first SSB resource, and UE1 does not send SSB on the first SSB resource.

[0203] Exemplarily, assume that there are two terminal devices, UE0 and UE1, and both terminal devices need to perform SSB transmission on the same two SSB resources. Among them, after UE0 succeeds in LBT on the first SSB resource of the two SSB resources, it can directly send SSB through the second SSB resource after an interval of 16 microseconds after the end of sending SSB on the first SSB resource, or in other words, for UE0, the channel access mode corresponding to the second SSB resource is Type2C. After UE1 fails in LBT on the first SSB resource of the two SSB resources, it can use Type2B to perform LBT on the channel, and send SSB through the second SSB resource after LBT succeeds.

[0204] Optionally, in any of the above cases 1 to 4, if the terminal device needs to start transmission from the middle of a GP symbol, the terminal device may transmit an extended part of the cyclic prefix CP of the first symbol in the SSB to be sent in the GP symbol to ensure that the GAP in the GP symbol meets the requirements corresponding to the channel access method.

[0205] Optionally, the channel access method corresponding to the GP symbol is preset, or agreed upon by a protocol, or indicated by a network device through indication information, or indicated by a terminal device with control rights through indication information.

[0206] In an embodiment of the present invention, a terminal device performs channel detection on a first carrier on a shared spectrum to determine the availability of at least one first time domain resource on the first carrier, wherein each of the at least one first time domain resource is used to transmit a synchronization signal block. If the terminal device fails to perform LBT before an SSB resource, the terminal device may perform LBT for another SSB resource, and after LBT succeeds, perform SSB transmission through the SSB resource, thereby increasing the transmission opportunity of the SSB.

[0207] like Figure 5A FIG. 1 is a schematic diagram of an embodiment of a terminal device in an embodiment of the present invention. It may include:

[0208] The processing module 501 is used to perform channel detection on the first carrier on the shared spectrum to determine the availability of at least one first time domain resource on the first carrier, wherein each first time domain resource of the at least one first time domain resource is used to transmit a synchronization signal block.

[0209] Optionally, the processing module 501 is specifically used to perform channel detection on the first carrier on the shared spectrum using a first channel access method, wherein the first channel access method includes at least one of a Type 1 channel access method, a Type 2A channel access method, a Type 2B channel access method, and a Type 2C channel access method.

[0210] Optionally, the processing module 501 is specifically configured to: if the first first time domain resource in at least one first time domain resource transmits a synchronization signal block, the terminal device uses at least one of the Type2A channel access method, the Type2B channel access method, and the Type2C channel access method to perform channel detection to determine the availability of at least one of the other first time domain resources in the at least one first time domain resource except the first first time domain resource; or

[0211] Processing module 501 is specifically used to determine the availability of at least one of the other first time domain resources except the first first time domain resource in at least one first time domain resource if the first first time domain resource in at least one first time domain resource does not transmit a synchronization signal block, and the terminal device uses Type 1 channel access method or Type 2A channel access method to perform channel detection.

[0212] Optionally, the first first time domain resource transmits a synchronization signal block, comprising: the terminal device sends a synchronization signal block through the first first time domain resource, or the terminal device detects the synchronization signal block through the first first time domain resource; or,

[0213] The first first time domain resource does not transmit a synchronization signal block, including: the terminal device does not send a synchronization signal block through the first first time domain resource, and the terminal device does not detect the synchronization signal block through the first first time domain resource.

[0214] Optionally, the processing module 501 is specifically configured to perform channel detection on the first carrier using a Type 1 channel access method or a Type 2A channel access method to determine availability of a first first time domain resource among the at least one first time domain resource.

[0215] Optionally, the at least one first time domain resource includes at least two first time domain resources.

[0216] The processing module 501 is specifically used to perform channel detection on the first carrier using at least one of the Type2A channel access method, the Type2B channel access method and the Type2C channel access method to determine the availability of at least one of the other first time domain resources in the at least one first time domain resource except the first first time domain resource.

[0217] Optionally, the information of at least one first time domain resource is preset or configured by the first device, wherein the information of at least one first time domain resource includes at least one of the time domain position, frequency domain position and number of at least one first time domain resource.

[0218] Optionally, the first device includes a network device or a terminal device with control rights.

[0219] Optionally, at least one first time domain resource includes at least two first time domain resources, wherein at least two first time domain resources have the same quasi-co-located QCL relationship, or at least two first time domain resources are used to transmit synchronization signal blocks with the same QCL relationship, or at least two first time domain resources are used to transmit synchronization signal blocks with the same index.

[0220] Optionally, at least one first time domain resource includes at least two first time domain resources, wherein at least two first time domain resources do not have the same QCL relationship, or at least two first time domain resources are used to transmit synchronization signal blocks that do not have the same QCL relationship, or at least two first time domain resources are used to transmit synchronization signal blocks with the same index.

[0221] Optionally, at least one first time domain resource includes at least two first time domain resources, wherein at least two adjacent first time domain resources included in the at least two first time domain resources are continuous in the time domain; or, a first interval in the time domain between two adjacent first time domain resources in the at least two first time domain resources includes N symbols, where N is a positive integer; or, a second interval in the time domain between two adjacent first time domain resources in the at least two first time domain resources includes M time slots, where M is a positive integer.

[0222] Optionally, the value of N is determined based on the subcarrier spacing of the synchronization signal block.

[0223] Optionally, N symbols are used for the terminal device to perform channel access using at least one of Type2A channel access method, Type2B channel access method and Type2C channel access method, or N symbols are used for the terminal device to perform transmit-receive conversion or transmit-receive conversion.

[0224] Optionally, the at least one first time domain resource is a resource included in at least one time slot, and each time slot in the at least one time slot includes a first time domain resource.

[0225] Optionally, the first time domain resource occupies symbols 0 to 12 in a time slot in the time domain; or,

[0226] The first time domain resource occupies symbols 1 to 13 in a time slot in the time domain; or,

[0227] The first time domain resource occupies symbols 1 to 12 in a time slot in the time domain.

[0228] Optionally, if the first time domain resource does not occupy symbol 0 in a time slot in the time domain, then

[0229] Symbol 0 is used to repeat the transmission of symbol 1; or,

[0230] Symbol 0 is used to transmit the extended part of the cyclic prefix CP of symbol 1; or,

[0231] Symbol 0 is used by the terminal device to perform automatic gain control AGC adjustment.

[0232] Optionally, if the first time domain resource does not occupy symbol 13 in a time slot in the time domain, then

[0233] Symbol 13 is used to transmit the extended part of the cyclic prefix CP of symbol 0 in the next time slot; or,

[0234] Symbol 13 is used for the terminal device to perform automatic gain control AGC adjustment; or,

[0235] Symbol 13 is used for the terminal device to perform the sending and receiving conversion or the sending and receiving conversion.

[0236] Optionally, the at least one first time domain resource is a resource included in at least one time slot, and each time slot in the at least one time slot includes P first time domain resources, where P is a positive integer greater than or equal to 2.

[0237] Optionally, two adjacent first time domain resources among the P first time domain resources are continuous in the time domain.

[0238] Optionally, a third interval in the time domain between two adjacent first time domain resources among the P first time domain resources includes Q symbols, where Q is a positive integer.

[0239] Optionally, Q symbols are used for the terminal device to perform channel access using at least one of Type2A channel access method, Type2B channel access method and Type2C channel access method, or N symbols are used for the terminal device to perform transmit-receive conversion or transmit-receive conversion.

[0240] Optionally, Q symbols are used by the terminal device to transmit an extension of the cyclic prefix CP of the first symbol after Q symbols.

[0241] Optional, such as Figure 5B FIG. 5 is a schematic diagram of another embodiment of a terminal device in an embodiment of the present invention. The terminal device further includes a transceiver module 502,

[0242] The transceiver module 502 is used to send a synchronization signal block through at least one available first time domain resource when the terminal device determines that at least one first time domain resource in the at least one first time domain resource is available based on channel detection.

[0243] Optionally, the transceiver module 502 is specifically configured to send a synchronization signal block on each first time domain resource in at least one available first time domain resource; or,

[0244] The transceiver module 502 is specifically configured to send a synchronization signal block on a first time domain resource in at least one available first time domain resource; or,

[0245] The transceiver module 502 is specifically used to send S synchronization signal blocks on the S available first time domain resources when at least one available first time domain resource includes S available first time domain resources, wherein at least two synchronization signal blocks among the S synchronization signal blocks do not have the same QCL relationship, and S is an integer greater than or equal to 2.

[0246] Optionally, the synchronization signal block includes at least one of a primary synchronization signal, a secondary synchronization signal and a physical broadcast channel.

[0247] like Figure 6As shown, it is a schematic diagram of another embodiment of a terminal device in an embodiment of the present invention. The terminal device is described by taking a mobile phone as an example, and may include: a radio frequency (RF) circuit 610, a memory 620, an input unit 630, a display unit 640, a sensor 650, an audio circuit 660, a wireless fidelity (WiFi) module 670, a processor 680, and a power supply 690. Among them, the RF circuit 610 includes a receiver 614 and a transmitter 612. Those skilled in the art can understand that Figure 6 The mobile phone structure shown in the figure does not constitute a limitation on the mobile phone, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0248] Combine the following Figure 6 A detailed introduction to the various components of the mobile phone:

[0249] The RF circuit 610 can be used for receiving and sending signals during information transmission or calls. In particular, after receiving the downlink information of the base station, it is sent to the processor 680 for processing; in addition, the designed uplink data is sent to the base station. Generally, the RF circuit 610 includes but is not limited to an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier (LNA), a duplexer, etc. In addition, the RF circuit 610 can also communicate with the network and other devices through wireless communication. The above wireless communication can use any communication standard or protocol, including but not limited to the global system of mobile communication (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code division multiple access (WCDMA), long term evolution (LTE), email, short messaging service (SMS), etc.

[0250] The memory 620 can be used to store software programs and modules. The processor 680 executes various functional applications and data processing of the mobile phone by running the software programs and modules stored in the memory 620. The memory 620 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory 620 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0251] The input unit 630 can be used to receive input digital or character information, and to generate key signal input related to the user settings and function control of the mobile phone. Specifically, the input unit 630 may include a touch panel 631 and other input devices 632. The touch panel 631, also known as a touch screen, can collect the user's touch operation on or near it (such as the user's operation on the touch panel 631 or near the touch panel 631 using any suitable object or accessory such as a finger, stylus, etc.), and drive the corresponding connection device according to a pre-set program. Optionally, the touch panel 631 may include two parts: a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it to the processor 680, and can receive and execute commands sent by the processor 680. In addition, the touch panel 631 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves. In addition to the touch panel 631, the input unit 630 may also include other input devices 632. Specifically, the other input devices 632 may include but are not limited to one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, etc.

[0252] The display unit 640 can be used to display information input by the user or information provided to the user and various menus of the mobile phone. The display unit 640 may include a display panel 641. Optionally, the display panel 641 may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc. Further, the touch panel 631 may cover the display panel 641. When the touch panel 631 detects a touch operation on or near it, it is transmitted to the processor 680 to determine the type of touch event. Subsequently, the processor 680 provides a corresponding visual output on the display panel 641 according to the type of touch event. Although in Figure 6 In the embodiment, the touch panel 631 and the display panel 641 are used as two independent components to realize the input and output functions of the mobile phone, but in some embodiments, the touch panel 631 and the display panel 641 can be integrated to realize the input and output functions of the mobile phone.

[0253] The mobile phone may also include at least one sensor 650, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel 641 according to the brightness of the ambient light, and the proximity sensor may turn off the display panel 641 and / or the backlight when the mobile phone is moved to the ear. As a type of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that identify the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors that can be configured in the mobile phone, such as gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., they will not be repeated here.

[0254] The audio circuit 660, the speaker 661, and the microphone 662 can provide an audio interface between the user and the mobile phone. The audio circuit 660 can transmit the received audio data to the speaker 661 after converting the received audio data into an electrical signal, which is converted into a sound signal for output; on the other hand, the microphone 662 converts the collected sound signal into an electrical signal, which is received by the audio circuit 660 and converted into audio data, and then the audio data is output to the processor 680 for processing, and then sent to another mobile phone through the RF circuit 610, or the audio data is output to the memory 620 for further processing.

[0255] WiFi is a short-range wireless transmission technology. The mobile phone can help users send and receive emails, browse web pages and access streaming media through the WiFi module 670. It provides users with wireless broadband Internet access. Figure 6A WiFi module 670 is shown, but it is understandable that it is not an essential component of the mobile phone and can be omitted as needed without changing the essence of the invention.

[0256] The processor 680 is the control center of the mobile phone. It uses various interfaces and lines to connect various parts of the entire mobile phone. By running or executing software programs and / or modules stored in the memory 620, and calling data stored in the memory 620, it executes various functions of the mobile phone and processes data, thereby monitoring the mobile phone as a whole. Optionally, the processor 680 may include one or more processing units; preferably, the processor 680 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 680.

[0257] The mobile phone also includes a power supply 690 (such as a battery) for supplying power to various components. Preferably, the power supply can be logically connected to the processor 680 through a power management system, so that the power management system can manage charging, discharging, power consumption management, etc. Although not shown, the mobile phone can also include a camera, a Bluetooth module, etc., which will not be described in detail here.

[0258] It should be noted that, in an embodiment of the present invention, the processor 680 is used to perform channel detection on the first carrier on the shared spectrum to determine the availability of at least one first time domain resource on the first carrier, wherein each first time domain resource of the at least one first time domain resource is used to transmit a synchronization signal block.

[0259] Optionally, the processor 680 is specifically used to perform channel detection on a first carrier on a shared spectrum using a first channel access method, wherein the first channel access method includes at least one of a Type 1 channel access method, a Type 2A channel access method, a Type 2B channel access method, and a Type 2C channel access method.

[0260] Optionally, the processor 680 is specifically configured to: if the first first time domain resource in at least one first time domain resource transmits a synchronization signal block, the terminal device uses at least one of the Type2A channel access method, the Type2B channel access method, and the Type2C channel access method to perform channel detection to determine the availability of at least one of the other first time domain resources in the at least one first time domain resource except the first first time domain resource; or

[0261] Processor 680 is specifically used to determine the availability of at least one of the other first time domain resources except the first first time domain resource in the at least one first time domain resource if the first first time domain resource in the at least one first time domain resource does not transmit a synchronization signal block, and the terminal device uses Type 1 channel access method or Type 2A channel access method to perform channel detection.

[0262] Optionally, the first first time domain resource transmits a synchronization signal block, comprising: the terminal device sends a synchronization signal block through the first first time domain resource, or the terminal device detects the synchronization signal block through the first first time domain resource; or,

[0263] The first first time domain resource does not transmit a synchronization signal block, including: the terminal device does not send a synchronization signal block through the first first time domain resource, and the terminal device does not detect the synchronization signal block through the first first time domain resource.

[0264] Optionally, the processor 680 is specifically configured to perform channel detection on the first carrier using a Type 1 channel access method or a Type 2A channel access method to determine availability of a first first time domain resource among the at least one first time domain resource.

[0265] Optionally, the at least one first time domain resource includes at least two first time domain resources.

[0266] Processor 680 is specifically used to perform channel detection on the first carrier using at least one of Type2A channel access method, Type2B channel access method and Type2C channel access method to determine the availability of at least one of the other first time domain resources in at least one first time domain resource except the first first time domain resource.

[0267] Optionally, the information of at least one first time domain resource is preset or configured by the first device, wherein the information of at least one first time domain resource includes at least one of the time domain position, frequency domain position and number of at least one first time domain resource.

[0268] Optionally, the first device includes a network device or a terminal device with control rights.

[0269] Optionally, at least one first time domain resource includes at least two first time domain resources, wherein at least two first time domain resources have the same quasi-co-located QCL relationship, or at least two first time domain resources are used to transmit synchronization signal blocks with the same QCL relationship, or at least two first time domain resources are used to transmit synchronization signal blocks with the same index.

[0270] Optionally, at least one first time domain resource includes at least two first time domain resources, wherein at least two first time domain resources do not have the same QCL relationship, or at least two first time domain resources are used to transmit synchronization signal blocks that do not have the same QCL relationship, or at least two first time domain resources are used to transmit synchronization signal blocks with the same index.

[0271] Optionally, at least one first time domain resource includes at least two first time domain resources, wherein at least two adjacent first time domain resources included in the at least two first time domain resources are continuous in the time domain; or, a first interval in the time domain between two adjacent first time domain resources in the at least two first time domain resources includes N symbols, where N is a positive integer; or, a second interval in the time domain between two adjacent first time domain resources in the at least two first time domain resources includes M time slots, where M is a positive integer.

[0272] Optionally, the value of N is determined based on the subcarrier spacing of the synchronization signal block.

[0273] Optionally, N symbols are used for the terminal device to perform channel access using at least one of Type2A channel access method, Type2B channel access method and Type2C channel access method, or N symbols are used for the terminal device to perform transmit-receive conversion or transmit-receive conversion.

[0274] Optionally, the at least one first time domain resource is a resource included in at least one time slot, and each time slot in the at least one time slot includes a first time domain resource.

[0275] Optionally, the first time domain resource occupies symbols 0 to 12 in a time slot in the time domain; or,

[0276] The first time domain resource occupies symbols 1 to 13 in a time slot in the time domain; or,

[0277] The first time domain resource occupies symbols 1 to 12 in a time slot in the time domain.

[0278] Optionally, if the first time domain resource does not occupy symbol 0 in a time slot in the time domain, then

[0279] Symbol 0 is used to repeat the transmission of symbol 1; or,

[0280] Symbol 0 is used to transmit the extended part of the cyclic prefix CP of symbol 1; or,

[0281] Symbol 0 is used by the terminal device to perform automatic gain control AGC adjustment.

[0282] Optionally, if the first time domain resource does not occupy symbol 13 in a time slot in the time domain, then

[0283] Symbol 13 is used to transmit the extended part of the cyclic prefix CP of symbol 0 in the next time slot; or,

[0284] Symbol 13 is used for the terminal device to perform automatic gain control AGC adjustment; or,

[0285] Symbol 13 is used for the terminal device to perform the sending and receiving conversion or the sending and receiving conversion.

[0286] Optionally, the at least one first time domain resource is a resource included in at least one time slot, and each time slot in the at least one time slot includes P first time domain resources, where P is a positive integer greater than or equal to 2.

[0287] Optionally, two adjacent first time domain resources among the P first time domain resources are continuous in the time domain.

[0288] Optionally, a third interval in the time domain between two adjacent first time domain resources among the P first time domain resources includes Q symbols, where Q is a positive integer.

[0289] Optionally, Q symbols are used for the terminal device to perform channel access using at least one of Type2A channel access method, Type2B channel access method and Type2C channel access method, or N symbols are used for the terminal device to perform transmit-receive conversion or transmit-receive conversion.

[0290] Optionally, Q symbols are used by the terminal device to transmit an extension of the cyclic prefix CP of the first symbol after Q symbols.

[0291] Optionally, the RF circuit 610 is used to send a synchronization signal block through at least one available first time domain resource when the terminal device determines, based on channel detection, that at least one first time domain resource in the at least one first time domain resource is available.

[0292] Optionally, the RF circuit 610 is specifically configured to send a synchronization signal block on each first time domain resource in at least one available first time domain resource; or,

[0293] The RF circuit 610 is specifically configured to send a synchronization signal block on a first time domain resource of at least one available first time domain resource; or,

[0294] The RF circuit 610 is specifically used to send S synchronization signal blocks on the S available first time domain resources when at least one available first time domain resource includes S available first time domain resources, wherein at least two synchronization signal blocks among the S synchronization signal blocks do not have the same QCL relationship, and S is an integer greater than or equal to 2.

[0295] Optionally, the synchronization signal block includes at least one of a primary synchronization signal, a secondary synchronization signal and a physical broadcast channel.

[0296] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present invention is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a server or data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state hard disk Solid State Disk (SSD)), etc.

[0297] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

Claims

1. A method for transmitting a synchronization signal block SSB, characterized in that: include: The terminal device performs channel detection on a first carrier on a shared spectrum to determine the availability of at least one first time domain resource on the first carrier, wherein each first time domain resource of the at least one first time domain resource is used to transmit a synchronization signal block.

2. The method according to claim 1, characterized in that The terminal device performs channel detection on a first carrier on a shared spectrum, including: The terminal device uses a first channel access method to perform channel detection on a first carrier on the shared spectrum, wherein the first channel access method includes at least one of a Type 1 channel access method, a Type 2A channel access method, a Type 2B channel access method, and a Type 2C channel access method.

3. The method according to claim 2, characterized in that The at least one first time domain resource includes at least two first time domain resources, and the terminal device performs channel detection on a first carrier on a shared spectrum to determine availability of at least one first time domain resource on the first carrier, including: If the first first time domain resource in the at least one first time domain resource transmits a synchronization signal block, the terminal device uses at least one of the Type2A channel access method, the Type2B channel access method and the Type2C channel access method to perform channel detection to determine the availability of at least one of the other first time domain resources in the at least one first time domain resource except the first first time domain resource; or, If the first one of the at least one first time domain resource does not transmit a synchronization signal block, the terminal device uses the Type 1 channel access method or the Type 2A channel access method to perform channel detection to determine the availability of at least one of the other first time domain resources in the at least one first time domain resource except the first one.

4. The method according to claim 3, characterized in that The first first time domain resource transmits a synchronization signal block, comprising: the terminal device sends a synchronization signal block through the first first time domain resource, or the terminal device detects a synchronization signal block through the first first time domain resource; or, The first first time domain resource does not transmit a synchronization signal block, including: the terminal device sends a synchronization signal block through the first first time domain resource, and the terminal device detects the synchronization signal block through the first first time domain resource.

5. The method according to claim 2, characterized in that: The terminal device performs channel detection on a first carrier on a shared spectrum to determine availability of at least one first time domain resource on the first carrier, including: The terminal device performs channel detection on the first carrier using the Type 1 channel access method or the Type 2A channel access method to determine the availability of the first first time domain resource among the at least one first time domain resource.

6. The method according to any one of claims 1 to 5, characterized in that The information of the at least one first time domain resource is preset or configured by the first device, wherein the information of the at least one first time domain resource includes at least one of the time domain position, frequency domain position and number of the at least one first time domain resource.

7. The method according to claim 6, characterized in that The first device includes a network device or a terminal device with control rights.

8. The method according to any one of claims 1 to 7, characterized in that The at least one first time domain resource includes at least two first time domain resources, wherein the at least two first time domain resources have the same quasi-co-located QCL relationship, or the at least two first time domain resources are used to transmit synchronization signal blocks with the same QCL relationship, or the at least two first time domain resources are used to transmit synchronization signal blocks with the same index.

9. The method according to any one of claims 1 to 8, characterized in that The at least one first time domain resource includes at least two first time domain resources, wherein: At least two adjacent first time domain resources included in the at least two first time domain resources are continuous in the time domain; or, A first interval in the time domain between two adjacent first time domain resources of the at least two first time domain resources includes N symbols, where N is a positive integer; or, A second interval in the time domain between two adjacent first time domain resources of the at least two first time domain resources includes M time slots, where M is a positive integer.

10. A terminal device, characterized in that: include: A processing module is used to perform channel detection on a first carrier on a shared spectrum to determine the availability of at least one first time domain resource on the first carrier, wherein each first time domain resource of the at least one first time domain resource is used to transmit a synchronization signal block.

11. The terminal device according to claim 10, characterized in that: The processing module is specifically used to perform channel detection on the first carrier on the shared spectrum using a first channel access method, wherein the first channel access method includes at least one of a Type 1 channel access method, a Type 2A channel access method, a Type 2B channel access method, and a Type 2C channel access method.

12. The terminal device according to claim 11, characterized in that: The processing module is specifically used for, if the first first time domain resource in the at least one first time domain resource transmits a synchronization signal block, the terminal device uses at least one of the Type2A channel access method, the Type2B channel access method and the Type2C channel access method to perform channel detection to determine the availability of at least one of the other first time domain resources in the at least one first time domain resource except the first first time domain resource; or, The processing module is specifically used to determine the availability of at least one of the other first time domain resources except the first first time domain resource in the at least one first time domain resource if the first first time domain resource in the at least one first time domain resource does not transmit a synchronization signal block, then the terminal device uses the Type 1 channel access method or the Type 2A channel access method to perform channel detection.

13. The terminal device according to claim 12, characterized in that: The first first time domain resource transmits a synchronization signal block, comprising: the terminal device sends a synchronization signal block through the first first time domain resource, or the terminal device detects a synchronization signal block through the first first time domain resource; or, The first first time domain resource does not transmit a synchronization signal block, including: the terminal device does not send a synchronization signal block through the first first time domain resource, and the terminal device does not detect a synchronization signal block through the first first time domain resource.

14. The terminal device according to claim 11, characterized in that: The processing module is specifically configured to perform channel detection on the first carrier using the Type 1 channel access method or the Type 2A channel access method to determine availability of a first first time domain resource among the at least one first time domain resource.

15. The terminal device according to any one of claims 10 to 14, characterized in that: The information of the at least one first time domain resource is preset or configured by the first device, wherein the information of the at least one first time domain resource includes at least one of the time domain position, frequency domain position and number of the at least one first time domain resource.

16. The terminal device according to claim 15, characterized in that: The first device includes a network device or a terminal device with control rights.

17. The terminal device according to any one of claims 10 to 16, characterized in that: The at least one first time domain resource includes at least two first time domain resources, wherein the at least two first time domain resources have the same quasi-co-located QCL relationship, or the at least two first time domain resources are used to transmit synchronization signal blocks with the same QCL relationship, or the at least two first time domain resources are used to transmit synchronization signal blocks with the same index.

18. The terminal device according to any one of claims 10 to 17, characterized in that: The at least one first time domain resource includes at least two first time domain resources, wherein: At least two adjacent first time domain resources included in the at least two first time domain resources are continuous in the time domain; or, A first interval in the time domain between two adjacent first time domain resources of the at least two first time domain resources includes N symbols, where N is a positive integer; or, A second interval in the time domain between two adjacent first time domain resources of the at least two first time domain resources includes M time slots, where M is a positive integer.

19. A terminal device, characterized in that: include: A memory storing executable program code; a processor coupled to the memory; The processor calls the executable program code stored in the memory to perform channel detection on a first carrier on a shared spectrum to determine the availability of at least one first time domain resource on the first carrier, wherein each first time domain resource of the at least one first time domain resource is used to transmit a synchronization signal block.

20. The terminal device according to claim 19, characterized in that: The processor is specifically used to perform channel detection on the first carrier on the shared spectrum using a first channel access method, wherein the first channel access method includes at least one of a Type 1 channel access method, a Type 2A channel access method, a Type 2B channel access method, and a Type 2C channel access method.

21. The terminal device according to claim 20, characterized in that: The processor is specifically configured to, if a first first time domain resource in the at least one first time domain resource transmits a synchronization signal block, the terminal device uses at least one of the Type2A channel access method, the Type2B channel access method, and the Type2C channel access method to perform channel detection to determine the availability of at least one of the other first time domain resources in the at least one first time domain resource except the first first time domain resource; or, The processor is specifically used to, if the first first time domain resource among the at least one first time domain resource does not transmit a synchronization signal block, then the terminal device uses the Type 1 channel access method or the Type 2A channel access method to perform channel detection to determine the availability of at least one of the other first time domain resources among the at least one first time domain resource except the first first time domain resource.

22. The terminal device according to claim 21, characterized in that: The first first time domain resource transmits a synchronization signal block, comprising: the terminal device sends a synchronization signal block through the first first time domain resource, or the terminal device detects a synchronization signal block through the first first time domain resource; or, The first first time domain resource does not transmit a synchronization signal block, including: the terminal device does not send a synchronization signal block through the first first time domain resource, and the terminal device does not detect a synchronization signal block through the first first time domain resource.

23. The terminal device according to claim 20, characterized in that: The processor is specifically configured to perform channel detection on the first carrier using the Type 1 channel access method or the Type 2A channel access method to determine availability of a first first time domain resource among the at least one first time domain resource.

24. The terminal device according to any one of claims 19 to 23, characterized in that: The information of the at least one first time domain resource is preset or configured by the first device, wherein the information of the at least one first time domain resource includes at least one of the time domain position, frequency domain position and number of the at least one first time domain resource.

25. The terminal device according to claim 24, characterized in that: The first device includes a network device or a terminal device with control rights.

26. The terminal device according to any one of claims 19 to 25, characterized in that: The at least one first time domain resource includes at least two first time domain resources, wherein the at least two first time domain resources have the same quasi-co-located QCL relationship, or the at least two first time domain resources are used to transmit synchronization signal blocks with the same QCL relationship, or the at least two first time domain resources are used to transmit synchronization signal blocks with the same index.

27. The terminal device according to any one of claims 19 to 26, characterized in that: The at least one first time domain resource includes at least two first time domain resources, wherein: At least two adjacent first time domain resources included in the at least two first time domain resources are continuous in the time domain; or, A first interval in the time domain between two adjacent first time domain resources of the at least two first time domain resources includes N symbols, where N is a positive integer; or, A second interval in the time domain between two adjacent first time domain resources of the at least two first time domain resources includes M time slots, where M is a positive integer.

28. A computer-readable storage medium comprising instructions, which, when executed on a computer, causes the computer to perform the method according to any one of claims 1 to 9.

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