Synchronization signal transmission method and device, storage medium and program product

Abstract

The embodiment of the invention provides a synchronization signal transmission method and device, a storage medium and a program product, relates to the technical field of communication, and is used for providing large bandwidth support for a future mobile communication system. The method comprises the following steps: determining a time domain position of a candidate SSB based on an SSB pattern; wherein the SCS candidate set of the candidate SSB comprises 60KHz, and the number of OFDM symbols included in the candidate SSB is greater than or equal to 4; the SSB is received based on the time domain location of the candidate SSB.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular, to a synchronization signal transmission method, apparatus, storage medium, and program product. Background Art

[0002] Future mobile communication systems (such as 6th generation mobile networks (6G) communication systems) are gradually becoming the focus of deployment. The vision, requirements, technical indicators, research directions, etc. of future mobile communication systems are also becoming clearer. How to provide large bandwidth support for future mobile communication systems has become an urgent problem to be solved. Summary of the Invention

[0003] Embodiments of the present disclosure provide a synchronization signal transmission method, apparatus, storage medium, and program product for providing large bandwidth support for future mobile communication systems.

[0004] To achieve the above objectives, the present disclosure adopts the following technical solutions:

[0005] In a first aspect, a synchronization signal transmission method is provided, which is applied to a first node. The method includes:

[0006] Determine the time domain position of a candidate synchronization signal block (SSB) based on an SSB pattern; wherein, the candidate set of subcarrier spacings (SCSs) of the candidate SSB includes 60 KHz, and the number of orthogonal frequency division multiplexing (OFDM) symbols included in the candidate SSB is greater than or equal to 4;

[0007] Receive the SSB based on the time domain position of the candidate SSB.

[0008] In a second aspect, a synchronization signal transmission method is provided, which is applied to a second node. The method includes:

[0009] Determine the time domain position of a candidate SSB based on an SSB pattern; wherein, the candidate set of SCSs of the candidate SSB includes 60 KHz, and the number of OFDM symbols included in the candidate SSB is greater than or equal to 4;

[0010] Transmit the SSB based on the time domain position of the candidate SSB.

[0011] In a third aspect, a communication apparatus is provided, which is applied to a first node and includes:

[0012] A processing unit, configured to determine the time domain position of a candidate SSB based on an SSB pattern; wherein, the candidate set of SCSs of the candidate SSB includes 60 KHz, and the number of OFDM symbols included in the candidate SSB is greater than or equal to 4;

[0013] A receiving unit, configured to receive an SSB based on the time domain position of the candidate SSB.

[0014] In a fourth aspect, a communication device is provided, which is applied to a second node and includes:

[0015] A processing unit, configured to determine the time domain position of a candidate SSB based on an SSB pattern; wherein, the candidate set of SCSs of the candidate SSB includes 60 KHz, and the number of OFDM symbols included in the candidate SSB is greater than or equal to 4;

[0016] A transmitting unit, configured to transmit an SSB based on the time domain position of the candidate SSB.

[0017] In a fifth aspect, a communication device is provided, including: a processor and a memory; the memory stores instructions executable by the processor; when the processor is configured to execute the instructions, the communication device implements any method provided in the first aspect or the second aspect as described above.

[0018] In a sixth aspect, a computer-readable storage medium is provided, and the computer-readable storage medium stores computer instructions, and when the computer instructions are run on a computer, the computer executes any method provided in the first aspect or the second aspect.

[0019] In a seventh aspect, a computer program product including computer instructions is provided, and when the computer instructions are run on a computer, the computer executes any method provided in the first aspect or the second aspect.

[0020] In the embodiments of the present disclosure, compared with the related art where SSB supports 15 KHz, 30 KHz, 120 KHz, and 240 KHz, 60 KHz is not defined, and in the related art, the number of OFDM symbols included in SSB is 4, the present disclosure provides an SSB pattern that supports a candidate SBB with an SCS of 60 KHz and more than 4 symbols, so as to provide large bandwidth support for future mobile communication systems and improve the accuracy of receiving SSBs. Description of the Drawings

[0021] The drawings are used to provide a further understanding of the technical solutions of the present disclosure, and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solutions of the present disclosure, and do not constitute a limitation to the technical solutions of the present disclosure.

[0022] Figure 1 It is a schematic structural diagram of an independent SSB provided by an embodiment of the present disclosure;

[0023] Figure 2 Schematic diagram of an SSB period and SSB beam polling provided by an embodiment of the present disclosure;

[0024] Figure 3 Schematic diagram of the structure of a communication system provided by an embodiment of the present disclosure;

[0025] Figure 4 Schematic flowchart of a synchronization signal transmission method provided by an embodiment of the present disclosure;

[0026] Figure 5 Schematic diagram of the control channel time resource for reserving 15KHz and 30KHz symbols provided by an embodiment of the present disclosure;

[0027] Figure 6 Schematic diagram of the control channel time resource for reserving 30KHz and 60KHz symbols provided by an embodiment of the present disclosure;

[0028] Figure 7 Schematic diagram of the control channel time resource for reserving 60KHz and 120KHz symbols provided by an embodiment of the present disclosure;

[0029] Figure 8 Schematic diagram of the SSB pattern of 15KHz candidate SSB and 5 OFDM symbols provided by an embodiment of the present disclosure;

[0030] Figure 9 Another schematic diagram of the SSB pattern of 15KHz candidate SSB and 5 OFDM symbols provided by an embodiment of the present disclosure;

[0031] Figure 10 Schematic diagram of the SSB pattern of 30KHz candidate SSB and 5 OFDM symbols provided by an embodiment of the present disclosure;

[0032] Figure 11 Schematic diagram of the SSB pattern of 60KHz candidate SSB and 5 OFDM symbols provided by an embodiment of the present disclosure;

[0033] Figure 12 Another schematic diagram of the SSB pattern of 60KHz candidate SSB and 5 OFDM symbols provided by an embodiment of the present disclosure;

[0034] Figure 13 Schematic diagram of the SSB pattern of 120KHz candidate SSB and 5 OFDM symbols provided by an embodiment of the present disclosure;

[0035] Figure 14 Another schematic diagram of the SSB pattern of 120KHz candidate SSB and 5 OFDM symbols provided by an embodiment of the present disclosure;

[0036] Figure 15 Schematic diagram of a 240KHz candidate SSB and an SSB pattern of 5 OFDM symbols provided by an embodiment of the present disclosure;

[0037] Figure 16 Schematic diagram of another 240KHz candidate SSB and an SSB pattern of 5 OFDM symbols provided by an embodiment of the present disclosure;

[0038] Figure 17 Schematic diagram of a 15KHz candidate SSB and an SSB pattern of 6 OFDM symbols provided by an embodiment of the present disclosure;

[0039] Figure 18 Schematic diagram of a 30KHz candidate SSB and an SSB pattern of 6 OFDM symbols provided by an embodiment of the present disclosure;

[0040] Figure 19 Schematic diagram of another 30KHz candidate SSB and an SSB pattern of 6 OFDM symbols provided by an embodiment of the present disclosure;

[0041] Figure 20 Schematic diagram of a 60KHz candidate SSB and an SSB pattern of 6 OFDM symbols provided by an embodiment of the present disclosure;

[0042] Figure 21 Schematic diagram of another 60KHz candidate SSB and an SSB pattern of 6 OFDM symbols provided by an embodiment of the present disclosure;

[0043] Figure 22 Schematic diagram of a 120KHz candidate SSB and an SSB pattern of 6 OFDM symbols provided by an embodiment of the present disclosure;

[0044] Figure 23 Schematic diagram of another 120KHz candidate SSB and an SSB pattern of 6 OFDM symbols provided by an embodiment of the present disclosure;

[0045] Figure 24 Schematic diagram of a 240KHz candidate SSB and an SSB pattern of 6 OFDM symbols provided by an embodiment of the present disclosure;

[0046] Figure 25 Schematic diagram of another 240KHz candidate SSB and an SSB pattern of 6 OFDM symbols provided by an embodiment of the present disclosure;

[0047] Figure 26 Schematic diagram of a 15KHz candidate SSB and an SSB pattern of 7 OFDM symbols provided by an embodiment of the present disclosure;

[0048] Figure 27Schematic diagram of a 15KHz candidate SSB and an SSB pattern of x OFDM symbols provided by an embodiment of the present disclosure;

[0049] Figure 28 Schematic diagram of an SSB pattern in which 30KHz candidate SSBs are connected end to end across time slots provided by an embodiment of the present disclosure;

[0050] Figure 29 Schematic diagram of an SSB pattern in which 30KHz candidate SSBs are connected end to end across time slots and the symbols are discontinuously distributed provided by an embodiment of the present disclosure;

[0051] Figure 30 Schematic diagram of an SSB pattern of 15KHz provided by an embodiment of the present disclosure, with extended support for Lmax = 16;

[0052] Figure 31 Schematic diagram of another SSB pattern of 15KHz provided by an embodiment of the present disclosure, with extended support for Lmax = 16;

[0053] Figure 32 Schematic diagram of the process of another synchronization signal transmission method provided by an embodiment of the present disclosure;

[0054] Figure 33 Schematic diagram of the composition of a communication device provided by an embodiment of the present disclosure;

[0055] Figure 34 Schematic diagram of the composition of another communication device provided by an embodiment of the present disclosure;

[0056] Figure 35 Schematic diagram of the structure of a communication device provided by an embodiment of the present disclosure. Detailed implementation manners

[0057] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

[0058] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and its other forms such as the third-person singular form "comprises" and the present participle form "comprising" are interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example", or "some examples", etc. are intended to indicate that the specific features, structures, materials, or characteristics related to the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials, or characteristics may be included in any one or more embodiments or examples in any suitable manner.

[0059] The terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present disclosure, unless otherwise specified, the meaning of "a plurality" is two or more.

[0060] In the embodiments of the present disclosure, words such as "exemplary" or "for example" are used to mean for example, illustration, or explanation. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present disclosure should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0061] In addition, the use of "based on" means open and inclusive because a process, step, calculation, or other action "based on" one or more of the stated conditions or values may in practice be based on additional conditions or values beyond those stated.

[0062] The fifth-generation mobile communication technology (5th generation mobile networks, 5G) has determined the use of FR1 and FR2 as the main radio frequency bands. Regarding the frequency bands that can be used for 6G, in addition to reusing the frequency bands used in 5G, some other supplementary new frequency bands are under discussion. Among them, the U6G frequency band is to a certain extent determined to be a frequency band that can be adopted for 6G. U6G refers to the upper half of the 6 GHz spectrum (6425 - 7125 MHz), which belongs to the mid-frequency spectrum, taking into account both the advantages of low-frequency coverage and high-frequency capacity, and providing large bandwidth support for 6G.

[0063] Different frequency bands need to be adapted to different subcarrier spacings to match the wireless propagation environment of this frequency band. Compared with 5G, new subcarrier spacing parameters will be introduced, which will further affect all channels and signals. Among them, the scheme for synchronizing signal transmission will also be affected by the new subcarrier spacing.

[0064] A synchronization search signal and SSB structure design scheme based on OFDM is used in the 5G communication system. The SSB structure includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). Therefore, SSB can also be called a synchronization signal and physical broadcast channel block (SS / PBCH block). SSB is composed of several consecutive OFDM symbols, and some of the symbols respectively carry PSS, SSS, and PBCH. As Figure 1 shown, it is a schematic diagram of the structure of an independent SSB. SSB is composed of 4 consecutive OFDM symbols, and in the frequency domain, it occupies a maximum of 20 resource blocks (RBs) and a minimum of 12 RBs. Each RB in the frequency domain is composed of 12 resource elements (REs). Among them, PSS is mainly used for time synchronization and the timing of OFDM symbols, SSS is used for frame synchronization and cell ID identification, and PBCH carries important system broadcast information. Figure 1 The DMRS in [[ ]] is the demodulation reference signal (DMRS).

[0065] A user equipment (UE) receives a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) to perform cell search. Cell search is a process in which the UE acquires time and frequency synchronization with the cell and detects the physical layer cell ID of the cell. After the UE acquires time and frequency synchronization and the cell ID, it further demodulates and reads the master information block (MIB) information in the PBCH. The MIB information contains important system messages, such as the system frame number, the common subcarrier spacing parameter, the physical downlink control channel (PDCCH) configuration information pointing to SIB1, the DMRS position indication, the SSB subcarrier offset, and the half-frame indication, etc., for all UEs accessing the cell.

[0066] Future mobile communication systems (such as 6G networks) consider having sufficient backward compatibility with 5G networks. A similar structure with consecutive OFDM symbols carrying PSS, SSS, and PBCH will be redesigned considering the requirements of backward compatibility, focusing on more OFDM symbols to carry longer synchronization signals and more system messages, or being broadened in the frequency domain to achieve the same purpose.

[0067] Signals and channels in the access phase of 6G networks need to introduce multi-beam or spatial filtering transmission and reception technologies. Multiple SSBs will be transmitted after being processed with different beams or spatial filtering, and each SSB corresponds to one beam or spatial filtering. During the periodic transmission of multiple SSBs, within each period, multiple SSBs will poll all possible beams or spatial filtering at least once. Multiple SSBs will be numbered and transmitted in ascending order of time. The maximum number of definable SSBs is Lmax, numbered from 0 to Lmax - 1. Lmax can also be understood as the maximum number of candidate SSBs supported (including) by the SSB pattern. The period of repetition of multiple SSBs can be predefined for initial access, typically 20 ms; or it can be configured through system messages, typically configurable from 5 ms to 160 ms or even longer. In addition to mapping the numbers of multiple SSBs to the time domain in ascending order of time, when SSBs can be transmitted by frequency division simultaneously, the numbers of SSBs can also be mapped to the frequency domain in ascending order of frequency, which does not conflict with the time domain mapping and can be used in combination. The priority of time domain mapping and frequency domain mapping can be flexibly handled, such as performing frequency domain mapping first, or time domain mapping first. As Figure 2 shown, it is a schematic diagram of SSB period and SSB beam polling provided by an embodiment of the present disclosure. Multiple SSBs polling all beams are concentrated within a half-frame of an SSB period.

[0068] The position of the SSB in the time domain must be predefined to reduce the complexity of the UE's blind detection of the SSB's time domain position and reduce the latency of cell search.

[0069] When using an SSB structure with 4 consecutive OFDM symbols, since U6G is an intermediate frequency spectrum and is more suitable for using 60KHz as the subcarrier spacing parameter of the OFDM symbols in the SSB, the time domain positions of multiple SSBs within a single period suitable for 60KHz can be designed specifically, or it can also be called the SSB pattern.

[0070] When using an SSB structure with more than 4 consecutive OFDM symbols, it is also necessary to design the time domain positions of multiple SSBs within a single period suitable for subcarrier spacings of 15KHz, 30KHz, 60KHz, 120KHz, and 240KHz for possible configurations between 5 symbols and 14 symbols, or it can also be called the SSB pattern.

[0071] Due to the introduction of more beams or spatial filtering and the use of more OFDM symbols, the time domain distribution of multiple SSBs within a period may exceed half a frame. Therefore, when considering the time domain positions of SSBs within a single period, not only the situation where they are concentrated within half a frame needs to be considered, but also the situations where they are concentrated within a single frame or two frames need to be considered.

[0072] The technical solutions provided by the embodiments of the present disclosure can be applied to various mobile communication systems. For example, the NR mobile communication system using 5G, future mobile communication systems (such as 6G communication systems), or various communication convergence systems, etc. The embodiments of the present disclosure do not limit this.

[0073] In the embodiments of the present disclosure, the mobile communication system (including but not limited to the third-generation 3G, fourth-generation 4G, fifth-generation 5G, and future mobile communication systems, such as 6G) may include network-side devices (such as including but not limited to base stations) and receiving-side devices (such as including but not limited to terminals). And it should be understood that in this example, for example, in the downlink, the first communication node (which can also be called the first communication node device, the first node) may be a base station-side device, and the second communication node (which can also be called the second communication node device, the second node) may be a terminal-side device. In some examples, for example, in the uplink, the first communication node may also be a terminal-side device, and the second communication node may also be a base station-side device. In some examples, for example, in device-to-device communication between two communication nodes, both the first communication node and the second communication node may be base stations or terminals. Therefore, whether the first node and the second node are base stations or terminals needs to be determined according to the context.

[0074] Figure 3 The following shows a schematic structural diagram of a communication system provided by the embodiments of the present disclosure. As Figure 3As shown, the communication system includes, but is not limited to, a first node 110 and a second node 120. Among them, wireless signals can be transmitted, received, and related interactions can occur between the first node 110 and the second node 120.

[0075] In a wireless communication scenario, the first node 110 communicates with the second node 120 via a wireless channel. For example, the first node 110 is a terminal and the second node 120 is a base station, and communication occurs between the terminal and the base station via a wireless channel. Another example is that the first node 110 is a terminal and the second node 120 is a wireless router, and communication occurs between the wireless router and the terminal via a wireless channel. Another example is that the first node 110 is a first base station and the second node 120 is a second base station, and communication occurs between the first base station and the second base station via a wireless channel. Another example is that the first node 110 is a first terminal and the second node 120 is a second terminal, and communication occurs between the first terminal and the second terminal via a wireless channel. Another example is that the first node 110 is a repeater and the second node 120 is a base station, and communication occurs between the base station and the repeater via a wireless channel. Another example is that the first node 110 is a terminal and the second node 120 is a repeater, and communication occurs between the repeater and the terminal via a wireless channel. Another example is that the first node 110 is a first repeater and the second node 120 is a second repeater, and communication occurs between the first repeater and the second repeater via a wireless channel. Another example is that the first node 110 is a base station and the second node 120 is a satellite, and communication occurs between the satellite and the base station via a wireless channel. Another example is that the first node 110 is a satellite and the second node 120 is a base station, and communication occurs between the base station and the satellite via a wireless channel. Another example is that the first node 110 is a terminal and the second node 120 is a satellite, and communication occurs between the satellite and the terminal via a wireless channel. Another example is that the first node 110 is a satellite and the second node 120 is a terminal, and communication occurs between the terminal and the satellite via a wireless channel. Another example is that the first node 110 is a ground device and the second node 120 is an aircraft, and communication occurs between the aircraft and the ground device via a wireless channel. Another example is that the first node 110 is a first aircraft and the second node 120 is a second aircraft, and communication occurs between the first aircraft and the second aircraft via a wireless channel.

[0076] In the present disclosure, the "first" node, "second" node, "first" method, "second" method, "first" matrix, "second" matrix, "first" part, "second" part, unless otherwise specified, are only used for descriptive distinction and do not represent a front-back or sequence order.

[0077] In the present disclosure, the base station may be a base station in Long Term Evolution (LTE), Long Term Evolution Advanced (LTE-A), or an evolved Node B (eNB or eNodeB), a base station device in a 5G network, or a base station in a future mobile communication system (such as 6G, etc.). The base station may include various macro base stations, micro base stations, home base stations, remote radio heads, reconfigurable intelligent surfaces (RISs), routers, Wireless Fidelity (WIFI) devices, or various network-side devices such as a primary cell and a secondary cell.

[0078] In the present disclosure, the terminal is a device with wireless transceiver functions, which can be deployed on land, including indoors or outdoors; it can also be deployed on the water (such as a ship, etc.); it can also be deployed in the air (such as an airplane, a balloon, a satellite, etc.). The terminal may be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver functions, a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, and so on. The embodiments of the present disclosure do not limit the application scenarios. The terminal can sometimes also be referred to as a user, a user equipment, an access terminal, a UE unit, a UE station, a mobile station, a mobile device, a remote station, a remote terminal, a mobile device, a UE terminal, a wireless communication device, a UE agent, or a UE device, etc. The embodiments of the present disclosure do not limit this.

[0079] It should be understood that Figure 3 is an exemplary structural diagram, Figure 3 The number of devices included in the communication system shown is not limited. For example, the number of the first node and the second node is not limited. And, in addition to Figure 3 the devices shown, Figure 3 the communication system shown may also include other devices, which are not limited herein.

[0080] Next, as Figure 4 shown, an embodiment of the present disclosure provides a synchronization signal transmission method, which is applied to a first node. The first node may be the first node 110 as described above Figure 3 shown. The method may include the following steps:

[0081] S101. Determine the time domain position of the candidate SSB based on the SSB pattern.

[0082] In some embodiments, when the first node receives the SSB, the first node may determine the time domain position of the SSB based on the SSB pattern, and then receive the SSB based on the time domain position of the candidate SSB.

[0083] Among them, the SCS candidate set of the candidate SSB includes 60KHz, and the number of OFDM symbols included in the candidate SSB is greater than or equal to 4.

[0084] In some embodiments, the SSB pattern is predefined or configured by the network side. The configuration by the network side may be indicated by a second node. The second node may be the second node 120 as described above Figure 3 shown. For ease of description, the following embodiments will take the first node as a terminal and the second node as a base station as an example to illustrate a synchronization signal transmission method provided by an embodiment of the present disclosure.

[0085] It should be understood that in the related art, SCS supports 15KHz, 30KHz, 120KHz, and 240KHz, and 60KHz is not defined. In addition, in the related art, the number of OFDM symbols included in the SSB is 4. In order to provide large bandwidth support for future mobile communication systems and improve the accuracy of receiving the SSB, an embodiment of the present disclosure provides a new SSB pattern. The SCS candidate set of the candidate SSB configured (indicated) by the new SSB pattern includes 60KHz, and the number of OFDM symbols included in the candidate SSB is greater than or equal to 4.

[0086] The following describes the determination of the time domain position of the candidate SSB based on the SSB pattern, which may include the following examples.

[0087] Example 1: The SCS of the candidate SSB is 60KHz, and the number of OFDM symbols included in the candidate SSB is 4. That is, the SCS is equal to 60KHz, and the SSB pattern of the candidate SSB with 4 consecutive OFDM symbols.

[0088] Assumptions on time-frequency domain resource description: In a typical time-frequency domain resource setting, the granularity in the time domain is a slot, and the granularity in the frequency domain is a physical resource block (PRB). For the convenience of describing physical time-frequency domain resources, hereinafter, each PRB (physical resource block) per slot is uniformly simplified to each PRB, that is, the PRB represents the resources in both the time and frequency dimensions. The length of the slot may change proportionally according to the subcarrier spacing parameter SCS of the symbol. For example, the slot corresponding to a 15KHz OFDM symbol is 1ms, containing 14 regular OFDM symbols, while the slot corresponding to a 30KHz OFDM symbol is 0.5ms, and so on for other subcarrier cases. The frequency resources contained in a physical resource block are 12 REs. The above assumptions are just one possible configuration, and the number of symbols in the slot and the number of frequency resources REs in the PRB may both change.

[0089] When adopting a candidate SSB structure based on 4 consecutive OFDM symbols, if the symbol subcarrier spacing SCS of the candidate SSB is 60KHz, then at least three limiting factors need to be considered for the time domain positions or SSB patterns of multiple candidate SSBs within a single period suitable for 60KHz. The first limiting factor is the need to reserve time resources for transmitting the downlink control channel, the second limiting factor is the need to reserve time resources for the uplink control channel, and in necessary cases, a guard period (GP) from downlink to uplink also needs to be added. The third limiting factor is to try to concentrate multiple candidate SSBs to be polled within a half-frame for transmission, unless the upper limit Lmax of the number of candidate SSBs to be polled is too large to concentrate all candidate SSBs within a half-frame. The first two limiting factors are factors with relatively high compulsoriness, among which the constraint of reserving the downlink control channel is the strongest, and the third limiting factor can be appropriately relaxed according to the specific configuration of Lmax.

[0090] The downlink control channel and the uplink control channel may adopt the same SCS = 60KHz as the candidate SSB, or may adopt SCS = 15KHz, 30KHz, 120KHz, 240KHz, etc. Among these, the possibilities of adopting 30KHz, 60KHz, and 120KHz are the highest. When data such as 15KHz, 30KHz, 60KHz, 120KHz, and 240KHz appear hereinafter, they are defaultly referred to as subcarrier spacing parameters.

[0091] The upper limit Lmax of the number of candidate SSBs can be assumed to take values such as 4, 8, 16, 32, or 64, etc. Among these, for the frequency band facing the mid-frequency of U6G, the values 8 and 16 can be considered. If considering a frequency band higher than U6G but lower than FR2, the value 32 can also be considered.

[0092] Based on the different combinations of the above parameters and the limiting factors, the time-domain position of the candidate SSB, i.e., the SSB pattern, can be designed in multiple ways as follows.

[0093] I: When considering that the candidate SSB of 60KHz needs to reserve the control channel time resources based on 15KHz and 30KHz, as Figure 5 shown, Figure 5 shown in the schematic diagram of the control channel time resources for reserving 15KHz and 30KHz symbols provided by the embodiments of the present disclosure. It should be understood that Figure 5 it can also be understood as a schematic diagram of the SSB pattern.

[0094] See Figure 5 , the time-domain resources corresponding to the first 8 symbols at the beginning of the first 60kHz time slot are reserved: Considering coexistence with the time slots based on 15kHz and 30KHz, it is allowed to be used for downlink control channel transmission;

[0095] The time-domain resources corresponding to the last 4 symbols at the end of the second 60kHz time slot are reserved: It can be used for the uplink control channel transmission based on 30kHz and may include guard time;

[0096] The time-domain resources corresponding to the first 4 symbols at the beginning of the third 60kHz time slot are reserved: It can be used for the downlink control channel transmission based on 30kHz;

[0097] The time-domain resources corresponding to the last 8 symbols at the end of the fourth 60kHz time slot are reserved: It can be used for the uplink control channel transmission based on 15kHz and 30KHz and may include guard time.

[0098] The above control channel can also be replaced by a data channel, etc.

[0099] Up to 8 SSBs can be transmitted within 1ms, and up to 16 SSBs can be transmitted within 2ms. When the starting point of the SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the form of text and formulas.

[0100] For a half-frame or frame with SSB, the index of the first symbol of the candidate SSB is determined as follows according to the SCS = 60KHz of the SSB, where index 0 corresponds to the first symbol of the first time slot in the half-frame or frame.

[0101] The first symbol of the candidate SSB has the following index: {8, 12, 16, 20, 32, 36, 40, 44} + 56×n, where n = 0 or n = 0, 1, where n = 0 corresponds to the configuration of Lmax = 8, and n = 0, 1 corresponds to the configuration of Lmax = 16.

[0102] As Figure 5As shown, the starting point of a semi-frame or intra-frame candidate SSB group starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. Accordingly, the index expression in the above formula is increased by the corresponding relative time offset, and the time offset should be at least not less than the number of symbols in one time slot. One way of offset is as follows:

[0103] The first symbol of the candidate SSB has the following index: {8, 12, 16, 20, 32, 36, 40, 44} + 56×n + 14×k, where n = 0 or n = 0, 1, n = 0 corresponds to the configuration of Lmax = 8, and n = 0, 1 corresponds to the configuration of Lmax = 16, and k is an integer greater than 0.

[0104] Figure 5 The time domain position of the shown candidate SSB is suitable for the scenario where candidate SSBs with SCS = 60KHz coexist with non-SSB symbols of 15kHz or 30KHz, but the adaptability to the scenario where it coexists with non-SSB symbols of 60kHz or 120KHz is relatively low because sufficient time domain resources for downlink and uplink control channels are not reserved for 60kHz or 120KHz time slots.

[0105] II: When considering that candidate SSBs with SCS = 60KHz need to reserve control channel time resources based on 15KHz, 30KHz, 60KHz, and 120KHz, as Figure 6 shown, Figure 6 shown is a schematic diagram of reserving control channel time resources for 30KHz and 60KHz symbols provided by an embodiment of the present disclosure. It should be understood that Figure 6 it can also be understood as another schematic diagram of the SSB pattern.

[0106] See Figure 6 , the time domain resources corresponding to the first 4 symbols at the beginning of the first 60kHz time slot are reserved: Considering coexistence with time slots of 15kHz, 30KHz, 60KHz, and 120KHz subcarrier spacings, it is allowed for downlink control channel transmission, where the maximum number of downlink control channels for 15KHz is 1 symbol, the maximum number of downlink control channels for 30KHz is 2 symbols, the maximum number of downlink control channels for 60KHz is 4 symbols, and the maximum number of downlink control channels for 120KHz is 8 symbols;

[0107] The time domain resources corresponding to the last 2 symbols at the end of the first 60kHz time slot are reserved: It can be used for uplink control channel transmission of 60kHz and 120kHz, and may include guard time;

[0108] The time-domain resources corresponding to the first 2 symbols at the start of the second 60 kHz time slot are reserved: Considering coexistence with time slots having 60 KHz and 120 KHz subcarrier spacings, it is allowed for downlink control channel transmission, where the downlink control channel for 60 KHz is at most 2 symbols and the maximum for 120 KHz is 4 symbols;

[0109] The time-domain resources corresponding to the last 4 symbols at the end of the second 60 kHz time slot are reserved: It can be used for uplink control channel transmission of 30 kHz, 60 KHz, and 120 kHz, and may include guard time;

[0110] The time-domain resources corresponding to the first 4 symbols at the start of the third 60 kHz time slot are reserved: It can be used for downlink control channel transmission of 30 kHz, 60 KHz, and 120 kHz, similar to the reservation of the first 60 KHz time slot;

[0111] The time-domain resources corresponding to the last 2 symbols at the end of the third 60 kHz time slot are reserved: It can be used for uplink control channel transmission of 60 kHz and 120 kHz, and may include guard time;

[0112] The time-domain resources corresponding to the first 2 symbols at the start of the fourth 60 kHz time slot are reserved: Considering coexistence with time slots having 60 KHz and 120 KHz subcarrier spacings, it is allowed for downlink control channel transmission, where the downlink control channel for 60 KHz is at most 2 symbols and the maximum for 120 KHz is 4 symbols;

[0113] The time-domain resources corresponding to the last 4 symbols at the end of the fourth 60 kHz time slot are reserved: It can be used for uplink control channel transmission of 15 kHz, 30 KHz, and 120 kHz, and may include guard time.

[0114] In Figure 6 In the shown SSB pattern, the uplink control channel transmission in the 120 kHz time slot can only ensure that at least 2 time slots appear once, and it is impossible to have it in every time slot. The downlink and uplink control channels in the 15 KHz time slot can ensure at most 1 symbol, that is, it takes into account the coexistence of 15 KHz and 120 kHz time slots.

[0115] The above control channels can also be replaced by data channels, etc.

[0116] In 1 ms, at most 8 SSBs can be transmitted, and in 2 ms, at most 16 SSBs can be transmitted. When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, this SSB pattern can be expressed in the form of text and formulas.

[0117] For a half-frame or frame with SSB, the index of the first symbol of a candidate SSB is determined as follows according to the candidate SSB's SCS = 60 KHz, where index 0 corresponds to the first symbol of the first time slot in the half-frame or frame.

[0118] The first symbol of the candidate SSB has the following indices: {4, 8, 16, 20} + 28×n, where n = 0, 1 or n = 0, 1, 2, 3. n = 0, 1 corresponds to the configuration with Lmax = 8, while n = 0, 1, 2, 3 corresponds to the configuration with Lmax = 16.

[0119] As Figure 6 shown, the starting point of the SSB group within the half-frame or frame starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. The corresponding index expression in the above formula is increased by the corresponding relative time offset, and the time offset should be at least not less than the number of symbols within one time slot. One way of offset is as follows:

[0120] The first symbol of the candidate SSB has the following indices: {4, 8, 16, 20} + 28×n + 14×k, where n = 0, 1 or n = 0, 1, 2, 3. n = 0, 1 corresponds to the configuration with Lmax = 8, while n = 0, 1, 2, 3 corresponds to the configuration with Lmax = 16, and k is an integer greater than 0.

[0121] Figure 6 The SSB pattern shown takes into account the coexistence with other non-SSB channels in 30 kHz and 60 KHz time slots.

[0122] III: The previous SSB pattern considered the coexistence with 30 kHz and 60 KHz time slots, but the optimization degree for the coexistence with other non-SSB channels in 15 KHz and 120 kHz time slots is not high. The following Figure 7 shown SSB pattern focuses on the sufficient coexistence with other non-SSB channels in 60 kHz and 120 KHz time slots. Figure 7 This is a schematic diagram of the control channel time resource reserving 60 KHz and 120 KHz symbols provided by an embodiment of the present disclosure. It should be understood that Figure 7 it can also be understood as another schematic diagram of the SSB pattern.

[0123] See Figure 7 , the time domain resources corresponding to the first 2 symbols at the beginning of the first 60 kHz time slot are reserved: Considering the coexistence with time slots with 30 KHz, 60 KHz and 120 KHz subcarrier spacings, it is allowed to be used for downlink control channel transmission, where the downlink control channel of 30 KHz has at most 1 symbol, the downlink control channel of 60 KHz has at most 2 symbols, and the downlink control channel of 120 KHz has at most 4 symbols;

[0124] The time-domain resources corresponding to the middle two symbols of the first 60 kHz time slot are reserved: They can be used for the transmission of the 120 kHz uplink control channel (two symbols) and the downlink channel (two symbols), and may include guard time;

[0125] The time-domain resources corresponding to the last two symbols of the first 60 kHz time slot are reserved: They can be used for the transmission of the 60 KHz and 120 kHz uplink control channels, and may include guard time;

[0126] The time-domain resources corresponding to the first two symbols of the second 60 kHz time slot are reserved: Considering coexistence with time slots having 60 KHz and 120 KHz subcarrier spacings, it is allowed to be used for the transmission of the downlink control channel, where the 60 KHz downlink control channel is at most two symbols, and the 120 KHz downlink control channel is at most four symbols;

[0127] The time-domain resources corresponding to the middle two symbols of the second 60 kHz time slot are reserved: They can be used for the transmission of the 120 kHz uplink control channel (two symbols) and the downlink channel (two symbols), and may include guard time;

[0128] The time-domain resources corresponding to the last two symbols of the second 60 kHz time slot are reserved: They can be used for the transmission of the 30 kHz, 60 KHz, and 120 kHz uplink control channels, and may include guard time, but the 30 kHz time slot allows at most one symbol for the control channel;

[0129] The time-domain resources corresponding to the first two symbols of the third 60 kHz time slot are reserved: They can be used for the transmission of the 30 kHz, 60 KHz, and 120 kHz downlink control channels, where the 30 KHz downlink control channel is at most one symbol, the 60 KHz downlink control channel is at most two symbols, and the 120 KHz downlink control channel is at most four symbols;

[0130] The time-domain resources corresponding to the middle two symbols of the third 60 kHz time slot are reserved: They can be used for the transmission of the 120 kHz uplink control channel (two symbols) and the downlink channel (two symbols), and may include guard time;

[0131] The time-domain resources corresponding to the last two symbols of the third 60 kHz time slot are reserved: They can be used for the transmission of the 60 kHz and 120 kHz uplink control channels, and may include guard time;

[0132] The time-domain resources corresponding to the first two symbols of the fourth 60 kHz time slot are reserved: Considering coexistence with time slots having 60 KHz and 120 KHz subcarrier spacings, it is allowed to be used for the transmission of the downlink control channel, where the 60 KHz downlink control channel is at most two symbols, and the 120 KHz downlink control channel is at most four symbols;

[0133] The middle 2 symbols corresponding to the fourth 60 kHz time slot have reserved time-domain resources: They can be used for the transmission of the 120 kHz uplink control channel (2 symbols) and the downlink channel (2 symbols), and may include guard time;

[0134] The last 2 symbols corresponding to the fourth 60 kHz time slot have reserved time-domain resources: They can be used for the transmission of the uplink control channel of 30 kHz, 60 KHz, and 120 KHz, and may include guard time, but the 30 kHz time slot allows a maximum of 1 symbol for the control channel.

[0135] In Figure 7 In the shown SSB pattern, the transmission of the 60KHz and 120kHz uplink and downlink control channels can fully guarantee that at least 1 time slot appears once. Figure 7 The shown SSB pattern is better for the coexistence of 60 kHz and 120 KHz time slots.

[0136] Up to 8 SSBs can be transmitted within 1 ms, and up to 16 SSBs can be transmitted within 2 ms. When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the form of text and formula.

[0137] For a half-frame or frame with SSB, the index of the first symbol of the candidate SSB is determined as follows according to the candidate SSB's SCS = 60KHz, where index 0 corresponds to the first symbol of the first time slot in the half-frame or frame.

[0138] The first symbol of the candidate SSB has the following index: {2, 8, 16, 22} + 28×n, where n = 0, 1 or n = 0, 1, 2, 3, where n = 0, 1 corresponds to the configuration of Lmax = 8, and n = 0, 1, 2, 3 corresponds to the configuration of Lmax = 16.

[0139] Since the interval between symbol indices {2, 16} and {8, 22} is 14, the above formula for symbol indices can also be rewritten in a more concise way.

[0140] The first symbol of the candidate SSB has the following index: {2, 8} + 14×n, where n = 0, 1, 2, 3 or n = 0, 1, 2, 3, 4, 5, 6, 7, where n = 0, 1, 2, 3 corresponds to the configuration of Lmax = 8, and n = 0, 1, 2, 3, 4, 5, 6, 7 corresponds to the configuration of Lmax = 16.

[0141] As Figure 7As shown, the starting point of the semi-frame or intra-frame candidate SSB group starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. Accordingly, the index expression in the above formula is increased by the corresponding relative time offset, and the time offset should be at least not less than the number of symbols in one time slot. One way of offset is as follows:

[0142] The first symbol of the candidate SSB has the following index: {2, 8, 16, 22} + 28×n + 14×k, where n = 0, 1 or n = 0, 1, 2, 3, n = 0, 1 corresponds to the configuration of Lmax = 8, and n = 0, 1, 2, 3 corresponds to the configuration of Lmax = 16, and k is an integer greater than 0.

[0143] Alternatively, the first symbol of the candidate SSB has the following index: {2, 8} + 14×n + 14×k, where n = 0, 1, 2, 3 or n = 0, 1, 2, 3, 4, 5, 6, 7, and k is an integer greater than 0.

[0144] It should be noted that all the SSB patterns designed above can be extended from Lmax = 16 to the configuration of Lmax = 32, and the value range of n can be expanded. When n = 0, 1 corresponds to Lmax = 16, it is modified to n = 0, 1, 2, 3; when n = 0, 1, 2, 3 corresponds to Lmax = 16, it is modified to n = 0, 1, 2, 3, 4, 5, 6, 7.

[0145] It should be noted that all the SSB patterns involved above and subsequently belong to the time domain positions of the candidate SSBs. The actual transmission of the SSB can be selected from the time domain positions of the candidate SSBs, and it is not mandatory to use all the time domain positions.

[0146] Example 1 shows several SSB time domain position schemes when the SCS of the candidate SSB is 60KHz and considering coexistence with non-SSB channels of 15KHz, 30KHz, 60KHz, and 120kHz respectively:

[0147] I: The index of the first symbol of the candidate SSB is determined as follows according to the SCS = 60KHz of the candidate SSB, where index 0 corresponds to the first symbol of the first time slot in the semi-frame or frame. Or,

[0148] The first symbol of the candidate SSB has the following index: {8, 12, 16, 20, 32, 36, 40, 44} + 54×n, where n = 0 or n = 0, 1. Or,

[0149] II: The index of the first symbol of the candidate SSB is determined as follows according to the SCS = 60KHz of the candidate SSB, where index 0 corresponds to the first symbol of the first time slot in the semi-frame or frame. Or,

[0150] The first symbol of the candidate SSB has the following indices: {4, 8, 16, 20} + 28×n, where n = 0, 1 or n = 0, 1, 2, 3. Or,

[0151] III: The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 60KHz, where index 0 corresponds to the first symbol of the first time slot in a half - frame or a frame. Or,

[0152] The first symbol of the candidate SSB has the following indices: {2, 8, 16, 22} + 28×n, where n = 0, 1 or n = 0, 1, 2, 3. Or,

[0153] The first symbol of the candidate SSB has the following indices: {2, 8} + 14×n, where n = 0, 1, 2, 3 or n = 0, 1, 2, 3, 4, 5, 6, 7.

[0154] If the starting point of the candidate SSB starts from a non - first time slot in a half - frame or a frame, the index value in the above symbol index formula is increased by a relative time offset of 14×k, where k is an integer greater than 0.

[0155] For the configuration where Lmax = 16 is extended to Lmax = 32, the range of values of n is expanded. When n = 0, 1 corresponds to Lmax = 16, it is modified to n = 0, 1, 2, 3; when n = 0, 1, 2, 3 corresponds to Lmax = 16, it is modified to n = 0, 1, 2, 3, 4, 5, 6, 7.

[0156] Combined with the description of Example 1 above, in some embodiments, when the SCS of the candidate SSB is 60KHz and the number of OFDM symbols included in the candidate SSB is 4, the index of the first symbol of the candidate SSB is determined based on the following formula:

[0157] {8, 12, 16, 20, 32, 36, 40, 44} + 54×n, where n = 0 or n = 0, 1; or,

[0158] {4, 8, 16, 20} + 28×n, where n = 0, 1 or n = 0, 1, 2, 3; or,

[0159] {2, 8, 16, 22} + 28×n, where n = 0, 1 or n = 0, 1, 2, 3; or,

[0160] {2, 8} + 14×n, where n = 0, 1, 2, 3 or n = 0, 1, 2, 3, 4, 5, 6, 7.

[0161] In some examples, when the first symbol of a candidate SSB does not lie in the first time slot of a half-frame or a frame, the index of the first symbol of the candidate SSB is obtained based on a time offset, where the number of symbols included in the time offset is greater than or equal to the number of symbols within a time slot. The half-frame is the half-frame with the SSB, and the frame is the frame with the SSB. The content of this example also applies to Examples 2 to 6 below and will not be elaborated further.

[0162] As a possible example, when the first symbol of a candidate SSB does not lie in the first time slot of a half-frame or a frame, the index of the first symbol of the candidate SSB is obtained based on the index obtained from a formula and a time offset. The index determination method shown in this possible example also applies to Examples 2 to 4 below and will not be elaborated further.

[0163] In some examples, when the index of the first symbol of a candidate SSB is 0, the first symbol of the candidate SSB lies in the first symbol of the first time slot in the half-frame or the frame. The content of this example also applies to Examples 2 to 6 below and will not be elaborated further.

[0164] In some examples, when the number X of candidate SSBs supported by an SSB pattern is less than the number Z of candidate SSBs supported by another SSB pattern, the X candidate SSBs supported by the SSB pattern are any X of the Z candidate SSBs supported by the other SSB pattern, or are the first X in the time domain positions among the Z candidate SSBs supported by the other SSB. Both X and Z are positive integers. The content of this example also applies to Examples 2 to 6 below and will not be elaborated further.

[0165] In some examples, when the number X of candidate SSBs supported by an SSB pattern is greater than the number Z of candidate SSBs supported by another SSB pattern, the Z candidate SSBs supported by the other SSB pattern are any Z of the X candidate SSBs supported by the SSB pattern, or are the first Z in the time domain positions among the X candidate SSBs supported by the SSB pattern. The content of this example also applies to Examples 2 to 6 below and will not be elaborated further.

[0166] That is to say, among the candidate SSBs supported by an SSB pattern with a larger Lmax, candidate SSBs can be arbitrarily selected or the candidate SSBs at the front can be selected as the candidate SSBs in the SSB pattern with a smaller Lmax.

[0167] Example 2: The number of OFDM symbols included in the candidate SSB is 5.

[0168] When more than 4 consecutive OFDM symbols are adopted, for example, when candidate SSB structures based on 5, 6, 7, 8, 9, 10, 12 symbols, etc. are selected, the symbol subcarrier spacing of the candidate SSB can consider various parameter configurations such as 15KHz, 30KHz, 60KHz, 120KHz, 240KHz, etc. The candidate SSB pattern also needs to consider the three limiting factors mentioned in Example 1.

[0169] The downlink control channel, the uplink control channel, and other channels may adopt the same SCS as the candidate SSB, or may adopt an SCS inconsistent with the candidate SSB. There are various combinations of SCSs considering the coexistence of SSB and non-SSB channels. When the SCS of the candidate SSB = 15KHz, the SCS of the non-SSB channel can be considered as 15kHz, 30KHz; when the SCS of the candidate SSB = 30KHz, the SCS of the non-SSB channel can be considered as 15kHz, 30KHz or 60KHz; when the SCS of the candidate SSB = 60KHz, the SCS of the non-SSB channel can be considered as 30kHz, 60KHz or 120KHz; when the SCS of the candidate SSB = 120KHz, the SCS of the non-SSB channel is considered as 60kHz, 120KHz; when the SCS of the candidate SSB = 240KHz, the SCS of the non-SSB channel is considered as 120KHz or 240KHz. When it is difficult for all the recommended SCS combinations to coexist, ensure the combination where the SCS of other non-SSB channels is equal to the SCS of the candidate SSB.

[0170] The upper limit Lmax of the number of candidate SSBs can be assumed to take values such as 4, 8, 16, 32, 64, or 128, etc. For low- and medium-frequency bands, values of 4, 8, 16 can be considered; for high-frequency bands, values of 32, 64 can be considered.

[0171] According to the above different combinations of parameters and limiting factors, the following various designs can be made for the time domain position of the candidate SSB, that is, the SSB pattern.

[0172] I: When considering that the candidate SSB with SCS = 15KHz needs to reserve time resources for control or other channels based on 15KHz and 30KHz, as Figure 8 shown, it is a schematic diagram of a 15KHz candidate SSB and an SSB pattern of 5 OFDM symbols provided by an embodiment of the present disclosure.

[0173] See Figure 8 and the time domain resources corresponding to the first 2 symbols at the beginning of the first 15kHz time slot are reserved: allowed to be used for downlink control channel transmission, where the maximum number of symbols of the 15KHz downlink control channel is 2, and the maximum number of symbols of the 30KHz downlink control channel is 4;

[0174] The time-domain resources corresponding to the last 2 symbols of the first 15 kHz time slot are reserved: They can be used for the uplink control channel transmission of 15 KHz and 30 KHz, and may include guard time;

[0175] In this pattern, the uplink and downlink control channel transmissions of 15 kHz can fully ensure that at least one time slot appears once, but the coexistence with the 30 kHz time slots is not good enough, and it can only ensure that the uplink and downlink control channel transmissions of 30 kHz appear at least twice in a time slot.

[0176] When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the form of text and formulas. For a half-frame or frame with SSB, the index of the first symbol of the candidate SSB is determined as follows according to the SCS = 15 KHz of the candidate SSB, where index 0 corresponds to the first symbol of the first time slot in the half-frame or frame.

[0177] The first symbol of the candidate SSB has the following index: {2, 7} + 14×n, where n = 0, 1 or n = 0, 1, 2, 3. Among them, n = 0, 1 corresponds to the configuration of Lmax = 4, and at this time, the SSB in the period needs to occupy two time slots; while n = 0, 1, 2, 3 corresponds to the configuration of Lmax = 8, and at this time, the SSB in the period needs to occupy four time slots.

[0178] As Figure 8 shown, the starting point of the candidate SSB group in the half-frame or frame starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. The corresponding index expression in the above formula increases the corresponding relative time offset, and the time offset should be at least not less than the number of symbols in one time slot. A typical offset method is as follows:

[0179] The first symbol of the candidate SSB has the following index: {2, 7} + 14×n + 14×k, where n = 0, 1 or n = 0, 1, 2, 3, and k is an integer greater than 0.

[0180] If it is necessary to coexist with the 30 KHz channel as much as possible, then Figure 8 it can be further modified to obtain Figure 9 , as Figure 9 shown, it is a schematic diagram of another 15 KHz candidate SSB and the SSB pattern of 5 OFDM symbols provided by the embodiment of the present disclosure.

[0181] See Figure 9 , the time-domain resources corresponding to the first 1 symbol of the first 15 kHz time slot are reserved: It is allowed to be used for the downlink control channel transmission, where the downlink control channel of 15 KHz has at most 1 symbol, and the downlink control channel of 30 KHz has at most 2 symbols;

[0182] The time domain resources corresponding to the middle 2 symbols of the first 15 kHz time slot are reserved: They can be used for the uplink control channel transmission of 30 kHz (which may include guard time) and the downlink control channel.

[0183] The time domain resources corresponding to the last 1 symbol of the first 15 kHz time slot are reserved: They can be used for the uplink control channel transmission of 15 KHz and 30 kHz (which may include guard time).

[0184] In Figure 9 In the SSB pattern shown, coexistence with 30 KHz is better, which can ensure that the uplink and downlink control channel transmissions of 30 kHz can fully guarantee that at least one time slot appears once, but the number of control channel symbols of 15 KHz is limited.

[0185] When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the form of text and formulas. For a half-frame or frame with SSB, the index of the first symbol of the candidate SSB is determined as follows according to the SCS = 15 KHz of the candidate SSB, where index 0 corresponds to the first symbol of the first time slot in the half-frame or frame.

[0186] The first symbol of the candidate SSB has the following index: {1, 8} + 14×n, where n = 0, 1 or n = 0, 1, 2, 3. Among them, n = 0, 1 corresponds to the configuration of Lmax = 4, and at this time, the SSB in the period needs to occupy two time slots; while n = 0, 1, 2, 3 corresponds to the configuration of Lmax = 8, and at this time, the SSB in the period needs to occupy four time slots.

[0187] As Figure 9 shown, the starting point of the candidate SSB group in the half-frame or frame starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. The corresponding index expression in the above formula increases the corresponding relative time offset, and the time offset should be at least not less than the number of symbols in one time slot. One offset method is as follows:

[0188] The first symbol of the candidate SSB has the following index: {1, 8} + 14×n + 14×k, where n = 0, 1 or n = 0, 1, 2, 3, and k is an integer greater than 0.

[0189] If the SSB pattern in the period needs to be restricted within a half-frame, then Lmax = 16 cannot be extended. If it needs to be extended, the half-frame restriction needs to be broken, which will be reflected in the subsequent embodiments.

[0190] II: When considering that the candidate SSB with SCS = 30 KHz needs to reserve the control or other channel time resources based on 15 KHz and 30 KHz, as Figure 10As shown, it is a schematic diagram of a 30KHz candidate SSB and an SSB pattern of 5 OFDM symbols provided by an embodiment of the present disclosure.

[0191] See Figure 10 , the time-domain resources corresponding to the first 2 symbols at the beginning of the first 30kHz time slot are reserved: allowed to be used for downlink control channel transmission, where the maximum number of 15KHz downlink control channels is 1 symbol, and the maximum number of 30KHz downlink control channels is 2 symbols;

[0192] The time-domain resources corresponding to the last 2 symbols at the end of the first 30kHz time slot are reserved: can be used for 30kHz uplink control channel transmission (possibly including guard time);

[0193] The resource reservation at the beginning and end of the second 30kHz time slot is the same as that of the first time slot.

[0194] In Figure 10 the SSB pattern shown, coexisting with the 30KHz non-SSB channel is preferred, which can ensure that the uplink and downlink control channel transmissions of 30kHz can fully ensure that at least one time slot appears once, but the number of control channel symbols of 15KHz is limited.

[0195] When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the form of text and formulas. For a half-frame or frame with SSB, the index of the first symbol of the candidate SSB is determined as follows according to the candidate SSB's SCS = 30KHz, where index 0 corresponds to the first symbol of the first time slot in the half-frame or frame.

[0196] The first symbol of the candidate SSB has the following index: {2,7} + 14×n, where n = 0,1 or n = 0,1,2,3, where n = 0,1 corresponds to the configuration of Lmax = 4, and at this time the candidate SSB within the period needs to occupy two time slots; while n = 0,1,2,3 corresponds to the configuration of Lmax = 8, and at this time the candidate SSB within the period needs to occupy four time slots.

[0197] As Figure 10 shown, the starting point of the candidate SSB group within the half-frame or frame starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. The corresponding index expression in the above formula increases the corresponding relative time offset, and the time offset should be at least not less than the number of symbols within one time slot. One offset method is as follows:

[0198] The first symbol of the candidate SSB has the following index: {2,7} + 14×n + 14×k, where n = 0,1 or n = 0,1,2,3, and k is an integer greater than 0.

[0199] III: When considering that control or other channel time resources based on 30KHz, 60KHz, and 120KH need to be reserved for candidate SSBs with SCS = 60KHz, as Figure 11 shown, it is a schematic diagram of a 60KHz candidate SSB and an SSB pattern of 5 OFDM symbols provided by an embodiment of the present disclosure.

[0200] See Figure 11 , the time-domain resources corresponding to the first 2 symbols at the beginning of the first 60kHz time slot are reserved: allowed for downlink control channel transmission, where the maximum number of 30KHz downlink control channels is 1 symbol, and the maximum number of 60KHz downlink control channels is 2 symbols;

[0201] The time-domain resources corresponding to the last 2 symbols at the end of the first 60kHz time slot are reserved: available for uplink control channel transmission of 30kHz or 60KHz (possibly including guard time);

[0202] The resource reservation at the beginning and end of the second, third, and fourth 60kHz time slots is the same as that of the first time slot.

[0203] In Figure 11 the shown SSB pattern, coexisting with the 60KHz non-SSB channel is optimal, which can ensure that the uplink and downlink control channel transmissions of 30KHz and 60kHz can fully guarantee to appear at least once in one time slot. Coexisting with the 30KHz non-SSB channel is sub-optimal, and the number of 30KHz control channel symbols is limited. It cannot fully coexist with 120KHz, and the uplink and downlink control channel transmissions can only guarantee to appear at least once in two time slots.

[0204] When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the form of text and formulas. For a half-frame or frame with SSB, the index of the first symbol of the candidate SSB is determined as follows according to SCS = 60KHz of the SSB, where index 0 corresponds to the first symbol of the first time slot in the half-frame or frame.

[0205] The first symbol of the candidate SSB has the following index: {2,7}+14×n, where n = 0,1,2,3 or n = 0,1,2,3,4,5,6,7, where n = 0,1 corresponds to the configuration of Lmax = 8, and in this case, the candidate SSB needs to occupy four time slots within a period; while n = 0,1,2,3,4,5,6,7 corresponds to the configuration of Lmax = 16, and in this case, the candidate SSB needs to occupy eight time slots within a period.

[0206] As Figure 11As shown, the starting point of the semi-frame or intra-frame candidate SSB group starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. The corresponding index expression in the above formula is increased by the corresponding relative time offset, and the time offset should be at least not less than the number of symbols in one time slot. One offset method is as follows:

[0207] The first symbol of the candidate SSB has the following index: {2,7}+14×n+14×k, where n = 0,1,2,3 or n = 0,1,2,3,4,5,6,7, and k is an integer greater than 0.

[0208] If it is necessary to coexist with the 120KHz channel as much as possible, then Figure 11 it can be further modified to Figure 12 , Figure 12 is a schematic diagram of another 60KHz candidate SSB and an SSB pattern of 5 OFDM symbols provided by the embodiments of the present disclosure.

[0209] See Figure 12 , the time domain resources corresponding to the first 1 symbol at the beginning of the first 60kHz time slot are reserved: allowed for downlink control channel transmission, where the downlink control channel of 60KHz is at most 1 symbol, and the downlink control channel of 120KHz is at most 2 symbols;

[0210] The time domain resources corresponding to the middle 2 symbols of the first 60kHz time slot are reserved: allowed for uplink control channel transmission (possibly including guard time) and downlink control channel transmission, where the control channel of 60KHz is at most 1 symbol, and the control channel of 120KHz is at most 2 symbols;

[0211] The time domain resources corresponding to the last 1 symbol of the first 60kHz time slot are reserved: can be used for uplink control channel transmission of 60kHz or 120KHz (possibly including guard time);

[0212] The resource reservation of the second, third, and fourth 60kHz time slots is the same as that of the first time slot.

[0213] In this pattern, coexistence with the 60KHz non-SSB channel is sub-optimal compared to the previous pattern, but it can ensure full coexistence with 120KHz. The 120KHz uplink and downlink control channel transmissions can ensure that at least one time slot appears once and the number of control channel symbols can reach two symbols.

[0214] When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the form of text and formula. For a half-frame or frame with SSB, the index of the first symbol of the candidate SSB is determined as follows according to the SCS = 60KHz of the candidate SSB, where index 0 corresponds to the first symbol of the first time slot in the half-frame or frame.

[0215] The first symbol of the candidate SSB has the following index: {1,8}+14×n, where n = 0,1,2,3 or n = 0,1,2,3,4,5,6,7, where n = 0,1 corresponds to the configuration of Lmax = 8, and at this time the candidate SSB within the period needs to occupy four time slots; while n = 0,1,2,3,4,5,6,7 corresponds to the configuration of Lmax = 16, and at this time the candidate SSB within the period needs to occupy eight time slots.

[0216] As Figure 12 shown, the starting point of the candidate SSB group within the half-frame or frame starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. The corresponding index expression in the above formula increases the corresponding relative time offset, and the time offset should be at least not less than the number of symbols within one time slot. One offset method is as follows:

[0217] The first symbol of the candidate SSB has the following index: {1,8}+14×n+14×k, where n = 0,1,2,3 or n = 0,1,2,3,4,5,6,7, and k is an integer greater than 0.

[0218] IV: When considering that the SSB with SCS = 120KHz needs to reserve control or other channel time resources based on 60KHz, 120KHz, and 240KH, as Figure 13 shown, Figure 13 This is a schematic diagram of a 120KHz candidate SSB and an SSB pattern of 5 OFDM symbols provided by an embodiment of the present disclosure.

[0219] Described in units of two time slots:

[0220] The time domain resources corresponding to the first 2 symbols at the beginning of the first 120kHz time slot are reserved: allowed for downlink control channel transmission, where the downlink control channel of 60KHz has a maximum of 1 symbol, the downlink control channel of 120KHz has a maximum of 2 symbols, and the downlink control channel of 240KHz has a maximum of 4 symbols;

[0221] The time domain resources corresponding to the last 2 symbols at the end of the first 120kHz time slot are reserved: can be used for uplink control channel transmission of 120kHz or 240KHz (possibly including guard time);

[0222] The resource reservation for the second time slot is the same as that for the first time slot.

[0223] In Figure 13 the shown SSB pattern, coexisting with the 120 KHz non-SSB channel is optimal, and the 60 KHz and 240 KHz non-SSB channels are sub-optimal. The number of symbols of the control channel is limited at 60 KHz. At 240 KHz, it cannot be guaranteed that the uplink and downlink control channels transmit at least one time slot once.

[0224] When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the form of text and formulas. For a half-frame or frame with SSB, the index of the first symbol of the candidate SSB is determined as follows according to SSB SCS = 120 KHz, where index 0 corresponds to the first symbol of the first time slot in the half-frame or frame.

[0225] The first symbol of the candidate SSB has the following index: {2, 7} + 14×n, where n = 0, 1, … 30, 31, corresponding to the configuration of Lmax = 64. Since this is the time domain position of the candidate SSB, when a configuration with Lmax less than 64 is required, it can be arbitrarily selected from the time domain positions of 64 SSBs. Conventionally, the time domain position of the SSB in the front of the half-frame or frame can be adopted.

[0226] When Lmax = 64, the candidate SSBs within the period need to occupy thirty-two time slots. Since all candidate SSBs have a long duration within the half-frame, there is an interval of two time slots between adjacent 8 time slots containing candidate SSBs, avoiding long-term data blockage.

[0227] As Figure 13 shown, the starting point of the candidate SSB group within the half-frame or frame starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. The corresponding index expression in the above formula increases the corresponding relative time offset, and the time offset should be at least not less than the number of symbols within one time slot. One way of offset is as follows:

[0228] The first symbol of the candidate SSB has the following index: {2, 7} + 14×n + 14×k, where k is an integer greater than 0.

[0229] If it is necessary to coexist with the 60 KHz channel as much as possible, Figure 13 it can be further modified to Figure 14 , Figure 14 which is another schematic diagram of the 120 KHz candidate SSB and the SSB pattern of 5 OFDM symbols provided by the embodiment of the present disclosure.

[0230] Described in units of two time slots:

[0231] The time-domain resources corresponding to the first 4 symbols at the start of the first 120 kHz time slot are reserved: They are allowed to be used for downlink control channel transmission, where the downlink control channel with a bandwidth of 60 KHz has a maximum of 2 symbols, and the downlink control channel with a bandwidth of 120 KHz has a maximum of 4 symbols;

[0232] The time-domain resources corresponding to the last 4 symbols at the end of the second 120 kHz time slot are reserved: They can be used for uplink control channel transmission with a bandwidth of 60 kHz or 120 KHz (which may include guard time);

[0233] In Figure 14 In the SSB pattern shown, coexistence with the 60 KHz non-SSB channel is optimal, which can ensure that at least one time slot of the 60 KHz uplink and downlink control channel transmissions appears once and the number of symbols can reach 2. The 120 KHz non-SSB channel is sub-optimal and cannot ensure that at least one time slot of the uplink and downlink control channel transmissions appears once.

[0234] When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in a way of combining text and formula. For a half-frame or frame with SSB, the index of the first symbol of the candidate SSB is determined as follows according to the candidate SSB's SCS = 120 KHz, where index 0 corresponds to the first symbol of the first time slot in the half-frame or frame.

[0235] The first symbol of the candidate SSB has the following index: {4, 9, 14, 19} + 28×n, where n = 0, 1, … 14, 15, corresponding to the configuration with Lmax = 64. Since this is the time-domain position of the candidate SSB, when a configuration with Lmax less than 64 is required, it can be arbitrarily selected from the time-domain positions of 64 candidate SSBs. Conventionally, the time-domain position of the SSB closer to the front in the half-frame or frame can be adopted.

[0236] When Lmax = 64, the candidate SSBs within the period need to occupy thirty-two time slots. Since the duration of all candidate SSBs in the half-frame is relatively long, there is an interval of two time slots between adjacent 8 time slots containing SSBs, which avoids long-term data blockage.

[0237] As Figure 14 shown, the starting point of the candidate SSB group in the half-frame or frame starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. The corresponding index expression in the above formula increases the corresponding relative time offset, and the time offset should be at least not less than the number of symbols within one time slot. One way of offset is as follows:

[0238] The first symbol of the candidate SSB has the following index: {4, 9, 14, 19} + 28×n + 14×k, where k is an integer greater than 0.

[0239] V: When considering that the candidate SSB with SCS = 240KHz needs to reserve control or other channel time resources based on 120KHz and 240KH, such as Figure 15 shown, it is a schematic diagram of a 240KHz candidate SSB and an SSB pattern of 5 OFDM symbols provided by an embodiment of the present disclosure.

[0240] Described in units of two time slots:

[0241] The time domain resources corresponding to the first 4 symbols at the beginning of the first 240kHz time slot are reserved: allowed for downlink control channel transmission, where the maximum number of 60KHz downlink control channels is 1 symbol, the maximum number of 120KHz downlink control channels is 2 symbols, and the maximum number of 240KHz downlink control channels is 4 symbols;

[0242] The time domain resources corresponding to the last 4 symbols at the end of the second 240kHz time slot are reserved: available for 60kHz or 120KHz uplink control channel transmission (possibly including guard time);

[0243] In Figure 15 the shown SSB pattern, coexisting with the 120KHz non-SSB channel is optimal, which can ensure that the 120KHz uplink and downlink control channels are transmitted at least once per time slot and the number of symbols can reach 2. Coexisting with the 60KHz and 240KHz non-SSB channels is sub-optimal, which cannot ensure that the 240KHz uplink and downlink control channels are transmitted at least once per time slot, and the maximum number of 60KHz uplink and downlink control channel symbols is 1.

[0244] When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the form of text and formula. For a half-frame or frame with SSB, the index of the first symbol of the candidate SSB is determined as follows according to the SCS = 240KHz of the candidate SSB, where index 0 corresponds to the first symbol of the first time slot in the half-frame or frame.

[0245] The first symbol of the candidate SSB has the following index: {4, 9, 14, 19} + 28×n, where n = 0, 1,... 14, 15, corresponding to the configuration of Lmax = 64. Since this is the time domain position of the candidate SSB, when a configuration with Lmax less than 64 is required, it can be selected arbitrarily from the time domain positions of 64 candidate SSBs. Conventionally, the time domain position of the SSB closer to the front in the half-frame or frame can be adopted.

[0246] When Lmax = 64, the candidate SSBs within a period need to occupy thirty-two time slots. Since all SSBs have a relatively long duration within a half-frame, there is a gap of two time slots between every eight adjacent time slots containing SSBs, thus avoiding long-term data blockage. Note that since the period of the candidate SSB group is based on a half-frame or a frame, no SSB transmission is configured between this quarter-frame and the next half-frame header or frame header.

[0247] As Figure 15 shown, the starting point of the candidate SSB group within a half-frame or a frame starts from the first time slot. If the starting point of the candidate SSB does not start from the first time slot, the symbol index needs to be processed with a time offset at the time slot level. Accordingly, the index expression in the above formula is increased by the corresponding relative time offset, and the time offset should be at least not less than the number of symbols within a time slot. One way of offset is as follows:

[0248] The first symbol of the candidate SSB has the following index: {4, 9, 14, 19} + 28×n + 14×k, where k is an integer greater than 0.

[0249] If it is necessary to prioritize ensuring coexistence with the 240KHz non-SSB channel, as Figure 16 shown, Figure 16 this is another schematic diagram of the 240KHz candidate SSB and the SSB pattern of 5 OFDM symbols provided by the embodiments of the present disclosure.

[0250] Described in units of two time slots:

[0251] The time domain resources corresponding to the first 2 symbols at the beginning of the first 240kHz time slot are reserved: allowed for downlink control channel transmission, where the maximum number of symbols of the 120KHz downlink control channel is 1, and the maximum number of symbols of the 240KHz downlink control channel is 2;

[0252] The time domain resources corresponding to the last 2 symbols at the end of the first 240kHz time slot are reserved: can be used for the uplink control channel transmission of 60kHz or 120KHz (possibly including guard time);

[0253] The time domain position of the SSB in the second 240kHz time slot is the same as that in the first time slot.

[0254] In Figure 16 the shown SSB pattern, coexistence with the 240KHz non-SSB channel is better, which can ensure that the 240KHz uplink and downlink control channels are transmitted at least once per time slot and the number of symbols can reach 2. Coexistence with the 120KHz non-SSB channel is sub-optimal, and the maximum number of symbols of the 120KHz uplink and downlink control channels is 1.

[0255] When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the form of text and formula. For a half-frame or frame with SSBs, the index of the first symbol of the candidate SSB is determined as follows according to the SCS = 240 KHz of the candidate SSB, where index 0 corresponds to the first symbol of the first time slot in the half-frame or frame.

[0256] The first symbol of the candidate SSB has the following index: {2,7}+14×n, where n = 0,1,…30,31, corresponding to the configuration of Lmax = 64. Since this is the time domain position of the candidate SSB, when a configuration with Lmax less than 64 is required, it can be arbitrarily selected from the time domain positions of 64 candidate SSBs. Conventionally, the time domain position of the SSB closer to the front in the half-frame or frame can be adopted. The rule of selecting the candidate SSB supported by a smaller Lmax from the candidate SSBs supported by a larger Lmax also applies to other embodiments of the present invention.

[0257] When Lmax = 64, the candidate SSBs within a period need to occupy thirty-two time slots. Since all candidate SSBs have a relatively long duration within a half-frame, there is an interval of two time slots between adjacent 8 time slots containing SSBs, avoiding long-term data blockage. Note that since the period of the SSB group is a half-frame or a frame, there is no SSB transmission configured between this 1 / 4 frame and the next half-frame header or frame header.

[0258] As Figure 16 shown, the starting point of the candidate SSB group within a half-frame or a frame starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. The corresponding index expression in the above formula increases the corresponding relative time offset, and the time offset should be at least not less than the number of symbols within a time slot. One offset method is as follows:

[0259] The first symbol of the candidate SSB has the following index: {2,7}+14×n+14×k, where k is an integer greater than 0.

[0260] It should be understood that Example 2 shows that the number of symbols of the candidate SSB is 5. When the SCS of the candidate SSB is 15 KHz, 30 KHz, 60 KHz, 120 kHz, and 240 kHz, several time domain position schemes of the candidate SSB are considered when coexisting with non-SSB channels of 15 KHz, 30 KHz, 60 KHz, 120 kHz, and 240 kHz respectively:

[0261] I: The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 15 KHz, where index 0 corresponds to the first symbol of the first time slot in a half-frame or a frame. The first symbol of the candidate SSB has the following indices: {2,7} + 14×n, where n = 0,1 or n = 0,1,2,3. Or,

[0262] The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 15 KHz, where index 0 corresponds to the first symbol of the first time slot in a half-frame or a frame. The first symbol of the candidate SSB has the following indices: {1,8} + 14×n, where n = 0,1 or n = 0,1,2,3. Or,

[0263] II: The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 30 KHz, where index 0 corresponds to the first symbol of the first time slot in a half-frame or a frame. The first symbol of the candidate SSB has the following indices: {2,7} + 14×n, where n = 0,1 or n = 0,1,2,3. Or,

[0264] III: The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 60 KHz, where index 0 corresponds to the first symbol of the first time slot in a half-frame or a frame. The first symbol of the candidate SSB has the following indices: {2,7} + 14×n, where n = 0,1,2,3 or n = 0,1,2,3,4,5,6,7, or,

[0265] The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 60 KHz, where index 0 corresponds to the first symbol of the first time slot in a half-frame or a frame. The first symbol of the candidate SSB has the following indices: {1,8} + 14×n, where n = 0,1,2,3 or n = 0,1,2,3,4,5,6,7. Or,

[0266] IV: The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 120 KHz, where index 0 corresponds to the first symbol of the first time slot in a half-frame or a frame. The first symbol of the candidate SSB has the following indices: {2,7} + 14×n, where n = 0,1,…30,31. There are two time slots without SSB between every adjacent 8 time slots containing SSB. Or,

[0267] The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 120 KHz, where index 0 corresponds to the first symbol of the first time slot in a half-frame or a frame. The first symbol of the candidate SSB has the following indices: {4, 9, 14, 19} + 28×n, where n = 0, 1, … 14, 15. There are two time slot intervals without SSBs between every eight adjacent time slots containing SSBs. Or,

[0268] V: The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 240 KHz, where index 0 corresponds to the first symbol of the first time slot in a half-frame or a frame. The first symbol of the candidate SSB has the following indices: {4, 9, 14, 19} + 28×n, where n = 0, 1, … 14, 15. There are two time slot intervals without SSBs between every eight adjacent time slots containing SSBs. Or,

[0269] The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 240 KHz, where index 0 corresponds to the first symbol of the first time slot in a half-frame or a frame. The first symbol of the candidate SSB has the following indices: {2, 7} + 14×n, where n = 0, 1, … 30, 31. There are two time slot intervals without SSBs between every eight adjacent time slots containing SSBs.

[0270] In the above examples, if the starting point of the candidate SSB in a half-frame or a frame does not start from the first time slot, the symbol index is processed with a time offset at the time slot level. The time offset should be at least not less than the number of symbols in one time slot.

[0271] Combined with the description of Example 2 above, in some embodiments, when the SCS of the candidate SSB is 15 KHz and the number of OFDM symbols included in the candidate SSB is 5, the index of the first symbol of the candidate SSB is determined based on the following formula:

[0272] {1, 8} + 14×n, where n = 0, 1 or n = 0, 1, 2, 3; or,

[0273] {2, 7} + 14×n, where n = 0, 1 or n = 0, 1, 2, 3.

[0274] When the SCS of the candidate SSB is 30 KHz and the number of OFDM symbols included in the candidate SSB is 5, the index of the first symbol of the candidate SSB is determined based on the following formula:

[0275] {2, 7} + 14×n, where n = 0, 1, 2, 3 or n = 0, 1, 2, 3, 4, 5, 6, 7.

[0276] When the SCS of the candidate SSB is 60 KHz and the number of OFDM symbols included in the candidate SSB is 5, the index of the first symbol of the candidate SSB is determined based on the following formula:

[0277] {1,8}+14×n, where n = 0, 1, 2, 3 or n = 0, 1, 2, 3, 4, 5, 6, 7; or,

[0278] {2,7}+14×n, where n = 0, 1, 2, 3 or n = 0, 1, 2, 3, 4, 5, 6, 7.

[0279] When the SCS of the candidate SSB is 120 KHz or 240 KHz and the number of OFDM symbols included in the candidate SSB is 5, the index of the first symbol of the candidate SSB is determined based on the following formula:

[0280] {2,7}+14×n, where n = 0, 1, … 30, 31; or,

[0281] {4,9,14,19}+28×n, where n = 0, 1, … 14, 15.

[0282] It should be understood that in combination with the SSB pattern shown in the above Example 2, the accuracy of the terminal receiving the SSB can be improved.

[0283] Example 3. Candidate SSB with 6 OFDM symbols.

[0284] Similar to the 5-OFDM-symbol SSB, for the candidate SSB with 6 OFDM symbols, according to the parameters of different SCSs and the combination of Lmax and the constraint factors, the time-domain position of the candidate SSB, i.e., the SSB pattern, can be designed in the following multiple ways.

[0285] I: When considering that the candidate SSB with SCS = 15 KHz needs to reserve the control or other channel time resources based on 15 KHz and 30 KHz, as Figure 17 shown, it is a schematic diagram of a 15-KHz candidate SSB and an SSB pattern with 6 OFDM symbols provided by an embodiment of the present disclosure.

[0286] See Figure 17 , the time-domain resources corresponding to 1 symbol at the beginning of the first 15-kHz time slot are reserved: allowed to be used for downlink control channel transmission, where the downlink control channel of 15 KHz is at most 1 symbol, and the downlink control channel of 30 KHz is at most 2 symbols;

[0287] The time-domain resources corresponding to 1 symbol at the end of the first 15-kHz time slot are reserved: can be used for uplink control channel transmission of 15 KHz and 30 kHz, and may include guard time;

[0288] In Figure 17 In the SSB pattern shown, the uplink and downlink control channel transmissions at 15 kHz and 30 kHz can fully ensure that at least one time slot appears once, and it can ensure that the uplink and downlink control channel transmissions at 30 kHz appear at least twice in a time slot, which is suitable for coexistence with non-SSB channels at 30 kHz.

[0289] When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the form of text and formulas. For a half-frame or frame with SSB, the index of the first symbol of the candidate SSB is determined as follows according to the candidate SSB's SCS = 15 kHz, where index 0 corresponds to the first symbol of the first time slot in the half-frame or frame.

[0290] The first symbol of the candidate SSB has the following index: {1,7} + 14×n, where n = 0,1 or n = 0,1,2,3. When n = 0,1, it corresponds to the configuration of Lmax = 4, and at this time, the candidate SSB within the period needs to occupy two time slots; while n = 0,1,2,3 corresponds to the configuration of Lmax = 8, and at this time, the candidate SSB within the period needs to occupy four time slots.

[0291] As Figure 17 shown, the starting point of the candidate SSB group within a half-frame or frame starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. The corresponding index expression in the above formula increases the corresponding relative time offset, and the time offset should be at least not less than the number of symbols within one time slot. One way of offset is as follows:

[0292] The first symbol of the candidate SSB has the following index: {1,7} + 14×n + 14×k, where n = 0,1 or n = 0,1,2,3, and k is an integer greater than 0.

[0293] II: When considering that the candidate SSB with SCS = 30 kHz needs to reserve time resources for control or other channels based on 15 kHz and 30 kHz, as Figure 18 shown, it is a schematic diagram of the SSB pattern of a 30 kHz candidate SSB and 6 OFDM symbols provided by an embodiment of the present disclosure.

[0294] The time domain resources corresponding to 1 symbol at the beginning of the first 30 kHz time slot are reserved: it is allowed to be used for downlink control channel transmission, where the downlink control channel at 30 kHz is at most 1 symbol, and the downlink control channel at 60 kHz is at most 2 symbols;

[0295] The time domain resources corresponding to 1 symbol at the end of the first 30 kHz time slot are reserved: it can be used for uplink control channel transmission at 30 kHz and 60 kHz (possibly including guard time);

[0296] The resource reservation at the beginning and end of the second 30 kHz time slot is the same as that of the first time slot.

[0297] In Figure 18 the shown SSB pattern, coexistence with the 60 KHz non-SSB channel is preferred, which can ensure that the uplink and downlink control channel transmissions of 60 kHz can fully guarantee that at least one time slot appears once, and the number of control channel symbols can reach up to 2 at most, but the number of control channel symbols of 30 KHz itself is limited.

[0298] When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the form of text and formula. For a half-frame or frame with SSB, the index of the first symbol of the candidate SSB is determined as follows according to the candidate SSB's SCS = 30 KHz, where index 0 corresponds to the first symbol of the first time slot in the half-frame or frame.

[0299] The first symbol of the candidate SSB has the following index: {1,7} + 14×n, where n = 0,1 or n = 0,1,2,3, where n = 0,1 corresponds to the configuration of L max = 4, in which case the candidate SSB within the period needs to occupy two time slots; while n = 0,1,2,3 corresponds to the configuration of L max = 8, in which case the candidate SSB within the period needs to occupy four time slots.

[0300] As Figure 18 shown, the starting point of the candidate SSB group within the half-frame or frame starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. The corresponding index expression in the above formula increases the corresponding relative time offset, and the time offset should be at least not less than the number of symbols within one time slot. One offset method is as follows:

[0301] The first symbol of the candidate SSB has the following index: {1,7} + 14×n + 14×k, where n = 0,1 or n = 0,1,2,3, and k is an integer greater than 0.

[0302] If it is necessary to optimize the coexistence with 15 KHz and 30 KHz, the time domain position of the candidate SSB as Figure 19 shown can be adopted. Figure 19 This is another schematic diagram of the 30 KHz candidate SSB and the SSB pattern of 6 OFDM symbols provided by the embodiment of the present disclosure.

[0303] The time-domain resources corresponding to the first 2 symbols at the start of the first 30 kHz time slot are reserved: They are allowed to be used for downlink control channel transmission, where the downlink control channel with a bandwidth of 15 KHz can occupy at most 1 symbol, the downlink control channel with a bandwidth of 30 KHz can occupy at most 2 symbols, and the downlink control channel with a bandwidth of 60 KHz can occupy at most 4 symbols;

[0304] The time-domain resources corresponding to the last 2 symbols at the end of the second 30 kHz time slot are reserved: They can be used for uplink control channel transmission of 15 KHz, 30 KHz, and 60 KHz (which may include guard time);

[0305] In Figure 19 the shown SSB pattern, coexistence with non-SSB channels of 15 KHz and 30 KHz is relatively optimal.

[0306] When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the form of text and formulas. For a half-frame or a frame with SSB, the index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 30 KHz, where index 0 corresponds to the first symbol of the first time slot in the half-frame or the frame.

[0307] The first symbol of the candidate SSB has the following index: {2, 8, 14, 20} + 28×n, where n = 0 or n = 0, 1, where n = 0 corresponds to the configuration with Lmax = 4, and in this case, the candidate SSB within the period needs to occupy two time slots; while n = 0, 1 corresponds to the configuration with Lmax = 8, and in this case, the candidate SSB within the period needs to occupy four time slots.

[0308] As Figure 19 shown, the starting point of the candidate SSB group within the half-frame or the frame starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. The corresponding index expression in the above formula increases the corresponding relative time offset, and the time offset should be at least not less than the number of symbols within one time slot. One way of offset is as follows:

[0309] The first symbol of the candidate SSB has the following index: {2, 8, 14, 20} + 28×n + 14×k, where k is an integer greater than 0.

[0310] III: When considering that candidate SSBs with SCS = 60 KHz need to reserve time resources for control or other channels based on 30 KHz, 60 KHz, and 120 KHz, as Figure 20 shown, it is a schematic diagram of an SSB pattern of a 60 KHz candidate SSB and 6 OFDM symbols provided by an embodiment of the present disclosure.

[0311] The time-domain resources corresponding to the first symbol at the beginning of the first 60 kHz time slot are reserved: It is allowed to be used for downlink control channel transmission, where the downlink control channel of 60 KHz is at most 1 symbol, and the downlink control channel of 120 KHz is at most 2 symbols;

[0312] The time-domain resources corresponding to the last 1 symbol at the end of the first 60 kHz time slot are reserved: It can be used for uplink control channel transmission of 60 kHz or 120 KHz (possibly including guard time);

[0313] The resource reservation at the beginning and end of the second, third, and fourth 60 kHz time slots is the same as that of the first time slot.

[0314] In Figure 20 the shown SSB pattern, coexistence with the 60 KHz non-SSB channel is optimal. It can coexist partially with 120 KHz.

[0315] When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the way of text and formula. For a half-frame or frame with SSB, the index of the first symbol of the candidate SSB is determined as follows according to the candidate SSB's SCS = 60 KHz, where index 0 corresponds to the first symbol of the first time slot in the half-frame or frame.

[0316] The first symbol of the candidate SSB has the following index: {1,7} + 14×n, where n = 0,1,2,3 or n = 0,1,2,3,4,5,6,7, where n = 0,1 corresponds to the configuration of Lmax = 8, and at this time the candidate SSB within the period needs to occupy four time slots; while n = 0,1,2,3,4,5,6,7 corresponds to the configuration of Lmax = 16, and at this time the candidate SSB within the period needs to occupy eight time slots.

[0317] As Figure 20 shown, the starting point of the candidate SSB group within the half-frame or frame starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. The corresponding index expression in the above formula increases the corresponding relative time offset, and the time offset should be at least not less than the number of symbols within one time slot. One offset method is as follows:

[0318] The first symbol of the candidate SSB has the following index: {1,7} + 14×n + 14×k, where n = 0,1,2,3 or n = 0,1,2,3,4,5,6,7, and k is an integer greater than 0.

[0319] If better coexistence with 30 KHz is required, it can be modified to the way shown in Figure 21 Figure 21 ​Another schematic diagram of a 60KHz candidate SSB and an SSB pattern of 6 OFDM symbols provided by the embodiments of the present disclosure.

[0320] See Figure 21 , the time-domain resources corresponding to the first 2 symbols at the beginning of the first 60kHz time slot are reserved: allowed for downlink control channel transmission, where the maximum number of 30KHz downlink control channels is 1 symbol, the maximum number of 60KHz downlink control channels is 2 symbols, and the maximum number of 120KHz downlink control channels is 2 symbols;

[0321] The time-domain resources corresponding to the last 2 symbols at the end of the second 60kHz time slot are reserved: available for uplink control channel transmission of 30KHz, 60kHz or 120KHz (may include guard time);

[0322] The third and fourth 60kHz time slots repeat the positions of the first and second time slots.

[0323] In this pattern, it satisfies coexistence with non-SSB channels of 30KHz. It can coexist partially with 60KHz and 120KHz.

[0324] When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the form of text and formulas. For a half-frame or frame with SSB, the index of the first symbol of the candidate SSB is determined as follows according to the candidate SSB's SCS = 60KHz, where index 0 corresponds to the first symbol of the first time slot in the half-frame or frame.

[0325] The first symbol of the candidate SSB has the following index: {2, 8, 14, 20} + 28×n, where n = 0, 1 or n = 0, 1, 2, 3, where n = 0, 1 corresponds to the configuration of Lmax = 8, and at this time, the candidate SSB within the period needs to occupy four time slots; while n = 0, 1, 2, 3 corresponds to the configuration of Lmax = 16, and at this time, the candidate SSB within the period needs to occupy eight time slots.

[0326] As Figure 21 shown, the starting point of the candidate SSB group within the half-frame or frame starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. The corresponding index expression in the above formula increases the corresponding relative time offset, and the time offset should be at least not less than the number of symbols within one time slot. One offset method is as follows:

[0327] The first symbol of the candidate SSB has the following index: {2, 8, 14, 20} + 28×n + 14×k, where k is an integer greater than 0.

[0328] IV: When considering that control or other channel time resources based on 60KHz, 120KHz, and 240KHz need to be reserved for candidate SSBs with SCS = 120KHz, as Figure 22 shown, it is a schematic diagram of a 120KHz candidate SSB and an SSB pattern of 6 OFDM symbols provided by an embodiment of the present disclosure.

[0329] Described in units of two time slots:

[0330] The time domain resources corresponding to the first symbol at the beginning of the first 120kHz time slot are reserved: allowed for downlink control channel transmission, where the downlink control channel of 120KHz is at most 1 symbol, and the downlink control channel of 240KHz is at most 2 symbols;

[0331] The time domain resources corresponding to the last 1 symbol at the end of the first 120kHz time slot are reserved: available for uplink control channel transmission of 120kHz or 240KHz (possibly including guard time);

[0332] The resource reservation of the second time slot is the same as that of the first time slot.

[0333] In Figure 22 the shown SSB pattern, coexistence with the 120KHz non - SSB channel is optimal, and coexistence with the 240KHz non - SSB channel is sub - optimal. At 240KHz, it is impossible to ensure that the uplink and downlink control channels transmit at least once per time slot.

[0334] When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the form of text and formulas. For a half - frame or frame with SSBs, the index of the first symbol of the candidate SSB is determined as follows according to the SCS = 120KHz of the candidate SSB, where index 0 corresponds to the first symbol of the first time slot in the half - frame or frame.

[0335] The first symbol of the candidate SSB has the following index: {1, 7}+14×n, where n = 0, 1, … 30, 31, corresponding to the configuration of Lmax = 64. Since this is the time domain position of the candidate SSB, when a configuration with Lmax less than 64 is required, it can be selected arbitrarily from the time domain positions of 64 SSBs. Conventionally, the time domain position of the SSB in the front of the half - frame or frame can be adopted.

[0336] When Lmax = 64, the candidate SSBs within a period need to occupy thirty - two time slots. Since all candidate SSBs have a relatively long duration within a half - frame, there is an interval of two time slots between adjacent 8 time slots containing SSBs, avoiding long - term data blockage.

[0337] As Figure 22As shown, the starting point of the semi-frame or intra-frame candidate SSB group starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. The corresponding index expression in the above formula is increased by the corresponding relative time offset, and the time offset should be at least not less than the number of symbols in one time slot. One way of offset is as follows:

[0338] The first symbol of the candidate SSB has the following index: {1,7}+14×n+14×k, where k is an integer greater than 0.

[0339] If it is necessary to coexist with a 60KHz channel as much as possible, then Figure 23 is a solution. Figure 23 FIG. is a schematic diagram of another 120KHz candidate SSB and an SSB pattern of 6 OFDM symbols provided by an embodiment of the present disclosure.

[0340] Described in units of two time slots:

[0341] Refer to Figure 23 , the time domain resources corresponding to the first 2 symbols at the beginning of the first 120kHz time slot are reserved: allowed for downlink control channel transmission, where the maximum number of 60KHz downlink control channels is 1 symbol, and the maximum number of 120KHz downlink control channels is 2 symbols;

[0342] The time domain resources corresponding to the last 2 symbols at the end of the second 120kHz time slot are reserved: available for 60kHz or 120KHz uplink control channel transmission (possibly including guard time);

[0343] In Figure 23 In the SSB pattern shown, coexistence with a 60KHz non-SSB channel is optimal, which can ensure that the 60KHz uplink and downlink control channels are transmitted at least once per time slot and the number of symbols can reach 1. Coexistence with a 120KHz non-SSB channel is sub-optimal and cannot ensure that the uplink and downlink control channels are transmitted at least once per time slot.

[0344] When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the form of text and formula. For a semi-frame or frame with an SSB, the index of the first symbol of the candidate SSB is determined as follows according to the candidate SSB's SCS = 120KHz, where index 0 corresponds to the first symbol of the first time slot in the semi-frame or frame.

[0345] The first symbol of the candidate SSB has the following indices: {2, 8, 14, 20} + 28×n, where n = 0, 1, …, 14, 15, corresponding to the configuration of Lmax = 64. Since this is the time domain position of the candidate SSB, when a configuration with Lmax less than 64 is required, it can be arbitrarily selected from the time domain positions of the 64 candidate SSBs. Conventionally, the time domain position of the SSB in the first half-frame or frame can be used.

[0346] When Lmax = 64, the candidate SSBs within a period need to occupy thirty-two time slots. Since all candidate SSBs have a relatively long duration within a half-frame, there is an interval of two time slots between every eight adjacent time slots containing SSBs, avoiding long-term data blockage.

[0347] As Figure 23 shown, the starting point of the candidate SSB group in the half-frame or frame starts from the first time slot. If the starting point of the candidate SSB does not start from the first time slot, the symbol index needs to be processed with a time offset at the time slot level. The corresponding index expression in the above formula is increased by the corresponding relative time offset, and the time offset should be at least not less than the number of symbols within a time slot. One way of offset is as follows:

[0348] The first symbol of the candidate SSB has the following indices: {2, 8, 14, 20} + 28×n + 14×k, where k is an integer greater than 0.

[0349] V: When considering that the candidate SSB with SCS = 240KHz needs to reserve time resources for control or other channels based on 120KHz and 240KHz, as Figure 24 shown, it is a schematic diagram of the SSB pattern of a 240KHz candidate SSB and 6 OFDM symbols provided for the disclosed embodiment.

[0350] Described in units of two time slots:

[0351] As Figure 24 shown, the time domain resources corresponding to the first 2 symbols at the beginning of the first 240kHz time slot are reserved: allowed for downlink control channel transmission, where the downlink control channel of 120KHz has at most 1 symbol, and the downlink control channel of 240KHz has at most 2 symbols;

[0352] The time domain resources corresponding to the last 2 symbols at the end of the second 240kHz time slot are reserved: can be used for uplink control channel transmission of 120kHz or 240KHz (possibly including guard time);

[0353] In Figure 24In the shown SSB pattern, coexistence with a 120 KHz non-SSB channel is optimal, which can ensure that at least one time slot of the 120 KHz uplink and downlink control channel transmissions appears once and the number of symbols can reach 1. Coexistence with a 240 KHz non-SSB channel is sub-optimal and cannot ensure that at least one time slot of the 240 KHz uplink and downlink control channel transmissions appears once.

[0354] When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the form of text and formula. For a half-frame or frame with SSB, the index of the first symbol of the candidate SSB is determined as follows according to the SCS = 240 KHz of the candidate SSB, where index 0 corresponds to the first symbol of the first time slot in the half-frame or frame.

[0355] The first symbol of the candidate SSB has the following index: {2, 8, 14, 20} + 28×n, where n = 0, 1, … 14, 15, corresponding to the configuration of Lmax = 64. Since this is the time domain position of the candidate SSB, when a configuration with Lmax less than 64 is required, it can be arbitrarily selected from the time domain positions of 64 candidate SSBs. Conventionally, the time domain position of the SSB earlier in the half-frame or frame can be adopted.

[0356] When Lmax = 64, the candidate SSBs within a period need to occupy thirty-two time slots. Since all candidate SSBs have a long duration within a half-frame and there is an interval of two time slots between adjacent 8 time slots containing SSBs, it avoids long-term data blockage. Note that since the period of the SSB group is a half-frame or a frame, there is no SSB transmission configured between this 1 / 4 frame and the next half-frame header or frame header.

[0357] As Figure 24 shown, the starting point of the candidate SSB group within a half-frame or frame starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. The corresponding index expression in the above formula increases the corresponding relative time offset, and the time offset should be at least not less than the number of symbols within one time slot. One way of offset is as follows:

[0358] The first symbol of the candidate SSB has the following index: {2, 8, 14, 20} + 28×n + 14×k, where k is an integer greater than 0.

[0359] If it is necessary to give priority to ensuring coexistence with a non-SSB channel with SCS = 240 KHz, it can be considered Figure 25 shown, Figure 25 Another schematic diagram of the 240 KHz candidate SSB and the SSB pattern of 6 OFDM symbols provided for the disclosed embodiment.

[0360] SeeFigure 25 , described in units of two time slots:

[0361] The time-domain resources corresponding to the first symbol at the beginning of the first 240 kHz time slot are reserved: allowed for downlink control channel transmission, where the downlink control channel of 240 KHz is at most 1 symbol;

[0362] The time-domain resources corresponding to the last symbol at the end of the first 240 kHz time slot are reserved: available for uplink control channel transmission of 240 KHz (may include guard time);

[0363] The time-domain position of the SSB in the second 240 kHz time slot is the same as that in the first time slot.

[0364] In Figure 25 In the shown SSB pattern, coexistence with the non-SSB channel of 240 KHz is preferred, which can ensure that the uplink and downlink control channels of 240 KHz appear at least once per time slot and the number of symbols can reach 1.

[0365] When the starting point of the candidate SSB group starts from symbol index 0 under normal circumstances, its SSB pattern can be expressed in the form of text and formula. For a half-frame or frame with SSB, the index of the first symbol of the candidate SSB is determined as follows according to the candidate SSB's SCS = 240 KHz, where index 0 corresponds to the first symbol of the first time slot in the half-frame or frame.

[0366] The first symbol of the candidate SSB has the following index: {1, 7} + 14×n, where n = 0, 1, … 30, 31, corresponding to the configuration of Lmax = 64. Since this is the time-domain position of the candidate SSB, when a configuration with Lmax less than 64 is required, it can be selected arbitrarily from the time-domain positions of 64 candidate SSBs. Conventionally, the time-domain position of the SSB closer to the front in the half-frame or frame can be adopted. The rule of selecting the candidate SSB with a smaller Lmax from the candidate SSBs supported by a larger Lmax also applies to other embodiments of the present invention.

[0367] When Lmax = 64, the candidate SSBs within the period need to occupy thirty-two time slots. Since all candidate SSBs have a relatively long duration within the half-frame, there is an interval of two time slots between adjacent 8 time slots containing SSBs, avoiding long-term data blockage. Note that since the period of the SSB group is a half-frame or a frame, there is no SSB transmission configured between this 1 / 4 frame and the next half-frame header or frame header.

[0368] As Figure 25As shown, the starting point of the semi-frame or intra-frame candidate SSB group starts from the first time slot. If the starting point of the candidate SSB starts from a non-first time slot, the symbol index needs to be processed with a time offset at the time slot level. Accordingly, the index expression in the above formula is increased by the corresponding relative time offset, and the time offset should be at least not less than the number of symbols in one time slot. One offset method is as follows:

[0369] The first symbol of the candidate SSB has the following index: {1,7}+14×n+14×k, where k is an integer greater than 0.

[0370] Example 3 shows that the number of symbols of the candidate SSB is 6. When the SCS of the candidate SSB is 15KHz, 30KHz, 60KHz, 120kHz, and 240kHz, several time-domain position schemes of the SSB are considered when coexisting with non-SSB channels of 15KHz, 30KHz, 60KHz, 120kHz, and 240kHz respectively:

[0371] I: The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 15KHz, where index 0 corresponds to the first symbol of the first time slot in the semi-frame or frame. The first symbol of the candidate SSB has the following index: {1,7}+14×n, where n = 0,1 or n = 0,1,2,3. Or,

[0372] II: The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 30KHz, where index 0 corresponds to the first symbol of the first time slot in the semi-frame or frame. The first symbol of the candidate SSB has the following index: {1,7}+14×n, where n = 0,1 or n = 0,1,2,3. Or,

[0373] The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 30KHz, where index 0 corresponds to the first symbol of the first time slot in the semi-frame or frame. The first symbol of the candidate SSB has the following index: {2,8,14,20}+28×n, where n = 0 or n = 0,1. Or,

[0374] III: The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 60KHz, where index 0 corresponds to the first symbol of the first time slot in the semi-frame or frame. The first symbol of the candidate SSB has the following index: {1,7}+14×n, where n = 0,1,2,3 or n = 0,1,2,3,4,5,6,7, or,

[0375] The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 60 KHz, where index 0 corresponds to the first symbol of the first time slot in a half-frame or a frame. The first symbol of the candidate SSB has the following indices: {2, 8, 14, 20} + 28 × n, where n = 0, 1 or n = 0, 1, 2, 3. Or,

[0376] IV: The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 120 KHz, where index 0 corresponds to the first symbol of the first time slot in a half-frame or a frame. The first symbol of the candidate SSB has the following indices: {1, 7} + 14 × n, where n = 0, 1, … 30, 31. There are two time slot intervals without SSBs between every eight adjacent time slots containing SSBs. Or,

[0377] The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 120 KHz, where index 0 corresponds to the first symbol of the first time slot in a half-frame or a frame. The first symbol of the candidate SSB has the following indices: {2, 8, 14, 20} + 28 × n, where n = 0, 1, … 14, 15. There are two time slot intervals without SSBs between every eight adjacent time slots containing SSBs.

[0378] V: The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 240 KHz, where index 0 corresponds to the first symbol of the first time slot in a half-frame or a frame. The first symbol of the candidate SSB has the following indices: {2, 8, 14, 20} + 28 × n, where n = 0, 1, … 14, 15. There are two time slot intervals without SSBs between every eight adjacent time slots containing SSBs. Or,

[0379] The index of the first symbol of the candidate SSB is determined as follows according to the SCS of the candidate SSB = 240 KHz, where index 0 corresponds to the first symbol of the first time slot in a half-frame or a frame. The first symbol of the candidate SSB has the following indices: {1, 7} + 14 × n, where n = 0, 1, … 30, 31. There are two time slot intervals without SSBs between every eight adjacent time slots containing SSBs.

[0380] In Example 3, if the starting point of the SSB within a half-frame or a frame does not start from the first time slot, the symbol index is processed with a time offset at the time slot granularity level. The time offset should be at least not less than the number of symbols within one time slot.

[0381] Combined with the above description of Example 3, in some embodiments, when the SCS of the candidate SSB is 15 KHz and the number of OFDM symbols included in the candidate SSB is 6, the index of the first symbol of the candidate SSB is determined based on the following formula:

[0382] {1,7} + 14×n, where n = 0, 1 or n = 0, 1, 2, 3.

[0383] When the SCS of the candidate SSB is 30 KHz and the number of OFDM symbols included in the candidate SSB is 6, the index of the first symbol of the candidate SSB is determined based on the following formula:

[0384] {1,7} + 14×n, where n = 0, 1 or n = 0, 1, 2, 3; or,

[0385] {2,8,14,20} + 28×n, where n = 0 or n = 0, 1.

[0386] When the SCS of the candidate SSB is 60 KHz and the number of OFDM symbols included in the candidate SSB is 6, the index of the first symbol of the candidate SSB is determined based on the following formula:

[0387] {1,7} + 14×n, where n = 0, 1, 2, 3 or n = 0, 1, 2, 3, 4, 5, 6, 7; or,

[0388] {2,8,14,20} + 28×n, where n = 0 or n = 0, 1, 2, 3.

[0389] When the SCS of the candidate SSB is 120 KHz or 240 KHz and the number of OFDM symbols included in the candidate SSB is 6, the index of the first symbol of the candidate SSB is determined based on the following formula:

[0390] {1,7} + 14×n, where n = 0, 1, … 30, 31; or,

[0391] {2,8,14,20} + 28×n, where n = 0, 1, … 14, 15.

[0392] It should be understood that, combined with the SSB pattern shown in Example 3 above, it can provide large bandwidth support for future mobile communication systems and improve the accuracy of the terminal receiving SSB.

[0393] Example 4. The SSB pattern of the candidate SSB with 7 OFDM symbols.

[0394] The candidate SSB pattern with 7 OFDM symbols can be designed in multiple ways for the time domain position of the candidate SSB, i.e., the SSB pattern, according to the parameters of different SCSs and the combination of Lmax and the constraint factors.

[0395] Since the number of symbols in one time slot is 14 symbols, at most two candidate SSBs can be configured within one time slot, and there is no remaining time domain resource available for other channels. Regardless of the SCS, such as 15KHz, 30KHz, 60KHz, 120KHz, or 240KHz, the time domain positions of the SSBs within the time slot are the same. Taking SCS = 15KHz as an example, as Figure 26 shown, it is a schematic diagram of a 15KHz candidate SSB and an SSB pattern of 7 OFDM symbols provided by an embodiment of the present disclosure.

[0396] Refer to Figure 26 , two candidate SSBs are configured within one time slot, and the indexes of the starting symbols (the first symbol) of the candidate SSBs are 0 and 7 respectively. The SSB pattern within the time slot can be repeated in multiple time slots. When it is necessary to support Lmax = 4, the SSB pattern is repeated in two time slots. When supporting Lmax = 8, the SSB pattern is repeated in four time slots, and so on for more Lmax values.

[0397] Alternatively, if one candidate SSB is configured within one time slot, the first symbol of the candidate SSB can be any one of the symbols {0, …, 7}. In some embodiments, it can start from symbol 2 or 4.

[0398] For the configurations of the candidate SSB when SCS = 30KHz, 60KHz, 120kHz, and 240kHz, reference can be made to the description for SCS = 15KHz, which will not be elaborated here.

[0399] Example 4 summarizes the case where the number of symbols of the SSB is 7, and the time domain position schemes of the SSB when the SCS of the SSB is 15KHz, 30KHz, 60KHz, 120kHz, and 240kHz:

[0400] Two candidate SSBs are configured within one time slot, and the indexes of the starting symbols of the candidate SSBs are 0 and 7 respectively. The SSB pattern within the time slot can be repeated in multiple time slots. Or,

[0401] One candidate SSB is configured within one time slot, and the starting point of the candidate SSB can be any one of the symbols {0, …, 7}. In some embodiments, it can start from symbol 2 or 4.

[0402] Combined with the above description of Example 4, in some embodiments, when the SCS of the candidate SSB is any one of 15KHz, 30KHz, 60KHz, 120kHz, and 240kHz, and the number of OFDM symbols included in the candidate SSB is 7, the index of the first symbol of the candidate SSB includes any one of the following:

[0403] When two candidate SSBs are configured in one time slot, the indices of the first symbols of the two candidate SSBs are 0 and 7 respectively; or,

[0404] When one candidate SSB is configured in one time slot, the index of the first symbol of the candidate SSB is any one of {0, …, 7}. As an example, the index of the first symbol of the candidate SSB is 2 or 4.

[0405] In some embodiments, when two candidate SSBs are configured in one time slot, the SSB pattern within the time slot is repeated among multiple time slots.

[0406] It should be understood that the SSB pattern shown in Example 4 can provide large bandwidth support for future mobile communication systems and improve the accuracy of the terminal receiving SSBs.

[0407] SSB patterns of candidate SSBs with 5, 8 - 14 OFDM symbols.

[0408] For the SSB patterns of 8 - 14 OFDM symbols, according to the parameters of different SCSs and the combination of Lmax and constraint factors, the following multiple designs can be made for the time domain position of the candidate SSB, that is, the SSB pattern.

[0409] Since the number of symbols in one time slot is 14 symbols, under the constraint that the SSB does not span time slots, at most 1 SSB can be configured within 1 time slot, regardless of various SCSs such as 15KHz, 30KHz, 60KHz, 120KHz, or 240KHz. If it is assumed that the number of symbols in the SSB is x, the starting point of the SSB can be any one of the symbols {0, …, 14 - x}. As an example, it can start from symbol 2 or 4. Taking 15KHz and x = 8 as an example, as Figure 27 shown, it is a schematic diagram of a 15KHz candidate SSB and the SSB pattern of x OFDM symbols provided by an embodiment of the present disclosure, with the starting point being symbol 2.

[0410] Figure 27 In the case where Lmax = 4 is supported, the time domain position of the candidate SSB in the first time slot is repeated four times in four time slots, but the starting point indices of the symbols in the second, third, and fourth time slots cannot be different from symbol 2 in the first time slot. The time slot group composed of multiple time slots can be repeated again to increase Lmax.

[0411] Alternatively, configure the candidate SSBs to span time slots and be connected end to end, and the symbols of the candidate SSBs are continuously distributed, which can improve the utilization rate of the time resources of the candidate SSBs. Considering the periodicity requirement of the pattern, time slot groups can be defined. Within the y time slots in the time slot group, the candidate SSBs span time slots, and within the period, the time domain positions of the SSBs in the SSB pattern repeat those of the SSBs in the time slot group (y time slots). Taking 30KHz, x = 8, y = 2, and the starting point as symbol 2 as an example, as Figure 28 shown, it is a schematic diagram of an SSB pattern in which the 30KHz candidate SSBs span time slots and are connected end to end provided by an embodiment of the present disclosure.

[0412] See Figure 28 , within 1ms, 3 candidate SSBs are connected end to end in 2 time slots, and the second candidate SSB spans two time slots.

[0413] Alternatively, configure the candidate SSBs to span time slots and be connected end to end, but the symbols of the candidate SSBs are allowed to be discontinuously distributed at some symbol positions, and these symbol positions can be z symbols at the head or tail of the time slot, forming a symbol distribution hole of the candidate SSBs. The purpose is to allow the z symbols at the head or tail of the time slot to transmit control channels and other data channels to avoid the long-term blocking of these channels. Taking 30KHz, x = 8, y = 2, z = 2, and the starting point as symbol 2 as an example, as Figure 29 shown, it is a schematic diagram of an SSB pattern in which the 30KHz candidate SSBs span time slots and are connected end to end with discontinuous symbol distribution provided by an embodiment of the present disclosure.

[0414] Example 5 shows the time domain position schemes of the SSBs with the number of symbols of the SSBs being 8 - 14:

[0415] I: Configure 1 candidate SSB in one time slot, and the starting point of the candidate SSB can be any one of the symbols {0, …, 14 - x}. As an example, it can start from symbol 2 or 4. The SSB pattern within the time slot can be repeated in multiple time slots.

[0416] II: Configure 1 candidate SSB in any one of the time slots within a time slot group composed of multiple time slots. The starting point of the candidate SSB in any one of the time slots can be any one of the symbols {0, …, 14 - x}. As an example, the starting point is symbol 2 or 4. The SSB pattern within the time slot group can be repeated in other time slot groups.

[0417] III: In a time slot group composed of multiple time slots, it is possible to configure the candidate SSBs to span time slots and multiple candidate SSBs are connected end to end, and the symbols of the candidate SSBs are continuously distributed. The time domain positions of the candidate SSBs within the time slot group can be repeated in other time slot groups. Or,

[0418] IV: In a slot group composed of multiple time slots, configurable candidate SSBs span time slots and are connected end to end, but the symbols of the candidate SSBs are not continuously distributed. The gaps where the candidate SSBs are not continuously distributed can be one or more symbols at the head or tail of the time slot. The time domain positions of the candidate SSBs within the slot group can be repeated in other slot groups.

[0419] Combined with the description of Example 5, in some embodiments, when the SCS of the candidate SSB is any one of 15KHz, 30KHz, 60KHz, 120kHz, and 240kHz, and the number of OFDM symbols included in the candidate SSB is greater than or equal to 8 and less than or equal to 14, the index of the first symbol of the candidate SSB includes any one of the following:

[0420] When one candidate SSB is configured in one time slot, the index of the first symbol of the candidate SSB is any one of {0, …, 14 - x}, where x is the number of OFDM symbols included in the candidate SSB. As an example, the index of the first symbol of the candidate SSB is 2 or 4; or,

[0421] When a candidate SSB is configured in any time slot within the slot group, the index of the first symbol of the candidate SSB is any one of {0, …, 14 - x}; as an example, the index of the first symbol of the candidate SSB is 2 or 4.

[0422] In some embodiments, when one candidate SSB is configured in one time slot, the SSB pattern within the time slot is repeated in multiple time slots; or,

[0423] When a candidate SSB is configured in any time slot within the slot group, the SSB pattern within the slot group is repeated in other slot groups.

[0424] In some embodiments, when multiple candidate SSBs are configured in the slot group, the multiple candidate SSBs are allowed to be connected across time slots and are continuous in the time domain.

[0425] Among them, the symbols of each candidate SSB among the multiple candidate SSBs are continuously distributed or not continuously distributed. The gaps where the symbols of the candidate SSBs are not continuously distributed can be one or more symbols at the head or tail of the time slot.

[0426] In some embodiments, the time domain positions of the candidate SSBs in the slot group are repeated in other slot groups.

[0427] As can be seen from the description in the above Example 1, when the first symbol of the candidate SSB does not fall in the first time slot of a half-frame or a frame, the index of the first symbol of the candidate SSB is obtained based on the time offset. In this example, when the first symbol of the candidate SSB does not fall in the first time slot of a half-frame or a frame, after obtaining the initial index of the first symbol of the candidate SSB based on Example 5, the index of the first symbol of the candidate SSB is obtained based on the initial index of the first symbol of the candidate SSB and the time offset.

[0428] It should be understood that the SSB pattern shown in Example 5 can provide large bandwidth support for future mobile communication systems and improve the accuracy of terminals receiving SSBs.

[0429] Example 6: SSB pattern exceeding a half-frame.

[0430] In the foregoing examples, the time-domain position configuration of candidate SSBs with a maximum Lmax of up to 8 in the mid-low frequency band and up to 64 in the high frequency band within one half-frame has been supported. However, due to the further enhancement of transmission beam or spatial filtering capabilities, there is also a strong demand for the time-domain position configuration of candidate SSBs with a maximum Lmax of up to 16 or even 32 in the mid-low frequency band and up to 128 or even 256 in the high frequency band. Driven by this demand, the SSB pattern within a period needs to break through the half-frame limit and realize the SSB pattern design within a full frame.

[0431] Take Figure 8 as an example. The original 15 KHz SSB pattern supports a maximum Lmax of up to 8. After copying the pattern within a half-frame and connecting the head and tail of the time slots with SSB patterns within the half-frame, it can support a maximum Lmax of up to 16. As shown in Figure 30 , it is a schematic diagram of a 15 KHz SSB pattern provided by an embodiment of the present disclosure that extends to support an SSB pattern with Lmax = 16.

[0432] The copied half-frame SSB pattern can also start pasting from the next half-frame. As shown in Figure 31 , it is another schematic diagram of a 15 KHz SSB pattern provided by an embodiment of the present disclosure that extends to support an SSB pattern with Lmax = 16.

[0433] In this way, a time-domain position scheme of completely equivalent candidate SSBs can be realized within a half-frame to avoid the situation where long-time data and control channels are blocked.

[0434] Example 6 shows a scheme for extending the time-domain position of candidate SSBs to support a higher Lmax:

[0435] I: Copy the SSB pattern supporting a low Lmax and connect the head and tail of the time slots with the original SSB pattern; or, II: Copy the SSB pattern configuration supporting a low Lmax to the next half-frame.

[0436] Combined with the SSB pattern shown in Example 6, in some embodiments, the first node copies the SSB pattern to obtain a copied SSB pattern;

[0437] Connect the copied SSB pattern after the time slot of the SSB pattern before copying; or,

[0438] Configure the copied SSB pattern into the next half-frame.

[0439] As an example, when the time-domain resources occupied by the SSB pattern are greater than half a frame, the first node copies the SSB pattern to obtain a copied SSB pattern.

[0440] In some embodiments, after the first node determines the index of the first symbol of the candidate SSB based on the SSB pattern, it can determine the time-domain position of the candidate SSB based on the index of the first symbol of the candidate SSB. For the description of how the first node determines the time-domain position of the candidate SSB based on the index of the first symbol of the candidate SSB, reference can be made to the description in the related art and will not be elaborated here.

[0441] S102. Receive the SSB based on the time-domain position of the candidate SSB.

[0442] When determining the time-domain position of the candidate SSB, the first node can receive the SSB or detect the SSB based on the time-domain position of the candidate SSB.

[0443] Based on Figure 4 In the embodiments shown, compared with the related art where SCS supports 15KHz, 30KHz, 120KHz, and 240KHz, 60KHz is not defined, and the number of OFDM symbols included in the SSB in the related art is 4, the present disclosure provides an SSB pattern for candidate SBBs that supports SCS of 60KHz and has more than 4 symbols, thereby enabling large-bandwidth support for future mobile communication systems and improving the accuracy of receiving SSBs. In some embodiments, the configuration of the time-domain position of the candidate SSB provided by the embodiments of the present disclosure can provide more system information bits to improve the performance of future mobile communication systems.

[0444] The above embodiments illustrate a synchronization signal transmission method provided by the embodiments of the present disclosure from the perspective of the first node. In some embodiments, as Figure 32 shown, the embodiments of the present disclosure also provide another synchronization signal transmission method, which is applied to the second node, and the method may include the following steps:

[0445] S201. Determine the time-domain position of the candidate SSB based on the SSB pattern.

[0446] Among them, the SCS candidate set of the candidate SSB includes 60 KHz, and the number of OFDM symbols included in the candidate SSB is greater than or equal to 4.

[0447] In some embodiments, the SSB pattern is predefined or configured by the network side.

[0448] In some embodiments, when the SCS of the candidate SSB is 60 KHz and the number of OFDM symbols included in the candidate SSB is 4, the index of the first symbol of the candidate SSB is determined based on the following formula:

[0449] {8, 12, 16, 20, 32, 36, 40, 44} + 54×n, where n = 0 or n = 0, 1; or,

[0450] {4, 8, 16, 20} + 28×n, where n = 0, 1 or n = 0, 1, 2, 3; or,

[0451] {2, 8, 16, 22} + 28×n, where n = 0, 1 or n = 0, 1, 2, 3; or,

[0452] {2, 8} + 14×n, where n = 0, 1, 2, 3 or n = 0, 1, 2, 3, 4, 5, 6, 7.

[0453] In some embodiments, when the SCS of the candidate SSB is 15 KHz and the number of OFDM symbols included in the candidate SSB is 5, the index of the first symbol of the candidate SSB is determined based on the following formula:

[0454] {1, 8} + 14×n, where n = 0, 1 or n = 0, 1, 2, 3; or,

[0455] {2, 7} + 14×n, where n = 0, 1 or n = 0, 1, 2, 3.

[0456] In some embodiments, when the SCS of the candidate SSB is 30 KHz and the number of OFDM symbols included in the candidate SSB is 5, the index of the first symbol of the candidate SSB is determined based on the following formula:

[0457] {2, 7} + 14×n, where n = 0, 1, 2, 3 or n = 0, 1, 2, 3, 4, 5, 6, 7.

[0458] In some embodiments, when the SCS of the candidate SSB is 60 KHz and the number of OFDM symbols included in the candidate SSB is 5, the index of the first symbol of the candidate SSB is determined based on the following formula:

[0459] {1,8}+14×n, where n = 0, 1, 2, 3 or n = 0, 1, 2, 3, 4, 5, 6, 7; or,

[0460] {2,7}+14×n, where n = 0, 1, 2, 3 or n = 0, 1, 2, 3, 4, 5, 6, 7.

[0461] In some embodiments, when the SCS of the candidate SSB is 120 KHz or 240 KHz and the number of OFDM symbols included in the candidate SSB is 5, the index of the first symbol of the candidate SSB is determined based on the following formula:

[0462] {2,7}+14×n, where n = 0, 1, … 30, 31; or,

[0463] {4,9,14,19}+28×n, where n = 0, 1, … 14, 15.

[0464] In some embodiments, when the SCS of the candidate SSB is 15 KHz and the number of OFDM symbols included in the candidate SSB is 6, the index of the first symbol of the candidate SSB is determined based on the following formula:

[0465] {1,7}+14×n, where n = 0, 1 or n = 0, 1, 2, 3.

[0466] In some embodiments, when the SCS of the candidate SSB is 30 KHz and the number of OFDM symbols included in the candidate SSB is 6, the index of the first symbol of the candidate SSB is determined based on the following formula:

[0467] {1,7}+14×n, where n = 0, 1 or n = 0, 1, 2, 3; or,

[0468] {2,8,14,20}+28×n, where n = 0 or n = 0, 1.

[0469] In some embodiments, when the SCS of the candidate SSB is 60 KHz and the number of OFDM symbols included in the candidate SSB is 6, the index of the first symbol of the candidate SSB is determined based on the following formula:

[0470] {1,7}+14×n, where n = 0, 1, 2, 3 or n = 0, 1, 2, 3, 4, 5, 6, 7; or,

[0471] {2,8,14,20}+28×n, where n = 0 or n = 0, 1, 2, 3.

[0472] In some embodiments, when the SCS of the candidate SSB is 120 KHz or 240 KHz, and the number of OFDM symbols included in the candidate SSB is 6, the index of the first symbol of the candidate SSB is determined based on the following formula:

[0473] {1,7}+14×n, where n = 0, 1, … 30, 31; or,

[0474] {2,8,14,20}+28×n, where n = 0, 1, … 14, 15.

[0475] In some embodiments, when the SCS of the candidate SSB is any one of 15 KHz, 30 KHz, 60 KHz, 120 kHz, and 240 kHz, and the number of OFDM symbols included in the candidate SSB is 7, the index of the first symbol of the candidate SSB includes any one of the following:

[0476] When two candidate SSBs are configured in one time slot, the indexes of the first symbols of the two candidate SSBs are 0 and 7 respectively; or,

[0477] When one candidate SSB is configured in one time slot, the index of the first symbol of the candidate SSB is any one of {0, …, 7}.

[0478] Wherein, when two candidate SSBs are configured in one time slot, the SSB pattern within the time slot repeats among multiple time slots.

[0479] In some embodiments, when the SCS of the candidate SSB is any one of 15 KHz, 30 KHz, 60 KHz, 120 kHz, and 240 kHz, and the number of OFDM symbols included in the candidate SSB is greater than or equal to 8 and less than or equal to 14, the index of the first symbol of the candidate SSB includes any one of the following:

[0480] When one candidate SSB is configured in one time slot, the index of the first symbol of the candidate SSB is any one of {0, …, 14 - x}, where x is the number of OFDM symbols included in the candidate SSB; or,

[0481] When the candidate SSB is configured in any one of the time slots in the time slot group, the index of the first symbol of the candidate SSB is any one of {0, …, 14 - x}.

[0482] Wherein, when one candidate SSB is configured in one time slot, the SSB pattern within the time slot repeats within multiple time slots; or,

[0483] When the candidate SSB is configured in any one of the time slots in the time slot group, the SSB pattern within the time slot group repeats in other time slot groups.

[0484] When multiple candidate SSBs are configured in a time slot group, the multiple candidate SSBs are allowed to be connected across time slots, and the multiple candidate SSBs are contiguous in the time domain. Among them, the symbols of each candidate SSB among the multiple candidate SSBs are continuously distributed or discontinuously distributed.

[0485] In some embodiments, the time domain positions of the candidate SSBs in a time slot group are repeated in other time slot groups.

[0486] In some embodiments, when the first symbol of a candidate SSB does not lie in the first time slot of a half-frame or a frame, the index of the first symbol of the candidate SSB is obtained based on a time offset, and the number of symbols included in the time offset is greater than or equal to the number of symbols within a time slot. The half-frame is the half-frame with the SSB, and the frame is the frame with the SSB.

[0487] In some embodiments, when the index of the first symbol of a candidate SSB is 0, the first symbol of the candidate SSB lies in the first symbol of the first time slot in the half-frame or the frame. The half-frame is the half-frame with the SSB, and the frame is the frame with the SSB.

[0488] For the description of the content in step S201, reference may be made to the corresponding description in step S101 above, and details are not elaborated here.

[0489] In some embodiments, after the second node determines the index of the first symbol of a candidate SSB based on the SSB pattern, it may determine the time domain position of the candidate SSB based on the index of the first symbol of the candidate SSB. For the description of how to determine the time domain position of the candidate SSB based on the index of the first symbol of the candidate SSB, reference may be made to the description in the related art, and details are not elaborated here.

[0490] S202: Transmit the SSB based on the time domain position of the candidate SSB.

[0491] As an example, the second node selects some candidate SSBs from the candidate SSBs, and then transmits the SSB based on the some candidate SSBs.

[0492] In some examples, the second node copies the SSB pattern to obtain a copied SSB pattern;

[0493] Connect the copied SSB pattern after the time slot of the SSB pattern before copying; or,

[0494] Configure the copied SSB pattern into the next half-frame.

[0495] As an example, when the time domain resources occupied by the SSB pattern are greater than a half-frame, the first node copies the SSB pattern to obtain a copied SSB pattern.

[0496] In this way, it is possible to avoid the situation where the long-term data and control channels are blocked.

[0497] The above mainly introduces the solution provided by the present disclosure from the perspective of the interaction between each node. It can be understood that each node, such as the first node or the second node, includes the corresponding hardware structure and / or software module for implementing the above functions. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in the embodiments disclosed herein, the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the form of hardware or computer software driving the hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present disclosure.

[0498] The embodiments of the present disclosure can divide the first node or the second node into function modules according to the above method embodiments. For example, each function module can be divided corresponding to each function, or two or more functions can be integrated into one function module. The above integrated module can be implemented in the form of hardware or software. It should be noted that the division of modules in the embodiments of the present disclosure is illustrative, only a logical function division, and there may be other division methods in actual implementation. The following will be described by taking the example of dividing each function module corresponding to each function.

[0499] Figure 33 It is a schematic diagram of the composition of a communication device provided by an embodiment of the present disclosure. As Figure 33 shown, the communication device 30 includes a processing unit 301 and a sending unit 302.

[0500] The communication device 30 can be the above-mentioned first node or a chip in the first node. When the communication device 30 is used to implement the functions of the first node in the above embodiments, each unit is specifically used to implement the following functions.

[0501] The processing unit 301 is used to determine the time domain position of the candidate SSB based on the SSB pattern; wherein, the SCS candidate set of the candidate SSB includes 60 KHz, and the number of OFDM symbols included in the candidate SSB is greater than or equal to 4;

[0502] The receiving unit 302 is used to receive the SSB based on the time domain position of the candidate SSB.

[0503] In some embodiments, the processing unit 301 is further configured to copy the SSB pattern to obtain a copied SSB pattern; connect the copied SSB pattern after the time slot of the SSB pattern before copying; or configure the copied SSB pattern into the next half-frame.

[0504] Figure 34 FIG. is a schematic diagram of the composition of another communication device provided by an embodiment of the present disclosure. As Figure 34 shown, the communication device 40 includes a processing unit 401 and a transmitting unit 402.

[0505] The communication device 40 may be the above-mentioned second node or a chip in the second node. When the communication device 40 is used to implement the functions of the second node in the above embodiments, each unit is specifically used to implement the following functions.

[0506] The processing unit 401 is configured to determine the time domain position of the candidate SSB based on the SSB pattern; wherein, the SCS candidate set of the candidate SSB includes 60 KHz, and the number of OFDM symbols included in the candidate SSB is greater than or equal to 4.

[0507] The transmitting unit 402 is configured to transmit the SSB based on the time domain position of the candidate SSB.

[0508] It should be noted that Figure 33 and Figure 34 The units in may also be referred to as modules. For example, the transmitting unit may be referred to as a transmitting module. Additionally, in Figure 33 and Figure 34 shown in the embodiments, the names of each unit may not be the names shown in the figure. For example, the transmitting unit may also be referred to as a communication unit, and the receiving unit may also be referred to as a communication unit.

[0509] Figure 33 and Figure 34 If each unit in is implemented in the form of a software functional module and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the embodiments of the present disclosure, in essence, or the part that contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods of the various embodiments of the present disclosure. The storage media storing the computer software product include: USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs, etc., which can store program codes.

[0510] When the above-mentioned communication device 30 or communication device 40 implements the functions of the above-mentioned integrated modules in the form of hardware, the embodiments of the present disclosure provide a schematic structural diagram of a communication device. As Figure 35 shown, the communication device 50 includes: a processor 502, a communication interface 503, and a bus 504. Optionally, the communication device 50 may further include a memory 501.

[0511] The processor 502 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof that can implement or execute various exemplary logical blocks, modules, and circuits described in connection with the disclosed content of the embodiments of the present disclosure. It can implement or execute various exemplary logical blocks, modules, and circuits described in connection with the disclosed content of the embodiments of the present disclosure. The processor 502 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0512] The communication interface 503 is used to connect to other devices through a communication network. The communication network may be an Ethernet, a radio access network, a wireless local area network (WLAN), etc.

[0513] The memory 501 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a magnetic disk storage medium, or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0514] As a possible implementation, the memory 501 may exist independently of the processor 502. The memory 501 may be connected to the processor 502 through the bus 504 for storing instructions or program codes. When the processor 502 calls and executes the instructions or program codes stored in the memory 501, the synchronous signal transmission method provided by the embodiments of the present disclosure can be implemented.

[0515] In another possible implementation, the memory 501 can also be integrated with the processor 502.

[0516] The bus 504 can be an extended industry standard architecture (EISA) bus or the like. The bus 504 can be divided into an address bus, a data bus, a control bus, etc. For the sake of representation, Figure 35 only a thick line is used to represent it in the figure, but it does not mean that there is only one bus or one type of bus.

[0517] Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above functional modules is used as an example. In practical applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the first node or the second node is divided into different functional modules to complete all or part of the functions described above.

[0518] The embodiments of the present disclosure also provide a computer-readable storage medium. All or part of the processes in the above method embodiments can be completed by computer instructions instructing relevant hardware. The program can be stored in the above computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments. The above computer-readable storage medium can also be an external storage device of the above first node or second node, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the above first node or second node. Further, the above computer-readable storage medium can also include both the internal storage unit of the above first node or second node and the external storage device. The above computer-readable storage medium is used to store the above computer program and other programs and data required by the above first node or second node. The above computer-readable storage medium can also be used to temporarily store the data that has been output or will be output.

[0519] The embodiments of the present disclosure also provide a computer program product. The computer product includes a computer program. When the computer program product runs on a computer, the computer is caused to execute any one of the synchronous signal transmission methods provided in the above embodiments.

[0520] Although the present disclosure has been described in connection with various embodiments, those skilled in the art will understand and realize other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the singular "a" or "an" does not exclude a plurality. A single processor or other unit may implement several functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0521] Although the present disclosure has been described in connection with specific features and their embodiments, it will be apparent that various modifications and combinations can be made without departing from the spirit and scope of the present disclosure. Accordingly, the specification and drawings are merely exemplary illustrations of the present disclosure as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the present disclosure. Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalent technologies, the present disclosure is also intended to include these modifications and variations.

[0522] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present disclosure should be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A method for synchronizing signal transmission, characterized in that The method includes: Determining the time-domain position of a candidate SSB based on a Synchronization Signal Block (SSB) pattern; wherein, the candidate set of subcarrier spacings (SCS) of the candidate SSB includes 60 KHz, and the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols included in the candidate SSB is greater than or equal to 4; Receiving the SSB based on the time-domain position of the candidate SSB.

2. The method according to claim 1, wherein When the SCS of the candidate SSB is 60 KHz and the number of OFDM symbols included in the candidate SSB is 4, the index of the first symbol of the candidate SSB is determined based on the following formula: {8, 12, 16, 20, 32, 36, 40, 44} + 54 × n, where n = 0 or n = 0, 1; or, {4, 8, 16, 20} + 28 × n, where n = 0, 1 or n = 0, 1, 2, 3; or, {2, 8, 16, 22} + 28 × n, where n = 0, 1 or n = 0, 1, 2, 3; or, {2, 8} + 14 × n, where n = 0, 1, 2, 3 or n = 0, 1, 2, 3, 4, 5, 6, 7.

3. The method according to claim 1, characterized in that, When the SCS of the candidate SSB is 15 KHz and the number of OFDM symbols included in the candidate SSB is 5, the index of the first symbol of the candidate SSB is determined based on the following formula: {1, 8} + 14 × n, where n = 0, 1 or n = 0, 1, 2, 3; or, {2, 7} + 14 × n, where n = 0, 1 or n = 0, 1, 2, 3.

4. The method according to claim 1, wherein When the SCS of the candidate SSB is 30 KHz and the number of OFDM symbols included in the candidate SSB is 5, the index of the first symbol of the candidate SSB is determined based on the following formula: {2, 7} + 14 × n, where n = 0, 1, 2, 3 or n = 0, 1, 2, 3, 4, 5, 6, 7.

5. The method according to claim 1, wherein When the SCS of the candidate SSB is 60 KHz and the number of OFDM symbols included in the candidate SSB is 5, the index of the first symbol of the candidate SSB is determined based on the following formula: {1, 8} + 14 × n, where n = 0, 1, 2, 3 or n = 0, 1, 2, 3, 4, 5, 6, 7; or, {2, 7} + 14 × n, where n = 0, 1, 2, 3 or n = 0, 1, 2, 3, 4, 5, 6, 7.

6. The method according to claim 1, wherein When the SCS of the candidate SSB is 120 KHz or 240 KHz and the number of OFDM symbols included in the candidate SSB is 5, the index of the first symbol of the candidate SSB is determined based on the following formula: {2, 7} + 14 × n, where n = 0, 1, … 30, 31; or, {4, 9, 14, 19} + 28 × n, where n = 0, 1, … 14, 15.

7. The method according to claim 1, wherein When the SCS of the candidate SSB is 15 KHz and the number of OFDM symbols included in the candidate SSB is 6, the index of the first symbol of the candidate SSB is determined based on the following formula: {1, 7} + 14 × n, where n = 0, 1 or n = 0, 1, 2, 3.

8. The method according to claim 1, wherein When the SCS of the candidate SSB is 30 KHz and the number of OFDM symbols included in the candidate SSB is 6, the index of the first symbol of the candidate SSB is determined based on the following formula: {1,7}+14×n, where n = 0,1 or n = 0,1,2,3; or, {2,8,14,20}+28×n, where n = 0 or n = 0,1.

9. The method according to claim 1, characterized in that When the SCS of the candidate SSB is 60 KHz and the number of OFDM symbols included in the candidate SSB is 6, the index of the first symbol of the candidate SSB is determined based on the following formula: {1,7}+14×n, where n = 0,1,2,3 or n = 0,1,2,3,4,5,6,7; or, {2,8,14,20}+28×n, where n = 0 or n = 0,1,2,3.

10. The method according to claim 1, characterized in that, When the SCS of the candidate SSB is 120 KHz or 240 KHz and the number of OFDM symbols included in the candidate SSB is 6, the index of the first symbol of the candidate SSB is determined based on the following formula: {1,7}+14×n, where n = 0,1,…30,31; or, {2,8,14,20}+28×n, where n = 0,1,…14,15.

11. The method according to claim 1, wherein When the SCS of the candidate SSB is any one of 15 KHz, 30 KHz, 60 KHz, 120 kHz and 240 kHz and the number of OFDM symbols included in the candidate SSB is 7, the index of the first symbol of the candidate SSB includes any one of the following: When two candidate SSBs are configured in one time slot, the indexes of the first symbols of the two candidate SSBs are 0 and 7 respectively; Or, When one candidate SSB is configured in one time slot, the index of the first symbol of the candidate SSB is any one of {0,…,7}.

12. The method according to claim 11, wherein When two candidate SSBs are configured in one time slot, the SSB pattern within the time slot repeats among multiple time slots.

13. The method according to claim 1, characterized in that, When the SCS of the candidate SSB is any one of 15 KHz, 30 KHz, 60 KHz, 120 kHz and 240 kHz and the number of OFDM symbols included in the candidate SSB is greater than or equal to 8 and less than or equal to 14, the index of the first symbol of the candidate SSB includes any one of the following: When one candidate SSB is configured in one time slot, the index of the first symbol of the candidate SSB is any one of {0,…,14 - x}, where x is the number of OFDM symbols included in the candidate SSB; or, When the candidate SSB is configured in any time slot within a time slot group, the index of the first symbol of the candidate SSB is any one of {0,…,14 - x}.

14. The method according to claim 13, wherein When one candidate SSB is configured in one time slot, the SSB pattern within the time slot repeats within multiple time slots; Or, When any time slot in the time slot group configures the candidate SSB, the SSB pattern within the time slot group is repeated in other time slot groups.

15. The method according to claim 13, wherein When multiple candidate SSBs are configured in the time slot group, the multiple candidate SSBs are allowed to be connected across time slots, and the multiple candidate SSBs are consecutive in the time domain.

16. The method according to claim 15, characterized in that, The symbols of each candidate SSB among the multiple candidate SSBs are continuously distributed or discontinuously distributed.

17. The method according to claim 13, wherein The time domain position of the candidate SSB in the time slot group is repeated in other time slot groups.

18. The method according to any one of claims 2 to 14, characterized in that When the first symbol of the candidate SSB does not lie in the first time slot of a half-frame or a frame, the index of the first symbol of the candidate SSB is obtained based on a time offset, and the number of symbols included in the time offset is greater than or equal to the number of symbols within a time slot. The half-frame is the half-frame with an SSB, and the frame is the frame with an SSB.

19. The method according to any one of claims 2 to 14, characterized in that When the index of the first symbol of the candidate SSB is 0, the first symbol of the candidate SSB lies in the first symbol of the first time slot in a half-frame or a frame. The half-frame is the half-frame with an SSB, and the frame is the frame with an SSB.

20. The method according to claim 1, characterized in that, The method further includes: Copying the SSB pattern to obtain the copied SSB pattern; Connecting the copied SSB pattern after the time slot of the SSB pattern before copying; or, Configuring the copied SSB pattern into the next half-frame.

21. The method according to claim 1, wherein When the number X of candidate SSBs supported by the SSB pattern is less than the number Z of candidate SSBs supported by another SSB pattern, the X candidate SSBs supported by the SSB pattern are any X of the Z candidate SSBs supported by the other SSB pattern, or are the first X in the time domain position among the Z candidate SSBs supported by the other SSB. Both X and Z are positive integers.

22. The method according to claim 1, characterized in that, The SSB pattern is predefined or configured by the network side.

23. A method for synchronizing signal transmission, characterized in that The method includes: Determining the time domain position of the candidate SSB based on the SSB pattern; wherein, the SCS candidate set of the candidate SSB includes 60KHz, and the number of OFDM symbols included in the candidate SSB is greater than or equal to 4; Transmitting the SSB based on the time domain position of the candidate SSB.

24. A communication device, characterized in that, Includes: A memory and a processor; The memory and the processor are coupled; The memory is used to store instructions executable by the processor; When the processor executes the instructions, it executes the method according to any one of claims 1 to 23.

25. A computer-readable storage medium, characterized in that, Computer instructions are stored on the computer-readable storage medium. When the computer instructions run on a computer, the computer is caused to execute the method according to any one of claims 1 to 23.

26. A computer program product, characterized in that, The computer program product contains computer instructions. When the computer instructions run on a computer, the computer is caused to execute the method according to any one of claims 1 to 23.

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