Transmission method of synchronization signal block (ssb) and related apparatus

Abstract

This application discloses a method and related apparatus for transmitting a synchronization signal block (SSB), belonging to the field of communication technology. The SSB transmission method of this application includes: a terminal receiving a first SSB set, the first SSB set including a first SSB transmitted in the time domain R times, where R is a positive integer, the first SSB set satisfying any one of the following: the first SSB set includes a DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and the DMRS in the first SSB set; the first SSB in the first SSB set does not include the DMRS.

Description

Technical Field

[0001] This application belongs to the field of communication technology, specifically relating to a method and related apparatus for transmitting SSB. Background Technology

[0002] Currently, in New Radio (NR) communication systems, the Synchronization Signal and PBCH Block (SSB) occupies 4 Orthogonal Frequency Division Multiplexing (OFDM) symbols in the time domain and a maximum of 20 Resource Blocks (RBs) in the frequency domain. This allows the terminal to receive the SSB on the resources it occupies in both the time and frequency domains and perform communication-related actions (such as measurement, channel estimation, initial access, etc.) based on the SSB.

[0003] However, future communication systems may contain more diverse types of terminals and services. For example, different types of terminals may have different access bandwidths, and the information load on the broadcast channel in the SSB may increase. In such cases, the SSB needs to be optimized accordingly to ensure the performance of terminals performing communication-related activities. Summary of the Invention

[0004] This application provides an SSB transmission method and related apparatus that can improve the performance of terminals in performing communication-related activities.

[0005] In a first aspect, a method for transmitting an SSB is provided, executed by a terminal, the method comprising: the terminal receiving a first SSB set, the first SSB set including R time-domain transmitted first SSBs, where R is a positive integer, the first SSB set satisfying any one of the following: the first SSB set includes a DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with at least one of a synchronization signal and a DMRS in the first SSB set; the first SSBs in the first SSB set do not include the DMRS.

[0006] Secondly, a method for transmitting an SSB is provided, executed by a network-side device. The method includes: the network-side device sending a first SSB set, the first SSB set including R time-domain transmitted first SSBs, where R is a positive integer, the first SSB set satisfying any one of the following: the first SSB set includes a DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and the DMRS in the first SSB set; the first SSBs in the first SSB set do not include the DMRS.

[0007] Thirdly, a transmission apparatus for an SSB is provided, comprising: a receiving module. The receiving module is configured to receive a first SSB set, the first SSB set including R time-domain transmitted first SSBs, where R is a positive integer, and the first SSB set satisfying any one of the following: the first SSB set includes a DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with at least one of a synchronization signal and a DMRS in the first SSB set; the first SSBs in the first SSB set do not include DMRS.

[0008] Fourthly, a transmission apparatus for an SSB is provided, comprising: a transmitting module. The transmitting module is configured to transmit a first SSB set, the first SSB set including R time-domain transmitted first SSBs, where R is a positive integer, and the first SSB set satisfying any one of the following: the first SSB set includes a DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with at least one of a synchronization signal and a DMRS in the first SSB set; the first SSBs in the first SSB set do not include DMRS.

[0009] Fifthly, an SSB transmission apparatus is provided, the apparatus being configured to perform the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0010] In a sixth aspect, a terminal is provided, the terminal including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect.

[0011] In a seventh aspect, a terminal is provided, including a processor and a communication interface, wherein the communication interface is used to receive a first SSB set, the first SSB set including R time-domain transmitted first SSBs, where R is a positive integer, the first SSB set satisfying any one of the following: the first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and DMRS in the first SSB set; the first SSBs in the first SSB set do not include DMRS.

[0012] Eighthly, a network-side device is provided, the network-side device including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the second aspect.

[0013] A ninth aspect provides a network-side device, including a processor and a communication interface, wherein the communication interface is used to transmit a first SSB set, the first SSB set including R time-domain transmitted first SSBs, where R is a positive integer, the first SSB set satisfying any one of the following: the first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and DMRS in the first SSB set; the first SSBs in the first SSB set do not include DMRS.

[0014] In a tenth aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0015] Eleventhly, a wireless communication system is provided, comprising: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the method as described in the first aspect, and the network-side device can be used to perform the steps of the method as described in the second aspect.

[0016] In a twelfth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0017] In a thirteenth aspect, a computer program / program product is provided, the computer program / program product being stored in a storage medium, the computer program / program product being executed by at least one processor to perform the steps of the method as described in the first aspect.

[0018] In this embodiment, the terminal can receive a first SSB set, which includes R time-domain transmitted first SSBs. The first SSB set satisfies any of the following: the first SSB set includes a DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and the DMRS in the first SSB set; or the first SSBs in the first SSB set do not include DMRS. Since the first SSB set includes R time-domain transmitted first SSBs, when R is a positive integer greater than 1, the first SSB set can include multiple time-domain transmissions of the first SSBs. The terminal can improve the SSB reception performance based on these multiple time-domain transmissions of the first SSBs. And / or, since the first SSB set can satisfy the requirement that the first SSB set includes DMRS and that the PBCH in the first SSB set does not overlap with the DMRS, that is, the DMRS included in the first SSB set only needs to satisfy the requirement that it does not overlap with the PBCH, and does not need to occupy fixed resources in the time domain and frequency domain. For example, DMRS needs to exist on each symbol occupied by the PBCH. Therefore, in different scenarios, the resources occupied by the DMRS can be flexibly allocated according to the needs of different scenarios, so that the terminal can accurately receive the first SSB. Alternatively, since the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with the synchronization signal in the first SSB set, the overall resources occupied by the first SSB can be reduced, thus improving the system's resource utilization. And / or, since the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with the DMRS, the resources occupied by the PBCH are not limited by the resources occupied by the DMRS, thus increasing the amount of information the PBCH can carry. This allows the terminal to obtain more system information through the PBCH, thereby improving the performance of the terminal's communication-related actions. Alternatively, since the first SSB in the first SSB set does not include a DMRS, the resources occupied by the PBCH are not limited by the resources occupied by the DMRS, thus increasing the amount of information the PBCH can carry. This allows the terminal to obtain more system information through the PBCH, thereby improving the performance of the terminal's communication-related actions.

[0019] In this embodiment, the network-side device can send a first SSB set, which includes R time-domain transmitted first SSBs. The first SSB set satisfies any of the following: the first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and DMRS in the first SSB set; or the first SSBs in the first SSB set do not include DMRS. Since the first SSB set includes R time-domain transmitted first SSBs, when R is a positive integer greater than 1, the first SSB set can include multiple time-domain transmissions of the first SSBs. The terminal can improve the SSB reception performance based on these multiple time-domain transmissions of the first SSBs. And / or, since the first SSB set can satisfy the condition that the first SSB set includes DMRS and the PBCH in the first SSB set does not overlap with the DMRS, that is, the DMRS included in the first SSB set only needs to satisfy the condition that it does not overlap with the PBCH, without occupying fixed resources in the time and frequency domains. For example, DMRS needs to exist on each symbol of the PBCH. Therefore, in different scenarios, the resources occupied by the DMRS can be flexibly allocated according to the needs of different scenarios, so that the terminal can accurately receive the first SSB. Or, since the first SSB set can satisfy the condition that the first SSB set includes DMRS and the PBCH in the first SSB set overlaps with the synchronization signal in the first SSB set, the overall resources occupied by the first SSB can be reduced, thus improving the resource utilization of the system; and / or, since the first SSB set can satisfy the condition that the first SSB set includes DMRS and the PBCH in the first SSB set overlaps with the DMRS, the resources occupied by the PBCH are not limited by the resources occupied by the DMRS. Therefore, the amount of information that the PBCH can carry can be increased, so that the terminal can obtain more system information through the PBCH, thereby improving the performance of the terminal in communication-related behaviors. Alternatively, since the first SSB in the first SSB set does not include DMRS, the resources occupied by PBCH are not limited by the resources occupied by DMRS. Therefore, the amount of information that PBCH can carry can be increased, so that the terminal can obtain more system information through PBCH, thereby improving the performance of the terminal in communication-related activities. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the SSB structure in related technologies;

[0021] Figure 2 This is a block diagram of a wireless communication system provided in an embodiment of this application;

[0022] Figure 3This is one of the flowcharts illustrating the SSB transmission method provided in the embodiments of this application;

[0023] Figure 4A This is one of the resource usage diagrams of the SSB transmission method provided in the embodiments of this application;

[0024] Figure 4B This is the second schematic diagram of resource usage for the SSB transmission method provided in this application embodiment;

[0025] Figure 4C This is the third schematic diagram of resource usage for the SSB transmission method provided in this application embodiment;

[0026] Figure 5A This is the fourth schematic diagram of resource usage for the SSB transmission method provided in the embodiments of this application;

[0027] Figure 5B This is the fifth schematic diagram illustrating the resource usage of the SSB transmission method provided in this application embodiment;

[0028] Figure 5C This is the sixth schematic diagram of resource usage for the SSB transmission method provided in this application embodiment;

[0029] Figure 5D This is the seventh schematic diagram of resource usage for the SSB transmission method provided in the embodiments of this application;

[0030] Figure 6 This is the eighth schematic diagram of resource usage for the SSB transmission method provided in the embodiments of this application;

[0031] Figure 7A This is the ninth schematic diagram of resource usage for the SSB transmission method provided in the embodiments of this application;

[0032] Figure 7B This is the tenth schematic diagram of resource usage for the SSB transmission method provided in the embodiments of this application;

[0033] Figure 7C This is eleventh of the resource usage diagrams for the SSB transmission method provided in the embodiments of this application;

[0034] Figure 8A This is the twelfth schematic diagram of resource usage for the SSB transmission method provided in the embodiments of this application;

[0035] Figure 8B This is the thirteenth schematic diagram of resource usage for the SSB transmission method provided in this application embodiment;

[0036] Figure 9 This is the fourteenth schematic diagram of resource usage for the SSB transmission method provided in the embodiments of this application;

[0037] Figure 10 This is a second schematic flowchart of the SSB transmission method provided in the embodiments of this application;

[0038] Figure 11 This is the third flowchart illustrating the SSB transmission method provided in this application embodiment;

[0039] Figure 12 This is the fourth flowchart illustrating the SSB transmission method provided in this application embodiment;

[0040] Figure 13 This is the fifth flowchart illustrating the SSB transmission method provided in the embodiments of this application;

[0041] Figure 14 This is the sixth flowchart illustrating the SSB transmission method provided in this application embodiment;

[0042] Figure 15 This is one of the structural schematic diagrams of the SSB transmission device provided in the embodiments of this application;

[0043] Figure 16 This is a second schematic diagram of the structure of the SSB transmission device provided in the embodiments of this application;

[0044] Figure 17 This is a schematic diagram of the hardware structure of the communication device provided in the embodiments of this application;

[0045] Figure 18 This is a schematic diagram of the hardware structure of the terminal provided in the embodiments of this application;

[0046] Figure 19 This is a schematic diagram of the hardware structure of the network-side device provided in the embodiments of this application. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0048] The terminology used in the embodiments of this application will be explained below.

[0049] 1. SSB

[0050] In New Radio (NR) systems, terminals first perform initial access by receiving a synchronization signal block (also known as the synchronization signal and PBCH block). The structure of the SSB is as follows: Figure 1 As shown, the entire SSB occupies 4 OFDM symbols in the time domain (i.e., Figure 1 The subcarriers l0, l0+1, l0+2, and l0+3 occupy a maximum of 20 RBs in the frequency domain, which is equivalent to 240 subcarriers. Due to the limited time-frequency resources occupied by the SSB, only a relatively preliminary coarse time-frequency synchronization can be performed based on the SSB.

[0051] The SSB consists of the Primary Synchronization Signals (PSS), Secondary Synchronization Signals (SSS), the Physical Broadcast Channel (PBCH), and the Demodulation Reference Signal (DMRS) of the PBCH. The PSS occupies one OFDM symbol (10) in the time domain and 127 subcarriers in the frequency domain. The SSS occupies one OFDM symbol (10+2) in the time domain and 127 subcarriers in the frequency domain. The PBCH occupies three OFDM symbols (10+1, 10+2, and 10+3) in the time domain and a maximum of 20 RBs (240 subcarriers) in the frequency domain. The PSS and SSS are used for coarse time-frequency synchronization, the PBCH carries the Master Information Block (MIB), and the PBCH DMRS is used for demodulation of the PBCH.

[0052] Of course, the position of the SSB (e.g., an SSB occupying 4 OFDM symbols) in the time domain can differ under different subcarrier spacings. Figure 1As shown, with a subcarrier spacing of 15 kHz, the location of the SSB can include OFDM symbols 2-5 and 8-11 in slots n and n+1. With a subcarrier spacing of 30 kHz, in transmission pattern 1, the location of the SSB can include OFDM symbols 4-7 and 8-11 in slot n, and OFDM symbols 2-5 and 6-9 in slot n+1. With a subcarrier spacing of 30 kHz, in transmission pattern 2, the location of the SSB can include OFDM symbols 2-5 and 8-11 in slot n, and OFDM symbols 2-5 and 8-11 in slot n+1. With a subcarrier spacing of 120 kHz, the location of the SSB can include OFDM symbols 4 to 7 and 8 to 11 in slot n, and OFDM symbols 2 to 5 and 6 to 9 in slot n+1. With a subcarrier spacing of 240 kHz, the location of the SSB can include OFDM symbols 8 to 11 in slot n, OFDM symbols 12 to 1 in slot n+1, OFDM symbols 2 to 5 in slot n+1, OFDM symbols 6 to 9 in slot n+1, OFDM symbols 4 to 7 in slot n+2, OFDM symbols 8 to 11 in slot n+2, OFDM symbols 12 to 11 in slot n+3, and OFDM symbols 2 to 5 in slot n+3.

[0053] When the terminal receives an SSB, it can first detect the PSS sequence and obtain the Physical Cell ID based on the sequence correlation. And obtain preliminary time-frequency synchronization; then detect SSS, and obtain the physical cell ID based on sequence correlation. Thus, the complete Physical Cell ID (PCI) can be obtained, i.e. The terminal can further adjust the frequency offset based on PSS and SSS. Then, the terminal detects the DMRS of PBCH to perform channel estimation and demodulate PBCH.

[0054] In addition to coarse synchronization, SSBs are also used for beam training in NR systems. Especially before RRC connection, during the initial access phase, SSBs are used for preliminary beam training to ensure the transmission performance of random access related signals. For frequencies below 3 GHz, a single SSB burst set can contain a maximum of 4 SSBs and scan a maximum of 4 beams; for frequencies between 3 GHz and 6 GHz, a single SSB burst set can contain a maximum of 8 SSBs and scan a maximum of 8 beams; for millimeter-wave frequencies above 6 GHz, a single SSB burst set can contain a maximum of 64 SSBs and scan a maximum of 64 beams.

[0055] 2. PBCH DMRS

[0056] First, regarding the resource mapping method of DMRS in PBCH: it can be summarized as follows: the resource element (RE) mapping of DMRS is a comb-like structure (comb4), meaning that the RE interval occupied by two DMRSs in the frequency domain is 4 REs. In addition, RE offset can be performed, with the offset value being: Modulo 4, to reduce DMRS interference between neighboring cells.

[0057] Furthermore, the DMRS sequence is a pseudo-random sequence, and its initialization factor includes the physical cell ID. SSB index, half-frame number, etc. When detecting DMRS, the terminal also infers some or all of the SSB index information. The specific sequence generation formula is as follows:

[0058]

[0059] x1(n+31)=(x1(n+3)+x1(n))mod2;Formula (3)

[0060] x²(n+3) = (x²(n+3) + x²(n+2) + x²(n+1) + x²(n)) mod 2; Formula (4)

[0061] c(n)=(x1(n+N C )+x2(n+N C ))mod2; formula (5)

[0062]

[0063] in, This can be understood as a value ranging from 0 to 7, calculated using 3 bits, determined by the SSB index and half-frame number. When L maxWhen the value is 4 (corresponding to a scene with 4 beams), the SSB index corresponds to 2 LSB bits, and the half-frame number corresponds to 1 MSB, thus forming... When L max When the value is 8 (corresponding to a scenario with 8 beams), the SSB index exactly corresponds to... 3 bits; when L max When the value is 64 (corresponding to a scenario with 64 beams), the 3 LSBs of the SSB index correspond to... The other three MSB bits of the SSB are determined by the 4th, 5th, and 6th bits of the layer L1-payload. It is important to note that L... max For different frequency bands, when a terminal accesses a different frequency band, the assumed L is determined by default. max Values. When L max When = 4: the first half of the frame: n hf =0, the second half of the frame: nhf=1, when L max When n = 8 or 64: hf =0 (always 0).

[0064] Therefore, it can be calculated using formula (1). Then Substituting into formula (2), we can calculate C. init (i.e., initialization parameters), and then calculate the X1 sequence and X2 sequence using formulas (3) and (4), and then C can be used to initialize the X1 sequence and X2 sequence. init Substitute the X1 and X2 sequences into formula (5) to calculate the pseudo-random sequence C(n). Finally, substitute C(n) into formula (6) to determine the sequence of DMRS.

[0065] 3. Physical Downlink Shared Channel (PDSCH) / Physical Uplink Shared Channel (PUSCH) DMRS

[0066] Prior to Rel-18, DMRS configuration type 1 supported a maximum of 4 ports for a single-symbol structure and a maximum of 8 ports for a dual-symbol structure; DMRS configuration type 2 supported a maximum of 6 ports for a single-symbol structure and a maximum of 12 ports for a dual-symbol structure. Furthermore, DMRS configuration type 1 supported 2 code division multiplexing (CDM) groups, while DMRS configuration type 2 supported 3 CDM groups. Ports within the same CDM group were multiplexed using orthogonal cover codes of frequency domain (FD-OCC) and time domain (TD-OCC) of length 2. The specific resource mapping method for the DMRS reference signal is as follows:

[0067]

[0068] Where k represents the DMRS frequency domain occupied location identifier, l represents the DMRS time domain occupied location identifier, and p represents the antenna port. f (k') represents the FD-OCC sequence, where the length of the FD-OCC sequence is 2, and w t (l') represents the TD-OCC sequence, where the length of the TD-OCC sequence is 2, and r(*) represents the DMRS sequence.

[0069] Table 1 shows the configuration parameters related to Type 1 DMRS, as shown in Table 1:

[0070] Table 1

[0071]

[0072] Table 2 shows the configuration parameters related to Type 2DMRS, as shown in Table 2:

[0073] Table 2

[0074]

[0075]

[0076] This allows us to determine the corresponding configuration parameters based on the type of DMRS, thus enabling resource mapping of DMRS reference signals.

[0077] Rel-18 enhances DMRS by doubling the number of ports compared to Rel-15 DMRS. It also uses FD-OCC sequences of length 4 to multiplex DMRS ports within the same CDM group, thus doubling the maximum number of DMRS ports compared to Rel-15 DMRS's FD-OCC sequence of length 2. In other words, in Rel-18, for DMRS type 1, a single-symbol structure supports a maximum of 8 ports, and a double-symbol structure supports a maximum of 16 ports; for DMRS type 2, a single-symbol structure supports a maximum of 12 ports, and a double-symbol structure supports a maximum of 24 ports. The overall pattern is largely similar to Rel-15 DMRS and will not be elaborated upon here.

[0078] Furthermore, for the scheduling of fallback downlink control information (DCI), the NR protocol specifies some default DMRS configurations. For PDSCH, when scheduling via DCI format 1_0, or when RRC does not configure any of the higher-level parameters such as dmrs-AdditionalPosition, masLength, and dmrs-Type, the terminal must assume that the PDSCH will not appear on symbols with DMRS (unless it is a 2-symbol PDSCH scheduled in TDRamappingtypeB format). The DMRS configuration type is DMRS type 1, port 1000, and the remaining orthogonal DMRS ports are not associated with PDSCH transmitted to other terminals. In addition, the following must also be satisfied:

[0079] For PDSCH of TDRAmapping types A and B, the terminal needs to assume dmrs-AdditionalPosition = pos2, and the maximum number of additional symbols per symbol is 2;

[0080] For a PDSCH occupying 2 symbols scheduled in the form of TDRAmapping type B, the terminal needs to assume that the PDSCH appears on a symbol where DMRS exists.

[0081] 4. Other terms

[0082] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, the scope of protection for "A or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. In addition, the terms "A and / or B," "at least one of A and B," and "at least one of A or B" also cover at least the above three scenarios. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0083] The term "instruction" in this application can be either a direct instruction (or explicit instruction) or an indirect instruction (or implicit instruction). A direct instruction can be understood as the sender explicitly informing the receiver of specific information, the required operation, or the requested result in the instruction sent. An indirect instruction can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the required operation or requested result based on the judgment result.

[0084] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), or other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and the term NR is used in most of the following description; however, these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0085] Figure 2This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can also be referred to as a user equipment (UE), and can be a mobile phone, tablet computer, laptop computer, notebook computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR), virtual reality (VR) device, robot, wearable device, flight vehicle, vehicle user equipment (VUE), shipboard equipment, pedestrian user equipment (PUE), smart home (home devices with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), ATM, or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among these, in-vehicle devices can also be referred to as in-vehicle terminals, in-vehicle controllers, in-vehicle modules, in-vehicle components, in-vehicle chips, or in-vehicle units, etc. It should be noted that the specific type of terminal 11 is not limited in this application embodiment. Network-side equipment 12 may include access network equipment or core network equipment, wherein access network equipment may also be referred to as Radio Access Network (RAN) equipment, radio access network function, or radio access network unit. Access network equipment may include base stations, Wireless Local Area Network (WLAN) access points (APs), or Wireless Fidelity (Wi-Fi) nodes, etc.Among them, base stations can be referred to as Node B (NB), Evolved Node B (eNB), Next Generation Node B (gNB), New Radio Node B (NRNodeB), Access Point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B, Transmit / Receive Point (TRP), Non-Terrestrial Network (NTN) equipment (such as satellite or high altitude platform stations). The term "base station" can be any suitable term in the field, such as "station" or any other appropriate term in the relevant field, as long as the same technical effect is achieved. The term "base station" is not limited to specific technical terms. It should be noted that the embodiments of this application only use the base station in the NR system as an example for introduction, and do not limit the specific type of base station.

[0086] The following description, in conjunction with the accompanying drawings, details the SSB transmission method and related apparatus provided in this application through some embodiments and application scenarios.

[0087] Currently, in NR communication systems, a Service-Specific Broadcast (SSB) occupies 4 OFDM symbols in the time domain and a maximum of 20 Relays (RBs) in the frequency domain. This allows terminals to receive the SSB using the resources allocated in both the time and frequency domains and perform communication-related actions (such as measurement, channel estimation, and initial access). However, future communication systems may involve more diverse types of terminals and services. For example, different types of terminals may have different access bandwidths, and the information load on the broadcast channel within the SSB may increase. In such cases, it is necessary to enhance the SSB, especially ensuring the transmission performance of the broadcast channel, thereby guaranteeing the performance of the terminal's communication-related actions.

[0088] To address the aforementioned issues, this application provides an SSB transmission method. Figure 3 A flowchart illustrating the SSB transmission method provided in an embodiment of this application is shown. Figure 3 As shown, the SSB transmission method provided in this application embodiment includes the following step 101.

[0089] Step 101: The terminal receives the first SSB set.

[0090] In this embodiment of the application, the first SSB set includes a first SSB with R time-domain transmissions, where R is a positive integer.

[0091] In some embodiments of this application, the first SSB may also be referred to as any signal set or signal module that includes at least one of the following: synchronization signal, broadcast signal, broadcast channel (PBCH), other system message downlink broadcast channel and its control channel or control resource set or control channel search space.

[0092] In some embodiments of this application, the first SSB of the above-mentioned R time-domain transmissions can be understood as: at least a portion of the signal of the first SSB is transmitted in the time domain R times, that is, the R time-domain transmissions can also be understood as R time-domain repeated transmissions.

[0093] In some embodiments of this application, when R is 1, it can be understood that at least a portion of the signal of the first SSB is not transmitted repeatedly in the time domain, i.e., it is transmitted only once. When R is a positive integer greater than 1, it can be understood that at least a portion of the signal of the first SSB is transmitted in the time domain R times (i.e., transmitted repeatedly in the time domain R times).

[0094] It is understandable that when R is a positive integer greater than 1, since at least a portion of the signal of the first SSB can be transmitted in the time domain at least twice, better initial access performance, PBCH demodulation reliability, or SSB measurement performance (e.g., SSB measurement performance in high-speed scenarios) can be obtained, or the accuracy of time-frequency tracking of the cell corresponding to the first SSB can be further improved.

[0095] In this embodiment of the application, the first SSB set described above satisfies any one of the following:

[0096] The first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with DMRS;

[0097] The first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signals and DMRS in the first SSB set;

[0098] DMRS is not included in the first SSB of the first SSB set.

[0099] In some embodiments of this application, the DMRS described above is used to demodulate the PBCH, or the DMRS described above is associated with the PBCH.

[0100] In some embodiments of this application, the above non-overlap can be understood as at least one of the following: occupying different time-frequency resources, occupying different time-domain resources, or occupying different frequency-domain resources. For example, PBCH and DMRS reuse resources through frequency division multiplexing. In this case, it can be considered that PBCH and DMRS occupy different time-frequency resources.

[0101] In some embodiments of this application, the term "non-overlapping" may also be referred to as "non-overlapping." Of course, "non-overlapping" can also be referred to by other names, and this application does not limit this terminology.

[0102] In some embodiments of this application, the first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS. This can also be understood as: the first SSBs of the R time-domain transmissions in the first SSB set include at least a portion of the first SSBs, and the DMRS in the at least a portion of the first SSBs does not overlap with the at least one PBCH.

[0103] In some embodiments of this application, the synchronization signal may include at least one of the following: PSS and SSS. Of course, the synchronization signal may also include other signals, and this application does not limit this.

[0104] In some embodiments of this application, the above-mentioned overlap can be understood as at least one of the following: occupying the same time-frequency resources, occupying the same time-domain resources, and occupying the same frequency-domain resources.

[0105] In some embodiments of this application, the aforementioned overlap may also be referred to as superposition. Of course, the overlap may also be referred to by other names, and the embodiments of this application do not limit this.

[0106] In some embodiments of this application, the PBCH in the first SSB set overlaps with at least one of the synchronization signal and DMRS in the first SSB set. This can also be understood as: the first SSB with R time-domain transmissions in the first SSB set includes at least a portion of the first SSBs, which includes DMRS; and the synchronization signal and / or DMRS in the at least a portion of the first SSBs overlaps with the PBCH.

[0107] The following example illustrates the specific conditions that a DMRS must satisfy when the first SSB set includes a DMRS.

[0108] Example 1: Include DMRS in the first SSB set.

[0109] In some embodiments of this application, the first SSB set satisfies any one of the following: the first SSB set includes a DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and the DMRS in the first SSB set; the DMRS satisfies at least one of the following:

[0110] DMRS exists on at least a portion of the first time unit occupied by PBCH;

[0111] The frequency domain resources occupied by DMRS differ at least in a portion of the first time unit occupied by PBCH;

[0112] The sequences of the DMRS differ in at least a portion of the first time unit occupied by the PBCH.

[0113] In some embodiments of this application, the first time unit mentioned above includes at least one of the following: OFDM symbol, OFDM symbol group, slot, frame, paging cycle, discontinuous reception (DRX) cycle, discontinuous transmission (DTX) cycle, SSB burst set, SSB cycle, SSB-to-random access opportunity association cycle, SSB-to-random access opportunity association mode cycle, and determination window for random access opportunity group of repeated transmissions of Physical Random Access Channel (PRACH).

[0114] In other examples, the first time unit mentioned above can be determined by a function of at least one of the following: OFDM symbol, OFDM symbol group, slot, frame, paging cycle, DRX cycle, DTX cycle, SSB burst set, SSB cycle, SSB-to-random access opportunity association cycle, SSB-to-random access opportunity association mode cycle, and the determination window of the random access opportunity group for PRACH repeated transmissions.

[0115] In some embodiments of this application, the existence of DMRS in at least a portion of the first time units occupied by PBCH can be understood as: frequency domain resources occupied by DMRS also exist in at least a portion of the first time units occupied by PBCH.

[0116] It is understandable that when DMRS exists only on the portion of the first time unit occupied by PBCH, the overall overhead of DMRS can be saved, thereby allowing PBCH to carry more information. In other words, PBCH can carry a larger load of MIB or layer 1 load.

[0117] In some embodiments of this application, when the DMRS satisfies the condition that the DMRS exists in at least a portion of the first time units occupied by the PBCH, the frequency domain resources occupied by the PBCH and the frequency domain resources occupied by the DMRS in the at least a portion of the first time units can be distributed in an FDM manner. It is understood that the frequency domain resources occupied by the PBCH and the frequency domain resources occupied by the DMRS in the at least a portion of the first time units do not overlap.

[0118] In some embodiments of this application, the existence of DMRS in at least a portion of the first time units occupied by PBCH, and the different frequency domain resources occupied by DMRS in different first time units in at least a portion of the first time units, can also be understood as: the frequency domain resources occupied by DMRS in different first time units in at least a portion of the first time units occupied by PBCH may be different.

[0119] In some embodiments of this application, the frequency domain resources occupied by DMRS differ in at least one of the following during at least a portion of the first time units occupied by PBCH:

[0120] The number of frequency domain resources occupied by DMRS differs;

[0121] The frequency domain resources occupied by DMRS are offset differently.

[0122] In some examples, the number of frequency domain resources occupied by DMRS in at least a portion of the first time units occupied by PBCH is different. This can also be understood as: the number of frequency domain resources occupied by DMRS in different first time units may be different in at least a portion of the first time units occupied by PBCH.

[0123] In some examples, the number of frequency domain resources occupied by the aforementioned DMRS varies, including at least one of the following:

[0124] The frequency domain resource density occupied by DMRS is different;

[0125] There are subset relationships among the frequency domain resources occupied by DMRS.

[0126] In particular, the frequency domain resource density occupied by DMRS in different first time units can be agreed upon by the protocol or configured by the network-side equipment, in at least a portion of the first time units occupied by PBCH.

[0127] For example, assuming that the frequency domain resource densities occupied by DMRS are different, the DMRS on some OFDM symbols occupied by PBCH can adopt a comb-4 structure, while the DMRS on other OFDM symbols occupied by PBCH can adopt a comb-8 structure.

[0128] Among them, the subset relationship between the frequency domain resources occupied by DMRS in different first time units can be agreed upon by the protocol or configured by the network-side equipment on at least a portion of the first time units occupied by PBCH.

[0129] For example, there is a subset relationship between the frequency domain resources occupied by the DMRS. This can be understood as the frequency domain resources occupied by the PBCH on a portion of the OFDM symbols occupied by the PBCH being a subset of the frequency domain resources occupied by the PBCH on another portion of the OFDM symbols occupied by the PBCH.

[0130] For example, assuming that PBCH occupies OFDM symbol 1 and OFDM symbol 2, then the frequency domain resources occupied by PBCH on OFDM symbol 1 include frequency domain resource 1 and frequency domain resource 2, and the frequency domain resources occupied by PBCH on OFDM symbol 2 include frequency domain resource 1, frequency domain resource 2 and frequency domain resource 3. In other words, the frequency domain resources occupied by PBCH on OFDM symbol 1 are a subset of the frequency domain resources occupied by PBCH on OFDM symbol 2.

[0131] Thus, since the embodiments of this application specify various possible scenarios involving different numbers of frequency domain resources occupied by DMRS, the terminal can accurately determine the DMRS on at least a portion of the first time unit occupied by PBCH based on these scenarios, so as to accurately receive the DMRS. Therefore, the terminal can use the DMRS to accurately decode PBCH, thereby ensuring the demodulation performance of PBCH while saving the overhead of DMRS.

[0132] In some examples, the existence of DMRS in at least a portion of the first time units occupied by PBCH, and the different offsets of the frequency domain resources occupied by DMRS in different first time units within at least a portion of the first time units, can also be understood as: the offsets of the frequency domain resources occupied by DMRS in different first time units where DMRS exists can be different in at least a portion of the first time units occupied by PBCH.

[0133] In some examples, the offset of the frequency domain resources occupied by the aforementioned DMRS can be a RE offset. Of course, this offset can also be other offsets, and this application embodiment does not limit this.

[0134] In some examples, the offset of the frequency domain resources occupied by the aforementioned DMRS is determined based on at least one of the following:

[0135] Index of the first time unit;

[0136] The time-domain retransmission identifier ID corresponding to the time-domain transmission;

[0137] The time-domain retransmission group ID corresponding to the time-domain transmission;

[0138] The number of time-domain transfers;

[0139] The interval between two consecutive time-domain transmissions;

[0140] The synchronization grid of the first SSB;

[0141] The cell ID corresponding to the first SSB;

[0142] Index of the first SSB;

[0143] The index of the SSB group to which the first SSB belongs;

[0144] The type of the first SSB;

[0145] The signal that triggers the first SSB set;

[0146] Wake-up signal WUS;

[0147] Physical Random Access Channel (PRACH).

[0148] In some examples, where the offset of the frequency domain resources occupied by the DMRS is determined based on the index of the first time unit, the offset (e.g., RE offset) of the frequency domain resources occupied by the DMRS in the first time unit of at least a portion of the first time units occupied by the PBCH can be X; the offset (e.g., RE offset) of the frequency domain resources occupied by the DMRS in the first time unit of at least a portion of the first time units occupied by the PBCH can be X+1, and so on. Thus, the offset of the frequency domain resources occupied by the DMRS in a given first time unit can be accurately determined based on the index of that first time unit; X is a positive integer.

[0149] In some examples, the aforementioned time-domain repeater identifier ID may include the number of the time-domain repeater.

[0150] In some examples, where the offset of the frequency domain resources occupied by DMRS is determined based on the time-domain repetition identifier ID corresponding to the time-domain transmission, the offset (e.g., RE offset) of the frequency domain resources occupied by DMRS in the first time-domain transmission occupied by PBCH in the first time-domain transmission can be Y; in the second time-domain transmission, the offset (e.g., RE offset) of the frequency domain resources occupied by DMRS in the first time-domain transmission occupied by PBCH can be Y+1, and so on. Thus, based on the time-domain repetition identifier ID corresponding to a certain time-domain transmission, the offset of the frequency domain resources occupied by DMRS in one or more first time-domain transmissions corresponding to that time-domain identifier ID can be accurately determined; Y is a positive integer.

[0151] It should be noted that the explanation regarding the determination of the offset of the frequency domain resources occupied by DMRS based on the time domain repetition group ID corresponding to the time domain transmission can be found in the detailed description of the determination of the offset of the frequency domain resources occupied by DMRS based on the time domain repetition identifier ID corresponding to the time domain transmission in the above embodiments. This application embodiment will not repeat the description here.

[0152] In some examples, where the offset of the frequency domain resources occupied by DMRS is determined based on the number of time-domain transmissions, the offset of the frequency domain resources occupied by DMRS in the first time-domain transmission (e.g., RE offset) in the first time-domain transmission occupied by PBCH can be Z; in the second time-domain transmission, the offset of the frequency domain resources occupied by DMRS in the first time-domain transmission occupied by PBCH (e.g., RE offset) can be Z+1, and so on. Thus, the offset of the frequency domain resources occupied by DMRS in one or more first time-domain transmissions can be accurately determined based on the number of transmissions in a given time-domain transmission; Z is a positive integer.

[0153] In some examples, where the offset of the frequency domain resources occupied by DMRS is determined based on the interval between two adjacent time domain transmissions, and where the interval between the Nth and N+1th time domain transmissions is a predetermined value, the offset (e.g., RE offset) of the frequency domain resources occupied by DMRS in the first time unit occupied by PBCH in the first time domain transmission can be A, and the offset (e.g., RE offset) of the frequency domain resources occupied by DMRS in the first time unit occupied by PBCH in the second time domain transmission can be A+1, and so on; A is a positive integer.

[0154] In some examples, where the offset of the frequency domain resources occupied by the DMRS is determined based on the synchronization signal in the first SSB, an offset can be determined based on the synchronization signal in the first SSB. This offset can then be used to determine the offset of the frequency domain resources occupied by the DMRS in the first time unit within at least a portion of the first time units occupied by the PBCH, and the offset of the frequency domain resources occupied by the DMRS in the second time unit can be determined as this offset value + 1, and so on. Of course, other methods can also be used to determine the offset of the frequency domain resources occupied by the DMRS based on the synchronization signal in the first SSB, and this application does not limit this approach.

[0155] In some examples, when the offset of the frequency domain resources occupied by the DMRS is determined based on WUS, an offset corresponding to the first SSB can be determined according to WUS. This offset can then be used to determine the offset of the frequency domain resources occupied by the DMRS in the first time unit within at least a portion of the first time units occupied by the PBCH, and the offset of the frequency domain resources occupied by the DMRS in the second time unit can be determined as this offset + 1, and so on. Of course, other methods can also be used to determine the offset of the frequency domain resources occupied by the DMRS based on WUS, and this application does not limit this approach.

[0156] In some examples, where the offset of the frequency domain resources occupied by the DMRS is determined based on the signal that triggers the first SSB set, this signal can implicitly or explicitly indicate an offset. This offset can be used to determine the offset of the frequency domain resources occupied by the DMRS in the first time unit of at least a portion of the first time units occupied by the PBCH, and the offset of the frequency domain resources occupied by the DMRS in the second time unit can be determined as this offset value + 1, and so on. Of course, other methods can also be used to determine the offset of the frequency domain resources occupied by the DMRS based on the signal that triggers the first SSB set; this application embodiment does not limit this approach.

[0157] In some examples, when the offset of the frequency domain resources occupied by the DMRS is determined based on the PRACH, an offset corresponding to the relevant parameters of the PRACH can be determined. This offset can then be used to determine the offset of the frequency domain resources occupied by the DMRS in the first time unit of at least a portion of the first time units occupied by the PBCH, and the offset of the frequency domain resources occupied by the DMRS in the second time unit can be determined as this offset value + 1, and so on. Of course, other methods can also be used to determine the offset of the frequency domain resources occupied by the DMRS based on the PRACH, and this application does not limit this approach.

[0158] Thus, since the embodiments of this application specify the method for determining the offset of the frequency domain resources occupied by DMRS, the terminal can accurately determine the offset of the frequency domain resources occupied by DMRS based on this method, so as to accurately receive DMRS. Therefore, the terminal can use DMRS to accurately decode PBCH, thereby improving the demodulation performance of PBCH.

[0159] As can be seen from the above, since the number of frequency domain resources occupied by DMRS in this embodiment can be different, rather than necessarily the same, in some first time units on at least a portion of the first time units occupied by PBCH, the number of frequency domain resources occupied by DMRS can be the same as the number of frequency domain resources occupied by DMRS in related technologies, while in other first time units, the number of frequency domain resources occupied by DMRS can be less than the number of frequency domain resources occupied by DMRS in related technologies. Therefore, the overhead of DMRS can be saved. Furthermore, since DMRS exists on both some and other first time units, the demodulation performance of PBCH can be guaranteed. And / or, since the offset of the frequency domain resources occupied by DMRS in this embodiment can be different, diversity gain in the frequency domain can be obtained, thereby improving the demodulation performance of PBCH.

[0160] For example, suppose the first set includes a first SSB with one time-domain transmission, i.e., no time-domain repetition transmission. The PBCH in this first SSB can occupy 4 OFDM symbols, such as... Figure 4A As shown, DMRS exists on the first OFDM symbol (OFDM symbol 2) to the third OFDM symbol (OFDM symbol 5) of the four OFDM symbols (which can be understood as time-frequency resources occupied by DMRS), while DMRS may not exist on the fourth OFDM symbol (OFDM symbol 6). Or, as... Figure 4B As shown, a significant amount of frequency domain resources occupied by DMRS can exist in the first OFDM symbol (OFDM symbol 2) and the second OFDM symbol (OFDM symbol 4) of the four OFDM symbols occupied by PBCH. For example... Figure 4B Of the eight frequency domain resources shown, a smaller number of frequency domain resources occupied by DMRS can exist on the third OFDM symbol (i.e., OFDM symbol 5) and the fourth OFDM symbol (i.e., OFDM symbol 6) of the four OFDM symbols occupied by PBCH, for example... Figure 4B The four frequency domain resources. Of course, the RE offset of the DMRS on these four OFDM symbols can also be different, thus obtaining diversity gain in the frequency domain, such as... Figure 4C As shown.

[0161] It should be noted that, in Figures 4A to 4C The diagram illustrates a resource of a signal represented by a rectangle. This rectangle may correspond to one OFDM symbol and 12 RBs; however, the embodiments of this application do not limit the resources corresponding to this rectangle.

[0162] To illustrate further, suppose the first set includes a first SSB with two time-domain transmissions, and the PBCH in the first SSB occupies two OFDM symbols, such as... Figure 5A As shown, in the second time-domain transmission, only the first OFDM symbol (i.e., OFDM symbol n+2) has DMRS (which can be understood as the time-frequency resources occupied by DMRS), while the second OFDM symbol (i.e., OFDM symbol n+4) does not have DMRS. Furthermore, rate matching can be used to adjust the data rate on the second OFDM symbol (i.e., OFDM symbol n+4). Alternatively, as... Figure 5B As shown, in the second time-domain transmission, there are no DMRS on either of the two OFDM symbols occupied by the PBCH (i.e., OFDM symbol n+2 and OFDM symbol n+4). When the number of frequency domain resources of DMRS used on the symbols occupied by the PBCH is different, in order to save DMRS overhead, as follows... Figure 5C As shown, a significant amount of frequency domain resources occupied by DMRS can exist on the two OFDM symbols (i.e., OFDM symbol 2 and OFDM symbol 4) occupied by PBCH in the first time-domain transmission, for example... Figure 5C Of the eight frequency domain resources shown, a smaller number of frequency domain resources are occupied by DMRS, specifically the two OFDM symbols (OFDM symbol n+2 and OFDM symbol n+4) occupied by PBCH in the second time domain transmission. Figure 5C The four frequency domain resources. Of course, the RE offset of the DMRS on the OFDM symbols (i.e., OFDM symbol 1, OFDM symbol 2, OFDM symbol 3, OFDM symbol 4, OFDM symbol n+1, OFDM symbol n+2, OFDM symbol n+3, and OFDM symbol n+4) occupied by PBCH in these two time-domain transmissions can also be different, thus obtaining diversity gain in the frequency domain, such as... Figure 5D As shown; where n is a positive integer.

[0163] It should be noted that, since there are multiple OFDM symbols between the OFDM symbols occupied by the PBCH in the first time-domain transmission and the OFDM symbols occupied by the PBCH in the second time-domain transmission, therefore, Figures 5A to 5D The OFDM symbols occupied by the PBCH in the second time-domain transmission are illustrated using OFDM symbols n+1, n+2, n+3, and n+4. Figures 5A to 5DThe diagram illustrates a resource of a signal represented by a rectangle. This rectangle may correspond to one OFDM symbol and 12 RBs; however, the embodiments of this application do not limit the resources corresponding to this rectangle.

[0164] In some embodiments of this application, the above-mentioned different DMRS sequences in at least a portion of the first time units occupied by PBCH can also be understood as: the DMRS sequences in different first time units may be different in at least a portion of the first time units occupied by PBCH.

[0165] In some embodiments of this application, the sequence of DMRS differs at least a portion of the first time unit occupied by PBCH, and the sequence of DMRS is determined based on at least one of the following:

[0166] Index of the first time unit;

[0167] The time-domain repeat transmission ID corresponding to the time-domain transmission;

[0168] The time-domain retransmission group ID corresponding to the time-domain transmission;

[0169] The number of time-domain transfers;

[0170] The interval between two consecutive time-domain transmissions;

[0171] The synchronization grid of the first SSB;

[0172] The cell ID corresponding to the first SSB;

[0173] Index of the first SSB;

[0174] The index of the SSB group to which the first SSB belongs;

[0175] The type of the first SSB;

[0176] Synchronization signal in the first SSB;

[0177] The signal that triggers the first SSB set;

[0178] WUS;

[0179] PRACH.

[0180] In some examples, an initialization seed can be determined based on at least one of the following: the index of the first time unit, the time-domain retransmission ID corresponding to the time-domain transmission, the time-domain retransmission group ID corresponding to the time-domain transmission, the number of time-domain transmissions, the interval between two adjacent time-domain transmissions, the synchronization grid of the first SSB, the cell ID corresponding to the first SSB, the index of the first SSB, the index of the SSB group to which the first SSB belongs, the type of the first SSB, the synchronization signal in the first SSB, WUS, the signal that triggers the first SSB set, and PRACH. Then, the sequence of DMRS can be determined based on the initialization seed.

[0181] The relationship between at least one of the following can be agreed upon by the protocol or configured by the network-side device: the index of the first time unit, the time-domain retransmission ID corresponding to the time-domain transmission, the time-domain retransmission group ID corresponding to the time-domain transmission, the number of time-domain transmissions, the interval between two adjacent time-domain transmissions, the synchronization grid of the first SSB, the cell ID corresponding to the first SSB, the index of the first SSB, the index of the SSB group to which the first SSB belongs, the type of the first SSB, the synchronization signal in the first SSB, WUS, the signal that triggers the first SSB set, and PRACH, and the initialization seed. The terminal can then determine the initialization seed based on this relationship.

[0182] In another example, at least one of the following is associated with the DMRS sequence: the index of the first time unit, the time-domain retransmission ID corresponding to the time-domain transmission, the time-domain retransmission group ID corresponding to the time-domain transmission, the number of time-domain transmissions, the interval between two adjacent time-domain transmissions, the synchronization grid of the first SSB, the cell ID corresponding to the first SSB, the index of the first SSB, the index of the SSB group to which the first SSB belongs, the type of the first SSB, the synchronization signal in the first SSB, WUS, the signal that triggers the first SSB set, and PRACH. This allows the DMRS sequence to be determined directly.

[0183] The relationship between the sequence of at least one of the following can be agreed upon by the protocol or configured by the network-side device: the index of the first time unit, the time-domain retransmission ID corresponding to the time-domain transmission, the time-domain retransmission group ID corresponding to the time-domain transmission, the number of time-domain transmissions, the interval between two adjacent time-domain transmissions, the synchronization grid of the first SSB, the cell ID corresponding to the first SSB, the index of the first SSB, the index of the SSB group to which the first SSB belongs, the type of the first SSB, the synchronization signal in the first SSB, WUS, the signal that triggers the first SSB set, and PRACH, and the sequence of DMRS. Thus, the terminal can determine the sequence of DMRS based on this relationship.

[0184] Therefore, since the embodiments of this application specify the various contents for determining the DMRS sequence, the terminal can accurately determine the DMRS sequence based on these contents. Furthermore, the DMRS exists in at least a portion of the first time units occupied by the PBCH, and the DMRS sequence differs in different first time units within this portion, which helps suppress interference. Thus, the terminal can accurately receive the DMRS and use it to accurately decode the PBCH, thereby improving the demodulation performance of the PBCH.

[0185] In some embodiments of this application, when DMRS exists on at least a portion of the first time units occupied by PBCH, the at least a portion of the first time units are determined based on at least one of the following:

[0186] The time-domain repeat transmission ID corresponding to the time-domain transmission;

[0187] The time-domain retransmission group ID corresponding to the time-domain transmission;

[0188] The number of time-domain transfers;

[0189] The interval between two consecutive time-domain transmissions;

[0190] The temporal domain resources of the first SSB by default;

[0191] Master Information Block (MIB);

[0192] Layer 1 load;

[0193] System Information Block (SIB);

[0194] The synchronization grid of the first SSB;

[0195] The cell ID corresponding to the first SSB;

[0196] Index of the first SSB;

[0197] The index of the SSB group to which the first SSB belongs;

[0198] The type of the first SSB;

[0199] Synchronization signal in the first SSB;

[0200] The signal that triggers the first SSB set;

[0201] WUS;

[0202] PRACH.

[0203] It is understandable that at least part of the first time unit can be understood as: the at least part of the first time unit occupied by PBCH is also a time unit in which DMRS exists.

[0204] In some examples, the time-domain resources of the first SSB of the above-mentioned default agreement may include the default SSB transmission timing. Of course, the time-domain resources of the first SSB of the default agreement may also include other resources, which are not limited in this embodiment.

[0205] In some examples, the relationship between at least a portion of the first time unit and the time domain repeat transmission ID corresponding to the time domain transmission (and / or the time domain repeat transmission group ID corresponding to the time domain transmission, and / or the number of time domain transmissions, and / or the number of time domain transmissions, and / or the interval between two adjacent time domain transmissions, and / or the time domain resources of the first SSB agreed by default) can be agreed upon by protocol or configured by network-side devices. In this way, the terminal can accurately determine the at least a portion of the first time unit based on the relationship.

[0206] In some examples, the aforementioned SIB can be SIB1. Of course, the SIB can also be other SIBs, and this application embodiment does not limit this.

[0207] In some examples, the MIB (and / or layer-one load, and / or the synchronization grid of the first SSB, and / or the cell ID corresponding to the first SSB, and / or the index of the first SSB, and / or the index of the SSB group to which the first SSB belongs, and / or the type of the first SSB, and / or the synchronization signal in the first SSB, and / or WUS, and / or the signal that triggers the first SSB set, and / or PRACH) can be associated with the first SSB or used to determine the transmission of the SSB, so that at least a portion of the first time unit can be determined directly based on the MIB (and / or layer-one load, and / or the synchronization grid of the first SSB, and / or the cell ID corresponding to the first SSB, and / or the index of the first SSB, and / or the index of the SSB group to which the first SSB belongs, and / or the type of the first SSB, and / or the synchronization signal in the first SSB, and / or WUS, and / or the signal that triggers the first SSB set, and / or PRACH).

[0208] The association between the MIB (and / or Layer 1 load, and / or the synchronization grid of the first SSB, and / or the cell ID corresponding to the first SSB, and / or the index of the first SSB, and / or the index of the SSB group to which the first SSB belongs, and / or the type of the first SSB, and / or the synchronization signal in the first SSB, and / or WUS, and / or the signal that triggers the first SSB set, and / or PRACH) and the first SSB can be a protocol agreement or a network-side device configuration.

[0209] For example, the sequence of synchronization signals in the first SSB, or the sequence length, or the number of synchronization signals, or the interval between different synchronization signals may be related to the first SSB.

[0210] For example, for a terminal-triggered SSB (e.g., the first SSB set), the configuration of the DMRS of the first SSB set can be implicitly or explicitly indicated by WUS or PRACH, that is, the signal that triggers the first SSB set is associated with the first SSB.

[0211] Thus, since the embodiments of this application specify the specific content of the time unit in which DMRS exists in the first time unit occupied by PBCH, the terminal can determine the time unit in which DMRS exists in the first time unit occupied by PBCH based on the specific content. Therefore, the terminal can accurately receive the DMRS and use the DMRS to accurately decode PBCH, thereby improving the demodulation performance of PBCH.

[0212] In summary, since the embodiments of this application specify the conditions that the DMRS must satisfy when the first SSB set includes the DMRS, the terminal can accurately determine the DMRS based on these conditions, accurately receive the DMRS, and accurately decode the PBCH using the DMRS, thereby improving the demodulation performance of the PBCH.

[0213] Of course, in addition to time-domain retransmission of the first SSB, frequency-domain retransmission of the first SSB can also be performed to increase the channel estimation performance of DMRS or improve the reliability of PBCH transmission. The following will provide examples of the conditions that DMRS needs to meet in the scenario of frequency-domain transmission of the first SSB.

[0214] In some embodiments of this application, the first SSB set further includes a first SSB transmitted in the S frequency domain, where S is a positive integer greater than 1; wherein the first SSB set satisfies any one of the following: the first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and DMRS in the first SSB set; the sequence of the DMRS satisfies any one of the following:

[0215] The sequence of DMRS in S-frequency domain transmission is determined by the same first sequence;

[0216] The sequence of DMRS corresponding to each frequency domain transmission in the S-level frequency domain transmission is the same second sequence;

[0217] At least some of the frequency domain transmissions in the S-level frequency domain transmissions correspond to different third sequences in the DMRS sequence.

[0218] It should be noted that S-times frequency domain transmission can also be understood as S-times repeated frequency domain transmission. When S=1, it can be understood as no repeated frequency domain transmission, that is, transmission only once.

[0219] In some examples, the length of the first sequence described above can be greater than or equal to the length threshold. It can be understood that this first sequence can be a long sequence.

[0220] In some examples, the length of the DMRS sequence in the S-frequency domain transmission can be the same as the length of the first sequence.

[0221] In some examples, the length of the second sequence described above may be less than the length threshold. It can be understood that this second sequence can be a short sequence.

[0222] In some examples, the length of the DMRS sequence corresponding to each sub-frequency domain transmission can be the same as the length of a second sequence, and the length of the DMRS sequence in the S sub-frequency domain transmission can be the same as the length of S second sequences.

[0223] In some examples, the length of the DMRS sequence in the S frequency domain transmissions can be the same as the length of the S third sequences. The S third sequences are associated with the frequency domain repetition transmission ID and / or the frequency domain repetition transmission group ID corresponding to the frequency domain transmission; that is, the generation of the third sequences is determined at least based on the frequency domain repetition transmission ID and / or the frequency domain repetition transmission group ID corresponding to the frequency domain transmission.

[0224] Among these, at least some of the S third sequences may be different.

[0225] Thus, since the embodiments of this application specify the conditions that the DMRS sequence must meet, the terminal can accurately determine the DMRS sequence based on these conditions. Therefore, the terminal can accurately receive the DMRS and use the DMRS to accurately decode the PBCH, thereby improving the demodulation performance of the PBCH.

[0226] In some embodiments of this application, at least one of the DMRS sequence and the frequency domain resources occupied by the DMRS corresponding to each frequency domain transmission in the above-mentioned S-frequency domain transmissions is determined based on at least one of the following:

[0227] Frequency domain transmission corresponds to the frequency domain repeat transmission ID;

[0228] The frequency domain repetitive transmission group ID corresponding to the frequency domain transmission;

[0229] The number of frequency domain transmissions;

[0230] The interval between two adjacent frequency domain transmissions;

[0231] The frequency domain resources of the first SSB by default;

[0232] The synchronization grid of the first SSB;

[0233] The cell ID corresponding to the first SSB;

[0234] Index of the first SSB;

[0235] The index of the SSB group to which the first SSB belongs;

[0236] The type of the first SSB;

[0237] Synchronization signal in the first SSB;

[0238] The signal that triggers the first SSB set;

[0239] WUS;

[0240] PRACH.

[0241] In some examples, the association between the frequency domain repeat transmission ID (and / or the frequency domain repeat transmission group ID, and / or the number of frequency domain transmissions, and / or the interval between two adjacent frequency domain transmissions, and / or the frequency domain resources of the first SSB agreed upon by default) corresponding to the frequency domain transmission can be agreed upon by the protocol or configured by the network-side device, and at least one of the following: the sequence of DMRS and the frequency domain resources occupied by DMRS for each frequency domain transmission. In this way, based on the association and the frequency domain repeat transmission ID (and / or the frequency domain repeat transmission group ID, and / or the number of frequency domain transmissions, and / or the interval between two adjacent frequency domain transmissions, and / or the frequency domain resources of the first SSB agreed upon by default), at least one of the following: the sequence of DMRS and the frequency domain resources occupied by DMRS for each frequency domain transmission can be accurately determined.

[0242] For example, if at least one of the sequence of DMRS corresponding to each frequency domain transmission and the frequency domain resources occupied by DMRS is determined based on the index of the first SSB and / or the index of the SSB group to which the first SSB belongs, it is determined that at least a portion of the parameters of the sequence of DMRS corresponding to each frequency domain transmission include the index of the first SSB and / or the index of the SSB group to which the first SSB belongs for each frequency domain transmission.

[0243] For example, if at least one of the DMRS sequence and the frequency domain resources occupied by the DMRS in each frequency domain transmission is determined based on the type of the first SSB, and if the type of the first SSB in the S frequency domain transmissions is an on-demand SSB, then the sequence of the DMRS in the S frequency domain transmissions can be determined by the same first sequence. If the type of the first SSB in the S frequency domain transmissions is a non-on-demand SSB, then the sequence of the DMRS corresponding to each frequency domain transmission in the S frequency domain transmissions is the same second sequence.

[0244] For example, if at least one of the DMRS sequence and the frequency domain resources occupied by the DMRS in each frequency domain transmission is determined based on the type of the first SSB, then if the type of the first SSB in the S frequency domain transmissions is a first-level SSB, the sequence of the DMRS in the S frequency domain transmissions can be determined by the same first sequence. If the type of the first SSB in the S frequency domain transmissions is a second-level SSB, then the sequence of the DMRS corresponding to each frequency domain transmission in the S frequency domain transmissions is the same second sequence.

[0245] In some examples, where at least one of the sequence of DMRS and the frequency domain resources occupied by DMRS for each frequency domain transmission in S frequency domain transmissions is determined based on a synchronization signal (and / or WUS, and / or the signal that triggers the first set of SSBs, and / or PRACH) in the first SSB, the synchronization signal (and / or WUS, and / or the signal that triggers the first set of SSBs, and / or PRACH) may explicitly or implicitly indicate at least one of the sequence of DMRS and the frequency domain resources occupied by DMRS for each frequency domain transmission.

[0246] Thus, since the embodiments of this application specify the contents required to determine at least one of the DMRS sequence and the frequency domain resources occupied by the DMRS for each frequency domain transmission, on the one hand, the terminal can accurately determine at least one of the DMRS sequence and the frequency domain resources occupied by the DMRS for each frequency domain transmission based on these contents, and therefore the terminal can accurately receive the DMRS; on the other hand, it can further suppress PBCH interference between neighboring cells, thereby improving the demodulation performance of PBCH.

[0247] In some embodiments of this application, the frequency domain resources occupied by the DMRS can be related to the frequency domain transmission sequence number of the first SSB. For example, the resource sequence number of a first SSB corresponding to a different resource sequence number in the frequency domain can be used to determine the location of the frequency domain resources occupied by the DMRS.

[0248] It should be noted that when the first SSB set also includes the first SSB with S frequency domain transmissions, the offset of the frequency domain resources occupied by DMRS can be different on different frequency domain transmissions. For details, please refer to the specific description in the above embodiments. The embodiments of this application will not be repeated here.

[0249] In some embodiments of this application, the aforementioned first SSB set satisfies any one of the following: the first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and the DMRS in the first SSB set; the overlap of the PBCH in the first SSB set with at least one of the synchronization signal and the DMRS in the first SSB set includes at least one of the following:

[0250] PBCH and DMRS may completely or partially overlap;

[0251] The PBCH completely or partially overlaps with the synchronization signal.

[0252] In some embodiments of this application, the overlap between the PBCH and DMRS portions includes at least one of the following:

[0253] PBCH and DMRS partially overlap in the time domain;

[0254] PBCH and DMRS partially overlap in the frequency domain.

[0255] For example, assuming that the partial overlap between PBCH and DMRS includes partial overlap in the time domain and partial overlap in the frequency domain, and the first time unit occupied by PBCH includes 2 OFDM symbols, then the frequency domain resources occupied by PBCH and DMRS completely or partially overlap in the first OFDM symbol, and there is no DMRS in the second OFDM symbol.

[0256] Thus, since the embodiments of this application specify the various conditions that must be met for the partial overlap of PBCH and DMRS, the terminal can accurately determine the situation of partial overlap of PBCH and DMRS based on these conditions. Therefore, the terminal can accurately receive PBCH and DMRS.

[0257] In some embodiments of this application, the PBCH and DMRS completely overlap, and the DMRS satisfies at least one of the following:

[0258] The frequency domain resources occupied by DMRS are the same as those occupied by PBCH;

[0259] The frequency domain resources occupied by DMRS are not offset relative to the frequency domain resources occupied by PBCH;

[0260] The frequency domain resources occupied by DMRS or the offset of the occupied frequency domain resources are independent of the cell ID corresponding to the first SSB;

[0261] The sequence of DMRS is mapped starting from the first or last frequency domain resource occupied by PBCH.

[0262] In some examples, the frequency domain offset mentioned above can be an RE offset.

[0263] Thus, since the embodiments of this application specify the conditions that the DMRS must meet when the PBCH and DMRS completely overlap, the terminal can accurately determine the PBCH and DMRS based on these conditions, and therefore, the terminal can accurately receive the PBCH and DMRS.

[0264] In some embodiments of this application, the PBCH and DMRS completely or partially overlap, and the generation, mapping, or scrambling method of the DMRS sequence is related to at least one of the following:

[0265] The carrier ID corresponding to the first SSB;

[0266] The Transmitter / Receiver Point (TRP) corresponding to the first SSB;

[0267] The TRP group corresponding to the first SSB;

[0268] The synchronization grid of the first SSB;

[0269] The cell ID corresponding to the first SSB;

[0270] Index of the first SSB;

[0271] The index of the SSB group to which the first SSB belongs;

[0272] The type of the first SSB;

[0273] Synchronization signal in the first SSB;

[0274] The signal that triggers the first SSB set;

[0275] WUS;

[0276] PRACH.

[0277] In some examples, the association between the carrier ID (and / or the transmit / receive point TRP, and / or the TRP group, and / or the synchronization grid, and / or the cell ID, and / or the index, and / or the index, and / or the SSB group, and / or the type) of the first SSB and the generation, mapping, or scrambling method of the DMRS sequence can be agreed upon by the protocol or configured by the network-side equipment. In this way, the terminal can accurately determine the generation, mapping, or scrambling method of the DMRS sequence based on the association and the carrier ID (and / or the TRP, and / or the TRP group, and / or the synchronization grid, and / or the cell ID, and / or the index, and / or the index, and / or the SSB group, and / or the type) of the first SSB.

[0278] In some examples, where the generation, mapping, or scrambling of the DMRS sequence is related to a synchronization signal (and / or WUS, and / or the signal that triggers the first set of SSBs, and / or PRACH) in the first SSB, the generation, mapping, or scrambling of the DMRS sequence can be explicitly or implicitly indicated by the synchronization signal (and / or WUS, and / or the signal that triggers the first set of SSBs, and / or PRACH).

[0279] It is understandable that, since the generation, mapping, or scrambling method of the DMRS sequence can be related to the carrier ID corresponding to the first SSB (and / or the Transmit / Receive Point (TRP) corresponding to the first SSB, and / or the TRP group corresponding to the first SSB, and / or the synchronization grid of the first SSB, and / or the cell ID corresponding to the first SSB, and / or the index of the first SSB, and / or the index of the SSB group to which the first SSB belongs, and / or the type of the first SSB, and / or the synchronization signal in the first SSB, and / or WUS, and / or the signal that triggers the first SSB set, and / or PRACH), interference between DMRS corresponding to neighboring cells and / or adjacent SSBs and / or adjacent carriers can be suppressed by using a specific sequence or sequence mapping or scrambling and taking advantage of its low cross-correlation.

[0280] Thus, since the embodiments of this application specify at least one parameter related to the generation, mapping or scrambling method of the DMRS sequence, the terminal can accurately determine the DMRS sequence based on the at least one parameter, accurately receive the DMRS, and demodulate the DMRS. Therefore, the terminal can use the DMRS to accurately decode the PBCH, thereby improving the demodulation performance of the PBCH.

[0281] For example, such as Figure 6 As shown, the first SSB set includes PSS, PBCH, SSS and DMRS, wherein PBCH and DMRS completely overlap.

[0282] It should be noted that, Figure 6 The DMRS is illustrated in shaded areas.

[0283] When the PBCH and DMRS partially overlap in the frequency domain, designing a more suitable DMRS pattern to improve the performance of DMRS channel estimation while reducing interference with the PBCH is particularly important. Different DMRS patterns, or different overlapping patterns of DMRS and PBCH, may produce different effects. Examples will be provided below.

[0284] In some embodiments of this application, the PBCH and DMRS partially overlap in the frequency domain, and the DMRS satisfies at least one of the following:

[0285] DMRS is mapped using a predefined comb structure;

[0286] DMRS maps M consecutive first frequency domain resource elements as a basic unit, with each basic unit separated by at least one first frequency domain resource element, where M is a positive integer greater than 1.

[0287] DMRS is mapped to the first P first frequency domain resource elements occupied by PBCH, where P is a positive integer;

[0288] DMRS is mapped to the last Q first frequency domain resource elements of the frequency domain resources occupied by PBCH, where Q is a positive integer.

[0289] In some examples, the predefined comb structure mentioned above can be comb-a, where a is a positive integer. Comb-a can be understood as the interval of a REs between two adjacent REs occupied by the DMRS. For example, a can be 2, meaning the DMRS can be mapped in the form of comb-2, occupying half of the total frequency domain resources of the PBCH in REs.

[0290] In some examples, the first frequency domain resource element can be any of the following: RE, subcarrier, carrier, etc. Of course, the first frequency domain resource element may also include other resource elements, which are not limited in this embodiment.

[0291] For example, the first frequency domain resource element is RE, M is 2, and DMRS maps two consecutive REs as a basic unit, with a gap of 2 REs between each basic unit.

[0292] In some examples, where the DMRS is mapped to the first P first frequency domain resource elements or the last Q first frequency domain resource elements occupied by the PBCH, it can be understood that the frequency domain resources occupied by the DMRS are continuous frequency domain resources and a subset of the total frequency domain resources of the PBCH.

[0293] Thus, since the embodiments of this application specify the various conditions that DMRS needs to meet when PBCH and DMRS partially overlap in the frequency domain, the terminal can accurately receive DMRS based on these conditions, thereby improving the performance of DMRS channel estimation.

[0294] For example, suppose the PBCH and DMRS partially overlap in the frequency domain, and the DMRS is mapped through a predefined comb structure, then as follows: Figure 7A As shown, the DMRS can be mapped using a comb-2 structure, meaning that the frequency domain resource units (e.g., REs) occupied by any two adjacent DMRSs are spaced two REs apart.

[0295] To illustrate further, suppose the PBCH and DMRS partially overlap in the frequency domain, and the DMRS satisfies the condition that the DMRS maps M consecutive first frequency domain resource elements as a basic unit, with each basic unit separated by at least one first frequency domain resource element. Then, as follows... Figure 7B As shown, the DMRS can be mapped using two consecutive REs as a basic unit, with each basic unit separated by two REs.

[0296] To illustrate further, suppose the PBCH and DMRS partially overlap in the frequency domain, and the DMRS satisfies the following conditions: the DMRS is mapped to the first P first frequency domain resource elements occupied by the PBCH, and the DMRS is mapped to the last Q first frequency domain resource elements occupied by the PBCH. Then, as follows... Figure 7C As shown, the DMRS can be mapped to the first 4 REs of the frequency domain resources occupied by the PBCH, and the last 4 REs of the frequency domain resources occupied by the PBCH.

[0297] It should be noted that, in Figures 7A to 7C The diagram illustrates a resource of a signal represented by a rectangle. This rectangle may correspond to one OFDM symbol and 12 RBs; however, the embodiments of this application do not limit the resources corresponding to this rectangle.

[0298] Of course, in order to control the interference between DMRS and PBCH, and at the same time ensure the channel estimation performance of DMRS, it is also necessary to agree on the power allocation between the two, which will be illustrated with examples below.

[0299] In some embodiments of this application, the PBCH and DMRS completely or partially overlap; the transmission power ratio of the PBCH and DMRS is determined based on at least one of the following:

[0300] The synchronization grid of the first SSB;

[0301] The cell ID corresponding to the first SSB;

[0302] Index of the first SSB;

[0303] The index of the SSB group to which the first SSB belongs;

[0304] Describe the type of the first SSB;

[0305] Synchronization signal in the first SSB;

[0306] The signal that triggers the first SSB set;

[0307] MIB;

[0308] Layer 1 load;

[0309] Radio Resource Control (RRC) signaling for non-serving cells;

[0310] Media access control MAC signaling for non-serving cells;

[0311] Downlink Control Information (DCI) signaling for non-serving cells

[0312] WUS;

[0313] PRACH.

[0314] In some examples, the predefined ratio can be 8:2. Of course, the ratio can also be other values, and this application does not limit this.

[0315] In some examples, the association between the TRP (and / or the TRP group corresponding to the first SSB) and the transmission power ratio of PBCH and DMRS can be agreed upon by the protocol or configured by the network-side device. In this way, the terminal can accurately determine the transmission power ratio of PBCH and DMRS based on the association and the TRP (and / or the TRP group corresponding to the first SSB).

[0316] In some examples, the aforementioned MIB can be information carried by the PBCH, which can explicitly or implicitly indicate the transmission power ratio of the PBCH and DMRS. It is understood that because the PBCH and DMRS completely or partially overlap, the overhead of the DMRS can be reduced, allowing the MIB to carry more information and thus indicate the transmission power ratio of the PBCH and DMRS.

[0317] In some examples, a specific bit can be introduced into the Layer 1 load above to indicate the index of the first SSB, allowing the terminal to determine the transmission power ratio of the PBCH and DMRS based on the index of the first SSB. For example, the association between the index of the first SSB and the transmission power ratio of the PBCH and DMRS can be agreed upon by protocol or configured by the network-side device, allowing the terminal to accurately determine the transmission power ratio of the PBCH and DMRS based on this association and the index of the first SSB.

[0318] In some examples, the aforementioned RRC signaling (and / or MAC signaling, and / or DCI signaling) may explicitly or implicitly indicate the transmission power ratio of PBCH and DMRS.

[0319] In some examples, the synchronization signal in the first SSB (and / or WUS, and / or the signal that triggers the first SSB set, and / or PRACH) may explicitly or implicitly indicate the transmission power ratio of PBCH and DMRS.

[0320] Thus, since the embodiments of this application specify various parameters for determining the transmission power ratio of PBCH and DMRS, the terminal can accurately determine the transmission power ratio of PBCH and DMRS based on these parameters. Therefore, the terminal can reasonably allocate the power of PBCH and DMRS, thereby ensuring both the channel estimation effect of DMRS and the demodulation performance of PBCH.

[0321] In some embodiments of this application, when the PBCH and the synchronization signal completely or partially overlap, at least two of the PBCH, the PSS in the synchronization signal, and the SSS in the synchronization signal satisfy at least one of the following:

[0322] PBCH and PSS may completely or partially overlap;

[0323] PBCH and SSS completely or partially overlap;

[0324] PSS and SSS may completely or partially overlap.

[0325] It should be noted that "overlap" in this example can be complete overlap or partial overlap. When there is complete overlap, the PSS and / or SSS have the same frequency domain resource length as the PBCH; when there is partial overlap, the length of the PSS and / or SSS is less than the frequency domain resource length of the PBCH, that is, it is a subset of the total frequency domain resources of the PBCH.

[0326] In some examples, where the PBCH and PSS completely or partially overlap and / or the PBCH and SSS completely or partially overlap, that is, where the PSS and SSS do not overlap, there may be at least one temporal resource unit between the PSS and SSS.

[0327] The time-domain resource unit can be any of the following: OFDM symbol, time slot, subframe, frame, millisecond, etc.

[0328] For example, there can be at least one OFDM symbol between PSS and SSS. If there is one OFDM symbol between PSS and SSS, it can be understood that PSS and SSS are adjacent.

[0329] It is understandable that, in cases where PBCH and PSS completely or partially overlap, and / or where PBCH and SSS completely or partially overlap, and / or where PSS and SSS completely or partially overlap, the amount of temporal resources occupied by the first SSB set can be further reduced.

[0330] Thus, since the embodiments of this application specify the conditions that at least one of the PBCH, the PSS in the synchronization signal, and the SSS in the synchronization signal must satisfy when the PBCH and the synchronization signal completely or partially overlap, the terminal can accurately determine the overlap between the PBCH, PSS, and SSS based on these conditions. Therefore, the terminal can accurately receive the PBCH, PSS, and SSS.

[0331] For example, such as Figure 8A As shown, the PSS can overlap with the PBCH on the first OFDM symbol occupied by the PBCH, and the SSS can overlap with the PBCH on the second OFDM symbol occupied by the PBCH. Alternatively, as... Figure 8B As shown, the SSS can overlap with the PBCH on the second OFDM symbol occupied by the PBCH, while the PSS does not overlap with the PBCH.

[0332] It should be noted that, in Figure 8A and Figure 8B The diagram illustrates a resource of a signal represented by a rectangle. This rectangle may correspond to one OFDM symbol and 12 RBs; however, the embodiments of this application do not limit the resources corresponding to this rectangle.

[0333] In some embodiments of this application, the transmission power ratio between PSS and SSS varies depending on the situation. When PSS and SSS overlap with PBCH respectively, in addition to the transmission power allocation between PSS and PBCH, and between SSS and PBCH, the transmission power ratio between PSS and SSS can also be designed, for example, predefined as a first power ratio. When PSS does not overlap with PBCH, but SSS overlaps with PBCH, in addition to the transmission power allocation between SSS and PBCH, the transmission power ratio between PSS and SSS can also be further designed, for example, predefined as a second power ratio. For example, if the transmission power ratio between SSS and PBCH is P1:P2, and the power of PSS is P3, then the ratio of PSS to SSS is P1:P3. Similarly, when SSS does not overlap with PBCH, but PSS overlaps with PBCH, the situation is similar and will not be elaborated here. When PSS, SSS, and PBCH all overlap, the transmission power of the three also needs to be allocated.

[0334] In some embodiments of this application, where the PBCH overlaps with at least a portion of the DMRS and synchronization signal, the transmission power of the PBCH satisfies any of the following:

[0335] The transmission power corresponding to the first resource is the same as that corresponding to the second resource.

[0336] The transmission power corresponding to the first resource is different from that corresponding to the second resource.

[0337] In this embodiment of the application, the first resource is a resource in the PBCH that overlaps with at least one portion of the DMRS and the synchronization signal, and the second resource is a resource in the PBCH that does not overlap with at least one portion of the DMRS and the synchronization signal.

[0338] For example, assuming the first resource is the resource in the PBCH that overlaps with the DMRS, when the transmission power corresponding to the first resource and the transmission power corresponding to the second resource are different, the transmission power of the DMRS corresponding to the first resource can share the total transmission power P with the transmission power of the PBCH, while the transmission power of the PBCH corresponding to the second resource can exclusively enjoy the total transmission power.

[0339] Therefore, since the embodiments of this application specify that the transmission power corresponding to the first resource and the transmission power corresponding to the second resource can be different, the transmission signal-noise ratio (SNR) of the PBCH can be significantly improved. Alternatively, since the embodiments of this application specify that the transmission power corresponding to the first resource and the transmission power corresponding to the second resource can be the same, the transmission power of the PBCH is uniform, which can help simplify the complexity of the network-side device sending the PBCH and the complexity of the terminal receiving the PBCH.

[0340] As can be seen from the above, since the PBCH in the first SSB set can completely overlap with the DMRS in the first SSB set, instead of being multiplexed through frequency division multiplexing (FDM) as is common in related technologies, the number of PBCH resources in the first SSB set can be increased. This allows the PBCH to carry a larger payload of information, and the DMRS occupies more resources and has a longer sequence. Consequently, more resources can be used when performing channel estimation based on the DMRS, which is beneficial for channel estimation. Alternatively, since the PBCH in the first SSB set can partially overlap with the DMRS in the first SSB set, the interference between the PBCH and DMRS can be reduced while increasing the number of PBCH resources in the first SSB set. And / or, since the PBCH in the first SSB set can completely overlap with the synchronization signal in the first SSB set, instead of not overlapping at all as in related technologies, the amount of resources occupied by the first SSB set can be reduced, thereby improving resource utilization; or, since the PBCH in the first SSB set can partially overlap with the synchronization signal in the first SSB set, the interference between the PBCH and the synchronization signal can be reduced while increasing the amount of PBCH resources in the first SSB set.

[0341] In some embodiments of this application, if the PBCH overlaps with at least one of the synchronization signal and DMRS in the first SSB set, the terminal may, after receiving the first SSB set, process the first SSB in the first SSB set through an interference cancellation receiving algorithm or an artificial intelligence (AI) / machine learning (ML) model to eliminate the interference between the PBCH and the synchronization signal and / or DMRS.

[0342] Example 2: The first SSB in the first SSB set does not include DMRS.

[0343] For narrowband SSB access scenarios, such as the initial access of IoT devices, the corresponding bandwidth may be very small (e.g., 3MHz). In this case, the reduction in the overall bandwidth of the SSB necessitates a design change in the SSB structure. For example, since the bandwidth of the PBCH is also reduced, channel estimation and demodulation of the PBCH can be performed using synchronization sequences (e.g., PSS and SSS). This eliminates the need for an additional DMRS, thereby increasing the PBCH TB size or reducing the code rate and modulation order to improve PBCH reliability.

[0344] Below is an example of an SSB structure that does not include DMRS, such as Figure 9 As shown, the bandwidth of PBCH is close to that of PSS / SSS, thus allowing channel estimation of PBCH based on PSS / SSS. It can be understood that the first SSBs in the R time-domain transmissions included in the first SSB set do not include DMRS.

[0345] However, when the DMRS is not present in the SSB, the issues of how to indicate the index information of the first SSB and the half-frame number need to be further resolved.

[0346] In some embodiments of this application, the first SSB in the aforementioned first SSB set does not include DMRS; wherein, the half-frame number and at least part of the index information of the first SSB in the first SSB set are indicated or determined based on at least one of the following:

[0347] MIB;

[0348] Layer 1 load;

[0349] WUS;

[0350] The signal that triggers the first SSB set;

[0351] RRC signaling for non-serving cells;

[0352] MAC signaling of non-serving cells;

[0353] DCI signaling for non-serving cells;

[0354] The first relevant information for the first SSB.

[0355] In some examples, the MIB (and / or Layer 1 load, and / or WUS, and / or signal that triggers the first SSB set, and / or RRC signaling, and / or MAC signaling, and / or DCI signaling) may explicitly or implicitly indicate at least part of the index information of the half-frame number and the first SSB in the first SSB set.

[0356] In some embodiments of this application, the aforementioned first relevant information includes at least one of the following:

[0357] Frequency domain offset of the first SSB;

[0358] The starting frequency domain position of the PSS in the synchronization signal;

[0359] The starting frequency domain position of the SSS in the synchronization signal;

[0360] The center frequency domain position of the PSS in the synchronization signal;

[0361] The center frequency domain location of the SSS in the synchronization signal;

[0362] The frequency domain spacing between PSS and PBCH in the synchronization signal;

[0363] The frequency domain spacing between SSS and PBCH in the synchronization signal;

[0364] The frequency domain spacing between the PSS and SSS in the synchronization signal;

[0365] The time-domain interval between PSS and PBCH in the synchronization signal;

[0366] The time-domain interval between SSS and PBCH in the synchronization signal;

[0367] The time-domain interval between the PSS and SSS in the synchronization signal;

[0368] The power difference between the PSS and PBCH in the synchronization signal;

[0369] The power difference between the SSS and PBCH in the synchronization signal;

[0370] The power difference between the PSS and SSS in the synchronization signal;

[0371] Scrambling code for PBCH;

[0372] The repeat transmission mode or mapping method of PBCH.

[0373] In some examples, the frequency domain offset of the first SSB can be an RE offset. Of course, the frequency domain offset can also be other offsets, and this application embodiment does not limit this.

[0374] In some examples, the aforementioned starting frequency position can be the position of the starting frequency domain resource element, which can be any of the following: RE, subcarrier, carrier.

[0375] In some examples, the frequency domain spacing between the PSS and PBCH in the above synchronization signal may include the RE offset between the lowest frequencies of the PSS and PBCH.

[0376] In some examples, the frequency domain spacing between the SSS and PBCH in the above synchronization signal may include the RE offset between the lowest frequencies of the SSS and PBCH.

[0377] In some examples, the frequency domain spacing between the PSS and SSS in the above synchronization signal may include the RE offset between the lowest frequencies of the PSS and SSS.

[0378] In some examples, the time-domain interval between the PSS and PBCH can be the interval of a time-domain resource unit, which can be any of the following: OFDM symbol, slot, subframe, frame, millisecond, etc.

[0379] In some examples, the time-domain interval between the SSS and PBCH can be the interval of time-domain resource units.

[0380] In some examples, the time-domain interval between the PSS and SSS can be the interval of time-domain resource units.

[0381] In some examples, where the first relevant information includes the repeat transmission mode or mapping method of the PBCH, different indexes of the first SSB can correspond to different repeat transmission modes or mapping methods.

[0382] It should be noted that at least part of the index information of the first SSB in the first SSB set and the half-frame number mentioned above can be indicated by the above-mentioned multiple information. For example, at least part of the index information of the first SSB can be explicitly indicated by one type of information, and the half-frame number can be implicitly indicated by a first related information.

[0383] Thus, since the embodiments of this application specify the specific content included in the first relevant information, the terminal can accurately determine the half-frame number and at least part of the index information of the first SSB in the first SSB set based on the specific content.

[0384] In some embodiments of this application, DMRS is not included in the first SSB set if a first condition is met; wherein the first condition includes at least one of the following:

[0385] The time-domain interval between the PSS and SSS in the synchronization signal is greater than or equal to the first threshold.

[0386] PBCH is located between PSS and SSS in the synchronization signal.

[0387] Thus, since the embodiments of this application specify under what circumstances the first SSB in the first SSB set does not include DMRS, the terminal can directly determine that the first SSB does not include DMRS when the condition is met, without the need for additional indication from the network-side device, thereby saving indication overhead.

[0388] This application provides a method for transmitting a Single SSB (SSB). A terminal can receive a first SSB set, which includes R time-domain transmitted first SSBs. The first SSB set satisfies any of the following: the first SSB set includes a DMRS (Digital Modulation Signal), and the PBCH (Personalized Branch Message) in the first SSB set does not overlap with the DMRS; the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and the DMRS in the first SSB set; the first SSBs in the first SSB set do not include the DMRS. Since the first SSB set includes R time-domain transmitted first SSBs, when R is a positive integer greater than 1, the first SSB set can include multiple time-domain transmissions of the first SSBs. The terminal can improve the reception performance of the SSBs based on these multiple time-domain transmissions. And / or, since the first SSB set can satisfy the requirement that the first SSB set includes DMRS and that the PBCH in the first SSB set does not overlap with the DMRS, that is, the DMRS included in the first SSB set only needs to satisfy the requirement that it does not overlap with the PBCH, and does not need to occupy fixed resources in the time domain and frequency domain. For example, DMRS needs to exist on each symbol occupied by the PBCH. Therefore, in different scenarios, the resources occupied by the DMRS can be flexibly allocated according to the needs of different scenarios, so that the terminal can accurately receive the first SSB. Alternatively, since the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with the synchronization signal in the first SSB set, the overall resources occupied by the first SSB can be reduced, thus improving the system's resource utilization. And / or, since the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with the DMRS, the resources occupied by the PBCH are not limited by the resources occupied by the DMRS, thus increasing the amount of information the PBCH can carry. This allows the terminal to obtain more system information through the PBCH, thereby improving the performance of the terminal's communication-related actions. Alternatively, since the first SSB in the first SSB set does not include a DMRS, the resources occupied by the PBCH are not limited by the resources occupied by the DMRS, thus increasing the amount of information the PBCH can carry. This allows the terminal to obtain more system information through the PBCH, thereby improving the performance of the terminal's communication-related actions.

[0389] It is understood that the solutions in the embodiments of this application can effectively improve the transmission performance of SSB, such as increasing the amount of information in PBCH, improving the reliability of PBCH transmission, or saving the resource consumption overhead of SSB.

[0390] In some embodiments of this application, combined with Figure 3 ,like Figure 10 As shown, the SSB transmission method provided in this application embodiment may further include the following step 102.

[0391] Step 102: The terminal reports the first capability information through at least one of the following:

[0392] The first preamble associated with the first SSB;

[0393] Random access timing (RO) associated with the first SSB;

[0394] Uplink messages related to the random access procedure;

[0395] Uplink control signaling;

[0396] RRC signaling;

[0397] WUS signaling;

[0398] The signal that triggers the first SSB.

[0399] It should be noted that the execution order of steps 102 and 101 is not limited in this embodiment. Figure 10 The example shown is that the terminal executes step 101 first, and then step 102.

[0400] In this embodiment of the application, the first capability information corresponds to whether the terminal supports the first SSB.

[0401] In this embodiment, since the first SSB in Examples 1 and 2 above has a specific structure corresponding to different functions, different terminals may not necessarily support receiving the first SSB. Therefore, the terminal needs to report the first capability information to inform the network-side device whether it supports the first SSB. In particular, for at least one first SSB that overlaps with the synchronization signal and DMRS in the PBCH and the first SSB set, an AI / ML-based receiver may be required, thus placing higher demands on terminal processing.

[0402] In some examples, the aforementioned relevant uplink messages may include at least one of the following: messages Msg 3, MsgA, and Msg5.

[0403] For example, the terminal can report the first capability information in Msg3 (such as through the payload content of Msg3PUSCH, logical channel ID, DMRS resources, time and frequency resources, or one or more of these methods). Then the network side can indicate the measurement of the first SSB in Msg4 / MsgB, or by default, as long as the terminal reports the first capability information, the terminal will perform the measurement of the first SSB.

[0404] In some examples, when a terminal enters the connected state, it can report first capability information via RRC signaling. This can help optimize the configuration of network resources, such as turning off or on some on-demand SSBs.

[0405] Thus, since the terminal can report to the network-side device whether it supports the first SSB, the network-side device can send the SSBs that the terminal supports based on whether the terminal supports the first SSB. Therefore, the situation where the terminal cannot receive and decode the first SSB can be reduced.

[0406] In some embodiments of this application, combined with Figure 3 ,like Figure 11 As shown, the SSB transmission method provided in this application embodiment may further include the following step 103.

[0407] Step 103: The terminal determines the first SSB based on at least one of the following:

[0408] DMRS;

[0409] The time-frequency resources of the first SSB by default;

[0410] The synchronization grid of the first SSB;

[0411] The cell ID corresponding to the first SSB;

[0412] Index of the first SSB;

[0413] The index of the SSB group to which the first SSB belongs;

[0414] The type of the first SSB;

[0415] Synchronization signal in the first SSB;

[0416] The signal that triggers the first SSB set;

[0417] Second SSB;

[0418] MIB;

[0419] SIB;

[0420] Layer 1 load;

[0421] WUS;

[0422] PRACH.

[0423] It should be noted that the execution order of steps 103 and 101 is not limited in this embodiment. Figure 10 The example shown is that the terminal executes step 101 first, and then step 103.

[0424] In some examples, the terminal can determine whether the received SSB is the first SSB based on the frequency domain offset, time domain offset, or sequence of the DMRS.

[0425] In some examples, the terminal can determine that the received SSB is the first SSB if the time-frequency resources of the received SSB overlap with the time-frequency resources of the first SSB agreed upon by default.

[0426] For example, if a time slot for the first SSB transmission is agreed upon by default, the terminal can determine that the SSB received in that time slot is the first SSB if the time slot of the received SSB overlaps with the time slot of the first SSB transmission agreed upon by default.

[0427] For example, a default bandwidth range corresponding to the first SSB transmission is agreed upon, so that the terminal can determine whether it has received the first SSB based on the bandwidth range corresponding to the received SSB.

[0428] For example, the index of the first SSB corresponds to the index of a specific SSB, so the terminal can determine the first SSB based on the index of the first SSB.

[0429] For example, if the first SSB and the second SSB belong to different groups, the first SSB can be determined based on the index of the SSB group to which the first SSB belongs.

[0430] In some examples, to save energy for network-side devices, at least part of the first SSB can be an on-demand SSB.

[0431] In some examples, the second SSB mentioned above is an SSB different from the first SSB. This second SSB can be an SSB used in related technologies.

[0432] In some examples, the terminal can determine whether it has received the first SSB based on whether the configuration of the received SSB is the same as that of the second SSB.

[0433] In other examples, the terminal can determine the first SSB based on information carried by the second SSB. This information may include at least one of the following: the number of second SSBs, the period of the second SSBs, and the time-frequency resources occupied by the second SSBs.

[0434] For example, the number of second SSBs in a burst set can be used to determine whether to measure the first SSB.

[0435] In some examples, the first SSB may be explicitly or implicitly indicated in the aforementioned MIB and / or SIB (e.g., SIB1) and / or Layer 1 load, so that the terminal can determine the first SSB based on the indication.

[0436] In some examples, the terminal can determine the first SSB based on the sequence of synchronization signals in the first SSB, or the sequence of synchronization signals to initialize the corresponding cell ID, or the sequence length of the synchronization signals, or the number of synchronization signals, or the interval between different synchronization signals, etc.

[0437] In some examples, the WUS (and / or the signal that triggers the first SSB set, and / or the PRACH) can explicitly or implicitly indicate the first SSB, so that the terminal can determine the first SSB based on the WUS (and / or the signal that triggers the first SSB set, and / or the PRACH).

[0438] Thus, since the embodiments of this application specify various information required for the terminal to determine the first SSB, the terminal can accurately determine the first SSB based on this information. Therefore, the terminal can receive the first SSB in a corresponding manner, thereby ensuring that the terminal can accurately receive the first SSB.

[0439] In some embodiments of this application, combined with Figure 3 ,like Figure 12 As shown, the SSB transmission method provided in this application embodiment may further include the following step 104.

[0440] Step 104: The terminal measures the first parameter based on the first signal in the first SSB set.

[0441] In this embodiment of the application, the first signal includes at least one of the following:

[0442] Synchronization signal;

[0443] PBCH;

[0444] DMRS.

[0445] The first parameter mentioned above includes at least one of the following: reference signal received power (RSRP), reference signal received quality (RSRQ), signal-to-interference-plus-noise ratio (SINR), received signal strength indication (RSSI), and reference signal time difference (RSTD).

[0446] It should be noted that the execution order of steps 101 and 104 is not limited in this embodiment. Figure 12 The example in the text illustrates the process of the terminal executing step 101 first, followed by step 104.

[0447] In some examples, the terminal may use the measurement of the total received signal on the overlapping time-domain resources as the first parameter, or the measurement of the total received signal of the overlapping portion on the overlapping time-domain resources as the first parameter, or the measurement of the total received signal of the synchronization signal on the overlapping time-domain resources as the first parameter.

[0448] Thus, since the terminal can measure the first parameter based on the first signal, and will not be unable to measure the first parameter due to changes in the structure of the first SSB, the accuracy and success rate of the terminal's measurement can be improved.

[0449] Figure 13 A flowchart illustrating the SSB transmission method provided in an embodiment of this application is shown. Figure 13 As shown, the SSB transmission method provided in this application embodiment includes the following step 201.

[0450] Step 201: The network-side device sends the first SSB set.

[0451] In this embodiment of the application, the first SSB set includes a first SSB with R time-domain transmissions, where R is a positive integer, and the first SSB set satisfies any one of the following:

[0452] The first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with DMRS;

[0453] The first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signals and DMRS in the first SSB set;

[0454] DMRS is not included in the first SSB of the first SSB set.

[0455] The following example illustrates the specific conditions that a DMRS must satisfy when the first SSB set includes a DMRS.

[0456] Example 1: Include DMRS in the first SSB set.

[0457] In some embodiments of this application, the first SSB set satisfies any one of the following: the first SSB set includes a DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and the DMRS in the first SSB set; the DMRS satisfies at least one of the following:

[0458] DMRS exists on at least a portion of the first time unit occupied by PBCH;

[0459] The frequency domain resources occupied by DMRS differ at least in a portion of the first time unit occupied by PBCH;

[0460] The DMRS sequence differs in at least a portion of the first time unit occupied by PBCH.

[0461] In some embodiments of this application, the frequency domain resources occupied by DMRS differ in at least one of the following during at least a portion of the first time units occupied by PBCH:

[0462] The number of frequency domain resources occupied by DMRS varies in different first time units;

[0463] The offset of frequency domain resources occupied by DMRS varies in different first time units.

[0464] In some examples, the number of frequency domain resources occupied by the aforementioned DMRS varies, including at least one of the following:

[0465] The frequency domain resource density occupied by DMRS is different;

[0466] There are subset relationships among the frequency domain resources occupied by DMRS.

[0467] Thus, since the embodiments of this application specify various possible scenarios involving different numbers of frequency domain resources occupied by DMRS, the network-side device can accurately send a set of DMRS according to these scenarios, so that the terminal can accurately receive the DMRS. Therefore, the terminal can use the DMRS to accurately decode the PBCH, thereby improving the demodulation performance of the PBCH while saving the overhead of DMRS.

[0468] In some examples, the offset of the frequency domain resources occupied by the aforementioned DMRS is based on at least one of the following indications or determinations:

[0469] Index of the first time unit;

[0470] The time-domain retransmission identifier ID corresponding to the time-domain transmission;

[0471] The time-domain retransmission group ID corresponding to the time-domain transmission;

[0472] The number of time-domain transfers;

[0473] The interval between two consecutive time-domain transmissions;

[0474] The synchronization grid of the first SSB;

[0475] The cell ID corresponding to the first SSB;

[0476] Index of the first SSB;

[0477] The index of the SSB group to which the first SSB belongs;

[0478] The type of the first SSB;

[0479] Synchronization signal in the first SSB;

[0480] The signal that triggers the first SSB set;

[0481] WUS;

[0482] PRACH.

[0483] In some examples, the network-side device can determine the offset of the frequency domain resources occupied by the DMRS based on at least one of the following: the index of the first time unit, the time domain retransmission identifier ID corresponding to the time domain transmission, the time domain retransmission group ID corresponding to the time domain transmission, the number of time domain transmissions, the interval between two adjacent time domain transmissions, the synchronization grid of the first SSB, the cell ID corresponding to the first SSB, the index of the first SSB, the index of the SSB group to which the first SSB belongs, the type of the first SSB, the signal that triggers the first SSB set, and PRACH. Then, it can further determine the offset of the frequency domain resources occupied by the DMRS by using the index of the first time unit and the time domain retransmission identifier ID corresponding to the time domain transmission. The output identifier ID, the time-domain retransmission group ID corresponding to the time-domain transmission, the number of time-domain transmissions, the interval between two adjacent time-domain transmissions, the time-domain retransmission identifier ID corresponding to the time-domain transmission, the time-domain retransmission group ID corresponding to the time-domain transmission, the number of time-domain transmissions, the interval between two adjacent time-domain transmissions, the synchronization grid of the first SSB, the cell ID corresponding to the first SSB, the index of the first SSB, the index of the SSB group to which the first SSB belongs, the type of the first SSB, the synchronization signal in the first SSB, WUS, and at least one of PRACH indicates to the terminal the offset of the frequency domain resources occupied by DMRS.

[0484] Thus, since the embodiments of this application specify the specific information required for the network-side device to determine the offset of the frequency domain resources occupied by DMRS, the network-side device can accurately determine the offset of the frequency domain resources occupied by DMRS based on the specific information, and indicate the offset of the frequency domain resources occupied by DMRS to the terminal. Therefore, the terminal can accurately receive DMRS.

[0485] In some embodiments of this application, the sequence of DMRS differs in at least a portion of the first time units occupied by the PBCH, and the sequence of DMRS is determined based on at least one of the following indications:

[0486] Index of the first time unit;

[0487] The time-domain repeat transmission ID corresponding to the time-domain transmission;

[0488] The time-domain retransmission group ID corresponding to the time-domain transmission;

[0489] The number of time-domain transfers;

[0490] The interval between two consecutive time-domain transmissions;

[0491] The synchronization grid of the first SSB;

[0492] The cell ID corresponding to the first SSB;

[0493] Index of the first SSB;

[0494] The index of the SSB group to which the first SSB belongs;

[0495] Type of First SSB

[0496] Synchronization signal in the first SSB;

[0497] The signal that triggers the first SSB set;

[0498] WUS;

[0499] PRACH.

[0500] In some examples, the network-side device can determine the offset of the frequency domain resources occupied by the DMRS based on at least one of the following: the index of the first time unit, the time domain retransmission identifier ID corresponding to the time domain transmission, the time domain retransmission group ID corresponding to the time domain transmission, the number of time domain transmissions, the interval between two adjacent time domain transmissions, the synchronization grid of the first SSB, the cell ID corresponding to the first SSB, the index of the first SSB, the index of the SSB group to which the first SSB belongs, the type of the first SSB, the signal that triggers the first SSB set, and PRACH. And / or, through the index of the first time unit, the time domain retransmission identifier ID corresponding to the time domain transmission, the time domain retransmission group ID corresponding to the time domain transmission, the number of time domain transmissions, the interval between two adjacent time domain transmissions, the synchronization grid of the first SSB, the cell ID corresponding to the first SSB, the index of the first SSB, the index of the SSB group to which the first SSB belongs, the type of the first SSB, the signal that triggers the first SSB set, and PRACH. The following information is provided to the terminal: the retransmission identifier ID, the time-domain retransmission group ID corresponding to the time-domain transmission, the number of time-domain transmissions, the interval between two adjacent time-domain transmissions, the synchronization grid of the first SSB, the cell ID corresponding to the first SSB, the index of the first SSB, the index of the SSB group to which the first SSB belongs, the type of the first SSB, the synchronization signal in the first SSB, WUS, and at least one of PRACH, indicating the offset of the frequency domain resources occupied by DMRS.

[0501] Thus, since the embodiments of this application specify the specific information required for the network-side device to determine the sequence of DMRS, the network-side device can accurately determine the sequence of DMRS based on this specific information and indicate the sequence of DMRS to the terminal, thereby enabling the terminal to accurately receive DMRS.

[0502] In some embodiments of this application, when DMRS exists on at least a portion of the first time units occupied by PBCH, at least a portion of the first time units are indicated or determined based on at least one of the following:

[0503] The time-domain repeat transmission ID corresponding to the time-domain transmission;

[0504] The time-domain retransmission group ID corresponding to the time-domain transmission;

[0505] The number of time-domain transfers;

[0506] The interval between two consecutive time-domain transmissions;

[0507] The temporal domain resources of the first SSB by default;

[0508] MIB;

[0509] Layer 1 load;

[0510] SIB;

[0511] The synchronization grid of the first SSB;

[0512] The cell ID corresponding to the first SSB;

[0513] Index of the first SSB;

[0514] The index of the SSB group to which the first SSB belongs;

[0515] Type of First SSB

[0516] Synchronization signal in the first SSB;

[0517] The signal that triggers the first SSB set;

[0518] WUS;

[0519] PRACH.

[0520] In some examples, the network-side device can determine the existence of at least a portion of the first time unit based on at least one of the following: the time-domain retransmission identifier ID corresponding to the time-domain transmission, the time-domain retransmission group ID corresponding to the time-domain transmission, the number of time-domain transmissions, the interval between two adjacent time-domain transmissions, the time-domain resources of the first SSB according to the default agreement, the synchronization grid of the first SSB, the cell ID corresponding to the first SSB, the index of the first SSB, the index of the SSB group to which the first SSB belongs, the type of the first SSB, the signal that triggers the first SSB set, and PRACH. Alternatively, it can indicate the at least portion of the first time unit to the terminal via at least one of the following: the time-domain retransmission ID corresponding to the time-domain transmission, the time-domain retransmission group ID corresponding to the time-domain transmission, the number of time-domain transmissions, the interval between two adjacent time-domain transmissions, the time-domain resources of the first SSB according to the default agreement, MIB, Layer 1 load, SIB, the synchronization grid of the first SSB, the cell ID corresponding to the first SSB, the index of the first SSB, the index of the SSB group to which the first SSB belongs, the type of the first SSB, the synchronization signal in the first SSB, WUS, and PRACH.

[0521] Thus, since the embodiments of this application specify the specific information required for the network-side device to determine the existence of at least a portion of the first time unit of DMRS, the network-side device can accurately determine the at least a portion of the first time unit based on the specific information and indicate the at least a portion of the first time unit to the terminal. Therefore, the terminal can accurately receive DMRS.

[0522] In some embodiments of this application, the first SSB set further includes a first SSB transmitted in the S frequency domain, where S is a positive integer greater than 1; wherein the first SSB set satisfies any one of the following: the first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and DMRS in the first SSB set; the sequence of the DMRS satisfies any one of the following:

[0523] The sequence of DMRS in S-frequency domain transmission is determined by the same first sequence;

[0524] The sequence of DMRS corresponding to each frequency domain transmission in the S-level frequency domain transmission is the same second sequence;

[0525] At least some of the frequency domain transmissions in the S-level frequency domain transmissions correspond to different third sequences in the DMRS sequence.

[0526] Thus, since the embodiments of this application specify the conditions that the DMRS sequence must meet, the network-side device can accurately send the DMRS according to these conditions, so that the terminal can accurately receive the DMRS. Therefore, the terminal can use the DMRS to accurately decode the PBCH, thereby improving the demodulation performance of the PBCH.

[0527] In some embodiments of this application, at least one of the DMRS sequence and the frequency domain resources occupied by the DMRS corresponding to each frequency domain transmission in the above-described S frequency domain transmissions is indicated or determined based on at least one of the following:

[0528] Frequency domain transmission corresponds to the frequency domain repeat transmission ID;

[0529] Frequency domain transmission group ID corresponding to frequency domain transmission;

[0530] The number of frequency domain transmissions;

[0531] The interval between two adjacent frequency domain transmissions;

[0532] The frequency domain resources of the first SSB by default;

[0533] The synchronization grid of the first SSB;

[0534] The cell ID corresponding to the first SSB;

[0535] Index of the first SSB;

[0536] The index of the SSB group to which the first SSB belongs;

[0537] Type of First SSB

[0538] Synchronization signal in the first SSB;

[0539] The signal that triggers the first SSB set;

[0540] WUS;

[0541] PRACH.

[0542] In some examples, the network-side device may determine at least one of the following based on at least one of the following: frequency domain repetition identifier ID corresponding to the frequency domain transmission, frequency domain repetition group ID corresponding to the frequency domain transmission, number of frequency domain transmissions, interval between two adjacent frequency domain transmissions, frequency domain resources of the first SSB according to the default agreement, synchronization grid of the first SSB, cell ID corresponding to the first SSB, index of the first SSB, index of the SSB group to which the first SSB belongs, type of the first SSB, signal triggering the first SSB set, and PRACH, and / or indicate the at least part of the first time unit to the terminal through at least one of the following: frequency domain repetition identifier ID corresponding to the frequency domain transmission, frequency domain repetition group ID corresponding to the frequency domain transmission, number of frequency domain transmissions, interval between two adjacent frequency domain transmissions, frequency domain resources of the first SSB according to the default agreement, synchronization grid of the first SSB, cell ID corresponding to the first SSB, index of the first SSB, index of the SSB group to which the first SSB belongs, type of the first SSB, synchronization signal in the first SSB, WUS, and PRACH.

[0543] Thus, since the embodiments of this application specify the specific content required to determine at least one of the DMRS sequence and the frequency domain resources occupied by the DMRS for each frequency domain transmission, the network-side device can accurately determine the DMRS sequence and the frequency domain resources occupied by the DMRS for each frequency domain transmission based on the specific content, and accurately send the DMRS. Therefore, the terminal can accurately receive the DMRS.

[0544] In some embodiments of this application, the aforementioned first SSB set satisfies any one of the following: the first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and DMRS in the first SSB set; the overlap of the PBCH in the first SSB set with at least one of the synchronization signal and DMRS in the first SSB set includes at least one of the following:

[0545] PBCH and DMRS may completely or partially overlap;

[0546] The PBCH completely or partially overlaps with the synchronization signal.

[0547] In some embodiments of this application, the overlap between the PBCH and DMRS portions includes at least one of the following:

[0548] PBCH and DMRS partially overlap in the time domain;

[0549] PBCH and DMRS partially overlap in the frequency domain.

[0550] Thus, since the embodiments of this application specify the various conditions that must be met for the partial overlap of PBCH and DMRS, the network-side device can accurately send PBCH and DMRS according to these conditions, and therefore the terminal can accurately receive PBCH and DMRS.

[0551] In some embodiments of this application, the PBCH and DMRS completely overlap, and the DMRS satisfies at least one of the following:

[0552] The frequency domain resources occupied by DMRS are the same as those occupied by PBCH;

[0553] The frequency domain resources occupied by DMRS are not offset relative to the frequency domain resources occupied by PBCH;

[0554] The frequency domain resources occupied by DMRS or the offset of the occupied frequency domain resources are independent of the cell ID corresponding to the first SSB;

[0555] The sequence of DMRS is mapped starting from the first or last frequency domain resource occupied by PBCH.

[0556] Thus, since the embodiments of this application specify the various conditions that DMRS must meet when PBCH and DMRS completely overlap, the network-side device can accurately send PBCH and DMRS according to these conditions, and therefore the terminal can accurately receive PBCH and DMRS.

[0557] In some embodiments of this application, the PBCH and DMRS completely or partially overlap, and the generation, mapping, or scrambling method of the DMRS sequence is related to at least one of the following:

[0558] The carrier ID corresponding to the first SSB;

[0559] The TRP corresponding to the first SSB;

[0560] The TRP group corresponding to the first SSB;

[0561] The synchronization grid of the first SSB;

[0562] The cell ID corresponding to the first SSB;

[0563] Index of the first SSB;

[0564] The index of the SSB group to which the first SSB belongs;

[0565] Type of First SSB

[0566] Synchronization signal in the first SSB;

[0567] The signal that triggers the first SSB set;

[0568] WUS;

[0569] PRACH.

[0570] Thus, since the embodiments of this application specify at least one parameter related to the generation, mapping or scrambling method of the DMRS sequence, the network-side device can accurately determine the DMRS sequence and accurately send the DMRS based on the at least one parameter. Therefore, the terminal can use the DMRS to accurately decode the PBCH, thereby improving the demodulation performance of the PBCH.

[0571] In some embodiments of this application, the PBCH and DMRS partially overlap in the frequency domain, and the DMRS satisfies at least one of the following:

[0572] DMRS is mapped using a predefined comb structure;

[0573] DMRS maps M consecutive first frequency domain resource elements as a basic unit, with each basic unit separated by at least one first frequency domain resource element, where M is a positive integer greater than 1.

[0574] DMRS is mapped to the first P first frequency domain resource elements occupied by PBCH, where P is a positive integer;

[0575] DMRS is mapped to the last Q first frequency domain resource elements of the frequency domain resources occupied by PBCH, where Q is a positive integer.

[0576] Thus, since the embodiments of this application specify the various conditions that DMRS must meet when PBCH and DMRS partially overlap in the frequency domain, the network-side device can accurately transmit DMRS according to these conditions. Therefore, the terminal can accurately receive DMRS, thereby improving the performance of DMRS channel estimation.

[0577] Of course, in order to control the interference between DMRS and PBCH, and at the same time ensure the channel estimation performance of DMRS, it is also necessary to agree on the power allocation between the two, which will be illustrated with examples below.

[0578] In some embodiments of this application, the PBCH and DMRS described above completely or partially overlap;

[0579] The transmission power ratio of PBCH and DMRS is based on at least one of the following indications or determinations:

[0580] Predefined ratio;

[0581] The TRP corresponding to the first SSB;

[0582] The TRP group corresponding to the first SSB;

[0583] The synchronization grid of the first SSB;

[0584] The cell ID corresponding to the first SSB;

[0585] Index of the first SSB;

[0586] The index of the SSB group to which the first SSB belongs;

[0587] The type of the first SSB;

[0588] Synchronization signal in the first SSB;

[0589] The signal that triggers the first SSB set;

[0590] MIB;

[0591] Layer 1 load;

[0592] RRC signaling for non-serving cells;

[0593] MAC signaling of non-serving cells;

[0594] DCI signaling of non-serving cells

[0595] WUS;

[0596] PRACH.

[0597] In some examples, the network-side device can determine the transmission power ratio of PBCH and DMRS based on at least one of the following: the TRP corresponding to the first SSB, the TRP group corresponding to the first SSB, the synchronization grid of the first SSB, the cell ID corresponding to the first SSB, the index of the first SSB, the index of the SSB group to which the first SSB belongs, the type of the first SSB, the signal that triggers the first SSB set, and PRACH; and / or, indicate the transmission power ratio of PBCH and DMRS to the terminal through at least one of the following: MIB, Layer 1 load, DCI signaling of the non-serving cell, the synchronization grid of the first SSB, the cell ID corresponding to the first SSB, the index of the first SSB, the index of the SSB group to which the first SSB belongs, the type of the first SSB, the synchronization signal in the first SSB, WUS, and PRACH.

[0598] Thus, since the embodiments of this application specify various parameters for determining the transmission power ratio of PBCH and DMRS, the network-side device can accurately determine the transmission power ratio of PBCH and DMRS based on these parameters. Therefore, the network-side device can reasonably allocate the power of PBCH and DMRS, thereby ensuring both the channel estimation effect of DMRS and the demodulation performance of PBCH.

[0599] In some embodiments of this application, when the PBCH and the synchronization signal completely or partially overlap, at least two of the PBCH, the PSS in the synchronization signal, and the SSS in the synchronization signal satisfy at least one of the following:

[0600] PBCH and PSS may completely or partially overlap;

[0601] PBCH and SSS completely or partially overlap;

[0602] PSS and SSS may completely or partially overlap.

[0603] Thus, since the embodiments of this application specify the conditions that at least one of the PBCH, the PSS in the synchronization signal, and the SSS in the synchronization signal must meet when the PBCH and the synchronization signal completely or partially overlap, the network-side device can accurately transmit the overlap between the PBCH, PSS, and SSS according to the conditions. Therefore, the terminal can accurately receive the PBCH, PSS, and SSS.

[0604] In some embodiments of this application, where the PBCH overlaps with at least a portion of the DMRS and synchronization signal, the transmission power of the PBCH satisfies any of the following:

[0605] The transmission power corresponding to the first resource is the same as that corresponding to the second resource.

[0606] The transmission power corresponding to the first resource is different from that corresponding to the second resource.

[0607] In this embodiment of the application, the first resource is a resource in the PBCH that overlaps with at least one portion of the DMRS and the synchronization signal, and the second resource is a resource in the PBCH that does not overlap with at least one portion of the DMRS and the synchronization signal.

[0608] Therefore, since the embodiments of this application specify that the transmission power corresponding to the first resource and the transmission power corresponding to the second resource can be different, the transmission signal-noise ratio (SNR) of the PBCH can be significantly improved. Alternatively, since the embodiments of this application specify that the transmission power corresponding to the first resource and the transmission power corresponding to the second resource can be the same, the transmission power of the PBCH is uniform, which can help simplify the complexity of the network-side device sending the PBCH and the complexity of the terminal receiving the PBCH.

[0609] As can be seen from the above, since the PBCH in the first SSB set can completely overlap with the DMRS in the first SSB set, instead of being multiplexed through frequency division multiplexing (FDM) as is common in related technologies, the number of PBCH resources in the first SSB set can be increased. This allows the PBCH to carry a larger payload of information, and the DMRS occupies more resources and has a longer sequence. Consequently, more resources can be used when performing channel estimation based on the DMRS, which is beneficial for channel estimation. Alternatively, since the PBCH in the first SSB set can partially overlap with the DMRS in the first SSB set, the interference between the PBCH and DMRS can be reduced while increasing the number of PBCH resources in the first SSB set. And / or, since the PBCH in the first SSB set can completely overlap with the synchronization signal in the first SSB set, instead of not overlapping at all as in related technologies, the amount of resources occupied by the first SSB set can be reduced, thereby improving resource utilization; or, since the PBCH in the first SSB set can partially overlap with the synchronization signal in the first SSB set, the interference between the PBCH and the synchronization signal can be reduced while increasing the amount of PBCH resources in the first SSB set.

[0610] Example 2: The first SSB in the first SSB set does not include DMRS.

[0611] In some embodiments of this application, the first SSB in the aforementioned first SSB set does not include DMRS; wherein, the half-frame number and at least part of the index information of the first SSB in the first SSB set are indicated or determined based on at least one of the following:

[0612] MIB;

[0613] Layer 1 load;

[0614] WUS;

[0615] The signal that triggers the first SSB set;

[0616] RRC signaling for non-serving cells;

[0617] MAC signaling of non-serving cells;

[0618] DCI signaling for non-serving cells;

[0619] The first relevant information for the first SSB.

[0620] In some embodiments of this application, the aforementioned first relevant information includes at least one of the following:

[0621] Frequency domain offset of the first SSB;

[0622] The starting frequency domain position of the PSS in the synchronization signal;

[0623] The starting frequency domain position of the SSS in the synchronization signal;

[0624] The center frequency domain position of the PSS in the synchronization signal;

[0625] The center frequency domain location of the SSS in the synchronization signal;

[0626] The frequency domain spacing between PSS and PBCH in the synchronization signal;

[0627] The frequency domain spacing between SSS and PBCH in the synchronization signal;

[0628] The frequency domain spacing between the PSS and SSS in the synchronization signal;

[0629] The time-domain interval between PSS and PBCH in the synchronization signal;

[0630] The time-domain interval between SSS and PBCH in the synchronization signal;

[0631] The time-domain interval between the PSS and SSS in the synchronization signal;

[0632] The power difference between the PSS and PBCH in the synchronization signal;

[0633] The power difference between the SSS and PBCH in the synchronization signal;

[0634] The power difference between the PSS and SSS in the synchronization signal;

[0635] Scrambling code for PBCH;

[0636] The repeat transmission mode or mapping method of PBCH.

[0637] Thus, since the specific content of the first relevant information is specified in the embodiments of this application, even if the network-side device does not send DMRS, the terminal can still accurately determine the half-frame number and at least part of the index information of the first SSB in the first SSB set based on the specific content. Therefore, the situation where the terminal cannot determine the half-frame number and the index information of the first SSB can be reduced.

[0638] In some embodiments of this application, DMRS is not included in the first SSB set if a first condition is met; wherein the first condition includes at least one of the following:

[0639] The time-domain interval between the PSS and SSS in the synchronization signal is greater than or equal to the first threshold.

[0640] PBCH is located between PSS and SSS in the synchronization signal.

[0641] Thus, since the embodiments of this application specify under what circumstances the first SSB in the first SSB set does not include DMRS, the network-side device can directly determine that the first SSB does not include DMRS when this condition is met, without having to give additional instructions to the terminal, thereby saving instruction overhead.

[0642] This application provides a method for transmitting a First SSB (Secondary Segment Bus). A network-side device can send a first SSB set, which includes R time-domain transmitted first SSBs. The first SSB set satisfies any of the following: the first SSB set includes a DMRS (Digital Modulation Signal), and the PBCH (Personalized Branch Chromatography) in the first SSB set does not overlap with the DMRS; the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and the DMRS in the first SSB set; or the first SSBs in the first SSB set do not include the DMRS. Since the first SSB set includes R time-domain transmitted first SSBs, when R is a positive integer greater than 1, the first SSB set can include multiple time-domain transmissions of the first SSBs. The terminal can improve the SSB reception performance based on these multiple time-domain transmissions of the first SSBs. And / or, since the first SSB set can satisfy the condition that the first SSB set includes DMRS and the PBCH in the first SSB set does not overlap with the DMRS, that is, the DMRS included in the first SSB set only needs to satisfy the condition that it does not overlap with the PBCH, without occupying fixed resources in the time and frequency domains. For example, DMRS needs to exist on each symbol of the PBCH. Therefore, in different scenarios, the resources occupied by the DMRS can be flexibly allocated according to the needs of different scenarios, so that the terminal can accurately receive the first SSB. Or, since the first SSB set can satisfy the condition that the first SSB set includes DMRS and the PBCH in the first SSB set overlaps with the synchronization signal in the first SSB set, the overall resources occupied by the first SSB can be reduced, thus improving the resource utilization of the system; and / or, since the first SSB set can satisfy the condition that the first SSB set includes DMRS and the PBCH in the first SSB set overlaps with the DMRS, the resources occupied by the PBCH are not limited by the resources occupied by the DMRS. Therefore, the amount of information that the PBCH can carry can be increased, so that the terminal can obtain more system information through the PBCH, thereby improving the performance of the terminal in communication-related behaviors. Alternatively, since the first SSB in the first SSB set does not include DMRS, the resources occupied by PBCH are not limited by the resources occupied by DMRS. Therefore, the amount of information that PBCH can carry can be increased, so that the terminal can obtain more system information through PBCH, thereby improving the performance of the terminal in communication-related activities.

[0643] In some embodiments of this application, combined with Figure 13 ,like Figure 14 As shown, the SSB transmission method provided in this application embodiment may further include the following step 202.

[0644] Step 202: The network-side device receives the first capability information through at least one of the following:

[0645] The first preamble associated with the first SSB;

[0646] RO associated with the first SSB;

[0647] Uplink messages related to the random access procedure;

[0648] Uplink control signaling;

[0649] RRC signaling;

[0650] WUS signaling;

[0651] The signal that triggers the first SSB.

[0652] In this embodiment of the application, the first capability information corresponds to whether the terminal supports the first SSB.

[0653] Therefore, since the network-side device can also obtain whether the terminal supports the first SSB, the network-side device can send the SSBs that the terminal supports based on whether the terminal supports the first SSB. Thus, the situation where the terminal cannot receive and decode the first SSB can be reduced.

[0654] The SSB transmission method provided in this application can be executed by an SSB transmission device. This application uses an SSB transmission device executing the SSB transmission method as an example to illustrate the SSB transmission device provided in this application.

[0655] This application provides a transmission device for an SSB (Service Serving Block). As an example, the transmission device for an SSB can be a communication device or a component within a communication device, such as a chip. The communication device can be a terminal, a network-side device, or a server, etc. Exemplarily, the terminal can be, but is not limited to, the type of terminal 11 listed above, and the network-side device can be, but is not limited to, the type of network-side device 12 listed above. This application does not impose specific limitations on these aspects.

[0656] The SSB transmission device includes a receiving module, a transmitting module, and a processing module. These modules can be implemented in software or hardware. When implemented in hardware, the processing module can be implemented by a processor. For example, the processor can include a general-purpose processor, a special-purpose processor, such as a Central Processing Unit (CPU), microprocessor, Digital Signal Processor (DSP), Artificial Intelligence (AI) processor, Graphics Processing Unit (GPU), Application Specific Integrated Circuit (ASIC), Network Processor (NP), Field Programmable Gate Array (FPGA), or other programmable logic devices, gate circuits, transistors, discrete hardware components, etc. The receiving and transmitting modules can be implemented by a communication interface, which can include one or more of the following: transceiver, pins, circuits, bus, radio frequency unit, etc.

[0657] Specifically, see Figure 15 When the SSB transmission device is a terminal or a component within a terminal, the SSB transmission device 300 includes a receiving module 301. The receiving module 301 is used to receive a first SSB set, which includes R time-domain transmitted first SSBs, where R is a positive integer. The first SSB set satisfies any of the following: the first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and DMRS in the first SSB set; the first SSBs in the first SSB set do not include DMRS.

[0658] This application provides an SSB transmission apparatus. Since the first SSB set includes a first SSB transmitted in the time domain R times, when R is a positive integer greater than 1, the first SSB set can include multiple first SSB time domain transmissions. The SSB transmission apparatus can improve the SSB reception performance based on these multiple first SSB time domain transmissions. And / or, since the first SSB set can satisfy the requirement of including a DMRS, and the PBCH and DMRS in the first SSB set do not overlap, that is, the DMRS included in the first SSB set only needs to satisfy the requirement of not overlapping with the PBCH, without occupying fixed resources in the time and frequency domains. For example, DMRS needs to exist on each symbol occupied by the PBCH. Therefore, in different scenarios, the resources occupied by the DMRS can be flexibly allocated according to the needs of different scenarios, so that the SSB transmission apparatus can accurately receive the first SSB. Alternatively, since the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with the synchronization signal in the first SSB set, the overall resources occupied by the first SSB can be reduced, thus improving the system's resource utilization. And / or, since the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with the DMRS, the resources occupied by the PBCH are not limited by the resources occupied by the DMRS, thus increasing the amount of information that the PBCH can carry. Therefore, the SSB transmission device can obtain more system information through the PBCH, thereby improving the performance of the SSB transmission device in communication-related activities. Alternatively, since the first SSB in the first SSB set does not include a DMRS, the resources occupied by the PBCH are not limited by the resources occupied by the DMRS, thus increasing the amount of information that the PBCH can carry. Therefore, the SSB transmission device can obtain more system information through the PBCH, thereby improving the performance of the SSB transmission device in communication-related activities.

[0659] In one possible implementation, the first SSB set satisfies any of the following: the first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and DMRS in the first SSB set; the DMRS satisfies at least one of the following: DMRS exists in at least a portion of the first time units occupied by the PBCH; the frequency domain resources occupied by the DMRS are different in at least a portion of the first time units occupied by the PBCH; the sequences of the DMRS are different in at least a portion of the first time units occupied by the PBCH.

[0660] In one possible implementation, the frequency domain resources occupied by DMRS differ in at least a portion of the first time units occupied by PBCH, including at least one of the following: the number of frequency domain resources occupied by DMRS differs in different first time units; the offset of the frequency domain resources occupied by DMRS differs in different first time units.

[0661] In one possible implementation, the different number of frequency domain resources occupied by the DMRS includes at least one of the following: the frequency domain resource densities occupied by the DMRS are different; there is a subset relationship between the frequency domain resources occupied by the DMRS.

[0662] In one possible implementation, the offset of the frequency domain resources occupied by DMRS is determined based on at least one of the following: the index of the first time unit; the time domain retransmission identifier ID corresponding to the time domain transmission; the time domain retransmission group ID corresponding to the time domain transmission; the number of time domain transmissions; the interval between two adjacent time domain transmissions; the synchronization grid of the first SSB; the cell ID corresponding to the first SSB; the index of the first SSB; the index of the SSB group to which the first SSB belongs; the type of the first SSB; the signal that triggers the first SSB set; WUS; PRACH.

[0663] In one possible implementation, the DMRS sequence differs on at least a portion of the first time units occupied by the PBCH. The DMRS sequence is determined based on at least one of the following: the index of the first time unit; the time-domain retransmission ID corresponding to the time-domain transmission; the time-domain retransmission group ID corresponding to the time-domain transmission; the number of time-domain transmissions; the interval between two adjacent time-domain transmissions; the synchronization grid of the first SSB; the cell ID corresponding to the first SSB; the index of the first SSB; the index of the SSB group to which the first SSB belongs; the type of the first SSB; the synchronization signal in the first SSB; the signal that triggers the first SSB set; WUS; PRACH.

[0664] In one possible implementation, when DMRS exists on at least a portion of the first time units occupied by PBCH, the at least a portion of the first time units are determined based on at least one of the following: the time-domain retransmission ID corresponding to the time-domain transmission; the time-domain retransmission group ID corresponding to the time-domain transmission; the number of time-domain transmissions; the interval between two adjacent time-domain transmissions; the time-domain resources of the first SSB according to the default agreement; MIB; Layer 1 load; SIB; the synchronization grid of the first SSB; the cell ID corresponding to the first SSB; the index of the first SSB; the index of the SSB group to which the first SSB belongs; the type of the first SSB; the synchronization signal in the first SSB; the signal that triggers the first SSB set; WUS; PRACH.

[0665] In one possible implementation, the first SSB set further includes a first SSB of S frequency domain transmissions, where S is a positive integer greater than 1; wherein the first SSB set satisfies any of the following: the first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and DMRS in the first SSB set; the sequence of DMRS satisfies any of the following: the sequence of DMRS in the S frequency domain transmissions is determined by the same first sequence; the sequence of DMRS corresponding to each frequency domain transmission in the S frequency domain transmissions is the same second sequence; the sequence of DMRS corresponding to at least some frequency domain transmissions in the S frequency domain transmissions is a different third sequence.

[0666] In one possible implementation, at least one of the following is determined based on at least one of the following: the frequency domain retransmission ID corresponding to each frequency domain transmission in the S frequency domain transmissions; the frequency domain retransmission group ID corresponding to the frequency domain transmission; the number of frequency domain transmissions; the interval between two adjacent frequency domain transmissions; the frequency domain resources of the first SSB by default agreement; the synchronization grid of the first SSB; the cell ID corresponding to the first SSB; the index of the first SSB; the index of the SSB group to which the first SSB belongs; the type of the first SSB; the synchronization signal in the first SSB; the signal that triggers the first SSB set; WUS; PRACH.

[0667] In one possible implementation, the first SSB set satisfies any of the following: the first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with DMRS; the first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and DMRS in the first SSB set; the overlap of the PBCH in the first SSB set with at least one of the synchronization signal and DMRS in the first SSB set includes at least one of the following: the PBCH completely overlaps or partially overlaps with DMRS; the PBCH completely overlaps or partially overlaps with the synchronization signal.

[0668] In one possible implementation, the PBCH and DMRS completely or partially overlap, and the generation, mapping, or scrambling method of the DMRS sequence is related to at least one of the following: the carrier ID corresponding to the first SSB; the TRP corresponding to the first SSB; the TRP group corresponding to the first SSB; the synchronization grid of the first SSB; the cell ID corresponding to the first SSB; the index of the first SSB; the index of the SSB group to which the first SSB belongs; the type of the first SSB; the synchronization signal in the first SSB; the signal that triggers the first SSB set; WUS; PRACH.

[0669] In one possible implementation, the PBCH and DMRS completely overlap, and the DMRS satisfies at least one of the following: the frequency domain resources occupied by the DMRS are the same as those occupied by the PBCH; there is no frequency domain offset between the frequency domain resources occupied by the DMRS and those occupied by the PBCH; the frequency domain resources occupied by the DMRS or the offset of the occupied frequency domain resources are independent of the cell ID corresponding to the first SSB; and the sequence of DMRS is mapped starting from the first or last frequency domain resource occupied by the PBCH.

[0670] In one possible implementation, partial overlap between PBCH and DMRS includes at least one of the following: partial overlap between PBCH and DMRS in the time domain; and partial overlap between PBCH and DMRS in the frequency domain.

[0671] In one possible implementation, the PBCH and DMRS partially overlap in the frequency domain, and the DMRS satisfies at least one of the following: the DMRS is mapped through a predefined comb structure; the DMRS is mapped with M consecutive first frequency domain resource elements as a basic unit, and each basic unit is separated by at least one first frequency domain resource element, where M is a positive integer greater than 1; the DMRS is mapped to the first P first frequency domain resource elements occupied by the PBCH, where P is a positive integer; the DMRS is mapped to the last Q first frequency domain resource elements occupied by the PBCH, where Q is a positive integer.

[0672] In one possible implementation, the PBCH and DMRS completely or partially overlap; the transmission power ratio of the PBCH and DMRS is determined based on at least one of the following: a predefined ratio; the TRP corresponding to the first SSB; the TRP group corresponding to the first SSB; the synchronization grid of the first SSB; the cell ID corresponding to the first SSB; the index of the first SSB; the index of the SSB group to which the first SSB belongs; the type of the first SSB; the synchronization signal in the first SSB; the signal that triggers the first SSB set; MIB; Layer 1 load; RRC signaling of the non-serving cell; MAC signaling of the non-serving cell; DCI signaling of the non-serving cell; WUS; PRACH.

[0673] In one possible implementation, when the PBCH and the synchronization signal completely or partially overlap, at least two of the PBCH, the PSS in the synchronization signal, and the SSS in the synchronization signal satisfy at least one of the following: the PBCH and the PSS completely or partially overlap; the PBCH and the SSS completely or partially overlap; or the PSS and the SSS completely or partially overlap.

[0674] In one possible implementation, when the PBCH overlaps with at least one portion of the DMRS and the synchronization signal, the transmission power of the PBCH satisfies any of the following: the transmission power corresponding to the first resource is the same as the transmission power corresponding to the second resource; or the transmission power corresponding to the first resource is different from the transmission power corresponding to the second resource; wherein the first resource is the resource of the PBCH that overlaps with at least one portion of the DMRS and the synchronization signal, and the second resource is the resource of the PBCH that does not overlap with at least one portion of the DMRS and the synchronization signal.

[0675] In one possible implementation, the SSB transmission device 300 provided in this application embodiment may further include a processing module. The processing module is configured to measure a first parameter based on a first signal in a first SSB set, the first signal including at least one of the following: a synchronization signal; PBCH; DMRS; wherein the first parameter includes at least one of the following: RSRP, RSRQ, SINR, RSSI, RSTD.

[0676] In one possible implementation, the first SSB in the first SSB set does not include DMRS; wherein the half-frame number and at least part of the index information of the first SSB in the first SSB set are indicated or determined based on at least one of the following: MIB; Layer 1 load; WUS; signal that triggers the first SSB set; RRC signaling of the non-serving cell; MAC signaling of the non-serving cell; DCI signaling of the non-serving cell; first related information of the first SSB. In one possible implementation, the first relevant information includes at least one of the following: the frequency domain offset of the first SSB; the starting frequency domain position of the PSS in the synchronization signal; the starting frequency domain position of the SSS in the synchronization signal; the center frequency domain position of the PSS in the synchronization signal; the center frequency domain position of the SSS in the synchronization signal; the frequency domain spacing between the PSS and PBCH in the synchronization signal; the frequency domain spacing between the SSS and PBCH in the synchronization signal; the frequency domain spacing between the PSS and SSS in the synchronization signal; the time domain spacing between the PSS and PBCH in the synchronization signal; the time domain spacing between the SSS and PBCH in the synchronization signal; the time domain spacing between the PSS and SSS in the synchronization signal; the transmission power difference between the PSS and PBCH in the synchronization signal; the transmission power difference between the SSS and PBCH in the synchronization signal; the transmission power difference between the PSS and SSS in the synchronization signal; the scrambling code of the PBCH; and the repetition transmission mode or mapping method of the PBCH.

[0677] In one possible implementation, the first SSB in the first SSB set does not include DMRS, provided that a first condition is met; wherein the first condition includes at least one of the following: the time-domain interval between the PSS and the SSS in the synchronization signal is greater than or equal to a first threshold; and the PBCH is located between the PSS and the SSS in the synchronization signal.

[0678] In one possible implementation, the SSB transmission apparatus 300 provided in this application embodiment may further include: a processing module. The processing module is configured to determine a first SSB based on at least one of the following: DMRS; time-frequency resources of the first SSB according to a default agreement; synchronization grid of the first SSB; cell ID corresponding to the first SSB; index of the first SSB; index of the SSB group to which the first SSB belongs; type of the first SSB; synchronization signal in the first SSB; signal triggering the first SSB set; second SSB; MIB; SIB; Layer 1 load; WUS; PRACH.

[0679] In one possible implementation, the SSB transmission device 300 provided in this application embodiment may further include: a transmitting module. The transmitting module is configured to report first capability information via at least one of the following: a first preamble associated with the first SSB; an RO associated with the first SSB; uplink messages related to the random access procedure; uplink control signaling; RRC signaling; WUS signaling; and a signal that triggers the first SSB; wherein the first capability information corresponds to whether the SSB transmission device 300 supports the first SSB.

[0680] See Figure 16 When the SSB transmission device is a network-side device or a component within a network-side device, the SSB transmission device 400 includes a transmission module 401. The transmission module 401 is used to transmit a first SSB set, which includes R time-domain transmitted first SSBs, where R is a positive integer. The first SSB set satisfies any of the following: the first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and DMRS in the first SSB set; the first SSBs in the first SSB set do not include DMRS.

[0681] This application provides an SSB transmission apparatus. Since the first SSB set includes a first SSB transmitted R times in the time domain, when R is a positive integer greater than 1, the first SSB set can include multiple times of the first SSB time domain transmission. The terminal can improve the SSB reception performance based on these multiple times of the first SSB time domain transmission. And / or, since the first SSB set can satisfy the requirement of including DMRS, and the PBCH and DMRS in the first SSB set do not overlap, that is, the DMRS included in the first SSB set only needs to satisfy the requirement of not overlapping with the PBCH, without occupying fixed resources in the time and frequency domains. For example, DMRS needs to exist on each symbol of the PBCH. Therefore, in different scenarios, the resources occupied by DMRS can be flexibly allocated according to the needs of different scenarios, so that the terminal can accurately receive the first SSB. Alternatively, since the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with the synchronization signal in the first SSB set, the overall resources occupied by the first SSB can be reduced, thus improving the system's resource utilization. And / or, since the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with the DMRS, the resources occupied by the PBCH are not limited by the resources occupied by the DMRS, thus increasing the amount of information the PBCH can carry. This allows the terminal to obtain more system information through the PBCH, thereby improving the performance of the terminal's communication-related actions. Alternatively, since the first SSB in the first SSB set does not include a DMRS, the resources occupied by the PBCH are not limited by the resources occupied by the DMRS, thus increasing the amount of information the PBCH can carry. This allows the terminal to obtain more system information through the PBCH, thereby improving the performance of the terminal's communication-related actions.

[0682] In one possible implementation, the first SSB set satisfies any of the following: the first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and DMRS in the first SSB set; the DMRS satisfies at least one of the following: DMRS exists in at least a portion of the first time units occupied by the PBCH; the frequency domain resources occupied by the DMRS are different in at least a portion of the first time units occupied by the PBCH; the sequences of the DMRS are different in at least a portion of the first time units occupied by the PBCH.

[0683] In one possible implementation, the sequence difference of DMRS in at least a portion of the first time units occupied by PBCH includes at least one of the following: the number of frequency domain resources occupied by DMRS is different in different first time units; the offset of the frequency domain resources occupied by DMRS is different in different first time units.

[0684] In one possible implementation, the different number of frequency domain resources occupied by the DMRS includes at least one of the following: the frequency domain resource densities occupied by the DMRS are different; there is a subset relationship between the frequency domain resources occupied by the DMRS.

[0685] In one possible implementation, the offset of the frequency domain resources occupied by DMRS is indicated or determined based on at least one of the following: the index of the first time unit; the time domain retransmission identifier ID corresponding to the time domain transmission; the time domain retransmission group ID corresponding to the time domain transmission; the number of time domain transmissions; the interval between two adjacent time domain transmissions; the synchronization grid of the first SSB; the cell ID corresponding to the first SSB; the index of the first SSB; the index of the SSB group to which the first SSB belongs; the type of the first SSB; the synchronization signal in the first SSB; the signal that triggers the first SSB set; WUS; PRACH.

[0686] In one possible implementation, the sequence of DMRS differs on at least a portion of the first time units occupied by the PBCH based on at least one of the following indications or determinations: the index of the first time unit; the time-domain retransmission ID corresponding to the time-domain transmission; the time-domain retransmission group ID corresponding to the time-domain transmission; the number of time-domain transmissions; the interval between two adjacent time-domain transmissions; the synchronization grid of the first SSB; the cell ID corresponding to the first SSB; the index of the first SSB; the index of the SSB group to which the first SSB belongs; the type of the first SSB; the synchronization signal in the first SSB; the signal that triggers the first SSB set; WUS; PRACH.

[0687] In one possible implementation, when DMRS exists on at least a portion of the first time units occupied by PBCH, the at least a portion of the first time units are indicated or determined based on at least one of the following: the time-domain retransmission ID corresponding to the time-domain transmission; the time-domain retransmission group ID corresponding to the time-domain transmission; the number of time-domain transmissions; the interval between two adjacent time-domain transmissions; the time-domain resources of the first SSB according to the default agreement; MIB; Layer 1 load; SIB; the synchronization grid of the first SSB; the cell ID corresponding to the first SSB; the index of the first SSB; the index of the SSB group to which the first SSB belongs; the type of the first SSB; the synchronization signal in the first SSB; the signal that triggers the first SSB set; WUS; PRACH.

[0688] In one possible implementation, the first SSB set further includes a first SSB of S frequency domain transmissions, where S is a positive integer greater than 1; wherein the first SSB set satisfies any of the following: the first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and DMRS in the first SSB set; the sequence of DMRS satisfies any of the following: the sequence of DMRS in the S frequency domain transmissions is determined by the same first sequence; the sequence of DMRS corresponding to each frequency domain transmission in the S frequency domain transmissions is the same second sequence; the sequence of DMRS corresponding to at least some frequency domain transmissions in the S frequency domain transmissions is a different third sequence.

[0689] In one possible implementation, at least one of the DMRS sequence and the frequency domain resources occupied by the DMRS corresponding to each frequency domain transmission in the S frequency domain transmissions is indicated or determined based on at least one of the following: the frequency domain repetition transmission ID corresponding to the frequency domain transmission; the frequency domain repetition transmission group ID corresponding to the frequency domain transmission; the number of frequency domain transmissions; the interval between two adjacent frequency domain transmissions; the frequency domain resources of the first SSB according to the default agreement; the synchronization grid of the first SSB; the cell ID corresponding to the first SSB; the index of the first SSB; the index of the SSB group to which the first SSB belongs; the type of the first SSB; the synchronization signal in the first SSB; the signal that triggers the first SSB set; WUS; PRACH.

[0690] In one possible implementation, the first SSB set satisfies any of the following: the first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with DMRS; the first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and DMRS in the first SSB set; the overlap of the PBCH in the first SSB set with at least one of the synchronization signal and DMRS in the first SSB set includes at least one of the following: the PBCH completely overlaps or partially overlaps with DMRS; the PBCH completely overlaps or partially overlaps with the synchronization signal.

[0691] In one possible implementation, the PBCH and DMRS completely or partially overlap, and the generation, mapping, or scrambling method of the DMRS sequence is related to at least one of the following: the carrier ID corresponding to the first SSB; the TRP corresponding to the first SSB; the TRP group corresponding to the first SSB; the synchronization grid of the first SSB; the cell ID corresponding to the first SSB; the index of the first SSB; the index of the SSB group to which the first SSB belongs; the type of the first SSB; the synchronization signal in the first SSB; the signal that triggers the first SSB set; WUS; PRACH.

[0692] In one possible implementation, the PBCH and DMRS completely overlap, and the DMRS satisfies at least one of the following: the frequency domain resources occupied by the DMRS are the same as those occupied by the PBCH; there is no frequency domain offset between the frequency domain resources occupied by the DMRS and those occupied by the PBCH; the frequency domain resources occupied by the DMRS or the offset of the occupied frequency domain resources are independent of the cell ID corresponding to the first SSB; and the sequence of DMRS is mapped starting from the first or last frequency domain resource occupied by the PBCH.

[0693] In one possible implementation, partial overlap between PBCH and DMRS includes at least one of the following: partial overlap between PBCH and DMRS in the time domain; and partial overlap between PBCH and DMRS in the frequency domain.

[0694] In one possible implementation, the PBCH and DMRS partially overlap in the frequency domain, and the DMRS satisfies at least one of the following: the DMRS is mapped through a predefined comb structure; the DMRS is mapped with M consecutive first frequency domain resource elements as a basic unit, and each basic unit is separated by at least one first frequency domain resource element, where M is a positive integer greater than 1; the DMRS is mapped to the first P first frequency domain resource elements occupied by the PBCH, where P is a positive integer; the DMRS is mapped to the last Q first frequency domain resource elements occupied by the PBCH, where Q is a positive integer.

[0695] In one possible implementation, the PBCH and DMRS completely or partially overlap; the transmission power ratio of the PBCH and DMRS is indicated or determined based on at least one of the following: a predefined ratio; the TRP corresponding to the first SSB; the TRP group corresponding to the first SSB; the synchronization grid of the first SSB; the cell ID corresponding to the first SSB; the index of the first SSB; the index of the SSB group to which the first SSB belongs; the type of the first SSB; the synchronization signal in the first SSB; the signal that triggers the first SSB set; the MIB; the layer-one load; the RRC signaling of the non-serving cell; the MAC signaling of the non-serving cell; the DCI signaling WUS of the non-serving cell; and the PRACH.

[0696] In one possible implementation, when the PBCH and the synchronization signal completely or partially overlap, at least two of the PBCH, the PSS in the synchronization signal, and the SSS in the synchronization signal satisfy at least one of the following: the PBCH and the PSS completely or partially overlap; the PBCH and the SSS completely or partially overlap; or the PSS and the SSS completely or partially overlap.

[0697] In one possible implementation, when the PBCH overlaps with at least one portion of the DMRS and the synchronization signal, the transmission power of the PBCH satisfies any of the following: the transmission power corresponding to the first resource is the same as the transmission power corresponding to the second resource; or the transmission power corresponding to the first resource is different from the transmission power corresponding to the second resource; wherein the first resource is the resource of the PBCH that overlaps with at least one portion of the DMRS and the synchronization signal, and the second resource is the resource of the PBCH that does not overlap with at least one portion of the DMRS and the synchronization signal.

[0698] In one possible implementation, the first SSB in the first SSB set does not include DMRS; wherein the half-frame number and at least part of the index information of the first SSB in the first SSB set are indicated or determined based on at least one of the following: MIB; Layer 1 load; WUS; signal that triggers the first SSB set; RRC signaling of the non-serving cell; MAC signaling of the non-serving cell; DCI signaling of the non-serving cell; first related information of the first SSB. In one possible implementation, the first relevant information includes at least one of the following: the frequency domain offset of the first SSB; the starting frequency domain position of the PSS in the synchronization signal; the starting frequency domain position of the SSS in the synchronization signal; the center frequency domain position of the PSS in the synchronization signal; the center frequency domain position of the SSS in the synchronization signal; the frequency domain spacing between the PSS and PBCH in the synchronization signal; the frequency domain spacing between the SSS and PBCH in the synchronization signal; the frequency domain spacing between the PSS and SSS in the synchronization signal; the time domain spacing between the PSS and PBCH in the synchronization signal; the time domain spacing between the SSS and PBCH in the synchronization signal; the time domain spacing between the PSS and SSS in the synchronization signal; the transmission power difference between the PSS and PBCH in the synchronization signal; the transmission power difference between the SSS and PBCH in the synchronization signal; the transmission power difference between the PSS and SSS in the synchronization signal; the scrambling code of the PBCH; and the repetition transmission mode or mapping method of the PBCH.

[0699] In one possible implementation, the first SSB in the first SSB set does not include DMRS, provided that a first condition is met; wherein the first condition includes at least one of the following: the time-domain interval between the PSS and the SSS in the synchronization signal is greater than or equal to a first threshold; and the PBCH is located between the PSS and the SSS in the synchronization signal.

[0700] In one possible implementation, the SSB transmission apparatus 400 provided in this application embodiment may further include: a receiving module. The receiving module is configured to receive first capability information via at least one of the following: a first preamble associated with the first SSB; an RO associated with the first SSB; uplink messages related to the random access procedure; uplink control signaling; RRC signaling; WUS signaling; and a signal that triggers the first SSB; wherein the first capability information corresponds to whether the terminal supports the first SSB.

[0701] The SSB transmission device provided in this application embodiment can achieve Figures 3 to 14 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0702] like Figure 17 As shown, this application embodiment also provides a communication device 500, including a processor 501 and a memory 502. The memory 502 stores a program or instructions that can run on the processor 501. For example, when the communication device 500 is a terminal, the program or instructions executed by the processor 501 implement the various steps of the above-described terminal-side SSB transmission method embodiment, and achieve the same technical effect. When the communication device 500 is a network-side device, the program or instructions executed by the processor 501 implement the various steps of the above-described network-side device-side SSB transmission method embodiment, and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0703] This application embodiment also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement, for example... Figure 3 The steps in the method embodiment shown are illustrated. This terminal embodiment corresponds to the above-described terminal-side method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and achieve the same technical effect. The terminal can be... Figure 15 The transmission device of the SSB is shown. Specifically, Figure 18 A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0704] The terminal 600 includes, but is not limited to, at least some of the following components: radio frequency unit 601, network module 602, audio output unit 603, input unit 604, sensor 605, display unit 606, user input unit 607, interface unit 608, memory 609, and processor 610.

[0705] Those skilled in the art will understand that the terminal 600 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 610 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 18 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0706] It should be understood that, in this embodiment, the input unit 604 may include a graphics processor 6041 and a microphone 6042. The graphics processor 6041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 606 may include a display panel 6061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 607 includes at least one of a touch panel 6071 and other input devices 6072. The touch panel 6071 is also called a touch screen. The touch panel 6071 may include two parts: a touch detection device and a touch controller. Other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, power buttons, etc.), a trackball, a mouse, and a joystick, which will not be described in detail here.

[0707] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 601 can transmit it to the processor 610 for processing; in addition, the radio frequency unit 601 can send uplink data to the network-side device. Typically, the radio frequency unit 601 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0708] The memory 609 can be used to store software programs or instructions, as well as various data. The memory 609 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 609 may include volatile memory or non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 609 in this embodiment includes, but is not limited to, these and any other suitable types of memory.

[0709] Processor 610 may include one or more processing units; optionally, processor 610 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 610.

[0710] The radio frequency unit 601 is used to receive a first SSB set, which includes R time-domain transmitted first SSBs, where R is a positive integer. The first SSB set satisfies any of the following: the first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and DMRS in the first SSB set; the first SSBs in the first SSB set do not include DMRS.

[0711] This application provides a terminal where, since the first SSB set includes R time-domain transmissions of the first SSB, when R is a positive integer greater than 1, the first SSB set can include multiple time-domain transmissions of the first SSB. The terminal can improve the SSB reception performance based on these multiple time-domain transmissions of the first SSB. And / or, since the first SSB set can satisfy the requirement of including a DMRS, and the PBCH and DMRS in the first SSB set do not overlap, that is, the DMRS included in the first SSB set only needs to satisfy the requirement of not overlapping with the PBCH, without occupying fixed resources in the time and frequency domains. For example, DMRS needs to exist on each symbol occupied by the PBCH. Therefore, in different scenarios, the resources occupied by the DMRS can be flexibly allocated according to the needs of different scenarios, so that the terminal can accurately receive the first SSB. Alternatively, since the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with the synchronization signal in the first SSB set, the overall resources occupied by the first SSB can be reduced, thus improving the system's resource utilization. And / or, since the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with the DMRS, the resources occupied by the PBCH are not limited by the resources occupied by the DMRS, thus increasing the amount of information the PBCH can carry. This allows the terminal to obtain more system information through the PBCH, thereby improving the performance of the terminal's communication-related actions. Alternatively, since the first SSB in the first SSB set does not include a DMRS, the resources occupied by the PBCH are not limited by the resources occupied by the DMRS, thus increasing the amount of information the PBCH can carry. This allows the terminal to obtain more system information through the PBCH, thereby improving the performance of the terminal's communication-related actions.

[0712] It is understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment and achieve the same or corresponding technical effect. To avoid repetition, it will not be described again here.

[0713] This application embodiment also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement, for example... Figure 13 The steps of the method embodiment shown are illustrated. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this network-side device embodiment and can achieve the same technical effect.

[0714] Specifically, embodiments of this application also provide a network-side device, which can be... Figure 16 The transmission device for the SSB is shown. (For example...) Figure 19 As shown, the network-side device 700 includes: an antenna 701, a radio frequency (RF) device 702, a baseband device 703, a processor 704, and a memory 705. The antenna 701 is connected to the RF device 702. In the uplink direction, the RF device 702 receives information through the antenna 701 and transmits the received information to the baseband device 703 for processing. In the downlink direction, the baseband device 703 processes the information to be transmitted and sends it to the RF device 702. The RF device 702 processes the received information and transmits it through the antenna 701.

[0715] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 703, which includes a baseband processor.

[0716] The baseband device 703 may, for example, include at least one baseband board on which multiple chips are disposed, such as... Figure 19 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 705 via a bus interface to call the program or instructions in the memory 705 to execute the network-side device operations shown in the above method embodiments.

[0717] The network-side device may also include a network interface 706, such as a Common Public Radio Interface (CPRI).

[0718] The radio frequency device 702 is used to transmit a first SSB set, which includes R time-domain transmitted first SSBs, where R is a positive integer. The first SSB set satisfies any of the following: the first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and DMRS in the first SSB set; the first SSBs in the first SSB set do not include DMRS.

[0719] This application provides a network-side device. Since the first SSB set includes R time-domain transmissions of the first SSB, when R is a positive integer greater than 1, the first SSB set can include multiple time-domain transmissions of the first SSB. The terminal can improve the SSB reception performance based on these multiple time-domain transmissions. And / or, since the first SSB set can satisfy the requirement of including a DMRS, and the PBCH and DMRS in the first SSB set do not overlap, that is, the DMRS included in the first SSB set only needs to satisfy the requirement of not overlapping with the PBCH, without occupying fixed resources in the time and frequency domains. For example, a DMRS needs to exist on each symbol of the PBCH. Therefore, in different scenarios, the resources occupied by the DMRS can be flexibly allocated according to the needs of different scenarios, so that the terminal can accurately receive the first SSB. Alternatively, since the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with the synchronization signal in the first SSB set, the overall resources occupied by the first SSB can be reduced, thus improving the system's resource utilization. And / or, since the first SSB set includes a DMRS, and the PBCH in the first SSB set overlaps with the DMRS, the resources occupied by the PBCH are not limited by the resources occupied by the DMRS, thus increasing the amount of information the PBCH can carry. This allows the terminal to obtain more system information through the PBCH, thereby improving the performance of the terminal's communication-related actions. Alternatively, since the first SSB in the first SSB set does not include a DMRS, the resources occupied by the PBCH are not limited by the resources occupied by the DMRS, thus increasing the amount of information the PBCH can carry. This allows the terminal to obtain more system information through the PBCH, thereby improving the performance of the terminal's communication-related actions.

[0720] Furthermore, the network-side device 700 in this application embodiment also includes: a program or instructions stored in a memory 705 and executable on a processor 704, wherein the processor 704 calls the program or instructions in the memory 705 to execute. Figure 16 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0721] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described SSB transmission method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0722] The processor mentioned above is either the processor in the terminal described in the above embodiments or the processor in the network-side device. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0723] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described SSB transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0724] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0725] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described SSB transmission method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0726] This application also provides a wireless communication system, including: a terminal and a network-side device, wherein the terminal can be used to execute the steps of the SSB transmission method corresponding to the terminal side as described above, and the network-side device can be used to execute the steps of the SSB transmission method corresponding to the network-side device side as described above.

[0727] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0728] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of computer software products plus necessary general-purpose hardware platforms, and of course, they can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.), and the computer software product includes several instructions to cause the terminal or network-side device to execute the methods described in the various embodiments of this application.

[0729] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other implementations under the guidance of this application without departing from the spirit and scope of the claims. All of these implementations are within the protection scope of this application.

Claims

1. A method for transmitting a synchronization signal block (SSB), characterized in that, include: The terminal receives a first SSB set, which includes R time-domain transmitted first SSBs, where R is a positive integer, and the first SSB set satisfies any one of the following: The first SSB set includes a demodulation reference signal DMRS, and the physical broadcast channel PBCH in the first SSB set does not overlap with the DMRS; The first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signals in the first SSB set and the DMRS; The first SSB in the first SSB set does not include DMRS.

2. The method according to claim 1, characterized in that, The first SSB set satisfies any of the following: the first SSB set includes the DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes the DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and the DMRS in the first SSB set. The DMRS satisfies at least one of the following: The DMRS is present in at least a portion of the first time unit occupied by the PBCH; The frequency domain resources occupied by the DMRS are different in at least a portion of the first time units occupied by the PBCH; The sequences of the DMRS differ in at least a portion of the first time unit occupied by the PBCH.

3. The method according to claim 2, characterized in that, In at least a portion of the first time units occupied by the PBCH, the frequency domain resources occupied by the DMRS differ, including at least one of the following: The number of frequency domain resources occupied by the DMRS is different; The frequency domain resources occupied by the DMRS have different offsets.

4. The method according to claim 3, characterized in that, The number of frequency domain resources occupied by the DMRS varies, including at least one of the following: The frequency domain resource densities occupied by the DMRS are different; There is a subset relationship among the frequency domain resources occupied by the DMRS.

5. The method according to claim 3, characterized in that, The offset of the frequency domain resources occupied by the DMRS is determined based on at least one of the following: The index of the first time unit; The time-domain transmission corresponds to the time-domain repeat transmission identifier ID; The time-domain transmission corresponds to the time-domain retransmission group ID; The number of time-domain transmissions; The interval between two consecutive time-domain transmissions; The synchronization grid of the first SSB; The cell ID corresponding to the first SSB; The index of the first SSB; The index of the SSB group to which the first SSB belongs; The type of the first SSB; The signal that triggers the first SSB set; Wake-up signal WUS; Physical Random Access Channel (PRACH).

6. The method according to claim 2, characterized in that, The sequences of the DMRS differ at least a portion of the first time units occupied by the PBCH, and the sequences of the DMRS are determined based on at least one of the following: The index of the first time unit; The time-domain transmission corresponds to the time-domain repeat transmission ID; The time-domain transmission corresponds to the time-domain retransmission group ID; The number of time-domain transmissions; The interval between two consecutive time-domain transmissions; The synchronization grid of the first SSB; The cell ID corresponding to the first SSB; The index of the first SSB; The index of the SSB group to which the first SSB belongs; The type of the first SSB; Synchronization signal in the first SSB; The signal that triggers the first SSB set; WUS; PRACH.

7. The method according to claim 2, characterized in that, In the case that the DMRS exists on at least a portion of the first time units occupied by the PBCH, at least a portion of the first time units are determined based on at least one of the following: The time-domain transmission corresponds to the time-domain repeat transmission ID; The time-domain transmission corresponds to the time-domain retransmission group ID; The number of time-domain transmissions; The interval between two consecutive time-domain transmissions; The default convention for the temporal domain resources of the first SSB; Master Information Block (MIB); Layer 1 load; System Information Block (SIB); The synchronization grid of the first SSB; The cell ID corresponding to the first SSB; The index of the first SSB; The index of the SSB group to which the first SSB belongs; The type of the first SSB; Synchronization signal in the first SSB; The signal that triggers the first SSB set; WUS; PRACH.

8. The method according to any one of claims 1 to 7, characterized in that, The first SSB set also includes the first SSB transmitted in the S frequency domain, where S is a positive integer greater than 1; the first SSB set satisfies any of the following: the first SSB set includes the DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; The first SSB set includes the DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and the DMRS in the first SSB set; The sequence of the DMRS satisfies any of the following: The sequence of the DMRS in the S frequency domain transmissions is determined by the same first sequence; The sequence of the DMRS corresponding to each frequency domain transmission in the S frequency domain transmissions is the same second sequence; At least some of the frequency domain transmissions in the S transmissions correspond to different third sequences of the DMRS.

9. The method according to claim 8, characterized in that, At least one of the sequence of the DMRS corresponding to each of the S frequency domain transmissions and the frequency domain resources occupied by the DMRS is determined based on at least one of the following: The frequency domain transmission corresponds to the frequency domain repeat transmission ID; The frequency domain transmission corresponds to the frequency domain repetitive transmission group ID; The number of frequency domain transmissions; The interval between two consecutive frequency domain transmissions; The frequency domain resources of the first SSB by default; The synchronization grid of the first SSB; The cell ID corresponding to the first SSB; The index of the first SSB; The index of the SSB group to which the first SSB belongs; The type of the first SSB; Synchronization signal in the first SSB; The signal that triggers the first SSB set; WUS; PRACH.

10. The method according to any one of claims 1 to 9, characterized in that, The first SSB set satisfies any of the following: the first SSB set includes the DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes the DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and the DMRS in the first SSB set. The overlap between the PBCH in the first SSB set and at least one of the synchronization signal and the DMRS in the first SSB set includes at least one of the following: The PBCH may completely or partially overlap with the DMRS. The PBCH may completely or partially overlap with the synchronization signal.

11. The method according to claim 10, characterized in that, The PBCH completely or partially overlaps with the DMRS, and the generation, mapping, or scrambling method of the DMRS sequence is related to at least one of the following: The carrier ID corresponding to the first SSB; The first SSB corresponds to the Transmitter / Receiver Point (TRP); The TRP group corresponding to the first SSB; The synchronization grid of the first SSB; The cell ID corresponding to the first SSB; The index of the first SSB; The index of the SSB group to which the first SSB belongs; The type of the first SSB; Synchronization signal in the first SSB; The signal that triggers the first SSB set; WUS; PRACH.

12. The method according to claim 10 or 11, characterized in that, The PBCH completely overlaps with the DMRS, and the DMRS satisfies at least one of the following: The frequency domain resources occupied by the DMRS are the same as those occupied by the PBCH. The frequency domain resources occupied by the DMRS have no frequency domain offset relative to the frequency domain resources occupied by the PBCH; The frequency domain resources occupied by the DMRS or the offset of the occupied frequency domain resources are unrelated to the cell ID corresponding to the first SSB; The sequence of the DMRS is mapped starting from the first or last frequency domain resource occupied by the PBCH.

13. The method according to any one of claims 10 to 12, characterized in that, The overlap between the PBCH and the DMRS includes at least one of the following: The PBCH and the DMRS partially overlap in the time domain; The PBCH and the DMRS partially overlap in the frequency domain.

14. The method according to claim 13, characterized in that, The PBCH and the DMRS partially overlap in the frequency domain, and the DMRS satisfies at least one of the following: The DMRS is mapped through a predefined comb structure; The DMRS is mapped using M consecutive first frequency domain resource elements as a basic unit, and each basic unit is separated by at least one first frequency domain resource element, where M is a positive integer greater than 1. The DMRS is mapped to the first P first frequency domain resource elements of the frequency domain resources occupied by the PBCH, where P is a positive integer; The DMRS is mapped to the last Q first frequency domain resource elements of the frequency domain resources occupied by the PBCH, where Q is a positive integer.

15. The method according to any one of claims 10 to 14, characterized in that, The PBCH may completely or partially overlap with the DMRS. The transmission power ratio of the PBCH and the DMRS is determined based on at least one of the following: Predefined ratio; The TRP corresponding to the first SSB; The TRP group corresponding to the first SSB; The synchronization grid of the first SSB; The cell ID corresponding to the first SSB; The index of the first SSB; The index of the SSB group to which the first SSB belongs; The type of the first SSB; Synchronization signal in the first SSB; The signal that triggers the first SSB set; MIB; Layer 1 load; Radio Resource Control (RRC) signaling for non-serving cells; Media access control MAC signaling for non-serving cells; Downlink control information (DCI) signaling for non-serving cells; WUS; PRACH.

16. The method according to any one of claims 10 to 15, characterized in that, When the PBCH and the synchronization signal completely or partially overlap, at least two of the PBCH, the primary synchronization sequence PSS in the synchronization signal, and the secondary synchronization sequence SSS in the synchronization signal satisfy at least one of the following: The PBCH and the PSS may completely or partially overlap; The PBCH and the SSS may completely or partially overlap; The PSS and the SSS may completely or partially overlap.

17. The method according to any one of claims 10 to 16, characterized in that, When the PBCH overlaps with at least one portion of the DMRS and the synchronization signal, the transmission power of the PBCH satisfies any of the following: The transmission power corresponding to the first resource is the same as that corresponding to the second resource. The transmission power corresponding to the first resource is different from the transmission power corresponding to the second resource. Wherein, the first resource is a resource in the PBCH that overlaps with at least one of the DMRS and the synchronization signal, and the second resource is a resource in the PBCH that does not overlap with at least one of the DMRS and the synchronization signal.

18. The method according to any one of claims 1 to 17, characterized in that, The method further includes: The terminal measures a first parameter based on a first signal in the first SSB set, wherein the first signal includes at least one of the following: The synchronization signal; The PBCH; The DMRS; The first parameter includes at least one of the following: reference signal received power (RSRP), reference signal received quality (RSRQ), signal-to-interference-plus-noise ratio (SINR), received signal strength indication (RSSI), and reference signal time difference (RSTD).

19. The method according to any one of claims 1 to 18, characterized in that, The DMRS is not included in the first SSB set; The half-frame number and at least a portion of the index information of the first SSB in the first SSB set are indicated or determined based on at least one of the following: MIB; Layer 1 load; WUS; The signal that triggers the first SSB set; RRC signaling for non-serving cells; MAC signaling of non-serving cells; DCI signaling for non-serving cells; The first relevant information of the first SSB.

20. The method according to claim 19, characterized in that, The first relevant information includes at least one of the following: The frequency domain offset of the first SSB; The starting frequency domain position of the PSS in the synchronization signal; The starting frequency domain position of the SSS in the synchronization signal; The center frequency domain position of the PSS in the synchronization signal; The center frequency domain position of the SSS in the synchronization signal; The frequency domain spacing between the PSS and the PBCH in the synchronization signal; The frequency domain spacing between the SSS and the PBCH in the synchronization signal; The frequency domain spacing between the PSS and SSS in the synchronization signal; The time-domain interval between the PSS and the PBCH in the synchronization signal; The time-domain interval between the SSS and the PBCH in the synchronization signal; The time-domain interval between the PSS and SSS in the synchronization signal; The transmission power difference between the PSS and the PBCH in the synchronization signal; The transmission power difference between the SSS and the PBCH in the synchronization signal; The transmission power difference between the PSS and SSS in the synchronization signal; The scrambling code of the PBCH; The repeated transmission mode or mapping method of the PBCH.

21. The method according to any one of claims 1 to 20, characterized in that, If the first condition is met, the DMRS is not included in the first SSB set; The first condition includes at least one of the following: The time-domain interval between the PSS and SSS in the synchronization signal is greater than or equal to the first threshold. The PBCH is located between the PSS and SSS in the synchronization signal.

22. The method according to any one of claims 1 to 21, characterized in that, The method further includes: The terminal determines the first SSB based on at least one of the following: The DMRS; The time-frequency resources of the first SSB by default; The synchronization grid of the first SSB; The cell ID corresponding to the first SSB; The index of the first SSB; The index of the SSB group to which the first SSB belongs; The type of the first SSB; Synchronization signal in the first SSB; The signal that triggers the first SSB set; Second SSB; MIB; SIB; Layer 1 load; WUS; PRACH.

23. The method according to any one of claims 1 to 22, characterized in that, The method further includes: The terminal reports the first capability information through at least one of the following: The first preamble associated with the first SSB; The random access opportunity (RO) associated with the first SSB; Uplink messages related to the random access procedure; Uplink control signaling; RRC signaling; WUS signaling; The signal that triggers the first SSB; The first capability information corresponds to whether the terminal supports the first SSB.

24. A method for transmitting an SSB, characterized in that, include: The network-side device sends a first SSB set, which includes R time-domain transmitted first SSBs, where R is a positive integer, and the first SSB set satisfies any one of the following: The first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; The first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signals in the first SSB set and the DMRS; The first SSB in the first SSB set does not include DMRS.

25. The method according to claim 24, characterized in that, The first SSB set satisfies any of the following: the first SSB set includes the DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes the DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and the DMRS in the first SSB set. The DMRS satisfies at least one of the following: The DMRS is present in at least a portion of the first time unit occupied by the PBCH; The frequency domain resources occupied by the DMRS are different in at least a portion of the first time units occupied by the PBCH; The sequences of the DMRS differ in at least a portion of the first time unit occupied by the PBCH.

26. The method according to claim 25, characterized in that, In at least a portion of the first time units occupied by the PBCH, the frequency domain resources occupied by the DMRS differ, including at least one of the following: The number of frequency domain resources occupied by the DMRS is different; The frequency domain resources occupied by the DMRS have different offsets.

27. The method according to claim 26, characterized in that, The number of frequency domain resources occupied by the DMRS varies, including at least one of the following: The frequency domain resource densities occupied by the DMRS are different; There is a subset relationship among the frequency domain resources occupied by the DMRS.

28. The method according to claim 26, characterized in that, The offset of the frequency domain resources occupied by the DMRS is based on at least one of the following indications or determinations: The index of the first time unit; The time-domain transmission corresponds to the time-domain repeat transmission identifier ID; The time-domain transmission corresponds to the time-domain retransmission group ID; The number of time-domain transmissions; The interval between two consecutive time-domain transmissions; The synchronization grid of the first SSB; The cell ID corresponding to the first SSB; The index of the first SSB; The index of the SSB group to which the first SSB belongs; The type of the first SSB; Synchronization signal in the first SSB; The signal that triggers the first SSB set; WUS; PRACH.

29. The method according to claim 25, characterized in that, The sequences of the DMRS differ on at least a portion of the first time units occupied by the PBCH, and the sequences of the DMRS are determined based on at least one of the following: The index of the first time unit; The time-domain transmission corresponds to the time-domain repeat transmission ID; The time-domain transmission corresponds to the time-domain retransmission group ID; The number of time-domain transmissions; The interval between two consecutive time-domain repetitive transmissions; The synchronization grid of the first SSB; The cell ID corresponding to the first SSB; The index of the first SSB; The index of the SSB group to which the first SSB belongs; The type of the first SSB; Synchronization signal in the first SSB; The signal that triggers the first SSB set; WUS; PRACH.

30. The method according to claim 25, characterized in that, In the case that the DMRS exists on at least a portion of the first time units occupied by the PBCH, at least a portion of the first time units are indicated or determined based on at least one of the following: The time-domain transmission corresponds to the time-domain repeat transmission ID; The time-domain transmission corresponds to the time-domain retransmission group ID; The number of time-domain transmissions; The interval between two consecutive time-domain transmissions; The default convention for the temporal domain resources of the first SSB; MIB; Layer 1 load; SIB; The synchronization grid of the first SSB; The cell ID corresponding to the first SSB; The index of the first SSB; The index of the SSB group to which the first SSB belongs; The type of the first SSB; Synchronization signal in the first SSB; The signal that triggers the first SSB set; WUS; PRACH.

31. The method according to any one of claims 24 to 30, characterized in that, The first SSB set also includes the first SSB transmitted in the S frequency domain, where S is a positive integer greater than 1; the first SSB set satisfies any of the following: the first SSB set includes the DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; The first SSB set includes the DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and the DMRS in the first SSB set; The sequence of the DMRS satisfies any of the following: The sequence of the DMRS in the S frequency domain transmissions is determined by the same first sequence; The sequence of the DMRS corresponding to each frequency domain transmission in the S frequency domain transmissions is the same second sequence; At least some of the frequency domain transmissions in the S transmissions correspond to different third sequences of the DMRS.

32. The method according to claim 31, characterized in that, At least one of the sequence of the DMRS corresponding to each of the S frequency domain transmissions and the frequency domain resources occupied by the DMRS is indicated or determined based on at least one of the following: The frequency domain transmission corresponds to the frequency domain repeat transmission ID; The frequency domain transmission corresponds to the frequency domain repetitive transmission group ID; The number of frequency domain transmissions; The interval between two consecutive frequency domain transmissions; The frequency domain resources of the first SSB by default; The synchronization grid of the first SSB; The cell ID corresponding to the first SSB; The index of the first SSB; The index of the SSB group to which the first SSB belongs; The type of the first SSB; Synchronization signal in the first SSB; The signal that triggers the first SSB set; WUS; PRACH.

33. The method according to any one of claims 24 to 32, characterized in that, The first SSB set satisfies any of the following: the first SSB set includes the DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes the DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and the DMRS in the first SSB set. The overlap between the PBCH in the first SSB set and at least one of the synchronization signal and the DMRS in the first SSB set includes at least one of the following: The PBCH may completely or partially overlap with the DMRS. The PBCH may completely or partially overlap with the synchronization signal.

34. The method according to claim 33, characterized in that, The PBCH completely or partially overlaps with the DMRS, and the generation, mapping, or scrambling method of the DMRS sequence is related to at least one of the following: The carrier ID corresponding to the first SSB; The TRP corresponding to the first SSB; The TRP group corresponding to the first SSB; The synchronization grid of the first SSB; The cell ID corresponding to the first SSB; The index of the first SSB; The index of the SSB group to which the first SSB belongs; The type of the first SSB; Synchronization signal in the first SSB; The signal that triggers the first SSB set; WUS; PRACH.

35. The method according to claim 33 or 34, characterized in that, The PBCH completely overlaps with the DMRS, and the DMRS satisfies at least one of the following: The frequency domain resources occupied by the DMRS are the same as those occupied by the PBCH. The frequency domain resources occupied by the DMRS have no frequency domain offset relative to the frequency domain resources occupied by the PBCH; The frequency domain resources occupied by the DMRS or the offset of the occupied frequency domain resources are unrelated to the cell ID corresponding to the first SSB; The sequence of the DMRS is mapped starting from the first or last frequency domain resource occupied by the PBCH.

36. The method according to any one of claims 33 to 35, characterized in that, The overlap between the PBCH and the DMRS includes at least one of the following: The PBCH and the DMRS partially overlap in the time domain; The PBCH and the DMRS partially overlap in the frequency domain.

37. The method according to claim 36, characterized in that, The PBCH and the DMRS partially overlap in the frequency domain, and the DMRS satisfies at least one of the following: The DMRS is mapped through a predefined comb structure; The DMRS is mapped using M consecutive first frequency domain resource elements as a basic unit, and each basic unit is separated by at least one first frequency domain resource element, where M is a positive integer greater than 1. The DMRS is mapped to the first P first frequency domain resource elements of the frequency domain resources occupied by the PBCH, where P is a positive integer; The DMRS is mapped to the last Q first frequency domain resource elements of the frequency domain resources occupied by the PBCH, where Q is a positive integer.

38. The method according to any one of claims 33 to 37, characterized in that, The PBCH may completely or partially overlap with the DMRS. The transmission power ratio of the PBCH and the DMRS is determined based on at least one of the following: Predefined ratio; The TRP corresponding to the first SSB; The TRP group corresponding to the first SSB; The synchronization grid of the first SSB; The cell ID corresponding to the first SSB; The index of the first SSB; The index of the SSB group to which the first SSB belongs; The type of the first SSB; Synchronization signal in the first SSB; The signal that triggers the first SSB set; MIB; Layer 1 load; RRC signaling for non-serving cells; MAC signaling of non-serving cells; DCI signaling of non-serving cells WUS; PRACH.

39. The method according to any one of claims 33 to 38, characterized in that, When the PBCH and the synchronization signal completely or partially overlap, at least two of the PBCH, the PSS in the synchronization signal, and the SSS in the synchronization signal satisfy at least one of the following: The PBCH and the PSS may completely or partially overlap; The PBCH and the SSS may completely or partially overlap; The PSS and the SSS may completely or partially overlap.

40. The method according to any one of claims 33 to 39, characterized in that, When the PBCH overlaps with at least one portion of the DMRS and the synchronization signal, the transmission power of the PBCH satisfies any of the following: The transmission power corresponding to the first resource is the same as that corresponding to the second resource. The transmission power corresponding to the first resource is different from the transmission power corresponding to the second resource. Wherein, the first resource is a resource in the PBCH that overlaps with at least one of the DMRS and the synchronization signal, and the second resource is a resource in the PBCH that does not overlap with at least one of the DMRS and the synchronization signal.

41. The method according to any one of claims 24 to 40, characterized in that, The DMRS is not included in the first SSB set; The half-frame number and at least a portion of the index information of the first SSB in the first SSB set are indicated or determined based on at least one of the following: MIB; Layer 1 load; WUS; The signal that triggers the first SSB set; RRC signaling for non-serving cells; MAC signaling of non-serving cells; DCI signaling for non-serving cells; The first relevant information of the first SSB.

42. The method according to claim 41, characterized in that, The first relevant information includes at least one of the following: The frequency domain offset of the first SSB; The starting frequency domain position of the PSS in the synchronization signal; The starting frequency domain position of the SSS in the synchronization signal; The center frequency domain position of the PSS in the synchronization signal; The center frequency domain position of the SSS in the synchronization signal; The frequency domain spacing between the PSS and the PBCH in the synchronization signal; The frequency domain spacing between the SSS and the PBCH in the synchronization signal; The frequency domain spacing between the PSS and SSS in the synchronization signal; The time-domain interval between the PSS and the PBCH in the synchronization signal; The time-domain interval between the SSS and the PBCH in the synchronization signal; The time-domain interval between the PSS and SSS in the synchronization signal; The transmission power difference between the PSS and the PBCH in the synchronization signal; The transmission power difference between the SSS and the PBCH in the synchronization signal; The transmission power difference between the PSS and SSS in the synchronization signal; The scrambling code of the PBCH; The repeated transmission mode or mapping method of the PBCH.

43. The method according to any one of claims 24 to 42, characterized in that, If the first condition is met, the DMRS is not included in the first SSB set; The first condition includes at least one of the following: The time-domain interval between the PSS and SSS in the synchronization signal is greater than or equal to the first threshold. The PBCH is located between the PSS and SSS in the synchronization signal.

44. The method according to any one of claims 24 to 43, characterized in that, The method further includes: The network-side device receives first capability information through at least one of the following: The first preamble associated with the first SSB; The RO associated with the first SSB; Uplink messages related to the random access procedure; Uplink control signaling; RRC signaling; WUS signaling; The signal that triggers the first SSB; The first capability information corresponds to whether the terminal supports the first SSB.

45. A transmission device for SSB, characterized in that, The transmission device of the SSB includes: a receiving module; The receiving module is configured to receive a first SSB set, the first SSB set including R time-domain transmitted first SSBs, where R is a positive integer, and the first SSB set satisfies any one of the following: The first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; The first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signals in the first SSB set and the DMRS; The first SSB in the first SSB set does not include DMRS.

46. ​​The apparatus according to claim 45, characterized in that, The first SSB set satisfies any of the following: the first SSB set includes the DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes the DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and the DMRS in the first SSB set. The DMRS satisfies at least one of the following: The DMRS is present in at least a portion of the first time unit occupied by the PBCH; The frequency domain resources occupied by the DMRS are different in at least a portion of the first time units occupied by the PBCH; The sequences of the DMRS differ in at least a portion of the first time unit occupied by the PBCH.

47. The apparatus according to claim 45, characterized in that, The first SSB set also includes the first SSB transmitted in the S frequency domain, where S is a positive integer greater than 1; the first SSB set satisfies any of the following: the first SSB set includes the DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; The first SSB set includes the DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and the DMRS in the first SSB set; The sequence of the DMRS satisfies any of the following: The sequence of the DMRS in the S frequency domain transmissions is determined by the same first sequence; The sequence of the DMRS corresponding to each frequency domain transmission in the S frequency domain transmissions is the same second sequence; At least some of the frequency domain transmissions in the S transmissions correspond to different third sequences of the DMRS.

48. The apparatus according to claim 46 or 47, characterized in that, The first SSB set includes the DMRS, and the overlap between the PBCH in the first SSB set and at least one of the synchronization signals and the DMRS in the first SSB set includes at least one of the following: The PBCH may completely or partially overlap with the DMRS. The PBCH may completely or partially overlap with the synchronization signal.

49. The apparatus according to any one of claims 46 to 48, characterized in that, The DMRS is not included in the first SSB set; The half-frame number and at least a portion of the index information of the first SSB in the first SSB set are indicated or determined based on at least one of the following: MIB; Layer 1 load; WUS; The signal that triggers the first SSB set; RRC signaling for non-serving cells; MAC signaling of non-serving cells; DCI signaling for non-serving cells; The first relevant information of the first SSB.

50. A transmission device for SSB, characterized in that, The transmission device of the SSB includes: a transmission module; The sending module is used to send a first SSB set, which includes a first SSB transmitted in the time domain R times, where R is a positive integer, and the first SSB set satisfies any one of the following: The first SSB set includes DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; The first SSB set includes DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signals in the first SSB set and the DMRS; The first SSB in the first SSB set does not include DMRS.

51. The apparatus according to claim 50, characterized in that, The first SSB set satisfies any of the following: the first SSB set includes the DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; the first SSB set includes the DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and the DMRS in the first SSB set. The DMRS satisfies at least one of the following: The DMRS is present in at least a portion of the first time unit occupied by the PBCH; The frequency domain resources occupied by the DMRS are different in at least a portion of the first time units occupied by the PBCH; The sequences of the DMRS differ in at least a portion of the first time unit occupied by the PBCH.

52. The apparatus according to claim 50 or 51, characterized in that, The first SSB set also includes the first SSB transmitted in the S frequency domain, where S is a positive integer greater than 1; the first SSB set satisfies any of the following: the first SSB set includes the DMRS, and the PBCH in the first SSB set does not overlap with the DMRS; The first SSB set includes the DMRS, and the PBCH in the first SSB set overlaps with at least one of the synchronization signal and the DMRS in the first SSB set; The sequence of the DMRS satisfies any of the following: The sequence of the DMRS in the S frequency domain transmissions is determined by the same first sequence; The sequence of the DMRS corresponding to each frequency domain transmission in the S frequency domain transmissions is the same second sequence; At least some of the frequency domain transmissions in the S transmissions correspond to different third sequences of the DMRS.

53. The apparatus according to any one of claims 50 to 52, characterized in that, The first SSB set includes the DMRS, and the overlap between the PBCH in the first SSB set and at least one of the synchronization signals and the DMRS in the first SSB set includes at least one of the following: The PBCH may completely or partially overlap with the DMRS. The PBCH may completely or partially overlap with the synchronization signal.

54. The apparatus according to any one of claims 50 to 53, characterized in that, The DMRS is not included in the first SSB set; The half-frame number and at least a portion of the index information of the first SSB in the first SSB set are indicated or determined based on at least one of the following: MIB; Layer 1 load; WUS; The signal that triggers the first SSB set; RRC signaling for non-serving cells; MAC signaling of non-serving cells; DCI signaling for non-serving cells; The first relevant information of the first SSB.

55. A terminal, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the SSB transmission method as described in any one of claims 1 to 23.

56. A network-side device, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the SSB transmission method as described in any one of claims 24 to 44.

57. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the SSB transmission method as described in any one of claims 1 to 23, or implement the steps of the SSB transmission method as described in any one of claims 24 to 44.

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