SSB transmission method and apparatus, and device

Abstract

The present application belongs to the field of communications. Disclosed are an SSB transmission method and apparatus, and a device. The SSB transmission method in the embodiments of the present application comprises: a terminal receiving at least one of a first SSB and a second SSB, wherein the first SSB and the second SSB meet at least one of the following: there being an association relationship between the first SSB and the second SSB, the first SSB and the second SSB corresponding to different resources, and the first SSB and the second SSB corresponding to different configuration information.

Description

SSB transmission methods, devices and equipment

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411717639.1, filed on November 27, 2024, entitled "Transmission Method, Apparatus and Device for SSB", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application belongs to the field of communication technology, and specifically relates to a method, apparatus and equipment for transmitting SSB. Background Technology

[0004] In New Radio (NR) systems, beam management can be performed based on Synchronization Signal Blocks (SSBs). Network-side equipment can transmit multiple SSBs corresponding to different beam directions, allowing the terminal to determine the appropriate beam based on the SSB's measurement parameters.

[0005] As communication technology evolves, the antenna panels of communication devices will become increasingly larger, and the number of antennas they contain will also increase, leading to near-field communication (NFC) scenarios. However, in NFC, beam characteristics are not only related to direction but also to distance. That is, the intensity of the same beam exhibits non-linear changes at different distances in the same direction, exhibiting beam focusing characteristics. Therefore, beam management based solely on direction is not suitable for NFC scenarios, thus requiring enhancement of SSB-based beam management. Summary of the Invention

[0006] This application provides a method, apparatus, and device for transmitting SSB, which can solve the problem of insufficient beam management performance based on SSB.

[0007] Firstly, a method for transmitting an SSB is provided, including:

[0008] The terminal receives at least one of the first SSB and the second SSB;

[0009] Wherein, the first SSB and the second SSB satisfy at least one of the following:

[0010] There is an association between the first SSB and the second SSB;

[0011] The first SSB and the second SSB correspond to different resources;

[0012] The first SSB and the second SSB have different configuration information.

[0013] Secondly, a method for transmitting an SSB is provided, including:

[0014] The network-side device sends at least one of the first SSB and the second SSB;

[0015] Wherein, the first SSB and the second SSB satisfy at least one of the following:

[0016] There is an association between the first SSB and the second SSB;

[0017] The first SSB and the second SSB correspond to different resources;

[0018] The first SSB and the second SSB have different configuration information.

[0019] Thirdly, a transmission device for an SSB is provided, comprising:

[0020] A receiving module, configured to receive at least one of a first SSB and a second SSB;

[0021] Wherein, the first SSB and the second SSB satisfy at least one of the following:

[0022] There is an association between the first SSB and the second SSB;

[0023] The first SSB and the second SSB correspond to different resources;

[0024] The first SSB and the second SSB have different configuration information.

[0025] Fourthly, a transmission device for an SSB is provided, comprising:

[0026] A transmitting module for transmitting at least one of a first SSB and a second SSB;

[0027] Wherein, the first SSB and the second SSB satisfy at least one of the following:

[0028] There is an association between the first SSB and the second SSB;

[0029] The first SSB and the second SSB correspond to different resources;

[0030] The first SSB and the second SSB have different configuration information.

[0031] 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.

[0032] 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.

[0033] Seventhly, a terminal is provided, including a processor and a communication interface;

[0034] The communication interface is used to receive at least one of the first SSB and the second SSB.

[0035] Wherein, the first SSB and the second SSB satisfy at least one of the following:

[0036] There is an association between the first SSB and the second SSB;

[0037] The first SSB and the second SSB correspond to different resources;

[0038] The first SSB and the second SSB have different configuration information.

[0039] 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.

[0040] Ninthly, a network-side device is provided, including a processor and a communication interface;

[0041] The communication interface is used to send at least one of the first SSB and the second SSB;

[0042] Wherein, the first SSB and the second SSB satisfy at least one of the following:

[0043] There is an association between the first SSB and the second SSB;

[0044] The first SSB and the second SSB correspond to different resources;

[0045] The first SSB and the second SSB have different configuration information.

[0046] 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.

[0047] 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.

[0048] 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 programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0049] In a thirteenth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the SSB transmission method as described in the first aspect, or to implement the steps of the SSB transmission method as described in the second aspect.

[0050] In this embodiment, the terminal receives at least one of a first SSB and a second SSB; wherein the first SSB and the second SSB satisfy at least one of the following: there is an association between the first SSB and the second SSB; the first SSB and the second SSB correspond to different resources; and the first SSB and the second SSB correspond to different configuration information. For example, the first SSB and the second SSB can respectively correspond to beam management in two dimensions (such as direction dimension and distance dimension), thereby improving the efficiency and performance of beam management and reducing the processing complexity of the terminal. Attached Figure Description

[0051] Figure 1 is a schematic diagram of a communication system architecture provided in an embodiment of this application.

[0052] Figure 2 is a schematic flowchart of an SSB transmission method provided according to an embodiment of this application.

[0053] Figure 3 is a schematic block diagram of an SSB transmission device according to an embodiment of this application.

[0054] Figure 4 is a schematic block diagram of another SSB transmission device provided according to an embodiment of this application.

[0055] Figure 5 is a schematic block diagram of a communication device provided according to an embodiment of this application.

[0056] Figure 6 is a schematic diagram of the hardware structure of a terminal according to an embodiment of this application.

[0057] Figure 7 is a schematic block diagram of a network-side device provided according to an embodiment of this application. Detailed Implementation

[0058] 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.

[0059] 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.

[0060] 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 one in which the sender explicitly informs the receiver of specific information, the operation to be performed, or the requested result, etc., in the instruction sent. An indirect instruction can be understood as one in which the receiver determines the corresponding information based on the instruction sent by the sender, or makes a judgment and determines the operation to be performed or the requested result, etc., based on the judgment result.

[0061] 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.

[0062] Figure 1 shows a block diagram of a wireless communication system applicable to an embodiment of this application. Specifically, the wireless communication system includes a terminal 11 and a network-side device 12.

[0063] Terminal 11 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), shipborne equipment, pedestrian user equipment (PUE), smart home device (home device with wireless communication function, such as refrigerator, television, washing machine or furniture), game console, personal computer (PC), ATM or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart earphones, 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 the embodiments of this application.

[0064] Among them, network-side equipment 12 may include access network equipment.

[0065] Alternatively, 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 (WiFi) nodes, etc. The term "base station" can be referred to as Node B (NB), Evolved Node B (eNB), Next Generation Node B (gNB), New Radio Node B (NR Node B), Access Point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B, Transmit / Receive Point (TRP), or any other suitable term in the relevant field, as long as the same technical effect is achieved. The term "base station" is not limited to any specific technical terminology. It should be noted that this application embodiment only uses a base station in an NR system as an example for description and does not limit the specific type of base station.

[0066] To better understand the technical solution of this application, the SSB is explained below.

[0067] In an NR system, the terminal first performs initial access by receiving the SSB (also known as the Synchronization Signal and PBCH block, SSB).

[0068] The SSB consists of Primary Synchronization Signals (PSS), Secondary Synchronization Signals (SSS), the Physical Broadcast Channel (PBCH), and the Demodulation Reference Signal (DMRS) of the PBCH. PSS and SSS are used for coarse time-frequency synchronization, the PBCH carries the Master Information Block (MIB), and the DMRS of the PBCH is used for demodulation. Furthermore, the entire SSB occupies four Orthogonal Frequency-Division Multiplexing (OFDM) symbols in the time domain and a maximum of 20 resource blocks (RBs) in the frequency domain. Due to the limited time-frequency resources occupied by the SSB, only relatively preliminary coarse time-frequency synchronization can be performed based on it.

[0069] When the terminal receives an SSB, it can first detect the PSS sequence and obtain the Physical Cell Identifier (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. This allows us to obtain the complete physical cell ID (such as the Physical Cell Identifier, PCI), 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.

[0070] In addition to coarse synchronization, SSBs are used in NR systems for beam management (also known as beam training). Especially before Radio Resource Control (RRC) connection, such as during the initial access phase, SSBs are used for preliminary beam management to ensure the transmission performance of random access related signals. For frequency bands below 3 GHz, a single SSB burst set can contain a maximum of 4 SSBs and scan a maximum of 4 beams; for frequency bands from 3 GHz to 6 GHz, a single SSB burst set can contain a maximum of 8 SSBs and scan a maximum of 8 beams; for millimeter-wave frequency bands above 6 GHz, a single SSB burst set can contain a maximum of 64 SSBs and scan a maximum of 64 beams.

[0071] The SSB transmission method provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0072] Figure 2 is a schematic flowchart of an SSB transmission method 200 according to an embodiment of this application. As shown in Figure 2, the SSB transmission method 200 may include at least some of the following:

[0073] S210, the network-side device sends at least one of the first SSB and the second SSB;

[0074] S220, the terminal receives at least one of the first SSB and the second SSB;

[0075] Wherein, the first SSB and the second SSB satisfy at least one of the following:

[0076] There is an association between the first SSB and the second SSB;

[0077] The first SSB and the second SSB correspond to different resources;

[0078] The first SSB and the second SSB have different configuration information.

[0079] It should be understood that Figure 2 illustrates the steps or operations of the SSB transmission method 200, but these steps or operations are merely examples, and other operations or variations of the operations in Figure 2 may also be performed in this application.

[0080] The receiving of the first SSB described in the embodiments of this application can be understood as measuring the first SSB, and the receiving of the second SSB described in the embodiments of this application can be understood as measuring the second SSB. The receiving and measuring described in the embodiments of this application can be interchanged, and the embodiments of this application do not limit this.

[0081] In this embodiment, the terminal receives at least one of a first SSB and a second SSB; wherein the first SSB and the second SSB satisfy at least one of the following: there is an association between the first SSB and the second SSB; the first SSB and the second SSB correspond to different resources; and the first SSB and the second SSB correspond to different configuration information. For example, the first SSB and the second SSB can respectively correspond to beam management in two dimensions (such as direction dimension and distance dimension), thereby improving the efficiency and performance of beam management and reducing the processing complexity of the terminal.

[0082] It should be noted that in far-field beam management based on SSB, multiple beams in different directions are typically used to cover different areas, which can effectively cover the entire cell. However, for near-field communication scenarios, the beam exhibits non-linear variations at different distances along the same direction. Therefore, current far-field beam management methods are not suitable for near-field communication scenarios. Thus, a more suitable beam management method is needed for near-field communication, and specific designs for SSB transmission are also required. Specifically, the SSB transmission used for beam management needs to be enhanced to better adapt to beam management schemes in both range and direction dimensions, improving near-field transmission performance and reducing the complexity of the terminal determining the optimal beam. In the embodiments of this application, the first SSB (e.g., the beam used to determine the direction dimension) and the second SSB (e.g., the beam used to determine the range dimension) can respectively correspond to beam management in both dimensions, thereby improving the efficiency and performance of beam management and reducing the processing complexity of the terminal determining the optimal beam.

[0083] The SSB described in the embodiments of this application can also be called any 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.

[0084] The SSB described in the embodiments of this application can also be replaced with other reference signals, such as wake-up signal (WUS), channel state information reference signal (CSI-RS), tracking reference signal (TRS), positioning reference signal (PRS), phase tracking reference signal (PT-RS), demodulation reference signal (DMRS), etc.

[0085] The Physical Random Access Channel (PRACH), Random Access Occasion (RO), PRACH resources, and Random Access Channel (RACH) resources described in this application embodiment can also be Sounding Reference Signal (SRS) (e.g., SRS transmission associated with an SSB, Configured Grant (CG) Physical Uplink Shared Channel (PUSCH) (e.g., used for small data transmission in idle / inactive states or for CG PUSCH transmission during RACH-less handover, or CG PUSCH during L1 / L2-triggered mobility (LTM) processes), WUS (e.g., uplink or downlink wake-up signal associated with an SSB), Random Access Message A (MsgA), MsgA PRACH, MsgA PUSCH, and Random Access Message 3 (message A, MsgA). 3, Msg3)PUSCH, at least one resource in the Physical Uplink Control Channel (PUCCH).

[0086] In some embodiments, the first SSB and the second SSB correspond to different resources, including at least one of the following:

[0087] The first SSB and the second SSB correspond to different SSB groups;

[0088] The first SSB and the second SSB correspond to different SSB indices;

[0089] The first SSB and the second SSB correspond to different SSB time-domain resources;

[0090] The first SSB and the second SSB correspond to different SSB frequency domain resources.

[0091] For example, the first SSB and the second SSB may correspond to different SSB groups. For instance, at least one first SSB belongs to one SSB group, and at least one second SSB belongs to another SSB group. In this case, the terminal can distinguish between the first SSB and the second SSB based on the different SSB groups; for example, different SSB groups may have different SSB indices or different SSB groups may correspond to different SSB group indices.

[0092] For example, the first SSB and the second SSB correspond to different time-domain resources of the SSB, wherein the time-domain resources include one of the following: transmission timing, symbol, time slot, period.

[0093] For example, the first SSB or the second SSB is transmitted in a specific time slot.

[0094] For example, the periods of the first SSB and the second SSB are different; the period of the first SSB can be less than or greater than the period of the second SSB.

[0095] For example, the first SSB and the second SSB correspond to different frequency domain resources of the SSB, wherein the frequency domain resources include one of the following: resource block (RB), sub-band, sync raster.

[0096] For example, the first SSB and the second SSB correspond to the same time-domain resources, but occupy different RBs in the frequency domain according to a specific mapping order.

[0097] For example, the first SSB and the second SSB correspond to different SSB indices. For instance, the first SSB and the second SSB each correspond to a specific SSB index, which can be used to distinguish them. For example, the index of the first SSB might be 1, 3, 5…; the index of the second SSB might be 2, 4, 6…; or other indexing methods. Another example is that the index of the first SSB and the index of the second SSB might be index values ​​obtained by modulo Z1 and Z2, respectively. Z1 and Z2 can also be the same value.

[0098] For example, the first SSB and the second SSB have different configuration information, such as the first SSB and the second SSB having independent time-frequency resource configurations.

[0099] In the embodiments of this application, the first SSB and the second SSB can be distinguished, thereby improving the efficiency and performance of SSB reception and beam management during beam management and reducing the complexity of the terminal.

[0100] In some embodiments, the first SSB can also be the second SSB, or the first SSB and the second SSB can be the same SSB. For example, a second SSB used to determine the range dimension of a beam can also be used to determine the direction dimension of a beam. In this case, a specific first SSB is not needed, and the second SSB used to determine the range dimension of the beam is the first SSB. In this case, the conditions that need to be met as described above also apply, and will not be elaborated here.

[0101] In the embodiments of this application, the first SSB can be used to determine the beam in the directional dimension, and the second SSB can be used to determine the beam at different distances in that direction. Therefore, there can be an association or mapping relationship between the first SSB and the second SSB.

[0102] In some embodiments, the first SSB and the second SSB are associated, including but not limited to at least one of the following:

[0103] The first SSB and the second SSB are located in the same temporal resource window;

[0104] The first SSB and the second SSB are located in the same frequency domain resource window;

[0105] The first SSB and the second SSB occupy consecutive time-domain resources;

[0106] The first SSB and the second SSB occupy consecutive frequency domain resources;

[0107] The first SSB and the second SSB are frequency-division multiplexing (FDM) on the same time domain resources;

[0108] The first SSB and the second SSB are time-division multiplexed on the same frequency domain resources;

[0109] The first SSB and the second SSB have the same configuration information;

[0110] The first SSB and the second SSB correspond to the same group;

[0111] The index of the first SSB is consecutive to the index of the second SSB;

[0112] The index of the first SSB is calculated using the index of the second SSB;

[0113] The index of the second SSB is calculated using the index of the first SSB;

[0114] The indexes of the first SSB and the second SSB are related to the first parameter, wherein the first parameter includes at least one of the following: direction identifier ID, beam identifier ID, distance identifier ID, and cell identifier ID.

[0115] For example, a first SSB and a second SSB located in the same time domain resource window are associated, and a time domain resource window may include one or more first SSBs and one or more second SSBs.

[0116] For example, taking a time-domain resource window as N1 time slots, the first SSB and the second SSB, which are related, are transmitted within N1 time slots.

[0117] For example, a first SSB and a second SSB located in the same frequency domain resource window are associated, and a frequency domain resource window may include one or more first SSBs and one or more second SSBs.

[0118] For example, taking a frequency domain resource window of N2 RBs as an example, the first SSB and the second SSB, which are related, are transmitted within N2 RBs.

[0119] For example, a first SSB and a second SSB occupying consecutive time-domain resources are associated, with one or more first SSBs and one or more second SSBs occupying consecutive time-domain resources.

[0120] For example, the time-domain resources corresponding to N3 second SSBs are the N3 consecutive time-domain resources following the time-domain resources corresponding to 1 first SSB.

[0121] For example, a first SSB and a second SSB occupying contiguous frequency domain resources are associated, with one or more first SSBs and one or more second SSBs occupying contiguous frequency domain resources.

[0122] For example, the frequency domain resources corresponding to N4 second SSBs are the N4 consecutive frequency domain resources following the frequency domain resources corresponding to 1 first SSB.

[0123] For example, one or more first SSBs and one or more second SSBs of FDM on the same time domain resource are associated.

[0124] For example, one or more first SSBs and one or more second SSBs of TDM on the same frequency domain resources are associated.

[0125] For example, the first SSB and the second SSB correspond to the same configuration information. For instance, at least one first SSB and at least one second SSB are configured in the same signaling configuration, such as the same RRC signaling or broadcast signaling.

[0126] For example, the first SSB and the second SSB correspond to the same SSB group. For instance, at least one first SSB and at least one second SSB belong to the same SSB group. For example, one first SSB and four second SSBs belong to the same SSB group (such as the first SSB being the first SSB in the SSB group, or the first SSB being the SSB with the smallest SSB index in the SSB group, or the first SSB being the SSB with the largest SSB index in the SSB group).

[0127] For example, the indexes of one or more first SSBs are consecutive to the indexes of one or more second SSBs.

[0128] For example, after one first SSB, there are N5 second SSBs. The index of the N5 second SSBs is the index of the first SSB plus 1.

[0129] For example, the index of the first SSB is calculated using the index of the second SSB. For instance, the index of the second SSB can be input into a specific function to obtain the index of the first SSB.

[0130] For example, the index of the second SSB is calculated using the index of the first SSB. For instance, the index of the first SSB can be input into a specific function to obtain the index of the second SSB.

[0131] For example, the index of the first SSB and the index of the second SSB are related to the first parameter. For instance, the index of the first SSB and the index of the second SSB can be determined based on the first parameter.

[0132] In some embodiments, the association between the first SSB and the second SSB can be agreed upon by a protocol, or the association between the first SSB and the second SSB can be configured by the network side.

[0133] In this embodiment, the association relationship between the first SSB and the second SSB can also be that one first SSB is associated with K1 first SSBs, or one second SSB is associated with K2 first SSBs. The above association relationships also apply and will not be elaborated upon here. For example, when one first SSB is associated with multiple second SSBs, it can be understood that the beam direction corresponding to the first SSB is first determined, and then the beam with the optimal distance among the multiple second SSBs is determined along that beam direction. Conversely, when one second SSB is associated with multiple first SSBs, it can be understood that the distance corresponding to the second SSB is first determined, and then the beam with the optimal direction corresponding to the multiple first SSBs is determined at that distance.

[0134] To describe in more detail the distinction and relationship between the first and second SSBs, some specific examples are given below. Assume there are 4 first SSBs corresponding to 4 directions, and in each direction there are 4 second SSBs, each corresponding to a different distance in each direction. There are a total of 4 first SSBs and 16 second SSBs. For ease of description, the 4 first SSBs are designated as: First SSB#1, First SSB#2, First SSB#3, and First SSB#4; the 16 second SSBs are designated as: Second SSB#1, Second SSB#2, Second SSB#3, Second SSB#4, Second SSB#5, ..., Second SSB#16.

[0135] Optionally, the first SSB#i (i = 1, 2, 3, 4) and the second SSB#{1+4*(i-1)} to the second SSB#{4*i} belong to the same SSB group, or the first SSB#i is associated with the second SSB#{1+4*(i-1)} to the second SSB#{4*i}. For example, the first SSB#1 and the second SSB#1 to the second SSB#4 belong to the same SSB group, or the first SSB#1 is associated with the second SSB#1 to the second SSB#4. Of course, it is also possible that the first SSB#1 to the first SSB#4 belong to the same SSB group, and the second SSB#1 to the second SSB#16 belong to a different SSB group.

[0136] Based on the above description, the transmission order of the first SSB and the second SSB can be as shown in Examples 1 to 3 below.

[0137] Example 1: Four first SSBs, from SSB#1 to SSB#4, are transmitted sequentially within a certain time-domain resource window (e.g., two time slots), followed by the sequential transmission of second SSBs#1 to SSB#16. The advantage of this approach is that the first SSBs used to determine the direction can be transmitted first, allowing the terminal to determine the optimal direction based on the first SSBs, thus preparing for subsequent beamforming for determining the distance dimension.

[0138] Example 2: The first SSB#1 and its associated second SSB#1 to second SSB#4 are first transmitted sequentially within a certain time-domain resource window (e.g., two time slots), followed by the first SSB#2 and its associated second SSB#5 to second SSB#8, then the first SSB#3 and its associated second SSB#9 to second SSB#12, and finally the first SSB#4 and its associated second SSB#13 to second SSB#16. The advantage of this approach is that all first and second SSBs in the same direction are transmitted on demand, and the terminal can measure all associated SSBs within a specific timeframe. However, training beams in all directions takes a relatively long time.

[0139] Example 3: The first SSB#1 and its associated second SSB#1 to second SSB#4 are mapped on a certain frequency domain resource window and transmitted on the same time domain resource. Similarly, the first SSB#2 to first SSB#4 and their associated second SSBs are also mapped on a certain frequency domain resource window and transmitted on the same time domain resource. Moreover, the first SSB#1 to first SSB#4 are transmitted sequentially within a certain time domain resource window (e.g., two time slots). The advantage of this scheme is that it can quickly transmit the first SSB in each direction, and also transmit multiple associated second SSBs simultaneously, resulting in faster beam training. However, it also places higher demands on the UE's processing capabilities.

[0140] It should be noted that the above example mainly uses the method of determining the direction dimension first for beam management, that is, prioritizing the beam corresponding to the first SSB. The same idea applies to beam management using the method of determining the range dimension first. In this case, the first SSB can be understood as the beam used to determine the range dimension, and the second SSB as the beam used to determine the direction dimension. This will not be elaborated further here.

[0141] In some embodiments, the terminal may determine the second SSB based on the first SSB and the association between the first SSB and the second SSB; or, the terminal may determine the first SSB based on the second SSB and the association between the first SSB and the second SSB. This ensures correct reception during the determination of the optimal beam.

[0142] In some embodiments, the SSB transmission method 200 further includes:

[0143] The terminal identifies at least one of the first SSB and the second SSB based on the first information; or

[0144] The terminal determines the association relationship between the first SSB and the second SSB based on the first information;

[0145] The first information includes, but is not limited to, at least one of the following:

[0146] SSB synchronization sequence;

[0147] SSB's DMRS;

[0148] Master Information Block (MIB);

[0149] System Information Block (SIB) (e.g., SIB1);

[0150] Layer 1 payload;

[0151] The default convention for SSB time-domain resources;

[0152] The default SSB frequency domain resources.

[0153] Optionally, the synchronization sequence of the SSB may include the sequence, or sequence length, or number of PSSs, or number of SSSs, or gap between PSSs and SSSs, etc.

[0154] For example, different synchronization sequences are introduced for the first SSB and the second SSB, with synchronization sequence 1 and synchronization sequence 2 corresponding to the first SSB and the second SSB, respectively. For instance, sequence 1 corresponds to the first SSB, and sequence 2 corresponds to the second SSB. Another example is that sequence length 1 corresponds to the first SSB, and sequence length 2 corresponds to the second SSB. Yet another example is that the number of PSSs 1 corresponds to the first SSB, and the number of PSSs 2 corresponds to the second SSB. Yet another example is that the number of SSSs 1 corresponds to the first SSB, and the number of SSSs 2 corresponds to the second SSB. Yet another example is that the interval 1 between PSSs and SSSs corresponds to the first SSB, and the interval 2 between PSSs and SSSs corresponds to the second SSB.

[0155] For example, multiple association relationships between the first SSB and the second SSB are pre-configured, and different association relationships between the first SSB and the second SSB correspond to different synchronization sequences of the SSB.

[0156] Optionally, the DMRS of the SSB may include: the frequency offset of the DMRS, or the time offset of the DMRS, or the DMRS sequence, etc.

[0157] For example, different DMRSs are introduced for the first SSB and the second SSB, with DMRS1 and DMRS2 corresponding to the first SSB and the second SSB, respectively. For instance, frequency domain offset 1 corresponds to the first SSB, and frequency domain offset 2 corresponds to the second SSB. Another example is time domain offset 1 corresponding to the first SSB, and time domain offset 2 corresponding to the second SSB. Yet another example is DMRS sequence 1 corresponding to the first SSB, and DMRS sequence 2 corresponding to the second SSB.

[0158] For example, the MIB may include a first information element, wherein the first information element is used to indicate that the received SSB is a first SSB or a second SSB, or the first information element is used to indicate an association between a first SSB and a second SSB from a variety of pre-configured associations between first SSBs and second SSBs, that is, the association between the currently used first SSB and the second SSB.

[0159] For example, SIB1 may include a second information element, wherein the second information element is used to indicate that the received SSB is a first SSB or a second SSB, or the second information element is used to indicate an association between a first SSB and a second SSB from a pre-configured association between a variety of first SSBs and second SSBs, that is, the association between the currently used first SSB and the second SSB.

[0160] For example, the L1-payload may include a third information element, wherein the third information element is used to indicate that the received SSB is a first SSB or a second SSB, or the third information element is used to indicate an association between a first SSB and a second SSB from a variety of pre-configured associations between first SSBs and second SSBs, that is, the association between the currently used first SSB and the second SSB.

[0161] For example, by default, the time domain resource X1 of the first SSB is defined, and the SSB received through the time domain resource X1 is the first SSB; and / or, by default, the time domain resource X2 of the second SSB is defined, and the SSB received through the time domain resource X2 is the second SSB.

[0162] For example, the frequency domain resource Y1 of the first SSB is agreed by default, and the SSB received through the frequency domain resource Y1 is the first SSB; and / or, the frequency domain resource Y2 of the second SSB is agreed by default, and the SSB received through the frequency domain resource Y2 is the second SSB.

[0163] In this embodiment, the terminal can identify at least one of the first SSB and the second SSB based on the first information, so that the terminal can determine which of the SSBs sent by the network-side device are the first SSB and which are the second SSB, thereby performing correct reception in the process of determining the optimal beam.

[0164] In this embodiment, the terminal can determine the correlation between the first SSB and the second SSB based on the first information, thereby enabling correct reception during the determination of the optimal beam. For example, the terminal determines the second SSB based on the first SSB and the correlation between the first SSB and the second SSB; or, the terminal determines the first SSB based on the second SSB and the correlation between the first SSB and the second SSB.

[0165] In this embodiment, some content in the first information may be indicated by the network-side device.

[0166] For example, the synchronization sequence of the SSB, the DMRS, MIB, SIB (such as SIB1), Layer 1 load, etc. in the first information can be indicated by the network-side equipment.

[0167] In some embodiments, the first SSB is an on-demand SSB; and / or, the second SSB is an on-demand SSB. This achieves energy-saving effects for the terminal or network-side equipment.

[0168] In this embodiment, some or all of the first SSB received by the terminal is an on-demand SSB, and / or, some or all of the second SSB received by the terminal is an on-demand SSB.

[0169] In some embodiments, the activation conditions for the on-demand SSB include, but are not limited to, at least one of the following:

[0170] The number of failed random access attempts based on non-on-demand SSB is greater than or equal to the first threshold.

[0171] The number of beam selection failures based on non-on-demand SSB is greater than or equal to the second threshold.

[0172] In this embodiment, when an attempt is made to select random access or beam selection based on a non-on-demand SSB, but the attempt fails, or fails more than a certain number of times, or fails no less than a certain number of times, the on-demand SSB can be activated to perform associated random access or beam selection.

[0173] For example, the second SSB is an on-demand SSB, and the first SSB is a non-on-demand SSB. The terminal first selects the first SSB to choose the corresponding random access resource and perform random access. When random access fails, or after a certain number of failures, the terminal can trigger the activation of the second SSB to reselect the corresponding random access resource for random access.

[0174] Optionally, the first threshold may be agreed upon by a protocol, or the first threshold may be configured by a network-side device.

[0175] Optionally, the second threshold may be agreed upon by a protocol, or the second threshold may be configured by a network-side device.

[0176] In some embodiments, the above-described S220 may specifically include:

[0177] The terminal receives either the first SSB or the second SSB according to the priority order between the first SSB and the second SSB.

[0178] It should be noted that when the terminal knows which are the first SSBs and which are the second SSBs, it can receive the first and / or second SSBs, for example, by measuring their Reference Signal Received Power (RSRP) or Signal to Interference Plus Noise Ratio (SINR). However, the terminal can first agree on the priority of SSB reception when receiving the first and second SSBs, thereby improving the efficiency of SSB reception.

[0179] In this embodiment, the terminal receives either the first SSB or the second SSB based on their priority order. For example, if the first SSB has a higher priority than the second SSB, the terminal receives the first SSB first. Conversely, if the second SSB has a higher priority than the first SSB, the terminal receives the second SSB first.

[0180] For example, by default, the terminal first receives (or measures) one type of SSB (e.g., the first SSB). After the terminal has received (or measured) the first SSB, it then determines whether to continue receiving (or measuring) the second SSB, or after the terminal has received (or measured) the second SSB, it then determines whether to continue receiving (or measuring) the first SSB.

[0181] For example, taking beam management prioritizing the direction dimension as an example, the protocol defaults to prioritizing the reception (or measurement) of the first SSB. For instance, there are four first SSBs, from #1 to #4, each corresponding to a different direction. Regardless of the transmission order of the first SSBs, from #1 to #4, the terminal prioritizes receiving all four first SSBs and then determines the beam corresponding to the optimal direction.

[0182] In some embodiments, the above-described S220 may specifically include:

[0183] The terminal receives the second SSB based on at least one of the second information and the first condition;

[0184] The second information includes, but is not limited to, at least one of the following:

[0185] The location of the terminal, the type of the terminal, the capabilities of the terminal, the transmission mode of the terminal, the network-side indication, and the relevant parameters of the first SSB;

[0186] The first condition includes, but is not limited to, at least one of the following:

[0187] The terminal's measurement result of the first SSB is less than or equal to a third threshold, the number of failed receptions of the Random Access Response (RAR) corresponding to message 1 (Msg1) of the random access procedure initiated by the first SSB is greater than or equal to a fourth threshold, and the RAR indicates that the second SSB should be received.

[0188] In this embodiment, the terminal receives the second SSB based on at least one of the second information and the first condition, thereby knowing that it needs to receive the second SSB based on at least one of the second information and the first condition.

[0189] In some embodiments, the terminal may also determine whether to receive the second SSB based on at least one of the second information and the first condition. This can avoid unnecessary reception of the second SSB and reduce the measurement complexity of the terminal. For example, if the beam selected for the measurement of the first SSB already meets certain requirements, then the measurement of the second SSB is not necessary, thereby reducing the measurement complexity of the terminal.

[0190] Optionally, the relevant parameters of the first SSB include, but are not limited to, at least one of the following: the transmission timing of the first SSB, the frequency domain resources of the first SSB, and the synchronization sequence of the first SSB.

[0191] Optionally, the position of the terminal is the absolute position of the terminal, or the position of the terminal is the position of the terminal relative to the network-side device (gNB).

[0192] Optionally, the type of the terminal includes at least one of the following: Internet of Things (IoT) terminal, low-power terminal, and ordinary terminal (such as mobile phone).

[0193] For example, if all the measurement metrics (e.g., RSRP) corresponding to the first SSB are less than or equal to the third threshold, then the second SSB is received (or measured).

[0194] For example, Msg1 is transmitted based on the first SSB. If the number of reception failures of RAR (such as Msg2) is greater than or equal to the fourth threshold, then the reception (or measurement) of the second SSB is performed.

[0195] For example, whether to receive (or measure) the second SSB depends on the instruction in the RAR. If the RAR indicates to receive (or measure) the second SSB, then the second SSB is received (or measured); otherwise, the second SSB is not received (or measured).

[0196] For example, the network side indicates whether to receive (or measure) a second SSB.

[0197] For example, the terminal determines whether to receive (or measure) the second SSB through the indication signaling or transmitted signal of the network-side device.

[0198] For example, the terminal determines whether to receive (or measure) the second SSB based on relevant parameters of the first SSB. For instance, the terminal determines whether to receive (or measure) the second SSB based on parameters related to the measured first SSB (e.g., transmission timing, frequency domain resources, synchronization sequence, etc.). It can also be understood that in some cases the first SSB is associated with the second SSB, and in others the first SSB is not associated with the second SSB.

[0199] For example, the terminal determines whether to receive (or measure) a second SSB based on its location relative to the network or its absolute location.

[0200] For example, an IoT terminal may only receive (or measure) the first SSB.

[0201] For example, whether the terminal has the ability to receive (or measure) two SSBs (first SSB and second SSB), or whether the terminal has the ability to receive (or measure) one SSB (first SSB or second SSB).

[0202] For example, for random access in low-power receive or transmit modes, the terminal can select only the first SSB or the second SSB for random access resource selection, thereby reducing energy consumption, and it is not necessary to measure all types of SSBs (first SSB and second SSB). For random access in high-power receive or transmit modes, the terminal selects two SSBs (first SSB and second SSB) for random access selection.

[0203] Optionally, the first condition may be agreed upon by a protocol, or the first condition may be configured by a network-side device.

[0204] Optionally, the third threshold may be agreed upon by a protocol, or the third threshold may be configured by a network-side device.

[0205] Optionally, the fourth threshold may be agreed upon by a protocol, or the fourth threshold may be configured by a network-side device.

[0206] In some embodiments, when the terminal receives the second SSB, the SSB transmission method 200 further includes:

[0207] The terminal determines the received second SSB according to at least one of the network-side indication signaling and the terminal's distance-related information (such as the distance information between the terminal and the network-side device) according to the default agreement of the protocol.

[0208] The network-side indication signaling includes at least one of the following: MIB, SIB1, RAR, message 4 of the random access procedure, and Media Access Control Control Element (MAC-CE) signaling.

[0209] In this embodiment, if the terminal needs to receive (or measure) a second SSB, the terminal determines the second SSB to be received based on at least one of the network-side indication signaling and the terminal's distance-related information (such as the distance information between the terminal and the network-side device) according to the default protocol agreement. This further reduces the number of second SSBs that need to be measured, thereby improving the efficiency of beam training and reducing the measurement complexity of the second SSB. Furthermore, in some cases, it may not even be necessary to measure the second SSB, for example, when determining if it is a far-field range.

[0210] For example, the network side instructs the terminal on distance-related information, where the distance-related information corresponds to the second SSB. In this case, the terminal only needs to measure the second SSB corresponding to the distance-related information, or the terminal only needs to measure at least one second SSB adjacent to the second SSB corresponding to the distance-related information. Optionally, if the distance (such as the distance between the terminal and the network-side device) meets the sixth threshold, then it is not necessary to measure the second SSB (i.e., it is beyond the near-field range).

[0211] In some embodiments, the first SSB can be used simultaneously in the near and far fields, such as the directional beam of the first SSB being applicable to both the near and far fields, while the second SSB is applicable to the near field. In this case, when the terminal is within the near field range, the first SSB is measured, and whether to measure the second SSB is determined based on at least one of second information and a first condition. When the terminal is in the far field, the second SSB does not need to be measured; only the first SSB needs to be measured. Of course, in the far field, a third SSB can also exist for far-field beam training. Optionally, the third SSB can be associated with the first SSB and / or the second SSB.

[0212] In some embodiments, the above-described S220 may specifically include one of the following:

[0213] The terminal receives at least one of the first SSB and the second SSB before initiating random access (such as transmitting Msg 1 or Msg A);

[0214] The terminal receives the first SSB before initiating random access (such as transmitting Msg 1 or Msg A), and the terminal receives the second SSB before sending message 3 (Msg 3) of the random access procedure;

[0215] The terminal receives the first SSB before initiating random access (such as transmitting Msg 1 or Msg A), and the terminal receives the second SSB before receiving RAR;

[0216] The terminal receives the first SSB before initiating random access (such as transmitting Msg 1 or Msg A), and the terminal receives the second SSB before receiving message 4 (Msg 4) of the random access procedure;

[0217] The terminal receives the first SSB before initiating random access (such as transmitting Msg 1 or Msg A), and the terminal receives the second SSB before receiving message B (Msg B) of the random access procedure.

[0218] In this embodiment, the terminal receives at least one of the first SSB and the second SSB before initiating random access (such as transmitting Msg 1 or Msg A). It is agreed by default that the optimal beam is determined before random access (such as transmitting Msg 1 or Msg A), thereby ensuring that the transmission of the entire random process is guaranteed to a certain extent.

[0219] In this embodiment, the terminal receives the first SSB before initiating random access (such as transmitting Msg 1 or Msg A), and the terminal receives the second SSB before sending message 3 (Msg 3) of the random access procedure. Alternatively, the terminal receives the second SSB before receiving RAR, or the terminal receives the second SSB before receiving message 4 (Msg 4) of the random access procedure, or the terminal receives the second SSB before receiving message B (Msg B) of the random access procedure. It is not required that the measurement of the second SSB be completed before random access, which can further reduce the complexity of terminal measurement, but at the same time, some random access performance will be sacrificed.

[0220] In some embodiments, the SSB transmission method 200 further includes:

[0221] The terminal reports the first capability;

[0222] The first capability includes, but is not limited to, at least one of the following:

[0223] The terminal supports receiving the first SSB;

[0224] The terminal supports receiving the second SSB;

[0225] The terminal supports near-field communication.

[0226] Optionally, the first capability can be reported via RRC signaling or implicitly via uplink reference signals (e.g., Msg1, Msg3, Msg5, or MsgA).

[0227] For example, a terminal can report its support for detecting a first SSB, or it can report its support for detecting a second SSB, or it can report its support for both SSB and SSB detection. Alternatively, the terminal can indirectly report its support for near-field communication, thereby supporting the corresponding SSB detection capability.

[0228] For example, the resources (sequence, time-frequency resources) used by a particular PRACH transmission indicate at least one of the following:

[0229] The terminal supports receiving the first SSB;

[0230] The terminal supports receiving a second SSB;

[0231] The terminal supports near-field communication.

[0232] In some embodiments, at least one of the first SSB and the second SSB is associated with PRACH;

[0233] Wherein, the association between at least one of the first SSB and the second SSB and the PRACH satisfies at least one of the following:

[0234] The first SSB and the second SSB are associated with resources determined by different PRACH configurations;

[0235] The first SSB and the second SSB are associated with the same PRACH configuration-defined resources;

[0236] The first SSB and the second SSB are associated with different random access preambles;

[0237] The first SSB and the second SSB are associated with different ROs;

[0238] The first SSB and the second SSB associated with the first SSB belong to the same RO group;

[0239] The combination of the first SSB and the second SSB is associated with a PRACH resource;

[0240] Only the first SSB is associated with PRACH resources;

[0241] Only the second SSB is associated with the PRACH resource.

[0242] Optionally, the different random access preambles described in this embodiment satisfy at least one of the following:

[0243] Belonging to different preamble groups

[0244] The base sequences of the preamble are different.

[0245] The length of the preamble sequence is different

[0246] The number of repetitions in a preamble sequence varies.

[0247] Optionally, the different random access times (ROs) described in this embodiment satisfy at least one of the following:

[0248] They belong to different RO groups;

[0249] RO corresponds to different time-domain resources;

[0250] RO corresponds to different frequency domain resources;

[0251] The cycles of RO are different.

[0252] For example, the first SSB and the second SSB associated with it belong to the same RO group. When the first SSB is associated with K second SSBs, the first SSB and the associated second SSBs can belong to the same RO group. For example, the uplink receive beams corresponding to the same RO group are the same, which simplifies the receive beams that the network side needs to prepare when receiving the random access preamble.

[0253] For example, the combination of the first SSB and the second SSB is mapped to the PRACH resource, so that the mapping of the first SSB and the second SSB can be determined simultaneously.

[0254] For example, it supports mapping the first SSB and the second SSB to a PRACH resource.

[0255] For example, the first SSB received is SSB0, SSB1, SSB2, SSB3; the second SSB received is SSB4, SSB5, SSB6, SSB7. SSB combinations include: {SSB0, SSB4}, {SSB1, SSB5}, {SSB2, SSB6}, {SSB3, SSB7}. These SSB combinations are associated with or mapped to PRACH resources according to specific rules.

[0256] For example, it may be possible to support only one type of SSB-to-PRACH resource mapping. For instance, in the case of a first SSB and a second SSB being associated, as long as the first SSB or the second SSB is associated with a PRACH resource, the second SSB or the first SSB can naturally be indirectly associated with the corresponding PRACH resource. This simplifies the mapping relationship between resources.

[0257] For example, only the first SSB or only the second SSB may be associated with a PRACH resource.

[0258] For example, the first SSB is associated with a PRACH resource, and the second SSB is associated with the first SSB. For terminals that only support the detection of the first SSB, after selecting the first SSB, the corresponding PRACH resource is directly selected. For terminals that support the detection of both SSBs, after selecting the first SSB, the second SSB is measured, and then random access is performed based on the PRACH resource associated with the first SSB and the measurement results of the two SSBs.

[0259] In this embodiment, at least one of the first SSB and the second SSB is associated with PRACH. After the terminal determines the beam, it will initiate random access and transmit Msg1 (preamble). At this time, different SSB types (i.e., the first SSB or the second SSB) can be associated with different PRACH resources, so that the network side can know whether the beam determined by the terminal corresponds to the first SSB or the second SSB, which facilitates subsequent scheduling and data transmission.

[0260] For example, the network-side device can receive a preamble on a specific RO based on the corresponding SSB beam, and determine whether the optimal beam selected by the terminal is based on the first SSB or the second SSB based on the preamble received on the specific RO. Alternatively, the network-side device can use the preamble received on a specific RO to determine whether the terminal is in the near-field or far-field range, facilitating subsequent scheduling and transmission.

[0261] In some embodiments, when the first SSB and the second SSB are associated with different random access preambles, or when the first SSB and the second SSB are associated with different resources determined by PRACH configurations, the random access preambles associated with the first SSB and the second SSB satisfy at least one of the following:

[0262] The length of the random access preamble associated with the first SSB is greater than the length of the random access preamble associated with the second SSB;

[0263] The peak-to-average power ratio (PAPR) of the random access preamble associated with the first SSB is less than that of the random access preamble associated with the second SSB.

[0264] The number of repetitions of the random access preamble associated with the first SSB is greater than the number of repetitions of the random access preamble associated with the second SSB.

[0265] In this embodiment, the first SSB has higher requirements for the preamble sequence. On the one hand, the first SSB may be used to cover both the near and far fields, meaning the corresponding cell coverage is larger, thus requiring better PRACH detection performance. On the other hand, in some cases, if the beam performance of the first SSB meets a first threshold, then the second SSB will not be measured. However, in this case, the beam performance corresponding to the first SSB may not be very good, so a better preamble sequence can be used to compensate for the PRACH detection performance and improve the success rate of random access.

[0266] In some embodiments, the SSB transmission method 200 further includes:

[0267] The terminal sends a first uplink random access message;

[0268] Wherein, the first uplink random access message satisfies one of the following:

[0269] The SSB on which the Pth retransmission or repeated transmission of the first uplink random access message is based is switched from the first SSB to the second SSB, or from the second SSB to the first SSB.

[0270] The SSB on which the Pth retransmission or repeated transmission of the first uplink random access message is based switches from one first SSB to another first SSB, or from one second SSB to another second SSB;

[0271] Where P is a positive integer.

[0272] Optionally, the first uplink random access message includes, but is not limited to, at least one of the following:

[0273] Message 1 (Msg 1) of the random access procedure, Message 3 (Msg 3) of the random access procedure, Message A (Msg A) of the random access procedure.

[0274] In this embodiment, if the terminal initiates random access through a first SSB or a second SSB, when duplicate transmission or retransmission occurs, other SSBs can be considered for duplicate transmission or retransmission, thereby improving access performance.

[0275] Specifically, network-side devices can select the corresponding receive beam to receive the first uplink random access message, thereby improving uplink transmission performance. For example, the SSB corresponding to the transmission of Msg1 can be switched, allowing the network side to prepare for the corresponding reception processing.

[0276] In some embodiments, the SSB transmission method 200 further includes:

[0277] The terminal sends a second uplink random access message;

[0278] Wherein, the path loss reference of the second uplink random access message satisfies one of the following:

[0279] The path loss reference for the second uplink random access message is the first SSB;

[0280] The path loss reference for the second uplink random access message is the second SSB;

[0281] The path loss reference of the second uplink random access message is reported via message 3 of the random access procedure;

[0282] The path loss reference for the Qth retransmission or repeated transmission of the second uplink random access message is switched from the first SSB to the second SSB, or from the second SSB to the first SSB; where Q is a positive integer.

[0283] Optionally, the second uplink random access message includes, but is not limited to, at least one of the following:

[0284] Message 1 (Msg 1) of the random access procedure, Message 3 (Msg 3) of the random access procedure, Message A (Msg A) of the random access procedure.

[0285] Optionally, the first uplink random access message and the second uplink random access message may be the same or different, and this application embodiment does not limit this.

[0286] For example, if the path loss reference for the second uplink random access message is the first SSB, then even if the optimal beam selected by the terminal corresponds to the second SSB, the path loss reference for the second uplink random access message will still be the first SSB. Optionally, the first SSB can be associated with the second SSB.

[0287] For example, the path loss reference for the second uplink random access message is the second SSB. In this case, even if the optimal beam selected by the terminal corresponds to the first SSB, the path loss reference for the second uplink random access message is still the second SSB. Optionally, the second SSB can be associated with the first SSB.

[0288] For example, the path loss reference for the second uplink random access message is reported via message 3 in the random access procedure. For instance, when the terminal moves, it reports a new optimal beam via message 3. When the terminal transmits the second uplink random access message, the network side's default path loss reference is the newly reported optimal beam.

[0289] For example, the path loss reference for the Qth retransmission or repeated transmission of the second uplink random access message may be switched from the first SSB to the second SSB, or vice versa. For instance, the initial transmission may use the second SSB as the path loss reference, and when a retransmission occurs, or after a certain number of retransmissions, the path loss reference may be switched to the first SSB to improve reliability. Alternatively, the initial transmission may use the first SSB as the path loss reference, and when a retransmission occurs, or after a certain number of retransmissions, the path loss reference may be switched to the second SSB to improve reliability.

[0290] It should be noted that near-field beams exhibit focusing characteristics, meaning near-field communication is highly sensitive to distance. Therefore, the path loss reference signal for relevant signals or channels (such as the second uplink random access message) during random access requires specific design considerations to improve the reliability of the second uplink random access message transmission. Especially when the terminal is moving rapidly, the optimal beam trained during beamforming can easily fail, thus affecting the transmission performance of the second uplink random access message.

[0291] In this embodiment, the reliability of the transmission of the second uplink random access message is improved by designing a path loss reference for the second uplink random access message.

[0292] In some embodiments, the SSB transmission method 200 further includes:

[0293] The terminal receives a first downlink random access message;

[0294] Wherein, the quasi-co-located (QCL) reference of the first downlink random access message satisfies one of the following:

[0295] The QCL reference of the first downlink random access message is the first SSB;

[0296] The QCL reference of the first downlink random access message is the second SSB;

[0297] The first downlink random access message uses the first SSB as its QCL reference on the first QCL parameter, and the first downlink random access message uses the second SSB as its QCL reference on the second QCL parameter.

[0298] The first downlink random access message does not have the QCL reference in the spatial relationship parameter;

[0299] The QCL reference of the first downlink random access message is reported via message 3 of the random access procedure;

[0300] The QCL reference for the Sth retransmission or repeated transmission of the first downlink random access message is switched from the first SSB to the second SSB, or from the second SSB to the first SSB; where S is a positive integer.

[0301] It should be noted that spatial relationships can also be referred to as spatial parameters, beams, transmit beams, receive beams, or transmit / receive beam pairs.

[0302] Optionally, the first downlink random access message includes, but is not limited to, at least one of the following:

[0303] Message 2 (Msg 2) of the random access procedure, Message 4 (Msg 4) of the random access procedure, Message B (Msg B) of the random access procedure.

[0304] Optionally, the first QCL parameter may be, for example, a spatial relation, and the second QCL parameter may be, for example, a parameter other than a spatial relation.

[0305] For example, the QCL reference for the first downlink random access message is the first SSB. Even if the optimal beam selected by the terminal corresponds to the second SSB, its QCL reference remains the first SSB associated with the second SSB. Performance can be improved from the perspective of QCL reference reliability by avoiding using the second SSB as the QCL reference.

[0306] For example, the QCL reference for the first downlink random access message is the second SSB. Even if the optimal beam selected by the terminal corresponds to the first SSB, its QCL reference remains the second SSB associated with the first SSB. Performance can be improved from the perspective of QCL reference reliability by avoiding using the second SSB as the QCL reference.

[0307] For example, the QCL reference for the first downlink random access message on the first QCL parameter is the first SSB, and the QCL reference for the first downlink random access message on the second QCL parameter is the second SSB. For instance, even if the optimal beam selected by the terminal corresponds to the second SSB, its QCL reference on the spatial relationship (i.e., the first QCL parameter) is still the first SSB associated with the second SSB. The reliability of the QCL reference can be enhanced by avoiding the second SSB being used as the QCL reference for certain QCL parameters (such as spatial relationships), thereby improving performance.

[0308] For example, the first downlink random access message does not have a QCL reference in terms of spatial relationship parameters. For instance, the first downlink random access message (such as Msg2 / Msg4 / MsgB) does not have a QCL reference in terms of spatial relationship. For example, this only applies to non-FR2 (high frequency) scenarios.

[0309] For example, the QCL reference for the first downlink random access message is reported via message 3 of the random access procedure. When the terminal moves, it reports a new optimal beam. When the network side transmits Msg4, the terminal's default QCL reference is its newly reported optimal beam. This enhancement from the perspective of QCL update ensures that the first downlink random access message can still use the second SSB for QCL reference.

[0310] For example, the QCL reference for the S-th retransmission or repeated transmission of the first downlink random access message may be switched from the first SSB to the second SSB, or vice versa. The suitability of the QCL reference can be determined based on whether a retransmission occurs, and the QCL reference can be switched accordingly. For instance, the initial transmission may use the second SSB as the QCL reference; when a retransmission occurs, or after a certain number of retransmissions, the QCL reference may be switched to the first SSB to improve reliability. As another example, the initial transmission may use the first SSB as the QCL reference; when a retransmission occurs, or after a certain number of retransmissions, the QCL reference may be switched to the second SSB to improve performance.

[0311] It should be noted that near-field beams exhibit focusing characteristics, meaning near-field communication is highly sensitive to distance. Therefore, the QCL reference for relevant signals or channels (such as the first downlink random access message) during random access requires specific design to improve transmission reliability. Especially when the terminal is moving rapidly, the optimal beam trained during beamforming can easily fail, thus affecting the transmission performance of uplink and downlink data.

[0312] In this embodiment, the reliability of the transmission of the first downlink random access message is improved by designing a QCL reference for the first downlink random access message.

[0313] In some embodiments, when the QCL reference of the first downlink random access message is switched, the timing of retransmission or repeated transmission of the first downlink random access message after the QCL reference is switched is determined based on a first time parameter; wherein, the first time parameter is related to the switching of the QCL reference.

[0314] In this embodiment, when a QCL handover occurs, the time interval between two subsequent downlink transmissions can be further agreed upon, so that the terminal has enough time to prepare for reception.

[0315] For example, when the QCL reference is switched, an additional first time parameter is introduced, which is used to determine the transmission time of the next downlink transmission.

[0316] For example, if a QCL switch occurs during the first retransmission after the initial transmission of Msg2, then the time parameter needs to be added to the originally agreed retransmission timing to delay the retransmission, so that the terminal has enough time to switch the QCL reference to the corresponding reception processing.

[0317] Optionally, the first time parameter can also be defined as a time offset or a time delay.

[0318] The QCL relationship described in this application embodiment can refer to the reference relationship between two channels or signals, or between channels and signals, in terms of parameters such as time error, frequency error, Doppler shift, Doppler spread, delay, delay spread, average delay, spatial relationship, spatial filter, spatial receiving or transmitting parameters, beam, and channel estimation.

[0319] The technical solution of this application is described in detail below through specific embodiments.

[0320] Example 1 details the technical solution of this application by taking the classification of SSBs (divided into first SSB and second SSB) as an example.

[0321] For the near field, beam training methods used in the far field are not entirely applicable. Near-field beam training requires consideration of both direction and distance, necessitating beam training based on the SSB (Special Support Bus) for both direction and distance dimensions. Therefore, SSBs can be categorized into a first SSB and a second SSB, corresponding to beam training in the two dimensions respectively. This improves the efficiency and performance of beam training while reducing the processing complexity for the UE (User Equipment).

[0322] In some embodiments, the terminal receives at least one of a first SSB (e.g., a beam for determining the direction dimension) and a second SSB (e.g., a beam for determining the distance dimension).

[0323] In some embodiments, the first SSB and the second SSB correspond to different resources, including at least one of the following:

[0324] The first SSB and the second SSB correspond to different SSB groups;

[0325] The first SSB and the second SSB correspond to different SSB indices;

[0326] The first SSB and the second SSB correspond to different SSB time-domain resources;

[0327] The first SSB and the second SSB correspond to different SSB frequency domain resources.

[0328] For example, the first SSB and the second SSB may correspond to different SSB groups. For instance, at least one first SSB belongs to one SSB group, and at least one second SSB belongs to another SSB group. In this case, the terminal can distinguish between the first SSB and the second SSB based on the different SSB groups; for example, different SSB groups may have different SSB indices or different SSB groups may correspond to different SSB group indices.

[0329] For example, the first SSB and the second SSB correspond to different time-domain resources of the SSB, wherein the time-domain resources include one of the following: transmission timing, symbol, time slot, period.

[0330] For example, the first SSB or the second SSB is transmitted in a specific time slot.

[0331] For example, the periods of the first SSB and the second SSB are different; the period of the first SSB can be less than or greater than the period of the second SSB.

[0332] For example, the first SSB and the second SSB correspond to different frequency domain resources of the SSB, wherein the frequency domain resources include one of the following: resource block (RB), sub-band, sync raster.

[0333] For example, the first SSB and the second SSB correspond to the same time-domain resources, but occupy different RBs in the frequency domain according to a specific mapping order.

[0334] For example, the first SSB and the second SSB correspond to different SSB indices. For instance, the first SSB and the second SSB each correspond to a specific SSB index, which can be used to distinguish them. For example, the index of the first SSB might be 1, 3, 5…; the index of the second SSB might be 2, 4, 6…; or other indexing methods. Another example is that the index of the first SSB and the index of the second SSB might be index values ​​obtained by modulo Z1 and Z2, respectively. Z1 and Z2 can also be the same value.

[0335] For example, the first SSB and the second SSB have different configuration information, such as the first SSB and the second SSB having independent time-frequency resource configurations.

[0336] Based on the above conditions, the terminal can distinguish between the first SSB and the second SSB, thereby improving the efficiency and performance of beam training and reducing the complexity of the terminal.

[0337] Furthermore, it should be noted that in some embodiments, the first SSB can also be the second SSB. For example, a second SSB used to determine the range dimension of a beam can also be used to determine the direction dimension of a beam. In this case, a specific first SSB is not required, and the second SSB used to determine the range dimension is the first SSB. In this case, the conditions mentioned above still apply, and will not be elaborated here.

[0338] Since the first SSB is used to determine the beam in the directional dimension, and the second SSB is used to determine the beam at different distances in that direction, there can be an association / mapping relationship between the first SSB and the second SSB.

[0339] In some embodiments, there is an association relationship between the first SSB and the second SSB, and the association relationship between the first SSB and the second SSB includes at least one of the following:

[0340] The first SSB and the second SSB are located in the same temporal resource window;

[0341] The first SSB and the second SSB are located in the same frequency domain resource window;

[0342] The first SSB and the second SSB occupy consecutive time-domain resources;

[0343] The first SSB and the second SSB occupy consecutive frequency domain resources;

[0344] The first SSB and the second SSB are FDMed on the same time domain resources;

[0345] The first SSB and the second SSB are TDM on the same frequency domain resources;

[0346] The first SSB and the second SSB have the same configuration information;

[0347] The first SSB and the second SSB correspond to the same group;

[0348] The index of the first SSB is consecutive to the index of the second SSB;

[0349] The index of the first SSB is calculated using the index of the second SSB;

[0350] The index of the second SSB is calculated using the index of the first SSB;

[0351] The indexes of the first SSB and the second SSB are related to the first parameter, wherein the first parameter includes at least one of the following: direction identifier ID, beam identifier ID, distance identifier ID, and cell identifier ID.

[0352] For example, a first SSB and a second SSB located in the same time domain resource window are associated, and a time domain resource window may include one or more first SSBs and one or more second SSBs.

[0353] For example, taking a time-domain resource window as N1 time slots, the first SSB and the second SSB, which are related, are transmitted within N1 time slots.

[0354] For example, a first SSB and a second SSB located in the same frequency domain resource window are associated, and a frequency domain resource window may include one or more first SSBs and one or more second SSBs.

[0355] For example, taking a frequency domain resource window of N2 RBs as an example, the first SSB and the second SSB, which are related, are transmitted within N2 RBs.

[0356] For example, a first SSB and a second SSB occupying consecutive time-domain resources are associated, with one or more first SSBs and one or more second SSBs occupying consecutive time-domain resources.

[0357] For example, the time-domain resources corresponding to N3 second SSBs are the N3 consecutive time-domain resources following the time-domain resources corresponding to 1 first SSB.

[0358] For example, a first SSB and a second SSB occupying contiguous frequency domain resources are associated, with one or more first SSBs and one or more second SSBs occupying contiguous frequency domain resources.

[0359] For example, the frequency domain resources corresponding to N4 second SSBs are the N4 consecutive frequency domain resources following the frequency domain resources corresponding to 1 first SSB.

[0360] For example, one or more first SSBs and one or more second SSBs of FDM on the same time domain resource are associated.

[0361] For example, one or more first SSBs and one or more second SSBs of TDM on the same frequency domain resources are associated.

[0362] For example, the first SSB and the second SSB correspond to the same configuration information. For instance, at least one first SSB and at least one second SSB are configured in the same signaling configuration, such as the same RRC signaling or broadcast signaling.

[0363] For example, the first SSB and the second SSB correspond to the same SSB group. For instance, at least one first SSB and at least one second SSB belong to the same SSB group. For example, one first SSB and four second SSBs belong to the same SSB group (such as the first SSB being the first SSB in the SSB group, or the first SSB being the SSB with the smallest SSB index in the SSB group, or the first SSB being the SSB with the largest SSB index in the SSB group).

[0364] For example, the indexes of one or more first SSBs are consecutive to the indexes of one or more second SSBs.

[0365] For example, after one first SSB, there are N5 second SSBs. The index of the N5 second SSBs is the index of the first SSB plus 1.

[0366] For example, the index of the first SSB is calculated using the index of the second SSB. For instance, the index of the second SSB can be input into a specific function to obtain the index of the first SSB.

[0367] For example, the index of the second SSB is calculated using the index of the first SSB. For instance, the index of the first SSB can be input into a specific function to obtain the index of the second SSB.

[0368] For example, the index of the first SSB and the index of the second SSB are related to the first parameter. For instance, the index of the first SSB and the index of the second SSB can be determined based on the first parameter.

[0369] In some embodiments, the association between the first SSB and the second SSB can be agreed upon by a protocol, or the association between the first SSB and the second SSB can be configured by the network side.

[0370] In this embodiment, the association relationship between the first SSB and the second SSB can also be that one first SSB is associated with K1 first SSBs, or one second SSB is associated with K2 first SSBs. The above association relationships also apply and will not be elaborated upon here. For example, when one first SSB is associated with multiple second SSBs, it can be understood that the beam direction corresponding to the first SSB is first determined, and then the beam with the optimal distance among the multiple second SSBs is determined along that beam direction. Conversely, when one second SSB is associated with multiple first SSBs, it can be understood that the distance corresponding to the second SSB is first determined, and then the beam with the optimal direction corresponding to the multiple first SSBs is determined at that distance.

[0371] To describe in more detail the distinction and relationship between the first and second SSBs, some specific examples are given below. Assume there are 4 first SSBs corresponding to 4 directions, and in each direction there are 4 second SSBs, each corresponding to a different distance in each direction. Therefore, there are a total of 4 first SSBs and 16 second SSBs. For ease of description, the 4 first SSBs are designated as: First SSB#1, First SSB#2, First SSB#3, and First SSB#4; and the 16 second SSBs are designated as: Second SSB#1, Second SSB#2, Second SSB#3, Second SSB#4, Second SSB#5, ..., Second SSB#16.

[0372] Optionally, the first SSB#i (i = 1, 2, 3, 4) and the second SSB#{1+4*(i-1)} to the second SSB#{4*i} belong to the same SSB group, or the first SSB#i is associated with the second SSB#{1+4*(i-1)} to the second SSB#{4*i}. For example, the first SSB#1 and the second SSB#1 to the second SSB#4 belong to the same SSB group, or the first SSB#1 is associated with the second SSB#1 to the second SSB#4. Of course, it is also possible that the first SSB#1 to the second SSB#4 belong to the same SSB group, and the second SSB#1 to the second SSB#16 belong to a different SSB group.

[0373] Based on the above description, the transmission order of the first SSB and the second SSB can be as shown in Examples 1 to 3 below.

[0374] Example 1: Four first SSBs #1 to #4 are transmitted sequentially within a certain time-domain resource window (e.g., two time slots), followed by the sequential transmission of second SSBs #1 to #16. The advantage of this approach is that the first SSBs used to determine the direction can be transmitted first, allowing the terminal to determine the optimal direction based on the first SSBs, thus preparing for the subsequent beamforming to determine the distance dimension.

[0375] Example 2: The first SSB#1 and its associated second SSBs#1 to #4 are first transmitted sequentially within a certain time-domain resource window (e.g., two time slots), followed by the first SSB#2 and its associated second SSBs#5 to #8, then the first SSB#3 and its associated second SSBs#9 to #12, and finally the first SSB#4 and its associated second SSBs#13 to #16. The advantage of this approach is that all first and second SSBs in the same direction are transmitted on demand, allowing the terminal to measure all associated SSBs within a specific timeframe. However, training beams in all directions takes a relatively long time.

[0376] Example 3: The first SSB#1 and its associated second SSB#1 to second SSB#4 are mapped on a certain frequency domain resource window and transmitted on the same time domain resource. Similarly, the first SSB#2 to first SSB#4 and their associated second SSBs are also mapped on a certain frequency domain resource window and transmitted on the same time domain resource. Moreover, the first SSB#1 to first SSB#4 are transmitted sequentially within a certain time domain resource window (e.g., two time slots). The advantage of this scheme is that it can quickly transmit the first SSB in each direction, and also transmit multiple associated second SSBs simultaneously, resulting in faster beam training. However, it also places higher demands on the UE's processing capabilities.

[0377] It should be noted that the above example mainly focuses on beam training by first determining the direction dimension, that is, prioritizing the determination of the beam corresponding to the first SSB. The same idea applies to beam training by first determining the range dimension. In this case, the first SSB can be understood as the beam used to determine the range dimension, and the second SSB as the beam used to determine the direction dimension; further elaboration is not required here.

[0378] Furthermore, the above embodiments provide a method for distinguishing between the first SSB and the second SSB. However, how the terminal determines which are the first SSB and which are the second SSB requires further explanation. This can be done through network configuration or by default protocol agreement.

[0379] In some embodiments, the terminal determines the first SSB and / or the second SSB (i.e., determines which are the first SSBs and which are the second SSBs) or the association between the first SSB and the second SSB by at least one of the following methods:

[0380] The synchronization sequence of the SSB includes: sequence, or sequence length, or number of PSS, or number of SSS, or gap between PSS and SSS, etc.

[0381] SSB's DMRS includes: the frequency domain offset of the DMRS, or the time domain offset of the DMRS, or the DMRS sequence, etc.

[0382] MIB;

[0383] SIB1;

[0384] L1-payload;

[0385] The default time-domain resources are defined, for example, the time slot for the first SSB transmission is defined by default;

[0386] The default frequency domain resources are defined, for example, the bandwidth range corresponding to the first SSB transmission is defined by default.

[0387] In some embodiments, some or all of the first SSB received by the terminal may be on-demand SSB, and / or, some or all of the second SSB received by the terminal may be on-demand SSB.

[0388] In some embodiments, the activation conditions for the on-demand SSB include at least one of the following:

[0389] The number of failed random access attempts based on non-on-demand SSB is greater than or equal to the first threshold.

[0390] The number of beam selection failures based on non-on-demand SSB is greater than or equal to the second threshold.

[0391] For example, when a non-on-demand SSB attempts to select for random access or beam selection but fails, or fails more than or less than a certain number of times, an on-demand SSB can be activated to perform associated random access or beam selection.

[0392] For example, the second SSB is an on-demand SSB (i.e., the SSB that needs to be activated for transmission), and the first SSB is a non-on-demand SSB. The terminal first selects the first SSB to choose the corresponding random access resource and perform random access. When random access fails or fails more than once, the terminal can trigger the activation of the second SSB to reselect the corresponding random access resource for random access.

[0393] Using the above method, the terminal can determine the transmission timing of the first SSB and the second SSB, as well as the correlation between them, thereby enabling correct reception during the process of determining the optimal beam.

[0394] Example 2 details the technical solution of this application using SSB measurement as an example.

[0395] It should be noted that the measurement in this embodiment can also be referred to as reception, and the two can be used interchangeably.

[0396] When a terminal knows which are the first SSBs and which are the second SSBs, it can measure the first SSBs and / or the second SSBs, for example, by measuring their RSRP or SINR. However, the measurement priority needs to be determined when measuring the first SSBs and the second SSBs.

[0397] In some embodiments, it is agreed by default that the terminal will first measure one SSB (e.g., the first SSB).

[0398] After the terminal has completed measuring the first SSB, it determines whether to continue measuring the second SSB, or after the terminal has completed measuring the second SSB, it determines whether to continue measuring the first SSB.

[0399] This embodiment takes beam training prioritizing the direction dimension as an example, meaning the protocol defaults to prioritizing the measurement of the first SSB. For example, there are four first SSBs, from 1 to 4, each corresponding to a different direction. Regardless of the transmission order of the first SSBs from 1 to 3 in Embodiment Group 1, the terminal prioritizes measuring all four first SSBs and then determines the beam corresponding to the optimal direction.

[0400] Based on the premise of prioritizing the measurement of the first SSB, the overall process for measuring the first SSB and the second SSB can be further determined.

[0401] In some embodiments, the terminal determines the step of measuring the first SSB and / or the second SSB, or whether to measure a specific SSB, including at least one of the following:

[0402] By default, the terminal completes the measurement of the first SSB and the second SSB before initiating RACH (transmitting Msg1 / MsgA).

[0403] The default convention is to complete the measurement of the first SSB before the terminal initiates RACH (transmitting Msg1 / MsgA), and to complete the measurement of the second SSB before the terminal transmits Msg3 or receives RAR, or between receiving Msg4 / MsgB.

[0404] Whether to measure the second SSB is determined based on a first condition; wherein the first condition includes, but is not limited to, at least one of the following: the measurement result of the terminal on the first SSB is less than or equal to a third threshold, the number of reception failures of the RAR corresponding to message 1 of the random access procedure initiated based on the first SSB is greater than or equal to a fourth threshold, and the RAR indicates that the second SSB should be received; for example, if all the measurement indicators (e.g., RSRP) corresponding to the first SSB are less than or equal to the third threshold, then the second SSB is measured; for example, if Msg1 is transmitted based on the first SSB, and the number of reception failures of the RAR (Msg2) reaches the fourth threshold, then the second SSB is measured; depending on the indication in the RAR, if the RAR indicates that the second SSB should be measured, then the second SSB is measured; otherwise, the second SSB is not measured.

[0405] The network side indicates whether to perform a second SSB measurement; for example, the terminal determines whether to perform a second SSB measurement through the network side's indication signaling or transmitted signals.

[0406] The terminal determines whether to measure the second SSB based on the relevant parameters of the first SSB. For example, the terminal determines whether to measure the second SSB based on the relevant parameters of the first SSB being measured (e.g., transmission timing, frequency domain resources, synchronization sequence, etc.). It can also be understood that in some cases the first SSB is associated with the second SSB, and in some cases the first SSB is not associated with the second SSB.

[0407] The terminal determines the SSB to be measured or selected based on one or more of the following factors: terminal location (e.g., the terminal determines whether to measure the second SSB based on its position relative to the network or its absolute position); terminal type (e.g., for IoT terminals, only the first SSB is measured); terminal capabilities (e.g., whether the terminal has the ability to measure two or one type of SSB); and terminal transmission mode (e.g., for random access in low-power receive or transmit modes, the terminal can select only the first or second SSB for random access resource selection, thereby reducing energy consumption, and does not necessarily need to measure all types of SSBs). For random access in high-power receive or transmit modes, the terminal selects two SSBs for random access selection.

[0408] For example, by default, the terminal completes the measurement of the first SSB and the second SSB before initiating RACH (transmitting Msg1 / MsgA). By default, the optimal beam is determined before random access, thereby ensuring that the transmission of the entire random process is guaranteed to a certain extent.

[0409] For example, the default convention is to complete the measurement of the first SSB before the terminal initiates RACH (transmitting Msg1 / MsgA), and to complete the measurement of the second SSB before the terminal transmits Msg3 or receives RAR, or between receiving Msg4 / MsgB. The overall idea is still that the measurement of the second SSB is required. However, it is not required to complete the measurement of the second SSB before random access. This can further reduce the complexity of terminal measurement, but at the same time, it will sacrifice some random access performance.

[0410] For example, based on the first condition, it is determined whether to measure the second SSB, and then it is determined whether to continue measuring the second SSB. If the beam selected for the measurement of the first SSB already meets certain requirements, then the measurement of the second SSB is not necessary, thereby reducing the measurement complexity of the terminal.

[0411] Based on the above, if the terminal needs to measure the second SSB, it can also select which specific second SSBs to measure, thereby further reducing the measurement complexity of the second SSB.

[0412] In some embodiments, the terminal measures at least a portion of the second SSB, and the determination of the at least a portion of the second SSB includes one of the following methods:

[0413] The terminal determines the second SSB to be measured based on a default convention (e.g., the measurement result of the first SSB). For example, if the terminal finds that the RSRP meets the fifth threshold after measuring the first SSB, then the terminal does not need to measure all the second SSBs associated with the first SSB, but only needs to measure a few of them; for example, measuring a portion of the second SSBs at equal intervals.

[0414] The network side indicates distance-related information, where the distance-related information corresponds to the second SSB. At this time, the terminal only needs to measure the second SSB corresponding to the distance-related information, or the terminal only needs to measure at least one second SSB adjacent to the second SSB corresponding to the distance-related information. Optionally, if the distance (such as the distance between the terminal and the network-side device) meets the sixth threshold, then it is not necessary to measure the second SSB (i.e., it is beyond the near-field range).

[0415] The network side indicates the second SSB that needs to be measured by the terminal, for example, through MIB, SIB1, RAR, Msg4, MAC signaling (such as MAC-CE), etc.

[0416] The above embodiments are primarily designed to further reduce the number of second SSBs that need to be measured at the terminal, thereby improving the efficiency and performance of beam training and reducing the complexity of the terminal. Furthermore, in some cases, it may not even be necessary to measure the second SSB, such as when determining the far-field range.

[0417] In some cases, the first SSB can be used for both near and far fields simultaneously; that is, the directional beam of the first SSB is applicable to both near and far fields, while the second SSB is applicable to the near field. In this case, when the terminal is within the near field range, the first SSB is measured according to the above embodiments, and whether or not the second SSB is measured is also considered. When the terminal is in the far field, the second SSB does not need to be measured; only the first SSB needs to be measured. Of course, a third SSB can also exist in the far field for far-field beam training. Optionally, the third SSB can be associated with the first SSB and / or the second SSB.

[0418] Regarding the SSB detection and measurement capabilities mentioned above, the terminal can report to the network, so that the network can obtain the probability of the corresponding SSB being selected, which helps the network optimize the resource allocation under the corresponding SSB and improve the efficiency of network resource utilization.

[0419] In some embodiments, the terminal needs to report the capability to measure or detect the specific type of SSB (which can be implicitly indicated or explicitly indicated by signaling). For example, the terminal can report a first SSB detection capability, a second SSB detection capability, or the capability to support both first and second SSB detection simultaneously. Alternatively, the terminal can indirectly report the capability to support near-field communication, thereby supporting the corresponding SSB detection capability.

[0420] Capability reporting can be done via RRC signaling or implicitly via uplink reference signals (e.g., Msg1, Msg3, Msg5, or MsgA).

[0421] For example, the resources (sequence, time, and frequency resources) used for a specific PRACH transmission.

[0422] Example 3 details the technical solution of this application using the association of SSB and RACH resources as an example.

[0423] Once the terminal has determined its beam, it will initiate random access and transmit Msg1 (preamble). At this time, different SSB types (i.e., the first SSB or the second SSB) can be associated with different PRACH resources, allowing the network side to know whether the beam determined by the terminal corresponds to the first or the second SSB, which facilitates subsequent scheduling and data transmission.

[0424] In some embodiments, the SSB and PRACH resources are associated as follows:

[0425] The first SSB and the second SSB are independently associated with resources determined by different PRACH configurations;

[0426] The first SSB and the second SSB are associated together with the same resource defined by the same PRACH configuration;

[0427] The first SSB and the second SSB are associated with different preambles; wherein, the different preambles satisfy at least one of the following: they belong to different preamble groups, the base sequences of the preambles are different, the lengths of the preamble sequences are different, and the number of repetitions of the preamble sequences are different.

[0428] The first SSB and the second SSB are associated with different ROs; wherein, the different ROs satisfy at least one of the following: they belong to different RO groups, the time domain resources corresponding to the ROs are different, the frequency domain resources corresponding to the ROs are different, and the periods of the ROs are different.

[0429] Based on the association between SSB and PRACH resources in the above embodiments, the network side can receive a preamble on a specific RO according to the corresponding SSB beam, and determine whether the optimal beam selected by the terminal is based on the first SSB or the second SSB based on the preamble received on the specific RO. Alternatively, the network side can use the information to determine whether the terminal is in the near field or far field range, which facilitates subsequent scheduling and transmission.

[0430] When the first SSB and the second SSB are associated with different preamble sequences or independent PRACH resources, at least one of the following conditions must be met:

[0431] The length of the preamble sequence associated with the first SSB is greater than that associated with the second SSB;

[0432] The PAPR of the preamble sequence associated with the first SSB is less than that of the preamble sequence associated with the second SSB.

[0433] The number of repetitions of the preamble sequence associated with the first SSB is greater than the number of repetitions of the preamble sequence associated with the second SSB.

[0434] Essentially, the first SSB (Secondary Support Bus) places higher demands on the preamble sequence. On one hand, the first SSB may cover both near and far fields simultaneously, meaning it corresponds to a larger cell coverage area, thus requiring better PRACH detection performance. On the other hand, in some cases, if the beam performance of the first SSB meets a first threshold, then the second SSB will not be measured. However, in this situation, the beam performance of the first SSB might not be very good, so a better preamble sequence can be used to compensate for the PRACH detection performance and improve the success rate of random access.

[0435] In some embodiments, the first SSB and its associated second SSB correspond to the same RO group.

[0436] For example, when a first SSB is associated with K second SSBs, the first SSB and the associated second SSBs can belong to the same RO group.

[0437] For example, the uplink receive beams corresponding to the same RO group are the same, which can simplify the receive beams that need to be prepared when the network receives the preamble.

[0438] In addition, a combination of the first SSB and the second SSB can be mapped to the PRACH resource, so that the mapping of the first SSB and the second SSB can be determined simultaneously.

[0439] In some embodiments, the mapping of a first SSB and a second SSB to a PRACH resource is supported.

[0440] For example, the first SSB received by the terminal is SSB0, SSB1, SSB2, SSB3; the second SSB received by the terminal is SSB4, SSB5, SSB6, SSB7. The first SSB combination includes: {SSB0, SSB4}, {SSB1, SSB5}, {SSB2, SSB6}, {SSB3, SSB7}. These SSB combinations are associated with or mapped to PRACH resources according to specific rules.

[0441] Alternatively, it may be possible to support only one type of SSB-to-PRACH resource mapping. For example, in the case of a first SSB and a second SSB being associated, as long as the first SSB or the second SSB is associated with a PRACH resource, the second SSB or the first SSB can naturally be indirectly associated with the corresponding PRACH resource. This simplifies the mapping relationship between resources.

[0442] In some embodiments, only the first SSB or only the second SSB is associated with the PRACH resource.

[0443] For example, the first SSB is associated with a PRACH resource, and the second SSB is associated with the first SSB. For terminals that only support the detection of the first SSB, after selecting the first SSB, the corresponding PRACH resource is directly selected. For terminals that support the detection of both SSBs, after selecting the first SSB, the second SSB is measured, and then random access is performed based on the PRACH resource associated with the first SSB and the measurement results of both SSBs (i.e., the first SSB and the second SSB).

[0444] Furthermore, if a terminal initiates random access through a first SSB or a second SSB, when duplicate transmissions or retransmissions occur, other SSBs can be considered for duplicate transmissions or retransmissions, thereby improving access performance.

[0445] In some embodiments, for retransmission or duplicate transmission of the first uplink random access message (such as Msg1 / Msg3 / MsgA), the SSB used can be switched, including at least one of the following:

[0446] The SSB on which the Pth retransmission or repeated transmission of the first uplink random access message is based is switched from the first SSB to the second SSB, or from the second SSB to the first SSB.

[0447] The SSB on which the Pth retransmission or repeated transmission of the first uplink random access message is based switches from one first SSB to another first SSB, or from one second SSB to another second SSB;

[0448] Where P is a positive integer.

[0449] When the above agreement is made, the network-side device can select the corresponding receiving beam to receive the uplink signal, thereby improving the performance of uplink transmission.

[0450] Example 4 details the technical solution of this application using the QCL reference of random access related downlink signals and the path loss reference of random access related uplink signals as examples.

[0451] Because near-field beams exhibit focusing characteristics, meaning they are highly sensitive to distance, specific design considerations are needed for relevant signals or channel QCL and pathloss reference signals during random access to improve transmission reliability. This is especially true when the terminal is moving rapidly, as the optimal beam trained during beamforming can easily fail, impacting uplink and downlink data transmission performance.

[0452] In some embodiments, taking the random access related downlink signal as the first downlink random access message (e.g., Msg2 / Msg4 / MsgB) as an example, the terminal receives the first downlink random access message (e.g., Msg2 / Msg4 / MsgB).

[0453] The QCL reference of the first downlink random access message (such as Msg2 / Msg4 / MsgB) satisfies at least one of the following:

[0454] The first downlink random access message (e.g., Msg2 / Msg4 / MsgB) has the first SSB as its QCL reference on the first QCL parameter (e.g., spatial relationship), and the second SSB determined by the terminal as its QCL reference on the second QCL parameter. For example, even if the optimal beam selected by the terminal corresponds to the second SSB, the QCL reference of the first downlink random access message on the first QCL parameter is still the first SSB associated with the second SSB.

[0455] The QCL reference for the first downlink random access message (e.g., Msg2 / Msg4 / MsgB) is the first SSB; for example, even if the optimal beam selected by the terminal corresponds to the second SSB, its QCL reference is still the first SSB associated with the second SSB.

[0456] The first downlink random access message (such as Msg2 / Msg4 / MsgB) does not have a spatial QCL reference; for example, it is only applicable to non-FR2 (high frequency) scenarios.

[0457] The QCL reference for the first downlink random access message (such as Msg2 / Msg4 / MsgB) is reported via Msg3; for example, when the terminal moves, the terminal reports a new optimal beam. When the network side transmits Msg4, the terminal's default QCL reference is its newly reported optimal beam.

[0458] The QCL reference for repeated or retransmitted transmission of the first downlink random access message (such as Msg2 / Msg4 / MsgB) is switched to the first SSB; for example, the second SSB is used as the QCL reference for the initial transmission, and when a retransmission occurs, or when the retransmission reaches a certain number of times, the QCL reference is switched to the first SSB to improve reliability.

[0459] The QCL reference for repeated or retransmitted transmission of the first downlink random access message (such as Msg2 / Msg4 / MsgB) is switched to the second SSB; for example, the first SSB is used as the QCL reference for the initial transmission, and when a retransmission occurs, or when the retransmission reaches a certain number of times, the QCL reference is switched to the second SSB to improve performance.

[0460] It should be noted that spatial relationships can also be referred to as spatial parameters, beams, transmit beams, receive beams, or transmit / receive beam pairs.

[0461] Optionally, the first QCL parameter may be, for example, a spatial relation, and the second QCL parameter may be, for example, a parameter other than a spatial relation.

[0462] For example, the QCL reference for the first downlink random access message is the first SSB. Even if the optimal beam selected by the terminal corresponds to the second SSB, its QCL reference remains the first SSB associated with the second SSB. Performance can be improved from the perspective of QCL reference reliability by avoiding using the second SSB as the QCL reference.

[0463] For example, the QCL reference for the first downlink random access message is the second SSB. Even if the optimal beam selected by the terminal corresponds to the first SSB, its QCL reference remains the second SSB associated with the first SSB. Performance can be improved from the perspective of QCL reference reliability by avoiding using the second SSB as the QCL reference.

[0464] For example, the QCL reference for the first downlink random access message on the first QCL parameter is the first SSB, and the QCL reference for the first downlink random access message on the second QCL parameter is the second SSB. For instance, even if the optimal beam selected by the terminal corresponds to the second SSB, its QCL reference on the spatial relationship (i.e., the first QCL parameter) is still the first SSB associated with the second SSB. The reliability of the QCL reference can be enhanced by avoiding the second SSB being used as the QCL reference for certain QCL parameters (such as spatial relationships), thereby improving performance.

[0465] For example, the first downlink random access message does not have a QCL reference in terms of spatial relationships. For instance, the first downlink random access message (such as Msg2 / 4 / B) does not have a QCL reference in terms of spatial relationships. For example, this only applies to non-FR2 (high frequency) scenarios.

[0466] For example, the QCL reference for the first downlink random access message is reported via message 3 of the random access procedure. When the terminal moves, it reports a new optimal beam. When the network side transmits Msg4, the terminal's default QCL reference is its newly reported optimal beam. This enhancement from the perspective of QCL update ensures that the first downlink random access message can still use the second SSB for QCL reference.

[0467] For example, the QCL reference for the S-th retransmission or repeated transmission of the first downlink random access message may be switched from the first SSB to the second SSB, or vice versa. The suitability of the QCL reference can be determined based on whether a retransmission occurs, and the QCL reference can be switched accordingly. For instance, the initial transmission may use the second SSB as the QCL reference; when a retransmission occurs, or after a certain number of retransmissions, the QCL reference may be switched to the first SSB to improve reliability. As another example, the initial transmission may use the first SSB as the QCL reference; when a retransmission occurs, or after a certain number of retransmissions, the QCL reference may be switched to the second SSB to improve performance.

[0468] It should be noted that near-field beams exhibit focusing characteristics, meaning near-field communication is highly sensitive to distance. Therefore, the QCL reference for relevant signals or channels (such as the first downlink random access message) during random access requires specific design to improve transmission reliability. Especially when the terminal is moving rapidly, the optimal beam trained during beamforming can easily fail, thus affecting the transmission performance of uplink and downlink data.

[0469] In this embodiment, the reliability of the transmission of the first downlink random access message is improved by designing a QCL reference for the first downlink random access message.

[0470] In some embodiments, when the QCL reference of the first downlink random access message is switched, the timing of retransmission or repeated transmission of the first downlink random access message after the QCL reference is switched is determined based on a first time parameter; wherein, the first time parameter is related to the switching of the QCL reference.

[0471] In this embodiment, when a QCL handover occurs, the time interval between two subsequent downlink transmissions can be further agreed upon, so that the terminal has enough time to prepare for reception.

[0472] For example, when the QCL reference is switched, an additional first time parameter is introduced, which is used to determine the transmission time of the next downlink transmission.

[0473] For example, if a QCL switch occurs during the first retransmission after the initial transmission of Msg2, then the time parameter needs to be added to the originally agreed retransmission timing to delay the retransmission and give the terminal enough time to switch the QCL reference.

[0474] Optionally, the first time parameter can also be defined as a time offset or a time delay.

[0475] The QCL relationship described in the embodiments of this application can refer to the reference relationship between two channels or signals, or between channels and signals, at the levels of time error, frequency error, Doppler frequency shift, Doppler spread, delay, delay spread, average delay, spatial filter, spatial receiving or transmitting parameters, beam, channel estimation, etc.

[0476] In some embodiments, taking the random access related uplink signal as the second uplink random access message (e.g., Msg1 / Msg3 / MsgA) as an example, the terminal sends the second uplink random access message;

[0477] Wherein, the path loss reference of the second uplink random access message satisfies one of the following:

[0478] The path loss reference for the second uplink random access message is the first SSB;

[0479] The path loss reference for the second uplink random access message is the second SSB;

[0480] The path loss reference of the second uplink random access message is reported via message 3 of the random access procedure;

[0481] The path loss reference for the Qth retransmission or repeated transmission of the second uplink random access message is switched from the first SSB to the second SSB, or from the second SSB to the first SSB; where Q is a positive integer.

[0482] Optionally, the second uplink random access message includes, but is not limited to, at least one of the following:

[0483] Message 1 (Msg 1) of the random access procedure, Message 3 (Msg 3) of the random access procedure, Message A (Msg A) of the random access procedure.

[0484] Optionally, the first uplink random access message and the second uplink random access message may be the same or different, and this application embodiment does not limit this.

[0485] For example, the path loss reference for the second uplink random access message is the first SSB. In this case, even if the optimal beam selected by the terminal corresponds to the second SSB, the path loss reference for the second uplink random access message is still the first SSB associated with the second SSB.

[0486] For example, the path loss reference for the second uplink random access message is the second SSB. In this case, even if the optimal beam selected by the terminal corresponds to the first SSB, the path loss reference for the second uplink random access message is still the second SSB associated with the first SSB.

[0487] For example, the path loss reference for the second uplink random access message is reported via message 3 in the random access procedure. For instance, when the terminal moves, it reports a new optimal beam via message 3. When the terminal transmits the second uplink random access message, the network side's default path loss reference is the newly reported optimal beam.

[0488] For example, the path loss reference for the Qth retransmission or repeated transmission of the second uplink random access message may be switched from the first SSB to the second SSB, or vice versa. For instance, the initial transmission may use the second SSB as the path loss reference, and when a retransmission occurs, or after a certain number of retransmissions, the path loss reference may be switched to the first SSB to improve reliability. Alternatively, the initial transmission may use the first SSB as the path loss reference, and when a retransmission occurs, or after a certain number of retransmissions, the path loss reference may be switched to the second SSB to improve reliability.

[0489] It should be noted that near-field beams exhibit focusing characteristics, meaning near-field communication is highly sensitive to distance. Therefore, the path loss reference signal for relevant signals or channels (such as the second uplink random access message) during random access requires specific design considerations to improve the reliability of the second uplink random access message transmission. Especially when the terminal is moving rapidly, the optimal beam trained during beamforming can easily fail, thus affecting the transmission performance of the second uplink random access message.

[0490] In this embodiment, the reliability of the transmission of the second uplink random access message is improved by designing a path loss reference for the second uplink random access message.

[0491] 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.

[0492] 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.

[0493] 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 general-purpose processors, special-purpose processors, 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.

[0494] Specifically, referring to Figure 3, when the SSB transmission device is a terminal or a component within a terminal, the SSB transmission device 300 includes:

[0495] Receiver module 301 is used to receive at least one of the first synchronization signal block SSB and the second SSB;

[0496] Wherein, the first SSB and the second SSB satisfy at least one of the following:

[0497] There is an association between the first SSB and the second SSB;

[0498] The first SSB and the second SSB correspond to different resources;

[0499] The first SSB and the second SSB have different configuration information.

[0500] In some embodiments, the first SSB and the second SSB are associated, including at least one of the following:

[0501] The first SSB and the second SSB are located in the same temporal resource window;

[0502] The first SSB and the second SSB are located in the same frequency domain resource window;

[0503] The first SSB and the second SSB occupy consecutive time-domain resources;

[0504] The first SSB and the second SSB occupy consecutive frequency domain resources;

[0505] The first SSB and the second SSB use frequency division multiplexing (FDM) on the same time domain resources;

[0506] The first SSB and the second SSB are time-division multiplexed (TDM) on the same frequency domain resources;

[0507] The first SSB and the second SSB have the same configuration information;

[0508] The first SSB and the second SSB correspond to the same group;

[0509] The index of the first SSB is consecutive to the index of the second SSB;

[0510] The index of the first SSB is calculated using the index of the second SSB;

[0511] The index of the second SSB is calculated using the index of the first SSB;

[0512] The indexes of the first SSB and the second SSB are related to the first parameter, wherein the first parameter includes at least one of the following: direction identifier ID, beam identifier ID, distance identifier ID, and cell identifier ID.

[0513] In some embodiments, the first SSB and the second SSB correspond to different resources, including at least one of the following:

[0514] The first SSB and the second SSB correspond to different SSB groups;

[0515] The first SSB and the second SSB correspond to different SSB indices;

[0516] The first SSB and the second SSB correspond to different SSB time-domain resources;

[0517] The first SSB and the second SSB correspond to different SSB frequency domain resources.

[0518] In some embodiments, the first SSB is an on-demand SSB; and / or,

[0519] The second SSB is an on-demand SSB.

[0520] In some embodiments, the activation conditions for the on-demand SSB include at least one of the following:

[0521] The number of failed random access attempts based on non-on-demand SSB is greater than or equal to the first threshold.

[0522] The number of beam selection failures based on non-on-demand SSB is greater than or equal to the second threshold.

[0523] In some embodiments, the SSB transmission device 300 further includes: a processing module 302;

[0524] The processing module 302 is used to identify at least one of the first SSB and the second SSB based on the first information; or...

[0525] The processing module 302 is used to determine the association relationship between the first SSB and the second SSB based on the first information;

[0526] The first information includes at least one of the following:

[0527] SSB synchronization sequence;

[0528] SSB demodulation reference signal DMRS;

[0529] Master Information Block (MIB);

[0530] System Information Block (SIB);

[0531] Layer 1 load;

[0532] The default convention for SSB time-domain resources;

[0533] The default SSB frequency domain resources.

[0534] In some embodiments, the receiving module 301 is specifically used for:

[0535] Based on the priority order between the first SSB and the second SSB, the first SSB or the second SSB is received first.

[0536] In some embodiments, the receiving module 301 is specifically used for:

[0537] The second SSB is received based on at least one of the second information and the first condition;

[0538] The second information includes at least one of the following: the location of the SSB's transmission device 300, the type of the SSB's transmission device 300, the capability of the SSB's transmission device 300, the transmission mode of the SSB's transmission device 300, network-side indications, and relevant parameters of the first SSB.

[0539] The first condition includes at least one of the following: the measurement result of the transmission device 300 of the SSB on the first SSB is less than or equal to a third threshold, the number of reception failures of the random access response RAR corresponding to message 1 of the random access procedure initiated based on the first SSB is greater than or equal to a fourth threshold, and the RAR indicates that the second SSB is received.

[0540] In some embodiments, when the SSB transmission device 300 receives the second SSB, the SSB transmission device 300 further includes: a processing module 302;

[0541] The processing module 302 is used to determine the received second SSB according to at least one of the network side indication signaling and the distance-related information of the transmission device 300 of the SSB, based on the default protocol agreement.

[0542] The network-side indication signaling includes at least one of the following: MIB, SIB1, RAR, message 4 of the random access procedure, and MAC-CE signaling of the media access control unit.

[0543] In some embodiments, the receiving module 301 is specifically configured to perform one of the following:

[0544] Receive at least one of the first SSB and the second SSB before initiating random access;

[0545] The first SSB is received before initiating random access, and the second SSB is received before sending message 3 of the random access procedure;

[0546] The first SSB is received before initiating random access, and the second SSB is received before receiving RAR;

[0547] The first SSB is received before initiating random access, and the second SSB is received before receiving message 4 of the random access procedure;

[0548] The first SSB is received before initiating random access, and the second SSB is received before receiving message B of the random access procedure.

[0549] In some embodiments, the SSB transmission device 300 further includes:

[0550] The sending module 303 is used to report the first capability;

[0551] The first capability includes at least one of the following:

[0552] The transmission device 300 of the SSB supports receiving the first SSB;

[0553] The transmission device 300 of the SSB supports receiving the second SSB;

[0554] The transmission device 300 of the SSB supports near-field communication.

[0555] In some embodiments, at least one of the first SSB and the second SSB is associated with the Physical Random Access Channel (PRACH);

[0556] Wherein, the association between at least one of the first SSB and the second SSB and the PRACH satisfies at least one of the following:

[0557] The first SSB and the second SSB are associated with resources determined by different PRACH configurations;

[0558] The first SSB and the second SSB are associated with the same PRACH configuration-defined resources;

[0559] The first SSB and the second SSB are associated with different random access preambles;

[0560] The first SSB and the second SSB are associated with different random access opportunities (ROs).

[0561] The first SSB and the second SSB associated with the first SSB belong to the same RO group;

[0562] The combination of the first SSB and the second SSB is associated with a PRACH resource;

[0563] Only the first SSB is associated with PRACH resources;

[0564] Only the second SSB is associated with the PRACH resource.

[0565] In some embodiments, when the first SSB and the second SSB are associated with different random access preambles, or when the first SSB and the second SSB are associated with different resources determined by PRACH configurations, the random access preambles associated with the first SSB and the second SSB satisfy at least one of the following:

[0566] The length of the random access preamble associated with the first SSB is greater than the length of the random access preamble associated with the second SSB;

[0567] The peak-to-average power ratio (PAPR) of the random access preamble associated with the first SSB is less than that of the random access preamble associated with the second SSB.

[0568] The number of repetitions of the random access preamble associated with the first SSB is greater than the number of repetitions of the random access preamble associated with the second SSB.

[0569] In some embodiments, the SSB transmission device 300 further includes:

[0570] Sending module 303 is used to send the first uplink random access message;

[0571] Wherein, the first uplink random access message satisfies one of the following:

[0572] The SSB on which the Pth retransmission or repeated transmission of the first uplink random access message is based is switched from the first SSB to the second SSB, or from the second SSB to the first SSB.

[0573] The SSB on which the Pth retransmission or repeated transmission of the first uplink random access message is based switches from one first SSB to another first SSB, or from one second SSB to another second SSB;

[0574] Where P is a positive integer.

[0575] In some embodiments, the SSB transmission device 300 further includes:

[0576] Sending module 303 is used to send a second uplink random access message;

[0577] Wherein, the path loss reference of the second uplink random access message satisfies one of the following:

[0578] The path loss reference for the second uplink random access message is the first SSB;

[0579] The path loss reference for the second uplink random access message is the second SSB;

[0580] The path loss reference of the second uplink random access message is reported via message 3 of the random access procedure;

[0581] The path loss reference for the Qth retransmission or repeated transmission of the second uplink random access message is switched from the first SSB to the second SSB, or from the second SSB to the first SSB; where Q is a positive integer.

[0582] In some embodiments, the receiving module 301 is further configured to receive a first downlink random access message;

[0583] Wherein, the quasi-co-address QCL reference of the first downlink random access message satisfies one of the following:

[0584] The QCL reference of the first downlink random access message is the first SSB;

[0585] The QCL reference of the first downlink random access message is the second SSB;

[0586] The first downlink random access message uses the first SSB as its QCL reference on the first QCL parameter, and the first downlink random access message uses the second SSB as its QCL reference on the second QCL parameter.

[0587] The first downlink random access message does not have the QCL reference in the spatial relationship parameter;

[0588] The QCL reference of the first downlink random access message is reported via message 3 of the random access procedure;

[0589] The QCL reference for the Sth retransmission or repeated transmission of the first downlink random access message is switched from the first SSB to the second SSB, or from the second SSB to the first SSB; where S is a positive integer.

[0590] In some embodiments, when the QCL reference of the first downlink random access message is switched, the timing of retransmission or retransmission of the first downlink random access message is determined based on a first time parameter after the QCL reference is switched.

[0591] The first time parameter is related to the switching of the QCL reference.

[0592] Therefore, in this embodiment, the terminal receives at least one of the first SSB and the second SSB; wherein the first SSB and the second SSB satisfy at least one of the following: there is an association between the first SSB and the second SSB, the first SSB and the second SSB correspond to different resources, and the first SSB and the second SSB correspond to different configuration information. For example, the first SSB and the second SSB can respectively correspond to beam management in two dimensions (such as direction dimension and distance dimension), thereby improving the efficiency and performance of beam management and reducing the processing complexity of the terminal.

[0593] Specifically, referring to Figure 4, when the SSB transmission device is a network-side device or a component within a network-side device, the SSB transmission device 400 includes:

[0594] The transmitting module 401 is used to transmit at least one of the first synchronization signal block SSB and the second SSB;

[0595] Wherein, the first SSB and the second SSB satisfy at least one of the following:

[0596] There is an association between the first SSB and the second SSB;

[0597] The first SSB and the second SSB correspond to different resources;

[0598] The first SSB and the second SSB have different configuration information.

[0599] In some embodiments, the first SSB and the second SSB are associated, including at least one of the following:

[0600] The first SSB and the second SSB are located in the same temporal resource window;

[0601] The first SSB and the second SSB are located in the same frequency domain resource window;

[0602] The first SSB and the second SSB occupy consecutive time-domain resources;

[0603] The first SSB and the second SSB occupy consecutive frequency domain resources;

[0604] The first SSB and the second SSB use frequency division multiplexing (FDM) on the same time domain resources;

[0605] The first SSB and the second SSB are time-division multiplexed (TDM) on the same frequency domain resources;

[0606] The first SSB and the second SSB have the same configuration information;

[0607] The first SSB and the second SSB correspond to the same group;

[0608] The index of the first SSB is consecutive to the index of the second SSB;

[0609] The index of the first SSB is calculated using the index of the second SSB;

[0610] The index of the second SSB is calculated using the index of the first SSB;

[0611] The indexes of the first SSB and the second SSB are related to the first parameter, wherein the first parameter includes at least one of the following: direction identifier ID, beam identifier ID, distance identifier ID, and cell identifier ID.

[0612] In some embodiments, the first SSB and the second SSB correspond to different resources, including at least one of the following:

[0613] The first SSB and the second SSB correspond to different SSB groups;

[0614] The first SSB and the second SSB correspond to different SSB indices;

[0615] The first SSB and the second SSB correspond to different SSB time-domain resources;

[0616] The first SSB and the second SSB correspond to different SSB frequency domain resources.

[0617] In some embodiments, the first SSB is an on-demand SSB; and / or,

[0618] The second SSB is an on-demand SSB.

[0619] In some embodiments, the activation conditions for the on-demand SSB include at least one of the following:

[0620] The number of failed random access attempts based on non-on-demand SSB is greater than or equal to the first threshold.

[0621] The number of beam selection failures based on non-on-demand SSB is greater than or equal to the second threshold.

[0622] In some embodiments, the sending module 401 is further configured to send first information;

[0623] Wherein, the first information is used to indicate at least one of the first SSB and the second SSB, or the first information is used to indicate the association relationship that exists between the first SSB and the second SSB;

[0624] The first information includes at least one of the following:

[0625] SSB synchronization sequence;

[0626] SSB demodulation reference signal DMRS;

[0627] Master Information Block (MIB);

[0628] System Information Block (SIB);

[0629] Layer 1 load.

[0630] In some embodiments, the SSB transmission device 400 further includes:

[0631] The receiving module 402 is used to receive the report of the first capability from the terminal;

[0632] The first capability includes at least one of the following:

[0633] The terminal supports receiving the first SSB;

[0634] The terminal supports receiving the second SSB;

[0635] The terminal supports near-field communication.

[0636] In some embodiments, at least one of the first SSB and the second SSB is associated with the Physical Random Access Channel (PRACH);

[0637] Wherein, the association between at least one of the first SSB and the second SSB and the PRACH satisfies at least one of the following:

[0638] The first SSB and the second SSB are associated with resources determined by different PRACH configurations;

[0639] The first SSB and the second SSB are associated with the same PRACH configuration-defined resources;

[0640] The first SSB and the second SSB are associated with different random access preambles;

[0641] The first SSB and the second SSB are associated with different random access opportunities (ROs).

[0642] The first SSB and the second SSB associated with the first SSB belong to the same RO group;

[0643] The combination of the first SSB and the second SSB is associated with a PRACH resource;

[0644] Only the first SSB is associated with PRACH resources;

[0645] Only the second SSB is associated with the PRACH resource.

[0646] In some embodiments, when the first SSB and the second SSB are associated with different random access preambles, or when the first SSB and the second SSB are associated with different resources determined by PRACH configurations, the random access preambles associated with the first SSB and the second SSB satisfy at least one of the following:

[0647] The length of the random access preamble associated with the first SSB is greater than the length of the random access preamble associated with the second SSB;

[0648] The peak-to-average power ratio (PAPR) of the random access preamble associated with the first SSB is less than that of the random access preamble associated with the second SSB.

[0649] The number of repetitions of the random access preamble associated with the first SSB is greater than the number of repetitions of the random access preamble associated with the second SSB.

[0650] In some embodiments, the SSB transmission device 400 further includes:

[0651] The receiving module 402 is used to receive a first uplink random access message from the terminal;

[0652] Wherein, the first uplink random access message satisfies one of the following:

[0653] The SSB on which the Pth retransmission or repeated transmission of the first uplink random access message is based is switched from the first SSB to the second SSB, or from the second SSB to the first SSB.

[0654] The SSB on which the Pth retransmission or repeated transmission of the first uplink random access message is based switches from one first SSB to another first SSB, or from one second SSB to another second SSB;

[0655] Where P is a positive integer.

[0656] In some embodiments, the SSB transmission device 400 further includes:

[0657] The receiving module 402 is used to receive a second uplink random access message from the terminal;

[0658] Wherein, the path loss reference of the second uplink random access message satisfies one of the following:

[0659] The path loss reference for the second uplink random access message is the first SSB;

[0660] The path loss reference for the second uplink random access message is the second SSB;

[0661] The path loss reference of the second uplink random access message is reported via message 3 of the random access procedure;

[0662] The path loss reference for the Qth retransmission or repeated transmission of the second uplink random access message is switched from the first SSB to the second SSB, or from the second SSB to the first SSB; where Q is a positive integer.

[0663] In some embodiments, the sending module 401 is further configured to send a first downlink random access message to the terminal;

[0664] Wherein, the quasi-co-address QCL reference of the first downlink random access message satisfies one of the following:

[0665] The QCL reference of the first downlink random access message is the first SSB;

[0666] The QCL reference of the first downlink random access message is the second SSB;

[0667] The first downlink random access message uses the first SSB as its QCL reference on the first QCL parameter, and the first downlink random access message uses the second SSB as its QCL reference on the second QCL parameter.

[0668] The first downlink random access message does not have the QCL reference in the spatial relationship parameter;

[0669] The QCL reference of the first downlink random access message is reported via message 3 of the random access procedure;

[0670] The QCL reference for the Sth retransmission or repeated transmission of the first downlink random access message is switched from the first SSB to the second SSB, or from the second SSB to the first SSB; where S is a positive integer.

[0671] In some embodiments, when the QCL reference of the first downlink random access message is switched, the timing of retransmission or retransmission of the first downlink random access message is determined based on a first time parameter after the QCL reference is switched.

[0672] The first time parameter is related to the switching of the QCL reference.

[0673] Therefore, in this embodiment, the network-side device sends at least one of the first SSB and the second SSB; wherein the first SSB and the second SSB satisfy at least one of the following: there is an association between the first SSB and the second SSB, the first SSB and the second SSB correspond to different resources, and the first SSB and the second SSB correspond to different configuration information. For example, the first SSB and the second SSB can respectively correspond to beam management in two dimensions (such as direction dimension and distance dimension), thereby improving the efficiency and performance of beam management and reducing the processing complexity of the terminal.

[0674] The SSB transmission device provided in this application embodiment can implement the various processes implemented in the method embodiment of FIG2 and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0675] As shown in Figure 5, this application embodiment also provides a communication device 500, including a processor 501 and a memory 502, wherein the memory 502 stores a program or instructions that can be run on the processor 501.

[0676] For example, when the communication device 500 is a terminal, the program or instruction executed by the processor 501 implements the various steps executed by the terminal in the above-mentioned SSB transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0677] For example, when the communication device 500 is a network-side device, when the program or instruction is executed by the processor 501, it implements the various steps executed by the network-side device in the above-mentioned SSB transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0678] This application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps in the method embodiment shown in FIG2. This terminal embodiment corresponds to the above-described terminal-side method embodiment, and all implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and can achieve the same technical effect. The terminal can be the SSB transmission device 300 shown in FIG3.

[0679] Specifically, Figure 6 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of this application.

[0680] 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.

[0681] Those skilled in the art will understand that terminal 600 may also include a power supply (such as a battery) for powering various components. The power supply can be logically connected to processor 610 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The terminal structure shown in Figure 6 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.

[0682] 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.

[0683] 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.

[0684] 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.

[0685] 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.

[0686] In some embodiments, the radio frequency unit 601 is configured to receive at least one of a first SSB and a second SSB;

[0687] Wherein, the first SSB and the second SSB satisfy at least one of the following:

[0688] There is an association between the first SSB and the second SSB;

[0689] The first SSB and the second SSB correspond to different resources;

[0690] The first SSB and the second SSB have different configuration information.

[0691] Therefore, in this embodiment, the terminal receives at least one of the first SSB and the second SSB; wherein the first SSB and the second SSB satisfy at least one of the following: there is an association between the first SSB and the second SSB, the first SSB and the second SSB correspond to different resources, and the first SSB and the second SSB correspond to different configuration information. For example, the first SSB and the second SSB can respectively correspond to beam management in two dimensions (such as direction dimension and distance dimension), thereby improving the efficiency and performance of beam management and reducing the processing complexity of the terminal.

[0692] 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.

[0693] This application also provides a network-side device, including a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps of the method embodiment shown in FIG2. This network-side device embodiment corresponds to the method embodiment executed by the above-described network-side device. 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.

[0694] This application embodiment also provides a network-side device, which can be the SSB transmission device 400 shown in FIG4. Specifically, as shown in FIG7, the network-side device 700 includes: an antenna 71, a radio frequency device 72, a baseband device 73, a processor 74, and a memory 75. The antenna 71 is connected to the radio frequency device 72. In the uplink direction, the radio frequency device 72 receives information through the antenna 71 and sends the received information to the baseband device 73 for processing. In the downlink direction, the baseband device 73 processes the information to be transmitted and sends it to the radio frequency device 72. The radio frequency device 72 processes the received information and transmits it through the antenna 71.

[0695] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 73, which includes a baseband processor.

[0696] The baseband device 73 may include at least one baseband board, on which multiple chips are disposed, as shown in FIG7. One of the chips is, for example, a baseband processor, which is connected to the memory 75 via a bus interface to call the program in the memory 75 and execute the operation of the network-side device shown in the above method embodiment.

[0697] The network-side device may also include a network interface 76, such as a Common Public Radio Interface (CPRI).

[0698] Specifically, the network-side device 700 in this application embodiment further includes: instructions or programs stored in memory 75 and executable on processor 74. Processor 74 calls the instructions or programs in memory 75 to execute the methods executed by each module shown in FIG4 and achieve the same technical effect. To avoid repetition, it will not be described in detail here.

[0699] In some embodiments, the radio frequency device 72 is used to transmit at least one of the first SSB and the second SSB;

[0700] Wherein, the first SSB and the second SSB satisfy at least one of the following:

[0701] There is an association between the first SSB and the second SSB;

[0702] The first SSB and the second SSB correspond to different resources;

[0703] The first SSB and the second SSB have different configuration information.

[0704] Therefore, in this embodiment, the network-side device sends at least one of the first SSB and the second SSB; wherein the first SSB and the second SSB satisfy at least one of the following: there is an association between the first SSB and the second SSB, the first SSB and the second SSB correspond to different resources, and the first SSB and the second SSB correspond to different configuration information. For example, the first SSB and the second SSB can respectively correspond to beam management in two dimensions (such as direction dimension and distance dimension), thereby improving the efficiency and performance of beam management and reducing the processing complexity of the terminal.

[0705] 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 effects. To avoid repetition, they will not be described again here.

[0706] The processor mentioned above is the processor in the terminal or network-side device described in the above embodiments. 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.

[0707] 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.

[0708] 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.

[0709] 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.

[0710] This application also provides a wireless communication system, including: a terminal and a network-side device. The terminal can be used to perform the steps executed by the terminal in the SSB transmission method described above, and the network-side device can be used to perform the steps executed by the network-side device in the SSB transmission method described above.

[0711] 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.

[0712] 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 includes several instructions to cause the terminal or network-side device to execute the methods described in the various embodiments of this application.

[0713] 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 SSBs, comprising: receiving, by a terminal, at least one of a first synchronization signal block (SSB) and a second SSB; wherein the first SSB and the second SSB satisfy at least one of the following: an association relationship exists between the first SSB and the second SSB; the first SSB and the second SSB correspond to different resources; the first SSB and the second SSB correspond to different configuration information.

2. The method of claim 1, wherein, The association relationship between the first SSB and the second SSB includes at least one of the following: the first SSB and the second SSB are located in a same time domain resource window; the first SSB and the second SSB are located in a same frequency domain resource window; the first SSB and the second SSB occupy continuous time domain resources; the first SSB and the second SSB occupy continuous frequency domain resources; the first SSB and the second SSB are frequency division multiplexed (FDM) on a same time domain resource; the first SSB and the second SSB are time division multiplexed (TDM) on a same frequency domain resource; the first SSB and the second SSB correspond to same configuration information; the first SSB and the second SSB correspond to same grouping; an index of the first SSB is continuous with an index of the second SSB; the index of the first SSB is calculated by the index of the second SSB; the index of the second SSB is calculated by the index of the first SSB; the index of the first SSB and the index of the second SSB are related to a first parameter, wherein the first parameter includes at least one of a direction identifier (ID), a beam identifier (ID), a distance identifier (ID), and a cell identifier (ID).

3. The method of claim 1, wherein, The first SSB and the second SSB correspond to different resources, including at least one of the following: the first SSB and the second SSB correspond to different groupings of SSBs; the first SSB and the second SSB correspond to different indexes of SSBs; the first SSB and the second SSB correspond to different time domain resources of SSBs; the first SSB and the second SSB correspond to different frequency domain resources of SSBs. 4.The method of any one of claims 1-3, wherein: the first SSB is an on-demand SSB; and / or the second SSB is an on-demand SSB.

5. The method of claim 4, wherein, An activation condition of the on-demand SSB includes at least one of the following: a number of failures of random access based on a non-on-demand SSB is greater than or equal to a first threshold value; a number of failures of beam selection based on a non-on-demand SSB is greater than or equal to a second threshold value.

6. The method according to any one of claims 1 to 5, wherein, The method further includes: identifying, by the terminal, at least one of the first SSB and the second SSB based on first information; or determining, by the terminal, the association relationship existing between the first SSB and the second SSB based on first information; wherein the first information includes at least one of the following: a synchronization sequence of an SSB; a demodulation reference signal (DMRS) of an SSB; a master information block (MIB); a system information block (SIB); a layer 1 load; a default agreed SSB time domain resource; a default agreed SSB frequency domain resource.

7. The method of any one of claims 1-6, wherein the terminal receiving at least one of the first SSB and the second SSB comprises: the terminal receiving the first SSB or the second SSB according to a priority order between the first SSB and the second SSB.

8. The method of any one of claims 1-7, wherein the terminal receiving at least one of the first SSB and the second SSB comprises: the terminal receiving the second SSB according to at least one of second information and a first condition; wherein the second information comprises at least one of: a location of the terminal, a type of the terminal, a capability of the terminal, a transmission mode of the terminal, an indication of a network side, and a related parameter of the first SSB; the first condition comprises at least one of: a measurement result of the terminal on the first SSB being less than or equal to a third threshold, a number of receiving failures of a random access response (RAR) corresponding to a message 1 of a random access procedure initiated based on the first SSB being greater than or equal to a fourth threshold, and the RAR indicating receiving the second SSB.

9. The method of any one of claims 1-8, wherein, in a case that the terminal receives the second SSB, the method further comprises: the terminal determining the received second SSB according to at least one of a protocol default agreement, a network side indication signaling, and distance related information of the terminal; wherein the network side indication signaling comprises at least one of: a master information block (MIB), a system information block 1 (SIB1), a RAR, a message 4 of a random access procedure, and a medium access control control element (MAC-CE) signaling. the terminal receiving at least one of the first SSB and the second SSB comprises one of: the terminal receiving at least one of the first SSB and the second SSB before initiating a random access; the terminal receiving the first SSB before initiating the random access, and the terminal receiving the second SSB before transmitting a message 3 of a random access procedure; 10. The method of any one of claims 1 to 9, wherein, the terminal receiving the first SSB before initiating the random access, and the terminal receiving the second SSB before receiving a RAR; the terminal receiving the first SSB before initiating the random access, and the terminal receiving the second SSB before receiving a message 4 of a random access procedure; the terminal receiving the first SSB before initiating the random access, and the terminal receiving the second SSB before receiving a message B of a random access procedure. the method further comprises: the terminal reporting a first capability; wherein the first capability comprises at least one of:

11. The method of any one of claims 1 to 10, wherein, the terminal supporting receiving the first SSB; the terminal supporting receiving the second SSB; the terminal supporting near field communication. at least one of the first SSB and the second SSB is associated with a physical random access channel (PRACH); wherein an association relationship between at least one of the first SSB and the second SSB and the PRACH satisfies at least one of: the first SSB and the second SSB are associated with different resources determined by PRACH configurations; and 12. The method of any one of claims 1 to 11, wherein, the first SSB and the second SSB are associated with different PRACH configurations. ​ ​ The first SSB and the second SSB are associated with same PRACH configuration determined resource; The first SSB and the second SSB are associated with different random access preambles; The first SSB and the second SSB are associated with different random access occasions ROs; The first SSB and the second SSB are associated with same RO group; The first SSB and the second SSB are associated with one PRACH resource; Only the first SSB is associated with PRACH resource; Only the second SSB is associated with PRACH resource.

13. The method of claim 12, wherein, In the case that the first SSB and the second SSB are associated with different random access preambles, or the first SSB and the second SSB are associated with different PRACH configuration determined resource, the random access preambles associated with the first SSB and the second SSB satisfy at least one of the following: The length of the random access preamble associated with the first SSB is greater than the length of the random access preamble associated with the second SSB; The peak-to-average power ratio (PAPR) of the random access preamble associated with the first SSB is less than the PAPR of the random access preamble associated with the second SSB; The repetition number of the random access preamble associated with the first SSB is greater than the repetition number of the random access preamble associated with the second SSB.

14. The method of any one of claims 1 to 13, wherein, The method further comprises: The terminal sends a first uplink random access message; The first uplink random access message satisfies one of the following: The SSB based on which the Pth retransmission or repeated transmission of the first uplink random access message switches from the first SSB to the second SSB, or switches from the second SSB to the first SSB; The SSB based on which the Pth retransmission or repeated transmission of the first uplink random access message switches from one first SSB to another first SSB, or switches from one second SSB to another second SSB; Wherein P is a positive integer.

15. The method of any one of claims 1 to 14, wherein, The method further comprises: The terminal sends a second uplink random access message; The path loss reference of the second uplink random access message satisfies one of the following: The path loss reference of the second uplink random access message is the first SSB; The path loss reference of the second uplink random access message is the second SSB; The path loss reference of the second uplink random access message is reported through message 3 of the random access procedure; The path loss reference of the Qth retransmission or repeated transmission of the second uplink random access message switches from the first SSB to the second SSB, or switches from the second SSB to the first SSB; wherein Q is a positive integer.

16. The method of any one of claims 1 to 13, wherein, The method further comprises: The terminal receives a first downlink random access message; The quasi co-location (QCL) reference of the first downlink random access message satisfies one of the following: The QCL reference of the first downlink random access message is the first SSB; The QCL reference of the first downlink random access message is the second SSB; The QCL reference of the first downlink random access message on a first QCL parameter is the first SSB, and the QCL reference of the first downlink random access message on a second QCL parameter is the second SSB; The first downlink random access message does not have the QCL reference on a spatial relation parameter; The QCL reference of the first downlink random access message is reported through a message 3 of a random access procedure; The QCL reference of the S-th retransmission or repeated transmission of the first downlink random access message is switched from the first SSB to the second SSB or from the second SSB to the first SSB; wherein S is a positive integer.

17. The method of claim 16, wherein, In the case where the QCL reference of the first downlink random access message is switched, after the QCL reference is switched, a retransmission or repeated transmission occasion of the first downlink random access message is determined based on a first time parameter; The first time parameter is related to the switching of the QCL reference.

18. A transmission method of a synchronization signal block (SSB), comprising: A network-side device transmits at least one of a first synchronization signal block (SSB) and a second SSB; The first SSB and the second SSB satisfy at least one of the following: There is an association relationship between the first SSB and the second SSB; The first SSB and the second SSB correspond to different resources; The first SSB and the second SSB correspond to different configuration information.

19. The method of claim 18, wherein, There is an association relationship between the first SSB and the second SSB, including at least one of the following: The first SSB and the second SSB are located in the same time domain resource window; The first SSB and the second SSB are located in the same frequency domain resource window; The first SSB and the second SSB occupy continuous time domain resources; The first SSB and the second SSB occupy continuous frequency domain resources; The first SSB and the second SSB are frequency division multiplexed (FDM) on the same time domain resource; The first SSB and the second SSB are time division multiplexed (TDM) on the same frequency domain resource; The first SSB and the second SSB correspond to the same configuration information; The first SSB and the second SSB correspond to the same group; The index of the first SSB is continuous with the index of the second SSB; The index of the first SSB is calculated by the index of the second SSB; The index of the second SSB is calculated by the index of the first SSB; The index of the first SSB and the index of the second SSB are related to a first parameter, wherein the first parameter includes at least one of a direction identifier (ID), a beam identifier (ID), a distance identifier (ID), and a cell identifier (ID).

20. The method of claim 18, wherein, The first SSB and the second SSB correspond to different resources, including at least one of the following: The first SSB and the second SSB correspond to different groups of SSBs; The first SSB and the second SSB correspond to different indexes of SSBs; The first SSB and the second SSB correspond to different time domain resources of SSBs. The first SSB and the second SSB correspond to different frequency domain resources of SSBs.

21. The method of any one of claims 18-20, wherein, The first SSB is an on-demand SSB; and / or, The second SSB is an on-demand SSB.

22. The method of claim 21, wherein, The activation condition of the on-demand SSB comprises at least one of: A number of failures of random access based on a non-on-demand SSB is greater than or equal to a first threshold value; A number of failures of beam selection based on a non-on-demand SSB is greater than or equal to a second threshold value.

23. The method of any one of claims 18 to 22, wherein, The method further comprises: The network-side device sends first information; The first information is used to indicate at least one of the first SSB and the second SSB, or the first information is used to indicate the association relationship existing between the first SSB and the second SSB; The first information comprises at least one of: A synchronization sequence of SSB; A demodulation reference signal DMRS of SSB; A master information block MIB; A system information block SIB; A layer 1 load.

24. The method of any one of claims 18-23, wherein, The method further comprises: The network-side device receives a report of a first capability from a terminal; The first capability comprises at least one of: The terminal supports receiving the first SSB; The terminal supports receiving the second SSB; The terminal supports near field communication.

25. The method of any one of claims 18-24, wherein, At least one of the first SSB and the second SSB is associated with a physical random access channel PRACH; The association relationship between at least one of the first SSB and the second SSB and the PRACH satisfies at least one of: The first SSB and the second SSB are associated with different PRACH configuration determined resources; The first SSB and the second SSB are associated with the same PRACH configuration determined resource; The first SSB and the second SSB are associated with different random access preambles; The first SSB and the second SSB are associated with different random access occasions ROs; The first SSB and the second SSB associated with the second SSB correspond to the same RO group; The combination of the first SSB and the second SSB is associated with one PRACH resource; Only the first SSB is associated with a PRACH resource; Only the second SSB is associated with a PRACH resource.

26. The method of claim 25, wherein, In the case that the first SSB and the second SSB are associated with different random access preambles, or the first SSB and the second SSB are associated with different PRACH configuration determined resources, the random access preambles associated with the first SSB and the second SSB satisfy at least one of: The length of the random access preamble associated with the first SSB is greater than the length of the random access preamble associated with the second SSB; The peak average power ratio PAPR of the random access preamble associated with the first SSB is less than the PAPR of the random access preamble associated with the second SSB; The number of repetitions of the random access preamble associated with the first SSB is greater than the number of repetitions of the random access preamble associated with the second SSB.

27. The method of any one of claims 18-26, wherein, The method further includes: The network-side device receives a first uplink random access message from the terminal; Wherein, the first uplink random access message satisfies one of the following: The SSB on which the Pth retransmission or repeated transmission of the first uplink random access message is based is switched from the first SSB to the second SSB, or from the second SSB to the first SSB. The SSB on which the Pth retransmission or repeated transmission of the first uplink random access message is based switches from one first SSB to another first SSB, or from one second SSB to another second SSB; Where P is a positive integer.

28. The method of any one of claims 18-27, wherein, The method further includes: The network-side device receives a second uplink random access message from the terminal; Wherein, the path loss reference of the second uplink random access message satisfies one of the following: The path loss reference for the second uplink random access message is the first SSB; The path loss reference for the second uplink random access message is the second SSB; The path loss reference of the second uplink random access message is reported via message 3 of the random access procedure; The path loss reference for the Qth retransmission or repeated transmission of the second uplink random access message is switched from the first SSB to the second SSB, or from the second SSB to the first SSB; where Q is a positive integer.

29. The method of any one of claims 18 to 28, wherein, The method further includes: The network-side device sends a first downlink random access message to the terminal; Wherein, the quasi-co-address QCL reference of the first downlink random access message satisfies one of the following: The QCL reference of the first downlink random access message is the first SSB; The QCL reference of the first downlink random access message is the second SSB; The first downlink random access message uses the first SSB as its QCL reference on the first QCL parameter, and the first downlink random access message uses the second SSB as its QCL reference on the second QCL parameter. The first downlink random access message does not have the QCL reference in the spatial relationship parameter; The QCL reference of the first downlink random access message is reported via message 3 of the random access procedure; The QCL reference for the Sth retransmission or repeated transmission of the first downlink random access message is switched from the first SSB to the second SSB, or from the second SSB to the first SSB; where S is a positive integer.

30. A transmission device for an SSB, comprising: A receiving module is used to receive at least one of a first synchronization signal block (SSB) and a second SSB. Wherein, the first SSB and the second SSB satisfy at least one of the following: There is an association between the first SSB and the second SSB; The first SSB and the second SSB correspond to different resources; The first SSB and the second SSB have different configuration information.

31. The apparatus of claim 30, wherein, The first SSB and the second SSB are associated, including at least one of the following: The first SSB and the second SSB are located in the same temporal resource window; The first SSB and the second SSB are located in the same frequency domain resource window; The first SSB and the second SSB occupy consecutive time-domain resources; The first SSB and the second SSB occupy consecutive frequency domain resources; The first SSB and the second SSB use frequency division multiplexing (FDM) on the same time domain resources; The first SSB and the second SSB are time-division multiplexed (TDM) on the same frequency domain resources; The first SSB and the second SSB have the same configuration information; The first SSB and the second SSB correspond to the same group; The index of the first SSB is consecutive to the index of the second SSB; The index of the first SSB is calculated using the index of the second SSB; The index of the second SSB is calculated using the index of the first SSB; The indexes of the first SSB and the second SSB are related to the first parameter, wherein the first parameter includes at least one of the following: direction identifier ID, beam identifier ID, distance identifier ID, and cell identifier ID.

32. The apparatus of claim 30 or 31, wherein, The transmission device of the SSB also includes: a processing module; The processing module is configured to identify at least one of the first SSB and the second SSB based on the first information; or, the processing module is configured to determine the association relationship between the first SSB and the second SSB based on the first information. The first information includes at least one of the following: SSB synchronization sequence; SSB demodulation reference signal DMRS; Master Information Block (MIB); System Information Block (SIB); Layer 1 load; The default convention for SSB time-domain resources; The default SSB frequency domain resources.

33. The apparatus according to any one of claims 30 to 32, wherein, The receiving module is specifically used for: The second SSB is received based on at least one of the second information and the first condition; The second information includes at least one of the following: the location of the SSB's transmission device, the type of the SSB's transmission device, the capability of the SSB's transmission device, the transmission mode of the SSB's transmission device, network-side indications, and relevant parameters of the first SSB. The first condition includes at least one of the following: the measurement result of the transmission device of the SSB on the first SSB is less than or equal to a third threshold, the number of reception failures of the random access response RAR corresponding to message 1 of the random access procedure initiated based on the first SSB is greater than or equal to a fourth threshold, and the RAR indicates that the second SSB is received.

34. The apparatus according to any one of claims 30 to 33, wherein, When the transmission device of the SSB receives the second SSB, the transmission device of the SSB further includes: The processing module is used to determine the received second SSB according to at least one of the network-side indication signaling and the distance-related information of the transmission device of the SSB, based on the default protocol agreement. The network-side indication signaling includes at least one of the following: MIB, SIB1, RAR, message 4 of the random access procedure, and MAC-CE signaling of the Media Access Control Unit.

35. The apparatus of any one of claims 30-34, wherein, At least one of the first SSB and the second SSB is associated with the Physical Random Access Channel (PRACH); Wherein, the association between at least one of the first SSB and the second SSB and the PRACH satisfies at least one of the following: The first SSB and the second SSB are associated with resources determined by different PRACH configurations; The first SSB and the second SSB are associated with the same PRACH configuration-defined resources; The first SSB and the second SSB are associated with different random access preambles; The first SSB and the second SSB are associated with different random access opportunities (ROs). The first SSB and the second SSB associated with the first SSB belong to the same RO group; The combination of the first SSB and the second SSB is associated with a PRACH resource; Only the first SSB is associated with PRACH resources; Only the second SSB is associated with the PRACH resource.

36. The apparatus of any one of claims 30-35, wherein, The transmission device of the SSB also includes: The sending module is used to send the first uplink random access message; Wherein, the first uplink random access message satisfies one of the following: The SSB on which the Pth retransmission or repeated transmission of the first uplink random access message is based is switched from the first SSB to the second SSB, or from the second SSB to the first SSB. The SSB on which the Pth retransmission or repeated transmission of the first uplink random access message is based switches from one first SSB to another first SSB, or from one second SSB to another second SSB; Where P is a positive integer.

37. The apparatus of any one of claims 30-36, wherein, The transmission device of the SSB also includes: The sending module is used to send the second uplink random access message; Wherein, the path loss reference of the second uplink random access message satisfies one of the following: The path loss reference for the second uplink random access message is the first SSB; The path loss reference for the second uplink random access message is the second SSB; The path loss reference of the second uplink random access message is reported via message 3 of the random access procedure; The path loss reference for the Qth retransmission or repeated transmission of the second uplink random access message is switched from the first SSB to the second SSB, or from the second SSB to the first SSB; where Q is a positive integer.

38. The apparatus according to any one of claims 30 to 37, wherein, The receiving module is also configured to receive a first downlink random access message; Wherein, the quasi-co-address QCL reference of the first downlink random access message satisfies one of the following: The QCL reference of the first downlink random access message is the first SSB; The QCL reference of the first downlink random access message is the second SSB; The first downlink random access message uses the first SSB as its QCL reference on the first QCL parameter, and the first downlink random access message uses the second SSB as its QCL reference on the second QCL parameter. The first downlink random access message does not have the QCL reference in the spatial relationship parameter; The QCL reference of the first downlink random access message is reported via message 3 of the random access procedure; The QCL reference for the Sth retransmission or repeated transmission of the first downlink random access message is switched from the first SSB to the second SSB, or from the second SSB to the first SSB; where S is a positive integer.

39. A transmission device for an SSB, comprising: A transmitting module is used to transmit at least one of a first synchronization signal block (SSB) and a second SSB. Wherein, the first SSB and the second SSB satisfy at least one of the following: There is an association between the first SSB and the second SSB; The first SSB and the second SSB correspond to different resources; The first SSB and the second SSB have different configuration information.

40. The apparatus of claim 39, wherein, The transmission device of the SSB also includes: The receiving module is used to receive the first uplink random access message from the terminal; Wherein, the first uplink random access message satisfies one of the following: The SSB on which the Pth retransmission or repeated transmission of the first uplink random access message is based is switched from the first SSB to the second SSB, or from the second SSB to the first SSB. The SSB on which the Pth retransmission or repeated transmission of the first uplink random access message is based switches from one first SSB to another first SSB, or from one second SSB to another second SSB; Where P is a positive integer.

41. The apparatus of claim 39 or 40, wherein, The transmission device of the SSB also includes: The receiving module is used to receive the second uplink random access message from the terminal; Wherein, the path loss reference of the second uplink random access message satisfies one of the following: The path loss reference for the second uplink random access message is the first SSB; The path loss reference for the second uplink random access message is the second SSB; The path loss reference of the second uplink random access message is reported via message 3 of the random access procedure; The path loss reference for the Qth retransmission or repeated transmission of the second uplink random access message is switched from the first SSB to the second SSB, or from the second SSB to the first SSB; where Q is a positive integer.

42. The apparatus of any one of claims 39-41, wherein, The sending module is also used to send a first downlink random access message to the terminal; Wherein, the quasi-co-address QCL reference of the first downlink random access message satisfies one of the following: The QCL reference of the first downlink random access message is the first SSB; The QCL reference of the first downlink random access message is the second SSB; The first downlink random access message uses the first SSB as its QCL reference on the first QCL parameter, and the first downlink random access message uses the second SSB as its QCL reference on the second QCL parameter. The first downlink random access message does not have the QCL reference in the spatial relationship parameter; The QCL reference of the first downlink random access message is reported via message 3 of the random access procedure; The QCL reference for the Sth retransmission or repeated transmission of the first downlink random access message is switched from the first SSB to the second SSB, or from the second SSB to the first SSB; where S is a positive integer.

43. A terminal comprising 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 SSB transmission method as claimed in any one of claims 1 to 17.

44. A network-side device, comprising 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 SSB transmission method as claimed in any one of claims 18 to 30.

45. A readable storage medium storing a program or instructions that, when executed by a processor, implement the steps of the SSB transmission method as claimed in any one of claims 1 to 17, or implement the steps of the SSB transmission method as claimed in any one of claims 18 to 30.

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