Synchronization information transmission methods, apparatus and device, and non-transitory readable storage medium

Abstract

The present disclosure provides synchronization information transmission methods, apparatus and device, and a non-transitory readable storage medium. A synchronization information transmission method comprises: sending synchronization information to a terminal, the synchronization information comprising a first synchronization signal block (SSB) set and a first physical broadcast channel (PBCH) set, or the synchronization information comprising a second SSB set, and at least one SSB in the second SSB set being repeatedly transmitted, or the synchronization information comprising a third SSB set having a transmission period greater than 20 ms, and the third SSB set being used for initial access of the terminal.

Description

Synchronous information transmission methods, devices, equipment and non-transiently readable storage media

[0001] This disclosure claims priority to Chinese Patent Application No. 202510124667.0, filed on January 26, 2025, entitled "Synchronous Information Transmission Method, Apparatus, Device and Non-Instantaneously Readable Storage Medium", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of communication technology, and in particular to a method, apparatus, device and non-instantaneous readable storage medium for synchronous information transmission. Background Technology

[0003] In 5G New Radio Access (NR) systems, for terminals in Radio Resource Control (RRC) idle mode, during initial access, the terminal assumes that the period of the synchronization signal and PBCH block (SSB) burst set sent by the base station is 20ms. To meet the initial access requirements of RRC idle-mode terminals, the base station must continuously send SSB burst sets on the primary cell (PCell) at a period of no less than 20ms. Thus, even if there are no users in the area covered by the base station or the traffic load is low, the base station still needs to send an SSB burst set (for initial terminal access) at least once every 20ms. This prevents the base station from entering deep sleep mode, affecting its energy-saving performance.

[0004] While base stations can indeed achieve better base station energy saving by sending SSB burst sets for initial terminal access at higher intervals (e.g., 80ms or 160ms), terminals generally need to receive multiple SSB burst sets to complete Physical Broadcast Channel (PBCH) decoding (e.g., the terminal needs to receive 3 SSB burst sets within 60ms to complete PBCH decoding and obtain system information related to initial access). Therefore, this leads to higher initial terminal access latency, affecting user experience.

[0005] As mentioned above, the synchronous information transmission schemes in related technologies have problems such as poor energy saving effect on the network side or high initial access latency of the terminal. Summary of the Invention

[0006] The purpose of this disclosure is to provide a method, apparatus, device, and non-instantaneous readable storage medium for synchronous information transmission, so as to solve the problems of poor energy saving effect on the network side or high initial access latency of the terminal in the synchronous information transmission scheme in the related art.

[0007] To address the aforementioned technical problems, this disclosure provides a method for synchronous information transmission, applied to a network-side device, comprising:

[0008] Send synchronization information to the terminal; wherein, the synchronization information includes a first set of synchronization signal blocks (SSBs) and a first set of physical broadcast channels (PBCHs);

[0009] Alternatively, the synchronization information includes a second SSB set, in which at least one SSB is repeatedly transmitted;

[0010] Alternatively, the synchronization information may include a third SSB set with a transmission period greater than 20ms, the third SSB set being used for the initial access of the terminal.

[0011] This disclosure also provides a method for synchronous information transmission, applied to a terminal, including:

[0012] The system receives synchronization information sent by a network-side device; wherein the synchronization information includes a first set of synchronization signal blocks (SSBs) and a first set of physical broadcast channels (PBCHs); or, the synchronization information includes a second set of SSBs, wherein at least one SSB in the second set of SSBs is repeatedly transmitted; or, the synchronization information includes a third set of SSBs with a transmission period greater than 20ms, wherein the third set of SSBs is used for the initial access of the terminal.

[0013] Based on the synchronization information, a broadcast message is obtained.

[0014] This disclosure also provides a synchronization information transmission device, which is a network-side device, including a memory, a transceiver, and a processor.

[0015] A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations:

[0016] The transceiver sends synchronization information to the terminal; wherein the synchronization information includes a first synchronization signal block (SSB) set and a first physical broadcast channel (PBCH) set.

[0017] Alternatively, the synchronization information includes a second SSB set, in which at least one SSB is repeatedly transmitted;

[0018] Alternatively, the synchronization information may include a third SSB set with a transmission period greater than 20ms, the third SSB set being used for the initial access of the terminal.

[0019] This disclosure also provides a synchronization information transmission device, which is a terminal and includes a memory, a transceiver, and a processor.

[0020] A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations:

[0021] The transceiver receives synchronization information sent by network-side devices; wherein the synchronization information includes a first set of synchronization signal blocks (SSBs) and a first set of physical broadcast channels (PBCHs); or, the synchronization information includes a second set of SSBs, wherein at least one SSB in the second set of SSBs is repeatedly transmitted; or, the synchronization information includes a third set of SSBs with a transmission period greater than 20ms, wherein the third set of SSBs is used for the initial access of the terminal.

[0022] Based on the synchronization information, a broadcast message is obtained.

[0023] This disclosure also provides a synchronization information transmission device, applied to a network-side device, including:

[0024] The first transmitting unit is used to transmit synchronization information to the terminal; wherein, the synchronization information includes a first synchronization signal block (SSB) set and a first physical broadcast channel (PBCH) set;

[0025] Alternatively, the synchronization information includes a second SSB set, in which at least one SSB is repeatedly transmitted;

[0026] Alternatively, the synchronization information may include a third SSB set with a transmission period greater than 20ms, the third SSB set being used for the initial access of the terminal.

[0027] This disclosure also provides a synchronous information transmission device, applied to a terminal, comprising:

[0028] The second receiving unit is used to receive synchronization information sent by the network-side device; wherein the synchronization information includes a first synchronization signal block (SSB) set and a first physical broadcast channel (PBCH) set; or, the synchronization information includes a second SSB set, wherein at least one SSB in the second SSB set is repeatedly transmitted; or, the synchronization information includes a third SSB set with a transmission period greater than 20ms, wherein the third SSB set is used for the initial access of the terminal.

[0029] The first processing unit is used to obtain the broadcast message based on the synchronization information.

[0030] This disclosure also provides a non-transient readable storage medium storing a program for causing a processor to execute the above-described network-side device-side or terminal-side synchronization information transmission method.

[0031] The beneficial effects of the above-disclosed technical solution are as follows:

[0032] In the above scheme, the synchronization information transmission method sends synchronization information to the terminal; wherein, the synchronization information includes a first synchronization signal block (SSB) set and a first physical broadcast channel (PBCH) set; or, the synchronization information includes a second SSB set, at least one SSB in the second SSB set being repeatedly transmitted; or, the synchronization information includes a third SSB set with a transmission period greater than 20ms, the third SSB set being used for the initial access of the terminal; it can support the combination of the first SSB set and the first PBCH set, or the repeated transmission of SSBs in the second SSB set, or the transmission of a third SSB set with a long period, so that the terminal can obtain relevant system information and complete synchronization. It can avoid the high power consumption caused by periodically transmitting SSBs with a small period (e.g., increasing the SSB period to reduce network-side power consumption), optimize the network-side energy saving effect, and can also avoid the problem of high terminal access latency caused by increasing the SSB period to a certain extent. It effectively solves the problems of poor network-side energy saving effect or high initial terminal access latency in the synchronization information transmission schemes of related technologies. Attached Figure Description

[0033] Figure 1 is a schematic diagram of the wireless communication system architecture according to an embodiment of this disclosure;

[0034] Figure 2 is a schematic diagram of SSB transmission for initial access in a 5G NR system according to an embodiment of this disclosure;

[0035] Figure 3 is a schematic diagram of SSB transmission for initial access in a 5G NR system according to an embodiment of this disclosure;

[0036] Figure 4 is a schematic flowchart of the synchronous information transmission method according to an embodiment of this disclosure;

[0037] Figure 5 is a schematic flowchart of the synchronous information transmission method according to an embodiment of this disclosure;

[0038] Figure 6 is a schematic diagram illustrating a specific implementation of the synchronous information transmission method according to an embodiment of this disclosure;

[0039] Figure 7 is a schematic diagram of PBCH occupying OFDM symbols according to an embodiment of this disclosure;

[0040] Figure 8 is a schematic diagram of a specific implementation of the synchronous information transmission method according to an embodiment of this disclosure;

[0041] Figure 9 is a schematic diagram of a specific implementation of the synchronous information transmission method according to an embodiment of this disclosure;

[0042] Figure 10 is a schematic diagram of a specific implementation of the synchronous information transmission method according to an embodiment of this disclosure;

[0043] Figure 11 is a schematic diagram of a specific implementation of the synchronous information transmission method according to an embodiment of this disclosure;

[0044] Figure 12 is a schematic diagram of a specific implementation of the synchronous information transmission method according to an embodiment of this disclosure;

[0045] Figure 13 is a schematic diagram of the structure of a synchronous information transmission device according to an embodiment of this disclosure;

[0046] Figure 14 is a schematic diagram of the structure of the synchronous information transmission device according to an embodiment of this disclosure;

[0047] Figure 15 is a schematic diagram of the structure of the synchronous information transmission device according to an embodiment of this disclosure;

[0048] Figure 16 is a schematic diagram of the structure of the synchronous information transmission device according to an embodiment of this disclosure. Detailed Implementation

[0049] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0050] In this disclosure, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0051] In this disclosure, the term "multiple" refers to two or more, and other quantifiers are similar.

[0052] It should be noted that the technical solutions provided in this disclosure are applicable to a variety of systems. For example, applicable systems may include Global System for Mobile Communication (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS), Long Term Evolution (LTE), LTE Frequency Division Duplex (FDD), LTE Time Division Duplex (TDD), Long Term Evolution Advanced (LTE-A), Universal Mobile Telecommunications System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX), 5G New Radio (NR) and its evolutionary communication systems, and 6th Generation Mobile Communication Technology (6G), etc. All of these systems include terminal equipment (also simply referred to as terminals) and network equipment. The system may also include a core network component, such as an evolved packet system (EPS) or a 5G system (5GS).

[0053] Figure 1 shows a block diagram of a wireless communication system applicable to embodiments of the present disclosure. The wireless communication system includes terminal equipment and network equipment.

[0054] The terminal devices involved in the embodiments of this disclosure can be devices that provide voice and / or data connectivity to users, handheld devices with wireless connectivity, or other processing devices connected to a wireless modem. The names of the terminal devices may differ in different systems; for example, in 5G or 6G systems, the terminal device may be called User Equipment (UE). Wireless terminal devices can be USB storage devices, other personal computer memory devices, and dongles. They can also communicate with one or more core networks (CNs) via a Radio Access Network (RAN). Wireless terminal devices can be mobile terminal devices, such as mobile phones (or "cellular" phones) and computers with mobile terminal devices. For example, they can be portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile devices that exchange voice and / or data with the radio access network. Examples of such devices include Personal Communication Service (PCS) telephones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), personal computers, tablets, and Machine-type Communication (MTC) terminal devices. Wireless terminal devices can also be referred to as systems, subscriber units, subscriber stations, mobile stations, mobile devices, remote stations, access points, remote terminals, access terminals, user terminals, user agents, user devices, and wireless access devices and routers / modems that meet the limitations of this definition, but are not limited to these in the embodiments of this disclosure.

[0055] The network device involved in this disclosure can be a base station, which may include multiple cells providing services to terminals. Depending on the specific application, the base station may also be called an access point, or a device in the access network that communicates with the wireless terminal device through one or more sectors on the air interface, or other names. The network device can be used to exchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, where the rest of the access network may include an Internet Protocol (IP) communication network. The network device can also coordinate the attribute management of the air interface. For example, the network equipment involved in this disclosure can be a base transceiver station (BTS) in a Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), a NodeB in a Wide-band Code Division Multiple Access (WCDMA) system, an evolved Node B (eNB or e-NodeB) in a long term evolution (LTE) system, a 5G base station (gNB) in a next generation system, a 6G base station in a 6G network architecture, a Home evolved Node B (HeNB), a relay node, a femto, a pico, network testing equipment, etc., and is not limited in this disclosure. In some network architectures, network devices may include centralized unit (CU) nodes and distributed unit (DU) nodes, which may also be geographically separated.

[0056] Network devices and terminal devices can each use one or more antennas for Multiple Input Multiple Output (MIMO) transmission. MIMO transmission can be Single User MIMO (SU-MIMO) or Multiple User MIMO (MU-MIMO). Depending on the shape and number of antenna combinations, MIMO transmission can be two-dimensional MIMO (2D-MIMO), three-dimensional MIMO (3D-MIMO), full-dimensional MIMO (FD-MIMO), or massive-scale MIMO. It can also be diversity transmission, pre-coded transmission, or beamforming transmission, etc.

[0057] The following is a description of the solutions provided in the embodiments of this disclosure.

[0058] As shown in Figures 2 and 3, in the current scheme, base station 1 can send an SSB burst set for initial access at a period of 20ms. Terminal 1 receives the SSB burst set and completes the initial access.

[0059] Based on the above, this disclosure provides a method, apparatus, device, and non-transiently readable storage medium for synchronous information transmission, to solve the problems of poor network-side energy saving or high initial terminal access latency in related technologies. The method, apparatus, device, and non-transiently readable storage medium are based on the same concept. Since the principles by which the method, apparatus, device, and non-transiently readable storage medium solve the problem are similar, their implementations can be mutually referenced, and repeated details will not be elaborated further.

[0060] The synchronization information transmission method (which can also be a synchronization information sending method) provided in this embodiment is applied to a network-side device, as shown in Figure 4, and includes:

[0061] Step 41: Send synchronization information to the terminal; wherein the synchronization information includes a first set of synchronization signal blocks (SSBs) and a first set of physical broadcast channels (PBCHs); or, the synchronization information includes a second set of SSBs, wherein at least one SSB in the second set of SSBs is repeatedly sent (e.g., an SSB with the same index is sent at least twice, and different SSBs correspond to different indices); or, the synchronization information includes a third set of SSBs with a sending period greater than 20ms, wherein the third set of SSBs is used for the initial access of the terminal.

[0062] The synchronization information transmission method provided in this embodiment sends synchronization information to the terminal; wherein the synchronization information includes a first synchronization signal block (SSB) set and a first physical broadcast channel (PBCH) set; or, the synchronization information includes a second SSB set, at least one SSB in the second SSB set being repeatedly transmitted; or, the synchronization information includes a third SSB set with a transmission period greater than 20ms, the third SSB set being used for the initial access of the terminal; it can support the combination of the first SSB set and the first PBCH set, or the repeated transmission of SSBs in the second SSB set, or the transmission of a third SSB set with a long period, so that the terminal can obtain relevant system information and complete synchronization. It can avoid the high power consumption caused by periodically transmitting SSBs with a small period (e.g., increasing the SSB period to reduce network-side power consumption), optimize the network-side energy saving effect, and can also avoid the problem of high terminal access latency caused by increasing the SSB period to a certain extent. It effectively solves the problems of poor network-side energy saving effect or high initial terminal access latency in the synchronization information transmission schemes of related technologies.

[0063] In this configuration, at least one of the first SSB set, the first PBCH set, the second SSB set, and the third SSB set is triggered by a first trigger signal sent by the terminal or by the network-side device; and / or, the synchronization information further includes at least one of a fourth SSB set and a second PBCH set triggered by a second trigger signal sent by the terminal or by the network-side device (i.e., the synchronization information further includes at least one of a fourth SSB set and a second PBCH set triggered by a second trigger signal sent by the terminal; or, the synchronization information further includes at least one of a fourth SSB set and a second PBCH set triggered by the network-side device). This allows for the implementation of multiple on-demand triggering schemes.

[0064] In this embodiment of the disclosure, at least one of the first SSB set, the first PBCH set, the second SSB set, the third SSB set, the fourth SSB set, and the second PBCH set is a set for on-demand transmission. This clearly defines the set for on-demand transmission. On-demand transmission refers to transmission based on the needs of a network element (such as a terminal) or transmission triggered by a network element, but is not limited to this.

[0065] In this embodiment, the first SSB set is periodically transmitted over a first period, and the first period is longer than the second period; or, the second SSB set is periodically transmitted over a third period, and the third period is longer than the fourth period; wherein the second period is 20ms, and / or the first period is 40ms, 80ms, 160ms, 320ms, 640ms, or 1280ms; or, the fourth period is 20ms, and / or the third period is 40ms, 80ms, 160ms, 320ms, 640ms, or 1280ms. This clarifies the transmission of long-period SSB sets and the period values ​​in this scheme, thereby better achieving network-side energy saving.

[0066] In this embodiment of the disclosure, the first SSB set includes M1 SSBs, each SSB corresponding to a different SSB index number; M1 is 4, 8, or 64; or, the second SSB set includes M2 × M3 SSBs, where M2 is 4, 8, or 64, and M3 is an integer greater than 1. This clarifies the specific implementation of the SSB set.

[0067] The second SSB set is transmitted within M3 consecutive first time units; where each first time unit is a half-frame, a subframe, or Q1 orthogonal frequency division multiplexing (OFDM) symbols, and Q1 is a positive integer. This allows for the transmission of SSBs within a concentrated time frame, thus better achieving network-side energy saving.

[0068] In this embodiment of the disclosure, the first PBCH set is repeatedly transmitted within the transmission period of the first SSB set. This can further shorten the transmission time of synchronization information and better achieve network-side energy saving.

[0069] Specifically, the set of SSB index numbers associated with each PBCH in the first PBCH set is the same as the set of SSB index numbers in the first SSB set. This avoids the additional signaling overhead introduced by needing to separately indicate the set of SSB index numbers associated with each PBCH.

[0070] In this embodiment, the first SSB set is transmitted within a second time unit, and the first PBCH set is transmitted after the resources occupied by the first SSB set are used; wherein, the second time unit is a half-frame, a subframe, or Q2 orthogonal frequency division multiplexing (OFDM) symbols, and Q2 is a positive integer. This clarifies the transmission of the first SSB set and the first PBCH set.

[0071] The first PBCH set is transmitted after the resources occupied by the first SSB set, including: the first PBCH set is transmitted within a third time unit or within at least two consecutive third time units after the second time unit; wherein the third time unit is a half-frame, a subframe, or Q3 orthogonal frequency division multiplexing (OFDM) symbols, and Q3 is a positive integer. This supports the specific implementation of the transmission of the first PBCH set.

[0072] In this embodiment of the disclosure, each PBCH in the first PBCH set occupies 3 OFDM symbols, and the second OFDM symbol occupied by each PBCH carries the secondary synchronization signal SSS that occupies part of the resource element RE; or, each PBCH in the first PBCH set occupies 2 consecutive OFDM symbols. This allows for multiple ways to implement the PBCHs in the first PBCH set.

[0073] In this configuration, at least one PBCH in the first PBCH set is demodulated (or demodulated by DMRS and SSS) using a demodulation reference signal, or demodulated solely by DMRS. This clarifies the demodulation method of the PBCHs in the first PBCH set. The statement "at least one PBCH in the first PBCH set is demodulated (or demodulated solely by DMRS) using a demodulation reference signal, DMRS and SSS" can also be expressed as: at least one PBCH in the first PBCH set can be demodulated using a demodulation reference signal, DMRS and SSS, or can be demodulated solely by DMRS; or, it can also be expressed as: at least one PBCH in the first PBCH set is demodulated using a demodulation reference signal, DMRS and SSS, or demodulated solely by DMRS; however, this is not a limitation.

[0074] In this embodiment of the disclosure, the SSBs in the second SSB set are repeatedly transmitted through a first granularity, which includes at least a portion of the SSBs in the second SSB set. This can support multiple ways to implement the repeated transmission of SSBs in the second SSB set; for example, "the first granularity includes at least a portion of the SSBs in the second SSB set" can include: (1) the first granularity is all the SSBs in the second SSB set, for example, the SSBs in the second SSB set are repeated in the manner of beam scanning as a whole, that is: first (whole) beam scanning is performed, then the second beam scanning is performed, and finally the third beam scanning is performed; or, (2) the first granularity is a portion of the SSBs in the second SSB set, for example, the SSBs in the second SSB set are repeated in the manner of SSB repetition, for example: first the beam with SSB index number 0 is repeatedly transmitted three times, then the beam with SSB index number 1 is repeatedly transmitted three times, and so on; but it is not limited to this.

[0075] Wherein, the first parameter of the SSB in the fourth SSB set is the same as the first parameter of the SSB in the first SSB set or the second SSB set; the first parameter includes at least one of: center frequency, subcarrier spacing, physical layer cell identification number, and transmit power; and / or, the second parameter of the PBCH in the second PBCH set is the same as the second parameter of the PBCH included in the SSB in the first SSB set or the second SSB set; the second parameter includes at least one of: center frequency, subcarrier spacing, and transmit power. This avoids the additional signaling overhead introduced by needing to additionally indicate the parameters of the SSB in the fourth SSB set and / or the parameters of the PBCH in the second PBCH set.

[0076] In this embodiment of the disclosure, the fourth SSB set is a subset of the first SSB set or the second SSB set; and / or, the second PBCH set is a subset of the PBCHs contained in the SSBs of the first SSB set or the second SSB set; and / or, the fourth SSB set includes SSBs associated with the beam direction used by the second trigger signal; and / or, the second PBCH set includes PBCHs associated with the beam direction used by the second trigger signal. This can further reduce the power consumption on the network side. "Associated with the beam direction used by the second trigger signal" can include: a strong correlation with the beam direction of the second trigger signal, such as beam direction having uplink / downlink reciprocity, etc., which is not limited here.

[0077] The transmission of a fourth SSB set occupies a fourth time unit, and the fourth SSB set is transmitted at least twice within consecutive fourth time units; and / or, the transmission of a second PBCH set occupies a fifth time unit, and the second PBCH set is transmitted at least twice within consecutive fifth time units; wherein the fourth time unit is a half-frame, a subframe, or Q4 Orthogonal Frequency Division Multiplexing (OFDM) symbols, where Q4 is a positive integer; and / or, the fifth time unit is a half-frame, a subframe, or Q5 OFDM symbols, where Q5 is a positive integer. This allows for the repeated transmission of the fourth SSB set and / or the second PBCH set within a concentrated time period, thus better achieving network-side energy saving.

[0078] In this embodiment of the disclosure, the starting transmission time of the first fourth SSB set is the start time of the K1th fourth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first second PBCH set is the start time of the K2th fifth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first fourth SSB set is within the interval from the K3th fourth time unit to the K3+L1-1th fourth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first second PBCH set is within the interval from the K4th fifth time unit to the K4+L2-1th fifth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first fourth SSB set is the first time unit after the network-side device processing time requirement is met. Within the sixth time unit (which can be understood as the first sixth time unit after the terminal sends the second trigger signal and the network-side device processing time requirement is met), the network-side device processing time requirement is predefined; and / or, the starting transmission time of the first second PBCH set is within the first seventh time unit after the network-side device processing time requirement is met (which can be understood as the starting transmission time being within the first seventh time unit after the terminal sends the second trigger signal and the network-side device processing time requirement is met), the network-side device processing time requirement is predefined; wherein, the sixth time unit is a half-frame, a subframe, or Q6 orthogonal frequency division multiplexing (OFDM) symbols, where Q6 is a positive integer; and / or, the seventh time unit is a half-frame, a subframe, or Q7 orthogonal frequency division multiplexing (OFDM) symbols, where Q7 is a positive integer. This supports specifying the exact starting transmission time of the fourth SSB set and / or the second PBCH set.

[0079] The transmission of a first SSB set occupies an eighth time unit, and the first SSB set is transmitted at least twice within consecutive eighth time units; and / or, the transmission of a first PBCH set occupies a ninth time unit, and the first PBCH set is transmitted at least twice within consecutive ninth time units; and / or, the transmission of a second SSB set occupies a tenth time unit, and the second SSB set is transmitted at least twice within consecutive tenth time units; wherein the eighth time unit is a half-frame, a subframe, or Q8 orthogonal frequency division multiplexing (OFDM) symbols, where Q8 is a positive integer; and / or, the ninth time unit is a half-frame, a subframe, or Q9 orthogonal frequency division multiplexing (OFDM) symbols, where Q9 is a positive integer; and / or, the tenth time unit is a half-frame, a subframe, or Q10 orthogonal frequency division multiplexing (OFDM) symbols, where Q10 is a positive integer. This allows for the repeated transmission of the first SSB set and / or the first PBCH set and / or the second SSB set within a concentrated timeframe, thus better achieving network-side energy saving.

[0080] In this embodiment of the disclosure, the starting transmission time of the first first SSB set is the start time of the K5th eighth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first first PBCH set is the start time of the K6th ninth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first second SSB set is the start time of the K7th tenth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first first SSB set is the K8th eighth time unit after the terminal sends the first trigger signal. The first PBCH set begins transmission within the interval from the K8+L3-1th eighth time unit; and / or, the first PBCH set begins transmission within the interval from the K9th ninth time unit to the K9+L4-1th ninth time unit after the terminal sends the first trigger signal; and / or, the first SSB set begins transmission within the interval from the K10th tenth time unit to the K10+L5-1th tenth time unit after the terminal sends the first trigger signal; and / or, the first SSB set begins transmission within the interval from the K10th tenth time unit to the K10+L5-1th tenth time unit after the network-side device processing time requirement is met. Within the first eleventh time unit (which can be understood as the starting transmission time being within the first eleventh time unit after the terminal sends the second trigger signal and the network-side device processing time requirement is met), the network-side device processing time requirement is predefined; and / or, the starting transmission time of the first PBCH set is within the first twelfth time unit after the network-side device processing time requirement is met (which can be understood as the starting transmission time being within the first twelfth time unit after the terminal sends the second trigger signal and the network-side device processing time requirement is met), the network-side device processing time requirement is predefined; and / or, the first 11th time unit is within the first twelfth time unit after the terminal sends the second trigger signal and the network-side device processing time requirement is met). The initial transmission time of a second SSB set is within the first thirteenth time unit after the network-side device processing time requirement is met, and the network-side device processing time requirement is predefined; wherein, the eleventh time unit is a half-frame, a subframe, or Q11 Orthogonal Frequency Division Multiplexing (OFDM) symbols, where Q11 is a positive integer; and / or, the twelfth time unit is a half-frame, a subframe, or Q12 OFDM symbols, where Q12 is a positive integer; and / or, the thirteenth time unit is a half-frame, a subframe, or Q13 OFDM symbols, where Q13 is a positive integer. This allows for the specific determination of the initial transmission time of the first SSB set and / or the first PBCH set and / or the second SSB set.

[0081] Furthermore, the synchronization information transmission method further includes: receiving a trigger signal sent by the terminal; the trigger signal includes a first trigger signal and / or a second trigger signal; determining, based on the first trigger signal, whether to send at least one of the first SSB set, the first PBCH set, the second SSB set, and the third SSB set; and / or, based on the second trigger signal, determining whether to send at least one of the fourth SSB set and the second PBCH set; wherein, sending synchronization information to the terminal includes: if sending is determined based on the first trigger signal, sending at least one of the first SSB set, the first PBCH set, the second SSB set, and the third SSB set to the terminal; and / or, if sending is determined based on the second trigger signal, sending at least one of the fourth SSB set and the second PBCH set to the terminal. This allows the network-side device to decide whether to send on-demand signals (i.e., at least one of the aforementioned first SSB set, first PBCH set, second SSB set, third SSB set, fourth SSB set, and second PBCH set).

[0082] This disclosure also provides a synchronization information transmission method (which can also be a synchronization information reception method), applied to a terminal, as shown in Figure 5, including:

[0083] Step 51: Receive synchronization information sent by the network-side device; wherein the synchronization information includes a first set of synchronization signal blocks (SSBs) and a first set of physical broadcast channels (PBCHs); or, the synchronization information includes a second set of SSBs, at least one SSB in the second set of SSBs is repeatedly transmitted; or, the synchronization information includes a third set of SSBs with a transmission period greater than 20ms, the third set of SSBs being used for the initial access of the terminal.

[0084] Step 52: Obtain the broadcast message based on the synchronization information (not limited to obtaining the broadcast message, other synchronization operations can also be performed to complete the downlink synchronization).

[0085] The synchronization information transmission method provided in this embodiment receives synchronization information sent by a network-side device. The synchronization information includes a first set of Synchronization Signal Blocks (SSBs) and a first set of Physical Broadcast Channels (PBCHs). Alternatively, the synchronization information includes a second set of SSBs, where at least one SSB in the second set is repeatedly transmitted. Or, the synchronization information includes a third set of SSBs with a transmission period greater than 20ms, used for initial terminal access. A broadcast message is obtained based on the synchronization information. This method supports combining the first SSB set with the first PBCH set, repeatedly transmitting SSBs from the second SSB set, or transmitting a third SSB set with a long period, so that the terminal obtains relevant system information and completes synchronization. It avoids the high power consumption caused by periodically transmitting SSBs with a small period (e.g., increasing the SSB period to reduce network-side power consumption), optimizes network-side energy saving, and to some extent avoids the problem of high terminal access latency caused by increased SSB periods. This effectively solves the problems of poor network-side energy saving or high initial terminal access latency in related synchronization information transmission schemes.

[0086] Wherein, at least one of the first SSB set, the first PBCH set, the second SSB set, and the third SSB set is triggered by a first trigger signal sent by the terminal or by the network-side device; and / or, the synchronization information further includes at least one of the fourth SSB set and the second PBCH set triggered by a second trigger signal sent by the terminal or by the network-side device. This supports multiple on-demand triggering schemes.

[0087] In this embodiment of the disclosure, at least one of the first SSB set, the first PBCH set, the second SSB set, the third SSB set, the fourth SSB set, and the second PBCH set is an on-demand transmission set. This clearly defines the on-demand transmission set.

[0088] In this embodiment, the first SSB set is periodically transmitted over a first period, and the first period is longer than the second period; or, the second SSB set is periodically transmitted over a third period, and the third period is longer than the fourth period; wherein the second period is 20ms, and / or the first period is 40ms, 80ms, 160ms, 320ms, 640ms, or 1280ms; or, the fourth period is 20ms, and / or the third period is 40ms, 80ms, 160ms, 320ms, 640ms, or 1280ms. This clarifies the transmission of long-period SSB sets and the period values ​​in this scheme, thereby better achieving network-side energy saving.

[0089] In this embodiment of the disclosure, the first SSB set includes M1 SSBs, each SSB corresponding to a different SSB index number; M1 is 4, 8, or 64; or, the second SSB set includes M2 × M3 SSBs, where M2 is 4, 8, or 64, and M3 is an integer greater than 1. This clarifies the specific implementation of the SSB set.

[0090] The second SSB set is transmitted within M3 consecutive first time units; where each first time unit is a half-frame, a subframe, or Q1 orthogonal frequency division multiplexing (OFDM) symbols, and Q1 is a positive integer. This allows for the transmission of SSBs within a concentrated time frame, thus better achieving network-side energy saving.

[0091] In this embodiment, the first PBCH set is repeatedly transmitted within the transmission period of the first SSB set. This further shortens the transmission time of synchronization information and better achieves network-side energy saving.

[0092] Specifically, the set of SSB index numbers associated with each PBCH in the first PBCH set is the same as the set of SSB index numbers in the first SSB set. This avoids the additional signaling overhead introduced by needing to separately indicate the set of SSB index numbers associated with each PBCH.

[0093] In this embodiment, the first SSB set is transmitted within a second time unit, and the first PBCH set is transmitted after the resources occupied by the first SSB set are used; wherein, the second time unit is a half-frame, a subframe, or Q2 orthogonal frequency division multiplexing (OFDM) symbols, and Q2 is a positive integer. This clarifies the transmission of the first SSB set and the first PBCH set.

[0094] The first PBCH set is transmitted after the resources occupied by the first SSB set, including: the first PBCH set is transmitted within a third time unit or within at least two consecutive third time units after the second time unit; wherein the third time unit is a half-frame, a subframe, or Q3 orthogonal frequency division multiplexing (OFDM) symbols, and Q3 is a positive integer. This supports the specific implementation of the transmission of the first PBCH set.

[0095] In this embodiment of the disclosure, each PBCH in the first PBCH set occupies 3 OFDM symbols, and the second OFDM symbol occupied by each PBCH carries the secondary synchronization signal SSS that occupies part of the resource element RE; or, each PBCH in the first PBCH set occupies 2 consecutive OFDM symbols. This allows for multiple ways to implement the PBCHs in the first PBCH set.

[0096] In this configuration, at least one PBCH in the first PBCH set is demodulated using a demodulation reference signal DMRS and a SSS, or demodulated using only DMRS. This clarifies the demodulation method of the PBCHs in the first PBCH set.

[0097] In this embodiment of the disclosure, the SSBs in the second SSB set are repeatedly transmitted using a first granularity, which includes at least a portion of the SSBs in the second SSB set. This allows for multiple methods to achieve repeated transmission of SSBs in the second SSB set.

[0098] Wherein, the first parameter of the SSB in the fourth SSB set is the same as the first parameter of the SSB in the first SSB set or the second SSB set; the first parameter includes at least one of: center frequency, subcarrier spacing, physical layer cell identification number, and transmit power; and / or, the second parameter of the PBCH in the second PBCH set is the same as the second parameter of the PBCH included in the SSB in the first SSB set or the second SSB set; the second parameter includes at least one of: center frequency, subcarrier spacing, and transmit power. This avoids the additional signaling overhead introduced by needing to additionally indicate the parameters of the SSB in the fourth SSB set and / or the parameters of the PBCH in the second PBCH set.

[0099] In this embodiment of the disclosure, the fourth SSB set is a subset of the first SSB set or the second SSB set; and / or, the second PBCH set is a subset of the PBCHs contained in the SSBs of the first SSB set or the second SSB set; and / or, the fourth SSB set includes SSBs associated with the beam direction used by the second trigger signal; and / or, the second PBCH set includes PBCHs associated with the beam direction used by the second trigger signal. This can further reduce the power consumption on the network side.

[0100] The transmission of a fourth SSB set occupies a fourth time unit, and the fourth SSB set is transmitted at least twice within consecutive fourth time units; and / or, the transmission of a second PBCH set occupies a fifth time unit, and the second PBCH set is transmitted at least twice within consecutive fifth time units; wherein the fourth time unit is a half-frame, a subframe, or Q4 Orthogonal Frequency Division Multiplexing (OFDM) symbols, where Q4 is a positive integer; and / or, the fifth time unit is a half-frame, a subframe, or Q5 OFDM symbols, where Q5 is a positive integer. This allows for the repeated transmission of the fourth SSB set and / or the second PBCH set within a concentrated time period, thus better achieving network-side energy saving.

[0101] In this embodiment of the disclosure, the starting transmission time of the first fourth SSB set is the start time of the K1th fourth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first second PBCH set is the start time of the K2th fifth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first fourth SSB set is within the interval from the K3th fourth time unit to the K3+L1-1th fourth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first second PBCH set is within the interval from the K4th fifth time unit to the K4+L2-1th fifth time unit after the terminal sends the second trigger signal. Within the time unit interval; and / or, the start transmission time of the first fourth SSB set is within the first sixth time unit after meeting the network-side device processing time requirement, which is predefined; and / or, the start transmission time of the first second PBCH set is within the first seventh time unit after meeting the network-side device processing time requirement, which is predefined; wherein, the sixth time unit is a half-frame, a subframe, or Q6 Orthogonal Frequency Division Multiplexing (OFDM) symbols, where Q6 is a positive integer; and / or, the seventh time unit is a half-frame, a subframe, or Q7 Orthogonal Frequency Division Multiplexing (OFDM) symbols, where Q7 is a positive integer. This supports specifying the exact start transmission time of the fourth SSB set and / or the second PBCH set.

[0102] The process of receiving synchronization information from the network-side device includes: monitoring the interval from the K3rd fourth time unit to the K3+L1-1th fourth time unit after the second trigger signal is sent, and receiving the fourth SSB set; and / or, monitoring the interval from the K4th fifth time unit to the K4+L2-1th fifth time unit after the second trigger signal is sent, and receiving the second PBCH set. This ensures accurate reception of relevant synchronization information.

[0103] In this embodiment of the disclosure, the transmission of a first SSB set occupies an eighth time unit, and the first SSB set is transmitted at least twice within consecutive eighth time units; and / or, the transmission of a first PBCH set occupies a ninth time unit, and the first PBCH set is transmitted at least twice within consecutive ninth time units; and / or, the transmission of a second SSB set occupies a tenth time unit, and the second SSB set is transmitted at least twice within consecutive tenth time units; wherein, the eighth time unit is a half-frame, a subframe, or Q8 orthogonal frequency division multiplexing (OFDM) symbols, and Q8 is a positive integer; and / or, the ninth time unit is a half-frame, a subframe, or Q9 orthogonal frequency division multiplexing (OFDM) symbols, and Q9 is a positive integer; and / or, the tenth time unit is a half-frame, a subframe, or Q10 orthogonal frequency division multiplexing (OFDM) symbols, and Q10 is a positive integer. This allows for the repeated transmission of the first SSB set and / or the first PBCH set and / or the second SSB set within a concentrated timeframe, thus better achieving network-side energy saving.

[0104] In this embodiment of the disclosure, the starting transmission time of the first first SSB set is the start time of the K5th eighth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first first PBCH set is the start time of the K6th ninth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first second SSB set is the start time of the K7th tenth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first first SSB set is within the interval from the K8th eighth time unit to the K8+L3-1th eighth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first first PBCH set is within the interval from the K9th ninth time unit to the K9+L4-1th ninth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first second SSB set is within the interval from the K10th tenth time unit to the K10+L5-1th tenth time unit after the terminal sends the first trigger signal. Within the interval of the first SSB set; and / or, the start transmission time of the first SSB set is within the first eleventh time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; and / or, the start transmission time of the first PBCH set is within the first twelfth time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; and / or, the start transmission time of the first SSB set is within the first thirteenth time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; wherein, the eleventh time unit is a half-frame, a subframe, or Q11 orthogonal frequency division multiplexing (OFDM) symbols, and Q11 is a positive integer; and / or, the twelfth time unit is a half-frame, a subframe, or Q12 orthogonal frequency division multiplexing (OFDM) symbols, and Q12 is a positive integer; and / or, the thirteenth time unit is a half-frame, a subframe, or Q13 orthogonal frequency division multiplexing (OFDM) symbols, and Q13 is a positive integer. This allows for the specific and clear start time of the first SSB set and / or the first PBCH set and / or the second SSB set.

[0105] The process of receiving synchronization information from the network-side device includes: monitoring the interval from the K8th eighth time unit to the K8+L3-1th eighth time unit after the first trigger signal is sent, and receiving the first SSB set; and / or, monitoring the interval from the K9th ninth time unit to the K9+L4-1th ninth time unit after the first trigger signal is sent, and receiving the first PBCH set; and / or, monitoring the interval from the K10th tenth time unit to the K10+L5-1th tenth time unit after the first trigger signal is sent, and receiving the second SSB set. This ensures accurate reception of relevant synchronization information.

[0106] Furthermore, the synchronization information transmission method further includes: sending a trigger signal to the network-side device; the trigger signal includes the first trigger signal and / or the second trigger signal. This allows the network-side device to decide whether to send on-demand signals (i.e., at least one of the aforementioned first SSB set, first PBCH set, second SSB set, fourth SSB set, and second PBCH set).

[0107] It should be noted that the relevant content on the network-side device side and the terminal side can be referenced interchangeably, and repeated details will not be elaborated upon. Furthermore, the relevant content of the third SSB set (such as the content related to transmission) can also be found in the relevant content of the first SSB set and / or the second SSB set, and will not be elaborated upon here.

[0108] The following is an example of the synchronization information transmission method provided in the embodiments of this disclosure, with the network-side device being the first base station and the terminal being the first terminal.

[0109] To address the aforementioned technical problems, and in order to achieve better energy conservation for base stations under light load conditions while ensuring that the initial access experience for users is not significantly affected, this disclosure provides a synchronization information transmission method, specifically a method for transmitting energy-saving synchronization signal blocks; mainly involving:

[0110] The first base station transmits a target SSB set that can be used for initial access of the first terminal, and each SSB in the target SSB set is transmitted multiple times (in this case, the target SSB set may correspond to the second SSB set mentioned above, and at least one SSB in the second SSB set is repeatedly transmitted); or, each SSB in the target SSB set is transmitted once or multiple times, and the first base station may also transmit a first PBCH set once or multiple times within one SSB period (i.e., within the period of transmitting the target SSB set) (in this case, the target SSB set may correspond to the first SSB set mentioned above, and the first PBCH set may correspond to the first PBCH set mentioned above); or, the target SSB set is transmitted with a period greater than 20ms (in this case, the target SSB set may correspond to the third SSB set mentioned above).

[0111] Subsequently, the first terminal measures the target SSB set, or measures the target SSB set and the first PBCH set, to complete downlink synchronization; this can correspond to the synchronization information sent by the network-side device mentioned above; wherein, the synchronization information includes the first synchronization signal block SSB set and the first physical broadcast channel PBCH set; or, the synchronization information includes a second SSB set, at least one SSB in the second SSB set being repeatedly transmitted; or, the synchronization information includes a third SSB set with a transmission period greater than 20ms, the third SSB set being used for the initial access of the terminal; and a broadcast message is obtained based on the synchronization information.

[0112] Furthermore, the first terminal may send a third trigger signal (which may be included in or be the second trigger signal) to the first base station, triggering the first base station to send a first on-demand SSB set; or, it may send a fourth trigger signal (which may be included in or be the second trigger signal) to the first base station, triggering the first base station to send a first on-demand PBCH set (which may correspond to at least one of the fourth SSB set and the second PBCH set triggered by the second trigger signal sent by the terminal, corresponding to the synchronization information above). Accordingly:

[0113] The first terminal measures the target SSB set, or measures the target SSB set and the first PBCH set; and the first terminal measures the first on-demand SSB set, or the first on-demand PBCH set, thereby completing downlink synchronization.

[0114] Specifically, it could be: the first terminal measures the target SSB set, or the target SSB set and the first PBCH set, and then sends a third or fourth trigger signal, and then measures the first on-demand SSB set or the first on-demand PBCH set to complete downlink synchronization.

[0115] The configuration parameters for the trigger signal (which may include the third trigger signal and / or the fourth trigger signal) may be provided by a cell to the first terminal, but are not limited thereto.

[0116] In addition, the transmission of the target SSB set and the first PBCH set can also be implemented by the terminal (which can correspond to at least one of the first SSB set, the first PBCH set, the second SSB set, and the third SSB set being triggered by the first trigger signal sent by the terminal); the relevant triggering content can be found in the relevant content of the third trigger signal and / or the fourth trigger signal (which can correspond to the second trigger signal mentioned above). The following explanation will only use the third trigger signal and the fourth trigger signal as examples, and will not repeat the specific content of the first trigger signal.

[0117] In the case of using a target SSB set alone, transmitting each SSB in a target SSB set once or multiple times may support the terminal receiving multiple SSB burst sets to complete PBCH decoding; and a target SSB set can support the terminal obtaining all initial access-related system information. When the target SSB set is used in conjunction with PBCH or on-demand sets (i.e., the target SSB set combined with a first PBCH set, a first on-demand SSB set, or a first on-demand PBCH set), each SSB in a target SSB set can also be transmitted once to support PBCH decoding.

[0118] The following provides examples illustrating the solutions involved in the embodiments of this disclosure.

[0119] Option 1: Long-period target SSB set + repeated transmission of the first PBCH set within one period (i.e., within the same period of transmitting the long-period target SSB set) (which can correspond to the above synchronization information including the first synchronization signal block SSB set and the first physical broadcast channel PBCH set):

[0120] (1) The base station (i.e. the first base station mentioned above) sends a target SSB set for initial access of the terminal using a first target period value, the first target period value being greater than the second target period value; the first SSB set can be periodically sent through a first period, and the first period being greater than the second period.

[0121] (2) The target SSB set is the SSB set sent according to a period greater than the second target period value.

[0122] (3) The second target period is 20ms; corresponding to the second period of 20ms mentioned above.

[0123] (4) The first target period value is 40ms, 80ms, 160ms or 320ms (corresponding to the above first period of 40ms, 80ms, 160ms or 320ms); the first target period value can even be 640ms, which can be determined according to the application scenario and operator deployment strategy, and is not restricted here.

[0124] (5) The target SSB set contains {4, 8, 64} SSBs (i.e., 4, 8, or 64 SSBs), each SSB having a different SSB index number; this may correspond to the first SSB set mentioned above containing M1 SSBs, each SSB having a different SSB index number; M1 is 4, 8, or 64.

[0125] (6) Within one SSB cycle, in addition to transmitting the target SSB set, the base station may also repeatedly transmit the first PBCH set N1 times (which may correspond to the repeated transmission of the first PBCH set within the transmission cycle of the first SSB set). For example: the first PBCH set is repeatedly transmitted twice.

[0126] (7) The set of SSB index numbers associated with each PBCH in the first PBCH set is the same as the set of SSB index numbers in the target SSB set; this can correspond to the fact that the set of SSB index numbers associated with each PBCH in the first PBCH set is the same as the set of SSB index numbers in the first SSB set.

[0127] (8) The long-period target SSB set is transmitted within the first half-frame (which corresponds to the first SSB set being transmitted within the second time unit; wherein the second time unit is a half-frame); the repeatedly transmitted first PBCH set is transmitted after the resources occupied by the target SSB set (which can be continuous transmission; this can save energy), which corresponds to the first PBCH set being transmitted after the resources occupied by the first SSB set; wherein the resources after the first half-frame may be separated from the target SSB set in the first half-frame by at least one symbol without an SSB. Specifically, the repeatedly transmitted first PBCH set can be transmitted within one or more consecutive half-frames after the first half-frame; which corresponds to the first PBCH set being transmitted after the resources occupied by the first SSB set, including: the first PBCH set is transmitted within a third time unit or within at least two consecutive third time units after the second time unit; wherein the third time unit is a half-frame.

[0128] (9) Each PBCH in the first PBCH set occupies 3 OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the second OFDM symbol occupied by the PBCH also contains the SSS (Secondary Synchronization Signal) of the occupied RE; this corresponds to each PBCH in the first PBCH set occupying 3 OFDM symbols, and the second OFDM symbol occupied by each PBCH carrying the SSS of the occupied resource element RE.

[0129] (10) Each PBCH in the first PBCH set occupies 2 consecutive OFDM symbols; this can correspond to each PBCH in the first PBCH set occupying 2 consecutive OFDM symbols respectively.

[0130] (11) The PBCHs in the first PBCH set are demodulated using DMRS and SSS, or demodulated using only DMRS (DeModulation Reference Signal); at least one PBCH in the first PBCH set can be demodulated using the demodulation reference signal DMRS and SSS, or demodulated using only DMRS.

[0131] Option 2: Long-cycle target SSB set + repeated SSB transmission within one cycle (which can correspond to the second SSB set mentioned above, where at least one SSB in the second SSB set is repeatedly transmitted):

[0132] (12) The base station uses a first target period value to send a target SSB set for initial terminal access, the first target period value being greater than the second target period value; it can periodically send the second SSB set through a third period, and the third period being greater than the fourth period.

[0133] (13) The target SSB set is the set of SSBs sent according to a period greater than the second target period value.

[0134] (14) The second target period is 20ms; which corresponds to the fourth period of 20ms mentioned above.

[0135] (15) The first target period value is 40ms, 80ms, 160ms or 320ms; which can correspond to the above third period of 40ms, 80ms, 160ms or 320ms.

[0136] (16) The target SSB set contains {4,8,64}×N2 SSBs (i.e., 4×N2, 8×N2, or 64×N2), where N2 is a positive integer greater than 1; the second SSB set mentioned above may contain M2×M3 SSBs, where M2 is 4, 8, or 64, and M3 is an integer greater than 1.

[0137] (17) Within one SSB cycle, the base station repeatedly transmits each SSB in the target SSB set N2 times, for example, three times; N2 is a positive integer.

[0138] (18) The long-period target SSB set is transmitted within N2 consecutive half frames or Z1 subframes or Z2 OFDM symbols (Z1 and Z2 are both positive integers); this corresponds to the second SSB set being transmitted within M3 consecutive first time units; wherein, the first time unit is a half frame, a subframe or Q1 orthogonal frequency division multiplexing OFDM symbols, and Q1 is a positive integer.

[0139] (19) The SSBs in the target SSB set are repeated in the manner of beam scanning as a whole, such as: first performing the first beam scan (sending all SSBs in the target SSB set once), then performing the second beam scan, and finally performing the third beam scan; corresponding to the above-mentioned SSBs in the second SSB set being repeatedly sent through the first granularity, the first granularity including: all SSBs in the second SSB set.

[0140] (20) The SSBs in the target SSB set are repeated in the manner of SSB repetition, such as: first, the beam with SSB index number 0 is repeatedly sent three times (i.e., the SSB with index number 0 is sent three times), then the beam with SSB index number 1 is repeatedly sent three times (i.e., the SSB with index number 1 is sent three times again), and so on; the SSBs in the second SSB set mentioned above are repeatedly sent through the first granularity, which includes: some SSBs in the second SSB set.

[0141] Option 3: Long-term target SSB set (which may correspond to the first or second SSB set mentioned above) + on-demand SSB (which may correspond to the fourth SSB set mentioned above):

[0142] (21) The base station sends a set of target SSBs for initial access of the terminal using a first target period value, the first target period value being greater than the second target period value.

[0143] (22) The target SSB set is the set of SSBs sent according to a period greater than the second target period value.

[0144] (23) The second target period is 20ms.

[0145] (24) The first target period value is 40ms, 80ms, 160ms or 320ms.

[0146] (25) The target SSB set contains {4,8,64} SSBs, each with a different SSB index number.

[0147] (26) The terminal receives the target SSB set and completes downlink coarse synchronization. The terminal may send a third trigger signal (which may correspond to the second trigger signal mentioned above) as needed to trigger the base station to send a first on-demand SSB set (which may correspond to the fourth SSB set mentioned above); and the center frequency, subcarrier spacing, physical layer cell identification number, transmission power and other parameters of the SSBs in the first on-demand SSB set are the same as the corresponding parameters of the SSBs in the target SSB set (which may correspond to the first parameter of the SSBs in the fourth SSB set being the same as the first parameter of the SSBs in the first SSB set or the second SSB set; the first parameter includes at least one of the following: center frequency, subcarrier spacing, physical layer cell identification number and transmission power).

[0148] (27) The first on-demand SSB set is sent N3 times, and each first on-demand SSB set occupies a "half-frame"; all first on-demand SSB sets triggered by a third trigger signal are sent within consecutive half-frames; the transmission of a fourth SSB set may correspond to a fourth time unit, and the fourth SSB set is sent at least twice and within consecutive fourth time units; the fourth time unit is a half-frame.

[0149] (28) Scheme 3-1: The starting position (i.e. the starting transmission time) of the first first on-demand SSB set is the start time of the K1th half frame after the terminal sends the third trigger signal (i.e., the first time slot of the K1th half frame); which can correspond to the starting transmission time of the first fourth SSB set mentioned above being the start time of the K1th fourth time unit after the terminal sends the second trigger signal.

[0150] (29) The starting position of the first on-demand SSB set is within the interval from the K3th half-frame to the K3+L1-1th half-frame after the terminal sends the third trigger signal (Scheme 3-2); this corresponds to the starting transmission time of the first fourth SSB set being within the interval from the K3th fourth time unit to the K3+L1-1th fourth time unit after the terminal sends the second trigger signal. The terminal listens to the interval from the K3th half-frame to the K3+L1-1th half-frame after the third trigger signal and receives the first on-demand SSB set within this interval; this corresponds to listening to the interval from the K3th fourth time unit to the K3+L1-1th fourth time unit after the second trigger signal and receiving the fourth SSB set.

[0151] (30) The starting position of the first on-demand SSB set is the first time unit after the base station processing time requirement is met, and the base station processing time requirement is predefined; the starting transmission time of the first fourth SSB set mentioned above is within the first sixth time unit after the network-side device processing time requirement is met, and the network-side device processing time requirement is predefined.

[0152] (31) The first on-demand SSB set is a subset of the target SSB set, that is: the first on-demand SSB set contains all or part of the SSBs in the target SSB set; this can correspond to the above-mentioned fourth SSB set being a subset of the first SSB set or the second SSB set.

[0153] (32) The first on-demand SSB set contains only SSBs associated with the beam direction used by the third trigger signal; the fourth SSB set may include SSBs associated with the beam direction used by the second trigger signal.

[0154] (33) The base station decides (or determines) whether to send the first on-demand SSB set, that is: even if the terminal sends the third trigger signal, the base station may still not send the first on-demand SSB set; this may correspond to receiving the trigger signal sent by the terminal as described above; the trigger signal includes the second trigger signal; based on the second trigger signal, it determines whether to send the fourth SSB set; if it determines to send based on the second trigger signal, it sends the fourth SSB set to the terminal.

[0155] It should be noted that when the long-period target SSB set corresponds to the first SSB set mentioned above, this scheme 3 may be implemented without combining it with the first PBCH set mentioned above, but it is not limited to this.

[0156] Option 4: Long-term target SSB set (which may correspond to the first or second SSB set mentioned above) + on-demand PBCH transmission (which may correspond to the second PBCH set mentioned above):

[0157] (34) The base station sends the target SSB set for initial access of the terminal using the first target period value, which is greater than the second target period value.

[0158] (35) The target SSB set is the set of SSBs sent according to a period greater than the second target period value.

[0159] (36) The second target period is 20ms.

[0160] (37) The first target period value is 40ms, 80ms, 160ms or 320ms.

[0161] (38) The target SSB set contains {4,8,64} SSBs, each with a different SSB index number.

[0162] (39) The terminal receives the target SSB set and completes downlink coarse synchronization. The terminal may send a fourth trigger signal (which may correspond to the second trigger signal mentioned above) as needed to trigger the base station to send a first on-demand PBCH set (which may correspond to the second PBCH set mentioned above); and the center frequency, subcarrier spacing, transmission power and other parameters of the PBCH in the first on-demand PBCH set are the same as the corresponding parameters of the PBCH contained in the SSB in the target SSB set (which may correspond to the second parameter of the PBCH in the second PBCH set being the same as the second parameter of the PBCH contained in the first SSB set or the SSB in the second SSB set; the second parameter includes at least one of the following: center frequency, subcarrier spacing and transmission power).

[0163] (40) The first on-demand PBCH set is sent N4 times, and each first on-demand PBCH set occupies a "half-frame"; all first on-demand PBCH sets triggered by a fourth trigger signal are sent within consecutive half-frames; the transmission of a second PBCH set may correspond to a fifth time unit, and the second PBCH set is sent at least twice and within consecutive fifth time units; the fifth time unit is a half-frame.

[0164] (41) Scheme 4-1: The starting position of the first on-demand PBCH set (i.e. the starting transmission time) is the start time of the K2 half-frame after the terminal sends the fourth trigger signal (i.e., the first time slot of the K2 half-frame); which corresponds to the starting transmission time of the first second PBCH set being the start time of the K2 fifth time unit after the terminal sends the second trigger signal.

[0165] (42) The starting position of the first on-demand PBCH set is within the interval from the K4th half-frame to the K4+L2-1th half-frame after the terminal sends the fourth trigger signal (Scheme 4-2); this corresponds to the starting transmission time of the first second PBCH set being within the interval from the K4th fifth time unit to the K4+L2-1th fifth time unit after the terminal sends the second trigger signal. The terminal listens to the interval from the K4th half-frame to the K4+L2-1th half-frame after the fourth trigger signal and receives the first on-demand PBCH set within this interval; this corresponds to listening to the interval from the K4th fifth time unit to the K4+L2-1th fifth time unit after the second trigger signal and receiving the second PBCH set.

[0166] (43) The starting position of the first on-demand PBCH set is the first time unit after the base station processing time requirement is met, and the base station processing time requirement is predefined; the starting transmission time of the first second PBCH set mentioned above is within the first seventh time unit after the network-side device processing time requirement is met, and the network-side device processing time requirement is predefined.

[0167] (44) The first on-demand PBCH set is a subset of the PBCHs contained in the SSBs of the target SSB set, that is: the first on-demand PBCH set contains all or part of the PBCHs contained in the SSBs of the target SSB set; this can correspond to the above-mentioned second PBCH set being a subset of the PBCHs contained in the SSBs of the first SSB set or the second SSB set.

[0168] (45) The first on-demand PBCH set contains only PBCHs associated with the beam direction used by the fourth trigger signal; the second PBCH set may include PBCHs associated with the beam direction used by the second trigger signal.

[0169] (46) The base station decides (or determines) whether to send the first on-demand PBCH set, that is: even if the terminal sends the fourth trigger signal, the base station may still not send the first on-demand PBCH set; this may correspond to receiving the trigger signal sent by the terminal as described above; the trigger signal includes the second trigger signal; based on the second trigger signal, it determines whether to send the second PBCH set; if it determines to send based on the second trigger signal, it sends the second PBCH set to the terminal.

[0170] It should be noted that when the long-period target SSB set corresponds to the first SSB set mentioned above, this scheme 4 can be implemented without combining it with the first PBCH set mentioned above, but it is not limited to this.

[0171] It should be noted that the relevant content of the above schemes can be referred to each other, and the repeated parts will not be repeated. Among them, at least one of the parameters N1, K (e.g., K1) and L (e.g., L1) involved in this scheme can be a positive integer greater than 0, and there is no restriction here.

[0172] The following provides a specific example illustrating this solution.

[0173] Example 1 (Scheme 1: Long-period target SSB set + repeated first PBCH set within one period):

[0174] The solution in this embodiment may include:

[0175] The first base station sends a target SSB set for initial access of the first terminal. Each SSB in the target SSB set is sent once or multiple times, and the first base station also sends a first PBCH set once or multiple times within an SSB cycle.

[0176] The first terminal measures the target SSB set and the first PBCH set to complete downlink synchronization.

[0177] Specifically, to reduce base station energy consumption, the base station (i.e., the first base station) uses a first target period value to send a target SSB set for initial terminal access. This target SSB set is a set of SSBs sent at a period longer than a second target period value; the first target period value is greater than the second target period value. The second target period value is 20ms. The first target period value can be 40ms, 80ms, 160ms, or 320ms. The target SSB set contains {4, 8, 64} SSBs, each with a different SSB index number. However, when decoding the PBCH, the terminal often needs to receive multiple SSBs to successfully decode it (performance evaluation typically suggests 3 SSBs). Therefore, using the current scheme, if a long-period SSB of 80ms is used, the terminal would need up to 240ms to complete the decoding of 3 SSBs, resulting in a long initial access delay.

[0178] To address the above issues, within one SSB cycle, the base station, in addition to transmitting the target SSB set, also repeatedly transmits the first PBCH set N1 times, for example, twice. The SSB index set associated with each PBCH in the first PBCH set is the same as the SSB index set in the target SSB set. The target SSB set with a long cycle is transmitted within the first half-frame, and the repeatedly transmitted first PBCH set is transmitted within one or more consecutive half-frames following the first half-frame. As shown in Figure 6, the base station transmits the target SSB set and the first PBCH set twice within three half-frames (i.e., three 5ms intervals). In this way, the terminal can improve the PBCH decoding success rate by receiving and merging the PBCHs contained in the SSBs of the target SSB set and the PBCHs in the first PBCH set. The base station, by transmitting all SSBs or PBCHs in a short period, has more time to enter deep sleep mode, achieving energy saving.

[0179] In addition, each PBCH in the first PBCH set occupies 3 OFDM symbols, and the second OFDM symbol occupied by the PBCH also includes the SSS occupying part of the RE, as shown in Figure 7 (Schematic diagram of PBCHs in the first PBCH set) (a); or, each PBCH in the first PBCH set occupies 2 consecutive OFDM symbols, as shown in Figure 7 (b). The PBCHs in the first PBCH set are demodulated using DMRS and SSS, or demodulated using only DMRS.

[0180] Therefore, using the method provided in this embodiment, the base station transmits the target SSB set for initial terminal access at a period of 80ms. Each SSB in the target SSB set is transmitted once, and the first base station also transmits the first PBCH set twice within one SSB period. The terminal measures the target SSB set and the first PBCH set to complete downlink synchronization. Using this method, the base station's energy consumption is reduced by increasing the period of the SSBs used for initial access, and the impact of the increased SSB period on terminal access latency is mitigated by repeatedly transmitting the PBCH.

[0181] Example 2 (Scheme 2: Long-term target SSB set + repeated SSB issuance within one cycle):

[0182] The solution in this embodiment may include:

[0183] The first base station sends a set of target SSBs for the initial access of the first terminal, and each SSB in the target SSB set is sent multiple times.

[0184] The first terminal measures the target SSB set and completes downlink synchronization.

[0185] Specifically, to reduce base station energy consumption, the base station uses a first target period value to send a target SSB set for initial terminal access. This target SSB set is a set of SSBs sent with a period longer than a second target period value; the first target period value is greater than the second target period value. The second target period value is 20ms. The first target period value can be 40ms, 80ms, 160ms, or 320ms. However, when decoding the PBCH, the terminal often needs to receive multiple SSBs to successfully decode it (performance evaluation typically suggests three SSBs). Therefore, using the current solution, if a long-period SSB of 80ms is used, the terminal would need up to 240ms to complete the decoding of three SSBs, resulting in a long initial access delay.

[0186] To address the above issues, the target SSB set transmitted within one SSB cycle can contain {4, 8, 64} × N² SSBs, where N² is a positive integer greater than 1. The long-cycle target SSB set is transmitted over N² consecutive half-frames. As shown in Figure 8, the base station retransmits the target SSB set three times within three half-frames (i.e., three 5ms intervals). In other words, within one SSB cycle, each SSB in the target SSB set will ultimately be retransmitted three times.

[0187] Regarding the method of SSB duplication in the target SSB set, either of the following two methods can be used:

[0188] The first method is: the SSBs in the target SSB set are repeated in the manner of beam scanning as a whole, that is: first beam scan, then second beam scan, and finally third beam scan.

[0189] The second method is: the SSBs in the target SSB set are repeated in the manner of SSB repetition, that is: first, the beam with SSB index number 0 is repeated three times, then the beam with SSB index number 1 is repeated three times, and so on.

[0190] In this way, the terminal can improve the decoding success rate of PBCH by receiving and merging SSBs from the three target SSB sets (or merging the PBCHs contained in the SSBs of the three target SSB sets). Simultaneously, the terminal can also improve the accuracy of time-frequency synchronization by receiving the PSS (Primary Synchronization Signal) and SSS from the three target SSB sets. Furthermore, the base station can achieve energy savings by transmitting all SSBs in a concentrated manner within a short period, allowing it more time to enter deep sleep mode.

[0191] Therefore, using the method provided in this embodiment, the base station transmits the target SSB set for initial terminal access at a period of 80ms, with each SSB in the target SSB set being transmitted three times. The terminal measures the target SSB set and completes downlink synchronization by merging the received SSBs (or merging the PBCH contained in the received SSBs). Using this method, by increasing the period of the SSBs used for initial access, the base station's energy consumption is reduced, and by repeatedly transmitting SSBs, the impact of the increased SSB period on terminal access latency is mitigated.

[0192] Example 3 (Scheme 3-1: Long-period target SSB set + on-demand SSB transmission + fixed timing):

[0193] The solution in this embodiment may include:

[0194] The first base station sends a set of target SSBs for the initial access of the first terminal, and each SSB in the target SSB set is sent once or multiple times.

[0195] The first terminal sends a third trigger signal to the first base station, triggering the first base station to send the first on-demand SSB set. The first terminal measures the target SSB set and the first on-demand SSB set to complete downlink synchronization.

[0196] Specifically, to reduce base station energy consumption, the base station uses a first target period value to send a target SSB set for initial terminal access. This target SSB set is a set of SSBs sent with a period longer than a second target period value; the first target period value is greater than the second target period value. The second target period value is 20ms. The first target period value can be 40ms, 80ms, 160ms, or 320ms. However, when decoding the PBCH, the terminal often needs to receive multiple SSBs to successfully decode it (performance evaluation typically suggests three SSBs). Therefore, using the current solution, if a long-period SSB of 80ms is used, the terminal would need up to 240ms to complete the decoding of three SSBs, resulting in a long initial access delay.

[0197] To address the above issues, the terminal receives the target SSB set and completes downlink coarse synchronization. Based on needs (e.g., if the terminal deems it necessary to receive more SSBs to assist with downlink fine synchronization or PBCH decoding), the terminal can send a third trigger signal to trigger the base station to send the first on-demand SSB set. The first on-demand SSB set is sent N3 times, with each first on-demand SSB set occupying one "half-frame"; all first on-demand SSB sets triggered by a third trigger signal can be sent (completed) within consecutive half-frames. Since the terminal in the initial access phase has not yet established a connection with the base station, it cannot receive dedicated signaling from the base station; therefore, the configuration parameters of the first on-demand SSB set can be configured using a predefined method.

[0198] The center frequency, subcarrier spacing, physical layer cell identification number, and transmit power of the SSBs in the first on-demand SSB set are the same as the corresponding parameters of the SSBs in the target SSB set. In this way, the terminal does not need to receive additional configuration indication signaling for the on-demand SSBs.

[0199] The starting position of the first on-demand SSB set can also be agreed upon in advance with the terminal to avoid indicating it using signaling. The starting position of the first on-demand SSB set can be the start time of the K1th half-frame after the terminal sends the third trigger signal (i.e., the first time slot of the K1th half-frame). For example, as shown in Figure 9, after the terminal sends the third trigger signal, the base station will send the first on-demand SSB set twice. Its starting position is the first half-frame after the terminal sends the third trigger signal.

[0200] To further reduce base station energy consumption, the first on-demand SSB set may not contain all SSBs; that is: 1) the first on-demand SSB set may be a subset of the target SSB set, specifically: the first on-demand SSB set contains all or some of the SSBs in the target SSB set; or, 2) the first on-demand SSB set only contains SSBs associated with the beam direction used by the third trigger signal. Furthermore, the base station can decide whether to transmit the first on-demand SSB set; that is, even if the terminal transmits the third trigger signal, the base station may still not transmit the first on-demand SSB set.

[0201] In this way, the terminal can improve the PBCH decoding success rate by receiving and merging SSBs from the target SSB set and SSBs from the two first on-demand SSB sets (or merging the PBCHs contained in the SSBs of the target SSB set and the PBCHs contained in the SSBs of the two first on-demand SSB sets). Simultaneously, the terminal can also improve the accuracy of time-frequency synchronization by receiving the PSS and SSS from the target SSB set and the two first on-demand SSB sets. Meanwhile, the base station can also achieve energy saving by transmitting all SSBs in a concentrated manner within a short period, allowing more time to enter deep sleep mode.

[0202] Therefore, using the method provided in this embodiment, the base station transmits the target SSB set for initial terminal access at a period of 80ms, and the terminal triggers the base station to transmit the first on-demand SSB set by sending a third trigger signal; then, the terminal completes downlink synchronization by merging the received SSBs (or merging the PBCH contained in the received SSBs). Using this method, by increasing the period of the SSBs used for initial access, the base station's energy consumption is reduced, and by transmitting on-demand SSBs, the impact of the increased SSB period on terminal access latency is mitigated.

[0203] Example 4 (Scheme 3-2: Long-term target SSB set + on-demand SSB transmission + monitoring interval):

[0204] The solution in this embodiment may include:

[0205] The first base station sends a set of target SSBs for the initial access of the first terminal, and each SSB in the target SSB set is sent once or multiple times.

[0206] The first terminal sends a third trigger signal to the first base station, triggering the first base station to send the first on-demand SSB set. The first terminal measures the target SSB set and the first on-demand SSB set to complete downlink synchronization.

[0207] Specifically, to reduce base station energy consumption, the base station uses a first target period value to send a target SSB set for initial terminal access. This target SSB set is a set of SSBs sent with a period longer than a second target period value; the first target period value is greater than the second target period value. The second target period value is 20ms. The first target period value can be 40ms, 80ms, 160ms, or 320ms. However, when decoding the PBCH, the terminal often needs to receive multiple SSBs to successfully decode it (performance evaluation typically suggests three SSBs). Therefore, using the current solution, if a long-period SSB of 80ms is used, the terminal would need up to 240ms to complete the decoding of three SSBs, resulting in a long initial access delay.

[0208] To address the above issues, the terminal receives the target SSB set and completes downlink coarse synchronization. Based on needs (e.g., if the terminal deems it necessary to receive more SSBs to assist with downlink fine synchronization or PBCH decoding), the terminal can send a third trigger signal to trigger the base station to send the first on-demand SSB set. The first on-demand SSB set is sent N3 times, with each first on-demand SSB set occupying one "half-frame"; all first on-demand SSB sets triggered by a third trigger signal can be sent (completed) within consecutive half-frames. Since the terminal in the initial access phase has not yet established a connection with the base station, it cannot receive dedicated signaling from the base station; therefore, the configuration parameters of the first on-demand SSB set can be configured using a predefined method.

[0209] The center frequency, subcarrier spacing, physical layer cell identification number, and transmit power of the SSBs in the first on-demand SSB set are the same as the corresponding parameters of the SSBs in the target SSB set. In this way, the terminal does not need to receive additional configuration indication signaling for the on-demand SSBs.

[0210] The starting position of the first on-demand SSB set can be agreed upon in advance with the terminal to avoid indicating it using signaling. Considering that the base station may select one or more suitable half-frames to send the first on-demand SSB set within a time interval, the starting position of the first on-demand SSB set can be within the interval from the K3th half-frame to the K3+L1-1th half-frame after the terminal sends the third trigger signal. In this way, the terminal can monitor the downlink signal within the interval from the K3th half-frame to the K3+L1-1th half-frame after sending the third trigger signal to receive the first on-demand SSB set sent by the base station within this interval (i.e., the time interval for the terminal to listen for on-demand SSBs in the figure). As shown in Figure 10, assuming K3=1 and L1=3, after the terminal sends the third trigger signal, it will listen for the first on-demand SSB set from the 1st to the 3rd half-frame after the third trigger signal. The base station can send the first on-demand SSB set twice in the 2nd and 3rd half-frames after the third trigger signal (once in each half-frame).

[0211] To further reduce base station energy consumption, the first on-demand SSB set may not contain all SSBs; that is: 1) the first on-demand SSB set may be a subset of the target SSB set, specifically: the first on-demand SSB set contains all or some of the SSBs in the target SSB set; or, 2) the first on-demand SSB set only contains SSBs associated with the beam direction used by the third trigger signal. Furthermore, the base station can decide whether to transmit the first on-demand SSB set; that is, even if the terminal transmits the third trigger signal, the base station may still not transmit the first on-demand SSB set.

[0212] In this way, the terminal can improve the PBCH decoding success rate by receiving and merging SSBs from the target SSB set and SSBs from the two first on-demand SSB sets (or merging the PBCHs contained in the SSBs of the target SSB set and the PBCHs contained in the SSBs of the two first on-demand SSB sets). Simultaneously, the terminal can also improve the accuracy of time-frequency synchronization by receiving the PSS and SSS from the target SSB set and the two first on-demand SSB sets. Meanwhile, the base station can also achieve energy saving by transmitting all SSBs in a concentrated manner within a short period, allowing more time to enter deep sleep mode.

[0213] Therefore, using the method provided in this embodiment, the base station transmits the target SSB set for initial terminal access at a period of 80ms, and the terminal triggers the base station to transmit the first on-demand SSB set by sending a third trigger signal; then, the terminal completes downlink synchronization by merging the received SSBs (or merging the PBCH contained in the received SSBs). Using this method, by increasing the period of the SSBs used for initial access, the base station's energy consumption is reduced, and by transmitting on-demand SSBs, the impact of the increased SSB period on terminal access latency is mitigated.

[0214] Example 5 (Scheme 4-1: Long-period target SSB set + on-demand PBCH transmission + fixed timing):

[0215] The solution in this embodiment may include:

[0216] The first base station sends a set of target SSBs for the initial access of the first terminal, and each SSB in the target SSB set is sent once or multiple times.

[0217] The first terminal sends a fourth trigger signal to the first base station, triggering the first base station to send the first on-demand PBCH set. The first terminal measures the target SSB set and the first on-demand PBCH set to complete downlink synchronization.

[0218] Specifically, to reduce base station energy consumption, the base station uses a first target period value to send a target SSB set for initial terminal access. This target SSB set is a set of SSBs sent with a period longer than a second target period value; the first target period value is greater than the second target period value. The second target period value is 20ms. The first target period value can be 40ms, 80ms, 160ms, or 320ms. However, when decoding the PBCH, the terminal often needs to receive multiple SSBs to successfully decode it (performance evaluation typically suggests three SSBs). Therefore, using the current solution, if a long-period SSB of 80ms is used, the terminal would need up to 240ms to complete the decoding of three SSBs, resulting in a long initial access delay.

[0219] To address the above issues, the terminal receives the target SSB set and completes downlink coarse synchronization. Based on needs (e.g., if the terminal deems it necessary to receive more SSBs to assist with downlink fine synchronization or PBCH decoding), the terminal can send a fourth trigger signal to trigger the base station to send the first on-demand PBCH set. The first on-demand PBCH set is sent N4 times, with each first on-demand PBCH set occupying one "half-frame"; all first on-demand PBCH sets triggered by a fourth trigger signal can be sent (completed) within consecutive half-frames. Since the terminal in the initial access phase has not yet established a connection with the base station, it cannot receive dedicated signaling from the base station; therefore, the configuration parameters of the first on-demand PBCH set can be configured using predefined methods.

[0220] The parameters such as center frequency, subcarrier spacing, physical layer cell identification number, and transmit power of the PBCH in the first on-demand PBCH set are the same as the corresponding parameters of the PBCH contained in the SSB in the target SSB set. In this way, the terminal does not need to receive additional on-demand PBCH configuration indication signaling.

[0221] The starting position of the first on-demand PBCH set can be agreed upon in advance with the terminal to avoid indicating it using signaling. The starting position of the first on-demand PBCH set can be the start time of the K2th half-frame after the terminal sends the fourth trigger signal (i.e., the first time slot of the K2th half-frame). For example, as shown in Figure 11, after the terminal sends the fourth trigger signal, the base station will send the first on-demand PBCH set twice. Its starting position is the first half-frame after the terminal sends the fourth trigger signal.

[0222] To further reduce base station power consumption, the first on-demand PBCH set may not contain all PBCHs; that is: 1) the first on-demand PBCH set may be a subset of the PBCHs contained in the SSBs of the target SSB set, specifically: the first on-demand PBCH set contains all or some of the PBCHs contained in the SSBs of the target SSB set; or, 2) the first on-demand PBCH set only contains PBCHs associated with the beam direction used by the fourth trigger signal. Furthermore, the base station can decide whether to transmit the first on-demand PBCH set; that is, even if the terminal transmits the fourth trigger signal, the base station may still not transmit the first on-demand PBCH set.

[0223] In this way, the terminal can improve the PBCH decoding success rate by receiving and merging the PBCHs contained in the SSBs of the target SSB set and the PBCHs in the two first on-demand PBCH sets. Meanwhile, the base station can also achieve energy savings by transmitting all SSBs and / or PBCHs in a concentrated manner within a short period, allowing it more time to enter deep sleep mode.

[0224] Therefore, using the method provided in this embodiment, the base station transmits the target SSB set for initial terminal access at a period of 80ms, and the terminal triggers the base station to transmit the first on-demand PBCH set by sending a fourth trigger signal; then the terminal completes downlink synchronization by merging the received PBCHs. Using this method, by increasing the period of the SSBs used for initial access, the base station's energy consumption is reduced, and by transmitting on-demand PBCHs, the impact of the increased SSB period on terminal access latency is mitigated.

[0225] Example 6 (Scheme 4-2: Long-period target SSB set + on-demand PBCH transmission + monitoring interval):

[0226] The solution in this embodiment may include:

[0227] The first base station sends a set of target SSBs for the initial access of the first terminal, and each SSB in the target SSB set is sent once or multiple times.

[0228] The first terminal sends a fourth trigger signal to the first base station, triggering the first base station to send the first on-demand PBCH set. The first terminal measures the target SSB set and the first on-demand PBCH set to complete downlink synchronization.

[0229] Specifically, to reduce base station energy consumption, the base station uses a first target period value to send a target SSB set for initial terminal access. This target SSB set is a set of SSBs sent with a period longer than a second target period value; the first target period value is greater than the second target period value. The second target period value is 20ms. The first target period value can be 40ms, 80ms, 160ms, or 320ms. However, when decoding the PBCH, the terminal often needs to receive multiple SSBs to successfully decode it (performance evaluation typically suggests three SSBs). Therefore, using the current solution, if a long-period SSB of 80ms is used, the terminal would need up to 240ms to complete the decoding of three SSBs, resulting in a long initial access delay.

[0230] To address the above issues, the terminal receives the target SSB set and completes downlink coarse synchronization. Based on needs (e.g., if the terminal deems it necessary to receive more SSBs to assist with downlink fine synchronization or PBCH decoding), the terminal can send a fourth trigger signal to trigger the base station to send the first on-demand PBCH set. The first on-demand PBCH set is sent N4 times, with each first on-demand PBCH set occupying one "half-frame"; all first on-demand PBCH sets triggered by a fourth trigger signal can be sent (completed) within consecutive half-frames. Since the terminal in the initial access phase has not yet established a connection with the base station, it cannot receive dedicated signaling from the base station; therefore, the configuration parameters of the first on-demand PBCH set can be configured using a predefined method.

[0231] The parameters such as center frequency, subcarrier spacing, physical layer cell identification number, and transmit power of the PBCH in the first on-demand PBCH set are the same as the corresponding parameters of the PBCH contained in the SSB in the target SSB set. In this way, the terminal does not need to receive additional on-demand PBCH configuration indication signaling.

[0232] The starting position of the first on-demand PBCH set can be agreed upon in advance with the terminal to avoid indicating it using signaling. Considering that the base station may select one or more suitable half-frames to send the first on-demand PBCH set within a time interval, the starting position of the first on-demand PBCH set can be within the interval from the K4th half-frame to the K4+L2-1th half-frame after the terminal sends the fourth trigger signal. In this way, the terminal can monitor the downlink signal within the interval from the K4th half-frame to the K4+L2-1th half-frame after sending the fourth trigger signal to receive the first on-demand PBCH set sent by the base station within this interval (i.e., the time interval for the terminal to listen for on-demand PBCH in the figure). As shown in Figure 12, assuming K=1 and L=3, after the terminal sends the fourth trigger signal, it will listen for the first on-demand PBCH set from the 1st to the 3rd half-frame after the fourth trigger signal. The base station can send the first on-demand PBCH set twice in the 2nd and 3rd half-frames after the fourth trigger signal (once in each half-frame).

[0233] To further reduce base station power consumption, the first on-demand PBCH set may not contain all PBCHs; that is: 1) the first on-demand PBCH set may be a subset of the PBCHs contained in the SSBs of the target SSB set, specifically: the first on-demand PBCH set contains all or some of the PBCHs contained in the SSBs of the target SSB set; or, 2) the first on-demand PBCH set only contains PBCHs associated with the beam direction used by the fourth trigger signal. Furthermore, the base station can decide whether to transmit the first on-demand PBCH set; that is, even if the terminal transmits the fourth trigger signal, the base station may still not transmit the first on-demand PBCH set.

[0234] In this way, the terminal can improve the PBCH decoding success rate by receiving and merging the PBCHs contained in the SSBs of the target SSB set and the PBCHs in the two first on-demand PBCH sets. Meanwhile, the base station can also achieve energy savings by transmitting all SSBs and / or PBCHs in a concentrated manner within a short period, allowing it more time to enter deep sleep mode.

[0235] Therefore, using the method provided in this embodiment, the base station transmits the target SSB set for initial terminal access at a period of 80ms, and the terminal triggers the base station to transmit the first on-demand PBCH set by sending a fourth trigger signal; then the terminal completes downlink synchronization by merging the received PBCHs. Using this method, by increasing the period of the SSBs used for initial access, the base station's energy consumption is reduced, and by transmitting on-demand PBCHs, the impact of the increased SSB period on terminal access latency is mitigated.

[0236] It should be noted that the relevant content of the above embodiments can be referred to each other, and repeated parts will not be described again. In addition, regarding the network-side device triggering at least one of the first SSB set, the first PBCH set, the second SSB set, the third SSB set, the fourth SSB set, and the second PBCH set, please refer to the relevant content of the third trigger signal and / or the fourth trigger signal above, and will not be elaborated here; furthermore, the triggering of "at least one of the first SSB set, the first PBCH set, the second SSB set, and the third SSB set" can also be used in combination with "at least one of the triggering fourth SSB set and the second PBCH set", and the specific details can be referred to the implementation of the above embodiments, and will not be described again here.

[0237] In summary, this solution proposes a method for transmitting energy-saving synchronization signal blocks, involving: a base station transmitting a target SSB set for initial terminal access, wherein each SSB in the target SSB set is transmitted multiple times; or, each SSB in the target SSB set is transmitted once or multiple times, and the first base station also transmits a first PBCH set once or multiple times within one SSB cycle. Subsequently, the terminal measures the target SSB set, or the target SSB set and the first PBCH set, to complete downlink synchronization. Further, the terminal can send a trigger signal (corresponding to the aforementioned second trigger signal) to the base station, triggering the base station to transmit a first on-demand SSB set or a first on-demand PBCH set. The terminal measures the target SSB set or the first PBCH set, and measures the first on-demand SSB set or the first on-demand PBCH set to complete downlink synchronization. The period of the target SSB set can be configured to a large value. Using the method provided in this embodiment, by increasing the period of the SSBs used for initial access, the energy consumption of the base station is reduced, and by repeatedly transmitting or transmitting SSBs or PBCHs on demand, the impact of increased SSB periods on terminal access latency is mitigated.

[0238] The reason why repeated transmissions can mitigate the impact of increased SSB periods on terminal access latency is as follows: A terminal typically needs to receive multiple SSB burst sets to complete PBCH decoding. For example, if the SSB period is 80ms, the terminal needs three 80ms intervals to receive three SSB burst sets and complete PBCH decoding. If the SSB burst set is repeatedly transmitted three times within one 80ms SSB period, PBCH decoding can be completed within one 80ms period, thus reducing terminal access latency.

[0239] This disclosure also provides a synchronization information transmission device, which is a network-side device, as shown in FIG13, including a memory 131, a transceiver 132, and a processor 133.

[0240] Memory 131 is used to store computer programs; transceiver 132 is used to send and receive data under the control of processor 133; processor 133 is used to read the computer program in memory 131 and perform the following operations:

[0241] The transceiver 132 sends synchronization information to the terminal; wherein the synchronization information includes a first synchronization signal block (SSB) set and a first physical broadcast channel (PBCH) set.

[0242] Alternatively, the synchronization information includes a second SSB set, in which at least one SSB is repeatedly transmitted;

[0243] Alternatively, the synchronization information may include a third SSB set with a transmission period greater than 20ms, the third SSB set being used for the initial access of the terminal.

[0244] The synchronization information transmission device provided in this embodiment sends synchronization information to the terminal; wherein, the synchronization information includes a first synchronization signal block (SSB) set and a first physical broadcast channel (PBCH) set; or, the synchronization information includes a second SSB set, at least one SSB in the second SSB set being repeatedly transmitted; or, the synchronization information includes a third SSB set with a transmission period greater than 20ms, the third SSB set being used for the initial access of the terminal; it can support the combination of the first SSB set and the first PBCH set, or the repeated transmission of SSBs in the second SSB set, or the transmission of a third SSB set with a long period, so that the terminal obtains relevant system information and completes synchronization. It can avoid the high power consumption caused by periodically transmitting SSBs with a small period (e.g., increasing the SSB period to reduce network-side power consumption), optimize the network-side energy saving effect, and can also avoid the problem of high terminal access latency caused by increasing the SSB period to a certain extent. It effectively solves the problems of poor network-side energy saving effect or high initial terminal access latency in the synchronization information transmission schemes of related technologies.

[0245] Specifically, transceiver 132 is used to receive and send data under the control of processor 133.

[0246] In Figure 13, the bus architecture may include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors represented by processor 133 and memory represented by memory 131. The bus architecture may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 132 may be multiple elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium, including wireless channels, wired channels, optical fibers, etc. Processor 133 is responsible for managing the bus architecture and general processing, and memory 131 may store data used by processor 133 during operation.

[0247] The processor 133 can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor can also adopt a multi-core architecture.

[0248] Wherein, at least one of the first SSB set, the first PBCH set, the second SSB set, and the third SSB set is triggered by a first trigger signal sent by the terminal or by the network-side device; and / or, the synchronization information further includes at least one of the fourth SSB set and the second PBCH set triggered by a second trigger signal sent by the terminal or by the network-side device.

[0249] In this embodiment of the disclosure, at least one of the first SSB set, the first PBCH set, the second SSB set, the third SSB set, the fourth SSB set, and the second PBCH set is an on-demand transmission set.

[0250] In this embodiment of the disclosure, the first SSB set is periodically transmitted through a first period, and the first period is longer than the second period; or, the second SSB set is periodically transmitted through a third period, and the third period is longer than the fourth period; wherein, the second period is 20ms, and / or, the first period is 40ms, 80ms, 160ms, 320ms, 640ms, or 1280ms; or, the fourth period is 20ms, and / or, the third period is 40ms, 80ms, 160ms, 320ms, 640ms, or 1280ms.

[0251] In this embodiment of the disclosure, the first SSB set includes M1 SSBs, each SSB corresponding to a different SSB index number; M1 is 4, 8 or 64; or, the second SSB set includes M2×M3 SSBs, M2 is 4, 8 or 64, and M3 is an integer greater than 1.

[0252] The second SSB set is transmitted within M3 consecutive first time units; wherein the first time unit is a half frame, a subframe, or Q1 orthogonal frequency division multiplexing (OFDM) symbols, and Q1 is a positive integer.

[0253] In this embodiment of the disclosure, the first PBCH set is repeatedly transmitted during the transmission period of the first SSB set.

[0254] In this case, the set of SSB index numbers associated with PBCH in the first PBCH set is the same as the set of SSB index numbers in the first SSB set.

[0255] In this embodiment of the disclosure, the first SSB set is transmitted within a second time unit, and the first PBCH set is transmitted after the resources occupied by the first SSB set are used; wherein, the second time unit is a half frame, a subframe, or Q2 orthogonal frequency division multiplexing (OFDM) symbols, and Q2 is a positive integer.

[0256] The first PBCH set is transmitted after the resources occupied by the first SSB set, including: the first PBCH set is transmitted within a third time unit or within at least two consecutive third time units after the second time unit; wherein the third time unit is a half frame, a subframe, or Q3 orthogonal frequency division multiplexing (OFDM) symbols, and Q3 is a positive integer.

[0257] In this embodiment of the disclosure, each PBCH in the first PBCH set occupies 3 OFDM symbols, and the second OFDM symbol occupied by each PBCH carries the auxiliary synchronization signal SSS of the resource element RE occupying part of the resource element RE; or, each PBCH in the first PBCH set occupies 2 consecutive OFDM symbols.

[0258] In this case, at least one PBCH in the first PBCH set is demodulated by the demodulation reference signal DMRS and SSS, or by DMRS alone.

[0259] In this embodiment of the disclosure, the SSBs in the second SSB set are repeatedly sent through a first granularity, which includes at least a portion of the SSBs in the second SSB set.

[0260] Wherein, the first parameter of the SSB in the fourth SSB set is the same as the first parameter of the SSB in the first SSB set or the second SSB set; the first parameter includes at least one of the following: center frequency, subcarrier spacing, physical layer cell identification number, and transmit power; and / or, the second parameter of the PBCH in the second PBCH set is the same as the second parameter of the PBCH contained in the SSB in the first SSB set or the second SSB set; the second parameter includes at least one of the following: center frequency, subcarrier spacing, and transmit power.

[0261] In this embodiment of the disclosure, the fourth SSB set is a subset of the first SSB set or the second SSB set; and / or, the second PBCH set is a subset of the PBCHs contained in the SSBs of the first SSB set or the second SSB set; and / or, the fourth SSB set includes SSBs associated with the beam direction used by the second trigger signal; and / or, the second PBCH set includes PBCHs associated with the beam direction used by the second trigger signal.

[0262] The transmission of a fourth SSB set occupies a fourth time unit, and the fourth SSB set is transmitted at least twice within consecutive fourth time units; and / or, the transmission of a second PBCH set occupies a fifth time unit, and the second PBCH set is transmitted at least twice within consecutive fifth time units; wherein the fourth time unit is a half-frame, a subframe, or Q4 orthogonal frequency division multiplexing (OFDM) symbols, where Q4 is a positive integer; and / or, the fifth time unit is a half-frame, a subframe, or Q5 orthogonal frequency division multiplexing (OFDM) symbols, where Q5 is a positive integer.

[0263] In this embodiment of the disclosure, the starting transmission time of the first fourth SSB set is the start time of the K1th fourth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first second PBCH set is the start time of the K2th fifth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first fourth SSB set is within the interval from the K3th fourth time unit to the K3+L1-1th fourth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first second PBCH set is within the interval from the K4th fifth time unit to the K4+L2-1th fifth time unit after the terminal sends the second trigger signal. Within the time unit interval; and / or, the start transmission time of the first fourth SSB set is within the first sixth time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; and / or, the start transmission time of the first second PBCH set is within the first seventh time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; wherein, the sixth time unit is a half-frame, a subframe, or Q6 orthogonal frequency division multiplexing (OFDM) symbols, where Q6 is a positive integer; and / or, the seventh time unit is a half-frame, a subframe, or Q7 orthogonal frequency division multiplexing (OFDM) symbols, where Q7 is a positive integer.

[0264] The transmission of a first SSB set occupies an eighth time unit, and the first SSB set is transmitted at least twice within consecutive eighth time units; and / or, the transmission of a first PBCH set occupies a ninth time unit, and the first PBCH set is transmitted at least twice within consecutive ninth time units; and / or, the transmission of a second SSB set occupies a tenth time unit, and the second SSB set is transmitted at least twice within consecutive tenth time units; wherein the eighth time unit is a half-frame, a subframe, or Q8 orthogonal frequency division multiplexing (OFDM) symbols, where Q8 is a positive integer; and / or, the ninth time unit is a half-frame, a subframe, or Q9 orthogonal frequency division multiplexing (OFDM) symbols, where Q9 is a positive integer; and / or, the tenth time unit is a half-frame, a subframe, or Q10 orthogonal frequency division multiplexing (OFDM) symbols, where Q10 is a positive integer.

[0265] In this embodiment of the disclosure, the starting transmission time of the first first SSB set is the start time of the K5th eighth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first first PBCH set is the start time of the K6th ninth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first second SSB set is the start time of the K7th tenth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first first SSB set is within the interval from the K8th eighth time unit to the K8+L3-1th eighth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first first PBCH set is within the interval from the K9th ninth time unit to the K9+L4-1th ninth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first second SSB set is within the interval from the K10th tenth time unit to the K10+L5-1th tenth time unit after the terminal sends the first trigger signal. Within the interval of the first SSB set; and / or, the start transmission time of the first SSB set is within the first eleventh time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; and / or, the start transmission time of the first PBCH set is within the first twelfth time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; and / or, the start transmission time of the first SSB set is within the first thirteenth time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; wherein, the eleventh time unit is a half-frame, a subframe, or Q11 orthogonal frequency division multiplexing (OFDM) symbols, and Q11 is a positive integer; and / or, the twelfth time unit is a half-frame, a subframe, or Q12 orthogonal frequency division multiplexing (OFDM) symbols, and Q12 is a positive integer; and / or, the thirteenth time unit is a half-frame, a subframe, or Q13 orthogonal frequency division multiplexing (OFDM) symbols, and Q13 is a positive integer.

[0266] Furthermore, the operation also includes: receiving a trigger signal sent by the terminal via the transceiver; the trigger signal includes a first trigger signal and / or a second trigger signal; determining, based on the first trigger signal, whether to send at least one of the first SSB set, the first PBCH set, the second SSB set, and the third SSB set; and / or, based on the second trigger signal, determining whether to send at least one of the fourth SSB set and the second PBCH set; wherein, sending synchronization information to the terminal includes: if sending is determined based on the first trigger signal, sending at least one of the first SSB set, the first PBCH set, the second SSB set, and the third SSB set to the terminal; and / or, if sending is determined based on the second trigger signal, sending at least one of the fourth SSB set and the second PBCH set to the terminal.

[0267] It should be noted that the device provided in this embodiment can implement all the method steps implemented in the above network-side device-side method embodiment and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0268] This disclosure also provides a synchronization information transmission device, which is a terminal, as shown in FIG14, including a memory 141, a transceiver 142, and a processor 143.

[0269] Memory 141 is used to store computer programs; transceiver 142 is used to send and receive data under the control of processor 143; processor 143 is used to read the computer program in memory 141 and perform the following operations:

[0270] The transceiver 142 receives synchronization information sent by network-side devices; wherein the synchronization information includes a first set of synchronization signal blocks (SSBs) and a first set of physical broadcast channels (PBCHs); or, the synchronization information includes a second set of SSBs, wherein at least one SSB in the second set of SSBs is repeatedly transmitted; or, the synchronization information includes a third set of SSBs with a transmission period greater than 20ms, wherein the third set of SSBs is used for the initial access of the terminal.

[0271] Based on the synchronization information, a broadcast message is obtained.

[0272] The synchronization information transmission device provided in this embodiment receives synchronization information sent by a network-side device. The synchronization information includes a first set of Synchronization Signal Blocks (SSBs) and a first set of Physical Broadcast Channels (PBCHs). Alternatively, the synchronization information includes a second set of SSBs, where at least one SSB in the second set is repeatedly transmitted. Or, the synchronization information includes a third set of SSBs with a transmission period greater than 20ms, used for initial terminal access. Based on the synchronization information, a broadcast message is obtained. This device supports combining the first SSB set with the first PBCH set, repeatedly transmitting SSBs from the second SSB set, or transmitting a third SSB set with a long period, so that the terminal obtains relevant system information and completes synchronization. This avoids the high power consumption caused by periodically transmitting SSBs with a small period (e.g., increasing the SSB period to reduce network-side power consumption), optimizes network-side energy saving, and to some extent avoids the problem of high terminal access latency caused by increased SSB periods. It effectively solves the problems of poor network-side energy saving or high initial terminal access latency in related synchronization information transmission schemes.

[0273] Specifically, transceiver 142 is used to receive and send data under the control of processor 143.

[0274] In Figure 14, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors represented by processor 143 and memory represented by memory 141. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. Transceiver 142 can be multiple elements, including transmitters and receivers, providing a unit for communicating with various other devices over a transmission medium, including wireless channels, wired channels, optical fibers, etc. For different user equipment, user interface 144 can also be an interface capable of connecting external or internal devices, including but not limited to keypads, displays, speakers, microphones, joysticks, etc.

[0275] Processor 143 is responsible for managing the bus architecture and general processing, while memory 141 can store data used by processor 143 when performing operations.

[0276] In some embodiments, the processor 143 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD), and the processor may also adopt a multi-core architecture.

[0277] The processor executes any of the methods described in the embodiments of this disclosure by invoking a computer program stored in memory, according to the obtained executable instructions. The processor and memory may also be physically separated.

[0278] Wherein, at least one of the first SSB set, the first PBCH set, the second SSB set, and the third SSB set is triggered by a first trigger signal sent by the terminal or by the network-side device; and / or, the synchronization information further includes at least one of the fourth SSB set and the second PBCH set triggered by a second trigger signal sent by the terminal or by the network-side device.

[0279] In this embodiment of the disclosure, at least one of the first SSB set, the first PBCH set, the second SSB set, the third SSB set, the fourth SSB set, and the second PBCH set is an on-demand transmission set.

[0280] In this embodiment of the disclosure, the first SSB set is periodically transmitted through a first period, and the first period is longer than the second period; or, the second SSB set is periodically transmitted through a third period, and the third period is longer than the fourth period; wherein, the second period is 20ms, and / or, the first period is 40ms, 80ms, 160ms, 320ms, 640ms, or 1280ms; or, the fourth period is 20ms, and / or, the third period is 40ms, 80ms, 160ms, 320ms, 640ms, or 1280ms.

[0281] In this embodiment of the disclosure, the first SSB set includes M1 SSBs, each SSB corresponding to a different SSB index number; M1 is 4, 8 or 64; or, the second SSB set includes M2×M3 SSBs, M2 is 4, 8 or 64, and M3 is an integer greater than 1.

[0282] The second SSB set is transmitted within M3 consecutive first time units; wherein the first time unit is a half frame, a subframe, or Q1 orthogonal frequency division multiplexing (OFDM) symbols, and Q1 is a positive integer.

[0283] In this embodiment of the disclosure, the first PBCH set is repeatedly transmitted during the transmission period of the first SSB set.

[0284] In this case, the set of SSB index numbers associated with PBCH in the first PBCH set is the same as the set of SSB index numbers in the first SSB set.

[0285] In this embodiment of the disclosure, the first SSB set is transmitted within a second time unit, and the first PBCH set is transmitted after the resources occupied by the first SSB set are used; wherein, the second time unit is a half frame, a subframe, or Q2 orthogonal frequency division multiplexing (OFDM) symbols, and Q2 is a positive integer.

[0286] The first PBCH set is transmitted after the resources occupied by the first SSB set, including: the first PBCH set is transmitted within a third time unit or within at least two consecutive third time units after the second time unit; wherein the third time unit is a half frame, a subframe, or Q3 orthogonal frequency division multiplexing (OFDM) symbols, and Q3 is a positive integer.

[0287] In this embodiment of the disclosure, each PBCH in the first PBCH set occupies 3 OFDM symbols, and the second OFDM symbol occupied by each PBCH carries the auxiliary synchronization signal SSS of the resource element RE occupying part of the resource element RE; or, each PBCH in the first PBCH set occupies 2 consecutive OFDM symbols.

[0288] In this case, at least one PBCH in the first PBCH set is demodulated by the demodulation reference signal DMRS and SSS, or by DMRS alone.

[0289] In this embodiment of the disclosure, the SSBs in the second SSB set are repeatedly sent through a first granularity, which includes at least a portion of the SSBs in the second SSB set.

[0290] Wherein, the first parameter of the SSB in the fourth SSB set is the same as the first parameter of the SSB in the first SSB set or the second SSB set; the first parameter includes at least one of the following: center frequency, subcarrier spacing, physical layer cell identification number, and transmit power; and / or, the second parameter of the PBCH in the second PBCH set is the same as the second parameter of the PBCH contained in the SSB in the first SSB set or the second SSB set; the second parameter includes at least one of the following: center frequency, subcarrier spacing, and transmit power.

[0291] In this embodiment of the disclosure, the fourth SSB set is a subset of the first SSB set or the second SSB set; and / or, the second PBCH set is a subset of the PBCHs contained in the SSBs of the first SSB set or the second SSB set; and / or, the fourth SSB set includes SSBs associated with the beam direction used by the second trigger signal; and / or, the second PBCH set includes PBCHs associated with the beam direction used by the second trigger signal.

[0292] The transmission of a fourth SSB set occupies a fourth time unit, and the fourth SSB set is transmitted at least twice within consecutive fourth time units; and / or, the transmission of a second PBCH set occupies a fifth time unit, and the second PBCH set is transmitted at least twice within consecutive fifth time units; wherein the fourth time unit is a half-frame, a subframe, or Q4 orthogonal frequency division multiplexing (OFDM) symbols, where Q4 is a positive integer; and / or, the fifth time unit is a half-frame, a subframe, or Q5 orthogonal frequency division multiplexing (OFDM) symbols, where Q5 is a positive integer.

[0293] In this embodiment of the disclosure, the starting transmission time of the first fourth SSB set is the start time of the K1th fourth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first second PBCH set is the start time of the K2th fifth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first fourth SSB set is within the interval from the K3th fourth time unit to the K3+L1-1th fourth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first second PBCH set is within the interval from the K4th fifth time unit to the K4+L2-1th fifth time unit after the terminal sends the second trigger signal. Within the time unit interval; and / or, the start transmission time of the first fourth SSB set is within the first sixth time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; and / or, the start transmission time of the first second PBCH set is within the first seventh time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; wherein, the sixth time unit is a half-frame, a subframe, or Q6 orthogonal frequency division multiplexing (OFDM) symbols, where Q6 is a positive integer; and / or, the seventh time unit is a half-frame, a subframe, or Q7 orthogonal frequency division multiplexing (OFDM) symbols, where Q7 is a positive integer.

[0294] The method of receiving synchronization information sent by the network-side device includes: listening to the interval from the K3th fourth time unit to the K3+L1-1th fourth time unit after the second trigger signal is sent, and receiving the fourth SSB set; and / or listening to the interval from the K4th fifth time unit to the K4+L2-1th fifth time unit after the second trigger signal is sent, and receiving the second PBCH set.

[0295] In this embodiment of the disclosure, the transmission of a first SSB set occupies an eighth time unit, and the first SSB set is transmitted at least twice within consecutive eighth time units; and / or, the transmission of a first PBCH set occupies a ninth time unit, and the first PBCH set is transmitted at least twice within consecutive ninth time units; and / or, the transmission of a second SSB set occupies a tenth time unit, and the second SSB set is transmitted at least twice within consecutive tenth time units; wherein, the eighth time unit is a half-frame, a subframe, or Q8 orthogonal frequency division multiplexing (OFDM) symbols, and Q8 is a positive integer; and / or, the ninth time unit is a half-frame, a subframe, or Q9 orthogonal frequency division multiplexing (OFDM) symbols, and Q9 is a positive integer; and / or, the tenth time unit is a half-frame, a subframe, or Q10 orthogonal frequency division multiplexing (OFDM) symbols, and Q10 is a positive integer.

[0296] Wherein, the starting transmission time of the first first SSB set is the start time of the K5th eighth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first first PBCH set is the start time of the K6th ninth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first second SSB set is the start time of the K7th tenth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first first SSB set is within the interval from the K8th eighth time unit to the K8+L3-1th eighth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first first PBCH set is within the interval from the K9th ninth time unit to the K9+L4-1th ninth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first second SSB set is within the interval from the K10th tenth time unit to the K10+L5-1th tenth time unit after the terminal sends the first trigger signal. Within the interval; and / or, the initial transmission time of the first first SSB set is within the first eleventh time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; and / or, the initial transmission time of the first first PBCH set is within the first twelfth time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; and / or, the initial transmission time of the first second SSB set is within the first thirteenth time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; wherein, the eleventh time unit is a half-frame, a subframe, or Q11 orthogonal frequency division multiplexing (OFDM) symbols, and Q11 is a positive integer; and / or, the twelfth time unit is a half-frame, a subframe, or Q12 orthogonal frequency division multiplexing (OFDM) symbols, and Q12 is a positive integer; and / or, the thirteenth time unit is a half-frame, a subframe, or Q13 orthogonal frequency division multiplexing (OFDM) symbols, and Q13 is a positive integer.

[0297] In this embodiment of the disclosure, receiving the synchronization information sent by the network-side device includes: monitoring the interval from the K8th eighth time unit to the K8+L3-1th eighth time unit after the first trigger signal is sent, and receiving the first SSB set; and / or, monitoring the interval from the K9th ninth time unit to the K9+L4-1th ninth time unit after the first trigger signal is sent, and receiving the first PBCH set; and / or, monitoring the interval from the K10th tenth time unit to the K10+L5-1th tenth time unit after the first trigger signal is sent, and receiving the second SSB set.

[0298] Furthermore, the operation also includes: sending a trigger signal to the network-side device through the transceiver; the trigger signal includes the first trigger signal and / or the second trigger signal.

[0299] It should be noted that the device provided in this embodiment can implement all the method steps implemented in the above terminal-side method embodiment and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0300] This disclosure also provides a synchronization information transmission device, applied to a network-side device, as shown in FIG15, including:

[0301] The first transmitting unit 151 is used to transmit synchronization information to the terminal; wherein, the synchronization information includes a first synchronization signal block (SSB) set and a first physical broadcast channel (PBCH) set;

[0302] Alternatively, the synchronization information includes a second SSB set, in which at least one SSB is repeatedly transmitted;

[0303] Alternatively, the synchronization information may include a third SSB set with a transmission period greater than 20ms, the third SSB set being used for the initial access of the terminal.

[0304] The synchronization information transmission device provided in this embodiment sends synchronization information to a terminal; wherein the synchronization information includes a first synchronization signal block (SSB) set and a first physical broadcast channel (PBCH) set; or, the synchronization information includes a second SSB set, at least one SSB in the second SSB set being repeatedly transmitted; or, the synchronization information includes a third SSB set with a transmission period greater than 20ms, the third SSB set being used for the initial access of the terminal; it can support the combination of the first SSB set and the first PBCH set, or the repeated transmission of SSBs in the second SSB set, or the transmission of a third SSB set with a long period, so that the terminal can obtain relevant system information and complete synchronization. It can avoid the high power consumption caused by periodically transmitting SSBs with a small period (e.g., increasing the SSB period to reduce network-side power consumption), optimize the network-side energy saving effect, and can also avoid the problem of high terminal access latency caused by increasing the SSB period to a certain extent. It effectively solves the problems of poor network-side energy saving effect or high initial terminal access latency in the synchronization information transmission schemes of related technologies.

[0305] Wherein, at least one of the first SSB set, the first PBCH set, the second SSB set, and the third SSB set is triggered by a first trigger signal sent by the terminal or by the network-side device; and / or, the synchronization information further includes at least one of the fourth SSB set and the second PBCH set triggered by a second trigger signal sent by the terminal or by the network-side device.

[0306] In this embodiment of the disclosure, at least one of the first SSB set, the first PBCH set, the second SSB set, the third SSB set, the fourth SSB set, and the second PBCH set is an on-demand transmission set.

[0307] In this embodiment of the disclosure, the first SSB set is periodically transmitted through a first period, and the first period is longer than the second period; or, the second SSB set is periodically transmitted through a third period, and the third period is longer than the fourth period; wherein, the second period is 20ms, and / or, the first period is 40ms, 80ms, 160ms, 320ms, 640ms, or 1280ms; or, the fourth period is 20ms, and / or, the third period is 40ms, 80ms, 160ms, 320ms, 640ms, or 1280ms.

[0308] In this embodiment of the disclosure, the first SSB set includes M1 SSBs, each SSB corresponding to a different SSB index number; M1 is 4, 8 or 64; or, the second SSB set includes M2×M3 SSBs, M2 is 4, 8 or 64, and M3 is an integer greater than 1.

[0309] The second SSB set is transmitted within M3 consecutive first time units; wherein the first time unit is a half frame, a subframe, or Q1 orthogonal frequency division multiplexing (OFDM) symbols, and Q1 is a positive integer.

[0310] In this embodiment of the disclosure, the first PBCH set is repeatedly transmitted during the transmission period of the first SSB set.

[0311] In this case, the set of SSB index numbers associated with PBCH in the first PBCH set is the same as the set of SSB index numbers in the first SSB set.

[0312] In this embodiment of the disclosure, the first SSB set is transmitted within a second time unit, and the first PBCH set is transmitted after the resources occupied by the first SSB set are used; wherein, the second time unit is a half frame, a subframe, or Q2 orthogonal frequency division multiplexing (OFDM) symbols, and Q2 is a positive integer.

[0313] The first PBCH set is transmitted after the resources occupied by the first SSB set, including: the first PBCH set is transmitted within a third time unit or within at least two consecutive third time units after the second time unit; wherein the third time unit is a half frame, a subframe, or Q3 orthogonal frequency division multiplexing (OFDM) symbols, and Q3 is a positive integer.

[0314] In this embodiment of the disclosure, each PBCH in the first PBCH set occupies 3 OFDM symbols, and the second OFDM symbol occupied by each PBCH carries the auxiliary synchronization signal SSS of the resource element RE occupying part of the resource element RE; or, each PBCH in the first PBCH set occupies 2 consecutive OFDM symbols.

[0315] In this case, at least one PBCH in the first PBCH set is demodulated by the demodulation reference signal DMRS and SSS, or by DMRS alone.

[0316] In this embodiment of the disclosure, the SSBs in the second SSB set are repeatedly sent through a first granularity, which includes at least a portion of the SSBs in the second SSB set.

[0317] Wherein, the first parameter of the SSB in the fourth SSB set is the same as the first parameter of the SSB in the first SSB set or the second SSB set; the first parameter includes at least one of the following: center frequency, subcarrier spacing, physical layer cell identification number, and transmit power; and / or, the second parameter of the PBCH in the second PBCH set is the same as the second parameter of the PBCH contained in the SSB in the first SSB set or the second SSB set; the second parameter includes at least one of the following: center frequency, subcarrier spacing, and transmit power.

[0318] In this embodiment of the disclosure, the fourth SSB set is a subset of the first SSB set or the second SSB set; and / or, the second PBCH set is a subset of the PBCHs contained in the SSBs of the first SSB set or the second SSB set; and / or, the fourth SSB set includes SSBs associated with the beam direction used by the second trigger signal; and / or, the second PBCH set includes PBCHs associated with the beam direction used by the second trigger signal.

[0319] The transmission of a fourth SSB set occupies a fourth time unit, and the fourth SSB set is transmitted at least twice within consecutive fourth time units; and / or, the transmission of a second PBCH set occupies a fifth time unit, and the second PBCH set is transmitted at least twice within consecutive fifth time units; wherein the fourth time unit is a half-frame, a subframe, or Q4 orthogonal frequency division multiplexing (OFDM) symbols, where Q4 is a positive integer; and / or, the fifth time unit is a half-frame, a subframe, or Q5 orthogonal frequency division multiplexing (OFDM) symbols, where Q5 is a positive integer.

[0320] In this embodiment of the disclosure, the starting transmission time of the first fourth SSB set is the start time of the K1th fourth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first second PBCH set is the start time of the K2th fifth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first fourth SSB set is within the interval from the K3th fourth time unit to the K3+L1-1th fourth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first second PBCH set is within the interval from the K4th fifth time unit to the K4+L2-1th fifth time unit after the terminal sends the second trigger signal. Within the time unit interval; and / or, the start transmission time of the first fourth SSB set is within the first sixth time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; and / or, the start transmission time of the first second PBCH set is within the first seventh time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; wherein, the sixth time unit is a half-frame, a subframe, or Q6 orthogonal frequency division multiplexing (OFDM) symbols, where Q6 is a positive integer; and / or, the seventh time unit is a half-frame, a subframe, or Q7 orthogonal frequency division multiplexing (OFDM) symbols, where Q7 is a positive integer.

[0321] The transmission of a first SSB set occupies an eighth time unit, and the first SSB set is transmitted at least twice within consecutive eighth time units; and / or, the transmission of a first PBCH set occupies a ninth time unit, and the first PBCH set is transmitted at least twice within consecutive ninth time units; and / or, the transmission of a second SSB set occupies a tenth time unit, and the second SSB set is transmitted at least twice within consecutive tenth time units; wherein the eighth time unit is a half-frame, a subframe, or Q8 orthogonal frequency division multiplexing (OFDM) symbols, where Q8 is a positive integer; and / or, the ninth time unit is a half-frame, a subframe, or Q9 orthogonal frequency division multiplexing (OFDM) symbols, where Q9 is a positive integer; and / or, the tenth time unit is a half-frame, a subframe, or Q10 orthogonal frequency division multiplexing (OFDM) symbols, where Q10 is a positive integer.

[0322] In this embodiment of the disclosure, the starting transmission time of the first first SSB set is the start time of the K5th eighth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first first PBCH set is the start time of the K6th ninth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first second SSB set is the start time of the K7th tenth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first first SSB set is within the interval from the K8th eighth time unit to the K8+L3-1th eighth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first first PBCH set is within the interval from the K9th ninth time unit to the K9+L4-1th ninth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first second SSB set is within the interval from the K10th tenth time unit to the K10+L5-1th tenth time unit after the terminal sends the first trigger signal. Within the interval of the first SSB set; and / or, the start transmission time of the first SSB set is within the first eleventh time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; and / or, the start transmission time of the first PBCH set is within the first twelfth time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; and / or, the start transmission time of the first SSB set is within the first thirteenth time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; wherein, the eleventh time unit is a half-frame, a subframe, or Q11 orthogonal frequency division multiplexing (OFDM) symbols, and Q11 is a positive integer; and / or, the twelfth time unit is a half-frame, a subframe, or Q12 orthogonal frequency division multiplexing (OFDM) symbols, and Q12 is a positive integer; and / or, the thirteenth time unit is a half-frame, a subframe, or Q13 orthogonal frequency division multiplexing (OFDM) symbols, and Q13 is a positive integer.

[0323] Furthermore, the synchronization information transmission device further includes: a first receiving unit, configured to receive a trigger signal sent by the terminal; the trigger signal includes a first trigger signal and / or a second trigger signal; a first determining unit, configured to determine, based on the first trigger signal, whether to send at least one of the first SSB set, the first PBCH set, the second SSB set, and the third SSB set; and / or, based on the second trigger signal, whether to send at least one of the fourth SSB set and the second PBCH set; wherein, sending synchronization information to the terminal includes: if sending is determined based on the first trigger signal, sending at least one of the first SSB set, the first PBCH set, the second SSB set, and the third SSB set to the terminal; and / or, if sending is determined based on the second trigger signal, sending at least one of the fourth SSB set and the second PBCH set to the terminal.

[0324] It should be noted that the apparatus provided in this embodiment can implement all the method steps implemented in the above network-side device-side method embodiment and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0325] This disclosure also provides a synchronous information transmission device applied to a terminal, as shown in FIG16, including:

[0326] The second receiving unit 161 is used to receive synchronization information sent by the network-side device; wherein the synchronization information includes a first synchronization signal block (SSB) set and a first physical broadcast channel (PBCH) set; or, the synchronization information includes a second SSB set, wherein at least one SSB in the second SSB set is repeatedly transmitted; or, the synchronization information includes a third SSB set with a transmission period greater than 20ms, wherein the third SSB set is used for the initial access of the terminal.

[0327] The first processing unit 162 is used to obtain broadcast messages based on the synchronization information.

[0328] The synchronization information transmission device provided in this embodiment receives synchronization information sent by a network-side device. The synchronization information includes a first set of Synchronization Signal Blocks (SSBs) and a first set of Physical Broadcast Channels (PBCHs). Alternatively, the synchronization information includes a second set of SSBs, where at least one SSB in the second set is repeatedly transmitted. Or, the synchronization information includes a third set of SSBs with a transmission period greater than 20ms, used for initial terminal access. Based on the synchronization information, a broadcast message is obtained. This device supports combining the first SSB set with the first PBCH set, repeatedly transmitting SSBs from the second SSB set, or transmitting a third SSB set with a long period, so that the terminal obtains relevant system information and completes synchronization. This avoids the high power consumption caused by periodically transmitting SSBs with a small period (e.g., increasing the SSB period to reduce network-side power consumption), optimizes network-side energy saving, and to some extent avoids the problem of high terminal access latency caused by increased SSB periods. It effectively solves the problems of poor network-side energy saving or high initial terminal access latency in related technologies' synchronization information transmission schemes.

[0329] Wherein, at least one of the first SSB set, the first PBCH set, the second SSB set, and the third SSB set is triggered by a first trigger signal sent by the terminal or by the network-side device; and / or, the synchronization information further includes at least one of the fourth SSB set and the second PBCH set triggered by a second trigger signal sent by the terminal or by the network-side device.

[0330] In this embodiment of the disclosure, at least one of the first SSB set, the first PBCH set, the second SSB set, the third SSB set, the fourth SSB set, and the second PBCH set is an on-demand transmission set.

[0331] In this embodiment of the disclosure, the first SSB set is periodically transmitted through a first period, and the first period is longer than the second period; or, the second SSB set is periodically transmitted through a third period, and the third period is longer than the fourth period; wherein, the second period is 20ms, and / or, the first period is 40ms, 80ms, 160ms, 320ms, 640ms, or 1280ms; or, the fourth period is 20ms, and / or, the third period is 40ms, 80ms, 160ms, 320ms, 640ms, or 1280ms.

[0332] In this embodiment of the disclosure, the first SSB set includes M1 SSBs, each SSB corresponding to a different SSB index number; M1 is 4, 8 or 64; or, the second SSB set includes M2×M3 SSBs, M2 is 4, 8 or 64, and M3 is an integer greater than 1.

[0333] The second SSB set is transmitted within M3 consecutive first time units; wherein the first time unit is a half frame, a subframe, or Q1 orthogonal frequency division multiplexing (OFDM) symbols, and Q1 is a positive integer.

[0334] In this embodiment of the disclosure, the first PBCH set is repeatedly sent within the sending period of the first SSB set.

[0335] In this case, the set of SSB index numbers associated with PBCH in the first PBCH set is the same as the set of SSB index numbers in the first SSB set.

[0336] In this embodiment of the disclosure, the first SSB set is transmitted within a second time unit, and the first PBCH set is transmitted after the resources occupied by the first SSB set are used; wherein, the second time unit is a half frame, a subframe, or Q2 orthogonal frequency division multiplexing (OFDM) symbols, and Q2 is a positive integer.

[0337] The first PBCH set is transmitted after the resources occupied by the first SSB set, including: the first PBCH set is transmitted within a third time unit or within at least two consecutive third time units after the second time unit; wherein the third time unit is a half frame, a subframe, or Q3 orthogonal frequency division multiplexing (OFDM) symbols, and Q3 is a positive integer.

[0338] In this embodiment of the disclosure, each PBCH in the first PBCH set occupies 3 OFDM symbols, and the second OFDM symbol occupied by each PBCH carries the auxiliary synchronization signal SSS of the resource element RE occupying part of the resource element RE; or, each PBCH in the first PBCH set occupies 2 consecutive OFDM symbols.

[0339] In this case, at least one PBCH in the first PBCH set is demodulated by the demodulation reference signal DMRS and SSS, or by DMRS alone.

[0340] In this embodiment of the disclosure, the SSBs in the second SSB set are repeatedly sent through a first granularity, which includes at least a portion of the SSBs in the second SSB set.

[0341] Wherein, the first parameter of the SSB in the fourth SSB set is the same as the first parameter of the SSB in the first SSB set or the second SSB set; the first parameter includes at least one of the following: center frequency, subcarrier spacing, physical layer cell identification number, and transmit power; and / or, the second parameter of the PBCH in the second PBCH set is the same as the second parameter of the PBCH contained in the SSB in the first SSB set or the second SSB set; the second parameter includes at least one of the following: center frequency, subcarrier spacing, and transmit power.

[0342] In this embodiment of the disclosure, the fourth SSB set is a subset of the first SSB set or the second SSB set; and / or, the second PBCH set is a subset of the PBCHs contained in the SSBs of the first SSB set or the second SSB set; and / or, the fourth SSB set includes SSBs associated with the beam direction used by the second trigger signal; and / or, the second PBCH set includes PBCHs associated with the beam direction used by the second trigger signal.

[0343] The transmission of a fourth SSB set occupies a fourth time unit, and the fourth SSB set is transmitted at least twice within consecutive fourth time units; and / or, the transmission of a second PBCH set occupies a fifth time unit, and the second PBCH set is transmitted at least twice within consecutive fifth time units; wherein the fourth time unit is a half-frame, a subframe, or Q4 orthogonal frequency division multiplexing (OFDM) symbols, where Q4 is a positive integer; and / or, the fifth time unit is a half-frame, a subframe, or Q5 orthogonal frequency division multiplexing (OFDM) symbols, where Q5 is a positive integer.

[0344] In this embodiment of the disclosure, the starting transmission time of the first fourth SSB set is the start time of the K1th fourth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first second PBCH set is the start time of the K2th fifth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first fourth SSB set is within the interval from the K3th fourth time unit to the K3+L1-1th fourth time unit after the terminal sends the second trigger signal; and / or, the starting transmission time of the first second PBCH set is within the interval from the K4th fifth time unit to the K4+L2-1th fifth time unit after the terminal sends the second trigger signal. Within the time unit interval; and / or, the start transmission time of the first fourth SSB set is within the first sixth time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; and / or, the start transmission time of the first second PBCH set is within the first seventh time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; wherein, the sixth time unit is a half-frame, a subframe, or Q6 orthogonal frequency division multiplexing (OFDM) symbols, where Q6 is a positive integer; and / or, the seventh time unit is a half-frame, a subframe, or Q7 orthogonal frequency division multiplexing (OFDM) symbols, where Q7 is a positive integer.

[0345] The method of receiving synchronization information sent by the network-side device includes: listening to the interval from the K3th fourth time unit to the K3+L1-1th fourth time unit after the second trigger signal is sent, and receiving the fourth SSB set; and / or listening to the interval from the K4th fifth time unit to the K4+L2-1th fifth time unit after the second trigger signal is sent, and receiving the second PBCH set.

[0346] In this embodiment of the disclosure, the transmission of a first SSB set occupies an eighth time unit, and the first SSB set is transmitted at least twice within consecutive eighth time units; and / or, the transmission of a first PBCH set occupies a ninth time unit, and the first PBCH set is transmitted at least twice within consecutive ninth time units; and / or, the transmission of a second SSB set occupies a tenth time unit, and the second SSB set is transmitted at least twice within consecutive tenth time units; wherein, the eighth time unit is a half-frame, a subframe, or Q8 orthogonal frequency division multiplexing (OFDM) symbols, and Q8 is a positive integer; and / or, the ninth time unit is a half-frame, a subframe, or Q9 orthogonal frequency division multiplexing (OFDM) symbols, and Q9 is a positive integer; and / or, the tenth time unit is a half-frame, a subframe, or Q10 orthogonal frequency division multiplexing (OFDM) symbols, and Q10 is a positive integer.

[0347] Wherein, the starting transmission time of the first first SSB set is the start time of the K5th eighth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first first PBCH set is the start time of the K6th ninth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first second SSB set is the start time of the K7th tenth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first first SSB set is within the interval from the K8th eighth time unit to the K8+L3-1th eighth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first first PBCH set is within the interval from the K9th ninth time unit to the K9+L4-1th ninth time unit after the terminal sends the first trigger signal; and / or, the starting transmission time of the first second SSB set is within the interval from the K10th tenth time unit to the K10+L5-1th tenth time unit after the terminal sends the first trigger signal. Within the interval; and / or, the initial transmission time of the first first SSB set is within the first eleventh time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; and / or, the initial transmission time of the first first PBCH set is within the first twelfth time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; and / or, the initial transmission time of the first second SSB set is within the first thirteenth time unit after the network-side device processing time requirement is met, the network-side device processing time requirement being predefined; wherein, the eleventh time unit is a half-frame, a subframe, or Q11 orthogonal frequency division multiplexing (OFDM) symbols, and Q11 is a positive integer; and / or, the twelfth time unit is a half-frame, a subframe, or Q12 orthogonal frequency division multiplexing (OFDM) symbols, and Q12 is a positive integer; and / or, the thirteenth time unit is a half-frame, a subframe, or Q13 orthogonal frequency division multiplexing (OFDM) symbols, and Q13 is a positive integer.

[0348] In this embodiment of the disclosure, receiving the synchronization information sent by the network-side device includes: monitoring the interval from the K8th eighth time unit to the K8+L3-1th eighth time unit after the first trigger signal is sent, and receiving the first SSB set; and / or, monitoring the interval from the K9th ninth time unit to the K9+L4-1th ninth time unit after the first trigger signal is sent, and receiving the first PBCH set; and / or, monitoring the interval from the K10th tenth time unit to the K10+L5-1th tenth time unit after the first trigger signal is sent, and receiving the second SSB set.

[0349] Furthermore, the synchronous information transmission device further includes: a second sending unit, used to send a trigger signal to the network-side device; the trigger signal includes the first trigger signal and / or the second trigger signal.

[0350] It should be noted that the apparatus provided in this embodiment can implement all the method steps implemented in the above terminal-side method embodiment and achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0351] It should be noted that the division of units in the embodiments of this disclosure is illustrative and only represents one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of this disclosure can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or as software functional units.

[0352] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to related technologies, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this disclosure. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0353] This disclosure also provides a non-transient readable storage medium storing a program for causing a processor to execute the above-described network-side device-side or terminal-side synchronization information transmission method.

[0354] The non-transiently readable storage medium can be any available medium or data storage device that the processor can access, including but not limited to magnetic memory (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO)), optical memory (e.g., compact disc (CD), digital video disc (DVD), Blu-ray disc (BD), high-definition versatile disc (HVD)), and semiconductor memory (e.g., ROM, erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), non-volatile memory (NAND (Non-volatile Memory Device) FLASH), solid state hard disk (SSD)).

[0355] The implementation embodiments of the above-mentioned synchronous information transmission methods on the network-side device side or terminal side are all applicable to the embodiments of the non-instantaneously readable storage medium and can achieve the same technical effect.

[0356] Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, systems, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0357] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in one or more flowchart illustrations and / or one or more block diagrams.

[0358] These processor-executable instructions may also be stored in a processor-readable memory that can instruct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means that implement the functions specified in one or more flowcharts and / or one or more block diagrams.

[0359] These processor-executable instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the functions specified in one or more flowcharts and / or one or more block diagrams.

[0360] Furthermore, it should be noted that in the apparatus and method of this disclosure, it is obvious that the components or steps can be decomposed and / or recombined. These decompositions and / or recombinations should be considered equivalent solutions of this disclosure. Moreover, the steps performing the above series of processes can naturally be executed in the order described, but are not necessarily required to be executed in chronological order; some steps can be executed in parallel or independently of each other. Those skilled in the art will understand that all or any step or component of the method and apparatus of this disclosure can be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or a combination thereof, which can be achieved by those skilled in the art using their basic programming skills after reading the description of this disclosure.

[0361] It should be noted that the above division of modules is merely a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, these modules can be implemented entirely in software via processing element calls; they can be fully implemented in hardware; or some modules can be implemented by processing element calls to software, while others are implemented in hardware. For example, a module can be a separate processing element, or it can be integrated into a chip in the aforementioned device. Alternatively, it can be stored as program code in the memory of the aforementioned device, and its function can be called and executed by a processing element of the device. The implementation of other modules is similar. Moreover, these modules can be fully or partially integrated together, or they can be implemented independently. The processing element mentioned here can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules can be completed through integrated logic circuits in the hardware of the processor element or through software instructions.

[0362] For example, each module, unit, subunit, or submodule can be one or more integrated circuits configured to implement the above methods, such as one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), or one or more field-programmable gate arrays (FPGAs). As another example, when a module is implemented using processing element scheduler code, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processor capable of calling program code. Furthermore, these modules can be integrated together to implement a system-on-a-chip (SOC).

[0363] The terms “first,” “second,” etc., used in this disclosure and in the claims are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this disclosure described herein may be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. Additionally, the use of “and / or” in the specification and claims indicates at least one of the connected objects, such as A and / or B and / or C, indicating seven possibilities: A alone, B alone, C alone, and both A and B, both B and C, both A and C, and A, B, and C. Similarly, the use of “at least one of A and B” in this specification and claims should be understood as “A alone, B alone, or both A and B.”

[0364] Obviously, those skilled in the art can make various modifications and variations to this disclosure without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims of this disclosure and their equivalents, this disclosure is also intended to include such modifications and variations.

Claims

1. A synchronization information transmission method, applied to a network-side device, the synchronization information transmission method comprising: Send synchronization information to the terminal; wherein, the synchronization information includes a first set of synchronization signal blocks (SSBs) and a first set of physical broadcast channels (PBCHs); Alternatively, the synchronization information includes a second SSB set, in which at least one SSB is repeatedly transmitted; Alternatively, the synchronization information may include a third SSB set with a transmission period greater than 20ms, the third SSB set being used for the initial access of the terminal.

2. The synchronous information transmission method according to claim 1, wherein, At least one of the first SSB set, the first PBCH set, the second SSB set, and the third SSB set is triggered by a first trigger signal sent by the terminal or by the network-side device; And / or, the synchronization information further includes at least one of a fourth SSB set and a second PBCH set triggered by a second trigger signal sent by the terminal or triggered by the network-side device.

3. The synchronous information transmission method according to claim 2, wherein, At least one of the first SSB set, the first PBCH set, the second SSB set, the third SSB set, the fourth SSB set, and the second PBCH set is an on-demand transmission set.

4. The synchronous information transmission method according to claim 1 or 2, wherein, The first SSB set is periodically transmitted over a first period, and the first period is longer than the second period; Alternatively, the second SSB set may be periodically transmitted through a third period, and the third period may be longer than the fourth period. Wherein, the second period is 20ms, and / or, the first period is 40ms, 80ms, 160ms, 320ms, 640ms or 1280ms; Alternatively, the fourth period may be 20ms, and / or the third period may be 40ms, 80ms, 160ms, 320ms, 640ms, or 1280ms.

5. The synchronous information transmission method according to claim 1, wherein, The first SSB set includes M1 SSBs, each SSB corresponding to a different SSB index number; M1 is 4, 8 or 64. Alternatively, the second SSB set may include M2×M3 SSBs, where M2 is 4, 8, or 64, and M3 is an integer greater than 1.

6. The synchronous information transmission method according to claim 5, wherein, The second SSB set is transmitted within M3 consecutive first time units; The first time unit is a half-frame, a sub-frame, or Q1 orthogonal frequency division multiplexing (OFDM) symbols, where Q1 is a positive integer.

7. The synchronous information transmission method according to claim 1, wherein, The first PBCH set is repeatedly transmitted during the transmission period of the first SSB set.

8. The synchronous information transmission method according to claim 1, wherein, The set of SSB index numbers associated with PBCH in the first PBCH set is the same as the set of SSB index numbers in the first SSB set.

9. The synchronous information transmission method according to claim 1, wherein, The first SSB set is sent within the second time unit, and the first PBCH set is sent after the resources occupied by the first SSB set are used. The second time unit is a half-frame, a subframe, or Q2 orthogonal frequency division multiplexing (OFDM) symbols, where Q2 is a positive integer.

10. The synchronous information transmission method according to claim 9, wherein, The first PBCH set is transmitted after the resources occupied by the first SSB set, including: the first PBCH set is transmitted within a third time unit or within at least two consecutive third time units after the second time unit; wherein, the third time unit is a half frame, a subframe or Q3 orthogonal frequency division multiplexing (OFDM) symbols, and Q3 is a positive integer.

11. The synchronous information transmission method according to claim 1, wherein, Each PBCH in the first PBCH set occupies 3 OFDM symbols, and the second OFDM symbol occupied by each PBCH carries the auxiliary synchronization signal SSS of the resource element RE occupying part of the resource element RE. Alternatively, each PBCH in the first PBCH set may occupy two consecutive OFDM symbols.

12. The synchronous information transmission method according to claim 1, wherein, At least one PBCH in the first PBCH set is demodulated by the demodulation reference signal DMRS and SSS, or by DMRS alone.

13. The synchronous information transmission method according to claim 1, wherein, The SSBs in the second SSB set are repeatedly sent through a first granularity, which includes at least a portion of the SSBs in the second SSB set.

14. The synchronous information transmission method according to claim 2, wherein, The first parameter of the SSB in the fourth SSB set is the same as the first parameter of the SSB in the first SSB set or the second SSB set; the first parameter includes at least one of the following: center frequency, subcarrier spacing, physical layer cell identification number, and transmission power. And / or, the second parameter of the PBCH in the second PBCH set is the same as the second parameter of the PBCH contained in the SSB in the first SSB set or the second SSB set; the second parameter includes at least one of the following: center frequency, subcarrier spacing and transmission power.

15. The synchronous information transmission method according to claim 2, wherein, The fourth SSB set is a subset of the first SSB set or the second SSB set; And / or, the second PBCH set is a subset of the PBCHs contained in the SSBs of the first SSB set or the second SSB set; And / or, the fourth set of SSBs includes SSBs associated with the beam direction used by the second trigger signal; And / or, the second PBCH set includes PBCHs associated with the beam direction used by the second trigger signal.

16. The synchronous information transmission method according to claim 2, wherein, The transmission of a fourth SSB set occupies a fourth time unit, and the fourth SSB set is transmitted at least twice and within consecutive fourth time units; And / or, the transmission of a second PBCH set occupies a fifth time unit, and the second PBCH set is transmitted at least twice and within consecutive fifth time units; Wherein, the fourth time unit is a half frame, a subframe, or Q4 orthogonal frequency division multiplexing (OFDM) symbols, where Q4 is a positive integer; and / or, the fifth time unit is a half frame, a subframe, or Q5 orthogonal frequency division multiplexing (OFDM) symbols, where Q5 is a positive integer.

17. The synchronous information transmission method according to claim 2 or 16, wherein, The starting transmission time of the first fourth SSB set is the start time of the K1th fourth time unit after the terminal sends the second trigger signal; And / or, the start time of the first second PBCH set is the start time of the K2th fifth time unit after the terminal sends the second trigger signal; And / or, the starting transmission time of the first fourth SSB set is within the interval from the K3th fourth time unit to the K3+L1-1th fourth time unit after the terminal sends the second trigger signal; And / or, the start time of the first second PBCH set is within the interval from the K4th fifth time unit to the K4+L2-1th fifth time unit after the terminal sends the second trigger signal; And / or, the initial transmission time of the first fourth SSB set is within the first sixth time unit after the network-side device processing time requirement is met, which is predefined; And / or, the start time of the first second PBCH set is within the first seventh time unit after the network-side device processing time requirement is met, which is predefined; Wherein, the sixth time unit is a half-frame, a subframe, or Q6 orthogonal frequency division multiplexing (OFDM) symbols, where Q6 is a positive integer; and / or, the seventh time unit is a half-frame, a subframe, or Q7 orthogonal frequency division multiplexing (OFDM) symbols, where Q7 is a positive integer.

18. The synchronous information transmission method according to claim 2, wherein, The transmission of one of the first SSB sets occupies one eighth time unit, and the first SSB set is transmitted at least twice and within consecutive eighth time units; And / or, the transmission of one of the first PBCH sets occupies a ninth time unit, and the first PBCH set is transmitted at least twice and within consecutive ninth time units; And / or, the transmission of one of the second SSB sets occupies a tenth time unit, and the second SSB set is transmitted at least twice and within consecutive tenth time units; Wherein, the eighth time unit is a half-frame, a subframe, or Q8 orthogonal frequency division multiplexing (OFDM) symbols, where Q8 is a positive integer; and / or, the ninth time unit is a half-frame, a subframe, or Q9 orthogonal frequency division multiplexing (OFDM) symbols, where Q9 is a positive integer; and / or, the tenth time unit is a half-frame, a subframe, or Q10 orthogonal frequency division multiplexing (OFDM) symbols, where Q10 is a positive integer.

19. The synchronous information transmission method according to claim 2 or 18, wherein, The starting transmission time of the first SSB set is the start time of the K5th eighth time unit after the terminal sends the first trigger signal; And / or, the start time of the first PBCH set is the start time of the K6th ninth time unit after the terminal sends the first trigger signal; And / or, the start time of the first second SSB set is the start time of the K7th tenth time unit after the terminal sends the first trigger signal; And / or, the initial transmission time of the first first SSB set is within the interval from the K8th eighth time unit to the K8+L3-1th eighth time unit after the terminal sends the first trigger signal; And / or, the start time of the first PBCH set is within the interval from the K9th ninth time unit to the K9+L4-1th ninth time unit after the terminal sends the first trigger signal; And / or, the start time of the first second SSB set is within the interval from the K10th tenth time unit to the K10+L5-1th tenth time unit after the terminal sends the first trigger signal; And / or, the initial transmission time of the first first SSB set is within the first eleventh time unit after the network-side device processing time requirement is met, which is predefined; And / or, the start time of the first PBCH set is within the first twelfth time unit after the network-side device processing time requirement is met, which is predefined; And / or, the initial transmission time of the first second SSB set is within the first thirteenth time unit after the network-side device processing time requirement is met, which is predefined; Wherein, the eleventh time unit is a half-frame, a subframe, or Q11 orthogonal frequency division multiplexing (OFDM) symbols, where Q11 is a positive integer; and / or, the twelfth time unit is a half-frame, a subframe, or Q12 orthogonal frequency division multiplexing (OFDM) symbols, where Q12 is a positive integer; and / or, the thirteenth time unit is a half-frame, a subframe, or Q13 orthogonal frequency division multiplexing (OFDM) symbols, where Q13 is a positive integer.

20. The synchronous information transmission method according to claim 2, wherein, Also includes: Receive the trigger signal sent by the terminal; The trigger signal includes the first trigger signal and / or the second trigger signal; Based on the first trigger signal, determine whether to send at least one of the first SSB set, the first PBCH set, the second SSB set, and the third SSB set; And / or, based on the second trigger signal, determine whether to send at least one of the fourth SSB set and the second PBCH set; The step of sending synchronization information to the terminal includes: If transmission is determined based on the first trigger signal, at least one of the first SSB set, the first PBCH set, the second SSB set, and the third SSB set is sent to the terminal; and / or, if transmission is determined based on the second trigger signal, at least one of the fourth SSB set and the second PBCH set is sent to the terminal.

21. A method for transmitting synchronous information, applied to a terminal, the method comprising: The device receives synchronization information sent by a network-side device; wherein the synchronization information includes a first set of synchronization signal blocks (SSBs) and a first set of physical broadcast channels (PBCHs); or, the synchronization information includes a second set of SSBs, wherein at least one SSB in the second set of SSBs is repeatedly transmitted; or, the synchronization information includes a third set of SSBs with a transmission period greater than 20ms, wherein the third set of SSBs is used for the initial access of the terminal. Based on the synchronization information, a broadcast message is obtained.

22. The synchronous information transmission method according to claim 21, wherein, At least one of the first SSB set, the first PBCH set, the second SSB set, and the third SSB set is triggered by a first trigger signal sent by the terminal or by the network-side device; And / or, the synchronization information further includes at least one of a fourth SSB set and a second PBCH set triggered by a second trigger signal sent by the terminal or triggered by the network-side device.

23. The synchronous information transmission method according to claim 22, wherein, At least one of the first SSB set, the first PBCH set, the second SSB set, the third SSB set, the fourth SSB set, and the second PBCH set is an on-demand transmission set.

24. The synchronous information transmission method according to claim 21 or 22, wherein, The first SSB set is periodically transmitted over a first period, and the first period is longer than the second period; Alternatively, the second SSB set may be periodically transmitted through a third period, and the third period may be longer than the fourth period. Wherein, the second period is 20ms, and / or, the first period is 40ms, 80ms, 160ms, 320ms, 640ms or 1280ms; Alternatively, the fourth period may be 20ms, and / or the third period may be 40ms, 80ms, 160ms, 320ms, 640ms, or 1280ms.

25. The synchronous information transmission method according to claim 21, wherein, The first SSB set includes M1 SSBs, each SSB corresponding to a different SSB index number; M1 is 4, 8 or 64. Alternatively, the second SSB set may include M2×M3 SSBs, where M2 is 4, 8, or 64, and M3 is an integer greater than 1.

26. The synchronous information transmission method according to claim 25, wherein, The second SSB set is transmitted within M3 consecutive first time units; The first time unit is a half-frame, a sub-frame, or Q1 orthogonal frequency division multiplexing (OFDM) symbols, where Q1 is a positive integer.

27. The synchronous information transmission method according to claim 21, wherein, The first PBCH set is repeatedly transmitted during the transmission period of the first SSB set.

28. The synchronous information transmission method according to claim 21, wherein, The set of SSB index numbers associated with PBCH in the first PBCH set is the same as the set of SSB index numbers in the first SSB set.

29. The synchronous information transmission method according to claim 21, wherein, The first SSB set is sent within the second time unit, and the first PBCH set is sent after the resources occupied by the first SSB set are used. The second time unit is a half-frame, a subframe, or Q2 orthogonal frequency division multiplexing (OFDM) symbols, where Q2 is a positive integer.

30. The synchronous information transmission method according to claim 29, wherein, The first PBCH set is transmitted after the resources occupied by the first SSB set, including: the first PBCH set is transmitted within a third time unit or within at least two consecutive third time units after the second time unit; wherein, the third time unit is a half frame, a subframe or Q3 orthogonal frequency division multiplexing OFDM symbols, and Q3 is a positive integer.

31. The synchronous information transmission method according to claim 21, wherein, Each PBCH in the first PBCH set occupies 3 OFDM symbols, and the second OFDM symbol occupied by each PBCH carries the auxiliary synchronization signal SSS of the resource element RE occupying part of the resource element RE. Alternatively, each PBCH in the first PBCH set may occupy two consecutive OFDM symbols.

32. The synchronous information transmission method according to claim 21, wherein, At least one PBCH in the first PBCH set is demodulated by the demodulation reference signal DMRS and SSS, or by DMRS alone.

33. The synchronous information transmission method according to claim 21, wherein, The SSBs in the second SSB set are repeatedly sent through a first granularity, which includes at least a portion of the SSBs in the second SSB set.

34. The synchronous information transmission method according to claim 22, wherein, The first parameter of the SSB in the fourth SSB set is the same as the first parameter of the SSB in the first SSB set or the second SSB set; the first parameter includes at least one of the following: center frequency, subcarrier spacing, physical layer cell identification number, and transmission power. And / or, the second parameter of the PBCH in the second PBCH set is the same as the second parameter of the PBCH contained in the SSB in the first SSB set or the second SSB set; the second parameter includes at least one of the following: center frequency, subcarrier spacing and transmission power.

35. The synchronous information transmission method according to claim 22, wherein, The fourth SSB set is a subset of the first SSB set or the second SSB set; And / or, the second PBCH set is a subset of the PBCHs contained in the SSBs of the first SSB set or the second SSB set; And / or, the fourth set of SSBs includes SSBs associated with the beam direction used by the second trigger signal; And / or, the second PBCH set includes PBCHs associated with the beam direction used by the second trigger signal.

36. The synchronous information transmission method according to claim 22, wherein, The transmission of one of the fourth SSB sets occupies a fourth time unit, and the fourth SSB set is transmitted at least twice and within consecutive fourth time units; And / or, the transmission of one of the second PBCH sets occupies a fifth time unit, and the second PBCH set is transmitted at least twice and within consecutive fifth time units; Wherein, the fourth time unit is a half frame, a subframe, or Q4 orthogonal frequency division multiplexing (OFDM) symbols, where Q4 is a positive integer; and / or, the fifth time unit is a half frame, a subframe, or Q5 orthogonal frequency division multiplexing (OFDM) symbols, where Q5 is a positive integer.

37. The synchronous information transmission method according to claim 22 or 36, wherein, The starting transmission time of the first fourth SSB set is the start time of the K1th fourth time unit after the terminal sends the second trigger signal; And / or, the start time of the first second PBCH set is the start time of the K2th fifth time unit after the terminal sends the second trigger signal; And / or, the starting transmission time of the first fourth SSB set is within the interval from the K3th fourth time unit to the K3+L1-1th fourth time unit after the terminal sends the second trigger signal; And / or, the start time of the first second PBCH set is within the interval from the K4th fifth time unit to the K4+L2-1th fifth time unit after the terminal sends the second trigger signal; And / or, the initial transmission time of the first fourth SSB set is within the first sixth time unit after the network-side device processing time requirement is met, which is predefined; And / or, the start time of the first second PBCH set is within the first seventh time unit after the network-side device processing time requirement is met, which is predefined; Wherein, the sixth time unit is a half-frame, a subframe, or Q6 orthogonal frequency division multiplexing (OFDM) symbols, where Q6 is a positive integer; and / or, the seventh time unit is a half-frame, a subframe, or Q7 orthogonal frequency division multiplexing (OFDM) symbols, where Q7 is a positive integer.

38. The synchronous information transmission method according to claim 37, wherein, The synchronization information received from the network-side device includes: Listen to the interval from the K3th fourth time unit to the K3+L1-1th fourth time unit after the second trigger signal is sent, and receive the fourth SSB set; And / or, listen to the interval from the K4th fifth time unit to the K4+L2-1th fifth time unit after the second trigger signal is sent, and receive the second PBCH set.

39. The synchronous information transmission method according to claim 22, wherein, The transmission of one of the first SSB sets occupies one eighth time unit, and the first SSB set is transmitted at least twice and within consecutive eighth time units; And / or, the transmission of one of the first PBCH sets occupies a ninth time unit, and the first PBCH set is transmitted at least twice and within consecutive ninth time units; And / or, the transmission of one of the second SSB sets occupies a tenth time unit, and the second SSB set is transmitted at least twice and within consecutive tenth time units; Wherein, the eighth time unit is a half-frame, a subframe, or Q8 orthogonal frequency division multiplexing (OFDM) symbols, where Q8 is a positive integer; and / or, the ninth time unit is a half-frame, a subframe, or Q9 orthogonal frequency division multiplexing (OFDM) symbols, where Q9 is a positive integer; and / or, the tenth time unit is a half-frame, a subframe, or Q10 orthogonal frequency division multiplexing (OFDM) symbols, where Q10 is a positive integer.

40. The synchronous information transmission method according to claim 22 or 39, wherein, The starting transmission time of the first SSB set is the start time of the K5th eighth time unit after the terminal sends the first trigger signal; And / or, the start time of the first PBCH set is the start time of the K6th ninth time unit after the terminal sends the first trigger signal; And / or, the start time of the first second SSB set is the start time of the K7th tenth time unit after the terminal sends the first trigger signal; And / or, the initial transmission time of the first first SSB set is within the interval from the K8th eighth time unit to the K8+L3-1th eighth time unit after the terminal sends the first trigger signal; And / or, the start time of the first PBCH set is within the interval from the K9th ninth time unit to the K9+L4-1th ninth time unit after the terminal sends the first trigger signal; And / or, the start time of the first second SSB set is within the interval from the K10th tenth time unit to the K10+L5-1th tenth time unit after the terminal sends the first trigger signal; And / or, the initial transmission time of the first first SSB set is within the first eleventh time unit after the network-side device processing time requirement is met, which is predefined; And / or, the start time of the first PBCH set is within the first twelfth time unit after the network-side device processing time requirement is met, which is predefined; And / or, the initial transmission time of the first second SSB set is within the first thirteenth time unit after the network-side device processing time requirement is met, which is predefined; Wherein, the eleventh time unit is a half-frame, a subframe, or Q11 orthogonal frequency division multiplexing (OFDM) symbols, where Q11 is a positive integer; and / or, the twelfth time unit is a half-frame, a subframe, or Q12 orthogonal frequency division multiplexing (OFDM) symbols, where Q12 is a positive integer; and / or, the thirteenth time unit is a half-frame, a subframe, or Q13 orthogonal frequency division multiplexing (OFDM) symbols, where Q13 is a positive integer.

41. The synchronous information transmission method according to claim 40, wherein, The synchronization information received from the network-side device includes: Listen to the interval from the K8th eighth time unit to the K8+L3-1th eighth time unit after the first trigger signal is sent, and receive the first SSB set; And / or, listen to the interval from the K9th ninth time unit to the K9+L4-1th ninth time unit after the first trigger signal is sent, and receive the first PBCH set; And / or, monitor the interval from the K10th tenth time unit to the K10+L5-1th tenth time unit after the first trigger signal is sent, and receive the second SSB set.

42. The synchronous information transmission method according to claim 22, wherein, Also includes: Send a trigger signal to the network-side device; The trigger signal includes the first trigger signal and / or the second trigger signal.

43. A synchronization information transmission device, wherein the synchronization information transmission device is a network-side device, comprising a memory, a transceiver, and a processor: A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations: Synchronization information is sent to the terminal via the transceiver; wherein... The synchronization information includes a first set of synchronization signal blocks (SSBs) and a first set of physical broadcast channels (PBCHs). Alternatively, the synchronization information includes a second SSB set, in which at least one SSB is repeatedly transmitted; Alternatively, the synchronization information may include a third SSB set with a transmission period greater than 20ms, the third SSB set being used for the initial access of the terminal.

44. A synchronous information transmission device, wherein the synchronous information transmission device is a terminal, comprising a memory, a transceiver, and a processor: A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations: The transceiver receives synchronization information sent by network-side devices; wherein, The synchronization information includes a first set of synchronization signal blocks (SSBs) and a first set of physical broadcast channels (PBCHs); or, the synchronization information includes a second set of SSBs, wherein at least one SSB in the second set of SSBs is repeatedly transmitted; or, the synchronization information includes a third set of SSBs with a transmission period greater than 20ms, wherein the third set of SSBs is used for the initial access of the terminal. Based on the synchronization information, a broadcast message is obtained.

45. A synchronization information transmission device, applied to network-side equipment, comprising: The first transmitting unit is used to transmit synchronization information to the terminal; wherein, the synchronization information includes a first synchronization signal block (SSB) set and a first physical broadcast channel (PBCH) set; Alternatively, the synchronization information includes a second SSB set, in which at least one SSB is repeatedly transmitted; Alternatively, the synchronization information may include a third SSB set with a transmission period greater than 20ms, the third SSB set being used for the initial access of the terminal.

46. ​​A synchronous information transmission device, applied to a terminal, comprising: The second receiving unit is used to receive synchronization information sent by the network-side device; wherein the synchronization information includes a first synchronization signal block (SSB) set and a first physical broadcast channel (PBCH) set; or, the synchronization information includes a second SSB set, wherein at least one SSB in the second SSB set is repeatedly transmitted; or, the synchronization information includes a third SSB set with a transmission period greater than 20ms, wherein the third SSB set is used for the initial access of the terminal. The first processing unit is used to obtain the broadcast message based on the synchronization information.

47. A non-transiently readable storage medium storing a program for causing a processor to execute the synchronous information transmission method according to any one of claims 1 to 42.

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