Synchronization information block transmission method and related equipment

Abstract

The invention provides a transmission method of a synchronization information block and related equipment, and relates to the technical field of communication. The method comprises the following steps: sending an indication signal to a terminal, wherein the indication signal is used for indicating to trigger transmission of one or more synchronization information blocks on demand; and sending a synchronization information block to the terminal as required according to the indication signal.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a method for transmitting a synchronization information block, a network device, a terminal, a communication system, a communication device, a computer-readable storage medium, and a computer program product. Background Art

[0002] To reduce the number of long-term online signals, the NR (New Radio) system packages the PBCH (Physical Broadcast Channel) and synchronization signals into a single SSB (Synchronization Signal Block) for the initial cell search process of the UE (User Equipment). The SSB consists of three parts: the Primary Synchronization Signal (PSS), the Secondary Synchronization Signal (SSS), and the Physical Broadcast Channel (PBCH). The PBCH block contains information such as the Master Information Block (MIB) and indicates critical system information such as the location of the SIB1 (System Information Block 1). The SSB occupies four OFDM (Orthogonal Frequency Division Multiplexing) symbols in the time domain and 20 PRBs (Physical Resource Blocks), or 240 subcarriers, in the frequency domain. Summary of the Invention

[0003] An embodiment of the present disclosure provides a method for transmitting a synchronization information block, the method comprising: sending an indication signal to a terminal, the indication signal being used to instruct on-demand triggering of transmission of one or more synchronization information blocks; and sending the synchronization information blocks to the terminal on-demand based on the indication signal. In an exemplary embodiment, the method may be performed by a network device (e.g., a base station) or by a device configured in the network device (e.g., a chip).

[0004] An embodiment of the present disclosure provides a method for transmitting a synchronization information block, the method comprising: receiving an indication signal for triggering the transmission of one or more synchronization information blocks on demand; and receiving the synchronization information blocks sent on demand according to the indication signal. In an exemplary embodiment, the method may be performed by a terminal, or by a device configured in the terminal (e.g., a chip).

[0005] An embodiment of the present disclosure provides a network device, which includes: a transceiver unit, used to send an indication signal to a terminal, wherein the indication signal is used to indicate the on-demand triggering of the transmission of one or more synchronization information blocks; the transceiver unit is also used to send synchronization information blocks to the terminal on demand according to the indication signal.

[0006] An embodiment of the present disclosure provides a terminal, which includes: a transceiver unit, configured to receive an indication signal, wherein the indication signal is used to indicate triggering the transmission of one or more synchronization information blocks on demand; the transceiver unit is further configured to receive synchronization information blocks sent on demand according to the indication signal.

[0007] An embodiment of the present disclosure provides a communication system, which includes: a network device as described in any embodiment of the present disclosure and a terminal as described in any embodiment of the present disclosure.

[0008] An embodiment of the present disclosure provides a communication device. In one design, the communication device may include a module corresponding to each of the methods / operations / steps / actions described in any embodiment of the present disclosure. The module may be a hardware circuit, software, or a combination of a hardware circuit and software. In one design, the communication device includes: a transceiver unit for sending an indication signal to a terminal, wherein the indication signal is used to indicate the on-demand triggering of the transmission of one or more synchronization information blocks. The transceiver unit is also used to send synchronization information blocks to the terminal on demand according to the indication signal. In another design, the communication device includes: a transceiver unit for receiving an indication signal, wherein the indication signal is used to indicate the on-demand triggering of the transmission of one or more synchronization information blocks. The transceiver unit is also used to receive synchronization information blocks sent on demand according to the indication signal.

[0009] An embodiment of the present disclosure provides a communication device, comprising: a processor. The processor can implement the method of any embodiment of the present disclosure. Optionally, the communication device also includes a memory, and the processor is coupled to the memory and can be used to execute a computer program in the memory to implement the method of any embodiment of the present disclosure. Optionally, the communication device also includes a communication interface, and the processor is coupled to the communication interface. In the embodiment of the present disclosure, the communication interface can be a transceiver, pin, circuit, bus, module, or other type of communication interface, without limitation.

[0010] In one implementation, the communication device is a terminal. When the communication device is a terminal, the communication interface may be a transceiver or an input / output interface.

[0011] In another implementation, the communication device is a chip configured in a terminal. When the communication device is a chip configured in a terminal, the communication interface may be an input / output interface.

[0012] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0013] In one implementation, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver or an input / output interface.

[0014] In another implementation, the communication device is a chip configured in a network device. When the communication device is a chip configured in a network device, the communication interface may be an input / output interface.

[0015] The present disclosure also provides a processor including an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method of any embodiment of the present disclosure.

[0016] In an exemplary embodiment, the processor may be one or more chips, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, or various logic circuits. The input signal received by the input circuit may be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by a transmitter. The input circuit and the output circuit may be the same circuit, functioning as an input circuit and an output circuit at different times. The embodiments of this disclosure do not limit the specific implementation of the processor and various circuits.

[0017] The embodiment of the present disclosure further provides a communication system, comprising at least one communication device in the embodiment of the present disclosure.

[0018] An embodiment of the present disclosure provides a communication device, comprising: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to execute the synchronization information block transmission method in any embodiment of the present disclosure by executing the executable instructions.

[0019] An embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for transmitting a synchronization information block in any embodiment of the present disclosure is implemented.

[0020] An embodiment of the present disclosure provides a computer program product, including a computer program, which, when executed by a processor, implements the method for transmitting a synchronization information block in any embodiment of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0022] Figure 1 A schematic structural diagram of a communication system in an embodiment of the present disclosure is shown.

[0023] Figure 2 A flowchart of a method for transmitting a synchronization information block in an embodiment of the present disclosure is shown.

[0024] Figure 3 A flowchart illustrating another method for transmitting a synchronization information block in an embodiment of the present disclosure is shown.

[0025] Figure 4 A flowchart illustrating another method for transmitting a synchronization information block in an embodiment of the present disclosure is shown.

[0026] Figure 5 A flowchart of another method for transmitting a synchronization information block in an embodiment of the present disclosure is shown.

[0027] Figure 6 A flowchart of another method for transmitting a synchronization information block in an embodiment of the present disclosure is shown.

[0028] Figure 7 A flowchart of another method for transmitting a synchronization information block in an embodiment of the present disclosure is shown.

[0029] Figure 8 A flowchart of another method for transmitting a synchronization information block in an embodiment of the present disclosure is shown.

[0030] Figure 9 A flowchart of another method for transmitting a synchronization information block in an embodiment of the present disclosure is shown.

[0031] Figure 10 A structural block diagram of a network device in an embodiment of the present disclosure is shown.

[0032] Figure 11 A structural block diagram of a terminal in an embodiment of the present disclosure is shown.

[0033] Figure 12 A structural block diagram of a communication device in an embodiment of the present disclosure is shown.

[0034] Figure 13 A schematic diagram illustrating a computer-readable storage medium in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0035] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0036] The accompanying drawings are merely schematic illustrations of the present disclosure. Identical reference numerals in the drawings denote identical or similar components, and thus their repeated descriptions will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities that do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0037] In this disclosure, at least one (item) can be described as one (item) or multiple (items), and multiple (items) can be two (items), three (items), four (items) or more (items), without limitation. " / " can indicate that the objects associated with each other are in an "or" relationship, for example, A / B can mean A or B; "and / or" can be used to describe that there are three relationships between the associated objects, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. To facilitate the description of the technical solutions of this application, words such as "first", "second", "A", or "B" can be used to distinguish technical features with the same or similar functions. The words "first", "second", "A", or "B" do not limit the quantity or execution order. Moreover, the words "first", "second", "A", or "B" do not necessarily mean different. The words "exemplary" or "for example" are used to indicate an example, instance, or illustration. Any design solution described as "exemplary" or "for example" should not be interpreted as being preferred or advantageous over other designs. The use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0038] The specific implementation of the embodiment of the present disclosure is described in detail below with reference to the accompanying drawings.

[0039] like Figure 1 As shown, the communication system architecture includes a radio access network and a core network. The radio access network may include at least one radio access network device (such as Figure 1 The network device 20 in the embodiment may also include at least one terminal (such as Figure 1The terminal 10 in FIG. 10 is wirelessly connected to the radio access network device, which is then connected to the core network via wireless or wired connections. The core network device and the radio access network device can be independent, distinct physical devices. Alternatively, the core network device's functions and the radio access network device's logical functions can be integrated into the same physical device. Alternatively, a single physical device can integrate some of the core network device's functions and some of the radio access network device's functions. Terminals and radio access network devices can be connected to each other via wired or wireless connections. Figure 1 This is just a schematic diagram. The communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices. Figure 1 Not shown.

[0040] The network device 20 can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a fifth generation (5G) mobile communication system, a next generation base station in a sixth generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc.; it can also be a module or unit that completes part of the functions of a base station, for example, a centralized unit (CU) or a distributed unit (DU). The network device 20 can be a macro base station, a micro base station or an indoor station, a relay node or a donor node, etc. The embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the network device 20. For ease of description, the following description takes a base station as an example of the network device 20.

[0041] The terminal 10 may also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. The terminal can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city, etc. The terminal can be a mobile phone, tablet computer, computer with wireless transceiver function, wearable device, vehicle, drone, helicopter, airplane, ship, robot, robotic arm, smart home device, etc. The embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the terminal.

[0042] Base stations and terminals can be fixed or mobile. They can be deployed on land, indoors or outdoors, handheld or vehicle-mounted; on water; or on aircraft, balloons, and satellites. The embodiments of this disclosure do not limit the application scenarios of base stations and terminals.

[0043] The roles of base stations and terminals can be relative. For example, a helicopter or drone can be configured as a mobile base station. For those terminals that access the wireless access network through the helicopter or drone, the helicopter or drone is a base station; but for the base station, the helicopter or drone is a terminal, that is, the base station and the helicopter or drone communicate through the wireless air interface protocol. Of course, the base station and the helicopter or drone can also communicate through the interface protocol between base stations. In this case, relative to the base station, the helicopter or drone is also a base station. Therefore, base stations and terminals can be collectively referred to as communication devices / communication equipment. Figure 1 The network device 20 in the embodiment may be referred to as a communication device / communication device having a base station function. Figure 1 The terminal 10 in the figure can be called a communication device / communication equipment with terminal functions.

[0044] Communication between base stations and terminals, between base stations, and between terminals can be carried out using licensed spectrum, unlicensed spectrum, or both. Communication can be carried out using spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or both. The embodiments of this disclosure do not limit the spectrum resources used for wireless communications.

[0045] In the embodiments of the present disclosure, the functions of a base station may be performed by a module (such as a chip) in the base station, or by a control subsystem that includes the base station functions. The control subsystem that includes the base station functions here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, intelligent transportation, and smart city. The functions of a terminal may also be performed by a module (such as a chip or modem) in the terminal, or by a device that includes the terminal functions.

[0046] The technical solutions provided in the embodiments of the present disclosure can be applied to wireless communications between communication devices. Wireless communications between communication devices may include wireless communications between network devices and terminals, wireless communications between network devices, and wireless communications between terminals. In the embodiments of the present disclosure, the term "wireless communications" may also be referred to as "communication," which may also be described as "data transmission," "information transmission," or "transmission."

[0047] Those skilled in the art will know that Figure 1 The number of terminals and network devices in the figure is merely illustrative, and any number of terminals and network devices may be provided according to actual needs. This disclosure does not limit this.

[0048] Under the above-mentioned system architecture, embodiments of the present disclosure provide a method for transmitting synchronization information blocks, which can be executed by any communication device with information processing capabilities. In some embodiments, the method for transmitting synchronization information blocks provided in embodiments of the present disclosure can be executed by a terminal in the above-mentioned system architecture; in other embodiments, the method for transmitting synchronization information blocks provided in embodiments of the present disclosure can be implemented by a network device in the above-mentioned system architecture. In still other embodiments, the method for transmitting synchronization information blocks provided in embodiments of the present disclosure can be implemented by a terminal and a network device in the above-mentioned system architecture through interaction.

[0049] Figure 2 A flowchart of a method for transmitting a synchronization information block in an embodiment of the present disclosure is shown. Figure 2 The method provided in the embodiment may be executed by a network device, which may be a base station, for example, but the present disclosure is not limited thereto. Figure 2 As shown, the method provided by the embodiment of the present disclosure may include the following steps.

[0050] In S210, an indication signal is sent to a terminal, where the indication signal is used to instruct on-demand triggering of transmission of one or more synchronization information blocks.

[0051] In the embodiment of the present disclosure, on-demand means that the SSB sender (such as a base station) sends the corresponding SSB signal at any time / instantly according to the needs of the communication system or the SSB receiver (such as a terminal). This signal transmission mode of transmitting SSB on demand can be applied to the NR system, but the present disclosure is not limited to this. The transmission of SSB triggered on demand refers to a transmission method different from transmitting SSB according to the default period (such as 20ms). When the base station determines to send SSB to the UE on demand instead of sending SSB to the UE according to the default period, the base station can generate the indication signal and send the indication signal to the UE.

[0052] It should be noted that the SSB for on-demand triggered transmission may be sent periodically, and the period of on-demand triggered transmission may not be equal to the above-mentioned default period; it may also not be sent periodically, for example, only triggering the transmission of one SSB.

[0053] In an embodiment of the present disclosure, the base station may instruct the terminal to detect SSB according to the configuration (the configuration may be sent by the base station to the terminal or may be agreed upon in the protocol, which is not limited in the present disclosure) by sending the indication signal to the terminal. After the UE receives the indication signal, it may be informed that the base station will start sending SSB on demand. At this time, if the UE has received the configuration from the base station, it may detect the SSB triggered on demand by the base station based on the received configuration. If the UE does not receive the configuration sent by the base station, the UE may detect the SSB triggered on demand by the base station based on the agreement of the protocol or a predetermined configuration (for example, the default period is 20ms).

[0054] It is understood that the naming of the "indication signal" in the embodiments of the present disclosure is not limited, as long as it can be used to indicate that the network device will transmit the SSB signal to the terminal in an on-demand triggering manner / mode. The indication signal can be included in existing signaling / instructions or implemented by adding new signaling. When the indication signal is sent from the network device to the terminal, it is a downlink signaling and is used to trigger the on-demand transmission of SSB. Therefore, it can also be called a "downlink trigger signal / signaling / instruction / command."

[0055] In an exemplary embodiment, the terminal is connected to a primary cell and a secondary cell. The sending of the indication signal to the terminal includes: sending the indication signal on the primary cell or on the secondary cell.

[0056] Since logical cells are actually distinguished by carriers, the concepts of "cell", "carrier", "cell carrier", "cell carrier" and so on in the embodiments of the present disclosure have the same meaning and can be used interchangeably.

[0057] The method provided by the embodiment of the present disclosure can be used in a multi-carrier scenario where the terminal is connected to multiple cells at the same time. For the multi-carrier scenario, the downlink trigger signal can be sent on the primary cell or on the secondary cell. That is, the present disclosure can be applied to the CA (Carrier Aggregation) scenario. For example, the terminal accesses two or more cells at the same time, one is called the primary cell, which can also be expressed as PCell, and the others can be called secondary cells, which can also be expressed as SCell. PCell assumes the functions of the control plane and the data plane, and SCell only assumes the functions of the data plane. Specifically, it can be divided into two modes: intra-band and inter-band. In some embodiments, the method provided by the embodiment of the present disclosure can also be applied to a single-carrier scenario, that is, a scenario in which the terminal is connected to only one cell carrier.

[0058] When a terminal is in carrier aggregation, since it must maintain a connection with the primary cell carrier, it can selectively reduce signal transmission on some secondary cell carriers to reduce network energy consumption on the secondary cell carriers while maintaining network performance. To achieve network energy saving, some embodiments can introduce SSB-less technology, that is, completely stop sending SSB on the secondary cell carrier, relying on the SSB on the primary cell carrier to achieve the relevant requirements of secondary cell carrier synchronization and access.

[0059] However, in some scenarios, especially inter-band CA, SSB-less technology can lead to degraded network performance due to the large carrier gap between the primary and secondary cells. In this case, the introduction of on-demand SSB technology can effectively reduce SSB transmission, achieving network energy savings while ensuring the performance of the secondary cell.

[0060] In an exemplary embodiment, before the indication signal is sent to the terminal, the secondary cell has been activated and the terminal has accessed the secondary cell, and no synchronization information block is sent on the secondary cell. The method provided by the embodiment of the present disclosure can be applied in the following scenarios: the terminal establishes connections with the primary cell PCell A and the secondary cell SCell B at the same time. The secondary cell has been activated and the terminal has accessed SCell B, but no SSB is sent yet. In this way, it is possible to achieve that when there is no demand, the base station does not need to send SSB to the terminal. Only when there is a demand, after the base station sends an indication signal to the terminal, it triggers the sending of SSB to the terminal on demand. This can reduce the sending of SSB and achieve network energy saving without affecting the performance of the secondary cell.

[0061] In an exemplary embodiment, the indication signal is included in downlink control signaling or media access control layer control element signaling. In the embodiment of the present disclosure, the indication signal or downlink trigger signal can be implemented by downlink control signaling (Downlink Control Information, DCI) or media access control layer control element signaling (Media Access Control Control Element, MAC CE).

[0062] In an exemplary embodiment, when the terminal is connected to multiple cells, the indication signal includes second indication information, and the second indication information is used to indicate the cell for sending the synchronization information block triggered on demand. In an embodiment of the present disclosure, when the terminal is associated with multiple carriers, the indication signal or downlink trigger signaling also indicates the cell for sending the triggered SSB. The present disclosure does not limit the specific indication method. For example, the indicator signal may carry an identifier of the cell for sending the triggered SSB, such as an identifier of SCell B.

[0063] In an exemplary embodiment, the method provided by the embodiment of the present disclosure also includes: receiving an uplink signal from the terminal; and determining whether to send the indication signal to the terminal according to the uplink signal. In the embodiment of the present disclosure, when the terminal has an SSB demand, it can send an uplink signal to the base station to request the base station to send an SSB signal to the terminal on demand, that is, the uplink signal is used to instruct the base station to send an SSB to the terminal on demand, so it can also be called an uplink trigger signal. The uplink signal can be implemented through an existing signal, that is, carried in an existing signal, or it can be implemented by adding a new uplink signal / command / instruction. The present disclosure does not limit this, as long as it can instruct the base station to trigger the transmission of SSB on demand. That is, the indication signal or downlink trigger signal generated by the base station can be triggered by the terminal through the uplink signal / uplink trigger signal. After the base station receives the uplink signal / uplink trigger signal sent by the terminal, it can decide whether to send the indication signal / downlink trigger signal.

[0064] In S220, a synchronization information block is sent to the terminal as needed according to the indication signal.

[0065] In an exemplary embodiment, the terminal is connected to a primary cell and a secondary cell. The sending of a synchronization information block to the terminal on demand according to the indication signal includes: sending a synchronization information block to the terminal on demand on the secondary cell according to the indication signal. In the embodiment of the present disclosure, the SSB triggered by the base station on demand is only sent on the secondary cell. That is, the embodiment of the present disclosure does not completely stop sending SSB on the secondary cell, and it does not rely on the SSB on the primary cell to achieve the relevant requirements of secondary cell synchronization and access. Therefore, it can meet the needs of some scenarios, especially inter-band CA. Although the carrier gap between the primary cell and the secondary cell may be large, the on-demand SSB technology can ensure that the network performance does not decrease while achieving network energy saving.

[0066] In an exemplary embodiment, the method provided by the embodiment of the present disclosure further includes: sending first configuration information to the terminal, where the first configuration information includes first synchronization information block parameters.

[0067] In the embodiment of the present disclosure, the configuration information of the SSB that is triggered to be transmitted on demand can be sent to the terminal via the configuration information sent by the base station. After sending the indication signal, the base station can send the SSB to the terminal on demand according to the configuration information. After receiving the indication signal, the terminal can detect the SSB transmitted on demand according to the received configuration information. The configuration information in the embodiment of the present disclosure is used to configure the relevant information of the network device to trigger the SSB to the terminal on demand, and therefore can also be referred to as synchronization information block parameters or SSB configuration information, such as at least one of the cycle length, time-frequency resource position (including time domain resource position and / or frequency domain resource position) of the SSB when triggered on demand. In order to distinguish it from the configuration information updated subsequently, it is referred to as the "first configuration information" here, and the corresponding SSB parameters are referred to as the "first synchronization information block parameters".

[0068] In an exemplary embodiment, the first synchronization information block parameter includes a first cycle length of the synchronization information block. This first cycle length can be used to configure the period at which the on-demand SSB is transmitted. This period can be different from or the same as the default period, for example, both are 20ms, except that during the default period transmission, the SSB is not triggered on demand. After sending the indication signal to the terminal, the base station can periodically send the SSB to the terminal according to the first cycle length. The terminal can periodically detect the SSB based on the first cycle length.

[0069] In an exemplary embodiment, the first synchronization information block parameter includes a first time-frequency resource location of the synchronization information block. The first time-frequency resource location is used to configure the time domain location and / or frequency domain location occupied by the on-demand SSB. After sending the indication signal to the terminal, the base station may send the SSB to the terminal at the first time-frequency resource location. The terminal may detect the SSB at the first time-frequency resource location.

[0070] In an exemplary embodiment, the first synchronization information block parameter includes the planned number of first synchronization information blocks to be sent. The number of first synchronization information blocks is used to configure the planned number of SSBs to be transmitted on demand. In some embodiments, after the base station sends the planned number of SSBs to the terminal, it stops transmitting SSBs on demand to the terminal. After receiving the planned number of SSBs, the terminal stops detecting SSBs for the current on-demand transmission. This enables on-demand triggering and termination of SSBs, thereby achieving network energy conservation.

[0071] In an exemplary embodiment, the first synchronization information block parameter includes time information of the synchronization information block. The time information is used to configure at least one of the duration, time window, start time, and end time of the on-demand SSB transmission. For example, after sending an indication signal, the base station may begin triggering the transmission of the SSB on demand. The timer may start counting from the start of the on-demand SSB transmission, and stop sending the SSB to the terminal when the configured duration is reached. The terminal may start counting from the receipt of the on-demand triggered SSB, and stop detecting the SSB when the configured duration is reached. For another example, the base station may trigger the on-demand transmission of the SSB within the configured time window, and stop triggering the on-demand transmission of the SSB outside the time window. For another example, the terminal may detect the on-demand transmission of the SSB within the configured time window, and stop detecting the on-demand transmission of the SSB outside the time window. For another example, the base station may start triggering the transmission of the SSB on demand at the configured start time, and stop triggering the transmission of the SSB on demand when the configured end time is reached. For the terminal, it starts detecting the SSB for on-demand transmission at the configured start time and stops detecting the SSB for on-demand transmission when the end time is reached. That is, the time information in the first configuration information can be used to determine when to start and when to end the transmission of the on-demand SSB.

[0072] In an exemplary embodiment, when the first configuration information includes multiple sets of first synchronization information block parameters, the indication signal includes first indication information, and the first indication information is used to indicate the first synchronization information block parameters used. In the embodiment of the present disclosure, the base station may configure one or more sets of SSB parameters for the terminal at the same time (here, for the sake of distinction, referred to as the first SSB parameters). When multiple sets of SSB parameters are configured at the same time, the indication signal may include indication information for indicating which set of SSB parameters to use (for the sake of distinction from other indication information, referred to as the first indication information), for example, assigning an identifier to each set of SSB parameters, and indicating which set of SSB parameters to use for on-demand transmission of SSB by carrying the identifier of the corresponding SSB parameters in the indication signal, but the specific indication method disclosed in this disclosure is not limited to this. By configuring multiple sets of SSB parameters for the terminal at the same time in the same first configuration information, the embodiment of the present disclosure can reduce the number of times the base station sends configuration information to the terminal, thereby saving network energy consumption.

[0073] In an exemplary embodiment, if the first configuration information is sent to the terminal before the indication signal is sent to the terminal, then after the indication signal is sent to the terminal, a synchronization information block is sent to the terminal on demand according to the first configuration information. In an embodiment of the present disclosure, the base station may send the first configuration information to the terminal before the base station sends the indication signal / downlink trigger signal. In this way, after the base station sends the indication signal / downlink trigger signal to the terminal, the transmission of the SSB can be triggered on demand immediately according to the pre-configured first configuration information, thereby improving the efficiency of on-demand transmission of the SSB.

[0074] In an exemplary embodiment, the first configuration information includes the indication signal. In an embodiment of the present disclosure, the indication signal / indication information may also be included in the configuration information (e.g., the first configuration information). In this case, the base station does not need to send the indication signal / indication information to the terminal separately. If the configuration information (e.g., the first configuration information) does not include the indication signal / indication information, the base station then sends the indication signal / indication information to the terminal separately. By including the indication signal in the configuration information, when the base station sends the configuration information to the terminal, the on-demand transmission of SSB can be achieved according to the indication signal included in the configuration information and the SSB parameters included in the configuration information. This can further reduce the number of signal transmissions between the base station and the terminal, save network energy consumption, and improve the efficiency of on-demand SSB transmission. After receiving the configuration information, the terminal can start to detect on-demand SSB according to the indication signal and SSB parameters carried in the configuration information.

[0075] In an exemplary embodiment, if the first configuration information is sent to the terminal after the indication signal is sent to the terminal, then a synchronization information block is sent to the terminal on demand according to the indication signal, including: after sending the indication signal to the terminal and before sending the first configuration information to the terminal, a synchronization information block is sent to the terminal on demand according to a predetermined configuration (established rule); after sending the indication signal and the first configuration information to the terminal, a synchronization information block is sent to the terminal on demand according to the first configuration information. In the embodiment of the present disclosure, the base station may also send configuration information (such as the first configuration information) to the terminal after the indication signal / downlink trigger signal is sent. Before the base station sends or configures the first configuration information to the terminal, the base station may send the SSB according to the predetermined configuration, and the terminal side may detect the SSB according to the predetermined configuration. The predetermined configuration may be a default rule between the base station and the terminal, such as periodically sending and detecting the SSB according to a default period of 20ms. Therefore, the predetermined configuration may also be referred to as an "established rule." After the base station sends or configures the first configuration information to the terminal, the base station can send the SSB according to the first configuration information, and the terminal side can detect the SSB according to the first configuration information. In other embodiments, after the base station sends the indication signal, it can also wait for the generation and transmission of the first configuration information. Before the first configuration information is generated and sent, the on-demand SSB transmission is not triggered. After the first configuration information is generated and sent, the on-demand SSB transmission is performed according to the first configuration information. Correspondingly, after receiving the indication signal, if the terminal does not receive the first configuration information, it will not detect the SSB until it receives the first configuration information, and then perform the on-demand SSB detection according to the first configuration information.

[0076] In an exemplary embodiment, the first configuration information is included in radio resource control signaling or media access control layer control element signaling. In the embodiments of the present disclosure, the configuration information (including the first configuration information and may also include the second configuration information described below) sent by the base station to the terminal can be configured to the terminal via RRC (Radio Resource Control) or MAC CE, but the present disclosure is not limited to this. When the configuration information is configured to the terminal via RRC, it can also be referred to as RRC configuration. When the configuration information is configured to the terminal via MAC CE, it can also be referred to as MAC CE configuration.

[0077] In an exemplary embodiment, the terminal is connected to a primary cell and a secondary cell. Sending the first configuration information to the terminal includes sending the first configuration information on the primary cell or on the secondary cell. In this disclosed embodiment, the base station may send SSB configuration information of SCell B to the terminal via PCell A. In other embodiments, if applicable, the configuration information may also be sent to the terminal via SCell B.

[0078] In an exemplary embodiment, the method provided by the embodiment of the present disclosure further includes: sending second configuration information to the terminal, where the second configuration information includes second synchronization information block parameters. Sending the synchronization information block to the terminal on demand based on the indication signal includes: after sending the indication signal and the second configuration information to the terminal, sending the synchronization information block to the terminal on demand based on the second configuration information.

[0079] In an embodiment of the present disclosure, after sending an indication signal, if the base station does not generate or send a termination signal, or the duration specified in the first configuration information is not reached, or it is still in the time window specified in the first configuration information, or the termination time specified in the first configuration information is not reached, then the SSB will continue to be sent according to the established configuration (for example, the above-mentioned predetermined configuration or the first configuration information). During this period, the SSB-related parameters can be changed by sending the updated configuration information (for distinction, referred to as the second configuration information), and the changed SSB-related parameters are referred to as the second SSB parameters. After the base station generates or sends the second configuration information, the base station transmits the on-demand SSB according to the second configuration information, that is, replaces the first configuration information or the predetermined configuration with the second configuration information. After receiving the second configuration information, the terminal detects the on-demand SSB according to the second configuration information.

[0080] In an exemplary embodiment, the second SSB parameter includes a second cycle length of the synchronization information block.

[0081] In an exemplary embodiment, the second SSB parameter includes a second time-frequency resource position of the synchronization information block.

[0082] In an exemplary embodiment, the second SSB parameter includes the number of second synchronization information blocks planned to be sent.

[0083] In an exemplary embodiment, the second SSB parameter includes time information of the synchronization information block.

[0084] In an exemplary embodiment, at least one of the second SSB parameters in the second configuration information is different from the first SSB parameter in the first configuration information.

[0085] In an exemplary embodiment, when the second configuration information includes multiple sets of second synchronization information block parameters, the indication signal includes indication information for indicating the adopted second synchronization information block parameters.

[0086] In an exemplary embodiment, the method provided by the embodiment of the present disclosure further includes: sending a termination signal to the terminal, wherein the termination signal is used to indicate the termination of on-demand triggered synchronization information block transmission; and stopping sending synchronization information blocks to the terminal on demand according to the termination signal.

[0087] In the embodiment of the present disclosure, the base station may send a downlink signal to the terminal to terminate the transmission of the SSB. Therefore, the downlink signal may also be referred to as a termination signal / downlink termination signal / termination signaling / termination information / termination instruction / termination command. After the terminal receives the termination signal, it may stop detecting the SSB. In the embodiment of the present disclosure, the base station sends an indication signal and a termination signal, which can realize the on-demand start and termination of SSB transmission. There is no need to send SSB to the terminal according to the default period all the time, thereby saving network energy consumption.

[0088] It should be noted that the method of terminating SSB transmission in the embodiment of the present disclosure is not limited to the above-mentioned method of the base station sending a termination signal to the terminal. For example, the time window / duration can also be set or agreed upon by the configuration information. When it is not within the time window or reaches the set duration, the base station automatically terminates the transmission of the on-demand SSB, and the terminal automatically terminates the detection of the on-demand SSB. For another example, it can be automatically terminated after the base station sends the expected number of SSBs to be sent according to the expected number of SSBs to be sent set in the configuration information (which may include the first configuration information and / or the second configuration information). The terminal automatically terminates the detection after receiving the expected number of SSBs to be sent.

[0089] In an exemplary embodiment, the termination signal is included in downlink control signaling or media access control layer control element signaling. Specifically, the termination signal / termination signaling can also be implemented by DCI or MAC CE to indicate the termination of sending / detecting SSB.

[0090] In an exemplary embodiment, the indication signal and the termination signal are included in the first field of downlink control signaling or media access control layer control element signaling, the first value of the first field is used to indicate the indication signal, and the second value is used to indicate the termination signal. In the embodiment of the present disclosure, a new first field (also referred to as a downlink trigger signaling field / trigger field / trigger signaling field) can be added to the DCI or MAC CE, and different values of the first field can be used to realize the sending and termination of SSB. For example, when the value of the first field is the first value, it is used to indicate the triggering of transmission / detection of on-demand SSB, and when the value of the first field is the second value, it is used to indicate the termination of triggering transmission / detection of on-demand SSB. That is, the termination signal can reuse the same field in the indication signal, thereby reducing the complexity of the interaction between the base station and the terminal.

[0091] In an exemplary embodiment, a second field is included in downlink control signaling or media access control layer control element signaling, and the second field is used to indicate the termination signal. In other embodiments, the termination signal / termination signaling can be implemented by introducing a new field in DCI or MAC CE, which is referred to as the second field / downlink termination signaling field / termination field for distinction.

[0092] In an exemplary embodiment, new signaling may be introduced to serve as an indication signal or a termination signal.

[0093] In an exemplary embodiment, when the terminal is connected to multiple cells, the termination signal includes third indication information, which is used to indicate the cell that terminates on-demand triggered synchronization information block transmission. That is, in a multi-carrier scenario, the termination signal may further specify the carrier cell that terminates SSB transmission as needed.

[0094] In an exemplary embodiment, the terminal is connected to a primary cell and a secondary cell. Sending a termination signal to the terminal includes sending the termination signal on the primary cell or on the secondary cell. That is, the termination signal may also be sent on the PCell or the SCell.

[0095] In a communication network, the synchronization information block is used for synchronization between the terminal and the base station and for cell access, and is an indispensable public signal for the network. In some embodiments, it is necessary to periodically send SSB in the broadcast signal to achieve synchronization and access between the terminal and the base station. That is, the SSB is sent regularly in a periodic manner. For example, the SSB is sent according to the default period. When the cell users have no access and synchronization requirements, the periodic transmission of the SSB brings about excess transmission energy consumption, which will result in higher network energy consumption. The energy consumption of a single base station in a 5G network can reach more than three times that of LTE (Long Term Evolution), and because the 5G network has a higher spectrum and greater density, the total energy consumption of the 5G network is close to four times that of LTE, and the energy consumption cost accounts for nearly half of the total network operating cost. The embodiment of the present disclosure reduces the transmission energy consumption of the antenna and reduces the overall energy consumption of the network by reducing the transmission of periodic signals (such as SSB signals sent according to the default period). The embodiment of the present disclosure provides a set of base station-side triggered signaling processes for sending SSB to the UE on demand. Regardless of whether the base station is currently sending an SSB to the UE, the base station can trigger the sending of the SSB to the UE on demand according to actual needs, thereby reducing network energy consumption. The method provided by the embodiment of the present disclosure can be applied to the field of wireless communications.

[0096] Figure 3 A flowchart illustrating another method for transmitting a synchronization information block in an embodiment of the present disclosure is shown. Figure 3 The embodiment can be executed interactively by the base station and the terminal. Figure 3 As shown, the method provided by the embodiment of the present disclosure may include the following steps.

[0097] In S310, the base station sends the relevant RRC configuration of the SSB.

[0098] That is, the base station can send first configuration information to the terminal. The first configuration information can be configured to the terminal through RRC, for example. The first configuration information is used to indicate on-demand transmission of the SSB, and therefore, it can also be referred to as the relevant RRC configuration of the SSB. Correspondingly, the terminal receives the sent relevant RRC configuration of the SSB. The relevant RRC configuration of the SSB may include at least one of the first cycle length, the first time-frequency resource location, the number of first synchronization information blocks, time information, etc.

[0099] It should be noted that S310 is optional, that is, the base station and the terminal can also perform on-demand SSB transmission according to a predetermined configuration. Moreover, the transmission of S310 does not necessarily have to be before S320, but can also be after S320, or S310 and S320 can be performed simultaneously, that is, the indication signal / downlink signaling is included in the first configuration information.

[0100] In S320, downlink signaling triggers the transmission of SSB.

[0101] That is, the base station can generate an indication signal / downlink signaling and then send the indication signal / downlink signaling to the terminal to trigger the base station to transmit the SSB to the terminal on demand. Correspondingly, the terminal receives the indication signal / downlink signaling to know that the base station will transmit the SSB on demand.

[0102] In S330 , the terminal monitors the SSB signal at the corresponding position.

[0103] After the terminal receives the indication signal / downlink signaling in S320, it can detect the SSB signal according to the corresponding position determined according to the relevant RRC configuration of the SSB received in S310. The position here refers to the time-frequency resource position of the SSB, which can be determined according to one or more of the first cycle length, the first time-frequency resource position, the first number of synchronization information blocks, the time information, etc. in the relevant RRC configuration of the SSB.

[0104] In S340, the base station may terminate the transmission of the SSB through downlink signaling.

[0105] Optionally, the base station may terminate the transmission of the SSB by sending a termination signal / downlink signaling to the terminal. After the terminal receives the termination signal / downlink signaling, it stops detecting the SSB at the corresponding position.

[0106] The disclosed embodiments provide a method for transmitting synchronization blocks (SSBs) on demand. An indication signal, downlink trigger signal, or trigger request sent by a base station triggers the transmission of one or more SSBs on demand. Upon receiving the indication signal, downlink trigger signal, or trigger request, a terminal detects the SSBs based on configuration information (e.g., first configuration information). The transmission of this on-demand SSB can be terminated by the base station.

[0107] In an exemplary embodiment, the method provided by the embodiments of the present disclosure may be used in a multi-carrier scenario where a terminal is simultaneously connected to multiple cells, or in a single-carrier scenario where the terminal is connected to a single cell. For multi-carrier scenarios, the indication signal / downlink trigger signal / trigger request may be sent on either the primary cell or the secondary cell, but the triggered on-demand SSB is only sent on the secondary cell.

[0108] In an exemplary embodiment, the configuration information for SSBs to be transmitted on demand is configured to the terminal via RRC. This process can occur before or after the base station sends an indication signal / downlink trigger signal / trigger request. The configuration information may include at least one of the following: the SSB cycle length, the time-frequency resource location, etc. Optionally, the configuration information may also include the planned number of SSBs to be transmitted. The base station may simultaneously configure one or more sets of SSB parameters for the terminal.

[0109] In an exemplary embodiment, the indication signal / downlink trigger signal / trigger request is used to indicate the triggered SSB. If there is no SSB configuration at this time (i.e., no configuration information sent by the base station has been received), the SSB can be sent and the SSB on the terminal side can be detected according to established rules. When the terminal is associated with multiple carriers, the indication signal / downlink trigger signal / trigger request can also indicate the cell to which the triggered SSB is sent.

[0110] In an exemplary embodiment, the base station may send a downlink signal / termination signal / downlink signaling to terminate the transmission of an SSB. Specifically, the downlink signal / termination signal / downlink signaling may also be implemented by a DCI or MAC CE, indicating the termination of the SSB transmission. In a multi-carrier scenario, the downlink signal / termination signal / downlink signaling may also specify the carrier cell in which the SSB transmission is to be terminated, as needed.

[0111] In an exemplary embodiment, the downlink signal / termination signal / downlink signaling can be implemented by introducing a new field, or the downlink trigger signaling field in the indication signal can be reused to realize the sending and termination of SSB through different values.

[0112] In an exemplary embodiment, the downlink signal / termination signal / downlink signaling / SSB termination signal can be used to terminate both immediate and periodic SSBs. If no termination signal is present, the SSB will continue to be transmitted according to the established configuration, during which SSB-related parameters can be modified via RRC. In a multi-carrier scenario, the downlink signal / termination signal / downlink signaling / SSB termination signal can be sent on either the primary cell or the secondary cell.

[0113] In an exemplary embodiment, the indication signal / downlink trigger signal may be triggered by the terminal via an uplink signal / uplink trigger signal. Upon receiving the uplink trigger signal, the base station may decide whether to send the indication signal / downlink trigger signal. The indication signal / uplink trigger signal may be sent via a schedulable channel / signal on any carrier cell of the terminal.

[0114] Figure 4 A flowchart illustrating another method for transmitting a synchronization information block in an embodiment of the present disclosure is shown. Figure 4 The embodiment may be executed by a network device, for example, by a base station. Figure 4 As shown, the method provided by the embodiment of the present disclosure may include the following steps.

[0115] In S410, SSB related parameters are pre-configured as needed.

[0116] Optionally, the base station may preconfigure SSB-related parameters according to the needs of SSB transmission, for example, preconfigure first configuration information. The base station sends the preconfigured SSB-related parameters to the terminal. The terminal receives the preconfigured SSB-related parameters.

[0117] In S420, downlink signaling triggers the transmission of SSB.

[0118] The base station may send a downlink signaling / indication signal to the terminal. The terminal receives the downlink signaling / indication signal. After generating or sending the downlink signaling / indication signal, the base station triggers on-demand transmission of the SSB to the terminal based on the SSB-related parameters preconfigured in S410. After receiving the downlink signaling / indication signal, the terminal performs SSB detection based on the SSB-related parameters preconfigured in S410.

[0119] In S430 , the SSB is configured again as needed.

[0120] Optionally, the base station may reconfigure the relevant parameters for on-demand transmission of the SSB as needed, that is, the SSB-related parameters pre-configured in S410 may be updated, for example, referred to as second configuration information. The base station may send the SSB-related parameters configured in S430 to the terminal. The base station may send the SSB based on the SSB-related parameters configured in S430. After the terminal receives the SSB-related parameters configured by the base station in S430, it performs SSB detection according to the received reconfigured SSB-related parameters.

[0121] In S440, downlink signaling is sent to terminate SSB transmission.

[0122] Optionally, the base station may send a downlink signaling / termination signal to the terminal to terminate the transmission of the SSB. After receiving the downlink signaling / termination signal, the terminal stops detecting the SSB.

[0123] Figure 5 A flowchart of another method for transmitting a synchronization information block in an embodiment of the present disclosure is shown. Figure 5 The method provided in the embodiment can be executed by the terminal / terminal side. Figure 5 As shown, the method provided by the embodiment of the present disclosure may include the following steps.

[0124] In S510, an indication signal is received, where the indication signal is used to indicate triggering the transmission of one or more synchronization information blocks on demand.

[0125] In an exemplary embodiment, the method is performed by a terminal, and the terminal is connected to a primary cell and a secondary cell. Receiving the indication signal includes: receiving the indication signal on the primary cell or on the secondary cell.

[0126] In an exemplary embodiment, before receiving the indication signal, the secondary cell has been activated and the terminal has accessed the secondary cell, and has not received a synchronization information block on the secondary cell.

[0127] In an exemplary embodiment, the indication signal is included in downlink control signaling or media access control layer control element signaling.

[0128] In an exemplary embodiment, the method is executed by a terminal, and the method further includes: sending an uplink signal to a network device.

[0129] In an exemplary embodiment, the uplink signal is sent via a schedulable channel or signal of any cell connected to the terminal.

[0130] In S520, a synchronization information block sent on demand is received according to the indication signal.

[0131] In an exemplary embodiment, the method is performed by a terminal connected to a primary cell and a secondary cell. Receiving the synchronization information block sent on demand according to the indication signal includes: receiving the synchronization information block sent on demand on the secondary cell according to the indication signal.

[0132] In an exemplary embodiment, the method further comprises receiving first configuration information, the first configuration information comprising first synchronization information block parameters.

[0133] In an exemplary embodiment, when the first configuration information includes multiple sets of first synchronization information block parameters, the indication signal includes first indication information, where the first indication information is used to indicate the first synchronization information block parameters to be used. Receiving the synchronization information block sent on demand according to the indication signal includes: after receiving the indication signal, detecting the synchronization information block sent on demand according to the first synchronization information block parameters indicated by the first indication information in the indication signal.

[0134] In an exemplary embodiment, if the first configuration information is received before the indication signal is received, then after the indication signal is received, the synchronization information block sent on demand is detected according to the first configuration information.

[0135] In an exemplary embodiment, if the first configuration information is received after receiving the indication signal, then the synchronization information block sent on demand is received according to the indication signal, including: after receiving the indication signal and before receiving the first configuration information, detecting the synchronization information block sent on demand according to a predetermined configuration; after receiving the indication signal and the first configuration information, detecting the synchronization information block sent on demand according to the first configuration information.

[0136] In an exemplary embodiment, the first configuration information is included in radio resource control signaling or medium access control layer control element signaling.

[0137] In an exemplary embodiment, the method is performed by a terminal, and the terminal is connected to a primary cell and a secondary cell. Receiving the first configuration information includes: receiving the first configuration information on the primary cell or on the secondary cell.

[0138] In an exemplary embodiment, the method further includes receiving second configuration information, the second configuration information including second synchronization information block parameters. Receiving the on-demand synchronization information block according to the indication signal includes, after receiving the indication signal and the second configuration information, detecting the on-demand synchronization information block according to the second configuration information.

[0139] In an exemplary embodiment, the method is performed by a terminal, and when the terminal is connected to multiple cells, the indication signal includes second indication information, where the second indication information is used to indicate a cell for triggering on-demand transmission of a synchronization information block. Receiving the on-demand synchronization information block according to the indication signal includes: receiving the on-demand synchronization information block on the cell indicated by the second indication information.

[0140] In an exemplary embodiment, the method further includes: receiving a termination signal, the termination signal being used to indicate termination of on-demand triggered synchronization information block transmission; and stopping detecting synchronization information blocks according to the termination signal.

[0141] In an exemplary embodiment, the termination signal is included in downlink control signaling or media access control layer control element signaling.

[0142] In an exemplary embodiment, the indication signal and the termination signal are included in a first field of downlink control signaling or media access control layer control element signaling, a first value of the first field is used to indicate the indication signal, and a second value is used to indicate the termination signal.

[0143] In an exemplary embodiment, a second field is included in downlink control signaling or media access control layer control element signaling, and the second field is used to indicate the termination signal.

[0144] In an exemplary embodiment, the method is performed by a terminal, and when the terminal is connected to multiple cells, the termination signal includes third indication information, where the third indication information is used to indicate a cell for terminating on-demand triggered transmission of synchronization information blocks. Stopping detection of synchronization information blocks in accordance with the termination signal includes stopping detection of synchronization information blocks in the cell indicated by the third indication information.

[0145] In an exemplary embodiment, the method is performed by a terminal, and the terminal is connected to a primary cell and a secondary cell. Receiving a termination signal includes: receiving the termination signal on the primary cell or on the secondary cell.

[0146] Figure 6 A flowchart of another method for transmitting a synchronization information block in an embodiment of the present disclosure is shown. Figure 6 The embodiment can be executed by a terminal. Figure 6 As shown, the method provided by the embodiment of the present disclosure may include the following steps.

[0147] In S610, the SSB configuration sent by the base station is received at any time, such as the first configuration information mentioned above. Optionally, the second configuration information may be received after the first configuration information is received.

[0148] In S620, a trigger signaling is received, where the trigger signaling may be the above-mentioned indication signal.

[0149] In S630, the SSB signal is monitored at the corresponding position according to the trigger signaling and configuration.

[0150] The configuration in S630 may be the SSB configuration in S610, such as the first configuration information. The terminal may determine the corresponding location according to the first configuration information and monitor the SSB signal at the corresponding location.

[0151] In S640, the SSB signal is monitored at the corresponding position according to the trigger signaling and configuration.

[0152] If the terminal receives the second configuration information after receiving the first configuration information, then in S640, a new corresponding position can be determined according to the second configuration information, and the SSB signal can be monitored at the new corresponding position.

[0153] In S650, upon receiving the SSB termination signaling, the SSB detection is stopped.

[0154] If the terminal receives a termination signal / SSB termination signaling sent by the base station, it stops detecting SSB.

[0155] The method provided by the embodiment of the present disclosure can be applied to single-carrier or multi-carrier scenarios, and can reduce base station energy consumption by mobilizing the SSB signal transmission on a certain carrier on demand.

[0156] Figure 7 A flowchart of another method for transmitting a synchronization information block in an embodiment of the present disclosure is shown. Figure 7 The embodiment shows a multi-carrier (cell) scenario where the terminal establishes connections with the primary cell and the secondary cell at the same time. The secondary cell has been activated and the terminal accesses the secondary cell, but no SSB is sent. The sending and termination of the SSB of the secondary cell is triggered by downlink signaling. Figure 7 As shown, the method provided by the embodiment of the present disclosure may include the following steps.

[0157] For example, it is assumed that the terminal simultaneously establishes connections with the primary cell PCell A and the secondary cell SCell B. The secondary cell SCell B has been activated and the terminal is connected to SCell B, but no SSB is currently being sent.

[0158] In S11, the base station sends the SSB configuration information of the secondary cell through the primary cell / secondary cell.

[0159] The base station sends the SSB configuration information (e.g., first configuration information) of SCell B to the terminal through PCell A / SCell B. The SSB configuration information may include, for example, one or more of the SSB transmission cycle length (e.g., first cycle length), resource location (e.g., first time-frequency resource location), number of SSBs planned to be sent (e.g., first number of SSBs), time information, etc.

[0160] In S12, the base station sends a downlink trigger instruction / signaling through the primary cell / secondary cell.

[0161] The base station sends a downlink trigger instruction / indication signal to the terminal through PCell A / SCell B, instructing the terminal to monitor the SSB of SCell B at a specified location according to the configuration. The configuration here can be, for example, the first configuration information described above. The specified location here can be determined by one or more of the first cycle length, the first time-frequency resource location, the first number of SSBs, and the time information in the first configuration information.

[0162] In S13, the base station sends the SSB on demand through the secondary cell.

[0163] In S14, the terminal monitors the SSB of the secondary cell at a designated location.

[0164] In S15 , the base station determines that the transmission of the SSB on the secondary cell can be terminated early.

[0165] In S16, the base station sends SSB termination signaling on the DCI / MAC CE of the primary cell / secondary cell.

[0166] If the base station believes that the transmission of SSB on SCell B can be terminated in advance, SSB termination signaling / termination signal / termination signaling can be sent on the DCI / MAC CE of SCell B.

[0167] In S17 , the terminal stops detecting the SSB on the secondary cell.

[0168] After receiving the termination signaling, the terminal stops detecting the SSB on SCell B.

[0169] Figure 8 A flowchart of another method for transmitting a synchronization information block in an embodiment of the present disclosure is shown. Figure 8 The embodiment is a multi-carrier (cell) scenario where the terminal establishes connections with the primary cell and the secondary cell at the same time, the secondary cell has been activated and the terminal accesses the secondary cell, and when the secondary cell carrier has a long period (e.g. 160ms) of SSB transmission, the SSB transmission and termination of the secondary cell are triggered by downlink signaling. The long period here refers to a relative term, for example, greater than 20ms can be considered a long period, but the present disclosure is not limited to this. Figure 8 As shown, the method provided by the embodiment of the present disclosure may include the following steps.

[0170] In S21, the base station sends SSB to the terminal in the secondary cell with a period of 160 ms.

[0171] For example, assume that the terminal simultaneously establishes connections with the primary cell PCell A and the secondary cell SCell B. The secondary cell SCell B has been activated and the terminal accesses SCell B, and SCell B sends SSBs at a period of 160 ms.

[0172] In S22, the terminal monitors the SSB on the secondary cell at a period of 160ms.

[0173] In S23, the base station transmits SSB configuration information of the secondary cell via the primary cell / secondary cell. The SSB configuration information may be, for example, the first configuration information described above. The first configuration information may, for example, configure one or more of a predetermined period, a predetermined position / designated position, and a predetermined number of on-demand SSB transmissions. The predetermined period may be, for example, the length of the first period described above, the predetermined position / designated position may be, for example, the first time-frequency resource position described above, and the predetermined number may be, for example, the first number of SSBs described above.

[0174] In an exemplary embodiment, the predetermined period may be smaller than the long period. For example, it is assumed that the predetermined period is 20 ms, but the present disclosure is not limited thereto.

[0175] In S24, the base station sends a downlink trigger instruction / signaling via the primary cell / secondary cell. The downlink trigger instruction / signaling may be, for example, the above-mentioned indication signal.

[0176] For example, the base station sends a downlink trigger instruction to the terminal through PCell A / SCell B, instructing the terminal to perform SSB detection at a predetermined position according to a predetermined 20ms period.

[0177] In S25 , the base station sends the SSB on demand through the secondary cell.

[0178] For example, the base station sends a predetermined number of SSB signals on the SCell Bell according to a predetermined number.

[0179] In S26 , the terminal monitors the SSB of the secondary cell at a designated location.

[0180] In S27, after the on-demand triggered SSB signal is sent, the base station still sends the SSB in the secondary cell with a period of 160ms.

[0181] In S28, the terminal continues to monitor the SSB on the secondary cell at a period of 160ms.

[0182] For example, after the triggered SSB signal is sent, SCell B still sends SSB at a period of 160ms, and the terminal also performs SSB detection at a period of 160ms.

[0183] For multi-carrier scenarios, regardless of whether the secondary cell has SSB transmission, the method provided in the embodiment of the present disclosure can be used to implement on-demand transmission of SSB, thereby achieving network energy saving.

[0184] Figure 9 A flowchart of another method for transmitting a synchronization information block in an embodiment of the present disclosure is shown. Figure 9 In the embodiment of the present invention, in a single carrier (cell) scenario, the terminal only establishes a connection with cell A. When there is still a long period (160ms is used as an example here, but the present disclosure is not limited to this) of SSB transmission, one or more (several) SSBs are sent as needed. Figure 9 As shown, the method provided by the embodiment of the present disclosure may include the following steps.

[0185] In S31, the base station sends SSB to the terminal in cell A with a period of 160 ms.

[0186] For example, assume that the terminal only establishes a connection with cell A, and cell A sends SSB with a period of 160 ms.

[0187] In S32, the terminal monitors the SSB on cell A at a period of 160 ms.

[0188] In S33, the base station sends the SSB configuration information of cell A through cell A.

[0189] In S34, the base station sends a downlink trigger instruction / downlink trigger signaling / downlink signal through cell A.

[0190] For example, the base station sends a downlink trigger instruction to the terminal in cell A, instructing the terminal to perform SSB detection at a predetermined position according to a predetermined 20ms period.

[0191] In S35 , the base station sends SSB via cell A as needed.

[0192] For example, the base station sends a predetermined number of SSB signals on cell A according to a predetermined number.

[0193] In S36, the terminal monitors the SSB of cell A at the designated location.

[0194] In S37, after the on-demand triggered SSB signal is sent, the base station still sends SSB in cell A with a period of 160ms.

[0195] In S38, the terminal continues to monitor the SSB on cell A at a period of 160ms.

[0196] For example, after the triggered SSB signal is sent, cell A still sends SSB at a period of 160ms, and the terminal also performs SSB detection at a period of 160ms.

[0197] It should be noted that the above Figure 8 and Figure 9 In the process, the established SSB configuration (including period (e.g., established period), resource location (e.g., established location / specified location), number of transmissions (e.g., established number), etc.) can be pre-defined by default through the protocol, or can be configured in advance in the RRC parameters, for example, through the first configuration information.

[0198] above Figure 8 and Figure 9 In an embodiment, by realizing on-demand triggering of SSB transmission, a longer default period (such as 160ms in the above example) can be set, that is, when on-demand triggering is not performed, it is no longer necessary to send SSB every 20ms. When it is necessary to send according to a shorter period (such as the above 20ms), the signaling process of triggering on-demand sending of SSB can be used, thereby saving network energy consumption.

[0199] In other embodiments, when on-demand triggering is not performed, a shorter default period (e.g., 20ms) may be set. When on-demand triggering is performed, a longer period length (e.g., 160ms) may be set. When on-demand triggering is terminated, the SSB transmission and detection process continues according to the shorter default period, which can also save network energy consumption.

[0200] The disclosed embodiment provides a complete SSB on-demand transmission process, which directly reduces the number of SSB transmissions, thereby reducing network energy consumption. This process includes both the triggering and termination of the process.

[0201] In the disclosed embodiment, the SSB configuration information may be configured first, and then the on-demand SSB transmission may be triggered / terminated by downlink signaling. This pre-configuration method improves the efficiency of on-demand SSB transmission.

[0202] Based on the same inventive concept, the present disclosure also provides a network device, as described in the following embodiments. Since the principles of the network device embodiment to solve the problem are similar to those of the above method embodiment, the implementation of the network device embodiment can refer to the implementation of the above method embodiment, and the repeated parts will not be repeated.

[0203] Figure 10 FIG. 1 shows a structural block diagram of a network device according to an embodiment of the present disclosure. Figure 10 As shown, the network device 100 includes a transceiver unit 110. The transceiver unit 110 is configured to send an instruction signal to a terminal, wherein the instruction signal is used to instruct to trigger the transmission of one or more synchronization information blocks on demand. The transceiver unit 110 is also configured to send synchronization information blocks to the terminal on demand according to the instruction signal.

[0204] Based on the same inventive concept, the present disclosure also provides a terminal, as described in the following embodiments. Since the principle of solving the problem in the terminal embodiment is similar to that in the above method embodiment, the implementation of the terminal embodiment can refer to the implementation of the above method embodiment, and the repeated parts will not be repeated.

[0205] Figure 11 FIG. 1 shows a block diagram of a terminal in an embodiment of the present disclosure. Figure 11 As shown, the terminal 200 includes a transceiver unit 210. The transceiver unit 210 is configured to receive an indication signal, wherein the indication signal is used to indicate triggering the transmission of one or more synchronization information blocks on demand. The transceiver unit 210 is also configured to receive synchronization information blocks sent on demand according to the indication signal.

[0206] It should be noted that the above modules / units as part of the apparatus may be executed in a computer system such as a set of computer executable instructions.

[0207] Those skilled in the art will appreciate that various aspects of the present disclosure may be implemented as systems, methods, or program products. Therefore, various aspects of the present disclosure may be implemented in the following forms: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or a combination of hardware and software implementations, which may be collectively referred to herein as "circuits," "modules," or "systems."

[0208] Refer to the following Figure 12 The communication device 1000 according to this embodiment of the present disclosure will be described. Figure 12 The communication device 1000 shown is merely an example and should not limit the functionality and scope of use of the embodiments of the present disclosure.

[0209] like Figure 12As shown, the communication device 1000 is implemented as a general-purpose computing device. Components of the communication device 1000 may include, but are not limited to, at least one processing unit 1010, at least one storage unit 1020, and a bus 1030 connecting various system components (including the storage unit 1020 and the processing unit 1010).

[0210] The storage unit 1020 stores program codes, which can be executed by the processing unit 1010, so that the processing unit 1010 performs the steps described in the above “Exemplary Method” section of this specification according to various exemplary embodiments of the present disclosure.

[0211] In some embodiments, when the above-mentioned communication device 1000 is a terminal, the processing unit 1010 can execute the following steps of the above-mentioned method embodiment: receiving an indication signal, wherein the indication signal is used to indicate the on-demand triggering of the transmission of one or more synchronization information blocks; and receiving the synchronization information blocks sent on demand according to the indication signal.

[0212] In some embodiments, when the above-mentioned communication device 1000 is a network device, the processing unit 1010 can execute the following steps of the above-mentioned method embodiment: sending an indication signal to the terminal, wherein the indication signal is used to indicate the on-demand triggering of the transmission of one or more synchronization information blocks; and sending synchronization information blocks to the terminal on demand according to the indication signal.

[0213] The storage unit 1020 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 10201 and / or a cache memory unit 10202 , and may further include a read-only memory unit (ROM) 10203 .

[0214] The storage unit 1020 may also include a program / utility 10204 having a set (at least one) of program modules 10205, such program modules 10205 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0215] Bus 1030 may represent one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0216] The communication device 1000 can also communicate with one or more external devices 1040 (e.g., a keyboard, a pointing device, a Bluetooth device, etc.), one or more devices that enable a user to interact with the communication device 1000, and / or any device that enables the communication device 1000 to communicate with one or more other computing devices (e.g., a router, a modem, etc.). Such communication can occur via an input / output (I / O) interface 1050. Furthermore, the communication device 1000 can communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network such as the Internet) via a network adapter 1060. As shown, the network adapter 1060 communicates with the other modules of the communication device 1000 via the bus 1030. It should be understood that, although not shown, other hardware and / or software modules can be used in conjunction with the communication device 1000, including but not limited to microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0217] Through the description of the above embodiments, it is easy for those skilled in the art to understand that the example embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solution according to the embodiments of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the embodiments of the present disclosure.

[0218] In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart may be implemented as a computer program product, which includes: a computer program, which implements the above-mentioned method for transmitting synchronization information blocks when executed by a processor.

[0219] In an exemplary embodiment of the present disclosure, a computer-readable storage medium is further provided. The computer-readable storage medium may be a readable signal medium or a readable storage medium. Figure 13 A schematic diagram of a computer-readable storage medium according to an embodiment of the present disclosure is shown. Figure 13 As shown, the computer-readable storage medium 1100 stores a program product capable of implementing the above-mentioned method of the present disclosure. In some possible implementations, various aspects of the present disclosure may also be implemented in the form of a program product, which includes program code. When the program product is executed on a terminal / network device, the program code is used to cause the terminal / network device to execute the steps according to various exemplary embodiments of the present disclosure described in the "Exemplary Methods" section above.

[0220] More specific examples of computer-readable storage media in the present disclosure may include, but are not limited to, an electrical connection having one or more conductors, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), optical fibers, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0221] In the present disclosure, a computer-readable storage medium may include a data signal propagated in baseband or as part of a carrier wave, which carries readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium that can transmit, propagate, or transfer a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0222] Alternatively, the program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination thereof.

[0223] In a specific implementation, the program code for performing the operations of the present disclosure may be written in any combination of one or more programming languages, including object-oriented programming languages such as Java, C++, and the like, as well as conventional procedural programming languages such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a standalone software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0224] It should be noted that although several modules or units of the device for action execution are mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more modules or units described above can be concretized in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided into multiple modules or units to be concretized.

[0225] Furthermore, although the steps of the method of the present disclosure are described in a particular order in the accompanying drawings, this does not require or imply that the steps must be performed in this particular order, or that all steps shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps.

[0226] Through the description of the above embodiments, it is easy for those skilled in the art to understand that the example embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solution according to the embodiments of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a mobile terminal, or a network device, etc.) to execute the method according to the embodiments of the present disclosure.

[0227] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

Claims

1. A method for transmitting a synchronization information block, characterized in that: include: Sending an indication signal to the terminal, where the indication signal is used to indicate triggering the transmission of one or more synchronization information blocks on demand; Sending a synchronization information block to the terminal as needed according to the indication signal.

2. The method according to claim 1, characterized in that The terminal is connected to a primary cell and a secondary cell; wherein sending an indication signal to the terminal includes: The indication signal is sent on the primary cell or on the secondary cell.

3. The method according to claim 2, characterized in that Before the indication signal is sent to the terminal, the secondary cell has been activated and the terminal has accessed the secondary cell, and no synchronization information block is sent on the secondary cell.

4. The method according to claim 1, wherein The terminal is connected to a primary cell and a secondary cell; wherein sending a synchronization information block to the terminal on demand according to the indication signal comprises: According to the indication signal, a synchronization information block is sent to the terminal on demand in the secondary cell.

5. The method according to claim 1, wherein Also includes: First configuration information is sent to the terminal, where the first configuration information includes first synchronization information block parameters.

6. The method according to claim 5, characterized in that The first synchronization information block parameter includes a first cycle length of a synchronization information block.

7. The method according to claim 5, characterized in that The first synchronization information block parameter includes a first time-frequency resource position of the synchronization information block.

8. The method according to claim 5, characterized in that The first synchronization information block parameter includes the number of first synchronization information blocks planned to be sent.

9. The method according to claim 5, characterized in that The first synchronization information block parameter includes time information of the synchronization information block.

10. The method according to claim 5, characterized in that When the first configuration information includes multiple sets of first synchronization information block parameters, the indication signal includes first indication information, and the first indication information is used to indicate the adopted first synchronization information block parameters.

11. The method according to claim 5, characterized in that If the first configuration information is sent to the terminal before the indication signal is sent to the terminal, then after the indication signal is sent to the terminal, a synchronization information block is sent to the terminal as needed according to the first configuration information.

12. The method according to claim 5, characterized in that The first configuration information includes the indication signal.

13. The method according to claim 5, characterized in that If the first configuration information is sent to the terminal after the instruction signal is sent to the terminal, sending a synchronization information block to the terminal as needed according to the instruction signal includes: After sending the indication signal to the terminal and before sending the first configuration information to the terminal, sending a synchronization information block to the terminal as needed according to a predetermined configuration; After sending the indication signal and the first configuration information to the terminal, a synchronization information block is sent to the terminal as needed according to the first configuration information.

14. The method according to claim 5, characterized in that The first configuration information is included in radio resource control signaling or medium access control layer control element signaling.

15. The method according to claim 5, characterized in that The terminal is connected to a primary cell and a secondary cell; wherein sending first configuration information to the terminal includes: The first configuration information is sent on the primary cell or on the secondary cell.

16. The method according to claim 5, characterized in that Also includes: Sending second configuration information to the terminal, where the second configuration information includes second synchronization information block parameters; The step of sending a synchronization information block to the terminal as needed according to the indication signal includes: After sending the indication signal and the second configuration information to the terminal, a synchronization information block is sent to the terminal as needed according to the second configuration information.

17. The method according to claim 1, wherein The indication signal is included in downlink control signaling or media access control layer control element signaling.

18. The method according to claim 1, wherein When the terminal is connected to multiple cells, the indication signal includes second indication information, where the second indication information is used to indicate the cell for sending the synchronization information block triggered on demand.

19. The method according to claim 1, wherein Also includes: Sending a termination signal to the terminal, where the termination signal is used to indicate termination of on-demand triggered synchronization information block transmission; Stop sending synchronization information blocks to the terminal on demand according to the termination signal.

20. The method according to claim 19, characterized in that The termination signal is included in downlink control signaling or media access control layer control element signaling.

21. The method according to claim 20, characterized in that The indication signal and the termination signal are included in a first field of downlink control signaling or media access control layer control element signaling, a first value of the first field is used to indicate the indication signal, and a second value is used to indicate the termination signal.

22. The method according to claim 20, characterized in that The downlink control signaling or the media access control layer control element signaling includes a second field, and the second field is used to indicate the termination signal.

23. The method according to claim 19, wherein When the terminal is connected to multiple cells, the termination signal includes third indication information, where the third indication information is used to indicate a cell for terminating the sending of the on-demand triggered synchronization information block.

24. The method according to claim 19, wherein The terminal is connected to a primary cell and a secondary cell; wherein sending a termination signal to the terminal includes: The termination signal is sent on the primary cell or on the secondary cell.

25. The method according to claim 1, wherein Also includes: receiving an uplink signal from a terminal; and determining whether to send the indication signal to the terminal according to the uplink signal.

26. A method for transmitting a synchronization information block, characterized in that: include: receiving an indication signal, the indication signal being used to indicate triggering transmission of one or more synchronization information blocks on demand; A synchronization information block sent on demand is received according to the indication signal.

27. The method according to claim 26, characterized in that The method is performed by a terminal connected to a primary cell and a secondary cell; wherein receiving an indication signal includes: The indication signal is received on the primary cell or the secondary cell.

28. The method according to claim 27, characterized in that Before receiving the indication signal, the secondary cell has been activated and the terminal has accessed the secondary cell, and has not received a synchronization information block on the secondary cell.

29. The method according to claim 26, wherein The method is performed by a terminal connected to a primary cell and a secondary cell; wherein receiving a synchronization information block sent on demand according to the indication signal includes: According to the indication signal, a synchronization information block sent on demand is received on the secondary cell.

30. The method according to claim 26, wherein Also includes: First configuration information is received, where the first configuration information includes first synchronization information block parameters.

31. The method according to claim 30, wherein When the first configuration information includes multiple sets of first synchronization information block parameters, the indication signal includes first indication information, where the first indication information is used to indicate the adopted first synchronization information block parameters; The step of receiving a synchronization information block sent on demand according to the indication signal includes: After receiving the indication signal, the synchronization information block sent on demand is detected according to the first synchronization information block parameter indicated by the first indication information in the indication signal.

32. The method according to claim 30, wherein If the first configuration information is received before the indication signal is received, then after the indication signal is received, the synchronization information block sent on demand is detected according to the first configuration information.

33. The method according to claim 30, wherein If the first configuration information is received after the indication signal is received, receiving the synchronization information block sent on demand according to the indication signal includes: After receiving the indication signal and before receiving the first configuration information, detecting a synchronization information block sent on demand according to a predetermined configuration; After receiving the indication signal and the first configuration information, the synchronization information block sent on demand is detected according to the first configuration information.

34. The method according to claim 30, wherein The first configuration information is included in radio resource control signaling or medium access control layer control element signaling.

35. The method according to claim 30, wherein The method is performed by a terminal, which is connected to a primary cell and a secondary cell; wherein receiving first configuration information includes: The first configuration information is received on the primary cell or on the secondary cell.

36. The method according to claim 30, wherein Also includes: receiving second configuration information, wherein the second configuration information includes second synchronization information block parameters; The step of receiving a synchronization information block sent on demand according to the indication signal includes: After receiving the indication signal and the second configuration information, the synchronization information block sent on demand is detected according to the second configuration information.

37. The method according to claim 26, wherein The indication signal is included in downlink control signaling or media access control layer control element signaling.

38. The method according to claim 26, wherein The method is performed by a terminal, and when the terminal is connected to multiple cells, the indication signal includes second indication information, where the second indication information is used to indicate a cell for sending a synchronization information block triggered on demand; The step of receiving a synchronization information block sent on demand according to the indication signal includes: Receive the synchronization information block sent on demand in the cell indicated by the second indication information.

39. The method according to claim 26, wherein Also includes: receiving a termination signal, the termination signal being used to indicate termination of on-demand triggered synchronization information block transmission; The detection of the synchronization information block is stopped according to the termination signal.

40. The method according to claim 39, wherein The termination signal is included in downlink control signaling or media access control layer control element signaling.

41. The method according to claim 40, wherein The indication signal and the termination signal are included in a first field of downlink control signaling or media access control layer control element signaling, a first value of the first field is used to indicate the indication signal, and a second value is used to indicate the termination signal.

42. The method according to claim 40, wherein The downlink control signaling or the media access control layer control element signaling includes a second field, and the second field is used to indicate the termination signal.

43. The method according to claim 39, wherein The method is performed by a terminal, and when the terminal is connected to multiple cells, the termination signal includes third indication information, where the third indication information is used to indicate a cell for terminating the sending of the on-demand triggered synchronization information block; The step of stopping detecting the synchronization information block according to the termination signal includes: Stop detecting the synchronization information block on the cell indicated by the third indication information.

44. The method according to claim 39, wherein The method is performed by a terminal, which is connected to a primary cell and a secondary cell; wherein receiving a termination signal includes: The termination signal is received on the primary cell or on the secondary cell.

45. The method according to claim 26, wherein The method is executed by a terminal, and further includes: Sends an uplink signal to network devices.

46. The method according to claim 45, characterized in that The uplink signal is sent via a schedulable channel or signal of any cell connected to the terminal.

47. A network device, characterized in that include: a transceiver unit, configured to send an indication signal to the terminal, wherein the indication signal is used to indicate triggering the transmission of one or more synchronization information blocks on demand; The transceiver unit is further configured to send a synchronization information block to the terminal as needed according to the indication signal.

48. A terminal, characterized in that: include: a transceiver unit, configured to receive an indication signal, wherein the indication signal is used to indicate triggering the transmission of one or more synchronization information blocks on demand; The transceiver unit is further configured to receive a synchronization information block sent on demand according to the indication signal.

49. A communication system, characterized in that include: The network device according to claim 47 and the terminal according to claim 48.

50. A communication device, characterized in that include: processor; as well as a memory for storing executable instructions of the processor; The processor is configured to execute the method of any one of claims 1 to 25, or the method of any one of claims 26 to 46, by executing the executable instructions.

51. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it implements the method according to any one of claims 1 to 25, or implements the method according to any one of claims 26 to 46.

52. A computer program product comprising a computer program, wherein when the computer program is executed, the method according to any one of claims 1 to 25 is executed, or the method according to any one of claims 26 to 46 is executed.

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