Communication method, device and system and storage medium

Abstract

The invention provides a communication method, device and system and a storage medium, and aims to improve the utilization rate of network resources or improve the stability of network connection. The communication method comprises the steps that first indication information is sent, the first indication information is used for indicating a target transmission mode of a synchronization signal block, the target transmission mode comprises any one of multiple transmission modes, and the periods of the synchronization signal block corresponding to the transmission modes are different; and receiving the synchronization signal block, wherein the synchronization signal block is transmitted based on the target transmission mode. In the implementation scheme, the terminal equipment can inform the network equipment of the requirement of the terminal equipment for the synchronization signal block through the first indication information, so that the network equipment can dynamically adjust the parameter when the synchronization signal block is sent based on the requirement of the terminal equipment for the synchronization signal block; and the requirements of the network in different load states can be flexibly met, so that the utilization rate of network resources or the stability of network connection is improved.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a communication method, apparatus, system, and storage medium. Background Art

[0002] With the rapid development of communication technologies, the communication network architecture is gradually evolving towards high density and complexity, and network energy consumption and synchronization signal transmission efficiency have become important factors restricting the development of communication technologies. As a core signaling for a terminal device to achieve cell search, time synchronization, frequency synchronization, and cell selection, the transmission mechanism of a synchronization signal block (SSB) directly affects network energy efficiency and connection performance.

[0003] However, currently, synchronization signal blocks usually use fixed parameters for broadcasting, and synchronization signal blocks using fixed-parameter broadcasting may fail to flexibly adapt to the requirements of the network under different load states, thereby resulting in low network resource utilization or poor network connection stability. Summary of the Invention

[0004] This application provides a communication method, apparatus, system, and storage medium, aiming to improve network resource utilization or network connection stability.

[0005] To achieve the above objective, this application provides the following technical solutions: In a first aspect of this application, a communication method is provided. This method can be applied to a terminal device. For example, the terminal device can be a communication device, or the terminal device can be a part of a communication device (such as a processor or circuit or chip or chip system responsible for communication functions), or the terminal device can also be a logic module or software capable of implementing all or part of the communication device functions. The following takes the terminal device as an example for illustration. In this method, the terminal device sends first indication information, where the first indication information is used to indicate a target transmission mode of a synchronization signal block, and the target transmission mode includes any one of multiple transmission modes. The parameters corresponding to the multiple transmission modes include the period of the synchronization signal block, and the periods of the synchronization signal blocks corresponding to each transmission mode are different; the terminal device receives the synchronization signal block, and the synchronization signal block is sent based on the target transmission mode.

[0006] In the above implementation solution, the terminal device can request the target transmission mode of the synchronization signal block from the network device through the first indication information, that is, the terminal device can inform the network device of the requirements for the synchronization signal block through the first indication information, so that the network device can transmit the synchronization signal block based on the parameters corresponding to the target transmission mode. For example, the synchronization signal block can be transmitted based on the period corresponding to the target transmission mode, that is, the network device can dynamically adjust the parameters when transmitting the synchronization signal block based on the requirements of the terminal device for the synchronization signal block. Compared with the prior art in which the synchronization signal block is broadcast with fixed parameters, it can flexibly adapt to the requirements of the network in different load states, thereby improving the network resource utilization rate or improving the network connection stability.

[0007] In a possible implementation manner of the first aspect of the present application, the multiple transmission modes include at least one of a first transmission mode, a second transmission mode, a third transmission mode, or a fourth transmission mode. The period of the synchronization signal block corresponding to the first transmission mode is less than the period of the synchronization signal block corresponding to the second transmission mode. The period of the synchronization signal block corresponding to the second transmission mode is less than the period of the synchronization signal block corresponding to the third transmission mode. The period of the synchronization signal block corresponding to the third transmission mode is less than the period of the synchronization signal block corresponding to the fourth transmission mode. In the above implementation solution, multiple transmission modes of the synchronization signal block can be determined first based on the value range of the parameters used when transmitting the synchronization signal block. For example, a first transmission mode, a second transmission mode, a third transmission mode, and a fourth transmission mode can be determined, and the parameters corresponding to each transmission mode are different. That is, when the synchronization signal block is transmitted using different transmission modes, different parameters can be used. Specifically, the parameters corresponding to the transmission mode can include a period, that is, the transmission period of the synchronization signal block, and it can be set that the period corresponding to the first transmission mode is less than the period corresponding to the second transmission mode, the period corresponding to the second transmission mode is less than the period corresponding to the third transmission mode, and the period corresponding to the third transmission mode is less than the period corresponding to the fourth transmission mode.

[0008] In a possible implementation manner of the first aspect of the present application, the parameters corresponding to multiple transmission modes further include at least one of the number of bursts of the synchronization signal block or the downlink transmission power of the synchronization signal block. The number of bursts of the synchronization signal block and the number of bursts of the synchronization signal block corresponding to each transmission mode are different; the number of bursts of the synchronization signal block corresponding to the first transmission mode is greater than the number of bursts of the synchronization signal block corresponding to the second transmission mode, the number of bursts of the synchronization signal block corresponding to the second transmission mode is greater than the number of bursts of the synchronization signal block corresponding to the third transmission mode, and the number of bursts of the synchronization signal block corresponding to the third transmission mode is greater than the number of bursts of the synchronization signal block corresponding to the fourth transmission mode; the downlink transmission power of the synchronization signal block corresponding to the first transmission mode is greater than the downlink transmission power of the synchronization signal block corresponding to the second transmission mode, the downlink transmission power of the synchronization signal block corresponding to the second transmission mode is greater than the downlink transmission power of the synchronization signal block corresponding to the third transmission mode, and the downlink transmission power of the synchronization signal block corresponding to the third transmission mode is greater than the downlink transmission power of the synchronization signal block corresponding to the fourth transmission mode. In the above implementation solution, in addition to configuring the corresponding period of the synchronization signal block for different transmission modes respectively, at least one of the number of bursts of the synchronization signal block or the downlink power of the synchronization signal block corresponding to different transmission modes can be configured respectively, so that the network device can not only dynamically adjust the transmission period of the synchronization signal block according to the requirements of the synchronization signal block, but also dynamically adjust the number of bursts and the downlink power of the synchronization signal block according to the requirements of the synchronization signal block. Compared with the prior art that broadcasts the synchronization signal block with fixed parameters, it can flexibly adapt to the requirements of the network in different load states, thereby improving the network resource utilization rate or improving the network connection stability.

[0009] In a possible implementation manner of the first aspect of the present application, the first indication information is indicated by the first preamble, and the first preamble is determined based on the first indication information. In the above implementation solution, after the terminal device determines the first indication information for indicating the target transmission mode, it can further determine the first preamble based on the first indication information, and finally send the first preamble determined based on the first indication information to the network device, so that the network device can determine the first indication information for indicating the target transmission mode based on the first preamble, so that the network device can transmit the synchronization signal block based on the parameters corresponding to the target transmission mode. For example, the synchronization signal block can be transmitted based on the period corresponding to the target transmission mode, that is, the network device can dynamically adjust the parameters when transmitting the synchronization signal block according to the requirements of the terminal device for the synchronization signal block. Compared with the prior art that broadcasts the synchronization signal block with fixed parameters, it can flexibly adapt to the requirements of the network in different load states, thereby improving the network resource utilization rate or improving the network connection stability.

[0010] In a possible implementation manner of the first aspect of the present application, the first preamble is determined based on at least one of a pattern phase offset, a root index, or a cyclic shift step size, and at least one of the pattern phase offset, the root index, or the cyclic shift step size is determined based on first indication information. In the above implementation solution, the generation formula of the first preamble may include at least one of a pattern phase offset, a root index, or a cyclic shift step size. After determining the first indication information for indicating the target transmission mode, the terminal device may construct at least one of a pattern phase offset, a root index, or a cyclic shift step size based on the first indication information, and then further determine the first preamble based on at least one of the pattern phase offset, the root index, or the cyclic shift step size, so that the generated first preamble can accurately indicate the first indication information, and as much as possible avoid the network device misdetecting the first preamble after receiving it, that is, it can enable the network device to accurately determine the target transmission mode requested by the terminal device based on the first preamble.

[0011] In a possible implementation manner of the first aspect of the present application, the target transmission mode is determined based on one or more candidate transmission modes, and the one or more candidate transmission modes include at least one of a first candidate transmission mode, a second candidate transmission mode, a third candidate transmission mode, a fourth candidate transmission mode, or a fifth candidate transmission mode; the first candidate transmission mode is determined based on the Doppler frequency shift of the reference signal, the second candidate transmission mode is determined based on at least one of the reference signal received power or the reference signal received quality, the third candidate transmission mode is determined based on the neighbor cell interference strength value, the fourth candidate transmission mode is determined based on the data transmission rate, the fifth candidate transmission mode is determined based on the quality of service marking, and the first candidate transmission mode, the second candidate transmission mode, the third candidate transmission mode, the fourth candidate transmission mode, and the fifth candidate transmission mode respectively include any one of a first transmission mode, a second transmission mode, a third transmission mode, or a fourth transmission mode. In the above implementation solution, when determining the target transmission mode of the synchronization signal block, the terminal device may first determine the candidate transmission modes corresponding to different conditions from the first transmission mode, the second transmission mode, the third transmission mode, or the fourth transmission mode respectively based on different conditions. For example, the terminal device may determine the first candidate transmission mode based on the monitored Doppler frequency shift of the reference signal, determine the second candidate transmission mode based on at least one of the monitored reference signal received power or the reference signal received quality, determine the third candidate transmission mode based on the monitored neighbor cell interference strength value, determine the fourth candidate transmission mode based on the monitored data transmission rate, and determine the fifth candidate transmission mode based on the monitored quality of service marking. Then, the target transmission mode is further determined based on one or more candidate transmission modes, so that the network device can transmit the synchronization signal block based on the parameters corresponding to the target transmission mode. For example, the synchronization signal block can be transmitted based on the period corresponding to the target transmission mode, that is, the network device can dynamically adjust the parameters when transmitting the synchronization signal block based on the requirements of the terminal device for the synchronization signal block. Compared with the prior art of broadcasting the synchronization signal block with fixed parameters, it can flexibly adapt to the requirements of the network in different load states, thereby improving the network resource utilization rate or improving the network connection stability.

[0012] In a possible implementation manner of the first aspect of the present application, when the target transmission mode is determined based on multiple candidate transmission modes, the target transmission mode is determined based on multiple candidate transmission modes and the priority corresponding to each candidate transmission mode among the multiple candidate transmission modes; or, the target transmission mode is determined based on multiple candidate transmission modes and the weight value corresponding to each candidate transmission mode among the multiple candidate transmission modes. In the above implementation solution, the corresponding priority or weight value can be set in advance for each candidate transmission mode determined based on different conditions, so that after multiple candidate transmission modes are determined, the target transmission mode can be further determined from the multiple candidate transmission modes based on the priority or weight value corresponding to each candidate transmission mode among the multiple candidate transmission modes, so that the network device can transmit the synchronization signal block based on the parameters corresponding to the target transmission mode. For example, the synchronization signal block can be transmitted based on the period corresponding to the target transmission mode, that is, the network device can dynamically adjust the parameters when transmitting the synchronization signal block based on the requirements of the terminal device for the synchronization signal block. Compared with the prior art in which the synchronization signal block is broadcast with fixed parameters, it can flexibly adapt to the requirements of the network in different load states, thereby improving network resource utilization or improving network connection stability.

[0013] In a possible implementation manner of the first aspect of the present application, before sending the first indication information, the method further includes: receiving first configuration information, where the first configuration information is used to configure at least one of multiple transmission modes of the synchronization signal block, parameters corresponding to the multiple transmission modes, or a preamble set; the parameters corresponding to the multiple transmission modes include at least one of the period of the synchronization signal block, the number of bursts of the synchronization signal block, or the downlink transmission power of the synchronization signal block; the preamble set includes a second preamble, and the second preamble is used to indicate a first mode index, and the first mode index is used to indicate the multiple transmission modes. In the above implementation solution, the network device can pre-configure multiple transmission modes of the synchronization signal block, parameters corresponding to each transmission mode, or a preamble set including the second preamble to the terminal device, so that the terminal device can determine the transmission modes that the network device can implement, the parameters corresponding to each transmission mode, and the second preamble corresponding to each transmission mode, so as to facilitate the terminal device to determine the target transmission mode of the synchronization signal block according to its own requirements and the parameters corresponding to each transmission mode, and inform the network device based on the preamble corresponding to the target transmission mode, so that the network device can transmit the synchronization signal block based on the parameters corresponding to the target transmission mode. For example, the synchronization signal block can be transmitted based on the period corresponding to the target transmission mode, that is, the network device can dynamically adjust the parameters when transmitting the synchronization signal block based on the requirements of the terminal device for the synchronization signal block. Compared with the prior art in which the synchronization signal block is broadcast with fixed parameters, it can flexibly adapt to the requirements of the network in different load states, thereby improving network resource utilization or improving network connection stability.

[0014] In a possible implementation manner of the first aspect of the present application, the parameters corresponding to multiple transmission modes further include at least one of the subcarrier spacing of the synchronization signal block, the physical cell identification information of the synchronization signal block, the identification information of the target cell, or the maximum duration of the transmission window, where the target cell is the cell corresponding to the terminal device. In the above implementation solution, the parameters corresponding to the transmission mode configured by the network device based on the first configuration information may further include at least one of the subcarrier spacing of the synchronization signal block, the physical cell identification information of the synchronization signal block, the identification information of the target cell, or the maximum duration of the transmission window, so that after the terminal device determines the target transmission mode of the synchronization signal block, it can accurately receive the synchronization signal block sent by the network device based on the parameters corresponding to the target transmission mode, thereby improving the network resource utilization rate or improving the network connection stability.

[0015] In a possible implementation manner of the first aspect of the present application, before receiving the synchronization signal block, the method further includes: receiving a first message, where the first message is used to indicate the activation of the target transmission mode, and the first message includes at least one of the first indication information, the identification information of the target cell, or the second indication information, and the second indication information is used to indicate the beam direction corresponding to the synchronization signal block. In the above implementation solution, before the terminal device sends the first indication information and receives the synchronization signal block, it may further receive the first message used to indicate the activation of the target transmission mode, so that the terminal device can determine that the network device can transmit the synchronization signal block based on the target transmission mode, and can further make preparations for receiving the synchronization signal block based on the target transmission mode based on the identification information of the target cell included in the first indication information or the second indication information used to indicate the beam direction corresponding to the synchronization signal block, so that the transmission of the synchronization signal block can flexibly adapt to the requirements of the network in different load states, thereby improving the network resource utilization rate or improving the network connection stability.

[0016] In a possible implementation manner of the first aspect of the present application, before sending the first indication information, the method further includes: sending a first request message for requesting a first resource, where the first indication information is sent based on the first resource; receiving third indication information for indicating the first resource. In the above implementation solution, before sending the first indication information, the terminal device may also first send a first request message to the network device to request the first resource required for sending the first indication information, so that after receiving the third indication information for indicating the first resource, the terminal device can request the target transmission mode of the synchronization signal block from the network device through the first indication information, that is, the terminal device can inform the network device of the terminal device's requirement for the synchronization signal block through the first indication information, so that the network device can transmit the synchronization signal block based on the parameters corresponding to the target transmission mode. For example, the synchronization signal block can be transmitted based on the period corresponding to the target transmission mode, that is, the network device can dynamically adjust the parameters when transmitting the synchronization signal block based on the terminal device's requirement for the synchronization signal block. Compared with the prior art in which the synchronization signal block is broadcast with fixed parameters, it can flexibly adapt to the requirements of the network in different load states, thereby improving the network resource utilization rate or improving the network connection stability.

[0017] The second aspect of the present application provides a method, which can be applied to a network device. For example, the network device can be a communication device, or the network device can be some components in the communication device (such as a processor or a circuit or a chip or a chip system responsible for the communication function), or the network device can also be a logic module or software that can implement all or part of the communication device functions. The following takes the network device as an example for illustration. In this method, the network device receives first indication information for indicating the target transmission mode of the synchronization signal block, and the target transmission mode is any one of multiple transmission modes. The parameters corresponding to the multiple transmission modes include the period of the synchronization signal block, and the period of the synchronization signal block corresponding to each transmission mode is different; the network device sends a synchronization signal block, and the synchronization signal block is sent based on the target transmission mode.

[0018] In the above implementation solution, the terminal device can request the target transmission mode of the synchronization signal block from the network device through the first indication information, that is, the terminal device can inform the network device of the terminal device's requirements for the synchronization signal block through the first indication information, so that the network device can transmit the synchronization signal block based on the parameters corresponding to the target transmission mode. For example, the synchronization signal block can be transmitted based on the period corresponding to the target transmission mode, that is, the network device can dynamically adjust the parameters when transmitting the synchronization signal block based on the terminal device's requirements for the synchronization signal block. Compared with the prior art in which the synchronization signal block is broadcast using fixed parameters, it can flexibly adapt to the requirements of the network in different load states, thereby improving network resource utilization or improving network connection stability.

[0019] In a possible implementation manner of the second aspect of the present application, the multiple transmission modes include at least one of a first transmission mode, a second transmission mode, a third transmission mode, or a fourth transmission mode. The period of the synchronization signal block corresponding to the first transmission mode is less than the period of the synchronization signal block corresponding to the second transmission mode. The period of the synchronization signal block corresponding to the second transmission mode is less than the period of the synchronization signal block corresponding to the third transmission mode. The period of the synchronization signal block corresponding to the third transmission mode is less than the period of the synchronization signal block corresponding to the fourth transmission mode.

[0020] In a possible implementation manner of the second aspect of the present application, the parameters corresponding to the multiple transmission modes further include at least one of the number of bursts of the synchronization signal block or the downlink transmission power of the synchronization signal block.

[0021] In a possible implementation manner of the second aspect of the present application, the first indication information is indicated by a first preamble, and the first preamble is determined based on the first indication information.

[0022] In a possible implementation manner of the second aspect of the present application, the first preamble is determined based on at least one of a mode phase offset, a root index, or a cyclic shift step size, and at least one of the mode phase offset, the root index, or the cyclic shift step size is determined based on the first indication information.

[0023] In a possible implementation manner of the second aspect of the present application, the target transmission mode is determined based on one or more candidate transmission modes, and the one or more candidate transmission modes include at least one of a first candidate transmission mode, a second candidate transmission mode, a third candidate transmission mode, a fourth candidate transmission mode, or a fifth candidate transmission mode; the first candidate transmission mode is determined based on the Doppler frequency shift of a reference signal, the second candidate transmission mode is determined based on at least one of the reference signal received power or the reference signal received quality, the third candidate transmission mode is determined based on the neighbor cell interference intensity value, the fourth candidate transmission mode is determined based on the data transmission rate, the fifth candidate transmission mode is determined based on the quality of service flag, and the first candidate transmission mode, the second candidate transmission mode, the third candidate transmission mode, the fourth candidate transmission mode, and the fifth candidate transmission mode each include any one of the first transmission mode, the second transmission mode, the third transmission mode, or the fourth transmission mode.

[0024] In a possible implementation manner of the second aspect of the present application, when the target transmission mode is determined based on multiple candidate transmission modes, the target transmission mode is determined based on the multiple candidate transmission modes and the priority corresponding to each candidate transmission mode in the multiple candidate transmission modes; or, the target transmission mode is determined based on the multiple candidate transmission modes and the weight value corresponding to each candidate transmission mode in the multiple candidate transmission modes.

[0025] In a possible implementation manner of the second aspect of the present application, before receiving the first indication information, the method further includes: sending first configuration information, where the first configuration information is used to configure at least one of multiple transmission modes of the synchronization signal block, parameters corresponding to the multiple transmission modes, or a preamble set; the parameters corresponding to the multiple transmission modes include at least one of the period of the synchronization signal block, the number of bursts of the synchronization signal block, or the downlink transmission power of the synchronization signal block; the preamble set includes a second preamble, the second preamble is used to indicate the first mode index, the second preamble is determined based on the first mode index, and the first mode index is used to indicate the multiple transmission modes.

[0026] In a possible implementation manner of the second aspect of the present application, the parameters corresponding to the multiple transmission modes further include at least one of the subcarrier spacing of the synchronization signal block, the physical cell identification information of the synchronization signal block, the identification information of the target cell, or the maximum duration of the transmission window, where the target cell is the cell corresponding to the terminal device.

[0027] In a possible implementation manner of the second aspect of the present application, before sending the synchronization signal block, the method further includes: sending a first message, where the first message is used to indicate the activation of the target transmission mode, and the first message includes at least one of the first indication information, the identification information of the target cell, or the second indication information, and the second indication information is used to indicate the beam direction corresponding to the synchronization signal block.

[0028] In a possible implementation manner of the second aspect of the present application, before receiving the first indication information, the method further includes: receiving a first request message, where the first request message is used to request a first resource, and the first indication information is sent based on the first resource; sending third indication information, where the third indication information is used to indicate the first resource.

[0029] A third aspect provides a communication device, including a processor. The processor is coupled to a memory and can be used to execute instructions or data in the memory to implement the method in any possible implementation manner of any of the above aspects. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface.

[0030] In one implementation manner, the communication interface may be a transceiver or an input / output interface.

[0031] In another implementation manner, the communication device is a chip configured in a terminal device. When the communication device is a chip configured in a terminal device, the communication interface may be an input / output interface.

[0032] A fourth aspect provides a communication device, including a processor. The processor is coupled to a memory and can be used to execute instructions or data in the memory to implement the method in any possible implementation manner of any of the above aspects. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface.

[0033] In one implementation manner, the communication interface may be a transceiver or an input / output interface.

[0034] In another implementation manner, the communication device is a chip configured in a satellite. When the communication device is a chip configured in a satellite, the communication interface may be an input / output interface.

[0035] A fifth aspect provides a processor, including: an input circuit, an output circuit, and a processing circuit. The processing circuit is used to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in any possible implementation manner of any aspect.

[0036] In the specific implementation process, the above-mentioned processor can be one or more chips, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be transistors, gate circuits, flip-flops, and various logic circuits, etc. The input signal received by the input circuit can be received and input by, for example, but not limited to, a receiver. The signal output by the output circuit can be output to, for example, but not limited to, a transmitter and transmitted by the transmitter. Moreover, the input circuit and the output circuit can be the same circuit, which is used as the input circuit and the output circuit at different times respectively. The embodiments of the present application do not limit the specific implementation manners of the processor and various circuits.

[0037] In a sixth aspect, a communication device is provided, including a processor and a memory. The processor is configured to read instructions stored in the memory, and can receive signals through a receiver and transmit signals through a transmitter to execute the method in any one of the possible implementation manners in any of the above aspects.

[0038] Optionally, the processor is one or more, and the memory is one or more.

[0039] In a seventh aspect, a computer program product is provided. The computer program product includes: a computer program (which can also be referred to as code or instructions). When the computer program is run, the computer is caused to execute the method in any one of the possible implementation manners in any of the above aspects.

[0040] In an eighth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores a computer program (which can also be referred to as code or instructions). When it runs on a computer, the computer is caused to execute the method in any one of the possible implementation manners in any of the above aspects.

[0041] In a ninth aspect, an embodiment of the present application provides a chip system. The chip system includes one or more processors, which are configured to call and run instructions stored in the memory, so that the method in each of the above aspects or the first possible implementation manner of each aspect is executed. The chip system can be composed of chips, or can include chips and other discrete devices.

[0042] Among them, the chip system can include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.

[0043] In a tenth aspect, a communication system is provided, including the aforementioned terminal device and network devices (including access network devices and core network devices). Optionally, the communication system can further include other devices that communicate with the terminal device and / or network devices.

[0044] In a tenth aspect, a communication device is provided, which includes a transceiver module and a processing module, and the communication device is used to execute the method in any of the above aspects and any possible implementation manners. Description of the Drawings

[0045] Figure 1 It is a schematic diagram of the system architecture of the communication system provided by an embodiment of the present application; Figure 2 It is a schematic flowchart of a communication method provided by an embodiment of the present application; Figure 3 It is a schematic flowchart of another communication method provided by an embodiment of the present application; Figure 4 It is a schematic flowchart of still another communication method provided by an embodiment of the present application; Figure 5 It is a schematic structural diagram of a communication device provided by an embodiment of the present application; Figure 6 It is a schematic structural diagram of an electronic device disclosed by an embodiment of the present application. Detailed Embodiments

[0046] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. The terms used in the following embodiments are only for the purpose of describing specific embodiments, and are not intended to limit the present application. As used in the specification and claims of the present application, the singular forms "a", "an", "the", "above", "said", "this" are also intended to include the forms such as "one or more", unless there is a clear contrary indication in the context. It should also be understood that in the embodiments of the present application, "one or more" means one, two or more than two; " / ", which describes the association relationship of associated objects, indicates that three relationships may exist; for example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B may be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0047] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in this specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized.

[0048] The "multiple" involved in the embodiments of the present application means greater than or equal to two. It should be noted that in the description of the embodiments of the present application, words such as "first" and "second" are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

[0049] The embodiments of the present application are applied to a communication system, which can be a second-generation (2G) communication system, a third-generation (3G) communication system, an LTE system, a fifth-generation (5G) communication system, an LTE and 5G hybrid architecture, a 5G new radio (5G NR) system, as well as new communication systems emerging in the future development of communications, etc.

[0050] The communication system includes a first device and a second device. The first device can be a device on the network side for providing network communication functions, and in some cases is also called a network device or a network element. The network device can usually be a base station (including the functional units of the base station, or a combination of the functional units of the base station) or a core network unit. Among them, the core network unit can be a functional unit in the core network, including but not limited to an Access and Mobility Management Function (AMF) unit or a Session Management Function (SMF) unit. The second device can be a device accessing the network, and is usually a terminal device. An example of the communication system is Figure 1 as shown Figure 1 which includes base station 11 and terminal 12.

[0051] In the embodiments provided in the present application, the base station may be any device with wireless transceiver functions, including but not limited to: the evolved base station (nodeB or eNB or e-nodeB, evolutional Node B) in Long Term Evolution (LTE), the base station (gNodeB or gNB) or transmission receiving point (TRP) in New Radio (NR), the base station evolved by 3GPP subsequently, the access node in the Wi-Fi system, the wireless relay node, the wireless backhaul node, etc. The base station may be: a macro base station, a micro base station, a pico base station, a small station, a relay station, or a balloon station, etc. The base station may include one or more co-located or non-co-located transmission reception points (TRP). The base station may also be a radio controller, a centralized unit (CU), and / or a distributed unit (DU) in the scenario of a cloud radio access network (CRAN). The base station may communicate with the terminal device, or may communicate with the terminal device through a relay station. The terminal device may communicate with multiple base stations of different technologies. For example, the terminal device may communicate with a base station supporting the LTE network, may also communicate with a base station supporting the 5G network, and may also perform dual connection with a base station supporting the LTE network and a base station supporting the 5G network.

[0052] In the embodiments provided by the present application, the terminal device can be in various forms. For example, a mobile phone, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a vehicle-mounted terminal device, a wireless terminal device in self-driving, a wireless terminal device in remote medical, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city, a wireless terminal device in smart home, a wearable terminal device, and so on. The terminal device can sometimes also be referred to as a terminal device, a user equipment (UE), an access terminal device, a vehicle-mounted terminal device, an industrial control terminal device, a UE unit, a UE station, a mobile station, a mobile phone, a remote station, a remote terminal device, a mobile device, a UE terminal device, a terminal device, a wireless communication device, a UE agent, or a UE device, etc. The terminal device can also be a fixed terminal device or a mobile terminal device.

[0053] The Synchronization Signal Block (SSB) is a key signal block in the 5G NR system used for cell search, synchronization, and broadcasting system information. The SSB can be composed of the Synchronization Signal (SS) and the Physical Broadcast Channel (PBCH). Specifically, the SSB includes the Primary Synchronization Signal (PSS), the Secondary Synchronization Signal (SSS), and the Physical Broadcast Channel. The PSS is used for time domain synchronization and obtaining part of the cell identifier; the SSS and the PSS together determine the complete cell identifier; the Physical Broadcast Channel is used to transmit the Master Information Block in the System Information Block, which contains basic system configuration information. The SSB is widely used in cell search and synchronization of terminal devices, broadcasting system information, beam management, etc. In addition, as the basic synchronization and broadcast signal of the cell, the SSB provides independent synchronization and system information for each aggregated carrier in carrier aggregation. Carrier Aggregation (CA) is a technical process that combines multiple discrete spectrum carriers (Component Carriers, CCs) into a wider logical channel to improve data transmission rate and system capacity.

[0054] With the rapid development of communication technologies, the communication network architecture is gradually evolving towards high density and complexity, and network energy consumption and synchronization signal transmission efficiency have become important factors restricting the development of communication technologies. In the new radio system defined by the 3rd Generation Partnership Project (3GPP), the SSB is the core signaling for terminal devices to achieve cell search, time synchronization, frequency synchronization, and cell selection, and its transmission mechanism directly affects network energy efficiency and connection performance.

[0055] However, currently, synchronization signal blocks are usually broadcast with fixed parameters. For example, traditional synchronization signal blocks adopt a fixed-period broadcast mechanism, that is, regardless of the network load level, service type differences, or the terminal mobility state, etc., network devices send synchronization signal blocks at a preset fixed period. This "one-size-fits-all" transmission method exposes significant drawbacks in large-scale dense networking scenarios. Specifically, when the network is in a low-load state, there is a problem of redundant transmission when sending synchronization signal blocks at a preset fixed period, which easily leads to high power consumption of the base station. In high-mobility or low-latency service scenarios, it is difficult to adapt to the rapid change of the channel or the strict synchronization accuracy requirements when sending synchronization signal blocks at a fixed period, which easily causes problems such as synchronization delay and handover failure. In addition, the activation of a secondary cell (SCell) depends on the synchronization signal block for synchronization, and the transmission mechanism of transmitting synchronization signal blocks at a fixed period prolongs the carrier aggregation process and affects the network's real-time response ability.

[0056] The core defect of the traditional transmission mechanism of transmitting synchronization signal blocks at a fixed period lies in the deep contradiction between "fixed periodicity" and "scenario dynamics": First, there is an imbalance between energy efficiency and resource utilization. There is redundant signal overhead in the low-load network, resulting in ineffective energy consumption, while the synchronization resource supply is insufficient in burst traffic or high-mobility scenarios, and it is difficult to balance synchronization reliability and transmission efficiency. Second, the synchronization performance is out of touch with dynamic requirements. A fixed period is difficult to adapt to scenarios such as burst traffic and high-speed movement, resulting in an increase in the activation delay of secondary cells and an increase in the handover failure rate. Moreover, the activation process of secondary cells is limited by the synchronization signal blocks sent at a fixed period and cannot meet the requirements of real-time services for fast carrier aggregation. Finally, the ability of parameter dynamic adaptation is lacking. The existing semi-static configuration mechanism lacks the coordination ability between the network-side resource status and the terminal-side real-time requirements, and cannot dynamically optimize the parameters used when sending synchronization signal blocks according to factors such as service quality of service and interference fluctuation, resulting in a decrease in synchronization reliability and too high network energy consumption, forming a systematic conflict between the energy-saving goal and the quality of service.

[0057] In summary, the synchronization signal blocks broadcast with fixed parameters may lead to the inability to flexibly adapt to the network's requirements in different load states, thereby resulting in low network resource utilization or poor network connection stability.

[0058] To make the technical solution of this application clearer and easier to understand, the following describes a communication method according to an embodiment of this application with reference to the accompanying drawings. The embodiment of this application is applicable to the data transmission process in a wireless communication scenario. The communication method provided by the embodiment of this application can be applied to a terminal device or a network device. For example, the terminal device can be a communication device, or the terminal device can be some components in the communication device (such as a processor or a circuit or a chip or a chip system responsible for the communication function), or the terminal device can also be a logic module or software that can implement all or part of the communication device functions. The network device can be a communication device, or the network device can be some components in the communication device (such as a processor or a circuit or a chip or a chip system responsible for the communication function), or the network device can also be a logic module or software that can implement all or part of the communication device functions. The following takes the terminal device or the network device as an example for illustration.

[0059] Please refer to Figure 2 , Figure 2 The flowchart of a communication method provided by the embodiment of this application is shown. The communication method provided by the embodiment of this application mainly includes the following steps: 201. The terminal device sends first indication information. Correspondingly, the network device receives the first indication information.

[0060] Among them, the first indication information is used to indicate the target transmission mode of the synchronization signal block. The target transmission mode includes any one of multiple transmission modes. The parameters corresponding to the multiple transmission modes include the period of the synchronization signal block, and the periods of the synchronization signal blocks corresponding to each transmission mode are different.

[0061] In the embodiments of the present application, multiple transmission modes of the synchronization signal block can be determined based on the value range of the parameters used when transmitting the synchronization signal block. For example, the first transmission mode, the second transmission mode, the third transmission mode, and the fourth transmission mode can be determined, and the parameters corresponding to each transmission mode are different. That is, when transmitting the synchronization signal block using different transmission modes, different parameters can be used. Specifically, the parameters corresponding to the transmission mode can include the period, that is, the transmission period of the synchronization signal block, and it can be made that the period corresponding to the first transmission mode is less than the period corresponding to the second transmission mode, the period corresponding to the second transmission mode is less than the period corresponding to the third transmission mode, and the period corresponding to the third transmission mode is less than the period corresponding to the fourth transmission mode. When transmitting the synchronization signal block using the first transmission mode, the network device can send the synchronization signal block more frequently, so that the terminal device can obtain the synchronization information faster, shorten the synchronization time of the terminal device, improve the reliability of the synchronization signal in a complex environment, so that the terminal device can achieve fast access and stable connection, effectively cope with the synchronization challenges in a high-dynamic scenario, and improve the network connection stability of the terminal device. When transmitting the synchronization signal block using the fourth transmission mode, the network device can minimize the transmission of the synchronization signal block, so as to minimize the network energy consumption and reduce unnecessary resource consumption, thereby improving the resource utilization rate. Among them, the transmission period of the synchronization signal block refers to the time interval for repeated transmission of the synchronization signal block in the time domain.

[0062] Exemplarily, since the transmission period of the synchronization signal block corresponding to the first transmission mode is the lowest, the first transmission mode can be called an emergency transmission mode, which can be applicable to low-latency service scenarios, such as services that are extremely sensitive to latency like autonomous driving and remote medical surgery, and can also be applicable to high-speed mobile scenarios, such as user equipment in vehicles traveling on high-speed railways and highways, and can also be applicable to high-load dense access scenarios, etc. In these scenarios, due to the high-speed movement of the terminal device, the channel may fade quickly, and it is necessary to update the channel state information frequently to support beam tracking and handover. Also, for low-latency services and high loads, high-frequency synchronization signal updates are required to avoid service interruption. Therefore, the synchronization signal block transmitted at a fixed period in the traditional way cannot meet the requirements of the rapid channel fading caused by high-speed movement, the strict alignment of the synchronization signal for low-latency services, and the dense synchronization requirements under high loads. The first transmission mode can adjust the transmission parameters of the synchronization signal block by measures such as significantly shortening the transmission period of the synchronization signal block, increasing the burst number of the synchronization signal block, or increasing the transmission power of the synchronization signal block, so as to cope with the rapid channel change caused by high-speed movement while ensuring the real-time performance of low-latency services. The advantage of the first transmission mode is that it can significantly shorten the synchronization time of the terminal device. By sending the synchronization signal block more frequently, the terminal device can obtain synchronization information faster, reduce the time required for synchronization, and can improve the reliability of the synchronization signal block in complex environments, and ensure the connection stability in high-speed or weak coverage areas by enhancing the coverage ability, so as to ensure the rapid access and stable connection of the terminal device and effectively cope with the synchronization challenges in high-dynamic scenarios.

[0063] Since the transmission period of the synchronization signal block corresponding to the second transmission mode is relatively low, the second transmission mode can be called a normal transmission mode, which can be applicable to daily service scenarios, such as web browsing and social media use, and can also be applicable to medium network load scenarios, such as scenarios where the utilization rate of the physical resource block (PRB) of the network is at a normal level, the terminal density is medium, and there are no large numbers of burst services or high-speed mobile users, and there is no need for extremely high-frequency or low-frequency synchronization signal transmission. The second transmission mode can balance energy consumption and synchronization efficiency on the premise of ensuring service quality. The traditional way of sending the synchronization signal block at a fixed period may cause resource waste under medium loads, and the high energy consumption of the first transmission mode is not applicable to daily scenarios. The second transmission mode can achieve "synchronization on demand" under normal service requirements by optimizing the parameters of transmitting the synchronization signal block, that is, the purpose of setting the second transmission mode is to meet the synchronization requirements of regular services while avoiding the high energy consumption and resource waste in the first transmission mode. The second transmission mode can meet the requirements of most scenarios by balancing the transmission efficiency and energy consumption of the synchronization signal, and at the same time support dynamic adjustment of configuration parameters to optimize resource utilization on the premise of ensuring service quality to adapt to the service quality requirements in different scenarios.

[0064] Since the transmission period of the third transmission mode is relatively high, the third transmission mode can be called an energy-saving transmission mode, which can be applied to scenarios with low network load, such as late-night low-traffic periods, and can also be applied to scenarios where most users are inactive, and can also be applied to non-urgent services or low-priority service scenarios, such as when downloading files, background data synchronization, etc. In these scenarios, the traditional method of sending synchronization signal blocks at a fixed period still continues to transmit at a fixed period under low load, resulting in significant energy consumption waste. The third transmission mode can achieve energy saving by reducing parameters such as the transmission frequency and power of the synchronization signal block without affecting non-urgent services. The main purpose of the third transmission mode is to significantly reduce the energy consumption of the base station and other network devices while ensuring basic services, achieving the goal of energy saving, that is, the advantage of the third transmission mode is that it can effectively reduce the power consumption of network devices, reduce operating costs, and achieve network energy saving. In addition, while saving energy, the third transmission mode can also ensure the basic synchronization requirements of non-urgent services and ensure the continuity of services.

[0065] Since the transmission period of the fourth transmission mode is the highest, the fourth transmission mode can be called a sleep transmission mode, which can be applied to extremely low-load scenarios, such as base stations in remote areas where the number of users is extremely small, and can also be applied to equipment maintenance or standby scenarios. The purpose of the fourth transmission mode is to minimize the transmission of synchronization signals and reduce energy consumption to the lowest level to achieve deep energy saving when there is almost no service demand, and at the same time, it can support rapid wake-up to cope with sudden service demands. The advantage of the fourth transmission mode is to minimize the transmission of synchronization signal blocks, reduce network energy consumption to the lowest level, and reduce unnecessary resource consumption, that is, the fourth transmission mode can achieve deep energy saving with almost no impact on services and support rapid wake-up to cope with sudden load changes. When a sudden service is triggered, the terminal device can activate other transmission modes within a short time to achieve a balance between extreme energy saving and emergency response capabilities.

[0066] It can be understood that the terminal device can autonomously trigger the sending of the first indication information by monitoring its own status, service requirements and other conditions or related parameters in real time. That is, the terminal device can determine the current requirement for the synchronization signal block according to the monitored conditions or related parameters such as its own status and service requirements, and then determine the target transmission mode of the synchronization signal block from one or more transmission modes based on the current requirement for the synchronization signal block. And the terminal device can request the target transmission mode of the synchronization signal block from the network device through the first indication information. That is, the terminal device can inform the network device of its requirement for the synchronization signal block through the first indication information, so that the network device can transmit the synchronization signal block based on the parameters corresponding to the target transmission mode. For example, the synchronization signal block can be transmitted based on the period corresponding to the target transmission mode, so that the terminal device can receive the appropriate synchronization signal block based on its own requirement for the synchronization signal block to complete the synchronization of the terminal device. Compared with the prior art in which the synchronization signal block is broadcast with fixed parameters, it can flexibly adapt to the requirements of the network in different load states, thereby improving the utilization rate of network resources or improving the stability of network connection.

[0067] In addition, it should be noted that the first indication information can also be referred to as the mode index of the target transmission mode. By way of example, if the target transmission mode indicated by the first indication information is the first transmission mode, the first indication information can be 11; if the target transmission mode indicated by the first indication information is the second transmission mode, the first indication information can be 10; if the target transmission mode indicated by the first indication information is the third transmission mode, the first indication information can be 01; if the target transmission mode indicated by the first indication information is the fourth transmission mode, the first indication information can be 00. And in order to distinguish the synchronization signal blocks, the synchronization signal block transmitted based on a fixed period in the prior art can be referred to as a traditional synchronization signal block (always-on SSB, AO-SSB), and the synchronization signal block transmitted based on the target transmission mode can be referred to as an on-demand synchronization signal block (on-demand SSB, OD-SSB).

[0068] In a possible implementation manner of the embodiment of the present application, the parameters corresponding to the multiple transmission modes further include at least one of the number of bursts of the synchronization signal block or the downlink transmission power of the synchronization signal block, and the number of bursts of the synchronization signal block and the number of bursts of the synchronization signal block corresponding to each transmission mode are different.

[0069] Among them, the number of bursts corresponding to the first transmission mode is greater than the number of bursts corresponding to the second transmission mode, the number of bursts corresponding to the second transmission mode is greater than the number of bursts corresponding to the third transmission mode, and the number of bursts corresponding to the third transmission mode is greater than the number of bursts corresponding to the fourth transmission mode; the downlink transmission power corresponding to the first transmission mode is greater than the downlink transmission power corresponding to the second transmission mode, the downlink transmission power corresponding to the second transmission mode is greater than the downlink transmission power corresponding to the third transmission mode, and the downlink transmission power corresponding to the third transmission mode is greater than the downlink transmission power corresponding to the fourth transmission mode.

[0070] In the embodiments of the present application, the various transmission modes of the determined synchronization signal block can not only be different in the period of the synchronization signal block, but also be different in the number of bursts of the synchronization signal block and / or the downlink transmission power of the synchronization signal block. That is, in addition to configuring the corresponding period of the synchronization signal block for different transmission modes respectively, at least one of the corresponding number of bursts of the synchronization signal block or the downlink power of the synchronization signal block can also be configured for different transmission modes respectively, so that the network device can not only dynamically adjust the transmission period of the synchronization signal block according to the requirements of the synchronization signal block, but also dynamically adjust the number of bursts and the downlink power of the synchronization signal block according to the requirements of the synchronization signal block. Compared with the prior art in which fixed parameters are used to broadcast the synchronization signal block, it can flexibly adapt to the requirements of the network in different load states, thereby improving network resource utilization or improving network connection stability.

[0071] It can be understood that since the period of the first transmission mode is the shortest, the first transmission mode can be applied to scenarios where the network needs to send synchronization signal blocks very frequently, such as low-latency service scenarios. Therefore, the number of bursts of the synchronization signal block and the downlink transmission power of the synchronization signal block corresponding to the first transmission mode can also be the largest; since the period of the second transmission mode is relatively short, the first transmission mode can be applied to scenarios where the network needs to send synchronization signal blocks relatively frequently, such as daily service scenarios. Therefore, the number of bursts of the synchronization signal block and the downlink transmission power of the synchronization signal block corresponding to the second transmission mode can also be relatively large; since the period of the third transmission mode is relatively long, the third transmission mode can be applied to scenarios where synchronization signal blocks are not very needed, such as network low-load scenarios. Therefore, the number of bursts of the synchronization signal block and the downlink transmission power of the synchronization signal block corresponding to the third transmission mode can also be relatively small; since the fourth transmission mode can be applied to scenarios where synchronization signal blocks are least needed, such as extremely low-load scenarios, the number of bursts of the synchronization signal block and the downlink transmission power of the synchronization signal block corresponding to the fourth transmission mode can also be the smallest, so that the synchronization signal block received by the terminal device can better meet the requirements of the terminal device.

[0072] Exemplarily, the parameters corresponding to different transmission modes can be as shown in Table 1.

[0073] Table 1

[0074] In addition, it should be noted that other parameters in Table 1 may include parameters such as the position information of the synchronization signal block, the System Frame Number (SFN), and the half-frame index.

[0075] The specific types and numbers of transmission modes can be set according to actual situations. In some cases, the number of bursts, the downlink transmission power, and other parameters corresponding to different transmission modes may be the same or different, and the embodiments of the present application do not limit this.

[0076] In a possible implementation manner of the embodiments of the present application, the first indication information is indicated by a first preamble, and the first preamble is determined based on the first indication information.

[0077] In the embodiments of the present application, after the terminal device determines the first indication information for indicating the target transmission mode, it can further determine the first preamble based on the first indication information. It can be understood that the first preamble determined based on the first indication information can be considered to have a mapping relationship with the first indication information, that is, the first preamble can be used to indicate the first indication information, that is, the first indication information for indicating the target transmission mode can be implicitly indicated by the first preamble, so that the terminal device can send the first preamble determined based on the first indication information to the network device, so that the network device can determine the first indication information for indicating the target transmission mode based on the first preamble, so that the network device can transmit the synchronization signal block based on the parameters corresponding to the target transmission mode. For example, the synchronization signal block can be transmitted based on the period corresponding to the target transmission mode, that is, the network device can dynamically adjust the parameters when sending the synchronization signal block based on the requirements of the terminal device for the synchronization signal block. Compared with the prior art in which fixed parameters are used to broadcast the synchronization signal block, it can flexibly adapt to the requirements of the network in different load states, thereby improving the utilization rate of network resources or improving the stability of network connection.

[0078] It should be noted that a preamble is a specific bit sequence at the start of a data frame or signal, and its core function is to provide necessary synchronization and channel estimation information for the receiving end to ensure that the data can be correctly parsed and processed.

[0079] In a possible implementation manner of the embodiments of the present application, the first preamble is determined based on at least one of a mode phase offset, a root index, or a cyclic shift step size, and at least one of the mode phase offset, the root index, or the cyclic shift step size is determined based on the first indication information.

[0080] In the embodiments of the present application, the generation formula of the first preamble may include at least one of a pattern phase offset, a root index, or a cyclic shift step size. After determining the first indication information for indicating the target transmission mode, the terminal device may construct at least one of a pattern phase offset, a root index, or a cyclic shift step size based on the first indication information, and then further determine the first preamble based on at least one of the pattern phase offset, the root index, or the cyclic shift step size, so that the generated first preamble can accurately indicate the first indication information, and as much as possible avoid the network device misdetecting the first preamble after receiving it, that is, it can enable the network device to accurately determine the target transmission mode requested by the terminal device based on the first preamble.

[0081] Exemplarily, the first preamble may be determined based on the Zadoff-Chu sequence and the first indication information. The generation formula of the first preamble may be as follows: ; Wherein, may be the Zadoff-Chu sequence, is the pattern phase offset, is the cyclic shift offset, is the sequence length. Among them, the Zadoff-Chu sequence may be as follows: ; Wherein, is the sequence length, which can take four values: 839, 139, 1151, or 571; u is the root index, and its value range is an integer in (0, ).

[0082] Wherein, 's value can be determined by , while 's value can be as shown in Table 2 below.

[0083] Table 2

[0084] Among them, the decisive parameter of the cyclic shift step size The index corresponding to the zero correlation zone configuration can be set to be determined by the cell identifier of the cell corresponding to the terminal device and the first indication information. The specific formula can be as follows: ; Wherein, is the index of the zero correlation zone configuration, is the cell identifier, used to distinguish different cells, is the first indication information.

[0085] It can be understood that the value of the pattern phase offset can be determined based on the first indication information. For example, it can be as shown in Table 3 below.

[0086] Table 3

[0087] Similarly, since different root indices generate different Zadoff-Chu sequences, the root index u can be set to be determined by the cell identifier and the first indication information. Specifically, it can be as follows:

[0088] wherein, is the cell identifier, which is used to distinguish different cells, is the first indication information, is the sequence length.

[0089] It can be understood that at least one of the pattern phase offset, the root index, or the cyclic shift step size is constructed based on the first indication information, and then the first preamble is further determined based on at least one of the pattern phase offset, the root index, or the cyclic shift step size, so that the generated first preamble can accurately indicate the first indication information, and as much as possible avoid misdetection of the first preamble by the network device after receiving the first preamble. That is, it can enable the network device to accurately determine the target transmission mode requested by the terminal device based on the first preamble.

[0090] In a possible implementation manner of the embodiments of the present application, the target transmission mode is determined based on one or more candidate transmission modes. The one or more candidate transmission modes include at least one of the first candidate transmission mode, the second candidate transmission mode, the third candidate transmission mode, the fourth candidate transmission mode, or the fifth candidate transmission mode; the first candidate transmission mode is determined based on the Doppler frequency shift of the reference signal, the second candidate transmission mode is determined based on at least one of the reference signal received power or the reference signal received quality, the third candidate transmission mode is determined based on the neighbor cell interference intensity value, the fourth candidate transmission mode is determined based on the data transmission rate, the fifth candidate transmission mode is determined based on the quality of service marking, and the first candidate transmission mode, the second candidate transmission mode, the third candidate transmission mode, the fourth candidate transmission mode, and the fifth candidate transmission mode respectively include any one of the first transmission mode, the second transmission mode, the third transmission mode, or the fourth transmission mode.

[0091] In the embodiments of the present application, when the terminal device monitors its own status, service requirements and other conditions or related parameters, it can compare the monitored conditions or related parameters such as its own status and service requirements with one or more conditions, and respectively determine candidate transmission modes that can be adopted under one or more conditions. Then, based on the candidate transmission modes determined under one or more conditions, it further determines the target transmission mode of the synchronization signal block. That is, the terminal device can analyze the monitored conditions or related parameters such as its own status and service requirements in multiple dimensions to determine the current requirements of the terminal device for the synchronization signal block. Specifically, when determining the target transmission mode of the synchronization signal block, the terminal device can first determine candidate transmission modes corresponding to different conditions from the first transmission mode, the second transmission mode, the third transmission mode or the fourth transmission mode based on different conditions respectively. For example, the terminal device can determine the first candidate transmission mode based on the Doppler frequency shift of the monitored reference signal, determine the second candidate transmission mode based on at least one of the monitored reference signal received power or reference signal received quality, determine the third candidate transmission mode based on the monitored neighboring cell interference intensity value, determine the fourth candidate transmission mode based on the monitored data transmission rate, and determine the fifth candidate transmission mode based on the monitored quality of service flag. Then, based on one or more candidate transmission modes, it further determines the target transmission mode, so that the network device can transmit the synchronization signal block based on the parameters corresponding to the target transmission mode. For example, it can transmit the synchronization signal block based on the period corresponding to the target transmission mode. That is, the network device can dynamically adjust the parameters when transmitting the synchronization signal block based on the requirements of the terminal device for the synchronization signal block. Compared with the prior art in which fixed parameters are used to broadcast the synchronization signal block, it can flexibly adapt to the requirements of the network in different load states, thereby improving the network resource utilization rate or improving the network connection stability.

[0092] It can be understood that one or more of the above conditions may include one or more of mobility conditions, channel quality conditions, signal interference conditions, data traffic demand conditions, service type conditions, etc. In the mobility condition, the terminal device can receive the reference signal sent by the network device, and can calculate the Doppler shift according to the change of the signal frequency of the reference signal, so as to judge the moving speed and scenario of the terminal device itself, and request different transmission modes of the synchronization signal block according to different calculated Doppler shift intervals. In the channel quality condition, the terminal device can continuously monitor the reference signal received power and the reference signal received quality to evaluate the current radio link quality, and can request different transmission modes of the synchronization signal block according to different channel quality conditions determined by the reference signal received power and the reference signal received quality. In the signal interference condition, the terminal device can judge the interference intensity by monitoring the interference intensity of the neighboring cell, that is, the terminal device can measure the power intensity of the neighboring cell signal and combine it with the signal situation received by itself to calculate the neighboring cell interference intensity, and request different transmission modes of the synchronization signal block according to different signal interference intensities. In the data traffic demand condition, the terminal device can judge the traffic demand by monitoring the real-time data traffic of the running application. For example, the terminal device can obtain the data volume sent and received by the application layer, count the data transmission rate per unit time, and request different transmission modes of the synchronization signal block according to different traffic demands or data transmission rates. In the service type condition, the terminal device can judge the service type by identifying the quality of service mark carrying the service. The quality of service mark contains information such as the data rate, delay requirement, reliability, etc. of the service. The terminal device can request different transmission modes of the synchronization signal block according to different quality of service marks.

[0093] Specifically, corresponding thresholds can be set for different conditions, so as to be able to compare the monitored relevant parameters with the thresholds corresponding to the conditions to determine the candidate transmission modes determined under each condition. For example, under the mobility condition, the thresholds corresponding to the mobility condition can be set to include a first threshold, a second threshold, and a third threshold. If the Doppler shift monitored by the terminal device is less than or equal to the first threshold, it can be determined that the terminal device is moving slowly and has a low demand for the synchronization signal block. At this time, the first candidate transmission mode of the synchronization signal block can be determined as the fourth transmission mode, so as to be able to minimize resource consumption. If the Doppler shift monitored by the terminal device is greater than the first threshold and less than or equal to the second threshold, it can be determined that the terminal device is in a medium mobility state and has a moderate demand for the synchronization signal block. At this time, the first candidate transmission mode of the synchronization signal block can be determined as the third transmission mode, so as to reduce resource consumption while ensuring the basic synchronization of the terminal device. If the Doppler shift monitored by the terminal device is greater than the second threshold and less than or equal to the third threshold, it can be determined that the terminal device is moving at high speed and the time-varying characteristics of the channel are enhanced. At this time, the first candidate transmission mode of the synchronization signal block can be determined as the second transmission mode, so as to be able to balance the synchronization accuracy and resource overhead. If the Doppler shift monitored by the terminal device is greater than the third threshold, the terminal device is in an extremely high-speed mobility state, and the Doppler shift causes the channel to change rapidly. At this time, the first candidate transmission mode of the synchronization signal block can be determined as the first transmission mode, so as to be able to ensure fast channel estimation and connection stability by receiving synchronization signal blocks at high frequencies. Among them, the specific values of the first threshold, the second threshold, and the third threshold can be set according to the actual situation. For example, the first threshold can be 2Hz, the second threshold can be 10Hz, and the third threshold can be 50Hz. The embodiments of the present application do not limit this.

[0094] Similarly, under channel quality conditions, the thresholds corresponding to the channel quality conditions can be set to include a fourth threshold, a fifth threshold, and a sixth threshold. If the reference signal received power or reference signal received quality determined by the terminal device is less than or equal to the fourth threshold, it can be determined that the signal coverage is extremely poor and the demand for the synchronization signal block is extremely high. At this time, the second candidate transmission mode of the synchronization signal block can be determined as the first transmission mode. If the reference signal received power or reference signal received quality determined by the terminal device is greater than the fourth threshold and less than or equal to the fifth threshold, it can be determined that the signal coverage is poor and the demand for the synchronization signal block is high. At this time, the second candidate transmission mode of the synchronization signal block can be determined as the second transmission mode. If the reference signal received power or reference signal received quality determined by the terminal device is greater than the fifth threshold and less than or equal to the sixth threshold, it can be determined that the signal coverage is good and the demand for the synchronization signal block is low. At this time, the second candidate transmission mode of the synchronization signal block can be determined as the third transmission mode. If the reference signal received power or reference signal received quality determined by the terminal device is greater than the sixth threshold, it can be determined that the signal coverage is extremely good and the demand for the synchronization signal block is extremely low. At this time, the second candidate transmission mode of the synchronization signal block can be determined as the fourth transmission mode. Among them, the specific values of the fourth threshold, the fifth threshold, and the sixth threshold can be set according to the actual situation, and the embodiments of the present application do not limit this.

[0095] Under signal interference conditions, the thresholds corresponding to the channel quality conditions can be set to include a seventh threshold, an eighth threshold, and a ninth threshold. If the neighboring cell interference intensity value determined by the terminal device is less than or equal to the seventh threshold, it can be determined that the influence degree of the neighboring cell interference on the signal is extremely low and the demand for the synchronization signal block is extremely low. At this time, the third candidate transmission mode of the synchronization signal block can be determined as the fourth transmission mode. If the neighboring cell interference intensity value determined by the terminal device is greater than the seventh threshold and less than or equal to the eighth threshold, it can be determined that the influence degree of the neighboring cell interference on the signal is low and the demand for the synchronization signal block is low. At this time, the third candidate transmission mode of the synchronization signal block can be determined as the third transmission mode. If the neighboring cell interference intensity value determined by the terminal device is greater than the eighth threshold and less than or equal to the ninth threshold, it can be determined that the influence degree of the neighboring cell interference on the signal is high and the demand for the synchronization signal block is high. At this time, the third candidate transmission mode of the synchronization signal block can be determined as the second transmission mode. If the neighboring cell interference intensity value determined by the terminal device is greater than the ninth threshold, it can be determined that the influence degree of the neighboring cell interference on the signal is extremely high and the demand for the synchronization signal block is extremely high. At this time, the third candidate transmission mode of the synchronization signal block can be determined as the first transmission mode. Among them, the specific values of the seventh threshold, the eighth threshold, and the ninth threshold can be set according to the actual situation, and the embodiments of the present application do not limit this.

[0096] Under signal interference conditions, the thresholds corresponding to the data traffic demand conditions can be set to include a tenth threshold, an eleventh threshold, and a twelfth threshold. If the data transmission rate determined by the terminal device is less than or equal to the tenth threshold, it can be determined that the terminal device has an extremely low demand for data traffic and an extremely low demand for the synchronization signal block. At this time, the fourth candidate transmission mode of the synchronization signal block can be determined as the fourth transmission mode. If the data transmission rate determined by the terminal device is greater than the tenth threshold and less than or equal to the eleventh threshold, it can be determined that the terminal device has a relatively low demand for data traffic and a relatively low demand for the synchronization signal block. At this time, the fourth candidate transmission mode of the synchronization signal block can be determined as the third transmission mode. If the data transmission rate determined by the terminal device is greater than the eleventh threshold and less than or equal to the twelfth threshold, it can be determined that the terminal device has a relatively high demand for data traffic and a relatively high demand for the synchronization signal block. At this time, the fourth candidate transmission mode of the synchronization signal block can be determined as the second transmission mode. If the data transmission rate determined by the terminal device is greater than the twelfth threshold, it can be determined that the terminal device has an extremely high demand for data traffic and an extremely high demand for the synchronization signal block. At this time, the fourth candidate transmission mode of the synchronization signal block can be determined as the first transmission mode. Among them, the specific values of the tenth threshold, the eleventh threshold, and the twelfth threshold can be set according to actual situations, and the embodiments of the present application do not limit this.

[0097] Under service type conditions, the thresholds corresponding to the service type conditions can be set to include a thirteenth threshold, a fourteenth threshold, and a fifteenth threshold. If the quality of service mark determined by the terminal device is less than or equal to the thirteenth threshold, it can be determined that the terminal device has an extremely low demand for network resources and an extremely low demand for the synchronization signal block. At this time, the fifth candidate transmission mode of the synchronization signal block can be determined as the fourth transmission mode. If the quality of service mark determined by the terminal device is greater than the thirteenth threshold and less than or equal to the fourteenth threshold, it can be determined that the terminal device has a relatively low demand for network resources and a relatively low demand for the synchronization signal block. At this time, the fifth candidate transmission mode of the synchronization signal block can be determined as the third transmission mode. If the quality of service mark determined by the terminal device is greater than the fourteenth threshold and less than or equal to the fifteenth threshold, it can be determined that the terminal device has a relatively high demand for network resources and a relatively high demand for the synchronization signal block. At this time, the fifth candidate transmission mode of the synchronization signal block can be determined as the second transmission mode. If the data transmission rate determined by the terminal device is greater than the twelfth threshold, it can be determined that the terminal device has an extremely high demand for network resources and an extremely high demand for the synchronization signal block. At this time, the fifth candidate transmission mode of the synchronization signal block can be determined as the first transmission mode. Among them, the specific values of the thirteenth threshold, the fourteenth threshold, and the fifteenth threshold can be set according to actual situations, and the embodiments of the present application do not limit this.

[0098] It should be noted that the Doppler Shift refers to the deviation between the frequency of the received signal and the frequency of the transmitted signal due to the relative motion between the transmitter and the receiver. The Reference Signal Receiving Power (RSRP) refers to the strength of the base station reference signal received by the terminal device, which is used to measure the wireless signal coverage strength and is a core indicator for cell selection and handover. The Reference Signal Receiving Quality (RSRQ) is used to comprehensively evaluate the signal strength and interference level and reflects the signal quality. The neighbor cell interference strength value is used to measure the impact of neighbor cell interference on the signal and directly affects communication reliability. The Data Rate refers to the amount of data transmitted per unit time and is used to measure the throughput capacity of the communication system. The Quality of Service Tag (QoS Tag) refers to the parameter used in the network to identify the priority of the data flow and the resource allocation requirements, which is used to ensure that critical services obtain priority resource guarantees.

[0099] In a possible implementation manner of the embodiment of the present application, when the target transmission mode is determined based on multiple candidate transmission modes, the target transmission mode is determined based on multiple candidate transmission modes and the priority corresponding to each candidate transmission mode in the multiple candidate transmission modes; or, the target transmission mode is determined based on multiple candidate transmission modes and the weight value corresponding to each candidate transmission mode in the multiple candidate transmission modes.

[0100] In the embodiment of the present application, corresponding priorities or weight values can be set in advance for each candidate transmission mode determined based on different conditions, so that after multiple candidate transmission modes are determined, the target transmission mode can be further determined from the multiple candidate transmission modes based on the priority or weight value corresponding to each candidate transmission mode in the multiple candidate transmission modes, so that the network device can transmit the synchronization signal block based on the parameters corresponding to the target transmission mode. For example, the synchronization signal block can be transmitted based on the period corresponding to the target transmission mode, that is, the network device can dynamically adjust the parameters when sending the synchronization signal block based on the needs of the terminal device for the synchronization signal block. Compared with the prior art in which fixed parameters are used to broadcast the synchronization signal block, it can flexibly adapt to the needs of the network in different load states, thereby improving the network resource utilization rate or improving the network connection stability.

[0101] It can be understood that in the embodiments of the present application, the corresponding priorities can be determined in advance for the candidate transmission modes determined under each condition based on the importance of each condition. Exemplarily, if the fifth candidate transmission mode determined under the service type condition has the highest priority and the fourth candidate transmission mode determined under the data traffic demand condition has the lowest priority, then when the target candidate transmission mode is determined based on the fifth candidate transmission mode and the fourth candidate transmission mode, since the priority of the fifth candidate transmission mode is higher than that of the fourth candidate transmission mode, the fifth candidate transmission mode can be directly determined as the fifth candidate transmission mode.

[0102] In the embodiments of the present application, the corresponding weight values can also be assigned to each condition in advance based on the importance of each condition, and the first transmission mode, the second transmission mode, the third transmission mode, and the fourth transmission mode can be quantified into numerical values, that is, the numerical values corresponding to the first transmission mode, the second transmission mode, the third transmission mode, and the fourth transmission mode are constructed. Exemplarily, if the weight value of the fifth candidate transmission mode determined under the service type condition is the first weight value and the weight value of the fourth candidate transmission mode determined under the data traffic demand condition is the second weight value, then the weighted sum can be obtained based on the numerical value corresponding to the fifth candidate mode, the first weight value, the numerical value corresponding to the fourth candidate mode, and the second weight value, and a specific numerical value is obtained, and then the corresponding target transmission mode is determined through this numerical value.

[0103] 202. The network device sends the synchronization signal block based on the target transmission mode. Correspondingly, the terminal device receives the synchronization signal block based on the target transmission mode.

[0104] In the embodiments of the present application, after receiving the first indication information, the network device can determine the target transmission mode of the synchronization signal block based on the first indication information, and can further determine the parameters corresponding to the target transmission mode, so as to be able to send the synchronization signal block based on the parameters corresponding to the target transmission mode. For example, the synchronization signal block can be transmitted based on the period corresponding to the target transmission mode, and the terminal device can receive the synchronization signal block based on the parameters corresponding to the target transmission mode, so as to complete cell synchronization or cell measurement based on the received synchronization signal block. That is, the network device can dynamically adjust the parameters when sending the synchronization signal block based on the requirements of the terminal device for the synchronization signal block. Compared with the prior art in which the synchronization signal block is broadcast with fixed parameters, it can flexibly adapt to the requirements of the network in different load states, thereby improving the network resource utilization rate or improving the network connection stability.

[0105] In a possible implementation manner of the embodiment of the present application, the network device may be pre-configured with the stop transmission condition of the synchronization signal block. When the network device determines that the transmission of the synchronization signal block meets the stop transmission condition of the synchronization signal block, it may stop transmitting the synchronization signal block based on the target transmission mode, and may notify the terminal device in an implicit manner or an explicit manner. The stop transmission condition may include that the transmission number of the synchronization signal block reaches the burst number of the synchronization signal block corresponding to the target transmission mode, or the transmission time of the synchronization signal block reaches the maximum duration T_max of the transmission window corresponding to the target transmission mode. The network device may pre-configure the stop transmission condition of the synchronization signal block to the terminal device, that is, it may notify the terminal device of the stop transmission of the synchronization signal block in an implicit manner, or the network device may send the stop transmission instruction of the synchronization signal block to the terminal device through downlink signaling, that is, it may notify the terminal device of the stop transmission of the synchronization signal block in an explicit manner.

[0106] It can be seen from the examples in the foregoing embodiments that the terminal device may request the target transmission mode of the synchronization signal block from the network device through the first indication information, that is, the terminal device may inform the network device of the terminal device's requirement for the synchronization signal block through the first indication information, so that the network device may transmit the synchronization signal block based on the parameters corresponding to the target transmission mode. For example, the synchronization signal block may be transmitted based on the period corresponding to the target transmission mode, that is, the network device may dynamically adjust the parameters when transmitting the synchronization signal block based on the terminal device's requirement for the synchronization signal block. Compared with the prior art in which the synchronization signal block is broadcast with fixed parameters, it can flexibly adapt to the requirements of the network in different load states, thereby improving the network resource utilization rate or improving the network connection stability.

[0107] Please refer to Figure 3 , Figure 3 The flowchart of another communication method provided by the embodiment of the present application is shown. Another communication method provided by the embodiment of the present application mainly includes the following steps: 301. The network device sends the first configuration information. Correspondingly, the terminal device receives the first configuration information.

[0108] Among them, the first configuration information is used to configure at least one of multiple transmission modes of the synchronization signal block, parameters corresponding to multiple transmission modes, or a preamble set; the parameters corresponding to multiple transmission modes include at least one of the period of the synchronization signal block, the burst number of the synchronization signal block, or the downlink transmission power of the synchronization signal block; the preamble set includes a second preamble, and the second preamble is used to indicate a first mode index, and the first mode index is used to indicate multiple transmission modes.

[0109] In the embodiments of the present application, the network device may pre-configure various transmission modes of the synchronization signal block, the parameters corresponding to each transmission mode, or a preamble set including a second preamble to the terminal device through a first configuration parameter, so that the terminal device can determine the transmission modes that the network device can implement, the parameters corresponding to each transmission mode, and the second preamble corresponding to each transmission mode, so that the terminal device can determine the target transmission mode of the synchronization signal block according to its own needs and the parameters corresponding to each transmission mode, and inform the network device based on the preamble corresponding to the target transmission mode, so that the network device can transmit the synchronization signal block based on the parameters corresponding to the target transmission mode. For example, the synchronization signal block can be transmitted based on the period corresponding to the target transmission mode, that is, the network device can dynamically adjust the parameters when transmitting the synchronization signal block according to the needs of the terminal device for the synchronization signal block. Compared with the prior art in which the synchronization signal block is broadcast with fixed parameters, it can flexibly adapt to the needs of the network in different load states, thereby improving network resource utilization or improving network connection stability.

[0110] It can be understood that the network device can pre-determine the transmission modes of the synchronization signal block that it can support and the parameters corresponding to each transmission mode, and can configure the transmission mode of the synchronization signal block and the parameters corresponding to the transmission mode to the terminal device based on the first configuration information, so that the terminal device can determine the corresponding target transmission mode from the transmission modes of the synchronization signal block configured by the network device according to its own needs for the synchronization signal block, and can receive the synchronization signal block according to the parameters corresponding to the target transmission mode. In addition, the network device can also determine a first mode index for indicating the transmission mode of the synchronization signal block, where the first mode index may include first indication information for indicating the target transmission mode determined by the terminal device from the transmission modes configured by the network device. After determining the first mode index, the network device can further determine a second preamble based on the first mode index, and can aggregate the second preamble into a preamble set, and configure the preamble set to the terminal device through the first configuration information, so that after the terminal device determines the target transmission mode of the synchronization signal block, it can determine the first preamble corresponding to the target transmission mode from the preamble set, that is, the second preamble may include the first preamble, and inform the network device of the target transmission mode determined by the terminal device based on the first preamble.

[0111] In a possible implementation manner of the embodiments of the present application, the parameters corresponding to the various transmission modes further include at least one of the subcarrier spacing of the synchronization signal block, the physical cell identification information of the synchronization signal block, the identification information of the target cell, or the maximum duration of the transmission window, where the target cell is the cell corresponding to the terminal device.

[0112] In the embodiments of the present application, among the parameters corresponding to the transmission mode configured based on the first configuration information, the network device may further include at least one of the subcarrier spacing of the synchronization signal block, the physical cell identity information of the synchronization signal block, the identity information of the target cell, or the maximum duration of the transmission window, so that after the terminal device determines the target transmission mode of the synchronization signal block, it can accurately receive the synchronization signal block sent by the network device based on the parameters corresponding to the target transmission mode, thereby improving the network resource utilization rate or improving the network connection stability.

[0113] It can be understood that the subcarrier spacing (SCS) is the basic unit of the frequency-domain resource of the synchronization signal block, which determines the symbol length and the time slot structure. The physical cell identity information (PCI) is the physical layer identity used to uniquely identify a cell. The target cell may include the primary cell (PCell) or the secondary cell (SCell) corresponding to the terminal device. The primary cell is the cell to which the user equipment establishes a connection when initially accessing the network and is the anchor cell in carrier aggregation. The secondary cell is a cell dynamically added in carrier aggregation to improve the data transmission rate and only carries user plane data. The identity information of the target cell refers to the identity used to identify the target cell. The maximum duration T_max of the transmission window refers to the longest time limit for the transmission of the synchronization signal block in the time domain, and the maximum duration of the transmission window can also be used as an implicit condition for stopping the transmission of the synchronization signal block.

[0114] In addition, among the parameters corresponding to the transmission mode configured by the first configuration information, there may also be parameters such as the system frame number offset, the half-frame index value, the candidate burst position list of the synchronization signal block, the candidate period list of the synchronization signal block, or the candidate burst number list of the synchronization signal block, which can be set according to the actual situation, and the embodiments of the present application do not limit this. Among them, the candidate burst position list of the synchronization signal block may include the position information of one or more possible synchronization signal blocks, the candidate burst position list of the synchronization signal block may include one or more possible transmission periods, and the candidate burst number list of the synchronization signal block may include the burst numbers of one or more possible synchronization signal blocks.

[0115] The following will introduce a possible communication process before the network sends the first configuration information: When a terminal device initially accesses the network, it can first start the cell search process to complete the initial connection with the primary cell. The primary cell transmits traditional synchronization signal blocks in a fixed-period manner. The terminal device detects the primary synchronization signal and the secondary synchronization signal by scanning the downlink frequency band, realizes time and frequency synchronization with the primary cell, and obtains the physical layer identity identifier of the cell, thereby determining the basic parameters of the cell where it is located. In addition, the terminal device determines the physical layer configuration of the primary cell by receiving the AO-SSB and parsing the key system information of the primary cell in the physical broadcast channel. After obtaining the physical layer parameters, the terminal device will establish a Radio Resource Control (RRC) connection through the random access process. Among them, the key system information may include important information such as cell identifier, subcarrier spacing, system frame number, downlink bandwidth, antenna configuration, AO-SSB position indication, cell barred status, etc.

[0116] After completing the physical layer synchronization, the terminal device establishes an RRC connection through the random access process. The terminal device will send a random access preamble, and the network device will respond after receiving it. After several message interactions, the terminal device finally successfully establishes an RRC connection.

[0117] When the network device predicts through the load prediction model that the utilization rate of Physical Resource Blocks (PRBs) of the primary cell will continue to exceed the preconfigured threshold within a certain period in the future, or detects that the number of active users exceeds the preconfigured threshold of the primary cell capacity or the proportion of enhanced mobile broadband services exceeds the preconfigured threshold, the network device will trigger the preconfiguration process of the secondary cell to prepare in advance for increasing the capacity of the primary cell. Or the network device can use a static triggering mechanism based on real-time load thresholds to determine whether to prepare in advance for increasing the capacity of the primary cell.

[0118] Among them, the load prediction model can be a model using a Long Short Term Memory (LSTM) neural network, which determines whether there will be a sharp increase in the load of the primary cell in the future by analyzing historical traffic patterns. The preconfigured threshold refers to the conditional threshold for the network to trigger the preconfiguration process of the secondary cell in advance when predicting that the load of the primary cell may increase sharply in the future. These thresholds are used to prophylactically prepare the resources of the secondary cell, rather than directly activating the secondary cell. The core goal is to reduce the signaling delay during subsequent activation and avoid capacity shortages caused by sudden real-time load increases by preconfiguring parameters in advance. Exemplarily, the preconfigured threshold for PRB utilization rate can be 75%; the preconfigured threshold for the number of active users can be 70% of the capacity of the primary cell; the preconfigured threshold for the proportion of enhanced mobile broadband services can be 50%. Specifically, the preconfigured threshold can be dynamically adjusted by combining the LSTM model to predict the load trend. The static trigger mechanism of the real-time load threshold is a mechanism for triggering the preconfiguration of the secondary cell based on a preset real-time metric threshold. It does not rely on an artificial intelligence prediction model or a machine learning intelligent prediction model, but directly makes a decision by monitoring the current network status, such as whether the PRB utilization rate, the number of users, and the proportion of service types reach the preset threshold.

[0119] When the network device determines that it is necessary to trigger the preconfiguration process of the secondary cell through the load prediction model or the static trigger mechanism of the real-time load threshold, the network device will preconfigure the secondary cell for the terminal device through RRC reconfiguration. During this process, the network device will simultaneously send the secondary cell configuration parameters. However, at this time, the secondary cell is in a deactivated state, that is, although the secondary cell has been configured for the terminal device, the terminal device has not received the secondary cell activation command. To optimize the access performance of the secondary cell in advance, the network device can send the first configuration information to the terminal device through RRC signaling, so that the terminal device can complete the relevant configuration of the synchronization signal block based on the first configuration information.

[0120] 302. The terminal device sends the first indication information, and correspondingly, the network device receives the first indication information.

[0121] Among them, the first indication information is used to indicate the target transmission mode of the synchronization signal block. The target transmission mode includes any one of multiple transmission modes. The parameters corresponding to the multiple transmission modes include the period of the synchronization signal block, and the periods of the synchronization signal blocks corresponding to each transmission mode are different.

[0122] The specific content of step 302 can refer to step 201 in the above embodiment, and the embodiments of the present application will not be elaborated herein.

[0123] 303. The network device sends the first message, and correspondingly, the terminal device receives the first message.

[0124] Among them, the first message is used to indicate the activation of the target transmission mode. The first message includes at least one of first indication information, identification information of the target cell, or second indication information. The second indication information is used to indicate the beam direction corresponding to the synchronization signal block.

[0125] In the embodiments of this application, after the network device receives the first indication information and determines the target transmission mode of the synchronization signal block based on the first indication information, it can determine whether to transmit the synchronization signal block based on the target transmission mode requested by the terminal device based on its own resource status, such as the physical resource block utilization rate, and the parameters corresponding to the target transmission mode. And when it is determined to transmit the synchronization signal block based on the target transmission mode, the activation of the target transmission mode can be indicated through the first message, so that the terminal device can determine that the network device can transmit the synchronization signal block based on the target transmission mode, and can further make preparations for receiving the synchronization signal block based on the target transmission mode based on the identification information of the target cell included in the first indication information or the second indication information used to indicate the beam direction corresponding to the synchronization signal block, so that the transmission of the synchronization signal block can flexibly adapt to the network's needs in different load states, thereby improving network resource utilization or improving network connection stability. Among them, the first message can also be referred to as a mode activation instruction.

[0126] It can be understood that if the target transmission mode of the synchronization signal block requested by the terminal device does not match the resources of the network device or there are multiple terminal devices requesting different transmission modes of the synchronization signal block, the network device can adjust the target transmission mode of the synchronization signal block requested by the terminal device, determine a new target transmission mode from other transmission modes, and send the first indication information corresponding to the new target transmission mode to the terminal device through the first message, so that the terminal device can determine the target transmission mode of the synchronization signal block based on the first message.

[0127] In addition, the beam direction corresponding to the synchronization signal block can be determined by the network device. Specifically, the network device can determine the reachable area of the terminal device in the next period of time through an artificial intelligence model or a machine learning model based on historical beam usage records, such as the best beam index of the terminal device at different positions, global positioning system data, and three-dimensional geographical information, and filter out the beam directions of the synchronization signal blocks that the terminal device can receive within a certain time range. This can transmit the synchronization signal block only in the beam directions reachable by the terminal device, reducing the energy consumption and adjacent cell interference caused by omnidirectional transmission. Or the network device can infer the geographical location of the terminal device based on the position information between the primary cell and the secondary cell, and the time difference or angle of arrival of their received terminal device signals. Combining information such as the reference signal received power of the primary cell reported periodically, the beam directions of the synchronization signal blocks that the terminal device can receive within a certain time range can be filtered out.

[0128] 304. The network device sends a synchronization signal block based on the target transmission mode. Correspondingly, the terminal device receives the synchronization signal block based on the target transmission mode.

[0129] For the specific content of step 304, reference may be made to step 202 in the foregoing embodiments, which will not be elaborated herein in the embodiments of the present application.

[0130] From the illustrative examples of the foregoing embodiments, it can be seen that the terminal device can request the target transmission mode of the synchronization signal block from the network device through the first indication information, that is, the terminal device can inform the network device of the terminal device's requirement for the synchronization signal block through the first indication information, so that the network device can transmit the synchronization signal block based on the parameters corresponding to the target transmission mode. For example, the synchronization signal block can be transmitted based on the period corresponding to the target transmission mode, that is, the network device can dynamically adjust the parameters when transmitting the synchronization signal block based on the terminal device's requirement for the synchronization signal block. Compared with the prior art in which the synchronization signal block is broadcast with fixed parameters, it can flexibly adapt to the requirements of the network in different load states, thereby improving the network resource utilization rate or improving the network connection stability.

[0131] Please refer to Figure 4 , Figure 4 which shows a schematic flowchart of another communication method provided by the embodiments of the present application. Another communication method provided by the embodiments of the present application mainly includes the following steps: 401. The terminal device sends a first request message. Correspondingly, the network device receives the first request message.

[0132] Among them, the first request message is used to request the first resource, and the first indication information is sent based on the first resource.

[0133] In the embodiments of the present application, the terminal device first sends a first request message to the network device to request the first resource required for sending the first indication information, so that after receiving the third indication information for indicating the first resource, the terminal device can request the target transmission mode of the synchronization signal block from the network device through the first indication information. It can be understood that when the secondary cell is activated and the terminal device is still in the RRC connected state with the secondary cell, the terminal device can actively trigger the sending of the first indication information by continuously monitoring its own status, service requirements and other conditions or related parameters, that is, the terminal device can determine the current demand for the synchronization signal block according to the monitored conditions or related parameters such as its own status and service requirements, and then determine the target transmission mode of the synchronization signal block from one or more transmission modes based on the current demand for the synchronization signal block. Before the terminal device requests the target transmission mode of the synchronization signal block from the network device, it can first request the first resource from the network device through the first request message. For example, the first request message may be a 1-bit uplink control information (UCI) signaling, and the first request message may be referred to as a transmission mode uplink scheduling request.

[0134] 402. The network device sends the third indication information. Correspondingly, the terminal device receives the third indication information.

[0135] Among them, the third indication information is used to indicate the first resource.

[0136] In the embodiments of the present application, after receiving the first request message for requesting the first resource, the network device can configure the first resource for the terminal device based on the third indication information, so that after receiving the third indication information for indicating the first resource, the terminal device can request the target transmission mode of the synchronization signal block from the network device through the first indication information, that is, the terminal device can inform the network device of the demand for the synchronization signal block through the first indication information. The first resource may be the time-frequency resource and related parameters required for sending the first information. The core function of the first resource is to coordinate the uplink transmission timing of the terminal device, ensure the precise matching of the sending of the first indication information and the resource received by the network device, avoid collisions and improve the access efficiency. The time-frequency resource may include the starting resource block in the frequency domain (RB Start), the transmission time slot in the time domain (Slot Number), and the position of the orthogonal frequency division multiplexing (OFDM) symbol (Symbol Index), etc. For example, the third indication information may be referred to as an uplink scheduling command.

[0137] 403. The terminal device sends the first indication information. Correspondingly, the network device receives the first indication information.

[0138] Among them, the first indication information is used to indicate the target transmission mode of the synchronization signal block. The target transmission mode includes any one of multiple transmission modes. The parameters corresponding to the multiple transmission modes include the period of the synchronization signal block, and the periods of the synchronization signal blocks corresponding to each transmission mode are different.

[0139] For the specific content of step 403, reference can be made to step 201 in the foregoing embodiment, and details are not described herein again in this embodiment of the present application.

[0140] 404. The network device sends a synchronization signal block based on the target transmission mode. Correspondingly, the terminal device receives the synchronization signal block based on the target transmission mode.

[0141] For the specific content of step 404, reference can be made to step 202 in the foregoing embodiment, and details are not described herein again in this embodiment of the present application.

[0142] In addition, when the primary cell determines that the load in the future period of time is very small. For example, the primary cell determines through a load prediction model that the load within the coverage area of the primary cell in the next 30 seconds is lower than 10%, or the secondary cell determines that the load is continuously lower than the deactivation threshold for a period of time. If the secondary cell detects no access requests from terminal devices and the PRB utilization rate is the threshold for 20 consecutive periods, it can be determined as extremely low load. The network device can send a secondary cell deactivation instruction to the terminal device, and deactivate the secondary cell through this instruction, so that the terminal device disconnects from the secondary cell. The secondary cell deactivation instruction can be a Downlink Control Information (DCI) signaling. After receiving the DCI signaling, the terminal device stops sending any uplink signals to the secondary cell, releases the RRC connection configuration related to the secondary cell, and returns to the single connection state of the primary cell. The secondary cell deactivation instruction means that the network device sends a secondary cell deactivation instruction through DCI format 1_0, that is, issues a secondary cell activation flag, and sets the secondary cell activation flag in the terminal device configuration to "0", which completes the deactivation of the secondary cell.

[0143] It can be seen from the examples in the foregoing embodiments that the terminal device can request the target transmission mode of the synchronization signal block from the network device through the first indication information. That is, the terminal device can inform the network device of the terminal device's requirements for the synchronization signal block through the first indication information, so that the network device can transmit the synchronization signal block based on the parameters corresponding to the target transmission mode. For example, it can transmit the synchronization signal block based on the period corresponding to the target transmission mode. That is, the network device can dynamically adjust the parameters when sending the synchronization signal block based on the terminal device's requirements for the synchronization signal block. Compared with the prior art in which fixed parameters are used to broadcast the synchronization signal block, it can flexibly adapt to the requirements of the network in different load states, thereby improving network resource utilization or improving network connection stability.

[0144] Figure 5 This is a schematic structural diagram of a communication device provided by an embodiment of the present application. The communication device is used to implement the functions of the first communication device in the above method embodiment. Specifically, the communication device includes: A sending module 501, configured to send first indication information, where the first indication information is used to indicate a target transmission mode of a synchronization signal block, the target transmission mode includes any one of multiple transmission modes, and parameters corresponding to the multiple transmission modes include a period of the synchronization signal block, and the periods of the synchronization signal blocks corresponding to each transmission mode are different; A receiving module 502, configured to receive the synchronization signal block, where the synchronization signal block is sent based on the target transmission mode.

[0145] In a possible implementation manner of the embodiment of the present application, the multiple transmission modes include at least one of a first transmission mode, a second transmission mode, a third transmission mode, or a fourth transmission mode. The period of the synchronization signal block corresponding to the first transmission mode is less than the period of the synchronization signal block corresponding to the second transmission mode. The period of the synchronization signal block corresponding to the second transmission mode is less than the period of the synchronization signal block corresponding to the third transmission mode. The period of the synchronization signal block corresponding to the third transmission mode is less than the period of the synchronization signal block corresponding to the fourth transmission mode.

[0146] In a possible implementation manner of the embodiment of the present application, the parameters corresponding to the multiple transmission modes further include at least one of the number of bursts of the synchronization signal block or the downlink transmission power of the synchronization signal block, and the number of bursts of the synchronization signal block and the number of bursts of the synchronization signal block corresponding to each transmission mode are different.

[0147] In a possible implementation manner of the embodiment of the present application, the first indication information is indicated by a first preamble, and the first preamble is determined based on the first indication information.

[0148] In a possible implementation manner of the embodiment of the present application, the first preamble is determined based on at least one of a mode phase offset, a root index, or a cyclic shift step size, and at least one of the mode phase offset, the root index, or the cyclic shift step size is determined based on the first indication information.

[0149] In a possible implementation manner of the embodiment of the present application, the target transmission mode is determined based on one or more candidate transmission modes, and the one or more candidate transmission modes include at least one of a first candidate transmission mode, a second candidate transmission mode, a third candidate transmission mode, a fourth candidate transmission mode, or a fifth candidate transmission mode; the first candidate transmission mode is determined based on the Doppler frequency shift of a reference signal, the second candidate transmission mode is determined based on at least one of the reference signal received power or the reference signal received quality, the third candidate transmission mode is determined based on the neighboring cell interference intensity value, the fourth candidate transmission mode is determined based on the data transmission rate, the fifth candidate transmission mode is determined based on the quality of service marking, and the first candidate transmission mode, the second candidate transmission mode, the third candidate transmission mode, the fourth candidate transmission mode, and the fifth candidate transmission mode respectively include any one of the first transmission mode, the second transmission mode, the third transmission mode, or the fourth transmission mode.

[0150] In a possible implementation manner of the embodiment of the present application, when the target transmission mode is determined based on multiple candidate transmission modes, the target transmission mode is determined based on the multiple candidate transmission modes and the priority corresponding to each candidate transmission mode in the multiple candidate transmission modes; Alternatively, when the target transmission mode is determined based on multiple candidate transmission modes, the target transmission mode is determined based on the multiple candidate transmission modes and the weight value corresponding to each candidate transmission mode in the multiple candidate transmission modes.

[0151] In a possible implementation manner of the embodiment of the present application, the device further includes: The receiving module 502 is further configured to receive first configuration information, where the first configuration information is used to configure at least one of multiple transmission modes of the synchronization signal block, parameters corresponding to the multiple transmission modes, or a preamble set; the parameters corresponding to the multiple transmission modes include at least one of the period of the synchronization signal block, the number of bursts of the synchronization signal block, or the downlink transmission power of the synchronization signal block; the preamble set includes a second preamble, the second preamble is used to indicate the first mode index, the second preamble is determined based on the first mode index, and the first mode index is used to indicate the multiple transmission modes.

[0152] In a possible implementation manner of the embodiment of the present application, the parameters corresponding to the multiple transmission modes further include at least one of the subcarrier spacing of the synchronization signal block, the physical cell identification information of the synchronization signal block, the identification information of the target cell, or the maximum duration of the transmission window, where the target cell is the cell corresponding to the terminal device.

[0153] In a possible implementation manner of the embodiment of the present application, the apparatus further includes: The receiving module 502 is further configured to receive a first message, where the first message is used to indicate activation of the target transmission mode, and the first message includes at least one of the first indication information, the identification information of the target cell, or the second indication information, and the second indication information is used to indicate the beam direction corresponding to the synchronization signal block.

[0154] In a possible implementation manner of the embodiment of the present application, the apparatus further includes: The sending module 501 is further configured to send a first request message, where the first request message is used to request a first resource, and the first resource is used to send the first indication information; The receiving module 502 receives third indication information, where the third indication information is used to indicate the first resource.

[0155] As can be seen from the examples in the foregoing embodiments, the terminal device can request the target transmission mode of the synchronization signal block from the network device through the first indication information, that is, the terminal device can inform the network device of the terminal device's requirements for the synchronization signal block through the first indication information, so that the network device can transmit the synchronization signal block based on the parameters corresponding to the target transmission mode. For example, the synchronization signal block can be transmitted based on the period corresponding to the target transmission mode, that is, the network device can dynamically adjust the parameters when transmitting the synchronization signal block based on the terminal device's requirements for the synchronization signal block. Compared with the prior art in which the synchronization signal block is broadcast using fixed parameters, it can flexibly adapt to the requirements of the network in different load states, thereby improving network resource utilization or improving network connection stability.

[0156] It should be specifically noted that the entity device corresponding to the sending module 501 may be a transmitter, and the entity device corresponding to the receiving module 502 may be a receiver.

[0157] The above Figure 5 The communication device may also be used to implement the functions of the second communication device in the above method embodiment. The communication device specifically includes: A receiving module 502, configured to receive first indication information, where the first indication information is used to indicate a target transmission mode of a synchronization signal block, and the target transmission mode includes any one of multiple transmission modes, and the parameters corresponding to the multiple transmission modes include the period of the synchronization signal block, and the period of the synchronization signal block corresponding to each transmission mode is different; A sending module 501, configured to send the synchronization signal block, and the synchronization signal block is sent based on the target transmission mode.

[0158] In a possible implementation manner of the embodiment of the present application, the multiple transmission modes include at least one of a first transmission mode, a second transmission mode, a third transmission mode, or a fourth transmission mode. The period of the synchronization signal block corresponding to the first transmission mode is less than the period of the synchronization signal block corresponding to the second transmission mode. The period of the synchronization signal block corresponding to the second transmission mode is less than the period of the synchronization signal block corresponding to the third transmission mode. The period of the synchronization signal block corresponding to the third transmission mode is less than the period of the synchronization signal block corresponding to the fourth transmission mode.

[0159] In a possible implementation manner of the embodiment of the present application, the parameters corresponding to the multiple transmission modes further include at least one of the number of bursts of the synchronization signal block or the downlink transmission power of the synchronization signal block.

[0160] In a possible implementation manner of the embodiment of the present application, the first indication information is indicated by a first preamble, and the first preamble is determined based on the first indication information.

[0161] In a possible implementation manner of the embodiment of the present application, the first preamble is determined based on at least one of a mode phase offset, a root index, or a cyclic shift step size, and at least one of the mode phase offset, the root index, or the cyclic shift step size is determined based on the first indication information.

[0162] In a possible implementation manner of the embodiment of the present application, the target transmission mode is determined based on one or more candidate transmission modes. The one or more candidate transmission modes include at least one of a first candidate transmission mode, a second candidate transmission mode, a third candidate transmission mode, a fourth candidate transmission mode, or a fifth candidate transmission mode. The first candidate transmission mode is determined based on the Doppler frequency shift of a reference signal. The second candidate transmission mode is determined based on at least one of the reference signal received power or the reference signal received quality. The third candidate transmission mode is determined based on the neighbor cell interference intensity value. The fourth candidate transmission mode is determined based on the data transmission rate. The fifth candidate transmission mode is determined based on the quality of service flag. Each of the first candidate transmission mode, the second candidate transmission mode, the third candidate transmission mode, the fourth candidate transmission mode, and the fifth candidate transmission mode includes any one of the first transmission mode, the second transmission mode, the third transmission mode, or the fourth transmission mode.

[0163] In a possible implementation manner of the embodiment of the present application, when the target transmission mode is determined based on multiple candidate transmission modes, the target transmission mode is determined based on the multiple candidate transmission modes and the priority corresponding to each candidate transmission mode in the multiple candidate transmission modes. Alternatively, when the target transmission mode is determined based on multiple candidate transmission modes, the target transmission mode is determined based on the multiple candidate transmission modes and the weight value corresponding to each candidate transmission mode in the multiple candidate transmission modes.

[0164] In a possible implementation manner of the embodiments of the present application, the device further includes: The sending module 501 is further configured to send first configuration information, where the first configuration information is used to configure at least one of multiple transmission modes of the synchronization signal block, parameters corresponding to the multiple transmission modes, or a preamble set; the parameters corresponding to the multiple transmission modes include at least one of the period of the synchronization signal block, the number of bursts of the synchronization signal block, or the downlink transmission power of the synchronization signal block; the preamble set includes a second preamble, the second preamble is used to indicate the first mode index, the second preamble is determined based on the first mode index, and the first mode index is used to indicate the multiple transmission modes.

[0165] In a possible implementation manner of the embodiments of the present application, the parameters corresponding to the multiple transmission modes further include at least one of the subcarrier spacing of the synchronization signal block, the physical cell identification information of the synchronization signal block, the identification information of the target cell, or the maximum duration of the transmission window, where the target cell is the cell corresponding to the terminal device.

[0166] In a possible implementation manner of the embodiments of the present application, the device further includes: The sending module 501 is further configured to send a first message, where the first message is used to indicate the activation of the target transmission mode, and the first message includes at least one of the first indication information, the identification information of the target cell, or the second indication information, and the second indication information is used to indicate the beam direction corresponding to the synchronization signal block.

[0167] In a possible implementation manner of the embodiments of the present application, the device further includes: The receiving module 502 is further configured to receive a first request message, where the first request message is used to request a first resource, and the first indication information is sent based on the first resource; The sending module 501 is further configured to send third indication information, where the third indication information is used to indicate the first resource.

[0168] As can be seen from the examples of the foregoing embodiments, the terminal device may request the target transmission mode of the synchronization signal block from the network device through the first indication information, that is, the terminal device may inform the network device of the requirements of the terminal device for the synchronization signal block through the first indication information, so that the network device may transmit the synchronization signal block based on the parameters corresponding to the target transmission mode. For example, the synchronization signal block may be transmitted based on the period corresponding to the target transmission mode, that is, the network device may dynamically adjust the parameters when transmitting the synchronization signal block based on the requirements of the terminal device for the synchronization signal block. Compared with the prior art in which the synchronization signal block is broadcast using fixed parameters, it can flexibly adapt to the requirements of the network in different load states, thereby improving network resource utilization or improving network connection stability.

[0169] Figure 6 This is a composition example of an electronic device provided by an embodiment of this application. The electronic device may be a first device, including but not limited to a base station and a core network unit. Figure 6 Fig. shows a schematic diagram of a simplified base station structure. The base station includes a processor 610, a memory 620, and a transceiver 630. The processor 610 is mainly used for baseband processing and controlling the base station, etc.; the processor 610 is usually the control center of the base station and is used to control the base station to execute the processing operations on the first device side in the above method embodiments. The memory 620 is mainly used for storing computer program codes and data. The transceiver 630 is mainly used for transceiver of radio frequency signals and conversion between radio frequency signals and baseband signals; the transceiver 630 may usually be referred to as a transceiver module, a transceiver, or a transceiver circuit, etc. The transceiver module of the transceiver 630 may also be referred to as a transceiver or a transceiver, etc., and it includes an antenna 633 and a radio frequency circuit ( Figure 6 not shown in the figure), where the radio frequency circuit is mainly used for radio frequency processing. Optionally, the devices used to implement the receiving function in the transceiver 630 may be regarded as a receiver, and the devices used to implement the sending function may be regarded as a transmitter, that is, the transceiver 630 includes a receiver 632 and a transmitter 631. The receiver may also be referred to as a receiving module, a receiver, or a receiving circuit, etc., and the transmitter may be referred to as a transmitting module, a transmitter, or a transmitting circuit, etc.

[0170] The processor 610 and the memory 620 may include one or more single boards, and each single board may include one or more processors and one or more memories. The processor is used to read and execute the programs in the memory to implement the baseband processing function and the control of the base station. If there are multiple single boards, the single boards may be interconnected to enhance the processing ability. As an optional implementation manner, it may also be that multiple single boards share one or more processors, or multiple single boards share one or more memories, or multiple single boards share one or more processors at the same time.

[0171] For example, in one implementation, the transceiver module of the transceiver 630 is used to perform the transceiver-related processes executed by the base station (the first device) in the foregoing method embodiments. The processing module of the processor 610 is used to perform the processing-related processes executed by the base station in the foregoing method embodiments.

[0172] It should be understood that Figure 6 by way of example only and not limitation, the above network device including a processor, a memory, and a transceiver may not depend on Figure 6 the structure shown.

[0173] This application also provides a communication system, which may include a first device (such as a network device such as a base station) and a second device (such as a terminal device such as a mobile phone).

[0174] In this application, a terminal device or a network device may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. Among them, the hardware layer may include hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory). The operating system in the operating system layer may be any one or more computer operating systems that implement service processing through processes. For example, Linux operating system, Unix operating system, Android operating system, iOS operating system, or Windows operating system, etc. The application layer may include applications such as a browser, an address book, a word processing software, and an instant messaging software.

[0175] Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the above-described systems, devices, and modules can refer to the corresponding processes in the foregoing method embodiments, and will not be described herein again.

[0176] In several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is only a logical function division, and there may be other division methods in actual implementation. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other may be an indirect coupling or communication connection through some interfaces, devices, or modules, and may be in an electrical, mechanical, or other form.

[0177] The module described as a separation component may or may not be physically separated. The component shown as a module may or may not be a physical module, that is, it may be located in one place or distributed to multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0178] In addition, in each embodiment of the present application, each functional module can be integrated in a processing module, or each module can exist physically alone, or two or more modules can be integrated in one module. The above-mentioned integrated module can be implemented in the form of hardware or in the form of a software functional module.

[0179] If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the part that essentially contributes to the technical solution of the present application, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the processes of the methods described in each embodiment of the present application. The foregoing storage medium includes: various media that can store program codes such as USB flash drives, mobile hard disks, read-only memories, random access memories, magnetic disks, or optical discs.

[0180] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of each embodiment of the present application.

Claims

1. A communication method, characterized in that, Applied to a terminal device, the method includes: Sending first indication information, where the first indication information is used to indicate a target transmission mode of a synchronization signal block, the target transmission mode includes any one of a plurality of transmission modes, and parameters corresponding to the plurality of transmission modes include the period of the synchronization signal block, and the period of the synchronization signal block corresponding to each transmission mode is different; Receiving the synchronization signal block, where the synchronization signal block is sent based on the target transmission mode.

2. The method according to claim 1, wherein The plurality of transmission modes includes at least one of a first transmission mode, a second transmission mode, a third transmission mode, or a fourth transmission mode. The period of the synchronization signal block corresponding to the first transmission mode is less than the period of the synchronization signal block corresponding to the second transmission mode. The period of the synchronization signal block corresponding to the second transmission mode is less than the period of the synchronization signal block corresponding to the third transmission mode. The period of the synchronization signal block corresponding to the third transmission mode is less than the period of the synchronization signal block corresponding to the fourth transmission mode.

3. The method according to claim 1 or 2, characterized in that, Parameters corresponding to the plurality of transmission modes further include at least one of the number of bursts of the synchronization signal block or the downlink transmission power of the synchronization signal block, and the number of bursts of the synchronization signal block and the number of bursts of the synchronization signal block corresponding to each transmission mode are different.

4. The method according to claim 1 or 2, characterized in that The first indication information is indicated by a first preamble, and the first preamble is determined based on the first indication information.

5. The method according to claim 4, characterized in that, The first preamble is determined based on at least one of a mode phase offset, a root index, or a cyclic shift step size, and at least one of the mode phase offset, the root index, or the cyclic shift step size is determined based on the first indication information.

6. The method according to claim 1, characterized in that, The target transmission mode is determined based on one or more candidate transmission modes, and the one or more candidate transmission modes include at least one of a first candidate transmission mode, a second candidate transmission mode, a third candidate transmission mode, a fourth candidate transmission mode, or a fifth candidate transmission mode; the first candidate transmission mode is determined based on the Doppler frequency shift of a reference signal, the second candidate transmission mode is determined based on at least one of the reference signal received power or the reference signal received quality, the third candidate transmission mode is determined based on the neighbor cell interference intensity value, the fourth candidate transmission mode is determined based on the data transmission rate, and the fifth candidate transmission mode is determined based on the quality of service marking.

7. The method according to claim 6, wherein When the target transmission mode is determined based on a plurality of candidate transmission modes, the target transmission mode is determined based on the plurality of candidate transmission modes and the priority corresponding to each candidate transmission mode in the plurality of candidate transmission modes; Or, when the target transmission mode is determined based on a plurality of candidate transmission modes, the target transmission mode is determined based on the plurality of candidate transmission modes and the weight value corresponding to each candidate transmission mode in the plurality of candidate transmission modes.

8. The method according to claim 1, characterized in that, Before sending the first indication information, the method further includes: Receive first configuration information, where the first configuration information is used to configure at least one of multiple transmission modes of the synchronization signal block, parameters corresponding to the multiple transmission modes, or a preamble set; the parameters corresponding to the multiple transmission modes include at least one of a period of the synchronization signal block, a number of bursts of the synchronization signal block, or a downlink transmission power of the synchronization signal block; the preamble set includes a second preamble, and the second preamble is used to indicate a first mode index, and the first mode index is used to indicate the multiple transmission modes.

9. The method according to claim 8, wherein The parameters corresponding to the multiple transmission modes further include at least one of a subcarrier spacing of the synchronization signal block, physical cell identification information of the synchronization signal block, identification information of a target cell, or a maximum duration of a transmission window, where the target cell is a cell corresponding to the terminal device.

10. The method according to claim 1, wherein Before receiving the synchronization signal block, the method further includes: Receive a first message, where the first message is used to indicate activation of the target transmission mode, and the first message includes at least one of the first indication information, identification information of the target cell, or second indication information, and the second indication information is used to indicate a beam direction corresponding to the synchronization signal block, and the target cell is a cell corresponding to the terminal device.

11. The method according to claim 1, characterized in that Before sending the first indication information, the method further includes: Send a first request message, where the first request message is used to request a first resource, and the first indication information is sent based on the first resource; Receive third indication information, where the third indication information is used to indicate the first resource.

12. A communication method, characterized in that, Applied to a network device, the method includes: Receive first indication information, where the first indication information is used to indicate a target transmission mode of a synchronization signal block, and the target transmission mode includes any one of multiple transmission modes, and the parameters corresponding to the multiple transmission modes include a period of the synchronization signal block, and the periods of the synchronization signal block corresponding to each transmission mode are different; Send the synchronization signal block, and the synchronization signal block is sent based on the target transmission mode.

13. The method according to claim 12, wherein The multiple transmission modes include at least one of a first transmission mode, a second transmission mode, a third transmission mode, or a fourth transmission mode, the period of the synchronization signal block corresponding to the first transmission mode is less than the period of the synchronization signal block corresponding to the second transmission mode, the period of the synchronization signal block corresponding to the second transmission mode is less than the period of the synchronization signal block corresponding to the third transmission mode, and the period of the synchronization signal block corresponding to the third transmission mode is less than the period of the synchronization signal block corresponding to the fourth transmission mode.

14. The method according to claim 12 or 13, characterized in that, The parameters corresponding to the multiple transmission modes further include at least one of a number of bursts of the synchronization signal block or a downlink transmission power of the synchronization signal block, and the number of bursts of the synchronization signal block and the downlink transmission power of the synchronization signal block corresponding to each transmission mode are different.

15. The method according to claim 12 or 13, characterized in that The first indication information is indicated by a first preamble, and the first preamble is determined based on the first indication information.

16. The method according to claim 15, characterized in that, The first preamble is determined based on at least one of a pattern phase offset, a root index, or a cyclic shift step size, and at least one of the pattern phase offset, the root index, or the cyclic shift step size is determined based on the first indication information.

17. The method according to claim 12, wherein The target transmission mode is determined based on one or more candidate transmission modes, and the one or more candidate transmission modes include at least one of a first candidate transmission mode, a second candidate transmission mode, a third candidate transmission mode, a fourth candidate transmission mode, or a fifth candidate transmission mode; the first candidate transmission mode is determined based on the Doppler shift of a reference signal, the second candidate transmission mode is determined based on at least one of a reference signal received power or a reference signal received quality, the third candidate transmission mode is determined based on a neighboring cell interference intensity value, the fourth candidate transmission mode is determined based on a data transmission rate, and the fifth candidate transmission mode is determined based on a quality of service flag.

18. The method according to claim 17, wherein In a case where the target transmission mode is determined based on a plurality of candidate transmission modes, the target transmission mode is determined based on the plurality of candidate transmission modes and a priority corresponding to each candidate transmission mode in the plurality of candidate transmission modes; Or, in a case where the target transmission mode is determined based on a plurality of candidate transmission modes, the target transmission mode is determined based on the plurality of candidate transmission modes and a weight value corresponding to each candidate transmission mode in the plurality of candidate transmission modes.

19. The method according to claim 12, characterized in that, Before receiving the first indication information, the method further includes: Sending first configuration information for configuring at least one of a plurality of transmission modes of the synchronization signal block, parameters corresponding to the plurality of transmission modes, or a preamble set; the parameters corresponding to the plurality of transmission modes include at least one of a period of the synchronization signal block, a number of bursts of the synchronization signal block, or a downlink transmission power of the synchronization signal block; the preamble set includes a second preamble for indicating a first mode index, the second preamble is determined based on the first mode index, and the first mode index is used to indicate the plurality of transmission modes.

20. The method according to claim 19, characterized in that, The parameters corresponding to the plurality of transmission modes further include at least one of a subcarrier spacing of the synchronization signal block, physical cell identification information of the synchronization signal block, identification information of a target cell, or a maximum duration of a transmission window, where the target cell is a cell corresponding to a terminal device.

21. The method according to claim 12, wherein Before sending the synchronization signal block, the method further includes: Sending a first message for indicating activation of the target transmission mode, the first message including at least one of the first indication information, identification information of a target cell, or second indication information, where the second indication information is used to indicate a beam direction corresponding to the synchronization signal block.

22. The method according to claim 12, wherein Before receiving the first indication information, the method further includes: Receiving a first request message for requesting a first resource, where the first indication information is sent based on the first resource; Sending third indication information for indicating the first resource.

23. A communication device, characterized in that, Comprising a processor, the processor being coupled to a memory, wherein a program or instructions are stored in the memory, and the processor executes the program or instructions such that the apparatus is configured to perform the method according to any one of claims 1 to 22.

24. A computer-readable storage medium having a computer program or instructions stored thereon, characterized in that, When the computer program or instructions are executed, the computer is caused to perform the method according to any one of claims 1 to 22.

25. A communication system, characterized in that, Comprising a communication device according to claim 23.

26. A chip system, the chip system comprising one or more processors, the one or more processors being configured to call and run instructions stored in a memory from the memory such that the method according to any one of claims 1 to 22 is executed.

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