WO2025097921A1 - Synchronization method and apparatus - Google Patents

Abstract

Provided in the embodiments of the present application are a synchronization method and apparatus, which can improve the coverage capability of synchronization information. The method comprises: a terminal device receiving a first synchronization signal and physical broadcasting signal block (SSB), wherein the first SSB comprises first information, and the first information is used for determining a reception policy for a plurality of system information blocks SIB1 associated with the first SSB; and the terminal device receiving the plurality of SIB1 or one of the plurality of SIB1 on the basis of the first information.

Description

A synchronization method and device

This application claims the priority of the Chinese patent application filed with the State Intellectual Property Office on November 9, 2023, with application number 202311494595.6 and application name “A synchronization method and device”, all contents of which are incorporated by reference in this application.

Technical Field

The present application relates to the field of communications, and more specifically, to a synchronization method and device.

Background Art

In order to meet the growing demand for wireless communications, wireless communication systems have introduced more and more new spectrum resources. High frequency has the natural advantage of large bandwidth and is one of the effective ways to improve communication service capabilities. However, high frequency has more serious path loss than low frequency. To overcome this defect, network equipment continues to evolve towards large array technology, and as a result, the beams are getting narrower and the number of beams is increasing. In order to maintain good communication quality, network equipment and terminal equipment need to perform beam training and beam tracking to achieve the effect of beam alignment.

However, due to the large differences in coverage capabilities of different channels/signals, the coverage capability of the system is limited by its shortcomings. In the random access process, the number of time-frequency resources corresponding to the synchronization/broadcasting signal block (synchronization signal and physical broadcasting channel block, SSB)/system information block (SIB) SIB1/physical random access channel (PRACH) at each angle is consistent, and the beam width of the SSB beam/SIB1 beam/PRACH beam used by the network equipment in each direction is consistent. The actual distribution of users is not taken into account. The distribution distances of users in different directions may be different, and the coverage requirements are different. The distribution density of users in different directions may be different, and the requirements for access resources are different.

Summary of the invention

The embodiments of the present application provide a synchronization method and device, which can improve the coverage capability of synchronization information.

In order to achieve the above purpose, this application adopts the following technical solutions:

In a first aspect, the method may be executed by a terminal device, or by a component of the terminal device, such as a processor, a chip, or a chip system of the terminal device, or may be implemented by a logic module or software that can implement all or part of the functions of the terminal device. Taking the method being executed by a terminal device as an example, the method includes: the terminal device receives a first synchronization/broadcast signal block SSB, the first SSB includes first information, and the first information is used to determine a reception strategy of multiple system message blocks SIB1 associated with the first SSB; the terminal device receives multiple SIB1s or one SIB1 among multiple SIB1s according to the first information.

In the synchronization method provided in the embodiment of the present application, the first SSB includes first information for determining the reception strategy of multiple SIB1s associated with the first SSB, and the terminal device can receive multiple SIB1s associated with the first SSB or one SIB1 among multiple SIB1s according to the first information. The network device can dynamically adjust the number of multiple SIB1s associated with the first SSB according to the user distribution to improve the coverage capability of SIB1.

In the embodiment of the present application, the first information includes one or more of the following: the number of multiple SIB1s, the beam width of each SIB1 in the multiple SIB1s relative to the first SSB, the frequency divisions corresponding to the multiple SIB1s, or the time divisions corresponding to the multiple SIB1s. The terminal device can determine the time-frequency resource pattern information of the multiple SIB1s associated with the first SSB based on the relatively simplified first information; when the multiple SIB1s associated with the first SSB are sent in a frequency division manner, the scheme can reduce the scanning delay of the network device and the synchronization delay of the terminal device, increase the chances of the network device and the terminal device shutting down and sleeping, and thus reduce the energy consumption of the network device and the terminal device.

In a possible implementation, the terminal device receives multiple SIB1s according to the first information, including: the terminal device determines the time-frequency resource pattern information corresponding to the multiple SIB1s according to the first information; the terminal device receives the multiple SIB1s according to the time-frequency resource pattern information of the multiple SIB1s. This solution can enable the terminal device to determine the time-frequency resource pattern information corresponding to the multiple SIB1s according to the first information, and further receive the multiple SIB1s according to the time-frequency resource pattern information.

In the embodiment of the present application, multiple SIB1s are carried on predefined time-frequency resources. This solution can reduce the amount of information carried in the first SSB and improve the reliability of the first SSB.

In an embodiment of the present application, when a terminal device receives multiple SIB1s based on first information, the method also includes: the terminal device determines a first SIB1 from multiple SIB1s, the first SIB1 includes second information, and the second information is used to determine the time-frequency resources of one or more random access channels PRACH associated with the first SIB1; the first SIB1 is one SIB1 among the multiple SIB1s.

In an embodiment of the present application, the method further includes: the terminal device sends a random access request from a first PRACH, wherein the first PRACH is a PRACH associated with the first SIB1 or one of multiple PRACHs associated with the first SIB1. The terminal device can determine the time-frequency resources of one or more PRACHs associated with the first SIB1 according to the second information, and then send a random access message from the first PRACH to complete random access.

In an embodiment of the present application, the second information includes one or more of the following: the number of multiple random access channels associated with the first SIB1, the beam width of each random access channel in the multiple random access channels associated with the first SIB1 relative to the first SIB1, the frequency division number corresponding to the multiple random access channels associated with the first SIB1, or the time division number corresponding to the multiple random access channels associated with the first SIB1. This solution allows the terminal device to determine the time-frequency resources of multiple PRACHs associated with the first SIB1 based on the relatively simplified second information.

In another possible implementation, the first SSB also includes quantized angle information of the first SSB. This solution enables the terminal device to perform angle estimation more accurately according to the quantized angle information of the first SSB, and then determine the second SIB1.

In an embodiment of the present application, a terminal device receives one of multiple SIB1s according to the first information, including: the terminal device determines the time-frequency resource pattern information corresponding to multiple SIB1s according to the first information; determines the second SIB1 according to the quantization angle information of the first SSB, and the second SIB1 is one of the multiple SIB1s; the terminal device receives the second SIB1 according to the time-frequency resource pattern information corresponding to the multiple SIB1s. This solution allows the terminal device to determine the time-frequency resource pattern information of multiple SIB1s associated with the first SSB according to the first information, and determine the second SIB1 according to the quantization angle information of the first SSB, so that the terminal device can accurately receive the second SIB1.

In a possible implementation, the first quantization rule corresponding to the quantization angle information of the first SSB is predefined, which can reduce the amount of information carried by the first SSB and improve the reliability of the first SSB.

In another possible implementation, the first SSB further includes a first quantization rule corresponding to the quantization angle information of the first SSB. This approach is more flexible.

In the embodiment of the present application, the second SIB1 is carried on the predefined time-frequency resources. This solution can reduce the amount of information carried in the second SIB1 and improve the reliability of the second SIB1.

In the embodiment of the present application, the second SIB1 includes quantization angle information of the second SIB1 and third information, and the third information is used to determine the time-frequency resources of multiple random access channels associated with the second SIB1.

In an embodiment of the present application, the method further includes: the terminal device determines the time-frequency resource pattern information of multiple random access channels associated with the second SIB1 according to the third information; the terminal device determines the time-frequency resources of multiple random access channels associated with the second SIB1 according to the time-frequency resource pattern information of multiple random access channels associated with the second SIB1; the terminal device determines the second random access channel according to the quantization angle information of the second SIB1, and the second random access channel is one of the multiple random access channels associated with the second SIB1; the terminal device sends a random access request from the second random access channel. This solution allows the terminal device to determine the time-frequency resources of multiple PRACHs associated with the second SIB1 according to the third information, determine the second random access channel according to the quantization angle information of the second SIB1, and then send a random access message from the second PRACH to complete random access.

In an embodiment of the present application, the third information includes one or more of the following information: the number of multiple PRACHs associated with the second SIB1, the beam width of each random access channel in the multiple PRACHs associated with the second SIB1 relative to the second SIB1, the frequency division number corresponding to the multiple PRACHs associated with the second SIB1, or the time division number corresponding to the multiple PRACHs associated with the second SIB1. This solution allows the terminal device to determine the time-frequency resource pattern information of the multiple PRACHs associated with the second SIB1 based on the relatively simplified third information.

In a possible implementation, the second quantization rule corresponding to the quantization angle information of the second SIB1 is predefined. This solution can reduce the amount of information carried by the second SIB1 and improve the reliability of the second SIB1.

In another possible implementation, the second SIB1 further includes a second quantization rule corresponding to the quantization angle information of the second SIB1. This approach is more flexible.

In an embodiment of the present application, the collection of beam ranges corresponding to each SIB1 in multiple SIB1s associated with the first SSB is a subset of the beam range corresponding to the first SSB.

In one embodiment of the present application, a collection of beam ranges corresponding to each of the multiple PRACHs associated with each SIB1 in multiple SIB1s is a subset of the beam range corresponding to each SIB1.

In a second aspect, the method can be executed by a network device, or by a component of the network device, such as a processor, chip, or chip system of the network device, or by a logic module or software that can implement all or part of the functions of the network device. Taking the method as an example that the method can be executed by a network device, the method includes: the network device sends a first synchronization/broadcast signal block SSB, the first SSB It includes first information, where the first information is used to determine a receiving strategy for multiple system message blocks SIB1 associated with a first SSB, where the receiving strategy is used to receive multiple SIB1s or one SIB1 among multiple SIB1s; the network device sends multiple SIB1s associated with the first SSB.

In the synchronization method provided by the embodiment of the present application, the first SSB includes first information for determining a reception strategy of multiple SIB1s associated with the first SSB, so that the terminal device can receive multiple SIB1s associated with the first SSB or one SIB1 among multiple SIB1s according to the first information. The network device can dynamically adjust the number of multiple SIB1s associated with the first SSB according to the user distribution to improve the coverage capability of SIB1.

In an embodiment of the present application, the first information includes one or more of the following: the number of multiple SIB1s, the beam width of each SIB1 in the multiple SIB1s relative to the first SSB, the frequency divisions corresponding to the multiple SIB1s, or the time divisions corresponding to the multiple SIB1s. This solution allows the terminal device to determine the time-frequency resource pattern information of the multiple SIB1s associated with the first SSB based on the relatively simplified first information, that is, the first SSB sent by the network device carries less information and the reliability of the first SSB is higher; when the multiple SIB1s associated with the first SSB are sent in a frequency division manner, the solution can reduce the scanning delay of the network device and the synchronization delay of the terminal device, increase the chances of the network device and the terminal device shutting down and sleeping, and thus reduce the energy consumption of the network device and the terminal device.

In a possible implementation, the first information is used to determine the time-frequency resource pattern information corresponding to the multiple SIB1s; the network device sends the multiple SIB1s, including: the network device sends the multiple SIB1s according to the time-frequency resource pattern information corresponding to the multiple SIB1s. This solution can enable the network device to send the multiple SIB1s according to the time-frequency resource pattern information corresponding to the multiple SIB1s.

In the embodiment of the present application, multiple SIB1s are carried on predefined resources. This solution can reduce the amount of information carried in the first SSB and improve the reliability of the first SSB.

In the embodiment of the present application, the multiple SIB1s include a first SIB1, the first SIB1 includes second information, and the second information is used to determine the time-frequency resources of one or more random access channels PRACH associated with the first SIB1.

In an embodiment of the present application, the method further includes: the network device receives a random access request from a first PRACH, wherein the first PRACH is a PRACH associated with the first SIB1 or one of multiple PRACHs associated with the first SIB1. This solution enables the network device to receive a random access message sent by the terminal device from the first PRACH, thereby completing random access of the terminal device.

In an embodiment of the present application, the first SIB1 includes second information, and the second information includes one or more of the following: the number of multiple PRACHs associated with the first SIB1, the beam width of each PRACH in the multiple PRACHs associated with the first SIB1 relative to the first SIB1, the frequency division number corresponding to the multiple PRACHs associated with the first SIB1, or the time division number corresponding to the multiple PRACHs associated with the first SIB1. This solution allows the terminal device to determine the time-frequency resource pattern information of the multiple PRACHs associated with the first SIB1 based on the relatively simplified second information, that is, the first SIB1 sent by the network device carries less information and the reliability of the first SIB1 is higher.

In another possible implementation, the first SSB also includes quantized angle information of the first SSB. This solution enables the terminal device to perform angle estimation more accurately according to the quantized angle information of the first SSB, and then determine the second SIB1.

In an embodiment of the present application, a network device sends multiple SIB1s, including: the network device sends multiple SIB1s according to the time-frequency resource pattern information corresponding to the multiple SIB1s; wherein the multiple SIB1s include a second SIB1, the quantization angle information of the first SSB is used to determine the second SIB1, and the first information is used to determine the time-frequency resource pattern information corresponding to the multiple SIB1s. This solution allows the terminal device to determine the time-frequency pattern information of multiple SIB1s associated with the first SSB according to the first information, and determine the second SIB1 according to the quantization angle information of the first SSB, thereby allowing the terminal device to accurately receive the second SIB1.

In a possible implementation, the first quantization rule corresponding to the quantization angle information of the first SSB is predefined, which can reduce the amount of information carried by the first SSB and improve the reliability of the first SSB.

In another possible implementation, the first SSB further includes a first quantization rule corresponding to the quantization angle information of the first SSB. This approach is more flexible.

In the embodiment of the present application, the second SIB1 is carried on predefined resources. This solution can reduce the amount of information carried in the second SIB1 and improve the reliability of the second SIB1.

In the embodiment of the present application, the second SIB1 includes quantization angle information of the second SIB1 and third information, and the third information is used to determine the time-frequency resources of multiple PRACHs associated with the second SIB1.

In an embodiment of the present application, the method further includes: the network device receives a random access request from a second random access channel; wherein the time-frequency resources of multiple PRACHs associated with the second SIB1 are determined according to the time-frequency resource pattern information of multiple PRACHs associated with the second SIB1, the time-frequency resource pattern information of multiple PRACHs associated with the second SIB1 is determined according to third information, and the second random access channel is determined from multiple PRACHs associated with the second SIB1 according to the quantization angle information of the second SIB1. This allows the network device to receive a random access message from the second PRACH, thereby completing random access of the terminal device.

In an embodiment of the present application, the third information includes one or more of the following information: the number of multiple PRACHs associated with the second SIB1, the beam width of each random access channel in the multiple PRACHs associated with the second SIB1 relative to the second SIB1, the frequency division number corresponding to the multiple PRACHs associated with the second SIB1, or the time division number corresponding to the multiple PRACHs associated with the second SIB1. This solution allows the terminal device to determine the time-frequency resource pattern information of the multiple PRACHs associated with the second SIB1 based on the relatively simplified third information, that is, the second SIB1 sent by the network device carries less information and the reliability of the second SIB1 is higher.

In a possible implementation, the second quantization rule corresponding to the quantization angle information of the second SIB1 is predefined. This solution can reduce the amount of information carried by the second SIB1 and improve the reliability of the second SIB1.

In another possible implementation, the second SIB1 includes a second quantization rule corresponding to the quantization angle information of the second SIB1. This approach is more flexible.

In an embodiment of the present application, the collection of beam ranges corresponding to each SIB1 in multiple SIB1s associated with the first SSB is a subset of the beam range corresponding to the first SSB.

In the embodiment of the present application, the collection of beam ranges corresponding to each of the multiple PRACHs associated with each SIB1 in the multiple SIB1s is a subset of the beam range corresponding to each SIB1.

In a third aspect, the method can be executed by a terminal device, or by a component of the terminal device, such as a processor, chip, or chip system of the terminal device, or by a logic module or software that can implement all or part of the functions of the terminal device. Taking the method being executed by a terminal device as an example, the method includes: the terminal device receives a first synchronization/broadcast signal block SSB, the first SSB includes first information, and the first information includes one or more of the following: the number of multiple SIB1s, the beam width of each SIB1 in the multiple SIB1s relative to the first SSB, the frequency fractions corresponding to the multiple SIB1s, or the time fractions corresponding to the multiple SIB1s; the terminal device receives multiple SIB1s or one SIB1 in the multiple SIB1s according to the first information.

In the synchronization method provided by the embodiment of the present application, the first SSB includes first information for determining a reception strategy of multiple SIB1s associated with the first SSB, so that the terminal device can receive multiple SIB1s associated with the first SSB or one SIB1 among multiple SIB1s according to the first information. The network device can dynamically adjust the number of multiple SIB1s associated with the first SSB according to the user distribution to improve the coverage capability of SIB1.

In a possible implementation, the terminal device receives multiple SIB1s according to the first information, including: the terminal device determines the time-frequency resource pattern information corresponding to the multiple SIB1s according to the first information; the terminal device receives the multiple SIB1s according to the time-frequency resource pattern information of the multiple SIB1s. This solution can enable the terminal device to determine the time-frequency resource pattern information corresponding to the multiple SIB1s according to the first information, and further receive the multiple SIB1s according to the time-frequency resource pattern information.

In the embodiment of the present application, multiple SIB1s are carried on predefined time-frequency resources. This solution can reduce the amount of information carried in the first SSB and improve the reliability of the first SSB.

In an embodiment of the present application, when a terminal device receives multiple SIB1s based on first information, the method also includes: the terminal device determines a first SIB1 from multiple SIB1s, the first SIB1 includes second information, and the second information is used to determine the time-frequency resources of one or more random access channels PRACH associated with the first SIB1; the first SIB1 is one SIB1 among the multiple SIB1s.

In an embodiment of the present application, the method further includes: the terminal device sends a random access request from a first PRACH, wherein the first PRACH is a PRACH associated with the first SIB1 or one of multiple PRACHs associated with the first SIB1. This solution allows the terminal device to determine the time-frequency resources of one or more PRACHs associated with the first SIB1 according to the second information, and then send a random access message from the first PRACH to complete random access.

In an embodiment of the present application, the second information includes one or more of the following: the number of multiple random access channels associated with the first SIB1, the beam width of each random access channel in the multiple random access channels associated with the first SIB1 relative to the first SIB1, the frequency division number corresponding to the multiple random access channels associated with the first SIB1, or the time division number corresponding to the multiple random access channels associated with the first SIB1. This solution allows the terminal device to determine the time-frequency resources of multiple PRACHs associated with the first SIB1 based on the relatively simplified second information.

In another possible implementation, the first SSB also includes quantized angle information of the first SSB. This solution enables the terminal device to perform angle estimation more accurately according to the quantized angle information of the first SSB, and then determine the second SIB1.

In an embodiment of the present application, a terminal device receives one of multiple SIB1s based on first information, including: the terminal device determines time-frequency resource pattern information corresponding to multiple SIB1s based on the first information; determines a second SIB1 based on the quantization angle information of the first SSB, the second SIB1 being one of the multiple SIB1s; the terminal device receives the second SIB1 based on the time-frequency resource pattern information corresponding to multiple SIB1s. The terminal device can determine the time-frequency pattern information of multiple SIB1s associated with the first SSB according to the first information, and determine the second SIB1 according to the quantization angle information of the first SSB, so that the terminal device can accurately receive the second SIB1.

In a possible implementation, the first quantization rule corresponding to the quantization angle information of the first SSB is predefined. This solution can reduce the amount of information carried by the first SSB and improve the reliability of the first SSB.

In another possible implementation, the first SSB further includes a first quantization rule corresponding to the quantization angle information of the first SSB. This approach is more flexible.

In the embodiment of the present application, the second SIB1 is carried on the predefined time-frequency resources. This solution can reduce the amount of information carried in the second SIB1 and improve the reliability of the second SIB1.

In the embodiment of the present application, the second SIB1 includes quantization angle information of the second SIB1 and third information, and the third information is used to determine the time-frequency resources of multiple random access channels associated with the second SIB1.

In an embodiment of the present application, the method further includes: the terminal device determines the time-frequency resource pattern information of multiple random access channels associated with the second SIB1 according to the third information; the terminal device determines the time-frequency resources of multiple random access channels associated with the second SIB1 according to the time-frequency resource pattern information of multiple random access channels associated with the second SIB1; the terminal device determines the second random access channel according to the quantization angle information of the second SIB1, and the second random access channel is one of the multiple random access channels associated with the second SIB1; the terminal device sends a random access request from the second random access channel. The terminal device can determine the time-frequency resources of multiple PRACHs associated with the second SIB1 according to the third information, determine the second random access channel according to the quantization angle information of the second SIB1, and then send a random access message from the second PRACH to complete random access.

In an embodiment of the present application, the third information includes one or more of the following information: the number of multiple random access channels associated with the second SIB1, the beam width of each random access channel in the multiple random access channels associated with the second SIB1 relative to the second SIB1, the frequency fraction corresponding to the multiple random access channels associated with the second SIB1, or the time fraction corresponding to the multiple random access channels associated with the second SIB1. The terminal device can determine the time-frequency resource pattern information of the multiple random access channels associated with the second SIB1 according to the relatively simplified third information.

In a possible implementation, the second quantization rule corresponding to the quantization angle information of the second SIB1 is predefined. This solution can reduce the amount of information carried by the second SIB1 and improve the reliability of the second SIB1.

In another possible implementation, the second SIB1 further includes a second quantization rule corresponding to the quantization angle information of the second SIB1. This approach is more flexible.

In an embodiment of the present application, the collection of beam ranges corresponding to each SIB1 in multiple SIB1s associated with the first SSB is a subset of the beam range corresponding to the first SSB.

In one embodiment of the present application, a collection of beam ranges corresponding to each of the multiple PRACHs associated with each SIB1 in multiple SIB1s is a subset of the beam range corresponding to each SIB1.

In a fourth aspect, the method may be executed by a network device, or by a component of the network device, such as a processor, chip, or chip system of the network device, or may be implemented by a logic module or software that can implement all or part of the functions of the network device. Taking the method as an example that the method can be executed by a network device, the method includes: the network device sends a first synchronization/broadcast signal block SSB, the first SSB includes first information, the first information is used to receive a plurality of SIB1s or one SIB1 among a plurality of SIB1s, the first information includes one or more of the following: the number of the plurality of SIB1s, the beam width of each SIB1 among the plurality of SIB1s relative to the first SSB, the frequency division corresponding to the plurality of SIB1s, or the time division corresponding to the plurality of SIB1s; the network device sends a plurality of SIB1s associated with the first SSB.

In the synchronization method provided by the embodiment of the present application, the first SSB includes first information for determining a reception strategy of multiple SIB1s associated with the first SSB, so that the terminal device can receive multiple SIB1s associated with the first SSB or one SIB1 among multiple SIB1s according to the first information. The network device can dynamically adjust the number of multiple SIB1s associated with the first SSB according to the user distribution to improve the coverage capability of SIB1.

In a possible implementation, the first information is used to determine the time-frequency resource pattern information corresponding to the multiple SIB1s; the network device sends the multiple SIB1s, including: the network device sends the multiple SIB1s according to the time-frequency resource pattern information corresponding to the multiple SIB1s. The network device can send the multiple SIB1s according to the time-frequency resource pattern information corresponding to the multiple SIB1s.

In the embodiment of the present application, multiple SIB1s are carried on predefined resources, which can reduce the amount of information carried in the first SSB and improve the reliability of the first SSB.

In the embodiment of the present application, the multiple SIB1s include a first SIB1, the first SIB1 includes second information, and the second information is used to determine the time-frequency resources of one or more random access channels PRACH associated with the first SIB1.

In an embodiment of the present application, the method further includes: the network device receives a random access request from a first PRACH, wherein the first PRACH is a PRACH associated with the first SIB1 or one of multiple PRACHs associated with the first SIB1. The network device can receive a random access message sent by the terminal device from the first PRACH, thereby completing random access of the terminal device.

In an embodiment of the present application, the first SIB1 includes second information, and the second information includes one or more of the following: the number of multiple PRACHs associated with the first SIB1, the beam width of each PRACH in the multiple PRACHs associated with the first SIB1 relative to the first SIB1, the frequency division number corresponding to the multiple PRACHs associated with the first SIB1, or the time division number corresponding to the multiple PRACHs associated with the first SIB1. This solution allows the terminal device to determine the time-frequency resource pattern information of the multiple PRACHs associated with the first SIB1 based on the relatively simplified second information, that is, the first SIB1 sent by the network device carries less information and the reliability of the first SIB1 is higher.

In another possible implementation, the first SSB also includes quantized angle information of the first SSB. This solution enables the terminal device to perform angle estimation more accurately according to the quantized angle information of the first SSB, and then determine the second SIB1.

In an embodiment of the present application, a network device sends multiple SIB1s, including: the network device sends multiple SIB1s according to the time-frequency resource pattern information corresponding to the multiple SIB1s; wherein the multiple SIB1s include a second SIB1, the quantization angle information of the first SSB is used to determine the second SIB1, and the first information is used to determine the time-frequency resource pattern information corresponding to the multiple SIB1s. This solution allows the terminal device to determine the time-frequency pattern information of multiple SIB1s associated with the first SSB according to the first information, and determine the second SIB1 according to the quantization angle information of the first SSB, thereby allowing the terminal device to accurately receive the second SIB1.

In a possible implementation, the first quantization rule corresponding to the quantization angle information of the first SSB is predefined. This solution can reduce the amount of information carried by the first SSB and improve the reliability of the first SSB.

In another possible implementation, the first SSB further includes a first quantization rule corresponding to the quantization angle information of the first SSB. This approach is more flexible.

In the embodiment of the present application, the second SIB1 is carried on predefined resources, which can reduce the amount of information carried in the second SIB1 and improve the reliability of the second SIB1.

In the embodiment of the present application, the second SIB1 includes quantization angle information of the second SIB1 and third information, and the third information is used to determine the time-frequency resources of multiple PRACHs associated with the second SIB1.

In an embodiment of the present application, the method further includes: the network device receives a random access request from a second random access channel; wherein the time-frequency resources of multiple PRACHs associated with the second SIB1 are determined according to the time-frequency resource pattern information of multiple PRACHs associated with the second SIB1, the time-frequency resource pattern information of multiple PRACHs associated with the second SIB1 is determined according to third information, and the second random access channel is determined from multiple PRACHs associated with the second SIB1 according to the quantization angle information of the second SIB1. The network device can receive a random access message from the second PRACH, thereby completing random access of the terminal device.

In an embodiment of the present application, the third information includes one or more of the following information: the number of multiple PRACHs associated with the second SIB1, the beam width of each random access channel in the multiple PRACHs associated with the second SIB1 relative to the second SIB1, the frequency division number corresponding to the multiple PRACHs associated with the second SIB1, or the time division number corresponding to the multiple PRACHs associated with the second SIB1. This solution allows the terminal device to determine the time-frequency resource pattern information of the multiple PRACHs associated with the second SIB1 based on the relatively simplified third information, that is, the second SIB1 sent by the network device carries less information and the reliability of the second SIB1 is higher.

In a possible implementation, the second quantization rule corresponding to the quantization angle information of the second SIB1 is predefined. This solution can reduce the amount of information carried by the second SIB1 and improve the reliability of the second SIB1.

In another possible implementation, the second SIB1 includes a second quantization rule corresponding to the quantization angle information of the second SIB1. This approach is more flexible.

In an embodiment of the present application, the collection of beam ranges corresponding to each SIB1 in multiple SIB1s associated with the first SSB is a subset of the beam range corresponding to the first SSB.

In the embodiment of the present application, the collection of beam ranges corresponding to each of the multiple PRACHs associated with each SIB1 in the multiple SIB1s is a subset of the beam range corresponding to each SIB1.

In a fifth aspect, the method may be executed by a terminal device, or by a component of the terminal device, such as a processor, chip, or chip system of the terminal device, or may be implemented by a logic module or software that can implement all or part of the functions of the terminal device. Taking the method as an example that the method can be executed by a terminal device, the method includes: the terminal device receives a first synchronization/broadcast signal block SSB, the first SSB is associated with a third system message block SIB1, the third SIB1 includes fourth information, and the fourth information is used to determine the time-frequency resources of multiple random access channels PRACH associated with the third SIB1; the terminal device receives the third SIB1.

The synchronization method provided in the embodiment of the present application includes a third SIB1 for determining multiple PRACHs associated with the third SIB1. The fourth information of time-frequency resources enables the terminal device to determine the time-frequency resources of multiple PRACHs associated with the third SIB1.

In the embodiment of the present application, the fourth information includes one or more of the following: the number of multiple PRACHs associated with the third SIB1, the beamwidth of each random access channel of the multiple PRACHs associated with the third SIB1 relative to the third SIB1, the frequency division number corresponding to the multiple PRACHs associated with the first SIB1, or the time division number of the multiple PRACHs associated with the third SIB1. The terminal device can determine the time-frequency resources of the multiple PRACHs associated with the third SIB1 according to the relatively simplified fourth information.

In an embodiment of the present application, the method further includes: the terminal device determines the time-frequency resources of multiple PRACHs associated with the third SIB1 according to the fourth information; and sends a random access request from the third PRACH, wherein the third PRACH is one of the multiple PRACHs associated with the third SIB1. This solution allows the terminal device to determine the time-frequency resources of multiple PRACHs associated with the third SIB1 according to the fourth information, and then send a random access message from the third PRACH to complete random access.

In the embodiment of the present application, the third SIB1 also includes quantized angle information of the third SIB1. This solution enables the terminal device to perform angle estimation more accurately according to the quantized angle information of the third SIB1, and then determine the third PRACH.

In an embodiment of the present application, the method further includes: the terminal device determines the time-frequency resource pattern information corresponding to the multiple PRACHs associated with the third SIB1 according to the fourth information; the terminal device determines the time-frequency resources of the multiple PRACHs associated with the third SIB1 according to the time-frequency resource pattern information of the multiple PRACHs associated with the third SIB1; the terminal device determines the third PRACH according to the quantization angle information of the third SIB1, wherein the third PRACH is one of the multiple PRACHs associated with the third SIB1; and sends a random access request from the third PRACH according to the time-frequency resource pattern information corresponding to the multiple PRACHs associated with the third SIB1. This scheme can enable the terminal device to determine the time-frequency resources of the multiple PRACHs associated with the third SIB1 according to the fourth information, determine the third PRACH according to the quantization angle information of the third SIB1, and then send a random access message from the third PRACH to complete random access.

In a possible implementation, the third quantization rule corresponding to the quantization angle information of the third SIB1 is predefined. This solution can reduce the amount of information carried by the third SIB1 and improve the reliability of the third SIB1.

In another possible implementation manner, the third SIB1 further includes a third quantization rule corresponding to the quantization angle information of the third SIB1. This manner is more flexible.

In the embodiment of the present application, the set of beam ranges corresponding to each PRACH in the multiple PRACHs associated with the third SIB1 is a subset of the beam range corresponding to the third SIB1.

In a sixth aspect, the method may be executed by a network device, or by a component of the network device, such as a processor, chip, or chip system of the network device, or may be implemented by a logic module or software that can implement all or part of the functions of the network device. Taking the method as an example that the method can be executed by a network device, the method includes: the network device sends a first synchronization/broadcast signal block SSB, the first SSB is associated with a third system message block SIB1, the third SIB1 includes fourth information, and the fourth information is used to determine the resources of multiple random access channels PRACH associated with the third SIB1; the network device sends the third SIB1.

In the synchronization method provided in the embodiment of the present application, the third SIB1 includes fourth information for determining the time-frequency resources of multiple PRACHs associated with the third SIB1, so that the terminal device determines the time-frequency resources of multiple PRACHs associated with the third SIB1.

In the embodiment of the present application, the fourth information includes one or more of the following: the number of multiple PRACHs associated with the third SIB1, the beam width of each PRACH in the multiple PRACHs associated with the third SIB1 relative to the third SIB1, the frequency division number corresponding to the multiple PRACHs associated with the first SIB1, or the time division number corresponding to the multiple PRACHs associated with the third SIB1. This solution allows the terminal device to determine the time-frequency resources of the multiple PRACHs associated with the third SIB1 based on the relatively simplified fourth information, that is, the amount of information carried by the third SIB1 sent by the network device is relatively small, and the reliability of the third SIB1 is relatively high.

In an embodiment of the present application, the method further includes: the network device receives a random access request from a third PRACH according to the time-frequency resource pattern information of multiple PRACHs associated with the third SIB1, wherein the time-frequency resource pattern information of multiple PRACHs associated with the third SIB1 is determined according to the fourth information, and the third PRACH is one of the multiple PRACHs associated with the third SIB1. This solution can enable the network device to complete random access of the terminal device.

In the embodiment of the present application, the third SIB1 also includes quantized angle information of the third SIB1. This solution enables the terminal device to perform angle estimation more accurately according to the quantized angle information of the third SIB1, and then determine the third PRACH.

In the embodiment of the present application, the method further includes: the network device receives a random access request on the third PRACH according to the time-frequency resource pattern information of multiple PRACHs associated with the third SIB1; wherein the time-frequency resource pattern information of multiple PRACHs associated with the third SIB1 is determined according to the fourth information, and the third PRACH is determined from the multiple PRACHs associated with the third SIB1 according to the quantization angle information of the third SIB1. The network device can complete the random access of the terminal device.

In a possible implementation, the third quantization rule corresponding to the quantization angle information of the third SIB1 is predefined. The amount of information carried by the third SIB1 is reduced, thereby improving the reliability of the third SIB1.

In another possible implementation manner, the third SIB1 further includes a third quantization rule corresponding to the quantization angle information of the third SIB1. This manner is more flexible.

In the embodiment of the present application, the set of beam ranges corresponding to each PRACH in the multiple PRACHs associated with the third SIB1 is a subset of the beam range corresponding to the third SIB1.

In a seventh aspect, a communication device is provided for implementing the above-mentioned various methods. The communication device may be the terminal device in the first aspect, the third aspect, or the fifth aspect, or a device included in the terminal device, such as a chip; or the communication device may be the network device in the second aspect, the fourth aspect, or the sixth aspect, or a device included in the network device, such as a chip.

The communication device includes a module, unit, or means corresponding to the above method, which can be implemented by hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions.

In some possible designs, the communication device may include a processing module and a communication module. The communication module may include an output module (or a sending module) and an input module (or a receiving module), respectively used to implement the output-type (or sending-type) and input-type (or receiving-type) functions in any of the above aspects and any possible designs thereof. The processing module may be used to implement the processing functions in any of the above aspects and any possible designs thereof.

Optionally, the communication device further comprises a storage module for storing program instructions and data.

In an eighth aspect, a communication device is provided, comprising: at least one processor, the processor being used to run a computer program or instruction, or being used to enable the communication device to execute the method described in any of the above aspects through a logic circuit. The communication device may be a terminal device in the first aspect, the third aspect, or the fifth aspect, or a device included in the terminal device, such as a chip; or the communication device may be a network device in the second aspect, the fourth aspect, or the sixth aspect, or a device included in the network device, such as a chip.

In some possible designs, the communication device further includes a memory for storing computer instructions and/or configuration files of logic circuits. Optionally, the memory is integrated with the processor, or the memory is independent of the processor.

In a possible design, the communication device further includes a communication interface for inputting and/or outputting signals.

In some possible designs, the communication interface is an interface circuit for reading and writing computer instructions. For example, the interface circuit is used to receive computer execution instructions (computer execution instructions are stored in a memory, may be read directly from the memory, or may pass through other devices) and transmit them to the processor.

In some possible designs, the communication interface is used to communicate with modules outside the communication device.

In some possible designs, the communication device may be a chip system. Wherein, when the communication device is a chip system, the chip system may include a chip, or may include a chip and other discrete devices.

In a ninth aspect, a communication device is provided, comprising: a logic circuit and an interface circuit; the interface circuit is used to input information and/or output information; the logic circuit is used to execute the method described in any of the above aspects, and process and/or generate output information according to the input information. The communication device can be the terminal device in the first aspect, the third aspect, or the fifth aspect, or a device included in the terminal device, such as a chip; or the communication device can be the network device in the second aspect, the fourth aspect, or the sixth aspect, or a device included in the network device, such as a chip.

It can be understood that when the communication device provided in any one of the seventh to ninth aspects is a chip, the above-mentioned sending action/function can be understood as output information, and the above-mentioned receiving action/function can be understood as input information.

In a tenth aspect, a computer-readable storage medium is provided, in which a computer program or instruction is stored. When the computer program or instruction is executed by a processor, the method described in any one of the above aspects is executed.

In an eleventh aspect, a computer program product is provided, which, when executed by a processor, enables the method described in any one of the above aspects to be executed.

In the twelfth aspect, a communication device is provided, which includes a module/unit for executing the methods described in the first and second aspects above, or the communication device includes a module/unit for executing the methods described in the third and fourth aspects above, and the communication device includes a module/unit for executing the methods described in the fifth and sixth aspects above.

In a thirteenth aspect, a communication system is provided, the communication system comprising the terminal device described in the first aspect and the network device described in the second aspect, the communication system comprising the terminal device described in the third aspect and the network device described in the fourth aspect, The communication system includes the terminal device described in the fifth aspect and the network device described in the sixth aspect. The terminal device and the network device can be implemented as the communication device provided in any one of the seventh to ninth aspects.

Among them, the technical effects brought about by any design method in the seventh to thirteenth aspects can be referred to the technical effects brought about by different design methods in the first and second aspects, or the third and fourth aspects, or the fifth and sixth aspects, and will not be repeated here.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a downlink synchronization and random access process;

FIG2 is a schematic diagram of the SSB time domain position;

FIG3 is a schematic diagram of a communication system provided in an embodiment of the present application;

FIG4 is a schematic diagram of the structure of a communication device 400 provided in an embodiment of the present application;

FIG5 is a schematic diagram of an example of a synchronization method provided in an embodiment of the present application;

FIG6 is a schematic diagram of a time-frequency pattern of multiple SIB1s associated with a first SSB provided in an embodiment of the present application;

FIG7 is a schematic diagram of another time-frequency pattern of multiple SIB1s associated with a first SSB provided in an embodiment of the present application;

FIG8 is a schematic diagram of a first SSB beam and a plurality of SIB1 beams associated with the first SSB provided in an embodiment of the present application;

FIG9 is a schematic diagram of an example of a synchronization method provided in an embodiment of the present application;

FIG10 is a schematic diagram of a first SIB1 and a first PRACH provided in an embodiment of the present application;

FIG11 is a schematic diagram of a first SIB1 and multiple PRACHs provided in an embodiment of the present application;

FIG12 is a schematic diagram of another example of a synchronization method provided in an embodiment of the present application;

FIG13 is a schematic diagram of another example of a synchronization method provided in an embodiment of the present application;

FIG14 is a schematic diagram of the correspondence between the third SIB1 and multiple PRACHs provided in an embodiment of the present application;

FIG. 15 is a schematic diagram of a communication device provided in an embodiment of the present application.

DETAILED DESCRIPTION

In the description of this application, unless otherwise specified, "/" indicates that the objects associated with each other are in an "or" relationship, for example, A/B can represent A or B; "and/or" in this application is merely a description of the association relationship between associated objects, indicating that three relationships may exist, for example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.

In the description of this application, unless otherwise specified, "plurality" means two or more than two. "The following one or more (items) or similar expressions refer to any combination of these items, including any combination of single items (items) or plural items (items). For example, at least one item (item) of a, b and (or) c can be represented by: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or plural.

In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same items or similar items with substantially the same functions and effects. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit the difference.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way for easy understanding.

It is understood that the "embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the various embodiments in the entire specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It is understood that in various embodiments of the present application, the size of the sequence number of each process does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

It can be understood that in the present application, "when" and "if" both mean that corresponding processing will be carried out under certain objective circumstances, and do not limit the time, nor do they require any judgment action when implementing, nor do they mean the existence of other limitations.

It is understood that some optional features in the embodiments of the present application may not rely on other features in certain scenarios, such as the solutions on which they are currently based, and may be implemented independently to solve corresponding technical problems and achieve corresponding effects. In the scenario, it is combined with other features according to the needs. Correspondingly, the device given in the embodiment of the present application can also realize these features or functions accordingly, which will not be repeated here.

In this application, unless otherwise specified, the same or similar parts between the various embodiments can refer to each other. In the various embodiments of this application, if there is no special description and logical conflict, the terms and/or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships. The implementation methods of this application described below do not constitute a limitation on the scope of protection of this application. To facilitate the reader's understanding, the relevant technologies of the embodiments of this application are introduced below:

1. Downlink synchronization and random access process.

In the new radio (NR) standard of the fifth generation wireless communication system (5G), network equipment periodically sends SSB, which carries relevant information indicating the time-frequency resources carrying SIB1. Terminal equipment receives SIB1 on the corresponding time-frequency resources according to the indication of the relevant information carried in the SSB; SIB1 carries relevant information indicating the mapping relationship between an SSB and a random access channel occasion (RO). Terminal equipment sends a random access message from PRACH on the time-frequency resources of the corresponding PRACH according to the relevant information carried in SIB1, thereby completing the downlink synchronization and random access process.

Figure 1 is a schematic diagram of a downlink synchronization and random access process. As shown in Figure 1, the downlink synchronization and random access process includes the following steps:

Step 1: The network device periodically sends SSB.

The SSB transmission period that the network device can configure includes {5, 10, 20, 40, 80, 160} milliseconds (ms). As shown in Figure 2, it is a schematic diagram of the SSB time domain position. Taking the SSB transmission period of 20ms as an example, the transmission of SSB in each SSB transmission period is completed within 5ms. Each SSB is carried on an SSB beam. For the case of multiple beams, the network device will complete the coverage scan of the entire cell within 5ms in each SSB transmission period, that is, the SSB index set is (For example, M=16), the network device uses the beam corresponding to SSB _Bi to send the i-th (i=0, 1, ...) SSB in each SSB transmission cycle, completing the SSB beam coverage of the cell and ensuring that terminal devices at different locations in the communication system can receive the SSB broadcast.

Correspondingly, the terminal device performs beam scanning to receive the SSB, and the terminal device may select an SSB according to the signal strength of the received SSB, for example, the terminal device selects SSB B ₁ .

Step 2: The network device sends SIB1.

Similar to the network device sending SSB, the network device uses the beam corresponding to each SIB1 to send the corresponding SIB1 to ensure that terminal devices at different locations in the communication system can receive SIB1. Each SSB carries a master information block (MIB) to indicate the relevant information of the time-frequency resources carrying SIB1. Since the direction of the beam used by the network device to send SSB corresponds to the direction of the beam used to send SIB1, the terminal device can indicate the relevant information of the time-frequency resources carrying SIB1 in the SSB it selects to receive SIB1 on the corresponding time-frequency resources. For example, if the terminal device selects SSB B ₁ , the terminal device can use the beam that receives SSB B ₁ to receive the corresponding SIB1.

Step 3: The terminal device completes random access.

SIB1 includes relevant information indicating the mapping relationship between the time-frequency resources of SSB and PRACH. The terminal device can determine the time-frequency resources of the PRACH corresponding to the SSB based on the relevant information indicating the mapping relationship between the time-frequency resources of SSB and PRACH, and send a random access message from the PRACH on the time-frequency resources of the PRACH. The direction of the beam used by the network device to receive PRACH is consistent with the direction of the beam used to send the corresponding SSB, and the direction of the beam used by the terminal device to send PRACH is consistent with the direction of the beam used to receive the corresponding SSB. Therefore, the network device and the terminal can be aligned to complete the downlink synchronization and random access process of the terminal device.

Fig. 3 is a schematic diagram of a communication system provided in an embodiment of the present application. As shown in Fig. 3, the communication system mainly includes a network device and a terminal device, wherein the network device may be one or more, and the terminal device may be one or more. In the communication system shown in Fig. 3 of the embodiment of the present application, the communication system includes one network device and one terminal device as an example.

Optionally, the embodiments of the present application can be applied to the fifth generation mobile communication technology (5th generation, 5G), and can also be applied to other communication systems, such as the future sixth generation mobile communication technology (6th generation, 6G), etc., and the embodiments of the present application do not make specific limitations on this.

Optionally, the terminal device involved in the present application may be a 5G network or a public land mobile network (public land mobile network) evolved after 5G. The invention relates to user equipment (UE), access terminal, terminal unit, user station, terminal station, mobile station, mobile station, remote station, remote terminal, user terminal terminal equipment (TE) in a wireless land mobile network (PLMN), mobile device, wireless communication device, terminal agent, tablet computer (pad), handheld device with wireless communication function, computing device or other processing device connected to a wireless modem, vehicle-mounted device, vehicle-mounted transceiver unit, wearable device, or terminal device. The access terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a drone, a robot, a smart point of sale (POS) machine, a customer-premises equipment (CPE) or a wearable device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, an industrial control ( The terminal may be a wireless terminal in a vehicle control system, a wireless terminal in a self-driving system, a wireless terminal in a remote medical system, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. Alternatively, the terminal may be a terminal with a communication function in the Internet of Things (IoT), such as a terminal in a V2X system (such as a vehicle networking device), a terminal in a D2D communication system, or a terminal in an M2M communication system. The terminal may be mobile or fixed.

Optionally, the network device involved in the present application may be a device for communicating with a terminal device, for example, it may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in an LTE system or an LTE-A system, such as a traditional macro base station eNB and a micro base station eNB in a heterogeneous network scenario. Alternatively, it may include a next generation node B (next generation node B, gNB) in an NR system. Alternatively, it may include a transmission reception point (TRP), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a baseband unit (base band unit, BBU), a baseband pool (BBU pool), or a wireless fidelity (wireless fidelity, WiFi) access point (access point, AP), etc. Alternatively, it may include a base station in a non-terrestrial network (NTN), that is, it may be deployed on a flying platform or a satellite. In the NTN, the network device may be a layer 1 (L1) relay, or a base station, or an integrated access and backhaul (IAB) node. Alternatively, the network device may be a device that implements the base station function in IoT, such as a device that implements the base station function in drone communications, V2X, D2D, or machine to machine (M2M).

In some possible scenarios, the network equipment may also be a module or unit that can implement some functions of the base station. For example, the access network equipment may be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU may be set separately, or may be included in the same network element, such as a baseband unit (BBU). The RU may be included in a radio frequency device or radio unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, the access network device may be a network device or a module of a network device in an open radio access network (open RAN, ORAN) system. In the ORAN system, CU may also be referred to as open (open, O)-CU, DU may also be referred to as O-DU, CU-CP may also be referred to as O-CU-CP, CU-UP may also be referred to as O-CU-UP, and RU may also be referred to as O-RU. Any of the CU (or CU-CP, CU-UP), DU and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

Optionally, the base station in the embodiments of the present application may include various forms of base stations, such as: macro base stations, micro base stations (also called small stations), relay stations, access points, home base stations, TRPs, transmitting points (TP), mobile switching centers, etc., and the embodiments of the present application do not make specific limitations on this.

It should be noted that the communication system described in the embodiment of the present application is for the purpose of more clearly illustrating the technical solution of the embodiment of the present application, and does not constitute a limitation on the technical solution provided in the embodiment of the present application. A person of ordinary skill in the art can know that with the evolution of network architecture and the emergence of new business scenarios, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

Optionally, the functions of the network device and the terminal device involved in the present application can be implemented by one device, or by multiple devices, or by one or more functional modules in one device, or by one or more chips, or by a system on chip (SOC) or a chip system. The chip system can be composed of chips, or by multiple chips. Including chips and other discrete devices, the embodiments of the present application do not specifically limit this.

It is understandable that the above functions can be network elements in hardware devices, software functions running on dedicated hardware, or a combination of hardware and software, or virtualized functions instantiated on a platform (e.g., a cloud platform).

For example, the relevant functions of the network device and the terminal device involved in the present application can be implemented by the communication device 400 in Figure 4. Figure 4 is a schematic diagram of the structure of the communication device 400 provided in an embodiment of the present application. The communication device 400 includes one or more processors 401, a communication line 402, and at least one communication interface (Figure 4 is only exemplary to include a communication interface 404 and a processor 401 as an example for explanation), and optionally may also include a memory 403.

Processor 401 can be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present application.

The communication line 402 may include a path for connecting different components.

The communication interface 404 may be a transceiver module for communicating with other devices or communication networks, such as Ethernet, RAN, wireless local area networks (WLAN), etc. For example, the transceiver module may be a device such as a transceiver or a transceiver. Optionally, the communication interface 404 may also be a transceiver circuit located in the processor 401 to implement signal input and signal output of the processor.

The memory 403 may be a device with a storage function. For example, it may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory may exist independently and be connected to the processor via the communication line 402. The memory may also be integrated with the processor.

The memory 403 is used to store computer-executable instructions for executing the solution of the present application, and the execution is controlled by the processor 401. The processor 401 is used to execute the computer-executable instructions stored in the memory 403, thereby realizing the synchronization method provided in the embodiment of the present application.

Alternatively, optionally, in an embodiment of the present application, the processor 401 may also perform processing-related functions in the synchronization method provided in the following embodiments of the present application, and the communication interface 404 is responsible for communicating with other devices or communication networks, which is not specifically limited in the embodiments of the present application.

Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application code, which is not specifically limited in the embodiments of the present application.

In a specific implementation, as an embodiment, the processor 401 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 4 .

In a specific implementation, as an embodiment, the communication device 400 may include multiple processors, such as the processor 401 and the processor 407 in FIG. 4 . Each of these processors may be a single-core processor or a multi-core processor. The processors here may include but are not limited to at least one of the following: a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a microcontroller (MCU), or an artificial intelligence processor, etc., and each computing device may include one or more cores for executing software instructions to perform calculations or processing.

In a specific implementation, as an embodiment, the communication device 400 may further include an output device 405 and an input device 406. The output device 405 communicates with the processor 401 and may display information in a variety of ways. For example, the output device 405 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. The input device 406 communicates with the processor 401 and may receive user input in a variety of ways. For example, the input device 406 may be a mouse, a keyboard, a touch screen device, or a sensor device.

The communication device 400 may also be referred to as a communication apparatus, which may be a general-purpose device or a dedicated device. For example, the communication device 400 may be a desktop computer, a portable computer, a network server, a PDA (personal digital assistant, PDA), mobile phone, tablet computer, wireless terminal device, embedded device, the above terminal, the above network device, or a device with a similar structure as shown in FIG4. The embodiment of the present application does not limit the type of the communication device 400.

In addition, the composition structure shown in FIG4 does not constitute a limitation on the communication device. In addition to the components shown in FIG4, the communication device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

The synchronization method provided in the embodiment of the present application is described below in conjunction with the communication system shown in FIG. 3 .

It should be noted that in the following embodiments of the present application, the message names between network elements, the names of parameters, or the names of information are only examples. In other embodiments, they may also be other names, and the method provided in the present application does not make any specific limitations on this.

It is understandable that in the embodiment of the present application, each network element may perform some or all of the steps in the embodiment of the present application, and these steps or operations are only examples. The embodiment of the present application may also perform other operations or variations of various operations. In addition, each step may be performed in a different order presented in the embodiment of the present application, and it is possible that not all operations in the embodiment of the present application need to be performed.

FIG5 is a schematic diagram of an example of a synchronization method provided by an embodiment of the present application. The method is illustrated by taking the interaction between a terminal device and a network device as an example. Of course, the subject that executes the terminal device action in the method can also be a device/module in the terminal device, such as a chip, a processor, a processing unit, etc. in the terminal device; the subject that executes the network device action in the method can also be a device/module in the network device, such as a chip, a processor, a processing unit, etc. in the network device, which is not specifically limited in the embodiment of the present application. The processing performed by a single execution subject (for example, a network device or a terminal device) in the embodiment of the present application can also be divided into execution by multiple execution subjects, which can be logically and/or physically separated. For example, the processing performed by the network device can be divided into execution by at least one of a CU, a DU, and a RU; for another example, the processing performed by the network device can be divided into execution by at least one of an O-CU (O-CU-CP in an O-CU or O-CU-UP in an O-CU), an O-DU, and an O-RU in an ORAN system. Exemplarily, as shown in FIG5, the synchronization method 500 provided in an embodiment of the present application includes:

S510, the network device sends a first SSB to the terminal device. Correspondingly, the terminal device receives the first SSB from the network device.

In the embodiment of the present application, the terminal device receiving the first SSB from the network device can be understood as the terminal device selecting the first SSB from multiple SSBs sent by the network device introduced in the above-mentioned related technology. It should be noted that in the following embodiments, the first SSB, multiple SIB1s associated with the first SSB, and one or more PRACHs associated with each SIB1 all correspond to the same cell.

In an embodiment of the present application, the first SSB may include first information, and the first information is used to determine a receiving strategy for multiple SIB1s associated with the first SSB. Exemplarily, the receiving strategy for multiple SIB1s associated with the first SSB may be that the terminal device receives multiple SIB1s associated with the first SSB or one SIB1 among multiple SIB1s.

In a possible implementation, the first information may include one or more of the following: the number of multiple SIB1s associated with the first SSB, the beamwidth of each SIB1 in the multiple SIB1s associated with the first SSB relative to the first SSB, the frequency division number corresponding to the multiple SIB1s associated with the first SSB (for example, the number of frequency-divided resources), or the time division number corresponding to the multiple SIB1s associated with the first SSB (for example, the number of time-divided resources). Of course, the first information in the embodiment of the present application may also include other relevant information, which is not limited in the embodiment of the present application.

It should be noted that the beam width of each SIB1 among the multiple SIB1s associated with the first SSB relative to the first SSB can be understood as the width of the beam used by the network device to send each SIB1 relative to the width of the beam used by the network device to send the first SSB, wherein the direction of the beam used by the network device may include the horizontal transmission angle (azimuth angle of departure, AOD) direction and the elevation transmission angle (zenith angle of departure, ZOD) direction.

In an embodiment of the present application, the terminal device can determine the time-frequency resource pattern information of multiple SIB1s associated with the first SSB based on the first information. The time-frequency resource pattern information of multiple SIB1s associated with the first SSB can indicate the frequency fractions and/or time fractions corresponding to the multiple SIB1s associated with the first SSB.

In an embodiment of the present application, the frequency division number corresponding to the multiple SIB1s associated with the first SSB can be understood as the number of multiple SIB1s associated with the first SSB that are simultaneously sent on different frequency units. For example, the first SSB is associated with 3 SIB1s, and the network device can simultaneously send these 3 SIB1s on the resources corresponding to 3 different frequency units, that is, send the multiple SIB1s associated with the first SSB in a frequency division manner. This can reduce the latency of the network device in sending the multiple SIB1s associated with the first SSB, which is beneficial to reducing the energy consumption of the network device and the energy consumption of the terminal device for random access based on the information of SIB1, and is beneficial to energy saving of the system.

In the embodiment of the present application, the time division number corresponding to the multiple SIB1s associated with the first SSB can be understood as the number of multiple SIB1s associated with the first SSB with the same frequency sent in different time units (such as symbols in time division multiplexing transmission). The first SSB is associated with three SIB1s. The network device can send three SIB1s with the same frequency on resources corresponding to three different time units, that is, send multiple SIB1s associated with the first SSB in sequence using a time division method.

Exemplarily, as shown in FIG6, a schematic diagram of a time-frequency pattern of multiple SIB1s associated with a first SSB provided in an embodiment of the present application, the first SSB may be SSB0 in FIG6, SSB0 may be associated with SIB1(0) and SIB1(1), and the dimension of the corresponding time-frequency resource pattern information is 1×2, that is, the frequency fraction is 2. Alternatively, exemplarily, as shown in FIG7, another schematic diagram of a time-frequency pattern of multiple SIB1s associated with a first SSB provided in an embodiment of the present application, the first SSB may be SSB0 in FIG7, SSB0 may be associated with SIB1(0) and SIB1(1), and the dimension of the corresponding time-frequency resource pattern information is 2×1, and the instant fraction is 2. It should be understood that the number of multiple SIB1s associated with each SSB may be the same or different, and the embodiment of the present application does not limit this. It should be noted that FIG6 and FIG7 take the example of the first SSB being sent in a frequency division manner as an example. Of course, the first SSB may also be sent in a time division manner, and the embodiment of the present application does not limit this.

Exemplarily, the terminal device may determine the time-frequency resource pattern information of the multiple SIB1s associated with the first SSB according to the number of the multiple SIB1s associated with the first SSB. For example, a set of time-frequency resource pattern information is predefined, and when the number of the multiple SIB1s associated with the first SSB is 2, the terminal device may determine the time-frequency resource pattern information of the two SIB1s associated with the first SSB according to the predefined time-frequency resource pattern information of the number of associated SIB1s being 2 (for example, the time-frequency resource pattern information shown in FIG6 or the time-frequency resource pattern information shown in FIG7); or, the terminal device may determine the time-frequency resource pattern information of the two SIB1s associated with the first SSB according to its own estimation (for example, estimating that the two SIB1s associated with the first SSB are sent in a frequency division manner, such as the time-frequency resource pattern information shown in FIG6, or estimating that the two SIB1s associated with the first SSB are sent in a time division manner, such as the time-frequency resource pattern information described in FIG7).

Exemplarily, the terminal device may determine the time-frequency resource pattern information of the multiple SIB1s associated with the first SSB based on the beam width of each SIB1 in the multiple SIB1s associated with the first SSB relative to the first SSB. For example, the terminal device determines that the number of the multiple SIB1s associated with the first SSB is 2 based on the beam width of each SIB1 in the multiple SIB1s associated with the first SSB being 1:2 relative to the first SSB. Further, the terminal device may determine the time-frequency resource pattern information of the two SIB1s associated with the first SSB using the above-mentioned example method. It should be understood that when the beam width of each SIB1 in the multiple SIB1s associated with the predefined first SSB is the same, since the first information only needs to indicate the beam width of one SIB1 relative to the first SSB (for example, 1:2), the amount of information carried by the first SSB can be reduced and the reliability of the first SSB can be improved; when the beam width of each SIB1 in the multiple SIB1s associated with the first SSB is different, since the first information needs to indicate the relative beam width of each first SIB1 (for example, 7:9; 2:9), the network device can allocate the beam width of SIB1 according to actual needs, which is more flexible.

Exemplarily, the terminal device can determine the time-frequency resource pattern information of multiple SIB1s associated with the first SSB according to the frequency fractions corresponding to the multiple SIB1s associated with the first SSB. For example, the frequency fraction corresponding to the multiple SIB1s associated with the first SSB is 2, and the terminal device can determine that the number of multiple SIB1s associated with the first SSB is 2, and can also determine the time-frequency resource pattern information of the two SIB1s associated with the first SSB (the time-frequency resource pattern information shown in FIG6 ).

Exemplarily, the terminal device can determine the time-frequency resource pattern information of multiple SIB1s associated with the first SSB according to the time division number corresponding to the multiple SIB1s associated with the first SSB. For example, the time division number corresponding to the multiple SIB1s associated with the first SSB is 2, and the terminal device can determine that the number of multiple SIB1s associated with the first SSB is 2, and can also determine the time-frequency resource pattern information of the two SIB1s associated with the first SSB (the time-frequency resource pattern information shown in FIG7 ).

Of course, the terminal device can determine the time-frequency resource pattern information of multiple SIB1s associated with the first SSB based on other information, and the embodiment of the present application does not limit this. In some embodiments, the other information can be included in the first information, or can be sent to the terminal device separately by the network device, or the terminal device can obtain it from other channels.

In another possible implementation, the first information may include time-frequency resource pattern information of multiple SIB1s associated with the first SSB, so that the terminal device directly obtains the time-frequency resource pattern information of multiple SIB1s associated with the first SSB, which simplifies the process of the terminal device. It should be understood that compared with the first information including the number of multiple SIB1s associated with the first SSB, or the beamwidth of each SIB1 in the multiple SIB1s associated with the first SSB relative to the first SSB, or the frequency division number corresponding to the multiple SIB1s associated with the first SSB, or the time division number corresponding to the multiple SIB1s associated with the first SSB, the scheme in which the first information includes the time-frequency resource pattern information of multiple SIB1s associated with the first SSB can reduce the amount of information that the first SSB needs to carry and improve the reliability of the first SSB.

As a possible implementation method, in an embodiment of the present application, the first SSB may not include the first information, predefine the number of multiple SIB1s associated with the first SSB, and/or, the beamwidth of each SIB1 of the multiple SIB1s associated with the first SSB relative to the first SSB, and/or, the frequency fraction corresponding to the multiple SIB1s associated with the first SSB, and/or, the multiple SIB1s associated with the first SSB The corresponding time division, and/or the time-frequency resource pattern information of multiple SIB1s associated with the first SSB, and/or other information used to determine the time-frequency resource pattern information of multiple SIB1s associated with the first SSB, are not limited in this embodiment of the present application. In this way, the terminal device determines the time-frequency resource pattern information of multiple SIB1s associated with the first SSB based on one or more of the above-mentioned predefined information, so that the terminal device can accurately receive the multiple SIB1s associated with the first SSB without adding additional information in the first SSB, thereby improving the reliability of the first SSB.

In an embodiment of the present application, the terminal device can determine the time-frequency resource pattern information of multiple SIB1s associated with the first SSB according to any one of the above-mentioned possible implementation methods. Further, the terminal device can determine the time-frequency resources carrying the multiple SIB1s associated with the first SSB according to the time-frequency resource pattern information of the multiple SIB1s associated with the first SSB, and receive the multiple SIB1s associated with the first SSB or one SIB1 among the multiple SIB1s on the time-frequency resources carrying the multiple SIB1s associated with the first SSB.

In one possible implementation, multiple SIB1s associated with the first SSB are carried on predefined resources. In other words, after determining the time-frequency resource pattern information of multiple SIB1s associated with the first SSB, the terminal device can determine the time-frequency resources for receiving multiple SIB1s based on the time-frequency resource pattern information of multiple SIB1s associated with the first SSB, and then receive multiple SIB1s associated with the first SSB on the time-frequency resources predefined by the protocol, which can reduce the amount of information carried in the first SSB and improve the reliability of the first SSB.

Exemplarily, a monitoring method for a common search space (CSS) of a physical downlink control channel (PDCCH) corresponding to multiple SIB1s associated with a first SSB is predefined (e.g., a Type0-PDCCH-CSS monitoring method). A terminal device may determine the time-frequency resources (e.g., control resource set (CORESET) CPRESET0) of multiple SIB1s associated with the first SSB based on the time-frequency resource pattern information of the multiple SIB1s associated with the first SSB. For example, the Type0-PDCCH-CSS monitoring method may be a monitoring method similar to a frequency range (FR) FR2-2 (i.e., 52.6 GHz-71 GHz) time slot group.

In another possible implementation, the first SSB includes relevant information indicating the time-frequency resources of multiple SIB1s associated with the first SSB, and the terminal device can receive the multiple SIB1s associated with the first SSB on the indicated time-frequency resources carrying the multiple SIB1s associated with the first SSB according to the indication information. The first SSB includes relevant information indicating the time-frequency resources of multiple SIB1s associated with the first SSB, which allows the network device to allocate the time-frequency resources carrying the multiple SIB1s associated with the first SSB as needed, which is more flexible.

S520, the network device sends multiple SIB1s associated with the first SSB to the terminal device. Correspondingly, the terminal device receives multiple SIB1s associated with the first SSB or one SIB1 among multiple SIB1s from the network device according to the first information.

In the embodiment of the present application, the set of beam ranges corresponding to each SIB1 in the multiple SIB1s associated with the first SSB is a subset of the beam range corresponding to the first SSB, wherein the beam range may refer to a set of beam directions within 3db difference from the beam peak, or, in other words, the width of the beam corresponding to the first SSB is less than or equal to the sum of the widths of the beams corresponding to each SIB1 in the multiple SIB1s associated with the first SSB. Exemplarily, the width of the beam corresponding to each SIB1 in the multiple first SIB1s associated with the first SSB may be the same, and when the width of the beam corresponding to the first SSB is equal to the sum of the widths of the beams of each SIB1 in the multiple SIB1s associated with the first SSB, the beam corresponding to each SIB1 in the multiple SIB1s associated with the first SSB divides the beam corresponding to the first SSB equally; or, exemplarily, the width of the beam corresponding to each SIB1 in the multiple SIB1s associated with the first SSB may be different, and the network device may select beams with different widths according to the number of terminal devices or energy-saving requirements, and this solution is more flexible. FIG8 is a schematic diagram of a first SSB beam and multiple SIB1 beams associated with the first SSB provided in an embodiment of the present application. As shown in FIG8 , the first SSB is associated with two SIB1s, and the width of the beam corresponding to the first SSB is equal to a subset of the beam range corresponding to each of the two SIB1s associated with the first SSB, wherein the width of the beam of each SIB1 is equal and is 1/2 of the width of the beam of the first SSB. The directional range of the beam corresponding to the first SSB sent by the network device covers the directional range of the two SIB1s associated with the first SSB sent by the network device. Taking the horizontal direction as an example, if the network device sends the first SSB in the direction of 0 to 30 degrees, the network device can send one of the SIB1s in the direction of 0 to 15 degrees and send another SIB1 in the direction of 15 to 30 degrees.

In an embodiment of the present application, in a possible implementation, the terminal device does not have an angle estimation capability, so the terminal device can receive all SIB1s of the multiple SIB1s associated with the first SSB in the direction of the beam receiving the first SSB. In another possible implementation, the terminal device has a certain angle estimation capability, and the terminal device can use its own angle estimation capability to receive part of the SIB1s of the multiple SIB1s associated with the first SSB. For example, the first SSB is associated with 4 SIB1s, and the terminal device can receive the first SIB1 and the second SIB1; for another example, the terminal device has a strong angle estimation capability, and the terminal device can use its own angle estimation capability to receive only one SIB1, which is not limited in the embodiment of the present application.

It should be understood that the terminal device receives one SIB1 of multiple SIB1s associated with the first SSB, which needs to be associated with the first SSB from the carrier Determine which one of the time-frequency resources of multiple SIB1s is the time-frequency resource carrying the second SIB1. In some embodiments, it can be specified that the time-frequency resources of multiple SIB1s can be mapped in the order of SIB1 indexes or with frequency domain priority, so that the terminal device can determine the frequency domain resource carrying the second SIB1 according to the SIB1 index (for example, the index is 2). In some embodiments, the network device can indicate that the time-frequency resources of multiple SIB1s can be mapped in the order of SIB1 indexes, with frequency domain priority, and then the terminal device can determine the frequency domain resource carrying the second SIB1 according to the SIB1 index (for example, the index is 2).

In an embodiment of the present application, when the transmission power and modulation mode of each SIB1 in the multiple SIB1s associated with the first SSB remain unchanged, the narrower the beam width of each SIB1, the stronger the coverage capability of each SIB1, but the number of SIB1s required to cover the same angle range increases; when the total transmission power per unit time and the modulation mode corresponding to the multiple SIB1s associated with the first SSB remain unchanged, the larger the frequency division number of the multiple SIB1s associated with the first SSB, the shorter the distance covered by each SIB1, that is, the worse the coverage capability; the larger the time division number of the multiple SIB1s associated with the first SSB, the greater the access delay of the terminal device, the reduced chances of the network device and the terminal being shut down and sleeping, and the higher the energy consumption.

In the synchronization method provided in the embodiment of the present application, the first SSB includes first information for determining the receiving strategy of multiple SIB1s associated with the first SSB, and the terminal device can receive multiple SIB1s associated with the first SSB or one SIB1 among multiple SIB1s according to the first information. Among them, the network device can dynamically adjust the number of multiple SIB1s associated with the first SSB according to the user distribution to improve the coverage capability of SIB1; when the multiple SIB1s associated with the first SSB are sent in a frequency division manner, the scheme can reduce the scanning delay of the network device and the synchronization delay of the terminal device, increase the chances of the network device and the terminal device shutting down and sleeping, and thus reduce the energy consumption of the network device and the terminal device.

Further, in the case of receiving multiple SIB1s according to the first information, optionally, as shown in FIG9 , the synchronization method 500 provided by the present application further includes:

S530, the terminal device determines the first SIB1 from multiple SIB1s associated with the first SSB.

In an embodiment of the present application, a terminal device determines a first SIB1 from multiple SIB1s associated with a first SSB, wherein the first SIB1 is one of the multiple SIB1s associated with the first SSB.

In the first embodiment, the first SIB1 includes the second information, and the terminal device can determine the time-frequency resources of the first PRACH associated with the first SIB1 according to the second information. Figure 10 is a schematic diagram of the first SIB1 and the first PRACH provided in an embodiment of the present application, wherein the first SIB1 is one of the multiple SIB1s associated with the first SSB, and the first SIB1 corresponds one-to-one with the first PRACH, or, in other words, the second information included in the first SIB1 indicates the time-frequency resources of the first PRACH corresponding one-to-one. Exemplarily, the second information may be indication information indicating the time-frequency resources of the first PRACH.

In the second embodiment, the first SIB1 includes the second information, and the terminal device can determine the time-frequency resources of the multiple PRACHs associated with the first SIB1 according to the second information. Figure 11 is a schematic diagram of the first SIB1 and multiple PRACHs provided in an embodiment of the present application. As shown in Figure 11, the first SIB1 is one of the multiple SIB1s associated with the first SSB, the first SIB1 is associated with multiple PRACHs, and the first PRACH is one of the multiple PRACHs associated with the first SIB1.

In one possible implementation, the second information may include one or more of the following: the number of multiple PRACHs associated with the first SIB1, the beamwidth of each PRACH in the multiple PRACHs associated with the first SIB1 relative to the first SIB1, the frequency division number corresponding to the multiple PRACHs associated with the first SIB1, or the time division number corresponding to the multiple PRACHs associated with the first SIB1, or the second message may include other relevant information, which is not limited to this embodiment of the present application.

In an embodiment of the present application, the terminal device can determine the time-frequency resource pattern information of multiple PRACHs associated with the first SIB1 based on the second information. For the time-frequency resource pattern information of multiple PRACHs associated with the first SIB1, please refer to the examples in Figures 6 and 7. It is only necessary to replace the first SSB with the first SIB1, and replace multiple SIB1s with multiple PRACHs. It will not be repeated here. For the frequency fractions and time fractions corresponding to the multiple PRACHs associated with the first SIB1, please refer to the relevant description of the frequency fractions and time fractions of the multiple SIB1s associated with the first SSB described in the above step S510. It is only necessary to replace the first SSB with the first SIB1, and replace multiple SIB1s with multiple PRACHs. It will not be repeated here.

In an embodiment of the present application, for an example in which a terminal device determines the time-frequency resource pattern information of multiple PRACHs associated with a first SIB1 based on at least one item of the above-mentioned second information, reference can be made to the example in S510 in which a terminal device determines the time-frequency resource pattern information of multiple SIB1s associated with a first SSB based on at least one item of the first information. It is only necessary to replace the first information with the second information, the first SSB with the first SIB1, and the multiple SIB1s with multiple PRACHs, and no further details will be given here.

In another possible implementation, the second information may include time-frequency resource pattern information of multiple PRACHs associated with the first SIB1, so that the terminal device directly obtains the time-frequency resource pattern information of multiple PRACHs associated with the first SIB1, which simplifies the terminal device. It should be understood that the second information includes the number of multiple PRACHs associated with the first SIB1, or the beamwidth of each PRACH in the multiple PRACHs associated with the first SIB1 relative to the first SIB1, or the frequency division number corresponding to the multiple PRACHs associated with the first SIB1, or the time division number corresponding to the multiple PRACHs associated with the first SIB1, and the second information includes the time-frequency resource pattern information of the multiple PRACHs associated with the first SIB1. The solution can reduce the amount of information that the first SIB1 needs to carry and improve the reliability of the first SIB1.

In the third embodiment, the first SIB1 may not include the second information, predefine the number of multiple PRACHs associated with the first SIB1, and/or the beam width of each PRACH in the multiple PRACHs associated with the first SIB1 relative to the first SIB1, and/or the frequency division number corresponding to the multiple PRACHs associated with the first SIB1, and/or the time division number corresponding to the multiple PRACHs associated with the first SIB1, and/or the time-frequency resource pattern information of the multiple PRACHs associated with the first SIB1, and/or other relevant information used to determine the time-frequency resource pattern information of the multiple PRACHs associated with the first SIB1, and the embodiments of the present application do not limit this. This scheme can enable the terminal device to determine the time-frequency resource pattern information of the multiple PRACHs associated with the first SIB1 without adding additional information in the first SIB1.

In an embodiment of the present application, after determining the time-frequency resource pattern information of multiple PRACHs associated with the first SIB1 according to the above-mentioned embodiment two or embodiment three, the terminal device can further determine the time-frequency resources of the multiple PRACHs associated with the first SIB1 according to the time-frequency resource pattern information of the multiple PRACHs associated with the first SIB1, and then select the first PRACH therefrom according to the time-frequency resource pattern information of the multiple SIB1s associated with the first SIB1, and send a random access message from the first PRACH on the part of the time-frequency resources corresponding to the first PRACH. It should be understood that the time-frequency resources for carrying multiple PRACHs associated with the first SIB1 determined by the terminal device based on the time-frequency resource pattern information of multiple PRACHs associated with the first SIB1 are time-frequency resources corresponding to multiple PRACHs. If the terminal device wants to send a random access message from the first PRACH, it is necessary to determine the time-frequency resources of the first PRACH from the time-frequency resources of multiple PRACHs. For the relevant description of determining the time-frequency resources carrying the first PRACH from the time-frequency resources carrying multiple PRACHs, refer to S520 and/or S530 for the relevant description of determining the time-frequency resources carrying one SIB1 from the time-frequency resources carrying multiple SIB1s associated with the first SSB, which will not be repeated here. It should be noted that in the following embodiments of the present application, the method of determining a time-frequency resource from multiple time-frequency resources will not be repeated.

Optionally, the time-frequency resources of multiple PRACHs associated with the first SIB1 can be predefined, which can reduce the amount of information carried in the first SIB1 and improve the reliability of the first SIB1; or, optionally, the first SIB1 includes relevant information indicating the time-frequency resources of multiple PRACHs associated with the first SIB1, which can enable the network device to allocate the time-frequency resources of multiple PRACHs associated with the first SIB1 as needed, which is more flexible.

S540: The terminal device sends a random access request from the first random access channel. Correspondingly, the network device receives the random access request from the first random access channel.

In some embodiments, the first SIB1 is associated with multiple PRACHs, and the terminal device can select the first PRACH (i.e., described in S530 and S540) or part of the PRACHs from the multiple PRACHs associated with the first SIB1, and send a random access request from each PRACH in the first PRACH or part of the PRACHs. In some embodiments, the terminal device can select the first PRACH or part of the PRACHs from the multiple PRACHs associated with the first SIB1 based on the terminal device having a certain angle estimation capability, or based on other information. In some embodiments, the first SIB1 can also carry quantization angle information of the first SIB1, and the terminal device can use its own angle estimation capability combined with the quantization angle information of the first SIB1 to determine the first PRACH from the multiple PRACHs corresponding to the first SIB1 and send a random access message from the first PRACH. Specifically, reference can be made to the description of the quantization angle information of the second SIB1 in the following method 500, which will not be repeated here.

In the embodiment of the present application, the first SIB1 is associated with multiple PRACHs, and the collection of beam ranges corresponding to each of the multiple PRACHs associated with the first SIB1 is a subset of the beam range corresponding to the first SIB1. For the description of the collection of beam ranges corresponding to each of the multiple PRACHs associated with the first SIB1 being a subset of the beam range corresponding to the first SIB1, reference can be made to the description of the collection of beam ranges corresponding to each of the multiple SIB1s associated with the first SSB being a subset of the beam range corresponding to the first SSB in S520. It is only necessary to replace the first SSB with the first SIB1, and replace multiple SIB1s with multiple PRACHs, which will not be described in detail in the embodiment of the present application.

The synchronization method provided by the embodiment of the present application includes second information for determining the time-frequency resources of multiple PRACHs associated with the first SIB1 in the first SIB1, and the terminal device can send a random access message from the first PRACH according to the second information. Among them, the network device can dynamically adjust the number of PRACHs associated with the first SIB1 according to the distribution of users to improve the coverage capability of PRACH; when multiple PRACHs associated with the first SIB1 are sent in a frequency division manner, the terminal device can reduce the selection of The delay of the first PRACH among the multiple PRACHs associated with the first SIB1 further reduces the delay of random access of the terminal device, thereby reducing the energy consumption of the terminal device.

Further, in the case of receiving one SIB1 among multiple SIB1s according to the first information, optionally, as shown in FIG12 , the synchronization method 500 provided by the present application further includes:

Optionally, S550, the terminal device determines the second SIB1 based on the quantization angle information of the first SSB.

In the embodiment of the present application, the first SSB also includes quantized angle information of the first SSB, the terminal device has an angle estimation capability, and the terminal device determines the second SIB1 based on the quantized angle information of the first SSB and the beam width of each SIB1 of the multiple SIB1s associated with the first SSB included in the first information relative to the first SSB. For example, the first SSB is associated with 2 SIB1s, the beam widths of the two SIB1s are equal, and the sum of the beam widths of the two SIB1s is equal to the beam width of the first SSB. Taking the horizontal direction as an example, assuming that the quantized angle information of the first SSB indicates that the network device sends the direction of the beam corresponding to the first SSB from 0 to 30 degrees, the terminal device can determine that the network device will send one of the SIB1s (assuming it is the second SIB1) in the direction of 0 to 15 degrees and send another SIB1 in the direction of 15 to 30 degrees based on the quantized angle information of the first SSB and the equal beam widths of the two SIB1s. Then, the terminal device can determine that the second SIB1 to be received will be sent in the direction of 0 to 15 degrees.

In some embodiments, S550 may be performed before S520, that is, the terminal device first determines the second SIB1 based on the quantization angle information of the first SSB, and then receives one SIB1 among multiple SIB1s associated with the first SSB, that is, the second SIB1.

In an embodiment of the present application, the quantization angle information of the first SSB may be the beam number of the first SSB or the relative spatial position of the first SSB, or may be other information. The embodiment of the present application does not limit this. The terminal device may determine the beam angle information of the first SSB based on the quantization angle information of the first SSB and the first quantization rule corresponding to the quantization angle information of the first SSB. In one possible implementation, the first quantization rule corresponding to the quantization angle information of the first SSB is predefined, which can reduce the amount of information carried by the first SSB and improve the reliability of the first SSB. In another possible implementation, the first SSB also includes the first quantization rule corresponding to the quantization angle information of the first SSB. Different signals may use different quantization rules. For example, the beam of the SSB is relatively wide, and a coarser-grained quantization rule is used, while the beam of the SIB1 is relatively narrow, and a finer-grained quantization rule is more flexible. In another possible implementation, the terminal device receives the first quantization rule corresponding to the quantization angle information of the first SSB from another message.

To facilitate the reader's understanding, the quantization angle information and quantization rules are explained below with examples.

In the embodiment of the present application, the quantization rule indicates the beam angle, step size, and number of beams in the horizontal/vertical direction of the beam. For example, quantization rule 0: horizontal -45:30:45, vertical 15:30:75; quantization rule 1: horizontal -45:15:45, vertical 15:30:75. Take quantization rule 0 as an example. The horizontal direction represents the AOD of the beam, and the vertical direction represents the ZOD of the beam. In the horizontal -45:30:45, -45 and +45 represent that the angle range is from -45 degrees to +45 degrees, and 30 represents the step size. That is, the quantization angle of the beam corresponding to the angle range of -45 degrees to -15 degrees is 0, the quantization angle of the beam corresponding to the angle range of -15 degrees to 15 degrees is 1, and the quantization angle of the beam corresponding to the angle range of 15 degrees to 45 degrees is 2. In the vertical 15:30:75, 15 and 75 represent that the angle range is from 15 degrees to 75 degrees, and 30 represents the step size. That is, the quantization angle of the beam corresponding to the angle range of 15 degrees to 45 degrees is 0, and the quantization angle of the beam corresponding to the angle range of 45 degrees to 75 degrees is 1. The quantization angle is 1; assuming that the AOD of the first SSB is -45 degrees and the ZOD is 15 degrees, its relative spatial position is (x, y) = (2, 1), where x represents the quantized AOD and y represents the quantized ZOD; if the beams are sorted according to their relative spatial positions, assuming that the serial numbers are arranged in ascending order and the horizontal direction is prioritized, then the serial number i = Nx*y+x, where Nx is the number of beams in the horizontal direction, then the beam number of the first SSB in the above example is 6, where the beam number starts from 0, and the number of beams is the number of beams within the angle range corresponding to the step size, for example, the step size is 30, and the number of beams within the angle range of -45 degrees to +45 degrees is 90/30 = 3.

In some embodiments, the terminal device may determine the second SIB1 only based on its own angle estimation capability, which is not limited in this embodiment of the present application.

S560, the terminal device determines the time-frequency resource pattern information of multiple PRACHs associated with the second SIB1 according to the third information.

In an embodiment of the present application, the second SIB1 includes third information. For the third information, reference may be made to the relevant description of the second information in S530, and for the relevant description of the terminal device determining the time-frequency resource pattern information of multiple PRACHs associated with the second SIB1 based on the third information, reference may be made to the relevant description in S530. It is only necessary to replace the second information with the third information, and replace the first SIB1 with the second SIB1. The embodiments of the present application will not be repeated here.

S570, the terminal device determines the time-frequency resources of the multiple PRACHs associated with the second SIB1 according to the time-frequency resource pattern information of the multiple PRACHs associated with the second SIB1.

In the embodiment of the present application, the terminal device determines the time-frequency resource pattern information of multiple PRACHs associated with the second SIB1 For the relevant description of the time-frequency resources of multiple PRACHs associated with the second SIB1, refer to the relevant description in S530. It is only necessary to replace the first SIB1 with the second SIB1. The embodiments of the present application will not be described in detail here.

Optionally, S580, the terminal device determines the second PRACH according to the quantization angle information of the second SIB1.

In an embodiment of the present application, for the relevant description about the terminal device determining the second PRACH according to the quantization angle information of the second SIB1, reference can be made to the relevant description in S550 about the terminal device determining the second SIB1 according to the quantization angle information of the first SSB. It is only necessary to replace the first SSB with the second SIB1, and replace the second SIB1 with the second PRACH. The embodiment of the present application will not be repeated here.

In some implementations, S580 may be performed before step S560 and step S570, which is not limited in the embodiments of the present application.

In one possible implementation, the second quantization rule corresponding to the quantization angle information of the second SIB1 is predefined; in another possible implementation, the second SIB1 also includes the second quantization rule corresponding to the quantization angle information of the second SIB1, and different signals can use different quantization rules. For example, the beam of SIB1 is relatively wide, and a coarser-grained quantization rule is used, while the beam of PRACH is relatively narrow, and a finer-grained quantization rule is more flexible. In another possible implementation, the terminal device receives the second quantization rule corresponding to the quantization angle information of the second SIB1 from another message. For the relevant description of the quantization angle information of the second SIB1 and the second quantization rule corresponding to the quantization angle information of the second SIB1, refer to the relevant description of the quantization angle information of the first SSB and the first quantization rule corresponding to the quantization angle information of the first SSB in S550, which will not be repeated here.

Alternatively, the terminal device may determine the second PRACH based on its own angle estimation capability, which is not limited in this embodiment of the present application.

S590, the terminal device sends a random access request from the second PRACH.

In an embodiment of the present application, the terminal device determines the time-frequency resources carrying the second PRACH from the time-frequency resources carrying multiple PRACHs associated with the second SIB1. Further, the terminal device sends a random access request from the second PRACH.

In the synchronization method provided by the embodiment of the present application, the network device includes in the second SIB1 the third information for determining the time-frequency resources of the multiple PRACHs associated with the second SIB1, so that the terminal device can send a random access message from the second PRACH according to the third information. Among them, the network device can dynamically adjust the number of PRACHs associated with the second SIB1 according to the distribution of users to improve the coverage capability of the PRACH; when the multiple PRACHs associated with the second SIB1 are sent in a frequency division manner, the delay of the terminal device selecting the second PRACH among the multiple PRACHs associated with the second SIB1 can be reduced, further reducing the delay of random access of the terminal device, thereby reducing the energy consumption of the terminal device.

FIG13 is a schematic diagram of another example of a synchronization method provided in an embodiment of the present application. The method is illustrated by taking the interaction between a terminal device and a network device as an example. Of course, the subject that executes the terminal device action in the method may also be a device/module in the terminal device, such as a chip, a processor, a processing unit, etc. in the terminal device; the subject that executes the network device action in the method may also be a device/module in the network device, such as a chip, a processor, a processing unit, etc. in the network device, which is not specifically limited in the embodiment of the present application. The processing performed by a single execution subject (for example, a network device or a terminal device) in the embodiment of the present application may also be divided into multiple execution subjects, which may be logically and/or physically separated. For example, the processing performed by the network device may be divided into at least one of a CU, a DU, and a RU; for another example, the processing performed by the network device may be divided into at least one of an O-CU (O-CU-CP in an O-CU or O-CU-UP in an O-CU), an O-DU, and an O-RU in an ORAN system. Exemplarily, as shown in FIG13, a synchronization method 1300 provided in an embodiment of the present application includes:

S1310: The network device sends a first SSB to the terminal device. Correspondingly, the terminal device receives the first SSB from the network device.

In the embodiment of the present application, the first SSB is associated with the third SIB1, or, in other words, the first SSB corresponds to the third SIB1 one by one. Exemplarily, the terminal device can receive the third SIB1 in the direction corresponding to the reception of the first SSB according to the scheme introduced in the related art.

S1320: The network device sends a third SIB1 to the terminal device. Correspondingly, the terminal device receives the third SIB1 from the network device.

In an embodiment of the present application, the third SIB1 includes fourth information, and the fourth message is used to determine the time-frequency resources of multiple PRACHs associated with the third SIB1. As shown in Figure 14, a schematic diagram of the correspondence between the third SIB1 and multiple PRACHs provided in an embodiment of the present application is provided, wherein the third SIB1 corresponds to the first SSB one-to-one, and the third SIB1 corresponds to multiple PRACHs.

In an embodiment of the present application, for the relevant description of the fourth message included in the third SIB1, and the fourth message being used to determine the time-frequency resources of multiple PRACHs associated with the third SIB1, reference may be made to the relevant description in method 500. It is only necessary to replace the first SIB1 or the second SIB1 with the third SIB1, and replace the third message with the fourth message. The embodiment of the present application will not be repeated here.

In the synchronization method provided in the embodiment of the present application, the network device includes fourth information for determining the time-frequency resources of multiple PRACHs associated with the third SIB1 in the third SIB1, so that the terminal device determines the time-frequency resources of multiple PRACHs associated with the third SIB1.

Further, optionally, the method 1300 also includes:

S1330, the terminal device determines the time-frequency resource pattern information of multiple PRACHs associated with the third SIB1 according to the fourth information.

In the embodiment of the present application, the terminal device determines the time-frequency resource pattern information of multiple PRACHs associated with the third SIB1 according to the fourth information, and can refer to the relevant description in method 500, which is not elaborated in the embodiment of the present application.

S1340, the terminal device determines the time-frequency resources of the multiple PRACHs associated with the third SIB1 according to the time-frequency resource pattern information of the multiple PRACHs associated with the third SIB1.

In the embodiment of the present application, the terminal device determines the time-frequency resources of multiple PRACHs associated with the third SIB1 according to the time-frequency resource pattern information of multiple PRACHs associated with the third SIB1, and can refer to the relevant description in method 500, which will not be repeated in the embodiment of the present application.

Optionally, S1350, the terminal device determines a third PRACH according to the quantization angle information of the third SIB1.

It should be understood that step S1350 may be performed before step S1330 and S1340, and this embodiment of the present application does not limit this.

In an embodiment of the present application, for the relevant description on the terminal device determining the third PRACH based on the quantization angle information of the third SIB1, reference can be made to method 500 in which the terminal device determines the second PRACH based on the quantization angle information of the second SIB1. It is only necessary to replace the second SIB1 with the third SIB1, and replace the second PRACH with the third PRACH. The embodiments of the present application will not be repeated here.

S1360: The terminal device sends a random access request from the third PRACH. Correspondingly, the network device receives the random access request from the third PRACH.

In the embodiment of the present application, the relevant description about the terminal device sending a random access request from the third PRACH can refer to the relevant description of the terminal device sending a random access request from the second PRACH in method 500. It is only necessary to replace the second PRACH with the third PRACH. The embodiment of the present application is not repeated here.

In an embodiment of the present application, the terminal device can determine the time-frequency resource pattern information of multiple PRACHs associated with the third SIB1 based on the fourth information. Further, the terminal device can determine the time-frequency resources of multiple PRACHs associated with the third SIB1, thereby sending a random access message from the third PRACH; when the multiple PRACHs associated with the third SIB1 are sent in a frequency division manner, the delay of the terminal device selecting the second PRACH among the multiple PRACHs associated with the second SIB1 can be reduced, further reducing the delay of random access of the terminal device, and thereby reducing the energy consumption of the terminal device.

The above mainly introduces the scheme provided by the embodiment of the present application from the perspective of the interaction between the terminal device and the network device. Accordingly, the embodiment of the present application also provides a communication device, which is used to implement the above various methods. The communication device can be a terminal device in the above method embodiment, or a device including the above terminal device, or a component that can be used for the terminal device; or, the communication device can be a first network device in the above method embodiment, or a device including the above network device, or a component that can be used for the network device. It can be understood that the communication device includes a hardware structure and/or software module corresponding to each function in order to implement the above functions. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

The embodiment of the present application can divide the functional modules of the communication device according to the above method embodiment. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be understood that the division of modules in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

For example, FIG15 is a schematic diagram of a communication device provided in an embodiment of the present application, and the communication device is taken as a terminal device in the above method embodiment (which may be a chip of a terminal device, or a module of a terminal device, or an internal device of a terminal device) as an example, and the terminal device includes a transceiver module 1510 and a processing module 1520. The transceiver module 1510, which may also be referred to as a transceiver unit for implementing a transceiver function, may be, for example, a transceiver circuit, a transceiver, a transceiver or a communication interface.

In the embodiment of the present application, the transceiver module 1510 is used to receive a first synchronization/broadcast signal block SSB, where the first SSB includes first information, and the first information is used to determine a receiving strategy of multiple system message blocks SIB1 associated with the first SSB;

In the embodiment of the present application, the processing module 1520 is configured to receive a plurality of SIB1s or one SIB1 among the plurality of SIB1s according to the first information.

In the embodiment of the present application, the first information includes one or more of the following: the number of multiple SIB1s, each SIB1 in the multiple SIB1s Relative to the beamwidth of the first SSB, the frequency division number corresponding to multiple SIB1s, or the time division number corresponding to multiple SIB1s.

In one possible implementation, the processing module 1520 is used to receive multiple SIB1s according to the first information, including: the processing module 1520 is used to determine the time-frequency resource pattern information corresponding to the multiple SIB1s according to the first information; the processing module 1520 is used to receive multiple SIB1s according to the time-frequency resource pattern information of the multiple SIB1s.

In the embodiment of the present application, multiple SIB1s are carried on predefined time-frequency resources.

In an embodiment of the present application, when the transceiver module 1510 is used to receive multiple SIB1s according to the first information, the processing module 1520 is used to determine the first SIB1 from the multiple SIB1s, the first SIB1 includes second information, and the second information is used to determine the time-frequency resources of one or more random access channels PRACH associated with the first SIB1; the first SIB1 is one SIB1 among the multiple SIB1s.

In the embodiment of the present application, the transceiver module 1510 is further configured to send a random access request from a first PRACH, wherein the first PRACH is a PRACH associated with the first SIB1 or one of multiple PRACHs associated with the first SIB1.

In an embodiment of the present application, the second information includes one or more of the following: the number of multiple PRACHs associated with the first SIB1, the beamwidth of each PRACH in the multiple PRACHs associated with the first SIB1 relative to the first SIB1, the frequency division number corresponding to the multiple PRACHs associated with the first SIB1, or the time division number corresponding to the multiple PRACHs associated with the first SIB1.

In another possible implementation, the first SSB also includes quantized angle information of the first SSB.

In an embodiment of the present application, the transceiver module 1510 is used to receive one of multiple SIB1s according to the first information, including: a processing module 1520 is used to determine the time-frequency resource pattern information corresponding to the multiple SIB1s according to the first information; the processing module 1520 is used to determine the second SIB1 according to the quantization angle information of the first SSB, and the second SIB1 is one of the multiple SIB1s; the processing module 1520 is used to receive the second SIB1 according to the time-frequency resource pattern information corresponding to the multiple SIB1s.

In a possible implementation, a first quantization rule corresponding to the quantization angle information of the first SSB is predefined.

In a possible implementation, a first quantization rule corresponding to the quantization angle information of the first SSB is predefined.

In this embodiment of the present application, the second SIB1 is carried on predefined time-frequency resources.

In the embodiment of the present application, the second SIB1 includes quantization angle information of the second SIB1 and third information, and the third information is used to determine the time-frequency resources of multiple PRACHs associated with the second SIB1.

In an embodiment of the present application, the processing module 1520 is also used to determine the time-frequency resource pattern information of multiple PRACHs associated with the second SIB1 based on the third information; the processing module 1520 is used to determine the time-frequency resources of multiple PRACHs associated with the second SIB1 based on the time-frequency resource pattern information of multiple PRACHs associated with the second SIB1; the processing module 1520 is used to determine the second PRACH based on the quantization angle information of the second SIB1, and the second PRACH is one of the multiple PRACHs associated with the second SIB1; the transceiver module 1510 is used to send a random access request from the second PRACH.

In an embodiment of the present application, the third information includes one or more of the following information: the number of multiple PRACHs associated with the second SIB1, the beamwidth of each PRACH in the multiple PRACHs associated with the second SIB1 relative to the second SIB1, the frequency division number corresponding to the multiple PRACHs associated with the second SIB1, or the time division number corresponding to the multiple PRACHs associated with the second SIB1.

In a possible implementation manner, a second quantization rule corresponding to the quantization angle information of the second SIB1 is predefined.

In another possible implementation manner, the second SIB1 further includes a second quantization rule corresponding to the quantization angle information of the second SIB1.

In an embodiment of the present application, the collection of beam ranges corresponding to each SIB1 in multiple SIB1s associated with the first SSB is a subset of the beam range corresponding to the first SSB.

In the embodiment of the present application, the collection of beam ranges corresponding to each of the multiple PRACHs associated with each SIB1 in the multiple SIB1s is a subset of the beam range corresponding to each SIB1.

Among them, all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module, which will not be repeated here. Optionally, the communication device 1500 can also include a storage module 1530, which can be used to store instructions and/or data, and the processing module 1520 can read the instructions and/or data in the storage module 1530.

In the embodiment of the present application, the terminal device is presented in the form of dividing each functional module in an integrated manner. The "module" here may refer to a specific ASIC, circuit, processor and memory that executes one or more software or firmware programs, integrated logic circuit, and/or other devices that can provide the above functions. In a simple embodiment, those skilled in the art can imagine that the terminal device can take the form of a communication device 400 shown in Figure 4.

For example, the processor 401 in the communication device 400 shown in FIG. 4 may call the computer-executable instructions stored in the memory 403 so that the communication device 400 executes the communication method in the above method embodiment.

Specifically, the functions/implementation processes of the transceiver module 1510 and the processing module 1520 in FIG. 15 can be implemented by the communication module 1510 and the processing module 1520 in FIG. The processor 401 in the communication device 400 calls the computer execution instructions stored in the memory 403 to implement. Alternatively, the function/implementation process of the processing module 1520 in FIG. 15 can be implemented by the processor 401 in the communication device 400 shown in FIG. 4 calling the computer execution instructions stored in the memory 403, and the function/implementation process of the transceiver module 1510 in FIG. 15 can be implemented by the communication interface 404 in the communication device 400 shown in FIG. 4.

Since the terminal device provided in the embodiment of the present application (which may be a chip of the terminal device, or a module of the terminal device, or an internal device of the terminal device) can execute the above-mentioned synchronization method, the technical effects that can be obtained can be referred to the above-mentioned method embodiment and will not be repeated here.

Alternatively, taking the communication device as a network device in the above method embodiment (which may be a chip of the network device, or a module of the network device, or an internal device of the network device) as an example, the network device includes a transceiver module 1510 and a processing module 1520. The transceiver module 1510, which may also be referred to as a transceiver unit, is used to implement a transceiver function, and may be, for example, a transceiver circuit, a transceiver, a transceiver or a communication interface.

In an embodiment of the present application, the transceiver module 1510 is used to send a first synchronization/broadcast signal block SSB, the first SSB includes first information, the first information is used to determine a receiving strategy of multiple system message blocks SIB1 associated with the first SSB, and the receiving strategy is used to receive multiple SIB1s or one SIB1 among multiple SIB1s; the transceiver module 1510 is also used to send multiple SIB1s associated with the first SSB.

In an embodiment of the present application, the first information includes one or more of the following: the number of multiple SIB1s, the beamwidth of each SIB1 in the multiple SIB1s relative to the first SSB, the frequency fractions corresponding to the multiple SIB1s, or the time fractions corresponding to the multiple SIB1s.

In one possible implementation, the first information is used to determine the time-frequency resource pattern information corresponding to multiple SIB1s; the transceiver module 1510 is used to send multiple SIB1s, including: the processing module 1520 is used for the transceiver module 1510 to send multiple SIB1s according to the time-frequency resource pattern information corresponding to multiple SIB1s.

In the embodiment of the present application, multiple SIB1s are carried on predefined resources.

In the embodiment of the present application, the multiple SIB1s include a first SIB1, the first SIB1 includes second information, and the second information is used to determine the time-frequency resources of one or more random access channels PRACH associated with the first SIB1.

In the embodiment of the present application, the transceiver module 1510 is used to receive a random access request from a first PRACH, wherein the first PRACH is a PRACH associated with the first SIB1 or one of multiple PRACHs associated with the first SIB1.

In an embodiment of the present application, the first SIB1 includes second information, and the second information includes one or more of the following: the number of multiple PRACHs associated with the first SIB1, the beamwidth of each PRACH in the multiple PRACHs associated with the first SIB1 relative to the first SIB1, the frequency division number corresponding to the multiple PRACHs associated with the first SIB1, or the time division number corresponding to the multiple PRACHs associated with the first SIB1.

In another possible implementation, the first SSB also includes quantized angle information of the first SSB.

In an embodiment of the present application, the transceiver module 1510 is used to send multiple SIB1s, including: the transceiver module 1510 is used to send multiple SIB1s according to the time-frequency resource pattern information corresponding to the multiple SIB1s; wherein the multiple SIB1s include a second SIB1, the quantization angle information of the first SSB is used to determine the second SIB1, and the first information is used to determine the time-frequency resource pattern information corresponding to the multiple SIB1s.

In a possible implementation, a first quantization rule corresponding to the quantization angle information of the first SSB is predefined.

In another possible implementation, the first SSB also includes a first quantization rule corresponding to the quantization angle information of the first SSB.

In this embodiment of the present application, the second SIB1 is carried on predefined resources.

In the embodiment of the present application, the second SIB1 includes quantization angle information of the second SIB1 and third information, and the third information is used to determine the time-frequency resources of multiple PRACHs associated with the second SIB1.

In an embodiment of the present application, the transceiver module 1510 is also used to receive a random access request from a second PRACH; wherein, the time-frequency resources of multiple PRACHs associated with the second SIB1 are determined based on the time-frequency resource pattern information of multiple PRACHs associated with the second SIB1, the time-frequency resource pattern information of multiple PRACHs associated with the second SIB1 is determined based on third information, and the second PRACH is determined from the multiple PRACHs associated with the second SIB1 based on the quantization angle information of the second SIB1.

In an embodiment of the present application, the third information includes one or more of the following information: the number of multiple PRACHs associated with the second SIB1, the beamwidth of each PRACH in the multiple PRACHs associated with the second SIB1 relative to the second SIB1, the frequency division number corresponding to the multiple PRACHs associated with the second SIB1, or the time division number corresponding to the multiple PRACHs associated with the second SIB1.

In a possible implementation manner, a second quantization rule corresponding to the quantization angle information of the second SIB1 is predefined.

In another possible implementation manner, the second SIB1 includes a second quantization rule corresponding to the quantization angle information of the second SIB1.

In the embodiment of the present application, the set of beam ranges corresponding to each SIB1 in the multiple SIB1s associated with the first SSB is the first SSB corresponds to a subset of the beam range.

In the embodiment of the present application, the collection of beam ranges corresponding to each of the multiple PRACHs associated with each SIB1 in the multiple SIB1s is a subset of the beam range corresponding to each SIB1.

Among them, all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module, which will not be repeated here. Optionally, the communication device 1500 can also include a storage module 1530, which can be used to store instructions and/or data, and the processing module 1520 can read the instructions and/or data in the storage module 1530.

In the embodiment of the present application, the network device is presented in the form of dividing each functional module in an integrated manner. The "module" here can refer to a specific ASIC, circuit, processor and memory that executes one or more software or firmware programs, integrated logic circuit, and/or other devices that can provide the above functions. In a simple embodiment, those skilled in the art can imagine that the terminal device can take the form of a communication device 400 shown in Figure 4.

For example, the processor 401 in the communication device 400 shown in FIG. 4 may call the computer-executable instructions stored in the memory 403 so that the communication device 400 executes the communication method in the above method embodiment.

Specifically, the functions/implementation process of the transceiver module 1510 and the processing module 1520 in FIG15 can be implemented by the processor 401 in the communication device 400 shown in FIG4 calling the computer execution instructions stored in the memory 403. Alternatively, the functions/implementation process of the processing module 1520 in FIG15 can be implemented by the processor 401 in the communication device 400 shown in FIG4 calling the computer execution instructions stored in the memory 403, and the functions/implementation process of the transceiver module 1510 in FIG15 can be implemented by the communication interface 404 in the communication device 400 shown in FIG4.

Since the network device provided in the embodiment of the present application (which may be a chip of the network device, or a module of the network device, or an internal device of the network device) can execute the above-mentioned synchronization method, the technical effects that can be obtained can be referred to the above-mentioned method embodiment and will not be repeated here.

It should be understood that one or more of the above modules or units can be implemented by software, hardware or a combination of the two. When any of the above modules or units is implemented in software, the software exists in the form of computer program instructions and is stored in a memory, and the processor can be used to execute the program instructions and implement the above method flow. The processor can be built into an SoC (system on chip) or an ASIC, or it can be an independent semiconductor chip. In addition to the core used to execute software instructions for calculation or processing in the processor, it can further include necessary hardware accelerators, such as field programmable gate arrays (FPGA), PLDs (programmable logic devices), or logic circuits that implement dedicated logic operations.

When the above modules or units are implemented in hardware, the hardware can be any one or any combination of a CPU, a microprocessor, a digital signal processing (DSP) chip, a microcontroller unit (MCU), an artificial intelligence processor, an ASIC, a SoC, an FPGA, a PLD, a dedicated digital circuit, a hardware accelerator or a non-integrated discrete device, which can run the necessary software or not rely on the software to execute the above method flow.

Optionally, an embodiment of the present application further provides a communication device (for example, the communication device may be a chip or a chip system), which includes a processor for implementing the method in any of the above method embodiments. In one possible design, the communication device also includes a memory. The memory is used to store necessary program instructions and/or data, and the processor can call the program code stored in the memory so that the communication device executes the method in any of the above method embodiments. Of course, the memory may not be in the communication device. When the communication device is a chip system, it may be composed of chips, or it may include chips and other discrete devices, which is not specifically limited in the embodiments of the present application.

Optionally, an embodiment of the present application further provides a computer-readable storage medium, which stores a computer program or instruction, and when the computer-readable storage medium is run on a communication device, the communication device can execute the method described in any of the above method embodiments or any of its implementation methods.

Optionally, an embodiment of the present application further provides a communication system, which includes the network device described in the above method embodiment and the terminal device described in the above method embodiment.

Optionally, an embodiment of the present application further provides a communication system, which includes the communication device described in the above method embodiment.

In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware, or any combination thereof. When implemented by a software program, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. Computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. Computer-readable storage media can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes one or more available media integrated. Available media can be magnetic media (e.g., floppy disks, hard disks, tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid state disks (SSDs)), etc.

Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other changes to the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims (44)

A synchronization method, characterized by comprising: Receiving a first synchronization/broadcast signal block SSB, the first SSB comprising first information, the first information being used to determine a reception strategy of a plurality of system message blocks SIB1 associated with the first SSB; The multiple SIB1s or one SIB1 among the multiple SIB1s is received according to the first information. The method according to claim 1 is characterized in that the first information includes one or more of the following: the number of the multiple SIB1s, the beamwidth of each SIB1 in the multiple SIB1s relative to the first SSB, the frequency fractions corresponding to the multiple SIB1s, or the time fractions corresponding to the multiple SIB1s. The method according to claim 2, characterized in that the receiving the plurality of SIB1s according to the first information comprises: Determine the time-frequency resource pattern information corresponding to the multiple SIB1s according to the first information; The multiple SIB1s are received according to the time-frequency resource pattern information of the multiple SIB1s. The method according to any one of claims 1 to 3 is characterized in that one or more of the multiple SIB1s are carried on predefined time-frequency resources. The method according to any one of claims 1 to 4 is characterized in that, in the case of receiving the multiple SIB1s according to the first information, the method further includes: determining a first SIB1 from the multiple SIB1s, the first SIB1 including second information, the second information being used to determine the time-frequency resources of one or more random access channels PRACH associated with the first SIB1; the first SIB1 is one SIB1 among the multiple SIB1s. The method according to claim 5, characterized in that the method further comprises: A random access request is sent from a first PRACH, where the first PRACH is a PRACH associated with the first SIB1 or one of multiple PRACHs associated with the first SIB1. The method according to claim 5 or 6, characterized in that the second information includes one or more of the following: The number of multiple PRACHs associated with the first SIB1, the beamwidth of each PRACH in the multiple PRACHs associated with the first SIB1 relative to the first SIB1, the frequency division number corresponding to the multiple PRACHs associated with the first SIB1, or the time division number corresponding to the multiple PRACHs associated with the first SIB1. The method according to claim 2 is characterized in that the first SSB also includes quantized angle information of the first SSB. The method according to claim 8, characterized in that the receiving one of the plurality of SIB1s according to the first information comprises: Determine the time-frequency resource pattern information corresponding to the multiple SIB1s according to the first information; Determine a second SIB1 according to the quantization angle information of the first SSB, where the second SIB1 is one of the multiple SIB1s; The second SIB1 is received according to the time-frequency resource pattern information corresponding to the multiple SIB1s. The method according to claim 8 or 9 is characterized in that the first quantization rule corresponding to the quantization angle information of the first SSB is predefined. The method according to claim 8 or 9 is characterized in that the first SSB also includes a first quantization rule corresponding to the quantization angle information of the first SSB. The method according to any one of claims 9 to 11 is characterized in that the second SIB1 is carried on a predefined time-frequency resource. The method according to any one of claims 9 to 12 is characterized in that the second SIB1 includes quantization angle information of the second SIB1 and third information, and the third information is used to determine the time-frequency resources of multiple PRACHs associated with the second SIB1. The method according to claim 13, characterized in that the method further comprises: Determine, according to the third information, time-frequency resource pattern information of multiple PRACHs associated with the second SIB1; Determine the time-frequency resources of the multiple PRACHs associated with the second SIB1 according to the time-frequency resource pattern information of the multiple PRACHs associated with the second SIB1; Determine a second PRACH according to the quantization angle information of the second SIB1, where the second PRACH is one of multiple PRACHs associated with the second SIB1; A random access request is sent on the second PRACH. The method according to claim 13 or 14 is characterized in that the third information includes one or more of the following information: the number of multiple PRACHs associated with the second SIB1, the beamwidth of each PRACH in the multiple PRACHs associated with the second SIB1 relative to the second SIB1, the frequency fraction corresponding to the multiple PRACHs associated with the second SIB1, or the time fraction corresponding to the multiple PRACHs associated with the second SIB1. The method according to any one of claims 13 to 15 is characterized in that the second quantization rule corresponding to the quantization angle information of the second SIB1 is predefined. The method according to any one of claims 13 to 15 is characterized in that the second SIB1 also includes a second quantization rule corresponding to the quantization angle information of the second SIB1. The method according to any one of claims 1 to 17 is characterized in that the set of beam ranges corresponding to each SIB1 in the multiple SIB1s associated with the first SSB is a subset of the beam range corresponding to the first SSB. The method according to any one of claims 1 to 18 is characterized in that the collection of beam ranges corresponding to each of the multiple PRACHs associated with each SIB1 in the multiple SIB1s is a subset of the beam range corresponding to each SIB1. A synchronization method, characterized by comprising: Sending a first synchronization/broadcast signal block SSB, where the first SSB includes first information, where the first information is used to determine a receiving strategy of a plurality of system message blocks SIB1 associated with the first SSB, where the receiving strategy is used to receive the plurality of SIB1s or one SIB1 among the plurality of SIB1s; Send the multiple SIB1s associated with the first SSB. The method according to claim 20 is characterized in that the first information includes one or more of the following: the number of the multiple SIB1s, the beamwidth of each SIB1 in the multiple SIB1s relative to the first SSB, the frequency fractions corresponding to the multiple SIB1s, or the time fractions corresponding to the multiple SIB1s. The method according to claim 21, characterized in that the first information is used to determine the time-frequency resource pattern information corresponding to the multiple SIB1s; The sending the multiple SIB1s includes: sending the multiple SIB1s according to time-frequency resource pattern information corresponding to the multiple SIB1s. The method according to any one of claims 20 to 22 is characterized in that one or more of the multiple SIB1s are carried on predefined resources. The method according to any one of claims 20 to 23 is characterized in that the multiple SIB1s include a first SIB1, the first SIB1 includes second information, and the second information is used to determine the time-frequency resources of one or more random access channels PRACH associated with the first SIB1. The method according to claim 24 is characterized in that it also includes: receiving a random access request from a first PRACH, wherein the first PRACH is a PRACH associated with the first SIB1 or one of multiple PRACHs associated with the first SIB1. The method according to claim 24 or 25 is characterized in that the first SIB1 includes second information, and the second information includes one or more of the following: the number of multiple PRACHs associated with the first SIB1, the beamwidth of each PRACH in the multiple PRACHs associated with the first SIB1 relative to the first SIB1, the frequency division number corresponding to the multiple PRACHs associated with the first SIB1, or the time division number corresponding to the multiple PRACHs associated with the first SIB1. The method according to claim 21 is characterized in that the first SSB also includes quantized angle information of the first SSB. The method according to claim 27, characterized in that the sending of the multiple SIB1s comprises: Send the multiple SIB1s according to the time-frequency resource pattern information corresponding to the multiple SIB1s; Among them, the multiple SIB1s include a second SIB1, the quantization angle information of the first SSB is used to determine the second SIB1, and the first information is used to determine the time-frequency resource pattern information corresponding to the multiple SIB1s. The method according to claim 27 or 28 is characterized in that the first quantization rule corresponding to the quantization angle information of the first SSB is predefined. The method according to claim 27 or 28, characterized in that the first SSB also includes the first SSB The first quantization rule corresponding to the quantization angle information. The method according to any one of claims 27 to 30 is characterized in that the second SIB1 is carried on predefined resources. The method according to any one of claims 27 to 31 is characterized in that the second SIB1 includes quantization angle information of the second SIB1 and third information, and the third information is used to determine the time-frequency resources of multiple PRACHs associated with the second SIB1. The method according to claim 32, characterized in that the method further comprises: A random access request is received from a second PRACH; wherein the time-frequency resources of the multiple PRACHs associated with the second SIB1 are determined according to the time-frequency resource pattern information of the multiple PRACHs associated with the second SIB1, the time-frequency resource pattern information of the multiple PRACHs associated with the second SIB1 is determined according to the third information, and the second PRACH is determined from the multiple PRACHs associated with the second SIB1 according to the quantization angle information of the second SIB1. The method according to claim 32 or 33 is characterized in that the third information includes one or more of the following information: the number of multiple PRACHs associated with the second SIB1, the beamwidth of each PRACH in the multiple PRACHs associated with the second SIB1 relative to the second SIB1, the frequency fraction corresponding to the multiple PRACHs associated with the second SIB1, or the time fraction corresponding to the multiple PRACHs associated with the second SIB1. The method according to any one of claims 32 to 34 is characterized in that the second quantization rule corresponding to the quantization angle information of the second SIB1 is predefined by the protocol. The method according to any one of claims 32 to 34 is characterized in that the second SIB1 includes a second quantization rule corresponding to the quantization angle information of the second SIB1. The method according to any one of claims 20 to 36 is characterized in that the set of beam ranges corresponding to each SIB1 in the multiple SIB1s associated with the first SSB is a subset of the beam range corresponding to the first SSB. The method according to any one of claims 20 to 37 is characterized in that the collection of beam ranges corresponding to each of the multiple PRACHs associated with each SIB1 in the multiple SIB1s is a subset of the beam range corresponding to each SIB1. A communication device, comprising: A transceiver module, configured to receive a first synchronization/broadcast signal block SSB, wherein the first SSB includes first information, and the first information is used to determine a receiving strategy of a plurality of system message blocks SIB1 associated with the first SSB; The processing module is configured to receive the multiple SIB1s or one SIB1 among the multiple SIB1s according to the first information. A communication device, comprising: A transceiver module, configured to send a first synchronization/broadcast signal block SSB, wherein the first SSB includes first information, wherein the first information is used to determine a receiving strategy of a plurality of system message blocks SIB1 associated with the first SSB, wherein the receiving strategy is used to receive the plurality of SIB1s or one SIB1 among the plurality of SIB1s; The transceiver module is also used to send the multiple SIB1s associated with the first SSB. A communication device, characterized in that the communication device comprises a module for executing the method according to any one of claims 1 to 19, or comprises a module for executing the method according to any one of claims 20 to 38. A communication device, characterized in that the communication device comprises a processor; the processor is configured to execute the method according to any one of claims 1 to 19, or to cause the communication device to execute the method according to any one of claims 20 to 38. A computer-readable storage medium, characterized in that the computer-readable storage medium includes instructions, and when the instructions are executed, the method according to any one of claims 1 to 19 is implemented, or the method according to any one of claims 20 to 38 is implemented. A computer program product, characterized in that the computer program product comprises instructions, and when the instructions are executed, the method according to any one of claims 1 to 19 is implemented, or the method according to any one of claims 20 to 38 is implemented.