Communication method and communication apparatus

Abstract

Provided in the present application are a communication method and a communication apparatus. The method may comprise: a network device sending N synchronization signals, N being an integer greater than 1; and the network device sending M PDCCHs, and a terminal device receiving the M PDCCHs jointly, wherein the M PDCCHs are used for scheduling system information corresponding to the N synchronization signals or N beams, the system information corresponding to the N synchronization signals or the N beams is system information sent in the same time window, and the M PDCCHs bear the same information, M being an integer greater than 1 or equal to 1. By means of the present application, since M PDCCHs bear the same information, a terminal device can receive the M PDCCHs jointly, such that the transmission performance can be improved.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on September 25, 2023, with application number 202311240906.6, and priority to the Chinese patent application with the invention name “Communication Method and Communication Device”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and more particularly, to a communication method and a communication device. Background Art

[0003] In wireless communications, network devices can periodically broadcast synchronization signals, which terminal devices can receive. Based on the synchronization signal, the terminal device receives the physical downlink control channel (PDCCH) and the physical downlink shared channel (PDSCH) scheduled by the PDCCH. Through the PDSCH, the terminal device can obtain the system information carried by the PDSCH and then perform corresponding operations based on the system information, such as obtaining random access resource configuration information and performing random access. For the system information transmission scenario of a multi-beam system, how to transmit the system information is an issue worth considering.

[0004] Summary of the Invention

[0005] The present application provides a communication method and a communication device, which can realize joint reception of multi-beam system information and improve transmission performance.

[0006] In a first aspect, a communication method is provided, which can be performed by an apparatus. The apparatus can be a network device, or can be a component of a network device (e.g., a chip, a chip system, or a circuit), which is not limited in this application. The following is an example of a network device.

[0007] The method may include: a network device sends N synchronization signals, where N is an integer greater than 1; the network device sends M physical downlink control channels (PDCCHs), where the M PDCCHs are used to schedule system information corresponding to the N synchronization signals or N beams, where the system information corresponding to the N synchronization signals or N beams is system information sent within the same time window, where the information carried by the M PDCCHs is the same, and where M is an integer greater than 1 or equal to 1.

[0008] Among them, the N beams are beams corresponding to N synchronization signals.

[0009] As an example, M=N.

[0010] Based on the above technical solution, the M PDCCHs used to schedule the system information of N synchronization signals (or N beams) carry the same information, so the receiving end can jointly receive (or jointly detect) the N PDCCHs, thereby improving transmission performance and enhancing user experience.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the information carried by each PDCCH in the M PDCCHs includes at least one of the following: modulation and coding scheme, time domain resource allocation, frequency domain resource allocation, redundant version, new data indication, resource mapping method, and demodulation reference signal symbol position.

[0012] In combination with the first aspect, in some implementations of the first aspect, the method further includes: the network device sends N PDSCHs, and the N PDSCHs include the N synchronization signals or system information corresponding to the N beams.

[0013] Based on the above technical solution, system information is carried on the PDSCH. The information carried by the PDCCH may include PDSCH scheduling information. The same information carried by the PDCCH also means the same PDSCH scheduling information. Because the scheduling information of the N PDSCHs is the same, the receiving end can jointly receive the N PDSCHs, thereby improving transmission performance and enhancing the user experience.

[0014] In combination with the first aspect, in certain implementations of the first aspect, the N PDSCHs include a first PDSCH, and the index of the redundant version of the first PDSCH is associated with at least one of the following: the index of the first PDSCH, the index of the beam corresponding to the first PDSCH, the index of the synchronization signal corresponding to the first PDSCH, and the value of N.

[0015] Based on the above technical solution, the index of the redundant version of the PDSCH can be associated with at least one of the above items. For example, the index of the redundant version of the PDSCH can be associated with the index of the synchronization signal. This allows different synchronization signals to have different redundant version indices for the PDSCH, thereby improving PDSCH transmission performance. Another example is that the index of the redundant version of the PDSCH can be associated with the value of N. This allows different PDSCHs to have the same redundant version index, thereby simplifying joint reception at the receiving end.

[0016] In combination with the first aspect, in certain implementations of the first aspect, the redundancy version of each PDSCH in the N PDSCHs is the same.

[0017] Based on the above technical solution, the indexes of the redundant versions of the various PDSCHs are the same, which makes joint reception at the receiving end simpler.

[0018] In combination with the first aspect, in some implementations of the first aspect, the method further includes: the network device sends first indication information, where the first indication information indicates a value of N.

[0019] In combination with the first aspect, in certain implementations of the first aspect, the first indication information is any one of: the synchronization signal, the demodulation reference signal corresponding to the PDCCH, the demodulation reference signal corresponding to the PDSCH, or the demodulation reference signal corresponding to the synchronization signal.

[0020] In combination with the first aspect, in some implementations of the first aspect, the value of N is any one of the following: 2, 4, 6, 8.

[0021] In combination with the first aspect, in some implementations of the first aspect, the method further includes: the network device sends second indication information, the second indication information indicates that the information carried by the M PDCCHs is the same, or the second indication information indicates joint reception of the M PDCCHs.

[0022] Based on the above technical solution, the network device can notify the receiving end whether to jointly receive the M PDCCHs, so that the receiving end can directly determine whether to jointly receive the M PDCCHs based on the second indication information.

[0023] In combination with the first aspect, in certain implementations of the first aspect, the second indication information is any one of the following: the synchronization signal, the demodulation reference signal corresponding to the PDCCH, the demodulation reference signal corresponding to the PDSCH, or the demodulation reference signal corresponding to the synchronization signal.

[0024] In combination with the first aspect, in certain implementations of the first aspect, the N synchronization signals satisfy any one of the following: the time domain resources occupied by two adjacent synchronization signals among the N synchronization signals are adjacent; the interval between the time domain resources occupied by two adjacent synchronization signals among the N synchronization signals is the same; the indexes of two adjacent synchronization signals among the N synchronization signals are adjacent; or, the interval between the indexes of two adjacent synchronization signals among the N synchronization signals is the same.

[0025] In combination with the first aspect, in certain implementations of the first aspect, at least one of the following information corresponding to each PDCCH in the M PDCCHs is the same: frequency domain resource position, mapped resource position, number of mapped resources, time domain resource position.

[0026] In a second aspect, a communication method is provided, which can be performed by an apparatus. The apparatus can be a terminal device, or can also be a component of a terminal device (such as a chip or chip system or circuit), which is not limited in this application. The following example uses a terminal device as an example for illustration.

[0027] The method may include: a terminal device receives N synchronization signals, where N is an integer greater than 1; the terminal device receives M physical downlink control channels (PDCCHs), where the M PDCCHs are used to schedule system information corresponding to the N synchronization signals or N beams, where the system information corresponding to the N synchronization signals or N beams is system information sent within the same time window, where the information carried by the M PDCCHs is the same, and where M is an integer greater than 1 or equal to 1.

[0028] In combination with the second aspect, in certain implementations of the second aspect, the information carried by each PDCCH in the M PDCCHs includes at least one of the following: modulation and coding scheme, time domain resource allocation, frequency domain resource allocation, redundant version, new data indication, resource mapping method, and demodulation reference signal symbol position.

[0029] In combination with the second aspect, in some implementations of the second aspect, the method further includes: the terminal device receives N PDSCHs, and the N PDSCHs include the N synchronization signals or system information corresponding to the N beams.

[0030] In combination with the second aspect, in certain implementations of the second aspect, the N PDSCHs include a first PDSCH, and the index of the redundant version of the first PDSCH is associated with at least one of the following: the index of the first PDSCH, the index of the beam corresponding to the first PDSCH, the index of the synchronization signal corresponding to the first PDSCH, and the value of N.

[0031] In combination with the second aspect, in certain implementations of the second aspect, the redundancy version of each PDSCH in the N PDSCHs is the same.

[0032] In combination with the second aspect, in some implementations of the second aspect, the method further includes: the terminal device receives first indication information, where the first indication information indicates a value of N.

[0033] In combination with the second aspect, in certain implementations of the second aspect, the first indication information is any one of: the synchronization signal, the demodulation reference signal corresponding to the PDCCH, the demodulation reference signal corresponding to the PDSCH, or the demodulation reference signal corresponding to the synchronization signal.

[0034] In combination with the second aspect, in some implementations of the second aspect, the value of N is any one of the following: 2, 4, 6, 8.

[0035] In combination with the second aspect, in certain implementations of the second aspect, it is characterized in that the method also includes: the terminal device receives second indication information, the second indication information indicates that the information carried by the M PDCCHs is the same, or the second indication information indicates the joint reception of the M PDCCHs; or the terminal device itself determines the joint reception of the M PDCCHs.

[0036] In combination with the second aspect, in certain implementations of the second aspect, the second indication information is any one of the following: the synchronization signal, the demodulation reference signal corresponding to the PDCCH, the demodulation reference signal corresponding to the PDSCH, or the demodulation reference signal corresponding to the synchronization signal.

[0037] In combination with the second aspect, in certain implementations of the second aspect, the N synchronization signals satisfy any one of the following: the time domain resources occupied by two adjacent synchronization signals among the N synchronization signals are adjacent; the interval between the time domain resources occupied by two adjacent synchronization signals among the N synchronization signals is the same; the indexes of two adjacent synchronization signals among the N synchronization signals are adjacent; or, the interval between the indexes of two adjacent synchronization signals among the N synchronization signals is the same.

[0038] In combination with the second aspect, in certain implementations of the second aspect, at least one of the following information corresponding to each PDCCH in the M PDCCHs is the same: frequency domain resource position, mapped resource position, number of mapped resources, and time domain resource position.

[0039] The beneficial effects of the second aspect can be referred to the relevant description of the first aspect and will not be repeated here.

[0040] In a third aspect, a communication method is provided, which can be performed by an apparatus. The apparatus can be a network device, or a component of a network device (such as a chip or chip system or circuit), which is not limited in this application. The following is an example of a network device.

[0041] The method may include: the network device sends at least one third indication information, the at least one third indication information indicates the scheduling information of each PDSCH in N physical downlink shared channels PDSCH, the N PDSCHs include N synchronization signals or system information corresponding to N beams, the N synchronization signals or the system information corresponding to N beams are system information sent within the same time window, the third indication information includes at least one of the following: the synchronization signal, the demodulation reference signal corresponding to the PDSCH, or the demodulation reference signal corresponding to the synchronization signal, N is an integer greater than 1; the network device sends the N PDSCHs.

[0042] The third indication information is information other than PDCCH.

[0043] Based on the above technical solution, system information can be transmitted without PDCCH. In other words, PDSCH scheduling information can be scheduled by other information (i.e., third indication information) outside of PDCCH, without the need for PDCCH scheduling. Consequently, network devices do not need to send PDCCH. In this way, the resources originally used to transmit PDCCH can now be used to transmit PDSCH, thereby improving coverage.

[0044] In combination with the third aspect, in certain implementations of the third aspect, the scheduling information of each PDSCH in the N PDSCHs includes at least one of the following: modulation and coding scheme, time domain resource allocation, frequency domain resource allocation, redundant version, new data indication, resource mapping method, and demodulation reference signal symbol position.

[0045] In combination with the third aspect, in certain implementations of the third aspect, the N PDSCHs include a first PDSCH, and a frequency domain resource position of the first PDSCH is associated with a frequency domain resource position of a synchronization signal corresponding to the first PDSCH.

[0046] Based on the above technical solution, the frequency domain resource position of the PDSCH corresponding to the synchronization signal can be determined based on the frequency domain resource position of the synchronization signal, thereby saving the signaling overhead caused by separately notifying the frequency domain resource position of the PDSCH.

[0047] In combination with the third aspect, in certain implementations of the third aspect, the frequency domain resources of the first PDSCH are associated with the frequency domain resources of the synchronization signal corresponding to the first PDSCH, including: the starting position of the frequency domain resources of the first PDSCH is the same as the starting position of the frequency domain resources of the synchronization signal corresponding to the first PDSCH; or, the ending position of the frequency domain resources of the first PDSCH is determined based on the starting position of the frequency domain resources of the synchronization signal corresponding to the first PDSCH, and the scheduling bandwidth information indicated by the synchronization signal corresponding to the first PDSCH.

[0048] In combination with the third aspect, in some implementations of the third aspect, the method further includes: the network device sends first indication information, where the first indication information indicates a value of N.

[0049] In combination with the third aspect, in certain implementations of the third aspect, the first indication information is any one of the following: the synchronization signal, the demodulation reference signal corresponding to the PDSCH, or the demodulation reference signal corresponding to the synchronization signal.

[0050] In combination with the third aspect, in some implementations of the third aspect, the value of N is any one of the following: 2, 4, 6, 8.

[0051] In combination with the third aspect, in certain implementations of the third aspect, the method further includes: the network device sends fourth indication information, and the fourth indication information indicates whether the network device sends physical downlink control information PDCCH for scheduling the N PDSCHs.

[0052] Based on the above technical solution, the network device can notify the receiving end whether the PDSCH is scheduled by the PDCCH, or whether the PDSCH is scheduled by the PDCCH or by the third indication information, which can facilitate the receiving end to detect the PDSCH.

[0053] In combination with the third aspect, in certain implementations of the third aspect, the fourth indication information is any one of the following: the synchronization signal, the demodulation reference signal corresponding to the PDSCH, or the demodulation reference signal corresponding to the synchronization signal.

[0054] In combination with the third aspect, in certain implementations of the third aspect, the N PDSCHs include a first PDSCH, and the index of the redundant version of the first PDSCH is associated with at least one of the following: the index of the first PDSCH, the index of the beam corresponding to the first PDSCH, the index of the synchronization signal corresponding to the first PDSCH, and the value of N.

[0055] In combination with the third aspect, in certain implementations of the third aspect, scheduling information of each PDSCH in the N PDSCHs is the same.

[0056] Based on the above technical solution, the scheduling information of the N PDSCHs is the same, so the receiving end can jointly receive the N PDSCHs, thereby improving transmission performance and enhancing user experience.

[0057] In a fourth aspect, a communication method is provided, which can be performed by an apparatus. The apparatus can be a terminal device, or can be a component of a terminal device (such as a chip or chip system or circuit), which is not limited in this application. The following example is illustrated using a terminal device as an example.

[0058] The method may include: the terminal device receives at least one third indication information, the at least one third indication information indicates the scheduling information of each PDSCH in N physical downlink shared channels PDSCH, the N PDSCHs include N synchronization signals or system information corresponding to N beams, the N synchronization signals or the system information corresponding to N beams are system information sent within the same time window, the third indication information includes at least one of the following: the synchronization signal, the demodulation reference signal corresponding to the PDSCH, or the demodulation reference signal corresponding to the synchronization signal, N is an integer greater than 1; the terminal device receives the N PDSCHs based on the at least one third indication information.

[0059] In combination with the fourth aspect, in certain implementations of the fourth aspect, the scheduling information of each PDSCH in the N PDSCHs includes at least one of the following: modulation and coding scheme, time domain resource allocation, frequency domain resource allocation, redundant version, new data indication, resource mapping method, and demodulation reference signal symbol position.

[0060] In combination with the fourth aspect, in certain implementations of the fourth aspect, the N PDSCHs include a first PDSCH, and a frequency domain resource position of the first PDSCH is associated with a frequency domain resource position of a synchronization signal corresponding to the first PDSCH.

[0061] In combination with the fourth aspect, in certain implementations of the fourth aspect, the frequency domain resources of the first PDSCH are associated with the frequency domain resources of the synchronization signal corresponding to the first PDSCH, including: the starting position of the frequency domain resources of the first PDSCH is the same as the starting position of the frequency domain resources of the synchronization signal corresponding to the first PDSCH; or, the ending position of the frequency domain resources of the first PDSCH is determined based on the starting position of the frequency domain resources of the synchronization signal corresponding to the first PDSCH, and the scheduling bandwidth information indicated by the synchronization signal corresponding to the first PDSCH.

[0062] In combination with the fourth aspect, in some implementations of the fourth aspect, the method further includes: the terminal device receives first indication information, and the first indication information indicates the value of N.

[0063] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first indication information is any one of the following: the synchronization signal, the demodulation reference signal corresponding to the PDSCH, or the demodulation reference signal corresponding to the synchronization signal.

[0064] In combination with the fourth aspect, in some implementations of the fourth aspect, the value of N is any one of the following: 2, 4, 6, 8.

[0065] In combination with the fourth aspect, in certain implementations of the fourth aspect, the method further includes: the terminal device receives fourth indication information, and the fourth indication information indicates whether the network device sends physical downlink control information PDCCH for scheduling the N PDSCHs.

[0066] In combination with the fourth aspect, in certain implementations of the fourth aspect, the fourth indication information is any one of the following: the synchronization signal, the demodulation reference signal corresponding to the PDSCH, or the demodulation reference signal corresponding to the synchronization signal.

[0067] In combination with the fourth aspect, in certain implementations of the fourth aspect, the N PDSCHs include a first PDSCH, and the index of the redundant version of the first PDSCH is associated with at least one of the following: the index of the first PDSCH, the index of the beam corresponding to the first PDSCH, the index of the synchronization signal corresponding to the first PDSCH, and the value of N.

[0068] In combination with the fourth aspect, in certain implementations of the fourth aspect, the scheduling information of each PDSCH in the N PDSCHs is the same.

[0069] The beneficial effects of the fourth aspect can be referred to the relevant description of the third aspect and will not be repeated here.

[0070] In a fifth aspect, a communication method is provided, which can be performed by an apparatus. The apparatus can be a network device, or can be a component of a network device (such as a chip or chip system or circuit), which is not limited in this application. The following is an example of a network device.

[0071] The method may include: a network device determines scheduling information of N physical downlink shared channels (PDSCHs), the N PDSCHs include N synchronization signals or system information corresponding to N beams, the system information corresponding to the N synchronization signals or N beams is system information sent within the same time window, the scheduling information of each PDSCH in the N PDSCHs is the same, and N is an integer greater than 1; the network device sends the N PDSCHs.

[0072] Based on the above technical solution, the scheduling information of the N PDSCHs is the same, so the receiving end can jointly receive the N PDSCHs, thereby improving transmission performance and enhancing user experience.

[0073] In combination with the fifth aspect, in certain implementations of the fifth aspect, the method further includes: the network device sends M physical downlink control channels PDCCHs, the M PDCCHs are used to schedule the system information corresponding to the N synchronization signals or N beams, the information carried by the M PDCCHs is the same, and M is an integer greater than 1 or equal to 1.

[0074] Regarding this solution, please refer to the first aspect and will not go into details here.

[0075] In combination with the fifth aspect, in certain implementations of the fifth aspect, the method further includes: the method further includes: the network device sends at least one third indication information, and the at least one third indication information indicates the scheduling information of each PDSCH in the N PDSCHs.

[0076] Regarding this solution, please refer to the third aspect, which will not be elaborated here.

[0077] In combination with the fifth aspect, in certain implementations of the fifth aspect, the method further includes: the third indication information includes at least one of the following: the synchronization signal, the demodulation reference signal corresponding to the PDSCH, or the demodulation reference signal corresponding to the synchronization signal.

[0078] In a sixth aspect, a communication method is provided, which can be performed by an apparatus. The apparatus can be a terminal device, or can be a component of a terminal device (such as a chip or chip system or circuit), which is not limited in this application. The following example is illustrated using a terminal device as an example.

[0079] The method may include: the terminal device determines the scheduling information of N physical downlink shared channels (PDSCHs), the N PDSCHs include N synchronization signals or system information corresponding to N beams, the system information corresponding to the N synchronization signals or N beams is system information sent within the same time window, the scheduling information of each PDSCH in the N PDSCHs is the same, and N is an integer greater than 1; the terminal device receives the N PDSCHs.

[0080] In combination with the sixth aspect, in certain implementations of the sixth aspect, the method also includes: the terminal device receives M physical downlink control channels PDCCH, the M PDCCHs are used to schedule the system information corresponding to the N synchronization signals or N beams, the information carried by the M PDCCHs is the same, and M is an integer greater than 1 or equal to 1.

[0081] In combination with the sixth aspect, in certain implementations of the sixth aspect, the method further includes: the terminal device receives at least one third indication information, and the at least one third indication information indicates scheduling information of each PDSCH in the N PDSCHs.

[0082] In combination with the sixth aspect, in certain implementations of the sixth aspect, the third indication information includes at least one of the following: the synchronization signal, the demodulation reference signal corresponding to the PDSCH, or the demodulation reference signal corresponding to the synchronization signal.

[0083] The beneficial effects of the sixth aspect can be referred to the relevant description of the fifth aspect and will not be repeated here.

[0084] In a seventh aspect, a communication device is provided, the device being configured to execute the method provided in any one of aspects 1 to 6. Specifically, the device may include units and / or modules, such as a processing unit and / or a communication unit, for executing the method provided in any one of the aforementioned implementations of aspects 1 to 6.

[0085] In one implementation, the apparatus is a communication device (e.g., a terminal device or a network device). When the apparatus is a communication device, the communication unit may be a transceiver or an input / output interface; the processing unit may be at least one processor. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input / output interface may be an input / output circuit.

[0086] In another implementation, the apparatus is a chip, chip system, or circuit used in a communication device. When the apparatus is a chip, chip system, or circuit used in a communication device, the communication unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit; and the processing unit may be at least one processor, processing circuit, or logic circuit.

[0087] In an eighth aspect, a communication device is provided, comprising: a memory for storing programs; and at least one processor for executing computer programs or instructions stored in the memory to execute the method provided in any one of the above-mentioned implementations of any one of the above-mentioned first to sixth aspects.

[0088] In one implementation, the apparatus is a communication device (such as a terminal device or a network device).

[0089] In another implementation, the apparatus is a chip, a chip system, or a circuit used in a communication device.

[0090] In a ninth aspect, the present application provides a processor for executing the methods provided in the above aspects.

[0091] For the operations such as sending and acquiring / receiving involved in the processor, unless otherwise specified, or if they do not conflict with their actual functions or internal logic in the relevant descriptions, they can be understood as operations such as processor output and input, or as sending and receiving operations performed by the radio frequency circuit and antenna. This application does not limit this.

[0092] In a tenth aspect, a computer-readable storage medium is provided, which stores a program code for execution by a device, and the program code includes a method provided by any one of the above-mentioned implementation methods for executing any one of the above-mentioned first to sixth aspects.

[0093] In the eleventh aspect, a computer program product comprising instructions is provided, which, when run on a computer, enables the computer to execute the method provided by any one of the above-mentioned implementations of any one of the above-mentioned first to sixth aspects.

[0094] In the twelfth aspect, a chip is provided, which includes a processor and a communication interface. The processor reads instructions stored in the memory through the communication interface and executes the method provided by any of the above-mentioned implementation methods of any of the above-mentioned aspects from the first to the sixth aspects.

[0095] Optionally, as an implementation method, the chip also includes a memory, in which a computer program or instruction is stored, and the processor is used to execute the computer program or instruction stored in the memory. When the computer program or instruction is executed, the processor is used to execute the method provided in any one of the above-mentioned implementation methods of any one of the first to sixth aspects.

[0096] In a thirteenth aspect, a communication system is provided, comprising a terminal device and a network device. The network device is configured to execute the method provided in any one of the implementations of the first aspect, and the terminal device is configured to execute the method provided in any one of the implementations of the second aspect; or, the network device is configured to execute the method provided in any one of the implementations of the third aspect, and the terminal device is configured to execute the method provided in any one of the implementations of the fourth aspect; or, the network device is configured to execute the method provided in any one of the implementations of the fifth aspect, and the terminal device is configured to execute the method provided in any one of the implementations of the sixth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0097] FIG1 is a schematic diagram of a wireless communication system applicable to an embodiment of the present application.

[0098] FIG2 is a schematic diagram of information transmission applicable to an embodiment of the present application.

[0099] FIG3 is a schematic diagram of a transmission method of SSB and SIB1.

[0100] FIG4 is a schematic diagram of using different beams to transmit information.

[0101] FIG5 is a schematic diagram of a communication method 500 provided in an embodiment of the present application.

[0102] FIG6 is a schematic diagram of a communication method 600 provided in another embodiment of the present application.

[0103] FIG7 is a schematic diagram of SSB and system information transmission applicable to solution 1.

[0104] FIG8 is a schematic diagram of SSB and system information transmission applicable to solution 2.

[0105] FIG. 9 is another schematic diagram of SSB and system information transmission applicable to solution 2.

[0106] FIG10 is a schematic diagram of a communication method 1000 provided in another embodiment of the present application.

[0107] Figure 11 is a schematic diagram of SSB and system information transmission without PDCCH transmission applicable to an embodiment of the present application.

[0108] FIG12 is a schematic flowchart of a communication method 1200 provided according to an embodiment of the present application.

[0109] FIG13 is a schematic block diagram of a communication device 1300 provided in an embodiment of the present application.

[0110] FIG14 is a schematic diagram of another communication device 1400 provided in an embodiment of the present application.

[0111] FIG15 is a schematic diagram of a chip system 1500 provided in accordance with an embodiment of the present application. DETAILED DESCRIPTION

[0112] The technical solution in this application will be described below with reference to the accompanying drawings.

[0113] The technical solutions provided in this application can be applied to various communication systems, such as: fifth generation (5G) or new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, etc. The technical solutions provided in this application can also be applied to low-frequency scenarios, high-frequency scenarios, terahertz, optical communications, etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation (6G) mobile communication system. The technical solutions provided in this application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and Internet of Things (IoT) communication systems. The technical solutions provided in this application can also be applied to non-terrestrial network (NTN) systems such as intersatellite communication and satellite communication. As an example, a satellite communication system includes a satellite base station and terminal devices. The satellite base station provides communication services to the terminal devices. The satellite base station can also communicate with other base stations. Satellites can function as both base stations and terminal devices. Satellites can refer to drones, hot air balloons, low-orbit satellites, medium-orbit satellites, high-orbit satellites, and other satellites. Satellites can also refer to non-ground base stations or non-ground devices.

[0114] A device in a communication system can send signals to or receive signals from another device. These signals may include information, signaling, or data. The term "device" can also be replaced by an entity, network entity, network element, communication device, communication module, node, communication node, and the like. This disclosure uses devices as examples for description. For example, a communication system may include at least one terminal device and at least one network device. A network device can send downlink signals to a terminal device, and / or a terminal device can send uplink signals to a network device.

[0115] The terminal devices in the embodiments of the present application include various devices with wireless communication functions, which can be used to connect people, objects, machines, etc. The terminal devices can be widely used in various scenarios, such as: cellular communication, D2D, V2X, peer to peer (P2P), M2M, MTC, IoT, virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city drones, robots, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery, etc. The terminal device can be a terminal in any of the above scenarios, such as an MTC terminal, an IoT terminal, etc. The terminal device may be a user equipment (UE) of the third generation partnership project (3GPP) standard, a terminal, a fixed device, a mobile station device or a mobile device, a subscriber unit, a handheld device, a vehicle-mounted device, a wearable device, a cellular phone, a smart phone, a SIP phone, a wireless data card, a personal digital assistant (PDA), a computer, a tablet computer, a notebook computer, a wireless modem, a handheld device, a laptop computer, a computer with wireless transceiver function, a smart book, a vehicle, a satellite, a global positioning system (GPS) device, a target tracking device, an aircraft (such as a drone, a helicopter, a multi-copter, a quadcopter, or an airplane), a ship, a remote control device, a smart home device, an industrial device, or a device built into the above-mentioned device (such as a communication module, a modem or a chip in the above-mentioned device), or other processing devices connected to a wireless modem. For ease of description, the terminal device will be described below by taking the terminal or UE as an example.

[0116] It should be understood that in some scenarios, a UE can also be used to act as a base station. For example, a UE can act as a scheduling entity that provides sidelink signals between UEs in scenarios such as V2X, D2D, or P2P.

[0117] In the embodiments of the present application, the device for implementing the function of the terminal device, i.e., the terminal device, can be the terminal device, or a device capable of supporting the terminal device to implement the function, such as a chip system or chip, which can be installed in the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0118] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. Base station can broadly cover various names as follows, or replace the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point, master station, auxiliary station, multi-standard wireless (motor slide retainer, MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, modem or chip used to be set in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in D2D, V2X, and M2M communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the network equipment.

[0119] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0120] In some deployments, the network device mentioned in the embodiments of the present application may be a device including a CU, or a DU, or a device including a CU and a DU, or a control plane CU node (central unit control plane (central unit-control plane, CU-CP)) and a user plane CU node (central unit user plane (central unit-user plane, CU-UP)) and a DU node.

[0121] In the embodiments of the present application, the apparatus for implementing the function of the network device can be the network device, or it can be an apparatus capable of supporting the network device to implement the function, such as a chip system or chip, which can be installed in the network device. In the embodiments of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0122] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0123] First, a communication system applicable to the embodiments of the present application is briefly introduced as follows.

[0124] Refer to FIG1 , which is a schematic diagram of a wireless communication system applicable to an embodiment of the present application.

[0125] As shown in Figure 1, the wireless communication system includes a radio access network 100. Radio access network 100 can be a next-generation (e.g., 6G or higher) radio access network, or a traditional (e.g., 5G, 4G, 3G, or 2G) radio access network. One or more terminal devices (120a-120j, collectively referred to as 120) can be connected to each other or to one or more network devices (110a, 110b, collectively referred to as 110) in radio access network 100. Network elements in the wireless communication system are connected via interfaces (e.g., NG, Xn), or air interfaces.

[0126] FIG1 is only a schematic diagram. The wireless communication system may further include other devices, such as core network devices, wireless relay devices and / or wireless backhaul devices, which are not shown in FIG1 .

[0127] In order to facilitate a better understanding of the technical solution of this application, some related technologies involved in the technical solution of this application are introduced.

[0128] 1. Antenna port: This is a logical concept that does not directly correspond to a physical antenna. Antenna ports are typically associated with reference signals and can be understood as a transceiver interface on the channel through which the reference signal travels. For low-frequency systems, an antenna port may correspond to one or more antenna elements, which jointly transmit reference signals. The receiver can treat them as a whole without distinguishing between the elements. For high-frequency systems, an antenna port may correspond to a beam. Similarly, the receiver can treat the beam as an interface without distinguishing between individual elements.

[0129] 2. Port group: A collection of multiple antenna ports. One possible way is to group multiple digital ports of a network device to form multiple port groups. Another possible way (especially under a hybrid digital-analog beam architecture) is that a port group (or digital-analog port group) can be multiple digital ports corresponding to the same analog beam; or, a port group (or digital-analog port group) can be a collection of digital ports corresponding to multiple analog beams; or, multiple digital ports of the same analog beam are divided into multiple subsets, each of which can be called a port group (or digital-analog port group).

[0130] 3. Beam: A communication resource. Different beams can be considered different resources. Different beams can send the same or different information.

[0131] The NR protocol uses a beam as a spatial domain filter, also known as a spatial filter or spatial parameter. The beam used to send signals is called a transmission beam (Tx beam), and the beam used to receive signals is called a reception beam (Rx beam).

[0132] The transmit beam may refer to the distribution of signal strength in different directions in space after the signal is transmitted by the antenna, and the receive beam may refer to the distribution of signal strength in different directions in space of the wireless signal received from the antenna.

[0133] Furthermore, the beam can be a wide beam, a narrow beam, or other types of beams. The beam forming technology can be beamforming technology or other technologies. The beamforming technology can specifically be digital beamforming technology, analog beamforming technology, or hybrid digital / analog beamforming technology.

[0134] As an example, multiple beams having the same or similar communication characteristics may be considered as one beam.

[0135] A beam can correspond to one or more antenna ports, which are used to transmit data channels, control channels, and sounding signals. The one or more antenna ports corresponding to a beam can also be regarded as an antenna port set.

[0136] 4. Reference Signal: This term may also be referred to as a pilot, reference sequence, or benchmark signal. For consistency, the term "reference signal" will be used in the following descriptions. A reference signal is a physical signal that carries a sequence and is transmitted to achieve a specific function. Specifically, a reference signal is a physical signal generated by mapping a specific sequence onto the corresponding resources using a pre-transmitted resource mapping method.

[0137] As an example, uplink communication includes the transmission of uplink physical channels and uplink signals. The uplink physical channels include, but are not limited to, random access channels (PRACH), physical uplink control channels (PUCCH), and physical uplink shared channels (PUSCH). The uplink signals include, but are not limited to, sounding reference signals (SRS), demodulation reference signals (DMRS), uplink phase noise tracking reference signals (PTRS), and uplink positioning reference signals. DMRS includes, but is not limited to, uplink control channel demodulation reference signals (PUCCH-DMRS) and uplink data channel demodulation reference signals (PUSCH-DMRS).

[0138] As an example, downlink communication includes the transmission of downlink physical channels and downlink signals. Wherein, downlink physical channels include but are not limited to: physical broadcast channel (PBCH), downlink control channel (PDCCH), downlink data channel (PDSCH), etc. Wherein, downlink signals include but are not limited to: primary synchronization signal (PSS) / secondary synchronization signal (SSS), DMRS, PTRS, channel status information reference signal (CSI-RS), cell reference signal (CRS), time / frequency tracking reference signal (TRS), positioning reference signal, etc. Wherein, DMRS includes but is not limited to: downlink control channel demodulation reference signal PDCCH-DMRS, downlink data channel demodulation reference signal PDSCH-DMRS.

[0139] It should be understood that the reference signals listed above are only examples and should not constitute any limitation to this application. This application does not exclude the possibility of defining other reference signals in future protocols to achieve the same or similar functions.

[0140] 5. Resources: Data or information can be carried by resources.

[0141] In the time domain, resources may include one or more time domain units (or time units). A time domain unit may be a symbol, an orthogonal frequency division multiplexing (OFDM) symbol, a mini-slot, a slot, a partial slot, a subframe, or a radio frame.

[0142] In the frequency domain, resources can include one or more frequency domain units. A frequency domain unit can be a resource block (RB), a subcarrier, a resource block group (RBG), a subband, a precoding resource block group (PRG), a bandwidth part (BWP), a carrier, or a serving cell.

[0143] 6. Synchronization Signal Block (SSB): Also known as a synchronization signal. This block may include at least one of the following: a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a physical broadcast channel block (PBCH), and a demodulation reference signal. For example, the primary synchronization signal and the secondary synchronization signal are referred to as a synchronization signal (SS).

[0144] As an example, SSB can be used to implement the following functions: 1) cell synchronization and acquisition of the master information block (MIB); and 2) network device-side beam training. A brief introduction is given below.

[0145] 1) Cell synchronization and MIB acquisition: The PSS and SSS in the SSB can carry the cell physical identifier (PCI). The terminal device obtains the PCI by detecting the PSS and SSS. In addition, the PBCH in the SSB can carry the SSB index. Each SSB index corresponds to the location where the SSB is sent. Cell synchronization can be completed by detecting the SSB index and the time when the SSB is received. In addition, the PBCH in the SSB can carry the MIB, so the MIB can also be obtained based on the SSB.

[0146] 2) Network Device-Side Beam Training: An SSB pattern can contain multiple SSB indices. Different SSB indices correspond to different transmit beams of the network device. The terminal device can detect the SSB and select the transmit beam corresponding to the SSB with better quality, thereby completing beam training. Furthermore, the terminal device can also complete receive beam training on the terminal device side by using multiple receive beams to receive the same SSB. For ease of description, this example uses SSB 1, a high-quality SSB, as the network device's transmit beam 1. The functions of the transmitting beam 1 mainly include: 1) the terminal device receives the system information block 1 (SIB1) or paging sent by the network device through the transmitting beam 1 at the position corresponding to SSB 1, thereby improving the coverage of SIB1 or paging; 2) the terminal device sends the physical random access channel (PRACH) at the position corresponding to the SSB 1, and the network device can use beam 1 to receive the above-mentioned PRACH, thereby improving the probability of successful PRACH reception; 3) after the terminal device completes the initial access and establishes the radio resource control (RRC) connection, the network device can perform more fine-grained beam training based on beam 1 to reduce the overhead of fine beam training.

[0147] 7. System information: also known as downlink common data, downlink common channels, cell broadcast information, or cell common information. For example, system information may include various system information blocks (SIBs), such as SIB1; or, system information may also include MIBs.

[0148] SIB1 is generally carried on PDSCH. Usually, the network device can indicate the time-frequency position and transmission parameters of the PDSCH carrying SIB1 to the terminal device through downlink control information (DCI). The candidate time domain position and frequency domain position of the above DCI can be indicated by MIB.

[0149] For example, the MIB includes control resource set zero (CORESET0) and common search space zero (CSS0), where CORESET0 is used to indicate the candidate frequency domain position of the DCI that schedules SIB1, and CSS0 is used to indicate the candidate time domain position of the DCI that schedules SIB1. The network device can use the same beam as that used to send the SSB to send the SIB1 corresponding to the SSB. Accordingly, when the terminal device receives SIB1, it can use the same beam as that used to receive the SSB to receive the SIB1 corresponding to the SSB. Among them, the SIB1 corresponding to the SSB indicates that the MIB in the SSB is used to indicate the frequency domain position and time domain position of the DCI that schedules the SIB1.

[0150] One possible understanding is that SIB1 can be considered as the first system message sent after MIB, or SIB1 can also be considered as a system message including time-frequency resource indication information of the random access channel (RACH), or SIB1 can also be considered as information carried in the PDSCH scheduled by the PDCCH determined by CORESET0 and CSS0.

[0151] It can be understood that the above descriptions about SIB1 and SSB are merely exemplary and do not limit the scope of protection of the embodiments of the present application.

[0152] It can also be understood that in the embodiments of the present application, RACH and PRACH are sometimes used interchangeably, and when the difference is not emphasized, they represent the same meaning.

[0153] In addition, downlink control signals and downlink data signals can be referred to as channels, for example, PDCCH, PBCH, and PDSCH. For high layers, these channels correspond to resource elements (REs) that carry bit information of the upper layer (for example, layer 2). For the air interface, these channels carry wireless signals. Taking into account channel fading, these channels are often sent together with DMRS, so that the receiving end can obtain the channel, perform demodulation, and ultimately recover the bit information. Generally, these DMRS also occupy resource elements, but these resource elements do not carry bit information of the upper layer. In addition, PDCCH generally has a corresponding relationship with PDSCH, specifically: PDCCH carries DCI, and DCI is used to indicate the scheduling information of PDSCH (or configuration information, for example, transmission parameters such as time-frequency position and modulation information).

[0154] 8. Random access (RA): The terminal device can perform random access through the information contained in SIB1.

[0155] Referring to Figure 2 , which is a schematic diagram of information transmission applicable to an embodiment of the present application, as shown in Figure 2 , a network device may send an SSB and SIB1 to a terminal device, and the terminal device may receive or detect the SSB and SIB1 accordingly. If the terminal device receives the SSB and SIB1, initial access may be performed.

[0156] As an example, the following describes a possible random access method, namely four-step random access. Four-step random access is merely a name used to represent a random access method and does not limit the scope of the embodiments of this application. Four-step random access requires four steps of information exchange (Msg1, Msg2, Msg3, Msg4) between a terminal device and a network device. The basic process of the four-step random access process is as follows.

[0157] In step 1, the terminal device sends a random access preamble (also known as Msg1) to the network device. For example, the terminal device obtains random access configuration information, which includes the time-frequency resources used by the terminal device to send the random access preamble (such as RACH time-frequency resources) and the sequence used to send the random access preamble. The terminal device sends the random access preamble to the network device on the time-frequency resources.

[0158] For example, a network device may be configured with multiple RACH occasions. The terminal device may determine which RACH occasion to select, which preamble to send, and which transmit beam to use based on the SSB index measurement results. In one possible implementation, there is a correspondence between the SSB index and {RACH occasion, preamble index}. If the terminal device determines the SSB, it can determine the corresponding RACH occasion and preamble index. The preamble index represents the sequence index of the random access.

[0159] For example, the terminal device measures the SSB sent by the network device, such as measuring the reference signal received power (RSRP) of the SSB; the terminal device can select an SSB index whose RSRP is greater than a preset threshold (the preset threshold can be configured by a high layer or defined by a protocol), and determine the RACH occasion and preamble index set corresponding to the SSB index based on the correspondence between the SSB index and {RACH occasion, preamble index}.

[0160] Step 2: The network device sends a random access response (RAR) to the terminal device, which may also be referred to as Msg2. Specifically, after detecting the random access preamble, the network device sends Msg2 to the terminal device.

[0161] Step 3, the terminal device sends Msg3 to the network device. Specifically, after receiving Msg2, the terminal device first adjusts the uplink timing according to the timing advance instruction, and according to Msg2, sends an uplink message on the uplink resource allocated by Msg2, also called Msg3. If multiple terminal devices select the same random access preamble in step 1, it will cause resource conflicts. For example, the random access preamble of one of the multiple terminal devices is correctly received by the network device, and the network device sends Msg2 to the terminal device, and the multiple terminal devices can all receive the Msg2. The multiple terminal devices cannot determine which terminal device's random access preamble the network device has received through Msg2. At this time, these terminal devices may all receive Msg2 and send Msg3 respectively. Therefore, Msg3 includes the unique identifier of the terminal device, which is used to resolve resource conflicts.

[0162] In step 4, the network device sends a conflict resolution message to the terminal device. Specifically, the network device receives Msg3 from the terminal device and returns a conflict resolution message, also called Msg4, to the terminal device that successfully accessed. The network device carries the unique identifier in Msg3 in the conflict resolution message to specify the terminal device that successfully accessed. Other terminal devices that failed to successfully access will re-initiate random access.

[0163] It can be understood that the above specific process of random access is an exemplary description and does not limit the protection scope of the embodiments of the present application.

[0164] It can also be understood that FIG2 is only a simplified schematic diagram for ease of understanding, and the information transmission process may also include more steps, which are not shown in FIG2.

[0165] The above briefly explains the terms involved in this application, which will not be repeated in the following embodiments. In addition, the above explanation of the terms is only for ease of understanding and does not limit the scope of protection of the embodiments of this application.

[0166] The following introduces a current transmission method of SSB and SIB1.

[0167] Refer to FIG3 , which is a schematic diagram of a transmission method of SSB and SIB1.

[0168] As shown in Figure 3, taking 8 beams as an example, the transmission method of SSB and SIB1 is introduced. The network device periodically broadcasts the SSB signal, such as a period of 20ms, and the time slot position of the SSB is fixed. Similarly, the network device periodically broadcasts the SIB1 signal, including the PDDCH (such as called SIB1 PDCCH) and PDSCH (such as called SIB1 PDSCH) corresponding to the SIB1. Among them, the candidate time slot position corresponding to the SIB1 PDCCH is determined according to the MIB in the SSB. For example, for the SSB signal with a time index of i, the SIB1 PDCCH corresponding to the SSB signal is located in time slot n0 or time slot (n0+1). Among them, n0 satisfies: Where μ is the subcarrier spacing index, is the number of time slots in 10ms. O and M are constants whose specific values ​​may be indicated by the indication information in the system information. As an example, the value of O may be 0, 2, 2.5, 5, 7, or 7.5. As an example, the value of M may be 1 or 2.

[0169] Specifically, for SSB, at the candidate frequency domain position of an SSB, the terminal device detects the SSB with a period of 20ms. When the terminal device detects the SSB, the terminal device can attempt to detect the SIB1 PDCCH in time slot n0 or time slot (n0+1) based on the time index i of the SSB. When the terminal device detects the SIB1 PDCCH, it continues to receive the corresponding PDSCH and performs subsequent processes, such as the terminal device performing random access based on the SIB1 carried in the PDSCH. The PDSCH corresponding to different SSBs carries the same content, but the modulation order, code rate, time domain position, frequency position, etc. of these PDSCHs may be different. In this way, detection can only be performed based on their respective SSBs, and the transmission efficiency is low.

[0170] Refer to Figure 4, which is a schematic diagram of using different beams to transmit information. As shown in Figure 4, taking K beams as an example, K is an integer greater than 1. According to the existing method, the network device uses beam #0 to send PDCCH #0 to the terminal device, and the PDCCH #0 is used to schedule the scheduling information of PDSCH #0; the network device uses beam #1 to send PDCCH #1 to the terminal device, and the PDCCH #1 is used to schedule the scheduling information of PDSCH #1; the network device uses beam #K-1 to send PDCCH #K-1 to the terminal device, and the PDCCH #K-1 is used to schedule the scheduling information of PDSCH #K-1. According to the existing method, the PDCCHs corresponding to each beam are independent of each other, and the PDCCHs are different, so detection can only be performed based on their respective beams, and the transmission efficiency is low.

[0171] In view of this, the present application proposes a method to achieve joint detection of various beams and improve transmission efficiency.

[0172] Before introducing the solution of this application, the following points are explained.

[0173] (1) In this application, “indication” may include direct indication, indirect indication, explicit indication, and implicit indication. When describing that a certain indication information is used to indicate A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

[0174] In this application, the information indicated by the indication information is referred to as the information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein there is an association between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can also be achieved with the help of the arrangement order of each information agreed in advance (for example, stipulated by the protocol), thereby reducing the indication overhead to a certain extent. In addition, the information to be indicated can be sent together as a whole, or it can be divided into multiple sub-information and sent separately, and the sending period and / or sending time of these sub-information can be the same or different.

[0175] (2) In this application, "sending" and "receiving" indicate the direction of signal transmission. For example, "sending information to XX" can be understood as the destination of the information being XX, which can include direct sending through the air interface, and also include indirect sending through the air interface by other units or modules. "Receiving information from YY" can be understood as the source of the information being YY, which can include direct receiving from YY through the air interface, and also include indirect receiving from YY through the air interface from other units or modules. "Sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface. In other words, sending and receiving can be carried out between devices, for example, between a network device and a terminal device, or can be carried out within a device, for example, sending or receiving between components, modules, chips, software modules or hardware modules within the device through a bus, a line or an interface.

[0176] (3) In various embodiments of the present application, "beam," "SSB," and "SSB beam" may be used interchangeably. As an example, one beam corresponds to one SSB, and different beams correspond to different SSBs. Specifically, if one beam is used to transmit one SSB, then the beam may be considered to be the beam corresponding to the SSB, or in other words, the SSB may be the SSB corresponding to the beam. It will be understood that the embodiments of the present application are mainly described by taking one SSB corresponding to one beam as an example, and this is not a limitation. For example, one SSB may also correspond to multiple beams.

[0177] (4) In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0178] (5) In this application, the terms "first" and "second" are used for convenience of description only and are not intended to limit the scope of the embodiments of this application. They are not used to describe the order or precedence of features. It should be understood that the terms described in this manner may be interchangeable, where appropriate, to describe solutions other than the embodiments of this application.

[0179] The method provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings. The embodiment provided by the present application can be applied to the communication system shown in FIG1 above without limitation.

[0180] In the following embodiments, terminal devices and network devices are used as examples for illustrative description. The terminal device can also be replaced by a component of the terminal device (such as a chip or a chip system or circuit). The network device can also be replaced by a component of the network device (such as a chip or a chip system or circuit).

[0181] Referring to Figure 5, Figure 5 is a schematic diagram of a communication method 500 provided in one embodiment of the present application. The method 500 shown in Figure 5 may include the following steps.

[0182] 510. The network device determines scheduling information of N PDSCHs, where the N PDSCHs include system information corresponding to N SSBs or N beams, and the system information corresponding to the N SSBs or N beams is system information sent within the same time window. The scheduling information of each PDSCH in the N PDSCHs is the same, and N is an integer greater than 1.

[0183] Taking N SSBs as an example, N PDSCHs include system information corresponding to N SSBs, indicating that each PDSCH includes system information corresponding to one SSB. For example, N=3. To distinguish them, the three PDSCHs are referred to as PDSCH#1, PDSCH#2, and PDSCH#3. PDSCH#1 includes system information corresponding to SSB#1, PDSCH#2 includes system information corresponding to SSB#2, and PDSCH#3 includes system information corresponding to SSB#3. The indexes of SSB#1, SSB#2, and SSB#3 are different.

[0184] The system information may include various SIBs, such as SIB1.

[0185] As an example, the length of the time window is any of the following: 5 ms, 10 ms, 20 ms, 40 ms, 80 ms, 160 ms, 320 ms, and 640 ms. The specific length of the time window is not limited.

[0186] Optionally, the scheduling information (or configuration information) of PDSCH includes at least one of the following information: modulation coding scheme (MCS), time domain resource allocation (TDRA), frequency domain resource allocation (FDRA), redundancy version (RV), new data indicator (NDI), resource mapping mode, and DMRS symbol position.

[0187] In one example, the scheduling information of the PDSCH includes the MCS. Based on this, the MCS of each of the N PDSCHs is the same.

[0188] In another example, the scheduling information of the PDSCH includes TDRA. Based on this, the TDRA of each PDSCH in the N PDSCHs is the same. As an example, the TDRA includes at least one of the following: starting position, ending position, time length, and offset position. Among them, the offset position can represent the offset position of the PDSCH relative to other signals (such as PDCCH, such as SSB). It can be understood that each item included in the TDRA can be considered as a relative time domain position.

[0189] For example, assuming that TDRA includes a starting position and a duration, N=2, for distinction, the two PDSCHs are referred to as PDSCH#1 and PDSCH#2. The TDRA of PDSCH#1 and PDSCH#2 are the same, indicating that the starting position and duration of PDSCH#1 in a time domain unit (such as a slot) are the same as the starting position and duration of PDSCH#2 in a time domain unit (such as a time slot); or indicating that the offset position and duration of PDSCH#1 relative to a certain signal (such as the PDCCH corresponding to PDSCH#1) are the same as the offset position and duration of PDSCH#2 relative to another signal (such as the PDCCH corresponding to PDSCH#2). For example, the starting position of PDSCH#1 in slot#1 is the 5th symbol, and the duration is 3 symbols; the starting position of PDSCH#2 in slot#2 is the 5th symbol, and the duration is 3 symbols.

[0190] When the TDRA includes at least two of the starting position, ending position, duration, and offset position, the TDRAs of the PDSCHs are the same, which can also be understood as the same at least one of the pieces of information in the TDRAs of the PDSCHs. Taking the above example, the TDRAs of PDSCH#1 and PDSCH#2 are the same, which can also mean that the starting positions of the TDRAs of PDSCH#1 and PDSCH#2 are the same, such as the fifth symbol.

[0191] In another example, the scheduling information of the PDSCH includes FDRA. Based on this, the FDRA of each PDSCH in the N PDSCHs is the same. As an example, the FDRA includes at least one of the following: starting position, ending position, and resource length. It can be understood that each item included in the FDRA can be considered as a relative frequency domain position (for example, an offset position relative to the PDCCH, or an offset position relative to the SSB). For details, please refer to the previous description of TDRA, which will not be repeated here.

[0192] Three examples are briefly listed above. It can be understood that the scheduling information of the PDSCH may include at least one of the items listed above.

[0193] 520. The network device sends N PDSCHs.

[0194] Accordingly, the terminal device receives N PDSCHs. It can be understood that the terminal device receives N PDSCHs, which does not limit the terminal device to receiving N PDSCHs. The terminal device receives N PDSCHs, which means that the terminal device can jointly receive (or jointly detect, or jointly monitor) the N PDSCHs. For example, the terminal device can receive at least one PDSCH among the N PDSCHs. As an example, the terminal device jointly receives N PDSCHs, including: the terminal device receives N PDSCHs in a combined manner according to the maximum ratio.

[0195] As an example, the N PDSCHs transmitted by the network device may be continuous (e.g., the corresponding SSB indices are continuous). Alternatively, the N PDSCHs transmitted by the network device may be non-continuous (e.g., the corresponding SSB indices are non-continuous). Alternatively, the N PDSCHs may be continuous (e.g., the corresponding SSB indices are continuous), and the network device may transmit only a portion of the N PDSCHs.

[0196] Based on the above technical solution, the scheduling information of each of the N PDSCHs is the same, so the terminal device can jointly receive the N PDSCHs. By jointly receiving the N PDSCHs, the transmission performance can be improved and the user experience can be enhanced.

[0197] Optionally, the scheduling information of the PDSCH includes two schemes:

[0198] In solution A, PDSCH scheduling information is scheduled by the PDCCH, that is, the PDCCH indicates the PDSCH scheduling information. Based on this solution, N PDSCHs can be indicated by M PDCCHs. If the scheduling information of N PDSCHs is the same, then the M PDCCHs carry the same information, where M is an integer greater than or equal to 1.

[0199] Solution B: PDSCH scheduling information is scheduled by other information other than PDCCH, that is, other information other than PDCCH indicates PDSCH scheduling information. Based on this solution, the network device does not need to send the PDCCH corresponding to the PDSCH.

[0200] The following describes these two solutions in combination with method 600 and method 1000 respectively.

[0201] First, scheme A is introduced with reference to FIG6 .

[0202] Referring to Figure 6, Figure 6 is a schematic diagram of a communication method 600 provided in another embodiment of the present application. The method 600 shown in Figure 6 may include the following steps.

[0203] 610. The network device sends N SSBs.

[0204] Wherein, N is an integer greater than 1.

[0205] As an example, N SSBs may correspond to N beams, that is, one SSB corresponds to one beam. In other words, one SSB may be transmitted via one beam. It is understood that the indexes of the N SSBs may be different.

[0206] It can be understood that the N SSBs sent by the network device may be continuous (for example, the corresponding SSB indexes are continuous). Alternatively, the N SSBs sent by the network device may be non-continuous (for example, the corresponding SSB indexes are discontinuous). Alternatively, the N SSBs may be continuous (for example, the corresponding SSB indexes are continuous), and the network device may only send some of the N SSBs.

[0207] 620. The network device sends M PDCCHs, where the M PDCCHs are used to schedule system information corresponding to N SSBs or N beams. The system information corresponding to the N SSBs or N beams is system information sent within the same time window, and the M PDCCHs carry the same information.

[0208] Accordingly, the terminal device receives M PDCCHs. It can be understood that the terminal device receiving M PDCCHs does not limit the terminal device to receiving M PDCCHs. The terminal device receiving M PDCCHs means that the terminal device can jointly receive (or jointly detect, or jointly monitor) the M PDCCHs. For example, the terminal device can receive at least one PDCCH among the M PDCCHs. As an example, the terminal device jointly receives M PDCCHs, including: the terminal device receives M PDCCHs in a combined manner according to the maximum ratio.

[0209] Wherein, M is an integer greater than 1 or equal to 1. As an example, M is less than N or equal to N.

[0210] For system information and time window, please refer to the relevant description in method 500, which will not be repeated here.

[0211] The candidate time position of PDCCH (system frame, subframe, time slot, or OFDM symbol) can be determined based on a preset relationship (for example, the relationship with SSB) and / or the indication information in the main system information. You can refer to the method corresponding to Figure 3 and will not repeat it here.

[0212] Among them, the system information can be carried in the PDSCH, that is, the system information corresponding to N SSBs or N beams is carried in N PDSCHs. Based on this, M PDCCHs are used to schedule the system information corresponding to N SSBs or N beams. It can also be understood that the M PDCCHs include scheduling information (or configuration information) for N PDSCHs, and the N PDSCHs include system information corresponding to N SSBs or N beams. The information carried by the M PDCCHs is the same, which can be understood as the scheduling information of the N PDSCHs is the same.

[0213] It can be understood that the PDCCH is used to indicate scheduling information of the PDSCH, or the PDCCH is scrambled by a system information radio network temporary identifier (SI-RNTI).

[0214] Optionally, the information carried by each of the M PDCCHs includes at least one of the following: MCS, TDRA, FDRA, RV, NDI, resource mapping mode, and DMRS symbol position. The at least one item of information corresponds to system information, i.e., information about the PDSCH carrying the system information. It will be understood that the positions indicated in the TDRA and FDRA are relative positions. For details, reference may be made to the relevant description in the previous method 500 and will not be repeated here.

[0215] The following introduces two solutions based on the value of M.

[0216] Scheme 1, M=1.

[0217] M = 1, that is, the system information corresponding to N SSBs (or N beams, or N SSB beams) corresponds to one PDCCH. Specifically, the system information is carried on the PDSCH, which is scheduled by the PDCCH. N SSBs correspond to N system information, and these N system information can be carried on N PDSCHs, which can be scheduled by one PDCCH.

[0218] Through this solution 1, the PDCCH content of system information corresponding to multiple SSBs is centralized, thereby improving transmission performance. Specifically, scheduling the PDCCH content of system information corresponding to multiple SSBs through a single PDCCH increases the code length, which can improve coding gain. In addition, scheduling the PDCCH content of system information corresponding to multiple SSBs through a single PDCCH reduces the cyclic redundancy check (CRC) overhead.

[0219] See Figure 7, which illustrates the transmission of SSBs and system information for Scheme 1. To distinguish them, the N beams are referred to as Beam #0, Beam #1, ..., Beam #N-1, and the N SSBs are referred to as SSB #0, SSB #1, ..., SSB #N-1. As shown in Figure 7, the system information corresponding to the N SSBs is carried on N PDSCHs, which are scheduled by a single PDCCH.

[0220] Option 2, M>1.

[0221] M>1, that is, the system information corresponding to N SSBs (or N beams, or N SSB beams) corresponds to at least two PDCCHs, and the information carried by the at least two PDCCHs is the same. Specifically, the system information is carried in the PDSCH, and the PDSCH is scheduled by the PDCCH. N SSBs correspond to N system information, and the N system information can be carried in N PDSCHs, and the N PDSCHs can be scheduled by M PDCCHs, and the information carried by each PDCCH in the M PDCCHs is the same.

[0222] Through this solution 2, the M PDCCHs carry the same information, so the receiving end (i.e., the terminal device) can jointly receive the PDCCHs corresponding to the system information of multiple different SSBs (or beams), thereby improving the receiving performance.

[0223] See Figure 8, which illustrates the transmission of SSBs and system information for Scheme 2. To distinguish them, the N beams are referred to as Beam #0, Beam #1, ..., Beam #N-1, and the N SSBs are referred to as SSB #0, SSB #1, ..., SSB #N-1. As shown in Figure 8, the system information corresponding to the N SSBs is carried on N PDSCHs, which are scheduled by M PDCCHs. In the example shown in Figure 8, M = N.

[0224] Refer to Figure 9, which is another schematic diagram of SSB and system information transmission applicable to Scheme 2. For distinction, the N beams are respectively referred to as: Beam #0, Beam #1, ..., Beam #N-1, and the N SSBs are respectively referred to as: SSB #0, SSB #1, ..., SSB #N-1. As shown in Figure 9, the system information corresponding to the N SSBs is carried in N PDSCHs, and the N PDSCHs are scheduled by M PDCCHs. In the example shown in Figure 9, M is less than N, that is, among the system information corresponding to the N beams, the system information corresponding to at least 2 SSBs corresponds to one PDCCH. In the example shown in Figure 9, as an example, the system information corresponding to SSB #0 and SSB #1 corresponds to one PDCCH.

[0225] Optionally, method 600 further includes: the network device sending indication information #1 (i.e., an example of first indication information) to the terminal device, where the indication information #1 indicates a value of N. In this manner, the terminal device can determine the value of N based on the indication of the network device, thereby facilitating the terminal device to learn how to jointly receive several SSBs.

[0226] In a first possible implementation, the indication information #1 is SSB. Based on this implementation, the value of N can be indicated by SSB.

[0227] For example, indication information #1 is PBCH in SSB. For example, the value of N can be carried in the CORESET configuration information in PBCH.

[0228] For another example, indication information #1 is the MIB in the SSB.

[0229] In a second possible implementation, indication information #1 is DMRS. Based on this implementation, the DMRS can be used to indicate the value of N, which facilitates the terminal device to perform combined detection of N SSBs. Furthermore, since DMRS detection is highly reliable and has relatively low complexity, it can improve the detection performance of the terminal device.

[0230] For example, indication information #1 is the DMRS corresponding to the SSB. For ease of description, the DMRS used to demodulate the SSB (or, the DMRS in the SSB) may be referred to as the DMRS corresponding to the SSB.

[0231] For another example, indication information #1 is the DMRS corresponding to the PDCCH. For ease of description, the DMRS used for demodulating the PDCCH (or the DMRS in the PDCCH) may be referred to as the DMRS corresponding to the PDCCH.

[0232] For another example, indication information #1 is the DMRS corresponding to the PDSCH. For ease of description, the DMRS used for demodulating the PDSCH (or the DMRS in the PDSCH) may be referred to as the DMRS corresponding to the PDSCH.

[0233] The following describes an implementation method in which indication information #1 is DMRS (such as DMRS corresponding to SSB, DMRS corresponding to PDCCH, and DMRS corresponding to PDSCH).

[0234] For example, different DMRS sequences correspond to different values ​​of N, meaning that the value of N can be indicated by the DMRS sequence. Specifically, the DMRS sequence and the value of N have a corresponding relationship (for distinction, this corresponding relationship is referred to as correspondence relationship #1). The terminal device can determine the value of N based on the DMRS sequence and correspondence relationship #1.

[0235] As an example, the correspondence #1 may exist in the form of a table, a function, a text, or a string, such as for storage or transmission. Table 1 below is an example of presenting the correspondence #1 in table form.

[0236] Table 1

[0237] Taking Table 1 as an example, indication information #1 is a DMRS sequence. If the DMRS sequence is DMRS sequence #1, the value of N indicated by indication information #1 is N1; if the DMRS sequence is DMRS sequence #2, the value of N indicated by indication information #1 is N2; if the DMRS sequence is DMRS sequence #3, the value of N indicated by indication information #1 is N3.

[0238] It should be understood that Table 1 is provided for illustrative purposes only and is not intended to be limiting. Any variations of Table 1 are applicable to the embodiments of the present application. For example, the DMRS sequence in Table 1 may be replaced with a DMRS sequence index, that is, a correspondence between an index (or identifier) ​​capable of identifying a DMRS sequence and a value of N. For another example, Table 1 may include a greater or lesser number of N values ​​and DMRS sequences.

[0239] Optionally, the value of N is one of 2, 4, 6, and 8. It will be understood that this is an exemplary description and is not limited to this. For example, the value of N may also be other values. For example, N is the number of SSBs actually transmitted, that is, the information carried by the PDCCH of the system information corresponding to all SSBs of the cell is the same. In other words, the terminal device can jointly receive the PDCCH of the system information corresponding to all SSBs of the cell.

[0240] The indexes of the N SSBs are different, and regarding the N SSBs, the following implementation methods can be included.

[0241] In a first possible implementation, N SSBs are temporally adjacent. This approach can reduce the impact of channel time variability on performance, making it easier for terminal devices to jointly receive the PDCCHs of system information corresponding to multiple SSBs.

[0242] Among them, the N SSBs are adjacent in time, which means that the time domain resources occupied by two adjacent SSBs among the N SSBs are adjacent.

[0243] For example, assuming N=4, the N SSBs are in the order of time domain resources: SSB#0, SSB#1, SSB#2, SSB#3. The N SSBs are adjacent in time, which can be expressed as: SSB#0, SSB#1, SSB#2, SSB#3 occupy four consecutive time domain units.

[0244] The second possible implementation is to have the N SSBs indexed adjacently. This approach can reduce the impact of channel time variability on performance, making it easier for terminal devices to jointly receive the PDCCH of system information corresponding to multiple SSBs.

[0245] Among them, the indexes of the N SSBs are adjacent, which means that the indexes of two adjacent SSBs in the N SSBs are adjacent, that is, the N SSBs are adjacent or continuous N SSBs.

[0246] In a third possible implementation, the N SSBs are spaced evenly in time, which helps to shorten the average access time.

[0247] Among them, the N SSBs are evenly spaced in time, which means that the time domain resource intervals occupied by two adjacent SSBs in the N SSBs are the same.

[0248] For example, assuming N=4, the N SSBs are in the order of time domain resources: SSB#0, SSB#1, SSB#2, SSB#3, and the N SSBs are evenly spaced in time, which means that the time interval between SSB#0 and SSB#1, the time interval between SSB#1 and SSB#2, and the time interval between SSB#2 and SSB#3 are the same.

[0249] A fourth possible implementation is to evenly space the indexes of the N SSBs, which helps shorten the average access time.

[0250] Among them, the indexes of the N SSBs are evenly spaced, which means that the interval (or difference) between the indexes of two adjacent SSBs in the N SSBs is the same.

[0251] For example, assuming N=4, the N SSBs are in ascending order of index: SSB#0, SSB#1, SSB#2, SSB#3, and the indexes of the N SSBs are evenly spaced, which means that the interval between the index of SSB#0 and the index of SSB#1, the interval between the index of SSB#1 and the index of SSB#2, and the interval between the index of SSB#2 and the index of SSB#3 are the same.

[0252] As mentioned above, the terminal device can jointly receive M PDCCHs. The following introduces several possible implementation methods for the terminal device to determine to jointly receive M PDCCHs.

[0253] In a first possible implementation, the network device sends indication information #2 (i.e., an example of the second indication information) to the terminal device, where indication information #2 indicates whether the information carried by the M PDCCHs is the same, or indication information #2 indicates whether the M PDCCHs are jointly received.

[0254] Among them, if the indication information #2 indicates whether the information carried by the M PDCCHs is the same, after the terminal device receives the indication information #2, if the indication information #2 indicates that the information carried by the M PDCCHs is the same, the terminal device jointly receives the M PDCCHs; if the indication information #2 indicates that the information carried by the M PDCCHs is different, the terminal device does not jointly receive the M PDCCHs.

[0255] Among them, "whether to jointly receive M PDCCHs" can also be replaced by any of the following items: "whether to support joint reception of M PDCCHs", "whether to support multi-beam joint detection", "whether to support multi-beam joint reception", "whether to support joint reception of PDSCH", "whether to support multi-beam joint transmission", "whether to support combined detection", etc.

[0256] It is understood that the specific content indicated by indication information #2 is not limited in the embodiments of the present application. As long as a solution that enables a terminal device to determine whether to jointly receive M PDCCHs based on indication information #2 is applicable to the embodiments of the present application. The following mainly uses indication information #2 indicating whether to jointly receive M PDCCHs as an example to illustrate.

[0257] In one example, the indication information #2 is SSB. Based on this implementation, the SSB can be used to indicate whether to jointly receive M PDCCHs.

[0258] For example, indication information #2 is PBCH in SSB.

[0259] For another example, indication information #2 is the MIB in the SSB.

[0260] In another example, indication information #2 is DMRS. Based on this implementation, DMRS can be used to indicate whether to jointly receive M PDCCHs, which facilitates the terminal device's determination of whether to jointly receive N SSBs. Furthermore, because DMRS detection offers high reliability and low complexity, it can improve terminal device detection performance.

[0261] For example, indication information #2 is the DMRS corresponding to the PDCCH.

[0262] For another example, indication information #2 is the DMRS corresponding to the SSB.

[0263] The following describes an implementation method in which indication information #2 is DMRS (such as DMRS corresponding to SSB, and such as DMRS corresponding to PDSCH).

[0264] For example, the DMRS sequence has a corresponding relationship with whether to jointly receive M PDCCHs (for distinction, this corresponding relationship is called corresponding relationship #2). The terminal device can know whether to jointly receive M PDCCHs based on the DMRS sequence and corresponding relationship #2.

[0265] As an example, correspondence #2 may exist in the form of a table, function, text, or string, such as for storage or transmission. Table 2 below is an example of presenting correspondence #2 in table form.

[0266] Table 2

[0267] Taking Table 2 as an example, indication information #2 is the DMRS sequence. If the DMRS sequence is DMRS sequence #1, it means that indication information #2 indicates not to jointly receive M PDCCHs; if the DMRS sequence is DMRS sequence #2 or DMRS sequence #3, it means that indication information #2 indicates to jointly receive M PDCCHs.

[0268] It should be understood that Table 2 is provided for illustrative purposes only and is not intended to be limiting. Any variations of Table 2 are applicable to the embodiments of the present application. For example, the DMRS sequences in Table 2 may be replaced with DMRS sequence indices. For another example, Table 2 may include a greater or lesser number of DMRS sequences.

[0269] In another example, indication information #2 is implemented using at least one bit. For example, assume that one bit indicates whether M PDCCHs are jointly received. If this bit is set to "1," it indicates that M PDCCHs are jointly received; if this bit is set to "0," it indicates that M PDCCHs are not jointly received. It should be understood that the above is merely an example and is not limiting.

[0270] In a second possible implementation manner, the terminal device determines by itself whether to jointly receive M PDCCHs.

[0271] As an example, the terminal device may attempt to jointly receive M PDCCHs, thereby identifying whether to jointly receive the M PDCCHs.

[0272] For example, if a terminal device successfully receives M PDCCHs jointly within a preset duration, it is determined that the joint reception of the M PDCCHs is possible; if the reception fails within the preset duration, it is determined that the joint reception of the M PDCCHs is not possible, and the joint reception can be stopped. The preset duration can be pre-configured, pre-defined by a protocol, or pre-agreed between the network device and the terminal device, and is not limited thereto.

[0273] For another example, if a terminal device performs joint reception of M PDCCHs and the number of joint receptions exceeds a preset number but still fails, it is determined that joint reception of the M PDCCHs is not possible, and the joint reception may be stopped. The preset number of times may be pre-configured, pre-defined by a protocol, or pre-agreed between the network device and the terminal device, and is not limited thereto.

[0274] For another example, the terminal device can determine whether to perform joint reception of multiple PDCCHs based on the quality of the PDCCH received signal. For example, when the quality of the PDCCH received signal is lower than a preset threshold value, the terminal device attempts to perform combined detection (for example, joint equalization, then demodulation and decoding) on ​​multiple PDCCHs. The preset threshold value can be pre-configured, pre-defined by the protocol, or pre-agreed by the network device and the terminal device, and is not limited to this.

[0275] Optionally, at least one of the following information corresponding to the M PDCCHs is the same: frequency domain resource position, mapped resource position, number of mapped resources (or aggregation level, or number of REGs (Resource Element Group)), time domain resource position (position in time slot).

[0276] The following describes related solutions for redundant versions of N PDSCHs.

[0277] In a first possible implementation, N SSBs correspond to N PDSCHs, and the redundant version index of each PDSCH is related to its corresponding SSB index and / or N.

[0278] In one example, the redundancy version index of each PDSCH is related to its corresponding SSB index. Thus, since different SSBs have different indexes, the redundancy version indexes of each PDSCH are different. Having different redundancy version indexes for each PDSCH can improve the benefits of joint reception.

[0279] Assuming that the redundant version index of the PDSCH is denoted as RV, then RV satisfies: RV=f(SSB index), where f represents a function.

[0280] For example, the redundancy version RV of the PDSCH corresponding to the nth SSB is: n mod x. Here, mod represents the modulo function, n is the SSB index, and x is a constant. As an example, the value of x is an even number, such as any of the following: 2, 4, 6, 8, or 10.

[0281] In another example, the redundancy version index of each PDSCH is related to N.

[0282] Assuming that the redundancy version index of the PDSCH is denoted as RV, then RV satisfies: RV=f(N), where f represents a function. In this case, since the value of N is fixed, the redundancy versions of each PDSCH are the same.

[0283] In another example, the redundancy version index of each PDSCH is related to its corresponding SSB index and N.

[0284] Assuming that the redundant version index of the PDSCH is denoted as RV, then RV satisfies: RV=f(SSB index, N), where f represents a function.

[0285] For example, the redundancy version RV of the PDSCH corresponding to the nth SSB is: n mod N, where n is the SSB index.

[0286] The second possible implementation is to have N SSBs correspond to N PDSCHs, with each PDSCH using the same redundancy version. In this case, each PDSCH uses the same redundancy version, and the scheduling information for each PDSCH is identical. This allows for simpler and more efficient joint reception. For example, maximum ratio combining can be used to achieve joint reception of PDSCHs across multiple SSBs, improving transmit diversity gain and performance.

[0287] The above introduces the relevant plans of Plan A, and the following introduces Plan B.

[0288] Referring to Figure 10, Figure 10 is a schematic diagram of a communication method 1000 provided in another embodiment of the present application. The method 1000 shown in Figure 10 may include the following steps.

[0289] 1010. The network device sends at least one indication information #3, where the at least one indication information #3 indicates scheduling information of N PDSCHs, where the N PDSCHs include system information corresponding to N SSBs or N beams, and the system information corresponding to the N SSBs or N beams is system information sent within the same time window.

[0290] Wherein, N is an integer greater than 1.

[0291] Among them, indication information #3 is information other than PDCCH.

[0292] Regarding the scheduling information of PDSCH, please refer to the description in method 500, which will not be repeated here.

[0293] Optionally, the scheduling information of the N PDSCHs is the same. Based on this, the terminal device can jointly receive the N PDSCHs, thereby improving reception performance. For details about this solution, please refer to the relevant description in method 500.

[0294] 1020. The network device sends N PDSCHs.

[0295] Accordingly, the terminal device receives N PDSCHs. It can be understood that the terminal device receives N PDSCHs, which does not limit the terminal device to receiving N PDSCHs. The terminal device receives N PDSCHs, which means that the terminal device can jointly receive (or jointly detect, or jointly monitor) the N PDSCHs. For example, the terminal device can receive at least one PDSCH among the N PDSCHs. As an example, the terminal device jointly receives N PDSCHs, including: the terminal device receives N PDSCHs in a combined manner according to the maximum ratio.

[0296] Based on this solution, system information can be transmitted without PDCCH. That is, PDSCH scheduling information can be scheduled by other information other than PDCCH, without the need for PDCCH scheduling. As a result, network devices do not need to send PDCCH. In this way, the resources originally used to transmit PDCCH can now be used to transmit PDSCH, thereby improving coverage.

[0297] See Figure 11, which is a schematic diagram of SSB and system information transmission without PDCCH transmission applicable to an embodiment of the present application. To distinguish, the N beams are referred to as Beam #0, Beam #1, ..., Beam #N-1, and the N SSBs are referred to as SSB #0, SSB #1, ..., SSB #N-1. As shown in Figure 11, the system information corresponding to the N beams is carried on N PDSCHs. During this process, no PDCCH is transmitted.

[0298] The following describes the relevant solutions for indication information #3.

[0299] Solution 1, in step 1010, the network device sends at least one indication information #3, including: the network device sends one indication information #3. The indication information #3 indicates scheduling information of N PDSCHs.

[0300] Solution 2: In step 1010, the network device sends at least one indication information #3, including: the network device sends N indication information #3. The N indication information #3 indicate scheduling information of N PDSCHs, that is, one indication information #3 indicates scheduling information of one PDSCH.

[0301] Optionally, the indication information #3 is SSB and / or DMRS. For ease of explanation, the following mainly takes Solution 2 as an example to introduce several implementation methods.

[0302] In a first possible implementation, the indication information #3 is SSB. Based on this implementation, the scheduling information of the PDSCH can be indicated by SSB.

[0303] For example, indication information #3 is PBCH in SSB.

[0304] For another example, indication information #3 is the MIB in the SSB.

[0305] In a second possible implementation, the indication information #3 is DMRS. Based on this implementation, since DMRS detection has high reliability and low complexity, the detection performance of the terminal device can be improved.

[0306] For example, indication information #3 is the DMRS corresponding to the PDSCH.

[0307] In a third possible implementation, indication information #3 is SSB and DMRS. Based on this implementation, the PDSCH scheduling information can be jointly indicated by SSB and DMRS, that is, part of the PDSCH scheduling information is indicated by SSB, and part of the scheduling information is indicated by DMRS.

[0308] For example, indication information #3 PBCH and DMRS corresponding to PDSCH, that is, the scheduling information of PDSCH is divided into two parts, one part of the scheduling information is carried in PBCH, and the other part of the scheduling information is carried in the DMRS corresponding to PDSCH.

[0309] Optionally, the scheduling information of the PDSCH includes an MCS, and the MCS of the PDSCH is indicated by at least one bit. For example, assuming there are 4 candidate MCSs, the MCS of the PDSCH is indicated by 2 bits. For example, the 4 candidate MCSs are 0, 1, 2, and 3.

[0310] For example, assume there are four candidate MCSs, which are denoted as MCS#0, MCS#1, MCS#2, and MCS#3 for distinction. Two bits are used to indicate the MCS of the PDSCH. For example, if the two bits are set to "00," it indicates that the MCS of the PDSCH is MCS#0; if the two bits are set to "01," it indicates that the MCS of the PDSCH is MCS#1; if the two bits are set to "10," it indicates that the MCS of the PDSCH is MCS#2; and if the two bits are set to "11," it indicates that the MCS of the PDSCH is MCS#3.

[0311] Optionally, the scheduling information of the PDSCH includes frequency domain resource allocation, and the frequency domain resource allocation of the PDSCH is associated with the position of the SSB.

[0312] In a first possible implementation, the starting position of the frequency domain resources of the PDSCH is the same as the starting position of the frequency domain resources of the SSB. Based on this, the terminal device can obtain the starting position of the frequency domain resources of the PDSCH according to the starting position of the frequency domain resources of the SSB.

[0313] In a second possible implementation, the end position of the PDSCH frequency domain resources is associated with the start position of the SSB frequency domain resources and the scheduling bandwidth information indicated in the SSB (such as the MIB or PBCH). Based on this, the terminal device can obtain the start position of the PDSCH frequency domain resources based on the start position of the SSB frequency domain resources and the scheduling bandwidth information indicated in the SSB.

[0314] As mentioned above, in method 1100, the network device does not need to send the PDCCH corresponding to the PDSCH. For the terminal device, it can be learned whether the network device sends the PDCCH in any of the following ways.

[0315] In a possible implementation, the network device sends indication information #4 to the terminal device, where the indication information #4 indicates whether a PDCCH is sent.

[0316] In one example, indication information #4 is SSB. Based on this implementation, SSB can be used to indicate whether PDCCH is sent.

[0317] For example, indication information #4 is PBCH in SSB.

[0318] For another example, indication information #4 is the MIB in the SSB.

[0319] In another example, the indication information #4 is DMRS. Based on this implementation, since DMRS detection has high reliability and low complexity, the detection performance of the terminal device can be improved.

[0320] For example, indication information #4 is the DMRS corresponding to the SSB.

[0321] For another example, indication information #4 is the DMRS corresponding to the PDSCH.

[0322] The following describes an implementation method in which indication information #4 is DMRS (such as DMRS corresponding to SSB, and such as DMRS corresponding to PDSCH).

[0323] For example, there is a correspondence between the DMRS sequence and whether PDCCH is sent (for distinction, this correspondence is referred to as correspondence #3). The terminal device can know whether PDCCH is sent based on the DMRS sequence and correspondence #3.

[0324] As an example, correspondence #3 may exist in the form of a table, function, text, or string, such as for storage or transmission. Table 3 below is an example of presenting correspondence #3 in table form.

[0325] Table 3

[0326] Taking Table 3 as an example, indication information #4 is the DMRS sequence. If the DMRS sequence is DMRS sequence #1, it means that indication information #4 indicates that PDCCH is sent; if the DMRS sequence is DMRS sequence #2 or DMRS sequence #3, it means that indication information #4 indicates that no PDCCH is sent.

[0327] It should be understood that Table 3 is provided for illustrative purposes only and is not intended to be limiting. Any variations of Table 3 are applicable to the embodiments of the present application. For example, the DMRS sequences in Table 3 may be replaced with DMRS sequence indices. For another example, Table 3 may include a greater or lesser number of DMRS sequences.

[0328] In another example, indication information #4 is implemented using at least one bit. For example, assume that a single bit indicates whether a PDCCH is being transmitted. If this bit is set to "1," it indicates that a PDCCH is being transmitted; if this bit is set to "0," it indicates that no PDCCH is being transmitted. It should be understood that the above is merely an example and not limiting.

[0329] It is understood that the above-mentioned indication of whether a PDCCH is transmitted through indication information #4 is for illustrative purposes only and is not intended to limit the present invention. For example, a terminal device may also detect whether a PDCCH is transmitted on its own. For example, if the terminal device does not detect a PDCCH within a preset time period, it is assumed that no PDCCH is transmitted. For another example, if the terminal device receives indication information #3, it is assumed that no PDCCH is transmitted.

[0330] Optionally, the method 1000 further includes: the network device sends indication information #1 to the terminal device, where the indication information #1 indicates a value of N. For this solution, reference may be made to the relevant description in the method 600 and will not be repeated here.

[0331] The indexes of the N SSBs are different, and regarding the N SSBs, the following implementation methods can be included.

[0332] In a first possible implementation, N SSBs are adjacent in time.

[0333] In a second possible implementation, the indexes of the N SSBs are adjacent.

[0334] In a third possible implementation, the N SSBs are evenly spaced in time.

[0335] In a fourth possible implementation, the indexes of the N SSBs are evenly spaced.

[0336] For the above four possible implementation methods, please refer to the relevant description in method 600, which will not be repeated here.

[0337] Optionally, the redundancy version index of each PDSCH is related to its corresponding SSB index and / or N, or the redundancy version of each PDSCH is the same. This solution can be referred to the relevant description in method 600 and will not be described in detail here.

[0338] For ease of understanding, a specific process is described below using SSB as an example. For details not described below, reference can be made to the descriptions of methods 500, 600, and 1000, and will not be repeated here.

[0339] Referring to Figure 12, Figure 12 is a schematic flow chart of a communication method 1200 provided according to an embodiment of the present application. The method 1200 shown in Figure 12 may include the following steps.

[0340] 1210. The network device sends N SSBs to the terminal device.

[0341] Wherein, N is an integer greater than 1.

[0342] The network device sends system information corresponding to N SSBs to the terminal device.

[0343] One possible implementation method is that the network device sends system information corresponding to N SSBs (such as SIB1) to the terminal device, which is implemented through the solution of method 600. At this time, method 1200 also includes steps 1220 and 1230.

[0344] Another possible implementation method is that the network device sends system information corresponding to N SSBs (such as SIB1) to the terminal device, which is implemented through the scheme of method 1000. At this time, method 1200 includes step 1230, that is, step 1220 is not included.

[0345] 1220. The network device sends M PDCCHs to the terminal device.

[0346] Among them, M PDCCHs are used to schedule the system information corresponding to N SSBs, and the information carried by the M PDCCHs is the same. Specifically, the system information is carried in the PDSCH, and the PDSCH is scheduled by the PDCCH. N SSBs correspond to N system information, and the N system information can be carried in N PDSCHs, and the N PDSCHs can be scheduled by M PDCCHs.

[0347] 1230. The network device sends N PDSCHs to the terminal device, where the N PDSCHs include system information corresponding to N SSBs.

[0348] Accordingly, the terminal device jointly receives N PDSCHs, and thereby obtains at least one piece of system information.

[0349] Specifically, if method 1200 includes step 1220 and step 1230, the terminal device can determine scheduling information of N PDSCHs based on M PDCCHs, and then jointly receive N PDSCHs based on the determined scheduling information of the N PDSCHs.

[0350] Specifically, if method 1200 includes step 1230 but does not include step 1220, the terminal device may determine scheduling information for N PDSCHs based on indication information #3, and further, based on the determined scheduling information for the N PDSCHs, jointly receive the N PDSCHs. As an example, indication information #3 is SSB and / or DMRS. For details, please refer to the relevant description in method 1000.

[0351] 1240. The terminal device transmits signals with the network device based on the at least one system information.

[0352] Signal transmission between terminal devices and network devices. For example, completing the initial access process so that the UE can access the network normally, or completing cell handover, or completing beam management, etc.

[0353] It can be understood that in each embodiment of the present application, the interaction between the terminal device and the network device is mainly used as an example for illustrative explanation. The present application is not limited to this. The terminal device can be replaced by a receiving device, and the receiving device can be a terminal device or a network device; the network device can be replaced by a sending device, and the sending device can be a terminal device or a network device.

[0354] It is also understood that in some of the above embodiments, it is mentioned that the terminal device receives N PDSCHs. As mentioned above, this does not limit the terminal device to receiving N PDSCHs. It means that the terminal device jointly receives N PDSCHs, or in other words, the terminal device can jointly receive N PDSCHs. In addition, the method for the terminal device to determine whether to jointly receive N PDSCHs is not limited.

[0355] For example, the terminal device may be able to jointly receive N PDSCHs by default.

[0356] For another example, the terminal device may jointly receive N PDSCHs based on an instruction from the network device. For example, the network device sends instruction information #5 to the terminal device, where the instruction information #5 indicates whether the terminal device may jointly receive N PDSCHs.

[0357] As an example, the indication information #5 may be the indication information #2 mentioned above. For details, please refer to the above description.

[0358] As another example, the indication information #5 may be the indication information #4 described above. If indication information #4 indicates that no PDCCH is sent, the terminal device can receive N PDSCHs jointly by default; if indication information #4 indicates that PDCCH is sent, the terminal device does not receive N PDSCHs jointly by default. If indication information #4 indicates that no PDCCH is sent, the terminal device does not receive N PDSCHs jointly by default; if indication information #4 indicates that PDCCH is sent, the terminal device can receive N PDSCHs jointly by default.

[0359] In another example, indication information #5 is implemented using at least one bit. For example, assume that one bit indicates whether N PDSCHs can be jointly received. If this bit is set to "1," it indicates that N PDSCHs are jointly received; if this bit is set to "0," it indicates that N PDSCHs are not jointly received. It should be understood that the above is merely an example and is not limiting.

[0360] It can also be understood that some optional features in the various embodiments of the present application may not depend on other features in certain scenarios, and may also be combined with other features in certain scenarios, without limitation.

[0361] It can also be understood that the solutions in the various embodiments of the present application can be reasonably combined and used, and the explanations or descriptions of the various terms appearing in the embodiments can be referenced or explained with each other in the various embodiments, without limitation to this.

[0362] It can also be understood that in the above-mentioned method embodiments, the methods and operations implemented by the terminal device can also be implemented by components that can be formed by the terminal device (such as chips or circuits); in addition, the methods and operations implemented by the network device can also be implemented by components that can be formed by the network device (such as chips or circuits), without limitation.

[0363] The method provided in the embodiment of the present application is described in detail above in conjunction with Figures 5 to 12. Below, the apparatus provided in the embodiment of the present application is described in detail in conjunction with Figures 13 to 15. It should be understood that the description of the apparatus embodiment corresponds to the description of the method embodiment. Therefore, for matters not described in detail, please refer to the method embodiment above. For the sake of brevity, they are not repeated here.

[0364] Referring to Figure 13, Figure 13 is a schematic diagram of a communication device 1300 provided in an embodiment of the present application. Device 1300 includes a transceiver unit 1310. Transceiver unit 1310 can be used to implement corresponding communication functions. Transceiver unit 1310 can also be referred to as a communication interface or a communication unit. Optionally, device 1300 also includes a processing unit 1320. Processing unit 1320 can be used to perform processing, such as determining a resource pattern.

[0365] Optionally, the device 1300 may further include a storage unit, which may be used to store instructions and / or data. The processing unit 1320 may read the instructions and / or data in the storage unit so that the device implements the aforementioned method embodiment.

[0366] In a first possible design, the apparatus 1300 may be a network device in the aforementioned embodiment (such as the network device in FIG. 5 , the network device in FIG. 6 , the network device in FIG. 10 , and the network device in FIG. 12 ), and the apparatus 1300 may implement the steps or processes corresponding to those performed by the network device in the above method embodiment. The transceiver unit 1310 may be used to perform transceiver-related operations (such as operations of sending and / or receiving data or messages) of the network device in the above method embodiment, and the processing unit 1320 may be used to perform processing-related operations of the network device in the above method embodiment, or operations other than transceiver operations (such as operations other than sending and / or receiving data or messages).

[0367] In one possible implementation, the transceiver unit 1310 is configured to send N synchronization signals, where N is an integer greater than 1. The transceiver unit 1310 is further configured to send M physical downlink control channels (PDCCHs), where the M PDCCHs are used to schedule the N synchronization signals or system information corresponding to the N beams, where the N synchronization signals or the system information corresponding to the N beams are system information sent within the same time window, and the M PDCCHs carry the same information, where M is an integer greater than or equal to 1. Optionally, the processing unit 1320 is configured to determine the M PDCCHs.

[0368] Optionally, the information carried by each of the M PDCCHs includes at least one of the following: modulation and coding scheme, time domain resource allocation, frequency domain resource allocation, redundancy version, new data indication, resource mapping mode, and demodulation reference signal symbol position.

[0369] Optionally, the transceiver unit 1310 is further used to send N PDSCHs, where the N PDSCHs include N synchronization signals or system information corresponding to N beams.

[0370] Optionally, the N PDSCHs include a first PDSCH, and the index of the redundant version of the first PDSCH is associated with at least one of the following: the index of the first PDSCH, the index of the beam corresponding to the first PDSCH, the index of the synchronization signal corresponding to the first PDSCH, and the value of N.

[0371] Optionally, the redundancy version of each PDSCH in the N PDSCHs is the same.

[0372] Optionally, the transceiver unit 1310 is further configured to send first indication information, where the first indication information indicates a value of N.

[0373] Optionally, the first indication information is any one of: a synchronization signal, a demodulation reference signal corresponding to the PDCCH, a demodulation reference signal corresponding to the PDSCH, or a demodulation reference signal corresponding to the synchronization signal.

[0374] Optionally, the value of N is any of the following: 2, 4, 6, or 8.

[0375] Optionally, the transceiver unit 1310 is further configured to send second indication information, where the second indication information indicates that the information carried by the M PDCCHs is the same, or the second indication information indicates joint reception of the M PDCCHs.

[0376] Optionally, the second indication information is any one of the following: a synchronization signal, a demodulation reference signal corresponding to the PDCCH, a demodulation reference signal corresponding to the PDSCH, or a demodulation reference signal corresponding to the synchronization signal.

[0377] Optionally, the N synchronization signals satisfy any one of the following: the time domain resources occupied by two adjacent synchronization signals among the N synchronization signals are adjacent; the interval between the time domain resources occupied by two adjacent synchronization signals among the N synchronization signals is the same; the indexes of two adjacent synchronization signals among the N synchronization signals are adjacent; or, the interval between the indexes of two adjacent synchronization signals among the N synchronization signals is the same.

[0378] In a second possible design, the apparatus 1300 may be a terminal device in the aforementioned embodiment (such as the terminal device in Figure 5, the terminal device in Figure 6, the terminal device in Figure 10, and the terminal device in Figure 12), and the apparatus 1300 may implement the steps or processes corresponding to those performed by the terminal device in the above method embodiment. The transceiver unit 1310 may be used to perform transceiver-related operations (such as operations of sending and / or receiving data or messages) of the terminal device in the above method embodiment, and the processing unit 1320 may be used to perform processing-related operations of the terminal device in the above method embodiment, or operations other than transceiver (such as operations other than sending and / or receiving data or messages).

[0379] In one possible implementation, the transceiver unit 1310 is configured to receive N synchronization signals, where N is an integer greater than 1. The transceiver unit 1310 is further configured to receive M physical downlink control channels (PDCCHs), where the M PDCCHs are used to schedule system information corresponding to the N synchronization signals or N beams, where the N synchronization signals or the system information corresponding to the N beams are system information sent within the same time window, and the M PDCCHs carry the same information, where M is an integer greater than or equal to 1. Optionally, the processing unit 1320 is configured to determine the M PDCCHs.

[0380] Optionally, the information carried by each of the M PDCCHs includes at least one of the following: modulation and coding scheme, time domain resource allocation, frequency domain resource allocation, redundancy version, new data indication, resource mapping mode, and demodulation reference signal symbol position.

[0381] Optionally, the transceiver unit 1310 is further used to receive N PDSCHs, where the N PDSCHs include N synchronization signals or system information corresponding to N beams.

[0382] Optionally, the N PDSCHs include a first PDSCH, and the index of the redundant version of the first PDSCH is associated with at least one of the following: the index of the first PDSCH, the index of the beam corresponding to the first PDSCH, the index of the synchronization signal corresponding to the first PDSCH, and the value of N.

[0383] Optionally, the redundancy version of each PDSCH in the N PDSCHs is the same.

[0384] Optionally, the transceiver unit 1310 is further configured to receive first indication information, where the first indication information indicates a value of N.

[0385] Optionally, the first indication information is any one of: a synchronization signal, a demodulation reference signal corresponding to the PDCCH, a demodulation reference signal corresponding to the PDSCH, or a demodulation reference signal corresponding to the synchronization signal.

[0386] Optionally, the value of N is any of the following: 2, 4, 6, or 8.

[0387] Optionally, the transceiver unit 1310 is further configured to receive second indication information, where the second indication information indicates that the information carried by the M PDCCHs is the same, or the second indication information indicates joint reception of the M PDCCHs.

[0388] Optionally, the processing unit 1320 is configured to determine joint reception of M PDCCHs.

[0389] Optionally, the second indication information is any one of the following: a synchronization signal, a demodulation reference signal corresponding to the PDCCH, a demodulation reference signal corresponding to the PDSCH, or a demodulation reference signal corresponding to the synchronization signal.

[0390] Optionally, the N synchronization signals satisfy any one of the following: the time domain resources occupied by two adjacent synchronization signals among the N synchronization signals are adjacent; the interval between the time domain resources occupied by two adjacent synchronization signals among the N synchronization signals is the same; the indexes of two adjacent synchronization signals among the N synchronization signals are adjacent; or, the interval between the indexes of two adjacent synchronization signals among the N synchronization signals is the same.

[0391] It should be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0392] It should also be understood that the device 1300 here is embodied in the form of a functional unit. The term "unit" here can refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combined logic circuit and / or other suitable components that support the described functions. In an optional example, those skilled in the art will understand that the device 1300 can be specifically the communication device in the above-mentioned embodiment, and can be used to execute the various processes and / or steps corresponding to the communication device in the above-mentioned method embodiments. To avoid repetition, they will not be described here.

[0393] The apparatus 1300 of each of the above-described solutions has the function of implementing the corresponding steps performed by the communication device in the above-described method. The functions can be implemented by hardware, or by hardware executing corresponding software implementations. The hardware or software includes one or more modules corresponding to the above-described functions; for example, the transceiver unit can be replaced by a transceiver (for example, the transmitting unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor to respectively perform the transceiver operations and related processing operations in each method embodiment.

[0394] In addition, the transceiver unit 1310 may also be a transceiver circuit (for example, may include a receiving circuit and a sending circuit), and the processing unit may be a processing circuit.

[0395] It should be noted that the apparatus in FIG13 may be the communication device in the aforementioned embodiment, or may be a chip or chip system, such as a system on chip (SoC). The transceiver unit may be an input / output circuit or a communication interface; the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip. This is not limited here.

[0396] Referring to FIG. 14 , FIG. 14 is a schematic diagram of another communication device 1400 provided in an embodiment of the present application. The device 1400 includes a processor 1410 coupled to a memory 1420. The memory 1420 is configured to store computer programs or instructions and / or data. The processor 1410 is configured to execute the computer programs or instructions stored in the memory 1420, or read data stored in the memory 1420, to perform the methods described in the above method embodiments.

[0397] Optionally, there are one or more processors 1410 .

[0398] Optionally, there are one or more memories 1420 .

[0399] Optionally, the memory 1420 is integrated with the processor 1410 or provided separately.

[0400] Optionally, as shown in Figure 14, the apparatus 1400 further includes a transceiver 1430, which is configured to receive and / or transmit signals. For example, the processor 1410 is configured to control the transceiver 1430 to receive and / or transmit signals.

[0401] As an example, the processor 1410 may have the function of the processing unit 1320 shown in FIG. 13 , the memory 1420 may have the function of a storage unit, and the transceiver 1430 may have the function of the transceiver unit 1310 shown in FIG. 13 .

[0402] As a solution, the device 1400 is used to implement the operations performed by the communication device in the above various method embodiments.

[0403] For example, the processor 1410 is used to execute the computer program or instructions stored in the memory 1420 to implement the relevant operations of the terminal device or network device in the above various method embodiments.

[0404] It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0405] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory and / or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM includes the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0406] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated into the processor.

[0407] It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0408] 15 , which is a schematic diagram of a chip system 1500 according to an embodiment of the present application. The chip system 1500 (or also referred to as a processing system) includes a logic circuit 1510 and an input / output interface 1520 .

[0409] Logic circuit 1510 may be a processing circuit within chip system 1500. Logic circuit 1510 may be coupled to a storage unit and invoke instructions within the storage unit, enabling chip system 1500 to implement the methods and functions of various embodiments of the present application. Input / output interface 1520 may be an input / output circuit within chip system 1500, outputting information processed by chip system 1500 or inputting data or signaling information to be processed into chip system 1500 for processing.

[0410] As a solution, the chip system 1500 is used to implement the operations performed by a communication device (such as a terminal device or a network device) in the above various method embodiments.

[0411] For example, the logic circuit 1510 is used to implement the processing-related operations performed by the communication device (such as a terminal device, or a network device) in the above method embodiments; the input / output interface 1520 is used to implement the sending and / or receiving-related operations performed by the communication device (such as a terminal device, or a network device) in the above method embodiments.

[0412] An embodiment of the present application further provides a computer-readable storage medium storing computer instructions for implementing the methods executed by a communication device (such as a terminal device or a network device) in the above-mentioned method embodiments.

[0413] For example, when the computer program is executed by a computer, the computer can implement the methods performed by a communication device (such as a terminal device, or a network device) in each embodiment of the above method.

[0414] An embodiment of the present application further provides a computer program product comprising instructions, which, when executed by a computer, implement the methods performed by a communication device (such as a terminal device or a network device) in the above-mentioned method embodiments.

[0415] The present application also provides a communication system, which includes the terminal device and / or network device in the above embodiments. For example, the system includes the terminal device and network device in Figure 5 or Figure 6 or Figure 10 or Figure 12.

[0416] The explanation of the relevant contents and beneficial effects of any of the above-mentioned devices can be referred to the corresponding method embodiments provided above, which will not be repeated here.

[0417] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0418] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part 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 described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. For example, the computer can be a personal computer, a server, or a network device, etc. The 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, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)). For example, the aforementioned available medium includes, but is not limited to, various media that can store program code, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0419] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: include: The network device sends N synchronization signals, where N is an integer greater than 1; The network device sends M physical downlink control channels PDCCH, and the M PDCCHs are used to schedule the system information corresponding to the N synchronization signals or the N beams. The system information corresponding to the N synchronization signals or the N beams is the system information sent within the same time window. The information carried by the M PDCCHs is the same, and M is an integer greater than 1 or equal to 1.

2. The method according to claim 1, characterized in that: The information carried by each PDCCH in the M PDCCHs includes at least one of the following: modulation and coding scheme, time domain resource allocation, frequency domain resource allocation, redundant version, new data indication, resource mapping mode, and demodulation reference signal symbol position.

3. The method according to claim 1 or 2, characterized in that: The method further comprises: The network device sends N PDSCHs, and the N PDSCHs include the N synchronization signals or system information corresponding to the N beams.

4. The method according to claim 3, characterized in that The N PDSCHs include a first PDSCH, and the index of the redundant version of the first PDSCH is associated with at least one of the following: the index of the first PDSCH, the index of the beam corresponding to the first PDSCH, the index of the synchronization signal corresponding to the first PDSCH, and the value of N.

5. The method according to claim 3, characterized in that: The redundancy version of each PDSCH in the N PDSCHs is the same.

6. The method according to any one of claims 1 to 5, characterized in that The method further comprises: The network device sends first indication information, where the first indication information indicates a value of N.

7. The method according to claim 6, characterized in that The first indication information is any one of: the synchronization signal, the demodulation reference signal corresponding to the PDCCH, the demodulation reference signal corresponding to the PDSCH, or the demodulation reference signal corresponding to the synchronization signal.

8. The method according to any one of claims 1 to 7, characterized in that The value of N is any of the following: 2, 4, 6, 8.

9. The method according to any one of claims 1 to 8, characterized in that The method further comprises: The network device sends second indication information, where the second indication information indicates that information carried by the M PDCCHs is the same, or the second indication information indicates joint reception of the M PDCCHs.

10. The method according to claim 9, characterized in that The second indication information is any one of the following: the synchronization signal, a demodulation reference signal corresponding to the PDCCH, a demodulation reference signal corresponding to the PDSCH, or a demodulation reference signal corresponding to the synchronization signal.

11. The method according to any one of claims 1 to 10, characterized in that The N synchronization signals satisfy any of the following conditions: Time domain resources occupied by two adjacent synchronization signals among the N synchronization signals are adjacent; The intervals between the time domain resources occupied by two adjacent synchronization signals in the N synchronization signals are the same; The indexes of two adjacent synchronization signals among the N synchronization signals are adjacent; or, The intervals between indexes of two adjacent synchronization signals among the N synchronization signals are the same.

12. A communication method, characterized in that: include: The terminal device receives N synchronization signals, where N is an integer greater than 1; The terminal device receives M physical downlink control channels PDCCH, and the M PDCCHs are used to schedule the system information corresponding to the N synchronization signals or the N beams. The system information corresponding to the N synchronization signals or the N beams is the system information sent within the same time window. The information carried by the M PDCCHs is the same, and M is an integer greater than 1 or equal to 1.

13. The method according to claim 12, characterized in that The information carried by each PDCCH in the M PDCCHs includes at least one of the following: modulation and coding scheme, time domain resource allocation, frequency domain resource allocation, redundant version, new data indication, resource mapping mode, and demodulation reference signal symbol position.

14. The method according to claim 12 or 13, characterized in that The method further comprises: The terminal device receives N PDSCHs, and the N PDSCHs include system information corresponding to the N synchronization signals or N beams.

15. The method according to claim 14, characterized in that The N PDSCHs include a first PDSCH, and the index of the redundant version of the first PDSCH is associated with at least one of the following: the index of the first PDSCH, the index of the beam corresponding to the first PDSCH, the index of the synchronization signal corresponding to the first PDSCH, and the value of N.

16. The method according to claim 14, characterized in that The redundancy version of each PDSCH in the N PDSCHs is the same.

17. The method according to any one of claims 12 to 16, characterized in that The method further comprises: The terminal device receives first indication information, where the first indication information indicates a value of N.

18. The method according to claim 17, characterized in that The first indication information is any one of: the synchronization signal, the demodulation reference signal corresponding to the PDCCH, the demodulation reference signal corresponding to the PDSCH, or the demodulation reference signal corresponding to the synchronization signal.

19. The method according to any one of claims 12 to 18, characterized in that The value of N is any of the following: 2, 4, 6, 8.

20. The method according to any one of claims 12 to 19, characterized in that The method further includes: the terminal device receives second indication information, the second indication information indicating that the information carried by the M PDCCHs is the same, or the second indication information indicates joint reception of the M PDCCHs; or, The terminal device itself determines to jointly receive the M PDCCHs.

21. The method according to claim 20, characterized in that The second indication information is any one of the following: the synchronization signal, a demodulation reference signal corresponding to the PDCCH, a demodulation reference signal corresponding to the PDSCH, or a demodulation reference signal corresponding to the synchronization signal.

22. The method according to any one of claims 12 to 21, characterized in that The N synchronization signals satisfy any of the following conditions: Time domain resources occupied by two adjacent synchronization signals among the N synchronization signals are adjacent; The intervals between the time domain resources occupied by two adjacent synchronization signals in the N synchronization signals are the same; The indexes of two adjacent synchronization signals among the N synchronization signals are adjacent; or, The intervals between indexes of two adjacent synchronization signals among the N synchronization signals are the same.

23. A communication method, characterized in that: include: The network device sends at least one third indication information, where the at least one third indication information indicates scheduling information of each PDSCH in N physical downlink shared channels PDSCH, where the N PDSCHs include N synchronization signals or system information corresponding to N beams, where the N synchronization signals or the system information corresponding to the N beams are system information sent within the same time window, and the third indication information includes at least one of the following: the synchronization signal, the demodulation reference signal corresponding to the PDSCH, or the demodulation reference signal corresponding to the synchronization signal, where N is an integer greater than 1; The network device sends the N PDSCHs.

24. The method according to claim 23, characterized in that The scheduling information of each PDSCH in the N PDSCHs includes at least one of the following: modulation and coding scheme, time domain resource allocation, frequency domain resource allocation, redundant version, new data indication, resource mapping mode, and demodulation reference signal symbol position.

25. The method according to claim 23 or 24, characterized in that The N PDSCHs include a first PDSCH, and a frequency domain resource position of the first PDSCH is associated with a frequency domain resource position of a synchronization signal corresponding to the first PDSCH.

26. The method according to claim 25, characterized in that The frequency domain resources of the first PDSCH are associated with the frequency domain resources of the synchronization signal corresponding to the first PDSCH, including: the starting position of the frequency domain resources of the first PDSCH is the same as the starting position of the frequency domain resources of the synchronization signal corresponding to the first PDSCH; or, the ending position of the frequency domain resources of the first PDSCH is determined according to the starting position of the frequency domain resources of the synchronization signal corresponding to the first PDSCH, and the scheduling bandwidth information indicated by the synchronization signal corresponding to the first PDSCH.

27. The method according to any one of claims 23 to 26, characterized in that The method further comprises: The network device sends first indication information, where the first indication information indicates a value of N.

28. The method according to claim 27, characterized in that The first indication information is any one of the following: the synchronization signal, a demodulation reference signal corresponding to the PDSCH, or a demodulation reference signal corresponding to the synchronization signal.

29. The method according to any one of claims 23 to 28, characterized in that The value of N is any of the following: 2, 4, 6, 8.

30. The method according to any one of claims 23 to 29, characterized in that The method further comprises: The network device sends fourth indication information, where the fourth indication information indicates whether the network device sends physical downlink control information PDCCH for scheduling the N PDSCHs.

31. The method according to claim 30, characterized in that The fourth indication information is any one of the following: the synchronization signal, a demodulation reference signal corresponding to the PDSCH, or a demodulation reference signal corresponding to the synchronization signal.

32. The method according to any one of claims 23 to 31, characterized in that The N PDSCHs include a first PDSCH, and the index of the redundant version of the first PDSCH is associated with at least one of the following: the index of the first PDSCH, the index of the beam corresponding to the first PDSCH, the index of the synchronization signal corresponding to the first PDSCH, and the value of N.

33. The method according to any one of claims 23 to 32, characterized in that The scheduling information of each PDSCH in the N PDSCHs is the same.

34. A communication method, characterized in that: include: The terminal device receives at least one third indication information, where the at least one third indication information indicates scheduling information of each PDSCH in N physical downlink shared channels PDSCH, where the N PDSCHs include N synchronization signals or system information corresponding to N beams, where the N synchronization signals or the system information corresponding to the N beams are system information sent within the same time window, and the third indication information includes at least one of the following: the synchronization signal, the demodulation reference signal corresponding to the PDSCH, or the demodulation reference signal corresponding to the synchronization signal, where N is an integer greater than 1; The terminal device receives the N PDSCHs based on the at least one third indication information.

35. The method according to claim 34, characterized in that The scheduling information of each PDSCH in the N PDSCHs includes at least one of the following: modulation and coding scheme, time domain resource allocation, frequency domain resource allocation, redundant version, new data indication, resource mapping mode, and demodulation reference signal symbol position.

36. The method according to claim 34 or 35, characterized in that The N PDSCHs include a first PDSCH, and a frequency domain resource position of the first PDSCH is associated with a frequency domain resource position of a synchronization signal corresponding to the first PDSCH.

37. The method according to claim 36, characterized in that The frequency domain resources of the first PDSCH are associated with the frequency domain resources of the synchronization signal corresponding to the first PDSCH, including: the starting position of the frequency domain resources of the first PDSCH is the same as the starting position of the frequency domain resources of the synchronization signal corresponding to the first PDSCH; or, the ending position of the frequency domain resources of the first PDSCH is determined according to the starting position of the frequency domain resources of the synchronization signal corresponding to the first PDSCH, and the scheduling bandwidth information indicated by the synchronization signal corresponding to the first PDSCH.

38. The method according to any one of claims 34 to 37, characterized in that The method further comprises: The terminal device receives first indication information, where the first indication information indicates a value of N.

39. The method according to claim 38, characterized in that The first indication information is any one of the following: the synchronization signal, a demodulation reference signal corresponding to the PDSCH, or a demodulation reference signal corresponding to the synchronization signal.

40. The method according to any one of claims 34 to 39, characterized in that The value of N is any of the following: 2, 4, 6, 8.

41. The method according to any one of claims 34 to 40, characterized in that The method further comprises: The terminal device receives fourth indication information, and the fourth indication information indicates whether the network device sends physical downlink control information PDCCH for scheduling the N PDSCHs.

42. The method according to claim 41, characterized in that The fourth indication information is any one of the following: the synchronization signal, a demodulation reference signal corresponding to the PDSCH, or a demodulation reference signal corresponding to the synchronization signal.

43. The method according to any one of claims 34 to 42, characterized in that The N PDSCHs include a first PDSCH, and the index of the redundant version of the first PDSCH is associated with at least one of the following: the index of the first PDSCH, the index of the beam corresponding to the first PDSCH, the index of the synchronization signal corresponding to the first PDSCH, and the value of N.

44. The method according to any one of claims 34 to 43, characterized in that The scheduling information of each PDSCH in the N PDSCHs is the same.

45. A communication method, characterized in that: include: The network device determines scheduling information of N physical downlink shared channels PDSCH, where the N PDSCHs include system information corresponding to N synchronization signals or N beams, where the system information corresponding to the N synchronization signals or the N beams is system information sent within the same time window, and the scheduling information of each PDSCH in the N PDSCHs is the same, and N is an integer greater than 1; The network device sends the N PDSCHs.

46. ​​The method according to claim 45, characterized in that The method further comprises: The network device sends M physical downlink control channels PDCCH, and the M PDCCHs are used to schedule the system information corresponding to the N synchronization signals or N beams. The information carried by the M PDCCHs is the same, and M is an integer greater than 1 or equal to 1.

47. The method according to claim 45, characterized in that The method further comprises: The network device sends at least one third indication information, where the at least one third indication information indicates scheduling information of each PDSCH in the N PDSCHs.

48. The method according to claim 47, characterized in that The third indication information includes at least one of the following: the synchronization signal, a demodulation reference signal corresponding to the PDSCH, or a demodulation reference signal corresponding to the synchronization signal.

49. A communication method, characterized in that: include: The terminal device determines scheduling information of N physical downlink shared channels PDSCH, where the N PDSCHs include system information corresponding to N synchronization signals or N beams, where the system information corresponding to the N synchronization signals or N beams is system information sent within the same time window, and the scheduling information of each PDSCH in the N PDSCHs is the same, and N is an integer greater than 1; The terminal device receives the N PDSCHs.

50. The method according to claim 49, characterized in that The method further comprises: The terminal device receives M physical downlink control channels PDCCH, and the M PDCCHs are used to schedule the system information corresponding to the N synchronization signals or N beams. The information carried by the M PDCCHs is the same, and M is an integer greater than 1 or equal to 1.

51. The method according to claim 49, characterized in that The method further comprises: The terminal device receives at least one third indication information, where the at least one third indication information indicates scheduling information of each PDSCH in the N PDSCHs.

52. The method according to claim 51, characterized in that The third indication information includes at least one of the following: the synchronization signal, a demodulation reference signal corresponding to the PDSCH, or a demodulation reference signal corresponding to the synchronization signal.

53. A communication device, characterized in that: include: A unit for performing the method as claimed in any one of claims 1 to 11, or a unit for performing the method as claimed in any one of claims 12 to 22, or a unit for performing the method as claimed in any one of claims 23 to 33, or a unit for performing the method as claimed in any one of claims 34 to 44, or a unit for performing the method as claimed in any one of claims 45 to 48, or a unit for performing the method as claimed in any one of claims 49 to 52.

54. A communication device, characterized in that: Comprising a processor, wherein the processor is configured to cause the communication device to perform the method described in any one of claims 1 to 11, or cause the communication device to perform the method described in any one of claims 12 to 22, or cause the communication device to perform the method described in any one of claims 23 to 33, or cause the communication device to perform the method described in any one of claims 34 to 44, or cause the communication device to perform the method described in any one of claims 45 to 48, or cause the communication device to perform the method described in any one of claims 49 to 52.

55. The device according to claim 54, characterized in that The device also includes a memory and / or a communication interface, The communication interface is coupled to the processor, and the communication interface is used to input and / or output information; The memory is used to store computer programs or instructions executed by the processor.

56. The device according to any one of claims 53 to 55, characterized in that The device is any one of the following: a communication device, a chip, a chip system, or a circuit.

57. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program or instructions, and when the computer program or instructions are executed on the communication device, the communication device executes the method described in any one of claims 1 to 11, or the communication device executes the method described in any one of claims 12 to 22, or the communication device executes the method described in any one of claims 23 to 33, or the communication device executes the method described in any one of claims 34 to 44, or the communication device executes the method described in any one of claims 45 to 48, or the communication device executes the method described in any one of claims 49 to 52.

58. A computer program product, characterized in that The computer program product comprises a computer program or instructions for executing the method as claimed in any one of claims 1 to 11, or the computer program product comprises a computer program or instructions for executing the method as claimed in any one of claims 12 to 22, or the computer program product comprises a computer program or instructions for executing the method as claimed in any one of claims 23 to 33, or the computer program product comprises a computer program or instructions for executing the method as claimed in any one of claims 34 to 44, or the computer program product comprises a computer program or instructions for executing the method as claimed in any one of claims 45 to 48, or the computer program product comprises a computer program or instructions for executing the method as claimed in any one of claims 49 to 52.

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