Communication method and communication device

Abstract

The invention provides a communication method and a communication device. The method may comprise: a network device sending N synchronization signals, N being an integer greater than 1; a network device sends M PDCCHs, and a terminal device jointly receives the M PDCCHs. Wherein the M PDCCHs are used for scheduling 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 in the same time window, the information borne by the M PDCCHs is the same, and M is an integer greater than 1 or equal to 1. According to the method and the device, the information borne by the M PDCCHs is the same, so that the terminal equipment can jointly receive the M PDCCHs, and the transmission performance can be improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a communication method and a communication device. Background Art

[0002] In wireless communications, network devices can broadcast synchronization signals periodically, and terminal devices can receive the synchronization signals. Based on the synchronization signal, the terminal device receives the physical downlink control channel (PDCCH) and receives the physical downlink shared channel (PDSCH) scheduled by the PDCCH. Through the PDSCH, the system information carried in the PDSCH can be obtained, and then corresponding operations can be performed based on the system information, such as obtaining the configuration information of random access resources and performing random access. For the system information transmission scenario of the multi-beam system, how to transmit the system information is a question worth considering. Summary of the invention

[0003] 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.

[0004] In a first aspect, a communication method is provided, which can be performed by a device. The device can be a network device, or can be a component of a network device (such as a chip or a chip system or a circuit), which is not limited in this application. The following is an example of a network device.

[0005] 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 M PDCCHs carry the same information, and where M is an integer greater than 1 or equal to 1.

[0006] Among them, the N beams are beams corresponding to N synchronization signals.

[0007] As an example, M=N.

[0008] Based on the above technical solution, the M PDCCHs used to schedule 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 user experience.

[0009] 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.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: the network device sends N PDSCHs, and the N PDSCHs include system information corresponding to the N synchronization signals or N beams.

[0011] Based on the above technical solution, the system information is carried in the PDSCH, and the information carried by the PDCCH may include the scheduling information of the PDSCH. The information carried by the PDCCH is the same, that is, the scheduling information of the PDSCH is the same. Since the scheduling information of the N PDSCHs is the same, the receiving end can jointly receive the N PDSCHs, thereby improving the transmission performance and user experience.

[0012] In combination with the first aspect, in certain implementations of the first aspect, the N PDSCHs include a first PDSCH, and the index of a 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.

[0013] Based on the above technical solution, the index of the redundant version of PDSCH can be associated with at least one of the above items. For example, the index of the redundant version of PDSCH is associated with the index of the synchronization signal, so that the redundant version indexes of PDSCH corresponding to different synchronization signals are different, thereby improving the transmission performance of PDSCH. For another example, the index of the redundant version of PDSCH is associated with the value of N, so that the redundant version indexes of different PDSCHs are the same, thereby making joint reception at the receiving end simpler.

[0014] 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.

[0015] Based on the above technical solution, the indexes of the redundant versions of each PDSCH are the same, which makes the joint reception at the receiving end simpler.

[0016] 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.

[0017] 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.

[0018] In combination with the first aspect, in some implementations of the first aspect, the value of N is any of the following: 2, 4, 6, 8.

[0019] In combination with the first aspect, in certain 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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 a chip system or a circuit), which is not limited in this application. The following is an example of a terminal device.

[0025] 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 M PDCCHs carry the same information, and where M is an integer greater than 1 or equal to 1.

[0026] 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.

[0027] In combination with the second aspect, in certain implementations of the second aspect, the method further includes: the terminal device receives N PDSCHs, and the N PDSCHs include system information corresponding to the N synchronization signals or N beams.

[0028] In combination with the second aspect, in certain implementations of the second aspect, the N PDSCHs include a first PDSCH, and the index of a 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.

[0029] 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.

[0030] In combination with the second aspect, in some implementations of the second aspect, the method further includes: the terminal device receives first indication information, and the first indication information indicates a value of N.

[0031] 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.

[0032] In combination with the second aspect, in some implementations of the second aspect, the value of N is any of the following: 2, 4, 6, 8.

[0033] 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 joint reception of the M PDCCHs; or the terminal device itself determines to jointly receive the M PDCCHs.

[0034] 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.

[0035] 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.

[0036] 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, time domain resource position.

[0037] The beneficial effects of the second aspect can be referred to the relevant description of the first aspect and will not be elaborated here.

[0038] In a third aspect, a communication method is provided, which can be performed by a device. The device can be a network device, or can be a component of a network device (such as a chip or a chip system or a circuit), which is not limited in this application. The following is an example of a network device.

[0039] The method may include: a network device sends at least one third indication information, wherein the at least one third indication information indicates 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, 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, and N is an integer greater than 1; the network device sends the N PDSCHs.

[0040] The third indication information is information other than PDCCH.

[0041] Based on the above technical solution, the transmission of system information can be done without PDCCH, that is, the scheduling information of PDSCH can be scheduled by other information (i.e., the third indication information) other than PDCCH, and does not need to be scheduled through PDCCH, and thus the network device does not need to send PDCCH. In this way, the resources originally used to transmit PDCCH are based on the transmission of PDSCH, thereby improving the coverage rate.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] In combination with the third aspect, in some implementations of the third aspect, the method further includes: the network device sends first indication information, and the first indication information indicates a value of N.

[0047] 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.

[0048] In combination with the third aspect, in some implementations of the third aspect, the value of N is any of the following: 2, 4, 6, 8.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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 a chip system or a circuit), which is not limited in this application. The following is an example of a terminal device.

[0056] The method may include: a terminal device receives at least one third indication information, wherein the at least one third indication information indicates 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 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, and N is an integer greater than 1; the terminal device receives the N PDSCHs based on the at least one third indication information.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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 a value of N.

[0061] 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.

[0062] In combination with the fourth aspect, in some implementations of the fourth aspect, the value of N is any of the following: 2, 4, 6, 8.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] In combination with the fourth aspect, in certain implementations of the fourth aspect, scheduling information of each PDSCH in the N PDSCHs is the same.

[0067] The beneficial effects of the fourth aspect can be referred to the relevant description of the third aspect and will not be elaborated here.

[0068] In a fifth aspect, a communication method is provided, which can be performed by a device. The device can be a network device, or can be a component of a network device (such as a chip or a chip system or a circuit), which is not limited in this application. The following is an example of a network device.

[0069] 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.

[0070] 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.

[0071] In combination with the fifth aspect, in certain implementations of the fifth aspect, the method also 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.

[0072] Regarding this solution, please refer to the first aspect and will not be elaborated here.

[0073] In combination with the fifth aspect, in certain implementations of the fifth aspect, the method also includes: the method also 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.

[0074] Regarding this solution, please refer to the third aspect, which will not be elaborated here.

[0075] In combination with the fifth aspect, in certain implementations of the fifth aspect, the method also 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.

[0076] 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 a chip system or a circuit), which is not limited in this application. The following is an example of a terminal device.

[0077] The method may include: a terminal 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 terminal device receives the N PDSCHs.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] The beneficial effects of the sixth aspect can be referred to the relevant description of the fifth aspect and will not be repeated here.

[0082] In a seventh aspect, a communication device is provided, the device being used to execute the method provided in any one of the first to sixth aspects. Specifically, the device may include a unit and / or module, such as a processing unit and / or a communication unit, for executing the method provided in any one of the above implementations of any one of the first to sixth aspects.

[0083] In one implementation, the apparatus is a communication device (such as 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. Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0084] In another implementation, the device is a chip, a chip system or a circuit used in a communication device. When the device is a chip, a chip system or a circuit used in a communication device, the communication unit may be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip, the chip system or the circuit; the processing unit may be at least one processor, a processing circuit or a logic circuit.

[0085] 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 a method provided in any one of the above-mentioned implementations of any one of the above-mentioned first to sixth aspects.

[0086] In one implementation, the apparatus is a communication device (such as a terminal device or a network device).

[0087] In another implementation, the apparatus is a chip, a chip system or a circuit used in a communication device.

[0088] In a ninth aspect, the present application provides a processor for executing the methods provided in the above aspects.

[0089] For the operations such as sending and acquiring / receiving involved in the processor, unless otherwise specified, or unless they conflict with their actual function or internal logic in the relevant description, 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, and this application does not limit this.

[0090] 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.

[0091] In the eleventh aspect, a computer program product comprising instructions is provided. When the computer program product is run on a computer, the computer executes the method provided by any one of the above-mentioned implementation modes of any one of the above-mentioned first to sixth aspects.

[0092] In the twelfth aspect, a chip is provided, the chip including a processor and a communication interface, the processor reads instructions stored in a memory through the communication interface, and executes a method provided by any one of the above-mentioned implementation methods of any one of the above-mentioned first to sixth aspects.

[0093] Optionally, as an implementation method, the chip also includes a memory, in which a computer program or instructions are stored, and the processor is used to execute the computer program or instructions stored in the memory. When the computer program or instructions are 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.

[0094] In the thirteenth aspect, a communication system is provided, including a terminal device and a network device. The network device is used to execute the method provided in any one of the implementations of the first aspect, and the terminal device is used to execute the method provided in any one of the implementations of the second aspect; or, the network device is used to execute the method provided in any one of the implementations of the third aspect, and the terminal device is used to execute the method provided in any one of the implementations of the fourth aspect; or, the network device is used to execute the method provided in any one of the implementations of the fifth aspect, and the terminal device is used to execute the method provided in any one of the implementations of the sixth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0095] Figure 1 is a schematic diagram of a wireless communication system applicable to an embodiment of the present application.

[0096] Figure 2 It is a schematic diagram of information transmission applicable to an embodiment of the present application.

[0097] Figure 3 This is a schematic diagram of a transmission method for SSB and SIB1.

[0098] Figure 4 It is a schematic diagram of using different beams to transmit information.

[0099] Figure 5 It is a schematic diagram of a communication method 500 provided in an embodiment of the present application.

[0100] Figure 6 It is a schematic diagram of a communication method 600 provided in another embodiment of the present application.

[0101] Figure 7 is a schematic diagram of SSB and system information transmission applicable to scheme 1.

[0102] Figure 8 FIG. 2 is a schematic diagram of SSB and system information transmission applicable to Scheme 2.

[0103] Fig. 9 is another schematic diagram of SSB and system information transmission applicable to scheme 2.

[0104] Fig.10 It is a schematic diagram of a communication method 1000 provided in another embodiment of the present application.

[0105] Fig.11 It is a schematic diagram of SSB and system information transmission without PDCCH transmission applicable to an embodiment of the present application.

[0106] Fig.12 It is a schematic flowchart of a communication method 1200 provided according to an embodiment of the present application.

[0107] Fig.13 It is a schematic block diagram of a communication device 1300 provided in an embodiment of the present application.

[0108] Fig.14 It is a schematic diagram of another communication device 1400 provided in an embodiment of the present application.

[0109] Fig.15 It is a schematic diagram of a chip system 1500 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0110] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0111] The technical solution provided in this application can be applied to various communication systems, such as: the fifth generation (5th generation, 5G) or new radio (new radio, NR) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, etc. The technical solution provided in this application can also be applied to low-frequency scenarios, high-frequency scenarios, terahertz, optical communications, etc. The technical solution provided in this application can also be applied to future communication systems, such as the sixth generation (6th generation, 6G) mobile communication system. The technical solution provided in this application can also be applied to device to device (device to device, D2D) communication, vehicle to everything (vehicle-to-everything, V2X) communication, machine to machine (machine to machine, M2M) communication, machine type communication (machine type communication, MTC), and Internet of things (Internet of things, IoT) communication system. The technical solution 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 a terminal device. The satellite base station provides communication services for the terminal device. The satellite base station can also communicate with the base station. The satellite can be used as a base station or as a terminal device. Among them, the satellite can refer to a drone, a hot air balloon, a low-orbit satellite, a medium-orbit satellite, a high-orbit satellite, etc. The satellite can also refer to a non-ground base station or non-ground equipment, etc.

[0112] A device in a communication system may send a signal to another device or receive a signal from another device. The signal may include information, signaling, or data, etc. The device may also be replaced by an entity, a network entity, a network element, a communication device, a communication module, a node, a communication node, etc. The present disclosure takes the device as an example for description. For example, the communication system may include at least one terminal device and at least one network device. The network device may send a downlink signal to the terminal device, and / or the terminal device may send an uplink signal to the network device.

[0113] 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, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wear, 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), terminal, fixed device, mobile station device or mobile device of the third generation partnership project (3GPP) standard, 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, etc.), a ship, a remote control device, a smart home device, an industrial device, or a device built into the above-mentioned device (for example, a communication module, a modem or a chip in the above-mentioned device, etc.), or other processing devices connected to the wireless modem. For the convenience of description, the terminal device is described below by taking the terminal or UE as an example.

[0114] It should be understood that in some scenarios, the UE can also be used to act as a base station. For example, the UE can act as a scheduling entity that provides sidelink signals between UEs in scenarios such as V2X, D2D or P2P.

[0115] In the embodiment of the present application, the device for realizing 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 realize the function, such as a chip system or a chip, which can be installed in the terminal device. In the embodiment of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0116] The network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be referred to as an access network device or a wireless access network device, such as a base station. The network device in the embodiment of the present application may refer to a wireless 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 with 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, a modem or a chip for being arranged in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs the base station function in D2D, V2X, and M2M communications, a network-side device in a 6G network, or a device that performs the base station function in a future communication system. 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 device.

[0117] 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.

[0118] 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.

[0119] In the embodiment of the present application, the device for realizing the function of the network device can be a network device, or a device capable of supporting the network device to realize the function, such as a chip system or a chip, which can be installed in the network device. In the embodiment of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0120] The network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and satellites in the air. The embodiments of the present application do not limit the scenarios in which the network equipment and terminal equipment are located.

[0121] First, a communication system applicable to an embodiment of the present application is briefly introduced as follows.

[0122] See also Figure 1 , Figure 1 is a schematic diagram of a wireless communication system applicable to an embodiment of the present application.

[0123] like Figure 1 As shown, the wireless communication system includes a wireless access network 100. The wireless access network 100 may be a next generation (e.g., 6G or higher) wireless access network, or a traditional (e.g., 5G, 4G, 3G, or 2G) wireless access network. One or more terminal devices (120a-120j, collectively referred to as 120) may be connected to each other or to one or more network devices (110a, 110b, collectively referred to as 110) in the wireless access network 100. Network elements in the wireless communication system are connected via interfaces (e.g., NG, Xn) or air interfaces.

[0124] Figure 1 This is just a schematic diagram. The wireless communication system may also include other devices, such as core network devices, wireless relay devices and / or wireless backhaul devices. Figure 1 Not drawn in.

[0125] In order to facilitate a better understanding of the technical solution of the present application, some related technologies involved in the technical solution of the present application are introduced.

[0126] 1. Antenna port: It is a logical concept. An antenna port has no direct correspondence with a physical antenna. Antenna ports are usually associated with reference signals, and their meaning can be understood as a transceiver interface on the channel that the reference signal passes through. For low frequencies, an antenna port may correspond to one or more antenna elements, which jointly send reference signals. The receiver can treat them as a whole without distinguishing between these elements. For high-frequency systems, an antenna port may correspond to a beam. Similarly, the receiver can treat this beam as an interface without distinguishing between each element.

[0127] 2. Port group: a collection corresponding to 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).

[0128] 3. Beam: A communication resource. Different beams can be considered as different resources. The same information or different information can be sent through different beams.

[0129] The embodiment of beam in NR protocol can be spatial domain filter, also known as spatial filter or spatial parameter. The beam used to send signals can be called transmission beam (Tx beam), and the beam used to receive signals can be called reception beam (Rx beam).

[0130] The transmit beam may refer to the distribution of signal strength in different directions of space after the signal is transmitted by the antenna, and the receive beam may refer to the distribution of signal strength in different directions of space of the wireless signal received from the antenna.

[0131] In addition, the beam may be a wide beam, a narrow beam, or other types of beams. The technology for forming the beam may be a beamforming technology or other technologies. The beamforming technology may specifically be a digital beamforming technology, an analog beamforming technology, or a hybrid digital / analog beamforming technology.

[0132] As an example, multiple beams having the same or similar communication characteristics may be considered as one beam.

[0133] A beam may correspond to one or more antenna ports, which are used to transmit data channels, control channels, and sounding signals, etc. One or more antenna ports corresponding to a beam may also be regarded as an antenna port set.

[0134] 4. Reference signal: It can also be called pilot, reference sequence, benchmark signal, etc. For the sake of consistency, the following description uses reference signal. Reference signal refers to a physical signal that carries a sequence and is sent to achieve a specific function. Specifically, the reference signal is a physical signal generated by mapping a specific sequence to the corresponding resource according to the pre-transmitted resource mapping method.

[0135] As an example, uplink communication includes the transmission of uplink physical channels and uplink signals. Wherein, uplink physical channels include but are not limited to: random access channel (PRACH), uplink control channel (physical uplink control channel, PUCCH), uplink data channel (physical uplink shared channel, PUSCH), etc. Wherein, uplink signals include but are not limited to: channel sounding signal (SRS), demodulation reference signal (DMRS), uplink phase noise tracking reference signal (PTRS), uplink positioning reference signal (uplink positioning reference signal), etc. Wherein, DMRS includes but is not limited to: uplink control channel demodulation reference signal PUCCH-DMRS, uplink data channel demodulation reference signal PUSCH-DMRS.

[0136] As an example, downlink communication includes transmission of downlink physical channels and downlink signals. Wherein, downlink physical channels include but are not limited to: broadcast channel (physical broadcast channel, PBCH), downlink control channel (physical downlink control channel, PDCCH), downlink data channel (physical downlink shared channel, PDSCH), etc. Wherein, downlink signals include but are not limited to: primary synchronization signal (primary synchronization signal, PSS) / secondary synchronization signal (secondary synchronization signal, SSS), DMRS, PTRS, channel status information reference signal (channel status information reference signal, CSI-RS), cell signal (cell reference signal, CRS), fine synchronization signal (time / frequency tracking reference signal, TRS), positioning reference signal (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.

[0137] It should be understood that the reference signals listed above are only examples and should not constitute any limitation to the present application. The present application does not exclude the possibility of defining other reference signals in future protocols to achieve the same or similar functions.

[0138] 5. Resources: Data or information can be carried by resources.

[0139] In the time domain, resources may include one or more time domain units (or, may also be referred to as time units). A time domain unit may be a symbol, or an orthogonal frequency division multiplexing (OFDM) symbol, or a mini-slot, or a slot, or a partial slot, or a subframe, or a radio frame, etc.

[0140] In the frequency domain, resources may include one or more frequency domain units. A frequency domain unit may be a resource block (RB), a subcarrier, a resource block group (RBG), a subband, a precoding resource block group (PRG), a bandwidth part (BWP), or a carrier, or a serving cell, etc.

[0141] 6. Synchronization signal block (SSB): also known as synchronization signal. It may include at least one of the following: primary synchronization signal (PSS), secondary synchronization signal (SSS), physical broadcast channel block (PBCH), and demodulation reference signal. For example, the primary synchronization signal and the secondary synchronization signal are referred to as synchronization signal (SS).

[0142] As an example, SSB can be used to implement the following functions: 1) cell synchronization and acquisition of master information block (MIB); 2) network equipment side beam training. The following is a brief introduction.

[0143] 1) Cell synchronization and acquisition of MIB: PSS and SSS in SSB can carry the physical cell identifier (PCI), and the terminal device obtains PCI by detecting PSS and SSS; in addition, PBCH in SSB can carry SSB index, and each SSB index corresponds to a location where the SSB is sent. Cell synchronization can be completed by detecting SSB index and the time when SSB is received. In addition, MIB can be carried in PBCH in SSB, so MIB can also be obtained based on SSB.

[0144] 2) Beam training on the network device side: An SSB pattern can contain multiple SSB indexes. Different SSB indexes correspond to different transmission beams of the network device. The terminal device can complete the beam training by detecting the SSB and selecting the transmission beam corresponding to the SSB with better quality. In addition, the terminal device can also complete the receiving beam training on the terminal device side by using multiple receiving beams to receive the same SSB. For the convenience of description, the SSB with better quality is SSB 1, and SSB1 corresponds to the transmission beam 1 of the network device as an example for further introduction. 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 PRACH, thereby improving the probability of successful PRACH reception; 3) after the terminal device completes the initial access to establish a 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.

[0145] 7. System information: It may also be called downlink common data, downlink common channel, cell broadcast information, or cell common information. As an example, the system information may include various system information blocks (SIBs), such as SIB1; or, the system information may also include MIBs.

[0146] 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 through MIB.

[0147] For example, the MIB includes control resource set zero (CORESET0) and common search space zero (CSS0), wherein CORESET0 is used to indicate the candidate frequency domain position of the DCI for scheduling SIB1, and CSS0 is used to indicate the candidate time domain position of the DCI for scheduling SIB1. The network device may use the same beam as that for sending SSB to send the SIB1 corresponding to the SSB. Accordingly, when the terminal device receives SIB1, it may use the same beam as that for receiving 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 for scheduling the SIB1.

[0148] 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 the information carried in the PDSCH scheduled by the PDCCH determined by CORESET0 and CSS0.

[0149] 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.

[0150] 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.

[0151] 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 (RE) 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 acquire the channel, perform demodulation, and ultimately recover the bit information. In general, 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).

[0152] 8. Random access (RA): The terminal device can perform random access through the information contained in SIB1.

[0153] See also Figure 2 , Figure 2 Schematic diagram of information transmission applicable to the embodiment of the present application. Figure 2 As shown, the network device can send SSB and SIB1 to the terminal device, and accordingly, the terminal device receives or detects the SSB and SIB1; if the terminal device receives SSB and SIB1, initial access can be performed.

[0154] As an example, a possible random access method, namely four-step random access, is introduced below. Four-step random access is only used to represent a name of a random access method, and its specific name does not limit the scope of the embodiments of the present application. Four-step random access means that four steps of information interaction (Msg1, Msg2, Msg3, Msg4) are required between the terminal device and the network device. The basic process of the four-step random access process is as follows.

[0155] Step 1: The terminal device sends a random access preamble (also called Msg1) to the network device. For example, the terminal device obtains random access configuration information, which includes the time-frequency resources (such as RACH time-frequency resources) used by the terminal device to send the random access preamble, 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.

[0156] As an example, the network device may configure multiple RACH occasions. The terminal device may select which RACH occasion, send which preamble, and use which transmit beam, based on the measurement result of the SSB index. In one possible implementation, there is a corresponding relationship between the SSB index and {RACH occasion, preamble index}. If the terminal device determines the SSB, the corresponding RACH occasion and preamble index may be determined. Among them, the preamble index represents the sequence index of the random access.

[0157] 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 RACHoccasion and preamble index set corresponding to the SSB index based on the correspondence between the SSB index and {RACHoccasion, preamble index}.

[0158] 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.

[0159] 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, also called Msg3, on the uplink resources allocated by Msg2. 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.

[0160] 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 has successfully accessed. The network device will carry the unique identifier in Msg3 in the conflict resolution message to specify the terminal device that has successfully accessed, and other terminal devices that have not successfully accessed will re-initiate random access.

[0161] 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.

[0162] It is understandable. Figure 2 This is a simplified diagram for ease of understanding. The information transmission process may include more steps. Figure 2 Not drawn in.

[0163] The above briefly describes the terms involved in this application, which will not be repeated in the following embodiments. In addition, the above description of terms is only for ease of understanding and does not limit the protection scope of the embodiments of this application.

[0164] The following is an introduction to a current transmission method of SSB and SIB1.

[0165] See also Figure 3 , Figure 3 This is a schematic diagram of a transmission method for SSB and SIB1.

[0166] like Figure 3 As shown, 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 SIB1PDCCH is determined according to the MIB in the SSB. For example, for an 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 10 ms, O and M are constants, and the 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, 7.5. As an example, the value of M may be 1 or 2.

[0167] 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) according to 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 according to 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, so detection can only be based on their respective SSBs, and the transmission efficiency is low.

[0168] See also Figure 4 , Figure 4 is a schematic diagram of using different beams to transmit information. Figure 4As shown, 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 the various beams 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.

[0169] In view of this, the present application proposes a method to achieve joint detection of each beam and improve transmission efficiency.

[0170] Before introducing the solution of this application, the following points are made.

[0171] (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.

[0172] In the present 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 relationship 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 by means of the arrangement order of each information agreed in advance (for example, specified by the protocol), thereby reducing the indication overhead to a certain extent. In addition, the information to be indicated can be sent 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.

[0173] (2) In this application, "send" and "receive" indicate the direction of signal transmission. For example, "send information to XX" can be understood as the destination of the information is 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 is 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. "Send" can also be understood as the "output" of the chip interface, and "receive" can also be understood as the "input" of the chip interface. In other words, sending and receiving can be performed between devices, for example, between network devices and terminal devices, or can be performed within a device, for example, sending or receiving between components, modules, chips, software modules or hardware modules within the device through a bus, wiring or interface.

[0174] (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, when one beam is used to transmit one SSB, it can be considered that the beam is the beam corresponding to the SSB, or in other words, the SSB is the SSB corresponding to the beam. It can be understood that the embodiments of the present application are mainly illustrated by taking one SSB corresponding to one beam as an example, and this is not limited to this. For example, one SSB may also correspond to multiple beams.

[0175] (4) In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between the different embodiments are consistent and can be referenced to each other. The technical features in the different embodiments can be combined to form a new embodiment based on their internal logical relationships.

[0176] (5) In this application, "first" and "second" are only used for convenience of description and to distinguish objects, and are not used to limit the scope of the embodiments of this application. They are not used to describe the order or sequence of features. It should be understood that the objects described in this way can be interchanged under appropriate circumstances so as to be able to describe solutions other than the embodiments of this application.

[0177] 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 above Figure 1 The communication system shown is not limited.

[0178] In the following embodiments, terminal devices and network devices are used as examples for exemplary description. The terminal device may also be replaced by a component of the terminal device (e.g., a chip or a chip system or circuit). The network device may also be replaced by a component of the network device (e.g., a chip or a chip system or circuit).

[0179] See also Figure 5 , Figure 5 It is a schematic diagram of a communication method 500 provided in an embodiment of the present application. Figure 5 The illustrated method 500 may include the following steps.

[0180] 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.

[0181] Take N SSBs as an example, where N PDSCHs include system information corresponding to N SSBs, indicating that each PDSCH includes system information corresponding to one SSB. For example, N=3, for distinction, the three PDSCHs are respectively 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, where the indexes of SSB#1, SSB#2, and SSB#3 are different.

[0182] The system information may include various SIBs, such as SIB1.

[0183] As an example, the length of the time window is any one 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.

[0184] 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 method, and DMRS symbol position.

[0185] 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.

[0186] In another example, the scheduling information of PDSCH includes TDRA. Based on this, the TDRA of each PDSCH in N PDSCHs is the same. As an example, TDRA includes at least one of the following: starting position, ending position, time length, offset position. Among them, the offset position can represent the offset position of PDSCH relative to other signals (such as PDCCH, and SSB). It can be understood that each item included in TDRA can be considered as a relative time domain position.

[0187] For example, assuming that TDRA includes a starting position and a time length, N=2, for the purpose of distinction, the two PDSCHs are referred to as PDSCH#1 and PDSCH#2. The TDRA of PDSCH#1 and PDSCH#2 are the same, which means that the starting position and time length of PDSCH#1 in a time domain unit (such as a slot) are the same as the starting position and time length of PDSCH#2 in a time domain unit (such as a time slot); or it means that the offset position and time length of PDSCH#1 relative to a certain signal (such as the PDCCH corresponding to PDSCH#1) are the same as the offset position and time length 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 time length is 3 symbols; the starting position of PDSCH#2 in slot#2 is the 5th symbol, and the time length is 3 symbols.

[0188] When the TDRA includes at least two of the starting position, the ending position, the time length, and the offset position, the TDRA of each PDSCH is the same, which can also be understood as at least one of the information in the TDRA of each PDSCH is the same. Taking the above example, the TDRA of PDSCH#1 and PDSCH#2 is the same, which can also mean that the starting position in the TDRA of PDSCH#1 and PDSCH#2 is the same, such as both are the 5th symbol.

[0189] In another example, the scheduling information of PDSCH includes FDRA. Based on this, the FDRA of each PDSCH in N PDSCHs is the same. As an example, FDRA includes at least one of the following: starting position, ending position, and resource length. It can be understood that each item included in FDRA can be considered as a relative frequency domain position (for example, an offset position relative to PDCCH, or an offset position relative to SSB). For details, please refer to the previous description of TDRA, which will not be repeated here.

[0190] Three examples are briefly listed above. It can be understood that the scheduling information of PDSCH may include at least one of the items listed above.

[0191] 520. The network device sends N PDSCHs.

[0192] Accordingly, the terminal device receives N PDSCHs. It can be understood that the terminal device receiving N PDSCHs does not limit the terminal device to receiving N PDSCHs. The terminal device receiving N PDSCHs 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.

[0193] As an example, the N PDSCHs sent by the network device may be continuous (e.g., the corresponding SSB indexes are continuous). Alternatively, the N PDSCHs sent by the network device may be non-continuous (e.g., the corresponding SSB indexes are discontinuous). Alternatively, the N PDSCHs may be continuous (e.g., the corresponding SSB indexes are continuous), and the network device may send only part of the N PDSCHs.

[0194] Based on the above technical solution, the scheduling information of each PDSCH in 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 improved.

[0195] Optionally, the scheduling information about the PDSCH includes two schemes:

[0196] In scheme A, the scheduling information of PDSCH is scheduled by PDCCH, that is, PDCCH indicates the scheduling information of PDSCH. Based on this scheme, N PDSCHs can be indicated by M PDCCHs. If the scheduling information of N PDSCHs is the same, then the information carried by M PDCCHs is the same, and M is an integer greater than 1 or equal to 1.

[0197] Solution B: The scheduling information of the PDSCH is scheduled by other information other than the PDCCH, that is, the other information other than the PDCCH indicates the scheduling information of the PDSCH. Based on this solution, the network device may not send the PDCCH corresponding to the PDSCH.

[0198] The two solutions are introduced below in combination with method 600 and method 1000 respectively.

[0199] First, combine Figure 6 Introducing Plan A.

[0200] See also Figure 6 , Figure 6 It is a schematic diagram of a communication method 600 provided in another embodiment of the present application. Figure 6 The illustrated method 600 may include the following steps.

[0201] 610. The network device sends N SSBs.

[0202] Wherein, N is an integer greater than 1.

[0203] 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 through one beam. It is understood that the indexes of the N SSBs may be different.

[0204] 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 part of the N SSBs.

[0205] 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 information carried by the M PDCCHs is the same.

[0206] Correspondingly, 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.

[0207] Wherein, M is an integer greater than 1 or equal to 1. As an example, M is less than N or equal to N.

[0208] For the system information and time window, please refer to the relevant description in method 500, which will not be repeated here.

[0209] The candidate time position of the PDCCH (system frame, subframe, time slot, or OFDM symbol) can be determined according to a preset relationship (for example, a relationship with the SSB) and / or the indication information in the main system information, and can refer to Figure 3 The corresponding methods will not be described in detail.

[0210] 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, which can also be understood as M PDCCHs including the scheduling information (or configuration information) of N PDSCHs, and the N PDSCHs include the 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.

[0211] 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).

[0212] Optionally, the information carried by each of the M PDCCHs includes at least one of the following information: MCS, TDRA, FDRA, RV, NDI, resource mapping mode, and DMRS symbol position. Among them, the at least one item of information is information corresponding to the system information, that is, information of the PDSCH carrying the system information. It can be understood that the position indicated in TDRA and FDRA is a relative position, and the specific description can be referred to in the previous method 500, which will not be repeated here.

[0213] The following introduces two solutions based on the value of M.

[0214] Scheme 1, M=1.

[0215] 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 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 one PDCCH.

[0216] Through this solution 1, the PDCCH contents of system information corresponding to multiple SSBs are concentrated together, thereby improving transmission performance. Specifically, the PDCCH contents of system information corresponding to multiple SSBs are scheduled through one PDCCH, and the code length is increased. By increasing the code length, the coding gain can be improved. In addition, the PDCCH contents of system information corresponding to multiple SSBs are scheduled through one PDCCH, which reduces the cyclic redundancy check (CRC) overhead.

[0217] See also Figure 7 , Figure 7 Figure 1 is a schematic diagram of SSB and system information transmission applicable to Scheme 1. To distinguish, 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. Figure 7 As shown, the system information corresponding to N SSBs is carried in N PDSCHs, and the N PDSCHs are scheduled by one PDCCH.

[0218] Scheme 2, M>1.

[0219] M>1, that is, the system information corresponding to N SSBs (or N beams, or N SSB beams) corresponds to at least 2 PDCCHs, and the information carried by the at least 2 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.

[0220] Through this solution 2, the information carried by the M PDCCHs is the same, 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.

[0221] See also Figure 8 , Figure 8 Figure 2 is a schematic diagram of SSB and system information transmission applicable to Scheme 2. To distinguish, 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. Figure 8 As shown, the system information corresponding to N SSBs is carried in N PDSCHs, and the N PDSCHs are scheduled by M PDCCHs. Figure 8 In the example shown, M=N.

[0222] See also Fig. 9 , Fig. 9 FIG. 2 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. Fig. 9 As shown, the system information corresponding to N SSBs is carried in N PDSCHs, and the N PDSCHs are scheduled by M PDCCHs. Fig. 9In the example shown, M is less than N, that is, among the system information corresponding to N beams, the system information corresponding to at least 2 SSBs corresponds to one PDCCH. Fig. 9 In the example shown, as an example, the system information corresponding to SSB#0 and SSB#1 corresponds to one PDCCH.

[0223] Optionally, the method 600 further includes: the network device sends indication information #1 (i.e., an example of the first indication information) to the terminal device, where the indication information #1 indicates a value of N. In this way, the terminal device can determine the value of N based on the indication of the network device, thereby facilitating the terminal device to know how to jointly receive several SSBs.

[0224] In a first possible implementation, the indication information #1 is SSB. Based on this implementation, the value of N can be indicated by SSB.

[0225] 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.

[0226] For another example, indication information #1 is the MIB in the SSB.

[0227] In a second possible implementation, the indication information #1 is DMRS. Based on this implementation, the value of N can be indicated by DMRS, which can facilitate the terminal device to perform combined detection on N SSBs. In addition, since DMRS detection has high reliability and low complexity, the detection performance of the terminal device can be improved.

[0228] 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.

[0229] For another example, indication information #1 is a DMRS corresponding to the PDCCH. For ease of description, a DMRS used for demodulating the PDCCH (or, a DMRS in the PDCCH) may be referred to as a DMRS corresponding to the PDCCH.

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

[0231] The following introduces 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).

[0232] For example, different DMRS sequences correspond to different values ​​of N, that is, 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, the corresponding relationship is called corresponding relationship #1), and the terminal device can know the value of N based on the DMRS sequence and corresponding relationship #1.

[0233] As an example, correspondence #1 may exist in the form of a table, function, text, or string, such as for storage or transmission. Table 1 below is an example of presenting correspondence #1 in table form.

[0234] Table 1

[0235] DMRS sequence N DMRS sequence #1 N1 DMRS sequence #2 N2 DMRS sequence #3 N3

[0236] 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.

[0237] It can be understood that Table 1 is an example and is not limited to this. Any variation of Table 1 is applicable to the embodiments of the present application. For example, the DMRS sequence in Table 1 can also be replaced by the index of the DMRS sequence, that is, it can be a correspondence between the index (or identifier) ​​that can identify the DMRS sequence and the value of N. For another example, Table 1 can include more or fewer values ​​of N and DMRS sequences.

[0238] Optionally, the value of N is one of 2, 4, 6, and 8. It can be understood that this is an exemplary description and is not limited to this. For example, the value of N can also be other values. For example, N is the number of SSBs actually sent, 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.

[0239] The indexes of the N SSBs are different, and regarding the N SSBs, the following implementation methods may be included.

[0240] In the first possible implementation, N SSBs are adjacent in time. In this way, the impact of channel time variability on performance can be reduced, thereby facilitating the terminal device to jointly receive the PDCCH of system information corresponding to multiple SSBs.

[0241] 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.

[0242] 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 represented by: SSB#0, SSB#1, SSB#2, SSB#3 occupy four consecutive time domain units.

[0243] The second possible implementation is that the indexes of the N SSBs are adjacent. In this way, the impact of channel time variability on performance can be reduced, thereby facilitating the terminal device to jointly receive the PDCCH of system information corresponding to multiple SSBs.

[0244] Among them, the indexes of the N SSBs are adjacent, which means that the indexes of two adjacent SSBs among the N SSBs are adjacent, that is, the N SSBs are adjacent or continuous N SSBs.

[0245] In a third possible implementation, N SSBs are evenly spaced in time, which is helpful to shorten the average access time.

[0246] Among them, the N SSBs are evenly spaced in time, indicating that the time domain resource intervals occupied by two adjacent SSBs among the N SSBs are the same.

[0247] 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.

[0248] A fourth possible implementation is to evenly space the indexes of the N SSBs, which is helpful in shortening the average access time.

[0249] 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.

[0250] For example, assuming N=4, the N SSBs are indexed in ascending order: 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.

[0251] 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.

[0252] 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.

[0253] Among them, if indication information #2 indicates whether the information carried by 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.

[0254] 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.

[0255] It can be understood that the specific content indicated by indication information #2 is not limited in the embodiment of the present application, and any solution that can enable the terminal device to determine whether to jointly receive M PDCCHs based on indication information #2 is applicable to the embodiment of the present application. The following mainly uses indication information #2 indicating whether to jointly receive M PDCCHs as an example for explanation.

[0256] In one example, the indication information #2 is SSB. Based on this implementation, SSB can be used to indicate whether to jointly receive M PDCCHs.

[0257] For example, indication information #2 is PBCH in SSB.

[0258] For another example, indication information #2 is the MIB in the SSB.

[0259] In another example, the indication information #2 is DMRS. Based on this implementation, DMRS can be used to indicate whether to jointly receive M PDCCHs, which can facilitate the terminal device to determine whether to jointly receive N SSBs. In addition, since DMRS detection has high reliability and low complexity, the detection performance of the terminal device can be improved.

[0260] For example, indication information #2 is the DMRS corresponding to the PDCCH.

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

[0262] The following introduces the implementation method of indicating that the information #2 is DMRS (such as DMRS corresponding to SSB, and such as DMRS corresponding to PDSCH).

[0263] 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.

[0264] 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.

[0265] Table 2

[0266] DMRS sequence Whether to jointly receive M PDCCHs DMRS sequence #1 Do not receive M PDCCHs jointly DMRS sequence #2, DMRS sequence #3 Joint reception of M PDCCHs

[0267] Taking Table 2 as an example, indication information #2 is a 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 can be understood that Table 2 is an example and is not limited to this. Any variation of Table 2 is applicable to the embodiments of the present application. For example, the DMRS sequence in Table 2 can also be replaced by the index of the DMRS sequence. For another example, Table 2 can include a greater number or a lesser number of DMRS sequences.

[0269] In another example, the indication information #2 is implemented by at least one bit. For example, it is assumed that 1 bit is used to indicate whether to jointly receive M PDCCHs. If the bit is set to "1", it means that the M PDCCHs are jointly received; if the bit is set to "0", it means that the M PDCCHs are not jointly received. It should be understood that the above is only an exemplary description 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 the terminal device jointly receives M PDCCHs, and if the joint reception succeeds within the preset time length, it is determined that the M PDCCHs can be jointly received; if the reception fails within the preset time length, it is determined that the M PDCCHs cannot be jointly received, and thus the joint reception can be stopped. The preset time length may be pre-configured, or pre-defined by a protocol, or pre-agreed by the network device and the terminal device, and is not limited thereto.

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

[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 redundant version index of each PDSCH is related to its corresponding SSB index. In this way, since the indexes of different SSBs are different, the redundant version indexes of each PDSCH are different. Different redundant version indexes of each PDSCH can improve the benefits of joint reception.

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

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

[0281] As 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] As 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 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 that N SSBs correspond to N PDSCHs, and the redundancy versions of each PDSCH are the same. In this case, the redundancy versions of each PDSCH are the same, and the scheduling information of each PDSCH is exactly the same. In this way, a simpler and more efficient joint reception can be achieved. For example, based on the maximum ratio combining method, joint reception of PDSCHs between multiple SSBs can be achieved, which improves the transmit diversity gain and performance.

[0287] The above introduces the related solutions of Plan A, and the following introduces Plan B.

[0288] See also Fig.10 , Fig.10 It is a schematic diagram of a communication method 1000 provided in another embodiment of the present application. Fig.10 The illustrated method 1000 may include the following steps.

[0289] 1010. The network device sends at least one indication information #3, where 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] For 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 the reception performance. For this solution, reference may be made 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 receiving N PDSCHs does not limit the terminal device to receiving N PDSCHs. The terminal device receiving N PDSCHs 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, the transmission of system information can be done without PDCCH, that is, the scheduling information of PDSCH can be scheduled by other information other than PDCCH, and does not need to be scheduled through PDCCH, so the network equipment does not need to send PDCCH. In this way, the resources originally used to transmit PDCCH are now used to transmit PDSCH, thereby improving coverage.

[0297] See also Fig.11 , Fig.11 Schematic diagram of SSB and system information transmission without PDCCH transmission applicable to the embodiment of the present application. 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. Fig.11 As shown, the system information corresponding to N beams is carried in N PDSCHs. In this process, PDCCH is not sent.

[0298] The following describes the relevant solutions regarding 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 indicates scheduling information of N PDSCHs, that is, one indication information #3 indicates scheduling information of one PDSCH.

[0301] Optionally, indication information #3 is SSB and / or DMRS. For ease of description, several implementations are mainly introduced below, mainly taking solution 2 as an example.

[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 the 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, the indication information #3 is SSB and DMRS. Based on this implementation, the scheduling information of the PDSCH can be jointly indicated by SSB and DMRS, that is, part of the scheduling information of the PDSCH 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, scheduling information of PDSCH is divided into two parts, one part of scheduling information is carried in PBCH, and the other part of scheduling information is carried in 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 that 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, suppose there are 4 candidate MCSs, which are recorded as MCS#0, MCS#1, MCS#2, and MCS#3 for distinction, and 2 bits are used to indicate the MCS of PDSCH. For example, if the 2 bits are set to "00", it means that the MCS of PDSCH is MCS#0; if the 2 bits are set to "01", it means that the MCS of PDSCH is MCS#1; if the 2 bits are set to "10", it means that the MCS of PDSCH is MCS#2; if the 2 bits are set to "11", it means that the MCS of PDSCH is MCS#3.

[0311] Optionally, the scheduling information of PDSCH includes frequency domain resource allocation, and the frequency domain resource allocation of PDSCH is associated with the position of 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 frequency domain resources of the PDSCH is associated with the start position of the frequency domain resources of the SSB 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 frequency domain resources of the PDSCH according to the start position of the frequency domain resources of the SSB 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 known 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, the 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] As 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 the reliability of DMRS detection is relatively high and the complexity is relatively low, 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 introduces the implementation method of indicating that the 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), and 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] DMRS sequence Is there a PDCCH to send? DMRS sequence #1 PDCCH is sent DMRS sequence #2, DMRS sequence #3 No PDCCH is sent

[0327] Taking Table 3 as an example, indication information #4 is a DMRS sequence. If the DMRS sequence is DMRS sequence #1, indication information #4 indicates that PDCCH is sent; if the DMRS sequence is DMRS sequence #2 or DMRS sequence #3, indication information #4 indicates that no PDCCH is sent.

[0328] It can be understood that Table 3 is an example and is not limited to this. Any variation of Table 3 is applicable to the embodiments of the present application. For example, the DMRS sequence in Table 3 can also be replaced by the index of the DMRS sequence. For another example, Table 3 can include a greater number or a smaller number of DMRS sequences.

[0329] In another example, indication information #4 is implemented by at least one bit. For example, it is assumed that 1 bit is used to indicate whether a PDCCH is sent. If the bit is set to "1", it indicates that a PDCCH is sent; if the bit is set to "0", it indicates that no PDCCH is sent. It should be understood that the above is only an exemplary description and is not limiting.

[0330] It is understood that the above indication of whether there is a PDCCH transmission through indication information #4 is an example and is not limited to this. For example, the terminal device can also detect whether there is a PDCCH by itself. For example, if the terminal device does not detect the PDCCH within a preset time, it is assumed that there is no PDCCH transmission. For another example, if the terminal device receives indication information #3, it is assumed that there is no PDCCH transmission.

[0331] 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, which will not be described in detail here.

[0332] The indexes of the N SSBs are different, and regarding the N SSBs, the following implementation methods may be included.

[0333] In a first possible implementation, N SSBs are adjacent in time.

[0334] In a second possible implementation, the indexes of the N SSBs are adjacent.

[0335] In a third possible implementation, the N SSBs are evenly spaced in time.

[0336] In a fourth possible implementation, the indexes of the N SSBs are evenly spaced.

[0337] For the above four possible implementation methods, please refer to the relevant description in method 600, which will not be repeated here.

[0338] 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 refer to the relevant description in method 600, which is not repeated here.

[0339] For ease of understanding, a specific process is introduced below by taking SSB as an example. The contents not described in detail below can refer to the descriptions in method 500, method 600, and method 1000, and will not be repeated below.

[0340] See also Fig.12 , Fig.12 It is a schematic flowchart of a communication method 1200 provided according to an embodiment of the present application. Fig.12 The illustrated method 1200 may include the following steps.

[0341] 1210. The network device sends N SSBs to the terminal device.

[0342] Wherein, N is an integer greater than 1.

[0343] The network device sends system information corresponding to N SSBs to the terminal device.

[0344] In one possible implementation, 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 600. At this time, method 1200 also includes steps 1220 and 1230.

[0345] 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.

[0346] 1220. The network device sends M PDCCHs to the terminal device.

[0347] Among them, M PDCCHs are used to schedule 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.

[0348] 1230. The network device sends N PDSCHs to the terminal device, where the N PDSCHs include system information corresponding to N SSBs.

[0349] Accordingly, the terminal device jointly receives N PDSCHs, and thereby obtains at least one piece of system information.

[0350] Specifically, if method 1200 includes step 1220 and step 1230, the terminal device can determine the 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.

[0351] Specifically, if method 1200 includes step 1230 but does not include step 1220, the terminal device may determine the scheduling information of N PDSCHs based on indication information #3, and then jointly receive N PDSCHs based on the determined scheduling information of N PDSCHs. As an example, indication information #3 is SSB and / or DMRS. For details, please refer to the relevant description in method 1000.

[0352] 1240. The terminal device transmits signals with the network device based on the at least one system information.

[0353] Signal transmission is performed between the terminal device and the network device. For example, the initial access process is completed so that the UE can access the network normally; or the cell switching is completed; or the beam management process is completed, etc.

[0354] It can be understood that in each embodiment of the present application, the interaction between a terminal device and a network device is mainly used as an example for illustrative description, but the present application is not limited to this. The terminal device can be replaced by a receiving device, which can be a terminal device or a network device; the network device can be replaced by a sending device, which can be a terminal device or a network device.

[0355] It can also be understood that in some of the above embodiments, it is mentioned that the terminal device receives N PDSCHs. As mentioned above, it does not limit the terminal device to receive 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 way in which the terminal device determines whether to jointly receive N PDSCHs is not limited.

[0356] For example, the terminal device may be able to jointly receive N PDSCHs by default.

[0357] 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.

[0358] As an example, the indication information #5 may be the indication information #2 mentioned above, and the details may refer to the above description.

[0359] 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.

[0360] In another example, the indication information #5 is implemented by at least one bit. For example, it is assumed that 1 bit is used to indicate whether N PDSCHs can be jointly received. If the bit is set to "1", it means that N PDSCHs are jointly received; if the bit is set to "0", it means that N PDSCHs are not jointly received. It should be understood that the above is only an exemplary description and is not limiting.

[0361] It can also be understood that some optional features in the embodiments of the present application may not depend on other features in some scenarios, or may be combined with other features in some scenarios, without limitation.

[0362] It can also be understood that the solutions in the various embodiments of the present application can be used in reasonable combination, and the explanations or descriptions of the various terms appearing in the embodiments can be mutually referenced or explained in the various embodiments, without limitation.

[0363] 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.

[0364] Above, combined Figures 5 to 12 The method provided by the embodiment of the present application is described in detail. Figures 13 to 15 The device provided in the embodiment of the present application is described in detail. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment, so the contents not described in detail can be referred to the method embodiment above, and for the sake of brevity, they are not described here.

[0365] See also Fig.13 , Fig.13 1 is a schematic diagram of a communication device 1300 provided in an embodiment of the present application. The device 1300 includes a transceiver unit 1310. The transceiver unit 1310 can be used to implement corresponding communication functions. The transceiver unit 1310 can also be called a communication interface or a communication unit. Optionally, the device 1300 also includes a processing unit 1320. The processing unit 1320 can be used to perform processing, such as determining a resource pattern.

[0366] Optionally, the device 1300 may further include a storage unit, which may be used to store instructions and / or data, and the processing unit 1320 may read the instructions and / or data in the storage unit so that the device implements the aforementioned method embodiment.

[0367] In a first possible design, the device 1300 may be a network device (such as Figure 5 Network devices in Figure 6 Network devices in Fig.10 Network devices in Fig.12 The device 1300 can implement the steps or processes performed by the network device in the above method embodiment. The transceiver unit 1310 can be used to perform the operations related to transceiving of the network device in the above method embodiment (such as the operations of sending and / or receiving data or messages), and the processing unit 1320 can be used to perform the operations related to processing of the network device in the above method embodiment, or operations other than transceiving (such as operations other than sending and / or receiving data or messages).

[0368] In a possible implementation, the transceiver unit 1310 is used to send N synchronization signals, where N is an integer greater than 1; the transceiver unit 1310 is further used to send M physical downlink control channels PDCCH, where the M PDCCHs are used to schedule the N synchronization signals or the system information corresponding to the N beams, the system information corresponding to the N synchronization signals or the N beams is the system information sent in the same time window, the M PDCCHs carry the same information, and M is an integer greater than 1 or equal to 1. Optionally, the processing unit 1320 is used to determine the M PDCCHs.

[0369] Optionally, 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.

[0370] 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.

[0371] 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.

[0372] Optionally, the redundancy version of each PDSCH in the N PDSCHs is the same.

[0373] Optionally, the transceiver unit 1310 is further used to send first indication information, where the first indication information indicates a value of N.

[0374] 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.

[0375] Optionally, the value of N is any of the following: 2, 4, 6, or 8.

[0376] 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.

[0377] 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.

[0378] Optionally, the N synchronization signals satisfy any 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.

[0379] In a second possible design, the device 1300 may be the terminal device (eg, Figure 5 The terminal device in Figure 6 The terminal device in Fig.10 The terminal device in Fig.12 The device 1300 can implement the steps or processes performed by the terminal device in the above method embodiment. The transceiver unit 1310 can be used to perform the operations related to the transceiver of the terminal device in the above method embodiment (such as the operations of sending and / or receiving data or messages), and the processing unit 1320 can be used to perform the operations related to the processing 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).

[0380] In a possible implementation, the transceiver unit 1310 is used to receive N synchronization signals, where N is an integer greater than 1; the transceiver unit 1310 is further used to receive M physical downlink control channels PDCCH, where the M PDCCHs are used to schedule the N synchronization signals or the 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 in the same time window, and the M PDCCHs carry the same information, where M is an integer greater than 1 or equal to 1. Optionally, the processing unit 1320 is used to determine the M PDCCHs.

[0381] Optionally, 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.

[0382] 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.

[0383] 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.

[0384] Optionally, the redundancy version of each PDSCH in the N PDSCHs is the same.

[0385] Optionally, the transceiver unit 1310 is further used to receive first indication information, where the first indication information indicates a value of N.

[0386] 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.

[0387] Optionally, the value of N is any of the following: 2, 4, 6, or 8.

[0388] 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.

[0389] Optionally, the processing unit 1320 is configured to determine joint reception of M PDCCHs.

[0390] 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.

[0391] Optionally, the N synchronization signals satisfy any 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.

[0392] 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.

[0393] It should also be understood that the device 1300 here is embodied in the form of a functional unit. The term "unit" here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a proprietary processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a merged logic circuit and / or other suitable components that support the described functions. In an optional example, those skilled in the art can 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, it will not be repeated here.

[0394] The device 1300 of each of the above schemes has the function of implementing the corresponding steps performed by the communication device in the above method. The function can be implemented by hardware, or by hardware executing the corresponding software implementation. The hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending 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.

[0395] 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.

[0396] It should be pointed out that Fig.13 The device in the embodiment may be a communication device in the foregoing embodiment, or may be a chip or a 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 or a microprocessor or an integrated circuit integrated on the chip. This is not limited here.

[0397] See also Fig.14 , Fig.14 1 is a schematic diagram of another communication device 1400 provided in an embodiment of the present application. The device 1400 includes a processor 1410, the processor 1410 is coupled to a memory 1420, the memory 1420 is used to store computer programs or instructions and / or data, and the processor 1410 is used to execute the computer programs or instructions stored in the memory 1420, or read the data stored in the memory 1420, so as to execute the methods in the above method embodiments.

[0398] Optionally, there are one or more processors 1410 .

[0399] Optionally, the memory 1420 is one or more.

[0400] Optionally, the memory 1420 is integrated with the processor 1410 or provided separately.

[0401] Alternatively, if Fig.14 As shown, the device 1400 further includes a transceiver 1430, which is used to receive and / or send signals. For example, the processor 1410 is used to control the transceiver 1430 to receive and / or send signals.

[0402] As an example, the processor 1410 may have Fig.13The processing unit 1320 shown in FIG. 1 may have the function of a storage unit, the memory 1420 may have the function of a storage unit, and the transceiver 1430 may have the function of a Fig.13 The functions of the transceiver unit 1310 are shown in FIG.

[0403] As a solution, the device 1400 is used to implement the operations performed by the communication device in each of the above method embodiments.

[0404] 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.

[0405] It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or 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. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0406] 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).

[0407] 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.

[0408] 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.

[0409] See also Fig.15 , Fig.15 1 is a schematic diagram of a chip system 1500 provided in 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 .

[0410] Among them, the logic circuit 1510 can be a processing circuit in the chip system 1500. The logic circuit 1510 can be coupled to the storage unit and call the instructions in the storage unit so that the chip system 1500 can implement the methods and functions of each embodiment of the present application. The input / output interface 1520 can be an input / output circuit in the chip system 1500, outputting information processed by the chip system 1500, or inputting data or signaling information to be processed into the chip system 1500 for processing.

[0411] 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 method embodiments.

[0412] 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.

[0413] An embodiment of the present application also provides a computer-readable storage medium on which are stored 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.

[0414] For example, when the computer program is executed by a computer, the computer can implement the method executed by a communication device (such as a terminal device, or a network device) in each embodiment of the above method.

[0415] An embodiment of the present application also 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.

[0416] 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 Figure 5 or Figure 6 or Fig.10 or Fig.12 Terminal devices and network devices in.

[0417] 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.

[0418] In the several embodiments provided in the present 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. There may be other division methods in actual implementation, 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.

[0419] 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 devices. 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 a website site, 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 to another website site, computer, server or data center. 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 contains 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 codes, 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.

[0420] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope 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 device, characterized in that: include: A unit for performing the method according to any one of claims 1 to 11, or a unit for performing the method according to any one of claims 12 to 22.

24. A communication device, characterized in that: Comprising a processor, the processor is used to execute a computer program or instruction stored in a memory, so that the communication device performs the method according to any one of claims 1 to 11, or so that the communication device performs the method according to any one of claims 12 to 22.

25. The device according to claim 24, characterized in that The device further comprises the memory and / or the communication interface, wherein the communication interface is coupled to the processor. The communication interface is used to input and / or output information.

26. The device according to any one of claims 23 to 25, characterized in that The device is any one of the following: a communication device, a chip, a chip system, or a circuit.

27. 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.

28. A computer program product, characterized in that The computer program product comprises a computer program or instructions for executing the method according to any one of claims 1 to 11, or the computer program product comprises a computer program or instructions for executing the method according to any one of claims 12 to 22.

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