Communication method and communication apparatus

Abstract

Provided in the present application are a communication method and a communication apparatus. The method comprises: receiving a first reference signal of a first port, wherein the first reference signal comprises a reference signal obtained by performing precoding on the basis of a first precoding matrix, and the first precoding matrix is determined on the basis of a first multi-path parameter of the first port; receiving first indication information, wherein the first indication information indicates the type of a parameter included in the first multi-path parameter, and the type of the parameter included in the first multi-path parameter is used for determining a calculation mode of the first precoding matrix; and on the basis of the first precoding matrix and the first reference signal, performing channel estimation. The type of a parameter included in a multi-path parameter of a first port can be determined by means of first indication information, that is, a calculation mode of a precoding matrix of the first port is determined, such that the precoding matrix of the first port can be determined, and channel estimation is performed by using the precoding matrix and a reference signal processed by the precoding matrix.

Description

Communication method and communication apparatus

[0001] This application claims priority to the Chinese Patent Application No. 202411149961.9, filed on August 20, 2024, and entitled "Communication method and communication apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication, and more particularly, to a communication method and a communication apparatus. BACKGROUND

[0003] Sensing fusion has become a research hotspot as one of the potential key technologies of the next generation mobile communication system. The acquisition of sensing signals can enhance the performance of wireless communication in some aspects, and at the same time, the performance of traditional sensing services can also be improved by using wireless communication systems. For example, based on the characteristics of sensing-assisted communication of the next generation communication system, a multiple-input multiple-output (MIMO) system can potentially achieve more efficient data transmission based on the acquired sensing parameters (such as angle, time delay) without relying on traditional channel state information (CSI) acquisition mechanisms. In this scenario, how to estimate the channel based on the sensing parameters is a problem that needs to be considered. SUMMARY

[0004] The present application provides a communication method and a communication apparatus, which can realize channel estimation based on multipath parameters and improve communication performance.

[0005] In a first aspect, a communication method is provided. The method can be applied to a communication apparatus, which can be a communication device (such as a terminal device), or the communication apparatus can be a component (such as a chip or a chip system or a circuit or a communication module) in a communication device.

[0006] The method includes: receiving a first reference signal of a first port, the first reference signal including a reference signal obtained by precoding based on a first precoding matrix, the first precoding matrix being determined according to a first multipath parameter of the first port; receiving first indication information, the first indication information being used to indicate a type of a parameter included in the first multipath parameter, the type of the parameter included in the first multipath parameter being used to determine a calculation manner of the first precoding matrix; performing channel estimation and data demodulation based on the first precoding matrix and the first reference signal.

[0007] Based on the above scheme, the communication device (referred to as a first communication device for distinction) can determine the type of the parameter included in the first port multipath parameter through the first indication information, that is, determine the calculation method of the precoding matrix of the first port, so that the first communication device can determine the precoding matrix of the first port, and use the precoding matrix and the reference signal processed by the precoding matrix to perform channel estimation and data demodulation.

[0008] In some implementations of the first aspect, the first indication information indicates a TCI-state, the TCI-state indicating that the first reference signal has a quasi co-location (QCL) relationship with a second reference signal, and the TCI-state further indicating the type of the parameter included in the first multipath parameter.

[0009] Based on the above scheme, the type of the parameter included in the first multipath parameter can be indicated by indicating the QCL type in the TCI-state, so that the first device can determine the precoding matrix of the first port, and perform channel estimation and data demodulation based on the first multipath parameter.

[0010] In some implementations of the first aspect, the TCI-state includes a first QCL type, and the first QCL type has a corresponding relationship with the type of the parameter included in the first multipath parameter.

[0011] Based on the above scheme, the type of the parameter included in the first multipath parameter can be indicated by indicating the QCL type in the TCI-state, so that the first device can determine the precoding matrix of the first port, and perform channel estimation and data demodulation based on the first multipath parameter.

[0012] In some implementations of the first aspect, the first QCL type is one of at least one second QCL type, each of the at least one second QCL type corresponding to the type of the parameter included in a multipath parameter, and the type of the parameter included in each of the at least one second QCL type corresponding to a different multipath parameter.

[0013] Based on the above scheme, by defining a new QCL type corresponding to the parameter of the sub-path multipath parameter, the type of the parameter included in the first multipath parameter can be indicated by indicating the QCL type in the TCI-state, so that the first device can determine the precoding matrix of the first port, and perform channel estimation and data demodulation based on the first multipath parameter.

[0014] In some implementations of the first aspect, the first QCL type is one of at least one third QCL type, each of the at least one third QCL type corresponding to parameters including a first type of parameter and a second type of parameter, the first type of parameter being a multipath parameter corresponding to a sub-path, and the second type of parameter being a statistical parameter based on the multipath.

[0015] Based on the above scheme, by adding the multipath parameter of the sub-path in the QCL type, the type of the parameter included in the first multipath parameter can be indicated by indicating the QCL type in the TCI-state, so that the first device can determine the precoding matrix of the first port, and then perform channel estimation and data demodulation based on the first multipath parameter.

[0016] In some implementations of the first aspect, the TCI-state indicates resource configuration information of the second reference signal, the resource configuration information including the type of the parameter included in the first multipath parameter, or the resource configuration information having a corresponding relationship with the type of the parameter included in the first multipath parameter.

[0017] Based on the above scheme, by indicating the resource configuration of the reference signal having the QCL relationship with the first reference signal in the TCI-state, the type of the parameter included in the first multipath parameter can be indicated, so that the first device can determine the precoding matrix of the first port, and then perform channel estimation and data demodulation based on the first multipath parameter.

[0018] In some implementations of the first aspect, the resource configuration information indicates at least one of the following information: density of resources occupied by the reference signal, resources occupied by the reference signal, bandwidth occupied by the reference signal, port multiplexing manner of the reference signal, or transmission period of the reference signal.

[0019] In some implementations of the first aspect, the first precoding matrix is determined based on a value of the parameter included in the first multipath parameter, the value of the parameter included in the first multipath parameter being obtained based on measurement of the second reference signal.

[0020] In some implementations of the first aspect, second indication information is received, the second indication information indicating at least one first index, the at least one first index corresponding to the parameter included in the first multipath parameter in a one-to-one manner, and the first index having a first corresponding relationship with a value of each of the parameters included in the first multipath parameter.

[0021] In some implementations of the first aspect, the first configuration information is received, and the first configuration information is used to configure at least one second correspondence relationship, the at least one second correspondence relationship is one-to-one corresponding to a parameter included in the first multipath parameter, the second correspondence relationship includes a correspondence relationship between a plurality of second indexes and a plurality of value ranges and / or values corresponding to each parameter, and the second correspondence relationship includes the first correspondence relationship.

[0022] Based on the above scheme, by directly indicating the type of the parameter included in the first multipath parameter and the value of each parameter, the first device can determine the precoding matrix of the first port, so that the first device can determine the precoding matrix of the first port, and then perform channel estimation and data demodulation based on the first multipath parameter.

[0023] In some implementations of the first aspect, the multipath parameter includes at least one of the following parameters: angle, time delay, power, Doppler, polarization information, and initial phase.

[0024] In a second aspect, a communication method is provided. The method can be applied to a communication device, which can be a communication equipment (such as a network equipment), or the communication device can be a component (such as a chip or a chip system or a circuit or a communication module) in a communication equipment.

[0025] The method includes: transmitting a first reference signal of a first port, the first reference signal including a reference signal obtained by precoding based on a first precoding matrix, the first precoding matrix being determined according to a first multipath parameter of the first port; and transmitting first indication information, the first indication information being used to indicate a type of a parameter included in the first multipath parameter, the type of the parameter included in the first multipath parameter being used to determine a calculation manner of the first precoding matrix, the first precoding matrix and the first reference signal being used for channel estimation.

[0026] Based on the above scheme, the communication device (referred to as a second communication device for distinction) can make the first communication device determine the type of the parameter included in the first multipath parameter of the first port, i.e., determine the calculation manner of the precoding matrix of the first port, so that the first communication device can determine the precoding matrix of the first port, and perform channel estimation and data demodulation by using the precoding matrix and the reference signal processed by the precoding matrix.

[0027] In some implementations of the second aspect, the first indication information indicates a TCI state (TCI-state), the TCI-state indicates that the first reference signal and a second reference signal have a quasi co-location (QCL) relationship, and the TCI-state further indicates the type of the parameter included in the first multipath parameter.

[0028] In some implementations of the second aspect, the TCI-state includes a first QCL type, and the first QCL type has a correspondence relationship with a type of parameter included in the first multipath parameter.

[0029] In some implementations of the second aspect, the first QCL type is one of at least one second QCL type, each of the at least one second QCL type corresponds to a type of parameter included in a multipath parameter, and the type of parameter included in each of the at least one second QCL type is different.

[0030] In some implementations of the second aspect, the first QCL type is one of at least one third QCL type, each of the at least one third QCL type corresponds to a parameter including a first type of parameter and a second type of parameter, the first type of parameter is a multipath parameter corresponding to a sub-path, and the second type of parameter is a statistical parameter based on a multipath.

[0031] In some implementations of the second aspect, the TCI-state indicates resource configuration information of the second reference signal, the resource configuration information includes a type of parameter included in the first multipath parameter, or the resource configuration information has a correspondence relationship with the type of parameter included in the first multipath parameter.

[0032] In some implementations of the second aspect, the resource configuration information indicates at least one of the following information: density of resources occupied by a reference signal, resources occupied by a reference signal, bandwidth occupied by a reference signal, reference signal port multiplexing mode, or transmission period of a reference signal.

[0033] In some implementations of the second aspect, second indication information is transmitted, the second indication information indicates at least one first index, the at least one first index has a one-to-one correspondence relationship with a parameter included in the first multipath parameter, and the first index has a first correspondence relationship with a value of each parameter included in the first multipath parameter.

[0034] In some implementations of the second aspect, first configuration information is transmitted, the first configuration information is used to configure at least one second correspondence relationship, the at least one second correspondence relationship has a one-to-one correspondence relationship with a parameter included in the first multipath parameter, the second correspondence relationship includes a correspondence relationship between a plurality of second indexes and a plurality of value ranges and / or values corresponding to each parameter, and the second correspondence relationship includes the first correspondence relationship.

[0035] In some implementations of the second aspect, the multipath parameter is described in the first aspect.

[0036] In a third aspect, a communication apparatus is provided. The apparatus includes a transceiver and a processing unit. The transceiver is configured to receive a first reference signal of a first port, the first reference signal including a reference signal precoded based on a first precoding matrix, the first precoding matrix determined according to a first multipath parameter of the first port; and receive first indication information, the first indication information indicating a type of a parameter included in the first multipath parameter, the type of the parameter included in the first multipath parameter used to determine a calculation manner of the first precoding matrix. The processing unit is configured to perform channel estimation based on the first precoding matrix and the first reference signal.

[0037] In some implementations of the third aspect, the first indication information indicates a TCI-state, the TCI-state indicating that the first reference signal has a quasi co-location, QCL, relationship with a second reference signal, and the TCI-state further indicating the type of the parameter included in the first multipath parameter.

[0038] In some implementations of the third aspect, the TCI-state includes a first QCL type, the first QCL type having a corresponding relationship with the type of the parameter included in the first multipath parameter.

[0039] The first QCL type can be described with reference to the implementations of the first aspect.

[0040] In some implementations of the third aspect, the TCI-state indicates resource configuration information of the second reference signal, the resource configuration information including the type of the parameter included in the first multipath parameter, or the resource configuration information having a corresponding relationship with the type of the parameter included in the first multipath parameter.

[0041] The resource configuration information can be described with reference to the implementations of the first aspect.

[0042] In some implementations of the third aspect, the processing unit is specifically configured to determine the first precoding matrix based on a value of the parameter included in the first multipath parameter, the value of the parameter included in the first multipath parameter obtained based on a measurement of the second reference signal.

[0043] In some implementations of the third aspect, the transceiver is further configured to receive second indication information, the second indication information indicating at least one first index, the at least one first index in one-to-one correspondence with the parameter included in the first multipath parameter, and the first index having a first corresponding relationship with a value of each of the parameters included in the first multipath parameter.

[0044] In some implementations of the third aspect, the transceiver is further configured to receive first configuration information, the first configuration information being used to configure at least one second correspondence relationship, the at least one second correspondence relationship being in one-to-one correspondence with the parameters included in the first multipath parameter, the second correspondence relationship including a correspondence relationship between a plurality of second indexes and a plurality of value ranges and / or values corresponding to each parameter, and the second correspondence relationship including the first correspondence relationship.

[0045] The parameters included in the multipath parameter are described with reference to the first aspect.

[0046] In a fourth aspect, a communication apparatus is provided. The apparatus includes a transceiver configured to: transmit a first reference signal of a first port, the first reference signal including a reference signal pre-coded based on a first precoding matrix, the first precoding matrix being determined according to a first multipath parameter of the first port; and transmit first indication information, the first indication information being used to indicate a type of parameters included in the first multipath parameter, the type of parameters included in the first multipath parameter being used to determine a calculation manner of the first precoding matrix, and the first precoding matrix and the first reference signal being used for channel estimation.

[0047] In some implementations of the fourth aspect, the first indication information indicates a TCI-state, the TCI-state indicating that the first reference signal has a quasi co-location, QCL, relationship with a second reference signal, and the TCI-state further indicating the type of parameters included in the first multipath parameter.

[0048] In some implementations of the fourth aspect, the TCI-state includes a first QCL type, and the first QCL type has a correspondence relationship with the type of parameters included in the first multipath parameter.

[0049] The first QCL type can be described with reference to the second aspect.

[0050] In some implementations of the fourth aspect, the TCI-state indicates resource configuration information of the second reference signal, the resource configuration information including the type of parameters included in the first multipath parameter, or the resource configuration information having a correspondence relationship with the type of parameters included in the first multipath parameter.

[0051] The resource configuration information can be described with reference to the second aspect.

[0052] In some implementations of the fourth aspect, second indication information is transmitted, the second indication information indicating at least one first index, the at least one first index being in one-to-one correspondence with the parameters included in the first multipath parameter, and the first index having a first correspondence relationship with a value of each parameter in the parameters included in the first multipath parameter.

[0053] In a certain implementation form of the fourth aspect, the first configuration information is transmitted, the first configuration information being used for configuring at least one second correspondence, the at least one second correspondence being in one-to-one correspondence with the parameters comprised in the first plurality of parameters, the second correspondence comprising a plurality of second indexes and a plurality of value ranges and / or value corresponding relations corresponding to each parameter, the second correspondence comprising the first correspondence.

[0054] The parameters comprised in the plurality of parameters can refer to the description in the second aspect.

[0055] In a fifth aspect, there is provided a communication apparatus, which is configured to perform the method in the first aspect or the second aspect and any possible implementation thereof. Specifically, the apparatus can include units and / or modules for performing the method in the first aspect or the second aspect and any possible implementation thereof, such as a processing unit and / or a communication unit.

[0056] In an implementation form, 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 can be a transceiver, or an input / output interface; and the processing unit can be at least one processor. Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit.

[0057] In another implementation form, the apparatus is a chip, chip system or circuit, or a communication module for a communication device, such as a terminal device, or a network device. When the apparatus is a chip, chip system or circuit for a communication device, the communication unit can be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or related circuitry, etc. on the chip, chip system or circuit; and the processing unit can be at least one processor, a processing circuit or a logic circuit, etc.

[0058] In a sixth aspect, there is provided a communication apparatus, comprising at least one processor configured to cause the apparatus to perform the method in the first aspect or the second aspect and any possible implementation thereof.

[0059] Optionally, the at least one processor is configured to execute computer program or instructions to perform the method in the first aspect or the second aspect and any possible implementation thereof.

[0060] Optionally, the apparatus further comprises a memory configured to store the computer program or instructions.

[0061] Optionally, the at least one processor is coupled to the memory configured to store the computer program or instructions. The memory can be external to the apparatus.

[0062] Optionally, the apparatus further includes a communication interface, and the processor reads the instructions on the memory through the communication interface. It can be understood that the communication interface is coupled with the processor, and is used for inputting the computer program or instructions into the processor, or outputting the information in the processor.

[0063] For the operations of sending, acquiring / receiving and the like involved, if no special description is made, or if it does not contradict the actual role or inherent logic in the related description, it can be understood as the output, input and the like, or the sending and receiving operations performed by the radio frequency circuit and the antenna, and the present application does not limit this.

[0064] In an implementation manner, the apparatus is a communication device (such as a terminal device, or a network device).

[0065] In another implementation manner, the apparatus is a chip, a chip system or a circuit or a communication module for a communication device (such as a terminal device, or a network device). Optionally, the chip is a Modem chip, also known as a baseband chip, or a system on chip (SoC) chip or a system in package (SIP) chip containing a modem core.

[0066] In a seventh aspect, a computer readable storage medium is provided, and the computer readable medium stores a computer program (for example, program code) or instructions, which, when executed on a communication apparatus, causes the communication apparatus to perform the method in the first aspect or the second aspect or any possible implementation manner thereof.

[0067] In an eighth aspect, a computer program product containing instructions is provided, which, when executed on a computer, causes the computer to perform the method in the first aspect or the second aspect or any possible implementation manner thereof.

[0068] In a ninth aspect, a communication system is provided, including a first communication apparatus and a second communication apparatus. The first communication apparatus is configured to perform the method provided in any implementation manner of the first aspect, and the second communication apparatus is configured to perform the method provided in any implementation manner of the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0069] FIG. 1 is a schematic diagram of a wireless communication system suitable for embodiments of the present application.

[0070] FIG. 2 is a schematic diagram of a communication method 200 provided by embodiments of the present application.

[0071] FIG. 3 is a schematic diagram of resource configuration of a reference signal provided by embodiments of the present application.

[0072] FIG. 4 is a schematic diagram of a communication apparatus 1000 according to an embodiment of the present application.

[0073] FIG. 5 is a schematic diagram of another communication apparatus 1100 according to an embodiment of the present application.

[0074] FIG. 6 is a schematic diagram of a chip system 600 according to an embodiment of the present application. DETAILED DESCRIPTION

[0075] The technical solutions in the present application will be described below with reference to the drawings.

[0076] Before introducing the solutions of the present application, the following points are explained.

[0077] 1. In the present application, "indication" can include direct indication, indirect indication, explicit indication, implicit indication, etc. When describing that a certain indication information indicates A, it can be understood that the indication information carries A, carries an identifier of A, carries B having a correlation relationship with A, carries an identifier of B having a correlation relationship with A, etc. In other words, if the receiving side of the certain indication information can determine A according to the indication information, it can be described that the indication information indicates A, and the specific determination manner is not limited. When it is understood that the indication information carries A, "indication" can be replaced by "includes", and at this time, similar to the expression "sending / receiving indication information, the indication information indicates A", it can be replaced by "sending / receiving A".

[0078] In the present application, the information indicated by the indication information is referred to as to-be-indicated information. In the specific implementation process, there are many ways to indicate the to-be-indicated information, for example but not limited to, the to-be-indicated information can be directly indicated, such as the to-be-indicated information itself or an index of the to-be-indicated information, etc. The to-be-indicated information can also be indirectly indicated by indicating other information, where the other information has a correlation relationship with the to-be-indicated information. The to-be-indicated information can also be only indicated in part, and the other part of the to-be-indicated information is known or agreed in advance. For example, the indication of a specific information can also be achieved by means of the arrangement order of each information agreed in advance (for example, a protocol stipulates), thereby reducing the indication overhead to a certain extent. In addition, the to-be-indicated information can be sent as a whole, or can be sent separately in multiple sub-information, and the sending period and / or sending occasion of these sub-information can be the same or different.

[0079] 2、In this application, the expression " / " is used to represent the relationship of "or" between the objects associated in front and back; for example, A / B can represent: A or B. The expression "and / or" is used to represent the relationship of both and and or between the objects associated in front and back; for example, A and / or B can represent the following cases: A exists alone, B exists alone, A and B exist together, wherein A, B can be single or multiple. "At least one of the following" or similar expressions are used to represent any combination of the listed items; for example, at least one of A, B and (or) C can represent the following cases: A exists alone, B exists alone, C exists alone, A and B exist together, B and C exist together, A and C exist together, A, B and C exist together, wherein A, B, C can be single or multiple.

[0080] 3、In this application, "send" and "receive" represent the direction of signal transmission. For example, "sending information to XX" can be understood as the destination of the information being XX, which can include direct transmission through the air interface, or indirect transmission through the air interface by other units or modules. "Receiving information from YY" can be understood as the source of the information being YY, which can include direct reception from YY through the air interface, or indirect reception 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 between devices, such as between network devices and terminal devices, or within a device, such as between components, modules, chips, software modules or hardware modules within a device through a bus, wire or interface.

[0081] 4、In various embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be mutually referenced if there is no special description and logical conflict. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0082] 5、In this application, "first", "second", and "#1", "#2" are only for convenience of description, used to distinguish objects, and do not limit the scope of the embodiments of the present application. It is not used to describe the order or sequence of the characteristics. It should be understood that the objects thus described can be interchanged under appropriate circumstances in order to describe solutions other than the embodiments of the present application.

[0083] 6、In this application, "predefined" can mean standard protocol predefined, or can also mean pre-agreed or pre-negotiated between devices. Among them, "protocol" can refer to standard protocols in the communication field, which can include fourth generation (4 th generation, 4G) network, fifth generation (5th The present application is not limited to the 5G network protocol, the new radio (NR) protocol, the 5.5G network protocol, the 6G network protocol, and the related protocol applied in the future communication system.

[0084] 7. In the present application, the words such as "exemplarily", "for example" and the like are used to represent examples, illustrations or descriptions. Any embodiment or design scheme described as "example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the word "example" is used to present the concept in a specific way.

[0085] 8. In the present application, "of", "corresponding" and "corresponding" can be used interchangeably at times. It should be pointed out that when the distinction is not emphasized, the meanings expressed are consistent.

[0086] 9. The formulas involved in the embodiments of the present application are only exemplary and do not constitute a limitation on the protection scope of the embodiments of the present application. In the process of calculating the above-mentioned various involved parameters, the above-mentioned formulas can also be used for calculation, or calculation based on the deformation of the above-mentioned formulas, or other ways can be used for calculation to meet the results of formula calculation.

[0087] The communication system to which the present application is applicable will be described below.

[0088] The technical solutions provided by the present application can be applied to various communication systems, such as: 5G or new radio (NR) system, long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, etc. The technical solutions provided by the present application can also be applied to future communication systems. The technical solutions provided by the present application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and internet of things (IoT) communication system. The technical solutions provided by the present application can also be applied to non-terrestrial network (NTN) system such as inter-satellite communication and satellite communication.

[0089] 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 a base station. The satellite can act as a base station and also as a terminal device. The satellite can refer to a drone, a hot air balloon, a low earth orbit satellite, a medium earth orbit satellite, a high earth orbit satellite, etc. The satellite can also refer to a non-ground base station or a non-ground device, etc.

[0090] As an example, V2X communication can include vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication, vehicle-to-network (V2N) communication, etc.

[0091] A device in a communication system can send a signal to another device or receive a signal from another device. The signal can include information, signaling, or data, etc. The device can also be replaced by an entity, a network entity, a communication device, a communication module, a node, a communication node, etc. The device is taken as an example for description in embodiments of the present application.

[0092] The terminal device in the embodiments of the present application can be a device or module with corresponding communication functions for accessing the above-mentioned communication system. The terminal device can include various devices with wireless communication functions, which can be used to connect people, things, machines, etc. The terminal device can be widely used in various scenarios, such as cellular communication, D2D, V2X, peer to peer, M2M, MTC, IoT, virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, remote medical treatment, smart power grid, smart furniture, smart office, smart wear, smart transportation, smart city UAV, robot, 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 can be a user equipment (UE) of the 3rd generation partnership project (3GPP) standard, a terminal, a fixed device, a mobile station device or a mobile device, a subscriber unit, a handset, a vehicle-mounted device, a wearable device, a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a wireless data card, a personal digital assistant (PDA), a computer, a tablet computer, a notebook computer, a wireless modem, a handset, 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 quad-copter, or an airplane, etc.), a ship, a remote control device, a smart home device, an industrial device, a transport vehicle with wireless communication function, a communication module, a road side unit (RSU) with terminal function, or a device built-in the above-mentioned device (such as a communication module, a modem or a chip in the above-mentioned device, etc.), or other processing devices connected to the wireless modem.

[0093] It should be understood that in some scenarios, the UE can also be used as a base station. For example, the UE can act as a scheduling entity, which provides sidelink signals between UEs in V2X, D2D or peer to peer scenarios, etc.

[0094] In the embodiments of the present application, the apparatus for implementing the function of the terminal device, i.e., the terminal apparatus, can be a terminal device or an apparatus capable of supporting the terminal device to implement the function, such as a chip system or a chip or a circuit or a communication module (i.e., a communication module performing a communication function), which can be installed in the terminal device. In the embodiments of the present application, the chip system can be composed of a chip or can include a chip and other discrete devices. In addition, program instructions for performing corresponding communication functions can also be configured in the apparatus.

[0095] The network device in the embodiments of the present application can be a device or a module with a corresponding communication function. The network device can be a device for communicating with the terminal device, and the network device can also be referred to as an access network device or a radio access network device, such as a network device, which can be a base station. The network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) for accessing the terminal device to a wireless network. The base station can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmission point, primary station, secondary station, 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 foregoing devices or apparatuses. The base station can also be a mobile switching center and a device assuming a base station function in D2D, V2X, M2M communication, a device assuming a base station function in a future communication system, etc. The base station can support networks of the same or different access technologies. The embodiments of the present application do not limit the specific technologies and specific device forms adopted by the network device.

[0096] A base station can be fixed, or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, with one or more cells moving according to 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.

[0097] In some deployments, the network device mentioned in embodiments of the present application can 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 (CU-CP)) and a user plane CU node (central unit-user plane (CU-UP)), and a DU node.

[0098] In some deployments, a plurality of RAN nodes cooperate to assist a terminal device to implement wireless access, and different RAN nodes respectively implement part of the functions of a base station. For example, a RAN node can be a CU, a DU, a CU-CP, a CU-UP, or a radio unit (RU), etc. The CU and the DU can be separately arranged, or can also be included in the same network element, such as a BBU. The RU can be included in a radio frequency device or a radio frequency unit, such as an RRU, an AAU, or an RRH.

[0099] In different systems, the CU (or CU-CP and CU-UP), DU, or RU can also have different names, but those skilled in the art can understand their meanings. For example, the wireless access network can also be an open radio access network (O-RAN) architecture, in which the CU can also be referred to as an open CU (O-CU), the DU can also be referred to as an open DU (O-DU), the CU-CP can also be referred to as an open CU-CP (O-CU-CP), the CU-UP can also be referred to as an open CU-UP (O-CU-UP), and the RU can also be referred to as an open RU (O-RU). Any of the CU (or CU-CP, CU-UP), DU, and RU in the present application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0100] In the embodiments of the present application, the apparatus for implementing the function of the network device can be a network device, or an apparatus capable of supporting the network device to implement the function, such as a chip system or a chip or a circuit or a communication module (i.e., a communication module performing a communication function), which can be installed in the network device. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices. In addition, program instructions for performing corresponding communication functions can also be configured in the apparatus. In the embodiments of the present application, only the apparatus for implementing the function of the network device is taken as an example of the network device, and the scheme of the embodiments of the present application is not limited.

[0101] The network device and the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on water; and can also be deployed on airplanes, balloons and satellites in the air. The scenarios in which the network device and the terminal device are located are not limited in the embodiments of the present application.

[0102] The following will briefly introduce a communication system suitable for the embodiments of the present application in combination with FIG. 1.

[0103] FIG. 1 is a schematic diagram of a communication system suitable for the embodiments of the present application. As shown in FIG. 1, the communication system includes a radio access network 100. The radio access network 100 can be a next-generation (for example, future or higher version) radio access network, or a traditional (for example, 5G, 4G, 3G or 2G) radio access network. One or more terminal devices (120a-120j, collectively referred to as 120) can be connected to each other or connected to one or more network devices (110a, 110b, collectively referred to as 110) in the radio access network 100. The network elements in the wireless communication system are connected through an interface (for example, NG, Xn), or connected through an air interface.

[0104] In the communication between the network device and the terminal device, the network device can manage one or more cells, and each cell can include at least one terminal device. The cell can be understood as an area within the coverage range of the wireless signal of the network device.

[0105] FIG. 1 is only a schematic diagram, and the wireless communication system can also include other devices, such as core network devices, wireless relay devices and / or wireless backhaul devices, etc., which are not shown in FIG. 1.

[0106] In order to facilitate the understanding of the technical scheme of the present application, some related technologies related to the technical scheme of the present application are introduced.

[0107] 1. Multi-input multi-output (MIMO) technology

[0108] MIMO technology utilizes the resource of spatial dimension, which can make the signal obtain array gain, multiplexing and diversity gain, and interference cancellation gain in space without increasing the system bandwidth, and can multiply the capacity and spectrum efficiency of the communication system. For example, in the LTE system, the MIMO system can support up to 8 layers of transmission at the transmitting end and the receiving end by using multiple antennas.

[0109] 2、port

[0110] The port can also be referred to as an antenna port, which can include a transmitting port and a receiving port. One port can be configured for each virtual antenna, each virtual antenna can be a weighted combination of multiple physical antennas, and each port can correspond to one reference signal.

[0111] The transmitting port can be understood as a virtual antenna identified by the receiving end. The receiving port can be understood as the receiving antenna of the receiving end, and the receiving port can also be understood as a virtual antenna. For example, in downlink transmission, the receiving port can refer to the receiving antenna of the terminal device.

[0112] Optionally, the port refers to the port after beamforming and / or phase rotation.

[0113] In one example, the port refers to the port after beamforming. For example, the reference signal of each port can be a precoded reference signal obtained by precoding the reference signal based on an angle vector. It can be understood that if the reference signal is beamformed, the number of ports can refer to the number of ports of the precoded reference signal. The number of ports of the precoded reference signal can be less than the number of transmitting antenna ports.

[0114] In another example, the port refers to the port after phase rotation. For example, the reference signal of each port can be a precoded reference signal obtained by precoding the reference signal based on a delay vector and transmitting the precoded reference signal through a transmitting antenna port. The port can also be referred to as the port of the precoded reference signal.

[0115] In another example, the port refers to the port after beamforming and phase rotation. For example, the reference signal of each port can be a precoded reference signal obtained by precoding the reference signal based on an angle vector and a delay vector. The port can also be referred to as the port of the precoded reference signal.

[0116] 3、time domain unit and frequency domain unit: data or information can be carried by time-frequency resources.

[0117] In the time domain, a time domain resource can include one or more time domain units (or also can be referred to as time units). A time domain unit can include a radio frame (RF), a subframe, a frame, a half subframe, a half frame, a slot, a mini-slot, a partial slot, or an orthogonal frequency division multiplexing (OFDM) symbol, and the like.

[0118] In the frequency domain, a frequency domain resource can include one or more frequency domain units. A frequency domain unit can include a subcarrier, a component carrier (CC), a resource element (RE), a resource block (RB), a subchannel, a resource pool, a bandwidth, a bandwidth part (BWP), a channel, or an interlace RB, and the like.

[0119] 4. Reference signal (RS)

[0120] A reference signal can refer to a physical signal carrying a sequence sent for a specific function. Specifically, a reference signal is a physical signal generated by mapping a specific sequence to a corresponding resource in a preset resource mapping manner. A reference signal can also be referred to as a pilot, a reference sequence, a reference signal, and the like.

[0121] The reference signal involved in the present application can be any of the following: a channel state information reference signal (CSI-RS), a sounding reference signal (SRS), a demodulation reference signal (DMRS), a phase tracking reference signal (PT-RS), a cell reference signal (CRS), and the like.

[0122] Among them, the DMRS can be used for demodulation of a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH). The CSI-RS can be used for channel information measurement and implementation of reporting of channel state information (CSI) including at least one of the following: precoding matrix indicator (PMI), rank indication (RI), and channel quality indicator (CQI).

[0123] It should be understood that the reference signals listed above are only examples and should not constitute any limitation on 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.

[0124] 5. Quasi-co-location (QCL)

[0125] Or quasi-situation, can be used to define the relationship between antenna ports. Since the antenna port is defined by the reference signal (RS), QCL essentially refers to the relationship between reference signals. One of the reasons for introducing QCL is that reference signals cannot be too dense, so some characteristics may not be able to be measured, so in this case, the corresponding features can be obtained from other reference signals through the QCL relationship, reducing the density of reference signals.

[0126] Signals with QCL relationship have the same parameters, or signals corresponding to antenna ports with QCL relationship have the same parameters, or the parameters of one antenna port can be used to determine the parameters of another antenna port with QCL relationship with the antenna port, or two antenna ports have the same parameters, or the parameter difference between two antenna ports is less than a certain threshold. Among them, the parameters can include one or more of the following: delay spread, doppler spread, doppler shift, average delay, spatial Rx parameters.

[0127] As an example, the QCL relationship can be divided into the following four types based on different parameters: type A, type B, type C, and type D.

[0128] Type A: Doppler shift, Doppler spread, average delay, delay spread.

[0129] As an example, the QCL relationship of type A can be used to obtain channel estimation information, such as including: Doppler shift, Doppler spread, average delay, delay spread, so that the terminal device obtains a comprehensive description of the characteristics of the reference signal (such as a demodulation reference signal (DMRS)) for demodulating the channel.

[0130] Type B: Doppler shift, Doppler spread.

[0131] As an example, the QCL relationship of type B can be used to obtain channel estimation information, such as including: Doppler shift, Doppler spread.

[0132] Type C: Doppler shift, average delay.

[0133] As an example, the QCL relationship of type C can be used to obtain measurement information such as reference signal receiving power (RSRP), integrate Doppler shift and delay characteristics from the reference signal, and used for further accurate time-frequency domain synchronization.

[0134] Type D: spatial reception parameter.

[0135] As an example, the QCL relationship of type D can be used to assist terminal device beamforming, such as the terminal device can use the spatial parameter information obtained from the channel state information reference signal (CSI-RS) that satisfies the QCL relationship to assist the terminal device beamforming, for receiving and demodulating PDCCH and physical downlink shared channel (PDSCH).

[0136] Exemplarily, the spatial reception parameter can comprise one or more of: angle of arrival (AOA), average AOA, AOA spread, angle of departure (AOD), average angle of departure AOD, AOD spread, receive antenna spatial correlation parameter, transmit antenna spatial correlation parameter, transmit beam, receive beam, and resource identity.

[0137] 6. Transmission configuration indicator (TCI) state (TCI-state)

[0138] A TCI-state can be used to indicate the QCL relationship between two reference signals. One TCI-state can be identified by one TCI-state index, in other words, one TCI-state index can uniquely identify one TCI-state.

[0139] A TCI-state comprises several parameters. As an example, each TCI-state comprises one own TCI-state index and at least one QCL information (QCL-Info). Each QCL-Info (or each TCI-state) comprises: a reference signal resource identity (or the identity of the reference signal), and an associated QCL type (qcl-Type) which indicates which type of QCL relationship with which reference signal resource.

[0140] Wherein, the reference signal resource can be used to configure the transmission properties of the reference signal, for example, time-frequency resource location, port mapping relationship, power factor, and scrambling code, etc. The transmitting end can transmit the reference signal based on the reference signal resource, and the receiving end can receive the reference signal based on the reference signal resource. In order to distinguish different reference signal resources, each reference signal resource can correspond to one reference signal resource identity. The reference signal resource identity can be at least one of: non-zero power (NZP) CSI-RS reference signal resource identity (NZP-CSI-RS-ResourceId), non-zero power CSI-RS reference signal resource set identity (NZP-CSI-RS-ResourceSetId), or SSB index (SSB-Index).

[0141] Wherein, the qcl-Type can have four values {typeA, typeB, typeC, typeD}.

[0142] The information of the transmit beam can be indicated by a TCI-state. Each TCI-state includes an index (tci-StateId) of itself and two QCL-Info (for example, qcl-Type1 and qcl-Type2). Each QCL-Info can include a reference signal resource (referenceSignal), indicating that the resource adopting the TCI-state and the reference signal resource included in the QCL-Info form a QCL relationship.

[0143] For example, a TCI-state is configured for resource 1, and the resource included in the QCL-Info included in the TCI-state is resource 2, which indicates that resource 1 and resource 2 are QCL.

[0144] The TCI-state is configured by the network device to each terminal device, and the following is an example of the format of the TCI-state.

[0145] In the subsequent communication process, the terminal device can determine the receive beam based on the TCI-state indicated by the network device, and the network device can determine the transmit beam based on the same TCI-state.

[0146] In addition, the TCI-state can be globally configured. In the TCI-state configured for different cells and different bandwidth parts (bandwidth part, BWP), if the indexes of the TCI-states are the same, the configurations of the corresponding TCI-states are also the same.

[0147] 7、TCI

[0148] The TCI can be used to indicate the TCI-state. In an implementation manner, the network device can configure a TCI-state list for the terminal device through high-layer signaling (such as an RRC message), for example, the network device configures the TCI-state list for the terminal device through the TCI-state addition mode list (tci-StatesToAddModList) in the RRC message. The TCI-state list can include multiple TCI-states, for example, the network device configures up to 64 TCI-states for each BWP in each cell.

[0149] After that, the network device can activate one or more TCI-states through high layer signaling (e.g., media / medium access control (MAC) control element (CE) (MAC CE)). The activated TCI-states are a subset of the TCI-state list configured by the above-mentioned RRC message. For example, the network device activates up to 8 TCI-states, i.e., 8 sets of QCL relationships, for each BWP in each cell.

[0150] The network device can also indicate a selected TCI-state through a TCI field (e.g., 3 bits) in physical layer signaling (e.g., DCI). The DCI can be applicable to the DCI scheduling physical downlink resources.

[0151] Among them, the configuration information of a TCI-state can include the identification of one or two reference signal resources and the associated QCL type. When the QCL relationship is configured as one of types A, B, or C, the terminal device can demodulate the PDCCH or PDSCH according to the indication of the TCI-state. When the QCL relationship is configured as type D, the terminal device can know which transmit beam the network device uses to transmit the signal, and then can determine which receive beam to use to receive the signal according to the beam pairing relationship determined by the channel measurement described above. The terminal device can determine the receive beam for receiving the PDSCH according to the TCI field in the DCI on the physical downlink control channel (PDCCH).

[0152] 8. Sensing-aided communication

[0153] Sensing fusion has become a research hotspot as one of the potential key technologies of the next generation of mobile communication systems. The acquisition of sensing signals can enhance the performance of communication in some aspects, and at the same time, the performance of traditional sensing services can also be improved by using wireless communication systems.

[0154] For example, based on the characteristics of sensing-aided communication of the next generation of communication systems, the MIMO system can achieve more efficient data transmission based on the acquired sensing parameters without relying on traditional CSI acquisition mechanisms. As an example, the sensing parameters include multipath parameters such as the angle, time delay, power, polarization, Doppler, and phase of the multipath.

[0155] Exemplarily, when the above-mentioned parameters are fully utilized by the MIMO algorithm to achieve performance enhancement, the potential gain can be reflected in the following two aspects:

[0156] (1) Saving the resource overhead of channel acquisition and data demodulation reference signals;

[0157] (2) Simplify the CSI acquisition and data transmission process, and alleviate the problems of large transmission delay, complex configuration mechanism, and the like caused by the CSI acquisition process and the radio resource control (RRC) and downlink control information (DCI) pilot configuration.

[0158] In the scenario of perception-assisted communication, how to implement channel estimation based on the multipath parameters is a problem to be considered. For example, in this scenario, the network device can perform precoding on the reference signals of each port based on the multipath parameters of the sub-paths corresponding to each port. The precoding can correspond to multiple ways, that is, the network device can perform preprocessing on the reference signals of each port based on multiple precoding manners; the terminal device can perform channel estimation based on the precoding manner of the network device side. In this case, how to make the precoding manners of the network device and the terminal device consistent is a problem to be considered.

[0159] Therefore, the present application provides a communication method and a communication device, which can implement channel estimation based on multipath parameters.

[0160] The communication method provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments provided by the present application can be applied to the scenario shown in the above-mentioned figure, without limitation.

[0161] FIG. 2 is a schematic diagram of a communication method 200 provided by an embodiment of the present application. In order to facilitate description, the terminal device and the network device are exemplarily described below. The terminal device can be replaced by a component (such as a chip or a chip system or a circuit or a communication module) of the terminal device, and the network device can be replaced by a component (such as a chip or a chip system or a circuit or a communication module) of the network device. In addition, the steps described below executed by a single execution subject can also be divided into steps executed by multiple execution subjects, which can be logically and / or physically separated. The method 200 shown in FIG. 2 can include the following steps.

[0162] The method 200 includes S220 and S240. Optionally, the method 200 includes S210, S230, S250, and S260. These steps will be introduced respectively below.

[0163] S210, the network device acquires the multipath parameters.

[0164] Exemplarily, the multipath parameter can represent relevant information of each path when a signal is transmitted through a wireless channel, such as a multipath component parameter of a transmitting antenna, and / or a multipath component parameter of a receiving antenna. The multipath parameter can also be referred to as multipath information, or multipath component (MPC) information.

[0165] The multipath parameter can include at least one of the following information: an angle, a delay. Optionally, the multipath parameter further includes information such as a power, a polarization, an initial phase, and a Doppler.

[0166] The angle can further include at least one of the following: a horizontal dimension angle of arrival (AOA), a horizontal dimension angle of departure (AOD), a vertical dimension zenith of arrival (ZOA), and a vertical dimension zenith of departure (ZOD). The AOA and the ZOA respectively refer to the horizontal and vertical dimensions of the angle of arrival of a signal via a sub-path of a wireless channel to a receiving antenna; the AOD and the ZOD respectively refer to the horizontal and vertical dimensions of the angle of departure of a signal via a sub-path from a transmitting antenna.

[0167] Exemplarily, the network device can obtain the multipath parameter in any of the following ways.

[0168] In one example, the network device obtains the multipath parameter through a sensing system. For example, through scanning of the environment by the sensing system, information of all possible targets in the environment can be obtained, which can include but is not limited to information such as a departure angle, a delay, and a power of the target. The target in the sensing system can refer to a sensed object. The information of one target can correspond to one multipath parameter.

[0169] In another example, the network device obtains the multipath parameter based on historical data of the channel. For example, historical channel samples are obtained through measurement by the network device and / or reporting by a terminal device, and the multipath parameters that can exist are extracted from the historical channel samples.

[0170] In another example, the network device obtains the multipath parameter based on channel estimation based on a reference signal.

[0171] For example, the network device can measure an uplink channel according to an uplink reference signal such as an SRS, and estimate a downlink channel according to the uplink channel, so as to determine an angle (i.e., an angle vector) and a delay (i.e., a delay vector) for downlink transmission (such as reference signal transmission).

[0172] In this application, the “multipath parameter” can also be replaced by “channel information” without limitation.

[0173] Optionally, the method further comprises: determining, by the network device, the L sub-paths based on the obtained multipath parameters, L being a positive integer.

[0174] The L sub-paths can be understood as main sub-paths available for signal transmission in the current environment. In the present application, the sub-paths can be replaced by sub-path clusters, paths, paths, path clusters, etc., without limitation.

[0175] In one possible implementation, the network device determines the L sub-paths based on the correlation between the sub-paths.

[0176] For example, the network device can determine the L sub-paths according to the size relationship between the correlation between the feature information of the sub-paths and the correlation threshold.

[0177] As shown in formula (1).

[0178] wherein V i represents the feature information of the i-th sub-path, e.g., a feature vector, V j represents the feature information of the j-th sub-path, c represents the sub-path set in the determination dimension, and Δ represents the correlation threshold. For ease of description, the i-th sub-path is referred to as sub-path i, and the j-th sub-path is referred to as sub-path j.

[0179] In combination with formula (1), in the case where the correlation between the sub-path i and the sub-path j is less than the correlation threshold, the sub-path i and the sub-path j can be selected as the L sub-paths; otherwise, one of the sub-path i and the sub-path j can be selected as the L sub-paths, or the sub-path i and the sub-path j are not selected as the sub-paths included in the L sub-paths.

[0180] It should be understood that the correlation described in the foregoing can be replaced by an index representing the similarity or correlation degree between different sub-paths, such as similarity, cosine similarity, etc., without limitation.

[0181] In another possible implementation, the network device determines the L sub-paths based on the power of the sub-paths.

[0182] For example, the network device can determine the L sub-paths according to the size relationship between the power of the sub-paths and the first power. As shown in formula (2).

[0183] wherein Power i represents the power value of the sub-path i, P benchmark represents the first power, which can be the power value of the main path, and xdB represents the power threshold. It should be understood that the main path can be understood as the sub-path with the largest power value, or can also be understood as the sub-path with the largest power intensity, without limitation.

[0184] In combination with formula (2), in a case where the ratio of the power of the sub-radiation i to the first power is greater than the power threshold, the sub-radiation i is selected as belonging to the L sub-radiations; otherwise, the sub-radiation i is not selected as belonging to the L sub-radiations.

[0185] The above power can be replaced by an index representing the power intensity characteristic of the sub-radiation, such as amplitude, energy, etc.; in addition, the ratio in formula (2) can also be replaced by a difference value, for example, when the variable is in a logarithmic domain, the ratio in formula (2) can be replaced by a difference value, which is not limited.

[0186] It should be understood that the above manner of determining the L sub-radiations is only an example, and the application does not limit the manner of determining the L sub-radiations, for example, the L sub-radiations can also be determined based on the correlation and power of the sub-radiations.

[0187] It should also be understood that in the present application, the port and the sub-radiation are in a one-to-one correspondence. For example, the correspondence between the port and the sub-radiation can be configured for the communication device (such as a terminal device or a network device), such as the correspondence between the port index and the sub-radiation index, or the correspondence can be predefined by a protocol or indicated by signaling, which is not limited.

[0188] Optionally, the method further includes: determining, by the network device, the first correspondence.

[0189] The first correspondence can indicate the value and / or value range of the corresponding multi-path parameter of each of the L sub-radiations. For example, the L sub-radiations include a sub-radiation i, and the multi-path parameters include: angle, time delay, power, polarization, initial phase, and Doppler. The first correspondence can indicate the value and / or value range of each of the above multi-path parameters corresponding to the sub-radiation i.

[0190] In a possible implementation, the first correspondence includes the value of the multi-path parameter corresponding to each of the L sub-radiations.

[0191] For example, the first correspondence can include at least one correspondence #1, and the at least one correspondence #1 corresponds to at least one parameter included in the multi-path parameter. That is, one correspondence #1 corresponds to one of the at least one parameter, and the one correspondence #1 includes the value of the one parameter corresponding to each of the L sub-radiations. For example, the multi-path parameter includes time delay and Doppler, one correspondence #1 includes the value of the time delay corresponding to each of the L sub-radiations; another correspondence #1 includes the value of the Doppler corresponding to each of the L sub-radiations.

[0192] It should be understood that the application does not limit the form of the correspondence relationship, for example, the form of the correspondence relationship is a table. The first correspondence relationship can include multiple tables (multiple tables correspond to the at least one parameter one by one). Each table can include at least one index, the at least one index corresponds to the L sub-paths one by one, and each index in the at least one index can correspond to a value of a multi-path parameter. That is, by indicating a certain index in the table, a value of a certain multi-path parameter corresponding to a certain sub-path can be indicated. The correspondence relationship can also be other forms, such as a list, a string, etc., without limitation.

[0193] In another possible implementation, the first correspondence relationship includes a correspondence relationship between N sub-path groups and a value range and / or a value of the multi-path parameter, N being a positive integer.

[0194] Wherein, the N sub-path groups can be obtained by grouping the L sub-paths, each sub-path group can include at least one sub-path in the L sub-paths, and the sub-paths included in each sub-path group can be different, or in other words, each sub-path corresponds to a sub-path group, and different sub-paths correspond to different sub-path groups. For example, the sub-paths with the obtained multi-path parameter deviation less than the threshold value can be divided into a sub-path group. Each sub-path group corresponds to a value range and / or a value (reference value) of the multi-path parameter.

[0195] For example, the first correspondence relationship can include at least one correspondence relationship #2, and the at least one correspondence relationship #2 corresponds to at least one parameter included in the multi-path parameter one by one. For example, the multi-path parameter includes a delay and a Doppler, one correspondence relationship #2 includes a value range and / or a value of the delay corresponding to each sub-path group in the N sub-path groups; another correspondence relationship #2 includes a value range and / or a value of the Doppler corresponding to each sub-path group in the N sub-path groups.

[0196] For example, the form of the correspondence relationship #2 is a table. Each table can include at least one index. Each index in the at least one index corresponds to a value range and / or a value (reference value) of a parameter. Optionally, each index can correspond to a sub-path group. That is, by indicating a certain index in the table, a value range and / or a value of a certain multi-path parameter corresponding to a certain sub-path group can be indicated. The correspondence relationship #2 is shown in Table 1 or Table 2, the correspondence relationship #2 shown in Table 1 corresponds to the delay; and the correspondence relationship #2 shown in Table 2 corresponds to the Doppler.

[0197] Table 1

[0198] Table 2

[0199] It should be understood that the correspondence between the above sub-paths (sub-path groups) and the values or value ranges of the multipath parameters is only an example and does not constitute a limitation on the present application.

[0200] In S220, the network device sends the first reference signal of the first port to the terminal device. Correspondingly, the terminal device receives the first reference signal of the first port.

[0201] The first reference signal can be a reference signal obtained by precoding based on a first precoding matrix. The first precoding matrix is determined according to the multipath parameters (denoted as first multipath parameters) of the first port.

[0202] Optionally, the first reference signal is not precoded by the first precoding matrix.

[0203] The first port can include P ports, each of the P ports can correspond to a sub-path, and P is a positive integer. The sub-paths corresponding to the P ports can belong to the above L sub-paths.

[0204] It should be understood that in the present application, the port and the sub-path are in a one-to-one correspondence. “Port” and “sub-path” can be replaced with each other, for example, when the following refers to “port or port (corresponding) information”, “port or port (corresponding) information” can be replaced with “sub-path or sub-path (corresponding) information”, and the following will take “port” as an example to illustrate the scheme of the embodiments of the present application.

[0205] For example, the network device determines the first precoding matrix based on the first multipath parameters obtained in S210, or determines the first precoding matrix based on the reference value of the multipath parameters corresponding to the sub-path group to which the first port (corresponding sub-path) belongs; the network device performs precoding processing on the reference signal of the first port based on the first precoding matrix to obtain the first reference signal.

[0206] The calculation method of the first precoding matrix is related to the type of the parameters included in the first multipath parameters.

[0207] For example, the first multipath parameters include angle, time delay, and the first multipath parameters correspond to category #1, and the category of the first multipath parameters corresponds to the calculation method #1 of the precoding matrix.

[0208] For another example, the first multipath parameters include angle, time delay, and power, and the first multipath parameters correspond to category #2, and the category of the first multipath parameters corresponds to the calculation method #2 of the precoding matrix.

[0209] For another example, the first multipath parameters include angle, time delay, power, and phase, and the first multipath parameters correspond to category #3, and the category of the first multipath parameters corresponds to the calculation method #3 of the precoding matrix.

[0210] It should be understood that the above classification of the types of parameters included in the first multipath parameter is only an example and does not limit the present application, and the types of parameters included in the first multipath parameter can also be other combinations of parameters.

[0211] In other words, the first multipath parameter can be a group of multipath parameters in a plurality of groups of multipath parameters, each group of multipath parameters in the plurality of groups of multipath parameters includes different types of parameters, each group of multipath parameters can correspond to a category of multipath parameters, and different groups of multipath parameters correspond to different categories of multipath parameters; each group of multipath parameters can correspond to a calculation method of a precoding matrix.

[0212] In the present application, the "type of parameter included in the multipath parameter" and the "category of multipath parameter" can be replaced with each other, and the "category of multipath parameter" is described below.

[0213] In S230, the network device sends first indication information to the terminal device. Correspondingly, the terminal device receives the first indication information.

[0214] The first indication information can be used to indicate the category of the first multipath parameter.

[0215] In a possible implementation, the first indication information indicates a first TCI-state, the first TCI-state indicates that the first reference signal has a QCL relationship with a second reference signal, and the first TCI-state also indicates the category of the first multipath parameter.

[0216] For example, the network device can configure a TCI-state list for the terminal device through high-layer signaling (such as RRC signaling). The TCI-state list can include a plurality of TCI-states; the network device can activate one or more TCI-states through high-layer signaling (such as MAC CE, an example of the first indication information). The activated TCI-state (an example of the first TCI-state) is a subset of the TCI-state list configured by the above-mentioned RRC message, the activated TCI-state indicates that the first reference signal has a QCL relationship with a second reference signal, and the TCI-state indicates the category of the first multipath parameter. The second reference signal is, for example, a CSI-RS or an SSB.

[0217] The manner in which the network device indicates the first TCI-state is not limited, for example, the network device can also indicate one or more selected TCI-states (an example of the first TCI-state) through a TCI field (another example of the first indication information) in physical layer signaling (such as DCI). The specific description can be found in the existing related description.

[0218] Specifically, the first TCI-state can indicate the category of the first multipath parameter in the following examples.

[0219] Example #1, the first TCI-state includes a first QCL type, the first QCL type has a corresponding relationship with the category of the first multipath parameter.

[0220] In an implementation manner, the first QCL type is one of at least one second QCL type.

[0221] The second QCL type can be a newly defined QCL type. The second QCL type corresponding parameter can be a multipath parameter of a subpath.

[0222] For example, the existing protocol defines that the QCL type includes four types: typeA, typeB, typeC, and typeD, each QCL type corresponds to a set of parameters, and specific descriptions can be referred to the existing related descriptions. Different from the QCL type defined in the existing protocol, the second QCL type can be a newly defined QCL type, for example, the QCL type can further include typeE, typeF, typeG, and the like, each newly defined QCL type can correspond to a category of a multipath parameter, for example, typeE can correspond to an angle and a delay; typeF can correspond to an angle, a delay, and a power; and typeG can correspond to an angle, a delay, a power, and a phase.

[0223] It should be understood that the above second QCL type and the corresponding relationship between the second QCL type and the category of the multipath parameter are only examples and do not constitute a limitation on the present application, for example, the second QCL type can further include more or less QCL types, and each QCL type corresponding multipath parameter category can also be other.

[0224] In another implementation manner, the first QCL type is one of at least one third QCL type.

[0225] The third QCL type corresponding parameter includes a first type parameter and a second type parameter. The first type is a type of parameter included in the multipath parameter, or in other words, the first type parameter is a multipath parameter corresponding to a subpath; the second type can be an existing parameter type, for example, the second type parameter is a parameter corresponding to the existing typeA, typeB, typeC, and typeD. The second type parameter is a statistical parameter based on the multipath.

[0226] As an example, the third QCL type can be an existing QCL type; the second type of parameters corresponds to the parameters of each QCL type, for example, when the third QCL type is typeA, the second type of parameters can include Doppler shift, Doppler spread, average delay, and delay spread. That is, the parameters corresponding to the third QCL type include the first type of parameters and the second type of parameters can be understood as: adding deterministic multipath parameters in the parameters corresponding to the existing QCL type, and the category of the multipath parameters added in each existing QCL type can be different, and the category of the multipath parameters with different determinations corresponds to different calculation methods of the precoding matrix. For example, power and initial phase can be added in typeA; polarization information, power and Doppler can be added in typeB.

[0227] The above correspondence between the third QCL type and the category of the multipath parameter is only an example, and the application does not limit the category of the multipath parameter corresponding to each QCL type.

[0228] That is, in this implementation, by obtaining the existing QCL type included in the first TCI state, the category of the first multipath parameter can be known.

[0229] Example #2, the first TCI-state indicates the resource configuration information of the second reference signal, and the resource configuration information of the second reference signal includes the type of the parameters included in the first multipath parameter, or the resource configuration information of the second reference signal has a corresponding relationship with the type of the parameters included in the first multipath parameter.

[0230] Among them, the resource configuration information can be used to configure the resource occupied by the reference signal, or in other words, the resource configuration information can indicate the resource configuration mode of the reference signal. The resource configuration information corresponding to reference signals of different ports can be different. The resource configuration information can indicate at least one of the following information:

[0231] The density of the resource occupied by the reference signal, the resource occupied by the reference signal, the bandwidth occupied by the reference signal, the port multiplexing mode of the reference signal, or the transmission period of the reference signal.

[0232] Among them, the density of the resource occupied by the reference signal can include the density of the frequency domain resource occupied by the reference signal (or frequency domain density) and the density of the time domain resource occupied by the reference signal (or time domain density); the resource occupied by the reference signal can indicate the position of the frequency domain unit or the time domain unit position mapped by the reference signal; the port multiplexing mode of the reference signal can include frequency division multiplexing, code division multiplexing, time division multiplexing, or composite multiplexing (simultaneous existence of at least two of frequency division multiplexing, code division multiplexing, and time division multiplexing).

[0233] In one example, the frequency domain density and / or time domain density of the second reference signal can be as shown in FIG. 3(a), FIG. 3(b) or FIG. 3(c). As shown in FIG. 3, the second reference signal can support mapping of frequency domain resources with a minimum RB granularity, mapping of time domain resources with a minimum symbol (or slot) granularity, and mapping of resources across symbols (or slots).

[0234] The type of the multipath parameter corresponding to each resource configuration manner can be different. For example, the resource configuration manner of FIG. 3(a) can correspond to a type of multipath parameter, such as the multipath parameter including delay, angle; the resource configuration manner shown in FIG. 3(b) can correspond to another type of multipath parameter, such as the multipath parameter including delay, angle, Doppler, etc.

[0235] The above examples are only for illustration, and the present application does not limit the specific type of the multipath parameter corresponding to the resource configuration manner.

[0236] That is, in the case where the resource configuration information of the reference signal and the type of the multipath parameter have a corresponding relationship, the terminal device can determine the type of the first multipath parameter based on the resource configuration information of the second reference signal indicated by the TCI state, so as to determine the calculation manner of the first precoding matrix.

[0237] Optionally, the method further includes determining the first precoding matrix based on the values of the parameters included in the first multipath parameter.

[0238] The values of the parameters included in the first multipath parameter are obtained based on the measurement of the second reference signal. That is, the terminal device can determine the resource carrying the second reference signal according to the resource configuration information of the second reference signal indicated in the first QCL state, and measure the values of the parameters in the first multipath parameter based on the second reference signal.

[0239] That is, the terminal device can determine the calculation manner of the first precoding matrix according to the first indication information, and determine the first precoding matrix according to the values of the first multipath parameter obtained by measuring the second reference signal.

[0240] In another possible implementation, the first indication information indicates the type of the first multipath parameter by indicating the first corresponding relationship (described in reference to S210).

[0241] In an example, the network device knows a first correspondence relationship, the first correspondence relationship including at least one correspondence relationship #1 corresponding to at least one parameter included in the multipath parameter in a one-to-one manner and / or at least one correspondence relationship #2 corresponding to the at least one parameter in a one-to-one manner. The network device can indicate the category of the first multipath parameter by indicating the correspondence relationship #1 or the correspondence relationship #2 used by the terminal device.

[0242] The first correspondence relationship can be configured in the terminal device. For example, the network device can send first configuration information to the terminal device, the first configuration information being used to configure the first correspondence relationship. The first correspondence relationship can also be predefined or indicated by signaling, without limitation.

[0243] Optionally, the method further includes: the network device sending second indication information to the terminal device, the second indication information indicating the value and / or value range of each parameter corresponding to the first sub-path (i.e., the sub-path corresponding to the first port), the each parameter being each parameter included in the first multipath parameter.

[0244] For example, in the case where the correspondence relationship #1 corresponding to each parameter is configured, the second indication information indicates an index (an example of at least one first index) in each correspondence relationship #1 of the at least one correspondence relationship #1 (corresponding to the at least one parameter in a one-to-one manner), the sub-path corresponding to the index being the first sub-path, and the value of the parameter corresponding to the first index being the value of the parameter included in the first multipath parameter.

[0245] For example, in the case where the correspondence relationship #2 corresponding to each parameter is configured, the second indication information indicates an index (an example of at least one first index) in each correspondence relationship #2 of the at least one correspondence relationship #2 (corresponding to the at least one parameter in a one-to-one manner), the sub-path group corresponding to the index being the sub-path group to which the first sub-path belongs, and the reference value of the parameter corresponding to the first index being the value of the parameter included in the first multipath parameter.

[0246] That is, the terminal device can determine the calculation manner of the first precoding matrix according to the first indication information, and determine the value of the first multipath parameter according to the second indication information, so as to determine the first precoding matrix.

[0247] Based on the above scheme, in the case where the environment of the perception-assisted communication is stable, the network device can maintain the multipath parameter corresponding to each sub-path, and can perform precoding processing on the reference signal based on the multipath parameter, and the network device can make the terminal device determine the precoding matrix based on the multipath parameter by indicating the multipath parameter corresponding to each sub-path to the terminal device, so as to perform subsequent channel estimation.

[0248] Optionally, the network device can maintain multiple sets of the first correspondence relationship for different environments, so that the precoding processing can correspond to the environment information. Optionally, when the environment changes, the network device can also instruct the terminal device to trigger updating of the first correspondence relationship, i.e., updating the values of the multipath parameters corresponding to each sub-path. For example, the first correspondence relationship is updated based on measurement of the reference signal, which is not limited.

[0249] S240, the terminal device performs channel estimation based on the first precoding matrix and the first reference signal.

[0250] For example, the terminal device determines the category of the first multipath parameter according to the first indication information, and determines the calculation manner of the first precoding matrix, and the terminal device determines the first precoding matrix according to the value of the first multipath parameter obtained by measuring the second reference signal or indicated by the second indication information; the terminal device performs channel estimation based on measurement of the first reference signal and the first precoding matrix. The specific implementation of channel estimation can refer to the related description in the prior art.

[0251] It should be understood that, in this application, if the first reference signal is a reference signal that has not been precoded by the first precoding matrix, the category of the first multipath parameter indicated by the first indication information can be used to assist in channel estimation and data demodulation. For example, the terminal device determines the category of the first multipath parameter, and obtains the value of the first multipath parameter based on measurement of the second reference signal (or determines the value of the first multipath parameter based on the second indication information); the terminal device can construct channel estimation filter coefficients (such as using time delay to design frequency filter coefficients, using Doppler to design time domain filter coefficients, etc.) and MIMO detection coefficients based on the first multipath parameter, so as to perform channel estimation and data demodulation. In this case, the step can be replaced by: the terminal device performs channel estimation and data demodulation based on the first multipath parameter and the first reference signal.

[0252] It can be understood that each step in the above figure is only an example and is not strictly limited. In addition, the size of the serial number of each process does not mean the order of execution, and the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the application.

[0253] It can also be understood that some optional features in the embodiments of the application can not depend on other features in some scenarios, or can be combined with other features in some scenarios, which are not limited.

[0254] It is also understood that the methods implemented by the sending device (the first communication apparatus) or the receiving device (the second communication apparatus) in the above method embodiments can also be implemented by components (for example, chips or circuits) of the device, without limitation.

[0255] The method embodiments provided by the present application are described in detail above in combination with FIG. 4 to FIG. 6. The apparatus embodiments of the present application are described below in combination with FIG. 4 to FIG. 6. It can be understood that, in order to implement the functions in the above embodiments, the apparatus in FIG. 4 to FIG. 6 includes corresponding hardware structures and / or software modules for performing various functions. Those skilled in the art should easily realize that, in combination with the units and method steps of the examples described in the embodiments disclosed in the present application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. It can be understood that the technical features described in the above method embodiments are also applicable to the following apparatus embodiments.

[0256] FIG. 4 to FIG. 6 are structural schematic diagrams of possible apparatuses provided by the embodiments of the present application. These apparatuses can be used to implement the functions of the terminal device (the first communication apparatus) or the network device (the second communication apparatus) in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments.

[0257] FIG. 4 is a schematic block diagram of a communication apparatus 1000 provided by the embodiments of the present application. As shown in FIG. 4, the apparatus 1000 can include a communication unit 1010 and a processing unit 1020. The communication unit 1010 can communicate with the outside, and the processing unit 1020 is configured to perform data processing. The communication unit 1010 can also be referred to as a communication interface or a transceiver unit.

[0258] In a possible design, the apparatus 1000 can implement the steps or procedures corresponding to those performed by the terminal device (the first communication apparatus) in the above method embodiments, in which the processing unit 1020 is configured to perform processing-related operations of the terminal device in the above method embodiments, and the communication unit 1010 is configured to perform sending-related operations of the terminal device in the above method embodiments.

[0259] In another possible design, the apparatus 1000 can implement the steps or procedures corresponding to those performed by the network device (the second communication apparatus) in the above method embodiments, in which the communication unit 1010 is configured to perform receiving-related operations of the network device in the above method embodiments, and the processing unit 1020 is configured to perform processing-related operations of the network device in the above method embodiments.

[0260] It can be understood that the apparatus 1000 in this embodiment is embodied in the form of functional units. The term "unit" in this embodiment can refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (for example, a shared processor, a dedicated processor, or a group processor and the like) and a memory for executing one or more software or firmware programs, a combination of logical circuit and / or other suitable components supporting the described functions. In an optional example, those skilled in the art can understand that the apparatus 1000 can be embodied as the sending end device in the above-mentioned embodiments, and can be used to execute the various processes and / or steps corresponding to the sending end device in the above-mentioned method embodiments, or the apparatus 1000 can be embodied as the receiving end device in the above-mentioned embodiments, and can be used to execute the various processes and / or steps corresponding to the receiving end device in the above-mentioned method embodiments. To avoid repetition, details are not described here.

[0261] The apparatus 1000 in each of the above-mentioned schemes has a function of implementing the corresponding steps performed by the terminal device in the above-mentioned methods, or the apparatus 1000 in each of the above-mentioned schemes has a function of implementing the corresponding steps performed by the network device in the above-mentioned methods. The function can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the communication unit can be replaced by a transceiver (for example, the sending unit in the communication unit can be replaced by a transmitter, and the receiving unit in the communication unit can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor, which respectively performs the transceiving operations and related processing operations in each of the method embodiments.

[0262] In addition, the above-mentioned communication unit can also be a transceiving circuit (for example, can include a receiving circuit and a sending circuit), and the processing unit can be a processing circuit. In the embodiments of the present application, the apparatus in FIG. 4 can be a terminal device or a network device in the above-mentioned embodiments, or can be a chip or a chip system, for example, a system on chip (SoC). Wherein, the communication unit can be an input / output circuit, a communication interface; and the processing unit is a processor or a microprocessor integrated on the chip or an integrated circuit. This is not limited here.

[0263] FIG. 5 is a schematic block diagram of a communication apparatus 1100 provided by the embodiments of the present application. The apparatus 1100 includes a processor 1110 and a transceiver 1120. Wherein, the processor 1110 and the transceiver 1120 communicate with each other through an internal connection path, and the processor 1110 is used to execute instructions to control the transceiver 1120 to send and / or receive signals.

[0264] Optionally, the apparatus 1100 further includes a memory 1130, which is in communication with the processor 1110 and the transceiver 1120 via the internal connection path. The memory 1130 is used to store instructions, which the processor 1110 can execute. In one possible implementation, the apparatus 1100 is configured to implement the procedures and steps corresponding to the terminal device (the first communication apparatus) in the above-described method embodiments. In another possible implementation, the apparatus 1100 is configured to implement the procedures and steps corresponding to the network device (the second communication apparatus) in the above-described method embodiments.

[0265] Optionally, the memory 1130 can be integrated in the processor 1110.

[0266] In one possible scenario, the apparatus 1100 includes at least one processor integrated with a memory, and other memory in addition to the memory integrated in the processor.

[0267] It can be understood that the apparatus 1100 can be specifically the terminal device or the network device in the above-described embodiments, and can also be a chip or a chip system. Correspondingly, the transceiver 1120 can be a transceiver circuit of the chip, which is not limited here. Specifically, the apparatus 1100 can be configured to execute the procedures and steps corresponding to the terminal device or the network device in the above-described method embodiments.

[0268] Optionally, the memory 1130 can include a read-only memory and a random access memory, and provide instructions and data to the processor. The memory can include a non-volatile random access memory. For example, the memory can also store device type information. The processor 1110 can be configured to execute the instructions stored in the memory, and when the processor 1110 executes the instructions stored in the memory, the processor 1110 is configured to execute the procedures and steps of the above-described method embodiments corresponding to the terminal device or the network device.

[0269] In the implementation process, the procedures of the above-described method can be completed by the integrated logic circuit of the hardware in the processor or the instructions in the form of software. The procedures of the method according to the embodiments of the present application can be directly embodied as being completed by a hardware processor, or completed by a combination of hardware and software modules in the processor. The software modules can be located in a storage medium in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically programmable read-only memory, a register, or the like. The storage medium is located in the storage, and the processor reads information in the storage medium and combines the hardware to complete the procedures of the above-described method. To avoid repetition, it will not be described in detail here.

[0270] It should be noted that the processor in the embodiments of the present application can be an integrated circuit chip with a signal processing capability. In the implementation process, the steps of the method embodiments described above can be completed by the integrated logic circuit or the software form of instructions in the processor. The processor described above can be a general purpose processor, a digital signal processor (DSP), an ASIC, a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The processor in the embodiments of the present application can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. The general purpose processor can be a microprocessor or the processor can also be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as a hardware code processor for execution, or be executed by a combination of hardware and software modules in the code processor. The software module can be located in a random access memory, a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register or other mature storage medium in the art. The storage medium is located in the storage, and the processor reads the information in the storage, and combines the hardware to complete the steps of the above method.

[0271] It is to be understood that the memory in the embodiments of the present application can be a volatile memory or a nonvolatile memory, or can include both volatile and nonvolatile memory. Among them, the nonvolatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM) used as an external cache. By way of example, and not limitation, many forms of RAM can be used, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the system and method described herein is intended to include, but not be limited to, these and any other suitable types of memory.

[0272] Optionally, the memory (e.g. 1130) in the embodiments of the present application can be integrated in the processor (e.g. 1110).

[0273] FIG. 6 is a schematic diagram of a chip system 600 provided by an embodiment of the present application. The chip system 600 (or also referred to as a processing system) includes a logic circuit 610 and an input / output interface 620.

[0274] Among them, the logic circuit 610 can be a processing circuit in the chip system 600. The logic circuit 610 can be coupled to a storage unit, call instructions in the storage unit, so that the chip system 600 can implement the methods and functions of the embodiments of the present application. The input / output interface 620 can be an input / output circuit in the chip system 600, output the information processed by the chip system 600, or input the data or signaling information to be processed by the chip system 600 for processing.

[0275] As an option, the chip system 600 is configured to implement operations performed by a communication apparatus (e.g., a terminal device, or a network device) in various method embodiments described above.

[0276] For example, the logic circuit 610 is configured to implement processing-related operations performed by a communication apparatus (e.g., a terminal device, or a network device) in various method embodiments described above; and the input / output interface 620 is configured to implement sending- and / or receiving-related operations performed by a communication apparatus (e.g., a terminal device, or a network device) in various method embodiments described above.

[0277] In addition, the present application also provides a computer-readable storage medium having computer instructions stored therein, which, when executed on a computer, cause operations and / or procedures performed by a terminal device (a first communication apparatus) or a network device (a second communication apparatus) in various method embodiments described above to be performed.

[0278] The present application also provides a computer program product, which includes computer program codes or instructions, which, when executed on a computer, cause operations and / or procedures performed by a terminal device (a first communication apparatus) or a network device (a second communication apparatus) in various method embodiments described above to be performed.

[0279] In addition, the present application also provides a chip including a processor. A memory for storing computer programs is provided independently of the chip, and the processor is configured to execute the computer programs stored in the memory, so that operations and / or processes performed by a terminal device (a first communication apparatus) or a network device (a second communication apparatus) in any one of the method embodiments are performed.

[0280] Further, the chip can also include a communication interface. The communication interface can be an input / output interface, or an interface circuit, etc. Further, the chip can also include a memory.

[0281] In addition, the present application also provides a communication system including a terminal device (a first communication apparatus) or a network device (a second communication apparatus) in embodiments of the present application.

[0282] It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable type of memory.

[0283] Those skilled in the art can appreciate that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized in electronic hardware or in a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application. Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described here. In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the above-described device embodiments are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms. The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment. In addition, each functional unit in the embodiments of the present application can be integrated in one processing unit, or each unit can be physically present, or two or more units can be integrated in one unit.

[0284] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the part of the technical solutions that essentially contribute to the prior art or the part of the technical solutions can be embodied in the form of a software product, which is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disk, and various storage medium that can store program codes.

[0285] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A communication method characterized by comprising: The method comprises: receiving a first reference signal of a first port, the first reference signal comprising a reference signal pre-coded based on a first pre-coding matrix, the first pre-coding matrix being determined according to a first multi-path parameter of the first port; receiving first indication information, the first indication information being used to indicate a type of a parameter included in the first multi-path parameter, the type of the parameter included in the first multi-path parameter being used to determine a calculation manner of the first pre-coding matrix; performing channel estimation based on the first pre-coding matrix and the first reference signal.

2. The method of claim 1, wherein, The first indication information indicates a transmission configuration indication (TCI) state, the TCI state indicating that the first reference signal has a quasi co-location (QCL) relationship with a second reference signal, and the TCI state further indicating the type of the parameter included in the first multi-path parameter.

3. The method of claim 2, wherein, The TCI state comprises a first QCL type, and the first QCL type has a corresponding relationship with the type of the parameter included in the first multi-path parameter.

4. The method of claim 3, wherein, The first QCL type is one of at least one second QCL type, each second QCL type of the at least one second QCL type corresponding to a type of a parameter included in a multi-path parameter, and the type of the parameter included in each second QCL type corresponding to the multi-path parameter being different.

5. The method of claim 3, wherein, The first QCL type is one of at least one third QCL type, each third QCL type of the at least one third QCL type corresponding to a parameter including a first type of parameter and a second type of parameter, the first type of parameter being a multi-path parameter corresponding to a sub-path, and the second type of parameter being a statistical parameter based on a multi-path.

6. The method of claim 2, wherein, The TCI state indicates resource configuration information of the second reference signal, The resource configuration information includes the type of the parameter included in the first multi-path parameter, or the resource configuration information has a corresponding relationship with the type of the parameter included in the first multi-path parameter.

7. The method of claim 6, wherein, The resource configuration information indicates at least one of the following information: density of resources occupied by a reference signal, resources occupied by a reference signal, bandwidth occupied by a reference signal, port multiplexing manner of a reference signal, and transmission period of a reference signal.

8. The method according to any one of claims 2 to 7, characterized in that, The method further comprises: determining the first pre-coding matrix based on a value of the parameter included in the first multi-path parameter, the value of the parameter included in the first multi-path parameter being obtained based on measurement of the second reference signal.

9. The method of claim 3, wherein, The method further comprises: receiving second indication information, the second indication information indicating at least one first index, the at least one first index corresponding to the parameter included in the first multi-path parameter in a one-to-one manner, and the first index having a first corresponding relationship with a value of each parameter in the parameter included in the first multi-path parameter.

10. The method of claim 9, wherein, The method further comprises: receive first configuration information, the first configuration information being used for configuring at least one second correspondence relationship, the at least one second correspondence relationship corresponding to a parameter included in the first multipath parameter in one-to-one manner, the second correspondence relationship including a plurality of second indexes and a plurality of value ranges and / or values corresponding to each parameter, and the second correspondence relationship including the first correspondence relationship.

11. The method according to any one of claims 1 to 10, characterized in that, The multipath parameter includes at least one of the following parameters: angle, time delay, power, Doppler, polarization information, and initial phase.

12. A communication method characterized by comprising: comprise: transmit a first reference signal of a first port, the first reference signal including a reference signal pre-coded based on a first precoding matrix, the first precoding matrix being determined according to a first multipath parameter of the first port; transmit first indication information, the first indication information being used for indicating a type of a parameter included in the first multipath parameter, the type of the parameter included in the first multipath parameter being used for determining a calculation manner of the first precoding matrix, and the first precoding matrix and the first reference signal being used for channel estimation.

13. The method of claim 12, wherein, The first indication information indicates a transmission configuration indication (TCI) state (TCI-state), the TCI-state indicating that the first reference signal has a quasi co-location (QCL) relationship with a second reference signal, and the TCI-state further indicating the type of the parameter included in the first multipath parameter.

14. The method of claim 13, wherein, The TCI-state includes a first QCL type, and the first QCL type has a corresponding relationship with the type of the parameter included in the first multipath parameter.

15. The method of claim 14, wherein, The first QCL type is one of at least one second QCL type, each second QCL type in the at least one second QCL type corresponding to a type of a parameter included in a multipath parameter, and the type of the parameter included in each second QCL type corresponding to the multipath parameter being different.

16. The method of claim 14, wherein, The first QCL type is one of at least one third QCL type, each third QCL type in the at least one third QCL type corresponding to a parameter including a first type of parameter and a second type of parameter, the first type of parameter being a multipath parameter corresponding to a sub-path, and the second type of parameter being a statistical parameter based on a multipath.

17. The method of claim 13, wherein, The TCI-state indicates resource configuration information of the second reference signal, The resource configuration information includes the type of the parameter included in the first multipath parameter, or the resource configuration information has a corresponding relationship with the type of the parameter included in the first multipath parameter.

18. The method of claim 17, wherein, The resource configuration information indicates at least one of the following information: density of resources occupied by a reference signal, resources occupied by a reference signal, bandwidth occupied by a reference signal, port multiplexing manner of a reference signal, and transmission period of a reference signal.

19. The method of claim 14, wherein, The method further includes: transmit second indication information, the second indication information indicating at least one first index, the at least one first index corresponding to a parameter included in the first multipath parameter in one-to-one manner, and the first index having a first corresponding relationship with a value of each parameter in the parameter included in the first multipath parameter.

20. The method of claim 19, wherein, The method further includes: transmit first configuration information, the first configuration information being used for configuring at least one second correspondence relationship, the at least one second correspondence relationship corresponding to parameters included in the first multipath parameter one by one, the second correspondence relationship including a plurality of second indexes and a plurality of value ranges and / or value correspondence relationships corresponding to each parameter, and the second correspondence relationship including the first correspondence relationship.

21. The method according to any one of claims 12 to 20, characterized in that, The multipath parameter includes at least one of the following parameters: angle, time delay, power, Doppler, polarization information, and initial phase.

22. A communications device, characterized by comprise a transceiver unit and a processing unit, The transceiver unit is configured to receive a first reference signal of a first port, the first reference signal including a reference signal obtained by precoding based on a first precoding matrix, and the first precoding matrix being determined according to a first multipath parameter of the first port. The transceiver unit is further configured to receive first indication information, the first indication information being used for indicating a type of a parameter included in the first multipath parameter, and the type of the parameter included in the first multipath parameter being used for determining a calculation manner of the first precoding matrix. The processing unit is configured to perform channel estimation based on the first precoding matrix and the first reference signal.

23. The apparatus of claim 22, wherein, The first indication information indicates a transmission configuration indication (TCI) state (TCI-state), the TCI-state indicating that the first reference signal has a quasi co-location (QCL) relationship with a second reference signal, and the TCI-state further indicating the type of the parameter included in the first multipath parameter.

24. The apparatus of claim 23, wherein, The TCI-state includes a first QCL type, and the first QCL type has a correspondence relationship with the type of the parameter included in the first multipath parameter.

25. The apparatus of claim 24, wherein, The first QCL type is one of at least one second QCL type, each second QCL type in the at least one second QCL type corresponding to a type of a parameter included in a multipath parameter, and the type of the parameter included in each second QCL type corresponding multipath parameter being different.

26. The apparatus of claim 24, wherein, The first QCL type is one of at least one third QCL type, each third QCL type in the at least one third QCL type corresponding to parameters including a first type of parameter and a second type of parameter, the first type of parameter being a multipath parameter corresponding to a sub-path, and the second type of parameter being a statistical parameter based on a multipath.

27. The apparatus of claim 23, wherein, The TCI-state indicates resource configuration information of the second reference signal, The resource configuration information includes the type of the parameter included in the first multipath parameter, or the resource configuration information has a correspondence relationship with the type of the parameter included in the first multipath parameter.

28. The apparatus of claim 27, wherein, The resource configuration information indicates at least one of the following information: density of resources occupied by a reference signal, resources occupied by a reference signal, bandwidth occupied by a reference signal, port multiplexing manner of a reference signal, and transmission period of a reference signal.

29. The apparatus of any of claims 23-28, wherein, The processing unit is further configured to: determine the first precoding matrix based on a value of the parameter included in the first multipath parameter, and the value of the parameter included in the first multipath parameter being obtained based on measurement of the second reference signal.

30. The apparatus of claim 24, wherein, The transceiver unit is further configured to: receive second indication information, the second indication information indicating at least one first index, the at least one first index corresponding to each parameter included in the first multipath parameter in a one-to-one manner, and the first index having a first correspondence relationship with a value of each parameter included in the first multipath parameter.

31. The apparatus of claim 30, wherein, The transceiver unit is further configured to: receive first configuration information, the first configuration information being used for configuring at least one second correspondence relationship, the at least one second correspondence relationship corresponding to each parameter included in the first multipath parameter in a one-to-one manner, and the second correspondence relationship including a correspondence relationship between a plurality of second indexes and a plurality of value ranges and / or values corresponding to each parameter, and the second correspondence relationship including the first correspondence relationship.

32. The apparatus of any one of claims 22-31, wherein, The multipath parameter includes at least one of the following parameters: angle, time delay, power, Doppler, polarization information, and initial phase.

33. A communications device, characterized by The transceiver unit is further configured to: The transceiver unit is configured to transmit a first reference signal of a first port, the first reference signal including a reference signal obtained by precoding based on a first precoding matrix, and the first precoding matrix being determined according to a first multipath parameter of the first port; The transceiver unit is further configured to transmit first indication information, the first indication information being used for indicating a type of parameter included in the first multipath parameter, the type of parameter included in the first multipath parameter being used for determining a calculation manner of the first precoding matrix, and the first precoding matrix and the first reference signal being used for channel estimation.

34. The apparatus of claim 33, wherein, The first indication information indicates a transmission configuration indication (TCI) state (TCI-state), the TCI-state indicating that the first reference signal has a quasi co-location (QCL) relationship with a second reference signal, and the TCI-state further indicating the type of parameter included in the first multipath parameter.

35. The apparatus of claim 34, wherein, The TCI-state includes a first QCL type, and the first QCL type has a correspondence relationship with the type of parameter included in the first multipath parameter.

36. The device of claim 35, wherein, The first QCL type is one of at least one second QCL type, each second QCL type in the at least one second QCL type corresponding to a type of parameter included in a multipath parameter, and the type of parameter included in each second QCL type corresponding to the multipath parameter being different.

37. The device of claim 35, wherein, The first QCL type is one of at least one third QCL type, each third QCL type in the at least one third QCL type corresponding to parameters including a first type of parameter and a second type of parameter, the first type of parameter being a sub-path corresponding multipath parameter, and the second type of parameter being a statistical parameter based on multipath.

38. The apparatus of claim 34, wherein, The TCI-state indicates resource configuration information of the second reference signal, The resource configuration information includes the type of parameter included in the first multipath parameter, or the resource configuration information has a correspondence relationship with the type of parameter included in the first multipath parameter.

39. The device of claim 38, wherein, The resource configuration information indicates at least one of the following information: Density of resources occupied by the reference signal, resources occupied by the reference signal, bandwidth occupied by the reference signal, port multiplexing manner of the reference signal, and transmission period of the reference signal.

40. The device of claim 35, wherein, The transceiver is further configured to: transmit second indication information, the second indication information indicating at least one first index, the at least one first index corresponding to each of the parameters included in the first multipath parameter in a one-to-one manner, and the first index having a first correspondence relationship with a value of each of the parameters included in the first multipath parameter.

41. The device of claim 40, wherein, The transceiver is further configured to: transmit first configuration information, the first configuration information being used to configure at least one second correspondence relationship, the at least one second correspondence relationship corresponding to each of the parameters included in the first multipath parameter in a one-to-one manner, the second correspondence relationship including a correspondence relationship between a plurality of second indexes and a plurality of value ranges and / or values corresponding to each of the parameters, and the second correspondence relationship including the first correspondence relationship.

42. The apparatus of any one of claims 33-41, wherein, The multipath parameter includes at least one of the following parameters: angle, time delay, power, Doppler, polarization information, and initial phase.

43. A communications device, characterized by The apparatus includes a module or unit for performing the method of any one of claims 1 to 21.

44. A communications device, characterized by The apparatus includes a processor configured to cause the communication device to perform the method of any one of claims 1 to 21.

45. A computer-readable storage medium, comprising: The computer readable storage medium has stored thereon a computer program or instructions, which, when executed on a communication device, cause the communication device to perform the method of any one of claims 1 to 21.

46. A computer program product, characterised in that, The computer program product includes a computer program or instructions, which, when executed on a communication device, cause the communication device to perform the method of any one of claims 1 to 21.

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