Communication method, device and system

Abstract

Provided are a communication method, device and system, the communication method comprising: receiving a first phase tracking reference signal (PTRS), the first PTRS being transmitted through a first resource; receiving a second PTRS, wherein the second PTRS is transmitted through a second resource; the first PTRS corresponds to first space parameter information, the first space parameter information is indicated by first indication information, the second PTRS corresponds to second space parameter information, and the second space parameter information is indicated by second indication information. In the method, different PTRSs are transmitted through different resources, and spatial parameter information corresponding to the different PTRSs is indicated through different indication information. Resource collision of the PTRS sent by different TRPs to the terminal equipment can be avoided, and the transmission reliability of the PTRS is improved.

Description

Technical Field

[0001] The present application relates to the field of communications, and in particular to a communication method, device and system. Background Art

[0002] The demodulation reference signal is used to estimate the equivalent channel matrix experienced by the data channel or control channel, and is therefore used for data detection and demodulation. In multi-station communication scenarios, different stations are currently constrained to send or receive demodulation reference signals and data resources without collision. However, how to avoid conflicts between phase tracking reference signal (PTRS) resources in multi-station environments has not been considered. Summary of the invention

[0003] The present application provides a communication method, device and system, which can avoid resource conflicts.

[0004] In a first aspect, a communication method is provided. The method may be executed by a terminal device, or may be executed by a chip or circuit used for the terminal device, which is not limited in the present application.

[0005] The method includes: receiving a first PTRS, the first PTRS is transmitted through the first resource; receiving a second PTRS, the second PTRS is transmitted through the second resource; the first PTRS corresponds to first spatial parameter information, the first spatial parameter information is indicated by first indication information, the second PTRS corresponds to second spatial parameter information, and the second spatial parameter information is indicated by second indication information.

[0006] The first resource and the second resource may be different, and the first indication information and the second indication information are different indication information. For example, the transmission resources of the first indication information and the second indication information are different. The first PTRS and the second PTRS come from different TRPs.

[0007] In other words, the method may also be: receiving first indication information, the first indication information indicating first spatial parameter information; receiving a first PTRS, the first PTRS corresponding to the first spatial parameter information; receiving second indication information, the second indication information indicating second spatial parameter information; receiving a second PTRS, the second PTRS corresponding to the second spatial parameter information.

[0008] In this method, different PTRS are transmitted through different resources, and the spatial parameter information corresponding to different PTRS is indicated by different indication information, which can avoid resource collision of PTRS sent by different TRPs to terminal devices and improve the transmission reliability of PTRS.

[0009] In certain implementations, the first spatial parameter is used to transmit at least one of a sounding reference signal SRS, a channel state information reference signal CSI-RS, a physical uplink control channel PUCCH, a physical downlink shared channel PDSCH, a physical downlink control channel PDCCH, a physical uplink shared channel PUSCH, a phase tracking reference signal PTRS, a demodulation reference signal DMRS, a tracking reference signal TRS, or a synchronization signal block SSB; and the second spatial parameter is used to transmit at least one of SRS, CSI-RS, PDSCH, PDCCH, PUSCH, PUCCH, PTRS, DMRS, TRS, or SSB.

[0010] In some implementations, the first spatial parameter is used to transmit a first PDSCH, and the antenna port of the first PDSCH is indicated by third indication information; the second spatial parameter is used to transmit a second PDSCH, and the antenna port of the second PDSCH is indicated by fourth indication information.

[0011] In some implementations, the antenna port of the first PDSCH and the antenna port of the second PDSCH belong to different CDM groups.

[0012] In some implementations, the third indication information and / or the fourth indication information is carried in radio resource control RRC signaling or downlink control information DCI, or media access control element MAC-CE.

[0013] In some implementations, the first index corresponding to the first PTRS is the same as the first index corresponding to the first indication information, and / or the first index corresponding to the second PTRS is the same as the first index indicated by the second indication information.

[0014] In some implementations, the method further includes: receiving fifth indication information, wherein the fifth indication information indicates a first value of the first index, and receiving sixth indication information, wherein the sixth indication information indicates a second value of the first index.

[0015] In certain implementations, the fifth indication information is carried in RRC signaling, MAC-CE or DCI, and the sixth indication information is carried in RRC signaling, MAC-CE or DCI.

[0016] In some implementations, the first resource is different from the second resource.

[0017] In some implementations, the first resource and the second resource occupy different REs.

[0018] In certain implementations, the time domain density of the antenna port of the first PTRS is a first time domain density, the first resource is associated with the first time domain density, the first time domain density is indicated by PTRS configuration information, the PTRS configuration information is carried in RRC signaling, or the first time domain density is predefined.

[0019] In certain implementations, the time domain density of the antenna port of the second PTRS is a second time domain density, the second resource is associated with the second time domain density, the second time domain density is indicated by PTRS configuration information, the PTRS configuration information is carried in RRC signaling, or the second time domain density is predefined.

[0020] That is, the value of the time domain density of the first resource is predefined or configured by high-level signaling, and / or the value of the time domain density of the second resource is predefined or configured by high-level signaling.

[0021] In some implementations, the time domain resources of the first resources are determined according to the first time domain density value, and / or the time domain resources of the second resources are determined according to the second time domain density value.

[0022] In some implementations, the frequency domain density of the antenna port of the first PTRS is a first frequency domain density, the first resource is associated with the first frequency domain density, the first frequency domain density is predefined, or the first frequency domain density is associated with a third value, and / or,

[0023] The frequency domain density of the antenna port of the second PTRS is a second frequency domain density, the second resource is associated with the second frequency domain density, the second frequency domain density is predefined, or the second frequency domain density is associated with a fourth value.

[0024] In some implementations, the third value and / or the fourth value includes at least one of the number of values ​​contained in the first index, the number of sending and receiving points TRP, or the number of network nodes.

[0025] In some implementations, the frequency domain resources of the first resources are determined according to the first frequency domain density value, and / or the frequency domain resources of the second resources are determined according to the second frequency domain density value.

[0026] In some implementations, the first offset is associated with a fifth value, the fifth value includes an identifier of a first TRP and / or a value of a first index corresponding to the first TRP, the second offset is associated with a sixth value, the sixth value includes an identifier of a second TRP and / or a value of a first index corresponding to the second TRP, the first offset is the RB offset of the first resource, and the second offset is the RB offset of the second resource.

[0027] In some implementations, an offset of REs included in the frequency domain resources of the first resource within the RB and an offset of REs included in the frequency domain resources of the second resource within the RB are predefined.

[0028] In the above implementation, the time domain density, frequency domain density, RB offset and RE offset are predefined or configured to optimize the PTRS resource design, ensure the PTRS performance, and improve the time and frequency resource utilization.

[0029] In some implementations, the antenna port of the first PTRS is a first antenna port, the antenna port of the second PTRS is a second antenna port, and the association between the first PTRS and the first antenna port and / or the association between the second PTRS and the second antenna port is high-level configured or predefined.

[0030] In some implementations, the first antenna port is the port with the smallest port index in the first CDM group, the first CDM group is the CDM group to which the first antenna port belongs, the second antenna port is the port with the smallest port index in the second CDM group, and the second CDM group is the CDM group to which the second antenna port belongs.

[0031] That is, each TRP is bound to the DMRS port with the smallest port number in the CDM group.

[0032] In some implementations, the first antenna port is the antenna port with the smallest index among the antenna ports of the first PDSCH, and the second antenna port is the antenna port with the smallest index among the antenna ports of the second PDSCH.

[0033] In some implementations, the time domain density of the first resource and / or the time domain density of the second resource is determined from at least one candidate time domain density, the at least one candidate time domain density is predefined, and the time domain density of the first resource and / or the time domain density of the second resource is configured at a high level.

[0034] That is, the time domain density and the frequency domain density are determined from the candidates. In this way, the terminal device has high flexibility in determining the PTRS resources.

[0035] In some implementations, the frequency domain density of the first resource and / or the frequency domain density of the second resource is determined from at least one candidate frequency domain density, the at least one candidate frequency domain density is predefined, and the frequency domain density of the first resource and / or the frequency domain density of the second resource is configured at a high level.

[0036] In some implementations, the time domain density of the first resource is associated with a first index corresponding to the first PTRS, the time domain density of the second resource is associated with a first index corresponding to the second PTRS, and the value of the first index is configured by a high-level layer.

[0037] In some implementations, the first offset is determined from at least one first candidate offset, the first offset being an RB offset of the first resource,

[0038] The second offset is determined from at least one second candidate offset, the second offset being an RB offset of the second resource,

[0039] The at least one first candidate offset or the at least one second candidate offset is predefined, and the first offset and / or the second offset is configured by a high level.

[0040] In certain implementations, the offset of the RE included in the frequency domain resources of the first resource within the RB, and / or the offset of the RE included in the frequency domain resources of the second resource within the RB is determined from at least one third candidate offset, and the at least one third candidate offset is predefined, and the offset of the RE included in the frequency domain resources of the first resource within the RB, and / or the offset of the RE included in the frequency domain resources of the second resource within the RB is configured by a high level.

[0041] On the second aspect, a communication method is provided, which can be executed by a TRP or a network node, or can also be executed by a chip or circuit used for a TRP or a network node, and the present application does not limit this.

[0042] The method includes: sending a first PTRS, the first PTRS is transmitted through a first resource, the first PTRS corresponds to first space parameter information, and the first space parameter information is indicated by first indication information.

[0043] In certain implementations, the first spatial parameter is used to transmit at least one of a sounding reference signal SRS, a channel state information reference signal CSI-RS, a physical uplink control channel PUCCH, a physical downlink shared channel PDSCH, a physical downlink control channel PDCCH, a physical uplink shared channel PUSCH, a phase tracking reference signal PTRS, a demodulation reference signal DMRS, a tracking reference signal TRS, or a synchronization signal block SSB.

[0044] In some implementations, the first spatial parameter is used to transmit a first PDSCH, and an antenna port of the first PDSCH is indicated by third indication information.

[0045] In some implementations, the third indication information is carried in radio resource control RRC signaling or downlink control information DCI, or media access control element MAC-CE.

[0046] In some implementations, the first index corresponding to the first PTRS has the same value as the first index corresponding to the first indication information.

[0047] In some implementations, the method further includes: sending fifth indication information, where the fifth indication information indicates a first value of the first index.

[0048] In some implementations, the fifth indication information is carried in RRC signaling, MAC-CE or DCI.

[0049] In certain implementations, the time domain density of the antenna port of the first PTRS is a first time domain density, the first resource is associated with the first time domain density, the first time domain density is indicated by PTRS configuration information, the PTRS configuration information is carried in RRC signaling, or the first time domain density is predefined.

[0050] In some implementations, the time domain resource of the first resource is determined according to the value of the first time domain density.

[0051] In some implementations, the frequency domain density of the antenna port of the first PTRS is a first frequency domain density, the first resource is associated with the first frequency domain density, the first frequency domain density is predefined, or the first frequency domain density is associated with a third value.

[0052] In some implementations, the third value includes at least one of the number of values ​​included in the first index, the number of sending and receiving points TRP, or the number of network nodes.

[0053] In some implementations, the frequency domain resources of the first resources are determined according to a value of the first frequency domain density.

[0054] In some implementations, the first offset is associated with a fifth value, the fifth value includes an identifier of a first TRP and / or a value of a first index corresponding to the first TRP, and the first offset is an RB offset of the first resource.

[0055] In some implementations, the offset of REs included in the frequency domain resources of the first resources within the RB is predefined.

[0056] In some implementations, the antenna port of the first PTRS is a first antenna port, and an association relationship between the first PTRS and the first antenna port is configured at a high level or is predefined.

[0057] In some implementations, the first antenna port is a port with the smallest port index in a first CDM group, and the first CDM group is a CDM group to which the first antenna port belongs.

[0058] In some implementations, the first antenna port is an antenna port with the smallest index among antenna ports of the first PDSCH.

[0059] In some implementations, the time domain density of the first resource is determined from at least one candidate time domain density, the at least one candidate time domain density is predefined, and the time domain density of the first resource is configured at a high level.

[0060] In some implementations, the frequency domain density of the first resource is determined from at least one candidate frequency domain density, the at least one candidate frequency domain density is predefined, and the frequency domain density of the first resource is configured by a high level.

[0061] In some implementations, the time domain density of the first resource is associated with a first index corresponding to the first PTRS, and the value of the first index is configured by a high-level layer.

[0062] In some implementations, the first offset is determined from at least one first candidate offset, the first offset is an RB offset of the first resource, the at least one first candidate offset is predefined, and the first offset is configured by a high layer.

[0063] In certain implementations, the offset of the RE included in the frequency domain resources of the first resource within the RB is determined from at least one third candidate offset, the at least one third candidate offset is predefined, and the offset of the RE included in the frequency domain resources of the first resource within the RB is configured by a high level.

[0064] On the third aspect, a communication method is provided, which can be executed by a TRP or a network node, or can also be executed by a chip or circuit used for a TRP or a network node, and this application does not limit this.

[0065] The method includes: sending a second PTRS, the second PTRS is transmitted through a second resource, the second PTRS corresponds to second space parameter information, and the second space parameter information is indicated by second indication information.

[0066] In some implementations, the second spatial parameter is used to transmit at least one of SRS, CSI-RS, PDSCH, PDCCH, PUSCH, PUCCH, PTRS, DMRS, TRS, or SSB.

[0067] In some implementations, the second spatial parameter is used to transmit a second PDSCH, and an antenna port of the second PDSCH is indicated by fourth indication information.

[0068] In some implementations, the fourth indication information is carried in radio resource control RRC signaling or downlink control information DCI, or media access control element MAC-CE.

[0069] In some implementations, the first index corresponding to the second PTRS has the same value as the first index indicated by the second indication information.

[0070] In some implementations, the method further includes: sending sixth indication information, where the sixth indication information indicates a second value of the first index.

[0071] In some implementations, the sixth indication information is carried in RRC signaling, MAC-CE or DCI.

[0072] In certain implementations, the time domain density of the antenna port of the second PTRS is a second time domain density, the second resource is associated with the second time domain density, the second time domain density is indicated by PTRS configuration information, the PTRS configuration information is carried in RRC signaling, or the second time domain density is predefined.

[0073] In some implementations, the time domain resource of the second resource is determined according to the value of the second time domain density.

[0074] In some implementations, the frequency domain density of the antenna port of the second PTRS is a second frequency domain density, the second resource is associated with the second frequency domain density, the second frequency domain density is predefined, or the second frequency domain density is associated with a fourth value.

[0075] In some implementations, the fourth value includes at least one of the number of values ​​contained in the first index, the number of sending and receiving points TRP, or the number of network nodes.

[0076] In some implementations, the frequency domain resources of the second resources are determined according to a value of the second frequency domain density.

[0077] In some implementations, the second offset is associated with a sixth value, the sixth value includes an identifier of a second TRP and / or a value of a first index corresponding to the second TRP, and the second offset is an RB offset of the second resource.

[0078] In some implementations, the offset of REs included in the frequency domain resources of the second resources within the RB is predefined.

[0079] In some implementations, the antenna port of the second PTRS is a second antenna port, and the association relationship between the second PTRS and the second antenna port is configured at a high level or is predefined.

[0080] In some implementations, the second antenna port has the smallest port index in the second CDM group, and the second CDM group is the CDM group to which the second antenna port belongs.

[0081] In some implementations, the second antenna port is the antenna port with the smallest index among the antenna ports of the second PDSCH.

[0082] In some implementations, the time domain density of the second resource is determined from at least one candidate time domain density, the at least one candidate resource density is predefined, and the time domain density of the second resource is configured at a high level.

[0083] In some implementations, the frequency domain density of the second resource is determined from at least one candidate frequency domain density, the at least one candidate frequency domain density is predefined, and the frequency domain density of the second resource is configured by a high layer.

[0084] In some implementations, the time domain density of the second resource is associated with a first index corresponding to the second PTRS, and the value of the first index is configured by a high layer.

[0085] In some implementations, the second offset is determined from at least one second candidate offset, the second offset is an RB offset of the second resource, the at least one second candidate offset is predefined, and the second offset is configured by a high layer.

[0086] In certain implementations, the offset of RE included in the frequency domain resources of the second resource within the RB is determined from at least one third candidate offset, the at least one third candidate offset is predefined, and the offset of RE included in the frequency domain resources of the second resource within the RB is configured by a high level.

[0087] It should be understood that the second aspect and the third aspect are respectively the implementation methods of the TRP side or the network node side corresponding to the first aspect. The explanation, supplement and description of the beneficial effects of the first aspect are also applicable to the second aspect and the third aspect and will not be repeated here.

[0088] In a fourth aspect, an embodiment of the present application provides a communication device, comprising a transceiver unit and a processing unit, wherein the communication device is used to execute the method of the first aspect, or any possible method in the first aspect, or all possible methods in the first aspect.

[0089] In a fifth aspect, an embodiment of the present application provides a communication device, comprising a transceiver unit and a processing unit, wherein the communication device is used to execute the method of the second aspect, or the third aspect, or any possible method in the second aspect, or any possible method in the third aspect, or all possible methods in the second aspect, or all possible methods in the third aspect.

[0090] In a sixth aspect, an embodiment of the present application provides a communication device, comprising an interface circuit and a processor, wherein the interface circuit is used to implement the function of the transceiver module in the fifth aspect, and the processor is used to implement the function of the processing module in the fifth aspect.

[0091] In the seventh aspect, an embodiment of the present application provides a communication device, including an interface circuit and a processor, wherein the interface circuit is used to implement the function of the transceiver module in the sixth aspect, and the processor is used to implement the function of the processing module in the sixth aspect.

[0092] In an eighth aspect, an embodiment of the present application provides a computer-readable medium storing a program code for execution by a terminal device, the program code comprising instructions for executing the method of the first aspect, or any possible method in the first aspect, or all possible methods in the first aspect.

[0093] In the ninth aspect, an embodiment of the present application provides a computer-readable medium storing a program code for execution by a network device, the program code comprising instructions for executing the method of the second aspect, or the third aspect, or any possible manner in the second aspect, or any possible manner in the third aspect, or all possible manners in the second aspect, or all possible manners in the third aspect.

[0094] In the tenth aspect, a computer program product storing computer-readable instructions is provided, which, when the computer-readable instructions are executed on a computer, causes the computer to execute the method of the first aspect, or any possible manner in the first aspect, or all possible manners in the first aspect.

[0095] In the eleventh aspect, a computer program product storing computer-readable instructions is provided, which, when the computer-readable instructions are executed on a computer, enables the computer to execute the method of the above-mentioned second aspect, or the third aspect, or any possible manner in the second aspect, or any possible manner in the third aspect, or all possible manners in the second aspect, or all possible manners in the third aspect.

[0096] In the twelfth aspect, a communication system is provided, which includes a method for implementing the above-mentioned first aspect, or any possible manner in the first aspect, or all possible manners in the first aspect, the second aspect, or the third aspect, or any possible manner in the second aspect, or any possible manner in the third aspect, or all possible manners in the second aspect, or all possible manners in the third aspect, and a device with various possible designed functions.

[0097] In the thirteenth aspect, a processor is provided, which is coupled to a memory and is used to execute the method of the above-mentioned first aspect, or any possible method in the first aspect, or all possible methods in the first aspect.

[0098] In a fourteenth aspect, a processor is provided, coupled to a memory, for executing the method of the second aspect, or the third aspect, or any possible manner in the second aspect, or any possible manner in the third aspect, or all possible manners in the second aspect, or all possible manners in the third aspect.

[0099] In a fifteenth aspect, a chip system is provided, the chip system includes a processor and may also include a memory for executing a computer program or instruction stored in the memory, so that the chip system implements the method in any of the first aspect, the second aspect, or the third aspect, and any possible implementation of any aspect. The chip system may be composed of a chip, or may include a chip and other discrete devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0100] Figure 1 It is a schematic diagram of a communication system provided in an embodiment of the present application.

[0101] Figure 2 There are two types of pilot patterns.

[0102] Figure 3 It is a schematic diagram of a communication method proposed in this application.

[0103] Figure 4 It is a schematic diagram of a communication device provided in an embodiment of the present application.

[0104] Figure 5This is a schematic diagram of a network device provided in an embodiment of the present application.

[0105] Figure 6 It is a schematic diagram of a terminal device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0106] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0107] The technical solution of the embodiment of the present application can be applied to various communication systems, for example: th Generation, 5G) system or new radio (new radio, NR), evolved packet core (evolved packet core, EPC), evolved packet system (evolved packet system, EPS), evolved universal mobile telecommunication system (univeRMal mobile telecommunication system, UMTS) terrestrial radio access network (evolved UMTSterrestrial radio access network, E-UTRAN), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), etc. The technical solution provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system.

[0108] The technical solutions of the embodiments of 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 systems or other communication systems.

[0109] The terminal device in the embodiments of the present application can be called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.

[0110] The terminal device may be a device that provides voice / data to users, for example, a handheld device or a vehicle-mounted device with a wireless connection function. At present, some terminals may be, for example, mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, wearable devices, terminal devices in 5G networks or future evolved public land mobile communication networks (public land mobile The embodiments of the present application do not limit this.

[0111] As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices. Wearable devices may be a general term for devices that are intelligently designed and developed for daily wear using wearable technology, such as glasses, gloves, watches, clothing, and shoes. In other words, a wearable device is a portable device that can be worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include devices that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.

[0112] In addition, in the embodiments of the present application, the terminal device can also be a terminal device in an IoT system. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network that interconnects people and machines and things.

[0113] In addition, terminal devices can also include sensors such as smart printers, train detectors, and gas stations. Their main functions include collecting data (part of the terminal equipment), receiving control information and downlink data from network devices, and sending electromagnetic waves to transmit uplink data to network devices.

[0114] The network device in the embodiment of the present application can be a device for communicating with a terminal device. The network device can be a next-generation base station (gNodeB, gNB) in a 5G communication system, a next-generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc., an evolved node B (evolved nodeB, eNB) in an LTE system, a radio network controller (radio network controller, RNC), a node B (node ​​B, NB), a base station controller (base station controller, BSC), a home base station (for example, home evolved NodeB, or home NodeB, HNB), a base band unit (base band unit, BBU), a transmission reception point (transmission reception point, TRP), a transmitting point (transmitting point, TP), a base transceiver station (base transceiver station, BTS), etc.

[0115] In a network structure, the network device may include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node, or a control plane CU node and a user plane CU node, and a RAN device of a DU node. The network device may provide services for a cell, and a terminal device communicates with a base station through the transmission resources (e.g., frequency domain resources, or spectrum resources) used by the cell. The cell may be a cell corresponding to a base station (e.g., a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell. The small cell here may include: a metro cell, a micro cell, a pico cell, a femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services. The network device can be a macro base station, a micro base station or an indoor station, a relay node or a donor node, a device that provides wireless communication services to user devices in a V2X communication system, a wireless controller in a cloud radio access network (CRAN) scenario, a relay station, a vehicle-mounted device, a wearable device, and a network device in a future evolution network, etc. The embodiments of the present application do not limit the specific technology and specific form of the network device.

[0116] In an embodiment of the present application, a terminal device or a network device may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory). The operating system may be any one or more computer operating systems that implement business processing through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system. The application layer includes applications such as a browser, an address book, a word processing software, and an instant messaging software. In addition, the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided in the embodiment of the present application, as long as it can communicate according to the method provided in the embodiment of the present application by running a program that records the code of the method provided in the embodiment of the present application, for example, the execution subject of the method provided in the embodiment of the present application may be a terminal device or a network device, or a functional module in a terminal device or a network device that can call a program and execute the program.

[0117] Figure 1 1 is an exemplary architecture diagram of a communication system 100 applicable to an embodiment of the present application. Figure 1 As shown, the communication system 100 may include at least one network device, such as Figure 1 The communication system 100 may also include at least one terminal device, such as Figure 1 The terminal devices 102 to 107 shown. The terminal devices 102 to 107 may be mobile or fixed. The network device 101 may provide communication coverage for a specific geographical area, and the terminal devices 102 to 107 may be terminal devices located within the coverage area. The network device 101 and one or more of the terminal devices 102 to 107 may communicate via a wireless link.

[0118] Optionally, the terminal devices may communicate directly with each other. For example, the direct communication between the terminal devices may be realized by using device to device (D2D) technology. Figure 1 As shown in , the terminal device 105 can directly communicate with the terminal device 106 and the terminal device 105 can directly communicate with the terminal device 107 using the D2D technology. The terminal device 106 and the terminal device 107 can communicate with the terminal device 105 individually or simultaneously.

[0119] Terminal devices 105 to 107 may also communicate with network device 101 respectively. For example, they may communicate directly with network device 101, such as terminal devices 105 and 106 in the figure may communicate directly with network device 101; or they may communicate indirectly with network device 101, such as terminal device 107 in the figure communicates with network device 101 via terminal device 105.

[0120] Figure 1 Each communication device in the communication system 100 shown in the figure may be configured with multiple antennas. For each communication device, the multiple antennas configured may include at least one transmitting antenna for sending signals and at least one receiving antenna for receiving signals. Therefore, each communication device in the communication system 100 may communicate with each other through MIMO technology.

[0121] It should be understood that Figure 1 This is a simplified schematic diagram for ease of understanding only. The communication system 100 may also include other network devices or other terminal devices. Figure 1 Not drawn in.

[0122] To facilitate understanding of the embodiments of the present application, the following first briefly introduces the terms and background involved in the present application.

[0123] 1. Antenna port

[0124] Antenna port is referred to as port for short. It can be understood as a transmitting antenna identified by the receiving end, or a transmitting antenna that can be distinguished in space. The transmitting antenna can be a virtual antenna or a spatial resource. For each virtual antenna or spatial resource, an antenna port can correspond, and each virtual antenna can be a weighted combination of multiple physical antennas. Depending on the signal carried, the antenna port can be divided into a reference signal port and a data port. Among them, the reference signal port may include but is not limited to a DMRS port, a channel state information reference signal (CSI-RS) port, etc. For the DMRS port, each antenna port corresponds to a spatial stream or spatial layer. Each DMRS port corresponds to a port index. Each DMRS port corresponds to a DMRS sequence, and each DMRS port corresponds to one or more time-frequency resources. The corresponding DMRS sequence is mapped according to the rules in the time-frequency resource unit contained in one or more time-frequency resources. The DMRS sequence can also be called a DMRS symbol sequence or a DMRS symbol vector. The time-frequency resource unit can be a frequency domain subcarrier or an OFDM symbol, or a resource element (RE).

[0125] In the present application, the port corresponding to port index X may be referred to as port X or port PX. Port index X may also correspond to port index 1000+X, where X is an integer. For example, port index 1000 may also represent port index 0, and port index 1001 may also represent port index 1. The port corresponding to port index 1000 or port index 0 may be referred to as port 0 or port P0. The port corresponding to port index 1001 or port index 1 may be referred to as port 1 or port P1.

[0126] This application includes existing ports and newly added ports. Existing ports refer to ports in existing protocols, or ports that support technical solutions in existing protocols; newly added ports refer to ports that can support the technical solutions of this application.

[0127] In the present application, the reference signal takes DMRS as an example, but is not limited to this. For example, it can also be other reference signals, such as channel state information reference signal CSI-RS, channel sounding reference signal (sounding reference signal, SRS), phase tracking reference signal (phase-tracking reference signals, PTRS), tracking reference signal (tracking reference signal, TRS), etc.

[0128] 2. Time and frequency resources

[0129] In an embodiment of the present application, data or information may be carried by time-frequency resources. The time-frequency resources may include resources in the time domain and resources in the frequency domain. In the time domain, the time-frequency resources may include one or more time domain units (also referred to as time units, time units, etc.); in the frequency domain, the time-frequency resources may include one or more frequency domain units.

[0130] Among them, a time domain unit can be a symbol or several symbols (such as OFDM symbols), or a time slot, or a mini-slot, or a subframe. Among them, a time slot can be composed of 7 or 14 symbols; a mini-slot can include at least one symbol (for example, 2 symbols or 7 symbols or 14 symbols, or any number of symbols less than or equal to 14 symbols); the duration of a subframe in the time domain can be 1 millisecond (ms). It should be understood that the above-mentioned time domain unit sizes listed are only for the convenience of understanding the scheme of the present application, and do not constitute a limitation on the protection scope of the present application. It can be understood that the above-mentioned time domain unit sizes can be other values, and the present application does not limit them.

[0131] A frequency domain unit can be a resource block (RB), a subcarrier, a resource block group (RBG), a predefined subband, a precoding resource block group (PRG), a bandwidth part (BWP), a resource element (RE) (also called a resource unit or resource particle), or a carrier, or a serving cell.

[0132] 3. Demodulation reference signal (DMRS)

[0133] In a new radio (NR) system, DMRS is used for equivalent channel matrix estimation of a data channel, such as a physical uplink share channel (PUSCH) or a control channel, such as a physical downlink control channel (PDCCH), so as to detect and demodulate data on the corresponding channel.

[0134] Taking the data channel PDSCH as an example, DMRS is usually precoded in the same way as the transmitted data signal, so as to ensure that DMRS and the data signal experience the same equivalent channel. Assume that the DMRS vector sent by the transmitter is s, and the data signal vector sent is x. DMRS and the data signal are precoded in the same way (multiplied by the same precoding matrix). The data signal vector y and DMRS vector r received by the receiver can be expressed by formula (1) and formula (2) respectively:

[0135]

[0136]

[0137] in, represents the equivalent channel experienced by the data signal and DMRS, and n represents additive noise. Based on the known DMRS vector s, the receiver can obtain the equivalent channel using channel estimation algorithms such as least square (LS) channel estimation and minimum mean square error (MMSE) channel estimation. The demodulation of the data signal can be completed based on the equivalent channel.

[0138] With the introduction of MIMO technology into wireless communication systems, the transmitter can transmit multi-stream data on the same time-frequency resources, and the receiver can recover all of them. At this time, DMRS is used to estimate the equivalent channel matrix, whose dimension can be N R ×R, where N R represents the number of receiving antennas, and R represents the number of transmission streams (also called the number of transmission layers or spatial layers). Usually, one DMRS port corresponds to one transmission stream, that is, for MIMO transmission with R transmission streams, the number of DMRS ports required is R. In order to ensure the quality of channel estimation, the DMRS ports corresponding to multiple transmission streams are orthogonal ports.

[0139] For a DMRS port, in order to perform channel estimation on different time-frequency resources, multiple DMRS need to be sent on multiple time-frequency resources. Multiple DMRS corresponding to a port correspond to a DMRS sequence. A DMRS sequence includes multiple DMRS sequence elements.

[0140] Taking the DMRS sequence generated by the gold sequence as an example, the DMRS sequence r l The nth DMRS sequence element in (n) can be generated by the following formula:

[0141]

[0142] Where c(n) is a pseudo-random sequence, and c(n) can be a gold sequence with a sequence length of 31. For an output length of M PN The sequence c(n), n=0,1,...,M PN -1, can be determined by formula (4):

[0143] c(n)=(x1(n+N C )+x2(n+N C ))mod2

[0144] x1(n+31)=(x1(n+3)+x1(n))mod2

[0145] x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod2 (4)

[0146] Among them, N C = 1600, the first m sequence x1(n) can be initialized to x1(0) = 1, x1(n) = 0, n = 1, 2, ..., 30, and the second m sequence x2(n) can be initialized by parameter c init Initialization, c init It can be determined by formula (5):

[0147]

[0148] Wherein, l represents the index value of an OFDM symbol in a time slot; is the number of symbols contained in a time slot; is a time slot index within a system frame; It is an initialization parameter, and its value can be 0 or 1; It can be configured by high-level signaling, which is related to the cell (identifier, ID), and can usually be equal to the cell ID; λ represents the code division multiplexing (code division multiplexing, CDM) group (group) index corresponding to the DMRS port.

[0149] The DMRS sequence corresponding to a DMRS port can be mapped to the corresponding time-frequency resource through the preset time-frequency resource mapping rule. For antenna port p (corresponding to DMRS port p), the mth sequence element r(m) in the corresponding DMRS sequence can be mapped to the index (k, l) according to the mapping rule shown in formula (6) p,μ RE on:

[0150]

[0151] Among them, the index is (k,l) p,μThe RE corresponds to an OFDM symbol with an index of l in a time slot in the time domain and to a subcarrier with an index of k in the frequency domain. To map to index (k,l) p,μ The DMRS modulation symbol corresponding to the DMRS port p on the RE, Δ is the subcarrier offset factor; type1 and type2 represent the two DMRS configuration types (DMRS configuration type) currently defined in the NR protocol; μ is the subcarrier spacing; is the index of the starting OFDM symbol occupied by the DMRS modulation symbol or the index of the reference OFDM symbol; is the power scaling factor; w f (k′) is the frequency domain mask element corresponding to the subcarrier with index k′, w t (l′) is the time domain mask element corresponding to the OFDM symbol with index l′; m=2n+k′.

[0152] In the configuration type 1 mapping rule, the DMRS port p corresponds to w f (k′), w t For the values ​​of (l′) and Δ, please refer to Table 1 or Section 6.4.1.1.3 of TS 38.211.

[0153] Table 1 Type 1 DMRS parameter values

[0154]

[0155] In the configuration type 2 mapping rule, the DMRS port p corresponds to w f (k′), w t (l′), and the value of Δ can be determined according to Table 2.

[0156] Table 2 Type 2DMRS parameter values

[0157]

[0158] In Table 1 and Table 2, λ represents the index of the CDM group, and the DMRS ports in the same CDM group occupy the same time-frequency resources.

[0159] 4. DMRS configuration type

[0160] Figure 2 Two configuration types of DMRS patterns are shown. The pattern can also be understood as a time-frequency resource mapping method. Figure 2REs with different filling patterns correspond to different CDM groups; P0, P1, ..., P11 represent DMRS port 0 to DMRS port 11; the numbers on the horizontal axis represent the index of a symbol in a time slot, and the numbers on the vertical axis represent the index of a subcarrier in an RB.

[0161] It should be understood that Figure 2 The DMRS occupying symbol 0 and the occupying symbols 0 and 1 are only examples. The symbols occupied by the DMRS in a time slot may also be other symbols, such as occupying symbol 1, or occupying symbols 1 and 2.

[0162] See also Figure 2 (a), for single-symbol DMRS of configuration type 1, up to 4 orthogonal DMRS ports are supported. The 4 DMRS ports are divided into 2 CDM groups (CDM group 0 and CDM group 1), and each CDM group supports up to 2 orthogonal DMRS ports. Among them, CDM group 0 contains DMRS ports P0 and P1, and CDM group 1 contains P2 and P3. Frequency division multiplexing (FDM) is used between CDMgroups (mapped on different frequency domain resources); the DMRS ports contained in the CDM group are mapped on the same time domain resources (resource mapping is performed in a comb-tooth manner in the frequency domain). The reference signals corresponding to the DMRS ports contained in the CDM group are distinguished by an orthogonal cover code (OCC) to ensure the orthogonality of the DMRS ports in the CDM group.

[0163] See also Figure 2 (b), dual-symbol DMRS of configuration type 1 supports up to 8 orthogonal DMRS ports. The 8 DMRS ports belong to 2 CDM groups (CDM group 0 and CDM group 1). Among them, CDM group 0 contains P0, P1, P4 and P5; CDM group 1 contains P2, P3, P6 and P7. P0, P1, P4 and P5 are located in the same RE, and resources are mapped in a comb-tooth manner in the frequency domain. Similarly, P2, P3, P6 and P7 are located in the same RE and mapped in a comb-tooth manner on the unoccupied subcarriers of P0, P1, P4 and P5 in the frequency domain. For a DMRS port, the occupied 2 adjacent subcarriers and 2 OFDM symbols correspond to an OCC sequence of length 4 (which can be obtained by referring to Table 1).

[0164] Figure 2(c) and (d) correspond to the time-frequency resource mapping modes of single-symbol DMRS and double-symbol DMRS of configuration type 2, respectively. Figure 2 As shown in (c), the single-symbol DMRS of configuration type 2 supports up to 6 orthogonal DMRS ports. The 6 DMRS ports belong to 3 CDM groups (CDM group 0, CDM group 1 and CDM group 2). Figure 2 As shown in (d), for dual-symbol DMRS of configuration type 2, up to 12 orthogonal DMRS ports are supported. The 12 DMRS ports belong to 3 CDM groups (CDM group 0, CDM group 1 and CDM group 2). For the sake of brevity, the introduction of CDM groups of configuration type 2 DMRS and the time-frequency resources occupied by each DMRS port is omitted here.

[0165] As wireless communication equipment is deployed more densely in the future and the number of terminal devices further increases, higher requirements are placed on the number of MIMO transmission streams. In addition, with the continuous evolution of the subsequent Massive MIMO system, the number of transmitting and receiving antennas will further increase (for example, the number of network equipment transmitting antennas supports 128T or 256T, and the number of terminal receiving antennas is 8R), and channel information acquisition is more accurate, which can further support a higher number of transmission streams to improve the spectrum efficiency of the MIMO system. The above aspects will inevitably require more DMRS ports to support a higher number of transmission streams (greater than 12 streams). With the increase in the number of transmission streams, higher requirements are placed on the accuracy of channel estimation.

[0166] During each data transmission process, the network device needs to inform the terminal device of the allocated antenna port (DMRS port) and the configuration type of DMRS. In this way, the terminal device can receive the DMRS signal and perform the channel estimation process in the corresponding time-frequency resources based on the allocated antenna port and the DMRS symbol generation method and time-frequency resource mapping rules defined in the protocol.

[0167] For example, when scheduling a terminal device, the network device will indicate to the terminal device the corresponding configured DMRS type and the maximum number of DMRS symbols. Currently, the NR protocol defines a method for semi-statically configuring the DMRS type through high-level signaling (e.g., radio resource control (RRC) signaling) and dynamically notifying the allocated DMRS port index through downlink control information (DCI). The details are as follows:

[0168] (1) RRC signaling configures the DMRS type and number of occupied symbols.

[0169] The DMRS type used is configured through the high-level signaling DMRS-DownlinkConfig. The specific signaling content is as follows:

[0170]

[0171] Exemplarily, the network device configures the configuration type of DMRS through high-level signaling DMRS-DownlinkConfig, wherein the dmrs-Type field can be used to indicate whether it is type 1 or type 2 DMRS; the maxLength field can be used to indicate whether single-symbol DMRS or dual-symbol DMRS is used. If the maxLength is configured to len2, the DCI can further indicate whether single-symbol DMRS or dual-symbol DMRS is used; if the maxLength field is not configured, single-symbol DMRS is used.

[0172] (2) High-level signaling configuration PTRS

[0173] PTRS is configured through the high-level signaling PTRS-DownlinkConfig. The specific signaling content is as follows:

[0174]

[0175]

[0176] Among them, the high-level configuration includes five parameters, namely: frequency domain density (frequencyDensity), time domain density (timeDensity), Epre ratio (epre-Ratio), RE offset (resourceElementOffset) and maximum number of PTRS ports-r16 (maxNrofPorts-r16).

[0177] (3) High-level signaling configuration control resource set

[0178] By way of example, the high-level configuration of a control resource collection is as follows:

[0179]

[0180]

[0181] Among them, coresetPoolIndex-r16 is the configuration information for controlling the resource set index.

[0182] (4) DCI signaling notification

[0183] The DCI signaling contains the field Antenna port, which is used to indicate the assigned DMRS port index. For different dmrs-Type and maxLength configuration values, the NR protocol defines different DMRS port tables. Table 3 shows the DMRS table corresponding to DMRS type Type 1DMRS, maxLength = 1. The field Antenna port in the DCI signaling indicates the index value in the corresponding DMRS port table, and each index value corresponds to one or more DMRS port indexes.

[0184] Table 3 (dmrs-Type=1, maxLength=1)

[0185]

[0186] 4. Phase tracking reference signal (PTRS)

[0187] The Phase Tracking Reference Signal (PTRS) is a reference signal in NR, which is mainly used by the sender and receiver to correct the interference caused by the crystal phase error. It can also be used to suppress phase noise and common phase errors in the frequency domain (especially high-frequency millimeter waves). There are phase tracking reference signals in both the uplink and downlink channels. For example, in the downlink channel, PTRS is used to help the receiver better estimate the characteristics of the downlink channel and perform corresponding phase noise compensation. In the uplink channel, PTRS is used to help network equipment (such as base stations) better estimate the characteristics of the uplink channel and perform corresponding phase noise compensation.

[0188] PTRS is also sent through antenna ports, for example, it can be associated with DMRS ports. The PTRS port time-frequency resource mapping method is as follows:

[0189]

[0190] Among them, α is the PTRS transmission symbol, p is the antenna port number, μ is the subcarrier spacing, k is the frequency domain position index, l is the time domain position index, β is the PTRS power factor, and r is the base sequence.

[0191] The mth sequence element r(m) in the corresponding PTRS sequence, indexed as (k,l) p,μ The RE of corresponds to an OFDM symbol with index l in a time slot in the time domain and to a subcarrier with index k in the frequency domain. To map to index (k,l) p,μ The PTRS modulation symbol corresponding to the PTRS port p on the RE.

[0192] Among them, the value of the time domain position l corresponding to PTRS is as follows:

[0193] The set of time indices defined relative to the start of a PDSCH allocation is defined by the following formula:

[0194] 1. Set i = 0 and l ref =0

[0195] 2. If max(l ref +(i-1)L PT-RS +1,l ref ),...、l ref +i L PT-RS ) overlaps with the symbols used by DM-RS as specified in clause 7.4.1.1.2

[0196] - Set i = 1

[0197] - In case of single symbol DM-RS, set l ref The symbol index of the DM-RS symbol. In the case of dual-symbol DM-RS, it is set to the symbol index of the second DM-RS symbol.

[0198] - As long as l ref +iL PT-RS Repeat step 2 within the PDSCH allocation

[0199] 3. Add l to the time index set of PT-RS ref +iL PT-RS

[0200] 4. i increments by 1

[0201] 5. As long as l ref +iL PT-RS Repeat step 2 above within the PDSCH allocation

[0202] Where L PT-RS ∈{1,2,4}.

[0203] The formula for determining the frequency domain position k corresponding to PTRS is as follows:

[0204]

[0205]

[0206] Wherein, i=0, 1, 2... (RB offset where PTRS exists).

[0207] It is the subcarrier offset corresponding to the DMRS port associated with the PTRS port in each RB where the PTRS exists. As shown in Table 4, the option column corresponding to "offset00" is determined by the resourceElementOffset field in the high-level parameter 'PTRS-DownlinkConfig'. If this field is not included in the high-level parameter, the default is The value is "offset00".

[0208] n RNTI It is the RNTI value corresponding to the current DCI scheduling.

[0209] N RB It is the number of RBs scheduled at that time.

[0210] K PT-RS ∈{2,4} is the PTRS frequency domain density (RB density) defined in 38214.

[0211] Table 4 Subcarrier offset

[0212]

[0213] The candidate DMRS ports that the PTRS port can bind to as specified in the current NR protocol are shown above. For example, for Type 1 DMRS, the candidate DMRS ports that the PTRS port can bind to are 0, 1, 2, and 3; for Type 2 DMRS, the candidate DMRS ports that the PTRS port can bind to are 0, 1, 2, 3, 4, and 5.

[0214] Corresponding to the frequency domain density K and time domain density L in the time-frequency resources occupied by the above PTRS port, the NR protocol defines its value range as shown in Table 5 and Table 6 below.

[0215] Among them, l MCS is the MCS for the current scheduling, and ptrs-MCS1~4 is the MCS threshold range configured by the higher layer.

[0216] L is the time domain density of the aforementioned PTRS resource, indicating the symbol interval at which PTRS appears in a resource unit (such as a time slot). A value of 1 means that PTRS sends PTRS in each time domain OFDM symbol.

[0217] N RB is the number of RBs scheduled at this time, N RB0～1 RB threshold range configured for the higher layer.

[0218] K is the frequency domain density of the aforementioned PTRS resources, indicating the RB interval at which PTRS appears within a scheduling bandwidth. A value of 2 means that PTRS is sent once on every two frequency domain RBs.

[0219] Table 5 Values ​​of time domain density

[0220] Scheduled MCS <![CDATA[Time density(L PT-R S)]]> <![CDATA[I MCS <ptrs-MCS1]]> PT-RS is not present <![CDATA[ptrs-MCS1≤I MCS <ptrs-MCS2]]> 4 <![CDATA[ptrs-MCS2≤I MCS <ptrs-MCS3]]> 2 <![CDATA[ptrs-MCS3≤I MCS <ptrs-MCS4]]> 1

[0221] Table 6 Frequency domain density values

[0222] Scheduled bandwidth <![CDATA[Frequency density(K PT-RS )]]> <![CDATA[N RB <N RB0 ]]> PT-RS is not present <![CDATA[N RB0 ≤N RB <N RB1 ]]> 2 <![CDATA[N RB1 ≤N RB ]]> 4

[0223] For the above PTRS resource mapping and the corresponding candidate DMRS port binding relationship, the NR standard also defines a method for indicating the candidate DMRS port of the PTRS port mapping, for example, through DCI indication. For example, the DCI may include 0 or 2 bits.

[0224] 0 bit: When the PTRS-UplinkConfig field does not exist or maxRank=1, since no PTRS port is configured or there is only one candidate DMRS port, there is no need to associate the PTRS port with the DMRS port.

[0225] 2bit: Select a table based on the maximum number of PTRS ports configured in the PTRS-UplinkConfig field. The corresponding table can be Table 7 or Table 8.

[0226] Among them, Table 7 corresponds to the configuration of PTRS port number 1, by indicating one of the maximum 4 candidate DMRS ports, the DMRS port index bound to the PTRS port is determined, and the PTRS sequence and time-frequency resource mapping method are determined according to the DMRS port index and PTRS time-frequency resource mapping rules. Table 8 corresponds to the configuration of PTRS port number 2.

[0227] Table 7 Optional DMRS ports when the number of PTRS ports is 1

[0228]

[0229] Table 8 Optional DMRS ports when the number of PTRS ports is 2

[0230]

[0231] According to the existing NR protocol, the configuration scenario with PTRS port number of 2 generally appears in the partial-coherent and non-coherent uplink codebook transmission (UL Codebook baasedtransmission) mode, and correspondingly, the above-mentioned PTRS port number of 1 generally appears in the full-coherent uplink codebook transmission mode. Among them, full coherence means that all antenna ports can send the same stream data, partial coherence means that some antenna ports can send the same stream data, and non-coherence means that each antenna port can only send one stream of data.

[0232] For partially coherent and incoherent uplink codebook transmission, the actual number of PTRS ports sent depends on the maximum number of uplink TPMI morphological Hull streams. For example, for partially coherent and incoherent antenna configurations, PUSCH ports 0 and 2 share PTRS port 0, and PUSCH ports 1 and 3 share PTRS port 1 (it can be understood that this determines the mapping of PUSCH ports to PTRS ports, and on which PUSCH port PTRS is sent); at the same time, PTRS port 0 is associated with the uplink xth stream, and PTRS port 1 is associated with the uplink yth stream, and x and y are determined by the above Table 8, that is, indicated by DCI.

[0233] At present, in the transmission of DMRS, resource collisions between DMRS and DMRS sent by different network devices and between DMRS and data can be avoided. For example, the actual number of pre-DMRS symbols, the actual number of additional DMRS symbols, the actual DMRS symbol position and the DMRS configuration type are constrained. However, there are currently no constraints on the transmission of PTRS, and there is a possibility of collision between PTRS sent by different network devices, which affects channel estimation. The impact is particularly serious under high-frequency MCS.

[0234] In view of this, an embodiment of the present application proposes a communication method, which can avoid the collision of PTRS sent by different TRPs. Figure 3 As shown, taking the terminal device, TRP1 and TRP2 as examples of communication subjects, the method includes the following steps:

[0235] 310. TRP1 sends a first PTRS to the terminal device, and correspondingly, the terminal device receives the first PTRS.

[0236] For example, TRP 1 sends a first PTRS to the terminal device on the first resource. In other words, TRP 1 sends the first PTRS through the first resource. In other words, the first PTRS corresponds to the first resource. In other words, the first PTRS is transmitted through the first resource.

[0237] 320. TRP 2 sends a second PTRS to the terminal device, and correspondingly, the terminal device receives the second PTRS.

[0238] For example, TRP 2 sends the second PTRS on the second resource. In other words, TRP 2 sends the second PTRS through the second resource. In other words, the second PTRS is transmitted through the second resource.

[0239] Optionally, the terminal device may obtain resource information of the PTRS before receiving the PTRS.

[0240] The resource information of the PTRS includes information of a first resource and information of a second resource.

[0241] It should be understood that the first resource includes time domain resources and frequency domain resources, and the second resource includes time domain resources and frequency domain resources. The first resource and the second resource may be different. The first resource and the second resource may be different in that: the time domain resource of the first resource is different from the time domain resource of the second resource, or the frequency domain resource of the first resource is different from the frequency domain resource of the second resource, or the time domain resource and the frequency domain resource of the first resource are different from the time domain resource and the frequency domain resource of the second resource.

[0242] The first PTRS corresponds to the first spatial parameter information, such as the first transmission configuration indication (TCI). The first spatial parameter information is used to transmit a first type of signal / channel, and the first type of signal / channel includes at least one of a sounding reference signal SRS, a channel state information reference signal CSI-RS, a physical uplink control channel PUCCH, a physical downlink shared channel PDSCH, a physical downlink control channel PDCCH, a physical uplink shared channel PUSCH, a phase tracking reference signal PTRS, a demodulation reference signal DMRS, a tracking reference signal TRS, or a synchronization signal block SSB. The first spatial parameter information is indicated by the first indication information.

[0243] In a possible implementation, the first indication information is DCI. That is, the first spatial parameter information is indicated by the first DCI. In other words, the first spatial parameter information is carried in the first DCI. The first DCI is sent by TRP1 to the terminal device. Optionally, the first DCI is a control resource selected from the control resource set of coreset pool index0.

[0244] In another possible implementation, the first indication information is RRC signaling. That is, the first space parameter information is indicated by the first RRC signaling. In other words, the first space parameter information is carried in the first RRC signaling. The first RRC signaling is sent by TRP1 to the terminal device.

[0245] The second PTRS corresponds to second spatial parameter information, such as a second TCI. The second spatial parameter information is used to transmit a second type of signal / channel, and the second type of signal / channel includes at least two of SRS, CSI-RS, PDSCH, PDCCH, PUSCH, PUCCH, PTRS, DMRS, TRS, or SSB. The second spatial parameter information is indicated by the second indication information.

[0246] In a possible implementation, the second indication information is DCI. That is, the second space parameter information is indicated by the second DCI. In other words, the second space parameter information is carried in the second DCI. The second DCI is sent by TRP2 to the terminal device.

[0247] In another possible implementation, the second indication information is RRC signaling. That is, the second space parameter information is indicated by the second RRC signaling. In other words, the second space parameter information is carried in the second RRC signaling. The second RRC signaling is sent by TRP1 to the terminal device.

[0248] To summarize, the first indication information is carried in RRC signaling or DCI.

[0249] Optionally, the first spatial parameter is used to transmit a first PDSCH, and the antenna port of the first PDSCH is indicated by third indication information; the second spatial parameter is used to transmit a second PDSCH, and the antenna port of the second PDSCH is indicated by fourth indication information.

[0250] The third indication information and / or the fourth indication information is carried in radio resource control RRC signaling or downlink control information DCI, or a media access control control element (media access control control element, MAC-CE).

[0251] The antenna port of the first PDSCH and the antenna port of the second PDSCH belong to different CDM groups.

[0252] The first index corresponding to the above-mentioned first PTRS is the same as the first index indicated by the first indication information.

[0253] For example, the first index may be the control resource set group index mentioned above.

[0254] One possible configuration method is to configure the first index through high-level signaling:

[0255]

[0256] Among them, the high-level configuration includes six parameters, namely: frequency domain density (frequencyDensity), time domain density (timeDensity), Epre ratio (epre-Ratio), RE offset (resourceElementOffset), control resource set index (coresetPoolIndex-r16) and maximum number of PTRS ports-r16 (maxNrofPorts-r16).

[0257] Taking the first indication information as the first DCI as an example, and taking the first index as the index of the control resource set group (coreset poolindex) as an example, for example, the index of the control resource set group corresponding to the first DCI is the same as the index of the control resource set group corresponding to the first PTRS.

[0258] For another example, taking the second indication information as the second DCI as an example, and taking the first index as the coreset pool index as an example, the index of the coreset pool corresponding to the second DCI is the same as the index of the coreset pool corresponding to the second PTRS.

[0259] The index of the control resource set group corresponding to the first DCI may be different from the index of the control resource set group corresponding to the second DCI.

[0260] Optionally, the above-mentioned first index may be indicative. For example, the terminal device receives fifth indication information, and the fifth indication information indicates the first value of the first index, and the fifth indication information is carried in the RRC signaling. For example, the RRC signaling includes configuration information of PTRS (that is, the fifth indication information is the configuration information of PTRS), such as PTRS Config, and the PTRSConfig indicates the first index. The RRC signaling may be sent by TRP to the terminal device. Similarly, the terminal device receives sixth indication information, and the sixth indication information indicates the second value of the first index. The first value of the first index corresponds to the first PTRS, and the second value of the first index corresponds to the second PTRS.

[0261] The fifth indication information is carried in RRC signaling, MAC-CE or DCI, and the sixth indication information is carried in RRC signaling, MAC-CE or DCI.

[0262] A possible way for a terminal device to obtain resource information of PTRS is: TRP sends indication information to the terminal device, and the terminal device receives the indication information, where the indication information indicates the resource information of PTRS.

[0263] For example, TRP1 sends indication information A to the terminal device, and correspondingly, the terminal device receives the indication information A. The indication information A indicates the first resource. TRP2 sends indication information B to the terminal device, and correspondingly, the terminal device receives the indication information B. The indication information B indicates the second resource.

[0264] The indication information A and / or the indication information B may be DCI. For example, the indication information A is the first DCI and the indication information B is the second DCI.

[0265] Another possible way for the terminal device to obtain the resource information of the PTRS is to predefine the first resource and the second resource.

[0266] For example, a first resource is predefined for TRP1 to send PTRS, and when TRP1 needs to send PTRS, PTRS can be sent on the first resource. A second resource is predefined for TRP2 to send PTRS, and when TRP2 needs to send PTRS, PTRS can be sent on the second resource.

[0267] The terminal device receives the PTRS according to the predefined resource information. For example, the terminal device determines on which resource to receive the PTRS according to the association between the identifier of the TRP and the resource of the PTRS.

[0268] Another possible way for the terminal device to obtain the resource information of PTRS is that the first resource is predefined, that is, the location of the first resource can be predetermined by both TRPs; in this case, the second PTRS port scheduled by the second DCI avoids the location of the first resource. That is, the second resource is determined based on the first resource.

[0269] Specifically, the method for determining PTRS resources is described in detail below.

[0270] Optionally, 330, TRP 1 sends first data to the terminal device, and correspondingly, the terminal device receives the first data.

[0271] For example, TRP1 sends the first data to the terminal device on a third resource, and the third resource is different from the first resource and the second resource.

[0272] Optionally, 340, TRP 2 sends second data to the terminal device, and correspondingly, the terminal device receives the second data

[0273] For example, TRP2 sends the second data to the terminal device on the fourth resource, and the fourth resource is different from the third resource, the first resource, and the second resource.

[0274] In this method, the terminal device obtains the resource information of PTRS by indication or pre-definition. In a multi-TRP scenario, different TRPs send different resources of PTRS, which can avoid collision between PTRSs, thereby improving communication performance.

[0275] The manner of determining PTRS resources in this method is described in detail below.

[0276] The above-mentioned first resource and / or second resource is associated with the identifier of the TRP participating in the communication.

[0277] For example, multiple TRPs are associated with their respective corresponding resources. For example, the first resource is associated with the identifier of TRP1, and the second resource is associated with the identifier of TRP2. When TRP1 communicates with a terminal device, such as when TRP1 sends a first PTRS to the terminal device, the terminal device determines the identifier of the TRP, and can further be associated with the resource from which the TRP sends the first PTRS, that is, the first resource. The terminal device receives the first PTRS on the first resource. Similarly, the terminal device is associated with the resource from which TRP2 sends the second PTRS based on the identifier of TRP2, and receives the second PTRS on the second resource.

[0278] It should be understood that the first resource includes time domain resources and frequency domain resources, and the second resource includes time domain resources and frequency domain resources. The following describes the determination methods of time domain resources and frequency domain resources respectively.

[0279] Method 1: pre-define time domain resources and frequency domain resources.

[0280] 1. Time domain resources

[0281] Each TRP sends PTRS according to a predefined time domain density.

[0282] For example, the time domain density of the predefined TRP for sending PTRS is 1. Assuming that the symbol is used as an example of the time domain unit, the time domain density of 1 means that each TRP sends PTRS on each symbol. For example, taking TRP1 as an example, the time domain resources include symbol 1, symbol 2, symbol 3 and symbol 4. TRP1 sends PTRS on symbol 1, symbol 2, symbol 3 and symbol 4. Correspondingly, the terminal device receives PTRS on symbol 1, symbol 2, symbol 3 and symbol 4.

[0283] It should be understood that the time domain density of 1 is only an example of the value of the time domain density.

[0284] In the above example, the predefined time domain density of each TRP is the same, which is 1. It should also be understood that the predefined time domain density may be different for different TRPs. For example, the predefined time domain density of TRP1 is 1, the predefined time domain density of TRP2 is 2, the predefined time domain density of TRP3 is 4, and so on.

[0285] That is, for different TRPs, the time domain resources used to send PTRS can be the same or different.

[0286] For example, the time domain density of the first resource is associated with a first index, and / or the time domain density of the second resource is associated with a second index, and the first index and / or the second index may be configured by a high level. The first index and / or the second index may be an index of a control resource set group.

[0287] Among them, the time domain density of the first resource is the time domain density of the antenna port of the first PTRS, and the time domain density of the second resource is the time domain density of the antenna port of the second PTRS. The time domain resource of the first resource is determined according to the first time domain density, and the time domain resource of the second resource is determined according to the second time domain density. In other words, the first resource is associated with the first time domain density; the second resource is associated with the second time domain density.

[0288] The first time domain density is indicated by PTRS configuration information, and the PTRS configuration information is carried in RRC signaling; or, the first time domain density is a predefined first time domain density value.

[0289] The PTRS configuration information can be understood as high-level signaling, such as PTRS-DownlinkConfig or PTRS-UplinkConfig.

[0290] 2. Frequency domain resources

[0291] Among them, frequency domain density, RB offset and RE offset all affect the determination of frequency domain resources.

[0292] A: Frequency domain density

[0293] Each TRP sends PTRS according to a predefined frequency domain density.

[0294] The frequency domain densities predefined by different TRPs may be the same or different.

[0295] For example, the predefined frequency domain density of TRP1 is 2, and the predefined frequency domain density of TRP2 is also 2.

[0296] In a possible implementation, the value of the frequency domain density (ie, the first value or the second value) may be predefined.

[0297] In another possible implementation, the frequency domain density is related to the number of TRPs participating in the communication. For example, if four TRPs send PTRS to the terminal device, the frequency domain density can be predefined as 4. Taking subcarriers as an example of frequency domain units, a frequency domain density of 4 means that PTRS is sent once on every 4 subcarriers. This can avoid possible conflicts in frequency domain resources when different TRPs send PTRS.

[0298] For example, TRP1 sends PTRS on the first subcarrier of 4 subcarriers, TRP2 sends PTRS on the second subcarrier of 4 subcarriers, TRP3 sends PTRS on the third subcarrier of 4 subcarriers, and TRP4 sends PTRS on the fourth subcarrier of 4 subcarriers.

[0299] That is, the frequency domain density of the antenna port of the first PTRS is the first frequency domain density, the first resource is associated with the first frequency domain density, the first frequency domain density is predefined, or the first frequency domain density is determined according to the number of network devices participating in the communication, and / or,

[0300] The frequency domain density of the antenna port of the second PTRS is the second frequency domain density, the second resource is associated with the second frequency domain density, the second frequency domain density is predefined, or the second frequency domain density is determined according to the number of network devices participating in the communication.

[0301] The frequency domain resources of the first resources are determined according to the first frequency domain density value, and / or the frequency domain resources of the second resources are determined according to the second frequency domain density value.

[0302] B: RB offset

[0303] The RB offset indicates the offset of the frequency domain resources corresponding to a certain TRP relative to the starting position of the frequency domain resources configured for sending PTRS. The starting position here can be the starting RB of the PDSCH transmission, or it can be a fixed frequency domain position such as a common RB or point0. For example, the starting position of the frequency domain resources configured for sending PTRS is the first RB scheduled by PDSCH. For example, the frequency domain resources configured for sending PTRS are RB1 to RB4, RB1 can be used as the starting position, the frequency domain resource configured for TRP2 is RB2, then the RB offset corresponding to TRP2 is 1 RB; the frequency domain resource configured for TRP3 is RB3, then the RB offset corresponding to TRP3 is 2 RBs; the frequency domain resource configured for TRP4 is RB4, then the RB offset corresponding to TRP4 is 3 RBs. The standard is generally defined as

[0304] In one possible implementation, the RB offset is associated with an identifier of the TRP, such as the TRP ID, or the RB offset is associated with coresetPoolIndex.

[0305] For example, the RB offset and the TRP ID satisfy the following relationship:

[0306]

[0307]

[0308] Wherein, i=0, 1, 2... (RB offset where PTRS exists).

[0309] It is the subcarrier offset corresponding to the DMRS port associated with the PTRS port in each RB where the PTRS exists. As shown in Table 4, the option column corresponding to "offset00" is determined by the resourceElementOffset field in the high-level parameter 'PTRS-DownlinkConfig'. If this field is not included in the high-level parameter, the default is The value is "offset00".

[0310] coresetpoolindex is the control resource set index.

[0311] N RB It is the number of RBs scheduled at that time.

[0312] K PT-RS ∈{2,4} is the PTRS frequency domain density (RB density) defined in 38214.

[0313] The PTRS port time-frequency resource mapping method can be referred to the previous description, which will not be repeated here.

[0314] Alternatively, the RB offset represents the offset of the starting position of the frequency domain resources corresponding to all TRPs relative to the starting position of the configured frequency domain resources. For example, RB1 to RB12 are configured for this information transmission, of which RB5 is used to transmit PTRS. RB1 is the starting position of the configured frequency domain resources, and the RB offset of the RB used to transmit PTRS (i.e., RB5) relative to RB1 is 4 RBs.

[0315] In the present application, the RB offset of the first resource is the first offset, and the RB offset of the second resource is the second offset.

[0316] C: RE offset

[0317] The RE offset is the offset of the RE used to send PTRS relative to the starting RE in an RB. The starting RE is the first RE in the RB, or the starting RE of the DMRS port associated with the PTRS in the RB, or the starting RE corresponding to the DMRS port. For example, RB2 includes 12 REs, and the RE used for TRP1 to send PTRS is RE3, and the offset of RE3 relative to the starting RE is 2 REs. The standard is generally defined as

[0318] Optionally, the RE offset can be predefined or configured by a high-level configuration. For example, the RE offset is configured by a high-level configuration as offset00 in Table 4. Corresponding to different ports, the RE offset is different. The RE offset can be understood as the offset correspondence of the high-level configuration. Specifically, the RE offset is defined above.

[0319] In a possible implementation, the port for sending PTRS is predefined. The ports corresponding to the multiple TRPs belong to different CDM groups. The first PTRS is associated with the first antenna port, and the second PTRS is associated with the second antenna port, or in other words, the antenna port of the first PTRS is the first antenna port, and the antenna port of the second PTRS is the second antenna port.

[0320] The association relationship between the first PTRS and the first antenna port and / or the association relationship between the second PTRS and the second antenna port is configured at a high level or is predefined. The first antenna port is a DMRS port corresponding to the first network device, and the second antenna port is a DMRS port corresponding to the second network device. The first antenna port and the second antenna port belong to different CDM groups respectively.

[0321] Optionally, the first antenna port is the port with the smallest port index in the first CDM group, the first CDM group is the CDM group to which the first antenna port belongs, the second antenna port is the port with the smallest port index in the second CDM group, and the second CDM group is the CDM group to which the second antenna port belongs.

[0322] For example, the port corresponding to each TRP may be the port with the smallest port index in the CDM group to which the port belongs. For example, the port corresponding to TRP1 belongs to CDM group 1, and the port corresponding to TRP2 belongs to CDM group 2. The ports included in CDM group 1 are port 1, port 2, port 3, and port 4, and TRP1 corresponds to port 1; the ports included in CDM group 2 are port 5, port 6, port 7, and port 8, and TRP2 corresponds to port 5.

[0323] Optionally, the first antenna port is the antenna port with the smallest index among the antenna ports of the first PDSCH, and the second antenna port is the antenna port with the smallest index among the antenna ports of the second PDSCH.

[0324] In summary, the time domain resources and frequency domain resources for TRP to send PTRS are predefined, and the terminal device receives the PTRS sent by the corresponding TRP on the corresponding resources. Among them, the time domain resources can be determined based on the time domain density, and the frequency domain resources can be determined based on the frequency domain density, RB offset and RE offset.

[0325] Method 2: Predefine candidates for time domain resources and frequency domain resources, and the terminal device determines the time domain resources and frequency domain resources for TRP to send PTRS based on DCI.

[0326] The time domain density of the first resource and / or the time domain density of the second resource is determined from at least one candidate time domain density, at least one candidate time domain density is predefined, and the time domain density of the first resource and / or the time domain density of the second resource is configured at a high level.

[0327] For example, the high-level configuration has different candidates for the time domain density of TRP. For example:

[0328] TRP1: {timedensity1: n1, n2, n4};

[0329] TRP2: {timedensity2: n1, n2, n4}.

[0330] Among them, n1, n2, and n4 are different values ​​of time domain density, for example, n1 is 1, n2 is 2, and n4 is 4.

[0331] The time domain densities of TRP1 and TRP2 may be the same, for example, both are n1. The time domain densities of TRP1 and TRP2 may be different, for example, the time domain density of TRP1 is n1, and the time domain density of TRP2 is n2.

[0332] The frequency domain density is also configured by a high-level layer. The frequency domain density of the first resource and / or the frequency domain density of the second resource is determined from at least one candidate frequency domain density. At least one candidate frequency domain density is predefined. The frequency domain density of the first resource and / or the frequency domain density of the second resource is configured by a high-level layer.

[0333] for example:

[0334] TRP1: {freqdensity1: n2, n4};

[0335] TRP2:{freqdensity2:n2,n4}.

[0336] Among them, n2 and n4 are different values ​​of time domain density, for example, n2 is 2, and n4 is 4.

[0337] The frequency domain densities of TRP1 and TRP2 are the same, for example, both are n2, or both are n4.

[0338] At the same time, the RB offset and RE offset are also configured by the higher layer, for example:

[0339] TRP1RB offset {RB offset: n1, n2, n3, n4};

[0340] TRP2 RB offset {RB offset: n1, n2, n3, n4}.

[0341] Among them, n1, n2, and n4 are different values ​​of RB offsets, for example, n1 is 1, n2 is 2, n3 is 3, and n4 is 4. Each value represents an offset, that is, the number of offset RBs.

[0342] The offset of RE included in the frequency domain resources of the first resource within the RB, and / or the offset of RE included in the frequency domain resources of the second resource within the RB are determined from at least one third candidate offset, at least one third candidate offset is predefined, and the offset of RE included in the frequency domain resources of the first resource within the RB, and / or the offset of RE included in the frequency domain resources of the second resource within the RB are configured by a high level.

[0343] for example:

[0344] TRP1RE offset {RE offset: offset00, offset01, offset10, offset11};

[0345] TRP2RE offset {RE offset: offset00, offset01, offset10, offset11}.

[0346] Among them, offset00, offset01, offset10, and offset11 can refer to the configuration in Table 4 above, and will not be repeated here.

[0347] The first offset is determined from at least one first candidate offset, the first offset is the RB offset of the first resource, and the second offset is determined from at least one second candidate offset, the second offset is the RB offset of the second resource. At least one first candidate offset or at least one second candidate offset is predefined, and the first offset and / or the second offset is configured by a high level.

[0348] In one possible implementation, the TRP sends a DCI to the terminal device, where the DCI indicates a value among the above-mentioned candidates so that the terminal device can determine the time domain resources and frequency domain resources for receiving the PTRS.

[0349] Further, it is divided into the following two cases:

[0350] Case 1: In a non-ideal backhaul scenario, TRPs can exchange the configuration of the time domain resources and frequency domain resources corresponding to each TRP.

[0351] Assuming that the terminal device receives multiple PDSCHs scheduled by multiple DCIs, for the resource conflict (overlap) part, the resource configuration of PTRS is directly determined according to the above high-level configuration.

[0352] Case 2: In the ideal backhaul scenario, assuming that TRP can exchange real-time PDSCH scheduling information (including MCS, number of RBs, etc.) for each TRP, the terminal device determines the PTRS time-frequency resources through each DCI. For example, the DCI indicates one of the above configuration options, and the terminal device determines the time domain density, frequency domain density, RB offset and RE offset according to the DCI, and further determines the time domain resources and frequency domain resources of the PTRS.

[0353] It should be understood that the above PTRS is sent through the port of DMRS, and the resources of PTRS and DMRS, as well as the resources of PTRS and data are different, that is, PTRS and DMRS, data, etc. can avoid resource collision.

[0354] In this method, PTRS time-frequency resources corresponding to different TRPs are predefined, or PTRS time-frequency resources corresponding to different TRPs are configured at a high level to avoid resource collisions between PTRSs sent by different TRPs, facilitate correct reception of PTRS by terminal devices, and further improve the accuracy of channel estimation.

[0355] It should also be understood that in some of the above embodiments, the reference signal is mainly PTRS as an example for illustrative description, and no limitation is made thereto. Other reference signals may also be applicable to the embodiments of the present application.

[0356] It should also be understood that the formulas involved in the various embodiments of the present application are exemplary illustrations and do not limit the protection scope of the embodiments of the present application. In the process of calculating the above-mentioned parameters, the calculation can also be performed according to the above-mentioned formula, or based on the deformation of the above-mentioned formula, or according to the formula determined by the method provided in the embodiments of the present application, or according to other methods to satisfy the result of the formula calculation.

[0357] It should also be understood that the rounding methods involved in the formulas involved in the various embodiments of the present application are mainly illustrated by taking rounding down as an example, and are not limited to this. Other rounding methods, such as rounding up or rounding off, etc., can also be applied to the embodiments of the present application.

[0358] It can be understood that in the above-mentioned various method embodiments, the methods and operations implemented by the communication device (such as network equipment or terminal equipment) can also be implemented by components (such as chips or circuits) that can be used in the communication device.

[0359] Combination of the above Figure 3 The method of this application is described in detail. Figures 4 to 6 It should be understood that the description of the device embodiment corresponds to the description of the method embodiment, so the contents not described in detail can be referred to the method embodiment above, and will not be repeated here for the sake of brevity.

[0360] Figure 4 Schematic diagram of a communication device provided in an embodiment of the present application. Figure 4 As shown, the communication device 2000 may include a receiving unit 2100 and a sending unit 2200. Optionally, the communication device may further include a processing unit 2200.

[0361] The receiving unit 2100 may be a receiver, an input interface, a pin or a circuit, etc. The receiving unit 2100 may be used to perform the receiving step in the above method embodiment.

[0362] The sending unit 2200 may be a transmitter, an output interface, a pin or a circuit, etc. The sending unit 2200 may be used to perform the receiving step in the above method embodiment.

[0363] It should be understood that the receiving unit 2100 and the sending unit 2200 can be combined into a transceiver unit. The transceiver unit may include a sending unit and / or a receiving unit. The transceiver unit may be a transceiver (including a transmitter and / or a receiver), an input / output interface (including an input and / or output interface), a pin or a circuit, etc.

[0364] The processing unit 2300 may be a processor (may include one or more), a processing circuit with processor functions, etc., and may be used to execute other steps except sending and receiving in the above method embodiment.

[0365] Optionally, the communication device may further include a storage unit, which may be a memory, an internal storage unit (e.g., a register, a cache, etc.), an external storage unit (e.g., a read-only memory, a random access memory, etc.), etc. The storage unit is used to store instructions, and the processing unit 530 executes the instructions stored in the storage unit so that the communication device executes the above method.

[0366] In one possible design, the communication device 2000 may correspond to the terminal device in the above method embodiment, and may execute the operations performed by the terminal device in the above method.

[0367] In one example, the receiving unit 2100 is used to receive a reference signal, such as a PTRS, and perform channel estimation after decoding the reference signal. The receiving unit 2100 can also be used to receive indication information, such as first indication information, second indication information, third indication information, fourth indication information, etc.

[0368] In another possible design, the communication device 2000 may correspond to the sending device in the above method embodiment, such as TRP, and may perform the operations performed by the sending device in the above method.

[0369] In one example, the processing unit 2300 generates a reference signal and determines time domain resources and frequency domain resources.

[0370] The sending unit 2200 sends a reference signal, such as a PTRS. The sending unit 2200 may also be used to send indication information, such as first indication information, second indication information, third indication information, fourth indication information, and the like.

[0371] It should be understood that the division of the above-mentioned units is merely a functional division, and there may be other division methods in actual implementation.

[0372] It should also be understood that the above-mentioned processing unit can be implemented by hardware or software, or can be implemented by a combination of hardware and software.

[0373] It should also be understood that when the communication device 2000 is a network device, the receiving unit 2100 and the sending unit 2200 in the communication device may correspond to Figure 5 The RRU 3100 in the network device 2000 shown in FIG. 1 may correspond to the processing unit 2300 in the communication device. Figure 5 3. When the communication device 2000 is a chip configured in the network device, the transceiver unit 2100 in the communication device may be an input / output interface.

[0374] It should also be understood that when the communication device 2000 is a terminal device, the receiving unit 2100 and the sending unit 2200 in the communication device 2000 may correspond to Figure 6 The transceiver 4002 in the terminal device 4000 shown in FIG. 4 , the processing unit 2300 in the communication device 2000 may correspond to Figure 6 Processor 4001 in terminal device 4000 shown in FIG.

[0375] Figure 5 3000 is a schematic diagram of the structure of a network device provided in an embodiment of the present application, for example, a schematic diagram of the structure of a base station. The network device 3000 can perform the functions of the network device in the above method embodiment.

[0376] As shown in the figure, the network device 3000 may include one or more radio frequency units, such as a remote radio unit (RRU) 3100 and one or more baseband units (BBU) (also referred to as distributed units (DU)) 3200. The RRU 3100 may be referred to as a transceiver unit or a communication unit. Figure 4 Corresponding to the transceiver unit 2100 in.

[0377] Optionally, the transceiver unit 3100 may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., and may include at least one antenna 3101 and a radio frequency unit 3102. Optionally, the transceiver unit 3100 may include a receiving unit and a sending unit, the receiving unit may correspond to a receiver (or receiver, receiving circuit), and the sending unit may correspond to a transmitter (or transmitter, transmitting circuit). The RRU 3100 part is mainly used for receiving and sending radio frequency signals and converting radio frequency signals to baseband signals. The BBU 3200 part is mainly used for baseband processing, controlling the base station, etc. The RRU 3100 and the BBU 3200 may be physically arranged together or physically separated, that is, a distributed base station.

[0378] The BBU 3200 is the control center of the base station, which can also be called a processing unit. Figure 4 The processing unit 2200 in the embodiment corresponds to the baseband processing unit 2200, which is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spread spectrum, etc. For example, the BBU (processing unit) can be used to control the base station to execute the operation flow of the network device in the above method embodiment.

[0379] In one example, the BBU 3200 may be composed of one or more single boards, and multiple single boards may jointly support a wireless access network of a single access standard (such as an LTE network), or may respectively support wireless access networks of different access standards (such as an LTE network, a 5G network, or other networks). The BBU 3200 also includes a memory 3201 and a processor 3202. The memory 3201 is used to store necessary instructions and data. The processor 3202 is used to control the base station to perform necessary actions, for example, to control the base station to execute the operation process of the network device in the above method embodiment. The memory 3201 and the processor 3202 can serve one or more single boards. In other words, a memory and a processor may be separately set on each single board. It is also possible that multiple single boards share the same memory and processor. In addition, necessary circuits may also be set on each single board.

[0380] It should be understood that Figure 5 The network device 3000 shown can implement various processes related to the network device in the aforementioned method embodiment. The operations or functions of each module in the network device 3000 are respectively to implement the corresponding processes in the aforementioned method embodiment. For details, please refer to the description in the aforementioned method embodiment. To avoid repetition, the detailed description is appropriately omitted here.

[0381] The BBU 3200 can be used to perform the actions implemented by the network device described in the previous method embodiment, and the RRU 3100 can be used to perform the actions of sending and receiving by the network device described in the previous method embodiment. Please refer to the description in the previous method embodiment for details, which will not be repeated here.

[0382] Figure 6 4 is a schematic diagram of the structure of the terminal device 4000 provided in an embodiment of the present application. As shown in the figure, the terminal device 4000 includes a processor 4001 and a transceiver 4002. Optionally, the terminal device 4000 may also include a memory 4003. The processor 4001, the transceiver 4002 and the memory 4003 may communicate with each other through an internal connection path to transmit control and / or data signals, and the memory 4003 is used to store a computer program, and the processor 4001 is used to call and run the computer program from the memory 4003 to control the transceiver 4002 to send and receive signals.

[0383] The processor 4001 and the memory 4003 can be combined into a processing device 4004, and the processor 4001 is used to execute the program code stored in the memory 4003 to implement the above functions. It should be understood that the processing device 4004 shown in the figure is only an example. In a specific implementation, the memory 4003 can also be integrated into the processor 4001, or independent of the processor 4001. This application does not limit this.

[0384] The terminal device 4000 may further include an antenna 4010 for transmitting the uplink data or uplink control signaling output by the transceiver 4002 via a wireless signal.

[0385] It should be understood that Figure 6 The terminal device 4000 shown can implement various processes related to the terminal device in the aforementioned method embodiment. The operations or functions of each module in the terminal device 4000 are respectively to implement the corresponding processes in the aforementioned method embodiment. For details, please refer to the description in the aforementioned method embodiment. To avoid repetition, the detailed description is appropriately omitted here.

[0386] Optionally, the terminal device 4000 may further include a power supply 4005 for providing power to various devices or circuits in the terminal device.

[0387] In addition, in order to make the functions of the terminal device more complete, the terminal device 4000 may also include one or more of an input unit 4006, a display unit 4007, an audio circuit 4008, a camera 4009 and a sensor 4011, and the audio circuit may also include a speaker 40081, a microphone 40082, etc.

[0388] It should be understood that the processing device 4004 or the processor 4001 can be a chip. For example, the processing device 4004 or the processor 4001 can be a field programmable gate array (FPGA), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), a microcontroller unit (MCU), a programmable logic device (PLD) or other integrated chips. A general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or being executed by a combination of hardware and software modules in a decoding processor. The software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0389] The memory in the present application (such as memory 4003) can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus random access memory (DR RAM).

[0390] According to the method provided in the embodiment of the present application, the present application also provides a computer program product, which includes: a computer program code, when the computer program code is run on a computer, the computer executes the method executed by the aforementioned terminal device.

[0391] According to the method provided in the embodiment of the present application, the present application also provides a computer program product, which includes: a computer program code, when the computer program code is run on a computer, the computer executes the method executed by the aforementioned network device.

[0392] According to the method provided in the embodiment of the present application, the present application also provides a computer-readable medium, which stores a program code. When the program code runs on a computer, the computer executes the method executed by the aforementioned terminal device.

[0393] According to the method provided in the embodiment of the present application, the present application also provides a computer-readable medium, which stores a program code. When the program code runs on a computer, the computer executes the method executed by the aforementioned network device.

[0394] According to the method provided in the embodiment of the present application, the present application also provides a system, which includes a network device. Optionally, the system may also include a terminal device.

[0395] An embodiment of the present application also provides a processing device, including a processor and an interface; the processor is used to execute the method in any of the above method embodiments.

[0396] It should be understood that the above-mentioned processing device can be a chip. For example, the processing device can be a field programmable gate array (FPGA), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), a microcontroller unit (MCU), a programmable logic device (PLD) or other integrated chips. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware decoding processor to be executed, or the hardware and software modules in the decoding processor are combined to be executed. The software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0397] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disc (SSD)).

[0398] The terms "component", "module", "system", etc. used in this specification are used to represent computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, or a computer. By way of illustration, both applications running on a computing device and a computing device can be components. One or more components may reside in a process or an execution thread, and a component may be located on a computer or distributed between two or more computers. In addition, these components may be executed from various computer-readable media having various data structures stored thereon. Components may communicate, for example, through local or remote processes based on signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system, or a network, such as the Internet interacting with other systems through signals).

[0399] It should be understood that the "embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the various embodiments in the entire specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0400] It should be understood that in the embodiments of the present application, the numbers "first", "second"... are only for distinguishing different objects, such as distinguishing different network devices, and do not constitute a limitation on the scope of the embodiments of the present application. The embodiments of the present application are not limited to this.

[0401] It should also be understood that in the present application, "when", "if" and "if" all mean that the network element will take corresponding actions under certain objective circumstances, and do not limit the time, nor do they require the network element to have a judgment action when implementing it, nor do they mean that there are other limitations.

[0402] It should also be understood that, in the present application, “at least one” means one or more, and “more than one” means two or more.

[0403] It should also be understood that in each embodiment of the present application, "A corresponds to B" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, and B can also be determined according to A and / or other information.

[0404] It should also be understood that the term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0405] The meaning of expressions similar to "the project includes one or more of the following: A, B, and C" in this application, unless otherwise specified, generally means that the project can be any of the following: A; B; C; A and B; A and C; B and C; A, B and C; A and A; A, A and A; A, A and B; A, A and C, A, B and B; A, C and C; B and B, B, B and B, B, B and C, C and C; C, C and C, and other combinations of A, B and C. The above is an example of three elements, A, B and C, to illustrate the optional items of the project. When it is expressed as "the project includes at least one of the following: A, B, ..., and X", that is, when there are more elements in the expression, the items that can be applied to the project can also be obtained according to the above rules.

[0406] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0407] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0408] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0409] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0410] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0411] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories ROM, random access memories RAM, magnetic disks or optical disks.

[0412] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A communication method, characterized in that: include: receiving a first phase tracking reference signal PTRS, wherein the first PTRS is transmitted via a first resource; receiving a second PTRS, wherein the second PTRS is transmitted via a second resource, The first PTRS corresponds to first space parameter information, and the first space parameter information is indicated by first indication information. The second PTRS corresponds to second space parameter information, and the second space parameter information is indicated by second indication information.

2. The method according to claim 1, characterized in that The first spatial parameter is used to transmit at least one of a sounding reference signal SRS, a channel state information reference signal CSI-RS, a physical uplink control channel PUCCH, a physical downlink shared channel PDSCH, a physical downlink control channel PDCCH, a physical uplink shared channel PUSCH, a phase tracking reference signal PTRS, a demodulation reference signal DMRS, a tracking reference signal TRS, or a synchronization signal block SSB; The second spatial parameter is used to transmit at least one of SRS, CSI-RS, PDSCH, PDCCH, PUSCH, PUCCH, PTRS, DMRS, TRS or SSB.

3. The method according to claim 1 or 2, characterized in that: The first spatial parameter is used to transmit a first PDSCH, and the antenna port of the first PDSCH is indicated by third indication information; The second spatial parameter is used to transmit a second PDSCH, and the antenna port of the second PDSCH is indicated by fourth indication information.

4. The method according to claim 3, characterized in that The antenna port of the first PDSCH and the antenna port of the second PDSCH belong to different code division multiplexing (CDM) groups.

5. The method according to claim 3 or 4, characterized in that: The third indication information and / or the fourth indication information is carried in radio resource control RRC signaling or downlink control information DCI, or media access control element MAC-CE.

6. The method according to any one of claims 1 to 5, characterized in that The first index corresponding to the first PTRS has the same value as the first index corresponding to the first indication information, and / or the first index corresponding to the second PTRS has the same value as the first index indicated by the second indication information.

7. The method according to claim 6, characterized in that The method further comprises: receiving fifth indication information, where the fifth indication information indicates a first value of the first index, Sixth indication information is received, where the sixth indication information indicates a second value of the first index.

8. The method according to claim 7, characterized in that The fifth indication information is carried in RRC signaling, MAC-CE or DCI, and the sixth indication information is carried in RRC signaling, MAC-CE or DCI.

9. The method according to any one of claims 1 to 8, characterized in that The time domain density of the antenna port of the first PTRS is a first time domain density, the first resource is associated with the first time domain density, the first time domain density is indicated by PTRS configuration information, the PTRS configuration information is carried in RRC signaling, or the first time domain density is predefined.

10. The method according to any one of claims 1 to 9, characterized in that The time domain density of the antenna port of the second PTRS is a second time domain density, the second resource is associated with the second time domain density, the second time domain density is indicated by PTRS configuration information, the PTRS configuration information is carried in RRC signaling, or the second time domain density is predefined.

11. The method according to claim 10, characterized in that The time domain resources of the first resources are determined according to the first time domain density value, and / or the time domain resources of the second resources are determined according to the second time domain density value.

12. The method according to any one of claims 1 to 11, characterized in that The frequency domain density of the antenna port of the first PTRS is a first frequency domain density, the first resource is associated with the first frequency domain density, the first frequency domain density is predefined, or the first frequency domain density is associated with a third value, and / or, The frequency domain density of the antenna port of the second PTRS is a second frequency domain density, the second resource is associated with the second frequency domain density, the second frequency domain density is predefined, or the second frequency domain density is associated with a fourth value.

13. The method according to claim 12, characterized in that The third value and / or the fourth value includes at least one of the number of values ​​contained in the first index, the number of sending and receiving points TRP, or the number of network nodes.

14. The method according to claim 12 or 13, characterized in that The frequency domain resources of the first resources are determined according to the first frequency domain density value, and / or the frequency domain resources of the second resources are determined according to the second frequency domain density value.

15. The method according to any one of claims 1 to 14, characterized in that: The first offset is associated with a fifth value, wherein the fifth value includes an identifier of the first TRP and / or a value of a first index corresponding to the first TRP, The second offset is associated with a sixth value, the sixth value including an identifier of the second TRP and / or a value of a first index corresponding to the second TRP, The first offset is the RB offset of the first resource, The second offset is an RB offset of the second resource.

16. The method according to claim 15, characterized in that The offset of REs included in the frequency domain resources of the first resource within the RB and the offset of REs included in the frequency domain resources of the second resource within the RB are predefined.

17. The method according to any one of claims 1 to 16, characterized in that The antenna port of the first PTRS is a first antenna port, the antenna port of the second PTRS is a second antenna port, and the association relationship between the first PTRS and the first antenna port and / or the association relationship between the second PTRS and the second antenna port is high-level configured or predefined.

18. The method according to claim 17, characterized in that The first antenna port is the port with the smallest port index in the first CDM group, the first CDM group is the CDM group to which the first antenna port belongs, the second antenna port is the port with the smallest port index in the second CDM group, and the second CDM group is the CDM group to which the second antenna port belongs.

19. The method according to claim 17, characterized in that The first antenna port is the antenna port with the smallest index among the antenna ports of the first PDSCH, and the second antenna port is the antenna port with the smallest index among the antenna ports of the second PDSCH.

20. The method according to claim 4, characterized in that The time domain density of the first resource and / or the time domain density of the second resource is determined from at least one candidate time domain density, the at least one candidate time domain density is predefined, and the time domain density of the first resource and / or the time domain density of the second resource is configured at a high level.

21. The method according to claim 20, characterized in that The frequency domain density of the first resource and / or the frequency domain density of the second resource is determined from at least one candidate frequency domain density, the at least one candidate frequency domain density is predefined, and the frequency domain density of the first resource and / or the frequency domain density of the second resource is configured at a high level.

22. The method according to claim 20 or 21, characterized in that The time domain density of the first resource is associated with a first index corresponding to the first PTRS, and the time domain density of the second resource is associated with a first index corresponding to the second PTRS. The value of the first index is configured by a high-level layer.

23. The method according to any one of claims 20 to 22, characterized in that The first offset is determined from at least one first candidate offset, the first offset being an RB offset of the first resource, The second offset is determined from at least one second candidate offset, the second offset being an RB offset of the second resource, The at least one first candidate offset or the at least one second candidate offset is predefined, and the first offset and / or the second offset is configured by a high level.

24. The method according to claim 23, characterized in that The offset of RE included in the frequency domain resources of the first resource within the RB, and / or the offset of RE included in the frequency domain resources of the second resource within the RB are determined from at least one third candidate offset, and the at least one third candidate offset is predefined, and the offset of RE included in the frequency domain resources of the first resource within the RB, and / or the offset of RE included in the frequency domain resources of the second resource within the RB are configured by a high level.

25. A communication method, characterized in that: include: A first PTRS is sent, where the first PTRS is transmitted through a first resource, where the first PTRS corresponds to first space parameter information, and where the first space parameter information is indicated through first indication information.

26. The method according to claim 25, characterized in that The first spatial parameter is used to transmit at least one of a sounding reference signal SRS, a channel state information reference signal CSI-RS, a physical uplink control channel PUCCH, a physical downlink shared channel PDSCH, a physical downlink control channel PDCCH, a physical uplink shared channel PUSCH, a phase tracking reference signal PTRS, a demodulation reference signal DMRS, a tracking reference signal TRS, or a synchronization signal block SSB.

27. The method according to claim 25 or 26, characterized in that The first spatial parameter is used to transmit a first PDSCH, and the antenna port of the first PDSCH is indicated by third indication information.

28. The method according to any one of claims 25 to 27, characterized in that The third indication information is carried in radio resource control RRC signaling or downlink control information DCI, or media access control element MAC-CE.

29. The method according to any one of claims 25 to 28, characterized in that The first index corresponding to the first PTRS has the same value as the first index corresponding to the first indication information.

30. The method according to claim 29, characterized in that The method further comprises: Send fifth indication information, where the fifth indication information indicates a first value of the first index.

31. The method according to claim 30, characterized in that The fifth indication information is carried in RRC signaling, MAC-CE or DCI.

32. The method according to any one of claims 1 to 8, characterized in that The time domain density of the antenna port of the first PTRS is a first time domain density, the first resource is associated with the first time domain density, the first time domain density is indicated by PTRS configuration information, the PTRS configuration information is carried in RRC signaling, or the first time domain density is predefined.

33. The method according to claim 32, characterized in that The time domain resource of the first resource is determined according to the value of the first time domain density.

34. The method according to any one of claims 25 to 33, characterized in that The frequency domain density of the antenna port of the first PTRS is a first frequency domain density, the first resource is associated with the first frequency domain density, the first frequency domain density is predefined, or the first frequency domain density is associated with a third value.

35. The method according to claim 34, characterized in that The third value includes at least one of the number of values ​​included in the first index, the number of sending and receiving points TRP, or the number of network nodes.

36. The method according to claim 34 or 35, characterized in that The frequency domain resources of the first resources are determined according to the value of the first frequency domain density.

37. The method according to any one of claims 25 to 36, characterized in that The first offset is associated with a fifth value, the fifth value includes an identifier of a first TRP and / or a value of a first index corresponding to the first TRP, and the first offset is an RB offset of the first resource.

38. The method according to claim 37, characterized in that The offset of REs included in the frequency domain resources of the first resources within the RB is predefined.

39. The method according to any one of claims 25 to 38, characterized in that The antenna port of the first PTRS is a first antenna port, and an association relationship between the first PTRS and the first antenna port is configured at a high level or is predefined.

40. The method according to claim 39, characterized in that The first antenna port is a port with the smallest port index in a first CDM group, and the first CDM group is a CDM group to which the first antenna port belongs.

41. The method according to claim 39, characterized in that The first antenna port is the antenna port with the smallest index among the antenna ports of the first PDSCH.

42. The method according to claim 28, characterized in that The time domain density of the first resource is determined from at least one candidate time domain density, the at least one candidate time domain density is predefined, and the time domain density of the first resource is configured by a high layer.

43. The method according to claim 42, characterized in that The frequency domain density of the first resource is determined from at least one candidate frequency domain density, the at least one candidate frequency domain density is predefined, and the frequency domain density of the first resource is configured by a high layer.

44. The method according to claim 42 or 43, characterized in that The time domain density of the first resource is associated with a first index corresponding to the first PTRS, and the value of the first index is configured by a high-level layer.

45. The method according to any one of claims 42 to 44, characterized in that The first offset is determined from at least one first candidate offset, the first offset is the RB offset of the first resource, the at least one first candidate offset is predefined, and the first offset is configured by a high layer.

46. ​​The method according to claim 45, characterized in that The offset of RE included in the frequency domain resources of the first resource within the RB is determined from at least one third candidate offset, and the at least one third candidate offset is predefined. The offset of RE included in the frequency domain resources of the first resource within the RB is configured by a high level.

47. A communication method, characterized in that: include: A second PTRS is sent, where the second PTRS is transmitted through a second resource, where the second PTRS corresponds to second space parameter information, and where the second space parameter information is indicated through second indication information.

48. The method according to claim 47, characterized in that The second spatial parameter is used to transmit at least one of SRS, CSI-RS, PDSCH, PDCCH, PUSCH, PUCCH, PTRS, DMRS, TRS, or SSB.

49. The method according to claim 47 or 48, characterized in that The second spatial parameter is used to transmit a second PDSCH, and the antenna port of the second PDSCH is indicated by fourth indication information.

50. The method according to claim 49, characterized in that The fourth indication information is carried in radio resource control RRC signaling or downlink control information DCI, or media access control element MAC-CE.

51. The method according to any one of claims 47 to 50, characterized in that The first index corresponding to the second PTRS is the same as the first index indicated by the second indication information.

52. The method according to claim 51, characterized in that The method further comprises: Send sixth indication information, where the sixth indication information indicates a second value of the first index.

53. The method according to claim 52, characterized in that The sixth indication information is carried in RRC signaling, MAC-CE or DCI.

54. The method according to any one of claims 47 to 53, characterized in that The time domain density of the antenna port of the second PTRS is a second time domain density, the second resource is associated with the second time domain density, the second time domain density is indicated by PTRS configuration information, the PTRS configuration information is carried in RRC signaling, or the second time domain density is predefined.

55. The method according to claim 54, characterized in that The time domain resource of the second resource is determined according to the value of the second time domain density.

56. The method according to any one of claims 47 to 55, characterized in that The frequency domain density of the antenna port of the second PTRS is a second frequency domain density, the second resource is associated with the second frequency domain density, the second frequency domain density is predefined, or the second frequency domain density is associated with a fourth value.

57. The method according to claim 56, characterized in that The fourth value includes at least one of the number of values ​​contained in the first index, the number of sending and receiving points TRP, or the number of network nodes.

58. The method according to claim 56 or 57, characterized in that The frequency domain resources of the second resources are determined according to the value of the second frequency domain density.

59. The method according to any one of claims 47 to 58, characterized in that The second offset is associated with a sixth value, and the sixth value includes an identifier of a second TRP and / or a value of a first index corresponding to the second TRP. The second offset is an RB offset of the second resource.

60. The method according to claim 59, characterized in that The offset of REs included in the frequency domain resources of the second resources within the RB is predefined.

61. The method according to claim 60, characterized in that The antenna port of the second PTRS is a second antenna port, and the association relationship between the second PTRS and the second antenna port is configured by a high layer or is predefined.

62. The method according to claim 61, characterized in that The second antenna port is the port with the smallest port index in the second CDM group, and the second CDM group is the CDM group to which the second antenna port belongs.

63. The method according to claim 61, characterized in that The second antenna port has the smallest index among the antenna ports of the second PDSCH.

64. The method of claim 50, wherein: The time domain density of the second resource is determined from at least one candidate time domain density, the at least one candidate resource density is predefined, and the time domain density of the second resource is configured by a high layer.

65. The method according to claim 64, characterized in that The frequency domain density of the second resource is determined from at least one candidate frequency domain density, the at least one candidate frequency domain density is predefined, and the frequency domain density of the second resource is configured by a high layer.

66. The method according to claim 64 or 65, characterized in that The time domain density of the second resource is associated with a first index corresponding to the second PTRS, and the value of the first index is configured by a high-level layer.

67. The method according to any one of claims 47 to 66, characterized in that The second offset is determined from at least one second candidate offset, where the second offset is an RB offset of the second resource, the at least one second candidate offset is predefined, and the second offset is configured by a high layer.

68. The method according to claim 67, characterized in that The offset of RE included in the frequency domain resources of the second resource within the RB is determined from at least one third candidate offset, and the at least one third candidate offset is predefined. The offset of RE included in the frequency domain resources of the second resource within the RB is configured by a high level.

69. A communication device, characterized in that: Comprising means for executing the method as claimed in any one of claims 1 to 24.

70. A communication device, characterized in that: Comprising means for performing the method as claimed in any one of claims 25 to 46.

71. A communication device, characterized in that: Comprising modules for performing the method as claimed in any one of claims 47 to 68.

72. A communication system, characterized in that: Comprising a communication device as described in claims 69 to claim 71.

73. A communication device, characterized in that: include: A processor, configured to execute computer instructions stored in a memory so that the apparatus performs: a method as claimed in any one of claims 1 to 68.

74. The device according to claim 73, characterized in that The apparatus also includes the memory.

75. The device according to claim 73 or 74, characterized in that The device also includes a communication interface coupled to the processor. The communication interface is used to input and / or output information.

76. The device according to any one of claims 73 to 75, characterized in that The device is a chip.

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