Communication method and communication apparatus

Abstract

The present application provides a communication method and a communication apparatus. The method comprises: a terminal device receives first configuration information, wherein the first configuration information comprises a first system parameter of a first reference signal, the first reference signal is used for demodulating first downlink data, and the first system parameter is different from a second system parameter of the first downlink data; and receiving the first reference signal on the basis of the first configuration information. The system parameter of a reference signal can be set by a network device, so that the system parameter of the reference signal can be different from a system coefficient of the data demodulated by the reference signal, thereby avoiding mutual interference between the reference signal of one transmission stream and the reference signal of the other transmission stream under different communication standards, and improving the channel estimation performance.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on December 29, 2023, with application number 202311866106.5 and invention name “A Communication Method and Communication Device”, the entire contents of which are incorporated by reference into this application. Technical Field

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

[0003] As wireless communication technology evolves, next-generation wireless communication systems may build upon existing systems and enhance their communication capabilities. For example, as the fifth-generation (5G) mobile communication system evolves to 5G-Advanced (5G-A), the next-generation wireless communication system may utilize software updates based on 5G hardware devices, enabling rapid network deployment and establishing market leadership.

[0004] Under this network construction method, the next-generation wireless communication system may provide services based on the same hardware module as the existing wireless communication system. For example, 5G and 6G can use the same hardware module for transmission, and the frequency band supported by the same hardware module is fixed. Therefore, different wireless network systems can use the same frequency band to transmit different transmission streams.

[0005] During downlink data transmission, a demodulation reference signal (DRS) is typically inserted into the downlink data transmission time-frequency resources to enable terminals to accurately obtain the downlink data transmission channel information. When different transmission streams are transmitted over the same carrier, the system parameter sets corresponding to the two transmission streams differ. This can cause the DRSs corresponding to the two transmission streams to interfere with each other, affecting channel estimation and degrading transmission performance. Summary of the Invention

[0006] The present application provides a communication method and a communication device for improving channel estimation performance.

[0007] In a first aspect, a communication method is provided. The method may be executed by a terminal device, or by a chip or circuit configured in the terminal device, or by a logic module or software capable of implementing all or part of the terminal device's functions. This application is not limited thereto.

[0008] The method includes: receiving first configuration information, the first configuration information including a first system parameter of a first reference signal, the first reference signal being used to demodulate first downlink data, the first system parameter being different from a second system parameter of the first downlink data;

[0009] The first reference signal is received according to the first configuration information.

[0010] Generally speaking, the system parameters used for downlink transmission are the same as the system parameters corresponding to the reference signal used to demodulate the downlink transmission. However, in scenarios where data of different communication standards are transmitted on the same carrier, if the system parameters used by the two transmission streams are different, the data of the two transmission streams may interfere with each other's reference signals. In this application, the network device can configure the system parameters of the reference signal so that the system parameters of the reference signal can be different from the system coefficients of the data used for demodulation by the reference signal. This can avoid mutual interference between the reference signal of one transmission stream and the reference signal of another transmission stream under a different communication standard, thereby improving channel estimation performance.

[0011] In combination with the first aspect, in a certain implementation of the first aspect, the first system parameter or the second system parameter includes one or more of the following parameters: subcarrier spacing, resource unit width, time slot length, and symbol length.

[0012] In combination with the first aspect, in a certain implementation of the first aspect, the time domain resources of the first reference signal and the time domain resources of the second reference signal are the same, the second reference signal is used to demodulate the second downlink data, the system parameters of the second reference signal and the second downlink data are the same, and the second downlink data and the first downlink data are downlink data of different transmission streams.

[0013] In combination with the first aspect, in a certain implementation of the first aspect, the transmission stream of the first downlink data and the transmission stream of the second downlink data can be two different transmission streams of the same terminal device or two different transmission streams of two terminal devices.

[0014] In this technical solution, the time domain resource of the first reference signal is the same as the time domain resource of the second reference signal of the second downlink data, so the first downlink data will not be transmitted on this time domain resource, thereby avoiding the first downlink data from interfering with the reference signal of the transmission stream of the second downlink data. In other words, the reference signals of the two transmission streams are transmitted on the same time domain resource, and there will be no interference between the data and the reference signal.

[0015] In combination with the first aspect, in a certain implementation manner of the first aspect, the first downlink data and the second downlink data are downlink data under different standards.

[0016] With reference to the first aspect, in a certain implementation of the first aspect, the transmission stream of the first downlink data and the transmission stream of the second downlink data are transmission streams of two different standards.

[0017] In combination with the first aspect, in a certain implementation manner of the first aspect, the length of the time domain unit occupied by the first reference signal is different from the length of the time domain unit occupied by the first downlink data.

[0018] With reference to the first aspect, in a certain implementation of the first aspect, the length of the symbol occupied by the first reference signal is the same as the length of the symbol occupied by the second downlink data and the second reference signal.

[0019] In combination with the first aspect, in a certain implementation manner of the first aspect, a starting time domain unit of the first reference signal is determined according to the second system parameter and the first system parameter.

[0020] In a possible example, the starting time domain unit of the first reference signal is a starting OFDM symbol occupied by the first reference signal in a time slot.

[0021] In combination with the first aspect, in a certain implementation of the first aspect, the index x of the starting time domain unit of the first reference signal is n Satisfies the following formula (1): x n =[(m+14*n)*2^(μ2-μ1)]mod14, formula (1),

[0022] Among them, m is a parameter configured or preset by the network device, n is an integer, the μ1 value corresponds to the first system parameter, and the μ2 value corresponds to the second system parameter.

[0023] In an optional implementation, n may be equal to 0.

[0024] In combination with the first aspect, in a certain implementation of the first aspect, the index x of the starting time domain unit of the first reference signal is n It can be presented in tabular form.

[0025] In combination with the first aspect, in a certain implementation manner of the first aspect, the first reference signal occupies two symbols, and the x n The value of is one or more of {1, 8}.

[0026] In combination with the first aspect, in a certain implementation manner of the first aspect, the first reference signal occupies one symbol, and the x n The value of is one of {4, 6}.

[0027] For example, when μ2-μ1≤2, the values ​​of m include 2, 3, and x n The value of is one of {4, 6}.

[0028] In combination with the first aspect, in a certain implementation of the first aspect, when μ2-μ1=1, x n The value of also includes one of {10, 12}.

[0029] In combination with the first aspect, in a certain implementation manner of the first aspect, a width of a frequency domain unit for receiving the first reference signal is determined according to the first system parameter.

[0030] In combination with the first aspect, in a certain implementation manner of the first aspect, the frequency domain reference point of the first reference signal is determined based on third configuration information.

[0031] In combination with the first aspect, in a certain implementation of the first aspect, the third configuration information is configured for the network device. For example, the network device can configure the frequency domain reference point of the first reference signal based on the frequency domain reference point of the second reference signal, thereby ensuring that the frequency domain reference point of the first reference signal and the frequency domain reference point of the second reference signal remain aligned in the frequency domain.

[0032] The third configuration information may be the same configuration information as the first configuration information, or may be independent configuration information.

[0033] In conjunction with the first aspect, in a certain implementation manner of the first aspect, the original sequence of the first reference signal, the first parameter, and the second parameter satisfy formula (2):

[0034] in, is the number of symbols in a time slot, n SCID Parameters configured for network devices, For n SCID , port corresponding parameters and the network device configuration parameters are determined, Parameters configured by the base station and Determine, λ represents the index of the code division multiplexing group corresponding to the port of the first reference signal, wherein, is the first parameter configured, and l is the second parameter configured.

[0035] In combination with the first aspect, in a certain implementation of the first aspect, the original sequence may also be referred to as a base sequence, or a pseudo-random sequence.

[0036] For example, the above is the first parameter configured, and l is the index of the OFDM symbol in the time slot.

[0037] Exemplarily, the above l is the second parameter of the configuration, is the index of the current time slot in a frame.

[0038] Exemplarily, the network device sends a system parameter configuration to the first terminal device, and the first terminal device can calculate the system parameter configuration. The corresponding value of 1 and the corresponding value of 2. The system parameter configuration may be a system parameter corresponding to the second downlink data.

[0039] In combination with the first aspect, in a certain implementation of the first aspect, the first reference signal satisfies one or more of the following: the first reference signal is configured as type one, the number of code division multiplexing groups that do not send data is different, and the difference between the average power on each resource unit corresponding to the first reference signal and the average power on each resource unit corresponding to the first downlink data is a first value; the first reference signal is configured as type two, the number of code division multiplexing groups that do not send data is different, and the difference between the average power on each resource unit corresponding to the first reference signal and the average power on each resource unit corresponding to the first downlink data is a second value.

[0040] Among them, Type 1 and Type 2 indicate two frequency domain arrangement methods. In Type 1, DMRS is arranged with one RB interval in the frequency domain. In Type 2, DMRS occupies two RBs for every 6 RBs in the frequency domain. For details, please refer to Figure 5 below and will not be repeated here.

[0041] In combination with the first aspect, in a certain implementation of the first aspect, when the first reference signal is configured as type one, the difference is -3dB; when the first reference signal is configured as type two, the difference is -4.77dB.

[0042] In a second aspect, a communication method is provided. The method can be executed by a network device, or by a chip or circuit configured in the network device, or by a logic module or software that can implement all or part of the network device's functions. This application is not limited to this.

[0043] The method includes: sending first configuration information, the first configuration information including a first system parameter of a first reference signal, the first reference signal being used to demodulate first downlink data, the first system parameter being different from a second system parameter of the first downlink data; and sending the first reference signal.

[0044] In this technical solution, the network device can configure the system parameters of the reference signal so that the system parameters of the reference signal can be different from the system coefficients of the data used to demodulate the reference signal, thereby avoiding interference between the reference signal of one transmission stream and another transmission stream under a different communication standard, thereby improving the channel estimation performance.

[0045] In combination with the second aspect, in a certain implementation of the second aspect, the method also includes: sending second configuration information, the second configuration information includes a third system parameter of a second reference signal, the second reference signal is used to demodulate second downlink data, the time domain resources of the second reference signal and the first reference signal are the same, and the second downlink data and the first downlink data are transmitted on the same carrier.

[0046] In this technical solution, a network device can transmit system parameters for second downlink data to another terminal device via the same carrier. The system parameters for the second downlink data are identical to the system parameters for the corresponding second reference signal. Furthermore, since the second reference signal and the first reference signal share the same time domain resource, the first downlink data will not be transmitted on that time domain resource, thereby preventing the first downlink data from interfering with the reference signal of the transmission stream of the second downlink data. In other words, the reference signals of the two transmission streams are transmitted on the same time domain resource, preventing data from interfering with the reference signal.

[0047] In combination with the second aspect, in a certain implementation manner of the second aspect, the first downlink data and the second downlink data are downlink data under different standards.

[0048] With reference to the second aspect, in a certain implementation of the second aspect, the transmission stream of the first downlink data and the transmission stream of the second downlink data are transmission streams of two different standards.

[0049] With reference to the second aspect, in a certain implementation of the second aspect, third configuration information is sent, where the third configuration information is used by the terminal device to determine the frequency domain reference point of the first reference signal. For example, the network device may configure the frequency domain reference point of the first reference signal based on the frequency domain reference point of the second reference signal, thereby ensuring that the frequency domain reference point of the first reference signal and the frequency domain reference point of the second reference signal are aligned in the frequency domain.

[0050] In conjunction with the second aspect, in a certain implementation of the second aspect, a first parameter and a second parameter are sent, wherein the first parameter is used to indicate The value of , the second parameter is used to indicate the value of l; the first parameter, the second parameter and the original sequence of the first reference signal satisfy formula (2):

[0051] in, is the number of symbols in a time slot, n SCID Parameters configured for network devices, For n SCID , port corresponding parameters and the network device configuration parameters are determined, Parameters configured by the base station and Determine, λ represents the index of the code division multiplexing group corresponding to the port of the first reference signal, wherein, is the first parameter, and l is the second parameter.

[0052] In conjunction with the second aspect, in a certain implementation of the second aspect, the original sequence may also be referred to as a base sequence, or a pseudo-random sequence.

[0053] For example, the above is the first parameter configured, and l is the index of the OFDM symbol in the time slot.

[0054] Exemplarily, the above l is the second parameter of the configuration, is the index of the current time slot in a frame.

[0055] Exemplarily, the network device sends a system parameter configuration to the first terminal device, and the first terminal device can calculate the system parameter configuration. The corresponding value of 1 and the corresponding value of 2. The system parameter configuration may be a system parameter corresponding to the second downlink data.

[0056] In combination with the second aspect, in a certain implementation of the second aspect, the first reference signal satisfies one or more of the following: the first reference signal is configured as type one, the number of code division multiplexing groups that do not send data is different, and the difference between the average power on each resource unit corresponding to the first reference signal and the average power on each resource unit corresponding to the first downlink data is a first value; the first reference signal is configured as type two, the number of code division multiplexing groups that do not send data is different, and the difference between the average power on each resource unit corresponding to the first reference signal and the average power on each resource unit corresponding to the first downlink data is a second value.

[0057] Among them, Type 1 and Type 2 indicate two frequency domain arrangement methods. In Type 1, DMRS is arranged with one RB interval in the frequency domain. In Type 2, DMRS occupies two RBs for every 6 RBs in the frequency domain. For details, please refer to Figure 5 below and will not be repeated here.

[0058] In a third aspect, a communication device is provided. The device may be a terminal device, or a chip or circuit configured in the terminal device, or a logic module or software capable of implementing all or part of the functions of the terminal device. This application does not limit this.

[0059] The device includes: a transceiver unit, used to receive first configuration information, the first configuration information including a first system parameter of a first reference signal, the first reference signal is used to demodulate first downlink data, the first system parameter is different from a second system parameter of the first downlink data; and a processing unit, used to receive the first reference signal according to the first configuration information.

[0060] In combination with the third aspect, in a certain implementation manner of the third aspect, the processing unit is further used to determine the length of the time domain unit for receiving the first reference signal according to the first system parameter.

[0061] In combination with the third aspect, in a certain implementation manner of the third aspect, the processing unit is further used to determine a starting time domain unit of the first reference signal according to the second system parameter and the first system parameter.

[0062] In combination with the third aspect, in a certain implementation manner of the third aspect, the processing unit is further used to determine the width of the frequency domain unit for receiving the first reference signal according to the first system parameter.

[0063] Exemplarily, a subcarrier spacing of the first reference signal is determined.

[0064] In combination with the third aspect, in a certain implementation manner of the third aspect, the processing unit is further used to determine the frequency domain reference point of the first reference signal based on third configuration information.

[0065] The beneficial effects of the third aspect and some possible implementation methods have been described in detail in the first aspect. For specific details, please refer to the first aspect. For the sake of brevity, they will not be repeated here.

[0066] In a fourth aspect, a communication device is provided. The device may be a network device, or a chip or circuit configured in the network device, or a logic module or software capable of implementing all or part of the functions of the network device. This application is not limited to this.

[0067] The device includes: a transceiver unit, used to send first configuration information, the first configuration information including a first system parameter of a first reference signal, the first reference signal is used to demodulate first downlink data, the first system parameter is different from a second system parameter of the first downlink data; the transceiver unit is also used to send the first reference signal.

[0068] In combination with the fourth aspect, in a certain implementation of the fourth aspect, the method also includes: a transceiver unit, further used to send second configuration information, the second configuration information includes a third system parameter of a second reference signal, the second reference signal is used to demodulate second downlink data, the time domain resources of the second reference signal and the first reference signal are the same, and the second downlink data and the first downlink data are transmitted on the same carrier.

[0069] In conjunction with the fourth aspect, in a certain implementation of the fourth aspect, third configuration information is sent, where the third configuration information is used by the terminal device to determine the frequency domain reference point of the first reference signal. For example, the network device may configure the frequency domain reference point of the first reference signal based on the frequency domain reference point of the second reference signal, thereby ensuring that the frequency domain reference point of the first reference signal and the frequency domain reference point of the second reference signal are aligned in the frequency domain.

[0070] In conjunction with the fourth aspect, in a certain implementation of the fourth aspect, the transceiver unit is further configured to send a first parameter and a second parameter, wherein the first parameter is used to indicate The first parameter and the second parameter are used to indicate the value of l; the first parameter and the second parameter are used by the terminal device to determine the original sequence of the first reference signal based on formula (2),

[0071] in, is the number of symbols in a time slot, n SCID Parameters configured for network devices, For n SCID , port corresponding parameters and the network device configuration parameters are determined, Parameters configured by the base station and Determine, λ represents the index of the code division multiplexing group corresponding to the port of the first reference signal, wherein, is the first parameter, and l is the second parameter.

[0072] In the embodiment of the present application, the original sequence may also be referred to as a base sequence, or a pseudo-random sequence, which is not limited in the embodiment of the present application.

[0073] For example, the above is the first parameter configured, and l is the index of the OFDM symbol in the time slot.

[0074] Exemplarily, the above l is the second parameter of the configuration, is the index of the current time slot in a frame.

[0075] Exemplarily, the network device sends a system parameter configuration to the first terminal device, and the first terminal device can calculate the system parameter configuration. The corresponding value of 1 and the corresponding value of 2. The system parameter configuration may be a system parameter corresponding to the second downlink data.

[0076] The beneficial effects of the fourth aspect and some possible implementation methods have been described in detail in the second aspect. For specific details, please refer to the second aspect. For the sake of brevity, they will not be repeated here.

[0077] In a fifth aspect, the present application provides a communication device, including a processor, configured to execute the methods provided in the above aspects.

[0078] For the operations such as sending and acquiring / receiving involved in the processor, unless otherwise specified, or if they do not conflict with their actual functions or internal logic in the relevant descriptions, they can be understood as processor output, reception, input and other operations, and can also be understood as sending and receiving operations performed by the radio frequency circuit and antenna. This application does not limit this.

[0079] Optionally, the communication device further includes: a memory for storing programs; and a processor for executing computer programs or instructions stored in the memory to perform the method provided by any one of the above aspects or its implementation.

[0080] In a sixth aspect, the present application provides a communication system, which includes a terminal device and a network device.

[0081] In a seventh aspect, the present application provides a communication system, which includes the communication device of the third aspect and the communication device of the fourth aspect.

[0082] In an eighth aspect, the present application provides a computer-readable storage medium, which stores a computer program or instruction. When the computer program or instruction runs on a computer, the method provided by any one of the above aspects or its implementation method is executed.

[0083] In a ninth aspect, the present application provides a computer program product comprising instructions, which, when run on a computer, enables the method provided by any one of the above aspects or its implementation to be executed.

[0084] In the tenth aspect, the present application provides a chip, which includes a processor and a communication interface. The processor reads instructions stored in the memory through the communication interface and executes the method provided by any one of the above aspects or its implementation method.

[0085] Optionally, as an implementation method, the chip also includes a memory, in which a computer program or instruction is stored, and the processor is used to execute the computer program or instruction stored in the memory. When the computer program or instruction is executed, the processor is used to execute the method provided by any of the above aspects or its implementation methods.

[0086] The chip may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] FIG1 is a schematic diagram of a communication system 100 applicable to an embodiment of the present application.

[0088] FIG2 is a schematic diagram of a space division multiplexing scenario applicable to an embodiment of the present application.

[0089] FIG3 is a 5G and 6G co-carrier scenario applicable to an embodiment of the present application.

[0090] FIG4 is a schematic diagram of a time domain resource configuration method applicable to an embodiment of the present application.

[0091] FIG5 is a schematic diagram of a time domain resource configuration method applicable to an embodiment of the present application.

[0092] FIG6 is a schematic diagram of a communication method applicable to an embodiment of the present application.

[0093] FIG7 is a schematic diagram of resource configuration for transmitting two types of downlink data on a common carrier applicable to an embodiment of the present application.

[0094] FIG8 is a schematic diagram of a time domain configuration of first downlink data and second downlink data applicable to an embodiment of the present application.

[0095] FIG9 is a schematic diagram of a time domain configuration of first downlink data and second downlink data applicable to an embodiment of the present application.

[0096] FIG10 is a schematic diagram of a frequency domain reference point pattern applicable to an embodiment of the present application.

[0097] FIG11 is a structural block diagram of a communication device applicable to an embodiment of the present application.

[0098] FIG12 is a structural block diagram of a communication device applicable to an embodiment of the present application. DETAILED DESCRIPTION

[0099] The technical solution in this application will be described below with reference to the accompanying drawings.

[0100] The technical solutions provided in this application can be applied to various communication systems, such as: fifth generation (5G) or new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system. The technical solutions provided in this application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and Internet of Things (IoT) communication systems or other communication systems.

[0101] The terminal devices in the embodiments of the present application include various devices with wireless communication functions, which can be used to connect people, objects, machines, etc. The terminal devices can be widely used in various scenarios, such as: cellular communication, D2D, V2X, peer to peer (P2P), M2M, MTC, IoT, virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city drones, robots, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery, etc. The terminal device can be a terminal in any of the above scenarios, such as an MTC terminal, an IoT terminal, etc. The terminal device may be a user equipment (UE) of the third generation partnership project (3GPP) standard, a terminal, a fixed device, a mobile station device or a mobile device, a subscriber unit, a handheld device, a vehicle-mounted device, a wearable device, a cellular phone, a smart phone, a SIP phone, a wireless data card, a personal digital assistant (PDA), a computer, a tablet computer, a notebook computer, a wireless modem, a handheld device, a laptop computer, a computer with wireless transceiver function, a smart book, a vehicle, a satellite, a global positioning system (GPS) device, a target tracking device, an aircraft (such as a drone, a helicopter, a multi-copter, a quadcopter, or an airplane), a ship, a remote control device, a smart home device, an industrial device, or a device built into the above-mentioned device (such as a communication module, a modem or a chip in the above-mentioned device), or other processing devices connected to a wireless modem. For ease of description, the terminal device will be described below by taking the terminal or UE as an example.

[0102] It should be understood that in some scenarios, a UE can also be used to act as a base station. For example, a UE can act as a scheduling entity that provides sidelink signals between UEs in scenarios such as V2X, D2D, or P2P.

[0103] In the embodiments of the present application, the device for implementing the function of the terminal device can be the terminal device, or it can be a device that can support the terminal device to implement the function, such as a chip system or chip, which can be installed in the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0104] The network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be referred to as an access network device or a wireless access network device, such as a network device may be a base station. The network device in the embodiment of the present application may refer to a radio access network (RAN) node (or device) that accesses a terminal device to a wireless network. A base station may broadly cover various names as follows, or be replaced with the following names, such as: Node B (NodeB), evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmitting point (TP), master station, auxiliary station, multi-standard wireless (motor slide retainer, MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, positioning node, etc. A base station may be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. A base station may also refer to a communication module, a modem or a chip for being arranged in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in D2D, V2X, and M2M communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the network equipment.

[0105] In some scenarios, the network device may also be a module or unit that can implement some or all of the functions of a base station. For example, the network device may be a centralized unit (CU), a distributed unit (DU), a CU and DU, a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU may be configured separately or included in the same network element, such as a baseband unit (BBU). The RU may be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0106] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, the network device may be a network device or a module of a network device in an open radio access network (open RAN, ORAN) system. In the ORAN system, CU may also be referred to as open (open, O)-CU, DU may also be referred to as O-DU, CU-CP may also be referred to as O-CU-CP, CU-UP may also be referred to as O-CU-UP, and RU may also be referred to as O-RU. Any of the CU (or CU-CP, CU-UP), DU and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0107] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0108] In the embodiments of the present application, the device for implementing the function of the network device can be a terminal device, or a device that can support the network device to implement the function, such as a chip system or chip, which can be installed in the network device. In the embodiments of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0109] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0110] First, a brief introduction to the network architecture applicable to the embodiments of the present application is given as follows.

[0111] Referring to Figure 1, as an example, Figure 1 is a schematic diagram of a communication system 100 applicable to an embodiment of the present application. As shown in Figure 1, the wireless communication system 100 may include at least one network device, such as the network device 110 shown in Figure 1. The wireless communication system 100 may also include at least one terminal device, such as the terminal device 120 and the terminal device 130 shown in Figure 1. Both the network device and the terminal device may be configured with multiple antennas, and the network device and the terminal device may communicate using multi-antenna technology. Terminal devices may also communicate with each other. For example, terminal devices may communicate directly with each other. For another example, terminal devices may communicate with each other through other communication devices, such as network devices or other terminal devices.

[0112] When a network device communicates with a terminal device, the network device can manage one or more cells, and a cell can have an integer number of terminal devices. Optionally, network device 110 and terminal device 120 form a single-cell communication system. Without loss of generality, this cell is referred to as cell #1. Network device 110 can be a network device in cell #1, or network device 110 can serve a terminal device (e.g., terminal device 120) in cell #1.

[0113] It should be noted that a cell can be understood as an area within the coverage range of wireless signals of network equipment.

[0114] It should be understood that Figure 1 is a simplified schematic diagram for ease of understanding, and the wireless communication system 100 may also include other network devices or other terminal devices, which are not shown in Figure 1. The embodiments of the present application can be applied to any communication scenario in which a transmitting device and a receiving device communicate.

[0115] Fifth-generation mobile communication systems feature Massive MIMO. When downlink transmission requires different information, such as different information for different users or multiple streams of information for the same user, precoding can be used to enable different beam directions for different transmissions, thus achieving spatial division multiplexing (SDM). SDM allows different transmissions to use the same time-frequency resources, improving transmission throughput and resource utilization efficiency.

[0116] As an example, Figure 2 shows a schematic diagram of a spatial division multiplexing scenario. In this scenario, a network device can use the same time-frequency resources to transmit different transport streams to different users through precoding. As shown in Figure 2, network device 210 can send downlink transport stream #1 to user #1 and downlink transport stream #2 to user #2. Transport stream #1 and transport stream #2 occupy the same time-frequency resources.

[0117] As wireless networks evolve from one generation to the next, next-generation wireless communication systems may be built on existing wireless communication systems and enhance communication capabilities. For example, as the fifth-generation mobile communication system (5G) evolves to 5G-Advanced (5G-A), the next-generation wireless communication system may implement software updates based on 5G hardware devices, enabling rapid network deployment and establishing market leadership. The following example illustrates the scenario of 5G and 6G co-carriers.

[0118] See FIG3 , which is a schematic diagram of a scenario applicable to an embodiment of the present application as an example.

[0119] Figure 3 illustrates a 5G and 6G co-carrier scenario. In this scenario, 5G and 6G networks can provide services based on existing (5G) hardware modules. This means that 5G and 6G networks use the same hardware modules for transmission, and since the hardware modules support fixed frequency bands, both 5G and 6G networks use the same frequency bands for transmission. In other words, 5G and 6G networks transmit their respective traffic streams over the same frequency bands.

[0120] To facilitate understanding of the embodiments of the present application, the following first briefly introduces the terms and background involved in the present application.

[0121] 1. Antenna port

[0122] Antenna ports are referred to as ports. They can be understood as transmit antennas identified by the receiver, or transmit antennas that can be distinguished spatially. An antenna port can be configured for each virtual antenna, and each virtual antenna can be a weighted combination of multiple physical antennas. Depending on the signals they carry, antenna ports can be divided into reference signal ports and data ports. Reference signal ports can include, but are not limited to, DMRS ports and channel state information reference signal (CSI-RS) ports.

[0123] 2. Time-frequency resources

[0124] In an embodiment of the present application, data or information may be carried by time-frequency resources. The time-frequency resources may include at least one of 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.

[0125] Among them, a time domain unit can be a symbol or several 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, a mini-slot can include 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 solution of the present application and do not limit the scope of protection of the present application. It is understandable that the above-mentioned time domain unit sizes can be other values, and this application does not limit them. In the present application, the length of the time domain unit may include the length of the time slot and / or the length of the symbol. The symbol in the present application may be an orthogonal frequency division multiplexing (OFDM) symbol. In the following embodiments, OFDM symbols are used as an example for illustration.

[0126] 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.

[0127] 3. Demodulation reference signal (DMRS)

[0128] When transmitting a downlink transmission stream, in order to enable the terminal to correctly obtain the channel information of the downlink data transmission and thus correctly demodulate the transmission data, a reference signal, such as a demodulation reference signal (DM-RS), can be inserted into the time-frequency resources of the data transmission.

[0129] In new radio (NR) systems, DMRS is used for equivalent channel matrix estimation of data channels, such as the physical uplink shared channel (PUSCH) or control channels, such as the physical downlink control channel (PDCCH), so as to detect and demodulate data on the corresponding channels.

[0130] Taking the physical downlink shared channel (PDSCH) as an example, the DMRS is usually precoded in the same way as the transmitted data signal, ensuring that the 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. The 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 (3) and formula (4), respectively:

[0131] 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 uses channel estimation algorithms such as least squares (LS) channel estimation and minimum mean square error (MMSE) channel estimation to obtain the equivalent channel. The data signal can be demodulated based on the equivalent channel.

[0132] 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 R represents the number of receive antennas, and R represents the number of transmission streams (also known as the number of transmission layers or spatial layers). Typically, one DMRS port corresponds to one transmission stream. That is, for MIMO transmission with R transmission streams, R DMRS ports are required. To ensure the quality of channel estimation, the DMRS ports corresponding to multiple transmission streams are orthogonal.

[0133] For a DMRS port, multiple DMRSs need to be sent on multiple time-frequency resources to perform channel estimation for different time-frequency resources. The multiple DMRSs corresponding to a port correspond to a DMRS sequence. A DMRS sequence includes multiple DMRS sequence elements.

[0134] 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:

[0135] Among them, c(n) is a pseudo-random sequence, 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 (6):

[0136] 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 (7):

[0137] Wherein, l represents the index value of the OFDM symbol on a time slot; is the number of symbols contained in a time slot; is the 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-layer signaling, which is related to the cell (identifier, ID) and can usually be equal to the cell ID; λ represents the code division multiplexing (CDM) group index corresponding to the DMRS port.

[0138] The configuration of DMRS time-frequency resources is described in detail below.

[0139] From the perspective of the number of occupied symbols, DM-RS configuration can be divided into single-symbol DM-RS and dual-symbol DM-RS; from the perspective of mapping method, DM-RS configuration can be divided into Type A mapping and Type B mapping; from the perspective of time domain configuration position, DM-RS configuration can be divided into pre-DM-RS and additional DM-RS; from the perspective of frequency domain configuration method, DM-RS configuration can be divided into Type 1 configuration and Type 2 configuration.

[0140] 1) For the time domain starting symbol position configuration of PDSCH DM-RS:

[0141] a) For Type A mapping:

[0142] i. The starting position of the pre-DM-RS is the OFDM symbol with index 2 / 3 (actually the 3 / 4th OFDM symbol in the time slot);

[0143] ii. In the single-symbol DM-RS scenario, the index of the starting position of the additional DM-RS can be configured as the following combination values: 7, 9, 11, 12, 6&9, 7&11, 5&8&11;

[0144] iii. In the dual-symbol DM-RS scenario, the index of the starting position of the additional DM-RS can be configured as the following combination of values: 8, 10;

[0145] b) For Type B mapping:

[0146] i. The starting position of the pre-DM-RS is the first OFDM symbol scheduled by PDSCH (which can be flexibly configured according to the scheduling);

[0147] ii. In the single-symbol DM-RS scenario, the index of the starting position of the additional DM-RS can be configured as the following combination values: 4, 6, 7, 8, 9, 3&6, 4&7, 4&8, 5&9, 3&6&9;

[0148] iii. In the dual-symbol DM-RS scenario, the index of the starting position of the additional DM-RS can be configured as the following combination values: 5, 7, 8.

[0149] See Figure 4, which is a schematic diagram of a time domain resource configuration method applicable to an embodiment of the present application. As shown in Figure 4, the subcarrier spacing is 15 kHz. In a time slot, the starting position of a single-symbol DMRS is OFDM symbol index 2; the starting position of a dual-symbol DMRS is OFDM symbol index 3; and the starting position of a single-symbol DMRS additional pilot is OFDM symbol index 9.

[0150] 2) Configuration of frequency domain resources for PDSCH DM-RS:

[0151] a) For Type 1 configuration, for the DM-RS corresponding to a port, its frequency domain resources are 6 subcarriers in each RB (containing 12 consecutive subcarriers), where every 2 subcarriers are separated by 1 subcarrier;

[0152] b) For Type 2 configuration, for the DM-RS corresponding to a port, its frequency domain resources are 2 consecutive subcarriers among the 6 consecutive subcarriers in each RB (containing 12 consecutive subcarriers), where each 2 groups of subcarriers are separated by 6 subcarriers.

[0153] See Figure 5, which is a schematic diagram of a frequency domain resource configuration method applicable to an embodiment of the present application. As shown in Figure 5, taking one RB as an example, on 12 consecutive subcarriers, Type 1 DMRS occupies 6 subcarriers, and every two subcarriers are separated by 1 subcarrier spacing; Type 2 DMRS occupies 2 subcarriers on every 6 subcarriers, and every 2 groups of subcarriers are separated by 6 subcarriers.

[0154] 4. Average power per RE (energy per UE, EPRE) offset

[0155] In existing protocols, the difference between DM-RS EPRE and PDSCH EPRE is determined by the number of CDM groups used (indexed by port). Table 1 below shows the relationship between DM-RS EPRE and PDSCH EPRE.

[0156] Table 1

[0157] Based on the above configuration, it can be seen that the number of transmission streams corresponding to different port indices is orthogonal. In other words, for a certain DM-RS frequency domain configuration (such as Type 1), different indices can be configured for different transmission streams to distinguish DM-RS, thereby achieving good channel estimation and transmission performance.

[0158] 5. System parameter set

[0159] System parameter set (numerology) refers to a set of parameters used by a transport stream during transmission. The system parameter set may include subcarrier spacing, time slot length, symbol length, etc.

[0160] In the embodiment of the present application, the system parameter set may also be referred to as system parameters, and the system parameters are taken as an example in the specific embodiment.

[0161] Generally speaking, a system parameter set (numerology) may be indicated by a parameter μ. Specifically, the parameters used by the transmission system may be determined based on the value of the parameter μ, as shown in Table 2 below (1 frame = 10 ms, 1 subframe = 1 ms).

[0162] Table 2

[0163] As can be seen from the table above, different system parameter sets correspond to different subcarrier spacing, time slots and OFDM symbol lengths. At the same time, for general configuration methods, the subcarrier spacing between different system parameter sets is 2 m times, the corresponding time slot / OFDM symbol length is 2 -m At the same time, no matter which system parameter set is used, the number of OFDM symbols contained in a time slot is always 14.

[0164] Generally speaking, regardless of the system parameter set used by the transmission stream (i.e., subcarrier spacing, absolute time slot length, etc., also known as numerology), the PDSCH DM-RS configuration is determined relative to the configuration of the current transmission stream (such as the starting symbol, frequency domain distribution, sequence mapping method, etc.). In other words, the system parameter set used by the PDSCH DM-RS is the same as the system parameter set used by the transmission stream. In other words, generally for a fixed carrier and a single radio access technology (RAT) service scenario (such as 5G network service only), the system parameter set in a time slot is the same, and the DM-RS resources are mutually orthogonal to ensure channel estimation performance.

[0165] 6. Common carrier transmission

[0166] Transmitting two transmission streams using the same frequency band is called co-carrier transmission. In other words, two transmission streams are transmitted using the same hardware module, and the frequency band supported by the hardware module is fixed.

[0167] When two transmission streams are transmitted on the same carrier, for example, a 5G transmission stream and a 6G transmission stream are transmitted on the same carrier, since the transmission requirements corresponding to each transmission stream may be different (such as low latency or coverage) and the system parameter sets used are also different, the data of the two transmission streams and each other's demodulation reference signals may interfere with each other, affecting the channel estimation performance and degrading the transmission performance.

[0168] In view of this, an embodiment of the present application provides a communication method, so that when two transmission streams of different standards are transmitted on the same carrier, even if different system parameter sets are used for data transmission, the DM-RS resources corresponding to the two transmission streams can still remain orthogonal, thereby ensuring channel estimation performance.

[0169] The communication method provided by the embodiment of the present application will be described in detail below with reference to the accompanying drawings. The embodiment provided by the present application can be applied to the communication system shown in FIG1 above without limitation.

[0170] The solution of this application is described in detail below.

[0171] Figure 6 is a schematic flow chart of a communication method 600 provided in an embodiment of the present application. For ease of description, method 600 is described below using a terminal device as an example. It is understood that the terminal device may be a component of the terminal device (e.g., a chip or circuit), without limitation.

[0172] S610, the first terminal device receives first configuration information.

[0173] The network device sends first configuration information to the first terminal device, and correspondingly, the first terminal device receives the first configuration information.

[0174] The first configuration information includes a first system parameter of a first reference signal.

[0175] The first reference signal is used to demodulate the first downlink data.

[0176] Exemplarily, the first downlink data may be a 6G transmission stream.

[0177] Exemplarily, the first reference signal may be a DMRS.

[0178] The first system parameter is different from the second system parameter of the first downlink data.

[0179] The first system parameter or the second system parameter may include one or more of the following parameters: subcarrier spacing, resource unit width, time slot length, and symbol length.

[0180] It can be understood that the first system parameters are different from the second system parameters. For example, the subcarrier spacing of the first reference signal is different from the subcarrier spacing of the first downlink data. Then, the length of the time slot of the first reference signal is different from the time slot length of the first downlink data, and the symbol length of the first reference signal is different from the symbol length of the first downlink data.

[0181] In the embodiment of the present application, the second system parameter can be sent to the first terminal device through the first configuration information, or can be sent to the first terminal device through other configuration information, and the embodiment of the present application is not limited to this.

[0182] In one possible implementation, the network device sends second configuration information to the second terminal device, where the second configuration information includes a third system parameter of a second reference signal, where the second reference signal is used to demodulate the second downlink data.

[0183] In one possible implementation, the network device sends second configuration information to the first terminal device, where the second configuration information includes a third system parameter of a second reference signal, and the second meal card signal is used to demodulate the second downlink data.

[0184] It can be understood that the transmission stream of the first downlink data and the transmission stream of the second downlink data may be two different transmission streams of the same terminal device, or may be two different transmission streams of two field devices.

[0185] Exemplarily, the second reference signal may be a DMRS. The system parameters of the second downlink data and the second reference signal are the same, that is, the third system parameter.

[0186] Exemplarily, the third system parameter may include one or more of the following parameters: subcarrier spacing, resource unit width, time slot length, and symbol length.

[0187] The second downlink data and the first downlink data use the same time domain resource, and the transmission stream of the second downlink data and the transmission stream of the first downlink data are transmitted using the same carrier.

[0188] The time domain resource of the first reference signal and the time domain resource of the second reference signal are the same.

[0189] The first downlink data and the second downlink data are downlink data under different standards.

[0190] Exemplarily, the second downlink data is a 5G transmission stream.

[0191] An optional understanding is that the first downlink data and the second downlink data are transmission streams sent by the network device to the first terminal device and the second terminal device respectively, wherein the second system parameter of the first downlink data is different from the first system parameter of the first reference signal used to demodulate the first downlink data, the system parameter of the second downlink data is the same as the system parameter of the second reference signal used to demodulate the second downlink data (third system parameter), and the time domain resources of the first reference signal and the time domain resources of the second reference signal are the same, and the two transmission streams of different standards (first downlink data and second downlink data) can be transmitted on the same carrier.

[0192] It should be noted that the second downlink data and the first downlink data are downlink data of two different transmission streams. The two transmission streams can be transmission streams of different terminal devices, for example, the transmission stream of the first terminal device and the transmission stream of the second terminal device; or they can be transmission streams of the same terminal device, for example, two transmission streams of the first terminal device. This embodiment of the present application is not limited to this.

[0193] Referring to Figure 7, as an example, Figure 7 shows a resource configuration diagram for a common carrier transmission of two downlink data applicable to an embodiment of the present application. As shown in Figure 7, the network device sends the first downlink data to the first terminal device, and the network device sends the second downlink data to the second terminal device, and the first downlink data and the second downlink data occupy the same time-frequency resources. Among them, the subcarrier spacing of the second downlink data is the same as the subcarrier spacing of the second reference signal (the system parameters are the same, both are third system parameters), for example, both are 15KHZ, wherein the subcarrier spacing of the first downlink data and the subcarrier spacing of the first reference signal are different (the first system parameters and the second system parameters are different), for example, the subcarrier spacing of the first downlink data is 30KHZ, and the subcarrier spacing of the first reference signal is 15KHZ. When the first downlink data and the second downlink data are transmitted on the same carrier, the time domain resources of the first reference signal and the second reference signal are the same. During the transmission process of the first reference signal and the second reference signal, the first reference signal and the second reference signal are transmitted on the same time domain resource, that is, no data will be transmitted on the time domain resource, thereby avoiding the interference of the data of one transmission stream with the reference signal of another transmission stream, thereby improving the channel estimation performance.

[0194] S620: The first terminal device receives a first reference signal according to the first configuration information.

[0195] The first configuration information includes the first system parameters of the first reference signal. The first terminal device can determine the time domain unit and frequency domain unit for receiving the first reference signal based on the first system parameters, and receive the first reference signal sent by the network device according to the time domain unit and frequency domain unit.

[0196] Exemplarily, the network device sends first downlink data to the first terminal device. The terminal device can determine the time domain unit and frequency domain unit for receiving the first downlink data based on the second system parameter, and receive the first downlink data based on the time domain unit and frequency domain unit.

[0197] The following describes how the first terminal device determines the time domain unit and frequency domain unit for receiving the first reference signal based on the first system parameter.

[0198] In one possible implementation, the first terminal device determines the length of the time domain unit for receiving the first reference signal according to the first system parameter.

[0199] In an embodiment of the present application, the length of the OFDM symbol and the length of the time slot occupied by the first reference signal are determined by the first system parameter. In one possible understanding, the first system parameter and the second system parameter are different, the length of the OFDM symbol occupied by the first reference signal is different from the length of the OFDM symbol occupied by the first downlink data, but the length of the OFDM symbol occupied by the first reference signal is the same as the length of the OFDM symbol occupied by the second downlink data and the second reference signal. For example, as shown in FIG7 , the time domain resources occupied by the first reference signal are the same as the time domain resources occupied by the second reference signal, and the length of the OFDM symbol occupied by the first reference signal is the same as the length of the OFDM symbol occupied by the second reference signal.

[0200] In one possible implementation, the first terminal device determines a starting time domain unit of the first reference signal according to the first system parameter and the second system parameter.

[0201] It can be understood that the first system parameter is the system parameter of the first reference signal, the second system parameter is the system parameter of the first downlink data, and the starting time domain unit of the first reference signal can determine the length of the OFDM symbol of the first downlink data through the second system parameter, and then determine the starting time domain unit of the first reference signal based on the length of the OFDM symbol of the first downlink data and the length of the OFDM symbol occupied by the first reference signal.

[0202] In a possible example, the starting time domain unit of the first reference signal is an occupied starting OFDM symbol in a time slot.

[0203] Exemplarily, the index x of the starting time domain unit of the first reference signal n Satisfies the following formula (1): x n =[(m+14*n)*2^(μ2-μ1)]mod14, formula (1),

[0204] Among them, m is a parameter configured or preset by the network device, n is an integer, the μ1 value corresponds to the first system parameter, and the μ2 value corresponds to the second system parameter.

[0205] It should be noted that the μ1 value and the μ2 value can be the values ​​in Table 4. For example, the μ1 value can be equal to 0, and the subcarrier spacing in the first system parameter is 15 kHz, and the μ2 value can be equal to 1, and the subcarrier spacing in the second system parameter is 30 kHz.

[0206] In an optional implementation, n may be equal to 0.

[0207] Exemplarily, the index x of the starting time domain unit of the first reference signal n It can be presented in table form, and the embodiments of the present application are not limited to this.

[0208] In a possible implementation, the first reference signal occupies a double symbol, that is, the first reference signal is configured as a double symbol, x n The value of is one or more of {1, 8}.

[0209] For example, when μ1-μ2=1, the value of m includes 2, x n The value of can be one or more of {1, 8}.

[0210] For example, when x n When the value of includes 1, x n The value of can also include one of {4, 5}; when x n The value of x includes 8, n The value of also includes one of {11, 12}.

[0211] In a possible implementation, considering the additional pilot position of the first reference signal occupying double symbols, the value of m also includes one or more of {8, 10}.

[0212] The following is a specific example to illustrate x n The value method of .

[0213] FIG8 shows a case where μ1 corresponding to the first reference signal system parameter is greater than μ2 corresponding to the first downlink data system parameter.

[0214] Referring to Figure 8, as an example, Figure 8 shows a schematic diagram of the time domain configuration of the first downlink data and the second downlink data. Among them, the first downlink data takes the first PDSCH as an example, the subcarrier spacing (SCS) used by the first PDSCH is 15KHZ, the SCS used by the first DMRS is 30KHZ, and the first DMRS is used to demodulate the first PDSCH; the second downlink data takes the second PDSCH as an example, the SCS used by the second PDSCH and the second DMRS are both 50KHZ, and the second DMRS is used to demodulate the second PDSCH. As shown in Figure 8 (a), the value of m is 2 as an example, then in order to ensure that the time domain resources of the first DMRS and the second DMRS are the same, the index of the time domain unit occupied by the first DMRS can be 1. In other words, the index of the time domain unit occupied by the first DMRS is 1, and the position of the time domain unit occupied by the first DMRS is the same as the position of the time domain unit occupied by the second DMRS.

[0215] Exemplarily, considering the additional pilot positions occupied by the first DMRS and the second DMRS, as shown in (b) of Figure 8, the values ​​of m are 2 and 8 as examples. Then, in order to ensure that the time domain resources of the first DMRS and the second DMRS are the same, the index of the time domain unit occupied by the first DMRS can be 1 and 4. In other words, the index of the time domain unit occupied by the first DMRS is 1 and 4, and the position of the time domain unit occupied by the first DMRS is the same as the position of the time domain unit occupied by the second DMRS.

[0216] Exemplarily, considering the additional pilot positions occupied by the first DMRS and the second DMRS, as shown in (c) of Figure 8, the values ​​of m are 2 and 10 as examples. Then, in order to ensure that the time domain resources of the first DMRS and the second DMRS are the same, the index of the time domain unit occupied by the first DMRS can be 1 and 5. In other words, the index of the time domain unit occupied by the first DMRS is 1 and 5, and the position of the time domain unit occupied by the first DMRS is the same as the position of the time domain unit occupied by the second DMRS.

[0217] For example, consider a scenario in which a time slot corresponding to a 15KHZ subcarrier corresponds to a time slot corresponding to two 30KHZ subcarriers. In this scenario, both the time slot corresponding to a 15KHZ subcarrier and the time slot corresponding to the two 30KHZ subcarriers have data transmission, as shown in (d) of Figure 8 . For the second PDSCH, the value of m is 2 and 2 as an example, that is, the second DMRS occupies the time domain unit with an index of 2 in the two time slots, respectively. Then, in order to ensure that the time domain resources of the first DMRS and the second DMRS are the same, on the first PDSCH, the index of the time domain unit occupied by the first DMRS in the one time slot can be 1 and 8, corresponding to the time domain unit with an index of 2 in the first time slot and the time domain unit with an index of 2 in the second time slot in the second PDSCH, respectively. In other words, the indexes of the time domain units occupied by the first DMRS are 1 and 8, and the position of the time domain unit occupied by the first DMRS is the same as the position of the time domain unit occupied by the second DMRS.

[0218] For example, consider a scenario where a time slot corresponding to a 15KHZ subcarrier and a time slot corresponding to two 30KHZ subcarriers correspond to data. In this scenario, a time slot corresponding to a 15KHZ subcarrier and a time slot corresponding to two 30KHZ subcarriers both have data transmission. As shown in (e) of FIG8 , for the second PDSCH, the value of m is 2, 2, and 10 as an example, that is, the second DMRS occupies the time domain unit with an index of 3 in the two time slots, and in the second time slot, there is an additional DMRS on the time domain unit with an index of 10. Then, in order to ensure that the first DMRS and The time domain resources of the second DMRS are the same. On the first PDSCH, the indexes of the time domain units occupied by the first DMRS in this time slot can be 1, 8, and 12, which correspond to the time domain unit with an index of 2 in the first time slot in the second PDSCH, the time domain unit with an index of 2 in the second time slot, and the time domain unit with an index of 10 occupied by the additional DMRS in the second time slot. In other words, the indexes of the time domain units occupied by the first DMRS are 1, 8, and 12, and the positions of the time domain units occupied by the first DMRS are the same as the positions of the time domain units occupied by the second DMRS.

[0219] Through the above example, when the first PDSCH and the first DMRS use different system parameters, and μ1 corresponding to the first DMRS system parameter is greater than μ2 corresponding to the first downlink data system parameter, the index of the starting time domain unit occupied by the first DMRS is determined in the above manner, and the time domain resources of the first DMRS and the second DMRS are the same. This ensures that when the first PDSCH and the second PDSCH are transmitted on the same carrier, interference between the DMRS of one transmission stream and another transmission stream under a different communication standard is avoided.

[0220] In a possible implementation, the first reference signal occupies two symbols, that is, the first reference signal is configured as a single symbol, x n The value of is one of {4, 6}.

[0221] For example, when μ2-μ1≤2, the values ​​of m include 2, 3, and x n The value of is one of {4, 6}.

[0222] In a possible implementation, the first reference signal is configured as a single symbol, and the value of m further includes one of {5, 6}.

[0223] In one possible implementation, when μ2-μ1=1, x n The value of also includes one of {10, 12}.

[0224] The following is a specific example to illustrate x n The value method of .

[0225] FIG9 shows a case where μ1 corresponding to the first reference signal system parameter is smaller than μ2 corresponding to the first downlink data system parameter.

[0226] Referring to Figure 9, as an example, Figure 9 shows a schematic diagram of the time domain configuration of the first downlink data and the second downlink data. Among them, the first downlink data takes the first PDSCH as an example, the SCS used by the first PDSCH is 30KHZ, the SCS used by the first DMRS is 15KHZ, and the first DMRS is used to demodulate the first PDSCH; the second downlink data takes the second PDSCH as an example, the SCS used by the second PDSCH and the second DMRS are both 15KHZ, and the second DMRS is used to demodulate the second PDSCH. As shown in Figure 9 (a), the value of m is 3 as an example, then in order to ensure that the time domain resources of the first DMRS and the second DMRS are the same, the index of the time domain unit occupied by the first DMRS can be 6. In other words, the index of the time domain unit occupied by the first DMRS is 6, and the position of the time domain unit occupied by the first DMRS is the same as the position of the time domain unit occupied by the second DMRS.

[0227] For example, as shown in (b) of Figure 9, the value of m is 2. Then, in order to ensure that the time domain resources of the first DMRS and the second DMRS are the same, the index of the time domain unit occupied by the first DMRS can be 4. In other words, the index of the time domain unit occupied by the first DMRS is 4, and the position of the time domain unit occupied by the first DMRS is the same as the position of the time domain unit occupied by the second DMRS.

[0228] For example, consider the scenario where a time slot corresponding to a 15KHZ subcarrier corresponds to a time slot corresponding to two 30KHZ subcarriers. In this scenario, both the time slot corresponding to a 15KHZ subcarrier and the time slot corresponding to two 30KHZ subcarriers have data transmission, as shown in (c) of Figure 9. For the second PDSCH, the value of m is 3, 6, and 9 as an example, that is, the second DMRS occupies time domain units with indexes of 3, 6, and 9 in a time slot. Then, in order to ensure that the time domain resources of the first DMRS and the second DMRS are the same, on the first PDSCH, the indexes of the time domain units occupied by the first DMRS in the first time slot can be 6 and 12, corresponding to the time domain units with index 3 and index 6 in the second PDSCH, respectively. In other words, the indices of the time domain units occupied by the first DMRS are 6 and 12, and the position of the time domain units occupied by the first DMRS is the same as the position of the time domain units occupied by the second DMRS.

[0229] For example, consider a scenario where a 15KHZ time slot corresponds to two 30KHZ time slots. In this scenario, both the 15KHZ time slot and the two 30KHZ time slots have data transmission, as shown in (d) of Figure 9. For the second PDSCH, the value of m is 2, 5, 8 and 11 as examples, that is, the second DMRS occupies time domain units with indexes of 2, 5, 8, and 11 in a time slot. Then, in order to ensure that the time domain resources of the first DMRS and the second DMRS are the same, on the first PDSCH, the indices of the time domain units occupied by the first DMRS in the first time slot can be 4 and 10, corresponding to the time domain units with indexes of 2 and 5 in the second PDSCH, respectively. In other words, the indices of the time domain units occupied by the first DMRS are 4 and 10, and the position of the time domain units occupied by the first DMRS is the same as the position of the time domain units occupied by the second DMRS.

[0230] Through the above example, when the first PDSCH and the first DMRS use different system parameters, and μ1 corresponding to the first DMRS system parameter is less than μ2 corresponding to the first downlink data system parameter, the index of the starting time domain unit occupied by the first DMRS is determined in the above manner, and the time domain resources of the first DMRS and the second DMRS are the same. This ensures that when the first PDSCH and the second PDSCH are transmitted on the same carrier, interference between the DMRS of one transmission stream and another transmission stream under a different communication standard is avoided.

[0231] In one possible implementation, the first terminal device determines the width of the frequency domain unit for receiving the first reference signal according to the first system parameter.

[0232] Exemplarily, a subcarrier spacing of the first reference signal is determined.

[0233] In the embodiment of the present application, the subcarrier spacing of the frequency domain resources occupied by the first reference signal is determined by the first system parameter.

[0234] One possible understanding is that the first system parameters and the second system parameters are different, the subcarrier spacing occupied by the first reference signal and the subcarrier spacing occupied by the first downlink data are different, but the subcarrier spacing occupied by the first reference signal is the same as the subcarrier spacing occupied by the second downlink data and the second reference signal.

[0235] Exemplarily, as shown in FIG7 , the subcarrier spacing occupied by the first reference signal is the same as the subcarrier spacing occupied by the second reference signal, and the subcarrier spacing occupied by the first reference signal is the same as the subcarrier spacing occupied by the second reference signal.

[0236] In one possible implementation, the first terminal device may determine a frequency domain reference point of the first reference signal.

[0237] Among them, the frequency domain reference point is the starting reference point (anchor point) of the frequency domain arrangement. Generally speaking, this point can be set to the starting RB corresponding to the common resource block (CRB) 0 or CORESET0. The starting RB is configured by the network device, for example, through the system information block 1 SIB1 (System Information Block 1, SIB1) or the synchronization signal and PBCH block (synchronization signal and PBCH block, SSB) configuration.

[0238] In the embodiments of the present application, the frequency domain reference point may be configured. For example, the frequency domain reference point may be configured using third configuration information. Alternatively, the frequency domain reference point may be configured using other configuration information, for example, the frequency domain reference point may be configured using first configuration information. In other words, the third configuration information and the first configuration information may be the same configuration information or different configuration information, and this is not limited in the embodiments of the present application.

[0239] Exemplarily, the first terminal device determines, based on the third configuration information, that the frequency domain reference point is the frequency domain reference point of the second reference signal in the second downlink data.

[0240] As an example, Figure 10 shows a schematic diagram of a frequency domain reference point pattern. The first downlink data uses 6G as an example, and the second downlink data uses 5G as an example. Network devices can configure 6G frequency domain reference points based on 5G frequency domain reference points, thereby ensuring that the 6G frequency domain reference points are aligned with the 5G frequency domain reference points in the frequency domain.

[0241] In one possible implementation, the first terminal device may determine the original sequence of the first reference signal according to the configuration of the network device.

[0242] In the embodiment of the present application, the original sequence may also be referred to as a base sequence, or a pseudo-random sequence, which is not limited in the embodiment of the present application.

[0243] Exemplarily, the first terminal device determines the original sequence of the first reference signal according to the first parameter and the second parameter configured by the network device and formula (2).

[0244] in, is the number of symbols in a time slot, n SCID Parameters configured for network devices, For n SCID、port Corresponding parameters and the network device configuration parameters are determined, Parameters configured by the base station and Determine, λ represents the index of the code division multiplexing group corresponding to the port of the first reference signal, wherein, is the first parameter configured, and l is the second parameter configured.

[0245] Exemplarily, l is the index of the OFDM symbol in the time slot. Exemplarily, is the index of the current time slot in a frame.

[0246] It can be understood that the above-mentioned first parameter and / or second parameter can be configured in the first configuration information or configured separately, and the embodiments of the present application are not limited to this.

[0247] Exemplarily, the network device sends a system parameter configuration to the first terminal device, and the first terminal device can obtain the system parameter configuration. The corresponding value and the corresponding value of l.

[0248] Exemplarily, the above-mentioned system parameter configuration includes the system parameters corresponding to the second downlink data, or in other words, the above-mentioned system parameter configuration includes a time domain configuration information, and the first terminal device can obtain the time domain configuration information based on the time domain configuration information. and the value corresponding to l.

[0249] An optional understanding is that in the above formula, It can be understood as the time slot index under the configured second system parameter. In the embodiment of the present application, the first parameter configured by the network device is different from the time slot index under the second system parameter, or in other words, the first parameter configured by the network device is the same as the time slot index under the third system parameter, thereby determining that the original sequence of the first reference signal is the same as the original sequence of the second reference signal. Similarly, l can be understood as the index of the OFDM symbol under the configured second system parameter. In the embodiment of the present application, the second parameter configured by the network device is different from the index of the OFDM symbol under the second system parameter, or in other words, the second parameter configured by the network device is the same as the index of the OFDM symbol under the third system parameter, thereby determining that the original sequence of the first reference signal is the same as the original sequence of the second reference signal.

[0250] As shown in Table 3 above, the difference between the EPRE of the DM-RS and the EPRE of the PDSCH is determined by the number of CDM groups used (indexed by port). For example, when the number of CDM groups is 1, the difference between the EPRE of type one DMRS and the PDSCH is 0 dB. For another example, when the number of CDM groups is 2, the difference between the EPRE of type two DMRS and the PDSCH is -3 dB.

[0251] In the embodiment of the present application, the difference between the EPRE of the DM-RS and the EPRE of the PDSCH is independent of the number of CDM groups used. In other words, regardless of the number of CDM groups used, the EPRE of the DM-RS can be a fixed value. For example, the EPRE of the DMRS is configured as a value.

[0252] In the embodiment of the present application, from the perspective of frequency domain configuration, DM-RS configuration can be divided into Type 1 configuration and Type 2 configuration.

[0253] Among them, Type 1 configuration and Type 2 configuration indicate two frequency domain arrangement modes. For example, in Figure 5, in Type 1, DMRS is arranged every other RB in the frequency domain, and in Type 2, DMRS occupies two RBs for every 6 RBs in the frequency domain.

[0254] In one possible implementation, the first reference signal is configured as type one (i.e., Type 1), the number of code division multiplexing groups that do not send data is different, and the difference between the average power on each resource unit corresponding to the first reference signal and the average power on each resource unit corresponding to the first downlink data is a first value.

[0255] Exemplarily, the first value is -3dB.

[0256] In one possible implementation, the first reference signal is configured as type two (i.e., Type 2), the number of code division multiplexing groups that do not send data is different, and the difference between the average power on each resource unit corresponding to the first reference signal and the average power on each resource unit corresponding to the first downlink data is a second value.

[0257] Exemplarily, the second value is -4.77 dB.

[0258] It should be noted that, in the embodiments of the present application, taking downlink data as an example, it can be understood that the above implementation is also applicable to uplink data. For example, the first terminal device receives the fourth configuration information, and the first terminal device sends a third reference signal according to the fourth configuration information, and the third reference signal is used to demodulate the first uplink transmission. The specific implementation method can refer to the above S610 and S620, and will not be repeated here.

[0259] The present application designs a reference signal configuration method, which enables a first reference signal and its corresponding first downlink data to use different system parameters. At the same time, with respect to time domain resource configuration, time domain start symbol, frequency domain resource configuration and physical resource mapping, base sequence generation and EPRE offset design, the first reference signal and the second reference signal and the second downlink data use the resources (including time domain, frequency domain, sequence, etc.) of the second reference signal under the same system parameters to be orthogonal to each other, thereby avoiding mutual interference between the DMRS of one transmission stream and another transmission stream under different communication standards when two downlink data transmissions occupying the same time-frequency resources are transmitted.

[0260] The method provided in the embodiment of the present application is described in detail above in conjunction with Figures 6 to 10. Below, the apparatus provided in the embodiment of the present application is described in detail in conjunction with Figures 11 and 12. It should be understood that the description of the apparatus embodiment corresponds to the description of the method embodiment. Therefore, for matters not described in detail, please refer to the method embodiment above. For the sake of brevity, it will not be repeated here.

[0261] The device is used to implement the above-mentioned embodiments and related implementation methods, and the details that have been described will not be repeated here. As used below, the term "module" can refer to a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are implemented using software, implementation using hardware, or a combination of software and hardware, is also possible and contemplated.

[0262] FIG11 is a schematic structural diagram of a communication device provided in an embodiment of the present application.

[0263] The device 1100 includes a transceiver unit 1110 and a processing unit 1120 , wherein the transceiver unit 1110 can be used to implement corresponding communication functions, and the processing unit 1120 can be used to perform data processing.

[0264] Optionally, the transceiver unit 1110 may also be referred to as a communication interface or communication unit, and may include a transmitting unit and / or a receiving unit. The transceiver unit 1110 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. The transceiver unit 1110 may be configured to perform the transmitting and / or receiving steps in the above-described method embodiments.

[0265] Optionally, the processing unit 1120 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.

[0266] Optionally, the apparatus 1100 further includes 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 1120 executes the instructions stored in the storage unit to cause the communication apparatus to perform the above method.

[0267] In one design, the apparatus 1100 may be used to perform the actions performed by the terminal device in each of the above method embodiments, for example, the apparatus 1100 may be used to perform the actions performed by the terminal device in the above method 600. In this case, the apparatus 1100 may be a component of the terminal device, the transceiver unit 1110 is used to perform the transceiver-related operations on the terminal device side in the above method embodiments, and the processing unit 1120 is used to perform the processing-related operations of the terminal device in the above method embodiments.

[0268] For example, the transceiver unit 1110 is used to receive first configuration information, where the first configuration information includes a first system parameter of a first reference signal, where the first reference signal is used to demodulate first downlink data, and where the first system parameter is different from a second system parameter of the first downlink data; and the processing unit 1120 is used to receive the first reference signal according to the first configuration information.

[0269] It should be understood that the transceiver unit 1110 can also perform other operations performed by the terminal device in any of the above methods 600, which will not be described in detail here.

[0270] In one design, the apparatus 1100 can be used to perform the actions performed by the network device in each of the above method embodiments, for example, the apparatus 1100 can be used to perform the actions performed by the network device in the above method 600. In this case, the apparatus 1100 can be a component of a terminal device, the transceiver unit 1110 is used to perform the transceiver-related operations on the network device side in the above method embodiments, and the processing unit 1120 is used to perform the processing-related operations of the network device in the above method embodiments.

[0271] For example, the transceiver unit 1110 is used to send first configuration information, where the first configuration information includes a first system parameter of a first reference signal, where the first reference signal is used to demodulate first downlink data, and where the first system parameter is different from a second system parameter of the first downlink data; the transceiver unit 1110 is also used to send the first reference signal.

[0272] It should be understood that the transceiver unit 1110 and the processing unit 1120 can also perform other operations performed by the network device in any of the above methods 600, which will not be described in detail here.

[0273] It should also be understood that the device 1100 here is embodied in the form of a functional unit. The term "unit" here can refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combined logic circuit and / or other suitable components that support the described functions. In an optional example, those skilled in the art will understand that the device 1100 can be specifically a network device in the above-mentioned embodiment, and can be used to execute the various processes and / or steps corresponding to the network device in the above-mentioned method embodiments. To avoid repetition, they will not be described here.

[0274] The apparatus 1100 of each of the above-mentioned solutions has the function of implementing the corresponding steps performed by the device in the above-mentioned method, or the apparatus 1100 of each of the above-mentioned solutions has the function of implementing the corresponding steps performed by the access network device in the above-mentioned method. The functions can be implemented by hardware, or the corresponding software can be implemented by hardware. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor to respectively perform the sending and receiving operations and related processing operations in each method embodiment.

[0275] In addition, the transceiver unit 1110 may also be a transceiver circuit (for example, may include a receiving circuit and a sending circuit), and the processing unit may be a processing circuit.

[0276] It should be noted that the apparatus in FIG11 may be a network element or device in the aforementioned embodiment, or may be a chip or chip system, such as a system on chip (SoC). The transceiver unit may be an input / output circuit or a communication interface; the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip. This is not limited here.

[0277] Figure 12 is a schematic diagram of a communication architecture provided in an embodiment of the present application. The communication device 1200 shown in Figure 12 includes a processor 1210 and, optionally, one or more of a memory 1220 and a transceiver 1230. The processor 1210 is coupled to the memory 1220 and configured to execute instructions stored in the memory 1220 to control the transceiver 1230 to transmit and / or receive signals.

[0278] It should be understood that the processor 1210 and memory 1220 can be combined into a processing device, and the processor 1210 is used to execute the program code stored in the memory 1220 to implement the above functions. In a specific implementation, the memory 1220 can also be integrated into the processor 1210, or independent of the processor 1210. It should be understood that the processor 1210 can also correspond to the various processing units in the aforementioned communication device, and the transceiver 1230 can correspond to the various receiving units and transmitting units in the aforementioned communication device.

[0279] It should also be understood that the transceiver 1230 may include a receiver (or receiver) and a transmitter (or transmitter). The transceiver may further include an antenna, and the number of antennas may be one or more. The transceiver may also be a communication interface or interface circuit.

[0280] Specifically, the communication device 1200 may correspond to the terminal device in method 600 according to an embodiment of the present application. The communication device 1200 may execute the steps performed by the terminal device in method 600; the communication device 1200 may correspond to the network device in method 600 according to an embodiment of the present application. The communication device 1200 may execute the steps performed by the network device in method 600. It should be understood that the specific processes of the above-mentioned corresponding steps have been described in detail in the above-mentioned method embodiment and will not be repeated here for the sake of brevity.

[0281] When the communication device 1200 is a chip, the chip includes an interface unit and a processing unit, wherein the interface unit may be an input / output circuit or a communication interface; and the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip.

[0282] During implementation, each step of the above method can be completed by an integrated logic circuit of the hardware in the processor or by instructions in the form of software. 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 processor, or can be executed by a combination of hardware and software modules in the 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 conjunction with its hardware. To avoid repetition, it will not be described in detail here.

[0283] It should be noted that the processor in the embodiments of the present application can be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment can be completed by an integrated logic circuit of the hardware in the processor or by instructions in the form of software. The above processor can be 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 device, a discrete gate or transistor logic device, or a discrete hardware component. The various 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. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers, 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.

[0284] The present application also provides a computer-readable medium having a computer program stored thereon, which implements the functions of any of the above method embodiments when executed by a computer.

[0285] The present application also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

[0286] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. 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 one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. 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 therein. 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 disk (SSD)).

[0287] In the embodiments of this application, words such as "exemplary" and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the word "exemplary" is intended to present concepts in a concrete way.

[0288] It should be understood that references to "embodiments" throughout this specification mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, various embodiments throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0289] It should be understood that in the various embodiments of the present application, the size of the sequence number of each process does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application. The names of all nodes and messages in this application are merely names set by this application for the convenience of description. The names in the actual network may be different. It should not be understood that this application limits the names of various nodes and messages. On the contrary, any name with the same or similar function as the node or message used in this application is regarded as the method or equivalent replacement of this application, and is within the scope of protection of this application.

[0290] It should also be understood that in this application, "when", "if" and "if" all mean that the UE or base station will take corresponding measures under certain objective circumstances. It does not limit the time, and does not require the UE or base station to take judgment actions when implementing it, nor does it mean that there are other limitations.

[0291] Additionally, the terms "system" and "network" are often used interchangeably. The term "and / or" is simply used to describe an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone.

[0292] As used herein, the term "at least one of" or "at least one of" refers to all or any combination of the listed items. For example, "at least one of A, B, and C" can mean: A alone, B alone, C alone, A and B together, B and C together, and A, B, and C together. As used herein, "at least one" means one or more. "A plurality" means two or more.

[0293] It should be understood that the terms "include", "comprising", "having" and their variations mean "including but not limited to", unless specifically emphasized otherwise.

[0294] It should be understood that in various embodiments of the present application, the first, second, and various numerical numbers are merely distinctions for ease of description and are not intended to limit the scope of the embodiments of the present application.

[0295] Those skilled 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 beyond the scope of this application.

[0296] Those skilled in the art will 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 description of the corresponding processes and beneficial effects in the aforementioned method embodiments, and will not be repeated here.

[0297] In the several embodiments provided in this 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 merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. 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.

[0298] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0299] 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.

[0300] 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, part of the technical solution of the present application can be embodied in the form of a software product, which is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0301] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that, Applied to a terminal device, including: Receiving first configuration information, where the first configuration information includes first system parameters of a first reference signal, the first reference signal being used to demodulate first downlink data, and the first system parameters being different from second system parameters of the first downlink data; Receiving the first reference signal according to the first configuration information.

2. The method according to claim 1, wherein One or more of the following parameters are included in the first system parameters or the second system parameters: Subcarrier spacing, width of a resource unit, length of a time slot, length of a symbol.

3. The method according to claim 1 or 2, wherein The time-domain resources of the first reference signal and the time-domain resources of a second reference signal are the same, the second reference signal being used to demodulate second downlink data, the second reference signal and the second downlink data having the same system parameters, and the second downlink data and the first downlink data being downlink data of different transmission streams.

4. The method according to any one of claims 1 to 3, characterized in that, The time-domain resources of the first reference signal and the time-domain resources of a second reference signal are the same, the second reference signal being used to demodulate second downlink data, the second reference signal and the second downlink data having the same system parameters, and the first downlink data and the second downlink data being downlink data under different radio access technologies.

5. The method according to any one of claims 1-4, characterized in that, The method further includes: Determining the length of the time-domain unit for receiving the first reference signal according to the first system parameters.

6. The method according to any one of claims 1-5, characterized in that, The method further includes: Determining the starting time-domain unit of the first reference signal according to the second system parameters and the first system parameters.

7. The method according to claim 6, wherein The index x of the starting time domain unit of the first reference signal n satisfies the following formula (1): x n = [(m + 14*n)*2^(μ2 - μ1)] mod 14, Formula (1) Where m is a parameter configured or preset by the network device, n is an integer, the μ1 value corresponds to the first system parameters, and the μ2 value corresponds to the second system parameters.

8. The method according to any one of claims 1-7, characterized in that, The first reference signal occupies two symbols, and the value of x n is one or more of {1, 8}.

9. The method according to any one of claims 1-7, characterized in that, The first reference signal occupies one symbol, and the value of x n is one of {4, 6}.

10. The method according to any one of claims 1-9, characterized in that, The method further includes: Determining the width of the frequency-domain unit for receiving the first reference signal according to the first system parameters.

11. The method according to claim 10, wherein The method further includes: Determining the frequency-domain reference point of the first reference signal based on third configuration information.

12. The method according to any one of claims 1-11, wherein The original sequence, first parameter, and second parameter of the first reference signal satisfy formula (2): Among them, is the number of symbols in a time slot, n SCID is a parameter configured for the network device consisting of n SCID and port corresponding parameters and determined according to the network device configuration parameters, Configured by the base station parameters and It is determined that λ represents the index of the code division multiplexing group corresponding to the port of the first reference signal, where For the configured first parameter, l is the configured second parameter.

13. The method according to any one of claims 1-12, characterized in that, The first reference signal satisfies one or more of the following: The first reference signal is configured as type one, the number of code division multiplexing groups without transmitting data is different, and the difference between the average power of each resource unit corresponding to the first reference signal and the average power of each resource unit corresponding to the first downlink data is a first value; The first reference signal is configured as type two, the number of code division multiplexing groups without transmitting data is different, and the difference between the average power of each resource unit corresponding to the first reference signal and the average power of each resource unit corresponding to the first downlink data is a second value.

14. A communication method, characterized in that, Applied to a network device, including: Sending first configuration information, where the first configuration information includes first system parameters of a first reference signal, the first reference signal being used to demodulate first downlink data, and the first system parameters being different from second system parameters of the first downlink data; Sending the first reference signal.

15. The method according to claim 14, wherein The method further includes: Send the second configuration information, where the second configuration information includes third system parameters of a second reference signal for demodulating second downlink data, the second reference signal and the second downlink data having the same system parameters, the time-frequency resources of the second reference signal being the same as the time domain resources of the first reference signal, and the second downlink data being transmitted on the same carrier as the first downlink data.

16. The method according to claim 14 or 15, characterized in that, The time domain resources of the first reference signal are the same as those of the second reference signal. The second reference signal is used to demodulate second downlink data, and the second reference signal and the second downlink data have the same system parameters. The first downlink data and the second downlink data are downlink data under different radio access technologies.

17. The method according to any one of claims 14-16, characterized in that, The first system parameter, the second system parameter, or the third system parameter includes one or more of the following parameters: Subcarrier spacing, width of a resource element, length of a time slot, length of a symbol.

18. The method according to any one of claims 14 - 17, characterized in that, The method further includes: Send a first parameter and a second parameter, where the first parameter is used to indicate The value of, and the second parameter is used to indicate the value of l; The original sequences of the first parameter, the second parameter, and the first reference signal satisfy formula (2): Among them, is the number of symbols in a time slot, n SCID is a parameter configured for the network device consisting of n SCID , port corresponding parameters and determined according to the network device configuration parameters, Configured by the base station parameters and It is determined that λ represents the index of the code division multiplexing group corresponding to the port of the first reference signal, where is the first parameter, and l is the second parameter.

19. The method according to any one of claims 14-18, characterized in that, The first reference signal satisfies one or more of the following: The first reference signal is configured as type one, with different numbers of code division multiplexing groups without data transmission, and the difference between the average power of each resource element corresponding to the first reference signal and the average power of each resource element corresponding to the first downlink data is a first value; The first reference signal is configured as type two, with different numbers of code division multiplexing groups without data transmission, and the difference between the average power of each resource element corresponding to the first reference signal and the average power of each resource element corresponding to the first downlink data is a second value.

20. A communication device, characterized in that, Includes a unit for performing the method according to any one of claims 1 to 13 or 14 to 19.

21. A communication device, characterized in that, Includes a processor coupled to a memory. The memory is used to store a computer program or instructions, and the processor is used to execute the computer program or instructions in the memory, so that the device performs the method according to any one of claims 1 to 13, or performs the method according to any one of claims 14 to 19.

22. A computer-readable storage medium, characterized in that, A computer program or instructions are stored on the computer-readable storage medium. When the computer program or instructions are run on a computer, the method according to any one of claims 1 to 19 is executed.

23. A chip system, characterized in that, Includes: a processor for calling and running a computer program from a memory, so that a communication device equipped with the chip system performs the method according to any one of claims 1 to 19.

24. A computer program product, characterized in that, When the computer program product is run on a computer, the method according to any one of claims 1 to 19 is executed.

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