Communication method and communication device

Abstract

Provided are a communication method and a communication device, the method comprising: a terminal device receiving first configuration information, the first configuration information comprising a first system parameter of a first reference signal, the first reference signal being used for demodulating first downlink data, the first system parameter being different from a second system parameter of the first downlink data; and receiving the first reference signal according to the first configuration information. In the embodiment of the invention, the network equipment can configure the system parameter of the reference signal, so that the system parameter of the enabled reference signal can be different from the system coefficient of the data used for demodulating by the reference signal, thereby avoiding the mutual interference between one transport stream and the reference signal of another transport stream under different communication systems, and improving the channel estimation performance.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and more particularly, to a communication method and a communication device. Background Art

[0002] In the evolution and development of wireless communication technologies, the next-generation wireless communication system may build a network on the basis of the existing wireless communication system and enhance its communication capabilities. For example, on the basis of the evolution from the 5th Generation (5G) mobile communication system to 5G-Advanced (5G-A) technology, the next-generation wireless communication system may update the software based on the implementation of 5G hardware devices, so as to enable rapid network deployment and establish a market lead.

[0003] In this network construction mode, the next-generation wireless communication system may serve 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.

[0004] During downlink data transmission, demodulation reference signals are usually inserted into the time-frequency resources of downlink data transmission so that the terminal can correctly obtain the channel information of downlink data transmission. When different transmission streams are transmitted on the same carrier, the sets of system parameters corresponding to the two transmission streams are different, resulting in possible interference between the demodulation reference signals corresponding to the two transmission streams, affecting the channel estimation performance and reducing the transmission performance. Summary of the Invention

[0005] This application provides a communication method and a communication device for improving the channel estimation performance.

[0006] In a first aspect, a communication method is provided. This method can 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 functions of the terminal device. This application does not limit this.

[0007] The method includes: receiving first configuration information, where the first configuration information includes first system parameters of a first reference signal, the first reference signal is used to demodulate first downlink data, and the first system parameters are different from second system parameters of the first downlink data;

[0008] Receiving the first reference signal according to the first configuration information.

[0009] Generally speaking, the system parameters used for downlink transmission are the same as the system parameters corresponding to the reference signals used for demodulating downlink transmission. However, in the scenario of co-carrier transmission of data with different communication systems, if the system parameters used for two transmission streams are different, the data of the two transmission streams may interfere with the reference signals of each other. In this application, the network device can configure the system parameters of the reference signals, enabling the system parameters of the reference signals to be different from the system parameters of the data for which the reference signals are used for demodulation, thereby avoiding the mutual interference between the reference signals of one transmission stream and another transmission stream under different communication systems, and thus improving the channel estimation performance.

[0010] In combination with the first aspect, in a certain implementation manner of the first aspect, the first system parameter or the second system parameter includes one or more of the following parameters: subcarrier spacing, width of a resource unit, length of a time slot, length of a symbol.

[0011] In combination with the first aspect, in a certain implementation manner of the first aspect, the time-domain resources of the first reference signal are the same as the time-domain resources of the second reference signal, the second reference signal is used for demodulating 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.

[0012] In combination with the first aspect, in a certain implementation manner 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.

[0013] In this technical solution, the time-domain resources of the first reference signal are the same as the time-domain resources of the second reference signal of the second downlink data. Then, the first downlink data is not transmitted on this time-domain resource, thereby avoiding the interference of the first downlink data on the reference signal of the transmission stream of the second downlink data. Or rather, the reference signals of the two transmission streams are transmitted on the same time-domain resource, and thus there will be no interference of data on the reference signal.

[0014] 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 systems.

[0015] In combination with the first aspect, in a certain implementation manner of the first aspect, the transmission stream of the first downlink data and the transmission stream of the second downlink data are two transmission streams of different systems.

[0016] 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.

[0017] In combination with 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.

[0018] In combination with the first aspect, in a certain implementation of the first aspect, the starting time-domain unit of the first reference signal is determined according to the second system parameter and the first system parameter.

[0019] In a possible example, the starting time-domain unit of the first reference signal is the starting OFDM symbol occupied by the first reference signal within a time slot.

[0020] 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 n satisfies the following formula (1):

[0021] x n = [(m + 14 * n) * 2^(μ2 - μ1)] mod 14, Formula (1),

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

[0023] In an optional implementation, n can 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 n can be reflected in tabular form.

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

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

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

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

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

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

[0031] In combination with the first aspect, in a certain implementation of the first aspect, the third configuration information is configured by the network device. For example, the network device can configure the frequency-domain reference point of the first reference signal according to the frequency-domain reference point of the second reference signal, so as to ensure that the frequency-domain reference point of the first reference signal is aligned with the frequency-domain reference point of the second reference signal in the frequency domain.

[0032] Among them, the third configuration information can be the same configuration information as the first configuration information, or can be independent configuration information.

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

[0034]

[0035] Among them, is the number of symbols in a time slot, n SCID is a parameter configured by the network device, is determined by n SCID、port corresponding parameter and the network device configuration parameter, is determined by the base station configuration parameter and determined, λ represents the index of the code division multiplexing group corresponding to the port of the first reference signal, where is the configured first parameter, and l is the configured second parameter.

[0036] In combination with the first aspect, in a certain implementation of the first aspect, the original sequence can also be called the base sequence, or a pseudo-random sequence.

[0037] Exemplarily, the above is the configured first parameter, and l is the index of the OFDM symbol in the time slot.

[0038] Exemplarily, the above l is the configured second parameter, is the index of the current time slot in a frame.

[0039] Exemplarily, the network device sends system parameter configuration to the first terminal device, and the first terminal device can calculate according to the system parameter configuration to obtain The corresponding value and the value corresponding to l. Among them, the system parameter configuration can be the system parameter corresponding to the second downlink data.

[0040] Combined with the first aspect, in a certain implementation manner of the first aspect, the first reference signal satisfies one or more of the following: the first reference signal is configured as type one, and the number of code division multiplexing groups without data transmission is different. 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, and the number of code division multiplexing groups without data transmission is different. 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.

[0041] Among them, Type1 and Type2 indicate two ways of frequency domain arrangement. In Type1, DMRS is arranged at an interval of one RB in the frequency domain. In Type2, DMRS occupies two RBs every 6 RBs in the frequency domain. For specific details, please refer to the content later Figure 5 and will not be elaborated here.

[0042] Combined with the first aspect, in a certain implementation manner of the first aspect, when the first reference signal is configured as type one, the difference is -3 dB; when the first reference signal is configured as type two, the difference is -4.77 dB.

[0043] In a second aspect, a communication method is provided. This method can be executed by a network device, or can be executed by a chip or circuit configured in the network device, or can also be executed by a logic module or software that can implement all or part of the functions of the network device. This application does not make any limitations in this regard.

[0044] The method includes: sending first configuration information, where the first configuration information includes first system parameters of a first reference signal, and the first reference signal is used to demodulate first downlink data, and the first system parameters are different from second system parameters of the first downlink data; sending the first reference signal.

[0045] In this technical solution, the network device can configure the system parameters of the reference signal, so that the system parameters of the enabled reference signal can be different from the system coefficients of the data used by the reference signal for demodulation, thereby avoiding interference between the reference signals of one transmission stream and another transmission stream under different communication systems, and thus improving the channel estimation performance.

[0046] In combination with the second aspect, in a certain implementation manner of the second aspect, the method further includes: sending 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 first reference signal have the same time-domain resources, and the second downlink data and the first downlink data are transmitted on the same carrier wave.

[0047] In this technical solution, the network device can send the system parameters of the second downlink data to another terminal device through the same carrier wave, and the system parameters of the second downlink data are the same as the system parameters of the corresponding second reference signal. And the second reference signal and the first reference signal have the same time-domain resources, so the first downlink data will not be transmitted in this time-domain resource, thus avoiding interference from the first downlink data to the reference signal of the transmission stream of the second downlink data. Or rather, the reference signals of the two transmission streams are transmitted in the same time-domain resource, and thus there will be no interference between the data and the reference signal.

[0048] 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 radio access technologies.

[0049] In combination with the second aspect, in a certain implementation manner of the second aspect, the transmission stream of the first downlink data and the transmission stream of the second downlink data are two transmission streams of different radio access technologies.

[0050] In combination with the second aspect, in a certain implementation manner of the second aspect, send third configuration information, where the third configuration information is used for the terminal device to determine the frequency-domain reference point of the first reference signal. For example, the network device can configure the frequency-domain reference point of the first reference signal according to the frequency-domain reference point of the second reference signal, so as to ensure that the frequency-domain reference point of the first reference signal is aligned with the frequency-domain reference point of the second reference signal in the frequency domain.

[0051] In combination with the second aspect, in a certain implementation manner of the second aspect, 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 first parameter, the second parameter, and the original sequence of the first reference signal satisfy formula (2):

[0052]

[0053] where is the number of symbols in a time slot, n SCID is a parameter configured by the network device, is determined by the parameter corresponding to n SCID、port and the network device configuration parameter, and is determined by the base station configuration parameter and by the base station configuration parameter 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.

[0054] Combined with the second aspect, in a certain implementation manner of the second aspect, the original sequence can also be referred to as the base sequence, or as a pseudo-random sequence.

[0055] Exemplarily, the above is the configured first parameter, and l is the index of the OFDM symbol in the time slot.

[0056] Exemplarily, the above l is the configured second parameter, which is the index of the current time slot in a frame.

[0057] Exemplarily, the network device sends system parameter configuration to the first terminal device, and the first terminal device can calculate the corresponding value and the value corresponding to l according to this system parameter configuration. Among them, this system parameter configuration can be the system parameter corresponding to the second downlink data.

[0058] Combined with the second aspect, in a certain implementation manner of the second aspect, the first reference signal satisfies one or more of the following: the first reference signal is configured as type one, and the number of code division multiplexing groups without data transmission 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 the first value; the first reference signal is configured as type two, and the number of code division multiplexing groups without data transmission 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 the second value.

[0059] Among them, type one (Type1) and type two (Type2) indicate two ways of frequency domain arrangement. In type one, DMRS is arranged with a spacing of one RB in the frequency domain. In type two, DMRS occupies two RBs every 6 RBs in the frequency domain. For specific details, please refer to the content later Figure 5 and will not be elaborated here.

[0060] In a third aspect, a communication device is provided. This device can be a terminal device, or a chip or circuit configured in the terminal device, or a logic module or software that can implement all or part of the functions of the terminal device. This application does not make any limitations in this regard.

[0061] The device includes: a transceiver unit, configured to receive first configuration information, where the first configuration information includes first system parameters of a first reference signal, the first reference signal being used for demodulating first downlink data, and the first system parameters being different from second system parameters of the first downlink data; and a processing unit, configured to receive the first reference signal according to the first configuration information.

[0062] In combination with the third aspect, in a certain implementation manner of the third aspect, the processing unit is further configured to determine the length of a time domain unit for receiving the first reference signal according to the first system parameters.

[0063] In combination with the third aspect, in a certain implementation manner of the third aspect, the processing unit is further configured to determine a starting time domain unit of the first reference signal according to the second system parameters and the first system parameters.

[0064] In combination with the third aspect, in a certain implementation manner of the third aspect, the processing unit is further configured to determine the width of a frequency domain unit for receiving the first reference signal according to the first system parameters.

[0065] Exemplarily, determine the subcarrier spacing of the first reference signal.

[0066] In combination with the third aspect, in a certain implementation manner of the third aspect, the processing unit is further configured to determine a frequency domain reference point of the first reference signal based on third configuration information.

[0067] The beneficial effects of the third aspect and some possible implementation manners have been described in detail in the first aspect. For specific content, reference can be made to the first aspect. For the sake of brevity, it will not be elaborated here.

[0068] In a fourth aspect, a communication device is provided. The device may be a network device, or a chip or circuit configured in a network device, or a logic module or software capable of implementing all or part of the functions of a network device. This application does not make any limitation in this regard.

[0069] The device includes: a transceiver unit, configured to send first configuration information, where the first configuration information includes first system parameters of a first reference signal, the first reference signal being used for demodulating first downlink data, and the first system parameters being different from second system parameters of the first downlink data; and the transceiver unit is further configured to send the first reference signal.

[0070] In combination with the fourth aspect, in a certain implementation of the fourth aspect, the method further includes: a transceiver unit, further configured to send second configuration information, where the second configuration information includes third system parameters 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.

[0071] In combination with the fourth aspect, in a certain implementation of the fourth aspect, send third configuration information, where the third configuration information is used for a terminal device to determine a frequency domain reference point of the first reference signal. For example, a network device may configure the frequency domain reference point of the first reference signal according to the frequency domain reference point of the second reference signal, so as to ensure that the frequency domain reference points of the first reference signal and the second reference signal are aligned in the frequency domain.

[0072] In combination 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, where the first parameter is used to indicate the value of, and the second parameter is used to indicate the value of l; the first parameter and the second parameter are used for the terminal device to determine the original sequence of the first reference signal based on formula (2),

[0073]

[0074] where, is the number of symbols in a time slot, n SCID is a parameter configured by the network device, is determined by n SCID、port corresponding parameters and the network device configuration parameters, is determined by the base station configuration parameters and , 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.

[0075] In the embodiments of the present application, the original sequence may also be referred to as a base sequence, or a pseudo-random sequence, and the embodiments of the present application do not limit this.

[0076] Exemplarily, the above is the configured first parameter, and l is the index of the OFDM symbol in the time slot.

[0077] Exemplarily, the above l is the configured second parameter, is the index of the current time slot in a frame.

[0078] Exemplarily, the network device sends system parameter configuration to the first terminal device, and the first terminal device can calculate the corresponding values and l corresponding values according to the system parameter configuration. Among them, the system parameter configuration may be the system parameter corresponding to the second downlink data. The beneficial effects of the fourth aspect and some possible implementation manners have been described in detail in the second aspect. For specific content, reference can be made to the second aspect. For the sake of brevity, it will not be repeated here.

[0079] The beneficial effects of the fourth aspect and some possible implementation manners have been described in detail in the second aspect. For specific content, reference can be made to the second aspect. For the sake of brevity, it will not be repeated here.

[0080] In a fifth aspect, the present application provides a communication device, including a processor for executing the methods provided in the above aspects.

[0081] For operations such as sending and obtaining / receiving involved by the processor, if there is no special description, or if it does not conflict with its actual role or internal logic in the relevant description, it can be understood as operations such as outputting, receiving, and inputting by the processor, or it can also be understood as operations of sending and receiving performed by the radio frequency circuit and the antenna. The present application does not make any limitations in this regard.

[0082] Optionally, the communication device further includes: a memory for storing programs; the processor for executing the computer programs or instructions stored in the memory to execute the methods provided in any of the above aspects or their implementation manners.

[0083] In a sixth aspect, the present application provides a communication system, which includes a terminal device and a network device.

[0084] 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.

[0085] In an eighth aspect, the present application provides a computer-readable storage medium, which stores computer programs or instructions. When the computer programs or instructions are run on a computer, the methods provided in any of the above aspects or their implementation manners are executed.

[0086] In a ninth aspect, the present application provides a computer program product containing instructions. When the computer program product is run on a computer, the methods provided in any of the above aspects or their implementation manners are executed.

[0087] In a tenth aspect, the present application provides a chip, which includes a processor and a communication interface. The processor reads the instructions stored on the memory through the communication interface and executes the methods provided in any of the above aspects or their implementation manners.

[0088] Optionally, as an implementation, the chip further includes a memory in which computer programs or instructions are stored, and the processor is configured to execute the computer programs or instructions stored on the memory. When the computer programs or instructions are executed, the processor is configured to execute the method provided by any of the above aspects or its implementation.

[0089] Wherein, 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

[0090] Figure 1 is a schematic diagram of a communication system 100 applicable to an embodiment of the present application.

[0091] Figure 2 is a schematic diagram of a space division multiplexing scenario applicable to an embodiment of the present application.

[0092] Figure 3 is a scenario of co-carrier of 5G and 6G applicable to an embodiment of the present application.

[0093] Figure 4 is a schematic diagram of a time domain resource allocation method applicable to an embodiment of the present application.

[0094] Figure 5 is a schematic diagram of a time domain resource allocation method applicable to an embodiment of the present application.

[0095] Figure 6 is a schematic diagram of a communication method applicable to an embodiment of the present application.

[0096] Figure 7 is a schematic diagram of resource allocation for transmitting two downlink data on a co-carrier applicable to an embodiment of the present application.

[0097] Figure 8 is a schematic diagram of time domain configuration of first downlink data and second downlink data applicable to an embodiment of the present application.

[0098] Figure 9 is a schematic diagram of time domain configuration of first downlink data and second downlink data applicable to an embodiment of the present application.

[0099] Figure 10 is a schematic diagram of a pattern of a frequency domain reference point applicable to an embodiment of the present application.

[0100] Figure 11 is a block diagram of a communication device applicable to an embodiment of the present application.

[0101] Figure 12 is a block diagram of a communication device applicable to an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0102] The technical solutions in the present application will be described below in conjunction with the accompanying drawings.

[0103] The technical solutions provided by the present application can be applied to various communication systems, such as: the fifth generation (5G) or new radio (NR) system, the long term evolution (LTE) system, the LTE frequency division duplex (FDD) system, the LTE time division duplex (TDD) system, etc. The technical solutions provided by the present application can also be applied to future communication systems, such as the sixth generation mobile communication system. The technical solutions provided by the present application can also be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine type communication (MTC), and the Internet of Things (IoT) communication system or other communication systems.

[0104] 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 applied to 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 wearables, smart transportation, smart city drones, robots, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery and other scenarios. The terminal device can be a terminal in any of the above scenarios, such as an MTC terminal, an IoT terminal, etc. The terminal device can be a user equipment (UE), 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 laptop computer, a wireless modem, a handset, a laptop computer, a computer with wireless transceiver functions, 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-helicopter, a quad-copter, or an airplane, etc.), a ship, a remote control device, a smart home device, an industrial device, or a device built into the above devices (such as a communication module, a modem, or a chip in the above devices), or other processing devices connected to a wireless modem. For the convenience of description, the terminal device will be described below by taking the terminal or UE as an example.

[0105] It should be understood that in some scenarios, the UE can also be used as a base station. For example, the UE can act as a scheduling entity, which provides sidelink signals between UEs in scenarios such as V2X, D2D, or P2P.

[0106] In the embodiments of the present application, the device for implementing the functions of the terminal device may be the terminal device itself, or a device capable of supporting the terminal device to implement such functions, such as a chip system or a chip, and this device may be installed in the terminal device. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.

[0107] The network device in the embodiments of the present application may be a device for communicating with the terminal device, and this network device may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects the terminal device to the wireless network. The base station may generally cover various names as follows, or be replaced with the following names, such as: Node B, evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master station, slave station, multi-mode radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, positioning node, etc. The 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. The base station may also refer to a communication module, a modem or a chip disposed in the foregoing device or apparatus. The base station may also be a mobile switching center and a device that undertakes the function of the base station in D2D, V2X, M2M communications, a network-side device in a 6G network, a device that undertakes the function of the base station in a future communication system, etc. The base station may support networks with the same or different access technologies. The embodiments of the present application do not limit the specific technologies and specific device forms adopted by the network device.

[0108] In some scenarios, the network device can also be a module or unit capable of implementing some or all of the functions of a base station. For example, the network device can be a central unit (CU), a distributed unit (DU), a CU and a DU, a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. The CU and the DU can be set separately, or can also be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as included in a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0109] In different systems, the CU (or CU-CP and CU-UP), DU, or RU can also have different names, but those skilled in the art can understand their meanings. For example, the network device can be a network device or a module of a network device in an open radio access network (ORAN) system. In the ORAN system, the CU can also be called an open (O)-CU, the DU can also be called an O-DU, the CU-CP can also be called an O-CU-CP, the CU-UP can also be called an O-CU-UP, and the RU can also be called an O-RU. Any one of the CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0110] The base station can be fixed or mobile. For example, a helicopter or a drone can be configured to act as a mobile base station, and one or more cells can move according to the position of the mobile base station. In other examples, a helicopter or a drone can be configured to be used as a device for communicating with another base station.

[0111] In the embodiments of this application, the device for implementing the functions of the network device can be a terminal device, or can also be a device capable of supporting the network device to implement the functions, such as a chip system or a chip, and this device can be installed in the network device. In the embodiments of this application, the chip system can be composed of chips, or can also include chips and other discrete devices.

[0112] Network devices and terminal devices can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed on aircraft, balloons, and satellites in the air. In the embodiments of the present application, the scenarios where the network devices and terminal devices are located are not limited.

[0113] First, a network architecture applicable to the embodiments of the present application will be briefly introduced as follows.

[0114] See Figure 1 , as an example, Figure 1 is a schematic diagram of a communication system 100 applicable to the embodiments of the present application. As Figure 1 shown, the wireless communication system 100 may include at least one network device, such as Figure 1 the network device 110 shown. The wireless communication system 100 may also include at least one terminal device, such as Figure 1 the terminal device 120 and the terminal device 130 shown. Both the network device and the terminal device can be configured with multiple antennas, and the network device and the terminal device can communicate using multi-antenna technology. Terminal devices can also communicate with each other. For example, terminal devices can communicate directly with each other. For another example, terminal devices can communicate with each other through other communication devices, such as network devices or other terminal devices.

[0115] Among them, when the network device and the terminal device communicate, the network device can manage one or more cells, and there can be an integer number of terminal devices in one cell. Optionally, the network device 110 and the terminal device 120 form a single-cell communication system. Without loss of generality, the cell is referred to as cell #1. The network device 110 can be the network device in cell #1, or the network device 110 can serve the terminal device (such as the terminal device 120) in cell #1.

[0116] It should be noted that a cell can be understood as the area within the wireless signal coverage of a network device.

[0117] It should be understood that Figure 1 for the sake of easy understanding, this is a simplified schematic diagram for illustration. The wireless communication system 100 may also include other network devices or other terminal devices, Figure 1 which are not shown in . The embodiments of the present application can be applicable to any communication scenario where a sending-end device and a receiving-end device communicate.

[0118] The fifth-generation mobile communication system has the characteristics of massive multiple-input multiple-output (Massive MIMO). When transmitting different information in the downlink, for example, it may be transmitting different information for different users, or transmitting multiple streams of different information for the same user simultaneously. Precoding can be used to enable different transmissions to have different beam directions, thereby realizing spatial division multiplexing. Through spatial division multiplexing, different transmissions can use the same time-frequency resources, improving transmission throughput and resource utilization efficiency.

[0119] See Figure 2 , as an example, Figure 2 shows a schematic diagram of a spatial division multiplexing scenario. In this scenario, the network device can use the same time-frequency resources to transmit different transmission streams to different users through precoding. As shown in Figure 2 , the network device 210 can send the downlink transmission stream #1 to user #1 and also send the downlink transmission stream #2 to user #2. Among them, the transmission stream #1 and the transmission stream #2 occupy the same time-frequency resources.

[0120] With the evolution of wireless network generations, the next-generation wireless communication system may be built on the existing wireless communication system and enhance communication capabilities. For example, on the basis of the evolution of the fifth-generation mobile communication system (The 5th Generation, 5G) to 5G-Advanced (5G-A) technology, the next-generation wireless communication system may update the software based on 5G hardware devices, enabling rapid network deployment and establishing a market lead. The following takes the scenario of 5G and 6G co-carrier as an example for illustration.

[0121] See Figure 3 , as an example, Figure 3 is a schematic diagram of the scenario applicable to the embodiments of the present application.

[0122] Figure 3 shows the scenario of 5G and 6G co-carrier. In this scenario, the 5G and 6G networks can be served based on the existing (5G) hardware module, that is, 5G / 6G uses the same hardware module for transmission. The frequency band supported by the hardware module is fixed. Therefore, whether it is 5G or 6G, the frequency band used during transmission is the same. In other words, the 5G / 6G network transmits its respective transmission streams based on the same frequency band.

[0123] To facilitate the understanding of the embodiments of the present application, the terms and background involved in the present application will be briefly introduced below.

[0124] 1. Antenna port

[0125] An antenna port is abbreviated as a port. It can be understood as the transmitting antenna recognized by the receiving end, or the transmitting antennas that can be distinguished in space. For each virtual antenna, an antenna port can be configured, and each virtual antenna can be a weighted combination of multiple physical antennas. According to the different signals carried, the antenna ports can be divided into reference signal ports and data ports. Among them, the reference signal ports can include, but are not limited to, DMRS ports, channel state information reference signal (CSI-RS) ports, etc.

[0126] 2. Time-frequency resources

[0127] In the embodiments of the present application, data or information can be carried by time-frequency resources. The time-frequency resources can include at least one of resources in the time domain and resources in the frequency domain. Among them, in the time domain, the time-frequency resources can include one or more time domain units (which can also be referred to as time units, time units, etc.); in the frequency domain, the time-frequency resources can include one or more frequency domain units.

[0128] Among them, a time domain unit can be one symbol or several symbols, or one slot, or one mini-slot, or one subframe. Among them, one slot can be composed of 7 or 14 symbols; one mini-slot can include at least one symbol. For example, one 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 one subframe in the time domain can be 1 millisecond (ms). It should be understood that the above-listed time domain unit sizes are only for the convenience of understanding the solution of the present application and do not limit the protection scope of the present application. It can be understood that the above time domain unit sizes can be other values, and the present application does not make any limitations. In the present application, the length of the time domain unit can include the length of the slot and / or the length of the symbol. The symbol in the present application can be an orthogonal frequency division multiplexing (OFDM) symbol. In the following embodiments, the OFDM symbol is taken as an example for illustration.

[0129] 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) (which can also be called a resource unit or a resource particle), or a carrier, or a serving cell.

[0130] 3. Demodulation reference signal (DMRS)

[0131] 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 transmitted data, a reference signal can be inserted into the time-frequency resources of the data transmission. For example, a demodulation reference signal (DM-RS).

[0132] In a new radio (NR) system, DMRS is used for data channels, such as the physical uplink share channel (PUSCH), or control channels, such as the equivalent channel matrix estimation of the physical downlink control channel (PDCCH), and thus is used for the detection and demodulation of data on the corresponding channels.

[0133] Taking the physical downlink shared channel (PDSCH) as an example, DMRS is usually precoded in the same way as the transmitted data signal, so as to ensure that DMRS and the data signal experience the same equivalent channel. Assume that the DMRS vector transmitted by the transmitter is s, and the data signal vector transmitted is x. DMRS and the data signal are precoded in the same way (multiplied by the same precoding matrix). The received data signal vector y and the DMRS vector r at the receiver can be expressed by formulas (3) and (4) respectively:

[0134]

[0135]

[0136] Among them, Denote the equivalent channel that the data signal and DMRS experience, where n represents additive noise. Based on the known DMRS vector s, the receiving end can obtain an estimate of the equivalent channel using channel estimation algorithms such as least square (LS) channel estimation, minimum mean square error (MMSE) channel estimation, etc. Based on the equivalent channel, the demodulation of the data signal can be completed.

[0137] With the introduction of MIMO technology into wireless communication systems, the transmitting end can transmit multi-stream data on the same time-frequency resources, and the receiving end can recover all of them. At this time, DMRS is used to estimate the equivalent channel matrix, and its dimension can be N R ×R, where N R represents the number of receiving antennas, and R represents the number of transmission streams (also known as the number of transmission layers, spatial layers). Usually, one DMRS port corresponds to one transmission stream, that is, for MIMO transmission with R transmission streams, the number of DMRS ports required is R. To ensure the quality of channel estimation, the DMRS ports corresponding to multiple transmission streams are orthogonal ports.

[0138] For one DMRS port, to perform channel estimation on different time-frequency resources, multiple DMRSs need to be sent on multiple time-frequency resources. The multiple DMRSs corresponding to one port correspond to one DMRS sequence. One DMRS sequence includes multiple DMRS sequence elements.

[0139] Taking the DMRS sequence being generated from a gold sequence as an example, the nth DMRS sequence element in the DMRS sequence r l (n) can be generated by the following formula:

[0140]

[0141] where c(n) is a pseudo-random sequence, and c(n) can be a gold sequence with a sequence length of 31; for the sequence c(n) with an output length of M PN , n = 0, 1,..., M PN -1, it can be determined by formula (6):

[0142]

[0143] x2(n + 31) = (x2(n + 3) + x2(n + 2) + x2(n + 1) + x2(n)) mod 2

[0144] where N C= 1600, the first m-sequence x1(n) can be initialized as x1(0) = 1, x1(n) = 0, n = 1, 2,..., 30, and the second m-sequence x2(n) can be initialized by parameter c init c init can be determined by formula (7):

[0145]

[0146] where l represents the index value of the OFDM symbol in a time slot; is the number of symbols included in a time slot; is the time slot index within a system frame; is the initialization parameter, and its value can be 0 or 1; can be configured by higher-layer signaling, which is related to the cell (identifier, ID) and usually can be equal to the cell ID; λ represents the code division multiplexing (CDM) group index corresponding to the DMRS port.

[0147] The time-frequency resource configuration of DMRS is described in detail below.

[0148] From the perspective of the number of occupied symbols, the DM-RS configuration can be divided into single-symbol DM-RS and double-symbol DM-RS; from the perspective of the mapping method, the DM-RS configuration can be divided into Type A mapping and Type B mapping; from the perspective of the time-domain configuration position, the DM-RS configuration can be divided into preposed DM-RS and additional DM-RS; from the perspective of the frequency-domain configuration method, the DM-RS configuration can be divided into Type 1 configuration and Type2 configuration.

[0149] 1) For the time-domain starting symbol position configuration of PDSCH DM-RS:

[0150] a) For the Type A mapping method:

[0151] i. The starting position of the preposed DM-RS is the OFDM symbol with an index of 2 / 3 (actually the 3 / 4th OFDM symbol in the time slot);

[0152] 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 combined values: 7, 9, 11, 12, 6&9, 7&11, 5&8&11;

[0153] iii. In the double-symbol DM-RS scenario, the index of the starting position of the additional DM-RS can be configured as the following combined values: 8, 10;

[0154] b) For the Type B mapping method:

[0155] i. The starting position of the preposed DM-RS is the first OFDM symbol for PDSCH scheduling (flexibly configurable according to scheduling);

[0156] 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 combined values: 4, 6, 7, 8, 9, 3&6, 4&7, 4&8, 5&9, 3&6&9;

[0157] iii. In the double-symbol DM-RS scenario, the index of the starting position of the additional DM-RS can be configured as the following combined values: 5, 7, 8.

[0158] See Figure 4 , as an example, Figure 4 is a schematic diagram of the time-domain resource configuration method applicable to the embodiments of the present application. As Figure 4 shown, taking the subcarrier spacing of 15 KHZ as an example. In one time slot, the OFDM symbol with the starting position index of 2 for single-symbol DMRS; the OFDM symbol with the starting position index of 3 for double-symbol DMRS; the OFDM symbol with the additional pilot position index of 9 for single-symbol DMRS.

[0159] 2) For the configuration of the frequency-domain resources of PDSCH DM-RS:

[0160] a) For the Type 1 configuration method, for the DM-RS corresponding to a certain port, its frequency-domain resources are 6 subcarriers in each RB (including 12 consecutive subcarriers), with a spacing of 1 subcarrier between every 2 subcarriers;

[0161] b) For the Type 2 configuration method, for the DM-RS corresponding to a certain port, its frequency-domain resources are 2 consecutive subcarriers among 6 consecutive subcarriers in each RB (including 12 consecutive subcarriers), with a spacing of 6 subcarriers between every 2 groups of subcarriers.

[0162] See Figure 5 , as an example, Figure 5 is a schematic diagram of the frequency-domain resource configuration method applicable to the embodiments of the present application. As Figure 5 shown, taking 1 RB as an example, on 12 consecutive subcarriers, the DMRS of Type1 occupies 6 subcarriers, and there is a spacing of 1 subcarrier between every two subcarriers; the DMRS of Type2 occupies 2 subcarriers on every 6 subcarriers, and there is a spacing of 6 subcarriers between every 2 groups of subcarriers.

[0163] 4. Average power (energy per UE, EPRE) offset of each RE

[0164] In the existing protocol, the difference between the EPRE of DM-RS and the EPRE of PDSCH is determined by the number of CDM groups used (indexed by port). Table 1 below shows the relationship between the EPRE of DM-RS and the EPRE of PDSCH.

[0165] Table 1

[0166] The number of CDM groups that do not send data DMRS-type1 DMRS-type2 1 0dB 0dB 2 -3dB -3dB 3 - -4.77dB

[0167] Based on the above configuration, it can be seen that the number of transmission streams corresponding to different port indexes is orthogonal. That is, for a certain DM-RS frequency domain configuration (such as Type 1), different indexes can be configured for different transmission streams to distinguish DM-RS, so as to obtain good channel estimation and transmission performance.

[0168] 5. System parameter set

[0169] The system parameter set (numerology) refers to the set of parameters used by the transmission stream during transmission. The system parameter set may include subcarrier spacing, slot length, symbol length, etc.

[0170] In the embodiments of the present application, the system parameter set may also be referred to as system parameters. In specific embodiments, system parameters are taken as an example.

[0171] Generally speaking, the system parameter set (numerology) can be indicated by the parameter μ. Specifically, based on the value of the parameter μ, the parameters used by the transmission system can be determined, as shown in Table 2 below (1 frame = 10 ms, 1 subframe = 1 ms).

[0172] Table 2

[0173]

[0174] It can be seen from the above table that the subcarrier spacing, slot, and OFDM symbol length corresponding to different system parameter sets are all different. At the same time, for a general configuration method, the subcarrier spacing between different system parameter sets is 2 m times, and the corresponding slot / OFDM symbol length is 2 -m times. At the same time, regardless of the system parameter set used, the number of OFDM symbols in a slot is always 14.

[0175] Generally, regardless of the system parameter set used by the transport stream (i.e., subcarrier spacing, absolute slot length, etc., also known as numerology), the configuration of PDSCH DM-RS is determined relative to the configuration of the current transport stream (such as the starting symbol, frequency-domain distribution, sequence mapping method, etc.). That is, the system parameter set used by PDSCH DM-RS is the same as the system parameter set used by the transport stream. In other words, generally for a fixed carrier, in a scenario served by only a single radio access technology (RAT) (such as only 5G network service), the system parameter set in a time slot is the same, and the DM-RS resources are orthogonal to each other, ensuring the channel estimation performance.

[0176] 6. Co-carrier transmission

[0177] Two transport streams using the same frequency band for transmission is called co-carrier transmission. Or, two transport streams use the same hardware module for transmission, and the frequency band supported by the hardware module is fixed.

[0178] When two transport streams are co-carrier transmitted, for example, a 5G transport stream and a 6G transport stream are co-carrier transmitted. Since the transmission requirements corresponding to each transport stream may be different (such as low latency or coverage), the system parameter sets used are also different, resulting in possible interference between the data of the two transport streams and the demodulation reference signals of each other, affecting the channel estimation performance and the transmission performance deteriorating.

[0179] In view of this, the embodiments of the present application provide a communication method, such that when two transport streams of different systems are co-carrier transmitted, even when using different system parameter sets for data transmission, the DM-RS resources corresponding to the two transport streams can still remain orthogonal, ensuring the channel estimation performance.

[0180] The following will detail the communication method provided by the embodiments of the present application in conjunction with the accompanying drawings. The embodiments provided by the present application can be applied to the Figure 1 communication system shown above, without limitation.

[0181] The following details the solution of the present application.

[0182] Figure 6 It is a schematic flowchart of a communication method 600 provided by the embodiments of the present application. For ease of description below, the method 600 is exemplarily described with the execution subject being a terminal device. It can be understood that the terminal device can be a component of the terminal device (such as a chip or a circuit), without limitation.

[0183] S610, the first terminal device receives the first configuration information.

[0184] The network device sends the first configuration information to the first terminal device. Correspondingly, the first terminal device receives the first configuration information.

[0185] Among them, the first configuration information includes the first system parameters of the first reference signal.

[0186] Among them, the first reference signal is used to demodulate the first downlink data.

[0187] Exemplarily, the first downlink data may be a 6G transport stream.

[0188] Exemplarily, the first reference signal may be DMRS.

[0189] Among them, the first system parameters are different from the second system parameters of the first downlink data.

[0190] Among them, the first system parameters or the second system parameters may include one or more of the following parameters: subcarrier spacing, width of the resource unit, length of the time slot, and length of the symbol.

[0191] It can be understood that the first system parameters are different from the second system parameters. For example, if 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 length of the time slot 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.

[0192] In the embodiments of the present application, the second system parameters may be sent to the first terminal device through the first configuration information, or may be sent to the first terminal device through other configuration information. The embodiments of the present application do not limit this.

[0193] In a possible implementation, the network device sends the second configuration information to the second terminal device. The second configuration information includes the third system parameters of the second reference signal, and the second reference signal is used to demodulate the second downlink data.

[0194] In a possible implementation, the network device sends the second configuration information to the first terminal device. The second configuration information includes the third system parameters of the second reference signal, and the second reference signal is used to demodulate the second downlink data.

[0195] It can be understood that the transport streams of the first downlink data and the second downlink data may be two different transport streams of the same terminal device, or may be two different transport streams of two different devices.

[0196] Exemplarily, the second reference signal may be DMRS. Among them, the system parameters of the second downlink data and the second reference signal are the same, that is, the third system parameters.

[0197] Exemplarily, the third system parameter may include one or more of the following parameters: subcarrier spacing, width of a resource unit, length of a time slot, and length of a symbol.

[0198] Wherein, the time domain resources of the second downlink data are the same as those of the first downlink data, and the transmission streams of the second downlink data and the first downlink data are transmitted on the same carrier.

[0199] The time domain resources of the first reference signal and the second reference signal are the same.

[0200] Wherein, the first downlink data and the second downlink data are downlink data under different radio access technologies.

[0201] Exemplarily, the second downlink data is a 5G transmission stream.

[0202] An alternative understanding is that the first downlink data and the second downlink data are transmission streams sent by a network device to a first terminal device and a 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 (the third system parameter), and the time domain resources of the first reference signal and the second reference signal are the same. Two transmission streams (the first downlink data and the second downlink data) of different radio access technologies can be transmitted on the same carrier.

[0203] It should be noted that the second downlink data and the first downlink data are downlink data of two different transmission streams. These two transmission streams can be transmission streams of different terminal devices, for example, they can be transmission streams of a first terminal device and a second terminal device; they can also be transmission streams of the same terminal device, for example, they can be two transmission streams of a first terminal device. The embodiments of the present application do not limit this.

[0204] See Figure 7 , as an example, Figure 7 shows a schematic diagram of resource allocation for co-carrier transmission of two downlink data applicable to the embodiments of the present application. As Figure 7As shown, the network device sends first downlink data to a first terminal device, and the network device sends second downlink data to a second terminal device. 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 the third system parameter). For example, both are 15 KHz. Among them, the subcarrier spacing of the first downlink data is different from the subcarrier spacing of the first reference signal (the first system parameter and the second system parameter are different). For example, the subcarrier spacing of the first downlink data is 30 KHz, and the subcarrier spacing of the first reference signal is 15 KHz. 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 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 resources. That is to say, no data is transmitted on this time-domain resource, so as to avoid the interference of the data of one transmission stream on the reference signal of another transmission stream, thereby improving the channel estimation performance.

[0205] S620. The first terminal device receives the first reference signal according to the first configuration information.

[0206] The first configuration information includes the first system parameter of the first reference signal. The first terminal device can determine the time-domain unit and the frequency-domain unit for receiving the first reference signal based on the first system parameter, and receive the first reference signal sent by the network device according to the time-domain unit and the frequency-domain unit.

[0207] Exemplarily, the network device sends first downlink data to the first terminal device. The terminal device can determine the time-domain unit and the frequency-domain unit for receiving the first downlink data according to the second system parameter, and receive the first downlink data according to the time-domain unit and the frequency-domain unit.

[0208] The following describes the method for the first terminal device to determine the time-domain unit and the frequency-domain unit for receiving the first reference signal based on the first system parameter.

[0209] In a 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.

[0210] In the embodiment of the present application, the length of the OFDM symbol occupied by the first reference signal and the length of the time slot are determined by the first system parameter. A possible understanding is that 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. Exemplarily, such as Figure 7As shown, the time-domain resources occupied by the first reference signal are the same as those 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.

[0211] In a possible implementation, the first terminal device determines the starting time-domain unit of the first reference signal according to the first system parameter and the second system parameter.

[0212] 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 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, determine the starting time-domain unit of the first reference signal.

[0213] In a possible example, the starting time-domain unit of the first reference signal is the starting OFDM symbol occupied within a time slot.

[0214] Exemplarily, the index x of the starting time-domain unit of the first reference signal n satisfies the following formula (1):

[0215] x n = [(m + 14 * n) * 2^(μ2 - μ1)] mod 14, Formula (1),

[0216] where m is a parameter configured or preset by the network device, n is an integer, the value of μ1 corresponds to the first system parameter, and the value of μ2 corresponds to the second system parameter.

[0217] It should be noted that the values of μ1 and μ2 can be the values in Table 4 above. For example, the value of μ1 can be equal to 0, then the subcarrier spacing in the first system parameter is 15KHZ, and the value of μ2 can be equal to 1, then the subcarrier spacing in the second system parameter is 30KHZ.

[0218] Optionally, in one implementation, n can be equal to 0.

[0219] Exemplarily, the index x of the starting time-domain unit of the first reference signal n can be reflected in tabular form, and this application embodiment does not limit this.

[0220] In a possible implementation, the first reference signal occupies two symbols, that is, the first reference signal is configured as two symbols, and the value of x n is one or more of {1, 8}.

[0221] For example, when μ1 - μ2 = 1, the value of m includes 2, and x nThe value of can be one or more of {1, 8}.

[0222] Exemplarily, when the value of x n includes 1, the value of x n can also include one of {4, 5}; when the value of x n includes 8, the value of x n can also include one of {11, 12}.

[0223] In a possible implementation, considering the additional pilot positions of the first reference signal that occupies two symbols, the value of m can also be one or more of {8, 10}.

[0224] The following uses specific examples to illustrate the value-taking method of x n

[0225] Figure 8 shows the case where μ1 corresponding to the first reference signal system parameters is greater than μ2 corresponding to the first downlink data system parameters.

[0226] Refer to Figure 8 , as an example, Figure 8 shows the time-domain configuration schematic diagram 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, and the SCS used by the first DMRS is 30KHZ. 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 both the second PDSCH and the second DMRS is 50KHZ, and the second DMRS is used to demodulate the second PDSCH. As shown in Figure 8 (a) of , taking the value of m as 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 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.

[0227] Exemplarily, considering the additional pilot positions of the first DMRS and the second DMRS, as shown in Figure 8 (b) of , taking the values of m as 2 and 8, then in order to ensure that the time-domain resources of the first DMRS and the second DMRS are the same, the indexes of the time-domain units occupied by the first DMRS can be 1 and 4. In other words, the indexes of the time-domain units occupied by the first DMRS are 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.

[0228] Exemplarily, consider additional pilot positions that occupy the first DMRS and the second DMRS, as Figure 8 shown in (c) of Figure 8 . Taking the values of m as 2 and 10 as examples, in order to ensure that the time-domain resources of the first DMRS and the second DMRS are the same, the indexes of the time-domain units occupied by the first DMRS can be 1 and 5. In other words, the indexes of the time-domain units occupied by the first DMRS are 1 and 5, and the positions of the time-domain units occupied by the first DMRS are the same as those of the time-domain units occupied by the second DMRS.

[0229] Exemplarily, consider a scenario where the time slot corresponding to a 15KHZ subcarrier corresponds to the time slots corresponding to two 30KHZ subcarriers. In this scenario, data transmissions occur in both the time slot corresponding to a 15KHZ subcarrier and the time slots corresponding to two 30KHZ subcarriers, as Figure 8 shown in (d) of Figure 8 . For the second PDSCH, taking the values of m as 2 and 2 as examples, that is, the second DMRS occupies the time-domain units with indexes 2 in 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 indexes of the time-domain units occupied by the first DMRS in this one time slot can be 1 and 8, corresponding to the time-domain unit with index 2 in the first time slot and the time-domain unit with index 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 positions of the time-domain units occupied by the first DMRS are the same as those of the time-domain units occupied by the second DMRS.

[0230] Exemplarily, consider a scenario where the time slot corresponding to a 15KHZ subcarrier corresponds to the time slots corresponding to two 30KHZ subcarriers. In this scenario, data transmissions occur in both the time slot corresponding to a 15KHZ subcarrier and the time slots corresponding to two 30KHZ subcarriers, as Figure 8 shown in (e) of Figure 8 . For the second PDSCH, taking the values of m as 2, 2, and 10 as examples, that is, the second DMRS occupies the time-domain units with index 3 in two time slots respectively, and there is an additional DMRS on the time-domain unit with index 10 in the second 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 this one time slot can be 1, 8, and 12, corresponding to the time-domain unit with index 2 in the first time slot, the time-domain unit with index 2 in the second time slot, and the time-domain unit with index 10 occupied by the additional DMRS 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, 8, and 12, and the positions of the time-domain units occupied by the first DMRS are the same as those of the time-domain units occupied by the second DMRS.

[0231] Through the above example, when the first PDSCH and the first DMRS use different system parameters, and μ1 corresponding to the first DMRS system parameters is greater than μ2 value corresponding to the first downlink data system parameters, the index of the starting time domain unit occupied by the first DMRS is determined by the above method, and the time domain resources of the first DMRS are the same as those of the second DMRS. Thus, when the first PDSCH and the second PDSCH are transmitted on the same carrier, it is possible to avoid the interference between the DMRSs of one transmission stream and another transmission stream under different communication systems.

[0232] In a possible implementation, the first reference signal occupies two symbols, that is, the first reference signal is configured as a single symbol, and the value of x n is one of {4, 6}.

[0233] For example, when μ2 - μ1 ≤ 2, the values of m include 2 and 3, and the value of x n is one of {4, 6}.

[0234] In a possible implementation, the first reference signal is configured as a single symbol, and the value of m also includes one of {5, 6}.

[0235] In a possible implementation, when μ2 - μ1 = 1, the value of x n also includes one of {10, 12}.

[0236] The following uses specific examples to illustrate the value-taking method of x n

[0237] Figure 9 shows the case where μ1 corresponding to the first reference signal system parameters is less than μ2 corresponding to the first downlink data system parameters.

[0238] See Figure 9 As an example, Figure 9 shows the time domain configuration schematic diagram 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, and the SCS used by the first DMRS is 15KHZ. The first DMRS is used to demodulate the first PDSCH; the second downlink data takes the second PDSCH as an example. The SCSs 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 (a) of Figure 9 , taking the value of m as 3, 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. ​

[0239] Exemplarily, as Figure 9 shown in (b) of, taking the value of m as 2 for example, 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.

[0240] Exemplarily, consider a scenario where a time slot corresponding to a 15KHZ subcarrier and time slots corresponding to two 30KHZ subcarriers are involved. In this scenario, data is transmitted in both the time slot corresponding to a 15KHZ subcarrier and the time slots corresponding to two 30KHZ subcarriers. As Figure 9 shown in (c) of, taking the values of m as 3, 6, and 9 for the second PDSCH, that is, the second DMRS occupies the time-domain units with indexes 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 unit with index 3 and the time-domain unit with index 6 in the second PDSCH respectively. In other words, the indexes of the time-domain units occupied by the first DMRS are 6 and 12, 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.

[0241] Exemplarily, consider a scenario where a time slot corresponding to a 15KHZ and time slots corresponding to two 30KHZ are involved. In this scenario, data is transmitted in both the time slot corresponding to a 15KHZ and the time slots corresponding to two 30KHZ. As Figure 9 shown in (d) of, taking the values of m as 2, 5, 8, and 11 for the second PDSCH, that is, the second DMRS occupies the time-domain units with indexes 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 indexes 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 unit with index 2 and the time-domain unit with index 5 in the second PDSCH respectively. In other words, the indexes of the time-domain units occupied by the first DMRS are 4 and 10, 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.

[0242] Through the above example, when the first PDSCH and the first DMRS use different system parameters, and μ1 corresponding to the first DMRS system parameters is less than the value of μ2 corresponding to the first downlink data system parameters, 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 are the same as those of the second DMRS. Thus, when the first PDSCH and the second PDSCH are transmitted on the same carrier, it is possible to avoid interference between the DMRSs of one transmission stream and another transmission stream under different communication systems.

[0243] In a 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 parameters.

[0244] Exemplarily, the subcarrier spacing of the first reference signal is determined.

[0245] In the embodiments of the present application, the subcarrier spacing of the frequency-domain resources occupied by the first reference signal is determined by the first system parameters.

[0246] In a possible understanding, 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.

[0247] Exemplarily, as Figure 7 shown, 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.

[0248] In a possible implementation, the first terminal device may determine the frequency-domain reference point of the first reference signal.

[0249] 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, and this starting RB is configured by the network device. For example, it is configured through the System Information Block 1 (SIB1) or the synchronization signal and PBCH block (SSB).

[0250] In the embodiments of the present application, the frequency-domain reference point may be configured. For example, the frequency-domain reference point is configured by the third configuration information. It may also be configured by other configuration information. For example, the frequency-domain reference point is configured by the first configuration information. That is, the third configuration information and the first configuration information may be the same configuration information or different configuration information. The embodiments of the present application do not limit this.

[0251] Exemplarily, the first terminal device determines, according to 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.

[0252] See Figure 10 , as an example, Figure 10 shows a pattern schematic diagram of a frequency-domain reference point. The first downlink data is taken as an example of 6G, and the second downlink data is taken as an example of 5G. The network device may configure the frequency-domain reference point of 6G according to the frequency-domain reference point of 5G, so as to ensure that the frequency-domain reference point of 6G is aligned with the frequency-domain reference point of 5G in the frequency domain.

[0253] In a possible implementation, the first terminal device may determine the original sequence of the first reference signal according to the configuration of the network device.

[0254] In the embodiments of the present application, the original sequence may also be referred to as a base sequence or a pseudo-random sequence. The embodiments of the present application do not limit this.

[0255] Exemplarily, the first terminal device determines the original sequence of the first reference signal according to the first parameter, the second parameter configured by the network device, and formula (2).

[0256]

[0257] Wherein, is the number of symbols in a time slot, n SCID is a parameter configured by the network device, is determined by n SCID、port corresponding parameter and the parameter configured by the network device, is determined by the base station configuration parameter and , λ represents the index of the code division multiplexing group corresponding to the port of the first reference signal. Wherein, is the configured first parameter, and l is the configured second parameter.

[0258] 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.

[0259] It can be understood that the above first parameter and / or second parameter can be configured in the first configuration information or can be configured separately. The embodiments of the present application do not limit this.

[0260] Exemplarily, the network device sends system parameter configuration to the first terminal device, and the first terminal device can obtain the corresponding value and the l corresponding value according to the system parameter configuration.

[0261] Exemplarily, the above system parameter configuration includes the system parameters corresponding to the second downlink data, or in other words, the above system parameter configuration includes a time domain configuration information, and the first terminal device can obtain and the l corresponding value based on the time domain configuration information.

[0262] An alternative understanding is that in the above formula, it can be understood as the slot index under the configured second system parameter. In the embodiments of the present application, the first parameter configured by the network device is different from the slot index under the second system parameter, or in other words, the first parameter configured by the network device is the same as the slot index under the third system parameter, so that the original sequences of the first reference signal and the second reference signal can be determined to be the same. Similarly, l can be understood as the index of the OFDM symbol under the configured second system parameter. In the embodiments 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, so that the original sequences of the first reference signal and the second reference signal can be determined to be the same.

[0263] As shown in Table 3 in the previous text, 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 the port). For example, when the number of CDM groups is 1, the difference between the EPRE of the type-1 DMRS and the EPRE of the PDSCH is 0 dB. For another example, when the number of CDM groups is 2, the difference between the EPRE of the type-2 DMRS and the EPRE of the PDSCH is -3 dB.

[0264] In the embodiments of the present application, the difference between the EPRE of the DM-RS and the EPRE of the PDSCH has nothing to do with the number of CDM groups used. Or 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.

[0265] In the embodiments of the present application, from the perspective of the frequency domain configuration method, the DM-RS configuration can be divided into Type 1 configuration and Type 2 configuration.

[0266] Among them, the Type1 configuration and the Type2 configuration indicate two ways of frequency-domain arrangement. For example, Figure 5 , in Type1, the DMRS is arranged with a spacing of one RB in the frequency domain. In Type2, the DMRS occupies two RBs arranged every six RBs in the frequency domain.

[0267] In a possible implementation, the first reference signal is configured as Type 1 (i.e., Type1). The number of code-division multiplexing groups without data transmission is different, 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 the first value.

[0268] Exemplarily, the first value is -3 dB.

[0269] In a possible implementation, the first reference signal is configured as Type 2 (i.e., Type2). The number of code-division multiplexing groups without data transmission is different, 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 the second value.

[0270] Exemplarily, the second value is -4.77 dB.

[0271] 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 manners are equally applicable to uplink data. For example, the first terminal device receives the fourth configuration information, and the first terminal device sends the 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 manners can refer to the above S610 and S620, and will not be elaborated here.

[0272] The present application designs a configuration method for reference signals, enabling the first reference signal and its corresponding first downlink data to use different system parameters. At the same time, for time-domain resource configuration, time-domain start symbol, frequency-domain resource configuration and physical resource mapping, base sequence generation, and EPRE offset design, enabling the resources (including time domain, frequency domain, sequence, etc.) of the first reference signal and the second reference signal and the second reference signal corresponding to the second downlink data to be orthogonal under the same system parameters, so as to avoid interference between the DMRSs of one transmission stream and another transmission stream under different communication systems when two downlink data transmissions occupying the same time-frequency resources.

[0273] The above has Figures 6 to 10 described in detail the method provided by the embodiments of the present application. Next, the Figures 11 to 12 embodiments of the apparatus provided by the embodiments of the present application will be described in detail. It should be understood that the description of the apparatus embodiments corresponds to the description of the method embodiments. Therefore, the content not described in detail can refer to the above method embodiments. For the sake of brevity, it will not be elaborated here.

[0274] The device is used to implement the above-mentioned embodiments and related implementation manners, and those that have been described will not be repeated. As used hereinafter, the term "module" can be a combination of software and / or hardware that can implement a predetermined function. Although the devices described in the following embodiments are implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated.

[0275] Figure 11 It is a schematic structural diagram of a communication device provided by an embodiment of the present application.

[0276] The device 1100 includes a transceiver unit 1110 and a processing unit 1120. Among them, the transceiver unit 1110 can be used to implement corresponding communication functions, and the processing unit 1120 can be used to perform data processing.

[0277] Optionally, the transceiver unit 1110 can also be referred to as a communication interface or a communication unit, and includes a sending unit and / or a receiving unit. The transceiver unit 1110 can be a transceiver (including a transmitter and / or a receiver), an input / output interface (including an input and / or an output interface), a pin, or a circuit, etc. The transceiver unit 1110 can be used to execute the sending and / or receiving steps in the above method embodiments.

[0278] Optionally, the processing unit 1120 can be a processor (which can include one or more), a processing circuit with processor functions, etc., and can be used to execute other steps in the above method embodiments except for sending and receiving.

[0279] Optionally, the device 1100 further includes a storage unit, and the storage unit can be a memory, an internal storage unit (such as a register, a cache, etc.), an external storage unit (such as a read-only memory, a random access memory, etc.), etc. The storage unit is used to store instructions, and the above-mentioned processing unit 1120 executes the instructions stored in the storage unit so that the communication device executes the above method.

[0280] In one design, the device 1100 can be used to perform the actions performed by the terminal device in the above method embodiments. For example, the device 1100 can be used to perform the actions performed by the terminal device in the above method 600. At this time, the device 1100 can 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 on the terminal device in the above method embodiments.

[0281] For example, a transceiver unit 1110 is configured to receive first configuration information, where the first configuration information includes first system parameters of a first reference signal, and the first reference signal is used for demodulating first downlink data, and the first system parameters are different from second system parameters of the first downlink data; a processing unit 1120 is configured to receive the first reference signal according to the first configuration information.

[0282] It should be understood that the transceiver unit 1110 may also perform other operations performed by the terminal device in any of the above methods 600, which will not be elaborated herein one by one.

[0283] In one design, the apparatus 1100 may be used to perform the actions performed by the network device in the above method embodiments. For example, the apparatus 1100 may be used to perform the actions performed by the network device in the above method 600. At this time, the apparatus 1100 may be a component of the terminal device. The transceiver unit 1110 is configured to perform the transceiver-related operations on the network device side in the above method embodiments, and the processing unit 1120 is configured to perform the processing-related operations on the network device in the above method embodiments.

[0284] For example, a transceiver unit 1110 is configured to send first configuration information, where the first configuration information includes first system parameters of a first reference signal, and the first reference signal is used for demodulating first downlink data, and the first system parameters are different from second system parameters of the first downlink data; the transceiver unit 1110 is further configured to send the first reference signal.

[0285] It should be understood that the transceiver unit 1110 and the processing unit 1120 may also perform other operations performed by the network device in any of the above methods 600, which will not be elaborated herein one by one.

[0286] It should also be understood that the apparatus 1100 is embodied in the form of functional units herein. The term "unit" herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor, or a group of processors, etc.) for executing one or more software or firmware programs, a memory, a combined logic circuit, and / or other suitable components that support the described functions. In an alternative example, those skilled in the art may understand that the apparatus 1100 may specifically be the network device in the above embodiments, and may be used to perform the respective processes and / or steps corresponding to the network device in the above method embodiments. To avoid repetition, it will not be elaborated herein.

[0287] The apparatus 1100 in each of the above solutions has the function of implementing the corresponding steps performed by the devices in the above method, or the apparatus 1100 in each of the above solutions has the function of implementing the corresponding steps performed by the access network device in the above method. The function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor to respectively perform the transceiver operations and related processing operations in each method embodiment.

[0288] In addition, the above transceiver unit 1110 can also be a transceiver circuit (for example, it can include a receiving circuit and a sending circuit), and the processing unit can be a processing circuit.

[0289] It should be noted that Figure 11 The apparatus in can be a network element or device in the foregoing embodiments, or a chip or a chip system, for example: a system on chip (SoC). Among them, the transceiver unit can be an input / output circuit or a communication interface; the processing unit is a processor, microprocessor or integrated circuit integrated on the chip. It is not limited here.

[0290] Figure 12 is a schematic diagram of a communication architecture provided by an embodiment of the present application. Figure 12 The shown communication apparatus 1200 includes: a processor 1210, and optionally, one or more of a memory 1220 or a transceiver 1230. The processor 1210 is coupled to the memory 1220 and is configured to execute instructions stored in the memory 1220 to control the transceiver 1230 to send signals and / or receive signals.

[0291] It should be understood that the above processor 1210 and memory 1220 can be integrated into a processing device, and the processor 1210 is configured to execute program code stored in the memory 1220 to implement the above functions. Specifically, the memory 1220 can also be integrated in the processor 1210 or be independent of the processor 1210. It should be understood that the processor 1210 can also correspond to each processing unit in the previous communication apparatus, and the transceiver 1230 can correspond to each receiving unit and sending unit in the previous communication apparatus.

[0292] It should also be understood that the transceiver 1230 can include a receiver (or receiver) and a transmitter (or transmitter). The transceiver can further include antennas, and the number of antennas can be one or more. The transceiver can also be a communication interface or an interface circuit.

[0293] Specifically, the communication device 1200 may correspond to the terminal device in the method 600 according to the embodiments of the present application. The communication device 1200 may execute the steps performed by the terminal device in the method 600; the communication device 1200 may correspond to the network device in the method 600 according to the embodiments of the present application. The communication device 1200 may execute the steps performed by the network device in the method 600. It should be understood that the specific processes of the above corresponding steps have been described in detail in the above method embodiments. For the sake of brevity, they will not be repeated here.

[0294] When the communication device 1200 is a chip, the chip includes an interface unit and a processing unit. Among them, the interface unit may be an input / output circuit or a communication interface; the processing unit may be a processor, a microprocessor, or an integrated circuit integrated on the chip.

[0295] In the implementation process, each step of the above method may be completed by the integrated logic circuit of the hardware in the processor or the instructions in the form of software. The steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed and completed by the hardware processor, or executed and completed by the combination of the hardware and software modules in the processor. The software module may be located in a mature storage medium 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 combines its hardware to complete the steps of the above method. To avoid repetition, it will not be described in detail here.

[0296] It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip with the ability to process signals. In the implementation process, each step of the above method embodiments may be completed by the integrated logic circuit of the hardware in the processor or the instructions in the form of software. The above processor may 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 devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed and completed by the hardware decoding processor, or executed and completed by the combination of the hardware and software modules in the decoding processor. The software module may be located in a mature storage medium 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 combines its hardware to complete the steps of the above method.

[0297] The present application also provides a computer-readable medium, on which a computer program is stored. When the computer program is executed by a computer, it implements the functions of any one of the above method embodiments.

[0298] The present application also provides a computer program product, which implements the functions of any one of the above method embodiments when executed by a computer.

[0299] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from a website, computer, server, or data center to another website, computer, server, or data center in a wired manner (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wirelessly (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more integrated available media. The available medium can be a magnetic medium (such as a floppy disk, hard disk, magnetic tape), an optical medium (such as a high-density digital video disc (DVD)), or a semiconductor medium (such as a solid state disk (SSD)).

[0300] In the embodiments of the present application, words such as "exemplary" and "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary" in the present application should not be construed as being more preferred or having more advantages than other embodiments or designs. Rather, the use of the word "exemplary" is intended to present concepts in a specific manner.

[0301] It should be understood that the "embodiments" mentioned throughout the specification mean that specific features, structures, or characteristics related to the embodiments are included in at least one embodiment of the present application. Therefore, the various embodiments throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner.

[0302] It should be understood that in various embodiments of the present application, the magnitudes of the sequence numbers of the above processes do not imply the order of execution. The order of execution of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application. The names of all nodes and messages in the present application are only names set for the convenience of description in the present application. The names in the actual network may be different. It should not be understood that the present application limits the names of various nodes and messages. On the contrary, any name having the same or similar function as the nodes or messages used in the present application is regarded as the method of the present application or an equivalent replacement, and is within the protection scope of the present application.

[0303] It should also be understood that in the present application, "when", "if", and "in case" all refer to the situation where the UE or the base station will make corresponding processing under certain objective circumstances, rather than limiting the time, and it is not required that the UE or the base station must have a judgment action when implemented, nor does it mean that there are other limitations.

[0304] In addition, the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone.

[0305] The term "at least one of..." or "at least one kind of..." in this article means all or any combination of the listed items. For example, "at least one of A, B, and C" can represent: A exists alone, B exists alone, C exists alone, A and B exist simultaneously, B and C exist simultaneously, and A, B, and C exist simultaneously. The "at least one" in this article means one or more. "Multiple" means two or more.

[0306] It should be understood that the terms "include", "comprise", "have" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0307] It should be understood that in various embodiments of the present application, the first, second, and various numerical numbers are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. For example, to distinguish different information, etc.

[0308] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in this article can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of the present application.

[0309] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes and beneficial effects described in the foregoing method embodiments, and will not be elaborated herein.

[0310] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, 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 displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0311] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0312] In addition, in each embodiment of the present application, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0313] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, part of the technical solution of the present application can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs that can store program codes.

[0314] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims described above.

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 for demodulating 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 are the same as the time domain resources of a second reference signal, the second reference signal being used for demodulating 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 1-3, characterized in that The time domain resources of the first reference signal are the same as the time domain resources of a second reference signal, the second reference signal being used for demodulating 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 a 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 a 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 to 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 a frequency domain unit for receiving the first reference signal according to the first system parameters.

11. The method according to claim 10, characterized in that, The method further includes: Determining a 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 by the network device, is determined by n SCID , the port corresponding parameter and the network device configuration parameter, is determined by the base station configuration parameter and where λ represents the index of the code division multiplexing group corresponding to the port of the first reference signal. Among them, is the configured first parameter, and l is the configured second parameter.

13. The method according to any one of claims 1 to 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 data transmission 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 data transmission 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 for demodulating 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, characterized in that, The method further includes: Transmit second configuration information, where the second configuration information includes third system parameters of a second reference signal for demodulating second downlink data. The system parameters of the second reference signal are the same as those of the second downlink data. The time-frequency resources of the second reference signal are the same as the time domain resources of the first reference signal. The second downlink data is 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. The system parameters of the second reference signal are the same as those of the second downlink data. 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 to 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 first parameter, the second parameter, and the original sequence of the first reference signal satisfy formula (2): Among them, is the number of symbols in a time slot, and n SCID is a parameter configured by the network device. is determined by n SCID , the port corresponding parameter and the network device configuration parameter. is determined by the base station configuration parameter and . λ represents the index of the code division multiplexing group corresponding to the port of the first reference signal. Among them, 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, and the number of code division multiplexing groups without data transmission is different. 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, and the number of code division multiplexing groups without data transmission is different. 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, It 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, It includes a processor coupled to a memory. The memory is used to store computer programs or instructions. The processor is used to execute the computer programs 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 instruction is stored on the computer-readable storage medium. When the computer program or instruction runs on a computer, the method according to any one of claims 1 to 19 is executed.

23. A chip system, characterized in that, It 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 runs on a computer, the method according to any one of claims 1 to 19 is executed.

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