Communication method, apparatus, device, chip, storage medium, product and program

Abstract

This application provides a communication method, apparatus, device, chip, storage medium, product, and program. The method includes: a terminal device sending first information to a network device, wherein the first information is used to indicate a first pilot signal.

Description

Communication method, device, equipment, chip, storage medium, product and program Technical Field

[0001] The present application relates to the field of communication technology, and specifically to a communication method, apparatus, device, chip, storage medium, product and program. Background Art

[0002] In related technologies, pilot signals are generally configured through pre-agreement or through Radio Resource Control (RRC) signaling sent by network equipment, and the configuration method is not flexible enough.

[0003] Summary of the Invention

[0004] The present application provides a communication method, apparatus, device, chip, storage medium, product and program.

[0005] In a first aspect, the communication method provided by the embodiments of the present application includes:

[0006] The terminal device sends first information to the network device, where the first information is used to indicate a first pilot signal.

[0007] In a second aspect, the communication method provided by the embodiments of the present application includes:

[0008] The network device receives first information sent by the terminal device, where the first information is used to indicate a first pilot signal.

[0009] In a third aspect, an embodiment of the present application provides a communication device, which is applied to a terminal device and includes:

[0010] The first sending unit is configured to send first information to the network device, where the first information is used to indicate a first pilot signal.

[0011] In a fourth aspect, an embodiment of the present application provides a communication device, which is applied to a network device and includes:

[0012] The second receiving unit is configured to receive first information sent by the terminal device, where the first information is used to indicate a first pilot signal.

[0013] In a fifth aspect, an embodiment of the present application provides a communication device, comprising a processor and a memory. The memory is configured to store computer-executable instructions, and the processor is connected to the memory and configured to implement the communication method of the first or second aspect by executing the computer-executable instructions.

[0014] In a sixth aspect, the chip provided in an embodiment of the present application is used to implement the communication method of the first aspect or the second aspect mentioned above.

[0015] Specifically, the chip includes: a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes the communication method of the first aspect or the second aspect mentioned above.

[0016] In the seventh aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by at least one processor, implements the communication method of the first aspect or the second aspect mentioned above.

[0017] In an eighth aspect, an embodiment of the present application provides a computer program product, which includes a computer storage medium storing a computer program, and the computer program includes instructions that can be executed by at least one processor, and when the instructions are executed by at least one processor, the communication method of the first or second aspect above is implemented.

[0018] In the ninth aspect, the computer program provided in the embodiment of the present application, when running on a computer, enables the computer to execute the communication method of the first aspect or the second aspect mentioned above.

[0019] An embodiment of the present application provides a communication method in which a terminal device can send first information to a network device, and the network device can receive the first information sent by the terminal device, wherein the first information indicates a first pilot signal. In other words, the terminal device can indicate a selected first pilot signal to the network device via the first information. In this way, the network device can determine a pilot signal suitable for the terminal device based on the first information, and then communicate with the terminal device based on the pilot signal, thereby improving transmission performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] FIG1 is a schematic diagram of a communication architecture;

[0022] FIG2A is a schematic diagram of a scenario 1 of a demodulation reference signal of one symbol;

[0023] FIG2B is a schematic diagram of a scenario 1 of a demodulation reference signal with two symbols;

[0024] FIG3A is a second schematic diagram of a scenario of a demodulation reference signal of one symbol;

[0025] FIG3B is a schematic diagram of a second scenario of a demodulation reference signal with two symbols;

[0026] FIG4 is a flow chart of a communication method according to an embodiment of the present application;

[0027] FIG5 is a schematic diagram of a scenario of time-frequency resources for transmitting pilot signals and data signals provided in an embodiment of the present application;

[0028] FIG6 is a second schematic diagram of a scenario of time-frequency resources for transmitting pilot signals and data signals provided by an embodiment of the present application;

[0029] FIG7 is a second flow chart of a communication method provided in an embodiment of the present application;

[0030] FIG8 is a schematic diagram of a scenario 1 of a frequency domain position of a pilot signal occupying time-frequency resources provided by an embodiment of the present application;

[0031] FIG9 is a second schematic diagram of a scenario of a frequency domain position of a pilot signal occupying time-frequency resources provided by an embodiment of the present application;

[0032] FIG10A is a third flow chart of a communication method provided in an embodiment of the present application;

[0033] FIG10B is a fourth flow chart of a communication method provided in an embodiment of the present application;

[0034] FIG10C is a fifth flow chart of a communication method provided in an embodiment of the present application;

[0035] FIG10D is a sixth flow chart of a communication method provided in an embodiment of the present application;

[0036] FIG11 is a schematic diagram of the structure of a communication device 1100 provided in an embodiment of the present application;

[0037] FIG12 is a schematic diagram of the structure of a communication device 1200 provided in an embodiment of the present application;

[0038] FIG13 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0039] FIG14 is a schematic structural diagram of a chip provided in an embodiment of the present application;

[0040] FIG15 is a schematic block diagram of a communication system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The following will describe the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] FIG1 is a schematic diagram of a communication architecture.

[0043] As shown in Figure 1, a communication system 100 may include a terminal device 110 and a network device 120. The network device 120 may communicate with the terminal device 110 via an air interface. The terminal device 110 and the network device 120 support multi-service transmission.

[0044] It should be understood that the embodiments of the present application are only illustrative of the communication system 100, but the embodiments of the present application are not limited thereto. That is, the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Internet of Things (IoT) system, Narrow Band Internet of Things (NB-IoT) system, enhanced Machine-Type Communications (eMTC) system, 5G communication system (also known as New Radio (NR) communication system), or future communication systems.

[0045] In the communication system 100 shown in Figure 1, the network device 120 may be an access network device that communicates with the terminal device 110. The access network device may provide communication coverage for a specific geographical area and may communicate with the terminal device 110 located within the coverage area.

[0046] The network device 120 may be an evolved Node B (eNB or eNodeB) in an LTE system, or a Next Generation Radio Access Network (NG RAN) device, or a base station (gNB) in an NR system, or a wireless controller in a Cloud Radio Access Network (CRAN), or the network device 120 may be a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future evolved Public Land Mobile Network (PLMN), etc.

[0047] The terminal device 110 may be any terminal device, including but not limited to a terminal device connected to the network device 120 or other terminal devices by wire or wireless connection.

[0048] For example, the terminal device 110 may refer to an access terminal, user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user apparatus. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, an IoT device, a satellite handheld terminal, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolution network, etc.

[0049] The terminal device 110 can be used for device-to-device (D2D) communication.

[0050] FIG1 exemplarily shows a network device and two terminal devices. It should be understood that the communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within its coverage area, which is not limited in this embodiment of the present application.

[0051] It should be noted that FIG1 is only an example of a system to which this application is applicable. Of course, the method shown in the embodiment of this application can also be applied to other systems. In addition, the terms "system" and "network" are often used interchangeably in this article.

[0052] It should be understood that the term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0053] It should also be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B.

[0054] It should also be understood that the "correspondence" mentioned in the embodiments of the present application may indicate a direct or indirect correspondence between the two, or an association between the two, or a relationship between indication and being indicated, configuration and being configured, etc.

[0055] It should also be understood that the “predefined” or “predefined rules” mentioned in the embodiments of the present application can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices), and the present application does not limit its specific implementation method. For example, predefined can refer to what is defined in the protocol. It should also be understood that in the embodiments of the present application, the “protocol” may refer to a standard protocol in the field of communications, for example, it may include LTE protocols, NR protocols, and related protocols used in future communication systems, and the present application does not limit this.

[0056] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following relevant technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application.

[0057] In related technologies, the basic workflow of a wireless communication system may include the following steps:

[0058] At the transmitting end, the bit stream information to be transmitted is channel coded to obtain the coded bit information; the coded bit information is modulated to obtain the modulation symbol; the modulation symbol and the demodulation reference signal (DMRS) are inserted into the corresponding time-frequency resources, and then after subsequent processing, the orthogonal frequency division multiplexing (OFDM) symbol, or the single-carrier frequency division multiple access (SC-FDMA) symbol, or other forms of multi-subcarrier symbols can be obtained.

[0059] It should be noted that the above process is described using OFDM and SC-FDMA systems as examples, and is also applicable to other systems.

[0060] Exemplarily, in the process of modulating the encoded bits to obtain modulation symbols, one or more of the following may be used: binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), 16 quadrature amplitude modulation (QAM), 64QAM, 256QAM, 512QAM, 1024QAM, 2048QAM, and 4096QAM.

[0061] Exemplarily, the modulation symbols and DMRS signals are inserted into corresponding resource elements (RE).

[0062] At the receiving end, the receiver measures the DMRS signal channel estimation, demodulates the modulated symbols, and performs channel decoding to obtain the bit information transmitted by the sending end.

[0063] It should be understood that the above steps can be combined and iterated, and the above order does not necessarily have to be strictly followed. For example, the information obtained by decoding can be used for channel estimation and / or for modulation symbol demodulation.

[0064] It should be noted that the basic working process of the wireless communication system is similar regardless of downlink transmission (DL transmission), uplink transmission (UL transmission) or sidelink transmission (SL transmission).

[0065] Exemplarily, downlink transmission may be transmission from a network device to a terminal device, uplink transmission may be transmission from a terminal device to a network device, and sidelink transmission may be transmission between terminal devices.

[0066] It should also be noted that in order to obtain the bit information transmitted by the transmitting end, the receiving end needs to use the DMRS signal.

[0067] Due to the complexity and time-varying nature of wireless channel environments, the receiver's estimation and recovery of wireless channels directly impacts the ultimate data recovery performance. In traditional communication systems, for control channels (i.e., channels that transmit control information), DMRS signals are relatively fixed. That is, the density and / or pattern of DMRS signals do not need to change dynamically. In this case, the design of DMRS signals is relatively conservative, adapting to various wireless channel environments. In wireless communication systems, for data channels (i.e., channels that transmit data), different DMRS signal densities and / or patterns are often designed to reduce DMRS signal overhead, allowing the DMRS signal to be configured or indicated based on the current wireless channel environment.

[0068] The following is a brief introduction using the data DMRS signal in the NR communication system as an example.

[0069] In the NR communication system, DMRS signals can be divided into front-loaded DMRS signals (also known as front-loaded DMRS signals) and post-loaded DMRS signals (also known as additional DMRS signals).

[0070] For example, for high-speed UEs, in order to improve the channel estimation performance, some DMRS signals are added on the basis of the front DMRS signal. For example, the high-speed UE can send an additional DMRS signal at a certain position in the rear part of the allocated time domain resources, so as to obtain the rear DMRS signal.

[0071] It should be noted that the pre-DMRS signal is usually located in the first few OFDM symbols of the time slot, and the post-DMRS signal pattern is a repetition of the pre-DMRS signal (for example, using the same frequency domain resources and the same number of OFDM symbols) to ensure performance in high-speed scenarios. The pre-DMRS signal can contain one or two OFDM symbols, which is configured by the network equipment.

[0072] It should also be noted that NR can support two different DMRS signal types, Type 1 and Type 2. Different types of DMRS signals occupy resources in different ways. The following uses an example where a small grid represents one RE, 12 subcarriers in the frequency domain resources form one resource block (RB), and 7 symbols in the time domain resources, and combines Figures 2A to 3B to illustrate the two different DMRS signal types.

[0073] As shown in Figures 2A and 2B, two code division multiplexing (CDM) groups can be supported on one symbol (e.g., OFDM symbol) of each physical resource block (PRB), and each CDM group includes 6 subcarriers; wherein the first CDM group is carried by the first type of RE, and the second CDM group is carried by the second type of RE. Each CDM group can support two ports, and the two ports are orthogonalized by an orthogonal cover code (OCC). That is, the OCC code used by one port is [+1 +1 +1 +1 +1 +1], and the OCC code used by the other port is [+1 -1 +1 -1 +1 -1].

[0074] Exemplarily, as shown in FIG2A , a maximum of four orthogonal ports can be supported on one symbol.

[0075] For example, as shown in FIG2B , a maximum of eight orthogonal ports can be supported on two symbols, and a time domain orthogonal cover code (TD-OCC) can be used between the two symbols. For example, the first CDM group of the first symbol includes ports {1000, 1001}, and the second CDM group of the first symbol includes ports {1002, 1003}; the first CDM group of the second symbol includes ports {1004, 1005}, and the second CDM group of the second symbol includes ports {1006, 1007}.

[0076] As shown in Figures 3A and 3B, three CDM groups can be supported on one symbol in each PRB. Each CDM group contains four adjacent subcarriers. The first CDM group is carried by the first type of REs, the second by the second type of REs, and the third by the third type of REs. Each CDM group can support two ports, and the two ports are orthogonalized by OCC. That is, the OCC code used by one port is [+1 +1 +1 +1], and the OCC code used by the other port is [+1 -1 +1 -1].

[0077] Exemplarily, as shown in FIG3A , a maximum of 6 orthogonal ports can be supported on one symbol.

[0078] For example, as shown in FIG3B , a maximum of 12 orthogonal ports can be supported on two symbols, and TD-OCC is used between the two symbols. For example, the first CDM group of the first symbol includes ports {1000, 1001}, the second CDM group of the first symbol includes ports {1002, 1003}, and the third CDM group of the first symbol includes ports {1004, 1005}; the first CDM group of the second symbol includes ports {1006, 1007}, the second CDM group of the second symbol includes ports {1008, 1009}, and the third CDM group of the second symbol includes ports {1010, 1011}.

[0079] In the embodiments of the present application, RE, RB and symbols are mentioned many times. RE, RB and symbols are briefly described below.

[0080] RE: The smallest time-frequency resource unit in a wireless communication system. For example, in NR or LTE systems, one RE in the frequency domain corresponds to one subcarrier, and one RE in the time domain corresponds to one symbol.

[0081] RB: can be for K consecutive subcarriers in the frequency domain. In addition, in some systems, RB can also be for K consecutive subcarriers in the frequency domain and for M consecutive symbols in the time domain.

[0082] Exemplarily, the value of K may be one or more of 8, 12, and 16, or other values, which is not limited in the embodiments of the present application.

[0083] Exemplarily, the value of M can be one or more of 6, 7, 13, and 14, or other values, which is not limited in the embodiments of the present application.

[0084] It should be noted that in the embodiment of the present application, no distinction is made between RB and PRB, and the RB and PRB in the embodiment of the present application are collectively referred to as PRB.

[0085] Symbol: The symbol in the embodiment of the present application can be an OFDM symbol, an SC-FDMA symbol, or other forms of multi-subcarrier symbols, which is not limited in the embodiment of the present application.

[0086] It should be noted that the SC-FDMA symbol can also be called a discrete Fourier transform-spread orthogonal frequency division multiplexing (DFT-SOFDM) symbol, or the SC-FDMA symbol can also be called a multi-carrier symbol using a transform precoder (Transform Precoder), or the SC-FDMA symbol can also be called an OFDM symbol using a transform precoder.

[0087] In related technologies, pilot signals and data signals occupy different time-frequency resources. The pilot signals and data signals are placed orthogonally on the time-frequency resources, and there is no overlap between the pilot signals and the data signals. In other words, a pilot signal or a data signal can be placed on the same time-frequency resource, but not both. However, when the total time-frequency resources are fixed and the terminal device is moving at a high speed, in order to improve channel estimation performance, the pilot signal is often required to occupy more time-frequency resources, resulting in a reduction in the time-frequency resources occupied by the data signal, thereby reducing the data signal transmission rate and transmission reliability.

[0088] It should be noted that in a Code Division Multiple Access (CDMA) system, although the pilot signal and the data signal can be sent on the same time-frequency resource, both the pilot signal and the data signal need to undergo additional spread spectrum processing. For example, the pilot signal and the data signal need to use different orthogonal codes to distinguish them. The embodiments of the present application are mainly applied to OFDM systems / SC-FDMA systems, as well as other systems based on multiple subcarriers. The modulation symbols of the data signal (such as QPSK, 16QAM, etc.) and the modulation symbols of the demodulated pilot signal are directly transmitted on the same time-frequency resource, and the pilot signal and the data signal do not need to undergo additional spread spectrum processing.

[0089] In addition, in the related art, the pilot signal is usually configured by pre-agreement (for example, protocol agreement, and / or broadcast channel notification) or by RRC signaling sent by the network device. For example, in the NR system, when the terminal device performs initial access, the pilot signal used may be determined by protocol agreement and / or broadcast channel notification. The terminal device uses this pilot signal when receiving system messages, random access procedures, and subsequent transmissions. The configuration of the new pilot signal can only be obtained from the RRC signaling when the terminal device enters the RRC connection state, or after entering the RRC connection state.

[0090] However, the configuration flexibility is poor using a pre-agreed method, a broadcast channel notification method, or an RRC configuration method. This is because the pre-determined method or the broadcast channel notification method often needs to take into account all possible terminal devices in the cell, which will result in the pilot signal configuration being suboptimal for some specific terminal devices. Updating the pilot signal configuration through RRC signaling will make it impossible for some terminal devices to use the pilot signal configuration optimized for themselves before entering the RRC connection state. For example, for high-speed mobile terminal devices, more Additional DMRS signals need to be configured to obtain good performance; and for terminal devices that support orthogonal placement of pilot signals and data signals, the network device can adopt an optimized pilot signal configuration scheme before RRC signaling to improve the utilization of time-frequency resources.

[0091] Based on this, an embodiment of the present application provides a communication method, in which a terminal device can send a first information to a network device, and accordingly, the network device can receive the first information sent by the terminal device, wherein the first information is used to indicate a first pilot signal. That is, the terminal device can indicate the selected first pilot signal to the network device through the first information. In this way, the network device can determine a pilot signal suitable for the terminal device based on the first information (for example, the pilot signal may be the first pilot signal, or it may be a pilot signal selected by the network based on the first pilot signal recommended by the terminal device and other considerations), thereby communicating with the terminal device based on the pilot signal and improving transmission performance.

[0092] To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined arbitrarily with the technical solutions of the embodiments of the present application as optional solutions, and all of them fall within the scope of protection of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0093] FIG4 is a flow chart of a communication method provided in an embodiment of the present application. As shown in FIG4 , the method may include the following steps.

[0094] S410. The terminal device sends first information to the network device, where the first information is used to indicate a first pilot signal.

[0095] Accordingly, the network device can receive the first information sent by the terminal device.

[0096] It should be noted that the terminal device and / or network device may pre-define multiple pilot signals. The first pilot signal may be any one of the multiple pilot signals. The pre-definement here may be pre-definement according to a protocol and / or pre-definement by the network device via a broadcast message / system message, and this embodiment of the present application does not impose any limitation on this.

[0097] It should also be noted that in the embodiment of the present application, a typical example of a pilot signal is a DMRS signal, and it can also be a channel state information reference signal (CSI-RS), a phase tracking reference signal (PT-RS), etc., which is not limited to the embodiment of the present application.

[0098] In some embodiments, the first pilot signal may be related to one or more of the following:

[0099] The types of pilot signals supported by the terminal device;

[0100] The speed of the terminal device;

[0101] The wireless channel environment between the terminal device and the network device.

[0102] In one possible implementation, the first pilot signal may be related to a type of pilot signal supported by the terminal device. It is understood that the first pilot signal may be determined based on the type of pilot signal supported by the terminal device. In other words, the terminal device may select a matching first pilot signal from a plurality of predefined pilot signals based on the type of pilot signal supported.

[0103] In some embodiments, the types of pilot signals may include first-type pilot signals and second-type pilot signals, wherein the first pilot signal may be a first-type pilot signal or a second-type pilot signal.

[0104] The first type of pilot signal refers to a pilot signal that occupies time-frequency resources not used to transmit data signals. It is understood that the REs used for the first type of pilot signal do not overlap with the REs used for the data signal. In other words, the first type of pilot signal and the data signal are orthogonal in terms of time-frequency resources. In this embodiment of the present application, the first type of pilot signal may also be referred to as an "orthogonal pilot signal" or "orthogonal DMRS."

[0105] It should be noted that the data signal mentioned in the embodiments of the present application, unless otherwise specified (for example, specifically referring to a data channel), can be data that needs to be transmitted (for example, data passed from the upper layer to the physical layer, service data, etc.), or control information (for example, physical layer downlink control information, physical layer uplink control information, etc.), and the embodiments of the present application do not limit this.

[0106] Exemplarily, data signals (including control information) may be transmitted through one or more of the following channels: physical downlink shared channel (PDSCH), physical uplink shared channel (PUSCH), physical sidelink shared channel (PSSCH), physical downlink control channel (PDCCH), physical uplink control channel (PUCCH), physical sidelink control channel (PSCCH), physical sidelink feedback channel (PSFCH), etc., which is not limited in the embodiments of the present application.

[0107] In addition, the second type of pilot signal refers to a pilot signal in which at least part of the occupied time-frequency resources is used to transmit a data signal.

[0108] It should be noted that at least part of the time-frequency resources can be one time-frequency resource, multiple time-frequency resources (not all time-frequency resources), or all time-frequency resources. This embodiment of the present application does not limit this.

[0109] It should also be noted that at least part of the time-frequency resources occupied by the second-type pilot signal is used to transmit data signals. It can be understood that one or more or all of the time-frequency resources occupied by the first pilot signal are also the time-frequency resources occupied by the data signal. That is, one or more or all of the time-frequency resources used by the second-type pilot signal are also used for data signal transmission at the same time, that is, one or more or all of the time-frequency resources used by the second-type pilot signal and the time-frequency resources used by the data signal can overlap. In order to simplify the description, at least part of the time-frequency resources can be referred to as shared time-frequency resources (Shared RE). In the embodiment of the present application, the second-type pilot signal can also be referred to as "non-orthogonal pilot signal" or "non-orthogonal DMRS".

[0110] For example, taking PDSCH transmission as an example, it is assumed that 8 symbols scheduled by the network device are used on the time domain resources and 12 subcarriers (i.e., 96 REs) are used on the frequency domain resources for the transmission of data signals. As shown in Figure 5, all REs can be used for the transmission of the first pilot signal and the data signal; as shown in Figure 6, the REs corresponding to the 0th, 2nd, 4th, 6th, 8th, and 10th subcarriers on the 0th symbol can be used for the transmission of the first pilot signal and the data signal, and other REs can be used for the transmission of the data signal. It should be noted that RE can be used for the transmission of the first pilot signal and the data signal means that RE can be used for the transmission of the first pilot signal and the data signal at the same time. Similar descriptions in subsequent sections all have this meaning.

[0111] It is understandable that different terminal devices have different signal processing capabilities. Therefore, different terminal devices support different types of pilot signals. For example, for the second type of pilot signal, since the time-frequency resources used can be used to transmit data signals, a specific receiver (such as an iterative receiver, AI / ML receiver) is required to process it so as to demodulate the data. For a terminal device with an ordinary receiver, it can support the first type of pilot signal; for a terminal device with an iterative receiver or an AI / ML receiver, it can support both the first type of pilot signal and the second type of pilot signal.

[0112] It should be noted that AI / ML receivers can employ various methods, such as deep learning algorithms. They can be implemented using one or a combination of fully connected network (FCN), convolutional neural network (CNN), recurrent neural network (RNN), and transformer neural network architectures. The above receivers are merely examples; actual receivers are not limited to these examples.

[0113] In an embodiment of the present application, a terminal device may select a matching first pilot signal from a plurality of predefined pilot signals based on the type of pilot signals supported. For example, if the terminal device supports a first type of pilot signal, the terminal device may select a first type of pilot signal from a plurality of predefined pilot signals as the first pilot signal. If the terminal device supports a second type of pilot signal, the terminal device may select a second type of pilot signal from a plurality of predefined pilot signals as the first pilot signal. If the terminal device supports both a first type of pilot signal and a second type of pilot signal, the terminal device may select either a first type of pilot signal or a second type of pilot signal from a plurality of predefined pilot signals as the first pilot signal.

[0114] In another possible implementation, the first pilot signal may be related to the speed of the terminal device. In other words, the first pilot signal may be determined based on the speed of the terminal device. Specifically, the terminal device may select an appropriate pilot signal from a plurality of predefined pilot signals based on the current mobile speed as the first pilot signal.

[0115] For example, for a high-speed mobile terminal device, more Additional DMRSs may be configured as the first pilot signal to improve communication performance. For a low-speed mobile terminal device, no or fewer Additional DMRSs may be configured as the first pilot signal.

[0116] In another possible implementation, the first pilot signal may be related to the wireless channel environment between the terminal device and the network device. In other words, the first pilot signal may be determined based on the wireless channel environment between the terminal device and the network device. Specifically, the terminal device may select an appropriate pilot signal from a plurality of predefined pilot signals based on the wireless channel environment between the terminal device and the network device as the first pilot signal.

[0117] For example, the terminal device may measure signals from the network device (e.g., synchronization signal blocks (SSBs) and system messages) and estimate the wireless channel environment between the terminal device and the network device based on the signal measurement results (e.g., reference signal received power (RSRP) and signal-to-interference-plus-noise ratio (SINR). In this way, the terminal device may select the most suitable pilot signal as the first pilot signal based on different wireless channel environments.

[0118] It should be noted that the terminal device may also determine the first pilot signal in combination with the type of pilot signal supported by the terminal device and the speed of the terminal device. Exemplarily, for a terminal device that supports the first type of pilot signal and moves at high speed, the first type of pilot signal configured with more Additional DMRS may be selected. Exemplarily, for a terminal device that supports the second type of pilot signal and moves at high speed, the second type of pilot signal may be selected to be transmitted on part or all of the REs that transmit data. Alternatively, the terminal device may determine the first pilot signal in combination with the type of pilot signal supported and the wireless channel environment between the terminal device and the network device. Alternatively, the terminal device may determine the first pilot signal based on the speed and the wireless channel environment between the terminal device and the network device. Alternatively, the terminal device may determine the first pilot signal based on the type of pilot signal supported, the speed of the terminal device, and the wireless channel environment between the terminal device and the network device.

[0119] It can be understood that the first pilot signal indicated by the first information may be a first-type pilot signal or a second-type pilot signal.

[0120] When the first pilot signal is a first-type pilot signal, the network continues to use orthogonal pilot signals in related technologies for communication, avoiding the introduction of new pilot signals and reducing system complexity. When the first pilot signal is a second-type pilot signal, the network can use the same time-frequency resources as the data signal for transmission, allowing the data signal to use more time-frequency resources, increasing transmission rate or improving transmission reliability.

[0121] In the embodiment of the present application, the first information indicates the first pilot signal, which can be understood as the terminal device providing a suggestion to the network device to use the first pilot signal through the first information.

[0122] In one implementation, the network device may agree to use the first pilot signal based on a suggestion provided by the first information; in this way, the terminal device and the network device may communicate based on the first pilot signal.

[0123] In another implementation, the network device may overturn the suggestion of the terminal device in the first information, or modify the suggestion provided by the first information. For example, the network device may select a pilot signal (such as a second pilot signal) on its own based on the first pilot signal suggested by the terminal device and other considerations (such as joint scheduling and coexistence with other terminal devices), from the perspective of the entire system, and indicate the second pilot signal to the terminal device. In this way, the terminal device and the network device can communicate based on the second pilot signal.

[0124] It should be noted that some or all parameters of the second pilot signal are different from those of the first pilot signal.

[0125] Through this method, the terminal device can indicate the selected first pilot signal to the network device via the first information. In this way, the network device can determine a pilot signal (such as the first pilot signal or the second pilot signal) suitable for the terminal device based on the first information, and thus communicate with the terminal device based on the pilot signal, thereby improving transmission performance.

[0126] In one embodiment of the present application, the first pilot signal may be used for one or more of the following channels:

[0127] Downlink data channel;

[0128] Downlink control channel;

[0129] an uplink data channel; and

[0130] Uplink control channel.

[0131] It is understandable that the first pilot signal may be a pilot signal used in one or more of a downlink data channel, a downlink control channel, an uplink data channel, and an uplink control channel. The downlink data channel, downlink control channel, uplink data channel, and uplink control channel herein may be channels transmitted between the terminal device and the network device after transmitting the first information.

[0132] Exemplarily, the first pilot signal may be a DMRS for subsequent downlink control channel transmission (e.g., a DMRS in a PDCCH), or a DMRS for subsequent downlink data channel transmission (e.g., a DMRS in a PDSCH), or a DMRS for subsequent downlink data channel transmission and a DMRS for subsequent downlink control channel transmission (e.g., a DMRS in a PDSCH and a DMRS in a PDCCH). Here, "subsequent" refers to partial transmission or full transmission at a later time or after certain times. The "subsequent" in other examples is similar.

[0133] Exemplarily, the first pilot signal may be a DMRS for subsequent uplink control channel transmission (e.g., a DMRS in a PUCCH), or a DMRS for subsequent uplink data channel transmission (e.g., a DMRS in a PUSCH), or a DMRS for subsequent uplink data channel transmission and a DMRS for subsequent uplink control channel transmission (e.g., a DMRS in a PUSCH and a DMRS in a PUCCH).

[0134] Exemplarily, the first pilot signal may be a DMRS for subsequent downlink and uplink control channel transmissions (e.g., DMRS in PDCCH and DMRS in PUCCH), or, may be a DMRS for subsequent downlink and uplink data channel transmissions (e.g., DMRS in PDSCH and DMRS in PUSCH), or, may be a DMRS for subsequent downlink and uplink data channel transmissions and a DMRS for subsequent downlink and uplink control channel transmissions (e.g., DMRS in PDSCH, DMRS in PUSCH, DMRS in PDCCH and DMRS in PUCCH).

[0135] It should be noted that the channel or channels to which the first pilot signal is specifically directed may be determined by a pre-defined rule or may be indicated by signaling between the terminal device and the network device. This embodiment of the present application does not impose any restrictions on this.

[0136] Exemplarily, the terminal device may indicate to the network device, through the first information, the channel for which the first pilot signal is specifically intended. That is, when the terminal device indicates the first pilot signal to the network device, it may also indicate the channel for which the first pilot signal is specifically intended. For example, the first information may include one or more indication fields, with different values ​​in the indication fields used to indicate which channel or channels the first pilot signal is specifically intended for.

[0137] Illustratively, the network device may indicate to the terminal device, via the seventh information, the channel for which the first pilot signal is specifically intended. In other words, the network device may also indicate to the terminal device the channel for which the first pilot signal is specifically intended. For example, the seventh information may include one or more indication fields, with different values ​​in the indication fields indicating the channel or channels for which the first pilot signal is specifically intended.

[0138] By using this method, the first pilot signal can be indicated for different channels. In this way, different channels can be distinguished and the best pilot signal can be selected for each channel, thereby improving the performance of each channel.

[0139] In one embodiment of the present application, the first information may indicate the first pilot signal in a variety of ways, three of which are described below using Ways #A to #C.

[0140] Mode #A: The first information is transmitted via a first random access signal; wherein the first random access signal is associated with a pilot signal; and the first pilot signal is a pilot signal associated with the first random access signal.

[0141] It should be noted that the terminal device and the network device may agree on multiple groups of random access signals, where different groups of random access signals may be associated with different pilot signals. Thus, after determining the first pilot signal, the terminal device may send the first random access signal from a group of random access signals associated with the first pilot signal to the network device, implicitly indicating the first pilot signal through the first random access signal.

[0142] It should be noted that each group of random access signals in the multiple groups of random access signals may include one or more random access signals. The "group" here is used to describe one or more random access signals with the same role or function, and it is not necessary to explicitly configure a group. For example, one or more random access signals associated with the same pilot signal are called a group. If the one or more random access signals are configured, then we simply refer to a group of random access signals as configured, but this does not mean that a "group" is defined in the configuration signaling. For the sake of convenience of description, sometimes "a group of random access signals" is referred to as "a random access signal group", "multiple groups of random access signals" are referred to as "multiple random access signal groups", and "each group of random access signals" is referred to as "each access signal group". Other similar descriptions are not listed one by one.

[0143] In some embodiments, referring to the second flow chart of the communication method shown in FIG7 , before the terminal device sends the first information at S110 , the communication method provided in the embodiment of the present application further includes the following steps:

[0144] S100: The network device sends second information to the terminal device. Correspondingly, the terminal device receives the second information sent by the network device.

[0145] The second information is used to configure multiple groups of random access signals; different groups of random access signals in the multiple groups of random access signals are associated with different pilot signals; and the first random access signal is any one of a group of random access signals in the multiple groups of random access signals associated with the first pilot signal.

[0146] It is understandable that the network device can agree with the terminal device on multiple groups of different random access signals through the second information.

[0147] It should be noted that the second information does not necessarily have to clearly define or indicate a "group". Similar to the description in the previous article, the "group" here is used to describe one or more random access signals with the same role or function.

[0148] In some embodiments, the second information may be carried by one or more of the following signaling:

[0149] Broadcast messages;

[0150] System messages;

[0151] Dedicated signaling; and,

[0152] RRC signaling.

[0153] Exemplarily, the broadcast message may be a Master Information Block (MIB) message, a Synchronization Signal / PBCH Block (SSB), etc., and is not limited in comparison to the embodiments of the present application.

[0154] Exemplarily, the system message may be a system information block (SIB), such as SIB1, SIB2, etc., which is not limited in the embodiments of the present application.

[0155] Exemplarily, dedicated signaling may be signaling dedicated to a specific function, such as signaling dedicated to configuring an artificial intelligence (AI) / machine learning (ML) model, etc., and the embodiments of the present application do not limit this.

[0156] Exemplarily, for dual connectivity and / or carrier aggregation (CA) scenarios, the second information may also be carried through RRC signaling.

[0157] In a possible implementation, the second information may be carried by a signaling, for example, the second information may be carried by MIB, or by RRC signaling, or by SIB1.

[0158] In another possible implementation, the second information may be carried via multiple signalings. The multiple signalings may be of the same type. For example, the second information may be carried via multiple MIBs, meaning that different information in the second information is carried via different MIBs. Furthermore, the multiple signalings may be of different types, and the second information may be carried via the MIB and SIB1, meaning that part of the second information may be carried via the MIB and part via the SIB1.

[0159] It should be noted that the multiple groups of random access signals configured by the second information may include two or more groups of random access signals.

[0160] It should also be noted that the network device configures two or more groups of random access signals for the terminal device in advance through the second information. It can be understood that the network device indicates the configuration of two or more groups of different random access signals to the terminal device through the second information.

[0161] In one example, the network device indicates the configuration of two or more groups of random access signals, which may mean that the network device indicates the configuration of two or more groups of different random access signals for each synchronization signal in one or more synchronization signals. It can be understood that in the communication system, for each synchronization signal (such as SSB in 5G), there is a corresponding random access signal configuration. Taking synchronization signal A as an example, its corresponding random access signal is A_RACH. In an embodiment of the present application, for synchronization signal A, two groups of different random access signals can be configured, which are recorded as RACH_Set1 and RACH_Set2. That is, the RACH signals corresponding to RACH_Set1 and RACH_Set2 both belong to A_RACH, that is, they are both associated with synchronization signal A. In addition, the random access signal groups RACH_Set1 and RACH_Set2 can be associated with two different DMRSs respectively.

[0162] In another example, the network device indicating the configuration of two or more groups of random access signals may mean that the network device indicates different groups of random access signals for two or more synchronization signals. Taking two synchronization signals as an example (respectively denoted as A and B), the network device may indicate a group of random access signals RACH_SetA for synchronization signal A and a group of random access signals RACH_SetA for synchronization signal B, where the two different groups of random access signals correspond to different DMRSs.

[0163] It should be noted that the random access signal may include a random access channel (RACH) preamble, and the RACH preamble may also be called an RA preamble.

[0164] In some embodiments, different groups of random access signals maintain different configurations with respect to one or more of the following parameters:

[0165] signal sequence;

[0166] signal root sequence;

[0167] generating parameters used by the signal sequence;

[0168] Time domain resources;

[0169] Frequency domain resources;

[0170] RACH occasion;

[0171] preamble; and,

[0172] preamble format.

[0173] It is understandable that the network device can configure different groups of random access signals by configuring different parameters. Differently configured random access signal groups can be associated with different pilot signals. For example, two different RACH occasions can correspond to different pilot signals.

[0174] It should be noted that the relevant configuration parameters of the pilot signals respectively associated with the multiple groups of random access signals configured in the second information may be pre-defined or indicated by the network device.

[0175] In some embodiments, the network device may indicate, through the second information, configuration parameters related to pilot signals respectively associated with multiple groups of random access signals.

[0176] In some embodiments, taking the first pilot signal associated with the first random access signal as an example, the second information may indicate one or more of the following parameters of the first pilot signal; or, one or more of the following parameters of the first pilot signal are predefined:

[0177] a type of the first pilot signal;

[0178] Power parameters;

[0179] The frequency domain position of the occupied time-frequency resources;

[0180] The time domain location of the occupied time-frequency resources;

[0181] sequence generation methods; and,

[0182] Sequence generation parameters.

[0183] It is understandable that the type of the first pilot signal may be the first type pilot signal or the second type pilot signal, wherein the time-frequency resources occupied by the first type pilot signal are not used for transmitting data signals, and at least part of the time-frequency resources occupied by the second type pilot signal are used for transmitting data signals.

[0184] It should be noted that the first type of pilot signal and the second type of pilot signal can be understood with reference to the description in the above embodiment, and for the sake of brevity, they will not be described again here.

[0185] The relevant parameters of the first pilot signal are described in detail below.

[0186] (1) Power parameter of the first pilot signal.

[0187] It should be noted that the "power" mentioned in the embodiments of the present application can also be directly expanded to "energy".

[0188] Through this method, when the power parameter of the first pilot signal is indicated by the network device, the power allocation of the first pilot signal can be flexibly indicated, so that the system can optimize the transmission power of the first pilot signal according to the wireless environment and improve the system performance; when the power parameter of the first pilot signal is pre-specified, signaling overhead can be saved.

[0189] In some embodiments, when the first pilot signal is a second-type pilot signal, the power parameter of the first pilot signal includes one or more of the following:

[0190] a ratio of the power of the first pilot signal sent on the first time-frequency resource to the total power on the second time-frequency resource;

[0191] a ratio of the power of the data signal sent on the first time-frequency resource to the total power on the second time-frequency resource;

[0192] a ratio of the power of the first pilot signal sent on the first time-frequency resource to the power of the data signal sent on the first time-frequency resource; and

[0193] a ratio of power of a data signal sent on the first time-frequency resource to power of the first pilot signal sent on the first time-frequency resource;

[0194] The first time-frequency resource is any one of the at least part of the time-frequency resources, and the second time-frequency resource is a scheduled time-frequency resource.

[0195] In a possible implementation, the power parameter of the first pilot signal may be a ratio of the power of the first pilot signal sent on the first time-frequency resource to the total power of the first pilot signal on the second time-frequency resource.

[0196] The first time-frequency resource may be any one of at least some of the time-frequency resources.

[0197] It should be noted that, when the first time-frequency resource is any one of at least some of the time-frequency resources, the first time-frequency resource can be considered as a shared time-frequency resource.

[0198] It should also be noted that the total power on the second time-frequency resource may be the sum of the power of the first pilot signal sent on the second time-frequency resource and the power of the data signal sent on the second time-frequency resource.

[0199] It should also be noted that the second time-frequency resource can be any one of at least some of the time-frequency resources, in which case the second time-frequency resource can be considered a shared time-frequency resource; the second time-frequency resource may not be any one of at least some of the time-frequency resources, or in other words, the second time-frequency resource can be any one of the other time-frequency resources except at least some of the time-frequency resources, in which case the second time-frequency resource can be considered not a shared time-frequency resource.

[0200] In some embodiments, the second time-frequency resource may be any one of at least some of the time-frequency resources.

[0201] Furthermore, when the second time-frequency resource is any one of at least some of the time-frequency resources, the second time-frequency resource and the first time-frequency resource may be the same time-frequency resource or may not be the same time-frequency resource, and this embodiment of the present application does not limit this.

[0202] In other embodiments, the second time-frequency resource may not be any one of the at least part of the time-frequency resources, or in other words, the second time-frequency resource may be any one of the other time-frequency resources except the at least part of the time-frequency resources.

[0203] Exemplarily, when the ratio is a linear value, the candidate values ​​of the ratio may be one or more of the following values: {0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, 0.15, 0.20, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9}.

[0204] Exemplarily, when the ratio is a dB value, the candidate values ​​of the ratio may be one or more of the following values: {-1dB, -2dB, -3dB, -4dB, -5dB, -6dB, -7dB, -8dB, -9dB, -10dB, -11dB, -12dB, -13dB, -14dB, -15dB, -16dB, -17dB, -18dB, -19dB, -20dB}.

[0205] It should be noted that the power parameter of the first pilot signal may also be the ratio of the total power on the second time-frequency resource to the power of the first pilot signal sent on the first time-frequency resource.

[0206] Furthermore, the power parameter of the first pilot signal is the ratio of the total power on the second time-frequency resource to the power sent by the first pilot signal on the first time-frequency resource, and the power parameter of the first pilot signal is the ratio of the power sent by the first pilot signal on the first time-frequency resource to the total power on the second time-frequency resource: when these two ratios are linear values, the candidate values ​​of the two ratios are reciprocals of each other; when the two ratios are dB values, the candidate values ​​of the two ratios are opposites of each other.

[0207] It should be noted that, when the ratio is a linear value and the power parameter of the first pilot signal is indicated by the second information, the indication of the second information can be simplified.

[0208] It should also be noted that, when the ratio is a dB value and the power parameter of the first pilot signal is indicated by the second information, the second information can indicate a more subtle power difference.

[0209] Through this method, when the power parameter of the first pilot signal is indicated by the first information, the second information can directly indicate the proportion of the total power (such as the second information indicates the ratio of the power sent by the first pilot signal on the first time-frequency resource to the total power on the second time-frequency resource), thereby simplifying the calculation of the power parameter of the first pilot signal; when the power parameter of the first pilot signal is pre-specified, signaling overhead can be saved.

[0210] In another possible implementation, the power parameter of the first pilot signal may be a ratio of the power of the data signal sent on the first time-frequency resource to the total power on the second time-frequency resource.

[0211] The first time-frequency resource is any one of at least some of the time-frequency resources.

[0212] It should be noted that, when the first time-frequency resource is any one of at least some of the time-frequency resources, the first time-frequency resource can be considered as a shared time-frequency resource.

[0213] It should also be noted that the total power on the second time-frequency resource may be the sum of the power of the first pilot signal sent on the second time-frequency resource and the power of the data signal sent on the second time-frequency resource.

[0214] It should also be noted that the second time-frequency resource can be any one of at least some of the time-frequency resources, in which case the second time-frequency resource can be considered a shared time-frequency resource; the second time-frequency resource may not be any one of at least some of the time-frequency resources, or in other words, the second time-frequency resource can be any one of the other time-frequency resources except at least some of the time-frequency resources, in which case the second time-frequency resource can be considered not a shared time-frequency resource.

[0215] In some embodiments, the second time-frequency resource may be any one of at least some of the time-frequency resources.

[0216] Furthermore, when the second time-frequency resource is any one of at least some of the time-frequency resources, the second time-frequency resource and the first time-frequency resource may be the same time-frequency resource or may not be the same time-frequency resource, and this embodiment of the present application does not limit this.

[0217] In other embodiments, the second time-frequency resource may not be any one of the at least part of the time-frequency resources, or in other words, the second time-frequency resource may be any one of the other time-frequency resources except the at least part of the time-frequency resources.

[0218] It should also be noted that, when the ratio is a linear value or a dB value, the candidate values ​​of the ratio can be understood by referring to the description in the aforementioned embodiment, and for the sake of brevity, they will not be repeated here.

[0219] It should also be noted that the power parameter of the first pilot signal may also be the ratio of the total power on the second time-frequency resource to the power of the data signal sent on the first time-frequency resource.

[0220] Furthermore, the power parameter of the first pilot signal is the ratio of the total power on the second time-frequency resource to the power of the data signal sent on the first time-frequency resource, and the power parameter of the first pilot signal is the ratio of the power of the data signal sent on the first time-frequency resource to the total power on the second time-frequency resource: when these two ratios are linear values, the candidate values ​​of the two ratios are reciprocals of each other; when the two ratios are dB values, the candidate values ​​of the two ratios are opposites of each other.

[0221] It should be noted that, when the ratio is a linear value and the power parameter of the first pilot signal is indicated by the second information, the indication of the second information can be simplified.

[0222] It should also be noted that, when the ratio is a dB value and the power parameter of the first pilot signal is indicated by the second information, the second information can indicate a more subtle power difference.

[0223] Through this method, when the power parameter of the first pilot signal is indicated by the second information, the second information can directly indicate the proportion of the total power, thereby simplifying the calculation of the power parameter of the first pilot signal; when the power parameter of the first pilot signal is pre-specified, signaling overhead can be saved.

[0224] In another possible implementation, the power parameter of the first pilot signal may be a ratio of the power of the first pilot signal sent on the first time-frequency resource to the power of the data signal sent on the first time-frequency resource.

[0225] The first time-frequency resource is any one of at least some of the time-frequency resources.

[0226] It should be noted that, when the first time-frequency resource is any one of at least some of the time-frequency resources, the first time-frequency resource can be considered as a shared time-frequency resource.

[0227] It should also be noted that, when the ratio is a linear value or a dB value, the candidate values ​​of the ratio can be understood by referring to the description in the aforementioned embodiment, and for the sake of brevity, they will not be repeated here.

[0228] It should also be noted that, when the ratio is a linear value and the power parameter of the first pilot signal is indicated by the second information, the indication of the second information can be simplified.

[0229] It should also be noted that, when the ratio is a dB value and the power parameter of the first pilot signal is indicated by the second information, the second information can indicate a more subtle power difference.

[0230] Through this method, when the power parameter of the first pilot signal is indicated by the second information, compared with the second information directly indicating the proportion of the total power, the second information can make the dynamic value range of the power parameter of the first pilot signal smaller by indicating the ratio of the power sent by the first pilot signal on the first time-frequency resource to the power of the data signal sent on the first time-frequency resource, thereby improving the granularity of the indication and reducing the overhead of the indication; when the power parameter of the first pilot signal is pre-specified, signaling overhead can be saved.

[0231] In another possible implementation, the power parameter of the first pilot signal may be a ratio of the power of the data signal sent on the first time-frequency resource to the power of the first pilot signal sent on the first time-frequency resource.

[0232] The first time-frequency resource is any one of at least some of the time-frequency resources.

[0233] It should be noted that, when the first time-frequency resource is any one of at least some of the time-frequency resources, the first time-frequency resource can be considered as a shared time-frequency resource.

[0234] It should also be noted that when the ratio is a linear value and a dB value, the candidate values ​​of the ratio can be understood by referring to the description in the aforementioned embodiment. For the sake of brevity, they will not be repeated here.

[0235] It should also be noted that the power parameter of the first pilot signal is the ratio of the power of the data signal sent on the first time-frequency resource to the power of the first pilot signal sent on the first time-frequency resource, and the power parameter of the first pilot signal is the ratio of the power of the first pilot signal sent on the first time-frequency resource to the power of the data signal sent on the first time-frequency resource: when these two ratios are linear values, the candidate values ​​of the two ratios are reciprocals of each other; when the two ratios are dB values, the candidate values ​​of the two ratios are opposites of each other.

[0236] It should also be noted that, when the ratio is a linear value and the power parameter of the first pilot signal is indicated by the second information, the indication of the second information can be simplified.

[0237] It should also be noted that, when the ratio is a dB value and the power parameter of the first pilot signal is indicated by the second information, the second information can indicate a more subtle power difference.

[0238] Through this method, when the power parameter of the first pilot signal is indicated by the second information, compared with the second information directly indicating the proportion of the total power, the second information can make the dynamic value range of the power parameter of the first pilot signal smaller by indicating the ratio of the power of the data signal sent on the first time-frequency resource to the power of the first pilot signal sent on the first time-frequency resource, thereby improving the granularity of the indication and reducing the overhead of the indication; when the power parameter of the first pilot signal is pre-specified, signaling overhead can be saved.

[0239] (2) The frequency domain position of the time-frequency resources occupied by the first pilot signal.

[0240] Through this method, the frequency domain position of the time-frequency resource occupied by the first pilot signal can be flexibly changed, which can be more conducive to multi-user multiplexing and reduce pilot signal interference between multiple users.

[0241] In the embodiment of the present application, the frequency domain position of the time-frequency resource occupied by the first pilot signal may be implemented in the following ways:

[0242] In one possible implementation, the second information may indicate a frequency domain density of the time-frequency resources occupied by the first pilot signal; or the frequency domain density of the time-frequency resources occupied by the first pilot signal may be predefined. The frequency domain position of the time-frequency resources occupied by the first pilot signal may be determined based on the frequency domain density of the time-frequency resources occupied by the first pilot signal.

[0243] In the embodiment of the present application, the frequency domain density of the time-frequency resources occupied by the first pilot signal may include: the RE density of the time-frequency resources occupied by the first pilot signal, and / or the RB density of the time-frequency resources occupied by the first pilot signal.

[0244] When the frequency domain density of the time-frequency resources occupied by the first pilot signal is the RE density of the time-frequency resources occupied by the first pilot signal, the RE density of the time-frequency resources occupied by the first pilot signal may be the RE density of the time-frequency resources occupied by the first pilot signal within one RB. The RE density of the time-frequency resources occupied by the first pilot signal within one RB may be a first value, and there is a mapping relationship between the first value and the number of REs of the time-frequency resources occupied by the first pilot signal within one RB.

[0245] Furthermore, there is a one-to-one mapping relationship between the first value and the number of REs within one RB range of the time-frequency resources occupied by the first pilot signal.

[0246] In some embodiments, when the first value is less than or equal to 1, the number of REs of the time-frequency resources occupied by the first pilot signal within an RB range is the product of the first value and the total number of REs within the RB range.

[0247] For example, assuming that there are 12 REs (corresponding to 12 subcarriers) within an RB range, and the RE density of the time-frequency resources occupied by the first pilot signal within the RB range is 1 / 2 (that is, the first value is 1 / 2), then it can be obtained that the number of REs of the time-frequency resources occupied by the first pilot signal within the RB range is 12*1 / 2=6.

[0248] For example, assuming that there are 12 REs (corresponding to 12 subcarriers) within an RB range, and the RE density of the time-frequency resources occupied by the first pilot signal within the RB range is 1 (that is, the first value is 1), then it can be obtained that the number of REs of the time-frequency resources occupied by the first pilot signal within the RB range is 12.

[0249] In some other embodiments, when the first value is greater than 1, the number of REs of the time-frequency resources occupied by the first pilot signal within one RB range is equal to the first value.

[0250] For example, assuming that there are 12 REs (corresponding to 12 subcarriers) within an RB range, and the RE density of the time-frequency resources occupied by the first pilot signal within the RB range is 6 (that is, the first value is 6), then it can be obtained that the number of REs of the time-frequency resources occupied by the first pilot signal within the RB range is 6.

[0251] Through this method, when the frequency domain density of the time-frequency resources occupied by the first pilot signal is the RE density of the time-frequency resources occupied by the first pilot signal, the RE density of the time-frequency resources occupied by the first pilot signal can be flexibly changed according to the wireless environment, thereby better matching the wireless channel and improving system performance.

[0252] When the frequency domain density of the time-frequency resources occupied by the first pilot signal is the RB density of the time-frequency resources occupied by the first pilot signal, the RB density of the time-frequency resources occupied by the first pilot signal may be a second value. Assuming that one RB in every X RBs is used to transmit the first pilot signal, there is a mapping relationship between the second value and the value of X, where X is a positive integer.

[0253] Furthermore, there is a one-to-one mapping relationship between the second value and the value of X.

[0254] In some embodiments, when the second value is less than or equal to 1, the value of X is the reciprocal of the second value.

[0255] Exemplarily, assuming that the RB density of the time-frequency resources occupied by the first pilot signal is 0.5 (ie, the second value is 0.5), the value of X is 1 / 0.5=2, that is, one RB in every two RBs is used to transmit the first pilot signal.

[0256] Exemplarily, assuming that the RB density of the time-frequency resources occupied by the first pilot signal is 1 (ie, the second value is 1), the value of X is 1, that is, each RB is used to transmit the first pilot signal.

[0257] In other embodiments, when the second value is greater than 1, the value of X is equal to the second value.

[0258] Exemplarily, assuming that the RB density of the time-frequency resources occupied by the first pilot signal is 2 (ie, the second value is 2), the value of X is 2, that is, one RB in every two RBs is used to transmit the first pilot signal.

[0259] It should be noted that, at least part of REs in an RB of time-frequency resources occupied by the first pilot signal are used to transmit the first pilot signal.

[0260] Furthermore, the at least part of the REs may be one RE in an RB, or multiple REs in an RB (not all REs in an RB), or all REs in an RB, which is not limited in the embodiments of the present application.

[0261] Through this method, when the frequency domain density of the time-frequency resources occupied by the first pilot signal is the RB density of the time-frequency resources occupied by the first pilot signal, the RB density of the time-frequency resources occupied by the first pilot signal can be changed with greater granularity according to the wireless environment, which is more flexible and more conducive to multi-user multiplexing, reducing pilot signal interference between multiple users.

[0262] In another possible implementation, the second information may indicate a frequency domain offset value of the time-frequency resource occupied by the first pilot signal; or the frequency domain offset value of the time-frequency resource occupied by the first pilot signal is predefined. The frequency domain position of the time-frequency resource occupied by the first pilot signal may be determined based on the frequency domain offset value of the time-frequency resource occupied by the first pilot signal.

[0263] In this embodiment of the present application, the frequency domain offset value of the time-frequency resources occupied by the first pilot signal may include: the RE offset value of the time-frequency resources occupied by the first pilot signal, and / or the RB offset value of the time-frequency resources occupied by the first pilot signal.

[0264] When the frequency domain offset value of the time-frequency resources occupied by the first pilot signal is the RE offset value of the time-frequency resources occupied by the first pilot signal, the RE of the time-frequency resources occupied by the first pilot signal within the RB range can be obtained based on the RE offset value of the time-frequency resources occupied by the first pilot signal and the number of REs of the time-frequency resources occupied by the first pilot signal within the RB range.

[0265] For example, assuming that there are 12 REs (corresponding to 12 subcarriers) within an RB range, the RE offset value of the time-frequency resources occupied by the first pilot signal is offset_RE, and the number of REs of the time-frequency resources occupied by the first pilot signal within the RB range is Y, then the identifiers (or positions, similar to other places, and no further description is given) of the REs of the time-frequency resources occupied by the first pilot signal within the RB range are: offset_RE, offset_RE+12 / Y, offset_RE+2*12 / Y, offset_RE+3*12 / Y, etc.; where Y is a positive integer.

[0266] Through this method, when the frequency domain offset value of the time-frequency resources occupied by the first pilot signal is the RE offset value of the time-frequency resources occupied by the first pilot signal, the RE (or subcarrier) allocation of the time-frequency resources occupied by the first pilot signal can be flexibly changed, which can be more conducive to multi-user multiplexing and reduce pilot signal interference between multiple users.

[0267] When the frequency domain offset value of the time-frequency resources occupied by the first pilot signal is the RB offset value of the time-frequency resources occupied by the first pilot signal, the RB of the time-frequency resources occupied by the first pilot signal can be obtained according to the RB offset value of the time-frequency resources occupied by the first pilot signal and the value of X (one RB in every X RBs is used to transmit the first pilot signal).

[0268] For example, assuming that the RB offset value of the time-frequency resource occupied by the first pilot signal is offset_RB, the identifiers (or positions, which are similar in other places and will not be repeated here) of the RBs of the time-frequency resources occupied by the first pilot signal are: offset_RB, offset_RB+X, offset_RB+2*X, offset_RB+3*X, and so on.

[0269] Through this method, when the frequency domain offset value of the time-frequency resources occupied by the first pilot signal is the RB offset value of the time-frequency resources occupied by the first pilot signal, the RB allocation of the time-frequency resources occupied by the first pilot signal can be flexibly changed, which can be more conducive to multi-user multiplexing and reduce pilot signal interference between multiple users.

[0270] In another possible implementation, the second information may indicate a frequency domain pattern of the time-frequency resources occupied by the first pilot signal; or the frequency domain pattern of the time-frequency resources occupied by the first pilot signal is predefined. The frequency domain position of the time-frequency resources occupied by the first pilot signal may be determined based on the frequency domain pattern of the time-frequency resources occupied by the first pilot signal.

[0271] In this embodiment of the present application, the frequency domain pattern of the time-frequency resources occupied by the first pilot signal may include: the RE pattern of the time-frequency resources occupied by the first pilot signal, and / or the RB pattern of the time-frequency resources occupied by the first pilot signal.

[0272] When the frequency domain pattern of the time-frequency resources occupied by the first pilot signal is the RE pattern of the time-frequency resources occupied by the first pilot signal, the RE pattern can be determined by pre-regulation and / or network device configuration. The RE pattern can identify the time-frequency resources occupied by the first pilot signal.

[0273] Exemplarily, Figures 8 and 9 may be RE patterns determined by pre-regulation and / or network device configuration, and the RE pattern of the time-frequency resources occupied by the first pilot signal may be one of the RE patterns shown in Figure 8 and the RE patterns shown in Figure 9.

[0274] Exemplarily, assuming that the RE pattern of the time-frequency resources occupied by the first pilot signal is the RE pattern shown in Figure 8, the identifiers of the REs within an RB range of the time-frequency resources occupied by the first pilot signal are: 0, 2, 4, 6, 8, and 10 respectively.

[0275] Exemplarily, assuming that the RE pattern of the time-frequency resources occupied by the first pilot signal is the RE pattern shown in Figure 9, the identifiers of the REs within an RB range of the time-frequency resources occupied by the first pilot signal are: 1, 3, 5, 7, 9, 11 respectively.

[0276] It should be noted that the RE pattern of the time-frequency resources occupied by the first pilot signal can be determined by the indication of the second information to be the RE pattern shown in Figure 8 or the RE pattern shown in Figure 9; or, it can be pre-specified that the RE pattern of the time-frequency resources occupied by the first pilot signal is the RE pattern shown in Figure 8 or the RE pattern shown in Figure 9. At this time, when the second information indicates the first pilot signal, it can implicitly indicate the RE pattern of the time-frequency resources occupied by the first pilot signal.

[0277] It should be noted that the examples shown in Figures 8 and 9 are all based on one symbol. It should be understood that the examples shown based on Figures 8 and 9 can also be directly extended to multiple symbols, and this embodiment of the present application will not be further described.

[0278] Through this method, when the frequency domain pattern of the time-frequency resources occupied by the first pilot signal is the RE pattern of the time-frequency resources occupied by the first pilot signal, the RE (or subcarrier) allocation of the time-frequency resources occupied by the first pilot signal can be flexibly changed, thereby being more conducive to multi-user multiplexing and reducing pilot signal interference between multiple users. In addition, the RE pattern of the time-frequency resources occupied by the first pilot signal can be determined by pre-regulation and / or network device configuration, thereby reducing signaling overhead.

[0279] When the frequency domain pattern of the time-frequency resources occupied by the first pilot signal is an RB pattern of the time-frequency resources occupied by the first pilot signal, the RB pattern may be determined by pre-specification and / or network device configuration. The RB pattern may identify the time-frequency resources occupied by the first pilot signal.

[0280] It should also be noted that the exemplary description of the RB pattern of the time-frequency resources occupied by the first pilot signal can be understood by referring to the description in the aforementioned embodiment, and for the sake of brevity, it will not be repeated here.

[0281] This method allows for flexible change of the RB allocation of the time-frequency resources occupied by the first pilot signal, when the frequency domain pattern of the time-frequency resources occupied by the first pilot signal is the RB pattern of the time-frequency resources occupied by the first pilot signal. This facilitates multi-user multiplexing and reduces pilot signal interference between multiple users. Furthermore, the RB pattern of the time-frequency resources occupied by the first pilot signal can be determined by pre-determining and / or network device configuration, thereby reducing signaling overhead.

[0282] Based on the foregoing possible implementations, the frequency domain position of the time-frequency resource occupied by the first pilot signal may be determined according to one or more of the following parameters indicated by the second information:

[0283] Frequency domain density of time-frequency resources occupied by the first pilot signal;

[0284] A frequency domain offset value of the time-frequency resource occupied by the first pilot signal; and

[0285] The frequency domain pattern of the time-frequency resources occupied by the first pilot signal.

[0286] Exemplarily, the frequency domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the frequency domain density of the time-frequency resource occupied by the first pilot signal. For example, the frequency domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the RE density of the time-frequency resource occupied by the first pilot signal, in which case the RE offset value of the time-frequency resource occupied by the first pilot signal can be determined by pre-regulation and / or network device configuration; and / or, the frequency domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the RB density of the time-frequency resource occupied by the first pilot signal, in which case the RB offset value of the time-frequency resource occupied by the first pilot signal can be determined by pre-regulation and / or network device configuration.

[0287] Exemplarily, the frequency domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the frequency domain offset value of the time-frequency resource occupied by the first pilot signal. For example, the frequency domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the RE offset value of the time-frequency resource occupied by the first pilot signal, in which case the RE density of the time-frequency resource occupied by the first pilot signal can be determined by pre-regulation and / or network device configuration; and / or, the frequency domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the RB offset value of the time-frequency resource occupied by the first pilot signal, in which case the RB density of the time-frequency resource occupied by the first pilot signal can be determined by pre-regulation and / or network device configuration.

[0288] Exemplarily, the frequency domain position of the time-frequency resource occupied by the first pilot signal may be determined based on the frequency domain pattern of the time-frequency resource occupied by the first pilot signal. For example, the frequency domain position of the time-frequency resource occupied by the first pilot signal may be determined based on the RE pattern of the time-frequency resource occupied by the first pilot signal; and / or the frequency domain position of the time-frequency resource occupied by the first pilot signal may be determined based on the RB pattern of the time-frequency resource occupied by the first pilot signal.

[0289] Exemplarily, the frequency domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the frequency domain density and frequency domain offset value of the time-frequency resource occupied by the first pilot signal. For example, the frequency domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the RE density and / or RB density of the time-frequency resource occupied by the first pilot signal, and the RE offset value and / or RB offset value of the time-frequency resource occupied by the first pilot signal.

[0290] Exemplarily, the frequency domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the frequency domain density and frequency domain pattern of the time-frequency resource occupied by the first pilot signal. For example, the frequency domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the RE density and / or RB density of the time-frequency resource occupied by the first pilot signal, as well as the RE pattern and / or RB pattern of the time-frequency resource occupied by the first pilot signal.

[0291] Exemplarily, the frequency domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the frequency domain offset value and frequency domain pattern of the time-frequency resource occupied by the first pilot signal. For example, the frequency domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the RE offset value and / or RB offset value of the time-frequency resource occupied by the first pilot signal, and the RE pattern and / or RB pattern of the time-frequency resource occupied by the first pilot signal.

[0292] Exemplarily, the frequency domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the frequency domain density, frequency domain offset value, and frequency domain pattern of the time-frequency resource occupied by the first pilot signal. For example, the frequency domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the RE density and / or RB density of the time-frequency resource occupied by the first pilot signal, the RE offset value and / or RB offset value of the time-frequency resource occupied by the first pilot signal, and the RE pattern and / or RB pattern of the time-frequency resource occupied by the first pilot signal.

[0293] In the embodiment of the present application, when the second information is used to indicate the frequency domain position of the time-frequency resource occupied by the first pilot signal, there are the following two possible implementation methods.

[0294] In a possible implementation manner, the second information may indicate the frequency domain position of the time-frequency resource occupied by the first pilot signal through a first bitmap.

[0295] Exemplarily, the second information may indicate, through a first bitmap, the RB used to transmit the first pilot signal and / or the REs within an RB used to transmit the first pilot signal. For example, the second information may indicate, through a first bitmap with a length of 12 bits or 16 bits, the REs within an RB used to transmit the first pilot signal; wherein, the REs corresponding to a value of 1 in the first bitmap are used to transmit the first pilot signal.

[0296] Through this method, the second information can indicate the RB used to transmit the first pilot signal and / or the RE used to transmit the first pilot signal within an RB range through a first bit map, thereby improving the flexibility of the second information indicating the frequency domain position of the time-frequency resources occupied by the first pilot signal.

[0297] In another possible implementation, the second information may indicate the frequency domain position of the time-frequency resource occupied by the first pilot signal through an identifier of the frequency domain resource.

[0298] It should be noted that the way in which the second information indicates the frequency domain position of the time-frequency resource occupied by the first pilot signal through the identifier of the frequency domain resource is a way to directly indicate the frequency domain position of the time-frequency resource occupied by the first pilot signal.

[0299] Exemplarily, the second information may indicate the REs used to transmit the first pilot signal within an RB range through an identifier of the RE; and / or, the second information may indicate the RB used to transmit the first pilot signal through an identifier of the RB.

[0300] Through this method, the second information directly indicates the frequency domain position of the time-frequency resource occupied by the first pilot signal through the identification of the frequency domain resource, thereby improving the flexibility of the second information when indicating the frequency domain position of the time-frequency resource occupied by the first pilot signal.

[0301] (3) The time domain position of the time-frequency resources occupied by the first pilot signal.

[0302] Through this method, the time domain position of the time-frequency resource occupied by the first pilot signal can be flexibly changed, thereby achieving a better balance between the total power of the pilot signal and the channel estimation performance, thereby improving system performance.

[0303] In the embodiment of the present application, the time domain position of the time-frequency resource occupied by the first pilot signal may be implemented in the following ways:

[0304] In one possible implementation, the second information may indicate a time-domain density of the time-frequency resources occupied by the first pilot signal; or the time-domain density of the time-frequency resources occupied by the first pilot signal is predefined. The time-domain position of the time-frequency resources occupied by the first pilot signal may be determined based on the time-domain density of the time-frequency resources occupied by the first pilot signal.

[0305] In the embodiment of the present application, the time domain density of the time-frequency resources occupied by the first pilot signal may include: the symbol density of the time-frequency resources occupied by the first pilot signal, and / or the time slot density of the time-frequency resources occupied by the first pilot signal.

[0306] When the time domain density of the time-frequency resources occupied by the first pilot signal is the symbol density of the time-frequency resources occupied by the first pilot signal, the symbol density of the time-frequency resources occupied by the first pilot signal may be the symbol density of the time-frequency resources occupied by the first pilot signal within a time slot. The symbol density of the time-frequency resources occupied by the first pilot signal within a time slot may be a third value, and there is a mapping relationship between the third value and the number of symbols of the time-frequency resources occupied by the first pilot signal within a time slot.

[0307] Furthermore, there is a one-to-one mapping relationship between the third value and the number of symbols of the time-frequency resources occupied by the first pilot signal within a time slot.

[0308] In some embodiments, when the third value is less than or equal to 1, the number of symbols of the time-frequency resources occupied by the first pilot signal within a time slot is the product of the third value and the total number of symbols within the time slot.

[0309] For example, assuming that there are 14 symbols in a time slot, the symbol density of the time-frequency resources occupied by the first pilot signal in the time slot is 1 / 2 (that is, the third value is 1 / 2), then it can be obtained that the number of symbols of the time-frequency resources occupied by the first pilot signal in the time slot is 14*1 / 2=7.

[0310] For example, assuming that there are 14 symbols in a time slot range, and the symbol density of the time-frequency resources occupied by the first pilot signal in the time slot range is 1 (that is, the third value is 1), then it can be obtained that the number of symbols of the time-frequency resources occupied by the first pilot signal in the time slot range is 14.

[0311] In some other embodiments, when the third value is greater than 1, the number of symbols of the time-frequency resources occupied by the first pilot signal within a time slot is equal to the third value.

[0312] For example, assuming that there are 14 symbols in a time slot range, and the symbol density of the time-frequency resources occupied by the first pilot signal in the time slot range is 6 (that is, the third value is 6), then it can be obtained that the number of symbols of the time-frequency resources occupied by the first pilot signal in the time slot range is 6.

[0313] Through this method, when the time domain density of the first pilot signal occupying the time-frequency resources is the symbol density of the first pilot signal occupying the time-frequency resources, the first device can flexibly change the symbol density of the first pilot signal occupying the time-frequency resources according to the wireless environment, so as to better match the current channel and improve system performance.

[0314] When the time domain density of the time-frequency resources occupied by the first pilot signal is the time slot density of the time-frequency resources occupied by the first pilot signal, the time slot density of the time-frequency resources occupied by the first pilot signal may be a fourth value. Assuming that one time slot in every P time slots is used to transmit the first pilot signal, there is a mapping relationship between the fourth value and the value of P; where P is a positive integer.

[0315] Furthermore, there is a one-to-one mapping relationship between the fourth value and the value of P.

[0316] In some embodiments, when the fourth value is less than or equal to 1, the value of P is the reciprocal of the fourth value.

[0317] Exemplarily, assuming that the time slot density of the time-frequency resource occupied by the first pilot signal is 0.5 (ie, the fourth value is 0.5), the value of P is 1 / 0.5=2, that is, one time slot in every two time slots is used to transmit the first pilot signal.

[0318] Exemplarily, assuming that the time slot density of the time-frequency resource occupied by the first pilot signal is 1 (ie, the fourth value is 1), the value of P is 1, that is, each time slot is used to transmit the first pilot signal.

[0319] In other embodiments, when the fourth value is greater than 1, the value of P is equal to the fourth value.

[0320] Exemplarily, assuming that the time slot density of the time-frequency resource occupied by the first pilot signal is 2 (ie, the fourth value is 2), the value of P is 2, that is, one time slot in every two time slots is used to transmit the first pilot signal.

[0321] It should be noted that the first pilot signal occupies at least part of the symbols in a time slot of the time-frequency resource for transmitting the first pilot signal.

[0322] Furthermore, the at least partial symbol may be a symbol in a time slot, or multiple symbols in a time slot (not all symbols in a time slot), or all symbols in a time slot, which is not limited in the embodiments of the present application.

[0323] Through this method, when the time domain density of the time-frequency resources occupied by the first pilot signal is the time slot density of the time-frequency resources occupied by the first pilot signal, the first device can change the time slot density of the time-frequency resources occupied by the first pilot signal with a larger granularity according to the wireless environment, which is more flexible and more conducive to multi-user multiplexing, reducing pilot signal interference between multiple users.

[0324] In another possible implementation, the second information may indicate a time domain offset value of the time-frequency resource occupied by the first pilot signal; or the time domain offset value of the time-frequency resource occupied by the first pilot signal may be predefined. The time domain position of the time-frequency resource occupied by the first pilot signal may be determined based on the time domain offset value of the time-frequency resource occupied by the first pilot signal.

[0325] In an embodiment of the present application, the time domain offset value of the time-frequency resource occupied by the first pilot signal may include: the symbol offset value of the time-frequency resource occupied by the first pilot signal, and / or the time slot offset value of the time-frequency resource occupied by the first pilot signal.

[0326] When the time domain offset value of the time-frequency resources occupied by the first pilot signal is the symbol offset value of the time-frequency resources occupied by the first pilot signal, the symbol of the time-frequency resources occupied by the first pilot signal within the time slot can be obtained based on the symbol offset value of the time-frequency resources occupied by the first pilot signal and the number of symbols of the time-frequency resources occupied by the first pilot signal within the time slot.

[0327] For example, assuming that there are 14 symbols within a time slot, the symbol offset value of the time-frequency resources occupied by the first pilot signal is offset_symbol, and the number of symbols of the time-frequency resources occupied by the first pilot signal within the time slot is Q, then the identifiers of the symbols of the time-frequency resources occupied by the first pilot signal within the time slot are: offset_symbol, offset_symbol+14 / Q, offset_symbol+2*14 / Q, offset_symbol+3*14 / Q, etc.; where Q is a positive integer.

[0328] Through this method, when the time domain offset value of the time-frequency resources occupied by the first pilot signal is the symbol offset value of the time-frequency resources occupied by the first pilot signal, the first device can flexibly change the symbol allocation of the time-frequency resources occupied by the first pilot signal, so as to better match the current channel, be more conducive to multi-user multiplexing, and reduce pilot signal interference between multiple users.

[0329] When the time domain offset value of the time-frequency resources occupied by the first pilot signal is the time slot offset value of the time-frequency resources occupied by the first pilot signal, the time slot of the time-frequency resources occupied by the first pilot signal can be obtained according to the time slot offset value of the time-frequency resources occupied by the first pilot signal and the value of P (one time slot in every P time slots is used to transmit the first pilot signal).

[0330] Exemplarily, assuming that the time slot offset value of the time-frequency resource occupied by the first pilot signal is offset_slot, the identifiers of the time slots of the time-frequency resource occupied by the first pilot signal are offset_slot, offset_slot+P, offset_slot+2*P, offset_slot+3*P, and so on.

[0331] Through this method, when the time domain offset value of the time-frequency resources occupied by the first pilot signal is the time slot offset value of the time-frequency resources occupied by the first pilot signal, the first device can flexibly change the time slot allocation of the time-frequency resources occupied by the first pilot signal, thereby better matching the wireless channel, being more conducive to multi-user multiplexing, and reducing pilot signal interference between multiple users.

[0332] In another possible implementation, the second information may indicate a time domain pattern of the time-frequency resources occupied by the first pilot signal; or the time domain pattern of the time-frequency resources occupied by the first pilot signal is predefined. The time domain position of the time-frequency resources occupied by the first pilot signal may be determined based on the time domain pattern of the time-frequency resources occupied by the first pilot signal.

[0333] In the embodiment of the present application, the time domain pattern of the time-frequency resources occupied by the first pilot signal may include: the symbol pattern of the time-frequency resources occupied by the first pilot signal, and / or the time slot pattern of the time-frequency resources occupied by the first pilot signal.

[0334] When the time domain pattern of the time-frequency resources occupied by the first pilot signal is a symbol pattern of the time-frequency resources occupied by the first pilot signal, the symbol pattern may be determined by pre-regulation and / or network device configuration. The symbol pattern may identify the time-frequency resources occupied by the first pilot signal.

[0335] It should also be noted that the exemplary description of the symbol pattern of the first pilot signal occupying the time-frequency resources can be understood by referring to the description in the aforementioned embodiment, and for the sake of brevity, it will not be repeated here.

[0336] Through this method, when the time-domain pattern of the time-frequency resources occupied by the first pilot signal is the symbol pattern of the time-frequency resources occupied by the first pilot signal, the first device can flexibly change the symbol allocation of the time-frequency resources occupied by the first pilot signal, thereby facilitating multi-user multiplexing and reducing pilot signal interference between multiple users. In addition, the symbol pattern of the time-frequency resources occupied by the first pilot signal can be determined by pre-determining and / or network device configuration, thereby reducing signaling overhead.

[0337] When the time domain pattern of the time-frequency resources occupied by the first pilot signal is a time slot pattern of the time-frequency resources occupied by the first pilot signal, the time slot pattern may be determined by pre-regulation and / or network device configuration. The time slot pattern may identify the time-frequency resources occupied by the first pilot signal.

[0338] It should also be noted that the exemplary description of the time slot pattern of the first pilot signal occupying the time-frequency resources can be understood by referring to the description in the aforementioned embodiment, and for the sake of brevity, it will not be repeated here.

[0339] Through this method, when the time domain pattern of the time-frequency resources occupied by the first pilot signal is the time slot pattern of the time-frequency resources occupied by the first pilot signal, the first device can flexibly change the time slot allocation of the time-frequency resources occupied by the first pilot signal, thereby facilitating multi-user multiplexing and reducing pilot signal interference between multiple users. In addition, the time slot pattern of the time-frequency resources occupied by the first pilot signal can be determined by pre-determining and / or network device configuration, thereby reducing signaling overhead.

[0340] Based on the foregoing possible implementations, the time-domain position of the time-frequency resource occupied by the first pilot signal may be determined according to one or more of the following parameters indicated by the second information:

[0341] time domain density of time-frequency resources occupied by the first pilot signal;

[0342] The time domain offset value of the time-frequency resource occupied by the first pilot signal; and

[0343] The time domain pattern of the time-frequency resources occupied by the first pilot signal.

[0344] Exemplarily, the time domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the time domain density of the time-frequency resource occupied by the first pilot signal. For example, the time domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the symbol density of the time-frequency resource occupied by the first pilot signal, in which case the symbol offset value of the time-frequency resource occupied by the first pilot signal can be determined by pre-regulation and / or network device configuration; and / or the time domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the time slot density of the time-frequency resource occupied by the first pilot signal, in which case the time slot offset value of the time-frequency resource occupied by the first pilot signal can be determined by pre-regulation and / or network device configuration.

[0345] Exemplarily, the time domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the time domain offset value of the time-frequency resource occupied by the first pilot signal. For example, the time domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the symbol offset value of the time-frequency resource occupied by the first pilot signal, in which case the symbol density of the time-frequency resource occupied by the first pilot signal can be determined by pre-regulation and / or network device configuration; and / or, the time domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the time slot offset value of the time-frequency resource occupied by the first pilot signal, in which case the time slot density of the time-frequency resource occupied by the first pilot signal can be determined by pre-regulation and / or network device configuration.

[0346] Exemplarily, the time domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the time domain pattern of the time-frequency resource occupied by the first pilot signal. For example, the time domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the symbol pattern of the time-frequency resource occupied by the first pilot signal; and / or the time domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the time slot pattern of the time-frequency resource occupied by the first pilot signal.

[0347] Exemplarily, the time domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the time domain density and time domain offset value of the time-frequency resource occupied by the first pilot signal. For example, the time domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the symbol density and / or time slot density of the time-frequency resource occupied by the first pilot signal, and the symbol offset value and / or time slot offset value of the time-frequency resource occupied by the first pilot signal.

[0348] Exemplarily, the time domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the time domain density and time domain pattern of the time-frequency resource occupied by the first pilot signal. For example, the time domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the symbol density and / or time slot density of the time-frequency resource occupied by the first pilot signal, as well as the symbol pattern and / or time slot pattern of the time-frequency resource occupied by the first pilot signal.

[0349] Exemplarily, the time domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the time domain offset value and the time domain pattern of the time-frequency resource occupied by the first pilot signal. For example, the time domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the symbol offset value and / or time slot offset value of the time-frequency resource occupied by the first pilot signal, and the symbol pattern and / or time slot pattern of the time-frequency resource occupied by the first pilot signal.

[0350] Exemplarily, the time domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the time domain density, time domain offset value, and time domain pattern of the time-frequency resource occupied by the first pilot signal. For example, the time domain position of the time-frequency resource occupied by the first pilot signal can be determined based on the symbol density and / or time slot density of the time-frequency resource occupied by the first pilot signal, the symbol offset value and / or time slot offset value of the time-frequency resource occupied by the first pilot signal, and the symbol pattern and / or time slot pattern of the time-frequency resource occupied by the first pilot signal.

[0351] In the embodiment of the present application, when the second information is used to indicate the time domain position of the time-frequency resource occupied by the first pilot signal, there are the following two possible implementation methods.

[0352] In a possible implementation, the second information indicates the time domain position of the time-frequency resources occupied by the first pilot signal through a second bit map.

[0353] Exemplarily, the second information may indicate, via a second bitmap, a time slot for transmitting the first pilot signal and / or a symbol within a time slot for transmitting the first pilot signal. For example, the second information may indicate, via a second bitmap having a length of 14 bits, a symbol within a time slot for transmitting the first pilot signal; wherein a symbol corresponding to a value of 1 in the second bitmap is used to transmit the first pilot signal.

[0354] Through this method, the second information can indicate the time slot used to transmit the first pilot signal and / or the symbol used to transmit the first pilot signal within a time slot through a second bit map, thereby improving the flexibility of the second information when indicating the time domain position of the time-frequency resources occupied by the first pilot signal.

[0355] In another possible implementation, the second information may indicate the time domain position of the time-frequency resource occupied by the first pilot signal through an identifier of the time domain resource.

[0356] It should be noted that the way in which the second information indicates the time domain position of the time-frequency resource occupied by the first pilot signal through the identifier of the time domain resource is a way to directly indicate the time domain position of the time-frequency resource occupied by the first pilot signal.

[0357] Exemplarily, the second information may indicate a symbol used to transmit the first pilot signal in a time slot through a symbol identifier; and / or, the second information may indicate a time slot used to transmit the first pilot signal through a time slot identifier.

[0358] Through this method, the second information directly indicates the time domain position of the first pilot signal occupying the time-frequency resource through the identifier of the time domain resource, thereby improving the flexibility of the second information in indicating the time domain position of the first pilot signal occupying the time-frequency resource.

[0359] (4) A method for generating a sequence of a first pilot signal.

[0360] In an embodiment of the present application, the sequence generation method of the first pilot signal may be a generation method of different types of sequences;.

[0361] Illustratively, the type of sequence may be a Gold sequence, a ZC sequence, an M sequence, etc., which is not limited in the embodiments of the present application.

[0362] By using this method, the sequences between different users can be optimized based on the sequence generation method of the first pilot signal, interference between sequences can be reduced, and system performance can be improved.

[0363] (5) Sequence generation parameters of the first pilot signal.

[0364] Through this method, the first information can flexibly indicate the sequence generation of the corresponding port of the first pilot signal, thereby reducing sequence interference of pilot signals between multiple layers and improving system performance.

[0365] In some embodiments, the sequence generation parameters of the first pilot signal may include one or more of the following:

[0366] An identifier of a time domain resource in the time-frequency resources occupied by the first pilot signal;

[0367] an identifier of the system frame number (SNF) in which the first pilot signal resides;

[0368] an identifier of the cell where the first pilot signal is located;

[0369] an identifier of the carrier where the first pilot signal is located;

[0370] an identifier of a port of the first pilot signal;

[0371] a scrambling parameter of the first pilot signal;

[0372] an identification of a control channel of a data signal; and,

[0373] Other parameters for network configuration.

[0374] It should be noted that the identifier of the time domain resources occupied by the first pilot signal in the time-frequency resources may include one or more of the following: the identifier of the time slot (Slot) occupied by the first pilot signal in the time-frequency resources; the identifier of the symbol occupied by the first pilot signal in the time-frequency resources; and the identifier of the symbol occupied by the first pilot signal in the time-frequency resources within a time slot or a subframe (Sub-Frame) or a frame (Frame).

[0375] Exemplarily, the identifier of the cell where the first pilot signal is located may be an identifier of the physical layer cell where the first pilot signal is located.

[0376] Exemplarily, the carrier where the first pilot signal is located may be a component carrier in carrier aggregation.

[0377] Exemplarily, the identifier of the control channel of the data signal may be a group identifier corresponding to a control resource set (Control Resource Set, CORESET).

[0378] It should be noted that the sequence corresponding to port i of the first pilot signal can be generated based on the port identifier i. Furthermore, the port identifier of the first pilot signal can be the identifier of some ports of the first pilot signal, or the identifier of each port of the first pilot signal, which is not limited in this embodiment of the present application.

[0379] It should also be noted that the sequence generation parameters of the first pilot signal may also include other relevant parameters configured by the network device.

[0380] By using this method, the sequence of the first pilot signal can be randomized, sequence interference of pilot signals between multiple layers can be reduced, and system performance can be improved.

[0381] In some embodiments, pilot signals associated with the plurality of random access signal groups configured in the second information may be used for different channels. In other words, pilot signals associated with different random access signal groups may be used for different data / control information transmissions.

[0382] For example, the first pilot signal associated with the first random access signal may be used for one or more of a subsequent downlink data channel, a downlink control channel, an uplink data channel, and an uplink control channel. That is, the terminal device and the network device use the first pilot signal for communication when subsequently transmitting one or more of the downlink data channel, the downlink control channel, the uplink data channel, and the uplink control channel.

[0383] It should be noted that in the embodiment of the present application, since the terminal device indicates the first pilot signal through the first random access signal, when the first pilot signal is used for a downlink data channel, the downlink data channel may include a PDSCH that transmits a random access response (Random Access Response, RAR) corresponding to the first random access signal. In the embodiment of the present application, the RAR corresponding to the first random access signal is referred to as the first RAR. In addition, when the first pilot signal is used for a downlink control channel, the downlink control channel may include a PDCCH that schedules the PDSCH of the first RAR.

[0384] In an embodiment of the present application, the channel or channels for which the first pilot signal is specifically targeted can be determined by predetermined rules, or by the above-mentioned second information (in this case, the seventh information mentioned above can refer to the second information in this embodiment).

[0385] It is understandable that the network device can indicate to the terminal device, through the second information, the specific channel for which the first pilot signal is used. In other words, when the network device configures multiple random access signal groups for the terminal device (or in other words, the network device configures multiple groups of random access signal groups for the terminal device), it can also simultaneously indicate the specific channels for pilot signals associated with different random access signal groups.

[0386] By using this method, the first pilot signal can be indicated for different channels. In this way, different channels can be distinguished and the best pilot signal can be selected for each channel, thereby improving the performance of each channel.

[0387] In some embodiments, after the terminal device sends the first information (ie, the terminal device sends the first random access signal) at S110, the terminal device may receive the first RAR corresponding to the first random access signal based on the first pilot signal associated with the first random access signal.

[0388] It should be noted that the terminal device receiving the first RAR may be receiving the PDSCH that transmits the first RAR, or receiving the PDCCH that schedules the PDSCH that schedules the first RAR, or receiving the PDSCH that transmits the first RAR and the PDCCH that schedules the PDSCH.

[0389] In some embodiments, referring to the third flow diagram of the communication method shown in FIG10A , after the terminal device sends the first information at S110 , the communication method provided in the embodiment of the present application may further include the following steps:

[0390] S120A. The network device sends third information to the terminal device. Correspondingly, the terminal device receives the third information sent by the network device. The third information is used to confirm the first pilot signal.

[0391] It should be noted that the third information here may be the first RAR in the above embodiment.

[0392] It is understandable that after receiving the first random access signal, the network device may send third information to the terminal device, wherein the network device may indicate in the third information whether to use the first pilot signal associated with the first random access signal in subsequent channel transmission.

[0393] Exemplarily, the network device may indicate, through one of the third information, to use the first pilot signal associated with the first random access signal. In this way, in subsequent transmissions, the terminal device may perform corresponding reception and / or transmission according to the first pilot signal.

[0394] Through this method, the network device can confirm the first pilot signal associated with the first random access signal through the third information, so that the network device and the terminal device can have consistent understanding, thereby improving communication reliability.

[0395] In some embodiments, referring to the fourth flow chart of the communication method shown in FIG10B , after the terminal device sends the first information at S110 , the communication method provided in the embodiment of the present application may further include the following steps:

[0396] S120B: The network device sends fourth information to the terminal device, and correspondingly, the terminal device receives the fourth information sent by the network device, wherein the fourth information requests confirmation of whether to use the first pilot signal.

[0397] S130: The terminal device sends response information of the fourth information to the network device, and the network device receives the response information accordingly, wherein the response information is used to indicate whether to use the first pilot signal or not to use the first pilot signal.

[0398] It should be noted that the fourth information here may be the first RAR in the above embodiment. The fourth information may instruct the terminal device to send confirmation information, requesting the terminal device to confirm whether to use the first pilot signal associated with the first random access signal for corresponding reception and / or transmission.

[0399] Furthermore, the terminal device determines whether to use the first pilot signal associated with the first random access signal in subsequent channel transmission based on the fourth information, and indicates whether to use the first pilot signal or not through response information of the fourth information.

[0400] Through this method, the network device can confirm the first pilot signal associated with the first random access signal through the fourth information and the response information of the fourth information, so that the network device and the terminal device can have consistent understanding and provide communication reliability.

[0401] In some embodiments, referring to flowchart diagram 5 of the communication method shown in FIG10C , after the terminal device sends the first information at S110 , the communication method provided in the embodiment of the present application may further include the following steps:

[0402] S120C. The terminal device receives fifth information sent by the network device; the fifth information is used to indicate one or more of the following parameters of the first pilot signal:

[0403] a type of the first pilot signal;

[0404] Power parameters;

[0405] The frequency domain position of the occupied time-frequency resources;

[0406] The time domain location of the occupied time-frequency resources;

[0407] sequence generation methods; and,

[0408] Sequence generation parameters.

[0409] It should be noted that the description of the relevant parameters of the first pilot signal can be understood by referring to the description in the aforementioned embodiment, and for the sake of brevity, they will not be repeated here.

[0410] It should also be noted that the fifth information here may be the first RAR in the above embodiment.

[0411] It is understandable that the above parameters indicated by the fifth information may be a supplement, adjustment, modification, or update of the parameters of the first pilot signal. In other words, the above parameters indicated in the fifth information may be additionally indicated based on the pre-defined parameters or the above-mentioned second information.

[0412] For example, the second information indicates some parameters of the first pilot signal, while other parameters are not indicated. In this case, the network device can further indicate more parameters related to the first pilot signal through the fifth information. Alternatively, the network device can adjust, modify, or update some parameters of the first pilot signal originally indicated in the second information through the fifth information. In this way, the terminal device and the network device can use the first pilot signal to perform corresponding reception or transmission in combination with the parameters indicated by the second information and the parameters indicated by the fifth information. This can increase the flexibility of parameter indication, allowing the network device to optimize the pilot signal reported by the terminal device to a certain extent, thereby improving communication performance.

[0413] In some embodiments, referring to the sixth flow diagram of the communication method shown in FIG10D , after the terminal device sends the first information, the communication method provided in the embodiment of the present application may further include the following steps:

[0414] The terminal device receives sixth information sent by the network device; the sixth information is used to indicate one or more of the following parameters of the second pilot signal:

[0415] a type of the second pilot signal;

[0416] Power parameters;

[0417] The frequency domain position of the occupied time-frequency resources;

[0418] The time domain location of the occupied time-frequency resources;

[0419] sequence generation methods; and,

[0420] Sequence generation parameters.

[0421] It should be noted that the description of the relevant parameters of the second pilot signal can be understood by referring to the description of the first pilot signal in the above embodiment, and for the sake of brevity, they will not be repeated here.

[0422] It should also be noted that the sixth information here may be the first RAR in the above embodiment.

[0423] In the embodiment of the present application, the second pilot signal is different from the first pilot signal in some or all parameters. It is understandable that the network device can comprehensively consider the first pilot signal suggested by the terminal device through the first information and other factors (such as joint scheduling and coexistence with other terminal devices), and from the perspective of the entire system, select a suitable pilot signal (referred to as the second pilot signal in the embodiment of the present application) on its own, and indicate the second pilot signal to the corresponding terminal device through the sixth information.

[0424] In this way, in subsequent transmissions, the terminal device can perform corresponding reception and / or transmission according to the second pilot signal indicated by the sixth information.

[0425] It should be noted that, similar to the first pilot signal, the second pilot signal can be used for one or more of the following downlink data channels, downlink control channels, uplink data channels, and uplink control channels. That is, the terminal device and the network device use the second pilot signal to communicate when subsequently transmitting one or more of the following: the downlink data channel, the downlink control channel, the uplink data channel, and the uplink control channel. The specific channel or channels targeted by the second pilot signal can be determined by pre-defined rules or can also be indicated by the aforementioned sixth information.

[0426] It should also be noted that if the terminal device and the network device have pre-agreed on multiple pilot signals, the network device may carry only the index value / identifier of the second pilot signal in the multiple signals in the sixth information. In other words, the network device may indicate only the second pilot signal among the multiple pilot signals in the sixth information, without carrying the relevant parameters of the second pilot signal.

[0427] In this way, the network can comprehensively consider the first pilot signal recommended by the terminal device and other factors (such as joint scheduling and coexistence with other terminals), and from the perspective of the overall system, select a suitable pilot signal (including the first pilot signal indicated by the first information, or the second pilot signal selected by the network device itself) for the corresponding terminal device, thereby improving the performance of the entire system.

[0428] Thus, through the method provided in the embodiments of the present application, the terminal device can indicate the first pilot signal to the network device by sending a first random access signal in the early stage of the random access process. In this way, the network device and the terminal device can communicate using the optimized pilot signal (including the first pilot signal indicated by the first information, or the second pilot signal selected by the network device) before establishing the RRC connection, thereby improving communication performance and user experience.

[0429] Mode #B: The first information may indicate one or more parameters of the first pilot signal, and the first pilot signal may be indicated by the indicated one or more parameters. In other words, the terminal device may explicitly indicate the first pilot signal through the first information.

[0430] The first information may indicate one or more of the following parameters of the first pilot signal:

[0431] a type of the first pilot signal;

[0432] Power parameters;

[0433] The frequency domain position of the occupied time-frequency resources;

[0434] The time domain location of the occupied time-frequency resources;

[0435] sequence generation methods; and,

[0436] Sequence generation parameters.

[0437] It should be noted that the description of the relevant parameters of the first pilot signal can be understood by referring to the description in the aforementioned embodiment, and for the sake of brevity, they will not be repeated here.

[0438] In some embodiments, the first information may be carried by any one of the following:

[0439] Media Access Control Element (MAC CE) signaling;

[0440] Random access message 3 (Message3, Msg3);

[0441] Random access message A (MessageA, MsgA).

[0442] It should be noted that the MAC CE signaling may be the MAC CE carried in the uplink information during the random access process. For example, the MAC CE may be the MAC CE carried by Msg3 or the MAC CE carried by MsgA. This embodiment of the present application does not impose any restrictions on this.

[0443] It should also be noted that Msg3 may be a signal sent by the terminal device for contention resolution, or Msg3 may be MAC CE signaling for contention resolution (for example, in 5G, it is UE Contention Resolution Identity MAC CE).

[0444] Exemplarily, Msg3 uses a temporary Cell-Radio Network Temporary Identifier (C-RNTI).

[0445] For example, MsgA transmission may be performed using a dedicated RNTI (eg, MSGB-RNTI).

[0446] It should be noted that the first pilot signal can be used for different channels, or in other words, the first pilot signal can be used for different data / control information transmissions.

[0447] Exemplarily, the first pilot signal may be used for one or more of a subsequent downlink data channel, a downlink control channel, an uplink data channel, and an uplink control channel. That is, the terminal device and the network device use the first pilot signal for communication when subsequently transmitting one or more of the downlink data channel, the downlink control channel, the uplink data channel, and the uplink control channel.

[0448] In an embodiment of the present application, the channel or channels to which the first pilot signal is specifically directed can be determined by a predetermined rule, or can be determined by the first information sent by the terminal device to the network device, or the seventh information sent by the network device to the terminal device.

[0449] It should be noted that the use of the first information or the seventh information to determine the signal for which the first pilot signal can be used can be understood by referring to the description in the above embodiment, and for the sake of brevity, it will not be repeated here.

[0450] By using this method, the first pilot signal can be indicated for different channels. In this way, different channels can be distinguished and the best pilot signal can be selected for each channel, thereby improving the performance of each channel.

[0451] In some embodiments, after the S110 terminal device sends the first information (i.e., the terminal device sends one or more parameters indicating the first pilot signal), the terminal device and the network device can perform corresponding reception and / or transmission based on the first pilot signal on a channel where the first pilot signal is available (i.e., one or more of the downlink data channel, downlink control channel, uplink data channel, and uplink control channel mentioned above).

[0452] In some embodiments, referring to the third flow diagram of the communication method shown in FIG10A , after the terminal device sends the first information at S110 , the communication method provided in the embodiment of the present application may further include the following steps:

[0453] S120A. The network device sends third information to the terminal device. Correspondingly, the terminal device receives the third information sent by the network device. The third information is used to confirm the first pilot signal.

[0454] It should be noted that if the first information is Msg3 (or the MAC CE signaling corresponding to Msg3), the third information may be the response information of Msg3 (or the MAC CE signaling corresponding to the response information of Msg3), or Msg4 (or the MAC CE signaling corresponding to Msg4). If the first information is MsgA (or the MAC CE signaling corresponding to MsgA), the third information may be the response information of MsgA (or the MAC CE signaling corresponding to the response information of MsgA), or MsgB (or the MAC CE signaling corresponding to MsgB). This embodiment of the present application does not limit this.

[0455] It is understandable that after receiving the first information, the network device may send third information to the terminal device. The third information may indicate whether to use the first pilot signal associated with the first random access signal in the relevant channel transmission.

[0456] Through this method, the network device can confirm the first pilot signal indicated in the first information through the third information, so that the network device and the terminal device can have a consistent understanding, thereby improving communication reliability.

[0457] In some embodiments, referring to the fourth flow chart of the communication method shown in FIG10B , after the terminal device sends the first information at S110 , the communication method provided in the embodiment of the present application may further include the following steps:

[0458] S120B: The network device sends fourth information to the terminal device, and correspondingly, the terminal device receives the fourth information sent by the network device, wherein the fourth information requests confirmation of whether to use the first pilot signal.

[0459] S130: The terminal device sends response information of the fourth information to the network device, and the network device receives the response information accordingly, wherein the response information is used to indicate whether to use the first pilot signal or not to use the first pilot signal.

[0460] It should be noted that if the first information is Msg3 (or the MAC CE signaling corresponding to Msg3), the fourth information may be the response information of Msg3 (or the MAC CE signaling corresponding to the response information of Msg3), or Msg4 (or the MAC CE signaling corresponding to Msg4). If the first information is MsgA (or the MAC CE signaling corresponding to MsgA), the fourth information may be the response information of MsgA (or the MAC CE signaling corresponding to the response information of MsgA), or MsgB (or the MAC CE signaling corresponding to MsgB). This embodiment of the present application does not limit this.

[0461] Furthermore, the terminal device may determine whether to use the first pilot signal indicated in the first information in subsequent channel transmission based on the fourth information, and indicate whether to use the first pilot signal or not through response information to the fourth information.

[0462] Through this method, the network device can confirm the first pilot signal indicated in the first information through the fourth information and the response information of the fourth information, so that the network device and the terminal device can have a consistent understanding and provide communication reliability.

[0463] In some embodiments, referring to flowchart diagram 5 of the communication method shown in FIG10C , after the terminal device sends the first information at S110 , the communication method provided in the embodiment of the present application may further include the following steps:

[0464] S120C. The terminal device receives fifth information sent by the network device; the fifth information is used to indicate one or more of the following parameters of the first pilot signal:

[0465] a type of the first pilot signal;

[0466] Power parameters;

[0467] The frequency domain position of the occupied time-frequency resources;

[0468] The time domain location of the occupied time-frequency resources;

[0469] sequence generation methods; and,

[0470] Sequence generation parameters.

[0471] It should be noted that the description of the relevant parameters of the first pilot signal can be understood by referring to the description in the aforementioned embodiment, and for the sake of brevity, they will not be repeated here.

[0472] It should also be noted that if the first information is Msg3 (or the MAC CE signaling corresponding to Msg3), the fifth information may be the response information of Msg3 (or the MAC CE signaling corresponding to the response information of Msg3), or Msg4 (or the MAC CE signaling corresponding to Msg4). If the first information is MsgA (or the MAC CE signaling corresponding to MsgA), the fifth information may be the response information of MsgA (or the MAC CE signaling corresponding to the response information of MsgA), or MsgB (or the MAC CE signaling corresponding to MsgB). This embodiment of the present application does not limit this.

[0473] It is understandable that the information content carried by Msg3, MsgA, and MAC CE signaling during the random access process is limited. Therefore, the first information carried by Msg3, MsgA, or MAC CE signaling may only carry some parameters of the first pilot signal. For example, the first information may only indicate the type of the first pilot signal, or the first information may only indicate the power parameter of the first pilot signal.

[0474] In the embodiment of the present application, the network device may supplement, adjust, modify, or update the parameters of the first pilot signal in the fifth information. In other words, the above parameters indicated in the fifth information may be additional to the pre-defined parameters or the parameters indicated in the first information.

[0475] For example, the first information indicates some parameters of the first pilot signal, while other parameters are not indicated. In this case, the network device can further indicate more parameters related to the first pilot signal through the fifth information. Alternatively, the network device can adjust, modify, or update some parameters of the first pilot signal indicated in the second information through the fifth information. In this way, the terminal device and the network device can use the first pilot signal to perform corresponding reception or transmission in combination with the parameters indicated in the first information and the parameters indicated in the fifth information. In this way, the flexibility of parameter indication can be improved, allowing the network device to optimize the pilot signal reported by the terminal device to a certain extent, thereby improving communication performance.

[0476] In some embodiments, referring to the sixth flow diagram of the communication method shown in FIG10D , after the terminal device sends the first information, the communication method provided in the embodiment of the present application may further include the following steps:

[0477] The terminal device receives sixth information sent by the network device; the sixth information is used to indicate one or more of the following parameters of the second pilot signal:

[0478] a type of the second pilot signal;

[0479] Power parameters;

[0480] The frequency domain position of the occupied time-frequency resources;

[0481] The time domain location of the occupied time-frequency resources;

[0482] sequence generation methods; and,

[0483] Sequence generation parameters.

[0484] It should be noted that the description of the relevant parameters of the second pilot signal can be understood by referring to the description of the first pilot signal in the above embodiment, and for the sake of brevity, they will not be repeated here.

[0485] It should also be noted that if the first information is Msg3 (or the MAC CE signaling corresponding to Msg3), the sixth information may be the response information of Msg3 (or the MAC CE signaling corresponding to the response information of Msg3), or Msg4 (or the MAC CE signaling corresponding to Msg4). If the first information is MsgA (or the MAC CE signaling corresponding to MsgA), the sixth information may be the response information of MsgA (or the MAC CE signaling corresponding to the response information of MsgA), or MsgB (or the MAC CE signaling corresponding to MsgB). This embodiment of the present application does not limit this.

[0486] In the embodiment of the present application, the second pilot signal is different from the first pilot signal in some or all parameters. It is understandable that the network device can comprehensively consider the first pilot signal suggested by the terminal device through the first information and other factors (such as joint scheduling and coexistence with other terminal devices), and from the perspective of the entire system, select a suitable pilot signal (referred to as the second pilot signal in the embodiment of the present application) on its own, and indicate the second pilot signal to the corresponding terminal device through the sixth information.

[0487] In this way, in subsequent transmissions, the terminal device can perform corresponding reception and / or transmission according to the second pilot signal indicated by the sixth information.

[0488] It should be noted that, similar to the first pilot signal, the second pilot signal can be used for one or more of the following downlink data channels, downlink control channels, uplink data channels, and uplink control channels. That is, the terminal device and the network device use the second pilot signal to communicate when subsequently transmitting one or more of the following: the downlink data channel, the downlink control channel, the uplink data channel, and the uplink control channel. The specific channel or channels targeted by the second pilot signal can be determined by pre-defined rules or can also be indicated by the aforementioned sixth information.

[0489] It should also be noted that if the terminal device and the network device have pre-agreed on multiple pilot signals, the network device may carry only the index value / identifier of the second pilot signal in the multiple signals in the sixth information. In other words, the network device may indicate only the second pilot signal among the multiple pilot signals in the sixth information, without carrying the relevant parameters of the second pilot signal.

[0490] In this way, the network can comprehensively consider the first pilot signal recommended by the terminal device and other factors (such as joint scheduling and coexistence with other terminals), and from the perspective of the overall system, select a suitable pilot signal (including the first pilot signal indicated by the first information, or the second pilot signal selected by the network device itself) for the corresponding terminal device, thereby improving the performance of the entire system.

[0491] Thus, it can be seen that, through the method provided in the embodiment of the present application, the terminal device can indicate the first pilot signal to the network device through Msg3 and MsgA in the early stage of the random access process. In this way, the network device and the terminal device can communicate using the optimized pilot signal (including the first pilot signal indicated by the first information, or the second pilot signal selected by the network device itself) before establishing the RRC connection, thereby improving communication performance and user experience.

[0492] Mode #C: The first information is used to indicate the first pilot signal among multiple pilot signals; wherein the configuration parameters of the multiple pilot signals are predefined.

[0493] Exemplarily, the first information indicates a first pilot signal among multiple pilot signals. The first information may indicate an index value of the first pilot signal among the multiple pilot signals; or the first information indicates an identifier of the first pilot signal among the multiple pilot signals.

[0494] It is understood that the communication system may predefine configuration parameters for multiple pilot signals. The terminal device may indicate the index value / identifier of the first pilot signal in the first information, so that the network device can determine the configuration parameters of the first pilot signal based on the index value / identifier of the first pilot signal. The predefinement here may be predefinement according to a protocol and / or predefinement by the network via a broadcast message / system message.

[0495] In this embodiment, signaling overhead can be reduced through a predefined manner.

[0496] In some embodiments, the first information may be carried by any one of the following:

[0497] MAC CE signaling;

[0498] Msg3;

[0499] MsgA.

[0500] It should be noted that the above three types of signaling can be understood by referring to the relevant explanations in method #B. For the sake of brevity, they will not be repeated here.

[0501] It should also be noted that the first pilot signal can be used for different channels, or in other words, the first pilot signal can be used for different data / control information transmissions.

[0502] Exemplarily, the first pilot signal may be used for one or more of a subsequent downlink data channel, a downlink control channel, an uplink data channel, and an uplink control channel. That is, the terminal device and the network device use the first pilot signal for communication when subsequently transmitting one or more of the downlink data channel, the downlink control channel, the uplink data channel, and the uplink control channel.

[0503] In an embodiment of the present application, the channel or channels to which the first pilot signal is specifically directed can be determined by a predetermined rule, or can be determined by the first information sent by the terminal device to the network device, or the seventh information sent by the network device to the terminal device.

[0504] It should be noted that the use of the first information or the seventh information to determine the signal for which the first pilot signal can be used can be understood by referring to the description in the above embodiment, and for the sake of brevity, it will not be repeated here.

[0505] By using this method, the first pilot signal can be indicated for different channels. In this way, different channels can be distinguished and the best pilot signal can be selected for each channel, thereby improving the performance of each channel.

[0506] In some embodiments, after the terminal device sends the first information at S110 (i.e., the terminal device sends one or more parameters indicating the first pilot signal), the terminal device and the network device can perform corresponding reception and / or transmission based on the first pilot signal on a channel that can be used by the first pilot signal.

[0507] In some embodiments, referring to the third flow diagram of the communication method shown in FIG10A , after the terminal device sends the first information at S110 , the communication method provided in the embodiment of the present application may further include the following steps:

[0508] S120A. The network device sends third information to the terminal device. Correspondingly, the terminal device receives the third information sent by the network device. The third information is used to confirm the first pilot signal.

[0509] It should be noted that if the first information is Msg3 (or the MAC CE signaling corresponding to Msg3), the third information may be the response information of Msg3 (or the MAC CE signaling corresponding to the response information of Msg3), or Msg4 (or the MAC CE signaling corresponding to Msg4). If the first information is MsgA (or the MAC CE signaling corresponding to MsgA), the third information may be the response information of MsgA (or the MAC CE signaling corresponding to the response information of MsgA), or MsgB (or the MAC CE signaling corresponding to MsgB). This embodiment of the present application does not limit this.

[0510] It is understandable that after receiving the first information, the network device may send third information to the terminal device. The third information may indicate whether to use the first pilot signal associated with the first random access signal in the relevant channel transmission.

[0511] Through this method, the network device can confirm the first pilot signal indicated in the first information through the third information, so that the network device and the terminal device can have a consistent understanding, thereby improving communication reliability.

[0512] In some embodiments, referring to the fourth flow chart of the communication method shown in FIG10B , after the terminal device sends the first information at S110 , the communication method provided in the embodiment of the present application may further include the following steps:

[0513] S120B: The network device sends fourth information to the terminal device, and correspondingly, the terminal device receives the fourth information sent by the network device, wherein the fourth information requests confirmation of whether to use the first pilot signal.

[0514] S130: The terminal device sends response information of the fourth information to the network device, and the network device receives the response information accordingly, wherein the response information is used to indicate whether to use the first pilot signal or not to use the first pilot signal.

[0515] It should be noted that if the first information is Msg3 (or the MAC CE signaling corresponding to Msg3), the fourth information may be the response information of Msg3 (or the MAC CE signaling corresponding to the response information of Msg3), or Msg4 (or the MAC CE signaling corresponding to Msg4). If the first information is MsgA (or the MAC CE signaling corresponding to MsgA), the fourth information may be the response information of MsgA (or the MAC CE signaling corresponding to the response information of MsgA), or MsgB (or the MAC CE signaling corresponding to MsgB). This embodiment of the present application does not limit this.

[0516] Furthermore, the terminal device may determine whether to use the first pilot signal indicated in the first information in subsequent channel transmission based on the fourth information, and indicate whether to use the first pilot signal or not through response information to the fourth information.

[0517] Through this method, the network device can confirm the first pilot signal indicated in the first information through the fourth information and the response information of the fourth information, so that the network device and the terminal device can have a consistent understanding and provide communication reliability.

[0518] In some embodiments, referring to flowchart diagram 5 of the communication method shown in FIG10C , after the terminal device sends the first information at S110 , the communication method provided in the embodiment of the present application may further include the following steps:

[0519] S120C. The terminal device receives fifth information sent by the network device; the fifth information is used to indicate one or more of the following parameters of the first pilot signal:

[0520] a type of the first pilot signal;

[0521] Power parameters;

[0522] The frequency domain position of the occupied time-frequency resources;

[0523] The time domain location of the occupied time-frequency resources;

[0524] sequence generation methods; and,

[0525] Sequence generation parameters.

[0526] It should be noted that the description of the relevant parameters of the first pilot signal can be understood by referring to the description in the aforementioned embodiment, and for the sake of brevity, they will not be repeated here.

[0527] It should also be noted that if the first information is Msg3 (or the MAC CE signaling corresponding to Msg3), the fifth information may be the response information of Msg3 (or the MAC CE signaling corresponding to the response information of Msg3), or Msg4 (or the MAC CE signaling corresponding to Msg4). If the first information is MsgA (or the MAC CE signaling corresponding to MsgA), the fifth information may be the response information of MsgA (or the MAC CE signaling corresponding to the response information of MsgA), or MsgB (or the MAC CE signaling corresponding to MsgB). This embodiment of the present application does not limit this.

[0528] It is understandable that the information content carried by Msg3, MsgA, and MAC CE signaling during the random access process is limited. Therefore, the first information carried by Msg3, MsgA, or MAC CE signaling may only carry some parameters of the first pilot signal. For example, the first information may only indicate the type of the first pilot signal, or the first information may only indicate the power parameter of the first pilot signal, or the first information may only indicate the type and power parameter of the first pilot signal. The first information may also indicate other parameters of the first pilot signal parameters mentioned above.

[0529] In the embodiment of the present application, the network device may supplement, adjust, modify, or update the parameters of the first pilot signal in the fifth information. In other words, the above parameters indicated in the fifth information may be additional to the pre-defined parameters or the parameters indicated in the first information.

[0530] For example, the first information indicates some parameters of the first pilot signal, while other parameters are not indicated. In this case, the network device can further indicate more parameters related to the first pilot signal through the fifth information. Alternatively, the network device can adjust, modify, or update some parameters of the first pilot signal indicated in the second information through the fifth information. In this way, the terminal device and the network device can use the first pilot signal to perform corresponding reception or transmission in combination with the parameters indicated in the first information and the parameters indicated in the fifth information. In this way, the flexibility of parameter indication can be improved, allowing the network device to optimize the pilot signal reported by the terminal device to a certain extent, thereby improving communication performance.

[0531] In some embodiments, referring to the sixth flow diagram of the communication method shown in FIG10D , after the terminal device sends the first information, the communication method provided in the embodiment of the present application may further include the following steps:

[0532] The terminal device receives sixth information sent by the network device; the sixth information is used to indicate one or more of the following parameters of the second pilot signal:

[0533] a type of the second pilot signal;

[0534] Power parameters;

[0535] The frequency domain position of the occupied time-frequency resources;

[0536] The time domain location of the occupied time-frequency resources;

[0537] sequence generation methods; and,

[0538] Sequence generation parameters.

[0539] It should be noted that the description of the relevant parameters of the second pilot signal can be understood by referring to the description of the first pilot signal in the above embodiment, and for the sake of brevity, they will not be repeated here.

[0540] It should also be noted that if the first information is Msg3 (or the MAC CE signaling corresponding to Msg3), the sixth information may be the response information of Msg3 (or the MAC CE signaling corresponding to the response information of Msg3), or Msg4 (or the MAC CE signaling corresponding to Msg4). If the first information is MsgA (or the MAC CE signaling corresponding to MsgA), the sixth information may be the response information of MsgA (or the MAC CE signaling corresponding to the response information of MsgA), or MsgB (or the MAC CE signaling corresponding to MsgB). This embodiment of the present application does not limit this.

[0541] In the embodiment of the present application, the second pilot signal is different from the first pilot signal in some or all parameters. It is understandable that the network device can comprehensively consider the first pilot signal suggested by the terminal device through the first information and other factors (such as joint scheduling and coexistence with other terminal devices), and from the perspective of the entire system, select a suitable pilot signal (referred to as the second pilot signal in the embodiment of the present application) on its own, and indicate the second pilot signal to the corresponding terminal device through the sixth information.

[0542] In this way, in subsequent transmissions, the terminal device can perform corresponding reception and / or transmission according to the pilot signal indicated by the Xth information.

[0543] It should be noted that, similar to the first pilot signal, the second pilot signal can be used for one or more of the following downlink data channels, downlink control channels, uplink data channels, and uplink control channels. That is, the terminal device and the network device use the second pilot signal to communicate when subsequently transmitting one or more of the following: the downlink data channel, the downlink control channel, the uplink data channel, and the uplink control channel. The specific channel or channels targeted by the second pilot signal can be determined by pre-defined rules or can also be indicated by the aforementioned sixth information.

[0544] It should also be noted that if the terminal device and the network device have pre-agreed on multiple pilot signals, the network device may carry only the index value / identifier of the second pilot signal in the multiple signals in the sixth information. In other words, the network device may indicate only the second pilot signal among the multiple pilot signals in the sixth information, without carrying the relevant parameters of the second pilot signal.

[0545] In this way, the network can comprehensively consider the first pilot signal recommended by the terminal device and other factors (such as joint scheduling and coexistence with other terminals), and from the perspective of the overall system, select a suitable pilot signal (including the first pilot signal indicated by the first information, or the second pilot signal selected by the network device itself) for the corresponding terminal device, thereby improving the performance of the entire system.

[0546] Thus, it can be seen that, through the method provided in the embodiment of the present application, the terminal device can indicate the first pilot signal to the network device through Msg3 and MsgA in the early stage of the random access process. In this way, the network device and the terminal device can communicate using the optimized pilot signal (including the first pilot signal indicated by the first information, or the second pilot signal selected by the network device itself) before establishing the RRC connection, thereby improving communication performance and user experience.

[0547] In an embodiment of the present application, the communication method provided in the embodiment of the present application may further include the following steps:

[0548] The terminal device sends capability information to the network device, and the network device can receive the capability information sent by the terminal device. The capability information indicates that the terminal device supports a first type of pilot signal, which refers to a pilot signal that uses at least part of the time-frequency resources to transmit data signals.

[0549] It should be noted that, in a dual-connection or CA scenario, the terminal device may also send capability information to the network device before sending the first information to the network device.

[0550] It is understandable that during the random access process, because the information transmitted between the terminal device and the network device is limited, the network device and the terminal device reach an agreement on some information, some parameters, or some optional values ​​of some parameters. By reporting capability information by the terminal device, more capabilities that the terminal device can support can be reported on the basis of the above embodiment, for example, more information, more parameters, or more optional values ​​of some parameters, etc.

[0551] The terminal device may send the capability information to the network device via RRC signaling or MAC CE signaling.

[0552] In some embodiments, the capability information is a capability for any of the following:

[0553] frequency band;

[0554] Band Combination;

[0555] Each band in the band combination;

[0556] Each carrier on each band in the band combination;

[0557] Frequency Range (FR);

[0558] The terminal device.

[0559] It should be noted that capability information can be frequency band-specific. That is, for different frequency bands (Per Band), the terminal device can independently report the corresponding capability information. Based on this, the terminal device can have greater freedom. For example, the terminal device can support reporting corresponding capability information on one or some frequency bands, but not support reporting corresponding capability information on other frequency bands, thereby allowing more terminal devices to report supported capability information.

[0560] It should also be noted that capability information can be specific to a frequency band combination. That is, for different frequency band combinations, the terminal device can independently report the corresponding capability information (Per Band Combination). This allows for greater freedom for the terminal device. For example, the terminal device may support reporting capability information for one or more frequency band combinations, but not for other frequency band combinations. This allows more terminal devices to support reporting capability information.

[0561] It should also be noted that the capability information can be for each frequency band in the frequency band combination. That is, for each frequency band in different frequency band combinations (Per Band Per Band Combination), the terminal device can independently report the corresponding capability information. Based on this, terminal devices can have greater freedom. For example, a terminal device may not support reporting corresponding capability information in a certain CA combination, but support reporting corresponding capability information in certain frequency bands in another CA combination, thereby enabling more terminal devices to support reporting corresponding capability information.

[0562] It should also be noted that the capability information can be the capability of each carrier on each frequency band in the frequency band combination, that is, for different component carriers (CC) in the frequency bands of different frequency band combinations (Per CC Per Band Per Band Combination), the terminal device can independently report the corresponding capability information. Based on this, the terminal device can have greater freedom. For example, different frequency band combinations can independently report corresponding capability information, and different carriers on a frequency band can also independently report corresponding capability information, so that more terminal devices can support reporting corresponding capability information.

[0563] It should also be noted that capability information can be specific to FR. That is, for different FRs (per FR), terminal devices can independently report corresponding capability information. This allows terminal devices greater flexibility. For example, if there are two FRs, namely low-frequency FR (i.e., FR1) and high-frequency FR (i.e., FR2), FR1 may not support reporting corresponding capability information, while FR2 does. This allows more terminal devices to support reporting corresponding capability information.

[0564] It should also be noted that the capability information may be for the terminal device. Based on this, when the terminal device reports the capability information, it can be assumed that the terminal device can support reporting capability information on all frequency bands, thereby reducing the signaling overhead of the terminal device's capability reporting.

[0565] In summary, through the communication method provided in the embodiments of the present application, a terminal device can indicate a selected first pilot signal to a network device via first information. In this way, the network device can determine a pilot signal suitable for the terminal device based on the first information (including the first pilot signal indicated by the first information, or a second pilot signal selected by the network device itself), thereby communicating with the terminal device based on this pilot signal and improving transmission performance.

[0566] The communication method provided in the embodiment of the present application is described in detail below in conjunction with specific application scenarios.

[0567] In the method provided in the embodiment of the present application, the terminal device can recommend a better DMRS to the network device during the random access process, so that the network device can adopt the optimized DMRS scheme in advance, thereby improving the communication performance of the terminal device during the random access process and after accessing the network device (before entering the RRC connection state), and improving the user experience.

[0568] The following describes the invention through three specific embodiments.

[0569] Example 1

[0570] In the first embodiment, the terminal device may indicate the DMRS to the network device via RACH. The first embodiment may include the following steps:

[0571] S1. A network device sends first indication information to a terminal device, wherein the first indication information indicates two or more different RACH signal groups, each RACH signal group corresponding to a different DMRS.

[0572] It should be noted that the first indication information in the first embodiment may be the second information in the above embodiment.

[0573] For example, the first indication information indicates two or more RACH signal groups, which may mean that the network device indicates two or more different RACH signal groups (or two or more different RACH signals) for each synchronization signal in one or more synchronization signals. It can be understood that in the communication system, for each synchronization signal (such as SSB in 5G), there is a corresponding RACH configuration. Taking synchronization signal A as an example, it corresponds to A_RACH. In this embodiment, for synchronization signal A, two different RACH signal groups can be configured, recorded as RACH_Set1 and RACH_Set2. That is to say, the RACH signals corresponding to RACH_Set1 and RACH_Set2 both belong to A_RACH (that is, both are associated with synchronization signal A). In addition, RACH_Set1 and RACH_Set2 can be associated with two different DMRSs respectively.

[0574] For another example, the network device indicating two or more RACH signal groups may mean that the network device indicates different RACH signal groups for two or more synchronization signals. Taking two synchronization signals as an example (denoted as A and B respectively), the network device may indicate a random access signal group RACH_SetA for synchronization signal A and a random access signal group RACH_SetA for synchronization signal B. These two different RACH signal groups correspond to different DMRSs.

[0575] In some embodiments, RACH signals in different RACH signal groups among the two or more RACH signal groups may differ in one or more of the following parameters, or correspond to different parameters (in this case, the parameters may be predefined):

[0576] signal sequence;

[0577] signal root sequence;

[0578] generating parameters used by the signal sequence;

[0579] Time domain resources;

[0580] Frequency domain resources;

[0581] RACH occasion;

[0582] preamble; and,

[0583] preamble format.

[0584] In some embodiments, the DMRS corresponding to each of the aforementioned RACH signal groups may be for different channels or different data / control information transmissions.

[0585] For example, the DMRS may be a DMRS for subsequent downlink control channel transmission (e.g., a DMRS in a PDCCH), or may be a DMRS for subsequent downlink data channel transmission (e.g., a DMRS in a PDSCH), or may be a DMRS for subsequent downlink data channel transmission and a DMRS for subsequent downlink control channel transmission (e.g., a DMRS in a PDSCH and a DMRS in a PDCCH).

[0586] For example, the DMRS may be a DMRS for subsequent uplink control channel transmission (e.g., a DMRS in a PUCCH), or may be a DMRS for subsequent uplink data channel transmission (e.g., a DMRS in a PUSCH), or may be a DMRS for subsequent uplink data channel transmission and a DMRS for subsequent uplink control channel transmission (e.g., a DMRS in a PUSCH and a DMRS in a PUCCH).

[0587] For another example, the DMRS may be a DMRS for subsequent downlink and uplink control channel transmission (e.g., DMRS in PDCCH and DMRS in PUCCH), or, it may be a DMRS for subsequent downlink and uplink data channel transmission (e.g., DMRS in PDSCH and DMRS in PUSCH), or, it may be a DMRS for subsequent downlink and uplink data channel transmission and a DMRS for subsequent downlink and uplink control channel transmission (e.g., DMRS in PDSCH, DMRS in PUSCH, DMRS in PDCCH and DMRS in PUCCH).

[0588] In some embodiments, the channel or channels for which the DMRS is specifically targeted may be determined by predefined rules.

[0589] In some embodiments, the channel or channels that the DMRS is specifically targeted for may be indicated by first indication information. For example, the first indication information may include one or more first fields, and different values ​​in the first fields indicate which channel or channels the DMRS is specifically targeted for.

[0590] By using this method, the first pilot signal can be indicated for different channels. In this way, different channels can be distinguished and the best pilot signal can be selected for each channel, thereby improving the performance of each channel.

[0591] In some embodiments, the first indication information is transmitted via first signaling. The first signaling may be implemented by one or more of the following message / signaling combinations:

[0592] Broadcast message MIB;

[0593] System message SIB;

[0594] Dedicated signaling;

[0595] RRC signaling.

[0596] For example, the first indication information is indicated by a broadcast message MIB. For another example, the first indication information is indicated by a system message. For another example, the first indication information is indicated by a broadcast message MIB and a system message. Other examples and combinations are not listed one by one, and can be directly generalized.

[0597] It should be noted that the same signaling / message may also be used as an indication by multiple signaling / messages of the same type. For example, the first indication information may correspond to multiple system messages, that is, different information in the first indication information is indicated by different system messages.

[0598] Each RACH signal group corresponds to a different DMRS. Assuming there are multiple different DMRSs, take M=2 DMRSs as an example, which are respectively recorded as the first DMRS and the second DMRS. The first DMRS and the second DMRS can be easily extended to more different DMRSs, and will not be described in detail.

[0599] In a possible implementation, the first DMRS and the second DMRS are orthogonal DMRSs, that is, the first DMRS and the second DMRS both belong to the first type of pilot signal mentioned above.

[0600] As will be appreciated, the REs for the first DMRS do not overlap with those used by data signals, meaning that the first DMRS uses different REs than the data signals. Furthermore, the REs for the second DMRS do not overlap with those used by data signals, meaning that the second DMRS uses different REs than the data signals. By configuring orthogonal DMRSs, system complexity can be reduced by avoiding the introduction of new DMRSs.

[0601] It should be noted that the first DMRS and the second DMRS are different, wherein one or more of the following parameters of the first DMRS and the second DMRS are different:

[0602] Power parameters;

[0603] The time domain location of the occupied time-frequency resources;

[0604] The frequency domain position of the occupied time-frequency resources;

[0605] A method for generating a sequence of a pilot signal; and

[0606] Sequence generation parameters.

[0607] The network device may indicate the DMRS corresponding to the RACH signal group in different ways.

[0608] Exemplarily, parameters related to the first DMRS and the second DMRS are predefined, and the first indication information may indicate whether different RACH signal groups correspond to the first DMRS or the second DMRS. For example, the first indication information includes one or more second fields, and the second fields may be associated with different RACH signal groups. Different values ​​of the second fields indicate whether the associated RACH signal group corresponds to the first DMRS or the second DMRS.

[0609] Exemplarily, the first DMRS-related parameters are predefined, that is, the first DMRS is the default DMRS. The first indication information may indicate one or more parameters of the second DMRS. For example, the first indication information includes one or more third fields, and the third fields may be associated with different RACH signal groups. If the third field is configured, the third field may indicate the parameters of the second DMRS corresponding to the associated RACH signal group; if the third field is not configured, the corresponding RACH signal group corresponds to the first DMRS (i.e., the default DMRS). This has the advantage that, if the default DMRS is indicated, the signaling overhead can be reduced, while also providing sufficient flexibility to configure the second DMRS.

[0610] Exemplarily, the first indication information indicates one or more parameters of the first DMRS and one or more parameters of the second DMRS. For example, the first indication information may include one or more fourth fields, which may be associated with different RACH signal groups. The fourth fields may be used to indicate the parameters of the first DMRS / second DMRS corresponding to the associated RACH signal group. This allows for flexible configuration of each DMRS, providing room for system optimization.

[0611] In another possible implementation, the first DMRS is a non-orthogonal DMRS, and the second DMRS is an orthogonal DMRS. That is, the first DMRS belongs to the second type of pilot signal mentioned above, and the second DMRS belongs to the first type of pilot signal mentioned above. It is understood that a terminal device can use non-orthogonal DMRS to share the same REs with data signals, allowing the data signals to use more REs, thereby increasing the transmission rate or improving transmission reliability.

[0612] In this implementation, the network device may also use multiple methods to indicate the DMRSs corresponding to different RACH signal groups.

[0613] Exemplarily, parameters related to the first DMRS and the second DMRS are predefined, and the first indication information can indicate whether different RACH signal groups correspond to the first DMRS or the second DMRS. For example, the first indication information contains one or more fifth fields, and different values ​​are used to indicate the DMRS corresponding to the RACH signal group. The DMRS corresponding to the RACH signal group can also be indicated by whether the fifth field is configured. For example, when the fifth field is not configured, it indicates that the RACH signal group corresponds to the second DMRS, and when the fifth field is configured, it indicates that the RACH signal group corresponds to the first DMRS; or, when the fifth field is not configured, it indicates that the RACH signal group corresponds to the first DMRS, and when the fifth field is configured, it indicates that the RACH signal group corresponds to the second DMRS. This method can reduce signaling overhead by predefining the relevant parameters of the DMRS.

[0614] For example, parameters related to the first DMRS are predefined, i.e., the first DMRS is the default DMRS; the first indication information indicates one or more parameters of the second DMRS. For example, the first indication information includes one or more sixth fields, which indicate the parameters of the second DMRS. If the sixth field is not configured, the corresponding RACH signal group corresponds to the first DMRS (i.e., the default DMRS). This approach can reduce signaling overhead when the first indication information indicates the default DMRS, while also providing sufficient flexibility to configure another DMRS.

[0615] For example, the second DMRS-related configuration / parameters are pre-specified, i.e., the second DMRS is the default DMRS; the first indication information indicates one or more parameters of the first DMRS. For example, the first indication information may include one or more seventh fields, which indicate the parameters of the first DMRS. If the seventh field is not configured, the corresponding RACH signal group corresponds to the second DMRS (i.e., the default DMRS). This approach can reduce signaling overhead when the first indication information indicates the default DMRS, while also providing sufficient flexibility to configure another DMRS.

[0616] Exemplarily, the first indication information indicates one or more parameters of the first DMRS and one or more parameters of the second DMRS. For example, the first indication information contains one or more eighth fields, and the eighth field is used to indicate the parameters of the first DMRS / second DMRS. For another example, the first indication information indicates whether it is the first DMRS or the second DMRS by configuring different fields through the CHOICE structure. These two different fields in the CHOICE structure are recorded as the ninth field and the tenth field. When the ninth field is configured, it is used to indicate the first DMRS, and when the tenth field is configured, it is used to indicate the second DMRS. This method can flexibly configure each DMRS, providing optimization space for the system.

[0617] It should be noted that each RACH signal group in S1 corresponds to a different DMRS. Therefore, there may be more than two DMRSs. Taking three DMRSs as an example, two of them can be orthogonal and one can be non-orthogonal. Other numbers of DMRSs can be expanded and are not detailed here.

[0618] It should also be noted that, for a non-orthogonal first DMRS, since the REs of the first DMRS can also be used to transmit data signals simultaneously, a specific receiver is required to demodulate the data signal transmitted on the same RE.

[0619] Exemplarily, the receiver here may be an iterative receiver, an AI / ML receiver, etc., which is not limited in the embodiments of the present application.

[0620] It should be noted that the receiver can use various algorithms such as deep learning. For example, the receiver can use one or a combination of fully convolutional neural networks (FCN), convolutional neural networks (CNN), recurrent neural networks (RNN), and transformer neural network architectures.

[0621] It should be understood that the premise of using a receiver to demodulate the data signal is that the terminal device needs to know the relevant parameters of the first DMRS, otherwise it will cause the receiver to adapt to the actual received data signal, resulting in performance degradation.

[0622] Exemplarily, the related parameters of the first DMRS may include one or more of the following:

[0623] Power parameters;

[0624] The frequency domain position of the occupied time-frequency resources;

[0625] The time domain location of the occupied time-frequency resources;

[0626] sequence generation methods; and,

[0627] Sequence generation parameters.

[0628] In some embodiments, the first indication information indicates a power parameter of the first DMRS, or the power parameter of the first DMRS is pre-defined (eg, pre-defined by a protocol, or pre-defined by network broadcast information, etc.).

[0629] It can be understood that if the power parameter of the first DMRS is indicated by the first indication information, then the network device can flexibly indicate the power allocation of the DMRS, so that the system can optimize the DMRS transmission power according to the wireless environment and provide system performance; if the power parameter of the first DMRS is pre-determined, then signaling overhead can be saved.

[0630] In some embodiments, for a non-orthogonal first DMRS, the power parameter of the first DMRS may be one or more of the following:

[0631] The ratio of the power of the first DMRS transmitted on a shared RE to the total power on the shared RE (i.e., the total power of the DMRS and data);

[0632] The ratio of the power of the data signal transmitted on a shared RE to the total power on the shared RE (i.e., the total power of the DMRS and data);

[0633] A ratio of the power of the first DMRS transmitted on a shared RE to the data power on the shared RE;

[0634] The ratio of the power of the data signal transmitted on a shared RE to the power of the first DMRS on the shared RE;

[0635] The ratio of the power transmitted by the first DMRS to the total power on an RE (ie, regardless of whether the RE is shared).

[0636] It should be noted that the above ratio can be a linear value or a dB value. For example, a linear value of 0.1 corresponds to a dB value of -10dB or 10dB.

[0637] In some embodiments, the first indication information indicates the frequency domain resource location of the first DMRS, or the frequency domain resource location of the first DMRS is pre-specified (e.g., pre-specified by a protocol, or pre-specified by network broadcast information, etc.). By indicating the frequency domain resource location of the first DMRS through the first indication information, the frequency domain resource location of the first DMRS can be flexibly changed, thereby better facilitating multi-user multiplexing and reducing DMRS interference between users.

[0638] Exemplarily, the first indication information may indicate the density of the frequency domain corresponding to the first DMRS (eg, indicating how many REs are occupied in one RB), and / or the offset value of the first DMRS in the frequency domain (eg, RE offset value).

[0639] Exemplarily, the first indication information may indicate which frequency domain resources are occupied by the first DMRS by means of a bitmap or by directly indicating identifiers of frequency domain resources (eg, RE, RB).

[0640] For example, the first indication information may indicate a frequency domain pattern to be used by the first DMRS from among multiple candidate frequency domain patterns. The candidate frequency domain patterns are determined by pre-defined rules and / or network configuration. Each frequency domain pattern may identify which resources in the frequency domain may be used for the first DMRS. Taking Figures 8 and 9 as an example, two frequency domain patterns are pre-defined, and the first indication information may indicate which frequency domain pattern to use.

[0641] Exemplarily, the frequency domain pattern of FIG. 9 is predefined, and as long as the first indication information indicates the first DMRS, the frequency domain pattern shown in FIG. 9 is adopted.

[0642] In some embodiments, the first indication information may indicate the time domain resource location of the first DMRS, or the time domain resource location of the first DMRS may be pre-specified (e.g., pre-specified by a protocol, or pre-specified by network broadcast information, etc.). By indicating the time domain resource location of the first DMRS through the first indication information, the time domain density and / or time domain resource location of the first DMRS may be flexibly changed, thereby achieving a good trade-off between performance and complexity.

[0643] Exemplarily, the first indication information indicates the time domain density of the first DMRS, that is, indicates that the first DMRS is transmitted on one symbol in every Z symbols.

[0644] Exemplarily, the first indication information may indicate which symbols (eg, which symbols in a slot) are used by the first DMRS by means of a bitmap or by directly indicating the symbol numbers.

[0645] Exemplarily, the first indication information may indicate which time domain pattern to use for the first DMRS from among multiple candidate time domain patterns. The candidate time domain patterns are determined by pre-defined rules and / or network configuration. Each time domain pattern may identify which symbols carry the first DMRS. This approach can reduce signaling overhead.

[0646] In some embodiments, the first indication information may indicate a first DMRS sequence generation parameter, or the first DMRS sequence generation parameter is pre-defined (eg, pre-defined by a protocol, or pre-defined by network broadcast information, etc.).

[0647] Exemplarily, the sequence generation parameters of the first DMRS may include one or more of the following:

[0648] An identifier of a time domain resource in the time-frequency resources occupied by the first DMRS;

[0649] The identifier of the system frame number (SNF) where the first DMRS is located;

[0650] an identifier of the cell where the first DMRS is located;

[0651] An identifier of a carrier where the first DMRS is located;

[0652] an identifier of a port of the first DMRS;

[0653] Scrambling parameters of the first DMRS;

[0654] an identification of a control channel for scheduling data signals; and,

[0655] Other parameters for network configuration.

[0656] S2. The terminal device selects a RACH from at least two configured RACH signal groups based on the first indication information, and sends the selected RACH to the network device.

[0657] It should be noted that the RACH in the first embodiment may be the first information in the above embodiment.

[0658] As will be appreciated, the RACH signal group is associated with the DMRS. The terminal device can select the most compatible DMRS (herein referred to as the third DMRS) based on one or more of the types of DMRS it supports, the wireless channel environment between it and the network device, and the speed measurement results. Furthermore, the terminal device selects a random access signal in the RACH signal group associated with the third DMRS and sends the random access signal to the network device. In this way, the network device can determine that the most compatible DMRS is the third DMRS associated with the RACH signal group based on the random access signal sent by the terminal device.

[0659] It should be noted that the third DMRS may be the first DMRS or the second DMRS in S1.

[0660] Furthermore, the terminal device and the network device may perform any one of the following steps.

[0661] S3A (Option 1), when the terminal device receives the RAR (referred to as the first RAR) corresponding to the random access signal, it receives it according to the third DMRS.

[0662] It should be noted that receiving the first RAR may include receiving the PDSCH that transmits the first RAR, or receiving the PDCCH that schedules the PDSCH that schedules the first RAR, or receiving the PDSCH that transmits the first RAR and the PDCCH that schedules the PDSCH.

[0663] S3B (Option 2): The network device sends a RAR corresponding to the random access signal (referred to as the first RAR), where the first RAR may indicate one or more of the following parameters:

[0664] Power parameter corresponding to the third DMRS;

[0665] The frequency domain position of the time-frequency resource occupied by the third DMRS;

[0666] The time domain position of the time-frequency resources occupied by the third DMRS;

[0667] A method for generating a sequence corresponding to the third DMRS; and

[0668] Sequence generation parameters corresponding to the third DMRS

[0669] It is understandable that the above parameters indicated in the first RAR may be a supplement or update to the indicated parameters of the third DMRS. In other words, the above parameters indicated in the first RAR may be additionally indicated based on the predefined parameters or the first indication information.

[0670] For example, if the first indication information indicates some parameters of the third DMRS but does not indicate other parameters, the network device can further indicate more parameters related to the third DMRS through the first RAR. Alternatively, the network device can update some of the parameters originally indicated in the first indication information. This can increase the flexibility of parameter indication, allowing the network device to optimize the pilot signal reported by the terminal device to a certain extent, thereby improving communication performance.

[0671] In S3C (Option 3), the network device sends the RAR corresponding to the random access signal (referred to as the first RAR), where the first RAR indicates confirmation information for the third DMRS. For example, the first RAR contains a message indicating the use of the third DMRS. In subsequent transmissions, the first terminal device can perform corresponding reception and / or transmission based on the third DMRS. Compared with Option 1, the network device can confirm the third DMRS associated with the RACH signal group through the first RAR, so that the network device and the terminal device can understand each other and provide communication reliability.

[0672] S3D (Option 4), the network device sends the RAR corresponding to the random access signal (referred to as the first RAR), where the first RAR instructs the terminal to send confirmation information (for example, confirming the use of the third DMRS), and then the terminal device sends the confirmation information. In subsequent transmissions, the first terminal device can perform corresponding reception and / or transmission based on the third DMRS. Compared with Option 1, the network device can confirm the third DMRS associated with the RACH signal group through the first RAR, so that the network device and the terminal device can understand each other and provide communication reliability.

[0673] Thus, in the first embodiment, the terminal device can indicate the matching third DMRS to the network device by sending a random access signal in the early stage of the random access process. In this way, the network device and the terminal device can communicate using the optimized pilot signal before establishing the RRC connection, thereby improving communication performance and user experience.

[0674] Example 2

[0675] In the second embodiment, the terminal device may indicate the DMRS to the network device via Msg3 or MsgA. The second embodiment may include the following steps:

[0676] S1. A terminal device sends first reporting information to a network device, wherein the first reporting information is used to indicate a fourth DMRS.

[0677] The first reporting information may indicate one or more parameters of the fourth DMRS.

[0678] Exemplarily, the first reporting information may indicate one or more of the following parameters of the fourth DMRS:

[0679] The type of the fourth DMRS;

[0680] a power parameter corresponding to the fourth DMRS;

[0681] The frequency domain position of the time-frequency resources occupied by the fourth DMRS;

[0682] The time domain position of the time-frequency resources occupied by the fourth DMRS;

[0683] A method for generating a sequence corresponding to a fourth DMRS; and

[0684] Sequence generation parameters corresponding to the fourth DMRS.

[0685] In some embodiments, the REs of the fourth DMRS do not overlap with the REs used by the data signal, that is, the fourth DMRS uses different REs from the data signal (denoted as the fifth DMRS). It can be understood that the use of orthogonal DMRS avoids introducing new DMRSs and reduces system complexity.

[0686] In some embodiments, one or more or all REs of the fourth DMRS are also REs used by data signals (ie, shared REs) (denoted as the sixth DMRS). Using non-orthogonal DMRS can allow data signals to use more REs, increase transmission rate, or improve transmission reliability.

[0687] It should be noted that the first reported information in Example 2 is the first information mentioned above.

[0688] It should also be noted that the terminal device can select the most matching DMRS (referred to as the fourth DMRS here) based on the type of DMRS it supports, the wireless channel environment between it and the network device, and one or more of the speed measurement results, and report the fourth DMRS to the network device through the first reporting information.

[0689] It should be noted that the fourth DMRS may be for different channels or different data / control information transmission.

[0690] For example, the fourth DMRS may be a DMRS for subsequent downlink control channel transmission (e.g., a DMRS in a PDCCH), or may be a DMRS for subsequent downlink data channel transmission (e.g., a DMRS in a PDSCH), or may be a DMRS for subsequent downlink data channel transmission and a DMRS for subsequent downlink control channel transmission (e.g., a DMRS in a PDSCH and a DMRS in a PDCCH).

[0691] For example, the fourth DMRS may be a DMRS for subsequent uplink control channel transmission (e.g., a DMRS in PUCCH), or it may be a DMRS for subsequent uplink data channel transmission (e.g., a DMRS in PUSCH), or it may be a DMRS for subsequent uplink data channel transmission and a DMRS for subsequent uplink control channel transmission (e.g., a DMRS in PUSCH and a DMRS in PUCCH).

[0692] For another example, the fourth DMRS may be a DMRS for subsequent downlink and uplink control channel transmissions (e.g., DMRS in PDCCH and DMRS in PUCCH), or, it may be a DMRS for subsequent downlink and uplink data channel transmissions (e.g., DMRS in PDSCH and DMRS in PUSCH), or, it may be a DMRS for subsequent downlink and uplink data channel transmissions and a DMRS for subsequent downlink and uplink control channel transmissions (e.g., DMRS in PDSCH, DMRS in PUSCH, DMRS in PDCCH and DMRS in PUCCH).

[0693] In some embodiments, the channel or channels specifically targeted by the fourth DMRS may be determined by a predefined rule.

[0694] In some embodiments, the channel or channels that the fourth DMRS is specifically targeted for may be indicated by the first reporting information. For example, the first reporting information may include one or more eleventh fields, which indicate the channel or channels that the fourth DMRS is specifically targeted for through different values.

[0695] It is understandable that the first pilot signal may be indicated for different channels. In this way, different channels are distinguished and the best pilot signal is selected for each channel, thereby improving the performance of each channel.

[0696] In some embodiments, the first reporting information may be carried by any one of the following:

[0697] MAC CE signaling, Msg3, and MsgA.

[0698] S2. The network device sends second indication information to the terminal device, where the second indication information is used to indicate a fourth DMRS.

[0699] Exemplarily, the second indication information may indicate one or more of the following parameters of the fourth DMRS:

[0700] The type of the fourth DMRS;

[0701] a power parameter corresponding to the fourth DMRS;

[0702] The frequency domain position of the time-frequency resources occupied by the fourth DMRS;

[0703] The time domain position of the time-frequency resources occupied by the fourth DMRS;

[0704] A method for generating a sequence corresponding to a fourth DMRS; and

[0705] Sequence generation parameters corresponding to the fourth DMRS.

[0706] It should be noted that the information content carried by Msg3, MsgA, and MAC CE signaling during the random access process is limited. Therefore, the first reporting information carried by Msg3, MsgA, or MAC CE signaling may only carry some parameters of the fourth DMRS. For example, the first reporting information may only indicate the type of the fourth DMRS or the power parameters of the fourth DMRS.

[0707] In this embodiment of the present application, the network device may supplement or update the parameters of the fourth DMRS through the second indication information. That is, the parameters indicated in the second indication information may be additionally indicated based on the pre-defined parameters, one or more of the above parameters, or the first information indication.

[0708] For example, if the first reporting information indicates some parameters of the fourth DMRS but does not indicate other parameters, the network device may further indicate more parameters related to the fourth DMRS through the second indication information, or update some of the parameters indicated in the original first indication information. This improves the flexibility of parameter indication, allowing the network device to optimize the pilot signal reported by the terminal device to a certain extent, thereby improving communication performance.

[0709] S3. The first terminal device uses the corresponding fourth DMRS to receive and / or send data according to the second indication information.

[0710] Thus, through the method provided in the embodiments of the present application, the terminal device can indicate the first pilot signal to the network device through Msg3 and MsgA in the early stages of the random access process. In this way, the network device and the terminal device can communicate using the optimized pilot signal before establishing an RRC connection, thereby improving communication performance and user experience.

[0711] Example 3

[0712] In the third embodiment, the terminal device may indicate the DMRS to the network device via Msg3 or MsgA. The third embodiment may include the following steps:

[0713] S1. A terminal device sends first reporting information to a network device, wherein the first reporting information is used to indicate a fourth DMRS.

[0714] It should be noted that both the network device and the terminal device may predefine multiple configurations related to the fourth DMRS, and the first reporting information may indicate which one to use. For example, the first reporting information may only carry the index value / identifier of the fourth DMRS.

[0715] It should be noted that the first reported information in Example 2 is the first information mentioned above.

[0716] It should also be noted that the terminal device can select the most matching DMRS (referred to as the fourth DMRS here) based on one or more of the types of DMRS it supports, the wireless channel environment between it and the network device, and the speed measurement results. The index value of the fourth DMRS is indicated by the first reporting information.

[0717] In some embodiments, the REs of the fourth DMRS do not overlap with the REs used by the data signal, that is, the fourth DMRS uses different REs from the data signal (denoted as the fifth DMRS). It can be understood that the use of orthogonal DMRS avoids introducing new DMRSs and reduces system complexity.

[0718] In some embodiments, one or more or all REs of the fourth DMRS are also REs used by data signals (ie, shared REs) (denoted as the sixth DMRS). Using non-orthogonal DMRS can allow data signals to use more REs, increase transmission rate, or improve transmission reliability.

[0719] It should be noted that the fourth DMRS may be for different channels or different data / control information transmission.

[0720] For example, the fourth DMRS may be a DMRS for subsequent downlink control channel transmission (e.g., a DMRS in a PDCCH), or may be a DMRS for subsequent downlink data channel transmission (e.g., a DMRS in a PDSCH), or may be a DMRS for subsequent downlink data channel transmission and a DMRS for subsequent downlink control channel transmission (e.g., a DMRS in a PDSCH and a DMRS in a PDCCH).

[0721] For example, the fourth DMRS may be a DMRS for subsequent uplink control channel transmission (e.g., a DMRS in PUCCH), or it may be a DMRS for subsequent uplink data channel transmission (e.g., a DMRS in PUSCH), or it may be a DMRS for subsequent uplink data channel transmission and a DMRS for subsequent uplink control channel transmission (e.g., a DMRS in PUSCH and a DMRS in PUCCH).

[0722] For another example, the fourth DMRS may be a DMRS for subsequent downlink and uplink control channel transmissions (e.g., DMRS in PDCCH and DMRS in PUCCH), or, it may be a DMRS for subsequent downlink and uplink data channel transmissions (e.g., DMRS in PDSCH and DMRS in PUSCH), or, it may be a DMRS for subsequent downlink and uplink data channel transmissions and a DMRS for subsequent downlink and uplink control channel transmissions (e.g., DMRS in PDSCH, DMRS in PUSCH, DMRS in PDCCH and DMRS in PUCCH).

[0723] In some embodiments, the channel or channels specifically targeted by the fourth DMRS may be determined by a predefined rule.

[0724] In some embodiments, the channel or channels that the fourth DMRS is specifically targeted for may be indicated by the first reporting information. For example, the first reporting information may include one or more eleventh fields, which indicate the channel or channels that the fourth DMRS is specifically targeted for through different values.

[0725] It is understandable that the first pilot signal may be indicated for different channels. In this way, different channels are distinguished and the best pilot signal is selected for each channel, thereby improving the performance of each channel.

[0726] In some embodiments, the first reporting information may be carried by any one of the following:

[0727] MAC CE signaling, Msg3, MsgA.

[0728] Furthermore, the terminal device and the network device may perform any one of the following steps.

[0729] S2A (Option 1), the terminal device receives according to the fourth DMRS on an available channel (ie, one or more of the downlink data channel, downlink control channel, uplink data channel, and uplink control channel mentioned above).

[0730] S2B (Option 2): The network device sends third indication information to the terminal device, where the third indication information may indicate one or more of the following parameters:

[0731] a power parameter corresponding to the fourth DMRS;

[0732] The frequency domain position of the time-frequency resources occupied by the fourth DMRS;

[0733] The time domain position of the time-frequency resources occupied by the fourth DMRS;

[0734] A method for generating a sequence corresponding to a fourth DMRS; and

[0735] Sequence generation parameters corresponding to the fourth DMRS

[0736] It is understandable that the above parameters indicated in the third indication information may be a supplement or update to the indicated parameters of the fourth DMRS. In other words, the above parameters indicated in the third indication information may be additionally indicated based on the parameters pre-defined in S1.

[0737] Exemplarily, some parameters of the fourth DMRS may be pre-specified, and if other parameters are unspecified, the network device may further indicate more parameters related to the fourth DMRS through the third indication information, or update some of the pre-specified parameters of the fourth DMRS. This can increase the flexibility of parameter indication, allowing the network device to optimize the pilot signal reported by the terminal device to a certain extent, thereby improving communication performance.

[0738] In S2C (Option 3), the network device sends a third indication message, indicating the use of the fourth DMRS. In subsequent transmissions, the first terminal device can receive and / or transmit accordingly based on the fourth DMRS. Compared to Option 1, the network device can confirm the use of the fourth DMRS using the third indication message, ensuring consistent understanding between the network device and the terminal device, improving communication reliability.

[0739] In S2D (Option 4), the network device sends a third indication message, which instructs the terminal to send confirmation information (for example, confirming the use of the fourth DMRS). The terminal device then sends the confirmation message. In subsequent transmissions, the terminal device can perform corresponding reception and / or transmission based on the fourth DMRS. Compared with Option 1, the network device can confirm the fourth DMRS through the third indication message, so that the network device and the terminal device can understand each other and improve communication reliability.

[0740] Thus, through the method provided in the embodiment of the present application, the terminal device can indicate the first pilot signal to the network device through Msg3 and MsgA in the early stage of the random access process. In this way, the network device and the terminal device can communicate using the optimized pilot signal before establishing the RRC connection, thereby improving communication performance and user experience.

[0741] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, the technical solution of the present application can be subjected to a variety of simple modifications, and these simple modifications all fall within the scope of protection of the present application. For example, the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present application will no longer describe the various possible combinations separately. For another example, the various different embodiments of the present application can also be arbitrarily combined, as long as they do not violate the idea of ​​the present application, they should also be regarded as the contents disclosed in the present application. For another example, under the premise of no conflict, the various embodiments and / or the technical features in each embodiment described in the present application can be arbitrarily combined with the prior art, and the technical solution obtained after the combination should also fall within the scope of protection of the present application.

[0742] It should also be understood that in the various method embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0743] FIG11 is a schematic diagram of the structure of a communication device 1100 provided in an embodiment of the present application, which is applied to a terminal device. As shown in FIG11 , the communication device 1100 may include:

[0744] The first sending unit 1110 is configured to send first information to the network device, where the first information is used to indicate a first pilot signal.

[0745] In some embodiments, the first pilot signal is a first type pilot signal or a second type pilot signal; wherein, the first type pilot signal refers to a pilot signal whose occupied time-frequency resources are not used to transmit data signals, and the second type pilot signal refers to a pilot signal whose occupied time-frequency resources are at least part of the time-frequency resources used to transmit data signals.

[0746] In some embodiments, the first information is transmitted via a first random access signal; wherein the first random access signal is associated with a pilot signal; and the first pilot signal is a pilot signal associated with the first random access signal.

[0747] In some embodiments, the communication device 1100 further includes a first receiving unit 1120. The first receiving unit 1120 is configured to receive second information sent by the network device; the second information is used to configure multiple random access signal groups; the multiple different random access signal groups are associated with different pilot signals;

[0748] The first random access signal is any random access signal of a random access signal group associated with the first pilot signal in the multiple random access signal groups.

[0749] In some embodiments, the plurality of random access signal groups maintain different configurations in one or more of the following parameters:

[0750] signal sequence;

[0751] signal root sequence;

[0752] generating parameters used by the signal sequence;

[0753] Time domain resources;

[0754] Frequency domain resources;

[0755] RACH timing;

[0756] preamble; and,

[0757] Preamble format.

[0758] In some embodiments, the second information is carried by one or more of the following signaling:

[0759] Broadcast messages;

[0760] System messages;

[0761] Dedicated signaling; and,

[0762] RRC signaling.

[0763] In some embodiments, the second information is further used to indicate one or more of the following parameters of the first pilot signal; or, the one or more of the following parameters of the first pilot signal are predefined:

[0764] a type of the first pilot signal;

[0765] Power parameters;

[0766] The frequency domain position of the occupied time-frequency resources;

[0767] The time domain location of the occupied time-frequency resources;

[0768] sequence generation methods; and,

[0769] Sequence generation parameters;

[0770] The type includes a first type of pilot signal or a second type of pilot signal; wherein the first type of pilot signal refers to a pilot signal whose occupied time-frequency resources are not used to transmit data signals, and the second type of pilot signal refers to a pilot signal whose occupied time-frequency resources are at least part of the time-frequency resources used to transmit data signals.

[0771] In some embodiments, the first information is further used to indicate one or more of the following parameters of the first pilot signal:

[0772] a type of the first pilot signal;

[0773] Power parameters;

[0774] The frequency domain position of the occupied time-frequency resources;

[0775] The time domain location of the occupied time-frequency resources;

[0776] sequence generation methods; and,

[0777] Sequence generation parameters.

[0778] In some embodiments, the first information is used to indicate the first pilot signal among a plurality of pilot signals; configuration parameters of the plurality of pilot signals are predefined.

[0779] In some embodiments, the first information is carried by any one of the following:

[0780] Media Access Control Element MAC CE signaling;

[0781] Random access message 3;

[0782] Random access message A.

[0783] In some embodiments, the first receiving unit 1120 is further configured to receive third information sent by the network device; the third information is used to confirm the first pilot signal.

[0784] In some embodiments, the first receiving unit 1120 is further configured to receive fourth information sent by the network device, where the fourth information requests confirmation of whether to use the first pilot signal.

[0785] In some embodiments, the first sending unit 1110 is further configured to send response information of the fourth information to the network device, where the response information is used to indicate whether to use the first pilot signal or not to use the first pilot signal.

[0786] In some embodiments, the first receiving unit 1120 is further configured to receive fifth information sent by the network device; the fifth information is used to indicate one or more of the following parameters of the first pilot signal:

[0787] a type of the first pilot signal;

[0788] Power parameters;

[0789] The frequency domain position of the occupied time-frequency resources;

[0790] The time domain location of the occupied time-frequency resources;

[0791] sequence generation methods; and,

[0792] Sequence generation parameters.

[0793] In some embodiments, the first receiving unit 1120 is further configured to receive sixth information sent by the network device; the sixth information is used to indicate one or more of the following parameters of the second pilot signal:

[0794] a type of the second pilot signal;

[0795] Power parameters;

[0796] The frequency domain position of the occupied time-frequency resources;

[0797] The time domain location of the occupied time-frequency resources;

[0798] sequence generation methods; and,

[0799] Sequence generation parameters;

[0800] Part of or all of the parameters of the second pilot signal are different from those of the first pilot signal.

[0801] In some embodiments, the first pilot signal and / or the second pilot signal is used for one or more of the following channels:

[0802] Downlink data channel;

[0803] Downlink control channel;

[0804] an uplink data channel; and

[0805] Uplink control channel.

[0806] In some embodiments, when the first information is a first random access signal, the downlink data channel used by the first pilot signal includes a PDSCH for transmitting a first random access response RAR, and the downlink control channel used by the first pilot signal includes a PDCCH for scheduling the PDSCH of the first RAR; the first RAR is the response information of the first random access signal.

[0807] In some embodiments, the channel used by the first pilot signal is determined based on one or more of the following:

[0808] pre-determined rules;

[0809] the first information;

[0810] second information sent by the network device;

[0811] The seventh information sent by the network device.

[0812] In some embodiments, when the first pilot signal is a second-type pilot signal, the power parameter of the first pilot signal includes one or more of the following:

[0813] a ratio of the power of the first pilot signal sent on the first time-frequency resource to the total power on the second time-frequency resource;

[0814] a ratio of the power of the data signal sent on the first time-frequency resource to the total power on the second time-frequency resource;

[0815] a ratio of the power of the first pilot signal sent on the first time-frequency resource to the power of the data signal sent on the first time-frequency resource; and

[0816] a ratio of the power of the data signal sent on the first time-frequency resource to the power of the first pilot signal sent on the first time-frequency resource;

[0817] The first time-frequency resource is any one of the at least part of the time-frequency resources; the second time-frequency resource is any one of the at least part of the time-frequency resources, or the second time-frequency resource is any one of the other time-frequency resources except the at least part of the time-frequency resources.

[0818] In some embodiments, the frequency domain position is determined based on one or more of the following:

[0819] Frequency domain density;

[0820] frequency domain offset value; and,

[0821] Frequency domain pattern.

[0822] In some embodiments, the indicating the frequency domain position of the time-frequency resource occupied by the first pilot signal includes:

[0823] Indicating the frequency domain position by a first bitmap; and / or,

[0824] The frequency domain position is indicated by an identifier of the frequency domain resource.

[0825] In some embodiments, the temporal location is determined based on one or more of the following:

[0826] Time domain density;

[0827] A time domain offset value; and,

[0828] Time domain pattern.

[0829] In some embodiments, the indicating the time domain position of the time-frequency resources occupied by the first pilot signal includes:

[0830] Indicating the time domain position by a second bitmap; and / or,

[0831] The time domain location is indicated by an identifier of a time domain resource.

[0832] In some embodiments, the sequence generation parameters of the first pilot signal include one or more of the following:

[0833] an identifier of a time domain resource in the time-frequency resources occupied by the first pilot signal;

[0834] an identifier of a system frame number in which the first pilot signal resides;

[0835] an identifier of a cell where the first pilot signal is located;

[0836] an identifier of the carrier where the first pilot signal is located;

[0837] an identifier of a port of the first pilot signal;

[0838] a scrambling parameter of the first pilot signal; and

[0839] An identifier of a control channel of the data signal.

[0840] In some embodiments, the first sending unit 1110 is further configured to send capability information to the network device, wherein the capability information indicates that the terminal device supports a first type of pilot signal, and the first type of pilot signal refers to a pilot signal that uses at least part of the time-frequency resources to transmit data signals.

[0841] In some embodiments, the capability information is a capability for any of the following objects:

[0842] frequency band;

[0843] frequency band combination;

[0844] Each band in the band combination;

[0845] Each carrier on each band in the band combination;

[0846] Frequency band range;

[0847] The terminal device.

[0848] Those skilled in the art should understand that the relevant description of the above-mentioned communication device in the embodiment of the present application can be understood with reference to the relevant description of the communication method in the embodiment of the present application.

[0849] FIG12 is a schematic diagram of the structure of a communication device 1200 provided in an embodiment of the present application, which is applied to a network device. As shown in FIG12 , the communication device 1200 may include:

[0850] The second receiving unit 1210 is configured to receive first information sent by the terminal device, where the first information is used to indicate a first pilot signal.

[0851] In some embodiments, the first pilot signal is a first type pilot signal or a second type pilot signal; wherein, the first type pilot signal refers to a pilot signal whose occupied time-frequency resources are not used to transmit data signals, and the second type pilot signal refers to a pilot signal whose occupied time-frequency resources are at least part of the time-frequency resources used to transmit data signals.

[0852] In some embodiments, the first information is transmitted via a first random access signal; wherein the first random access signal is associated with a pilot signal; and the first pilot signal is a pilot signal associated with the first random access signal.

[0853] In some embodiments, the communication device 1200 further includes a second sending unit 1220. The second sending unit 1220 is configured to send second information to the terminal device; the second information is used to configure multiple random access signal groups; different random access signal groups are associated with different pilot signals;

[0854] The first random access signal is any random access signal of a random access signal group associated with the first pilot signal in the multiple random access signal groups.

[0855] In some embodiments, the plurality of random access signals maintain different configurations in one or more of the following parameters:

[0856] signal sequence;

[0857] signal root sequence;

[0858] generating parameters used by the signal sequence;

[0859] Time domain resources;

[0860] Frequency domain resources;

[0861] RACH timing;

[0862] preamble; and,

[0863] Preamble format.

[0864] In some embodiments, the second information is carried by one or more of the following signaling:

[0865] Broadcast messages;

[0866] System messages;

[0867] Dedicated signaling; and,

[0868] Radio Resource Control (RRC) signaling.

[0869] In some embodiments, the second information is further used to indicate one or more of the following parameters of the first pilot signal; or, the one or more of the following parameters of the first pilot signal are predefined:

[0870] a type of the first pilot signal;

[0871] Power parameters;

[0872] The frequency domain position of the occupied time-frequency resources;

[0873] The time domain location of the occupied time-frequency resources;

[0874] sequence generation methods; and,

[0875] Sequence generation parameters;

[0876] The type includes a first type of pilot signal or a second type of pilot signal; wherein the first type of pilot signal refers to a pilot signal whose occupied time-frequency resources are not used to transmit data signals, and the second type of pilot signal refers to a pilot signal whose occupied time-frequency resources are at least part of the time-frequency resources used to transmit data signals.

[0877] In some embodiments, the first information is further used to indicate one or more of the following parameters of the first pilot signal:

[0878] a type of the first pilot signal;

[0879] Power parameters;

[0880] The frequency domain position of the occupied time-frequency resources;

[0881] The time domain location of the occupied time-frequency resources;

[0882] sequence generation methods; and,

[0883] Sequence generation parameters.

[0884] In some embodiments, the first information is used to indicate the first pilot signal among a plurality of pilot signals; configuration parameters of the plurality of pilot signals are predefined.

[0885] In some embodiments, the first information is carried by any one of the following:

[0886] Media Access Control Element MAC CE signaling;

[0887] Random access message 3;

[0888] Random access message A.

[0889] In some embodiments, the second sending unit 1220 is further configured to send third information to the terminal device; the third information is used to confirm the first pilot signal.

[0890] In some embodiments, the second sending unit 1220 is further configured to send fourth information to the terminal device, wherein the fourth information requests confirmation of whether to use the first pilot signal.

[0891] In some embodiments, the second receiving unit 1210 is further configured to receive response information of the fourth information sent by the terminal device, where the response information is used to indicate whether to use the first pilot signal or not to use the first pilot signal.

[0892] In some embodiments, the second sending unit 1220 is further configured to send fifth information to the terminal device; the fifth information is used to indicate one or more of the following parameters of the first pilot signal:

[0893] a type of the first pilot signal;

[0894] Power parameters;

[0895] The frequency domain position of the occupied time-frequency resources;

[0896] The time domain location of the occupied time-frequency resources;

[0897] sequence generation methods; and,

[0898] Sequence generation parameters.

[0899] In some embodiments, the second sending unit 1220 is further configured to send sixth information to the terminal device; the sixth information is used to indicate one or more of the following parameters of the second pilot signal:

[0900] a type of the second pilot signal;

[0901] Power parameters;

[0902] The frequency domain position of the occupied time-frequency resources;

[0903] The time domain location of the occupied time-frequency resources;

[0904] sequence generation methods; and,

[0905] Sequence generation parameters;

[0906] Part of or all of the parameters of the second pilot signal are different from those of the first pilot signal.

[0907] In some embodiments, the first pilot signal and / or the second pilot signal is used for one or more of the following channels:

[0908] Downlink data channel;

[0909] Downlink control channel;

[0910] an uplink data channel; and

[0911] Uplink control channel.

[0912] In some embodiments, when the first information is a first random access signal, the downlink data channel used by the first pilot signal includes a PDSCH for transmitting a first RAR, and the downlink control channel used by the first pilot signal includes a PDCCH for scheduling the PDSCH of the first RAR; the first RAR is response information of the first random access signal.

[0913] In some embodiments, the channel used by the first pilot signal is determined based on one or more of the following:

[0914] pre-determined rules;

[0915] the first information;

[0916] Second information;

[0917] The seventh information sent by the network device.

[0918] In some embodiments, when the first pilot signal is a second-type pilot signal, the power parameter of the first pilot signal includes one or more of the following:

[0919] a ratio of the power of the first pilot signal sent on the first time-frequency resource to the total power on the second time-frequency resource;

[0920] a ratio of the power of the data signal sent on the first time-frequency resource to the total power on the second time-frequency resource;

[0921] a ratio of the power of the first pilot signal sent on the first time-frequency resource to the power of the data signal sent on the first time-frequency resource; and

[0922] a ratio of the power of the data signal sent on the first time-frequency resource to the power of the first pilot signal sent on the first time-frequency resource;

[0923] The first time-frequency resource is any one of the at least part of the time-frequency resources; the second time-frequency resource is any one of the at least part of the time-frequency resources, or the second time-frequency resource is any one of the other time-frequency resources except the at least part of the time-frequency resources.

[0924] In some embodiments, the frequency domain location includes one or more of the following:

[0925] Frequency domain density;

[0926] frequency domain offset value; and,

[0927] Frequency domain pattern.

[0928] In some embodiments, the indicating the frequency domain position of the time-frequency resource occupied by the first pilot signal includes:

[0929] Indicating the frequency domain position by a first bitmap; and / or,

[0930] The frequency domain position is indicated by an identifier of the frequency domain resource.

[0931] In some embodiments, the temporal location includes one or more of the following:

[0932] Time domain density;

[0933] A time domain offset value; and,

[0934] Time domain pattern.

[0935] In some embodiments, the indicating the time domain position of the time-frequency resources occupied by the first pilot signal includes:

[0936] Indicating the time domain position by a second bitmap; and / or,

[0937] The time domain location is indicated by an identifier of a time domain resource.

[0938] In some embodiments, the sequence generation parameters of the first pilot signal include one or more of the following:

[0939] an identifier of a time domain resource in the time-frequency resources occupied by the first pilot signal;

[0940] an identifier of a system frame number in which the first pilot signal resides;

[0941] an identifier of a cell where the first pilot signal is located;

[0942] an identifier of the carrier where the first pilot signal is located;

[0943] an identifier of a port of the first pilot signal;

[0944] a scrambling parameter of the first pilot signal; and

[0945] An identifier of a control channel of the data signal.

[0946] In some embodiments, the second receiving unit 1210 is further configured to receive capability information sent by the terminal device, wherein the capability information indicates that the terminal device supports a first type of pilot signal, and the first type of pilot signal refers to a pilot signal that uses at least part of the time-frequency resources to transmit data signals.

[0947] In some embodiments, the capability information is a capability for any of the following objects:

[0948] frequency band;

[0949] frequency band combination;

[0950] Each band in the band combination;

[0951] Each carrier on each band in the band combination;

[0952] Frequency band range;

[0953] The terminal device.

[0954] Those skilled in the art should understand that the relevant description of the above-mentioned communication device in the embodiment of the present application can be understood with reference to the relevant description of the communication method in the embodiment of the present application.

[0955] FIG13 is a schematic structural diagram of a communication device provided in an embodiment of the present application. The communication device 1300 may be a terminal device or a network device. The communication device 1300 shown in FIG13 may include a processor 1310 and a memory 1320, wherein:

[0956] The memory 1320 may be used to store computer-executable instructions;

[0957] The processor 1310 is connected to the memory 1320 and is configured to implement the method in the embodiment of the present application by executing computer-executable instructions.

[0958] The memory 1320 may be a separate device from the processor 1310 , or may be integrated into the processor 1310 .

[0959] In some embodiments, as shown in FIG13 , the communication device 1300 may further include a transceiver 1330 , and the processor 1310 may control the transceiver 1330 to communicate with other devices. Specifically, the transceiver 1330 may send information or data to other devices, or receive information or data sent by other devices.

[0960] The transceiver 1330 may include a transmitter and a receiver. The transceiver 1330 may further include an antenna, and the number of antennas may be one or more.

[0961] In some embodiments, the communication device 1300 may be a terminal device of an embodiment of the present application, and the communication device 1300 may implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0962] In some embodiments, the communication device 1300 may be a network device of an embodiment of the present application, and the communication device 1300 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0963] FIG14 is a schematic structural diagram of a chip provided in an embodiment of the present application. The chip 1400 shown in FIG14 includes a processor 1410 and a memory 1420, wherein:

[0964] The processor 1410 can call and run a computer program from the memory 1420, so that the device equipped with the chip executes the method in the embodiment of the present application.

[0965] The memory 1420 may be a separate device independent of the processor 1410 , or may be integrated into the processor 1410 .

[0966] In some embodiments, the chip 1400 may further include an input interface 1430. The processor 1410 may control the input interface 1430 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0967] In some embodiments, the chip 1400 may further include an output interface 1440. The processor 1410 may control the output interface 1440 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0968] In some embodiments, the chip can be applied to the terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0969] In some embodiments, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0970] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0971] FIG15 is a schematic block diagram of a communication system according to an embodiment of the present application. As shown in FIG15 , the communication system 1500 includes a terminal device 1510 and a network device 1520 .

[0972] Among them, the terminal device 1510 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1520 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, they will not be repeated here.

[0973] It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment can be completed by hardware integrated logic circuits in the processor or software instructions. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0974] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0975] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0976] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by at least one processor, the method in the embodiment of the present application is implemented.

[0977] In some embodiments, the computer-readable storage medium can be applied to the terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0978] In some embodiments, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0979] An embodiment of the present application also provides a computer program product, which includes a computer storage medium, the computer storage medium storing a computer program, and the computer program including instructions that can be executed by at least one processor. When the instructions are executed by at least one processor, the method in the embodiment of the present application is implemented.

[0980] In some embodiments, the computer program product can be applied to the terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0981] In some embodiments, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0982] The embodiments of the present application also provide a computer program, which enables a computer to execute the method in the embodiments of the present application.

[0983] In some embodiments, the computer program can be applied to the terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0984] In some embodiments, the computer program can be applied to the network device in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0985] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0986] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0987] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0988] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0989] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0990] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, 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 enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0991] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A communication method, the method comprising: The terminal device sends first information to the network device, where the first information is used to indicate a first pilot signal.

2. The method according to claim 1, wherein: The first pilot signal is a first type of pilot signal or a second type of pilot signal; wherein the first type of pilot signal refers to a pilot signal whose occupied time-frequency resources are not used to transmit data signals, and the second type of pilot signal refers to a pilot signal whose occupied time-frequency resources are at least part of the time-frequency resources used to transmit data signals.

3. The method according to claim 1 or 2, wherein: The first information is transmitted via a first random access signal; wherein the first random access signal is associated with a pilot signal; and the first pilot signal is a pilot signal associated with the first random access signal.

4. The method according to claim 3, wherein: Also includes: The terminal device receives the second information sent by the network device; The second information is used to configure multiple random access signal groups; Different random access signal groups are associated with different pilot signals; The first random access signal is any random access signal of a random access signal group associated with the first pilot signal in the multiple random access signal groups.

5. The method according to claim 4, wherein: The plurality of random access signal groups maintain different configurations in one or more of the following parameters: signal sequence; signal root sequence; generating parameters used by the signal sequence; Time domain resources; Frequency domain resources; RACH timing; a preamble; and, Preamble format.

6. The method according to claim 4 or 5, wherein: The second information is carried by one or more of the following signalings: Broadcast messages; System messages; Dedicated signaling; and, Radio Resource Control (RRC) signaling.

7. The method according to any one of claims 4 to 6, wherein: The second information is further used to indicate one or more of the following parameters of the first pilot signal; or, one or more of the following parameters of the first pilot signal are predefined: a type of the first pilot signal; Power parameters; The frequency domain position of the occupied time-frequency resources; The time domain location of the occupied time-frequency resources; sequence generation methods; and, Sequence generation parameters; The type includes a first type of pilot signal or a second type of pilot signal; wherein the first type of pilot signal refers to a pilot signal whose occupied time-frequency resources are not used to transmit data signals, and the second type of pilot signal refers to a pilot signal whose occupied time-frequency resources are at least part of the time-frequency resources used to transmit data signals.

8. The method according to claim 1 or 2, wherein: The first information is further used to indicate one or more of the following parameters of the first pilot signal; a type of the first pilot signal; Power parameters; The frequency domain position of the occupied time-frequency resources; The time domain location of the occupied time-frequency resources; sequence generation methods; and, Sequence generation parameters; The type includes a first type of pilot signal or a second type of pilot signal; wherein the first type of pilot signal refers to a pilot signal whose occupied time-frequency resources are not used to transmit data signals, and the second type of pilot signal refers to a pilot signal whose occupied time-frequency resources are at least part of the time-frequency resources used to transmit data signals.

9. The method according to claim 1 or 2, wherein: The first information is used to indicate the first pilot signal among multiple pilot signals; configuration parameters of the multiple pilot signals are predefined.

10. The method according to claim 8 or 9, wherein: The first information is carried by any one of the following: Media Access Control Element MAC CE signaling; Random access message 3; Random access message A.

11. The method according to any one of claims 1 to 10, wherein: Also includes: The terminal device receives the third information sent by the network device; The third information is used to confirm the first pilot signal.

12. The method according to any one of claims 1 to 10, wherein: Also includes: The terminal device receives fourth information sent by the network device, and the fourth information requests confirmation whether to use the first pilot signal.

13. The method according to claim 12, wherein: Also includes: The terminal device sends response information of the fourth information to the network device, where the response information is used to indicate whether to use the first pilot signal or not to use the first pilot signal.

14. The method according to any one of claims 1 to 13, wherein: Also includes: The terminal device receives fifth information sent by the network device; the fifth information is used to indicate one or more of the following parameters of the first pilot signal: a type of the first pilot signal; Power parameters; The frequency domain position of the occupied time-frequency resources; The time domain location of the occupied time-frequency resources; sequence generation methods; and, Sequence generation parameters; The type includes a first type of pilot signal or a second type of pilot signal; wherein the first type of pilot signal refers to a pilot signal whose occupied time-frequency resources are not used to transmit data signals, and the second type of pilot signal refers to a pilot signal whose occupied time-frequency resources are at least part of the time-frequency resources used to transmit data signals.

15. The method according to any one of claims 1 to 13, wherein: Also includes: The terminal device receives sixth information sent by the network device; The sixth information is used to indicate one or more of the following parameters of the second pilot signal: a type of the second pilot signal; Power parameters; The frequency domain position of the occupied time-frequency resources; The time domain location of the occupied time-frequency resources; sequence generation methods; and, Sequence generation parameters; The second pilot signal has some or all parameters different from those of the first pilot signal; the type includes a first type pilot signal or a second type pilot signal; the first type pilot signal refers to a pilot signal whose occupied time-frequency resources are not used to transmit data signals, and the second type pilot signal refers to a pilot signal whose occupied time-frequency resources are at least part of the time-frequency resources used to transmit data signals.

16. The method according to any one of claims 1 to 15, wherein: The first pilot signal and / or the second pilot signal is used for one or more of the following channels: Downlink data channel; Downlink control channel; an uplink data channel; and, Uplink control channel.

17. The method according to claim 16, wherein: In the case where the first information is transmitted via a first random access signal, the downlink data channel for which the first pilot signal is used includes a PDSCH for transmitting a first random access response RAR, and the downlink control channel for which the first pilot signal is used includes a PDCCH for scheduling the PDSCH for the first RAR; the first RAR is response information to the first random access signal.

18. The method according to claim 16 or 17, wherein: The channel used by the first pilot signal is determined based on one or more of the following: pre-specified rules; the first information; second information sent by the network device; The seventh information sent by the network device.

19. The method according to any one of claims 7, 8 or 14, wherein: In the case where the first pilot signal is a second-type pilot signal, the power parameter of the first pilot signal includes one or more of the following: a ratio of power of the first pilot signal sent on the first time-frequency resource to total power on the second time-frequency resource; a ratio of the power of the data signal sent on the first time-frequency resource to the total power on the second time-frequency resource; a ratio of power of the first pilot signal sent on the first time-frequency resource to power of the data signal sent on the first time-frequency resource; as well as, a ratio of power of the data signal sent on the first time-frequency resource to power of the first pilot signal sent on the first time-frequency resource; The first time-frequency resource is any one of the at least part of the time-frequency resources; the second time-frequency resource is any one of the at least part of the time-frequency resources, or the second time-frequency resource is any one of the other time-frequency resources except the at least part of the time-frequency resources.

20. The method according to any one of claims 7, 8 or 14, wherein: The frequency domain position is determined based on one or more of the following: Frequency domain density; A frequency domain offset value; and, Frequency domain pattern.

21. The method according to any one of claims 7, 8 or 14, wherein: The indicating the frequency domain position of the time-frequency resources occupied by the first pilot signal includes: Indicating the frequency domain position by a first bitmap; and / or, The frequency domain position is indicated by an identifier of the frequency domain resource.

22. The method according to any one of claims 7, 8 or 14, wherein: The temporal position is determined based on one or more of the following: Time domain density; A time domain offset value; and, Time domain pattern.

23. The method according to any one of claims 7, 8 or 14, wherein: The indicating the time domain position of the time-frequency resources occupied by the first pilot signal includes: Indicating the time domain position by a second bitmap; and / or, The time domain position is indicated by an identifier of a time domain resource.

24. The method according to any one of claims 7, 8 or 14, wherein: The sequence generation parameters of the first pilot signal include one or more of the following: An identifier of a time domain resource in the time-frequency resource occupied by the first pilot signal; An identifier of a system frame number in which the first pilot signal resides; An identifier of a cell where the first pilot signal is located; An identifier of a carrier where the first pilot signal is located; an identifier of a port of the first pilot signal; a scrambling parameter of the first pilot signal; and An identifier of a control channel of the data signal.

25. The method according to any one of claims 1 to 24, wherein: The method further comprises: The terminal device sends capability information to the network device, where the capability information indicates that the terminal device supports a first type of pilot signal, where the first type of pilot signal refers to a pilot signal in which at least part of the time-frequency resources are used to transmit data signals.

26. The method according to claim 25, wherein: The capability information is for any of the following objects: Frequency band; Frequency band combination; Each band in the band combination; Each carrier on each band in the band combination; Frequency band range; The terminal device.

27. A communication method, the method comprising: The network device receives first information sent by the terminal device, where the first information is used to indicate a first pilot signal.

28. The method according to claim 27, wherein: The first pilot signal is a first type of pilot signal or a second type of pilot signal; wherein the first type of pilot signal refers to a pilot signal whose occupied time-frequency resources are not used to transmit data signals, and the second type of pilot signal refers to a pilot signal whose occupied time-frequency resources are at least part of the time-frequency resources used to transmit data signals.

29. The method according to claim 27 or 28, wherein: The first information is transmitted via a first random access signal; wherein the first random access signal is associated with a pilot signal; and the first pilot signal is a pilot signal associated with the first random access signal.

30. The method of claim 29, wherein: Also includes: The network device sends second information to the terminal device; The second information is used to configure multiple random access signal groups; Different random access signal groups are associated with different pilot signals; The first random access signal is any random access signal of a random access signal group associated with the first pilot signal in the multiple random access signal groups.

31. The method according to claim 30, wherein: The plurality of random access signal groups maintain different configurations in one or more of the following parameters: signal sequence; signal root sequence; generating parameters used by the signal sequence; Time domain resources; Frequency domain resources; RACH timing; a preamble; and, Preamble format.

32. The method according to claim 30 or 31, wherein: The second information is carried by one or more of the following signalings: Broadcast messages; System messages; Dedicated signaling; and, Radio Resource Control (RRC) signaling.

33. The method according to any one of claims 30 to 32, wherein: The second information is further used to indicate one or more of the following parameters of the first pilot signal; or, one or more of the following parameters of the first pilot signal are predefined: a type of the first pilot signal; Power parameters; The frequency domain position of the occupied time-frequency resources; The time domain location of the occupied time-frequency resources; sequence generation methods; and, Sequence generation parameters; The type includes a first type of pilot signal or a second type of pilot signal; wherein the first type of pilot signal refers to a pilot signal whose occupied time-frequency resources are not used to transmit data signals, and the second type of pilot signal refers to a pilot signal whose occupied time-frequency resources are at least part of the time-frequency resources used to transmit data signals.

34. The method according to claim 27 or 28, wherein: The first information is further used to indicate one or more of the following parameters of the first pilot signal; a type of the first pilot signal; Power parameters; The frequency domain position of the occupied time-frequency resources; The time domain location of the occupied time-frequency resources; sequence generation methods; and, Sequence generation parameters; The type includes a first type of pilot signal or a second type of pilot signal; wherein the first type of pilot signal refers to a pilot signal whose occupied time-frequency resources are not used to transmit data signals, and the second type of pilot signal refers to a pilot signal whose occupied time-frequency resources are at least part of the time-frequency resources used to transmit data signals.

35. The method according to claim 27 or 28, wherein: The first information is used to indicate the first pilot signal among multiple pilot signals; configuration parameters of the multiple pilot signals are predefined.

36. The method according to claim 34 or 35, wherein: The first information is carried by any one of the following: Media Access Control Element MAC CE signaling; Random access message 3; Random access message A.

37. The method according to any one of claims 27 to 36, wherein: Also includes: The network device sends third information to the terminal device; The third information is used to confirm the first pilot signal.

38. The method according to any one of claims 27 to 36, wherein: Also includes: The network device sends fourth information to the terminal device, and the fourth information requests confirmation whether to use the first pilot signal.

39. The method of claim 38, wherein: Also includes: The network device receives response information of the fourth information sent by the terminal device, where the response information is used to indicate whether to use the first pilot signal or not to use the first pilot signal.

40. The method according to any one of claims 27 to 39, wherein: Also includes: The network device sends fifth information to the terminal device; The fifth information is used to indicate one or more of the following parameters of the first pilot signal: a type of the first pilot signal; Power parameters; The frequency domain position of the occupied time-frequency resources; The time domain location of the occupied time-frequency resources; sequence generation methods; and, Sequence generation parameters; The type includes a first type of pilot signal or a second type of pilot signal; wherein the first type of pilot signal refers to a pilot signal whose occupied time-frequency resources are not used to transmit data signals, and the second type of pilot signal refers to a pilot signal whose occupied time-frequency resources are at least part of the time-frequency resources used to transmit data signals.

41. The method according to any one of claims 27 to 39, wherein: Also includes: The network device sends sixth information to the terminal device; The sixth information is used to indicate one or more of the following parameters of the second pilot signal: a type of the second pilot signal; Power parameters; The frequency domain position of the occupied time-frequency resources; The time domain location of the occupied time-frequency resources; sequence generation methods; and, Sequence generation parameters; The second pilot signal has some or all parameters different from those of the first pilot signal; the type includes a first type pilot signal or a second type pilot signal; the first type pilot signal refers to a pilot signal whose occupied time-frequency resources are not used to transmit data signals, and the second type pilot signal refers to a pilot signal whose occupied time-frequency resources are at least part of the time-frequency resources used to transmit data signals.

42. The method according to any one of claims 27 to 41, wherein: The first pilot signal and / or the second pilot signal is used for one or more of the following channels: Downlink data channel; Downlink control channel; an uplink data channel; and, Uplink control channel.

43. The method of claim 42, wherein: In the case where the first information is transmitted via a first random access signal, the downlink data channel for which the first pilot signal is used includes a PDSCH for transmitting a first random access response RAR, and the downlink control channel for which the first pilot signal is used includes a PDCCH for scheduling the PDSCH for the first RAR; the first RAR is response information to the first random access signal.

44. The method according to claim 42 or 43, wherein: The channel used by the first pilot signal is determined based on one or more of the following: pre-specified rules; the first information; Second information: The seventh information sent by the network device.

45. The method according to any one of claims 33, 34 or 40, wherein: In the case where the first pilot signal is a second-type pilot signal, the power parameter of the first pilot signal includes one or more of the following: a ratio of power of the first pilot signal sent on the first time-frequency resource to total power on the second time-frequency resource; a ratio of the power of the data signal sent on the first time-frequency resource to the total power on the second time-frequency resource; a ratio of power of the first pilot signal sent on the first time-frequency resource to power of the data signal sent on the first time-frequency resource; as well as, a ratio of power of the data signal sent on the first time-frequency resource to power of the first pilot signal sent on the first time-frequency resource; The first time-frequency resource is any one of the at least part of the time-frequency resources; the second time-frequency resource is any one of the at least part of the time-frequency resources, or the second time-frequency resource is any one of the other time-frequency resources except the at least part of the time-frequency resources.

46. ​​The method according to any one of claims 36, 34 or 40, wherein: The frequency domain position includes one or more of the following: Frequency domain density; A frequency domain offset value; and, Frequency domain pattern.

47. The method according to any one of claims 33, 34 or 40, wherein: The indicating the frequency domain position of the time-frequency resources occupied by the first pilot signal includes: Indicating the frequency domain position by a first bitmap; and / or, The frequency domain position is indicated by an identifier of the frequency domain resource.

48. The method according to any one of claims 33, 34 or 40, wherein: The time domain position includes one or more of the following: Time domain density; A time domain offset value; and, Time domain pattern.

49. The method according to any one of claims 33, 34 or 40, wherein: The indicating the time domain position of the time-frequency resources occupied by the first pilot signal includes: Indicating the time domain position by a second bitmap; and / or, The time domain position is indicated by an identifier of a time domain resource.

50. The method according to any one of claims 33, 34 or 40, wherein: The sequence generation parameters of the first pilot signal include one or more of the following: An identifier of a time domain resource in the time-frequency resource occupied by the first pilot signal; An identifier of a system frame number in which the first pilot signal resides; An identifier of a cell where the first pilot signal is located; An identifier of a carrier where the first pilot signal is located; an identifier of a port of the first pilot signal; a scrambling parameter of the first pilot signal; and An identifier of a control channel of the data signal.

51. A method according to any one of claims 27 to 50, wherein: The method further comprises: The network device receives capability information sent by the terminal device, wherein the capability information indicates that the terminal device supports a first The first type of pilot signal refers to a pilot signal in which at least part of the time-frequency resources are used to transmit data signals.

52. The method of claim 51, wherein: The capability information is for any of the following objects: Frequency band; Frequency band combination; Each band in the band combination; Each carrier on each band in the band combination; Frequency band range; The terminal device.

53. A communication device, applied to a terminal device, comprising: The first sending unit is configured to send first information to the network device, where the first information is used to indicate a first pilot signal.

54. A communication device, applied to a network device, comprising: The second receiving unit is configured to receive first information sent by the terminal device, where the first information is used to indicate a first pilot signal.

55. A communication device comprising: A memory for storing computer executable instructions; A processor, connected to the memory, configured to implement the method of any one of claims 1 to 26 by executing the computer executable instructions; or, to implement the method of any one of claims 27 to 52.

56. A chip, comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as described in any one of claims 1 to 26, or executes a method as described in any one of claims 27 to 52.

57. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by at least one processor, implements the method according to any one of claims 1 to 26, or implements the method according to any one of claims 27 to 52.

58. A computer program product, comprising a computer storage medium storing a computer program, wherein the computer program comprises instructions executable by at least one processor, and when the instructions are executed by the at least one processor, the method of any one of claims 1 to 26 is implemented, or the method of any one of claims 27 to 52 is implemented.

59. A computer program, wherein the computer program enables a computer to execute the method according to any one of claims 1 to 26, or to implement the method according to any one of claims 27 to 52.

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