Communication method and related device

Abstract

A communication method and related devices, in the method, a first device determines a first resource of a first demodulation reference signal (DMRS), a first resource pattern of the first resource comprising at least one or more of a first type pattern, a second type pattern, or a third type pattern, the DMRS of the first type of patterns occupies three resource units in a first frequency domain unit of a first antenna port; the DMRS of the second type of patterns occupies two resource units in a second frequency domain unit of a second antenna port; the DMRS of the third type of pattern occupies one resource unit in a third frequency domain unit of a third antenna port; the first device transmits or receives the first DMRS on the first resource. According to the method, the transmission performance of the DMRS can be improved, and MU space division multiplexing among a plurality of devices can be realized.

Description

Technical Field

[0001] This application relates to the field of communications, and more particularly to a communication method and related apparatus. Background Technology

[0002] Wireless communication can be a transmission communication between two or more communication devices that does not propagate through conductors or cables. Generally, the two or more communication devices include network devices and terminal devices, or the two or more communication devices include different terminal devices.

[0003] Currently, in wireless communication, network devices and terminal devices need to transmit a demodulation reference signal (DMRS). This DMRS is used for data demodulation. For example, a network device can pre-encode data along with the DMRS and then send it to the terminal device via a wireless channel, allowing the terminal device to demodulate the data based on the DMRS.

[0004] However, how to improve the transmission performance of DMRS is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] This application provides a communication method and related apparatus for improving the transmission performance of DMRS.

[0006] The first aspect of this application provides a communication method applied to, or performed by, a first device, which may be a communication device (such as a terminal device or a network device). Alternatively, the first device may be a component of the communication device (e.g., a circuit or chip responsible for communication functions, such as a modem chip, also known as a baseband chip, or a system-on-a-chip (SoC) chip containing a modem core, or a system-in-package (SoC) chip). The first device may be a package (SIP) chip, etc., or it may be a logic module or software capable of implementing all or part of the functions of a communication device. In this method, the first device determines a first resource of a first demodulation reference signal DMRS. The first resource pattern of the first resource includes at least one or more of a first type pattern, a second type pattern, or a third type pattern. The DMRS of the first type pattern occupies 3 resource units in the first frequency domain unit of the first antenna port; the DMRS of the second type pattern occupies 2 resource units in the second frequency domain unit of the second antenna port; and the DMRS of the third type pattern occupies 1 resource unit in the third frequency domain unit of the third antenna port. The first device transmits or receives the first DMRS on the first resource.

[0007] In the first aspect, the first resource pattern of the first resource of the first DMRS can be one or more of the first type, second type, or third type patterns. Regardless of whether it is the first type, second type, or third type pattern, a frequency domain element at an antenna port can occupy no more than 3 resource elements. Therefore, in the first aspect, due to the design of the first resource pattern, the first DMRS can occupy fewer resource elements. This saves bandwidth required by the first DMRS and increases the transmission rate of the first DMRS due to the reduced data volume, thereby improving the transmission performance of the DMRS.

[0008] In one possible implementation of the first aspect, the first device receives first information indicating that the first resource pattern is the first type of pattern, the second type of pattern, or the third type of pattern.

[0009] In the above implementation, the first device can determine the type of the first resource pattern based on the first information, and then determine information such as the code division multiplexing group of the first resource pattern based on the type of the first resource pattern, so as to realize the flexible determination of the type of the first resource pattern, meet different communication needs, and improve communication performance.

[0010] In one possible implementation of the first aspect, the first device receives second information for indicating at least one of the following: the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, or the frequency domain location of the first DMRS.

[0011] Based on the above implementation, the first device can determine the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, or the frequency domain position of the first DMRS through the second information. It can flexibly provide signaling indication for the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, or the frequency domain position of the first DMRS, to meet different communication needs and improve communication performance.

[0012] In one possible implementation of the first aspect, the first device receives third information, which includes information related to the first resource pattern.

[0013] Based on the above implementation method, the resource pattern of the first resource of the first device can be indicated as the first resource pattern, thereby avoiding interference with the first DMRS.

[0014] In one possible implementation of the first aspect, the first device sends the first information, which indicates that the first resource pattern is the first type of pattern, the second type of pattern, or the third type of pattern.

[0015] In the above implementation, the first device can indicate the type of the first resource pattern to other devices through the first information, and then other devices can determine the code division multiplexing group and other information of the first resource pattern according to the type of the first resource pattern, so as to realize the flexible determination of the type of the first resource pattern, meet different communication needs, and improve communication performance.

[0016] In one possible implementation of the first aspect, the first device sends the second information, which is used to indicate at least one of the following: the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, or the frequency domain location of the first DMRS.

[0017] Based on the above implementation, by sending second information to other devices, the first device can enable other devices to determine the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, or the frequency domain location of the first DMRS. This allows for flexible signaling indication of the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, or the frequency domain location of the first DMRS, thereby meeting different communication needs and improving communication performance.

[0018] In one possible implementation of the first aspect, the first device sends the third information, which includes information related to the first resource pattern.

[0019] Based on the above implementation, the first device can instruct other devices to use the resource pattern of the first resource as the first resource pattern, thereby avoiding interference with the first DMRS.

[0020] In one possible implementation of the first aspect, there is an association between at least two of the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, and the frequency domain location of the first DMRS.

[0021] Based on the above implementation, since there is a correlation between at least two of the following: the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, and the frequency domain location of the first DMRS, one can be used to determine the other. For example, the code division multiplexing group number of the first DMRS can be determined based on the antenna port occupied by the first DMRS. This can help the first device or other devices quickly determine the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, and the frequency domain location of the first DMRS. In addition, the above implementation can reduce the indication overhead of the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, and the frequency domain location of the first DMRS.

[0022] Optionally, the first device may send first information, second information, and / or third information via higher-layer signaling, such as radio resource control (RRC) signaling or media access control (MAC) control element (CE) signaling; or, the first device may send first information, second information, and / or third information via physical layer signaling, such as downlink control information (DCI).

[0023] Optionally, the third information may include the second information, or the third information may be sent simultaneously with the second information, or the third information may be sent first and then the second information may be sent, or the second information may be sent first and then the third information may be sent.

[0024] Optionally, the third information includes first indication information, wherein the first indication information is used to indicate the design method of the resource pattern of the first resource. For example, the first indication information can be an identifier of the first resource pattern, thereby indicating that the resource pattern of the first resource adopts the design method of the first resource pattern.

[0025] Optionally, the protocol may specify that the first frequency domain unit may include 2 or 4 code division multiplexing (CDM) groups, or the protocol may specify that the second frequency domain unit may include 3 or 6 CDM groups, and / or the protocol may specify that the third frequency domain unit may include 6 or 12 CDM groups; or, the second device may send second configuration information to the first device, the second configuration information being used to configure the number of CDM groups corresponding to the first frequency domain unit, the number of CDM groups corresponding to the second frequency domain unit, and / or the number of CDM groups corresponding to the third frequency domain unit; or, the second device may send second indication information to the first device, the second indication information indicating the number of CDM groups corresponding to the first frequency domain unit, and / or the number of CDM groups corresponding to the second frequency domain unit or the number of CDM groups corresponding to the third frequency domain unit.

[0026] Optionally, the second information may include third indication information, which is an identifier of the antenna port occupied by the first DMRS.

[0027] Optionally, the second information may include fourth indication information, which is the code division multiplexing group number of the first DMRS.

[0028] Optionally, the second information may include fifth indication information, which is used to indicate the frequency domain location of the first DMRS.

[0029] Optionally, the fifth indication information may indicate at least one of the starting frequency domain cell location and / or the number of frequency domain cells of the first resource.

[0030] Optionally, the fifth indication information may indicate the resource block group (RBG) index to which the first resource belongs.

[0031] Optionally, the fifth indication information may indicate the location of the rate-matched frequency domain resources in the frequency domain resources of the first data channel.

[0032] Optionally, the RBG index can be an RBG index within the carrier or the bandwidth part (BWP), or it can be an RBG index in the frequency domain resources of the first data channel.

[0033] Optionally, the fifth indication information may indicate a third index corresponding to the starting frequency domain cell position of the first resource, the third index being used to indicate one of the one or more starting frequency domain cell positions.

[0034] Optionally, the RB length is predefined by the protocol or configured by the RRC signaling.

[0035] Optionally, the fifth indication information may indicate a fourth index corresponding to the number of frequency domain units of the first resource, the fourth index being used to indicate one of the one or more frequency domain unit numbers.

[0036] Optionally, the starting RB is predefined by the protocol.

[0037] Optionally, the second information may include a sixth indication information for configuring the time-domain location of the first resource.

[0038] Optionally, the sixth indication information may indicate a first bitmap used to determine the symbol position of the first resource.

[0039] Optionally, the symbol position can be indicated within a time slot.

[0040] Optionally, the symbol position can be indicated on the time-domain resources of the first data channel.

[0041] For example, the sixth indication information may indicate at least one of the following: the starting time unit location, the number of time units, and the time domain density of the first resource.

[0042] Optionally, the start symbol position indicator is indicated within a time slot.

[0043] Optionally, the starting symbol position can be indicated on the time-domain resources of the first data channel.

[0044] Optionally, the symbol length can be 1, or 2, etc.

[0045] Optionally, the starting symbol position can be predefined, such as the starting symbol of a time slot, or the starting symbol of the first data channel.

[0046] Optionally, the symbol length is predefined by the protocol or configured by the RRC signaling.

[0047] For example, the sixth indication information may indicate the second bitmap.

[0048] For example, the second device indicates the candidate symbol position to the first device via RRC signaling.

[0049] For example, the second device sends a DCI to the first device, where the DCI indicates the position of a symbol or a bitmap.

[0050] For example, the sixth indication information may indicate a second index corresponding to the start time unit position of the first resource, the second index being used to indicate one of one or more start time unit positions.

[0051] For example, the second device indicates the candidate start symbol position to the first device via RRC signaling.

[0052] For example, the second device sends a DCI to the first device, and the DCI indicates the position of the start symbol.

[0053] Optionally, the symbol length is predefined by the protocol or configured by the RRC signaling.

[0054] In one possible implementation of the first aspect, the first resource pattern is one or more of the resource patterns of a non-zero-power channel state information reference signal (NZP-CSI-RS).

[0055] The above implementation can reduce the interference of other signals or channels on DMRS and improve communication performance. For example, taking a 6G terminal device as the first device, which can also be a 5G terminal device, and a third device as an access network device shared by the 6G and 5G terminal devices, when the resource pattern of the 6G terminal device's DMRS resources is one or more of the NZP-CSI-RS resource patterns, the access network device will send a zero-power channel state information reference signal (ZP-CSI-RS) resource location to the 5G terminal device. This allows the 5G terminal device to perform rate matching on the 6G terminal device's DMRS during data transmission, i.e., it does not use the 6G terminal device's DMRS resources. This avoids interference from 5G data transmission on 6G DMRS transmission, enabling multi-user (MU) spatial multiplexing between the 5G UE and 6G UE, and improving communication performance.

[0056] In one possible implementation of the first aspect, the first frequency domain unit includes at most 4 code division multiplexing groups; and / or, the second frequency domain unit includes at most 12 code division multiplexing groups; and / or, the third frequency domain unit includes at most 12 code division multiplexing groups.

[0057] The above implementation provides various correspondences between frequency domain units and code division multiplexing (CDM) groups, thus designing multiple CDM schemes. This allows for the selection of one or more CDM schemes based on the needs of the terminal device (e.g., a user) or the current network environment, thereby improving communication performance.

[0058] Optionally, the first device can determine the number of CDM groups occupied by the first DMRS in a frequency domain unit based on the type of the first resource pattern. For example, if the first device receives first information indicating that the first resource pattern is the first type of pattern, the first device can determine that the number of CDM groups occupied by the first DMRS in a frequency domain unit is one or more of 1 to 4.

[0059] Optionally, at least one of the following can be predefined, configured, or indicated: the number of CDM groups corresponding to the first frequency domain unit of the DMRS of the first type of pattern, the number of CDM groups corresponding to the second frequency domain unit of the DMRS of the second type of pattern, and the number of CDM groups corresponding to the third frequency domain unit of the DMRS of the third type of pattern.

[0060] In one possible implementation of the first aspect, the first code division multiplexing group of the DMRS of the first type pattern occupies subcarriers k1, k1+4 and k1+8 in the first frequency domain unit, wherein k1≥0 and k1 is an integer; and / or, the second code division multiplexing group of the DMRS of the second type pattern occupies subcarriers k2 and k2+1 in the second frequency domain unit, wherein k2=2N, wherein N≥0 and N is an integer; and / or, the third code division multiplexing group of the DMRS of the third type pattern occupies subcarrier k3 in the third frequency domain unit, wherein k3≥0 and k3 is an integer.

[0061] Based on the above implementation, the subcarrier spacing corresponding to different patterns is different, that is, the corresponding frequency domain positions are different. On the one hand, this application provides diverse frequency domain position design schemes, thereby improving the flexibility of frequency domain positions. On the other hand, the spacing between subcarriers in the above implementation is the same as the spacing between subcarriers of the NZP-CSI-RS resources defined by the protocol. Therefore, rate matching of DMRS can be achieved without changing the protocol, thereby improving communication performance.

[0062] In one possible implementation of the first aspect, the second antenna port of the DMRS of the second type of pattern occupies two resource units in one symbol in the time domain and one frequency domain unit in the frequency domain.

[0063] Based on the above implementation method, the second antenna port occupies fewer resource units, which can reduce the resource occupation of the second antenna port and save spectrum resources.

[0064] In one possible implementation of the first aspect, the second antenna port of the DMRS of the second type of pattern occupies 4 resource units in two symbols in the time domain and one frequency domain unit in the frequency domain.

[0065] Based on the above implementation method, time-domain code division multiplexing can be performed to improve the utilization of the spectrum.

[0066] In one possible implementation of the first aspect, when the first DMRS is a single symbol, the second frequency domain unit of the second type pattern DMRS includes at most 6 code division multiplexing groups.

[0067] Based on the above implementation, since the number of symbols occupied by the first DMR is small, the overhead caused by the first DMRS is relatively small.

[0068] In one possible implementation of the first aspect, when the first DMRS is a double symbol, the second frequency domain unit of the second type pattern DMRS includes at most 6 code division multiplexing groups or 12 code division multiplexing groups.

[0069] Based on the above implementation method, the first DMRS is a double symbol. Therefore, when channel estimation is performed through the first DMRS, the channel estimation result is more accurate, which can improve communication performance.

[0070] In one possible implementation of the first aspect, the first device determines the resource pattern of the first resource based on the communication carrier in which the first resource is located.

[0071] In the above implementation, the first device can determine the resource pattern of the first resource without interacting with other devices, thus shortening the signaling interaction delay and reducing the signaling overhead.

[0072] In one possible implementation of the first aspect, when the communication carrier is a shared carrier, the resource pattern of the first resource is the first resource pattern.

[0073] In the above implementation, while reducing interference from other data transmissions or channels / signals on the transmission of the first DMRS, the resources of the control channel can be utilized as much as possible for data transmission, thereby improving resource utilization and spectrum efficiency.

[0074] A second aspect of this application provides a communication method applied to, or performed by, a second device. This second device may be a communication device (e.g., a terminal device or a network device), or it may be a component of the communication device (e.g., a circuit or chip responsible for communication functions, such as a modem chip, also known as a baseband chip, or a SoC chip or SIP chip containing a modem core, etc.), or it may be a logic module or software capable of implementing all or part of the functions of the communication device. In this method, the second device determines a first resource of a first demodulation reference signal (DMRS). The first resource pattern of the first resource includes at least one or more of a first type of pattern, a second type of pattern, or a third type of pattern. The DMRS of the first type of pattern occupies three resource units in a first frequency domain unit of a first antenna port; the DMRS of the second type of pattern occupies two resource units in a second frequency domain unit of a second antenna port; and the DMRS of the third type of pattern occupies one resource unit in a third frequency domain unit of a third antenna port. The second device transmits or receives the first DMRS on the first resource.

[0075] In one possible implementation of the second aspect, the second device sends the first information, which indicates that the first resource pattern is the first type of pattern, the second type of pattern, or the third type of pattern.

[0076] In the above implementation, the second device can indicate the type of the first resource pattern to other devices through the first information. Then, other devices can determine the code division multiplexing group and other information of the first resource pattern according to the type of the first resource pattern, so as to realize the flexible determination of the type of the first resource pattern, meet different communication needs, and improve communication performance.

[0077] In one possible implementation of the second aspect, the second device sends the second information, which is used to indicate at least one of the following: the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, or the frequency domain location of the first DMRS.

[0078] Based on the above implementation, the second device can send second information to other devices, enabling the other devices to determine the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, or the frequency domain location of the first DMRS. This allows for flexible signaling indication of the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, or the frequency domain location of the first DMRS, thereby meeting different communication needs and improving communication performance.

[0079] In one possible implementation of the second aspect, the second device sends the third information, which includes information related to the first resource pattern.

[0080] Based on the above implementation, the second device can instruct other devices to use the resource pattern of the first resource as the first resource pattern, thereby avoiding interference with the first DMRS.

[0081] Optionally, the second device may send the first information, the second information, and / or the third information via higher-layer signaling, such as RRC signaling or MAC CE signaling; or, the second device may send the first information, the second information, and / or the third information via physical layer signaling, such as DCI signaling.

[0082] Optionally, the third information may include the second information, or the third information may be sent simultaneously with the second information, or the third information may be sent first and then the second information may be sent, or the second information may be sent first and then the third information may be sent.

[0083] Optionally, the third information includes first indication information, wherein the first indication information is used to indicate the design method of the resource pattern of the first resource. For example, the first indication information can be an identifier of the first resource pattern, thereby indicating that the resource pattern of the first resource adopts the design method of the first resource pattern.

[0084] Optionally, the protocol may specify that the first frequency domain unit may include 2 or 4 CDM groups, or the protocol may specify that the second frequency domain unit may include 3 or 6 CDM groups, and / or the protocol may specify that the third frequency domain unit may include 6 or 12 CDM groups; or, the second device may send second configuration information to the second device, the second configuration information being used to configure the number of CDM groups corresponding to the first frequency domain unit, the number of CDM groups corresponding to the second frequency domain unit, and / or the number of CDM groups corresponding to the third frequency domain unit; or, the second device may send second indication information to the second device, the second indication information indicating the number of CDM groups corresponding to the first frequency domain unit, and / or the number of CDM groups corresponding to the second frequency domain unit or the number of CDM groups corresponding to the third frequency domain unit.

[0085] Optionally, the second information may include third indication information, which is an identifier of the antenna port occupied by the first DMRS.

[0086] Optionally, the second information may include fourth indication information, which is the code division multiplexing group number of the first DMRS.

[0087] Optionally, the second information may include fifth indication information, which is used to indicate the frequency domain location of the first DMRS.

[0088] Optionally, the fifth indication information may indicate at least one of the starting frequency domain cell location and / or the number of frequency domain cells of the first resource.

[0089] Optionally, the fifth indication information may indicate the RBG index to which the first resource belongs.

[0090] Optionally, the fifth indication information may indicate the location of the rate-matched frequency domain resources in the frequency domain resources of the first data channel.

[0091] Optionally, the RBG index can be an RBG index within the carrier or in the BWP, or it can be an RBG index in the frequency domain resources of the first data channel.

[0092] Optionally, the fifth indication information may indicate a third index corresponding to the starting frequency domain cell position of the first resource, the third index being used to indicate one of the one or more starting frequency domain cell positions.

[0093] Optionally, the RB length is predefined by the protocol or configured by the RRC signaling.

[0094] Optionally, the fifth indication information may indicate a fourth index corresponding to the number of frequency domain units of the first resource, the fourth index being used to indicate one of the one or more frequency domain unit numbers.

[0095] Optionally, the starting RB is predefined by the protocol.

[0096] Optionally, the second information may include a sixth indication information for configuring the time-domain location of the first resource.

[0097] Optionally, the sixth indication information may indicate a first bitmap used to determine the symbol position of the first resource.

[0098] Optionally, the symbol position can be indicated within a time slot.

[0099] Optionally, the symbol position can be indicated on the time-domain resources of the first data channel.

[0100] For example, the sixth indication information may indicate at least one of the following: the starting time unit location, the number of time units, and the time domain density of the first resource.

[0101] Optionally, the start symbol position indicator is indicated within a time slot.

[0102] Optionally, the starting symbol position can be indicated on the time-domain resources of the first data channel.

[0103] Optionally, the symbol length can be 1, or 2, etc.

[0104] Optionally, the starting symbol position can be predefined, such as the starting symbol of a time slot, or the starting symbol of the first data channel.

[0105] Optionally, the symbol length is predefined by the protocol or configured by the RRC signaling.

[0106] For example, the sixth indication information may indicate the second bitmap.

[0107] For example, the second device indicates the position of the candidate symbol to the second device via RRC signaling.

[0108] For example, the second device sends a DCI to the second device, and the DCI indicates the position of the symbol or the bitmap.

[0109] For example, the sixth indication information may indicate a second index corresponding to the start time unit position of the first resource, the second index being used to indicate one of one or more start time unit positions.

[0110] For example, the second device indicates the position of the candidate start symbol to the second device via RRC signaling.

[0111] For example, the second device sends a DCI to the second device, and the DCI indicates the position of the start symbol.

[0112] Optionally, the symbol length is predefined by the protocol or configured by the RRC signaling.

[0113] In one possible implementation of the second aspect, there is an association between at least two of the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, and the frequency domain location of the first DMRS.

[0114] Based on the above implementation, since there is a correlation between at least two of the following: the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, and the frequency domain location of the first DMRS, one can be used to determine the other. For example, the code division multiplexing group number of the first DMRS can be determined based on the antenna port occupied by the first DMRS. This can help the second device or other devices quickly determine the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, and the frequency domain location of the first DMRS. In addition, the above implementation can reduce the indication overhead of the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, and the frequency domain location of the first DMRS.

[0115] In one possible implementation of the second aspect, the first resource pattern is one or more of the resource patterns of NZP-CSI-RS.

[0116] The above implementation can reduce the interference of other signals or channels on DMRS and improve communication performance. For example, taking a 6G terminal device as the second device (which can also be a 5G terminal device), and an access network device shared by the 6G and 5G terminal devices as the third device, when the DMRS resource pattern of the 6G terminal device is one or more of the NZP-CSI-RS resource patterns, the access network device will send the ZP-CSI-RS resource location to the 5G terminal device. This allows the 5G terminal device to perform rate matching on the 6G terminal device's DMRS during data transmission, meaning it does not use the 6G terminal device's DMRS resources. This avoids interference from 5G data transmission on 6G DMRS transmission, enabling multi-user MU spatial multiplexing between the 5G and 6G UEs and improving communication performance.

[0117] In one possible implementation of the second aspect, the first frequency domain unit includes at most 4 code division multiplexing groups; and / or, the second frequency domain unit includes at most 12 code division multiplexing groups; and / or, the third frequency domain unit includes at most 12 code division multiplexing groups.

[0118] The above implementation provides various correspondences between frequency domain units and code division multiplexing (CDM) groups, thus designing multiple CDM schemes. This allows for the selection of one or more CDM schemes based on the needs of the terminal device (e.g., a user) or the current network environment, thereby improving communication performance.

[0119] Optionally, the second device can determine the number of CDM groups occupied by the first DMRS in a frequency domain unit based on the type of the first resource pattern. For example, if the second device receives first information indicating that the first resource pattern is the first type of pattern, the second device can determine that the number of CDM groups occupied by the first DMRS in a frequency domain unit is one or more of 1 to 4.

[0120] Optionally, at least one of the following can be predefined, configured, or indicated: the number of CDM groups corresponding to the first frequency domain unit of the DMRS of the first type of pattern, the number of CDM groups corresponding to the second frequency domain unit of the DMRS of the second type of pattern, and the number of CDM groups corresponding to the third frequency domain unit of the DMRS of the third type of pattern.

[0121] In one possible implementation of the second aspect, the first code division multiplexing group of the DMRS of the first type pattern occupies subcarriers k1, k1+4 and k1+8 in the first frequency domain unit, wherein k1≥0 and k1 is an integer; and / or, the second code division multiplexing group of the DMRS of the second type pattern occupies subcarriers k2 and k2+1 in the second frequency domain unit, wherein k2=2N, wherein N≥0 and N is an integer; and / or, the third code division multiplexing group of the DMRS of the third type pattern occupies subcarrier k3 in the third frequency domain unit, wherein k3≥0 and k3 is an integer.

[0122] Based on the above implementation, the subcarrier spacing corresponding to different patterns is different, that is, the corresponding frequency domain positions are different. On the one hand, this application provides diverse frequency domain position design schemes, thereby improving the flexibility of frequency domain positions. On the other hand, the spacing between subcarriers in the above implementation is the same as the spacing between subcarriers of the NZP-CSI-RS resources defined by the protocol. Therefore, rate matching of DMRS can be achieved without changing the protocol, thereby improving communication performance.

[0123] In one possible implementation of the second aspect, the second antenna port of the DMRS of the second type of pattern occupies 2 resource units in one symbol frequency unit in the time domain and one frequency unit in the frequency domain.

[0124] Based on the above implementation method, the second antenna port occupies fewer resource units, which can reduce the resource occupation of the second antenna port and save spectrum resources.

[0125] In one possible implementation of the second aspect, the second antenna port of the DMRS of the second type of pattern occupies 4 resource units in two symbols in the time domain and one frequency domain unit in the frequency domain.

[0126] Based on the above implementation method, time-domain code division multiplexing can be performed to improve the utilization of the spectrum.

[0127] In one possible implementation of the second aspect, when the first DMRS is a single symbol, the second frequency domain unit of the DMRS of the second type pattern includes at most 6 code division multiplexing groups.

[0128] Based on the above implementation, since the number of symbols occupied by the first DMR is small, the overhead caused by the first DMRS is relatively small.

[0129] In one possible implementation of the second aspect, when the first DMRS is a double symbol, the second frequency domain unit of the second type pattern DMRS includes at most 6 code division multiplexing groups or 12 code division multiplexing groups.

[0130] Based on the above implementation method, the first DMRS is a double symbol. Therefore, when channel estimation is performed through the first DMRS, the channel estimation result is more accurate, which can improve communication performance.

[0131] In one possible implementation of the second aspect, the second device determines the resource pattern of the first resource based on the communication carrier in which the first resource is located.

[0132] In the above implementation, the second device can determine the resource pattern of the first resource without interacting with other devices, thus shortening the signaling interaction latency and reducing the signaling overhead.

[0133] In one possible implementation of the second aspect, when the communication carrier is a shared carrier, the resource pattern of the first resource is the first resource pattern.

[0134] In the above implementation, while reducing interference from other data transmissions or channels / signals on the transmission of the first DMRS, the resources of the control channel can be utilized as much as possible for data transmission, thereby improving resource utilization and spectrum efficiency.

[0135] A third aspect of this application provides a communication apparatus, which is a first apparatus, comprising a transceiver unit and a processing unit. The processing unit is configured to determine a first resource of a first demodulation reference signal (DMRS). The first resource pattern of the first resource includes at least one or more of a first type pattern, a second type pattern, or a third type pattern. The DMRS of the first type pattern occupies 3 resource units in a first frequency domain unit of a first antenna port. The DMRS of the second type pattern occupies 2 resource units in a second frequency domain unit of a second antenna port. The DMRS of the third type pattern occupies 1 resource unit in a third frequency domain unit of a third antenna port. The transceiver unit is configured to transmit or receive the first DMRS on the first resource.

[0136] In the third aspect of this application, the constituent modules of the communication device can also be used to execute the steps performed in various possible implementations of the first aspect and achieve the corresponding technical effects. For details, please refer to the first aspect, which will not be repeated here.

[0137] A fourth aspect of this application provides a communication apparatus, which is a second apparatus, comprising a transceiver unit and a processing unit; the processing unit is configured to determine a first resource of a first demodulation reference signal (DMRS), the first resource pattern of which includes at least one or more of a first type pattern, a second type pattern, or a third type pattern, wherein the DMRS of the first type pattern occupies 3 resource units in a first frequency domain unit of a first antenna port; the DMRS of the second type pattern occupies 2 resource units in a second frequency domain unit of a second antenna port; and the DMRS of the third type pattern occupies 1 resource unit in a third frequency domain unit of a third antenna port; the transceiver unit is configured to transmit or receive the first DMRS on the first resource.

[0138] In the fourth aspect of this application, the constituent modules of the communication device can also be used to perform the steps executed in various possible implementations of the second aspect and achieve the corresponding technical effects. For details, please refer to the second aspect, which will not be repeated here.

[0139] A fifth aspect of this application provides a communication device including at least one processor coupled to a memory; the memory is used to store a program or instructions; the at least one processor is used to execute the program or instructions to cause the device to implement the method described in any possible implementation of the first or second aspect. Optionally, the communication device may include the memory.

[0140] The sixth aspect of this application provides a communication device including at least one logic circuit and an input / output interface; the logic circuit is used to perform the method described in any of the possible implementations of the first or second aspect described above.

[0141] A seventh aspect of this application provides a communication system that includes the first device and the second device described above.

[0142] An eighth aspect of this application provides a computer-readable storage medium for storing one or more computer-executable instructions, which, when executed by a computer, perform the method as described in any possible implementation of the first or second aspect above.

[0143] The ninth aspect of this application provides a computer program product (or computer program) that, when executed by a computer, performs the method described in any possible implementation of the first or second aspect described above.

[0144] The tenth aspect of this application provides a chip or chip system including at least one processor for supporting a communication device in implementing the method described in any of the possible implementations of the first or second aspect. For example, the chip may be a baseband chip, a modem chip, a SoC chip (such as a SoC chip containing a modem core), a SIP chip, or a communication module, etc.

[0145] In one possible design, the chip or chip system may further include a memory for storing program instructions and data necessary for the communication device. The chip system may be composed of chips or may include chips and other discrete devices. Optionally, the chip system may also include interface circuitry that provides program instructions and / or data to the at least one processor.

[0146] The technical effects of any of the design methods in aspects three through ten can be found in the technical effects of different design methods in aspects one or two above, and will not be repeated here. Attached Figure Description

[0147] Figures 1a-1g Some schematic diagrams of the communication system provided in this application;

[0148] Figures 2a-2f These are some schematic diagrams illustrating the communication processes involved in this application;

[0149] Figure 3 A schematic diagram of the communication method provided in this application;

[0150] Figure 4 A schematic diagram illustrating the application scenario provided in this application;

[0151] Figure 5 A schematic diagram of the data mapping process provided in this application;

[0152] Figures 6a-6d Some schematic diagrams of the first type of drawings provided in this application;

[0153] Figures 7a-7f Some schematic diagrams of the first drawing provided in this application;

[0154] Figure 8 A schematic diagram of the second drawing provided in this application;

[0155] Figure 9 A schematic diagram of the third drawing provided in this application;

[0156] Figures 10a-10d Some schematic diagrams of the Class III drawings provided in this application;

[0157] Figures 11-15 Some schematic diagrams of the communication device provided in this application. Detailed Implementation

[0158] First, some terms used in the embodiments of this application will be explained to facilitate understanding by those skilled in the art.

[0159] (1) Terminal device: can be a wireless terminal device that can receive network device scheduling and instruction information. The wireless terminal device can be a device that provides voice and / or data connectivity to the terminal device (such as the user), or a handheld device with wireless connection function, or other processing device connected to a wireless modem.

[0160] Terminal devices can communicate with one or more core networks or the Internet via a radio access network (RAN). Terminal devices can be mobile terminal devices, such as mobile phones (or "cellular" phones), computers, and data cards. For example, they can be portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile devices that exchange voice and / or data with the RAN. Examples include personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), tablets, and computers with wireless transceiver capabilities. Wireless terminal equipment can also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile station (MS), remote station, access point (AP), remote terminal, access terminal, user terminal, user agent, subscriber station (SS), customer premises equipment (CPE), terminal, user equipment (UE), mobile terminal (MT), drone, etc. Terminal equipment can also be wearable devices and next-generation communication systems, such as terminal equipment in 5G communication systems or terminal equipment in future public land mobile networks (PLMNs).

[0161] Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, and integrated communication and sensing. Terminals can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, aircraft, ships, robots, robotic arms, smart home devices, sensors, etc. The embodiments of this application do not limit the specific technologies or device forms used in the terminals.

[0162] (2) Network equipment (or network element): This can be equipment in a wireless network. For example, network equipment can be a RAN node (or device) that connects terminal devices to the wireless network, and can also be called a base station. Currently, some examples of RAN equipment include: base station, evolved NodeB (eNodeB), gNB (gNodeB) in 5G communication systems, transmission reception point (TRP), evolved Node B (eNB), radio network controller (RNC), Node B (NB), home base station (e.g., home evolved Node B, or home Node B, HNB), base band unit (BBU), or wireless fidelity (Wi-Fi) access point (AP), etc. In addition, in a network structure, network equipment can include central unit (CU) nodes, distributed unit (DU) nodes, or RAN equipment including CU nodes and DU nodes.

[0163] Optionally, RAN nodes can also be macro base stations, micro base stations, indoor stations, relay nodes, donor nodes, or radio controllers in cloud radio access network (CRAN) scenarios. RAN nodes can also be servers, wearable devices, vehicles, or in-vehicle equipment. For example, the access network equipment in V2X technology can be a roadside unit (RSU).

[0164] Network devices and / or terminal devices can be fixed in location or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can be deployed on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of the network devices and / or terminal devices.

[0165] In another possible scenario, multiple RAN nodes collaborate to assist the terminal in achieving wireless access, with different RAN nodes each implementing some of the base station's functions. For example, RAN nodes can be CUs, DUs, CUs (control plane, CP), CUs (user plane, UP), or radio units (RUs). CUs and DUs can be set up separately or included in the same network element, such as a baseband unit (BBU). RUs can be included in radio frequency equipment or radio frequency units, such as remote radio units (RRUs), active antenna units (AAUs), or remote radio heads (RRHs).

[0166] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an open access network (open RAN, O-RAN, or ORAN) system, CU can also be called O-CU (open CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. For ease of description, this application uses CU, CU-CP, CU-UP, DU, and RU as examples. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software modules and hardware modules.

[0167] Communication between access network devices and terminal devices follows a specific protocol layer structure. This protocol layer may include a control plane protocol layer and a user plane protocol layer. The control plane protocol layer may include at least one of the following: radio resource control (RRC) layer, packet data convergence protocol (PDCP) layer, radio link control (RLC) layer, media access control (MAC) layer, or physical (PHY) layer, etc. The user plane protocol layer may include at least one of the following: service data adaptation protocol (SDAP) layer, PDCP layer, RLC layer, MAC layer, or physical layer, etc. The physical layer may include a higher physical layer (higher PHY or PHY-high) and a lower physical layer (lower PHY or PHY-low). The functions of the higher physical layer include one or more of the following: forward error correction (FEC) encoding / decoding, scrambling / descrambling, or modulation / demodulation. The lower physical layer (PHY) functions and radio frequency (RF) functions include one or more of the following: fast fourier transform (FFT) / inverse fast fourier transform (IFFT), digital beamforming, or extraction and filtering of the physical random access channel (PRACH).

[0168] The correspondence between network elements and their achievable protocol layer functions in the ORAN system can be found in Table 1 below.

[0169] Table 1

[0170] ORAN network element 3GPP protocol layer functions O-CU-CP RRC+PDCP - Control Plane (PDCP-C) O-CU-UP SDAP+PDCP - User Plane (PDCP-U) O-DU RLC+MAC+PHY-high O-RU PHY-low

[0171] Network devices can be other devices that provide wireless communication functions for terminal devices. The embodiments of this application do not limit the specific technology or form of the network device. For ease of description, the embodiments of this application are not limited.

[0172] Network equipment may also include core network equipment, such as the Mobility Management Entity (MME), Home Subscriber Server (HSS), Serving Gateway (S-GW), Policy and Charging Rules Function (PCRF), and Public Data Network Gateway (PDN Gateway, P-GW) in 4th generation (4G) networks; and access and mobility management functions (AMF), user plane functions (UPF), or session management functions (SMF) in 5G networks. Furthermore, this core network equipment may also include other core network equipment in 5G networks and next-generation networks of 5G networks.

[0173] In this application embodiment, the device for implementing the function of the network device can be the network device itself, or it can be a device capable of supporting the network device in implementing that function, such as a chip system, which can be installed in the network device. In the technical solutions provided in this application embodiment, the example of a network device being used to implement the function of the network device is used to describe the technical solutions provided in this application embodiment.

[0174] (3) Configuration and Pre-configuration: In this application, both configuration and pre-configuration are used. Configuration refers to the network device sending configuration information or parameter values ​​of some parameters to the terminal device through messages or signaling, so that the terminal device can determine the communication parameters or resources during transmission based on these values ​​or information. Pre-configuration is similar to configuration and can be parameter information or parameter values ​​that the network device and the terminal device have negotiated in advance, or parameter information or parameter values ​​that the network device and / or the terminal device use as specified by the standard protocol, or parameter information or parameter values ​​that are pre-stored in the network device and / or the terminal device. This application does not limit this.

[0175] Furthermore, these values ​​and parameters can be changed, updated, or reconfigured.

[0176] (4) The terms "system" and "network" in the embodiments of this application can be used interchangeably. "At least one" means one or more, and "more" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, "at least one of A, B and C" includes A, B, C, AB, AC, BC or ABC. And, unless otherwise specified, the ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects and are not used to limit the order, sequence, priority or importance of multiple objects.

[0177] (5) In the embodiments of this application, "send" and "receive" indicate the direction of signal transmission. For example, "send information to XX" can be understood as the destination of the information being XX, which may include sending directly through the air interface or sending indirectly through the air interface by other units or modules. "Receive information from YY" can be understood as the source of the information being YY, which may include receiving directly from YY through the air interface or receiving indirectly from YY through the air interface by other units or modules. "Send" can also be understood as the "output" of the chip interface, and "receive" can also be understood as the "input" of the chip interface.

[0178] In other words, sending and receiving can occur between devices, such as between network devices and terminal devices, or within a device, such as between components, modules, chips, software modules, or hardware modules within the device via buses, wiring, or interfaces.

[0179] It is understandable that information may undergo necessary processing, such as encoding and modulation, between the source and destination, but the destination can understand the valid information from the source. Similar statements in this application can be interpreted in a similar way and will not be elaborated further.

[0180] (6) In the embodiments of this application, "instruction" may include direct instruction and indirect instruction, as well as explicit instruction and implicit instruction. The information indicated by a certain piece of information (as described below, the instruction information) is called the information to be instructed. In the specific implementation process, there are many ways to indicate the information to be instructed, such as, but not limited to, directly indicating the information to be instructed, such as the information to be instructed itself or its index. It can also indirectly indicate the information to be instructed by indicating other information, where there is an association between the other information and the information to be instructed; or it can only indicate a part of the information to be instructed, while the other parts of the information to be instructed are known or pre-agreed upon. For example, the instruction can be implemented by using a pre-agreed (e.g., protocol predefined) arrangement order of various information, thereby reducing the instruction overhead to a certain extent. This application does not limit the specific method of instruction. It is understood that for the sender of the instruction information, the instruction information can be used to indicate the information to be instructed, and for the receiver of the instruction information, the instruction information can be used to determine the information to be instructed.

[0181] (7) Rate matching.

[0182] Rate matching is used in wireless communication systems to adjust the coded data bit rate to suit the bit-carrying capacity of physical layer transmission resources. In communication systems (such as LTE and NR systems), the rate matching process ensures that the number of coded bits matches the number of bits that physical layer resource units can carry. The goal of rate matching is to optimize data transmission efficiency, prevent the number of data bits from exceeding the carrying capacity of physical layer resources, and ensure both reliability and efficiency of transmission.

[0183] For example, rate matching involves the following steps:

[0184] ① Encoding: First, the data is channel-coded to generate coded bits (CB).

[0185] ② Bit Selection: Then, a subset of bits in the encoded bitstream is selected to match the number of bits that the physical layer resources can carry. This typically involves bit insertion or deletion to ensure that the data rate matches the bit-carrying capacity of the physical layer resources.

[0186] ③ Interleaving: Interleaving is part of the rate matching process. It changes the output order of the bit stream but does not involve the addition or deletion of bits.

[0187] In general, in NR systems, "puncturing" is a rate matching technique used to adjust the rate of the encoded data stream to adapt to different transmission requirements and channel conditions. The puncturing process involves selectively deleting (or ignoring) bits from the encoded bitstream to reduce the data stream's bit rate and match it to the physical layer's transmission resources. Specifically, when the number of encoded data bits exceeds the physical layer's capacity, puncturing is used to reduce the number of bits. The puncturing algorithm selects which bits to delete based on certain rules, which typically consider the importance of the bits to minimize the impact on decoding performance.

[0188] In this application, unless otherwise specified, the same or similar parts between the various embodiments can be referred to each other. In the various embodiments of this application, and in the various implementation methods / methods / implementations within each embodiment, unless otherwise specified or logically conflicting, the terminology and / or descriptions between different embodiments and between the various implementation methods / methods / implementations within each embodiment are consistent and can be mutually referenced. The technical features in different embodiments and the various implementation methods / methods / implementations within each embodiment can be combined according to their inherent logical relationships to form new embodiments, implementation methods, methods, or implementation approaches. The embodiments described below do not constitute a limitation on the scope of protection of this application.

[0189] To facilitate understanding of the methods provided in the embodiments of this application, the system architecture of the methods provided in the embodiments of this application will be described below. It is understood that the system architecture described in the embodiments of this application is for the purpose of more clearly illustrating the solutions of the embodiments of this application and does not constitute a limitation on the solutions provided in the embodiments of this application.

[0190] In one possible implementation, this application can be applied to narrowband Internet of Things (NB-IoT) systems, Global System for Mobile Communications (GSM), Enhanced Data Rate for GSM Evolution (EDGE), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access 2000 (CDMA2000), Time Division-Synchronization Code Division Multiple Access (TD-SCDMA), Integrated Sensing and Communication (ISAC) systems, Wireless Local Area Networks (WLANs), Short-Range Wireless Communication Systems (such as sidelinks, Wireless Fidelity (Wi-Fi or WiFi), Bluetooth, etc.), Wired Networks, and Vehicle-to-Everything (V2X) systems. Everything, including V2X communication systems, device-to-device (D2D) communication systems, vehicle-to-everything (V2X) communication systems, 4th generation (4G) mobile communication systems (such as Long Term Evolution (LTE) systems), LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, Worldwide Interoperability for Microwave Access (WiMAX) communication systems, 5th generation (5G) mobile communication systems (such as New Radio (NR) systems), future evolved New Radio (NR) wireless communication systems, or other similar communication systems, is not restricted.For example, this application can be applied to orthogonal frequency division multiplexing (OFDM) systems in LTE, OFDM systems in NR, and future OFDM systems and similar systems. For instance, this application can be applied to the three major application scenarios of next-generation 5G mobile communication systems: enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), and / or enhanced machine-type communication (eMTC).

[0191] Please see Figure 1a This is a schematic diagram of the architecture of the communication system 1000 used in an embodiment of this application. Figure 1a As shown, the communication system includes RAN 100 and core network 200. Optionally, the communication system 1000 may also include Internet 300. RAN 100 includes at least one RAN node (e.g., Figure 1a 110a and 110b, collectively referred to as 110, may also include at least one terminal (such as...). Figure 1a RAN 100, denoted as RAN 120a-120j, is collectively referred to as RAN 120. RAN 100 may also include other RAN nodes, such as wireless relay equipment and / or wireless backhaul equipment. Figure 1a (Not shown in the image). Terminal 120 connects wirelessly to RAN node 110, and RAN node 110 connects wirelessly or via a wired connection to core network 200. The core network equipment in core network 200 and RAN node 110 in RAN 100 can be independent physical devices, or they can be the same physical device integrating the logical functions of core network equipment and RAN nodes. Terminals can connect to each other, and RAN nodes can connect to each other, via wired or wireless connections.

[0192] Figure 1b An example diagram of an O-RAN system is shown. An O-RAN system may include components other than those shown in the diagram. As illustrated, access network equipment (such as RAN equipment, for example, an eNB, gNB, or next-generation access network equipment) communicates with the core network (CN) via a backhaul link and with the UE via an air interface.

[0193] As an example, a RAN node can be a satellite base station or a satellite, as described below. Figures 1c-1g illustrate. Figure 1cand Figure 1d This is a schematic diagram of a communication system applicable to embodiments of this application.

[0194] like Figure 1c and Figure 1d As shown, satellite base stations provide communication services to terminals. For example, a satellite base station transmits downlink data to a terminal, where the data is encoded using channel coding, and the channel-coded data is then transmitted to the terminal after constellation modulation. Similarly, a terminal transmits uplink data to a satellite base station; the uplink data can also be encoded using channel coding, and the encoded data is then transmitted to the satellite base station after constellation modulation. Additionally, as... Figure 1d As shown, satellite base stations can also communicate with ground base stations; that is, a satellite can act as a base station or as a terminal.

[0195] In this application, "satellite" can refer to unmanned aerial vehicles (UAVs), hot air balloons, low-Earth orbit (LEO) satellites, medium-Earth orbit (MEO) satellites, high-Earth orbit (HEO) satellites, etc. "Satellite" can also refer to non-terrestrial base stations or non-terrestrial equipment, etc.

[0196] It should be understood that this application can be applied to scenarios involving communication between network devices. Figure 1d The scenario shown can also be seen as an example of network devices communicating with each other, where both the satellite and the base station can be considered as a network device.

[0197] As one implementation method, this application can be applied to inter-satellite link communication systems. For example... Figure 1e The communication between satellite #1 and satellite #2 is shown.

[0198] like Figure 1f As shown, the inter-satellite link communication system can be divided into two main parts: an acquisition, pointing, and tracking (APT) subsystem (including the APT module and APT transmitter / receiver) and a communication subsystem (including the communication module and transceiver antennas). The communication subsystem is primarily responsible for the transmission of inter-satellite information and forms the core of the inter-satellite communication system. The APT system is mainly responsible for acquisition, alignment, and tracking between satellites. Acquisition involves determining the direction of the incoming incident signal, and alignment involves adjusting the transmitted wave to aim at the receiving direction. Tracking involves continuously adjusting the APT for alignment and acquisition throughout the communication process. To minimize attenuation and interference in the channel while maintaining high security and transmission rate, the APT must be adjusted in real time to continuously adapt to changes.

[0199] It should be understood that current APT systems are all optical systems, which have the disadvantage of being difficult to align and requiring mechanical adjustment of the pointing. Most existing communication subsystems are optical communication systems, with some microwave band systems, and most use a single high-gain antenna. Existing APT systems and communication subsystems are independent systems. The disadvantages are that optical communication is susceptible to vibration and other factors, resulting in unstable data rates; millimeter-wave frequencies are low, communication capacity is low, and the antenna requires mechanical adjustment of its pointing.

[0200] As another implementation, this application can be applied to scenarios where terminal devices communicate with each other, such as Internet of Things (IoT) communication systems.

[0201] Figure 1f This is a schematic diagram of a wireless screen mirroring method applicable to embodiments of this application. A terminal device (e.g., a smartphone) establishes a network connection with a television. The smartphone transmits the content to be mirrored onto the television to the television. After receiving the content transmitted by the smartphone, the television displays the content on its screen.

[0202] It should be understood that Figure 1g The screen mirroring scenario shown can be seen as an example of communication between terminal devices, where both smartphones and televisions can be considered as terminal devices.

[0203] As another implementation method, this application can be applied to integrated access and backhaul (IAB) systems.

[0204] Figure 1g This is a schematic diagram of an IAB system applicable to embodiments of this application. For example... Figures 1a-1g As shown, an IAB can include an IAB donor, an IAB node, and a terminal. The link between the IAB donor and the IAB node is a backhaul link, and the link between the terminal and the IAB node is an access link. This application can be applied to both parties communicating in a backhaul link or to both parties communicating in an access link.

[0205] It should be understood that the above system application scenarios are only examples, and this application can also be applied to other scenarios, which will not be listed here.

[0206] In wireless communication systems (e.g.) μ In any of the systems shown in the accompanying figures, wireless communication resources generally include time-frequency resources. The following will use an NR system as an example to introduce time-frequency resources. It should be understood that NR can also be replaced with 5G or 5G NR.

[0207] 1. Parameter set (Numerology).

[0208] 5G NR introduces the concept of Numerology, which includes sub-carrier spacing (SCS) and corresponding parameters such as symbol length and cyclic prefix (CP) length. Because there is a certain mapping relationship between SCS and symbol length and CP length, SCS is often used instead of Numerology in some literature.

[0209] For example, the parameters involved in Numerology are shown in Table 2.

[0210] Table 2

[0211] SCS CP Supported frequency ranges (FR) Normal 0 15 FR1 Normal 1 30 FR1 Normal, Extended 2 60 FR1, FR2 Normal 3 120 FR2 Normal 4 240 FR2 Subcarrier spacing (kHz)

[0212] In Table 2, μ represents the subcarrier spacing index, or μ represents the parameter set numberology, CP length includes the normal CP length and the extended CP length, and FR represents the frequency range (FR).

[0213] 2. Frame structure.

[0214] In NR systems, time-domain units include symbols, slots, subframes, half-frames, and frames. A frame lasts 10 ms and can be divided into 10 subframes, numbered 0-9. Subframes numbered 0-4 form one half-frame, and subframes numbered 5-9 form another half-frame. Each subframe lasts 1 ms. Each subframe can include one or more slots. Under normal CP, each slot includes 14 symbols; under extended CP, each slot includes 12 symbols.

[0215] For example, the number of time slots included in each subframe is related to the SCS, and the relationship between the two is shown in Table 3.

[0216] Table 3

[0217] Number of slots per subframe Figure 2a 15 1 30 2 60 4 120 8 240 16 480 32 960 64

[0218] like Figure 2b The example shown is a schematic diagram of a 5G NR frame structure, including:

[0219] Frame: Length is fixed at 10ms, frame number range: 0-1023.

[0220] Subframe: The length is fixed at 1ms, and the subframe number ranges from 0 to 9.

[0221] Time slot: When using normal CP, the length is 14 symbols. Since the symbol length is not fixed, the time slot length is also not fixed. When the SCS is 60kHz, extended CP can also be used, in which case the time slot length is 12 symbols. Optionally, the time slot is the smallest unit for data scheduling.

[0222] Symbol: Length is not fixed and is related to SCS. Optional, the symbol is the basic unit of modulation.

[0223] Generally, in the physical layer, a symbol can contain several sampling points, and a sampling point can be the smallest time unit of the physical layer.

[0224] Furthermore, the scheduling time unit in the 5G NR data domain is the time slot, and the number of symbols contained in a time slot is fixed. The length of a symbol is related to the SCS (Segment Classification). The following will illustrate the relationship between frames, subframes, time slots, and symbols using SCS of 30kHz and 120kHz as examples.

[0225] like Figure 2c and Figure 2d The examples shown illustrate the relationships between frames, subframes, time slots, and symbols for SCS values ​​of 30kHz and 120kHz, respectively.

[0226] 3. Symbol type and slot format.

[0227] Generally, OFDM symbols include three types, namely:

[0228] Downlink: Represented by the letter D, it is used for downlink transmission.

[0229] Uplink: Represented by the letter U, used for uplink transmission.

[0230] Flexible: Represented by the letter F, it can be used for uplink transmission as well as downlink transmission, and can also be used as a guard period (GP) or reserved resources.

[0231] Optionally, each time slot can be freely combined from these three types of symbols to form multiple time slot formats.

[0232] like Figure 2d As shown in the example, the slot type can be divided into four cases according to the slot format defined by the protocol.

[0233] Case 1: Contains only the "D" symbol, often referred to as a downlink-only slot (DL-only slot).

[0234] Case 2: Contains only the "U" symbol, often referred to as a downlink-only slot (UL-only slot).

[0235] Case 3: Contains only the "F" symbol, often referred to as a flexible-only slot.

[0236] Case 4: A time slot contains at least one "D" or "U" symbol, and the time slot also contains an "F" symbol.

[0237] In addition, in such Figure 2d As shown, Case 4 can be further divided into several sub-cases.

[0238] Case 4-1: A time slot contains more "D" symbols and fewer "F" symbols.

[0239] Case 4-2: A time slot contains more "U" symbols and fewer "F" symbols.

[0240] Case 4-3: A time slot contains more "D" symbols, fewer "F" symbols, and fewer "U" symbols.

[0241] Case 4-4: A time slot contains more "U" symbols, fewer "F" symbols, and fewer "D" symbols.

[0242] Case 4-5: A time slot contains alternating "D" symbols, "F" symbols, and "U" symbols.

[0243] As the examples above demonstrate, 5G NR's slot format design allows for symbol-level changes in uplink and downlink data, whereas LTE typically only allows for subframe-level changes. This design is more flexible and also provides a wider variety of slot types to adapt to different service types in various scenarios.

[0244] 4. Self-contained time slots.

[0245] Figure 2d Case 4-3, Case 4-4, and Case 4-5 are also known as self-contained slots, which correspond to two different structures of self-contained slots.

[0246] One structure is a time slot primarily used for downlink (DL-dominant slot): that is... Figure 2dIn Case 4-3, the time slot is mainly used for downlink data transmission, while a small number of symbols are time-division multiplexed to transmit uplink control signals (such as the hybrid automatic repeat request (HARQ) feedback of the downlink data) or sounding reference signals (SRS), thereby shortening the downlink HARQ feedback delay.

[0247] Another structure is a UL-dominant slot primarily used for uplink: that is... Figure 2e In Case 4-4, the time slot is mainly used for uplink data transmission, while a small number of symbols are time-division multiplexed to transmit downlink control signals, such as uplink scheduling instructions in the physical downlink control channel (PDCCH), thereby shortening the uplink scheduling delay.

[0248] Generally, in a self-contained time slot design, both network devices and terminal devices can switch between uplink and downlink transmission within a single time slot. By reserving a protection time and not transmitting or receiving any signals during the protection time, normal operation can be guaranteed after the switch.

[0249] 5. Mini-slot.

[0250] To further reduce air interface latency, the protocol introduces the concept of microslots, whose time domain length can be less than 14 symbols. Compared to basic time slot scheduling, microslot scheduling offers finer time domain division and shorter scheduling latency. Microslot scheduling is often referred to as non-slot-based scheduling.

[0251] 6. Frequency domain resources.

[0252] A resource element (RE) is the smallest granular physical layer resource in 5G NR, which is one subcarrier in the frequency domain and one OFDM symbol in the time domain.

[0253] A resource block (RB) is the basic unit of channel resource allocation in the frequency domain in 5G NR. In the frequency domain, an RB can contain 12 subcarriers. Since the subcarrier spacing in 5G NR is variable, the actual bandwidth of an RB is also variable.

[0254] A resource grid (RG) is a collection of time-frequency resources. In 5G NR, it is defined as follows: For each carrier and its corresponding numberology, an RG is a resource set of all subcarriers in the frequency domain and all symbols within one subframe in the time domain, with the starting point in the frequency domain being RBs. Since different numberologies correspond to different SCSs, and one RB consists of 12 subcarriers, the number of RBs in an RG differs depending on the numberology for the same transmission bandwidth. An RG in the time domain is one subframe. Furthermore, uplink and downlink each define their own RGs.

[0255] like Figure 2e The diagram shown illustrates one implementation of resource allocation for RE, RB, and RG. Figure 2f In this context, a subframe in the time domain can include several OFDM symbols; an RE represents a resource with one subcarrier in the frequency domain and one OFDM symbol in the time domain; an RB contains 12 subcarriers in the frequency domain; and an RG represents a set of time-frequency resources.

[0256] A common resource block (CRB) can be understood as a collective term for all resource blocks (RBs) in 5G NR. They are numbered starting from 0, and the center frequency point of subcarrier number 0 in CRB0 is point A.

[0257] A physical resource block (PRB) refers to an RB contained in the BWP of a terminal device in 5G NR. It is also numbered starting from 0 and is the basic unit of data channel scheduling.

[0258] An RBG refers to a combination of several PRBs within a BWP, also numbered starting from 0, and is the basic unit of data channel scheduling. An RBG can contain {2, 4, 8, 16} PRBs, the specific number depending on the number of RBs in the BWP and the configuration options.

[0259] A resource element group (REG) is the basic unit of control channel resources. One REG is 12 subcarriers in the frequency domain, which is the width of one RB, and one OFDM symbol in the time domain.

[0260] The control channel element (CCE) is the basic unit for scheduling control channel resources. One CCE consists of 6 REGs in the frequency domain.

[0261] like Aggregation level The diagram shown illustrates the relationship between REG and CCE.

[0262] The above defines the time-frequency resources for NR. Future networks may use the same or different definitions. For example, future networks may define multiple subcarrier spacings, not limited to the SCS in 5G. A time slot can include one or more symbols, and an RB can include one or more subcarriers, etc.

[0263] PDCCH resources are ultimately mapped to RBs, but a single PDCCH can occupy a significant number of RBs. Describing the resources occupied by a PDCCH using RBs is inconvenient, hence the concepts of REGs and CCEs. One CCE corresponds to six REGs, and each REG corresponds to one RB, as shown in the diagram below. Both the potential resources occupied by a PDCCH and the actual resources occupied by a PDCCH are described using CCEs. For example, with a 100MHz (273RB) bandwidth and a subcarrier spacing of 30kHz within a symbol, there can be a maximum of 45 CCEs (270RBs).

[0264] Optionally, the NR system defines that the PDCCH can use {1, 2, 4, 8, 16} consecutive CCEs, where the number of CCEs used is called the aggregation level, as shown in the table below. The worse the wireless channel quality, the higher the aggregation level of the PDCCH is required to ensure the transmission quality of the PDCCH. The more CCEs used by the PDCCH, i.e., the higher the aggregation level, the better the demodulation performance, but it may also lead to resource waste. The gNodeB determines the aggregation level used by a PDCCH based on factors such as channel quality. For example, terminal equipment at the cell edge should use a PDCCH format with a larger CCE aggregation level to trade resources for demodulation performance; terminal equipment in the cell center can use a PDCCH format with a smaller CCE aggregation level to save time and frequency resources.

[0265] For example, the implementation of CCE aggregation level can be referred to the manner shown in Table 4 below.

[0266] Table 4

[0267] Number of CCEs Figure 3 1 1 2 2 4 4 8 8 16 16

[0268] Optionally, the PDCCH format for time-frequency resources is as follows:

[0269] In the time domain: {1, 2, 3} symbols occupying 1 slot.

[0270] In the frequency domain: it can be the full bandwidth, or it can be configured through parameters.

[0271] Generally, the time-frequency position of the DMRS (DMRS for PDCCH) on the PDCCH is fixed at subcarriers 1, 5, and 9 of each REG on the corresponding symbol of the PDCCH. For more efficient demodulation of the PDCCH, the DMRS of a PDCCH is mapped to one of every four subcarriers in the REG (i.e., subcarriers 1, 5, and 9 of each REG). This means that the DMRS on the PDCCH accounts for 1 / 4 of the PDCCH overhead, and the density of this reference signal is higher than 1 / 6 of that in LTE. While using PDCCH-specific DMRS increases the overhead of the reference signal, it also brings benefits, such as the ability to perform beamforming for individual terminal devices. Through beamforming of the PDCCH, the coverage and performance of the NRPDCCH are improved, which aligns with the beam-centric design philosophy of NR.

[0272] 7. Sending or receiving

[0273] The Physical Reception Link Control Channel (PRxCCH) is a physical layer control channel. Generally, standard protocols describe it from the perspective of the terminal device; it's the physical layer control channel received by the terminal device, similar in function to the PDCCH in LTE and 5G. The PRxCCH may be a new physical layer control channel introduced in next-generation communication systems (such as 6G). However, next-generation communication systems (such as 6G) may still use the PDCCH to represent the physical downlink control channel or physical transmit link control channel of the terminal device.

[0274] The Physical Reception Link Shared Channel (PRxSCH) is a physical layer data channel. Generally, standard protocols describe it from the perspective of the terminal device; it refers to the physical layer data channel received by the terminal device, similar in function to the Physical Downlink Shared Channel (PDSCH) in LTE and 5G. PRxSCH may be a new physical layer data channel introduced in next-generation communication systems (such as 6G). However, next-generation communication systems (such as 6G) may still use PDSCH to represent the physical downlink data channel or physical reception link data channel of the terminal device.

[0275] The Physical Transmission Link Control Channel (PTxCCH) is a physical layer control channel. Generally, standard protocols describe it from the perspective of the terminal device; it's the physical layer control channel transmitted by the terminal device, similar in function to the PUCCH in LTE and 5G. The PTxCCH may be a new physical layer control channel introduced in next-generation communication systems (such as 6G). However, next-generation communication systems (such as 6G) may still use PUCCH to represent the physical uplink control channel or physical transmission link control channel of the terminal device.

[0276] The Physical Transmission Link Shared Channel (PTxSCH) is a physical layer data channel. Generally, standard protocols describe it from the perspective of the terminal device; it's the physical layer data channel transmitted by the terminal device, similar in function to the PUSCH in LTE and 5G. PTxSCH may be a new physical layer data channel introduced in next-generation communication systems (such as 6G). However, next-generation communication systems (such as 6G) may still use PUSCH to represent the physical uplink data channel or physical receive link data channel of the terminal device.

[0277] Optionally, from the perspective of the terminal device, downlink can be described as receiving; and from the perspective of the terminal device, uplink can be described as sending.

[0278] Currently, in wireless communication, network devices and terminal devices need to transmit DMRS (Digital Modulation Support Module). This DMRS is used for data demodulation. For example, a network device can pre-encode data along with the DMRS and then send it to the terminal device via a wireless channel, allowing the terminal device to demodulate the data based on the DMRS.

[0279] However, how to improve the transmission performance of DMRS is a technical problem that urgently needs to be solved.

[0280] As an example, considering the communication process between network devices and terminal devices, they can transmit data through various channels or signals. Different channels or signals typically have different priorities. For instance, reference signals (such as DMRS and cell-specific reference signals, CRS) usually have higher priorities than control channels (such as PDCCH) and traffic channels (such as PDSCH). When resource conflicts occur between different channels or signals, the transmission of lower-priority channels or signals usually avoids the resources occupied by higher-priority channels or signals to improve the transmission performance of higher-priority signals. For example, NR's PDSCH avoids the resources occupied by LTE's CRS. Accordingly, in the above implementation example, the interference caused by the transmission of lower-priority channels or signals to the transmission of higher-priority channels or signals is relatively small. When higher-priority channels or signals are used to transmit data, the data transmission performance of higher-priority channels or signals can be improved through the above example.

[0281] However, in the example above, the resources occupied by low-priority channels or signals will completely give way to those occupied by high-priority channels or signals, resulting in low spectral efficiency.

[0282] As another example, taking the downlink communication process between network devices and terminal devices as an example, in an NR system, the downlink data channel can be a PDSCH. A network device can instruct a terminal device (denoted as Terminal Device 1) to perform rate matching on certain specific resources within the PDSCH, meaning that specific resources are not used for data transmission. In this way, the data transmission of the NR PDSCH is unaffected by interference from that specific resource, and / or the signal on that specific resource is unaffected by PDSCH interference, thereby improving the data transmission performance of the NR PDSCH and the transmission performance of the signal on the specific resource.

[0283] For example, on the PDSCH, different terminal devices (or different users) can transmit their respective DMRS through different DMRS CDM groups. Generally, the DMRS of different DMRS CDM groups are located in the same symbol. Accordingly, the aforementioned specific resource may include the resource occupied by a DMRS CDM group that has no data transmission, which is used for transmission in other DMRS CDM groups besides the DMRS CDM group used by terminal device 1. Interference avoidance of DMRS between terminal devices (such as users) in NR multi-user scheduling is achieved by rate matching of this specific resource.

[0284] For example, on the PDSCH, the aforementioned specific resources may include those occupied by the LTE CRS. Rate matching under LTE and NR coexistence is achieved through rate matching of this specific resource. This method can ensure that the LTE CRS is not interfered with by the PDSCH, guaranteeing the accuracy of channel estimation based on CRS by LTE terminal equipment (such as users). This method can also ensure that the PDSCH is not interfered with by the LTE CRS, guaranteeing the communication performance of the PDSCH.

[0285] For example, on the PDSCH, the aforementioned specific resources may include RB-symbol level resources. Rate matching of the NR control resource set (CORESET) is achieved through rate matching of this specific resource. This method can ensure that the CORESET is not interfered with by the PDSCH, thus guaranteeing the communication performance of the control channel. This method can also ensure that the PDSCH is not interfered with by the CORESET, thus guaranteeing the communication performance of the PDSCH.

[0286] For example, on PDSCH, the aforementioned specific resources may include ZP CSI-RS resources, and rate matching of NR CSI-RS resources can be achieved through rate matching of the specific resource.

[0287] However, the above example only provides the rate matching method for NR's PDSCH, which limits its application scenarios.

[0288] To address the aforementioned problems, this application provides a communication method and related apparatus, which will be described in detail below with reference to the accompanying drawings.

[0289] Please see Figure 3 , Figure 3 A schematic diagram illustrating an implementation of the communication method provided in this application.

[0290] It should be understood that in the following method flowchart, different communication devices (e.g., the interaction between the first device and the second device) are used as examples to illustrate the execution subject of the interaction, but this application does not limit the execution subject of the interaction. For example, any communication device (e.g., the first device, the second device, or the third device) can be a communication device, or a chip, baseband chip, modem chip, system-on-a-chip (SoC) chip containing a modem core, system-in-package (SIP) chip, communication module, chip system, processor, logic module, or software in the communication device. Optionally, the communication device can be a terminal device or a network device (e.g., the network device can be an access network device, access network element, etc.).

[0291] As an example, inFigure 3 In this configuration, the first device can be a terminal device and the second device can be a network device, or both the first device and the second device can be network devices. For example, the network device can be an access network device or a communication device in an ORAN system (e.g., at least one of CU, DU, RU).

[0292] As another example, in Figure 3 In this context, both the first and second devices are terminal devices. For example, when... Figure 3 When the scheme shown is applied to a side link communication scenario, both the first device and the second device can be terminal devices.

[0293] exist Figure 4 The communication method provided in this application includes the following steps:

[0294] S301. The first device determines a first resource of the first demodulated reference signal DMRS, wherein the first resource pattern of the first resource includes at least one or more of a first type pattern, a second type pattern, or a third type pattern, wherein the DMRS of the first type pattern occupies 3 resource units in the first frequency domain unit of the first antenna port; the DMRS of the second type pattern occupies 2 resource units in the second frequency domain unit of the second antenna port; and the DMRS of the third type pattern occupies 1 resource unit in the third frequency domain unit of the third antenna port.

[0295] S302. The first device sends or receives the first DMRS on the first resource.

[0296] Optionally, step S301 can also be replaced by: the first device determining the resource pattern of the first DMRS; or, the first device determining the type of the resource pattern of the first DMRS; or, the first device determining the frequency domain location of the first DMRS.

[0297] Optionally, step S302 can also be replaced by: the first device transmitting the first DMRS on the first resource; or, the first device transmitting data according to the first DMRS; or, the first device sending or receiving data according to the first DMRS.

[0298] Optionally, the first resource can be a DMRS resource.

[0299] Optionally, the first resource includes at least one or more of the following: time-domain resources or frequency-domain resources.

[0300] Optionally, the first resource pattern includes three types (cases) of patterns: the first type (case A), the second type (case B), and the third type (case C).

[0301] Optionally, the first type of pattern is an exemplary name and can be replaced with any possible name, such as first type, first configuration, first configuration type, first pattern, first pattern, first pattern set, first pattern mode, first mode, or first pattern type, etc. The second type and third type of patterns can also be replaced with any possible names, and can be referred to the description of the first type of pattern, which will not be repeated here.

[0302] Optionally, the resource pattern is an exemplary name and can be replaced with any possible name, such as pattern, RE pattern, subcarrier pattern, etc.

[0303] Optionally, the first resource pattern may include a subcarriers in a frequency domain unit, where a is a positive integer.

[0304] Optionally, a resource unit can be the smallest unit of time-frequency resources, and may include one or more resources in the time-frequency domain. For example, it may include one or more symbols in the time domain and one or more subcarriers in the frequency domain. For instance, a resource unit may be a resource of one symbol in the time domain and one subcarrier in the frequency domain. For example, a resource unit may be an RE, and an RE may reside in one or more resource grids (RGs). Alternatively, a resource unit may also be another implementation specified by the standard / protocol.

[0305] Optionally, the statement "The DMRS of the first type of pattern occupies 3 resource units in the first frequency domain unit of the first antenna port" is an exemplary statement and can be replaced with any possible statement. For example, it can be replaced with: The first antenna port of the DMRS of the first type of pattern occupies 3 resource units in the first frequency domain unit, or it can be replaced with: For the first type of pattern, the DMRS of the first antenna port occupies 3 resource units in the first frequency domain unit. Similarly, "The DMRS of the second type of pattern occupies 2 resource units in the second frequency domain unit of the second antenna port" and "The DMRS of the third type of pattern occupies 1 resource unit in the third frequency domain unit of the third antenna port" can also be replaced with any possible statement. For reference, see the replacement of "The DMRS of the first type of pattern occupies 3 resource units in the first frequency domain unit of the first antenna port", which will not be elaborated here.

[0306] Optionally, each of the one or more symbols has a total of 12 subcarriers in its RB, and a frequency domain unit includes 12 subcarriers located in the same symbol. For example, the first frequency domain unit includes 12 subcarriers in the same symbol, the second frequency domain unit includes 12 subcarriers in the same symbol, and the third frequency domain unit includes 12 subcarriers in the same symbol.

[0307] Optionally, the index of the 12 subcarriers can be subcarrier 0, 1, 2... or 11.

[0308] Optionally, the first DMRS includes at least one or more of the following: PDSCH DMRS, PDCCH DMRS, physical broadcast channel (PBCH) DMRS, physical uplink shared channel (PUSCH) DMRS, physical uplink control channel (PUCCH) DMRS, PRxCCH DMRS, PRxSCH DMRS, PTxCCH DMRS, PTxSCH DMRS, or DMRS of other channels / signals.

[0309] Optionally, the resource pattern of DMRS in this application includes at least one or more of the following patterns: a first resource pattern, a 5G DMRS resource pattern, an LTE DMRS resource pattern, or a 4G DMRS resource pattern. When the resource pattern of DMRS is a first resource pattern, the resource pattern of DMRS can be one or more of the first type pattern, the second type pattern, or the third type pattern.

[0310] Optionally, the first type of pattern may include one or more patterns. Optionally, the multiple patterns included in the first type of pattern may be different. For example, the first type of pattern may include pattern 1 and pattern 2, wherein the frequency domain position of the DMRS of pattern 1 is different from the frequency domain position of the DMRS of pattern 2. The second type of pattern and the third type of pattern may also include one or more patterns, as can be referred to the description of the first type of pattern, which will not be repeated here.

[0311] Optionally, the second device also needs to determine the first resource of the first demodulation reference signal DMRS.

[0312] Step S302 is described using the example of communication between the first device and the second device:

[0313] For example, when the first device sends the first DMRS, the second device receives the first DMRS; when the second device sends the first DMRS, the first device receives the first DMRS.

[0314] For example, the first device can perform data transmission based on the first DMRS. For instance, the first device needs to send DMRS during data transmission, and the DMRS is used for channel estimation and / or data demodulation. Data transmission includes data sending and / or data receiving. For example, the first device receives data from the second device, or the first device sends data to the second device. Data transmission can be signal transmission or information transmission, for example, data transmission can be control information transmission, in which case the first DMRS is used to control the channel.

[0315] As mentioned above, the resource pattern of the DMRS can have multiple possible configurations, and therefore the resources of the DMRS can also have multiple possible configurations. Therefore, the first device needs to determine the first resource of the first demodulation reference signal DMRS, i.e., it needs to execute step S301. Optionally, the first device can determine the first resource of the first demodulation reference signal DMRS in multiple ways, such as at least one of the following methods:

[0316] Method 1a: The second device sends third information, which includes relevant information about the first resource pattern, and the first device receives the third information accordingly.

[0317] In mode 1a, the second device can indicate the relevant information of the first resource pattern through the third information, so that the first device does not need to determine the first resource of the first demodulation reference signal DMRS by itself, saving the computing power required by the first device. In addition, the second device can determine the resource pattern of the first resource according to the current situation, such as the current spectrum resource occupancy, so that the second device can allocate spectrum resources more rationally.

[0318] Optionally, the third information can be used to indicate that the resource pattern of the first resource is the first resource pattern, or based on the third information, the first device can determine that the resource pattern of the first resource is the first resource pattern. For example, before S301, the first device may not be able to determine the resource pattern of the first resource. When the first device receives the third information, since the third information includes relevant information about the first resource pattern, the first device can determine that the resource pattern of the first resource is the first resource pattern.

[0319] Optionally, the third information includes first indication information, wherein the first indication information is used to indicate the design method of the resource pattern of the first resource. For example, the first indication information can be an identifier of the first resource pattern, thereby indicating that the resource pattern of the first resource adopts the design method of the first resource pattern.

[0320] Optionally, the third information includes first configuration information, which is used to configure the first resource.

[0321] Optionally, different resource patterns can correspond to different configurations:

[0322] For example, the first resource pattern corresponds to configuration 1, the 5G DMRS resource pattern corresponds to configuration 2, and the resource patterns other than the first resource pattern and the 5G resource pattern correspond to configuration 3.

[0323] Optionally, the aforementioned third information may carry a configuration identifier, which indicates whether it is used to identify configuration 1, configuration 2, or configuration 3. For example, two bits in the first configuration information may be used to carry the configuration identifier. For instance, if the first and second bits in the first configuration information are 10, it indicates configuration 1, in which case the resource pattern of the first resource is the first resource pattern. If the first and second bits in the first configuration information are 11, it indicates configuration 2, in which case the resource pattern of the first resource is the 5G DMRS resource pattern. If the first and second bits in the first configuration information are 00, it indicates configuration 3, in which case the resource pattern of the first resource is a resource pattern other than the first resource pattern and the 5G resource pattern.

[0324] For example, the first resource pattern corresponds to configuration 1, and resource patterns other than the first resource pattern correspond to configuration 4, such as the 5GDMRS resource pattern, which corresponds to configuration 4.

[0325] Optionally, the aforementioned third information may carry a configuration identifier, which indicates whether it is used to identify configuration 1 or configuration 4. For example, the third bit in the first configuration information may be used to carry the configuration identifier. For instance, if the third bit in the first configuration information is 0, it is used to identify configuration 1, in which case the resource pattern of the first resource is the first resource pattern. If the third bit in the first configuration information is 1, it is used to identify configuration 4, in which case the resource pattern of the first resource is a resource pattern other than the first resource pattern.

[0326] Optionally, the second device may send third information via higher-layer signaling, such as RRC signaling or MAC CE signaling; or, the second device may send third information via physical layer signaling, such as DCI signaling.

[0327] Method 1b: The first device determines the resource pattern of the first resource based on the communication carrier in which the first resource is located.

[0328] Compared to method 1a, in method 1b the first device does not need to interact with other devices to determine the resource pattern of the first resource, thus shortening the signaling interaction delay and reducing the signaling overhead.

[0329] Optionally, when the communication carrier is a shared carrier, the resource pattern of the first resource is the first resource pattern.

[0330] When the first carrier is a shared carrier, the first device needs to share this carrier with other devices. In this case, designing the resource pattern of the first resource as the first resource pattern can make other devices avoid the first resource, that is, not use the first resource or not map data on the first resource, so as to avoid the data transmission of other devices from interfering with the transmission of the first DMRS.

[0331] Optionally, when the communication carrier is an independent carrier, the resource pattern of the first resource is not the first resource pattern. For example, when the communication carrier is an independent carrier, the resource pattern of the first resource can be a 6G DMRS resource pattern, a 5G DMRS resource pattern, an LTE DMRS resource pattern, a 4G DMRS resource pattern, or other resource patterns, etc.

[0332] Optionally, a portion of the frequency band can be used as a shared carrier, such as the 2.8 GHz or 3.5 GHz band. When the communication carrier where the first resource is located is 2.8 GHz or 3.5 GHz, it is a shared carrier, and the first device can determine that the resource pattern of the first resource is the first resource pattern. When the communication carrier where the first resource is located is not 2.8 GHz or 3.5 GHz, it is an independent carrier, and the first device can determine that the resource pattern of the first resource is not the first resource pattern.

[0333] Optionally, this application can be applied to scenarios where the data transmission rank is single-layer or multi-layer.

[0334] Optionally, this application can be applied to scenarios where the rank bit of the channel matrix is ​​1 or greater than 1, that is, this application can be applied to scenarios where one or more data streams are transmitted in parallel.

[0335] Optionally, this application can be used in scenarios where a terminal device (such as a user) has one or more antenna ports.

[0336] The first resource pattern in this application is described below:

[0337] In one possible implementation, the first resource pattern in this application is associated with a resource pattern of NZP-CSI-RS or a resource pattern of ZP-CSI-RS. For example, the association may include at least one of the following:

[0338] 1. The first resource pattern is one or more of the resource patterns of NZP-CSI-RS;

[0339] 2. The first resource pattern is one or more of the resource patterns in ZP-CSI-RS;

[0340] 3. The first resource occupies b subcarriers on the first symbol, and the distribution of these b subcarriers is the same as the distribution of the NZP-CSI-RS resource occupying c subcarriers on the second symbol, or the spacing between the subcarriers is the same, where b is greater than 0 and is a positive integer, c is greater than 0 and is a positive integer, and the first and second symbols are one symbol in the time domain; or,

[0341] 4. The first resource occupies d subcarriers on the third symbol. The distribution of these d subcarriers is the same as the distribution of the ZP-CSI-RS resource occupying e subcarriers on the fourth symbol, or the interval between the subcarriers is the same. Here, d is greater than 0 and is a positive integer, e is greater than 0 and is a positive integer, and the third and fourth symbols are one symbol in the time domain.

[0342] The above implementation method can reduce the interference of other signals or channels on 6G DMRS and improve communication performance.

[0343] It should be noted that although the first resource pattern can be one or more of the resource patterns of NZP-CSI-RS, this application does not limit the time domain location of the first resource to be the same as that of the NZP-CSI-RS resource, and the time domain location of the first resource can also be different from that of the NZP-CSI-RS resource.

[0344] Optionally, the resource pattern of NZP-CSI-RS is the resource pattern of 5G NZP-CSI-RS.

[0345] Optionally, the resource pattern of ZP-CSI-RS is the resource pattern of 5G ZP-CSI-RS.

[0346] For example, when the first device and the third device share the spectrum and the communication carrier of the first DMRS is a shared carrier, since the first resource pattern is one or more of the NZP-CSI-RS resource patterns, the second device will send the resource location of ZP-CSI-RS to the third device, that is, the resource location of the first resource. The third device avoids the first resource, that is, does not use the first resource. In this way, while reducing the interference of the data transmission of the third device on the transmission of the first DMRS, the control channel resources can be utilized as much as possible for data transmission, so as to improve resource utilization and spectrum efficiency.

[0347] by Figure 4 For example, Figure 5Taking a scenario where the first device is a 6G terminal device, the second device can be a 5G terminal device, and the third device is an access network device shared by both the 6G and 5G terminal devices, when the DMRS resource pattern of the 6G terminal device is one or more of the NZP-CSI-RS resource patterns, the access network device will send the ZP-CSI-RS resource location to the 5G terminal device. This allows the 5G terminal device to perform rate matching on the 6G terminal device's DMRS during data transmission, meaning it doesn't use the 6G terminal device's DMRS resources. This avoids interference between 5G data transmission and 6G DMRS transmission, enabling spatial multiplexing of the MU between the 5G and 6G UEs and improving communication performance.

[0348] Optionally, the network device communicating with the 6G terminal device and the network device communicating with the 5G terminal device can be the same network device or different network devices.

[0349] For example, the first device is a 6G terminal device, the second device can be a 5G terminal device, the third device is a network device communicating with the 6G terminal device, and the fourth device is a network device communicating with the 5G terminal device. The third device can configure or indicate the first resource of the first DMRS to the first device. The third device informs the fourth device of the first resource of the first DMRS. The fourth device can configure or indicate the ZP CSI-RS resource to the second device for rate matching. The ZP CSI-RS resource is the same as the first resource of the first DMRS, or the ZP CSI-RS resource includes the first resource of the first DMRS. This avoids interference between 5G data transmission and 6G DMRS transmission, realizes MU spatial multiplexing between 5G UE and 6G UE, and improves communication performance.

[0350] Optionally, the second device may transmit ZP CSI-RS resource locations periodically, semi-persistently, or aperiodically.

[0351] Optionally, the ZP CSI-RS resource location can be the location of the first resource, or the location of a resource shared by the first device and the second device within the first resource.

[0352] As can be seen from the above process, for communication between the third device and the second device, the first resource can be an unused time-frequency resource.

[0353] For example, the third device, through rate matching, does not map data communicating with the second device on the first resource (or determines not to map data communicating with the second device on the first resource).

[0354] Please see Figure 5 , Figure 5Taking the first device as a 6G terminal device and the second device as a 5G terminal device as an example, the 5G terminal device and the 6G terminal device are as follows: Figure 5 The RB resources shown are categorized as follows: dark gray represents the resources occupied by the DMRS of the PDSCH of 5G terminal devices, and light gray represents the resources occupied by the DMRS of the PDSCH of 6G terminal devices. For example... Figure 6a As shown in the bottom right corner, 5G PDSCH cannot map data on the resources occupied by 6G DMRS.

[0355] For example, after mapping data on the first resource, the third device can punch (or delete, ignore, etc.) the bits carried by the first resource.

[0356] Optionally, the data transmission of the third device can be rate-matched to the first DMRS.

[0357] For example, the third device can perform rate matching on the first DMRS when transmitting PDSCH or PDCCH.

[0358] For example, the third device can perform rate matching on the first DMRS when transmitting PUSCH or PUCCH.

[0359] The above provides an overall overview of the first resource pattern, which includes at least one or more of the first, second, or third type of patterns. The following section provides a detailed description of the first, second, or third type of patterns.

[0360] As mentioned above, from the frequency domain perspective, the DMRS of the first type of pattern occupies 3 resource units in the first frequency domain unit of the first antenna port; the DMRS of the second type of pattern occupies 2 resource units in the second frequency domain unit of the second antenna port; and the DMRS of the third type of pattern occupies 1 resource unit in the third frequency domain unit of the third antenna port.

[0361] Optionally, the number of resource units corresponding to the second type of pattern can include multiple cases, such as at least one of the following:

[0362] Case 1a: Code division multiplexing exists in the frequency domain but not in the time domain. For example, there are two REs in the frequency domain performing orthogonal mask code division multiplexing, but no orthogonal mask code division multiplexing exists in the time domain.

[0363] In one possible implementation of case 1a, the second antenna port of the DMRS of the second type of pattern occupies two resource units in one symbol in the time domain and one frequency domain unit in the frequency domain.

[0364] Case 1b: Code division multiplexing exists in both the frequency and time domains. For example, there are two REs performing orthogonal mask code division multiplexing in the frequency domain and two REs performing orthogonal mask code division multiplexing in the time domain.

[0365] For case 1b, in one possible implementation, the second antenna port of the DMRS of the second type of pattern occupies 4 resource units in two symbols in the time domain and one frequency domain unit in the frequency domain.

[0366] Optionally, as can be seen from the above implementation, the DMRS of the first resource pattern occupies 1, 2, 3, or 4 resource units in the fourth frequency domain unit of the fourth antenna port. Specifically, when orthogonal mask code division multiplexing is not performed in the time domain of the DMRS, the DMRS of the first resource pattern can occupy 1, 2, or 3 resource units in the fourth frequency domain unit of the fourth antenna port. When orthogonal mask code division multiplexing is performed in the time domain of the DMRS, the DMRS of the first resource pattern can occupy 4 resource units in the fourth frequency domain unit of the fourth antenna port.

[0367] Optionally, the number of code division multiplexing groups corresponding to different cases (i.e., different types of first resource patterns) may be different, and can be at least one of the following implementation methods:

[0368] In one possible implementation, the first frequency domain unit includes at most 4 code division multiplexing groups; and / or, the second frequency domain unit includes at most 12 code division multiplexing groups; and / or, the third frequency domain unit includes at most 12 code division multiplexing groups.

[0369] The above implementation provides various correspondences between frequency domain units and code division multiplexing (CDM) groups, thus designing multiple CDM schemes. This allows for the selection of one or more CDM schemes based on the needs of the terminal device (e.g., the user) or the current network environment, thereby improving communication performance.

[0370] Optionally, the first device and other devices (or other terminal equipment / users) can transmit their respective DMRS through different DMRS CDM groups, typically with DMRS from different DMRS CDM groups located on the same symbol. Interference avoidance between DMRS of users scheduled by NR multi-user MU is achieved through rate matching of this specific resource. For example, this specific resource may include resources occupied by DMRS code division multiplexing groups without data transmission, which are used for transmission in other DMRS CDM groups besides the one used by the first device.

[0371] Optionally, when the DMRS includes h code division multiplexing groups in a frequency domain unit, then h terminal devices (e.g., users) can multiplex that frequency domain unit, where h is a positive integer. For example, when the first frequency domain unit of the DMRS in the first pattern includes 4 code division multiplexing groups, then 4 terminal devices (e.g., users) can multiplex that first frequency domain unit.

[0372] The number of code division multiplexing groups corresponding to the second type of pattern can include multiple cases, such as at least one of the following:

[0373] Case 2a: When the first DMRS is a single symbol, the second frequency domain unit of the second type pattern DMRS includes at most 6 code division multiplexing groups.

[0374] In case 2a, since the number of symbols occupied by the first DMR is small, the overhead caused by the first DMR is small.

[0375] Optionally, the above "the first DMRS is a single symbol" can also be replaced with: a group of first DMRS resources occupies one symbol.

[0376] Case 2b: When the first DMRS is a double symbol, the second frequency domain unit of the second type pattern DMRS includes at most 6 code division multiplexing groups or 12 code division multiplexing groups.

[0377] In case 2b, the first DMRS is a double symbol. Therefore, when channel estimation is performed using the first DMRS, the channel estimation result is more accurate, which can improve communication performance.

[0378] Optionally, the above "the first DMRS is a double symbol" can also be replaced with: a group of first DMRS resources occupies two symbols.

[0379] Optionally, in case 2, when there are two REs performing orthogonal mask code division multiplexing in the frequency domain of the DMRS of the second type of pattern, but no orthogonal mask code division multiplexing in the time domain, the second frequency domain unit of the DMRS of the second type of pattern includes at most 12 code division multiplexing groups; when there are two REs performing orthogonal mask code division multiplexing in the frequency domain and two REs performing orthogonal mask code division multiplexing in the time domain of the DMRS of the second type of pattern, the second frequency domain unit of the DMRS of the second type of pattern includes at most 6 code division multiplexing groups.

[0380] For ease of description, the second type of pattern corresponding to the first DMRS being a single symbol is called the first pattern. The second type of pattern corresponding to the first DMRS being a double symbol, and having two REs in the frequency domain for orthogonal mask code division multiplexing, but no orthogonal mask code division multiplexing in the time domain, is called the second pattern. The second type of pattern corresponding to the first DMRS being a double symbol, and having two REs in the frequency domain for orthogonal mask code division multiplexing, and two REs in the time domain for orthogonal mask code division multiplexing, is called the third pattern.

[0381] Optionally, the first device may determine the number of CDM groups in a variety of optional ways, such as including at least one of the following:

[0382] Method 2a: The first device can determine the number of CDM groups occupied by the first DMRS on a frequency domain unit according to the type of the first resource pattern.

[0383] Optionally, there is a correlation between the type of the first resource pattern and the number of CDM groups occupied by the first DMRS in a frequency domain unit, or the type of the first resource pattern and the number of CDM groups occupied by the first DMRS in a frequency domain unit are related.

[0384] For example, if the first device receives first information indicating that the first resource pattern is the first type of pattern, the first device can determine that the number of CDM groups occupied by the first DMRS on a frequency domain unit is one or more of 1-4.

[0385] In mode 2a, the first device can directly determine the number of CDM groups based on the type of the first resource pattern, without the need for signaling transmission related to the number of CDM groups, thus saving signaling overhead.

[0386] Method 2b: It is possible to pre-define or indicate at least one of the following: the number of CDM groups corresponding to the first frequency domain unit of the DMRS of the first type of pattern, the number of CDM groups corresponding to the second frequency domain unit of the DMRS of the second type of pattern, or the number of CDM groups corresponding to the third frequency domain unit of the DMRS of the third type of pattern.

[0387] For example, the protocol may specify that the first frequency domain unit may include 2 or 4 CDM groups, or the protocol may specify that the second frequency domain unit may include 3 or 6 CDM groups, or the protocol may specify that the third frequency domain unit may include 6 or 12 CDM groups; for example, the second device may send second configuration information to the first device, which is used to configure the number of CDM groups corresponding to the first frequency domain unit, the number of CDM groups corresponding to the second frequency domain unit, or the number of CDM groups corresponding to the third frequency domain unit; or, the second device may send second indication information to the first device, which indicates the number of CDM groups corresponding to the first frequency domain unit, and / or the number of CDM groups corresponding to the second frequency domain unit or the number of CDM groups corresponding to the third frequency domain unit.

[0388] In method 2a, the first device does not need to determine the number of CDM groups itself, thus saving the computing power consumed by the first device.

[0389] Optionally, the second device may send second indication information or second configuration information via higher-layer signaling, such as RRC signaling or MAC CE signaling; or, the second device may send second indication information or second configuration information via physical layer signaling, such as DCI signaling.

[0390] Optionally, the aforementioned third information may include second instruction information or second configuration information.

[0391] Optionally, different cases (i.e., different types of first resource patterns) may correspond to different code division multiplexing groups, as shown in the following examples:

[0392] As an example, the code division multiplexing blocks included in the first frequency domain unit of the DMRS of the first type of pattern can be implemented in several ways, for example, including at least one or more of the following:

[0393] 1. The first frequency domain unit of the DMRS of the first type of pattern includes CDM group 1a. For example, the resource pattern of the first frequency domain unit of the DMRS of the first type of pattern is as follows: Figure 6a As shown in 6a-1 (for example, CDM group 1a occupies subcarriers 0, 4, and 8 of the first frequency domain unit);

[0394] 2. The first frequency domain unit of the DMRS of the first type of pattern includes CDM group 1b. For example, the resource pattern of the first frequency domain unit of the DMRS of the first type of pattern is as follows: Figure 6a As shown in 6a-2 (for example, CDM group 1b occupies subcarriers 1, 5, and 9 of the first frequency domain unit);

[0395] 3. The first frequency domain unit of the DMRS of the first type of pattern includes CDM group 1c. For example, the resource pattern of the first frequency domain unit of the DMRS of the first type of pattern is as follows: Figure 6a As shown in 6a-3 (for example, CDM group 1c occupies subcarriers 2, 6, and 10 of the first frequency domain unit);

[0396] 4. The first frequency domain unit of the DMRS of the first type of pattern includes CDM group 1d. For example, the resource pattern of the first frequency domain unit of the DMRS of the first type of pattern is as follows: Figure 6b As shown in 6a-4 (for example, CDM group 1d occupies subcarriers 3, 7, and 11 of the first frequency domain unit);

[0397] 5. The first frequency domain unit of the DMRS of the first type of pattern includes CDM group 1a and CDM group 1b. For example, the resource pattern of the first frequency domain unit of the DMRS of the first type of pattern can be... Figure 6b 6b-1 in;

[0398] 6. The first frequency domain unit of the DMRS of the first type of pattern includes CDM group 1a and CDM group 1c. For example, the resource pattern of the first frequency domain unit of the DMRS of the first type of pattern can be... Figure 6b 6b-2 in;

[0399] 7. The first frequency domain unit of the DMRS of the first type of pattern includes CDM group 1a and CDM group 1d. For example, the resource pattern of the first frequency domain unit of the DMRS of the first type of pattern can be... Figure 6b 6b-3 in;

[0400] 8. The first frequency domain unit of the DMRS of the first type of pattern includes CDM group 1b and CDM group 1c. For example, the resource pattern of the first frequency domain unit of the DMRS of the first type of pattern can be... Figure 6b 6b-4 in;

[0401] 9. The first frequency domain unit of the DMRS of the first type of pattern includes CDM group 1b and CDM group 1d. For example, the resource pattern of the first frequency domain unit of the DMRS of the first type of pattern can be... Figure 6b 6b-5 in the middle;

[0402] 10. The first frequency domain unit of the DMRS of the first type of pattern includes CDM group 1c and CDM group 1d. For example, the resource pattern of the first frequency domain unit of the DMRS of the first type of pattern can be... Figure 6c 6b-6 in;

[0403] 11. The first frequency domain unit of the DMRS of the first type of pattern includes CDM group 1a, CDM group 1b and CDM group 1c. For example, the resource pattern of the first frequency domain unit of the DMRS of the first type of pattern can be... Figure 6c 6c-1 in;

[0404] 12. The first frequency domain unit of the DMRS of the first type of pattern includes CDM group 1a, CDM group 1b and CDM group 1d. For example, the resource pattern of the first frequency domain unit of the DMRS of the first type of pattern can be... Figure 6b 6c-2 in;

[0405] 13. The first frequency domain unit of the DMRS of the first type of pattern includes CDM group 1a, CDM group 1c and CDM group 1d. For example, the resource pattern of the first frequency domain unit of the DMRS of the first type of pattern is as follows: Figure 6b As shown in 6c-3;

[0406] 14. The first frequency domain unit of the DMRS of the first type of pattern includes CDM group 1b, CDM group 1c and CDM group 1d. For example, the resource pattern of the first frequency domain unit of the DMRS of the first type of pattern is as follows: Figure 6d As shown in 6c-4; or,

[0407] 15. The first frequency domain unit of the DMRS of the first type of pattern includes CDM group 1a, CDM group 1b, CDM group 1c and CDM group 1d. For example, the resource pattern of the first frequency domain unit of the DMRS of the first type of pattern is as follows: Figure 6d As shown.

[0408] Among them, implementation methods 1 to 4 are examples of the first frequency domain unit of the first type of pattern DMRS including one CDM group. These implementation methods can reduce interference between different terminal devices (such as users).

[0409] Optionally, as mentioned above, the DMRS of the first type of pattern has at most four CDM groups on a single frequency domain unit, for example... Figures 6a-6d The CDM groups are 1a, 1b, 1c, and 1d. When the DMRS of the first type of pattern has only one CDM group in a frequency domain unit, and this CDM group can be any one of the four CDM groups, there are four implementation methods, namely implementation method 1 to implementation method 4.

[0410] Among them, implementation methods 5 to 10 are examples of the first frequency domain unit of the DMRS of the first type of pattern including 2 CDM groups. In these implementation methods, the number of CDM groups included in one frequency domain unit is small. Therefore, while realizing the multiplexing of frequency domain units by terminal devices (such as users), the interference between different terminal devices (such as users) can be kept at a low level.

[0411] Optionally, as mentioned above, the DMRS of the first type of pattern has at most 4 CDM groups in a frequency domain cell. When the DMRS of the first type of pattern has 2 CDM groups in a frequency domain cell, and these two CDM groups can be any two of the 4 CDM groups, there are 6 implementation methods, namely implementation methods 5 to 10.

[0412] Among them, implementation methods 11 to 14 are examples of the first frequency domain unit of the first type of pattern DMRS including 3 CDM groups. In these implementation methods, one frequency domain unit includes a large number of CDM groups, so the spectrum utilization can be improved while keeping the interference between different terminal devices (such as users) at an acceptable level.

[0413] Optionally, as mentioned above, the DMRS of the first type of pattern has at most 4 CDM groups in a frequency domain unit. When the DMRS of the first type of pattern has 3 CDM groups in a frequency domain unit, and these 3 CDM groups can be any combination of 3 of the 4 CDM groups, there are 4 implementation methods, namely implementation method 11 to implementation method 14.

[0414] Among them, implementation method 15 is an example in which the first frequency domain unit of the DMRS of the first type of pattern includes 4 CDM groups. In these implementation methods, one frequency domain unit includes a large number of CDM groups, which can improve the utilization of the spectrum.

[0415] Optionally, the first code division multiplexing group mentioned above includes at least one or more of the following: CDM group 1a, CDM group 1b, CDM group 1c or CDM group 1d.

[0416] Optionally, different CDM groups correspond to different frequency domain positions.

[0417] For example, CDM group 1b as a whole is offset by 1 subcarrier relative to CDM group 1a as a whole, CDM group 1c as a whole is offset by 1 subcarrier relative to CDM group 1b as a whole, and CDM group 1d as a whole is offset by 1 subcarrier relative to CDM group 1c as a whole.

[0418] For example, Figures 6a-6d In the first frequency domain unit, CDM group 1a occupies subcarriers 0, 4, and 8; CDM group 1b occupies subcarriers 1, 5, and 9; CDM group 1c occupies subcarriers 2, 6, and 10; or CDM group 1d occupies subcarriers 3, 7, and 11. Figures 6a-6d The frequency domain location corresponding to the CDM group in the example is only for illustration and is not limited in this application.

[0419] Optionally, the antenna ports corresponding to any two CDM groups in CDM group 1a, CDM group 1b, CDM group 1c, and CDM group 1d are different.

[0420] Optionally, a code division multiplexing group included in the first frequency domain unit of the DMRS of the first type of pattern may correspond to an antenna port.

[0421] For example, Figures 6a-6d In the diagram, CDM group 1a corresponds to antenna port 0, CDM group 1b corresponds to antenna port 1, CDM group 1c corresponds to antenna port 2, and CDM group 1d corresponds to antenna port 3. Figure 7a The antenna port number corresponding to the CDM group in the example is only for illustration and is not limited in this application.

[0422] For example, CDM group 1a corresponds to antenna port a1, CDM group 1b corresponds to antenna port b1, CDM group 1c corresponds to antenna port c1, or CDM group 1d corresponds to antenna port d1. Where a1, b1, c1, and d1 are integers greater than or equal to 0. a1, b1, c1, or d1 can be the same or different.

[0423] As an example, when the second type pattern is the first pattern, the code division multiplexing group included in the second frequency domain unit of the DMRS of the second type pattern can be implemented in various ways. For example, the implementation may include at least one or more of the following:

[0424] 1. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern is as follows: Figure 7a As shown in 7a-1 (for example, CDM group 2a occupies subcarrier 0 and subcarrier 1 in the second frequency domain unit);

[0425] 2. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2b. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern is as follows: Figure 7a As shown in 7a-2 (for example, CDM group 2b occupies subcarrier 2 and subcarrier 3 in the second frequency domain unit);

[0426] 3. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2c. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern is as follows: Figure 7a As shown in 7a-3 (for example, CDM group 2c occupies subcarrier 4 and subcarrier 5 in the second frequency domain unit);

[0427] 4. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2b. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern is as follows: Figure 7a As shown in 7a-4 (for example, CDM group 2d occupies subcarriers 6 and 7 of the second frequency domain unit);

[0428] 5. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2e. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern is as follows: Figure 7a As shown in 7a-5 (for example, CDM group 2e occupies subcarriers 8 and 9 in the second frequency domain unit);

[0429] 6. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern is as follows: Figure 7b As shown in 7a-6 (for example, CDM group 2f occupies subcarriers 10 and 11 of the second frequency domain unit);

[0430] 7. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a and CDM group 2b. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern is as follows: Figure 7b As shown in 7b-1;

[0431] 8. The second frequency domain unit of the DMRS of the second type includes CDM group 2a and CDM group 2c. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type is as follows: Figure 7b As shown in 7b-2;

[0432] 9. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a and CDM group 2d. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern is as follows: Figure 7b As shown in 7b-3;

[0433] 10. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a and CDM group 2e. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern is as follows: Figure 7b As shown in 7b-4;

[0434] 11. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a and CDM group 2f. The resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7b 7b-5 in the middle;

[0435] 12. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2b and CDM group 2c. The resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7b 7b-6 in;

[0436] 13. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2b and CDM group 2d. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7b 7b-7 in the middle;

[0437] 14. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2b and CDM group 2e. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7b 7b-8 in the middle;

[0438] 15. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2b and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7b 7b-9 in the middle;

[0439] 16. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2c and CDM group 2d. The resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7b 7b-10 in the middle;

[0440] 17. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2c and CDM group 2e. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7b 7b-11 in the middle;

[0441] 18. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2c and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7b 7b-12 in the middle;

[0442] 19. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2d and CDM group 2e. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7b 7b-13 in the middle;

[0443] 20. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2d and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7b-14 in the middle;

[0444] 21. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2e and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7b-15 in the middle;

[0445] 22. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2b, and CDM group 2c. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7c-1 in;

[0446] 23. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2b and CDM group 2d. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7c-2 in;

[0447] 24. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2b and CDM group 2e. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7c-3 in;

[0448] 25. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2b, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7c-4 in;

[0449] 26. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2c, and CDM group 2d. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7c-5 in;

[0450] 27. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2c, and CDM group 2e. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7c-6 in;

[0451] 28. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2c, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7c-7 in;

[0452] 29. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2d, and CDM group 2e. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7c-8 in;

[0453] 30. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2d, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7c-9 in;

[0454] 31. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2e, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7c-10 in;

[0455] 32. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2b, CDM group 2c, and CDM group 2d. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7c-11 in;

[0456] 33. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2b, CDM group 2c and CDM group 2e. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7c-12 in;

[0457] 34. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2b, CDM group 2c, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7c-13 in;

[0458] 35. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2b, CDM group 2d, and CDM group 2e. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7c-14 in;

[0459] 36. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2b, CDM group 2d, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7c-15 in;

[0460] 37. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2b, CDM group 2e, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7c-16 in;

[0461] 38. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2c, CDM group 2d, and CDM group 2e. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7c 7c-17 in;

[0462] 39. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2c, CDM group 2d, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7d 7c-18 in;

[0463] 40. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2c, CDM group 2e, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7d 7c-19 in;

[0464] 41. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2d, CDM group 2e, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7d 7c-20 in;

[0465] 42. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2b, CDM group 2c and CDM group 2d. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7d 7d-1 in;

[0466] 43. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2b, CDM group 2c and CDM group 2e. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7d 7d-2 in;

[0467] 44. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2b, CDM group 2c and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7d 7d-3 in;

[0468] 45. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2b, CDM group 2d and CDM group 2e. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7d 7d-4 in;

[0469] 46. ​​The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2b, CDM group 2d and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7d 7d-5 in;

[0470] 47. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2b, CDM group 2e and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7d 7d-6 in;

[0471] 48. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2c, CDM group 2d and CDM group 2e. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7d 7d-7 in;

[0472] 49. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2c, CDM group 2d and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7d 7d-8 in;

[0473] 50. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2c, CDM group 2e and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7d 7d-9 in;

[0474] 51. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2d, CDM group 2e, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7d 7d-10 in;

[0475] 52. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2b, CDM group 2c, CDM group 2d and CDM group 2e. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7d 7d-11 in;

[0476] 53. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2b, CDM group 2c, CDM group 2d and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7e 7d-12 in;

[0477] 54. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2b, CDM group 2c, CDM group 2e, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7e 7d-13 in;

[0478] 55. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2b, CDM group 2d, CDM group 2e, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7e 7d-14 in;

[0479] 56. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2c, CDM group 2d, CDM group 2e, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7e 7d-15 in;

[0480] 57. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2b, CDM group 2c, CDM group 2d, and CDM group 2e. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7e 7e-1 in;

[0481] 58. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2b, CDM group 2c, CDM group 2d, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7e 7e-2 in;

[0482] 59. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2b, CDM group 2c, CDM group 2e, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7f 7e-3 in;

[0483] 60. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2b, CDM group 2d, CDM group 2e, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figure 7f7e-4 in;

[0484] 61. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2c, CDM group 2d, CDM group 2e, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figures 7a-7f 7e-5 in;

[0485] 62. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2b, CDM group 2c, CDM group 2d, CDM group 2e, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figures 7a-7f 7e-6 in; or,

[0486] 63. The second frequency domain unit of the DMRS of the second type of pattern includes CDM group 2a, CDM group 2b, CDM group 2c, CDM group 2d, CDM group 2e, and CDM group 2f. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be... Figures 7a-7f .

[0487] Among them, implementation methods 1 to 6 are examples of the second frequency domain unit of the second type of pattern DMRS including one CDM group. These implementation methods can reduce interference between different terminal devices (such as users).

[0488] Optionally, as mentioned above, the second type of pattern's DMRS can have a maximum of 6 CDM groups on a single frequency domain unit, for example... Figures 7a-7f The CDM groups are 2a, 2b, 2c, 2d, 2e, and 2f. When the DMRS of the second type pattern has only one CDM group in a frequency domain unit, and this CDM group can be any one of the six CDM groups, there are six implementation methods, namely implementation method 1 to implementation method 6.

[0489] Among them, implementation methods 7 to 21 are examples of the second frequency domain unit of the second type of pattern DMRS including two CDM groups. In these implementation methods, the number of CDM groups included in one frequency domain unit is small. Therefore, while enabling terminal devices (such as users) to reuse frequency domain units, the interference between different terminal devices (such as users) can be kept at a low level.

[0490] Optionally, as mentioned above, the second type of pattern DMRS has at most 6 CDM groups in a frequency domain cell. When the second type of pattern DMRS has 2 CDM groups in a frequency domain cell, and these 2 CDM groups can be any two of the 6 CDM groups, there are 15 implementation methods, namely implementation methods 7 to 21.

[0491] Among them, implementations 22 to 41 are examples of the second frequency domain unit of the second type of pattern DMRS including 3 CDM groups. In these implementations, one frequency domain unit includes a large number of CDM groups, so the spectrum utilization can be improved while keeping the interference between different terminal devices (such as users) at an acceptable level.

[0492] Optionally, as mentioned above, the second type of pattern DMRS has at most 6 CDM groups in a frequency domain unit. When the second type of pattern DMRS has 3 CDM groups in a frequency domain unit, and these 3 CDM groups can be any combination of 3 of the 6 CDM groups, there are 20 implementation methods, namely implementation methods 22 to 41.

[0493] Among them, implementation methods 42 to 56 are examples of the second frequency domain unit of the second type of pattern DMRS including 4 CDM groups. In these implementation methods, one frequency domain unit includes a large number of CDM groups, which can improve the utilization rate of the spectrum to a certain extent.

[0494] Optionally, as mentioned above, the second type of pattern DMRS has at most 6 CDM groups in a frequency domain cell. When the second type of pattern DMRS has 4 CDM groups in a frequency domain cell, and these 4 CDM groups can be any combination of 4 of the 6 CDM groups, there are 15 implementation methods, namely implementation methods 42 to 56.

[0495] Among them, implementation methods 57 to 62 are examples of the second frequency domain unit of the second type of pattern DMRS including 5 CDM groups. In these implementation methods, one frequency domain unit includes a large number of CDM groups, which can improve the utilization of the spectrum.

[0496] Optionally, as mentioned above, the second type of pattern DMRS has at most 6 CDM groups in a frequency domain unit. When the second type of pattern DMRS has 5 CDM groups in a frequency domain unit, and these 4 CDM groups can be any combination of 5 of the 6 CDM groups, there are 6 implementation methods, namely implementation methods 57 to 62.

[0497] Among them, implementation method 63 is an example of the second frequency domain unit of the second type pattern of DMRS including 6 CDM groups. In this implementation method, one frequency domain unit includes a large number of CDM groups, which can greatly improve the utilization of the spectrum.

[0498] Optionally, the second code division multiplexing group mentioned above includes at least one or more of the following: CDM group 2a, CDM group 2b, CDM group 2c, CDM group 2d, CDM group 2e or CDM group 2f.

[0499] Optionally, different CDM groups correspond to different frequency domain positions.

[0500] For example, CDM group 2b as a whole is offset by 1 subcarrier relative to CDM group 2a as a whole, CDM group 2c as a whole is offset by 1 subcarrier relative to CDM group 2b as a whole, CDM group 2d as a whole is offset by 1 subcarrier relative to CDM group 2c as a whole, CDM group 2e as a whole is offset by 1 subcarrier relative to CDM group 2d as a whole, and CDM group 2f as a whole is offset by 1 subcarrier relative to CDM group 2e as a whole.

[0501] For example, Figure 8 In the second frequency domain resource unit, CDM group 2a occupies subcarrier 0 and subcarrier 1, CDM group 2b occupies subcarrier 2 and subcarrier 3, CDM group 2c occupies subcarrier 4 and subcarrier 5, CDM group 2d occupies subcarrier 6 and subcarrier 7, CDM group 2e occupies subcarrier 8 and subcarrier 9, or CDM group 2f occupies subcarrier 10 and subcarrier 11. Figure 8 The frequency domain location corresponding to the CDM group in the example is only for illustration and is not limited in this application.

[0502] Optionally, any two CDM groups in CDM group 2a, CDM group 2b, CDM group 2c, CDM group 2d, CDM group 2e, and CDM group 2f may have different antenna ports.

[0503] Optionally, a code division multiplexing group included in the second frequency domain unit of the DMRS in the first pattern may correspond to one or two antenna ports.

[0504] For example, Figure 8 CDM group 2a corresponds to antenna port 0 and / or port 1, CDM group 2b corresponds to antenna port 2 and / or port 3, CDM group 2c corresponds to antenna port 4 and / or port 5, CDM group 2d corresponds to antenna port 6 and / or port 7, CDM group 2e corresponds to antenna port 8 and / or port 9, and CDM group 2f corresponds to antenna port 10 and / or port 11. Figure 8 The antenna port number corresponding to the CDM group in the example is only for illustration and is not limited in this application.

[0505] Optionally, two CDM groups (CDM group 2a, CDM group 2b, CDM group 2c, CDM group 2d, CDM group 2e, and CDM group 2f) may have the same antenna port.

[0506] For example, CDM group 2a corresponds to antenna ports a2 and / or b2, CDM group 2b corresponds to antenna ports c2 and / or d2, CDM group 2c corresponds to antenna ports e2 and / or f2, CDM group 2d corresponds to antenna ports g2 and / or h2, CDM group 2e corresponds to antenna ports i2 and / or j2, or CDM group 2f corresponds to antenna ports k2 and / or l2. Where a2, b2, c2, d2, e2, f2, g2, h2, i2, j2, k2, and l2 are integers greater than or equal to 0. Where a2, b2, c2, d2, e2, f2, g2, h2, i2, j2, k2, or l2 can be the same or different.

[0507] As an example, when the second type pattern is a second pattern, the code division multiplexing group included in the second frequency domain unit of the DMRS of the second type pattern can be implemented in various ways. For example, the implementation can include at least one or more of the following:

[0508] 1. The second frequency domain unit of the DMRS of the second type includes 12 CDM groups. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type can be... Figure 8 , Figure 8 Ports can be numbered either by first using the time domain and then the frequency domain, or by first using the frequency domain and then the time domain. This application does not limit the specific method of port numbering.

[0509] 2. The second frequency domain unit of the DMRS of the second type of pattern includes 11 CDM groups. Optionally, these 11 CDM groups can be... Figure 8 The combination of any 11 CDM groups shown can be, for example, a combination of CDM group 3a, CDM group 3b, CDM group 3c, CDM group 3d, CDM group 3e, CDM group 3f, CDM group 3g, CDM group 3h, CDM group 3i, CDM group 3j, and CDM group 3k, or a combination of CDM group 3a, CDM group 3b, CDM group 3c, CDM group 3d, CDM group 3e, CDM group 3f, CDM group 3g, CDM group 3h, CDM group 3i, CDM group 3j, and CDM group 3l, etc.

[0510] 3. The second frequency domain unit of the DMRS of the second type of pattern includes 10, 9, 8... or 2 CDM groups. Optionally, these 10 CDM groups can be... Figure 8 A combination of any 10 CDM groups shown; optionally, these 9 CDM groups can be... Figure 8The combination of any 9 CDM groups shown; optionally, these 8 CDM groups can be... Figure 8 The combination of any 8 CDM groups shown; optionally, these 7 CDM groups can be... Figure 8 The combination of any 7 CDM groups shown; optionally, these 6 CDM groups can be... Figure 8 The combination of any 6 CDM groups shown; optionally, these 5 CDM groups can be... Figure 8 The combination of any 5 CDM groups shown; optionally, these 4 CDM groups can be... Figure 8 The combination of any four CDM groups shown; optionally, these three CDM groups can be... Figure 8 The combination of any three CDM groups shown; optionally, these two CDM groups can be... Figure 9 The combination of any two CDM groups shown.

[0511] 4. The second frequency domain unit of the DMRS of the second type of pattern includes one CDM group. Optionally, this one CDM group can be... Figure 9 Any one of the CDM groups shown.

[0512] Optionally, the second code division multiplexing group mentioned above includes at least one or more of the following: CDM group 3a, CDM group 3b, CDM group 3c, CDM group 3d, CDM group 3e, CDM group 3f, CDM group 3g, CDM group 3h, CDM group 3i, CDM group 3j, CDM group 3k or CDM group 3l.

[0513] Optionally, different CDM groups correspond to different frequency domain positions.

[0514] For example, CDM group 3b as a whole is offset by 1 subcarrier relative to CDM group 3a as a whole, CDM group 3c as a whole is offset by 1 subcarrier relative to CDM group 3b as a whole, and CDM group 3d as a whole is offset by 1 subcarrier relative to CDM group 3c as a whole, etc. Figure 9 The frequency domain location corresponding to the CDM group in the example is only for illustration and is not limited in this application.

[0515] Optionally, a code division multiplexing group included in the second frequency domain unit of the DMRS in the second pattern may correspond to one or two antenna ports.

[0516] Optionally, the antenna ports of any two CDM groups in CDM group 3a, CDM group 3b, CDM group 3c, CDM group 3d, CDM group 3e, CDM group 3f, CDM group 3g, CDM group 3h, CDM group 3i, CDM group 3j, CDM group 3k and CDM group 3l are different.

[0517] For example, Figure 9 In the CDM group, 3a corresponds to antenna port 0 and / or port 1, 3b corresponds to antenna port 2 and / or port 3, 3c corresponds to antenna port 4 and / or port 5, 3d corresponds to antenna port 6 and / or port 7, 3e corresponds to antenna port 8 and / or port 9, 3f corresponds to antenna port 10 and / or port 11, 3g corresponds to antenna port 12 and / or port 13, 3h corresponds to antenna port 14 and / or port 15, 3i corresponds to antenna port 16 and / or port 17, 3g corresponds to antenna port 18 and / or port 19, 3k corresponds to antenna port 20 and / or port 21, and 3l corresponds to antenna port 22 and / or port 23. Figure 9 The antenna port number corresponding to the CDM group in the example is only for illustration and is not limited in this application.

[0518] Optionally, two CDM groups in CCDM group 3a, CDM group 3b, CDM group 3c, CDM group 3d, CDM group 3e, CDM group 3f, CDM group 3g, CDM group 3h, CDM group 3i, CDM group 3j, CDM group 3k, and CDM group 3l may have the same antenna port.

[0519] For example, CDM group 3a corresponds to antenna ports a3 and / or b3, CDM group 3b corresponds to antenna ports c3 and / or d3, CDM group 3c corresponds to antenna ports e3 and / or f3, CDM group 3d corresponds to antenna ports g3 and / or h3, CDM group 3e corresponds to antenna ports i3 and / or j3, CDM group 3f corresponds to antenna ports k3 and / or l3, CDM group 3g corresponds to antenna ports m3 and / or n3, CDM group 3h corresponds to antenna ports o3 and / or p3, CDM group 3i corresponds to antenna ports q3 and / or r3, CDM group 3j corresponds to antenna ports s3 and / or t3, CDM group 3k corresponds to antenna ports u3 and / or v3, or, CDM group 3l corresponds to antenna ports w3 and / or x3. Where a3, b3, c3, d3, e3, f3, g3, h3, i3, j3, k3, l3, m3, n3, o3, p3, q3, r3, s3, t3, u3, v3, w3, and x3 are integers greater than or equal to 0. Where a3, b3, c3, d3, e3, f3, g3, h3, i3, j3, k3, l3, m3, n3, o3, p3, q3, r3, s3, t3, u3, v3, w3, and x3 can be the same or different.

[0520] As an example, when the second type pattern is the third pattern, the code division multiplexing group included in the second frequency domain unit of the DMRS of the second type pattern can be implemented in various ways. For example, the implementation may include at least one or more of the following:

[0521] 1. The second frequency domain unit of the DMRS of the second type includes 6 CDM groups. For example, the resource pattern of the second frequency domain unit of the DMRS of the second type can be... Figure 9 ;

[0522] 2. The second frequency domain unit of the DMRS in the second type of pattern includes 5 CDM groups. Optionally, these 5 CDM groups can be... Figure 9 The combination of any 5 CDM groups shown can be, for example, a combination of CDM group 4a, CDM group 4b, CDM group 4c, CDM group 4d and CDM group 4e, or a combination of CDM group 4a, CDM group 4b, CDM group 4c, CDM group 4d and CDM group 4f, etc.

[0523] 3. The second frequency domain unit of the DMRS in the second type of pattern includes 4 CDM groups. Optionally, these 4 CDM groups can be... Figure 9The combination of any four CDM groups shown can be, for example, a combination of CDM group 4a, CDM group 4b, CDM group 4c and CDM group 4d, or a combination of CDM group 4a, CDM group 4b, CDM group 4c and CDM group 4f, etc.

[0524] 4. The second frequency domain unit of the DMRS in the second type of pattern includes three CDM groups. Optionally, these three CDM groups can be... Figure 9 The combination of any three CDM groups shown can be, for example, a combination of CDM group 4a, CDM group 4b and CDM group 4c, or a combination of CDM group 4a, CDM group 4b and CDM group 4f, etc.

[0525] 5. The second frequency domain unit of the DMRS in the second type of pattern includes two CDM groups. Optionally, these two CDM groups can be... Figure 10a Any combination of three CDM groups shown, for example, a combination of CDM group 4a and CDM group 4b, or a combination of CDM group 4b and CDM group 4f, etc.; or,

[0526] 6. The second frequency domain unit of the DMRS of the second type of pattern includes one CDM group. Optionally, this one CDM group can be... Figure 10a Any one of the CDM groups shown.

[0527] Optionally, the second code division multiplexing group mentioned above includes at least one or more of the following: CDM group 4a, CDM group 4b, CDM group 4c, CDM group 4d and CDM group 4e or CDM group 4f.

[0528] Optionally, different CDM groups correspond to different frequency domain positions. For example, CDM group 4a is offset by one subcarrier relative to CDM group 4b, CDM group 4c is offset by one subcarrier relative to CDM group 4b, and CDM group 4d is offset by one subcarrier relative to CDM group 4c, etc. Figure 10b The frequency domain location corresponding to the CDM group in the example is only for illustration and is not limited in this application.

[0529] Optionally, the code division multiplexing group included in the second frequency domain unit of the DMRS in the third pattern can correspond to 1, 2, 3 or 4 antenna ports.

[0530] Optionally, the antenna ports corresponding to any two of the following CDM groups are different: CDM group 4a, CDM group 4b, CDM group 4c, CDM group 4d, CDM group 4e, and CDM group 4f.

[0531] For example, Figure 10bCDM group 4a corresponds to antenna ports 0, 1, 2 and / or 3; CDM group 4b corresponds to antenna ports 4, 5, 6 and / or 7; CDM group 4c corresponds to antenna ports 8, 9, 10 and / or 11; CDM group 4d corresponds to antenna ports 12, 13, 14 and / or 15; CDM group 4e corresponds to antenna ports 16, 17, 18 and / or 19; and CDM group 4f corresponds to antenna ports 20, 21, 22 and / or 24. Figure 10b The antenna port number corresponding to the CDM group in the example is only for illustration and is not limited in this application.

[0532] Optionally, two CDM groups (CCDM group 4a, CDM group 4b, CDM group 4c, CDM group 4d, CDM group 3e, and CDM group 4f) may have the same antenna port.

[0533] For example, CDM group 4a corresponds to antenna ports a4, b4, c4 and / or d4; CDM group 4b corresponds to antenna ports e4, f4, g4 and / or h4; CDM group 4c corresponds to antenna ports i4, j4, k4 or l4; CDM group 4d corresponds to antenna ports m4, n4, o4 and / or p4; CDM group 4e corresponds to antenna ports q4, r4, s4 and / or t4; and CDM group 4f corresponds to antenna ports u4, v4, w4 and / or x4, where a4, b4, c4, d4, e4, f4, g4, h4, i4, j4, k4, l4, m4, n4, o4, p4, q4, r4, s4, t4, u4, v4, w4, and x4 are integers greater than or equal to 0. Among them, a4, b4, c4, d4, e4, f4, g4, h4, i4, j4, k4, l4, m4, n4, o4, p4, q4, r4, s4, t4, u4, v4, w4, and x4 can be the same or different.

[0534] As an example, the code division multiplexing blocks included in the third frequency domain unit of the third-type pattern DMRS can be implemented in several ways, for example, including at least one or more of the following:

[0535] 1. The third frequency domain unit of the DMRS with the third pattern includes 12 CDM groups. For example, the resource pattern of the third frequency domain unit of the DMRS with the third pattern can be... Figure 10a ;

[0536] 2. The third frequency domain unit of the DMRS of the third type pattern includes 11 CDM groups. Optionally, these 11 CDM groups can be... Figure 10a Any combination of 11 CDM groups shown, in order to Figure 10a Taking 10b-1 as an example, these 11 CDM groups can be combinations of CDM group 5a, CDM group 5b, CDM group 5c, CDM group 5d, CDM group 5e, CDM group 5f, CDM group 5g, CDM group 5h, CDM group 5i, CDM group 5j and CDM group 5k, with... Figure 10a Taking 10b-2 as an example, these 11 CDM groups can be combinations of CDM group 5a, CDM group 5b, CDM group 5c, CDM group 5d, CDM group 5e, CDM group 5f, CDM group 5g, CDM group 5h, CDM group 5i, CDM group 5j and CDM group 5l; Figure 10a Taking 10b-12 as an example, these 11 CDM groups can be combinations of CDM group 5b, CDM group 5c, CDM group 5d, CDM group 5e, CDM group 5f, CDM group 5g, CDM group 5h, CDM group 5i, CDM group 5j, CDM group 5k and CDM group 5l;

[0537] 3. The third frequency domain unit of the DMRS of the third type pattern includes 10, 9, 8... or 3 CDM groups. Optionally, these 10 CDM groups can be... Figure 10a A combination of any 10 CDM groups shown; optionally, these 9 CDM groups can be... Figure 10a The combination of any 9 CDM groups shown; optionally, these 8 CDM groups can be... Figure 10a The combination of any 8 CDM groups shown; optionally, these 7 CDM groups can be... Figure 10a The combination of any 7 CDM groups shown; optionally, these 6 CDM groups can be... Figure 10c The combination of any 6 CDM groups shown; optionally, these 5 CDM groups can be... Figure 10c The combination of any 5 CDM groups shown; optionally, these 4 CDM groups can be... Figure 10c The combination of any four CDM groups shown; optionally, these three CDM groups can be... Figure 10a Any combination of any three CDM groups shown;

[0538] 4. The third frequency domain unit of the DMRS of the third type pattern includes two CDM groups. Optionally, these two CDM groups can be... Figure 10d The combination of any two CDM groups shown. Figure 10d Taking 10c-1 as an example, these two CDM groups can be a combination of CDM group 5a and CDM group 5b. Figure 10d Taking 10c-2 as an example, these two CDM groups can be a combination of CDM group 5a and CDM group 5c; Figures 10a-10d Taking 10c-n as an example, these two CDM groups can be a combination of CDM group 5k and CDM group 5l; or,

[0539] 5. The third frequency domain unit of the DMRS of the third type pattern includes one CDM group. Optionally, this one CDM group can be... Figures 10a-10d The combination of any one of the CDM groups shown. Figures 10a-10d Taking 10d-1 as an example, this CDM group can be CDM group 5a, with Figures 10a-10d Taking 10d-2 as an example, this one CDM group can be CDM group 5b; Figures 6a-6d Taking 10d-12 as an example, this CDM group can be CDM group 5l.

[0540] Optionally, the aforementioned third code division multiplexing group includes at least one or more of the following: CDM group 5a, CDM group 5b, CDM group 5c, CDM group 5d, CDM group 5e, CDM group 5f, CDM group 5g, CDM group 5h, CDM group 5i, CDM group 5j, CDM group 5k or CDM group 5l.

[0541] Optionally, different CDM groups correspond to different frequency domain positions.

[0542] For example, CDM group 5b as a whole is offset by 1 subcarrier relative to CDM group 5a as a whole, CDM group 5c as a whole is offset by 1 subcarrier relative to CDM group 5b as a whole, and CDM group 5d as a whole is offset by 1 subcarrier relative to CDM group 5c as a whole, etc.

[0543] For example, Figures 7a-7eIn the CDM group 5a, subcarrier 0 of the third frequency domain resource unit is occupied; CDM group 5b, subcarrier 1 of the third frequency domain resource unit is occupied; CDM group 5c, subcarrier 2 of the third frequency domain resource unit is occupied; CDM group 5d, subcarrier 3 of the third frequency domain resource unit is occupied; CDM group 5e, subcarrier 4 of the third frequency domain resource unit is occupied; CDM group 5f, subcarrier 5 of the third frequency domain resource unit is occupied; CDM group 5g, subcarrier 6 of the third frequency domain resource unit is occupied; CDM group 5h, subcarrier 7 of the third frequency domain resource unit is occupied; CDM group 5i, subcarrier 8 of the third frequency domain resource unit is occupied; CDM group 5j, subcarrier 9 of the third frequency domain resource unit is occupied; CDM group 5k, subcarrier 10 of the third frequency domain resource unit is occupied; or CDM group 5l, subcarrier 11 of the third frequency domain resource unit is occupied. Figure 8 The frequency domain location corresponding to the CDM group in the example is only for illustration and is not limited in this application.

[0544] Optionally, a code division multiplexing group included in the third frequency domain unit of the third type pattern of DMRS can correspond to an antenna port.

[0545] Optionally, any two CDM groups in CDM group 5a, CDM group 5b, CDM group 5c, CDM group 5d, CDM group 5e, CDM group 5f, CDM group 5g, CDM group 5h, CDM group 5i, CDM group 5j, CDM group 5k and CDM group 5l may have different antenna ports.

[0546] For example, Figure 9 In the CDM group, 5a corresponds to antenna port 0, 5b corresponds to antenna port 1, 5c corresponds to antenna port 2, 5d corresponds to antenna port 3, 5e corresponds to antenna port 4, 5f corresponds to antenna port 5, 5g corresponds to antenna port 6, 5h corresponds to antenna port 7, 5i corresponds to antenna port 8, 5j corresponds to antenna port 9, 5k corresponds to antenna port 10, or 5l corresponds to antenna port 11. Figures 10a-10d The antenna port number corresponding to the CDM group in the example is only for illustration and is not limited in this application.

[0547] Optionally, among CDM groups 5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h, 5i, 5j, 5k, and 5l, two CDM groups may have the same antenna port.

[0548] For example, CDM group 5a corresponds to antenna port a5, CDM group 5b corresponds to antenna port b5, CDM group 5c corresponds to antenna port c5, CDM group 5d corresponds to antenna port d5, CDM group 5e corresponds to antenna port e5, CDM group 5f corresponds to antenna port f5, CDM group 5g corresponds to antenna port g5, CDM group 5h corresponds to antenna port h5, CDM group 5i corresponds to antenna port i5, CDM group 5j corresponds to antenna port j5, CDM group 5k corresponds to antenna port k5, or CDM group 5l corresponds to antenna port l5. Where a5, b5, c5, d5, e5, f5, g5, h5, i5, j5, k5, and l5 are integers greater than or equal to 0. Where a5, b5, c5, d5, e5, f5, g5, h5, i5, j5, k5, or l5 can be the same or different.

[0549] Optionally, the first and / or second devices may determine the frequency domain location of the DMRS based on the type of the first resource pattern.

[0550] Optionally, the first device and / or the second device may determine the frequency domain location occupied by the code division multiplexing group of the DMRS based on the type of the first resource pattern.

[0551] Optionally, the frequency domain location may differ for different cases (i.e., different types of first resource patterns), and can be implemented in the following ways:

[0552] In one possible implementation, the first code division multiplexing group of the DMRS of the first type pattern occupies subcarriers k1, k1+4, and k1+8 in the first frequency domain unit, wherein k1 ≥ 0 and k1 is an integer; and / or, the second code division multiplexing group of the DMRS of the second type pattern occupies subcarriers k2 and k2+1 in the second frequency domain unit, wherein k2 = 2N, wherein N ≥ 0 and N is an integer; and / or, the third code division multiplexing group of the DMRS of the third type pattern occupies subcarrier k3 in the third frequency domain unit, wherein k3 ≥ 0 and k3 is an integer.

[0553] Based on the above implementation, the subcarrier spacing corresponding to different patterns is different, that is, the corresponding frequency domain positions are different. On the one hand, this application provides diverse frequency domain position design schemes, thereby improving the flexibility of frequency domain positions. On the other hand, the spacing between subcarriers in the above implementation is the same as the spacing between subcarriers of the NZP-CSI-RS resources defined by the protocol. Therefore, rate matching of DMRS can be achieved without changing the protocol, thereby improving communication performance.

[0554] Optionally, the above implementation can be replaced by: the first code division multiplexing group of the DMRS of the first type pattern includes: a first subcarrier, a second subcarrier and a third subcarrier, wherein the first subcarrier and the second subcarrier are spaced by 4 subcarriers, and the second subcarrier and the third subcarrier are spaced by 4 subcarriers; the first code division multiplexing group of the DMRS of the third type pattern includes: a first subcarrier and a second subcarrier, wherein the first subcarrier and the second subcarrier are spaced by 1 subcarrier.

[0555] Optionally, k1 includes at least one of the following: 0, 1, or 2; k2 includes at least one of the following: 0, 1, 2, 3, 4, or 5; k3 includes at least one of the following: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12.

[0556] Optionally, the value of k1 corresponds to the subcarrier index of the DMRS of the first type of pattern, the value of k2 corresponds to the subcarrier index of the DMRS of the second type of pattern, and / or, the value of k3 corresponds to the subcarrier index of the DMRS of the third type of pattern. For example, this correspondence can be shown in at least one row of Table 5:

[0557] Table 5

[0558]

[0559] In Table 1, DMRS occupies subcarrier k, k=0 means DMRS occupies subcarrier 0, k=1 means DMRS occupies subcarrier 1, and so on, k=11 means DMRS occupies subcarrier 11.

[0560] In addition to the above-mentioned correspondences, other correspondences also exist in this application:

[0561] In one alternative implementation, there is an association between at least two of the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, and the frequency domain location of the first DMRS.

[0562] Optionally, the first device and / or the second device may determine the association between at least two of the following: the antenna port occupied by the DMRS, the code division multiplexing group number of the DMRS, and the frequency domain location of the DMRS, based on the type of the first resource pattern.

[0563] Based on the above implementation method, since there is a correlation between the above at least two, the other can be determined based on one of them. For example, the code division multiplexing group number of the first DMRS can be determined by the antenna port occupied by the first DMRS. This can help the first device quickly determine the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, and the frequency domain position of the first DMRS, etc.

[0564] Optionally, the first device and / or the second device may determine the correspondence between the antenna ports of the DMRS and the code division multiplexing group number based on the type of the first resource pattern.

[0565] Optionally, the correspondence between antenna ports and code division multiplexing group numbers may differ in different cases. Please refer to the following example for details:

[0566] For example, please see Figures 6a-6d The correspondence between the DMRS pattern of the first type and the CDM group and the antenna port in the first frequency domain element includes at least one or more of the following:

[0567] 1. CDM group 1a corresponds to port 0;

[0568] 2. CDM group 1b corresponds to port 1;

[0569] 3. CDM group 1c corresponds to port 2; or,

[0570] 4. CDM group 1d corresponds to port 3.

[0571] For example, please refer to Figures 7a-7e When the second type of pattern is the first type of pattern, the correspondence between the DMRS of the second type of pattern and the CDM group and the antenna port in the second frequency domain element includes at least one or more of the following:

[0572] 1. CDM group 2a corresponds to port0 and port1;

[0573] 2. CDM group 2b corresponds to port2 and port3;

[0574] 3. CDM group 2c corresponds to port4 and port5;

[0575] 4. CDM group 2d corresponds to port 6 and port 7;

[0576] 5. CDM group 2e corresponds to port 8 and port 9; or,

[0577] 6. CDM group 2f corresponds to port10 and port11.

[0578] For example, please refer to Figure 8 When the second type of pattern is the second pattern, the correspondence between the DMRS of the second type of pattern and the CDM group and the antenna port in the second frequency domain element includes at least one or more of the following:

[0579] 1. CDM group 3a corresponds to port0 and port1;

[0580] 2. CDM group 3b corresponds to port2 and port3;

[0581] 3. CDM group 3c corresponds to port4 and port5;

[0582] 4. CDM group 3D corresponds to port 6 and port 7;

[0583] 5. CDM group 3e corresponds to port 8, port 9;

[0584] 6. CDM group 3f corresponds to port 10 and port 11;

[0585] 7. CDM group 3g corresponds to port 12 and port 13;

[0586] 8. CDM group 3h corresponds to port14 and port15;

[0587] 9. CDM group 3i corresponds to port 16 and port 17;

[0588] 10. CDM group 3j corresponds to port 18 and port 19;

[0589] 11. CDM group 3k corresponds to port 20, port 21; or,

[0590] 12. CDM group 3l corresponds to port 22 and port 23.

[0591] For example, please refer to Figure 9 When the second type of pattern is the third type of pattern, the correspondence between the DMRS of the second type of pattern and the CDM group and the antenna port in the second frequency domain element includes at least one or more of the following:

[0592] 1. CDM group 4a corresponds to port0, port1, port2, and port3;

[0593] 2. CDM group 4b corresponds to port 4, port 5, port 6, and port 7;

[0594] 3. CDM group 4c corresponds to ports 8, 9, 10, and 11;

[0595] 4. CDM group 4d corresponds to ports 12, 13, 14, and 15;

[0596] 5. CDM group 4e corresponds to ports 16, 17, 18, and 19; or,

[0597] 6. CDM group 4f corresponds to port 20, port 21, port 22, and port 23.

[0598] For example, please refer to Figures 10a-10d The correspondence between the CDM group and the antenna port on the third frequency domain unit of the DMRS of the third type pattern includes at least one or more of the following:

[0599] 1. CDM group 5a corresponds to port 0;

[0600] 2. CDM group 5b corresponds to port1;

[0601] 3. CDM group 5c corresponds to port 2;

[0602] 4. CDM group 5d corresponds to port 3;

[0603] 5. CDM group 5e corresponds to port 4;

[0604] 6. CDM group 5f corresponds to port 5;

[0605] 7. CDM group 5g corresponds to port 6;

[0606] 8. CDM group 5h corresponds to port 7;

[0607] 9. CDM group 5i corresponds to port 8;

[0608] 10. CDM group 5j corresponds to port 9;

[0609] 11. CDM group 5k corresponds to port 10; or,

[0610] 12. CDM group 5l corresponds to port 11.

[0611] Optionally, the first device and / or the second device may determine the correspondence between the antenna port of the DMRS and the frequency domain location of the DMRS based on the type of the first resource pattern.

[0612] Optionally, the correspondence between the antenna port and the frequency domain location of the first DMRS may differ in different cases. See the following example for details:

[0613] For example, please see Figures 6a-6d The correspondence between the antenna ports and frequency domain locations of the first type of DMRS pattern includes at least one or more of the following:

[0614] 1. port0 corresponds to subcarrier 0, subcarrier 4, and subcarrier 8 on the first frequency domain unit;

[0615] 2. port1 corresponds to subcarrier 1, subcarrier 5, and subcarrier 9 on the first frequency domain unit;

[0616] 3. port2 corresponds to subcarriers 2, 6, and 10 in the first frequency domain unit; or,

[0617] 4. port3 corresponds to subcarrier 3, subcarrier 7, and subcarrier 11 on the first frequency domain unit.

[0618] For example, please refer to Figures 7a-7e When the second type of pattern is the first type of pattern, the correspondence between the antenna port and the frequency domain position of the DMRS of the second type of pattern includes at least one or more of the following:

[0619] 1. port0 and port1 correspond to subcarrier 0 and subcarrier 1 in the second frequency domain unit;

[0620] 2. Port2 and Port3 correspond to subcarrier 2 and subcarrier 3 on the second frequency domain unit;

[0621] 3. Port 4 and Port 5 correspond to subcarrier 4 and subcarrier 5 on the second frequency domain unit;

[0622] 4. Port 6 and Port 7 correspond to subcarrier 6 and subcarrier 7 on the second frequency domain unit;

[0623] 5. Port 8 and Port 9 correspond to subcarrier 8 and subcarrier 9 on the second frequency domain unit; or,

[0624] 6. Port 10 and Port 11 correspond to subcarrier 10 and subcarrier 11 on the second frequency domain unit.

[0625] For example, please refer to Figure 8 When the second type of pattern is a second pattern, the correspondence between the antenna port and the frequency domain position of the DMRS of the second type of pattern includes at least one or more of the following:

[0626] 1. port0 and port1 correspond to subcarrier 0 and subcarrier 1 in the first symbol and second frequency domain unit, respectively;

[0627] 2. Port2 and Port3 correspond to subcarrier 2 and subcarrier 3 on the first symbol and second frequency domain unit, respectively;

[0628] 3. Port 4 and Port 5 correspond to subcarrier 4 and subcarrier 5 on the first symbol and the second frequency domain unit, respectively;

[0629] 4. Port 6 and Port 7 correspond to subcarrier 6 and subcarrier 7 on the first symbol and the second frequency domain unit, respectively;

[0630] 5. Port 8 and Port 9 correspond to subcarrier 8 and subcarrier 9 on the first symbol and second frequency domain unit, respectively;

[0631] 6. Port 10 and Port 11 correspond to subcarrier 10 and subcarrier 11 on the first symbol and the second frequency domain unit, respectively;

[0632] 7. Port 12 and Port 13 correspond to the second symbol, subcarrier 0 and subcarrier 1 on the second frequency domain unit;

[0633] 8. Port 14 and Port 15 correspond to the second symbol, subcarrier 2 and subcarrier 3 on the second frequency domain unit;

[0634] 9. Port 16 and Port 17 correspond to the second symbol, subcarrier 4 and subcarrier 5 on the second frequency domain unit;

[0635] 10. Port 18 and Port 19 correspond to the second symbol, subcarrier 6 and subcarrier 7 on the second frequency domain unit;

[0636] 11. Port 20 and Port 21 correspond to the second symbol, subcarrier 8 and subcarrier 9 on the second frequency domain unit; or,

[0637] 12. Port 22 and Port 23 correspond to the second symbol, subcarrier 10 and subcarrier 11 on the second frequency domain unit.

[0638] For example, please refer to Figure 9 When the second type of pattern is the third type of pattern, the correspondence between the antenna port and the frequency domain position of the DMRS of the second type of pattern includes at least one or more of the following:

[0639] 1. Port0, port1, port2, and port3 correspond to subcarrier 0 and subcarrier 1 in the second frequency domain unit;

[0640] 2. Ports 4, 5, 6, and 7 correspond to subcarrier 2 and subcarrier 3 on the second frequency domain unit;

[0641] 3. Ports 8, 9, 10, and 11 correspond to subcarriers 4 and 5 in the second frequency domain unit;

[0642] 4. Ports 12, 13, 14, and 15 correspond to subcarriers 6 and 7 in the second frequency domain unit;

[0643] 5. Ports 16, 17, 18, and 19 correspond to subcarriers 8 and 9 in the second frequency domain unit; or,

[0644] 6. Ports 20, 21, 22, and 23 correspond to subcarriers 10 and 11 on the second frequency domain unit.

[0645] For example, please refer to Figures 10a-10dThe correspondence between the antenna ports and frequency domain locations of the DMRS in the third type of pattern includes at least one or more of the following:

[0646] 1. port0 corresponds to subcarrier 0 on the third frequency domain unit;

[0647] 2. port1 corresponds to subcarrier 1 on the third frequency domain unit;

[0648] 3. port2 corresponds to subcarrier 2 on the third frequency domain unit;

[0649] 4. port3 corresponds to subcarrier 3 on the third frequency domain unit;

[0650] 5. port4 corresponds to subcarrier 4 on the third frequency domain unit;

[0651] 6. port5 corresponds to subcarrier 5 on the third frequency domain unit;

[0652] 7. port6 ​​corresponds to subcarrier 6 on the third frequency domain unit;

[0653] 8. port7 corresponds to subcarrier 7 on the third frequency domain unit;

[0654] 9. port8 corresponds to subcarrier 8 on the third frequency domain unit;

[0655] 10.port9 corresponds to subcarrier 9 on the third frequency domain unit;

[0656] 11.port10 corresponds to subcarrier 10 on the third frequency domain unit; or,

[0657] 12.port11 corresponds to subcarrier 11 on the third frequency domain unit.

[0658] Optionally, the first device and / or the second device may determine the correspondence between the code division multiplexing group number of the DMRS and the frequency domain position of the DMRS based on the type of the first resource pattern.

[0659] Optionally, the correspondence between the code division multiplexing group number and the frequency domain position of the first DMRS may differ in different cases. See the following example for details:

[0660] For example, please see CDM group number The correspondence between the DMRS pattern of the first type and the CDM group and the antenna port in the first frequency domain element includes at least one or more of the following:

[0661] 1. CDM group 1a corresponds to subcarriers 0, 4, and 8 on the first frequency domain unit.

[0662] 2. CDM group 1b corresponds to subcarrier 1, subcarrier 5, and subcarrier 9 on the first frequency domain unit;

[0663] 3. CDM group 1c corresponds to subcarriers 2, 6, and 10 on the first frequency domain unit; or,

[0664] 4. CDM group 1d corresponds to subcarriers 3, 7, and 11 on the first frequency domain unit.

[0665] For example, please refer to Δ When the second type of pattern is the first type of pattern, the correspondence between the CDM group and the antenna port on the second frequency domain unit of the DMRS of the second type of pattern includes at least one or more of the following:

[0666] 1. CDM group 2a corresponds to subcarrier 0 and subcarrier 1 on the second frequency domain unit;

[0667] 2. CDM group 2b corresponds to subcarrier 2 and subcarrier 3 on the second frequency domain unit;

[0668] 3. CDM group 2c corresponds to subcarrier 4 and subcarrier 5 on the second frequency domain unit;

[0669] 4. CDM group 2d corresponds to subcarrier 6 and subcarrier 7 on the second frequency domain unit;

[0670] 5. CDM group 2e corresponds to subcarrier 8 and subcarrier 9 on the second frequency domain unit; or,

[0671] 6. CDM group 2f corresponds to subcarrier 10 and subcarrier 11 on the second frequency domain unit.

[0672] For example, please refer to CDM group number When the second type of pattern is the second pattern, the correspondence between the CDM group on the second frequency domain unit of the DMRS of the second type of pattern and the antenna port includes at least one or more of the following:

[0673] 1. CDM group 3a corresponds to the first symbol, subcarrier 0 and subcarrier 1 on the second frequency domain unit;

[0674] 2. CDM group 3b corresponds to the first symbol, subcarrier 2 and subcarrier 3 on the second frequency domain unit;

[0675] 3. CDM group 3c corresponds to the first symbol, subcarrier 4 and subcarrier 5 on the second frequency domain unit;

[0676] 4. CDM group 3d corresponds to the first symbol, subcarrier 6 and subcarrier 7 on the second frequency domain unit;

[0677] 5. CDM group 3e corresponds to the first symbol, subcarrier 8 and subcarrier 9 on the second frequency domain unit;

[0678] 6. CDM group 3f corresponds to the first symbol, subcarrier 10 and subcarrier 11 on the second frequency domain unit;

[0679] 7. CDM group 3g corresponds to the second symbol, subcarrier 0 and subcarrier 1 on the second frequency domain unit;

[0680] 8. CDM group 3h corresponds to the second symbol, subcarrier 2 and subcarrier 3 on the second frequency domain unit;

[0681] 9. CDM group 3i corresponds to the second symbol, subcarrier 4 and subcarrier 5 on the second frequency domain unit;

[0682] 10. CDM group 3j corresponds to the second symbol, subcarrier 6 and subcarrier 7 on the second frequency domain unit; or,

[0683] 11. CDM group 3k corresponds to the second symbol, subcarrier 10 and subcarrier 11 on the second frequency domain unit.

[0684] For example, please refer to Δ When the second type of pattern is the third type of pattern, for example, there are two REs in the frequency domain performing orthogonal mask code division multiplexing, and two REs in the time domain performing orthogonal mask code division multiplexing, the correspondence between the CDM group and the antenna port in the second frequency domain unit of the DMRS of the second type of pattern includes at least one or more of the following:

[0685] 1. CDM group 4a corresponds to subcarrier 0 and subcarrier 1 in the second frequency domain unit;

[0686] 2. CDM group 4b corresponds to subcarrier 2 and subcarrier 3 on the second frequency domain unit;

[0687] 3. CDM group 4c corresponds to subcarrier 4 and subcarrier 5 in the second frequency domain unit;

[0688] 4. CDM group 4d corresponds to subcarrier 6 and subcarrier 7 on the second frequency domain unit;

[0689] 5. CDM group 4e corresponds to subcarrier 8 and subcarrier 9 in the second frequency domain unit; or,

[0690] 6. CDM group 4f corresponds to subcarrier 10 and subcarrier 11 on the second frequency domain unit.

[0691] For example, please refer to CDM group number The correspondence between the CDM group and the antenna port on the third frequency domain unit of the DMRS of the third type pattern includes at least one or more of the following:

[0692] 1. CDM group 5a corresponds to subcarrier 0 on the third frequency domain unit;

[0693] 2. CDM group 5b corresponds to subcarrier 1 on the third frequency domain unit;

[0694] 3. CDM group 5c corresponds to subcarrier 2 on the third frequency domain unit;

[0695] 4. CDM group 5d corresponds to subcarrier 3 on the third frequency domain unit.

[0696] 5. CDM group 5e corresponds to subcarrier 4 on the third frequency domain unit;

[0697] 6. CDM group 5f corresponds to subcarrier 5 on the third frequency domain unit;

[0698] 7. CDM group 5g corresponds to subcarrier 6 on the third frequency domain unit;

[0699] 8. CDM group 5h corresponds to subcarrier 7 on the third frequency domain unit;

[0700] 9. CDM group 5i corresponds to subcarrier 8 on the third frequency domain unit;

[0701] 10. CDM group 5j corresponds to subcarrier 9 on the third frequency domain unit;

[0702] 11. CDM group 5k corresponds to subcarrier 10 on the third frequency domain unit; or,

[0703] 12. CDM group 5l corresponds to subcarrier 11 on the third frequency domain unit.

[0704] Optionally, the first device needs to determine the type of the first resource pattern, that is, whether the first resource pattern is a first type pattern, a second type pattern, or a third type pattern. The first device can determine the type of the first resource pattern in the following ways:

[0705] In one possible implementation, the second device sends first information to the first device, the first information indicating that the first resource pattern is the first type of pattern, the second type of pattern, or the third type of pattern, and accordingly, the first device receives the first information.

[0706] In the above implementation, the first device can determine the type of the first resource pattern based on the first information, and then determine information such as the code division multiplexing group of the first resource pattern based on the type of the first resource pattern, so as to realize the flexible determination of the type of the first resource pattern, meet different communication needs, and improve communication performance.

[0707] Optionally, the first information can be an identifier of a first type of pattern, an identifier of a second type of pattern, or an identifier of a third type of pattern. For example, the first information can be an index of a first type of pattern, an index of a second type of pattern, or an index of a third type of pattern. Alternatively, two bits in the first information can be used to indicate that the first resource pattern is the first type of pattern, the second type of pattern, or the third type of pattern. For example, when these two bits are 00, the first resource pattern is indicated to be the first type of pattern; when these two bits are 01, the first resource pattern is indicated to be the second type of pattern; and when these two bits are 10, the first resource pattern is indicated to be the third type of pattern.

[0708] Optionally, the second device may send the first information via higher-layer signaling, such as RRC signaling or MAC CE signaling; or, the second device may send the first information via physical layer signaling, such as DCI signaling.

[0709] Optionally, the aforementioned third information may include the first information, or the third information may be sent simultaneously with the first information, or the third information may be sent first and then the first information may be sent, or the first information may be sent first and then the third information may be sent.

[0710] In one possible implementation, the second device sends second information indicating at least one of the following: the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, the code division multiplexing group number of the first DMRS, or the frequency domain location of the first DMRS. Accordingly, the first device receives the second information.

[0711] Based on the above implementation, the first device can determine the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, the number of code division multiplexing groups of the first DMRS, or the frequency domain location of the first DMRS through the second information. This allows for flexible signaling indication of the antenna port occupied by the first DMRS, the code division multiplexing group number of the first DMRS, the number of code division multiplexing groups of the first DMRS, or the frequency domain location of the first DMRS, thereby meeting different communication needs and improving communication performance.

[0712] Optionally, the above "antenna port occupied by the first DMRS" can also be replaced with: the identifier of the antenna port occupied by the first DMRS, such as the serial number of the antenna port occupied by the first DMRS. The above "code division multiplexing group number of the first DMRS" can also be replaced with: relevant information of the code division multiplexing group of the first DMRS, such as the range of the code division multiplexing group.

[0713] Optionally, the second device may send the second information via higher-layer signaling, such as RRC signaling or MAC CE signaling; or, the second device may send the second information via physical layer signaling, such as DCI signaling.

[0714] Optionally, the third information may include the second information, or the third information may be sent simultaneously with the second information, or the third information may be sent first and then the second information may be sent, or the second information may be sent first and then the third information may be sent.

[0715] As an example, the second information may include third indication information, which is an identifier of the antenna port occupied by the first DMRS. For example, the second information may include the sequence number of the antenna port occupied by the first DMRS. For instance, one bit of the second information may be used to carry the identifier of the antenna port occupied by the first DMRS. This bit could be 0, where 0 represents the first DMRS occupying the 0th antenna port (port 0), or it could be 1, where 1 represents the first DMRS occupying port 1. As another example, the second information may include a range of the sequence numbers of the antenna ports occupied by the first DMRS. For instance, the range of antenna ports could be port 3 to port 5, meaning the first DMRS occupies ports 3, 4, and 5.

[0716] As an example, the second information may include fourth indication information, which is the code division multiplexing group number of the first DMRS. For instance, two bits of the second information may be used to carry the code division multiplexing group number of the first DMRS. These two bits could be 01, where 01 represents that the code division multiplexing group number of the first DMRS in the first frequency domain unit is 1; or they could be 11, where 11 represents that the code division multiplexing group number of the first DMRS in the first frequency domain unit is 2. Furthermore, the second information may include the range of code division multiplexing group numbers occupied by the first DMRS. For example, the range of code division multiplexing group numbers could be CDM group 1 to CDM group 4, meaning that the code division multiplexing group numbers of the first DMRS in the first frequency domain unit are CDM group 1, CDM group 2, CDM group 3, and CDM group 4.

[0717] As an example, the second information may include fifth indication information used to indicate the frequency domain position of the first DMRS. For instance, the second information may be the index of the subcarriers of the first DMRS, where there are 12 subcarriers in each symbol of one or more symbols, and these subcarriers are indexed as subcarriers 0, 1, 2...11. For example, the second information may be used to identify subcarriers 0, 4, 8, or as the index of subcarriers 0, 4, 8. In this case, the second information indicates that the first DMRS occupies the 0th, 4th, and 8th subcarriers in the first frequency domain unit.

[0718] For example, the fifth indication information may indicate at least one of the starting frequency domain cell location and / or the number of frequency domain cells of the first resource. For instance, the fifth indication information may be a DCI, which is sent by the second device to the first device, indicating the starting RB and the number of RBs.

[0719] For example, the starting frequency domain unit is located in the frequency domain resources of the first data channel, and the ending frequency domain unit is located in the frequency domain resources of the first data channel, where the first data channel is the channel where the first DMRS is located.

[0720] For example, the fifth indication information may indicate the RBG index to which the first resource belongs. For instance, the fifth indication information may be a DCI, which the second device may send to the first device, containing a bitmap indicating the RBG. Here, an RBG includes one or more RBs.

[0721] For example, the fifth indication information can indicate the location of the rate-matched frequency domain resource within the frequency domain resources of the first data channel. For instance, if the frequency domain resources of the first data channel include y1 RBGs, then the rate-matched frequency domain resource can indicate the index of at least one of the y1 RBGs.

[0722] Optionally, the RBG index can be an RBG index within the carrier or in the BWP, or it can be an RBG index in the frequency domain resources of the first data channel.

[0723] For example, when the RBG index is the RBG index of the frequency domain resources of the first data channel, if the frequency domain resources of the first data channel include y1 RBGs, then the RBG index for the indicated rate matching can be from 0 to y1-1. For example, RBG index 0 represents the first RBG of the first data channel, RBG index 1 represents the second RBG of the first data channel, and so on, with RBG index y1-1 representing the y1th RBG of the first data channel.

[0724] For example, the fifth indication information may indicate a third index corresponding to the starting frequency domain cell position of the first resource, which is used to indicate one of the one or more starting frequency domain cell positions. For example, the second device configures candidate starting RB positions via RRC signaling and indicates one of the starting RB positions in the DCI (i.e., the fifth indication information can be a DCI). For example, the second device configures candidate starting RB positions via RRC signaling, such as four positions. The starting RB position is indicated in the second DCI, that is, one of the four positions configured by the RRC signaling is indicated, such as a 2-bit indication.

[0725] Optionally, the RB length is predefined by the protocol or configured by the RRC signaling.

[0726] For example, the fifth indication information may indicate a fourth index corresponding to the number of frequency domain units of the first resource, which is used to indicate one of the frequency domain unit numbers among one or more frequency domain unit numbers. For example, the second device configures the number of candidate RBs to be four types via RRC signaling, such as 4 RBs, 8 RBs, 16 RBs, and 32 RBs; and the second device sends a DCI (i.e., the fifth indication information can be a DCI) to the first device, in which the number of RBs is indicated, for example, one of the four types configured by RRC signaling, such as a 2-bit indication.

[0727] Optionally, the starting RB is predefined by the protocol, for example, the starting RB is the starting RB of the first data channel.

[0728] As an example, the second information mentioned above may include sixth indication information for configuring the temporal location of the first resource. This sixth indication information may be implemented in at least one of the following ways.

[0729] For example, the sixth indication information may indicate a first bitmap used to determine the symbol position of the first resource. For instance, the second device sends a DCI (i.e., the sixth indication information may be a DCI) to the first device, and the DCI includes an indication of the symbol position.

[0730] Optionally, symbol positions can be indicated within a time slot. For example, if a time slot includes x1 symbols, then the first bitmap can indicate symbol positions using x1 bits. Here, x1 is a positive integer. For instance, if a time slot includes 14 symbols, then the bitmap is 14 bits. Alternatively...

[0731] Optionally, the symbol position can be indicated on the time-domain resources of the first data channel. For example, if the time-domain resources of the first data channel include x2 symbols, then the first bitmap can indicate the symbol position using x2 bits. Here, x2 is a positive integer. For instance, if the first data channel occupies 6 symbols, then the first bitmap can be 6 bits.

[0732] For example, the sixth indication information may indicate at least one of the following: the starting time unit position, the number of time units, and the time-domain density of the first resource. For instance, the second device sends a DCI to the first device, the DCI including an indication of the starting symbol position and / or symbol length. For example, the second device indicates the starting symbol position and / or symbol length in a second DCI.

[0733] Optionally, the start symbol position indicator is indicated within a time slot. For example, if a time slot includes x3 symbols, then it can be indicated by... Each bit indicates the start symbol position. Here, x3 is a positive integer. For example, if one time slot contains 14 symbols, then indicating the start symbol position requires 4 bits. in, This indicates rounding up from log214.

[0734] Optionally, the starting symbol position can be indicated on the time-domain resources of the first data channel. For example, if the time-domain resources of the first data channel include x4 symbols, then it can be indicated by... Each bit indicates the start symbol position. Where x4 is a positive integer. This indicates rounding up from log2 x 4. For example, if the first data channel occupies only 6 symbols, then 3 bits are needed to indicate the start symbol position. in, (This means rounding up log26)

[0735] Optionally, the symbol length can be 1, or 2, etc.

[0736] Optionally, the starting symbol position can be predefined, such as the starting symbol of a time slot, or the starting symbol of the first data channel.

[0737] Optionally, the symbol length is predefined by the protocol or configured by the RRC signaling. For example, 1 or 2, etc.

[0738] For example, the sixth indication information can indicate the second bitmap. For instance, the second device configures the candidate symbol position via RRC signaling and indicates the second bitmap corresponding to the symbol position via DCI (i.e., the sixth indication information is DCI).

[0739] For example, the second device indicates candidate symbol positions, such as four positions, to the first device via RRC signaling. The DCI can indicate a symbol position bitmap, such as 4 bits. For instance, the number of bits in the second bitmap can be equal to the number of candidate symbol positions.

[0740] For example, the second device sends a DCI to the first device, and the DCI contains a bitmap indicating the symbol position. For instance, the second device indicates the symbol position bitmap in a second DCI. For example, the number of bits in the second bitmap can be equal to log2 (the number of candidate start symbol positions) rounded up.

[0741] For example, the sixth indication information may indicate a second index corresponding to the start time unit position of the first resource, which is used to indicate one of one or more start time unit positions. For instance, the second device configures candidate start symbol positions via RRC signaling and indicates one of the start symbol positions via DCI (i.e., the sixth indication information is DCI).

[0742] For example, the second device indicates the candidate start symbol position to the first device via RRC signaling, such as four positions. The start symbol position can be indicated in DCI, that is, one position can be indicated from the four positions configured in the RRC signaling, for example, by indicating it with 2 bits of information.

[0743] For example, the second device sends a DCI to the first device, and the DCI indicates the position of the start symbol. For instance, the second device indicates the position of the start symbol in the second DCI.

[0744] Optionally, the symbol length is predefined by the protocol or configured by the RRC signaling. For example, 1 or 2, etc.

[0745] Optionally, the first or second device may determine a table of indication information for the DMRS antenna port based on the number of layers of data transmission.

[0746] For example, different tables of indication information for DMRS antenna ports can be designed based on different data transmission layers.

[0747] For example, when the number of data transmission layers is equal to 1, the table of indication information for the DMRS antenna port is Table 6.

[0748] For example, when the number of data transmission layers is greater than 1, the table of indication information for the DMRS antenna port is shown in Table 7.

[0749] Optionally, the first and second information can be encoded independently and / or indicated independently (indicated separately).

[0750] For example, the second device can carry first information and second information in 6 bits, of which 2 bits are used to carry the first information and 4 bits are used to carry the second information.

[0751] Optionally, the first and second information can be jointly encoded and / or jointly indicated.

[0752] For example, the second device can use 4 bits to jointly indicate the first information and the second information.

[0753] For example, the joint instruction can be at least one row in Table 6:

[0754] Table 6

[0755]

[0756] Optionally, the first device and / or the second device may determine a table of second information based on the first resource pattern.

[0757] For example, the indication of the second information can be seen in at least one row of Table 7:

[0758] Table 7

[0759]

[0760]

[0761] Optionally, the first device and / or the second device may determine the design of the DMRS based on the first resource pattern, wherein the design of the DMRS may include at least one of the following: the antenna port of the DMRS, the number of CDM groups of the DMRS, the CDM group number of the DMRS, the frequency domain location of the DMRS, the number of carriers offset by the CDM groups of the DMRS relative to the initial carrier, a frequency division multiplexing mask, or a time division multiplexing mask.

[0762] For example, the design of the DMRS for the first type of pattern is shown in at least one row of Table 8:

[0763] Table 8

[0764] p Δ CDM group number 0 0 0 1 1 1 2 2 2 3 3 3

[0765] Optionally, in Table 8, p can be the sequence number of the antenna port of the DMRS of the first type of pattern in the first frequency domain unit, the CDM group number in Table 8 is the group number of the CDM group included in the first frequency domain unit of the DMRS of the first type of pattern, and Δ in Table 8 is the number of carriers offset by the CDM group relative to the starting carrier.

[0766] Optionally, when the second type of drawing is the first type of drawing, the design of the DMRS for the second type of drawing can exist in multiple forms:

[0767] Example a1: The design of the second type of pattern DMRS includes: the antenna port of the DMRS, the CDM group number of the DMRS, and the number of carriers offset from the initial carrier in the CDM group of the DMRS.

[0768] Optionally, in example a1, if the second type of pattern DMRS occupies 2 resource units and 3 CDM groups in the second frequency domain unit of the second antenna port, then the design of the second type of pattern DMRS can be at least one row in Table 9 as follows:

[0769] Table 9

[0770]

[0771]

[0772] Optionally, in Tables 9 to 18 below, p can be the serial number of the antenna port of the DMRS of the second type of pattern in the second frequency domain unit, the CDM group number is the group number of the CDM group included in the second frequency domain unit of the DMRS of the second type of pattern, and Δ in Table 8 is the number of carriers offset by the CDM group relative to the starting carrier.

[0773] Optionally, in example a1, if the second type of pattern DMRS occupies 2 resource units and 6 CDM groups in the second frequency domain unit of the second antenna port, then the design of the second type of pattern DMRS can be at least one row in Table 10 as follows:

[0774] Table 10

[0775] p Δ CDM group number 0 0 0 1 0 0 2 1 2 3 1 2 4 2 4 5 2 4 6 3 6 7 3 6 8 4 8 9 4 8 10 5 10 11 5 10

[0776] Example a2: The design of the DMRS for the second type of pattern includes: the antenna port of the DMRS, the CDM group number of the DMRS, the number of carriers offset from the initial carrier in the CDM group of the DMRS, and the frequency division multiplexing mask.

[0777] Optionally, in Example a2, when the second type of pattern DMRS occupies 2 resource units and 3 CDM groups in the second frequency domain unit of the second antenna port, the design of the second type of pattern DMRS can be at least one row in Table 11 below:

[0778] Table 11

[0779] p Δ CDM group number [[w f (0)w f (1)]]]> 0 0 0 [+1+1] 1 0 0 [+1-1] 2 1 2 [+1+1] 3 1 2 [+1-1] 4 2 4 [+1+1] 5 2 4 [+1-1]

[0780] Optionally, in Example a2, when the second type of pattern DMRS occupies 2 resource units and 6 CDM groups in the second frequency domain unit of the second antenna port, the design of the second type of pattern DMRS can be at least one row in Table 12 as follows:

[0781] Table 12

[0782]

[0783]

[0784] Optionally, the above [w f (0)w f (1)] is the frequency division multiplexing mask.

[0785] For example, when the second type of drawing is a second type of drawing, the design of the DMRS for the second type of drawing can exist in several forms:

[0786] Example b1: When the design of the DMRS of the second type pattern includes: the antenna port of the DMRS, the CDM group number of the DMRS, and the number of carriers of the CDM group of the DMRS offset relative to the initial carrier.

[0787] Optionally, in example b1, if the port numbering is frequency domain numbering followed by time domain numbering, then the design of the DMRS for the second type of pattern should refer to at least one row in Table 13:

[0788] Table 13

[0789] p Δ CDM group number 0 0 0 1 0 0 2 1 2 3 1 2 4 2 4 5 2 4 6 3 6 7 3 6 8 4 8 9 4 8 10 5 10 11 5 10 12 6 0 13 6 0 14 7 2 15 7 2 16 8 4 17 8 4 18 9 6 19 9 6 20 10 8 21 10 8 22 11 10 23 11 10

[0791] Optionally, in example b1, if the port numbering is time-domain numbering followed by frequency-domain numbering, then the design of the DMRS for the second type of pattern should refer to at least one row in Table 14:

[0792] Table 14

[0793]

[0794] Example b2: The design of the second type of pattern DMRS includes: the antenna port of the DMRS, the CDM group number of the DMRS, the number of carriers offset from the initial carrier in the CDM group of the DMRS, the frequency division multiplexing mask, and the time division multiplexing mask.

[0795] Optionally, in example b2, if the port numbering is frequency domain numbering followed by time domain numbering, then the design of the DMRS for the second type of pattern should refer to at least one row in Table 15:

[0796] Table 15

[0797] p Δ CDM group number [[w f (0)w f (1)]]]> [[w t (0)w t (1)]]]> 0 0 0 [+1+1] [+1+1] 1 0 0 [+1-1] [+1+1] 2 1 2 [+1+1] [+1+1] 3 1 2 [+1-1] [+1+1] 4 2 4 [+1+1] [+1+1] 5 2 4 [+1-1] [+1+1] 6 3 6 [+1+1] [+1+1] 7 3 6 [+1-1] [+1+1] 8 4 8 [+1+1] [+1+1] 9 4 8 [+1-1] [+1+1] 10 5 10 [+1+1] [+1+1] 11 5 10 [+1-1] [+1+1] 12 6 0 [+1+1] [+1+1] 13 6 0 [+1-1] [+1+1] 14 7 2 [+1+1] [+1+1] 15 7 2 [+1-1] [+1+1] 16 8 4 [+1+1] [+1+1] 17 8 4 [+1-1] [+1+1] 18 9 6 [+1+1] [+1+1] 19 9 6 [+1-1] [+1+1] 20 10 8 [+1+1] [+1+1] 21 10 8 [+1-1] [+1+1] 22 11 10 [+1+1] [+1+1] 23 11 10 [+1-1] [+1+1]

[0798] Optionally, the above [w t (0)w t (1)] is the time-division multiplexing mask.

[0799] Optionally, in example b2, if the port numbering is time-domain numbering followed by frequency-domain numbering, then the design of the DMRS for the second type of pattern should refer to at least one row in Table 16:

[0800] Table 16

[0801] p Δ CDM group number [[w f (0)w f (1)]]]> [[w t (0)w t (1)]]]> 0 0 0 [+1+1] [+1+1] 1 0 0 [+1-1] [+1+1] 2 1 0 [+1+1] [+1+1] 3 1 0 [+1-1] [+1+1] 4 2 2 [+1+1] [+1+1] 5 2 2 [+1-1] [+1+1] 6 3 2 [+1+1] [+1+1] 7 3 2 [+1-1] [+1+1] 8 4 4 [+1+1] [+1+1] 9 4 4 [+1-1] [+1+1] 10 5 4 [+1+1] [+1+1] 11 5 4 [+1-1] [+1+1] 12 6 6 [+1+1] [+1+1] 13 6 6 [+1-1] [+1+1] 14 7 6 [+1+1] [+1+1] 15 7 6 [+1-1] [+1+1] 16 8 8 [+1+1] [+1+1] 17 8 8 [+1-1] [+1+1] 18 9 8 [+1+1] [+1+1] 19 9 8 [+1-1] [+1+1] 20 10 10 [+1+1] [+1+1] 21 10 10 [+1-1] [+1+1] 22 11 10 [+1+1] [+1+1] 23 11 10 [+1-1] [+1+1]

[0802] For example, when the second type of drawing is a third type of drawing, the design of the DMRS for the second type of drawing can take many forms:

[0803] Example c1: When the DMRS design includes: the DMRS antenna port, the DMRS CDM group number, and the number of carriers offset from the initial carrier in the DMRS CDM group, the design of the DMRS for the second pattern should refer to at least one row in Table 17:

[0804] Table 17

[0805]

[0806]

[0807] Example c2: When the DMRS design includes: the DMRS antenna port, the DMRS CDM group number, the number of carriers offset from the initial carrier in the DMRS CDM group, the frequency division multiplexing mask, and the time division multiplexing mask, the design of the DMRS for the second pattern can be found in at least one row of Table 18:

[0808] Table 18

[0809] p Δ Figure 11 [[w f (0)w f (1)]]]> [[w t (0)w t (1)]]]> 0 0 0 [+1+1] [+1+1] 1 0 0 [+1-1] [+1+1] 2 0 0 [+1+1] [+1-1] 3 0 0 [+1-1] [+1-1] 4 1 2 [+1+1] [+1+1] 5 1 2 [+1-1] [+1+1] 6 1 2 [+1+1] [+1-1] 7 1 2 [+1-1] [+1-1] 8 2 4 [+1+1] [+1+1] 9 2 4 [+1-1] [+1+1] 10 2 4 [+1+1] [+1-1] 11 2 4 [+1-1] [+1-1] 12 3 6 [+1+1] [+1+1] 13 3 6 [+1-1] [+1+1] 14 3 6 [+1+1] [+1-1] 15 3 6 [+1-1] [+1-1] 16 4 8 [+1+1] [+1+1] 17 4 8 [+1-1] [+1+1] 18 4 8 [+1+1] [+1-1] 19 4 8 [+1-1] [+1-1] 20 5 10 [+1+1] [+1+1] 21 5 10 [+1-1] [+1+1] 22 5 10 [+1+1] [+1-1] 23 5 10 [+1-1] [+1-1]

[0810] Optionally, the third-type DMRS occupies one resource cell in the third frequency domain cell of the third antenna port. In the case of six CDM groups, the design of the third-type DMRS can be found in at least one row of Table 19 below:

[0811] Table 19

[0812] p ​ ​ 0 0 0 1 1 1 2 2 2 3 3 3 4 4 4 5 5 5

[0813] Optionally, the third type of DMRS occupies one resource cell in the third frequency domain cell of the third antenna port. In the case of 12 CDM groups, the design of the third type of DMRS can be found in Table 20 below:

[0814] Table 20

[0815] p ​ ​ 0 0 0 1 1 1 2 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 7 7 8 8 8 9 9 9 10 10 10 11 11 11

[0816] Optionally, the sequence of the first DMRS can be generated according to the following formula:

[0817]

[0818] The first device assumes that the sequence r(n) is based on the scaling factor β. DMRS The transmitted power is quantized and mapped onto physical resource units (REs) according to the following formula:

[0819]

[0820] k′=0,1,2

[0821] k″=0,1

[0822]

[0823] n = 0, 1, ...

[0824] j = 0, 1, ..., v-1

[0825] In the above formula, c init The initial values ​​for scrambling the pseudo-random sequence are: It is the slot number within the frame. It is the number of symbols in the time slot, k refers to the subcarrier in the frequency domain, and l is the symbol in the time domain.

[0826] Optionally, and Δ can be determined according to the table above.

[0827] Optional, It can be determined through at least one of the following optional implementation methods:

[0828] In mode d1, when the PDSCH is scheduled by a PDCCH using DCI format 1_1, 1_2, or 1_3, and the CRC is scrambled by C-RNTI, MCS-C-RNTI, or CS-RNTI, if higher-level parameters are provided in the DMRS-DownlinkConfig IE, then These are given by the higher-level parameters scrapblingID0 and scrapblingID1, respectively.

[0829] In mode d2, when the PDSCH is scheduled by the PDCCH using DCI format 1_0, and the CRC is scrambled by C-RNTI, MCS-C-RNTI, or CS-RNTI, if higher-level parameters are provided in the DMRS-DownlinkConfig IE, then Given by the high-level parameter scrapmblingID0;

[0830] In mode d3, when the PDSCH multicasts on public MBS frequency resources and is scheduled by the PDCCH using DCI format 4_2, and the CRC is scrambled by G-RNTI or G-CS-RNTI, if higher-layer parameters are provided in the DMRS-DownlinkConfig IE, then These are given by the higher-level parameters scrapblingID0 and scrapblingID1, respectively.

[0831] In mode d4, when the PDSCH is on a common MBS frequency resource and scheduled by the PDCCH, and the CRC is scrambled by G-RNTI, G-CS-RNTI, MCCH-RNTI, or multicast-MCCH-RNTI, if higher-layer parameters are provided in the DMRS-DownlinkConfig IE, then... The values ​​1, ..., 65535 are given by the higher-level parameter scrapmblingID0;

[0832] Optionally, if it does not conform to the above methods d1-d4, then

[0833] Optionally, the above and This can be determined through at least one of the following examples:

[0834] Example 1: If the high-level parameter dmrs-Downlink is provided in the DMRS-DownlinkConfig IE, then

[0835]

[0836] Where λ is the CDM group defined in Clause 7.4.1.1.2.

[0837] Example 2: If the high-level parameter dmrs-Downlink is not provided in the DMRS-DownlinkConfig IE, then

[0838]

[0839] Optional, n SCID The value of ∈{0,1} is given by the DM-RS sequence initialization field in the DCI associated with PDSCH transmission. If DCI format 1_1, 1_2, 1_3, or 4_2 is used, then n SCID =0, otherwise it is given by DCI association, such as the first information field in DCI, which is used to indicate the relevant information of DMRS sequence.

[0840] Optionally, the first, second, or third information in this application may be sent from the third device to the first device, and the first device and the second device may perform DMRS transmission.

[0841] Optionally, the first information, second information, or third information in this application may be information received by the first device from the third device, and the first device and the second device may perform DMRS transmission.

[0842] Optionally, the first, second, or third information in this application may be sent from the third device to the second device, and the first device and the second device may perform DMRS transmission.

[0843] Optionally, the first, second, or third information in this application may be information received by the second device from the third device, and the first device and the second device may perform DMRS transmission.

[0844] Please see ​ This application provides a communication device 1100, which can realize the functions of the first device (or second device) in the above method embodiments, and therefore can also achieve the beneficial effects of the above method embodiments. In this application embodiment, the communication device 1100 can be the first device (or the second device), or it can be an integrated circuit or component inside the first device (or the second device), such as a chip, baseband chip, modem chip, SoC chip (e.g., an SoC chip containing a modem core), SIP chip, communication module, chip system, processor, etc.

[0845] It should be noted that the transceiver unit 1102 may include a transmitting unit and a receiving unit, which are used to perform transmitting and receiving respectively.

[0846] In one possible implementation, when the device 1100 is for performing Figure 3 When the method executed by the first device in the relevant embodiments is performed, the device 1100 includes a processing unit 1101 and a transceiver unit 1102; the processing unit 1101 is used to determine a first resource of the first demodulation reference signal DMRS, the first resource pattern of the first resource includes at least one or more of a first type pattern, a second type pattern, or a third type pattern, the DMRS of the first type pattern occupies 3 resource units in the first frequency domain unit of the first antenna port; the DMRS of the second type pattern occupies 2 resource units in the second frequency domain unit of the second antenna port; the DMRS of the third type pattern occupies 1 resource unit in the third frequency domain unit of the third antenna port; the transceiver unit 1102 is used to transmit or receive the first DMRS on the first resource.

[0847] In one possible implementation, when the device 1100 is for performing Figure 3 When the method executed by the second device in the related embodiments is performed, the device 1100 includes a processing unit 1101 and a transceiver unit 1102; the processing unit 1101 is used to determine a first resource of the first demodulation reference signal DMRS, the first resource pattern of the first resource includes at least one or more of a first type pattern, a second type pattern, or a third type pattern, the DMRS of the first type pattern occupies 3 resource units in the first frequency domain unit of the first antenna port; the DMRS of the second type pattern occupies 2 resource units in the second frequency domain unit of the second antenna port; the DMRS of the third type pattern occupies 1 resource unit in the third frequency domain unit of the third antenna port; the transceiver unit 1102 is used to transmit or receive the first DMRS on the first resource.

[0848] In one possible design, when the communication device 1100 is a terminal device or a communication module within a terminal, the function of the processing unit 1101 can be implemented by one or more processors. Specifically, the processor may include a modem chip, a SoC chip (such as a SoC chip containing a modem core), or a SIP chip. The function of the transceiver unit 1102 can be implemented by transceiver circuitry.

[0849] In one possible design, when the communication device 1100 is a circuit or chip in a terminal responsible for communication functions, such as a modem chip, a SoC chip, or a SoC chip or SIP chip containing a modem core, the function of the processing unit 1101 can be implemented by a circuit system in the aforementioned chip that includes one or more processors or processor cores. The function of the transceiver unit 1102 can be implemented by the interface circuitry or data transceiver circuitry on the aforementioned chip.

[0850] It should be noted that the information execution process of the unit of the above-mentioned communication device 1100 can be specifically described in the method embodiment shown above in this application, and will not be repeated here.

[0851] Please see Figure 12 This is another schematic structural diagram of the communication device 1200 provided in this application. The communication device 1200 includes a logic circuit 1201 and an input / output interface 1202. The communication device 1200 can be a chip or an integrated circuit.

[0852] in, Figure 11 The transceiver unit 1102 shown can be a communication interface, which can be... Figure 12 The input / output interface 1202 may include an input interface and an output interface. Alternatively, the communication interface may also be a transceiver circuit, which may include an input interface circuit and an output interface circuit.

[0853] In one possible implementation, when the device 1200 is for performing Figure 3 When the method executed by the first device in the related embodiments is performed, the logic circuit 1201 is used to determine the first resource of the first demodulation reference signal DMRS. The first resource pattern of the first resource includes at least one or more of a first type pattern, a second type pattern, or a third type pattern. The DMRS of the first type pattern occupies 3 resource units in the first frequency domain unit of the first antenna port; the DMRS of the second type pattern occupies 2 resource units in the second frequency domain unit of the second antenna port; and the DMRS of the third type pattern occupies 1 resource unit in the third frequency domain unit of the third antenna port. The input / output interface 1202 is used to transmit or receive the first DMRS on the first resource.

[0854] In one possible implementation, when the device 1200 is for performing Figure 3 When the method executed by the second device in the related embodiments is performed, the logic circuit 1201 is used to determine a first resource of the first demodulation reference signal DMRS. The first resource pattern of the first resource includes at least one or more of a first type pattern, a second type pattern, or a third type pattern. The DMRS of the first type pattern occupies 3 resource units in the first frequency domain unit of the first antenna port; the DMRS of the second type pattern occupies 2 resource units in the second frequency domain unit of the second antenna port; and the DMRS of the third type pattern occupies 1 resource unit in the third frequency domain unit of the third antenna port. The input / output interface 1202 is used to transmit or receive the first DMRS on the first resource.

[0855] The logic circuit 1201 and the input / output interface 1202 can also perform other steps executed by the communication device in the previous embodiment and achieve corresponding beneficial effects, which will not be elaborated here.

[0856] In one possible implementation, Figure 11 The processing unit 1101 shown can be Figure 12 The logic circuit 1201 in the middle.

[0857] Optionally, the logic circuit 1201 can be a processing device, the functions of which can be partially or entirely implemented in software.

[0858] Optionally, the processing apparatus may include a memory and a processor, wherein the memory is used to store a computer program, and the processor reads and executes the computer program stored in the memory to perform the corresponding processing and / or steps in any of the method embodiments.

[0859] Optionally, the processing device may consist of only a processor. Memory for storing computer programs is located outside the processing device, and the processor is connected to the memory via circuitry / wires to read and execute the computer programs stored in the memory. The memory and processor may be integrated together or physically independent of each other.

[0860] Optionally, the processing device may be one or more chips, or one or more integrated circuits. For example, the processing device may be one or more field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), system-on-a-chip (SoCs), central processing units (CPUs), network processors (NPs), digital signal processors (DSPs), microcontroller units (MCUs), programmable logic devices (PLDs), or other integrated chips, or any combination of the above chips or processors.

[0861] Please see Figure 13 The communication device 1300 mentioned in the above embodiments provided for the purposes of this application can specifically be a communication device serving as a terminal device as described in the above embodiments. Figure 13 The example shown illustrates how a terminal device can be implemented through a terminal device (or a component within a terminal device).

[0862] The present invention provides a possible logical structure diagram of the communication device 1300, which may include, but is not limited to, at least one processor 1301 and a communication port 1302.

[0863] in, Figure 11 The transceiver unit 1102 shown can be a communication interface, which can be... Figure 13 The communication port 1302 may include an input interface and an output interface. Alternatively, the communication port 1302 may also be a transceiver circuit, which may include an input interface circuit and an output interface circuit.

[0864] Further optionally, the device may also include at least one of a memory 1303 and a bus 1304. In the embodiments of this application, the at least one processor 1301 is used to control the operation of the communication device 1300.

[0865] Furthermore, the processor 1301 can be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, etc. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0866] It should be noted that, Figure 13 The communication device 1300 shown can be used to implement the steps implemented by the terminal device in the aforementioned method embodiments, and to achieve the corresponding technical effects of the terminal device. Figure 13 The specific implementation of the communication device shown can be referred to the description in the foregoing method embodiments, and will not be repeated here.

[0867] Please see Figure 14 The above-described embodiment of the communication device 1400 is provided as an example of the present application. Specifically, the communication device 1400 can be a network device as described in the above embodiment. Figure 14 The example shown illustrates a network device implemented through a network device (or a component within a network device). The structure of this communication device can be referenced. Figure 14 The structure shown.

[0868] The communication device 1400 includes at least one processor 1411 and at least one interface 1414. Optionally, the communication device further includes at least one memory 1412, at least one transceiver 1413, and one or more antennas 1415. The processor 1411, memory 1412, transceiver 1413, and interface 1414 are connected, for example, via a bus. In this embodiment, the connection may include various interfaces, transmission lines, or buses, etc., and this embodiment is not limited thereto. The antenna 1415 is connected to the transceiver 1413. The interface 1414 is used to enable the communication device to communicate with other communication devices through a communication link. For example, the interface 1414 may include a network interface between the communication device and a core network device, such as an S1 interface. The network interface may also include a network interface between the communication device and other communication devices (e.g., other network devices or core network devices), such as an X2 or Xn interface.

[0869] in, Figure 11 The transceiver unit 1102 shown can be a communication interface, which can be... Figure 14 Interface 1414 in the above can include an input interface and an output interface. Alternatively, interface 1414 can also be a transceiver circuit, which can include an input interface circuit and an output interface circuit.

[0870] The processor 1411 is primarily used to process communication protocols and communication data, control the entire communication device, execute software programs, and process data from the software programs, for example, to support the communication device in performing the actions described in the embodiments. The communication device may include a baseband processor and a central processing unit. The baseband processor is primarily used to process communication protocols and communication data, while the central processing unit is primarily used to control the entire terminal device, execute software programs, and process data from the software programs. Figure 14 The processor 1411 can integrate the functions of a baseband processor and a central processing unit. Those skilled in the art will understand that the baseband processor and the central processing unit can also be independent processors interconnected via technologies such as buses. Those skilled in the art will understand that a terminal device can include multiple baseband processors to adapt to different network standards, and a terminal device can include multiple central processing units to enhance its processing capabilities. The various components of the terminal device can be connected via various buses. The baseband processor can also be described as a baseband processing circuit or a baseband processing chip. The central processing unit can also be described as a central processing circuit or a central processing chip. The function of processing communication protocols and communication data can be built into the processor or stored in memory as a software program, with the processor executing the software program to implement the baseband processing function.

[0871] The memory is primarily used to store software programs and data. The memory 1412 can exist independently or be connected to the processor 1411. Optionally, the memory 1412 can be integrated with the processor 1411, for example, integrated within a single chip. The memory 1412 can store program code that executes the technical solutions of the embodiments of this application, and its execution is controlled by the processor 1411. The various types of computer program code being executed can also be considered as drivers for the processor 1411.

[0872] Figure 14 Only one memory and one processor are shown. In actual terminal devices, there may be multiple processors and multiple memories. Memory can also be called storage medium or storage device, etc. Memory can be a storage element on the same chip as the processor, i.e., an on-chip storage element, or it can be a separate storage element; this application does not limit this.

[0873] Transceiver 1413 can be used to support the reception or transmission of radio frequency signals between a communication device and a terminal. Transceiver 1413 can be connected to antenna 1415. Transceiver 1413 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 1415 can receive radio frequency signals. The receiver Rx of transceiver 1413 is used to receive the radio frequency signals from the antennas, convert the radio frequency signals into digital baseband signals or digital intermediate frequency signals, and provide the digital baseband signals or digital intermediate frequency signals to processor 1411 so that processor 1411 can perform further processing on the digital baseband signals or digital intermediate frequency signals, such as demodulation and decoding. In addition, the transmitter Tx in transceiver 1413 is also used to receive the modulated digital baseband signals or digital intermediate frequency signals from processor 1411, convert the modulated digital baseband signals or digital intermediate frequency signals into radio frequency signals, and transmit the radio frequency signals through one or more antennas 1415. Specifically, the receiver Rx can selectively perform one or more stages of downmixing and analog-to-digital conversion on the radio frequency signal to obtain a digital baseband signal or a digital intermediate frequency (IF) signal. The order of these downmixing and IF conversion processes is adjustable. The transmitter Tx can selectively perform one or more stages of upmixing and digital-to-analog conversion on the modulated digital baseband signal or digital IF signal to obtain a radio frequency signal. The order of these upmixing and IF conversion processes is also adjustable. The digital baseband signal and the digital IF signal can be collectively referred to as digital signals.

[0874] The transceiver 1413 can also be called a transceiver unit, transceiver, transceiver device, etc. Optionally, the device in the transceiver unit that performs the receiving function can be regarded as the receiving unit, and the device in the transceiver unit that performs the transmitting function can be regarded as the transmitting unit. That is, the transceiver unit includes a receiving unit and a transmitting unit. The receiving unit can also be called a receiver, input port, receiving circuit, etc., and the transmitting unit can be called a transmitter, transmitter, or transmitting circuit, etc.

[0875] It should be noted that, Figure 14 The communication device 1400 shown can be used to implement the steps implemented by the network device in the aforementioned method embodiments, and to achieve the corresponding technical effects of the network device. Figure 14 The specific implementation of the communication device 1400 shown can be referred to the description in the foregoing method embodiments, and will not be repeated here.

[0876] Please see Figure 15 The above-described embodiments of the communication device provided in this application are schematic diagrams of the structure of the communication device.

[0877] It is understood that the communication device 1500 includes, for example, modules, units, elements, circuits, or interfaces, which are appropriately configured together to execute the technical solutions provided in this application. The communication device 1500 may be the terminal device or network device described above, or a component (e.g., a chip) within these devices, used to implement the methods described in the following method embodiments. The communication device 1500 includes one or more processors 1501. The processor 1501 may be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the communication device (e.g., RAN node, terminal, or chip), execute software programs, and process data from the software programs.

[0878] Optionally, in one design, processor 1501 may include program 1503 (sometimes also referred to as code or instructions), which can be executed on processor 1501 to cause communication device 1500 to perform the methods described in the embodiments below. In yet another possible design, communication device 1500 includes circuitry (…). Figure 15 (Not shown).

[0879] Optionally, the communication device 1500 may include one or more memories 1502 storing a program 1504 (sometimes referred to as code or instructions), which can be run on the processor 1501 to cause the communication device 1500 to perform the methods described in the above method embodiments.

[0880] Optionally, the processor 1501 and / or memory 1502 may include artificial intelligence (AI) modules 1507 and 1508, which are used to implement AI-related functions. The AI ​​module can be implemented through software, hardware, or a combination of both. For example, the AI ​​module may include a radio intelligence control (RIC) module. For instance, the AI ​​module can be a near real-time RIC or a non-real-time RIC.

[0881] Optionally, the processor 1501 and / or memory 1502 may also store data. The processor and memory may be configured separately or integrated together.

[0882] Optionally, the communication device 1500 may further include a transceiver 1505 and / or an antenna 1506. The processor 1501, sometimes referred to as a processing unit, controls the communication device (e.g., a RAN node or terminal). The transceiver 1505, sometimes referred to as a transceiver unit, transceiver, transceiver circuit, or transceiver, is used to implement the transmission and reception functions of the communication device via the antenna 1506.

[0883] in, Figure 11 The processing unit 1101 shown may be a processor 1501. Figure 11 The transceiver unit 1102 shown can be a communication interface, which can be... Figure 15 The transceiver 1505 may include an input interface and an output interface. Alternatively, the transceiver 1505 may also be a transceiver circuit, which may include an input interface circuit and an output interface circuit.

[0884] This application also provides a computer-readable storage medium for storing one or more computer-executable instructions. When the computer-executable instructions are executed by a computer, the computer performs the method as described in the possible implementations of the first or second apparatus in the foregoing embodiments.

[0885] This application also provides a computer program product (or computer program) that, when executed by a computer, allows the computer to perform the method described in the first or second device implementation.

[0886] This application also provides a chip system including at least one processor for supporting a communication device in implementing the functions involved in the possible implementations of the communication device described above. Optionally, the chip system further includes an interface circuit that provides program instructions and / or data to the at least one processor. In one possible design, the chip system may also include a memory for storing the program instructions and data necessary for the communication device. The chip system may be composed of chips or may include chips and other discrete devices, wherein the communication device may specifically be the first device or the second device in the aforementioned method embodiments.

[0887] This application also provides a communication system, which includes the first device in any of the above embodiments.

[0888] Optionally, the communication system may also include a second device.

[0889] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between devices or units, and may be electrical, mechanical, or other forms. Whether a function is implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0890] The unit described as a separate component may or may not be physically separate. The component shown as a unit may or may not be a physical unit; that is, it may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0891] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

Claims

1. A communication method characterized by comprising: Comprising: determining a first resource of a first demodulation reference signal (DMRS), a first resource pattern of the first resource comprising at least one or more of a first pattern, a second pattern or a third pattern, the DMRS of the first pattern occupying 3 resource elements in a first frequency domain unit of a first antenna port; the DMRS of the second pattern occupying 2 resource elements in a second frequency domain unit of a second antenna port; the DMRS of the third pattern occupying 1 resource element in a third frequency domain unit of a third antenna port; transmitting or receiving the first DMRS on the first resource.

2. The method of claim 1, wherein, Further comprising: receiving first information indicating that the first resource pattern is the first pattern, the second pattern or the third pattern.

3. The method according to claim 1 or 2, characterized in that, Further comprising: receiving second information indicating at least one of: an antenna port occupied by the first DMRS, a code division multiplexing (CDM) group number of the first DMRS, or a frequency domain location of the first DMRS.

4. The method according to any one of claims 1 to 3, characterized in that, The method further comprises: receiving third information comprising: related information of the first resource pattern.

5. The method of claim 1, wherein, Further comprising: transmitting first information indicating that the first resource pattern is the first pattern, the second pattern or the third pattern.

6. The method according to claim 1 or 5, characterized in that, Further comprising: transmitting second information indicating at least one of: an antenna port occupied by the first DMRS, a code division multiplexing (CDM) group number of the first DMRS, or a frequency domain location of the first DMRS.

7. The method according to claim 1 or 5 or 6, characterized in that, Further comprising: transmitting third information comprising: related information of the first resource pattern.

8. The method according to any one of claims 1 to 7, characterized in that, There is a correlation between at least two of the antenna port occupied by the first DMRS, the CDM group number of the first DMRS and the frequency domain location of the first DMRS.

9. The method according to any one of claims 1 to 8, characterized in that, The first resource pattern is one or more of a resource pattern of a non-zero power channel state information reference signal (NZP-CSI-RS).

10. The method according to any one of claims 1 to 9, characterized in that, The first frequency domain unit comprises at most 4 CDM groups; and / or, The second frequency domain unit comprises at most 12 CDM groups; and / or, The third frequency domain unit comprises at most 12 CDM groups.

11. The method according to any one of claims 1 to 10, characterized in that, A first CDM group of the DMRS of the first pattern occupies subcarriers k1, k1+4 and k1+8 in the first frequency domain unit, where k1≥0 and k1 is an integer; and / or, A second CDM group of the DMRS of the second pattern occupies subcarriers k2 and k2+1 in the second frequency domain unit, where k2=2N and N≥0, N being an integer; and / or, A third CDM group of the DMRS of the third pattern occupies subcarrier k3 in the third frequency domain unit, where k3≥0 and k3 is an integer.

12. The method according to any one of claims 1 to 11, characterized in that, The second antenna port of the DMRS of the second pattern occupies 2 resource elements in one frequency domain unit in time domain and one frequency domain in frequency domain.

13. The method according to any one of claims 1 to 12, characterized in that, The second antenna port of the DMRS of the second pattern occupies 4 resource units in time domain two symbols and frequency domain one frequency domain unit.

14. The method according to any one of claims 1 to 13, characterized in that, When the first DMRS is single symbol, the second frequency domain unit of the DMRS of the second pattern includes at most 6 code division multiplexing groups.

15. The method according to any one of claims 1 to 14, characterized in that, When the first DMRS is double symbol, the second frequency domain unit of the DMRS of the second pattern includes at most 6 code division multiplexing groups or 12 code division multiplexing groups.

16. The method according to any one of claims 1 to 15, characterized in that, The determining the first resource of the first demodulation reference signal DMRS comprises: Determining a resource pattern of the first resource according to a communication carrier where the first resource is located.

17. The method of claim 16, wherein, When the communication carrier is a shared carrier, the resource pattern of the first resource is the first resource pattern.

18. A communications device, characterized by The apparatus comprises a module for performing the method of any one of claims 1 to 17.

19. A communications device, characterized by The apparatus comprises at least one processor configured to perform the method of any one of claims 1 to 17.

20. The communication apparatus according to claim 19, wherein, The apparatus is a chip or a chip system.

21. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program or instructions, which, when executed by an apparatus, implement the method of any one of claims 1 to 17.

22. A computer program product, characterised in that, The computer program or instructions, when executed by a computer, implement the method of any one of claims 1 to 17.

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