Communication method and related apparatus

Abstract

A communication method and a related apparatus. In the method, a first apparatus determines a first resource of a first demodulation reference signal (DMRS), wherein a first resource pattern of the first resource comprises 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 three resource units in a first frequency domain unit of a first antenna port, the DMRS of the second-type pattern occupies two resource units in a second frequency domain unit of a second antenna port, and the DMRS of the third-type pattern occupies one resource unit in a third frequency domain unit of a third antenna port; and the first apparatus sends or receives the first DMRS on the first resource. The method can improve the transmission performance of DMRSs, and can achieve MU space-division multiplexing between a plurality of apparatuses.

Description

A communication method and related apparatus

[0001] The present application claims priority from the Chinese patent application No. 202411255593.6 filed on September 6, 2024, and entitled "A communication method and related apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication, and in particular to a communication method and related apparatus. BACKGROUND

[0003] Wireless communication can be transmission communication between two or more communication devices without propagating through a conductor or cable. Generally, the two or more communication devices include a network device and a terminal device, or the two or more communication devices include different terminal devices.

[0004] At present, in the process of wireless communication, the network device and the terminal device need to transmit a demodulation reference signal (DMRS). The DMRS is used for data demodulation. For example, the network device can precode data together with the DMRS, and then send it to the terminal device through a wireless channel, so that the terminal device can demodulate the data according to the DMRS.

[0005] However, how to improve the transmission performance of the DMRS is a technical problem to be solved. SUMMARY

[0006] The present application provides a communication method and related apparatus for improving the transmission performance of the DMRS.

[0007] The first aspect of the present application provides a communication method, which is applied to a first device, such as being executed by the first device. The first device can be a communication device (such as a terminal device or a network device), or the first device can be a part of the communication device (for example, a circuit or a chip responsible for communication functions (such as a Modem chip, also known as a baseband chip, or a SoC chip or a SIP chip containing a Modem core, etc.), or the first device can also be a logic module or software capable of realizing all or part of the functions of the communication device. In the 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 pattern, a second pattern or a third pattern. The DMRS of the first pattern occupies 3 resource units in a first frequency domain unit of a first antenna port. The DMRS of the second pattern occupies 2 resource units in a second frequency domain unit of a second antenna port. The DMRS of the third pattern occupies 1 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.

[0008] In the first aspect, the first resource pattern of the first resource of the first DMRS can be one or more of the first pattern, the second pattern or the third pattern. Regardless of the first pattern, the second pattern or the third pattern, only not more than 3 resource units can be occupied in one frequency domain unit of one antenna port. It can be seen that, in the first aspect, due to the design of the first resource pattern, the first DMRS can occupy fewer resource units. On the one hand, the bandwidth consumed by the first DMRS can be saved, and on the other hand, the transmission rate of the first DMRS is improved due to the reduction of the data amount of the first DMRS, thereby improving the transmission performance of the DMRS.

[0009] In a possible implementation manner of the first aspect, the first device receives first information. The first information is used to indicate that the first resource pattern is the first pattern, the second pattern or the third pattern.

[0010] In the above implementation manner, the first device can determine the type of the first resource pattern according to the first information, and then 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 flexible determination of the type of the first resource pattern, meet different communication requirements, and improve the communication performance.

[0011] In a possible implementation of the first aspect, the first device receives second information, the second information being used to indicate at least one of: an antenna port occupied by the first DMRS, a code division multiplexing group number of the first DMRS, or a frequency domain position of the first DMRS.

[0012] 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, and can achieve 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 position of the first DMRS, meet different communication requirements, and improve communication performance.

[0013] In a possible implementation of the first aspect, the first device receives third information, the third information including: related information of the first resource pattern.

[0014] Based on the above implementation, the first device can be indicated that the resource pattern of the first resource is the first resource pattern, thereby avoiding causing interference to the first DMRS.

[0015] In a possible implementation of the first aspect, the first device sends the first information, the first information being 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.

[0016] 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 of the first resource pattern according to the type of the first resource pattern, to achieve flexible determination of the type of the first resource pattern, meet different communication requirements, and improve communication performance.

[0017] In a possible implementation of the first aspect, the first device sends the second information, the second information being used to indicate at least one of: an antenna port occupied by the first DMRS, a code division multiplexing group number of the first DMRS, or a frequency domain position of the first DMRS.

[0018] Based on the above implementation, 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 position of the first DMRS by sending the second information to the other devices, and can achieve 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 position of the first DMRS, meet different communication requirements, and improve communication performance.

[0019] In a possible implementation of the first aspect, the first device sends the third information, and the third information comprises: related information of the first resource pattern.

[0020] Based on the above implementation, the first device can indicate the other device that the resource pattern of the first resource is the first resource pattern, thereby avoiding causing interference to the first DMRS.

[0021] In a possible implementation of the first aspect, there is an association relationship between at least two of the following: an antenna port occupied by the first DMRS, a code division multiplexing group number of the first DMRS, and a frequency domain position of the first DMRS.

[0022] Based on the above implementation, since there is an association relationship between at least two of the following: an antenna port occupied by the first DMRS, a code division multiplexing group number of the first DMRS, and a frequency domain position of the first DMRS, one of them can be determined based on the other, for example, the code division multiplexing group number of the first DMRS can be determined according to the antenna port occupied by the first DMRS, which can help the first device or the other device to 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, and the like. 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 position of the first DMRS.

[0023] Optionally, the first device can send the first information, the second information, and / or the third information through high-layer signaling, for example, the high-layer signaling can be radio resource control (RRC) signaling, for example, the high-layer signaling can be media access control (MAC) control element (CE) signaling; or the first device can send the first information, the second information, and / or the third information through physical layer signaling, for example, the physical layer signaling can be downlink control information (DCI).

[0024] Optionally, the third information comprises the second information, or the third information can be sent simultaneously with the second information, or the third information can be sent first and then the second information, or the second information can be sent first and then the third information.

[0025] Optionally, the third information comprises first indication information, wherein the first indication information is used to indicate the design manner 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 manner of the first resource pattern.

[0026] Optionally, the protocol can specify that the first frequency domain unit can include 2 or 4 code division multiplexing (CDM) groups, or the protocol can specify that the second frequency domain unit can include 3 or 6 CDM groups, and / or the protocol can specify that the third frequency domain unit can include 6 or 12 CDM groups; or the second device can 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 can 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.

[0027] Optionally, the second information can include third indication information, the third indication information being an identifier of an antenna port occupied by the first DMRS.

[0028] Optionally, the second information can include fourth indication information, the fourth indication information being a code division multiplexing group number of the first DMRS.

[0029] Optionally, the second information can include fifth indication information, the fifth indication information being used to indicate a frequency domain position of the first DMRS.

[0030] Optionally, the fifth indication information can indicate at least one of a starting frequency domain unit position and / or a frequency domain unit number of the first resource.

[0031] Optionally, the fifth indication information can indicate a resource block group (RBG) index to which the first resource belongs.

[0032] Optionally, the fifth indication information can indicate a position of a rate-matched frequency domain resource in the frequency domain resource of the first data channel.

[0033] Optionally, the index of the RBG can be an RBG index in a carrier or a bandwidth part (BWP), or an RBG index in the frequency domain resource of the first data channel.

[0034] Optionally, the fifth indication information can indicate a third index corresponding to a starting frequency domain unit position of the first resource, the third index being used to indicate one of one or more starting frequency domain unit positions.

[0035] Optionally, the RB length is pre-defined by a protocol or configured by RRC signaling.

[0036] Optionally, the fifth indication information can 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 numbers of frequency domain units.

[0037] Optionally, the starting RB is pre-defined by a protocol.

[0038] Optionally, the second information can include sixth indication information used to configure a time domain location of the first resource.

[0039] Optionally, the sixth indication information can indicate a first bit map used to determine a symbol location of the first resource.

[0040] Optionally, the symbol location can be indicated within a time slot.

[0041] Optionally, the symbol location can be indicated on a time domain resource of the first data channel.

[0042] For example, the sixth indication information can indicate at least one of a starting time unit location, a number of time units, and a time domain density of the first resource.

[0043] Optionally, the starting symbol location indication is indicated within a time slot.

[0044] Optionally, the starting symbol location can be indicated on a time domain resource of the first data channel.

[0045] Optionally, the symbol length can be 1, or 2, etc.

[0046] Optionally, the starting symbol location can be pre-defined, such as a starting symbol of a time slot, or a starting symbol of the first data channel, etc.

[0047] Optionally, the symbol length is pre-defined by a protocol, or configured by RRC signaling.

[0048] For example, the sixth indication information can indicate a second bit map.

[0049] For example, the second device indicates candidate symbol locations to the first device through RRC signaling.

[0050] For another example, the second device sends a DCI to the first device, the DCI indicating a symbol location or a bit map.

[0051] For example, the sixth indication information can indicate a second index corresponding to a starting time unit location of the first resource, the second index being used to indicate one of the one or more starting time unit locations.

[0052] For example, the second device indicates the candidate starting symbol position to the first device through RRC signaling.

[0053] For example, the second device sends the DCI to the first device, and the DCI indicates the starting symbol position.

[0054] Optionally, the symbol length is pre-defined by a protocol or configured by RRC signaling.

[0055] In a possible implementation of the first aspect, the first resource pattern is one or more of resource patterns of non-zero-power channel state information reference signals (NZP-CSI-RS).

[0056] The above implementation can reduce the interference of other signals or channels on the DMRS and improve the communication performance. For example, taking the first device as a 6G terminal device, the first device can be a 5G terminal device, and the third device is an access network device shared by the 6G terminal device and the 5G terminal device. When the resource pattern of the DMRS resource of the 6G terminal device is one or more of the resource patterns of the NZP-CSI-RS, the access network device sends a zero-power channel state information reference signal (ZP-CSI-RS) resource position to the 5G terminal device, so that the 5G terminal device performs rate matching on the DMRS of the 6G terminal device when transmitting data, that is, the DMRS resource of the 6G terminal device is not used. Thus, the transmission of the 6G DMRS is avoided from being interfered by the data transmission of the 5G, and the multiple users (MU) spatial division multiplexing of the 5G UE and the 6G UE is realized, and the communication performance is improved.

[0057] In a 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.

[0058] In the above implementation, a plurality of corresponding relationships between the frequency domain units and the code division multiplexing groups are provided, that is, a plurality of code division multiplexing schemes are designed. Thus, one or more code division multiplexing schemes can be selected according to the needs of the terminal device (such as a user) or the current network environment, so as to improve the communication performance.

[0059] Optionally, the first device can determine the number of CDM groups occupied by the first DMRS on one frequency domain unit according to the type of the first resource pattern. For example, the first device receives first information indicating that the first resource pattern is the first type of pattern, so that the first device can determine that the number of CDM groups occupied by the first DMRS on one frequency domain unit is one or more of 1-4.

[0060] Optionally, at least one of 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 can be predefined, configured or indicated.

[0061] In a possible implementation of the first aspect, the first code division multiplexing group of the DMRS of the first type of pattern occupies subcarriers k1, k1+4 and k1+8 in the first frequency domain unit, where k1≥0, k1 is an integer; and / or the second code division multiplexing group of the DMRS of the second type of pattern occupies subcarriers k2 and k2+1 in the second frequency domain unit, where k2=2N, N≥0, N is an integer; and / or the third code division multiplexing group of the DMRS of the third type of pattern occupies subcarriers k3 in the third frequency domain unit, where k3≥0, k3 is an integer.

[0062] Based on the above implementation, the intervals of the subcarriers corresponding to different patterns are different, that is, the corresponding frequency domain positions are different. On the one hand, the present application provides diversified frequency domain position design schemes, thereby improving the flexibility of the frequency domain position, and on the other hand, the intervals between the subcarriers in the above implementation are the same as the intervals between the subcarriers of the NZP-CSI-RS resource defined by the protocol, so that the rate matching of the DMRS can be implemented without changing the protocol, thereby improving the communication performance.

[0063] In a possible implementation of the first aspect, the second antenna port of the DMRS of the second type of pattern occupies 2 resource units in one symbol in the time domain and one frequency domain unit in the frequency domain.

[0064] Based on the above implementation, the second antenna port occupies fewer resource units, which can reduce the occupation of the resource by the second antenna port and save the spectrum resource.

[0065] In a 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.

[0066] Based on the above implementation, time domain code division multiplexing can be performed, thereby improving the utilization rate of the spectrum.

[0067] In a possible implementation of the first aspect, 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.

[0068] According to the above implementation, the first DMRS occupies a small number of symbols, and thus the overhead caused by the first DMRS is small.

[0069] In a possible implementation of the first aspect, 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.

[0070] According to the above implementation, the first DMRS is double-symbol, and thus the result of channel estimation is more accurate when the channel estimation is performed by using the first DMRS, and the communication performance can be improved.

[0071] In a possible implementation of the first aspect, the first device determines the resource pattern of the first resource according to a communication carrier where the first resource is located.

[0072] In the above implementation, the first device does not need to interact with other devices to determine the resource pattern of the first resource, and thus the interaction delay of signaling can be shortened, and the overhead of signaling can be reduced.

[0073] In a 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.

[0074] In the above implementation, while reducing the interference caused by other data transmission or channel / signal to the transmission of the first DMRS, the resource of the control channel can be used for data transmission as much as possible, so as to improve the resource utilization and the spectrum efficiency.

[0075] The second aspect of the present application provides a communication method, which is applied to a second device, such as being executed by the second device. The second device can be a communication device (such as a terminal device or a network device), or the second device can be a part of the communication device (such as a circuit or a chip responsible for communication functions (such as a Modem chip, also known as a baseband chip, or a SoC chip or a SIP chip containing a Modem core, etc.), or the second device can also be a logic module or software capable of realizing all or part of the communication device functions. In the 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 pattern, a second pattern or a third pattern, the DMRS of the first pattern occupies 3 resource units in a first frequency domain unit of a first antenna port; the DMRS of the second pattern occupies 2 resource units in a second frequency domain unit of a second antenna port; the DMRS of the third pattern occupies 1 resource unit in a third frequency domain unit of a third antenna port; and the second device transmits or receives the first DMRS on the first resource.

[0076] In a possible implementation of the second aspect, the second device transmits the first information, and the first information is used to indicate that the first resource pattern is the first pattern, the second pattern or the third pattern.

[0077] In the above implementation, the second 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 information of the first resource pattern according to the type of the first resource pattern, so as to realize flexible determination of the type of the first resource pattern, meet different communication requirements, and improve communication performance.

[0078] In a possible implementation of the second aspect, the second device transmits the second information, and the second information is used to indicate at least one of the following: an antenna port occupied by the first DMRS, a code division multiplexing group number of the first DMRS, or a frequency domain position of the first DMRS.

[0079] Based on the above implementation, the second 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 position of the first DMRS by transmitting the second information to other devices, so as to realize 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 position of the first DMRS, meet different communication requirements, and improve communication performance.

[0080] In a possible implementation of the second aspect, the second device transmits the third information, and the third information includes related information of the first resource pattern.

[0081] Based on the above implementation manner, the second device can indicate the resource pattern of the first resource of the other device as the first resource pattern, thereby avoiding causing interference to the first DMRS.

[0082] Optionally, the second device can send the first information, the second information and / or the third information through high layer signaling, such as the high layer signaling can be RRC signaling, such as the high layer signaling can be MAC CE signaling; or the second device can send the first information, the second information and / or the third information through physical layer signaling, such as the physical layer signaling can be DCI.

[0083] Optionally, the third information includes the second information, or the third information can be sent simultaneously with the second information, or the third information can be sent first and then the second information, or the second information can be sent first and then the third information.

[0084] Optionally, the third information includes first indication information, wherein the first indication information is used to indicate the design manner of the resource pattern of the first resource, for example, the first indication information can be the identification of the first resource pattern, thereby indicating that the resource pattern of the first resource adopts the design manner of the first resource pattern.

[0085] Optionally, the protocol can specify that the first frequency domain unit can include 2 or 4 CDM groups, or the protocol can specify that the second frequency domain unit can include 3 or 6 CDM groups, and / or the protocol can specify that the third frequency domain unit can include 6 or 12 CDM groups; or the second device can send second configuration information to the second device, the second configuration information 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 and / or the number of CDM groups corresponding to the third frequency domain unit; or the second device can send second indication information to the second device, the second indication information 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.

[0086] Optionally, the second information can include third indication information, and the third indication information is the identification of the antenna port occupied by the first DMRS.

[0087] Optionally, the second information can include fourth indication information, and the fourth indication information is the code division multiplexing group number of the first DMRS.

[0088] Optionally, the second information can include fifth indication information, and the fifth indication information is used to indicate the frequency domain position of the first DMRS.

[0089] Optionally, the fifth indication information can indicate at least one of a starting frequency domain unit position and / or a frequency domain unit quantity of the first resource.

[0090] Optionally, the fifth indication information can indicate an RBG index to which the first resource belongs.

[0091] Optionally, the fifth indication information can indicate a position of a rate-matched frequency domain resource in a frequency domain resource of the first data channel.

[0092] Optionally, the index of the RBG can be an RBG index in a carrier or in a BWP, or an RBG index in a frequency domain resource of the first data channel.

[0093] Optionally, the fifth indication information can indicate a third index corresponding to a starting frequency domain unit position of the first resource, the third index being used to indicate one of one or more starting frequency domain unit positions.

[0094] Optionally, the RB length is pre-defined by a protocol, or configured by RRC signaling.

[0095] Optionally, the fifth indication information can indicate a fourth index corresponding to a frequency domain unit quantity of the first resource, the fourth index being used to indicate one of one or more frequency domain unit quantities.

[0096] Optionally, the starting RB is pre-defined by a protocol.

[0097] Optionally, the second information can include sixth indication information used to configure a time domain position of the first resource.

[0098] Optionally, the sixth indication information can indicate a first bit map used to determine a symbol position of the first resource.

[0099] Optionally, the symbol position can be indicated in a time slot.

[0100] Optionally, the symbol position can be indicated on a time domain resource of the first data channel.

[0101] Optionally, the sixth indication information can indicate at least one of a starting time unit position, a time unit quantity, and a time domain density of the first resource.

[0102] Optionally, the starting symbol position indication is indicated in a time slot.

[0103] Optionally, the starting symbol position can be indicated on a time domain resource of the first data channel.

[0104] Optionally, the symbol length can be 1, or 2, etc.

[0105] Optionally, the starting symbol position can be predefined, such as a starting symbol of a slot, or a starting symbol of the first data channel, etc.

[0106] Optionally, the symbol length is predefined by a protocol, or configured by RRC signaling.

[0107] For example, the sixth indication information can indicate the second bitmap.

[0108] For example, the second device indicates the candidate symbol position to the second device by RRC signaling.

[0109] For example, the second device indicates the candidate symbol position to the second device by RRC signaling.

[0110] For example, the sixth indication information can indicate the second index corresponding to the starting time unit position of the first resource, and the second index is used to indicate one of the one or more starting time unit positions.

[0111] For example, the second device indicates the candidate starting symbol position to the second device by RRC signaling.

[0112] For example, the second device indicates the candidate starting symbol position to the second device by RRC signaling.

[0113] Optionally, the symbol length is predefined by a protocol, or configured by RRC signaling.

[0114] In a possible implementation of the second aspect, there is an association relationship between at least two of the following: an antenna port occupied by the first DMRS, a code division multiplexing group number of the first DMRS, and a frequency domain position of the first DMRS.

[0115] Based on the above implementation, since there is an association relationship between at least two of the following: an antenna port occupied by the first DMRS, a code division multiplexing group number of the first DMRS, and a frequency domain position of the first DMRS, one of them can be determined based on the other, for example, the code division multiplexing group number of the first DMRS can be determined according to the antenna port occupied by the first DMRS, which can help the second device or other devices to 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. 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 position of the first DMRS.

[0116] In a possible implementation of the second aspect, the first resource pattern is one or more of resource patterns of NZP-CSI-RS.

[0117] ​The implementation manner can reduce the interference of other signals or channels on the DMRS, and improve the communication performance. For example, taking the second device as a 6G terminal device, the second device can be a 5G terminal device, and the third device is an access network device shared by the 6G terminal device and the 5G terminal device. When the resource pattern of the DMRS resource of the 6G terminal device is one or more of the resource patterns of the NZP-CSI-RS, the access network device sends the ZP-CSI-RS resource position to the 5G terminal device, so that the 5G terminal device performs rate matching on the DMRS of the 6G terminal device during data transmission, that is, the DMRS resource of the 6G terminal device is not used. Therefore, the data transmission of the 5G terminal device does not interfere with the transmission of the 6G DMRS, and the multi-user MU spatial division multiplexing of the 5G UE and the 6G UE is realized, and the communication performance is improved.

[0118] In a possible implementation manner 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.

[0119] In the implementation manner, a plurality of corresponding relationships between the frequency domain units and the code division multiplexing groups are provided, that is, a plurality of code division multiplexing schemes are designed. Therefore, one or more code division multiplexing schemes can be selected according to the needs of the terminal device (such as a user) or the current network environment, thereby improving the communication performance.

[0120] Optionally, the second device can determine the number of CDM groups occupied by the first DMRS on one frequency domain unit according to the type of the first resource pattern. For example, the second device receives first information indicating that the first resource pattern is the first type of pattern, so that the second device can determine that the number of CDM groups occupied by the first DMRS on one frequency domain unit is one or more of 1-4.

[0121] 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.

[0122] In a possible implementation of the second aspect, the first code division multiplexing 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, k1 is an integer; and / or the second code division multiplexing group of the DMRS of the second pattern occupies subcarriers k2 and k2+1 in the second frequency domain unit, where k2=2N, N≥0, N is an integer; and / or the third code division multiplexing group of the DMRS of the third pattern occupies subcarriers k3 in the third frequency domain unit, where k3≥0, k3 is an integer.

[0123] Based on the above implementation, the intervals of the subcarriers corresponding to different patterns are different, that is, the corresponding frequency domain positions are different. On the one hand, the present application provides diversified frequency domain position design schemes, thereby improving the flexibility of the frequency domain position, and on the other hand, the intervals between the subcarriers in the above implementation are the same as the intervals between the subcarriers of the NZP-CSI-RS resource defined in the protocol, so that the rate matching of the DMRS can be implemented without changing the protocol, thereby improving the communication performance.

[0124] In a possible implementation of the second aspect, the second antenna port of the DMRS of the second pattern occupies 2 resource units in one symbol in the time domain and one frequency domain unit in the frequency domain.

[0125] Based on the above implementation, the second antenna port occupies fewer resource units, so that the occupation of the resource by the second antenna port can be reduced, thereby saving the spectrum resource.

[0126] In a possible implementation of the second aspect, the second antenna port of the DMRS of the second pattern occupies 4 resource units in two symbols in the time domain and one frequency domain unit in the frequency domain.

[0127] Based on the above implementation, time domain code division multiplexing can be performed, thereby improving the utilization rate of the spectrum.

[0128] In a 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 pattern includes at most 6 code division multiplexing groups.

[0129] Based on the above implementation, since the number of symbols occupied by the first DMRS is small, the overhead caused by the first DMRS is small.

[0130] In a possible implementation of the second aspect, when the first DMRS is a 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.

[0131] Based on the above implementation manner, the first DMRS is double-symbol, and thus the result of channel estimation is more accurate when the channel estimation is performed based on the first DMRS, and the communication performance can be improved.

[0132] In a possible implementation manner of the second aspect, the second device determines the resource pattern of the first resource according to a communication carrier where the first resource is located.

[0133] In the above implementation manner, the second device does not need to interact with other devices to obtain the resource pattern of the first resource, and thus the interaction delay of signaling can be shortened, and the signaling overhead can be reduced.

[0134] In a possible implementation manner of the second aspect, when the communication carrier is a shared carrier, the resource pattern of the first resource is the first resource pattern.

[0135] In the above implementation manner, while reducing the interference of other data transmission or channel / signal to the transmission of the first DMRS, the resource of the control channel can be used for data transmission as much as possible, so as to improve the resource utilization and the spectrum efficiency.

[0136] The third aspect of the present application provides a communication device, which is a first device, and the device comprises a transceiver unit and a processing unit; the processing unit is configured to determine a first resource of a first demodulation reference signal (DMRS), and the first resource pattern of the first resource comprises 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 3 resource units in a first frequency domain unit of a first antenna port; the DMRS of the second type of pattern occupies 2 resource units in a second frequency domain unit of a second antenna port; and the DMRS of the third type of pattern occupies 1 resource unit in a third frequency domain unit of a third antenna port; and the transceiver unit is configured to send or receive the first DMRS on the first resource.

[0137] In the third aspect of the present application, the component modules of the communication device can also be configured to perform the steps performed in the various possible implementation manners of the first aspect, and achieve the corresponding technical effects, which can be referred to the first aspect for details, and will not be described here.

[0138] The fourth aspect of the present application provides a communication device, the device being a second device, the device 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 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 units in a first frequency domain unit of a first antenna port; the DMRS of the second pattern occupying 2 resource units in a second frequency domain unit of a second antenna port; the DMRS of the third pattern occupying 1 resource unit in a third frequency domain unit of a third antenna port; and the transceiver unit is configured to transmit or receive the first DMRS on the first resource.

[0139] In the fourth aspect of the present application, the component modules of the communication device can also be configured to perform the steps performed in the various possible implementation manners of the second aspect and achieve the corresponding technical effects, which can be referred to the second aspect for details and will not be described herein.

[0140] The fifth aspect of the present application provides a communication device, comprising at least one processor coupled with a memory; the memory is configured to store programs or instructions; and the at least one processor is configured to execute the programs or instructions to enable the device to implement the method described in any one of the possible implementation manners of the first aspect or the second aspect. Optionally, the communication device can comprise the memory.

[0141] The sixth aspect of the present application provides a communication device, comprising at least one logic circuit and an input-output interface; the logic circuit is configured to execute the method described in any one of the possible implementation manners of the first aspect or the second aspect.

[0142] The seventh aspect of the present application provides a communication system, comprising the first device and the second device.

[0143] The eighth aspect of the present application provides a computer-readable storage medium, the storage medium being configured to store one or more computer-executable instructions, when the computer-executable instructions are executed by a computer, the computer executes the method described in any one of the possible implementation manners of the first aspect or the second aspect.

[0144] The ninth aspect of the present application provides a computer program product (or computer program), when the computer program in the computer program product is executed by a computer, the computer executes the method described in any one of the possible implementation manners of the first aspect or the second aspect.

[0145] The tenth aspect of the present application provides a chip or a chip system, which comprises at least one processor for supporting a communication device to implement the method in any possible implementation manner of the first aspect or the second aspect. For example, the chip can be a baseband chip, a modem chip, an SoC chip (such as an SoC chip containing a Modem core), a SIP chip, or a communication module, etc.

[0146] In a possible design, the chip or the chip system can further comprise a memory for storing necessary program instructions and data of the communication device. The chip system can be composed of a chip, or can contain a chip and other discrete devices. Optionally, the chip system further comprises an interface circuit for providing program instructions and / or data for the at least one processor.

[0147] The technical effects brought by any design of the third aspect to the tenth aspect can be referred to the technical effects brought by different design manners of the first aspect or the second aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0148] FIGS. 1a to 1g are some schematic diagrams of a communication system provided by the present application;

[0149] FIGS. 2a to 2f are some schematic diagrams of a communication process related to the present application;

[0150] FIG. 3 is a schematic diagram of a communication method provided by the present application;

[0151] FIG. 4 is a schematic diagram of an application scenario provided by the present application;

[0152] FIG. 5 is a schematic diagram of a data mapping process provided by the present application;

[0153] FIGS. 6a to 6d are some schematic diagrams of a first type of pattern provided by the present application;

[0154] FIGS. 7a to 7f are some schematic diagrams of a first pattern provided by the present application;

[0155] FIG. 8 is a schematic diagram of a second pattern provided by the present application;

[0156] FIG. 9 is a schematic diagram of a third pattern provided by the present application;

[0157] FIGS. 10a to 10d are some schematic diagrams of a third type of pattern provided by the present application;

[0158] FIGS. 11 to 15 are some schematic diagrams of a communication device provided by the present application. DETAILED DESCRIPTION

[0159] First, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

[0160] (1) Terminal device: can be a wireless terminal device capable of receiving network device scheduling and instruction information, and the wireless terminal device can be a device that provides voice and / or data connectivity to a terminal device (such as a user), or a handheld device with wireless connection function, or other processing devices connected to a wireless modem.

[0161] A terminal device can communicate with one or more core networks or the Internet via a radio access network (RAN), and the terminal device can be a mobile terminal device, such as a mobile phone (or called "cellular" phone, mobile phone), a computer, and a data card, for example, a portable, pocket, handheld, computer built-in, or vehicle-mounted mobile device that exchanges voice and / or data with a radio access network. For example, a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a Pad, a computer with wireless transceiver function, and the like. The wireless terminal device can also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station (MS), a remote station, an access point (AP), a remote terminal, an access terminal, a user terminal, a user agent, a subscriber station (SS), customer premises equipment (CPE), a terminal, user equipment (UE), a mobile terminal (MT), a drone, and the like. The terminal device can also be a wearable device and a next-generation communication system, such as a terminal device in a 5G communication system or a terminal device in a future evolved public land mobile network (PLMN), and the like.

[0162] The terminal can be widely applied to various scenarios, for example, device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), internet of things (IOT), virtual reality, augmented reality, industrial control, automatic driving, remote medical treatment, smart power grid, smart furniture, smart office, smart wear, smart transportation, smart city, communication and sensing integration, etc. The terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, an airplane, a ship, a robot, a mechanical arm, a smart home device, a sensor, etc. Embodiments of the present application do not limit the specific technology and specific device form of the terminal.

[0163] (2) Network device (or network element): can be a device in a wireless network, for example, the network device can be a RAN node (or device) for accessing a terminal device to a wireless network, which can also be called a base station. At present, some examples of RAN devices are: base station, evolved NodeB (eNodeB), base station gNB (gNodeB) in 5G communication system, transmission reception point (TRP), evolved Node B (eNB), radio network controller (RNC), Node B (NB), home base station (for example, 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, the network device can include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node.

[0164] Optionally, the RAN node can also be a macro base station, a micro base station or an indoor station, a relay node or a donor node, or a wireless controller in a cloud radio access network (CRAN) scenario. The RAN node can also be a server, a wearable device, a vehicle or a vehicle-mounted device, etc. For example, the access network device in V2X technology can be a road side unit (RSU).

[0165] The network device and / or the terminal device can be fixed in position or mobile. The network device and / or the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on water; can also be deployed on an airplane, a balloon, and a man-made satellite. Embodiments of the present application do not limit the application scenarios of the network device and / or the terminal device.

[0166] In another possible scenario, multiple RAN nodes cooperate to assist a terminal to implement wireless access, and different RAN nodes respectively implement part of the functions of a base station. For example, the RAN node can be a CU, a DU, a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. The CU and the DU can be separately arranged or can be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna processing unit (AAU), or a remote radio head (RRH).

[0167] In different systems, the CU (or CU-CP and CU-UP), DU, or RU can also have different names, but those skilled in the art can understand their meanings. For example, in an open RAN (O-RAN or ORAN) system, the CU can also be referred to as an O-CU (open CU), the DU can also be referred to as an O-DU, the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. For the convenience of description, the CU, the CU-CP, the CU-UP, the DU, and the RU are taken as examples for description in the present application. Any one of the CU (or the CU-CP, the CU-UP), the DU, and the RU in the present application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0168] The communication between the access network device and the terminal device follows a certain protocol layer structure. The protocol layer can include a control plane protocol layer and a user plane protocol layer. The control plane protocol layer can include at least one of a radio resource control (RRC) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, a media access control (MAC) layer, or a physical (PHY) layer, etc. The user plane protocol layer can include at least one of a service data adaptation protocol (SDAP) layer, a PDCP layer, an RLC layer, a MAC layer, or a physical layer, etc. Among them, the physical layer can include a high physical layer (higher PHY or PHY-high) and a low physical layer (lower PHY or PHY-low). The high physical layer functions include one or more of forward error correction (FEC) encoding / decoding, scrambling / descrambling, or modulation / demodulation. The physical layer (lower physical layer, Lower PHY) functions and radio frequency functions. The low physical layer functions include one or more of fast fourier transform (FFT) transform / inverse fast fourier transform (IFFT) transform, digital beamforming, or extraction and filtering of a physical random access channel (PRACH), etc.

[0169] For the correspondence between the network elements in the ORAN system and the protocol layer functions that can be implemented by the network elements, refer to Table 1 below.

[0170] Table 1

[0171] The network device can be other devices that provide wireless communication functions for terminal devices. Embodiments of the present application do not limit the specific technology and specific device form adopted by the network device. For the convenience of description, the embodiments of the present application do not limit.

[0172] The network device can further include a core network device, for example, including a mobility management entity (MME) in a fourth generation (4G) network, a home subscriber server (HSS), a serving gateway (S-GW), a policy and charging rules function (PCRF), a public data network gateway (P-GW), a network element such as an access and mobility management function (AMF), a user plane function (UPF), or a session management function (SMF) in a 5G network, and the like. In addition, the core network device can also include other core network devices in a 5G network and a next-generation network of the 5G network.

[0173] In the embodiments of the present application, the device for implementing the function of the network device can be a network device or a device capable of supporting the network device to implement the function, such as a chip system, which can be installed in the network device. In the technical solutions provided in the embodiments of the present application, the device for implementing the function of the network device is taken as an example to describe the technical solutions provided in the embodiments of the present application.

[0174] (3) Configuration and pre-configuration: in the present application, configuration and pre-configuration will be used simultaneously. Configuration refers to that the network device sends some parameter configuration information or parameter values to the terminal device through a message or signaling, so that the terminal device determines the communication parameters or the resources in the transmission according to the values or information. Pre-configuration is similar to configuration, which can be parameter information or parameter values agreed by the network device and the terminal device in advance, or parameter information or parameter values adopted by the network device and / or the terminal device according to a standard protocol, or parameter information or parameter values pre-stored in the network device and / or the terminal device. The present application does not limit this.

[0175] Further, the values and parameters can be changed, updated, or reconfigured.

[0176] (4) The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "At least one" refers to one or more, and "multiple" refers to two or more. "And / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the cases of A alone, A and B together, and B alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after it. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or multiple items. For example, "at least one of A, B, and C" includes A, B, C, AB, AC, BC, or ABC. In addition, unless otherwise specified, the ordinal numbers "first", "second", etc. mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, time sequence, priority or importance of the multiple objects.

[0177] (5) In the embodiments of the present application, "sending" and "receiving" represent the direction of signal transmission. For example, "sending information to XX" can be understood as that the destination of the information is XX, which can include direct sending through the air interface, or indirect sending through the air interface by other units or modules. "Receiving information from YY" can be understood as that the source of the information is YY, which can include direct receiving from YY through the air interface, or indirect receiving from YY through the air interface by other units or modules. "Sending" can also be understood as "output" of a chip interface, and "receiving" can also be understood as "input" of a chip interface.

[0178] In other words, sending and receiving can be between devices, such as between network devices and terminal devices, or within devices, such as between components, modules, chips, software modules or hardware modules within a device through a bus, wire or interface.

[0179] It can be understood that the information may be processed as necessary between the source and the destination of the information transmission, such as encoding and modulation, but the destination can understand the valid information from the source. Similar expressions in the present application can be similarly understood, and will not be repeated here.

[0180] (6) In the embodiments of the present application, "indication" can include direct indication and indirect indication, and can also include explicit indication and implicit indication. The information indicated by certain information (indication information described below) is referred to as to-be-indicated information. In the specific implementation process, there are many ways to indicate the to-be-indicated information, for example but not limited to, the to-be-indicated information can be directly indicated, such as the to-be-indicated information itself or an index of the to-be-indicated information. The to-be-indicated information can also be indirectly indicated by indicating other information, where the other information and the to-be-indicated information have an association relationship. The to-be-indicated information can also be indicated only by a part of the to-be-indicated information, and the other part of the to-be-indicated information is known or agreed in advance. For example, the indication of a specific information can be achieved by means of the arrangement order of each information agreed in advance (for example, predefined by a protocol), thereby reducing the indication overhead to a certain extent. The present application does not limit the specific manner of indication. It can be understood that the indication information can be used to indicate the to-be-indicated information for the sender of the indication information, and the indication information can be used to determine the to-be-indicated information for the receiver of the indication information.

[0181] (7) Rate matching.

[0182] Rate matching is used in wireless communication systems to adjust the rate of coded data bits to match 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 can be carried by the physical layer resource units. The goal of rate matching is to optimize data transmission efficiency, avoid the number of data bits exceeding the carrying capacity of the physical layer resources, while ensuring the reliability and efficiency of transmission.

[0183] Exemplarily, rate matching involves the following steps:

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

[0185] ② Bit selection: Then, by selecting part of the coded bit stream to match the number of bits that can be carried by the physical layer resources. This usually involves the insertion or deletion of bits 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, which changes the output order of the bit stream, but does not involve the addition or deletion of bits.

[0187] Generally, in NR systems, "puncturing" is an implementation of a rate matching technique, mainly used to adjust the rate of encoded data streams to accommodate different transmission requirements and channel conditions. The process of puncturing involves selectively deleting (or ignoring) part of the bits from the encoded bit stream to reduce the bit rate of the data stream to match the transmission resources of the physical layer. Specifically, when the number of encoded data bits exceeds the number of bits that the physical layer resources can carry, puncturing is needed to reduce the number of bits. The puncturing algorithm will select which bits to delete according to certain rules, which usually take into account the importance of the bits to minimize the impact on decoding performance.

[0188] In this application, except for special description, the same or similar parts between various embodiments can be mutually referred. In various embodiments of the present application, and various implementation manners / implementation methods / realization methods in each embodiment, if there is no special description and logical conflict, the terms and / or descriptions between different embodiments, and between various implementation manners / implementation methods / realization methods in each embodiment are consistent and can be mutually referred, and the technical features in different embodiments, and in various implementation manners / implementation methods / realization methods in each embodiment can be combined to form new embodiments, implementation manners, implementation methods, or realization methods according to their inherent logical relationship. The implementation manners of the present application described below do not constitute a limitation on the protection scope of the present application.

[0189] In order to facilitate understanding of the method provided by the embodiments of the present application, the system architecture of the method provided by the embodiments of the present application will be described below. It can be understood that the system architecture described in the embodiments of the present application is to more clearly illustrate the scheme of the embodiments of the present application, and does not constitute a limitation on the scheme provided by the embodiments of the present application.

[0190] In a possible implementation, the present application can be applied to a narrow band-Internet of things (NB-IoT) system, a global system for mobile communications (GSM) system, an enhanced data rate for GSM evolution (EDGE) system, a wideband code division multiple access (WCDMA) system, a code division multiple access (CDMA2000) system, a time division-synchronization code division multiple access (TD-SCDMA) system, an integrated sensing and communication (ISAC) communication system, a wireless local area network (WLAN) system, a short-range wireless communication system (such as a sidelink system, a wireless fidelity (Wi-Fi or WiFi) system, a Bluetooth system, or the like), a wired network, a vehicle to everything (V2X) communication system, a device-to-device (D2D) communication system, a vehicle-to-everything (V2X) communication system, a 4th generation (4G) mobile communication system (such as a long term evolution (LTE) system), an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a worldwide interoperability for microwave access (WiMAX) communication system, a 5th generation (5G) mobile communication system (such as a new radio (NR) system), a future evolved new radio (NR) wireless communication system, or another similar communication system, and the like, without limitation.For example, the present application can be applied to an orthogonal frequency division multiplexing (OFDM) system in LTE, an OFDM system in NR, and future OFDM systems and OFDM-like systems, for example, the present application can be applied to three major application scenarios of the next generation 5G mobile communication system: enhanced mobile broadband (eMBB), ultra-reliable low latency communication (URLLC), and / or enhanced machine type communication (eMTC).

[0191] Referring to FIG. 1a, an architecture diagram of a communication system 1000 to which embodiments of the present application can be applied is shown. As shown in FIG. 1a, the communication system includes a RAN 100 and a core network 200, and optionally, the communication system 1000 can further include the Internet 300. The RAN 100 includes at least one RAN node (e.g., 110a and 110b in FIG. 1a, collectively referred to as 110) and at least one terminal (e.g., 120a-120j in FIG. 1a, collectively referred to as 120). The RAN 100 can further include other RAN nodes, such as a wireless relay device and / or a wireless backhaul device (not shown in FIG. 1a). The terminal 120 is connected to the RAN node 110 in a wireless manner, and the RAN node 110 is connected to the core network 200 in a wireless or wired manner. The core network device in the core network 200 and the RAN node 110 in the RAN 100 can be independent and different physical devices, or can be the same physical device integrated with the logical functions of the core network device and the logical functions of the RAN node. Terminals and terminals, and RAN nodes and RAN nodes can be connected to each other in a wired or wireless manner.

[0192] FIG. 1b shows an example diagram of an O-RAN system, which can include other components than those shown in the figure. As shown, an access network device (such as a RAN device, which can be an eNB or a gNB or a next generation access network device) communicates with a core network (CN) over a backhaul and communicates with a UE over an air interface.

[0193] As an example, the RAN node can be a satellite base station or a satellite, which is described below in connection with FIGS. 1c-1g. FIGS. 1c and 1d are schematic diagrams of a communication system suitable for embodiments of the present application.

[0194] As shown in FIGS. 1c and 1d, the satellite base station provides communication services for the terminal. For example, the satellite base station transmits downlink data to the terminal, where the data is encoded using channel coding, and the channel-coded data is transmitted to the terminal after being modulated by constellation modulation. For another example, the terminal transmits uplink data to the satellite base station, where the uplink data can also be encoded using channel coding, and the encoded data is transmitted to the satellite base station after being modulated by constellation modulation. In addition, as shown in FIG. 1d, the satellite base station can also communicate with the ground base station, that is, the satellite can act as a base station, and also as a terminal.

[0195] In this application, the satellite can refer to a drone, a hot air balloon, a low-orbit satellite, a medium-orbit satellite, a high-orbit satellite, etc. The satellite can also refer to a non-ground base station or a non-ground device, etc.

[0196] It should be understood that the present application can be applied to a scenario in which network devices communicate with each other, and the scenario shown in FIG. 1d can also be regarded as an example of network devices communicating with each other, where the satellite and the base station can both be regarded as a network device.

[0197] As an implementation manner, the present application can be applied to a satellite inter-satellite link communication system. For example, the communication between satellite #1 and satellite #2 shown in FIG. 1d.

[0198] As shown in FIG. 1e, the satellite inter-satellite link communication system can be divided into two parts: an acquisition pointing tracking (APT) subsystem (including an APT module and an APT transmitter / receiver) and a communication subsystem (including a communication module and a transceiving antenna). The communication subsystem is mainly responsible for the transmission of inter-satellite information, and is the main body of the inter-satellite communication system; the APT system is mainly responsible for the acquisition, alignment and tracking between satellites. The direction of arrival of the incident signal can be determined, which is used for acquisition and adjustment of the direction of the transmitted wave aiming at the receiving direction, which is used for alignment. In the whole communication process, the APT is constantly adjusted for alignment and acquisition, which is used for tracking. In order to minimize the influence of attenuation and interference in the channel, while requiring high confidentiality and transmission rate, the APT must be adjusted in real time to adapt to changes constantly.

[0199] It should be understood that the current APT system is an optical system, which has the disadvantage of difficult optical alignment and the need for mechanical adjustment of the pointing direction. The current communication subsystem is mostly an optical communication system, and there are also some microwave band systems, which mostly use a single high-gain antenna. The current APT system and the communication subsystem are independent systems. The disadvantage is that optical communication is easily affected by vibration, etc., and the rate is unstable; the frequency of millimeter wave is low, the communication capacity is low, and the antenna needs to be mechanically adjusted for pointing.

[0200] As another implementation manner, the present application can be applied to a scenario in which terminal devices communicate with each other, for example, an Internet of Things communication system.

[0201] FIG. 1f is a schematic diagram of a wireless screen projection of an Internet of Things, which is applicable to the embodiments of the present application. A terminal device (for example, a smart phone) establishes a network connection with a television set. The smart phone transmits content that needs to be projected and displayed on the television set to the television set. After receiving the content transmitted by the smart phone, the television set displays the content on its display screen.

[0202] It should be understood that the screen projection scenario shown in FIG. 1f can be regarded as an example of terminal device-to-terminal device communication, in which the smart phone and the television set can both be regarded as a terminal device.

[0203] As yet another implementation manner, the present application can be applied to an integrated access and backhaul (IAB) system.

[0204] FIG. 1g is a schematic diagram of an IAB system, which is applicable to the embodiments of the present application. As shown in FIG. 1g, the 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. The present application can be applied to both parties of communication in the backhaul link, or both parties of communication in the access link.

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

[0206] In a wireless communication system (for example, the system shown in any one of FIGS. 1a to 1g), the wireless communication resource generally includes time-frequency resources. In the following, the time-frequency resources will be introduced taking the NR system as an example. It should be understood that NR can be replaced by 5G or 5G NR.

[0207] 1. Numerology.

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

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

[0210] Table 2

[0211] In Table 2, μ represents a subcarrier spacing index, or μ represents a numerology, CP length includes normal CP length and extended CP length, and FR represents a frequency range (FR).

[0212] 2. Frame structure.

[0213] In the NR system, the unit in time domain includes symbol, slot, subframe, half frame, frame, etc. The time of one frame is 10 ms, one frame can be divided into 10 subframes numbered 0-9, and the subframes numbered 0-4 form one half frame, and the subframes numbered 5-9 form another half frame. The time of each subframe is 1 ms. Each subframe can include one or more slots, and each slot includes 14 symbols under normal CP and 12 symbols under extended CP.

[0214] For example, the number of slots included in each subframe is related to SCS, and the association is shown in Table 3.

[0215] Table 3

[0216] As shown in the example of FIG. 2a, it is a schematic diagram of the frame structure of 5G NR, which includes:

[0217] Frame: The length is fixed at 10 ms, and the frame number range is 0-1023.

[0218] Subframe: The length is fixed at 1 ms, and the subframe number range is 0-9.

[0219] Slot: When normal CP is used, the length is 14 symbols. Since the symbol length is not fixed, the slot length is also not fixed. When the SCS is 60 kHz, extended CP can also be used, and the slot length is 12 symbols. Optionally, the slot is the smallest unit of data scheduling.

[0220] Symbol: The length is not fixed and is related to SCS. Optionally, the symbol is the basic unit of modulation.

[0221] Generally, in the physical layer, one symbol can contain a plurality of sampling points, and the sampling point can be the smallest time unit of the physical layer.

[0222] In addition, the scheduling time unit on the 5G NR data domain is a slot, the number of symbols contained in the slot is fixed, and the length of the symbol is related to the SCS. In the following, taking SCS of 30 kHz and 120 kHz as examples, the relationship between the frame, subframe, slot and symbol will be exemplarily described.

[0223] As shown in the examples of FIG. 2b and FIG. 2c, the relationship between the frame, subframe, slot and symbol corresponding to SCS of 30 kHz and 120 kHz respectively.

[0224] 3. Symbol type and slot format.

[0225] Generally, OFDM symbols include three types, which are:

[0226] Downlink (D): used for downlink transmission.

[0227] Uplink (U): used for uplink transmission.

[0228] Flexible (F): can be used for uplink transmission, can also be used for downlink transmission, and can also be used as a guard period (GP) or reserved resource.

[0229] Optionally, each slot can be freely combined by the three types of symbols to form various slot formats.

[0230] As shown in the example of FIG. 2d, according to the protocol-defined slot format, the slot type can be divided into four cases.

[0231] Case 1: only contains “D” symbols, which is also commonly referred to as a downlink-only slot (DL-only slot).

[0232] Case 2: only contains “U” symbols, which is also commonly referred to as a downlink-only slot (UL-only slot).

[0233] Case 3: only contains “F” symbols, which is also commonly referred to as a flexible-only slot.

[0234] Case 4: a slot contains at least one “D” or “U” symbol, and there is also an “F” symbol in the slot.

[0235] In addition, as shown in FIG. 2d, Case 4 can be further divided into several sub-cases.

[0236] Case 4-1: a slot contains more “D” symbols and fewer “F” symbols.

[0237] Case 4-2: One slot contains more "U" symbols and less "F" symbols.

[0238] Case 4-3: One slot contains more "D" symbols and less "F" and "U" symbols.

[0239] Case 4-4: One slot contains more "U" symbols and less "F" and "D" symbols.

[0240] Case 4-5: One slot contains alternating "D", "F" and "U" symbols.

[0241] As can be seen from the above examples, the slot format design of 5G NR can achieve uplink and downlink data changes at the symbol level, while LTE usually only achieves changes at the subframe level. This design is more flexible and also makes the slot type more diverse to adapt to different types of services in different scenarios.

[0242] 4. Self-contained slot.

[0243] Case 4-3, Case 4-4 and Case 4-5 in FIG. 2d are also called self-contained slots, which correspond to two structures of self-contained slots, respectively.

[0244] One structure is a DL-dominant slot: Case 4-3 in FIG. 2d, in which the slot is mainly used for downlink data transmission, and a small number of symbols are used for transmitting uplink control signals (such as hybrid automatic repeat request (HARQ) feedback of the downlink data) or sounding reference signals (SRS) through time division multiplexing, thereby shortening the downlink HARQ feedback delay.

[0245] Another structure is a UL-dominant slot: Case 4-4 in FIG. 2d, in which the slot is mainly used for uplink data transmission, and a small number of symbols are used for transmitting downlink control signals, such as uplink scheduling indications in the physical downlink control channel (PDCCH), through time division multiplexing, thereby shortening the uplink scheduling delay.

[0246] Generally, in the design of self-contained slot, both network device and terminal device can switch uplink and downlink transmission in one slot, and ensure normal work after switching by reserving guard time and not transmitting or receiving any signal in the guard time.

[0247] 5. Mini-slot.

[0248] In order to further reduce the air interface delay, the protocol proposes the concept of micro-slot, whose time domain length can be less than 14 symbols. Compared with the scheduling of basic slots, the division in time domain of micro-slots is more fine-grained, and the scheduling delay is also shorter. The scheduling of micro-slots is usually also called non-slot based scheduling.

[0249] 6. Frequency domain resource.

[0250] Resource element (RE) is the smallest physical layer resource of 5G NR, which is 1 subcarrier in frequency domain and 1 OFDM symbol in time domain.

[0251] Resource block (RB) is the basic unit of channel resource allocation in frequency domain of 5G NR, and one RB can contain 12 subcarriers in frequency domain. Since the subcarrier spacing in 5G NR is variable, the actual bandwidth of RB is also variable.

[0252] Resource grid (RG) is a set of time-frequency resources, which is defined as follows in 5G NR: for different numerologies on each carrier, an RG is a set of resources of all subcarriers in frequency domain and all symbols in time domain with a length of one subframe, and the starting point of frequency domain is in RB granularity. Since different numerologies correspond to different SCS, and one RB is 12 subcarriers, for the same transmission bandwidth, the number of RBs contained in RG is different under different numerologies. RG is one subframe in time domain. Meanwhile, uplink and downlink RGs are defined respectively.

[0253] As shown in FIG. 2e, it is a schematic diagram of one implementation of resource division of RE, RB and RG. In FIG. 2e, one subframe in time domain can include a plurality of OFDM symbols; one RE represents a resource with 1 subcarrier in frequency domain and 1 OFDM symbol in time domain; one RB contains 12 subcarriers in frequency domain; and RG represents a set of time-frequency resources.

[0254] Common resource block (CRB) can be understood as a general term for all RBs in 5G NR, numbered from 0, and the center frequency point of the 0th subcarrier in CRB0 is also Point A.

[0255] Physical resource block (PRB) refers to the RBs contained in the BWP of a certain terminal device in 5G NR, also numbered from 0, and is the basic unit of data channel scheduling.

[0256] RBG refers to the combination of a number of PRBs within the BWP, also numbered from 0, and is the basic unit of data channel scheduling. An RBG can contain {2, 4, 8, 16} PRBs, and the specific number is related to the number of RBs in the BWP and the configuration options.

[0257] Resource element group (REG) is the basic unit of control channel resources. One REG is 12 subcarriers in the frequency domain, i.e., the width of one RB, and 1 OFDM symbol in the time domain.

[0258] Control channel element (CCE) is the basic unit of control channel resource scheduling, and one CCE is composed of 6 REGs in the frequency domain.

[0259] As shown in FIG. 2f, it is a schematic diagram of the relationship between REG and CCE.

[0260] As described above, the definition of time-frequency resources of NR, the same definition can be used in future networks, or different definitions can be used. For example, future networks can define multiple subcarrier spacings, not limited to SCS in 5G. One slot can include one or more symbols, one RB can include one or more subcarriers, etc.

[0261] Among them, the PDCCH resource is finally mapped to the RB, but one PDCCH will occupy a large number of RBs, and it is not very convenient to describe the resources occupied by PDCCH in terms of RB, so the concepts of REG and CCE are introduced. One CCE corresponds to 6 REGs, and each REG corresponds to one RB, as shown in the following figure. The resources that PDCCH can occupy and the resources that PDCCH actually occupies are described in terms of CCE. For example: in a 100MHz (273RB) bandwidth, the subcarrier spacing in one symbol is 30kHz, and there are a maximum of 45 CCEs (270RBs).

[0262] Optionally, in the NR system, the PDCCH is defined to use {1, 2, 4, 8, 16} contiguous CCEs, where the number of CCEs used is also referred to as the aggregation level, as shown in the following table. The worse the wireless channel quality, the larger the aggregation level of the PDCCH 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 can also result in resource waste. The gNodeB determines the aggregation level used by a PDCCH according to factors such as channel quality. For example, a terminal device at the edge of a cell should use a PDCCH format with a larger CCE aggregation level to trade resources for demodulation performance; a terminal device at the center of a cell can use a PDCCH format with a smaller CCE aggregation level to save time-frequency resources.

[0263] For example, the implementation of the CCE aggregation level can refer to the manner shown in Table 4 below.

[0264] Table 4

[0265] Optionally, the PDCCH has the following format on the time-frequency resource:

[0266] In the time domain: {1, 2, 3} symbols occupy 1 slot.

[0267] In the frequency domain: it can be the full bandwidth, or it can be configured by a parameter.

[0268] Generally, the time-frequency position of the DMRS (i.e., DMRS for PDCCH) on the PDCCH is fixed at subcarriers 1, 5, and 9 of each REG in the PDCCH corresponding symbol. In order to more effectively demodulate the PDCCH, the DMRS of a PDCCH is mapped to one of every 4 subcarriers in the REG (i.e., subcarriers 1, 5, and 9 of each REG), that is, the DMRS on the PDCCH occupies 1 / 4 of the PDCCH overhead, and the density of this reference signal is higher than 1 / 6 of the LTE. Using PDCCH-specific DMRS increases the overhead of the reference signal, but also brings benefits, such as being able to perform beamforming for each terminal device. Through beamforming of the PDCCH, the coverage and performance of the NR PDCCH are improved, which also conforms to the beam-centric design philosophy of NR.

[0269] 7. Transmit or receive

[0270] Physical reception link control channel (PRxCCH): is a kind of physical layer control channel, generally, the standard protocol is described from the perspective of terminal equipment, that is, the physical layer control channel received by the terminal equipment, which is similar to the PDCCH in LTE and 5G. PRxCCH can be a newly introduced physical layer control channel in the next generation communication system (such as 6G). Of course, in the next generation communication system (such as 6G), it is also possible to still use PDCCH to represent the physical downlink control channel or the physical transmission link control channel of the terminal equipment.

[0271] Physical reception link shared channel (PRxSCH): is a kind of physical layer data channel, generally, the standard protocol is described from the perspective of terminal equipment, that is, the physical layer data channel received by the terminal equipment, which is similar to the PDSCH in LTE and 5G. PRxSCH can be a newly introduced physical layer data channel in the next generation communication system (such as 6G). Of course, in the next generation communication system (such as 6G), it is also possible to still use PDSCH to represent the physical downlink data channel or the physical reception link data channel of the terminal equipment.

[0272] Physical transmission link control channel (PTxCCH): is a kind of physical layer control channel, generally, the standard protocol is described from the perspective of terminal equipment, that is, the physical layer control channel transmitted by the terminal equipment, which is similar to the PUCCH in LTE and 5G. PTxCCH can be a newly introduced physical layer control channel in the next generation communication system (such as 6G). Of course, in the next generation communication system (such as 6G), it is also possible to still use PUCCH to represent the physical uplink control channel or the physical transmission link control channel of the terminal equipment.

[0273] Physical Transmission Link Shared Channel (PTxSCH): a kind of physical layer data channel. Generally, the standard protocol is described from the perspective of terminal equipment, that is, the physical layer data channel transmitted by the terminal equipment, which is similar to the PUSCH in LTE and 5G. PTxSCH can be a newly introduced physical layer data channel in the next generation communication system (such as 6G). Of course, in the next generation communication system (such as 6G), it is also possible to still use PUSCH to represent the physical uplink data channel or the physical reception link data channel of the terminal equipment.

[0274] Optionally, for downlink, it can be described as receiving from the perspective of terminal equipment; for uplink, it can be described as transmitting from the perspective of terminal equipment.

[0275] At present, in the process of wireless communication, network equipment and terminal equipment need to transmit DMRS. The DMRS is used for data demodulation. For example, the network equipment can precode data and DMRS together, and then transmit it to the terminal equipment through the wireless channel, so that the terminal equipment can demodulate the data according to the DMRS.

[0276] However, how to improve the transmission performance of DMRS is a technical problem to be solved.

[0277] As an example, taking the communication process between network equipment and terminal equipment as an example, the network equipment and the terminal equipment can transmit data through various channels or signals. Generally, different channels or signals have different priorities, for example, the priority of reference signals (such as DMRS and cell-specific reference signals (CRS)) is generally higher than that of control channels (such as PDCCH) and service channels (such as PDSCH). When the resources of different channels or signals conflict, the transmission of the channel or signal with low priority will avoid the resources occupied by the channel or signal with high priority, so as to improve the transmission performance of the channel or signal with high priority. For example, the PDSCH of NR will avoid the resources occupied by the CRS of LTE. Correspondingly, in the above implementation example, the transmission of the channel or signal with low priority causes less interference to the transmission of the channel or signal with high priority, and when the channel or signal with high priority is used for data transmission, the data transmission performance of the channel or signal with high priority can be improved through the above example.

[0278] However, in the above example, the resources occupied by the channel or signal with low priority will completely avoid the resources occupied by the channel or signal with high priority, which leads to low spectrum efficiency.

[0279] 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.

[0280] 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.

[0281] 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.

[0282] 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.

[0283] 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.

[0284] However, the above example only provides the rate matching method for NR's PDSCH, which limits its application scenarios.

[0285] To solve the above problems, the present application provides a communication method and related devices, which will be described in detail below in conjunction with the accompanying drawings.

[0286] Please refer to FIG. 3, which is an implementation schematic diagram of the communication method provided by the present application.

[0287] It should be understood that in the following, the method flowchart takes different communication devices (such as the interaction between the first device and the second device, etc.) as an example to illustrate the execution subject of the interaction, but the present application does not limit the execution subject of the interaction. For example, any communication device (such as the first device, the second device, or the third device) can be a communication device, or a chip, a baseband chip, a Modem chip, a system on chip (SoC) chip containing a Modem core, a system in package (SIP) chip, a communication module, a chip system, a processor, a logic module, or software in a communication device, etc. Optionally, the communication device can be a terminal device or a network device (for example, the network device can be an access network device, an access network element, etc.).

[0288] As an example, in FIG. 3, 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 are network devices. For example, the network device can be an access network device, a communication device (such as at least one of a CU, a DU, and a RU) in an ORAN system.

[0289] As another example, in FIG. 3, both the first device and the second device are terminal devices. For example, when the scheme shown in FIG. 3 is applied to a sidelink communication scenario, both the first device and the second device can be terminal devices.

[0290] In FIG. 3, the communication method provided by the present application includes the following steps:

[0291] S301. The first device determines a first resource of a first demodulation reference signal (DMRS), wherein a 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; and the DMRS of the third type pattern occupies 1 resource unit in a third frequency domain unit of a third antenna port.

[0292] S302. The first device transmits or receives the first DMRS on the first resource.

[0293] Optionally, step S301 can also be replaced by: the first device determines a resource pattern of the first DMRS; or, the first device determines a type of the resource pattern of the first DMRS; or, the first device determines a frequency domain position of the first DMRS.

[0294] Optionally, step S302 can also be replaced by: the first device transmits the first DMRS on the first resource; or, the first device transmits data according to the first DMRS; or, the first device sends or receives data according to the first DMRS.

[0295] Optionally, the first resource can be a DMRS resource.

[0296] Optionally, the first resource includes at least one or more of the following: a time domain resource or a frequency domain resource.

[0297] Optionally, the first resource pattern includes 3 types of patterns, i.e., a first type of pattern (case A), a second type of pattern (case B), and a third type of pattern (case C).

[0298] Optionally, the first type of pattern is an example of naming, which can also be replaced by any possible naming, for example, it can also be named as a first type, a first configuration, a first configuration type, a first type of pattern, a first pattern, a first pattern set, a first pattern mode, a first mode, or a first pattern type, etc. The second type of pattern and the third type of pattern can also be replaced by any possible naming, which can refer to the description of the first type of pattern, and will not be described here.

[0299] Optionally, the resource pattern is an example of naming, which can also be replaced by any possible naming, for example, it can also be named as a pattern, a RE pattern, a subcarrier pattern, etc.

[0300] Optionally, the first resource pattern can include a subcarrier in a frequency domain unit, where a is a positive integer.

[0301] Optionally, the resource unit can be the smallest unit of time-frequency resource, and can include one or more resources in time-frequency domain, such as one or more symbols in time domain and one or more subcarriers in frequency domain. For example, a resource unit can be a resource of one symbol in time domain and one subcarrier in frequency domain. For example, the resource unit can be a RE, which can be in one or more resource grids (RGs). Alternatively, the resource unit can also be other implementation manners specified by standards / protocols.

[0302] Optionally, the "DMRS of the first type occupies 3 resource elements in the first frequency domain unit of the first antenna port" is an exemplary statement, which can be replaced by any possible statement, for example, the DMRS of the first type occupies 3 resource elements in the first frequency domain unit of the first antenna port, or the DMRS of the first type occupies 3 resource elements in the first frequency domain unit of the first antenna port. Similarly, the "DMRS of the second type occupies 2 resource elements in the second frequency domain unit of the second antenna port", and the "DMRS of the third type occupies 1 resource element in the third frequency domain unit of the third antenna port" can be replaced by any possible statement, which can be referred to the replacement of the "DMRS of the first type occupies 3 resource elements in the first frequency domain unit of the first antenna port", and details are not repeated here.

[0303] Optionally, the RBs on each of the one or more symbols share 12 subcarriers, and a frequency domain unit includes 12 subcarriers 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.

[0304] Optionally, the indexes of the 12 subcarriers can be 0, 1, 2,..., or 11.

[0305] 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.

[0306] Optionally, the resource pattern of the DMRS in the present application includes at least one or more of the following patterns: a first resource pattern, a resource pattern of 5G DMRS, a resource pattern of LTE DMRS, or a resource pattern of 4G DMRS. When the resource pattern of the DMRS is the first resource pattern, the resource pattern of the DMRS can be one or more of the first type, the second type, or the third type.

[0307] Optionally, the first type of pattern can include one or more patterns. Optionally, the first type of pattern can include different patterns, for example, the first type of pattern can 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 can also include one or more patterns, and the description of the first type of pattern can be referred to, and details are not described herein.

[0308] Optionally, the second device also needs to determine the first resource of the first demodulation reference signal DMRS.

[0309] For step S302, taking the communication between the first device and the second device as an example for description:

[0310] For example, when the first device transmits the first DMRS, the second device receives the first DMRS; when the second device transmits the first DMRS, the first device receives the first DMRS.

[0311] For another example, the first device can perform data transmission according to the first DMRS. For example, the first device needs to transmit DMRS in data transmission, and the DMRS is used for channel estimation and / or data demodulation. Wherein, the data transmission includes data transmission and / or data reception. For example, the first device receives data of the second device, or the first device transmits data to the second device. Wherein, the data transmission can be the transmission of signals or the transmission of information, for example, the data transmission can be the transmission of control information, and the first DMRS is used for control channel.

[0312] As described above, there are many possible cases of the resource pattern of the DMRS, and there are many possible cases of the resource of the DMRS, so the first device needs to determine the first resource of the first demodulation reference signal DMRS, that is, step S301 needs to be performed. Optionally, the first device can determine the first resource of the first demodulation reference signal DMRS in many ways, such as at least one of the following ways:

[0313] Method 1a: The second device transmits third information, and the third information includes: the related information of the first resource pattern. Correspondingly, the first device receives the third information.

[0314] In method 1a, the second device can indicate the related 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 consumed by the first device, and in addition, the second device can determine the resource pattern of the first resource according to the current situation, such as the occupation of the current spectrum resource, so that the second device can allocate the spectrum resource more reasonably.

[0315] 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 can 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 the related information of the first resource pattern, the first device can determine that the resource pattern of the first resource is the first resource pattern.

[0316] Optionally, the third information includes first indication information, wherein the first indication information is used to indicate the design manner of the resource pattern of the first resource, for example, the first indication information can be the identifier of the first resource pattern, so as to indicate that the resource pattern of the first resource adopts the design manner of the first resource pattern.

[0317] Optionally, the third information includes first configuration information, and the first configuration information is used to configure the first resource.

[0318] Optionally, different resource patterns can correspond to different configurations:

[0319] For example, the first resource pattern corresponds to configuration 1, the resource pattern of 5G DMRS corresponds to configuration 2, and the resource pattern other than the first resource pattern and the resource pattern of 5G corresponds to configuration 3.

[0320] Optionally, the third information can carry a configuration identifier, and the configuration identifier is used to identify the above-mentioned configuration 1, configuration 2 or configuration 3. For example, 2 bits in the first configuration information can be used to carry the configuration identifier, such as the first bit and the second bit in the first configuration information are 10, which is used to indicate configuration 1, at this time, the resource pattern of the first resource is the first resource pattern, such as the first bit and the second bit in the first configuration information are 11, which is used to indicate configuration 2, at this time, the resource pattern of the first resource is the resource pattern of 5G DMRS; such as the first bit and the second bit in the first configuration information are 00, which is used to indicate configuration 3, at this time, the resource pattern of the first resource is the resource pattern other than the first resource pattern and the resource pattern of 5G.

[0321] For another example, the first resource pattern corresponds to configuration 1, and the resource pattern other than the first resource pattern corresponds to configuration 4, for example, the resource pattern of 5G DMRS corresponds to configuration 4.

[0322] Optionally, the third information can carry a configuration identifier, which indicates the configuration 1 or the configuration 4. For example, the third bit in the first configuration information can be used to carry the configuration identifier. For example, when the third bit in the first configuration information is 0, the configuration 1 is indicated, and the resource pattern of the first resource is the first resource pattern. When the third bit in the first configuration information is 1, the configuration 4 is indicated, and the resource pattern of the first resource is a resource pattern other than the first resource pattern.

[0323] Optionally, the second device can send the third information through high-layer signaling, such as RRC signaling or MAC CE signaling. Alternatively, the second device can send the third information through physical layer signaling, such as DCI.

[0324] Optionally, the first device determines the resource pattern of the first resource according to a communication carrier where the first resource is located.

[0325] Compared with the method 1a, in the method 1b, the first device does not need to interact with other devices to determine the resource pattern of the first resource, thereby shortening the interaction delay of signaling and reducing the overhead of signaling.

[0326] Optionally, when the communication carrier is a shared carrier, the resource pattern of the first resource is the first resource pattern.

[0327] When the first carrier is a shared carrier, the first device needs to share the carrier with other devices. In this case, the first resource pattern is designed as the first resource pattern, which can make other devices avoid the first resource, i.e., not use the first resource or not map data on the first resource, thereby avoiding the interference of data transmission of other devices on the transmission of the first DMRS.

[0328] 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.

[0329] Optionally, part of the frequency band can be used as a shared carrier, for example, the 2.8Ghz or 3.5Ghz frequency band can be used as a shared carrier. When the communication carrier where the first resource is located is 2.8Ghz or 3.5Ghz, it is a shared carrier. In this case, 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 2.8Ghz or 3.5Ghz, it is an independent carrier. In this case, the first device can determine that the resource pattern of the first resource is not the first resource pattern.

[0330] Optionally, the present application can be applied to a scenario where the rank of data transmission is single-layer or multi-layer.

[0331] Optionally, the present application can be applied to a scenario where the rank of a channel matrix is 1 or greater than 1, that is, the present application can be applied to a scenario where 1 or more data is sent in parallel.

[0332] Optionally, the present application can be applied to a scenario where the number of antenna ports corresponding to a terminal device (such as a user) is 1 or more.

[0333] The first resource pattern in the present application is introduced as follows:

[0334] In a possible implementation, the first resource pattern in the present application has a correlation relationship with a resource pattern of NZP-CSI-RS or a resource pattern of ZP-CSI-RS, for example, the correlation relationship can include at least one of the following:

[0335] 1. The first resource pattern is one or more of the resource patterns of NZP-CSI-RS;

[0336] 2. The first resource pattern is one or more of the resource patterns of ZP-CSI-RS;

[0337] 3. The first resource occupies b subcarriers on a first symbol, and the distribution of the b subcarriers is the same as the distribution of c subcarriers occupied by NZP-CSI-RS resources on a second symbol or the interval between the subcarriers is the same, where b is greater than 0, b is a positive integer, c is greater than 0, c is a positive integer, and the first symbol and the second symbol are one symbol in the time domain; or,

[0338] 4. The first resource occupies d subcarriers on a third symbol, and the distribution of the d subcarriers is the same as the distribution of e subcarriers occupied by ZP-CSI-RS resources on a fourth symbol or the interval between the subcarriers is the same, where d is greater than 0, d is a positive integer, e is greater than 0, e is a positive integer, and the third symbol and the fourth symbol are one symbol in the time domain.

[0339] The above implementation can reduce the interference of other signals or channels on the 6G DMRS and improve the communication performance.

[0340] It should be noted that although the first resource pattern can be one or more of the resource patterns of NZP-CSI-RS, the present application does not limit the time domain position of the first resource to be the same as the time domain position of the NZP-CSI-RS resource, and the time domain position of the first resource can also be different from the time domain position of the NZP-CSI-RS resource.

[0341] Optionally, the resource pattern of the NZP-CSI-RS is a resource pattern of the 5G NZP-CSI-RS.

[0342] Optionally, the resource pattern of the ZP-CSI-RS is a resource pattern of the 5G ZP-CSI-RS.

[0343] For example, when the first device shares the frequency spectrum with the third device, and the communication carrier of the first DMRS is the shared carrier, and the first resource pattern is one or more of the resource patterns of the NZP-CSI-RS, the second device sends the third device the resource position of the ZP-CSI-RS, i.e., the resource position of the first resource, and the third device avoids the first resource, i.e., does not use the first resource, so as to reduce the interference of the data transmission of the third device on the transmission of the first DMRS, and at the same time, can use the resources of the control channel as much as possible for data transmission, so as to improve the resource utilization and the spectrum efficiency.

[0344] For example, in FIG. 4, 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 the 6G terminal device and the 5G terminal device. When the resource pattern of the DMRS resource of the 6G terminal device is one or more of the resource patterns of the NZP-CSI-RS, the access network device sends the 5G terminal device the ZP-CSI-RS resource position, so that the 5G terminal device performs rate matching on the DMRS of the 6G terminal device when transmitting data, i.e., does not use the DMRS resource of the 6G terminal device. Thus, the data transmission of the 5G terminal device does not interfere with the transmission of the 6G DMRS, and the MU spatial division multiplexing of the 5G UE and the 6G UE is realized, and the communication performance is improved.

[0345] 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.

[0346] 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 DMRS for the first device, and 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 for the second device for rate matching, the resource of the ZP CSI-RS is the same as the first resource of the first DMRS, or the resource of the ZP CSI-RS includes the first resource of the first DMRS, so as to avoid the interference of the data transmission of the 5G terminal device on the transmission of the 6G DMRS, realize the MU spatial division multiplexing of the 5G UE and the 6G UE, and improve the communication performance.

[0347] Optionally, the second device can periodically, semi-persistently or aperiodically send the ZP CSI-RS resource position.

[0348] Optionally, the ZP CSI-RS resource position can be the position of the first resource, or the position of the resource shared by the first device and the second device in the first resource.

[0349] From the above process, for the communication between the third device and the second device, the first resource can be a time-frequency resource not used.

[0350] For example, the third device does not map data for communication with the second device on the first resource by rate matching (or determines not to map data for communication with the second device on the first resource).

[0351] Please refer to FIG. 5, which takes 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 use the RB resource shown in FIG. 5. The dark gray color is the resource occupied by the DMRS of the PDSCH of the 5G terminal device, and the light gray color is the resource occupied by the DMRS of the PDSCH of the 6G terminal device. As shown in the lower right corner of FIG. 5, the 5G PDSCH cannot map data on the resource occupied by the 6G DMRS.

[0352] For another example, the third device can puncture (or delete, ignore, etc.) the bits carried by the first resource after mapping data on the first resource.

[0353] Optionally, the data transmission of the third device can rate match the first DMRS.

[0354] For example, the third device can rate match the first DMRS when transmitting PDSCH or PDCCH.

[0355] For another example, the third device can rate match the first DMRS when transmitting PUSCH or PUCCH.

[0356] The above introduces the first resource pattern as a whole, and the first resource pattern includes at least one or more of the first type pattern, the second type pattern or the third type pattern. The first type pattern, the second type pattern or the third type pattern will be introduced in detail below.

[0357] As mentioned above, from the frequency domain, 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.

[0358] 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 cases:

[0359] Case 1a: code division multiplexing exists in the frequency domain, and no code division multiplexing exists in the time domain. For example, 2 REs exist in the frequency domain for orthogonal cover code division multiplexing, and no orthogonal cover code division multiplexing exists in the time domain.

[0360] For case 1a, in one possible implementation, the second antenna port of the DMRS of the second type of pattern occupies 2 resource units in one symbol in the time domain and one frequency domain unit in the frequency domain.

[0361] Case 1b: code division multiplexing exists in the frequency domain, and code division multiplexing also exists in the time domain. For example, 2 REs exist in the frequency domain for orthogonal cover code division multiplexing, and 2 REs exist in the time domain for orthogonal cover code division multiplexing.

[0362] 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.

[0363] Optionally, as known from the above implementation, the DMRS of the first resource pattern occupies 1 resource unit, 2 resource units, 3 resource units, or 4 resource units in the fourth frequency domain unit of the fourth antenna port. When no orthogonal cover code division multiplexing exists in the time domain of the DMRS, the DMRS of the first resource pattern can occupy 1 resource unit, 2 resource units, or 3 resource units in the fourth frequency domain unit of the fourth antenna port, and when orthogonal cover code division multiplexing exists 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.

[0364] Optionally, the number of code division multiplexing groups corresponding to different cases (i.e., different types of first resource patterns) can be different, and can be at least one of the following implementation manners:

[0365] In one possible implementation, at most 4 code division multiplexing groups exist in the first frequency domain unit; and / or, at most 12 code division multiplexing groups exist in the second frequency domain unit; and / or, at most 12 code division multiplexing groups exist in the third frequency domain unit.

[0366] In the above implementation, multiple corresponding relationships between frequency domain units and code division multiplexing groups are provided, that is, multiple code division multiplexing schemes are designed. Therefore, one or more code division multiplexing schemes can be selected according to the needs of a terminal device (such as a user) or a current network environment, thereby improving communication performance.

[0367] Optionally, the first device and other devices (or other terminal devices / users) can transmit respective DMRSs through different DMRS CDM groups, and DMRSs of different DMRS CDM groups are usually located in the same symbol. Interference avoidance of DMRSs between users of NR MU scheduling is achieved by rate matching of the specific resource. For example, the specific resource can include a resource occupied by a DMRS code division multiplexing group without data transmission, and the resource is used for transmission of other DMRS CDM groups other than the DMRS CDM group used by the first device.

[0368] Optionally, when the DMRS includes h code division multiplexing groups on one frequency domain unit, there can be h terminal devices (such as users) multiplexing the frequency domain unit, where h is a positive integer. For example, when the first DMRS of the first pattern includes 4 code division multiplexing groups on the first frequency domain unit, there can be 4 terminal devices (such as users) multiplexing the first frequency domain unit.

[0369] For the number of code division multiplexing groups corresponding to the second type of pattern, there can be multiple cases, such as at least one of the following cases:

[0370] Case 2a: When the first DMRS is a single symbol, the second frequency domain unit of the DMRS of the second type of pattern includes at most 6 code division multiplexing groups.

[0371] In case 2a, the number of symbols occupied by the first DMRS is small, so the overhead caused by the first DMRS is small.

[0372] Optionally, the above "first DMRS is a single symbol" can be replaced by: a group of first DMRS resources occupies one symbol.

[0373] Case 2b: When the first DMRS is a double symbol, the second frequency domain unit of the DMRS of the second type of pattern includes at most 6 code division multiplexing groups or 12 code division multiplexing groups.

[0374] In case 2b, the first DMRS is a double symbol, so when channel estimation is performed through the first DMRS, the result of the channel estimation is more accurate, which can improve the communication performance.

[0375] Optionally, the above "first DMRS is a double symbol" can be replaced by: a group of first DMRS resources occupies two symbols.

[0376] Optionally, in case 2, when the DMRS of the second type of pattern is subjected to orthogonal cover code division multiplexing in the frequency domain with 2 REs and is not subjected to orthogonal cover 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 the DMRS of the second type of pattern is subjected to orthogonal cover code division multiplexing in the frequency domain with 2 REs and is subjected to orthogonal cover code division multiplexing in the time domain with 2 REs, the second frequency domain unit of the DMRS of the second type of pattern includes at most 6 code division multiplexing groups.

[0377] For ease of description, the second type of pattern corresponding to the first DMRS being a single symbol is referred to as a first pattern, the second type of pattern corresponding to the first DMRS being a double symbol and the DMRS of the second type of pattern being subjected to orthogonal cover code division multiplexing in the frequency domain with 2 REs and not being subjected to orthogonal cover code division multiplexing in the time domain is referred to as a second pattern, and the second type of pattern corresponding to the first DMRS being a double symbol and the DMRS of the second type of pattern being subjected to orthogonal cover code division multiplexing in the frequency domain with 2 REs and being subjected to orthogonal cover code division multiplexing in the time domain with 2 REs is referred to as a third pattern.

[0378] Optionally, the first device can determine the number of CDM groups in a plurality of optional manners, for example, at least one of the following manners can be included:

[0379] Manner 2a: The first device can determine the number of CDM groups occupied by the first DMRS in one frequency domain unit according to the type of the first resource pattern.

[0380] Optionally, there is an association relationship between the type of the first resource pattern and the number of CDM groups occupied by the first DMRS in one frequency domain unit, or the type of the first resource pattern and the number of CDM groups occupied by the first DMRS in one frequency domain unit are associated.

[0381] For example, the first device receives first information indicating that the first resource pattern is the first type of pattern, so that the first device can determine that the number of CDM groups occupied by the first DMRS in one frequency domain unit is one or more of 1-4.

[0382] In manner 2a, the first device can directly determine the number of CDM groups according to the type of the first resource pattern, without the need for signaling transmission related to the number of CDM groups, thereby saving signaling overhead.

[0383] Manner 2b: 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, or the number of CDM groups corresponding to the third frequency domain unit of the DMRS of the third type of pattern.

[0384] For example, the protocol can specify that the first frequency domain unit can include 2 or 4 CDM groups, or the protocol can specify that the second frequency domain unit can include 3 or 6 CDM groups, or the protocol can specify that the third frequency domain unit can include 6 or 12 CDM groups; for example, the second device can 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, or the number of CDM groups corresponding to the third frequency domain unit; or, the second device can 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.

[0385] In mode 2a, the first device does not need to determine the number of CDM groups by itself, saving the computing power consumed by the first device.

[0386] Optionally, the second device can send the second indication information or the second configuration information through high-layer signaling, such as RRC signaling, or MAC CE signaling; or the second device can send the second indication information or the second configuration information through physical layer signaling, such as DCI.

[0387] Optionally, the third information includes the second indication information or the second configuration information.

[0388] Optionally, the code division multiplexing groups corresponding to different cases (i.e., different types of first resource patterns) can be different, which can be the following examples:

[0389] As an example, the code division multiplexing groups included in the first frequency domain unit of the DMRS of the first type of pattern have multiple optional implementation manners, for example, the implementation manners include at least one or more of the following:

[0390] 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 shown in 6a-1 in FIG. 6a (such as CDM group 1a occupying subcarriers 0, 4, and 8 of the first frequency domain unit);

[0391] 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 shown in 6a-2 in FIG. 6a (such as CDM group 1b occupying subcarriers 1, 5, and 9 of the first frequency domain unit);

[0392] 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 shown as 6a-3 in FIG. 6a (such as CDM group 1c occupies subcarriers 2, 6, 10 of the first frequency domain unit);

[0393] 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 shown as 6a-4 in FIG. 6a (such as CDM group 1d occupies subcarriers 3, 7, 11 of the first frequency domain unit);

[0394] 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 6b-1 in FIG. 6b;

[0395] 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 6b-2 in FIG. 6b;

[0396] 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 6b-3 in FIG. 6b;

[0397] 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 6b-4 in FIG. 6b;

[0398] 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 6b-5 in FIG. 6b;

[0399] 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 6b-6 in FIG. 6b;

[0400] 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 6c-1 in FIG. 6c;

[0401] 12. The first frequency domain unit of the DMRS of the first 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 pattern can be 6c-2 in FIG. 6c;

[0402] 13. The first frequency domain unit of the DMRS of the first 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 pattern is shown as 6c-3 in FIG. 6c;

[0403] 14. The first frequency domain unit of the DMRS of the first 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 pattern is shown as 6c-4 in FIG. 6c; or,

[0404] 15. The first frequency domain unit of the DMRS of the first 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 pattern is shown as FIG. 6d.

[0405] Among them, the implementation mode 1 to the implementation mode 4 are examples that the first frequency domain unit of the DMRS of the first pattern includes 1 CDM group, these implementation modes can reduce the interference between different terminal devices (such as users).

[0406] Optionally, as described above, the first pattern of DMRS has at most 4 CDM groups on one frequency domain unit, for example, CDM group 1a, CDM group 1b, CDM group 1c and CDM group 1d in FIG. 6d. When the first pattern of DMRS has only one CDM group in one frequency domain unit, this CDM group can be any one of the four CDM groups, then there are four implementation modes, that is, the implementation mode 1 to the implementation mode 4.

[0407] Among them, the implementation mode 5 to the implementation mode 10 are examples that the first frequency domain unit of the DMRS of the first pattern includes 2 CDM groups, in these implementation modes, 1 frequency domain unit includes a smaller number of CDM groups, so when multiplexing the frequency domain units of the terminal devices (such as users) is implemented, the interference between different terminal devices (such as users) can be maintained at a lower level.

[0408] Optionally, as described above, the first pattern of DMRS has at most 4 CDM groups on one frequency domain unit. When the first pattern of DMRS has 2 CDM groups in one frequency domain unit, the two CDM groups can be any combination of the two CDM groups in the four CDM groups, then there are six implementation modes, that is, the implementation mode 5 to the implementation mode 10.

[0409] The implementation mode 11 to the implementation mode 14 are examples of 3 CDM groups in the first frequency domain unit of the DMRS of the first pattern, and 1 frequency domain unit in these implementation modes includes more CDM groups, so that the utilization of the frequency spectrum can be improved under the condition that the interference between different terminal devices (such as users) is maintained at a receivable level.

[0410] Optionally, as described above, the DMRS of the first pattern has at most 4 CDM groups on one frequency domain unit. When the DMRS of the first pattern has 3 CDM groups in one frequency domain unit, the 3 CDM groups can be any combination of 3 CDM groups in 4 CDM groups, and there are 4 implementation modes, that is, the implementation mode 11 to the implementation mode 14.

[0411] The implementation mode 15 is an example of 4 CDM groups in the first frequency domain unit of the DMRS of the first pattern, and 1 frequency domain unit in these implementation modes includes more CDM groups, so that the utilization of the frequency spectrum can be improved.

[0412] Optionally, the first code division multiplexing group includes at least one or more of the following: CDM group 1a, CDM group 1b, CDM group 1c, or CDM group 1d.

[0413] Optionally, different CDM groups correspond to different frequency domain positions.

[0414] For example, the CDM group 1b is offset by 1 subcarrier relative to the CDM group 1a as a whole, the CDM group 1c is offset by 1 subcarrier relative to the CDM group 1b as a whole, and the CDM group 1d is offset by 1 subcarrier relative to the CDM group 1c as a whole.

[0415] For example, the CDM group 1a in FIGS. 6a to 6d occupies subcarriers 0, 4, and 8 of the first frequency domain unit, the CDM group 1b occupies subcarriers 1, 5, and 9 of the first frequency domain unit, the CDM group 1c occupies subcarriers 2, 6, and 10 of the first frequency domain unit, or the CDM group 1d occupies subcarriers 3, 7, and 11 of the first frequency domain unit. The corresponding frequency domain positions of the CDM groups in FIGS. 6a to 6d are only examples, and the present application does not limit this.

[0416] Optionally, any two of the CDM group 1a, the CDM group 1b, the CDM group 1c, and the CDM group 1d correspond to different antenna ports.

[0417] Optionally, one code division multiplexing group included in the first frequency domain unit of the DMRS of the first pattern can correspond to one antenna port.

[0418] For example, the CDM group 1a in FIG. 6a to FIG. 6d corresponds to the antenna port port 0, the CDM group 1b corresponds to the antenna port port 1, the CDM group 1c corresponds to the antenna port port 2, and the CDM group 1d corresponds to the antenna port port 3. The antenna port number corresponding to the CDM group in FIG. 6a to FIG. 6d is only an example, and the present application does not limit this.

[0419] For example, the CDM group 1a corresponds to the antenna port port a1, the CDM group 1b corresponds to the antenna port port b1, the CDM group 1c corresponds to the antenna port port c1, or the CDM group 1d corresponds to the antenna port port d1. Wherein a1, b1, c1, d1 are integers greater than or equal to 0. Wherein a1, b1, c1, or d1 can be the same or different.

[0420] As an example, when the second type of pattern is the first pattern, there are multiple optional implementation manners for the code division multiplexing group included in the second frequency domain unit of the DMRS of the second type of pattern, for example, the implementation manners include at least one or more of the following:

[0421] 1. The CDM group 2a is included in the second frequency domain unit of the DMRS of the second type of pattern, for example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern is as shown in 7a-1 in FIG. 7a (such as the CDM group 2a occupies the subcarrier 0 and the subcarrier 1 of the second frequency domain unit);

[0422] 2. The CDM group 2b is included in the second frequency domain unit of the DMRS of the second type of pattern, for example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern is as shown in 7a-2 in FIG. 7a (such as the CDM group 2b occupies the subcarrier 2 and the subcarrier 3 of the second frequency domain unit);

[0423] 3. The CDM group 2c is included in the second frequency domain unit of the DMRS of the second type of pattern, for example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern is as shown in 7a-3 in FIG. 7a (such as the CDM group 2c occupies the subcarrier 4 and the subcarrier 5 of the second frequency domain unit);

[0424] 4. The CDM group 2b is included in the second frequency domain unit of the DMRS of the second type of pattern, for example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern is as shown in 7a-4 in FIG. 7a (such as the CDM group 2d occupies the subcarrier 6 and the subcarrier 7 of the second frequency domain unit);

[0425] 5. The CDM group 2e is included in the second frequency domain unit of the DMRS of the second type of pattern, for example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern is as shown in 7a-5 in FIG. 7a (such as the CDM group 2e occupies the subcarrier 8 and the subcarrier 9 of the second frequency domain unit);

[0426] 6. The second frequency domain unit of the DMRS of the second pattern includes CDM group 2f, for example, the resource pattern of the second frequency domain unit of the DMRS of the second pattern is shown as 7a-6 in FIG. 7a (such as CDM group 2f occupies subcarriers 10 and 11 of the second frequency domain unit);

[0427] 7. The second frequency domain unit of the DMRS of the second 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 pattern is shown as 7b-1 in FIG. 7b;

[0428] 8. The second frequency domain unit of the DMRS of the second pattern 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 pattern is shown as 7b-2 in FIG. 7b;

[0429] 9. The second frequency domain unit of the DMRS of the second 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 pattern is shown as 7b-3 in FIG. 7b;

[0430] 10. The second frequency domain unit of the DMRS of the second 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 pattern is shown as 7b-4 in FIG. 7b;

[0431] 11. The second frequency domain unit of the DMRS of the second pattern includes CDM group 2a and CDM group 2f, the resource pattern of the second frequency domain unit of the DMRS of the second pattern can be 7b-5 in FIG. 7b;

[0432] 12. The second frequency domain unit of the DMRS of the second pattern includes CDM group 2b and CDM group 2c, the resource pattern of the second frequency domain unit of the DMRS of the second pattern can be 7b-6 in FIG. 7b;

[0433] 13. The second frequency domain unit of the DMRS of the second 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 pattern can be 7b-7 in FIG. 7b;

[0434] 14. The second frequency domain unit of the DMRS of the second 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 pattern can be 7b-8 in FIG. 7b;

[0435] 15. The second frequency domain unit of the DMRS of the second type pattern comprises 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 pattern can be 7b-9 in FIG. 7b;

[0436] 16. The second frequency domain unit of the DMRS of the second type pattern comprises 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 pattern can be 7b-10 in FIG. 7b;

[0437] 17. The second frequency domain unit of the DMRS of the second type pattern comprises 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 pattern can be 7b-11 in FIG. 7b;

[0438] 18. The second frequency domain unit of the DMRS of the second type pattern comprises 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 pattern can be 7b-12 in FIG. 7b;

[0439] 19. The second frequency domain unit of the DMRS of the second type pattern comprises 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 pattern can be 7b-13 in FIG. 7b;

[0440] 20. The second frequency domain unit of the DMRS of the second type pattern comprises 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 pattern can be 7b-14 in FIG. 7b;

[0441] 21. The second frequency domain unit of the DMRS of the second type pattern comprises 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 pattern can be 7b-15 in FIG. 7b;

[0442] 22. The second frequency domain unit of the DMRS of the second type pattern comprises 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 pattern can be 7c-1 in FIG. 7c;

[0443] 23. The second frequency domain unit of the DMRS of the second type pattern comprises 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 pattern can be 7c-2 in FIG. 7c;

[0444] 24. The second frequency domain unit of the DMRS of the second 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 pattern can be 7c-3 in FIG. 7c;

[0445] 25. The second frequency domain unit of the DMRS of the second 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 pattern can be 7c-4 in FIG. 7c;

[0446] 26. The second frequency domain unit of the DMRS of the second 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 pattern can be 7c-5 in FIG. 7c;

[0447] 27. The second frequency domain unit of the DMRS of the second 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 pattern can be 7c-6 in FIG. 7c;

[0448] 28. The second frequency domain unit of the DMRS of the second 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 pattern can be 7c-7 in FIG. 7c;

[0449] 29. The second frequency domain unit of the DMRS of the second 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 pattern can be 7c-8 in FIG. 7c;

[0450] 30. The second frequency domain unit of the DMRS of the second 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 pattern can be 7c-9 in FIG. 7c;

[0451] 31. The second frequency domain unit of the DMRS of the second 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 pattern can be 7c-10 in FIG. 7c;

[0452] 32. The second frequency domain unit of the DMRS of the second 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 pattern can be 7c-11 in FIG. 7c;

[0453] 33. The second frequency domain unit of the DMRS of the second pattern comprises 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 pattern can be 7c-12 in FIG. 7c;

[0454] 34. The second frequency domain unit of the DMRS of the second pattern comprises 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 pattern can be 7c-13 in FIG. 7c;

[0455] 35. The second frequency domain unit of the DMRS of the second pattern comprises 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 pattern can be 7c-14 in FIG. 7c;

[0456] 36. The second frequency domain unit of the DMRS of the second pattern comprises 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 pattern can be 7c-15 in FIG. 7c;

[0457] 37. The second frequency domain unit of the DMRS of the second pattern comprises 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 pattern can be 7c-16 in FIG. 7c;

[0458] 38. The second frequency domain unit of the DMRS of the second pattern comprises 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 pattern can be 7c-17 in FIG. 7c;

[0459] 39. The second frequency domain unit of the DMRS of the second pattern comprises 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 pattern can be 7c-18 in FIG. 7c;

[0460] 40. The second frequency domain unit of the DMRS of the second pattern comprises 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 pattern can be 7c-19 in FIG. 7c;

[0461] 41. The second frequency domain unit of the DMRS of the second pattern comprises 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 pattern can be 7c-20 in FIG. 7c;

[0462] 42. The second frequency domain unit of the DMRS of the second type pattern comprises 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 pattern can be 7d-1 in FIG. 7d;

[0463] 43. The second frequency domain unit of the DMRS of the second type pattern comprises 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 pattern can be 7d-2 in FIG. 7d;

[0464] 44. The second frequency domain unit of the DMRS of the second type pattern comprises 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 pattern can be 7d-3 in FIG. 7d;

[0465] 45. The second frequency domain unit of the DMRS of the second type pattern comprises 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 pattern can be 7d-4 in FIG. 7d;

[0466] 46. The second frequency domain unit of the DMRS of the second type pattern comprises 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 pattern can be 7d-5 in FIG. 7d;

[0467] 47. The second frequency domain unit of the DMRS of the second type pattern comprises 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 pattern can be 7d-6 in FIG. 7d;

[0468] 48. The second frequency domain unit of the DMRS of the second type pattern comprises 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 pattern can be 7d-7 in FIG. 7d;

[0469] 49. The second frequency domain unit of the DMRS of the second type pattern comprises 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 pattern can be 7d-8 in FIG. 7d;

[0470] 50. The second frequency domain unit of the DMRS of the second 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 pattern can be 7d-9 in FIG. 7d;

[0471] 51. The second frequency domain unit of the DMRS of the second 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 pattern can be 7d-10 in FIG. 7d;

[0472] 52. The second frequency domain unit of the DMRS of the second 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 pattern can be 7d-11 in FIG. 7d;

[0473] 53. The second frequency domain unit of the DMRS of the second 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 pattern can be 7d-12 in FIG. 7d;

[0474] 54. The second frequency domain unit of the DMRS of the second 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 pattern can be 7d-13 in FIG. 7d;

[0475] 55. The second frequency domain unit of the DMRS of the second 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 pattern can be 7d-14 in FIG. 7d;

[0476] 56. The second frequency domain unit of the DMRS of the second 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 pattern can be 7d-15 in FIG. 7d;

[0477] 57. The second frequency domain unit of the DMRS of the second 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 pattern can be 7e-1 in FIG. 7e;

[0478] 58. The second frequency domain unit of the DMRS of the second 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 pattern can be 7e-2 in FIG. 7e.

[0479] 59. The second frequency domain unit of the DMRS of the second 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 pattern can be 7e-3 in FIG. 7e.

[0480] 60. The second frequency domain unit of the DMRS of the second 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 pattern can be 7e-4 in FIG. 7e.

[0481] 61. The second frequency domain unit of the DMRS of the second 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 pattern can be 7e-5 in FIG. 7e.

[0482] 62. The second frequency domain unit of the DMRS of the second 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 pattern can be 7e-6 in FIG. 7e.

[0483] 63. The second frequency domain unit of the DMRS of the second 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 pattern can be 7f in FIG. 7f.

[0484] Among them, the implementation mode 1 to the implementation mode 6 are examples of the second frequency domain unit of the DMRS of the second pattern including 1 CDM group, which can reduce the interference between different terminal devices (such as users).

[0485] Optionally, as described above, the second pattern of DMRS has at most 6 CDM groups on one frequency domain unit, for example, CDM group 2a, CDM group 2b, CDM group 2c, CDM group 2d, CDM group 2e, CDM group 2f in FIG. 7f. When the second pattern of DMRS has only one CDM group on one frequency domain unit, the CDM group can be any one of the 6 CDM groups, and there are 6 implementation modes, namely, the implementation mode 1 to the implementation mode 6.

[0486] Among them, the implementation modes 7 to 21 are examples of including 2 CDM groups in the second frequency domain unit of the DMRS of the second type of pattern, and in these implementation modes, 1 frequency domain unit includes a smaller number of CDM groups, so that while multiplexing the frequency domain units by terminal devices (such as users), the interference between different terminal devices (such as users) can be maintained at a lower level.

[0487] Optionally, as described above, the DMRS of the second type of pattern has at most 6 CDM groups on one frequency domain unit. When the DMRS of the second type of pattern has 2 CDM groups in one frequency domain unit, the 2 CDM groups can be any combination of 2 CDM groups in the 6 CDM groups, and there are 15 implementation modes, i.e., the implementation modes 7 to 21.

[0488] Among them, the implementation modes 22 to 41 are examples of including 3 CDM groups in the second frequency domain unit of the DMRS of the second type of pattern, and in these implementation modes, 1 frequency domain unit includes a larger number of CDM groups, so that the spectrum utilization can be improved under the condition that the interference between different terminal devices (such as users) is maintained at a receivable level.

[0489] Optionally, as described above, the DMRS of the second type of pattern has at most 6 CDM groups on one frequency domain unit. When the DMRS of the second type of pattern has 3 CDM groups in one frequency domain unit, the 3 CDM groups can be any combination of 3 CDM groups in the 6 CDM groups, and there are 20 implementation modes, i.e., the implementation modes 22 to 41.

[0490] Among them, the implementation modes 42 to 56 are examples of including 4 CDM groups in the second frequency domain unit of the DMRS of the second type of pattern, and in these implementation modes, 1 frequency domain unit includes a larger number of CDM groups, which can improve the spectrum utilization to a certain extent.

[0491] Optionally, as described above, the DMRS of the second type of pattern has at most 6 CDM groups on one frequency domain unit. When the DMRS of the second type of pattern has 4 CDM groups in one frequency domain unit, the 4 CDM groups can be any combination of 4 CDM groups in the 6 CDM groups, and there are 15 implementation modes, i.e., the implementation modes 42 to 56.

[0492] Among them, the implementation modes 57 to 62 are examples of including 5 CDM groups in the second frequency domain unit of the DMRS of the second type of pattern, and in these implementation modes, 1 frequency domain unit includes a larger number of CDM groups, which can improve the spectrum utilization.

[0493] Optionally, as described before, the DMRS of the second pattern has at most 6 CDM groups in one frequency domain unit. When the DMRS of the second pattern has 5 CDM groups in one frequency domain unit, the 4 CDM groups can be any combination of the 6 CDM groups, then there are 6 implementation manners, i.e., implementation manner 57 to implementation manner 62.

[0494] The implementation manner 63 is an example of the second frequency domain unit of the DMRS of the second pattern including 6 CDM groups, in which one frequency domain unit includes a large number of CDM groups, which can greatly improve the utilization of the frequency spectrum.

[0495] Optionally, the second code division multiplexing group 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.

[0496] Optionally, different CDM groups correspond to different frequency domain positions.

[0497] For example, the CDM group 2b is offset by 1 subcarrier from the CDM group 2a as a whole, the CDM group 2c is offset by 1 subcarrier from the CDM group 2b as a whole, the CDM group 2d is offset by 1 subcarrier from the CDM group 2c as a whole, the CDM group 2e is offset by 1 subcarrier from the CDM group 2d as a whole, and the CDM group 2f is offset by 1 subcarrier from the CDM group 2e as a whole.

[0498] For example, the CDM group 2a in FIGS. 7a-7f occupies subcarriers 0 and 1 of the second frequency domain resource unit, the CDM group 2b occupies subcarriers 2 and 3 of the second frequency domain resource unit, the CDM group 2c occupies subcarriers 4 and 5 of the second frequency domain resource unit, the CDM group 2d occupies subcarriers 6 and 7 of the second frequency domain resource unit, the CDM group 2e occupies subcarriers 8 and 9 of the second frequency domain resource unit, or the CDM group 2f occupies subcarriers 10 and 11 of the second frequency domain resource unit. The corresponding frequency domain positions of the CDM groups in FIGS. 7a-7f are only examples, which are not limited in the present application.

[0499] Optionally, any two of the CDM group 2a, the CDM group 2b, the CDM group 2c, the CDM group 2d, the CDM group 2e and the CDM group 2f correspond to different antenna ports.

[0500] Optionally, one code division multiplexing group included in the second frequency domain unit of the DMRS of the first pattern can correspond to one or two antenna ports.

[0501] For example, the CDM group 2a in FIG. 7a to FIG. 7f corresponds to the antenna port port 0 and / or port 1, the CDM group 2b corresponds to the antenna port port 2 and / or port 3, the CDM group 2c corresponds to the antenna port port 4 and / or port 5, the CDM group 2d corresponds to the antenna port port 6 and / or port 7, the CDM group 2e corresponds to the antenna port port 8 and / or port 9, and the CDM group 2f corresponds to the antenna port port 10 and / or port 11. The antenna port numbers corresponding to the CDM groups in FIG. 7a to FIG. 7f are only examples, and the present application is not limited thereto.

[0502] Optionally, the antenna ports corresponding to two CDM groups in the CDM group 2a, the CDM group 2b, the CDM group 2c, the CDM group 2d, the CDM group 2e, and the CDM group 2f can be the same.

[0503] For example, the CDM group 2a corresponds to the antenna port port a2 and / or port b2, the CDM group 2b corresponds to the antenna port port c2 and / or port d2, the CDM group 2c corresponds to the antenna port port e2 and / or port f2, the CDM group 2d corresponds to the antenna port port g2 and / or port h2, the CDM group 2e corresponds to the antenna port port i2 and / or port j2, or the CDM group 2f corresponds to the antenna port port k2 and / or port l2. Wherein a2, b2, c2, d2, e2, f2, g2, h2, i2, j2, k2, and l2 are integers greater than or equal to 0. Wherein a2, b2, c2, d2, e2, f2, g2, h2, i2, j2, k2, or l2 can be the same or different.

[0504] As an example, when the second type of pattern is the second pattern, the code division multiplexing groups included in the second frequency domain unit of the DMRS of the second type of pattern have multiple optional implementation manners, for example, the implementation manners include at least one or more of the following:

[0505] 1. The second frequency domain unit of the DMRS of the second type of pattern includes 12 CDM groups, for example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be FIG. 8, FIG. 8 is numbered in the order of time domain first and frequency domain second, or in the order of frequency domain first and time domain second, and the specific port numbering method is not limited by the present application.

[0506] 2. The second frequency domain unit of the DMRS of the second type of pattern includes 11 CDM groups, and optionally, the 11 CDM groups can be a combination of any 11 CDM groups in the CDM groups shown in FIG. 8, 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, CDM group 3k, 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, CDM group 3l, and the like.

[0507] 3. The second frequency domain unit of the DMRS of the second type of pattern includes 10, 9, 8, or 2 CDM groups, and optionally, the 10 CDM groups can be a combination of any 10 CDM groups in the CDM groups shown in FIG. 8; optionally, the 9 CDM groups can be a combination of any 9 CDM groups in the CDM groups shown in FIG. 8; optionally, the 8 CDM groups can be a combination of any 8 CDM groups in the CDM groups shown in FIG. 8; optionally, the 7 CDM groups can be a combination of any 7 CDM groups in the CDM groups shown in FIG. 8; optionally, the 6 CDM groups can be a combination of any 6 CDM groups in the CDM groups shown in FIG. 8; optionally, the 5 CDM groups can be a combination of any 5 CDM groups in the CDM groups shown in FIG. 8; optionally, the 4 CDM groups can be a combination of any 4 CDM groups in the CDM groups shown in FIG. 8; optionally, the 3 CDM groups can be a combination of any 3 CDM groups in the CDM groups shown in FIG. 8; optionally, the 2 CDM groups can be a combination of any 2 CDM groups in the CDM groups shown in FIG. 8.

[0508] 4. The second frequency domain unit of the DMRS of the second type of pattern includes 1 CDM group, and optionally, the 1 CDM group can be any 1 CDM group in the CDM groups shown in FIG. 8.

[0509] Optionally, the above-mentioned second code division multiplexing group 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.

[0510] Optionally, different CDM groups correspond to different frequency domain positions.

[0511] For example, the CDM group 3b is offset by 1 subcarrier from the CDM group 3a as a whole, the CDM group 3c is offset by 1 subcarrier from the CDM group 3b as a whole, the CDM group 3d is offset by 1 subcarrier from the CDM group 3c as a whole, and so on. The corresponding frequency domain positions of the CDM groups in FIG. 8 are only examples, which are not limited in the application.

[0512] Optionally, one or two antenna ports can be corresponding to one code division multiplexing (CDM) group included in the second frequency domain unit of the DMRS of the second pattern.

[0513] Optionally, the antenna ports corresponding to any two of the CDM group 3a, the CDM group 3b, the CDM group 3c, the CDM group 3d, the CDM group 3e, the CDM group 3f, the CDM group 3g, the CDM group 3h, the CDM group 3i, the CDM group 3j, the CDM group 3k and the CDM group 3l are different.

[0514] For example, the CDM group 3a in FIG. 8 corresponds to the antenna port port 0 and / or port 1, the CDM group 3b corresponds to the antenna port port 2 and / or port 3, the CDM group 3c corresponds to the antenna port port 4 and / or port 5, the CDM group 3d corresponds to the antenna port port 6 and / or port 7, the CDM group 3e corresponds to the antenna port port 8 and / or port 9, the CDM group 3f corresponds to the antenna port port 10 and / or port 11, the CDM group 3g corresponds to the antenna port port 12 and / or port 13, the CDM group 3h corresponds to the antenna port port 14 and / or port 15, the CDM group 3i corresponds to the antenna port port 16 and / or port 17, the CDM group 3g corresponds to the antenna port port 18 and / or port 19, the CDM group 3k corresponds to the antenna port port 20 and / or port 21, and the CDM group 3l corresponds to the antenna port port 22 and / or port 23. The antenna port numbers corresponding to the CDM groups in FIG. 8 are only examples, which are not limited in the application.

[0515] Optionally, the antenna ports corresponding to any two of the CDM group 3a, the CDM group 3b, the CDM group 3c, the CDM group 3d, the CDM group 3e, the CDM group 3f, the CDM group 3g, the CDM group 3h, the CDM group 3i, the CDM group 3j, the CDM group 3k and the CDM group 3l can be the same.

[0516] For example, CDM group 3a corresponds to antenna port port a3 and / or port b3, CDM group 3b corresponds to antenna port port c3 and / or port d3, CDM group 3c corresponds to antenna port port e3 and / or port f3, CDM group 3d corresponds to antenna port port g3 and / or port h3, CDM group 3e corresponds to antenna port port i3 and / or port j3, CDM group 3f corresponds to antenna port port k3 and / or port l3, CDM group 3g corresponds to antenna port port m3 and / or port n3, CDM group 3h corresponds to antenna port port o3 and / or port p3, CDM group 3i corresponds to antenna port port q3 and / or port r3, CDM group 3j corresponds to antenna port port s3 and / or port t3, CDM group 3k corresponds to antenna port port u3 and / or port v3, or CDM group 3l corresponds to antenna port port w3 and / or port x3. Wherein a3, b3, c3, d3, e3, f3, g3, h3, i3, j3, k3, l3, m3, n3, o3, p3, q3, r3, s3, t3, u3, v3, w3, x3 are integers greater than or equal to 0. Wherein a3, b3, c3, d3, e3, f3, g3, h3, i3, j3, k3, l3, m3, n3, o3, p3, q3, r3, s3, t3, u3, v3, w3, x3 can be the same or different.

[0517] As an example, when the second type of pattern is the third pattern, there are multiple optional implementation manners for the code division multiplexing groups included in the second frequency domain unit of the DMRS of the second type of pattern, for example, the implementation manners include at least one or more of the following:

[0518] 1. The second frequency domain unit of the DMRS of the second type of pattern includes 6 CDM groups, for example, the resource pattern of the second frequency domain unit of the DMRS of the second type of pattern can be Figure 9;

[0519] 2. The second frequency domain unit of the DMRS of the second type of pattern includes 5 CDM groups, optionally, the 5 CDM groups can be a combination of any 5 CDM groups shown in Figure 9, for example, a combination of CDM group 4a, CDM group 4b, CDM group 4c, CDM group 4d and CDM group 4e, for example, a combination of CDM group 4a, CDM group 4b, CDM group 4c, CDM group 4d, CDM group 4f, etc.

[0520] 3. The second frequency domain unit of the DMRS of the second type of pattern includes 4 CDM groups, and optionally, the 4 CDM groups can be any combination of 4 CDM groups shown in FIG. 9, for example, a combination of CDM group 4a, CDM group 4b, CDM group 4c and CDM group 4d, for example, a combination of CDM group 4a, CDM group 4b, CDM group 4c and CDM group 4f, etc.

[0521] 4. The second frequency domain unit of the DMRS of the second type of pattern includes 3 CDM groups, and optionally, the 3 CDM groups can be any combination of 3 CDM groups shown in FIG. 9, for example, a combination of CDM group 4a, CDM group 4b and CDM group 4c, for example, a combination of CDM group 4a, CDM group 4b and CDM group 4f, etc.

[0522] 5. The second frequency domain unit of the DMRS of the second type of pattern includes 2 CDM groups, and optionally, the 2 CDM groups can be any combination of 3 CDM groups shown in FIG. 9, for example, a combination of CDM group 4a and CDM group 4b, for example, a combination of CDM group 4b and CDM group 4f, etc.

[0523] 6. The second frequency domain unit of the DMRS of the second type of pattern includes 1 CDM group, and optionally, the 1 CDM group can be any one of the CDM groups shown in FIG. 9.

[0524] Optionally, the above-mentioned second code division multiplexing group 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.

[0525] Optionally, different CDM groups correspond to different frequency domain positions. For example, the whole CDM group 4a is offset by 1 subcarrier relative to the whole CDM group 4b, the whole CDM group 4c is offset by 1 subcarrier relative to the whole CDM group 4b, the whole CDM group 4d is offset by 1 subcarrier relative to the whole CDM group 4c, etc. The frequency domain positions corresponding to the CDM groups in FIG. 9 are only examples, which are not limited in the present application.

[0526] Optionally, the second frequency domain unit of the DMRS of the third type of pattern includes one code division multiplexing group, which can correspond to 1, 2, 3 or 4 antenna ports.

[0527] Optionally, any two of the CDM group 4a, CDM group 4b, CDM group 4c, CDM group 4d, CDM group 4e and CDM group 4f correspond to different antenna ports.

[0528] For example, the CDM group 4a in FIG. 9 corresponds to the antenna ports port 0, port 1, port 2 and / or port 3, the CDM group 4b corresponds to the antenna ports port 4, port 5, port 6 and / or port 7, the CDM group 4c corresponds to the antenna ports port 8, port 9, port 10 and / or port 11, the CDM group 4d corresponds to the antenna ports port 12, port 13, port 14 and / or port 15, the CDM group 4e corresponds to the antenna ports port 16, port 17, port 18 and / or port 19, and the CDM group 4f corresponds to the antenna ports port 20, port 21, port 22 and / or port 24. The antenna port numbers corresponding to the CDM groups in FIG. 9 are only examples, and the present application is not limited in this regard.

[0529] Optionally, the antenna ports corresponding to two CDM groups in the CDM group 4a, the CDM group 4b, the CDM group 4c, the CDM group 4d, the CDM group 4e and the CDM group 4f can be the same.

[0530] For example, the CDM group 4a corresponds to the antenna ports port a4, port b4, port c4 and / or port d4, the CDM group 4b corresponds to the antenna ports port e4, port f4, port g4 and / or port h4, the CDM group 4c corresponds to the antenna ports port i4, port j4, port k4 or port l4, the CDM group 4d corresponds to the antenna ports port m4, port n4, port o4 and / or port p4, the CDM group 4e corresponds to the antenna ports port q4, port r4, port s4 and / or port t4, and the CDM group 4f corresponds to the antenna ports port u4, port v4, port w4 and / or port 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, x4 are integers greater than or equal to 0. The integers a4, b4, c4, d4, e4, f4, g4, h4, i4, j4, k4, l4, m4, n4, o4, p4, q4, r4, s4, t4, u4, v4, w4, x4 can be the same or different.

[0531] As an example, the code division multiplexing groups included in the third frequency domain unit of the DMRS of the third type of pattern exist in a variety of optional implementation manners, for example, the implementation manners include at least one or more of the following:

[0532] 1. The third frequency domain unit of the DMRS of the third type pattern includes 12 CDM groups, for example, the resource pattern of the third frequency domain unit of the DMRS of the third type pattern can be as shown in FIG. 10a;

[0533] 2. The third frequency domain unit of the DMRS of the third type pattern includes 11 CDM groups, optionally, the 11 CDM groups can be a combination of any 11 CDM groups shown in FIG. 10a, for example, in 10b-1 of FIG. 10b, the 11 CDM groups can be a combination 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, for example, in 10b-2 of FIG. 10b, the 11 CDM groups can be a combination 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, for example, in 10b-12 of FIG. 10b, the 11 CDM groups can be a combination 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;

[0534] 3. The third frequency domain unit of the DMRS of the third type pattern includes 10, 9, 8... or 3 CDM groups, optionally, the 10 CDM groups can be a combination of any 10 CDM groups shown in FIG. 10a, optionally, the 9 CDM groups can be a combination of any 9 CDM groups shown in FIG. 10a, optionally, the 8 CDM groups can be a combination of any 8 CDM groups shown in FIG. 10a, optionally, the 7 CDM groups can be a combination of any 7 CDM groups shown in FIG. 10a, optionally, the 6 CDM groups can be a combination of any 6 CDM groups shown in FIG. 10a, optionally, the 5 CDM groups can be a combination of any 5 CDM groups shown in FIG. 10a, optionally, the 4 CDM groups can be a combination of any 4 CDM groups shown in FIG. 10a, optionally, the 3 CDM groups can be a combination of any 3 CDM groups shown in FIG. 10a;

[0535] 4. The third frequency domain unit of the DMRS of the third type of pattern includes 2 CDM groups, and optionally, the 2 CDM groups can be a combination of any 2 CDM groups in the CDM groups shown in FIG. 10a. For example, in FIG. 10c, 10c-1, the 2 CDM groups can be a combination of CDM group 5a and CDM group 5b, and in FIG. 10c, 10c-2, the 2 CDM groups can be a combination of CDM group 5a and CDM group 5c; in FIG. 10c, 10c-n, the 2 CDM groups can be a combination of CDM group 5k and CDM group 5l; or,

[0536] 5. The third frequency domain unit of the DMRS of the third type of pattern includes 1 CDM group, and optionally, the 1 CDM group can be a combination of any 1 CDM group in the CDM groups shown in FIG. 10a. For example, in FIG. 10d, 10d-1, the 1 CDM group can be CDM group 5a, and in FIG. 10d, 10d-2, the 1 CDM group can be CDM group 5b; in FIG. 10d, 10d-12, the 1 CDM group can be CDM group 5l.

[0537] Optionally, the 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.

[0538] Optionally, different CDM groups correspond to different frequency domain locations.

[0539] For example, CDM group 5b is offset by 1 subcarrier relative to CDM group 5a as a whole, CDM group 5c is offset by 1 subcarrier relative to CDM group 5b as a whole, CDM group 5d is offset by 1 subcarrier relative to CDM group 5c as a whole, and so on.

[0540] For example, the CDM group 5a in FIG. 10a to FIG. 10d occupies the subcarrier 0 of the third frequency domain resource unit, the CDM group 5b occupies the subcarrier 1 of the third frequency domain resource unit, the CDM group 5c occupies the subcarrier 2 of the third frequency domain resource unit, the CDM group 5d occupies the subcarrier 3 of the third frequency domain resource unit, the CDM group 5e occupies the subcarrier 4 of the third frequency domain resource unit, the CDM group 5f occupies the subcarrier 5 of the third frequency domain resource unit, the CDM group 5g occupies the subcarrier 6 of the third frequency domain resource unit, the CDM group 5h occupies the subcarrier 7 of the third frequency domain resource unit, the CDM group 5i occupies the subcarrier 8 of the third frequency domain resource unit, the CDM group 5j occupies the subcarrier 9 of the third frequency domain resource unit, the CDM group 5k occupies the subcarrier 10 of the third frequency domain resource unit, or the CDM group 5l occupies the subcarrier 11 of the third frequency domain resource unit. The corresponding frequency domain positions of the CDM groups in FIG. 10a to FIG. 10d are only examples, which are not limited in the present application.

[0541] Optionally, one code division multiplexing group included in the third frequency domain unit of the DMRS of the third type of pattern can correspond to one antenna port.

[0542] Optionally, the antenna ports corresponding to any two of the CDM group 5a, the CDM group 5b, the CDM group 5c, the CDM group 5d, the CDM group 5e, the CDM group 5f, the CDM group 5g, the CDM group 5h, the CDM group 5i, the CDM group 5j, the CDM group 5k and the CDM group 5l are different.

[0543] For example, the CDM group 5a in FIG. 10a to FIG. 10d corresponds to the antenna port port 0, the CDM group 5b corresponds to the antenna port port 1, the CDM group 5c corresponds to the antenna port port 2, the CDM group 5d corresponds to the antenna port port 3, the CDM group 5e corresponds to the antenna port port 4, the CDM group 5f corresponds to the antenna port port 5, the CDM group 5g corresponds to the antenna port port 6, the CDM group 5h corresponds to the antenna port port 7, the CDM group 5i corresponds to the antenna port port 8, the CDM group 5j corresponds to the antenna port port 9, the CDM group 5k corresponds to the antenna port port 10, or the CDM group 5l corresponds to the antenna port port 11. The corresponding antenna port numbers of the CDM groups in FIG. 10a to FIG. 10d are only examples, which are not limited in the present application.

[0544] Optionally, the antenna ports corresponding to two of the CDM group 5a, the CDM group 5b, the CDM group 5c, the CDM group 5d, the CDM group 5e, the CDM group 5f, the CDM group 5g, the CDM group 5h, the CDM group 5i, the CDM group 5j, the CDM group 5k and the CDM group 5l can be the same.

[0545] For example, the CDM group 5a corresponds to the antenna port port a5, the CDM group 5b corresponds to the antenna port port b5, the CDM group 5c corresponds to the antenna port port c5, the CDM group 5d corresponds to the antenna port port d5, the CDM group 5e corresponds to the antenna port port e5, the CDM group 5f corresponds to the antenna port port f5, the CDM group 5g corresponds to the antenna port port g5, the CDM group 5h corresponds to the antenna port port h5, the CDM group 5i corresponds to the antenna port port i5, the CDM group 5j corresponds to the antenna port port j5, the CDM group 5k corresponds to the antenna port port k5, or the CDM group 5l corresponds to the antenna port port l5. Wherein, a5, b5, c5, d5, e5, f5, g5, h5, i5, j5, k5, or l5 is an integer greater than or equal to 0. Wherein, a5, b5, c5, d5, e5, f5, g5, h5, i5, j5, k5, or l5 can be the same or different.

[0546] Optionally, the first device and / or the second device can determine the frequency domain position of the DMRS according to the type of the first resource pattern.

[0547] Optionally, the first device and / or the second device can determine the frequency domain position occupied by the code division multiplexing group of the DMRS according to the type of the first resource pattern.

[0548] Optionally, the frequency domain positions corresponding to different cases (i.e. different types of first resource patterns) can be different, and can be the following implementation manners:

[0549] In a possible implementation manner, the first code division multiplexing group of the DMRS of the first type of pattern occupies subcarriers k1, k1+4 and k1+8 in the first frequency domain unit, wherein k1≥0, k1 is an integer; and / or the second code division multiplexing group of the DMRS of the second type of pattern occupies subcarriers k2 and k2+1 in the second frequency domain unit, wherein k2=2N, N≥0, N is an integer; and / or the third code division multiplexing group of the DMRS of the third type of pattern occupies subcarrier k3 in the third frequency domain unit, wherein k3≥0, k3 is an integer.

[0550] Based on the above implementation manner, the intervals of the subcarriers corresponding to different patterns are different, i.e. the frequency domain positions are different. On the one hand, the present application provides diversified frequency domain position design schemes, thereby improving the flexibility of the frequency domain position, and on the other hand, the intervals between the subcarriers in the above implementation manner are the same as the intervals between the subcarriers of the resource of the NZP-CSI-RS defined by the protocol, so that the rate matching of the DMRS can be implemented without changing the protocol, thereby improving the communication performance.

[0551] Optionally, the first code division multiplexing group of the DMRS of the first type of pattern comprises a first subcarrier, a second subcarrier and a third subcarrier, wherein the first subcarrier and the second subcarrier are spaced apart by 4 subcarriers, and the second subcarrier and the third subcarrier are spaced apart by 4 subcarriers; and the first code division multiplexing group of the DMRS of the third type of pattern comprises the first subcarrier and the second subcarrier, wherein the first subcarrier and the second subcarrier are spaced apart by 1 subcarrier.

[0552] Optionally, k1 comprises at least one of 0, 1 or 2; k2 comprises at least one of 0, 1, 2, 3, 4 or 5; and k3 comprises at least one of 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12.

[0553] Optionally, the value of k1 corresponds to the index of the subcarrier of the DMRS of the first type of pattern, the value of k2 corresponds to the index of the subcarrier of the DMRS of the second type of pattern, and / or the value of k3 corresponds to the index of the subcarrier of the DMRS of the third type of pattern. For example, the correspondence can be at least one of the rows in Table 5:

[0554] Table 5

[0555] In Table 5, k represents the subcarrier occupied by the DMRS, k = 0 represents that the DMRS occupies the subcarrier 0, k = 1 represents that the DMRS occupies the subcarrier 1, and so on, and k = 11 represents that the DMRS occupies the subcarrier 11.

[0556] In addition to the above correspondence, there are other correspondences in the present application:

[0557] In an optional implementation, there is an association relationship 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 position of the first DMRS.

[0558] Optionally, the first device and / or the second device can determine the association relationship between at least two of the antenna port occupied by the DMRS, the code division multiplexing group number of the DMRS and the frequency domain position of the DMRS according to the type of the first resource pattern.

[0559] Based on the above implementation, since there is an association relationship between the above at least two, another one can be determined based on the above at least two, 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, which can help the first device to 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.

[0560] Optionally, the first device and / or the second device can determine the correspondence between the antenna port and the code division multiplexing group number of the DMRS according to the type of the first resource pattern.

[0561] Optionally, the correspondence between the antenna port and the code division multiplexing group number can be different in different cases. For example, see the following examples:

[0562] For example, referring to FIGS. 6a-6d, the correspondence between the CDM group and the antenna port of the DMRS of the first type of pattern on the first frequency domain unit includes at least one or more of the following:

[0563] 1. CDM group 1a corresponds to port 0;

[0564] 2. CDM group 1b corresponds to port 1;

[0565] 3. CDM group 1c corresponds to port 2; or

[0566] 4. CDM group 1d corresponds to port 3.

[0567] For example, referring to FIGS. 7a-7e, when the second type of pattern is the first pattern, the correspondence between the CDM group and the antenna port of the DMRS of the second type of pattern on the second frequency domain unit includes at least one or more of the following:

[0568] 1. CDM group 2a corresponds to port 0, port 1;

[0569] 2. CDM group 2b corresponds to port 2, port 3;

[0570] 3. CDM group 2c corresponds to port 4, port 5;

[0571] 4. CDM group 2d corresponds to port 6, port 7;

[0572] 5. CDM group 2e corresponds to port 8, port 9; or

[0573] 6. CDM group 2f corresponds to port 10, port 11.

[0574] For example, referring to FIG. 8, when the second type of pattern is the second pattern, the correspondence between the CDM group and the antenna port of the DMRS of the second type of pattern on the second frequency domain unit includes at least one or more of the following:

[0575] 1. CDM group 3a corresponds to port 0, port 1;

[0576] 2. CDM group 3b corresponds to port 2, port 3;

[0577] 3. CDM group 3c corresponds to port4, port5;

[0578] 4. CDM group 3d corresponds to port6, port7;

[0579] 5. CDM group 3e corresponds to port8, Por9;

[0580] 6. CDM group 3f corresponds to port10, port11;

[0581] 7. CDM group 3g corresponds to port12, port13;

[0582] 8. CDM group 3h corresponds to port14, port15;

[0583] 9. CDM group 3i corresponds to port16, port17;

[0584] 10. CDM group 3j corresponds to port18, port19;

[0585] 11. CDM group 3k corresponds to port20, Por21; or,

[0586] 12. CDM group 3l corresponds to port22, port23.

[0587] For example, please refer to FIG. 9, when the second type of pattern is the third pattern, the correspondence between the CDM groups and the antenna ports of the DMRS of the second type of pattern on the second frequency domain unit includes at least one or more of the following:

[0588] 1. CDM group 4a corresponds to port0, port1, port2, port3;

[0589] 2. CDM group 4b corresponds to port4, port5, port6, port7;

[0590] 3. CDM group 4c corresponds to port8, port9, port10, port11;

[0591] 4. CDM group 4d corresponds to port12, port13, port14, port15;

[0592] 5. CDM group 4e corresponds to port16, port17, port18, port19; or,

[0593] 6. CDM group 4f corresponds to port20, Por21, port22, port23.

[0594] 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 in the third type of pattern includes at least one or more of the following:

[0595] 1. CDM group 5a corresponds to port 0;

[0596] 2. CDM group 5b corresponds to port1;

[0597] 3. CDM group 5c corresponds to port 2;

[0598] 4. CDM group 5d corresponds to port 3;

[0599] 5. CDM group 5e corresponds to port 4;

[0600] 6. CDM group 5f corresponds to port 5;

[0601] 7. CDM group 5g corresponds to port 6;

[0602] 8. CDM group 5h corresponds to port 7;

[0603] 9. CDM group 5i corresponds to port 8;

[0604] 10. CDM group 5j corresponds to port 9;

[0605] 11. CDM group 5k corresponds to port 10; or,

[0606] 12. CDM group 5l corresponds to port 11.

[0607] 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.

[0608] 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:

[0609] For example, referring to Figures 6a-6d, the correspondence between the antenna ports and frequency domain locations of the DMRS in the first type of pattern includes at least one or more of the following:

[0610] 1. port0 corresponds to subcarrier 0, subcarrier 4, and subcarrier 8 on the first frequency domain unit;

[0611] 2. port1 corresponds to subcarrier 1, subcarrier 5, and subcarrier 9 on the first frequency domain unit;

[0612] 3. port2 corresponds to subcarriers 2, 6, and 10 in the first frequency domain unit; or,

[0613] 4. port3 corresponds to subcarrier 3, subcarrier 7, subcarrier 11 on the first frequency domain unit.

[0614] For another example, referring to FIG. 7a-7e, when the second type of pattern is the first pattern, the correspondence between the antenna port and the frequency domain location of the DMRS of the second type of pattern includes at least one or more of the following:

[0615] 1. port0, port1 correspond to subcarrier 0, subcarrier 1 on the second frequency domain unit;

[0616] 2. port2, port3 correspond to subcarrier 2, subcarrier 3 on the second frequency domain unit;

[0617] 3. port4, port5 correspond to subcarrier 4, subcarrier 5 on the second frequency domain unit;

[0618] 4. port6, port7 correspond to subcarrier 6, subcarrier 7 on the second frequency domain unit;

[0619] 5. port8, port9 correspond to subcarrier 8, subcarrier 9 on the second frequency domain unit; or

[0620] 6. port10, port11 correspond to subcarrier 10, subcarrier 11 on the second frequency domain unit.

[0621] For another example, referring to FIG. 8, when the second type of pattern is the second pattern, the correspondence between the antenna port and the frequency domain location of the DMRS of the second type of pattern includes at least one or more of the following:

[0622] 1. port0, port1 correspond to the first symbol, subcarrier 0, subcarrier 1 on the second frequency domain unit;

[0623] 2. port2, port3 correspond to the first symbol, subcarrier 2, subcarrier 3 on the second frequency domain unit;

[0624] 3. port4, port5 correspond to the first symbol, subcarrier 4, subcarrier 5 on the second frequency domain unit;

[0625] 4. port6, port7 correspond to the first symbol, subcarrier 6, subcarrier 7 on the second frequency domain unit;

[0626] 5. port8, port9 correspond to the first symbol, subcarrier 8, subcarrier 9 on the second frequency domain unit;

[0627] 6. port10, port11 correspond to the first symbol, subcarrier 10, subcarrier 11 on the second frequency domain unit.

[0628] 7. port12, port13 correspond to the second symbol, subcarrier 0, subcarrier 1 on the second frequency domain unit;

[0629] 8. port14, port15 correspond to the second symbol, subcarrier 2, subcarrier 3 on the second frequency domain unit;

[0630] 9. port16, port17 correspond to the second symbol, subcarrier 4, subcarrier 5 on the second frequency domain unit;

[0631] 10. port18, port19 correspond to the second symbol, subcarrier 6, subcarrier 7 on the second frequency domain unit;

[0632] 11. port20, port21 correspond to the second symbol, subcarrier 8, subcarrier 9 on the second frequency domain unit; or,

[0633] 12. port22, port23 correspond to the second symbol, subcarrier 10, subcarrier 11 on the second frequency domain unit.

[0634] For another example, please refer to FIG. 9, when the second type of pattern is the third 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:

[0635] 1. port0, port1, port2, port3 correspond to subcarrier 0, subcarrier 1 on the second frequency domain unit;

[0636] 2. port4, port5, port6, port7 correspond to subcarrier 2, subcarrier 3 on the second frequency domain unit;

[0637] 3. port8, port9, port10, port11 correspond to subcarrier 4, subcarrier 5 on the second frequency domain unit;

[0638] 4. port12, port13, port14, port15 correspond to subcarrier 6, subcarrier 7 on the second frequency domain unit;

[0639] 5. port16, port17, port18, port19 correspond to subcarrier 8, subcarrier 9 on the second frequency domain unit; or,

[0640] 6. port20, port21, port22, port23 correspond to subcarrier 10, subcarrier 11 on the second frequency domain unit.

[0641] For another example, please refer to FIG. 10a-10d, the correspondence between the antenna port and the frequency domain position of the DMRS of the third type of pattern includes at least one or more of the following:

[0642] 1. port0 corresponds to subcarrier 0 on the third frequency domain unit;

[0643] 2. port1 corresponds to subcarrier 1 on the third frequency domain unit;

[0644] 3. port2 corresponds to subcarrier 2 on the third frequency domain unit;

[0645] 4. port3 corresponds to subcarrier 3 on the third frequency domain unit;

[0646] 5. port4 corresponds to subcarrier 4 on the third frequency domain unit;

[0647] 6. port5 corresponds to subcarrier 5 on the third frequency domain unit;

[0648] 7. port6 corresponds to subcarrier 6 on the third frequency domain unit;

[0649] 8. port7 corresponds to subcarrier 7 on the third frequency domain unit;

[0650] 9. port8 corresponds to subcarrier 8 on the third frequency domain unit;

[0651] 10. port9 corresponds to subcarrier 9 on the third frequency domain unit;

[0652] 11. port10 corresponds to subcarrier 10 on the third frequency domain unit; or,

[0653] 12. port11 corresponds to subcarrier 11 on the third frequency domain unit.

[0654] Optionally, the first device and / or the second device can determine the correspondence between the code division multiplexing group number of the DMRS and the frequency domain position of the DMRS according to the type of the first resource pattern.

[0655] Optionally, the correspondence between the code division multiplexing group number and the frequency domain position of the first DMRS is different in different cases, which can be seen from the following examples:

[0656] For example, referring to FIGS. 6a-6d, the correspondence between the CDM group and the antenna port of the DMRS of the first type of pattern on the first frequency domain unit includes at least one or more of the following:

[0657] 1. CDM group 1a corresponds to subcarrier 0, subcarrier 4, subcarrier 8 on the first frequency domain unit;

[0658] 2. CDM group 1b corresponds to subcarrier 1, subcarrier 5, subcarrier 9 on the first frequency domain unit;

[0659] 3. CDM group 1c corresponds to subcarrier 2, subcarrier 6, subcarrier 10 on the first frequency domain unit; or,

[0660] 4. CDM group 1d corresponds to subcarrier 3, subcarrier 7, subcarrier 11 on the first frequency domain unit.

[0661] For another example, please refer to FIG. 7a-7e, when the second type of pattern is the first pattern, the correspondence between the CDM groups on the second frequency domain unit of the DMRS of the second type of pattern and the antenna ports includes at least one or more of the following:

[0662] 1. CDM group 2a corresponds to subcarrier 0, subcarrier 1 on the second frequency domain unit;

[0663] 2. CDM group 2b corresponds to subcarrier 2, subcarrier 3 on the second frequency domain unit;

[0664] 3. CDM group 2c corresponds to subcarrier 4, subcarrier 5 on the second frequency domain unit;

[0665] 4. CDM group 2d corresponds to subcarrier 6, subcarrier 7 on the second frequency domain unit;

[0666] 5. CDM group 2e corresponds to subcarrier 8, subcarrier 9 on the second frequency domain unit; or

[0667] 6. CDM group 2f corresponds to subcarrier 10, subcarrier 11 on the second frequency domain unit.

[0668] For another example, please refer to FIG. 8, when the second type of pattern is the second pattern, the correspondence between the CDM groups on the second frequency domain unit of the DMRS of the second type of pattern and the antenna ports includes at least one or more of the following:

[0669] 1. CDM group 3a corresponds to subcarrier 0, subcarrier 1 on the second frequency domain unit in the first symbol;

[0670] 2. CDM group 3b corresponds to subcarrier 2, subcarrier 3 on the second frequency domain unit in the first symbol;

[0671] 3. CDM group 3c corresponds to subcarrier 4, subcarrier 5 on the second frequency domain unit in the first symbol;

[0672] 4. CDM group 3d corresponds to subcarrier 6, subcarrier 7 on the second frequency domain unit in the first symbol;

[0673] 5. CDM group 3e corresponds to subcarrier 8, subcarrier 9 on the second frequency domain unit in the first symbol;

[0674] 6. CDM group 3f corresponds to subcarrier 10, subcarrier 11 on the second frequency domain unit in the first symbol;

[0675] 7. CDM group 3g corresponds to subcarrier 0, subcarrier 1 on the second frequency domain unit in the second symbol;

[0676] 8. CDM group 3h corresponds to the second symbol, subcarrier 2 on the second frequency domain unit, subcarrier 3 on the second frequency domain unit;

[0677] 9. CDM group 3i corresponds to the second symbol, subcarrier 4 on the second frequency domain unit, subcarrier 5 on the second frequency domain unit;

[0678] 10. CDM group 3j corresponds to the second symbol, subcarrier 6 on the second frequency domain unit, subcarrier 7 on the second frequency domain unit; or,

[0679] 11. CDM group 3k corresponds to the second symbol, subcarrier 10 on the second frequency domain unit, subcarrier 11 on the second frequency domain unit.

[0680] For another example, please refer to FIG. 9, when the second type of pattern is the third pattern, for example, there are 2 REs for orthogonal cover code division multiplexing in the frequency domain, and there are 2 REs for orthogonal cover code division multiplexing in the time domain, 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:

[0681] 1. CDM group 4a corresponds to subcarrier 0 on the second frequency domain unit, subcarrier 1 on the second frequency domain unit;

[0682] 2. CDM group 4b corresponds to subcarrier 2 on the second frequency domain unit, subcarrier 3 on the second frequency domain unit;

[0683] 3. CDM group 4c corresponds to subcarrier 4 on the second frequency domain unit, subcarrier 5 on the second frequency domain unit;

[0684] 4. CDM group 4d corresponds to subcarrier 6 on the second frequency domain unit, subcarrier 7 on the second frequency domain unit;

[0685] 5. CDM group 4e corresponds to subcarrier 8 on the second frequency domain unit, subcarrier 9 on the second frequency domain unit; or,

[0686] 6. CDM group 4f corresponds to subcarrier 10 on the second frequency domain unit, subcarrier 11 on the second frequency domain unit.

[0687] For another example, please refer to FIG. 10a-10d, the correspondence between the CDM group on the third frequency domain unit of the DMRS of the third type of pattern and the antenna port includes at least one or more of the following:

[0688] 1. CDM group 5a corresponds to subcarrier 0 on the third frequency domain unit;

[0689] 2. CDM group 5b corresponds to subcarrier 1 on the third frequency domain unit;

[0690] 3. CDM group 5c corresponds to subcarrier 2 on the third frequency domain unit;

[0691] 4. CDM group 5d corresponds to subcarrier 3 on the third frequency domain unit

[0692] 5. The CDM group 5e corresponds to subcarrier 4 on the third frequency domain unit;

[0693] 6. The CDM group 5f corresponds to subcarrier 5 on the third frequency domain unit;

[0694] 7. The CDM group 5g corresponds to subcarrier 6 on the third frequency domain unit;

[0695] 8. The CDM group 5h corresponds to subcarrier 7 on the third frequency domain unit;

[0696] 9. The CDM group 5i corresponds to subcarrier 8 on the third frequency domain unit;

[0697] 10. The CDM group 5j corresponds to subcarrier 9 on the third frequency domain unit;

[0698] 11. The CDM group 5k corresponds to subcarrier 10 on the third frequency domain unit; or,

[0699] 12. The CDM group 5l corresponds to subcarrier 11 on the third frequency domain unit.

[0700] Optionally, the first device needs to determine the type of the first resource pattern, i.e., whether the first resource pattern is the first type of pattern, the second type of pattern, or the third type of pattern. The first device can determine the type of the first resource pattern through the following implementation manners:

[0701] In a possible implementation manner, the second device sends first information to the first device, where the first information is used to indicate whether the first resource pattern is the first type of pattern, the second type of pattern, or the third type of pattern, and the first device receives the first information.

[0702] In the implementation manners above, the first device can determine the type of the first resource pattern according to the first information, and then 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 flexibly determine the type of the first resource pattern, meet different communication requirements, and improve communication performance.

[0703] Optionally, the first information can be an identifier of the first type of pattern, an identifier of the second type of pattern, or an identifier of the third type of pattern. For example, the first information can be an index of the first type of pattern, an index of the second type of pattern, or an index of the third type of pattern, or two bits in the first information are used to indicate whether the first resource pattern is the first type of pattern, the second type of pattern, or the third type of pattern. For example, when the two bits are 00, it indicates that the first resource pattern is the first type of pattern; for example, when the two bits are 01, it indicates that the first resource pattern is the second type of pattern; for example, when the two bits are 10, it indicates that the first resource pattern is the third type of pattern.

[0704] Optionally, the second device can send the first information through high layer signaling, such as RRC signaling or MAC CE signaling; or the second device can send the first information through physical layer signaling, such as DCI.

[0705] Optionally, the third information includes the first information, or the third information can be sent simultaneously with the first information, or the third information can be sent first and then the first information, or the first information can be sent first and then the third information.

[0706] In a possible implementation, the second device sends 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, the number of code division multiplexing groups of the first DMRS, or the frequency domain position of the first DMRS. Correspondingly, the first device receives the second information.

[0707] 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 position of the first DMRS through the second information, which can realize 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 position of the first DMRS, meet different communication requirements, and improve communication performance.

[0708] Optionally, the "antenna port occupied by the first DMRS" can also be replaced by an identifier of the antenna port occupied by the first DMRS, such as a serial number of the antenna port occupied by the first DMRS, and the "code division multiplexing group number of the first DMRS" can also be replaced by related information of the code division multiplexing group of the first DMRS, such as a range of the code division multiplexing group.

[0709] Optionally, the second device can send the second information through high layer signaling, such as RRC signaling or MAC CE signaling; or the second device can send the second information through physical layer signaling, such as DCI.

[0710] Optionally, the third information includes the second information, or the third information can be sent simultaneously with the second information, or the third information can be sent first and then the second information, or the second information can be sent first and then the third information.

[0711] As an example, the second information can comprise third indication information, which is an identity of an antenna port occupied by the first DMRS. For example, the second information can comprise a serial number of the antenna port occupied by the first DMRS, such as 1 bit of the second information is used to carry the identity of the antenna port occupied by the first DMRS, for example, the 1 bit can be 0, where 0 represents that the first DMRS occupies the 0th antenna port (port 0), for example, the 1 bit can be 1, where 1 represents that the first DMRS occupies port 1. As another example, the second information can comprise a range of serial numbers of the antenna port occupied by the first DMRS, for example, the range of the antenna port can be port 3 to port 5, i.e., the first DMRS occupies port 3, port 4 and port 5.

[0712] As an example, the second information can comprise fourth indication information, which is a code division multiplexing group number of the first DMRS. For example, 2 bits of the second information are used to carry the code division multiplexing group number of the first DMRS, for example, the 2 bits can be 01, where 01 represents that the code division multiplexing group number of the first DMRS on the first frequency domain unit is 1, for example, the 2 bits can be 11, where 11 represents that the code division multiplexing group number of the first DMRS on the first frequency domain unit is 2. As another example, the second information can comprise a range of code division multiplexing group numbers occupied by the first DMRS, for example, the range of the code division multiplexing group numbers can be CDM group 1 to CDM group 4, i.e., the code division multiplexing group number of the first DMRS on the first frequency domain unit is CDM group 1, CDM group 2, CDM group 3 and CDM group 4.

[0713] As an example, the second information can comprise fifth indication information, which is used to indicate a frequency domain position of the first DMRS. For example, the second information can be an index of a subcarrier of the first DMRS, where there are 12 subcarriers on an RB in each of one or more symbols, and the indexes of the subcarriers are subcarrier 0, 1, 2, …, 11. For example, the second information can be used to identify or index subcarriers 0, 4, 8, in which case the second information is used to indicate that the first DMRS occupies the 0th subcarrier, the 4th subcarrier and the 8th subcarrier on the first frequency domain unit.

[0714] As an example, the fifth indication information can indicate at least one of a starting frequency domain unit position and / or a number of frequency domain units of the first resource. For example, the fifth indication information can be DCI, and the second device sends the DCI to the first device, where the DCI indicates a starting RB and a number of RBs.

[0715] For example, the start frequency domain unit position is a position in the frequency domain resource of the first data channel, and the end frequency domain unit position is a position in the frequency domain resource of the first data channel, where the first data channel is a channel where the first DMRS is located.

[0716] For example, the fifth indication information can indicate an RBG index to which the first resource belongs. For example, the fifth indication information can be DCI, and the second device can send the DCI to the first device, and the DCI indicates a bit map of the RBG. Wherein, one RBG includes one or more RBs.

[0717] For example, the fifth indication information can indicate a position of the rate-matched frequency domain resource in the frequency domain resource of the first data channel. For example, the frequency domain resource of the first data channel includes y1 RBGs, and the rate-matched frequency domain resource can indicate an index of at least one RBG of the y1 RBGs.

[0718] Optionally, the index of the RBG can be an RBG index in the carrier or in the BWP, or an RBG index in the frequency domain resource of the first data channel.

[0719] For example, when the index of the RBG is the RBG index in the frequency domain resource of the first data channel, if the frequency domain resource of the first data channel includes y1 RBGs, the indicated rate-matched RBG index can be from 0 to y1-1. For example, the RBG index 0 represents the first RBG of the first data channel, the RBG index 1 represents the second RBG of the first data channel, and so on, and the RBG index y1-1 represents the y1th RBG of the first data channel.

[0720] For example, the fifth indication information can indicate a third index corresponding to the start frequency domain unit position of the first resource, and the third index is used to indicate one of the one or more start frequency domain unit positions. For example, the second device configures candidate start RB positions through RRC signaling, and indicates one of the start RB positions through DCI (i.e., the fifth indication information can be DCI). For example, the second device configures candidate start RB positions through RRC signaling, such as 4 positions. The second DCI indicates the start RB position, i.e., indicates one of the 4 positions configured by RRC signaling, such as 2 bits.

[0721] Optionally, the RB length is pre-defined by the protocol, or configured by RRC signaling.

[0722] For example, the fifth indication information can indicate a fourth index corresponding to the number of frequency domain units of the first resource, and the fourth index is used to indicate one of the one or more numbers of frequency domain units. For example, the second device configures four candidate RBs, such as 4 RBs, 8 RBs, 16 RBs, and 32 RBs, through RRC signaling, and the second device sends DCI (i.e., the fifth indication information can be DCI) to the first device, and the DCI indicates the number of RBs, such as indicating one of the four candidate RBs configured through RRC signaling, such as 2 bits.

[0723] Optionally, the starting RB is predefined by a protocol, for example, the starting RB is the starting RB of the first data channel.

[0724] As an example, the second information can include sixth indication information used to configure the time domain position of the first resource. The sixth indication information can be implemented by at least one of the following multiple ways.

[0725] For example, the sixth indication information can indicate a first bit map used to determine the symbol position of the first resource. For example, the second device sends DCI (i.e., the sixth indication information can be DCI) to the first device, and the DCI includes an indication of the symbol position.

[0726] Optionally, the symbol position can be indicated within a slot. For example, one slot includes x1 symbols, and the first bit map can indicate the symbol position by x1 bits. x1 is a positive integer. For example, one slot includes 14 symbols, and the bitmap is 14 bits.

[0727] Optionally, the symbol position can be indicated on the time domain resource of the first data channel. For example, the time domain resource of the first data channel includes x2 symbols, and the first bit map can indicate the symbol position by x2 bits. x2 is a positive integer. For example, the first data channel occupies 6 symbols, and the first bit map can be 6 bits.

[0728] For example, the sixth indication information can indicate at least one of the starting time unit position, the number of time units, and the time domain density of the first resource. For example, the second device sends DCI to the first device, and the DCI includes an indication of the starting symbol position and / or the symbol length. For example, the second device indicates the starting symbol position and / or the symbol length in the second DCI.

[0729] Optionally, the starting symbol position indication is indicated within a slot. For example, one slot includes x3 symbols, and the starting symbol position can be indicated by x3 bits. bits are needed to indicate the starting symbol position (e.g., 4 bits are needed to indicate the starting symbol position if 1 slot includes 14 symbols) wherein, denotes the ceiling of log2 14.

[0730] Optionally, the starting symbol position can be indicated on the time domain resource of the first data channel. For example, if the time domain resource of the first data channel includes x4 symbols, the starting symbol position can be indicated by bits are needed to indicate the starting symbol position (e.g., 4 bits are needed to indicate the starting symbol position if 1 slot includes 14 symbols) denotes the ceiling of log2 x4. For example, 3 bits are needed to indicate the starting symbol position if the first data channel only occupies 6 symbols wherein, denotes the ceiling of log2 6

[0731] Optionally, the symbol length can be 1, or 2, etc.

[0732] Optionally, the starting symbol position can be predefined, such as the starting symbol of a slot, or the starting symbol of the first data channel, etc.

[0733] Optionally, the symbol length is predefined by a protocol, or configured by RRC signaling. For example, 1 or 2, etc.

[0734] For example, the sixth indication information can indicate a second bit map. For example, the second device configures candidate symbol positions to the first device by RRC signaling, and indicates the second bit map corresponding to the symbol positions by DCI (i.e., the sixth indication information is DCI).

[0735] For example, the second device indicates candidate symbol positions to the first device by RRC signaling, such as 4 positions. The symbol position bitmap can be indicated in the DCI, such as 4 bits. For example, the number of bits of the second bit map can be equal to the number of candidate symbol positions.

[0736] For another example, the second device sends the DCI to the first device, and the symbol position bitmap is indicated in the DCI. For example, the second device indicates the symbol position bitmap in the second DCI. For example, the number of bits of the second bit map can be equal to the ceiling of log2 (the number of candidate starting symbol positions).

[0737] For example, the sixth indication information can indicate a second index corresponding to a starting time unit position of the first resource, the second index being used to indicate one of the one or more starting time unit positions. For example, the second device configures candidate starting symbol positions through RRC signaling, and indicates one of the starting symbol positions through the DCI (i.e., the sixth indication information is the DCI).

[0738] For example, the second device indicates candidate starting symbol positions to the first device through RRC signaling, such as 4 positions. The starting symbol position can be indicated in the DCI, i.e., one of the 4 positions configured through RRC signaling is indicated, such as through 2-bit information.

[0739] For example, the second device sends the DCI to the first device, and the DCI indicates the starting symbol position. For example, the second device indicates the starting symbol position in the second DCI.

[0740] Optionally, the symbol length is pre-defined by a protocol, or configured through RRC signaling. For example, 1 or 2, etc.

[0741] Optionally, the first device or the second device can determine the table of indication information of DMRS antenna ports according to the number of layers of data transmission.

[0742] For example, different tables of indication information of DMRS antenna ports are designed according to different numbers of layers of data transmission.

[0743] For example, when the number of layers of data transmission is equal to 1, the table of indication information of DMRS antenna ports is Table 6.

[0744] For example, when the number of layers of data transmission is greater than 1, the table of indication information of DMRS antenna ports is Table 7.

[0745] Optionally, the first information and the second information can be independently encoded and / or independently indicated (indicated separately).

[0746] For example, the second device can carry the first information and the second information through 6 bits, wherein 2 bits are used to carry the first information, and 4 bits are used to carry the second information.

[0747] Optionally, the first information and the second information can be jointly encoded and / or jointly indicated.

[0748] For example, the second device can jointly indicate the first information and the second information through 4 bits.

[0749] For example, the joint indication can be at least one row in Table 6:

[0750] Table 6

[0751] Optionally, the first device and / or the second device can determine the table of the second information according to the first resource pattern.

[0752] For example, the indication of the second information can refer to at least one row in Table 7:

[0753] Table 7

[0754] Optionally, the first device and / or the second device can determine the design of the DMRS according to the first resource pattern, wherein the design of the DMRS can 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 from the initial carrier with respect to the CDM group of the DMRS, the frequency division multiplexing mask, or the time division multiplexing mask.

[0755] For example, the design of the DMRS of the first type of pattern can refer to at least one row in Table 8:

[0756] Table 8

[0757] Optionally, in Table 8, p can be the serial 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 can be 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 can be the number of carriers offset from the initial carrier with respect to the CDM group.

[0758] Optionally, when the second type of pattern is the first pattern, the design of the DMRS of the second type of pattern can have multiple forms:

[0759] Example a1: the design of the DMRS of the second type of pattern includes: the antenna port of the DMRS, the CDM group number of the DMRS, and the number of carriers offset from the initial carrier with respect to the CDM group of the DMRS.

[0760] Optionally, in example a1, if the DMRS of the second type of pattern occupies 2 resource units in the second frequency domain unit of the second antenna port and 3 CDM groups, the design of the DMRS of the second type of pattern can be as shown in at least one row in Table 9:

[0761] Table 9

[0762] Optionally, in Table 9 to Table 18 below, p can be the sequence number of the antenna port of the DMRS of the second pattern in the second frequency domain unit, the CDM group number can be the group number of the CDM group included in the second frequency domain unit of the DMRS of the second pattern, and Δ in Table 8 can be the number of the carrier offset relative to the starting carrier of the CDM group.

[0763] Optionally, in example a1, if the DMRS of the second pattern occupies 2 resource units and 6 CDM groups in the second frequency domain unit of the second antenna port, the design of the DMRS of the second pattern can be at least one row in Table 10 below:

[0764] Table 10

[0765] Example a2: the design of the DMRS of the second pattern includes: the antenna port of the DMRS, the CDM group number of the DMRS, the number of the carrier offset relative to the initial carrier of the CDM group of the DMRS, and the frequency division multiplexing mask.

[0766] Optionally, in example a2, if the DMRS of the second pattern occupies 2 resource units and 3 CDM groups in the second frequency domain unit of the second antenna port, the design of the DMRS of the second pattern can be at least one row in Table 11 below:

[0767] Table 11

[0768] Optionally, in example a2, if the DMRS of the second pattern occupies 2 resource units and 6 CDM groups in the second frequency domain unit of the second antenna port, the design of the DMRS of the second pattern can be at least one row in Table 12 below:

[0769] Table 12

[0770] Optionally, the above [w f (0)w f (1)] is the frequency division multiplexing mask.

[0771] Exemplarily, when the second pattern is the second pattern, the design of the DMRS of the second pattern can have multiple forms:

[0772] Example b1: the design of the DMRS of the second pattern includes: the antenna port of the DMRS, the CDM group number of the DMRS, and the number of the carrier offset relative to the initial carrier of the CDM group of the DMRS.

[0773] Optionally, in example b1, if the port number is first frequency domain number and then time domain number, the design of the DMRS of the second pattern refers to at least one row in Table 13:

[0774] Table 13

[0775] Optionally, in example b1, if the port number is time domain number first and frequency domain number second, the design of DMRS of the second pattern can refer to at least one row in Table 14:

[0776] Table 14

[0777] Example b2: the design of DMRS of the second pattern includes: antenna port of DMRS, CDM group number of DMRS, number of carriers to which the CDM group of DMRS is offset from the initial carrier, frequency division multiplexing mask and time division multiplexing mask.

[0778] Optionally, in example b2, if the port number is frequency domain number first and time domain number second, the design of DMRS of the second pattern can refer to at least one row in Table 15:

[0779] Table 15

[0780] Optionally, the above [w t (0) w t (1)] is the time division multiplexing mask.

[0781] Optionally, in example b2, if the port number is time domain number first and frequency domain number second, the design of DMRS of the second pattern can refer to at least one row in Table 16:

[0782] Table 16

[0783] Exemplarily, when the second pattern is the third pattern, the design of DMRS of the second pattern can have multiple forms:

[0784] Example c1: when the design of DMRS includes: antenna port of DMRS, CDM group number of DMRS and number of carriers to which the CDM group of DMRS is offset from the initial carrier, the design of DMRS of the second pattern can refer to at least one row in Table 17:

[0785] Table 17

[0786] Example c2: when the design of DMRS includes: antenna port of DMRS, CDM group number of DMRS, number of carriers to which the CDM group of DMRS is offset from the initial carrier, frequency division multiplexing mask and time division multiplexing mask, the design of DMRS of the second pattern can refer to at least one row in Table 18:

[0787] Table 18

[0788] Optionally, the DMRS of the third pattern occupies 1 resource element in the third frequency domain unit of the third antenna port, and the DMRS design of the third pattern can refer to at least one row in the following table 19 in the case of 6 CDM groups:

[0789] Table 19

[0790] Optionally, the DMRS of the third pattern occupies 1 resource element in the third frequency domain unit of the third antenna port, and the DMRS design of the third pattern can refer to the following table 20 in the case of 12 CDM groups:

[0791] Table 20

[0792] Optionally, the sequence of the first DMRS can be generated according to the following generation formula:

[0793] The first device will assume that the sequence r(n) is generated according to the scaling factor β DMRS The power of the transmission is quantized according to the following formula:

[0794] k' = 0, 1, 2

[0795] k" = 0, 1

[0796] n = 0, 1, …

[0797] j = 0, 1, …, v-1

[0798] In the above formula, c init is the scrambling initial value of the pseudo-random sequence, is the slot number in the frame, is the symbol number in the slot, k is the frequency domain subcarrier, and l is the time domain symbol.

[0799] Optionally, and Δ can be determined according to the above table.

[0800] Optionally, may be determined by at least one of the following optional implementation manners:

[0801] d1, when the PDSCH is scheduled by the 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 the high layer parameter is provided in the DMRS-DownlinkConfig IE, then are given by the higher layer parameters scramblingID0 and scramblingID1, respectively;

[0802] d2, when the PDSCH is scheduled by a PDCCH using DCI format 1_0 and the CRC is scrambled by C-RNTI, MCS-C-RNTI or CS-RNTI, if the higher layer parameter is provided in the DMRS-DownlinkConfig IE, is given by the higher layer parameter scramblingID0;

[0803] d3, when the PDSCH is multicast on common MBS frequency resources and scheduled by a PDCCH using DCI format 4_2 and the CRC is scrambled by G-RNTI or G-CS-RNTI, if the higher layer parameter is provided in the DMRS-DownlinkConfig IE, 1, …, 65535} are given by the higher layer parameters scramblingID0 and scramblingID1, respectively;

[0804] d4, when the PDSCH is on common MBS frequency resources and scheduled by a PDCCH and the CRC is scrambled by G-RNTI, G-CS-RNTI, MCCH-RNTI or multicast-MCCH-RNTI, if the higher layer parameter is provided in the DMRS-DownlinkConfig IE, is given by the higher layer parameter scramblingID0;

[0805] Optionally, if none of the above manners d1-d4 is met,

[0806] Optionally, the above and may be determined by at least one of the following examples:

[0807] Example 1, if the higher layer parameter dmrs-Downlink is provided in the DMRS-DownlinkConfig IE,

[0808] where λ is the CDM group defined in clause 7.4.1.1.2.

[0809] Example 2, if the higher layer parameter dmrs-Downlink is not provided in the DMRS-DownlinkConfig IE,

[0810] Optionally, nSCID The value of ∈ {0, 1} is given by a DM-RS sequence initialization field in the DCI associated with the PDSCH transmission, n SCID = 0, otherwise it is given by the DCI association, such as including a first information field in the DCI, the first information field is used to indicate the related information of the DMRS sequence.

[0811] Optionally, the first information, the second information, or the third information in the present application can be information sent by the third device to the first device, and the first device and the second device perform DMRS transmission.

[0812] Optionally, the first information, the second information, or the third information in the present application can be information received by the first device from the third device, and the first device and the second device perform DMRS transmission.

[0813] Optionally, the first information, the second information, or the third information in the present application can be information sent by the third device to the second device, and the first device and the second device perform DMRS transmission.

[0814] Optionally, the first information, the second information, or the third information in the present application can be information received by the second device from the third device, and the first device and the second device perform DMRS transmission.

[0815] Referring to FIG. 11, the embodiment of the present application provides a communication device 1100, which can realize the functions of the first device (or the second device) in the above-mentioned method embodiments, and thus can also realize the beneficial effects possessed by the above-mentioned method embodiments. In the embodiment of the present application, the communication device 1100 can be a first device (or a second device), or an integrated circuit or element etc. inside the first device (or the second device), such as a chip, a baseband chip, a Modem chip, a SoC chip (such as a SoC chip containing a Modem core), a SIP chip, a communication module, a chip system, a processor, etc.

[0816] It should be noted that the transceiver unit 1102 can include a sending unit and a receiving unit, which are respectively used for performing sending and receiving.

[0817] In a possible implementation, when the apparatus 1100 is configured to perform the method performed by the first device in FIG. 3 and related embodiments, the apparatus 1100 includes a processing unit 1101 and a transceiver unit 1102. The processing unit 1101 is configured to determine a first resource for a first demodulation reference signal (DMRS), where a first resource pattern of the first resource includes at least one or more of a first pattern, a second pattern, or a third pattern. In the first pattern, a DMRS occupies 3 resource elements in a first frequency domain unit of a first antenna port. In the second pattern, a DMRS occupies 2 resource elements in a second frequency domain unit of a second antenna port. In the third pattern, a DMRS occupies 1 resource element in a third frequency domain unit of a third antenna port. The transceiver unit 1102 is configured to transmit or receive the first DMRS on the first resource.

[0818] In a possible implementation, when the apparatus 1100 is configured to perform the method performed by the second device in FIG. 3 and related embodiments, the apparatus 1100 includes a processing unit 1101 and a transceiver unit 1102. The processing unit 1101 is configured to determine a first resource for a first demodulation reference signal (DMRS), where a first resource pattern of the first resource includes at least one or more of a first pattern, a second pattern, or a third pattern. In the first pattern, a DMRS occupies 3 resource elements in a first frequency domain unit of a first antenna port. In the second pattern, a DMRS occupies 2 resource elements in a second frequency domain unit of a second antenna port. In the third pattern, a DMRS occupies 1 resource element in a third frequency domain unit of a third antenna port. The transceiver unit 1102 is configured to transmit or receive the first DMRS on the first resource.

[0819] In a possible design, when the communication apparatus 1100 is a communication module in a terminal device or a terminal, the function of the processing unit 1101 can be implemented by one or more processors. Specifically, the processor can include a Modem chip, a SoC chip (such as a SoC chip including a Modem core), or a SIP chip. The function of the transceiver unit 1102 can be implemented by a transceiver circuit.

[0820] In a possible design, when the communication apparatus 1100 is a circuit or chip responsible for communication functions in a terminal, such as a Modem chip or a SoC chip or a SoC chip including a Modem core or a SIP chip, the function of the processing unit 1101 can be implemented by a circuit system including one or more processors or processor cores in the above chip. The function of the transceiver unit 1102 can be implemented by an interface circuit or a data transceiver circuit on the above chip.

[0821] It should be noted that the information execution process and the like of the units of the communication apparatus 1100 described above can be specifically understood from the descriptions in the method embodiments provided in the foregoing of the present application, and thus will not be described here.

[0822] Referring to FIG. 12, another schematic structural diagram of a communication apparatus 1200 provided in the present application is shown, which includes a logic circuit 1201 and an input / output interface 1202. The communication apparatus 1200 can be a chip or an integrated circuit.

[0823] The transceiver unit 1102 shown in FIG. 11 can be a communication interface, which can be the input / output interface 1202 in FIG. 12. The input / output interface 1202 can include an input interface and an output interface. Alternatively, the communication interface can also be a transceiver circuit, which can include an input interface circuit and an output interface circuit.

[0824] In a possible implementation, when the apparatus 1200 is configured to perform the method performed by the first device in FIG. 3 and related embodiments, the logic circuit 1201 is configured to determine a first resource of a first demodulation reference signal (DMRS), a first resource pattern of the first resource including at least one or more of a first pattern, a second pattern or a third pattern, DMRS of the first pattern occupying 3 resource units in a first frequency domain unit of a first antenna port; DMRS of the second pattern occupying 2 resource units in a second frequency domain unit of a second antenna port; and DMRS of the third pattern occupying 1 resource unit in a third frequency domain unit of a third antenna port; and the input / output interface 1202 is configured to send or receive the first DMRS on the first resource.

[0825] In a possible implementation, when the apparatus 1200 is configured to perform the method performed by the second device in FIG. 3 and related embodiments, the logic circuit 1201 is configured to determine a first resource of a first demodulation reference signal (DMRS), a first resource pattern of the first resource including at least one or more of a first pattern, a second pattern or a third pattern, DMRS of the first pattern occupying 3 resource units in a first frequency domain unit of a first antenna port; DMRS of the second pattern occupying 2 resource units in a second frequency domain unit of a second antenna port; and DMRS of the third pattern occupying 1 resource unit in a third frequency domain unit of a third antenna port; and the input / output interface 1202 is configured to send or receive the first DMRS on the first resource.

[0826] The logic circuit 1201 and the input / output interface 1202 can also perform other steps and achieve corresponding beneficial effects of the communication apparatus in the foregoing embodiments, which will not be described here.

[0827] In a possible implementation, the processing unit 1101 shown in FIG. 11 can be the logic circuit 1201 in FIG. 12.

[0828] Optionally, the logic circuit 1201 can be a processing device, and the functions of the processing device can be partially or entirely implemented through software.

[0829] Optionally, the processing device can include a memory and a processor, where the memory is configured to store a computer program, and the processor is configured to read and execute the computer program stored in the memory to perform the corresponding processing and / or steps in any one of the method embodiments.

[0830] Optionally, the processing device can only include the processor. The memory for storing the computer program is located outside the processing device, and the processor is connected with the memory through a circuit / wire to read and execute the computer program stored in the memory. The memory and the processor can be integrated together or can be physically independent of each other.

[0831] Optionally, the processing device can be one or more chips or one or more integrated circuits. For example, the processing device can be one or more field-programmable gate arrays (FPGA), application specific integrated circuits (ASIC), system chips (SoC), central processing units (CPU), network processors (NP), digital signal processors (DSP), micro controller units (MCU), programmable logic devices (PLD) or other integrated chips, or any combination of the above chips or processors, etc.

[0832] Please refer to FIG. 13, which shows a communication device 1300 provided by the embodiments of the present application and related to the above embodiments. The communication device 1300 can be specifically a communication device as a terminal device in the above embodiments, and the example shown in FIG. 13 is implemented by a terminal device (or a component in the terminal device).

[0833] Optionally, the communication device 1300 can include but is not limited to at least one processor 1301 and a communication port 1302.

[0834] The transceiving unit 1102 shown in FIG. 11 can be a communication interface, which can be a communication port 1302 in FIG. 13, and the communication port 1302 can include an input interface and an output interface. Alternatively, the communication port 1302 can also be a transceiving circuit, which can include an input interface circuit and an output interface circuit.

[0835] Further optionally, the apparatus can further include at least one of a memory 1303, a bus 1304, and in the embodiments of the present application, the at least one processor 1301 is configured to control and process the actions of the communication apparatus 1300.

[0836] In addition, 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 device, transistor logic device, hardware component, or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in connection with the disclosure. The processor can also be a combination of computing functions, such as one or more microprocessor combinations, digital signal processor and microprocessor combinations, etc. Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, apparatus and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0837] It should be noted that the communication apparatus 1300 shown in FIG. 13 can be specifically used to implement the steps implemented by the terminal device in the foregoing method embodiments, and achieve the corresponding technical effects of the terminal device. The specific implementation of the communication apparatus shown in FIG. 13 can refer to the description in the foregoing method embodiments, which will not be described here.

[0838] Please refer to FIG. 14, which is a structural schematic diagram of a communication apparatus 1400 involved in the foregoing embodiments according to an embodiment of the present application. The communication apparatus 1400 can be specifically the communication apparatus as the network device in the foregoing embodiments, and the example shown in FIG. 14 is that the network device is implemented by the network device (or components in the network device), wherein the structure of the communication apparatus can refer to the structure shown in FIG. 14.

[0839] The communication device 1400 comprises at least one processor 1411 and at least one interface 1414. Further optionally, the communication device further comprises at least one memory 1412, at least one transceiver 1413 and one or more antennas 1415. The processor 1411, the memory 1412, the transceiver 1413 and the interface 1414 are connected, for example, through a bus, which can comprise various types of interfaces, transmission lines or buses in the embodiments of the present application, and the embodiments of the present application do not limit the same. The antenna 1415 is connected to the transceiver 1413. The interface 1414 is used for the communication device to communicate with other communication devices through a communication link. For example, the interface 1414 can comprise a network interface between the communication device and the core network device, for example, an S1 interface, and the network interface can comprise a network interface between the communication device and other communication devices (for example, other network devices or core network devices), for example, an X2 or Xn interface.

[0840] The transceiver unit 1102 shown in FIG. 11 can be a communication interface, which can be the interface 1414 in FIG. 14, and the interface 1414 can comprise an input interface and an output interface. Alternatively, the interface 1414 can also be a transceiver circuit, which can comprise an input interface circuit and an output interface circuit.

[0841] The processor 1411 is mainly used for processing communication protocols and communication data, and controlling the whole communication device, executing software programs, processing data of the software programs, for example, for supporting the communication device to perform the actions described in the embodiments. The communication device can comprise a baseband processor and a central processor, the baseband processor is mainly used for processing communication protocols and communication data, and the central processor is mainly used for controlling the whole terminal device, executing software programs, and processing data of the software programs. The processor 1411 in FIG. 14 can integrate the functions of the baseband processor and the central processor, and those skilled in the art can understand that the baseband processor and the central processor can also be independent processors interconnected through a bus. Those skilled in the art can understand that the terminal device can comprise multiple baseband processors to adapt to different network modes, and the terminal device can comprise multiple central processors to enhance its processing capability, and various components of the terminal device can be connected through various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processor can also be expressed as a central processing circuit or a central processing chip. The function of processing communication protocols and communication data can be built in the processor, or stored in the memory in the form of software programs, and the processor executes the software programs to realize the baseband processing function.

[0842] The memory is mainly used for storing software programs and data. The memory 1412 can exist independently of the processor 1411. Alternatively, the memory 1412 can be integrated with the processor 1411, for example, integrated in a chip. The memory 1412 is capable of storing program codes for implementing the technical solutions of the embodiments of the present application, and the execution is controlled by the processor 1411. The executed computer programs of various types can also be regarded as a driver of the processor 1411.

[0843] FIG. 14 only shows one memory and one processor. In actual terminal equipment, there can be multiple processors and multiple memories. The memory can also be referred to as a storage medium or a storage device, etc. The memory can be a storage element on the same chip as the processor, i.e., an on-chip storage element, or an independent storage element, and the embodiments of the present application do not limit this.

[0844] The transceiver 1413 can be used to support the reception or transmission of radio frequency signals between the communication device and the terminal. The transceiver 1413 can be connected to the antenna 1415. The 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 the transceiver 1413 is used to receive the radio frequency signals from the antenna and 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 the processor 1411 for further processing of the digital baseband signals or digital intermediate frequency signals by the processor 1411, such as demodulation processing and decoding processing. In addition, the transmitter Tx in the transceiver 1413 is also used to receive modulated digital baseband signals or digital intermediate frequency signals from the processor 1411, and 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 levels of down-mixing and analog-to-digital conversion to obtain digital baseband signals or digital intermediate frequency signals. The order of the down-mixing and analog-to-digital conversion can be adjusted. The transmitter Tx can selectively perform one or more levels of up-mixing and digital-to-analog conversion to obtain radio frequency signals. The order of the up-mixing and digital-to-analog conversion can be adjusted. The digital baseband signals and the digital intermediate frequency signals can be collectively referred to as digital signals.

[0845] The transceiver 1413 can also be referred to as a transceiving unit, a transceiver, a transceiving device, etc. Optionally, a device in the transceiving unit for implementing a receiving function can be regarded as a receiving unit, and a device in the transceiving unit for implementing a sending function can be regarded as a sending unit, i.e., the transceiving unit includes the receiving unit and the sending unit, the receiving unit can also be referred to as a receiver, an input port, a receiving circuit, etc., and the sending unit can be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0846] It should be noted that the communication apparatus 1400 shown in FIG. 14 can be specifically used to implement the steps implemented by the network device in the foregoing method embodiments, and achieve the corresponding technical effects of the network device. The specific implementation of the communication apparatus 1400 shown in FIG. 14 can be referred to the description in the foregoing method embodiments, which will not be repeated here.

[0847] Please refer to FIG. 15, which is a structural schematic diagram of a communication apparatus involved in the foregoing embodiments provided by the embodiments of the present application.

[0848] It can be understood that the communication apparatus 1500 includes, for example, modules, units, elements, circuits, or interfaces, etc., which are properly configured together to execute the technical solutions provided by the present application. The communication apparatus 1500 can be a terminal device or a network device described above, or a component (such as a chip) of these devices, to implement the methods described in the following method embodiments. The communication apparatus 1500 includes one or more processors 1501. The processor 1501 can be a general-purpose processor or a special-purpose processor, etc. For example, it can be 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 apparatus (such as a RAN node, a terminal, or a chip, etc.), execute software programs, and process data of software programs.

[0849] Optionally, in one design, the processor 1501 can include a program 1503 (which can also be referred to as code or instructions at times) that can be run on the processor 1501, so that the communication apparatus 1500 executes the methods described in the following embodiments. In another possible design, the communication apparatus 1500 includes a circuit (not shown in FIG. 15).

[0850] Optionally, the communication apparatus 1500 can include one or more memories 1502 having a program 1504 (which can also be referred to as code or instructions at times) stored thereon, which can be run on the processor 1501, so that the communication apparatus 1500 executes the methods described in the foregoing method embodiments.

[0851] Optionally, the processor 1501 and / or the memory 1502 can include an artificial intelligence (AI) module 1507, 1508, which is configured to implement AI-related functions. The AI module can be implemented in software, hardware, or a combination of software and hardware. For example, the AI module can include a radio intelligence control (RIC) module. For example, the AI module can be a near-real-time RIC or a non-real-time RIC.

[0852] Optionally, the processor 1501 and / or the memory 1502 can also store data. The processor and the memory can be separately arranged or integrated together.

[0853] Optionally, the communication device 1500 can also include a transceiver 1505 and / or an antenna 1506. The processor 1501 can also be referred to as a processing unit, which controls the communication device (e.g., a RAN node or a terminal). The transceiver 1505 can also be referred to as a transceiving unit, a transceiver, a transceiving circuit, or a transceiver, which is configured to implement the transceiving function of the communication device through the antenna 1506.

[0854] In the figure, the processing unit 1101 can be the processor 1501. The transceiving unit 1102 can be a communication interface, which can be the transceiver 1505 in the figure 15. The transceiver 1505 can include an input interface and an output interface. Alternatively, the transceiver 1505 can be a transceiving circuit, which can include an input interface circuit and an output interface circuit.

[0855] The embodiments of the present application also provide a computer readable storage medium for storing one or more computer execution instructions, when the computer execution instructions are executed by a computer, the computer executes the method of the possible implementation manners of the first device or the second device as described above.

[0856] The embodiments of the present application also provide a computer program product (or computer program), when the computer program product is executed by a computer, the computer executes the method of the possible implementation manners of the first device or the second device as described above.

[0857] The embodiments of the present application further provide a chip system, which comprises at least one processor for supporting the communication device to implement the functions involved in the possible implementation manners of the communication device. Optionally, the chip system further comprises an interface circuit for providing the at least one processor with program instructions and / or data. In a possible design, the chip system can further comprise a memory for storing the necessary program instructions and data of the communication device. The chip system can be composed of a chip, or can include the chip and other discrete components, and the communication device can be specifically the first device or the second device in the foregoing method embodiments.

[0858] The embodiments of the present application further provide a communication system, which comprises the first device in any of the foregoing embodiments.

[0859] Optionally, the communication system further comprises the second device.

[0860] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other manners. For example, the device embodiments described above are only schematic; the division of the units is only a logical function division; there can be another division manner for the actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between different units, or the among different units, can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0861] The units described as separated components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the embodiments of the present application.

[0862] In addition, each of the functional units in the various embodiments of the present application can be integrated in one processing unit, or each unit can exist physically independently, or two or more units can be integrated in one unit. The integrated unit can be implemented in the form of hardware or in the form of a software functional unit. When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such an understanding, the technical solutions of the present application, in essence, or the parts that make contributions, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method according to the various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

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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