Communication method and communication apparatus

Abstract

The present application provides a communication method and a communication apparatus. In the method, a second apparatus can send first configuration information and first indication information to a first apparatus, so as to configure for the first apparatus a first resource pattern of a DMRS that is applicable to a first radio access technique, and indicate to the first apparatus resources of ports (for example, P1 ports among P ports of the first resource pattern) for receiving the DMRS. Moreover, the resources of the P1 ports are orthogonal to resources of P2 ports of a second resource pattern applicable to a second radio access technique, so that compatibility with 5G can be realized. Optionally, the P ports further comprise P3 ports, the P3 ports are different from the P1 ports, and resources of the P3 ports are not orthogonal to the resources of the P2 ports, that is, resources of some ports of the first resource pattern are not orthogonal to resources of some ports of the second resource pattern, which indicates that the two resource patterns are not fully orthogonal, and are applicable to different radio access techniques.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 30, 2024, with application number 202410142179.8 and application name “A Communication Method and Communication Device”, the entire contents of which are incorporated by reference into this application. Technical Field

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

[0003] Dynamic spectrum access (DSS) can achieve smooth evolution between different radio access technologies (RAT). For example, dynamic spectrum sharing can transmit long term evolution (LTE) and new radio (NR) data in the same frequency band through frequency division multiplexing or time division multiplexing. When LTE and NR share spectrum, LTE will always send downlink cell reference signal (CRS). Therefore, to avoid resource conflicts between NR channels and signals and CRS, NR downlink signals (such as demodulation reference signal (DMRS)) must not conflict with LTE CRS. With the evolution of future communication systems (such as the 6th generation (the 6th generation)), LTE will continue to send downlink cell reference signal (CRS). Therefore, to avoid resource conflicts between NR channels and signals and CRS, NR downlink signals (such as demodulation reference signal (DMRS)) must not conflict with LTE CRS. th Generation, 6G) communications, etc.), how to design the DMRS resource pattern to reduce DMRS overhead and improve spectrum sharing efficiency in dynamic spectrum sharing scenarios of different wireless access technologies has become an unresolved problem. Summary of the Invention

[0004] The present application provides a communication method and a communication device, which designs a DMRS resource pattern suitable for a first wireless access technology (such as 6G), which can reduce DMRS overhead and improve spectrum sharing efficiency in dynamic spectrum sharing scenarios of different wireless access technologies.

[0005] In a first aspect, the present application provides a communication method, which is performed by a first device. For example, the first device can be a terminal, or a component of a terminal (such as a processor, chip, or chip system), or a logic module that can implement all or part of the terminal's functions. The first device receives first configuration information for a first radio access technology, where the first configuration information is used to configure a first resource pattern, where the first resource pattern includes P antenna ports. The first device receives first indication information, where the first indication information indicates P1 antenna ports among the P antenna ports, where resources of the P1 antenna port are orthogonal to resources of the P2 antenna ports included in a second resource pattern; the P antenna ports also include P3 antenna ports, where the P3 antenna port is different from the P1 antenna port, and where resources of the P3 antenna port are not orthogonal to resources of the P2 antenna port. The second resource pattern is applicable to a second radio access technology, where the first radio access technology is different from the second radio access technology, and where P, P1, P2, and P3 are positive integers, where P1, P2, and P3 are all less than P. The first device receives a demodulation reference signal on the resources of the P1 antenna port.

[0006] In this method, the first device can receive first configuration information and first indication information, thereby determining a first resource pattern of a demodulation reference signal (DMRS) applicable to 6G, and determining the resources of the antenna port for receiving DMRS (for example, the P1 antenna port among the P antenna ports of the first resource pattern). In addition, the resources of the P1 antenna port are orthogonal to the resources of the P2 antenna ports of the second resource pattern applicable to the second wireless access technology (such as 5G), and can achieve compatibility with 5G. For example, in a dynamic spectrum sharing scenario, the network device can send orthogonal DMRS to 5G terminals and 6G terminals respectively on the same time domain symbol to achieve spatial division multiplexing between 5G and 6G terminals, save DMRS overhead, and improve spectrum sharing efficiency. Optionally, the P antenna ports also include P3 antenna ports, and the P3 antenna ports are different from the P1 antenna ports. The resources of the P3 antenna ports are not orthogonal to the resources of the P2 antenna ports, that is, the resources of some antenna ports of the first resource pattern are not orthogonal to the resources of some antenna ports of the second resource pattern, indicating that the two resource patterns are not completely orthogonal and are applicable to different wireless access technologies. Optionally, the mutual orthogonality described in this application may also refer to pseudo-orthogonality, that is, the two DMRS sequences have low mutual correlation. Optionally, the resource pattern is applicable to the wireless access technology, and it can also be referred to as the resource pattern adopted by the transmitter or receiver in the wireless access technology; for example, the second resource pattern is applicable to the second wireless access technology, indicating that the transmitter or receiver (such as the transmitter is a 5G terminal and the receiver is a 5G base station) adopting the second wireless access technology adopts the second resource pattern (indicating the port and time-frequency resources) to transmit or receive the reference signal.

[0007] In one possible implementation, the first configuration information is further used to configure a third resource pattern, where the third resource pattern includes Q antenna ports. The first apparatus is further configured to receive second indication information, where the second indication information is used to indicate Q1 antenna ports among the Q antenna ports, where resources of the Q1 antenna port are not orthogonal to resources of the P2 antenna ports; Q and Q1 are positive integers, and Q1 is less than or equal to Q. The first apparatus may receive a demodulation reference signal on the resources of the Q1 antenna port.

[0008] In this embodiment, the third resource pattern is a resource pattern applicable to 6G, and the resources of the Q1 antenna port in the third resource pattern are not orthogonal to the resources of the P2 antenna port, for example, they are not orthogonal to the resources of the 5G antenna port, and are only applicable to 6G terminals. In a scenario where only 6G terminals are present, all 6G terminals can use the third resource pattern, which can achieve spatial division multiplexing between different 6G terminals, save DMRS overhead, and improve data transmission efficiency.

[0009] In a possible implementation, the first device sends third indication information, where the third indication information is used to indicate that the terminal supports the first resource pattern and the third resource pattern.

[0010] In this embodiment, the third indication information can indicate the capability of the terminal. For example, assuming that the 6G terminal supports both the first resource pattern (which can be orthogonal to the resources of some antenna ports of the 5G terminal, thereby achieving compatibility with 5G), and the third resource pattern (in a scenario where there are only 6G terminals, 6G terminals can all use the third resource pattern), the first device can report the capability of the terminal.

[0011] In a possible implementation manner, the first indication information is further used to indicate the first resource pattern, and the second indication information is further used to indicate the third resource pattern.

[0012] In this implementation, the first indication information may also indicate the first resource pattern. For example, the first indication information carries the index of the first resource pattern, thereby indicating the first resource pattern. Similarly, the second indication information carries the index of the third resource pattern, thereby indicating the third resource pattern.

[0013] In one possible implementation, the third resource pattern includes an adjacent first resource block and a second resource block, each resource block including multiple resource units; wherein, 8 resource units in the first resource block and the second resource block are used to transmit a demodulation reference signal; the 8 resource units are non-adjacent and are separated by 2 resource units respectively; or, the 8 resource units are grouped into 4, and each group of resource units is non-adjacent and is separated by 8 resource units.

[0014] In one possible implementation, the third resource pattern includes three code division multiplexing groups. Each code division multiplexing group corresponds to four independent antenna ports, and any code division multiplexing in each code division multiplexing group includes four resource units; the four resource units use a frequency-domain orthogonal cover code (OCC) with a length of 4, and the four resource units belong to the same resource block, and the four resource units are numbered as follows: k, k+3, k+6, k+9, or the four resource units are numbered as follows: k, k+1, k+2, k+3, where k is an integer greater than or equal to 0.

[0015] In one possible implementation, the third resource pattern includes three code division multiplexing groups. Each code division multiplexing group corresponds to 8 independent antenna ports, and any code division multiplexing in each code division multiplexing group includes 8 resource units. The 8 resource units use a frequency domain OCC of length 8, and the 8 resource units belong to two adjacent resource blocks in the frequency domain. The 8 resource units are numbered as follows: k, k+3, k+6, k+9, k+12, k+15, k+18, k+21, or the 8 resource units are numbered as follows: k, k+1, k+2, k+3, k+12, k+13, k+14, k+15.

[0016] In the above implementation, several possible frequency domain distributions of resource units for code division multiplexing in the third resource pattern are designed; assuming that each resource unit corresponds to a time domain symbol and a spatial domain antenna port, the resources of the Q1 antenna ports of the third resource pattern can be determined based on the distribution of the resource units in the frequency domain. Optionally, different code division multiplexing groups correspond to different antenna ports. For example, the three code division multiplexing groups are assumed to be the first code division multiplexing group, the second code division multiplexing group, and the third code division multiplexing group. Then, the four antenna ports corresponding to the first code division multiplexing group are different from the four antenna ports corresponding to the second code division multiplexing group, and are also different from the four antenna ports corresponding to the third code division multiplexing group.

[0017] In one possible implementation, the first resource pattern includes six code division multiplexing groups, the first resource pattern includes a first resource block, and the first resource block includes multiple resource units; wherein, any code division multiplexing in each code division multiplexing group includes 2 resource units, the 2 resource units are non-adjacent and are separated by 1 resource unit, or the 2 resource units are non-adjacent and are separated by 5 resource units.

[0018] In one possible implementation, the first resource pattern includes six code division multiplexing groups, where each code division multiplexing group corresponds to two independent antenna ports, and any code division multiplexing in each code division multiplexing group includes two resource units, the two resource units use a frequency domain OCC of length 2, the two resource units belong to the same resource block, and the two resource units are numbered as k, k+2, or the two resource units are numbered as k, k+6, where k is an integer greater than or equal to 0.

[0019] In one possible implementation, the first resource pattern includes six code division multiplexing groups. Each code division multiplexing group corresponds to four independent antenna ports, and any code division multiplexing in each code division multiplexing group includes four resource units. The four resource units use a frequency domain OCC of length 4. The four resource units belong to the same resource block and are numbered as k, k+1, k+6, and k+7, respectively, where k is an integer greater than or equal to 0.

[0020] In one possible implementation, the first resource pattern includes six code division multiplexing groups. Each code division multiplexing group corresponds to four independent antenna ports, and any code division multiplexing in each code division multiplexing group includes four resource units. The four resource units use a frequency domain OCC of length 4, and the four resource units belong to two adjacent resource blocks. The four resource units are numbered as follows: k, k+1, k+12, and k+13, respectively, where k is an integer greater than or equal to 0.

[0021] In one possible implementation, the first resource pattern includes four code division multiplexing groups, the first resource pattern includes a first adjacent resource block and a second adjacent resource block, and the first resource block and the second resource block each include multiple resource units. The even-numbered resource units in the first and second resource blocks belong to the first and third code division multiplexing groups of the four code division multiplexing groups; the first code division multiplexing group and the third code division multiplexing group are different; the four resource units in any one code division multiplexing group in the first code division multiplexing group are different from the two resource units in any one code division multiplexing group in the third code division multiplexing group; the four resource units are non-adjacent and are separated by one resource unit, and the two resource units are non-adjacent and are separated by one resource unit. The odd-numbered resource units in the first resource block and the second resource block belong to the second and fourth code division multiplexing groups of the four code division multiplexing groups; the second code division multiplexing group and the fourth code division multiplexing group are different; the four resource units of any code division multiplexing in the second code division multiplexing group and the two resource units of any code division multiplexing in the fourth code division multiplexing group are different; the four resource units are non-adjacent and are separated by one resource unit respectively; and the two resource units are non-adjacent and are separated by one resource unit. The resource pattern corresponding to the first resource block is the same as the resource pattern corresponding to the second resource block; or, the resource pattern corresponding to the first resource block is the frequency-domain flip of the resource pattern corresponding to the second resource block.

[0022] In a possible implementation manner, the first resource pattern includes four code division multiplexing groups. Among them, the first code division multiplexing group and the second code division multiplexing group of the four code division multiplexing groups correspond to 4 independent antenna ports respectively, the first code division multiplexing group and the second code division multiplexing group are different, any code division multiplexing in the first code division multiplexing group and the second code division multiplexing group includes 4 resource units, the 4 resource units use a frequency domain OCC with a length of 4, the 4 resource units belong to the first resource block, and the 4 resource units are numbered: k, k+2, k+4, k+6, k is an integer greater than or equal to 0; the third code division multiplexing group and the fourth code division multiplexing group of the four code division multiplexing groups correspond to 2 independent antenna ports respectively, the third code division multiplexing group and the fourth code division multiplexing group are different, any code division multiplexing in the third code division multiplexing group and the fourth code division multiplexing group includes 2 resource units, the 2 resource units use a frequency domain OCC with a length of 2, the 2 resource units belong to the second resource block, and the 2 resource units are numbered: r, r+2, r is an integer greater than or equal to 0.

[0023] In one possible implementation, the first resource pattern includes four code division multiplexing groups. Each code division multiplexing group corresponds to four independent antenna ports, and any code division multiplexing in each code division multiplexing group includes four resource units. The four resource units use a frequency domain OCC with a length of 4. The four resource units belong to the same resource block or two adjacent resource blocks in the frequency domain, and the four resource units are numbered as follows: k, k+2, k+4, k+6, where k is an integer greater than or equal to 0. Optionally, when the four resource units belong to two adjacent resource blocks, the four resource units are numbered as follows: k+8, k+10 for the first resource block and r, r+2 for the adjacent second resource block, where r is an integer greater than or equal to 0.

[0024] In one possible implementation, the first resource pattern includes a first resource unit resource set and a second resource unit resource set, and the first resource pattern includes at least two code division multiplexing groups. The resource units of the first resource unit resource set belong to a first code division multiplexing group of the at least two code division multiplexing groups, and the length of the OCC of the first code division multiplexing group is greater than 4; the resource units of the second resource unit resource set belong to a second code division multiplexing group of the at least two code division multiplexing groups, and the length of the OCC of the second code division multiplexing group is 2 and / or 4.

[0025] In one possible implementation, the first resource pattern includes two code division multiplexing groups. The first of the two code division multiplexing groups corresponds to 6 independent antenna ports, and any code division multiplexing in the first code division multiplexing group includes 6 resource units. The 6 resource units use a frequency domain OCC with a length of 6. The 6 resource units belong to the same resource block, and the 6 resource units are numbered as follows: k, k+2, k+4, k+6, k+8, k+10, where k is an integer greater than or equal to 0; the second of the two code division multiplexing groups corresponds to 4 independent antenna ports, and any code division multiplexing in the second code division multiplexing group includes 4 resource units. The 4 resource units use a frequency domain OCC with a length of 4. The 4 resource units belong to the same resource block or two adjacent resource blocks in the frequency domain, and the 4 resource units are numbered as follows: k+1, k+3, k+5, k+7.

[0026] In one possible implementation, the first resource pattern includes two code division multiplexing groups. The first of the two code division multiplexing groups corresponds to 6 independent antenna ports, and any code division multiplexing in the first code division multiplexing group includes 6 resource units. The 6 resource units use a frequency domain OCC with a length of 6. The 6 resource units belong to the same resource block, and the 6 resource units are numbered as follows: k, k+2, k+4, k+6, k+8, k+10, where k is an integer greater than or equal to 0; the second of the two code division multiplexing groups corresponds to 2 independent antenna ports, and any code division multiplexing in the second code division multiplexing group includes 2 resource units. The 2 resource units use a frequency domain OCC with a length of 2. The 2 resource units belong to the same resource block and are numbered as follows: r+1, r+3, where r is an integer greater than or equal to 0.

[0027] In one possible embodiment, the first resource pattern includes six code division multiplexing groups, and the first resource pattern includes adjacent first resource blocks and second resource blocks, wherein each code division multiplexing is used to transmit four resource units of a demodulation reference signal and is grouped in pairs, and each group of resource units is non-adjacent and spaced apart by four resource units; or, each group of resource units is non-adjacent and spaced apart by ten resource units.

[0028] In one possible implementation, the first resource pattern includes three code division multiplexing groups, the first resource pattern including a first adjacent resource block and a second adjacent resource block, each resource block including multiple resource units. Each code division multiplexing in each code division multiplexing group includes eight resource units, and the eight resource units are grouped in pairs, and each group of resource units is non-adjacent and separated by four resource units.

[0029] In one possible implementation, the first resource pattern includes three code division multiplexing groups. Each code division multiplexing group corresponds to eight independent antenna ports, and any code division multiplexing in each code division multiplexing group includes eight resource units. The eight resource units use a frequency domain OCC of length 8, and the eight resource units belong to two adjacent resource blocks. The eight resource units are numbered as follows: k, k+1, k+6, k+7, k+12, k+13, k+18, and k+19, where k is an integer greater than or equal to 0.

[0030] In the above implementation, multiple possible distributions of resource units used for code division multiplexing in the first resource pattern in the frequency domain are designed; assuming that each resource unit corresponds to a time domain symbol and a spatial domain antenna port, the resources of the P1 antenna ports of the first resource pattern can be determined based on the distribution of the above resource units in the frequency domain.

[0031] In a second aspect, the present application provides a communication method, which is performed by a second device. For example, the second device can be a network device (such as a base station), or a component of the network device (such as a processor, a chip, or a chip system), or a logic module that can implement all or part of the network device functions. The second device sends first configuration information of a first radio access technology, where the first configuration information is used to configure a first resource pattern, and the first resource pattern includes P antenna ports. The second device sends first indication information, where the first indication information is used to indicate P1 antenna ports among the P antenna ports, where the resources of the P1 antenna port are orthogonal to the resources of the P2 antenna ports included in the second resource pattern; the P antenna ports also include P3 antenna ports, where the P3 antenna port is different from the P1 antenna port, and the resources of the P3 antenna port are not orthogonal to the resources of the P2 antenna port; the second resource pattern is applicable to a second radio access technology, where the first radio access technology is different from the second radio access technology, and P, P1, P2, and P3 are positive integers, where P1, P2, and P3 are all less than P. The second device sends a demodulation reference signal on resources of P1 antenna ports.

[0032] In this method, the second device can send first configuration information and first indication information, thereby configuring a first resource pattern of a demodulation reference signal DMRS applicable to 6G to the first device, and indicating to the first device the resources of the antenna port receiving DMRS (for example, the P1 antenna port among the P antenna ports of the first resource pattern). In addition, the resources of the P1 antenna port are orthogonal to the resources of the P2 antenna ports of the second resource pattern applicable to the second radio access technology, and compatibility with 5G can be achieved. Optionally, the P antenna ports also include P3 antenna ports, which are different from the P1 antenna ports, and the resources of the P3 antenna port are not orthogonal to the resources of the P2 antenna ports, that is, the resources of some antenna ports of the first resource pattern are not orthogonal to the resources of some antenna ports of the second resource pattern, indicating that the two resource patterns are not completely orthogonal and are applicable to different radio access technologies.

[0033] In one possible implementation, the first configuration information is further used to configure a third resource pattern, where the third resource pattern includes Q antenna ports. The second apparatus is further configured to send second indication information, where the second indication information is used to indicate Q1 antenna ports among the Q antenna ports, where resources of the Q1 antenna port are not orthogonal to resources of the P2 antenna ports; Q and Q1 are positive integers, and Q1 is less than or equal to Q. The second apparatus may send a demodulation reference signal on the resources of the Q1 antenna port.

[0034] In this embodiment, the third resource pattern is a resource pattern applicable to 6G, and the resources of the Q1 antenna ports of the third resource pattern are not orthogonal to the resources of the P2 antenna ports, for example, they are not orthogonal to the resources of the 5G antenna ports, and are only applicable to 6G terminals.

[0035] In a possible implementation, the second device receives third indication information, where the third indication information is used to indicate that the terminal supports the first resource pattern and the third resource pattern.

[0036] In this embodiment, the second device can obtain the capabilities of the terminal. For example, assuming that the 6G terminal supports both the first resource pattern (which can be orthogonal to the resources of some antenna ports of the 5G terminal, thereby achieving compatibility with 5G), and the third resource pattern (in a scenario where there are only 6G terminals, 6G terminals can all use the third resource pattern), the second device can receive the third indication information to obtain the capabilities of the terminal.

[0037] In a possible implementation manner, the first indication information is further used to indicate the first resource pattern, and the second indication information is further used to indicate the second resource pattern.

[0038] In this implementation, the first indication information may also indicate the first resource pattern. For example, the first indication information carries the index of the first resource pattern, thereby indicating the first resource pattern. Similarly, the second indication information carries the index of the second resource pattern, thereby indicating the second resource pattern.

[0039] Optionally, other implementations of the communication method may refer to the corresponding description in the first aspect, for example, the description of the first resource pattern, the third resource pattern, etc. in the first aspect, which will not be repeated here.

[0040] In a third aspect, the present application provides a communication device. The communication device may be a terminal, or a component of a terminal (such as a processor, a chip, or a chip system, etc.), or a device that can be used in conjunction with a terminal. In one possible implementation, the communication device has the function of implementing the first aspect above. For example, the communication device includes a module or unit or means corresponding to the operation involved in the first aspect above. The module or unit or means can be implemented by software, or by hardware, or by a combination of software and hardware.

[0041] In one possible implementation, the communication device includes a communication unit and a processing unit. The communication unit is configured to receive first configuration information for a first radio access technology, the first configuration information being used to configure a first resource pattern, the first resource pattern including P antenna ports. The communication unit is further configured to receive first indication information, the first indication information being used to indicate P1 antenna ports among the P antenna ports, the resources of the P1 antenna port being orthogonal to the resources of the P2 antenna ports included in the second resource pattern; the P antenna ports also including P3 antenna ports, the P3 antenna port being different from the P1 antenna port, and the resources of the P3 antenna port being non-orthogonal to the resources of the P2 antenna port. The second resource pattern is applicable to a second radio access technology, the first radio access technology is different from the second radio access technology, P, P1, P2, and P3 are positive integers, and P1, P2, and P3 are all less than P. The communication unit is further configured to receive a demodulation reference signal on the resources of the P1 antenna port.

[0042] In this embodiment, the communication unit can receive the first configuration information and the first indication information, thereby determining a first resource pattern of DMRS applicable to 6G, and determining the resources of the antenna port receiving DMRS (for example, the P1 antenna port among the P antenna ports of the first resource pattern). In addition, the resources of the P1 antenna port are orthogonal to the resources of the P2 antenna port of the second resource pattern applicable to the second radio access technology, and can achieve compatibility with 5G. For example, in a dynamic spectrum sharing scenario, the network device can send orthogonal DMRS to 5G terminals and 6G terminals on the same time domain symbol to achieve spatial division multiplexing between 5G and 6G terminals, save DMRS overhead, and improve spectrum sharing efficiency. Optionally, the P antenna ports also include P3 antenna ports, which are different from the P1 antenna ports. The resources of the P3 antenna port are not orthogonal to the resources of the P2 antenna port, that is, the resources of some antenna ports of the first resource pattern are not orthogonal to the resources of some antenna ports of the second resource pattern, indicating that the two resource patterns are not completely orthogonal and are applicable to different radio access technologies. Optionally, the mutual orthogonality described in this application may also refer to pseudo-orthogonality, that is, the two DMRS sequences have low mutual correlation.

[0043] Optionally, other possible implementations in the third aspect can refer to the corresponding descriptions of other possible implementations in the first aspect, and will not be repeated here.

[0044] In a fourth aspect, the present application provides a communication device. The communication device may be a network device, or a component of a network device (such as a processor, a chip, or a chip system, etc.), or a device that can be used in conjunction with a network device. In one possible implementation, the communication device has the function of implementing the second aspect above. For example, the communication device includes a module or unit or means corresponding to the operation involved in the second aspect above. The module or unit or means can be implemented specifically through software, or through hardware, or through a combination of software and hardware.

[0045] In one possible implementation, the communication device includes a communication unit and a processing unit. The communication unit is configured to send first configuration information for a first radio access technology, the first configuration information being used to configure a first resource pattern, the first resource pattern including P antenna ports. A second device sends first indication information, the first indication information being used to indicate P1 antenna ports among the P antenna ports, the resources of the P1 antenna port being orthogonal to the resources of the P2 antenna ports included in the second resource pattern; the P antenna ports also including P3 antenna ports, the P3 antenna port being different from the P1 antenna port, and the resources of the P3 antenna port being non-orthogonal to the resources of the P2 antenna port; the second resource pattern being applicable to a second radio access technology, the first radio access technology being different from the second radio access technology, P, P1, P2, and P3 being positive integers, wherein P1, P2, and P3 are all less than P. The communication unit is further configured to send a demodulation reference signal on the resources of the P1 antenna port.

[0046] In this embodiment, the communication unit can send first configuration information and first indication information, thereby configuring a first resource pattern of a demodulation reference signal DMRS applicable to 6G to the first device, and indicating to the first device the resources of the antenna port for receiving DMRS (for example, the P1 antenna port among the P antenna ports of the first resource pattern). In addition, the resources of the P1 antenna port are orthogonal to the resources of the P2 antenna ports of the second resource pattern applicable to the second radio access technology, and compatibility with 5G can be achieved. Optionally, the P antenna ports also include a P3 antenna port, and the P3 antenna port is different from the P1 antenna port. The resources of the P3 antenna port are not orthogonal to the resources of the P2 antenna port, that is, the resources of some antenna ports of the first resource pattern are not orthogonal to the resources of some antenna ports of the second resource pattern, indicating that the two resource patterns are not completely orthogonal and are applicable to different radio access technologies.

[0047] Optionally, other possible implementations of the fourth aspect can refer to the corresponding descriptions of other possible implementations of the second aspect, and will not be repeated here.

[0048] In a fifth aspect, the present application provides a communication device comprising a memory and one or more processors. The memory is used to store part or all of the necessary computer programs or instructions for implementing the functions involved in at least one of the first and second aspects above. The one or more processors can execute the computer programs or instructions. When the computer programs or instructions are executed, the communication device implements at least one of the following: the method in the first aspect and any possible implementation of the first aspect, and the method in the second aspect and any possible implementation of the second aspect.

[0049] In one possible design, the communication device may further include an interface circuit, wherein the processor is configured to communicate with other devices or components through the interface circuit.

[0050] In one possible design, the communication device may further include a memory.

[0051] In one possible design, the communication device may be a terminal, or a communication module in a terminal, or a chip in the terminal responsible for communication functions such as a modem chip or a SoC or SIP chip including a modem module.

[0052] In a sixth aspect, the present application provides a communication device comprising: a processor and an interface circuit, the interface circuit being used to receive signals from other communication devices and transmit them to the processor or to send signals from the processor to other communication devices, the processor being used to implement at least one of the following through logic circuits or execution code instructions: the method in the first aspect and any possible implementation of the first aspect, the method in the second aspect and any possible implementation of the second aspect.

[0053] In the seventh aspect, the present application provides a communication system, which includes at least one device or equipment among the fourth to fifth aspects above, so that the at least one device or equipment above performs at least one of the following: the method in the first aspect and any possible implementation of the first aspect, the method in the second aspect and any possible implementation of the second aspect.

[0054] In an eighth aspect, the present application provides a computer-readable storage medium storing instructions, which, when executed on a computer, causes the computer to execute at least one of the following: the method in the first aspect and any possible implementation of the first aspect, the method in the second aspect and any possible implementation of the second aspect.

[0055] In a ninth aspect, the present application provides a computer program product comprising instructions, which, when executed on a computer, cause the computer to execute at least one of the following: the method of the first aspect and any possible implementation of the first aspect, the method of the second aspect and any possible implementation of the second aspect.

[0056] In a tenth aspect, the present application provides a chip comprising a processor (or a logic circuit). Optionally, the chip may further comprise a communication interface (or interface) for implementing at least one of the following: the method in the first aspect and any possible implementation of the first aspect, the method in the second aspect and any possible implementation of the second aspect. In one possible implementation, if the chip is the smallest processing unit in the entire machine, the chip may be a processor, or may comprise a processor and a memory, or may comprise a processor, a memory, and a transceiver, for implementing at least one of the following: the method in the first aspect and any possible implementation of the first aspect, the method in the second aspect and any possible implementation of the second aspect.

[0057] In an eleventh aspect, the present application provides a chip system. The chip system includes a processor and an interface. Optionally, the chip system may also include a memory for implementing at least one of the following: the method in the first aspect and any possible implementation of the first aspect, and the method in the second aspect and any possible implementation of the second aspect. The chip system may be composed of a chip or may include a chip and other discrete components. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] FIG1 is a schematic diagram of a communication system provided by this application;

[0059] FIG2 is a schematic diagram of a single-symbol DMRS;

[0060] FIG3 is a schematic diagram of a dual-symbol DMRS;

[0061] FIG4 is a schematic diagram of multiple antenna ports and corresponding resource grids;

[0062] FIG5 is a schematic diagram of multiple resource grids and corresponding different OCCs;

[0063] FIG6 is a schematic diagram of a distribution of Type 1 single-symbol DMRS;

[0064] FIG7 is a schematic diagram of a distribution of Type 1 dual-symbol DMRS;

[0065] FIG8 is a flow chart of a communication method provided by the present application;

[0066] FIG9 is a schematic diagram of a CDM distribution of a first resource pattern in a resource block and antenna ports included in each CDM group provided by the present application;

[0067] FIG10 is a schematic diagram of antenna ports and antenna port resources of R15, R18, and R20 provided in the present application;

[0068] FIG11 is a schematic diagram of another antenna port and antenna port resources of R15, R18 and R20 provided in the present application;

[0069] FIG12 is a schematic diagram of CDM distribution in a resource block and antenna ports included in each CDM group of another first resource pattern provided by the present application;

[0070] FIG13 is a schematic diagram of another antenna port and antenna port resources of R15, R18 and R20 provided in the present application;

[0071] FIG14 is a schematic diagram of another antenna port and antenna port resources of R15, R18 and R20 provided in the present application;

[0072] FIG15 is a schematic diagram of a CDM distribution of a first RE resource set and a second RE resource set and antenna ports included in each CDM group provided by the present application;

[0073] FIG16 is a schematic diagram of a CDM distribution of a first resource pattern in a resource block provided by the present application, antenna ports included in each CDM group, antenna ports of R15, R18, and R20, and resources of the antenna ports;

[0074] FIG17 is a schematic diagram of CDM distribution of another first resource pattern provided by the present application in a resource block and antenna ports included in each CDM group;

[0075] FIG18 is a schematic diagram of another antenna port and antenna port resources of R15, R18 and R20 provided by the present application;

[0076] FIG19 is a schematic diagram of the CDM distribution of another first resource pattern provided by the present application in a resource block, the antenna ports included in each CDM group, and the antenna ports of R15, R18 and R20 and the resources of the antenna ports;

[0077] FIG20 is a schematic diagram of a third resource pattern provided by this application;

[0078] FIG21 is a schematic diagram of a communication device provided by the present application;

[0079] FIG22 is a schematic diagram of another communication device provided in this application. DETAILED DESCRIPTION

[0080] 1. For ease of understanding, the following is a detailed introduction to the definitions of relevant terms involved in this application:

[0081] 1. Network architecture:

[0082] The communication method provided in this application can be applied to a communication system 1000 as shown in FIG1 . For example, the communication system includes a radio access network (RAN) 100, wherein the RAN 100 includes at least one RAN node (such as 110a and 110b in FIG1 , collectively referred to as 110), and may also include at least one terminal (such as 120a-120j in FIG1 , collectively referred to as 120). The RAN 100 may also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in FIG1 ). The terminal 120 is wirelessly connected to the RAN node 110. Terminals and RAN nodes may be connected to each other via wired or wireless connections. The communication system 1000 may also include a core network 200. The RAN node 110 is wirelessly or wiredly connected to the core network 200. The core network devices in the core network 200 and the RAN node 110 in the RAN 100 may be independent and distinct physical devices, or they may be a single physical device that integrates the logical functions of the core network devices and the logical functions of the RAN nodes. The communication system 1000 may also include the Internet 300 .

[0083] RAN100 may be an evolved universal terrestrial radio access (E-UTRA) system, a new radio (NR) system, or a future radio access system defined in the 3rd Generation Partnership Project (3GPP). RAN100 may also include two or more of the aforementioned different radio access systems. RAN100 may also be an open RAN (O-RAN).

[0084] A RAN node, also known as a radio access network device, RAN entity, or access node, facilitates wireless access to a communication system by a terminal. In one application scenario, a RAN node can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next-generation NodeB (gNB) in a fifth-generation (5G) mobile communication system, a next-generation base station in a sixth-generation (6G) mobile communication system, or a base station in a future mobile communication system. A RAN node can be a macro base station (such as 110a in Figure 1), a micro base station, an indoor station (such as 110b in Figure 1), a relay node, or a donor node.

[0085] In another application scenario, multiple RAN nodes can collaborate to help terminals achieve wireless access, with different RAN nodes implementing portions of the base station's functions. For example, a RAN node can be a centralized unit (CU), a distributed unit (DU), or a radio unit (RU). The CU implements the base station's radio resource control protocol and packet data convergence protocol (PDCP) functions, as well as the service data adaptation protocol (SDAP) functions. The DU implements the base station's radio link control layer and medium access control (MAC) layer functions, as well as some or all of the physical layer functions. For detailed descriptions of each of the above protocol layers, please refer to the relevant 3GPP technical specifications. The RU can be used to implement the transmission and reception of radio frequency signals. The CU and DU can be two independent RAN nodes, or they can be integrated into the same RAN node, such as in a baseband unit (BBU). The RU can be included in radio frequency equipment, such as a remote radio unit (RRU) or an active antenna unit (AAU). The CU can be further divided into two types of RAN nodes: CU-control plane and CU-user plane.

[0086] In different systems, RAN nodes may have different names. For example, in an O-RAN system, a CU may be called an open CU (O-CU), a DU may be called an open DU (O-DU), and a RU may be called an open RU (O-RU). The RAN node in the embodiments of the present application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module. For example, the RAN node may be a server loaded with the corresponding software module. The embodiments of the present application do not limit the specific technology and specific device form adopted by the RAN node. For ease of description, the following description takes a base station as an example of a RAN node.

[0087] A terminal is a device with wireless transceiver capabilities that can send signals to a base station or receive signals from a base station. A terminal may also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city, etc. A terminal can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, wearable device, vehicle, airplane, ship, robot, robotic arm, smart home device, etc. The embodiments of this application do not limit the specific technology and specific device form adopted by the terminal.

[0088] Base stations and terminals can be fixed or mobile. They can be deployed on land, indoors or outdoors, handheld or vehicle-mounted; on water; or on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of base stations and terminals.

[0089] The roles of base stations and terminals can be relative. For example, the helicopter or drone 120i in Figure 1 can be configured as a mobile base station. To terminals 120j accessing the wireless access network 100 via 120i, terminal 120i is a base station. However, to base station 110a, 120i is a terminal, meaning that communication between 110a and 120i occurs via a wireless air interface protocol. Of course, communication between 110a and 120i can also occur via a base station-to-base station interface protocol. In this case, 120i is also a base station relative to 110a. Therefore, base stations and terminals can be collectively referred to as communication devices. 110a and 110b in Figure 1 can be referred to as communication devices with base station functionality, while 120a-120j in Figure 1 can be referred to as communication devices with terminal functionality.

[0090] Communication between base stations and terminals, between base stations, and between terminals can be carried out through authorized spectrum, unauthorized spectrum, or both; communication can be carried out through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0091] In the embodiments of the present application, the functions of the base station may also be performed by a module (such as a chip) in the base station, or by a control subsystem that includes the base station functions. The control subsystem that includes the base station functions here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, smart transportation, and smart city. The functions of the terminal may also be performed by a module (such as a chip or modem) in the terminal, or by a device that includes the terminal functions.

[0092] In this application, a base station sends downlink signals or downlink information to a terminal, and the downlink information is carried on a downlink channel; the terminal sends uplink signals or uplink information to the base station, and the uplink information is carried on an uplink channel. In order to communicate with the base station, the terminal needs to establish a wireless connection in the cell controlled by the base station. The cell with which the terminal has established a wireless connection is called the serving cell of the terminal. When the terminal communicates with the serving cell, it will also be interfered with by signals from neighboring cells.

[0093] In the embodiments of the present application, the time domain symbols may be orthogonal frequency division multiplexing (OFDM) symbols or discrete Fourier transform-spread OFDM (DFT-s-OFDM) symbols. Unless otherwise specified, the symbols in the embodiments of the present application refer to time domain symbols.

[0094] 2. Dynamic spectrum access (DSS):

[0095] DSS can achieve smooth evolution between different wireless access technologies. For example, dynamic spectrum sharing can transmit LTE and NR data in the same frequency band through frequency division multiplexing or time division multiplexing. The frequency bands of NR include FR1 and FR2. FR1 includes C-band (4-8 GHz), and FR2 includes frequency bands above 6 GHz, such as millimeter wave bands. Due to the poor coverage of high-frequency bands, NR needs to use some low-frequency bands of LTE for communication to ensure coverage requirements. For example, according to the traffic volume of 4G and 5G, dynamic resource allocation can be achieved at the millisecond level in the time domain and at the resource block (RB) level in the frequency domain.

[0096] In order to make 4G and 5G use spectrum resources more efficiently on the same carrier, technologies such as rate matching technology (RB-level rate matching or resource element (RE)-level rate matching), redesigning the time domain position of the NR synchronization signal block (synchronization signal / PBCH (Physical Broadcast Channel) block, SSB), and changing the time domain position of the NR demodulation reference signal (DMRS) can be adopted. For example, when LTE and NR share spectrum, LTE will always send the downlink cell reference signal (CRS). Therefore, to avoid the channel and signal in NR from conflicting with the CRS resources, the NR downlink signal (such as the demodulation reference signal (DMRS)) cannot conflict with the LTE CRS. For example, if the DMRS symbol conflicts with the CRS, it must be relocated to other symbols.

[0097] 3. Demodulation Reference Signal DMRS:

[0098] (1) Meaning of DMRS:

[0099] DMRS is used for channel estimation during physical downlink shared channel (PDSCH) demodulation. Based on the symbols occupied by DMRS, it can be divided into front-loaded (FL) DMRS and additional (Add) DMRS. Front-loaded DMRS must be configured by default and occupies one or two symbols before PDSCH. The design of front-loaded DMRS places DMRS in front of the data, which helps the system reduce processing latency. For example, it allows the receiver to perform channel estimation earlier. Once the receiver obtains the channel estimate, regardless of whether the transmission is completed, it can immediately perform correlation demodulation on the buffered received data, without having to receive and buffer all the data before processing. Additional DMRS supports up to three groups of positions (pos1 to pos3), and the number of symbols in each group of additional DMRS is the same as the number of symbols in the front-loaded DMRS.

[0100] Existing protocols classify DMRS into DMRS Type 1 and DMRS Type 2 based on the maximum number of antenna ports (also referred to as ports) supported by DMRS. Specifically, Type 1 and Type 2 are divided into single-symbol Type 1 and Type 2, and dual-symbol Type 1 and Type 2. For example, Figure 2 shows a schematic diagram of single-symbol DMRS, and Figure 3 shows a schematic diagram of dual-symbol DMRS. For DMRS Type 1, a single symbol supports a maximum of 4 antenna ports (4 ports), and a dual symbol supports a maximum of 8 ports. For DMRS Type 2, a single symbol supports a maximum of 6 ports, and a dual symbol supports a maximum of 12 ports. The pilot density is the number of REs used to transmit DMRS per RB divided by the number of antenna ports formed by the REs. For example, if each RB has 4 REs used to transmit DMRS, and these 4 REs form 4 antenna ports using a frequency division orthogonal covering code (FD-OCC), the pilot density is 4 / 4 = 1. It can be deduced that the pilot density of Type 1 is 3RE / port / RB, and the pilot density of Type 2 is 2RE / port / RB, that is, the pilot density of Type 1 is greater than that of Type 2, so the channel estimation performance of Type 1 is better than that of Type 2; NR downlink supports symbol sharing of data and DMRS, so the DMRS overhead of Type 2 is smaller. Optionally, the symbol type (Type1 / 2, single / double symbol number) of each group of additional DMRS is consistent with the preceding DMRS, that is, if the preceding symbol is a Type 1 single symbol, the additional symbol is also a Type 1 single symbol. Optionally, the existing protocol also defines the relevant position of PDSCH DMRS, as well as the time domain position of single-symbol DMRS, the time domain position of double-symbol DMRS, etc., which are not limited in this application.

[0101] (2) Antenna port:

[0102] The channels of the same antenna port can be considered to be the same in a short period of time (the channel has no time to change). Each antenna port corresponds to a resource grid in the time domain and frequency domain resources. As the number of antennas increases, the base station and UE can support more layers of spatial division multiplexing, and therefore support more antenna ports. For example, multiple antenna ports are realized by orthogonal multiplexing of multiple single antenna ports on multiple RE resources. Orthogonal multiplexing includes, for example, frequency division multiplexing (FDM), time division multiplexing (TDM), and code division multiplexing (CDM). Therefore, the signals of the same DMRS resource at different antenna ports can be mutually orthogonal.

[0103] For example, Figure 4 is a schematic diagram of multiple antenna ports and corresponding resource grids. Assuming that there are two antenna ports (such as the first antenna port and the second antenna port), there are two resource grids in the same frequency domain position (such as the first RE and the second RE). If the reference signals of the two antenna ports are realized only by frequency division multiplexing, for example, the first antenna port sends a reference signal (RS) on the first RE, and does not send RS in the second RE adjacent to the frequency domain, and the second antenna port sends RS on the second RE, and does not send RS in the first RE; this can avoid interference between RS signals of different antenna ports, that is, orthogonality is achieved through FDM. Optionally, achieving orthogonality through TDM is also similar, such as the first RE and the second RE are on different orthogonal frequency division multiplexing (OFDM) symbols, which is not limited in this application.

[0104] Optionally, CDM includes CDM on time domain resources, CDM on frequency domain resources, joint CDM in frequency domain and time domain, etc. For example, if code division multiplexing is used to implement the RS of two antenna ports, the two antenna ports send the same RS sequence in the first RE and the second RE respectively, but they are multiplied by different OCCs, and the RS of the two antenna ports are distinguished by the OCC. For example, Figure 5 is a schematic diagram of multiple resource grids and corresponding different OCCs. Assuming that different OCCs can be expressed as a sequence of [1,1] and a sequence of [1,-1], the RS signals on the two REs of the first antenna port are multiplied by the sequence of [1,1], and the signals on the two REs of the second antenna port are multiplied by the sequence of [1,-1]. In this way, RS signals can be sent simultaneously on the two REs of the two antenna ports without interfering with each other, which can improve the performance of data transmission.

[0105] (3) DMRS sequence generation:

[0106] The DMRS sequence is a pseudo-noise (PN) sequence, also known as a pseudo-random sequence, which is composed of a pseudo-random sequence c(i). The pseudo-random sequence c(i), also known as a Gold sequence, is composed of two m sequences. For example, assuming that the DMRS sequence is represented by r(n), the relationship between r(n) and c(i) satisfies formula (1):

[0107] Wherein, c(2n) and c(2n+1) represent the odd and even parts of the pseudo-random sequence, and the pseudo-random sequence is composed of two m-sequences. For example, the pseudo-random sequence c(n) and the two m-sequences x1(n) and x2(n) satisfy formulas (2) to (4): c(n) = (x1(n+N c )+x2(n+N c ))mod2 (2) x1(n+31)=(x1(n+3)+x1(n))mod2 (3) x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod2 (4)

[0108] The first 31 sequence values ​​of each m-sequence are initialized, and these initial 31 sequence values ​​determine the entire m-sequence. The initialization sequence for x1(n) is fixed and defined by the standard. The initialization value for x2(n) depends on the time-domain position of the OFDM symbol in which the sequence resides and the scrambling code identity (ID). The sequence values ​​for c(n), x1(n), and x2(n) are all natural numbers, while the sequence value for r(n) is a complex number.

[0109] (4) DMRS resource mapping:

[0110] The high-level parameters configure the DMRS type (e.g., Type 1 or Type 2). The mapping of DMRS sequence values ​​to physical resources satisfies formulas (5) to (9): k′=0,1 (7) n=0,1,… (9)

[0111] Where k represents the frequency domain resource index of RE, the frequency domain unit is subcarrier, and the initial counting reference point of k is specified by the protocol; l represents the time domain resource index of RE, and the time domain unit is OFDM symbol. r(2n+k′) represents the pseudo-random sequence value corresponding to RE resource (k, l). Indicates the power scaling factor. w f (k′)w t (l') represents the OCC value multiplied by the DMRS sequence value.f (k′), w t (l′) and Δ are respectively determined by tables in the standard. For example, for Type 1, the parameters of PDSCH configuration type 1 are shown in Table 1.

[0112] Table 1: Parameter table of PDSCH configuration type 1.

[0113] For another example, for Type 2, the parameters of PDSCH configuration type 2 are shown in Table 2.

[0114] Table 2: Parameter table of PDSCH configuration type 2.

[0115] Here, p represents the antenna port number, and the same Δ value indicates the same CDM group. For single-symbol DMRS, l' takes the value of 0; for dual-symbol DMRS, l' takes the value of 0 or 1. For each antenna port, k' takes the value of 0 or 1, indicating that an OCC of length 2 is used in the frequency domain. For dual-symbol DMRS, in addition to the frequency-domain OCC of length 2 (FD-OCC 2), there is also a time-domain OCC of length 2 (TD-OCC 2). For example, for Type 1 single-symbol DMRS, there are 2 CDM groups and 4 antenna ports. The time-frequency distribution of different antenna ports in one RB is shown in Figure 6. For another example, for Type 1 dual-symbol, there are 8 antenna ports; assume that CDM0 contains 4 antenna ports (p0, p1, p4, p5) and CDM1 contains 4 antenna ports (p2, p3, p6, p7). For dual-symbol, in addition to OCC2 in the frequency domain, there is also OCC2 in the time domain. It can be considered that the time domain OCC2 superimposed on the frequency domain OCC2 forms an OCC with a length of 4. The time-frequency distribution of different antenna ports is shown in Figure 7. Optionally, for Type 2 single-symbol or dual-symbol DMRS, the specific implementation is similar to Figures 6 and 7. For example, for Type 2 single-symbol, there are 3 CDM groups, each of which implements 2 antenna ports through FD-OCC 2; or for Type 2 dual-symbol, there are 3 CDM groups, each of which implements 4 antenna ports through FD-OCC 2 and TD-OCC 2. This will not be repeated here.

[0116] (5) DMRS enhancement:

[0117] The current standard protocol has enhanced DMRS, primarily increasing the frequency domain OCC length from 2 to 4, and the corresponding increase in the number of antenna ports. For example, Table 3 includes the corresponding DMRS parameters for different evolution versions (R15-R18) of the current 3GPP standard protocol.

[0118] Table 3: DMRS enhancement

[0119] It can be seen that the maximum number of antenna ports for Type 1 DMRS increases from 4 antenna ports for a single symbol to 8 antenna ports, and from 8 antenna ports for a dual symbol to 16 antenna ports; the maximum number of antenna ports for Type 2 DMRS increases from 6 antenna ports for a single symbol to 12 antenna ports, and from 12 antenna ports for a dual symbol to 24 antenna ports. However, the 6G era supports higher multi-antenna specifications, will support higher data rates, and will need to support more spatial layers. Therefore, how to design 6G DMRS resource patterns and sequences, increase the number of DMRS antenna ports, and be backward compatible with 5G DMRS, so as to reduce DMRS overhead in 5G-6G DSS scenarios, realize 5G and 6G multi-user MIMO spatial division multiplexing, and improve spectrum sharing efficiency has become a problem to be solved. The communication method provided in this application designs a DMRS resource pattern suitable for 6G, which can reduce DMRS overhead and improve spectrum sharing efficiency in dynamic spectrum sharing scenarios of different wireless access technologies.

[0120] 2. Communication method provided by this application:

[0121] For example, Figure 8 is a flow chart of a communication method provided by this application. The method can be implemented by interaction between a first device and a second device, where the first device is, for example, a terminal or a device of a terminal, and the second device is, for example, a network device or a device of a network device. The method includes the following steps:

[0122] S101, a second device sends first configuration information of a first radio access technology to a first device; correspondingly, the first device receives the first configuration information.

[0123] S102, the second device sends first indication information to the first device; correspondingly, the first device receives the first indication information.

[0124] Among them, the first configuration information is used to configure the first resource pattern, and the first resource pattern includes P antenna ports, where P is a positive integer. For example, assuming that the first wireless access technology is 6G, the first resource pattern is the frequency domain resource mapping pattern of the possible PDSCH DMRS of 6G. For example, for Type 1, the present application can implement Type 1 single symbol to support a maximum of 12 or 16 ports (that is, Type 1 single symbol supports a maximum of P = 12 or 16), and double symbols to support a maximum of 24 or 32 ports (that is, Type 1 double symbols support a maximum of P = 24 or 32). For another example, for Type 2, the present application can implement Type 2 single symbol to support a maximum of 24 ports (that is, Type 2 single symbol supports a maximum of P = 24), and Type 2 double symbols to support a maximum of 48 ports (that is, Type 2 double symbols support a maximum of P = 48). Optionally, the symbol refers to a time domain symbol, such as an OFDM symbol. It can be understood that the first resource pattern includes P antenna ports, which means that the first resource pattern includes resources of P antenna ports, or in other words, the first resource pattern is a resource mapping pattern of P antenna ports.

[0125] The first indication information is used to indicate P1 antenna ports among the P antenna ports, and P1 is a positive integer less than P. For example, assuming that a Type 1 single symbol supports a maximum of 12 antenna ports (P=12), the first indication information is used to indicate 3 antenna ports among the 12 antenna ports (P1=3).

[0126] Optionally, the resources of the P1 antenna port and the resources of the P2 antenna ports included in the second resource pattern are mutually orthogonal; wherein P2 and P1 are positive integers, and P2 is less than P, and P1 is less than P. For example, the DMRS resources of the P1 antenna port and the DMRS resources of the P2 antenna port are mutually orthogonal, and a specific implementation method includes: the DMRS resources of the P1 antenna port and the DMRS resources of the P2 antenna port are located at different frequency domain positions, and / or, the DMRS resources of the P1 antenna port and the DMRS resources of the P2 antenna port are located at different time domain positions, and / or, the DMRS resources of the P1 antenna port and the DMRS resources of the P2 antenna port are located at the same time-frequency position and correspond to different OCCs.

[0127] Optionally, the P antenna ports further include P3 antenna ports, and resources of the P3 antenna ports are not orthogonal to resources of the P2 antenna ports; where P3 is a positive integer and is less than P. For example, the DMRS resources of the P1 antenna port are not orthogonal to the DMRS resources of the P3 antenna port. A specific implementation method includes: the DMRS resources of the P3 antenna port and the DMRS resources of the P2 antenna port are partially or completely located at the same time-frequency position, and the corresponding DMRS sequences are not orthogonal, for example, the lengths of the corresponding OCCs are different.

[0128] Optionally, the second resource pattern is applicable to a second radio access technology, and the first radio access technology and the second radio access technology are different. For example, the first radio access technology is a radio access technology evolved from the second radio access technology, and the second radio access technology may be, for example, 5G, and the first radio access technology may be 6G, or a further evolved communication technology (such as 7G) in the future.

[0129] The following describes in detail possible implementations of the first resource pattern.

[0130] (1) Assume that the frequency domain of the first resource pattern contains one or more OCCs and / or a greater number of CDM groups, and different CDM groups are multiplexed using FDM.

[0131] Implementation method 1: A single DMRS symbol includes six CDM groups, and the frequency domain OCC length of each CDM group is 2. Each CDM group has two REs for DMRS in each RB, and different CDM groups are multiplexed using FDM.

[0132] Optionally, the first resource pattern includes six code division multiplexing groups, the first resource pattern includes a first resource block, and the first resource block includes multiple resource units. Wherein, any code division multiplexing in each code division multiplexing group includes two resource units, the two resource units are non-adjacent and separated by one resource unit, or the two resource units are non-adjacent and separated by five resource units.

[0133] For example, Figure 9 is a schematic diagram of a first resource pattern provided by this application, showing the CDM distribution in a resource block and the antenna ports included in each CDM group. The left part of Figure 9 corresponds to option 1, and the right part of Figure 9 corresponds to option 2.

[0134] Option 1: The first resource pattern includes six code division multiplexing groups. Each code division multiplexing group corresponds to two independent antenna ports, and any code division multiplexing in each code division multiplexing group includes two resource units. The two resource units use a frequency domain OCC with a length of 2. The two resource units belong to the same resource block, and the two resource units are numbered as k, k+2, where k is an integer greater than or equal to 0. It can be understood that Figure 9 only shows the CDM distribution of the first resource pattern in one resource block. The first resource pattern can also include multiple resource blocks. The CDM distribution in each resource block is the same as Figure 9. Then each CDM group includes the corresponding CDM in multiple resource blocks.

[0135] For example, the entire left portion of FIG9 is regarded as one RB. Assuming k=0, one RB includes REs numbered 0-11 (each RE is shown as a block in FIG9 ). Among them, the REs numbered 0 and 2 in the first RB (such as the REs shaded by diagonal lines in Figure 9) belong to the first code division multiplexing group (such as CDM#0 in Figure 9), the REs numbered 1 and 3 in the first RB (such as the REs shaded by horizontal lines in Figure 9) belong to the second code division multiplexing group (such as CDM#1 in Figure 9), the REs numbered 4 and 6 in the first RB (such as the REs shaded by cross lines in Figure 9) belong to the third code division multiplexing group (such as CDM#2 in Figure 9), the REs numbered 5 and 7 in the first RB (such as the REs shaded by vertical lines in Figure 9) belong to the fourth code division multiplexing group (such as CDM#3 in Figure 9), the REs numbered 8 and 10 in the first RB (such as the REs shaded by square lines in Figure 9) belong to the fifth code division multiplexing group (CDM#4 in Figure 9), and the REs numbered 9 and 11 in the first RB (such as the REs shaded by spot lines in Figure 9) belong to the sixth code division multiplexing group (such as CDM#5 in Figure 9). It can be seen that in option 1, the two REs used for sending DMRS in each RB of each antenna port are not adjacent, and there is 1 RE between the two REs (that is, the difference between the two RE indices is 2).

[0136] Option 2: The first resource pattern includes six CDM groups. Each CDM group corresponds to two independent antenna ports. Each CDM in each CDM group includes two resource units. The two resource units use a frequency-domain OCC of length 2. The two resource units belong to the same resource block and are numbered k and k+6, respectively.

[0137] For example, the right part of FIG9 is considered as one RB as a whole. Assuming k=0, one RB includes REs numbered 0-11 (each RE is shown as a block in FIG9 ). Among them, REs numbered 0 and 6 in the first RB (REs shaded by diagonal lines in Figure 9) belong to the first code division multiplexing group (CDM#0 in Figure 9), REs numbered 1 and 7 in the first RB (REs shaded by horizontal lines in Figure 9) belong to the second code division multiplexing group (CDM#1 in Figure 9), REs numbered 2 and 8 in the first RB (REs shaded by cross lines in Figure 9) belong to the third code division multiplexing group (CDM#2 in Figure 9), REs numbered 3 and 9 in the first RB (REs shaded by vertical lines in Figure 9) belong to the fourth code division multiplexing group (CDM#3 in Figure 9), REs numbered 4 and 10 in the first RB (REs shaded by square grids in Figure 9) belong to the fifth code division multiplexing group (CDM#4 in Figure 9), and REs numbered 5 and 11 in the first RB (REs shaded by spot shadows in Figure 9) belong to the sixth code division multiplexing group (CDM#5 in Figure 9). It can be seen that in option 2, the two REs used for sending DMRS in each RB of each antenna port are not adjacent, and the two REs are separated by 5 REs (that is, the difference between the two RE indices is 6).

[0138] Optionally, regardless of Option 1 or Option 2 above, the relative positions of DMRS REs in different RBs are the same. For example, the first resource pattern is assumed to include multiple first resource blocks (multiple RBs), and the resource elements and CDM groups in each first resource block are arranged in the same manner, that is, the pattern of each RB is shown in Figure 9.

[0139] Optionally, the DMRS sequence in the present application is still a pseudo-random sequence, refer to the above formula (1).

[0140] Optional, for option 1, pseudo-random sequence r(m) to DMRS resource unit (k, l) p,μ The mapping relationship is shown in the following formula (10), where the corresponding relationship between the value of the parameter Δ and the CDM group number is shown in Table 4: k=12n+2k′+Δ (11) k′=0,1 (12) n=0,1,… (14)

[0141] Table 4: Option 1, single symbol CDM group number and parameter Δ

[0142] The meaning of the parameters in the above formula can be referred to the description in formula (5) to formula (9), which will not be repeated here. The sequence r(x) in formula (10) is called the DMRS base sequence. The DMRS base sequence is multiplied by the orthogonal superposition code w f (k′)w t(l′), power amplifier factor After that, the DMRS sequence is generated.

[0143] Optionally, the CDM group numbers in Table 4 are only used as examples to indicate that different CDM groups correspond to different Δ values.

[0144] Optionally, the DMRS base sequence r(x) in formula (10) is implemented as: r(x) = r(2n+k′). The DMRS base sequence r(2n+k′) determined in this way is different from the DMRS base sequence determined by R15, and the resulting DMRS sequence is non-orthogonal or pseudo-orthogonal in the same time-frequency resources.

[0145] Optionally, the DMRS base sequence r(x) in formula (10) is implemented as follows: in, Indicates that w is rounded down. For example, The DMRS base sequence determined in this way can ensure that it is the same as the DMRS base sequence determined by R15 in the same time-frequency resources, so the DMRS sequence can be orthogonal after applying OCC.

[0146] Optionally, for option 2, the pseudo-random sequence r(m) to the DMRS resource unit (k, l) p,μ The mapping relationship is shown in the following formula (15), where the corresponding relationship between the value of the parameter Δ and the CDM group number is shown in Table 5: k=12n+6k′+Δ (16) k′=0,1 (17) n=0,1,… (19)

[0147] Table 5: Option 2, single symbol CDM group number and parameter Δ

[0148] Optionally, the DMRS base sequence r(x) in formula (15) is implemented as follows: r(x)=r(2n+k′).

[0149] Optionally, according to the pilot density derivation process described above, the second device may determine that the DMRS pilot density in the first implementation is: 1RE / port / RB.

[0150] Optionally, regardless of Option 1 or Option 2 above, the correspondence between each CDM group and the antenna port is shown in Figure 9. For example, CDM#0 corresponds to antenna ports 0 and 1 (p0, p1), CDM#1 corresponds to antenna ports 2 and 3 (p2, p3), CDM#2 corresponds to antenna ports 8 and 9 (p8, p9), CDM#3 corresponds to antenna ports 10 and 11 (p10, p11), CDM#4 corresponds to antenna ports 16 and 17 (p16, p17), and CDM#5 corresponds to antenna ports 18 and 19 (p18, p19).

[0151] Optionally, the resources of the P1 antenna ports in the first implementation (assuming that they are resources of the antenna ports of release 20 (R20)) and the resources of the P2 antenna ports of the existing 5G (such as resources of the antenna ports of release 15 (R15) or release 18 (R18)) can be orthogonal to each other. For example, for the above-mentioned option one, Figure 10 is a schematic diagram of antenna ports and antenna port resources of R15, R18 and R20 provided by this application. Among them, the length of the frequency domain OCC of R15 is 2 (FD-OCC 2), the length of the frequency domain OCC of R18 is 4 (FD-OCC 4), and the length of the frequency domain OCC of R20 is 2 (FD-OCC 2). Figure 10 only shows the resources of some antenna ports (for example, the case where the resources of two antenna ports in different versions overlap). If the resources of the two antenna ports do not overlap, orthogonality can be achieved through FDM, and spatial division multiplexing of different wireless access technologies can be achieved. It can be seen that for R15 and R20, the two antenna ports of R15 (ie, P2=2) and the six antenna ports of R20 (ie, P1=6) are orthogonal to each other, as shown in Table 6.

[0152] Table 6: List of mutually orthogonal antenna ports for R15 and R20.

[0153] For example, Case 1 in Table 6 indicates that p0 of R15 is orthogonal to p1, p9, and p17 of R20 (specifically, p0 is orthogonal to p1, and / or p0 is orthogonal to p9, and / or p0 is orthogonal to p17), and Case 2 indicates that p1 of R15 is orthogonal to p0, p8, and p16 of R20 (specifically, p1 is orthogonal to p0, and / or p1 is orthogonal to p8, and / or p1 is orthogonal to p16). Optionally, 1 and -1 in FIG10 indicate OCC values. For example, the OCC corresponding to p0 in R15 is (1, 1), and the OCC corresponding to p1 is (1, -1). Similarly, the OCC corresponding to p0, p8, and p16 in R20 is (1, 1), and the OCC corresponding to p1, p9, and p17 is (1, -1).

[0154] For another example, for option 2 above, Figure 11 is a schematic diagram of another antenna port and antenna port resources of R15, R18 and R20 provided by this application. Among them, the length of the frequency domain OCC of R15 is 2 (FD-OCC 2), the length of the frequency domain OCC of R18 is 4 (FD-OCC 4), and the length of the frequency domain OCC of R20 is 2 (FD-OCC 2). Figure 11 only shows the resources of some antenna ports (for example, the case where the resources of two antenna ports in different versions overlap). If the resources of the two antenna ports do not overlap, orthogonality can be achieved through FDM, and spatial division multiplexing of different wireless access technologies can be achieved. It can be seen that in option 2 in Figure 11, the resources of the antenna ports of R15 and R20 are not orthogonal, and the resources of the antenna ports of R18 and R20 are not orthogonal.

[0155] In this implementation method one, whether the solution of option one or option two is adopted, the pilot density is lower than that of R15 or R18, which is conducive to reducing DMRS resource overhead; and the DMRS resource pattern is compatible with the 5G DMRS resource pattern, and can realize spatial division multiplexing of 5G and 6G PDSCH data without increasing the reference signal overhead. Optionally, the solution of option one is applicable to antenna ports with overlapping resources, and is orthogonal to the antenna ports of R15, thereby realizing more flexible spatial division scheduling between 5G and 6G terminals. In addition, the frequency domain OCC span is small (3 REs), which is suitable for scenarios with large delay spread. Optionally, in the solution of option two, the DMRS distribution of each antenna port in the frequency domain is more uniform, and better channel estimation performance can be obtained under appropriate delay spread.

[0156] Implementation method 2: A single DMRS symbol includes four CDM groups and two frequency-domain OCC lengths: FD-OCC 2 and FD-OCC 4. Assume that the first or second CDM group corresponds to FD-OCC 4 (each CDM group has four REs used for DMRS in each RB), and the third and fourth CDM groups correspond to FD-OCC 2 (each CDM group has two REs used for DMRS in each RB). Different CDM groups are multiplexed using FDM.

[0157] Optionally, the first resource pattern includes four code division multiplexing groups. The first resource pattern includes an adjacent first resource block and a second resource block, and the first resource block and the second resource block both include multiple resource units. Among them, the even-numbered resource units in the first resource block and the second resource block belong to the first code division multiplexing group and the third code division multiplexing group of the four code division multiplexing groups; the first code division multiplexing group and the third code division multiplexing group are different, the four resource units of any code division multiplexing in the first code division multiplexing group and the two resource units of any code division multiplexing in the third code division multiplexing group are different, the four resource units are non-adjacent and are separated by one resource unit respectively, and the two resource units are non-adjacent and are separated by one resource unit. The odd-numbered resource units in the first resource block and the second resource block belong to the second and fourth code division multiplexing groups of the four code division multiplexing groups; the second code division multiplexing group and the fourth code division multiplexing group are different; the four resource units of any code division multiplexing in the second code division multiplexing group and the two resource units of any code division multiplexing in the fourth code division multiplexing group are different; the four resource units are non-adjacent and are separated by one resource unit respectively; and the two resource units are non-adjacent and are separated by one resource unit. The resource pattern corresponding to the first resource block is the same as the resource pattern corresponding to the second resource block; or, the resource pattern corresponding to the first resource block is the frequency-domain flip of the resource pattern corresponding to the second resource block.

[0158] For example, Figure 12 is a schematic diagram of the CDM distribution of another first resource pattern provided by the present application in a resource block and the antenna ports included in each CDM group. The left part of Figure 12 corresponds to option one, and the right part of Figure 12 corresponds to option two. It can be understood that, in order from bottom to top, every 12 REs correspond to one RB; the resource pattern corresponding to the first resource block in the left part of Figure 12 is the same as the resource pattern corresponding to the second resource block; the resource pattern corresponding to the first resource block in the right part of Figure 12 is the flip of the resource pattern corresponding to the second resource pattern in the frequency domain (symmetrical up and down).

[0159] Specifically, the first resource pattern includes four code division multiplexing groups. Among them, the first code division multiplexing group and the second code division multiplexing group of the four code division multiplexing groups correspond to 4 independent antenna ports respectively, the first code division multiplexing group and the second code division multiplexing group are different, any code division multiplexing in the first code division multiplexing group and the second code division multiplexing group includes 4 resource units, the 4 resource units use a frequency domain OCC with a length of 4, the 4 resource units belong to the first resource block, and the 4 resource units are numbered: k, k+2, k+4, k+6, k is an integer greater than or equal to 0; the third code division multiplexing group and the fourth code division multiplexing group of the four code division multiplexing groups correspond to 2 independent antenna ports respectively, the third code division multiplexing group and the fourth code division multiplexing group are different, any code division multiplexing in the third code division multiplexing group and the fourth code division multiplexing group includes 2 resource units, the 2 resource units use a frequency domain OCC with a length of 2, the 2 resource units belong to the second resource block, and the 2 resource units are numbered: r, r+2, r is an integer greater than or equal to 0.

[0160] Option 1: Assume that the number of the first code division multiplexing group satisfies k = 0, the number of the second code division multiplexing group satisfies k = 1, the number of the third code division multiplexing group satisfies r = 8, and the number of the fourth code division multiplexing group satisfies r = 9. For example, the left portion of Figure 12 entirely includes a first RB and an adjacent second RB, the first RB includes REs numbered 0-11, and the second RB includes REs numbered 0-11 (each RE is represented by a block in Figure 12). Among them, the REs numbered 0, 2, 4, 6 in the first RB and the REs numbered 0, 2, 4, 6 in the second RB (such as the REs with oblique line shadows in Figure 12) belong to the first code division multiplexing group (such as CDM#0 in Figure 12), the REs numbered 1, 3, 5, 7 in the first RB and the REs numbered 1, 3, 5, 7 in the second RB (such as the REs with cross line shadows in Figure 12) belong to the second code division multiplexing group (such as CDM#1 in Figure 12), the REs numbered 8, 10 in the first RB and the REs numbered 8 and 10 in the second RB (such as the REs with square shadows in Figure 12) belong to the third code division multiplexing group (such as CDM#2 in Figure 12), and the REs numbered 9, 11 in the first RB and the REs numbered 9 and 11 in the second RB (such as the REs with horizontal line shadows in Figure 12) belong to the fourth code division multiplexing group (such as CDM#3 in Figure 12). It can be seen that in option 1, the two REs used for sending DMRS in each RB of each antenna port are not adjacent, and there is 1 RE between the two REs (that is, the difference between the two RE indices is 2).

[0161] Option 2: Assume that the number of the first code division multiplexing group satisfies k=0, the number of the second code division multiplexing group satisfies k=1, the number of the third code division multiplexing group satisfies r=0 or 8, and the number of the fourth code division multiplexing group satisfies r=1 or 9. For example, the right portion of Figure 12 entirely includes a first RB and an adjacent second RB, the first RB includes REs numbered 0-11, and the second RB includes REs numbered 0-11 (each RE is shown as a block in Figure 12). Among them, the REs numbered 0, 2, 4, 6 in the first RB and numbered 4, 6, 8, and 10 in the second RB (such as the REs with oblique line shadows in Figure 12) belong to the first code division multiplexing group (such as CDM#0 in Figure 12), the REs numbered 1, 3, 5, 7 in the first RB and numbered 5, 7, 9, and 11 in the second RB (such as the REs with cross line shadows in Figure 12) belong to the second code division multiplexing group (such as CDM#1 in Figure 12), the REs numbered 8 and 10 in the first RB and numbered 0 and 2 in the second RB (such as the REs with square shadows in Figure 12) belong to the third code division multiplexing group (such as CDM#2 in Figure 12), and the REs numbered 9 and 11 in the first RB and numbered 1 and 3 in the second RB (such as the REs with horizontal line shadows in Figure 12) belong to the fourth code division multiplexing group (such as CDM#3 in Figure 12). It can be seen that in option 2, the two REs used for sending DMRS in each RB of each antenna port are not adjacent, and there is 1 RE between the two REs (that is, the difference between the two RE indices is 2).

[0162] Optionally, according to the pilot density derivation process described above, the second device can determine that in the second implementation method, the first CDM group and the second CDM group have 4 REs in each RB for DMRS, and the DMRS pilot density is: 1RE / port / RB; the third CDM group and the fourth CDM group have 2 REs in each RB for DMRS, and the DMRS pilot density is: 1RE / port / RB.

[0163] Optionally, regardless of Option 1 or Option 2, the correspondence between each CDM group and antenna port is the same. For example, CDM#0 corresponds to antenna ports 0, 1, 8, and 9 (p0, p1, p8, p9), CDM#1 corresponds to antenna ports 2, 3, 10, and 11 (p2, p3, p10, p11), CDM#2 corresponds to antenna ports 16 and 17 (p16, p17), and CDM#3 corresponds to antenna ports 18 and 19 (p18, p19).

[0164] Optionally, the resources of the P1 antenna ports in the second implementation method (the resources of the P1 antenna port of R20) and the resources of the P2 antenna ports of R15 or R18 can be orthogonal to each other. For example, for the above-mentioned option one, Figure 13 is a schematic diagram of another antenna port of R15, R18 and R20 and the resources of the antenna ports provided by this application. Among them, the length of the frequency domain OCC of R15 is 2 (FD-OCC 2), the length of the frequency domain OCC of R18 is 4 (FD-OCC 4), and the length of the frequency domain OCC of R20 is 2 and / or 4 (FD-OCC 2 or FD-OCC 4). Figure 13 only shows the resources of some antenna ports (for example, the resources of two antenna ports in different versions overlap). If the resources of the two antenna ports do not overlap, orthogonality can be achieved through FDM, and spatial division multiplexing of different wireless access technologies can be achieved. It can be seen that for R15 and R20, the two antenna ports of R15 (ie, P2=2) and the four antenna ports of R20 (ie, P1=4) are orthogonal to each other, as shown in Table 7.

[0165] Table 7: List of mutually orthogonal antenna ports for R15 and R20.

[0166] For example, Case 1 in Table 7 indicates that p0 of R15 and p1 and p17 of R20 are mutually orthogonal (specifically, p0 and p1, and / or, p0 and p17 are orthogonal), and Case 2 indicates that p1 of R15 and p0 and p16 of R20 are mutually orthogonal (specifically, p1 and p0, and / or, p1 and p16 are orthogonal). Optionally, 1 and -1 in Figure 13 represent OCC values. For example, the OCC corresponding to p0 in R15 is (1, 1), and the OCC corresponding to p1 is (1, -1). Similarly, the OCC corresponding to p0 and p16 in R20 is (1, 1), and the OCC corresponding to p1 and p17 is (1, -1). Optionally, in Option 1, the resources of the antenna ports of R18 and R20 are not orthogonal.

[0167] For another example, for option 2 above, FIG14 is a schematic diagram of another antenna port and antenna port resources of R15, R18 and R20 provided by this application. Among them, the length of the frequency domain OCC of R15 is 2 (FD-OCC 2), the length of the frequency domain OCC of R18 is 4 (FD-OCC 4), and the length of the frequency domain OCC of R20 is 2 and / or 4 (FD-OCC 2 or FD-OCC 4). FIG14 only shows the resources of some antenna ports (for example, the case where the resources of two antenna ports under different versions overlap). If the resources of the two antenna ports do not overlap, orthogonality can be achieved through FDM, and spatial division multiplexing of different wireless access technologies can be achieved. It can be seen that for R15, R18 and R20, the two antenna ports of R15 (i.e., P2=2), the four antenna ports of R18 (i.e., P2=4) may be orthogonal to each other with the six antenna ports of R20 (i.e., P1=6), as shown in Table 8.

[0168] Table 8: List of mutually orthogonal antenna ports for R15, R18, and R20.

[0169] For example, Case 1 in Table 8 indicates that p0 of R15 and p1, p17 of R20 are mutually orthogonal (specifically including p0 and p1, and / or, p0 and p17 are orthogonal), Case 2 indicates that p1 of R15 and p0, p16 of R20 are mutually orthogonal (specifically including p1 and p0, and / or, p1 and p16 are orthogonal), and other cases can be derived similarly and will not be repeated here. Optionally, Case 4 can be used in conjunction with Case 3. For example, p0 of R18 and (p1, p8, p9, p17) of R20 are mutually orthogonal. Optionally, in Case 4, p0 of R18 is only orthogonal to p17 of R20, and p1 of R18 is only orthogonal to p16 of R20.

[0170] Optionally, in Case 5, the sequence values ​​of R18 (p8, p9) and R20 (p16, p17) are mutually orthogonal. However, this is slightly different for the receiving modules of 5G and 6G terminals. 5G R18 terminals eliminate interference between orthogonal ports by deorthogonalizing according to the length of OCC4. Although the 6G p16 and p17 antenna ports implement OCC according to the length of OCC2, two adjacent OCC2s are actually equivalent to OCC4. Therefore, 5G R18 terminals can normally eliminate interference between the p16 and p17 antenna ports. However, for 6G terminals, the 6G terminals need to eliminate interference between the R18 p8 and p9 antenna ports by deorthogonalizing according to the length of OCC4 at the p16 and p17 antenna ports. That is to say, if the network schedules the spatial division multiplexing of p8 / p9 of R18 and p16 / p17 of R20, the 6G terminal needs to implement the interference elimination capability of channel estimation through the length of OCC4 on the antenna port of FD-OCC2.

[0171] In this second implementation, regardless of whether Option 1 or Option 2 is adopted, the number of DMRS antenna ports used to send DMRS is different, and more flexible resource allocation can be achieved according to the channel state and data rate. For example, when the channel state is good, the antenna port with a lower DMRS RE density is used to schedule the UE, and other REs that do not send DMRS can be used to transmit PDSCH data. When the channel state is poor, the antenna port with a higher DMRS RE density is used to schedule the UE to achieve better channel estimation performance. Optionally, in the Option 1 solution, the resource pattern of DMRS is the same on different RBs (for example, the first RB and the adjacent second RB); when scheduling data, the number of RBs for data scheduling may not be restricted (either odd or even). Optionally, in Option 2, the DMRS antenna ports of R20 include antenna ports that are orthogonal to the DMRS of R15, and antenna ports that are orthogonal to the DMRS of R18 (that is, antenna ports with overlapping resources). In addition, by implementing FDM of antenna ports with non-overlapping resources, R15, R18 and 6G terminals can be scheduled simultaneously to achieve more flexible spatial division multiplexing.

[0172] Implementation method three: The OCC lengths of the first RE resource set and the second RE resource set of the 6G terminal are different. Among them, the first RE resource set includes RE resources numbered with even numbers, and the second RE resource set includes RE resources numbered with odd numbers. The first RE resource set uses an OCC with a length greater than 4, such as FD-OCC 6, or FD-OCC 8, or FD-OCC 12, etc. The second RE resource set uses an OCC with a length of 2 and / or 4, such as FD-OCC 2 or FD-OCC 4. Optionally, since the first RE resource set uses an OCC with a length greater than 4, the first RE resource set is only used to send DMRS to the terminal of the first RAT (such as a 6G terminal) and cannot be shared with the terminal of the second RAT (such as a 5G terminal). Optionally, since the second RE resource set uses an OCC with a length of 2 and / or 4, the resources of the second RE resource set can be shared between the terminal of the first RAT and the terminal of the second RAT. Optionally, in implementation method three, the terminal of the first RAT supports at least two OCC lengths in a single symbol.

[0173] Optionally, the first resource pattern includes a first RE resource set and a second RE resource set, and the first resource pattern includes at least two code division multiplexing groups. The resource units of the first RE resource set belong to a first code division multiplexing group among the at least two code division multiplexing groups, and the length of the OCC of the first code division multiplexing group is greater than 4; the resource units of the second RE resource set belong to a second code division multiplexing group among the at least two code division multiplexing groups, and the length of the OCC of the second code division multiplexing group is 2 and / or 4.

[0174] In one possible implementation, assuming that the first RE resource set uses FD-OCC 6 and the length of the second RE resource set is 2 and / or 4, the implementation of the OCC length of the second RE resource set may include the following options:

[0175] Option 1: The second RE resource set uses FD-OCC 4. The resource units of the second RE resource set belong to a CDM group, which can achieve DMRS orthogonality of 6G and 5G R18.

[0176] Option 2: The second RE resource set uses FD-OCC 2. The resource units of the second RE resource set belong to a CDM group, which can achieve DMRS orthogonality of 6G and 5G R18.

[0177] Option 3: The second RE resource set adopts FD-OCC2. The resource units of the second RE resource set belong to three CDM groups, similar to the implementation method of Figure 9, which can achieve DMRS orthogonality of 6G and 5G R15.

[0178] Option 4: The second RE resource set adopts FD-OCC4. The resource units of the second RE resource set belong to two CDM groups, which can achieve DMRS orthogonality of 6G and 5G R18.

[0179] Option 5: The second RE resource set uses FD-OCC4 and FD-OCC2. The resource units of the second RE resource set belong to two CDM groups, similar to the implementation of Figure 12. This can achieve DMRS orthogonality between 6G and 5G R15, and / or DMRS orthogonality between 6G and 5G R18.

[0180] For example, Figure 15 is a schematic diagram of the CDM distribution of a first RE resource set and a second RE resource set and the antenna ports included in each CDM group provided by the present application. The left part of Figure 15 corresponds to option one, and the right part of Figure 15 corresponds to option two. It can be understood that, in order from bottom to top, every 12 REs correspond to one RB, then the first resource pattern of option one includes two RBs, and the first resource pattern of option two includes one RB. It can be seen that in the first resource pattern of option one, the resource elements of the first RE resource set belong to one CDM group and the first RE resource set adopts FD-OCC6; the resource elements of the second RE resource set belong to one CDM group and the second RE resource set adopts FD-OCC 4. In the first resource pattern of option two, the resource elements of the first RE resource set belong to one CDM group and the first RE resource set adopts FD-OCC6; the resource elements of the second RE resource set belong to one CDM group and the second RE resource set adopts FD-OCC 2.

[0181] Optionally, the first resource pattern of option one can also be described as: the first code division multiplexing group of the two code division multiplexing groups corresponds to 6 independent antenna ports, any code division multiplexing in the first code division multiplexing group includes 6 resource units, the 6 resource units use a frequency domain OCC with a length of 6, the 6 resource units belong to the same resource block, and the 6 resource units are numbered as follows: k, k+2, k+4, k+6, k+8, k+10, k is an integer greater than or equal to 0; the second code division multiplexing group of the two code division multiplexing groups corresponds to 4 independent antenna ports, any code division multiplexing in the second code division multiplexing group includes 4 resource units, the 4 resource units use the frequency domain OCC with a length of 4, the 4 resource units belong to the same resource block and the 4 resource units are numbered as: k+1, k+3, k+5, k+7, or the 4 resource units belong to two adjacent resource blocks in the frequency domain and the 4 resource units are numbered as k+9, k+11 of the first resource block and r+1, r+3 of the adjacent second resource block, where r is an integer greater than or equal to 0.

[0182] Optionally, the first resource pattern of option two can also be described as: the first code division multiplexing group of the two code division multiplexing groups corresponds to 6 independent antenna ports, any code division multiplexing in the first code division multiplexing group includes 6 resource units, the 6 resource units use a frequency domain OCC with a length of 6, the 6 resource units belong to the same resource block, and the 6 resource units are numbered as: k, k+2, k+4, k+6, k+8, k+10, k is an integer greater than or equal to 0; the second code division multiplexing group of the two code division multiplexing groups corresponds to 2 independent antenna ports, any code division multiplexing in the second code division multiplexing group includes 2 resource units, the 2 resource units use a frequency domain OCC with a length of 2, the 2 resource units belong to the same resource block and the 2 resource units are numbered as: r+1, r+3, r is an integer greater than or equal to 0.

[0183] Optionally, FIG15 only shows the above-mentioned options 1 and 2. Options 3 to 5 can refer to the implementation of FIG9, FIG12 and FIG15, which will not be repeated here.

[0184] Optionally, in this implementation, the first RE resource set can be further divided into multiple CDM groups to support a larger number of 6G DMRS antenna ports. Optionally, assuming that the first RE resource set uses FD-OCC 8 or FD-OCC 12, and the length of the second RE resource set is 2 and / or 4, the implementation of the OCC length of the second RE resource set can also include options 1 to 5 above. The specific implementation is not repeated here.

[0185] (2) Assume that the DMRS symbol of the first resource pattern includes more CDM groups and a lower pilot density, and different CDM groups are multiplexed using FDM. For Type 1, a single symbol supports 16 ports, and a double symbol supports 32 ports.

[0186] In one possible implementation, a single-symbol DMRS includes four CDM groups, each with a frequency-domain OCC length of 4. For example, a first resource pattern includes four code division multiplexing groups, each of which includes adjacent first and second resource blocks. Each code division multiplexing group corresponds to four resource units, and the four resource units are non-adjacent and separated by one resource unit.

[0187] Optionally, the first resource pattern in this implementation can also be described as: each code division multiplexing group corresponds to 4 independent antenna ports, any code division multiplexing in each code division multiplexing group includes 4 resource units, the 4 resource units use a frequency domain OCC with a length of 4, the 4 resource units belong to the same resource block or two adjacent resource blocks in the frequency domain, and the 4 resource units are numbered as: k, k+2, k+4, k+6, where k is an integer greater than or equal to 0. Optionally, when the 4 resource units belong to two adjacent resource blocks, the 4 resource units are numbered as: k+8, k+10 for the first resource block and r, r+2 for the adjacent second resource block, where r is an integer greater than or equal to 0.

[0188] For example, Figure 16 is a schematic diagram of the CDM distribution of a first resource pattern provided by the present application in a resource block, the antenna ports included in each CDM group, and the antenna ports of R15, R18 and R20 and the resources of the antenna ports. The left part of Figure 16 as a whole includes the first RB and the adjacent second RB, the first RB includes REs numbered 0-11, and the second RB includes REs numbered 0-11 (each RE is shown as a block in Figure 16). Assume that the number of the first code division multiplexing group satisfies k=0 or 4, the number of the second code division multiplexing group satisfies k=1 or 5, the number of the third code division multiplexing group satisfies r=0 or 8, and the number of the fourth code division multiplexing group satisfies r=1 or 9. Among them, the REs numbered 0, 2, 4, 6 in the first RB and numbered 4, 6, 8, and 10 in the second RB (such as the REs with oblique line shadows in Figure 16) belong to the first code division multiplexing group (such as CDM#0 in Figure 16), the REs numbered 1, 3, 5, 7 in the first RB and numbered 5, 7, 9, and 11 in the second RB (such as the REs with cross line shadows in Figure 16) belong to the second code division multiplexing group (such as CDM#1 in Figure 16), the REs numbered 8 and 10 in the first RB and numbered 0 and 2 in the second RB (such as the REs with square shadows in Figure 16) belong to the third code division multiplexing group (such as CDM#2 in Figure 16), and the REs numbered 9 and 11 in the first RB and numbered 1 and 3 in the second RB (such as the REs with horizontal line shadows in Figure 16) belong to the fourth code division multiplexing group (such as CDM#3 in Figure 16).

[0189] Optionally, according to the pilot density derivation process described above, the second device can determine that in this implementation, each CDM group has 12 REs for DMRS in every 4 RBs, and the DMRS pilot density is: 3 / 4RE / port / RB, which is lower than the pilot density of the previous implementation.

[0190] Optionally, the correspondence between each CDM group and the antenna port is shown in Figure 16. For example, CDM#0 corresponds to antenna ports 0, 1, 8, and 9 (p0, p1, p8, p9), CDM#1 corresponds to antenna ports 2, 3, 10, and 11 (p2, p3, p10, p11), CDM#2 corresponds to antenna ports 16, 17, 24, and 25 (p16, p17, p24, p25), and CDM#3 corresponds to antenna ports 18, 19, 26, and 27 (p18, p19, p26, p27).

[0191] Optional, pseudo-random sequence r(m) to DMRS resource unit (k,l) p,μ The mapping relationship is shown in the following formula (20), where the corresponding relationship between the value of the parameter Δ and the CDM group number is shown in Table 9: k=16n+2k′+Δ (21) k′=0,1,2,3 (22) n=0,1,… (24)

[0192] Table 9: Single-symbol CDM group numbers and parameter Δ

[0193] Optionally, the DMRS base sequence r(x) in formula (20) is implemented as follows: r(x)=r(2n+k′).

[0194] Optionally, the DMRS base sequence r(x) in formula (20) is implemented as follows:

[0195] Optionally, in this implementation, the resources of the P1 antenna ports (the resources of the P1 antenna ports of the 6G terminal) and the resources of the P2 antenna ports of R15 or R18 can be orthogonal to each other. For example, the right part of Figure 16 shows the relationship between some antenna ports of R15, R18 and R20 and the resources of the antenna ports. If the resources of the two antenna ports do not overlap, orthogonality can be achieved through FDM, and spatial division multiplexing of different wireless access technologies can be achieved. Among them, the length of the frequency domain OCC of R15 is 2 (FD-OCC 2), the length of the frequency domain OCC of R18 is 4 (FD-OCC 4), and the length of the frequency domain OCC of R20 is 4 (FD-OCC 4). It can be seen that for R15, R18 and R20, the two antenna ports of R15 (i.e., P2=2) and the four antenna ports of R18 (i.e., P2=4) may be orthogonal to the 8 antenna ports of R20 (i.e., P1=8), as shown in Table 10.

[0196] Table 10: List of mutually orthogonal antenna ports for R15, R18, and R20.

[0197] For example, Case 1 in Table 10 indicates that p0 of R15 and p1 and p17 of R20 are mutually orthogonal (specifically including p0 and p1, and / or p0 and p17 are orthogonal), Case 2 indicates that p1 of R15 and p0 and p16 of R20 are mutually orthogonal (specifically including p1 and p0, and / or p1 and p16 are orthogonal), and Case 2 indicates that p0, p1, p8, p9 of R18 and p0, p1, p8, p9, p16, p17, p24, and p25 of R20 are mutually orthogonal.

[0198] This implementation has a lower pilot density, enabling more DMRS orthogonal ports to increase the number of spatial division multiplexing layers. It also enables spatial division multiplexing between 5G and 6G terminals, saving DMRS overhead and improving spectrum sharing efficiency.

[0199] (3) Assume that the DMRS symbol of the first resource pattern includes more CDM groups and a lower pilot density, and that different CDM groups are multiplexed using FDM. For Type 2, a single DMRS symbol supports 24 ports, and a double DMRS symbol supports 48 ports.

[0200] Implementation method 1: A single DMRS symbol includes six CDM groups, and the frequency domain OCC length of each CDM group is 4.

[0201] Optionally, the first resource pattern includes six code division multiplexing groups, the first resource pattern includes an adjacent first resource block and a second resource block, and each resource block includes multiple resource units. Each code division multiplexing group corresponds to 4 resource units, and the 4 resource units are grouped in pairs, and each group of resource units is non-adjacent and separated by 4 resource units; or each code division multiplexing group corresponds to 4 resource units, and each group of resource units is non-adjacent and separated by 10 resource units.

[0202] For example, Figure 17 is a schematic diagram of another first resource pattern provided by this application, illustrating the CDM distribution within a resource block and the antenna ports included in each CDM group. The left portion of Figure 17 corresponds to Option 1, and the right portion of Figure 17 corresponds to Option 2. It will be appreciated that the embodiment shown in Figure 17 shares similar concepts to the embodiment shown in Figure 9, differing in that four REs in each CDM group are used to transmit DMRS.

[0203] Option 1: The first resource pattern includes six code division multiplexing groups. Each code division multiplexing group corresponds to four independent antenna ports. Each code division multiplexing in each code division multiplexing group includes four resource units. The four resource units use a frequency-domain OCC of length 4. The four resource units belong to the same resource block and are numbered as k, k+1, k+6, and k+7, respectively, where k is an integer greater than or equal to 0.

[0204] For example, the entire left portion of FIG17 includes the first RB and the second RB. The first RB includes REs numbered 0-11, and the second RB includes REs numbered 0-11 (each RE is represented by a block in FIG17 ). Assume that the numbering of the first code division multiplexing group or the fourth code division multiplexing group satisfies k=0, the numbering of the second code division multiplexing group or the fifth code division multiplexing group satisfies k=2, and the numbering of the third code division multiplexing group or the sixth code division multiplexing group satisfies k=4. The REs numbered 0, 1, 6, and 7 in the first RB (the REs shaded by diagonal lines in FIG17 ) belong to the first code division multiplexing group (such as CDM#0 in FIG17 ), the REs numbered 2, 3, 8, and 9 in the first RB (the REs shaded by horizontal lines in FIG17 ) belong to the second code division multiplexing group (CDM#1 in FIG17 ), and the REs numbered 4, 5, 10, and 11 in the first RB (the REs shaded by cross lines in FIG17 ) belong to the third code division multiplexing group (such as CDM#1 in FIG17 ). 2), the REs numbered 0, 1, 6, and 7 in the second RB (such as the REs with cross-hatching in Figure 17) belong to the fourth code division multiplexing group (such as CDM#3 in Figure 17), the REs numbered 2, 3, 8, and 9 in the second RB (such as the REs with vertical line shading in Figure 17) belong to the fifth code division multiplexing group (such as CDM#4 in Figure 17), and the REs numbered 4, 5, 10, and 11 in the second RB (such as the REs with spot shading in Figure 17) belong to the sixth code division multiplexing group (such as CDM#5 in Figure 17). It can be seen that in option 1, the four REs used for sending DMRS in two adjacent RBs for each antenna port are grouped in pairs (for example, the REs numbered 0 and 1 in the first RB are grouped in one group, and the REs numbered 6 and 7 in the first RB are grouped in one group), are not adjacent, and the two groups of REs are separated by 4 REs.

[0205] Option 2: The first resource pattern includes six CDM groups. Each CDM group corresponds to four independent antenna ports. Each CDM in each CDM group includes four resource units. The four resource units use a frequency-domain OCC of length 4. The four resource units belong to two adjacent resource blocks and are numbered as k, k+1, k+12, and k+13, respectively. k is an integer greater than or equal to 0.

[0206] For example, the right portion of FIG17 includes the first RB and the second RB as a whole, the first RB includes REs numbered 0-11, and the second RB includes REs numbered 0-11 (each RE is shown as a block in FIG17 ). Assume that the numbering of the first code division multiplexing group satisfies k=0, the second code division multiplexing group satisfies k=2, the third code division multiplexing group satisfies k=4, the fourth code division multiplexing group satisfies k=6, the fifth code division multiplexing group satisfies k=8, and the sixth code division multiplexing group satisfies k=10. Among them, the REs numbered 0 and 1 in the first RB and the REs numbered 0 and 1 in the second RB (such as the REs with oblique line shadows in Figure 17) belong to the first code division multiplexing group (CDM#0 in Figure 17), the REs numbered 2 and 3 in the first RB and the REs numbered 2 and 3 in the second RB (such as the REs with horizontal line shadows in Figure 17) belong to the second code division multiplexing group (CDM#1 in Figure 17), and the REs numbered 4 and 5 in the first RB and the REs numbered 4 and 5 in the second RB (such as the REs with cross-line shadows in Figure 17) belong to the third code division multiplexing group (CDM#2 in Figure 17). , REs numbered 6 and 7 in the first RB and 6 and 7 in the second RB (such as the REs with cross-hatching in Figure 17) belong to the fourth code division multiplexing group (such as CDM#3 in Figure 17), REs numbered 8 and 9 in the first RB and 8 and 9 in the second RB (such as the REs with vertical shading in Figure 17) belong to the fifth code division multiplexing group (such as CDM#4 in Figure 17), and REs numbered 10 and 11 in the first RB and 10 and 11 in the second RB (such as the REs with spot shading in Figure 17) belong to the sixth code division multiplexing group (such as CDM#5 in Figure 17). It can be seen that in option 2, the four REs used for transmitting DMRS in two adjacent RBs for each antenna port are grouped in pairs (for example, the REs numbered 0 and 1 in the first RB are grouped together, and the REs numbered 0 and 1 in the second RB are grouped together). They are not adjacent, and the two groups of REs are separated by 10 REs.

[0207] Optionally, for option 1, the pseudo-random sequence r(m) to the DMRS resource unit (k, l) p,μ The mapping relationship is shown in the following formula (25), where the corresponding relationship between the value of the parameter Δ and the CDM group number is shown in Table 11: k′=0,1,2,3 (27) n=0,1,… (29)

[0208] Table 11: Option 1, single symbol CDM group number and parameter Δ

[0209] Optionally, the DMRS base sequence r(x) in formula (25) is implemented as follows: r(x)=r(4n+k′).

[0210] Optionally, the DMRS base sequence r(x) in formula (25) is implemented as follows: r(x)=r(8n+k′+y), where if Δ<12, y=0, otherwise, y=4.

[0211] Optionally, for option 2, the pseudo-random sequence r(m) to the DMRS resource unit (k, l) p,μ The mapping relationship is shown in the following formula (30), where the corresponding relationship between the value of the parameter Δ and the CDM group number is shown in Table 12: k′=0,1,2,3 (32) n=0,1,… (34)

[0212] Table 12: Option 2, single symbol CDM group number and parameter Δ

[0213] Optionally, the DMRS base sequence r(x) in formula (30) is implemented as follows: r(x)=r(4n+k′).

[0214] Optionally, according to the pilot density derivation process described above, the second device may determine that the DMRS pilot density in the first implementation is: 1 / 2RE / port / RB.

[0215] Optionally, the resources of the P1 antenna ports of 6G in this implementation method 1 can be orthogonal to the resources of the P2 antenna ports of the existing 5G. For example, for the above-mentioned options 1 and 2, Figure 18 is a schematic diagram of another antenna port of R15, R18 and R20 and the resources of the antenna port provided by this application. Among them, the length of the frequency domain OCC of R15 is 2 (FD-OCC 2), the length of the frequency domain OCC of R18 is 4 (FD-OCC 4), and the length of the frequency domain OCC of R20 is 4 (FD-OCC 4). Figure 18 only shows the resources of some antenna ports (for example, the resources of two antenna ports in different versions overlap). If the resources of the two antenna ports do not overlap, orthogonality can be achieved through FDM, and spatial division multiplexing of different wireless access technologies can be achieved. It can be seen that the two antenna ports of R15 (i.e., P2=2) and the eight antenna ports of R20 (i.e., P1=8) are orthogonal to each other, and the four antenna ports of R18 (i.e., P2=4) and the eight antenna ports of R20 (i.e., P1=8) are orthogonal to each other, as shown in Table 13.

[0216] Table 13: List of mutually orthogonal antenna ports for R15, R18, and R20.

[0217] For the specific description of different Cases in Table 13, please refer to the similar description in the previous embodiment, which will not be repeated here.

[0218] In this implementation, whether using Option 1 or Option 2, the pilot density is sparser and the number of available antenna ports is increased. Optionally, for Option 1, the frequency domain span of FD-OCC4 is the same as that of R18, and can be improved upon R18 to be suitable for scenarios with large delay spread. Optionally, for Option 2, the frequency domain span of FD-OCC4 is larger (spanning 14 REs), making it more suitable for scenarios with small delay spread.

[0219] Implementation method 2: A single DMRS symbol includes three CDM groups, and the frequency domain OCC length of each CDM group is 8.

[0220] Optionally, the first resource pattern includes three code division multiplexing groups, the first resource pattern includes a first resource block and a second adjacent resource block, each resource block includes multiple resource units. Any code division multiplexing in each code division multiplexing group includes 8 resource units, and the 8 resource units are grouped in pairs, and each group of resource units is non-adjacent and separated by 4 resource units.

[0221] Optionally, the first resource pattern in the second implementation method can also be described as: the first resource pattern includes three code division multiplexing groups. Each code division multiplexing group corresponds to 8 independent antenna ports, and any code division multiplexing in each code division multiplexing group includes 8 resource units. The 8 resource units use a frequency domain OCC with a length of 8. The 8 resource units belong to two adjacent resource blocks, and the 8 resource units are numbered as follows: k, k+1, k+6, k+7, k+12, k+13, k+18, k+19, where k is an integer greater than or equal to 0.

[0222] For example, Figure 19 is a schematic diagram of another first resource pattern provided by the present application, showing the CDM distribution in a resource block, the antenna ports included in each CDM group, and the antenna ports of R15, R18, and R20 and the resources of the antenna ports. The left portion of Figure 19 includes the first RB and the adjacent second RB as a whole, the first RB including REs numbered 0-11, and the second RB including REs numbered 0-11 (each RE is shown as a block in Figure 19). Assume that the number of the first code division multiplexing group satisfies k=0, the second code division multiplexing group satisfies k=2, and the number of the third code division multiplexing group satisfies k=4. Among them, the REs numbered 0, 1, 6, 7 in the first RB and the REs numbered 0, 1, 6, 7 in the second RB (such as the REs with oblique hatching in Figure 19) belong to the first code division multiplexing group (CDM#0 in Figure 19), the REs numbered 2, 3, 8, 9 in the first RB and the REs numbered 2, 3, 8, 9 in the second RB (such as the REs with horizontal hatching in Figure 19) belong to the second code division multiplexing group (CDM#1 in Figure 19), and the REs numbered 4, 5, 10, 11 in the first RB and the REs numbered 4, 5, 10, 11 in the second RB (such as the REs with square hatching in Figure 19) belong to the third code division multiplexing group (CDM#2 in Figure 19).

[0223] Optional, pseudo-random sequence r(m) to DMRS resource unit (k,l) p,μ The mapping relationship is shown in the following formula (35), where the corresponding relationship between the value of the parameter Δ and the CDM group number is shown in Table 14: k′=0,1,2,3,4,5,6,7 (37) n=0,1,… (39)

[0224] Table 14: Single-symbol CDM group numbers and parameter Δ

[0225] Optionally, the DMRS base sequence r(x) in formula (35) is implemented as follows: r(x)=r(8n+k′).

[0226] Optionally, according to the pilot density derivation process described above, the second device may determine that the DMRS pilot density in the second implementation is: 1 / 2RE / port / RB, which is the same as the DMRS pilot density in the first implementation.

[0227] Optionally, a CDM group of OCC8 may be further divided into more groups to achieve a larger number of antenna ports.

[0228] Optionally, the resources of the P1 antenna ports of 6G in the second implementation method can be orthogonal to the resources of the P2 antenna ports of the existing 5G. For example, the length of the frequency domain OCC of R15 shown in Figure 19 is 2 (FD-OCC 2), the length of the frequency domain OCC of R18 is 4 (FD-OCC 4), and the length of the frequency domain OCC of R20 is 8 (FD-OCC 8). Figure 19 only shows the resources of some antenna ports (for example, the case where the resources of two antenna ports under different versions overlap). If the resources of the two antenna ports do not overlap, orthogonality can be achieved through FDM, and spatial division multiplexing of different wireless access technologies can be achieved. It can be seen that the two antenna ports of R15 (i.e., P2=2) and the two antenna ports of R20 (i.e., P1=2) are orthogonal to each other, and the four antenna ports of R18 (i.e., P2=4) and the four antenna ports of R20 (i.e., P1=4) are orthogonal to each other, as shown in Table 15.

[0229] Table 15: List of mutually orthogonal antenna ports for R15, R18, and R20.

[0230] In this second implementation, the pilot density is sparser, increasing the number of available antenna ports. Furthermore, the frequency domain span of OCC8 is compatible with the frequency domain pattern of 5G DMRS, achieving DMRS orthogonality with 5G terminals without increasing resources. Furthermore, compared to the first implementation, the channel estimation performance of FD-OCC8 is superior to that of FD-OCC4 when delay spread is small.

[0231] In one example, the first configuration information is further used to configure a third resource pattern. The third resource pattern includes Q antenna ports. For example, the third resource pattern is also applicable to the first RAT (such as 6G). Considering the channel estimation performance and frequency selection characteristics, the 6G FD-OCC can be designed with a sparser or more compact RE density, which may not be compatible with the second resource pattern of the second RAT.

[0232] Optionally, if the first configuration information is also used to configure a third resource pattern, the second device may further send second indication information to the first device, where the second indication information is used to indicate Q1 antenna ports among the Q antenna ports. The resources of the Q1 antenna ports are not orthogonal to the resources of the P2 antenna ports, and Q and Q1 are positive integers, with Q1 being less than or equal to Q.

[0233] Optionally, the third resource pattern includes one or more code division multiplexing groups, the third resource pattern includes adjacent first resource blocks and second resource blocks, and each resource block includes multiple resource units. Specifically, the FD-OCC length of the third resource pattern can be 4 or 8, or a longer FD-OCC, which is not limited in this application.

[0234] Option 1: The third resource pattern includes three code division multiplexing groups. Each code division multiplexing group corresponds to four independent antenna ports. Any code division multiplexing in each code division multiplexing group includes four resource units. The four resource units use a frequency-domain OCC of length 4. The four resource units belong to the same resource block and are numbered as follows: k, k+3, k+6, k+9, or k, k+1, k+2, k+3, where k is an integer greater than or equal to 0.

[0235] For example, Figure 20 is a schematic diagram of the third resource pattern provided by this application. The portion indicated by FD-OCC4 in Figure 20 corresponds to the two cases of Option 1. It is understood that, from bottom to top, every 12 REs (such as the blocks in Figure 20) correspond to one RB. Assume that the number of the first, second, or third CDM group satisfies k = 0. Among them, REs numbered 0, 3, 6, and 9 in the first RB (such as the REs with oblique line shadows in Figure 12) and REs numbered 0, 3, 6, and 9 in the second RB belong to the first code division multiplexing group, REs numbered 1, 4, 7, and 10 in the first RB (such as the REs with oblique line shadows in Figure 12) and REs numbered 1, 4, 7, and 10 in the second RB belong to the second code division multiplexing group, REs numbered 2, 5, 8, and 11 in the first RB (such as the REs with oblique line shadows in Figure 12) and REs numbered 2, 5, 8, and 11 in the second RB belong to the third code division multiplexing group, and all three code division multiplexing groups use FD-OCC 4. Alternatively, REs numbered 0, 1, 2, 3 in the first RB and REs numbered 0, 1, 2, 3 in the second RB belong to the first code division multiplexing group, REs numbered 4, 5, 6, 7 in the first RB and REs numbered 4, 5, 6, 7 in the second RB belong to the second code division multiplexing group, REs numbered 8, 9, 10, 11 in the first RB and REs numbered 8, 9, 10, 11 in the second RB belong to the third code division multiplexing group, and all three code division multiplexing groups use FD-OCC 4.

[0236] Option 2: The third resource pattern includes three CDM groups. Each CDM group corresponds to eight independent antenna ports. Any CDM in each CDM group includes eight resource units. The eight resource units use a frequency-domain OCC of length 8. The eight resource units belong to two adjacent resource blocks in the frequency domain, and the eight resource units are numbered as follows: k, k+3, k+6, k+9, k+12, k+15, k+18, k+21, or k, k+1, k+2, k+3, k+12, k+13, k+14, k+15.

[0237] For example, the portion indicated by FD-OCC 8 in Figure 20 corresponds to the two cases of Option 2. It can be understood that, from bottom to top, every 12 REs (such as the blocks in Figure 20) correspond to one RB. Assume that the numbering of the first CDM group satisfies k = 0, the numbering of the second CDM group satisfies k = 1, and the numbering of the third CDM group satisfies k = 2. Within the two RBs, the REs numbered 0, 3, 6, 9, 12, 15, 18, and 21, arranged in ascending order, belong to the first CDM group, the REs numbered 1, 4, 7, 10, 13, 16, 19, and 22 belong to the second CDM group, and the REs numbered 2, 5, 8, 11, 14, 17, 20, and 23 belong to the third CDM group. The first, second, and third CDM groups all use FD-OCC 8.

[0238] Optionally, if the first configuration information is also used to configure the third resource pattern, the second device may further send fourth indication information to the first device, where the fourth indication information is used to indicate whether the terminal spatially scheduled with the second device includes a terminal of the second RAT. For example, if the fourth indication information indicates that the terminal spatially scheduled by the current base station does not include a 5G terminal (for example, does not include a 5G R15 UE, or does not include a 5G R18 UE), the second device may use the third resource pattern to send DMRS. Alternatively, if the fourth indication information indicates that the terminal spatially scheduled by the current base station includes a 5G terminal, the second device may use the first resource pattern to send DMRS. Through the fourth indication information, the DMRS resource pattern used by the 6G terminal can be switched, and spatial division multiplexing can be achieved between 6G UE and 5G UE in the DSS scenario. When only 6G terminals share spatial resources, a 6G-specific DMRS resource pattern can be used to improve the performance of channel estimation and data transmission.

[0239] This example describes possible implementations of a 6G resource pattern when the 6G and 5G resource patterns are incompatible. When 6G and 5G do not share spatial division resources, 6G terminals can use a 6G-specific DMRS resource pattern to improve channel estimation and data transmission performance, providing more flexible resource allocation.

[0240] Optionally, the specific indication method of the first indication information or the second indication information may be an explicit indication. For example, the first indication information directly indicates the first resource pattern, or the first indication information carries the identifier of P1 antenna ports; when the first device receives the first indication information, it can determine the P1 antenna port for receiving DMRS based on the first resource pattern; or determine the P1 antenna port for receiving DMRS based on the identifier of P1 antenna port. For another example, the second indication information directly indicates the third resource pattern, or the second indication information carries the identifier of Q1 antenna ports; when the first device receives the second indication information, it can determine the Q1 antenna port for receiving DMRS based on the third resource pattern, or determine the Q1 antenna port for receiving DMRS based on the identifier of Q1 antenna port.

[0241] Optionally, the specific indication method of the first indication information or the second indication information may be an implicit indication. For example, assuming that the first device and the second device have pre-configured at least two resource patterns (such as the first resource pattern and the third resource pattern), the first indication information or the second indication information may include an index of the resource pattern; when the first device receives the first indication information or the second indication information, it may query the preset resource pattern based on the index of the resource pattern to determine the P1 antenna port or the Q1 antenna port for receiving the DMRS.

[0242] Optionally, before S101, the following steps are further included: the first device sends third indication information to the second device, where the third indication information is used to indicate that the terminal supports the first resource pattern and the third resource pattern. For example, a 6G terminal can send third indication information to the base station, where the third indication information is used to indicate that the 6G terminal supports both the first resource pattern compatible with 5G and the third resource pattern incompatible with 5G.

[0243] S103, the second device sends a demodulation reference signal on the resources of P1 antenna ports; correspondingly, the first device receives the demodulation reference signal on the resources of P1 antenna ports.

[0244] For example, the first device and the second device can determine the resource pattern for sending DMRS and the corresponding DMRS for receiving DMRS through the first configuration information and the first indication information, and determine the antenna port for sending DMRS and the corresponding DMRS for receiving DMRS. The specific process of sending DMRS or receiving DMRS can refer to the corresponding description in the protocol standard, and this application is not limited thereto.

[0245] In this embodiment, the first device can receive the first configuration information and the first indication information, thereby determining a first resource pattern of DMRS applicable to 6G, and determining the resources of the antenna port receiving DMRS (for example, the P1 antenna port among the P antenna ports of the first resource pattern). In addition, the resources of the P1 antenna port are orthogonal to the resources of the P2 antenna port of the second resource pattern applicable to the second radio access technology, which can achieve compatibility with 5G. For example, in a dynamic spectrum sharing scenario, the network device can send orthogonal DMRS to 5G terminals and 6G terminals on the same time domain symbol to achieve spatial division multiplexing between 5G and 6G terminals, save DMRS overhead, and improve spectrum sharing efficiency. Optionally, the P antenna ports also include P3 antenna ports, which are different from the P1 antenna ports. The resources of the P3 antenna port are not orthogonal to the resources of the P2 antenna port, that is, the resources of some antenna ports of the first resource pattern are not orthogonal to the resources of some antenna ports of the second resource pattern, indicating that the two resource patterns are not completely orthogonal and are applicable to different radio access technologies.

[0246] In the present application, a code division multiplexing group may include one or more code division multiplexings, and each code division multiplexing applies an OCC of length N. For example, a code division multiplexing group contains one or more code division multiplexings in each RB. The antenna ports corresponding to different code division multiplexings in a code division multiplexing group are the same. For example, the code division multiplexing corresponding to an OCC of length 4 includes 4 antenna ports, and the antenna port numbers are represented by the following set: (p0, p1, p2, p3). Then, the set of antenna ports corresponding to each code division multiplexing included in a code division multiplexing group is: (p0, p1, p2, p3). Different code division multiplexing groups are frequency-division or time-division multiplexed, so the corresponding antenna ports are different. For example, the antenna port sets corresponding to the first code division multiplexing group and the second code division multiplexing group are: (p0, p1, p2, p3) and (p4, p5, p6, p7) respectively.

[0247] For example, in this application, CDM n in FIG. 6 and CDM#n in FIG. 9 to FIG. 19 both represent the numbers of CDM groups.

[0248] Optionally, the embodiments of the present application may also be applicable to the case where DMRS is multi-symbol, for example, the case where DMRS is a double symbol, that is, two adjacent OFDM symbols, or the case where DMRS is a triple symbol, that is, three adjacent OFDM symbols.

[0249] Optionally, when DMRS is a multi-symbol, OCC is also applied to the DMRS sequence in the time domain. For example, for a DMRS double symbol, an OCC with a length of 2 is applied in the time domain.

[0250] Optionally, the length m of the frequency domain OCC and the length of the time domain OCC combined with n are multiplied together to form an OCC with a length of m*n.

[0251] Optionally, the OCC sequence belongs to a row or a column in a Hadamard matrix.

[0252] Optionally, the embodiments of the present application may also be applicable to the case of configuring additional DMRS.

[0253] Optionally, the network device indicates the CDM group number of the terminal P1 antenna port.

[0254] Optionally, the network device instructs the terminal P1 whether other antenna ports in the CDM group where the antenna port is located are scheduled to other terminals.

[0255] Optionally, the network device instructs the terminal whether other CDM groups corresponding to the P antenna ports, except for the CDM group where the P1 antenna port is located, are scheduled to other terminals.

[0256] Optionally, the network device indicates the number of CDM groups in which the terminal does not schedule other terminals.

[0257] Optionally, the network device indicates to the terminal that there is no number of a CDM group that schedules other terminals.

[0258] Optionally, the network device instructs the terminal to schedule other terminals simultaneously to belong to a radio access technology, which is the first RAT or the second RAT.

[0259] Optionally, the first indication information, the second indication information, and the fourth indication information are indicated by downlink control information (DCI).

[0260] It is understood that in order to implement the functions of the above-mentioned device embodiments, the base station and the terminal include hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily appreciate that, in conjunction with the various exemplary units and method steps described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in hardware or in a computer software-driven hardware manner depends on the specific application scenario and design constraints of the technical solution.

[0261] Figures 21 and 22 are schematic diagrams of possible communication devices provided by this application. These communication devices can be used to implement the functions of the terminal or network device (such as a base station) in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments. In the embodiments of the present application, the communication device can be the terminal 120 as shown in Figure 1, or the base station 110a or 110b as shown in Figure 1, or a module (such as a chip) applied to the terminal or base station.

[0262] As shown in Figure 21, communication device 2100 includes a processing unit 2110 and a transceiver unit 2120. Communication device 2100 is used to implement the functions of a terminal or base station in the method embodiments shown in Figures 8 to 20 above. Optionally, transceiver unit 2120 includes a transmitting unit and a receiving unit, and transceiver unit 2120 can also be referred to as a communication unit.

[0263] When the communication device 2100 is used to implement the functions of a terminal in the method embodiment shown in FIG8 : the transceiver unit 2120 is configured to receive first configuration information for a first radio access technology, the first configuration information being used to configure a first resource pattern, the first resource pattern including P antenna ports. The transceiver unit 2120 is further configured to receive first indication information, the first indication information being used to indicate P1 antenna ports among the P antenna ports, resources of the P1 antenna port being orthogonal to resources of the P2 antenna ports included in the second resource pattern; the P antenna ports also including P3 antenna ports, which are different from the P1 antenna port, and resources of the P3 antenna port being non-orthogonal to resources of the P2 antenna port. The second resource pattern is applicable to a second radio access technology, the first radio access technology is different from the second radio access technology, P, P1, P2, and P3 are positive integers, P1 is less than P, and P2 is less than P. The processing unit 2110 is configured to determine, based on the first indication information, the P1 antenna port to receive a demodulation reference signal. The transceiver unit 2120 is further configured to receive a demodulation reference signal on resources of P1 antenna ports.

[0264] In a possible implementation, the transceiver unit 2120 is further configured to send third indication information, where the third indication information is used to indicate that the terminal supports the first resource pattern and the third resource pattern.

[0265] It can be seen that when the communication device 2100 is used to implement the function of the terminal in the method embodiment shown in Figure 8, the communication device 2100 can receive the first configuration information and the first indication information, thereby determining the first resource pattern of the demodulation reference signal applicable to 6G, and determining the resources of the antenna port for receiving DMRS (for example, the P1 antenna port among the P antenna ports of the first resource pattern). In addition, the resources of the P1 antenna port are orthogonal to the resources of the P2 antenna ports of the second resource pattern applicable to the second wireless access technology, and compatibility with 5G can be achieved. For example, in a dynamic spectrum sharing scenario, the base station can send orthogonal DMRS to the 5G terminal and the 6G terminal respectively on the same time domain symbol to achieve spatial division multiplexing between 5G and 6G terminals, save DMRS overhead, and improve spectrum sharing efficiency. Optionally, the P antenna ports also include P3 antenna ports. The P3 antenna port is different from the P1 antenna port, and the resources of the P3 antenna port are not orthogonal to the resources of the P2 antenna port. That is, the resources of some antenna ports of the first resource pattern are not orthogonal to the resources of some antenna ports of the second resource pattern, indicating that the two resource patterns are not completely orthogonal and are suitable for different wireless access technologies.

[0266] When the communication device 2100 is used to implement the functions of a base station in the method embodiment shown in FIG8 : the processing unit 2110 is used to determine first configuration information for a first radio access technology, and the transceiver unit 2120 is used to send the first configuration information for the first radio access technology, the first configuration information being used to configure a first resource pattern, the first resource pattern including P antenna ports. The processing unit 2110 is further used to determine first indication information, and the transceiver unit 2120 is further used to send first indication information, the first indication information being used to indicate that P1 antenna ports among the P antenna ports, resources of the P1 antenna port are orthogonal to resources of the P2 antenna ports included in the second resource pattern; the P antenna ports also include a P3 antenna port, the P3 antenna port being different from the P1 antenna port, and resources of the P3 antenna port being non-orthogonal to resources of the P2 antenna port; the second resource pattern is applicable to a second radio access technology, the first radio access technology is different from the second radio access technology, P, P1, and P2 are positive integers, P1 is less than P, and P2 is less than P. The transceiver unit 2120 is further configured to send a demodulation reference signal on resources of P1 antenna ports.

[0267] In a possible implementation, the transceiver unit 2120 is further configured to receive third indication information, where the third indication information is used to indicate that the terminal supports the first resource pattern and the third resource pattern.

[0268] It can be seen that when the communication device 2100 is used to implement the function of the network device in the method embodiment shown in Figure 8, the communication device 2100 can send the first configuration information and the first indication information, thereby configuring the first device with a first resource pattern for a demodulation reference signal DMRS suitable for 6G, and indicating to the first device the resources of the antenna port (for example, the P1 antenna port among the P antenna ports of the first resource pattern) for receiving the DMRS. In addition, the resources of the P1 antenna port are orthogonal to the resources of the P2 antenna ports of the second resource pattern suitable for the second radio access technology, thereby achieving compatibility with 5G. Optionally, the P antenna ports also include a P3 antenna port, which is different from the P1 antenna port, and the resources of the P3 antenna port are not orthogonal to the resources of the P2 antenna port. That is, the resources of some antenna ports of the first resource pattern are not orthogonal to the resources of some antenna ports of the second resource pattern, indicating that the two resource patterns are not completely orthogonal and are suitable for different radio access technologies.

[0269] For a more detailed description of the processing unit 2110 and the transceiver unit 2120 , please refer to the relevant description in the method embodiment shown in FIG8 .

[0270] As shown in Figure 22, the communication device 2200 includes a processor 2210 and an interface circuit 2220. The processor 2210 and the interface circuit 2220 are coupled to each other. It is understood that the interface circuit 2220 can be a transceiver or an input / output interface. Optionally, the communication device 2200 may also include a memory 2230 for storing instructions executed by the processor 2210, or storing input data required by the processor 2210 to execute instructions, or storing data generated after the processor 2210 executes instructions. Sometimes, the interface circuit 2220 can also be understood as a part of the processor 2210, in which case the communication device 2200 includes the processor 2210. Optionally, the transceiver includes a transmitter and a receiver.

[0271] When the communication device 2200 is used to implement the method shown in FIG8 , the processor 2210 is used to implement the functions of the processing unit 2110 , and the interface circuit 2220 is used to implement the functions of the transceiver unit 2120 .

[0272] When the above-mentioned communication device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the above-mentioned method embodiment. When the terminal chip receives information from the base station, it can be understood that the information is first received by other modules in the terminal (such as a radio frequency module or antenna) and then sent to the terminal chip by these modules. When the terminal chip sends information to the base station, it can be understood that the information is first sent to other modules in the terminal (such as a radio frequency module or antenna) and then sent to the base station by these modules.

[0273] When the above-mentioned communication device is a chip applied to a base station, the base station chip implements the functions of the base station in the above-mentioned method embodiment. When the base station chip receives information from the terminal, it can be understood that the information is first received by other modules in the base station (such as a radio frequency module or antenna) and then sent to the base station chip by these modules. When the base station chip sends information to the terminal, it can be understood that the information is sent to other modules in the base station (such as a radio frequency module or antenna) and then sent to the terminal by these modules.

[0274] In this application, when entity A sends information to entity B, it can be done directly from A to B or indirectly through another entity. Similarly, when entity B receives information from entity A, it can be done directly from entity B or indirectly through another entity. Entities A and B herein can be RAN nodes or terminals, or modules within a RAN node or terminal. The sending and receiving of information can be information exchange between a RAN node and a terminal, for example, between a base station and a terminal; the sending and receiving of information can also be information exchange between two RAN nodes, for example, between a CU and a DU; the sending and receiving of information can also be information exchange between different modules within a device, for example, between a terminal chip and other modules in the terminal, or between a base station chip and other modules within the base station.

[0275] In other words, sending and receiving can be performed between devices, for example, between a network device and a terminal device, or can be performed within a device, for example, sending or receiving between components, modules, chips, software modules or hardware modules within the device through a bus, wiring or interface.

[0276] It is understandable that information may be processed between the source and destination of information transmission, such as coding, modulation, etc., but the destination can understand the valid information from the source. Similar expressions in this application can be understood similarly and will not be repeated.

[0277] It is understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0278] The method steps in the embodiments of the present application can be implemented in hardware or in software instructions that can be executed by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disk, mobile hard disk, CD-ROM or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. The storage medium can also be an integral part of the processor. The processor and storage medium can be located in an ASIC. In addition, the ASIC can be located in a base station or a terminal. The processor and storage medium can also exist in a base station or a terminal as discrete components.

[0279] In the above embodiments, all or part of the embodiments may be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable device. The computer program or instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions may be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; an optical medium, such as a digital video disk; or a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.

[0280] In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0281] In this application, "at least one" means one or more, and "more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In the text description of this application, the character " / " generally indicates that the previous and next associated objects are in an "or" relationship; in the formula of this application, the character " / " indicates that the previous and next associated objects are in a "division" relationship. "Including at least one of A, B and C" can mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C.

[0282] In this application, words such as "first" and "second" can be used to distinguish technical features with the same or similar functions. The words such as "first" and "second" do not limit the quantity and execution order, and the words such as "first" and "second" do not necessarily limit them to be different. In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or design. The use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way for easy understanding.

[0283] In the embodiments of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. The information indicated by a certain information (such as the indication information described below) is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein there is an association between the other information and the information to be indicated; it is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance, for example, the indication of specific information can be achieved with the help of the arrangement order of each information agreed in advance (such as predefined by the protocol), thereby reducing the indication overhead to a certain extent. The present application does not limit the specific method of indication. It is understandable that, for the sender of the indication information, the indication information can be used to indicate the information to be indicated, and for the receiver of the indication information, the indication information can be used to determine the information to be indicated.

[0284] It is understood that the various numbers used in the embodiments of this application are merely for ease of description and are not intended to limit the scope of the embodiments of this application. The order of the sequence numbers of the above-mentioned processes does not necessarily imply a specific order of execution; the order of execution of the processes should be determined by their functions and inherent logic.

Claims

1. A communication method, characterized in that: The method comprises: Receiving first configuration information of a first radio access technology, where the first configuration information is used to configure a first resource pattern, where the first resource pattern includes P antenna ports; receiving first indication information, where the first indication information is used to indicate a P1 antenna port among the P antenna ports, where resources of the P1 antenna port are orthogonal to resources of the P2 antenna port included in the second resource pattern; and the P antenna ports further include a P3 antenna port, where the P3 antenna port is different from the P1 antenna port, and resources of the P3 antenna port are not orthogonal to resources of the P2 antenna port; The second resource pattern is applicable to a second radio access technology, the first radio access technology and the second radio access technology are different, P, P1, P2, and P3 are positive integers, wherein P1, P2, and P3 are all smaller than P; A demodulation reference signal is received on resources of the P1 antenna ports.

2. The method according to claim 1, characterized in that The first configuration information is further used to configure a third resource pattern, where the third resource pattern includes Q antenna ports; and the method further includes: receiving second indication information, where the second indication information is used to indicate Q1 antenna ports among the Q antenna ports, where resources of the Q1 antenna port are not orthogonal to resources of the P2 antenna ports; where Q and Q1 are positive integers, and Q1 is less than or equal to Q; A demodulation reference signal is received on the resources of the Q1 antenna ports.

3. The method according to claim 2, characterized in that The method further comprises: Send third indication information, where the third indication information is used to indicate that the terminal supports the first resource pattern and the third resource pattern.

4. The method according to claim 2 or 3, characterized in that The third resource pattern includes three code division multiplexing groups; Each code division multiplexing group corresponds to 4 independent antenna ports, and any code division multiplexing in each code division multiplexing group includes 4 resource units, and the 4 resource units use a frequency domain orthogonal superposition code OCC with a length of 4. The 4 resource units belong to the same resource block, and the 4 resource units are numbered as follows: k, k+3, k+6, k+9, or the 4 resource units are numbered as follows: k, k+1, k+2, k+3, where k is an integer greater than or equal to 0; Alternatively, each code division multiplexing group corresponds to 8 independent antenna ports, and any code division multiplexing in each code division multiplexing group includes 8 resource units, and the 8 resource units use a frequency domain OCC with a length of 8. The 8 resource units belong to two adjacent resource blocks in the frequency domain, and the 8 resource units are numbered respectively: k, k+3, k+6, k+9, k+12, k+15, k+18, k+21, or the 8 resource units are numbered respectively: k, k+1, k+2, k+3, k+12, k+13, k+14, k+15.

5. The method according to claim 2, characterized in that The first indication information is further used to indicate the first resource pattern; the second indication information is further used to indicate the third resource pattern.

6. The method according to claim 1, characterized in that The first resource pattern includes six code division multiplexing groups; Each code division multiplexing group corresponds to two independent antenna ports, and any code division multiplexing in each code division multiplexing group includes two resource units, the two resource units use a frequency domain OCC with a length of 2, the two resource units belong to the same resource block, and the two resource units are numbered as k, k+2, or the two resource units are numbered as k, k+6, where k is an integer greater than or equal to 0; Alternatively, each code division multiplexing group corresponds to four independent antenna ports, any code division multiplexing in each code division multiplexing group includes four resource units, the four resource units use a frequency domain OCC with a length of 4, the four resource units belong to the same resource block, and the four resource units are numbered: k, k+1, k+6, k+7; Alternatively, each code division multiplexing group corresponds to 4 independent antenna ports, and any code division multiplexing in each code division multiplexing group includes 4 resource units, and the 4 resource units use a frequency domain OCC with a length of 4. The 4 resource units belong to two adjacent resource blocks, and the 4 resource units are numbered respectively: k, k+1, k+12, k+13.

7. The method according to claim 1, characterized in that The first resource pattern includes four code division multiplexing groups; Among them, the first code division multiplexing group and the second code division multiplexing group of the four code division multiplexing groups correspond to 4 independent antenna ports respectively, the first code division multiplexing group and the second code division multiplexing group are different, and any one of the first code division multiplexing group and the second code division multiplexing group includes 4 resource units, and the 4 resource units use a frequency domain OCC with a length of 4. The 4 resource units belong to the first resource block, and the 4 resource units are numbered as follows: k, k+2, k+4, k+6, and k is greater than or equal to an integer greater than 0; the third code division multiplexing group and the fourth code division multiplexing group of the four code division multiplexing groups correspond to two independent antenna ports respectively, the third code division multiplexing group and the fourth code division multiplexing group are different, any one of the third code division multiplexing group and the fourth code division multiplexing group includes two resource units, the two resource units use a frequency domain OCC with a length of 2, the two resource units belong to a second resource block, and the two resource units are numbered: r, r+2, where r is an integer greater than or equal to 0; Alternatively, each code division multiplexing group corresponds to 4 independent antenna ports, and any code division multiplexing in each code division multiplexing group includes 4 resource units, and the 4 resource units use a frequency domain OCC with a length of 4. The 4 resource units belong to the same resource block or two adjacent resource blocks in the frequency domain, and the 4 resource units are numbered respectively: k, k+2, k+4, k+6.

8. The method according to claim 1, characterized in that The first resource pattern includes three code division multiplexing groups; Among them, each code division multiplexing group corresponds to 8 independent antenna ports, and any code division multiplexing in each code division multiplexing group includes 8 resource units, and the 8 resource units use a frequency domain OCC with a length of 8. The 8 resource units belong to two adjacent resource blocks, and the 8 resource units are numbered as follows: k, k+1, k+6, k+7, k+12, k+13, k+18, k+19, where k is an integer greater than or equal to 0.

9. A communication method, characterized in that: The method comprises: Sending first configuration information of a first radio access technology, where the first configuration information is used to configure a first resource pattern, where the first resource pattern includes P antenna ports; Sending first indication information, where the first indication information is used to indicate a P1 antenna port among the P antenna ports, where resources of the P1 antenna port are orthogonal to resources of the P2 antenna port included in the second resource pattern; and the P antenna ports further include a P3 antenna port, where the P3 antenna port is different from the P1 antenna port, and resources of the P3 antenna port are not orthogonal to resources of the P2 antenna port. The second resource pattern is applicable to a second radio access technology, the first radio access technology and the second radio access technology are different, P, P1, P2, and P3 are positive integers, wherein P1, P2, and P3 are all smaller than P; A demodulation reference signal is sent on the resources of the P1 antenna ports.

10. The method according to claim 9, characterized in that The first configuration information is further used to configure a third resource pattern, where the third resource pattern includes Q antenna ports; and the method further includes: Sending second indication information, where the second indication information is used to indicate Q1 antenna ports among the Q antenna ports, where resources of the Q1 antenna port are not orthogonal to resources of the P2 antenna ports; where Q and Q1 are positive integers, and Q1 is less than or equal to Q; A demodulation reference signal is sent on the resources of the Q1 antenna ports.

11. The method according to claim 10, characterized in that The method further comprises: Third indication information is received, where the third indication information is used to indicate that the terminal supports the first resource pattern and the third resource pattern.

12. The method according to claim 10 or 11, characterized in that The third resource pattern includes three code division multiplexing groups; Each code division multiplexing group corresponds to 4 independent antenna ports, and any code division multiplexing in each code division multiplexing group includes 4 resource units, and the 4 resource units use a frequency domain orthogonal superposition code OCC with a length of 4. The 4 resource units belong to the same resource block, and the 4 resource units are numbered as follows: k, k+3, k+6, k+9, or the 4 resource units are numbered as follows: k, k+1, k+2, k+3, where k is an integer greater than or equal to 0; Alternatively, each code division multiplexing group corresponds to 8 independent antenna ports, and any code division multiplexing in each code division multiplexing group includes 8 resource units, and the 8 resource units use a frequency domain OCC with a length of 8. The 8 resource units belong to two adjacent resource blocks in the frequency domain, and the 8 resource units are numbered respectively: k, k+3, k+6, k+9, k+12, k+15, k+18, k+21, or the 8 resource units are numbered respectively: k, k+1, k+2, k+3, k+12, k+13, k+14, k+15.

13. The method according to claim 10, characterized in that The first indication information is further used to indicate the first resource pattern; the second indication information is further used to indicate the third resource pattern.

14. The method according to claim 9, characterized in that The first resource pattern includes six code division multiplexing groups; Each code division multiplexing group corresponds to two independent antenna ports, and any code division multiplexing in each code division multiplexing group includes two resource units, the two resource units use a frequency domain OCC with a length of 2, the two resource units belong to the same resource block, and the two resource units are numbered as k, k+2, or the two resource units are numbered as k, k+6, where k is an integer greater than or equal to 0; Alternatively, each code division multiplexing group corresponds to four independent antenna ports, any code division multiplexing in each code division multiplexing group includes four resource units, the four resource units use a frequency domain OCC with a length of 4, the four resource units belong to the same resource block, and the four resource units are numbered: k, k+1, k+6, k+7; Alternatively, each code division multiplexing group corresponds to 4 independent antenna ports, and any code division multiplexing in each code division multiplexing group includes 4 resource units, and the 4 resource units use a frequency domain OCC with a length of 4. The 4 resource units belong to two adjacent resource blocks, and the 4 resource units are numbered respectively: k, k+1, k+12, k+13.

15. The method according to claim 9, characterized in that The first resource pattern includes four code division multiplexing groups; Among them, the first code division multiplexing group and the second code division multiplexing group of the four code division multiplexing groups correspond to 4 independent antenna ports respectively, the first code division multiplexing group and the second code division multiplexing group are different, and any one of the first code division multiplexing group and the second code division multiplexing group includes 4 resource units, and the 4 resource units use a frequency domain OCC with a length of 4. The 4 resource units belong to the first resource block, and the 4 resource units are numbered respectively: k, k+2, k+4, k+6, and k is greater than or equal to 0; the third code division multiplexing group and the fourth code division multiplexing group of the four code division multiplexing groups correspond to two independent antenna ports respectively, the third code division multiplexing group and the fourth code division multiplexing group are different, any one of the third code division multiplexing group and the fourth code division multiplexing group includes two resource units, the two resource units use a frequency domain OCC with a length of 2, the two resource units belong to the second resource block, and the two resource units are numbered: r, r+2, where r is an integer greater than or equal to 0; Alternatively, each code division multiplexing group corresponds to 4 independent antenna ports, and any code division multiplexing in each code division multiplexing group includes 4 resource units, and the 4 resource units use a frequency domain OCC with a length of 4. The 4 resource units belong to the same resource block or two adjacent resource blocks in the frequency domain, and the 4 resource units are numbered respectively: k, k+2, k+4, k+6.

16. The method according to claim 9, characterized in that The first resource pattern includes three code division multiplexing groups; Among them, each code division multiplexing group corresponds to 8 independent antenna ports, and any code division multiplexing in each code division multiplexing group includes 8 resource units, and the 8 resource units use a frequency domain OCC with a length of 8. The 8 resource units belong to two adjacent resource blocks, and the 8 resource units are numbered as follows: k, k+1, k+6, k+7, k+12, k+13, k+18, k+19, where k is an integer greater than or equal to 0.

17. A communication device, characterized in that: The method comprises a communication unit and a processing unit, wherein the communication unit and the processing unit are configured to execute the method according to any one of claims 1 to 8 or claims 9 to 16.

18. A communication device, characterized in that: The method comprises a processor and an interface circuit, wherein the interface circuit is used to receive signals from other communication devices and transmit them to the processor or send signals from the processor to other communication devices, and the processor is used to implement the method according to any one of claims 1 to 8 or claims 9 to 16 through a logic circuit or executing code instructions.

19. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program or instruction. When the computer program or instruction is executed by the communication device, the method according to any one of claims 1 to 8 or claims 9 to 16 is implemented.

20. A computer program product, characterized in that The method comprises instructions which, when executed on a computer, cause the computer to perform the method according to any one of claims 1 to 8 or claims 9 to 16.

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