Communication method and apparatus

Abstract

A communication method and apparatus, relating to the technical field of communications, and capable of improving the performance of communication systems when spectrum sharing is performed between different communication systems. The method comprises: receiving first information from a network device, and on the basis of the first information, determining a time domain resource and a frequency domain resource which are not used for first channel transmission. The first information is used for indicating a time domain resource and a frequency domain resource which are not used for first channel transmission. The first information indicating the frequency domain resource not used for first channel transmission comprises the first information indicating one or more subcarriers in one or more resource blocks (RBs) that are not used for first channel transmission. A first channel is a physical uplink shared channel or a physical downlink shared channel.

Description

Communication method and device

[0001] This application claims priority to a Chinese patent application filed with the State Intellectual Property Office on December 28, 2023, with application number 202311849529.6 and entitled “Communication Method and Apparatus,” the entire contents of which are incorporated herein by reference. Technical Field

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

[0003] Spectrum sharing can be performed between different communication systems, such as between the long term evolution (LTE) communication system and the new radio (NR) communication system, and between the NR communication system and future communication systems, to improve spectrum resource utilization.

[0004] Among them, when the LTE communication system and the NR communication system share spectrum, some downlink reference signals or downlink channels in the LTE communication system are sent uninterruptedly. The physical downlink shared channel (PDSCH) of the NR communication system will conflict with these downlink reference signals or downlink channels of the LTE communication system and cause interference, affecting the communication performance of the LTE communication system. Based on this, the NR communication system introduces a rate matching (RM) mechanism to resolve the conflict between the LTE communication system and the NR communication system and improve communication performance.

[0005] However, the above solution is applicable to improving the communication performance between the LTE communication system and the NR communication system, but is not applicable to improving the communication performance between other communication systems (such as the NR communication system and future communication systems). Therefore, when the NR communication system and future communication systems share spectrum, how to improve the communication performance becomes a technical problem that needs to be solved urgently. Summary of the Invention

[0006] The present application provides a communication method and apparatus that can improve communication performance when different communication systems share spectrum.

[0007] In the first aspect, the present application provides a communication method, which can be executed by a terminal device. Unless otherwise specified, the "terminal device" in the present application can refer to the terminal device itself, or a component in the terminal device (such as a processor, chip, or chip system, etc.), or a logic module or software that can realize all or part of the terminal device functions. The method is applied to a first radio access technology RAT, and the method includes: receiving first information from a network device, and determining time domain resources and frequency domain resources that are not used for first channel transmission based on the first information. The first information is used to indicate time domain resources and frequency domain resources that are not used for first channel transmission; the first information indicates that the frequency domain resources not used for first channel transmission include one or more subcarriers in one or more resource blocks RB indicated by the first information that are not used for first channel transmission; the first channel is a physical uplink shared channel or a physical downlink shared channel.

[0008] Based on the first aspect, the terminal device can determine the time domain resources and frequency domain resources not used for the first channel transmission based on the first information, thereby avoiding signal conflicts and improving the performance of the communication system when different communication systems share spectrum.

[0009] In one possible design, the first information includes configuration information of one or more rate matching patterns; wherein the time-frequency resources associated with the rate matching pattern are time domain resources and frequency domain resources that are not used for first channel transmission.

[0010] Based on this possible design, the network device can configure the time domain resources and frequency domain resources not used for the first channel transmission to the terminal device in a rate matching pattern based on the rate matching mechanism.

[0011] In one possible design, the configuration information of each rate matching pattern includes first indication information and second indication information; wherein the first indication information is used to indicate one or more RBs associated with the rate matching pattern, and the second indication information is used to indicate one or more subcarriers in the one or more RBs associated with the rate matching pattern.

[0012] Based on this possible design, the RB and subcarrier can be indicated respectively through different indication information, providing a feasible solution for the design of the configuration information of the rate matching pattern.

[0013] In one possible design, the first indication information is a bit map, and each bit in the bit map is used to indicate whether the RB corresponding to each bit belongs to a rate matching pattern.

[0014] Based on this possible design, a feasible solution is provided for the design of the first indication information. It is understandable that the bitmap is a representation of the first indication information, and the first indication information can also be any other representation that can be used to indicate one or more RBs associated with the rate matching pattern, without limitation.

[0015] In one possible design, for each rate matching pattern, the second indication information is used to indicate a subcarrier pattern commonly associated with all RBs associated with the rate matching pattern, where the subcarrier pattern includes one or more subcarriers in an RB;

[0016] Based on this possible design, the subcarrier patterns associated with each RB in all RBs associated with the same rate matching pattern are the same. The second indication information can indicate one or more subcarriers associated with the rate matching pattern by indicating a subcarrier pattern, which can reduce signaling overhead.

[0017] In one possible design, for each rate matching pattern, the second indication information is used to indicate the subcarrier patterns respectively associated with all RBs associated with the rate matching pattern, where the subcarrier pattern includes one or more subcarriers in an RB.

[0018] Based on this possible design, the subcarrier patterns associated with each RB are indicated separately, and the subcarrier patterns associated with any two RBs among all RBs associated with the same rate matching pattern can be the same or different. The second indication information can improve the indication flexibility of the subcarriers associated with the rate matching pattern and improve the communication performance by indicating the subcarrier pattern associated with each RB.

[0019] In one possible design, the configuration information of each rate matching pattern includes third indication information; wherein the third indication information is used to indicate one or more RBs associated with the rate matching pattern and one or more subcarriers associated in the one or more RBs.

[0020] Based on this possible design, the RB and subcarrier may also be indicated by the same indication information, providing another feasible solution for the design of the configuration information of the rate matching pattern.

[0021] In one possible design, the third indication information includes N*M bits, where N is the number of RBs corresponding to the third indication information, and each RB corresponds to M bits; the M bits corresponding to each RB are used to indicate whether the RB corresponding to the M bits belongs to a rate matching pattern and an RB-associated subcarrier pattern.

[0022] In one possible design, the first value of the M bits is used to indicate that the RB corresponding to the M bits does not belong to the rate matching pattern; or, the second value of the M bits is used to indicate that the RB corresponding to the M bits belongs to the rate matching pattern, and the RB is associated with the first subcarrier pattern; or, the third value of the M bits is used to indicate that the RB corresponding to the M bits belongs to the rate matching pattern, and the RB is associated with the second subcarrier pattern; or, the fourth value of the M bits is used to indicate that the RB corresponding to the M bits belongs to the rate matching pattern, and the RB is associated with the third subcarrier pattern; or, the fifth value of the M bits is used to indicate that the RB corresponding to the M bits belongs to the rate matching pattern, and the RB is associated with the fourth subcarrier pattern.

[0023] Based on this possible design, multiple feasible solutions are provided for the design of the values ​​of M bits.

[0024] In one possible design, the subcarrier pattern is one of the following subcarrier patterns: a first subcarrier pattern, the first subcarrier pattern includes all subcarriers in an RB; a second subcarrier pattern, the second subcarrier pattern includes the 1st, 3rd, 5th, 7th, 9th, and 11th subcarriers in an RB; a third subcarrier pattern, the third subcarrier pattern includes the 1st, 2nd, 7th, and 8th subcarriers in an RB; and a fourth subcarrier pattern, the fourth subcarrier pattern includes the 1st, 2nd, 3rd, 4th, 7th, 8th, 9th, and 10th subcarriers in an RB.

[0025] Based on this possible design, the frequency domain resources of the rate matching pattern of the first RAT can be defined in conjunction with the frequency domain resource design of the DMRS of the second channel of the second RAT. This ensures that when the first RAT and the second RAT share spectrum, the first channel of the first RAT is not transmitted on the frequency domain resources of the DMRS of the second channel of the second RAT, or vice versa, the second channel of the second RAT is not transmitted on the frequency domain resources of the DMRS of the first channel of the first RAT, thereby maintaining DMRS orthogonality and improving communication performance.

[0026] In one possible design, the configuration information of each rate matching pattern also includes fourth indication information; wherein the fourth indication information is used to indicate the time domain period of the rate matching pattern and the time domain resource pattern within the period.

[0027] In one possible design, the configuration information of each rate matching pattern may include tenth indication information, where the tenth indication information is used to indicate symbols associated with the rate matching pattern in one or more time slots / subframes.

[0028] In one possible design, candidate values ​​for the time domain period include one or more of the following: 1, 2, 4, 5, 8, 10, 20, 40, 80, 160, or 320 time units. Each time unit includes one or more time slots or subframes corresponding to the rate matching pattern. For example, each time unit may include one or more time slots / subframes corresponding to the tenth indication information.

[0029] Based on the three possible designs described above, the time domain resources of the rate matching pattern of the first RAT can be defined in conjunction with the time domain resource design of the DMRS of the second channel of the second RAT. This ensures that when the first RAT and the second RAT share spectrum, the first channel of the first RAT is not transmitted on the time domain resources of the DMRS of the second channel of the second RAT, or vice versa, the second channel of the second RAT is not transmitted on the time domain resources of the DMRS of the first channel of the first RAT, thereby maintaining DMRS orthogonality and improving communication performance.

[0030] In one possible design, the rate matching pattern is a rate matching pattern exclusive to the bandwidth part BWP; or, the rate matching pattern is a rate matching pattern common to the cell.

[0031] Based on this possible design, if a rate matching pattern is configured for a BWP, the rate matching pattern is effective for the associated BWP, or described as effective for the first channel on the associated BWP. If a rate matching pattern is configured for a serving cell, the rate matching pattern can be effective for all BWPs in the serving cell, or described as effective for the first channel on all BWPs in the serving cell.

[0032] In one possible design, the method also includes: receiving fifth indication information from the network device; wherein the fifth indication information is used to indicate an effective rate matching pattern among one or more rate matching patterns.

[0033] In one possible design, the one or more subcarriers indicated by the first information include all subcarriers in an RB; or, the one or more subcarriers indicated by the first information include the 1st, 3rd, 5th, 7th, 9th, and 11th subcarriers in an RB; or, the one or more subcarriers indicated by the first information include the 1st, 2nd, 7th, and 8th subcarriers in an RB; or, the one or more subcarriers indicated by the first information include the 1st, 2nd, 3rd, 4th, 7th, 8th, 9th, and 10th subcarriers in an RB.

[0034] In one possible design, time domain resources and frequency domain resources are determined based on a demodulation reference signal DMRS of a second channel of a second RAT; wherein the second channel is a physical uplink shared channel or a physical downlink shared channel.

[0035] Based on this possible design, the time-domain resources and frequency-domain resources of the rate-matching pattern of the first RAT can be defined in conjunction with the time-domain resource design of the DMRS of the second channel of the second RAT. This ensures that when the first RAT and the second RAT share spectrum, the first channel of the first RAT is not transmitted on the time-frequency resources of the DMRS of the second channel of the second RAT, or vice versa, the second channel of the second RAT is not transmitted on the time-frequency resources of the DMRS of the first channel of the first RAT, thereby maintaining DMRS orthogonality and improving communication performance.

[0036] On the second aspect, the present application provides a communication method, which can be executed by a network device. Unless otherwise specified, the "network device" in this application can refer to the network device itself, or a component in the network device (such as a processor, chip, or chip system, etc.), or a logical module or software that can realize all or part of the network device functions. The method is applied to a first RAT, and the method includes: determining first information; sending first information to a terminal device; wherein the first information is used to indicate time domain resources and frequency domain resources that are not used for first channel transmission, and the first information indicates that the frequency domain resources not used for first channel transmission include one or more subcarriers in one or more resource blocks RBs that are not used for first channel transmission; the first channel is a physical uplink shared channel or a physical downlink shared channel.

[0037] Based on the second aspect, the network device can indicate to the terminal device through the first information the time domain resources and frequency domain resources that are not used for the first channel transmission, thereby avoiding signal conflicts and improving the performance of the communication system when different communication systems share spectrum.

[0038] In one possible design, the first information includes configuration information of one or more rate matching patterns; wherein the time-frequency resources associated with the rate matching pattern are time domain resources and frequency domain resources that are not used for first channel transmission.

[0039] Based on this possible design, the network device can configure the time domain resources and frequency domain resources not used for the first channel transmission to the terminal device in a rate matching pattern based on the rate matching mechanism.

[0040] In one possible design, the method also includes: sending fifth indication information to the terminal device; wherein the fifth indication information is used to indicate an effective rate matching pattern among one or more rate matching patterns.

[0041] It can be understood that the description of the first information in the second aspect can refer to the relevant description of the first information in the above-mentioned first aspect or any possible design of the first aspect, and will not be repeated here.

[0042] In a third aspect, the present application provides a communication method, which can be executed by a terminal device. Unless otherwise specified, the "terminal device" in the present application can refer to the terminal device itself, or a component in the terminal device (such as a processor, chip, or chip system, etc.), or a logical module or software that can realize all or part of the functions of the terminal device. The method is applied to a first RAT, and the method includes: receiving second information from a network device; the second information may include configuration information of one or more demodulation reference signals (DMRS) of a second channel of the second RAT; the second channel is a physical uplink shared channel or a physical downlink shared channel; based on the second information, determining the time-frequency resources associated with the second information, and the time-frequency resources associated with the second information are not used for transmission of the first channel of the first RAT; the first channel is a physical uplink shared channel or a physical downlink shared channel.

[0043] Based on the third aspect, the network device can directly configure the configuration information of the DMRS that needs to be rate matched to the terminal device through the second information. The terminal device determines the time-frequency resources of the DMRS based on the DMRS configuration information, and can determine the time-frequency resources that are not used for the first channel transmission of the first RAT. That is, when the first RAT and the second RAT share the spectrum, the first channel of the first RAT and the second channel of the second RAT can be transmitted using time division multiplexing. The first channel of the first RAT is silent on the time-frequency resources of the DMRS of the second channel of the second RAT, or in other words, the first channel of the first RAT does not send data on the time-frequency resources of the DMRS of the second channel of the second RAT, so as to avoid the data transmission of the first channel of the first RAT interfering with the DMRS transmission of the second channel of the second RAT, keep the DMRS of the first channel of the first RAT and the DMRS of the second channel of the second RAT orthogonal to each other, and improve communication performance.

[0044] In one possible design, the configuration information of each DMRS includes at least one of the following: DMRS type, number of DMRS symbols, DMRS time domain position, DMRS frequency domain resources, and data-free DMRS code division multiplexing CDM group.

[0045] Based on this possible design, multiple feasible solutions are provided for the design of DMRS configuration information.

[0046] In one possible design, the method also includes: receiving sixth indication information from the network device; wherein the sixth indication information is used to indicate the effective DMRS configuration information among the configuration information of one or more DMRSs.

[0047] In one possible design, among the configuration information of one or more DMRSs, there is at least one DMRS configuration information including seventh indication information; wherein the seventh indication information is used to indicate that the time-frequency resources associated with the DMRS are not used for the first channel transmission of the first RAT.

[0048] Based on this possible design, DMRS can be extended. For example, two types of DMRS can be defined in the first RAT, and the first DMRS is used for transmission and demodulation of the first channel. The role of the second DMRS is different from that of the first DMRS. The time-frequency resources of the second DMRS are neither used for transmission of the first channel nor for demodulation of the first channel. They are only used to define time-frequency resources that are not used for transmission of the first channel of the first RAT. For the second type of DMRS, if the first channel is PDSCH, the terminal device does not make any assumptions about the signal transmitted on the time-frequency resources of this type of DMRS. If the first channel is PUSCH, the terminal device may not send this type of DMRS. Among the configuration information of one or more DMRSs, the configuration information of at least one DMRS includes the seventh indication information, and the DMRS corresponding to the seventh indication information is the above-mentioned second type of DMRS.

[0049] In a fourth aspect, the present application provides a communication method that can be executed by a network device. Unless otherwise specified, the "network device" in this application can refer to the network device itself, or a component in the network device (such as a processor, chip, or chip system, etc.), or a logic module or software that can implement all or part of the network device functions. The method is applied to a first RAT, and the method includes: determining second information; sending the second information to a terminal device; wherein the second information includes configuration information of one or more demodulation reference signals (DMRS) of a second channel of the second RAT; the second channel is a physical uplink shared channel or a physical downlink shared channel; the time-frequency resources associated with the second information are not used for transmission of the first channel of the first RAT, and the first channel is a physical uplink shared channel or a physical downlink shared channel.

[0050] Based on the fourth aspect, the network device can directly configure the configuration information of the DMRS that needs to be rate matched to the terminal device through the second information. The terminal device determines the time-frequency resources of the DMRS based on the DMRS configuration information, and can determine the time-frequency resources that are not used for the first channel transmission of the first RAT. That is, when the first RAT and the second RAT share the spectrum, the first channel of the first RAT and the second channel of the second RAT can be transmitted using time division multiplexing. The first channel of the first RAT is silent on the time-frequency resources of the DMRS of the second channel of the second RAT, or in other words, the first channel of the first RAT does not send data on the time-frequency resources of the DMRS of the second channel of the second RAT, so as to avoid the data transmission of the first channel of the first RAT interfering with the DMRS transmission of the second channel of the second RAT, keep the DMRS of the first channel of the first RAT and the DMRS of the second channel of the second RAT orthogonal to each other, and improve communication performance.

[0051] In one possible design, the method also includes: sending sixth indication information to the terminal device; wherein the sixth indication information is used to indicate the effective DMRS configuration information among one or more DMRS configuration information.

[0052] It can be understood that the description of the second information in the fourth aspect can refer to the relevant description of the second information in the above-mentioned third aspect or any possible design of the third aspect, and will not be repeated here.

[0053] Fifthly, the present application provides a communication method, which can be executed by a terminal device. Unless otherwise specified, the "terminal device" in this application can refer to the terminal device itself, or a component in the terminal device (such as a processor, chip, or chip system, etc.), or it can also refer to a logical module or software that can realize all or part of the functions of the terminal device. The method is applied to a first RAT, and includes: receiving eighth indication information from a network device; wherein the eighth indication information is used to indicate a first demodulation reference signal DMRS port set, the first DMRS port set is used for a first channel of the first RAT, and the first channel is a physical uplink shared channel or a physical downlink shared channel; receiving ninth indication information from the network device; wherein the ninth indication information is used to indicate a reference frequency position corresponding to the DMRS of the first channel of the first RAT, and the reference frequency position is a starting frequency position for generating the DMRS of the first channel of the first RAT; according to the eighth indication information and the ninth indication information, using one or more DMRS ports in the first DMRS port set to receive the DMRS of the first channel of the first RAT, wherein the first channel is a physical downlink shared channel; or, using one or more DMRS ports in the first DMRS port set to send the DMRS of the first channel of the first RAT, wherein the first channel is a physical uplink shared channel.

[0054] Based on the fifth aspect, the network device can ensure that the first RAT and the second RAT use the same base sequence on the same time-frequency resources by indicating the reference frequency position to the terminal device, thereby improving communication system performance. At the same time, the network device can also indicate the first DMRS port set to the terminal device, so that the terminal device uses one or more DMRS ports in the first DMRS port set to receive or transmit the DMRS of the first channel of the first RAT.

[0055] In one possible design, any DMRS port in the first DMRS port set is associated with 2*Q resource blocks RB, where Q is a positive integer.

[0056] Based on this possible design, the DMRS port can be expanded in the frequency domain to improve communication performance.

[0057] In one possible design, the first DMRS port set includes three code division multiplexing CDM groups, each CDM group includes one or more DMRS ports in the first DMRS port set, wherein any DMRS port in the first CDM group is associated with the 1st, 2nd, 7th, and 8th subcarriers of each RB in 2*Q RBs, any DMRS port in the second CDM group is associated with the 3rd, 4th, 9th, and 10th subcarriers of each RB in 2*Q RBs, and any DMRS port in the third CDM group is associated with the 5th, 6th, 11th, and 12th subcarriers of each RB in 2*Q RBs.

[0058] Based on this possible design, when frequency domain expansion is performed on the DMRS port, the association relationship between the DMRS port and the subcarrier may be as shown above, providing a feasible method for designing the subcarrier associated with the DMRS port.

[0059] In one possible design, any DMRS port in the first DMRS port set is associated with a frequency domain orthogonal mask OCC with a length of 8*Q.

[0060] Based on this possible design, frequency domain extension can be performed by using an OCC with a longer length in the frequency domain.

[0061] In one possible design, the first DMRS port set is associated with 4*P time domain symbols, where P is a positive integer.

[0062] Based on this possible design, the DMRS port can also be extended in the time domain to improve communication performance.

[0063] In one possible design, any DMRS port in the first DMRS port set is associated with 2 time domain symbols out of 4*P time domain symbols.

[0064] In one possible design, the first DMRS port set includes 2*P DMRS port subsets, each DMRS port subset includes one or more DMRS ports in the first DMRS port set, and each DMRS port subset is associated with 2 time domain symbols out of 4*P time domain symbols.

[0065] In one possible design, any DMRS port in the first DMRS port set is associated with a time domain OCC with a length of 2.

[0066] In one possible design, any DMRS port in the first DMRS port set is associated with all time domain symbols in 4*P time domain symbols.

[0067] In one possible design, any DMRS port in the first DMRS port set is associated with a time-domain OCC with a length of 4*P.

[0068] Based on the above five possible designs, multiple feasible solutions are provided for the design of the association relationship between DMRS ports and time domain symbols. More DMRS ports can be supported by increasing the number of time domain symbols corresponding to the DMRS ports.

[0069] In one possible design, the ninth indication information includes the absolute wireless frequency channel number corresponding to the reference frequency position; or, the ninth indication information includes the common resource block CRB index corresponding to the reference frequency position.

[0070] In one possible design, the base sequence corresponding to the DMRS port in the first DMRS port set is the same as the base sequence corresponding to the DMRS port in the second DMRS port set, wherein the second DMRS port set is used for the second channel of the second RAT, and the second channel is a physical uplink shared channel or a physical downlink shared channel.

[0071] In one possible design, the reference frequency position corresponding to the DMRS of the first channel of the first RAT is the same as the reference frequency position corresponding to the DMRS of the second channel of the second RAT.

[0072] Based on the above three possible designs, the reference frequency position corresponding to the DMRS of the first channel of the first RAT may not be fixed to subcarrier 0 of CRB 0, but the network device may indicate the reference frequency position corresponding to the DMRS of the first channel of the first RAT through the ninth indication information, thereby ensuring that the reference frequency position corresponding to the DMRS of the first channel of the first RAT and the reference frequency position corresponding to the DMRS of the second channel of the second RAT are the same, ensuring that on the same time-frequency resources, the base sequence used by the DMRS of the first channel of the first RAT and the DMRS of the second channel of the second RAT remain the same, so that the DMRS of the first channel of the first RAT and the DMRS of the second channel of the second RAT can remain orthogonal to each other, thereby improving the performance of the communication system.

[0073] In a sixth aspect, the present application provides a communication method, which can be executed by a network device. Unless otherwise specified, the "network device" in this application can refer to the network device itself, or a component in the network device (such as a processor, chip, or chip system, etc.), or it can also refer to a logical module or software that can realize all or part of the functions of the network device. The method is applied to a first RAT, and the method includes: sending eighth indication information to a terminal device; wherein the eighth indication information is used to indicate a first demodulation reference signal DMRS port set; the first DMRS port set is used for a first channel of the first RAT, and the first channel is a physical uplink shared channel or a physical downlink shared channel; sending ninth indication information to the terminal device; wherein the ninth indication information is used to indicate a reference frequency position corresponding to the DMRS of the first channel of the first RAT, and the reference frequency position is a starting frequency position for generating the DMRS of the first channel of the first RAT; according to the eighth indication information and the ninth indication information, using one or more DMRS ports in the first DMRS port set to receive the DMRS of the first channel of the first RAT, wherein the first channel is a physical uplink shared channel; or, using one or more DMRS ports in the first DMRS port set to send the DMRS of the first channel of the first RAT, wherein the first channel is a physical downlink shared channel.

[0074] Based on the sixth aspect, the network device may ensure that the first RAT and the second RAT use the same base sequence on the same time-frequency resources by indicating the reference frequency position to the terminal device, thereby improving communication system performance. At the same time, the network device may also indicate a first DMRS port set to the terminal device, so that the terminal device uses one or more DMRS ports in the first DMRS port set to receive or transmit the DMRS of the first channel of the first RAT.

[0075] It can be understood that the description of the first DMRS port set and the ninth indication information in the sixth aspect can refer to the relevant description of the first DMRS port set and the ninth indication information in the above-mentioned fifth aspect or any possible design of the fifth aspect, and will not be repeated here.

[0076] In the seventh aspect, the present application provides a communication device, which can be applied to the terminal equipment of the first aspect, the third aspect, or the fifth aspect to implement the functions performed by the terminal equipment. The communication device can be a terminal equipment, or it can be a chip or chip system or system on chip, etc. of the terminal equipment. The communication device can perform the functions performed by the terminal equipment through hardware, or it can perform the corresponding software implementation through hardware. The hardware or software includes one or more modules corresponding to the above functions. For example, a transceiver module and a processing module. The transceiver module can independently complete the following transceiver operations, or it can cooperate with the processing module to complete the following transceiver operations; accordingly, the processing module can also independently complete the following processing operations, or it can cooperate with the transceiver module to complete the following processing operations, without limitation.

[0077] Exemplarily, a transceiver module is configured to receive first information from a network device; a processing module is configured to determine, based on the first information, time domain resources and frequency domain resources not used for first channel transmission. The first information indicates the time domain resources and frequency domain resources not used for first channel transmission; the frequency domain resources not used for first channel transmission indicated by the first information include one or more subcarriers in one or more resource blocks (RBs) indicated by the first information as not used for first channel transmission; and the first channel is a physical uplink shared channel or a physical downlink shared channel.

[0078] In another example, the transceiver module is used to receive second information from the network device; the second information may include configuration information of one or more demodulation reference signals DMRS of the second channel of the second RAT; the second channel is a physical uplink shared channel or a physical downlink shared channel; the processing module is used to determine the time-frequency resources associated with the second information based on the second information, and the time-frequency resources associated with the second information are not used for the transmission of the first channel of the first RAT; the first channel is a physical uplink shared channel or a physical downlink shared channel.

[0079] In another example, the transceiver module is used to receive eighth indication information from the network device; wherein the eighth indication information is used to indicate a first demodulation reference signal DMRS port set, the first DMRS port set is used for a first channel of the first RAT, and the first channel is a physical uplink shared channel or a physical downlink shared channel; the transceiver module is also used to receive ninth indication information from the network device; wherein the ninth indication information is used to indicate a reference frequency position corresponding to the DMRS of the first channel of the first RAT, and the reference frequency position is a starting frequency position for generating the DMRS of the first channel of the first RAT; the transceiver module is also used to use one or more DMRS ports in the first DMRS port set to receive the DMRS of the first channel of the first RAT according to the eighth indication information and the ninth indication information, wherein the first channel is a physical downlink shared channel; or, the transceiver module is also used to use one or more DMRS ports in the first DMRS port set to send the DMRS of the first channel of the first RAT, wherein the first channel is a physical uplink shared channel.

[0080] Optionally, the transceiver module and the processing module of the communication device in the seventh aspect can also perform the corresponding functions in the above-mentioned first aspect or any possible design of the first aspect, or perform the above-mentioned third aspect or any possible design of the third aspect, or perform the above-mentioned fifth aspect or any possible design of the fifth aspect. Please refer to the detailed description in the method example for details. The beneficial effects that can be achieved can also be found in the above-mentioned related content, which will not be repeated here.

[0081] In an eighth aspect, the present application provides a communication device, which can be applied to the network equipment of the second aspect, fourth aspect, or sixth aspect above to implement the functions performed by the above network equipment. The communication device can be a network equipment, or it can be a chip or chip system or system on chip, etc. of the network equipment. The communication device can perform the functions performed by the above network equipment through hardware, or it can perform the corresponding software implementation through hardware. The hardware or software includes one or more modules corresponding to the above functions. Such as a transceiver module and a processing module, the transceiver module can independently complete the following transceiver operations, or it can cooperate with the processing module to complete the following transceiver operations; accordingly, the processing module can also independently complete the following processing operations, or it can cooperate with the transceiver module to complete the following processing operations, without limitation.

[0082] Exemplarily, a processing module is used to determine the first information; a transceiver module is used to send the first information to the terminal device; wherein the first information is used to indicate time domain resources and frequency domain resources that are not used for first channel transmission, and the first information indicates that the frequency domain resources that are not used for first channel transmission include the first information indicating one or more subcarriers in one or more resource blocks RB that are not used for first channel transmission; the first channel is a physical uplink shared channel or a physical downlink shared channel.

[0083] In another example, a processing module is used to determine the second information; a transceiver module is used to send the second information to the terminal device; wherein the second information includes configuration information of one or more demodulation reference signals DMRS of the second channel of the second RAT; the second channel is a physical uplink shared channel or a physical downlink shared channel; the time-frequency resources associated with the second information are not used for the transmission of the first channel of the first RAT, and the first channel is a physical uplink shared channel or a physical downlink shared channel.

[0084] In another example, the transceiver module is used to send eighth indication information to the terminal device; wherein the eighth indication information is used to indicate the first demodulation reference signal DMRS port set; the first DMRS port set is used for the first channel of the first RAT, and the first channel is a physical uplink shared channel or a physical downlink shared channel; the transceiver module is also used to send ninth indication information to the terminal device; wherein the ninth indication information is used to indicate the reference frequency position corresponding to the DMRS of the first channel of the first RAT, and the reference frequency position is the starting frequency position generated by the DMRS of the first channel of the first RAT; the transceiver module is also used to use one or more DMRS ports in the first DMRS port set to receive the DMRS of the first channel of the first RAT according to the eighth indication information and the ninth indication information, wherein the first channel is a physical uplink shared channel; or, the transceiver module is also used to use one or more DMRS ports in the first DMRS port set to send the DMRS of the first channel of the first RAT, wherein the first channel is a physical downlink shared channel.

[0085] Optionally, the transceiver module and the processing module of the communication device in the eighth aspect can also perform the corresponding functions in the above-mentioned second aspect or any possible design of the second aspect, or perform the above-mentioned fourth aspect or any possible design of the fourth aspect, or perform the above-mentioned sixth aspect or any possible design of the sixth aspect. Please refer to the detailed description in the method example for details. The beneficial effects that can be achieved can also be found in the above-mentioned related content, which will not be repeated here.

[0086] In the ninth aspect, the present application provides a communication device, which includes one or more processors; one or more processors are used to run computer programs or instructions, and when the one or more processors execute the computer instructions or instructions, the communication method described in any one of the first to sixth aspects is executed.

[0087] In one possible design, the communication device further includes one or more memories, the one or more memories being coupled to one or more processors, and the one or more memories being used to store the above-mentioned computer programs or instructions. In one possible implementation, the memory is located outside the communication device. In another possible implementation, the memory is located within the communication device. In this application, the processor and memory may also be integrated into one device, that is, the processor and memory may also be integrated together. In one possible implementation, the communication device further includes a transceiver, and the transceiver is used to receive information and / or send information.

[0088] In one possible design, the communication device further includes one or more communication interfaces, the one or more communication interfaces are coupled to one or more processors, and the one or more communication interfaces are used to communicate with other modules outside the communication device.

[0089] In the tenth aspect, the present application provides a communication device, which includes an interface circuit and a logic circuit; the interface circuit is used to input and / or output information; the logic circuit is used to execute the communication method described in any one of the first to sixth aspects, and process and / or generate information based on the information.

[0090] In the eleventh aspect, the present application provides a computer-readable storage medium, which stores computer instructions or programs. When the computer instructions or programs are run on a computer, the communication method described in any one of the first to sixth aspects is executed.

[0091] In a twelfth aspect, the present application provides a computer program product comprising computer instructions, which, when executed on a computer, enables the communication method as described in any one of the first to sixth aspects to be executed.

[0092] In a thirteenth aspect, the present application provides a computer program, which, when executed on a computer, enables the communication method described in any one of the first to sixth aspects to be executed.

[0093] In the fourteenth aspect, the present application provides a chip, comprising: a processor, the processor being coupled to a memory, the memory being used to store programs or instructions, and when the programs or instructions are executed by the processor, the communication method described in any one of the first to sixth aspects is executed.

[0094] Among them, the technical effects brought about by any design method in the ninth to fourteenth aspects can refer to the technical effects brought about by any one of the first to sixth aspects mentioned above, and will not be repeated here.

[0095] In aspect fifteen, the present application provides a communication system, which may include a communication device for executing the first aspect or any possible design of the first aspect and a communication device for executing the second aspect or any possible design of the second aspect, or, includes a communication device for executing the third aspect or any possible design of the third aspect and a communication device for executing the fourth aspect or any possible design of the fourth aspect, or, includes a communication device for executing the fifth aspect or any possible design of the fifth aspect and a communication device for executing the sixth aspect or any possible design of the sixth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0096] FIG1 is a schematic diagram of spectrum sharing provided in an embodiment of the present application;

[0097] FIG2 is a schematic diagram of dynamic spectrum sharing provided in an embodiment of the present application;

[0098] FIG3 is a schematic diagram of rate matching at an RE level granularity provided in an embodiment of the present application;

[0099] FIG4 is a schematic diagram of rate matching at an RB / symbol level granularity provided in an embodiment of the present application;

[0100] FIG5 is a schematic diagram of space division multiplexing provided in an embodiment of the present application;

[0101] FIG6 is a schematic diagram of a communication system provided in an embodiment of the present application;

[0102] FIG7 is a schematic diagram of a communication system provided in an embodiment of the present application;

[0103] FIG8 is a schematic diagram of a communication device provided in an embodiment of the present application;

[0104] FIG9 is a schematic diagram of a communication method provided in an embodiment of the present application;

[0105] FIG10 is a schematic diagram of the structure of a DMRS provided in an embodiment of the present application;

[0106] FIG11 is a schematic diagram of a subcarrier pattern provided in an embodiment of the present application;

[0107] FIG12 is a schematic diagram of time-frequency resources of a DMRS of a first channel of a first RAT and a second channel of a second RAT provided in an embodiment of the present application;

[0108] FIG13 is a schematic diagram of a communication method provided in an embodiment of the present application;

[0109] FIG14 is a schematic diagram of a communication method provided in an embodiment of the present application;

[0110] FIG15 is a schematic diagram of a first DMRS port set and a second DMRS port set provided in an embodiment of the present application;

[0111] FIG16 is a schematic diagram of a reference frequency position corresponding to a DMRS of a second channel of a 5G communication system provided in an embodiment of the present application;

[0112] FIG17 is a schematic diagram of reference frequency positions corresponding to a DMRS of a second channel of a 5G communication system and a DMRS of a first channel of a 6G communication system provided in an embodiment of the present application;

[0113] FIG18 is a schematic diagram of time-frequency resources of a DMRS of a first channel of a first RAT and a DMRS of a second channel of a second RAT provided by an embodiment of the present application;

[0114] FIG19 is a schematic diagram of time-frequency resources of a DMRS of a first channel of a first RAT and a DMRS of a second channel of a second RAT provided by an embodiment of the present application;

[0115] FIG20 is a schematic diagram of time-frequency resources of a DMRS of a first channel of a 6G communication system and a DMRS of a second channel of a 5G communication system provided in an embodiment of the present application;

[0116] FIG21 is a schematic diagram of time-frequency resources of a DMRS of a first channel of a 6G communication system and a DMRS of a second channel of a 5G communication system provided in an embodiment of the present application;

[0117] FIG22 is a schematic diagram of a communication device provided in an embodiment of the present application;

[0118] Figure 23 is a schematic diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0119] Before describing the embodiments of the present application, the technical terms involved in the embodiments of the present application are described.

[0120] Spectrum sharing: Different communication systems can be deployed on the same spectrum to improve spectrum resource utilization.

[0121] For example, as shown in Figure 1, future communication systems (such as the sixth-generation (6G) communication system), 5G new radio (NR) communication system (or referred to as 5G communication system, NR communication system), 4G long term evolution (LTE) communication system (or referred to as 4G communication system, LTE communication system), and even 3G communication system and other radio access technologies (RAT) can be deployed on the same spectrum.

[0122] Among them, taking the NR communication system and the LTE communication system as an example, the NR communication system and the LTE communication system can realize spectrum sharing based on dynamic spectrum sharing (DSS). As shown in Figure 2, the NR communication system and the LTE communication system can dynamically use the frequency resources in the shared spectrum for data transmission, rather than semi-statically allocating the frequency resources in the shared spectrum to the NR communication system and the LTE communication system. In addition, when dynamic spectrum sharing is performed between the NR communication system and the LTE communication system, more consideration is given to frequency division multiplexing or time division multiplexing between the signals of the NR communication system and the signals of the LTE communication system, that is, using different frequency resources or time resources to send the signals of the two RATs. For data channels or control channels, both can be achieved through dynamic scheduling of network equipment.

[0123] However, in the LTE communication system, some downlink reference signals or downlink channels are sent continuously (always-on) and are not dynamically scheduled by network equipment, such as cell reference signal (CRS), primary synchronization signal (PSS), secondary synchronization signal (SSS), physical broadcast channel (PBCH), etc. Based on this, the physical downlink shared channel (PDSCH) of the NR communication system will conflict with these downlink reference signals / downlink channels of the LTE communication system and cause interference, affecting the transmission performance of these downlink reference signals / downlink channels of the LTE communication system. In order to solve this problem, the NR communication system introduces a rate matching (RM) mechanism, that is, when the PDSCH of the NR communication system conflicts with the downlink reference signals / downlink channels such as CRS, PSS, SSS, PBCH of the LTE communication system, the PDSCH of the NR communication system is not transmitted on the time-frequency resources of the downlink reference signals / downlink channels such as CRS, PSS, SSS, PBCH of the LTE communication system, and the PDSCH of the NR communication system performs rate matching on these time-frequency resources. Depending on the design of the downlink reference signal / downlink channel to resolve the conflict, the downlink rate matching mechanism supported by the NR communication system is also different.

[0124] Among them, for the CRS of the LTE communication system, since the CRS of the LTE communication system is not continuously mapped in the frequency domain, but is mapped on one RE in every three resource elements (RE), therefore, as shown in Figure 3, the PDSCH of the NR communication system supports rate matching at the RE-level granularity when mapping resources to avoid conflicts with the CRS of the LTE communication system. In addition, the network equipment of the NR communication system can configure the relevant parameters of the CRS of the LTE communication system to the terminal equipment of the NR communication system through signaling. The terminal equipment of the NR communication system can determine the time-frequency resource position of the CRS of the LTE communication system based on the relevant parameters of the CRS, and can determine the time-frequency resource position that needs to be rate matched when mapping the PDSCH resources of the NR communication system.

[0125] Among them, for the PSS, SSS, and PBCH of the LTE communication system, they can occupy one or more orthogonal frequency division multiplex symbols (orthogonal frequency division multiplex, OFDM symbol) in the time domain and multiple resource blocks (resource block, RB) in the frequency domain. Therefore, as shown in Figure 4, the PDSCH of the NR communication system can support rate matching at the RB / symbol level (RB / symbol-level) granularity during resource mapping to avoid conflicts with these signals / channels of the LTE communication system. In addition, unlike the conflict resolution method of the CRS of the above-mentioned LTE communication system, the network equipment of the NR communication system does not directly configure the relevant parameters of the downlink reference signals / downlink channels such as the PSS, SSS, and PBCH of the LTE communication system to the terminal equipment of the NR communication system through signaling, but instead notifies the terminal equipment of the time-frequency resource pattern of the PDSCH rate matching of the NR communication system.

[0126] Specifically, the network device can configure one or more rate matching patterns for PDSCH. The configuration information of each rate matching pattern includes the following information: RB (resourceBlocks), the symbol corresponding to the RB (symbolsInResourceBlock), and the period and pattern (periodicityAndPattern). Among them, resourceBlocks can be an RB level bitmap format, where each bit corresponds to an RB. When the value of the bit is '1', it indicates that the RB corresponding to the bit belongs to the rate matching pattern, otherwise, it does not belong to the rate matching pattern. symbolsInResourceBlock can be a symbol level bitmap format, where each bit corresponds to a time slot (slot) or a symbol in two time slots. When the value of the bit is '1', it indicates that the symbol corresponding to the bit belongs to the rate matching pattern, otherwise, it does not belong to the rate matching pattern. periodicityAndPattern can be a bitmap format. For a pair of the RB level bitmap and the symbol level bitmap, periodicityAndPattern is used to configure a periodic time domain pattern. Each bit corresponds to a unit, which is equal to the duration of the symbol level bitmap mentioned above. When the value of the bit is '1', it means that the unit corresponding to the bit appears, otherwise, the unit does not appear.

[0127] Optionally, the network device can also be configured with two rate matching pattern groups, each rate matching pattern group can contain one or more rate matching patterns from multiple rate matching patterns, and dynamically indicate which rate matching pattern in the rate matching pattern group is effective by scheduling the rate matching indicator field in the downlink control information (DCI).

[0128] In the above description, the NR communication system can resolve signal conflicts between the LTE communication system and the NR communication system by introducing the above rate matching mechanism, thereby improving communication performance. However, the above method is not applicable to resolving signal conflicts when other communication systems share spectrum.

[0129] For example, for the NR communication system and the 6G communication system, when considering spectrum sharing, in addition to considering frequency division multiplexing or time division multiplexing between the signals of the two communication systems, a more efficient multiplexing method, space division multiplexing, can also be considered. Among them, space division multiplexing refers to the use of multiple spatially orthogonal channels for multiple signals on the same time-frequency resources. For example, as shown in Figure 5, signal transmission can be achieved based on space division multiplexing between the PDSCH and the physical uplink shared channel (PUSCH) of the NR communication system or the PDSCH / PUSCH of the 6G communication system. If spatial division multiplexing is used to resolve signal conflicts between the signals of the 6G communication system and the NR communication system, especially for conflicts between the PDSCH and the physical uplink shared channel (PUSCH) of the two communication systems, it is necessary to ensure that the demodulation reference signal (DMRS) of the PDSCH / PUSCH of the 6G communication system is orthogonal to the DMRS of the PDSCH / PUSCH of the NR communication system. Otherwise, the DMRS of the PDSCH / PUSCH of the NR communication system or the 6G communication system will be interfered with, resulting in a degradation of the demodulation performance of the PDSCH / PUSCH of the NR communication system or the 6G communication system.

[0130] However, there is no solution to ensure that the DMRS between the two communication systems remains orthogonal. In addition, if the rate matching mechanism of the NR communication system is reused to resolve the conflict between the PDSCH / PUSCH of the NR communication system and the PDSCH / PUSCH of the 6G communication system, there are also the following problems: ① The NR communication system defines downlink rate matching, that is, the rate matching mechanism for PDSCH, and does not support uplink rate matching, and cannot resolve the conflict between the PUSCH of one RAT and the PUSCH / PDSCH of another RAT; ② The rate matching pattern defined by the NR communication system is inconsistent with the DMRS pattern of PDSCH / PUSCH, and the rate matching mechanism of the NR communication system cannot be directly reused.

[0131] In summary, when different communication systems share spectrum, how to improve communication performance becomes a technical problem that needs to be solved urgently.

[0132] To solve the above technical problems, the present application proposes a communication method, in which a terminal device can receive first information from a network device and, based on the first information, determine time domain resources and frequency domain resources not used for first channel transmission. The first information is used to indicate the time domain resources and frequency domain resources not used for first channel transmission; the frequency domain resources not used for first channel transmission indicated by the first information include one or more subcarriers in one or more resource blocks (RBs) indicated by the first information as not used for first channel transmission; and the first channel is a physical uplink shared channel or a physical downlink shared channel.

[0133] In an embodiment of the present application, the terminal device can determine the time domain resources and frequency domain resources not used for first channel transmission based on the first information, thereby avoiding signal conflicts and improving the performance of the communication system when different communication systems share spectrum.

[0134] The following describes in detail the implementation of the embodiments of the present application in conjunction with the accompanying drawings.

[0135] The communication method provided in the embodiments of the present application can be used in any communication system, which can be a third generation partnership project (3GPP) communication system, for example, an LTE system, and can also be a 5G mobile communication system, a system of LTE and 5G hybrid networking, a NR communication system, an NR vehicle to everything (V2X) system, a device-to-device (D2D) communication system, a machine to machine (M2M) communication system, the Internet of Things (IoT), a narrowband Internet of Things (NB-IoT), a global system for mobile communications (GSM), an enhanced data rate for GSM evolution (EDGE), a wideband code division multiple access (WCDMA), a code division multiple access 2000 (CDMA2000), a time division-synchronization code division multiple access (TD-SCDMA), an enhanced mobile broadband (EMB) system. Broadband (eMBB), ultra-reliable and low-latency communication (URLLC), enhanced machine-type communication (eMTC), and various types of next-generation communication systems, such as 5.5G mobile communication systems and 6G communication systems. Non-terrestrial network (NTN) systems (such as satellite communication systems) and non-3GPP communication systems are also not restricted.

[0136] The communication system provided in the embodiment of the present application is described below using FIG. 6 as an example.

[0137] Figure 6 is a schematic diagram of a communication system provided in an embodiment of the present application. As shown in Figure 6, the communication system 100 may include at least one terminal device (such as terminal devices 101 to terminal devices 106) and at least one network device (such as network device 110).

[0138] The terminal device in Figure 6 can be within the beam / cell coverage of the network device, and the network device can provide communication services to the terminal device. The terminal device can be connected to the network device air interface in the manner shown in Figure 7. For example, the terminal device can communicate with the network device through the air interface via uplink or downlink. For example, the terminal device can send uplink data to the network device via the PUSCH in the uplink direction; the network device can send downlink data to the terminal device via the PDSCH in the downlink direction.

[0139] The terminal device in Figure 6 can be a device with wireless transceiver functions or a chip or chip system that can be set up in the device, which can allow users to access the network and is used to provide voice and / or data connectivity to users. The terminal device can also be called user equipment (UE), subscriber unit (subscriber unit), terminal (terminal), mobile station (MS), mobile terminal (MT), etc.

[0140] Exemplarily, the terminal device in FIG6 may be a mobile phone, a tablet computer, or a computer with wireless transceiver function. The terminal device may also be a user station, a mobile station, a remote station, a remote terminal device, a mobile terminal device, a user terminal device, a wireless communication device, a user agent, a user device, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a tablet computer (PAD), a handheld device with wireless communication capabilities, a computing device, a processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in the Internet of Things, a home appliance, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in a smart grid, a wireless terminal in a smart city, a wireless terminal in a smart home, a vehicle with vehicle-to-vehicle (V2V) communication capabilities, an intelligent connected vehicle, a UAV to UAV (UAV to Unmanned aerial vehicles (UAVs, U2Us) with communication capabilities, Wi-Fi terminal devices (such as vehicle-mounted terminals, smartphones, PADs, etc. with the function of connecting to Wi-Fi access points (APs), terminal devices in future networks, or terminal devices in future evolved public land mobile networks (PLMNs), etc., are not restricted.

[0141] The network device in Figure 6 can be any device deployed in an access network that can communicate wirelessly with a terminal device. It can also be a chip or chip system that can be set in the above-mentioned device. It can also be a logical node or logical module or a function implemented in software. It can be used to implement wireless physical control functions, resource scheduling and wireless resource management, wireless access control, and mobility management functions. Specifically, the network device can be a device that supports wired access or a device that supports wireless access.

[0142] Exemplarily, the network device may be composed of one or more access network (AN) / radio access network (RAN) nodes. AN / RAN nodes may be: base stations, evolved Node Bs (gNBs), transmission reception points (TRPs), evolved Node Bs (eNBs), radio network controllers (RNCs), Node Bs (NBs), base station controllers (BSCs), base transceiver stations (BTSs), home base stations (e.g., home evolved Node Bs, or home Node Bs, HNBs), base band units (BBUs), or Wi-Fi APs, etc. The base stations may be 4G, 5G, 5.5G, or future 6G base stations, etc., without limitation; the Wi-Fi APs may be Wi-Fi 5, Wi-Fi 6, or future Wi-Fi AP products, etc., without limitation.

[0143] In another example, network equipment may include a baseband unit (BBU) and a remote radio unit (RRU). The BBU and RRU can be placed in different locations. For example, the RRU can be remotely located in a high-traffic area, while the BBU can be placed in a central computer room. The BBU and RRU can also be placed in the same computer room. The BBU and RRU can also be different components within the same rack.

[0144] In another example, the network device may also be a device including a centralized unit (CU) node, or a distributed unit (DU) node, or a CU node and a DU node. For example, the network device can be divided into CU and DU from a logical function perspective, with some protocol layer functions placed in the CU for centralized control, and the remaining part or all of the protocol layer functions distributed in the DU, which is centrally controlled by the CU. The CU and DU can be set separately, or they can be included in the same network element, such as a BBU. Furthermore, the centralized unit CU can also be divided into a control plane (CU-CP) and a user plane (CU-UP).

[0145] In another example, the network device may include a radio unit (RU), or a device including a CU, a DU, and a RU. The RU may be included in a radio frequency device or a radio frequency unit, such as an RRU, an active antenna unit (AAU), or a remote radio head (RRH).

[0146] It is understandable that in different systems, CU (or CU-CP and CU-UP), DU or RU may have different names, but those skilled in the art can understand their meanings. For example, in an open radio access network (O-RAN) system, CU may also be referred to as O-CU (open CU), DU may also be referred to as O-DU, CU-CP may also be referred to as O-CU-CP, CU-UP may also be referred to as O-CU-UP, and RU may also be referred to as O-RU. For the sake of convenience of description, this application uses CU, CU-CP, CU-UP, DU and RU as examples for description. Any of the CU (or CU-CP, CU-UP), DU and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0147] It is understandable that the terminal devices and network devices of the embodiments of the present application can be one or more chips, or a system on chip (SOC), etc. Figure 6 is only an exemplary figure, and the number of devices included is not limited. In addition, in addition to the devices shown in Figure 6, the communication system can also include other devices, such as wireless relay devices and wireless backhaul devices. The names of the various devices and the names of the various links in Figure 6 are not limited. In addition to the names shown in Figure 6, the various devices and the various links can also be named other names without limitation.

[0148] In a specific implementation, as shown in Figures 6 or 7 , each terminal device and network device may adopt the structure shown in Figure 8 , or include the components shown in Figure 8 . Figure 8 is a schematic diagram of the structure of a communication device 800 provided in an embodiment of the present application. The communication device 800 may be a terminal device or a chip or system-on-chip in a terminal device; it may also be a network device or a chip or system-on-chip in a network device. As shown in Figure 8 , the communication device 800 includes a processor 801, a transceiver 802, and a communication circuit 803.

[0149] Furthermore, the communication device 800 may further include a memory 804 . The processor 801 , the memory 804 and the transceiver 802 may be connected via a communication line 803 .

[0150] The processor 801 is a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 801 may also be other devices with processing functions, such as circuits, devices, or software modules, without limitation.

[0151] Transceiver 802 is used to communicate with other devices or other communication networks. The other communication networks may be Ethernet, radio access networks (RAN), wireless local area networks (WLAN), etc. Transceiver 802 may be a module, circuit, transceiver, or any device capable of communication.

[0152] The communication line 803 is used to transmit information between the components included in the communication device 800.

[0153] The memory 804 is used to store instructions, where the instructions may be computer programs.

[0154] The memory 804 may be a read-only memory (ROM) or other type of static storage device that can store static information and / or instructions, or a random access memory (RAM) or other type of dynamic storage device that can store information and / or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0155] It should be noted that the memory 804 can exist independently of the processor 801 or can be integrated with the processor 801. The memory 804 can be used to store instructions, program code, or some data. The memory 804 can be located within the communication device 800 or outside the communication device 800, without limitation. The processor 801 is configured to execute the instructions stored in the memory 804 to implement the methods provided in the following embodiments of the present application.

[0156] In one example, the processor 801 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 8 .

[0157] As an optional implementation, the communication device 800 includes multiple processors. For example, in addition to the processor 801 in FIG. 8 , it may also include a processor 807 .

[0158] As an optional implementation, the communication apparatus 800 further includes an output device 805 and an input device 806. For example, the input device 806 is a keyboard, a mouse, a microphone, a joystick, or the like, and the output device 805 is a display screen, a speaker, or the like.

[0159] It should be noted that the communication device 800 may be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device having a structure similar to that shown in FIG8 . Furthermore, the structure shown in FIG8 does not limit the communication device. In addition to the components shown in FIG8 , the communication device may include more or fewer components than shown, or combine certain components, or arrange the components differently.

[0160] In the embodiment of the present application, the chip system can be composed of chips, or can include chips and other discrete devices.

[0161] In addition, the actions and terms involved in the various embodiments of this application can refer to each other without limitation. The message names or parameter names in the messages exchanged between the various devices in the embodiments of this application are only examples, and other names can also be used in specific implementations without limitation.

[0162] The communication method provided in an embodiment of the present application is described below with reference to FIG9 in conjunction with the communication system shown in FIG6 or FIG7 , wherein the network device may be any network device in the communication system shown in FIG6 or FIG7 , and the terminal device may be any terminal device in the communication system shown in FIG6 or FIG7 . The network device or terminal device described in the following embodiment may include the components shown in FIG8 .

[0163] FIG9 is a flow chart of a communication method provided in an embodiment of the present application. As shown in FIG9 , the method is applied to a first RAT. The method may include:

[0164] Step 901: The network device determines first information.

[0165] Step 902: The network device sends first information to the terminal device; correspondingly, the terminal device receives the first information from the network device.

[0166] Step 903: The terminal device determines, based on the first information, time domain resources and frequency domain resources that are not used for first channel transmission.

[0167] The first information may be used to indicate time domain resources and frequency domain resources not used for first channel transmission, and the first information indicating frequency domain resources not used for first channel transmission includes indicating one or more subcarriers in one or more RBs that are not used for first channel transmission. The first channel is a physical uplink shared channel or a physical downlink shared channel.

[0168] It can be understood that the above-mentioned network device is a network device of the first RAT, the terminal device is a terminal device of the first RAT, and the first channel is the first channel of the first RAT.

[0169] Among them, the first RAT can be any communication system in the aforementioned communication systems, for example, it can be a future communication system (such as a 6G communication system), or it can be a 5G communication system, etc., without limitation.

[0170] Exemplarily, the network device may configure the time domain resources and frequency domain resources that are not used for the first channel transmission to the terminal device in the form of a rate matching pattern based on the rate matching mechanism, that is, the first information may include configuration information of one or more rate matching patterns. After the terminal device receives the first information, it can determine the time domain resources and frequency domain resources that are not used for the first channel transmission.

[0171] The time-frequency resources associated with each rate matching pattern are time domain resources and frequency domain resources not used for first channel transmission, or are described as the time-frequency resources associated with each rate matching pattern being unavailable for the first channel.

[0172] The following uses frequency domain resources as an example and refers to the following two possible designs to describe the configuration information of each rate matching pattern in detail:

[0173] In a first possible design, the configuration information of each rate matching pattern includes first indication information and second indication information.

[0174] The first indication information may be used to indicate one or more RBs associated with the rate matching pattern, and the second indication information may be used to indicate one or more subcarriers in the one or more RBs associated with the rate matching pattern.

[0175] Regarding the first indication information, in a possible implementation, the first indication information of each rate matching pattern may be a bitmap, where each bit in the bitmap is used to indicate whether the RB corresponding to each bit belongs to the rate matching pattern.

[0176] The bitmap may include Y bits, each of which may correspond to Y RBs. Y is a positive integer and may be predefined by the protocol or customized by the network device without limitation. The value of a bit may be set to 0 to indicate that the RB corresponding to the bit does not belong to the rate matching pattern, and the value of a bit may be set to 1 to indicate that the RB corresponding to the bit belongs to the rate matching pattern. Alternatively, the value of a bit may be set to 1 to indicate that the RB corresponding to the bit does not belong to the rate matching pattern, and the value of a bit may be set to 0 to indicate that the RB corresponding to the bit belongs to the rate matching pattern without limitation.

[0177] For example, taking the bit map corresponding to the first indication information as 10011011 as an example, it indicates that the first indication information is used to indicate that the 1st, 4th, 5th, 7th, and 8th RBs of the 8 RBs associated with the bit map belong to the rate matching pattern corresponding to the first indication information, and the 2nd, 3rd, and 6th RBs do not belong to the rate matching pattern corresponding to the first indication information.

[0178] It can be understood that the above-mentioned bit map is a form of expression of the first indication information, and the first indication information may also be any other form of expression that can be used to indicate one or more RBs associated with the rate matching pattern, without limitation.

[0179] Regarding the second indication information, in a first possible implementation, the second indication information of each rate matching pattern may be used to indicate a subcarrier pattern commonly associated with all RBs associated with the rate matching pattern.

[0180] The subcarrier pattern includes one or more subcarriers in an RB, and the pattern formed by the one or more subcarriers is called a subcarrier pattern. In this example, the subcarrier pattern associated with each RB in all RBs associated with the same rate matching pattern is the same. The second indication information can indicate one or more subcarriers associated with the rate matching pattern by indicating a subcarrier pattern, thereby reducing signaling overhead.

[0181] Optionally, the subcarrier pattern may be predefined.

[0182] Exemplarily, the second indication information may include A bits, and the specific value of A may be determined according to the number B of predefined subcarrier patterns. For example, In another example, the second indication information may be a bitmap, then A=B.

[0183] For example, taking the subcarrier pattern including the first subcarrier pattern, the second subcarrier pattern, the third subcarrier pattern, and the fourth subcarrier pattern as an example, the second indication information may include As shown in the second indication information (1) in Table 1 below, the second indication information can be set to 00 to indicate that the subcarrier pattern commonly associated with all RBs associated with the rate matching pattern is the first subcarrier pattern; the second indication information can be set to 01 to indicate that the subcarrier pattern commonly associated with all RBs associated with the rate matching pattern is the second subcarrier pattern; the second indication information can be set to 10 to indicate that the subcarrier pattern commonly associated with all RBs associated with the rate matching pattern is the third subcarrier pattern; the second indication information can be set to 11 to indicate that the subcarrier pattern commonly associated with all RBs associated with the rate matching pattern is the fourth subcarrier pattern:

[0184] Table 1

[0185] For another example, taking the case where the subcarrier pattern includes a first subcarrier pattern, a second subcarrier pattern, a third subcarrier pattern, and a fourth subcarrier, and the second indication information is a bitmap, the second indication information may include 4 bits, as shown in the second indication information (2) in Table 1 above, the second indication information can be set to 1000 to indicate that the subcarrier pattern commonly associated with all RBs associated with the rate matching pattern is the first subcarrier pattern; the second indication information can be set to 0100 to indicate that the subcarrier pattern commonly associated with all RBs associated with the rate matching pattern is the second subcarrier pattern; the second indication information can be set to 0010 to indicate that the subcarrier pattern commonly associated with all RBs associated with the rate matching pattern is the third subcarrier pattern; and the second indication information can be set to 0001 to indicate that the subcarrier pattern commonly associated with all RBs associated with the rate matching pattern is the fourth subcarrier pattern.

[0186] Regarding the second indication information, in a second possible implementation, the second indication information of each rate matching pattern may be used to indicate subcarrier patterns respectively associated with all RBs associated with the rate matching pattern.

[0187] The subcarrier pattern includes one or more subcarriers in an RB. In this example, the subcarrier pattern associated with each RB is indicated separately. The subcarrier patterns associated with any two RBs in all RBs associated with the same rate matching pattern can be the same or different. The second indication information can increase the flexibility of indicating subcarriers associated with the rate matching pattern and improve communication performance by indicating the subcarrier pattern associated with each RB.

[0188] Optionally, the subcarrier pattern may be predefined.

[0189] Exemplarily, the second indication information may include Y*A bits, or the second indication information may include X*A bits.

[0190] Where Y is the number of RBs corresponding to the first indication information, X is the number of RBs in the RBs corresponding to the first indication information that belong to the rate matching pattern, X is less than or equal to Y, each RB corresponds to A bits, and the A bits corresponding to each RB are used to indicate the subcarrier pattern associated with the RB corresponding to the A bits. The description of A can refer to the description of A above and is not repeated here. Compared to Y*A bits, setting the second indication information to X*A bits can reduce signaling overhead.

[0191] For example, taking the subcarrier pattern including the first subcarrier pattern, the second subcarrier pattern, the third subcarrier pattern, and the fourth subcarrier, Y is 4, and A is 2 as an example, the second indication information may include 8 bits. Assuming that the second indication information is 10010011, the second indication information can be used to indicate that the subcarrier pattern associated with the first RB is the third subcarrier, the subcarrier pattern associated with the second RB is the second subcarrier, the subcarrier pattern associated with the third RB is the first subcarrier, and the subcarrier pattern associated with the fourth RB is the fourth subcarrier.

[0192] For another example, taking the subcarrier pattern including the first subcarrier pattern, the second subcarrier pattern, the third subcarrier pattern, and the fourth subcarrier, Y is 4, X is 3, and A is 2 as an example, the second indication information may include 6 bits. Assuming that the second indication information is 100100, the second indication information can be used to indicate that the subcarrier pattern associated with the first RB belonging to the rate matching pattern in the 4 RBs corresponding to the first indication information is the third subcarrier, the subcarrier pattern associated with the second RB belonging to the rate matching pattern in the 4 RBs corresponding to the first indication information is the second subcarrier, and the subcarrier pattern associated with the third RB belonging to the rate matching pattern in the 4 RBs corresponding to the first indication information is the first subcarrier.

[0193] In a second possible design, the configuration information of each rate matching pattern includes third indication information.

[0194] The third indication information is used to indicate one or more RBs associated with the rate matching pattern and one or more subcarriers associated with the one or more RBs.

[0195] Exemplarily, the third indication information may include N*M bits, where N is the number of RBs corresponding to the third indication information, each RB corresponds to M bits, and the M bits corresponding to each RB are used to indicate whether the RB corresponding to the M bits belongs to a rate matching pattern and an RB-associated subcarrier pattern.

[0196] Optionally, N may be predefined by the protocol.

[0197] Exemplarily, for the M bits corresponding to each RB, the first value of the M bits is used to indicate that the RB corresponding to the M bits does not belong to the rate matching pattern. Alternatively, the second value of the M bits is used to indicate that the RB corresponding to the M bits belongs to the rate matching pattern, and the RB is associated with the first subcarrier pattern. Alternatively, the third value of the M bits is used to indicate that the RB corresponding to the M bits belongs to the rate matching pattern, and the RB is associated with the second subcarrier pattern. Alternatively, the fourth value of the M bits is used to indicate that the RB corresponding to the M bits belongs to the rate matching pattern, and the RB is associated with the third subcarrier pattern. Alternatively, the fifth value of the M bits is used to indicate that the RB corresponding to the M bits belongs to the rate matching pattern, and the RB is associated with the fourth subcarrier pattern.

[0198] For example, taking N as 4 and M as 3 as an example, the third indication information may include 12 bits, each 3 bits corresponding to one RB in the 4 RBs, and the value and meaning of each 3 bits may be as shown in Table 2 below. Assuming that the third indication information is 000 011 100 001, it indicates that the third indication information is used to indicate: the first RB does not belong to the rate matching pattern; the second RB belongs to the rate matching pattern, and the RB is associated with the third subcarrier pattern; the third RB belongs to the rate matching pattern, and the RB is associated with the fourth subcarrier pattern; the fourth RB belongs to the rate matching pattern, and the RB is associated with the first subcarrier pattern.

[0199] Table 2

[0200] Based on the description of the subcarrier patterns in the above two possible designs, illustratively, the subcarrier patterns may include the following subcarrier patterns:

[0201] A first subcarrier pattern, where the first subcarrier pattern includes all subcarriers in an RB;

[0202] a second subcarrier pattern, where the second subcarrier pattern includes the 1st, 3rd, 5th, 7th, 9th, and 11th subcarriers in an RB;

[0203] a third subcarrier pattern, where the third subcarrier pattern includes the 1st, 2nd, 7th, and 8th subcarriers in an RB;

[0204] The fourth subcarrier pattern includes the 1st, 2nd, 3rd, 4th, 7th, 8th, 9th, and 10th subcarriers in an RB.

[0205] The i-th subcarrier is the i-th subcarrier arranged in order of frequency from low to high or from high to low in an RB, where i=1, 2, 3, ..., 11, 12.

[0206] For the above-mentioned first subcarrier pattern, it can also be described as one or more subcarriers indicated by the first information including all subcarriers in an RB, or as a pattern formed by all subcarriers in an RB being the first subcarrier pattern. For the above-mentioned second subcarrier pattern, it can also be described as one or more subcarriers indicated by the first information including the 1st, 3rd, 5th, 7th, 9th, and 11th subcarriers in an RB, or as a pattern formed by the 1st, 3rd, 5th, 7th, 9th, and 11th subcarriers in an RB being the second subcarrier pattern. For the above-mentioned third subcarrier pattern, it can also be described as one or more subcarriers indicated by the first information including the 1st, 2nd, 7th, and 8th subcarriers in an RB, or as a pattern formed by the 1st, 2nd, 7th, and 8th subcarriers in an RB being the third subcarrier pattern. For the above-mentioned fourth subcarrier pattern, it can also be described as one or more subcarriers indicated by the first information including the 1st, 2nd, 3rd, 4th, 7th, 8th, 9th, and 10th subcarriers in an RB, or as a pattern formed by the 1st, 2nd, 3rd, 4th, 7th, 8th, 9th, and 10th subcarriers in an RB being the second subcarrier pattern.

[0207] Optionally, the subcarrier pattern corresponding to the above-mentioned frequency domain resources can be determined according to the following method: the frequency domain resources of the rate matching pattern of the first RAT can be defined in combination with the frequency domain resource design of the DMRS of the second channel of the second RAT. This ensures that when the first RAT and the second RAT share the spectrum, the first channel of the first RAT is not transmitted on the frequency domain resources of the DMRS of the second channel of the second RAT (or is described as the first channel of the first RAT performing rate matching on the frequency domain resources of the DMRS of the second channel of the second RAT, or is described as the first channel of the first RAT being silent on the frequency domain resources of the DMRS of the second channel of the second RAT), maintaining DMRS orthogonality and improving communication performance.

[0208] Among them, the second RAT can be any communication system in the aforementioned communication system except the first RAT, for example, the first RAT is a 6G communication system, and the second RAT is a 5G communication system; or, the first RAT is a 5G communication system, and the second RAT is a 6G communication system, etc., without limitation.

[0209] The second channel is a physical uplink shared channel or a physical downlink shared channel. It should be understood that the embodiments of the present application do not limit the link directions of the first channel and the second channel to the same or different. That is, the first channel can be a physical uplink shared channel, and the second channel can be a physical uplink shared channel. Alternatively, the first channel can be a physical uplink shared channel, and the second channel can be a physical downlink shared channel. Alternatively, the first channel can be a physical downlink shared channel, and the second channel can be a physical uplink shared channel. Alternatively, the first channel can be a physical downlink shared channel, and the second channel can be a physical downlink shared channel, without limitation.

[0210] For example, taking the case where the first RAT is a 6G communication system and the second RAT is a 5G communication system, the DMRS of the second channel of the 5G communication system supports multiple ports, and the multiple ports are mutually orthogonal. Depending on the supported DMRS port structure, as shown in Figure 10, there are two types of DMRS: type 1 DMRS (type 1 DMRS) and type 2 DMRS (type 2 DMRS). Each type of DMRS can be further divided into 1-symbol DMRS (1 symbol DMRS) and 2-symbol DMRS (2 symbol DMRS), resulting in a total of four DMRS structures.

[0211] Among them, the 5G communication system can use one or more DMRS ports at the same time. According to the DMRS port used, within one RB, the subcarriers occupied by DMRS have four possibilities as shown in Figure 11, that is, the subcarriers occupied by DMRS can be the subcarriers included in the first subcarrier pattern, or the second subcarrier pattern, or the third subcarrier pattern, or the fourth subcarrier pattern.

[0212] As shown in Figures 10 and 11, the first subcarrier pattern may correspond to type 1 / type 2 DMRS and be used by all code division multiplexing (CDM) groups. The second subcarrier pattern may correspond to type 1 DMRS and be used by CDM group 0. The third subcarrier pattern may correspond to type 2 DMRS and be used by CDM group 0. The fourth subcarrier pattern may correspond to type 2 DMRS and be used by CDM group 0 and CDM group 1.

[0213] The following describes the configuration information of each rate matching pattern in detail using time domain resources as an example:

[0214] The configuration information of each rate matching pattern may include tenth indication information, where the tenth indication information is used to indicate symbols associated with the rate matching pattern in one or more time slots / subframes.

[0215] Optionally, the tenth indication information may be a bitmap, where each bit in the bitmap is used to indicate whether the symbol associated with each bit belongs to the rate matching pattern. The value of the bit may be set to 0, indicating that the symbol corresponding to the bit does not belong to the rate matching pattern, and the value of the bit may be set to 1, indicating that the symbol corresponding to the bit belongs to the rate matching pattern. Alternatively, the value of the bit may be set to 1, indicating that the symbol corresponding to the bit does not belong to the rate matching pattern, and the value of the bit may be set to 0, indicating that the symbol corresponding to the bit belongs to the rate matching pattern, without restriction.

[0216] For example, taking the tenth indication information used to indicate the symbols associated with the rate matching pattern in Z time slots / subframes (Z is a positive integer) as an example, the tenth indication information may include Z*K bits, corresponding one to the Z*K symbols contained in the Z time slots / subframes, where K is the number of symbols included in each time slot / subframe.

[0217] Optionally, the configuration information of each rate matching pattern may further include fourth indication information, where the fourth indication information is used to indicate the time domain period of the rate matching pattern and the time domain resource pattern within the period.

[0218] The fourth indication information may be in a bitmap format. For a pair of frequency domain resources (such as the frequency domain resources indicated by the first indication information and the second indication information, or the frequency domain resources indicated by the third indication information) and time domain resources (such as the time domain resources indicated by the tenth indication information), the fourth indication information is used to configure a periodic time domain pattern. Each bit corresponds to a time unit, which is equal to the duration of the aforementioned time domain resource (i.e., one or more time slots / subframes indicated by the tenth indication information). When the value of a bit is '1', it indicates that the time unit corresponding to the bit appears; otherwise, the time unit does not appear. For details, please refer to the aforementioned description of the "periodicityAndPattern" parameter and will not be repeated here.

[0219] Optionally, candidate values ​​for the time domain period may include one or more of the following: 1, 2, 4, 5, 8, 10, 20, 40, 80, 160, or 320 time units. Each time unit may include one or more time slots or subframes corresponding to the rate matching pattern, that is, each time unit may include one or more time slots / subframes corresponding to the tenth indication information. For example, each time unit may include Z time slots / subframes corresponding to the tenth indication information.

[0220] Optionally, the time domain resources can be determined in the following manner: the time domain resources of the rate matching pattern of the first RAT can be defined in combination with the time domain resource design of the DMRS of the second channel of the second RAT. This ensures that when the first RAT and the second RAT perform spectrum sharing, as described in FIG12 , the first channel of the first RAT does not transmit on the time domain resources of the DMRS of the second channel of the second RAT (or is described as the first channel of the first RAT performing rate matching on the time domain resources of the DMRS of the second channel of the second RAT, or is described as the first channel of the first RAT being silent on the time domain resources of the DMRS of the second channel of the second RAT), and the second channel of the second RAT does not transmit on the time domain resources of the DMRS of the first channel of the first RAT (or is described as the second channel of the second RAT performing rate matching on the time domain resources of the DMRS of the first channel of the first RAT, or is described as the second channel of the second RAT being silent on the time domain resources of the DMRS of the first channel of the first RAT), thereby maintaining DMRS orthogonality and improving communication performance.

[0221] For example, taking the first RAT as a 6G communication system and the second RAT as a 5G communication system, the DMRS of the second channel of the 5G communication system may appear on any symbol in a time slot / subframe, so the time domain resources of the rate matching pattern can be indicated by the above-mentioned tenth indication information and fourth indication information.

[0222] Optionally, the configuration information of each rate matching pattern may further include eleventh indication information; the eleventh indication information is used to indicate the subcarrier spacing associated with the rate matching pattern.

[0223] Optionally, each rate matching pattern may be a rate matching pattern exclusive to a bandwidth part (BWP); or, each rate matching pattern may be a rate matching pattern common to a cell.

[0224] If a rate matching pattern is configured for a BWP, the rate matching pattern is effective for the associated BWP, or described as effective for the first channel on the associated BWP. If a rate matching pattern is configured for a serving cell, the rate matching pattern can be effective for all BWPs in the serving cell, or described as effective for the first channel on all BWPs in the serving cell.

[0225] Based on the above description of the first information, optionally, the network device can carry the first information in one or more of the following signaling and send it to the terminal device: radio resource control (RRC) signaling, system information block (SIB) signaling, etc., without limitation.

[0226] Optionally, the network device may further send fifth indication information to the terminal device, where the fifth indication information is used to indicate a valid rate matching pattern among one or more rate matching patterns.

[0227] Optionally, when the network device sends configuration information of the rate matching pattern to the terminal device, it can configure one or more rate matching patterns to the terminal device at the granularity of the rate matching pattern, or it can configure one or more rate matching pattern groups to the terminal device at the granularity of the rate matching pattern group, and each rate matching pattern group can contain one or more rate matching patterns.

[0228] Optionally, the network device may further send twelfth indication information to the terminal device, where the twelfth indication information is used to indicate a valid rate matching pattern group among the one or more rate matching pattern groups.

[0229] Optionally, when the network device sends the fifth indication information or the twelfth indication information to the terminal device, the fifth indication information or the twelfth indication information can be carried in one or more of the following signaling and sent to the terminal device: SIB, RRC signaling, DCI, media access control control element (MAC CE) and other signaling, without restriction.

[0230] Based on the method shown in FIG9 , when the first RAT and the second RAT share spectrum, the first channel of the first RAT and the second channel of the second RAT can be transmitted using time division multiplexing, that is, the first channel of the first RAT is silent on the time-frequency resources of the DMRS of the second channel of the second RAT, or in other words, the first channel of the first RAT does not send data on the time-frequency resources of the DMRS of the second channel of the second RAT, thereby maintaining DMRS orthogonality and improving communication performance.

[0231] Different from the above-mentioned Figure 9 in which the network device indicates the time-frequency resources not used for the transmission of the first channel of the first RAT through the first information, referring to the method shown in the following Figure 13, the network device can also indicate the time-frequency resources not used for the transmission of the first channel of the first RAT through the second information.

[0232] FIG13 is a schematic diagram of a communication method provided in an embodiment of the present application. As shown in FIG13 , the method may be applied to a first RAT, and the method may include:

[0233] Step 1301: The network device determines second information.

[0234] Step 1302: The network device sends second information to the terminal device; correspondingly, the terminal device receives the second information from the network device.

[0235] Step 1303: The terminal device determines the time-frequency resources associated with the second information based on the second information, and the time-frequency resources associated with the second information are not used for transmission of the first channel of the first RAT.

[0236] The second information may include configuration information of one or more DMRSs of a second channel of the second RAT. The first channel is a physical uplink shared channel or a physical downlink shared channel, and the second channel is a physical uplink shared channel or a physical downlink shared channel. The description of the first channel and the second channel can refer to the relevant description in Figure 9 above and is not repeated here.

[0237] Exemplarily, the configuration information of each DMRS may include at least one of the following: DMRS type, number of DMRS symbols, DMRS time domain position, DMRS time domain length, DMRS frequency domain resources, data-free DMRS code division multiplexing CDM group, phase tracking reference signal (PTRS) configuration information, etc., without limitation.

[0238] The DMRS frequency domain resources may be used to indicate RBs associated with the DMRS.

[0239] Optionally, the network device may carry the second information in one or more of the following signaling and send it to the terminal device: RRC signaling, SIB signaling, etc., without limitation.

[0240] Optionally, the network device may further send sixth indication information to the terminal device, where the sixth indication information is used to indicate effective DMRS configuration information among one or more DMRS configuration information.

[0241] Optionally, the network device may carry the sixth indication information in one or more of the following signaling and send it to the terminal device: SIB, RRC signaling, DCI, MAC CE and other signaling, without limitation.

[0242] Based on the above description of DMRS, DMRS can optionally be extended. For example, two types of DMRS can be defined in the first RAT. The first DMRS is used for transmission and demodulation of the first channel. The function of the second DMRS is different from that of the first DMRS. The time-frequency resources of the second DMRS are neither used for transmission nor demodulation of the first channel, but are only used to define time-frequency resources that are not used for transmission of the first channel of the first RAT.

[0243] Optionally, at least one DMRS configuration information among the one or more DMRS configuration information includes seventh indication information; the seventh indication information is used to indicate that the time-frequency resources associated with the DMRS are not used for first channel transmission of the first RAT. The DMRS corresponding to the seventh indication information is the second type of DMRS described above.

[0244] Exemplarily, taking the example of rate matching of the first channel of the 6G communication system on the time-frequency resources of the DMRS of the second channel of the 5G communication system, the 6G communication system can define two types of DMRS. The function of the first DMRS is similar to that of the DMRS of the second channel of the 5G communication system, and can be used for transmission and demodulation of the first channel. The function of the second DMRS is different from that of the DMRS of the second channel of the 5G communication system. The terminal device can assume that the time-frequency resources of the second DMRS are neither used for PXSCH transmission nor for demodulation of PXSCH. For the second DMRS, if the first channel is PDSCH, the terminal device may not make any assumptions about the signal transmitted on the time-frequency resources of this DMRS. If the first channel is PUSCH, the terminal device may not send this DMRS. Optionally, the structure of the second DMRS is the same as or similar to the structure of the DMRS of the second channel of the 5G communication system.

[0245] The first type of DMRS can be scalable and referred to as non-zero-power (NZP) DMRS, and the second type of DMRS can be referred to as zero-power (ZP) DMRS.

[0246] Optionally, for the second DMRS, the network device may configure one or more second DMRS configuration information for the terminal device. Furthermore, the network device may indicate the effective second DMRS configuration information among the one or more second DMRS configuration information through sixth indication information.

[0247] Based on the method shown in FIG. 13 , the network device can directly configure the configuration information of the DMRS that requires rate matching to the terminal device via the second information. The terminal device determines the time-frequency resources of the DMRS based on the DMRS configuration information, and can thus determine the time-frequency resources not used for transmission on the first channel of the first RAT. That is, when the first RAT and the second RAT share spectrum, the first channel of the first RAT and the second channel of the second RAT can be transmitted using time division multiplexing. The first channel of the first RAT is silent on the time-frequency resources of the DMRS of the second channel of the second RAT. In other words, the first channel of the first RAT does not transmit data on the time-frequency resources of the DMRS of the second channel of the second RAT, thereby preventing the data transmission on the first channel of the first RAT from interfering with the DMRS transmission on the second channel of the second RAT, maintaining the mutual orthogonality of the DMRS of the first channel of the first RAT and the DMRS of the second channel of the second RAT, and improving communication performance.

[0248] Unlike the above-mentioned Figures 9 to 13, in which the first channel of the first RAT and the second channel of the second RAT are transmitted in a time division multiplexing manner to improve the performance of the communication system, referring to the following Figure 14, the network device can also indicate the reference frequency position to the terminal device to ensure that the base sequences used by the first RAT and the second RAT are the same on the same time-frequency resources, thereby improving the performance of the communication system.

[0249] FIG14 is a schematic diagram of a communication method provided in an embodiment of the present application. The method may be applied to a first RAT. As shown in FIG14 , the method may include:

[0250] Step 1401: The network device sends eighth indication information to the terminal device; correspondingly, the terminal device receives the eighth indication information from the network device.

[0251] The eighth indication information is used to indicate a first DMRS port set, the first DMRS port set is used for a first channel of a first RAT, and the first DMRS port set includes one or more DMRS ports. The first channel is a physical uplink shared channel or a physical downlink shared channel.

[0252] Among them, the description of the first DMRS port set can refer to the detailed description of the first DMRS port set in the following two possible designs, which will not be described in detail here.

[0253] Step 1402: The network device sends ninth indication information to the terminal device; correspondingly, the terminal device receives the ninth indication information from the network device.

[0254] The ninth indication information is used to indicate a reference frequency position corresponding to the DMRS of the first channel of the first RAT, where the reference frequency position is a starting frequency position for generating the DMRS of the first channel of the first RAT.

[0255] Step 1403: The network device uses one or more DMRS ports in the first DMRS port set to send the DMRS of the first channel of the first RAT according to the eighth indication information and the ninth indication information; correspondingly, the terminal device uses one or more DMRS ports in the first DMRS port set to receive the DMRS of the first channel of the first RAT according to the eighth indication information and the ninth indication information.

[0256] The first channel is a physical downlink shared channel.

[0257] Specifically, the network device may determine the first DMRS port set based on the eighth indication information, determine the reference frequency position corresponding to the DMRS of the first channel of the first RAT based on the ninth indication information, generate the DMRS of the first channel of the first RAT based on the reference frequency position, and then use one or more DMRS ports in the first DMRS port set to send the DMRS of the first channel of the first RAT. Correspondingly, the terminal device may determine the first DMRS port set based on the eighth indication information, determine the reference frequency position corresponding to the DMRS of the first channel of the first RAT based on the ninth indication information, and based on the reference frequency position, use one or more DMRS ports in the first DMRS port set to receive the DMRS of the first channel of the first RAT.

[0258] Alternatively, the above step 1403 may be replaced by the following step 1404.

[0259] Step 1404: The terminal device uses one or more DMRS ports in the first DMRS port set to send the DMRS of the first channel of the first RAT according to the eighth indication information and the ninth indication information; correspondingly, the network device uses one or more DMRS ports in the first DMRS port set to receive the DMRS of the first channel of the first RAT according to the eighth indication information and the ninth indication information.

[0260] The first channel is a physical uplink shared channel.

[0261] Specifically, the terminal device can determine the first DMRS port set based on the eighth indication information, determine the reference frequency position corresponding to the DMRS of the first channel of the first RAT based on the ninth indication information, generate the DMRS of the first channel of the first RAT based on the reference frequency position, and then use one or more DMRS ports in the first DMRS port set to send the DMRS of the first channel of the first RAT. Correspondingly, the network device can determine the first DMRS port set based on the eighth indication information, determine the reference frequency position corresponding to the DMRS of the first channel of the first RAT based on the ninth indication information, and based on the reference frequency position, use one or more DMRS ports in the first DMRS port set to receive the DMRS of the first channel of the first RAT.

[0262] Based on the method shown in FIG. 14 , the first DMRS port set is described in detail with reference to the following two possible designs:

[0263] In a first possible design, the DMRS ports included in the first DMRS port set are the same as the DMRS ports included in the second DMRS port set, that is, the first DMRS port set of the first RAT and the second DMRS port set of the second RAT can adopt the same design.

[0264] The second DMRS port set is used for a second channel of the second RAT, and the second channel is a physical uplink shared channel or a physical downlink shared channel.

[0265] Optionally, the time domain resources associated with the DMRS ports in the first DMRS port set are the same as the time domain resources associated with the DMRS ports in the second DMRS port set.

[0266] Optionally, the second channel of the second RAT uses one or more DMRS ports in the second DMRS port set, and the one or more DMRS ports in the first DMRS port set and the one or more DMRS ports in the second DMRS port set are orthogonal to each other.

[0267] Exemplarily, one or more DMRS ports in the first DMRS port set are frequency-division multiplexed and / or code-division multiplexed with one or more DMRS ports in the second DMRS port set. Alternatively, the first RAT and the second RAT share a set of orthogonal DMRS ports, and a first channel of the first RAT and a second channel of the second RAT use different DMRS ports.

[0268] Optionally, the length of a time-domain orthogonal cover code (OCC) associated with a DMRS port in the first DMRS port set is equal to the length of a time-domain OCC associated with a DMRS port in the second DMRS port set.

[0269] Optionally, the length of the frequency-domain OCC associated with the DMRS port in the first DMRS port set is equal to the length of the frequency-domain OCC associated with the DMRS port in the second DMRS port set.

[0270] The frequency domain OCC is the OCC used in the frequency domain, the time domain OCC is the OCC used in the time domain, and the length of the OCC is the number of elements included in the OCC sequence.

[0271] For example, taking the first RAT as a 6G communication system and the second RAT as a 5G communication system as an example, the first DMRS port set of the 6G communication system and the second DMRS port set of the 5G communication system can adopt the same design.

[0272] Among them, the DMRS of the second channel of the 5G communication system can support multiple ports to support multiple spatially multiplexed layers or data streams, and different ports can maintain orthogonality through frequency division multiplexing or code division multiplexing. Depending on the parameters such as the DMRS type, the number of DMRS symbols, and the OCC, the number of ports supported by the DMRS of the second channel of the 5G communication system can be 4, 6, 8, 12, or 24. The DMRS port corresponds one-to-one to the spatially multiplexed layer or data stream. These layers or data streams can come from the same user or different users, which is called single-user multiple input multiple output (SU-MIMO) or multi-user multiple input multiple output (MU-MIMO).

[0273] Based on this, the DMRS of the first channel of the 6G communication system and the DMRS of the second channel of the 5G communication system can use the same DMRS type, number of DMRS type symbols, base sequence, OCC, etc., which is equivalent to enabling the DMRS of the first channel of the 6G communication system and the DMRS of the second channel of the 5G communication system to share a group of DMRS ports, that is, the first DMRS port set and the second DMRS port set are the same group of DMRS ports. Furthermore, when scheduling their respective first and second channels, the cells of the 6G communication system and the cells of the 5G communication system respectively use different DMRS ports in a group of DMRS ports, thereby ensuring that the DMRS of the first channel of the 6G communication system and the DMRS of the second channel of the 5G communication system are mutually orthogonal, thereby improving communication performance.

[0274] In a second possible design, the DMRS ports included in the second DMRS port set are part of the DMRS ports included in the first DMRS port set, or it is described that time domain expansion (e.g., using a longer OCC in the time domain) and / or frequency domain expansion (e.g., using a longer OCC in the frequency domain) can be performed on the basis of the second DMRS port set to determine the first DMRS port set. That is, the number of DMRS ports included in the first DMRS port set is greater than the number of DMRS ports included in the second DMRS port set.

[0275] The second DMRS port set is used for a second channel of the second RAT, and the second channel is a physical uplink shared channel or a physical downlink shared channel.

[0276] Optionally, the second channel of the second RAT uses one or more DMRS ports in the second DMRS port set, and the one or more DMRS ports in the first DMRS port set and the one or more DMRS ports in the second DMRS port set are orthogonal to each other.

[0277] Exemplarily, one or more DMRS ports in the first DMRS port set and one or more DMRS ports in the second DMRS port set are frequency-division multiplexed and / or code-division multiplexed.

[0278] The following describes the first DMRS port set using frequency domain expansion as an example:

[0279] Any DMRS port in the first DMRS port set can be associated with 2*Q RBs, where Q is a positive integer.

[0280] Optionally, the first DMRS port set may include three CDM groups, each CDM group includes one or more DMRS ports in the first DMRS port set, any DMRS port in the first CDM group is associated with the 1st, 2nd, 7th, and 8th subcarriers of each RB in 2*Q RBs, any DMRS port in the second CDM group is associated with the 3rd, 4th, 9th, and 10th subcarriers of each RB in 2*Q RBs, and any DMRS port in the third CDM group is associated with the 5th, 6th, 11th, and 12th subcarriers of each RB in 2*Q RBs.

[0281] Optionally, any DMRS port in the first DMRS port set may be associated with a frequency-domain OCC having a length of 8*Q.

[0282] The length of the frequency-domain OCC associated with the DMRS port in the first DMRS port set is greater than the length of the frequency-domain OCC associated with the DMRS port in the second DMRS port set.

[0283] Exemplarily, the length of the frequency-domain OCC associated with the DMRS port in the first DMRS port set is a positive integer multiple of 2 of the length of the frequency-domain OCC associated with the DMRS port in the second DMRS port set.

[0284] For example, taking the length of the frequency domain OCC as 8, the frequency domain OCC used by the DMRS of the first channel of the first RAT may be one or more of the eight sequences shown in Table 3 below:

[0285] Table 3

[0286] For example, as shown in FIG15 , taking the case where both the DMRS of the first channel of the first RAT and the DMRS of the second channel of the second RAT use type 2 DMRS and occupy 2 symbols, frequency domain expansion can be performed on the basis of the second DMRS port set as shown in (a) of FIG15 to obtain the first DMRS port set as shown in (b) of FIG15 .

[0287] Among them, the length of the OCC used by the DMRS of the second channel of the second RAT in the frequency domain is 4, and the corresponding DMRS ports are 24. Any DMRS port in the second DMRS port set can be associated with 1 RB. The second DMRS port set may include three CDM groups, each CDM group includes one or more DMRS ports in the second DMRS port set, any DMRS port in the first CDM group is associated with the 1st, 2nd, 7th, and 8th subcarriers of 1 RB, any DMRS port in the second CDM group is associated with the 3rd, 4th, 9th, and 10th subcarriers of 1 RB, and any DMRS port in the third CDM group is associated with the 5th, 6th, 11th, and 12th subcarriers of 1 RB.

[0288] Among them, the length of the OCC used by the DMRS of the first channel of the first RAT in the frequency domain is 8, and the corresponding DMRS ports are 48. Any DMRS port in the first DMRS port set can be associated with 2 RBs. The first DMRS port set may include three CDM groups, each CDM group includes one or more DMRS ports in the first DMRS port set, any DMRS port in the first CDM group is associated with the 1st, 2nd, 7th, and 8th subcarriers of each of the two RBs, any DMRS port in the second CDM group is associated with the 3rd, 4th, 9th, and 10th subcarriers of each of the two RBs, and any DMRS port in the third CDM group is associated with the 5th, 6th, 11th, and 12th subcarriers of each of the two RBs.

[0289] The following describes the first DMRS port set using time domain expansion as an example:

[0290] The first DMRS port set may be associated with 4*P time domain symbols, where P is a positive integer.

[0291] The time domain resources associated with the DMRS ports in the second DMRS port set may be a part of the time domain resources associated with the DMRS ports in the first DMRS port set.

[0292] Exemplarily, the length of the time-domain OCC associated with the DMRS ports in the first DMRS port set is greater than the length of the time-domain OCC associated with the DMRS ports in the second DMRS port set.

[0293] For example, the length of the time-domain OCC associated with the DMRS port in the first DMRS port set is a positive integer multiple of 2 of the length of the time-domain OCC associated with the DMRS port in the second DMRS port set.

[0294] In a first possible implementation, any DMRS port in the first DMRS port set may be associated with 2 time domain symbols among the 4*P time domain symbols.

[0295] In one possible specific implementation, the first DMRS port set may include 2*P DMRS port subsets, each DMRS port subset may include one or more DMRS ports in the first DMRS port set, and each DMRS port subset is associated with 2 time domain symbols out of 4*P time domain symbols.

[0296] Based on the above possible implementation, any DMRS port in the first DMRS port set can be associated with a time-domain OCC with a length of 2.

[0297] In a second possible implementation, any DMRS port in the first DMRS port set may be associated with all time domain symbols in 4*P time domain symbols.

[0298] Based on the second possible implementation, optionally, any DMRS port in the first DMRS port set can be associated with a time-domain OCC with a length of 4*P.

[0299] Based on the above description of the first DMRS port set and the second DMRS port set, it can be understood that, from the perspective of a terminal device, the terminal device of the first RAT can perceive the first DMRS port set but not the second DMRS port set, and the second DMRS port set is not configured for the terminal device of the first RAT. The terminal device of the second RAT can perceive the second DMRS port set but not the first DMRS port set, and the first DMRS port set is not configured for the terminal device of the second RAT. The first DMRS port set and the second DMRS port set objectively exist and satisfy the above relationship.

[0300] Based on the method shown in FIG. 14 , the ninth indication information for indicating the reference frequency position corresponding to the DMRS of the first channel of the first RAT is described below.

[0301] The reference frequency position is a starting frequency position for generating a DMRS of a first channel of the first RAT.

[0302] The reference frequency position corresponding to the DMRS of the first channel of the first RAT may be determined according to the reference frequency position corresponding to the DMRS of the second channel of the second RAT.

[0303] Specifically, the reference frequency position corresponding to the DMRS of the first channel of the first RAT is the same as the reference frequency position corresponding to the DMRS of the second channel of the second RAT.

[0304] Optionally, the base sequence corresponding to the DMRS port in the first DMRS port set is the same as the base sequence corresponding to the DMRS port in the second DMRS port set.

[0305] Exemplarily, taking the first RAT as a 6G communication system and the second RAT as a 5G communication system as an example, for the second channel based on OFDM, the base sequence used by the DMRS of the second channel is generated across all common resource blocks (CRBs) in the frequency domain, but only the part located on the RB used for the second channel transmission is transmitted. In other words, no matter which RB the second channel transmission starts, the frequency position referenced when generating the sequence used by the DMRS of the second channel is the first subcarrier of the first CRB, that is, subcarrier 0 of CRB 0 as shown in Figure 16. This ensures that in the MU-MIMO scenario, the base sequences used by multiple terminal devices on the same time-frequency resources are the same, and then the orthogonal cover code (OCC) is used to ensure that the DMRS signals of multiple co-scheduled terminal devices obtained according to the same base sequence are mutually orthogonal. If the base sequences used by the DMRS signals of these terminal devices are different, then the DMRS signals of these terminal devices are not orthogonal. The base sequence can be generated using a configurable identifier. Alternatively, if this identifier is not configured, the default value of this identifier is the physical-layer cell identify (PCI).

[0306] Based on the above description, in order to ensure that the DMRS of the first channel of the 6G communication system and the DMRS of the second channel of the 5G communication system are orthogonal to each other, that is, it is necessary to ensure that the terminal equipment of the 6G communication system and the terminal equipment of the 5G communication system that are jointly scheduled on the same time-frequency resources, the base sequences used for the DMRS of the first channel and the DMRS of the second channel remain the same. However, due to the different ranges of the 5G spectrum and the 6G spectrum, the frequency positions of subcarrier 0 of CRB 0 of the 5G cell and subcarrier 0 of CRB 0 of the 6G cell may be different, and it may not be possible to ensure that the base sequences used for the DMRS of the second channel of the 5G communication system and the DMRS of the first channel of the 6G communication system remain the same.

[0307] Based on this, the reference frequency position corresponding to the DMRS of the first channel of the first RAT may not be fixed to subcarrier 0 of CRB 0, but the network device may indicate the reference frequency position corresponding to the DMRS of the first channel of the first RAT through the ninth indication information, thereby ensuring that the reference frequency position corresponding to the DMRS of the first channel of the first RAT and the reference frequency position corresponding to the DMRS of the second channel of the second RAT are the same, ensuring that on the same time-frequency resources, the base sequence used by the DMRS of the first channel of the first RAT and the DMRS of the second channel of the second RAT remain the same, so that the DMRS of the first channel of the first RAT and the DMRS of the second channel of the second RAT can remain orthogonal to each other, thereby improving the performance of the communication system.

[0308] Exemplarily, the ninth indication information may include an absolute radio frequency channel number (ARFCN) corresponding to the reference frequency position, or the ninth indication information may include a CRB index corresponding to the reference frequency position.

[0309] For example, as shown in FIG. 17 , the reference frequency position may be subcarrier 0 of CRB X in the first RAT.

[0310] Optionally, as shown in FIG17 , for CRB 0 to CRB X-1 in the first RAT, the base sequence of the DMRS of the first channel mapped on these RBs may be the last segment of the DMRS sequence.

[0311] Optionally, different from the above-mentioned first RAT network device indicating the reference frequency position corresponding to the DMRS of the first channel of the first RAT through the ninth indication information, the first RAT network device may also send a thirteenth indication information to the terminal device of the first RAT, and the thirteenth indication information is used to indicate the base sequence generation identifier corresponding to the DMRS of the first channel of the first RAT, and the base sequence generated by the terminal device of the first RAT according to the base sequence generation identifier is the same as the base sequence generated by the terminal device of the second RAT.

[0312] The network device of the first RAT can configure a suitable base sequence generation identifier N for the terminal device of the first RAT. ID The value of ensures that the base sequence of the DMRS of the first channel of the first RAT and the base sequence of the DMRS of the second channel of the second RAT generated on the same time-frequency resources are the same.

[0313] For example, taking the DMRS of the first channel of the first RAT using the base sequence generation formula of the DMRS of the second channel of the second RAT as an example, for the PDSCH of the first RAT, its DMRS sequence r(n) can be determined according to the following formula. The network device can determine the specific value of the base sequence generation identifier based on the following formula and indicate it to the terminal device through the thirteenth indication information:

[0314] Among them, the pseudo-random sequence c(i) can be initialized according to the following formula:

[0315] in, Indicates the number of symbols contained in a time slot; Indicates the number of a time slot in a frame; l indicates the number of a symbol in a time slot; That is, the identifier of the base sequence is generated; λ represents the CDM group number; The value is 0 or 1.

[0316] Based on the method shown in FIG. 14 above, as shown in FIG. 18 , the time domain resources of the DMRS of the first channel of the first RAT and the DMRS of the second channel of the second RAT can be completely overlapped, and orthogonalization can be maintained through frequency division multiplexing and / or code division multiplexing, thereby ensuring that the DMRS of the first channel of the first RAT and the DMRS of the second channel of the second RAT can coexist through space division multiplexing, ensuring that the DMRSs are mutually orthogonal, and improving communication performance.

[0317] Based on the methods shown in Figures 9 to 14 above, when the first RAT and the second RAT perform spectrum sharing, the DMRS of the first channel of the first RAT and the DMRS of the second channel of the second RAT can be maintained orthogonal to avoid signal conflicts based on the time division multiplexing method shown in Figure 9 or Figure 13, or can be maintained orthogonal to avoid signal conflicts based on the frequency division multiplexing / code division multiplexing method shown in Figure 14. It will be understood that the above-mentioned time division multiplexing method can also be used in combination with the frequency division multiplexing / code division multiplexing method to maintain mutual orthogonality between the DMRS of the first channel of the first RAT and the DMRS of the second channel of the second RAT to avoid signal conflicts.

[0318] That is, the time domain resources of the DMRS of the first channel of the first RAT and the DMRS of the second channel of the second RAT may partially overlap. On non-overlapping time domain resources, time division multiplexing (TDM) as shown in FIG. 9 or FIG. 13 may be used to maintain mutual orthogonality between the DMRS of the first channel of the first RAT and the DMRS of the second channel of the second RAT. On overlapping time domain resources, frequency division multiplexing / code division multiplexing (CDM) as shown in FIG. 14 may be used to maintain mutual orthogonality between the DMRS of the first channel of the first RAT and the DMRS of the second channel of the second RAT. This ensures that the DMRS of the first channel of the first RAT and the DMRS of the second channel of the second RAT coexist through spatial division multiplexing, while enabling more DMRS ports for the first channel of the first RAT.

[0319] For example, as shown in FIG19 , the time domain resources of the DMRS of the first channel of the first RAT and the DMRS of the second channel of the second RAT may partially overlap. On non-overlapping time domain resources (such as symbols 4 and 5), the network device of the second RAT may send third information or fourth information to the terminal device of the second RAT to indicate time domain resources and frequency domain resources that are not used for second channel transmission. On overlapping time domain resources (such as symbols 2 and 3), the frequency division multiplexing / code division multiplexing method shown in FIG14 may be used to maintain mutual orthogonality between the DMRS of the first channel of the first RAT and the DMRS of the second channel of the second RAT.

[0320] The third information is used to indicate time domain resources and frequency domain resources that are not used for second channel transmission, the fourth information includes DMRS configuration information for the first channel of the first RAT, and the time-frequency resources associated with the fourth information are not used for second channel transmission of the second RAT. For the description of "the network device of the second RAT can send third information to the terminal device of the second RAT", reference can be made to the relevant description of "the network device of the first RAT can send first information to the terminal device of the first RAT" in FIG9 above, and for the description of "the network device of the second RAT can send fourth information to the terminal device of the second RAT", reference can be made to the relevant description of "the network device of the first RAT can send second information to the terminal device of the first RAT" in FIG13 above, which will not be repeated here.

[0321] For example, taking a 6G communication system as the first RAT and a 5G communication system as the second RAT, the maximum number of time-domain symbols for the DMRS of the second channel of the 5G communication system is 2. This, to a certain extent, limits the maximum number of supported DMRS ports, and thus the maximum number of layers or streams for spatial division multiplexing. Therefore, the maximum number of time-domain symbols for the DMRS of the first channel of the 6G communication system can be greater than 2 to support more DMRS ports. For example, it can be an integer multiple of 2, such as 4, 6, 8, etc.

[0322] The following takes the maximum number of time domain symbols of the DMRS of the first channel of the 6G communication system as 4 as an example, and refers to the following two possible designs to illustrate the DMRS of the first channel of the 6G communication system and the DMRS of the second channel of the 5G communication system:

[0323] In the first possible design, the DMRS of the first channel of the 6G communication system can use a 2-length OCC in the time domain. In addition to maintaining orthogonality through frequency division multiplexing or code division multiplexing, the DMRS ports can also maintain orthogonality through time division multiplexing. For example, as shown in Figure 20, taking the type 2 DMRS in the DMRS of the second channel similar to the 5G communication system as an example, the DMRS of the first channel of the 6G communication system can support 6 CDM groups, each CDM group is 2 symbols in the time domain and 4 subcarriers in the frequency domain. Using a 2-length OCC in the time domain and a 4-length OCC in the frequency domain, each CDM group can support 8 ports, for a total of 48 ports. The DMRS of the second channel of the 5G communication system overlaps with the first two symbols or the last two symbols of the DMRS of the first channel of the 6G communication system.

[0324] Optionally, in a first possible design, the 2-length time domain OCC used by the DMRS of the first channel of the 6G communication system may reuse the OCC used by the DMRS of the second channel of the 5G communication system. Exemplarily, as shown in Table 4 below, the 2-length OCC may be any of the following:

[0325] Table 4

[0326] In the second possible design, the DMRS of the first channel of the 6G communication system can use 4-length OCC in the time domain, and the DMRS ports are kept orthogonal through frequency division multiplexing or code division multiplexing. For example, as shown in Figure 21, taking the type 2 DMRS in the DMRS of the second channel similar to the 5G communication system as an example, the DMRS of the first channel of the 6G communication system can support 3 CDM groups, each CDM group is 4 symbols in the time domain and 4 subcarriers in the frequency domain, using 4-length OCC in the time domain and 4-length OCC in the frequency domain, then each CDM group can support 16 ports, for a total of 48 ports. The DMRS of the second channel of the 5G communication system overlaps with the first two symbols or the last two symbols of the DMRS of the first channel of the 6G communication system.

[0327] Optionally, in a second possible design, the 4-length time domain OCC used by the DMRS of the first channel of the 6G communication system may be any one of the following Table 5:

[0328] Table 5

[0329] In the first possible design, the time domain resources of the DMRS port of the first channel of a 6G communication system and the DMRS port of the second channel of a 5G communication system are aligned, resulting in higher multiplexing efficiency than the second possible design. In the second possible design, the number of time domain symbols of the DMRS port of the first channel of a 6G communication system is greater, resulting in higher demodulation performance than the first possible design. The specific communication scenario can determine which possible design to use, and there are no restrictions.

[0330] It should be noted that the various embodiments of this application can be implemented independently or in combination, without limitation. Unless otherwise specified or there is a logical conflict, the terms and / or descriptions of the different embodiments provided in this application are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0331] It is understood that in the embodiments of the present application, the execution subject may perform some or all of the steps in the embodiments of the present application. These steps or operations are merely examples, and the embodiments of the present application may also perform other operations or variations of various operations. In addition, the various steps may be performed in a different order than those presented in the embodiments of the present application, and it is possible that not all operations in the embodiments of the present application need to be performed.

[0332] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between devices. It is understandable that, in order to realize the above functions, each device includes a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example 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 the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0333] The embodiments of the present application can divide the functional modules of each device according to the above method examples. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiments of the present application is schematic and is only a logical function division. In actual implementation, there may be other division methods.

[0334] In the case of dividing each functional module according to each function, Figure 22 shows a communication device 220, which can execute the actions performed by the terminal device in the method shown in Figures 9 to 21 above, or execute the actions performed by the network device in the method shown in Figures 9 to 21 above. All relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module, and the technical effects that can be obtained can be referred to the above method embodiment, which will not be repeated here.

[0335] The communication device 220 may include a transceiver module 2201 and a processing module 2202. Exemplarily, the communication device 220 may be a communication device, or a chip used in a communication device, or other combined device or component having the aforementioned communication device functionality. When the communication device 220 is a communication device, the transceiver module 2201 may be a transceiver, which may include an antenna and radio frequency circuits, etc.; the processing module 2202 may be a processor (or processing circuit), such as a baseband processor, which may include one or more CPUs. When the communication device 220 is a component having the aforementioned communication device functionality, the transceiver module 2201 may be a radio frequency unit; the processing module 2202 may be a processor (or processing circuit), such as a baseband processor. When the communication device 220 is a system-on-chip (SoC), the transceiver module 2201 may be the input / output interface of the SoC (e.g., a baseband chip); the processing module 2202 may be the SoC's processor (or processing circuit), which may include one or more central processing units. It should be understood that the transceiver module 2201 in the embodiment of the present application can be implemented by a transceiver or a transceiver-related circuit component; the processing module 2202 can be implemented by a processor or a processor-related circuit component (or, referred to as a processing circuit).

[0336] For example, the transceiver module 2201 can be used to perform all transceiver operations performed by the communication device in the embodiments shown in Figures 9 to 21, and / or to support other processes of the technology described herein; the processing module 2202 can be used to perform all operations other than transceiver operations performed by the communication device in the embodiments shown in Figures 9 to 21, and / or to support other processes of the technology described herein.

[0337] As another possible implementation, the transceiver module 2201 in FIG22 may be replaced by a transceiver that integrates the functionality of the transceiver module 2201; and the processing module 2202 may be replaced by a processor that integrates the functionality of the processing module 2202. Furthermore, the communication device 220 shown in FIG22 may further include a memory.

[0338] Alternatively, when the processing module 2202 is replaced by a processor and the transceiver module 2201 is replaced by a transceiver, the communication device 220 involved in the embodiment of the present application can also be the communication device 230 shown in Figure 23. The processor can be the logic circuit 2301, and the transceiver can be the interface circuit 2302. Furthermore, the communication device 230 shown in Figure 23 can also include a memory 2303.

[0339] The embodiments of the present application also provide a computer program product, which, when executed by a computer, can implement the functions of any of the above method embodiments.

[0340] The embodiments of the present application also provide a computer program, which, when executed by a computer, can implement the functions of any of the above method embodiments.

[0341] The embodiment of the present application also provides a computer-readable storage medium. All or part of the processes in the above-mentioned method embodiments can be completed by a computer program to instruct the relevant hardware, and the program can be stored in the above-mentioned computer-readable storage medium. When the program is executed, it can include the processes of the above-mentioned method embodiments. The computer-readable storage medium can be an internal storage unit of the terminal (including the data sending end and / or the data receiving end) of any of the above-mentioned embodiments, such as the hard disk or memory of the terminal. The above-mentioned computer-readable storage medium can also be an external storage device of the above-mentioned terminal, such as a plug-in hard disk equipped on the above-mentioned terminal, a smart memory card (smart media card, SMC), a secure digital (secure digital, SD) card, a flash card (flash card), etc. Further, the above-mentioned computer-readable storage medium can also include both the internal storage unit of the above-mentioned terminal and an external storage device. The above-mentioned computer-readable storage medium is used to store the above-mentioned computer program and other programs and data required by the above-mentioned terminal. The above-mentioned computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.

[0342] It should be noted that the terms "first" and "second" in the specification, claims and drawings of this application are used to distinguish different objects, rather than to describe a specific order. "First" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this embodiment, unless otherwise specified, "multiple" means two or more.

[0343] Furthermore, the terms "include," "comprise," and "have," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0344] It should be understood that in this application, "at least one (item)" refers to one or more. "Multiple" refers to two or more. "At least two (items)" refers to two or three and more than three. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships can exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple. “When” and “if” both mean that corresponding measures will be taken under certain objective circumstances. They do not limit the time, nor do they require any judgment action when they are implemented, nor do they mean that there are other limitations.

[0345] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0346] In this application, "sending information to ... (a terminal device)" can be understood as the destination of the information being the terminal device. This can include sending information directly or indirectly to the terminal device. "Receiving information from ... (a terminal device)" can be understood as the source of the information being the terminal device. This can include receiving information directly or indirectly from the terminal device. The information may undergo necessary processing between the source and destination, such as formatting changes, but the destination can still understand the valid information from the source.

[0347] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0348] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0349] The units described as separate components may or may not be physically separate, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0350] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0351] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

Claims

1. A communication method, characterized in that, The method is applied to a first radio access technology (RAT), and the method includes: Receiving first information from a network device; wherein, the first information is used to indicate time-domain resources and frequency-domain resources that are not used for transmission on a first channel; the frequency-domain resources indicated by the first information as not being used for transmission on the first channel include one or more subcarriers in one or more resource blocks (RBs) indicated by the first information as not being used for transmission on the first channel; the first channel is a physical uplink shared channel or a physical downlink shared channel; Determining, according to the first information, the time-domain resources and frequency-domain resources that are not used for transmission on the first channel.

2. The method according to claim 1, wherein: The first information includes configuration information of one or more rate matching patterns; wherein, the time-frequency resources associated with the rate matching pattern are the time-domain resources and the frequency-domain resources that are not used for transmission on the first channel.

3. The method according to claim 2, wherein: The configuration information of each rate matching pattern includes first indication information and second indication information; wherein, the first indication information is used to indicate one or more RBs associated with the rate matching pattern, and the second indication information is used to indicate one or more subcarriers in one or more of the RBs associated with the rate matching pattern.

4. The method according to claim 3, wherein: The first indication information is a bit map, and each bit in the bit map is used to indicate whether the RB corresponding to each bit belongs to the rate matching pattern.

5. The method according to claim 3 or 4, wherein: For each rate matching pattern, the second indication information is used to indicate a subcarrier pattern commonly associated with all the RBs associated with the rate matching pattern, wherein the subcarrier pattern includes one or more subcarriers in one RB; or For each rate matching pattern, the second indication information is used to indicate subcarrier patterns respectively associated with all the RBs associated with the rate matching pattern, wherein the subcarrier pattern includes one or more subcarriers in one RB.

6. The method according to claim 2, wherein: The configuration information of each rate matching pattern includes third indication information; wherein, the third indication information is used to indicate one or more RBs associated with the rate matching pattern and one or more subcarriers associated in the one or more RBs.

7. The method according to claim 6, wherein: The third indication information includes N*M bits, N is the number of RBs corresponding to the third indication information, and each RB corresponds to M bits; the M bits corresponding to each RB are used to indicate whether the RB corresponding to the M bits belongs to the rate matching pattern and the subcarrier pattern associated with the RB.

8. The method according to claim 7, wherein: The first value of the M bits is used to indicate that the RB corresponding to the M bits does not belong to the rate matching pattern; Or The second value of the M bits is used to indicate that the RBs corresponding to the M bits belong to the rate matching pattern, and the RBs are associated with a first subcarrier pattern; or The third value of the M bits is used to indicate that the RBs corresponding to the M bits belong to the rate matching pattern, and the RBs are associated with a second subcarrier pattern; or The fourth value of the M bits is used to indicate that the RBs corresponding to the M bits belong to the rate matching pattern, and the RBs are associated with a third subcarrier pattern; or The fifth value of the M bits is used to indicate that the RBs corresponding to the M bits belong to the rate matching pattern, and the RBs are associated with a fourth subcarrier pattern.

9. The method according to any one of claims 5, 7 - 8, characterized in that, The subcarrier pattern is one of the following subcarrier patterns: A first subcarrier pattern, where the first subcarrier pattern includes all subcarriers in one RB; A second subcarrier pattern, where the second subcarrier pattern includes the 1st, 3rd, 5th, 7th, 9th, and 11th subcarriers in one RB; A third subcarrier pattern, where the third subcarrier pattern includes the 1st, 2nd, 7th, and 8th subcarriers in one RB; A fourth subcarrier pattern, where the fourth subcarrier pattern includes the 1st, 2nd, 3rd, 4th, 7th, 8th, 9th, and 10th subcarriers in one RB.

10. The method according to any one of claims 2-9, characterized in that, The configuration information of each rate matching pattern further includes fourth indication information; wherein, the fourth indication information is used to indicate the time domain period of the rate matching pattern and the time domain resource pattern within the period.

11. The method according to claim 10, characterized in that, The candidate values of the time domain period include one or more of the following: 1, 2, 4, 5, 8, 10, 20, 40, 80, 160, or 320 time units, and each time unit includes one or more time slots or subframes corresponding to the rate matching pattern.

12. The method according to any one of claims 2-11, characterized in that, The rate matching pattern is a rate matching pattern exclusive to a bandwidth part BWP; or The rate matching pattern is a cell common rate matching pattern.

13. The method according to any one of claims 2-12, characterized in that, The method further includes: Receiving fifth indication information from the network device; wherein, the fifth indication information is used to indicate the effective rate matching pattern among the one or more rate matching patterns.

14. The method according to any one of claims 1-13, characterized in that, The one or more subcarriers indicated by the first information include all subcarriers in one RB; or The one or more subcarriers indicated by the first information include the 1st, 3rd, 5th, 7th, 9th, and 11th subcarriers in one RB; or The one or more subcarriers indicated by the first information include the 1st, 2nd, 7th, and 8th subcarriers in one RB; or The one or more subcarriers indicated by the first information include the 1st, 2nd, 3rd, 4th, 7th, 8th, 9th, and 10th subcarriers in one RB.

15. The method according to any one of claims 1-14, characterized in that, The time domain resources and the frequency domain resources are determined according to the demodulation reference signal (DMRS) of a second channel of a second radio access technology (RAT); wherein, the second channel is a physical uplink shared channel or a physical downlink shared channel.

16. A communication method, characterized in that, The method is applied to a first radio access technology (RAT), and the method includes: Determine first information; Send the first information to a terminal device; wherein, the first information is used to indicate time domain resources and frequency domain resources not used for transmission of a first channel, and the first information indicating the frequency domain resources not used for transmission of the first channel includes that the first information indicates one or more subcarriers in one or more resource blocks (RBs) not used for transmission of the first channel; the first channel is a physical uplink shared channel or a physical downlink shared channel.

17. The method according to claim 16, wherein The first information includes configuration information of one or more rate matching patterns; wherein, the time-frequency resources associated with the rate matching pattern are the time domain resources and the frequency domain resources not used for transmission of the first channel.

18. The method according to claim 17, wherein The method further includes: Send fifth indication information to the terminal device; wherein, the fifth indication information is used to indicate the rate matching pattern that is in effect among the one or more rate matching patterns.

19. A communication method, characterized in that, The method is applied to a first radio access technology (RAT), and the method includes: Receive second information from a network device; wherein, the second information includes configuration information of one or more demodulation reference signals (DMRSs) of a second channel of a second RAT; the second channel is a physical uplink shared channel or a physical downlink shared channel; According to the second information, determine the time-frequency resources associated with the second information, and the time-frequency resources associated with the second information are not used for transmission of a first channel of a first RAT; the first channel is a physical uplink shared channel or a physical downlink shared channel.

20. The method according to claim 19, wherein The configuration information of each DMRS includes at least one of the following: DMRS type, number of DMRS symbols, DMRS time domain position, DMRS frequency domain resources, DMRS code division multiplexing (CDM) group without data.

21. The method according to claim 19 or 20, characterized in that, The method further includes: Receive sixth indication information from the network device; wherein, the sixth indication information is used to indicate the configuration information of the DMRS that is in effect among the configuration information of the one or more DMRSs.

22. The method according to any one of claims 19-21, wherein Among the configuration information of the one or more DMRSs, there is at least one piece of configuration information of a DMRS that includes seventh indication information; wherein, the seventh indication information is used to indicate that the time-frequency resources associated with the DMRS are not used for transmission of the first channel of the first RAT.

23. A communication method, characterized in that, The method is applied to a first radio access technology (RAT), and the method includes: Determine second information; Send the second information to the terminal device; wherein, the second information includes configuration information of one or more demodulation reference signals (DMRSs) of a second channel of a second radio access technology (RAT); the second channel is a physical uplink shared channel or a physical downlink shared channel; the time-frequency resources associated with the second information are not used for the transmission of a first channel of a first RAT, and the first channel is a physical uplink shared channel or a physical downlink shared channel.

24. The method according to claim 23, wherein The method further includes: Send sixth indication information to the terminal device; wherein, the sixth indication information is used to indicate the configuration information of the DMRSs that are in effect among the configuration information of the one or more DMRSs.

25. A communication method, characterized in that, The method is applied to a first radio access technology (RAT), and the method includes: Receive eighth indication information from a network device; wherein, the eighth indication information is used to indicate a first set of DMRS ports for a first demodulation reference signal (DMRS), and the first set of DMRS ports is for a first channel of the first RAT, and the first channel is a physical uplink shared channel or a physical downlink shared channel; Receive ninth indication information from the network device; wherein, the ninth indication information is used to indicate a reference frequency position corresponding to the DMRS of the first channel of the first RAT, and the reference frequency position is the starting frequency position at which the DMRS of the first channel of the first RAT is generated; According to the eighth indication information and the ninth indication information, receive the DMRS of the first channel of the first RAT using one or more DMRS ports in the first set of DMRS ports, wherein the first channel is a physical downlink shared channel; or, transmit the DMRS of the first channel of the first RAT using one or more DMRS ports in the first set of DMRS ports, wherein the first channel is a physical uplink shared channel.

26. The method according to claim 25, wherein: Any DMRS port in the first set of DMRS ports is associated with 2*Q resource blocks (RBs), where Q is a positive integer.

27. The method according to claim 26, wherein: The first set of DMRS ports includes three code division multiplexing (CDM) groups, each CDM group includes one or more DMRS ports in the first set of DMRS ports, wherein any DMRS port in the first CDM group is associated with the 1st, 2nd, 7th, and 8th subcarriers of each of the 2*Q RBs, any DMRS port in the second CDM group is associated with the 3rd, 4th, 9th, and 10th subcarriers of each of the 2*Q RBs, and any DMRS port in the third CDM group is associated with the 5th, 6th, 11th, and 12th subcarriers of each of the 2*Q RBs.

28. The method according to claim 26 or 27, wherein: Any DMRS port in the first set of DMRS ports is associated with a frequency domain orthogonal mask (OCC) of length 8*Q.

29. The method according to any one of claims 25-28, wherein: The first set of DMRS ports is associated with 4*P time domain symbols, where P is a positive integer.

30. The method according to claim 29, wherein any DMRS port in the first DMRS port set is associated with 2 time-domain symbols among the 4*P time-domain symbols.

31. The method according to claim 29 or 30, wherein the first DMRS port set includes 2*P DMRS port subsets, each of the DMRS port subsets includes one or more DMRS ports in the first DMRS port set, and each of the DMRS port subsets is respectively associated with 2 time-domain symbols among the 4*P time-domain symbols.

32. The method according to any one of claims 29-31, wherein any DMRS port in the first DMRS port set is associated with a time-domain OCC with a length of 2.

33. The method according to claim 29, wherein any DMRS port in the first DMRS port set is associated with all the time-domain symbols among the 4*P time-domain symbols.

34. The method according to claim 29 or 33, wherein any DMRS port in the first DMRS port set is associated with a time-domain OCC with a length of 4*P.

35. The method according to any one of claims 25-34, wherein the ninth indication information includes the absolute radio frequency channel number corresponding to the reference frequency position; or the ninth indication information includes the common resource block CRB index corresponding to the reference frequency position.

36. The method according to any one of claims 25-35, wherein the base sequence corresponding to the DMRS port in the first DMRS port set is the same as the base sequence corresponding to the DMRS port in the second DMRS port set, wherein the second DMRS port set is used for a second channel of a second RAT, and the second channel is a physical uplink shared channel or a physical downlink shared channel.

37. The method according to any one of claims 25-36, wherein the reference frequency position corresponding to the DMRS of the first channel of the first RAT is the same as the reference frequency position corresponding to the DMRS of the second channel of the second RAT.

38. A communication method, characterized in that, The method is applied to a first radio access technology RAT, and the method includes: sending eighth indication information to a terminal device; wherein the eighth indication information is used to indicate a first demodulation reference signal DMRS port set; the first DMRS port set is used for a first channel of the first RAT, and the first channel is a physical uplink shared channel or a physical downlink shared channel; sending ninth indication information to the terminal device; wherein the ninth indication information is used to indicate the reference frequency position corresponding to the DMRS of the first channel of the first RAT, and the reference frequency position is the starting frequency position generated by the DMRS of the first channel of the first RAT; According to the eighth indication information and the ninth indication information, receive the DMRS of the first channel of the first RAT by using one or more DMRS ports in the first DMRS port set, where the first channel is a physical uplink shared channel; or transmit the DMRS of the first channel of the first RAT by using one or more DMRS ports in the first DMRS port set, where the first channel is a physical downlink shared channel.

39. A communication device, characterized in that, The communication device includes a processor; the processor is configured to run a computer program or instruction, so that the communication method according to any one of claims 1-15 is executed, or so that the communication method according to any one of claims 16-18 is executed, or so that the communication method according to any one of claims 19-22 is executed, or so that the communication method according to any one of claims 23-24 is executed, or so that the communication method according to any one of claims 25-37 is executed, or so that the communication method according to claim 38 is executed.

40. The communication device according to claim 39, wherein The communication device further includes a memory, and the memory is configured to store the computer program or instruction.

41. A communication device, characterized in that, The communication device includes an interface circuit and a logic circuit; the interface circuit is configured to input and / or output information; the logic circuit is configured to execute the communication method according to any one of claims 1-15, or execute the communication method according to any one of claims 16-18, or execute the communication method according to any one of claims 19-22, or execute the communication method according to any one of claims 23-24, or execute the communication method according to any one of claims 25-37, or execute the communication method according to claim 38, and process and / or generate the information according to the information.

42. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions or programs, and when the computer instructions or programs run on a computer, the communication method according to any one of claims 1-15 is executed, or the communication method according to any one of claims 16-18 is executed, or the communication method according to any one of claims 19-22 is executed, or the communication method according to any one of claims 23-24 is executed, or the communication method according to any one of claims 25-37 is executed, or the communication method according to claim 38 is executed.

43. A computer program product, characterized in that, The computer program product includes computer instructions; when some or all of the computer instructions are run on a computer, it causes the communication method according to any one of claims 1-15 to be executed, or causes the communication method according to any one of claims 16-18 to be executed, or causes the communication method according to any one of claims 19-22 to be executed, or causes the communication method according to any one of claims 23-24 to be executed, or causes the communication method according to any one of claims 25-37 to be executed, or causes the communication method according to claim 38 to be executed.

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