Method and apparatus for resource configuration

Abstract

The application provides a method and device for resource configuration, the method comprising: a network device indicating a first frequency domain resource to a terminal device; the terminal device receiving a physical downlink shared channel based on the first frequency domain resource; the first frequency domain resource comprising two parts of sub-frequency domain resources, the two parts of sub-frequency domain resources respectively corresponding to different numbers of pre-demodulation reference signal (DMRS) symbols, or the two parts of sub-frequency domain resources respectively corresponding to different numbers of DMRS code division multiplexing (CDM) groups not used for carrying data. The method and device provided by the application realize flexible resource configuration in the frequency domain by configuring different numbers of pre-DMRS symbols and / or different numbers of DMRS CDM groups not used for carrying data on the scheduled frequency domain resource according to communication needs, thereby saving transmission resources.

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a method and apparatus for resource configuration. Background Art

[0002] At present, when a network device communicates with a terminal device, the demodulation reference signal (DMRS) of all scheduled resource blocks of the terminal device is configured the same, where the DMRS configuration includes the number of pre-DMRS symbols or the number of code division multiplexing (CDM) groups not used to carry data. However, in the scenario of frequency selective fading, the terminal device performs spatial division multiplexing with other terminal devices on different sub-bands (one or more resource blocks (RB)), and the number of terminal devices on different sub-bands may be different, resulting in a different number of spatial layers transmitted simultaneously on different sub-bands. If the DMRS of all scheduled resource blocks of the terminal device are configured the same, the network device will uniformly configure the number of pre-DMRS symbols and the number of DMRS CDM groups not used to carry data for all sub-bands based on the number of pre-DMRS symbols required for the sub-band with the largest number of transmission spatial layers and the number of DMRS CDM groups not used to carry data. For sub-bands with fewer transmission spatial layers, redundant DMRS or DMRS CDM groups not used to carry data will occupy data transmission resources, resulting in a waste of transmission resources and affecting communication efficiency. Summary of the Invention

[0003] The present application provides a method and apparatus for resource configuration, which realizes flexible resource configuration in the frequency domain by configuring different numbers of pre-DMRS symbols or numbers of DMRS CDM groups not used for carrying data on the scheduled frequency domain resources according to communication needs, thereby saving transmission resources.

[0004] In a first aspect, a method for resource configuration is provided, comprising: receiving first indication information from a network device, the first indication information being used to indicate a first frequency domain resource; receiving a physical downlink shared channel (PDSCH) on the first frequency domain resource based on the first indication information, wherein the first number of the PDSCH is different from the second number of the PDSCH, the first frequency domain resource includes a first sub-frequency domain resource and a second sub-frequency domain resource, the first number being the number of pre-demodulation reference signal (DMRS) symbols corresponding to the first sub-frequency domain resource, the second number being the number of pre-DMRS symbols corresponding to the second sub-frequency domain resource, or the first number being the number of DMRS code division multiplexing (CDM) groups corresponding to the first sub-frequency domain resource that are not used to carry data, and the second number being the number of DMRS CDM groups corresponding to the second sub-frequency domain resource that are not used to carry data.

[0005] The above solution implements flexible DMRS resource configuration in the frequency domain by configuring different numbers of pre-DMRS symbols on the scheduled frequency domain resources according to communication needs, thereby reducing the resource overhead of DMRS transmission and improving resource utilization.

[0006] In combination with the first aspect, in some implementations of the first aspect, the method further includes: receiving second indication information, where the second indication information is used to indicate the first sub-frequency domain resource in the first frequency domain resource.

[0007] In combination with the first aspect, in certain implementations of the first aspect, the second sub-frequency domain resources are frequency domain resources in the first frequency domain resources excluding the first sub-frequency domain resources.

[0008] In combination with the first aspect, in certain implementations of the first aspect, the method also includes: receiving second indication information, the second indication information being used to indicate frequency domain resources belonging to the first sub-frequency domain resources in other frequency domain resources except the second frequency domain resources in the first frequency domain resources, wherein the second frequency domain resources are frequency domain resources predetermined in the first frequency domain resources.

[0009] In the above scheme, in the frequency domain resources that carry the downlink signal sent by the network device to the terminal device, the second indication information only needs to indicate the resources other than the predetermined frequency domain resources. Compared with the case where there are no predetermined frequency domain resources, the resources that need to be indicated are reduced, and the size of the signaling required can also be reduced, which can reduce the signaling overhead and save resources.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the method also includes: receiving second indication information, the second indication information being used to indicate one or more resource block groups in the first frequency domain resources other than the second frequency domain resources, the one or more resource block groups belonging to the first sub-frequency domain resources, wherein the second frequency domain resources are predetermined frequency domain resources in the first frequency domain resources.

[0011] In the above scheme, in the frequency domain resources that carry the downlink signal sent by the network device to the terminal device, the second indication information only needs to indicate the resources other than the predetermined frequency domain resources. Compared with the case where there are no predetermined frequency domain resources, the resources that need to be indicated are reduced, and the size of the signaling required can also be reduced, which can reduce the signaling overhead and save resources.

[0012] In combination with the first aspect, in some implementations of the first aspect, the first indication information includes first sub-indication information and second sub-indication information, the first sub-indication information is used to indicate the first frequency domain resource, the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, the one or more resource block groups belong to the first sub-frequency domain resource, and other resource block groups in the second frequency domain resource except the one or more resource block groups belong to the second sub-frequency domain resource, or the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, the one or more resource block groups belong to the The second sub-frequency domain resources, the other resource block groups in the second frequency domain resources except the one or more resource block groups belong to the first sub-frequency domain resources, or the second sub-indication information is used to indicate the number of pre-DMRS symbols or the number of DMRSCDM groups not used to carry data corresponding to each resource block group in the second frequency domain resources, wherein the resource block group with the first number of pre-DMRS symbols or DMRSCDM groups not used to carry data in the second frequency domain resources belongs to the first sub-frequency domain resources, and the resource block group with the second number of pre-DMRS symbols or DMRS CDM groups not used to carry data in the second frequency domain resources belongs to the second sub-frequency domain resources.

[0013] In combination with the first aspect, in certain implementations of the first aspect, the first frequency domain resource belongs to the third frequency domain resource, and the third frequency domain resource satisfies at least one of the following: the number of resource blocks included in the third frequency domain resource is not M, and M belongs to a preset first number set; the number of resource blocks included in the third frequency domain resource is N, and N belongs to a preset second number set; the relationship between the number of resource blocks included in the third frequency domain resource and the number of resource blocks included in the first resource block group satisfies the first preset condition.

[0014] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: obtaining pattern information, the pattern information being used to indicate a mapping relationship between multiple patterns and multiple index values, wherein the first frequency domain resource corresponds to the multiple index values, or the pattern information being used to indicate a mapping relationship between multiple patterns and multiple index values, as well as a corresponding relationship between the first frequency domain resource and the multiple index values, each pattern being used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups that are not used to carry data; the first indication information includes a first index value, and according to the pattern corresponding to the first index value, the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups that are not used to carry data is determined.

[0015] In combination with the first aspect, in certain implementations of the first aspect, the ratio of the number of resource block groups included in the first frequency domain resources to the number of resource block groups included in the third frequency domain resources satisfies a first corresponding relationship with the number of resource blocks included in the resource block group, and the third frequency domain resources include the first frequency domain resources.

[0016] In combination with the first aspect, in certain implementations of the first aspect, the ratio of the number of resource block groups included in the first frequency domain resources to the number of resource block groups included in the third frequency domain resources satisfies a first corresponding relationship with the number of resource blocks included in the resource block group, the third frequency domain resources include the first frequency domain resources, and the number of resource blocks included in the resource block group is determined according to the first corresponding relationship.

[0017] The above scheme dynamically changes the indication granularity according to the actual scheduling resource situation while keeping the length of the indication information used for scheduling resources unchanged. That is, it dynamically determines the size of the resource block group, which can achieve indication and scheduling with a smaller granularity, saving the overhead of transmitting DMRS, while reducing the number of padding bits in the indication information, further reducing resource waste.

[0018] In combination with the first aspect, in some implementations of the first aspect, the method further includes: receiving third indication information, where the third indication information is used to indicate the first quantity or the second quantity.

[0019] In combination with the first aspect, in certain implementations of the first aspect, the number of resource block groups included in the second frequency domain resources is determined based on the number of resource block groups included in the first frequency domain resources.

[0020] In combination with the first aspect, in certain implementations of the first aspect, the number of resource block groups included in the second frequency domain resources is less than or equal to a second threshold.

[0021] In combination with the first aspect, in certain implementations of the first aspect, the first sub-frequency domain resource corresponds to at least one first DMRS port, the second sub-frequency domain resource corresponds to at least one second DMRS port, and the number of the at least one first DMRS port is equal to the number of the at least one second DMRS port; when the index of any DMRS port included in the at least one first DMRS port is greater than a third threshold or the index of any DMRS port included in the one or more second DMRS ports is greater than the third threshold, the DMRS ports included in the at least one first DMRS port are different from the DMRS ports included in the at least one second DMRS port; when the indexes of all DMRS ports included in the at least one first DMRS port and the indexes of all DMRS ports included in the at least one second DMRS port are less than or equal to the third threshold, the DMRS ports included in the at least one first DMRS port are the same as the DMRS ports included in the at least one second DMRS port; wherein the at least one first DMRS port and the at least one second DMRS port are indicated by the third indication information, or the at least one first DMRS port is indicated by the third indication information, and the at least one second DMRS port is indicated by fourth indication information, and the fourth indication information is different from the third indication information.

[0022] In the above scheme, for the frequency domain resources that carry the transmission signals between the network equipment and the terminal equipment, the network equipment configures two parts of frequency domain resources with different numbers of pre-DMRS symbols, respectively configuring DMRS ports, thereby avoiding the waste of DMRS port resources and improving the flexibility of resource scheduling.

[0023] In a second aspect, a method for signal transmission is provided, including: sending first indication information, which is used to indicate a first frequency domain resource; sending a physical downlink shared channel PDSCH on the first frequency domain resource; wherein the first number of the PDSCH is different from the second number of the PDSCH, and the first frequency domain resource includes a first sub-frequency domain resource and a second sub-frequency domain resource, the first number is the number of pre-demodulation reference signal DMRS symbols corresponding to the first sub-frequency domain resource, and the second number is the number of pre-DMRS symbols corresponding to the second sub-frequency domain resource, or the first number is the number of DMRS code division multiplexing CDM groups corresponding to the first sub-frequency domain resource that are not used to carry data, and the second number is the number of DMRS CDM groups corresponding to the second sub-frequency domain resource that are not used to carry data.

[0024] The above solution implements flexible DMRS resource configuration in the frequency domain and reduces the overhead for transmitting DMRS by configuring different numbers of pre-DMRS symbols for different resources according to communication needs for the scheduled frequency domain resources.

[0025] In combination with the second aspect, in certain implementations of the second aspect, the method further includes: sending second indication information to the terminal device, where the second information is used to indicate the first sub-frequency domain resource in the first frequency domain resource.

[0026] In combination with the second aspect, in certain implementations of the second aspect, the second sub-frequency domain resources are frequency domain resources in the first frequency domain resources excluding the first sub-frequency domain resources.

[0027] In combination with the second aspect, in certain implementations of the second aspect, the method also includes: sending second indication information to the terminal device, the second indication information being used to indicate the frequency domain resources belonging to the first sub-frequency domain resources in other frequency domain resources in the first frequency domain resources except the second frequency domain resources, wherein the second frequency domain resources are frequency domain resources predetermined in the first frequency domain resources.

[0028] In the above solution, in the frequency domain resources that carry the downlink signal sent by the network device to the terminal device, the second indication information only needs to indicate resources other than the predetermined frequency domain resources, which reduces the signaling overhead and saves resources.

[0029] In combination with the second aspect, in some implementations of the second aspect, the first indication information includes first sub-indication information and second sub-indication information, the first sub-indication information is used to indicate the first frequency domain resource, the second sub-indication information is used to indicate one or more first resource block groups in the second frequency domain resource, the one or more first resource block groups belong to the first sub-frequency domain resource, and other resource block groups in the second frequency domain resource except the one or more first resource block groups belong to the second sub-frequency domain resource, or the second sub-indication information is used to indicate one or more second resource block groups in the second frequency domain resource, the one or more second resource block groups The group belongs to the second sub-frequency domain resource, and the other resource block groups in the second frequency domain resource except the one or more second resource block groups belong to the first sub-frequency domain resource, or the second sub-indication information is used to indicate the number of pre-DMRS symbols or the number of DMRSCDM groups not used for carrying data corresponding to each resource block group in the second frequency domain resource, wherein the resource block group with the first number of pre-DMRS symbols or the second number of DMRSCDM groups not used for carrying data in the second frequency domain resource belongs to the first sub-frequency domain resource, and the resource block group with the second number of pre-DMRS symbols or the second number of DMRS CDM groups not used for carrying data in the second frequency domain resource belongs to the second sub-frequency domain resource.

[0030] In combination with the second aspect, in certain implementations of the second aspect, the first frequency domain resource belongs to the third frequency domain resource, and the third frequency domain resource satisfies at least one of the following: the number of resource blocks included in the third frequency domain resource is not M, and M belongs to a preset first number set; the number of resource blocks included in the third frequency domain resource is N, and N belongs to a preset second number set; the relationship between the number of resource blocks included in the third frequency domain resource and the number of resource blocks included in the first resource block group satisfies the first preset condition.

[0031] The above solution, by constraining the first frequency domain resources and / or the third frequency domain resources to meet certain conditions, enables the first indication information to be used to indicate predetermined frequency domain resources in the scheduled frequency domain resources, thereby further reducing signaling overhead.

[0032] In combination with the second aspect, in certain implementations of the second aspect, the method further includes: obtaining pattern information, the pattern information being used to indicate a mapping relationship between multiple patterns and multiple index values, wherein the first frequency domain resource corresponds to the multiple index values, or the pattern information being used to indicate a mapping relationship between multiple patterns and multiple index values, as well as a corresponding relationship between the first frequency domain resource and the multiple index values, each pattern being used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups that are not used to carry data; determining a first index value based on the pattern information and the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups that are not used to carry data, the first indication information including the first index value.

[0033] In combination with the second aspect, in certain implementations of the second aspect, the ratio of the number of resource block groups included in the first frequency domain resources to the number of resource block groups included in the third frequency domain resources satisfies a first corresponding relationship with the number of resource blocks included in the resource block group.

[0034] In combination with the first aspect, in certain implementations of the first aspect, the ratio of the number of resource block groups included in the first frequency domain resources to the number of resource block groups included in the third frequency domain resources satisfies a first corresponding relationship with the number of resource blocks included in the resource block group, the third frequency domain resources include the first frequency domain resources, and the number of resource blocks included in the resource block group is determined according to the first corresponding relationship.

[0035] The above scheme dynamically changes the indication granularity according to the actual scheduling resource situation while keeping the length of the indication information used for scheduling resources unchanged. That is, it dynamically determines the size of the resource block group, which can achieve indication and scheduling with a smaller granularity, saving the overhead of transmitting DMRS, while reducing the number of padding bits in the indication information, further reducing resource waste.

[0036] In combination with the second aspect, in some implementations of the second aspect, the method further includes: the network device sends third information to the terminal device, where the third information is used to indicate the first quantity or the second quantity.

[0037] In combination with the second aspect, in certain implementations of the second aspect, the number of resource block groups included in the second frequency domain resources is determined based on the number of resource block groups included in the first frequency domain resources.

[0038] In combination with the second aspect, in certain implementations of the second aspect, the number of resource block groups included in the second frequency domain resources is less than or equal to a second threshold.

[0039] In combination with the second aspect, in certain implementations of the second aspect, the first sub-frequency domain resource corresponds to at least one first DMRS port, the second sub-frequency domain resource corresponds to at least one second DMRS port, and the number of the at least one first DMRS port is equal to the number of the at least one second DMRS port; when the index of any DMRS port included in the at least one first DMRS port is greater than a third threshold or the index of any DMRS port included in the one or more second DMRS ports is greater than the third threshold, the DMRS ports included in the at least one first DMRS port are different from the DMRS ports included in the at least one second DMRS port; when the indexes of all DMRS ports included in the at least one first DMRS port and the indexes of all DMRS ports included in the at least one second DMRS port are less than or equal to the third threshold, the DMRS ports included in the at least one first DMRS port are the same as the DMRS ports included in the at least one second DMRS port; wherein the at least one first DMRS port and the at least one second DMRS port are indicated by the third indication information, or the at least one first DMRS port is indicated by the third indication information, and the at least one second DMRS port is indicated by fourth indication information, and the fourth indication information is different from the third indication information.

[0040] The above solution configures DMRS ports for two parts of frequency domain resources with different numbers of pre-DMRS symbols configured in the frequency domain resources that carry signals transmitted by network devices and terminal devices, thereby avoiding waste of DMRS port resources and improving the flexibility of resource scheduling.

[0041] In a third aspect, a communication device is provided for implementing the functions of the terminal in the method provided in the first aspect. The functions may be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions.

[0042] In combination with the third aspect, in certain implementations of the third aspect, the communication device includes: a transceiver module for receiving first indication information from a network device, the first indication information being used to indicate a first frequency domain resource; the transceiver module is also used to receive a physical downlink shared channel PDSCH on the first frequency domain resource based on the first indication information, wherein the first number of the PDSCH is different from the second number of the PDSCH, the first frequency domain resource includes a first sub-frequency domain resource and a second sub-frequency domain resource, the first number is the number of pre-demodulation reference signal DMRS symbols corresponding to the first sub-frequency domain resource, the second number is the number of pre-DMRS symbols corresponding to the second sub-frequency domain resource, or the first number is the number of DMRS code division multiplexing CDM groups corresponding to the first sub-frequency domain resource that are not used to carry data, and the second number is the number of DMRS CDM groups corresponding to the second sub-frequency domain resource that are not used to carry data.

[0043] The above solution implements flexible resource configuration in the frequency domain and reduces the overhead for transmitting DMRS by configuring different numbers of pre-DMRS symbols on the scheduled frequency domain resources according to communication needs.

[0044] In combination with the third aspect, in certain implementations of the third aspect, the transceiver module is further used to receive second indication information, where the second indication information is used to indicate the first sub-frequency domain resource in the first frequency domain resource.

[0045] In combination with the third aspect, in certain implementations of the third aspect, the second sub-frequency domain resources are frequency domain resources in the first frequency domain resources excluding the first sub-frequency domain resources.

[0046] In combination with the third aspect, in certain implementations of the third aspect, the transceiver module is also used to receive second indication information, and the second indication information is used to indicate the frequency domain resources belonging to the first sub-frequency domain resources in other frequency domain resources in the first frequency domain resources except the second frequency domain resources, wherein the second frequency domain resources are frequency domain resources predetermined in the first frequency domain resources.

[0047] In combination with the third aspect, in some implementations of the third aspect, the first indication information includes first sub-indication information and second sub-indication information, the first sub-indication information is used to indicate the first frequency domain resource, the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, the one or more resource block groups belong to the first sub-frequency domain resource, and other resource block groups in the second frequency domain resource except the one or more resource block groups belong to the second sub-frequency domain resource, or the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, the one or more resource block groups belong to the The second sub-frequency domain resources, the other resource block groups in the second frequency domain resources except the one or more resource block groups belong to the first sub-frequency domain resources, or the second sub-indication information is used to indicate the number of pre-DMRS symbols or the number of DMRSCDM groups not used to carry data corresponding to each resource block group in the second frequency domain resources, wherein the resource block group with the first number of pre-DMRS symbols or DMRSCDM groups not used to carry data in the second frequency domain resources belongs to the first sub-frequency domain resources, and the resource block group with the second number of pre-DMRS symbols or DMRS CDM groups not used to carry data in the second frequency domain resources belongs to the second sub-frequency domain resources.

[0048] In combination with the third aspect, in certain implementations of the third aspect, the first frequency domain resource belongs to the third frequency domain resource, and the third frequency domain resource satisfies at least one of the following: the number of resource blocks included in the third frequency domain resource is not M, and M belongs to a preset first number set; the number of resource blocks included in the third frequency domain resource is N, and N belongs to a preset second number set; the relationship between the number of resource blocks included in the third frequency domain resource and the number of resource blocks included in the first resource block group satisfies the first preset condition.

[0049] In combination with the third aspect, in certain implementations of the third aspect, the device also includes: a processing module, used to obtain pattern information, the pattern information is used to indicate a mapping relationship between multiple patterns and multiple index values, wherein the first frequency domain resource corresponds to the multiple index values, or the pattern information is used to indicate a mapping relationship between multiple patterns and multiple index values, as well as a corresponding relationship between the first frequency domain resource and the multiple index values, each pattern is used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups that are not used to carry data; the first indication information includes a first index value, and the processing module is also used to determine the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups that are not used to carry data based on the pattern corresponding to the first index value.

[0050] In combination with the third aspect, in certain implementations of the third aspect, the ratio of the number of resource block groups included in the first frequency domain resources to the number of resource block groups included in the third frequency domain resources satisfies a first corresponding relationship with the number of resource blocks included in the resource block group, and the third frequency domain resources include the first frequency domain resources.

[0051] In combination with the third aspect, in some implementations of the third aspect, the transceiver module is further used to receive third indication information, where the third indication information is used to indicate the first quantity or the second quantity.

[0052] In a fourth aspect, a communication device is provided, comprising: a transceiver module for sending first indication information, the first indication information being used to indicate a first frequency domain resource; the transceiver module is also used to send a physical downlink shared channel PDSCH on the first frequency domain resource; wherein the first number of the PDSCH is different from the second number of the PDSCH, the first frequency domain resource includes a first sub-frequency domain resource and a second sub-frequency domain resource, the first number is the number of pre-demodulation reference signal DMRS symbols corresponding to the first sub-frequency domain resource, the second number is the number of pre-DMRS symbols corresponding to the second sub-frequency domain resource, or the first number is the number of DMRS code division multiplexing CDM groups corresponding to the first sub-frequency domain resource that are not used to carry data, and the second number is the number of DMRS CDM groups corresponding to the second sub-frequency domain resource that are not used to carry data.

[0053] The above solution implements flexible resource configuration in the frequency domain and reduces the overhead for transmitting DMRS by configuring different numbers of pre-DMRS symbols on the scheduled frequency domain resources according to communication needs.

[0054] In combination with the fourth aspect, in certain implementations of the fourth aspect, the transceiver module is further used to send second indication information to the terminal device, where the second information is used to indicate the first sub-frequency domain resource in the first frequency domain resource.

[0055] In combination with the fourth aspect, in certain implementations of the fourth aspect, the second sub-frequency domain resources are frequency domain resources in the first frequency domain resources except the first sub-frequency domain resources.

[0056] In combination with the fourth aspect, in certain implementations of the fourth aspect, the transceiver module is also used to send second indication information to the terminal device, and the second indication information is used to indicate the frequency domain resources belonging to the first sub-frequency domain resources in other frequency domain resources in the first frequency domain resources except the second frequency domain resources, wherein the second frequency domain resources are frequency domain resources predetermined in the first frequency domain resources.

[0057] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first indication information includes first sub-indication information and second sub-indication information, the first sub-indication information is used to indicate the first frequency domain resource, the second sub-indication information is used to indicate one or more first resource block groups in the second frequency domain resource, the one or more first resource block groups belong to the first sub-frequency domain resource, and other resource block groups in the second frequency domain resource except the one or more first resource block groups belong to the second sub-frequency domain resource, or the second sub-indication information is used to indicate one or more second resource block groups in the second frequency domain resource, the one or more second resource block groups The group belongs to the second sub-frequency domain resource, and the other resource block groups in the second frequency domain resource except the one or more second resource block groups belong to the first sub-frequency domain resource, or the second sub-indication information is used to indicate the number of pre-DMRS symbols or the number of DMRSCDM groups not used for carrying data corresponding to each resource block group in the second frequency domain resource, wherein the resource block group with the first number of pre-DMRS symbols or the second number of DMRSCDM groups not used for carrying data in the second frequency domain resource belongs to the first sub-frequency domain resource, and the resource block group with the second number of pre-DMRS symbols or the second number of DMRS CDM groups not used for carrying data in the second frequency domain resource belongs to the second sub-frequency domain resource.

[0058] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first frequency domain resource belongs to the third frequency domain resource, and the third frequency domain resource satisfies at least one of the following: the number of resource blocks included in the third frequency domain resource is not M, and M belongs to a preset first number set; the number of resource blocks included in the third frequency domain resource is N, and N belongs to a preset second number set; the relationship between the number of resource blocks included in the third frequency domain resource and the number of resource blocks included in the first resource block group satisfies the first preset condition.

[0059] In combination with the fourth aspect, in certain implementations of the fourth aspect, the device also includes: a processing module, used to obtain pattern information, the pattern information is used to indicate a mapping relationship between multiple patterns and multiple index values, wherein the first frequency domain resource corresponds to the multiple index values, or the pattern information is used to indicate a mapping relationship between multiple patterns and multiple index values, and a corresponding relationship between the first frequency domain resource and the multiple index values, each pattern is used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups that are not used to carry data; the processing module is also used to determine a first index value based on the pattern information and the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups that are not used to carry data, and the first indication information includes the first index value.

[0060] In combination with the fourth aspect, in certain implementations of the fourth aspect, the ratio of the number of resource block groups included in the first frequency domain resources to the number of resource block groups included in the third frequency domain resources satisfies a first corresponding relationship with the number of resource blocks included in the resource block group.

[0061] In combination with the fourth aspect, in certain implementations of the fourth aspect, the transceiver module is further used to send third information to the terminal device, where the third information is used to indicate the first quantity or the second quantity.

[0062] In a fifth aspect, a communication device is provided, comprising: a processor and a memory; the memory is used to store a computer program; the processor is used to execute the computer program stored in the memory, so that the communication device executes the communication method of the first aspect or the second aspect.

[0063] In a sixth aspect, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is run on a computer, the computer is caused to execute the communication method of the first aspect or the second aspect.

[0064] In a seventh aspect, a chip system is provided, comprising: a processor for calling and running a computer program from a memory, so that a communication device equipped with the chip system executes the communication method of the first aspect or the second aspect.

[0065] In an eighth aspect, the present application provides a computer program product, which includes a computer program. When the computer program is run, the method performed by the terminal device in the above-mentioned first aspect is executed, or the method performed by the network device in the above-mentioned second aspect is executed. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 A schematic diagram of an example of a DMRS pattern in a 5G system is shown.

[0067] Figure 2 A schematic diagram is shown of two time slots configured with different numbers of pre-DMRS symbols.

[0068] Figure 3 A schematic diagram shows two time slots configured with different numbers of DMRS CDM groups not used for carrying data.

[0069] Figure 4 It shows the resource waste caused by configuring the same number of pre-DMRS symbols in the frequency domain.

[0070] Figure 5 It shows the resource waste caused by the number of DMRS CDM groups that are configured identically in the frequency domain and are not used to carry data.

[0071] Figure 6 A schematic interaction diagram of a resource configuration method 600 provided in the present application is shown.

[0072] Figure 7 A schematic diagram showing an example of first frequency domain resources.

[0073] Figure 8 A schematic diagram showing another example of the first frequency domain resource.

[0074] Figure 9 It is a schematic block diagram of a communication device for sending information provided in an embodiment of the present application.

[0075] Figure 10 Schematic diagram of an information sending device 20 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0076] The technical solution in this application will be described below with reference to the accompanying drawings.

[0077] As used in this specification, the terms "component," "module," "system," and the like are used to represent computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or a computer. By way of illustration, both an application running on a computing device and a computing device can be a component. One or more components can reside in a process and / or an execution thread, and a component can be located on a computer and / or distributed between two or more computers. In addition, these components can be executed from various computer-readable media having various data structures stored thereon. Components can communicate, for example, via local and / or remote processes based on signals having one or more data packets (e.g., data from two components interacting with another component on a local system, a distributed system, and / or a network, such as the Internet interacting with other systems via signals).

[0078] 1) A terminal, also known as user equipment (UE), mobile station (MS), or mobile terminal (MT), is a device that provides voice / data connectivity to users, such as a handheld device or vehicle-mounted device with wireless connection capabilities. Currently, some examples of terminals include: mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, and wireless terminals in smart homes.

[0079] 2) Network devices are devices in a wireless network, such as radio access network (RAN) nodes that connect terminals to the wireless network. Currently, some examples of RAN nodes are: gNB, transmission reception point (TRP), evolved Node B (eNB), radio network controller (RNC), Node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved Node B, or home Node B, HNB), base band unit (BBU), or wireless fidelity (Wifi) access point (AP). In a network structure, network devices may include centralized unit (CU) nodes, distributed unit (DU) nodes, or RAN devices including CU nodes and DU nodes.

[0080] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: global system of mobile communication (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), world-wide interoperability for microwave access (WiMAX) communication system, 5G system or new radio (NR), etc.

[0081] Before introducing the embodiments of the present application, several concepts related to the embodiments of the present application are briefly introduced.

[0082] Fixed wireless access (FWA) networks based on long-term evolution (LTE) and 5G NR (new radio, NR) technologies provide end users with wireless LAN or limited LAN access through indoor or outdoor customer premises equipment (CPE). CPE can provide end users with a variety of services such as the Internet, fixed-line telephone, TV, and smart home. For FWA scenarios, downlink communications from network devices to CPE are usually dominated by large data packet transmissions, and the base station needs to schedule more spectrum resources to the CPE to meet its rate requirements. In particular, for indoor FWA scenarios, due to the large number of indoor obstacles and severe multipath effects, there will be channels with strong frequency-selective fading.

[0083] In 5G new radio interface (NR) systems and long term evolution (LTE) systems, orthogonal frequency division multiplexing access (OFDMA) is typically used for multiple access. OFDMA is a method that divides transmission resources into mutually orthogonal time-frequency resource elements (REs). The signals sent by the transmitter are carried on the REs and transmitted to the receiver. Because different REs are orthogonal to each other, the receiver can receive the signal sent on each RE separately. Given the fading characteristics of the wireless channel, the signal carried on the RE will be distorted after transmission through the channel. This channel distortion is usually referred to as the channel coefficient. In order to recover the received signal, the receiving end needs to estimate the channel coefficients. The process of the receiving end obtaining channel information can also be called channel estimation. In the existing technology, a channel estimation solution based on a reference signal is usually adopted. That is, the transmitting end transmits a known signal on a specific RE, and the receiving end estimates the channel coefficients based on the received signal and the known signal, and interpolates the channel coefficients on other REs based on the estimated channel coefficients, and then receives and demodulates the data signal.

[0084] In existing wireless communication systems, the base station is equipped with multiple antennas to implement spatial multiplexing transmission using multi-input multi-output (MIMO) technology, that is, multiple data streams are transmitted on the same time-frequency resources, each data stream is transmitted on an independent spatial layer, and each spatial layer will be mapped to a different antenna port for transmission. Taking into account that the channel coefficients from different antenna ports to terminal devices are not the same, in order for the receiving end to obtain information transmitted on multiple spatial layers, it is necessary to estimate the channel coefficients between each antenna port and the terminal, so it is necessary to configure different DMRS for each antenna port. The DMRS corresponding to different antenna ports can be multiplexed using time division, frequency division, and code division. For example, Figure 1 As shown in the figure, the total number of DMRS ports is 6 and the number of CDM groups is 3. The horizontal direction represents the time domain, the vertical direction represents the frequency domain, and each small square represents an RE. DMRS ports 0 and 1 are multiplexed using orthogonal codes, so the REs corresponding to these two ports are also called a code division multiplexing (CDM) group.

[0085] 1. Subcarrier: In a communication system using orthogonal frequency division multiplexing (OFDM), frequency domain resources are divided into several sub-resources. Each sub-resource in the frequency domain is called a subcarrier. A subcarrier can also be understood as the minimum granularity of frequency domain resources. OFDM is a multi-carrier modulation technology.

[0086] 2. Subcarrier Spacing: In a communication system using OFDM technology, the spacing between the center positions or peak positions of two adjacent subcarriers in the frequency domain. For example, the subcarrier spacing in the LTE system is 15kHz, while the subcarrier spacing in the NR system in 5G can be 15kHz, 30kHz, 60kHz, or 120kHz.

[0087] 3. Resource Block (RB): N consecutive subcarriers in the frequency domain are called a resource block. For example, a resource block in the LTE system includes 12 subcarriers, and a resource block in the 5G NR system also includes 12 subcarriers. As communication systems evolve, the number of subcarriers in a resource block can also be different.

[0088] 4. Time unit: This is a concept or unit in the time domain. A time unit can be one or more subframes, one or more time slots, or one or more OFDM symbols. For example, in the 5G NR system, the corresponding time slot length is 1ms, and the time slot length corresponding to a 30kHz subcarrier spacing is 0.5ms. An OFDM symbol, also referred to as a symbol, is the smallest time unit in the OFDM system.

[0089] 5. Time-frequency resource unit: The smallest time-frequency resource granularity in the OFDM system, which is an OFDM symbol in the time domain and a subcarrier in the frequency domain.

[0090] 6. Subband: A subband includes one or more resource blocks in the frequency domain, or one or more resource block groups in the frequency domain. Since each resource block group also contains multiple resource blocks, the size of a subband can be the same as or different from the size of a resource block group. When a subband and a resource block group have the same size, the subband can also be understood as a resource block group.

[0091] 7. Antenna Port: In the 5G NR system, an antenna port is a logical port used for transmission. An antenna port includes multiple physical antennas. From the perspective of the receiver, each antenna port corresponds to an independent wireless channel.

[0092] 8. Spatial layer: In existing wireless communication systems, base stations are equipped with multiple antennas to implement spatial multiplexing transmission using MIMO technology. This means that multiple different data streams are transmitted on the same time-frequency resources. Each unrelated data stream is transmitted on an independent spatial layer, and each spatial layer is mapped to a different antenna port for transmission.

[0093] 9. Resource block group: One or more resource blocks constitute a resource block group (RBG). The size of the RBG is configured through high-level parameters in 5G NR. It should be noted that the size of the RBG mentioned in this application is understood as the number of resource blocks included in the RBG, and the size of a certain frequency domain resource mentioned in this application is also understood as the number of RBs included in the frequency domain resource. The resource block group included in a certain frequency domain resource mentioned in this application, or the resource block group or the first resource block group in the first resource block group included in a certain frequency domain resource can be understood as the unit resource block group in the frequency domain resource.

[0094] 10. Bandwidth part (BWP): Also known as bandwidth part, 5G NR can configure a portion of the frequency domain resources in the carrier for the terminal device for data transmission, without requiring the entire frequency domain resources in the carrier.

[0095] 11. Type 0 resource allocation and type 1 resource allocation

[0096] The downlink data channel supports two types of frequency domain resource allocation: type 0 and type 1. Type 0 is non-continuous frequency domain resource allocation, and type 1 is continuous frequency domain resource allocation. In order to support the flexibility of scheduling the location and quantity of frequency domain resources, the downlink control information (DCI) can dynamically indicate the frequency domain resource allocation type used for the scheduled PDSCH transmission (when the parameter resourceAllocation in the high-level signaling pdsch-config is set to dynamic). At this time, the highest bit in the frequency domain resource allocation information field in the DCI is used to indicate the frequency domain resource allocation type used for the PDSCH transmission scheduled by the current DCI. In addition, the frequency domain resource allocation used by the PDSCH can also be directly determined by the high-level signaling parameter resourceAllocation.

[0097] Specifically, type 0 indicates the resource block group allocated to PDSCH in the BWP through a bitmap or bitmap, while type 1 indicates the consecutively numbered resource blocks allocated to PDSCH in the BWP through RIV. When interleaved mapping is used, resource blocks can be understood as consecutively numbered virtual resource blocks. RIV is used to indicate the starting resource block number RB allocated to the UE PDSCH. start and the length L of the allocated contiguous resource blocks RBs In the existing 3GPP standard TS 38.214, the calculation formula for RIV is as follows:

[0098] if So

[0099] otherwise,

[0100] 12. DMRS: The Demodulation Reference Signal (DMRS) is a reference signal used to recover the received signal. DMRS is a signal known to both the transmitter and receiver. The transmitter transmits the DMRS and data to the receiver via the same port and wireless channel. The receiver obtains the channel coefficient based on the DMRS in the received signal and demodulates and decodes the received signal based on the channel coefficient to obtain the transmitted data. In the 5G NR system, considering that the channel coefficients from different antenna ports to the terminal are not the same, in order for the receiver to obtain information transmitted on multiple spatial layers, it is necessary to estimate the channel coefficients between each antenna port and the terminal. Therefore, a different DMRS needs to be configured for each antenna port. The DMRS corresponding to different antenna ports can be multiplexed using time division, frequency division, and code division.

[0101] DMRS includes pre-DMRS and additional DMRS. Pre-DMRS is usually configured in front of the physical downlink shared channel (PDSCH) in the time slot. At present, 1-symbol pre-DMRS or 2-symbol pre-DMRS can be configured in the time domain. Among them, 2-symbol pre-DMRS can support more DMRS ports to transmit more spatial layers. The 5G NR system configures the maximum number of pre-DMRS symbols through the high-level parameter maxlength. Maxlength can be 1 or 2. When maxlength is configured to 1, it means that the pre-DMRS occupies a maximum of 1 symbol. When maxLenghth is 2, it means that the pre-DMRS occupies a maximum of 2 symbols. Among them, when maxlenghth is configured to 2, the network device dynamically indicates the number of symbols occupied by the pre-DMRS in each time slot through the antenna port field in the downlink control information (DCI), that is, the network device determines the number of symbols occupied by the pre-DMRS through the "number of front-loadsymbols" indicated by the antenna port field. For example, Figure 2 Two time slots configured with different numbers of pre-DMRS symbols are shown. Figure 2 As shown, in time slot 1, due to the high number of spatial layers, DCI indicates time slot 1 and configures 2-symbol pre-DMRS. In time slot 2, due to the low number of spatial layers, DCI indicates time slot 2 and configures 1-symbol pre-DMRS.

[0102] NR supports two DMRS pilot types, DMRS Type 1 and DMRS Type 2. DMRS Type 1 has two CDM groups. When single-symbol DMRS is used, it supports up to 4 DMRS ports, with each CDM group supporting multiplexing of 2 DMRS ports through frequency-domain code division multiplexing. When dual-symbol DMRS is used, it supports up to 8 DMRS ports, with each CDM group supporting multiplexing of 4 DMRS ports through time-domain and frequency-domain code division multiplexing. DMRS Type 2 has three CDM groups. When single-symbol DMRS is used, it supports up to 6 DMRS ports, with each CDM group supporting multiplexing of 2 DMRS ports through frequency-domain code division multiplexing. When dual-symbol DMRS is used, it supports up to 12 DMRS ports, with each CDM group supporting multiplexing of 4 DMRS ports through time-domain and frequency-domain code division multiplexing.

[0103] At the same time, in the 5G NR system, CDM groups that are not used to transmit DMRS can be used to transmit data signals. Therefore, the network device will also notify the UE which DMRS ports in the CDM groups are used by other users through the "number of DMRS CDM groups not used to carry data" indicated by the "antenna port" field in the DCI. In this way, the terminal can avoid mapping the REs of its own and other UE reference signals when mapping data. When the number of DMRS CDM groups that are not used to carry data is 1, it indicates that only CDM group 0 is used to carry DMRS, and the REs corresponding to other CDM groups are used to transmit data. When the number of DMRS CDM groups that are not used to carry data is 2, it indicates that only CDM groups 0 and 1 are used to carry DMRS, and the REs corresponding to other CDM groups are used to transmit data. When the number of DMRS CDM groups that are not used to carry data is 3, it indicates that CDM groups 0, 1, and 2 are used to carry DMRS. For example, Figure 3 Two time slots with different numbers of DMRS CDM groups not used to carry data are shown. Figure 3 As shown, in time slot 1, DCI indicates that UE0 has 2 CDM groups that are not used for data transmission, namely CDM groups 0 and 1. CDM group 0 is used to transmit DMRS of UE0, while CDM group 1 is used to transmit DMRS of other users (UE1). In time slot 2, DCI indicates that UE0 has 1 CDM group that is not used for data transmission, namely CDM group 0. CDM group 0 transmits DMRS of UE0.

[0104] It should be understood that the number of DMRS code division multiplexing CDM groups that are not used to carry data can also be understood as the number of CDM groups used to carry DMRS. In the NR standard, resources that can be used for Type 1 DMRS can be divided into 2 CDM groups, and resources that can be used to carry Type 2 DMRS can be divided into 3 CDM groups. The number of DMRS CDM groups that are not used to carry data can be used to determine the CDM group used to carry DMRS and the CDM group used to carry data. For example, taking Type 2 DMRS as an example, the resources that can carry DMRS are divided into 3 CDM groups, namely CDM groups 0, 1 and 2. When the number of CDM groups that are not used to carry data is 3, only CDM groups 0, 1 and 2 are used to carry DMRS, and no CDM group is used to carry data; when the number of CDM groups that are not used to carry data is 2, only CDM groups 0 and 1 are used to carry DMRS, and CDM group 2 is used to carry data.

[0105] The following combination Figure 4 and Figure 5 , introduces the DMRS configuration currently used when network devices and terminal devices communicate.

[0106] Currently, when a network device communicates with a terminal device, the demodulation reference signal (DMRS) configuration of all scheduled resource blocks of the terminal device is the same. The DMRS configuration here includes the number of pre-DMRS symbols, the number of DMRS CDM groups not used to carry data, etc. The scheduling resource block here can be understood as the resource block allocated to the scheduled UE for data transmission. In the scenario of frequency selective fading, when sub-band pairing is adopted, the terminal device performs spatial division multiplexing with other terminal devices on different sub-bands (one or more RBs), and the number of terminal devices on different sub-bands will be different, resulting in a different number of spatial layers transmitted simultaneously on different sub-bands.

[0107] If the current DMRS configuration method is adopted, that is, the network equipment will uniformly configure the number of pre-DMRS symbols and the number of DMRS CDM groups not used for carrying data for all subbands based on the number of pre-DMRS symbols required for the subband with the largest number of transmission space layers and the number of DMRS CDM groups not used for carrying data. This will cause a waste of transmission resources for the subbands with fewer transmission space layers.

[0108] For example, Figure 4 It shows the resource waste caused by configuring the same number of pre-DMRS symbols in the frequency domain. Figure 4 As shown in the figure, there are 8 subbands in the frequency domain, numbered from subband 1 to subband 8. When subband pairing is used, that is, when the terminal device performs spatial division multiplexing in units of subbands, there are 7 UEs corresponding to the 8 subbands, numbered from UE 0 to UE 6. Assume that each UE transmits data of at most one spatial layer on each subband, as shown in the figure. Figure 4 As shown, taking subband 7 as an example, UE0 to UE6 all transmit data of one spatial layer on subband 7, and there are seven spatial layers on subband 7 (S402), while taking subband 3 as an example, UE0, UE1, and UE4 all transmit data of one spatial layer on subband 3, and there are only three spatial layers on subband 3 (S401). Figure 4 As can be seen from the figure, subband 7 has the largest number of spatial layers. Based on the number of spatial layers in subband 7, the network device configures a two-symbol pre-DMRS. Taking the configuration of type 1 DMRS as an example, assuming the number of CDM groups not used for data transmission is 3, for subband 3, configuring only a one-symbol pre-DMRS can meet the transmission requirements. Configuring a two-symbol pre-DMRS wastes transmission resources.

[0109] It should be noted that the “symbol” mentioned in this application can be understood as an OFDM symbol.

[0110] For example, Figure 5FIG shows the resource waste caused by the number of DMRS CDM groups that are not used to carry data and are configured in the same frequency domain. Figure 5 As shown in the figure, there are 8 subbands in the frequency domain, numbered from subband 1 to subband 8. When subband pairing is used, that is, when the terminal device performs spatial division multiplexing in units of subbands, there are 7 UEs corresponding to the 8 subbands, numbered from UE 0 to 6. Assume that each UE transmits data of at most one spatial layer on each subband, as shown in the figure. Figure 5 As shown, taking subband 7 as an example, UE0 to UE6 all transmit data of one spatial layer on subband 7, and there are seven spatial layers on subband 7 (S502), while taking subband 3 as an example, UE0, UE1, and UE4 all transmit data of one spatial layer on subband 3, and there are only three spatial layers on subband 3 (S501). Figure 5 As can be seen from the figure, subband 7 has the largest number of spatial layers. Based on the number of spatial layers on subband 7, the network device configures two CDM groups that are not used for data transmission. For subband 3, configuring only one CDM group that is not used for data transmission can meet the transmission requirements. Configuring two CDM groups that are not used for data transmission wastes transmission resources.

[0111] Therefore, the present application hopes to propose a resource configuration method to achieve flexible resource configuration of the number of pre-DMRS symbols and / or the number of DMRS CDM groups not used for carrying data in the frequency domain, thereby saving transmission resources.

[0112] The following combination Figures 6 to 8 , which details the resource allocation method for this application.

[0113] Figure 6 A schematic interactive diagram of a resource configuration method 600 provided by the present application is shown. The method 600 may include the following steps.

[0114] In a first possible implementation manner, S601, the network device sends first indication information to the terminal device, and accordingly, the terminal device receives the first indication information from the network device, where the first indication information is used to indicate a first frequency domain resource.

[0115] It should be understood that the first frequency domain resource here can be understood as a resource configured by the scheduled UE, or can be understood as a frequency domain resource used to carry a downlink signal sent by the network device to the terminal device. Exemplarily, the first frequency domain resource belongs to the BWP. Exemplarily, the network device indicates the first frequency domain resource to the terminal device via the "Frequency Domain Resource Allocation" field in the DCI.

[0116] S602: The network device sends a PDSCH on a first frequency domain resource, and correspondingly, the terminal device receives a PDSCH on the first frequency domain resource.

[0117] The first number of the PDSCHs is different from the second number of the PDSCHs, and the first frequency domain resources include first sub-frequency domain resources and second sub-frequency domain resources.

[0118] (1) The first number is the number of pre-demodulation reference signal (DMRS) symbols corresponding to the first sub-frequency domain resource, and the second number is the number of pre-DMRS symbols corresponding to the second sub-frequency domain resource, or

[0119] (2) the first number is the number of DMRS code division multiplexing (CDM) groups corresponding to the first sub-frequency domain resources that are not used to carry data, and the second number is the number of DMRS CDM groups corresponding to the second sub-frequency domain resources that are not used to carry data, or

[0120] (3) The first number is the number of pre-demodulation reference signal DMRS symbols corresponding to the first sub-frequency domain resources and the number of DMRS code division multiplexing CDM groups that are not used to carry data, and the second number is the number of pre-DMRS symbols corresponding to the second sub-frequency domain resources and the number of DMRS CDM groups that are not used to carry data.

[0121] It should be understood that when the first number and the second number are different, it can be understood that the number of pre-demodulation reference signal DMRS symbols corresponding to the first sub-frequency domain resources is different from the number of pre-DMRS symbols corresponding to the second sub-frequency domain resources, and the number of DMR SCDM groups corresponding to the first sub-frequency domain resources that are not used to carry data is different from the number of DMR SCDM groups corresponding to the second sub-frequency domain resources that are not used to carry data.

[0122] It should be noted that, this application uses the above (1) or (2) as an example to illustrate the method 600, but this application does not limit this. The first possible implementation of the method 600 is described using the above (1) as an example.

[0123] In the embodiment of the present application, by configuring different numbers of pre-DMRS symbols on the scheduled frequency domain resources according to communication needs, flexible resource configuration in the frequency domain is achieved, thereby reducing the overhead for transmitting DMRS.

[0124] Optionally, in S603, the network device sends second indication information to the terminal device, and accordingly, the terminal device receives the second indication information from the network device, where the second indication information is used to indicate the first sub-frequency domain resource in the first frequency domain resource.

[0125] Exemplarily, the second sub-frequency domain resource is a frequency domain resource in the first frequency domain resource excluding the first sub-frequency domain resource. The terminal device can determine the first sub-frequency domain resource and the second sub-frequency domain resource according to the first sub-frequency domain resource indicated by the second indication information.

[0126] The following takes two resource allocation methods as an example to describe in detail how the second indication information indicates the first sub-frequency domain resource.

[0127] In mode 1, the second indication information indicates the first sub-frequency domain resource in the first frequency domain resource in a bitmap manner (e.g., a resource allocation mode of type 0). Specifically, the second indication information indicates that one or more first resource block groups in the first frequency domain resource are first sub-frequency domain resources. The first resource block group here includes one or more RBs.

[0128] For example, Figure 7 Schematic diagram of the first frequency domain resource is shown. Figure 7 As shown, the first frequency domain resources include 8 RBs, RB0 to RB7, the size of a first resource block group is 2 RBs, and the first frequency domain resources include 4 first resource block groups, first resource block group 0 to first resource block group 3. The second indication information sent by the network device indicates to the terminal device that the first resource block group 1 is the first sub-frequency domain resource. Then, the terminal device determines the number and position of the first resource block groups included in the first frequency domain resources based on the number of RBs included in the first frequency domain resources and the size of the first resource block group, and then determines the position of the first sub-frequency domain resource based on the second indication information.

[0129] In the second mode, when the terminal device adopts a continuous resource allocation mode (e.g., a type 1 resource allocation mode), the second indication information indicates one or more continuous first resource block groups in the first frequency domain resources through a resource indicator value (RIV). The first resource block group here includes one or more RBs.

[0130] Exemplarily, the network device indicates a RIV, such as RIV2, through the second indication information. The terminal device determines the number and position of the first resource block group included in the first frequency domain resource according to the number of RBs included in the first frequency domain resource and the size of the first resource block group, and then determines the number and position of the first resource block group included in the first frequency domain resource according to the sequence number (RB start ) and the number of consecutively allocated first resource block groups (L RBs ), determine the location of the first sub-frequency domain resource.

[0131] It should be understood that the first resource block group can be understood as an RBG configured by higher-layer parameters in 5G NR, or as a resource block group in other forms. The following details the implementation of determining the size of the first resource block group using four possible methods as examples. Among them, possible method three is applicable to methods one and two, while possible methods one, two, and four are only applicable to method one.

[0132] Possible approach 1: the size of the first resource block group is the size of the RBG configured by the higher-level parameter (rbg-size), that is, the number of resource blocks included in the first resource block group is the number of resource blocks indicated by the higher-level parameter (rbg-size).

[0133] It should be noted that the size of the resource block group mentioned in this application can be understood as the number of resource blocks included in the resource block group.

[0134] When this method is implemented, the definition of the first resource block group continues to use the existing RBG, which makes the least change to the existing protocol compared to other possible methods.

[0135] Possible approach two: the size of the first resource block group changes dynamically with the number of RBGs included in the first frequency domain resources.

[0136] Alternatively, the size of the first resource block group may be determined according to the number of RBGs included in the first frequency domain resources. Alternatively, the size of the first resource block group may dynamically change with the number of scheduled resource block groups.

[0137] Alternatively, the ratio of the number of resource block groups included in the first frequency domain resources to the number of resource block groups included in the third frequency domain resources satisfies a first corresponding relationship with the number of resource blocks included in the resource block group, the third frequency domain resources include the first frequency domain resources, and the size of the first resource block group is determined based on the first corresponding relationship. Then, the ratio of the size of the first resource block group to the number of RBGs included in the first frequency domain resources and the number of RBGs included in the BWP satisfies the first corresponding relationship, or the size of the first resource block group is determined based on the ratio of the number of RBGs included in the first frequency domain resources and the number of RBGs included in the BWP.

[0138] Exemplarily, the third frequency domain resource is a BWP or an active bandwidth part or bandwidth.

[0139] As an example, (1) when the number of RBGs included in the first frequency domain resource is greater than the number of RBGs included in the BWP Or the ratio of the number of RBGs included in the first frequency domain resource to the number of RBGs included in the BWP is greater than When the number of RBGs included in the first frequency domain resource is less than the number of RBGs included in the BWP, the size of the first resource block group is the size of the RBG indicated by the high-level parameter rbg-size. (2) When the number of RBGs included in the first frequency domain resource is less than the number of RBGs included in the BWP, the size of the first resource block group is the size of the RBG indicated by the high-level parameter rbg-size. Or the ratio of the number of RBGs included in the first frequency domain resource to the number of RBGs included in the BWP is less than or equal to When the size of the first resource block group is the size of the RBG indicated by the high-level parameter rbg-size

[0140] As another example, in, is the size of the first resource block group, The RBG size indicated by the high-level parameter rbg-size, is the number of RBGs included in the first frequency domain resource, is the number of RBGs included in the BWP. For example, Table 1 shows an example in which the size of the first resource block group changes dynamically with the number of RBGs included in the first frequency domain resource. As can be seen from Table 1, when the number of RBGs included in the first frequency domain resource is greater than the number of RBGs included in the BWP, Or the ratio of the number of RBGs included in the first frequency domain resource to the number of RBGs included in the BWP is greater than When the size of the first resource block group is the size of the RBG indicated by the high-level parameter rbg-size; when the number of RBGs included in the first frequency domain resource is less than or equal to the number of RBGs included in the BWP And is greater than the number of RBGs included in BWP When the size of the first resource block group is RBG When the number of RBGs included in the first frequency domain resource is less than or equal to the number of RBGs included in the BWP When the size of the first resource block group is RBG

[0141] Table 1

[0142]

[0143] It should be understood that in order to determine which time-frequency resource the DCI used to indicate itself is on, the terminal device needs to perform blind inspection on all available DCI. Blind inspection of DCI of the same length only requires one configuration, while blind inspection of DCI of different lengths requires different configurations, and the number of blind inspections is also greater than when blind inspection of DCI of the same length. For example, assuming that there are two lengths of DCI that the terminal device can obtain, one is 4 bits and the other is 2 bits, then the terminal device needs to blind inspect the DCI n times using the configuration when the DCI length is 4, and also needs to blind inspect the DCI n times according to the configuration when the DCI length is 2. Assuming that the length of the DCI that the terminal device can obtain is all 4 bits, then the terminal device can only blind inspect the DCI n times using the configuration when the DCI length is 4 bits. Therefore, in order to reduce the number of times the terminal device blindly inspects DCI, the candidate values ​​for the length of DCI should be as few as possible.

[0144] In this method, in order to ensure that the candidate values ​​of the length of the DCI should be as small as possible, the length of the second indication information should be a fixed value, wherein the length of the second indication information is the length of the indication information required when scheduling all resource blocks in the BWP. When the number of actual scheduled resources, that is, the number of RBGs included in the first frequency domain resources, is less than the number of RBGs included in the BWP, the second indication information maintains a constant length of the second indication information by filling bits in the high order. In order to avoid wasting resources when there are too few scheduled resources, it is necessary to fill more bits into the second indication information. This method dynamically changes the indication granularity according to the actual scheduling resource situation, that is, dynamically determines the size of the first resource block group, while keeping the length of the indication information used for scheduling resources unchanged. This can achieve smaller granularity indication and scheduling, save the overhead of transmitting DMRS, and reduce the number of filling bits in the indication information, further reducing resource waste.

[0145] Possible implementation manner three: the size of the first resource block group is related to a coefficient.

[0146] The "one coefficient" is predefined or configured by the network device through high-layer signaling.

[0147] As an example, the size of the first resource block group is determined according to the coefficient k.

[0148] Taking type 0 resource allocation as an example, the size of the first resource block group is the size of the RBG configured according to the coefficient k and the high-level parameters. Sure.

[0149] When k is an integer greater than 1, the size of the first resource block group is greater than the size of the RBG configured by the higher layer parameters, wherein, is the size of the first resource block group, is the size of RBG.

[0150] Taking type 1 resource allocation as an example, the size of the first resource block group is determined according to the coefficient k.

[0151] The first resource block group consists of k RBs. is equal to k, where is the size of the first resource block group.

[0152] It should be understood that the coefficient k here is predefined or configured by the network device through high-layer signaling.

[0153] In this manner, when the coefficient k is greater than 1, the number of RBs included in the first resource block group increases, so that the second indication information of the same length can indicate more RBs, thereby reducing the overhead of the second indication information.

[0154] As another example, the size of the first resource block group is determined according to the length (size) of the second indication information, or it can be said that the size of the first resource block group is determined according to the number of bits occupied by the second indication information.

[0155] Take type0 resource allocation as an example. in, is the size of BWP, and M is the length of the predefined second indication information.

[0156] Take type 1 resource allocation as an example. or, in, is the size of the first resource block group, and M is the length of the predefined second indication information.

[0157] In this manner, the size of the first resource block group changes dynamically according to the BWP and the size of the second indication information, so that the second indication information can indicate more RBs without changing the length of the second indication information, thereby reducing the overhead of the second indication information.

[0158] In a fourth possible implementation, the size of the first resource block group is determined according to the number of RBGs included in the first frequency domain resource and a coefficient. The specific "coefficient" here can refer to the third possible implementation.

[0159] As an example, when the "one coefficient" is the coefficient k in the possible implementation mode 3, (1) when the number of RBGs included in the first frequency domain resource is greater than the number of RBGs included in the BWP Or the ratio of the number of RBGs included in the first frequency domain resource to the number of RBGs included in the BWP is greater than When the number of RBGs included in the first frequency domain resource is less than the number of RBGs included in the BWP, the size of the first resource block group is k times the size of the RBG indicated by the high-level parameter rbg-size. (2) When the number of RBGs included in the first frequency domain resource is less than the number of RBGs included in the BWP, the size of the first resource block group is k times the size of the RBG indicated by the high-level parameter rbg-size. Or the ratio of the number of RBGs included in the first frequency domain resource to the number of RBGs included in the BWP is less than or equal to When the size of the first resource block group is the size of the RBG indicated by the high-level parameter rbg-size times.

[0160] In this method, according to the actual scheduling resource situation, the indication granularity is dynamically changed while the length of the indication information used to schedule resources remains unchanged, that is, the size of the resource block group is dynamically determined, which can achieve indication and scheduling with smaller granularity, save the overhead of transmitting DMRS, and at the same time reduce the number of padding bits in the indication information, further reducing resource waste.

[0161] As another example, in, is the size of the first resource block group, The RBG size indicated by the high-level parameter rbg-size, is the number of RBGs included in the first frequency domain resource, is the number of RBGs included in the BWP. For example, Table 2 shows another example in which the size of the first resource block group changes dynamically with the number of RBGs included in the first frequency domain resource. As can be seen from Table 2, when the number of RBGs included in the first frequency domain resource is greater than the number of RBGs included in the BWP, Or the ratio of the number of RBGs included in the first frequency domain resource to the number of RBGs included in the BWP is greater than When the number of RBGs included in the first frequency domain resource is less than or equal to the number of RBGs included in the BWP, the size of the first resource block group is k times the size of the RBG indicated by the high-level parameter rbg-size; when the number of RBGs included in the first frequency domain resource is less than or equal to the number of RBGs included in the BWP And is greater than the number of RBGs included in BWP When the size of the first resource block group is RBG times; when the number of RBGs included in the first frequency domain resource is less than or equal to the number of RBGs included in the BWP When the size of the first resource block group is RBG times.

[0162] Table 2

[0163]

[0164] In this method, according to the actual scheduling resource situation, the indication granularity is dynamically changed while the length of the indication information used to schedule resources remains unchanged, that is, the size of the resource block group is dynamically determined, which can achieve indication and scheduling with smaller granularity, save the overhead of transmitting DMRS, and at the same time reduce the number of padding bits in the indication information, further reducing resource waste.

[0165] As another example, when the "one coefficient" is the length M of the second indication information in the possible implementation mode 3, (1) when the number of RBGs included in the first frequency domain resource is greater than the number of RBGs included in the BWP, Or the ratio of the number of RBGs included in the first frequency domain resource to the number of RBGs included in the BWP is greater than When the size of the first resource block group is (2) When the number of RBGs included in the first frequency domain resource is less than the number of RBGs included in the BWP Or the ratio of the number of RBGs included in the first frequency domain resource to the number of RBGs included in the BWP is less than or equal to When the size of the first resource block group is

[0166] In this method, according to the actual scheduling resource situation, the indication granularity is dynamically changed while the length of the indication information used to schedule resources remains unchanged, that is, the size of the resource block group is dynamically determined, which can achieve indication and scheduling with smaller granularity, save the overhead of transmitting DMRS, and at the same time reduce the number of padding bits in the indication information, further reducing resource waste.

[0167] As another example, in, is the size of the first resource block group, is the size of BWP, is the number of RBGs included in the first frequency domain resource, is the number of RBGs included in the BWP, and M is the length of the predefined second indication information.

[0168] In this method, according to the actual scheduling resource situation, the indication granularity is dynamically changed while the length of the indication information used to schedule resources remains unchanged, that is, the size of the resource block group is dynamically determined, which can achieve indication and scheduling with smaller granularity, save the overhead of transmitting DMRS, and at the same time reduce the number of padding bits in the indication information, further reducing resource waste.

[0169] Optionally, S604, the network device sends third indication information to the terminal device, and accordingly, the terminal device receives the third indication information from the network device, where the third indication information is used to indicate the first quantity or the second quantity.

[0170] It should be understood that since the number of pre-DMRS symbols on the scheduled frequency domain resources is 1 or 2, and the first number is different from the second number, when the third indication information can be used to indicate the first number, the terminal device can determine the second number. For example, when the first number is 1, the second number is 2, and vice versa.

[0171] Optionally, method 600 also includes: the first sub-frequency domain resource corresponds to at least one first DMRS port, the second sub-frequency domain resource corresponds to at least one second DMRS port, and the number of the at least one first DMRS port is equal to the number of the at least one second DMRS port; when the index of any DMRS port included in the at least one first DMRS port is greater than a third threshold or the index of any DMRS port included in the one or more second DMRS ports is greater than the third threshold, the DMRS ports included in the at least one first DMRS port are different from the DMRS ports included in the at least one second DMRS port; when the indexes of all DMRS ports included in the at least one first DMRS port and the indexes of all DMRS ports included in the at least one second DMRS port are less than or equal to the third threshold, the DMRS ports included in the at least one first DMRS port are the same as the DMRS ports included in the at least one second DMRS port; wherein the at least one first DMRS port and the at least one second DMRS port are indicated by the third indication information, or the at least one first DMRS port is indicated by the third indication information, and the at least one second DMRS port is indicated by fourth indication information, and the fourth indication information is different from the third indication information.

[0172] The following describes the above solution in detail using two possible methods as examples.

[0173] Possible approach 1: The third indication information is used to indicate the number of pre-DMRS symbols, the number of DMRS CDM groups not used for carrying data, at least one first DMRS port, and at least one second DMRS port. For example, the number of pre-DMRS symbols, the number of DMRS CDM groups not used for carrying data, and the at least one first DMRS port indicated by the third indication information may be a first antenna port configuration indicated by the antenna port field in 3GPP standard TS 38.212.

[0174] It should be understood that the at least one first DMRS port or the at least one second DMRS port here can be understood as the DMRS port used when the frequency domain resources corresponding to the first quantity or the second quantity indicated by the third indication information are used for DMRS transmission. For example, if the third indication information is used to indicate the first quantity, then the first sub-frequency domain resource uses at least one first DMRS port for DMRS transmission, and then the second sub-frequency domain resource uses at least one second DMRS port for DMRS transmission. Or, for example, if the third indication information is used to indicate the second quantity, then the second sub-frequency domain resource uses at least one first DMRS port for DMRS transmission, and then the first sub-frequency domain resource uses at least one second DMRS port for DMRS transmission.

[0175] As an example, Table 3 shows an example of a possible mapping relationship between the first antenna port configuration and the second DMRS port. The first column in Table 3 is the index value, the second column is the number of DMRS CDM groups that are not used to carry data, the third column is the port index value of the first DMRS port, the fourth column is the number of preamble DMRS symbols, and the fifth column is the port index value of the second DMRS port. It can be seen from Table 3 that each index value corresponds to a first antenna port configuration and a second DMRS port. The third indication information may include an index value in Table 3, that is, any value in the first column of Table 3, and the terminal device determines the first antenna port configuration and at least one second DMRS port based on the one index value.

[0176] It should be understood that the number of pre-DMRS symbols in the frequency domain resource configuration corresponding to the first DMRS port and the second DMRS port is different. Table 3 takes the case where the number of pre-DMRS symbols corresponding to the first DMRS port is 2 as an example, and the number of pre-DMRS symbols corresponding to the second DMRS port is 1. When the number of DMRS CDM groups not used for carrying data is 2 and the number of pre-DMRS symbols is 2, the corresponding port index value of the first DMRS port has 8 candidate values, such as 0 to 7 in the third column of Table 3; when the number of DMRS CDM groups not used for carrying data is 2 and the number of pre-DMRS symbols is 1, the corresponding port index value of the second DMRS port has 4 candidate values, such as 0 to 3 in the fifth column of Table 3.

[0177] It should be noted that the port index value of the first DMRS port may be the same as or different from the port index value of the second DMRS port.

[0178] Specifically, when the index of any DMRS port included in the at least one first DMRS port is greater than the third threshold or the index of any DMRS port included in the one or more second DMRS ports is greater than the third threshold, the DMRS port included in the at least one first DMRS port is different from the DMRS port included in the at least one second DMRS port. The fact that any DMRS port included in the at least one first DMRS port is different from the DMRS port included in the at least one second DMRS port can be understood as any port index value of the first DMRS port in Table 3 is different from any port index value of the second DMRS port. The third threshold here can be that when the number of symbols of the preamble DMRS is 1, the third indication information indicates the maximum port index value of the DMRS port corresponding to the number of DMRS CDM groups that are not used to carry data. For example, when the number of pre-DMRS symbols is 1, as shown in Table 3, the number of DMRS CDM groups not used to carry data indicated by the third indication information is 2, the corresponding maximum index of the DMRS port is 3, and there are 4 rows with index values ​​16 to 19. The port index value corresponding to the first DMRS port is greater than 3, and any port index value of the first DMRS port in these 4 rows is different from any port index value of the second DMRS port.

[0179] Specifically, when the indexes of all DMRS ports included in the at least one first DMRS port and the indexes of all DMRS ports included in the at least one second DMRS port are less than or equal to a third threshold, the DMRS ports included in the at least one first DMRS port are the same as the DMRS ports included in the at least one second DMRS port. The fact that any DMRS port included in the at least one first DMRS port is the same as the DMRS port included in the at least one second DMRS port can be understood as any port index value of the first DMRS port in Table 3 being the same as any port index value of the second DMRS port. The third threshold here can be that when the number of symbols of the preamble DMRS is 1, the third indication information indicates the maximum port index value of the DMRS port corresponding to the number of DMRS CDM groups that are not used to carry data. For example, when the number of pre-DMRS symbols is 1, as shown in Table 3, the number of DMRS CDM groups not used to carry data indicated by the third indication information is 2, the corresponding maximum index of the DMRS port is 3, and there are 4 rows with index values ​​12 to 15. The port index value corresponding to the first DMRS port is less than or equal to 3, and any port index value of the first DMRS port in these 4 rows is the same as any port index value of the second DMRS port.

[0180] Table 3

[0181]

[0182] Possible method two, the third indication information here is used to indicate the number of pre-DMRS symbols, the number of DMRS CDM groups not used to carry data, and at least one first DMRS port. For example, the number of pre-DMRS symbols, the number of DMRS CDM groups not used to carry data, and at least one first DMRS port indicated by the third indication information can be the first antenna port configuration indicated by the antenna port field in the 3GPP standard TS 38.212. The network device can also send fourth indication information to the terminal device, and the fourth indication information is used to indicate at least one second DMRS port.

[0183] It should be understood that the first DMRS port here can be understood as the DMRS port used when the frequency domain resources corresponding to the first quantity or the second quantity indicated by the third indication information are used for DMRS transmission. For example, when the third indication information is used to indicate the first quantity, the first sub-frequency domain resource uses at least one first DMRS port for DMRS transmission, and at this time, the second sub-frequency domain resource uses at least one second DMRS port for DMRS transmission. When the third indication information is used to indicate the second quantity, the second sub-frequency domain resource uses at least one first DMRS port for DMRS transmission, and at this time, the first sub-frequency domain resource uses at least one second DMRS port for DMRS transmission.

[0184] As an example, Table 4 shows an example of a possible mapping relationship between the first antenna port configuration and the first DMRS port. The first column in Table 4 is the index value, the second column is the number of DMRS CDM groups that are not used to carry data, the third column is the port index value of the first DMRS port, and the fourth column is the number of pre-DMRS symbols. It can be seen from Table 4 that each index value corresponds to a first antenna port configuration. The third indication information may include an index value in Table 4, that is, any value in the first column of Table 3, and the terminal device determines the first antenna port configuration based on the one index value. The fourth indication information is used to indicate the port index value of a second DMRS port corresponding to the above-mentioned first antenna port configuration.

[0185] Table 4

[0186]

[0187]

[0188] It should be understood that in this solution, the first frequency domain resources include two parts of frequency domain resources with different numbers of configured pre-DMRS symbols. If the first antenna port configuration indicated by the antenna port field in the existing 3GPP standard TS 38.212 is used, these two parts of frequency domain resources can only use one DMRS port, so the port index values ​​of the DMRS ports corresponding to the two parts of frequency domain resources must be consistent. When the number of DMRS CDM groups not used to carry data is the same, the range of index values ​​of the DMRS ports that can be selected for the frequency domain resources with the number of pre-DMRS symbols of 1 and 2 is not the same. In order to make the two parts of frequency domain resources select the same DMRS port, it is inevitable that a part of the DMRS ports corresponding to the frequency domain resources with the number of pre-DMRS symbols configured of 2 cannot be utilized, resulting in a waste of resources.

[0189] It should be noted that the first indication information, the second indication information and the third indication information in the present application solution can be sent by the network device to the terminal device through one DCI, or can be sent to the terminal device through different DCIs. Figure 6 The numbering of each indication information is only for the convenience of description and does not limit the order of the steps. In a specific implementation, the above indication information can be sent by the network device to the terminal device together, or can be sent by the network device to the terminal device one by one.

[0190] In an embodiment of the present application, DMRS ports are configured separately for two parts of frequency domain resources with different numbers of pre-DMRS symbols configured in the frequency domain resources that carry signals transmitted by network devices and terminal devices, thereby avoiding waste of DMRS port resources and improving the flexibility of resource scheduling.

[0191] In a second possible implementation manner, S601, the network device sends first indication information to the terminal device, and accordingly, the terminal device receives the first indication information from the network device, where the first indication information is used to indicate a first frequency domain resource.

[0192] It should be understood that the first frequency domain resource here can be understood as a resource configured by the scheduled UE, or can be understood as a frequency domain resource used to carry a downlink signal sent by the network device to the terminal device. Exemplarily, the first frequency domain resource is part of the BWP. Exemplarily, the network device indicates the first frequency domain resource to the terminal device via the "Frequency Domain Resource Allocation" field in the DCI.

[0193] It should be understood that the first indication information includes first sub-indication information and second sub-indication information. Among them, the first sub-indication information is used to indicate the first frequency domain resource. The first sub-indication information adopts the resource indication method of continuous resource allocation, indicating the first frequency domain resource through RIV. Any RIV corresponds to a set of parameters for determining the continuously allocated frequency domain resources, including the sequence number RB of the starting resource block of the first frequency domain resource. start and the number of consecutively allocated resource blocks L RBs . The second sub-indication information is mainly used to indicate the configuration of the resource block group in the second frequency domain resources. The following will be divided into three possible situations for detailed introduction. Exemplarily, the first indication information is the "frequency domain resource allocation" field in the DCI. The existing "frequency domain resource allocation" field can be used to indicate the first frequency domain resources. In the second possible implementation method, the "frequency domain resource allocation" field is reused to indicate the configuration of the resource block group in the second frequency domain resources.

[0194] Before introducing the three possible situations of the second sub-indication information, Figure 8 The differences and connections between the first frequency domain resources, the second frequency domain resources, the first sub-frequency domain resources, and the second sub-frequency domain resources are introduced in detail.

[0195] The first frequency domain resources include first sub-frequency domain resources and second sub-frequency domain resources, and the second frequency domain resources are frequency domain resources predetermined in the first frequency domain resources.

[0196] For example, Figure 8 FIG. 1 shows an example of a first frequency domain resource. Figure 8 As shown, the first frequency domain resource ( Figure 8 All boxes in ) include the first sub-frequency domain resource ( Figure 8 blank box in the middle) and the second sub-frequency domain resource ( Figure 8 S801 is the second frequency domain resource, and the first frequency domain resource includes the second frequency domain resource. Figure 8 As shown in (a) of FIG, the second frequency domain resources may include one or more resource block groups belonging to the first sub-frequency domain resources (S802), and also include one or more resource block groups belonging to the second sub-frequency domain resources (S803). Or, as Figure 8 As shown in (b) of FIG, the one or more resource block groups (S803) included in the second frequency domain resources all belong to the second sub-frequency domain resources. Or, as Figure 8 As shown in (c), the one or more resource block groups (S802) included in the second frequency domain resources all belong to the first sub-frequency domain resources.

[0197] It should be understood that “the second frequency domain resource is a frequency domain resource predetermined in the first frequency domain resource” can be understood as follows: assuming that the first frequency domain resource includes N first resource block groups, the second frequency domain resource includes i first resource block groups, i and N are positive integers, and N ≥ i, once the terminal device determines the size of i, it can determine the second frequency domain resource in the first frequency domain resource. For example, the i first resource block groups included in the second frequency domain resource can be the first resource block groups with indexes of 0, 1, .., i-1 in the first frequency domain resource, such as Figure 8 As shown in (a) in FIG, S801 is a first resource block group with an index of 0 to 5 in the first frequency domain resource. Alternatively, the i first resource block groups included in the second frequency domain resource can be a first resource block group with an index of Ni, ... N-1 in the first frequency domain resource, such as Figure 8 As shown in (d), S801 is the first resource block group with indexes from 15 to 20 in the first frequency domain resources.

[0198] Possible scenario one: the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resources, and the one or more resource block groups belong to the first sub-frequency domain resources, and other resource block groups in the second frequency domain resources except the one or more resource block groups belong to the second sub-frequency domain resources.

[0199] Possible scenario two: the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resources, and the one or more resource block groups belong to the second sub-frequency domain resources, and other resource block groups in the second frequency domain resources except the one or more resource block groups belong to the first sub-frequency domain resources.

[0200] Possible scenario three, the second sub-indication information is used to indicate the number of pre-DMRS symbols or the number of DMRS CDM groups not used to carry data corresponding to each resource block group in the second frequency domain resource, wherein the resource block group whose number of pre-DMRS symbols or the number of DMRS CDM groups not used to carry data in the second frequency domain resource is a first number belongs to the first sub-frequency domain resource, and the resource block group whose number of pre-DMRS symbols or the number of DMRS CDM groups not used to carry data in the second frequency domain resource is a second number belongs to the second sub-frequency domain resource.

[0201] It should be understood that to implement the above solution, the third frequency domain resources and / or the first frequency domain resources need to meet any one of the following conditions: Wherein, the third frequency domain resources include the first frequency domain resources.

[0202] Condition 1: The number of resource blocks included in the third frequency domain resource is not M, and M belongs to a preset first number set. In other words, the network device or terminal device does not expect the number of resource blocks included in the third frequency domain resource to belong to the first number set.

[0203] For example, the first number set may include one or more values ​​from {1, 2, 3, 4, 5, 6, 7, 9, 10, 14, 15, 22, 31, 44, 63, 88, 89, 90, 126, 127, 175, 176, 177, 178, 179, 180, 252, 253, 254, 255}. Alternatively, it may be other sets, which are not limited in this application.

[0204] Condition two: the number of resource blocks included in the third frequency domain resources is N, and N belongs to a preset second number set; or, the network device or terminal device expects that the number of resource blocks included in the third frequency domain resources belongs to the second number set.

[0205] For example, the first number set may include one or more values ​​from {32, 33, 45, 46, 64, 65, 91, 92, 128, 129, 130, 131, 140, 141, 181, 182, 256, 257}, or other sets, which are not limited in this application.

[0206] Condition three: the relationship between the number of resource blocks included in the third frequency domain resources and the number of resource blocks included in the first resource block group meets a first preset condition.

[0207] The following takes the third frequency domain resource as BWP as an example to explain condition three in detail.

[0208] Exemplarily, the size of the BWP and the size of the first resource block group satisfy in, is the size of BWP, is the size of the first resource block group.

[0209] It should be understood that when any one of the above three conditions is met, the second sub-indication information may indicate a maximum of n first resource block groups in the first frequency domain resource (corresponding to the above possible situation one or possible situation two) or may indicate the number of pre-DMRS symbols of a maximum of n first resource block groups in the first frequency domain resource (corresponding to the above possible situation three). In other words, the number of resource block groups included in the second frequency domain resource is less than or equal to the second threshold. The second threshold here is n. The definition of n here can be understood as the maximum number of first resource block groups in the first frequency domain resource that can be indicated by the second sub-indication information, and n is a positive integer. In addition, the value of n can also be determined in a variety of ways. The following takes three ways of determining the value of n as an example to introduce possible methods for determining the value of n.

[0210] Method 1: The terminal device determines n based on the high-level signaling sent by the network device. Or,

[0211] Method 2: The terminal device determines n based on each BWP predefined in the standard. Or,

[0212] Mode 3: The terminal device determines n according to the size of the BWP and the size of the first resource block group.

[0213] The following takes method 3 as an example to describe in detail the method for determining the value of n.

[0214] Exemplarily, when n is determined according to the size of the BWP and the size of the first resource block group, n satisfies the following formula:

[0215]

[0216] in, is the size of the first resource block group, is the size of the BWP.

[0217] It can be seen that when different BWPs and different first resource block group sizes are configured, the value of n may be different.

[0218] In the present application, the maximum number of first resource block groups included in the second frequency domain resources is recorded as n, and the number of first resource block groups included in the second frequency domain resources is recorded as i.

[0219] It should be understood that in the embodiments of the present application, after any of the above conditions 1 to 3 are met and the value of n is determined, in a specific implementation, it is possible that the second sub-indication information indicates 0 first resource block groups, or i = 0, which is the same as the first possible implementation. To avoid the situation of i = 0, that is, to ensure that i > 0, the size of the first frequency domain resource indicated by the first sub-indication information also needs to meet the second preset condition.

[0220] Exemplarily, the second preset condition is in, is the size of the first resource block group, is the size of the BWP.

[0221] The number i of first resource block groups included in the second frequency domain resources can be determined by the following formula:

[0222] in, is the number of first resource block groups included in the first frequency domain resources, is the number of first resource block groups included in the BWP.

[0223] It can be seen from the above that the difference between n and i is equal to the difference between the number of first resource block groups included in the BWP and the number of first resource block groups included in the first frequency domain resources.

[0224] The following will use two possible examples to provide detailed explanations on how the network device indicates the first frequency domain resource and the second frequency domain resource in the first frequency domain resource through the first indication information, and how the terminal device determines the first frequency domain resource and the second frequency domain resource in the first frequency domain resource based on the first indication information when the size of the first frequency domain resource meets the second preset condition.

[0225] The first possible example is: (1) the terminal device determines the first sub-indication information based on the first indication information, where the first sub-indication information is used to indicate the frequency domain pattern of the first frequency domain resource corresponding to the RIV, and determines the first frequency domain resource based on the first sub-indication information.

[0226] The first indication information adopts the resource indication mode of continuous resource allocation and indicates the first frequency domain resource through RIV. The first sub-indication information, that is, the frequency domain pattern corresponding to the RIV indicated by the first indication information, includes the sequence number RB of the starting resource block of the first frequency domain resource. start A candidate value and the number of consecutively allocated resource blocks L RBs A candidate value for .

[0227] It should be understood that each RIV corresponds to a frequency domain pattern, wherein each frequency domain pattern includes the sequence number RB of the starting resource block of the first frequency domain resource. start A candidate value and the number of consecutively allocated resource blocks L RBs The number of consecutive allocated resource blocks included in the frequency domain pattern is L RBs The candidate value is greater than In the case of , the frequency domain pattern may correspond to at least two RIVs, and any two of the at least two RIVs are not equal, wherein, is the size of the first resource block group, is the size of the BWP.

[0228] Among them, the at least two RIVs corresponding to each frequency domain pattern include a first RIV that is smaller than a second preset threshold, and the RIVs other than the first RIV in the at least two RIVs are all larger than the second preset threshold. The second preset threshold is in, is the size of the BWP.

[0229] Exemplarily, when n is 2, the RIV corresponding to the frequency domain pattern is determined as follows:

[0230] 1) If The frequency domain pattern corresponds to one RIV, which is calculated as shown in TS38.214;

[0231] 2) If The frequency domain pattern corresponds to at least two RIVs, which are calculated as follows:

[0232] if The frequency domain pattern corresponds to two RIVs, namely RIV0 and RIV1. The calculation method of RIV0 is as described in TS 38.214; the calculation method of RIV1 is as follows: If otherwise,

[0233] if The frequency domain pattern corresponds to 4 RIVs, namely RIV2, RIV3, RIV4 and RIV5. The calculation method of RIV2 is as described in 38.214. The calculation methods of RIV2, RIV3 and RIV4 are as follows: If otherwise,

[0234] in,

[0235] For example, one candidate value of each frequency domain pattern of the first frequency domain resource corresponds to 2 i RIV.

[0236] For example, as shown in Table 5, the candidate values ​​of the frequency domain pattern are and The number i of the first resource block groups included in the second frequency domain resource in the first frequency domain resource corresponding to the candidate value is 1, corresponding to RIV 0 and RIV1, and the candidate value of the frequency domain pattern is and Corresponding to RIV 2, RIV 3, RIV 4, and RIV 5, the number i of first resource block groups included in the second frequency domain resources in the first frequency domain resources corresponding to the candidate value is 2.

[0237] Table 5

[0238]

[0239]

[0240] (2) The terminal device determines the second sub-indication information based on the first indication information, and the second sub-indication information is used to indicate the pre-DMRS configuration pattern corresponding to the RIV, and determines the configuration of the number of pre-DMRS symbols of each first resource block group of the second frequency domain resources based on the second sub-indication information. Prior to this, the terminal device needs to obtain pattern information, and the pattern information is used to indicate the mapping relationship between multiple patterns and multiple index values. It should be understood that the multiple patterns here are multiple DMRS configuration patterns, and the pattern information can be pre-configured on the terminal device side, or sent to the terminal device by the network device. In other words, the terminal device determines the second sub-indication information based on the RIV and pattern information indicated by the first indication information, and the second sub-indication information is a pre-DMRS configuration pattern in the pattern information; and determines the configuration of the number of pre-DMRS symbols of each first resource block group of the second frequency domain resources based on the pattern.

[0241] It should be understood that (2) may include different situations in specific implementations. The following takes two possible methods as examples to introduce in detail the configuration of the terminal device determining the number of pre-DMRS symbols for each first resource block group of the second frequency domain resources.

[0242] Possible approach one, corresponding to the above-mentioned possible situation three, is that the terminal device determines the configuration of the number of pre-DMRS symbols of each first resource block group of the second frequency domain resources according to the second sub-indication information.

[0243] In the configuration pattern of the number of pre-DMRS symbols corresponding to the second frequency domain resource, 2 i RIV indicates all possible configurations of the number of pre-DMRS symbols of i first resource block groups in the second frequency domain resources. i Among the RIVs, any one RIV corresponds to the configuration of the number of pre-DMRS symbols of the i first resource block groups, and any two RIVs correspond to different configurations of the number of pre-DMRS symbols of the i first resource block groups. That is, the mapping relationship between multiple patterns and multiple index values ​​can be a mapping relationship between multiple patterns and multiple RIVs. One RIV in the multiple RIVs can uniquely correspond to one of the multiple patterns. Any pattern in the multiple patterns may include the configuration of the number of pre-DMRS symbols of each first resource block group in the i first resource block groups. Any two patterns in the multiple patterns are different. Among them, according to the method in (1), the multiple RIVs correspond to a frequency domain pattern, that is, the 2 i A RIV corresponds to a frequency domain pattern, which includes the sequence number RB of the starting resource block of the first frequency domain resource. start A candidate value and the number of consecutively allocated resource blocks L RBs A candidate value of . Wherein, the number of consecutive allocated resource blocks included in the frequency domain pattern is LRBs Greater than

[0244] Exemplarily, the number of first resource block groups included in the BWP of the terminal device is 8, and the terminal device determines n=2, and the number of first resource block groups included in the first frequency domain resources is 8, then i=2, that is, the second sub-indication information needs to indicate the number of pre-DMRS symbols of 2 first resource block groups, then 4 RIVs are required to indicate the number of pre-DMRS symbols configuration pattern, which are RIV1, RIV2, RIV3 and RIV4 respectively. The number of pre-DMRS symbols of the 2 first resource block groups corresponding to the 4 RIVs are shown in Table 6 below. Table 6 may be an example of pattern information.

[0245] Table 6

[0246]

[0247] The terminal device determines the configuration of the number of pre-DMRS symbols of the two first resource block groups according to the pre-DMRS symbol pattern indicated by the second sub-indication information. Specifically, assuming that the first quantity indicated by the third indication information in S604 is 1, when the terminal device receives RIV 0, it determines that the configuration of the number of pre-DMRS symbols of the two first resource block groups is [2, 2], then the terminal device can determine that the two first resource block groups are both second sub-frequency domain resources; when the terminal device receives RIV 1, it determines that the configuration of the number of pre-DMRS symbols of the two first resource block groups is [1, 2], then the terminal device can determine that the first resource block group 0 is the first sub-frequency domain resource, and the first resource block group 1 is the second sub-frequency domain resource; when the terminal device receives RIV 2, it determines that the configuration of the number of pre-DMRS symbols of the two first resource block groups is [2, 1], then the terminal device can determine that the first resource block group 0 is the second sub-frequency domain resource, and the first resource block group 1 is the first sub-frequency domain resource, and when the terminal device receives RIV 3, it determines that the configuration of the number of pre-DMRS symbols of the two first resource block groups is [1, 1], then the terminal device can determine that the two first resource block groups are both first sub-frequency domain resources.

[0248] Exemplarily, the number of first resource block groups included in the BWP of the terminal device is 8, and the terminal device determines n=2. If the number of first resource block groups included in the first frequency domain resource is 7, then i=1, that is, the second sub-indication information needs to indicate the number of pre-DMRS symbols of one first resource block group, then two RIVs are required to indicate the number of pre-DMRS symbols configuration patterns, which are RIV4 and RIV5 respectively. The number of pre-DMRS symbols of one first resource block group corresponding to the two RIVs is shown in Table 7 below. Table 7 may be an example of pattern information.

[0249] Table 7

[0250] RIV The number of leading DMRS symbols of the first resource block group 0 RIV 4 2 RIV 5 1

[0251] The terminal device determines the configuration of the pre-DMRS symbols of a first resource block group based on the RIV in the second sub-indication information. Specifically, assuming that the second number indicated by the third indication information in S604 is 1, when the terminal device receives RIV4, it determines that the configuration of the number of pre-DMRS symbols of a first resource block group is 2, then the terminal device can determine that the first resource block group is a first sub-frequency domain resource; when the terminal device receives RIV5, it determines that the configuration of the number of pre-DMRS symbols of a first resource block group is 1, then the terminal device can determine that the first resource block group is a second sub-frequency domain resource.

[0252] Optionally, the terminal device needs to obtain pattern information, which may include a mapping relationship between multiple patterns and multiple index values, and a mapping relationship between multiple index values ​​and frequency domain patterns. That is, the pattern information may include a mapping relationship between multiple patterns and multiple RIVs, and a mapping relationship between the multiple RIVs and frequency domain patterns. It should be understood that the pattern information may be pre-configured on the terminal device side, or may be sent to the terminal device by a network device. The mapping relationship between the multiple patterns and the multiple RIVs is as described above, and the mapping relationship between the multiple RIVs and the frequency domain patterns is the mapping relationship described in (1), which will not be repeated here.

[0253] Exemplarily, the frequency domain pattern and the pre-DMRS symbol number configuration pattern of the first frequency domain resource are shown in Table 8 and Table 9. Table 8 corresponds to Table 6 above, and Table 9 corresponds to Table 7 above.

[0254] In the example corresponding to Table 6, the terminal device receives the RIV in the first indication information and can determine the configuration of the number of pre-DMRS symbols for each first resource block group in the first frequency domain resources and the second frequency domain resources according to Table 8. Table 8 may be an example of pattern information.

[0255] Table 8

[0256]

[0257] In the example corresponding to Table 7, the terminal device receives the RIV in the first indication information and can determine the configuration of the number of pre-DMRS symbols for each first resource block group in the first frequency domain resources and the second frequency domain resources according to Table 9. Table 9 may be an example of pattern information.

[0258] Table 9

[0259]

[0260] Possible method two, corresponding to possible situations one and two above, the terminal device determines the configuration of the number of pre-DMRS symbols of each first resource block group of the second frequency domain resources based on the second sub-indication information, the third indication information in S604 and the pre-DMRS symbol number configuration pattern.

[0261] It should be understood that the third indication information in S604 indicates the first quantity or the second quantity. The pre-DMRS symbol number configuration pattern here only indicates whether the configuration of the number of pre-DMRS symbols of each first resource block group in the second frequency domain resources is the same as or different from the first quantity or the second quantity indicated by the third indication information. For example, when the third indication information indicates that the first quantity is 2, the pre-DMRS symbol number configuration pattern here uses 0 to indicate that the number of pre-DMRS symbols of a certain first resource block group is the same as the first quantity, that is, the number of pre-DMRS symbols of the first resource block group is 2, and uses 1 to indicate that the number of pre-DMRS symbols of a certain first resource block group is different from the first quantity, that is, the number of pre-DMRS symbols of the first resource block group is 1.

[0262] In the configuration pattern of the number of pre-DMRS symbols corresponding to the second frequency domain resource, 2 i RIV indicates all possible configurations of the number of pre-DMRS symbols of i first resource block groups in the second frequency domain resources. i Among the RIVs, any one RIV corresponds to the configuration of the number of pre-DMRS symbols of i first resource block groups, and any two RIVs correspond to different configurations of the number of pre-DMRS symbols of i first resource block groups.

[0263] Exemplarily, the number of first resource block groups included in the BWP of the terminal device is 8, and the terminal device determines n=2, and the number of first resource block groups included in the first frequency domain resources is 8, then i=2, that is, the second sub-indication information needs to indicate the number of pre-DMRS symbols of 2 first resource block groups, then 4 RIVs are required to indicate the configuration pattern of the number of pre-DMRS symbols, which are RIV1, RIV2, RIV3 and RIV4 respectively. The configuration pattern of the number of pre-DMRS symbols of the 2 first resource block groups corresponding to the 4 RIVs is shown in Table 10 below. In the configuration pattern of Table 10, 0 is used to indicate that the number of pre-DMRS symbols of a certain first resource block group is the same as the number indicated by the third indication information (the first number or the second number), and 1 is used to indicate that they are different.

[0264] Table 10

[0265]

[0266] The terminal device determines the configuration of the number of pre-DMRS symbols of the two first resource block groups based on the RIV in the second sub-indication information. Specifically, assuming that the first number indicated by the third indication information in S604 is 1, when the terminal device receives RIV0, it is determined that the configuration of the number of pre-DMRS symbols of the two first resource block groups is the same as the first number, then the terminal device can determine that the two first resource block groups are both first sub-frequency domain resources; when the terminal device receives RIV 1, it is determined that the configuration of the number of pre-DMRS symbols of the first resource block group 0 is different from the first number, and the configuration of the number of pre-DMRS symbols of the first resource block group 1 is the same as the first number, then the terminal device can determine that the first resource block group 0 is the second sub-frequency domain resource, and the first resource block group 1 is the first sub-frequency domain resource; when the terminal device receives RIV 2, it is determined that the configuration of the number of pre-DMRS symbols of the first resource block group 0 is the same as the first number, and the configuration of the number of pre-DMRS symbols of the first resource block group 1 is different from the first number, then the terminal device can determine that the first resource block group 0 is the first sub-frequency domain resource, and the first resource block group 1 is the second sub-frequency domain resource. 3, it is determined that the configuration of the number of pre-DMRS symbols of the two first resource block groups is different from the first number, then the terminal device can determine that the two first resource block groups are both second sub-frequency domain resources.

[0267] Exemplarily, the number of first resource block groups included in the BWP of the terminal device is 8, and the terminal device determines n=2. If the number of first resource block groups included in the first frequency domain resources is 7, then i=1, that is, the second sub-indication information needs to indicate the number of pre-DMRS symbols of one first resource block group, then two RIVs are required to indicate the configuration pattern of the number of pre-DMRS symbols, which are RIV4 and RIV5 respectively. The configuration pattern of the number of pre-DMRS symbols of one first resource block group corresponding to the two RIVs is shown in Table 11 below. In the configuration pattern of Table 11, 0 is used to indicate that the number of pre-DMRS symbols of a certain first resource block group is the same as the number indicated by the third indication information (the first number or the second number), and 1 is used to indicate that they are different.

[0268] Table 11

[0269] RIV The number of leading DMRS symbols of the first resource block group 0 RIV 4 0 RIV 5 1

[0270] The terminal device determines the configuration of the pre-DMRS symbols of a first resource block group based on the RIV in the second sub-indication information. Specifically, assuming that the second number indicated by the third indication information in S604 is 1, when the terminal device receives RIV4, it determines that the configuration of the number of pre-DMRS symbols of a first resource block group is the same as the first number, then the terminal device can determine that the first resource block group is a first sub-frequency domain resource; when the terminal device receives RIV5, it determines that the configuration of the number of pre-DMRS symbols of a first resource block group is different from the first number, then the terminal device can determine that the first resource block group is a second sub-frequency domain resource.

[0271] It should be noted that the RIV sent in the above-mentioned first sub-indication information and the second sub-indication information can be the same value, or one RIV is sent in the first indication information, and the terminal device determines the configuration of the number of pre-DMRS symbols of each first resource block group in the first frequency domain resources and the second frequency domain resources based on the one RIV.

[0272] Exemplarily, the frequency domain pattern and the pre-DMRS symbol number configuration pattern of the first frequency domain resource are shown in Table 12 and Table 13. Table 12 corresponds to Table 10 above, and Table 13 corresponds to Table 11 above.

[0273] In the example corresponding to Table 10, the terminal device receives the RIV in the first indication information and can determine the configuration of the number of pre-DMRS symbols of each first resource block group in the first frequency domain resources and the second frequency domain resources according to Table 12.

[0274] Table 12

[0275]

[0276] In the example corresponding to Table 11, the terminal device receives the RIV in the first indication information and can determine the configuration of the number of pre-DMRS symbols of each first resource block group in the first frequency domain resources and the second frequency domain resources according to Table 13.

[0277] Table 13

[0278]

[0279]

[0280] In a second possible example, in order to reduce the complexity of processing by the terminal device, n is taken as a fixed value of 1.

[0281] Exemplarily, the second preset condition is that the size of the first resource block group included in the first frequency domain resource is greater than The second preset condition is that the size of the first resource block group included in the first frequency domain resource is > in, is the size of the first resource block group, is the size of the BWP.

[0282] It should be understood that when the second preset condition is met, i>0, and because i≤n, i=1. The second frequency domain resource is a predetermined first resource block group.

[0283] (1) The terminal device determines the first frequency domain resource according to the first sub-indication information in the first indication information.

[0284] The first sub-indication information adopts the resource indication method of continuous resource allocation, and indicates the first frequency domain resource through RIV. The frequency domain pattern of the first frequency domain resource corresponds to 2 RIVs, which are recorded as the first RIV and the second RIV. Among them, the first RIV is not equal to the second RIV. The first RIV is less than the second preset threshold, and the second RIV is greater than or equal to the second preset threshold. The first RIV and the second RIV correspond to different numbers of pre-DMRS symbols respectively. The second preset threshold is in, is the size of the BWP.

[0285] The following is an example of how to calculate the first RIV and the second RIV.

[0286] Exemplarily, the first RIV is determined according to the RIV calculation method in the type 1 resource allocation type in 3GPP TS 38.214.

[0287] The second RIV can be determined as follows: When the second RIV is equal to when When the second RIV is equal to Among them, RB start is the sequence number of the starting resource block of the first frequency domain resource, L RBs is the number of consecutively allocated resource blocks, is the size of BWP, is the size of the first resource block group.

[0288] (2) The terminal device determines the configuration of the number of pre-DMRS symbols of each first resource block group of the second frequency domain resources according to the second sub-indication information in the first indication information.

[0289] The second sub-indication information includes an RIV. When the RIV is the first RIV, the terminal device determines that the number of pre-DMRS symbols of the second frequency domain resource is the same as the number of pre-DMRS symbols indicated by the third indication information; when the RIV is the second RIV, the terminal device determines that the number of pre-DMRS symbols of the second frequency domain resource is different from the number of pre-DMRS symbols indicated by the third indication information. Or, in other words, assuming that the third indication information indicates a first value, when the RIV is the first RIV, the terminal device determines that the number of pre-DMRS symbols of the second frequency domain resource is the first value; when the RIV is the second RIV, the terminal device determines that the number of pre-DMRS symbols of the second frequency domain resource is the second value, wherein the second value is not equal to the first value, and the first value and the second value are respectively one of {1, 2}.

[0290] As an example, the BWP of the terminal device includes 16 RBs, numbered RB 0 to 15, and the network device allocates RB 0 to 14 to the terminal device for receiving downlink signals, that is, the first frequency domain resources include RB 0 to 14, and the size of the first resource block group is 4. The first frequency domain resource includes a continuous allocation of RBs, which is greater than 15. That is, if the size of the first frequency domain resource meets the second preset condition, the continuous resource allocation pattern corresponding to the first frequency domain resource corresponds to two RIVs. The two are 63 and 167. The second preset threshold When the terminal device receives the RIV indicated by the second sub-indication information as 167, since the RIV is greater than 136, the terminal device determines that the number of pre-DMRS symbols of one first resource block group in the first frequency domain resource is 2. When the terminal device receives the RIV indicated by the second sub-indication information as 63, since the RIV is less than 136, the terminal device determines that the number of pre-DMRS symbols of one first resource block group in the first frequency domain resource is 1.

[0291] S602 is similar to S602 in the first possible implementation manner and will not be described in detail here.

[0292] The embodiments of the present application implement flexible resource configuration in the frequency domain by configuring different numbers of pre-DMRS symbols on the scheduled frequency domain resources according to communication needs, thereby reducing the overhead used to transmit DMRS. Furthermore, by reusing existing fields to indicate predetermined frequency domain resources in the scheduled frequency domain resources, the overhead of DCI indications is further reduced. Furthermore, when the size of the predetermined frequency domain resources is fixed, the embodiments of the present application can reduce the processing complexity of the terminal device.

[0293] Optionally, in S603, the network device sends second indication information to the terminal device, and accordingly, the terminal device receives the second indication information from the network device, where the second indication information is used to indicate frequency domain resources belonging to the first sub-frequency domain resources among other frequency domain resources in the first frequency domain resources except the second frequency domain resources, wherein the second frequency domain resources are frequency domain resources predetermined in the first frequency domain resources. In other words, the second indication information is used to indicate one or more resource block groups in the first frequency domain resources except the second frequency domain resources, and the one or more resource block groups belong to the first sub-frequency domain resources.

[0294] For example, Figure 8 As shown, the first frequency domain resource ( Figure 8 The boxes except S801 in the above-mentioned “other frequency domain resources” are the above-mentioned “other frequency domain resources”, and S804 is the frequency domain resources belonging to the first sub-frequency domain resources in the above-mentioned “other frequency domain resources”.

[0295] Among them, the way in which the second indication information indicates the frequency domain resources belonging to the first sub-frequency domain resources in the above-mentioned "other frequency domain resources" is similar to the way in which the second indication information indicates the first sub-frequency domain resources in S603 in the first possible implementation method, and will not be repeated here.

[0296] In the embodiment of the present application, in the frequency domain resources of the downlink signal sent by the bearer network device to the terminal device, the second indication information only needs to indicate resources other than the predetermined frequency domain resources, thereby reducing signaling overhead and saving resources.

[0297] The terminal device may determine the first sub-frequency domain resource based on the first sub-frequency domain resource indicated by the second indication information. The specific determination method is detailed in Method 1 and Method 2 in the first possible implementation method, which will not be described in detail here. The four possible methods for determining the size of the first resource block group are detailed in Possible Methods 1 to 4 in the first possible implementation method, which will not be described in detail here.

[0298] Optionally, S604 is similar to S604 in the first possible implementation manner and will not be described in detail here.

[0299] Optionally, method 600 also includes: the first sub-frequency domain resource corresponds to at least one first DMRS port, the second sub-frequency domain resource corresponds to at least one second DMRS port, and the number of the at least one first DMRS port is equal to the number of the at least one second DMRS port; when the index of any DMRS port included in the at least one first DMRS port is greater than a third threshold or the index of any DMRS port included in the one or more second DMRS ports is greater than the third threshold, the DMRS ports included in the at least one first DMRS port are different from the DMRS ports included in the at least one second DMRS port; when the indexes of all DMRS ports included in the at least one first DMRS port and the indexes of all DMRS ports included in the at least one second DMRS port are less than or equal to the third threshold, the DMRS ports included in the at least one first DMRS port are the same as the DMRS ports included in the at least one second DMRS port; wherein the at least one first DMRS port and the at least one second DMRS port are indicated by the third indication information, or the at least one first DMRS port is indicated by the third indication information, and the at least one second DMRS port is indicated by fourth indication information, and the fourth indication information is different from the third indication information.

[0300] For a detailed description of the above solution, please refer to the detailed description of possible approach 1 and possible approach 2 of the solution in the first possible implementation manner, which will not be elaborated here.

[0301] It should be noted that the first indication information, the second indication information and the third indication information in the present application solution can be sent by the network device to the terminal device through one DCI, or can be sent to the terminal device through different DCIs. Figure 6 The numbering of each indication information is only for the convenience of description and does not limit the order of the steps. In a specific implementation, the above indication information can be sent by the network device to the terminal device together, or can be sent by the network device to the terminal device one by one.

[0302] The third possible implementation method has main steps similar to those in the first possible implementation method. Taking (2) in S602 in the first possible implementation method as an example, it is necessary to replace the number of pre-DMRS ports in the first possible implementation method with the number of DMRS CDM groups that are not used to carry data.

[0303] The fourth possible implementation method has main steps similar to those in the second possible implementation method. Taking (2) in S602 in the second possible implementation method as an example, it is necessary to replace the number of pre-DMRS ports in the second possible implementation method with the number of DMRS CDM groups that are not used to carry data.

[0304] It should be understood that the value of the number of pre-DMRS ports can be 1 or 2. When the terminal device adopts DMRStype1, there are only two configurations of the number of DMRS CDM groups that are not used to carry data. Therefore, the third possible implementation method and the fourth possible implementation method are similar to the first possible implementation method and the second possible implementation method, respectively, and can uniquely determine the number of DMRS CDM groups that are not used to carry data in the second frequency domain resources. However, when the terminal device adopts DMRStype2, there are 3 configurations of the number of DMRS CDM groups that are not used to carry data, and thus the terminal device cannot uniquely determine the number of DMRS CDM groups that are not used to carry data.

[0305] The following example illustrates the differences between the third possible implementation and the first possible implementation:

[0306] Method 600 also includes the network device sending fifth indication information to the terminal device, and accordingly, the terminal device receiving the fifth indication information from the network device, where the fifth indication information is used to indicate the number of DMRS CDM groups that are not used for carrying data in the first sub-frequency domain resources. The terminal device determines the configuration of the number of DMRS CDM groups that are not used for carrying data for all first resource block groups in the first frequency domain resources based on the fifth indication information.

[0307] The following is a detailed description taking the third indication information indicating the second quantity and the third indication information indicating the first quantity as examples.

[0308] Optionally, when the third indication information indicates the second quantity, the fifth indication information may indicate the number of DMRS CDM groups corresponding to the first sub-frequency domain resources that are not used to carry data by indicating an index, or the fifth indication information may indicate the difference between the number of DMRS CDM groups corresponding to the first sub-frequency domain resources that are not used to carry data and the second quantity by indicating an index.

[0309] As an example, the fifth indication information indicates, by way of index, the number of DMRS CDM groups corresponding to the first sub-frequency domain resources that are not used to carry data.

[0310] For example, as shown in Table 14, when the second number indicated by the third indication information is 1, assuming that the fifth indication information indicates index 0, the terminal device determines that the number of DMRS CDM groups that are not used for carrying data in the first sub-frequency domain resource is 2; when the second number indicated by the third indication information is 1, assuming that the fifth indication information indicates index 1, the terminal device determines that the number of DMRS CDM groups that are not used for carrying data in the first sub-frequency domain resource is 3; when the second number indicated by the third indication information is 2, assuming that the fifth indication information indicates index 0, the terminal device determines that the number of DMRS CDM groups that are not used for carrying data in the first sub-frequency domain resource is 1, and when the second number indicated by the third indication information is 2, assuming that the fifth indication information indicates index 1, the terminal device determines that the number of DMRS CDM groups that are not used for carrying data in the first sub-frequency domain resource is 3; when the second number indicated by the third indication information is 3, assuming that the fifth indication information indicates index 0, the terminal device determines that the DMRS CDM groups that are not used for carrying data in the first sub-frequency domain resource is The number of CDM groups is 2; when the second number indicated by the third indication information is 3, assuming that the fifth indication information indicates index 1, the terminal device determines that the number of DMRS CDM groups of the first sub-frequency domain resources that are not used to carry data is 1.

[0311] Table 14

[0312]

[0313] As another example, the fifth indication information may represent the difference between the number of DMRS CDM groups not used for carrying data and the second number corresponding to the first sub-frequency domain resources in an indexed manner.

[0314] For example, as shown in Table 15, when the second quantity is 1, the fifth indication information indicates index 0, and the terminal device determines that the number of DMRS CDM groups that are not used for carrying data in the first sub-frequency domain resources is 2; when the second quantity is 1, the fifth indication information indicates index 1, and the terminal device determines that the number of DMRS CDM groups that are not used for carrying data in the first sub-frequency domain resources is 3; when the second quantity is 2, the fifth indication information indicates index 0, and the terminal device determines that the number of DMRS CDM groups that are not used for carrying data in the first sub-frequency domain resources is 1; when the second quantity is 2, the fifth indication information indicates index 1, and the terminal device determines that the number of DMRS CDM groups that are not used for carrying data in the first sub-frequency domain resources is 3; when the second quantity is 3, the fifth indication information indicates index 0, and the terminal device determines that the number of DMRS CDM groups that are not used for carrying data in the first sub-frequency domain resources is 2; when the second quantity is 3, the fifth indication information indicates index 1, and the terminal device determines that the number of DMRS CDM groups that are not used for carrying data in the first sub-frequency domain resources is 1.

[0315] Table 15

[0316]

[0317] Optionally, when the third indication information indicates the first quantity, the fifth indication information may indicate the number of DMRS CDM groups corresponding to the second sub-frequency domain resources that are not used to carry data by indicating an index, or the fifth indication information may indicate the difference between the number of DMRS CDM groups corresponding to the second sub-frequency domain resources that are not used to carry data and the first quantity by indicating an index.

[0318] The specific implementation method is similar to when the third indication information indicates the second quantity, and will not be elaborated here.

[0319] For the third possible implementation method, the embodiment of the present application realizes flexible resource configuration in the frequency domain and reduces the overhead for transmitting DMRS by configuring different numbers of DMRS CDM groups that are not used to carry data on the scheduled frequency domain resources according to communication needs.

[0320] The following example illustrates the difference between the fourth possible implementation and the second possible implementation:

[0321] (1) When the second sub-indication information in S601 indicates the number of DMRS CDM groups that are not used for carrying data in the first resource block group in the second frequency domain resource by means of an index, assuming that the configuration of the number of DMRS CDM groups that are not used for carrying data corresponding to different first resource block groups in the first frequency domain resource includes three cases, namely 1, 2, and 3, it can only be applied to "possible case three", namely, the second sub-indication information is used to indicate the number of DMRS CDM groups that are not used for carrying data corresponding to each resource block group in the second frequency domain resource, wherein the number of DMRS CDM groups that are not used for carrying data in the second frequency domain resource is the first number of resource block groups belonging to the first sub-frequency domain resource, and the number of pre-DMRS symbols or the number of DMRS CDM groups that are not used for carrying data in the second frequency domain resource is the second number of resource block groups belonging to the second sub-frequency domain resource; assuming that different first resource block groups in the first frequency domain resource correspond to DMRS that are not used for carrying data The configuration of the number of CDM groups includes only two cases, if 1, 2, or 2, 3, or 1, 3, then "possible case 1", "possible case 2" and "possible case 3" in S601 can be applied.

[0322] It should be noted that, when specifically indicating, the number of DMRS CDM groups not used to carry data may be directly indicated, or the difference between each first resource block group in the second frequency domain resources and the second number indicated by the third indication information may be indicated.

[0323] For example, when the number of DMRS CDM groups not used to carry data or the above difference is indicated in a pattern, the number of RIVs corresponding to the second frequency domain resources including i first resource block groups is 3. i .

[0324] (2) Method 600 further includes the network device sending fifth indication information to the terminal device, and correspondingly, the terminal device receiving the fifth indication information from the network device, where the fifth indication information is used to indicate the number of DMRS CDM groups that are not used for carrying data in the first sub-frequency domain resources. The terminal device determines, based on the fifth indication information, the configuration of the number of DMRS CDM groups that are not used for carrying data in all first resource block groups in the first frequency domain resources.

[0325] For specific implementation, please refer to the relevant solutions in the above “Differences between the third possible implementation method and the first possible implementation method”, which will not be elaborated here.

[0326] For the fourth possible implementation method, in an embodiment of the present application, DMRS ports are respectively configured for two parts of frequency domain resources with different numbers of DMRS CDM groups that are not used to carry data in the frequency domain resources that carry signals transmitted between network devices and terminal devices, thereby realizing flexible resource configuration in the frequency domain, avoiding waste of DMRS port resources, and improving the flexibility of resource scheduling.

[0327] The fifth possible implementation method is that when DMRStype2 is used, there are three configurations of the number of DMRS CDM groups that are not used to carry data, that is, the number of DMRS CDM groups that are not used to carry data is 1 or 2 or 3, and the first frequency domain resources include the first sub-frequency domain resources, the second sub-frequency domain resources and the third sub-frequency domain resources, and the number of DMRS CDM groups that are not used to carry data corresponding to the three parts of the sub-frequency domain resources is different. Based on the above third possible implementation method, there is the following difference: the terminal device determines the number of DMRS CDM groups that are not used to carry data in the third sub-frequency domain resources according to the configuration of the number of DMRS CDM groups that are not used to carry data in the first sub-frequency domain resources and the second sub-frequency domain resources.

[0328] For the fifth possible implementation method, in an embodiment of the present application, DMRS ports are respectively configured for two parts of frequency domain resources with different numbers of DMRS CDM groups that are not used to carry data in the frequency domain resources that carry signals transmitted between network devices and terminal devices, thereby realizing flexible resource configuration in the frequency domain, avoiding waste of DMRS port resources, and improving the flexibility of resource scheduling.

[0329] The sixth possible implementation method is that when DMRStype2 is used, there are three configurations of the number of DMRS CDM groups that are not used to carry data, that is, the number of DMRS CDM groups that are not used to carry data is 1 or 2 or 3, and the first frequency domain resources include the first sub-frequency domain resources, the second sub-frequency domain resources and the third sub-frequency domain resources, and the number of DMRS CDM groups that are not used to carry data corresponding to the three parts of sub-frequency domain resources is different. Based on the above third possible implementation method, there is the following difference: the terminal device determines the number of DMRS CDM groups that are not used to carry data in the third sub-frequency domain resources according to the configuration of the number of DMRS CDM groups that are not used to carry data in the first sub-frequency domain resources and the second sub-frequency domain resources.

[0330] For the sixth possible implementation method, in an embodiment of the present application, DMRS ports are respectively configured for two parts of frequency domain resources with different numbers of DMRS CDM groups that are not used to carry data in the frequency domain resources that carry signals transmitted between network devices and terminal devices, thereby realizing flexible resource configuration in the frequency domain, avoiding waste of DMRS port resources, and improving the flexibility of resource scheduling.

[0331] The seventh possible implementation method is applicable to the flexible scheduling of the number of pre-DMRS symbols corresponding to each first resource block group on the first frequency domain resources, or, when DMRS type1 is used, the number of DMRS CDM groups that are not used for carrying data corresponding to each first resource block group on the first frequency domain resources are flexible scheduled, or, when DMRS type2 is used and the number of DMRS CDM groups that are not used for carrying data includes only two configuration situations, the number of DMRS CDM groups that are not used for carrying data corresponding to each first resource block group on the first frequency domain resources are flexible scheduled.

[0332] It should be noted that the seventh possible implementation method is described below only by taking the number of pre-DMRS symbols as an example. The "number of pre-DMRS symbols" in the following scheme can also be replaced by the "number of DMRSCDM groups not used to carry data."

[0333] S601, the network device sends first indication information to the terminal device, and accordingly, the terminal device receives the first indication information from the network device, where the first indication information is used to indicate a first frequency domain resource.

[0334] It should be understood that the first frequency domain resource here can be understood as a resource configured by the scheduled UE, or can be understood as a frequency domain resource used to carry a downlink signal sent by the network device to the terminal device. Exemplarily, the first frequency domain resource is part of the BWP. Exemplarily, the network device indicates the first frequency domain resource to the terminal device via the "Frequency Domain Resource Allocation" field in the DCI.

[0335] S602: The network device sends a PDSCH on a first frequency domain resource, and correspondingly, the terminal device receives a PDSCH on the first frequency domain resource.

[0336] Optionally, in S603, the network device sends second indication information to the terminal device, and accordingly, the terminal device receives the second indication information from the network device.

[0337] Optionally, in S604, the network device sends third indication information to the terminal device, and accordingly, the terminal device receives the third indication information from the network device.

[0338] The following examples respectively describe the contents indicated by the second indication information and the third indication information.

[0339] Example 1, the third indication information is used to indicate the number of pre-DMRS symbols of the first resource block group with the smallest index in the first frequency domain resource, and the second indication information is used to indicate that the number of pre-DMRS symbols of one or more first resource block groups in the first frequency domain resource is different from the number of pre-DMRS symbols of the first resource block group with the smallest index, and the one or more first resource block groups belong to other first resource block groups except the first resource block group with the smallest index.

[0340] Example 2, the third indication information is used to indicate the number of pre-DMRS symbols of the first resource block group with the smallest index in the first frequency domain resource, and the second indication information is used to indicate that the number of pre-DMRS symbols of one or more first resource block groups in the first frequency domain resource is the same as the number of pre-DMRS symbols of the first resource block group with the smallest index, and the one or more first resource block groups belong to other first resource block groups except the first resource block group with the smallest index.

[0341] Example 3, the third indication information is used to indicate the number of pre-DMRS symbols of the first resource block group with the largest index in the first frequency domain resource, and the second indication information is used to indicate that the number of pre-DMRS symbols of one or more first resource block groups in the first frequency domain resource is different from the number of pre-DMRS symbols of the first resource block group with the largest index, and the one or more first resource block groups belong to other first resource block groups except the first resource block group with the largest index.

[0342] Example 4, the third indication information is used to indicate the number of pre-DMRS symbols of the first resource block group with the largest index in the first frequency domain resource, and the second indication information is used to indicate that the number of pre-DMRS symbols of one or more first resource block groups in the first frequency domain resource is the same as the number of pre-DMRS symbols of the first resource block group with the largest index, and the one or more first resource block groups belong to other first resource block groups except the first resource block group with the largest index.

[0343] The following combination Figure 7 , the solution of Example 1 is introduced in detail. Figure 7 As shown, there are 4 first resource block groups, namely first resource block groups 0, 1, 2, and 3, and their indexes are 0, 1, 2, and 3, respectively. Among them, the first resource block group with the smallest index is the first resource block group 0. Assuming that the third indication information is used to indicate that the number of pre-DMRS symbols of the first resource block group 0 is 1, and the second indication information is used to indicate that the number of pre-DMRS symbols of the first resource block groups 1 and 2 is different from the number of pre-DMRS symbols of the first resource block group 0, the terminal device determines that the number of pre-DMRS symbols of the first resource block groups 1 and 2 is 2 according to the second indication information. Further, the terminal device determines that the number of pre-DMRS symbols of the first resource block group 3 is 1. Subsequently, in S602, the terminal device receives the PDSCH on the first frequency domain resource according to the configuration of the pre-DMRS symbol on the first frequency domain resource.

[0344] It should be noted that the first indication information, the second indication information and the third indication information in the present application solution can be sent by the network device to the terminal device through one DCI, or can be sent to the terminal device through different DCIs. Figure 6 The numbering of each indication information is only for the convenience of description and does not limit the order of the steps. In a specific implementation, the above indication information can be sent by the network device to the terminal device together, or can be sent by the network device to the terminal device one by one.

[0345] In an embodiment of the present application, for two parts of frequency domain resources with different numbers of DMRS CDM groups that are not used to carry data configured in the frequency domain resources that carry signals transmitted between network devices and terminal devices, DMRS ports or the number of DMRS CDM groups that are not used to carry data are respectively configured, thereby realizing flexible resource configuration in the frequency domain, avoiding waste of DMRS port resources, and improving the flexibility of resource scheduling.

[0346] Above, combined Figures 6 to 8 The method provided in the embodiment of the present application is described in detail. Figures 9 and 10 The communication device provided in the embodiments of the present application is described in detail.

[0347] Figure 9 : is a schematic block diagram of a communication device for resource configuration provided by an embodiment of the present application. Figure 9 As shown, the communication device 10 may include a transceiver module 11 and a processing module 12 .

[0348] The transceiver module 11 can be used to receive information sent by other devices, and can also be used to send information to other devices. For example, it can receive first indication information or send second indication information. The processing module 12 can be used to process the content of the device, for example, to obtain pattern information.

[0349] In one possible design, the communication device 10 may correspond to the network device in the above method embodiment.

[0350] Specifically, the communication device 10 may correspond to the network device in method 600 according to an embodiment of the present application. The communication device 10 may include a module for executing the operations performed by the network device in the corresponding method, and each unit in the communication device 10 is for implementing the operations performed by the network device in the corresponding method.

[0351] Exemplarily, when the communication apparatus 10 corresponds to the network device in the method 600 , the transceiver module 11 is configured to execute steps S601 , S602 , S603 , and S604 .

[0352] Specifically, in a possible embodiment, the transceiver module 11 is used to send first indication information, which is used to indicate the first frequency domain resource; the transceiver module 11 is also used to send a physical downlink shared channel PDSCH on the first frequency domain resource; wherein the first number of the PDSCH is different from the second number of the PDSCH, and the first frequency domain resource includes a first sub-frequency domain resource and a second sub-frequency domain resource, the first number is the number of pre-demodulation reference signal DMRS symbols corresponding to the first sub-frequency domain resource, and the second number is the number of pre-DMRS symbols corresponding to the second sub-frequency domain resource, or the first number is the number of DMRS code division multiplexing CDM groups corresponding to the first sub-frequency domain resource that are not used to carry data, and the second number is the number of DMRS CDM groups corresponding to the second sub-frequency domain resource that are not used to carry data.

[0353] The above solution implements flexible resource configuration in the frequency domain and reduces the overhead for transmitting DMRS by configuring different numbers of pre-DMRS symbols on the scheduled frequency domain resources according to communication needs.

[0354] The transceiver module 11 is further configured to send second indication information to the terminal device, where the second information is configured to indicate the first sub-frequency domain resource in the first frequency domain resource.

[0355] The second sub-frequency domain resource is the frequency domain resource in the first frequency domain resource except the first sub-frequency domain resource.

[0356] Among them, the transceiver module 11 is also used to send a second indication information to the terminal device, and the second indication information is used to indicate the frequency domain resources belonging to the first sub-frequency domain resources in other frequency domain resources in the first frequency domain resources except the second frequency domain resources, wherein the second frequency domain resources are frequency domain resources predetermined in the first frequency domain resources.

[0357] The first indication information includes first sub-indication information and second sub-indication information, the first sub-indication information is used to indicate the first frequency domain resource, the second sub-indication information is used to indicate one or more first resource block groups in the second frequency domain resource, the one or more first resource block groups belong to the first sub-frequency domain resource, and other resource block groups in the second frequency domain resource except the one or more first resource block groups belong to the second sub-frequency domain resource, or the second sub-indication information is used to indicate one or more second resource block groups in the second frequency domain resource, the one or more second resource block groups belong to the second sub-frequency domain resource, and other resource block groups in the second frequency domain resource except the one or more second resource block groups belong to the first sub-frequency domain resource, or the second sub-indication information is used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRS CDM groups not used for carrying data, wherein the number of pre-DMRS symbols or DMRS not used for carrying data in the second frequency domain resource The resource block group whose number of CDM groups is the first number belongs to the first sub-frequency domain resource, and the resource block group whose number of pre-DMRS symbols or DMRSCDM groups not used for carrying data in the second frequency domain resource is the second number belongs to the second sub-frequency domain resource.

[0358] Among them, the first frequency domain resource belongs to the third frequency domain resource, and the third frequency domain resource satisfies at least one of the following items: the number of resource blocks included in the third frequency domain resource is not M, and M belongs to the preset first number set; the number of resource blocks included in the third frequency domain resource is N, and N belongs to the preset second number set; the relationship between the number of resource blocks included in the third frequency domain resource and the number of resource blocks included in the first resource block group satisfies the first preset condition.

[0359] The device further includes: a processing module 12, for obtaining pattern information, the pattern information being used to indicate a mapping relationship between multiple patterns and multiple index values, wherein the first frequency domain resource corresponds to the multiple index values, or the pattern information being used to indicate a mapping relationship between multiple patterns and multiple index values, and a corresponding relationship between the first frequency domain resource and the multiple index values, each pattern being used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRS CDM groups not used to carry data; the processing module 12 is also used to determine a first index value based on the pattern information and the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRS CDM groups not used to carry data, and the first indication information includes the first index value.

[0360] The ratio of the number of resource block groups included in the first frequency domain resources to the number of resource block groups included in the third frequency domain resources and the number of resource blocks included in the resource block groups satisfy a first corresponding relationship.

[0361] The transceiver module 11 is further configured to send third information to the terminal device, where the third information is configured to indicate the first quantity or the second quantity.

[0362] In another possible design, the communication device 10 may correspond to the terminal equipment in the above method embodiment.

[0363] Specifically, the communication device 10 may correspond to the terminal device in method 600 according to an embodiment of the present application. The communication device 10 may include a module for executing the operations performed by the terminal device in the corresponding method, and each unit in the communication device 10 is for implementing the operations performed by the terminal device in the corresponding method.

[0364] Exemplarily, when the communication apparatus 10 corresponds to the terminal device in the method 600 , the transceiver module 11 is configured to execute steps S601 , S602 , S603 , and S604 .

[0365] Specifically, in a possible embodiment, the transceiver module 11 is used to receive first indication information from a network device, where the first indication information is used to indicate a first frequency domain resource; the transceiver module 11 is also used to receive a physical downlink shared channel PDSCH on the first frequency domain resource based on the first indication information, wherein the first number of the PDSCH is different from the second number of the PDSCH, and the first frequency domain resource includes a first sub-frequency domain resource and a second sub-frequency domain resource, the first number is the number of pre-demodulation reference signal DMRS symbols corresponding to the first sub-frequency domain resource, and the second number is the number of pre-DMRS symbols corresponding to the second sub-frequency domain resource, or the first number is the number of DMRS code division multiplexing CDM groups corresponding to the first sub-frequency domain resource that are not used to carry data, and the second number is the number of DMRS CDM groups corresponding to the second sub-frequency domain resource that are not used to carry data.

[0366] The above solution implements flexible resource configuration in the frequency domain and reduces the overhead for transmitting DMRS by configuring different numbers of pre-DMRS symbols on the scheduled frequency domain resources according to communication needs.

[0367] The transceiver module 11 is further configured to receive second indication information, where the second indication information is configured to indicate the first sub-frequency domain resource in the first frequency domain resource.

[0368] The second sub-frequency domain resource is the frequency domain resource in the first frequency domain resource except the first sub-frequency domain resource.

[0369] Among them, the transceiver module 11 is also used to receive second indication information, and the second indication information is used to indicate the frequency domain resources belonging to the first sub-frequency domain resources in other frequency domain resources in the first frequency domain resources except the second frequency domain resources, wherein the second frequency domain resources are predetermined frequency domain resources in the first frequency domain resources.

[0370] The first indication information includes first sub-indication information and second sub-indication information, the first sub-indication information is used to indicate the first frequency domain resource, the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, the one or more resource block groups belong to the first sub-frequency domain resource, and other resource block groups in the second frequency domain resource except the one or more resource block groups belong to the second sub-frequency domain resource, or the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, the one or more resource block groups belong to the second sub-frequency domain resource, and other resource block groups in the second frequency domain resource except the one or more resource block groups belong to the first sub-frequency domain resource, or the second sub-indication information is used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups not used for carrying data, wherein the number of pre-DMRS symbols or the number of DMRSCDM groups not used for carrying data in the second frequency domain resource is the first number of resource block groups belonging to the first sub-frequency domain resource, and the number of pre-DMRS symbols or the number of DMRSCDM groups not used for carrying data in the second frequency domain resource Resource block groups having a second number of CDM groups belong to the second sub-frequency domain resources.

[0371] Among them, the first frequency domain resource belongs to the third frequency domain resource, and the third frequency domain resource satisfies at least one of the following items: the number of resource blocks included in the third frequency domain resource is not M, and M belongs to the preset first number set; the number of resource blocks included in the third frequency domain resource is N, and N belongs to the preset second number set; the relationship between the number of resource blocks included in the third frequency domain resource and the number of resource blocks included in the first resource block group satisfies the first preset condition.

[0372] In which, the device also includes: a processing module 12, used to obtain pattern information, the pattern information is used to indicate the mapping relationship between multiple patterns and multiple index values, wherein the first frequency domain resource corresponds to the multiple index values, or the pattern information is used to indicate the mapping relationship between multiple patterns and multiple index values, and the corresponding relationship between the first frequency domain resource and the multiple index values, each pattern is used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups not used to carry data; the first indication information includes a first index value, and the processing module 12 is also used to determine the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups not used to carry data according to the pattern corresponding to the first index value.

[0373] Among them, the ratio of the number of resource block groups included in the first frequency domain resources to the number of resource block groups included in the third frequency domain resources and the number of resource blocks contained in the resource block group satisfy a first corresponding relationship, and the third frequency domain resources include the first frequency domain resources.

[0374] The transceiver module 11 is further configured to receive third indication information, where the third indication information is configured to indicate the first quantity or the second quantity.

[0375] Figure 10 A schematic diagram of a resource configuration apparatus 20 provided in an embodiment of the present application.

[0376] In one possible design, the device 20 may be a network device, or a chip or chip system located on the network device.

[0377] In one possible design, the device 20 can be a terminal device, including various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem with wireless communication functions, as well as various forms of terminals, mobile stations, terminals, user equipment, soft terminals, etc., or a chip or chip system located on the terminal device.

[0378] The device 20 may include a processor 21 (ie, an example of a processing module) and a memory 22. The memory 22 is used to store instructions, and the processor 21 is used to execute the instructions stored in the memory 22, so that the device 20 can implement the following Figures 4 to 9 The steps performed by the device in the above various possible designs in the corresponding method.

[0379] Furthermore, the device 20 may also include an input port 23 (i.e., an example of a transceiver module) and an output port 24 (i.e., another example of a transceiver module). Furthermore, the processor 21, memory 22, input port 23, and output port 24 may communicate with each other through an internal connection path to transmit control and / or data signals. The memory 22 is used to store a computer program, and the processor 21 may be used to call and run the computer program from the memory 22 to control the input port 23 to receive signals and control the output port 24 to send signals, thereby completing the steps of the terminal device, wireless access network device, UE, or base station in the above method. The memory 22 may be integrated into the processor 21 or may be provided separately from the processor 21.

[0380] Alternatively, if the message transmission device 20 is a communication device, the input port 23 is a receiver and the output port 24 is a transmitter. The receiver and transmitter may be the same or different physical entities. When they are the same physical entity, they may be collectively referred to as a transceiver.

[0381] Optionally, if the device 20 is a chip or a circuit, the input port 23 is an input interface, and the output port 24 is an output interface.

[0382] As an implementation method, the functions of the input port 23 and the output port 34 can be implemented by a transceiver circuit or a dedicated transceiver chip. The processor 21 can be implemented by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.

[0383] As another implementation, it is possible to implement the device provided in the embodiments of the present application using a general-purpose computer. Specifically, the program code that implements the functions of the processor 21, input port 23, and output port 24 is stored in the memory 22, and the general-purpose processor executes the code in the memory 22 to implement the functions of the processor 21, input port 23, and output port 24.

[0384] Among them, each module or unit in the device 20 can be used to execute each action or processing process performed by the device (for example, terminal device) performing random access in the above method. Here, in order to avoid redundancy, its detailed description is omitted.

[0385] For the concepts, explanations, detailed descriptions and other steps involved in the device 20 and related to the technical solutions provided in the embodiments of the present application, please refer to the descriptions of these contents in the aforementioned methods or other embodiments, which will not be repeated here.

[0386] It should be understood that in the embodiments of the present application, the processor may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0387] An embodiment of the present application also provides a computer-readable storage medium on which computer instructions for implementing the method executed by the network device or terminal device in the above method embodiment are stored.

[0388] For example, when the computer program is executed by a computer, the computer can implement the method performed by the network device or the terminal device in the above method embodiment.

[0389] An embodiment of the present application also provides a computer-readable storage medium on which computer instructions for implementing the method executed by the network device or terminal device in the above method embodiment are stored.

[0390] For example, when the computer program is executed by a computer, the computer can implement the method performed by the network device or the terminal device in the above method embodiment.

[0391] It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0392] The above embodiments can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state drive.

[0393] It should be understood that the term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0394] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0395] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application. Those skilled in the art will clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. On the other hand, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, which may be electrical, mechanical or other forms.

[0396] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment. In addition, the functional units in the various embodiments of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. If the functions are implemented in the form of software functional units and sold or used as independent products, they may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the portion that contributes to the prior art, or the portion of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in the various embodiments of the present application. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard drive, ROM, RAM, a magnetic disk, or an optical disk.

[0397] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A method for resource allocation, characterized in that: include: receiving first indication information from a network device, where the first indication information is used to indicate a first frequency domain resource; receiving a physical downlink shared channel PDSCH on a first frequency domain resource based on the first indication information, The first number of the PDSCHs is different from the second number of the PDSCHs, the first frequency domain resources include first sub-frequency domain resources and second sub-frequency domain resources, The first number is the number of pre-demodulation reference signal DMRS symbols corresponding to the first sub-frequency domain resources, and the second number is the number of pre-DMRS symbols corresponding to the second sub-frequency domain resources, or The first number is the number of DMRS code division multiplexing (CDM) groups corresponding to the first sub-frequency domain resources that are not used to carry data, and the second number is the number of DMRS CDM groups corresponding to the second sub-frequency domain resources that are not used to carry data.

2. The method according to claim 1, characterized in that The method further comprises: Second indication information is received, where the second indication information is used to indicate the first sub-frequency domain resource in the first frequency domain resource.

3. The method according to claim 1 or 2, characterized in that The second sub-frequency domain resources are frequency domain resources in the first frequency domain resources except the first sub-frequency domain resources.

4. The method according to claim 1, wherein The method further comprises: Receive second indication information, where the second indication information is used to indicate frequency domain resources belonging to the first sub-frequency domain resources in other frequency domain resources in the first frequency domain resources except the second frequency domain resources, wherein the second frequency domain resources are frequency domain resources predetermined in the first frequency domain resources.

5. The method according to claim 4, characterized in that The first indication information includes first sub-indication information and second sub-indication information, the first sub-indication information is used to indicate the first frequency domain resource, The second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resources, the one or more resource block groups belong to the first sub-frequency domain resources, and other resource block groups in the second frequency domain resources except the one or more resource block groups belong to the second sub-frequency domain resources, or The second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resources, the one or more resource block groups belong to the second sub-frequency domain resources, and other resource block groups in the second frequency domain resources except the one or more resource block groups belong to the first sub-frequency domain resources, or The second sub-indication information is used to indicate the number of pre-DMRS symbols or the number of DMRS CDM groups not used to carry data corresponding to each resource block group in the second frequency domain resources, wherein the resource block group whose number of pre-DMRS symbols or the number of DMRS CDM groups not used to carry data in the second frequency domain resources is a first number belongs to the first sub-frequency domain resources, and the resource block group whose number of pre-DMRS symbols or the number of DMRS CDM groups not used to carry data in the second frequency domain resources is a second number belongs to the second sub-frequency domain resources.

6. The method according to claim 4 or 5, characterized in that The first frequency domain resource belongs to a third frequency domain resource, and the third frequency domain resource satisfies at least one of the following: The number of resource blocks included in the third frequency domain resources is not M, and M belongs to a preset first number set; The number of resource blocks included in the third frequency domain resources is N, and N belongs to a preset second number set; The relationship between the number of resource blocks included in the third frequency domain resources and the number of resource blocks included in the first resource block group meets a first preset condition.

7. The method according to claim 4 or 5, characterized in that The method further comprises: Get pattern information, The pattern information is used to indicate a mapping relationship between a plurality of patterns and a plurality of index values, wherein the first frequency domain resource corresponds to the plurality of index values, or The pattern information is used to indicate a mapping relationship between multiple patterns and multiple index values, and a corresponding relationship between the first frequency domain resources and the multiple index values. Each pattern is used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resources or the number of DMRS CDM groups not used for carrying data; The first indication information includes a first index value, and according to the pattern corresponding to the first index value, the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resources or the number of DMRS CDM groups not used for carrying data is determined.

8. The method according to any one of claims 1 or 2, 4 or 5, characterized in that The ratio of the number of resource block groups included in the first frequency domain resources to the number of resource block groups included in the third frequency domain resources satisfies a first corresponding relationship with the number of resource blocks included in the resource block groups, and the third frequency domain resources include the first frequency domain resources.

9. The method according to any one of claims 1 or 2, 4 or 5, characterized in that The method further comprises: Third indication information is received, where the third indication information is used to indicate the first quantity or the second quantity.

10. A signal transmission method, characterized in that: include: Sending first indication information, where the first indication information is used to indicate a first frequency domain resource; Sending a physical downlink shared channel PDSCH on the first frequency domain resources; in, The first number of the PDSCHs is different from the second number of the PDSCHs, the first frequency domain resources include first sub-frequency domain resources and second sub-frequency domain resources, The first number is the number of pre-demodulation reference signal DMRS symbols corresponding to the first sub-frequency domain resources, and the second number is the number of pre-DMRS symbols corresponding to the second sub-frequency domain resources, or The first number is the number of DMRS code division multiplexing (CDM) groups corresponding to the first sub-frequency domain resources that are not used to carry data, and the second number is the number of DMRS CDM groups corresponding to the second sub-frequency domain resources that are not used to carry data.

11. The method according to claim 10, characterized in that The method further comprises: Send second indication information to the terminal device, where the second indication information is used to indicate the first sub-frequency domain resource in the first frequency domain resource.

12. The method according to claim 10 or 11, characterized in that The second sub-frequency domain resources are frequency domain resources in the first frequency domain resources except the first sub-frequency domain resources.

13. The method according to claim 10, characterized in that The method further comprises: Send second indication information to the terminal device, where the second indication information is used to indicate the frequency domain resources belonging to the first sub-frequency domain resources in other frequency domain resources in the first frequency domain resources except the second frequency domain resources, wherein the second frequency domain resources are frequency domain resources predetermined in the first frequency domain resources.

14. The method according to claim 13, characterized in that The first indication information includes first sub-indication information and second sub-indication information, the first sub-indication information is used to indicate the first frequency domain resource, The second sub-indication information is used to indicate one or more first resource block groups in the second frequency domain resources, the one or more first resource block groups belong to the first sub-frequency domain resources, and other resource block groups in the second frequency domain resources except the one or more first resource block groups belong to the second sub-frequency domain resources, or The second sub-indication information is used to indicate one or more second resource block groups in the second frequency domain resources, the one or more second resource block groups belong to the second sub-frequency domain resources, and other resource block groups in the second frequency domain resources except the one or more second resource block groups belong to the first sub-frequency domain resources, or The second sub-indication information is used to indicate the number of pre-DMRS symbols or the number of DMRS CDM groups not used to carry data corresponding to each resource block group in the second frequency domain resources, wherein the resource block group whose number of pre-DMRS symbols or the number of DMRS CDM groups not used to carry data in the second frequency domain resources is a first number belongs to the first sub-frequency domain resources, and the resource block group whose number of pre-DMRS symbols or the number of DMRS CDM groups not used to carry data in the second frequency domain resources is a second number belongs to the second sub-frequency domain resources.

15. The method according to claim 13, characterized in that The first frequency domain resource belongs to a third frequency domain resource, and the third frequency domain resource satisfies at least one of the following: The number of resource blocks included in the third frequency domain resources is not M, and M belongs to a preset first number set; The number of resource blocks included in the third frequency domain resources is N, and N belongs to a preset second number set; The relationship between the number of resource blocks included in the third frequency domain resources and the number of resource blocks included in the first resource block group meets a first preset condition.

16. The method according to claim 13, characterized in that The method further comprises: Get pattern information, The pattern information is used to indicate a mapping relationship between a plurality of patterns and a plurality of index values, wherein the first frequency domain resource corresponds to the plurality of index values, or The pattern information is used to indicate a mapping relationship between multiple patterns and multiple index values, and a corresponding relationship between the first frequency domain resources and the multiple index values. Each pattern is used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resources or the number of DMRS CDM groups not used for carrying data; A first index value is determined according to the pattern information and the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resources or the number of DMRS CDM groups not used to carry data, and the first indication information includes the first index value.

17. The method according to claim 15, characterized in that A ratio of the number of resource block groups included in the first frequency domain resources to the number of resource block groups included in the third frequency domain resources and the number of resource blocks included in the resource block groups satisfy a first corresponding relationship.

18. The method according to claim 11, characterized in that The method further comprises: Sending third information to the terminal device, where the third information is used to indicate the first quantity or the second quantity.

19. A communication device, characterized in that: include: processor and memory; The memory is used to store computer programs; The processor is configured to execute the computer program stored in the memory, so as to enable the communication device to perform the method according to any one of claims 1 to 9, or the method according to any one of claims 10 to 18.

20. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, which, when executed on a computer, enables the computer to execute the method according to any one of claims 1 to 9 or the method according to any one of claims 10 to 18.

21. A chip system, characterized in that: The method comprises: a processor configured to call and run a computer program from a memory, so that a communication device equipped with the chip system executes the method according to any one of claims 1 to 9, or executes the method according to any one of claims 10 to 18.

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