CN115484675A - Resource allocation method and device - Google Patents

Abstract

The present application provides a resource configuration method and device, the method comprising: a network device indicates a first frequency domain resource to a terminal device, the terminal device receives a physical downlink shared channel based on the first frequency domain resource, and the first frequency domain resource It includes two parts of sub-frequency domain resources, and the numbers of pre-demodulation reference signal DMRS symbols corresponding to the two parts of sub-frequency domain resources are different, or, the two parts of sub-frequency domain resources respectively correspond to DMRS code divisions not used to carry data The number of multiplexed CDM groups is different. The method and device provided in this application realize flexible resource configuration in the frequency domain by configuring the number of different pre-DMRS symbols/or the number of DMRS CDM groups not used to carry data on the scheduled frequency domain resources according to communication needs, Thereby saving transmission resources.

Description

Resource allocation method and device

technical field

The present application relates to the communication field, and, more specifically, relates to a resource configuration method and device.

Background technique

Currently, when a network device communicates with a terminal device, all scheduling resource blocks of the terminal device have the same demodulation reference signal (de-modulation reference signal, DMRS) configuration, where the DMRS configuration includes the number of pre-DMRS symbols or is not used to carry data The number of (code division multiplexing, CDM) groups, etc. For the frequency selective fading scenario, the terminal device performs space division multiplexing with other terminal devices on different subbands (one or more resource blocks (resource block, RB)), and the terminal devices on different subbands will appear Different numbers result in different numbers of spatial layers transmitted simultaneously on different subbands. If the DMRS configuration of all scheduling resource blocks of the terminal device is the same, the network device will according to 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 to carry data, The number of pre-DMRS symbols and the number of DMRS CDM groups not used to carry data are uniformly configured for all subbands. It will occupy resources for data transmission, resulting in a waste of transmission resources and affecting communication efficiency.

Contents of the invention

The present application provides a method and device for resource allocation, by configuring different numbers of pre-DMRS symbols or the number of DMRS CDM groups not used to carry data on the scheduled frequency domain resources according to communication needs, so as to realize flexible allocation in the frequency domain. Resource allocation, thereby saving transmission resources.

In a first aspect, a resource configuration method is provided, including: receiving first indication information from a network device, where the first indication information is used to indicate a first frequency domain resource; based on the first indication information, in the first frequency domain A physical downlink shared channel (physical downlink shared channel, PDSCH) is received on a resource, where 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 Frequency domain resources, 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 that are not used to carry data corresponding to the second sub-frequency domain resource. Number of CDM groups.

The above scheme implements flexible DMRS resource allocation in the frequency domain by configuring different numbers of pre-DMRS symbols on the scheduled frequency domain resources according to communication needs, reduces resource overhead for DMRS transmission, and improves resource utilization.

With reference to 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 .

With reference to the first aspect, in some implementations of the first aspect, the second sub-frequency domain resource is a frequency domain resource in the first frequency domain resource other than the first sub-frequency domain resource.

With reference to the first aspect, in some implementation manners of the first aspect, the method further includes: receiving second indication information, where the second indication information is used to indicate that in the first frequency domain resource other than the second frequency domain resource A frequency domain resource belonging to the first sub-frequency domain resource among other frequency domain resources, wherein the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.

In the above solution, in the frequency domain resource carrying 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 resource. Compared with the case where there is no predetermined frequency domain resource, The resources that need to be indicated are reduced, and the size of the signaling that needs to be used can also be reduced, which can reduce signaling overhead and save resources.

With reference to the first aspect, in some implementation manners of the first aspect, the method further includes: receiving second indication information, where the second indication information is used to indicate that the first frequency domain resource other than the second frequency domain resource One or more resource block groups, where the one or more resource block groups belong to the first sub-frequency domain resource, wherein the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.

In the above solution, in the frequency domain resource carrying 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 resource. Compared with the case where there is no predetermined frequency domain resource, The resources that need to be indicated are reduced, and the size of the signaling that needs to be used can also be reduced, which can reduce signaling overhead and save resources.

With reference to the first aspect, in some implementation manners of the first aspect, the first indication information includes first sub-indication information and second sub-indication information, and 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, except for the second frequency domain resource Other resource block groups other than 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-frequency domain resource 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 DMR CDM groups that are not used to carry data, where the pre-DMRS symbols in the second frequency domain resource The number of symbols or the number of DMRS CDM groups not used to carry data is the first number of resource block groups belonging to the first sub-frequency domain resource, and the number of preceding DMRS symbols or DMRS CDM groups not used to carry data in the second frequency domain resource The resource block groups whose quantity is the second quantity belong to the second sub-frequency domain resource.

With reference to the first aspect, in some implementation manners of the first aspect, 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 resources included in the third frequency domain resource The number of blocks is not M, and the M belongs to a preset first number set; the number of resource blocks included in the third frequency domain resource is N, and the N belongs to a preset second number set; the third frequency domain resource The relationship between the number of resource blocks included and the number of resource blocks included in the first resource block group satisfies a first preset condition.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: acquiring pattern information, where the pattern information is used to indicate the mapping relationship between multiple patterns and multiple index values, wherein the first The frequency domain resource corresponds to the multiple index values, or the pattern information is used to indicate the mapping relationship between the multiple patterns and the multiple index values, and the correspondence between the first frequency domain resource and the multiple index values relationship, 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 , according to the pattern corresponding to the first index value, 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.

With reference to the first aspect, in some implementation manners of the first aspect, the ratio of the number of resource block groups included in the first frequency domain resource to the number of resource block groups included in the third frequency domain resource and the resource block group included The number of resource blocks satisfies the first correspondence relationship, and the third frequency domain resource includes the first frequency domain resource.

With reference to the first aspect, in some implementation manners of the first aspect, the ratio of the number of resource block groups included in the first frequency domain resource to the number of resource block groups included in the third frequency domain resource and the resource block group included The number of resource blocks in the resource block group satisfies the first correspondence, the third frequency domain resource includes the first frequency domain resource, and the number of resource blocks included in the resource block group is determined according to the first correspondence.

In the above solution, according to the actual resource scheduling situation, under the condition that the length of the instruction information for scheduling resources remains unchanged, the granularity of the instruction is dynamically changed, that is, the size of the resource block group is dynamically determined, so that instructions and scheduling with a smaller granularity can be realized, saving The overhead of transmitting DMRS is reduced, and at the same time, the number of filling bits in the indication information is reduced, further reducing waste of resources.

With reference to the first aspect, in some implementation manners 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.

With reference to the first aspect, in some implementations of the first aspect, the number of resource block groups included in the second frequency domain resource is determined based on the number of resource block groups included in the first frequency domain resource.

With reference to the first aspect, in some implementations of the first aspect, the number of resource block groups included in the second frequency domain resource is less than or equal to the second threshold.

With reference to the first aspect, in some 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 at least one first sub-frequency domain resource corresponds to at least one second DMRS port. The number of a 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 the third threshold or any index included in the one or more second DMRS ports When the index of a DMRS port 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 all the DMRS ports included in the at least one first DMRS port When the index and the index of all DMRS ports included in the at least one second DMRS port are less than or equal to the third threshold, the 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 ; 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 Indicated by fourth indication information, the fourth indication information is different from the third indication information.

In the above solution, for the frequency domain resources that carry the transmission signals of the network equipment and the terminal equipment, the two frequency domain resources configured by the network equipment with different numbers of pre-DMRS symbols are respectively configured with DMRS ports, which avoids the waste of DMRS port resources and improves resource utilization. Scheduling flexibility.

In a second aspect, a signal transmission method is provided, including: 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 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, and the first number is the first sub-frequency domain resource The number of corresponding pre-demodulation reference signal DMRS symbols, 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 unused sub-frequency domain resources corresponding to the first sub-frequency domain resource The second number is the number of DMRS CDM groups not used to carry data corresponding to the second sub-frequency domain resources.

In the above solution, for the scheduled frequency domain resources, by configuring different numbers of pre-DMRS symbols for different resources according to communication needs, flexible DMRS resource configuration in the frequency domain is realized, and the overhead for transmitting DMRS is reduced.

With reference to the second aspect, in some 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 that the first frequency domain resource in the first frequency domain resource frequency domain resources.

With reference to the second aspect, in some implementations of the second aspect, the second sub-frequency domain resource is a frequency domain resource in the first frequency domain resource other than the first sub-frequency domain resource.

With reference to the second aspect, in some implementation manners of the second aspect, the method further includes: sending second indication information to the terminal device, where the second indication information is used to indicate that the first frequency domain resources except the second frequency A frequency domain resource belonging to the first sub-frequency domain resource among other frequency domain resources other than the domain resource, wherein the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.

In the above solution, in the frequency domain resources that bear 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 signaling overhead and saves resources.

With reference to the second aspect, in some implementation manners of the second aspect, the first indication information includes first sub-indication information and second sub-indication information, where 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 the second frequency domain resource Other resource block groups in 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 of the second frequency domain resources a second resource block group, 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 Belonging 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 to carry data, Wherein, in the second frequency domain resource, the number of preamble DMRS symbols or the number of DMRSCDM groups not used to carry data is the first number of resource block groups belonging to the first sub-frequency domain resource, and the number of preamble DMRS symbols in the second frequency domain resource is Resource block groups whose number of DMRS symbols or the number of DMRS CDM groups not used to carry data is the second number belong to the second sub-frequency domain resource.

With reference to the second aspect, in some implementations of the second aspect, 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 resources included in the third frequency domain resource The number of blocks is not M, and the M belongs to a preset first number set; the number of resource blocks included in the third frequency domain resource is N, and the N belongs to a preset second number set; the third frequency domain resource The relationship between the number of resource blocks included and the number of resource blocks included in the first resource block group satisfies a first preset condition.

In the above solution, by constraining the first frequency domain resources and/or the third frequency domain resources to meet certain conditions, the first indication information can be used to indicate predetermined frequency domain resources among the scheduled frequency domain resources, further reducing signaling overhead .

With reference to the second aspect, in some implementations of the second aspect, the method further includes: acquiring pattern information, where the pattern information is used to indicate the mapping relationship between multiple patterns and multiple index values, wherein the first The frequency domain resource corresponds to the multiple index values, or the pattern information is used to indicate the mapping relationship between the multiple patterns and the multiple index values, and the correspondence between the first frequency domain resource and the multiple index values relationship, 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; according to the pattern information, and the second frequency domain resource The number of pre-DMRS symbols corresponding to each resource block group in the domain resource or the number of DMRSCDM groups not used to carry data determines a first index value, and the first indication information includes the first index value.

With reference to the second aspect, in some implementations of the second aspect, the ratio of the number of resource block groups included in the first frequency domain resource to the number of resource block groups included in the third frequency domain resource is equal to the ratio of the number of resource block groups included in the resource block group The number of resource blocks satisfies the first correspondence.

With reference to the first aspect, in some implementation manners of the first aspect, the ratio of the number of resource block groups included in the first frequency domain resource to the number of resource block groups included in the third frequency domain resource and the resource block group included The number of resource blocks in the resource block group satisfies the first correspondence, the third frequency domain resource includes the first frequency domain resource, and the number of resource blocks included in the resource block group is determined according to the first correspondence.

In the above solution, according to the actual resource scheduling situation, under the condition that the length of the instruction information for scheduling resources remains unchanged, the granularity of the instruction is dynamically changed, that is, the size of the resource block group is dynamically determined, so that instructions and scheduling with a smaller granularity can be realized, saving The overhead of transmitting DMRS is reduced, and at the same time, the number of filling bits in the indication information is reduced, further reducing waste of resources.

With reference to the second aspect, in some implementation manners of the second aspect, the method further includes: the network device sending third information to the terminal device, where the third information is used to indicate the first quantity or the second quantity.

With reference to the second aspect, in some implementations of the second aspect, the number of resource block groups included in the second frequency domain resource is determined based on the number of resource block groups included in the first frequency domain resource.

With reference to the second aspect, in some implementations of the second aspect, the number of resource block groups included in the second frequency domain resource is less than or equal to the second threshold.

With reference to the second aspect, in some 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 at least one first sub-frequency domain resource corresponds to at least one second DMRS port. The number of a 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 the third threshold or any index included in the one or more second DMRS ports When the index of a DMRS port 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 all the DMRS ports included in the at least one first DMRS port When the index and the index of all DMRS ports included in the at least one second DMRS port are less than or equal to the third threshold, the 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 ; 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 Indicated by fourth indication information, the fourth indication information is different from the third indication information.

In the above scheme, DMRS ports are respectively configured for two parts of frequency domain resources with different numbers of pre-DMRS symbols configured in the frequency domain resources carrying network equipment and terminal equipment transmission signals, which avoids waste of DMRS port resources and improves resource scheduling efficiency. flexibility.

In a third aspect, a communication device is provided, which is used to realize the functions of the terminal in the method provided in the first aspect above. The functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware. The hardware or software includes one or more modules corresponding to the above functions.

With reference to the third aspect, in some implementation manners of the third aspect, the communication apparatus includes: a transceiver module, configured 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 is further configured to receive a physical downlink shared channel PDSCH on a first frequency domain resource based on the first indication information, where the first number of the PDSCH is different from the second number of the PDSCH, and the first frequency domain resource Including 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 symbols of the second sub-frequency domain The number of pre-DMRS symbols corresponding to the domain resources, or the first number is the number of DMRS code division multiplexing CDM groups that are not used to carry data corresponding to the first sub-frequency domain resources, and the second number is the number of the second sub-frequency domain resources Number of DMRS CDM groups not used to carry data corresponding to frequency domain resources.

In the above solution, 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 realized, and the overhead for transmitting DMRS is reduced.

With reference to the third aspect, in some implementation manners of the third aspect, the transceiver module is further configured to receive second indication information, where the second indication information is used to indicate that the first frequency sub-frequency in the first frequency domain resource Domain resources.

With reference to the third aspect, in some implementations of the third aspect, the second sub-frequency domain resource is a frequency domain resource in the first frequency domain resource other than the first sub-frequency domain resource.

With reference to the third aspect, in some implementation manners of the third aspect, the transceiver module is further configured to receive second indication information, where the second indication information is used to indicate that the first frequency domain resources except the second frequency domain resources A frequency domain resource belonging to the first sub-frequency domain resource among other frequency domain resources, wherein the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.

With reference to the third aspect, in some implementation manners of the third aspect, the first indication information includes first sub-indication information and second sub-indication information, where 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, except for the second frequency domain resource Other resource block groups other than 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-frequency domain resource 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 DMR CDM groups that are not used to carry data, where the pre-DMRS symbols in the second frequency domain resource The number of symbols or the number of DMRS CDM groups not used to carry data is the first number of resource block groups belonging to the first sub-frequency domain resource, and the number of preceding DMRS symbols or DMRS CDM groups not used to carry data in the second frequency domain resource The resource block groups whose quantity is the second quantity belong to the second sub-frequency domain resources.

With reference to the third aspect, in some implementation manners of the third aspect, 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 resources included in the third frequency domain resource The number of blocks is not M, and the M belongs to a preset first number set; the number of resource blocks included in the third frequency domain resource is N, and the N belongs to a preset second number set; the third frequency domain resource The relationship between the number of resource blocks included and the number of resource blocks included in the first resource block group satisfies a first preset condition.

With reference to the third aspect, in some implementation manners of the third aspect, the device further includes: a processing module configured to acquire pattern information, where 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 the mapping relationship between multiple patterns and multiple index values, and the first frequency domain resource and the multiple index values Correspondence between 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 Including the first index value, the processing module is further configured to determine, 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 symbols not used to carry data Number of DMRSCDM groups.

With reference to the third aspect, in some implementation manners of the third aspect, the ratio of the number of resource block groups included in the first frequency domain resource to the number of resource block groups included in the third frequency domain resource and the resource block group included The number of resource blocks satisfies the first correspondence relationship, and the third frequency domain resource includes the first frequency domain resource.

With reference to the third aspect, in some implementation manners of the third aspect, the transceiver module is further configured to receive third indication information, where the third indication information is used to indicate the first quantity or the second quantity.

In a fourth aspect, a communication device is provided, including: a transceiver module, configured to send first indication information, where the first indication information is used to indicate a first frequency domain resource; The physical downlink shared channel PDSCH is sent on the 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, and the 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 CDM groups not used to carry data corresponding to the first sub-frequency domain resource, and the second number is the number of DMRS CDM groups not used to carry data corresponding to the second sub-frequency domain resource.

In the above solution, 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 realized, and the overhead for transmitting DMRS is reduced.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the transceiver module is further configured to send second indication information to the terminal device, where the second information is used to indicate that the first frequency domain resource in the first frequency domain resource A sub-frequency domain resource.

With reference to the fourth aspect, in some implementations of the fourth aspect, the second sub-frequency domain resource is a frequency domain resource in the first frequency domain resource other than the first sub-frequency domain resource.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the transceiver module is further configured to send second indication information to the terminal device, where the second indication information is used to indicate that the first frequency domain resources except the first A frequency domain resource belonging to the first sub-frequency domain resource among other frequency domain resources other than the second frequency domain resource, wherein the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the first indication information includes first sub-indication information and second sub-indication information, where 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 the second frequency domain resource Other resource block groups in 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 of the second frequency domain resources a second resource block group, 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 Belonging 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 to carry data, Wherein, in the second frequency domain resource, the number of preamble DMRS symbols or the number of DMRSCDM groups not used to carry data is the first number of resource block groups belonging to the first sub-frequency domain resource, and the number of preamble DMRS symbols in the second frequency domain resource is Resource block groups whose number of DMRS symbols or the number of DMRS CDM groups not used to carry data is the second number belong to the second sub-frequency domain resources.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, 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 resources included in the third frequency domain resource The number of blocks is not M, and the M belongs to a preset first number set; the number of resource blocks included in the third frequency domain resource is N, and the N belongs to a preset second number set; the third frequency domain resource The relationship between the number of resource blocks included and the number of resource blocks included in the first resource block group satisfies a first preset condition.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the device further includes: a processing module configured to acquire pattern information, where 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 the mapping relationship between multiple patterns and multiple index values, and the first frequency domain resource and the multiple index values Correspondence between 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 processing module is also It is used to determine the first index value according to the pattern information, 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, and the first indication information includes The first index value.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the ratio of the number of resource block groups included in the first frequency domain resource to the number of resource block groups included in the third frequency domain resource is equal to the ratio of the number of resource block groups included in the resource block group The number of resource blocks satisfies the first correspondence.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the transceiver module is further configured to send third information to the terminal device, where the third information is used to indicate the first quantity or the second quantity.

In a fifth aspect, a communication device is provided, including: 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 first Aspect or the communication method of the second aspect.

According to the sixth aspect, a computer-readable storage medium is provided. A computer program is stored on the computer-readable storage medium. When the computer program is run on a computer, the computer is made to execute the communication method of the first aspect or the second aspect. .

In a seventh aspect, a chip system is provided, including: a processor, configured to call and run a computer program from a memory, so that a communication device installed with the chip system executes the communication method of the first aspect or the second aspect.

In an eighth aspect, the present application provides a computer program product, the computer program product includes a computer program, and when the computer program runs in parallel, the method performed by the terminal device in the above first aspect is executed, or the above first The method performed by the network device of the two aspects is performed.

Description of drawings

Fig. 1 shows a schematic diagram of an example of a DMRS pattern in a 5G system.

Fig. 2 shows a schematic diagram of two time slots configured with different numbers of preamble DMRS symbols.

Fig. 3 shows a schematic diagram of configuring two time slots with different numbers of DMRS CDM groups not used to carry data.

Figure 4 shows the waste of resources caused by configuring the same number of pre-DMRS symbols in the frequency domain.

FIG. 5 shows the waste of resources caused by configuring the same number of DMRS CDM groups not used to carry data in the frequency domain.

FIG. 6 shows a schematic interaction diagram of a resource configuration method 600 provided by the present application.

Fig. 7 shows a schematic diagram of an example of a first frequency domain resource.

Fig. 8 shows a schematic diagram of another example of the first frequency domain resource.

Fig. 9 is a schematic block diagram of a communication device for sending information provided by an embodiment of the present application.

FIG. 10 is a schematic diagram of an information sending device 20 provided by an embodiment of the present application.

detailed description

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

The terms "component", "module", "system" and the like are used in this specification to refer to a computer-related entity, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be components. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. A component may, for example, be based on a signal having one or more packets of data (e.g., data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet via a signal interacting with other systems). Communicate through local and/or remote processes.

1) A terminal, also called a user equipment (UE), a mobile station (MS), or a mobile terminal (MT), is a device that provides voice/data connectivity to users A device, for example, a handheld device with a wireless connection function, or a vehicle-mounted device, and the like. At present, examples of some terminals are: mobile phone (mobile phone), tablet computer, notebook computer, palmtop computer, mobile internet device (mobile internet device, MID), wearable device, virtual reality (virtual reality, VR) device, augmented reality ( augmented reality (AR) equipment, wireless terminals in industrial control, wireless terminals in selfdriving, wireless terminals in remote medical surgery, wireless terminals in smart grid , a wireless terminal in transportation safety, a wireless terminal in a smart city, or a wireless terminal in a smart home, etc.

2). The network device is a device in the wireless network, for example, a radio access network (radio access network, RAN) node that connects the terminal to the wireless network. Currently, examples of some RAN nodes are: gNB, transmission reception point (transmission reception point, TRP), evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), node B (Node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, homeevolved NodeB, or home Node B, HNB), base band unit (base band unit, BBU ), or a wireless fidelity (wireless fidelity, Wifi) access point (access point, AP), etc. In a network structure, the network device may include a centralized unit (centralized unit, CU) node, or a distributed unit (distributed unit, DU) node, or a RAN device including a CU node and a DU node.

The technical solution of the embodiment of the present application can be applied to various communication systems, for example: global system of mobile communication (globalsystem of mobile communication, GSM) system, code division multiple access (code division multiple access, CDMA) system, wideband code division multiple access (wideband code division multiple access (WCDMA) system, general packet radio service (general packet radio service, GPRS), long term evolution (long termevolution, LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (time division duplex, TDD), universal mobile telecommunications system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, 5G system or new radio (new radio, NR), etc.

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

The fixed wireless access (FWA) network based on long term evolution (long term evolution, LTE) and 5G NR (new radio, NR) technology, through indoor or outdoor customer premises equipment (CPE) to the End users are provided with wireless LAN or limited LAN access. CPE can provide end users with various services such as Internet, fixed telephone, TV, and smart home. For the FWA scenario, the downlink communication from the network device to the CPE is usually based on the transmission of large data packets, and the base station needs to schedule more spectrum resources for the CPE to meet its rate requirements. In particular, for indoor FWA scenarios, since there are many obstacles indoors and the multipath effect is serious, there will be strong frequency selective fading of the channel.

In a 5G new radio interface (new radio interface, NR) system and a long term evolution (long term evolution, LTE) system, the multiple access method usually adopts an orthogonal frequency division multiple access (OFDMA) method. The main feature of OFDMA is that the transmission resources are divided into mutually orthogonal time-frequency resource elements (resource elements, REs). are orthogonal to each other, so that the receiving end can separately receive the signal sent on each RE. Considering the fading characteristics of the wireless channel, the signal carried on the RE will be distorted after being transmitted through the channel, and the channel distortion is usually called the channel coefficient. In order to restore the received signal, the receiving end needs to estimate the channel coefficients. The process of obtaining channel information at the receiving end can also be called channel estimation. In the prior art, a channel estimation scheme based on reference signals is usually used, that is, the transmitting end When a known signal is transmitted on a specific RE, the receiving end estimates the channel coefficient based on the received signal and the known signal, and interpolates the channel coefficient on other REs based on the channel coefficient obtained by this estimation, and then the data signal Perform reception demodulation.

In the existing wireless communication system, the base station is equipped with multiple antennas to realize spatial multiplexing transmission using multi-input multi-output (MIMO) technology, that is, multiple data streams are transmitted on the same time-frequency resource, Each data stream is transmitted on an independent spatial layer, and each spatial layer is mapped to a different antenna port for transmission. Considering that the channel coefficients between different antenna ports and 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 coefficient between each antenna port and the terminal, so it is necessary for each Different DMRSs are configured for each antenna port, and the DMRSs corresponding to different antenna ports can be multiplexed by means of time division, frequency division, and code division. Exemplarily, as shown in FIG. 1 , the total number of DMRS ports is 6, and the number of CDM groups is 3. Among them, the horizontal direction represents the time domain, the vertical direction represents the frequency domain, and each small square represents a RE, where DMRS ports 0 and 1 are multiplexed by orthogonal codes, so the REs corresponding to these two ports are also called a code Division multiplexing (code division multiplexing, CDM) group.

1. Subcarrier: In a communication system using orthogonal frequency division multiplexing (OFDM) technology, frequency domain resources are divided into several subresources, and each frequency domain subresource can be called a subcarrier. A subcarrier can also be understood as the minimum granularity of frequency domain resources. Among them, the OFDM technology is a multi-carrier modulation technology.

2. Subcarrier spacing: In a communication system using OFDM technology, the interval value 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, and the subcarrier spacing in the NR system in 5G can be 15kHz, or 30kHz, or 60kHz, or 120kHz, etc.

3. Resource block (resource block, RB): N consecutive subcarriers in the frequency domain may be called a resource block. For example, a resource block in the LTE system includes 12 subcarriers, and a resource block in the NR system in 5G also includes 12 subcarriers. With the evolution of the communication system, the number of subcarriers included in a resource block may also be other values.

4. Time unit: It is a time domain concept or a unit in the time domain. A time unit can be one or more subframes, one or more time slots, or one or more OFDM time symbols. Among them, the 5G NR system For example, the corresponding time slot length is 1 ms, and the time slot length corresponding to 30 kHz subcarrier interval is 0.5 ms. In OFDM, a symbol can also be referred to as a symbol for short, which is the smallest time unit in the time domain of an OFDM system.

5. Time-frequency resource unit: the smallest time-frequency resource granularity in the OFDM system, which is one OFDM symbol in the time domain and one subcarrier in the frequency domain.

6. Subband: one subband includes one or more resource blocks in the frequency domain, or one subband may include one or more resource block groups in the frequency domain. Since each resource block group also includes multiple resource blocks, the size of one subband may be the same as or different from that of one resource block group. When a subband has the same size as a resource block group, the subband can also be understood as a resource block group.

7. Antenna port: In the 5G NR system, the antenna port is a logical port for transmission, and one antenna port includes multiple physical antennas. From the perspective of the receiving end, each antenna port corresponds to an independent wireless channel.

8. Space layer: In the existing wireless communication system, the base station is equipped with multiple antennas to realize spatial multiplexing transmission using MIMO technology, that is, multiple different data streams are transmitted on the same time-frequency resource, and each unrelated Data streams are transmitted on an independent spatial layer, and each spatial layer is mapped to a different antenna port for transmission.

9. Resource block group: one or more resource blocks form a resource block group (resource block group, RBG). In 5G NR, the size of RBG is configured through high-layer parameters. 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 resource block group included in the frequency domain resource. Unit resource block group.

10. Partial bandwidth (bandwidth part, BWP): It can also be called the bandwidth part. In 5G NR, some frequency domain resources in the carrier can be configured for terminal equipment for data transmission, instead of all the frequency domain resources in the carrier.

11. Type0 type resource allocation and type1 type resource allocation

The downlink data channel supports two types of frequency domain resource allocation: type 0 and type 1. Among them, the type 0 type is discontinuous frequency domain resource allocation, and the type 1 type is continuous frequency domain resource allocation. In order to support the flexibility of scheduling the location and quantity of frequency-domain resources, downlink control information (DCI) can dynamically indicate the type of frequency-domain resource allocation used for scheduled PDSCH transmission (when the parameter resourceAllocation 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 by the PDSCH transmission scheduled by the current DCI. In addition, the frequency domain resource allocation used by the PDSCH can also be directly determined through the high-level signaling parameter resourceAllocation.

Specifically, the type 0 type indicates the resource block groups allocated to the PDSCH in the BWP through a bitmap or a bitmap, and the type 1 type indicates resource blocks with consecutive numbers allocated to the PDSCH in the BWP through the RIV. When using interleaved mapping, resource blocks can be understood as consecutively numbered virtual resource blocks. The RIV is used to indicate the starting resource block number RB _start allocated to the UE PDSCH and the length L _RBs of the allocated continuous resource blocks. In the existing 3GPP standard TS 38.214, the calculation formula of RIV is as follows:

那么

if

So

otherwise,

12. DMRS: The demodulation reference signal is a reference signal used to restore the received signal. DMRS is a signal known to both the sending end and the receiving end. The sending end transmits the DMRS and data to the receiving end through the same port and wireless channel , the receiving end obtains the channel coefficient according to the DMRS in the received signal, and demodulates and decodes the received signal according to the channel coefficient to obtain the transmitted data. In the 5G NR system, considering that the channel coefficients from different antenna ports to terminals are different, 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. Therefore, different DMRSs need to be configured for each antenna port, and the DMRSs corresponding to different antenna ports can be multiplexed by means of time division, frequency division, and code division.

The DMRS includes a pre-DMRS and an additional DMRS, and the pre-DMRS is usually configured in front of a physical downlink shared channel (PDSCH) in a time slot. Currently, a 1-symbol pre-DMRS or a 2-symbol pre-DMRS can be configured in the time domain. Among them, the 2-symbol pre-DMRS can support more DMRS ports to transmit more spatial layers. The 5G NR system configures the maximum number of pre-symbols of DMRS through the high-level parameter maxlength. maxlength can be 1 or 2. When maxlength is configured as 1, it means that the pre-DMRS occupies at most 1 symbol. When maxLength is 2, it means that the pre-DMRS occupies the most Takes 2 symbols. Among them, when maxlength is configured as 2, the network device dynamically indicates the number of symbols occupied by the pre-DMRS of each time slot through the antenna port field in the downlink control information (DCI), that is, the network device passes the antenna port The "number of front-load symbols" indicated by the field determines the number of symbols occupied by the front-load DMRS. Exemplarily, Fig. 2 shows two time slots configured with different numbers of pre-DMRS symbols. As shown in Figure 2, at time slot 1, due to the high number of spatial layers, the DCI indicates time slot 1, and 2-symbol pre-DMRS is configured, and at time slot 2, due to the low number of spatial layers, the DCI indicates time slot 2 Configure 1-symbol pre-DMRS.

NR supports two DMRS pilot types, DMRS Type1 and DMRS Type2. DMRS Type1 has two CDM groups. When single-symbol DMRS is used, it supports up to 4 DMRS ports, and each CDM group supports 2 DMRS ports multiplexing through frequency domain code division multiplexing; when double-symbol For DMRS, it supports up to 8 DMRS ports, and each CDM group supports multiplexing of 4 DMRS ports through time domain and frequency domain code division multiplexing. There are 3 CDM groups in DMRS Type 2. When single-symbol DMRS is used, it supports up to 6 DMRS ports. Each CDM group supports multiplexing of 2 DMRS ports through frequency domain code division multiplexing; when double-symbol DMRS is used For DMRS, it supports up to 12 DMRS ports, and each CDM group supports multiplexing of 4 DMRS ports through time domain and frequency domain code division multiplexing.

At the same time, in the 5G NR system, the CDM group that is not used to transmit DMRS can be used to transmit data signals. Therefore, the network device will also use the "DMRS CDM group that is not used to carry data" indicated by the "antenna port" field in DCI Quantity" to inform the UE which DMRS ports in the CDM group are used by other users. In this way, the terminal can avoid REs that map its own and other UE reference signals during data mapping. When the indicated number of DMRS CDM groups not used to carry data is 1, it indicates that only CDM group 0 is used to carry DMRS, and REs corresponding to other CDM groups are used to transmit data. When the number of DMRS CDM groups not used to carry data is 2, it indicates that only CDM groups 0 and 1 are used to carry DMRS, and REs corresponding to other CDM groups are used to transmit data. When the DMRS CDM group not used to bear data is 3, it indicates that CDM groups 0, 1, and 2 are used to bear DMRS. Exemplarily, Fig. 3 shows two time slots configured with different numbers of DMRS CDM groups not used to carry data. As shown in Figure 3, at time slot 1, the DCI indicates that UE0 has 2 CDM groups that are not used for data transmission, that is, CDM groups 0 and 1, CDM group 0 is used to transmit DMRS of UE0, and CDM group 1 is used for transmission For the DMRS of other users (UE1), at time slot 2, the DCI indicates that UE0 has one CDM group that is not used for data transmission, that is, CDM group 0, and CDM group 0 transmits the DMRS of UE0.

It should be understood that the number of DMRS code division multiplexing CDM groups not used to bear data may also be understood as the number of CDM groups used to bear DMRS. In the NR standard, the resources that can be used for Type 1 DMRS can be divided into 2 CDM groups, and the resources that can be used to carry Type 2 DMRS can be divided into 3 CDM groups. Through the DMRS CDM group that is not used to carry data The CDM group used to carry DMRS and the CDM group used to carry data can be determined. For example, taking the Type 2 DMRS as an example, the resources capable of carrying DMRS are divided into 3 CDM groups, that is, CDM groups 0, 1 and 2. When the number of CDMs not used to carry data is 3, that is, only CDM groups 0, 1 and 2 are used to carry DMRS, and any CDM group is not used to carry data; when the number of CDMs not used to carry data is 2, that is, only CDM groups 0 and 1 are used to carry DMRS, and CDM group 2 is used to carry data.

4 and FIG. 5 , the current DMRS configuration used in the communication between the network device and the terminal device will be introduced below.

At present, when the network device communicates with the terminal device, the demodulation reference signal DMRS configuration of all scheduling resource blocks of the terminal device is the same, where the DMRS configuration 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 a resource block allocated to the scheduled UE for data transmission. For the scenario of frequency selective fading, when subband pairing is used, the terminal equipment performs space division multiplexing with other terminal equipment on different subbands (one or more RBs), and the terminal equipment on different subbands will appear Different numbers result in different numbers of spatial layers transmitted simultaneously on different subbands.

If the current DMRS configuration method is used, the network device will uniformly configure the preamble symbols of all subbands according to the number of preamble DMRS symbols required for the subband with the largest number of transmission space layers and the number of DMRS CDM groups that are not used to carry data. Setting the number of DMRS symbols and the number of DMRS CDM groups that are not used to carry data results in a waste of transmission resources for subbands in which the number of transmission space layers is small.

Exemplarily, Fig. 4 shows resource waste caused by configuring the same number of preamble DMRS symbols in the frequency domain. As shown in Figure 4, there are a total of 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 space division multiplexing in units of subbands, the 8 subbands There are 7 corresponding UEs, numbered from UE 0 to UE 6. Assuming that each UE transmits data of at most 1 spatial layer on each subband, as shown in Figure 4, taking subband 7 as an example, UE0 to UE6 transmit data of 1 spatial layer on subband 7, and on subband 7 There are 7 spatial layers (S402), and taking subband 3 as an example, UE0, UE1, and UE4 all transmit data of 1 spatial layer on subband 3, and there are only 3 spatial layers on subband 3 (S401). It can be seen from Figure 4 that the subband with the largest number of spatial layers is subband 7, and the network device configures a pre-DMRS of 2 symbols according to the number of spatial layers on subband 7. Taking the configuration of type1 DMRS as an example, assuming that the number of CDM groups not used for data transmission is configured as 3, for subband 3, only 1 symbol of pre-DMRS can be configured to meet the transmission requirements. When DMRS is used, transmission resources are wasted.

It should be noted that the "symbol" mentioned in this application can be understood as an OFDM symbol.

Exemplarily, FIG. 5 shows resource waste caused by configuring the same number of DMRS CDM groups not used to carry data in the frequency domain. As shown in Figure 5, there are a total of 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 space division multiplexing in units of subbands, the 8 subbands There are 7 corresponding UEs, numbered UE0 to 6. Assume that each UE transmits data of at most 1 spatial layer on each subband, as shown in Figure 5, taking subband 7 as an example, UE0 to UE6 transmit data of 1 spatial layer on subband 7, and on subband 7 There are 7 spatial layers (S502), and taking subband 3 as an example, UE0, UE1, and UE4 all transmit data of 1 spatial layer on subband 3, and there are only 3 spatial layers on subband 3 (S501). It can be seen from Figure 5 that the subband with the largest number of spatial layers is subband 7, and the network device configures two CDM groups that are not used for data transmission according to the number of spatial layers on subband 7. For subband 3, only one CDM group that is not used for data transmission can meet the transmission requirements. When two CDM groups are not used for data transmission, the transmission resources are wasted.

Therefore, the present application hopes to propose a resource allocation method to realize flexible resource allocation of the number of pre-DMRS symbols in the frequency domain and/or the number of DMRS CDM groups not used to bear data, thereby saving transmission resources.

The resource allocation method of the present application will be described in detail below with reference to FIG. 6 to FIG. 8 .

FIG. 6 shows a schematic interaction diagram of a resource configuration method 600 provided by the present application. Method 600 may include the following steps.

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 the first frequency domain resource.

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 bear the downlink signal sent by the network device to the terminal device. Exemplarily, the first frequency domain resource belongs to BWP. Exemplarily, the network device indicates the first frequency domain resource to the terminal device through the "frequency domain resource allocation" field in the DCI.

S602. The network device sends the PDSCH on the first frequency domain resource, and correspondingly, the terminal device receives the 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.

(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

(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 CDM groups that are not used to carry data corresponding to the second sub-frequency domain resources the number of DMRS CDM groups, or

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

It should be understood that when the first number is different from the second number, it can be understood that the number of pre-demodulation reference signal DMRS symbols corresponding to the first sub-frequency domain resource is the same as the number of pre-DMRS symbols corresponding to the second sub-frequency domain resource The numbers are different, and the number of DMRSCDM groups not used to bear data corresponding to the first sub-frequency domain resource is different from the number of DMRSCDM groups not used to bear data corresponding to the second sub-frequency domain resource.

It should be noted that the present application uses the above (1) or (2) as an example to describe the method 600, but the present application does not limit this. The first possible implementation manner of the method 600 is described by taking the above (1) as an example.

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 realized, and the overhead for transmitting DMRS is reduced.

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

Exemplarily, the second sub-frequency domain resource is a frequency domain resource in the first frequency domain resource except the first sub-frequency domain resource. The terminal device may 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.

The following takes the two resource allocation manners as examples to introduce in detail how the second indication information indicates the first sub-frequency domain resource.

Mode 1, the second indication information indicates the first sub-frequency domain resource in the first frequency domain resource in the form of a bitmap (for example, type0 resource allocation mode). Specifically, the second indication information indicates that one or more first resource block groups in the first frequency domain resources are the first sub-frequency domain resources. The first resource block group here includes one or more RBs.

Exemplarily, Fig. 7 shows a schematic diagram of the first frequency domain resource. As shown in FIG. 7, the first frequency domain resource includes 8 RBs, RB0 to RB7, the size (size) of a first resource block group is 2 RBs, and the first frequency domain resource includes 4 first resource block groups, The first resource block group 0 to the 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 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 can determine according to the second indication information Find the location of the first sub-frequency domain resource.

Mode 2, when the terminal device adopts a continuous resource allocation mode (for example, a type1 type resource allocation mode), the second indication information indicates one or more consecutive resources in the first frequency domain resource through a resource indicator value (RIV). A first resource block group. The first resource block group here includes one or more RBs.

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 according to the starting first resource corresponding to RIV2 The sequence number of the block group (RB _start ) and the number of consecutively allocated first resource block groups (L _RBs ) determine the position of the first sub-frequency domain resource.

It should be understood that the above-mentioned first resource block group may be understood as an RBG configured by a high-level parameter in 5G NR, or may be understood as another form of resource block group. Taking four possible ways as examples below, the implementation way of determining the size (size) of the first resource block group will be introduced in detail. Among them, possible mode 3 can be applied to the above-mentioned mode 1 and mode 2, and possible modes 1, 2 and 4 can only be applied to the above-mentioned mode 1.

Possible manner 1, the size of the first resource block group is the size of the RBG configured by the high layer 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 high layer parameter (rbg-size).

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.

When implementing this method, the definition of the first resource block group continues to use the existing RBG, and compared with other possible methods, the modification of the existing protocol is minimal.

In a second possible manner, the size of the first resource block group dynamically changes with the number of RBGs included in the first frequency domain resource.

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

Or, the ratio of the number of resource block groups included in the first frequency-domain resource to the number of resource block groups included in the third frequency-domain resource and the number of resource blocks included in the resource block group satisfy the first corresponding relationship, so The third frequency domain resource includes the first frequency domain resource, and the size of the first resource block group is determined according to the first correspondence. Then, the ratio of the size of the first resource block group to the number of RBGs included in the first frequency domain resource and the number of RBGs included in the BWP satisfies the first corresponding relationship, or, the size of the first resource block group is based on the first frequency domain The ratio of the number of RBGs included in the resource to the number of RBGs included in the BWP is determined.

Exemplarily, the third frequency domain resource is BWP or active bandwidth part or bandwidth.

或者第一频域资源中包括的RBG的数量与BWP包括的RBG的数量的比值大于

时，第一资源块组的大小为高层参数rbg-size指示的RBG的大小。(2)当第一频域 资源中包括的RBG的数量小于BWP包括的RBG的数量的

或者第一频域资源包括的 RBG的数量与BWP包括的RBG的数量的比值小于或等于

时，第一资源块组的大小为 高层参数rbg-size指示的RBG的大小的

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 size of the first resource block group is the size of the RBG indicated by the high layer 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

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

其中，

为第一资源块组的大小，

为高层参数rbg-size指示的RBG大小，

为第一频域资源中包括的RBG的数量，

为BWP中包括的RBG的数量。示例性地，表1示出了第一资源块组的大小随第一 频域资源中包括的RBG的数量动态变化的一例。由表1可见，当第一频域资源中包括的 RBG的数量大于BWP包括的RBG的数量的

或者第一频域资源中包括的RBG的数量 与BWP包括的RBG的数量的比值大于

时，第一资源块组的大小为高层参数rbg-size 指示的RBG的大小；当第一频域资源包括的RBG的数量小于或等于BWP包括的RBG 的数量的

且大于BWP包括的RBG的数量的

时，第一资源块组的大小为RBG的大小 的

当第一频域资源包括的RBG的数量小于或等于BWP包括的RBG的数量的

时， 第一资源块组的大小为RBG的大小的

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. Exemplarily, Table 1 shows an example in which the size of the first resource block group dynamically changes with the number of RBGs included in the first frequency domain resource. It can be seen from Table 1 that 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 greater than the number of RBGs included in the BWP

When , the size of the first resource block group is the size of 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 the size of the RBG

Table 1

It should be understood that, in order to determine which piece of time-frequency resource the DCI used to indicate itself is on, the terminal device needs to perform blind detection on all available DCI. Blind detection of DCI of the same length requires only one configuration, blind detection of DCI of different lengths requires different configurations, and the number of blind detections is more than that of blind detection of DCI of the same length. Exemplarily, assuming that the length of the DCI that the terminal device can obtain has two situations, one is 4 bits, and the other is 2 bits, then the terminal device needs to use the configuration when the DCI length is 4 to blindly detect the DCI n times, and The DCI needs to be blindly detected n times according to the configuration when the DCI length is 2. Assuming that the length of the DCI that can be obtained by the terminal device is all 4 bits, the terminal device can blindly detect the DCI n times only by using the configuration when the DCI length is 4 bits. Therefore, in order to reduce the number of times the terminal device blindly detects the DCI, the number of candidate values for the length of the DCI should be as small as possible.

In this method, in order to ensure that there are as few candidate values as possible for the length of the DCI, the length of the second indication information should be a fixed value, where the length of the second indication information is the indication information required when scheduling all resource blocks in the BWP length. When the number of actual scheduling resources, that is, the number of RBGs included in the first frequency domain resource is less than the number of RBGs included in the BWP, the second indication information keeps the length of the second indication information constant by filling high bits. In order to avoid too few scheduling resources, it is necessary to fill more bits into the second indication information, thereby causing waste of resources. In this method, according to the actual resource scheduling situation, under the condition that the length of the indication information used for scheduling resources remains unchanged, the indication granularity is dynamically changed, that is, the size of the first resource block group is dynamically determined, and smaller granularity indication and scheduling can be realized. The overhead of transmitting DMRS is saved, and at the same time, the number of filling bits in the indication information is reduced, further reducing waste of resources.

Possible implementation manner three, the size of the first resource block group is related to a coefficient.

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

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

确定的。Taking type0 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 high-level parameters

definite.

当k为大于1的整数时，第一资源块组的大小大于高层参数配置的 RBG的大小，其中，

为第一资源块组的大小，

为RBG的大小。

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 high-level parameter, wherein,

is the size of the first resource block group,

is the size of RBG.

Taking type1 resource allocation as an example, the size of the first resource block group is determined according to the coefficient k.

等于k，其中，

为第一资源块组的大小。The first resource block group consists of k RBs,

is equal to k, where,

is the size of the first resource block group.

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

In this method, 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, reducing the number of second indication information s expenses.

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 .

其中，

为BWP的大小，M 为预定义的第二指示信息的长度。Take resource allocation of type0 as an example,

in,

is the size of the BWP, and M is the length of the predefined second indication information.

或者，

其中，

为第一资源块组的大小，M为预定义的第二指示信息的长度。Take type1 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.

In this method, the size of the first resource block group is dynamically changed 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, reducing The overhead of the second indication information.

In a fourth possible implementation manner, 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 "one coefficient" here may specifically refer to the third possible implementation manner above.

或者第一频域资源中包括 的RBG的数量与BWP包括的RBG的数量的比值大于

时，第一资源块组的大小为高层 参数rbg-size指示的RBG的大小的k倍。(2)当第一频域资源中包括的RBG的数量小 于BWP包括的RBG的数量的

或者第一频域资源包括的RBG的数量与BWP包括的 RBG的数量的比值小于或等于

时，第一资源块组的大小为高层参数rbg-size指示的RBG 的大小的

倍。As an example, when the "one coefficient" is the coefficient k in possible implementation manner 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 k times the size of the RBG indicated by the high layer 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

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.

In this method, according to the actual scheduling resource situation, when the length of the indication information used for scheduling resources remains unchanged, the indication granularity is dynamically changed, that is, the size of the resource block group is dynamically determined, and smaller granularity indication and scheduling can be realized , which saves the overhead of transmitting DMRS, and at the same time reduces the number of padding bits in the indication information, further reducing waste of resources.

其中，

为第一资源块组的大小，

为高层参数rbg-size指示的RBG大小，

为第一频域资源中包括的RBG的数量，

为BWP中包括的RBG的数量。示例性地，表2示出了第一资源块组的大小随第一 频域资源中包括的RBG的数量动态变化的另一例。由表2可见，当第一频域资源中包括 的RBG的数量大于BWP包括的RBG的数量的

或者第一频域资源中包括的RBG的数 量与BWP包括的RBG的数量的比值大于

时，第一资源块组的大小为高层参数rbg-size 指示的RBG的大小的k倍；当第一频域资源包括的RBG的数量小于或等于BWP包括的 RBG的数量的

且大于BWP包括的RBG的数量的

时，第一资源块组的大小为RBG 的大小的

倍；当第一频域资源包括的RBG的数量小于或等于BWP包括的RBG的数量 的

时，第一资源块组的大小为RBG的大小的

倍。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. Exemplarily, Table 2 shows another example where the size of the first resource block group dynamically changes with the number of RBGs included in the first frequency domain resource. It can be seen from Table 2 that 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 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 greater than the number of RBGs included in the BWP

When , the size of the first resource block group is the size of 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 the size of RBG

times.

Table 2

In this method, according to the actual scheduling resource situation, when the length of the indication information used for scheduling resources remains unchanged, the indication granularity is dynamically changed, that is, the size of the resource block group is dynamically determined, and smaller granularity indication and scheduling can be realized , which saves the overhead of transmitting DMRS, and at the same time reduces the number of padding bits in the indication information, further reducing waste of resources.

或者 第一频域资源中包括的RBG的数量与BWP包括的RBG的数量的比值大于

时，第一资 源块组的大小为

(2)当第一频域资源中包括的RBG的数量小于BWP包 括的RBG的数量的

或者第一频域资源包括的RBG的数量与BWP包括的RBG的数量 的比值小于或等于

时，第一资源块组的大小为

As another example, when the "one coefficient" is the length M of the second indication information in 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

In this method, according to the actual scheduling resource situation, when the length of the indication information used for scheduling resources remains unchanged, the indication granularity is dynamically changed, that is, the size of the resource block group is dynamically determined, and smaller granularity indication and scheduling can be realized , which saves the overhead of transmitting DMRS, and at the same time reduces the number of padding bits in the indication information, further reducing waste of resources.

其中，

为第一资源块组 的大小，

为BWP的大小，

为第一频域资源中包括的RBG的数量，

为BWP 中包括的RBG的数量，M为预定义的第二指示信息的长度。As another example,

in,

is the size of the first resource block group,

is the size of the 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.

In this method, according to the actual scheduling resource situation, when the length of the indication information used for scheduling resources remains unchanged, the indication granularity is dynamically changed, that is, the size of the resource block group is dynamically determined, and smaller granularity indication and scheduling can be realized , which saves the overhead of transmitting DMRS, and at the same time reduces the number of padding bits in the indication information, further reducing waste of resources.

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

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 A second quantity is determined. For example, when the first number is 1, the second number is 2, and vice versa.

Optionally, the method 600 further 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 the same as the number of the first DMRS port. The number of at least one second DMRS port is equal; 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 first When the threshold is three, 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; when the index of all DMRS ports included in the at least one first DMRS port and the at least one second When the indexes of all the DMRS ports included in the two DMRS ports 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 includes the same DMRS port; A 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 the fourth indication information, The fourth indication information is different from the third indication information.

The above solution will be described in detail below by taking two possible ways as examples.

Possible manner 1, the third indication information here is used to indicate the number of pre-DMRS symbols, the number of DMRS CDM groups not used to bear data, and at least one first DMRS port and at least one second DMRS port. For example, the number of pre-DMRS symbols indicated by the third indication information, the number of DMRS CDM groups not used to carry data, and at least one first DMRS port may be the first antenna indicated by the antenna port field in 3GPP standard TS 38.212 port configuration.

It should be understood that the at least one first DMRS port or the at least one second DMRS port here may be understood as the DMRS port used when the frequency domain resources corresponding to the first number or the second number indicated by the third indication information are used for DMRS transmission. For example, 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, then at this time the second sub-frequency domain resource uses at least one second DMRS port for DMRS transmission . Or, for example, 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, then at this time the first sub-frequency domain resource uses at least one second DMRS port for DMRS transmission DMRS transmission.

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 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, 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 according to the index value.

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 number of pre-DMRS symbols corresponding to the first DMRS port as 2 as an example, then The number of pre-DMRS symbols corresponding to the second DMRS port is 1. When the number of DMRS CDM groups not used to carry data is 2 and the number of pre-DMRS symbols is 2, the port index value of the corresponding first DMRS port has 8 candidate values, such as 0 to 7 in the third column in Table 3 ; When the number of DMRS CDM groups that are not used to carry data is 2 and the number of pre-DMRS symbols is 1, the port index value of the corresponding second DMRS port has 4 candidate values, such as 0 to 0 in the fifth column in Table 3 3.

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.

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 at least one The DMRS ports included in the first DMRS port are different from the DMRS ports included in the at least one second DMRS port. The difference between any DMRS port included in the at least one first DMRS port and the DMRS port included in the at least one second DMRS port mentioned here can be understood as the difference between any port index value of the first DMRS port in Table 3 and the second DMRS port. Any of the port index values are different. The third threshold here may be that when the number of pre-DMRS symbols is 1, the third indication information indicates the maximum port index value of the DMRS port corresponding to the number of DMRS CDM groups 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, and the maximum index of the corresponding DMRS port is 3, and the index value In the 4 rows from 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.

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 the third threshold, the at least one first DMRS port includes The DMRS port of the at least one second DMRS port is the same as the DMRS port included in the at least one second DMRS port. Any DMRS port included in the at least one first DMRS port mentioned here is the same as the DMRS port included in the at least one second DMRS port, which can be understood as any port index value of the first DMRS port in Table 3 and the second DMRS port Any port index value of the same. The third threshold here may be that when the number of pre-DMRS symbols is 1, the third indication information indicates the maximum port index value of the DMRS port corresponding to the number of DMRS CDM groups 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, and the maximum index of the corresponding DMRS port is 3, the index value 4 rows from 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.

table 3

Possible manner 2, the third indication information here is used to indicate the number of pre-DMRS symbols, DMRS CDM groups not used to bear data, and at least one first DMRS port. For example, the number of pre-DMRS symbols indicated by the third indication information, the number of DMRS CDM groups not used to carry data, and at least one first DMRS port may be the first antenna indicated by the antenna port field in 3GPP standard TS 38.212 port configuration. The network device may also send fourth indication information to the terminal device, where the fourth indication information is used to indicate at least one second DMRS port.

It should be understood that the first DMRS port here may be understood as a DMRS port used when the frequency domain resources corresponding to the first number or the second number indicated by the third indication information perform 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. 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, then at this time the first sub-frequency domain resource uses at least one second DMRS port for DMRS transmission.

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 an index value, the second column is the number of DMRS CDM groups 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 according to the index value. The fourth indication information is used to indicate the port index value of a second DMRS port corresponding to the first antenna port configuration.

Table 4

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 indicated by the antenna port field in the existing 3GPP standard TS 38.212 is used Configuration, the two parts of frequency domain resources can only use one DMRS port, then 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 that are not used to carry data is the same, the ranges of the index values of the DMRS ports that can be selected for the frequency domain resources with the number of pre-DMRS symbols being 1 and 2 are not the same, so that the two parts of the frequency domain resources Selecting the same DMRS port will inevitably make some DMRS ports corresponding to the frequency domain resources configured with the number of pre-DMRS symbols 2 unusable, resulting in waste of resources.

It should be noted that the first indication information, the second indication information and the third indication information in the solution of this application may be sent to the terminal device by the network device through one DCI, or may be sent to the terminal device through different DCIs. In addition, the numbering of each indication information in FIG. 6 is only for the convenience of description, and does not limit the order of the steps. In a specific implementation, the above indication information may be sent by the network equipment to the terminal equipment, or may be sent by the network equipment to the terminal equipment. The terminal devices send successively.

In the embodiment of the present application, DMRS ports are respectively configured for two parts of frequency domain resources with different numbers of pre-DMRS symbols configured in the frequency domain resources carrying network equipment and terminal equipment transmission signals, which avoids waste of DMRS port resources and improves resources. Scheduling flexibility.

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

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 bear the downlink signal sent by the network device to the terminal device. Exemplarily, the first frequency domain resource belongs to a part of the BWP. Exemplarily, the network device indicates the first frequency domain resource to the terminal device through the "frequency domain resource allocation" field in the DCI.

It should be understood that the first indication information includes first sub-indication information and second sub-indication information. Wherein, the first sub-indication information is used to indicate the first frequency domain resource. The first sub-indication information adopts a resource indication manner of continuous resource allocation, and indicates the first frequency domain resource through the RIV. Any RIV corresponds to a group of parameters used to determine continuously allocated frequency domain resources, including the sequence number RB _start of the starting resource block of the first frequency domain resource and the number L _RBs of continuously allocated resource blocks. The second sub-indication information is mainly used to indicate the configuration of the resource block group in the second frequency domain resource, which will be divided into three possible situations for detailed introduction below. Exemplarily, the first indication information is the "frequency domain resource allocation" field in the DCI, and the existing "frequency domain resource allocation" field can be used to indicate the first frequency domain resource. In the second possible implementation manner In , the "frequency domain resource allocation" field is reused to indicate the configuration of resource block groups in the second frequency domain resource.

Before introducing the three possible situations of the second sub-indication information, the first frequency domain resource, the second frequency domain resource, the first sub-frequency domain resource and the second sub-frequency domain resource are introduced in detail in conjunction with FIG. difference and connection.

The first frequency domain resource includes a first sub-frequency domain resource and a second sub-frequency domain resource, where the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.

Exemplarily, Fig. 8 shows a schematic diagram of an example of the first frequency domain resource. As shown in Figure 8, the first frequency domain resources (all the boxes in Figure 8) include the first sub-frequency domain resources (blank boxes in Figure 8) and the second sub-frequency domain resources (the slanted squares in Figure 8 Box), S801 is the second frequency domain resource, the first frequency domain resource includes the second frequency domain resource. As shown in (a) in Figure 8, the second frequency domain resource may include one or more resource block groups belonging to the first sub-frequency domain resource (S802), and also include one or more resource block groups belonging to the second sub-frequency domain resource. A plurality of resource block groups (S803). Alternatively, as shown in (b) of FIG. 8 , one or more resource block groups ( S803 ) included in the second frequency domain resource all belong to the second sub-frequency domain resource. Or, as shown in (c) in FIG. 8, one or more resource block groups (S802) included in the second frequency domain resource all belong to the first sub-frequency domain resource.

It should be understood that "the second frequency domain resource is a predetermined frequency domain resource among the first frequency domain resources" can be understood as, assuming that the first frequency domain resource includes N first resource block groups, the second frequency domain resource The 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 may be the first resource block groups with indexes 0, 1, ..., i-1 in the first frequency domain resource, as shown in (a ), S801 is the first resource block group whose indices are 0 to 5 in the first frequency domain resource. Alternatively, the i first resource block groups included in the second frequency domain resource may be the first resource block groups indexed as N-i,...N-1 in the first frequency domain resource, as shown in (d) in FIG. 8 , S801 is the first resource block group with indexes 15 to 20 in the first frequency domain resource.

Possibility one, 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 frequency sub-domain resource, and the second frequency domain resource Other resource block groups in domain resources except the one or more resource block groups belong to the second sub-frequency domain resource.

Possibility 2, 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 the second Other resource block groups in the frequency domain resources except the one or more resource block groups belong to the first sub-frequency domain resource.

Possible situation three, 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 to carry data, where the second The number of pre-DMRS symbols in the second frequency domain resource or the number of DMRS CDM groups not used to carry data is the first number of resource block groups belonging to the first sub-frequency domain resource, and the number of pre-DMRS symbols in the second frequency domain resource Or, resource block groups whose number of DMRSCDM groups not used to carry data is the second number belong to the second sub-frequency domain resource.

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 of the following conditions. Wherein, the third frequency domain resource includes the first frequency domain resource.

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

Exemplarily, the first quantity set may include {1,2,3,4,5,6,7,9,10,14,15,22,31,44,63,88,89,90,126,127,175,176,177,178,179,180,252,253,254,2 55 } in one or more values. Alternatively, it may also be other sets, which are not limited in this application.

Condition 2, the number of resource blocks included in the third frequency domain resource is N, and the N belongs to the preset second number set; or in other words, the network device or terminal device expects the number of resource blocks included in the third frequency domain resource The quantities belong to the second set of quantities.

Exemplarily, the first quantity set may include one or more values in {32, 33, 45, 46, 64, 65, 91, 92, 128, 129, 130, 131, 140, 141, 181, 182, 256, 257}. Alternatively, it may also be other sets, which are not limited in this application.

Condition three, 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.

Taking the third frequency domain resource as the BWP as an example, the third condition will be described in detail below.

其中，

为BWP的 大小，

为第一资源块组的大小。Exemplarily, the size of the BWP and the size of the first resource block group satisfy

in,

is the size of the BWP,

is the size of the first resource block group.

It should be understood that when any one of the above three conditions is satisfied, 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 1 or possible situation 2) Alternatively, the number of pre-DMRS symbols of at most n first resource block groups in the first frequency domain resource may be indicated (corresponding to the above possible case three). Or it can be said that 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 the first resource block groups in the first frequency domain resources that the second sub-indication information can indicate, and n is a positive integer. Moreover, the value of n may also be determined in various ways. In the following, three ways of determining the value of n are taken as examples to introduce possible methods of determining the value of n.

Mode 1, the terminal device determines n according to the high-layer signaling sent by the network device. or,

In mode 2, the terminal device is determined according to n corresponding to each BWP predefined in the standard. or,

Mode 3, the terminal device determines n according to the size of the BWP and the size of the first resource block group.

The method for determining the value of n will be described in detail below by taking mode 3 as an example.

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:

其中，

为第一资源 块组的大小，

为BWP的大小。

in,

is the size of the first resource block group,

is the size of the BWP.

It can be seen that, when configuring different BWPs and different sizes of the first resource block group, the value of n may be different.

In this application, the maximum number of the first resource block groups included in the second frequency domain resource is denoted as n, and the number of the first resource block groups included in the second frequency domain resource is denoted as i.

It should be understood that in the embodiment of the present application, after any one of the above conditions 1 to 3 is satisfied, and the value of n is determined, it is also possible that the second sub-indication information indicates 0 first resource blocks in a specific implementation The case of a group, or the case of i=0, is no different from the first possible implementation. In order 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 satisfy the second preset condition.

其中，

为第一资源块组的大小，

为BWP的大小。Exemplarily, the second preset condition is

in,

is the size of the first resource block group,

is the size of the BWP.

The number i of the first resource block groups included in the second frequency domain resource may be determined by the following formula:

其中，

为第一频域资源中包括的第一资源块组的数量，

为BWP中包括的第一资源块组的数量。

in,

is the number of first resource block groups included in the first frequency domain resource,

is the number of first resource block groups included in the BWP.

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 resource.

In the following two possible examples, when the size of the first frequency domain resource satisfies the second preset condition, 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 The frequency domain resource and how the terminal device determines the first frequency domain resource and the second frequency domain resource in the first frequency domain resource according to the first indication information are described in detail.

In a first possible example, (1) the terminal device determines the first sub-indication information according to the first indication information, the first sub-indication information is used to indicate the frequency domain pattern of the first frequency domain resource corresponding to the RIV, and according to the first sub-indication information The indication information determines the first frequency domain resource.

The first indication information adopts a resource indication manner of continuous resource allocation, and indicates the first frequency domain resource through the RIV. The first sub-indication information, that is, the frequency domain pattern corresponding to the RIV indicated by the first indication information, the frequency domain pattern includes a candidate value of the sequence number RB _start of the starting resource block of the first frequency domain resource and the number of consecutive allocated resource blocks A candidate value for L _RBs .

的情况下，该频域图样可 以对应至少两个RIV，且该至少两个RIV中的任意两个RIV不相等，其中，

为第一资源块组的大小，

为BWP的大小。It should be understood that each RIV corresponds to a frequency domain pattern, wherein each frequency domain pattern includes a candidate value of the sequence number RB _start of the starting resource block of the first frequency domain resource and a value of the number L _RBs of consecutively allocated resource blocks Candidate value. Candidate values for the number of consecutively allocated resource blocks L _RBs included in the frequency domain pattern are greater than

In the case of , the frequency domain pattern may correspond to at least two RIVs, and any two RIVs in the at least two RIVs are not equal, wherein,

is the size of the first resource block group,

is the size of the BWP.

其中，

为BWP的大小。Wherein at least two RIVs corresponding to each frequency domain pattern include a first RIV that is smaller than a second preset threshold, and all RIVs in the at least two RIVs except the first RIV are larger than the second preset threshold . The second preset threshold is

in,

is the size of the BWP.

Exemplarily, when n is 2, the method of determining the RIV corresponding to the frequency domain pattern is as follows:

频域图样对应1个RIV，该RIV的计算方式如TS38.214 中所示；1) if

The frequency domain pattern corresponds to one RIV, and the calculation method of the RIV is as shown in TS38.214;

频域图样对应于至少2个RIV，该2个RIV的计算方 式如下所示：2) if

The frequency domain pattern corresponds to at least 2 RIVs, which are calculated as follows:

频域图样对应于2个RIV，即RIV0和RIV1，RIV0的计算方式如TS 38.214中所述；RIV1的计算方式如下所示：如果

i＝1；否则，

i＝1；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

i=1; otherwise,

i=1;

频域图样对应于4个RIV，即RIV2、RIV3、RIV4和RIV5，RIV2的计算方式如38.214中所述，RIV2、RIV3和RIV4的计算方式如下所示：如果

i＝1，2,3,4；否则，

i＝1,2,3,4；if

The frequency domain pattern corresponds to 4 RIVs, namely RIV2, RIV3, RIV4 and RIV5. RIV2 is calculated as described in 38.214, and RIV2, RIV3 and RIV4 are calculated as follows: If

i=1, 2, 3, 4; otherwise,

i=1,2,3,4;

in,

Exemplarily, one candidate value of each frequency domain pattern of the first frequency domain resource corresponds to 2 ⁱ RIVs.

和

与该候选值对应的第一频域资源中的第二频域资源包括的第一资源块组的数量i为1，与RIV 0和RIV1对应，频 域图样的候选值

和

与RIV 2、RIV 3、RIV 4、RIV 5对应，与该候选值对应的 第一频域资源中的第二频域资源包括的第一资源块组的数量i为2。Exemplarily, as shown in Table 5, the candidate values of the frequency domain pattern

with

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

with

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 resource in the first frequency domain resource corresponding to the candidate value is 2.

table 5

(2) The terminal device determines the second sub-indication information according to the first indication information. The second sub-indication information is used to indicate the pre-DMRS configuration pattern corresponding to the RIV. According to the second sub-indication information, each sub-indication information of the second frequency domain resource is determined. Configuration of the number of pre-DMRS symbols of a resource block group. Before this, the terminal device needs to obtain pattern information, which 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 may be pre-configured on the terminal device side, or sent by the network device to the terminal device. It can also be said that the terminal device determines the second sub-indication information according to 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; determines the second frequency domain according to the pattern. Configuration of the number of pre-DMRS symbols of each first resource block group of resources.

It should be understood that (2) may include different situations in specific implementations. The following two possible ways are taken as examples to describe in detail how the terminal device determines the pre-DMRS symbol of each first resource block group of the second frequency domain resource The number of configuration cases.

Possible way 1, corresponding to the above possible situation 3, the terminal device determines the configuration of the number of pre-DMRS symbols of each first resource block group of the second frequency domain resource according to the second sub-indication information.

In the configuration pattern of the number of pre-DMRS symbols corresponding to the second frequency domain resource, 2 ⁱ RIVs are used to indicate all possible configurations of the number of pre-DMRS symbols of the i first resource block groups in the second frequency domain resource Condition. Among them, among the 2 ⁱ RIVs, any one RIV corresponds to the configuration of the number of pre-DMRS symbols of the i first resource block group, and any two RIVs correspond to the configuration of the number of pre-DMRS symbols of the i first resource block group The configuration is different. That is to say, the mapping relationship between multiple patterns and multiple index values may be the mapping relationship between multiple patterns and multiple RIVs. One RIV among the multiple RIVs may uniquely correspond to one of the multiple patterns. Any one of the multiple patterns may include a 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 plurality of patterns are different. Wherein, according to the method in (1), the multiple RIVs correspond to a frequency domain pattern, that is, the 2 ⁱ RIVs correspond to a frequency domain pattern, and the frequency domain pattern includes the initial frequency domain resource A candidate value of the sequence number RB _start of the resource block and a candidate value of the number L _RBs of continuously allocated resource blocks. Wherein, the number L _RBs of consecutive allocated resource blocks included in the frequency domain pattern is greater than

Exemplarily, the number of first resource block groups included in the BWP of the terminal device is 8, and the terminal device determines that n=2, the number of first resource block groups included in the first frequency domain resource is 8, then i= 2. That is, the second sub-indication information needs to indicate the number of pre-DMRS symbols of the two first resource block groups, so four RIVs are required to indicate the configuration patterns of the number of pre-DMRS symbols, which are RIV1, RIV2, RIV3 and RIV4, 4 Table 6 below shows the number configuration pattern of pre-DMRS symbols of the two first resource block groups corresponding to each RIV. Table 6 may be an exemplary pattern information.

Table 6

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 number indicated by the third indication information in S604 is 1, when the terminal device receives RIV 0, determine the configuration of the number of pre-DMRS symbols of the two first resource block groups as [2,2] , then the terminal device can determine that the two first resource block groups are the second sub-frequency domain resources; when the terminal device receives RIV 1, determine the configuration of the number of pre-DMRS symbols of the two first resource block groups as [ 1, 2], 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 RIV2, it determines the two The configuration of the number of pre-DMRS symbols in a resource block group 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. domain resources, when the terminal device receives RIV 3, it is determined 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 A first sub-frequency domain resource.

Exemplarily, the number of first resource block groups included in the BWP of the terminal device is 8, and the terminal device determines that 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 a first resource block group, and then two RIVs are required to indicate the configuration pattern of the number of pre-DMRS symbols, which are respectively RIV4, RIV5, and 2 RIVs correspond to The configuration pattern of the number of pre-DMRS symbols in one first resource block group is shown in Table 7 below. Table 7 may be an exemplary pattern information.

Table 7

RIV The number of pre-DMRS symbols of the first resource block group 0 RIV 4 2 RIV 5 1

The terminal device determines the pre-DMRS symbol configuration of one first resource block group according to 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 is determined that the configuration of the number of pre-DMRS symbols of one first resource block group is 2, then the terminal device can Determine that the first resource block group is the first sub-frequency domain resource; when the terminal device receives RIV5, determine that the configuration of the number of pre-DMRS symbols of the first resource block group is 1, then the terminal device can determine The one first resource block group is the second sub-frequency domain resource.

Optionally, the terminal device needs to obtain pattern information, and the pattern information 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 the 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.

Exemplarily, the frequency domain pattern of the first frequency domain resource and the configuration pattern of the number of preamble DMRS symbols are shown in Table 8 and Table 9 below. Among them, Table 8 corresponds to Table 6 above, and Table 9 corresponds to Table 7 above.

In the example corresponding to Table 6, the terminal device receives the RIV in the first indication information, and can determine the value of the pre-DMRS symbol of each first resource block group in the first frequency domain resource and the second frequency domain resource according to Table 8. Quantity configuration. Table 8 may be an example of pattern information.

Table 8

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

Table 9

Possible manner 2, corresponding to the above possible situations 1 and 2, the terminal device determines each first Configuration of the number of pre-DMRS symbols of the resource block group.

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

In the configuration pattern of the number of pre-DMRS symbols corresponding to the second frequency domain resource, 2 ⁱ RIVs are used to indicate all possible configurations of the number of pre-DMRS symbols of the i first resource block groups in the second frequency domain resource Condition. Among the 2 ⁱ RIVs, any one RIV corresponds to the configuration of the number of pre-DMRS symbols of the i first resource block group, and any two RIVs correspond to the configuration of the number of pre-DMRS symbols of the i first resource block group The configuration is different.

Exemplarily, the number of first resource block groups included in the BWP of the terminal device is 8, and the terminal device determines that n=2, the number of first resource block groups included in the first frequency domain resource is 8, then i= 2. That is, the second sub-indication information needs to indicate the number of pre-DMRS symbols of the two first resource block groups, so four RIVs are required to indicate the configuration patterns of the number of pre-DMRS symbols, which are RIV1, RIV2, RIV3 and RIV4, 4 Table 10 below shows the number configuration pattern of pre-DMRS symbols of two first resource block groups corresponding to one RIV. In the configuration pattern of Table 10, 0 indicates 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 indicates that it is different.

Table 10

The terminal device determines the configuration of the number of pre-DMRS symbols of the two first resource block groups according to 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 RIV 0, 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 the first sub-frequency domain resources; when the terminal device receives RIV 1, determine the configuration and the first number of pre-DMRS symbols of the first resource block group 0 If the configuration of the number of pre-DMRS symbols of the first resource block group 1 is the same as the first number, 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 second sub-frequency domain resource. A 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 number of pre-DMRS symbols of the first resource block group 1 is different from the first number, 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 3, If 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, the terminal device may determine that both the two first resource block groups are the second sub-frequency domain resources.

Exemplarily, the number of first resource block groups included in the BWP of the terminal device is 8, and the terminal device determines that 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 a first resource block group, and then two RIVs are required to indicate the configuration pattern of the number of pre-DMRS symbols, which are respectively RIV4, RIV5, and 2 RIVs correspond to Table 11 below shows the configuration patterns of the number of pre-DMRS symbols in one first resource block group. In the configuration patterns in Table 11, 0 indicates 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 indicates that it is different.

Table 11

RIV The number of pre-DMRS symbols of the first resource block group 0 RIV 4 0 RIV 5 1

The terminal device determines the pre-DMRS symbol configuration of one first resource block group according to 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 is determined 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 may determine that the first resource block group is the first sub-frequency domain resource; when the terminal device receives RIV5, it determines that the configuration of the number of pre-DMRS symbols of the first resource block group is different from the first number , the terminal device may determine the one first resource block group as the second sub-frequency domain resource.

It should be noted that the RIV sent in the first sub-indication information and the second sub-indication information may be the same value, or in other words, one RIV is sent in the first sub-indication information, and the terminal device determines the first frequency domain based on the one RIV. Configuration of the number of pre-DMRS symbols of each first resource block group in the resource and the second frequency domain resource.

Exemplarily, the frequency domain pattern of the first frequency domain resource and the configuration pattern of the number of preamble DMRS symbols are shown in Table 12 and Table 13 below. Among them, Table 12 corresponds to Table 10 above, and Table 13 corresponds to Table 11 above.

In the example corresponding to Table 10, the terminal device receives the RIV in the first indication information, and can determine the value of the pre-DMRS symbol of each first resource block group in the first frequency domain resource and the second frequency domain resource according to Table 12. Quantity configuration.

Table 12

In the example corresponding to Table 11, the terminal device receives the RIV in the first indication information, and can determine the value of the pre-DMRS symbol of each first resource block group in the first frequency domain resource and the second frequency domain resource according to Table 13. Quantity configuration.

Table 13

In the second possible example, in order to reduce the processing complexity of the terminal device, take n as a fixed value of 1.

n＝1时，第二预设条件为第一频域资源包括的

其中，

为第一资源块组的大小，

为BWP的大小。Exemplarily, the above-mentioned second preset condition is that the first frequency-domain resource includes

When n=1, the second preset condition is that the first frequency domain resources include

in,

is the size of the first resource block group,

is the size of the BWP.

It should be understood that when the above-mentioned second preset condition is met, i>0, and since i≤n, i=1. The second frequency domain resource is a predetermined first resource block group.

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

其中，

为BWP的大小。The first sub-indication information adopts a resource indication manner of continuous resource allocation, and indicates the first frequency domain resource through the RIV. The frequency domain pattern of the first frequency domain resource corresponds to two RIVs, denoted as the first RIV and the second RIV. Wherein, the first RIV is not equal to the second RIV. The first RIV is smaller 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 respectively correspond to different numbers of pre-DMRS symbols. The second preset threshold is

in,

is the size of the BWP.

The following describes the calculation methods of the first RIV and the second RIV by way of example.

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

时，第二RIV等于

当

时，第二RIV等于

其中，RB_start为第一频域资源的起始资源块的序号，L_RBs为连续分配资源块的数量，

为BWP的大小，

为第 一资源块组的大小。The second RIV can be determined as follows: when

, the second RIV is equal to

when

, the second RIV is equal to

Wherein, RB _start is the serial number of the starting resource block of the first frequency domain resource, and L _RBs is the number of continuously allocated resource blocks,

is the size of the BWP,

is the size of the first resource block group.

(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 resource according to the second sub-indication information in the first indication information.

The second sub-indication information includes a 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 one RIV 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 the first value, when the one 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 one RIV 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 a second value, where the second value is not equal to the first value, and the first value and the second value are respectively {1, 2} in one.

第一频域资源包括的连续分配RB数为15大于

即第一频域资源的大小满足第二预设条件，则第一频域资源对应的连续资 源分配图样对应于2个RIV。该2个为63和167。第二预设门限

当终端设备接收到第二子指示信息指示的RIV为167时，由于RIV大于136，终 端设备确定第一频域资源中1个第一资源块组的前置DMRS符号数为2，当终端设备接收 到第二子指示信息指示的RIV为63时，由于RIV小于136，终端设备确定第一频域资源 中1个第一资源块组的前置DMRS符号数为1。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 for the terminal device to receive downlink signals, that is, the first frequency domain resource includes RB 0 to 14 , the size of the first resource block group is 4,

The number of continuously allocated RBs included in the first frequency domain resource is 15 or more

That is, the size of the first frequency domain resource satisfies the second preset condition, and the continuous resource allocation pattern corresponding to the first frequency domain resource corresponds to two RIVs. The 2 are 63 and 167. 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 a first resource block group in the first frequency domain resource is 2, when the terminal device When receiving 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.

S602 is similar to S602 in the first possible implementation manner, and details are not repeated here.

In the embodiment of the present application, by configuring the number of different pre-DMRS symbols on the scheduled frequency domain resources according to the communication needs, flexible resource configuration in the frequency domain is realized, the overhead for transmitting DMRS is reduced, and by multiplexing the existing The field indicates a predetermined frequency domain resource among the scheduled frequency domain resources, which further reduces the overhead indicated by the DCI. Further, when the size of the predetermined frequency domain resource is fixed, the embodiment of the present application can reduce the processing complexity of the terminal device.

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

Exemplarily, as shown in Figure 8, the blocks in the first frequency domain resource (all blocks in Figure 8) except S801 are the above "other frequency domain resources", and S804 is the above "other frequency domain resources" Among the frequency domain resources belonging to the first sub-frequency domain resources.

Wherein, the manner in which the second indication information indicates the frequency domain resources belonging to the first sub-frequency domain resources in the above "other frequency domain resources" is the same as in S603 in the first possible implementation manner, the second indication information indicates the first The manner of the sub-frequency domain resources is similar, and will not be repeated here.

In the embodiment of the present application, in the frequency domain resources carrying 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 signaling overhead and saves resources .

The terminal device may determine the first sub-frequency domain resource according to the first sub-frequency domain resource indicated by the second indication information. For a specific determination method, refer to methods 1 and 2 in the first possible implementation manner, and details will not be repeated here. For details about the four possible ways of determining the size of the first resource block group, please refer to possible ways 1 to 4 in the first possible implementation mode, and details will not be repeated here.

Optionally, S604 is similar to S604 in the first possible implementation manner, and details are not repeated here.

Optionally, the method 600 further 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 the same as the number of the first DMRS port. The number of at least one second DMRS port is equal; 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 first When the threshold is three, 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; when the index of all DMRS ports included in the at least one first DMRS port and the at least one second When the indexes of all the DMRS ports included in the two DMRS ports 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 includes the same DMRS port; A 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 the fourth indication information, The fourth indication information is different from the third indication information.

For the detailed description of the above solution, refer to the detailed description of possible mode 1 and possible mode 2 of the solution in the first possible implementation mode, and details will not be repeated here.

It should be noted that the first indication information, the second indication information and the third indication information in the solution of this application may be sent to the terminal device by the network device through one DCI, or may be sent to the terminal device through different DCIs. In addition, the numbering of each indication information in FIG. 6 is only for the convenience of description, and does not limit the order of the steps. In a specific implementation, the above indication information may be sent by the network equipment to the terminal equipment, or may be sent by the network equipment to the terminal equipment. The terminal devices send successively.

In the third possible implementation, the main steps are similar to those in the first possible implementation. Taking (2) in S602 in the first possible implementation as an example for illustration, it is necessary to convert the The number of front DMRS ports is replaced by the number of DMRS CDM groups not used to carry data.

In the fourth possible implementation, the main steps are similar to those in the second possible implementation. Taking (2) in S602 in the second possible implementation as an example for illustration, it is necessary to convert the The number of front DMRS ports is replaced by the number of DMRS CDM groups not used to carry data.

It should be understood that the value of the number of front 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 Similar to the first possible implementation manner and the second possible implementation manner respectively, the fourth possible implementation manner may uniquely determine the number of DMRS CDM groups not used to carry data in the second frequency domain resource. However, when the terminal device adopts DMRStype2, there are three configurations of the number of DMRS CDM groups not used to carry data, so the terminal device cannot uniquely determine the number of DMRS CDM groups not used to carry data.

The following example introduces the difference between the third possible implementation and the first possible implementation:

The method 600 further includes that the network device sends fifth indication information to the terminal device, and correspondingly, the terminal device receives fifth indication information from the network device, where the fifth indication information is used to indicate that the first sub-frequency domain resources are not used to bear data. The number of DMRS CDM groups. The terminal device determines the configuration of the number of DMRS CDM groups not used to carry data in all first resource block groups in the first frequency domain resource according to the fifth indication information.

The following takes the third indication information indicating the second quantity and the third indication information indicating the first quantity as examples for detailed introduction.

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

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

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

Table 14

As another example, the fifth indication information may index the difference between the number of DMRS CDM groups not used to bear data corresponding to the first sub-frequency domain resources and the second number.

For example, as shown in Table 15, when the second number is 1, the fifth indication information indicates index 0, then the terminal device determines that the number of DMRS CDM groups that are not used to carry data in the first sub-frequency domain resource is 2; when the second When the second number is 1, the fifth indication information indicates index 1, then the terminal device determines that the number of DMRS CDM groups not used to carry data in the first sub-frequency domain resource is 3; when the second number is 2, the fifth indication information If index 0 is indicated, the terminal device determines that the number of DMRS CDM groups not used to carry data in the first sub-frequency domain resource is 1; when the second number is 2, the fifth indication information indicates index 1, then the terminal device determines that the first The number of DMRS CDM groups that are not used to carry data in the sub-frequency domain resources is 3; when the second number is 3, the fifth indication information indicates index 0, and the terminal device determines that the DMRS CDM groups that are not used to carry data in the first sub-frequency domain resources The number of DMRS CDM groups is 2; when the second number is 3, the fifth indication information indicates an index of 1, and the terminal device determines that the number of DMRS CDM groups not used to carry data in the first sub-frequency domain resource is 1.

Table 15

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

The specific implementation manner is similar to that when the third indication information indicates the second quantity, and will not be repeated here.

For the third possible implementation, in the embodiment of the present application, 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, flexible resource configuration in the frequency domain is realized, reducing the cost of The overhead for transmitting DMRS.

The following example introduces the difference between the fourth possible implementation and the second possible implementation:

(1) When the second sub-indication information in S601 indicates the number of DMRS CDM groups that are not used to carry data in the first resource block group in the second frequency domain resource by indexing, it is assumed that different resource block groups in the first frequency domain resource The configuration of the number of DMRS CDM groups that are not used to bear data for the first resource block group includes three situations, that is, 1, 2, and 3, which can only be applied to "possible situation three", that is, the second sub-indication The information is used to indicate the number of DMRS CDM groups not used to carry data corresponding to each resource block group in the second frequency domain resource, where the number of DMRS CDM groups not used to carry data in the second frequency domain resource is The first number of resource block groups belongs to the first sub-frequency domain resource, and the number of pre-DMRS symbols in the second frequency domain resource or the number of DMRS CDM groups that are not used to carry data is the second number of resource block groups. Sub-frequency domain resources; assuming that different first resource block groups in the first frequency domain resources correspond to the configuration of the number of DMRSCDM groups that are not used to carry data, there are only 2 cases, if 1, 2, or 2, 3 One, or one, three, then "possible situation 1", "possible situation 2" and "possible situation 3" in S601 can be applied.

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

Exemplarily, when a pattern is used to indicate the number of DMRS CDM groups not used to carry data or the above difference, the number of RIVs corresponding to the second frequency domain resources including i first resource block groups is 3 ⁱ .

(2) Method 600 further includes that the network device sends fifth indication information to the terminal device, and accordingly, the terminal device receives fifth indication information from the network device, where the fifth indication information is used to indicate that the first sub-frequency domain resource is not used for Number of DMRS CDM groups carrying data. The terminal device determines the configuration of the number of DMRS CDM groups that are not used to bear data in all first resource block groups in the first frequency domain resource according to the fifth indication information.

For specific implementation, reference may be made to related solutions in the foregoing "differences between the third possible implementation manner and the first possible implementation manner", and details will not be repeated here.

For the fourth possible implementation, in this embodiment of the present application, DMRS is configured for two frequency domain resources that are not used to bear data and are configured in frequency domain resources that are not used to bear data. Ports realize flexible resource configuration in the frequency domain, avoiding the waste of DMRS port resources and improving the flexibility of resource scheduling.

In the fifth possible implementation mode, when DMRStype2 is used, there are three configurations of the number of DMRS CDM groups not used to carry data, that is, the number of DMRS CDM groups 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 numbers of DMRS CDM groups not used to bear data corresponding to the three sub-frequency domain resources are different, in the above third possible implementation On the basis of the method, there is the following difference: the terminal device determines that the third sub-frequency domain resource is not used for carrying data DMRS Number of CDM groups.

For the fifth possible implementation, in the embodiment of the present application, DMRS are respectively configured for two parts of frequency domain resources that are not used to bear data and are configured in frequency domain resources that are not used to bear data. Ports realize flexible resource configuration in the frequency domain, avoiding the waste of DMRS port resources and improving the flexibility of resource scheduling.

In the sixth possible implementation, when DMRStype2 is used, there are three configurations of the number of DMRS CDM groups not used to carry data, that is, the number of DMRS CDM groups not used to carry data is 1 or 2 or 3, and the first frequency domain resource includes The first sub-frequency domain resources, the second sub-frequency domain resources and the third sub-frequency domain resources, and the numbers of DMRS CDM groups not used to bear data corresponding to the three sub-frequency domain resources are different, in the above third possible implementation On the basis of the method, there is the following difference: the terminal device determines that the third sub-frequency domain resource is not used for carrying data DMRS Number of CDM groups.

For the sixth possible implementation, in this embodiment of the present application, DMRSs are respectively configured for two parts of frequency domain resources that are not used to bear data and are configured in frequency domain resources that are not used to bear data. Ports realize flexible resource configuration in the frequency domain, avoiding the waste of DMRS port resources and improving the flexibility of resource scheduling.

The seventh possible implementation is suitable for flexible scheduling of the number of pre-DMRS symbols corresponding to each first resource block group on the first frequency domain resource, or, when DMRS type1 is used, it is suitable for flexible scheduling of the first frequency domain resource The number of DMRS CDM groups that are not used to carry data corresponding to each first resource block group, or the number of DMRS CDM groups that are not used to carry data when DMRS type2 is used only includes two configuration situations, which is applicable to flexible scheduling of the first frequency The number of DMRS CDM groups not used to bear data corresponding to each first resource block group on the domain resource.

It should be noted that the seventh possible implementation will be described below by taking the number of pre-DMRS symbols as an example. The "number of pre-DMRS symbols" in the following solutions can also be replaced with "not used The number of DMRSCDM groups".

S601. The network device sends first indication information to the terminal device. Correspondingly, the terminal device receives the first indication information from the network device, where the first indication information is used to indicate the first frequency domain resource.

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 bear the downlink signal sent by the network device to the terminal device. Exemplarily, the first frequency domain resource belongs to a part of the BWP. Exemplarily, the network device indicates the first frequency domain resource to the terminal device through the "frequency domain resource allocation" field in the DCI.

S602. The network device sends the PDSCH on the first frequency domain resource, and correspondingly, the terminal device receives the PDSCH on the first frequency domain resource.

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

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.

The content indicated by the second indication information and the third indication information will be described below with examples respectively.

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 the number of the first resource block group in the first frequency domain resource The number of pre-DMRS symbols of one or more first resource block groups 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 the first resource block group except the smallest index Other first resource block groups other than the first resource block group.

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 the number of the first resource block group in the first frequency domain resource The number of pre-DMRS symbols of one or more first resource block groups 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 the first resource block group except the smallest index Other first resource block groups other than the first resource block group.

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 the number of the first resource block group in the first frequency domain resource The number of pre-DMRS symbols of one or more first resource block groups 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 the first resource block group except the largest index Other first resource block groups other than the first resource block group.

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 the number of the first resource block group in the first frequency domain resource The number of pre-DMRS symbols of one or more first resource block groups 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 the first resource block group except the largest index Other first resource block groups other than the first resource block group.

The scheme of Example 1 will be described in detail below in conjunction with FIG. 7 . As shown in Fig. 7, there are four first resource block groups in total, which are respectively first resource block groups 0, 1, 2, and 3, and their indexes are 0, 1, 2, and 3 respectively. Wherein, the first resource block group with the smallest index is the first resource block group 0. Assume 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 group 1 and 2 is the same as that of the first resource block group 0. If the number of pre-DMRS symbols in block group 0 is different, the terminal device determines that the number of pre-DMRS symbols in the first resource block group 1 and 2 is 2 according to the second indication information. Further, the terminal device determines that the number of pre-DMRS symbols in the first resource block group 3 is Set the number of DMRS symbols to 1. Subsequently, in S602, the terminal device receives the PDSCH on the first frequency domain resource according to the configuration of the pre-DMRS symbols on the first frequency domain resource.

It should be noted that the first indication information, the second indication information and the third indication information in the solution of this application may be sent to the terminal device by the network device through one DCI, or may be sent to the terminal device through different DCIs. In addition, the numbering of each indication information in FIG. 6 is only for the convenience of description, and does not limit the order of the steps. In a specific implementation, the above indication information may be sent by the network equipment to the terminal equipment, or may be sent by the network equipment to the terminal equipment. The terminal devices send successively.

In this embodiment of the present application, DMRS ports or DMRS CDM groups not used to carry data are respectively configured for two parts of frequency domain resources configured in the frequency domain resources carrying network equipment and terminal equipment transmission signals that are not used to carry data. The number of groups realizes flexible resource configuration in the frequency domain, avoids the waste of DMRS port resources, and improves the flexibility of resource scheduling.

Above, the method provided by the embodiment of the present application is described in detail with reference to FIG. 6 to FIG. 8 . Hereinafter, the communication device provided by the embodiment of the present application will be described in detail with reference to FIG. 9 to FIG. 10 .

Fig. 9 is a schematic block diagram of a communication device for resource allocation provided by an embodiment of the present application. As shown in FIG. 9 , the communication device 10 may include a transceiver module 11 and a processing module 12.

Wherein, 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, receiving the first indication information or sending the second indication information. The processing module 12 may be used for performing device content processing, for example, acquiring pattern information.

In a possible design, the communication device 10 may correspond to the network device in the foregoing method embodiments.

Specifically, the communication device 10 may correspond to the network device in the method 600 according to the embodiment of the present application, the communication device 10 may include a module for performing the operations performed by the network device in the corresponding method, and the communication device Each unit in 10 is to implement the operations performed by the network device in the corresponding method.

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

Specifically, in a possible embodiment, the transceiver module 11 is configured to send first indication information, where the first indication information is used to indicate a first frequency domain resource; The physical downlink shared channel PDSCH is sent on the 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, and the 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 CDM groups not used to carry data corresponding to the first sub-frequency domain resource, and the second number is the number of DMRS CDM groups not used to carry data corresponding to the second sub-frequency domain resource.

In the above solution, 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 realized, and the overhead for transmitting DMRS is reduced.

Wherein, the transceiving module 11 is further configured 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.

Wherein, the second sub-frequency domain resource is a frequency domain resource in the first frequency domain resource except the first sub-frequency domain resource.

Wherein, the transceiver module 11 is further configured to send second indication information to the terminal device, where the second indication information is used to indicate that other frequency domain resources in the first frequency domain resource except the second frequency domain resource belong to the The frequency domain resource of the first sub-frequency domain resource, wherein the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.

Wherein, 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, and the second sub-indication information is used to indicate the second frequency domain resource One or more first resource block groups in the resources, the one or more first resource block groups belong to the first sub-frequency domain resource, and the second frequency domain resources except the one or more first resource block groups Other resource block groups outside the second frequency domain resource 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, and the one or more second sub-frequency domain resources The resource block group belongs 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-frequency domain resource The 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 to carry data, wherein the pre-DMRS symbols in the second frequency domain resource The number or the number of DMRS CDM groups that are not used to carry data is the first number of resource block groups that belong to the first sub-frequency domain resource, and the number of preceding DMRS symbols in the second frequency domain resource or the number of DMRS CDM groups that are not used to carry data The resource block groups whose quantity is the second quantity belong to the second sub-frequency domain resource.

Wherein, 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 the M belongs to the preset first A number set; the number of resource blocks included in the third frequency domain resource is N, and the N belongs to a preset second number set; 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 include The relationship between the quantities of the resource blocks satisfies the first preset condition.

Wherein, the device further includes: a processing module 12, configured to acquire pattern information, and the pattern information is used to indicate the mapping relationship between multiple patterns and multiple index values, wherein the first frequency domain resource and the multiple index values corresponding to the value, 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, and 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 DMRS CDM groups that are not used to carry data; the processing module 12 is also used to, according to the pattern information, and the second The number of pre-DMRS symbols corresponding to each resource block group in the frequency domain resource or the number of DMRS CDM groups not used to carry data determines a first index value, and the first indication information includes the first index value.

Wherein, the ratio of the number of resource block groups included in the first frequency domain resource to the number of resource block groups included in the third frequency domain resource and the number of resource blocks included in the resource block group satisfy the first corresponding relationship.

Wherein, the transceiving module 11 is further configured to send third information to the terminal device, where the third information is used to indicate the first quantity or the second quantity.

In another possible design, the communication device 10 may correspond to the terminal device in the foregoing method embodiments.

Specifically, the communication device 10 may correspond to the terminal device in the method 600 according to the embodiment of the present application, the communication device 10 may include a module for performing the operations performed by the terminal device in the corresponding method, and the communication device Each unit in 10 is to implement the operations performed by the terminal device in the corresponding method.

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

Specifically, in a possible embodiment, the transceiver module 11 is configured 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 configured to Receive the physical downlink shared channel PDSCH on the first frequency domain resource based on the first indication information, where 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 the 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 pre-DMRS symbols corresponding to the second sub-frequency domain resources The number of symbols, or the first number is the number of DMRS code division multiplexing CDM groups corresponding to the first frequency sub-frequency domain resource that are not used to carry data, and the second number is the number of CDM groups that are not used for carrying data corresponding to the second frequency sub-frequency domain resource. Number of DMRS CDM groups carrying data.

In the above solution, 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 realized, and the overhead for transmitting DMRS is reduced.

Wherein, the transceiving module 11 is further configured 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.

Wherein, the second sub-frequency domain resource is a frequency domain resource in the first frequency domain resource except the first sub-frequency domain resource.

Wherein, the transceiver module 11 is further configured to receive second indication information, and the second indication information is used to indicate that other frequency domain resources in the first frequency domain resources except the second frequency domain resources belong to the first sub-frequency A frequency domain resource of the domain resource, where the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.

Wherein, 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, and the second sub-indication information is used to indicate the second frequency domain resource One or more resource block groups in the resource, the one or more resource block groups belong to the first sub-frequency domain resource, and the other resource block groups in the second frequency domain resource except the one or more resource block groups Belonging 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, and the one or more resource block groups belong to the second sub-frequency domain Resources, 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 that in the second frequency domain resource The number of pre-DMRS symbols corresponding to each resource block group or the number of DMR CDM groups not used to carry data, wherein the number of pre-DMRS symbols in the second frequency domain resource or the number of DMR CDM groups not used to carry data is the first A number of resource block groups belong to the first sub-frequency domain resource, and resource block groups with a second number of pre-DMRS symbols or DMRS CDM groups not used to carry data in the second frequency domain resource belong to the second sub-frequency domain resource. frequency domain resources.

Wherein, 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 the M belongs to the preset first A number set; the number of resource blocks included in the third frequency domain resource is N, and the N belongs to a preset second number set; 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 include The relationship between the quantities of the resource blocks satisfies the first preset condition.

Wherein, the device further includes: a processing module 12, configured to acquire pattern information, and the pattern information is used to indicate the mapping relationship between multiple patterns and multiple index values, wherein the first frequency domain resource and the multiple index values corresponding to the value, 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, and 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 Based on 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 DMR CDM groups not used to carry data is determined.

Wherein, the ratio of the number of resource block groups included in the first frequency domain resource to the number of resource block groups included in the third frequency domain resource and the number of resource blocks included in the resource block group satisfy the first corresponding relationship, and the third The frequency domain resource includes the first frequency domain resource.

Wherein, the transceiving module 11 is further configured to receive third indication information, where the third indication information is used to indicate the first quantity or the second quantity.

FIG. 10 is a schematic diagram of an apparatus 20 for resource allocation provided by an embodiment of the present application.

In a possible design, the apparatus 20 may be a network device, or may be a chip or a chip system on the network device.

In a possible design, the device 20 may be a terminal device, including various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, and various forms of The terminal, mobile station, terminal, user equipment, soft terminal, etc. may also be a chip or a chip system on the terminal equipment.

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 implements the execution of the equipment in the above-mentioned various possible designs in the corresponding methods as shown in Fig. 4 to Fig. 9 step.

Further, the device 20 may also include an input port 23 (ie, an example of a transceiver module) and an output port 24 (ie, another example of a transceiver module). Further, the processor 21, the memory 22, the input port 23 and the output port 24 can communicate with each other through internal connection paths to transmit control and/or data signals. The memory 22 is used to store a computer program, and the processor 21 can be used to call and run the computer program from the memory 22, to control the input port 23 to receive signals, and to control the output port 24 to send signals, so as to complete the terminal equipment or Steps of the radio access network device or UE or base station. The memory 22 can be integrated in the processor 21 or can be set separately from the processor 21 .

Optionally, 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. Wherein, the receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.

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.

As an implementation, the functions of the input port 23 and the output port 34 can be realized by a transceiver circuit or a dedicated chip for transceiver. The processor 21 may be realized by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.

As another implementation manner, it may be considered to use a general-purpose computer to implement the device provided in the embodiment of the present application. The program codes to realize the functions of the processor 21 , the input port 23 and the output port 24 are stored in the memory 22 , and the general processor realizes the functions of the processor 21 , the input port 23 and the output port 24 by executing the codes in the memory 22 .

Wherein, each module or unit in the apparatus 20 may be used to execute each action or processing performed by the random access device (for example, terminal device) in the above method, and here, in order to avoid redundant description, its detailed description is omitted.

For the concepts, explanations, detailed descriptions and other steps involved in the device 20 related to the technical solutions provided by the embodiments of this application, please refer to the descriptions of these contents in the foregoing methods or other embodiments, and will not be repeated here.

It should be understood that in the embodiment of the present application, the processor may be a central processing unit (CPU, central processing unit), and the processor may also be other general-purpose processors, digital signal processors (DSP, digital signal processor), application specific integrated circuits ( Application specific integrated circuit (ASIC), off-the-shelf programmable gate array (field programmable gate array, 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 the processor may be any conventional processor, or the like.

The 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 the terminal device in the above method embodiments are stored.

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 embodiments.

The 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 the terminal device in the above method embodiments are stored.

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 embodiments.

It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), Double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) and direct memory Bus random access memory (directrambus RAM, DR RAM).

The above-mentioned embodiments may be implemented in whole or in part by software, hardware, firmware or other arbitrary combinations. When implemented using software, the above-described embodiments may be implemented in whole or in part in the form of computer program products. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on the computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center that includes one or more sets of available media. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media. The semiconductor media may be a solid state drive.

It should be understood that the term "and/or" in this article is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and/or B may mean: A exists alone, and A and B exist at the same time , there are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation.

Those of ordinary skill in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented by hardware or software depends on the specific application and design constraints of the technical solution. A skilled artisan may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, 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 only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may also be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. If the functions described are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: various media capable of storing program codes such as U disks, mobile hard disks, ROMs, RAMs, magnetic disks or optical disks.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (21)

1. A method for resource allocation, comprising: 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, 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 resources that are not used to carry data, and the second number is the number of CDM groups that are not used to carry data corresponding to the second sub-frequency domain resources. The number of DMRS CDM groups for the data. 2. The method according to claim 1, characterized in that the method further comprises: receiving second indication information, where the second indication information is used to indicate the first sub-frequency domain resources in the first frequency domain resources. 3. The method according to claim 1 or 2, wherein the second sub-frequency domain resources are frequency domain resources in the first frequency domain resources other than the first sub-frequency domain resources. 4. The method according to claim 1, wherein the method further comprises: receiving second indication information, 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 resource is a predetermined frequency domain resource in the first frequency domain resource. 5. The method of claim 4, wherein, 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 the second resource block groups other than the one or more resource block groups in the frequency domain resource 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 the second resource block groups other than the one or more resource block groups in the frequency domain resource 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 to carry data, wherein the second frequency domain The number of pre-DMRS symbols in the resource or the number of DMR CDM groups not used to carry data is the first number of resource block groups belonging to the first sub-frequency domain resource, and the number of pre-DMRS symbols in the second frequency domain resource is or not Resource block groups whose number of DMRS CDM groups carrying data is a second number belong to the second sub-frequency domain resources. 6. The method according to claim 4 or 5, wherein 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 resource is not M, and the M belongs to a preset first number set; The number of resource blocks included in the third frequency domain resource is N, and the N belongs to a preset second number set; A 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 a first preset condition. 7. The method according to claim 4 or 6, wherein the method further comprises: Get pattern information, The pattern information is used to indicate a mapping relationship between multiple patterns and multiple index values, where 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 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, determine the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or not used to carry data The number of DMRSCDM groups. 8. The method according to any one of claims 1 to 7, characterized in that, The ratio of the number of resource block groups included in the first frequency domain resource to the number of resource block groups included in the third frequency domain resource and the number of resource blocks included in the resource block group satisfy a first correspondence relationship, and the first The three frequency domain resources include the first frequency domain resource. 9. The method according to any one of claims 1 to 8, further comprising: Receive third indication information, where the third indication information is used to indicate the first quantity or the second quantity. 10. A method for signal transmission, comprising: 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 resource; in, The first number of PDSCHs is different from the second number of PDSCHs, and 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 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 resources that are not used to carry data, and the second number is the number of CDM groups that are not used to carry data corresponding to the second sub-frequency domain resources. The number of DMRS CDM groups for the data. 11. The method of claim 10, further comprising: Sending second indication information to the terminal device, where the second information is used to indicate the first sub-frequency domain resources in the first frequency domain resources. 12. The method according to claim 10 or 11, wherein the second sub-frequency domain resource is a frequency domain resource in the first frequency domain resource other than the first sub-frequency domain resource. 13. The method of claim 10, further comprising: Sending second indication information to the terminal device, where the second indication information is used to indicate that other frequency domain resources in the first frequency domain resource except the second frequency domain resource belong to the first sub-frequency domain resource frequency domain resource, wherein the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource. 14. The method of claim 13, wherein, 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, and the one or more first resource block groups belong to the first sub-frequency domain resource, 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, and the one or more second resource block groups belong to the second sub-frequency domain resource, resource block groups other than the one or more second resource block groups in the second frequency domain resource 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 to carry data, wherein the second frequency domain The number of pre-DMRS symbols in the resource or the number of DMR CDM groups not used to carry data is the first number of resource block groups belonging to the first sub-frequency domain resource, and the number of pre-DMRS symbols in the second frequency domain resource is or not Resource block groups whose number of DMRS CDM groups carrying data is a second number belong to the second sub-frequency domain resource. 15. The method according to claim 13 or 14, wherein 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 resource is not M, and the M belongs to a preset first number set; The number of resource blocks included in the third frequency domain resource is N, and the N belongs to a preset second number set; A 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 a first preset condition. 16. The method according to claim 13 or 15, further comprising: Get pattern information, The pattern information is used to indicate a mapping relationship between multiple patterns and multiple index values, where 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 not used to carry data; According to the pattern information, 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 determines a first index value, and the first indication information Include the first index value. 17. A method according to any one of claims 10 to 16, wherein The ratio of the number of resource block groups included in the first frequency domain resource to the number of resource block groups included in the third frequency domain resource and the number of resource blocks included in the resource block group satisfy a first correspondence relationship. 18. The method according to any one of claims 10 to 17, further comprising: 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 it comprises: 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 that the communication device executes the communication method according to any one of claims 1 to 9, or executes any one of claims 10 to 18 the communication method described. 20. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is run on a computer, the computer is made to execute the The communication method described in any one, or execute the communication method described in any one of claims 10-18. 21. A system on a chip, characterized by comprising: a processor, configured to call and run a computer program from a memory, so that the communication device installed with the system on a chip executes the program described in any one of claims 1 to 9. communication method, or execute the communication method according to any one of claims 10 to 18.

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