CN115484675A

CN115484675A - Resource allocation method and device

Info

Publication number: CN115484675A
Application number: CN202110605573.7A
Authority: CN
Inventors: 宣一荻; 谢信乾; 郭志恒
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-12-16
Also published as: WO2022252954A1

Abstract

The application provides a method and a device for resource allocation, wherein the method comprises the following steps: the network equipment indicates a first frequency domain resource to the terminal equipment, and the terminal equipment receives a physical downlink shared channel based on the first frequency domain resource, wherein the first frequency domain resource comprises two parts of sub-frequency domain resources, the two parts of sub-frequency domain resources respectively correspond to different numbers of pre-demodulation reference signal (DMRS) symbols, or the two parts of sub-frequency domain resources respectively correspond to different numbers of DMRS Code Division Multiplexing (CDM) groups which are not used for carrying data. According to the method and the device, the number of different preposed DMRS symbols and/or the number of DMRS CDM groups which are not used for carrying data are configured on the scheduled frequency domain resources according to communication requirements, so that flexible resource configuration on the frequency domain is realized, and transmission resources are saved.

Description

Resource allocation method and device

Technical Field

The present application relates to the field of communications, and in particular, to a method and an apparatus for resource configuration.

Background

Currently, when a network device communicates with a terminal device, the demodulation reference signal (DMRS) configurations of all scheduling resource blocks of the terminal device are the same, where the DMRS configurations include the number of pre-DMRS symbols or the number of Code Division Multiplexing (CDM) groups that are not used for carrying data. For a frequency selective fading scenario, when a terminal device performs spatial multiplexing with other terminal devices on different subbands (one or more Resource Blocks (RBs)), the number of terminal devices on different subbands may be different, and thus the number of spatial layers transmitted simultaneously on different subbands is different. If the DMRS configurations of all scheduling resource blocks of the terminal device are the same, the network device may uniformly configure the number of the pre-DMRS symbols and the number of the DMRS CDM groups not used for carrying data for all subbands according to the number of the pre-DMRS symbols and the number of the DMRS CDM groups not used for carrying data required for the subband with the largest number of transmission spatial layers, and for the subbands with the smaller number of transmission spatial layers, the redundant DMRS or the DMRS CDM group not used for carrying data may occupy resources for data transmission, which causes waste of transmission resources and affects communication efficiency.

Disclosure of Invention

The application provides a method and a device for resource allocation, which can realize flexible resource allocation in a frequency domain by allocating different numbers of preposed DMRS symbols or DMRS CDM groups which are not used for carrying data on scheduled frequency domain resources according to communication requirements, thereby saving transmission resources.

In a first aspect, a method for resource configuration is provided, including: receiving first indication information from a network device, wherein the first indication information is used for indicating 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 a first number of the PDSCH is different from a second number of the PDSCH, the first frequency domain resource includes a first sub-frequency domain resource and a second sub-frequency domain resource, the first number is the number of DMRS symbols corresponding to the first sub-frequency domain resource, the second number is the number of 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 and not used for carrying data, and the second number is the number of DMRS Code Division Multiplexing (CDM) groups corresponding to the second sub-frequency domain resource and not used for carrying data.

According to the scheme, the number of different pre-DMRS symbols is configured on the scheduled frequency domain resources according to the communication requirement, so that the flexible DMRS resource configuration on the frequency domain is realized, the resource overhead of transmitting the DMRS is reduced, and the utilization rate of the resources is improved.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: receiving second indication information, the second indication information indicating the first sub-frequency-domain resource in the first frequency-domain resource.

With reference to the first aspect, in certain implementations of the first aspect, the second sub-frequency-domain resources are frequency-domain resources of the first frequency-domain resources other than the first sub-frequency-domain resources.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: and receiving second indication information, where the second indication information is used to indicate a frequency domain resource belonging to the first sub-frequency domain resource in the other frequency domain resources except the second frequency domain resource in the first frequency domain resource, where the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.

In the above scheme, 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, and compared with the situation that there is no predetermined frequency domain resource, the resources that need to be indicated are reduced, the size of the signaling that needs to be used can also be reduced, the signaling overhead can be reduced, and the resources can be saved.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: receiving second indication information, where the second indication information is used to indicate one or more resource block groups in the first frequency domain resource except for a second frequency domain resource, where the one or more resource block groups belong to the first sub-frequency domain resource, and the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.

According to the scheme, 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 the resource except the predetermined frequency domain resource, compared with the situation that the predetermined frequency domain resource does not exist, the resource needing to be indicated is reduced, the size of the signaling needing to be used can also be reduced, the signaling overhead can be reduced, and the resource is saved.

With reference to the first aspect, in certain implementations of the first aspect, the first indication information includes first sub-indication information and second sub-indication information, the first sub-indication information is used to indicate the first frequency domain resource, the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, the one or more resource block groups belong to the first sub-frequency domain resource, other resource block groups in the second frequency domain resource except the one or more resource block groups belong to the second sub-frequency domain resource, or the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, the one or more resource block groups belong to the second sub-frequency domain resource, other resource block groups in the second frequency domain resource except the one or more resource block groups belong to the first sub-frequency domain resource, or the second sub-indication information is used to indicate the number of pre-symbols corresponding to each resource block group in the second frequency domain resource block group or the number of dmdm groups not used for carrying data, where the number of dmdm symbols in the second frequency domain resource block group does not belong to the DMRS data group, or the number of DMRS data is not used in the second frequency domain resource block group.

With reference to the first aspect, in certain implementations of the first aspect, the first frequency-domain resources belong to third frequency-domain resources, and the third frequency-domain resources satisfy at least one of: 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; the relation 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.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: obtaining pattern information, where the pattern information is used to indicate a mapping relationship between a plurality of patterns and a plurality of index values, where the first frequency domain resource corresponds to the plurality of index values, or the pattern information is used to indicate a mapping relationship between a plurality of patterns and a plurality of index values, and a corresponding relationship between the first frequency domain resource and the plurality of 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 that are not used for carrying data; the first indication information includes a first index value, and the number of pre-DMRS symbols or the number of dmrcsdm groups not used for carrying data corresponding to each resource block group in the second frequency domain resource is determined according to a pattern corresponding to the first index value.

With reference to the first aspect, in certain implementation manners of the first aspect, a 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 corresponding relationship, and the third frequency domain resource includes the first frequency domain resource.

With reference to the first aspect, in certain implementation manners of the first aspect, a ratio of a number of resource block groups included in the first frequency domain resource to a number of resource block groups included in a third frequency domain resource and a number of resource blocks included in the resource block groups satisfy a first corresponding relationship, the third frequency domain resource includes the first frequency domain resource, and the number of resource blocks included in the resource block groups is determined according to the first corresponding relationship.

According to the scheme, according to the actual resource scheduling situation, under the condition that the length of the indication information for scheduling resources is not changed, the indication granularity is dynamically changed, namely the size of the resource block group is dynamically determined, the indication and scheduling with smaller granularity can be realized, the expense for transmitting the DMRS is saved, the number of filling bits in the indication information is reduced, and the waste of the resources is further reduced.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: third indication information is received, wherein the third indication information is used for indicating the first number or the second number.

With reference to the first aspect, in certain implementations of the first aspect, the number of resource block groups comprised by the second frequency-domain resource is determined based on the number of resource block groups comprised by the first frequency-domain resource.

With reference to the first aspect, in certain implementations of the first aspect, the second frequency-domain resource includes a number of resource block groups that is less than or equal to a second threshold.

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

According to the scheme, the DMRS ports are respectively configured on the two parts of frequency domain resources which bear the transmission signals of the network equipment and the terminal equipment and are different in the number of the preposed DMRS symbols configured by the network equipment, so that the waste of the DMRS port resources is avoided, and the flexibility of resource scheduling is improved.

In a second aspect, a method for signal transmission is provided, including: transmitting first indication information, wherein the first indication information is used for indicating first frequency domain resources; sending a Physical Downlink Shared Channel (PDSCH) on the first frequency domain resource; the first number of the PDSCH is different from the second number of the PDSCH, the first frequency-domain resource includes a first sub-frequency-domain resource and a second sub-frequency-domain resource, the first number is the number of DMRS symbols of a preamble demodulation reference signal corresponding to the first sub-frequency-domain resource, the second number is the number of DMRS symbols corresponding to the second sub-frequency-domain resource, or the first number is the number of DMRS Code Division Multiplexing (CDM) groups not used for carrying data corresponding to the first sub-frequency-domain resource, and the second number is the number of DMRS CDM groups not used for carrying data corresponding to the second sub-frequency-domain resource.

According to the scheme, for the scheduled frequency domain resources, different resources are configured with different numbers of the pre-DMRS symbols according to communication requirements, so that flexible DMRS resource configuration in the frequency domain is realized, and the overhead for transmitting the DMRS is reduced.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: and sending second indication information to the terminal equipment, wherein the second information is used for indicating the first sub frequency domain resource in the first frequency domain resource.

With reference to the second aspect, in certain implementations of the second aspect, the second sub-frequency-domain resources are frequency-domain resources of the first frequency-domain resources other than the first sub-frequency-domain resources.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: and sending second indication information to the terminal device, where the second indication information is used to indicate a frequency domain resource belonging to the first sub-frequency domain resource in other frequency domain resources except for a second frequency domain resource in the first frequency domain resource, where the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.

According to the scheme, in the frequency domain resource carrying the downlink signal sent by the network equipment to the terminal equipment, the second indication information only needs to indicate the resource except the predetermined frequency domain resource, so that the signaling overhead is reduced, and the resource is saved.

With reference to the second aspect, in some implementations of the second aspect, the first indication information includes first sub-indication information and second sub-indication information, the first sub-indication information is used to indicate the first frequency domain resource, the second sub-indication information is used to indicate one or more first resource block groups in the second frequency domain resource, the one or more first resource block groups belong to the first sub-frequency domain resource, other resource block groups than the one or more first resource block groups in 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, the one or more second resource block groups belong to the second sub-frequency domain resource, other resource block groups in the second frequency domain resource except the one or more second resource block groups belong to the first sub-frequency domain resource, or the second sub-indication information is used to indicate that the number of corresponding preamble symbols or the number of preamble symbols in each of the second frequency domain resource group does not belong to DMRS data or DMRS data is not used for carrying the second DMRS data block group.

With reference to the second aspect, in certain implementations of the second aspect, the first frequency-domain resources belong to third frequency-domain resources, and the third frequency-domain resources satisfy at least one of: 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; the relation 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.

According to the scheme, the first indication information can be used for indicating the predetermined frequency domain resources in the scheduled frequency domain resources by restricting the first frequency domain resources and/or the third frequency domain resources to meet a certain condition, so that the signaling overhead is further reduced.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: obtaining pattern information, where the pattern information is used to indicate a mapping relationship between a plurality of patterns and a plurality of index values, where the first frequency domain resource corresponds to the plurality of index values, or the pattern information is used to indicate a mapping relationship between a plurality of patterns and a plurality of index values, and a corresponding relationship between the first frequency domain resource and the plurality of 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 that are not used for carrying data; and determining a first index value according to the pattern information and the number of the preamble DMRS symbols or the number of the DMRSCDM groups which are not used for carrying data and correspond to each resource block group in the second frequency domain resource, wherein the first indication information comprises the first index value.

With reference to the second aspect, in certain implementations of the second aspect, a 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 groups satisfy a first corresponding relationship.

According to the scheme, according to the actual resource scheduling situation, under the condition that the length of the indication information for scheduling the resources is not changed, the indication granularity is dynamically changed, namely the size of the resource block group is dynamically determined, the indication and scheduling with smaller granularity can be realized, the expense for transmitting the DMRS is saved, the number of filling bits in the indication information is reduced, and the resource waste is further reduced.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: the network device sends third information to the terminal device, wherein the third information is used for indicating the first number or the second number.

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

With reference to the second aspect, in certain implementations of the second aspect, the second frequency domain resource includes a number of resource block groups that is less than or equal to a second threshold.

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

According to the scheme, the DMRS ports are respectively configured on the two parts of frequency domain resources with different numbers of the preposed DMRS symbols configured in the frequency domain resources for carrying the transmission signals of the network equipment and the terminal equipment, so that the waste of the DMRS port resources is avoided, and the flexibility of resource scheduling is improved.

In a third aspect, a communication device is provided, which is configured to implement the functions of the terminal in the method provided in the first aspect. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

With reference to the third aspect, in certain implementations of the third aspect, the communication device 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 a first number of the PDSCH is different from a second number of the PDSCH, the first frequency domain resource includes a first sub-frequency domain resource and a second sub-frequency domain resource, the first number is the number of DMRS symbols corresponding to the first sub-frequency domain resource, the second number is the number of DMRS symbols corresponding to the second sub-frequency domain resource, or the first number is the number of DMRS code division multiplexing, CDM, groups not used for carrying data corresponding to the first sub-frequency domain resource, and the second number is the number of DMRS CDM groups not used for carrying data corresponding to the second sub-frequency domain resource.

According to the scheme, the number of different pre-DMRS symbols is configured on the scheduled frequency domain resources according to the communication requirement, so that flexible resource configuration on the frequency domain is realized, and the overhead for transmitting the DMRS is reduced.

With reference to the third aspect, in certain 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 the first sub-frequency-domain resource in the first frequency-domain resource.

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

With reference to the third aspect, in certain 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 a frequency domain resource belonging to the first sub-frequency domain resource in other frequency domain resources except for a second frequency domain resource in the first frequency domain resource, where the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.

With reference to the third aspect, in certain implementations of the third aspect, the first indication information includes first sub-indication information and second sub-indication information, the first sub-indication information is used to indicate the first frequency domain resource, the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, the one or more resource block groups belong to the first sub-frequency domain resource, other resource block groups in the second frequency domain resource except the one or more resource block groups belong to the second sub-frequency domain resource, or the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, the one or more resource block groups belong to the second sub-frequency domain resource, 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 the number of pre-symbols corresponding to each resource block group in the second frequency domain resource block group or the number of dmdm groups not used for carrying data in the second frequency domain resource block group belongs to the second DMRS data group, where the number of pre-symbols in the second frequency domain resource block group does not belong to the DMRS dm group.

With reference to the third aspect, in certain implementations of the third aspect, the first frequency-domain resources belong to third frequency-domain resources, and the third frequency-domain resources satisfy at least one of: 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; the relation between the number of the resource blocks included in the third frequency domain resource and the number of the resource blocks included in the first resource block group satisfies a first preset condition.

With reference to the third aspect, in certain implementations of the third aspect, the apparatus further includes: a processing module, configured to obtain pattern information, where 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, 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 rscdmdm groups that are not used for carrying data; the processing module is further configured to determine, according to a pattern corresponding to the first index value, the number of pre-DMRS symbols or the number of DMRSCDM groups that are not used for carrying data, corresponding to each resource block group in the second frequency domain resource.

With reference to the third aspect, in certain implementations of the third aspect, a ratio of the number of resource block groups included in the first frequency domain resource to the number of resource block groups included in a third frequency domain resource to the number of resource blocks included in the resource block group satisfies a first corresponding relationship, and the third frequency domain resource includes the first frequency domain resource.

With reference to the third aspect, in some implementations 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 number or the second number.

In a fourth aspect, a communication apparatus 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 transceiver module is further configured to send a physical downlink shared channel PDSCH on the first frequency domain resource; the first number of the PDSCH is different from the second number of the PDSCH, the first frequency-domain resource includes a first sub-frequency-domain resource and a second sub-frequency-domain resource, the first number is the number of DMRS symbols of a preamble demodulation reference signal corresponding to the first sub-frequency-domain resource, the second number is the number of DMRS symbols corresponding to the second sub-frequency-domain resource, or the first number is the number of DMRS Code Division Multiplexing (CDM) groups not used for carrying data corresponding to the first sub-frequency-domain resource, and the second number is the number of DMRS CDM groups not used for carrying data corresponding to the second sub-frequency-domain resource.

With reference to the fourth aspect, in some implementations 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 the first sub-frequency-domain resource in the first frequency-domain resource.

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

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 a frequency domain resource belonging to the first sub-frequency domain resource in other frequency domain resources except for a second frequency domain resource in the first frequency domain resource, where 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 implementations of the fourth aspect, the first indication information includes first sub-indication information and second sub-indication information, the first sub-indication information is used to indicate the first frequency domain resources, the second sub-indication information is used to indicate one or more first resource block groups in the second frequency domain resources, the one or more first resource block groups belong to the first sub-frequency domain resources, other resource block groups in the second frequency domain resources except the one or more first resource block groups belong to the second sub-frequency domain resources, or the second sub-indication information is used to indicate one or more second resource block groups in the second frequency domain resources, the one or more second resource block groups belong to the second sub-frequency domain resources, other resource block groups in the second frequency domain resources except the one or more second resource block groups belong to the first sub-frequency domain resources, or the second sub-indication information is used to indicate that the corresponding number of preamble symbols in each of the second frequency domain resources or the number of rscs symbols in the second frequency domain resources do not belong to the dm symbol group, or the number of DMRS symbols in the DMRS data-group does not belong to the second sub-frequency domain resources, or the DMRS data group does not belong to the dm symbol group, or the DMRS data carrying the second number not belong to the second sub-frequency domain resources.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first frequency-domain resources belong to third frequency-domain resources, and the third frequency-domain resources satisfy at least one of: 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; the relation 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.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the apparatus further includes: a processing module, configured to obtain pattern information, where 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, 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 rscdmdm groups that are not used for carrying data; the processing module is further configured to determine a first index value according to the pattern information and the number of preamble DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups not used for carrying data, where the first indication information includes the first index value.

With reference to the fourth aspect, in some implementations of the fourth aspect, a 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 groups satisfy a first corresponding relationship.

With reference to the fourth aspect, in some implementations 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 number or the second number.

In a fifth aspect, a communication apparatus is provided, including: a processor and a memory; the memory for storing a computer program; the processor is configured to execute the computer program stored in the memory to enable the communication apparatus to execute the communication method of the first aspect or the second aspect.

A sixth aspect provides a computer-readable storage medium having stored thereon a computer program which, when run on a computer, causes the computer to perform the communication method of the first or second aspect.

In a seventh aspect, a chip system is provided, including: a processor for calling and running the computer program from the memory so that the communication device on which the system-on-chip is installed performs the communication method of the first aspect or the second aspect.

In an eighth aspect, the present application provides a computer program product comprising a computer program that, when run on a computer, causes the method performed by the terminal device in the first aspect described above to be performed, or causes the method performed by the network device in the second aspect described above to be performed.

Drawings

Fig. 1 is a diagram illustrating an example of a DMRS pattern in a 5G system.

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

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

Fig. 4 illustrates resource waste due to the same number of preamble DMRS symbols configured in the frequency domain.

Fig. 5 illustrates resource waste due to the same number of DMRS CDM groups not used for carrying data being configured in the frequency domain.

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

Fig. 7 is a diagram illustrating an example of the 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 apparatus for information transmission according to an embodiment of the present application.

Fig. 10 is a schematic diagram of an apparatus 20 for sending information according to an embodiment of the present application.

Detailed Description

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

As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on 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 a component. 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 2 or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with another component in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).

1) A terminal, also called User Equipment (UE), a Mobile Station (MS), or a Mobile Terminal (MT), etc., is a device that provides voice/data connectivity to a user, such as a handheld device with a wireless connection function, or a vehicle-mounted device, etc. Currently, some examples of terminals are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in city (smart city), a wireless terminal in smart home (smart home), and the like.

2) A network device is a device in a wireless network, such as a Radio Access Network (RAN) node that accesses a terminal to the wireless network. Currently, some examples of RAN nodes are: a gbb, a Transmission Reception Point (TRP), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), or a wireless fidelity (Wifi) Access Point (AP), etc. In one network configuration, a network device may comprise a Centralized Unit (CU) node, or a Distributed Unit (DU) node, or a RAN device comprising a CU node and a DU node.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a global system for mobile communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a long term evolution (long term evolution, LTE) system, a LTE Frequency Division Duplex (FDD) system, a LTE Time Division Duplex (TDD) system, a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication system, a 5G system, or a New Radio (NR) system, etc.

Before describing the embodiments of the present application, a few concepts related to the embodiments of the present application will be briefly described.

Fixed Wireless Access (FWA) networks relying on Long Term Evolution (LTE) and 5G NR (new radio, NR) technologies provide wireless or limited lan access to end users through a Customer Premise Equipment (CPE) located indoors or outdoors. The CPE can provide various services such as internet, fixed telephone, television, smart home and the like for the final user. For the FWA scenario, the downlink communication from the network device to the CPE is usually mainly transmission of large data packets, and the base station needs to schedule more spectrum resources for the CPE to meet the rate requirement. In particular, for an indoor FWA scenario, since there are many indoor obstacles and multipath effect is severe, there is a strong frequency selective fading of the channel.

In a 5G new radio interface (NR) system and a Long Term Evolution (LTE) system, an Orthogonal Frequency Division Multiple Access (OFDMA) method is generally used as a multiple access method. The ofdma scheme is mainly characterized in that transmission resources are divided into mutually orthogonal time-frequency Resource Elements (REs), signals transmitted by a transmitting end are all carried on the REs and transmitted to a receiving end, and the different REs are mutually orthogonal, so that the receiving end can independently receive the signals transmitted by each RE. In consideration of the fading characteristics of the wireless channel, the signal carried on the RE will be distorted after passing through the channel, and the channel distortion is generally referred to as channel coefficient. In order to recover a received signal, a receiving end needs to estimate a channel coefficient, a process of obtaining channel information by the receiving end may also be referred to as channel estimation, and in the prior art, a scheme of performing channel estimation based on a reference signal is generally adopted, that is, a transmitting end transmits a known signal on a specific RE, and the receiving end estimates the channel coefficient according to the received signal and the known signal, interpolates the channel coefficients on other REs according to the channel coefficient obtained by the estimation, and further performs reception and demodulation on a data signal.

In the existing wireless communication system, a base station is equipped with multiple antennas to implement spatial multiplexing transmission by using multiple-input multiple-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 to be mapped to a different antenna port for transmission. Considering that channel coefficients from different antenna ports to terminal devices are different, in order for a receiving end to obtain information transmitted on a plurality of space layers, it is necessary to estimate the channel coefficient between each antenna port and the terminal, so that it is necessary to configure different DMRSs for each antenna port, and DMRSs corresponding to different antenna ports may be multiplexed in time division, frequency division, code division, and other manners. Illustratively, as shown in fig. 1, the total number of DMRS ports is 6, and the number of cdm groups is 3. Wherein, the horizontal direction represents a time domain, the vertical direction represents a frequency domain, each small square represents an RE, wherein

DMRS ports

0 and 1 are multiplexed by orthogonal codes, so the REs corresponding to the two ports are also called a Code Division Multiplexing (CDM) group.

1. Subcarrier: in a communication system using Orthogonal Frequency Division Multiplexing (OFDM) technology, a frequency domain resource is divided into a plurality of sub-resources, and each sub-resource in the frequency domain may be referred to as a sub-carrier. The subcarriers may also be understood as the smallest granularity of frequency domain resources. The OFDM technique is a multi-carrier modulation technique.

2. Subcarrier spacing: in a communication system using the OFDM technique, the values of the intervals between the center positions or peak positions of two subcarriers adjacent to each other in the frequency domain. For example, the subcarrier spacing in the LTE system is 15kHz, the subcarrier spacing in the NR system in the 5G system may be 15kHz, or 30kHz, or 60kHz, or 120kHz, or the like.

3. Resource Block (RB): n subcarriers consecutive in the frequency domain may be referred to as one resource block. For example, one resource block in the LTE system includes 12 subcarriers, and one resource block in the NR system in 5G also includes 12 subcarriers. As the communication system evolves, the number of subcarriers included in one resource block may be other values.

4. Time unit: the time unit is a time domain concept or a unit in a time domain, and may be one or more subframes, one or more slots, or one or more OFDM time symbols, where, for example, in a 5G NR system, the slot length is 1ms, and the slot length corresponding to a subcarrier interval of 30khz is 0.5ms. An OFDM time symbol may also be referred to as a symbol for short, which is a time unit in the OFDM system with the symbol as the minimum in the time domain.

5. Time-frequency resource unit: the minimum time-frequency resource granularity in the OFDM system is an OFDM symbol in a time domain and a subcarrier in a frequency domain.

6. Sub-band: one sub-band includes one or more resource blocks in the frequency domain, or one sub-band 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 sub-band may be the same as or different from that of one resource block group. A subband may also be understood as a resource block group when a subband is the same size as a resource block group.

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

8. Spatial layer: in an existing wireless communication system, a base station is equipped with multiple antennas to implement spatial multiplexing transmission by using MIMO technology, that is, multiple different data streams are transmitted on the same time-frequency resource, each unrelated data stream is 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 constitute a Resource Block Group (RBG). The size of the RBG is configured in the 5G NR through a high-layer parameter. Note that the size of an RBG mentioned in the present application is understood as the number of resource blocks included in the RBG, and the size of a certain frequency domain resource mentioned in the present application is also understood as the number of RBs included in the frequency domain resource. A resource block group included in a certain frequency domain resource, or a resource block group or a first resource block group in a first resource block group included in a certain frequency domain resource, may be understood as a unit resource block group in the frequency domain resource.

10. Partial Bandwidth (BWP): which may also be referred to as a bandwidth portion, a terminal device may be configured with a portion of the frequency domain resources in the carrier for data transmission in the 5G NR, without requiring all of the frequency domain resources in the carrier.

11. type0 and type1 resource allocation

The downlink data channel supports two types of frequency domain resource allocation: type0 type and type1 type. Wherein, type0 type is discontinuous frequency domain resource allocation, and type1 type is continuous frequency domain resource allocation. In order to support the flexibility of the location and number of the scheduled frequency domain resources, downlink Control Information (DCI) can dynamically indicate the frequency domain resource allocation type used by the scheduled PDSCH transmission (when the parameter resource allocation in the higher layer signaling PDSCH-configuration is set to dynamic), when the highest bit in the DCI intermediate frequency domain resource allocation information field 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 by the higher layer signaling parameter resource allocation.

Specifically, the type0 type indicates a resource block group allocated for PDSCH use in BWP through a bitmap or bitmap, tyThe pe1 type indicates consecutive numbered resource blocks allocated for PDSCH in BWP by RIV. When interleaving mapping is employed, resource blocks may be understood as consecutively numbered virtual resource blocks. RIV is used to indicate the starting resource Block number RB allocated to the UE PDSCH _start And length L of allocated consecutive resource blocks _RBs . In the existing 3GPP standard TS 38.214, the calculation formula of RIV is as follows:

if it is used

Then

If not, then,

12. DMRS: the demodulation reference signal is a reference signal used for recovering a received signal, the DMRS is a signal known to both a sending end and a receiving end, the sending end transmits the DMRS and data to the receiving end through the same port and a wireless channel, and the receiving end obtains a 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 sent data. In the 5G NR system, considering that channel coefficients from different antenna ports to a terminal are different, in order for a receiving end to obtain information transmitted on multiple spatial layers, it is necessary to estimate a channel coefficient between each antenna port and the terminal, so that different DMRSs need to be configured for each antenna port, and the DMRSs corresponding to different antenna ports may be multiplexed in time division, frequency division, code division, and other manners.

The DMRS includes a preamble DMRS, which is generally configured in front of a Physical Downlink Shared Channel (PDSCH) in a time slot, and an additional DMRS. Currently, a 1-symbol preamble DMRS or a 2-symbol preamble DMRS may be configured in the time domain. Wherein, the 2-symbol preamble DMRS can support more DMRS ports to transmit more spatial layers. The 5G NR system configures the maximum number of prepositive symbols of the DMRS through a high-layer parameter maxlength, wherein the maxlength can be 1 or 2, when the maxlength is configured to be 1, the maxlength indicates that the prepositive DMRS occupies 1 symbol at most, and when the maxlength is 2, the maxlength indicates that the prepositive DMRS occupies 2 symbols at most. When maxlength is configured to be 2, the network device dynamically indicates, through an antenna port field in Downlink Control Information (DCI), the number of symbols occupied by the pre-DMRS of each time slot, that is, the network device determines, through a number of front-load symbols indicated by the antenna port field, the number of symbols occupied by the pre-DMRS. Exemplarily, fig. 2 shows two slots configured with different numbers of preamble DMRS symbols. As shown in fig. 2, in slot 1, DCI indicates slot 1 and configures a 2-symbol pre-DMRS because of a high number of spatial layers, and in slot 2, DCI indicates slot 2 and configures a 1-symbol pre-DMRS because of a low number of spatial layers.

NR supports two DMRS pilot types, DMRS Type1 Type and DMRS Type2 Type. The DMRS Type1 Type comprises two CDM groups, and when a single symbol DMRS is adopted, at most 4 DMRS ports are supported, wherein 2 DMRS ports are supported inside each CDM group in a frequency domain code division multiplexing mode for multiplexing; when the dual-symbol DMRS is adopted, at most 8 DMRS ports are supported, wherein 4 DMRS ports are supported in each CDM group in a time domain and frequency domain code division multiplexing mode. The DMRS Type2 Type comprises 3 CDM groups, when a single symbol DMRS is adopted, at most 6 DMRS ports are supported, and 2 DMRS port multiplexing is supported in each CDM group in a frequency domain code division multiplexing mode; when the dual-symbol DMRS is adopted, at most 12 DMRS ports are supported, and 4 DMRS ports are supported in each CDM group in a time domain and frequency domain code division multiplexing mode.

Meanwhile, in the 5G NR system, a CDM group not used for transmission of DMRS may be used for transmission of data signals, and thus, the network device may also inform the UE of which DMRS ports in the CDM group are used by other users through the "number of DMRS CDM groups not used for carrying data" indicated by the "antenna port" field in DCI. Therefore, the terminal can avoid the RE mapped with the reference signal of the terminal and other UEs when mapping data. When the indicated number of the DMRS CDM groups not used for carrying data is 1, it is indicated that only CDM group 0 is used for carrying DMRSs, and REs corresponding to other CDM groups are used for transmitting data. When the number of DMRS CDM groups not used for carrying data is 2, it is indicated that

only CDM groups

0 and 1 are used for carrying DMRSs, and REs corresponding to other CDM groups are used for transmitting data. When the CDM group of DMRS not used to carry data is 3, it is indicated that

CDM groups

0,1, 2 are used to carry DMRS. Exemplarily, fig. 3 shows two slots different in the number of DMRS CDM groups configured not to carry data. As shown in fig. 3, in slot 1, DCI indicates that UE0 has 2 CDM groups not used for transmitting data, i.e.,

CDM group

0 and 1,cdm group 0 are used for transmitting DMRS of UE0, while CDM group 1 is used for transmitting DMRS of other user (UE 1), and in slot 2, DCI indicates that UE0 has 1 CDM group not used for transmitting data, i.e., CDM group 0 transmits DMRS of UE 0.

It should be understood that the number of DMRS code division multiplexing, CDM, groups not used to carry data may also be understood as the number of CDM groups used to carry DMRS. In the NR standard, resources that can be used for a Type1 DMRS may be divided into 2 CDM groups, resources that can be used for carrying a Type2 DMRS may be divided into 3 CDM groups, and a CDM group used for carrying a DMRS and a CDM group used for carrying data may be determined by the number of DMRS CDM groups that are not used for carrying data. For example, taking a DMRS of Type2 as an example, resources capable of carrying the DMRS are divided into 3 CDM groups, i.e.,

CDM groups

0,1, and 2, and when the number of CDM groups not used for carrying data is 3, i.e., only

CDM groups

0,1, and 2 are used for carrying the DMRS, any CDM group is not used for carrying data; when the number of CDM 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.

The following describes, with reference to fig. 4 and fig. 5, a case of DMRS configuration currently adopted when a network device and a terminal device communicate with each other.

At present, when a network device communicates with a terminal device, DMRS configurations of all scheduling resource blocks of the terminal device are the same, where the DMRS configurations include the number of pre-DMRS symbols, the number of DMRS CDM groups not used for carrying data, and the scheduling resource blocks may be understood as resource blocks allocated to a scheduled UE for data transmission. For a frequency selective fading scenario, when sub-band pairing is adopted, the terminal device performs space division multiplexing with other terminal devices on different sub-bands (one or multiple RBs), and the number of terminal devices on different sub-bands may be different, so that the number of spatial layers transmitted simultaneously on different sub-bands is different.

If the current DMRS configuration mode is adopted, that is, the network device may uniformly configure the number of the pre-DMRS symbols and the number of the DMRS CDM groups that are not used for carrying data for all subbands according to the number of the pre-DMRS symbols and the number of the DMRS CDM groups that are required for transmitting the subband with the largest number of spatial layers, which results in a waste of transmission resources for the subband with the smaller number of spatial layers.

Exemplarily, fig. 4 illustrates resource waste due to the same number of preamble DMRS symbols configured in the frequency domain. As shown in fig. 4, the frequency domain has 8 total subbands, which are numbered as subbands 1 to 8, and when subband matching is adopted, that is, when terminal equipment performs space division multiplexing on a subband basis, there are 7 total UEs corresponding to the 8 subbands, which are numbered as UEs 0 to 6. Assuming that each UE transmits data of a spatial layer 1 at most on each subband, as shown in fig. 4, taking subband 7 as an example, UEs 0 to 6 all transmit data of a spatial layer 1 on subband 7, and there are 7 spatial layers on subband 7 (S402), while taking subband 3 as an example,

UEs

0,1 and 4 all transmit data of a spatial layer 1 on subband 3, and there are only 3 spatial layers on subband 3 (S401). As can be seen from fig. 4, the subband with the largest number of spatial layers is subband 7, and the network device configures the 2-symbol preamble DMRS according to the number of spatial layers on subband 7. Taking the DMRS configured with type1 as an example, assuming that the number of CDM groups not used for data transmission is configured to be 3, for subband 3, only the pre-DMRS configured with 1 symbol can meet the transmission requirement, and when the pre-DMRS configured with 2 symbols is configured, transmission resources are wasted.

It should be noted that "symbol" referred to in this application may be understood as an OFDM symbol.

Exemplarily, fig. 5 illustrates resource waste due to the same number of DMRS CDM groups not used for carrying data configured in frequency domain. As shown in fig. 5, there are 8 subbands in the frequency domain, numbered subbands 1 to 8, and when subband matching is adopted, that is, when terminal equipment performs space division multiplexing on a subband basis, there are 7 UEs corresponding to the 8 subbands, and the number is numbered UEs 0 to 6. Assuming that each UE transmits data of a spatial layer 1 at most on each subband, as shown in fig. 5, taking subband 7 as an example, UEs 0 to 6 all transmit data of a spatial layer 1 on subband 7, and there are 7 spatial layers on subband 7 (S502), while taking subband 3 as an example,

UEs

0,1, and 4 all transmit data of a spatial layer 1 on subband 3, and there are only 3 spatial layers on subband 3 (S501). As can be seen from fig. 5, the sub-band with the largest number of spatial layers is sub-band 7, and the network device configures 2 CDM groups not used for data transmission according to the number of spatial layers on sub-band 7. For sub-band 3, only 1 CDM group not used for data transmission is configured to meet the transmission requirement, and when 2 CDM groups not used for data transmission are configured, waste of transmission resources is caused.

Therefore, it is desirable to provide a resource configuration method, which implements resource configuration of flexible number of preamble DMRS symbols in frequency domain and/or number of DMRS CDM groups not used for carrying data, thereby saving transmission resources.

The method for resource allocation according to the present application is described in detail below with reference to fig. 6 to 8.

Fig. 6 shows a schematic interaction diagram of a method 600 for resource configuration provided by the present application. The 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 herein may be understood as a resource configured by a scheduled UE, or may be understood as a frequency domain resource for carrying a downlink signal transmitted by a network device to a terminal device. Illustratively, the first frequency-domain resource belongs to BWP. Illustratively, the network device indicates the first frequency domain resource to the terminal device by a "frequency domain resource allocation" field in the DCI.

S602, the network device sends the PDSCH on the first frequency domain resource, and accordingly, 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 which are not used for carrying data and correspond to the first sub-frequency-domain resource, and the second number is the number of DMRS CDM groups which are not used for carrying data and correspond to the second sub-frequency-domain resource, or

(3) The first number is the number of the DMRS symbols corresponding to the first sub-frequency domain resource and the number of the DMRS Code Division Multiplexing (CDM) groups which are not used for carrying data, and the second number is the number of the DMRS symbols corresponding to the second sub-frequency domain resource and the number of the DMRSDM groups which are not used for carrying data.

It should be understood that, when the first number and the second number are different, it may be understood that the number of DMRS symbols corresponding to the first sub-frequency-domain resource is different from the number of DMRS symbols corresponding to the second sub-frequency-domain resource, and the number of DMRSCDM groups not used for carrying data corresponding to the first sub-frequency-domain resource is different from the number of DMRSCDM groups not used for carrying data corresponding to the second sub-frequency-domain resource.

In the present application, the method 600 is described by taking the above (1) or (2) as an example, but the present application is not limited thereto. A first possible implementation of the method 600 is illustrated by taking (1) above as an example.

According to the method and the device, the number of different preposed DMRS symbols is configured on the scheduled frequency domain resources according to communication requirements, so that flexible resource configuration on the frequency domain is realized, and the overhead for transmitting the DMRS is reduced.

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

Illustratively, the second sub-frequency-domain resources are frequency-domain resources of the first frequency-domain resources other than the first sub-frequency-domain resources. 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.

In the following, two resource allocation manners are taken as examples, and how the second indication information indicates the first sub-frequency-domain resource is described in detail.

In a first manner, the second indication information indicates the first sub-frequency domain resource in the first frequency domain resource in a bitmap manner (e.g., a type0 type resource allocation manner). In particular, the second indication information indicates that one or more first resource block groups in the first frequency domain resource are first sub-frequency domain resources. The first resource block group here includes one or more RBs.

Exemplarily, fig. 7 shows a schematic diagram of a first frequency domain resource. As shown in fig. 7, the first frequency domain resource includes 8 RBs, RB0 to RB7, a size (size) of one first resource block group is 2 RBs, the first frequency domain resource includes 4 first resource block groups, first resource block group 0 to first resource block group 3. The second indication information sent by the network device indicates that the first resource block group 1 of the terminal device is the first sub-frequency domain resource. Then, the terminal device determines the number and the 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 may determine the position of the first sub-frequency domain resource according to the second indication information.

In the second mode, when the terminal device uses a continuous resource allocation scheme (for example, a resource allocation scheme of type 1), the second indication information indicates one or more continuous first resource block groups in the first frequency domain resource through a Resource Indicator Value (RIV). The first resource block group here includes one or more RBs.

Illustratively, the network device indicates an RIV, such as RIV2, by the second indication information. The terminal equipment is based on the first frequencyDetermining 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 domain resource and the size of the first resource block group, and then starting the sequence number (RB) of the first resource block group corresponding to RIV2 _start ) And the number (L) of the first resource block groups allocated consecutively _RBs ) And determining the position of the first sub-frequency domain resource.

It should be understood that the first resource block group may be understood as an RBG configured by a higher layer parameter in the 5G NR, and may also be understood as another form of resource block group. The following describes in detail the implementation of determining the size of the first resource block group (size), taking four possible ways as an example. The third possible manner may be applicable to the first and second possible manners, and the first, second, and fourth possible manners may be applicable to only the first possible manner.

In a first possible manner, the size of the first resource block group is the size of an RBG configured by a high-level parameter (RBG-size). I.e. the first resource block group comprises a number of resource blocks being the number of resource blocks indicated by the higher layer parameter (rbg-size).

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

When the method is implemented, the definition of the first resource block group is delayed to use the existing RBG, and the change of the existing protocol is minimum compared with other possible methods.

In a second possible manner, the size of the first resource block group is dynamically changed 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 is dynamically changed with the number of scheduling resource block groups.

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

Illustratively, the third frequency domain resource is BWP or active bandwidth part (active bandwidth part) or bandwidth (bandwidth).

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

Then, the size of the first resource block group is the size of the RBG indicated by the high-level parameter RBG-size. (2) When the number of RBGs included in the first frequency-domain resource is smaller 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

As a further example of the use of the invention,

wherein,

is the size of the first group of resource blocks,

the RBG size indicated for the higher layer parameter RBG-size,

for the number of RBGs included in the first frequency domain resource,

is the number of RBGs included in the BWP. Illustratively, 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. As can be seen from Table 1, when the number of RBGs included in the first frequency-domain resource is greater than the number of RBGs included in the BWP

When the first resource block group is larger than the RBG indicated by the high-level parameter RBG-size, the first resource block group is larger than the RBG indicated by the high-level parameter RBG-size; when the first frequency domain resource includes the RBGs in a number less than or equal to the number of RBGs included in the BWP

And greater than the number of RBGs that the BWP includes

The size of the first resource block group is the size of RBG

When the first frequency domain resource includes the RBGs in a number less than or equal to the number of RBGs included in the BWP

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

TABLE 1

It should be understood that, in order to determine on which block of time-frequency resources the DCI for indicating itself is, the terminal device needs to perform blind detection on all available DCIs. Blind detection of the DCI with the same length only needs one configuration, blind detection of the DCI with different lengths needs different configurations, and the number of blind detection times is more than that of blind detection of the DCI with the same length. For example, assuming that there are two cases of DCI lengths that can be obtained by a terminal device, one is 4 bits and the other is 2 bits, the terminal device needs to perform blind detection on the DCI n times by using the configuration when the DCI length is 4, and needs to perform blind detection on the DCI 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 4 bits, the terminal device may perform blind detection on the DCI only by using the configuration when the DCI length is 4 bits. Therefore, in order to reduce the number of times that the terminal device blindly detects the DCI, the candidate value of the DCI length should be as small as possible.

In this embodiment, in order to ensure that the candidate value of the DCI length is as small as possible, the length of the second indication information is a fixed value, and the length of the second indication information is the length of the indication information required for scheduling all resource blocks in the BWP. When the number of actual scheduling resources, i.e., 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 maintains the length of the second indication information constant by padding bits at high bits. In order to avoid the waste of resources caused by the need of filling more bits into the second indication information when the scheduling resources are too few. According to the method, according to the actual resource scheduling condition, under the condition that the length of the indication information for scheduling the resources is not changed, the indication granularity is dynamically changed, namely the size of the first resource block group is dynamically determined, the indication and scheduling with smaller granularity can be realized, the expense for transmitting the DMRS is saved, meanwhile, the number of filling bits in the indication information is reduced, and the waste of the resources is further reduced.

In a third possible implementation manner, the size of the first resource block group is related to a coefficient.

The "one coefficient" is either predefined or configured for the network device through higher layer signaling.

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

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 the higher layer parameter

And (4) determining.

When k is an integer greater than 1, the size of the first resource block group is greater than the size of an RBG of a higher layer parameter configuration, wherein,

is the size of the first group of resource blocks,

is the size of the RBG.

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

The first resource block group consists of k RBs,

is equal to k, wherein,

is the size of the first resource block group.

It should be understood that the coefficient k here is either predefined or configured for the network device through higher layer signaling.

In this aspect, in the case where the coefficient k is greater than 1, the number of RBs included in the first resource block group becomes larger, so that the second indication information of the same length can indicate more RBs, reducing the overhead of the second indication information.

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.

Taking the type0 type resource allocation as an example,

wherein,

m is the length of the predefined second indication information for the size of BWP.

Taking the allocation of type1 type resources as an example,

or,

wherein,

m is a length of the predefined second indication information, which is a size of the first resource block group.

In this aspect, 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, thereby reducing the overhead of the second indication information.

In a fourth possible implementation, the size of the first resource block group is determined according to the number of RBGs included in the first frequency domain resource and a coefficient. The "one coefficient" may refer to the third possible embodiment.

As an example, when the "one coefficient" is the coefficient k in the third possible embodiment, (1) when the number of RBGs included in the first frequency domain resource is larger than the number of RBGs included in the BWP

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. (2) When the number of RBGs included in the first frequency-domain resource is smaller 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

And (4) doubling.

In this method, according to the actual resource scheduling situation, and under the condition that the length of the indication information for scheduling resources is not changed, the indication granularity is dynamically changed, that is, the size of the resource block group is dynamically determined, so that indication and scheduling with smaller granularity can be realized, the overhead of DMRS transmission is saved, the number of filling bits in the indication information is reduced, and the waste of resources is further reduced.

As a further example of the above-mentioned,

wherein,

is the size of the first group of resource blocks,

the RBG size indicated for the higher layer parameter RBG-size,

for the number of RBGs included in the first frequency-domain resource,

is the number of RBGs included in the BWP. Illustratively, table 2 shows another example in which the size of the first resource block group is dynamically changed with the number of RBGs included in the first frequency domain resource. As can be seen from Table 2, when the number of RBGs included in the first frequency-domain resource is greater than the number of RBGs included in the BWP

When the first resource block group is larger than the RBG indicated by the high-level parameter RBG-size, the size of the first resource block group is k times larger than that of the RBG indicated by the high-level parameter RBG-size; when the first frequency domain resource includes the RBGs in a number 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 first resource block group is the size of RBG

Doubling; when the first frequency domain resource includes the RBGs in a number less than or equal to the number of RBGs included in the BWP

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

And (4) multiplying.

TABLE 2

In this method, according to the actual resource scheduling situation, under the condition that the length of the indication information for scheduling resources is not changed, the indication granularity is dynamically changed, that is, the size of the resource block group is dynamically determined, so that indication and scheduling with smaller granularity can be realized, the overhead of DMRS transmission is saved, the number of filling bits in the indication information is reduced, and the waste of resources is further reduced.

As another example, when the "one coefficient" is the length M of the second indication information in the third possible embodiment, (1) when the number of RBGs included in the first frequency domain resource is larger than the number of RBGs included in the BWP

When the first resource block group is of the size

(2) When the number of RBGs included in the first frequency-domain resource is smaller than the number of RBGs included in the BWP

When the first resource block group has a size of

As a further example of the above-mentioned,

wherein,

is the size of the first group of resource blocks,

is the size of the BWP, and,

for the number of RBGs included in the first frequency domain resource,

m is a length of the predefined second indication information, which is the number of RBGs included in the BWP.

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

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

Optionally, the method 600 further comprises: the first sub-frequency-domain resource corresponds to at least one first DMRS port, the second sub-frequency-domain resource corresponds to at least one second DMRS port, and the number of the at least one first DMRS port is equal to the number of the at least one second DMRS port; when the index of any of the at least one first DMRS port is greater than a third threshold or the index of any of the one or more second DMRS ports is greater than a third threshold, the DMRS port included in the at least one first DMRS port is different from the DMRS port included in the at least one second DMRS port; when the indices of all of the at least one first DMRS port and the indices of all of the at least one second DMRS port are less than or equal to a 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 is indicated by fourth indication information, the fourth indication information being different from the third indication information.

The above scheme is explained in detail below in two possible ways as examples.

In a possible manner, the third indication information is used to indicate the number of preamble DMRS symbols, the number of DMRS CDM groups not used for carrying data, and at least one first DMRS port and at least one second DMRS port. For example, the number of preamble DMRS symbols, the number of DMRS CDM groups not used for carrying data, and the at least one first DMRS port indicated by the third indication information may be configured for the first antenna port indicated by the antenna port field in 3GPP standard TS 38.212.

It should be understood that, here, the at least one first DMRS port or the at least one second DMRS port may be understood as a DMRS port used when DMRS transmission is performed on the frequency-domain resource corresponding to the first number or the second number indicated by the third indication information. For example, if the third indication information is used to indicate the first number, the first sub-frequency-domain resource uses at least one first DMRS port for DMRS transmission, and then the second sub-frequency-domain resource uses at least one second DMRS port for DMRS transmission. Or, for example, if the third indication information is used to indicate the second number, the second sub-frequency-domain resource uses at least one first DMRS port for DMRS transmission, and then the first sub-frequency-domain resource uses at least one second DMRS port for DMRS transmission.

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, the fourth column is the number of preamble DMRS symbols, and the fifth column is the port index value of the second DMRS port. As can be seen from table 3, each index value corresponds to one of the first antenna port configuration and the second DMRS port. The third indication information may include one index value in table 3, that is, any value in the first column of table 3, according to which the terminal device determines the first antenna port configuration and the at least one second DMRS port.

It should be understood that the number of the pre-DMRS symbols of the frequency domain resource configurations corresponding to the first DMRS port and the second DMRS port are different, and in table 3, taking the number of the pre-DMRS symbols corresponding to the first DMRS port as 2 as an example, the number of the pre-DMRS symbols corresponding to the second DMRS port is 1. When the number of DMRS CDM groups not used for carrying data is 2 and the number of preamble DMRS symbols is 2, the port index value of the corresponding first DMRS port has 8 candidate values, e.g., 0 to 7 in the third column in table 3; when the number of DMRS CDM groups not used for carrying data is 2 and the number of preamble DMRS symbols is 1, the port index value of the corresponding second DMRS port has 4 candidate values, for example, 0 to 3 in the fifth column in table 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 of the at least one first DMRS port included therein is greater than a third threshold or the index of any of the one or more second DMRS ports included therein is greater than a third threshold, the DMRS port included therein is different from the DMRS port included therein. As used herein, the phrase that any DMRS port included in the at least one first DMRS port is different from any DMRS port included in the at least one second DMRS port means that any port index value of the first DMRS port is different from any port index value of the second DMRS port in table 3. The third threshold here may be a maximum port index value of DMRS ports corresponding to the number of DMRS CDM groups that are not used for carrying data when the number of symbols of the preamble DMRS is 1. For example, when the number of symbols of the preamble DMRS is 1, as shown in table 3, the number of DMRS CDM groups not used to carry data, indicated by the third indication information, is 2, the maximum index of the corresponding DMRS port is 3, and the index value is in 4 rows of 16 to 19, where 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 the 4 rows is different from any port index value of the second DMRS port.

In particular, when the indexes of all of the DMRS ports included in the at least one first DMRS port and the indexes of all of the DMRS ports included in the at least one second DMRS port are less than or equal to a third threshold, the DMRS ports included in the at least one first DMRS port are the same as the DMRS ports included in the at least one second DMRS port. As used herein, the phrase that any DMRS port included in the at least one first DMRS port is the same as that included in the at least one second DMRS port means that any port index value of the first DMRS port is the same as any port index value of the second DMRS port in table 3. The third threshold may be that, when the number of symbols of the preamble DMRS is 1, the third indication information indicates a maximum port index value of DMRS ports corresponding to the number of DMRS CDM groups that are not used for carrying data. For example, when the number of symbols of the preamble DMRS is 1, as shown in table 3, the third indication information indicates that the number of DMRS CDM groups not used for carrying data is 2, the maximum index of the corresponding DMRS port is 3, and the index value is in 4 rows of 12 to 15, where 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 the 4 rows is the same as any port index value of the second DMRS port.

TABLE 3

In a second possible manner, the third indication information is used to indicate the number of preamble DMRS symbols, DMRS CDM groups that are not used to carry data, and at least one first DMRS port. For example, the number of preamble DMRS symbols, the number of DMRS CDM groups not used for carrying data, and the at least one first DMRS port indicated by the third indication information may be configured for the first antenna port indicated by the antenna port field in 3GPP standard TS 38.212. The network device may further transmit fourth indication information to the terminal device, the fourth indication information indicating the at least one second DMRS port.

It should be understood that the first DMRS port may be understood as a DMRS port used when DMRS transmission is performed on frequency-domain resources corresponding to the first number or the second number indicated by the third indication information. For example, if the third indication information is used to indicate the first number, 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. And if the third indication information is used for indicating the second number, the second sub-frequency-domain resource uses at least one first DMRS port to perform DMRS transmission, and at this time, the first sub-frequency-domain resource uses at least one second DMRS port to perform 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 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 preamble DMRS symbols. As can be seen from table 4, each index value corresponds to a first antenna port configuration. The third indication information may include one index value in table 4, that is, any value in the first column in table 3, and the terminal device determines the first antenna port configuration according to the one index value. The fourth indication information is used to indicate a port index value of a second DMRS port corresponding to the first antenna port configuration.

TABLE 4

It should be understood that, in this scheme, the first frequency domain resource includes two frequency domain resources with different numbers of configured preamble DMRS symbols, and if the first antenna port configuration indicated by the antenna port field in the existing 3GPP standard TS 38.212 is used, the two frequency domain resources can only adopt one DMRS port, and then the port index values of the DMRS ports corresponding to the two frequency domain resources must be consistent. However, when the number of DMRS CDM groups that are not used for carrying data is the same, the ranges of index values of DMRS ports that can be selected by the frequency domain resources with the number of

pre-DMRS symbols

1 and 2 are different, and to make two parts of frequency domain resources select the same DMRS port, it is imperative that a part of DMRS ports corresponding to the frequency domain resources with the number of pre-DMRS symbols 2 cannot be utilized, which results in waste of resources.

It should be noted that, in the present application, the first indication information, the second indication information, and the third indication information 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 fig. 6, the numbers of the indication information are only for convenience of description, and the order between the steps is not limited, and in a specific implementation, the indication information may be sent together from the network device to the terminal device, or may be sent successively from the network device to the terminal device.

According to the embodiment of the application, the DMRS ports are respectively configured for the two parts of frequency domain resources with different numbers of the pre-DMRS symbols configured in the frequency domain resources for carrying the transmission signals of the network equipment and the terminal equipment, so that the waste of the DMRS port resources is avoided, and the flexibility of resource scheduling is improved.

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

It should be understood that the first frequency domain resource herein may be understood as a resource configured by a scheduled UE, or may be understood as a frequency domain resource for carrying a downlink signal transmitted by a network device to a terminal device. Illustratively, the first frequency-domain resource belongs to a portion of BWP. Illustratively, the network device indicates the first frequency domain resource to the terminal device by a "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 for indicating the first frequency domain resource. The first sub-indication information indicates the first frequency domain resource through the RIV by using a resource indication mode of continuous resource allocation. Any RIV corresponds to a set of parameters for determining the continuously allocated frequency domain resources, including the sequence number RB of the starting resource block of the first frequency domain resource _start And the number L of consecutive allocated resource blocks _RBs . The second sub-indication information is mainly used to indicate the configuration of the resource block group in the second frequency domain resource, and will be described in detail in three possible cases. Illustratively, the first indication information is a "frequency domain resource allocation" field in the DCI, the existing "frequency domain resource allocation" field may be used to indicate the first frequency domain resource, and in a second possible embodiment, the "frequency domain resource allocation" field is multiplexed to indicate the configuration of the resource block group in the second frequency domain resource.

Before describing three possible cases of the second sub-indication information, the differences and the connections among the first frequency domain resource, the second frequency domain resource, the first sub-frequency domain resource and the second sub-frequency domain resource are described in detail with reference to fig. 8.

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

Exemplarily, fig. 8 shows an example of the first frequency domain resource. As shown in fig. 8, the first frequency domain resources (all blocks in fig. 8) include first sub-frequency domain resources (blank blocks in fig. 8) and second sub-frequency domain resources (diagonal blocks in fig. 8), and S801 is the second frequency domain resources, and the first frequency domain resources include the second frequency domain resources. As shown in (a) of fig. 8, one or more resource block groups belonging to the first sub-frequency-domain resource may be included in the second frequency-domain resource (S802), and one or more resource block groups belonging to the second sub-frequency-domain resource may also be included (S803). Alternatively, as shown in (b) of fig. 8, the one or more resource block groups (S803) included in the second frequency domain resource all belong to the second sub-frequency domain resource. Alternatively, as shown in (c) of fig. 8, the second frequency domain resource includes one or more resource block groups (S802) all belonging to the first sub-frequency domain resource.

It should be understood that "the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource", it is understood that, assuming that the first frequency domain resource includes N first resource block groups, the second frequency domain resource includes i first resource block groups, i and N are positive integers, and N ≧ i, the terminal device can determine the second frequency domain resource in the first frequency domain resource once the size of i is determined. For example, the i first resource block groups included in the second frequency domain resource may be the first resource block groups with indexes of 0, 1., i-1 in the first frequency domain resource, as shown in (a) of fig. 8, and S801 is the first resource block groups with indexes of 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 group with the index N-i, \8230, N-1 in the first frequency domain resource, as shown in (d) in fig. 8, and S801 is the first resource block group with the index 15 to 20 in the first frequency domain resource.

In a possible case, the second sub-indication information is used to indicate one or more resource block groups in a second frequency domain resource, where the one or more resource block groups belong to the first sub-frequency domain resource, and other resource block groups in the second frequency domain resource except the one or more resource block groups belong to the second sub-frequency domain resource.

Possibly, 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.

Possibly, the second sub-indication information is used to indicate the number of pre-DMRS symbols or the number of DMRS CDM groups not used for carrying data corresponding to each resource block group in the second frequency-domain resource, where resource block groups with the first number of pre-DMRS symbols or the number of DMRS CDM groups not used for carrying data in the second frequency-domain resource belong to the first sub-frequency-domain resource, and resource block groups with the second number of pre-DMRS symbols or the number of DMRS CDM groups not used for carrying data in the second frequency-domain resource belong to the second sub-frequency-domain resource.

It should be understood that to implement the above scheme, the third frequency domain resources and/or the first frequency domain resources need to satisfy any one of the following conditions. Wherein the third frequency domain resources include the first frequency domain resources.

Under the first condition, the number of resource blocks included in the third frequency domain resource is not M, where M belongs to a preset first number set. In other words, the number of resource blocks included in the third frequency domain resource is not expected to belong to the first number set by the network device or the terminal device.

Illustratively, the first set of quantities may include one or more values of {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} in the set. Alternatively, other sets are possible, and the present application is not limited thereto.

The second condition is that the number of resource blocks included in the third frequency domain resource is N, and the N belongs to a preset second number set; in other words, the network device or the terminal device expects that the third frequency domain resource includes resource blocks of which the number belongs to the second number set.

Illustratively, the first set of quantities may include one or more of {32,33,45,46,64,65,91,92,128,129,130,131,140,141,181,182,256,257 }. Alternatively, other sets are possible, and the present application is not limited thereto.

And thirdly, the relation between the number of the resource blocks included in the third frequency domain resource and the number of the resource blocks included in the first resource block group meets a first preset condition.

The third condition is described in detail below with the third frequency domain resource being BWP as an example.

Illustratively, the size of the BWP and the size of the first resource block group satisfy

Wherein,

is the size of the BWP, and,

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 at most n first resource block groups in the first frequency domain resource (corresponding to the above possible case one or possible case two) or may indicate the number of preamble DMRS symbols of at most n first resource block groups in the first frequency domain resource (corresponding to the above possible case three). Alternatively, it can be said that the second frequency domain resource includes a number of resource block groups smaller than or equal to the second threshold. The second threshold is n. The definition of n here may be understood as a maximum value of the number of first resource block groups in the first frequency domain resource that the second sub-indication information may indicate, where n is a positive integer. And the value of n can also be determined in various ways. In the following, 3 ways of determining the value of n are taken as examples, and possible methods of determining the value of n are described.

In mode 1, a terminal device determines n according to a high-level signaling sent by a network device. Or,

mode 2, the terminal device determines n for each BWP predefined in the standard. Or,

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

The following describes a method for determining the value of n in detail by taking the 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:

wherein,

is the size of the first group of resource blocks,

is the size of BWP.

It follows that the value of n may be different when different BWPs and different first resource block group sizes are configured.

In this application, the maximum value of the number of first resource block groups included in the second frequency domain resource is denoted as n, and the number of 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 one to three is satisfied and the value of n is determined, in a specific implementation, there may be a case where the second sub-indication information indicates 0 first resource block groups, or i =0, which is the same as that in the first possible implementation. In order to avoid the case of i =0, i.e. to ensure that i > 0, the size of the first frequency domain resource indicated by the first sub-indication information needs to satisfy the second preset condition.

Illustratively, the second preset condition is

Wherein,

is the size of the first group of resource blocks,

is the size of BWP.

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

wherein,

as the number of the first resource block group included in the first frequency domain resource,

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

As can be seen from the above, 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, with two possible examples, when the size of the first frequency domain resource satisfies the second preset condition, a detailed description will be made on how the network device indicates the first frequency domain resource and the second frequency domain resource in the first frequency domain resource through the first indication information, and how the terminal device determines the first frequency domain resource and the second frequency domain resource in the first frequency domain resource according to the first indication information.

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

The first indication information indicates the first frequency domain resource through RIV by adopting a resource indication mode of continuous resource allocation. First sub-indication information, i.e. first indication information indicationThe frequency domain pattern comprises a sequence number RB of a starting resource block of the first frequency domain resource _start And the number L of consecutively allocated resource blocks _RBs A candidate value of (a).

It is to be understood that each RIV corresponds to one frequency domain pattern, wherein each frequency domain pattern comprises a sequence number RB of a starting resource block of the first frequency domain resource _start And the number L of consecutively allocated resource blocks _RBs A candidate value of. The number L of consecutive allocated resource blocks included in the frequency domain pattern _RBs Is greater than

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

is the size of the first group of resource blocks,

is the size of BWP.

And the at least two RIVs corresponding to each frequency domain pattern comprise a first RIV smaller than a second preset threshold, and the RIVs of the at least two RIVs except the first RIV are all larger than the second preset threshold. The second predetermined threshold is

Wherein,

is the size of BWP.

Exemplarily, in the case where n is 2, the RIV corresponding to the frequency domain pattern is determined as follows:

1) If it is not

The frequency domain pattern corresponds to 1 RIV, which is calculated as in TS 38.214Shown in the specification;

2) If it is not

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

if it is not

The frequency domain pattern corresponds to 2 RIVs, RIV0 and RIV1, with RIV0 being calculated as described in TS 38.214; the RIV1 is calculated as follows: if it is not

i =1; if not, then,

i＝1；

if it is not

The frequency domain patterns correspond to 4 RIVs, RIV2, RIV3, RIV4 and RIV5, RIV2 is calculated as described in 38.214 and RIV2, RIV3 and RIV4 are calculated as follows: if it is not

i =1,2,3,4; if not, then,

i＝1,2,3,4；

wherein,

illustratively, one candidate value for each frequency-domain pattern of the first frequency-domain resource corresponds to 2 ⁱ And (4) an RIV.

Exemplarily, as shown in table 5, candidate values of the frequency domain pattern

And

the second frequency domain resource in the first frequency domain resources corresponding to the candidate value comprises the first resource block group with the number i of 1, corresponding to RIV0 and RIV1, and the candidate value of the frequency domain pattern

And

corresponding to RIV2, RIV3, RIV4 and RIV5, the second frequency domain resource in the first frequency domain resource corresponding to the candidate value includes the number i of the first resource block group which is 2.

TABLE 5

(2) And the terminal equipment determines second sub-indication information according to the first indication information, wherein the second sub-indication information is used for indicating a pre-DMRS configuration pattern corresponding to the RIV, and determines the configuration of the number of pre-DMRS symbols of each first resource block group of the second frequency domain resource according to the second sub-indication information. Before that, the terminal device needs to acquire pattern information indicating a mapping relationship between a plurality of patterns and a plurality of index values. It should be understood that, the multiple patterns herein configure the patterns for multiple DMRSs, and the pattern information may be pre-configured on the terminal device side or sent by the network device to the terminal device. The terminal device determines second sub-indication information according to the RIV indicated by the first indication information and the pattern information, where the second sub-indication information is a preamble DMRS configuration pattern in the pattern information; and determining the configuration of the number of the front DMRS symbols of each first resource block group of the second frequency domain resources according to the pattern.

It should be understood that (2) in a specific implementation, different cases may be included, and the following describes in detail the configuration of the terminal device for determining the number of the preamble DMRS symbols of each first resource block group of the second frequency domain resource by taking two possible ways as examples.

In a possible first manner, corresponding to the possible third case, the terminal device determines, according to the second sub-indication information, the configuration of the number of the pre-DMRS symbols of each first resource block group of the second frequency domain resource.

In the configuration pattern of the number of the preposed DMRS symbols corresponding to the second frequency domain resource, 2 is used ⁱ The multiple RIVs indicate all possible cases of configuration of the number of preamble DMRS symbols of the i first resource block groups in the second frequency-domain resource. Wherein 2 ⁱ In the multiple RIVs, any one RIV corresponds to the configuration of the number of the front DMRS symbols of the i first resource block groups, and the configuration of the number of the front DMRS symbols of any two RIVs corresponding to the i first resource block groups is different. That is, the mapping relationship between the plurality of patterns and the plurality of index values may be a mapping relationship between the plurality of patterns and the plurality of RIVs. One of the plurality of RIVs may uniquely correspond to one of a plurality of patterns. Any pattern of the plurality of patterns may include a configuration of the number of preamble DMRS symbols for each of the i first resource block groups. Any two patterns of the plurality of patterns are different. Wherein, according to the method in (1), the RIVs correspond to a frequency domain pattern, i.e., the 2 ⁱ Each RIV corresponds to a frequency domain pattern including a sequence number RB of a starting resource block of a first frequency domain resource _start And the number L of consecutively allocated resource blocks _RBs A candidate value of. Wherein the frequency domain pattern comprises a number L of continuously allocated resource blocks _RBs Is greater than

Illustratively, the number of the first resource block groups included in the BWP of the terminal device is 8, and the terminal device determines n =2, and the number of the 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 the pre-DMRS symbols of the 2 first resource block groups, then 4 RIVs are needed to indicate the pre-DMRS symbol number configuration pattern, and the pre-DMRS symbol number configuration patterns of the 2 first resource block groups corresponding to RIV1, RIV2, RIV3 and RIV4, respectively, 4 RIVs are shown in table 6 below. Table 6 may be an exemplary pattern information.

TABLE 6

And the terminal equipment determines the configuration of the number of the front DMRS symbols of the 2 first resource block groups according to the front 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 RIV0, the configuration that the number of the pre-DMRS symbols of the 2 first resource block groups is determined to be [2,2], then the terminal device may determine that the 2 first resource block groups are all the second sub-frequency domain resources; when the terminal device receives RIV1, it determines the configuration [1,2] of the number of the pre-DMRS symbols of the 2 first resource block groups, and then the terminal device may determine that the first resource block group 0 is a first sub-frequency domain resource, and the first resource block group 1 is a second sub-frequency domain resource; when the terminal device receives an RIV2, it determines that the number of the pre-DMRS symbols of the 2 first resource block groups is configured to [2,1], then the terminal device may determine that the first resource block group 0 is the second sub-frequency domain resource, and the first resource block group 1 is the first sub-frequency domain resource, and when the terminal device receives an RIV3, it determines that the number of the pre-DMRS symbols of the 2 first resource block groups is configured to [1,1], then the terminal device may determine that the 2 first resource block groups are all the first sub-frequency domain resources.

Exemplarily, the number of the first resource block groups included in the BWP of the terminal device is 8, and the terminal device determines n =2, if the number of the first resource block groups included in the first frequency domain resource is 7, i =1, that is, the second sub-indication information needs to indicate the number of the pre-DMRS symbols of 1 first resource block group, then 2 RIVs are needed to indicate the pre-DMRS symbol number configuration pattern, which is the pre-DMRS symbol number configuration pattern of 1 first resource block group corresponding to RIV4, RIV5, and 2 RIVs, respectively, as shown in table 7 below. Table 7 may be an exemplary pattern information.

TABLE 7

RIV	Number of preamble DMRS symbols of first resource block group 0
		RIV 4	2
RIV 5	1

And the terminal equipment determines the configuration of the front DMRS symbols of the 1 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, and determines that the configuration of the number of the pre-DMRS symbols of 1 first resource block group is 2, the terminal device may determine that the 1 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 the pre-DMRS symbols of the 1 first resource block group is 1, and then the terminal device may determine that the 1 first resource block group is the second sub-frequency-domain resource.

Optionally, the terminal device needs to obtain pattern information, where the pattern information may include mapping relationships between multiple patterns and multiple index values, and mapping relationships between multiple index values and frequency domain patterns. That is, the pattern information may include mapping relationships between a plurality of patterns and a plurality of RIVs, and mapping relationships between the plurality of 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 patterns and the RIVs is as described above, and the mapping relationship between the RIVs and the frequency domain patterns is the mapping relationship described in (1), which is not described herein again.

Exemplarily, the frequency domain pattern of the first frequency domain resource and the preamble DMRS symbol number configuration pattern are as shown in tables 8 and 9 below. Table 8 corresponds to table 6 above, and table 9 corresponds to table 7 above.

In the corresponding example of table 6, the terminal device receives the RIV in the first indication information, and can determine the configuration of the number of the preamble DMRS symbols of each first resource block group in the first frequency domain resource and the second frequency domain resource according to table 8. Table 8 may be an exemplary pattern information.

TABLE 8

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

TABLE 9

In a second possible manner, corresponding to the first and second possible cases, the terminal device determines, according to the second sub-indication information, the third indication information in S604, and the pre-DMRS symbol number configuration pattern, the configuration of the number of pre-DMRS symbols for each first resource block group of the second frequency domain resource.

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

In the configuration pattern of the number of the preposed DMRS symbols corresponding to the second frequency domain resource, 2 is used ⁱ The multiple RIVs indicate all possible cases of configuration of the number of preamble DMRS symbols of the i first resource block groups in the second frequency-domain resource. Therein, 2 ⁱ In the multiple RIVs, any one RIV corresponds to the configuration of the number of the front DMRS symbols of the i first resource block groups, and the configuration of the number of the front DMRS symbols of the i first resource block groups corresponding to any two RIVs is different.

Illustratively, the number of the first resource block groups included in the BWP of the terminal device is 8, and the terminal device determines n =2, and the number of the 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 the pre-DMRS symbols of the 2 first resource block groups, then 4 RIVs are needed to indicate the pre-DMRS symbol number configuration pattern, and the pre-DMRS symbol number configuration patterns of the 2 first resource block groups corresponding to RIV1, RIV2, RIV3 and RIV4, respectively, 4 RIVs are shown in table 10 below. In the configuration pattern in table 10, the number of the preamble DMRS symbols for a certain first resource block group is denoted by 0, is the same as the number (the first number or the second number) indicated by the third indication information, and is denoted by 1.

Watch 10

And the terminal equipment determines the configuration of the number of the front DMRS symbols of the 2 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 RIV0, it is determined that the configuration of the number of the pre-DMRS symbols of the 2 first resource block groups is the same as the first number, and then the terminal device may determine that the 2 first resource block groups are all first sub-frequency domain resources; when the terminal device receives the RIV1, it is determined that the configuration of the number of the pre-DMRS symbols of the first resource block group 0 is different from the first number, and the configuration of the number of the pre-DMRS symbols of the first resource block group 1 is the same as the first number, then the terminal device may determine that the first resource block group 0 is the second sub-frequency domain resource, and the first resource block group 1 is the first sub-frequency domain resource; when the terminal device receives an RIV2, it is determined that the configuration of the number of the pre-DMRS symbols of the first resource block group 0 is the same as the first number, and the configuration of the number of the pre-DMRS symbols of the first resource block group 1 is different from the first number, then the terminal device may 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, and when the terminal device receives an RIV3, it is determined that the configuration of the number of the pre-DMRS symbols of the 2 first resource block groups is different from the first number, then the terminal device may determine that the 2 first resource block groups are all the second 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 n =2, if the number of first resource block groups included in the first frequency domain resource is 7, i =1, that is, the second sub-indication information needs to indicate the number of pre-DMRS symbols of 1 first resource block group, then 2 RIVs are needed to indicate pre-DMRS symbol number configuration patterns, which are respectively RIV4, RIV5, and pre-DMRS symbol number configuration patterns of 1 first resource block group corresponding to 2 RIVs are shown in table 11 below. In the configuration pattern in table 11, the number of the preamble DMRS symbols for a certain first resource block group is denoted by 0, is the same as the number (the first number or the second number) indicated by the third indication information, and is denoted by 1.

TABLE 11

RIV	Number of preamble DMRS symbols of first resource block group 0
		RIV 4	0
RIV 5	1

And the terminal equipment determines the configuration of the preposed DMRS symbols of the 1 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, and it is determined that the configuration of the number of the pre-DMRS symbols of 1 first resource block group is the same as the first number, the terminal device may determine that the 1 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 the pre-DMRS symbols of the 1 first resource block group is different from the first number, and then the terminal device may determine that the 1 first resource block group is the second sub-frequency domain resource.

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

Exemplarily, the frequency domain pattern of the first frequency domain resource and the preamble DMRS symbol number configuration pattern are as shown in tables 12 and 13 below. Table 12 corresponds to table 10 above, and table 13 corresponds to table 11 above.

In the corresponding example of table 10, the terminal device receives the RIV in the first indication information, and can determine the configuration of the number of 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 12.

TABLE 12

In the corresponding example of table 11, the terminal device receives the RIV in the first indication information, and can determine the configuration of the number of 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 13.

Watch 13

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

Exemplarily, the second preset condition is that the first frequency domain resource includes

When n =1, the second preset condition is that the first frequency domain resource includes

Wherein,

is the size of the first group of resource blocks,

is the size of BWP.

It should be understood that when the second preset condition described above is met, i > 0, and since i ≦ n, i =1. The second frequency domain resource is a predetermined one of the first resource block groups.

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

The first sub-indication information indicates the first frequency domain resource through the RIV by adopting a resource indication mode of continuous resource allocation. The frequency domain pattern of the first frequency domain resource corresponds to 2 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 a second preset threshold, and the second RIV is larger than or equal to the second preset threshold. The first and second RIVs correspond to different numbers of preamble DMRS symbols, respectively. The second predetermined threshold is

Wherein,

is the size of BWP.

The calculation of the first and second RIVs is described below by way of example.

Illustratively, the first RIV is determined according to the RIV calculation in type1 resource allocation type in 3gpp TS 38.214.

The second RIV may be determined according to the following: when in use

When the second RIV is equal to

When in use

When the second RIV is equal to

Wherein RB _start Is the sequence number, L, of the starting resource block of the first frequency domain resource _RBs For the number of resource blocks to be allocated consecutively,

is the size of the BWP, and,

is the size of the first resource block group.

(2) And the terminal equipment determines the configuration of the number of the 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 comprises one RIV, and when the RIV is the first RIV, the terminal equipment determines that the number of the preposed DMRS symbols of the second frequency domain resource is the same as that of the preposed DMRS symbols indicated by the third indication information; and when the one RIV is the second RIV, the terminal equipment determines that the number of the preposed DMRS symbols of the second frequency domain resource is different from the number of the preposed 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 the preamble DMRS symbols of the second frequency domain resource is the first value; and when the RIV is a second RIV, the terminal equipment determines the number of the preposed DMRS symbols of the second frequency domain resource to be a second value, wherein the second value is not equal to the first value, and the first value and the second value are respectively one of {1,2 }.

As an example, the BWP of the terminal device includes 16 RBs numbered RB0 to 15, the network device allocates RB0 to 14 for the terminal device to receive the downlink signal, i.e. the first frequency domain resource includes RB0 to 14, the size of the first resource block group is 4,

the first frequency domain resource includes a number of consecutive allocated RBs of 15 greater than

That is, the size of the first frequency domain resource satisfies the second predetermined condition, the continuous resource allocation pattern corresponding to the first frequency domain resource corresponds to 2 RIVs. The 2 are 63 and 167. Second predetermined threshold

When the terminal device receives the RIV indicated by the second sub-indication information as 167, the terminal device determines that the number of the pre-DMRS symbols of the 1 first resource block group in the first frequency domain resource is 2 because the RIV is greater than 136, and when the terminal device receives the RIV indicated by the second sub-indication information as 63, the terminal device determines that the number of the pre-DMRS symbols of the 1 first resource block group in the first frequency domain resource is 1 because the RIV is less than 136.

S602 is similar to S602 in the first possible implementation manner, and is not described herein again.

According to the method and the device, the number of different pre-DMRS symbols is configured on the scheduled frequency domain resources according to communication requirements, flexible resource configuration on the frequency domain is achieved, the overhead for transmitting the DMRS is reduced, the predetermined frequency domain resources in the scheduled frequency domain resources are indicated by multiplexing the existing fields, and the overhead indicated by the DCI is further reduced. Further, when the size of the predetermined frequency domain resource is fixed, the embodiment of the application can reduce the processing complexity of the terminal device.

Optionally, S603, the network device sends second indication information to the terminal device, and accordingly, the terminal device receives the second indication information from the network device, where the second indication information is used to indicate a frequency domain resource belonging to the first sub-frequency domain resource in the other frequency domain resources except for the second frequency domain resource in the first frequency domain resource, where the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource. Or, the second indication information is used to indicate one or more resource block groups in the first frequency domain resource except for the second frequency domain resource, where the one or more resource block groups belong to the first sub-frequency domain resource.

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

The manner in which the second indication information indicates the frequency domain resources belonging to the first sub-frequency domain resource in the "other frequency domain resources" is similar to the manner in which the second indication information indicates the first sub-frequency domain resource in S603 in the first possible implementation manner, and is not repeated here.

In the frequency domain resource of the downlink signal sent by the bearer network device to the terminal device, the second indication information only needs to indicate the resource except the predetermined frequency domain resource, so that signaling overhead is reduced, and the resource is saved.

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. The specific determination manner is described in detail in a first manner and a second manner in the first possible implementation manner, and is not described herein again. For details about four possible ways of determining the size of the first resource block group, see the possible ways from one to four in the first possible implementation, which are not described herein again.

Optionally, S604 is similar to S604 in the first possible implementation, and is not described herein again.

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

For a detailed description of the above scheme, reference is made to a detailed description of a first possible implementation manner and a detailed description of a second possible implementation manner of the scheme, which are not described herein again.

A third possible implementation manner is similar to the first possible implementation manner in main steps, and it is described by taking (2) in S602 in the first possible implementation manner as an example that the number of pre-DMRS ports in the first possible implementation manner needs to be replaced by the number of DMRS CDM groups that are not used for carrying data.

A fourth possible implementation manner is similar to the second possible implementation manner in the main steps, and taking (2) in S602 in the second possible implementation manner as an example, it is required to replace the number of the pre-DMRS ports in the second possible implementation manner with the number of DMRS CDM groups that are not used for carrying data.

It should be understood that the number of the front DMRS ports may take a value of 1 or 2, and when the terminal device adopts DMRStype1, there are only two configurations of the number of DMRS CDM groups not used for carrying data, and thus, the third and fourth possible implementations are similar to the first and second possible implementations, respectively, and the number of DMRS CDM groups not used for carrying data of the second frequency domain resource may be uniquely determined. However, when the terminal device employs DMRStype2, there are 3 configurations of the number of DMRS CDM groups not used for carrying data, and thus the terminal device cannot uniquely determine the number of DMRS CDM groups not used for carrying data.

The following illustrates differences of the third possible implementation compared to the first possible implementation:

the method 600 further includes the network device transmitting fifth indication information to the terminal device, and the terminal device receiving the fifth indication information from the network device, the fifth indication information indicating a number of DMRS, CDM, groups of the first sub-frequency-domain resources that are not used for carrying data. The terminal device determines the configuration of the number of DMRS CDM groups not used for carrying data for all first resource block groups in the first frequency domain resources according to the fifth indication information.

The following describes in detail an example in which the third indication information indicates the second quantity and the third indication information indicates the first quantity.

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

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

TABLE 14

As another example, the fifth indication information may be a difference between the number of DMRS CDM groups not used for carrying data corresponding to the first sub-frequency-domain resource and the second number by means of an index.

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

Watch 15

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

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

For the third possible implementation manner, in the embodiment of the present application, the number of different DMRS CDM groups not used for carrying data is configured on the scheduled frequency domain resources according to communication needs, so that flexible resource configuration on the frequency domain is implemented, and overhead for transmitting the DMRS is reduced.

The following illustrates differences of the fourth possible implementation compared to the second possible implementation:

(1) When the second sub-indication information indicates, in an indexed manner, the number of DMRS, CDM groups not used for carrying data for the first resource block group in the second frequency domain resource, assuming that the configuration of the number of DMRS, CDM groups not used for carrying data for different first resource block groups in the first frequency domain resource includes 3 cases, that is, 1,2, and 3, and is only applicable to "possible case three", that is, the second sub-indication information is used to indicate the number of DMRS, CDM groups not used for carrying data for each resource block group in the second frequency domain resource, where resource block groups in the second frequency domain resource, for which the number of DMRS, CDM groups not used for carrying data is the first number, belong to the first sub-frequency domain resource, and resource block groups in the second frequency domain resource, for which the number of pre-DMRS, symbols or the number of DMRS, CDM groups not used for carrying data is the second number, belong to the second sub-frequency domain resource; assuming that the configuration of different first resource block groups in the first frequency domain resources corresponding to the number of DMRS CDM groups not used for carrying data includes only 2 cases, if 1,2, or 2,3, or 1, 3, "case one possible", "case two possible", and "case three possible" in S601 may be applicable.

It should be noted that, in the specific indication, the number of DMRS CDM groups that are not used for carrying data may be directly indicated, or a difference value between each first resource block group in the second frequency domain resource and the second number indicated by the third indication information may be indicated.

Illustratively, when the pattern manner is used to indicate the number of DMRS CDM groups not used for carrying data or the above difference, the number of RIVs corresponding to the second frequency domain resource including the i first resource block groups is 3 ⁱ 。

(2) The method 600 further includes the network device transmitting a fifth indication information to the terminal device, and accordingly the terminal device receiving the fifth indication information from the network device, the fifth indication information indicating a number of DMRS CDM groups of the first sub-frequency-domain resources that are not used for carrying data. The terminal device determines the configuration of the number of DMRS CDM groups not used for carrying data of all first resource block groups in the first frequency domain resources according to the fifth indication information.

For specific implementation, reference may be made to the related scheme in the above "difference between the third possible implementation manner and the first possible implementation manner", and details are not repeated herein.

For the fourth possible implementation manner, in the embodiment of the present application, DMRS ports are respectively configured for two different frequency domain resources, which are configured in the frequency domain resources carrying signals transmitted by the network device and the terminal device and are not used for carrying data, so that flexible resource configuration in the frequency domain is achieved, waste of DMRS port resources is avoided, and flexibility of resource scheduling is improved.

A fifth possible implementation manner, when DMRStype2 is used, there are 3 configurations of the number of DMRS CDM groups not used for carrying data, that is, the number of DMRS CDM groups not used for carrying data is 1,2, or 3, the first frequency domain resource includes a first sub-frequency domain resource, a second sub-frequency domain resource, and a third sub-frequency domain resource, and the number of DMRS CDM groups not used for carrying data corresponding to the three sub-frequency domain resources is different, and on the basis of the third possible implementation manner, the following differences exist: and the terminal equipment determines the number of the DMRS CDM groups which are not used for carrying data of the third sub-frequency-domain resource according to the configuration of the number of the DMRS CDM groups which are not used for carrying data of the first sub-frequency-domain resource and the second sub-frequency-domain resource.

For the fifth possible implementation manner, in the embodiment of the present application, DMRS ports are respectively configured for two different frequency domain resources, which are configured in the frequency domain resources used for carrying signals between the network device and the terminal device and are not used for carrying data, so that flexible resource configuration in the frequency domain is achieved, waste of DMRS port resources is avoided, and flexibility of resource scheduling is improved.

A sixth possible implementation manner, when DMRStype2 is used, there are 3 configurations of the number of DMRS CDM groups not used for carrying data, that is, the number of DMRS CDM groups not used for carrying data is 1,2, or 3, the first frequency domain resource includes a first sub-frequency domain resource, a second sub-frequency domain resource, and a third sub-frequency domain resource, and the number of DMRS CDM groups not used for carrying data corresponding to the three sub-frequency domain resources is different, and on the basis of the third possible implementation manner, the following differences exist: and the terminal equipment determines the number of the DMRS CDM groups which are not used for carrying data of the third sub-frequency-domain resource according to the configuration of the number of the DMRS CDM groups which are not used for carrying data of the first sub-frequency-domain resource and the second sub-frequency-domain resource.

For the sixth possible implementation manner, in the embodiment of the present application, DMRS ports are respectively configured for two different frequency domain resources, which are configured in frequency domain resources carrying signals transmitted by network devices and terminal devices and are not used for carrying data, so that flexible resource configuration in the frequency domain is achieved, waste of DMRS port resources is avoided, and flexibility of resource scheduling is improved.

A seventh possible implementation manner is suitable for flexibly scheduling 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, for flexibly scheduling the number of DMRS CDM groups not used for carrying data corresponding to each first resource block group on the first frequency domain resource, or, when the number of DMRS CDM groups using DMRS type2 and not used for carrying data only includes two configuration cases, for flexibly scheduling the number of DMRS CDM groups not used for carrying data corresponding to each first resource block group on the first frequency domain resource.

It should be noted that, in the following description, the seventh possible implementation is described by taking only the number of the pre-DMRS symbols as an example, and the "number of pre-DMRS symbols" in the following scheme may also be replaced by "the number of DMRS CDM groups not used for carrying data".

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.

Optionally, 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, 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 contents indicated by the second indication information and the third indication information are respectively described below by way of example.

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

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

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

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

The scheme of example 1 is described in detail below with reference to fig. 7. As shown in fig. 7, there are 4 first resource block groups, which are first

resource block groups

0,1, 2, and 3, and their indexes are 0,1, 2, and 3, respectively. The first resource block group with the smallest index is the first resource block group 0. Assuming that the third indication information is used to indicate that the number of the 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 the pre-DMRS symbols of the first

resource block group

1,2 is different from the number of the pre-DMRS symbols of the first resource block group 0, the terminal device determines that the number of the pre-DMRS symbols of the first

resource block group

1,2 is 2 according to the second indication information, and further, the terminal device determines that the number of the pre-DMRS symbols of the first resource block group 3 is 1. Subsequently, the terminal device receives the PDSCH on the first frequency-domain resource according to the configuration of the preamble DMRS symbol on the first frequency-domain resource in S602.

According to the embodiment of the application, the DMRS ports or the DMRS CDM groups which are not used for carrying data are respectively configured for the two parts of frequency domain resources which are configured in the frequency domain resources carrying signals of the network equipment and the terminal equipment and have different numbers of the DMRS CDM groups which are not used for carrying data, so that flexible resource configuration in the frequency domain is realized, the waste of the DMRS port resources is avoided, and the flexibility of resource scheduling is improved.

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

Fig. 9 is a schematic block diagram of a communication apparatus for resource configuration provided in 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.

The transceiver module 11 may be configured to receive information sent by other apparatuses, and may also be configured to send information to other apparatuses. Such as receiving the first indication or sending the second indication. The processing module 12 may be used to perform content processing of the device, such as obtaining pattern information.

In one possible design, the communication device 10 may correspond to the network equipment in the above-described method embodiment.

Specifically, the communication apparatus 10 may correspond to the network device in the method 600 according to the embodiment of the present application, the communication apparatus 10 may include a module for performing the operation performed by the network device in the corresponding method, and each unit in the communication apparatus 10 is respectively for implementing the operation performed by the network device in the corresponding method.

Illustratively, when the communication device 10 corresponds to the network device in the method 600, the transceiver module 11 is configured to execute 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 transceiver module 11 is further configured to send a physical downlink shared channel PDSCH on the first frequency domain resource; the first number of the PDSCH is different from the second number of the PDSCH, the first frequency-domain resource includes a first sub-frequency-domain resource and a second sub-frequency-domain resource, the first number is the number of DMRS symbols of a preamble demodulation reference signal corresponding to the first sub-frequency-domain resource, the second number is the number of DMRS symbols corresponding to the second sub-frequency-domain resource, or the first number is the number of DMRS Code Division Multiplexing (CDM) groups not used for carrying data corresponding to the first sub-frequency-domain resource, and the second number is the number of DMRS CDM groups not used for carrying data corresponding to the second sub-frequency-domain resource.

The transceiver 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 of the first frequency domain resource except the first sub-frequency domain resource.

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 a frequency domain resource, which belongs to the first sub-frequency domain resource, in another frequency domain resource except the second frequency domain resource in the first frequency 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, 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, other resource block groups in the second frequency domain resource except the one or more first resource block groups belong to the second sub-frequency domain resource, or the second sub-indication information is used to indicate one or more second resource block groups in the second frequency domain resource, the one or more second resource block groups belong to the second sub-frequency domain resource, other resource block groups in the second frequency domain resource except the one or more second resource block groups belong to the first sub-frequency domain resource, or the second sub-indication information is used to indicate the number of pre-symbols or the number of DMRS groups not used for carrying data corresponding to each of the second frequency domain resource block group, wherein the number of pre-symbols or the number of DMRS groups not used for carrying data in the second frequency domain resource block group belongs to the CDM, the number of DMRS symbols or the CDM sub-groups in the second frequency domain resource group belongs to the second sub-frequency domain resource, or the number of DMRS resources not used for carrying data, wherein the CDM is used for the CDM.

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 conditions: 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, where N belongs to a preset second number set; the relation 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.

Wherein, the device still includes: a processing module 12, configured to obtain pattern information, where 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, and each pattern is used to indicate a number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or a number of DMRS groups that are not used for carrying data; the processing module 12 is further configured to determine a first index value according to the pattern information and the number of preamble DMRS symbols or the number of DMRS CDM groups not used for carrying data corresponding to each resource block group in the second frequency domain resource, where the first indication information includes the first index value.

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

The transceiver 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 a terminal device in the above-described method embodiment.

Specifically, the communication apparatus 10 may correspond to the terminal device in the method 600 according to the embodiment of the present application, the communication apparatus 10 may include means for performing the operation performed by the terminal device in the corresponding method, and each unit in the communication apparatus 10 is respectively configured to implement the operation performed by the terminal device in the corresponding method.

Illustratively, when the communication device 10 corresponds to the terminal device in the method 600, the transceiver module 11 is configured to execute 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 further configured to receive a PDSCH on a first frequency domain resource based on the first indication information, where a first number of the PDSCH is different from a second number of the PDSCH, the first frequency domain resource includes a first sub-frequency domain resource and a second sub-frequency domain resource, the first number is the number of DMRS symbols corresponding to the first sub-frequency domain resource, the second number is the number of DMRS symbols corresponding to the second sub-frequency domain resource, or the first number is the number of DMRS Code Division Multiplexing (CDM) groups not used for carrying data corresponding to the first sub-frequency domain resource, and the second number is the number of DMRS CDM groups not used for carrying data corresponding to the second sub-frequency domain resource.

The transceiver 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.

The transceiver module 11 is further configured to receive second indication information, where the second indication information is used to indicate a frequency domain resource belonging to the first sub-frequency domain resource in the other frequency domain resources except the second frequency domain resource in the first frequency 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, 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, other resource block groups in the second frequency domain resource except the one or more resource block groups belong to the second sub-frequency domain resource, or the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, the one or more resource block groups belong to the second sub-frequency domain resource, other resource block groups in the second frequency domain resource except the one or more resource block groups belong to the first sub-frequency domain resource, or the second sub-indication information is used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of dmdm groups not used for carrying data, wherein the number of pre-DMRS symbols in the second frequency domain resource or the number of dmdm groups not used for carrying data belonging to the DMRS groups in the second frequency domain resource belongs to the first sub-frequency domain resource block group, and the number of pre-DMRS symbols or the dmdm groups not belonging to the second frequency domain resource group not belonging to the DMRS belongs to the second frequency domain resource.

Wherein, the device still includes: a processing module 12, configured to obtain pattern information, where 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, 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 that are not used for carrying data; the first indication information includes a first index value, and the processing module 12 is further configured to determine, according to a pattern corresponding to the first index value, the number of pre-DMRS symbols or the number of DMRSCDM groups that are not used for carrying data, corresponding to each resource block group in the second frequency domain resource.

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 corresponding relationship, and the third frequency domain resource includes the first frequency domain resource.

The transceiver 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 according to an embodiment of the present application.

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

In one possible design, the apparatus 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 a wireless modem, and various types of terminals, mobile stations, terminals, user equipment, soft terminals, and the like, and may also be a chip or a chip system located on the terminal device.

The apparatus 20 may include a processor 21 (i.e., an example of a processing module) and a memory 22. The memory 22 is used for storing instructions and the processor 21 is used for executing the instructions stored by the memory 22 to make the apparatus 20 implement the steps performed by the devices in the various possible designs as described above in the corresponding methods in fig. 4 to 9.

Further, the apparatus 20 may further include an input port 23 (i.e., one example of a transceiver module) and an output port 24 (i.e., another example of a transceiver module). Further, the processor 21, memory 22, input port 23 and output port 24 may communicate with each other via internal connection paths, passing control and/or data signals. The memory 22 is used for storing a computer program, and the processor 21 may be used for calling and running the computer program from the memory 22 to control the input port 23 to receive a signal and the output port 24 to send a signal, so as to complete the steps of the method described above for the terminal device, the radio access network device, the UE, or the base station. The memory 22 may be integrated in the processor 21 or may be provided separately from the processor 21.

Alternatively, if the message transmitting 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 the same physical entity, may be collectively referred to as a transceiver.

Alternatively, 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 manner, the functions of the input port 23 and the output port 34 may be realized by a transceiver circuit or a dedicated chip for transceiving. The processor 21 may be considered to be implemented by a dedicated processing chip, processing circuitry, a processor, or a general purpose chip.

As another implementation manner, the device provided by the embodiment of the application can be realized by using a general-purpose computer. Program codes that will implement the functions of the processor 21, the input port 23 and the output port 24 are stored in the memory 22, and the functions of the processor 21, the input port 23 and the output port 24 are implemented by the processor by executing the codes in the memory 22.

Each module or unit in the apparatus 20 may be configured to execute each action or processing procedure executed by a device (e.g., a terminal device) performing random access in the foregoing method, and a detailed description thereof is omitted here for avoiding repeated description.

For the concepts, explanations, detailed descriptions and other steps related to the technical solutions provided in the embodiments of the present application related to the apparatus 20, please refer to the descriptions of the foregoing methods or other embodiments, which are not repeated herein.

It should be understood that in the embodiments of the present application, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. 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 further provides a computer-readable storage medium, on which computer instructions for implementing the method performed by the network device or the terminal device in the above method embodiment are stored.

For example, the computer program, when executed by a computer, causes the computer to implement the method performed by the network device or the terminal device in the above-described method embodiments.

It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application. It will be clear to those skilled in the art that, for the convenience and brevity of description, the specific working procedures of the systems, devices and units described above may refer to the corresponding procedures in the foregoing method embodiments and will not be described again here. In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The functions, if implemented in software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall cover the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of resource allocation, comprising:

receiving first indication information from a network device, wherein the first indication information is used for indicating first frequency domain resources;

receiving a Physical Downlink Shared Channel (PDSCH) on a first frequency domain resource based on the first indication information,

wherein the first number of PDSCH is different from the second number of PDSCH, the first frequency domain resources comprise 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 the DMRS Code Division Multiplexing (CDM) groups which are not used for carrying data and correspond to the first sub-frequency domain resource, and the second number is the number of the DMRS CDM groups which are not used for carrying data and correspond to the second sub-frequency domain resource.

2. The method of claim 1, further comprising:

receiving second indication information, wherein the second indication information is used for indicating the first sub frequency domain resource in the first frequency domain resource.

3. The method of claim 1 or 2, wherein the second sub-frequency-domain resources are frequency-domain resources of the first frequency-domain resources other than the first sub-frequency-domain resources.

4. The method of claim 1, further comprising:

and receiving second indication information, where the second indication information is used to indicate a frequency domain resource, which belongs to the first sub-frequency domain resource, in other frequency domain resources except for a second frequency domain resource in the first frequency domain resource, where the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.

5. The method of claim 4,

the first indication information includes first sub-indication information and second sub-indication information, the first sub-indication information indicating 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, where the one or more resource block groups belong to the first sub-frequency domain resource, and other resource block groups in the second frequency domain resource except the one or more resource block groups belong to the second sub-frequency domain resource, or

The second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, where the one or more resource block groups belong to the second sub-frequency domain resource, and other resource block groups in the second frequency domain resource except the one or more resource block groups belong to the first sub-frequency domain resource, or

The second sub-indication information is used to indicate the number of pre-DMRS symbols or the number of DMRSCDM groups not used for carrying data corresponding to each resource block group in the second frequency domain resource, where the resource block group in the second frequency domain resource in which the number of pre-DMRS symbols or the number of DMRSCDM groups not used for carrying data is the first number belongs to the first sub-frequency domain resource, and the resource block group in the second frequency domain resource in which the number of pre-DMRS symbols or the number of DMRSCDM groups not used for carrying data is the second number belongs to the second sub-frequency domain resource.

6. The method according to claim 4 or 5, wherein the first frequency domain resources belong to third frequency domain resources, the third frequency domain resources satisfying at least one of:

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;

the relation 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, characterized in that the method further comprises:

the information of the pattern is obtained and,

the pattern information is used to indicate mapping relationships between a plurality of patterns and a plurality of index values, wherein the first frequency domain resource corresponds to the plurality of index values, or

The pattern information is used for indicating mapping relations between a plurality of patterns and a plurality of index values and corresponding relations between the first frequency domain resources and the plurality of index values,

each pattern is used for indicating the number of the pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups which are not used for carrying data;

the first indication information includes a first index value, and the number of pre-DMRS symbols or the number of DMRSCDM groups that are not used for carrying data corresponding to each resource block group in the second frequency domain resource is determined according to a pattern corresponding to the first index value.

8. The method according to any one of claims 1 to 7,

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 to the number of resource blocks included in the resource block groups satisfies a first corresponding relationship, and the third frequency domain resource includes the first frequency domain resource.

9. The method according to any one of claims 1 to 8, further comprising:

receiving third indication information, wherein the third indication information is used for indicating the first number or the second number.

10. A method of signal transmission, comprising:

sending first indication information, wherein the first indication information is used for indicating first frequency domain resources;

sending a Physical Downlink Shared Channel (PDSCH) on the first frequency domain resource;

wherein,

the first number of PDSCH is different from the second number of PDSCH, the first frequency-domain resources include first sub-frequency-domain resources and second sub-frequency-domain resources,

The first number is the number of DMRS Code Division Multiplexing (CDM) groups which are not used for carrying data and correspond to the first sub-frequency domain resource, and the second number is the number of DMRS CDM groups which are not used for carrying data and correspond to the second sub-frequency domain resource.

11. The method of claim 10, further comprising:

and sending second indication information to the terminal equipment, wherein the second information is used for indicating the first sub frequency domain resource in the first frequency domain resource.

12. The method of claim 10 or 11, wherein the second sub-frequency-domain resources are frequency-domain resources of the first frequency-domain resources other than the first sub-frequency-domain resources.

13. The method of claim 10, further comprising:

and sending second indication information to the terminal device, where the second indication information is used to indicate a frequency domain resource belonging to the first sub-frequency domain resource in the other frequency domain resources except the second frequency domain resource in the first frequency domain resource, where the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.

14. The method of claim 13,

the second sub-indication information is used to indicate one or more first resource block groups in the second frequency domain resource, where the one or more first resource block groups belong to the first sub-frequency domain resource, and other resource block groups in the second frequency domain resource except the one or more first resource block groups belong to the second sub-frequency domain resource, or

The second sub-indication information is used to indicate one or more second resource block groups in the second frequency domain resource, where the one or more second resource block groups belong to the second sub-frequency domain resource, and other resource block groups in the second frequency domain resource except the one or more second resource block groups belong to the first sub-frequency domain resource, or

15. The method according to claim 13 or 14, wherein the first frequency domain resources belong to third frequency domain resources, and wherein the third frequency domain resources satisfy at least one of:

16. The method according to claim 13 or 15, characterized in that the method further comprises:

the information of the pattern is obtained and,

the pattern information is used for indicating mapping relations between a plurality of patterns and a plurality of index values, wherein the first frequency domain resource corresponds to the plurality of index values, or

The pattern information indicating a mapping relationship between a plurality of patterns and a plurality of index values and a correspondence relationship between the first frequency domain resource and the plurality of index values,

each pattern is used for indicating the number of the preposed DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups which are not used for carrying data;

and determining a first index value according to the pattern information and the number of the pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups which are not used for carrying data, wherein the first indication information comprises the first index value.

17. The method according to any one of claims 10 to 16,

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 to the number of resource blocks included in the resource block groups satisfies a first corresponding relationship.

18. The method according to any one of claims 10 to 17, further comprising:

and sending third information to the terminal equipment, wherein the third information is used for indicating the first quantity or the second quantity.

19. A communications apparatus, comprising:

a processor and a memory;

the memory for storing a computer program;

the processor configured to execute the computer program stored in the memory to cause the communication apparatus to perform the communication method of any one of claims 1 to 9, or to perform the communication method of any one of claims 10 to 18.

20. A computer-readable storage medium, having stored thereon a computer program which, when run on a computer, causes the computer to perform the communication method according to any one of claims 1 to 9, or to perform the communication method according to any one of claims 10 to 18.

21. A chip system, comprising: a processor for calling and running a computer program from a memory so that a communication device on which the system-on-chip is installed performs the communication method of any one of claims 1 to 9, or performs the communication method of any one of claims 10 to 18.