WO2022252954A1 - Procédé et appareil de configuration de ressource - Google Patents

Procédé et appareil de configuration de ressource Download PDF

Info

Publication number
WO2022252954A1
WO2022252954A1 PCT/CN2022/092503 CN2022092503W WO2022252954A1 WO 2022252954 A1 WO2022252954 A1 WO 2022252954A1 CN 2022092503 W CN2022092503 W CN 2022092503W WO 2022252954 A1 WO2022252954 A1 WO 2022252954A1
Authority
WO
WIPO (PCT)
Prior art keywords
frequency domain
resource
domain resource
sub
dmrs
Prior art date
Application number
PCT/CN2022/092503
Other languages
English (en)
Chinese (zh)
Inventor
宣一荻
谢信乾
郭志恒
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2022252954A1 publication Critical patent/WO2022252954A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows

Definitions

  • the present application relates to the communication field, and, more specifically, relates to a resource configuration method and device.
  • the demodulation reference signal (de-modulation reference signal, DMRS) configuration of all scheduling resource blocks of the terminal device is the same, where the DMRS configuration includes the number of pre-DMRS symbols or not used to carry data The number of (code division multiplexing, CDM) groups, etc.
  • the terminal equipment performs space division multiplexing with other terminal equipment on different subbands (one or more resource blocks (resource block, RB)), and the terminal equipment on different subbands will appear Different numbers result in different numbers of spatial layers transmitted simultaneously on different subbands.
  • the network device will according to the number of pre-DMRS symbols required for the subband with the largest number of transmission space layers and the number of DMRS CDM groups not used to carry data, Uniformly configure the number of pre-DMRS symbols and the number of DMRS CDM groups not used to carry data for all subbands. For subbands with fewer transmission space layers, redundant DMRS or DMRS CDM groups not used to carry data It will occupy resources for data transmission, resulting in a waste of transmission resources and affecting communication efficiency.
  • the present application provides a method and device for resource configuration, by configuring the number of different pre-DMRS symbols or the number of DMRS CDM groups not used to carry data according to the communication needs on the scheduled frequency domain resources, so as to realize flexible allocation in the frequency domain Resource allocation, thereby saving transmission resources.
  • a resource configuration method including: receiving first indication information from a network device, where the first indication information is used to indicate a first frequency domain resource; based on the first indication information, in the first frequency domain Receiving a physical downlink shared channel (physical downlink shared channel, PDSCH) on a 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 Frequency domain resources, the first number is the number of pre-demodulation reference signal DMRS symbols corresponding to the first sub-frequency domain resource, and the second number is the number of pre-DMRS symbols corresponding to the second sub-frequency domain resource, Or the first number is the number of DMRS code division multiplexing CDM groups corresponding to the first sub-frequency domain resource that are not used to carry data, and the second number is the number of DMRS that are not used to carry data corresponding to the second sub-frequency domain resource. Number of CDM
  • the above scheme implements flexible DMRS resource allocation in the frequency domain by configuring different numbers of pre-DMRS symbols on the scheduled frequency domain resources according to communication needs, reduces resource overhead for DMRS transmission, and improves resource utilization.
  • the method further includes: receiving second indication information, where the second indication information is used to indicate the first sub-frequency domain resource in the first frequency domain resource .
  • the second sub-frequency domain resource is a frequency domain resource in the first frequency domain resource other than the first sub-frequency domain resource.
  • the method further includes: receiving second indication information, where the second indication information is used to indicate the first frequency domain resource except the second frequency domain resource A frequency domain resource belonging to the first sub-frequency domain resource among other frequency domain resources, wherein the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.
  • the second indication information only needs to indicate resources other than the predetermined frequency domain resource.
  • the resources that need to be indicated are reduced, and the size of the signaling that needs to be used can also be reduced, which can reduce signaling overhead and save resources.
  • the method further includes: receiving second indication information, where the second indication information is used to indicate the first frequency domain resource except the second frequency domain resource One or more resource block groups, where the one or more resource block groups belong to the first sub-frequency domain resource, wherein the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.
  • the second indication information only needs to indicate resources other than the predetermined frequency domain resource.
  • the resources that need to be indicated are reduced, and the size of the signaling that needs to be used can also be reduced, which can reduce signaling overhead and save resources.
  • the first indication information includes first sub-indication information and second sub-indication information, and the first sub-indication information is used to indicate the first frequency domain resource
  • the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, the one or more resource block groups belong to the first sub-frequency domain resource, except for the second frequency domain resource Other resource block groups other than the one or more resource block groups belong to the second sub-frequency domain resource, or the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, the One or more resource block groups belong to the second sub-frequency domain resource, and other resource block groups in the second frequency domain resource except the one or more resource block groups belong to the first sub-frequency domain resource, or the second sub-frequency domain resource
  • the second sub-indication information is used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMR CDM groups that are not used to carry data, wherein
  • the first frequency domain resource belongs to a third frequency domain resource
  • the third frequency domain resource satisfies at least one of the following: the resources included in the third frequency domain resource The number of blocks is not M, and the M belongs to a preset first number set; the number of resource blocks included in the third frequency domain resource is N, and the N belongs to a preset second number set; the third frequency domain resource The relationship between the number of resource blocks included and the number of resource blocks included in the first resource block group satisfies a first preset condition.
  • the method further includes: acquiring pattern information, where the pattern information is used to indicate the mapping relationship between multiple patterns and multiple index values, wherein the first The frequency domain resource corresponds to the multiple index values, or the pattern information is used to indicate the mapping relationship between the multiple patterns and the multiple index values, and the correspondence between the first frequency domain resource and the multiple index values relationship, each pattern is used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups not used to carry data; the first indication information includes a first index value , according to the pattern corresponding to the first index value, determine the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups not used to carry data.
  • the indication granularity is dynamically changed, that is, the size of the resource block group is dynamically determined, which can realize indication and scheduling with a smaller granularity, saving
  • the overhead of transmitting DMRS is reduced, and at the same time, the number of filling bits in the indication information is reduced, further reducing waste of resources.
  • the method further includes: receiving third indication information, where the third indication information is used to indicate the first quantity or the second quantity.
  • the number of resource block groups included in the second frequency domain resource is determined based on the number of resource block groups included in the first frequency domain resource.
  • the number of resource block groups included in the second frequency domain resource is less than or equal to a second threshold.
  • 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
  • the at least one first sub-frequency domain resource corresponds to at least one second DMRS port.
  • the number of a DMRS port is equal to the number of the at least one second DMRS port; when the index of any DMRS port included in the at least one first DMRS port is greater than a third threshold or any index included in the one or more second DMRS ports When the index of a DMRS port is greater than the third threshold, the DMRS ports included in the at least one first DMRS port are different from the DMRS ports included in the at least one second DMRS port; when all the DMRS ports included in the at least one first DMRS port When the index and the index of all DMRS ports included in the at least one second DMRS port are less than or equal to the third threshold, the DMRS port included in the at least one first DMRS port is the same as the DMRS port included in the at least one second DMRS port ; Wherein, the at least one first DMRS port and the at least one second DMRS port are indicated by the third indication information, or the at least one first DMRS port is indicated by the third indication
  • the two frequency domain resources configured by the network equipment with different numbers of pre-DMRS symbols are respectively configured with DMRS ports, which avoids the waste of DMRS port resources and improves resource utilization. Scheduling flexibility.
  • a signal transmission method including: sending first indication information, where the first indication information is used to indicate a first frequency domain resource; sending a physical downlink shared channel PDSCH on the first frequency domain resource; Wherein, the first number of the PDSCH is different from the second number of the PDSCH, the first frequency domain resource includes a first sub-frequency domain resource and a second sub-frequency domain resource, and the first number is the first sub-frequency domain resource
  • the number of corresponding pre-demodulation reference signal DMRS symbols the second number is the number of pre-DMRS symbols corresponding to the second sub-frequency domain resource, or the first number is the number of unused sub-frequency domain resources corresponding to the first sub-frequency domain resource
  • the second number is the number of DMRS CDM groups not used to carry data corresponding to the second sub-frequency domain resources.
  • the method further includes: sending second indication information to the terminal device, where the second information is used to indicate that the first frequency domain resource in the first frequency domain resource frequency domain resources.
  • the second sub-frequency domain resource is a frequency domain resource in the first frequency domain resource other than the first sub-frequency domain resource.
  • the method further includes: sending second indication information to the terminal device, where the second indication information is used to indicate that the first frequency domain resources except the second frequency A frequency domain resource belonging to the first sub-frequency domain resource among other frequency domain resources other than the domain resource, wherein the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.
  • the second indication information only needs to indicate resources other than the predetermined frequency domain resources, which reduces signaling overhead and saves resources.
  • the first indication information includes first sub-indication information and second sub-indication information, where the first sub-indication information is used to indicate the first frequency domain resource,
  • the second sub-indication information is used to indicate one or more first resource block groups in the second frequency domain resource, the one or more first resource block groups belong to the first sub-frequency domain resource, and the second frequency domain resource Other resource block groups in domain resources except the one or more first resource block groups belong to the second sub-frequency domain resources, or the second sub-indication information is used to indicate one or more of the second frequency domain resources a second resource block group, the one or more second resource block groups belong to the second sub-frequency domain resource, and other resource block groups in the second frequency domain resource except the one or more second resource block groups Belonging to the first sub-frequency domain resource, or the second sub-indication information is used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups not used to carry data,
  • the first frequency domain resource belongs to a third frequency domain resource
  • the third frequency domain resource satisfies at least one of the following: the resources included in the third frequency domain resource The number of blocks is not M, and the M belongs to a preset first number set; the number of resource blocks included in the third frequency domain resource is N, and the N belongs to a preset second number set; the third frequency domain resource The relationship between the number of resource blocks included and the number of resource blocks included in the first resource block group satisfies a first preset condition.
  • the first indication information can be used to indicate predetermined frequency domain resources among the scheduled frequency domain resources, further reducing signaling overhead .
  • the method further includes: acquiring pattern information, where the pattern information is used to indicate the mapping relationship between multiple patterns and multiple index values, wherein the first The frequency domain resource corresponds to the multiple index values, or the pattern information is used to indicate the mapping relationship between the multiple patterns and the multiple index values, and the correspondence between the first frequency domain resource and the multiple index values relationship, each pattern is used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups not used to carry data; according to the pattern information, and the second frequency domain resource The number of pre-DMRS symbols corresponding to each resource block group in the domain resource or the number of DMRSCDM groups not used to carry data determines a first index value, and the first indication information includes the first index value.
  • the ratio of the number of resource block groups included in the first frequency domain resource to the number of resource block groups included in the third frequency domain resource is equal to the ratio of the number of resource block groups included in the resource block group The number of resource blocks satisfies the first correspondence.
  • the indication granularity is dynamically changed, that is, the size of the resource block group is dynamically determined, which can realize indication and scheduling with a smaller granularity, saving
  • the overhead of transmitting DMRS is reduced, and at the same time, the number of filling bits in the indication information is reduced, further reducing waste of resources.
  • the method further includes: the network device sending third information to the terminal device, where the third information is used to indicate the first quantity or the second quantity.
  • the number of resource block groups included in the second frequency domain resource is determined based on the number of resource block groups included in the first frequency domain resource.
  • the number of resource block groups included in the second frequency domain resource is less than or equal to a second threshold.
  • 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
  • the at least one first sub-frequency domain resource corresponds to at least one second DMRS port.
  • the number of a DMRS port is equal to the number of the at least one second DMRS port; when the index of any DMRS port included in the at least one first DMRS port is greater than a third threshold or any index included in the one or more second DMRS ports When the index of a DMRS port is greater than the third threshold, the DMRS ports included in the at least one first DMRS port are different from the DMRS ports included in the at least one second DMRS port; when all the DMRS ports included in the at least one first DMRS port When the index and the index of all DMRS ports included in the at least one second DMRS port are less than or equal to the third threshold, the DMRS port included in the at least one first DMRS port is the same as the DMRS port included in the at least one second DMRS port ; Wherein, the at least one first DMRS port and the at least one second DMRS port are indicated by the third indication information, or the at least one first DMRS port is indicated by the third indication
  • DMRS ports are respectively configured for two parts of frequency domain resources with different numbers of pre-DMRS symbols configured in the frequency domain resources carrying network equipment and terminal equipment transmission signals, which avoids waste of DMRS port resources and improves resource scheduling efficiency. flexibility.
  • a communication device which is used to realize the functions of the terminal in the method provided in the first aspect above.
  • the functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication apparatus includes: a transceiver module, configured to receive first indication information from a network device, where the first indication information is used to indicate a first frequency domain resource;
  • the transceiver module is further configured to receive a physical downlink shared channel PDSCH on a first frequency domain resource based on the first indication information, wherein the first number of the PDSCH is different from the second number of the PDSCH, and the first frequency domain resource Including a first sub-frequency domain resource and a second sub-frequency domain resource, the first number is the number of pre-demodulation reference signal DMRS symbols corresponding to the first sub-frequency domain resource, and the second number is the number of symbols of the second sub-frequency domain
  • the number of pre-DMRS symbols corresponding to the domain resources, or the first number is the number of DMRS code division multiplexing CDM groups that are not used to carry data corresponding to the first sub-frequency domain resources, and the second number is the number of the second sub-frequency domain resources.
  • the transceiver module is further configured to receive second indication information, where the second indication information is used to indicate that the first frequency sub-frequency in the first frequency domain resource Domain resources.
  • the second sub-frequency domain resource is a frequency domain resource in the first frequency domain resource other than the first sub-frequency domain resource.
  • the transceiver module is further configured to receive second indication information, where the second indication information is used to indicate that the first frequency domain resources except the second frequency domain resources A frequency domain resource belonging to the first sub-frequency domain resource among other frequency domain resources, wherein the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.
  • the first indication information includes first sub-indication information and second sub-indication information, where the first sub-indication information is used to indicate the first frequency domain resource,
  • the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, the one or more resource block groups belong to the first sub-frequency domain resource, except for the second frequency domain resource Other resource block groups other than the one or more resource block groups belong to the second sub-frequency domain resource, or the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, the One or more resource block groups belong to the second sub-frequency domain resource, and other resource block groups in the second frequency domain resource except the one or more resource block groups belong to the first sub-frequency domain resource, or the second sub-frequency domain resource
  • the second sub-indication information is used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMR CDM groups that are not used to carry data, wherein
  • the first frequency domain resource belongs to a third frequency domain resource
  • the third frequency domain resource satisfies at least one of the following: the resources included in the third frequency domain resource The number of blocks is not M, and the M belongs to a preset first number set; the number of resource blocks included in the third frequency domain resource is N, and the N belongs to a preset second number set; the third frequency domain resource The relationship between the number of resource blocks included and the number of resource blocks included in the first resource block group satisfies a first preset condition.
  • the device further includes: a processing module configured to acquire pattern information, where the pattern information is used to indicate a mapping relationship between multiple patterns and multiple index values, Wherein, the first frequency domain resource corresponds to the multiple index values, or the pattern information is used to indicate the mapping relationship between multiple patterns and multiple index values, and the first frequency domain resource and the multiple index values Correspondence between values, each pattern is used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups not used to carry data; the first indication information Including the first index value, the processing module is further configured to determine, according to the pattern corresponding to the first index value, the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of symbols not used to carry data Number of DMRSCDM groups.
  • a processing module configured to acquire pattern information, where the pattern information is used to indicate a mapping relationship between multiple patterns and multiple index values, Wherein, the first frequency domain resource corresponds to the multiple index values, or the pattern information is used
  • the transceiving module is further configured to receive third indication information, where the third indication information is used to indicate the first quantity or the second quantity.
  • a communication device including: a transceiver module, configured to send first indication information, where the first indication information is used to indicate a first frequency domain resource;
  • the physical downlink shared channel PDSCH is sent on the frequency domain resource; wherein, the first number of the PDSCH is different from the second number of the PDSCH, the first frequency domain resource includes a first sub-frequency domain resource and a second sub-frequency domain resource, and the The first number is the number of pre-demodulation reference signal DMRS symbols corresponding to the first sub-frequency domain resource, and the second number is the number of pre-DMRS symbols corresponding to the second sub-frequency domain resource, or the first number Be the quantity of the DMRS code division multiplexing CDM group that is not used to bear data corresponding to this first sub-frequency domain resource, this second quantity is the quantity of the DMRS CDM group that is not used to bear data corresponding to this second sub-frequency domain resource.
  • the transceiver module is further configured to send second indication information to the terminal device, where the second information is used to indicate that the first frequency domain resource in the first frequency domain resource A sub-frequency domain resource.
  • the second sub-frequency domain resource is a frequency domain resource in the first frequency domain resource other than the first sub-frequency domain resource.
  • the transceiver module is further configured to send second indication information to the terminal device, where the second indication information is used to indicate that the first frequency domain resources except the first A frequency domain resource belonging to the first sub-frequency domain resource among other frequency domain resources other than the second frequency domain resource, wherein the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.
  • the first indication information includes first sub-indication information and second sub-indication information, where the first sub-indication information is used to indicate the first frequency domain resource,
  • the second sub-indication information is used to indicate one or more first resource block groups in the second frequency domain resource, the one or more first resource block groups belong to the first sub-frequency domain resource, and the second frequency domain resource Other resource block groups in domain resources except the one or more first resource block groups belong to the second sub-frequency domain resources, or the second sub-indication information is used to indicate one or more of the second frequency domain resources a second resource block group, the one or more second resource block groups belong to the second sub-frequency domain resource, and other resource block groups in the second frequency domain resource except the one or more second resource block groups Belonging to the first sub-frequency domain resource, or the second sub-indication information is used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups not used to carry data,
  • the first frequency domain resource belongs to a third frequency domain resource
  • the third frequency domain resource satisfies at least one of the following: the resources included in the third frequency domain resource The number of blocks is not M, and the M belongs to a preset first number set; the number of resource blocks included in the third frequency domain resource is N, and the N belongs to a preset second number set; the third frequency domain resource The relationship between the number of resource blocks included and the number of resource blocks included in the first resource block group satisfies a first preset condition.
  • the device further includes: a processing module configured to acquire pattern information, where the pattern information is used to indicate a mapping relationship between multiple patterns and multiple index values, Wherein, the first frequency domain resource corresponds to the multiple index values, or the pattern information is used to indicate the mapping relationship between multiple patterns and multiple index values, and the first frequency domain resource and the multiple index values Correspondence between values, each pattern is used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups not used to carry data; the processing module is also It is used to determine the first index value according to the pattern information, the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups not used to carry data, and the first indication information includes The first index value.
  • the ratio of the number of resource block groups included in the first frequency domain resource to the number of resource block groups included in the third frequency domain resource is equal to the ratio of the number of resource block groups included in the resource block group The number of resource blocks satisfies the first correspondence.
  • the transceiving module is further configured to send third information to the terminal device, where the third information is used to indicate the first quantity or the second quantity.
  • a communication device including: a processor and a memory; the memory is used to store a computer program; the processor is used to execute the computer program stored in the memory, so that the communication device executes the first Aspect or the communication method of the second aspect.
  • a computer-readable storage medium is provided.
  • a computer program is stored on the computer-readable storage medium.
  • the computer program is run on a computer, the computer is made to execute the communication method of the first aspect or the second aspect. .
  • a chip system including: a processor, configured to invoke and run a computer program from a memory, so that a communication device installed with the chip system executes the communication method of the first aspect or the second aspect.
  • the present application provides a computer program product, the computer program product includes a computer program, and when the computer program runs, the method performed by the terminal device in the above first aspect is executed, or the above first aspect is executed. The method performed by the network device of the two aspects is performed.
  • Fig. 1 shows a schematic diagram of an example of a DMRS pattern in a 5G system.
  • Fig. 2 shows a schematic diagram of two time slots configured with different numbers of preamble DMRS symbols.
  • Fig. 3 shows a schematic diagram of configuring two time slots with different numbers of DMRS CDM groups not used to carry data.
  • Figure 4 shows the waste of resources caused by configuring the same number of pre-DMRS symbols in the frequency domain.
  • Fig. 5 shows the waste of resources caused by configuring the same number of DMRS CDM groups not used to carry data in the frequency domain.
  • FIG. 6 shows a schematic interaction diagram of a resource configuration method 600 provided by the present application.
  • Fig. 7 shows a schematic diagram of an example of a first frequency domain resource.
  • Fig. 8 shows a schematic diagram of another example of the first frequency domain resource.
  • Fig. 9 is a schematic block diagram of a communication device for sending information provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of an information sending device 20 provided by an embodiment of the present application.
  • a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • an application running on a computing device and the computing device can be components.
  • One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers.
  • these components can execute from various computer readable media having various data structures stored thereon.
  • a component may, for example, be based on a signal having one or more packets of data (e.g., data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet via a signal interacting with other systems). Communicate through local and/or remote processes.
  • packets of data e.g., data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet via a signal interacting with other systems.
  • Terminal also known as user equipment (UE), mobile station (MS), or mobile terminal (MT) is a device that provides voice/data connectivity to users Devices, for example, handheld devices with wireless connection functions, or vehicle-mounted devices, etc.
  • UE user equipment
  • MS mobile station
  • MT mobile terminal
  • examples of some terminals are: mobile phone (mobile phone), tablet computer, notebook computer, palmtop computer, mobile internet device (mobile internet device, MID), wearable device, virtual reality (virtual reality, VR) device, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, smart grid wireless terminals in transportation safety (transportation safety), wireless terminals in smart city (smart city), or wireless terminals in smart home (smart home), etc.
  • UE user equipment
  • MS mobile station
  • MT mobile terminal
  • the network device is a device in the wireless network, such as a radio access network (radio access network, RAN) node that connects the terminal to the wireless network.
  • RAN nodes are: gNB, transmission reception point (transmission reception point, TRP), evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), node B (Node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), base band unit (base band unit , BBU), or wireless fidelity (wireless fidelity, Wifi) access point (access point, AP), etc.
  • the network device may include a centralized unit (centralized unit, CU) node, or a distributed unit (distributed unit, DU) node, or a RAN device including a CU node and a DU node.
  • a centralized unit centralized unit, CU
  • DU distributed unit
  • RAN device including a CU node and a DU node.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA broadband code division multiple access
  • general packet radio service general packet radio service, GPRS
  • long term evolution long term evolution, LTE
  • LTE frequency division duplex frequency division duplex, FDD
  • LTE Time Division Duplex TDD
  • Universal Mobile Telecommunications System UMTS
  • Worldwide Interoperability for Microwave Access WiMAX
  • 5G System or New Radio, NR 5G System or New Radio, NR
  • the fixed wireless access (FWA) network relying on long term evolution (long term evolution, LTE) and 5G NR (new radio, NR) technology, through indoor or outdoor customer premises equipment (CPE) to End users are provided with wireless LAN or limited LAN access.
  • CPE can provide Internet, landline telephone, TV, smart home and other services to end users.
  • the downlink communication from the network device to the CPE is usually based on the transmission of large data packets, and the base station needs to schedule more spectrum resources for the CPE to meet its rate requirements.
  • there are many obstacles indoors and the multipath effect is serious there will be strong frequency selective fading of the channel.
  • the multiple access method usually adopts the orthogonal frequency division multiple access (OFDMA) method.
  • OFDMA orthogonal frequency division multiple access
  • the main feature of OFDMA is that the transmission resources are divided into mutually orthogonal time-frequency resource elements (resource elements, REs). are orthogonal to each other, so that the receiving end can separately receive the signal sent on each RE.
  • REs resource elements
  • the signal carried by the RE will be distorted after being transmitted through the channel, and the channel distortion is usually called a channel coefficient.
  • the receiving end needs to estimate the channel coefficients.
  • the process of obtaining channel information at the receiving end can also be called channel estimation.
  • a channel estimation scheme based on reference signals is usually used, that is, the transmitting end When a known signal is transmitted on a specific RE, the receiving end estimates the channel coefficient based on the received signal and the known signal, and interpolates the channel coefficient on other REs based on the channel coefficient obtained by this estimation, and then the data signal Perform reception demodulation.
  • the base station is equipped with multiple antennas to realize spatial multiplexing transmission using multi-input multi-output (MIMO) technology, that is, multiple data streams are transmitted on the same time-frequency resource. , each data stream is transmitted on an independent spatial layer, and each spatial layer will be mapped to a different antenna port for transmission.
  • MIMO multi-input multi-output
  • the channel coefficients between different antenna ports and terminal devices are not the same, in order for the receiving end to obtain information transmitted on multiple spatial layers, it is necessary to estimate the channel coefficient between each antenna port and the terminal, so it is necessary for each Different DMRSs are configured for each antenna port, and the DMRSs corresponding to different antenna ports can be multiplexed by means of time division, frequency division, and code division. Exemplarily, as shown in FIG.
  • the total number of DMRS ports is 6, and the number of CDM groups is 3.
  • the horizontal direction represents the time domain
  • the vertical direction represents the frequency domain
  • each small square represents a RE, where DMRS ports 0 and 1 are multiplexed by orthogonal codes, so the REs corresponding to these two ports are also called a code Division multiplexing (code division multiplexing, CDM) group.
  • CDM code division multiplexing
  • Subcarrier In a communication system using orthogonal frequency division multiplexing (OFDM) technology, frequency domain resources are divided into several subresources, and each subresource in the frequency domain can be called a subcarrier.
  • a subcarrier can also be understood as the minimum granularity of frequency domain resources.
  • the OFDM technology is a multi-carrier modulation technology.
  • Subcarrier spacing In a communication system using OFDM technology, the interval value between the center positions or peak positions of two adjacent subcarriers in the frequency domain.
  • the subcarrier spacing in the LTE system is 15kHz
  • the subcarrier spacing in the NR system in 5G can be 15kHz, or 30kHz, or 60kHz, or 120kHz, etc.
  • Resource block N consecutive subcarriers in the frequency domain can be called a resource block.
  • a resource block in the LTE system includes 12 subcarriers
  • a resource block in the NR system in 5G also includes 12 subcarriers.
  • the number of subcarriers included in a resource block may also be other values.
  • Time unit It is a time domain concept or a unit in the time domain.
  • a time unit can be one or more subframes, one or more time slots, or one or more OFDM time symbols.
  • the 5G NR system For example, the corresponding time slot length is 1 ms, and the time slot length corresponding to 30 kHz subcarrier interval is 0.5 ms.
  • a symbol can also be referred to as a symbol for short, which is the smallest time unit in the time domain of an OFDM system.
  • Time-frequency resource unit The smallest time-frequency resource granularity in OFDM system, which is one OFDM symbol in the time domain and one subcarrier in the frequency domain.
  • Subband one subband includes one or more resource blocks in the frequency domain, or one subband may include one or more resource block groups in the frequency domain. Since each resource block group also includes multiple resource blocks, the size of one subband may be the same as or different from that of one resource block group. When a subband has the same size as a resource block group, the subband can also be understood as a resource block group.
  • Antenna port In the 5G NR system, the antenna port is a logical port for transmission, and one antenna port includes multiple physical antennas. From the perspective of the receiving end, each antenna port corresponds to an independent wireless channel.
  • the base station is equipped with multiple antennas to realize spatial multiplexing transmission using MIMO technology, that is, multiple different data streams are transmitted on the same time-frequency resource, and each unrelated Data streams are transmitted on an independent spatial layer, and each spatial layer is mapped to a different antenna port for transmission.
  • Resource block group One or more resource blocks form a resource block group (RBG).
  • RBG resource block group
  • the size of RBG is configured through high-level parameters. It should be noted that the size of the RBG mentioned in this application is understood as the number of resource blocks included in the RBG, and the size of a certain frequency domain resource mentioned in this application is also understood as the number of RBs included in the frequency domain resource .
  • the resource block group included in a certain frequency domain resource mentioned in this application, or the resource block group or the first resource block group in the first resource block group included in a certain frequency domain resource can be understood as the resource block group included in the frequency domain resource. Unit resource block group.
  • Partial bandwidth (bandwidth part, BWP): It can also be called the bandwidth part.
  • BWP bandwidth part
  • some frequency domain resources in the carrier can be configured for terminal equipment for data transmission, without requiring all frequency domain resources in the carrier.
  • the downlink data channel supports two types of frequency domain resource allocation: type 0 and type 1.
  • the type 0 type is discontinuous frequency domain resource allocation
  • the type 1 type is continuous frequency domain resource allocation.
  • DCI downlink control information
  • the frequency domain resource allocation used by the PDSCH can also be directly determined through the high layer signaling parameter resourceAllocation.
  • the type 0 type indicates the resource block groups allocated to the PDSCH in the BWP through a bitmap or a bitmap
  • the type 1 type indicates resource blocks with consecutive numbers allocated to the PDSCH in the BWP through the RIV.
  • resource blocks can be understood as consecutively numbered virtual resource blocks.
  • the RIV is used to indicate the starting resource block number RB start allocated to the UE PDSCH and the length L RBs of the allocated continuous resource blocks. In the existing 3GPP standard TS 38.214, the calculation formula of RIV is as follows:
  • DMRS The demodulation reference signal is a reference signal used to restore the received signal.
  • DMRS is a signal known to both the sending end and the receiving end.
  • the sending end transmits the DMRS and data to the receiving end through the same port and wireless channel , the receiving end obtains the channel coefficient according to the DMRS in the received signal, and demodulates and decodes the received signal according to the channel coefficient to obtain the transmitted data.
  • the receiving end considering that the channel coefficients from different antenna ports to terminals are not the same, in order for the receiving end to obtain information transmitted on multiple spatial layers, it is necessary to estimate the channel coefficients between each antenna port and the terminal. Therefore, different DMRSs need to be configured for each antenna port, and the DMRSs corresponding to different antenna ports can be multiplexed by means of time division, frequency division, and code division.
  • the DMRS includes a pre-DMRS and an additional DMRS, and the pre-DMRS is usually configured in front of a physical downlink shared channel (physical downlink shared channel, PDSCH) in a time slot.
  • a 1-symbol pre-DMRS or a 2-symbol pre-DMRS can be configured in the time domain.
  • the 2-symbol pre-DMRS can support more DMRS ports to transmit more spatial layers.
  • the 5G NR system configures the maximum number of pre-symbols of DMRS through the high-level parameter maxlength. maxlength can be 1 or 2. When maxlength is configured as 1, it means that the pre-DMRS occupies at most 1 symbol.
  • the network device dynamically indicates the number of symbols occupied by the pre-DMRS of each time slot through the antenna port field in the downlink control information (DCI), that is, the network device passes the antenna port
  • DCI downlink control information
  • the "number of front-load symbols" indicated by the field determines the number of symbols occupied by the front-load DMRS.
  • Fig. 2 shows two time slots configured with different numbers of preamble DMRS symbols.
  • DCI indicates time slot 1, and configures 2 symbol pre-DMRS
  • DCI indicates time slot 2 Configure 1-symbol pre-DMRS
  • NR supports two DMRS pilot types, DMRS Type1 and DMRS Type2.
  • CDM groups There are two CDM groups in DMRS Type1.
  • single-symbol DMRS When single-symbol DMRS is used, it supports up to 4 DMRS ports, and each CDM group supports 2 DMRS port multiplexing through frequency domain code division multiplexing; when double-symbol For DMRS, it supports up to 8 DMRS ports, and each CDM group supports multiplexing of 4 DMRS ports through time domain and frequency domain code division multiplexing.
  • CDM groups in DMRS Type 2 When using single-symbol DMRS, it supports up to 6 DMRS ports.
  • Each CDM group supports multiplexing of 2 DMRS ports through frequency domain code division multiplexing; when using double-symbol For DMRS, it supports up to 12 DMRS ports, and each CDM group supports multiplexing of 4 DMRS ports through time domain and frequency domain code division multiplexing.
  • the CDM group that is not used to transmit DMRS can be used to transmit data signals. Therefore, the network device will also pass the "DMRS CDM group that is not used to carry data" indicated by the "antenna port” field in DCI. Quantity" to inform the UE which DMRS ports in the CDM group are used by other users. In this way, during data mapping, the terminal can avoid REs that map its own and other UE reference signals.
  • the indicated number of DMRS CDM groups not used to carry data is 1, it indicates that only CDM group 0 is used to carry DMRS, and REs corresponding to other CDM groups are used to transmit data.
  • FIG. 3 shows two time slots configured with different numbers of DMRS CDM groups that are not used to carry data.
  • DCI indicates that UE0 has two CDM groups that are not used for data transmission, that is, CDM groups 0 and 1, CDM group 0 is used to transmit DMRS of UE0, and CDM group 1 is used for transmission
  • the DCI indicates that UE0 has one CDM group that is not used for data transmission, that is, CDM group 0, and CDM group 0 transmits the DMRS of UE0.
  • the number of DMRS code division multiplexing CDM groups not used to bear data can also be understood as the number of CDM groups used to bear DMRS.
  • the resources that can be used for Type 1 DMRS can be divided into 2 CDM groups, and the resources that can be used to carry Type 2 DMRS can be divided into 3 CDM groups.
  • the DMRS CDM group that is not used to carry data The CDM group used to carry DMRS and the CDM group used to carry data can be determined. For example, taking the Type 2 DMRS as an example, the resources capable of carrying DMRS are divided into 3 CDM groups, that is, CDM groups 0, 1 and 2.
  • CDMs not used to carry data When the number of CDMs not used to carry data is 3, that is, only CDM groups 0, 1 and 2 are used to carry DMRS, and any CDM group is not used to carry data; when the number of CDMs not used to carry data is 2, that is, only CDM groups 0 and 1 are used to carry DMRS, and CDM group 2 is used to carry data.
  • the current DMRS configuration used in the communication between the network device and the terminal device will be introduced below.
  • the demodulation reference signal DMRS configuration of all scheduling resource blocks of the terminal device is the same.
  • the DMRS configuration here includes the number of pre-DMRS symbols, the number of DMRS CDM groups not used to carry data, etc.
  • the scheduling resource block here can be understood as a resource block allocated to the scheduled UE for data transmission.
  • the terminal equipment performs space division multiplexing with other terminal equipment on different subbands (one or more RBs), and the terminal equipment on different subbands will appear Different numbers result in different numbers of spatial layers transmitted simultaneously on different subbands.
  • the network device will uniformly configure the preamble symbols of all subbands according to the number of preamble DMRS symbols required for the subband with the largest number of transmission space layers and the number of DMRS CDM groups not used to carry data. Setting the number of DMRS symbols and the number of DMRS CDM groups that are not used to carry data results in a waste of transmission resources for subbands in which the number of transmission space layers is small.
  • Fig. 4 shows resource waste caused by configuring the same number of preamble DMRS symbols in the frequency domain.
  • there are a total of 8 subbands in the frequency domain numbered from subband 1 to subband 8.
  • subband pairing that is, when the terminal device performs space division multiplexing in units of subbands, the 8 subbands There are 7 corresponding UEs, numbered UE 0 to UE 6.
  • each UE transmits data of at most 1 spatial layer on each subband, as shown in Figure 4, taking subband 7 as an example, UE0 to UE6 transmit data of 1 spatial layer on subband 7, and on subband 7
  • the subband with the largest number of spatial layers is subband 7, and the network device configures a pre-DMRS of 2 symbols according to the number of spatial layers on subband 7.
  • FIG. 5 shows resource waste caused by configuring the same number of DMRS CDM groups not used to bear data in the frequency domain.
  • there are a total of 8 subbands in the frequency domain numbered from subband 1 to subband 8.
  • subband pairing that is, when the terminal device performs space division multiplexing in units of subbands, the 8 subbands There are 7 corresponding UEs, numbered UE 0 to 6.
  • each UE transmits data of at most 1 spatial layer on each subband, as shown in Figure 5, taking subband 7 as an example, UE0 to UE6 transmit data of 1 spatial layer on subband 7, and on subband 7
  • the subband with the largest number of spatial layers is subband 7, and the network device configures two CDM groups that are not used for data transmission according to the number of spatial layers on subband 7.
  • only one CDM group not used for data transmission can meet the transmission requirements. When two CDM groups not used for data transmission are configured, transmission resources are wasted.
  • the present application hopes to propose a resource allocation method to realize flexible resource allocation of the number of pre-DMRS symbols in the frequency domain and/or the number of DMRS CDM groups not used to carry data, thereby saving transmission resources.
  • FIG. 6 shows a schematic interaction diagram of a resource configuration method 600 provided by the present application.
  • Method 600 may include the following steps.
  • 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.
  • the first frequency domain resource here may be understood as a resource configured by the scheduled UE, or may be understood as a frequency domain resource used to carry a downlink signal sent by the network device to the terminal device.
  • the first frequency domain resource belongs to the BWP.
  • the network device indicates the first frequency domain resource to the terminal device through the "frequency domain resource allocation" field in the DCI.
  • the network device sends the PDSCH on the first frequency domain resource, and correspondingly, the terminal device receives the PDSCH on the first frequency domain resource.
  • the first number of PDSCHs is different from the second number of PDSCHs
  • the first frequency domain resources include first sub-frequency domain resources and second sub-frequency domain resources.
  • the first number is the number of DMRS code division multiplexing CDM groups corresponding to the first sub-frequency domain resources that are not used to carry data
  • the second number is the number of CDM groups that are not used to carry data corresponding to the second sub-frequency domain resources the number of DMRS CDM groups, or
  • the first number is the number of pre-demodulation reference signal DMRS symbols corresponding to the first sub-frequency domain resource and the number of DMRS code division multiplexing CDM groups not used to carry data
  • the second number is the number of the first sub-frequency domain resource The number of pre-DMRS symbols corresponding to the two sub-frequency domain resources and the number of DMR CDM groups not used to carry data.
  • the number of pre-demodulation reference signal DMRS symbols corresponding to the first sub-frequency domain resource is the same as the number of pre-DMRS symbols corresponding to the second sub-frequency domain resource
  • the numbers are different, and the number of DMRSCDM groups not used to bear data corresponding to the first sub-frequency domain resource is different from the number of DMRSCDM groups not used to bear data corresponding to the second sub-frequency domain resource.
  • the network device sends second indication information to the terminal device, and correspondingly, the terminal device receives second indication information from the network device, where the second indication information is used to indicate the first frequency domain resource in the first frequency domain resource.
  • the second indication information is used to indicate the first frequency domain resource in the first frequency domain resource.
  • a sub-frequency domain resource is used to indicate the first frequency domain resource in the first frequency domain resource.
  • the second sub-frequency domain resource is a frequency domain resource in the first frequency domain resource except the first sub-frequency domain resource.
  • the terminal device may determine the first sub-frequency domain resource and the second sub-frequency domain resource according to the first sub-frequency domain resource indicated by the second indication information.
  • the following takes the two resource allocation manners as examples to introduce in detail how the second indication information indicates the first sub-frequency domain resource.
  • the second indication information indicates the first sub-frequency domain resource in the first frequency domain resource in the form of a bitmap (for example, resource allocation mode of type0 type). Specifically, the second indication information indicates that one or more first resource block groups in the first frequency domain resources are the first sub-frequency domain resources.
  • the first resource block group here includes one or more RBs.
  • Fig. 7 shows a schematic diagram of the first frequency domain resource.
  • the first frequency domain resource includes 8 RBs, RB0 to RB7, the size (size) of a first resource block group is 2 RBs, and the first frequency domain resource includes 4 first resource block groups, The first resource block group 0 to the first resource block group 3 .
  • the second indication information sent by the network device indicates to the terminal device that the first resource block group 1 is the first sub-frequency domain resource.
  • the terminal device determines the number and position of the first resource block group included in the first frequency domain resource according to the number of RBs included in the first frequency domain resource and the size of the first resource block group, and then can determine according to the second indication information Find the location of the first sub-frequency domain resource.
  • the second indication information indicates one or more consecutive resources in the first frequency domain resource through a resource indicator value (RIV).
  • RIV resource indicator value
  • the first resource block group here includes one or more RBs.
  • the network device indicates a RIV, such as RIV2, through the second indication information.
  • the terminal device determines the number and position of the first resource block group included in the first frequency domain resource according to the number of RBs included in the first frequency domain resource and the size of the first resource block group, and then according to the starting first resource corresponding to RIV2
  • the sequence number of the block group (RB start ) and the number of consecutively allocated first resource block groups (L RBs ) determine the position of the first sub-frequency domain resource.
  • the above-mentioned first resource block group can be understood as an RBG configured by a high-level parameter in 5G NR, and can also be understood as another form of resource block group. Taking four possible ways as examples below, the implementation way of determining the size (size) of the first resource block group will be introduced in detail. Among them, possible mode 3 can be applied to the above-mentioned mode 1 and mode 2, and possible modes 1, 2 and 4 can only be applied to the above-mentioned mode 1.
  • the size of the first resource block group is the size of the RBG configured by the high layer parameter (rbg-size). That is, the number of resource blocks included in the first resource block group is the number of resource blocks indicated by the high layer parameter (rbg-size).
  • the size of the resource block group mentioned in this application can be understood as the number of resource blocks included in the resource block group.
  • the definition of the first resource block group continues to use the existing RBG, and compared with other possible methods, the modification of the existing protocol is minimal.
  • the size of the first resource block group dynamically changes with the number of RBGs included in the first frequency domain resource.
  • the size of the first resource block group may be determined according to the number of RBGs included in the first frequency domain resource.
  • the size of the first resource block group changes dynamically with the number of scheduled resource block groups.
  • the ratio of the number of resource block groups included in the first frequency-domain resource to the number of resource block groups included in the third frequency-domain resource and the number of resource blocks included in the resource block group satisfy the first corresponding relationship, so
  • the third frequency domain resource includes the first frequency domain resource, and the size of the first resource block group is determined according to the first correspondence. Then, the ratio of the size of the first resource block group to the number of RBGs included in the first frequency domain resource and the number of RBGs included in the BWP satisfies the first corresponding relationship, or, the size of the first resource block group is based on the first frequency domain The ratio of the number of RBGs included in the resource to the number of RBGs included in the BWP is determined.
  • the third frequency domain resource is BWP or active bandwidth part or bandwidth.
  • the size of the first resource block group is the size of the RBG indicated by the high layer parameter rbg-size.
  • the size of the first resource block group is the size of the RBG indicated by the high-level parameter rbg-size
  • the RBG size indicated by the high-level parameter rbg-size is the number of RBGs included in the first frequency domain resource, is the number of RBGs included in the BWP.
  • 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.
  • the size of the first resource block group is the size of the RBG indicated by the high-level parameter rbg-size; when the number of RBGs included in the first frequency domain resource is less than or equal to the number of RBGs included in the BWP and greater than the number of RBGs included in the BWP When , the size of the first resource block group is the size of RBG When the number of RBGs included in the first frequency domain resource is less than or equal to the number of RBGs included in the BWP When , the size of the first resource block group is the size of RBG
  • the terminal device needs to perform blind detection on all available DCIs.
  • Blind detection of DCIs of the same length requires only one configuration
  • blind detection of DCIs of different lengths requires different configurations
  • the number of blind detections is more than that of blind detection of DCIs of the same length.
  • the terminal device needs to use the configuration when the DCI length is 4 to blindly detect the DCI n times, and The DCI needs to be blindly detected n times according to the configuration when the DCI length is 2.
  • the terminal device can blindly detect the DCI n times only by using the configuration when the DCI length is 4 bits. Therefore, in order to reduce the number of times the terminal device blindly detects the DCI, the number of candidate values for the length of the DCI should be as small as possible.
  • the length of the second indication information should be a fixed value, where the length of the second indication information is the indication information required when scheduling all resource blocks in the BWP length.
  • the second indication information keeps the length of the second indication information constant by filling high bits. In order to avoid too few scheduling resources, it is necessary to fill more bits into the second indication information, thereby causing waste of resources.
  • the indication granularity is dynamically changed, that is, the size of the first resource block group is dynamically determined, and the indication and scheduling with a smaller granularity can be realized.
  • the overhead of transmitting DMRS is saved, and at the same time, the number of filling bits in the indication information is reduced, further reducing waste of resources.
  • the size of the first resource block group is related to a coefficient.
  • the "one coefficient" is predefined or configured by the network device through high-layer signaling.
  • the size of the first resource block group is determined according to the coefficient k.
  • the size of the first resource block group is the size of the RBG configured according to the coefficient k and high-level parameters definite.
  • the size of the first resource block group is greater than the size of the RBG configured by the high-level parameter, wherein, is the size of the first resource block group, is the size of RBG.
  • 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, where, is the size of the first resource block group.
  • coefficient k is predefined or configured by the network device through high-layer signaling.
  • the coefficient k when the coefficient k is greater than 1, the number of RBs included in the first resource block group increases, so that the second indication information of the same length can indicate more RBs, reducing the number of second indication information s expenses.
  • 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 .
  • the size of the first resource block group is dynamically changed according to the BWP and the size of the second indication information, so that the second indication information can indicate more RBs without changing the length of the second indication information, reducing The overhead of the second indication information.
  • the size of the first resource block group is determined according to the number of RBGs included in the first frequency domain resource and a coefficient.
  • the "one coefficient" here may specifically refer to the third possible implementation manner above.
  • the "one coefficient" is the coefficient k in possible implementation manner 3
  • 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
  • the size of the first resource block group is k times the size of the RBG indicated by the high layer parameter rbg-size.
  • the size of the first resource block group is the size of the RBG indicated by the high-level parameter rbg-size times.
  • the indication granularity is dynamically changed, that is, the size of the resource block group is dynamically determined, and smaller granularity indication and scheduling can be realized , which saves the overhead of transmitting DMRS, and at the same time reduces the number of filling bits in the indication information, further reducing the waste of resources.
  • the RBG size indicated by the high-level parameter rbg-size is the number of RBGs included in the first frequency domain resource, is the number of RBGs included in the BWP.
  • Table 2 shows another example where the size of the first resource block group dynamically changes with the number of RBGs included in the first frequency domain resource.
  • the size of the first resource block group is k times the size of the RBG indicated by the high-level parameter rbg-size; when the number of RBGs included in the first frequency domain resource is less than or equal to the number of RBGs included in the BWP and greater than the number of RBGs included in the BWP When , the size of the first resource block group is the size of RBG times; when the number of RBGs included in the first frequency domain resource is less than or equal to the number of RBGs included in the BWP When , the size of the first resource block group is the size of RBG times.
  • the indication granularity is dynamically changed, that is, the size of the resource block group is dynamically determined, and smaller granularity indication and scheduling can be realized , which saves the overhead of transmitting DMRS, and at the same time reduces the number of filling bits in the indication information, further reducing the waste of resources.
  • the size of the first resource block group is (2) When the number of RBGs included in the first frequency domain resource is less than the number of RBGs included in the BWP Or the ratio of the number of RBGs included in the first frequency domain resource to the number of RBGs included in the BWP is less than or equal to When , the size of the first resource block group is
  • the indication granularity is dynamically changed, that is, the size of the resource block group is dynamically determined, and smaller granularity indication and scheduling can be realized , which saves the overhead of transmitting DMRS, and at the same time reduces the number of filling bits in the indication information, further reducing the waste of resources.
  • is the size of the first resource block group is the size of the BWP
  • is the number of RBGs included in the first frequency domain resource is the number of RBGs included in the BWP
  • M is the length of the predefined second indication information.
  • the indication granularity is dynamically changed, that is, the size of the resource block group is dynamically determined, and smaller granularity indication and scheduling can be realized , which saves the overhead of transmitting DMRS, and at the same time reduces the number of filling bits in the indication information, further reducing the waste of resources.
  • the network device sends third indication information to the terminal device, and correspondingly, the terminal device receives third indication information from the network device, where the third indication information is used to indicate the first quantity or the second quantity.
  • the terminal device can A second quantity is determined. For example, when the first number is 1, the second number is 2, and vice versa.
  • the method 600 further includes: the first sub-frequency domain resource corresponds to at least one first DMRS port, the second sub-frequency domain resource corresponds to at least one second DMRS port, and the number of the at least one first DMRS port is the same as the number of the first DMRS port.
  • the number of at least one second DMRS port is equal; when the index of any DMRS port included in the at least one first DMRS port is greater than the third threshold or the index of any DMRS port included in the one or more second DMRS ports is greater than the first
  • the threshold is three
  • the DMRS ports included in the at least one first DMRS port are different from the DMRS ports included in the at least one second DMRS port; when the indexes of all the DMRS ports included in the at least one first DMRS port and the at least one second
  • the DMRS ports included in the at least one first DMRS port are the same as the DMRS ports included in the at least one second DMRS port; wherein, the at least one first DMRS port includes the same DMRS port;
  • a DMRS port and the at least one second DMRS port are indicated by the third indication information, or the at least one first DMRS port
  • the third indication information here is used to indicate the number of pre-DMRS symbols, the number of DMRS CDM groups not used to carry data, and at least one first DMRS port and at least one second DMRS port.
  • the number of pre-DMRS symbols indicated by the third indication information, the number of DMRS CDM groups not used to carry data, and at least one first DMRS port may be the first antenna indicated by the antenna port field in 3GPP standard TS 38.212 port configuration.
  • the at least one first DMRS port or the at least one second DMRS port here may be understood as a DMRS port used for DMRS transmission on frequency domain resources corresponding to the first or second number indicated by the third indication information.
  • the third indication information is used to indicate the first quantity, then the first sub-frequency domain resource uses at least one first DMRS port for DMRS transmission, then at this time the second sub-frequency domain resource uses at least one second DMRS port for DMRS transmission .
  • the third indication information is used to indicate the second quantity, then the second sub-frequency domain resource uses at least one first DMRS port for DMRS transmission, then at this time the first sub-frequency domain resource uses at least one second DMRS port for DMRS transmission DMRS transmission.
  • 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 an index value
  • the second column is the number of DMRS CDM groups not used to carry data
  • the third column is the port index value of the first DMRS port
  • the fourth column is the number of pre-DMRS symbols
  • the fifth column is the port index value of the second DMRS port. It can be seen from Table 3 that each index value corresponds to a first antenna port configuration and a second DMRS port.
  • the third indication information may include an index value in Table 3, that is, any value in the first column of Table 3, and the terminal device determines the configuration of the first antenna port and at least one second DMRS port according to the index value.
  • the number of pre-DMRS symbols in the frequency domain resource configuration corresponding to the first DMRS port and the second DMRS port is different.
  • Table 3 takes the number of pre-DMRS symbols corresponding to the first DMRS port as 2 as an example, then The number of pre-DMRS symbols corresponding to the second DMRS port is 1.
  • the port index value of the corresponding first DMRS port When the number of DMRS CDM groups not used to carry data is 2 and the number of pre-DMRS symbols is 2, there are 8 candidate values for the port index value of the corresponding first DMRS port, such as 0 to 7 in the third column in Table 3 ; When the number of DMRS CDM groups that are not used to carry data is 2 and the number of pre-DMRS symbols is 1, the port index value of the corresponding second DMRS port has 4 candidate values, such as 0 to 0 in the fifth column in Table 3 3.
  • 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.
  • the at least one The DMRS ports included in the first DMRS port are different from the DMRS ports included in the at least one second DMRS port.
  • the difference between any DMRS port included in the at least one first DMRS port and the DMRS port included in the at least one second DMRS port mentioned here can be understood as the difference between any port index value of the first DMRS port in Table 3 and the second DMRS port. Any of the port index values are different.
  • the third threshold here may be that when the number of pre-DMRS symbols is 1, the third indication information indicates the maximum port index value of the DMRS port corresponding to the number of DMRS CDM groups not used to carry data. For example, when the number of pre-DMRS symbols is 1, as shown in Table 3, the number of DMRS CDM groups not used to carry data indicated by the third indication information is 2, and the maximum index of the corresponding DMRS port is 3, and the index value In the 4 rows from 16 to 19, the port index value corresponding to the first DMRS port is greater than 3, and any port index value of the first DMRS port in these 4 rows is different from any port index value of the second DMRS port.
  • the at least one first DMRS port includes The DMRS port of the at least one second DMRS port is the same as the DMRS port included in the at least one second DMRS port.
  • Any DMRS port included in the at least one first DMRS port mentioned here is the same as the DMRS port included in the at least one second DMRS port, which can be understood as any port index value of the first DMRS port in Table 3 and the second DMRS port Any port index value of the same.
  • the third threshold here may be the maximum port index value of the DMRS port corresponding to the number of DMRS CDM groups that are not used to carry data when the number of pre-DMRS symbols is 1. For example, when the number of pre-DMRS symbols is 1, as shown in Table 3, the number of DMRS CDM groups not used to carry data indicated by the third indication information is 2, and the maximum index of the corresponding DMRS port is 3, and the index value 4 rows from 12 to 15, the port index value corresponding to the first DMRS port is less than or equal to 3, and any port index value of the first DMRS port in these 4 rows is the same as any port index value of the second DMRS port.
  • the third indication information here is used to indicate the number of pre-DMRS symbols, DMRS CDM groups not used to bear data, and at least one first DMRS port.
  • the number of pre-DMRS symbols indicated by the third indication information, the number of DMRS CDM groups not used to carry data, and at least one first DMRS port may be the first antenna indicated by the antenna port field in 3GPP standard TS 38.212 port configuration.
  • the network device may also send fourth indication information to the terminal device, where the fourth indication information is used to indicate at least one second DMRS port.
  • the first DMRS port here may be understood as a DMRS port used when the frequency domain resources corresponding to the first number or the second number indicated by the third indication information perform DMRS transmission.
  • the third indication information is used to indicate the first quantity
  • the first sub-frequency domain resource uses at least one first DMRS port for DMRS transmission
  • the second sub-frequency domain resource uses at least one second DMRS port for DMRS transmission.
  • the third indication information is used to indicate the second quantity
  • the second sub-frequency domain resource uses at least one first DMRS port for DMRS transmission
  • the first sub-frequency domain resource uses at least one second DMRS port for DMRS transmission.
  • Table 4 shows an example of a possible mapping relationship between the first antenna port configuration and the first DMRS port.
  • the first column in Table 4 is an index value
  • the second column is the number of DMRS CDM groups not used to carry data
  • the third column is the port index value of the first DMRS port
  • the fourth column is the number of pre-DMRS symbols. It can be seen from Table 4 that each index value corresponds to a first antenna port configuration.
  • the third indication information may include an index value in Table 4, that is, any value in the first column of Table 3, and the terminal device determines the first antenna port configuration according to the index value.
  • the fourth indication information is used to indicate a port index value of a second DMRS port corresponding to the first antenna port configuration.
  • the first frequency domain resources include two parts of frequency domain resources with different numbers of configured pre-DMRS symbols. If the first antenna port indicated by the antenna port field in the existing 3GPP standard TS 38.212 is used configuration, the two parts of frequency domain resources can only use one DMRS port, then the port index values of the DMRS ports corresponding to the two parts of frequency domain resources must be consistent.
  • the ranges of the index values of the DMRS ports that can be selected for the frequency domain resources with the number of pre-DMRS symbols of 1 and 2 are not the same, so that the two parts of the frequency domain resources Selecting the same DMRS port will inevitably make some DMRS ports corresponding to the frequency domain resources configured with the number of pre-DMRS symbols 2 unusable, resulting in waste of resources.
  • the first indication information, the second indication information and the third indication information in the solution of the present application may be sent by the network device to the terminal device through one DCI, or may be sent to the terminal device through different DCIs.
  • the numbering of each instruction information in FIG. 6 is only for the convenience of description, and does not limit the order of the steps.
  • the above instruction information may be sent by the network device to the terminal device, or may be sent by the network device to the terminal device. The terminal devices send successively.
  • DMRS ports are respectively configured for two parts of frequency domain resources with different numbers of pre-DMRS symbols configured in the frequency domain resources carrying network equipment and terminal equipment transmission signals, which avoids waste of DMRS port resources and improves resources. Scheduling flexibility.
  • the network device sends the first indication information to the terminal device, and the terminal device receives the first indication information from the network device accordingly, where the first indication information is used to indicate the first frequency domain resource.
  • the first frequency domain resource here may be understood as a resource configured by the scheduled UE, or may be understood as a frequency domain resource used to carry a downlink signal sent by the network device to the terminal device.
  • the first frequency domain resource belongs to a part of the BWP.
  • the network device indicates the first frequency domain resource to the terminal device through the "frequency domain resource allocation" field in the DCI.
  • 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 first sub-indication information adopts a resource indication manner of continuous resource allocation, and indicates the first frequency domain resource through the RIV. Any RIV corresponds to a group of parameters used to determine continuously allocated frequency domain resources, including the sequence number RB start of the starting resource block of the first frequency domain resource and the number L RBs of continuously allocated resource blocks.
  • the second sub-indication information is mainly used to indicate the configuration of the resource block group in the second frequency domain resource, which will be divided into three possible situations for detailed introduction below.
  • the first indication information is the "frequency domain resource allocation" field in the DCI
  • the existing "frequency domain resource allocation” field can be used to indicate the first frequency domain resource.
  • the "frequency domain resource allocation” field is reused to indicate the configuration of resource block groups in the second frequency domain resource.
  • the first frequency domain resource, the second frequency domain resource, the first sub-frequency domain resource and the second sub-frequency domain resource are introduced in detail in conjunction with FIG. difference and connection.
  • the first frequency domain resource includes a first sub-frequency domain resource and a second sub-frequency domain resource, where the second frequency domain resource is a predetermined frequency domain resource among the first frequency domain resources.
  • Fig. 8 shows a schematic diagram of an example of the first frequency domain resource.
  • the first frequency domain resources (all the boxes in Figure 8) include the first sub-frequency domain resources (blank boxes in Figure 8) and the second sub-frequency domain resources (the slanted squares in Figure 8 Box), S801 is the second frequency domain resource, the first frequency domain resource includes the second frequency domain resource.
  • the second frequency domain resource may include one or more resource block groups belonging to the first sub-frequency domain resource (S802), and also include one or more resource block groups belonging to the second sub-frequency domain resource. A plurality of resource block groups (S803). Or, as shown in (b) in FIG.
  • one or more resource block groups ( S803 ) included in the second frequency domain resource all belong to the second sub-frequency domain resource.
  • one or more resource block groups (S802) included in the second frequency domain resource all belong to the first sub-frequency domain resource.
  • the second frequency domain resource is a predetermined frequency domain resource among the first frequency domain resources
  • the first frequency domain resource includes N first resource block groups
  • the second frequency domain resource The resource includes i first resource block groups, i and N are positive integers, and N ⁇ i, once the terminal device determines the size of i, it can determine the second frequency domain resource in the first frequency domain resource.
  • the i first resource block groups included in the second frequency domain resource may be the first resource block groups with indexes 0, 1, ..., i-1 in the first frequency domain resource, as shown in (a ), S801 is the first resource block group whose indices are 0 to 5 in the first frequency domain resource.
  • the i first resource block groups included in the second frequency domain resource may be the first resource block groups indexed as N-i,...N-1 in the first frequency domain resource, as shown in (d) in FIG. 8 , S801 is the first resource block group with indexes 15 to 20 in the first frequency domain resource.
  • the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, the one or more resource block groups belong to the first frequency sub-domain resource, and the second frequency domain resource Other resource block groups in domain resources except the one or more resource block groups belong to the second sub-frequency domain resource.
  • the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, the one or more resource block groups belong to the second sub-frequency domain resource, and the second Other resource block groups in the frequency domain resources except the one or more resource block groups belong to the first sub-frequency domain resource.
  • the second sub-indication information is used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRS CDM groups not used to carry data, where the second The number of pre-DMRS symbols in the second frequency domain resource or the number of DMRS CDM groups not used to carry data is the first number of resource block groups belonging to the first sub-frequency domain resource, and the number of pre-DMRS symbols in the second frequency domain resource Or the number of DMRS CDM groups not used to carry data is the second number of resource block groups belonging to the second sub-frequency domain resource.
  • the third frequency domain resources and/or the first frequency domain resources need to meet any of the following conditions.
  • the third frequency domain resource includes the first frequency domain resource.
  • the number of resource blocks included in the third frequency domain resource is not M, and the M belongs to a preset first number set. In other words, the network device or the terminal device does not expect the number of resource blocks included in the third frequency domain resource to belong to the first number set.
  • the first quantity set may include ⁇ 1,2,3,4,5,6,7,9,10,14,15,22,31,44,63,88,89,90,126,127,175,176,177,178,179,180,252,253,254,255 ⁇ one or more values.
  • it may also be other sets, which are not limited in this application.
  • the number of resource blocks included in the third frequency domain resource is N, and the N belongs to the preset second number set; or in other words, the network device or terminal device expects the number of resource blocks included in the third frequency domain resource
  • the quantities belong to the second set of quantities.
  • the first quantity set may include one or more values in ⁇ 32, 33, 45, 46, 64, 65, 91, 92, 128, 129, 130, 131, 140, 141, 181, 182, 256, 257 ⁇ .
  • it may also be other sets, which are not limited in this application.
  • Condition three the relationship between the number of resource blocks included in the third frequency domain resource and the number of resource blocks included in the first resource block group satisfies a first preset condition.
  • the third condition will be described in detail below.
  • the size of the BWP and the size of the first resource block group satisfy in is the size of the BWP, is the size of the first resource block group.
  • the second sub-indication information may indicate a maximum of n first resource block groups in the first frequency domain resource (corresponding to the above possible situation 1 or possible situation 2)
  • the number of pre-DMRS symbols of at most n first resource block groups in the first frequency domain resource may be indicated (corresponding to the above possible case three).
  • the number of resource block groups included in the second frequency domain resource is less than or equal to the second threshold.
  • the second threshold here is n.
  • the definition of n here can be understood as the maximum number of the first resource block groups in the first frequency domain resources that can be indicated by the second sub-indication information, and n is a positive integer.
  • the value of n may also be determined in various ways. In the following, three ways of determining the value of n are taken as examples to introduce possible methods of determining the value of n.
  • the terminal device determines n according to the high-layer signaling sent by the network device.
  • the terminal device is determined according to n corresponding to each BWP predefined in the standard. or,
  • the terminal device determines n according to the size of the BWP and the size of the first resource block group.
  • n 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:
  • n when configuring different BWPs and different sizes of the first resource block group, the value of n may be different.
  • the maximum number of first resource block groups included in the second frequency domain resource is denoted as n
  • the number of first resource block groups included in the second frequency domain resource is denoted as i.
  • the second sub-indication information indicates 0 first resource blocks in a specific implementation
  • the size of the first frequency domain resource indicated by the first sub-indication information also needs to satisfy the second preset condition.
  • the second preset condition is in, is the size of the first resource block group, is the size of the BWP.
  • the number i of the first resource block groups included in the second frequency domain resource may be determined by the following formula:
  • 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.
  • the terminal device determines the first sub-indication information according to the first indication information, the first sub-indication information is used to indicate the frequency domain pattern of the first frequency domain resource corresponding to the RIV, and according to the first sub-indication information
  • the indication information determines the first frequency domain resource.
  • the first indication information adopts a resource indication manner of continuous resource allocation, and indicates the first frequency domain resource through the RIV.
  • the first sub-indication information that is, the frequency domain pattern corresponding to the RIV indicated by the first indication information, the frequency domain pattern includes a candidate value of the sequence number RB start of the starting resource block of the first frequency domain resource and the number of consecutive allocated resource blocks A candidate value for L RBs .
  • each RIV corresponds to a frequency domain pattern, wherein each frequency domain pattern includes a candidate value of the sequence number RB start of the starting resource block of the first frequency domain resource and a value of the number L RBs of consecutively allocated resource blocks Candidate value.
  • Candidate values for the number of consecutively allocated resource blocks L RBs included in the frequency domain pattern are greater than
  • the frequency domain pattern may correspond to at least two RIVs, and any two RIVs in the at least two RIVs are not equal, wherein, is the size of the first resource block group, is the size of the BWP.
  • At least two RIVs corresponding to each frequency domain pattern include a first RIV that is smaller than a second preset threshold, and all RIVs in the at least two RIVs except the first RIV are larger than the second preset threshold .
  • the second preset threshold is in, is the size of the BWP.
  • the frequency domain pattern corresponds to at least 2 RIVs, which are calculated as follows:
  • the frequency domain pattern corresponds to two RIVs, namely RIV0 and RIV1.
  • the calculation method of RIV0 is as described in TS 38.214; the calculation method of RIV1 is as follows: if otherwise,
  • RIV2 is calculated as described in 38.214, and RIV2, RIV3 and RIV4 are calculated as follows: If otherwise,
  • one candidate value of each frequency domain pattern of the first frequency domain resource corresponds to 2 i RIVs.
  • the candidate values of the frequency domain pattern and The number i of the first resource block groups included in the second frequency domain resource in the first frequency domain resource corresponding to the candidate value is 1, corresponding to RIV 0 and RIV1, and the candidate value of the frequency domain pattern and Corresponding to RIV 2 , RIV 3 , RIV 4 , and RIV 5 , the number i of first resource block groups included in the second frequency domain resource in the first frequency domain resource corresponding to the candidate value is 2.
  • the terminal device determines the second sub-indication information according to the first indication information.
  • the second sub-indication information is used to indicate the pre-DMRS configuration pattern corresponding to the RIV.
  • each sub-indication information of the second frequency domain resource is determined. Configuration of the number of pre-DMRS symbols of a resource block group.
  • the terminal device needs to acquire pattern information, and the pattern information is used to indicate the mapping relationship between multiple patterns and multiple index values. It should be understood that the multiple patterns here are multiple DMRS configuration patterns, and the pattern information may be pre-configured on the terminal device side, or may be sent to the terminal device by the network device.
  • the terminal device determines the second sub-indication information according to the RIV and pattern information indicated by the first indication information, and the second sub-indication information is a pre-DMRS configuration pattern in the pattern information; determines the second frequency domain according to the pattern. Configuration of the number of pre-DMRS symbols of each first resource block group of resources.
  • the terminal device determines the configuration of the number of pre-DMRS symbols of each first resource block group of the second frequency domain resource according to the second sub-indication information.
  • 2 i RIVs are used to indicate all possible configurations of the number of pre-DMRS symbols of the i first resource block groups in the second frequency domain resource happening.
  • any one RIV corresponds to the configuration of the number of pre-DMRS symbols of the i first resource block group
  • any two RIVs correspond to the configuration of the number of pre-DMRS symbols of the i first resource block group
  • the configuration is different. That is to say, the mapping relationship between multiple patterns and multiple index values may be the mapping relationship between multiple patterns and multiple RIVs.
  • One RIV among the multiple RIVs may uniquely correspond to one of the multiple patterns.
  • any one of the multiple patterns may include a configuration of the number of pre-DMRS symbols of each first resource block group in the i first resource block groups. Any two patterns in the plurality of patterns are different.
  • the multiple RIVs correspond to a frequency domain pattern, that is, the 2 i RIVs correspond to a frequency domain pattern
  • the frequency domain pattern includes the initial frequency domain resource A candidate value of the sequence number RB start of the resource block and a candidate value of the number L RBs of continuously allocated resource blocks.
  • the number L RBs of consecutive allocated resource blocks included in the frequency domain pattern is greater than
  • the terminal device determines the configuration of the number of pre-DMRS symbols of the two first resource block groups according to the pre-DMRS symbol pattern indicated by the second sub-indication information. Specifically, assuming that the first number indicated by the third indication information in S604 is 1, when the terminal device receives RIV 0, it is determined that the configuration of the number of pre-DMRS symbols of the two first resource block groups is [2,2] , then the terminal device can determine that the two first resource block groups are the second sub-frequency domain resources; when the terminal device receives RIV 1, determine the configuration of the number of pre-DMRS symbols of the two first resource block groups as [ 1, 2], the terminal device can determine that the first resource block group 0 is the first sub-frequency domain resource, and the first resource block group 1 is the second sub-frequency domain resource; when the terminal device receives RIV 2, determine two The configuration of the number of pre-DMRS symbols of the first resource block group is [2,1], then the terminal device can determine that the first resource block group 0 is the second sub-frequency domain resource, and the first resource
  • the terminal device when the terminal device receives RIV 3, it is determined that the configuration of the number of pre-DMRS symbols of the two first resource block groups is [1,1], then the terminal device can determine that the two first resource block groups are equal to is the first sub-frequency domain resource.
  • the configuration pattern of the number of pre-DMRS symbols in one first resource block group is shown in Table 7 below. Table 7 may be an exemplary pattern information.
  • the terminal device determines the pre-DMRS symbol configuration of one first resource block group according to the RIV in the second sub-indication information. Specifically, assuming that the second number indicated by the third indication information in S604 is 1, when the terminal device receives RIV4, it is determined that the configuration of the number of pre-DMRS symbols of one first resource block group is 2, then the terminal device can Determine that the first resource block group is the first sub-frequency domain resource; when the terminal device receives RIV5, determine that the configuration of the number of pre-DMRS symbols of the first resource block group is 1, then the terminal device can determine The one first resource block group is the second sub-frequency domain resource.
  • the terminal device needs to acquire pattern information, and the pattern information may include a mapping relationship between multiple patterns and multiple index values, and a mapping relationship between multiple index values and frequency domain patterns. That is, the pattern information may include a mapping relationship between multiple patterns and multiple RIVs, and a mapping relationship between the multiple RIVs and frequency domain patterns. It should be understood that the pattern information may be pre-configured on the terminal device side, or may be sent to the terminal device by the network device.
  • the mapping relationship between the multiple patterns and the multiple RIVs is as described above, and the mapping relationship between the multiple RIVs and the frequency domain patterns is the mapping relationship described in (1), which will not be repeated here.
  • the frequency domain pattern of the first frequency domain resource and the configuration pattern of the number of preamble DMRS symbols are shown in Table 8 and Table 9 below. Among them, Table 8 corresponds to Table 6 above, and Table 9 corresponds to Table 7 above.
  • the terminal device receives the RIV in the first indication information, and can determine the value of the pre-DMRS symbol of each first resource block group in the first frequency domain resource and the second frequency domain resource according to Table 8.
  • Table 8 may be an exemplary pattern information.
  • the terminal device receives the RIV in the first indication information, and can determine the pre-DMRS symbols of each first resource block group in the first frequency domain resource and the second frequency domain resource according to Table 9.
  • Table 9 may be an exemplary pattern information.
  • the terminal device determines each first Configuration of the number of pre-DMRS symbols of the resource block group.
  • the third indication information in S604 indicates the first quantity or the second quantity.
  • the configuration pattern of the number of pre-DMRS symbols here only indicates that the configuration of the number of pre-DMRS symbols of each first resource block group in the second frequency domain resource is the same as the first number or the second number indicated by the third indication information, or different.
  • the number of pre-DMRS symbols here is configured with 0 to indicate that the number of pre-DMRS symbols of a certain first resource block group is the same as the first number, that is, The number of pre-DMRS symbols of the first resource block group is 2, and 1 indicates that the number of pre-DMRS symbols of a certain first resource block group is different from the first number, that is, the pre-DMRS symbols of the first resource block group The number of symbols is 1.
  • 2 i RIVs are used to indicate all possible configurations of the number of pre-DMRS symbols of the i first resource block groups in the second frequency domain resource happening.
  • any one RIV corresponds to the configuration of the number of pre-DMRS symbols of the i first resource block group
  • any two RIVs correspond to the configuration of the number of pre-DMRS symbols of the i first resource block group The configuration is different.
  • the terminal device determines the configuration of the number of pre-DMRS symbols of the two first resource block groups according to the RIV in the second sub-indication information. Specifically, assuming that the first number indicated by the third indication information in S604 is 1, when the terminal device receives RIV 0, it is determined that the configuration of the number of pre-DMRS symbols of the two first resource block groups is the same as the first number, Then the terminal device can determine that the two first resource block groups are the first sub-frequency domain resources; when the terminal device receives RIV 1, determine the configuration and the first number of pre-DMRS symbols of the first resource block group 0 If the configuration of the number of pre-DMRS symbols of the first resource block group 1 is the same as the first number, the terminal device can determine that the first resource block group 0 is the second sub-frequency domain resource, and the first resource block group 1 is the second sub-frequency domain resource.
  • a sub-frequency domain resource when the terminal device receives RIV 2, it is determined that the configuration of the number of pre-DMRS symbols of the first resource block group 0 is the same as the first number, and the number of pre-DMRS symbols of the first resource block group 1 is different from the first number, the terminal device can determine that the first resource block group 0 is the first sub-frequency domain resource, and the first resource block group 1 is the second sub-frequency domain resource.
  • the terminal device may determine that both the two first resource block groups are the second sub-frequency domain resources.
  • 0 is used to indicate that the number of pre-DMRS symbols of a certain first resource block group is the same as the number indicated by the third indication information (the first number or the second number), and 1 is used to indicate that it is different.
  • the terminal device determines the pre-DMRS symbol configuration of one first resource block group according to the RIV in the second sub-indication information. Specifically, assuming that the second number indicated by the third indication information in S604 is 1, when the terminal device receives RIV4, it is determined that the configuration of the number of pre-DMRS symbols of a first resource block group is the same as the first number, then The terminal device may determine that the first resource block group is the first sub-frequency domain resource; when the terminal device receives RIV5, it determines that the configuration of the number of pre-DMRS symbols of the first resource block group is different from the first number , the terminal device may determine the one first resource block group as the second sub-frequency domain resource.
  • the RIV sent in the first sub-indication information and the second sub-indication information may be the same value, or in other words, one RIV is sent in the first sub-indication information, and the terminal device determines the first frequency domain based on the one RIV. Configuration of the number of pre-DMRS symbols of each first resource block group in the resource and the second frequency domain resource.
  • the frequency domain pattern of the first frequency domain resource and the configuration pattern of the number of preamble DMRS symbols are shown in Table 12 and Table 13 below. Among them, Table 12 corresponds to Table 10 above, and Table 13 corresponds to Table 11 above.
  • the terminal device receives the RIV in the first indication information, and can determine the value of the pre-DMRS symbol of each first resource block group in the first frequency domain resource and the second frequency domain resource according to Table 12. Quantity configuration.
  • the terminal device receives the RIV in the first indication information, and can determine the value of the pre-DMRS symbol of each first resource block group in the first frequency domain resource and the second frequency domain resource according to Table 13. Quantity configuration.
  • n as a fixed value of 1.
  • the above-mentioned second preset condition is that the first frequency-domain resource includes
  • the second preset condition is that the first frequency domain resources include in, is the size of the first resource block group, is the size of the BWP.
  • the second frequency domain resource is a predetermined first resource block group.
  • the terminal device determines the first frequency domain resource according to the first sub-indication information in the first indication information.
  • the first sub-indication information adopts a resource indication manner of continuous resource allocation, and indicates the first frequency domain resource through the RIV.
  • the frequency domain pattern of the first frequency domain resource corresponds to two RIVs, denoted as the first RIV and the second RIV. Wherein, the first RIV is not equal to the second RIV.
  • the first RIV is smaller than the second preset threshold, and the second RIV is greater than or equal to the second preset threshold.
  • the first RIV and the second RIV respectively correspond to different numbers of pre-DMRS symbols.
  • the second preset threshold is in, is the size of the BWP.
  • the first RIV is determined according to the RIV calculation method in the type 1 resource allocation type in 3GPP TS 38.214.
  • the second RIV can be determined as follows: when , the second RIV is equal to when , the second RIV is equal to Wherein, RB start is the serial number of the starting resource block of the first frequency domain resource, and L RBs is the number of continuously allocated resource blocks, is the size of the BWP, is the size of the first resource block group.
  • the terminal device determines the configuration of the number of pre-DMRS symbols of each first resource block group of the second frequency domain resource according to the second sub-indication information in the first indication information.
  • the second sub-indication information includes a RIV.
  • the terminal device determines that the number of pre-DMRS symbols of the second frequency domain resource is the same as the number of pre-DMRS symbols indicated by the third indication information; when the one RIV When the RIV is the second RIV, the terminal device determines that the number of pre-DMRS symbols of the second frequency domain resource is different from the number of pre-DMRS symbols indicated by the third indication information.
  • the terminal device determines that the number of pre-DMRS symbols of the second frequency domain resource is the first value; when the one RIV When the RIV is the second RIV, the terminal device determines that the number of pre-DMRS symbols of the second frequency domain resource is a second value, where the second value is not equal to the first value, and the first value and the second value are respectively ⁇ 1, 2 ⁇ in one.
  • the BWP of the terminal device includes 16 RBs, numbered RB 0 to 15, and the network device allocates RB 0 to 14 for the terminal device to receive downlink signals, that is, the first frequency domain resource includes RB 0 to 14 , the size of the first resource block group is 4,
  • the number of continuously allocated RBs included in the first frequency domain resource is 15 or more That is, the size of the first frequency domain resource satisfies the second preset condition, and the continuous resource allocation pattern corresponding to the first frequency domain resource corresponds to two RIVs.
  • the 2 are 63 and 167.
  • Second preset threshold When the terminal device receives the RIV indicated by the second sub-indication information as 167, since the RIV is greater than 136, the terminal device determines that the number of pre-DMRS symbols of a first resource block group in the first frequency domain resource is 2, when the terminal device When receiving the RIV indicated by the second sub-indication information as 63, since the RIV is less than 136, the terminal device determines that the number of pre-DMRS symbols of one first resource block group in the first frequency domain resource is 1.
  • S602 is similar to S602 in the first possible implementation manner, and details are not repeated here.
  • the embodiment of the present application by configuring the number of different pre-DMRS symbols on the scheduled frequency domain resources according to the communication needs, flexible resource configuration in the frequency domain is realized, the overhead for transmitting DMRS is reduced, and by multiplexing the existing The field indicates a predetermined frequency domain resource among the scheduled frequency domain resources, which further reduces the overhead indicated by the DCI. Further, when the size of the predetermined frequency domain resource is fixed, the embodiment of the present application can reduce the processing complexity of the terminal device.
  • the network device sends second indication information to the terminal device, and correspondingly, the terminal device receives the second indication information from the network device, where the second indication information is used to indicate A frequency domain resource belonging to the first sub-frequency domain resource among other frequency domain resources other than the second frequency domain resource, wherein the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.
  • the second indication information is used to indicate one or more resource block groups in the first frequency domain resource other than the second frequency domain resource, and the one or more resource block groups belong to the first sub-frequency domain resource .
  • the blocks in the first frequency domain resource are the above “other frequency domain resources”
  • S804 is the above "other frequency domain resources” Among the frequency domain resources belonging to the first sub-frequency domain resources.
  • the manner in which the second indication information indicates the frequency domain resources belonging to the first sub-frequency domain resources in the above "other frequency domain resources" is the same as in S603 in the first possible implementation manner, the second indication information indicates the first The manner of the sub-frequency domain resources is similar, and will not be repeated here.
  • the second indication information only needs to indicate resources other than the predetermined frequency domain resources, which reduces signaling overhead and saves resources .
  • the terminal device may determine the first sub-frequency domain resource according to the first sub-frequency domain resource indicated by the second indication information. For a specific determination manner, refer to manner 1 and manner 2 in the first possible implementation manner, and details are not repeated here. For details about the four possible ways of determining the size of the first resource block group, refer to possible way 1 to possible way 4 in the first possible implementation manner, and details are not repeated here.
  • S604 is similar to S604 in the first possible implementation manner, and details are not repeated here.
  • the method 600 further includes: the first sub-frequency domain resource corresponds to at least one first DMRS port, the second sub-frequency domain resource corresponds to at least one second DMRS port, and the number of the at least one first DMRS port is the same as the number of the first DMRS port.
  • the number of at least one second DMRS port is equal; when the index of any DMRS port included in the at least one first DMRS port is greater than the third threshold or the index of any DMRS port included in the one or more second DMRS ports is greater than the first
  • the threshold is three
  • the DMRS ports included in the at least one first DMRS port are different from the DMRS ports included in the at least one second DMRS port; when the indexes of all the DMRS ports included in the at least one first DMRS port and the at least one second
  • the DMRS ports included in the at least one first DMRS port are the same as the DMRS ports included in the at least one second DMRS port; wherein, the at least one first DMRS port includes the same DMRS port;
  • a DMRS port and the at least one second DMRS port are indicated by the third indication information, or the at least one first DMRS port
  • the first indication information, the second indication information and the third indication information in the solution of the present application may be sent by the network device to the terminal device through one DCI, or may be sent to the terminal device through different DCIs.
  • the numbering of each instruction information in FIG. 6 is only for the convenience of description, and does not limit the order of the steps.
  • the above instruction information may be sent by the network device to the terminal device, or may be sent by the network device to the terminal device. The terminal devices send successively.
  • the main steps are similar to those in the first possible implementation. Taking (2) in S602 in the first possible implementation as an example for illustration, it is necessary to convert the The number of front DMRS ports is replaced by the number of DMRS CDM groups not used to carry data.
  • the main steps are similar to those in the second possible implementation. Taking (2) in S602 in the second possible implementation as an example for illustration, it is necessary to convert the The number of front DMRS ports is replaced by the number of DMRS CDM groups not used to carry data.
  • the value of the number of front DMRS ports can be 1 or 2.
  • the terminal device adopts DMRStype1 there are only two configurations of the number of DMRS CDM groups that are not used to carry data. Therefore, the third possible implementation Similar to the first possible implementation and the second possible implementation respectively, the fourth possible implementation can uniquely determine the number of DMRS CDM groups that are not used to bear data in the second frequency domain resource.
  • the terminal device adopts DMRStype2 there are three configurations of the number of DMRS CDM groups not used to carry data, so the terminal device cannot uniquely determine the number of DMRS CDM groups not used to carry data.
  • the method 600 further includes that the network device sends fifth indication information to the terminal device, and correspondingly, the terminal device receives fifth indication information from the network device, where the fifth indication information is used to indicate that the first sub-frequency domain resources are not used to bear data.
  • Number of DMRS CDM groups The terminal device determines the configuration of the number of DMRS CDM groups not used to carry data in all first resource block groups in the first frequency domain resource according to the fifth indication information.
  • the following takes the third indication information indicating the second quantity and the third indication information indicating the first quantity as examples for detailed introduction.
  • the fifth indication information may indicate the number of DMRS CDM groups corresponding to the first sub-frequency domain resources that are not used to carry data by indicating an index, or, the fifth The indication information may indicate the difference between the number of DMRS CDM groups not used to bear data corresponding to the first sub-frequency domain resource and the second number by means of an index.
  • the fifth indication information indicates the number of DMRS CDM groups corresponding to the first sub-frequency domain resources that are not used to carry data by indexing.
  • the terminal device determines the DMRS CDM group that is not used to carry data in the first sub-frequency domain resource The number is 2; when the second number indicated by the third indication information is 1, assuming that the fifth indication information indicates index 1, the terminal device determines that the number of DMRS CDM groups that are not used to carry data in the first sub-frequency domain resource is 3; when the second number indicated by the third indication information is 2, assuming that the fifth indication information indicates index 0, the terminal device determines that the number of DMRS CDM groups not used to carry data in the first sub-frequency domain resource is 1, when When the second number indicated by the third indication information is 2, assuming that the fifth indication information indicates index 1, the terminal device determines that the number of DMRS CDM groups not used to carry data in the first sub-frequency domain resource is 3; when the third indication When the second number indicated by the information is 3, assuming that the fifth indication information indicates an index of 0, the terminal device determines that
  • the fifth indication information may index the difference between the number of DMRS CDM groups not used to bear data corresponding to the first sub-frequency domain resource and the second number.
  • the terminal device determines that the number of DMRS CDM groups that are not used to carry data in the first sub-frequency domain resource is 2; when the second When the second quantity is 1, the fifth indication information indicates index 1, then the terminal device determines that the number of DMRS CDM groups not used to carry data in the first sub-frequency domain resource is 3; when the second quantity is 2, the fifth indication information If the index is 0, the terminal device determines that the number of DMRS CDM groups that are not used to carry data in the first sub-frequency domain resource is 1; when the second number is 2, the fifth indication information indicates index 1, then the terminal device determines that the first The number of DMRS CDM groups that are not used to carry data in sub-frequency domain resources is 3; when the second number is 3, the fifth indication information indicates index 0, and the terminal device determines that the first sub-frequency domain resources are not used to carry data.
  • the number of DMRS CDM groups is 2; when the second number is 3, the fifth indication information indicates index 1, then the terminal device determines that the first sub-frequency domain resources are not used
  • the fifth indication information may indicate the number of DMRS CDM groups that are not used to bear data corresponding to the second frequency sub-frequency domain resource by indicating an index, or, the fifth The indication information may indicate the difference between the number of DMRS CDM groups that are not used to carry data and the first number corresponding to the second frequency sub-frequency domain resources by indexing.
  • the specific implementation manner is similar to that when the third indication information indicates the second quantity, and will not be repeated here.
  • the embodiment of the present application configures the number of different DMRS CDM groups that are not used to carry data according to the communication needs on the scheduled frequency domain resources, so as to realize flexible resource configuration in the frequency domain and reduce the usage time.
  • the overhead for transmitting DMRS is not used to carry data according to the communication needs on the scheduled frequency domain resources, so as to realize flexible resource configuration in the frequency domain and reduce the usage time.
  • the configuration of the first resource block group corresponding to the number of DMRS CDM groups that are not used to carry data includes three cases, namely 1, 2, and 3, which can only be applied to "possible case three", that is, the second sub-indication
  • the information is used to indicate the number of DMRS CDM groups that are not used to carry data corresponding to each resource block group in the second frequency domain resource, where the number of DMRS CDM groups that are not used to carry data in the second frequency domain resource is
  • the first number of resource block groups belongs to the first sub-frequency domain resources, and the number of pre-DMRS symbols in the second frequency domain resources or the number of DMRS CDM groups that are not used to carry data is the second number of resource block groups.
  • Sub-frequency domain resources assuming that different first resource block groups in the first frequency domain resources correspond to the configuration of the number of DMRS CDM groups not used to carry data, only including 2 cases, if 1, 2, or 2, 3, or 1, 3, then "possible situation 1", “possible situation 2" and “possible situation 3" in S601 can be applied.
  • the number of DMRS CDM groups that are not used to carry data may be directly indicated, or the number of each first resource block group in the second frequency domain resource relative to the second resource block group indicated by the third indication information may be indicated. Quantity difference.
  • the number of RIVs corresponding to the second frequency domain resources including i first resource block groups is 3 i .
  • Method 600 further includes that the network device sends fifth indication information to the terminal device, and accordingly, the terminal device receives fifth indication information from the network device, where the fifth indication information is used to indicate that the first sub-frequency domain resource is not used for Number of DMRS CDM groups carrying data.
  • the terminal device determines the configuration of the number of DMRS CDM groups not used to carry data in all first resource block groups in the first frequency domain resource according to the fifth indication information.
  • DMRS are respectively configured for two parts of frequency domain resources that are not used to carry data and are not used to carry data. Ports realize flexible resource configuration in the frequency domain, avoiding the waste of DMRS port resources and improving the flexibility of resource scheduling.
  • the fifth possible implementation method when DMRStype2 is used, there are three configurations of the number of DMRS CDM groups not used to carry data, that is, the number of DMRS CDM groups not used to carry data is 1 or 2 or 3, and the first frequency domain resources include The first sub-frequency domain resource, the second sub-frequency domain resource and the third sub-frequency domain resource, and the number of DMRS CDM groups not used to bear data corresponding to the three sub-frequency domain resources is different, in the above third possible implementation On the basis of the method, there is the following difference: the terminal device determines that the third sub-frequency domain resource is not used to carry data DMRS Number of CDM groups.
  • DMRS are respectively configured for two parts of frequency domain resources that are not used to carry data and are not used to carry data. Ports realize flexible resource configuration in the frequency domain, avoiding the waste of DMRS port resources and improving the flexibility of resource scheduling.
  • the sixth possible implementation method when DMRStype2 is used, there are three configurations of the number of DMRS CDM groups not used to carry data, that is, the number of DMRS CDM groups not used to carry data is 1 or 2 or 3, and the first frequency domain resources include The first sub-frequency domain resource, the second sub-frequency domain resource and the third sub-frequency domain resource, and the number of DMRS CDM groups not used to bear data corresponding to the three sub-frequency domain resources is different, in the above third possible implementation On the basis of the method, there is the following difference: the terminal device determines that the third sub-frequency domain resource is not used to carry data DMRS Number of CDM groups.
  • DMRS are respectively configured for two parts of frequency domain resources that are not used to carry data and are not used to carry data. Ports realize flexible resource configuration in the frequency domain, avoiding the waste of DMRS port resources and improving the flexibility of resource scheduling.
  • the seventh possible implementation method is suitable for flexible scheduling of the number of pre-DMRS symbols corresponding to each first resource block group on the first frequency domain resource, or, when DMRS type1 is used, it is suitable for flexible scheduling of the first frequency domain resource
  • the number of DMRS CDM groups that are not used to carry data corresponding to each first resource block group, or when the number of DMRS CDM groups that are not used to carry data and use DMRS type2 only includes two configuration situations, it is suitable for flexible scheduling of the first frequency
  • the network device sends first indication information to the terminal device.
  • the terminal device receives the first indication information from the network device, where the first indication information is used to indicate a first frequency domain resource.
  • the first frequency domain resource here may be understood as a resource configured by the scheduled UE, or may be understood as a frequency domain resource used to carry a downlink signal sent by the network device to the terminal device.
  • the first frequency domain resource belongs to a part of the BWP.
  • the network device indicates the first frequency domain resource to the terminal device through the "frequency domain resource allocation" field in the DCI.
  • the network device sends the PDSCH on the first frequency domain resource, and correspondingly, the terminal device receives the PDSCH on the first frequency domain resource.
  • the network device sends the second indication information to the terminal device, and correspondingly, the terminal device receives the second indication information from the network device.
  • the network device sends third indication information to the terminal device, and accordingly, the terminal device receives the third indication information from the network device.
  • the content indicated by the second indication information and the third indication information will be described below with examples respectively.
  • 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
  • the second indication information is used to indicate the number of the first resource block group in the first frequency domain resource
  • the number of pre-DMRS symbols of one or more first resource block groups is different from the number of pre-DMRS symbols of the first resource block group with the smallest index, and the one or more first resource block groups belong to the first resource block group except the smallest index Other first resource block groups other than the first resource block group.
  • 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
  • the second indication information is used to indicate the number of the first resource block group in the first frequency domain resource
  • the number of pre-DMRS symbols of one or more first resource block groups is the same as the number of pre-DMRS symbols of the first resource block group with the smallest index, and the one or more first resource block groups belong to the first resource block group except the smallest index Other first resource block groups other than the first resource block group.
  • the third indication information is used to indicate the number of pre-DMRS symbols of the first resource block group with the largest index in the first frequency domain resource
  • the second indication information is used to indicate the number of the first resource block group in the first frequency domain resource
  • the number of pre-DMRS symbols of one or more first resource block groups is different from the number of pre-DMRS symbols of the first resource block group with the largest index, and the one or more first resource block groups belong to the first resource block group except the largest index Other first resource block groups other than the first resource block group.
  • the third indication information is used to indicate the number of pre-DMRS symbols of the first resource block group with the largest index in the first frequency domain resource
  • the second indication information is used to indicate the number of the first resource block group in the first frequency domain resource
  • the number of pre-DMRS symbols of one or more first resource block groups is the same as the number of pre-DMRS symbols of the first resource block group with the largest index, and the one or more first resource block groups belong to the first resource block group except the largest index Other first resource block groups other than the first resource block group.
  • Example 1 The scheme of Example 1 will be described in detail below in conjunction with FIG. 7 .
  • the first resource block groups there are four first resource block groups in total, namely the 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.
  • the third indication information is used to indicate that the number of pre-DMRS symbols of the first resource block group 0 is 1
  • the second indication information is used to indicate that the number of pre-DMRS symbols of the first resource block group 1 and 2 is the same as that of the first resource block group 0.
  • the terminal device determines that the number of pre-DMRS symbols in the first resource block group 1 and 2 is 2 according to the second indication information. Further, the terminal device determines that the number of pre-DMRS symbols in the first resource block group 3 is Set the number of DMRS symbols to 1. Subsequently, in S602, the terminal device receives the PDSCH on the first frequency domain resource according to the configuration of the pre-DMRS symbols on the first frequency domain resource.
  • the first indication information, the second indication information and the third indication information in the solution of the present application may be sent by the network device to the terminal device through one DCI, or may be sent to the terminal device through different DCIs.
  • the numbering of each instruction information in FIG. 6 is only for the convenience of description, and does not limit the order of the steps.
  • the above instruction information may be sent by the network device to the terminal device, or may be sent by the network device to the terminal device. The terminal devices send successively.
  • the DMRS ports or DMRS CDM groups not used to bear data are configured respectively for two parts of frequency domain resources with different numbers of DMRS CDM groups not used to bear data.
  • the number of groups realizes flexible resource configuration in the frequency domain, avoids the waste of DMRS port resources, and improves the flexibility of resource scheduling.
  • Fig. 9 is a schematic block diagram of a communication device for resource allocation provided by an embodiment of the present application.
  • the communication device 10 may include a transceiver module 11 and a processing module 12 .
  • the transceiver module 11 can be used for receiving information sent by other devices, and can also be used for sending information to other devices. For example, receiving the first indication information or sending the second indication information.
  • the processing module 12 may be used for performing device content processing, for example, acquiring pattern information.
  • the communication device 10 may correspond to the network device in the foregoing method embodiments.
  • the communication device 10 may correspond to the network device in the method 600 according to the embodiment of the present application, the communication device 10 may include a module for performing the operations performed by the network device in the corresponding method, and the communication device Each unit in 10 is to implement the operations performed by the network device in the corresponding method.
  • the transceiver module 11 is configured to perform steps S601, S602, S603, and S604.
  • the transceiver module 11 is configured to send first indication information, where the first indication information is used to indicate a first frequency domain resource;
  • the physical downlink shared channel PDSCH is sent on the frequency domain resource; wherein, the first number of the PDSCH is different from the second number of the PDSCH, the first frequency domain resource includes a first sub-frequency domain resource and a second sub-frequency domain resource, and the The first number is the number of pre-demodulation reference signal DMRS symbols corresponding to the first sub-frequency domain resource, and the second number is the number of pre-DMRS symbols corresponding to the second sub-frequency domain resource, or the first number Be the quantity of the DMRS code division multiplexing CDM group that is not used to bear data corresponding to this first sub-frequency domain resource, this second quantity is the quantity of the DMRS CDM group that is not used to bear data corresponding to this second sub-frequency domain resource.
  • the transceiving module 11 is further configured to send second indication information to the terminal device, where the second information is used to indicate the first sub-frequency domain resource in the first frequency domain resource.
  • the second sub-frequency domain resource is a frequency domain resource in the first frequency domain resource except the first sub-frequency domain resource.
  • the transceiver module 11 is further configured to send second indication information to the terminal device, where the second indication information is used to indicate that other frequency domain resources in the first frequency domain resource except the second frequency domain resource belong to the The frequency domain resource of the first sub-frequency domain resource, wherein the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.
  • 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 the second frequency domain resource
  • Other resource block groups outside the second frequency domain resource belong to the second sub-frequency domain resource
  • the second sub-indication information is used to indicate one or more second resource block groups in the second frequency domain resource, and the one or more second sub-frequency domain resources
  • the resource block group belongs to the second sub-frequency domain resource, and other resource block groups in the second frequency domain resource except the one or more second resource block groups belong to the first sub-frequency domain resource, or the second sub-frequency domain resource
  • the indication information is used to indicate the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRS CDM groups not used
  • the first frequency domain resource belongs to the third frequency domain resource
  • the third frequency domain resource satisfies at least one of the following: the number of resource blocks included in the third frequency domain resource is not M, and the M belongs to the preset first A number set; the number of resource blocks included in the third frequency domain resource is N, and the N belongs to a preset second number set; the number of resource blocks included in the third frequency domain resource and the number of resource blocks included in the first resource block group include The relationship between the quantities of the resource blocks satisfies the first preset condition.
  • the device further includes: a processing module 12, configured to acquire pattern information, and the pattern information is used to indicate the mapping relationship between multiple patterns and multiple index values, wherein the first frequency domain resource and the multiple index values corresponding to the value, or the pattern information is used to indicate the mapping relationship between multiple patterns and multiple index values, and the corresponding relationship between the first frequency domain resource and the multiple index values, and each pattern is used to indicate The number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRS CDM groups that are not used to carry data; the processing module 12 is also used to, according to the pattern information, and the second The number of pre-DMRS symbols corresponding to each resource block group in the frequency domain resource or the number of DMRS CDM groups not used to carry data determines the first index value, and the first indication information includes the first index value.
  • a processing module 12 configured to acquire pattern information, and the pattern information is used to indicate the mapping relationship between multiple patterns and multiple index values, wherein the first frequency domain resource and the multiple index values corresponding to the
  • the ratio of the number of resource block groups included in the first frequency domain resource to the number of resource block groups included in the third frequency domain resource and the number of resource blocks included in the resource block group satisfy the first corresponding relationship.
  • the transceiving module 11 is further configured to send third information to the terminal device, where the third information is used to indicate the first quantity or the second quantity.
  • the communication device 10 may correspond to the terminal device in the foregoing method embodiments.
  • the communication device 10 may correspond to the terminal device in the method 600 according to the embodiment of the present application, the communication device 10 may include a module for performing the operations performed by the terminal device in the corresponding method, and the communication device Each unit in 10 is to implement the operations performed by the terminal device in the corresponding method.
  • the transceiver module 11 is configured to perform steps S601, S602, S603, and S604.
  • the transceiver module 11 is configured to receive first indication information from a network device, where the first indication information is used to indicate a first frequency domain resource; the transceiver module 11 is also configured to Receive the physical downlink shared channel PDSCH on the first frequency domain resource based on the first indication information, where the first number of the PDSCH is different from the second number of the PDSCH, and the first frequency domain resource includes a first sub-frequency domain resource and the second sub-frequency domain resources, the first number is the number of pre-demodulation reference signal DMRS symbols corresponding to the first sub-frequency domain resources, and the second number is the pre-DMRS symbols corresponding to the second sub-frequency domain resources The number of symbols, or the first number is the number of DMRS code division multiplexing CDM groups corresponding to the first frequency sub-frequency domain resource that are not used to carry data, and the second number is the number of CDM groups that are not used for carrying data corresponding to the second frequency sub-frequency domain resource. Number of DMRS CDM
  • the transceiving module 11 is further configured to receive second indication information, where the second indication information is used to indicate the first sub-frequency domain resource in the first frequency domain resource.
  • the second sub-frequency domain resource is a frequency domain resource in the first frequency domain resource except the first sub-frequency domain resource.
  • the transceiver module 11 is further configured to receive second indication information, and the second indication information is used to indicate that other frequency domain resources in the first frequency domain resources except the second frequency domain resources belong to the first sub-frequency The frequency domain resource of the frequency domain resource, wherein the second frequency domain resource is a predetermined frequency domain resource in the first frequency domain resource.
  • 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 the second frequency domain resource
  • One or more resource block groups in the resource the one or more resource block groups belong to the first sub-frequency domain resource, and the other resource block groups in the second frequency domain resource except the one or more resource block groups Belonging to the second sub-frequency domain resource
  • the second sub-indication information is used to indicate one or more resource block groups in the second frequency domain resource, and the one or more resource block groups belong to the second sub-frequency domain Resources, other resource block groups in the second frequency domain resource except the one or more resource block groups belong to the first sub-frequency domain resource, or the second sub-indication information is used to indicate that in the second frequency domain resource
  • the number of pre-DMRS symbols corresponding to each resource block group or the number of DMR CDM groups not used to carry data wherein the number of pre-DMRS symbols in the second frequency domain resource or the number
  • the first frequency domain resource belongs to the third frequency domain resource
  • the third frequency domain resource satisfies at least one of the following: the number of resource blocks included in the third frequency domain resource is not M, and the M belongs to the preset first A number set; the number of resource blocks included in the third frequency domain resource is N, and the N belongs to a preset second number set; the number of resource blocks included in the third frequency domain resource and the number of resource blocks included in the first resource block group include The relationship between the quantities of the resource blocks satisfies the first preset condition.
  • the device further includes: a processing module 12, configured to acquire pattern information, and the pattern information is used to indicate the mapping relationship between multiple patterns and multiple index values, wherein the first frequency domain resource and the multiple index values corresponding to the value, or the pattern information is used to indicate the mapping relationship between multiple patterns and multiple index values, and the corresponding relationship between the first frequency domain resource and the multiple index values, and each pattern is used to indicate The number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMRSCDM groups not used to carry data; the first indication information includes a first index value, and the processing module 12 is also used Based on the pattern corresponding to the first index value, the number of pre-DMRS symbols corresponding to each resource block group in the second frequency domain resource or the number of DMR CDM groups not used to carry data is determined.
  • a processing module 12 configured to acquire pattern information, and the pattern information is used to indicate the mapping relationship between multiple patterns and multiple index values, wherein the first frequency domain resource and the multiple index values corresponding to the value, or the pattern
  • the ratio of the number of resource block groups included in the first frequency domain resource to the number of resource block groups included in the third frequency domain resource and the number of resource blocks included in the resource block group satisfy the first corresponding relationship
  • the third The frequency domain resource includes the first frequency domain resource
  • the transceiving module 11 is further configured to receive third indication information, where the third indication information is used to indicate the first quantity or the second quantity.
  • FIG. 10 is a schematic diagram of an apparatus 20 for resource allocation provided by an embodiment of the present application.
  • the apparatus 20 may be a network device, or may be a chip or a chip system on the network device.
  • the device 20 may be a terminal device, including various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, and various forms of The terminal, mobile station, terminal, user equipment, soft terminal, etc. may also be a chip or a chip system on the terminal equipment.
  • the device 20 may include a processor 21 (ie, an example of a processing module) and a memory 22 .
  • the memory 22 is used to store instructions
  • the processor 21 is used to execute the instructions stored in the memory 22, so that the device 20 realizes the execution of the equipment in the above-mentioned various possible designs in the corresponding methods as shown in Fig. 4 to Fig. 9 step.
  • the device 20 may also include an input port 23 (ie, an example of a transceiver module) and an output port 24 (ie, another example of a transceiver module).
  • the processor 21 , the memory 22 , the input port 23 and the output port 24 can communicate with each other through internal connection paths, and transmit control and/or data signals.
  • the memory 22 is used to store a computer program, and the processor 21 can be used to call and run the computer program from the memory 22, to control the input port 23 to receive signals, and to control the output port 24 to send signals, so as to complete the terminal equipment or Steps of the radio access network device or UE or base station.
  • the memory 22 can be integrated in the processor 21 or can be set separately from the processor 21 .
  • the input port 23 is a receiver
  • the output port 24 is a transmitter.
  • the receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.
  • the input port 23 is an input interface
  • the output port 24 is an output interface
  • the functions of the input port 23 and the output port 34 may be realized by a transceiver circuit or a dedicated chip for transceiver.
  • the processor 21 may be realized by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.
  • a general-purpose computer to implement the device provided in the embodiment of the present application.
  • the program codes to realize the functions of the processor 21 , the input port 23 and the output port 24 are stored in the memory 22 , and the general processor realizes the functions of the processor 21 , the input port 23 and the output port 24 by executing the codes in the memory 22 .
  • each module or unit in the apparatus 20 can be used to execute each action or process performed by the device (for example, terminal device) performing random access in the above method, and here, in order to avoid redundant description, its detailed description is omitted.
  • the processor may be a central processing unit (CPU, central processing unit), and the processor may also be other general-purpose processors, digital signal processors (DSP, digital signal processor), dedicated integrated Circuit (application specific integrated circuit, ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA off-the-shelf programmable gate array
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • the embodiment of the present application also provides a computer-readable storage medium, on which computer instructions for implementing the method executed by the network device or the terminal device in the above method embodiments are stored.
  • the computer when the computer program is executed by a computer, the computer can implement the method performed by the network device or the terminal device in the above method embodiments.
  • the embodiment of the present application also provides a computer-readable storage medium, on which computer instructions for implementing the method executed by the network device or the terminal device in the above method embodiments are stored.
  • the computer when the computer program is executed by a computer, the computer can implement the method performed by the network device or the terminal device in the above method embodiments.
  • the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories.
  • the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory can be random access memory (RAM), which acts as external cache memory.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • Double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced SDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous connection dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • the above-mentioned embodiments may be implemented in whole or in part by software, hardware, firmware or other arbitrary combinations.
  • the above-described embodiments may be implemented in whole or in part in the form of computer program products.
  • the computer program product comprises one or more computer instructions or computer programs.
  • the processes or functions according to the embodiments of the present application will be generated in whole or in part.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center that includes one or more sets of available media.
  • the available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media.
  • the semiconductor medium may be a solid state drive.
  • sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande concerne un procédé et un appareil de configuration de ressources. Le procédé comprend les étapes suivantes : un dispositif de réseau indique une première ressource de domaine fréquentiel à un dispositif terminal, et le dispositif terminal reçoit un canal partagé de liaison descendante physique sur la base de la première ressource de domaine fréquentiel, la première ressource de domaine fréquentiel comprenant deux ressources de sous-domaine fréquentiel, et le nombre de signaux de référence de pré-démodulation (DMRS) correspondant respectivement aux deux ressources de sous-domaine fréquentiel étant différent, ou le nombre de groupes de multiplexage par répartition de codes (CDM) DMRS qui ne sont pas utilisés pour porter des données et correspondent respectivement aux deux ressources de sous-domaine fréquentiel étant différent. Selon le procédé et l'appareil divulgués dans la présente demande, le nombre de symboles pré-DMRS ou le nombre de groupes CDM DMRS qui ne sont pas utilisés pour porter des données sur une ressource de domaine fréquentiel planifiée est configuré pour être différent selon l'exigence de communication, de sorte que la configuration de ressource flexible sur un domaine fréquentiel soit réalisée, ce qui permet de réduire les ressources de transmission.
PCT/CN2022/092503 2021-05-31 2022-05-12 Procédé et appareil de configuration de ressource WO2022252954A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110605573.7 2021-05-31
CN202110605573.7A CN115484675A (zh) 2021-05-31 2021-05-31 资源配置的方法及装置

Publications (1)

Publication Number Publication Date
WO2022252954A1 true WO2022252954A1 (fr) 2022-12-08

Family

ID=84322775

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/092503 WO2022252954A1 (fr) 2021-05-31 2022-05-12 Procédé et appareil de configuration de ressource

Country Status (2)

Country Link
CN (1) CN115484675A (fr)
WO (1) WO2022252954A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110166200A (zh) * 2018-02-13 2019-08-23 华为技术有限公司 通信过程中获知资源单元数量的方法和相关装置
CN110912656A (zh) * 2018-09-14 2020-03-24 华为技术有限公司 一种通信方法及装置
WO2020144639A1 (fr) * 2019-01-11 2020-07-16 Telefonaktiebolaget Lm Ericsson (Publ) Attribution de ressources de domaines fréquentiels pour transmission de sources multiples
WO2020205741A1 (fr) * 2019-03-29 2020-10-08 Apple Inc. Attribution de ressources et améliorations de capacité de multiplexage d'utilisateurs pour des formats de canal de commande de liaison montante physique basés sur des entrelacements dans une nouvelle radio (nr) sans licence
WO2020222606A1 (fr) * 2019-05-02 2020-11-05 엘지전자 주식회사 Procédé d'émission et de réception de signal de référence de suivi de phase dans un système de communication sans fil, et appareil associé
CN112399566A (zh) * 2019-08-14 2021-02-23 华为技术有限公司 处理数据的方法和通信装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110166200A (zh) * 2018-02-13 2019-08-23 华为技术有限公司 通信过程中获知资源单元数量的方法和相关装置
CN110912656A (zh) * 2018-09-14 2020-03-24 华为技术有限公司 一种通信方法及装置
WO2020144639A1 (fr) * 2019-01-11 2020-07-16 Telefonaktiebolaget Lm Ericsson (Publ) Attribution de ressources de domaines fréquentiels pour transmission de sources multiples
WO2020205741A1 (fr) * 2019-03-29 2020-10-08 Apple Inc. Attribution de ressources et améliorations de capacité de multiplexage d'utilisateurs pour des formats de canal de commande de liaison montante physique basés sur des entrelacements dans une nouvelle radio (nr) sans licence
WO2020222606A1 (fr) * 2019-05-02 2020-11-05 엘지전자 주식회사 Procédé d'émission et de réception de signal de référence de suivi de phase dans un système de communication sans fil, et appareil associé
CN112399566A (zh) * 2019-08-14 2021-02-23 华为技术有限公司 处理数据的方法和通信装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ETRI: "Discussion on DMRS design for data channel", 3GPP DRAFT; R1-1704946 DISCUSSION ON DMRS DESIGN FOR DATA CHANNEL_FINAL, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Spokane, USA; 20170403 - 20170407, 25 March 2017 (2017-03-25), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051251625 *

Also Published As

Publication number Publication date
CN115484675A (zh) 2022-12-16

Similar Documents

Publication Publication Date Title
US10979194B2 (en) Resource indication method, user equipment, and network device
CN108347778B (zh) 通信方法及装置
US8873489B2 (en) Signaling methods for UE-specific dynamic downlink scheduler in OFDMA systems
WO2020221055A1 (fr) Procédé permettant de recevoir des données et d'envoyer des données, et appareil de communication
WO2019029366A1 (fr) Procédé, appareil et système de réglage d'une ressource du domaine fréquentiel et d'émission d'informations d'indication
CN113994749A (zh) 数据传输的方法和设备
WO2018082544A1 (fr) Procédé et appareil de communication sans fil
US20210160852A1 (en) Resource configuration method and terminal device
WO2019062585A1 (fr) Procédé de planification de ressources, dispositif de réseau, et dispositif terminal
CN109831827B (zh) 数据传输方法、终端和基站
WO2018027982A1 (fr) Procédé et appareil d'envoi de signal de référence et procédé et appareil de réception de signal de référence
US11121848B2 (en) Communication method and network device
WO2020221321A1 (fr) Procédé de communication et appareil de communication
WO2018202126A1 (fr) Procédé, terminal et dispositif pour la transmission de données
WO2018127071A1 (fr) Dispositif de communication et procédé d'envoi de signal de référence
WO2020216130A1 (fr) Procédé et appareil de communication
TW202008828A (zh) 資源配置的方法和終端設備
WO2020238992A1 (fr) Procédé et appareil de communication
US20230345284A1 (en) Downlink signal processing method and apparatus
WO2022036529A1 (fr) Procédés d'envoi et de réception de signal de référence de suivi de phase, et dispositif de communication
WO2022252954A1 (fr) Procédé et appareil de configuration de ressource
WO2022205022A1 (fr) Procédé et appareil de transmission d'un signal de référence
WO2023045751A1 (fr) Procédé d'indication de port de signal de référence de démodulation (dmrs)
WO2023116809A1 (fr) Procédé et appareil de communication
WO2022001638A1 (fr) Procédé et appareil de communication

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22815001

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22815001

Country of ref document: EP

Kind code of ref document: A1