WO2023207476A1 - 一种通信方法、装置及设备 - Google Patents

一种通信方法、装置及设备 Download PDF

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Publication number
WO2023207476A1
WO2023207476A1 PCT/CN2023/084299 CN2023084299W WO2023207476A1 WO 2023207476 A1 WO2023207476 A1 WO 2023207476A1 CN 2023084299 W CN2023084299 W CN 2023084299W WO 2023207476 A1 WO2023207476 A1 WO 2023207476A1
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WIPO (PCT)
Prior art keywords
port
resource
reference signal
dmrs
symbol
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PCT/CN2023/084299
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English (en)
French (fr)
Inventor
阮良
刘鹍鹏
高翔
董昶钊
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华为技术有限公司
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Publication of WO2023207476A1 publication Critical patent/WO2023207476A1/zh

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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
    • 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
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

Definitions

  • the present application relates to the field of communication technology, and in particular, to a communication method, device and equipment.
  • DMRS Demodulation reference signal
  • data channels e.g., physical downlink shared channel (PDSCH)
  • control channels e.g., physical downlink control channel (PDCCH)
  • PDSCH physical downlink shared channel
  • PDCCH physical downlink control channel
  • a DMRS port corresponds to a spatial layer, and each spatial layer corresponds to a transport stream.
  • MIMO multiple input and multiple output
  • the required number of DMRS ports is R.
  • the fifth generation ( 5th , 5G) new radio (NR) supports two DMRS resource mapping types, namely configuration type 1 (Type 1) DMRS and configuration type 2 (Type 2) DMRS.
  • Type 1 DMRS can support up to 4 orthogonal DMRS ports
  • Type 2 DMRS can support up to 6 orthogonal DMRS ports. Therefore, for single-symbol DMRS configuration, currently NR can only support up to 6 streams of MIMO transmission.
  • the number of terminal devices will further increase, which will put higher demands on the number of MIMO transmission streams.
  • the number of transmitting and receiving antennas will further increase (for example, the number of transmitting antennas of network equipment supports 128T or 256T, and the number of receiving antennas of terminals is 8R), and the acquisition of channel information will be more accurate. , which can further support a higher number of transmission streams to improve the spectral efficiency of the MIMO system. This will inevitably require more DMRS ports to support a higher number of transmission streams (a single symbol is greater than 6 streams).
  • This application provides a communication method, device and equipment for supporting more transmission streams.
  • inventions of the present application provide a communication method.
  • the method includes:
  • the sending device may send the reference signal through the first resource and the second resource.
  • the first resource is located in the first OFDM symbol
  • the second resource is located in the second OFDM symbol
  • the first OFDM symbol and the second OFDM symbol are not adjacent.
  • the first port belongs to the first port set or the second port set
  • the reference signal corresponding to the port in the first port set corresponds to the first mask on the first resource and the second resource
  • the reference signal corresponding to the port in the second port set The reference signal corresponds to the second mask on the first resource and the second resource, and the first mask and the second mask are different.
  • the sending device can transmit the reference signal through resources on multiple non-adjacent OFDM symbols; and,
  • the resources of the reference signals corresponding to the ports in the first port set on the plurality of OFDM symbols correspond to the first mask, and the resources of the reference signals corresponding to the ports in the first port set on the plurality of OFDM symbols correspond to the second mask,
  • the first mask and the second mask are different, so that the number of ports can be expanded through multiple non-adjacent OFDM symbols, thereby supporting more transmission streams.
  • the first OFDM symbol is a preamble DMRS symbol
  • the second OFDM symbol is an additional DMRS symbol.
  • This design can increase the number of DMRS ports through existing additional DMRS symbols, thereby increasing the number of DMRS ports and supporting more transmission streams without occupying additional resources.
  • the sending device may receive the first indication information from the network device.
  • the first indication information may be used to instruct the reference signal corresponding to the first port to be sent in a first manner; the first manner is to send the reference signal of the first port through the first resource and the second resource.
  • the sending device can use the first method to transmit the reference signal corresponding to the first port under the instruction of the network device.
  • the network device can flexibly configure the way the sending device sends the reference signal, thereby adapting to the DMRS channel estimation capability in different scenarios.
  • the first indication information includes a first port index, and the first port index may be used to indicate the first mode.
  • the design is easy to implement.
  • the above method further includes: after receiving the second indication information from the network device, the sending device sends the reference signal corresponding to the first port through the third resource and the fourth resource.
  • the second indication information may be used to instruct the reference signal corresponding to the first port to be sent in a second manner; the second manner is to send the reference signal of the first port through a third resource and a fourth resource.
  • the third resource and the fourth resource may be located on different frequency domain resources, and the reference signals corresponding to the ports in the first port set correspond to the third mask on the third resource and the fourth resource, and the second port The reference signal corresponding to the port in the set corresponds to the fourth mask on the third resource and the fourth resource, and the third mask and the fourth mask are different.
  • the sending device can use the second method to transmit the reference signal corresponding to the first port under the instruction of the network device.
  • the network device can flexibly configure the way the sending device sends the reference signal, thereby adapting to the DMRS channel estimation capability in different scenarios.
  • the second indication information includes a second port index, and the second port index can be used to indicate the second mode.
  • the design is easy to implement.
  • the above method further includes: after receiving the third indication information from the network device, the sending device may send the reference signal corresponding to the first port through the fifth resource or the sixth resource.
  • the third indication information may be used to instruct the reference signal corresponding to the first port to be sent in a third manner.
  • the third way is: when the first port belongs to the first port set, send the reference signal corresponding to the first port through the fifth resource; when the first port belongs to the second port set, send the reference signal corresponding to the first port through the sixth resource. reference signal.
  • the fifth resource and the sixth resource are located on different frequency domain resources.
  • the sending device can use a third method to transmit the reference signal corresponding to the first port under the instruction of the network device.
  • the network device can flexibly configure the way the sending device sends the reference signal, thereby adapting to the DMRS channel estimation capability in different scenarios.
  • the third indication information includes a third port index, and the third port index can be used to indicate the third mode.
  • the design is easy to implement.
  • the elements in the sequence of the reference signal corresponding to the first port correspond to the REs in the first resource one-to-one, and the elements in the sequence of the reference signal corresponding to the first port correspond to the REs in the second resource.
  • One-to-one correspondence. pass In this design, the reference signals corresponding to the ports in the first port set and the second port set can be repeatedly mapped to the first resource and the second resource; and, the reference signals corresponding to the ports in the first port set are on the multiple OFDM symbols.
  • the resources correspond to the first mask, and the resources of the reference signals corresponding to the ports in the first port set on the multiple OFDM symbols correspond to the second mask.
  • the first mask and the second mask are different, so that non-adjacent Multiple OFDM symbols extend the number of ports, thereby supporting more transmission streams.
  • the sequence of reference signals corresponding to the first port includes one of the following elements: 2, 4, 6, 8, or 12.
  • the sending device may send the reference signal corresponding to the first port in the first manner. ; In other words, for edge subbands, the number of ports can be increased through TD-OCC.
  • the sending device may send the reference signal corresponding to the first port in the second manner; in other words, for the non-edge subband For edge subbands, the number of ports can be increased through FD-OCC.
  • embodiments of the present application provide a communication method.
  • the method includes: the receiving device can receive the reference signal corresponding to the first port through the first resource and the second resource.
  • the first resource is located in the first orthogonal frequency division multiplexing OFDM symbol
  • the second resource is located in the second OFDM symbol
  • the first OFDM symbol and the second OFDM symbol are not adjacent.
  • the first port belongs to the first port set or the second port set
  • the reference signal corresponding to the port in the first port set corresponds to the first mask on the first resource and the second resource
  • the reference signal corresponding to the port in the second port set The reference signal corresponds to the second mask on the first resource and the second resource, and the first mask and the second mask are different.
  • the receiving device can receive the reference signal through the resources on multiple non-adjacent OFDM symbols; and the reference signal corresponding to the port in the first port set on the multiple OFDM symbols corresponds to the first mask,
  • the resources of the reference signals corresponding to the ports in the first port set on the multiple OFDM symbols correspond to the second mask.
  • the first mask and the second mask are different, so that the number of ports can be expanded through multiple non-adjacent OFDM symbols. , which can support more transmission streams.
  • the first OFDM symbol is a preamble DMRS symbol
  • the second OFDM symbol is an additional DMRS symbol.
  • This design can increase the number of DMRS ports through existing additional DMRS symbols, thereby increasing the number of DMRS ports and supporting more transmission streams without occupying additional resources.
  • the receiving device may also send the first indication information.
  • the first indication information may be used to instruct the reference signal corresponding to the first port to be sent in a first manner; the first manner is to send the reference signal of the first port through the first resource and the second resource.
  • the receiving device can flexibly configure the way the sending device sends reference signals, thereby adapting to the DMRS channel estimation capabilities in different scenarios.
  • the first indication information includes a first port index, and the first port index may be used to indicate the first mode.
  • the design is easy to implement.
  • the above method further includes: after sending the second indication information, the receiving device may receive the reference signal corresponding to the first port through the third resource and the fourth resource.
  • the second indication information may be used to instruct the reference signal corresponding to the first port to be sent in a second manner; the second manner is to send the reference signal of the first port through a third resource and a fourth resource.
  • the third resource and the fourth resource are located on different frequency domain resources; and the reference signals corresponding to the ports in the first port set correspond to the third mask on the third resource and the fourth resource, and the second port set middle end
  • the reference signal corresponding to the port corresponds to the fourth mask on the third resource and the fourth resource, and the third mask and the fourth mask are different.
  • the receiving device can flexibly configure the way the sending device sends reference signals, thereby adapting to the DMRS channel estimation capabilities in different scenarios.
  • the second indication information includes a second port index, and the second port index is used to indicate the second mode.
  • the design is easy to implement.
  • the above method further includes: after sending the third indication information, the receiving device may receive the reference signal corresponding to the first port through the fifth resource or the sixth resource.
  • the third indication information may be used to instruct the reference signal corresponding to the first port to be sent in a third manner.
  • the third way is: when the first port belongs to the first port set, send the reference signal corresponding to the first port through the fifth resource; when the first port belongs to the second port set, send the reference signal corresponding to the first port through the sixth resource. reference signal.
  • the fifth resource and the sixth resource are located on different frequency domain resources.
  • the receiving device can flexibly configure the way the sending device sends reference signals, thereby adapting to the DMRS channel estimation capabilities in different scenarios.
  • the third indication information includes a third port index, and the third port index can be used to indicate the third mode.
  • the design is easy to implement.
  • the elements in the sequence of the reference signal corresponding to the first port correspond one-to-one to the resource elements RE in the first resource
  • the elements in the sequence of the reference signal corresponding to the first port correspond to the resource elements RE in the second resource.
  • the RE corresponds one to one.
  • the reference signals corresponding to the ports in the first port set and the second port set can be repeatedly mapped to the first resource and the second resource; and, the reference signals corresponding to the ports in the first port set are in the multiple OFDM symbols.
  • the resources on the multiple OFDM symbols correspond to the first mask
  • the resources of the reference signals corresponding to the ports in the first port set on the multiple OFDM symbols correspond to the second mask.
  • the first mask and the second mask are different, so that different channels can be used. Multiple adjacent OFDM symbols expand the number of ports, thereby supporting more transmission streams.
  • the sequence of reference signals corresponding to the first port includes one of the following elements: 2, 4, 6, 8, or 12.
  • the receiving device may receive the first port sent by the sending device in the first manner.
  • Corresponding reference signal in other words, for edge subbands, the number of ports can be increased through TD-OCC.
  • the resource used to transmit the reference signal for example, the third resource and/or the fourth resource
  • the receiving device receives the reference signal corresponding to the first port sent by the sending device in the second manner; in other words , for non-edge subbands, the number of ports can be increased through FD-OCC.
  • embodiments of the present application provide a communication device, including a unit for performing each of the steps in any of the above aspects.
  • embodiments of the present application provide a communication device, including at least one processing element and at least one storage element, wherein the at least one storage element is used to store programs and data, and the at least one processing element is used to read and execute The storage element stores programs and data, so that the method provided by any of the above aspects of this application is implemented.
  • embodiments of the present application provide a communication system, including: a sending device for performing the method provided by the first aspect, and a receiving device used for performing the method provided by the second aspect.
  • embodiments of the present application also provide a computer program, which when the computer program is run on a computer, causes the computer to execute the method provided in any of the above aspects.
  • embodiments of the present application further provide a computer-readable storage medium, wherein the computer-readable storage medium
  • the computer program is stored in the substance, and when the computer program is executed by the computer, the computer is caused to execute the method provided in any of the above aspects.
  • embodiments of the present application also provide a chip, which is used to read the computer program stored in the memory and execute the method provided in any of the above aspects.
  • embodiments of the present application also provide a chip system.
  • the chip system includes a processor and is used to support a computer device to implement the method provided in any of the above aspects.
  • the chip system further includes a memory, and the memory is used to store necessary programs and data of the computer device.
  • the chip system can be composed of chips or include chips and other discrete devices.
  • Figure 1 is a schematic architectural diagram of a communication system provided by an embodiment of the present application.
  • Figure 2 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • Figure 3 is a schematic structural diagram of another network device provided by an embodiment of the present application.
  • Figure 4 is a schematic diagram of the Type 1 DMRS time-frequency resource mapping method
  • Figure 5 is a schematic diagram of the Type 2 DMRS time-frequency resource mapping method
  • Figure 6A is a schematic diagram of a configuration pattern of additional DMRS
  • Figure 6B is a schematic diagram of another configuration pattern of additional DMRS
  • Figure 7 is a schematic flow chart of a communication method provided by an embodiment of the present application.
  • Figure 8 is a schematic diagram of the first time-frequency resource mapping method provided by the embodiment of the present application.
  • Figure 9 is a schematic diagram of the second time-frequency resource mapping method provided by the embodiment of the present application.
  • Figure 10 is a schematic diagram of the third time-frequency resource mapping method provided by the embodiment of the present application.
  • Figure 11 is a schematic diagram of the fourth time-frequency resource mapping method provided by the embodiment of the present application.
  • Figure 12 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Figure 13 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • This application provides a communication method, device and equipment to support more transmission streams.
  • the method, device and equipment are based on the same technical concept. Since the principles of solving the problem are similar, the implementation of the device, device and method can be referred to each other, and the repeated details will not be repeated.
  • the sending device can send the reference signal through the first resource and the second resource.
  • the first port belongs to a first port set or a second port set, the first resource is located in a first orthogonal frequency division multiplexing (OFDM) symbol, the second resource is located in a second OFDM symbol, and the first OFDM symbol and the second OFDM symbol are not adjacent.
  • the reference signal corresponding to the port in the first port set corresponds to the first mask on the first resource and the second resource, and the reference signal corresponding to the port in the second port set corresponds to the second mask on the first resource and the second resource.
  • Mask correspondence, the first mask and the second mask are different.
  • the sending device can transmit the reference signal through the resources on multiple non-adjacent OFDM symbols; and the resources of the reference signal corresponding to the port in the first port set on the multiple OFDM symbols correspond to the first mask, first port The resources of the reference signals corresponding to the ports in the set on the multiple OFDM symbols correspond to the second mask.
  • the first mask and the second mask are different, so that the number of ports can be expanded through multiple non-adjacent OFDM symbols, and thus the number of ports can be expanded. Supports more transport streams.
  • Terminal equipment is a device that provides voice and/or data connectivity to users.
  • Terminal equipment can also be called user equipment (UE), terminal, access terminal, terminal unit, terminal station, mobile station (MS), remote station, remote terminal, mobile terminal (mobile terminal) , MT), wireless communication equipment, customer premise equipment (CPE), terminal agent or terminal equipment, etc.
  • the terminal device can be a handheld device with a wireless connection function, a vehicle with a communication function, a vehicle-mounted device (such as a vehicle-mounted communication device, a vehicle-mounted communication chip), etc.
  • a vehicle-mounted device such as a vehicle-mounted communication device, a vehicle-mounted communication chip
  • some examples of terminal devices are: mobile phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (personal digital assistant) , PDA) device, handheld device with wireless communication function, computing device or other processing device connected to a wireless modem, tablet computer, computer with wireless transceiver function, notebook computer, handheld computer, mobile Internet device (MID) ), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, remote Wireless terminals in remote medical surgery, wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, smart home Wireless terminals in etc.
  • SIP session
  • Network equipment is a device in a mobile communication system that connects terminal equipment to a wireless network.
  • network equipment can also be called a base station, a radio access network (RAN) node (or device), an access point (AP), or an access network. ,AN) equipment.
  • RAN radio access network
  • AP access point
  • AN access network
  • network equipment are: new generation Node B (gNB), transmission reception point (TRP), evolved Node B (evolved Node B, eNB), wireless network controller (radio network controller, RNC), Node B (Node B, NB), base station controller (BSC), base transceiver station (BTS), transmission point (transmitting and receiving point, TRP), transmitting point (transmitting point, TP), mobile switching center, home base station (for example, home evolved NodeB, or home Node B, HNB), or baseband unit (base band unit, BBU), etc.
  • gNB new generation Node B
  • TRP transmission reception point
  • eNB evolved Node B
  • eNB evolved Node B
  • wireless network controller radio network controller
  • Node B Node B
  • BSC base station controller
  • BTS base transceiver station
  • TRP transmitting and receiving point
  • TP transmitting point
  • mobile switching center home base station (for example, home evolved NodeB, or home Node B, HNB), or
  • Spatial layer For spatial multiplexing MIMO systems, multiple parallel data streams can be transmitted simultaneously on the same frequency domain resources, and each data stream is called a spatial layer.
  • the spatial layer in MIMO can also be called the transmission layer, data layer, spatial stream, etc.
  • edge subband when When , the number of RBs included is or subband.
  • P′ BWP.i is the bandwidth of the scheduled subband, that is, the number of RBs included in the scheduled subband, and is a value among ⁇ 2, 4 ⁇ .
  • OFDM symbols can also be called symbols.
  • the number of nouns means “singular noun or plural noun", that is, “one or more”, unless otherwise specified.
  • “At least one” means one or more, and “plurality” means two or more.
  • “And/or” describes the relationship between associated objects, indicating that there can be three relationships.
  • a and/or B can mean: A alone exists, A and B exist simultaneously, and B alone exists.
  • the character “/” generally indicates that the related objects are an "or” relationship. Tie.
  • A/B means: A or B.
  • “At least one of the following” or similar expressions refers to any combination of these items (items), including any combination of a single item (items) or a plurality of items (items).
  • Figure 1 shows the structure of a mobile communication system to which the method provided by the embodiment of the present application is applicable.
  • the system includes: network equipment and terminal equipment.
  • the network device is an entity on the network side that can receive and transmit wireless signals. It is responsible for providing wireless access-related services to terminal devices within its coverage, and realizing physical layer functions, resource scheduling and wireless resource management, and service quality ( Quality of Service (QoS) management, wireless access control and mobility management functions.
  • QoS Quality of Service
  • the terminal device is an entity on the user side that can receive and transmit wireless signals, and needs to access the network through the network device.
  • the terminal device may be a variety of devices that provide voice and/or data connectivity to users.
  • the terminal device may have multiple transmitting antennas and multiple receiving antennas, has multiple transmitting capabilities and multiple receiving capabilities, and can transmit signals through multiple transmitting channels and receive signals through multiple receiving channels.
  • the network device may also have multiple transmitting antennas and multiple receiving antennas, and has multiple transmitting capabilities and multiple receiving capabilities.
  • the system may also be called a MIMO system.
  • network equipment can be divided into centralized unit (CU) nodes and at least one distributed unit (DU).
  • the CU can be used to manage or control at least one DU, and can also be called a connection between the CU and at least one DU.
  • This structure can separate the protocol layers of network equipment in the communication system. Some of the protocol layers are placed under centralized control on the CU, and some or all of the remaining protocol layer functions are distributed in the DU, and the CU centrally controls the DU.
  • the protocol layer of gNB includes radio resource control (RRC) layer, service data adaptation protocol (SDAP) layer, and packet data convergence protocol (packet data convergence protocol).
  • RRC radio resource control
  • SDAP service data adaptation protocol
  • PDCP packet data convergence protocol
  • RLC radio link control
  • MAC media access control sublayer
  • CU can be used to implement the functions of the RRC layer, SDAP layer and PDCP layer
  • DU can be used to implement the functions of the RLC layer, MAC layer and physical layer.
  • the embodiments of this application do not specifically limit the protocol stacks included in CU and DU.
  • the CU in the embodiment of the present application can be further divided into a control plane (CU-control plane, CU-CP) network element and multiple user plane (CU-user plane, CU-UP) network elements.
  • CU-CP can be used for control plane management
  • CU-UP can be used for user plane data transmission.
  • the interface between CU-CP and CU-UP can be the E1 port.
  • the interface between CU-CP and DU can be F1-C, which is used for the transmission of control plane signaling.
  • the interface between CU-UP and DU can be F1-U, which is used for user plane data transmission.
  • CU-UP and CU-UP can be connected through the Xn-U port for user plane data transmission.
  • the structure of gNB can be shown in Figure 3.
  • the mobile communication system shown in Figure 1 is an example and does not limit the communication systems to which the methods provided by the embodiments of the present application are applicable.
  • the methods and devices provided by the embodiments of the present application are applicable to communication systems and application scenarios in which various terminal devices support multiple transmission capabilities. That is, the embodiments of the present application can also be applied to communication systems of various types and standards, such as 5G.
  • LTE Long Term Evolution
  • NR wireless-fidelity
  • WiMAX wireless-fidelity
  • V2X world interoperability for microwave access
  • MTC Machine Type Communications
  • IoT Internet of things
  • 3GPP 3rd generation partnership project
  • DMRS can be used to estimate the equivalent channel experienced by a data channel (such as PDSCH) or a control channel (such as PDCCH), or to estimate the equivalent channel matrix experienced by a data channel (such as PDSCH) or a control channel (such as PDCCH), thereby For data detection and demodulation.
  • the channel can produce a certain weight or change on the experienced signal (for example, a change in amplitude, phase, or frequency, etc.).
  • the channel can also be called the channel response, and the channel response can be expressed by the channel response coefficient.
  • the receiving end can use the channel estimation algorithm to obtain an estimate of the equivalent channel based on the known DMRS vector s. Then, the receiving end can complete MIMO equalization and demodulation based on the equivalent channel.
  • DMRS is used to estimate the equivalent channel, and its dimension is N R ⁇ R.
  • NR is the number of receiving antennas, and R is the number of transmission streams (rank, that is, the number of data streams or the number of spatial layers).
  • R is the number of transmission streams (rank, that is, the number of data streams or the number of spatial layers).
  • one DMRS port (which may be referred to as a port in this application) corresponds to one spatial layer. Therefore, for MIMO transmission with R transmission stream number, the required number of DMRS ports is R.
  • different DMRS ports are usually orthogonal ports, thereby avoiding interference between different DMRS ports.
  • Different DMRS ports are orthogonal ports means that the DMRS corresponding to different DMRS ports are orthogonal in the frequency domain, time frequency or code domain.
  • DMRS can occupy at least 1 OFDM symbol in the time domain, and the bandwidth occupied in the frequency domain is the same as the scheduling bandwidth of the scheduled data signal.
  • Multiple DMRS symbols corresponding to one port correspond to one reference signal sequence, and one reference signal sequence includes multiple reference signal sequence elements.
  • the DMRS sequence corresponding to a port can be mapped to the corresponding time-frequency resource after being multiplied by the corresponding mask sequence through the preset time-frequency resource mapping rules.
  • the m-th reference sequence element r(m) in the corresponding DMRS sequence can be mapped to the resource element (resource element, RE) with index (k, l) p, ⁇ according to the following rules.
  • the RE with index (k, l) p, ⁇ can correspond to the OFDM symbol with index l in a time slot in the time domain, and correspond to the subcarrier with index k in the frequency domain.
  • p is the index of the DMRS port
  • ⁇ is the subcarrier spacing parameter
  • w t (l′) is the time domain mask element corresponding to the OFDM symbol with index l'
  • w f (k′) is the frequency domain mask element corresponding to the subcarrier with index k'
  • m 2n+k′
  • ⁇ is the subcarrier offset factor
  • the value of m is related to the configuration type.
  • Type 1 DMRS The resource mapping of Type 1 DMRS and Type 2 DMRS are introduced below.
  • the values of w f (k′), w t (l′) and ⁇ corresponding to DMRS port p can be determined according to Table 1.
  • ⁇ is the index of the code division multiplexing (CDM) group (also called an orthogonal multiplexing group) to which port p belongs.
  • CDM code division multiplexing
  • CDM group 0 includes port 0 and port 1
  • CDM group 1 includes port 2 and port 3.
  • CDM Group 0 and CDM Group 1 are frequency division multiplexed (that is, mapped on different frequency domain resources).
  • the DMRS ports included in the CDM group are mapped to the same time-frequency resources.
  • the reference signal sequences corresponding to the DMRS ports included in the CDM group are distinguished by mask sequences, thereby ensuring the orthogonality of the DMRS ports in the CDM group and thus suppressing interference between DMRS transmitted on different antenna ports.
  • port 0 and port 1 are located in the same RE, and resource mapping is performed in the frequency domain in a comb-tooth manner. That is, the adjacent frequency domain resources occupied by port 0 and port 1 are separated by one subcarrier.
  • the two adjacent REs occupied correspond to a mask sequence of length 2.
  • port 0 and port 1 use a set of mask sequences of length 2 (+1+1 and +1-1).
  • port 2 and port 3 are in phase Within the same RE, the REs that are not occupied by port 0 and port 1 are mapped in the frequency domain in a comb-tooth manner.
  • ports 2 and 3 use a set of mask sequences of length 2 (+1+1 and +1-1).
  • p in this application form is the port index
  • the port with port index 1000 can be port 0
  • the port with port index 1001 can be port 1
  • the port with port index 100X can be port X.
  • the 8 DMRS ports are divided into 2 CDM groups, where CDM group 0 includes port 0, port 1, port 4 and port 5; CDM group 1 includes port 2, port 3, port 6 and port 7.
  • CDM Group 0 and CDM Group 1 are frequency division multiplexed.
  • the DMRS ports included in the CDM group are mapped to the same time-frequency resources.
  • the reference signal sequences corresponding to the DMRS ports included in the CDM group are distinguished by mask sequences.
  • port 0, port 1, port 4 and port 5 are located in the same RE, and resource mapping is performed in the frequency domain in a comb-tooth manner, that is, the adjacent frequencies occupied by port 0, port 1, port 4 and port 5 are Domain resources are spaced one subcarrier apart.
  • the occupied two adjacent subcarriers and two OFDM symbols correspond to a mask sequence of length 4.
  • subcarrier 0 and subcarrier 2 corresponding to OFDM symbol 1 and OFDM symbol 2 port 0, port 1, port 4 and port 5 use a set of mask sequences with a length of 4 (+1+1+1+1/ +1+1-1-1/+1-1+1-1/+1-1-1+1).
  • port 2, port 3, port 6 and port 7 are located in the same RE and are mapped to the unoccupied subcarriers of port 0, port 1, port 4 and port 5 in a comb-tooth manner in the frequency domain.
  • port 2, port 3, port 6 and port 7 use a set of mask sequences with a length of 4 (+1+1+1+1/+1 +1-1-1/+1-1+1-1/+1-1-1+1).
  • w f (k′), w t (l′) and ⁇ corresponding to DMRS port p in the Type 2 DMRS mapping rule can be determined according to Table 2.
  • ⁇ is the index of the CDM group (which can also be called an orthogonal multiplexing group) to which port p belongs.
  • DMRS ports in the same CDM group occupy the same time-frequency resources.
  • DMRS For single-symbol DMRS, a maximum of 6 ports are supported, and the DMRS resource occupies one OFDM symbol.
  • the 6 DMRS ports are divided into 3 CDM groups, where CDM group 0 includes port 0 and port 1; CDM group 1 includes port 2 and port 3; CDM group 2 includes port 4 and port 5.
  • Frequency division multiplexing is used between CDM groups, and the DMRS corresponding to the DMRS ports included in the CDM group are mapped on the same time-frequency resources.
  • the reference signal sequences corresponding to the DMRS ports included in the CDM group are distinguished by mask sequences.
  • For a DMRS port its corresponding DMRS reference signal is The domain is mapped in multiple resource sub-blocks containing two consecutive sub-carriers, and adjacent resource sub-blocks are separated by four sub-carriers in the frequency domain.
  • port 0 and port 1 are located in the same RE, and resource mapping is performed in the frequency domain in a comb-tooth manner.
  • resource mapping is performed in the frequency domain in a comb-tooth manner.
  • port 0 and port 1 occupy subcarrier 0, subcarrier 1, subcarrier 6 and subcarrier 7.
  • Port 2 and port 3 occupy subcarrier 2, subcarrier 3, subcarrier 8 and subcarrier 9.
  • Port 4 and port 5 occupy subcarrier 4, subcarrier 5, subcarrier 10 and subcarrier 11.
  • the two DMRS ports included in a CDM group they correspond to a mask sequence of length 2 (+1+1 and +1-1) in two adjacent subcarriers.
  • DMRS resources occupy two OFDM symbols.
  • the 12 DMRS ports are divided into 3 CDM groups, where CDM group 0 includes port 0, port 1, port 6 and port 7; CDM group 1 includes port 2, port 3, port 8 and port 9; CDM group 2 includes port 4 , port 5, port 10 and port 11.
  • Frequency division multiplexing is used between CDM groups, and the DMRS corresponding to the DMRS ports included in the CDM group are mapped on the same time-frequency resources.
  • the reference signal sequences corresponding to the DMRS ports included in the CDM group are distinguished by mask sequences. For a DMRS port, its corresponding DMRS reference signal is mapped in multiple resource sub-blocks containing two consecutive sub-carriers in the frequency domain, and adjacent resource sub-blocks are separated by four sub-carriers in the frequency domain.
  • port 0, port 1, port 6 and port 7 are located in the same RE, and resource mapping is performed in the frequency domain in a comb-tooth manner.
  • resource mapping is performed in the frequency domain in a comb-tooth manner.
  • port 0, port 1, port 6 and port 7 occupy subcarrier 0, subcarrier 1, subcarrier 6 and subcarrier 7 corresponding to OFDM symbol 1 and OFDM symbol 2.
  • Port 2, port 3, port 8 and port 9 occupy subcarrier 2, subcarrier 3, subcarrier 8 and subcarrier 9 corresponding to OFDM symbol 1 and OFDM symbol 2.
  • Port 4, port 5, port 10 and port 11 occupy subcarrier 4, subcarrier 5, subcarrier 10 and subcarrier 11 corresponding to OFDM symbol 1 and OFDM symbol 2.
  • the corresponding mask sequence of length 4 (+1+1+1+1/+1+1- 1-1/+1-1+1-1/+1-1-1+1).
  • p in this application form is the port index
  • the port with port index 1000 can be port 0
  • the port with port index 1001 can be port 1
  • the port with port index 100X can be port X.
  • DMRS in NR can support up to 6 DMRS ports, thus supporting up to 6 streams of MIMO transmission.
  • the number of terminal devices further increases, placing higher demands on the number of MIMO transmission streams.
  • the number of transmitting and receiving antennas will further increase (for example, the number of transmitting antennas of network equipment supports 128T or 256T, and the number of receiving antennas of terminals is 8R).
  • the acquisition of channel information will be more accurate and can further support higher
  • the number of transmission streams is used to improve the spectral efficiency of the MIMO system. This will inevitably require more DMRS ports to support a higher number of transmission streams (greater than 6 streams).
  • One possible method to expand the number of existing orthogonal DMRS ports is to increase the time-frequency resources occupied by DMRS. This method can ensure that the number of resources occupied by DMRS symbols corresponding to each DMRS port remains unchanged. However, as the number of ports increases, the number of resources required by the DMRS ports will also increase, requiring more time-frequency resources and increasing DMRS overhead. Moreover, the increase in DMRS overhead will also reduce the spectrum efficiency of the system.
  • Another possible method is to multiplex DMRS symbols corresponding to more non-orthogonal DMRS ports while ensuring the same time-frequency resources (overhead).
  • a low cross-correlation DMRS sequence corresponding to the newly added DMRS is designed.
  • the sequence corresponding to the new DMRS port and the sequence corresponding to the existing DMRS port ensure low cross-correlation.
  • the superposition of non-orthogonal ports will inevitably cause certain interference, leading to loss of system performance (for example, channel estimation capability).
  • additional DMRS is introduced below.
  • the NR standard introduces an additional DMRS configuration type to track channel changes and reduce the impact of residual frequency offset and phase noise on channel estimation capabilities.
  • the DMRS configuration shown in Figures 4 and 5 can be called front-loaded DMRS (front-loaded DMRS) configuration.
  • Figure 6A shows a configuration pattern of additional DMRS.
  • This additional DMRS corresponds to the Type 1 DMRS shown on the left side of Figure 4.
  • multiple symbols for transmitting DMRS can be configured in the same time slot.
  • the DMRS pattern on each symbol is the same as the DMRS pattern shown on the left in Figure 4.
  • the DMRS pattern shown in the left picture in FIG. 4 may be a special example of the pattern shown in FIG. 6A including only symbol 2 (which may also be called the second symbol).
  • Figure 6B shows another configuration pattern of additional DMRS.
  • This additional DMRS corresponds to the Type 2 DMRS shown on the left side of Figure 5.
  • multiple symbols for transmitting DMRS can be configured in the same time slot.
  • the DMRS pattern on each symbol is the same as the DMRS pattern shown on the left in Figure 5.
  • the DMRS pattern shown in the left picture in FIG. 5 may be a special example of the pattern shown in FIG. 6B including only symbol 2 (which may also be called the second symbol).
  • Figures 6A and 6B only take the correspondence between additional DMRS and single-symbol DMRS as an example for illustration. It should be understood that additional DMRS may also correspond to the dual-symbol DMRS in Figure 4 or Figure 5.
  • additional DMRS may also correspond to the dual-symbol DMRS in Figure 4 or Figure 5.
  • the patterns of symbols 2 and 3 are the same as the DMRS patterns of dual-symbol DMRS in Figure 4
  • the patterns of symbols 10 and 11 are also the same as the DMRS patterns of dual-symbol DMRS in Figure 4.
  • the patterns of symbols 2 and 3 are the same as the DMRS patterns of the dual-symbol DMRS in Figure 5, and the patterns of symbols 10 and 11 are also the same as the DMRS patterns of the dual-symbol DMRS in Figure 5.
  • the DMRS sequence corresponding to a port can be mapped to the corresponding time-frequency resource after multiplying it with the corresponding mask sequence through the preset time-frequency resource mapping rules.
  • the m-th reference sequence element r(m) in the corresponding DMRS sequence can be mapped to the resource element (resource element, RE) with index (k, l) p, ⁇ according to the following rules.
  • the RE with index (k, l) p, ⁇ can correspond to the OFDM symbol with index l in a time slot in the time domain, and correspond to the subcarrier with index k in the frequency domain.
  • l d is the number of continuous symbols of PDSCH; it is the leading DMRS position, which can also be called the starting OFDM symbol position occupied by DMRS in the leading DMRS configuration.
  • the value of l0 is 2; for pos3, the value of l0 is 3.
  • pos0 indicates that one symbol can transmit DMRS
  • pos1 indicates that two symbols can transmit DMRS
  • pos2 indicates that three symbols can transmit DMRS
  • pos3 indicates that four symbols can transmit DMRS.
  • Table 3 when l d is 10, for pos1 in PDSCH mapping type A, The values of can be l0 and l 0 +9; DMRS can be transmitted on symbol l0 and symbol l 0 +9.
  • the symbols occupied by DMRS in the front-loaded DMRS configuration are front-loaded symbols; in the additional DMRS configuration pattern, the symbols used to transmit DMRS except the front-loaded DMRS symbols are additional DMRS symbols.
  • additional DMR is not used to increase the number of DMRS ports, but only repeatedly transmits DMRS through different OFDM symbols to ensure channel estimation capabilities in high-speed mobile situations (for example, the speed of the terminal device is greater than the set speed threshold).
  • the embodiment of the present application provides a communication method, which is applied in the communication system shown in Figure 1 and is executed by a network device or a terminal device. Referring to the flow chart shown in Figure 7, the flow of this method will be described in detail below.
  • the sending device may be a network device and the receiving device may be a terminal device; or the sending device may be a terminal device and the receiving device may be a network device.
  • the reference signal includes but is not limited to DMRS. In the following description, the reference signal is DMRS as an example. DMRS can be replaced with other types of reference signals according to actual requirements.
  • the communication method provided by the embodiment of the present application may include the following steps:
  • the sending device obtains the reference signal corresponding to the first port.
  • the first port belongs to the first port set or the second port set.
  • the ports in the first port set may be existing ports, for example, port 0 and port 1 in Figure 4.
  • the ports in the second port set may be newly added ports.
  • the first port set and the second port set are different CDM groups.
  • the first port set may be CDM Group 0 or CDM Group 1; for single-symbol Type 2 DMRS, the first port set may be CDM Group 0, CDM Group 1, or CDM Group 2.
  • the second port set may be CDM group 3 or CDM group 4 or CDM group 5.
  • CDM group 3 can include port 8 and port 9
  • CDM group 4 can include port 10 and port 11
  • CDM group 3 can include port 12 and port 13
  • CDM group 4 Port 14 and port 15 may be included
  • CDM group 5 may include port 16 and port 17.
  • the sending device sends the reference signal corresponding to the first port through the first resource and the second resource.
  • the receiving device receives the reference signal corresponding to the first port through the first resource and the second resource.
  • the first resource may be located in the first OFDM symbol
  • the second resource may be located in the second OFDM symbol
  • the first OFDM symbol and the second OFDM symbol are not adjacent.
  • the first resource and the second resource are not adjacent in the time domain.
  • the first resource and the second resource are respectively located at symbol 2 and symbol 11 in the same time slot.
  • the first resources are RE1 and RE3 in symbol 2
  • the second resources are RE1 and RE3 in symbol 11.
  • the reference signal corresponding to the port in the first port set may correspond to the first mask on the first resource and the second resource
  • the reference signal corresponding to the port in the second port set may be on the first resource and the second resource.
  • the above corresponds to the second mask, and the first mask and the second mask are different. That is to say, the ports in the first port set can be multiplexed on the same time-frequency resources as the ports in the second port set through time division orthogonal cover code (TD-OCC).
  • TD-OCC time division orthogonal cover code
  • the sending device can transmit the reference signal through the resources on multiple non-adjacent OFDM symbols; and the reference signal corresponding to the port in the first port set on the multiple OFDM symbols corresponds to the first mask,
  • the resources of the reference signals corresponding to the ports in the first port set on the multiple OFDM symbols correspond to the second mask.
  • the first mask and the second mask are different, so that the number of ports can be expanded through multiple non-adjacent OFDM symbols. , which can support more transmission streams.
  • the first OFDM symbol is a preamble DMRS symbol
  • the second OFDM symbol The symbols are additional DMRS symbols.
  • the prefixed DMRS symbols and additional DMRS symbols please refer to Case 1 to Case 4 below, which will not be elaborated here.
  • This method increases the number of DMRS ports by using existing additional DMRS symbols, thereby increasing the number of DMRS ports and supporting more transmission streams while occupying additional resources. Moreover, through this method, the existing DMRS port configuration is slightly changed without losing the performance of channel estimation.
  • the ports in the first port set can be multiplexed on the same time-frequency resource as the ports in the second port set added due to additional DMRS symbols through TD-OCC, for additional DMRS, it is possible to Flexibly support more multiplexing methods through port configuration, such as repeated transmission of DMRS or distinguishing the DMRS of ports through TD-OCC.
  • the above method further includes:
  • the network device sends the first instruction information to the terminal device.
  • the terminal device receives the first indication information from the network device.
  • the first indication information may be used to instruct the reference signal corresponding to the first port to be sent in the first manner.
  • the first way is to send the reference signal of the first port through the first resource and the second resource, that is, to send the reference signal of the first port through S702.
  • the first indication information may be sent through a message (for example, an RRC message), or may be carried in control information (for example, downlink control information (DCI)).
  • a message for example, an RRC message
  • control information for example, downlink control information (DCI)
  • the first indication information may directly instruct the reference signal corresponding to the first port to be sent in the first manner.
  • the first indication information when the first indication information is a first value, it may be instructed to send the reference signal corresponding to the first port in the first manner.
  • the first indication information may also indirectly instruct the reference signal corresponding to the first port to be sent in the first manner.
  • the first indication information includes a first port index, and the first port index is used to indicate the first mode; for example, when the reference signal of port H is dedicated to transmission through the first mode, the port index of port H may be the first Port index, where H is a non-negative integer.
  • the network device may determine that the reference signal of the first port needs to be sent in the first manner, and send the first indication information to the terminal device.
  • the moving speed of the terminal device is lower than the first speed threshold.
  • the network device can obtain the timing advance (time advance, TA) and direction of arrival (angle of arrival, AoA) of the terminal device at time 1 and time 2.
  • TA time advance
  • AoA direction of arrival
  • the network device can determine the distance of the terminal device relative to the AN device; through the AoA, the network device can determine the direction of the terminal device relative to the AN device. Therefore, the network device can determine the location 1 of the terminal device at time 1 and the location 2 at time 2. Then, the network device may determine that the moving speed of the terminal device is (position 2 - position 1)/(time 2 - time 1). The network device can then determine whether condition 1 is met.
  • Condition 2 The change in channel quality of the terminal device is less than the first channel quality threshold.
  • the network device may estimate the channel of the terminal device to determine the channel quality 1 of the terminal device at time 3 and the channel quality 2 at time 4, when the difference between channel quality 2 and channel quality 1 is less than the first channel quality threshold. , the network device can determine whether condition 2 is met.
  • Condition 3 The resources used to transmit DMRS are located in edge subbands. For example, the network device may determine whether condition 3 is met based on the interpretation of the edge subband.
  • the total number of ports required by the terminal equipment is greater than the number of ports currently supported by NR.
  • the total number of ports required is also greater than 8, thus exceeding The number of ports currently supported by NR meets condition 4.
  • the total number of ports required is also greater than 12, thus exceeding the number of ports that NR can currently support and satisfying condition 4.
  • the terminal device can transmit the reference signal corresponding to the first port in the first manner under the instruction of the network device.
  • the network device can flexibly configure the way the terminal device sends the reference signal (which can also be called the DMRS port multiplexing mode), thereby adapting to the DMRS channel estimation capability in different scenarios.
  • the above method further includes step P1-step P2:
  • the network device sends the second instruction information to the terminal device.
  • the terminal device receives the second indication information from the network device.
  • the second indication information may be used to instruct the terminal device to send the reference signal corresponding to the first port in the second manner.
  • the second method is: the terminal device sends the reference signal of the first port through the third resource and the fourth resource.
  • the third resource and the fourth resource are located on different frequency domain resources.
  • the third resource is RE1 and RE3 in symbol 2
  • the fourth resource is RE5 and RE7 in symbol 2.
  • the reference signals corresponding to the ports in the first port set may correspond to the third mask on the third resource and the fourth resource
  • the reference signals corresponding to the ports in the second port set may be on the third resource and the fourth resource.
  • the third mask and the fourth mask are different. For specific content, please refer to Method A2 below and will not be expanded upon here.
  • the second indication information may be sent through a message (for example, an RRC message), or may be carried in control information (for example, DCI).
  • the second indication information may directly instruct the reference signal corresponding to the first port to be sent in the second manner.
  • the second indication information when the second indication information is the second value, it may be instructed to send the reference signal corresponding to the first port in the second manner.
  • the second indication information may also indirectly instruct the reference signal corresponding to the first port to be sent in the second manner.
  • the second indication information includes a second port index, and the second port index is used to indicate the second mode; for example, when the reference signal of port I is dedicated to transmission through the second mode, the port index of port I may be the second mode.
  • Port index where I is a non-negative integer.
  • the network device may determine that a second method is required to send the reference signal of the first port, and send the second indication information to the terminal device.
  • Condition 1 The moving speed of the terminal device is greater than the second speed threshold.
  • the network device can obtain the moving speed of the terminal device in a manner similar to condition 1 to determine whether condition 1 is met.
  • Condition 2 The channel delay spread of the terminal device is less than the delay spread threshold.
  • the network device can obtain the channel delay spread of the terminal device through channel estimation to determine whether condition 2 is met.
  • Condition 3 The resources used to transmit DMRS are located in non-edge subbands. For example, the network device may determine whether condition three is met based on the interpretation of the edge subband.
  • Condition 4 The total number of ports required by the terminal equipment is greater than the number of ports currently supported by NR. For specific content, please refer to Condition 4 above and will not be repeated here.
  • the terminal device sends the reference signal corresponding to the first port through the third resource and the fourth resource.
  • the network device receives the reference signal corresponding to the first port through the third resource and the fourth resource.
  • the terminal device can use the second method to transmit the reference signal corresponding to the first port under the instruction of the network device.
  • the network device can flexibly configure the way the terminal device sends the reference signal, thereby adapting to the DMRS channel estimation capabilities in different scenarios.
  • the above method further includes step Q1-step Q2:
  • the network device sends the third instruction information to the terminal device.
  • the terminal device receives the third indication information from the network device.
  • the third indication information is used to instruct the reference signal corresponding to the first port to be sent in a third manner.
  • the third method is: when the first port belongs to the first port set, send the reference signal corresponding to the first port through the fifth resource; when the first port belongs to the second port set, send the first port through the sixth resource corresponding reference signal.
  • the fifth resource and the sixth resource are located on different frequency domain resources; for example, the fifth resource is RE1 and RE5 in symbol 2, and the sixth resource is RE3 and RE7 in symbol 2.
  • Method A5 for specific content, please refer to Method A5 below and will not be expanded upon here.
  • the third indication information may be sent through a message (for example, an RRC message), or may be carried in control information (for example, DCI).
  • the third indication information may directly instruct the reference signal corresponding to the first port to be sent in a third manner.
  • the third indication information when the third indication information is a third value, it may be instructed to send the reference signal corresponding to the first port in a third manner.
  • the third indication information may also indirectly instruct the reference signal corresponding to the first port to be sent in a third manner.
  • the third indication information includes a third port index, and the third port index is used to indicate the third mode; for example, when the reference signal of port Z is dedicated to transmission through the third mode, the port index of port Z may be the third mode.
  • Port index where Z is a non-negative integer.
  • the network device may determine that a third method is required to send the reference signal of the first port, and send the third indication information to the terminal device.
  • the terminal device sends the reference signal corresponding to the first port through the fifth resource or the sixth resource.
  • the network device receives the reference signal corresponding to the first port through the fifth resource or the sixth resource.
  • the terminal device can use a third method to transmit the reference signal corresponding to the first port under the instruction of the network device.
  • the network device can flexibly configure the way the terminal device sends the reference signal, thereby adapting to the DMRS channel estimation capabilities in different scenarios.
  • O1, P1-P2 and Q1-Q2 can be used in combination.
  • the network device may instruct the terminal device to send the reference signal corresponding to the first port through the first method and the second method.
  • the masks corresponding to the reference signals corresponding to the first port on each resource can refer to the methods A3, B2, C2 and D2 below, which will not be elaborated here.
  • the network device may determine to send the reference signal corresponding to the first port through the first method and the second method. For example, when the resource used for transmitting DMRS is located in an edge subband, the network device may determine to send the reference signal corresponding to the first port through the first manner and the second manner.
  • the network device when O1 is combined with Q1-Q2, the network device can instruct the terminal device to send the reference signal corresponding to the first port through the first method and the third method; at this time, the reference signal corresponding to the first port corresponds to each resource.
  • the mask can refer to the method A4 below, which will not be expanded here.
  • the network device may determine to send the reference signal corresponding to the first port through the first method and the third method.
  • the elements in the sequence of the reference signal corresponding to the first port correspond to the RE in the first resource one-to-one, and the elements in the sequence of the reference signal corresponding to the first port correspond to the RE in the first resource.
  • the REs in the two resources have one-to-one correspondence.
  • the number of elements included in the sequence of the reference signal corresponding to the first port may be one of the following: 2, 4, 6, 8, 12.
  • the sequence of reference signal 1 corresponding to port 0 includes two elements, namely element 1 and element 2.
  • the first resource is RE1 and RE3 in symbol 2
  • the second resource is RE1 and RE3 in symbol 11.
  • Element 1 and element 2 can be respectively mapped to RE1 and RE3 in symbol 2
  • element 1 and element 2 can be mapped to RE1 and RE3 in symbol 11 respectively.
  • the sequence of reference signal 2 corresponding to port 8 includes two elements, namely element 3 and element 4.
  • Element 3 and element 4 may be respectively mapped to RE1 and RE3 in symbol 2
  • element 3 and element 4 may be respectively mapped to RE1 and RE3 in symbol 11.
  • the reference signal 1 corresponds to the mask ⁇ +1,+1 ⁇ (i.e., the first mask) on the first resource and the second resource respectively, and the reference signal 2 corresponds to the mask ⁇ +1 on the first resource and the second resource respectively.
  • ⁇ +1,+1 ⁇ i.e., the first mask
  • the reference signal 2 corresponds to the mask ⁇ +1 on the first resource and the second resource respectively.
  • ,-1 ⁇ i.e. the second mask).
  • the reference signals corresponding to the ports in the first port set and the second port set can be repeatedly mapped to the first resource and the second resource, and the reference signals corresponding to the ports in the first port set are in the multiple OFDM symbols.
  • the resources on the multiple OFDM symbols correspond to the first mask
  • the resources of the reference signals corresponding to the ports in the first port set on the multiple OFDM symbols correspond to the second mask.
  • the first mask and the second mask are different, so that different channels can be used. Multiple adjacent OFDM symbols expand the number of ports, thereby supporting more transmission streams.
  • This application can differentiate the DMRS corresponding to the port according to different DMRS configuration types and number of symbols, thereby expanding the number of ports.
  • the following describes how to distinguish the DMRS corresponding to the port for cases 1 to 4 respectively.
  • Case 1 Add an additional set of DMRS symbols to the front-loaded single symbol Type 1 DMRS.
  • Figure 8 shows the time-frequency resource mapping method in case 1.
  • 4 new ports can be added; the port index of the new 4 ports can be 8-11.
  • the DMRS corresponding to the existing port and the DMRS corresponding to the new port can be mapped to the RE corresponding to symbol 2 (i.e., front-loaded symbol) and symbol 11 (i.e., additional DMRS symbol).
  • the following takes port 0, port 1, port 8, and port 9 as examples to explain how to distinguish the DMRS corresponding to the ports.
  • the first port set includes port 0 and port 1
  • the second port set includes port 8 and port 9.
  • the DMRS corresponding to the first port set and the DMRS corresponding to the second port set may be transmitted through the same resource.
  • the DMRS corresponding to the port can be distinguished in one of the following ways.
  • Method A1 Use TD-OCC to distinguish the DMRS corresponding to the port.
  • the ports in the first port set and the ports in the second port set correspond to different time domain OCCs, so that the DMRS corresponding to the ports in the first port set and the DMRS corresponding to the ports in the second port set can be distinguished .
  • the ports in the first port set correspond to different frequency domain OCCs
  • the ports in the second port set correspond to different frequency domain OCCs, so that DMRS corresponding to different ports can be distinguished within the first port set and the second port set.
  • Table 5A shows an example of the mask elements corresponding to the DMRS sequences corresponding to each port on each resource in mode A1.
  • the corresponding DMRS sequences do not change, and symbol 2 and symbol 11 correspond to the time domain OCC ⁇ +1, +1 ⁇ respectively;
  • the corresponding DMRS sequence on symbol 2 is the same as the existing port 0, and corresponds to the time domain OCC ⁇ +1, -1 ⁇ on symbol 2 and symbol 11 respectively;
  • its corresponding DMRS sequence is at Symbol 2 is the same as the existing port 1
  • symbol 2 and symbol 11 correspond to time domain OCC ⁇ +1, -1 ⁇ respectively.
  • the DMRS corresponding to the newly added port and the DMRS corresponding to the existing port can be distinguished through 2-long time domain OCC to achieve code domain orthogonality.
  • the DMRS corresponding to the ports can also be distinguished in a similar manner to port 0, port 1, port 8, and port 9.
  • the mask elements corresponding to the DMRS sequences corresponding to each port on each resource can be as shown in Table 5B.
  • code division orthogonality can be achieved through TD-OCC on different time domain symbols to distinguish the DMRS corresponding to different ports, thereby combining multiple symbols in the time domain to expand the DMRS port capacity, that is, increasing the number of DMRS ports. quantity.
  • Method A2 Distinguish the DMRS corresponding to the port through frequency division orthogonal cover code (FD-OCC).
  • FD-OCC frequency division orthogonal cover code
  • the ports in the first port set and the ports in the second port set correspond to different frequency domain OCCs, so that the DMRS corresponding to the ports in the first port set and the DMRS corresponding to the ports in the second port set can be distinguished .
  • the ports in the first port set correspond to different frequency domain OCCs
  • the ports in the second port set correspond to different frequency domain OCCs, so that DMRS corresponding to different ports can be distinguished within the first port set and the second port set.
  • Table 6A shows one of the mask elements corresponding to the DMRS sequence corresponding to each port on each resource in mode A2.
  • the existing port 0 corresponds to frequency domain OCC ⁇ +1, +1, +1, on subcarrier 1, subcarrier 3, subcarrier 5 and subcarrier 7 respectively.
  • the existing port 1 corresponds to frequency domain OCC ⁇ +1,-1,+1,-1 ⁇ on subcarrier 1, subcarrier 3, subcarrier 5 and subcarrier 7 respectively
  • the new port 8 is on Subcarrier 1, subcarrier 3, subcarrier 5 and subcarrier 7 correspond to frequency domain OCC ⁇ +1,+1,-1,-1 ⁇ respectively
  • the newly added port 9 is on subcarrier 1, subcarrier 3 and subcarrier 7.
  • subcarrier 7 correspond to frequency domain OCC ⁇ +1,-1,-1,+1 ⁇ respectively.
  • the DMRS corresponding to the newly added port and the DMRS corresponding to the existing port can be distinguished through the 4-length frequency domain OCC to achieve code domain orthogonality.
  • the DMRS corresponding to the ports can also be distinguished in a similar manner to port 0, port 1, port 8 and port 9.
  • the mask elements corresponding to the DMRS sequences corresponding to each port on each resource can be as shown in Table 6B.
  • code division orthogonality can be achieved through FD-OCC on different frequency domain resources to distinguish DMRS corresponding to different ports, thereby increasing the number of DMRS ports.
  • Method A3 Use FD-OCC and TD-OCC to distinguish the DMRS corresponding to the port.
  • the ports in the first port set and the ports in the second port set correspond to different time domain OCCs
  • the ports in the first port set and the ports in the second port set correspond to different frequency domain OCCs.
  • the ports in the first port set correspond to different frequency domain OCCs
  • the ports in the second port set correspond to different frequency domain OCCs, so that DMRS corresponding to different ports can be distinguished within the first port set and the second port set.
  • Table 7A shows an example of the mask elements corresponding to the DMRS sequences corresponding to each port on each resource in mode A3.
  • the existing port 0 corresponds to frequency domain OCC ⁇ +1,+1,+1,+1 ⁇ on subcarrier 1, subcarrier 3, subcarrier 5 and subcarrier 7 respectively.
  • the existing port 1 corresponds to frequency domain OCC ⁇ +1,-1,+1,-1 ⁇ on subcarrier 1, subcarrier 3, subcarrier 5 and subcarrier 7 respectively;
  • the new port 8 is on subcarrier 1 , subcarrier 3, subcarrier 5 and subcarrier 7 respectively correspond to frequency domain OCC ⁇ +1,+1,-1,-1 ⁇ ;
  • the newly added port 9 is on subcarrier 1, subcarrier 3, subcarrier 5 and subcarrier 7 respectively correspond to frequency domain OCC ⁇ +1,-1,-1,+1 ⁇ .
  • the newly added port 8 corresponds to the time domain OCC ⁇ +1,-1 ⁇ on symbols 2 and 11 respectively;
  • the newly added port 9 corresponds to the time domain OCC ⁇ +1,-1 ⁇ on symbols 2 and 11 respectively.
  • the DMRS corresponding to the newly added port and the DMRS corresponding to the existing port can be distinguished through the 2-length time domain OCC and the 4-length frequency domain OCC to achieve code domain orthogonality.
  • the DMRS corresponding to the ports can also be distinguished in a similar manner to port 0, port 1, port 8 and port 9.
  • the mask elements corresponding to the DMRS sequences corresponding to each port on each resource can be as shown in Table 7B.
  • frequency domain OCC and time domain OCC can be combined to distinguish the DMRS corresponding to the new port and the DMRS corresponding to the existing port, thereby increasing the number of DMRS ports and enhancing the interference suppression between the new port and the existing port.
  • Method A4 Differentiate the DMRS corresponding to the port through frequency division cyclic shift (FD-CS) and TD-OCC.
  • FD-CS frequency division cyclic shift
  • TD-OCC time division cyclic shift
  • the ports in the first port set and the ports in the second port set correspond to different time domain OCCs
  • the mask sequences corresponding to the ports in the first port set and the ports in the second port set are Orthogonal, so that the DMRS corresponding to the ports in the first port set and the DMRS corresponding to the ports in the second port set can be distinguished.
  • the ports in the first port set correspond to different frequency domain OCCs
  • the ports in the second port set correspond to different frequency domain OCCs, so that DMRS corresponding to different ports can be distinguished within the first port set and the second port set.
  • Table 8A shows an example of the mask elements corresponding to the DMRS sequences corresponding to each port on each resource in mode A4.
  • the existing port 0 corresponds to the frequency domain mask elements ⁇ +1,+1,+1,+ on subcarrier 1, subcarrier 3, subcarrier 5 and subcarrier 7 respectively. 1 ⁇ ;
  • the existing port 1 corresponds to the frequency domain mask elements ⁇ +1,-1,+1,-1 ⁇ on subcarrier 1, subcarrier 3, subcarrier 5 and subcarrier 7 respectively;
  • the new port 8 Subcarrier 1, subcarrier 3, subcarrier 5 and subcarrier 7 correspond to frequency domain mask elements ⁇ +1,+j,-1,-j ⁇ respectively;
  • the new port 9 is on subcarrier 1, subcarrier 3 , subcarrier 5 and subcarrier 7 respectively correspond to frequency domain mask elements ⁇ +1,-j,-1,+j ⁇ .
  • the newly added port 8 corresponds to the time domain OCC ⁇ +1,-1 ⁇ on symbols 2 and 11 respectively;
  • the newly added port 9 corresponds to the time domain OCC ⁇ +1,-1 ⁇ on symbols 2 and 11 respectively.
  • the DMRS corresponding to the newly added port and the DMRS corresponding to the existing port can be distinguished through the 4-long frequency domain mask sequence and the 2-long time domain OCC to achieve code domain orthogonality.
  • port 3 port 10 and port 11
  • the same method as port 0, port 1, Port 8 and port 9 distinguish the DMRS corresponding to the port in a similar manner.
  • the mask elements corresponding to the DMRS sequences corresponding to each port on each resource can be as shown in Table 8B.
  • the frequency domain mask sequence and the time domain OCC can be combined to distinguish the DMRS corresponding to the new port and the DMRS corresponding to the existing port, thereby increasing the number of DMRS ports while enhancing the communication between the new port and the existing port. Interference suppression capability, improved channel estimation performance, and greater multi-user (MU) pairing gain.
  • MU multi-user
  • Method A5 Use FDM to distinguish the DMRS corresponding to the port.
  • the ports in the first port set and the ports in the second port set correspond to subcarriers in different frequency domains, so that the DMRS corresponding to the ports in the first port set and the corresponding ports in the second port set can be distinguished DMRS.
  • the ports in the first port set correspond to different frequency domain OCCs
  • the ports in the second port set correspond to different frequency domain OCCs, so that DMRS corresponding to different ports can be distinguished within the first port set and the second port set.
  • Table 9A shows an example of the mask elements corresponding to the DMRS sequences corresponding to each port on each resource in mode A5.
  • the DMRS corresponding to the existing ports 0 and 1 can be mapped to subcarrier 1 and subcarrier 5, and the DMRS corresponding to the newly added ports 8 and 9 can be mapped to subcarrier 3 and subcarrier 7. .
  • the DMRS corresponding to the newly added port can be frequency division multiplexed with the DMRS corresponding to the existing port to achieve frequency domain orthogonality.
  • port 2 for port 2, port 3, port 10, and port 11, a similar method to port 0, port 1, port 8, and port 9 can be used to distinguish the DMRS corresponding to the ports.
  • the mask elements corresponding to the DMRS sequences corresponding to each port on each resource can be as shown in Table 9B.
  • DMRS corresponding to different ports can be distinguished through frequency division on different frequency domain resources, thereby increasing the number of DMRS ports.
  • Case 2 Add an additional set of DMRS symbols to the front-loaded dual symbol Type 1 DMRS.
  • Figure 9 shows the time-frequency resource mapping method in case 2.
  • 8 new ports can be added; the port index of the new 8 ports can be 8-15.
  • Both existing ports and new ports can be mapped to REs corresponding to symbol 2, symbol 3, symbol 10, and symbol 11; among them, symbol 2 and symbol 3 are front-loaded symbols, and symbol 10 and symbol 11 are additional DMRS symbols.
  • the following takes port 0, port 1, port 4, port 5, port 8, port 9, port 12 and port 13 as examples to explain how to distinguish the DMRS corresponding to the ports.
  • the first port set includes port 0, port 1, port 4, and port 5, and the second port set includes port 8, port 9, port 12, and port 13.
  • the DMRS corresponding to the first port set and the DMRS corresponding to the second port set may be transmitted through the same resource.
  • the DMRS corresponding to the port can be distinguished in a manner similar to any of the above-mentioned methods A1 to A5. Some of the methods will be described in detail below.
  • Method B1 Use TD-OCC to distinguish the DMRS corresponding to the port.
  • This method B1 is similar to the above-mentioned method A1.
  • the ports in the first port set and the ports in the second port set correspond to different time domain OCCs.
  • the corresponding DMRS sequences do not change, and the front-loaded symbols and additional DMRS symbols correspond to the time domain OCC ⁇ +1,+1 ⁇ respectively;
  • the corresponding DMRS sequences of the newly added port 8 port 9, port 12 and port 13 are the same as the existing ports 0, port 1, port 4 and port 5 respectively in the front-loaded symbols.
  • the DMRS symbols correspond to time domain OCC ⁇ +1, -1 ⁇ respectively. In this way, the DMRS corresponding to the newly added port can be code division multiplexed with the DMRS corresponding to the existing port to achieve code domain orthogonality.
  • Method B2 Use FD-OCC and TD-OCC to distinguish the DMRS corresponding to the port.
  • This method B2 is similar to the above-mentioned method A3.
  • the ports in the first port set and the ports in the second port set correspond to different time domain OCCs, and the ports in the first port set and the ports in the second port set correspond to different OCCs. Frequency domain OCC.
  • Table 10A shows an example of the mask elements corresponding to the DMRS sequences corresponding to each port on each resource in mode B2.
  • the existing port 0 corresponds to frequency domain OCC ⁇ +1,+1 ⁇ on subcarrier 1 and subcarrier 3 respectively;
  • the existing port 1 corresponds to subcarrier 1 and subcarrier 3 respectively.
  • 3 respectively corresponds to the frequency domain OCC ⁇ +1,-1 ⁇ ;
  • the existing port 4 corresponds to the frequency domain OCC ⁇ +1,+1 ⁇ on subcarrier 1 and subcarrier 3 respectively;
  • the existing port 5 corresponds to the frequency domain OCC ⁇ +1,+1 ⁇ on subcarrier 1 and subcarrier 3. 1.
  • the newly added port 9 corresponds to frequency domain OCC ⁇ +1,-1 ⁇ on subcarrier 1 and subcarrier 3 respectively;
  • the newly added port 12 corresponds to frequency domain OCC ⁇ +1,+1 ⁇ on subcarrier 1 and subcarrier 3 respectively;
  • the newly added port 13 corresponds to frequency domain OCC ⁇ +1,-1 ⁇ on subcarrier 1 and subcarrier 3 respectively.
  • the existing port 0 corresponds to the time domain OCC ⁇ +1,+1,+1,+1 ⁇ on symbol 2, symbol 3, symbol 10 and symbol 11 respectively;
  • the existing port 1 corresponds to symbol 2, symbol 3, symbol 11.
  • 10 and symbol 11 correspond to time domain OCC ⁇ +1,+1,+1,+1 ⁇ respectively;
  • the existing port 4 corresponds to time domain OCC ⁇ +1 on symbol 2, symbol 3, symbol 10 and symbol 11 respectively.
  • the existing port 5 corresponds to time domain OCC ⁇ +1,-1,+1,-1 ⁇ on symbol 2, symbol 3, symbol 10 and symbol 11 respectively;
  • new Port 8 corresponds to time domain OCC ⁇ +1,+1,-1,-1 ⁇ on symbols 2, 3, 10 and 11 respectively;
  • the newly added port 9 is on symbols 2, 3, 10 and 11 respectively.
  • Symbol 11 corresponds to the time domain OCC ⁇ +1,+1,-1,-1 ⁇ respectively; the newly added port 12 corresponds to the time domain OCC ⁇ +1,+ on symbol 2, symbol 3, symbol 10 and symbol 11 respectively. 1,-1,+1 ⁇ ; the newly added port 13 corresponds to the time domain OCC ⁇ +1,+1,-1,+1 ⁇ on symbol 2, symbol 3, symbol 10 and symbol 11 respectively.
  • the DMRS corresponding to the newly added port and the DMRS corresponding to the existing port can be distinguished by the 2-length frequency domain OCC and the 4-length time domain OCC to achieve code domain orthogonality.
  • port 2 port 3, port 6, port 7, port 10, port 11, port 14 and port 15
  • the DMRS corresponding to the port is distinguished in a similar manner to port 12 and port 13.
  • the mask elements corresponding to the DMRS sequences corresponding to each port on each resource may be as shown in Table 10B.
  • Table 11A shows another example of the mask elements corresponding to the DMRS sequences corresponding to each port on each resource in mode B2.
  • the existing port 0 corresponds to frequency domain OCC ⁇ +1,+1,+1,+1 ⁇ on subcarrier 1, subcarrier 3, subcarrier 5 and subcarrier 7 respectively.
  • the existing port 1 corresponds to frequency domain OCC ⁇ +1,-1,+1,-1 ⁇ on subcarrier 1, subcarrier 3, subcarrier 5 and subcarrier 7 respectively;
  • the existing port 4 is on subcarrier 1 , subcarrier 3, subcarrier 5 and subcarrier 7 respectively correspond to frequency domain OCC ⁇ +1,+1,+1,+1 ⁇ ;
  • the existing port 5 is on subcarrier 1, subcarrier 3, subcarrier 5 and subcarrier 7 corresponds to frequency domain OCC ⁇ +1,-1,+1,-1 ⁇ respectively;
  • the newly added port 8 corresponds to frequency domain OCC ⁇ +1 on subcarrier 1, subcarrier 3, subcarrier 5 and subcarrier 7 respectively.
  • the new port 9 corresponds to frequency domain OCC ⁇ +1,-1,-1,+1 ⁇ on subcarrier 1, subcarrier 3, subcarrier 5 and subcarrier 7 respectively.
  • the newly added port 12 corresponds to frequency domain OCC ⁇ +1,+1,-1,-1 ⁇ on subcarrier 1, subcarrier 3, subcarrier 5 and subcarrier 7 respectively;
  • the new port 13 is on subcarrier 1 , subcarrier 3, subcarrier 5 and subcarrier 7 respectively correspond to frequency domain OCC ⁇ +1,-1,-1,+1 ⁇ .
  • the existing port 0 corresponds to the time domain OCC ⁇ +1,+1,+1,+1 ⁇ on symbol 2, symbol 3, symbol 10 and symbol 11 respectively;
  • the existing port 1 corresponds to symbol 2, symbol 3, symbol 11.
  • 10 and symbol 11 correspond to time domain OCC ⁇ +1,+1,+1,+1 ⁇ respectively;
  • the existing port 4 corresponds to time domain OCC ⁇ +1 on symbol 2, symbol 3, symbol 10 and symbol 11 respectively.
  • the existing port 5 corresponds to time domain OCC ⁇ +1,-1,+1,-1 ⁇ on symbol 2, symbol 3, symbol 10 and symbol 11 respectively;
  • new Port 8 corresponds to time domain OCC ⁇ +1,+1,-1,-1 ⁇ on symbols 2, 3, 10 and 11 respectively;
  • the newly added port 9 is on symbols 2, 3, 10 and 11 respectively.
  • Symbol 11 corresponds to the time domain OCC ⁇ +1,+1,-1,-1 ⁇ respectively; the newly added port 12 corresponds to the time domain OCC ⁇ +1,- on symbol 2, symbol 3, symbol 10 and symbol 11 respectively. 1,-1,+1 ⁇ ; the newly added port 13 corresponds to the time domain OCC ⁇ +1,-1,-1,+1 ⁇ on symbol 2, symbol 3, symbol 10 and symbol 11 respectively.
  • the DMRS corresponding to the newly added port and the DMRS corresponding to the existing port can be distinguished by 4-length frequency domain OCC and 4-length time domain OCC to achieve code domain orthogonality.
  • port 2 port 3, port 6, port 7, port 10, port 11, port 14 and port 15
  • the DMRS corresponding to the port is distinguished in a similar manner to port 12 and port 13.
  • the mask elements corresponding to the DMRS sequences corresponding to each port on each resource can be as shown in Table 11B.
  • Case 3 Add an additional set of DMRS symbols to the front-loaded single symbol Type 2 DMRS.
  • Figure 10 shows the time-frequency resource mapping method in case 3.
  • 6 new ports can be added; the port index of the new 6 ports can be 12-17.
  • Both existing ports and new ports can be mapped to REs corresponding to symbol 2 (i.e., front-loaded symbol) and symbol 11 (i.e., additional DMRS symbol).
  • the following takes port 0, port 1, port 12, and port 13 as examples to explain how to distinguish the DMRS corresponding to the ports.
  • the first port set includes port 0 and port 1
  • the second port set includes port 12 and port 13.
  • the DMRS corresponding to the first port set and the DMRS corresponding to the second port set may be transmitted through the same resource.
  • the DMRS corresponding to the port can be distinguished in a manner similar to any of the above-mentioned methods A1 to A5. Some of the methods will be described in detail below.
  • Method C1 Use TD-OCC to distinguish the DMRS corresponding to the port.
  • This method C1 is similar to the above-mentioned method A1.
  • the ports in the first port set and the ports in the second port set correspond to different time domain OCCs.
  • Table 12A shows an example of the mask elements corresponding to the DMRS sequences corresponding to each port on each resource in mode C1. As shown in Table 12A
  • the corresponding DMRS sequence does not change, and the symbol 2 and symbol 11 correspond to the time domain OCC ⁇ +1,+1 ⁇ respectively; for the new port 12, the corresponding The DMRS sequence on symbol 2 is the same as the existing port 0, and symbol 2 and symbol 11 correspond to the time domain OCC ⁇ +1,-1 ⁇ respectively; for the newly added port 13, its corresponding DMRS sequence is on symbol 2 Same as the existing port 1, symbol 2 and symbol 11 correspond to time domain OCC ⁇ +1,-1 ⁇ respectively.
  • the DMRS corresponding to the newly added port and the DMRS corresponding to the existing port can be distinguished through 2-long time domain OCC to achieve code domain orthogonality. In this way, the number of DMRS ports can be increased.
  • port 2 for port 3, port 14, and port 15, a similar method to port 0, port 1, port 12, and port 13 can be used to distinguish the DMRS corresponding to the ports.
  • the mask elements corresponding to the DMRS sequences corresponding to each port on each resource can be as shown in Table 12B.
  • port 5 for port 4, port 5, port 16, and port 17, a similar method to port 0, port 1, port 12, and port 13 can be used to distinguish the DMRS corresponding to the ports.
  • the mask elements corresponding to the DMRS sequences corresponding to each port on each resource can be as shown in Table 12C.
  • Method C2 Use FD-OCC and TD-OCC to distinguish the DMRS corresponding to the port.
  • This method C2 is similar to the above-mentioned method A3.
  • the ports in the first port set and the ports in the second port set correspond to different time domain OCCs, and the ports in the first port set and the ports in the second port set correspond to different time domain OCCs. Frequency domain OCC.
  • Table 13A shows an example of the mask elements corresponding to the DMRS sequences corresponding to each port on each resource in mode C2.
  • the existing port 0 corresponds to frequency domain OCC ⁇ +1,+1,+1,+1 ⁇ on subcarrier 1, subcarrier 2, subcarrier 7 and subcarrier 8 respectively.
  • the existing port 1 corresponds to frequency domain OCC ⁇ +1,-1,+1,-1 ⁇ on subcarrier 1, subcarrier 2, subcarrier 7 and subcarrier 8 respectively;
  • the new port 12 is on subcarrier 1 , subcarrier 2
  • Subcarrier 7 and subcarrier 8 correspond to frequency domain OCC ⁇ +1,+1,-1,-1 ⁇ respectively;
  • the newly added port 13 corresponds to frequency domain OCC on subcarrier 1, subcarrier 2, subcarrier 7 and subcarrier 8 respectively.
  • the DMRS corresponding to the newly added port and the DMRS corresponding to the existing port can be distinguished through the 4-length frequency domain OCC and the 2-length time domain OCC to achieve code domain orthogonality.
  • port 2 for port 2, port 3, port 14, and port 15, a similar method to port 0, port 1, port 12, and port 13 can be used to distinguish the DMRS corresponding to the ports.
  • the mask elements corresponding to the DMRS sequences corresponding to each port on each resource can be as shown in Table 13B.
  • port 5 for port 4, port 5, port 16, and port 17, a similar method to port 0, port 1, port 12, and port 13 can be used to distinguish the DMRS corresponding to the ports.
  • the mask elements corresponding to the DMRS sequences corresponding to each port on each resource can be as shown in Table 13C.
  • Case 4 Add an additional set of DMRS symbols to the front-loaded dual-symbol Type 2 DMRS.
  • Figure 11 shows the time-frequency resource mapping method in case 4.
  • 12 new ports can be added; the port index of the 12 new ports can be 12-23.
  • Both existing ports and new ports can be mapped to REs corresponding to symbol 2, symbol 3, symbol 10, and symbol 11; among them, symbol 2 and symbol 3 are front-loaded symbols, and symbol 10 and symbol 11 are additional DMRS symbols.
  • the following takes port 0, port 1, port 6, port 7, port 12, port 13, port 18, and port 19 as examples to explain how to implement orthogonality between the DMRS corresponding to the existing ports and the DMRS corresponding to the new port.
  • the first port set includes port 0, port 1, port 6, and port 7, and the second port set includes port 12, port Port 13, Port 18 and Port 19.
  • the DMRS corresponding to the first port set and the DMRS corresponding to the second port set may be transmitted through the same resource.
  • the DMRS corresponding to the port can be distinguished in a manner similar to any of the above-mentioned methods A1 to A5. Some of the methods will be described in detail below.
  • Method D1 Use TD-OCC to distinguish the DMRS corresponding to the port.
  • This method D1 is similar to the above-mentioned method A1.
  • the ports in the first port set and the ports in the second port set correspond to different time domain OCCs.
  • the corresponding DMRS sequences do not change, and the front-loaded symbols and additional DMRS symbols correspond to the time domain OCC ⁇ +1,+1 ⁇ respectively;
  • the front-loaded symbols and additional DMRS symbols correspond to time domain OCC ⁇ +1, -1 ⁇ respectively;
  • the DMRS corresponding to the newly added port can be code division multiplexed with the DMRS corresponding to the existing port to achieve code domain orthogonality.
  • Method D2 Use FD-OCC and TD-OCC to distinguish the DMRS corresponding to the port.
  • This method D2 is similar to the above-mentioned method A3.
  • the ports in the first port set and the ports in the second port set correspond to different time domain OCCs, and the ports in the first port set and the ports in the second port set correspond to different OCCs. Frequency domain OCC.
  • Table 14A shows an example of the mask elements corresponding to the DMRS sequences corresponding to each port on each resource in mode D2.
  • the existing port 0 corresponds to the frequency domain OCC ⁇ +1,+1 ⁇ on subcarrier 1 and subcarrier 2 respectively;
  • the existing port 1 is on subcarrier 1 and subcarrier 2 respectively.
  • 2 corresponds to frequency domain OCC ⁇ +1,-1 ⁇ respectively;
  • the existing port 6 corresponds to frequency domain OCC ⁇ +1,+1 ⁇ on subcarrier 1 and subcarrier 2 respectively;
  • the existing port 7 corresponds to subcarrier 1 and subcarrier 2. 1.
  • Subcarrier 2 corresponds to frequency domain OCC ⁇ +1,-1 ⁇ respectively;
  • the newly added port 12 corresponds to frequency domain OCC ⁇ +1,+1 ⁇ on subcarrier 1 and subcarrier 2 respectively;
  • the newly added port 13 corresponds to frequency domain OCC ⁇ +1,-1 ⁇ on subcarrier 1 and subcarrier 2 respectively;
  • the newly added port 18 corresponds to frequency domain OCC ⁇ +1,+1 ⁇ on subcarrier 1 and subcarrier 2 respectively;
  • the newly added port 19 corresponds to frequency domain OCC ⁇ +1,-1 ⁇ on subcarrier 1 and subcarrier 2 respectively.
  • the existing port 0 corresponds to the time domain OCC ⁇ +1,+1,+1,+1 ⁇ on symbol 2, symbol 3, symbol 10 and symbol 11 respectively;
  • the existing port 1 corresponds to symbol 2, symbol 3, symbol 11.
  • 10 and symbol 11 correspond to time domain OCC ⁇ +1,+1,+1,+1 ⁇ respectively;
  • the existing port 6 corresponds to time domain OCC ⁇ +1 on symbol 2, symbol 3, symbol 10 and symbol 11 respectively.
  • the existing port 7 corresponds to time domain OCC ⁇ +1,-1,+1,-1 ⁇ on symbol 2, symbol 3, symbol 10 and symbol 11 respectively;
  • new The port 12 corresponds to the time domain OCC ⁇ +1,+1,-1,-1 ⁇ on symbols 2, 3, 10 and 11 respectively;
  • the newly added port 13 is on symbols 2, 3, 10 and 11 respectively.
  • Symbol 11 corresponds to the time domain OCC ⁇ +1,+1,-1,-1 ⁇ respectively; the newly added port 18 corresponds to the time domain OCC ⁇ +1,- on symbol 2, symbol 3, symbol 10 and symbol 11 respectively. 1,-1,+1 ⁇ ; the newly added port 19 corresponds to the time domain OCC ⁇ +1,-1,-1,+1 ⁇ on symbol 2, symbol 3, symbol 10 and symbol 11 respectively.
  • the DMRS corresponding to the newly added port and the DMRS corresponding to the existing port can be distinguished by the 2-length frequency domain OCC and the 4-length time domain OCC to achieve code domain orthogonality.
  • port 2 port 3, port 8, port 9, port 14, port 15, port 20, and port 21
  • the DMRS corresponding to the ports can also be distinguished in a manner similar to port 0, port 1, port 6, port 7, port 12, port 13, port 18 and port 19.
  • the mask elements corresponding to the DMRS sequences corresponding to each port on each resource can be as shown in Table 14B.
  • port 5 port 10, port 11, port 16, port 17, port 22 and port 23
  • the DMRS corresponding to the port is distinguished in a similar manner to port 18 and port 19.
  • the mask elements corresponding to the DMRS sequences corresponding to each port on each resource can be as shown in Table 14C.
  • Table 15A shows another example of the mask elements corresponding to the DMRS sequences corresponding to each port on each resource in mode D2.
  • the existing port 0 corresponds to frequency domain OCC ⁇ +1,+1,+1,+1 ⁇ on subcarrier 1, subcarrier 2, subcarrier 7 and subcarrier 8 respectively.
  • the existing port 1 corresponds to frequency domain OCC ⁇ +1,-1,+1,-1 ⁇ on subcarrier 1, subcarrier 2, subcarrier 7 and subcarrier 8 respectively;
  • the existing port 6 is on subcarrier 1 , subcarrier 2, subcarrier 7 and subcarrier 8 respectively correspond to frequency domain OCC ⁇ +1,+1,+1,+1 ⁇ ;
  • the existing port 7 is on subcarrier 1, subcarrier 2, subcarrier 7 and subcarrier 8 corresponds to frequency domain OCC ⁇ +1,-1,+1,-1 ⁇ respectively;
  • the newly added port 12 corresponds to frequency domain OCC ⁇ +1 on subcarrier 1, subcarrier 2, subcarrier 7 and subcarrier 8 respectively.
  • the new port 13 corresponds to frequency domain OCC ⁇ +1,-1,-1,+1 ⁇ on subcarrier 1, subcarrier 2, subcarrier 7 and subcarrier 8 respectively.
  • the newly added port 18 corresponds to frequency domain OCC ⁇ +1,+1,-1,-1 ⁇ on subcarrier 1, subcarrier 2, subcarrier 7 and subcarrier 8 respectively;
  • the new port 19 is on subcarrier 1 , subcarrier 2, subcarrier 7 and subcarrier 8 respectively correspond to frequency domain OCC ⁇ +1,-1,-1,+1 ⁇ .
  • the existing port 0 corresponds to the time domain OCC ⁇ +1,+1,+1,+1 ⁇ on symbol 2, symbol 3, symbol 10 and symbol 11 respectively;
  • the existing port 1 corresponds to symbol 2, symbol 3, symbol 11.
  • 10 and symbol 11 correspond to time domain OCC ⁇ +1,+1,+1,+1 ⁇ respectively;
  • the existing port 6 corresponds to time domain OCC ⁇ +1 on symbol 2, symbol 3, symbol 10 and symbol 11 respectively.
  • the existing port 7 corresponds to time domain OCC ⁇ +1,-1,+1,-1 ⁇ on symbol 2, symbol 3, symbol 10 and symbol 11 respectively;
  • new The port 12 corresponds to the time domain OCC ⁇ +1,+1,-1,-1 ⁇ on symbols 2, 3, 10 and 11 respectively;
  • the newly added port 13 is on symbols 2, 3, 10 and 11 respectively.
  • Symbol 11 corresponds to the time domain OCC ⁇ +1,+1,-1,-1 ⁇ respectively; the newly added port 18 corresponds to the time domain OCC ⁇ +1,- on symbol 2, symbol 3, symbol 10 and symbol 11 respectively. 1,-1,+1 ⁇ ; the newly added port 19 corresponds to the time domain OCC ⁇ +1,-1,-1,+1 ⁇ on symbol 2, symbol 3, symbol 10 and symbol 11 respectively.
  • the DMRS corresponding to the newly added port and the DMRS corresponding to the existing port can be distinguished by 4-length frequency domain OCC and 4-length time domain OCC to achieve code domain orthogonality.
  • port 2 port 3, port 8, port 9, port 14, port 15, port 20 and port 21
  • the DMRS corresponding to the port is distinguished in a similar manner to port 18 and port 19.
  • the mask elements corresponding to the DMRS sequences corresponding to each port on each resource can be as shown in Table 15B.
  • port 5 port 10, port 11, port 16, port 17, port 22 and port 23
  • the DMRS corresponding to the port is distinguished in a similar manner to port 18 and port 19.
  • the mask elements corresponding to the DMRS sequences corresponding to each port on each resource can be as shown in Table 15C.
  • the front-loaded symbol is symbol 2 and the additional DMRS symbol is symbol 11. It is only an example; the front-loaded symbol and the additional DMRS symbol can be other symbols shown in Table 3, for example, front The -loaded symbol is symbol 2, and the additional DMRS symbol is symbol 9.
  • the front-loaded symbols are symbol 2 and symbol 3, and the additional DMRS symbols are symbol 10 and symbol 11, which are examples only; the front-loaded symbols and additional DMRS symbols can be other symbols shown in Table 4, For example, front-loaded symbols are symbol 2 and symbol 3, and additional DMRS symbols are symbol 12 and symbol 13.
  • the number of DMRS ports can be increased to at least 2 times that without additional DMRS symbols.
  • this embodiment takes adding a new set of additional DMRS symbols as an example for explanation.
  • a similar method for example, extending the code grouping of TD-OCC
  • 2-long TD-OCC can be used to distinguish DMRS transmitted through 1 group of front-loaded symbols and 1 group of additional DMRS symbols; in a similar manner, 4-long TD-OCC can be used to distinguish between 1 group of front-loaded symbols and 1 group of additional DMRS symbols.
  • the embodiment of the present application provides a communication device through Figure 12, which can be used to perform the functions of the relevant steps in the above method embodiment.
  • the functions described can be implemented by hardware, or can be implemented by software or hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the communication device is shown in Figure 12, including a communication unit 1201 and a processing unit 1202.
  • the communication device 1200 can be applied to network equipment or terminal equipment in the communication system shown in Figure 1, and can implement the communication methods provided in the above embodiments and examples of the present application.
  • the functions of each unit in the communication device 1200 are introduced below.
  • the communication unit 1201 is used to receive and send data.
  • the communication unit 1201 can be implemented by a transceiver, for example, a mobile communication module.
  • the mobile communication module may include at least one antenna, at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA), etc.
  • the AN device can communicate with the accessed terminal device through the mobile communication module.
  • the processing unit 1202 may be used to support the communication device 1200 in performing the processing actions in the above method embodiments.
  • the processing unit 1202 may be implemented by a processor.
  • the processor can be a central processing unit (CPU), or other general-purpose processor, digital signal processor (DSP), application specific integrated circuit (ASIC) , field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor can be a microprocessor or any conventional processor.
  • the communication device 1200 is applied to the sending device in the embodiment of the present application shown in FIG. 7 .
  • the specific functions of the processing unit 1202 in this embodiment will be introduced below.
  • the processing unit 1202 is used for:
  • the reference signal is sent through the communication unit 1201 through a first resource and a second resource; wherein the first port belongs to a first port set or a second port set, and the first resource is located in a first orthogonal frequency division Multiplexing OFDM symbols; the second resource is located in a second OFDM symbol, and the first OFDM symbol and the second OFDM symbol are not adjacent;
  • the reference signals corresponding to the ports in the first port set correspond to the first mask on the first resource and the second resource, and the reference signals corresponding to the ports in the second port set are on the first resource.
  • a resource and the second resource correspond to a second mask, and the first mask and the second mask are different.
  • the first OFDM symbol is a preamble demodulation reference signal DMRS symbol
  • the second OFDM symbol is an additional DMRS symbol.
  • the processing unit 1202 is specifically configured to: before sending the reference signal through the first resource and the second resource, receive the first indication information from the network device through the communication unit 1201, the first indication The information is used to indicate that the reference signal corresponding to the first port is sent through a first method; wherein the first method is through the The first resource and the second resource send the reference signal of the first port.
  • the first indication information includes a first port index, and the first port index is used to indicate the first mode.
  • processing unit 1202 is specifically used to:
  • Second instruction information is received from the network device through the communication unit 1201, and the second instruction information is used to instruct the reference signal corresponding to the first port to be sent in a second way; wherein the second way is to send the reference signal corresponding to the first port through the second way.
  • the third resource and the fourth resource transmit the reference signal of the first port; wherein the third resource and the fourth resource are located on different frequency domain resources, and the reference signal corresponding to the port in the first port set
  • the third resource and the fourth resource correspond to the third mask, and the reference signal corresponding to the port in the second port set corresponds to the fourth mask on the third resource and the fourth resource.
  • the codes correspond to each other, and the third mask and the fourth mask are different;
  • the communication unit 1201 sends the reference signal corresponding to the first port through the third resource and the fourth resource.
  • the second indication information includes a second port index, and the second port index is used to indicate the second mode.
  • processing unit 1202 is specifically used to:
  • Third instruction information is received from the network device through the communication unit 1201, and the third instruction information is used to instruct the reference signal corresponding to the first port to be sent in a third way; wherein the third way is: when When the first port belongs to the first port set, the reference signal corresponding to the first port is sent through the fifth resource; when the first port belongs to the second port set, the reference signal corresponding to the first port is sent through the sixth resource.
  • the reference signal corresponding to the first port; the fifth resource and the sixth resource are located on different frequency domain resources;
  • the communication unit 1201 sends the reference signal corresponding to the first port through the fifth resource or the sixth resource.
  • the third indication information includes a third port index, and the third port index is used to indicate the third mode.
  • elements in the sequence of reference signals corresponding to the first port correspond to resource elements RE in the first resource
  • elements in the sequence of reference signals corresponding to the first port correspond to the resource elements RE in the first resource
  • REs in the second resource have one-to-one correspondence.
  • the sequence of reference signals corresponding to the first port includes one of the following elements: 2, 4, 6, 8, or 12.
  • the communication device 1200 is applied to the receiving device in the embodiment of the present application shown in FIG. 7 .
  • the specific functions of the processing unit 1202 in this embodiment will be introduced below.
  • the processing unit 1202 is used for:
  • the communication unit 1201 receives the reference signal corresponding to the first port through the first resource and the second resource; wherein the first port belongs to the first port set or the second port set, and the first resource is located in the first Cross-frequency division multiplexing OFDM symbols, the second resource is located in the second OFDM symbol, and the first OFDM symbol and the second OFDM symbol are not adjacent;
  • the reference signals corresponding to the ports in the first port set correspond to the first mask on the first resource and the second resource, and the reference signals corresponding to the ports in the second port set are on the first resource.
  • a resource and the second resource correspond to a second mask, and the first mask and the second mask are different.
  • the first OFDM symbol is a preamble demodulation reference signal DMRS symbol
  • the second OFDM symbol is an additional DMRS symbol.
  • the processing unit 1202 is specifically configured to: before receiving the reference signal corresponding to the first port through the first resource and the second resource, send the first indication information through the communication unit 1201, the first indication information Used to instruct to send the reference signal corresponding to the first port through a first manner; wherein the first manner is to transmit the reference signal for the first port through the first resource and the second resource.
  • the first indication information includes a first port index, and the first port index is used to indicate the first mode.
  • processing unit 1202 is specifically used to:
  • the second instruction information is sent through the communication unit 1201, and the second instruction information is used to instruct the reference signal corresponding to the first port to be sent in a second way; wherein the second way is to send the reference signal corresponding to the first port through the third resource and the third resource.
  • Four resources are used to transmit the reference signal of the first port; wherein the third resource and the fourth resource are located on different frequency domain resources, and the reference signal corresponding to the port in the first port set is in the first port set.
  • the three resources and the fourth resource correspond to the third mask, and the reference signal corresponding to the port in the second port set corresponds to the fourth mask on the third resource and the fourth resource, so The third mask and the fourth mask are different;
  • the communication unit 1201 receives the reference signal corresponding to the first port through the third resource and the fourth resource.
  • the second indication information includes a second port index, and the second port index is used to indicate the second mode.
  • processing unit 1202 is specifically used to:
  • Third indication information is sent through the communication unit 1201, and the third indication information is used to instruct to send the reference signal corresponding to the first port in a third way; wherein the third way is: when the first When the port belongs to the first port set, the reference signal corresponding to the first port is sent through the fifth resource; when the first port belongs to the second port set, the reference signal corresponding to the first port is sent through the sixth resource.
  • the corresponding reference signal; the fifth resource and the sixth resource are located on different frequency domain resources;
  • the communication unit 1201 receives the reference signal corresponding to the first port through the fifth resource or the sixth resource.
  • the third indication information includes a third port index, and the third port index is used to indicate the third mode.
  • elements in the sequence of reference signals corresponding to the first port correspond to resource elements RE in the first resource
  • elements in the sequence of reference signals corresponding to the first port correspond to the resource elements RE in the first resource
  • REs in the second resource have one-to-one correspondence.
  • the sequence of reference signals corresponding to the first port includes one of the following elements: 2, 4, 6, 8, or 12.
  • each function in each embodiment of the present application can be integrated into one processing unit, or they can exist physically alone, or two or more units can be integrated into one unit.
  • the above integrated units can be implemented in the form of hardware or software functional units.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or contributes to the existing technology, or all or 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 to cause a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in various embodiments of the application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code. .
  • the embodiment of the present application provides a communication device as shown in Figure 13, which can be used to perform relevant steps in the above method embodiment.
  • the communication device can be applied to network equipment or terminal equipment in the communication system shown in Figure 1, can implement the communication method provided in the above embodiments and examples of the present application, and has the function of the communication device shown in Figure 12.
  • the communication device 1300 includes: a communication module 1301 , a processor 1302 and a memory 1303 .
  • the communication module 1301, the processor 1302 and the memory 1303 are connected to each other.
  • the communication module 1301, the processor 1302 and the memory 1303 are connected to each other through a bus 1304.
  • the bus 1304 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in Figure 13, but it does not mean that there is only one bus or one type of bus.
  • the communication module 1301 is used to receive and send data to implement communication interaction with other devices.
  • the communication module 1301 can be implemented through a physical interface, a communication module, a communication interface, and an input and output interface.
  • the processor 1302 may be configured to support the communication device 1300 in performing the processing actions in the above method embodiment. When the communication device 1300 is used to implement the above method embodiment, the processor 1302 may also be used to implement the functions of the above processing unit 1202.
  • the processor 1302 may be a CPU, or other general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, transistor logic device, hardware component or any combination thereof.
  • a general-purpose processor can be a microprocessor or any conventional processor.
  • the communication device 1300 is applied to the sending device in the embodiment of the present application shown in FIG. 7 .
  • the processor 1302 is specifically used to:
  • the reference signal is sent through the communication module 1301 through a first resource and a second resource; wherein the first port belongs to a first port set or a second port set, and the first resource is located in a first orthogonal frequency division Multiplexing OFDM symbols, the second resource is located in the second OFDM symbol, and the first OFDM symbol and the second OFDM symbol are not adjacent;
  • the reference signals corresponding to the ports in the first port set correspond to the first mask on the first resource and the second resource, and the reference signals corresponding to the ports in the second port set are on the first resource.
  • a resource and the second resource correspond to a second mask, and the first mask and the second mask are different.
  • the communication device 1300 is applied to the receiving device in the embodiment of the present application shown in FIG. 7 .
  • the processor 1302 is specifically used to:
  • the communication module 1301 receives the reference signal corresponding to the first port through the first resource and the second resource; wherein the first port belongs to the first port set or the second port set, and the first resource is located in the first Cross-frequency division multiplexing OFDM symbols, the second resource is located in the second OFDM symbol, and the first OFDM symbol and the second OFDM symbol are not adjacent;
  • the reference signals corresponding to the ports in the first port set correspond to the first mask on the first resource and the second resource, and the reference signals corresponding to the ports in the second port set are on the first resource.
  • a resource and the second resource correspond to a second mask, and the first mask and the second mask are different.
  • processor 1302 For the specific functions of the processor 1302, please refer to the description of the communication method provided in the above embodiments of the present application and examples, as well as the specific functional description of the communication device 1200 in the embodiment of the present application shown in Figure 12, which will not be repeated here. Repeat.
  • the memory 1303 is used to store program instructions and data.
  • program instructions may include program code including computer operating instructions.
  • the memory 1303 may include RAM, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.
  • the processor 1302 executes the program instructions stored in the memory 1303, and uses the data stored in the memory 1303 to implement the above functions, thereby realizing the above communication method provided by the embodiment of the present application.
  • the memory 1303 in Figure 13 of this application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories.
  • the non-volatile memory can be ROM, programmable ROM (PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM) ,EEPROM) or flash memory.
  • Volatile memory can be RAM, which acts as an external cache.
  • RAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • Synchlink DRAM SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • embodiments of the present application also provide a computer program, which when the computer program is run on a computer, causes the computer to execute the method provided in the above embodiments.
  • embodiments of the present application also provide a computer-readable storage medium.
  • the computer-readable storage medium stores a computer program.
  • the computer program When the computer program is executed by a computer, it causes the computer to execute the method provided in the above embodiments. .
  • the storage medium may be any available medium that can be accessed by the computer. Taking this as an example but not limited to: computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or can be used to carry or store instructions or data structures. Any other medium that contains the desired program code and is capable of being accessed by a computer.
  • embodiments of the present application also provide a chip, which is used to read the computer program stored in the memory and implement the method provided in the above embodiments.
  • embodiments of the present application provide a chip system.
  • the chip system includes a processor and is used to support the computer device to implement the functions involved in each device in the above embodiments.
  • the chip also includes a memory for storing necessary programs and data for the computer device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • embodiments of the present application provide a communication method, apparatus and equipment.
  • the sending device can send the reference signal through the first resource and the second resource.
  • the first port belongs to the first port set or the second port set, the first resource is located in the first OFDM symbol, the second resource is located in the second OFDM symbol, and the first OFDM symbol and the second OFDM symbol are not adjacent.
  • the reference signal corresponding to the port in the first port set corresponds to the first mask on the first resource and the second resource, and the reference signal corresponding to the port in the second port set corresponds to the second mask on the first resource and the second resource.
  • Mask correspondence, the first mask and the second mask are different.
  • the sending device can transmit the reference signal through the resources on multiple non-adjacent OFDM symbols; and the resources of the reference signal corresponding to the port in the first port set on the multiple OFDM symbols correspond to the first mask, The resources of the reference signals corresponding to the ports in the first port set on the multiple OFDM symbols correspond to the second mask.
  • the first mask and the second mask are different, so that the number of ports can be expanded through multiple non-adjacent OFDM symbols. , which can support more transmission streams.
  • embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions
  • the device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.
  • These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device.
  • Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.

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Abstract

本申请公开了一种通信方法、装置及设备，用于支持更多的传输流数。该方法为：发送设备通过第一资源和第二资源发送第一端口对应的参考信号。第一资源和第二资源分别位于不相邻的第一OFDM符号和第二OFDM符号。第一端口属于第一端口集合或第二端口集合，第一端口集合中的端口对应的参考信号在第一资源和第二资源上与第一掩码对应，第二端口集合中的端口对应的参考信号在第一资源和第二资源上与第二掩码对应，第一掩码和第二掩码不同。通过该方法，发送设备通过不相邻的多个符号上的资源传输参考信号；不同端口集合中端口对应的参考信号在该多个符号上的资源对应的掩码不同，从而可通过不相邻的多个符号扩展端口数，进而可支持更多传输流数。

Description

一种通信方法、装置及设备
相关申请的交叉引用
本申请要求在2022年04月29日提交中国专利局、申请号为202210476540.1、申请名称为“一种通信方法、装置及设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法、装置及设备。
背景技术
解调参考信号(demodulation reference signal，DMRS)可用于估计数据信道(例如，物理下行共享信道(physical downlink shared channel，PDSCH))或控制信道(例如，物理下行控制信道(physical downlink control channel，PDCCH))的等效信道矩阵，从而用于数据的检测和解调。
通常来说，一个DMRS端口(port)与一个空间层相对应，每个空间层对应于一个传输流。对于传输流数为R的多输入多输出(multiple input and multiple output，MIMO)传输，需要的DMRS端口数目为R。目前第五代(the 5th，5G)新无线(new radio，NR)支持2种DMRS资源映射类型，分别为配置类型1(Type 1)DMRS和配置类型2(Type 2)DMRS。对于单符号DMRS配置，Type 1 DMRS最大可支持4个正交的DMRS端口，Type 2 DMRS最大可支持6个正交的DMRS端口。因此，对于单符号DMRS配置，目前NR最大仅能支持6流的MIMO传输。
随着未来无线通信设备部署更加密集，终端设备数目进一步增长，这对MIMO传输流数提出了更高的需求。此外，后续随着大规模MIMO(Massive MIMO)系统不断演进，收发天线数目也会进一步增加(例如，网络设备发送天线数目支持128T或256T，终端接收天线数目8R)，信道信息的获取将更加精准，从而可以进一步支持更高的传输流数以提升MIMO系统的频谱效率。这势必需要更多的DMRS端口来支撑更高的传输流数(单符号大于6流)。
发明内容
本申请提供一种通信方法、装置及设备，用于支持更多的传输流数。
第一方面，本申请实施例提供了一种通信方法。该方法包括：
发送设备在获取第一端口对应的参考信号之后，可通过第一资源和第二资源发送参考信号。其中，第一资源位于第一OFDM符号，第二资源位于第二OFDM符号，第一OFDM符号和第二OFDM符号不相邻。第一端口属于第一端口集合或第二端口集合，第一端口集合中的端口对应的参考信号在第一资源和第二资源上与第一掩码对应，第二端口集合中的端口对应的参考信号在第一资源和第二资源上与第二掩码对应，第一掩码和第二掩码不同。
通过该方法，发送设备可通过不相邻的多个OFDM符号上的资源传输参考信号；并且， 第一端口集合中端口对应的参考信号在该多个OFDM符号上的资源对应第一掩码，第一端口集合中端口对应的参考信号在该多个OFDM符号上的资源对应第二掩码，第一掩码和第二掩码不同，从而可通过不相邻的多个OFDM符号扩展端口数，进而可支持更多的传输流数。
在一种可能的设计中，第一OFDM符号为前置DMRS符号，第二OFDM符号为附加DMRS符号。该设计可通过已有的附加DMRS符号来增加DMRS端口数，从而可在额外占用资源的情况下，提高DMRS端口数，支持更多的传输流数。
在一种可能的设计中，发送设备在通过第一资源和第二资源发送参考信号之前，可接收来自网络设备的第一指示信息。其中，第一指示信息可用于指示通过第一方式发送第一端口对应的参考信号；第一方式为通过第一资源和第二资源发送第一端口的参考信号。
通过该设计，发送设备可在网络设备的指示下，采用第一方式传输第一端口对应的参考信号。这样，网络设备可灵活配置发送设备发送参考信号的方式，从而适配不同场景下的DMRS信道估计能力。
在一种可能的设计中，第一指示信息包含第一端口索引，第一端口索引可用于指示第一方式。该设计易于实现。
在一种可能的设计中，上述方法还包括：发送设备在接收到来自网络设备的第二指示信息之后，通过第三资源和第四资源发送第一端口对应的参考信号。其中，第二指示信息可用于指示通过第二方式发送第一端口对应的参考信号；第二方式为通过第三资源和第四资源发送第一端口的参考信号。其中，第三资源和第四资源可位于不同的频域资源上，并且，第一端口集合中的端口对应的参考信号在第三资源和第四资源上与第三掩码对应，第二端口集合中的端口对应的参考信号在第三资源和第四资源上与第四掩码对应，第三掩码和第四掩码不同。
通过该设计，发送设备可在网络设备的指示下，采用第二方式传输第一端口对应的参考信号。这样，网络设备可灵活配置发送设备发送参考信号的方式，从而适配不同场景下的DMRS信道估计能力。
在一种可能的设计中，第二指示信息包含第二端口索引，第二端口索引可用于指示第二方式。该设计易于实现。
在一种可能的设计中，上述方法还包括：发送设备在接收来自网络设备的第三指示信息之后，可通过第五资源或第六资源发送第一端口对应的参考信号。其中，第三指示信息可用于指示通过第三方式发送第一端口对应的参考信号。第三方式为：当第一端口属于第一端口集合时，通过第五资源发送第一端口对应的参考信号；当第一端口属于第二端口集合时，通过第六资源发送第一端口对应的参考信号。其中，第五资源和第六资源位于不同的频域资源上。
通过该设计，发送设备可在网络设备的指示下，采用第三方式传输第一端口对应的参考信号。这样，网络设备可灵活配置发送设备发送参考信号的方式，从而适配不同场景下的DMRS信道估计能力。
在一种可能的设计中，第三指示信息包含第三端口索引，第三端口索引可用于指示第三方式。该设计易于实现。
在一种可能的设计中，第一端口对应的参考信号的序列中的元素与第一资源中的RE一一对应，第一端口对应的参考信号的序列中的元素与第二资源中的RE一一对应。通过 该设计，第一端口集合和第二端口集合中端口对应的参考信号均可重复映射至第一资源和第二资源；并且，第一端口集合中端口对应的参考信号在该多个OFDM符号上的资源对应第一掩码，第一端口集合中端口对应的参考信号在该多个OFDM符号上的资源对应第二掩码，第一掩码和第二掩码不同，从而可通过不相邻的多个OFDM符号扩展端口数，进而可支持更多的传输流数。
在一种可能的设计中，第一端口对应的参考信号的序列包括的元素个数为以下之一：2、4、6、8、12。
在一种可能的设计中，当用于传输参考信号的资源(例如，第一资源和/或第二资源)位于边缘子带时，发送设备可通过第一方式发送第一端口对应的参考信号；换句话说，对于边缘子带，可通过TD-OCC的方式增加端口数。当用于传输参考信号的资源(例如，第三资源和/或第四资源)位于非边缘子带时，发送设备可通过第二方式发送第一端口对应的参考信号；换句话说，对于非边缘子带，可通过FD-OCC的方式增加端口数。通过该设计，可适配不同场景下的DMRS信道估计能力。
第二方面，本申请实施例提供了一种通信方法。该方法包括：接收设备可通过第一资源和第二资源接收第一端口对应的参考信号。其中，第一资源位于第一正交频分复用OFDM符号，第二资源位于第二OFDM符号，第一OFDM符号和第二OFDM符号不相邻。第一端口属于第一端口集合或第二端口集合，第一端口集合中的端口对应的参考信号在第一资源和第二资源上与第一掩码对应，第二端口集合中的端口对应的参考信号在第一资源和第二资源上与第二掩码对应，第一掩码和第二掩码不同。
通过该方法，接收设备可通过不相邻的多个OFDM符号上的资源接收参考信号；并且，第一端口集合中端口对应的参考信号在该多个OFDM符号上的资源对应第一掩码，第一端口集合中端口对应的参考信号在该多个OFDM符号上的资源对应第二掩码，第一掩码和第二掩码不同，从而可通过不相邻的多个OFDM符号扩展端口数，进而可支持更多的传输流数。
在一种可能的设计中，第一OFDM符号为前置DMRS符号，第二OFDM符号为附加DMRS符号。该设计可通过已有的附加DMRS符号来增加DMRS端口数，从而可在额外占用资源的情况下，提高DMRS端口数，支持更多的传输流数。
在一种可能的设计中，在通过第一资源和第二资源接收第一端口对应的参考信号之前，接收设备还可发送第一指示信息。其中，第一指示信息可用于指示通过第一方式发送第一端口对应的参考信号；第一方式为通过第一资源和第二资源发送第一端口的参考信号。
通过该设计，接收设备可灵活配置发送设备发送参考信号的方式，从而适配不同场景下的DMRS信道估计能力。
在一种可能的设计中，第一指示信息包含第一端口索引，第一端口索引可用于指示第一方式。该设计易于实现。
在一种可能的设计中，上述方法还包括：接收设备在发送第二指示信息之后，可通过第三资源和第四资源接收第一端口对应的参考信号。其中，第二指示信息可用于指示通过第二方式发送第一端口对应的参考信号；第二方式为通过第三资源和第四资源发送第一端口的参考信号。其中，第三资源和第四资源位于不同的频域资源上；并且，第一端口集合中的端口对应的参考信号在第三资源和第四资源上与第三掩码对应，第二端口集合中的端 口对应的参考信号在第三资源和第四资源上与第四掩码对应，第三掩码和第四掩码不同。
通过该设计，接收设备可灵活配置发送设备发送参考信号的方式，从而适配不同场景下的DMRS信道估计能力。
在一种可能的设计中，第二指示信息包含第二端口索引，第二端口索引用于指示第二方式。该设计易于实现。
在一种可能的设计中，上述方法还包括：接收设备在发送第三指示信息之后，可通过第五资源或第六资源接收第一端口对应的参考信号。其中，第三指示信息可用于指示通过第三方式发送第一端口对应的参考信号。第三方式为：当第一端口属于第一端口集合时，通过第五资源发送第一端口对应的参考信号；当第一端口属于第二端口集合时，通过第六资源发送第一端口对应的参考信号。其中，第五资源和第六资源位于不同的频域资源上。
通过该设计，接收设备可灵活配置发送设备发送参考信号的方式，从而适配不同场景下的DMRS信道估计能力。
在一种可能的设计中，第三指示信息包含第三端口索引，第三端口索引可用于指示第三方式。该设计易于实现。
在一种可能的设计中，第一端口对应的参考信号的序列中的元素与第一资源中的资源粒子RE一一对应，第一端口对应的参考信号的序列中的元素与第二资源中的RE一一对应。通过该设计，第一端口集合和第二端口集合中端口对应的参考信号均可重复映射至第一资源和第二资源；并且，第一端口集合中端口对应的参考信号在该多个OFDM符号上的资源对应第一掩码，第一端口集合中端口对应的参考信号在该多个OFDM符号上的资源对应第二掩码，第一掩码和第二掩码不同，从而可通过不相邻的多个OFDM符号扩展端口数，进而可支持更多的传输流数。
在一种可能的设计中，第一端口对应的参考信号的序列包括的元素个数为以下之一：2、4、6、8、12。
在一种可能的设计中，当用于传输参考信号的资源(例如，第一资源和/或第二资源)位于边缘子带时，接收设备可接收发送设备通过第一方式发送的第一端口对应的参考信号；换句话说，对于边缘子带，可通过TD-OCC的方式增加端口数。当用于传输参考信号的资源(例如，第三资源和/或第四资源)位于非边缘子带时，接收设备接收发送设备通过第二方式发送的第一端口对应的参考信号；换句话说，对于非边缘子带，可通过FD-OCC的方式增加端口数。通过该设计，可适配不同场景下的DMRS信道估计能力。
第三方面，本申请实施例提供了一种通信装置，包括用于执行以上任一方面中各个步骤的单元。
第四方面，本申请实施例提供了一种通信设备，包括至少一个处理元件和至少一个存储元件，其中该至少一个存储元件用于存储程序和数据，该至少一个处理元件用于读取并执行存储元件存储的程序和数据，以使得本申请以上任一方面提供的方法被实现。
第五方面，本申请实施例提供了一种通信系统，包括：用于执行第一方面提供的方法的发送设备，用于执行第二方面提供的方法的接收设备。
第六方面，本申请实施例还提供了一种计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行上述任一方面提供的方法。
第七方面，本申请实施例还提供了一种计算机可读存储介质，所述计算机可读存储介 质中存储有计算机程序，当所述计算机程序被计算机执行时，使得所述计算机执行上述任一方面提供的方法。
第八方面，本申请实施例还提供了一种芯片，所述芯片用于读取存储器中存储的计算机程序，执行上述任一方面提供的方法。
第九方面，本申请实施例还提供了一种芯片系统，该芯片系统包括处理器，用于支持计算机装置实现上述任一方面提供的方法。在一种可能的设计中，所述芯片系统还包括存储器，所述存储器用于保存该计算机装置必要的程序和数据。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
上述第三方面至第九方面中任一方面可以达到的技术效果可以参照上述第一方面或第二方面中任一方面中任一种可能设计可以达到的技术效果说明，重复之处不予论述。
附图说明
图1为本申请实施例提供的一种通信系统的架构示意图；
图2为本申请实施例提供的一种网络设备的结构示意图；
图3为本申请实施例提供的另一种网络设备的结构示意图；
图4为Type 1 DMRS时频资源映射方法的示意图；
图5为Type 2 DMRS时频资源映射方法的示意图；
图6A为附加DMRS(additional DMRS)的一种配置图样的示意图；
图6B为additional DMRS的另一种配置图样的示意图；
图7为本申请实施例提供的一种通信方法的流程示意图；
图8为本申请实施例提供的第一种时频资源映射方法的示意图；
图9为本申请实施例提供的第二种时频资源映射方法的示意图；
图10为本申请实施例提供的第三种时频资源映射方法的示意图；
图11为本申请实施例提供的第四种时频资源映射方法的示意图；
图12为本申请实施例提供的一种通信装置的结构示意图；
图13为本申请实施例提供的一种通信设备的结构示意图。
具体实施方式
本申请提供一种通信方法、装置及设备，用以支持更多的传输流数。其中，方法、装置及设备是基于同一技术构思的，由于解决问题的原理相似，因此装置及设备与方法的实施可以相互参见，重复之处不再赘述。
通过本申请实施例提供的方案，发送设备在获取第一端口对应的参考信号之后，可通过第一资源和第二资源发送参考信号。其中，第一端口属于第一端口集合或第二端口集合，第一资源位于第一正交频分复用(orthogonal frequency division multiplexing，OFDM)符号，第二资源位于第二OFDM符号，第一OFDM符号和第二OFDM符号不相邻。第一端口集合中的端口对应的参考信号在第一资源和第二资源上与第一掩码对应，第二端口集合中的端口对应的参考信号在第一资源和第二资源上与第二掩码对应，第一掩码和第二掩码不同。通过该方案，发送设备可通过不相邻的多个OFDM符号上的资源传输参考信号；并且，第一端口集合中端口对应的参考信号在该多个OFDM符号上的资源对应第一掩码，第一端口 集合中端口对应的参考信号在该多个OFDM符号上的资源对应第二掩码，第一掩码和第二掩码不同，从而可通过不相邻的多个OFDM符号扩展端口数，进而可支持更多的传输流数。
以下，对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
1)、终端设备，是一种向用户提供语音和/或数据连通性的设备。终端设备又可以称为用户设备(user equipment，UE)、终端(terminal)、接入终端、终端单元、终端站、移动台(mobile station，MS)、远方站、远程终端、移动终端(mobile terminal，MT)、无线通信设备、用户终端设备(customer premise equipment，CPE)、终端代理或终端设备等。
例如，终端设备可以为具有无线连接功能的手持式设备，也可以是具有通信功能的车辆，车载设备(如车载通信装置，车载通信芯片)等。目前，一些终端设备的举例为：手机(mobile phone)、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)设备、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、平板电脑、带无线收发功能的电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备，虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等。
2)、网络设备，是移动通信系统中将终端设备接入到无线网络的设备。网络设备作为无线接入网中的节点，还可以称为基站、无线接入网(radio access network，RAN)节点(或设备)、接入点(access point，AP)、接入网(access network，AN)设备。
目前，一些网络设备的举例为：新一代节点B(generation Node B，gNB)、传输接收点(transmission reception point，TRP)、演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、传输点(transmitting and receiving point，TRP)、发射点(transmitting point，TP)、移动交换中心、家庭基站(例如，home evolved NodeB，或home Node B，HNB)，或基带单元(base band unit，BBU)等。
3)、空间层：对于空间复用MIMO系统，在相同频域资源上可以同时传输多路并行数据流，每一路数据流称为一个空间层。MIMO中的空间层还可以称为传输层、数据层、空间流等。
4)、边缘子带：当时，包含的RB个数为或的子带。其中，P′BWP.i为调度的子带的带宽，即调度的子带包含的RB个数，为{2,4}中的一个值。为调度的起始RB标识(identifier，ID)，为调度的RB的个数，mod表示取余数运算。
5)、本申请中，OFDM符号也可以称为符号。
本申请实施例中，对于名词的数目，除非特别说明，表示“单数名词或复数名词”，即“一个或多个”。“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关 系。例如，A/B，表示：A或B。“以下至少一项(个)”或其类似表达，是指这些项(个)中的任意组合，包括单项(个)或复数项(个)的任意组合。
另外，需要理解的是，在本申请的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不应理解为指示或暗示相对重要性，也不应理解为指示或暗示顺序。
下面将结合附图，对本申请实施例应用的通信系统进行描述。
图1示出了本申请实施例提供的方法适用的移动通信系统的结构。参阅图1所示，在该系统中包括：网络设备和终端设备。所述网络设备，是网络侧能够接收和发射无线信号的实体，负责为处于其覆盖范围内的终端设备提供无线接入有关的服务，实现物理层功能、资源调度和无线资源管理、服务质量(Quality of Service，QoS)管理、无线接入控制以及移动性管理功能。
所述终端设备，为用户侧能够接收和发射无线信号的实体，需要通过所述网络设备接入网络。所述终端设备可以为各种为用户提供语音和/或数据连通性的设备。
其中，所述终端设备可有多根发送天线和多根接收天线，具有多发能力和多收能力，能够通过多个发射通道发射信号，通过多个接收通道接收信号。
所述网络设备也可有多根发送天线和多根接收天线，具有多发能力和多收能力。当所述终端设备和所述网络设备具有多发能力和多收能力时，该系统还可以称为MIMO系统。
示例性的，本申请实施例中的网络设备的结构可以如图2所示。具体的，网络设备可以划分为集中单元(centralized unit，CU)节点和至少一个分布单元(distributed unit，DU)。其中，CU可以用于管理或者控制至少一个DU，也可以称之为CU与至少一个DU连接。这种结构可以将通信系统中网络设备的协议层拆开，其中部分协议层放在CU集中控制，剩下部分或全部协议层功能分布在DU中，由CU集中控制DU。以网络设备为gNB为例，gNB的协议层包括无线资源控制(radio resource control，RRC)层、业务数据适配协议(service data adaptation protocol，SDAP)层、分组数据汇聚协议(packet data convergence protocol，PDCP)层、无线链路控制(radio link control，RLC)层、媒体访问控制子层(media access control，MAC)层和物理层。其中，示例性的，CU可以用于实现RRC层、SDAP层和PDCP层的功能，DU可以用于实现RLC层、MAC层和物理层的功能。本申请实施例不对CU、DU包括的协议栈做具体限定。
示例性的，本申请实施例中的CU可以进一步分为一个控制面(CU-control plane，CU-CP)网元和多个用户面(CU-user plane，CU-UP)网元。其中，CU-CP可以用于控制面管理，CU-UP可以用于用户面数据传输。CU-CP与CU-UP之间的接口可以为E1口。CU-CP与DU之间的接口可以为F1-C，用于控制面信令的传输。CU-UP与DU之间的接口可以为F1-U，用于用户面数据传输。CU-UP与CU-UP之间可以通过Xn-U口进行连接，进行用户面数据传输。例如，以gNB为例，gNB的结构可以如图3所示。
还需要指出的是，图1所示的移动通信系统作为一个示例，并不对本申请实施例提供的方法适用的通信系统构成限定。总之，本申请实施例提供的方法和装置，适用于各种终端设备支持多发能力的通信系统和应用场景中，即本申请实施例还可以应用于各种类型和制式的通信系统，例如，5G通信系统、长期演进(Long Term Evolution，LTE)通信系统、NR、无线保真(wireless-fidelity，WiFi)、全球微波接入互操作(world interoperability for microwave access，WiMAX)、车到万物(vehicle to everything，V2X)、长期演进-车联网 (LTE-vehicle，LTE-V)、车到车(vehicle to vehicle，V2V)、车联网、机器类通信(Machine Type Communications，MTC)、物联网(internet of things，IoT)、长期演进-机器到机器(LTE-machine to machine，LTE-M)、机器到机器(machine to machine，M2M)、第三代合作伙伴计划(3rd generation partnership project，3GPP)相关的无线通信、或未来可能出现的其他无线通信等，本申请实施例不予限定。
目前，DMRS可用于估计数据信道(如PDSCH)或控制信道(如PDCCH)经历的等效信道，或者用于估计数据信道(如PDSCH)或控制信道(如PDCCH)经历的等效信道矩阵，从而用于数据的检测和解调。信道可以对经历的信号产生一定的加权或者是改变(例如，幅度的改变、相位的改变或者频率的改变等)。信道也可以称为信道响应，信道响应可以通过信道响应系数表示。
假设发送端发送的DMRS向量为s，发送的数据(或称数据符号)向量为x，DMRS与数据进行相同的预编码操作(乘以相同的预编码矩阵P)，经历相同的信道。这样，接收端在接收到数据向量对应的接收信号和DMRS向量对应的接收信号之后，可基于已知的DMRS向量s，利用信道估计算法获得对等效信道的估计。然后，接收端可基于等效信道可以完成MIMO均衡和解调。
DMRS用于估计等效信道，其维度为NR×R。其中，NR为接收天线数目，R为传输流数(rank，即数据流数或空间层数)。通常来说，一个DMRS端口(本申请中可简称为端口)与一个空间层对应。因此，对于传输流数为R的MIMO传输，需要的DMRS端口数目为R。
为了保证信道估计的质量，通常不同DMRS端口为正交端口，从而可以避免不同DMRS端口之间的干扰。不同DMRS端口为正交端口是指不同DMRS端口对应的DMRS在频域、时频或码域正交。对于一个DMRS端口，为了对不同的时频资源进行信道估计，保证信道估计质量，需要在多个时频资源内发送多个DMRS。DMRS在时域上可以占用至少1个OFDM符号，在频域上占用的带宽与调度的数据信号的调度带宽相同。一个端口对应的多个DMRS符号对应一个参考信号序列，一个参考信号序列包括多个参考信号序列元素。
一个端口对应的DMRS序列可通过预设的时频资源映射规则，与对应的掩码序列相乘后映射到对应的时频资源上。
对于端口p，其对应的DMRS序列中的第m个参考序列元素r(m)可按照如下规则映射至索引为(k,l)p,μ的资源粒子(resource element，RE)上。其中，索引为(k,l)p,μ的RE可在时域上对应一个时隙内的索引为l的OFDM符号，在频域上对应索引为k的子载波，映射规则满足：


k′＝0,1；

n＝0,1,...；
l′＝0,1。
其中，p为DMRS端口的索引，μ为子载波间隔参数，为映射至索引为(k,l)p,μ的RE上端口p对应的DMRS调制符号，为功率缩放因子，wt(l′)为索引为l’的OFDM符号对应的时域掩码元素，wf(k′)为索引为k’的子载波对应的频域掩码元素，m＝2n+k′，Δ为子载波偏移因子，为DMRS调制符号占用的起始OFDM符号的符号索引或参考OFDM符号的符号索引。其中，m的取值与配置类型有关。
下面分别介绍Type 1 DMRS和Type 2 DMRS的资源映射。
对于Type 1 DMRS：
Type 1 DMRS映射规则中，DMRS端口p对应的wf(k′)、wt(l′)及Δ的取值可以根据表1确定。
表1 Type 1 DMRS参数取值
其中，λ为端口p所属的码分复用(code division multiplexing，CDM)组(也可以称为正交复用组)的索引，同一正交复用组内的DMRS端口占用的时频资源相同。
根据式(1)，Type 1 DMRS的时频资源映射方式如图4所示。
对于单符号DMRS(对应l’＝0)，最大支持4端口，DMRS资源占据一个OFDM符号。4个DMRS端口分为2个码分复用组，其中CDM组0包含端口0和端口1；CDM组1包含端口2和端口3。CDM组0和CDM组1频分复用(即映射在不同的频域资源上)。CDM组内包含的DMRS端口映射在相同的时频资源上。CDM组内包含的DMRS端口对应的参考信号序列通过掩码序列进行区分，从而保证了CDM组内DMRS端口的正交性，进而抑制了不同天线端口上传输的DMRS之间的干扰。
具体地，端口0和端口1位于相同的RE内，在频域以梳齿的方式进行资源映射。即端口0和端口1占用的相邻的频域资源之间间隔一个子载波。对于一个DMRS端口，占用的相邻的2个RE对应一个长度为2的掩码序列。例如，对于子载波0和子载波2，端口0和端口1采用一组长度为2的掩码序列(+1+1和+1-1)。类似的，端口2和端口3位于相 同的RE内，在频域以梳齿的方式映射在端口0和端口1未占用的RE上。对于子载波1和子载波3，端口2和端口3采用一组长度为2的掩码序列(+1+1和+1-1)。
应理解，本申请表格中的p为端口索引，端口索引为1000的端口可以是端口0，端口索引为1001的端口可以是端口1，……，端口索引为100X的端口可以是端口X。
对于双符号DMRS(对应l’＝0或1)，最大支持8端口，DMRS资源占据两个OFDM符号。8个DMRS端口分为2个CDM组，其中CDM组0包含端口0、端口1、端口4和端口5；CDM组1包含端口2、端口3、端口6和端口7。CDM组0和CDM组1频分复用。CDM组内包含的DMRS端口映射在相同的时频资源上。CDM组内包含的DMRS端口对应的参考信号序列通过掩码序列进行区分。
具体地，端口0、端口1、端口4和端口5位于相同的RE内，在频域以梳齿的方式进行资源映射，即端口0、端口1、端口4和端口5占用的相邻的频域资源之间间隔一个子载波。对于一个DMRS端口，占用的相邻的2个子载波和2个OFDM符号对应一个长度为4的掩码序列。例如，对于OFDM符号1和OFDM符号2对应的子载波0和子载波2，端口0、端口1、端口4和端口5采用一组长度为4的掩码序列(+1+1+1+1/+1+1-1-1/+1-1+1-1/+1-1-1+1)。类似的，端口2、端口3、端口6和端口7位于相同的RE内，在频域以梳齿的方式映射在端口0、端口1、端口4和端口5未占用的子载波上。对于OFDM符号1和OFDM符号2对应的子载波1和子载波3，端口2、端口3、端口6和端口7采用一组长度为4的掩码序列(+1+1+1+1/+1+1-1-1/+1-1+1-1/+1-1-1+1)。
对于Type 2 DMRS：
Type 2 DMRS映射规则中DMRS端口p对应的wf(k′)、wt(l′)及Δ的取值可以根据表2确定。
表2 Type 2 DMRS端口参数取值
其中，λ为端口p所属的CDM组(也可以称为正交复用组)的索引，同一CDM组内的DMRS端口占用的时频资源相同。
根据式(1)，Type 2 DMRS时频资源映射方式如图5所示。
对于单符号DMRS，最大支持6端口，DMRS资源占据一个OFDM符号。6个DMRS端口分为3个CDM组，其中CDM组0包含端口0和端口1；CDM组1包含端口2和端口3；CDM组2包含端口4和端口5。CDM组间是频分复用，CDM组内包含的DMRS端口所对应的DMRS映射在相同的时频资源上。CDM组内包含的DMRS端口对应的参考信号序列通过掩码序列进行区分。对于一个DMRS端口，其对应的DMRS参考信号在频 域映射在多个包含连续2个子载波的资源子块内，相邻的资源子块之间在频域间隔4个子载波。
具体地，端口0和端口1位于相同的RE内，在频域以梳齿的方式进行资源映射。以频域资源粒度为1RB为例，端口0和端口1占用子载波0、子载波1、子载波6和子载波7。端口2和端口3占用子载波2、子载波3、子载波8和子载波9。端口4和端口5占用子载波4、子载波5、子载波10和子载波11。对于一个CDM组内包含的2个DMRS端口，其在相邻的2个子载波内对应长度为2的掩码序列(+1+1和+1-1)。
对于两符号DMRS，最大支持12端口，DMRS资源占据两个OFDM符号。12个DMRS端口分为3个CDM组，其中CDM组0包含端口0、端口1、端口6和端口7；CDM组1包含端口2、端口3、端口8和端口9；CDM组2包含端口4、端口5、端口10和端口11。CDM组间是频分复用，CDM组内包含的DMRS端口所对应的DMRS映射在相同的时频资源上。CDM组内包含的DMRS端口对应的参考信号序列通过掩码序列进行区分。对于一个DMRS端口，其对应的DMRS参考信号在频域映射在多个包含连续2个子载波的资源子块内，相邻的所述资源子块之间在频域间隔4个子载波。
具体地，端口0、端口1、端口6和端口7位于相同的RE内，在频域以梳齿的方式进行资源映射。以频域资源粒度为1RB为例，端口0、端口1、端口6和端口7占用OFDM符号1和OFDM符号2对应的子载波0、子载波1、子载波6和子载波7。端口2、端口3、端口8和端口9占用OFDM符号1和OFDM符号2对应的子载波2、子载波3、子载波8和子载波9。端口4、端口5、端口10和端口11占用OFDM符号1和OFDM符号2对应的子载波4、子载波5、子载波10和子载波11。对于一个CDM组内包含的4个DMRS端口，其在2个OFDM符号对应的相邻的2个子载波内对应长度为4的掩码序列(+1+1+1+1/+1+1-1-1/+1-1+1-1/+1-1-1+1)。
应理解，本申请表格中的p为端口索引，端口索引为1000的端口可以是端口0，端口索引为1001的端口可以是端口1，……，端口索引为100X的端口可以是端口X。
如上所述，目前NR中单符号DMRS最多能够支持6个DMRS端口，从而最多能支持6流的MIMO传输。而随着未来无线通信设备部署更加密集，终端设备数目进一步增长，对MIMO传输流数提出了更高的需求。此外，随着后续Massive MIMO系统的不断演进，收发天线数目将进一步增加(例如网络设备发送天线数目支持128T或256T，终端接收天线数目8R)，信道信息获取将更加精准，可以进一步支持更高的传输流数以提升MIMO系统的频谱效率。这势必需要更多的DMRS端口来支撑更高的传输流数(大于6流)。
由于不同DMRS端口依赖于频分复用、时分复用或者码分复用实现正交性，而时频资源和正交的码字集合是有限的。
一种可能的扩充现有正交DMRS端口数目的方法为：增加DMRS占用的时频资源。这种方法可以保证每个DMRS端口所对应的DMRS符号占用的资源数目不变。但是，随着端口数的增多，DMRS端口所需的资源数量也会增大，需要占用更多的时频资源，增加DMRS开销。并且，DMRS开销的增加也会降低系统的频谱效率。
另一种可能的方法是在保证相同时频资源(开销)的情况下，复用更多的非正交DMRS端口对应的DMRS符号。例如，设计与新增DMRS对应的低互相关的DMRS序列。其中，新增DMRS端口对应的序列和现有DMRS端口对应的序列保证低互相关性。然而非正交端口的叠加，势必会带来一定的干扰，导致系统性能(例如，信道估计能力)损失。
因此，如何引入新的DMRS端口，是需要解决的问题。
为了便于理解本申请，下面介绍附加DMRS(additional DMRS)。
考虑到不同时域符号之间的信道变化，NR标准引入了additional DMRS配置类型，用于跟踪信道变化，并减小残留频偏和相位噪声对信道估计能力的影响。为了便于与additional DMRS进行区分，图4和图5所示的DMRS配置可称为前置DMRS(front-loaded DMRS)配置。
图6A示出了additional DMRS的一种配置图样。该additional DMRS对应于图4左图所示的Type 1 DMRS。在图6A中，同一个时隙内可配置多个用于传输DMRS的符号，每个符号上的DMRS图样(DMRS pattern)和图4中左图所示的DMRS图样相同。其中，图4中左图所示的DMRS图样可为图6A中所示的图样中仅包含符号2(也可以称为第2个符号)的特例。
图6B示出了additional DMRS的另一种配置图样。该additional DMRS对应于图5左图所示的Type 2 DMRS。在图6B中，同一个时隙内可配置多个用于传输DMRS的符号，每个符号上的DMRS图样(DMRS pattern)和图5中左图所示的DMRS图样相同。其中，图5中左图所示的DMRS图样可为图6B中所示的图样中仅包含符号2(也可以称为第2个符号)的特例。
图6A和图6B仅以additional DMRS与单符号DMRS对应为例进行说明。应理解，additional DMRS也可以与图4或图5中的双符号DMRS对应。例如，additional DMRS的DMRS图样中，符号2和符号3的图样与图4中双符号DMRS的DMRS图样相同，符号10和符号11的图样也与图4中双符号DMRS的DMRS图样相同。又例如，additional DMRS的DMRS图样中，符号2和符号3的图样与图5中双符号DMRS的DMRS图样相同，符号10和符号11的图样也与图5中双符号DMRS的DMRS图样相同。
对于additional DMRS配置类型，一个端口对应的DMRS序列可通过预设的时频资源映射规则，与对应的掩码序列相乘后映射到对应的时频资源上。
对于端口p，其对应的DMRS序列中的第m个参考序列元素r(m)可按照如下规则映射至索引为(k,l)p,μ的资源粒子(resource element，RE)上。其中，索引为(k,l)p,μ的RE可在时域上对应一个时隙内的索引为l的OFDM符号，在频域上对应索引为k的子载波，映射规则满足：


k′＝0,1

n＝0,1,...
其中，各参数的含义可参考对公式(1)的说明。
对于单符号DMRS，的取值可如表3所示；对于双符号DMRS，的取值可如表4所示。
表3
表4
其中，ld为PDSCH的持续符号个数；为前置的DMRS位置，也可以称为前置DMRS配置中DMRS占用的起始OFDM的符号位置。对于pos0、pos1和pos2，l0的取值为2；对于pos3，l0的取值为3。pos0表示可有一个符号传输DMRS，pos1表示可有两个符号传输DMRS，pos2表示可有三个符号传输DMRS，pos3表示可有四个符号传输DMRS。例如，在表3中，当ld为10时，对于PDSCH映射类型A中的pos1，的取值可为l0以及l0+9；即可在符号l0和符号l0+9上传输DMRS。
在本申请中，前置DMRS配置中DMRS占用的符号为前置DMRS符号(即front-loaded符号)；additional DMRS配置图样中除前置DMRS符号之外的用于传输DMRS的符号为 additional DMRS符号。
目前，additional DMR并未用于提升DMRS端口数，而是仅通过不同OFDM符号重复传输DMRS来保证高速移动情况(例如，终端设备的速度大于设定的速度阈值)中的信道估计能力。
下面结合附图对本申请提供的方案进行说明。
本申请实施例提供了一种通信方法，该方法应用于图1所示的通信系统中，由网络设备或终端设备执行。下面参阅图7所示的流程图，对该方法的流程进行具体说明。其中，发送设备可以为网络设备，接收设备可以为终端设备；或者发送设备可以为终端设备，接收设备可以为网络设备。参考信号包括但不限于DMRS，下文中在描述时主要以参考信号是DMRS为例进行说明，根据实际需求可将DMRS替换为其他类型的参考信号。
如图7所示，本申请实施例提供的通信方法可包括以下步骤：
S701：发送设备获取第一端口对应的参考信号。
其中，第一端口属于第一端口集合或第二端口集合。其中，第一端口集合中的端口可为现有的端口，例如，图4中的端口0和端口1。第二端口集合中的端口可为新增的端口。
可选的，第一端口集合和第二端口集合为不同的CDM组。例如，对于单符号Type 1 DMRS，第一端口集合可以为CDM组0或CDM组1；对于单符号Type 2 DMRS，第一端口集合可以为CDM组0、CDM组1或CDM组2。第二端口集合可以为CDM组3或CDM组4或CDM组5。对于单符号Type 1 DMRS，CDM组3可以包括端口8和端口9，CDM组4可包括端口10和端口11；对于单符号Type 2 DMRS，CDM组3可以包括端口12和端口13，CDM组4可包括端口14和端口15，CDM组5可包括端口16和端口17。
S702：发送设备通过第一资源和第二资源发送第一端口对应的参考信号。相应的，接收设备通过第一资源和第二资源接收第一端口对应的参考信号。
其中，第一资源可位于第一OFDM符号，第二资源可位于第二OFDM符号，第一OFDM符号和第二OFDM符号不相邻。换句话说，第一资源和第二资源在时域上不相邻。例如，第一资源和第二资源分别位于同一时隙中的符号2和符号11。第一资源为符号2中的RE1和RE3，第二资源为符号11中的RE1和RE3。
另外，第一端口集合中的端口对应的参考信号可在第一资源和第二资源上与第一掩码对应，第二端口集合中的端口对应的参考信号可在第一资源和第二资源上与第二掩码对应，第一掩码和第二掩码不同。也就是说，第一端口集合中的端口可通过时分正交掩码(time division orthogonal cover code，TD-OCC)的方式与第二端口集合中的端口在同样的时频资源上进行复用。具体内容可参考下文中的方式A1、方式B1、方式C1和方式D1中的任一种，此处暂不展开。
通过该方法，发送设备可通过不相邻的多个OFDM符号上的资源传输参考信号；并且，第一端口集合中端口对应的参考信号在该多个OFDM符号上的资源对应第一掩码，第一端口集合中端口对应的参考信号在该多个OFDM符号上的资源对应第二掩码，第一掩码和第二掩码不同，从而可通过不相邻的多个OFDM符号扩展端口数，进而可支持更多的传输流数。
可选的，在一种可能的实现方式中，第一OFDM符号为前置DMRS符号，第二OFDM 符号为附加DMRS符号。前置DMRS符号和附加DMRS符号的具体内容可参考下文的情况1-情况4，此处再不展开。
该方法通过已有的附加DMRS符号来增加DMRS端口数，从而可在额外占用资源的情况下，提高DMRS端口数，支持更多的传输流数。并且，通过该方法，对现有DMRS端口配置改动较小，且不会损失信道估计的性能。
而且，由于第一端口集合中的端口可通过TD-OCC的方式与因additional DMRS符号新增的第二端口集合中的端口在同样的时频资源上进行复用，因此，对于additional DMRS，可通过端口配置来灵活支持更多的复用方式，例如，重复传输DMRS或通过TD-OCC的方式区分端口的DMRS。
可选的，在一种可能的实现方式中，当发送设备为终端设备时，在S702之前，上述方法还包括：
O1：网络设备向终端设备发送第一指示信息。相应的，终端设备接收来自网络设备的第一指示信息。
其中，第一指示信息可用于指示通过第一方式发送第一端口对应的参考信号。其中，第一方式为通过第一资源和第二资源发送第一端口的参考信号，即通过S702的方式发送第一端口的参考信号。
可选的，该第一指示信息可通过消息发送(例如，RRC消息)，也可承载在控制信息(例如，下行控制信息(downlink control information，DCI))中。
另外，该第一指示信息可直接指示通过第一方式发送第一端口对应的参考信号。例如，当第一指示信息为第一值时，可指示通过第一方式发送第一端口对应的参考信号。该第一指示信息也可以间接指示通过第一方式发送第一端口对应的参考信号。例如，第一指示信息包含第一端口索引，第一端口索引用于指示第一方式；示例性的，端口H的参考信号专用于通过第一方式传输时，端口H的端口索引可为第一端口索引，其中，H为非负整数。
可选的，当满足以下条件至少一项时，网络设备可确定需要第一方式发送第一端口的参考信号，并向终端设备发送第一指示信息。
条件1、终端设备的移动速度低于第一速度阈值。例如，网络设备可获取终端设备的在时刻1和时刻2的定时提前量(time advance，TA)和来波方向(angle of arrival，AoA)。通过终端设备的TA，网络设备可确定终端设备相对于AN设备的距离；通过AoA，网络设备可确定终端设备相对于AN设备的方向。因此，网络设备可确定终端设备在时刻1的位置1和在时刻2的位置2。然后，网络设备可确定终端设备的移动速度为(位置2-位置1)/(时刻2-时刻1)。进而网络设备可确定是否满足条件1。
条件2、终端设备的信道质量的变化小于第一信道质量阈值。例如，网络设备可对终端设备的信道进行估计，从而确定终端设备在时刻3的信道质量1和时刻4的信道质量2，当信道质量2与信道质量1的差值小于第一信道质量阈值时，网络设备可确定是否满足条件2。
条件3、用于传输DMRS的资源位于边缘子带。例如，网络设备可根据对边缘子带的解释确定是否满足条件3。
条件4、终端设备需要的总端口数大于目前NR能够支持的端口数。例如，对于Type 1DMRS，当终端设备需要传输的数据流数超过8时，需要的总端口数也大于8，从而超出 目前NR能够支持的端口数，满足条件4。又例如，对于Type 2 DMRS，当终端设备需要传输的数据流数超过12时，需要的总端口数也大于12，从而超出目前NR能够支持的端口数，满足条件4。
通过该方法，终端设备可在网络设备的指示下，采用第一方式传输第一端口对应的参考信号。这样，网络设备可灵活配置终端设备发送参考信号的方式(也可称为DMRS端口复用方式)，从而适配不同场景下的DMRS信道估计能力。
可选的，在一种可能的实现方式中，当发送设备为终端设备时，上述方法还包括步骤P1-步骤P2：
P1：网络设备向终端设备发送第二指示信息。相应的，终端设备接收来自网络设备的第二指示信息。其中，第二指示信息可用于指示终端设备通过第二方式发送第一端口对应的参考信号。
其中，第二方式为：终端设备通过第三资源和第四资源发送第一端口的参考信号。其中，第三资源和第四资源位于不同的频域资源上。例如，第三资源为符号2中的RE1和RE3，第四资源为符号2中的RE5和RE7。
另外，第一端口集合中的端口对应的参考信号可在第三资源和第四资源上与第三掩码对应，第二端口集合中的端口对应的参考信号在第三资源和第四资源上与第四掩码对应，第三掩码和第四掩码不同。具体内容可参考下文中的方式A2，此处暂不展开。
可选的，该第二指示信息可通过消息发送(例如，RRC消息)，也可承载在控制信息(例如，DCI)中。该第二指示信息可直接指示通过第二方式发送第一端口对应的参考信号。例如，当第二指示信息为第二值时，可指示通过第二方式发送第一端口对应的参考信号。该第二指示信息也可以间接指示通过第二方式发送第一端口对应的参考信号。例如，第二指示信息包含第二端口索引，第二端口索引用于指示第二方式；示例性的，端口I的参考信号专用于通过第二方式传输时，端口I的端口索引可为第二端口索引，其中，I为非负整数。
可选的，当满足以下条件至少一项时，网络设备可确定需要第二方式发送第一端口的参考信号，并向终端设备发送第二指示信息。
条件一、终端设备的移动速度大于第二速度阈值。例如，网络设备可通过与条件1类似的方式获取终端设备的移动速度，从而判断是否满足条件一。
条件二、终端设备的信道时延扩展小于时延扩展阈值。例如，网络设备可通过信道估计获取终端设备的信道时延扩展，从而确定是否满足条件二。
条件三、用于传输DMRS的资源位于非边缘子带。例如，网络设备可根据边缘子带的解释来确定是否满足条件三。
条件四、终端设备需要的总端口数大于目前NR能够支持的端口数。具体内容可参考上述条件4，此处不再赘述。
P2：终端设备通过第三资源和第四资源发送第一端口对应的参考信号。相应的，网络设备通过第三资源和第四资源接收第一端口对应的参考信号。
通过该方法，终端设备可在网络设备的指示下，采用第二方式传输第一端口对应的参考信号。这样，网络设备可灵活配置终端设备发送参考信号的方式，从而适配不同场景下的DMRS信道估计能力。
可选的，在一种可能的实现方式中，当发送设备为终端设备时，上述方法还包括步骤Q1-步骤Q2：
Q1：网络设备向终端设备发送第三指示信息。相应的，终端设备接收来自网络设备的第三指示信息。其中，第三指示信息用于指示通过第三方式发送第一端口对应的参考信号。
其中，第三方式为：当第一端口属于第一端口集合时，通过第五资源发送第一端口对应的参考信号；当第一端口属于第二端口集合时，通过第六资源发送第一端口对应的参考信号。其中，第五资源和第六资源位于不同的频域资源上；例如，第五资源为符号2中的RE1和RE5，第六资源为符号2中的RE3和RE7。具体内容可参考下文的方式A5，此处暂不展开。
可选的，该第三指示信息可通过消息发送(例如，RRC消息)，也可承载在控制信息(例如，DCI)中。该第三指示信息可直接指示通过第三方式发送第一端口对应的参考信号。例如，当第三指示信息为第三值时，可指示通过第三方式发送第一端口对应的参考信号。该第三指示信息也可以间接指示通过第三方式发送第一端口对应的参考信号。例如，第三指示信息包含第三端口索引，第三端口索引用于指示第三方式；示例性的，端口Z的参考信号专用于通过第三方式传输时，端口Z的端口索引可为第三端口索引，其中，Z为非负整数。
可选的，当满足上述条件一-条件四任一项时，网络设备可确定需要第三方式发送第一端口的参考信号，并向终端设备发送第三指示信息。
Q2：终端设备通过第五资源或第六资源发送第一端口对应的参考信号。相应的，网络设备通过第五资源或第六资源接收第一端口对应的参考信号。
通过该方法，终端设备可在网络设备的指示下，采用第三方式传输第一端口对应的参考信号。这样，网络设备可灵活配置终端设备发送参考信号的方式，从而适配不同场景下的DMRS信道估计能力。
应理解，在本申请中，O1、P1-P2以及Q1-Q2可结合使用。
例如，当O1和P1-P2结合时，网络设备可指示终端设备通过第一方式和第二方式发送第一端口对应的参考信号。此时，第一端口对应的参考信号在各资源上对应的掩码可参考下文中的方式A3、方式B2、方式C2和方式D2，此处暂不展开。另外，当满足上述条件1-条件4、以及条件一-条件四任一项时，网络设备可确定通过第一方式和第二方式发送第一端口对应的参考信号。示例性的，当用于传输DMRS的资源位于边缘子带时，网络设备可确定通过第一方式和第二方式发送第一端口对应的参考信号。
又例如，当O1和Q1-Q2结合时，网络设备可指示终端设备通过第一方式和第三方式发送第一端口对应的参考信号；此时，第一端口对应的参考信号在各资源上对应的掩码可参考下文中的方式A4，此处暂不展开。另外，当满足上述条件1-条件4、以及条件一-条件四任一项时，网络设备可确定通过第一方式和第三方式发送第一端口对应的参考信号。
可选的，在一种可能的实现方式中，第一端口对应的参考信号的序列中的元素与第一资源中的RE一一对应，第一端口对应的参考信号的序列中的元素与第二资源中的RE一一对应。
其中，第一端口对应的参考信号的序列包括的元素个数可为以下之一：2、4、6、8、 12。
例如，端口0对应的参考信号1的序列包括2个元素，分别为元素1和元素2，第一资源为符号2中的RE1和RE3，第二资源为符号11中的RE1和RE3。元素1和元素2可分别映射至符号2中的RE1和RE3中，元素1和元素2可分别映射至符号11中的RE1和RE3中。端口8对应的参考信号2的序列包括2个元素，分别为元素3和元素4。元素3和元素4可分别映射至符号2中的RE1和RE3中，元素3和元素4可分别映射至符号11中的RE1和RE3中。参考信号1在第一资源和第二资源上分别对应掩码{+1,+1}(即第一掩码)，参考信号2在第一资源和第二资源上分别对应掩码{+1,-1}(即第二掩码)。
通过该方法，第一端口集合和第二端口集合中端口对应的参考信号均可重复映射至第一资源和第二资源，并且，第一端口集合中端口对应的参考信号在该多个OFDM符号上的资源对应第一掩码，第一端口集合中端口对应的参考信号在该多个OFDM符号上的资源对应第二掩码，第一掩码和第二掩码不同，从而可通过不相邻的多个OFDM符号扩展端口数，进而可支持更多的传输流数。
本申请可针对不同的DMRS配置类型和符号数对端口对应的DMRS进行区分，从而可扩展端口数。下面分别针对情况1-情况4说明如何对端口对应的DMRS进行区分。
情况1：在front-loaded单符号Type 1 DMRS的基础上增加1组additional DMRS符号。
图8示出了情况1的时频资源映射方法。如图8所示，在现有4个端口(即端口0-端口3)的基础上，可新增4个端口；新增4个端口的端口索引可为8-11。现有端口对应的DMRS和新增端口对应的DMRS均可映射到符号2(即front-loaded符号)和符号11(即additional DMRS符号)对应的RE上。
下面以端口0、端口1、端口8和端口9为例，说明如何对端口对应的DMRS进行区分。
第一端口集合包括端口0和端口1，第二端口集合包括端口8和端口9。第一端口集合对应的DMRS和第二端口集合对应的DMRS可通过相同的资源传输。在本申请中，可通过如下方式之一来对端口对应的DMRS进行区分。
方式A1：通过TD-OCC对端口对应的DMRS进行区分。
在该方式A1中，第一端口集合中的端口和第二端口集合中的端口对应不同的时域OCC，从而可以区分第一端口集合中端口对应的DMRS和第二端口集合中端口对应的DMRS。另外，第一端口集合中的端口对应不同的频域OCC，第二端口集合中的端口对应不同的频域OCC，从而可在第一端口集合和第二端口集合内部区分不同端口对应的DMRS。
表5A示出了方式A1中各端口对应的DMRS序列在各资源上对应的掩码元素的一个示例。如表5A所示，对于现有的端口0和端口1，其对应的DMRS序列不改变，在符号2和符号11上分别对应时域OCC{+1,+1}；对于新增的端口8，其对应的DMRS序列在符号2上与现有端口0相同，在符号2和符号11上分别对应时域OCC{+1，-1}；对于新增的端口9，其对应的DMRS序列在符号2上与现有端口1相同，在符号2和符号11上分别对应时域OCC{+1，-1}。这样，新增端口对应的DMRS与现有端口对应的DMRS可通过2长的时域OCC进行区分，实现码域正交。
表5A
在方式A1中，对于端口2、端口3、端口10和端口11，也可采用与端口0、端口1、端口8和端口9类似的方式对端口对应的DMRS进行区分。例如，各端口对应的DMRS序列在各资源上对应的掩码元素可如表5B所示。
表5B
通过该方式，可在不同时域符号上通过TD-OCC的方式实现码分正交来区分不同端口对应的DMRS，从而联合时域上的多个符号进行DMRS端口的扩容，即增加DMRS端口的数量。
方式A2：通过频分正交掩码(time division orthogonal cover code，FD-OCC)对端口对应的DMRS进行区分。
在该方式A2中，第一端口集合中的端口和第二端口集合中的端口对应不同的频域OCC，从而可以区分第一端口集合中端口对应的DMRS和第二端口集合中端口对应的DMRS。另外，第一端口集合中的端口对应不同的频域OCC，第二端口集合中的端口对应不同的频域OCC，从而可在第一端口集合和第二端口集合内部区分不同端口对应的DMRS。
表6A示出了方式A2中各端口对应的DMRS序列在各资源上对应的掩码元素的一个 示例。如表6A所示，在符号2和符号11中，现有的端口0在子载波1、子载波3、子载波5和子载波7上分别对应频域OCC{+1,+1,+1,+1}；现有的端口1在子载波1、子载波3、子载波5和子载波7上分别对应频域OCC{+1,-1,+1,-1}；新增的端口8在子载波1、子载波3、子载波5和子载波7上分别对应频域OCC{+1,+1,-1,-1}；新增的端口9在子载波1、子载波3、子载波5和子载波7上分别对应频域OCC{+1,-1,-1,+1}。这样，新增端口对应的DMRS与现有端口对应的DMRS可通过4长的频域OCC进行区分，实现码域正交。
表6A
在方式A2中，对于端口2、端口3、端口10和端口11，也可采用与端口0、端口1、端口8和端口9类似的方式对端口对应的DMRS进行区分。例如，各端口对应的DMRS序列在各资源上对应的掩码元素可如表6B所示。
表6B
通过该方式，在不同的频域资源上可通过FD-OCC的方式实现码分正交来区分不同端口对应的DMRS，从而可增加DMRS端口的数量。
方式A3：通过FD-OCC和TD-OCC对端口对应的DMRS进行区分。
在该方式A3中，第一端口集合中的端口和第二端口集合中的端口对应不同的时域OCC，且第一端口集合中的端口和第二端口集合中的端口对应不同的频域OCC，从而可以 区分第一端口集合中端口对应的DMRS和第二端口集合中端口对应的DMRS。另外，第一端口集合中的端口对应不同的频域OCC，第二端口集合中的端口对应不同的频域OCC，从而可在第一端口集合和第二端口集合内部区分不同端口对应的DMRS。
表7A示出了方式A3中各端口对应的DMRS序列在各资源上对应的掩码元素的一个示例。如表7A所示，在符号2中，现有的端口0在子载波1、子载波3、子载波5和子载波7上分别对应频域OCC{+1,+1,+1,+1}；现有的端口1在子载波1、子载波3、子载波5和子载波7上分别对应频域OCC{+1,-1,+1,-1}；新增的端口8在子载波1、子载波3、子载波5和子载波7上分别对应频域OCC{+1,+1,-1,-1}；新增的端口9在子载波1、子载波3、子载波5和子载波7上分别对应频域OCC{+1,-1,-1,+1}。
现有的端口0在符号2和符号11上分别对应时域OCC{+1,+1}；现有的端口1在符号2和符号11上分别对应时域OCC{+1,+1}；新增的端口8在符号2和符号11上分别对应时域OCC{+1,-1}；新增的端口9在符号2和符号11上分别对应时域OCC{+1,-1}。
这样，新增端口对应的DMRS与现有端口对应的DMRS可通过2长的时域OCC和4长的频域OCC进行区分，实现码域正交。
表7A
在方式A3中，对于端口2、端口3、端口10和端口11，也可采用与端口0、端口1、端口8和端口9类似的方式对端口对应的DMRS进行区分。例如，各端口对应的DMRS序列在各资源上对应的掩码元素可如表7B所示。
表7B

通过该方式，可联合频域OCC和时域OCC区分新增端口对应的DMRS和现有端口对应的DMRS，从而在增加DMRS端口的数量的同时，增强新增端口和现有端口间的干扰抑制能力，提高信道估计性能，获得更大的多用户(multiple user，MU)配对增益。
方式A4：通过频分循环移位(time division cyclic shift，FD-CS)和TD-OCC对端口对应的DMRS进行区分。
在该方式A4中，第一端口集合中的端口和第二端口集合中的端口对应不同的时域OCC，且第一端口集合中的端口和第二端口集合中的端口对应的掩码序列是正交的，从而可以区分第一端口集合中端口对应的DMRS和第二端口集合中端口对应的DMRS。另外，第一端口集合中的端口对应不同的频域OCC，第二端口集合中的端口对应不同的频域OCC，从而可在第一端口集合和第二端口集合内部区分不同端口对应的DMRS。
表8A示出了方式A4中各端口对应的DMRS序列在各资源上对应的掩码元素的一个示例。
如表8A所示，在符号2中，现有的端口0在子载波1、子载波3、子载波5和子载波7上分别对应频域掩码元素{+1,+1,+1,+1}；现有的端口1在子载波1、子载波3、子载波5和子载波7上分别对应频域掩码元素{+1,-1,+1,-1}；新增的端口8在子载波1、子载波3、子载波5和子载波7上分别对应频域掩码元素{+1,+j,-1,-j}；新增的端口9在子载波1、子载波3、子载波5和子载波7上分别对应频域掩码元素{+1,-j,-1,+j}。
现有的端口0在符号2和符号11上分别对应时域OCC{+1,+1}；现有的端口1在符号2和符号11上分别对应时域OCC{+1,+1}；新增的端口8在符号2和符号11上分别对应时域OCC{+1,-1}；新增的端口9在符号2和符号11上分别对应时域OCC{+1,-1}。
这样，新增端口对应的DMRS与现有端口对应的DMRS可通过4长的频域掩码序列和2长的时域OCC进行区分，实现码域正交。
表8A
在方式A4中，对于端口2、端口3、端口10和端口11，也可采用与端口0、端口1、 端口8和端口9类似的方式对端口对应的DMRS进行区分。例如，各端口对应的DMRS序列在各资源上对应的掩码元素可如表8B所示。
表8B
通过该方式，可联合频域掩码序列和时域OCC区分新增端口对应的DMRS和现有端口对应的DMRS，从而在增加DMRS端口的数量的同时，增强新增端口和现有端口间的干扰抑制能力，提高信道估计性能，获得更大的多用户(multiple user，MU)配对增益。
方式A5：通过FDM对端口对应的DMRS进行区分。
在该方式A5中，第一端口集合中的端口和第二端口集合中的端口对应不同频域上的子载波，从而可以区分第一端口集合中端口对应的DMRS和第二端口集合中端口对应的DMRS。另外，第一端口集合中的端口对应不同的频域OCC，第二端口集合中的端口对应不同的频域OCC，从而可在第一端口集合和第二端口集合内部区分不同端口对应的DMRS。
表9A示出了方式A5中各端口对应的DMRS序列在各资源上对应的掩码元素的一个示例。在符号2和符号11中，现有的端口0和1对应的DMRS可映射至子载波1和子载波5上，新增的端口8和端口9对应的DMRS可映射至子载波3和子载波7上。这样，新增端口对应的DMRS可与现有端口对应的DMRS进行频分复用，实现频域正交。
表9A

在方式A5中，对于端口2、端口3、端口10和端口11，也可采用与端口0、端口1、端口8和端口9类似的方式对端口对应的DMRS进行区分。例如，各端口对应的DMRS序列在各资源上对应的掩码元素可如表9B所示。
表9B
通过该方式，在不同的频域资源上可通过频分的方式来区分不同端口对应的DMRS，从而可增加DMRS端口的数量。
情况2：在front-loaded双符号Type 1 DMRS的基础上增加1组additional DMRS符号。
图9示出了情况2中的时频资源映射方法。如图9所示，在现有8个端口(即端口0-端口7)的基础上，可新增8个端口；新增8个端口的端口索引可为8-15。现有端口和新增端口均可映射到符号2、符号3、符号10和符号11对应的RE上；其中，符号2和符号3为front-loaded符号，符号10和符号11为additional DMRS符号。
下面以端口0、端口1、端口4、端口5、端口8、端口9、端口12和端口13为例，说明如何对端口对应的DMRS进行区分。
第一端口集合包括端口0、端口1、端口4和端口5，第二端口集合包括端口8、端口9、端口12和端口13。第一端口集合对应的DMRS和第二端口集合对应的DMRS可通过相同的资源传输。对于情况2，可通过与上述方式A1-方式A5中任一方式类似的方式来对端口对应的DMRS进行区分，下面对其中的部分方式进行具体说明。
方式B1：通过TD-OCC对端口对应的DMRS进行区分。
该方式B1与上述方式A1类似，第一端口集合中的端口和第二端口集合中的端口对应不同的时域OCC。例如，对于现有的端口0、端口1、端口4和端口5，其对应的DMRS序列不改变，在front-loaded符号和additional DMRS符号上分别对应时域OCC{+1,+1}；对于新增的端口8、端口9、端口12和端口13，其对应的DMRS序列在front-loaded符号上分别与现有端口0、端口1、端口4和端口5相同，在front-loaded符号和additional DMRS符号上分别对应时域OCC{+1，-1}。这样，新增端口对应的DMRS可与现有端口对应的DMRS进行码分复用，实现码域正交。
方式B2：通过FD-OCC和TD-OCC对端口对应的DMRS进行区分。
该方式B2与上述方式A3类似，第一端口集合中的端口和第二端口集合中的端口对应不同的时域OCC，且第一端口集合中的端口和第二端口集合中的端口对应不同的频域OCC。
表10A示出了方式B2中各端口对应的DMRS序列在各资源上对应的掩码元素的一个示例。如表10A所示，在符号2中，现有的端口0在子载波1、子载波3上分别对应频域OCC{+1,+1}；现有的端口1在子载波1、子载波3上分别对应频域OCC{+1,-1}；现有的端口4在子载波1、子载波3上分别对应频域OCC{+1,+1}；现有的端口5在子载波1、子载波3上分别对应频域OCC{+1,-1}；新增的端口8在子载波1、子载波3上分别对应频域OCC{+1,+1}；新增的端口9在子载波1、子载波3上分别对应频域OCC{+1,-1}；新增的端口12在子载波1、子载波3上分别对应频域OCC{+1,+1}；新增的端口13在子载波1、子载波3上分别对应频域OCC{+1,-1}。
现有的端口0在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,+1,+1,+1}；现有的端口1在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,+1,+1,+1}；现有的端口4在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,-1,+1,-1}；现有的端口5在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,-1,+1,-1}；新增的端口8在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,+1,-1,-1}；新增的端口9在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,+1,-1,-1}；新增的端口12在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,+1,-1,+1}；新增的端口13在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,+1,-1,+1}。
这样，新增端口对应的DMRS与现有端口对应的DMRS可通过2长的频域OCC和4长的时域OCC进行区分，实现码域正交。
表10A
另外，对于端口2、端口3、端口6、端口7、端口10、端口11、端口14和端口15，也可采用与端口0、端口1、端口4、端口5、端口8、端口9、端口12和端口13类似的方式对端口对应的DMRS进行区分。例如，各端口对应的DMRS序列在各资源上对应的掩码元素可如表10B所示。
表10B
表11A示出了方式B2中各端口对应的DMRS序列在各资源上对应的掩码元素的另一个示例。如表11A所示，在符号2中，现有的端口0在子载波1、子载波3、子载波5和子载波7上分别对应频域OCC{+1,+1,+1,+1}；现有的端口1在子载波1、子载波3、子载波5和子载波7上分别对应频域OCC{+1,-1,+1,-1}；现有的端口4在子载波1、子载波3、子载波5和子载波7上分别对应频域OCC{+1,+1,+1,+1}；现有的端口5在子载波1、子载波3、子载波5和子载波7上分别对应频域OCC{+1,-1,+1,-1}；新增的端口8在子载波1、子载波3、子载波5和子载波7上分别对应频域OCC{+1,+1,-1,-1}；新增的端口9在子载波1、子载波3、子载波5和子载波7上分别对应频域OCC{+1,-1,-1,+1}；新增的端口12在子载波1、子载波3、子载波5和子载波7上分别对应频域OCC{+1,+1,-1,-1}；新增的端口13在子载波1、子载波3、子载波5和子载波7上分别对应频域OCC{+1,-1,-1,+1}。
现有的端口0在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,+1,+1,+1}；现有的端口1在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,+1,+1,+1}；现有的端口4在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,-1,+1,-1}；现有的端口5在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,-1,+1,-1}；新增的端口8在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,+1,-1,-1}；新增的端口9在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,+1,-1,-1}；新增的端口12在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,-1,-1,+1}；新增的端口13在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,-1,-1,+1}。
这样，新增端口对应的DMRS与现有端口对应的DMRS可通过4长的频域OCC和4长的时域OCC进行区分，实现码域正交。
表11A

另外，对于端口2、端口3、端口6、端口7、端口10、端口11、端口14和端口15，也可采用与端口0、端口1、端口4、端口5、端口8、端口9、端口12和端口13类似的方式对端口对应的DMRS进行区分。例如，各端口对应的DMRS序列在各资源上对应的掩码元素可如表11B所示。
表11B
情况3：在front-loaded单符号Type 2 DMRS的基础上增加1组additional DMRS符号。
图10示出了情况3中的时频资源映射方法。如图10所示，在现有6个端口(即端口0-端口5)的基础上，可新增6个端口；新增6个端口的端口索引可为12-17。现有端口和新增端口均可映射到符号2(即front-loaded符号)和符号11(即additional DMRS符号)对应的RE上。
下面以端口0、端口1、端口12和端口13为例，说明如何对端口对应的DMRS进行区分。
第一端口集合包括端口0和端口1，第二端口集合包括端口12和端口13。第一端口集合对应的DMRS和第二端口集合对应的DMRS可通过相同的资源传输。对于情况3，可通过与上述方式A1-方式A5中任一方式类似的方式来对端口对应的DMRS进行区分，下面对其中的部分方式进行具体说明。
方式C1：通过TD-OCC对端口对应的DMRS进行区分。
该方式C1与上述方式A1类似，第一端口集合中的端口和第二端口集合中的端口对应不同的时域OCC。
表12A示出了方式C1中各端口对应的DMRS序列在各资源上对应的掩码元素的一个示例。如表12A
所示，对于现有的端口0和端口1，其对应的DMRS序列不改变，在符号2和符号11上分别对应时域OCC{+1,+1}；对于新增的端口12，其对应的DMRS序列在符号2上与现有端口0相同，在符号2和符号11上分别对应时域OCC{+1,-1}；对于新增的端口13，其对应的DMRS序列在符号2上与现有端口1相同，在符号2和符号11上分别对应时域OCC{+1,-1}。这样，新增端口对应的DMRS与现有端口对应的DMRS可通过2长的时域OCC进行区分，实现码域正交。通过该方式，可增加DMRS端口的数量。
表12A
在方式C1中，对于端口2、端口3、端口14和端口15，也可采用与端口0、端口1、端口12和端口13类似的方式对端口对应的DMRS进行区分。例如，各端口对应的DMRS序列在各资源上对应的掩码元素可如表12B所示。
表12B
在方式C1中，对于端口4、端口5、端口16和端口17，也可采用与端口0、端口1、端口12和端口13类似的方式对端口对应的DMRS进行区分。例如，各端口对应的DMRS序列在各资源上对应的掩码元素可如表12C所示。
表12C
方式C2：通过FD-OCC和TD-OCC对端口对应的DMRS进行区分。
该方式C2与上述方式A3类似，第一端口集合中的端口和第二端口集合中的端口对应不同的时域OCC，且第一端口集合中的端口和第二端口集合中的端口对应不同的频域OCC。
表13A示出了方式C2中各端口对应的DMRS序列在各资源上对应的掩码元素的一个示例。如表13A所示，在符号2中，现有的端口0在子载波1、子载波2、子载波7和子载波8上分别对应频域OCC{+1,+1,+1,+1}；现有的端口1在子载波1、子载波2、子载波7和子载波8上分别对应频域OCC{+1,-1,+1,-1}；新增的端口12在子载波1、子载波2、 子载波7和子载波8上分别对应频域OCC{+1,+1,-1,-1}；新增的端口13在子载波1、子载波2、子载波7和子载波8上分别对应频域OCC{+1,-1,-1,+1}。
现有的端口0在符号2和符号11上分别对应时域OCC{+1,+1}；现有的端口1在符号2和符号11上分别对应时域OCC{+1,+1}；新增的端口12在符号2和符号11上分别对应时域OCC{+1,-1}；新增的端口13在符号2和符号11上分别对应时域OCC{+1,-1}。
这样，新增端口对应的DMRS与现有端口对应的DMRS可通过4长的频域OCC和2长的时域OCC进行区分，实现码域正交。
表13A
在方式C2中，对于端口2、端口3、端口14和端口15，也可采用与端口0、端口1、端口12和端口13类似的方式对端口对应的DMRS进行区分。例如，各端口对应的DMRS序列在各资源上对应的掩码元素可如表13B所示。
表13B
在方式C2中，对于端口4、端口5、端口16和端口17，也可采用与端口0、端口1、端口12和端口13类似的方式对端口对应的DMRS进行区分。例如，各端口对应的DMRS序列在各资源上对应的掩码元素可如表13C所示。
表13C
情况4：在front-loaded双符号Type 2 DMRS的基础上增加1组additional DMRS符号。
图11示出了情况4中的时频资源映射方法。如图11所示，在现有12个端口(即端口0-端口11)的基础上，可新增12个端口；新增12个端口的端口索引可为12-23。现有端口和新增端口均可映射到符号2、符号3、符号10和符号11对应的RE上；其中，符号2和符号3为front-loaded符号，符号10和符号11为additional DMRS符号。
下面以端口0、端口1、端口6、端口7、端口12、端口13、端口18和端口19为例，说明如何实现现有端口对应的DMRS和新增端口对应的DMRS之间的正交。
第一端口集合包括端口0、端口1、端口6和端口7，第二端口集合包括端口12、端 口13、端口18和端口19。第一端口集合对应的DMRS和第二端口集合对应的DMRS可通过相同的资源传输。对于情况4，可通过与上述方式A1-方式A5中任一方式类似的方式来对端口对应的DMRS进行区分，下面对其中的部分方式进行具体说明。
方式D1：通过TD-OCC对端口对应的DMRS进行区分。
该方式D1与上述方式A1类似，第一端口集合中的端口和第二端口集合中的端口对应不同的时域OCC。例如，对于现有的端口0、端口1、端口6和端口7，其对应的DMRS序列不改变，在front-loaded符号和additional DMRS符号上分别对应时域OCC{+1,+1}；对于新增的端口12、端口13、端口18和端口19，其对应的DMRS序列在front-loaded符号上分别与现有端口0、端口1、端口6和端口7相同，在front-loaded符号和additional DMRS符号上分别对应时域OCC{+1，-1}。这样，新增端口对应的DMRS可与现有端口对应的DMRS进行码分复用，实现码域正交。
方式D2：通过FD-OCC和TD-OCC对端口对应的DMRS进行区分。
该方式D2与上述方式A3类似，第一端口集合中的端口和第二端口集合中的端口对应不同的时域OCC，且第一端口集合中的端口和第二端口集合中的端口对应不同的频域OCC。
表14A示出了方式D2中各端口对应的DMRS序列在各资源上对应的掩码元素的一个示例。如表14A所示，在符号2中，现有的端口0在子载波1、子载波2上分别对应频域OCC{+1,+1}；现有的端口1在子载波1、子载波2上分别对应频域OCC{+1,-1}；现有的端口6在子载波1、子载波2上分别对应频域OCC{+1,+1}；现有的端口7在子载波1、子载波2上分别对应频域OCC{+1,-1}；新增的端口12在子载波1、子载波2上分别对应频域OCC{+1,+1}；新增的端口13在子载波1、子载波2上分别对应频域OCC{+1,-1}；新增的端口18在子载波1、子载波2上分别对应频域OCC{+1,+1}；新增的端口19在子载波1、子载波2上分别对应频域OCC{+1,-1}。
现有的端口0在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,+1,+1,+1}；现有的端口1在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,+1,+1,+1}；现有的端口6在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,-1,+1,-1}；现有的端口7在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,-1,+1,-1}；新增的端口12在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,+1,-1,-1}；新增的端口13在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,+1,-1,-1}；新增的端口18在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,-1,-1,+1}；新增的端口19在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,-1,-1,+1}。
这样，新增端口对应的DMRS与现有端口对应的DMRS可通过2长的频域OCC和4长的时域OCC进行区分，实现码域正交。
表14A
另外，对于端口2、端口3、端口8、端口9、端口14、端口15、端口20和端口21， 也可采用与端口0、端口1、端口6、端口7、端口12、端口13、端口18和端口19类似的方式对端口对应的DMRS进行区分。例如，各端口对应的DMRS序列在各资源上对应的掩码元素可如表14B所示。
表14B
另外，对于端口4、端口5、端口10、端口11、端口16、端口17、端口22和端口23，也可采用与端口0、端口1、端口6、端口7、端口12、端口13、端口18和端口19类似的方式对端口对应的DMRS进行区分。例如，各端口对应的DMRS序列在各资源上对应的掩码元素可如表14C所示。
表14C
表15A示出了方式D2中各端口对应的DMRS序列在各资源上对应的掩码元素的另一个示例。如表15A所示，在符号2中，现有的端口0在子载波1、子载波2、子载波7和子载波8上分别对应频域OCC{+1,+1,+1,+1}；现有的端口1在子载波1、子载波2、子载波7和子载波8上分别对应频域OCC{+1,-1,+1,-1}；现有的端口6在子载波1、子载波2、子载波7和子载波8上分别对应频域OCC{+1,+1,+1,+1}；现有的端口7在子载波1、子载波2、子载波7和子载波8上分别对应频域OCC{+1,-1,+1,-1}；新增的端口12在子载波1、子载波2、子载波7和子载波8上分别对应频域OCC{+1,+1,-1,-1}；新增的端口13在子载波1、子载波2、子载波7和子载波8上分别对应频域OCC{+1,-1,-1,+1}；新增的端口18在子载波1、子载波2、子载波7和子载波8上分别对应频域OCC{+1,+1,-1,-1}；新增的端口19在子载波1、子载波2、子载波7和子载波8上分别对应频域OCC{+1,-1,-1,+1}。
现有的端口0在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,+1,+1,+1}；现有的端口1在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,+1,+1,+1}；现有的端口6在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,-1,+1,-1}；现有的端口7在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,-1,+1,-1}；新增的端口12在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,+1,-1,-1}；新增的端口13在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,+1,-1,-1}；新增的端口18在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,-1,-1,+1}；新增的端口19在符号2、符号3、符号10和符号11上分别对应时域OCC{+1,-1,-1,+1}。
这样，新增端口对应的DMRS与现有端口对应的DMRS可通过4长的频域OCC和4长的时域OCC进行区分，实现码域正交。
表15A
另外，对于端口2、端口3、端口8、端口9、端口14、端口15、端口20和端口21，也可采用与端口0、端口1、端口6、端口7、端口12、端口13、端口18和端口19类似的方式对端口对应的DMRS进行区分。例如，各端口对应的DMRS序列在各资源上对应的掩码元素可如表15B所示。
表15B
另外，对于端口4、端口5、端口10、端口11、端口16、端口17、端口22和端口23，也可采用与端口0、端口1、端口6、端口7、端口12、端口13、端口18和端口19类似的方式对端口对应的DMRS进行区分。例如，各端口对应的DMRS序列在各资源上对应的掩码元素可如表15C所示。
表15C
应理解，在情况1和情况3中，front-loaded符号为符号2，additional DMRS符号为符号11仅是示例；front-loaded符号和additional DMRS符号可为表3所示的其他符号，例如，front-loaded符号为符号2，additional DMRS符号为符号9。在情况2和情况4中，front-loaded符号为符号2和符号3，additional DMRS符号为符号10和符号11仅是示例；front-loaded符号和additional DMRS符号可为表4所示的其他符号，例如，front-loaded符号为符号2和符号3，additional DMRS符号为符号12和符号13。
通过情况1-情况4中的方式，在新增additional DMRS符号之后，DMRS端口数可至少提升至没有新增additional DMRS符号时的2倍。
需要说明的是，本实施例以新增一组additional DMRS符号为例进行说明。对于新增多组additional DMRS符号的情况，也可以采用类似的方式(例如，扩展TD-OCC的码分组)增加DMRS端口数。例如，在方式A1中，可通过2长的TD-OCC区分通过1组front-loaded符号和1组additional DMRS符号传输的DMRS；可通过类似的方式，使用4长TD-OCC区分通过1组front-loaded和3组additional DMRS符号传输的DMRS。
基于与图7方法实施例相同的发明构思，本申请实施例通过图12提供了一种通信装置，可用于执行上述方法实施例中相关步骤的功能。所述功能可以通过硬件实现，也可以通过软件或者硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。该通信装置的结构如图12所示，包括通信单元1201和处理单元1202。所述通信装置1200可以应用于图1所示的通信系统中的网络设备或终端设备，并可以实现以上本申请实施例以及实例提供的通信方法。下面对所述通信装置1200中的各个单元的功能进行介绍。
所述通信单元1201，用于接收和发送数据。
其中，所述通信单元1201可以通过收发器实现，例如，移动通信模块。其中，移动通信模块可以包括至少一个天线、至少一个滤波器，开关，功率放大器，低噪声放大器(low noise amplifier，LNA)等。所述AN设备可以通过所述移动通信模块与接入的终端设备进行通信。
所述处理单元1202可用于支持所述通信装置1200执行上述方法实施例中的处理动作。所述处理单元1202可以是通过处理器实现。例如，所述处理器可以为中央处理单元(central processing unit，CPU)，还可以是其它通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field programmable gate array，FPGA)或者其它可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。通用处理器可以是微处理器，也可以是任何常规的处理器。
在一种实施方式中，所述通信装置1200应用于图7所示的本申请实施例中的发送设备。下面对该实施方式中的所述处理单元1202的具体功能进行介绍。
所述处理单元1202，用于：
获取第一端口对应的参考信号；
通过所述通信单元1201通过第一资源和第二资源发送所述参考信号；其中，所述第一端口属于第一端口集合或第二端口集合，所述第一资源位于第一正交频分复用OFDM符号；所述第二资源位于第二OFDM符号，所述第一OFDM符号和所述第二OFDM符号不相邻；
所述第一端口集合中的端口对应的参考信号在所述第一资源和所述第二资源上与第一掩码对应，所述第二端口集合中的端口对应的参考信号在所述第一资源和所述第二资源上与第二掩码对应，所述第一掩码和所述第二掩码不同。
可选的，所述第一OFDM符号为前置解调参考信号DMRS符号，所述第二OFDM符号为附加DMRS符号。
可选的，所述处理单元1202具体用于：在通过第一资源和第二资源发送所述参考信号之前，通过所述通信单元1201接收来自网络设备的第一指示信息，所述第一指示信息用于指示通过第一方式发送所述第一端口对应的参考信号；其中，所述第一方式为通过所 述第一资源和所述第二资源发送所述第一端口的参考信号。
可选的，所述第一指示信息包含第一端口索引，所述第一端口索引用于指示所述第一方式。
可选的，所述处理单元1202具体用于：
通过所述通信单元1201接收来自网络设备的第二指示信息，所述第二指示信息用于指示通过第二方式发送所述第一端口对应的参考信号；其中，所述第二方式为通过第三资源和第四资源发送所述第一端口的参考信号；其中，所述第三资源和所述第四资源位于不同的频域资源上，所述第一端口集合中的端口对应的参考信号在所述第三资源和所述第四资源上与第三掩码对应，所述第二端口集合中的端口对应的参考信号在所述第三资源和所述第四资源上与第四掩码对应，所述第三掩码和所述第四掩码不同；
通过所述通信单元1201通过所述第三资源和所述第四资源发送所述第一端口对应的参考信号。
可选的，所述第二指示信息包含第二端口索引，所述第二端口索引用于指示所述第二方式。
可选的，所述处理单元1202具体用于：
通过所述通信单元1201接收来自网络设备的第三指示信息，所述第三指示信息用于指示通过第三方式发送所述第一端口对应的参考信号；其中，所述第三方式为：当所述第一端口属于所述第一端口集合时，通过第五资源发送所述第一端口对应的参考信号；当所述第一端口属于所述第二端口集合时，通过第六资源发送所述第一端口对应的参考信号；所述第五资源和所述第六资源位于不同的频域资源上；
通过所述通信单元1201通过所述第五资源或所述第六资源发送所述第一端口对应的参考信号。
可选的，所述第三指示信息包含第三端口索引，所述第三端口索引用于指示所述第三方式。
可选的，所述第一端口对应的参考信号的序列中的元素与所述第一资源中的资源粒子RE一一对应，所述第一端口对应的参考信号的序列中的元素与所述第二资源中的RE一一对应。
可选的，所述第一端口对应的参考信号的序列包括的元素个数为以下之一：2、4、6、8、12。
在一种实施方式中，所述通信装置1200应用于图7所示的本申请实施例中的接收设备。下面对该实施方式中的所述处理单元1202的具体功能进行介绍。
所述处理单元1202，用于：
通过所述通信单元1201通过第一资源和第二资源接收第一端口对应的参考信号；其中，所述第一端口属于第一端口集合或第二端口集合，所述第一资源位于第一正交频分复用OFDM符号，所述第二资源位于第二OFDM符号，所述第一OFDM符号和所述第二OFDM符号不相邻；
所述第一端口集合中的端口对应的参考信号在所述第一资源和所述第二资源上与第一掩码对应，所述第二端口集合中的端口对应的参考信号在所述第一资源和所述第二资源上与第二掩码对应，所述第一掩码和所述第二掩码不同。
可选的，所述第一OFDM符号为前置解调参考信号DMRS符号，所述第二OFDM符号为附加DMRS符号。
可选的，所述处理单元1202具体用于：在通过第一资源和第二资源接收第一端口对应的参考信号之前，通过所述通信单元1201发送第一指示信息，所述第一指示信息用于指示通过第一方式发送所述第一端口对应的参考信号；其中，所述第一方式为通过所述第一资源和所述第二资源发送所述第一端口的参考信号。
可选的，所述第一指示信息包含第一端口索引，所述第一端口索引用于指示所述第一方式。
可选的，所述处理单元1202具体用于：
通过所述通信单元1201发送第二指示信息，所述第二指示信息用于指示通过第二方式发送所述第一端口对应的参考信号；其中，所述第二方式为通过第三资源和第四资源发送所述第一端口的参考信号；其中，所述第三资源和所述第四资源位于不同的频域资源上，所述第一端口集合中的端口对应的参考信号在所述第三资源和所述第四资源上与第三掩码对应，所述第二端口集合中的端口对应的参考信号在所述第三资源和所述第四资源上与第四掩码对应，所述第三掩码和所述第四掩码不同；
通过所述通信单元1201通过所述第三资源和所述第四资源接收所述第一端口对应的参考信号。
可选的，所述第二指示信息包含第二端口索引，所述第二端口索引用于指示所述第二方式。
可选的，所述处理单元1202具体用于：
通过所述通信单元1201发送第三指示信息，所述第三指示信息用于指示通过第三方式发送所述第一端口对应的参考信号；其中，所述第三方式为：当所述第一端口属于所述第一端口集合时，通过第五资源发送所述第一端口对应的参考信号；当所述第一端口属于所述第二端口集合时，通过第六资源发送所述第一端口对应的参考信号；所述第五资源和所述第六资源位于不同的频域资源上；
通过所述通信单元1201通过所述第五资源或所述第六资源接收所述第一端口对应的参考信号。
可选的，所述第三指示信息包含第三端口索引，所述第三端口索引用于指示所述第三方式。
可选的，所述第一端口对应的参考信号的序列中的元素与所述第一资源中的资源粒子RE一一对应，所述第一端口对应的参考信号的序列中的元素与所述第二资源中的RE一一对应。
可选的，所述第一端口对应的参考信号的序列包括的元素个数为以下之一：2、4、6、8、12。
需要说明的是，本申请以上实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
基于相同的技术构思，本申请实施例通过图13所示提供了一种通信设备，可用于执行上述方法实施例中相关的步骤。所述通信设备可以应用于图1所示的通信系统中的网络设备或终端设备，可以实现以上本申请实施例以及实例提供的通信方法，具有图12所示的通信装置的功能。参阅图13所示，所述通信设备1300包括：通信模块1301、处理器1302以及存储器1303。其中，所述通信模块1301、所述处理器1302以及所述存储器1303之间相互连接。
可选的，所述通信模块1301、所述处理器1302以及所述存储器1303之间通过总线1304相互连接。所述总线1304可以是外设部件互连标准(peripheral component interconnect，PCI)总线或扩展工业标准结构(extended industry standard architecture，EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图13中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
所述通信模块1301，用于接收和发送数据，实现与其他设备之间的通信交互。例如，所述通信模块1301可以通过物理接口、通信模块、通信接口、输入输出接口实现。
所述处理器1302可用于支持所述通信设备1300执行上述方法实施例中的处理动作。当所述通信设备1300用于实现上述方法实施例时，处理器1302还可用于实现上述处理单元1202的功能。所述处理器1302可以是CPU，还可以是其它通用处理器、DSP、ASIC、FPGA或者其它可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。通用处理器可以是微处理器，也可以是任何常规的处理器。
在一种实施方式中，所述通信设备1300应用于图7所示的本申请实施例中的发送设备。所述处理器1302具体用于：
获取第一端口对应的参考信号；
通过所述通信模块1301通过第一资源和第二资源发送所述参考信号；其中，所述第一端口属于第一端口集合或第二端口集合，所述第一资源位于第一正交频分复用OFDM符号，所述第二资源位于第二OFDM符号，所述第一OFDM符号和所述第二OFDM符号不相邻；
所述第一端口集合中的端口对应的参考信号在所述第一资源和所述第二资源上与第一掩码对应，所述第二端口集合中的端口对应的参考信号在所述第一资源和所述第二资源上与第二掩码对应，所述第一掩码和所述第二掩码不同。
在一种实施方式中，所述通信设备1300应用于图7所示的本申请实施例中的接收设备。所述处理器1302具体用于：
通过所述通信模块1301通过第一资源和第二资源接收第一端口对应的参考信号；其中，所述第一端口属于第一端口集合或第二端口集合，所述第一资源位于第一正交频分复用OFDM符号，所述第二资源位于第二OFDM符号，所述第一OFDM符号和所述第二OFDM符号不相邻；
所述第一端口集合中的端口对应的参考信号在所述第一资源和所述第二资源上与第一掩码对应，所述第二端口集合中的端口对应的参考信号在所述第一资源和所述第二资源上与第二掩码对应，所述第一掩码和所述第二掩码不同。
所述处理器1302的具体功能可以参考以上本申请实施例以及实例提供的通信方法中的描述，以及图12所示本申请实施例中对所述通信装置1200的具体功能描述，此处不再赘述。
所述存储器1303，用于存放程序指令和数据等。具体地，程序指令可以包括程序代码，该程序代码包括计算机操作指令。存储器1303可能包含RAM，也可能还包括非易失性存储器(non-volatile memory)，例如至少一个磁盘存储器。处理器1302执行存储器1303所存放的程序指令，并使用所述存储器1303中存储的数据，实现上述功能，从而实现上述本申请实施例提供的通信方法。
可以理解，本申请图13中的存储器1303可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是ROM、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是RAM，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
基于以上实施例，本申请实施例还提供了一种计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行以上实施例提供的方法。
基于以上实施例，本申请实施例还提供了一种计算机可读存储介质，该计算机可读存储介质中存储有计算机程序，所述计算机程序被计算机执行时，使得计算机执行以上实施例提供的方法。
其中，存储介质可以是计算机能够存取的任何可用介质。以此为例但不限于：计算机可读介质可以包括RAM、ROM、EEPROM、CD-ROM或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。
基于以上实施例，本申请实施例还提供了一种芯片，所述芯片用于读取存储器中存储的计算机程序，实现以上实施例提供的方法。
基于以上实施例，本申请实施例提供了一种芯片系统，该芯片系统包括处理器，用于支持计算机装置实现以上实施例中各设备所涉及的功能。在一种可能的设计中，所述芯片 系统还包括存储器，所述存储器用于保存该计算机装置必要的程序和数据。该芯片系统，可以由芯片构成，也可以包含芯片和其他分立器件。
综上所述，本申请实施例提供了一种通信方法、装置及设备，在该方法中，发送设备在获取第一端口对应的参考信号之后，可通过第一资源和第二资源发送参考信号。其中，第一端口属于第一端口集合或第二端口集合，第一资源位于第一OFDM符号，第二资源位于第二OFDM符号，第一OFDM符号和第二OFDM符号不相邻。第一端口集合中的端口对应的参考信号在第一资源和第二资源上与第一掩码对应，第二端口集合中的端口对应的参考信号在第一资源和第二资源上与第二掩码对应，第一掩码和第二掩码不同。通过该方案，发送设备可通过不相邻的多个OFDM符号上的资源传输参考信号；并且，第一端口集合中端口对应的参考信号在该多个OFDM符号上的资源对应第一掩码，第一端口集合中端口对应的参考信号在该多个OFDM符号上的资源对应第二掩码，第一掩码和第二掩码不同，从而可通过不相邻的多个OFDM符号扩展端口数，进而可支持更多的传输流数。
在本申请的各个实施例中，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (24)

  1. 一种通信方法，其特征在于，包括：
    获取第一端口对应的参考信号；
    通过第一资源和第二资源发送所述参考信号；其中，所述第一端口属于第一端口集合或第二端口集合，所述第一资源位于第一正交频分复用OFDM符号，所述第二资源位于第二OFDM符号，所述第一OFDM符号和所述第二OFDM符号不相邻，所述第一端口集合中的端口对应的参考信号在所述第一资源和所述第二资源上与第一掩码对应，所述第二端口集合中的端口对应的参考信号在所述第一资源和所述第二资源上与第二掩码对应，所述第一掩码和所述第二掩码不同。
  2. 如权利要求1所述的方法，其特征在于，所述第一OFDM符号为前置解调参考信号DMRS符号，所述第二OFDM符号为附加DMRS符号。
  3. 如权利要求1或2所述的方法，其特征在于，在通过第一资源和第二资源发送所述参考信号之前，所述方法还包括：
    接收来自网络设备的第一指示信息，所述第一指示信息用于指示通过第一方式发送所述第一端口对应的参考信号；其中，所述第一方式为通过所述第一资源和所述第二资源发送所述第一端口的参考信号。
  4. 如权利要求3所述的方法，其特征在于，所述第一指示信息包含第一端口索引，所述第一端口索引用于指示所述第一方式。
  5. 如权利要求1至4任一项所述的方法，其特征在于，所述方法还包括：
    接收来自网络设备的第二指示信息，所述第二指示信息用于指示通过第二方式发送所述第一端口对应的参考信号；其中，所述第二方式为通过第三资源和第四资源发送所述第一端口的参考信号；其中，所述第三资源和所述第四资源位于不同的频域资源上，所述第一端口集合中的端口对应的参考信号在所述第三资源和所述第四资源上与第三掩码对应，所述第二端口集合中的端口对应的参考信号在所述第三资源和所述第四资源上与第四掩码对应，所述第三掩码和所述第四掩码不同；
    通过所述第三资源和所述第四资源发送所述第一端口对应的参考信号。
  6. 如权利要求5所述的方法，其特征在于，
    所述第二指示信息包含第二端口索引，所述第二端口索引用于指示所述第二方式。
  7. 如权利要求1至6任一项所述的方法，其特征在于，所述方法还包括：
    接收来自网络设备的第三指示信息，所述第三指示信息用于指示通过第三方式发送所述第一端口对应的参考信号；其中，所述第三方式为：当所述第一端口属于所述第一端口集合时，通过第五资源发送所述第一端口对应的参考信号；当所述第一端口属于所述第二端口集合时，通过第六资源发送所述第一端口对应的参考信号；所述第五资源和所述第六资源位于不同的频域资源上；
    通过所述第五资源或所述第六资源发送所述第一端口对应的参考信号。
  8. 如权利要求7所述的方法，其特征在于，
    所述第三指示信息包含第三端口索引，所述第三端口索引用于指示所述第三方式。
  9. 如权利要求1至8任一项所述的方法，其特征在于，
    所述第一端口对应的参考信号的序列中的元素与所述第一资源中的资源粒子RE一一 对应，所述第一端口对应的参考信号的序列中的元素与所述第二资源中的RE一一对应。
  10. 如权利要求9所述的方法，其特征在于，所述第一端口对应的参考信号的序列包括的元素个数为以下之一：2、4、6、8、12。
  11. 一种通信方法，其特征在于，包括：
    通过第一资源和第二资源接收第一端口对应的参考信号；其中，所述第一端口属于第一端口集合或第二端口集合，所述第一资源位于第一正交频分复用OFDM符号，所述第二资源位于第二OFDM符号，所述第一OFDM符号和所述第二OFDM符号不相邻，所述第一端口集合中的端口对应的参考信号在所述第一资源和所述第二资源上与第一掩码对应，所述第二端口集合中的端口对应的参考信号在所述第一资源和所述第二资源上与第二掩码对应，所述第一掩码和所述第二掩码不同。
  12. 如权利要求11所述的方法，其特征在于，所述第一OFDM符号为前置解调参考信号DMRS符号，所述第二OFDM符号为附加DMRS符号。
  13. 如权利要求11或12所述的方法，其特征在于，在通过第一资源和第二资源接收第一端口对应的参考信号之前，所述方法还包括：
    发送第一指示信息，所述第一指示信息用于指示通过第一方式发送所述第一端口对应的参考信号；其中，所述第一方式为通过所述第一资源和所述第二资源发送所述第一端口的参考信号。
  14. 如权利要求13所述的方法，其特征在于，所述第一指示信息包含第一端口索引，所述第一端口索引用于指示所述第一方式。
  15. 如权利要求11至14任一项所述的方法，其特征在于，所述方法还包括：
    发送第二指示信息，所述第二指示信息用于指示通过第二方式发送所述第一端口对应的参考信号；其中，所述第二方式为通过第三资源和第四资源发送所述第一端口的参考信号；其中，所述第三资源和所述第四资源位于不同的频域资源上，所述第一端口集合中的端口对应的参考信号在所述第三资源和所述第四资源上与第三掩码对应，所述第二端口集合中的端口对应的参考信号在所述第三资源和所述第四资源上与第四掩码对应，所述第三掩码和所述第四掩码不同；
    通过所述第三资源和所述第四资源接收所述第一端口对应的参考信号。
  16. 如权利要求15所述的方法，其特征在于，
    所述第二指示信息包含第二端口索引，所述第二端口索引用于指示所述第二方式。
  17. 如权利要求11至16任一项所述的方法，其特征在于，所述方法还包括：
    发送第三指示信息，所述第三指示信息用于指示通过第三方式发送所述第一端口对应的参考信号；其中，所述第三方式为：当所述第一端口属于所述第一端口集合时，通过第五资源发送所述第一端口对应的参考信号；当所述第一端口属于所述第二端口集合时，通过第六资源发送所述第一端口对应的参考信号；所述第五资源和所述第六资源位于不同的频域资源上；
    通过所述第五资源或所述第六资源接收所述第一端口对应的参考信号。
  18. 如权利要求17所述的方法，其特征在于，
    所述第三指示信息包含第三端口索引，所述第三端口索引用于指示所述第三方式。
  19. 如权利要求11至18任一项所述的方法，其特征在于，
    所述第一端口对应的参考信号的序列中的元素与所述第一资源中的资源粒子RE一一对应，所述第一端口对应的参考信号的序列中的元素与所述第二资源中的RE一一对应。
  20. 如权利要求19所述的方法，其特征在于，所述第一端口对应的参考信号的序列包括的元素个数为以下之一：2、4、6、8、12。
  21. 一种通信装置，其特征在于，包括：
    通信单元，用于接收和发送数据；
    处理单元，用于通过所述通信单元，执行如权利要求1-20任一项所述的方法。
  22. 一种通信系统，其特征在于，包括：
    发送设备，用于实现如权利要求1-10任一项所述的方法；
    接收设备，用于实现如权利要求11-20任一项所述的方法。
  23. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行权利要求1-20任一项所述的方法。
  24. 一种芯片，其特征在于，所述芯片与存储器耦合，所述芯片读取所述存储器中存储的计算机程序，执行权利要求1-20任一项所述的方法。
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