WO2023125697A1 - Appareil et procédé de communication, et dispositif - Google Patents

Appareil et procédé de communication, et dispositif Download PDF

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Publication number
WO2023125697A1
WO2023125697A1 PCT/CN2022/142942 CN2022142942W WO2023125697A1 WO 2023125697 A1 WO2023125697 A1 WO 2023125697A1 CN 2022142942 W CN2022142942 W CN 2022142942W WO 2023125697 A1 WO2023125697 A1 WO 2023125697A1
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WIPO (PCT)
Prior art keywords
sequence
port
resource
sequences
dmrs
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PCT/CN2022/142942
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English (en)
Chinese (zh)
Inventor
董昶钊
李博
高翔
刘鹍鹏
曲秉玉
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华为技术有限公司
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Publication of WO2023125697A1 publication Critical patent/WO2023125697A1/fr

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    • 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
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present application relates to the technical field of communication, and in particular to a communication method, device and equipment.
  • the demodulation reference signal can be used to estimate data channel (for example, physical downlink shared channel (physical downlink shared channel, PDSCH)) or control channel (for example, physical downlink control channel (physical downlink control channel, PDCCH) ) of the equivalent channel matrix, which is used for data detection and demodulation.
  • data channel for example, physical downlink shared channel (physical downlink shared channel, PDSCH)
  • control channel for example, physical downlink control channel (physical downlink control channel, PDCCH) of the equivalent channel matrix, which is used for data detection and demodulation.
  • a DMRS port corresponds to a spatial layer, and each spatial layer corresponds to a transport stream.
  • MIMO multiple input and multiple output
  • the number of DMRS ports required is R.
  • the fifth generation (the 5 th , 5G) new radio (new radio, NR) supports two types of DMRS resource mapping, which are 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 MIMO transmission of 6 streams at most.
  • the number of terminal devices With the denser deployment of wireless communication devices in the future, the number of terminal devices will further increase, which puts forward higher requirements for 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 , so that a higher number of transmission streams can be further supported to improve the spectrum efficiency of the MIMO system.
  • This will inevitably require more DMRS ports to support a higher number of transmission streams (single symbol greater than 6 streams). Therefore, it is necessary to improve the current DMRS configuration method in order to support a higher number of transmission streams.
  • the present application provides a communication method, device and equipment for supporting more transmission streams.
  • the embodiment of the present application provides a communication method.
  • the method may be executed by a sending device, for example, the sending device may be a network device or a terminal device.
  • the method includes:
  • the sending device may send indication information, where the indication information is used to indicate that the port belongs to the first port set or the second port set.
  • the first port set corresponds to the first resource
  • the second port set corresponds to the first resource and the second resource
  • the first resource and the second resource are located on the same time domain resource.
  • the same time domain resource may be the same time unit, for example, the same OFDM symbol, or the same two OFDM symbols.
  • the sending device can send indication information for indicating whether the port belongs to the first port set or the second port set.
  • the sending device can send the first reference signal through the first resource; when the port belongs to the second port set, that is, the sending device When it is necessary to send the second reference signal corresponding to the second port set, the sending device may send the second reference signal by using the first resource and the second resource.
  • the first port set corresponds to the first reference signal
  • the second port set corresponds to the second reference signal
  • the number of first reference signal ports contained in the first port set is smaller than the second reference signal contained in the second port set Number of signal ports.
  • first reference signal and the second reference signal may represent one or more reference signal symbols, the one or more reference signal symbols are mapped to one or more time-frequency resources, and the reference signal may correspond to one or more ports , which is not limited in this application.
  • the first reference signal may correspond to an existing port, and the second reference signal may correspond to a newly added port.
  • the first resource can correspond to different port sets (for example, CDM groups hereinafter), and the two port sets corresponding to the first resource can support different numbers of reference signal ports.
  • the reference signals corresponding to the two port sets can be mapped to part of the same time-frequency resources, thereby increasing the number of ports corresponding to the time-frequency resources, and further supporting more transmission streams.
  • the sending device may also acquire the first sequence and/or the second sequence.
  • the first sequence corresponds to the first resource, specifically, elements in the first sequence correspond to REs in the first resource one by one.
  • the second sequence corresponds to the first resource and the second resource, specifically, elements in the second sequence correspond to REs in the first resource and the second resource one by one.
  • the number of elements contained in the first sequence is different from the number of elements contained in the second sequence.
  • the sending device can obtain the first sequence corresponding to the port, and map the first reference signal according to the first sequence to the first resource.
  • the sending device can obtain the second sequence corresponding to the port, and map the second reference signal to the second sequence according to the second sequence. on the first resource and on the second resource.
  • the first reference signal and the second reference signal carried by the first resource can be distinguished by the first sequence and the second sequence of different lengths; thus, more reference signal ports can be supported, and more The number of transport streams.
  • the first sequence belongs to a first sequence set, and sequences in the first sequence set are in one-to-one correspondence with at least one first reference signal.
  • the second sequence belongs to a second sequence set, and sequences in the second sequence set correspond to at least one second reference signal one-to-one.
  • the average value of multiple values formed by the cross-correlation coefficients between any sequence in the first sequence set and any sequence in the second sequence set is less than or equal to a first threshold.
  • the cross-correlation coefficient between any sequence in the first sequence set and any sequence in the second sequence set is less than or equal to the first threshold, that is, each sequence in the first sequence set and Each sequence in the second set of sequences has a low cross-correlation.
  • the relationship between the first sequence set and the second sequence set can be one of the following:
  • Any sequence in the first sequence set is orthogonal to any sequence in the first subset in the second sequence set, and the cross-correlation coefficient with any sequence other than the first subset in the second sequence set is
  • Any sequence in the first sequence set is orthogonal to any sequence in the first subset in the second sequence set, and the cross-correlation coefficient with any sequence other than the first subset in the second sequence set is
  • Any sequence in the first sequence set is orthogonal to any sequence in the first subset in the second sequence set, and the cross-correlation coefficient with any sequence other than the first subset in the second sequence set is
  • the multiple sequences included in the first sequence set are orthogonal to each other, and the multiple sequences included in the second sequence set are orthogonal to each other.
  • the number of elements included in the sequence included in the first sequence set is 2, and the number of elements included in the sequence included in the second sequence set is 4 or 6.
  • the first subset includes half of the sequences in the second sequence set.
  • the first subset includes 3 sequences in the second set of sequences; or, when the second set of sequences includes 4 sequences, the first subset includes the second set of sequences 3 sequences in .
  • the two sequence sets correspond to existing ports and newly added ports respectively. Therefore, there is a low cross-correlation between the DMRS signal corresponding to the existing port and the DMRS signal corresponding to any newly-added port, thereby ensuring the reusability of the existing port and the newly-added port, thereby ensuring that the DMRS signal corresponding to the existing DMRS port The interference between the DMRS signal and the DMRS signal corresponding to the newly added port is minimized.
  • sequences in the second sequence set can be determined by one of the following methods:
  • each sequence in the second sequence set is a row vector of the matrix b.
  • each sequence in the second sequence set includes 4 elements in a row vector in the matrix b.
  • matrix b satisfies one of the following formulas:
  • each sequence in the second sequence set is a row vector of the matrix B.
  • This design provides an example of a variety of second sequence collections. Through this design, the sequences in the second sequence set can be flexibly obtained.
  • the embodiment of the present application provides a communication method.
  • the method can be executed by a receiving device, for example, the receiving device can be a network device or a terminal device.
  • the method includes:
  • the receiving device receives the indication information; wherein, the indication information is used to indicate that the port belongs to the first port set or the second port set.
  • the first port set corresponds to the first resource
  • the second port set corresponds to the first resource and the second resource
  • the first resource and the second resource are located on the same time domain resource.
  • the same time domain resource may be the same time unit, for example, the same OFDM symbol, or the same two OFDM symbols.
  • the receiving device can determine whether the indicated port belongs to the first port set or the second port set according to the indication information.
  • the receiving device can receive the first reference signal through the first resource; when the port belongs to the second port set, that is, the receiving device When it is necessary to receive the second reference signal corresponding to the second port set, the receiving device may receive the second reference signal through the first resource and the second resource.
  • the first port set corresponds to the first reference signal
  • the second port set corresponds to the second reference signal
  • the number of first reference signal ports contained in the first port set is smaller than the second reference signal contained in the second port set Number of signal ports.
  • the first resource can correspond to different port sets (for example, CDM groups hereinafter), and the two port sets corresponding to the first resource can support different numbers of reference signal ports.
  • the reference signals corresponding to the two port sets can be mapped to part of the same time-frequency resources, thereby increasing the number of ports corresponding to the time-frequency resources, and further supporting more transmission streams.
  • the first sequence corresponds to the first resource, specifically, elements in the first sequence correspond to REs in the first resource one by one.
  • the second sequence corresponds to the first resource and the second resource, specifically, elements in the second sequence correspond to REs in the first resource and the second resource one by one.
  • the number of elements contained in the first sequence is different from the number of elements contained in the second sequence.
  • the receiving device can receive the first reference signal corresponding to the first sequence through the first resource, receive the second reference signal corresponding to the second sequence through the first resource and the second resource, and the first resource and the second sequence
  • the two resources are located on the same time domain resource.
  • the number of elements contained in the first sequence is different from the number of elements contained in the second sequence.
  • the first reference signal and the second reference signal carried by the first resource can be distinguished by the first sequence and the second sequence of different lengths; thus, more reference signal ports can be supported, and more transmission streams can be supported number.
  • the first sequence belongs to a first sequence set, and sequences in the first sequence set are in one-to-one correspondence with at least one first reference signal.
  • the second sequence belongs to a second sequence set, and sequences in the second sequence set correspond to at least one second reference signal one-to-one.
  • the relationship between the first sequence set and the second sequence set can be one of the following:
  • Any sequence in the first sequence set is orthogonal to any sequence in the first subset in the second sequence set, and the cross-correlation coefficient with any sequence other than the first subset in the second sequence set is
  • Any sequence in the first sequence set is orthogonal to any sequence in the first subset in the second sequence set, and the cross-correlation coefficient with any sequence other than the first subset in the second sequence set is
  • the multiple sequences included in the first sequence set are orthogonal to each other, and the multiple sequences included in the second sequence set are orthogonal to each other.
  • the number of elements included in the sequence included in the first sequence set is 2, and the number of elements included in the sequence included in the second sequence set is 4 or 6.
  • the first subset includes half of the sequences in the second sequence set.
  • the first subset includes 3 sequences in the second set of sequences; or, when the second set of sequences includes 4 sequences, the first subset includes the second set of sequences 3 sequences in .
  • the two sequence sets correspond to existing ports and newly added ports respectively. Therefore, there is a low cross-correlation between the DMRS signal corresponding to the existing port and the DMRS signal corresponding to any newly-added port, thereby ensuring the reusability of the existing port and the newly-added port, thereby ensuring that the DMRS signal corresponding to the existing DMRS port The interference between the DMRS signal and the DMRS signal corresponding to the newly added port is minimized.
  • sequences in the second sequence set can be determined by one of the following methods:
  • each sequence in the second sequence set is a row vector of the matrix b.
  • each sequence in the second sequence set includes 4 elements in a row vector in the matrix b.
  • matrix b satisfies one of the following formulas:
  • This design provides an example of a variety of second sequence collections. Through this design, the sequences in the second sequence set can be flexibly obtained.
  • the embodiment of the present application provides a communication device, including a unit configured to perform each step in any one of the above aspects.
  • the embodiment of the present application provides 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 program and data stored in the storage element enable the method provided by any one of the above aspects of the present application to be realized.
  • an embodiment of the present application provides a communication system, including: a sending device configured to execute the method provided in the first aspect, and a receiving device configured to execute the method provided in the second aspect.
  • the sending device when the sending device is a network device, the receiving device may be a terminal device; when the sending device is a terminal device, the receiving device may be a network device.
  • the embodiment of the present application further provides a computer program, which, when the computer program is run on a computer, causes the computer to execute the method provided in any one of the above aspects.
  • the embodiment of the present application also provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a computer, the computer executes any one of the above-mentioned method provided.
  • the embodiment of the present application further provides a chip, the chip is used to read a computer program stored in a memory, and execute the method provided in any one of the above aspects.
  • the embodiment of the present application further provides a chip system, where the chip system includes a processor, configured to support a computer device to implement the method provided in any one 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 system-on-a-chip may consist of chips, or may include chips and other discrete devices.
  • FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a network device provided in an embodiment of the present application.
  • FIG. 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 a single-symbol Type 1 DMRS time-frequency resource mapping method
  • Figure 5 is a schematic diagram of a single symbol Type 2 DMRS time-frequency resource mapping method
  • FIG. 6 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a first correspondence rule between a mask sequence element index and a time-frequency resource provided by an embodiment of the present application
  • FIG. 8 is a schematic diagram of a first time-frequency resource mapping method provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a second correspondence rule between a mask sequence element index and a time-frequency resource provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a second time-frequency resource mapping method provided in an embodiment of the present application.
  • FIG. 11 is a schematic diagram of a third correspondence rule between the mask sequence element index and the time-frequency resource provided by the embodiment of the present application.
  • FIG. 12 is a schematic diagram of a third time-frequency resource mapping method provided by an embodiment of the present application.
  • FIG. 13 is a schematic diagram of the fourth corresponding rule between the mask sequence element index and the time-frequency resource provided by the embodiment of the present application;
  • FIG. 14 is a schematic diagram of a fourth time-frequency resource mapping method provided by an embodiment of the present application.
  • FIG. 15 is a schematic diagram of the fifth corresponding rule between the mask sequence element index and the time-frequency resource provided by the embodiment of the present application;
  • FIG. 16 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 17 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the present application provides a communication method, device and equipment to support more transmission streams.
  • the method and the device are conceived based on the same technology. Since the principle of solving the problem is similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
  • the sending device may send indication information, where the indication information is used to indicate that a port belongs to the first port set or the second port set.
  • the first port set corresponds to the first resource
  • the second port set corresponds to the first resource and the second resource
  • the first resource and the second resource are located on the same time domain resource.
  • a terminal device is a device that provides voice and/or data connectivity to users.
  • Terminal equipment can also be called user equipment (user equipment, UE), terminal (terminal), access terminal, terminal unit, terminal station, mobile 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 may be a handheld device with a wireless connection function, or a vehicle with a communication function, or a vehicle-mounted device (such as a vehicle-mounted communication device, a vehicle-mounted communication chip), and the like.
  • some examples of terminal equipment are: mobile phone, cordless phone, session initiation protocol (session initiation protocol, SIP) phone, wireless local loop (wireless local loop, WLL) station, 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, palmtop computer, mobile Internet device (mobile internet device, MID ), wearable devices, virtual reality (virtual reality, VR) equipment, augmented reality (augmented reality, AR) equipment, 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 in the wireless terminal, etc.
  • virtual reality virtual reality
  • AR augmented
  • the network device is the device that connects the terminal device to the wireless network in the mobile communication system.
  • a network device can also be called a base station, a wireless access network (radio access network, RAN) node (or device), an access point (access point, AP), and an access network (access network). , AN) equipment.
  • radio access network radio access network
  • RAN wireless access network
  • AP access point
  • access network access network
  • AN access network equipment
  • Examples of some network devices are: new generation Node B (generation Node B, gNB), transmission reception point (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 (base station controller, BSC), base transceiver station (base transceiver station, BTS), transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), mobile switching center, home base station (for example, home evolved NodeB, or home Node B, HNB), or base band unit (base band unit, BBU), etc.
  • RNC radio network controller
  • Node B Node B
  • BSC base station controller
  • base transceiver station base transceiver station
  • BTS base transceiver station
  • TRP transmission point
  • TP transmission point
  • mobile switching center home base station (for example, home evolved NodeB, or home Node B, HNB), or base band
  • time unit generally refers to the unit of time.
  • the time unit may be, but not limited to, a subframe (subframe), a mini subframe, a slot (slot), a symbol, a transmission time interval (transmission time interval, TTI) and the like.
  • the symbol may be a time-domain symbol (for example, an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol) and the like.
  • Spatial layer For a spatial multiplexing MIMO system, multiple parallel data streams can be transmitted simultaneously on the same frequency domain resource, and each data stream is called a spatial layer.
  • the spatial layer in MIMO may also be called a transmission layer, a data layer, a spatial stream, and the like.
  • nouns for the number of nouns, unless otherwise specified, it means “singular noun or plural noun", that is, “one or more". “At least one” means one or more, and “plurality” means two or more. "And/or” describes the association relationship of associated objects, indicating that there may be three kinds of relationships, for example, A and/or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently. The character “/" generally indicates that the contextual objects are an "or” relationship. For example, A/B means: A or B. "At least one (individual) of the following" or similar expressions refer to any combination of these items (individuals), including any combination of a single item (individuals) or a plurality of item (individuals).
  • Fig. 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 capable of receiving and transmitting wireless signals on the network side, and is responsible for providing services related to wireless access for terminal devices within its coverage area, and realizing physical layer functions, resource scheduling and wireless resource management, and quality of service ( Quality of Service, QoS) management, wireless access control and mobility management functions.
  • QoS Quality of Service
  • the terminal device is an entity capable of receiving and transmitting wireless signals on the user side, and needs to access the network through the network device.
  • the terminal device may be various devices that provide voice and/or data connectivity for users.
  • the terminal device has 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 also has multiple transmitting antennas and multiple receiving antennas, and has multiple transmitting and multiple receiving capabilities.
  • the system may also be called a MIMO system.
  • the structure of the network device in the embodiment of the present application may be as shown in FIG. 2 .
  • the network device can be divided into a centralized unit (centralized unit, CU) node and at least one distributed unit (distributed unit, DU).
  • the CU can be used to manage or control at least one DU, and it can also be called that the CU is connected with the at least one DU.
  • This structure can disassemble the protocol layers of the network equipment in the communication system. Some of the protocol layers are placed in the CU for centralized control, and the remaining part or all of the protocol layer functions are distributed in the DU, and the CU centrally controls the DU.
  • the protocol layer of gNB includes radio resource control (radio resource control, RRC) layer, service data adaptation protocol (service data adaptation protocol, SDAP) layer, packet data convergence protocol (packet data convergence protocol, PDCP) layer, radio link control (radio link control, RLC) layer, media access control sublayer (media access control, MAC) layer and physical layer.
  • RRC radio resource control
  • SDAP service data adaptation protocol
  • PDCP packet data convergence protocol
  • RLC radio link control
  • media access control sublayer media access control
  • MAC media access control
  • the CU can be used to realize the functions of the RRC layer, the SDAP layer and the PDCP layer
  • the DU can be used to realize the functions of the RLC layer, the MAC layer and the physical layer.
  • the embodiment of the present application does not specifically limit the protocol stack included in the CU and DU.
  • the CU in the embodiment of the present application can be further divided into one 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 E1 interface.
  • the interface between the CU-CP and the DU may be F1-C, which is used for transmission of control plane signaling.
  • the interface between CU-UP and DU may be F1-U, which is used for user plane data transmission.
  • the CU-UP can be connected with the CU-UP through the Xn-U port for user plane data transmission.
  • the structure of gNB may be as shown in FIG. 3 .
  • the mobile communication system shown in FIG. 1 is used as an example, and does not limit the communication system to which the method provided in the embodiment of the present application is applicable.
  • the method and device 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, for example, 5G Communication system, Long Term Evolution (LTE) communication system, NR, wireless-fidelity (Wireless-fidelity, WiFi), world interoperability for microwave access (WiMAX), vehicle to everything (vehicle to everything) everything, V2X), long-term evolution-vehicle networking (LTE-vehicle, LTE-V), vehicle to vehicle (vehicle to vehicle, V2V), vehicle networking, machine type communications (Machine Type Communications, MTC), Internet of Things (internet of things) things, IoT), long-term evolution-machine to machine (LTE-machine to machine, L
  • 5G Communication system Long
  • 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), so that For data detection and demodulation.
  • the channel may produce certain weights or changes (for example, changes in amplitude, changes in phase, or changes in frequency, etc.) to the experienced signal.
  • the channel can also be called a channel response, and the channel response can be represented by a channel response coefficient.
  • the DMRS and the data perform the same precoding operation (multiplied by the same precoding matrix P) and experience the same channel.
  • the receiving end can use a 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 Downlink Reference Signal
  • N R the number of receiving antennas
  • R 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 simply referred to as a port in this application) corresponds to one spatial layer. Therefore, for MIMO transmission with the number of transmission streams R, the number of DMRS ports required is R.
  • different DMRS ports are orthogonal ports, so as to avoid interference between different DMRS ports.
  • the fact that different DMRS ports are orthogonal ports means that DMRS symbols corresponding to different DMRS ports are orthogonal in the frequency domain, time-frequency domain or code domain.
  • DMRS ports in order to perform channel estimation on different time-frequency resources and ensure channel estimation quality, it is necessary to transmit multiple DMRS symbols in multiple time-frequency resources.
  • the DMRS can occupy at least one 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 reference signal 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 rule.
  • the mth reference sequence element r(m) in its corresponding DMRS sequence can be mapped to a 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, and the mapping rule satisfies:
  • n 0,1,...;
  • 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.
  • the values of w f (k′), w t (l′) and ⁇ corresponding to DMRS port p can be determined according to Table 1.
  • ⁇ is an index of a code division multiplexing (CDM) group (also called an orthogonal multiplexing group) to which port p belongs, and DMRS ports in the same orthogonal multiplexing group occupy the same time-frequency resources.
  • 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 (mapped on different frequency domain resources).
  • the DMRS ports included in the CDM group are mapped to the same time-frequency resource.
  • the reference signal sequences corresponding to the DMRS ports included in the CDM group are distinguished by the mask sequence, thereby ensuring the orthogonality of the DMRS ports in the CDM group, thereby suppressing interference between DMRSs transmitted on different antenna ports.
  • port 0 and port 1 are located in the same resource element (RE), and resource mapping is performed in a comb-tooth manner in the frequency domain. That is, there is a subcarrier interval between adjacent frequency domain resources occupied by port 0 and port 1 .
  • two adjacent occupied REs correspond to a mask sequence with a length of 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 located in the same RE, and are mapped to unoccupied REs of port 0 and port 1 in a comb-tooth manner in the frequency domain.
  • port 2 and port 3 use a set of mask sequences of length 2 (+1+1 and +1-1).
  • p in the application form is a port index
  • a port with a port index of 1000 may be port 0 or port
  • a port with a port index of 1001 may be port 1 or port 1
  • a port with a port index of 100X Can be port X or 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 multiplexing.
  • the DMRS ports included in the CDM group are mapped to the same time-frequency resource.
  • 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 a comb-tooth manner in the frequency domain, that is, the adjacent frequencies occupied by port 0, port 1, port 4, and port 5 Domain resources are separated by one subcarrier.
  • the occupied 2 adjacent subcarriers and 2 OFDM symbols correspond to a mask sequence with a length of 4.
  • 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 unoccupied subcarriers of port 0, port 1, port 4, and port 5 in the frequency domain in a comb-tooth manner.
  • port 2, port 3, port 6 and port 7 use a set of mask sequences of length 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 an index of a CDM group (also called an orthogonal multiplexing group) to which port p belongs, and DMRS ports in the same CDM group occupy the same time-frequency resources.
  • CDM group also called an orthogonal multiplexing group
  • the Type 2 DMRS time-frequency resource mapping method is shown in Figure 5.
  • DMRS For single-symbol DMRS, a maximum of 6 ports are supported, and DMRS resources occupy 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 DMRSs corresponding to DMRS ports included in a CDM group are mapped on the same time-frequency resource.
  • the reference signal sequences corresponding to the DMRS ports included in the CDM group are distinguished by mask sequences.
  • a DMRS port For a DMRS port, its corresponding DMRS reference signal is mapped in a plurality of resource sub-blocks containing 2 consecutive sub-carriers in the frequency domain, and adjacent resource sub-blocks are separated by 4 sub-carriers in the frequency domain.
  • port 0 and port 1 are located in the same RE, and resource mapping is performed in a comb-tooth manner in the frequency domain.
  • resource mapping is performed in a comb-tooth manner in the frequency domain.
  • resource granularity 1 RB as an example
  • 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.
  • 2 DMRS ports included in one CDM group they correspond to mask sequences of length 2 (+1+1 and +1-1) in 2 adjacent subcarriers.
  • DMRS For two-symbol DMRS, a maximum of 12 ports are supported, and 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 DMRSs corresponding to DMRS ports included in a CDM group are mapped on the same time-frequency resource.
  • 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 a plurality of resource subblocks containing 2 consecutive subcarriers in the frequency domain, and adjacent resource subblocks are separated by 4 subcarriers 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 a comb-tooth manner in the frequency domain.
  • resource mapping is performed in a comb-tooth manner in the frequency domain.
  • port 0, port 1, port 6 and port 7 occupy subcarrier 0, subcarrier 1, subcarrier 6 and subcarrier 7 corresponding to OFDM symbol 0 and OFDM symbol 1.
  • 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 length of 4 mask sequences (+1+1+1+1/+1+1- 1-1/+1-1+1-1/+1-1-1+1).
  • p in the application form is a port index
  • a port with a port index of 1000 may be port
  • a port with a port index of 1001 may be port 1
  • a port with a port index of 100X may be port X.
  • a single-symbol DMRS in NR can support up to 6 DMRS ports, thereby supporting up to 6 streams of MIMO transmission.
  • higher requirements are placed 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 channel information acquisition will be more accurate, which can further support higher The number of transmission streams to improve the spectral efficiency of MIMO systems. This will inevitably require more DMRS ports to support a higher number of transmission streams (greater than 6 streams).
  • a possible method for expanding the number of existing orthogonal DMRS ports is to increase the time-frequency resources occupied by the DMRS. This method can ensure that the number of resources occupied by the 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, and more time-frequency resources need to be occupied, increasing DMRS overhead. Moreover, the increase of DMRS overhead will also reduce the spectral 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 resource (overhead).
  • a DMRS sequence with low cross-correlation corresponding to the newly added DMRS is designed.
  • the sequence corresponding to the newly added DMRS port and the sequence corresponding to the existing DMRS port ensure low cross-correlation.
  • the superposition of non-orthogonal ports will inevitably bring some interference, resulting in loss of system performance (eg, channel estimation capability). Therefore, how to introduce a new DMRS port and reduce the impact on channel estimation performance without increasing additional time-frequency resource overhead is a problem to be solved.
  • An embodiment of the present application provides a communication method, which is applied to the communication system shown in FIG. 1 and executed by a network device or a terminal device.
  • 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.
  • the reference signal is mainly DMRS as an example.
  • the DMRS can be replaced by other types of reference signals according to actual needs.
  • the communication method provided by the embodiment of the present application may include the following steps:
  • the sending device sends indication information; where the indication information may be used to indicate that a port (hereinafter referred to as a first port) belongs to a first port set or a second port set.
  • the receiving device receives the indication information.
  • the indication information may be sent through a message (for example, an RRC message), or may be carried in control information (for example, uplink control information (uplink control information, UCI), or downlink control information (downlink control information, DCI)) middle.
  • control information for example, uplink control information (uplink control information, UCI), or downlink control information (downlink control information, DCI)
  • the first port set corresponds to the first resource, that is, the reference signals corresponding to the ports in the first port set can be mapped to the first resource.
  • the second port set corresponds to the first resource and the second resource, that is, the reference signal corresponding to the port in the second port set can be mapped to the first resource and the second resource.
  • the first resource and the second resource may be located on the same time domain resource.
  • the same time domain resource may be the same time unit, for example, the same symbol (such as an OFDM symbol), and the same two symbols.
  • the first port set and the second port set are different CDM groups.
  • the first port set can be CDM group 0 or CDM group 1; for single-symbol Type 1 DMRS and single-symbol Type 2 DMRS, the first port set can be CDM group 0, CDM group 1 or CDM group 2.
  • the second set of ports may be CDM group 3 .
  • CDM group 3 may include port 4 to port 7, or port 12 to port 17; for two-symbol DMRS, CDM group 3 may include port 8 to port 15, or port 12 to port 23.
  • the sending device sends a reference signal corresponding to the first port on the time-frequency resource corresponding to the first port.
  • the receiving device sends the reference signal corresponding to the first port on the time-frequency resource corresponding to the first port.
  • the time-frequency resource corresponding to the first port is the first resource corresponding to the first port set.
  • the time-frequency resource corresponding to the first port is the first resource and the second resource corresponding to the second port set.
  • S602 will be described below by taking the single-symbol DMRS and the two-symbol DMRS as examples.
  • the first port set may include 2 ports, and the first resource may include 2 REs (for example, 2 subcarriers corresponding to one OFDM symbol).
  • the second port set may include 4 ports, and the second resource may include 2 REs connected to the first resource (for example, 2 consecutive subcarriers corresponding to one OFDM symbol); or, the second port set may include 6 ports,
  • the second resource may include 4 REs connected to the first resource (for example, 4 consecutive subcarriers corresponding to one OFDM symbol).
  • the first port set can include port 0 and port 1, the first resource includes RE0 and RE2; the second port set includes port 4 to port 7, and the second resource Includes RE1 and RE3.
  • the reference signal corresponding to port 0 or the reference signal corresponding to port 1 can be mapped to RE0 and RE2
  • the reference signal corresponding to any one of port 4 to port 7 can be mapped to RE0 to RE3.
  • the first port set can include port 0 and port 1, and the first resource includes RE0 and RE1; the second port set includes port 12 to port 17, and the second port set includes port 0 and port 1.
  • Resources include RE2 through RE5.
  • the reference signal corresponding to port 0 or the reference signal corresponding to port 1 can be mapped to RE0 and RE1
  • the reference signal corresponding to any one of port 12 to port 17 can be mapped to RE0 to RE5.
  • the first port set may include 4 ports, and the first resource may include 4 REs (for example, 2 subcarriers corresponding to 2 OFDM symbols).
  • the second port set may include 8 ports, and the second resource may include 4 REs connected to the first resource (for example, 2 subcarriers corresponding to 2 OFDM symbols); or, the second port set may include 12 ports,
  • the second resource may include 8 REs (eg, 4 consecutive subcarriers corresponding to 2 OFDM symbols) connected to the first resource.
  • the first port set can include port 0, port 1, port 4, port 5, the first resource includes RE0, RE2, RE12 and RE14; the second port set includes port 8 to port 15, The second resource includes RE1, RE3, RE13 and RE15.
  • the reference signal corresponding to any port of port 0, port 1, port 4 and port 5 can be mapped to RE0, RE2, RE12 and RE14, and the reference signal corresponding to any port of port 8 to port 15 can be mapped to RE0 to RE3, and RE12 to RE15.
  • the first port set may include port 0, port 1, port 6 and port 7, the first resource includes RE0, RE1, RE12 and RE13; the second port set includes port 12 to port 23 , the second resource includes RE2 to RE5, and RE14 to RE17.
  • the reference signal corresponding to any port of port 0, port 1, port 6, and port 7 can be mapped to RE0, RE1, RE12, and RE13, and the reference signal corresponding to any port from port 12 to port 23 can be mapped to RE0 to RE5, and on RE12 to RE17.
  • the sending device may generate the first reference signal according to the first sequence and the third sequence; generate the second reference signal according to the second sequence and the fourth sequence.
  • the third sequence and the fourth sequence may respectively be base sequences of the reference signal.
  • the base sequence of the reference signal may be a pseudo-random sequence, such as a gold sequence.
  • the sending device when the sending device needs to send the first reference signal corresponding to the first port set, it can send the first reference signal through the first resource; when the sending device needs to send the second reference signal corresponding to the second port set, it can The second reference signal is sent through the first resource and the second resource. In this way, more reference signal ports can be supported on limited resources, and thus more transmission streams can be supported.
  • the first port set corresponds to the first reference signal.
  • each port in the first port set corresponds to a first reference signal.
  • the second port set corresponds to the second reference signal.
  • each port in the first port set corresponds to a second reference signal.
  • the number of first reference signal ports included in the first port set is smaller than the number of second reference signal ports included in the second port set. That is to say, the number of ports included in the first port set is smaller than the number of ports included in the second port set.
  • Both the first port set and the second port set correspond to the first resource, that is, the first resource can transmit reference signals corresponding to ports in the first port set and reference signals corresponding to ports in the second port set.
  • the first port set may include port 0 and port 1
  • the second port set may include port 4 to port 7.
  • the first port set may include port 0 and port 1
  • the second port set may include port 12 to port 17.
  • the first resource can correspond to different port sets (for example, CDM groups) at the same time, and the numbers of reference signal ports that can be supported by the two port sets corresponding to the first resource are different.
  • the reference signals corresponding to the two port sets can be mapped to some of the same time-frequency resources, thereby increasing the number of ports corresponding to the time-frequency resources, and further supporting more transmission streams.
  • the method further includes:
  • S603 The sending device acquires the first sequence and/or the second sequence.
  • the first sequence corresponds to the first resource, specifically, elements in the first sequence correspond to REs in the first resource one by one.
  • the second sequence corresponds to the first resource and the second resource, specifically, elements in the second sequence correspond to REs in the first resource and the second resource one by one.
  • the number of elements contained in the first sequence is different from the number of elements contained in the second sequence.
  • the first sequence may be a mask sequence, for example, an orthogonal mask sequence.
  • the first sequence may belong to a first sequence set, and sequences in the first sequence set correspond to ports of the first reference signal (ie, ports in the first port set) in one-to-one correspondence.
  • the number of elements contained in each sequence in the first sequence set is 2, that is, the number of elements contained in each sequence in the first sequence set is 2.
  • the sequences in the first sequence set may be orthogonal to each other.
  • the first sequence set may include: ⁇ +1,+1 ⁇ and ⁇ +1,-1 ⁇
  • the port of the first reference signal may be in CDM group 0 port 0 and port 1.
  • Port 0 corresponds to the sequences ⁇ +1,+1 ⁇ and ⁇ +1,-1 ⁇ ;
  • port 1 corresponds to the sequence ⁇ +1,-1 ⁇ .
  • the first sequence set may include: ⁇ +1,+1 ⁇ and ⁇ +1,-1 ⁇
  • the port of at least one first reference signal may be port 4 in CDM group 2 and port 5.
  • Port 4 corresponds to the sequence ⁇ +1,+1 ⁇
  • port 5 corresponds to the sequence ⁇ +1,-1 ⁇ .
  • the sending device may acquire the first sequence when the reference signal corresponding to the port in the first port set is to be sent. For example, when the sending device wants to send the transport stream, it may select the sequence corresponding to the DMRS port (that is, the first sequence) from the first sequence set according to the DMRS port corresponding to the transport stream.
  • the first sequence set may be stipulated by the agreement, or may be determined in other ways, which is not limited in the present application.
  • the sending device may send the first reference signal corresponding to the first sequence through steps A1-A2 according to the first sequence.
  • the receiving device receives the first reference signal corresponding to the first sequence from the sending device.
  • A1 The sending device maps the first reference signal to the first resource according to the first sequence.
  • the sending device may map the first reference signal corresponding to the first sequence to the corresponding time-frequency resource after multiplying the first sequence by the preset time-frequency resource mapping rule.
  • the specific mapping method is as described above, and will not be repeated here.
  • Example 1 For a single symbol Type 1 DMRS, the first sequence is ⁇ +1,+1 ⁇ , ⁇ +1,+1 ⁇ corresponds to port 0 in CDM group 0, and the first sequence A resource includes RE0 and RE2.
  • the DMRS corresponding to port 0 is multiplied by ⁇ +1,+1 ⁇ through a preset time-frequency resource mapping rule, and then mapped to RE0 and RE2.
  • Example 2 Another example (hereinafter referred to as Example 2), see Figure 5, for the single symbol Type 2 DMRS, the first sequence is ⁇ +1,+1 ⁇ , ⁇ +1,+1 ⁇ corresponds to port 0 in CDM group 0,
  • the first resource includes RE0 and RE1.
  • the DMRS corresponding to port 0 is multiplied by ⁇ +1,+1 ⁇ through a preset time-frequency resource mapping rule, it is mapped to RE0 and RE1.
  • A2 The sending device sends the first reference signal by using the first resource.
  • the receiving device receives the first reference signal through the first resource.
  • the sending device can send the DMRS corresponding to port 0 through RE0 and RE1.
  • the sending device can send the DMRS corresponding to port 0 through RE0 and RE2.
  • the second sequence may be a mask sequence, for example, an orthogonal mask sequence.
  • the second sequence may belong to a second sequence set, and the sequences in the second sequence set are in one-to-one correspondence with the ports of the at least one second reference signal (ie, the ports in the second port set).
  • the number of elements contained in each sequence in the second sequence set is 4, 6, 8 or 12, that is, the number of elements contained in each sequence in the second sequence set is 4, 8, or 12.
  • 6, 8 or 12 also referred to as a sequence length of 4, 6, 8 or 12, or as 4 long sequences, 6 long sequences, 8 long sequences or 12 long sequences.
  • the sequences in the second sequence set may be orthogonal to each other.
  • the second sequence set can contain 4 sequences; when the number of elements contained in each sequence in the second sequence set is 6, The second sequence set can contain 6 sequences; when the number of elements contained in each sequence in the second sequence set is 8, the second sequence set can contain 8 sequences; when each sequence in the second sequence set When the number of contained elements is 12, the second sequence set may contain 12 sequences.
  • the second sequence set may be stipulated by the protocol, or may be determined in other ways (for example, the sending device is based on the formulas in Implementation Mode 1 to Implementation Mode 7 below (such as formula (2.A), formula (2. .B), formula (4.A) or formula (4.A)) generated), the application is not limited to this.
  • the relationship between the sequences in the first sequence set and the sequences in the second sequence set may include one of the following:
  • Any sequence in the first sequence set is orthogonal to any sequence in the first subset in the second sequence set, and the cross-correlation coefficient with any sequence other than the first subset in the second sequence set is
  • the first subset may include half of the sequences in the second sequence set. For example, when the second sequence set contains 6 sequences, the first subset contains 3 sequences in the second sequence set.
  • Any sequence in the first sequence set is orthogonal to any sequence in the first subset in the second sequence set, and the cross-correlation coefficient with any sequence other than the first subset in the second sequence set is
  • the first subset may include half of the sequences in the second sequence set. For example, when the second sequence set contains 4 sequences, the first subset contains 2 sequences in the second sequence set.
  • Any sequence in the first sequence set is orthogonal to any sequence in the first subset in the second sequence set, and the cross-correlation coefficient with any sequence other than the first subset in the second sequence set is
  • the first subset may include half of the sequences in the second sequence set. For example, when the second sequence set contains 12 sequences, the first subset contains 6 sequences in the second sequence set.
  • the sending device may send the second reference signal through steps B1-B2 according to the second sequence.
  • the receiving device receives the second reference signal corresponding to the second sequence from the sending device.
  • the sending device maps the second reference signal to the first resource and the second resource according to the second sequence.
  • the sending device may multiply the second reference signal corresponding to the second sequence by the second sequence and map it to the corresponding time-frequency resource according to the time-frequency resource mapping rule in one of the following implementations 1 to 7. superior.
  • a reference signal symbol of the second reference signal is mapped to each RE of the time-frequency resource block.
  • the reference signal symbol is the product of the DMRS reference signal sequence element corresponding to the DMRS port in the RE and the corresponding sequence (eg, second sequence) element.
  • the second sequence includes 6 elements
  • the second sequence corresponds to port 12 in CDM group 3
  • the first resource includes RE0 and RE1
  • the second resource includes RE2 to RE5.
  • the DMRS corresponding to port 12 is mapped to RE0 to RE5 after being multiplied by the 6 elements of the second sequence by the time-frequency resource mapping rule in Implementation Mode 1 or Implementation Mode 2 below.
  • the second sequence includes 4 elements, the second sequence corresponds to port 4 in CDM group 3, the first resource includes RE0 and RE2, and the second resource includes RE1 and RE3 .
  • the DMRS corresponding to port 4 is mapped to RE0 to RE4 after being multiplied by the 4 elements of the second sequence by the time-frequency resource mapping rule in Implementation Mode 3 or Implementation Mode 4 below.
  • the second sequence includes 12 elements, the second sequence corresponds to port 12 in CDM group 3, the first resource includes RE0 and RE1, and the second resource includes RE2 to RE11 .
  • the DMRS corresponding to port 12 is mapped to RE0 to RE11 after being multiplied by the 12 elements of the second sequence by the time-frequency resource mapping rule in Implementation Mode 5 or Implementation Mode 6 below.
  • the sending device sends the second reference signal by using the first resource and the second resource.
  • the receiving device sends the second reference signal corresponding to the second sequence by using the first resource and the second resource.
  • the sending device may send the DMRS corresponding to port 12 through RE0 to RE5.
  • the sending device may send the DMRS corresponding to port 4 through RE0 to RE3.
  • the sending device may send the DMRS corresponding to port 12 through RE0 to RE11.
  • each orthogonal sequence includes 6 elements, and each sequence corresponds to a newly added DMRS port. That is to say, each orthogonal sequence can be used to map its corresponding newly added DMRS port to time-frequency resources. Therefore, six DMRS ports can be added.
  • Each orthogonal mask sequence included in the second set of sequences may be a row vector of matrix b.
  • the matrix b is:
  • b is a 6*6 matrix, where each row vector corresponds to an orthogonal mask sequence of length 6.
  • the matrix b corresponds to the second sequence set, where the 6 orthogonal mask sequences included in the second sequence set correspond to the 6 row vectors in the matrix b one by one. Any two mask sequences contained in the second sequence set are orthogonal to each other.
  • the DMRS mask sequences with a length of 6 generated according to formula (2.A) and formula (2.B) are shown in Table 3 and Table 4 respectively.
  • Table 3 length is 6 DMRS port mask sequences (corresponding formula 2.A)
  • the 6 orthogonal mask sequences included in the second sequence set are:
  • Table 4 length is 6 DMRS port mask sequences (corresponding formula 2.B)
  • the 6 orthogonal mask sequences included in the second sequence set are:
  • the tables in this application are only examples, and other forms of expression may also be used, which is not limited in this application.
  • the correspondence between the index and the element in the table can also be other correspondences
  • the correspondence between the sequence index in the table and the row vector corresponding to a row in the table can also be other correspondences
  • the correspondence between the sequence index in the table and the mask sequence The relationship can also be other corresponding relationships
  • the elements listed in the table may be part or all.
  • Table 3 or Table 4 includes 6 mask sequences of length 6. Wherein, each mask sequence with a length of 6 corresponds to a newly added DMRS port. Therefore, a total of 6 DMRS ports (which may be referred to as newly added ports in this application) can be added. An element included in each sequence corresponds to an RE included in the time-frequency resource block shown in FIG. 7 .
  • a DMRS port corresponds to a mask sequence with a length of 6 in Table 3 or Table 4, and the corresponding rules between the elements contained in the mask sequence and the REs contained in the time-frequency resource block are shown in FIG. 7 .
  • a mask sequence contains 6 elements, corresponding to the mask sequence element index 0 to index 5 in Table 3 or Table 4, and the number marked in each RE in Figure 7 indicates the index of the mask sequence element.
  • the mask sequence elements corresponding to the mask sequence element indexes 0 to 5 in Table 3 or Table 4 respectively correspond to the 6 subcarriers of the first OFDM symbol (for example, correspond to RE0 to RE5 respectively).
  • FIG. 7 is only an example and not a limitation.
  • FIG. 7 may be a diagram of a part of REs or all REs, that is, RE0 to RE5 in the figure may represent any group of resource blocks, and symbol 0 may also be any other OFDM symbol, which is not limited in this application.
  • the newly added DMRS port and the existing NR Type 2 DMRS port are located between the above six REs
  • the multiplexing relationship in the time-frequency resource block is shown in FIG. 8 .
  • the existing NR Type 2 DMRS 6 ports are mapped according to the time-frequency resource mapping method of the existing protocol.
  • One DMRS port corresponds to a mask sequence with a length of 2 and is mapped to two consecutive subcarriers.
  • For the newly added 6 DMRS ports corresponding to port indexes 12 to 17, different 6 long mask sequences are used to multiplex on all 6 REs.
  • DMRS port 0 adopts a mask sequence with a length of 2, which is mapped on subcarrier 0 and subcarrier 1 (ie, RE0 and RE1) corresponding to one OFDM symbol.
  • the DMRS port 12 adopts a mask sequence with a length of 6, and is mapped on subcarrier 0 to subcarrier 5 (ie, RE1 to RE5 ) corresponding to one OFDM symbol.
  • any two mask sequences are orthogonal, that is, the 6-length mask sequences corresponding to any two ports in the newly added ports are orthogonal .
  • the mask sequence corresponding to any one of the existing Type 2 DMRS ports is orthogonal to 3 of the 6 new mask sequences shown in Table 3 or Table 4, and is orthogonal to the remaining
  • the cross-correlation coefficient between any one of the three mask sequences is
  • the existing NR Type 2 DMRS ports are arranged in the time-frequency resource block composed of the above six REs according to the corresponding rules of the mask sequence element index and time-frequency resources shown in Figure 7, the existing NR Type 2 DMRS
  • the mask sequence corresponding to the port can be expressed as:
  • the corresponding DMRS mask sequence extended to length 6 can be expressed as ⁇ +1,+1,0,0,0 ⁇ .
  • This sequence is orthogonal to the mask sequences whose sequence indexes are 0, 2, and 4 in Table 3 or Table 4, and the cross-correlation coefficient with the mask sequences whose sequence indexes are 1, 3, and 5 in Table 3 or Table 4 is
  • half of the sequence is orthogonal to the mask sequence corresponding to the existing DMRS port, and the other half maintains low cross-correlation characteristics for the mask sequence corresponding to the existing DMRS port , so that the quality of the channel estimation can be guaranteed to the greatest extent.
  • the mth reference sequence element r(m) in the corresponding reference signal sequence is mapped to the RE with index (k, l) p, ⁇ according to the following rules.
  • the RE with index (k, l) p, ⁇ corresponds to the OFDM symbol with index l in a time slot in the time domain, and corresponds to the subcarrier with index k in the frequency domain
  • the mapping rule satisfies:
  • n 0,1,...;
  • 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.
  • This implementation method expands the port capacity of NR Type 2 single-symbol DMRS.
  • the existing NR Type 2 single-symbol DMRS port and the newly added DMRS port use a mask sequence with a length of 2 and a mask sequence with a length of 6, respectively.
  • any two of the six length-6 mask sequences are orthogonal. Any one of the mask sequences with a length of 2 is orthogonal to half of the sequences in the set of mask sequences with a length of 6, and ensures extremely low cross-correlation with the remaining half of the sequences.
  • the DMRS ports with semi-orthogonal or low cross-correlation characteristics can be reused to double the capacity of DMRS ports, and the interference between the original port and the newly added port of the protocol can be minimized , to ensure the quality of channel estimation.
  • the newly designed mask sequence with a length of 6 takes into account the cross-correlation characteristics with the existing NR Type 2 orthogonal mask sequence with a length of 2.
  • the semi-orthogonal and low cross-correlation features between the new sequence and the existing sequence can be fully utilized to allocate different DMRS ports to users in different situations. For example, orthogonal sequences can be allocated to users with greater interference, and non-orthogonal sequences with low cross-correlation can be allocated to users with less interference, so as to minimize the loss of channel estimation caused by non-orthogonal ports.
  • each orthogonal mask sequence included in the second sequence set may be a row vector of the matrix b.
  • the matrix b is:
  • b is a 6*6 matrix, where each row vector corresponds to a mask sequence of length 6.
  • the matrix b corresponds to the second sequence set, where the 6 orthogonal mask sequences included in the second sequence set correspond to the 6 row vectors in the matrix b one by one. Any two mask sequences contained in the second sequence set are orthogonal to each other.
  • the DMRS mask sequences with a length of 6 generated according to formula (4.A) and formula (4.B) are shown in Table 8 and Table 9 respectively.
  • the 6 orthogonal mask sequences included in the second sequence set are:
  • the 6 orthogonal mask sequences included in the second sequence set are:
  • each mask sequence corresponds to a DMRS port. Therefore, a total of 6 DMRS ports (which may be referred to as newly added ports in this application) are newly added.
  • An element included in each sequence corresponds to an RE included in the time-frequency resource block shown in FIG. 7 .
  • a DMRS port corresponds to a mask sequence with a length of 6 in Table 8 or Table 9, and the corresponding rules between the elements contained in the mask sequence and the REs contained in the time-frequency resource block are shown in FIG. 7 .
  • a mask sequence contains 6 elements, corresponding to the mask sequence element index 0 to index 5 in Table 8 or Table 9, and the number marked in each RE in Figure 7 indicates the index of the mask sequence element.
  • the mask sequence elements corresponding to the mask sequence element indexes 0 to 5 in Table 8 or Table 9 respectively correspond to the 6 subcarriers of the first OFDM symbol (for example, correspond to RE0 to RE5 respectively).
  • the multiplexing of the newly added DMRS port and the existing NR Type 2 single-symbol DMRS port in the time-frequency resource blocks of the above six REs The relationship is shown in Figure 8.
  • the 6 ports of the existing NR Type 2 DMRS single symbol are mapped according to the time-frequency resource mapping method of the existing protocol.
  • One DMRS port corresponds to a mask sequence with a length of 2, and is mapped to two consecutive subcarriers.
  • For the newly added 6 DMRS ports corresponding to port indexes 12 to 17, different 6 long mask sequences are used to multiplex on all 6 REs.
  • DMRS port 0 adopts a mask sequence with a length of 2, which is mapped on subcarrier 0 and subcarrier 1 (ie, RE0 and RE1) corresponding to one OFDM symbol.
  • the DMRS port 12 adopts a mask sequence with a length of 6, and is mapped on subcarrier 0 to subcarrier 5 (ie, RE1 to RE5) corresponding to one OFDM symbol.
  • any two mask sequences are orthogonal, that is, the mask sequences with a length of 6 corresponding to any two ports in the newly added ports are orthogonal .
  • the correlation coefficient between the mask sequence corresponding to any one of the existing Type 2 DMRS ports and any one of the six mask sequences shown in Table 8 or Table 9 is
  • the corresponding DMRS mask sequence extended to length 6 can be expressed as ⁇ +1,+1,0,0,0 ⁇ .
  • the cross-correlation coefficient between this sequence and any mask sequence in Table 8 or Table 9 is
  • the mask sequence corresponding to the newly designed DMRS port maintains an extremely low cross-correlation characteristic with respect to the mask sequence corresponding to the existing DMRS port, so that the quality of channel estimation can be guaranteed to the greatest extent.
  • the mth reference sequence element r(m) in the corresponding reference signal sequence is mapped to the RE with index (k, l) p, ⁇ according to the following rules.
  • the RE with index (k, l) p, ⁇ corresponds to the OFDM symbol with index l in a time slot in the time domain, and corresponds to the subcarrier with index k in the frequency domain
  • the mapping rule satisfies:
  • n 0,1,...;
  • 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.
  • the value of w(k', l') corresponding to DMRS port p in the mapping rule can be determined according to Table 10.
  • the value of w(k', l') corresponding to DMRS port p in the mapping rule can be determined according to Table 11.
  • This implementation method 2 expands the port capacity of NR Type 2 single-symbol DMRS.
  • the existing NR Type 2 single-symbol DMRS port and the newly added DMRS port use a mask sequence with a length of 2 and a mask sequence with a length of 6, respectively.
  • any two of the six length-6 mask sequences are orthogonal. Any sequence in the mask sequence with a length of 2 and any sequence in the set of mask sequences with a length of 6 guarantee extremely low cross-correlation.
  • non-orthogonal DMRS ports with low cross-correlation characteristics can be reused without increasing time-frequency resources to achieve double the expansion of DMRS ports, and minimize the interference between the original port and the newly added port of the protocol. Guarantees the quality of the channel estimate.
  • each orthogonal sequence includes 4 elements, and each sequence corresponds to a newly added DMRS port. That is to say, each orthogonal sequence can be used to map its corresponding newly added DMRS port to time-frequency resources. Therefore, it is possible to add four DMRS ports.
  • Each orthogonal mask sequence included in the second set of sequences is related to matrix b.
  • the matrix b is:
  • the 4 orthogonal mask sequences included in the second sequence set are in one-to-one correspondence with the 4 row vectors in the matrix b.
  • Each orthogonal mask sequence in the second sequence set contains 4 elements in the corresponding row vector.
  • the 4 row vectors may be any 4 row vectors among the 6 row vectors in the matrix b.
  • elements contained in different orthogonal mask sequences in the second sequence set correspond to the same column of the matrix b.
  • the second sequence set contains sequence 1 to sequence 4, respectively corresponding to the row vectors of rows 1 to 4 in matrix b, and sequence 1 to sequence 4 respectively contain the first 4 elements in the corresponding row in matrix b (for example, the table 12 or Table 13), or sequence 1 to sequence 4 respectively contain the last 4 elements in the corresponding row in matrix b, or sequence 1 to sequence 4 respectively contain the middle 4 elements in the corresponding row in matrix b, sequence 1 to sequence 4 contains the 1st, 3rd, 4th, and 5th elements in the corresponding row in matrix b, respectively.
  • Table 12 length is 4 DMRS port mask sequences (corresponding formula 2.A)
  • the 4 orthogonal I code sequences contained in the second sequence set are respectively:
  • Table 13 length is 4 DMRS port mask sequences (corresponding formula 2.B)
  • the four orthogonal mask sequences included in the second sequence set are:
  • the second sequence set obtained through the implementation manner 3 may include 4 mask sequences with a length of 4.
  • each mask sequence with a length of 4 corresponds to a newly added DMRS port. Therefore, a total of 4 DMRS ports can be added (which may be referred to as newly added ports in this application).
  • An element included in each sequence corresponds to an RE included in the time-frequency resource block shown in FIG. 9 .
  • a DMRS port corresponds to a mask sequence with a length of 4 (for example, a mask sequence shown in Table 12 or Table 13), and the elements contained in the mask sequence correspond to the REs contained in the time-frequency resource block.
  • the rules are shown in Figure 9.
  • a mask sequence contains 4 elements, corresponding to the mask sequence element index 0 to index 3 in Table 12 or Table 13, and the number marked in each RE in Figure 9 indicates the index of the mask sequence element.
  • the mask sequence elements corresponding to the mask sequence element indexes 0 to 3 in Table 12 or Table 13 respectively correspond to the 4 subcarriers of the first OFDM symbol (for example, correspond to RE0 to RE3 respectively).
  • FIG. 9 is only an example and not a limitation.
  • FIG. 9 may be a diagram of a part of REs or all REs, that is, RE0 to RE3 in the figure may represent any group of resource blocks, and symbol 0 may also be any other OFDM symbol, which is not limited in this application.
  • the multiplexing relationship between the newly added DMRS port and the existing NR Type 1 DMRS port in the time-frequency resource blocks of the above four REs is shown in Figure 10 shown.
  • the existing 4 ports of NR Type 1 DMRS are mapped according to the time-frequency resource mapping method of the existing protocol.
  • One DMRS port corresponds to a mask sequence of length 2, which is mapped to two consecutive subcarriers.
  • For the newly added 4 DMRS ports corresponding to port indexes 12-15, different 4 long mask sequences are used to multiplex on all 4 REs.
  • DMRS port 0 adopts a mask sequence of length 2, which is mapped on subcarrier 0 and subcarrier 2 (ie, RE0 and RE2) corresponding to one OFDM symbol.
  • DMRS port 4 adopts a mask sequence with a length of 4, and is mapped on subcarrier 0 to subcarrier 3 (ie, RE1 to RE3) corresponding to one OFDM symbol.
  • any two mask sequences are orthogonal, that is, the 4-length mask sequences corresponding to any two ports in the newly added ports are orthogonal .
  • the mask sequence corresponding to any one of the existing Type 1 DMRS ports is orthogonal to two of the four new mask sequences shown in Table 12 or Table 13, and is orthogonal to the remaining The cross-correlation coefficient between any one of the two mask sequences is
  • the existing NR Type 1 DMRS ports are arranged in the time-frequency resource block composed of the above four REs according to the corresponding rules of the mask sequence element index and time-frequency resources shown in Figure 9, the existing NR Type 1 DMRS
  • the mask sequence corresponding to the port can be expressed as:
  • the corresponding DMRS mask sequence extended to length 4 can be expressed as ⁇ +1,+1,0,0 ⁇ .
  • This sequence is orthogonal to the mask sequences whose sequence indexes are 0 and 2 in Table 12 or Table 13, and the cross-correlation coefficient with the mask sequences whose sequence indexes are 1 and 3 in Table 12 or Table 13 is
  • half of the sequence is orthogonal to the mask sequence corresponding to the existing DMRS port, and the other half maintains low cross-correlation characteristics for the mask sequence corresponding to the existing DMRS port , so that the quality of the channel estimation can be guaranteed to the greatest extent.
  • the mth reference sequence element r(m) in the corresponding reference signal sequence is mapped to the RE with index (k, l) p, ⁇ according to the following rules.
  • the RE with index (k, l) p, ⁇ corresponds to the OFDM symbol with index l in a time slot in the time domain, and corresponds to the subcarrier with index k in the frequency domain
  • the mapping rule satisfies:
  • n 0,1,...;
  • 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.
  • the values of w f (k'), w t (l') and ⁇ corresponding to DMRS port p in the mapping rule can be determined according to Table 15.
  • This implementation method expands the port capacity of NR Type 1 single-symbol DMRS.
  • the existing NR Type 1 single-symbol DMRS port and the newly added DMRS port use a mask sequence with a length of 2 and a mask sequence with a length of 4, respectively.
  • any two of the four mask sequences of length 4 are orthogonal. Any sequence in the mask sequence with a length of 2 is orthogonal to a part of the sequence (for example, half of the sequences) in the set of mask sequences with a length of 4, and ensures extremely low cross-correlation with the remaining part of the sequence.
  • the DMRS ports with semi-orthogonal or low cross-correlation characteristics can be reused to double the capacity of DMRS ports, and the interference between the original port and the newly added port of the protocol can be minimized , to ensure the quality of channel estimation.
  • the newly designed mask sequence of length 4 takes into account the cross-correlation properties with the existing NR Type 1 orthogonal mask sequence of length 2.
  • the semi-orthogonal and low cross-correlation features between the new sequence and the existing sequence can be fully utilized to allocate different DMRS ports to users in different situations. For example, orthogonal sequences can be allocated to users with greater interference, and non-orthogonal sequences with low cross-correlation can be allocated to users with less interference, so as to minimize the loss of channel estimation caused by non-orthogonal ports.
  • Each orthogonal mask sequence included in the second set of sequences is related to matrix b.
  • the matrix b is:
  • the 4 orthogonal mask sequences included in the second sequence set are in one-to-one correspondence with the 4 row vectors in the matrix b.
  • Each orthogonal mask sequence in the second sequence set contains 4 elements in the corresponding row vector.
  • the 4 row vectors may be any 4 row vectors among the 6 row vectors in the matrix b.
  • elements contained in different orthogonal mask sequences in the second sequence set correspond to the same column of the matrix b.
  • the second sequence set contains sequence 1 to sequence 4, respectively corresponding to the row vectors of rows 1 to 4 in matrix b, and sequence 1 to sequence 4 respectively contain the first 4 elements in the corresponding row in matrix b (for example, the table 17 or Table 18), or sequence 1 to sequence 4 respectively contain the last 4 elements in the corresponding row in matrix b, or sequence 1 to sequence 4 respectively contain the middle 4 elements in the corresponding row in matrix b, sequence 1 to sequence 4 contains the 1st, 3rd, 4th, and 5th elements in the corresponding row in matrix b, respectively.
  • the four orthogonal mask sequences included in the second sequence set are:
  • the four orthogonal mask sequences included in the second sequence set are:
  • the second sequence set obtained through implementation manner 4 may include 4 mask sequences with a length of 4.
  • each mask sequence with a length of 4 corresponds to a DMRS port. Therefore, a total of 4 DMRS ports are newly added (which may be referred to as newly added ports in this application).
  • An element included in each sequence corresponds to an RE included in the time-frequency resource block shown in FIG. 9 .
  • a DMRS port corresponds to a mask sequence with a length of 4 (for example, a mask sequence shown in Table 17 or Table 18), and the elements contained in the mask sequence correspond to the REs contained in the time-frequency resource block
  • the rules are shown in Figure 9.
  • a mask sequence contains 4 elements, which respectively correspond to the mask sequence element index 0 to index 3 in Table 17 or Table 18.
  • the number marked in each RE in Figure 9 indicates the index of the mask sequence element.
  • the mask sequence elements corresponding to the mask sequence element indexes 0 to 3 in Table 17 or Table 18 respectively correspond to the 4 subcarriers of the first OFDM symbol (for example, correspond to RE0 to RE3 respectively).
  • the newly added DMRS port and the existing NR Type 1 single-symbol DMRS The multiplexing relationship of ports in the time-frequency resource blocks of the above four REs is shown in FIG. 10 .
  • the four existing NR Type 1 DMRS single-symbol ports are mapped according to the time-frequency resource mapping method of the existing protocol.
  • One DMRS port corresponds to a mask sequence of length 2, which is mapped to two consecutive subcarriers.
  • For the newly added 4 DMRS ports corresponding to port indexes 12 to 15, different 4 long mask sequences are used to multiplex on all 4 REs.
  • DMRS port 0 adopts a mask sequence of length 2, which is mapped on subcarrier 0 and subcarrier 2 (ie, RE0 and RE2) corresponding to one OFDM symbol.
  • the DMRS port 4 adopts a mask sequence with a length of 4, and is mapped on subcarrier 0 to subcarrier 3 (ie, RE1 to RE3) corresponding to one OFDM symbol.
  • any two mask sequences are orthogonal, that is, the mask sequences of length 4 corresponding to any two ports in the newly added ports are orthogonal .
  • the correlation coefficient between the mask sequence corresponding to any one of the existing Type 1 DMRS ports and any one of the four mask sequences shown in Table 17 or Table 18 is
  • the corresponding DMRS mask sequence extended to length 4 can be expressed as ⁇ +1,+1,0,0 ⁇ .
  • the cross-correlation coefficient between this sequence and any mask sequence in Table 17 or Table 18 is
  • the mask sequence corresponding to the newly designed DMRS port maintains an extremely low cross-correlation characteristic with respect to the mask sequence corresponding to the existing DMRS port, so that the quality of channel estimation can be guaranteed to the greatest extent.
  • the mth reference sequence element r(m) in the corresponding reference signal sequence is mapped to the RE with index (k, l) p, ⁇ according to the following rules.
  • the RE with index (k, l) p, ⁇ corresponds to the OFDM symbol with index l in a time slot in the time domain, and corresponds to the subcarrier with index k in the frequency domain
  • the mapping rule satisfies:
  • n 0,1,...;
  • 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.
  • the value of w(k', l') corresponding to DMRS port p in the mapping rule can be determined according to Table 19.
  • the value of w(k', l') corresponding to DMRS port p in the mapping rule can be determined according to Table 20.
  • This implementation method 4 expands the port capacity of NR Type 1 single-symbol DMRS.
  • the existing NR Type 1 single-symbol DMRS port and the newly added DMRS port use a mask sequence with a length of 2 and a mask sequence with a length of 4, respectively.
  • any two of the four mask sequences of length 4 are orthogonal. Any sequence in the mask sequence with a length of 2 and any sequence in the set of mask sequences with a length of 4 guarantee extremely low cross-correlation.
  • non-orthogonal DMRS ports with low cross-correlation characteristics can be reused without increasing time-frequency resources to achieve double the expansion of DMRS ports, and minimize the interference between the original port and the newly added port of the protocol. Guarantees the quality of the channel estimate.
  • the present application designs a set of mask sequences (ie, the second sequence set) with a length of 12, wherein one mask sequence set includes 12 mask sequences. Each mask sequence contains 12 elements. Each mask sequence corresponds to a new DMRS port, so at least 12 new DMRS ports can be added.
  • the second sequence set may contain 12 mask sequences, and each mask sequence may contain 12 elements. Represent a mask sequence as a row vector, and a matrix of 12 mask sequences in the form of row vectors The following relationship can be satisfied:
  • the matrix B corresponds to the second sequence set, wherein the 12 mask sequences included in the second sequence set correspond to the 12 row vectors in the matrix B one by one. Any two mask sequences contained in the second sequence set are orthogonal to each other.
  • the DMRS mask sequences with a length of 12 generated according to formula (8.A), formula (8.B) and formula (8.C) are shown in Table 21, Table 22 and Table 23 respectively.
  • the tables in this application are only used as an example and not limiting.
  • the correspondence between the index and the element in the table can also be other correspondences, and the correspondence between the sequence index in the table and the row vector corresponding to a certain row in the table
  • the relationship may also be other correspondences, and the correspondence between the sequence index and the mask sequence in the table may also be other correspondences, and the elements listed in the table may be part, may be all, and so on.
  • Table 21 mask sequence of length 12 (based on formula 8.A)
  • sequences in the second sequence set can be respectively:
  • sequences in the second sequence set can be respectively:
  • sequences in the second sequence set can be: ⁇ 1,j,1,j,1,j,1,j,1,j ⁇ ,
  • each mask sequence corresponds to a DMRS port, so a total of 12 DMRS ports are added (hereinafter referred to as newly added ports) .
  • An element included in each sequence corresponds to an RE included in the time-frequency resource block shown in FIG. 11 .
  • a DMRS port corresponds to a mask sequence with a length of 12 in Table 21, Table 22 or Table 23, and the corresponding rule of the mask sequence element index and the time-frequency resource RE is shown in FIG. 11 .
  • a mask sequence includes 12 elements, corresponding to mask sequence element indexes 0 to 11, and the numbers marked in each RE in FIG. 11 indicate the index of the mask sequence element.
  • the mask sequence elements corresponding to the mask sequence element indexes 0 to 5 in Table 21, Table 22 or Table 23 respectively correspond to the 6 subcarriers of the first OFDM symbol; the mask sequence element indexes in Table 21, Table 22 or Table 23
  • the mask sequence elements corresponding to 6-11 respectively correspond to the 6 subcarriers of the second OFDM symbol.
  • FIG. 11 is only an example and not a limitation.
  • FIG. 11 may be a diagram of a part of REs or all REs, that is, subcarriers 0-5 in the figure may represent any group of resource blocks, and symbols 0-1 may also represent It is other 2 consecutive OFDM symbols, which is not limited in this application.
  • the multiplexing relationship between the newly added DMRS port and the existing NR Type 2 DMRS port in the time-frequency resource blocks of the above 12 REs is shown in Figure 12 shown.
  • the 12 ports of the existing NR Type 2 DMRS are mapped according to the time-frequency resource mapping method of the existing protocol.
  • One DMRS port corresponds to a mask sequence with a length of 4 and is mapped to two consecutive subcarriers.
  • For the newly added 12 DMRS ports corresponding to port indexes 12 to 23, different 12 long mask sequences are used to multiplex on all 12 REs.
  • DMRS port 0 adopts a mask sequence with a length of 4, and is mapped on subcarrier 0 and subcarrier 1 corresponding to two OFDM symbols.
  • the DMRS port 12 uses a mask sequence with a length of 12, and is mapped on subcarriers 0 to 5 corresponding to two OFDM symbols.
  • the first element in the sequence corresponds to the RE with index 0
  • the second element corresponds to the RE with index 1
  • the third element corresponds to the RE with index 2, and so on.
  • any two mask sequences are orthogonal, that is, the 12 long mask sequences corresponding to any two ports in the newly added ports are Orthogonal.
  • the mask sequence corresponding to any one of the existing Type 2 DMRS ports is orthogonal to 6 of the 12 new mask sequences shown in Table 21, Table 22 or Table 23 , and the cross-correlation coefficient between any one of the remaining 6 mask sequences is Specifically, the existing NR Type 2 DMRS ports are arranged in the time-frequency resource block composed of the above 12 REs according to the mask sequence element index and time-frequency resource correspondence rules shown in Figure 11, and the existing NR Type 2 DMRS ports correspond to The mask sequence of can be expressed as:
  • the existing NR Type 2 DMRS port 0 according to the rules shown in Figure 11, the corresponding DMRS mask sequence length extended to 12 can be expressed as ⁇ +1 +1 0 0 0 0 +1 +1 0 0 0 ⁇ .
  • This sequence is orthogonal to the new mask sequences with sequence indexes 6 to 11 in Table 21, Table 22 or Table 23, and is orthogonal to the new mask sequences with sequence indexes 0 to 5 in Table 21, Table 22 or Table 23.
  • the correlation coefficient is Taking the new mask sequence whose sequence index is 0 in Table 21 as an example, the cross-correlation coefficient between it and the DMRS mask sequence corresponding to the existing NR Type 2 DMRS port 0 is:
  • half of the sequence is orthogonal to the mask sequence corresponding to the existing DMRS port, and the other half of the mask sequence corresponding to the existing DMRS port maintains low cross-correlation characteristics , so that the quality of the channel estimation can be guaranteed to the greatest extent.
  • the mth element r(m) in the DMRS base sequence corresponding to port p among the newly added 12 DMRS ports is mapped to the RE with index (k,l) p, ⁇ according to the following rules .
  • the RE with index (k, l) p, ⁇ corresponds to the OFDM symbol with index l in a time slot in the time domain, and corresponds to the subcarrier with index k in the frequency domain
  • the mapping rule satisfies:
  • p is the index of the DMRS port, is the symbol index of the start OFDM symbol occupied by the DMRS modulation symbol or the symbol index of the reference OFDM symbol
  • w f (k′) is the frequency-domain mask sequence element corresponding to the subcarrier with index k’
  • w t (l′) is the element of the time-domain mask sequence corresponding to the OFDM symbol whose index is l'
  • c(n) is the element mapped to the kth subcarrier and the lth symbol of the block sequence.
  • Table 25 new design length is 12 mask sequence corresponding mapping rules (corresponding table 21)
  • Table 26 new design length is 12 mask sequence corresponding mapping rules (corresponding table 22)
  • Table 27 new design length is 12 mask sequence corresponding mapping rules (corresponding table 23)
  • N is twice the number of RBs included in the bandwidth occupied by the DMRS signal in the frequency domain
  • v may be a number that is relatively prime to N.
  • the port of NR Type 2 DMRS is expanded.
  • the existing NR Type 2 DMRS port and the newly added DMRS port adopt a mask sequence with a length of 4 and a mask sequence with a length of 12 respectively. mask sequence.
  • any two of the 12 length-12 mask sequences are orthogonal. Any one of the mask sequences with a length of 4 is orthogonal to half of the sequences in the set of mask sequences with a length of 12, and guarantees low cross-correlation with the remaining half of the sequences. Therefore, the expansion of the DMRS port can be doubled without increasing the time-frequency resources, and the interference between the original port and the newly added port of the protocol can be reduced to the greatest extent, so as to ensure the quality of channel estimation.
  • a matrix of masked sequences contained in the second sequence set in the form of row vectors The following relationship can be satisfied:
  • the DMRS mask sequences with a length of 12 generated according to formula (11.A) and formula (11.B) are shown in Table 28 and Table 29 respectively.
  • Table 28 mask sequence of length 12 (based on formula 11.A)
  • sequences in the second sequence set can be respectively:
  • sequences in the second sequence set can be respectively:
  • each mask sequence corresponds to a DMRS port, so a total of 12 DMRS ports are newly added (hereinafter referred to as newly added ports).
  • An element included in each sequence corresponds to an RE included in the time-frequency resource block shown in FIG. 13 .
  • a mask sequence contains 12 elements, corresponding to mask sequence element indexes 0 to 11, and the numbers marked in each RE in Figure 13 indicate the index of the mask sequence element.
  • the mask sequence elements corresponding to the mask sequence element indexes 0, 2, 4, 6, 8, and 10 in Table 10 or Table 11 correspond to subcarriers 0, 1, 2, 3, 4, and 5 of the first OFDM symbol respectively ;
  • the mask sequence elements corresponding to the mask sequence element indexes 1, 3, 5, 7, 9, and 11 in Table 10 or Table 11 correspond to subcarriers 0, 1, 2, 3, 4, and 5 of the second OFDM symbol respectively .
  • the multiplexing relationship between the newly added DMRS port and the existing NR Type 2 DMRS port in the time-frequency resource blocks of the above 12 REs is shown in Figure 12 shown.
  • the 12 ports of the existing NR Type 2 DMRS are mapped according to the time-frequency resource mapping method of the existing protocol.
  • One DMRS port corresponds to a mask sequence with a length of 4 and is mapped to two consecutive subcarriers.
  • For the newly added 12 DMRS ports corresponding to port indexes 12 to 23, different 12 long mask sequences are used to multiplex on all 12 REs.
  • DMRS port 0 adopts a mask sequence with a length of 4, and is mapped on subcarrier 0 and subcarrier 1 corresponding to two OFDM symbols.
  • the DMRS port 12 uses a mask sequence with a length of 12, and is mapped on subcarriers 0 to 5 corresponding to two OFDM symbols.
  • any two mask sequences are orthogonal, that is, the 12 long mask sequences corresponding to any two ports in the newly added ports are orthogonal .
  • the correlation coefficient between the mask sequence corresponding to any one of the existing Type 2 DMRS ports and any one of the 12 new mask sequences shown in Table 28 or Table 29 is
  • the corresponding DMRS mask sequence extended to length 12 can be expressed as ⁇ +1 +1 0 0 0 0 +1 +1 0 0 0 ⁇ .
  • the cross-correlation coefficient between this sequence and any new mask sequence in Table 28 or Table 29 is Therefore, for the mask sequence corresponding to the newly designed DMRS port, the mask sequence corresponding to the existing DMRS port maintains an extremely low cross-correlation property, so that the quality of channel estimation can be guaranteed to the greatest extent.
  • the mth element r(m) in the DMRS sequence corresponding to port p among the 12 newly added DMRS ports is mapped to the resource element RE with the index (k,l) p, ⁇ according to the following rules superior.
  • the RE with index (k, l) p, ⁇ corresponds to the OFDM symbol with index l in a time slot in the time domain, and corresponds to the subcarrier with index k in the frequency domain
  • the mapping rule satisfies:
  • p is the index of the DMRS port, is the symbol index of the start OFDM symbol occupied by the DMRS modulation symbol or the symbol index of the reference OFDM symbol
  • w(k′,l′) is the frequency domain mask element corresponding to the subcarrier with the index k’ and the index is l’
  • ⁇ represents the subcarrier spacing parameter, is the power scaling factor.
  • the value of w(k', l') corresponding to DMRS port p can be determined according to Table 12.
  • Table 30 new design length is 12 mask sequence corresponding mapping rules (corresponding table 28)
  • the value of w(k', l') corresponding to DMRS port p can be determined according to Table 31.
  • Table 31 new design length is 12 mask sequence corresponding mapping rules (corresponding table 29)
  • N is twice the number of RBs included in the bandwidth occupied by the DMRS signal in the frequency domain
  • v may be a number that is relatively prime to N.
  • This application is aimed at the port expansion method of NR Type 2 DMRS.
  • the existing NR Type 2 DMRS port and the newly added DMRS port respectively use a mask sequence with a length of 4 and a mask with a length of 12. sequence.
  • any two of the 12 length-12 mask sequences are orthogonal. Any sequence in the mask sequence with a length of 4 and any sequence in the set of mask sequences with a length of 12 guarantee extremely low cross-correlation. Therefore, the expansion of the DMRS port can be doubled without increasing the time-frequency resources, and the interference between the original port and the newly added port of the protocol can be reduced to the greatest extent, so as to ensure the quality of channel estimation.
  • the present application designs a set of mask sequences (ie, the second sequence set) with a length of 8, wherein one mask sequence set includes 8 mask sequences. Each mask sequence contains 8 elements. Each mask sequence corresponds to a new DMRS port, so at least eight DMRS ports can be added.
  • the existing ports and the newly added ports can also be frequency-divided reuse.
  • 12 DMRS ports are divided into 3 CDM groups. Within 6 consecutive sub-carriers and 2 OFDM symbols, it is divided into 3 time-frequency resource sub-blocks, and each time-frequency resource sub-block includes 2 consecutive sub-carriers and 2 OFDM symbols.
  • one time-frequency resource sub-block corresponds to one CDM group.
  • the DMRS signals corresponding to the 4 DMRS ports included in each CDM group are mapped to all REs included in the same resource sub-block.
  • the existing DMRS ports belong to 4 DMRS ports included in 1 CDM group among the 3 CDM groups, and the existing ports occupy one of the 3 time-frequency resource sub-blocks, and the newly added ports can occupy The remaining 2 sub-blocks in the 3 time-frequency resource sub-blocks.
  • existing ports 0 to 3 correspond to CDM group 0, and are mapped to two consecutive subcarriers (subcarrier 0 and subcarrier 1) and two consecutive OFDM symbols ( 4 REs corresponding to symbol 0 and symbol 1).
  • existing ports 0 to 3 can be assigned to existing devices (the existing devices cannot know the newly added ports, and do not have the ability to detect the newly added ports).
  • Newly added ports 4 to 19 correspond to CDM group 1, and are mapped to consecutive 4 subcarriers (subcarrier 2, subcarrier 3, subcarrier 4, subcarrier 5) and consecutive 2 subcarriers based on an orthogonal mask sequence of length 8 On 8 REs corresponding to OFDM symbols (symbol 0 and symbol 1).
  • the newly added ports 4-19 can be assigned to new devices (the newly added ports can be learned and have the ability to detect the newly added ports).
  • the existing port is mapped to two consecutive subcarriers (subcarrier 4 and subcarrier 5) and two consecutive OFDM symbols (symbol 0 and symbol 1) based on an orthogonal mask sequence of length 4 on the corresponding 4 REs.
  • existing ports can be allocated to existing devices (existing devices cannot learn about newly added ports, and do not have the ability to detect newly added ports).
  • the newly added port is mapped to four consecutive subcarriers (subcarrier 0, subcarrier 1, subcarrier 2, subcarrier 3) and two consecutive OFDM symbols (symbol 0 and symbol 1) based on an orthogonal mask sequence of length 8. ) corresponding to 8 REs.
  • the newly added port can be assigned to the new device (the newly added port can be learned and the detection capability of the newly added port can be obtained).
  • the existing DMRS ports belong to 8 DMRS ports contained in 2 CDM groups in the 3 CDM groups, the existing ports can occupy 2 sub-blocks in the 3 time-frequency resource sub-blocks, and the newly added ports The remaining 1 sub-block among the 3 time-frequency resource sub-blocks may be occupied.
  • the existing DMRS port occupies CDM group 0 and CDM group 1, that is, the existing DMRS port is mapped to four consecutive subcarriers (subcarrier 0, subcarrier 1, subcarrier 2, and subcarrier 3).
  • the newly added DMRS port occupies CDM group 2, that is, the existing DMRS port is mapped to two consecutive subcarriers (subcarrier 4 and subcarrier 5).
  • the existing DMRS port occupies the CDM group 1 and the CDM group 2, that is, the existing DMRS port is mapped to four consecutive subcarriers (subcarrier 2, subcarrier 3, subcarrier 4, and subcarrier 5).
  • the newly added DMRS port occupies CDM group 0, that is, the existing DMRS port is mapped to two consecutive subcarriers (subcarrier 0 and subcarrier 1).
  • the existing DMRS ports belong to 4 DMRS ports contained in one of the 3 CDM groups
  • the existing ports occupy one of the 3 time-frequency resource sub-blocks
  • the newly added ports can occupy 3 time-frequency resource sub-blocks
  • multiple mask sequence sets with a length of 8 can also be designed, and one mask sequence set includes 8 mask sequences. Each mask sequence corresponds to a newly added DMRS port.
  • 8 DMRS ports can be added.
  • 16 DMRS ports can be added.
  • the orthogonal mask sequences included in the mask sequence set with a length of 8 are shown in Table 32-Table 34.
  • Each mask sequence in the new mask sequence sets with a length of 8 shown in Table 32 to Table 34 corresponds to a DMRS port (hereinafter referred to as newly added ports).
  • An element included in each sequence corresponds to an RE included in the time-frequency resource block shown in FIG. 15 .
  • the corresponding rule of the mask sequence element index and the time-frequency resource RE is shown in FIG. 14 .
  • the mask sequence elements corresponding to the mask sequence element indexes 0 to 3 in Table 14 to Table 16 correspond to the 4 subcarriers of the first OFDM symbol respectively; the mask sequence elements corresponding to the mask sequence element indexes 4 to 7 in Table 14 to Table 16
  • the code sequence elements respectively correspond to the 4 subcarriers of the second OFDM symbol.
  • FIG. 14 is an example rather than a limitation, and the elements of the mask sequence can also follow other mapping rules.
  • the 8 elements contained in the sequence with a length of 8 can be mapped on subcarriers 0 to 3, and the existing ports correspond to
  • the 4 elements included in the sequence with a length of 4 can be mapped on subcarriers 4-5, which is not limited in this application.
  • the DMRS port corresponding to the mask sequence with a length of 8 (newly designed mask sequence) and the DMRS port corresponding to the mask sequence with a length of 4 (the existing NR mask sequence with a length of 4) are mapped in a frequency division multiplexing manner In the time-frequency resource block of 12 REs.
  • the corresponding relationship between DMRS ports, mask sequence sets and REs contained in time-frequency resource blocks is shown in Figure 14 .
  • DMRS symbols corresponding to 4 DMRS ports are mapped, and the 4 REs correspond to existing mask sequences with NR length 4 respectively.
  • 8 REs composed of subcarrier 2 to subcarrier 5 corresponding to OFDM symbol 0 and symbol 1 DMRS symbols corresponding to 16 DMRS ports are mapped, corresponding to port indexes 4 to 19, and different 8 long mask sequences are used to multiplex in All 8 REs.
  • DMRS port 0 adopts a mask sequence with a length of 4, and is mapped on subcarrier 0 and subcarrier 1 corresponding to two OFDM symbols.
  • the DMRS port 4 adopts a mask sequence with a length of 8, and is mapped on subcarriers 2 to 5 corresponding to two OFDM symbols.
  • any two mask sequences in each mask sequence set are orthogonal.
  • each mask sequence set selects a mask sequence, then the cross-correlation coefficient between the two mask sequences is
  • the DMRS resource mapping method shown in Figure 14 reserves a mask sequence group with a length of 4, which can be used to be compatible with the existing NR Type 2 DMRS.
  • a new mask sequence group with a length of 8 is added, and the cross-correlation between the mask sequences in this sequence group is low, so that it can ensure multiplexing of more DMRS ports in fixed time-frequency resources while , to ensure the channel estimation performance.
  • the port p among the 20 DMRS ports corresponds to the mth r(m) in the DMRS sequence, and is mapped to the RE whose index is (k, l) p, ⁇ according to the following rules.
  • the RE with index (k, l) p, ⁇ corresponds to the OFDM symbol with index l in a time slot in the time domain, and corresponds to the subcarrier with index k in the frequency domain
  • the mapping rule satisfies:
  • p is the index of the DMRS port, is mapped to the DMRS modulation symbol corresponding to port p on RE with index (k, l) p
  • ⁇ is the symbol index of the starting OFDM symbol occupied by the DMRS modulation symbol or the symbol index of the reference OFDM symbol
  • w(k',l') is the mask sequence corresponding to the OFDM symbol with index l' and the subcarrier with index k' element.
  • ⁇ represents the subcarrier spacing parameter, is the power scaling factor.
  • the value of w(k', l') corresponding to DMRS port p can be determined according to Table 35.
  • N is twice the number of RBs included in the bandwidth occupied by the DMRS signal in the frequency domain
  • v may be a number that is relatively prime to N.
  • This application is aimed at the port expansion method of NR Type 2 DMRS.
  • 6 subcarriers are divided into 2 time-frequency resource subgroups by frequency division.
  • One subgroup contains 4 REs, and the other The subgroup contains the remaining 8 REs.
  • a mask sequence with a length of 4 is used to map 4 DMRS ports correspondingly.
  • 2 sets of mask sequences with a length of 8 are used to map 16 DMRS ports, or 3 sets of mask sequences with a length of 8 are used to map 24 DMRS ports.
  • any two sequences in each set of mask sequences with a length of 8 are orthogonal.
  • the embodiment of the present application provides a communication device through FIG. 16 , which can be used to perform the functions of the relevant steps in the above method embodiment.
  • the functions described above may be realized by hardware, or may be realized by software or hardware executes 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 FIG. 16 , including a communication unit 1101 and a processing unit 1102 .
  • the communication apparatus 1100 can be applied to network devices or terminal devices in the communication system shown in FIG. 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 1100 are introduced below.
  • the communication unit 1101 is configured to receive and send data.
  • the communication unit 1101 can be realized by a transceiver, for example, a mobile communication module.
  • the mobile communication module may include at least one antenna, at least one filter, a switch, a power amplifier, a low noise amplifier (low noise amplifier, LNA) and the like.
  • the AN device can communicate with the accessed terminal device through the mobile communication module.
  • the processing unit 1102 may be configured to support the communication device 1100 to execute the processing actions in the foregoing method embodiments.
  • the processing unit 1102 may be implemented by a processor.
  • the processor can be a central processing unit (central processing unit, CPU), and can also be other general processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC) , field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • a general-purpose processor can be a microprocessor, or any conventional processor.
  • the communication apparatus 1100 is applied to the sending device in the embodiment shown in FIG. 6 .
  • the specific functions of the processing unit 1102 in this embodiment will be introduced below.
  • the processing unit 1102 is configured to send indication information through the communication unit 1101; the indication information is used to indicate that a port belongs to a first port set or a second port set; the first port set corresponds to a first resource, and the second port set corresponds to a first resource.
  • the port set corresponds to the first resource and the second resource; the first resource and the second resource are located on the same time domain resource.
  • the first set of ports corresponds to a first reference signal
  • the second set of ports corresponds to a second reference signal
  • the number of first reference signal ports contained in the first set of ports is less than that contained in the second set of ports The number of second reference signal ports.
  • the processing unit 1102 is configured to: obtain a first sequence; elements in the first sequence correspond to resource elements RE in the first resource; and/or obtain a second sequence; The elements in the second sequence have a one-to-one correspondence with the REs in the first resource and the second resource; wherein, the number of elements contained in the first sequence is different from the number of elements contained in the second sequence .
  • the first sequence belongs to a first sequence set, and the sequences in the first sequence set have a one-to-one correspondence with at least one first reference signal;
  • the second sequence belongs to a second sequence set, and the second The sequences in the sequence set correspond one-to-one to at least one second reference signal;
  • any sequence in the first sequence set is orthogonal to any sequence in the first subset in the second sequence set, and is orthogonal to the second sequence set
  • the cross-correlation coefficient of any sequence other than the first subset in the two-sequence set is or
  • the cross-correlation coefficient between any sequence in the first sequence set and any sequence in the second sequence set is or
  • the number of elements included in the sequences in the first sequence set is 2, and the number of elements included in the sequences in the second sequence set is 4 or 6.
  • sequences in the first sequence set are orthogonal to each other; the sequences in the second sequence set are orthogonal to each other.
  • the first subset includes half of the sequences in the second sequence set.
  • each sequence in the second sequence set is a row vector of matrix b; or, when the second sequence When the number of elements included in the sequences in the set is 4, each sequence in the second sequence set includes 4 elements in a row vector in the matrix b.
  • the matrix b satisfies one of the following formulas:
  • the communication apparatus 1100 is applied to the receiving device in the embodiment of the present application shown in FIG. 6 .
  • the specific functions of the processing unit 1102 in this embodiment will be introduced below.
  • the processing unit 1102 is configured to receive indication information through the communication unit 1101; the indication information is used to indicate that a port belongs to a first port set or a second port set; the first port set corresponds to a first resource, and the second port set Corresponding to the first resource and the second resource; the first resource and the second resource are located on the same time domain resource.
  • the first set of ports corresponds to a first reference signal
  • the second set of ports corresponds to a second reference signal
  • the number of first reference signal ports contained in the first set of ports is less than that contained in the second set of ports The number of second reference signal ports.
  • the elements in the first sequence are in one-to-one correspondence with the REs in the first resource; the elements in the second sequence are in one-to-one correspondence with the REs in the first resource and the second resource; wherein, The number of elements contained in the first sequence is different from the number of elements contained in the second sequence.
  • the first sequence belongs to a first sequence set, and the sequences in the first sequence set have a one-to-one correspondence with at least one first reference signal;
  • the second sequence belongs to a second sequence set, and the second The sequences in the sequence set correspond one-to-one to at least one second reference signal;
  • any sequence in the first sequence set is orthogonal to any sequence in the first subset in the second sequence set, and is orthogonal to the second sequence set
  • the cross-correlation coefficient of any sequence other than the first subset in the two-sequence set is or
  • the cross-correlation coefficient between any sequence in the first sequence set and any sequence in the second sequence set is or
  • the number of elements included in the sequences in the first sequence set is 2, and the number of elements included in the sequences in the second sequence set is 4 or 6.
  • sequences in the first sequence set are orthogonal to each other; the sequences in the second sequence set are orthogonal to each other.
  • the first subset includes half of the sequences in the second sequence set.
  • each sequence in the second sequence set is a row vector of matrix b; or, when the second sequence When the number of elements included in the sequences in the set is 4, each sequence in the second sequence set includes 4 elements in a row vector in the matrix b.
  • the matrix b satisfies one of the following formulas:
  • each function in each embodiment of the present application Units can be integrated into one processing unit, or physically exist separately, or two or more units can be integrated into one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
  • the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or part of the contribution to the prior art 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 make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .
  • the embodiment of the present application provides a communication device as shown in FIG. 17 , which can be used to execute the relevant steps in the above method embodiments.
  • the communication device can be applied to network devices or terminal devices in the communication system shown in FIG. 1 , can implement the communication methods provided in the above embodiments and examples of the present application, and has the functions of the communication device shown in FIG. 16 .
  • the communication device 1200 includes: a communication module 1201 , a processor 1202 and a memory 1203 . Wherein, the communication module 1201, the processor 1202 and the memory 1203 are connected to each other.
  • the communication module 1201 , the processor 1202 and the memory 1203 are connected to each other through a bus 1204 .
  • the bus 1204 may be a peripheral component interconnect standard (peripheral component interconnect, PCI) bus or an extended industry standard architecture (extended industry standard architecture, EISA) bus or the like.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 17 , but it does not mean that there is only one bus or one type of bus.
  • the communication module 1201 is used to receive and send data to realize communication interaction with other devices.
  • the communication module 1201 may be implemented through a physical interface, a communication module, a communication interface, or an input/output interface.
  • the processor 1202 may be configured to support the communication device 1200 to execute the processing actions in the foregoing method embodiments. When the communication device 1200 is used to implement the foregoing method embodiments, the processor 1202 may also be configured to implement the functions of the foregoing processing unit 1102 .
  • the processor 1202 may be a CPU, or other general-purpose processors, DSP, ASIC, FPGA or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • 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. 6 .
  • the processor 1202 is specifically used for:
  • the indication information is used to indicate that the port belongs to the first port set or the second port set;
  • the first port set corresponds to a first resource
  • the second port set corresponds to the first resource and the second resource; the first resource and the second resource are located on the same time domain resource.
  • the communication device 1200 is applied to the receiving device in the embodiment of the present application shown in FIG. 6 .
  • the processor 1202 is specifically used for:
  • the indication information is used to indicate that the port belongs to the first port set or the second port set;
  • the first port set corresponds to a first resource
  • the second port set corresponds to the first resource and the second resource; the first resource and the second resource are located on the same time domain resource.
  • processor 1202 For the specific functions of the processor 1202, refer to the above descriptions in the communication methods provided in the embodiments of the present application and examples, as well as the specific functional descriptions of the communication device 1100 in the embodiments of the present application shown in FIG. 16 , which are not repeated here. repeat.
  • the memory 1203 is used to store program instructions and data.
  • the program instructions may include program codes including computer operation instructions.
  • the memory 1203 may include a RAM, and may also include a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory.
  • the processor 1202 executes the program instructions stored in the memory 1203, and uses the data stored in the memory 1203 to implement the above functions, thereby realizing the communication method provided by the above embodiments of the present application.
  • the memory 1203 in FIG. 17 of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories.
  • the non-volatile memory can be ROM, programmable read-only memory (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 external cache memory.
  • RAM Static Random Access Memory
  • SRAM Static Random Access Memory
  • DRAM Dynamic Random Access Memory
  • Synchronous Dynamic Random Access Memory Synchronous Dynamic Random Access Memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM, DDR SDRAM enhanced synchronous dynamic random access memory
  • Enhanced SDRAM, ESDRAM synchronous connection dynamic random access memory
  • Synchlink DRAM, SLDRAM Direct Memory Bus Random Access Memory
  • Direct Rambus RAM Direct Rambus RAM
  • an embodiment of the present application further provides a computer program that, when the computer program is run on a computer, causes the computer to execute the method provided in the above embodiments.
  • the embodiments of the present application also provide a computer-readable storage medium, in which a computer program is stored, and when the computer program is executed by a computer, the computer executes the method provided in the above embodiments .
  • the storage medium may be any available medium that can be accessed by a computer.
  • 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 may be used to carry or store information in the form of instructions or data structures desired program code and any other medium that can be accessed by a computer.
  • an embodiment of the present application further provides a chip, the chip is used to read a computer program stored in a memory, and implement the method provided in the above embodiments.
  • an embodiment of the present application provides a chip system, where the chip system includes a processor, configured to support a computer device to implement functions involved in each device in the above embodiments.
  • the chip system further includes a memory, and the memory is used to store necessary programs and data of the computer device.
  • the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
  • the embodiments of the present application provide a communication method, device, and device.
  • the method is as follows: the sending device may send indication information, where the indication information is used to indicate that a port belongs to the first port set or the second port set.
  • the first port set corresponds to the first resource
  • the second port set corresponds to the first resource and the second resource
  • the first resource and the second resource are located on the same time domain resource.
  • the sending device needs to send the first reference signal corresponding to the first port set, it can send the first reference signal through the first resource; when the sending device needs to send the second reference signal corresponding to the second port set, it can use the first resource and the second resource to send the second reference signal.
  • more reference signal ports can be supported on limited resources, and thus more transmission streams can be supported.
  • the 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 combining 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 capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions
  • the device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

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Abstract

Sont divulgués dans la présente invention un procédé et un appareil de communication, et un dispositif. Le procédé comprend les étapes suivantes : un dispositif d'envoi peut envoyer des informations d'indication, les informations d'indication étant utilisées pour indiquer qu'un port appartient à un premier ensemble de ports ou à un second ensemble de ports, le premier ensemble de ports correspondant à une première ressource, le second ensemble de ports correspondant à la première ressource et à une seconde ressource, et la première ressource et la seconde ressource étant situées sur une même ressource de domaine temporel ; si le dispositif d'envoi doit envoyer un premier signal de référence correspondant au premier ensemble de ports, le dispositif d'envoi peut envoyer le premier signal de référence au moyen de la première ressource ; et si le dispositif d'envoi doit envoyer un second signal de référence correspondant au second ensemble de ports, le dispositif d'envoi peut envoyer le second signal de référence au moyen de la première ressource et de la seconde ressource. Au moyen du procédé, davantage de ports de signal de référence peuvent être pris en charge sur des ressources limitées, ce qui permet de prendre en charge un plus grand nombre de flux de transmission.
PCT/CN2022/142942 2021-12-31 2022-12-28 Appareil et procédé de communication, et dispositif WO2023125697A1 (fr)

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Citations (3)

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