WO2023207712A1 - 发送解调参考信号的方法及装置 - Google Patents

发送解调参考信号的方法及装置 Download PDF

Info

Publication number
WO2023207712A1
WO2023207712A1 PCT/CN2023/089248 CN2023089248W WO2023207712A1 WO 2023207712 A1 WO2023207712 A1 WO 2023207712A1 CN 2023089248 W CN2023089248 W CN 2023089248W WO 2023207712 A1 WO2023207712 A1 WO 2023207712A1
Authority
WO
WIPO (PCT)
Prior art keywords
dmrs
cdm group
dmrs port
expanded
cdm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/089248
Other languages
English (en)
French (fr)
Inventor
徐军
高君慧
金黄平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP23795145.4A priority Critical patent/EP4507356A4/en
Publication of WO2023207712A1 publication Critical patent/WO2023207712A1/zh
Priority to US18/928,807 priority patent/US20250096976A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0016—Time-frequency-code
    • 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
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/10—Dynamic resource partitioning

Definitions

  • the present application relates to the field of wireless communication technology, and in particular, to a method and device for transmitting a demodulation reference signal.
  • the fifth generation (the fifth generation, 5G) mobile communication system has emerged.
  • the 5G mobile communication system has emerged. It is called new radio access technology (NR) system.
  • NR new radio access technology
  • the network device sends downlink data to the terminal device accompanied by a demodulation reference signal (DMRS or DM-RS); or, the terminal device sends uplink data to the network device accompanied by DMRS.
  • DMRS uses the same precoding matrix as the data.
  • Each layer of data that has been layer mapped needs to be allocated a DMRS port to transmit DMRS, and DMRS is used to estimate the equivalent channel of the layer data.
  • multi-layer data can be sent based on multiple-in multiple-out (MIMO) technology, and multiple DMRS ports corresponding to multi-layer data are orthogonal to each other.
  • MIMO multiple-in multiple-out
  • This application provides a method and device for transmitting a demodulation reference signal, thereby increasing the number of layers of the transmitted data stream, thereby increasing the capacity of the NR system.
  • the first aspect provides a method for transmitting a demodulation reference signal.
  • the method can be applied to a terminal device, or the method can be applied to a communication device that can support the terminal device to implement the method.
  • the communication device includes a chip system.
  • the method includes: the terminal device receives indication information, the indication information is used to indicate the expansion mode of the DMRS port of at least one CDM group in multiple Code Division Multiplexing (Code Division Multiplexing, CDM) groups corresponding to a DMRS configuration type; by passing The DMRS port of at least one expanded CDM group sends DMRS, and the DMRS port of the at least one CDM group includes a legacy DMRS port and an expanded DMRS port.
  • DMRS is used to demodulate uplink data.
  • the terminal device flexibly expands the CDM group corresponding to the DMRS configuration type according to the instruction information, and sends DMRS through the DMRS port of the expanded CDM group. This ensures DMRS port orthogonality in different scenarios and sends more layers. data, thereby increasing the capacity of the NR system.
  • the second aspect provides a method for receiving a demodulation reference signal.
  • the method can be applied to network equipment, or the method can be applied to a communication device that can support network equipment to implement the method.
  • the communication device includes a chip. system.
  • the method includes: a network device sending indication information, the indication information being used to indicate an expansion mode of a DMRS port of at least one CDM group among multiple CDM groups corresponding to a DMRS configuration type; receiving it through the expanded DMRS port of at least one CDM group.
  • DMRS the DMRS ports of at least one CDM group include traditional DMRS ports and extended DMRS ports, and DMRS is used to demodulate uplink data.
  • the network device instructs the terminal device to flexibly expand the CDM group corresponding to the DMRS configuration type according to the instruction information, so that the network device receives DMRS through the DMRS port of the expanded CDM group, thereby ensuring DMRS port orthogonality in different scenarios. Receive more layers of data, thereby increasing the capacity of the NR system.
  • the third aspect provides a method for receiving a demodulation reference signal.
  • the method can be applied to a terminal device, or the method can be applied to a communication device that can support the terminal device to implement the method.
  • the communication device includes a chip system.
  • the method includes: a terminal device receiving indication information, the indication information being used to indicate an expansion mode of a DMRS port of at least one CDM group among multiple CDM groups corresponding to a DMRS configuration type; receiving through the expanded DMRS port of at least one CDM group DMRS, the DMRS ports of at least one CDM group include traditional DMRS ports and extended DMRS ports, and DMRS is used to demodulate downlink data.
  • the terminal device flexibly expands the CDM group corresponding to the DMRS configuration type according to the instruction information, and receives DMRS through the DMRS port of the expanded CDM group, thereby ensuring orthogonality of the DMRS ports in different scenarios and receiving more layers. data, thereby increasing the capacity of the NR system.
  • the fourth aspect provides a method for sending a demodulation reference signal.
  • the method can be applied to network equipment, or the method can be applied to a communication device that can support network equipment to implement the method.
  • the communication device includes a chip system.
  • the method includes: the network device sends indication information, the indication information is used to indicate the expansion mode of the DMRS port of at least one CDM group among multiple code division multiplexing CDM groups corresponding to a DMRS configuration type; through the expanded at least one CDM group
  • the DMRS port sends DMRS, and the DMRS port of at least one CDM group includes a traditional DMRS port and an extended DMRS port.
  • DMRS is used to demodulate downlink data.
  • the network device flexibly expands the CDM group corresponding to the DMRS configuration type according to the instruction information, so that the network device sends DMRS through the DMRS port of the expanded CDM group, thereby ensuring orthogonality of the DMRS ports in different scenarios and sending more layers of data, thereby increasing the capacity of the NR system.
  • the expansion mode of the DMRS port of the CDM group is determined based on the delay spread of the channel of the terminal device to be scheduled.
  • the expansion mode is used to indicate DMRS port expansion for all CDM groups corresponding to the DMRS configuration type.
  • the channels include uplink channels and downlink channels; or, in When the delay expansion of channels of some of the terminal devices to be scheduled is greater than or equal to the first threshold, the expansion mode is used to instruct some of the multiple CDM groups corresponding to the DMRS configuration type to perform DMRS port expansion.
  • the configuration type of DMRS includes a first configuration type.
  • the DMRS ports of each of the two CDM groups corresponding to the first configuration type are expanded by 2 times.
  • the delay spread of channels of some terminal devices among the terminal devices to be scheduled is greater than or equal to the first threshold
  • the DMRS of the first CDM group The port is expanded 3 times, and the DMRS port of the second CDM group is not expanded.
  • the configuration type of DMRS also includes a second configuration type.
  • the DMRS ports of each CDM group in the three CDMs corresponding to the second configuration type are expanded by 2 times.
  • the delay spread of the channels of the first part of the terminal devices is greater than or equal to the first threshold and less than the second threshold, and the delay spread of the channels of the second part of the terminal devices is greater than or equal to the third threshold.
  • the DMRS port of the third CDM group is expanded by 3 times, the DMRS port of the fourth CDM group is expanded by 2 times, and the DMRS port of the fifth CDM group is expanded by 2 times.
  • the DMRS port of the CDM group is not expanded; the first threshold is smaller than the second threshold.
  • the second configuration type In the corresponding third CDM group, fourth CDM group and fifth CDM group, the DMRS port of the third CDM group is expanded by 4 times, the DMRS ports of the fourth CDM group and the fifth CDM group are not expanded, and the first threshold is smaller than the first threshold. Two thresholds.
  • the DMRS ports in the CDM group without DMRS port expansion are far apart in the delay domain, even if the DMRS port is allocated to a terminal device with a large channel delay expansion, the orthogonality of the DMRS ports can be guaranteed to a certain extent.
  • the DMRS ports in the CDM group for DMRS port expansion are closely spaced in the delay domain, and they need to be allocated to terminal equipment with small channel delay expansion to ensure the orthogonality of the DMRS ports to a certain extent. Therefore, the DMRS ports in the CDM group without DMRS port expansion are preferentially allocated to terminal equipment with large delay expansion, and the DMRS ports in the CDM group after DMRS port expansion are allocated to terminal equipment with small delay expansion.
  • the indication information is used to indicate the coefficient The value of M and the value of m; or, the indication information is used to indicate the coefficient The value of m/M in; or, the indication information is used to indicate the coefficient value.
  • the indication information is predefined; or, the indication information is configured through control signaling, which includes radio resource control (RRC) signaling and media access control.
  • RRC radio resource control
  • media access control At least one of Media Access Control Element (MAC-CE) and downlink control information (DCI).
  • MAC-CE Media Access Control Element
  • DCI downlink control information
  • a communication device in a fifth aspect, is provided.
  • the beneficial effects can be found in the description of the first aspect and will not be described again here.
  • the communication device has the function of implementing the behavior in the method embodiment of the first aspect.
  • the functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication device includes: a transceiver unit and a processing unit.
  • the transceiver unit is configured to receive indication information and send DMRS through the expanded DMRS port of at least one CDM group.
  • the indication information is used to indicate an expansion mode of a DMRS port of at least one CDM group among multiple CDM groups corresponding to a DMRS configuration type.
  • the DMRS ports of at least one CDM group include traditional DMRS ports and extended DMRS ports.
  • the processing unit is configured to determine an expansion mode of a DMRS port of at least one CDM group among multiple CDM groups corresponding to a DMRS configuration type according to the indication information.
  • a sixth aspect provides a communication device.
  • the beneficial effects can be found in the description of the second aspect and will not be described again here.
  • the communication device has the function of implementing the behavior in the method embodiment of the second aspect.
  • the functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more A module corresponding to the above functions.
  • the communication device includes: a transceiver unit and a processing unit.
  • the transceiver unit is configured to send indication information and receive DMRS through the expanded DMRS port of at least one CDM group.
  • the indication information is used to indicate an expansion mode of the DMRS port of at least one CDM group among multiple CDM groups corresponding to a DMRS configuration type.
  • the DMRS ports of at least one CDM group include traditional DMRS ports and extended DMRS ports.
  • DMRS is used to demodulate uplink data.
  • the processing unit is configured to determine the expansion mode of the DMRS port of at least one CDM group in the CDM group corresponding to the DMRS configuration type.
  • a seventh aspect provides a communication device.
  • the beneficial effects can be found in the description of the third aspect and will not be described again here.
  • the communication device has the function of implementing the behavior in the method embodiment of the third aspect.
  • the functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication device includes: a transceiver unit and a processing unit.
  • the transceiver unit is configured to receive indication information and receive DMRS through an expanded DMRS port of at least one CDM group.
  • the indication information is used to indicate an expansion mode of the DMRS port of at least one CDM group among multiple CDM groups corresponding to a DMRS configuration type.
  • the DMRS ports of at least one CDM group include traditional DMRS ports and extended DMRS ports.
  • DMRS is used to demodulate downlink data.
  • the processing unit is configured to expand the DMRS port of at least one CDM group in the CDM group corresponding to the configuration type of the indication information DMRS.
  • a communication device is provided.
  • the beneficial effects can be found in the description of the fourth aspect and will not be described again here.
  • the communication device has the function of implementing the behavior in the method embodiment of the fourth aspect.
  • the functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication device includes: a transceiver unit and a processing unit.
  • the transceiver unit is configured to send indication information and send DMRS through the expanded DMRS port of at least one CDM group.
  • the indication information is used to indicate an expansion mode of the DMRS port of at least one CDM group among multiple CDM groups corresponding to a DMRS configuration type.
  • the DMRS ports of at least one CDM group include traditional DMRS ports and extended DMRS ports.
  • the processing unit is configured to determine the expansion mode of the DMRS port of at least one CDM group in the CDM group corresponding to the DMRS configuration type.
  • a communication device may be the terminal device in the above method embodiment, or a chip provided in the terminal device.
  • the communication device includes a communication interface and a processor, and optionally, a memory.
  • the memory is used to store computer programs or instructions, and the processor is coupled to the memory and the communication interface.
  • the processor executes the computer program or instructions, the communication device causes the communication device to perform the method performed by the terminal device in the above method embodiment.
  • a communication device may be the network device in the above method embodiment, or a chip provided in the network device.
  • the communication device includes a communication interface and a processor, and optionally, a memory.
  • the memory is used to store computer programs or instructions, and the processor is coupled to the memory and the communication interface.
  • the processor executes the computer program or instructions, the communication device causes the communication device to perform the method performed by the network device in the above method embodiment.
  • a computer program product includes: computer program code.
  • the computer program product includes: computer program code.
  • a computer program product includes: computer program code.
  • the computer program product includes: computer program code.
  • a chip system in a thirteenth aspect, includes a processor and is used to implement the functions of the terminal device in the methods of the above aspects.
  • the chip system further includes a memory for storing program instructions and/or data.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • a fourteenth aspect provides a chip system.
  • the chip system includes a processor and is used to implement the functions of the network device in the methods of the above aspects.
  • the chip system further includes a memory for storing program instructions and/or data.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • a computer-readable storage medium stores a computer program. When the computer program is run, the methods executed by the terminal device in the above aspects are implemented.
  • a computer-readable storage medium stores a computer program.
  • the methods executed by the network device in the above aspects are implemented.
  • a communication system in a seventeenth aspect, includes the terminal equipment described in the fifth aspect or a communication device that supports the terminal equipment to implement the method described in the first aspect, and the network equipment or support described in the sixth aspect.
  • the communication system includes the terminal device described in the seventh aspect or the communication device that supports the terminal device to implement the method described in the third aspect, and the network device described in the eighth aspect or the network device that supports the network device to implement the method described in the fourth aspect. communication devices;
  • the communication system includes the terminal equipment described in the ninth aspect or a communication device that supports the terminal equipment to implement the method described in the first or third aspect, and the network equipment described in the tenth aspect or supports the network equipment to implement the second aspect Or the communication device of the method described in the fourth aspect.
  • Figure 1 is a schematic diagram of a code word processing process provided by an embodiment of the present application.
  • Figure 2 is a schematic diagram of a DMRS mapping type provided by an embodiment of the present application.
  • Figure 3 is a schematic diagram of a DMRS configuration type provided by an embodiment of the present application.
  • Figure 4 is a schematic architectural diagram of a mobile communication system provided by an embodiment of the present application.
  • Figure 5 is a flow chart of a method for transmitting and receiving demodulation reference signals provided by an embodiment of the present application
  • Figure 6 is a schematic diagram of an expansion scheme of a type 1 DMRS port provided by an embodiment of the present application.
  • Figure 7 is a schematic diagram of another type 1 DMRS port expansion scheme provided by the embodiment of the present application.
  • Figure 8 is a schematic diagram of an expansion scheme of a type 2 DMRS port provided by an embodiment of the present application.
  • Figure 9 is a schematic diagram of another type 2 DMRS port expansion scheme provided by the embodiment of the present application.
  • Figure 10 is a schematic diagram of another type 2 DMRS port expansion scheme provided by the embodiment of the present application.
  • Figure 11 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Figure 12 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • the process of network equipment sending data to terminal equipment can be called downlink transmission.
  • the process of the terminal device sending data to the network device can be called uplink transmission.
  • network equipment or terminal equipment performs check code addition, code block segmentation, channel coding, rate matching, and coding on the original bits in the transport block (TB) before transmitting data.
  • Block cascading, scrambling, modulation, layer mapping and multi-antenna precoding generate baseband signals and map them to antennas for transmission.
  • Layer mapping refers to the code word obtained by concatenating code blocks after rate matching.
  • the modulation symbols for scrambling modulation are mapped to multiple layers to obtain a new code stream.
  • up to two codewords can be processed in parallel, that is, two processes from transmission blocks to codewords can be processed in parallel.
  • the layer mapping process includes layer mapping of 1 codeword and layer mapping of 2 codewords.
  • 1 codeword refers to a single codeword stream.
  • 2 codewords refers to a dual codeword stream.
  • Single-code word streams can be mapped to up to 4 layers, and dual-code word streams can be mapped to up to 8 layers.
  • Multi-antenna precoding refers to mapping the code stream of N layers to N antenna ports based on the precoding matrix, that is, multiplying the output vector of each layer by a precoding matrix to obtain the precoding matrix.
  • the result of encoding corresponds to the number of antenna ports.
  • the number of layers can also be alternatively described as "number of transport layers".
  • FIG. 1 shows a schematic diagram of a codeword processing process provided by an embodiment of the present application.
  • resource unit Resource Element, RE
  • Physical antenna physical antenna
  • the number of antenna ports is the actual number of "paths", and the number of antenna ports is less than or equal to the number of physical antennas.
  • the antenna port does not have a one-to-one correspondence with the physical antenna. It may be one-to-many or many-to-one.
  • the receiver uses the Demodulation Reference Signal (DMRS) to estimate the uplink and downlink equivalent channels and then demodulate the data.
  • DMRS Demodulation Reference Signal
  • Each layer of data after layer mapping needs to be allocated a DMRS port, and DMRS is sent based on the multi-antenna precoded DMRS port, so that after the receiver receives the DMRS, it can estimate the equivalent channel of the layer data and demodulate the data. Therefore, DMRS is sent together with data, and the same precoding matrix as the data is used to perform multi-antenna precoding on DMRS. There is a one-to-one correspondence between DMRS, layer number and DMRS port.
  • the network device can instruct the terminal device to receive the time-frequency resources of DMRS so that the terminal device can
  • the DMRS is received on the indicated DMRS time-frequency resource, the DMRS is used to estimate the downlink equivalent channel, and the downlink data sent by the received network device is demodulated.
  • the network device can instruct the terminal device to send the DMRS time-frequency resource, and the terminal device sends DMRS on the DMRS time-frequency resource indicated by the network device, so that the network device can receive DMRS on the indicated DMRS time-frequency resource, and utilize DMRS for uplink, etc.
  • the effective channel is estimated and the uplink data sent by the received terminal device is demodulated.
  • DMRS includes two different time domain mapping types: mapping type A (Type A) and mapping category B (Type B).
  • mapping type A mapping type A
  • mapping category B mapping category B
  • the main difference between these two time domain types is the position of the first symbol carrying DMRS in the resource block (RB), that is, the time domain starting position of DMRS in the RB is different.
  • mapping type A the first symbol carrying DMRS in the RB is located in symbol #2 or symbol #3 in the time slot.
  • This mapping method does not care about the starting position of the actual data transmission, but fixes the DMRS at the relative edge of the time slot. For example, it is located after the physical downlink control channel (PDCCH).
  • PDCCH physical downlink control channel
  • FIG. 2 is a schematic diagram of DMRS mapping type A provided by the embodiment of the present application.
  • the smallest unit in the frequency domain is a subcarrier, and the bandwidth can be 15KHz.
  • the smallest unit in the time domain is a slot, and a slot can be 1 millisecond (millisecond, ms).
  • Each small square in the time-frequency resource grid represents an RE.
  • the bandwidth of an RE in the frequency domain is 15KHz and the length of one OFDM symbol in the time domain.
  • 12 consecutive subcarriers in the frequency domain and 1 slot in the time domain form an RB.
  • NCP normal cyclic prefix
  • one slot includes 14 OFDM symbols.
  • the first symbol carrying DMRS in the RB is located at symbol #2 in the timeslot.
  • DMRS can be located in the front symbol of the resource block (RB), that is, the prefix DMRS, which helps the system obtain lower processing delay. In this way, the receiver can perform channel estimation as early as possible. Regardless of whether the transmission is completed or not, the receiver can perform relevant demodulation on the buffered received data without having to receive and buffer all the data before processing.
  • RB resource block
  • mapping type indicated by the network device is mapping type A
  • the time domain starting position of DMRS is relative to the starting position of the time slot
  • mapping type B For the DMRS time domain structure of mapping type B, the first symbol carrying DMRS in the RB is fixed in the first symbol mapped to the data transmission resource (such as PDSCH). At this time, the time domain starting position of DMRS is not relative to the starting position of the time slot symbol #0, but relative to the starting position of the data transmission resource. Mapping type B is mainly used in scenarios where data transmission only occupies a small part of the symbols of a time slot to reduce transmission delay.
  • (b) in Figure 2 is a schematic diagram of DMRS mapping type B provided by the embodiment of the present application.
  • the first symbol carrying DMRS in the RB is located at symbol #8 in the timeslot.
  • DMRS includes two different configuration types: configuration type 1 (type 1) and configuration type 2 (type 2).
  • FIG. 3 is a schematic diagram of DMRS Type 1 provided by the embodiment of the present application.
  • the frequency domain resources of DMRS are distributed at one RE interval in the frequency domain of one symbol, with a density of 50%.
  • 3GPP TS 38.211 V16.7.0 stipulates that REs on even-numbered subcarriers can provide 2 orthogonal DMRS ports. REs on odd-numbered subcarriers can also provide 2 orthogonal DMRS ports. Multiple DMRS ports using the same subcarrier belong to the same Code Division Multiplexing (CDM) group.
  • type 1 corresponds to two CDM groups, such as CDM group 0 and CDM group 1.
  • each CDM group can provide 2 orthogonal DMRS ports; when using dual symbols, each CDM group can provide 4 orthogonal DMRS ports. Since the DMRS sequences corresponding to the DMRS ports of different CDM groups occupy different frequency domain resources, they are orthogonal to each other. DMRS sequences corresponding to different DMRS ports in the same CDM group occupy the same time-frequency resources, and orthogonal cover code (OCC) is used to make the DMRS sequences corresponding to these ports orthogonal to each other.
  • OCC orthogonal cover code
  • FIG. 3 is a schematic diagram of DMRS Type 2 provided by the embodiment of the present application.
  • the frequency domain resources of DMRS are connected together every two REs in the frequency domain of one symbol, separated by 4 REs from each other, and the density is 33.3%.
  • type 2 corresponds to three CDM groups, such as CDM group 0, CDM group 1 and CDM group 2.
  • the DMRS sequences corresponding to different DMRS ports in each CDM group are also orthogonal through OCC codes.
  • Each DMRS port in type 1 occupies a higher frequency domain resource density and has better channel estimation performance.
  • Type 2 supports more orthogonal DMRS ports and can support the transmission of more layers of data.
  • Each DMRS port is identified by a port number.
  • the time-frequency resource position occupied by the DMRS sequence is determined by the port number and configuration type (type 1 or type 2).
  • the configuration type is indicated to the terminal device through the high-level signaling radio resource control (RRC) parameters, and the port number is indicated to the terminal device through the antenna ports (antenna ports) field in the downlink control information (DCI).
  • RRC radio resource control
  • the embodiment of the present application provides a method for sending DMRS.
  • the network device first flexibly determines the expansion mode of the DMRS port based on the channel information of all currently scheduled terminal devices; then configures the expansion mode of the DMRS port for each terminal device, as well as instructions.
  • the DMRS sequence is generated in such a way that the terminal device receives DMRS or sends DMRS through the DMRS port of the extended CDM group.
  • This method flexibly selects the expansion mode of the DMRS ports of each CDM group to ensure orthogonal expansion of the DMRS ports in different scenarios, thereby achieving robust channel estimation and data demodulation.
  • the channel information in this method can be delay spread or other channel information, which is not subject to application and is not limited. For ease of description, the following takes channel delay spread as an example.
  • FIG. 4 is a schematic architectural diagram of a mobile communication system applied in an embodiment of the present application.
  • the mobile communication system 400 includes a core network device 410 , a network device 420 , a network device 430 , a terminal device 440 and a terminal device 450 .
  • Terminal equipment is connected to network equipment through wireless means, and network equipment is connected to core network equipment through wireless or wired means.
  • Core network equipment and network equipment can be independent and different physical devices, or the functions of the core network equipment and the logical functions of the network equipment can be integrated on the same physical device, or part of the core network can be integrated into one physical device. Device functionality and functionality of some network devices.
  • the terminal device can It is fixed position or can be movable.
  • FIG. 4 is only a schematic diagram.
  • the communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in FIG. 4 .
  • the embodiments of the present application do not limit the number of core network equipment, network equipment, and terminal equipment
  • Network equipment is the access equipment that terminal equipment wirelessly accesses into the mobile communication system. It can be a base station (base station), an evolved base station (evolved NodeB, eNodeB), a transmission reception point (transmission reception point, TRP), The next generation base station (next generation NodeB, gNB) in the 5G mobile communication system, the base station in the future mobile communication system or the access node in the WiFi system, etc.; it can also be a module or unit that completes some functions of the base station, for example, it can be Centralized unit (CU) or distributed unit (DU). The embodiments of this application do not limit the specific technology and specific equipment form used by the network equipment. Network equipment can also be called wireless access network equipment. Unless otherwise specified, network equipment refers to wireless access network equipment. For example, the network device 420 may be called a wireless access network device 420. Network device 430 may be referred to as radio access network device 430.
  • Terminal equipment can also be called terminal, user equipment (UE), mobile station, mobile terminal, etc.
  • Terminal devices can be mobile phones, tablets (Pads), computers with wireless transceiver functions, virtual reality terminal devices, augmented reality terminal devices, wireless terminals in industrial control, wireless terminals in unmanned driving, and wireless terminals in remote surgery. , wireless terminals in smart grids, wireless terminals in transportation security, wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • the embodiments of this application do not limit the specific technology and specific equipment form used by the terminal equipment.
  • Multiple terminal devices included in the mobile communication system 400 can send uplink data to a network device, and the uplink data sent by the terminal device can be received by one of the network devices, or can be jointly received by two network devices.
  • Network devices can also send downlink data to multiple terminal devices.
  • Embodiments of this application can include a variety of communication systems including 5G new radio (NR) systems.
  • NR 5G new radio
  • Network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and satellites in the sky.
  • the embodiments of this application do not limit the application scenarios of network devices and terminal devices.
  • Network equipment and terminal equipment can communicate through licensed spectrum (licensed spectrum), unlicensed spectrum (unlicensed spectrum), or both licensed spectrum and unlicensed spectrum.
  • Network equipment and terminal equipment can communicate through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or both spectrum below 6 GHz and spectrum above 6 GHz can be used for communication at the same time.
  • GHz gigahertz
  • the embodiments of the present application do not limit the spectrum resources used between the network device and the terminal device.
  • the time domain symbols may be orthogonal frequency division multiplexing (OFDM symbols) or single carrier frequency division multiplexing (SC-FDM). )symbol. Unless otherwise specified, the symbols in the embodiments of this application all refer to time domain symbols.
  • the physical uplink shared channel (PUSCH) and PDSCH are only examples of uplink and downlink data channels.
  • data channels may have different names, and the embodiments of this application do not limit this.
  • FIG. 5 is a flow chart of a method for transmitting and receiving a demodulation reference signal provided by an embodiment of the present application.
  • the terminal device 440 sends uplink data to the network device 430 as an example to describe the process of sending the demodulation reference signal.
  • the method may include the following steps.
  • Step 510 The network device 420 sends the instruction information to the terminal device 440.
  • the network device 420 may determine the expansion mode of the DMRS port based on the delay expansion of the uplink channels (eg, PUSCH) of all currently scheduled terminal devices (eg, the terminal device 440).
  • the DMRS port expansion multiples of the two CDM groups are the same. It can be understood that this expansion method is used to indicate uniform expansion of DMRS ports for two CDM groups. For example, the DMRS ports of both CDM groups are expanded by 2 times.
  • the two CDM groups adopt different DMRS port expansion multiples. It can be understood that this expansion mode is used to indicate non-uniform expansion of DMRS ports for two CDM groups. For example, the DMRS port of the first CDM group is expanded by 3 times, and the DMRS port of the second CDM group is expanded by 1 time, that is, it is not expanded.
  • the DMRS port expansion multiples of the three CDM groups are the same. It can be understood that this expansion method is used to indicate uniform expansion of DMRS ports for three CDM groups. For example, the DMRS ports of the three CDM groups are expanded by 2 times.
  • the three CDM groups adopt different DMRS port expansion multiples.
  • the first threshold is smaller than the second threshold, and this expansion mode is used to indicate non-uniform expansion of DMRS ports for three CDM groups.
  • the DMRS port of the third CDM group is expanded by 3 times
  • the DMRS port of the fourth CDM group is expanded by 2 times
  • the DMRS port of the fifth CDM group is expanded by 1 time, that is, it is not expanded.
  • all terminal devices currently scheduled include terminal device 1, terminal device 2 and terminal device 3.
  • the delay spread of the uplink channel of terminal equipment 1 is greater than or equal to the first threshold and less than the second threshold, the delay spread of the uplink channel of terminal equipment 2 is greater than or equal to the second threshold, and the delay spread of the uplink channel of terminal equipment 3 is greater than or equal to the second threshold.
  • the three CDM groups include CDM Group 0, CDM Group 1 and CDM Group 2.
  • the DMRS port of CDM group 0 is expanded by 3 times
  • the DMRS port of CDM group 1 is expanded by 2 times
  • the DMRS port of CDM group 2 is expanded by 1 time.
  • the three CDM groups adopt different DMRS port expansion multiples. It can be understood that the first threshold is smaller than the second threshold, and this expansion mode is used to indicate non-uniform expansion of DMRS ports for three CDM groups.
  • the third CDM group uses 4 times DMRS port expansion
  • the fourth CDM group and the fifth CDM group both use 1 times DMRS port expansion, that is, there is no expansion.
  • all terminal devices currently scheduled include terminal device 1, terminal Terminal device 2 and terminal device 3.
  • the delay spread of the uplink channel of terminal device 1 is greater than or equal to the second threshold, the delay spread of the uplink channel of terminal device 2 is less than the first threshold, and the delay spread of the uplink channel of terminal device 3 is less than the first threshold.
  • the three CDM groups include CDM Group 0, CDM Group 1 and CDM Group 2.
  • the DMRS port of CDM group 0 is expanded by 4 times, the DMRS port of CDM group 1 is expanded by 1 time, and the DMRS port of CDM group 2 is expanded by 1 time.
  • expanding the DMRS ports of the CDM group can be understood as expanding the number of DMRS ports of the CDM group.
  • the network equipment can preferentially allocate the DMRS ports in the CDM group without DMRS port expansion to terminal equipment with large delay expansion, and allocate the DMRS ports in the CDM group with DMRS port expansion to terminals with small delay expansion. equipment.
  • the DMRS ports of CDM group 0 include traditional DMRS ports and extended DMRS ports
  • the DMRS ports of CDM group 1 include traditional DMRS ports but do not include extended DMRS ports.
  • Terminal equipment 0 with small channel delay expansion preferentially uses the DMRS port of CDM group 0
  • terminal equipment 1 with large channel delay expansion preferentially uses the DMRS port of CDM group 1.
  • the network equipment allocates DMRS ports in CDM groups with different expansion multiples for terminal devices with different delay expansions, which can not only ensure that the delay expansion of all terminal devices currently scheduled is smaller, but also ensure the orthogonality of the DMRS ports after the expansion. It can ensure the orthogonality of DMRS ports after expansion when the delay expansion of some terminal equipment is large.
  • the indication information is used to indicate the expansion mode of the DMRS port of at least one CDM group in the CDM group corresponding to a DMRS configuration type.
  • the indication information may include first information or second information.
  • the first information is used to instruct the DMRS ports of all CDM groups corresponding to the DMRS configuration type to be expanded.
  • the second information is used to indicate that the DMRS ports of some CDM groups in the CDM group corresponding to the DMRS configuration type are to be expanded.
  • the first information includes that DMRS port expansion multiples of all CDM groups corresponding to the DMRS configuration type are the same.
  • the second information includes DMRS port expansion multiples of some CDM groups in all CDM groups corresponding to the DMRS configuration type.
  • the second information may indicate different expansion multiples, and different expansion multiples may indicate different expansion modes.
  • the network device 420 configures indication information for the terminal device through control signaling, indicating the expansion mode of the DMRS port of at least one CDM group in the CDM group corresponding to the DMRS configuration type.
  • the network device 420 can send downlink control information (DCI) to different terminal devices to configure the expansion mode of the DMRS port of the CDM group for the terminal device.
  • the DCI may include indication information instructing the terminal device to receive the DMRS port of the DMRS sequence.
  • type 1 includes two DMRS port expansion modes, namely uniform expansion mode and non-uniform expansion mode, and then the expansion mode of the DMRS port of the CDM group can be indicated by 1 bit in the DCI.
  • the value of this bit is 0, indicating that the DMRS port expansion multiples of all CDM groups corresponding to type 1 are the same; the value of this bit is 1, indicating that the DMRS ports of some CDM groups in all CDM groups corresponding to type 1 Expand.
  • type 2 includes three DMRS port expansion modes, namely uniform expansion mode, non-uniform expansion 1 and non-uniform expansion 2.
  • the expansion mode of the DMRS port of the CDM group can be indicated by 2 bits in the DCI. For example, the value of this bit is 00, indicating that the DMRS port expansion multiples of all CDM groups corresponding to type 2 are the same; the value of this bit is 01, indicating that the DMRS of two CDM groups in all CDM groups corresponding to type 2 The port is expanded; the value of this bit is 10, indicating that the DMRS port of one CDM group in all CDM groups corresponding to type 2 is expanded.
  • the network device 420 can also send radio resource control (RRC) signaling to different terminal devices to configure the expansion mode of the DMRS port of the CDM group for the terminal device.
  • RRC signaling may include indication information indicating the DMRS port at which the terminal device receives the DMRS sequence.
  • the network device 420 may also send indication information to different terminal devices through broadcast.
  • Step 520 The terminal device 440 receives the instruction information sent by the network device 420.
  • Step 530 The terminal device 440 sends DMRS through the DMRS port of at least one expanded CDM group.
  • the terminal device 440 first determines the location of the time-frequency resource for transmitting DMRS, the DMRS port, and the location of the time-frequency resource for transmitting uplink data. Furthermore, the DMRS is sent at the position of the time-frequency resource of the DMRS through the DMRS port of the CDM group indicated by the indication information, and the uplink data is sent based on the time-frequency resource other than the time-frequency resource occupied by the DMRS in the RB.
  • the terminal device 440 may determine the location of the time domain resource for transmitting the DMRS according to the mapping type of the DMRS and the time domain location of the DMRS.
  • the terminal device 440 may determine the location of the frequency domain resource for transmitting the DMRS according to the configuration type of the DMRS.
  • the terminal device 440 can obtain the mapping type of DMRS, the time domain resource location of DMRS, and the configuration type of DMRS by looking up a table or parameters in RRC signaling.
  • the mapping types of DMRS include mapping type A and mapping type B.
  • the configuration types of DMRS include configuration type 1 and configuration type 2.
  • the terminal device 440 may determine the expansion mode of the DMRS port of at least one CDM group according to the instruction information sent by the network device 420, and then the terminal device 440 sends DMRS through the expanded DMRS port of at least one CDM group.
  • the DMRS ports of at least one CDM group include traditional DMRS ports and extended DMRS ports.
  • the traditional DMRS port can be the port specified by 3GPP TS 38.211 V16.7.0.
  • the extended DMRS port may be a DMRS port that has been extended according to the extension mode indicated by the indication information.
  • the instruction information includes first information, and the terminal device 440 determines to expand the DMRS ports of all CDM groups corresponding to the DMRS configuration type, that is, the DMRS ports of all CDM groups corresponding to the DMRS configuration type have the same expansion multiple.
  • the indication information includes second information
  • the terminal device 440 determines to expand the DMRS ports of some CDM groups in the CDM group corresponding to the configuration type of DMRS, that is, to expand the DMRS ports of some CDM groups in all CDM groups corresponding to the configuration type of DMRS. port for expansion.
  • the terminal device 440 can determine different non-uniform expansion methods according to the second information, such as extending the DMRS port of one of the two CDM groups corresponding to type 1, but not expanding the DMRS port of the other CDM group; The three CDMs corresponding to 2 The DMRS ports of the two CDM groups in the group are expanded, and the DMRS ports of the other CDM group are not expanded; or the DMRS ports of one of the three CDM groups corresponding to type 2 are expanded, and the DMRS ports of the other two CDM groups are expanded. Not extended.
  • Step 540 The network device 420 receives the DMRS sent by the terminal device 440 through the DMRS port of at least one expanded CDM group.
  • the network device 420 receives DMRS and uplink data on the time-frequency resources configured for the terminal device 440, and through at least one extended CDM
  • the DMRS port of the group receives DMRS.
  • the DMRS ports of the extended CDM group include DMRS port 0 to DMRS port 3, the terminal device 440 sends DMRS through DMRS port 0 to DMRS port 3, and the network device 420 receives DMRS through DMRS port 0 to DMRS port 3.
  • the DMRS estimation is performed Uplink equivalent channel and demodulate the uplink data.
  • terminal equipment and network equipment can transmit more data layers, thereby not only increasing the rate at which a single terminal equipment sends data, but also increasing the number of uplink data transmissions between the system and network equipment.
  • the number of terminal devices effectively increases system capacity.
  • the terminal device 440 sends uplink data to the network device 430 as an example to illustrate the process of sending and receiving the demodulation reference signal.
  • the network device 430 sends downlink data to the terminal device 440, it can also determine the expansion method of the DMRS port based on the delay expansion of the downlink channel (such as PDSCH), and send instruction information to the terminal device 440 to instruct the DMRS port of the CDM group to be expanded.
  • the network device 420 sends DMRS through the DMRS port of the expanded CDM group, so that the terminal device 440 receives DMRS through the DMRS port of the expanded CDM group.
  • step 510 Regarding the expansion method of determining the DMRS port based on the time delay spread of the downlink channel (eg, PDSCH), reference may be made to the description in step 510 above about the method of determining the DMRS port expansion based on the time delay spread of the uplink channel (eg, PUSCH).
  • uplink data/downlink data may be uplink and downlink service data, or may be uplink and downlink signaling data, which is not limited in the embodiments of this application.
  • mapping type A takes the DMRS mapping type as mapping type A as an example to illustrate the expansion method of the DMRS port of the CDM group.
  • the two CDM groups corresponding to type 1 include CDM group 0 and CDM group 1.
  • the two CDM groups corresponding to type 2 include CDM group 0, CDM group 1 and CDM group 2.
  • Method 1 If the delay expansion of the channel of the terminal equipment to be scheduled is less than the first threshold, the DMRS ports of the two CDM groups corresponding to type 1 are expanded by 2 times.
  • FIG. 6 shows an expansion method of a type 1 DMRS port provided by an embodiment of the present application.
  • DMRS occupies a single symbol.
  • the two DMRS ports mapped by CDM group 0 are expanded to four DMRS ports, such as DMRS port 0, DMRS port 1, DMRS port 2 and DMRS port 3.
  • CDM group The 2 mapped DMRS ports of 1 are extended to 4 DMRS ports, such as DMRS port 4, DMRS port 5, DMRS port 6 and DMRS port 7.
  • DMRS occupies two symbols. Conduct DMRS for both CDM Group 0 and CDM Group 1 After port expansion, the 4 DMRS ports mapped by CDM group 0 are expanded to 8 DMRS ports, such as DMRS port 0 to DMRS port 7, and the 4 DMRS ports mapped by CDM group 1 are expanded to 8 DMRS ports, such as DMRS port 8 to DMRS port 15.
  • Method 2 If the channel delay expansion of some of the terminal devices to be scheduled is greater than or equal to the first threshold, among the two CDM groups corresponding to type 1, the DMRS port of one CDM group is expanded by 3 times, and the DMRS port of one CDM group is expanded by 3 times. The DMRS port is not expanded.
  • Figure 7 shows an expansion method of a type 1 DMRS port provided by an embodiment of the present application.
  • DMRS occupies a single symbol.
  • the 2 DMRS ports mapped by CDM group 0 are expanded to 6 DMRS ports, such as DMRS port 0 to DMRS port 5.
  • the DMRS ports of CDM group 1 are not expanded, and CDM group 1 Map to 2 DMRS ports, such as DMRS port 6 and DMRS port 7.
  • DMRS occupies two symbols. After three-fold expansion of the DMRS ports of CDM group 0, the 4 DMRS ports mapped by CDM group 0 are expanded to 12 DMRS ports, such as DMRS port 0 to DMRS port 11. The DMRS ports of CDM group 1 are not expanded, and CDM group 1 Map to 4 DMRS ports, such as DMRS port 12 to DMRS port 15.
  • Method 1 If the delay expansion of the channel of the terminal equipment to be scheduled is less than the first threshold, the DMRS ports of the three CDM groups corresponding to type 2 are expanded by 2 times.
  • FIG. 8 shows an expansion method of a type 2 DMRS port provided by the embodiment of the present application.
  • DMRS occupies a single symbol.
  • CDM group 1 and CDM group 2 the 2 DMRS ports mapped by CDM group 0 are expanded to 4 DMRS ports, such as DMRS port 0 to DMRS port 3, and 2 mapped by CDM group 1.
  • One DMRS port is expanded to 4 DMRS ports, such as DMRS port 4 to DMRS port 7, and the 2 DMRS ports mapped by CDM group 2 are expanded to 4 DMRS ports, such as DMRS port 8 to DMRS port 11.
  • DMRS occupies two symbols.
  • CDM group 1 and CDM group 2 the 4 DMRS ports mapped by CDM group 0 are expanded to 8 DMRS ports, such as DMRS port 0 to DMRS port 7, and 4 mapped by CDM group 1.
  • One DMRS port is expanded to 8 DMRS ports, such as DMRS port 8 to DMRS port 15, and the 4 DMRS ports mapped by CDM group 2 are expanded to 8 DMRS ports, such as DMRS port 16 to DMRS port 23.
  • Method 2 If the delay spread of the channels of the first part of the terminal devices to be scheduled is greater than or equal to the first threshold and less than the second threshold, and the delay spread of the channels of the second part of the terminal devices is greater than or equal to the second threshold , among the three CDM groups corresponding to type 2, the DMRS port of one CDM group is expanded by 3 times, the DMRS port of one CDM group is expanded by 2 times, and the DMRS port of one CDM group is not expanded.
  • FIG. 9 shows an expansion method of a type 2 DMRS port provided by an embodiment of the present application.
  • DMRS occupies a single symbol.
  • the 2 DMRS ports mapped by CDM group 0 are expanded to 6 DMRS ports, such as DMRS port 0 to DMRS port 5.
  • the 2 DMRS ports mapped by CDM group 1 are expanded to 4 DMRS ports, such as DMRS port 6 to DMRS port 9, the DMRS ports of CDM group 2 are not expanded, and CDM group 2 is mapped to 2 DMRS ports, such as DMRS port 10 and DMRS Port 11.
  • DMRS occupies two symbols.
  • the 4 DMRS ports mapped by CDM group 0 are expanded to 12 DMRS ports, such as DMRS port 0 to DMRS port 11.
  • the 4 DMRS ports mapped by CDM group 1 are expanded to 8 DMRS ports, such as DMRS port 12 to DMRS port 19, the DMRS ports of CDM group 2 are not expanded, and CDM group 2 is mapped to 4 DMRS ports, such as DMRS port 20 to DMRS port 23.
  • Method 3 If the delay expansion of the channels of the first part of the terminal equipment to be scheduled is greater than or equal to the second threshold, and the delay expansion of the channels of all other terminal equipment is less than the first threshold, the three corresponding to type 2 In a CDM group, the DMRS port of one CDM group is expanded 4 times, and the DMRS port of two CDM groups is not expanded.
  • FIG. 10 shows an expansion method of a type 2 DMRS port provided by an embodiment of the present application.
  • DMRS occupies a single symbol.
  • the 2 DMRS ports mapped by CDM group 0 are expanded to 8 DMRS ports, such as DMRS port 0 to DMRS port 7.
  • the DMRS ports of CDM group 1 are not expanded, and CDM group 1 Map to 2 DMRS ports, such as DMRS port 8 and DMRS port 9, the DMRS port of CDM group 2 is not extended, CDM group 2 is mapped to 2 DMRS ports, such as DMRS port 10 and DMRS port 11.
  • DMRS occupies two symbols. After 4-fold expansion of the DMRS ports of CDM group 0, the 4 DMRS ports mapped by CDM group 0 are expanded to 16 DMRS ports, such as DMRS port 0 to DMRS port 15. The DMRS ports of CDM group 1 are not expanded, and CDM group 1 Map to 4 DMRS ports, such as DMRS port 16 and DMRS port 19, the DMRS port of CDM group 2 is not extended, CDM group 2 is mapped to 4 DMRS ports, such as DMRS port 20 to DMRS port 23.
  • the above embodiment is an explanation of the extended method of determining the DMRS port of at least one CDM group in the CDM group based on the channel information of the terminal device.
  • Embodiments of the present application also provide a DMRS sequence generation method, which is used to generate DMRS sent through a DMRS port of an extended CDM group.
  • the DMRS transmitted and transmitted based on the DMRS port of the unexpanded CDM group can adopt the traditional (such as: 3GPP TS 38.211 V16.7.0 regulations) generation method.
  • formula (1) is used to generate the uplink DMRS sequence for DMRS port transmission (such as transmission or reception) of the extended CDM group.
  • formula (2) is used to generate a downlink DMRS sequence for DMRS port transmission (such as transmission or reception) of the extended CDM group.
  • M is used to indicate the expansion mode of the DMRS port of at least one CDM group in the CDM group.
  • m represents the delay domain offset of the DMRS port.
  • the network device determines the value of M based on the delay spread of the channels of all currently scheduled terminal devices.
  • the value of M may indicate the first information or the second information.
  • the value of m is related to the index of the DMRS port, and different DMRS port indexes correspond to different values of m.
  • Network equipment and terminal equipment can be pre-configured with the meaning of the values of M, m and m/M. After the terminal equipment obtains the value of M or m or m/M, it can determine the expansion of the DMRS port of the CDM group according to the configured rules. Way.
  • the network device indicates the value of M and the value of m to the terminal device respectively.
  • M 6, which means that among the two CDM groups corresponding to type 1, the DMRS port of one CDM group is expanded by 3 times, and the DMRS port of one CDM group is not expanded.
  • the value of m is related to the value of M and the DMRS port index.
  • the value of m is bound to the index of the DMRS port for joint indication, and different DMRS ports correspond to different values of m.
  • index 0 to index 7 in Table 1 are traditional DMRS ports, and the value of m is all 0; index 8 to index 15 are newly added extended DMRS ports, and the value of m is all 1.
  • the DMRS port of CDM group 0 and the DMRS port of CDM group 1 are both expanded by 2 times.
  • M 6, the value of m is added to the DMRS parameter table of type 1.
  • index 0 to index 7 in Table 2 are traditional DMRS ports, and the value of m is all 0; index 8 to index 15 are newly added extended DMRS ports, and the DMRS ports at index 8, 9, 12, and 13 correspond to The values of m are all 1, and the values of m corresponding to the DMRS ports with indexes 10, 11, 14, and 15 are all 2.
  • the DMRS port of CDM group 0 is expanded by 3 times, and the DMRS port of CDM group 1 is not expanded.
  • M 2, indicating that the DMRS ports of the three CDM groups corresponding to type 2 are expanded by 2 times.
  • the value of m is related to the value of M and the DMRS port index.
  • the value of m is bound to the index of the DMRS port for joint indication, and the values of m correspond to different DMRS ports.
  • index 0 to index 11 in Table 3 are traditional DMRS ports, and the value of m is all 0; index 12 to index 23 are newly added extended DMRS ports, and the value of m is all 1.
  • the DMRS port of CDM group 0, the DMRS port of CDM group 1 and the DMRS port of CDM group 2 are all expanded by 2 times.
  • index 0 to index 11 in Table 4 are traditional DMRS ports, and the value of m is all 0; index 12 to index 23 are newly added extended DMRS ports, and the value of m is 1 or 1.5 or 2.
  • the DMRS port of CDM group 0 is expanded by 3 times, the DMRS port of CDM group 0 is expanded by 2 times, and the DMRS port of CDM group 2 is not expanded.
  • index 0 to index 11 in Table 5 are traditional DMRS ports, and the value of m is all 0; index 12 to index 23 are newly added extended DMRS ports, and the value of m is 1, 2, or 3.
  • the DMRS port of CDM group 0 is expanded by 4 times, the DMRS port of CDM group 1 and the DMRS port of CDM group 2 are not expanded.
  • the terminal device obtains the M indicated by the network device, and can determine the expansion mode of the DMRS port of at least one CDM group in the CDM group corresponding to the DMRS configuration type based on the value of M, and determine the value of m based on the index of the DMRS port.
  • the DMRS sequence can be generated.
  • the expansion method of the DMRS port of the CDM group can be determined, and the DMRS sequence sent based on the expanded DMRS port can be determined.
  • the network device indicates the value of m/M to the terminal device.
  • the value of m/M is related to the value of M and the index of the DMRS port.
  • the value of m/M is bound to the index of the DMRS port for joint indication.
  • index 0 to index 7 in Table 6 are traditional DMRS ports, and the values of m/M are all 0; index 8 to index 15 are newly added extended DMRS ports, and the values of m/M are all 1/4.
  • the DMRS port of CDM group 0 and the DMRS port of CDM group 1 are both expanded by 2 times.
  • M 6, the value of m/M is added to the DMRS parameter table of type 1.
  • index 0 to index 7 in Table 7 are traditional DMRS ports, and the values of m/M are all 0; index 8 to index 15 are newly added extended DMRS ports, and half of the new extended DMRS ports are m/
  • the value of M is 1/6, that is, the value of m of the DMRS ports with indexes 8, 9, 12, and 13 is all 1/6.
  • the value of m/M of the other half of the DMRS ports in the newly added extended DMRS ports is 1/ 3, that is, the values of m of the DMRS ports at indexes 10, 11, 14, and 15 are all 1/3.
  • the DMRS port of CDM group 0 is expanded by 3 times, and the DMRS port of CDM group 1 is not expanded.
  • m/M includes 0 and 1/4, it means that the DMRS ports of the two CDM groups corresponding to type 1 are evenly expanded.
  • the m/M value of all traditional DMRS ports is 0, and the m/M value of all extended DMRS ports is 1/4.
  • m/M includes 0, 1/3 and 1/6, it means that the DMRS ports of the two CDM groups corresponding to type 1 are non-uniformly expanded.
  • the m/M values of all traditional DMRS ports are 0, the m/M values of half of the extended DMRS ports are 1/3, and the m/M values of half of the DMRS ports are 1/6 .
  • index 0 to index 11 in Table 8 are traditional DMRS ports, and the values of m/M are all 0; index 12 to index 23 are newly added extended DMRS ports, and the values of m/M are all 1/2.
  • the DMRS ports of CDM group 0, CDM group 1 and CDM group 2 are all expanded by 2 times.
  • index 0 to index 11 in Table 9 are traditional DMRS ports, and the values of m/M are all 0; index 12 to index 23 are the newly added extended DMRS ports, and the DMRS ports at index 14, 15, 20, and 21
  • the corresponding m/M values are all 1/2, the m/M values corresponding to the DMRS ports with indexes 12, 13, 18, and 19 are all 1/3, and the DMRS ports with indexes 16, 17, 22, and 23
  • the corresponding values of m/M are all 2/3.
  • the DMRS port of CDM group 0 is expanded by 3 times, the DMRS port of CDM group 1 is expanded by 2 times, and the DMRS port of CDM group 2 is not expanded.
  • index 0 to index 11 in Table 10 are traditional DMRS ports, and the values of m/M are all 0; index 12 to index 23 are the newly added extended DMRS ports, and the DMRS ports at index 16, 17, 22, and 23
  • the corresponding m/M values are all 1/2, the m/M values corresponding to the DMRS ports with indexes 12, 13, 18, and 19 are all 1/4, and the DMRS ports with indexes 14, 15, 20, and 21
  • the corresponding values of m/M are all 3/4.
  • the DMRS port of CDM group 0 is expanded by 4 times, and the DMRS port of CDM group 1 and the DMRS port of CDM group 2 are not expanded.
  • m/M includes 0 and 1/2, it means that the DMRS ports of the three CDM groups corresponding to type 2 are evenly expanded.
  • the m/M value of all traditional DMRS ports is 0, and the m/M value of all extended DMRS ports is 1/2.
  • the value of m/M includes 0, 1/2, 1/3 and 2/3, it means that the DMRS ports of the three CDM groups corresponding to type 2 are non-uniformly expanded.
  • the m/M values of all traditional DMRS ports are 0.
  • the m/M values of the four DMRS ports in the extended DMRS ports are all 1/2.
  • the m/M values of the four DMRS ports are all 1. /3, the m/M values of the four DMRS ports are all 2/3.
  • the value of m/M includes 0, 1/2, 1/4 and 3/4, it means that the DMRS ports of the three CDM groups indicated by type 2 are non-uniformly expanded.
  • the values of m/M of all traditional DMRS ports are 0, the values of m/M of the four DMRS ports in the extended DMRS ports are all 1/2, and the values of m/M of the four DMRS ports are all 1/4.
  • the values of m/M for the four DMRS ports are all 3/4.
  • the terminal device obtains the M and m/M indicated by the network device.
  • the expansion mode of the DMRS port of at least one CDM group in the CDM group corresponding to the DMRS configuration type can be determined, and determined according to the index of the DMRS port.
  • the value of m/M is substituted into formula (1) to generate a DMRS sequence.
  • the expansion method of the DMRS port of the CDM group can be determined, and the DMRS sequence sent based on the expanded DMRS port can be determined.
  • Network equipment and terminal equipment can pre-configure multiple values of the sequence within a cycle, and then the network equipment instructs the terminal equipment which value to choose. kind of value.
  • the DMRS configuration type is type 1
  • DMRS ports are extended for all CDM groups indicated by type 1
  • the values of the extended DMRS ports m/M are all 1/4, so within one cycle ( The value from 0 to 3) is [1,j,-1,-j].
  • DMRS port expansion is performed on some CDM groups in the CDM group indicated by type 1, the value of M is 6, and the value of part of the extended DMRS port m is 1, so within one cycle ( The value from 0 to 5) is [1, e j ⁇ /3 , e j2 ⁇ /3 , e j ⁇ , e j4 ⁇ /3 , e j5 ⁇ /3 ]; the value of the partial extended DMRS port m is 2, so within one cycle ( The value from 0 to 2) is [1, e j2 ⁇ /3 , e j4 ⁇ /3 ]. It can be indicated by DCI as one of two values.
  • the values of the extended DMRS ports m/M are all 1/2, so within one cycle ( The value from 0 to 1) is [1,-1].
  • the m/M value of the four ports in the expanded DMRS ports is 1/2, so within one cycle ( The value from 0 to 1) is [1,-1]; the value of the four ports m/M is 1/3, so within one cycle ( The value from 0 to 2) is [1,e j2 ⁇ /3 ,e j4 ⁇ /3 ]; the values of the four ports m/M are all 2/3, so within one cycle ( The value from 0 to 2) is [1,e j4 ⁇ /3 ,e j8 ⁇ /3 ]. It can be indicated by DCI as one of three values.
  • the m/M value of the four ports in the expanded DMRS port is 1/4, so within one cycle ( The value from 0 to 3) is [1,j,-1,-j]; the value of the four ports m/M is 1/2, so within one cycle ( The value from 0 to 1) is [1,-1]; the value of the four ports m/M is 3/4, so within one cycle ( The value from 0 to 3) is [1,e j3 ⁇ /2 ,e j3 ⁇ ,e j9 ⁇ /2 ]. It can be indicated by DCI as one of three values.
  • the terminal device obtains the information indicated by the network device Will Substituting the value of into formula (1), the DMRS sequence can be generated.
  • the expansion method of the DMRS port of the CDM group can be determined, and the DMRS sequence sent based on the expanded DMRS port can be determined.
  • the network device and the terminal device include corresponding hardware structures and/or software modules that perform each function.
  • the units and method steps of each example described in conjunction with the embodiments disclosed in this application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software driving the hardware depends on the specific application scenarios and design constraints of the technical solution.
  • the method for transmitting and receiving a demodulation reference signal according to this embodiment is described in detail above with reference to FIGS. 1 to 10 .
  • the communication device provided according to this embodiment will be described below with reference to FIG. 11 .
  • Figure 11 is a schematic structural diagram of a possible communication device provided in this embodiment.
  • These communication devices can be used to implement the functions of the terminal equipment or network equipment in the above method embodiments, and therefore can also achieve the beneficial effects of the above method embodiments.
  • the communication device may be a terminal device 440 as shown in Figure 4, a network device 420 as shown in Figure 4, or a module applied to a terminal device or a network device (such as chip).
  • the communication device 1100 includes a processing unit 1110 and a transceiver unit 1120 .
  • Communication device 1100 It is used to implement the functions of the terminal device 440 or the network device 420 in the method embodiment shown in FIG. 5 .
  • the transceiver unit 1120 is configured to receive indication information, where the indication information is used to indicate an expansion mode of a DMRS port of at least one CDM group among multiple CDM groups corresponding to a DMRS configuration type. For example, the transceiver unit 1120 is used to perform step 520 in FIG. 5 .
  • the transceiver unit 1120 is configured to send DMRS through the extended DMRS port of at least one CDM group, where the DMRS port of the at least one CDM group includes a traditional DMRS port and an extended DMRS port.
  • the transceiver unit 1120 is used to perform step 530 in FIG. 5 .
  • the processing unit 1110 is configured to determine, according to the indication information, an expansion mode of the DMRS port of at least one CDM group in the CDM group corresponding to the DMRS configuration type, and generate a DMRS sequence.
  • the transceiver unit 1120 is configured to send indication information, where the indication information is used to indicate an expansion mode of a DMRS port of at least one CDM group among multiple CDM groups corresponding to a DMRS configuration type. For example, the transceiver unit 1120 is used to perform step 510 in FIG. 5 .
  • the transceiver unit 1120 is configured to receive DMRS through the DMRS port of at least one expanded CDM group.
  • the DMRS port of the at least one CDM group includes a traditional DMRS port and an extended DMRS port.
  • the DMRS is used to demodulate uplink data.
  • the transceiver unit 1120 is used to perform step 540 in FIG. 5 .
  • the processing unit 1110 is configured to determine the expansion mode of the DMRS port of at least one CDM group in the CDM group corresponding to the DMRS configuration type, and generate a DMRS sequence.
  • the transceiver unit 1120 is configured to receive indication information, where the indication information is used to indicate an expansion mode of a DMRS port of at least one CDM group among multiple CDM groups corresponding to a DMRS configuration type.
  • the transceiver unit 1120 is configured to receive DMRS through the DMRS port of at least one expanded CDM group.
  • the DMRS port of the at least one CDM group includes a traditional DMRS port and an extended DMRS port.
  • the DMRS is used to demodulate downlink data.
  • the processing unit 1110 is configured to determine, according to the indication information, an expansion mode of the DMRS port of at least one CDM group in the CDM group corresponding to the DMRS configuration type, and generate a DMRS sequence.
  • the transceiver unit 1120 is configured to send indication information, where the indication information is used to indicate an expansion mode of a DMRS port of at least one CDM group among multiple CDM groups corresponding to a DMRS configuration type.
  • the transceiver unit 1120 is configured to send DMRS through the extended DMRS port of at least one CDM group, where the DMRS port of the at least one CDM group includes a traditional DMRS port and an extended DMRS port.
  • the processing unit 1110 is configured to determine the expansion mode of the DMRS port of at least one CDM group in the CDM group corresponding to the DMRS configuration type, and generate a DMRS sequence.
  • the communication device 1100 may correspond to performing the method described in the embodiment of the present application, and the above and other operations and/or functions of each unit in the communication device 1100 are respectively to implement the corresponding methods of each method in Figure 5 The process, for the sake of brevity, will not be repeated here.
  • the communication device 1200 includes a processor 1210 and an interface circuit 1220 .
  • the processor 1210 and the interface circuit 1220 are coupled to each other.
  • the interface circuit 1220 may be a transceiver or an input-output interface.
  • the communication device 1200 may also include a memory 1230 for storing instructions executed by the processor 1210 or input data required for the processor 1210 to run the instructions or data generated after the processor 1210 executes the instructions.
  • the processor 1210 is used to perform the functions of the above-mentioned processing unit 1110
  • the interface circuit 1220 is used to perform the functions of the above-mentioned transceiver unit 1120 .
  • the terminal device chip implements the functions of the terminal device in the above method embodiment.
  • the terminal equipment chip receives information from other modules (such as radio frequency modules or antennas) in the terminal equipment, and the information is sent by the network equipment to the terminal equipment; or, the terminal equipment chip sends information to other modules (such as radio frequency modules or antennas) in the terminal equipment.
  • Antenna sends information, which is sent by the terminal device to the network device.
  • the network device chip When the above communication device is a chip applied to a network device, the network device chip implements the functions of the network device in the above method embodiment.
  • the network device chip receives information from other modules in the network device (such as a radio frequency module or antenna), and the information is sent by the terminal device to the network device; or, the network device chip sends information to other modules in the network device (such as a radio frequency module or antenna).
  • Antenna sends information, which is sent by the network device to the terminal device.
  • the processor in the embodiment of the present application can be a central processing unit (Central Processing Unit, CPU), or other general-purpose processor, digital signal processor (Digital Signal Processor, DSP), or application specific integrated circuit. (Application Specific Integrated Circuit, ASIC), 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 method steps in the embodiments of the present application can be implemented by hardware or by a processor executing software instructions.
  • Software instructions can be composed of corresponding software modules, which can be stored in random access memory (Random Access Memory, RAM), flash memory, read-only memory (Read-Only Memory, 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), register, hard disk, mobile hard disk, CD-ROM or other well-known in the art any other form of storage media.
  • An exemplary storage medium is coupled to the processor such that the processor can read information from the storage medium and write information to the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and storage media may be located in an ASIC.
  • the ASIC can be located in network equipment or terminal equipment.
  • the processor and the storage medium can also exist as discrete components in network equipment or terminal equipment.
  • the computer program product includes one or more computer programs or instructions.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, a network device, a user equipment, or other programmable device.
  • the computer program or instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another, for example, the computer program or instructions may be transferred from one computer-readable storage medium to another.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media.
  • the available media may be magnetic media, such as floppy disks, hard disks, and magnetic tapes; they may also be optical media, such as digital video discs (DVDs); they may also be semiconductor media, such as solid state drives (solid state drives). ,SSD).
  • “at least one” refers to one or more, and “plurality” refers to two or more.
  • “And/or” describes the relationship between associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the related objects before and after are an “or” relationship; in the formula of this application, the character “/” indicates that the related objects before and after are a kind of "division” Relationship.

Landscapes

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

Abstract

本申请公开了发送解调参考信号的方法及装置，涉及通信领域。该方法包括：终端设备接收指示信息，指示信息用于指示一个DMRS的配置类型对应的多个码分复用CDM组中至少一个CDM组的DMRS端口的扩展方式；通过经过扩展的至少一个CDM组的DMRS端口发送DMRS，至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口。如此，终端设备根据指示信息对DMRS的配置类型对应的CDM组进行灵活地扩展，通过经过扩展的CDM组的DMRS端口发送DMRS，在不同场景下确保DMRS端口正交，发送更多层数的数据，从而提升NR系统的容量。

Description

发送解调参考信号的方法及装置
本申请要求于2022年4月29日提交国家知识产权局、申请号为202210469096.0、申请名称为“发送解调参考信号的方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信技术领域，尤其涉及一种发送解调参考信号的方法及装置。
背景技术
为了应对未来爆炸性的移动数据流量增长、海量移动通信的设备连接、不断涌现的各类新业务和应用场景，第五代(the fifth generation，5G)移动通信系统应运而生，5G移动通信系统又称为新无线接入技术(new radio access technology，NR)系统。
NR系统中，网络设备向终端设备发送下行数据伴随发送解调参考信号(demodulation reference signal，DMRS或DM-RS)；或者，终端设备向网络设备发送上行数据伴随发送DMRS。DMRS采用与数据相同的预编码矩阵。经过层映射的每层数据需要分配一个DMRS端口以便传输DMRS，利用DMRS来估计该层数据的等效信道。目前，基于多进多出(multiple-in multipleout，MIMO)技术可以发送多层数据，多层数据对应的多个DMRS端口互相正交。
随着MIMO技术的发展，收发端天线数目的增多，待发送数据经过层映射可以映射更多的层数，以实现更高效的数据传输。现有技术中适配于较少层数的DMRS端口设计难以满足限制了数据传输效率。因此，如何设计DMRS端口以适配更多的层数，以提升NR系统的容量是一个亟待解决的问题。
发明内容
本申请提供了发送解调参考信号的方法及装置，由此来提升发送数据流的层数，进而提升NR系统的容量。
第一方面，提供一种发送解调参考信号的方法，该方法可应用于终端设备，或者该方法可应用于可以支持终端设备实现该方法的通信装置，例如该通信装置包括芯片系统。该方法包括：终端设备接收指示信息，指示信息用于指示一个DMRS的配置类型对应的多个码分复用(Code Division Multiplexing，CDM)组中至少一个CDM组的DMRS端口的扩展方式；通过经过扩展的至少一个CDM组的DMRS端口发送DMRS，至少一个CDM组的DMRS端口包括传统(legacy)DMRS端口和扩展(expanded)DMRS端口。DMRS用于解调上行数据。
如此，终端设备根据指示信息对DMRS的配置类型对应的CDM组进行灵活地扩展，通过经过扩展的CDM组的DMRS端口发送DMRS，则在不同场景下确保DMRS端口正交，发送更多层数的数据，从而提升NR系统的容量。
第二方面，提供一种接收解调参考信号的方法，该方法可应用于网络设备，或者该方法可应用于可以支持网络设备实现该方法的通信装置，例如该通信装置包括芯片 系统。该方法包括：网络设备发送指示信息，指示信息用于指示一个DMRS的配置类型对应的多个CDM组中至少一个CDM组的DMRS端口的扩展方式；通过经过扩展的至少一个CDM组的DMRS端口接收DMRS，至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口，DMRS用于解调上行数据。
如此，网络设备指示终端设备根据指示信息对DMRS的配置类型对应的CDM组进行灵活地扩展，使网络设备通过经过扩展的CDM组的DMRS端口接收DMRS，则在不同场景下确保DMRS端口正交，接收更多层数的数据，从而提升NR系统的容量。
第三方面，提供一种接收解调参考信号的方法，该方法可应用于终端设备，或者该方法可应用于可以支持终端设备实现该方法的通信装置，例如该通信装置包括芯片系统。该方法包括：终端设备接收指示信息，指示信息用于指示一个DMRS的配置类型对应的多个CDM组中至少一个CDM组的DMRS端口的扩展方式；通过经过扩展的至少一个CDM组的DMRS端口接收DMRS，至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口，DMRS用于解调下行数据。
如此，终端设备根据指示信息对DMRS的配置类型对应的CDM组进行灵活地扩展，通过经过扩展的CDM组的DMRS端口接收DMRS，则在不同场景下确保DMRS端口正交，接收更多层数的数据，从而提升NR系统的容量。
第四方面，提供一种发送解调参考信号的方法，该方法可应用于网络设备，或者该方法可应用于可以支持网络设备实现该方法的通信装置，例如该通信装置包括芯片系统。该方法包括：网络设备发送指示信息，指示信息用于指示一个DMRS的配置类型对应的多个码分复用CDM组中至少一个CDM组的DMRS端口的扩展方式；通过经过扩展的至少一个CDM组的DMRS端口发送DMRS，至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口。DMRS用于解调下行数据。
如此，网络设备根据指示信息对DMRS的配置类型对应的CDM组进行灵活地扩展，使网络设备通过经过扩展的CDM组的DMRS端口发送DMRS，则在不同场景下确保DMRS端口正交，发送更多层数的数据，从而提升NR系统的容量。
在一种可能的实现方式中，根据待调度的终端设备的信道的时延扩展(delay spread)确定CDM组的DMRS端口的扩展方式。
在待调度的终端设备的信道的时延扩展均小于第一阈值时，扩展方式用于指示对DMRS的配置类型对应的全部CDM组进行DMRS端口扩展，信道包括上行信道和下行信道；或者，在待调度的终端设备中部分终端设备的信道的时延扩展大于或等于第一阈值时，扩展方式用于指示DMRS的配置类型对应的多个CDM组中部分CDM组进行DMRS端口扩展。
在一种示例中，DMRS的配置类型包括第一配置类型。
例如，在待调度的终端设备的信道的时延扩展均小于第一阈值时，第一配置类型对应的两个CDM组中每个CDM组的DMRS端口扩展2倍。
又如，在待调度的终端设备中部分终端设备的信道的时延扩展大于或等于第一阈值时，第一配置类型对应的第一CDM组和第二CDM组中，第一CDM组的DMRS端口扩展3倍，第二CDM组的DMRS端口不扩展。
在另一种示例中，DMRS的配置类型还包括第二配置类型。
例如，在待调度的终端设备的信道的时延扩展均小于第一阈值时，第二配置类型对应的三个CDM中每个CDM组的DMRS端口扩展2倍。
又如，在待调度的终端设备中第一部分终端设备的信道的时延扩展大于或等于第一阈值且小于第二阈值，且第二部分终端设备的信道的时延扩展大于或等于所述第二阈值时，第二配置类型对应的第三CDM组、第四CDM组和第五CDM组中，第三CDM组的DMRS端口扩展3倍，第四CDM组的DMRS端口扩展2倍，第五CDM组的DMRS端口不扩展；第一阈值小于第二阈值。
又如，在待调度的终端设备中第一部分终端设备的信道的时延扩展大于或等于第二阈值且第二部分终端设备的信道的时延扩展均小于第一阈值，时，第二配置类型对应的第三CDM组、第四CDM组和第五CDM组中，第三CDM组的DMRS端口扩展4倍，第四CDM组和第五CDM组的DMRS端口均不扩展，第一阈值小于第二阈值。
由于未进行DMRS端口扩展的CDM组中的DMRS端口在时延域间隔较远，即使该DMRS端口分配给信道时延扩展大的终端设备，也能一定程度上保证DMRS端口的正交性。此外，进行DMRS端口扩展的CDM组中的DMRS端口在时延域间隔较近，需要分配给信道时延扩展小的终端设备才能一定程度上保证DMRS端口的正交性。因此，将未进行DMRS端口扩展的CDM组中的DMRS端口优先分配给时延扩展大的终端设备，将进行DMRS端口扩展后的CDM组中的DMRS端口分配给时延扩展小的终端设备。
在另一种可能的实现方式中，指示信息用于指示系数中M的取值和m的取值；或者，指示信息用于指示系数中m/M的取值；或者，指示信息用于指示系数的取值。系数用于生成DMRS序列。
在另一种可能的实现方式中，指示信息是预先定义的；或者，指示信息通过控制信令配置的，控制信令包括无线资源控制(radio resource control，RRC)信令、媒体接入控制控制元素(Media Access Control Control Element，MAC-CE)和下行控制信息(downlink control information，DCI)中的至少一种。
第五方面，提供了一种通信装置，有益效果可以参见第一方面的描述此处不再赘述。所述通信装置具有实现上述第一方面的方法实施例中行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。在一个可能的设计中，该通信装置包括：收发单元和处理单元。所述收发单元，用于接收指示信息，以及通过经过扩展的至少一个CDM组的DMRS端口发送DMRS。其中，指示信息用于指示一个DMRS的配置类型对应的多个CDM组中至少一个CDM组的DMRS端口的扩展方式。至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口。所述处理单元，用于根据指示信息确定一个DMRS的配置类型对应的多个CDM组中至少一个CDM组的DMRS端口的扩展方式。这些模块可以执行上述第一方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第六方面，提供了一种通信装置，有益效果可以参见第二方面的描述此处不再赘述。所述通信装置具有实现上述第二方面的方法实施例中行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多 个与上述功能相对应的模块。在一个可能的设计中，该通信装置包括：收发单元和处理单元。所述收发单元，用于发送指示信息，以及通过经过扩展的至少一个CDM组的DMRS端口接收DMRS。指示信息用于指示一个DMRS的配置类型对应的多个CDM组中至少一个CDM组的DMRS端口的扩展方式。至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口。DMRS用于解调上行数据。所述处理单元，用于确定DMRS的配置类型对应的CDM组中至少一个CDM组的DMRS端口的扩展方式。这些模块可以执行上述第二方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第七方面，提供了一种通信装置，有益效果可以参见第三方面的描述此处不再赘述。所述通信装置具有实现上述第三方面的方法实施例中行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。在一个可能的设计中，该通信装置包括：收发单元和处理单元。所述收发单元，用于接收指示信息，以及通过经过扩展的至少一个CDM组的DMRS端口接收DMRS。指示信息用于指示一个DMRS的配置类型对应的多个CDM组中至少一个CDM组的DMRS端口的扩展方式。至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口。DMRS用于解调下行数据。所述处理单元，用于根据指示信息DMRS的配置类型对应的CDM组中至少一个CDM组的DMRS端口的扩展方式。这些模块可以执行上述第三方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第八方面，提供了一种通信装置，有益效果可以参见第四方面的描述此处不再赘述。所述通信装置具有实现上述第四方面的方法实施例中行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。在一个可能的设计中，该通信装置包括：收发单元和处理单元。所述收发单元，用于发送指示信息，以及通过经过扩展的至少一个CDM组的DMRS端口发送DMRS。指示信息用于指示一个DMRS的配置类型对应的多个CDM组中至少一个CDM组的DMRS端口的扩展方式。至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口。所述处理单元，用于确定DMRS的配置类型对应的CDM组中至少一个CDM组的DMRS端口的扩展方式。这些模块可以执行上述第四方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第九方面，提供了一种通信装置，该通信装置可以为上述方法实施例中的终端设备，或者为设置在终端设备中的芯片。该通信装置包括通信接口以及处理器，可选的，还包括存储器。其中，该存储器用于存储计算机程序或指令，处理器与存储器、通信接口耦合，当处理器执行所述计算机程序或指令时，使通信装置执行上述方法实施例中由终端设备所执行的方法。
第十方面，提供了一种通信装置，该通信装置可以为上述方法实施例中的网络设备，或者为设置在网络设备中的芯片。该通信装置包括通信接口以及处理器，可选的，还包括存储器。其中，该存储器用于存储计算机程序或指令，处理器与存储器、通信接口耦合，当处理器执行所述计算机程序或指令时，使通信装置执行上述方法实施例中由网络设备所执行的方法。
第十一方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码并运行时，使得上述各方面中由终端设备执行的方法被执行。
第十二方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被运行时，使得上述各方面中由网络设备执行的方法被执行。
第十三方面，提供了一种芯片系统，该芯片系统包括处理器，用于实现上述各方面的方法中终端设备的功能。在一种可能的设计中，所述芯片系统还包括存储器，用于保存程序指令和/或数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第十四方面，提供了一种芯片系统，该芯片系统包括处理器，用于实现上述各方面的方法中网络设备的功能。在一种可能的设计中，所述芯片系统还包括存储器，用于保存程序指令和/或数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第十五方面，提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序，当该计算机程序被运行时，实现上述各方面中由终端设备执行的方法。
第十六方面，提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序，当该计算机程序被运行时，实现上述各方面中由网络设备执行的方法。
第十七方面，提供了一种通信系统，所述通信系统包括第五方面描述的终端设备或支持终端设备实现该第一方面描述的方法的通信装置，以及第六方面描述的网络设备或支持网络设备实现该第二方面描述的方法的通信装置；
或所述通信系统包括第七方面描述的终端设备或支持终端设备实现该第三方面描述的方法的通信装置，以及第八方面描述的网络设备或支持网络设备实现该第四方面描述的方法的通信装置；
或所述通信系统包括第九方面描述的终端设备或支持终端设备实现该第一方面或第三方面描述的方法的通信装置，以及第十方面描述的网络设备或支持网络设备实现该第二方面或第四方面描述的方法的通信装置。
本申请中，终端设备、网络设备和通信装置的名字对设备本身不构成限定，在实际实现中，这些设备可以以其他名称出现。只要各个设备的功能和本申请类似，属于本申请权利要求及其等同技术的范围之内。
本申请在上述各方面提供的实现方式的基础上，还可以进行进一步组合以提供更多实现方式。
附图说明
图1为本申请实施例提供的一种码字处理过程示意图；
图2为本申请实施例提供的一种DMRS映射类型的示意图；
图3为本申请实施例提供的一种DMRS配置类型的示意图；
图4为本申请实施例提供的一种移动通信系统的架构示意图；
图5为本申请实施例提供的一种解调参考信号的发送接收方法流程图；
图6为本申请实施例提供的一种type 1的DMRS端口的扩展方案示意图；
图7为本申请实施例提供的另一种type 1的DMRS端口的扩展方案示意图；
图8为本申请实施例提供的一种type 2的DMRS端口的扩展方案示意图；
图9为本申请实施例提供的另一种type 2的DMRS端口的扩展方案示意图；
图10为本申请实施例提供的另一种type 2的DMRS端口的扩展方案示意图；
图11为本申请实施例提供的一种通信装置的结构示意图；
图12为本申请实施例提供的另一种通信装置的结构示意图。
具体实施方式
网络设备向终端设备发送数据的过程可以称为下行传输。终端设备向网络设备发送数据的过程可以称为上行传输。通常，网络设备或终端设备在传输数据前，对传输块(transport block，TB)中的原始比特进行校验码添加、码块分割、信道编码(channel coding)、速率匹配(rate matching)、码块级联、加扰(scrambling)、调制(modulation)、层映射(layer mapping)和多天线预编码(multi-antenna precoding)，生成基带信号并映射到天线上发送。
层映射是指对经过速率匹配后的码块进行码块级联得到的码字(code word)，进行加扰调制的调制符号映射到多个层上得到新的码流。NR系统中，最多支持并行处理2个码字，即并行处理2个从传输块到码字的过程。在层映射的过程中，包括1个码字的层映射和2个码字的层映射。1个码字指单码字流。2个码字指双码字流。单码字流最多可以映射到4层，双码字流最多可以映射到8层。
多天线预编码是指基于预编码矩阵(precoding matrix)将N层(layers)的码流映射到N个天线端口(antenna ports)，即将各个层的输出向量与一个预编码矩阵相乘，得到预编码的结果。层数和天线端口数一一对应。层数也可替换描述为“传输层数”。
层映射和多天线预编码的目的是为了将码字映射到天线端口上。多天线预编码之后，进行资源单元(Resource Element，RE)的资源映射和物理天线(physical antenna)的映射。如图1所示为本申请实施例提供的一种码字处理过程示意图。需要说明的是，除了频域分集、时域分集以外，多天线系统加入了空间分集，也就是不同的码流走不同的“路”。物理天线数是指多天线系统中实际的天线的数量，决定了空间分集的理论上限。但如果不同的物理天线所形成的“路”太近了，那么也就失去了空间分集的意义，此时不同的物理天线就是一条“路”。所以，天线端口数就是实际的“路”的多少，天线端口数小于或等于物理天线数。天线端口与物理天线并不是一一对应关系，有可能是一对多，也有可能是多对一。
为了提升上行传输的性能和下行传输的性能，需要提升接收机进行数据解调的性能。接收机的性能依赖于等效信道估计的精确度。所谓等效信道是指信道矩阵和预编码矩阵的乘积的结果。NR系统中，接收机采用解调参考信号(Demodulation Reference Signal，DMRS)进行上下行等效信道估计，进而解调数据。层映射后的每层数据需要分配一个DMRS端口，基于多天线预编码后的DMRS端口发送DMRS，以便于接收机接收到DMRS后，估计该层数据的等效信道和解调数据。因此，DMRS与数据伴随发送，采用与数据相同的预编码矩阵对DMRS进行多天线预编码。DMRS、层数与DMRS端口具有一一对应的关系。
网络设备可以指示终端设备接收DMRS的时频资源，以便于终端设备在网络设备 指示的DMRS的时频资源上接收DMRS，利用DMRS对下行等效信道进行估计，并对接收的网络设备发送的下行数据进行解调。网络设备可以指示终端设备发送DMRS的时频资源，终端设备在网络设备指示的DMRS的时频资源上发送DMRS，以便于网络设备在指示的DMRS的时频资源上接收DMRS，利用DMRS对上行等效信道进行估计，并对接收的终端设备发送的上行数据进行解调。
为了满足不同的部署场景，DMRS包含了两种不同的时域映射类型(mapping type)：映射类型A(Type A)和映射类别B(Type B)。这两种时域类型主要区别是资源块(resource block，RB)中承载DMRS的第一个符号的位置，即RB中DMRS的时域起始位置不同。
映射类型A的DMRS时域结构，RB中承载DMRS的第一个符号位于时隙内的符号(symbol)#2或symbol#3中。这种映射方式并不管实际数据传输的起始位置，而是固定将DMRS放在时隙相对边缘的位置。例如，位于物理下行控制信道(physical downlink control channel，PDCCH)之后。映射类型A主要用于数据传输占据了时隙绝大部分符号的场景。
示例地，图2中的(a)为本申请实施例提供的一种DMRS映射类型A的示意图。在频域上的最小单位是子载波，带宽可以为15KHz。在时域上的最小单位是时隙(slot)，一个时隙可以为1毫秒(millisecond，ms)。时频资源网格中的每一个小方格代表一个RE，一个RE在频域上的带宽为15KHz，在时域上为一个OFDM符号的长度。频域上12个连续的子载波，时域上1个slot组成一个RB。常规循环前缀(normal cyclic prefix，NCP)情况下，一个slot包括14个OFDM符号。RB中承载DMRS的第一个符号位于时隙内的symbol#2。
NR系统中，DMRS可以位于资源块(resource block，RB)中靠前的符号，即前置DMRS，有助于系统获得更低的处理时延。如此，接收机可以尽早进行信道估计，无论传输是否结束，接收机可以对已经缓存的接收数据进行相关解调，而不需要将所有的数据全部接收缓存下来再进行处理。
如果网络设备指示的映射类型为映射类型A，则DMRS的时域起始位置是相对于时隙的起始位置而言，主信息块(master information block，MIB)消息参数dmrs-TypeA-Position用于指示DMRS的时域起始位置。例如，若dmrs-TypeA-Position＝pos2，则DMRS的时域起始位置从时隙的symbol#2开始。又如，若dmrs-TypeA-Position＝pos3，则DMRS的时域起始位置从时隙的symbol#3开始。
映射类型B的DMRS时域结构，RB中承载DMRS的第一个符号固定位于映射在数据传输资源(如：PDSCH)的第一个符号中。此时，DMRS的时域起始位置不是相对时隙的起始位置symbol#0，而是相对于数据传输资源的起始位置。映射类型B主要用于数据传输只占据一个时隙的一小部分符号的场景，以减少传输时延。
示例地，图2中的(b)为本申请实施例提供的一种DMRS映射类型B的示意图。RB中承载DMRS的第一个符号位于时隙内的symbol#8。
网络设备确定DMRS的映射类型之后，可以确定DMRS的配置类型(configuration type)，即确定DMRS的频域资源。DMRS包含了两种不同的配置类型：配置类型1(type 1)和配置类型2(type 2)。
图3中的(a)为本申请实施例提供的一种DMRS Type 1的示意图。DMRS的频域资源在一个符号的频域间隔一个RE分布，密度为50％。目前，3GPP TS 38.211 V16.7.0规定偶数编号的子载波上的RE可以提供2个正交的DMRS端口。奇数编号的子载波上的RE也可以提供2个正交的DMRS端口。使用相同子载波的多个DMRS端口属于同一个码分复用(Code Division Multiplexing，CDM)组。type 1对应两个CDM组，例如CDM组0和CDM组1。单符号时每个CDM组可以提供2个正交的DMRS端口，双符号时每个CDM组可以提供4个正交的DMRS端口。由于不同CDM组的DMRS端口对应的DMRS序列占用了不同的频域资源，因此是互相正交的。同一个CDM组的不同DMRS端口对应的DMRS序列占用了相同的时频资源，采用正交覆盖码(orthogonal cover code，OCC)使得这些端口对应的DMRS序列互相正交。
图3中的(b)为本申请实施例提供的一种DMRS Type 2的示意图。DMRS的频域资源在一个符号的频域每两个RE连接在一起，相互间隔4个RE，密度为33.3％。type 2对应三个CDM组，例如CDM组0、CDM组1和CDM组2。每个CDM组内的不同DMRS端口对应的DMRS序列也是通过OCC码实现正交。type 1中每个DMRS端口占用频域资源密度更高，信道估计性能更好。type 2支持的正交的DMRS端口数更多，可以支持更多层数据的传输。每个DMRS端口用一个端口号进行标识。DMRS序列所占用的时频资源位置由端口号和配置类型(type 1或type 2)决定。配置类型通过高层信令无线资源控制(radio resource control，RRC)参数指示给终端设备，端口号通过下行控制信息(downlink control information，DCI)中的天线端口(antenna ports)字段指示给终端设备。
网络设备与终端设备之间传输数据的信道的多径环境引起的信号多径衰落。各路径长度不同使得信号到达时间不同，发送端发送一个脉冲信号，则接收端接收到的接收信号中不仅含有该脉冲信号，还包含有它的各个时延信号。这种由于多径效应使接收信号脉冲宽度扩展的现象称为时延扩展。对于数字信号传输多径时延的极限是一个数字信号周期，否则，波形展宽将会造成数字信号的码间干扰。
本申请实施例提供了一种发送DMRS的方法，网络设备首先根据当前调度的所有终端设备的信道信息灵活地确定DMRS端口的扩展方式；然后给每个终端设备配置DMRS端口的扩展方式，以及指示DMRS序列的生成方式，使终端设备通过经过扩展的CDM组的DMRS端口接收DMRS或发送DMRS。该方法通过灵活地选择每个CDM组的DMRS端口的扩展方式，使得在不同场景下确保DMRS端口正交扩展，进而实现鲁棒的信道估计和数据解调。该方法中的信道信息可以是时延扩展，也可以是其他信道信息，不申请不做限定。为便于描述，以下以信道的时延扩展为例进行说明。
下面将结合附图对本申请实施例的实施方式进行详细描述。
图4是本申请的实施例应用的移动通信系统的架构示意图。如图3所示，该移动通信系统400包括核心网设备410、网络设备420、网络设备430、终端设备440和终端设备450。终端设备通过无线的方式与网络设备相连，网络设备通过无线或有线方式与核心网设备连接。核心网设备与网络设备可以是独立的不同的物理设备，也可以是将核心网设备的功能与网络设备的逻辑功能集成在同一个物理设备上，还可以是一个物理设备上集成了部分核心网设备的功能和部分的网络设备的功能。终端设备可以 是固定位置的，也可以是可移动的。图4只是示意图，该通信系统中还可以包括其它网络设备，如还可以包括无线中继设备和无线回传设备，在图4中未画出。本申请的实施例对该移动通信系统中包括的核心网设备、网络设备和终端设备的数量不做限定。
网络设备是终端设备通过无线方式接入到该移动通信系统中的接入设备，可以是基站(base station)、演进型基站(evolved NodeB，eNodeB)、发送接收点(transmission reception point，TRP)、5G移动通信系统中的下一代基站(next generation NodeB，gNB)、未来移动通信系统中的基站或WiFi系统中的接入节点等；也可以是完成基站部分功能的模块或单元，例如，可以是集中式单元(central unit，CU)，也可以是分布式单元(distributed unit，DU)。本申请的实施例对网络设备所采用的具体技术和具体设备形态不做限定。网络设备还可以称为无线接入网设备，如果无特殊说明，网络设备均指无线接入网设备。如网络设备420可以称为无线接入网设备420。网络设备430可以称为无线接入网设备430。
终端设备也可以称为终端、用户设备(user equipment，UE)、移动台、移动终端等。终端设备可以是手机、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实终端设备、增强现实终端设备、工业控制中的无线终端、无人驾驶中的无线终端、远程手术中的无线终端、智能电网中的无线终端、运输安全中的无线终端、智慧城市中的无线终端、智慧家庭中的无线终端等等。本申请的实施例对终端设备所采用的具体技术和具体设备形态不做限定。
该移动通信系统400包括的多个终端设备可以向网络设备发送上行数据，终端设备发送的上行数据可由其中一个网络设备接收，也可以由两个网络设备联合接收。网络设备也可以向多个终端设备发送下行数据。
本申请实施例可以包括5G新空口(new radio，NR)系统在内的多种通信系统，只要该通信系统中存在实体需要发送传输方向指示信息，另一个实体需要接收该指示信息，并根据该指示信息确定一定时间内的传输方向。
网络设备和终端设备可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上；还可以部署在空中的飞机、气球和人造卫星上。本申请的实施例对网络设备和终端设备的应用场景不做限定。
网络设备和终端设备之间可以通过授权频谱(licensed spectrum)进行通信，也可以通过免授权频谱(unlicensed spectrum)进行通信，也可以同时通过授权频谱和免授权频谱进行通信。网络设备和终端设备之间可以通过6千兆赫(gigahertz，GHz)以下的频谱进行通信，也可以通过6GHz以上的频谱进行通信，还可以同时使用6GHz以下的频谱和6GHz以上的频谱进行通信。本申请的实施例对网络设备和终端设备之间所使用的频谱资源不做限定。
在本申请的各实施例中，时域符号可以是正交频分复用(orthogonal frequency division multiplexing，OFDM符号)，也可以是单载波频分复用(single carrier-frequency division multiplexing，SC-FDM)符号。如果没有特别说明，本申请实施例中的符号均指时域符号。
可以理解的是，本申请的实施例中，物理上行共享信道(physical uplink shared channel，PUSCH)和PDSCH只是作为上行和下行数据信道的一种举例，在不同的系 统和不同的场景中，数据信道可能有不同的名称，本申请的实施例对此并不做限定。
接下来，图5为本申请实施例提供的一种解调参考信号的发送接收方法流程图。这里以终端设备440向网络设备430发送上行数据为例，对发送解调参考信号的过程进行说明。如图5所示，该方法可以包括以下步骤。
步骤510、网络设备420向终端设备440发送指示信息。
网络设备420可以根据当前调度的所有终端设备(如：终端设备440)的上行信道(如：PUSCH)的时延扩展确定DMRS端口的扩展方式。
1.配置类型1(type 1)DMRS端口扩展
在一种可能的方式中，在当前调度的所有终端设备的上行信道的时延扩展均小于第一阈值时，两个CDM组的DMRS端口扩展倍数相同。可理解的，该扩展方式用于指示对两个CDM组进行DMRS端口均匀扩展。例如，两个CDM组的DMRS端口均扩展2倍。
在另一种可能的方式中，在当前调度的所有终端设备中存在某些终端设备的上行信道的时延扩展大于或等于第一阈值时，两个CDM组采用不同的DMRS端口扩展倍数。可理解的，该扩展方式用于指示对两个CDM组进行DMRS端口非均匀扩展。例如，第一CDM组的DMRS端口扩展3倍，第二CDM组的DMRS端口扩展1倍，即不扩展。
2.配置类型2(type 2)DMRS端口扩展
在一种可能的方式中，在当前调度的所有终端设备的上行信道的时延扩展均小于第一阈值时，三个CDM组的DMRS端口扩展倍数相同。可理解的，该扩展方式用于指示对三个CDM组进行DMRS端口均匀扩展。例如，三个CDM组的DMRS端口均扩展2倍。
在另一种可能的方式中，在当前调度的所有终端设备中存在一部分终端设备的上行信道的时延扩展大于或等于第一阈值且小于第二阈值，且其他所有终端设备的上行信道的时延扩展大于或等于第二阈值时，三个CDM组采用不同的DMRS端口扩展倍数。可理解的，第一阈值小于第二阈值，该扩展方式用于指示对三个CDM组进行DMRS端口非均匀扩展。例如，第三CDM组的DMRS端口扩展3倍，第四CDM组的DMRS端口扩展2倍，第五CDM组的DMRS端口扩展1倍，即不扩展。比如，当前调度的所有终端设备包括终端设备1、终端设备2和终端设备3。终端设备1的上行信道的时延扩展大于或等于第一阈值且小于第二阈值，终端设备2的上行信道的时延扩展大于或等于第二阈值和终端设备3的上行信道的时延扩展大于或等于第二阈值。三个CDM组包括CDM组0、CDM组1和CDM组2。CDM组0的DMRS端口扩展3倍、CDM组1的DMRS端口扩展2倍，CDM组2的DMRS端口扩展1倍。
在另一种可能的方式中，在当前调度的所有终端设备中存在一部分终端设备的上行信道的时延扩展大于或等于第二阈值，且其他所有终端设备的上行信道的时延扩展均小于第一阈值时，三个CDM组采用不同的DMRS端口扩展倍数。可理解的，第一阈值小于第二阈值，该扩展方式用于指示对三个CDM组进行DMRS端口非均匀扩展。例如，第三CDM组采用4倍DMRS端口扩展，第四CDM组和第五CDM组均采用1倍DMRS端口扩展，即不扩展。比如，当前调度的所有终端设备包括终端设备1、终 端设备2和终端设备3。终端设备1的上行信道的时延扩展大于或等于第二阈值，终端设备2的上行信道的时延扩展小于第一阈值和终端设备3的上行信道的时延扩展小于第一阈值。三个CDM组包括CDM组0、CDM组1和CDM组2。CDM组0的DMRS端口扩展4倍、CDM组1的DMRS端口扩展1倍，CDM组2的DMRS端口扩展1倍。
关于两种配置类型的DMRS端口的扩展方式如下图6至图10示例说明。
需要说明的是，对CDM组的DMRS端口进行扩展可以理解为对CDM组的DMRS端口的数量进行扩展。
由于未进行DMRS端口扩展的CDM组中的DMRS端口在时延域间隔较远，即使该DMRS端口分配给信道时延扩展大的终端设备，也能一定程度上保证DMRS端口的正交性。此外，进行DMRS端口扩展的CDM组中的DMRS端口在时延域间隔较近，需要分配给信道时延扩展小的终端设备才能一定程度上保证DMRS端口的正交性。因此，网络设备可以将未进行DMRS端口扩展的CDM组中的DMRS端口优先分配给时延扩展大的终端设备，将进行DMRS端口扩展后的CDM组中的DMRS端口分配给时延扩展小的终端设备。
例如，CDM组0的DMRS端口包括传统DMRS端口和扩展DMRS端口，CDM组1的DMRS端口包括传统DMRS端口，不包括扩展DMRS端口。信道时延扩展小的终端设备0优先使用CDM组0的DMRS端口，信道时延扩展大的终端设备1优先使用CDM组1的DMRS端口。
如此，网络设备针对不同时延扩展的终端设备分配扩展倍数不同的CDM组中的DMRS端口，既能保证当前调度的所有终端设备的时延扩展均较小时扩展后DMRS端口的正交性，也能保证部分终端设备的时延扩展较大时扩展后DMRS端口的正交性。
指示信息用于指示一个DMRS的配置类型对应的CDM组中至少一个CDM组的DMRS端口的扩展方式。指示信息可以包括第一信息或第二信息。第一信息用于指示DMRS的配置类型对应的全部CDM组的DMRS端口进行扩展。第二信息用于指示DMRS的配置类型对应的CDM组中部分CDM组的DMRS端口进行扩展。例如，第一信息包括DMRS的配置类型对应的全部CDM组的DMRS端口扩展倍数相同。第二信息包括DMRS的配置类型对应的全部CDM组中部分CDM组的DMRS端口扩展倍数。第二信息可以指示不同的扩展倍数，不同的扩展倍数可以指示不同的扩展方式。
在一些实施例中，网络设备420通过控制信令为终端设备配置指示信息，指示DMRS的配置类型对应的CDM组中至少一个CDM组的DMRS端口的扩展方式。
示例一，网络设备420可以向不同的终端设备发送下行控制信息(downlink control information，DCI)为终端设备配置CDM组的DMRS端口的扩展方式。DCI可以包括指示终端设备接收DMRS序列的DMRS端口的指示信息。
例如，type 1包括两种DMRS端口的扩展方式，即均匀扩展方式和非均匀扩展方式，则可以通过DCI中的1个比特位指示CDM组的DMRS端口的扩展方式。如，该比特位的取值为0，表示type 1对应的全部CDM组的DMRS端口扩展倍数相同；该比特位的取值为1，表示type 1对应的全部CDM组中部分CDM组的DMRS端口进行扩展。
又如，type 2包括三种DMRS端口的扩展方式，即均匀扩展方式、非均匀扩展1和非均匀扩展2，则可以通过DCI中的2个比特位指示CDM组的DMRS端口的扩展方式。如，该比特位的取值为00，表示type 2对应的全部CDM组的DMRS端口扩展倍数相同；该比特位的取值为01，表示type 2对应的全部CDM组中两个CDM组的DMRS端口进行扩展；该比特位的取值为10，表示type 2对应的全部CDM组中一个CDM组的DMRS端口进行扩展。
示例二，网络设备420还可以向不同的终端设备发送无线资源控制(radio resource control，RRC)信令为终端设备配置CDM组的DMRS端口的扩展方式。RRC信令可以包括指示终端设备接收DMRS序列的DMRS端口的指示信息。
在另一些实施例中，网络设备420还可以通过广播向不同的终端设备发送指示信息。
上述发送指示信息的方式是一些示意性说明，本申请实施例对发送指示信息的方式不予限定。
步骤520、终端设备440接收网络设备420发送的指示信息。
步骤530、终端设备440经过扩展的至少一个CDM组的DMRS端口发送DMRS。
终端设备440先确定发送DMRS的时频资源位置、DMRS端口和发送上行数据的时频资源的位置。进而，通过指示信息指示的CDM组的DMRS端口，在DMRS的时频资源的位置发送DMRS，以及基于RB中DMRS占用的时频资源以外的时频资源发送上行数据。
终端设备440可以根据DMRS的映射类型和DMRS的时域位置确定发送DMRS的时域资源的位置。终端设备440可以根据DMRS的配置类型确定发送DMRS的频域资源的位置。
例如，终端设备440可以通过查表或RRC信令中的参数获取DMRS的映射类型、DMRS的时域资源位置和DMRS的配置类型。DMRS的映射类型包括映射类型A和映射类型B。DMRS的配置类型包括配置类型1和配置类型2。关于DMRS的映射类型和DMRS的配置类型的相关解释可以参考上述步骤510的阐述。
终端设备440可以根据网络设备420发送的指示信息确定至少一个CDM组的DMRS端口的扩展方式，进而终端设备440经过扩展的至少一个CDM组的DMRS端口发送DMRS。至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口。传统DMRS端口可以是3GPP TS 38.211 V16.7.0规定的端口。扩展DMRS端口可以是根据指示信息指示的扩展方式经过扩展的DMRS端口。
例如，指示信息包括第一信息，终端设备440确定对DMRS的配置类型对应的全部CDM组的DMRS端口进行扩展，即DMRS的配置类型对应的全部CDM组的DMRS端口扩展倍数相同。
又如，指示信息包括第二信息，终端设备440确定对DMRS的配置类型对应的CDM组中部分CDM组的DMRS端口进行扩展，即对DMRS的配置类型对应的全部CDM组中部分CDM组的DMRS端口进行扩展。具体地，终端设备440可以根据第二信息确定不同的非均匀扩展方式，如对type1对应的两个CDM组中一个CDM组的DMRS端口进行扩展，另一个CDM组的DMRS端口不扩展；对type 2对应的三个CDM 组中两个CDM组的DMRS端口进行扩展，另一个CDM组的DMRS端口不扩展；或对type 2对应的三个CDM组中一个CDM组的DMRS端口进行扩展，另两个CDM组的DMRS端口不扩展。
步骤540、网络设备420经过扩展的至少一个CDM组的DMRS端口接收终端设备440发送的DMRS。
由于终端设备440发送DMRS和上行数据的时频资源是由网络设备420配置的，则网络设备420在为终端设备440配置的时频资源上接收DMRS和上行数据，且通过经过扩展的至少一个CDM组的DMRS端口接收DMRS。例如，经过扩展的CDM组的DMRS端口包括DMRS端口0至DMRS端口3，终端设备440通过DMRS端口0至DMRS端口3发送DMRS，网络设备420通过DMRS端口0至DMRS端口3接收DMRS，利用DMRS估计上行等效信道和对上行数据进行解调。关于估计上行等效信道和对上行数据进行解调可以参考3GPP TS 38.211 V16.7.0规定等相关技术，不予赘述。
由于对CDM组的DMRS进行扩展后，终端设备和网络设备可以传输更多的数据层数，从而，既可以提高单个终端设备发送数据的速率，也可以增加系统内与网络设备进行上行数据传输的终端设备的数量，从而有效地提升了系统容量。
可选地，上述实施例是以终端设备440向网络设备430发送上行数据为例说明解调参考信号的发送接收过程。网络设备430向终端设备440发送下行数据时，也可以根据下行信道(如：PDSCH)的时延扩展确定DMRS端口的扩展方式，向终端设备440发送指示信息，指示对CDM组的DMRS端口进行扩展的扩展方式，网络设备420通过经过扩展的CDM组的DMRS端口发送DMRS，以便于终端设备440通过经过扩展的CDM组的DMRS端口接收DMRS。关于根据下行信道(如：PDSCH)的时延扩展确定DMRS端口的扩展方式可以参考上述步骤510中关于上行信道(如：PUSCH)的时延扩展确定DMRS端口的扩展方式的阐述。
需要说明的是，上行数据/下行数据可以是上下行的业务数据，也可以是上下行信令的数据，本申请实施例不予限定。
下面以DMRS的映射类型为映射类型A为例，对CDM组的DMRS端口的扩展方式举例说明。假设type 1对应的两个CDM组包括CDM组0和CDM组1。假设type 2对应的两个CDM组包括CDM组0、CDM组1和CDM组2。
1.配置类型1(type 1)DMRS端口扩展
方式一，若待调度的终端设备的信道的时延扩展小于第一阈值，type 1对应的两个CDM组的DMRS端口扩展2倍。
示例地，图6为本申请实施例提供的一种type 1的DMRS端口的扩展方式。
如图6中的(a)所示，DMRS占用单符号。对CDM组0和CDM组1均进行DMRS端口扩展后，CDM组0映射的2个DMRS端口扩展到4个DMRS端口，如DMRS端口0、DMRS端口1、DMRS端口2和DMRS端口3，CDM组1映射的2个DMRS端口扩展到4个DMRS端口，如DMRS端口4、DMRS端口5、DMRS端口6和DMRS端口7。
如图6中的(b)所示，DMRS占用双符号。对CDM组0和CDM组1均进行DMRS 端口扩展后，CDM组0映射的4个DMRS端口扩展到8个DMRS端口，如DMRS端口0至DMRS端口7，CDM组1映射的4个DMRS端口扩展到8个DMRS端口，如DMRS端口8至DMRS端口15。
方式二，若待调度的终端设备中部分终端设备的信道的时延扩展大于或等于第一阈值，type 1对应的两个CDM组中，一个CDM组的DMRS端口扩展3倍，一个CDM组的DMRS端口不扩展。
示例地，图7为本申请实施例提供的一种type 1的DMRS端口的扩展方式。
如图7中的(a)所示，DMRS占用单符号。对CDM组0的DMRS端口进行3倍扩展后，CDM组0映射的2个DMRS端口扩展到6个DMRS端口，如DMRS端口0至DMRS端口5，CDM组1的DMRS端口未扩展，CDM组1映射到2个DMRS端口，如DMRS端口6和DMRS端口7。
如图7中的(b)所示，DMRS占用双符号。对CDM组0的DMRS端口进行3倍扩展后，CDM组0映射的4个DMRS端口扩展到12个DMRS端口，如DMRS端口0至DMRS端口11，CDM组1的DMRS端口未扩展，CDM组1映射到4个DMRS端口，如DMRS端口12至DMRS端口15。
2.配置类型2(type 2)DMRS端口扩展
方式一，若待调度的终端设备的信道的时延扩展小于第一阈值，type 2对应的三个CDM组的DMRS端口扩展2倍。
示例地，图8为本申请实施例提供的一种type 2的DMRS端口的扩展方式。
如图8中的(a)所示，DMRS占用单符号。对CDM组0、CDM组1和CDM组2均进行DMRS端口扩展后，CDM组0映射的2个DMRS端口扩展到4个DMRS端口，如DMRS端口0至DMRS端口3，CDM组1映射的2个DMRS端口扩展到4个DMRS端口，如DMRS端口4至DMRS端口7，CDM组2映射的2个DMRS端口扩展到4个DMRS端口，如DMRS端口8至DMRS端口11。
如图8中的(b)所示，DMRS占用双符号。对CDM组0、CDM组1和CDM组2均进行DMRS端口扩展后，CDM组0映射的4个DMRS端口扩展到8个DMRS端口，如DMRS端口0至DMRS端口7，CDM组1映射的4个DMRS端口扩展到8个DMRS端口，如DMRS端口8至DMRS端口15，CDM组2映射的4个DMRS端口扩展到8个DMRS端口，如DMRS端口16至DMRS端口23。
方式二，若待调度的终端设备中第一部分终端设备的信道的时延扩展大于或等于第一阈值且小于第二阈值，且第二部分终端设备的信道的时延扩展大于或等于第二阈值，type 2对应的三个CDM组中，一个CDM组的DMRS端口扩展3倍，一个CDM组的DMRS端口扩展2倍，一个CDM组的DMRS端口不扩展。
示例地，图9为本申请实施例提供的一种type 2的DMRS端口的扩展方式。
如图9中的(a)所示，DMRS占用单符号。对CDM组0的DMRS端口进行3倍扩展后，CDM组0映射的2个DMRS端口扩展到6个DMRS端口，如DMRS端口0至DMRS端口5，对CDM组1的DMRS端口进行2倍扩展后，CDM组1映射的2个DMRS端口扩展到4个DMRS端口，如DMRS端口6至DMRS端口9，CDM组2的DMRS端口未扩展，CDM组2映射到2个DMRS端口，如DMRS端口10和DMRS 端口11。
如图9中的(b)所示，DMRS占用双符号。对CDM组0的DMRS端口进行3倍扩展后，CDM组0映射的4个DMRS端口扩展到12个DMRS端口，如DMRS端口0至DMRS端口11，对CDM组1的DMRS端口进行2倍扩展后，CDM组1映射的4个DMRS端口扩展到8个DMRS端口，如DMRS端口12至DMRS端口19，CDM组2的DMRS端口未扩展，CDM组2映射到4个DMRS端口，如DMRS端口20至DMRS端口23。
方式三，若待调度的终端设备中第一部分终端设备的信道的时延扩展大于或等于第二阈值，且其他所有终端设备的信道的时延扩展均小于第一阈值，type 2对应的三个CDM组中，一个CDM组的DMRS端口扩展4倍，两个CDM组的DMRS端口不扩展。
示例地，图10为本申请实施例提供的一种type 2的DMRS端口的扩展方式。
如图10中的(a)所示，DMRS占用单符号。对CDM组0的DMRS端口进行4倍扩展后，CDM组0映射的2个DMRS端口扩展到8个DMRS端口，如DMRS端口0至DMRS端口7，CDM组1的DMRS端口未扩展，CDM组1映射到2个DMRS端口，如DMRS端口8和DMRS端口9，CDM组2的DMRS端口未扩展，CDM组2映射到2个DMRS端口，如DMRS端口10和DMRS端口11。
如图10中的(b)所示，DMRS占用双符号。对CDM组0的DMRS端口进行4倍扩展后，CDM组0映射的4个DMRS端口扩展到16个DMRS端口，如DMRS端口0至DMRS端口15，CDM组1的DMRS端口未扩展，CDM组1映射到4个DMRS端口，如DMRS端口16和DMRS端口19，CDM组2的DMRS端口未扩展，CDM组2映射到4个DMRS端口，如DMRS端口20至DMRS端口23。
上述实施例是对基于终端设备的信道信息确定CDM组中至少一个CDM组的DMRS端口的扩展方式进行的说明。在网络设备或终端设备确定了DMRS的时频资源位置和DMRS端口，发送DMRS前生成DMRS序列，即占用CDM组对应的RE发送的DMRS信号。
本申请实施例还提供了一种DMRS序列生成方法，该DMRS序列生成方法用于生成经过扩展的CDM组的DMRS端口发送的DMRS。基于未经过扩展的CDM组的DMRS端口传输发送的DMRS可以采用传统(如：3GPP TS 38.211 V16.7.0规定)的生成方法。例如，采用公式(1)生成经过扩展的CDM组的DMRS端口传输(如：发送或接收)的上行DMRS序列。
其中，公式(1)中的参数wf(k′)和wt(l′)，可以参考3GPP TS 38.211 V16.7.0规定的表格6.4.1.1.3-1至6.4.1.1.3-2查询得到。
例如，采用公式(2)生成经过扩展的CDM组的DMRS端口传输(如：发送或接收)的下行DMRS序列。
其中，公式(2)中的参数wf(k′)和wt(l′)，可以参考3GPP TS 38.211 V16.7.0规定的表格7.4.1.1.2-1至7.4.1.1.2-2查询得到。
相比于NR系统中的传统上行DMRS序列生成公式多了以及在type 1和type 2时的计算方式。M用于指示CDM组中至少一个CDM组的DMRS端口的扩展方式。m表示DMRS端口的时延域偏移。网络设备根据当前调度的所有终端设备的信道的时延扩展确定M的取值，M的取值可以指示第一信息或第二信息。m的取值与DMRS端口的索引有关，不同的DMRS端口的索引对应不同的m的取值。
网络设备和终端设备可以预先配置M、m和m/M的取值的意义，终端设备获取到M或m或m/M的取值后，可以根据配置的规则确定CDM组的DMRS端口的扩展方式。
在第一种可能的实现方式中，网络设备将M的取值和m的取值分别指示给终端设备。
1.配置类型1(type 1)DMRS端口扩展
M＝4，表示type 1对应的两个CDM组的DMRS端口扩展2倍。
M＝6，表示type 1对应的两个CDM组中，一个CDM组的DMRS端口扩展3倍，一个CDM组的DMRS端口不扩展。
M的取值可以通过广播指示给终端设备；也可以通过RRC信令分别指示给每个终端设备，如直接指示M的取值，或者设计一个参数来指示是否使能非均匀扩展，若使能，则表示M＝6，若不使能，则M＝4；也可以通过DCI中1个比特位指示给每个终端设备，如比特位的取值为0，表示M＝4，比特位的取值为1，表示M＝6。
在一些实施例中，m的取值与M的取值以及DMRS端口索引有关。为了节省指示开销，m的取值与DMRS端口的索引绑定进行联合指示，不同的DMRS端口对应不同的m的取值。
例如，如表1所示，M＝4，type 1的DMRS参数表中增加m的取值。其中，表1中索引0至索引7为传统DMRS端口，m的取值均为0；索引8至索引15为新增的扩展DMRS端口，m的取值均为1。CDM组0的DMRS端口和CDM组1的DMRS端口均扩展2倍。
表1
又如，如表2所示，M＝6，type 1的DMRS参数表中增加m的取值。其中，表2中索引0至索引7为传统DMRS端口，m的取值均为0；索引8至索引15为新增的扩展DMRS端口，其中索引8,9,12,13的DMRS端口对应的m的取值均为1，其中索引10,11,14,15的DMRS端口对应的m的取值均为2。CDM组0的DMRS端口扩展3倍，CDM组1的DMRS端口不扩展。
表2
需要说明的是，表2中新增DMRS端口8至DMRS端口15中哪些DMRS端口的m的取值是1或2不予限定。
2.配置类型2(type 2)DMRS端口扩展
M＝2，表示type 2对应的三个CDM组的DMRS端口均扩展2倍。
M＝3，表示type 2对应的三个CDM组中，一个CDM组的DMRS端口扩展3倍，一个CDM组的DMRS端口扩展2倍，一个CDM组的DMRS端口不扩展。
M＝4，表示type 2对应的三个CDM组中，一个CDM组的DMRS端口扩展4倍，两个CDM组的DMRS端口不扩展。
M的取值可以通过广播指示给终端设备；也可以通过RRC信令分别指示给每个终端设备，如直接指示M的取值，或者设计一个状态参数来指示三种扩展方式；也可以 通过DCI中2个比特位指示给每个终端设备，如2个比特位的取值为00，表示M＝2，2个比特位的取值为01，表示M＝3，2个比特位的取值为10，表示M＝4。
在一些实施例中，m的取值与M的取值以及DMRS端口索引有关。为了节省指示开销，m的取值与DMRS端口的索引绑定进行联合指示，不同的DMRS端口对应的m的取值。
例如，如表3所示，M＝2，type 2的DMRS参数表中增加m的取值。其中，表3中索引0至索引11为传统DMRS端口，m的取值均为0；索引12至索引23为新增的扩展DMRS端口，m的取值均为1。CDM组0的DMRS端口、CDM组1的DMRS端口和CDM组2的DMRS端口均扩展2倍。
表3
又如，如表4所示，M＝3，type 2的DMRS参数表中增加m的取值。其中，表4中索引0至索引11为传统DMRS端口，m的取值均为0；索引12至索引23为新增的扩展DMRS端口，m的取值为1或1.5或2。CDM组0的DMRS端口扩展3倍，CDM组0的DMRS端口扩展2倍，CDM组2的DMRS端口不扩展。
表4
需要说明的是，表4中新增DMRS端口12至DMRS端口23中哪些DMRS端口的m的取值是1或1.5或2不予限定。
又如，如表5所示，M＝4，type 2的DMRS参数表中增加m的取值。其中，表5中索引0至索引11为传统DMRS端口，m的取值均为0；索引12至索引23为新增的扩展DMRS端口，m的取值为1或2或3。CDM组0的DMRS端口扩展4倍，CDM组1的DMRS端口和CDM组2的DMRS端口不扩展。
表5
需要说明的是，表5中新增DMRS端口12至DMRS端口23中哪些DMRS端口的m的取值是1或2或3不予限定。
如此，终端设备获取到网络设备指示的M，根据M的取值可以确定DMRS的配置类型对应的CDM组中至少一个CDM组的DMRS端口的扩展方式，并根据DMRS端口的索引确定m的取值，将M的取值和m的取值代入公式(1)，便可以生成DMRS序列。根据该DMRS序列生成方式可以确定CDM组的DMRS端口的扩展方式，以及确定基于扩展后DMRS端口发送的DMRS序列。
在第二种可能的实现方式中，网络设备将m/M的取值指示给终端设备。m/M的取值与M的取值以及DMRS端口的索引有关。为了节省指示开销，m/M的取值与DMRS端口的索引绑定进行联合指示。
1.配置类型1(type 1)DMRS端口扩展
例如，如表6所示，M＝4，type 1的DMRS参数表中增加m/M的取值。其中，表6中索引0至索引7为传统DMRS端口，m/M的取值均为0；索引8至索引15为新增的扩展DMRS端口，m/M的取值均为1/4。CDM组0的DMRS端口和CDM组1的DMRS端口均扩展2倍。
表6
又如，如表7所示，M＝6，type 1的DMRS参数表中增加m/M的取值。其中，表7中索引0至索引7为传统DMRS端口，m/M的取值均为0；索引8至索引15为新增的扩展DMRS端口，新增的扩展DMRS端口中一半DMRS端口m/M的值为1/6，即索引8,9,12,13的DMRS端口的m的取值均为1/6，新增的扩展DMRS端口中另一半DMRS端口m/M的值为1/3，即索引10,11,14,15的DMRS端口的m的取值均为1/3。CDM组0的DMRS端口扩展3倍，CDM组1的DMRS端口不扩展。
表7
需要说明的是，表7中新增DMRS端口8至DMRS端口15中哪些DMRS端口的m的取值是1/6或1/3不予限定。
综上，若m/M的取值包括0和1/4，表示type 1对应的两个CDM组的DMRS端口均匀扩展。所有传统DMRS端口的m/M的取值均为0，所有扩展DMRS端口的m/M的取值均为1/4。
若m/M的取值包括0、1/3和1/6，表示type 1对应的两个CDM组的DMRS端口非均匀扩展。所有传统DMRS端口的m/M的取值均为0，扩展DMRS端口中一半DMRS端口的m/M的取值均为1/3，一半DMRS端口的m/M的取值均为1/6。
2.配置类型2(type 2)DMRS端口扩展
例如，如表8所示，M＝2，type 2的DMRS参数表中增加m/M的取值。其中，表8中索引0至索引11为传统DMRS端口，m/M的取值均为0；索引12至索引23为新增的扩展DMRS端口，m/M的取值均为1/2。CDM组0、CDM组1和CDM组2的DMRS端口均扩展2倍。
表8
又如，如表9所示，M＝3，type 2的DMRS参数表中增加m/M的取值。其中，表9中索引0至索引11为传统DMRS端口，m/M的取值均为0；索引12至索引23为新增的扩展DMRS端口中，索引14,15,20,21的DMRS端口对应的m/M的取值均为1/2，索引12,13,18,19的DMRS端口对应的m/M的取值均为1/3，索引16,17,22,23的DMRS端口对应的m/M的取值均为2/3。CDM组0的DMRS端口扩展3倍，CDM组1的DMRS端口扩展2倍，CDM组2的DMRS端口不扩展。
表9
需要说明的是，表9中新增DMRS端口12至DMRS端口23中哪些DMRS端口的m的取值是1/3或1/2或2/3不予限定。
又如，如表10所示，M＝4，type 2的DMRS参数表中增加m/M的取值。其中，表10中索引0至索引11为传统DMRS端口，m/M的取值均为0；索引12至索引23为新增的扩展DMRS端口中，索引16,17,22,23的DMRS端口对应的m/M的取值均为1/2，索引12,13,18,19的DMRS端口对应的m/M的取值均为1/4，索引14,15,20,21的DMRS端口对应的m/M的取值均为3/4。CDM组0的DMRS端口扩展4倍，CDM组1的DMRS端口和CDM组2的DMRS端口均不扩展。
表10
需要说明的是，表10中新增DMRS端口12至DMRS端口23中哪些DMRS端口的m的取值是1/4或3/4或1/2不予限定。
综上，若m/M的取值包括0和1/2，表示type 2对应的三个CDM组的DMRS端口均匀扩展。所有传统DMRS端口的m/M的取值均为0，所有扩展DMRS端口的m/M的取值均为1/2。
若m/M的取值包括0、1/2、1/3和2/3，表示type 2对应的三个CDM组的DMRS端口非均匀扩展。所有传统DMRS端口的m/M的取值均为0，扩展DMRS端口中四个DMRS端口的m/M的取值均为1/2，四个DMRS端口的m/M的取值均为1/3，四个DMRS端口的m/M的取值均为2/3。
若m/M的取值包括0、1/2、1/4和3/4，表示type 2指示的三个CDM组的DMRS端口非均匀扩展。所有传统DMRS端口m/M的取值均为0，扩展DMRS端口中四个DMRS端口m/M的取值均为1/2，四个DMRS端口m/M的取值均为1/4，四个DMRS端口m/M的取值均为3/4。
如此，终端设备获取到网络设备指示的M和m/M，根据M的取值可以确定DMRS的配置类型对应的CDM组中至少一个CDM组的DMRS端口的扩展方式，并根据DMRS端口的索引确定m/M的取值，将m/M的取值代入公式(1)，便可以生成DMRS序列。根据该DMRS序列生成方式可以确定CDM组的DMRS端口的扩展方式，以及确定基于扩展后DMRS端口发送的DMRS序列。
在第三种可能的实现方式中，由于是一个周期性序列，网络设备和终端设备可以预配置该序列在一个周期内的多种取值，然后网络设备向终端设备指示选择哪 种取值。
若DMRS的配置类型为type 1，且对type 1指示的全部CDM组进行DMRS端口扩展，扩展DMRS端口m/M的值均为1/4，因此中一个周期内(从0到3)的取值是[1,j,-1,-j]。
若对type 1指示的CDM组中部分CDM组进行DMRS端口扩展，M的值为6，部分扩展DMRS端口m的值为1，因此中一个周期内(从0到5)的取值是[1，ejπ/3,ej2π/3,ejπ,ej4π/3,ej5π/3]；部分扩展DMRS端口m的值为2,因此中一个周期内(从0到2)的取值是[1，ej2π/3,ej4π/3]。可以通过DCI指示是两种取值中的一种。
若DMRS的配置类型为type 2，且对type 2指示的全部CDM组进行DMRS端口扩展，扩展DMRS端口m/M的值均为1/2,因此中一个周期内(从0到1)的取值是[1,-1]。
若对type 2指示的三个CDM组中两个CDM组的DMRS端口进行扩展，另一个CDM组的DMRS端口不扩展，扩展DMRS端口中四个端口m/M的值为1/2，因此中一个周期内(从0到1)的取值是[1,-1]；四个端口m/M的值为1/3，因此中一个周期内(从0到2)的取值是[1,ej2π/3,ej4π/3]；四个端口m/M的值均为2/3，因此中一个周期内(从0到2)的取值是[1,ej4π/3,ej8π/3]。可以通过DCI指示是三种取值中的一种。
若对type 2指示的三个CDM组中一个CDM组的DMRS端口进行扩展，另两个CDM组的DMRS端口不扩展，扩展DMRS端口中四个端口m/M的值为1/4，因此中一个周期内(从0到3)的取值是[1,j,-1,-j]；四个端口m/M的值为1/2，因此中一个周期内(从0到1)的取值是[1,-1]；四个端口m/M的值为3/4，因此中一个周期内(从0到3)的取值是[1,ej3π/2,ej3π,ej9π/2]。可以通过DCI指示是三种取值中的一种。
如此，终端设备获取到网络设备指示的将的取值代入公式(1)，便可以生成DMRS序列。根据该DMRS序列生成方式可以确定CDM组的DMRS端口的扩展方式，以及确定基于扩展后DMRS端口发送的DMRS序列。
可以理解的是，为了实现上述实施例中的功能，网络设备和终端设备包括了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本申请中所公开的实施例描述的各示例的单元及方法步骤，本申请能够以硬件或硬件和计算机软件相结合的形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用场景和设计约束条件。
上文中结合图1至图10，详细描述了根据本实施例所提供的解调参考信号的发送接收方法，下面将结合图11，描述根据本实施例所提供的通信装置。
图11为本实施例提供的可能的通信装置的结构示意图。这些通信装置可以用于实现上述方法实施例中终端设备或网络设备的功能，因此也能实现上述方法实施例所具备的有益效果。在本申请的实施例中，该通信装置可以是如图4所示的终端设备440，也可以是如图4所示的网络设备420，还可以是应用于终端设备或网络设备的模块(如芯片)。
如图11所示，通信装置1100包括处理单元1110和收发单元1120。通信装置1100 用于实现上述图5中所示的方法实施例中终端设备440或网络设备420的功能。
当通信装置1100用于实现图4所示的方法实施例中终端设备发送上行数据的功能时：
收发单元1120，用于接收指示信息，所述指示信息用于指示一个DMRS的配置类型对应的多个CDM组中至少一个CDM组的DMRS端口的扩展方式。例如，收发单元1120用于执行图5中步骤520。
收发单元1120，用于通过经过扩展的至少一个CDM组的DMRS端口发送DMRS，所述至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口。例如，收发单元1120用于执行图5中步骤530。
处理单元1110用于根据指示信息确定DMRS的配置类型对应的CDM组中至少一个CDM组的DMRS端口的扩展方式，以及生成DMRS序列。
当通信装置1100用于实现图4所示的方法实施例中网络设备接收上行数据的功能时：
收发单元1120，用于发送指示信息，所述指示信息用于指示一个DMRS的配置类型对应的多个CDM组中至少一个CDM组的DMRS端口的扩展方式。例如，收发单元1120用于执行图5中步骤510。
收发单元1120，用于通过经过扩展的至少一个CDM组的DMRS端口接收DMRS，所述至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口，所述DMRS用于解调上行数据。例如，收发单元1120用于执行图5中步骤540。
处理单元1110用于确定DMRS的配置类型对应的CDM组中至少一个CDM组的DMRS端口的扩展方式，以及生成DMRS序列。
当通信装置1100用于实现方法实施例中终端设备接收下行数据的功能时：
收发单元1120，用于接收指示信息，所述指示信息用于指示一个DMRS的配置类型对应的多个CDM组中至少一个CDM组的DMRS端口的扩展方式。
收发单元1120，用于通过经过扩展的至少一个CDM组的DMRS端口接收DMRS，所述至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口，所述DMRS用于解调下行数据。
处理单元1110用于根据指示信息确定DMRS的配置类型对应的CDM组中至少一个CDM组的DMRS端口的扩展方式，以及生成DMRS序列。
当通信装置1100用于实现方法实施例中网络设备发送下行数据的功能时：
收发单元1120，用于发送指示信息，所述指示信息用于指示一个DMRS的配置类型对应的多个CDM组中至少一个CDM组的DMRS端口的扩展方式。
收发单元1120，用于通过经过扩展的至少一个CDM组的DMRS端口发送DMRS，所述至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口。
处理单元1110用于确定DMRS的配置类型对应的CDM组中至少一个CDM组的DMRS端口的扩展方式，以及生成DMRS序列。
根据本申请实施例的通信装置1100可对应于执行本申请实施例中描述的方法，并且通信装置1100中的各个单元的上述和其它操作和/或功能分别为了实现图5中的各个方法的相应流程，为了简洁，在此不再赘述。
如图12所示，通信装置1200包括处理器1210和接口电路1220。处理器1210和接口电路1220之间相互耦合。可以理解的是，接口电路1220可以为收发器或输入输出接口。可选的，通信装置1200还可以包括存储器1230，用于存储处理器1210执行的指令或存储处理器1210运行指令所需要的输入数据或存储处理器1210运行指令后产生的数据。
当通信装置1200用于实现图5所示的方法时，处理器1210用于执行上述处理单元1110的功能，接口电路1220用于执行上述收发单元1120的功能。
当上述通信装置为应用于终端设备的芯片时，该终端设备芯片实现上述方法实施例中终端设备的功能。该终端设备芯片从终端设备中的其它模块(如射频模块或天线)接收信息，该信息是网络设备发送给终端设备的；或者，该终端设备芯片向终端设备中的其它模块(如射频模块或天线)发送信息，该信息是终端设备发送给网络设备的。
当上述通信装置为应用于网络设备的芯片时，该网络设备芯片实现上述方法实施例中网络设备的功能。该网络设备芯片从网络设备中的其它模块(如射频模块或天线)接收信息，该信息是终端设备发送给网络设备的；或者，该网络设备芯片向网络设备中的其它模块(如射频模块或天线)发送信息，该信息是网络设备发送给终端设备的。
可以理解的是，本申请的实施例中的处理器可以是中央处理单元(Central Processing Unit，CPU)，还可以是其它通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现场可编程门阵列(Field Programmable Gate Array，FPGA)或者其它可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。通用处理器可以是微处理器，也可以是任何常规的处理器。
本申请的实施例中的方法步骤可以通过硬件的方式来实现，也可以由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器(Random Access Memory，RAM)、闪存、只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)、寄存器、硬盘、移动硬盘、CD-ROM或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于网络设备或终端设备中。当然，处理器和存储介质也可以作为分立组件存在于网络设备或终端设备中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机程序或指令。在计算机上加载和执行所述计算机程序或指令时，全部或部分地执行本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、网络设备、用户设备或者其它可编程装置。所述计算机程序或指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机程序或指令可以从一个 网站站点、计算机、服务器或数据中心通过有线或无线方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是集成一个或多个可用介质的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，例如，软盘、硬盘、磁带；也可以是光介质，例如，数字视频光盘(digital video disc，DVD)；还可以是半导体介质，例如，固态硬盘(solid state drive，SSD)。
在本申请的各个实施例中，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。
本申请中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A,B可以是单数或者复数。在本申请的文字描述中，字符“/”，一般表示前后关联对象是一种“或”的关系；在本申请的公式中，字符“/”，表示前后关联对象是一种“相除”的关系。
本申请说明书和权利要求书及上述附图中的术语“第一”、“第二”和“第三”等是用于区别不同对象，而不是用于限定特定顺序。
在本申请实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
可以理解的是，在本申请的实施例中涉及的各种数字编号仅为描述方便进行的区分，并不用来限制本申请的实施例的范围。上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (20)

  1. 一种发送解调参考信号DMRS的方法，其特征在于，包括：
    接收指示信息，所述指示信息用于指示一个DMRS的配置类型对应的多个码分复用CDM组中至少一个CDM组的DMRS端口的扩展方式；
    通过经过扩展的所述至少一个CDM组的DMRS端口发送DMRS，所述至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口，所述DMRS用于解调上行数据。
  2. 一种接收解调参考信号DMRS的方法，其特征在于，包括：
    发送指示信息，所述指示信息用于指示一个DMRS的配置类型对应的多个码分复用CDM组中至少一个CDM组的DMRS端口的扩展方式；
    通过经过扩展的所述至少一个CDM组的DMRS端口接收DMRS，所述至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口，所述DMRS用于解调上行数据。
  3. 一种接收解调参考信号DMRS的方法，其特征在于，包括：
    接收指示信息，所述指示信息用于指示一个DMRS的配置类型对应的多个码分复用CDM组中至少一个CDM组的DMRS端口的扩展方式；
    通过经过扩展的所述至少一个CDM组的DMRS端口接收DMRS，所述至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口，所述DMRS用于解调下行数据。
  4. 一种发送解调参考信号DMRS的方法，其特征在于，包括：
    发送指示信息，所述指示信息用于指示一个DMRS的配置类型对应的多个码分复用CDM组中至少一个CDM组的DMRS端口的扩展方式；
    通过经过扩展的所述至少一个CDM组的DMRS端口发送DMRS，所述至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口，所述DMRS用于解调下行数据。
  5. 根据权利要求1-4中任一项所述的方法，其特征在于，
    在待调度的终端设备的信道的时延扩展均小于第一阈值时，所述扩展方式用于指示对所述DMRS的配置类型对应的全部CDM组进行DMRS端口扩展，所述信道包括上行信道和下行信道；或者，
    在所述待调度的终端设备中部分终端设备的所述信道的时延扩展大于或等于所述第一阈值时，所述扩展方式用于指示所述DMRS的配置类型对应的多个CDM组中部分CDM组进行DMRS端口扩展。
  6. 根据权利要求5所述的方法，其特征在于，所述DMRS的配置类型包括第一配置类型；
    在所述待调度的终端设备的所述信道的时延扩展均小于所述第一阈值时，所述第一配置类型对应的两个CDM组中每个CDM组的DMRS端口扩展2倍；或者，
    在所述待调度的终端设备中部分终端设备的所述信道的时延扩展大于或等于所述第一阈值时，所述第一配置类型对应的第一CDM组和第二CDM组中，所述第一CDM组的DMRS端口扩展3倍，所述第二CDM组的DMRS端口不扩展。
  7. 根据权利要求5或6所述的方法，其特征在于，所述DMRS的配置类型还包括第二配置类型；
    在所述待调度的终端设备的所述信道的时延扩展均小于所述第一阈值时，所述第二配置类型对应的三个CDM中每个CDM组的DMRS端口扩展2倍；或者，
    在所述待调度的终端设备中第一部分终端设备的所述信道的时延扩展大于或等于所述第一阈值且小于第二阈值，且第二部分终端设备的信道的时延扩展大于或等于所述第二阈值时，所述第二配置类型对应的第三CDM组、第四CDM组和第五CDM组中，所述第三CDM组的DMRS端口扩展3倍，所述第四CDM组的DMRS端口扩展2倍，所述第五CDM组的DMRS端口不扩展；所述第一阈值小于所述第二阈值；或者，
    在所述待调度的终端设备中第一部分终端设备的所述信道的时延扩展大于或等于所述第二阈值，且第二部分终端设备的信道的时延扩展均小于第一阈值时，所述第二配置类型对应的所述第三CDM组、第四CDM组和第五CDM组中，所述第三CDM组的DMRS端口扩展4倍，所述第四CDM组和所述第五CDM组的DMRS端口均不扩展，所述第一阈值小于所述第二阈值。
  8. 根据权利要求1-7中任一项所述的方法，其特征在于，
    所述指示信息用于指示系数中M的取值和m的取值；或者，
    所述指示信息用于指示系数中m/M的取值；或者，
    所述指示信息用于指示系数的取值。
  9. 根据权利要求1-8中任一项所述的方法，其特征在于，
    所述指示信息是预先定义的；或者，
    所述指示信息通过控制信令配置的，所述控制信令包括无线资源控制RRC信令、媒体接入控制控制元素MAC-CE和下行控制信息DCI中的至少一种。
  10. 一种通信装置，其特征在于，包括：
    收发单元，用于接收指示信息，所述指示信息用于指示一个DMRS的配置类型对应的多个码分复用CDM组中至少一个CDM组的DMRS端口的扩展方式；
    所述收发单元，用于通过经过扩展的所述至少一个CDM组的DMRS端口发送DMRS，所述至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口，所述DMRS用于解调上行数据。
  11. 一种通信装置，其特征在于，包括：
    收发单元，用于发送指示信息，所述指示信息用于指示一个DMRS的配置类型对应的多个码分复用CDM组中至少一个CDM组的DMRS端口的扩展方式；
    所述收发单元，用于通过经过扩展的所述至少一个CDM组的DMRS端口接收DMRS，所述至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口，所述DMRS用于解调上行数据。
  12. 一种通信装置，其特征在于，包括：
    收发单元，用于接收指示信息，所述指示信息用于指示一个DMRS的配置类型对应的多个码分复用CDM组中至少一个CDM组的DMRS端口的扩展方式；
    所述收发单元，用于通过经过扩展的所述至少一个CDM组的DMRS端口接收 DMRS，所述至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口，所述DMRS用于解调下行数据。
  13. 一种通信装置，其特征在于，包括：
    收发单元，用于发送指示信息，所述指示信息用于指示一个DMRS的配置类型对应的多个码分复用CDM组中至少一个CDM组的DMRS端口的扩展方式；
    所述收发单元，用于通过经过扩展的所述至少一个CDM组的DMRS端口发送DMRS，所述至少一个CDM组的DMRS端口包括传统DMRS端口和扩展DMRS端口，所述DMRS用于解调下行数据。
  14. 根据权利要求10-13中任一项所述的装置，其特征在于，
    在待调度的终端设备的信道的时延扩展均小于第一阈值时，所述扩展方式用于指示对所述DMRS的配置类型对应的全部CDM组进行DMRS端口扩展，所述信道包括上行信道和下行信道；或者，
    在所述待调度的终端设备中部分终端设备的所述信道的时延扩展大于或等于所述第一阈值时，所述扩展方式用于指示所述DMRS的配置类型对应的多个CDM组中部分CDM组进行DMRS端口扩展。
  15. 根据权利要求14所述的装置，其特征在于，所述DMRS的配置类型包括第一配置类型；
    在所述待调度的终端设备的所述信道的时延扩展均小于所述第一阈值时，所述第一配置类型对应的两个CDM组中每个CDM组的DMRS端口扩展2倍；或者，
    在所述待调度的终端设备中部分终端设备的所述信道的时延扩展大于或等于所述第一阈值时，所述第一配置类型对应的第一CDM组和第二CDM组中，所述第一CDM组的DMRS端口扩展3倍，所述第二CDM组的DMRS端口不扩展。
  16. 根据权利要求14或15所述的装置，其特征在于，所述DMRS的配置类型还包括第二配置类型；
    在所述待调度的终端设备的所述信道的时延扩展均小于所述第一阈值时，所述第二配置类型对应的三个CDM中每个CDM组的DMRS端口扩展2倍；或者，
    在所述待调度的终端设备中第一部分终端设备的所述信道的时延扩展大于或等于所述第一阈值且小于第二阈值，且第二部分终端设备的信道的时延扩展大于或等于所述第二阈值时，所述第二配置类型对应的第三CDM组、第四CDM组和第五CDM组中，所述第三CDM组的DMRS端口扩展3倍，所述第四CDM组的DMRS端口扩展2倍，所述第五CDM组的DMRS端口不扩展；所述第一阈值小于所述第二阈值；或者，
    在所述待调度的终端设备中第一部分终端设备的所述信道的时延扩展大于或等于所述第二阈值，且第二部分终端设备的信道的时延扩展均小于第一阈值时，所述第二配置类型对应的所述第三CDM组、第四CDM组和第五CDM组中，所述第三CDM组的DMRS端口扩展4倍，所述第四CDM组和所述第五CDM组的DMRS端口均不扩展，所述第一阈值小于所述第二阈值。
  17. 根据权利要求10-16中任一项所述的装置，其特征在于，
    所述指示信息用于指示系数中M的取值和m的取值；或者，
    所述指示信息用于指示系数中m/M的取值；或者，
    所述指示信息用于指示系数的取值。
  18. 根据权利要求10-17中任一项所述的装置，其特征在于，
    所述指示信息是预先定义的；或者，
    所述指示信息通过控制信令配置的，所述控制信令包括无线资源控制RRC信令、媒体接入控制控制元素MAC-CE和下行控制信息DCI中的至少一种。
  19. 一种通信装置，其特征在于，包括处理器和接口电路，所述接口电路用于接收来自所述通信装置之外的其它通信装置的信号并传输至所述处理器，或所述接口电路用于将来自所述处理器的信号发送给所述通信装置之外的其它通信装置，所述处理器通过逻辑电路或执行代码指令用于实现如权利要求1至9中任一项所述的方法。
  20. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序或指令，当所述计算机程序或指令被通信装置执行时，实现如权利要求1至9中任一项所述的方法。
PCT/CN2023/089248 2022-04-29 2023-04-19 发送解调参考信号的方法及装置 Ceased WO2023207712A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP23795145.4A EP4507356A4 (en) 2022-04-29 2023-04-19 METHOD AND APPARATUS FOR SENDING DEMODULATION REFERENCE SIGNAL
US18/928,807 US20250096976A1 (en) 2022-04-29 2024-10-28 Demodulation reference signal sending method and apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210469096.0A CN117014888A (zh) 2022-04-29 2022-04-29 发送解调参考信号的方法及装置
CN202210469096.0 2022-04-29

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/928,807 Continuation US20250096976A1 (en) 2022-04-29 2024-10-28 Demodulation reference signal sending method and apparatus

Publications (1)

Publication Number Publication Date
WO2023207712A1 true WO2023207712A1 (zh) 2023-11-02

Family

ID=88517711

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/089248 Ceased WO2023207712A1 (zh) 2022-04-29 2023-04-19 发送解调参考信号的方法及装置

Country Status (4)

Country Link
US (1) US20250096976A1 (zh)
EP (1) EP4507356A4 (zh)
CN (1) CN117014888A (zh)
WO (1) WO2023207712A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4586534A4 (en) * 2022-09-30 2026-01-21 Huawei Tech Co Ltd METHOD AND APPARATUS FOR INDICATING REFERENCE SIGNAL WEAR

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN121751354A (zh) * 2024-09-25 2026-03-27 维沃移动通信有限公司 无线通信方法、装置及设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111769918A (zh) * 2019-03-30 2020-10-13 华为技术有限公司 Dmrs端口的指示方法及装置
CN111786757A (zh) * 2019-04-04 2020-10-16 电信科学技术研究院有限公司 Dmrs端口的传输配置指示方法、相关装置及存储介质
CN112134661A (zh) * 2019-06-24 2020-12-25 华为技术有限公司 一种通信方法及装置
WO2021047759A1 (en) * 2019-09-10 2021-03-18 Huawei Technologies Co., Ltd. Network access node and client device for adaptive dmrs patterns

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12224966B2 (en) * 2019-01-10 2025-02-11 Telefonaktiebolaget Lm Ericsson (Publ) Code-division multiplexing (CDM) groups for multi-source transmission
CN114079555B (zh) * 2020-08-14 2025-06-17 华为技术有限公司 信号传输方法和装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111769918A (zh) * 2019-03-30 2020-10-13 华为技术有限公司 Dmrs端口的指示方法及装置
CN111786757A (zh) * 2019-04-04 2020-10-16 电信科学技术研究院有限公司 Dmrs端口的传输配置指示方法、相关装置及存储介质
CN112134661A (zh) * 2019-06-24 2020-12-25 华为技术有限公司 一种通信方法及装置
WO2021047759A1 (en) * 2019-09-10 2021-03-18 Huawei Technologies Co., Ltd. Network access node and client device for adaptive dmrs patterns

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CATT: "PDSCH/PUSCH enhancements for up to 71GHz operation", 3GPP TSG RAN WG1 #106BIS-E R1-2109212, 1 October 2021 (2021-10-01), XP052058169 *
See also references of EP4507356A4

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4586534A4 (en) * 2022-09-30 2026-01-21 Huawei Tech Co Ltd METHOD AND APPARATUS FOR INDICATING REFERENCE SIGNAL WEAR

Also Published As

Publication number Publication date
EP4507356A4 (en) 2025-08-27
CN117014888A (zh) 2023-11-07
US20250096976A1 (en) 2025-03-20
EP4507356A1 (en) 2025-02-12

Similar Documents

Publication Publication Date Title
CN110536450B (zh) 一种数据传输方法、装置、传输接收节点、终端及介质
CN109391413B (zh) 信息传输的方法和通信装置
CN109076526B (zh) 一种数据传输方法、网络侧设备及终端设备
JP7203948B2 (ja) 通信装置、通信方法、及び集積回路
CN114142980B (zh) 参考信号的传输方法及装置
CN111049628B (zh) 数据传输方法和通信装置
CN112218375B (zh) 确定资源分配的方法和装置
AU2018440564A1 (en) Method for transmitting configuration information and terminal device
CN110890947A (zh) 通信方法及装置
US20250096976A1 (en) Demodulation reference signal sending method and apparatus
CN108811074A (zh) 信息传输方法及装置
AU2018246761A1 (en) System and method for demodulation reference signal overhead reduction
CN116032441A (zh) 信息传输方法及装置
CN108847918B (zh) 控制信道的资源配置方法、基站和终端设备
CN116349368B (zh) 参考信号的传输资源的确定方法及装置
CN108282294B (zh) 一种参考信号传输方法及装置
KR101784625B1 (ko) 비직교 다중접속 기반 공간 편이 변조 및 다중입력 다중출력 멀티플렉싱 방법 및 장치
WO2024032261A1 (zh) 序列生成方法及通信装置
WO2022205022A1 (zh) 用于传输参考信号的方法和装置
CN112153690B (zh) 通信方法和通信装置
CN113630879B (zh) 数据的重复传输方法
CN117918060A (zh) 用于在通信系统中发送和接收信号的方法和装置
US10797775B2 (en) Backhaul transmission method for wireless communication, controller, base station, and gateway
WO2026067277A1 (zh) 数据传输方法及装置
WO2025152749A1 (zh) 一种通信方法及相关设备

Legal Events

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

Ref document number: 23795145

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2023795145

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2023795145

Country of ref document: EP

Effective date: 20241108

NENP Non-entry into the national phase

Ref country code: DE