WO2023125761A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2023125761A1
WO2023125761A1 PCT/CN2022/143215 CN2022143215W WO2023125761A1 WO 2023125761 A1 WO2023125761 A1 WO 2023125761A1 CN 2022143215 W CN2022143215 W CN 2022143215W WO 2023125761 A1 WO2023125761 A1 WO 2023125761A1
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WIPO (PCT)
Prior art keywords
time
port
frequency resource
frequency
reference signal
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PCT/CN2022/143215
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English (en)
French (fr)
Inventor
董昶钊
高翔
刘鹍鹏
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华为技术有限公司
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Publication of WO2023125761A1 publication Critical patent/WO2023125761A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • 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

Definitions

  • the present application relates to the technical field of communication, and in particular to a communication method and device.
  • Demodulation reference signal can be used to estimate data channel (such as physical downlink shared channel (physical downlink shared channel, PDSCH)) or control channel (such as physical downlink control channel (physical downlink control channel, PDCCH))
  • data channel such as physical downlink shared channel (physical downlink shared channel, PDSCH)
  • control channel such as physical downlink control channel (physical downlink control channel, PDCCH)
  • the equivalent channel matrix is used for data detection and demodulation.
  • a DMRS port corresponds to a spatial layer, and each spatial layer corresponds to a data stream.
  • MIMO multiple input and multiple output
  • new radio (new radio, NR) supports two types of DMRS resource mapping, namely Type 1 (Type 1) DMRS and Type 2 (Type 2) DMRS.
  • Type 1 (Type 1) DMRS resource mapping type it can support up to 8 orthogonal DMRS ports;
  • Type 2 (Type 2) DMRS resource mapping type it can support up to 12 orthogonal DMRS ports. Therefore, currently NR can only support MIMO transmission of 12 streams at most.
  • the present application provides a communication method and device, which are used to improve the mapping mode between ports and time-frequency resources, so as to increase the number of transmission streams.
  • the present application provides a communication method.
  • the method can be executed by a terminal device or a chip in the terminal device.
  • the terminal device can receive indication information, the indication information is used to indicate that the port belongs to the first port set or the second port set, and the first port set corresponds to N first time-frequency resource group, the second port set corresponds to M second time-frequency resource groups; the time-frequency resources corresponding to the N first time-frequency resource groups do not overlap, and the time-frequency resources corresponding to the M second time-frequency resource groups No overlap; the time-frequency resources occupied by at least one second time-frequency resource group are a subset of the time-frequency resources occupied by the first time-frequency resource group; the terminal device can also determine the port index corresponding to the reference signal according to the indication information.
  • the terminal device can determine the port index corresponding to the reference signal according to the indication information, where the indication information can indicate the ports in the first port set or the second port set, and the time-frequency resources occupied by at least one second time-frequency resource group It is a subset of the time-frequency resources occupied by the first time-frequency resource group, so the second port set can support more ports than the first port set, so this method can realize port expansion and increase the number of transmission streams .
  • the number of time-frequency resources occupied by the N first time-frequency resource groups and the M second time-frequency resource groups is the same.
  • the at least one first time-frequency resource group and the at least two second time-frequency resource groups occupy the same time-frequency resources.
  • the number of time-frequency resources occupied by at least one first time-frequency resource group is twice the number of time-frequency resources occupied by one second time-frequency resource group.
  • the N first time-frequency resource groups and the M second time-frequency resource groups occupy the same time unit.
  • port expansion can be implemented more flexibly and conveniently.
  • the subcarriers occupied by at least one second time-frequency resource group in one frequency domain unit are a subset of one first time-frequency resource group.
  • the time-frequency resources in the M second time-frequency resource groups are distributed at equal intervals.
  • port expansion can be implemented more flexibly and conveniently.
  • the ports in the second port set correspond to the comb teeth 4 ; or, the ports in the second port set correspond to the comb teeth 6 .
  • port expansion can be implemented more flexibly and conveniently.
  • the first port set corresponds to 2 CDM groups, and the second port set corresponds to 3 or 4 CDM groups; or, the first port set corresponds to 3 CDM groups, The second port set corresponds to 4, 5 or 6 CDM groups.
  • the first set of ports corresponds to a first reference signal sequence
  • the first reference signal sequence Elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • n 0,1,...
  • k is an integer greater than 0, l' is 0 or 1, ⁇ is a non-zero complex number, w(k'), w(l') are frequency domain and time domain masks, r(2n+k') Map the elements on the kth subcarrier and the lth symbol for the base sequence r.
  • the second set of ports corresponds to a second reference signal sequence
  • the second reference signal sequence Elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • n 0,1,...
  • k is an integer greater than 0, l' is 0 or 1, ⁇ is a non-zero complex number, w(k'), w(l') are frequency domain and time domain masks, r(2n+k') Map the elements on the kth subcarrier and the lth symbol for the base sequence r.
  • the second set of ports corresponds to a second reference signal sequence
  • the second reference signal sequence Elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • n 0,1,...
  • k is an integer greater than 0, l' is 0 or 1, ⁇ is a non-zero complex number, w(k'), w(l') are frequency domain and time domain masks, r(n) is the base sequence r maps elements on the kth subcarrier and the lth symbol.
  • the second set of ports corresponds to a second reference signal sequence
  • the second reference signal sequence Elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • n 0,1,...
  • k is an integer greater than 0, l' is 0 or 1, ⁇ is a non-zero complex number, w(k'), w(l') are frequency domain and time domain masks respectively, c is 1 or 2, indicating Referring to the combing capability of the signal port, r(2n+k′) is the element mapped to the kth subcarrier and the lth symbol of the base sequence r.
  • the second set of ports corresponds to a second reference signal sequence
  • the second reference signal sequence Elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • n 0,1,...
  • k is an integer greater than 0, l' is 0 or 1, ⁇ is a non-zero complex number, w(k'), w(l') are frequency domain and time domain masks respectively, c is 1 or 2, indicating The combing capability of the reference signal port, r(n) is the element mapped to the kth subcarrier and the lth symbol of the base sequence r.
  • the network device can flexibly choose to use the first port set or the second port set described in this application according to the total number of reference signal ports currently scheduled, that is, indicate the selected port set through the indication information. port.
  • the current reference signal configuration is type1 single symbol
  • the maximum number of supported ports is 4
  • the total number of reference signal ports currently scheduled by the network device is 6, and the ports in the second port set can be selected correspondingly.
  • the present application provides a communication method.
  • the method can be executed by a network device or a chip in the network device.
  • the network device is, for example, a radio access network device such as a base station.
  • the method may include: the network device sends indication information, the indication information is used to indicate that the port belongs to the first port set or the second port set, and the first port set corresponds to N first time-frequency resources group, the second port set corresponds to M second time-frequency resource groups; the time-frequency resources corresponding to the N first time-frequency resource groups do not overlap, and the time-frequency resources corresponding to the M second time-frequency resource groups do not overlap; the number of time-frequency resources occupied by the N first time-frequency resource groups and the M second time-frequency resource groups is the same; the time-frequency resource occupied by at least one second time-frequency resource group is a first time-frequency resource A subset of time-frequency resources occupied by a resource group.
  • the number of time-frequency resources occupied by the N first time-frequency resource groups and the M second time-frequency resource groups is the same.
  • the at least one first time-frequency resource group and the at least two second time-frequency resource groups occupy the same time-frequency resources.
  • the number of time-frequency resources occupied by at least one first time-frequency resource group is twice the number of time-frequency resources occupied by one second time-frequency resource group.
  • the N first time-frequency resource groups and the M second time-frequency resource groups occupy the same time unit.
  • the subcarriers occupied by at least one second time-frequency resource group in one frequency domain unit are a subset of one first time-frequency resource group.
  • the time-frequency resources in the M second time-frequency resource groups are distributed at equal intervals.
  • the ports in the second port set correspond to the comb teeth 4 ; or, the ports in the second port set correspond to the comb teeth 6 .
  • the first port set corresponds to 2 CDM groups, and the second port set corresponds to 3 or 4 CDM groups; or, the first port set corresponds to 3 CDM groups, The second port set corresponds to 4, 5 or 6 CDM groups.
  • the first set of ports corresponds to a first reference signal sequence
  • the first reference signal sequence Elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • n 0,1,...
  • k is an integer greater than 0, l' is 0 or 1, ⁇ is a non-zero complex number, w(k'), w(l') are frequency domain and time domain masks, r(2n+k') Map the elements on the kth subcarrier and the lth symbol for the base sequence r.
  • the second set of ports corresponds to a second reference signal sequence
  • the second reference signal sequence Elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • n 0,1,...
  • k is an integer greater than 0, l' is 0 or 1, ⁇ is a non-zero complex number, w(k'), w(l') are frequency domain and time domain masks, r(2n+k') Map the elements on the kth subcarrier and the lth symbol for the base sequence r.
  • the second set of ports corresponds to a second reference signal sequence
  • the second reference signal sequence Elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • n 0,1,...
  • k is an integer greater than 0, l' is 0 or 1, ⁇ is a non-zero complex number, w(k'), w(l') are frequency domain and time domain masks, r(n) is the base sequence r maps elements on the kth subcarrier and the lth symbol.
  • the second set of ports corresponds to a second reference signal sequence
  • the second reference signal sequence Elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • n 0,1,...
  • k is an integer greater than 0, l' is 0 or 1, ⁇ is a non-zero complex number, w(k'), w(l') are frequency domain and time domain masks respectively, c is 1 or 2, indicating Referring to the combing capability of the signal port, r(2n+k′) is the element mapped to the kth subcarrier and the lth symbol of the base sequence r.
  • the second set of ports corresponds to a second reference signal sequence
  • the second reference signal sequence Elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • n 0,1,...
  • k is an integer greater than 0, l' is 0 or 1, ⁇ is a non-zero complex number, w(k'), w(l') are frequency domain and time domain masks respectively, c is 1 or 2, indicating The combing capability of the reference signal port, r(n) is the element mapped to the kth subcarrier and the lth symbol of the base sequence r.
  • the network device can flexibly choose to use the first port set or the second port set described in this application according to the total number of reference signal ports currently scheduled, that is, indicate the selected port set through the indication information. port.
  • the current reference signal configuration is type1 single symbol
  • the maximum number of supported ports is 4
  • the total number of reference signal ports currently scheduled by the network device is 6, and the ports in the second port set can be selected correspondingly.
  • the present application provides a communication device.
  • the communication device may be used to implement the functions involved in the first aspect or any possible design of the first aspect. This function can be realized by hardware, or by executing corresponding software by hardware, and the hardware or software includes one or more modules corresponding to the functions or method steps or operations in the above first aspect and any design thereof.
  • the communication device may be a terminal device or a chip in the terminal device.
  • the communication device may include a communication module (or a communication unit) and a processing module (or a processing unit).
  • the communication module can be used for the communication device to communicate
  • the processing module can be used for the communication device to realize the processing function of the communication device.
  • the communication module can be used to receive indication information, the indication information is used to indicate that the port belongs to the first port set or the second port set, the first port set corresponds to N first time-frequency resource groups, and the second port set corresponds to M first time-frequency resource groups The second time-frequency resource group; the time-frequency resources corresponding to the N first time-frequency resource groups do not overlap, and the time-frequency resources corresponding to the M second time-frequency resource groups do not overlap; at least one second time-frequency resource The time-frequency resources occupied by the group are a subset of the time-frequency resources occupied by the first time-frequency resource group; the processing module may be configured to determine the port index corresponding to the reference signal according to the indication information.
  • the meanings of the first port set, the second port set, the first time-frequency resource group, and the second time-frequency resource group please refer to the first aspect, the second aspect, or any possible implementation thereof. Describe accordingly.
  • the present application provides a communication device.
  • the communication device may be used to implement the functions involved in the second aspect or any possible design of the second aspect. This function may be realized by hardware, or by executing corresponding software by hardware, and the hardware or software may include one or more modules corresponding to the functions or method steps or operations in the above second aspect and any design thereof.
  • the communication device may be a network device or a chip in the network device.
  • the communication device may include a communication module (or a communication unit) and a processing module (or a processing unit).
  • the communication module can be used for the communication device to communicate, and the processing module can be used for the communication device to realize the processing function of the communication device.
  • the processing module can be used to determine the indication information, the indication information is used for the port belongs to the first port set or the second port set, the first port set corresponds to the N first time-frequency resource groups, and the second port set corresponds to the M first time-frequency resource groups Two time-frequency resource groups; the time-frequency resources corresponding to the N first time-frequency resource groups do not overlap, and the time-frequency resources corresponding to the M second time-frequency resource groups do not overlap; the N first time-frequency resource groups do not overlap
  • the number of time-frequency resources occupied by the resource group is the same as that of the M second time-frequency resource groups; the time-frequency resources occupied by at least one second time-frequency resource group are a subset of the time-frequency resources occupied by a first time-frequency resource group ;
  • the communication module can be used to send instruction information.
  • the meanings of the first port set, the second port set, the first time-frequency resource group, and the second time-frequency resource group please refer to the first aspect, the second aspect, or any possible implementation thereof. Describe accordingly.
  • the present application provides a communication system.
  • the communication system may include a communication device for realizing the first aspect or any possible design of the first aspect, and a communication device for realizing the second aspect or any possible design of the second aspect communication device.
  • the communication system may include the communication device described in the third aspect and/or the communication device described in the fourth aspect.
  • the present application provides a computer storage medium, including program instructions.
  • the program instructions When the program instructions are run on a computer, the computer executes any possible design of the above-mentioned first aspect or the first aspect, or the above-mentioned second aspect. A method in any possible design of the aspect or the second aspect.
  • the embodiment of the present application provides a computer program product, which, when running on a computer, enables the computer to execute any possible design of the above-mentioned first aspect or the first aspect, or the above-mentioned second aspect or the second aspect Any one of the possible design methods.
  • the embodiment of the present application provides a chip system
  • the chip system may include a processor, and may also include a memory (or the system chip is coupled with the memory), and the chip system executes the program instructions in the memory to execute
  • “coupling” means that two components are directly or indirectly combined with each other, for example, coupling may refer to an electrical connection between two components.
  • FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a DMRS resource mapping pattern
  • FIG. 3 is a logical schematic diagram of a relationship between a reference signal sequence and a resource block provided in an embodiment of the present application
  • FIG. 4 is a schematic flow diagram of a DMRS sending method
  • FIG. 5 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a DMRS resource mapping pattern provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of another DMRS resource mapping pattern provided by the embodiment of the present application.
  • FIG. 8 is a schematic diagram of another DMRS resource mapping pattern provided by the embodiment of the present application.
  • FIG. 9 is a schematic diagram of another DMRS resource mapping pattern provided by the embodiment of the present application.
  • FIG. 10 is a schematic flowchart of another communication method provided by the embodiment of the present application.
  • FIG. 11 is a schematic flowchart of another communication method provided by the embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • the wireless communication systems mentioned in the embodiments of the present application include but are not limited to: global system of mobile communication (GSM) system, code division multiple access (code division multiple access, CDMA) system, wideband code division multiple access (wideband code division multiple access (WCDMA) system, general packet radio service (General Packet Radio Service, GPRS), long term evolution (long term evolution, LTE) system, advanced long term evolution (LTE-advanced, LTE-A) system, LTE frequency Frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunications system (UMTS), worldwide interoperability for microwave access (WiMAX) ) communication system, 5G, a fusion system of multiple access systems, or an evolution system, and the three major application scenarios of 5G mobile communication system enhanced mobile broadband (eMBB), ultra-reliable and low-latency communication (ultra reliable and low -latency communication, URLLC) and enhanced machine type communication (eMTC) or new communication systems that will appear in the future
  • the network device involved in the embodiment of the present application can be any device with wireless transceiver function or a chip that can be set on the device, including but not limited to: evolved node B (evolved node B, eNB), wireless network Controller (radio network controller, RNC), node B (node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolution node B (home evolved NodeB), or home node B (home node B, HNB)), base band unit (base band unit, BBU), wireless fidelity (wireless fidelity, WIFI) system access point (access point, AP ), wireless relay node, wireless backhaul node, transmission point (transmission point, TP) or sending and receiving point (transmission and reception point, TRP/TP) or remote radio head (remote radio head, RRH), etc., can also be 5G, such as gNB in NR system, or, transmission point
  • a gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include an active antenna unit (AAU).
  • the CU implements some functions of the gNB, and the DU implements some functions of the gNB.
  • the CU is responsible for processing non-real-time protocols and services, and realizing the functions of radio resource control (radio resource control, RRC) and packet data convergence protocol (packet data convergence protocol, PDCP) layer.
  • the DU is responsible for processing physical layer protocols and real-time services, realizing the functions of the radio link control (radio link control, RLC) layer, media access control (media access control, MAC) layer and physical (physical, PHY) layer.
  • the AAU implements some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by the DU , or, sent by DU+AAU.
  • the network device may be a device including one or more of a CU node, a DU node, and an AAU node.
  • the CU can be divided into network devices in an access network (radio access network, RAN), and the CU can also be divided into network devices in a core network (core network, CN), which is not limited in this application.
  • a network device may serve as a scheduling device.
  • the network device may include, but is not limited to, an LTE base station eNB, an NR base station gNB, an operator, etc., and its functions may include, for example, configuring uplink and downlink resources,
  • DCI downlink control information
  • the network device may also serve as a sending device.
  • the network device may include but not limited to: TRP and RRH, and its functions may include, for example, sending downlink signals and receiving uplink signals.
  • the terminal equipment involved in the embodiments of the present application may also be referred to as user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, Terminal, wireless communication device, user agent or user device.
  • user equipment user equipment
  • UE user equipment
  • access terminal subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, Terminal, wireless communication device, user agent or user device.
  • the terminal device in the embodiment of the present application may be a mobile phone, a tablet computer (pad), a computer with a wireless transceiver function, a wearable device, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality) , AR) terminal equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid , wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc.
  • the embodiments of the present application do not limit the application scenarios.
  • the aforementioned terminal equipment and the chips that can be installed in the aforementioned terminal equipment are collectively referred to as terminal equipment.
  • the functions of the terminal device may include, but not limited to, for example: receiving downlink/sidelink signals, and/or sending uplink/sidelink signals.
  • This application takes the physical downlink control channel PDCCH as an example to describe the downlink control channel, takes the physical downlink shared channel PDSCH as an example to describe the downlink data channel, and takes the carrier as an example to describe the frequency domain unit , taking a time slot as an example to describe the time unit in the 5G system, the time slot involved in this application may also be a transmission time interval TTI and/or a time unit and/or a subframe and/or a mini-slot.
  • FIG. 1 is a schematic diagram of a communication system for transmitting information using the present application.
  • the communication system 100 includes a network device 102 that may include a plurality of antennas such as antennas 104 , 106 , 108 , 110 , 112 and 114 .
  • the network device 102 may additionally include a transmitter chain and a receiver chain, and those of ordinary skill in the art may understand that they may include multiple components related to signal transmission and reception (such as processors, modulators, multiplexers, etc.) , demodulator, demultiplexer or antenna, etc.).
  • Network device 102 may communicate with a plurality of end devices (eg, end device 116 and end device 122 ). However, it is understood that network device 102 may communicate with any number of end devices similar to end devices 116 or 122 .
  • Terminal devices 116 and 122 may be, for example, cellular phones, smart phones, portable computers, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable devices for communicating over wireless communication system 100. equipment.
  • terminal device 116 communicates with antennas 112 and 114 , which transmit information to terminal device 116 via forward link 118 and receive information from terminal device 116 via reverse link 120 .
  • terminal device 122 is in communication with antennas 104 and 106 , wherein antennas 104 and 106 transmit information to terminal device 122 via forward link 124 and receive information from terminal device 122 via reverse link 126 .
  • forward link 118 may use a different frequency band than reverse link 120 and forward link 124 may use a different frequency band than reverse link 126, for example.
  • forward link 118 and reverse link 120 may use a common frequency band
  • forward link 124 and reverse link 126 may use a common frequency band
  • Each antenna (or group of antennas) and/or area designed for communication is referred to as a sector of network device 102 .
  • antenna groups may be designed to communicate with terminal devices in sectors of the coverage area of network device 102 .
  • the transmit antennas of network device 102 may utilize beamforming to improve the signal-to-noise ratio of forward links 118 and 124.
  • the network device 102 uses beamforming to transmit signals to randomly dispersed terminal devices 116 and 122 in the relevant coverage area, compared to the way in which the network device transmits signals to all its terminal devices through a single antenna, the Mobile devices experience less interference.
  • the network device 102, the terminal device 116, or the terminal device 122 may be a wireless communication sending device and/or a wireless communication receiving device.
  • the wireless communication transmitting device may encode the data for transmission.
  • a wireless communication sending device may obtain (eg, generate, receive from another communication device, or store in memory, etc.) a certain number of data bits to be sent to a wireless communication receiving device through a channel.
  • Such data bits may be contained in a transport block (or transport blocks) of data, which may be segmented to produce multiple code blocks.
  • the communication system 100 may be a public land mobile network (PLMN) network or a D2D network or an M2M network or other networks.
  • PLMN public land mobile network
  • FIG. 1 is only a simplified schematic diagram of an example, and the network may also include other network devices. FIG. 1 not drawn in.
  • the sending device may be the above-mentioned network device 102 or a terminal device (for example, terminal device 116 or terminal device 122), and correspondingly, the receiving device may be the above-mentioned terminal device ( For example, the terminal device 116 or the terminal device 122) may also be the network device 102, which is not particularly limited in this application.
  • DMRS is used as an example for signal transmission
  • other signal types applicable to the embodiments of the present application are within the protection scope of the present application, and are not particularly limited in the present application.
  • Antenna port is referred to as port for short. It can be understood as the transmitting antenna identified by the receiving end, or the transmitting antenna that can be distinguished in space.
  • One antenna port can be configured for each virtual antenna, and each virtual antenna can be a weighted combination of multiple physical antennas. According to different signals carried, the antenna port can be divided into a reference signal port and a data port.
  • the reference signal port includes, but is not limited to, a demodulation reference signal (demodulation reference signal, DMRS) port, a channel state information reference signal (channel state information reference signal, CSI-RS) port, etc., for example.
  • This application includes existing ports and newly added ports.
  • Existing ports refer to ports in existing protocols, or ports that support technical solutions in existing protocols;
  • newly added ports refer to ports that can support the technical solutions of this application .
  • time-frequency resources may include resources in the time domain and resources in the frequency domain.
  • time-frequency resources may include one or more time-domain units (or, may also be referred to as time units, time units), and in the frequency domain, time-frequency resources may include one or more frequency-domain units .
  • a time domain unit can be a symbol or several symbols (such as orthogonal frequency division multiplexing (OFDM) symbols), or a mini-slot (mini-slot), or a slot (slot ), or a subframe (subframe), where the duration of a subframe in the time domain can be 1 millisecond (ms), a slot consists of 7 or 14 symbols, and a mini-slot can include at least one symbols (for example, 2 symbols or 7 symbols or 14 symbols, or any number of symbols less than or equal to 14 symbols).
  • OFDM orthogonal frequency division multiplexing
  • mini-slot mini-slot
  • slot slot
  • subframe subframe
  • the duration of a subframe in the time domain can be 1 millisecond (ms)
  • a slot consists of 7 or 14 symbols
  • a mini-slot can include at least one symbols (for example, 2 symbols or 7 symbols or 14 symbols, or any number of symbols less than or equal to 14 symbols).
  • a frequency domain unit can be a resource block (resource block, RB), or a subcarrier (subcarrier), or a resource block group (resource block group, RBG), or a predefined subband (subband), or a Precoding resource block group (precoding resource block group, PRG), or a bandwidth part (bandwidth part, BWP), or a resource element (resource element, RE) (or resource element), or a carrier, or a serving cell.
  • the transmission unit mentioned in the embodiment of the present application may include any of the following: time domain unit, frequency domain unit, or time-frequency unit, for example, the transmission unit mentioned in the embodiment of the present application may be replaced by a time domain unit, It can also be replaced by a frequency domain unit, or can be replaced by a time-frequency unit. In another example, the transmission unit may also be replaced by a transmission opportunity.
  • the time domain unit may include one or more OFDM symbols, or the time domain unit may include one or more slots, and so on.
  • a frequency domain unit may include one or more RBs, or a frequency domain unit may include one or more subcarriers, and so on.
  • multiple parallel data streams can be transmitted simultaneously on the same time-frequency resource, and each data stream is called a spatial layer or spatial stream.
  • the DMRS is used to estimate the equivalent channel matrix experienced by a data channel (such as PDSCH) or a control channel (such as PDCCH), so as to be used for data detection and demodulation.
  • a data channel such as PDSCH
  • a control channel such as PDCCH
  • the DMRS usually performs the same precoding as the transmitted data signal, so as to ensure that the DMRS and the data experience the same equivalent channel.
  • the DMRS vector sent by the transmitter is s
  • the transmitted data symbol vector is x
  • the DMRS and the data perform the same precoding operation (multiplied by the same precoding matrix P)
  • the corresponding received signal vector at the receiver can be expressed as:
  • the experienced equivalent channels are Based on the known DMRS vector s, the receiving end can obtain the equivalent channel estimate. Based on the equivalent channel, MIMO equalization and subsequent demodulation of the data signal can be completed.
  • DMRS Downlink Reference Signal
  • R the number of transmission streams (rank).
  • one DMRS port corresponds to one spatial layer.
  • R the number of DMRS ports required is R.
  • DMRS symbols corresponding to different DMRS ports are orthogonal in the frequency domain, time-frequency domain or code domain.
  • 5G NR supports 2 types of DMRS resource mapping.
  • DMRS Downlink Reference Signal
  • the DMRS is an important reference signal for detection at the receiving end.
  • the DMRS is sent together with the transmitted data channel (eg PDSCH).
  • the NR DMRS port is an orthogonal DMRS port, that is, the DMRS symbols corresponding to different DMRS ports are frequency division multiplexing and/or code division multiplexing.
  • a DMRS port in order to perform channel estimation on different time-frequency resources and ensure channel estimation quality, it is necessary to transmit multiple DMRS symbols in multiple time-frequency resources.
  • the sending device (for example, the first sending device) may be a network device (for example, an access network device) or a terminal device, which is not particularly limited in this application.
  • the sending device When it is a network device, it can perform the actions performed by the network device in the following description; when the sending device is a terminal device, it can perform the actions performed by the terminal device in the following description.
  • the receiving device (for example, the first receiving device) may be a network device (for example, an access network device) or a terminal device, which is not particularly limited in this application.
  • the receiving device is a network device
  • the following description may be performed Actions performed by the network device; when the receiving device is a terminal device, the actions performed by the terminal device in the following description may be performed.
  • FIG. 4 shows a schematic interaction diagram of a method 200 for transmitting and receiving reference signals.
  • the transmitting device #A ie, an example of the first transmitting device
  • the sending device #A determines (or generates) a reference signal #A (such as DMRS #A) (that is, an example of the first DMRS).
  • DMRS #A DMRS #A
  • the process of generating DMRS#A may be similar to the prior art, and detailed description thereof is omitted here to avoid redundant description.
  • the DMRS #A is a DMRS of type #A (that is, an example of the first type).
  • the sending device #A can determine the antenna port of the DMRS #A, which is referred to as: antenna port #A for ease of understanding and distinction. It should be noted that the antenna port #A is only used to correspond to the DMRS #A, and the number of antenna ports is not limited, that is, the antenna port #A may represent one or more antenna ports.
  • the antenna port of the DMRS can be determined by the network device and sent to the terminal device through RRC signaling, MAC signaling, or physical layer signaling (such as DCI signaling, etc.) of. Therefore, when the sending device #A is a network device, the sending device #A can determine the antenna port #A by itself; when the sending device #A is a terminal device, the sending device #A can , determine the antenna port #A.
  • the antenna port #A is an antenna port supported by the sending device #A, including existing ports and newly added ports.
  • the UE may report the capability of supporting the newly added port, and the network device may allocate a port for the UE based on the reported capability.
  • the antenna port of the first DMRS is determined from all antenna ports supported by the sending device.
  • the sending device can support multiple antenna ports, specifically, can support sending a signal (for example, DMRS) through each antenna port of the multiple antenna ports.
  • a signal for example, DMRS
  • each type of DMRS can only be sent through an antenna port corresponding to the type of DMRS.
  • the antenna port of the DMRS may correspond to the antenna port index, and the antenna port corresponding to the DMRS may be 0, 1, 2, ..., 11, or may be 1000, 1001, 1002, ..., 1011. Or the antenna port index corresponding to the DMRS may be 0, 1, 2, ..., 11, or the antenna port index corresponding to the DMRS may be 1000, 1001, 1002, ..., 1011.
  • each type of DMRS can be sent through any one of all antenna ports supported by the sending device.
  • the antenna ports in the configuration pattern may not be bound to the type of DMRS, or in other words, each type of DMRS can be sent through any antenna port in the configuration pattern .
  • the configuration pattern may be a formula, a table or an illustration representing a rule for mapping sequence elements and time-frequency resources, which is not limited in the present application. It should also be understood that the configuration pattern may be indicated by the network device, or may be predefined, which is not limited in this application.
  • the sending device #A may support all antenna ports in the configuration pattern.
  • Sending device #A can use antenna ports a and b to send DMRS #A in one time period, and use antenna ports e and f to send DMRS #A in another time period.
  • the sending device #A may notify the antenna port index and/or the number of antenna ports used by the DMRS#A through RRC signaling, MAC signaling or physical layer signaling, etc. receiving device.
  • the sending device #A can determine the antenna port index and/or the number of antenna ports used by the DMRS#A by receiving RRC signaling or MAC signaling or physical layer signaling, wherein the DMRS The antenna port index and/or the number of antenna ports used by #A are determined by the network device and notified to the terminal device.
  • the terminal device can report the maximum number of antenna ports or the maximum number of layers that the device can support to the network device in advance, so that the network device can determine the antenna port or the number of antenna ports that the terminal device can support.
  • the receiving device of the DMRS #A may determine the antenna port #A, and receive
  • the process of determining the antenna port #A by the device #A can be similar to the process of determining the antenna port #A by the transmitting device #A, that is, when the receiving device #A is a network device, the receiving device #A can determine the antenna port # by itself A: When the receiving device #A is a terminal device, the receiving device #A can determine the antenna port #A according to the indication of the network device it is connected to.
  • the transmitting device #A can determine the configuration pattern based on the antenna port #A, thereby determining the time-frequency resource corresponding to the antenna port #A (hereinafter, for the convenience of understanding and description, it is recorded as: time-frequency resource #A) , map the DMRS #A to the time-frequency resource #A, and send the DMRS #A through the antenna port #A.
  • the system time-frequency resources (or in other words, the time-frequency resources included in the configuration pattern) can be divided into multiple basic time-frequency resource units (for example, one or more RBs or one or more RE), the time-frequency resource #A may be located on all basic time-frequency resource units in the system time-frequency resources, or on some basic time-frequency resource units in the system time-frequency resources, for example, the time-frequency resource #A It is located on one RB or multiple RBs in the system time-frequency resources, which is not particularly limited in this application.
  • time-frequency Resource #A1 in addition to the DMRS #A, all or part of the time-frequency resources (for example, all or part of the REs) in which the time-frequency resource #A exists carry one or more other DMRS (for example, DMRS #B and/or DMRS #C described later), in order to facilitate understanding and distinction, some or all of the time-frequency resources bearing at least two types of DMRS on time-frequency resource #A are recorded as: time-frequency Resource #A1.
  • the DMRS #A and the other one or more DMRSs may use, for example, code division multiplexing to multiplex the time-frequency resource #A1.
  • the sending device #A can determine the code resource (for example, a code division multiplexing (CDM) code) corresponding to the DMRS #A, and the following, in order to facilitate understanding and distinction, are recorded as: code resource #A).
  • code resource #A a code division multiplexing (CDM) code
  • the code resource corresponding to DMRS #A can be understood as that DMRS #A is multiplexed on the time-frequency resource #A1 based on the code resource #A.
  • the maximum number of DMRS ports multiplexed on the same time-frequency resource can be determined based on the length of the code resource. For example, if the length of the code resource is 4, the maximum number of DMRS ports can be Multiplexing of 4 DMRSs in the same time-frequency resource is supported. If the length of the code resource is 8, multiplexing of 8 DMRSs in the same time-frequency resource can be supported.
  • the code resource corresponding to each DMRS may be determined by a network device (which may serve as a DMRS sending device or a receiving device) and notified to a terminal device (which may serve as a DMRS sending device or a receiving device).
  • the code resource corresponding to each DMRS may be preset, and the code resource corresponding to each DMRS corresponds to the DMRS port index.
  • the code resource corresponding to each type of DMRS may be specified by the communication system or communication protocol, so that the code resource may be determined according to the type of the actually sent DMRS, and or the port index corresponding to the actually sent DMRS.
  • the code resource corresponding to the DMRS may be specified by the communication system or communication protocol, so that the code resource may be determined according to the type of the actually sent DMRS, and or the port index corresponding to the actually sent DMRS.
  • the method for determining the code resource listed above is only an example, and the present application is not limited thereto.
  • the method for determining the code resource in the embodiment of the present application may also be similar to the prior art. Here, in order to avoid redundant description, it is omitted its detailed description.
  • the code resource #A is orthogonal to code resources (eg, CDM codes) corresponding to other DMRSs (eg, DMRS #B and/or DMRS #C described later) carried on the time-frequency resource #A1. Therefore, the sending device #A can also multiplex the DMRS #A on the time-frequency resource #A1 based on the code resource #A.
  • code resources eg, CDM codes
  • the receiving device #A may determine the configuration pattern based on the antenna port #A, thereby determining the time-frequency resource #A corresponding to the antenna port #A, and receiving the DMRS #A through the time-frequency resource #A , and, the process of determining the time-frequency resource #A by the receiving device #A may be similar to the process of determining the time-frequency resource #A by the transmitting device #A, and the detailed description thereof is omitted here to avoid repetition.
  • the receiving device #A can also determine the code resource #A, and obtain the DMRS #A from the time-frequency resource #A1 based on the code resource #A, and the process of the receiving device #A determining the code resource #A can be compared with the sending device #
  • the process for A to determine the code resource #A is similar, and the detailed description thereof is omitted here to avoid repetition.
  • the same code resource #A can also be used on other time-frequency resources in the time-frequency resource #A except the time-frequency resource #A1.
  • sequences in this application can be used for DMRS, and can also be used for other reference signals, such as CSI-RS, CRS, SRS, etc., which is not limited in this application.
  • the DMRS can occupy at least one OFDM symbol in the time domain, and the bandwidth occupied in the frequency domain is the same as the scheduling bandwidth of the scheduled data signal.
  • Multiple DMRS symbols corresponding to one port correspond to one DMRS base sequence, and one DMRS base sequence includes multiple DMRS base sequence elements. Taking the DMRS base sequence corresponding to the existing port as an example, the nth element in the DMRS base sequence can be generated by the following formula:
  • the DMRS base sequence r(n) generated based on the gold sequence can satisfy the following formula:
  • c(n) is a pseudo-random sequence
  • generation formula is:
  • N C 1600
  • the initialization of x 2 (n) satisfy:
  • l is the OFDM symbol index in a slot
  • slot index in a system frame is the number of OFDM symbols in a time slot
  • N ID 0 , N ID 1 ⁇ 0,1,2,3,4,5,6... ⁇
  • the values are all integers, and can be configured by high-level signaling. It is related to a cell identification (identification, ID), and generally may be equal to a cell ID. For initialization parameters, the value can be 0 or 1.
  • ID represents a CDM group (CDM group) index corresponding to the DMRS port.
  • the OFDM symbol may also be referred to as a symbol for short. If not specified otherwise, the symbol hereinafter refers to an OFDM symbol.
  • the DMRS base sequence corresponding to a port is multiplied by the corresponding mask sequence and then mapped to the corresponding time-frequency resource through a preset time-frequency resource mapping rule.
  • two types of DMRS configuration methods are defined, including Type1DMRS and Type2DMRS.
  • the mth element r(m) in the corresponding DMRS base sequence is mapped to a resource element (resource element, RE) with an index of (k,l) p, ⁇ according to the following rules.
  • RE resource element
  • the RE with index (k, l) p, ⁇ corresponds to the OFDM symbol with index l in a time slot in the time domain, and corresponds to the subcarrier with index k in the frequency domain
  • the mapping rule satisfies:
  • p is the index of the DMRS port, is the symbol index of the start OFDM symbol occupied by the DMRS modulation symbol or the symbol index of the reference OFDM symbol
  • w f (k′) is the frequency-domain mask sequence element corresponding to the subcarrier with index k’
  • w t (l′) is the time-domain mask sequence element corresponding to the OFDM symbol whose index is l'.
  • the reference signal sequence corresponding to the newly added port Elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • k is an integer from 0 to K-1
  • K is The total number of subcarriers occupied in the frequency domain
  • l is 0 or 1
  • ⁇ is a non-zero complex number
  • the number of elements included in the mask sequence w is I
  • (I/2) or i (k mod(I/2)) ⁇ 2+l
  • r(k,l) is the element mapped on the kth subcarrier and the lth symbol of the base sequence r, the base sequence r
  • the generation method of can be shown as formula (1).
  • a mod B means modulo operation, which is used to represent the remainder obtained by dividing A by B. It can also be recorded as A%B or mod(A,B), and floor(A) represents the rounding operation on A, which is used for Indicates the largest integer not greater than A.
  • each element in the block sequence corresponds to a sequence block composed of a mask sequence with a length of 1, as shown in formula (5), the 1 time-frequency resources corresponding to consecutive 1/2 subcarriers and 2 OFDM symbols Particles each correspond to an element in the block sequence.
  • the I elements contained in the mask sequence w(i) all correspond to one element in the block sequence.
  • the values of w f (k′), w t (l′) and ⁇ corresponding to the existing DMRS port p can be determined according to Table 1.
  • Table 1 Type 1DMRS parameter values
  • the values of w f (k′), w t (l′) and ⁇ corresponding to the existing DMRS port p can be determined according to Table 2.
  • ⁇ is the index of the CDM group to which the existing port p belongs, and the time-frequency resources occupied by the DMRS ports in the same CDM group are the same.
  • the Type1 DMRS time-frequency resource mapping manner is shown in (a) in FIG. 2 .
  • CDM group 0 includes port 0 and port 1
  • CDM group 1 includes port 2 and port 3.
  • CDM group 0 and CDM group 1 frequency division multiplexing (mapped on different frequency domain resources).
  • the DMRS ports included in the CDM group are mapped to the same time-frequency resources.
  • the reference signal sequences corresponding to the DMRS ports contained in the CDM group are distinguished by the mask sequence, thereby ensuring the orthogonality of the DMRS ports in the CDM group, thereby suppressing the interference between DMRS transmitted on different antenna ports.
  • port 0 and port 1 are located in the same RE, and resource mapping is performed in a comb-tooth manner in the frequency domain. That is, the adjacent frequency domain resources occupied by port 0 and port 1 are separated by one subcarrier.
  • two adjacent occupied REs correspond to a mask sequence with a length of 2.
  • port 0 and port 1 use a set of mask sequences of length 2 (+1+1 and +1-1).
  • port 2 and port 3 are located in the same RE, and are mapped to unoccupied REs of port 0 and port 1 in a comb-tooth manner in the frequency domain.
  • port 2 and port 3 use a set of mask sequences of length 2 (+1+1 and +1-1).
  • p in this application form is a port index
  • a port with a port index of 1000 can be port 0 or port
  • a port with a port index of 1001 can be port 1 or port 1
  • a port with a port index of 100X Can be port X or port X.
  • the 8 DMRS ports are divided into 2 CDM groups, where CDM group 0 includes port 0, port 1, port 4, and port 5; CDM group 1 includes port 2, port 3, port 6, and port 7.
  • CDM group 0 and CDM group 1 are frequency division multiplexing.
  • the DMRS ports included in the CDM group are mapped to the same time-frequency resources.
  • the reference signal sequences corresponding to the DMRS ports included in the CDM group are distinguished by mask sequences.
  • port 0, port 1, port 4, and port 5 are located in the same RE, and resource mapping is performed in a comb-tooth manner in the frequency domain, that is, adjacent frequencies occupied by port 0, port 1, port 4, and port 5 Domain resources are separated by one subcarrier.
  • the occupied 2 adjacent subcarriers and 2 OFDM symbols correspond to a mask sequence with a length of 4.
  • port 0, port 1, port 4 and port 5 use a set of mask sequences with a length of 4 (+1+1+1+1/ +1+1-1-1/+1-1+1-1/+1-1-1+1).
  • port 2, port 3, port 6, and port 7 are located in the same RE, and are mapped to unoccupied subcarriers of port 0, port 1, port 4, and port 5 in a comb-tooth manner in the frequency domain.
  • port 2, port 3, port 6 and port 7 use a set of mask sequences of length 4 (+1+1+1+1/+1 +1-1-1/+1-1+1-1/+1-1-1+1).
  • DMRS For single-symbol DMRS, a maximum of 6 ports are supported, and DMRS resources occupy one OFDM symbol.
  • the 6 DMRS ports are divided into 3 CDM groups, where CDM group 0 includes port 0 and port 1; CDM group 1 includes port 2 and port 3; CDM group 2 includes port 4 and port 5.
  • Frequency division multiplexing is used between CDM groups, and the DMRS corresponding to the DMRS ports included in the CDM group are mapped on the same time-frequency resource.
  • the reference signal sequences corresponding to the DMRS ports included in the CDM group are distinguished by mask sequences. For a DMRS port, its corresponding DMRS reference signal is mapped in a plurality of resource subblocks containing 2 consecutive subcarriers in the frequency domain, and adjacent resource subblocks are separated by 4 subcarriers in the frequency domain.
  • port 0 and port 1 are located in the same RE, and resource mapping is performed in a comb-tooth manner in the frequency domain.
  • resource mapping is performed in a comb-tooth manner in the frequency domain.
  • resource granularity 1 RB as an example
  • port 0 and port 1 occupy subcarrier 0, subcarrier 1, subcarrier 6 and subcarrier 7.
  • Port 2 and port 3 occupy subcarrier 2, subcarrier 3, subcarrier 8 and subcarrier 9.
  • Port 4 and port 5 occupy subcarrier 4, subcarrier 5, subcarrier 10 and subcarrier 11.
  • 2 DMRS ports included in one CDM group they correspond to mask sequences of length 2 (+1+1 and +1-1) in 2 adjacent subcarriers.
  • DMRS For dual-symbol DMRS, a maximum of 12 ports are supported, and DMRS resources occupy two OFDM symbols.
  • the 12 DMRS ports are divided into 3 CDM groups, where CDM group 0 includes port 0, port 1, port 6, and port 7; CDM group 1 includes port 2, port 3, port 8, and port 9; CDM group 2 includes port 4, port 5, port 10, and port 11.
  • Frequency division multiplexing is used between CDM groups, and the DMRS corresponding to the DMRS ports included in the CDM group are mapped on the same time-frequency resource.
  • the reference signal sequences corresponding to the DMRS ports included in the CDM group are distinguished by mask sequences. For a DMRS port, its corresponding DMRS reference signal is mapped in a plurality of resource subblocks containing 2 consecutive subcarriers in the frequency domain, and adjacent resource subblocks are separated by 4 subcarriers in the frequency domain.
  • port 0, port 1, port 6, and port 7 are located in the same RE, and resource mapping is performed in a comb-tooth manner in the frequency domain.
  • resource mapping is performed in a comb-tooth manner in the frequency domain.
  • port 0, port 1, port 6 and port 7 occupy subcarrier 0, subcarrier 1, subcarrier 6 and subcarrier 7 corresponding to OFDM symbol 0 and OFDM symbol 1.
  • Port 2, port 3, port 8, and port 9 occupy subcarrier 2, subcarrier 3, subcarrier 8, and subcarrier 9 corresponding to OFDM symbol 1 and OFDM symbol 2.
  • Port 4, port 5, port 10, and port 11 occupy subcarrier 4, subcarrier 5, subcarrier 10, and subcarrier 11 corresponding to OFDM symbol 1 and OFDM symbol 2.
  • the corresponding length of 4 mask sequences (+1+1+1+1/+1+1- 1-1/+1-1+1-1/+1-1-1+1).
  • the embodiment of the present application uses the mask sequence as an example as a code representing the orthogonality of the transmitted data, and other applicable codes are also within the protection scope of the present application, which is not limited by the present application.
  • the sending end device sends the reference signal of the existing port (that is, the first reference signal) and the reference signal of the newly added port (that is, the second reference signal) on the same resource, and the receiving end device The reference signal of the existing port and the reference signal of the newly added port are received on the same resource, and channel estimation is performed according to the reference signal sequence corresponding to each reference signal.
  • each DMRS port is divided into 3 CDM groups.
  • the basic frequency-domain granularity of its time-frequency resource mapping is 6 consecutive subcarriers.
  • the 6 consecutive sub-carriers and 2 OFDM symbols are divided into 3 time-frequency resource sub-blocks, and each time-frequency resource sub-block includes 2 consecutive sub-carriers and 2 OFDM symbols.
  • the three time-frequency resource sub-blocks are frequency division multiplexed.
  • the reference signal sequences corresponding to the 4 DMRS ports included in each CDM group are multiplied by a mask sequence with a length of 4 and then mapped to all REs included in the same resource sub-block.
  • DMRS port 1 in the time-frequency resource block composed of 12 REs shown in Figure 3, 4 REs corresponding to 2 consecutive subcarriers and 2 OFDM symbols are occupied, and the corresponding mask sequence with a length of 4 is + 1, -1, +1, -1.
  • the number of transmitting and receiving antennas will further increase (for example, the number of transmitting antennas of network equipment supports 128T or 256T, and the number of receiving antennas of terminals is 8R, where T indicates the transmitting port and R indicates the receiving port)
  • the acquisition of channel information will be more accurate, and can further support a higher number of transmission streams to improve the spectral efficiency of the MIMO system.
  • This will inevitably require more DMRS ports to support a higher number of transmission streams (greater than 12 streams). Therefore, it is necessary to improve the current DMRS port configuration method to support a higher number of transmission streams.
  • an embodiment of the present application provides a communication method.
  • the communication method can be performed by terminal devices and network devices.
  • the terminal device is, for example, the terminal device 101 shown in FIG. 1
  • the network device is, for example, the network device 102 shown in FIG. 1 .
  • the communication method provided by the embodiment of the present application will be described by taking the terminal device as a UE and the network device as a base station as an example. It should be understood that in this method, the number of ports indicated by the RRC message can be expanded by indicating the ports during the sending of the reference signal, so as to increase the number of transmission streams.
  • the reference signal includes but is not limited to DMRS.
  • the reference signal is mainly DMRS as an example for illustration, and the DMRS can be replaced by other types of reference signals according to actual needs.
  • the communication method provided by the embodiment of the present application may include the following steps:
  • the base station sends indication information (the indication information may also be referred to as port indication information or reference signal port indication information in this application).
  • the indication information may be used to indicate a port, where the port belongs to the first port set or the second port set.
  • the first port set corresponds to N first time-frequency resource groups
  • the second port set corresponds to M second time-frequency resource groups.
  • M and N are positive integers.
  • M is greater than N.
  • the time-frequency resources corresponding to the N first time-frequency resource groups do not overlap, for example, the time-domain positions and/or frequency-domain positions of different time-frequency resources occupied by the same or different first time-frequency resource groups are different. coincide.
  • the time-frequency resources corresponding to the M second time-frequency resource groups do not overlap.
  • a time-frequency resource group may be a collection of multiple time-frequency resources, where multiple time-frequency resources may occupy one or more symbols in the time domain, and may occupy one or more subcarriers in the frequency domain. In the same time-frequency resource group, the time-frequency resources occupy the same number of symbols and the same number of subcarriers.
  • a time-frequency resource group may correspond to a CDM group.
  • a first time-frequency resource group is a CDM group
  • a second time-frequency resource group is a CDM group.
  • the number of time-frequency resources occupied by the N first time-frequency resource groups is the same as the number of time-frequency resources occupied by the M second time-frequency resource groups.
  • the N first time-frequency resource groups and the M second time-frequency resource groups may each include 12 REs.
  • the number of REs occupied by each first time-frequency resource group may be the same or different, and the number of REs occupied by each second time-frequency resource group may be the same or different.
  • Any first time-frequency resource group and any second time-frequency resource group The number of REs occupied by frequency resource groups may be the same or different.
  • the quantity of time-frequency resources occupied by at least one first time-frequency resource group may be the same as the quantity of time-frequency resources occupied by at least two second time-frequency resource groups.
  • a first time-frequency resource group can occupy 6 REs
  • the number of time-frequency resources occupied by two second time-frequency resource groups is 6, for example, a time-frequency resource group can occupy 6 REs.
  • a frequency resource group occupies 3 REs
  • another time-frequency resource group occupies another 3 REs.
  • the N first time-frequency resource groups and the M second time-frequency resource groups occupy the same OFDM symbol in the same time slot.
  • the REs occupied by the N first time-frequency resource groups and the REs occupied by the M second time-frequency resource groups are located in the same OFDM symbol in the time domain.
  • At least one second time-frequency resource group is a subset of one time-frequency resource group in the N first time-frequency resource groups, for example, the second time-frequency resource group
  • the frequency resource group is a proper subset of the first time-frequency resource group.
  • the REs in at least one time-frequency resource group can form at least two second time-frequency resource groups, or in other words, the time-frequency resources (such as REs) occupied by at least one first time-frequency resource group are combined with at least two second time-frequency resource groups.
  • the time-frequency resources occupied by the two time-frequency resource groups are the same.
  • the time unit occupied by at least one first time-frequency resource group is the same as the time unit occupied by at least two second time-frequency resource groups, where the time unit is, for example, a time slot and/or an OFDM symbol in a time slot.
  • two second time-frequency resource groups are formed by REs in one first time-frequency resource group, and the two second time-frequency resource groups are proper subsets of the first time-frequency resource group. If the number of time-frequency resources occupied by the two second time-frequency resource groups is the same, the number of time-frequency resources occupied by the first time-frequency resource group is twice the number of time-frequency resources occupied by one of the second time-frequency resource groups .
  • the second time-frequency resource group a and the second time-frequency resource group b are respectively proper subsets of the first time-frequency resource group a, and the second time-frequency resource group b can also be regarded as the first time-frequency resource group b A subset of resource group b.
  • subcarriers occupied by at least one second time-frequency resource group in one frequency domain unit are a subset of one first time-frequency resource group.
  • one RB may include 12 subcarriers with indices of 0, 1, 2...11, and the indices of the subcarriers occupied by a first time-frequency resource group are 0, 2, 4, 6...10, correspondingly, the subcarrier indexes occupied by a second time-frequency resource group may be 0, 4 and 8, and/or, the subcarrier indexes occupied by a second time-frequency resource group may be 2, 6 and 10.
  • the CDM group 0 shown by the number a in Figure 6 is the same as the CDM group 0 configuration in the single-symbol DMRS type 1 configuration shown by the number a in Figure 2, and the CDM group 2 shown by the number a in Figure 6 includes the RE For RE1, RE5, and RE9, the ports corresponding to CDM group 3 are port 6 and port 7, and port 6 and port 7 correspond to different OCCs.
  • the REs included in CDM group 3 are RE3, RE7, and RE11, and the ports corresponding to CDM group 2 are port 4 and port 5, and port 4 and port 5 correspond to different OCCs.
  • CDM group 2 and CDM group 3 refer to the description of CDM group 2 and CDM group 3 shown in number a in Fig. 6 .
  • the REs included in the CDM group 4 are RE0, RE4 and RE8, the ports corresponding to the CDM group 4 are port 8 and port 9, and the ports 8 and 9 correspond to different OCCs.
  • the REs included in the CDM group 5 are RE2, RE6 and RE10, the ports corresponding to the CDM group 5 are port 10 and port 11, and the port 10 and port 11 correspond to different OCCs.
  • the port indication information may be used to indicate the port corresponding to the reference signal.
  • the indication information may be used to indicate the DMRS port.
  • the indication information may include a port index.
  • the base station may send the indication information to the UE to indicate the port.
  • the UE receives the indication information of the port.
  • S102 The UE determines a port index corresponding to the reference signal according to the indication information.
  • the indication information of the port includes but not limited to the port index.
  • the UE may also determine the second time-frequency resource group corresponding to the port index according to the correspondence between the indication information and the second time-frequency resource group. It should be understood that the corresponding relationship may be stored in the UE, for example, stored in the UE through pre-configuration or protocol definition; or, the corresponding relationship may be indicated to the UE by the base station or other network equipment, which is not specifically limited in this application.
  • the UE can also send a reference signal according to the port index.
  • the UE is no longer limited to receiving or sending reference signals only through ports in the first port set on these time-frequency resources
  • the reference signal may also be received or sent through ports in the second port set, where the time-frequency resources occupied by at least one second time-frequency resource group are a subset of the time-frequency resources occupied by a first time-frequency resource group, Therefore, the second port set can support more time-frequency resource groups, and thus instructing the second port set to receive or send the reference signal can realize port expansion.
  • the base station when the base station determines that the first port set can meet the requirement for the number of transmission flows, it instructs the UE to receive or send the reference signal through the ports in the first port set;
  • the indication information indicates the ports in the second port set, so that the UE receives or sends the reference signal through the ports in the second port set.
  • the base station may indicate the first time-frequency resource group and the corresponding first port set to the UE through configuration information.
  • the UE may also determine the first time-frequency resource group in a manner of default configuration.
  • the configuration information when configuring the first time-frequency resource group (or configuring the first port set) through configuration information, the configuration information may be used to indicate the DMRS configuration type and/or the number of DMRS symbols corresponding to the first time-frequency resource group.
  • the configuration information may be used to indicate one of DMRS type 1 of single symbol, DMRS type 1 of double symbol, DMRS type 2 of single symbol or DMRS type 2 of double symbol.
  • the configuration information may be indication information carried in the RRC message.
  • the first port set corresponds to 2 CDM groups (or the first port set corresponds to 2 first time-frequency resource groups), and the second port set can correspond to 3 or 4 CDM groups (or the second The port set corresponds to 3 or 4 second time-frequency resource groups, for example, the second port set may correspond to the second time-frequency resource group shown in FIG. 6 or FIG. 7).
  • the first port set corresponds to 3 CDM groups (or the first port set corresponds to 3 first time-frequency resource groups), and the second port set corresponds to 4, 5 or 6 CDM groups (or The second port set corresponds to 4, 5 or 6 second time-frequency resource groups, for example, the second port set may correspond to the second time-frequency resource group shown in FIG. 8 or FIG. 9).
  • the time-frequency resource for the first port set is one of DMRS type 1, double-symbol DMRS type 1, single-symbol DMRS type 2, or double-symbol DMRS type 2 as an example, and the introductions are made respectively.
  • the first port set corresponds to DMRS type 1 of a single symbol
  • the N first time-frequency resource groups may correspond to CDM group 0 and CDM group 1, and correspondingly, M second time-frequency resources
  • the groups may correspond to the CDM groups in the pattern shown by number a or number b in FIG. 6 , such as CDM group 0, CDM group 2 and CDM group 3.
  • FIG. 6 shows two patterns obtained by port expansion based on the single-symbol DMRS resource mapping pattern shown in number a in FIG. 2, which are distinguished by number a and number b in FIG. It may correspond to CDM group 0, CDM group 2, and CDM group 3 in number a, or correspond to one of CDM group 2 to CDM group 5 shown in number b, and the indication information of the port may indicate the second time-frequency resource For the port corresponding to the group, for example, when the second time-frequency resource group corresponds to CDM group 2, the indication information may include port index 4 or 5.
  • the first port set corresponds to the DMRS type 1 of the double symbol
  • the N first time-frequency resource groups may correspond to CDM group 0 and CDM group 1, and correspondingly, M second time-frequency resource groups It may correspond to the CDM group in the pattern shown by number a or number b in FIG. 7 .
  • FIG. 7 shows two patterns obtained by port expansion based on the double-symbol pattern shown in the number a in FIG. 2, which are distinguished by numbers a and b in FIG. CDM group 0, CDM group 2, or CDM group 3 in number a, or one of CDM group 2 to CDM group 5 shown in number b
  • the indication information of the port can indicate the corresponding time-frequency resource group port, for example, when the second time-frequency resource group corresponds to CDM group 2, the indication information may include any one of port indexes 12 to 15.
  • the REs corresponding to CDM group 3 under the dual-symbol DMRS type 1 configuration are RE3, RE7 and RE11, and the ports corresponding to CDM group 3 are port 12, port 13, port 14 and Port 15, port 12, port 13, port 14, and port 15 correspond to different OCCs, the REs included in CDM group 2 are RE1, RE5, and RE9, and the ports corresponding to CDM group 2 are port 8, port 9, port 10, and port 11. Port 8, port 9, port 10, and port 11 correspond to different OCCs.
  • the REs included in CDM group 5 are RE2, RE6, and RE10
  • the ports corresponding to CDM group 5 are port 20, port 21, port 22, and port 23, and port 20, port 21, port 22, and Port 23 corresponds to a different OCC.
  • the REs included in CDM group 4 are RE0, RE4, and RE8.
  • the ports corresponding to CDM group 4 are port 16, port 17, port 18, and port 19. Port 16, port 17, port 18, and port 19 correspond to different OCCs.
  • the base station may determine the second time-frequency resource group, port
  • the indication information of may include the index of the port corresponding to the second time-frequency resource group.
  • the base station may determine the second time-frequency resource group from CDM group 2 to CDM group 5 shown by number b in FIG. The index of the port corresponding to the two time-frequency resource groups.
  • the first port set corresponds to DMRS type 2 of a single symbol
  • the N first time-frequency resource groups may correspond to CDM group 0, CMD group 1 and CDM group 2, correspondingly, the Mth
  • the two time-frequency resource groups may correspond to the CDM group in the pattern shown by number a or number b in FIG. 8 .
  • FIG. 8 shows three patterns obtained by port expansion based on the single-symbol type 1 pattern shown in number b in FIG. 2, which are distinguished by number a, number b, and number c in FIG.
  • the resource group can correspond to CDM group 0, CDM group 1, CDM group 3 or CDM group 4 in number a, CDM group 0, CDM group 3 to CDM group 6 shown in number b, or CDM group shown in number c 3 to one of CDM group 8
  • the port indication information may indicate the port corresponding to the second time-frequency resource group, for example, when the second time-frequency resource group corresponds to CDM group 3, the indication information may include port index 8 Any of -9.
  • the REs included in CDM group 4 under the single-symbol DMRS type 2 configuration are RE5, RE11, RE17, and RE23, and the ports corresponding to CDM group 4 are port 8 and port 9, the REs included in CDM group 3 are RE4, RE10, RE16, and RE22, and the corresponding ports of CDM group 3 are port 6 and port 7.
  • the REs included in CDM group 6 are RE3, RE9, RE15 (not shown in Figure 8) and RE21 (not shown in Figure 8), and CDM group 6 corresponds to The ports are port 12 and port 13, the REs included in CDM group 5 are RE2, RE8, RE14 (not shown in Figure 8) and RE20 (not shown in Figure 8), and the ports corresponding to CDM group 5 are port 10 and port 11.
  • the REs included in CDM group 8 are RE1, RE7, RE13 (not shown in FIG. 8 ) and RE19 (not shown in FIG.
  • CDM group 8 and the ports corresponding to CDM group 8 are Port 16 and port 17, the REs included in CDM group 7 are RE0, RE6, RE12 (not shown in FIG. 8 ) and RE18 (not shown in FIG. 8 ), and the ports corresponding to CDM group 7 are port 14 and port 15.
  • the base station may determine the second time-frequency resource group from CDM group 3 and CDM group 4 shown in number a in FIG. Including the index of the port corresponding to the second time-frequency resource group.
  • the base station may determine the second time-frequency resource group from CDM group 3 to CDM group 6 shown by number b in FIG. The index of the port corresponding to the two time-frequency resource groups.
  • the base station may determine the second time-frequency resource group from CDM group 3 to CDM group 8 shown by number c in FIG. The index of the port corresponding to the two time-frequency resource groups.
  • the first port set corresponds to the DMRS type 2 of the double symbol
  • the two time-frequency resource groups may correspond to the CDM group in the pattern shown by number a or number b in FIG. 9 , and details may refer to the foregoing description.
  • FIG. 9 shows three patterns obtained by port expansion based on the double-symbol type 2 pattern shown in number b in FIG. 2, which are distinguished by number a, number b, and number c in FIG.
  • the resource group may correspond to at least one of CDM group 0, CDM group 1, CDM group 3 or CDM group 4 in number a, or correspond to CDM group 0, CDM group 3 to CDM group 6 shown in number b
  • the port indication information may indicate the port corresponding to the second time-frequency resource group, for example, when the second time-frequency resource group corresponds to For CDM group 3, the indication information may include any one of port indices 16-19.
  • the REs that can be included in CDM group 4 under the dual-symbol DMRS type 2 configuration are RE5 and RE11
  • the ports corresponding to CDM group 4 are port 16 and port 17
  • the REs included in CDM group 3 are RE4 and RE10
  • the ports corresponding to CDM group 3 are port 12, port 13, port 14, and port 15.
  • the REs included in CDM group 6 are RE3 and RE9
  • the ports corresponding to CDM group 6 are port 24, port 25, port 26, and port 27, and the REs included in CDM group 5
  • the ports corresponding to CDM group 5 are port 20, port 21, port 22, and port 23.
  • the REs included in CDM group 8 are RE1 and RE7
  • the ports corresponding to CDM group 8 are port 32, port 33, port 34, and port 35
  • the REs included in CDM group 7 are RE0 and
  • the ports corresponding to RE6 and CDM group 7 are port 28, port 29, port 30, and port 31.
  • the base station may determine the second time-frequency resource group from the CDM group 3 and the CDM group 4 shown in number a in FIG. Including the index of the port corresponding to the second time-frequency resource group.
  • the base station may determine the second time-frequency resource group from the CDM group 3 to the CDM group 6 shown by number b in FIG. The index of the port corresponding to the two time-frequency resource groups.
  • the base station may determine the second time-frequency resource group from CDM group 3 to CDM group 8 shown by number c in FIG. The index of the port corresponding to the two time-frequency resource groups.
  • the ports in the second port set correspond to comb teeth 4 or comb teeth 6 .
  • comb-tooth n means that Q subcarriers are divided (such as equally divided) into n parts, and the subcarriers in each part correspond to the same port.
  • RE0 to RE11 correspond to CDM group 2 to CDM group 5, that is, the subcarriers are equally divided into 4 parts, so in the numbered b pattern shown in Figure 6, the second port set The port in corresponds to comb tooth 4; as another example, as shown in the number c pattern in Figure 8, RE0 to RE23 correspond to CDM group 3 to CDM group 8, that is, the subcarriers are divided into 6 parts, so in Figure 8 In the pattern shown in the pattern numbered c, the ports in the second port set correspond to the comb teeth 4 .
  • the M second time-frequency resource groups may be obtained by splitting the N first time-frequency resource groups. After splitting, the M second time-frequency resource groups are compared with the N first Time-frequency resource groups can support more ports. Therefore, the process of splitting N first time-frequency resource groups to obtain M second time-frequency resource groups can also be called port expansion, or can be called first The time-frequency resource group is thinned out.
  • the time-frequency resources in the M second time-frequency resource groups are distributed at equal intervals, or in other words, at least one of the M second time-frequency resource groups can be obtained by dividing the first time-frequency resource group at equal intervals, or That is, at least one second time-frequency resource group may be obtained according to the first time-frequency resource group in an equal-interval division manner. Specifically, at least one first time-frequency resource group may be split at equal intervals to obtain at least two second time-frequency resource groups.
  • the second time-frequency resource group may correspond to the single-symbol CDM group 0 or CDM group shown in number a in Figure 2 1 CDM group obtained by splitting.
  • the second time-frequency resource group may correspond to the 3 CDM groups included in the pattern shown by number a in Figure 6 (each CDM group corresponds to two ports, that is, the number of data streams supported by the pattern is 6 streams),
  • the CDM groups are respectively CDM group 0, CDM group 2 and CDM group 3.
  • the CDM group 2 and the CDM group 3 are obtained by splitting the single-symbol CDM group 1 shown by number a in FIG. 2 .
  • the base station may determine the second time-frequency resource group from CDM group 2 and CDM group 3 shown in number a in FIG. Including the index of the port corresponding to the second time-frequency resource group.
  • the second time-frequency resource group may correspond to the 4 CDM groups included in the pattern shown by number b in Figure 6 (each CDM group corresponds to two ports, that is, the number of data streams supported by the pattern is 8 streams), 4
  • the CDM groups are CDM group 2, CDM group 3, CDM group 4 and CDM group 5.
  • CDM group 2 and CDM group 3 are obtained by splitting CDM group 1 under single symbol type 1 shown in number a in Figure 2
  • CDM group 4 and CDM group 5 are obtained according to number a in Figure 2 It is obtained by splitting CDM group 0 under single symbol type 1.
  • CDM group 2, CDM group 3, CDM group 4 and CDM group 5 frequency division multiplex DMRS resources.
  • the base station may determine the second time-frequency resource group from the CDM group 2 to the CDM group 5 shown by number b in FIG. Including the index of the port corresponding to the second time-frequency resource group.
  • the second time-frequency resource group can correspond to the double-symbol CDM group 0 or CDM group 1 shown by the number a in Figure 2 obtained by splitting.
  • the second time-frequency resource group may correspond to the 3 CDM groups included in the pattern shown by number a in Figure 7 (each CDM group corresponds to two ports, that is, the number of data streams supported by the pattern is 6 streams),
  • the CDM groups are respectively CDM group 0, CDM group 2 and CDM group 3.
  • the CDM group 2 and the CDM group 3 are obtained by splitting the double-symbol CDM group 1 shown by number a in FIG. 2 .
  • CDM group 0, CDM group 2 and CDM group 3 frequency division multiplex DMRS resources.
  • the second time-frequency resource group may correspond to the 4 CDM groups included in the pattern shown by number b in Figure 7 (each CDM group corresponds to two ports, that is, the number of data streams supported by the pattern is 8 streams), 4
  • the CDM groups are CDM group 2, CDM group 3, CDM group 4 and CDM group 5.
  • CDM group 2 and CDM group 3 are obtained by splitting according to the double-symbol CDM group 1 shown in the number a in Figure 2
  • CDM group 4 and CDM group 5 are obtained according to the double-symbol CDM group shown in the number a in Figure 2 Group 0 is obtained by splitting.
  • CDM group 2, CDM group 3, CDM group 4 and CDM group 5 frequency division multiplex DMRS resources.
  • the second time-frequency resource group can be CDM group 0, CMD group 1 and CDM group shown in number b in Figure 2 2 other time-frequency resource groups.
  • the second time-frequency resource group corresponds to 4 CDM groups in the pattern shown by number a in Figure 8 (each CDM group corresponds to two ports, that is, the number of data streams supported by the pattern is 8 streams), these 4 The CDM groups are respectively CDM group 0, CDM group 1, CDM group 3 and CDM group 4, wherein CDM group 3 and CDM group 4 are carried out according to CDM group 2 in the single symbol type 2 pattern shown in number b in Figure 2 obtained by splitting.
  • CDM group 0, CDM group 1, CDM group 3 and CDM group 4 frequency division multiplex DMRS resources.
  • the second time-frequency resource group may correspond to 5 CDM groups included in the pattern shown by number b in FIG. 8 (each CDM group corresponds to two ports, that is, the number of data flows supported by the pattern is 10 flows), 5
  • the CDM groups are CDM group 0, CDM group 3, CDM group 4, CDM group 5 and CDM group 6.
  • CDM group 3 and CDM group 4 are obtained by splitting CDM group 2 in the single symbol type 2 pattern shown by number b in Figure 2
  • CDM group 5 and CDM group 6 are obtained by splitting according to number b in Figure 2 obtained by splitting CDM group 1 in the single-symbol type 2 pattern shown.
  • CDM group 0, CDM group 3, CDM group 4, CDM group 5 and CDM group 6 frequency division multiplex DMRS resources.
  • the second time-frequency resource group may correspond to the 6 CDM groups included in the pattern shown by number c in FIG. 8 (each CDM group corresponds to two ports, that is, the number of data streams supported by the pattern is 12 streams),
  • the CDM groups are respectively CDM group 3, CDM group 4, CDM group 5, CDM group 6, CDM group 7 and CDM group 8, wherein, CDM group 3 and CDM group 4 are based on the single symbol shown in number b in Figure 2 CDM group 2 in the type 2 pattern is obtained by splitting, CDM group 5 and CDM group 6 are obtained by splitting CDM group 1 in the single-symbol type 2 pattern shown by number b in Figure 2, CDM group 7 and CDM group 8 are obtained by splitting CDM group 0 in the single-symbol type 2 pattern shown by number b in FIG. 2 .
  • CDM group 3, CDM group 4, CDM group 5, CDM group 6, CDM group 7 and CDM group 8 frequency division multiplex DMRS resources.
  • the second time-frequency resource group may correspond to the double-symbol type 2 pattern shown by number b in Figure 2
  • Other time-frequency resource groups other than CDM group 0, CMD group 1 and CDM group 2.
  • the second time-frequency resource group may correspond to the 4 CDM groups included in the pattern shown by number a in Figure 9 (each CDM group corresponds to two ports, that is, the number of data streams supported by the pattern is 8 streams),
  • the CDM groups are CDM group 0, CDM group 1, CDM group 3 and CDM group 4.
  • CDM group 3 and CDM group 4 are obtained by splitting CDM group 2 in the double-symbol type 2 pattern shown by number b in FIG. 2 .
  • CDM group 0, CDM group 1, CDM group 3 and CDM group 4 frequency division multiplex DMRS resources.
  • the second time-frequency resource group may correspond to 5 CDM groups included in the pattern shown by number b in FIG. 9 (each CDM group corresponds to two ports, that is, the number of data flows supported by the pattern is 10 flows), 5
  • the CDM groups are CDM group 0, CDM group 3, CDM group 4, CDM group 5 and CDM group 6.
  • CDM group 3 and CDM group 4 are obtained by splitting CDM group 2 in the double-symbol type 2 pattern shown by number b in Figure 2
  • CDM group 5 and CDM group 6 are obtained by splitting according to number b in Figure 2 obtained by splitting the CDM group 1 in the double-symbol type 2 pattern shown.
  • CDM group 0, CDM group 3, CDM group 4, CDM group 5 and CDM group 6 frequency division multiplex DMRS resources.
  • the second time-frequency resource group may correspond to the 6 CDM groups included in the pattern shown by number c in FIG. 9 (each CDM group corresponds to two ports, that is, the number of data streams supported by the pattern is 12 streams), 6
  • the CDM groups are CDM group 3, CDM group 4, CDM group 5, CDM group 6, CDM group 7 and CDM group 8.
  • CDM group 3 and CDM group 4 are obtained by splitting CDM group 2 in the double-symbol type 2 pattern shown by number b in Figure 2
  • CDM group 5 and CDM group 6 are obtained by splitting according to number b in Figure 2
  • CDM group 1 in the double-symbol type 2 pattern shown in Figure 2 is obtained by splitting
  • CDM group 7 and CDM group 8 are obtained by splitting CDM group 0 in the double-symbol type 2 pattern shown in number b in Figure 2
  • CDM group 3, CDM group 4, CDM group 5, CDM group 6, CDM group 7 and CDM group 8 frequency division multiplex DMRS resources.
  • the first time-frequency resource group with a larger corresponding reference index may be preferentially split.
  • the splitting of single-symbol CDM group 0 and/or CDM group 1 shown by number a in FIG. 2 is taken as an example for description.
  • splitting can be started from the CDM group corresponding to a larger port index among CDM group 0 and CDM group 1.
  • split CDM group 0 When splitting CDM group 1 still does not meet the needs of the number of transmission streams, split CDM group 0 to obtain two CDM groups corresponding to time-frequency resource groups, corresponding to CDM group 4 and CDM group 5 respectively. That is, it corresponds to the pattern in number b shown in FIG. 6 .
  • the first port set corresponds to the first reference signal sequence
  • the first reference signal sequence Elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • n 0,1,...
  • k is a positive integer greater than 0, l' is 0 or 1, ⁇ is a non-zero complex number, w(k'), w(l') are frequency domain and time domain masks, r(2n+k' ) maps elements on the kth subcarrier and the lth symbol for the base sequence r.
  • the second set of ports corresponds to a second reference signal sequence
  • the second reference signal sequence Elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • n 0,1,...
  • k is a positive integer greater than 0, l' is 0 or 1, ⁇ is a non-zero complex number, w(k'), w(l') are frequency domain and time domain masks, r(2n+k' ) maps elements on the kth subcarrier and the lth symbol for the base sequence r.
  • the second set of ports corresponds to a second reference signal sequence
  • the second reference signal sequence Elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • n 0,1,...
  • k is an integer greater than 0, l' is 0 or 1, ⁇ is a non-zero complex number, w(k'), w(l') are frequency domain and time domain masks, r(n) is the base sequence r maps elements on the kth subcarrier and the lth symbol.
  • the second set of ports corresponds to a second reference signal sequence
  • the second reference signal sequence Elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • n 0,1,...
  • k is a positive integer greater than 0, l' is 0 or 1, ⁇ is a non-zero complex number, w(k'), w(l') are frequency domain and time domain masks, c is 1 or 2, Represents the combing capability of the reference signal port, r(2n+k′) is the element mapped to the kth subcarrier and the lth symbol of the base sequence r.
  • the second set of ports corresponds to a second reference signal sequence
  • the second reference signal sequence Elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • n 0,1,...
  • k is an integer greater than 0, l' is 0 or 1, ⁇ is a non-zero complex number, w(k'), w(l') are frequency domain and time domain masks respectively, c is 1 or 2, indicating The combing capability of the reference signal port, r(n) is the element mapped to the kth subcarrier and the lth symbol of the base sequence r.
  • the single-symbol pattern shown by number a in FIG. 2 can be split to obtain the pattern shown by number a in FIG. 6 .
  • the UE may determine that the second time-frequency resource group is the CDM group 2 in the pattern shown by number a in FIG. 6
  • the indication information of the port indicates port 6 or port 7
  • the UE may determine that the second time-frequency resource group in the pattern shown by number a in FIG. 6 corresponds to CDM group 3.
  • the UE may determine that the time-frequency resource group corresponding to the DMRS is CDM group 0 in the pattern shown by number a in FIG. 6 . Therefore, using the pattern shown in number a in Figure 6, the maximum number of ports supported under the single-symbol DMRS type 1 configuration can be extended from 4 to 6, and the maximum number of data streams supported can be extended from 4 to 6 streams.
  • the single-symbol CDM group 0 shown by the number a in Figure 2 can also be split, Obtain the DMRS resource mapping pattern shown by number b in FIG. 6 .
  • This configuration supports 4 CDM groups (each CDM group corresponds to two ports, that is, the number of supported data streams is 8), which are CDM group 2, CDM group 3, CDM group 4 and CDM group 5.
  • CDM group 2 and CDM group 3 refer to the description of number a in FIG. 6 .
  • the REs included in the CDM group 4 are RE2, RE6 and RE10, the ports corresponding to the CDM group 4 are port 10 and port 11, and the port 10 and port 11 correspond to different OCCs.
  • the REs included in the CDM group 5 are RE0, RE4 and RE8, the ports corresponding to the CDM group 5 are port 8 and port 9, and the ports 8 and 9 correspond to different OCCs.
  • the UE when the configuration information indicates that DMRS type 1 using a single symbol is used, if the port indication information indicates port 4 or port 5, the UE can determine that the second time-frequency resource group corresponds to For CDM group 2, if the port indication information indicates port 6 or port 7, the UE may determine that the second time-frequency resource group corresponds to CDM group 3, and if the port indication information indicates port 10 or port 11, the UE may determine that the second time-frequency resource group corresponds to CDM group 3; The second time-frequency resource group corresponds to CDM group 4, and if the port indication information indicates port 8 or port 9, the UE may determine that the second time-frequency resource group corresponds to CDM group 5. Therefore, using the pattern shown in number b in Figure 6, the maximum number of ports supported under the single-symbol DMRS type 1 configuration can be extended from 4 to 8, and the maximum number of data streams supported can be extended from 4 streams to 8 streams.
  • the N first time-frequency resource groups may correspond to CDM group 0 and CDM group 1, and the second time-frequency resource group may be for CDM Group 0 and/or CDM group 1 split the obtained time-frequency resources.
  • the pattern obtained by splitting CDM group 1 is shown as number b in Figure 7, the REs occupied by a second time-frequency resource group are RE3, RE7, and RE11, and the indication information of the port corresponding to the second time-frequency resource group can be Indicates port 12, port 13, port 14, or port 15.
  • REs occupied by another second time-frequency resource group are RE1, RE5, and RE9, and the port indication information corresponding to the second time-frequency resource group may indicate port 8, port 9, port 10, or port 11.
  • the CDM group 0 can be further split to obtain the pattern shown by number b in FIG. 7 .
  • the REs occupied by a second time-frequency resource group obtained by splitting CDM group 0 are RE2, RE6, and RE10, and the port indication information corresponding to the second time-frequency resource group can indicate port 20, port 21, port 22 or port 23.
  • the REs occupied by another second time-frequency resource group obtained by splitting CDM group 0 are RE0, RE4, and RE8.
  • the port indication information corresponding to the second time-frequency resource group can indicate port 16, port 17, port 18, or port 19.
  • the N first time-frequency resource groups may correspond to CDM group 0, CMD group 1 and In the CDM group 2, the M second time-frequency resource groups may be the CDM groups in the pattern shown by number a, b or c shown in FIG. 8 .
  • the N first time-frequency resource groups may correspond to CDM group 0, CMD group 1 and CDM group 1.
  • the M second time-frequency resource groups may be the CDM groups in the pattern shown by number a, b or c shown in FIG. 9 .
  • the pattern shown in Figure 2 of this application and the patterns shown in Figures 6 to 9 obtained by splitting the pattern shown in Figure 2 are only exemplary illustrations.
  • the resources corresponding to the above DMRS types The mapping pattern may have other forms. For example, if the RE numbers included in the CDM group under the configuration of each DMRS type are changed compared with FIG. Corresponding adjustments are made without giving examples one by one.
  • the network device can determine the time-frequency resources and combing degree corresponding to the DMRS port according to the number of currently scheduled DMRS ports, increase the number of paired streams, improve system efficiency and configuration flexibility, and improve System throughput, solving the problem of limited resources for sending DMRS.
  • the downlink sending process of the reference signal may include the following steps:
  • the network device determines a set of reference signal ports.
  • a set of reference signal ports includes a number of reference signal ports.
  • the reference signal port set may include the first port set and the second port set described in this application.
  • the network device can flexibly choose to use the first port set or the second port set described in this application according to the total number of reference signal ports currently scheduled.
  • the network device may also determine the sequence and time-frequency resource mapping corresponding to the ports in the reference signal port set.
  • n 0,1,...
  • K is The total number of subcarriers occupied in the frequency domain
  • l' is 0 or 1
  • ⁇ is the power coefficient, generally a non-zero complex number
  • w(k') are frequency domain and time domain masks, respectively
  • ⁇ is the subcarrier offset corresponding to each time-frequency resource group
  • c is 1 or 2 (representing the expansion capability coefficient)
  • r(2n+k′) is the element mapped to the kth subcarrier and the lth symbol of the base sequence r.
  • n 0,1,...
  • K is The total number of subcarriers occupied in the frequency domain
  • l' is 0 or 1
  • ⁇ is the power coefficient, generally a non-zero complex number
  • w(k') are frequency domain and time domain masks, respectively
  • ⁇ is the subcarrier offset corresponding to each time-frequency resource group
  • c is 1 or 2 (representing the expansion capability coefficient)
  • r(n) is the element mapped to the kth subcarrier and the lth symbol of the base sequence r.
  • Table 3 corresponds to the pattern obtained by extending configuration type 1 single sign, as shown in FIG. 6
  • Table 4 corresponds to the pattern obtained by extending configuration type 1 double sign, as shown in FIG. 7
  • Table 5 corresponds to the patterns obtained by extending configuration type 2 single symbols, as shown in FIG. 8
  • Table 6 corresponds to the patterns obtained by extending configuration type 2 double symbols, as shown in FIG. 9 .
  • n 0,1,...
  • K is The total number of subcarriers occupied in the frequency domain
  • l' is 0 or 1
  • ⁇ is the power coefficient, generally a non-zero complex number
  • w(k') are frequency domain and time domain masks, respectively
  • ⁇ is the subcarrier offset corresponding to each time-frequency resource group
  • c is 1 or 2 (representing the expansion capability coefficient)
  • the specific value is as shown in any of Table 7 to Table 10
  • k" is 2 or 6 ( Corresponding to different c have different values)
  • r(n) is the element mapped to the kth subcarrier and the lth symbol of the base sequence r.
  • n 0,1,...
  • K is The total number of subcarriers occupied in the frequency domain
  • l' is 0 or 1
  • ⁇ is the power coefficient, generally a non-zero complex number
  • w(k') are frequency domain and time domain masks, respectively
  • ⁇ is the subcarrier offset corresponding to each time-frequency resource group
  • c is 1 or 2 (representing the expansion capability coefficient)
  • the specific value is as shown in any of Table 7 to Table 10
  • k" is 2 or 6 ( Corresponding to different c have different values)
  • r(n) is the element mapped to the kth subcarrier and the lth symbol of the base sequence r.
  • Table 7 corresponds to the pattern obtained by extending the configuration type 1 single symbol, as shown in FIG. 6
  • Table 8 corresponds to the pattern obtained by extending the configuration type 1 double symbol, as shown in FIG. 7
  • Table 9 corresponds to the pattern obtained by extending the configuration type 2 single sign, as shown in FIG. 8
  • Table 10 corresponds to the pattern obtained by extending the configuration type 2 double sign, as shown in FIG. 9 .
  • the network device can further send the reference signal according to the sequence corresponding to the reference signal port and the time-frequency resource mapping.
  • S202 The network device sends reference signal port indication information.
  • the network device can send port type indication information (for indicating configuration type 1 or configuration type 2) through high-layer signaling (such as RRC message), and the network device can send port type indication information through high-layer signaling (such as RRC message) )
  • the UE determines the field length and corresponding interpretation of the antenna port indication information in the DCI according to the above two pieces of information (that is, determines which table in Table 11 to Table 14 the reference signal sequence corresponding to the port corresponds to).
  • the network device can also send downlink control information (such as DCI), which carries port index indication information, and is used to indicate a certain group of port indices from the table (that is, indicate the value in the table (value)), so that the UE can determine the port, configuration type and symbol.
  • DCI downlink control information
  • S203 The terminal device receives reference signal indication information.
  • the terminal device can determine the port corresponding to the reference signal and the time-frequency resource corresponding to the port from the port, configuration type, and symbol relationship configuration tables shown in Table 11 to Table 14 according to the reference signal indication information.
  • S204 The network device generates a reference signal sequence, and sends the reference signal.
  • the network device may determine the sequence and time-frequency resource mapping corresponding to the transmitted reference signal port according to the mapping manner between the sequence and time-frequency resources shown in S201, and transmit the reference signal according to the sequence and time-frequency resource mapping.
  • S205 The terminal device generates a reference signal sequence, and receives the reference signal.
  • the terminal device can generate a corresponding reference signal sequence according to the port index received in S202, detect the reference signal on the corresponding time-frequency resource, perform channel estimation, and obtain the channel estimation result corresponding to the port.
  • the network device can determine the time-frequency resource and combing degree corresponding to the DMRS port according to the number of currently scheduled DMRS ports, increase the number of downlink paired flows, improve system efficiency and configuration flexibility, Improve system throughput and solve the problem of limited resources for sending DMRS.
  • the downlink transmission process of the reference signal may include the following steps:
  • the network device determines a set of reference signal ports.
  • a set of reference signal ports may include a number of reference signal ports.
  • the reference signal port set may include the first port set and the second port set described in this application.
  • the network device can flexibly choose to use the first port set or the second port set described in this application according to the total number of reference signal ports currently scheduled.
  • the network device can also determine the sequence and time-frequency resource mapping corresponding to the ports in the set. For details, refer to the description in S201, which will not be elaborated here.
  • S302 The network device sends reference signal port indication information.
  • the network device can send port type indication information (for indicating configuration type 1 or configuration type 2) through high-layer signaling (such as RRC message); )
  • the UE determines the field length and corresponding interpretation of the antenna port indication information in the DCI according to the above two information (that is, determines which table in Table 11 to Table 14 the reference signal sequence corresponding to the port corresponds to).
  • Table 11 to Table 14 please refer to the introduction in S202.
  • the network device may also send downlink control information, which carries port index indication information, and is used to indicate a certain group of port indices from the table.
  • S303 The terminal device receives reference signal indication information.
  • the terminal device can determine the port corresponding to the reference signal and the time-frequency resource corresponding to the port from the port, configuration type, and symbol relationship configuration tables shown in Table 11 to Table 14 according to the reference signal indication information.
  • S304 The terminal device generates a reference signal sequence, and sends the reference signal.
  • the terminal device may generate a corresponding reference signal sequence according to the port index received in S202.
  • the terminal device may also determine the sequence and time-frequency resource mapping corresponding to the reference signal port according to the mapping manner between the sequence and the time-frequency resource shown in S201, and transmit the reference signal according to the sequence and time-frequency resource mapping.
  • the terminal device may generate a corresponding reference signal sequence according to the port index received in S202.
  • the terminal device may also determine the sequence and time-frequency resource mapping corresponding to the reference signal port according to the mapping manner between the sequence and the time-frequency resource shown in S201, and transmit the reference signal according to the sequence and time-frequency resource mapping.
  • S305 The network device generates a reference signal sequence, and receives the reference signal.
  • the network device can determine the sequence and time-frequency resource mapping corresponding to the transmitted reference signal port according to the mapping mode between the sequence and the time-frequency resource shown in S201, and detect the reference signal on the corresponding time-frequency resource to perform channel estimation, Obtain the channel estimation result corresponding to the port.
  • the network device can determine the time-frequency resource and combing degree corresponding to the DMRS port according to the number of currently scheduled DMRS ports, and further configure the terminal device to increase the number of uplink paired flows, thereby improving system efficiency and configuration flexibility, improve system throughput, and solve the problem of limited resources for sending DMRS.
  • each table in the present invention represents various corresponding relationships, and is only a possible implementation form, which can be stored in a network device or terminal in a pre-configured or stored manner.
  • the final The configuration can be some lines in each of the above-mentioned embodiments.
  • index marked as "reserved” other information may be indicated according to the needs of subsequent evolution or other technical solutions.
  • the various formulas corresponding to the present invention are only representations of a pattern.
  • the embodiment of the present application provides a communication device.
  • the structure of the communication device may be as shown in FIG. 12 , including a processing module 1201 and a communication module 1202 .
  • the communication device can be specifically used to implement the method performed by the terminal device or the network device in the embodiment of the present application.
  • the device can be the network device itself, or a chip or chipset/chip system or The part of a chip that performs the function of the associated method.
  • the communication module 1202 can be used to receive indication information, the indication information is used to indicate that the port belongs to the first port set or the second port set, and the first port set corresponds to N first time-frequency resource group, the second port set corresponds to M second time-frequency resource groups; the time-frequency resources corresponding to the N first time-frequency resource groups do not overlap, and the time-frequency resources corresponding to the M second time-frequency resource groups No overlap; the time-frequency resource occupied by at least one second time-frequency resource group is a subset of the time-frequency resource occupied by the first time-frequency resource group; the processing module 1201 can be used to determine the port index corresponding to the reference signal according to the indication information .
  • the processing module 1201 can be used to determine indication information, the indication information is used to indicate that the port belongs to the first port set or the second port set, the first port set corresponds to N first time-frequency resource groups, The second port set corresponds to M second time-frequency resource groups; the time-frequency resources corresponding to the N first time-frequency resource groups do not overlap, and the time-frequency resources corresponding to the M second time-frequency resource groups do not overlap; The number of time-frequency resources occupied by the N first time-frequency resource groups and the M second time-frequency resource groups is the same; the time-frequency resources occupied by at least one second time-frequency resource group are a first time-frequency resource group A subset of occupied time-frequency resources; the communication module 1202 can be used to send indication information.
  • each functional module in each embodiment of the present application can be integrated In a processor, it may also exist separately physically, or two or more modules may be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware, or in the form of software function modules, or a combination of hardware and software function modules. It can be understood that, for the function or implementation of each module in the embodiment of the present application, further reference may be made to the relevant description of the method embodiment.
  • the communication device may be as shown in FIG. 13 , and the communication device may be a communication device or a chip in the communication device, where the communication device may be a network device or a terminal device.
  • the device may include a processor 1301, optionally the device further includes a communication interface 1302, and optionally the device further includes a memory 1303.
  • the processing module 1201 may be the processor 1301 .
  • the communication module 1202 can be a communication interface 1302 .
  • the processor 1301 may be a central processing unit (central processing unit, CPU), or a digital processing unit, or may be a processing circuit or a logic circuit, and the like.
  • the communication interface 1302 may be a transceiver, an interface circuit such as a transceiver circuit, a transceiver chip, or an input and/or output pin or circuit on a chip or chipset/chip system.
  • the device also includes: a memory 1303 for storing programs executed by the processor 1301 .
  • the memory 1303 can be a non-volatile memory, such as a hard disk (hard disk drive, HDD) or a solid-state drive (solid-state drive, SSD), etc., and can also be a volatile memory (volatile memory), such as a random access memory (random -access memory, RAM).
  • the memory 1303 is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.
  • the processor 1301 is configured to execute the program codes stored in the memory 1303, and is specifically configured to execute the actions of the processing module 1201 described above, which will not be repeated in this application.
  • the communication interface 1302 is specifically used to execute the actions of the above-mentioned communication module 1202, which will not be repeated in this application.
  • a specific connection medium among the communication interface 1302, the processor 1301, and the memory 1303 is not limited.
  • the memory 1303, the processor 1301, and the communication interface 1302 are connected through the bus 1304.
  • the bus is represented by a thick line in FIG. 13, and the connection mode between other components is only for schematic illustration. , is not limited.
  • the bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used to represent the bus 1304 in FIG. 13 , but it does not mean that there is only one bus or one type of bus.
  • An embodiment of the present invention also provides a computer-readable storage medium for storing computer software instructions to be executed for executing the above-mentioned processor, which includes a program for executing the above-mentioned processor.
  • An embodiment of the present invention also provides a computer program product, including a computer program for executing the above-mentioned processor.
  • the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions
  • the device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

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Abstract

本申请公开了一种通信方法及装置，该方法包括：终端设备接收指示信息（S101），指示信息用于指示端口属于第一端口集合或第二端口集合，第一端口集合对应N个第一时频资源组，第二端口集合对应M个第二时频资源组；N个第一时频资源组对应的时频资源不重合，M个第二时频资源组对应的时频资源不重合，至少一个第二时频资源组占用的时频资源是一个第一时频资源组占用的时频资源的子集，终端设备根据指示信息确定参考信号对应的端口索引（S102）。采用本申请的方法可以改进端口与时频资源之间的映射方式，提高传输流数。

Description

一种通信方法及装置
相关申请的交叉引用
本申请要求在2021年12月31日提交中华人民共和国知识产权局、申请号为202111668447.2、申请名称为“一种通信方法及装置”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
本申请涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
解调参考信号(demodulation reference signal，DMRS)可用于估计数据信道(如物理下行共享信道(physical downlink shared channel，PDSCH))或控制信道(如物理下行控制信道(physical downlink control channel，PDCCH))的等效信道矩阵，从而用于数据的检测和解调。通常来说，一个DMRS端口(port)与一个空间层相对应，每个空间层对应于一个数据流。对于传输流数为R的多输入多输出(multiple input and multiple output，MIMO)传输，需要的DMRS端口数目为R。目前第五代(fifth-generation，5G)通信系统中，新无线(new radio，NR)支持2种DMRS资源映射类型，分别为类型1(Type 1)DMRS和类型2(Type 2)DMRS。对于类型1(Type 1)DMRS资源映射类型，最大可支持8个正交的DMRS端口；对于类型2(Type 2)DMRS资源映射类型，最大可支持12个正交的DMRS端口。因此，目前NR最大仅能支持12流的MIMO传输。
随着未来无线通信设备部署更加密集，终端设备数目进一步增长，这对MIMO传输流数提出了更高(大于12流)的需求，目前的端口与时频资源之间的映射方式有待改进。
发明内容
本申请提供一种通信方法及装置，用以改进端口与时频资源之间的映射方式，以提高传输流数。
第一方面，本申请提供一种通信方法。该方法可由终端设备或终端设备中的芯片执行。
以终端设备执行该方法为例，根据该方法，终端设备可接收指示信息，所述指示信息用于指示端口属于第一端口集合或第二端口集合，第一端口集合对应N个第一时频资源组，第二端口集合对应M个第二时频资源组；所述N个第一时频资源组对应的时频资源不重合，所述M个第二时频资源组对应的时频资源不重合；至少一个第二时频资源组占用的时频资源是一个第一时频资源组占用的时频资源的子集；终端设备还可根据所述指示信息确定参考信号对应的端口索引。
采用该方法，终端设备可根据指示信息确定参考信号对应的端口索引，其中，指示信息可指示第一端口集合或第二端口集合中的端口，至少一个第二时频资源组占用的时频资源是一个第一时频资源组占用的时频资源的子集，因此第二端口集合相比于第一端口集合可支持更多的端口，因此该方法可实现端口扩展，实现传输流数的增加。
在一种可能的实现方式中，所述N个第一时频资源组与所述M个第二时频资源组占用的时频资源数量相同。采用该实现方式，可更加灵活和方便的实现端口扩展。
在一种可能的实现方式中，所述至少一个第一时频资源组与至少两个第二时频资源组占用的时频资源相同。采用该实现方式，可更加灵活和方便的实现端口扩展。
在一种可能的实现方式中，至少一个第一时频资源组占用的时频资源数量是一个第二时频资源组占用的时频资源数量的两倍。采用该实现方式，可更加灵活的实现端口扩展。
在一种可能的实现方式中，所述N个第一时频资源组与所述M个第二时频资源组占用相同的时间单元。采用该实现方式，可更加灵活和方便的实现端口扩展。
在一种可能的实现方式中，至少一个第二时频资源组在一个频域单元内占用的子载波是一个第一时频资源组的子集。采用该实现方式，可更加灵活和方便的实现端口扩展。
在一种可能的实现方式中，所述M个第二时频资源组中的时频资源等间隔分布。采用该实现方式，可更加灵活和方便的实现端口扩展。
在一种可能的实现方式中，所述第二端口集合中的端口对应梳齿4；或者，所述第二端口集合中的端口对应梳齿6。采用该实现方式，可更加灵活和方便的实现端口扩展。
在一种可能的实现方式中，所述第一端口集合对应2个CDM组，所述第二端口集合对应3个或4个CDM组；或，所述第一端口集合对应3个CDM组，所述第二端口集合对应4个、5个或6个CDM组。采用该实现方式，可更加灵活和方便的实现端口扩展。
在一种可能的实现方式中，所述第一端口集合对应第一参考信号序列
Figure PCTCN2022143215-appb-000001
所述第一参考信号序列
Figure PCTCN2022143215-appb-000002
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000003
满足下述关系：
Figure PCTCN2022143215-appb-000004
Figure PCTCN2022143215-appb-000005
k′＝0,1
n＝0,1,…
Figure PCTCN2022143215-appb-000006
其中，k是大于0的整数，l′为0或1，β为非零复数,w(k′),w(l′)分别为频域和时域掩码，r(2n+k′)为基序列r映射在第k个子载波和第l个符号上的元素。采用该实现方式，可更加灵活和方便的实现端口扩展。
在一种可能的实现方式中，所述第二端口集合对应第二参考信号序列
Figure PCTCN2022143215-appb-000007
所述第二参考信号序列
Figure PCTCN2022143215-appb-000008
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000009
满足下述关系：
Figure PCTCN2022143215-appb-000010
Figure PCTCN2022143215-appb-000011
k′＝0,1
n＝0,1,…
Figure PCTCN2022143215-appb-000012
其中，k是大于0的整数，l′为0或1，β为非零复数,w(k′),w(l′)分别为频域和时域掩码，r(2n+k′)为基序列r映射在第k个子载波和第l个符号上的元素。采用该实现方式，可更加灵活和方便的实现端口扩展。
在一种可能的实现方式中，所述第二端口集合对应第二参考信号序列
Figure PCTCN2022143215-appb-000013
所述第二参考信号序列
Figure PCTCN2022143215-appb-000014
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000015
满足下述关系：
Figure PCTCN2022143215-appb-000016
Figure PCTCN2022143215-appb-000017
k′＝0,1
n＝0,1,…
Figure PCTCN2022143215-appb-000018
其中，k是大于0的整数，l′为0或1，β为非零复数,w(k′),w(l′)分别为频域和时域掩码，r(n)为基序列r映射在第k个子载波和第l个符号上的元素。
在一种可能的实现方式中，所述第二端口集合对应第二参考信号序列
Figure PCTCN2022143215-appb-000019
所述第二参考信号序列
Figure PCTCN2022143215-appb-000020
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000021
满足下述关系：
Figure PCTCN2022143215-appb-000022
Figure PCTCN2022143215-appb-000023
k′＝0,1
c＝1,2
Figure PCTCN2022143215-appb-000024
n＝0,1,…
Figure PCTCN2022143215-appb-000025
其中，k是大于0的整数，l′为0或1，β为非零复数,w(k′),w(l′)分别为频域和时域掩码，c为1或2，表示参考信号端口的梳分能力，r(2n+k′)为基序列r映射在第k个子载波和第l个符号上的元素。采用该实现方式，可更加灵活和方便的实现端口扩展。
在一种可能的实现方式中，所述第二端口集合对应第二参考信号序列
Figure PCTCN2022143215-appb-000026
所述第二参考信号序列
Figure PCTCN2022143215-appb-000027
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000028
满足下述关系：
Figure PCTCN2022143215-appb-000029
Figure PCTCN2022143215-appb-000030
k′＝0,1
c＝1or 2
Figure PCTCN2022143215-appb-000031
n＝0,1,…
Figure PCTCN2022143215-appb-000032
其中，k是大于0的整数，l′为0或1，β为非零复数,w(k′),w(l′)分别为频域和时域掩码，c为1或2，表示参考信号端口的梳分能力，r(n)为基序列r映射在第k个子载波和第l个符号上的元素。
在一种可能的实现方式中，网络设备可以根据当前调度的总参考信号端口数目，灵活地选择使用本申请中描述的第一端口集合或第二端口集合，也就是通过指示信息指示所选 择的端口。例如，当前的参考信号的配置为type1单符号，最大支持端口数为4，网络设备当前调度的总参考信号端口数目为6，可以对应选择第二端口集合中的端口。
第二方面，本申请提供一种通信方法。该方法可由网络设备或网络设备中的芯片执行。其中，网络设备例如基站等无线接入网设备。
以网络设备是执行主体为例，该方法可包括：网络设备发送指示信息，所述指示信息用于端口属于第一端口集合或第二端口集合，第一端口集合对应N个第一时频资源组，第二端口集合对应M个第二时频资源组；所述N个第一时频资源组对应的时频资源不重合，所述M个第二时频资源组对应的时频资源不重合；所述N个第一时频资源组与所述M个第二时频资源组占用的时频资源数量相同；至少一个第二时频资源组占用的时频资源是一个第一时频资源组占用的时频资源的子集。
在一种可能的实现方式中，所述N个第一时频资源组与所述M个第二时频资源组占用的时频资源数量相同。
在一种可能的实现方式中，所述至少一个第一时频资源组与至少两个第二时频资源组占用的时频资源相同。
在一种可能的实现方式中，至少一个第一时频资源组占用的时频资源数量是一个第二时频资源组占用的时频资源数量的两倍。
在一种可能的实现方式中，所述N个第一时频资源组与所述M个第二时频资源组占用相同的时间单元。
在一种可能的实现方式中，至少一个第二时频资源组在一个频域单元内占用的子载波是一个第一时频资源组的子集。
在一种可能的实现方式中，所述M个第二时频资源组中的时频资源等间隔分布。
在一种可能的实现方式中，所述第二端口集合中的端口对应梳齿4；或者，所述第二端口集合中的端口对应梳齿6。
在一种可能的实现方式中，所述第一端口集合对应2个CDM组，所述第二端口集合对应3个或4个CDM组；或，所述第一端口集合对应3个CDM组，所述第二端口集合对应4个、5个或6个CDM组。
在一种可能的实现方式中，所述第一端口集合对应第一参考信号序列
Figure PCTCN2022143215-appb-000033
所述第一参考信号序列
Figure PCTCN2022143215-appb-000034
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000035
满足下述关系：
Figure PCTCN2022143215-appb-000036
Figure PCTCN2022143215-appb-000037
k′＝0,1
n＝0,1,…
Figure PCTCN2022143215-appb-000038
其中，k是大于0的整数，l′为0或1，β为非零复数,w(k′),w(l′)分别为频域和时域掩码，r(2n+k′)为基序列r映射在第k个子载波和第l个符号上的元素。
在一种可能的实现方式中，所述第二端口集合对应第二参考信号序列
Figure PCTCN2022143215-appb-000039
所述第二参考信号序列
Figure PCTCN2022143215-appb-000040
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000041
满足下述关系：
Figure PCTCN2022143215-appb-000042
Figure PCTCN2022143215-appb-000043
k′＝0,1
n＝0,1,…
Figure PCTCN2022143215-appb-000044
其中，k是大于0的整数，l′为0或1，β为非零复数,w(k′),w(l′)分别为频域和时域掩码，r(2n+k′)为基序列r映射在第k个子载波和第l个符号上的元素。
在一种可能的实现方式中，所述第二端口集合对应第二参考信号序列
Figure PCTCN2022143215-appb-000045
所述第二参考信号序列
Figure PCTCN2022143215-appb-000046
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000047
满足下述关系：
Figure PCTCN2022143215-appb-000048
Figure PCTCN2022143215-appb-000049
k′＝0,1
n＝0,1,…
Figure PCTCN2022143215-appb-000050
其中，k是大于0的整数，l′为0或1，β为非零复数,w(k′),w(l′)分别为频域和时域掩码，r(n)为基序列r映射在第k个子载波和第l个符号上的元素。
在一种可能的实现方式中，所述第二端口集合对应第二参考信号序列
Figure PCTCN2022143215-appb-000051
所述第二参考信号序列
Figure PCTCN2022143215-appb-000052
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000053
满足下述关系：
Figure PCTCN2022143215-appb-000054
Figure PCTCN2022143215-appb-000055
k′＝0,1
c＝1,2
Figure PCTCN2022143215-appb-000056
n＝0,1,…
Figure PCTCN2022143215-appb-000057
其中，k是大于0的整数，l′为0或1，β为非零复数,w(k′),w(l′)分别为频域和时域掩码，c为1或2，表示参考信号端口的梳分能力，r(2n+k′)为基序列r映射在第k个子载波和第l个符号上的元素。
在一种可能的实现方式中，所述第二端口集合对应第二参考信号序列
Figure PCTCN2022143215-appb-000058
所述第二参考信号序列
Figure PCTCN2022143215-appb-000059
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000060
满足下述关系：
Figure PCTCN2022143215-appb-000061
Figure PCTCN2022143215-appb-000062
k′＝0,1
c＝1or 2
Figure PCTCN2022143215-appb-000063
n＝0,1,…
Figure PCTCN2022143215-appb-000064
其中，k是大于0的整数，l′为0或1，β为非零复数,w(k′),w(l′)分别为频域和时域掩码，c为1或2，表示参考信号端口的梳分能力，r(n)为基序列r映射在第k个子载波和第l个符号上的元素。
在一种可能的实现方式中，网络设备可以根据当前调度的总参考信号端口数目，灵活地选择使用本申请中描述的第一端口集合或第二端口集合，也就是通过指示信息指示所选择的端口。例如，当前的参考信号的配置为type1单符号，最大支持端口数为4，网络设备当前调度的总参考信号端口数目为6，可以对应选择第二端口集合中的端口。
第三方面，本申请提供了一种通信装置。该通信装置可用于实现上述第一方面或第一方面任意一种可能的设计所涉及的功能。该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，该硬件或软件包括一个或多个与上述第一方面及其任一设计中的功能或者方法步骤或者操作相对应的模块。具体的，该通信装置可以是终端设备或终端设备中的芯片。
在一种可能的示例中，该通信装置可包括通信模块(或称通信单元)以及处理模块(或称处理单元)。其中，通信模块可用于该通信装置进行通信，处理模块可用于该通信装置实现该通信装置的处理功能。
其中，通信模块可用于接收指示信息，所述指示信息用于指示端口属于第一端口集合或第二端口集合，第一端口集合对应N个第一时频资源组，第二端口集合对应M个第二时频资源组；所述N个第一时频资源组对应的时频资源不重合，所述M个第二时频资源组对应的时频资源不重合；至少一个第二时频资源组占用的时频资源是一个第一时频资源组占用的时频资源的子集；处理模块可用于根据所述指示信息确定参考信号对应的端口索引。
以上第一端口集合、第二端口集合、第一时频资源组和第二时频资源组等含义的描述和限定可参见在第一方面、第二方面或及其任意可能的实现方式中的相应描述。
第四方面，本申请提供了一种通信装置。该通信装置可用于实现上述第二方面或第二方面任意一种可能的设计所涉及的功能。该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，该硬件或软件包括一个或多个与上述第二方面及其任一设计中的功能或者方法步骤或者操作相对应的模块。具体的，该通信装置可以是网络设备或网络设备中的芯片。
在一种可能的示例中，该通信装置可包括通信模块(或称通信单元)以及处理模块(或称处理单元)。通信模块可用于该通信装置进行通信，处理模块可用于该通信装置实现该通信装置的处理功能。
其中，处理模块可用于确定指示信息，所述指示信息用于端口属于第一端口集合或第二端口集合，第一端口集合对应N个第一时频资源组，第二端口集合对应M个第二时频资源组；所述N个第一时频资源组对应的时频资源不重合，所述M个第二时频资源组对应的时频资源不重合；所述N个第一时频资源组与所述M个第二时频资源组占用的时频资源数量相同；至少一个第二时频资源组占用的时频资源是一个第一时频资源组占用的时频资源的子集；通信模块可用于发送指示信息。
以上第一端口集合、第二端口集合、第一时频资源组和第二时频资源组等含义的描述和限定可参见在第一方面、第二方面或及其任意可能的实现方式中的相应描述。
第五方面，本申请提供一种通信系统。示例性的，该通信系统可包括用于实现上述第一方面或第一方面任意一种可能的设计的通信装置，以及包括用于实现上述第二方面或第二方面任意一种可能的设计的通信装置。具体的，该通信系统可包括第三方面所述通信装置和/或第四方面所述通信装置。
第六方面，本申请提供了一种计算机存储介质，包括程序指令，当该程序指令在计算机上运用时，使得计算机执行上述第一方面或第一方面任意一种可能的设计，或上述第二方面或第二方面任意一种可能的设计中的方法。
第七方面，本申请实施例提供一种计算机程序产品，当其在计算机上运行时，使得计算机执行上述第一方面或第一方面任意一种可能的设计，或上述第二方面或第二方面任意一种可能的设计中的方法。
第八方面，本申请实施例提供一种芯片系统，该芯片系统可以包括处理器，还可以包括存储器(或者该系统芯片与储存器耦合)，该芯片系统执行储存器中的程序指令，以执行上述第一方面或第一方面任意一种可能的设计，或上述第二方面或第二方面任意一种可能的设计中的方法。其中，“耦合”是指两个部件彼此直接或间接地结合，如耦合可以是指两个部件之间电连接。
以上第二至第八方面所示方法的有益效果，可参照第一方面中相应方法的有益效果，这里为节省篇幅不再具体展开。
附图说明
图1为本申请实施例提供的一种通信系统的架构示意图；
图2为一种DMRS资源映射图样的示意图；
图3为本申请实施例提供的一种参考信号序列与资源块关系的逻辑示意图；
图4为一种DMRS发送方法的流程示意图；
图5为本申请实施例提供的一种通信方法的流程示意图；
图6为本申请实施例提供的一种DMRS资源映射图样的示意图；
图7为本申请实施例提供的另一种DMRS资源映射图样的示意图；
图8为本申请实施例提供的另一种DMRS资源映射图样的示意图；
图9为本申请实施例提供的另一种DMRS资源映射图样的示意图；
图10为本申请实施例提供的另一种通信方法的流程示意图；
图11为本申请实施例提供的另一种通信方法的流程示意图；
图12为本申请实施例提供的一种通信装置的结构示意图；
图13为本申请实施例提供的另一种通信装置的结构示意图。
具体实施方式
为了提高数据传输流数，本申请提供一种通信方法。下面将结合附图对本申请作进一步地详细描述。应理解，下面所介绍的方法实施例中的具体操作方法也可以应用于装置实施例或系统实施例中。
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例提及的无线通信系统包括但不限于：全球移动通信(global system of mobile communication，GSM)系统、码分多址(code division multiple access，CDMA)系统、宽带码分多址(wideband code division multiple access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(long term evolution，LTE)系统、先进的长期演进(LTE-advanced，LTE-A)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统、5G、多种接入系统的融合系统，或演进系统、5G移动通信系统的三大应用场景增强移动宽带(enhanced mobile broadband，eMBB)，超可靠低时延通信(ultra reliable and low-latency communication，URLLC)和增强机器类通信(enhanced machine type communication，eMTC)或者将来出现的新的通信系统。
本申请实施例中涉及的网络设备可以是任意一种具有无线收发功能的设备或可设置于该设备的芯片，该设备包括但不限于：演进型节点B(evolved node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，家庭演进型节点B(home evolved NodeB)，或家庭节点B(home node B，HNB))、基带单元(base band unit，BBU)，无线保真(wireless fidelity，WIFI)系统中的接入点(access point，AP)、无线中继节点、无线回传节点、传输点(transmission point，TP)或者发送接收点(transmission and reception point，TRP/TP)或者远程射频头(remote radio head，RRH)等，还可以为5G，如，NR系统中的gNB，或，传输点，5G系统中的基站的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成gNB或传输点的网络节点，如基带单元，或，分布式单元(distributed unit，DU)等。
在一些部署中，gNB可以包括集中式单元(centralized unit，CU)和DU。gNB还可以包括有源天线单元(active antenna unit，AAU)。CU实现gNB的部分功能，DU实现gNB的部分功能。比如，CU负责处理非实时协议和服务，实现无线资源控制(radio resource control，RRC)，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能。DU负责处理物理层协议和实时服务，实现无线链路控制(radio link control，RLC)层、媒体接入控制(media access control，MAC)层和物理(physical，PHY)层的功能。AAU实现部分物理层处理功能、射频处理及有源天线的相关功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令，也可以认为是由DU发送的，或者，由DU+AAU发送的。可以理解的是，网络设备可以为包括CU节点、DU节点、AAU节点中一项或多项的设备。此外，可以将CU划分为接入网(radio access network，RAN)中的网络设备，也可以将CU划分为核心网(core network，CN)中的网络设备，本申请对此不做限定。
示例地，网络设备可以作为调度设备，在该情况下，网络设备例如可以包含但不限于：LTE基站eNB、NR基站gNB、运营商等等，其功能例如可以包含：进行上下行资源的配置、在基站调度模式、发送下行控制信息(downlink control information，DCI)。示例地，网络设备还可以作为发送设备，在该情况下，网络设备例如可以包含但不限于：TRP、RRH，其功能例如可以包含：进行下行信号发送和上行信号接收。
本申请实施例中涉及的终端设备也可以称为用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。本申请的实施例中的终端设备可以是手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑、可穿戴设备、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。本申请的实施例对应用场景不做限定。本申请中将前述终端设备及可设置于前述终端设备的芯片统称为终端设备。
其中，终端设备的功能例如可以包括但不限于：进行下行/侧行信号的接收，和/或，上行/侧行信号的发送。
本申请以物理下行链路控制信道PDCCH为例进行下行链路控制信道的描述，以物理下行链路共享信道PDSCH为例进行下行链路数据信道的描述，以载波为例进行频域单元的描述，以时隙为例进行5G系统中的时间单元的描述，本申请中涉及的时隙还可以是传输时间间隔TTI和/或时间单元和/或子帧和/或迷你时隙。
图1是使用本申请的传输信息的通信系统的示意图。如图1所示，该通信系统100包括网络设备102，网络设备102可包括多个天线例如，天线104、106、108、110、112和114。另外，网络设备102可附加地包括发射机链和接收机链，本领域普通技术人员可以理解，它们均可包括与信号发送和接收相关的多个部件(例如处理器、调制器、复用器、解调器、解复用器或天线等)。
网络设备102可以与多个终端设备(例如终端设备116和终端设备122)通信。然而，可以理解，网络设备102可以与类似于终端设备116或122的任意数目的终端设备通信。终端设备116和122可以是例如蜂窝电话、智能电话、便携式电脑、手持通信设备、手持计算设备、卫星无线电装置、全球定位系统、PDA和/或用于在无线通信系统100上通信的任意其它适合设备。
如图1所示，终端设备116与天线112和114通信，其中天线112和114通过前向链路118向终端设备116发送信息，并通过反向链路120从终端设备116接收信息。此外，终端设备122与天线104和106通信，其中天线104和106通过前向链路124向终端设备122发送信息，并通过反向链路126从终端设备122接收信息。
例如，在频分双工系统中，例如，前向链路118可与反向链路120使用不同的频带，前向链路124可与反向链路126使用不同的频带。
再例如，在时分双工系统和全双工(full duplex)系统中，前向链路118和反向链路120可使用共同频带，前向链路124和反向链路126可使用共同频带。
被设计用于通信的每个天线(或者由多个天线组成的天线组)和/或区域称为网络设备102的扇区。例如，可将天线组设计为与网络设备102覆盖区域的扇区中的终端设备通信。在网络设备102通过前向链路118和124分别与终端设备116和122进行通信的过程中，网络设备102的发射天线可利用波束成形来改善前向链路118和124的信噪比。此外，与网络设备通过单个天线向它所有的终端设备发送信号的方式相比，在网络设备102利用波束成形向相关覆盖区域中随机分散的终端设备116和122发送信号时，相邻小区中的移动 设备会受到较少的干扰。
在给定时间，网络设备102、终端设备116或终端设备122可以是无线通信发送装置和/或无线通信接收装置。当发送数据时，无线通信发送装置可对数据进行编码以用于传输。具体地，无线通信发送装置可获取(例如生成、从其它通信装置接收、或在存储器中保存等)要通过信道发送至无线通信接收装置的一定数目的数据比特。这种数据比特可包含在数据的传输块(或多个传输块)中，传输块可被分段以产生多个码块。
此外，该通信系统100可以是公共陆地移动网络(public land mobile network，PLMN)网络或者D2D网络或者M2M网络或者其他网络，图1只是举例的简化示意图，网络中还可以包括其他网络设备，图1中未予以画出。
需要说明的是，在本申请实施例中，发送设备可以是上述网络设备102也可以是终端设备(例如，终端设备116或终端设备122)，相对应的，接收端设备可以是上述终端设备(例如，终端设备116或终端设备122)，也可以是网络设备102，本申请并未特别限定。
可以理解的是，本申请实施例中以DMRS为例进行信号传输的陈述，其他适用于本申请实施例的信号类型均在本申请保护范围内，本申请并未特别限定。
为便于理解本申请实施例，下面首先对本申请中涉及的术语及背景做简单介绍。
1、天线端口(antenna port)
天线端口简称端口。可以理解为被接收端所识别的发射天线，或者在空间上可以区分的发射天线。针对每个虚拟天线可以配置一个天线端口，每个虚拟天线可以为多个物理天线的加权组合。根据所承载的信号的不同，天线端口可以分为参考信号端口和数据端口。其中，参考信号端口例如包括但不限于，解调参考信号(demodulation reference signal，DMRS)端口、信道状态信息参考信号(channel state information reference signal，CSI-RS)端口等。
本申请中包括现有端口和新增端口，现有端口指的是现有协议中的端口，或支持现有协议中技术方案的端口；新增端口指的是能够支持本申请技术方案的端口。
2、时频资源
在本申请实施例中，数据或信息可以通过时频资源来承载，其中，该时频资源可以包括时域上的资源和频域上的资源。其中，在时域上，时频资源可以包括一个或多个时域单元(或者，也可以称为时间单元、时间单位)，在频域上，时频资源可以包括一个或多个频域单元。
其中，一个时域单元可以是一个符号或者几个符号(如正交频分复用(orthogonal frequency division multiplexing，OFDM)符号)，或者一个迷你时隙(mini-slot)，或者一个时隙(slot)，或者一个子帧(subframe)，其中，一个子帧在时域上的持续时间可以是1毫秒(ms)，一个时隙由7个或者14个符号组成，一个迷你时隙可以包括至少一个符号(例如，2个符号或7个符号或者14个符号，或者小于等于14个符号的任意数目符号)。列举的上述时域单元大小仅仅是为了方便理解本申请的方案，不对本申请实施例的保护范围造成限定，可以理解的是，上述时域单元大小可以为其它值，本申请不做限定。
一个频域单元可以是一个资源块(resource block，RB)，或者一个子载波(subcarrier)，或者一个资源块组(resource block group，RBG)，或者一个预定义的子带(subband)，或者一个预编码资源块组(precoding resource block group，PRG)，或者一个带宽部分(bandwidth part，BWP)，或者一个资源元素(resource element，RE)(或资源粒子)，或者一个载波，或者一个服务小区。
在本申请实施例中提及的传输单元可以包括以下任意一项：时域单元、频域单元、或时频单元，例如，本申请实施例中提及的传输单元可以替换为时域单元，也可以替换为频域单元，也可以替换成时频单元。又如，传输单元还可以替换为传输时机。其中，时域单元可以包括一个或者多个OFDM符号，或者，时域单元可以包括一个或者多个slot，等等。频域单元可以包括一个或者多个RB，或者，频域单元可以包括一个或者多个子载波，等等。
3、空间层
对于空间复用多输入多输出MIMO系统，在相同时频资源上可以同时传输多路并行数据流，每一路数据流称为一个空间层或空间流。
4、DMRS
DMRS用于估计数据信道(如PDSCH)或控制信道(如PDCCH)经历的等效信道矩阵，从而用于数据的检测和解调。以数据信道PDSCH为例，DMRS通常与发送的数据信号进行相同的预编码，从而保证DMRS与数据经历相同的等效信道。假设发送端发送的DMRS向量为s，发送的数据符号向量为x，DMRS与数据进行相同的预编码操作(乘以相同的预编码矩阵P)，接收端相应的接收信号向量可以表示为：
数据：
Figure PCTCN2022143215-appb-000065
DMRS：
Figure PCTCN2022143215-appb-000066
对于数据信号和参考信号，经历的等效信道均为
Figure PCTCN2022143215-appb-000067
接收端基于已知的DMRS向量s，利用信道估计算法(如最小二乘(least squares，LS)法信道估计，最小均方误差(minimum mean squared error，MMSE)信道估计等)可以获得对等效信道
Figure PCTCN2022143215-appb-000068
的估计。基于等效信道可以完成数据信号的MIMO均衡和后续解调。
由于DMRS用于估计等效信道
Figure PCTCN2022143215-appb-000069
其维度为N R×R，其中N R为接收天线数目，R为传输流数(rank)。通常来说，一个DMRS端口与一个空间层相对应。对于传输流数为R的MIMO传输，需要的DMRS端口数目为R。为了保证信道估计的质量，通常不同DMRS端口为正交端口。不同DMRS端口对应的DMRS符号在频域、时频或码域正交。目前5G NR支持2种DMRS资源映射类型。对于类型1(或称配置类型1)DMRS，最大可支持8个正交端口；对于类型2(或称配置类型2)DMRS，最大可支持12个正交端口。因此，目前NR最大仅能支持12流的MIMO传输。
DMRS是接收端进行检测的重要参考信号。DMRS与传输的数据信道(如PDSCH)一同发送。NR DMRS端口为正交DMRS端口，即不同DMRS端口对应的DMRS符号是频分复用和/或码分复用的。对于一个DMRS端口，为了对不同的时频资源进行信道估计，保证信道估计质量，需要在多个时频资源内发送多个DMRS符号。
下面，结合图4，对本申请实施例的DMRS的收发方法进行详细说明。
需要说明的是，在本申请实施例中，发送设备(例如，第一发送设备)可以是网络设备(例如，接入网设备)也可以是终端设备，本申请并未特别限定，当发送设备为网络设备时，可以执行以下描述中网络设备执行的动作；当发送设备为终端设备时，可以执行以下描述中终端设备执行的动作。
类似地，接收设备(例如，第一接收设备)可以是网络设备(例如，接入网设备)也可以是终端设备，本申请并未特别限定，当接收设备为网络设备时，可以执行以下描述中网络设备执行的动作；当接收设备为终端设备时，可以执行以下描述中终端设备执行的动 作。
图4示出了一种参考信号的收发方法200的示意性交互图。如图4所示，在S010，发送设备#A(即，第一发送设备的一例)确定参考信号#A的天线端口#A。在S020，发送设备#A确定(或生成)参考信号#A(如DMRS#A)(即，第一DMRS的一例)。其中，该生成DMRS#A的过程可以与现有技术相似，这里为了避免赘述，省略其详细说明。
应理解，图4中所示的步骤作为一种示例而非限定。
需要说明的是，在本申请实施例中，该DMRS#A为类型#A(即，第一类型的一例)的DMRS。
其后，发送设备#A可以确定DMRS#A的天线端口，以下，为了便于理解和区分，记做：天线端口#A。需要说明的是，天线端口#A仅用于和DMRS#A对应，并不限定天线端口的个数，即天线端口#A可以表示一个或多个天线端口。
作为示例而非限定，在本申请实施例中，DMRS的天线端口可以是网络设备确定并通过RRC信令或MAC信令或物理层信令(如DCI信令等)等方式下发给终端设备的。因此，当发送设备#A为网络设备时，该发送设备#A可以自行确定该天线端口#A；当发送设备#A为终端设备时，该发送设备#A可以根据其所接入的网络设备的指示，确定该天线端口#A。
需要说明的是，该天线端口#A是发送设备#A能够支持的天线端口，包括现有端口和新增端口。对于新增端口，UE可以上报支持新增端口的能力，网络设备可以基于上报的能力为UE分配端口。
在一个可能的实施方式中，该第一DMRS的天线端口是从该发送设备支持的所有天线端口中确定的。
在本申请实施例中，发送设备能够支持多个天线端口，具体地说，是能够支持通过多个天线端口的每个天线端口发送信号(例如，DMRS)。
在现有技术中，每种类型的DMRS仅能通过该种类型的DMRS对应的天线端口进行发送。DMRS的天线端口可以与天线端口索引对应，DMRS对应的天线端口可以是0，1，2，…...，11，或者可以是1000，1001，1002，…...，1011。或者DMRS对应的天线端口索引可以是0，1，2，…...，11，或者DMRS对应的天线端口索引可以是1000，1001，1002，…...，1011。
与此相对，在本申请实施例中，每种类型的DMRS均能够通过发送设备所支持的所有天线端口中的任一个天线端口进行发送。
即，在本申请实施例中，配置图案(或称图样)中的天线端口可以不与DMRS的类型进行绑定，或者说，每种类型的DMRS均可以通过配置图案中的任一天线端口发送。
应理解，配置图案可以是表征序列元素和时频资源映射的规则的公式、表格或者图示，本申请对此不作限定。还应理解，配置图案可以是网络设备指示的，也可以是预定义的，本申请对此不作限定。
作为示例而非限定，例如，假设配置图案可以包括天线端口索引为a至h的8个天线端口中每个天线端口对应的时频资源，发送设备#A可以支持配置图案中的所有天线端口。发送设备#A可以在一个时间段内使用天线端口a和b发送DMRS#A，在另一个时间段内使用天线端口e和f发送DMRS#A。
进一步的，如果发送设备#A是网络设备，发送设备#A可以通过RRC信令或MAC信 令或物理层信令等方式将DMRS#A使用的天线端口索引和/或天线端口个数通知给接收设备。
如果发送设备#A是终端设备，发送设备#A可以通过接收RRC信令或MAC信令或物理层信令等方式确定DMRS#A使用的天线端口索引和/或天线端口个数，其中，DMRS#A使用的天线端口索引和/或天线端口个数是网络设备确定并通知给终端设备的。需要说明的是，终端设备可以提前将该设备可以支持的最大天线端口个数或最大层数上报给网络设备，以使网络设备能确定该终端设备可支持的天线端口或天线端口个数。
并且，在S010中，该DMRS#A的接收设备(即，第一接收设备的一例，以下，为了便于理解和说明，称为：接收设备#A)可以确定该天线端口#A，并且，接收设备#A确定该天线端口#A的过程可以与发送设备#A确定天线端口#A的过程相似，即，当接收设备#A为网络设备时，该接收设备#A可以自行确定该天线端口#A；当接收设备#A为终端设备时，该接收设备#A可以根据其所接入的网络设备的指示，确定该天线端口#A。
在S030，发送设备#A可以基于该天线端口#A，确定配置图案，从而确定与该天线端口#A对应的时频资源(以下，为了便于理解和说明，记做：时频资源#A)，将DMRS#A映射到时频资源#A上，并通过天线端口#A将该DMRS#A发送出去。
需要说明的是，如上所述，系统时频资源(或者说，配置图案包括的时频资源)可以被划分为多个基本的时频资源单元(例如，一个或多个RB或者一个或多个RE)，该时频资源#A可以位于系统时频资源中的全部基本时频资源单元上，也可以位于系统时频资源中的部分基本时频资源单元上，例如，该时频资源#A位于系统时频资源中的一个RB或多个RB上，本申请并未特别限定。
并且，在本申请实施例中，存在该时频资源#A的全部或部分时频资源(例如，全部或部分RE)上除了该DMRS#A以外，还承载有其他的一个或多个DMRS(例如，后述DMRS#B和/或DMRS#C)，以下，为了便于理解和区分，将时频资源#A上承载有至少两种类型的DMRS的部分或全部时频资源记做：时频资源#A1。
此情况下，该DMRS#A与该其他的一个或多个DMRS可以采用例如，码分复用方式，复用该时频资源#A1。
从而，在本申请实施例中，发送设备#A可以确定DMRS#A所对应的码资源(例如，码分复用(code division multiplexing，CDM)码，以下，为了便于理解和区分，记做：码资源#A)。其中，“DMRS#A所对应的码资源”可以理解为DMRS#A是基于该码资源#A复用在时频资源#A1上的。
作为示例而非限定，在本申请实施例中，可以基于码资源的长度，确定复用在同一时频资源上的最大的DMRS端口的数量，例如，如果码资源的长度为4，则最大可以支持4个DMRS复用在同一时频资源中，如果码资源的长度为8，则可以支持8个DMRS复用在同一时频资源中。
另外，在本申请实施例中，每个DMRS对应的码资源可以是网络设备(可以作为DMRS的发送设备或接收设备)确定并通知终端设备(可以作为DMRS的发送设备或接收设备)的。或者，每个DMRS对应的码资源可以是预设的，且每个DMRS对应的码资源与DMRS端口索引相对应。
再例如，在本申请实施例中，每个类型DMRS对应的码资源可以由通信系统或通信协议规定，从而，可以根据实际发送的DMRS的类型，和或实际发送的DMRS对应的端口 索引确定该DMRS所对应的码资源。
应理解，以上列举的确定码资源的方法仅为示例性说明，本申请并未限定于此，本申请实施例的码资源的确定方法也可以与现有技术相似，这里，为了避免赘述，省略其详细说明。
其中，该码资源#A与承载于时频资源#A1上的其他DMRS(例如，后述DMRS#B和/或DMRS#C)所对应的码资源(例如，CDM码)正交。从而，发送设备#A还可以基于码资源#A将DMRS#A复用于时频资源#A1上。
并且，在S030中，接收设备#A可以基于该天线端口#A，确定配置图案，从而确定与该天线端口#A对应的时频资源#A，并通过时频资源#A接收该DMRS#A，并且，接收设备#A确定时频资源#A的过程可以与发送设备#A确定时频资源#A的过程相似，这里，为了避免赘述省略其详细说明。
另外，接收设备#A还可以确定码资源#A，并基于码资源#A从时频资源#A1上获取DMRS#A，并且，接收设备#A确定码资源#A的过程可以与发送设备#A确定码资源#A的过程相似，这里，为了避免赘述省略其详细说明。
需要说明的是，如果时频资源#A1上使用了码资源#A，时频资源#A中除时频资源#A1外的其他时频资源上也可以使用相同的码资源#A。
应理解，本申请中的序列可以用于DMRS，也可以用于其他参考信号，如CSI-RS，CRS，SRS等，本申请对此不作限定。
DMRS在时域上可以占用至少1个OFDM符号，在频域上占用的带宽与调度的数据信号的调度带宽相同。一个端口对应的多个DMRS符号对应一个DMRS基序列，一个DMRS基序列包括多个DMRS基序列元素。以现有端口对应的DMRS基序列为例，DMRS基序列中第n个元素可以通过下式生成：
基于gold序列生成的DMRS基序列r(n)可以满足以下公式:
Figure PCTCN2022143215-appb-000070
其中，c(n)为伪随机序列，生成公式为：
Figure PCTCN2022143215-appb-000071
其中，N C＝1600，x 1(n)可以初始化为x 1(0)＝1,x 1(n)＝0,n＝1,2,...,30，x 2(n)的初始化满足：
Figure PCTCN2022143215-appb-000072
c init定义为以下形式：
Figure PCTCN2022143215-appb-000073
其中，l为一个时隙内的OFDM符号索引，
Figure PCTCN2022143215-appb-000074
为一个系统帧内的时隙索引，
Figure PCTCN2022143215-appb-000075
为一个时隙内的OFDM符号数，N ID 0,N ID 1∈{0,1,2,3,4,5,6……}，取值均为整数，可以由高层信令进行配置。
Figure PCTCN2022143215-appb-000076
与小区标识(identification，ID)有关，通常可以等于小区ID。
Figure PCTCN2022143215-appb-000077
为初始化参数，取值可以为0或1。λ表示DMRS端口对应的CDM组(CDM group)索引。
本申请实施例中，OFDM符号也可以简称为符号，如果没有特别说明，下文中的符号 指OFDM符号。
一个端口对应的DMRS基序列与对应的掩码序列相乘后通过预设的时频资源映射规则映射到对应的时频资源上。在目前NR协议中，定义了2类DMRS配置方式，包括Type1DMRS和Type 2DMRS。
示例地，对于现有端口p，对应的DMRS基序列中第m个元素r(m)，按照如下规则映射至索引为(k,l) p,μ的资源粒子(resource element，RE)上。其中，索引为(k,l) p,μ的RE在时域上对应一个时隙内的索引为l的OFDM符号，在频域上对应索引为k的子载波，映射规则满足：
Figure PCTCN2022143215-appb-000078
p为DMRS端口的索引，
Figure PCTCN2022143215-appb-000079
是DMRS调制符号占用的起始OFDM符号的符号索引或参考OFDM符号的符号索引，w f(k′)为索引为k’的子载波对应的频域掩码序列元素，w t(l′)为索引为l’的OFDM符号对应的时域掩码序列元素。μ表示子载波间隔参数，
Figure PCTCN2022143215-appb-000080
为功率缩放因子，m＝2n+k′，Δ为子载波偏移因子。
本申请中，新增端口对应的参考信号序列
Figure PCTCN2022143215-appb-000081
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000082
满足下述关系：
Figure PCTCN2022143215-appb-000083
其中，k为0到K-1的整数，K为
Figure PCTCN2022143215-appb-000084
在频域上所占的子载波总数，l为0或1，β为非零复数，掩码序列w包括的元素的个数为I,i满足i＝k mod(I/2)+l·(I/2)或i＝(k mod(I/2))·2+l,r(k,l)为基序列r映射在第k个子载波和第l个符号上的元素，基序列r的产生方法可以如式(1)所示。c(t)为块序列，t满足t＝floor(k/(I/2))。
其中，A mod B表示模运算，用于表示A除以B所得的余数，也可以记为A％B或者mod(A,B)，floor(A)表示对A进行下取整操作，用于表示不大于A的最大整数。
其中，块序列中的每个元素对应一个长度为I的掩码序列构成的序列块，如式(5)所示，连续的I/2个子载波和2个OFDM符号对应的I个时频资源粒子均对应块序列中的一个元素。或者掩码序列w(i)包含的I个元素，均对应块序列中的一个元素。对于不同的序列块，对应块序列中的不同元素。这样可以保证多个序列块构成的长序列之间的互相关性较低，从而降低干扰。
配置类型1(Type 1DMRS)映射规则中，现有DMRS端口p对应的w f(k′)、w t(l′)以及Δ的取值可以根据表1确定。
表1：Type 1DMRS参数取值
Figure PCTCN2022143215-appb-000085
Figure PCTCN2022143215-appb-000086
应理解，表1只是用于举例说明，不作限定。
配置类型2(Type 2DMRS)映射规则中，现有DMRS端口p对应的w f(k′)、w t(l′)以及Δ的取值可以根据表2确定。
表2：Type 2DMRS参数取值
Figure PCTCN2022143215-appb-000087
应理解，表2只是用于举例说明，不作限定。
其中，λ为现有端口p所属的CDM group的索引，同一CDM group内的DMRS端口占用的时频资源相同。
按照式(4)，Type1DMRS时频资源映射方式如图2中的(a)所示。
对于单符号DMRS(对应l’＝0)，最大支持4端口，DMRS资源占据一个OFDM符号。4个DMRS端口分为2个码分复用组，其中CDM group 0包含port 0和port 1；CDM group1包含port 2和port 3。CDM group 0和CDM group 1频分复用(映射在不同的频域资源上)。CDM group内包含的DMRS端口映射在相同的时频资源上。CDM group内包含的DMRS端口对应的参考信号序列通过掩码序列进行区分，从而保证了CDM group内DMRS端口的正交性，进而抑制了不同天线端口上传输的DMRS之间的干扰。
具体地，port 0和port 1位于相同的RE内，在频域以梳齿的方式进行资源映射。即port 0和port 1占用的相邻的频域资源之间间隔一个子载波。对于一个DMRS端口，占用的相邻的2个RE对应一个长度为2的掩码序列。例如，对于子载波0和子载波2，port 0和port 1采用一组长度为2的掩码序列(+1+1和+1-1)。类似的，port 2和port 3位于相同的RE内，在频域以梳齿的方式映射在port 0和port 1未占用的RE上。对于子载波1和子载波3，port 2和port 3采用一组长度为2的掩码序列(+1+1和+1-1)。
应理解，本申请表格中的p为端口索引，端口索引为1000的端口可以是port 0或者端口0，端口索引为1001的端口可以是port 1或者端口1，……，端口索引为100X的端口可以是port X或者端口X。
对于双符号DMRS(对应l’＝0或1)，最大支持8端口，DMRS资源占据两个OFDM符号。8个DMRS端口分为2个CDM group，其中CDM group 0包含port 0、port 1、port 4和port 5；CDM group 1包含port 2、port 3、port 6和port 7。CDM group 0和CDM group 1是频分复用。CDM group内包含的DMRS端口映射在相同的时频资源上。CDM group内 包含的DMRS端口对应的参考信号序列通过掩码序列进行区分。
具体地，port 0、port 1、port 4和port 5位于相同的RE内，在频域以梳齿的方式进行资源映射，即port 0、port 1、port 4和port 5占用的相邻的频域资源之间间隔一个子载波。对于一个DMRS端口，占用的相邻的2个子载波和2个OFDM符号对应一个长度为4的掩码序列。例如，对于OFDM符号0和OFDM符号1对应的子载波0和子载波2，port 0、port 1、port 4和port 5采用一组长度为4的掩码序列(+1+1+1+1/+1+1-1-1/+1-1+1-1/+1-1-1+1)。类似的，port 2、port 3、port 6和port 7位于相同的RE内，在频域以梳齿的方式映射在port 0、port 1、port 4和port 5未占用的子载波上。对于OFDM符号0和OFDM符号1对应的子载波1和子载波3，port 2、port 3、port 6和port 7采用一组长度为4的掩码序列(+1+1+1+1/+1+1-1-1/+1-1+1-1/+1-1-1+1)。
对于Type 2DMRS，其时频资源映射方式如图2中的(b)所示。
对于单符号DMRS，最大支持6端口,DMRS资源占据一个OFDM符号。6个DMRS端口分为3个CDM group，其中CDM group 0包含port 0和port 1；CDM group 1包含port2和port 3；CDM group 2包含port 4和port 5。CDM group间是频分复用，CDM group内包含的DMRS端口所对应的DMRS映射在相同的时频资源上。CDM group内包含的DMRS端口对应的参考信号序列通过掩码序列进行区分。对于一个DMRS端口，其对应的DMRS参考信号在频域映射在多个包含连续2个子载波的资源子块内，相邻的所述资源子块之间在频域间隔4个子载波。
具体地，port 0和port 1位于相同的RE内，在频域以梳齿的方式进行资源映射。以频域资源粒度为1RB为例，port 0和port 1占用子载波0、子载波1、子载波6和子载波7。port 2和port 3占用子载波2、子载波3、子载波8和子载波9。port 4和port 5占用子载波4、子载波5、子载波10和子载波11。对于一个CDM组内包含的2个DMRS端口，其在相邻的2个子载波内对应长度为2的掩码序列(+1+1和+1-1)。
对于双符号DMRS，最大支持12端口，DMRS资源占据两个OFDM符号。12个DMRS端口分为3个CDM group，其中CDM group 0包含port 0、port 1、port 6和port 7；CDM group1包含port 2、port 3、port 8和port 9；CDM group 2包含port 4、port 5、port 10和port 11。CDM group间是频分复用，CDM group内包含的DMRS端口所对应的DMRS映射在相同的时频资源上。CDM group内包含的DMRS端口对应的参考信号序列通过掩码序列进行区分。对于一个DMRS端口，其对应的DMRS参考信号在频域映射在多个包含连续2个子载波的资源子块内，相邻的所述资源子块之间在频域间隔4个子载波。
具体地，port 0、port 1、port 6和port 7位于相同的RE内，在频域以梳齿的方式进行资源映射。以频域资源粒度为1RB为例，port 0、port 1、port 6和port 7占用OFDM符号0和OFDM符号1对应的子载波0、子载波1、子载波6和子载波7。port 2、port 3、port 8和port 9占用OFDM符号1和OFDM符号2对应的子载波2、子载波3、子载波8和子载波9。port 4、port 5、port 10和port 11占用OFDM符号1和OFDM符号2对应的子载波4、子载波5、子载波10和子载波11。对于一个CDM组内包含的4个DMRS端口，其在2个OFDM符号对应的相邻的2个子载波内对应长度为4的掩码序列(+1+1+1+1/+1+1-1-1/+1-1+1-1/+1-1-1+1)。
下文结合附图，详细地描述本申请实施例的DMRS传输的方法。
应理解，本申请实施例以掩码序列为例作为表征传输数据的正交性的编码，其他适用 的编码也在本申请的保护范围之内，本申请对此不作限定。
本申请的一种实施例，发送端设备在同一资源上发送现有端口的参考信号(即，第一参考信号)和新增端口的参考信号(即，第二参考信号)，接收端设备在同一块资源上接收现有端口的参考信号和新增端口的参考信号，根据各参考信号对应的参考信号序列进行信道估计。
例如，对于Type 2DMRS，12个DMRS端口分为3个CDM组。对于每个DMRS端口，其时频资源映射的基本频域粒度为连续的6个子载波。连续的6个子载波和2个OFDM符号分为3个时频资源子块，每个时频资源子块包含连续的2个子载波和2个OFDM符号。3个时频资源子块是频分复用的。如图3所示，每个CDM组包含的4个DMRS端口对应的参考信号序列与长度为4的掩码序列相乘后映射在同一个资源子块包含的所有RE上。例如，对于DMRS端口1，在图3所示的12个RE构成的时频资源块中，占用连续2个子载波和2个OFDM符号对应的4个RE，对应长度为4的掩码序列为+1，-1，+1，-1。
随着未来无线通信设备部署更加密集，终端设备数目进一步增长，对MIMO传输流数提出了更高的需求。此外，随着后续大规模(massive)MIMO系统的不断演进，收发天线数目将进一步增加(例如网络设备发送天线数目支持128T或256T，终端接收天线数目8R，T表示发送端口，R表示接收端口)，信道信息获取将更加精准，可以进一步支持更高的传输流数以提升MIMO系统的频谱效率。这势必需要更多的DMRS端口来支撑更高的传输流数(大于12流)，因此，需要对目前的DMRS端口配置方式进行改进来支持更高的传输流数。
为了提高系统支持的传输流数，本申请实施例提供一种通信方法。该通信方法可由终端装置和网络设备执行。其中，终端装置例如图1所示终端设备101，网络设备例如图1所示网络设备102。下文中以终端装置是UE，且网络设备是基站为例，对本申请实施例提供的通信方法进行说明。应理解，该方法可通过在参考信号的发送过程中对于端口的指示，扩展RRC消息所指示的端口数量，实现传输流数的增加。其中，参考信号包括但不限于DMRS，下文中在描述时主要以参考信号是DMRS为例进行说明，根据实际需求可将DMRS替换为其他类型的参考信号。
如图5所示，本申请实施例提供的通信方法可包括以下步骤：
S101：基站发送指示信息(该指示信息在本申请中也可称为端口的指示信息或参考信号端口指示信息等)。该指示信息可用于指示端口，其中，该端口属于第一端口集合或第二端口集合。
其中，第一端口集合对应N个第一时频资源组，第二端口集合对应M个第二时频资源组。M和N为正整数，可选的，M大于N。可选的，N个第一时频资源组对应的时频资源不重合，例如，相同或不同的第一时频资源组占用的不同的时频资源的时域位置和/或频域位置不重合。同理，M个第二时频资源组对应的时频资源不重合。
本申请中，时频资源组可以是多个时频资源的集合，其中，多个时频资源在时域上可占用一个或多个符号，在频域上可占用一个或多个子载波。同一个时频资源组内，时频资源占用的符号数量相同且占用的子载波数量相同。示例性的，时频资源组可以对应一个CDM组。例如，一个第一时频资源组为一个CDM组，一个第二时频资源组为一个CDM组。
可选的在S101中，N个第一时频资源组占用的时频资源的数量与M个第二时频资源组占用的时频资源数量相同。例如，以时频资源是RE为例，N个第一时频资源组与M个第二 时频资源组可均包括12个RE。其中，每个第一时频资源组占用的RE数量可以相同或不同，每个第二时频资源组占用的RE数量可以相同或不同，任意一个第一时频资源组与任意一个第二时频资源组占用的RE数量可以相同或不同。
此外，至少一个第一时频资源组占用的时频资源的数量，可以与至少两个第二时频资源组占用的时频资源的数量相同。例如，以时频资源是RE为例，一个第一时频资源组可占用的6个RE，相应的，两个第二时频资源组占用的时频资源数量为6个，例如，一个时频资源组占用3个RE，另一个时频资源组占用另外的3个RE。
进一步可选的，N个第一时频资源组与M个第二时频资源组在同一个时隙内占用相同的OFDM符号。例如，N个第一时频资源组占用的RE，与M个第二时频资源组占用的RE，在时域上位于同一个OFDM符号。
此外可选的，在M个第二时频资源组中，至少一个第二时频资源组是N个第一时频资源组中的一个时频资源组的子集，例如，该第二时频资源组是该第一时频资源组的真子集。举例来说，至少一个时频资源组中的RE可构成至少两个第二时频资源组，或者说，至少一个第一时频资源组占用的时频资源(如RE)与至少两个第二时频资源组占用的时频资源相同。可选的，至少一个第一时频资源组占用的时间单元与至少两个第二时频资源组占用的时间单元相同，这里的时间单元例如时隙和/或一个时隙中的OFDM符号。
比如，在由一个第一时频资源组中的RE构成两个第二时频资源组，这两个第二时频资源组为第一时频资源组的真子集。如果两个第二时频资源组占用的时频资源的数量相同，则该第一时频资源组占用的时频资源数量是其中一个第二时频资源组占用的时频资源数量的两倍。或者，在由一个第一时频资源组a中的RE构成两个第二时频资源组a第二时频资源组b，且一个第一时频资源组b中的RE构成一个第二时频资源组c时，这第二时频资源组a和第二时频资源组b分别是第一时频资源组a的真子集，第二时频资源组b也可视为第一时频资源组b的子集。
另外，在M个第二时频资源组中，至少一个第二时频资源组在一个频域单元内占用的子载波是一个第一时频资源组的子集。例如，以频域单元是RB为例，一个RB可包括12个子载波，索引分别为0、1、2……11，一个第一时频资源组占用的子载波索引为0、2、4、6……10，相应的，一个第二时频资源组中的占用的子载波索引可以是0、4和8，和/或，一个第二时频资源组占用的子载波索引可以是2、6和10。
举例来说，以图2中编号a所示的单符号DMRS类型1配置为例，第一端口集合可以是端口0、端口1、端口2和端口3的集合，N个第一时频资源可对应于采用单符号的DMRS类型1时的CDM组0和CDM组1，即N＝2。相应的，第二端口集合可以是图6中编号a所示的端口0、端口1、端口4、端口5、端口6和端口7的集合，M个第二时频资源可对应于CDM组0、CDM组2和CDM组3，即M＝3。其中，图6中编号a所示的CDM组0与图2中编号a所示的单符号DMRS类型1配置中的CDM组0配置相同，图6中编号a所示的CDM组2包括的RE为RE1、RE5和RE9，CDM组3对应的端口为端口6和端口7，端口6和端口7对应于不同的OCC。CDM组3包括的RE为RE3、RE7和RE11，CDM组2对应的端口为端口4和端口5，端口4和端口5对应于不同的OCC。
或者，第二端口集合可包括图6中编号b所示的端口4、端口5、端口6、端口7、端口8、端口9、端口10和端口11，M个第二时频资源可对应于CDM组2、CDM组3、CDM组4和CDM组5，即M＝4。其中，CDM组2和CDM组3可参见图6中编号a所示的CDM组2和CDM组3的 描述。CDM组4包括的RE为RE0、RE4和RE8，CDM组4对应的端口为端口8和端口9，端口8和端口9对应于不同的OCC。CDM组5包括的RE为RE2、RE6和RE10，CDM组5对应的端口为端口10和端口11，端口10和端口11对应于不同的OCC。
S101中，端口的指示信息可用于指示参考信号对应的端口，以参考信号是DMRS为例，该指示信息可用于指示DMRS端口，例如，指示信息中可包括端口索引。
其中，基站可以在确定参考信号对应的端口属于第一端口集合或第二端口集合后，向UE发送该指示信息以指示该端口。
相应的，UE接收该端口的指示信息。
S102：UE根据指示信息确定参考信号对应的端口索引。
端口的指示信息包括但不限于端口索引。
UE还可根据该指示信息与第二时频资源组之间的对应关系，确定该端口索引对应的第二时频资源组。应理解，该对应关系可以是存储在UE中的，比如，通过预配置或协议定义的方式存储在UE中；或者，该对应关系可由基站或其他网络设备向UE指示，本申请不具体限定。
UE还可根据该端口索引发送参考信号。
基于图5所示流程，对于N个第一时频资源组占用的时频资源数量，UE不再限于在这些时频资源只能通过第一端口集合中的端口进行参考信号的接收或发送，也可以通过第二端口集合中的端口进行参考信号的接收或发送，其中，至少一个第二时频资源组占用的时频资源是一个第一时频资源组占用的时频资源的子集，因此第二端口集合可支持更多的时频资源组，因此指示第二端口集合进行参考信号的接收或发送可实现端口扩展。例如，当基站确定第一端口集合能够满足传输流数需求时，指示UE通过第一端口集合中的端口进行参考信号的接收或发送，当第一端口集合不能满足传输流数需求时，可通过指示信息指示第二端口集合中的端口，使得UE通过第二端口集合中的端口进行参考信号的接收或发送。
提升系统效率
一种可能的实现方式中，基站可通过配置信息将第一时频资源组和对应的第一端口集合指示给UE。此外，UE也可采用默认配置的方式确定第一时频资源组。
示例性的，当通过配置信息配置第一时频资源组(或配置第一端口集合)时，该配置信息可用于指示第一时频资源组对应的DMRS配置类型和/或DMRS符号数。例如，配置信息可用于指示采用单符号的DMRS类型1、双符号的DMRS类型1、单符号的DMRS类型2或者双符号的DMRS类型2中的一个。配置信息具体可以是承载于RRC消息的指示信息。
可选的，第一端口集合对应2个CDM组(或第一端口集合对应于2个第一时频资源组)，所述第二端口集合可对应3个或4个CDM组(或第二端口集合对应于3个或4个第二时频资源组，例如，第二端口集合可对应于图6或图7所示第二时频资源组)。或，所述第一端口集合对应3个CDM组(或第一端口集合对应于3个第一时频资源组)，所述第二端口集合对应4个、5个或6个CDM组(或第二端口集合对应于4个、5个或6个第二时频资源组，例如，第二端口集合可对应于图8或图9所示第二时频资源组)。
下面以第一端口集合对于的时频资源为DMRS类型1、双符号的DMRS类型1、单符号的DMRS类型2或者双符号的DMRS类型2中的一个为例，分别进行介绍。
(1)第一端口集合对应于单符号的DMRS类型1
如果配置信息指示采用图2中编号a所示的单符号的DMRS类型1，则N个第一时频资源 组可对应于CDM组0和CDM组1，相应的，M个第二时频资源组可对应于图6中编号a或编号b所示图样中的CDM组，如CDM组0、CDM组2和CDM组3，具体可参见前面的描述。
例如，图6示出了两种基于图2中编号a所示单符号DMRS资源映射图样进行端口扩展获得的图样，分别在图6中通过编号a和编号b进行区分，第二时频资源组可对应于编号a中的CDM组0、CDM组2和CDM组3，或对应于编号b所示的CDM组2至CDM组5中的一个，端口的指示信息可指示该第二时频资源组所对应的端口，例如当第二时频资源组对应于CDM组2时，该指示信息可包括端口索引4或5。
(2)第一端口集合对应于双符号的DMRS类型1
如果配置信息指示采用图2中编号a所示的双符号的类型1，则N个第一时频资源组可对应于CDM组0和CDM组1，相应的，M个第二时频资源组可对应于图7中编号a或编号b所示图样中的CDM组。
例如，图7示出了两种基于图2中编号a所示双符号图样进行端口扩展获得的图样，分别在图7中通过编号a和编号b进行区分，第二时频资源组可对应于编号a中的CDM组0、CDM组2或CDM组3，或包括编号b所示的CDM组2至CDM组5中的一个，端口的指示信息可指示该第二时频资源组所对应的端口，例如当第二时频资源组对应于CDM组2时，该指示信息可包括端口索引12至15中的任一项。
如图7中编号a和编号b所示，双符号的DMRS类型1配置下的CDM组3对应的RE为RE3、RE7和RE11，CDM组3对应的端口为端口12、端口13、端口14和端口15，端口12、端口13、端口14和端口15对应于不同的OCC，CDM组2包括的RE为RE1、RE5和RE9，CDM组2对应的端口为端口8、端口9、端口10和端口11，端口8、端口9、端口10和端口11对应于不同的OCC。如图7中编号b所示，CDM组5包括的RE为RE2、RE6和RE10，CDM组5对应的端口为端口20、端口21、端口22和端口23，端口20、端口21、端口22和端口23对应于不同的OCC，CDM组4包括的RE为RE0、RE4和RE8，CDM组4对应的端口为端口16、端口17、端口18和端口19，端口16、端口17、端口18和端口19对应于不同的OCC。
可选的，基站可在确定需要进行5至6流传输的情况下，从图7中编号a所示的CDM组0、CDM组2和CDM组3中确定该第二时频资源组，端口的指示信息可包括第二时频资源组所对应的端口的索引。或者，基站可在确定需要进行7至8流传输的情况下，从图7中编号b所示的CDM组2至CDM组5中确定该第二时频资源组，端口的指示信息可包括第二时频资源组所对应的端口的索引。
(3)第一端口集合对应于单符号的DMRS类型2
如果配置信息指示采用图2中编号b所示的单符号的DMRS类型2，则N个第一时频资源组可对应于CDM组0、CMD组1和CDM组2，相应的，M个第二时频资源组可对应于图8中编号a或编号b所示图样中的CDM组。
例如，图8示出了三种基于图2中编号b所示单符号类型1图样进行端口扩展获得的图样，分别在图8中通过编号a、编号b和编号c进行区分，第二时频资源组可对应于编号a中的CDM组0、CDM组1、CDM组3或CDM组4、编号b所示的CDM组0、CDM组3至CDM组6，或者编号c所示的CDM组3至CDM组8中的一个，端口的指示信息可指示该第二时频资源组所对应的端口，例如当第二时频资源组对应于CDM组3时，该指示信息可包括端口索引8-9中的任一项。
在图8中的编号a、编号b和编号c所示图样中，单符号的DMRS类型2配置下的CDM组4 包括的RE为RE5、RE11、RE17和RE23，CDM组4对应的端口为端口8和端口9，CDM组3包括的RE为RE4、RE10、RE16和RE22，CDM组3对应的端口为端口6和端口7。在图8中编号b和编号c所示图样中，CDM组6包括的RE为RE3、RE9、RE15(图8中未示出)和RE21(图8中未示出)，CDM组6对应的端口为端口12和端口13，CDM组5包括的RE为RE2、RE8、RE14(图8中未示出)和RE20(图8中未示出)，CDM组5对应的端口为端口10和端口11。在图8中的编号c所示图样中，CDM组8包括的RE为RE1、RE7、RE13(图8中未示出)和RE19(图8中未示出)，CDM组8对应的端口为端口16和端口17，CDM组7包括的RE为RE0、RE6、RE12(图8中未示出)和RE18(图8中未示出)，CDM组7对应的端口为端口14和端口15。
可选的，基站可在确定需要进行7至8流传输的情况下，从图8中编号a所示的CDM组3和CDM组4中确定该第二时频资源组，端口的指示信息可包括第二时频资源组所对应的端口的索引。或者，基站可在确定需要进行9至10流传输的情况下，从图8中编号b所示的CDM组3至CDM组6中确定该第二时频资源组，端口的指示信息可包括第二时频资源组所对应的端口的索引。或者，基站可在确定需要进行11至12流传输的情况下，从图8中编号c所示的CDM组3至CDM组8中确定该第二时频资源组，端口的指示信息可包括第二时频资源组所对应的端口的索引。
(4)第一端口集合对应于双符号的DMRS类型2
如果配置信息指示采用图2中编号b所示的双符号的DMRS类型2，则N个第一时频资源组可对应于CDM组0、CMD组1和CDM组2，相应的，M个第二时频资源组可对应于图9中编号a或编号b所示图样中的CDM组，具体可参见前面的描述。
例如，图9示出了三种基于图2中编号b所示双符号类型2图样进行端口扩展获得的图样，分别在图9中通过编号a、编号b和编号c进行区分，第二时频资源组可对应于编号a中的CDM组0、CDM组1、CDM组3或CDM组4中的至少一个，或对应于编号b所示的CDM组0、CDM组3至CDM组6中的至少一个，或者对应于编号c所示的CDM组3至CDM组8中的至少一个，端口的指示信息可指示该第二时频资源组所对应的端口，例如当第二时频资源组对应于CDM组3时，该指示信息可包括端口索引16-19中的任一项。
在图9中编号a、编号b和编号c所示图样中，双符号的DMRS类型2配置下的CDM组4可包括的RE为RE5和RE11，CDM组4对应的端口为端口16、端口17、端口18和端口19，CDM组3包括的RE为RE4和RE10，CDM组3对应的端口为端口12、端口13、端口14和端口15。在图9中编号b和编号c所示图样中，CDM组6包括的RE为RE3和RE9，CDM组6对应的端口为端口24、端口25、端口26和端口27，CDM组5包括的RE为RE2和RE8，CDM组5对应的端口为端口20、端口21、端口22和端口23。在图9中编号c所示图样中，CDM组8包括的RE为RE1和RE7，CDM组8对应的端口为端口32、端口33、端口34和端口35，CDM组7包括的RE为RE0和RE6，CDM组7对应的端口为端口28、端口29、端口30和端口31。
可选的，基站可在确定需要进行13至16流传输的情况下，从图9中编号a所示的CDM组3和CDM组4中确定该第二时频资源组，端口的指示信息可包括第二时频资源组所对应的端口的索引。或者，基站可在确定需要进行17至20流传输的情况下，从图9中编号b所示的CDM组3至CDM组6中确定该第二时频资源组，端口的指示信息可包括第二时频资源组所对应的端口的索引。或者，基站可在确定需要进行21至24流传输的情况下，从图9中编号c所示的CDM组3至CDM组8中确定该第二时频资源组，端口的指示信息可包括第二时频资源组所 对应的端口的索引。
可选的，在第二端口集合中的端口对应梳齿4或梳齿6。本申请中，梳齿n是指将Q个子载波被分(如等分)为n份，每份中的子载波对应于相同的端口。例如图6中的编号b图样所示，RE0至RE11对应于CDM组2至CDM组5，即子载波被等分为4份，因此图6中的编号b所示图样中，第二端口集合中的端口对应于梳齿4；又如，如图8中的编号c图样所示，RE0至RE23对应于CDM组3至CDM组8，即子载波被等分为6份，因此图8中的编号c图样所示图样中，第二端口集合中的端口对应于梳齿4。
本申请中，M个第二时频资源组可以是对N个第一时频资源组进行拆分后获得的，由于经过拆分，M个第二时频资源组相比于N个第一时频资源组可支持更多端口，因此，对N个第一时频资源组进行拆分以获得M个第二时频资源组的过程也可称为端口扩展，或者可称为对第一时频资源组进行稀疏化。可选的，M个第二时频资源组中的时频资源等间隔分布，或者说，M个第二时频资源组中的至少一个可以由第一时频资源组等间隔分割得到，或者说，可按照等间隔分割方式，根据第一时频资源组获得至少一个第二时频资源组。具体的，可以对至少一个第一时频资源组进行等间隔拆分，获得至少两个第二时频资源组。
如果第一时频资源组为图2中编号a所示的单符号的DMRS类型1，则第二时频资源组可对应于对图2中编号a所示的单符号CDM组0或CDM组1进行拆分所获得的CDM组。例如，第二时频资源组可对应于图6中编号a所示图样包括的3个CDM组(每个CDM组对应于两个端口，即该图样支持的数据流数为6流)，3个CDM组分别为CDM组0、CDM组2和CDM组3。其中，CDM组2和CDM组3是根据图2中编号a所示的单符号CDM组1进行拆分获得的。CDM组0、CDM组2和CDM组3频分复用DMRS资源。可选的，基站可在确定需要进行5至6流传输的情况下，从图6中编号a所示的CDM组2和CDM组3中确定该第二时频资源组，端口的指示信息可包括第二时频资源组所对应的端口的索引。
或者，第二时频资源组可对应于图6中编号b所示图样包括的4个CDM组(每个CDM组对应于两个端口，即该图样支持的数据流数为8流)，4个CDM组分别为CDM组2、CDM组3、CDM组4和CDM组5。其中，CDM组2和CDM组3是根据图2中编号a所示的单符号类型1下的CDM组1进行拆分获得的，CDM组4和CDM组5是根据图2中编号a所示的单符号类型1下的CDM组0进行拆分获得的。CDM组2、CDM组3、CDM组4和CDM组5频分复用DMRS资源。可选的，基站可在确定需要进行7至8流传输的情况下，从图6中编号b所示的CDM组2至CDM组5中确定该第二时频资源组，端口的指示信息可包括第二时频资源组所对应的端口的索引。
如果第一时频资源组为图2中编号a所示的双符号的DMRS类型1，则第二时频资源组可对应于图2中编号a所示的双符号CDM组0或CDM组1进行拆分获得的。
例如，第二时频资源组可对应于图7中编号a所示图样包括的3个CDM组(每个CDM组对应于两个端口，即该图样支持的数据流数为6流)，3个CDM组分别为CDM组0、CDM组2和CDM组3。其中，CDM组2和CDM组3是根据图2中编号a所示的双符号CDM组1进行拆分获得的。CDM组0、CDM组2和CDM组3频分复用DMRS资源。
或者，第二时频资源组可对应于图7中编号b所示图样包括的4个CDM组(每个CDM组对应于两个端口，即该图样支持的数据流数为8流)，4个CDM组分别为CDM组2、CDM组3、CDM组4和CDM组5。其中，CDM组2和CDM组3是根据图2中编号a所示的双符号CDM组1进行拆分获得的，CDM组4和CDM组5是根据图2中编号a所示的双符号CDM组0进行拆分 获得的。CDM组2、CDM组3、CDM组4和CDM组5频分复用DMRS资源。
如果第一时频资源组为图2中编号b所示的单符号的DMRS类型2，则第二时频资源组可以是图2中编号b所示的CDM组0、CMD组1和CDM组2以外的其他时频资源组。
例如，第二时频资源组对应于图8中编号a所示图样中的4个CDM组(每个CDM组对应于两个端口，即该图样支持的数据流数为8流)，这4个CDM组分别为CDM组0、CDM组1、CDM组3和CDM组4，其中，CDM组3和CDM组4是根据图2中编号b所示单符号类型2图样中的CDM组2进行拆分获得的。CDM组0、CDM组1、CDM组3和CDM组4频分复用DMRS资源。
或者，第二时频资源组可对应于图8中编号b所示图样包括的5个CDM组(每个CDM组对应于两个端口，即该图样支持的数据流数为10流)，5个CDM组分别为CDM组0、CDM组3、CDM组4、CDM组5和CDM组6。其中，CDM组3、CDM组4是根据图2中编号b所示的单符号类型2图样中的CDM组2进行拆分获得的，CDM组5和CDM组6是根据图2中编号b所示的单符号类型2图样中的CDM组1进行拆分获得的。CDM组0、CDM组3、CDM组4、CDM组5和CDM组6频分复用DMRS资源。
或者，第二时频资源组可对应于图8中编号c所示图样包括的6个CDM组(每个CDM组对应于两个端口，即该图样支持的数据流数为12流)，6个CDM组分别为CDM组3、CDM组4、CDM组5、CDM组6、CDM组7和CDM组8，其中，CDM组3、CDM组4是根据图2中编号b所示的单符号类型2图样中的CDM组2进行拆分获得的，CDM组5和CDM组6是根据图2中编号b所示的单符号类型2图样中的CDM组1进行拆分获得的，CDM组7和CDM组8是根据图2中编号b所示的单符号类型2图样中的CDM组0进行拆分获得的。CDM组3、CDM组4、CDM组5、CDM组6、CDM组7和CDM组8频分复用DMRS资源。
如果第一时频资源组为图2中编号b所示的双符号类型2图样中的DMRS类型2，则第二时频资源组可对应于图2中编号b所示的双符号类型2图样中的CDM组0、CMD组1和CDM组2以外的其他时频资源组。
例如，第二时频资源组可对应于图9中编号a所示图样包括的4个CDM组(每个CDM组对应于两个端口，即该图样支持的数据流数为8流)，4个CDM组分别为CDM组0、CDM组1、CDM组3和CDM组4。其中，CDM组3和CDM组4是根据图2中编号b所示的双符号类型2图样中的CDM组2进行拆分获得的。CDM组0、CDM组1、CDM组3和CDM组4频分复用DMRS资源。
或者，第二时频资源组可对应于图9中编号b所示图样包括的5个CDM组(每个CDM组对应于两个端口，即该图样支持的数据流数为10流)，5个CDM组分别为CDM组0、CDM组3、CDM组4、CDM组5和CDM组6。其中，CDM组3、CDM组4是根据图2中编号b所示的双符号类型2图样中的CDM组2进行拆分获得的，CDM组5和CDM组6是根据图2中编号b所示的双符号类型2图样中的CDM组1进行拆分获得的。CDM组0、CDM组3、CDM组4、CDM组5和CDM组6频分复用DMRS资源。
或者，第二时频资源组可对应于图9中编号c所示图样包括的6个CDM组(每个CDM组对应于两个端口，即该图样支持的数据流数为12流)，6个CDM组分别为CDM组3、CDM组4、CDM组5、CDM组6、CDM组7和CDM组8。其中，CDM组3、CDM组4是根据图2中编号b所示的双符号类型2图样中的CDM组2进行拆分获得的，CDM组5和CDM组6是根据图2中编号b所示的双符号类型2图样中的CDM组1进行拆分获得的，CDM组7和CDM组8是根据 图2中编号b所示的双符号类型2图样中的CDM组0进行拆分获得的。CDM组3、CDM组4、CDM组5、CDM组6、CDM组7和CDM组8频分复用DMRS资源。
可选的，在对第一端口集合对应的第一时频资源组进行拆分时，可优先对对应的参考索引更大的第一时频资源组进行拆分。这里以对图2中编号a所示的单符号CDM组0和/或CDM组1进行拆分为例进行说明。可选的，可从CDM组0和CDM组1中，对应更大的端口索引的CDM组开始进行拆分，例如，在对图2中编号a所示的单符号CDM组0拆分之前，先对CDM组1进行拆分可获得两个第二时频资源组对应的CDM组，分别记对应于CDM组2和CDM组3，即对应于图6所示编号a中的图样。在对CDM组1拆分仍然不满足传输流数的需要时，可对CDM组0进行拆分，获得两个时频资源组对应的CDM组，分别记对应于CDM组4和CDM组5，即对应于图6所示编号b中的图样。
下面对确定本申请实施例中参考信号序列与时频资源之间的映射关系的进行介绍。
一种可能的实现方式中，假设本申请实施例中第一端口集合对应第一参考信号序列
Figure PCTCN2022143215-appb-000088
所述第一参考信号序列
Figure PCTCN2022143215-appb-000089
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000090
满足下述关系：
Figure PCTCN2022143215-appb-000091
Figure PCTCN2022143215-appb-000092
k′＝0,1
n＝0,1,…
Figure PCTCN2022143215-appb-000093
其中，k为大于0的正整数，l′为0或1，β为非零复数,w(k′),w(l′)分别为频域和时域掩码，r(2n+k′)为基序列r映射在第k个子载波和第l个符号上的元素。
在一种可能的实现方式中，所述第二端口集合对应第二参考信号序列
Figure PCTCN2022143215-appb-000094
所述第二参考信号序列
Figure PCTCN2022143215-appb-000095
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000096
满足下述关系：
Figure PCTCN2022143215-appb-000097
Figure PCTCN2022143215-appb-000098
k′＝0,1
n＝0,1,…
Figure PCTCN2022143215-appb-000099
其中，k为大于0的正整数，l′为0或1，β为非零复数,w(k′),w(l′)分别为频域和时域掩码，r(2n+k′)为基序列r映射在第k个子载波和第l个符号上的元素。
在一种可能的实现方式中，所述第二端口集合对应第二参考信号序列
Figure PCTCN2022143215-appb-000100
所述第二参考信号序列
Figure PCTCN2022143215-appb-000101
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000102
满足下述关系：
Figure PCTCN2022143215-appb-000103
Figure PCTCN2022143215-appb-000104
k′＝0,1
n＝0,1,…
Figure PCTCN2022143215-appb-000105
其中，k是大于0的整数，l′为0或1，β为非零复数,w(k′),w(l′)分别为频域和时域掩码，r(n)为基序列r映射在第k个子载波和第l个符号上的元素。
在一种可能的实现方式中，所述第二端口集合对应第二参考信号序列
Figure PCTCN2022143215-appb-000106
所述第二参考信号序列
Figure PCTCN2022143215-appb-000107
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000108
满足下述关系：
Figure PCTCN2022143215-appb-000109
Figure PCTCN2022143215-appb-000110
k′＝0,1
c＝1,2
Figure PCTCN2022143215-appb-000111
n＝0,1,…
Figure PCTCN2022143215-appb-000112
其中，k为大于0的正整数，l′为0或1，β为非零复数,w(k′),w(l′)分别为频域和时域掩码，c为1或2，表示参考信号端口的梳分能力，r(2n+k′)为基序列r映射在第k个子载波和第l个符号上的元素。
在一种可能的实现方式中，所述第二端口集合对应第二参考信号序列
Figure PCTCN2022143215-appb-000113
所述第二参考信号序列
Figure PCTCN2022143215-appb-000114
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000115
满足下述关系：
Figure PCTCN2022143215-appb-000116
Figure PCTCN2022143215-appb-000117
k′＝0,1
c＝1or 2
Figure PCTCN2022143215-appb-000118
n＝0,1,…
Figure PCTCN2022143215-appb-000119
其中，k是大于0的整数，l′为0或1，β为非零复数,w(k′),w(l′)分别为频域和时域掩码，c为1或2，表示参考信号端口的梳分能力，r(n)为基序列r映射在第k个子载波和第l个符号上的元素。
下面结合实施例介绍本申请所示通信方法的集中可能的实现方式。
实施例一：
当配置信息指示采用单符号的DMRS类型1时，可对图2中编号a所示的单符号图样进行拆分，获得图6中编号a所示图样。其中，如果基站通过指示信息指示端口4或端口5，则UE可确定第二时频资源组为图6中编号a所示图样中的CDM组2，如果端口的指示信息指示端口6或端口7，则UE可确定图6中编号a所示图样中的第二时频资源组对应于CDM组3。此外，如果端口的指示信息指示端口0或端口1，则UE可确定DMRS对应的时频资源组为图6中编号a所示图样中的CDM组0。因此，采用图6中编号a所示图样，可将单符号的DMRS类型1 配置下支持的最大端口数从4扩展至6，支持的最大数据流数从4流扩展至6流。
在拆分CDM组1获得图6中编号a所示的图样的基础上，如果仍然不能满足传输流数的要求，还可对图2中编号a所示的单符号CDM组0进行拆分，获得图6中编号b所示的DMRS资源映射图样。该配置支持4个CDM组(每个CDM组对应于两个端口，即支持的数据流数为8流)，分别为CDM组2、CDM组3、CDM组4和CDM组5。其中，CDM组2和CDM组3可参见对于图6中编号a的说明。CDM组4包括的RE为RE2、RE6和RE10，CDM组4对应的端口为端口10和端口11，端口10和端口11对应于不同的OCC。CDM组5包括的RE为RE0、RE4和RE8，CDM组5对应的端口为端口8和端口9，端口8和端口9对应于不同的OCC。
根据图6中编号b所示的DMRS资源映射图样，当配置信息指示采用单符号的DMRS类型1时，如果端口的指示信息指示端口4或端口5，则UE可确定第二时频资源组对应于CDM组2，如果端口的指示信息指示端口6或端口7，则UE可确定第二时频资源组对应于CDM组3，如果端口的指示信息指示端口10或端口11，则UE可确定第二时频资源组对应于CDM组4，如果端口的指示信息指示端口8或端口9，则UE可确定第二时频资源组对应于CDM组5。因此，采用图6中编号b所示图样，可将单符号的DMRS类型1配置下支持的最大端口数从4扩展至8，支持的最大数据流数从4流扩展至8流。
实施例二：
如果配置信息指示采用图2中编号a所示的双符号的DMRS类型1，则N个第一时频资源组可对应于CDM组0和CDM组1，第二时频资源组可以是对CDM组0和/或CDM组1拆分获得的时频资源资源。例如，拆分CDM组1获得的图样如图7中编号b所示，一个第二时频资源组占用的RE为RE3、RE7和RE11，该第二时频资源组对应的端口的指示信息可指示端口12、端口13、端口14或端口15。此外，另一个第二时频资源组占用的RE为RE1、RE5和RE9，该第二时频资源组对应的端口的指示信息可指示端口8、端口9、端口10或端口11。
在图7中编号a所示图样仍然不满足传输流数的要求的情况下，可进一步对CDM组0进行拆分，获得图7中编号b所示图样。该图样中，拆分CDM组0获得的一个第二时频资源组占用的RE为RE2、RE6和RE10，该第二时频资源组对应的端口的指示信息可指示端口20、端口21、端口22或端口23。拆分CDM组0获得的另一个第二时频资源组占用的RE为RE0、RE4和RE8，该第二时频资源组对应的端口的指示信息可指示端口16、端口17、端口18或端口19。
实施例三：
与实施例一和实施例二同理，如果配置信息指示采用图2中编号b所示的单符号类型2图样，则N个第一时频资源组可对应于CDM组0、CMD组1和CDM组2，M个第二时频资源组可以是图8所示编号a、b或c所示图样中的CDM组。
实施例四：
与实施例一致实施例三同理，如果配置信息指示采用图2中编号b所示的双符号类型2图样，则N个第一时频资源组可对应于CDM组0、CMD组1和CDM组2，M个第二时频资源组可以是图9所示编号a、b或c所示图样中的CDM组。
应理解，本申请图2所示图样，以及对图2所示图样进行拆分获得的图6至图9所示图样仅仅是示例性的说明，在实际应用中，以上各DMRS类型对应的资源映射图样可能有其他形式，比如，如果每个DMRS类型的配置下CDM组所包括的RE编号与图2相比有变化，则本申请实施例提供的方法(和本申请提供的图样)可进行相应调整，不再一一举 例。通过上述实施例提供的DMRS端口配置方式，网络设备可以实现根据当前调度的DMRS端口数目确定DMRS端口对应的时频资源及梳分程度，提高配对流数，提高系统效率和配置的灵活性，提高系统吞吐量，解决发送DMRS资源受限的问题。
下面通过实施例对本申请提供的通信方法在参考信号的上行和下行发送过程进行说明。
如图10所示，以网络设备和终端设备是执行主体为例，参考信号的下行发送过程可包括以下步骤：
S201：网络设备确定参考信号端口集合。
参考信号端口集合包含若干参考信号端口。其中，参考信号端口集合可包括本申请中描述的第一端口集合和第二端口集合。网络设备可以根据当前调度的总参考信号端口数目，灵活地选择使用本申请中描述的第一端口集合或第二端口集合。
S201中，网络设备还可确定参考信号端口集合中的端口对应的序列和时频资源映射。
一种可能的序列和时频资源之间的映射方式确定如下：
参考信号端口p对应参考信号序列
Figure PCTCN2022143215-appb-000120
参考信号序列
Figure PCTCN2022143215-appb-000121
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000122
满足下述关系：
Figure PCTCN2022143215-appb-000123
Figure PCTCN2022143215-appb-000124
k′＝0,1
c＝1,2
Figure PCTCN2022143215-appb-000125
n＝0,1,…
Figure PCTCN2022143215-appb-000126
其中，k∈0、1、2……K-1，K为
Figure PCTCN2022143215-appb-000127
在频域上所占的子载波总数，l′为0或1，β为功率系数，一般为非零复数,w(k′),w(l′)分别为频域和时域掩码，Δ为每个时频资源组对应的子载波偏移量，c为1或2(表征扩容能力系数)，具体取值如表3至表6中任一所示，k″为2或6(对应不同c有不同取值)，r(2n+k′)为基序列r映射在第k个子载波和第l个符号上的元素。
另一种可能的序列和时频资源之间的映射方式确定如下：
参考信号端口p对应参考信号序列
Figure PCTCN2022143215-appb-000128
参考信号序列
Figure PCTCN2022143215-appb-000129
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000130
满足下述关系：
Figure PCTCN2022143215-appb-000131
Figure PCTCN2022143215-appb-000132
k′＝0,1
c＝1,2
Figure PCTCN2022143215-appb-000133
n＝0,1,…
Figure PCTCN2022143215-appb-000134
其中，k∈0、1、2……K-1，K为
Figure PCTCN2022143215-appb-000135
在频域上所占的子载波总数，l′为0或1，β为功率系数，一般为非零复数,w(k′),w(l′)分别为频域和时域掩码，Δ为每个时频资源组对应的子载波偏移量，c为1或2(表征扩容能力系数)，具体取值如表3至表6中任一所示，k″为2或6(对应不同c有不同取值)，r(n)为基序列r映射在第k个子载波和第l个符号上的元素。
在表3至表6中，p＝1000+端口索引数值。其中，表3对应于对配置类型1单符号扩展获得的图样，如图6所示图样，表4对应于对配置类型1双符号扩展获得的图样，如图7所示图样。表5对应于对配置类型2单符号扩展获得的图样，如图8所示图样，表6对应于对配置类型2双符号扩展获得的图样，如图9所示图样。
表3
Figure PCTCN2022143215-appb-000136
表4
Figure PCTCN2022143215-appb-000137
Figure PCTCN2022143215-appb-000138
表5
Figure PCTCN2022143215-appb-000139
表6
Figure PCTCN2022143215-appb-000140
Figure PCTCN2022143215-appb-000141
另一种可能的序列和时频资源之间的映射方式确定如下：
参考信号端口p对应参考信号序列
Figure PCTCN2022143215-appb-000142
参考信号序列
Figure PCTCN2022143215-appb-000143
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000144
满足下述关系：
Figure PCTCN2022143215-appb-000145
Figure PCTCN2022143215-appb-000146
k′＝0,1
n＝0,1,…
Figure PCTCN2022143215-appb-000147
其中，k∈0、1、2……K-1，K为
Figure PCTCN2022143215-appb-000148
在频域上所占的子载波总数，l′为0或1，β为功率系数，一般为非零复数,w(k′),w(l′)分别为频域和时域掩码，Δ为每个时频资源组对应的子载波偏移量，c为1或2(表征扩容能力系数)，具体取值如表7至表10中任一所示，k″为2或6(对应不同c有不同取值)，r(n)为基序列r映射在第k个子载波和第l个符号上的元素。
另一种可能的序列和时频资源之间的映射方式确定如下：
参考信号端口p对应参考信号序列
Figure PCTCN2022143215-appb-000149
参考信号序列
Figure PCTCN2022143215-appb-000150
映射在第k个子载波和第l个符号上的元素
Figure PCTCN2022143215-appb-000151
满足下述关系：
Figure PCTCN2022143215-appb-000152
Figure PCTCN2022143215-appb-000153
k′＝0,1
n＝0,1,…
Figure PCTCN2022143215-appb-000154
其中，k∈0、1、2……K-1，K为
Figure PCTCN2022143215-appb-000155
在频域上所占的子载波总数，l′为0或1，β为功率系数，一般为非零复数,w(k′),w(l′)分别为频域和时域掩码，Δ为每个时频资源组对应的子载波偏移量，c为1或2(表征扩容能力系数)，具体取值如表7至表10中任一所示，k″为2或6(对应不同c有不同取值)，r(n)为基序列r映射在第k个子载波和第l个符号上的元素。
在表7至表10中，p＝1000+端口索引数值。其中，表7对应于对配置类型1单符号扩展获得的图样，如图6所示图样，表8对应于对配置类型1双符号扩展获得的图样，如图7所示图样。表9对应于对配置类型2单符号扩展获得的图样，如图8所示图样，表10对应于对配置类型2双符号扩展获得的图样，如图9所示图样。
表7
Figure PCTCN2022143215-appb-000156
Figure PCTCN2022143215-appb-000157
表8
Figure PCTCN2022143215-appb-000158
表9
Figure PCTCN2022143215-appb-000159
Figure PCTCN2022143215-appb-000160
表10
Figure PCTCN2022143215-appb-000161
网络设备进一步可根据参考信号端口对应的序列及时频资源映射发送参考信号。
S202：网络设备发送参考信号端口指示信息。
一种可能的实现方式中，网络设备可通过高层信令(如RRC消息)发送端口类型指示信息(用于指示配置类型1或配置类型2)，并且，网络设备通过高层信令(如RRC消息)发送端口占用的时域符号指示信息(max length＝1或2，也就是指示单符号或双符号)，从而可指示表11至表14中的一个端口、配置类型和符号关系配置表。相应的，UE根据上述两 信息确定DCI中天线端口指示信息的字段长度和对应解读(也就是确定端口相应的参考信号序列对应表11至表14中的哪一张表)。
网络设备还可发送下行控制信息(如DCI)，其中携带端口索引指示信息，用于从表中指示某组端口索引(即指示表中的值(value))，以便UE确定端口、配置类型和符号。
示例性的表11至表14例如：
表11:天线端口(表示为1000+DMRS port)，配置类型1，单符号(maxLength＝1)
Figure PCTCN2022143215-appb-000162
表12:天线端口(表示为1000+DMRS port)，配置类型1，双符号(maxLength＝2)
Figure PCTCN2022143215-appb-000163
Figure PCTCN2022143215-appb-000164
表13:天线端口(表示为1000+DMRS port)，配置类型2，maxLength＝1
Figure PCTCN2022143215-appb-000165
Figure PCTCN2022143215-appb-000166
表14:天线端口(表示为1000+DMRS port)，配置类型2，maxLength＝2
Figure PCTCN2022143215-appb-000167
Figure PCTCN2022143215-appb-000168
Figure PCTCN2022143215-appb-000169
S203：终端设备接收参考信号指示信息。
终端设备可根据参考信号指示信息，从如表11至表14所示的端口、配置类型和符号关系配置表中确定参考信号对应的端口及端口对应的时频资源。
S204：网络设备生成参考信号序列，发送参考信号。
网络设备可根据S201中所示的序列和时频资源之间的映射方式，确定发送的参考信号端口对应的序列及时频资源映射，根据序列及时频资源映射从而进行参考信号的发送。
S205：终端设备生成参考信号序列，接收参考信号。
其中，终端设备可根据S202中接收的端口索引，生成对应的参考信号序列，并在对应的时频资源上检测参考信号，进行信道估计，得到该端口对应的信道估计结果。
其中，终端设备生成参考信号序列的方式可参见在S201中对于网络设备生成相应序列的说明，这里不再赘述。
通过上述实施例提供的DMRS端口配置方式，网络设备可以实现根据当前调度的DMRS端口数目确定DMRS端口对应的时频资源及梳分程度，提高下行配对流数，提高系统效率和配置的灵活性，提高系统吞吐量，解决发送DMRS资源受限的问题。
如图11所示，参考信号的下行发送过程可包括以下步骤：
S301：网络设备确定参考信号端口集合。
参考信号端口集合可包含若干参考信号端口。其中，参考信号端口集合可包括本申请中描述的第一端口集合和第二端口集合。网络设备可以根据当前调度的总参考信号端口数目，灵活地选择使用本申请中描述的第一端口集合或第二端口集合。
在S301的过程中，网络设备还可确定集合中的端口对应的序列和时频资源映射，具体可参见S201中的描述，这里不再具体展开。
S302：网络设备发送参考信号端口指示信息。
一种可能的实现方式中，网络设备可通过高层信令(如RRC消息)发送端口类型指示信息(用于指示配置类型1或配置类型2)；并且，网络设备通过高层信令(如RRC消息)发送端口占用的时域符号指示信息(max length＝1或2，也就是指示单符号或双符号)，其中，单符号配置类型1、双符号配置类型1、单符号配置类型2和双符号配置类型2分别对应于表11至表14所示的端口、配置类型和符号关系配置表。UE根据上述两信息确定DCI中天线端口指示信息的字段长度和对应解读(也就是确定端口相应的参考信号序列对应表11至表14中的哪一张表)。表11至表14可参见S202中的介绍。
网络设备还可发送下行控制信息，其中携带端口索引指示信息，用于从表中指示某组端口索引。
S303：终端设备接收参考信号指示信息。
终端设备可根据参考信号指示信息，从如表11至表14所示的端口、配置类型和符号关系配置表中确定参考信号对应的端口及端口对应的时频资源。
S304：终端设备生成参考信号序列，发送参考信号。
其中，终端设备可根据S202中接收的端口索引，生成对应的参考信号序列。终端设备还可根据S201中所示的序列和时频资源之间的映射方式，确定参考信号端口对应的序列及时频资源映射，根据序列及时频资源映射进行参考信号的发送。其中，终端设备生成参考信号序列的方式可参见在S201中对于网络设备生成相应序列的说明，这里不再赘述。
S305：网络设备生成参考信号序列，接收参考信号。
网络设备可根据S201中所示的序列和时频资源之间的映射方式，确定发送的参考信号端口对应的序列及时频资源映射，并在相应的时频资源上检测参考信号，进行信道估计，得到该端口对应的信道估计结果。
通过上述实施例提供的DMRS端口配置方式，网络设备可以实现根据当前调度的DMRS端口数目确定DMRS端口对应的时频资源及梳分程度，进一步配置终端设备，提高上行配对流数，从而提高系统效率和配置的灵活性，提高系统吞吐量，解决发送DMRS资源受限的问题。
应理解，本发明中的各个表格表示的是各种对应的关系，且仅仅是一种可能的实现形式，可以通过预配置或者存储的方式存于网络设备或终端，在不同实施例中，最终的配置可以是上述各个实施例中的某些行。对于标识为“reserved”的各索引，可以根据后续的演进或者其他技术方案的需要指示其他信息。本发明中对应的各种公式仅仅是一种图样的表现形式。
基于与方法实施例的同一技术构思，本申请实施例提供一种通信装置。该通信装置的结构可以如图12所示，包括处理模块1201以及通信模块1202。
一种实现方式中，通信装置具体可以用于实现本申请实施例中终端设备或网络设备执行的方法，该装置可以是网络设备本身，也可以是网络设备中的芯片或芯片组/芯片系统或芯片中用于执行相关方法功能的一部分。
其中，在实现终端设备所示动作时，通信模块1202可用于接收指示信息，所述指示信息用于指示端口属于第一端口集合或第二端口集合，第一端口集合对应N个第一时频资源组，第二端口集合对应M个第二时频资源组；所述N个第一时频资源组对应的时频资源不重合，所述M个第二时频资源组对应的时频资源不重合；至少一个第二时频资源组占用的时频资源是一个第一时频资源组占用的时频资源的子集；处理模块1201可用于根据所述指示信息确定参考信号对应的端口索引。
在实现网络设备所示动作时，处理模块1201可用于确定指示信息，所述指示信息用于端口属于第一端口集合或第二端口集合，第一端口集合对应N个第一时频资源组，第二端口集合对应M个第二时频资源组；所述N个第一时频资源组对应的时频资源不重合，所述M个第二时频资源组对应的时频资源不重合；所述N个第一时频资源组与所述M个第二时频资源组占用的时频资源数量相同；至少一个第二时频资源组占用的时频资源是一个第一时频资源组占用的时频资源的子集；通信模块1202可用于发送指示信息。
以上第一端口集合、第二端口集合、第一时频资源组和第二时频资源组等含义的描述和限定可参见本申请中的相应描述，这里不再赘述。
应理解，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，另外，在本申请各个实施例中的各功能模块可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现，或者硬件和软件功能模块的结合。可以理解的是，本申请实施例中各个模块的功能或者实现可以进一步参考方法实施例的相关描述。
一种可能的方式中，通信装置可以如图13所示，该通信装置可以是通信设备或者通信设备中的芯片，其中，通信设备可以为网络设备，也可以为终端设备。该装置可以包括 处理器1301，可选的该装置还包括通信接口1302，可选的该装置还包括存储器1303。其中，处理模块1201可以为处理器1301。通信模块1202可以为通信接口1302。
处理器1301，可以是一个中央处理单元(central processing unit，CPU)，或者为数字处理单元，也可以是处理电路或逻辑电路等等。通信接口1302可以是收发器、也可以为接口电路如收发电路等、也可以为收发芯片、也可以是芯片或芯片组/芯片系统上的输入和/或输出管脚或电路等等。该装置还包括：存储器1303，用于存储处理器1301执行的程序。存储器1303可以是非易失性存储器，比如硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)等，还可以是易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)。存储器1303是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。
处理器1301用于执行存储器1303存储的程序代码，具体用于执行如上述处理模块1201的动作，本申请在此不再赘述。通信接口1302具体用于执行如上述通信模块1202的动作，本申请在此不再赘述。
本申请实施例中不限定上述通信接口1302、处理器1301以及存储器1303之间的具体连接介质。本申请实施例在图13中以存储器1303、处理器1301以及通信接口1302之间通过总线1304连接，总线在图13中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图13中仅用一条粗线表示总线1304，但并不表示仅有一根总线或一种类型的总线。
本发明实施例还提供了一种计算机可读存储介质，用于存储为执行上述处理器所需执行的计算机软件指令，其包含用于执行上述处理器所需执行的程序。
本发明实施例还提供了一种计算机程序产品，包含用于执行上述处理器所需执行的计算机程序。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个 方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (33)

  1. 一种通信方法，其特征在于，包括：
    接收指示信息，所述指示信息用于指示端口属于第一端口集合或第二端口集合，第一端口集合对应N个第一时频资源组，第二端口集合对应M个第二时频资源组；所述N个第一时频资源组对应的时频资源不重合，所述M个第二时频资源组对应的时频资源不重合；至少一个第二时频资源组占用的时频资源是一个第一时频资源组占用的时频资源的子集；
    根据所述指示信息确定参考信号对应的端口索引。
  2. 如权利要求1所述的方法，其特征在于，所述N个第一时频资源组与所述M个第二时频资源组占用的时频资源数量相同。
  3. 如权利要求1或2所述的方法，其特征在于，所述至少一个第一时频资源组与至少两个第二时频资源组占用的时频资源相同。
  4. 如权利要求1-3中任一所述的方法，其特征在于，至少一个第一时频资源组占用的时频资源数量是一个第二时频资源组占用的时频资源数量的两倍。
  5. 如权利要求1-4中任一所述的方法，其特征在于，所述N个第一时频资源组与所述M个第二时频资源组占用相同的时间单元。
  6. 如权利要求1-5中任一所述的方法，其特征在于，至少一个第二时频资源组在一个频域单元内占用的子载波是一个第一时频资源组的子集。
  7. 如权利要求1-6中任一所述的方法，其特征在于，所述M个第二时频资源组中的时频资源等间隔分布。
  8. 如权利要求1-7中任一所述的方法，其特征在于，所述第二端口集合中的端口对应梳齿4；或者，所述第二端口集合中的端口对应梳齿6。
  9. 如权利要求1-8中任一所述的方法，其特征在于，所述第一端口集合对应2个码分复用CDM组，所述第二端口集合对应3个或4个CDM组；
    或，所述第一端口集合对应3个CDM组，所述第二端口集合对应4个、5个或6个CDM组。
  10. 如权利要求1-9中任一所述的方法，其特征在于，所述第一端口集合对应第一参考信号序列
    Figure PCTCN2022143215-appb-100001
    所述第一参考信号序列
    Figure PCTCN2022143215-appb-100002
    映射在第k个子载波和第l个符号上的元素
    Figure PCTCN2022143215-appb-100003
    满足下述关系：
    Figure PCTCN2022143215-appb-100004
    Figure PCTCN2022143215-appb-100005
    k′＝0,1
    n＝0,1,…
    Figure PCTCN2022143215-appb-100006
    其中，k是大于0的整数，l′为0或1，β为非零复数,w(k ′),w(l′)分别为频域和时域掩码，r(2n+k′)为基序列r映射在第k个子载波和第l个符号上的元素。
  11. 如权利要求1-10中任一所述的方法，其特征在于，所述第二端口集合对应第二参考信号序列
    Figure PCTCN2022143215-appb-100007
    所述第二参考信号序列
    Figure PCTCN2022143215-appb-100008
    映射在第k个子载波和第l个符号上的元素
    Figure PCTCN2022143215-appb-100009
    Figure PCTCN2022143215-appb-100010
    满足下述关系：
    Figure PCTCN2022143215-appb-100011
    Figure PCTCN2022143215-appb-100012
    k ′＝0,1
    n＝0,1,…
    Figure PCTCN2022143215-appb-100013
    其中，k是大于0的整数，l′为0或1，β为非零复数,w(k ′),w(l′)分别为频域和时域掩码，r(2n+k′)为基序列r映射在第k个子载波和第l个符号上的元素。
  12. 如权利要求1-10中任一所述的方法，其特征在于，所述第二端口集合对应第二参考信号序列
    Figure PCTCN2022143215-appb-100014
    所述第二参考信号序列
    Figure PCTCN2022143215-appb-100015
    映射在第k个子载波和第l个符号上的元素
    Figure PCTCN2022143215-appb-100016
    Figure PCTCN2022143215-appb-100017
    满足下述关系：
    Figure PCTCN2022143215-appb-100018
    Figure PCTCN2022143215-appb-100019
    k ′＝0,1
    n＝0,1,…
    Figure PCTCN2022143215-appb-100020
    其中，k是大于0的整数，l′为0或1，β为非零复数,w(k ′),w(l′)分别为频域和时域掩码，r(n)为基序列r映射在第k个子载波和第l个符号上的元素。
  13. 如权利要求1-10中任一所述的方法，其特征在于，所述第二端口集合对应第二参考信号序列
    Figure PCTCN2022143215-appb-100021
    所述第二参考信号序列
    Figure PCTCN2022143215-appb-100022
    映射在第k个子载波和第l个符号上的元素
    Figure PCTCN2022143215-appb-100023
    Figure PCTCN2022143215-appb-100024
    满足下述关系：
    Figure PCTCN2022143215-appb-100025
    Figure PCTCN2022143215-appb-100026
    k ′＝0,1
    c＝1or2
    Figure PCTCN2022143215-appb-100027
    n＝0,1,…
    Figure PCTCN2022143215-appb-100028
    其中，k是大于0的整数，l′为0或1，β为非零复数,w(k ′),w(l′)分别为频域和时域掩码，c为1或2，表示参考信号端口的梳分能力，r(2n+k′)为基序列r映射在第k个子载波和第l个符号上的元素。
  14. 如权利要求1-10中任一所述的方法，其特征在于，所述第二端口集合对应第二参考信号序列
    Figure PCTCN2022143215-appb-100029
    所述第二参考信号序列
    Figure PCTCN2022143215-appb-100030
    映射在第k个子载波和第l个符号上的元素
    Figure PCTCN2022143215-appb-100031
    Figure PCTCN2022143215-appb-100032
    满足下述关系：
    Figure PCTCN2022143215-appb-100033
    Figure PCTCN2022143215-appb-100034
    k ′＝0,1
    c＝1or2
    Figure PCTCN2022143215-appb-100035
    n＝0,1,…
    Figure PCTCN2022143215-appb-100036
    其中，k是大于0的整数，l′为0或1，β为非零复数,w(k ′),w(l′)分别为频域和时域掩码，c为1或2，表示参考信号端口的梳分能力，r(n)为基序列r映射在第k个子载波和第l个符号上的元素。
  15. 一种通信方法，其特征在于，包括：
    发送指示信息，所述指示信息用于端口属于第一端口集合或第二端口集合，第一端口集合对应N个第一时频资源组，第二端口集合对应M个第二时频资源组；所述N个第一时频资源组对应的时频资源不重合，所述M个第二时频资源组对应的时频资源不重合；所述N个第一时频资源组与所述M个第二时频资源组占用的时频资源数量相同；至少一个第二时频资源组占用的时频资源是一个第一时频资源组占用的时频资源的子集。
  16. 如权利要求15所述的方法，其特征在于，所述N个第一时频资源组与所述M个第二时频资源组占用的时频资源数量相同。
  17. 如权利要求15或16所述的方法，其特征在于，所述至少一个第一时频资源组与至少两个第二时频资源组占用的时频资源相同。
  18. 如权利要求15-17中任一所述的方法，其特征在于，至少一个第一时频资源组占用 的时频资源数量是一个第二时频资源组占用的时频资源数量的两倍。
  19. 如权利要求15-18中任一所述的方法，其特征在于，所述N个第一时频资源组与所述M个第二时频资源组占用相同的时间单元。
  20. 如权利要求15-19中任一所述的方法，其特征在于，至少一个第二时频资源组在一个频域单元内占用的子载波是一个第一时频资源组的子集。
  21. 如权利要求15-20中任一所述的方法，其特征在于，所述M个第二时频资源组中的时频资源等间隔分布。
  22. 如权利要求15-21中任一所述的方法，其特征在于，所述第二端口集合中的端口对应梳齿4；或者，所述第二端口集合中的端口对应梳齿6。
  23. 如权利要求15-22中任一所述的方法，其特征在于，所述第一端口集合对应2个CDM组，所述第二端口集合对应3个或4个CDM组；
    或，所述第一端口集合对应3个CDM组，所述第二端口集合对应4个、5个或6个CDM组。
  24. 如权利要求15-23中任一所述的方法，其特征在于，所述第一端口集合对应第一参考信号序列
    Figure PCTCN2022143215-appb-100037
    所述第一参考信号序列
    Figure PCTCN2022143215-appb-100038
    映射在第k个子载波和第l个符号上的元素
    Figure PCTCN2022143215-appb-100039
    Figure PCTCN2022143215-appb-100040
    满足下述关系：
    Figure PCTCN2022143215-appb-100041
    Figure PCTCN2022143215-appb-100042
    k ′＝0,1
    n＝0,1,…
    Figure PCTCN2022143215-appb-100043
    其中，k是大于0的整数，l′为0或1，β为非零复数,w(k ′),w(l′)分别为频域和时域掩码，r(2n+k′)为基序列r映射在第k个子载波和第l个符号上的元素。
  25. 如权利要求16-23中任一所述的方法，其特征在于，所述第二端口集合对应第二参考信号序列
    Figure PCTCN2022143215-appb-100044
    所述第二参考信号序列
    Figure PCTCN2022143215-appb-100045
    映射在第k个子载波和第l个符号上的元素
    Figure PCTCN2022143215-appb-100046
    Figure PCTCN2022143215-appb-100047
    满足下述关系：
    Figure PCTCN2022143215-appb-100048
    Figure PCTCN2022143215-appb-100049
    k ′＝0,1
    n＝0,1,…
    Figure PCTCN2022143215-appb-100050
    其中，k是大于0的整数，l′为0或1，β为非零复数,w(k ′),w(l′)分别为频域和时域掩码，r(2n+k′)为基序列r映射在第k个子载波和第l个符号上的元素。
  26. 如权利要求15-23中任一所述的方法，其特征在于，所述第二端口集合对应第二参考信号序列
    Figure PCTCN2022143215-appb-100051
    所述第二参考信号序列
    Figure PCTCN2022143215-appb-100052
    映射在第k个子载波和第l个符号上的元素
    Figure PCTCN2022143215-appb-100053
    Figure PCTCN2022143215-appb-100054
    满足下述关系：
    Figure PCTCN2022143215-appb-100055
    Figure PCTCN2022143215-appb-100056
    k ′＝0,1
    n＝0,1,…
    Figure PCTCN2022143215-appb-100057
    其中，k是大于0的整数，l′为0或1，β为非零复数,w(k ′),w(l′)分别为频域和时域掩码，r(n)为基序列r映射在第k个子载波和第l个符号上的元素。
  27. 如权利要求15-23中任一所述的方法，其特征在于，所述第二端口集合对应第二参考信号序列
    Figure PCTCN2022143215-appb-100058
    所述第二参考信号序列
    Figure PCTCN2022143215-appb-100059
    映射在第k个子载波和第l个符号上的元素
    Figure PCTCN2022143215-appb-100060
    Figure PCTCN2022143215-appb-100061
    满足下述关系：
    Figure PCTCN2022143215-appb-100062
    Figure PCTCN2022143215-appb-100063
    k ′＝0,1
    c＝1,2
    Figure PCTCN2022143215-appb-100064
    n＝0,1,…
    Figure PCTCN2022143215-appb-100065
    其中，k是大于0的整数，l′为0或1，β为非零复数,w(k ′),w(l′)分别为频域和时域掩码，c为1或2，表示参考信号端口的梳分能力，r(2n+k′)为基序列r映射在第k个子载波和第l个符号上的元素。
  28. 如权利要求15-23中任一所述的方法，其特征在于，所述第二端口集合对应第二参考信号序列
    Figure PCTCN2022143215-appb-100066
    所述第二参考信号序列
    Figure PCTCN2022143215-appb-100067
    映射在第k个子载波和第l个符号上的元素
    Figure PCTCN2022143215-appb-100068
    Figure PCTCN2022143215-appb-100069
    满足下述关系：
    Figure PCTCN2022143215-appb-100070
    Figure PCTCN2022143215-appb-100071
    k ′＝0,1
    c＝1or2
    Figure PCTCN2022143215-appb-100072
    n＝0,1,…
    Figure PCTCN2022143215-appb-100073
    其中，k是大于0的整数，l′为0或1，β为非零复数,w(k ′),w(l′)分别为频域和时域掩码，c为1或2，表示参考信号端口的梳分能力，r(n)为基序列r映射在第k个子载波和第l个符号上的元素。
  29. 一种通信装置，其特征在于，包括处理器，所述处理器与存储器耦合，用于运行所述存储器中存储的计算机程序，使得所述通信装置执行如权利要求1-14或15-28中任一项所述的方法。
  30. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质用于存储计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1-14或15-28中任意一项所述的方法。
  31. 一种计算机程序产品，其特征在于，包括计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1-14或15-28中任意一项所述的方法。
  32. 一种芯片系统，其特征在于，包括处理器，用于执行存储器中存储的计算机程序，以实现如权利要求1-14或15-28中任一项所述的方法。
  33. 一种通信系统，其特征在于，包括用于执行如权利要求1-14中任一所述方法的通信装置，以及用于执行如权利要求15-28中任一所述方法的通信装置。
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107306177A (zh) * 2016-04-22 2017-10-31 华为技术有限公司 传输数据的方法、用户设备和网络侧设备
CN110536433A (zh) * 2018-09-29 2019-12-03 中兴通讯股份有限公司 Dmrs处理方法、装置、系统、设备、终端、存储介质
US20200127788A1 (en) * 2018-10-19 2020-04-23 Shanghai Langbo Communication Technology Company Limited Method and device in ue and base station used for wireless communication
CN111585623A (zh) * 2018-03-12 2020-08-25 上海朗帛通信技术有限公司 一种被用于无线通信的用户设备、基站中的方法和装置
US20210282137A1 (en) * 2018-08-09 2021-09-09 Samsung Electronics Co., Ltd. Uplink transmission method, user equipment, base station, and computer readable medium
CN114338322A (zh) * 2020-09-30 2022-04-12 华为技术有限公司 参考信号的映射方法及装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107306177A (zh) * 2016-04-22 2017-10-31 华为技术有限公司 传输数据的方法、用户设备和网络侧设备
CN111585623A (zh) * 2018-03-12 2020-08-25 上海朗帛通信技术有限公司 一种被用于无线通信的用户设备、基站中的方法和装置
US20210282137A1 (en) * 2018-08-09 2021-09-09 Samsung Electronics Co., Ltd. Uplink transmission method, user equipment, base station, and computer readable medium
CN110536433A (zh) * 2018-09-29 2019-12-03 中兴通讯股份有限公司 Dmrs处理方法、装置、系统、设备、终端、存储介质
US20200127788A1 (en) * 2018-10-19 2020-04-23 Shanghai Langbo Communication Technology Company Limited Method and device in ue and base station used for wireless communication
CN114338322A (zh) * 2020-09-30 2022-04-12 华为技术有限公司 参考信号的映射方法及装置

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