WO2023197154A1 - Procédé de communication sans fil, dispositif terminal et dispositif réseau - Google Patents

Procédé de communication sans fil, dispositif terminal et dispositif réseau Download PDF

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Publication number
WO2023197154A1
WO2023197154A1 PCT/CN2022/086358 CN2022086358W WO2023197154A1 WO 2023197154 A1 WO2023197154 A1 WO 2023197154A1 CN 2022086358 W CN2022086358 W CN 2022086358W WO 2023197154 A1 WO2023197154 A1 WO 2023197154A1
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cdm
dmrs
subcarriers
cdm group
cdm groups
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PCT/CN2022/086358
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English (en)
Chinese (zh)
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陈文洪
方昀
曹建飞
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Oppo广东移动通信有限公司
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Priority to PCT/CN2022/086358 priority Critical patent/WO2023197154A1/fr
Publication of WO2023197154A1 publication Critical patent/WO2023197154A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • 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

  • Embodiments of the present application relate to the field of communications, and more specifically, to a wireless communication method, terminal equipment, and network equipment.
  • the New Radio (NR) system supports two different Demodulation Reference Signal (DMRS) types, Type 1 and Type 2. Different types of DMRS have different resource occupancy methods. Type 1 DMRS can support up to 8 positive signals. Orthogonal DMRS ports. For type 2DMRS, up to 12 orthogonal DMRS ports can be supported. In some multi-user multiple input multiple output (Multiple-User Multiple Input Multiple Output, MU MIMO) deployment scenarios, more than 8/12 orthogonal DMRS ports may be multiplexed, such as simultaneous multiplexing during hotspot coverage. There are many terminals, or the number of transmission layers of multiplexed terminals is large. In this case, since the NR system can only support 8 or 12 orthogonal DMRS ports, the base station cannot schedule multiplexing layers exceeding this number, otherwise it will affect The demodulation performance of DMRS ultimately limits the spectrum efficiency of the system.
  • DMRS Demodulation Reference Signal
  • Embodiments of the present application provide a wireless communication method, terminal equipment and network equipment, which can expand DMRS ports to at least 4 CDM groups, and each CDM group contains at least 2 DMRS ports, thereby supporting more users. Multiplexing with the number of transmission layers improves the spectral efficiency of MU MIMO.
  • a wireless communication method which method includes:
  • the terminal device determines the physical resources occupied by different DMRS ports in the transmission bandwidth; among them, different DMRS ports are divided into M CDM groups, and each CDM group in the M CDM groups contains N DMRS ports, where M and N are both Positive integer, and M ⁇ 4, N ⁇ 2;
  • the terminal device receives the DMRS port indication information, and the terminal device sends or receives DMRS on the physical resources occupied by the DMRS port indicated by the DMRS port indication information.
  • a wireless communication method which method includes:
  • the network device determines the physical resources occupied by different DMRS ports in the transmission bandwidth; among them, different DMRS ports are divided into M CDM groups, and each CDM group in the M CDM groups contains N DMRS ports, and M and N are both Positive integer, and M ⁇ 4, N ⁇ 2;
  • the network device sends DMRS port indication information, where the DMRS port indication information is used to indicate the target DMRS port used by the terminal device;
  • the network device sends or receives DMRS on the physical resources occupied by the target DMRS port.
  • a third aspect provides a terminal device for executing the method in the first aspect.
  • the terminal device includes a functional module for executing the method in the first aspect.
  • a fourth aspect provides a network device for performing the method in the above second aspect.
  • the network device includes a functional module for executing the method in the above second aspect.
  • a terminal device including a processor and a memory; the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so that the terminal device executes the above-mentioned first aspect.
  • a network device including a processor and a memory; the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so that the network device performs the above-mentioned second aspect. Methods.
  • a seventh aspect provides an apparatus for implementing the method in any one of the above first to second aspects.
  • the device includes: a processor, configured to call and run a computer program from a memory, so that a device installed with the device executes the method in any one of the above-mentioned first to second aspects.
  • An eighth aspect provides a computer-readable storage medium for storing a computer program that causes a computer to execute the method in any one of the above-mentioned first to second aspects.
  • a computer program product including computer program instructions, which cause a computer to execute the method in any one of the above-mentioned first to second aspects.
  • a tenth aspect provides a computer program that, when run on a computer, causes the computer to execute the method in any one of the above-mentioned first to second aspects.
  • DMRS ports can be expanded to at least 4 CDM groups, and each CDM group contains at least 2 DMRS ports, thereby supporting more users and transmission layer multiplexing, and improving the spectrum efficiency of MU MIMO.
  • Figure 1 is a schematic diagram of a communication system architecture applied in an embodiment of the present application.
  • Figure 2 is a schematic diagram of two DMRS types supported by an NR provided by this application.
  • Figure 3 is a schematic flow chart of a wireless communication method provided according to an embodiment of the present application.
  • Figure 4 is a schematic diagram of subcarriers occupied by four CDM groups in two PRBs according to an embodiment of the present application.
  • Figure 5 is a schematic diagram of subcarriers occupied by another four CDM groups in two PRBs according to an embodiment of the present application.
  • Figure 6 is a schematic diagram of subcarriers occupied by yet another four CDM groups in two PRBs according to an embodiment of the present application.
  • Figure 7 is a schematic diagram of subcarriers occupied by four CDM groups in one PRB according to an embodiment of the present application.
  • Figure 8 is a schematic flowchart of another wireless communication method provided according to an embodiment of the present application.
  • Figure 9 is a schematic block diagram of a terminal device provided according to an embodiment of the present application.
  • Figure 10 is a schematic block diagram of a network device provided according to an embodiment of the present application.
  • Figure 11 is a schematic block diagram of a communication device provided according to an embodiment of the present application.
  • Figure 12 is a schematic block diagram of a device provided according to an embodiment of the present application.
  • Figure 13 is a schematic block diagram of a communication system provided according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced long term evolution
  • NR New Radio
  • NTN Non-Terrestrial Networks
  • UMTS Universal Mobile Telecommunication System
  • WLAN Wireless Local Area Networks
  • IoT Internet of Things
  • WiT wireless fidelity
  • 5G fifth-generation communication
  • the communication system in the embodiments of the present application can be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA) scenario. ) network deployment scenario, or applied to Non-Standalone (NSA) network deployment scenario.
  • Carrier Aggregation, CA Carrier Aggregation
  • DC Dual Connectivity
  • SA standalone
  • NSA Non-Standalone
  • the communication system in the embodiments of the present application can be applied to unlicensed spectrum, where the unlicensed spectrum can also be considered as shared spectrum; or, the communication system in the embodiments of the present application can also be applied to licensed spectrum, Among them, licensed spectrum can also be considered as unshared spectrum.
  • the communication system in the embodiment of the present application can be applied to the FR1 frequency band (corresponding to the frequency band range 410MHz to 7.125GHz), can also be applied to the FR2 frequency band (corresponding to the frequency band range 24.25GHz to 52.6GHz), and can also be applied to The new frequency band, for example, corresponds to the frequency band range of 52.6 GHz to 71 GHz or the high frequency band corresponding to the frequency band range of 71 GHz to 114.25 GHz.
  • the embodiments of this application describe various embodiments in combination with network equipment and terminal equipment.
  • the terminal equipment may also be called user equipment (User Equipment, UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device, etc.
  • User Equipment User Equipment
  • the terminal device can be a station (STATION, ST) in the WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, or a personal digital assistant.
  • PDA Personal Digital Assistant
  • handheld devices with wireless communication capabilities computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, next-generation communication systems such as terminal devices in NR networks, or in the future Terminal equipment in the evolved Public Land Mobile Network (PLMN) network, etc.
  • PLMN Public Land Mobile Network
  • the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons and satellites). superior).
  • the terminal device may be a mobile phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, or an augmented reality (Augmented Reality, AR) terminal.
  • Equipment wireless terminal equipment in industrial control, wireless terminal equipment in self-driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city (smart city) or wireless terminal equipment in smart home (smart home), vehicle-mounted communication equipment, wireless communication chip/application specific integrated circuit (ASIC)/system on chip (System on Chip, SoC), etc.
  • ASIC application specific integrated circuit
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices. It is a general term for applying wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes, etc.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized devices that can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, and those that only focus on a certain type of application function and need to cooperate with other devices such as smartphones.
  • the network device may be a device used to communicate with mobile devices.
  • the network device may be an access point (Access Point, AP) in WLAN, or a base station (Base Transceiver Station, BTS) in GSM or CDMA.
  • BTS Base Transceiver Station
  • it can be a base station (NodeB, NB) in WCDMA, or an evolutionary base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and an NR network network equipment or base station (gNB) or network equipment in the future evolved PLMN network or network equipment in the NTN network, etc.
  • NodeB base station
  • gNB NR network network equipment or base station
  • the network device may have mobile characteristics, for example, the network device may be a mobile device.
  • network devices may be satellites or balloon stations.
  • the satellite can be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geosynchronous orbit (geostationary earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite ) satellite, etc.
  • the network device may also be a base station installed on land, water, or other locations.
  • network equipment can provide services for a cell, and terminal equipment communicates with the network equipment through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell.
  • the cell can be a network equipment ( For example, the cell corresponding to the base station), the cell can belong to the macro base station, or it can belong to the base station corresponding to the small cell (Small cell).
  • the small cell here can include: urban cell (Metro cell), micro cell (Micro cell), pico cell ( Pico cell), femto cell (Femto cell), etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-rate data transmission services.
  • the communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120 (also referred to as a communication terminal or terminal).
  • the network device 110 can provide communication coverage for a specific geographical area and can communicate with terminal devices located within the coverage area.
  • Figure 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and other numbers of terminal devices may be included within the coverage of each network device. The embodiments of the present application do not limit this.
  • the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiments of the present application.
  • the communication device may include a network device 110 and a terminal device 120 with communication functions.
  • the network device 110 and the terminal device 120 may be the specific devices described above, which will not be described again here.
  • the communication device may also include other devices in the communication system 100, such as network controllers, mobility management entities and other network entities, which are not limited in the embodiments of this application.
  • the first communication device may be a terminal device, such as a mobile phone, a machine facility, a Customer Premise Equipment (CPE), industrial equipment, a vehicle, etc.; the second communication device The device may be a peer communication device of the first communication device, such as a network device, a mobile phone, an industrial device, a vehicle, etc.
  • CPE Customer Premise Equipment
  • This article takes the first communication device as a terminal device and the second communication device as a network device as a specific example for description.
  • the "instruction” mentioned in the embodiments of this application may be a direct instruction, an indirect instruction, or an association relationship.
  • a indicates B which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B. relation.
  • correlate can mean that there is a direct correspondence or indirect correspondence between the two, it can also mean that there is an associated relationship between the two, or it can mean indicating and being instructed, configuration and being. Configuration and other relationships.
  • predefinition or “preconfiguration” can be achieved by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices).
  • devices for example, including terminal devices and network devices.
  • predefined can refer to what is defined in the protocol.
  • the "protocol” may refer to a standard protocol in the communication field, for example, it may be an evolution of the existing LTE protocol, NR protocol, Wi-Fi protocol or protocols related to other communication systems.
  • the application does not limit the type of agreement.
  • the Demodulation Reference Signal can be divided into pre-DMRS and post-DMRS.
  • the pre-DMRS is usually located in the first few orthogonal frequency-division multiplexing (Orthogonal frequency-division) of the time slot. multiplexing (OFDM) symbols
  • the post-DMRS is a repetition of the pre-DMRS, and is used to ensure performance in high-speed scenarios.
  • the preamble DMRS can contain 1 or 2 OFDM symbols and is configured by the network device.
  • NR supports two different DMRS types, Type 1 and Type 2, and different types have different resource occupancy methods.
  • each CDM group contains 6 subcarriers.
  • Each CDM group can support 2 ports.
  • the orthogonal cover code (OCC) is maintained between the two ports. That is, the orthogonal cover code (OCC) code used by one port on different carriers is: [+1+1+1+1+1+1], the OCC code used by the other port is [+1-1+1-1+1-1].
  • Type 1 DMRS can support up to 4 orthogonal ports on one OFDM symbol and up to 8 orthogonal ports on two OFDM symbols (time-division orthogonal coverage code (Time Division Orthogonal Cover Code) is used between two OFDM symbols).
  • Time-division orthogonal coverage code Time Division Orthogonal Cover Code
  • TD-OCC Division Orthogonal Cover Code
  • the first CDM group of the first DMRS symbol includes ports ⁇ 1000,1001 ⁇
  • the second CDM group includes ports ⁇ 1002,1003 ⁇
  • the first CDM group of the second DMRS symbol includes port ⁇ 1004 ,1005 ⁇
  • the second CDM group contains ports ⁇ 1006,1007 ⁇ .
  • Type 2DMRS For type 2DMRS (B in Figure 2), one OFDM symbol of each PRB can support 3 CDM groups (different padding indicates different CDM groups), and each CDM group contains 4 adjacent subcarriers. .
  • Each CDM group can support 2 ports. The two ports are orthogonal through OCC. That is, the OCC code used by one port on different carriers is [+1+1+1+1], and the OCC code used by the other port is [+1+1+1+1]. The OCC code is [+1-1+1-1]. In this way, Type 2DMRS can support up to 6 orthogonal ports on one OFDM symbol and up to 12 orthogonal ports on two OFDM symbols (TD-OCC is used between two OFDM symbols).
  • the first CDM group of the first DMRS symbol includes ports ⁇ 1000,1001 ⁇
  • the second CDM group includes ports ⁇ 1002,1003 ⁇
  • the third CDM group includes ports ⁇ 1004,1005 ⁇
  • the second The first CDM group of DMRS symbols contains ports ⁇ 1006,1007 ⁇
  • the second CDM group contains ports ⁇ 1008,1009 ⁇
  • the third CDM group contains ports ⁇ 1010,1011 ⁇ .
  • Existing DMRS designs can support up to 8 ports for Type 1 DMRS and up to 12 ports for Type 2 DMRS.
  • more than 8/12 ports may be multiplexed, such as hotspot coverage or multiple transmission and reception points (Transmission Reception Point, TRP) transmission when more UEs are multiplexed at the same time, or The multiplexed UE has a large number of transmission layers, and each transmission layer is transmitted through a DMRS port.
  • TRP Transmission Reception Point
  • NR can only support 8 or 12 orthogonal DMRS ports, the base station cannot schedule multiplexing layers exceeding this number, otherwise it will affect the demodulation performance of DMRS and ultimately limit the spectrum efficiency of the system.
  • the DMRS ports are divided into M CDM groups.
  • Each CDM group in the M CDM groups contains N DMRS ports.
  • M and N are both positive. Integer, and M ⁇ 4, N ⁇ 2. That is, in the embodiment of the present application, Type 1 DMRS can be extended to more than 4 CDM groups, a maximum of 8 orthogonal DMRS ports can be supported on a single OFDM symbol, and a maximum of 16 orthogonal DMRS ports can be supported on two OFDM symbols.
  • DMRS ports to support more users and transmission layer multiplexing, improving the spectrum efficiency of MU-MIMO.
  • FIG 3 is a schematic flowchart of a wireless communication method 200 according to an embodiment of the present application.
  • the wireless communication method 200 may include at least part of the following content:
  • the terminal device determines the physical resources occupied by different DMRS ports in the transmission bandwidth; wherein, different DMRS ports are divided into M CDM groups, and each CDM group in the M CDM groups contains N DMRS ports, M and N All are positive integers, and M ⁇ 4, N ⁇ 2;
  • the terminal device receives the DMRS port indication information, and the terminal device sends or receives DMRS on the physical resources occupied by the DMRS port indicated by the DMRS port indication information.
  • the DMRS may be a Type 1 DMRS.
  • it can also be other types of DMRS, and this application is not limited to this.
  • the terminal device can report support for the enhanced DMRS pattern (pattern), and the network device is configured with the enhanced DMRS pattern. In this case, the terminal device can be triggered to perform the above S210.
  • DMRS port indication information is carried through one of the following:
  • DCI Downlink Control Information
  • MAC CE Media Access Control Layer Control Element
  • RRC Radio Resource Control
  • the transmission bandwidth is the transmission bandwidth of DMRS or the transmission bandwidth of DMRS-associated physical downlink shared channel (Physical Downlink Shared Channel, PDSCH)/physical uplink shared channel (Physical Uplink Shared Channel, PUSCH).
  • PDSCH Physical Downlink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • M can also be other values greater than or equal to 4
  • N can also be other values greater than or equal to 2, which this application is not limited to.
  • CDM group 0, CDM group 1, CDM group 2 and CDM group 3.
  • the value of k is determined by the size of the transmission bandwidth to ensure that DMRS can cover the entire transmission bandwidth.
  • CDM group 0 for example, DMRS port ⁇ 1000,1001 ⁇
  • CDM group 1 for example, DMRS port ⁇ 1002,1003 ⁇
  • CDM group 2 for example, DMRS port ⁇ 1004, 1005 ⁇
  • CDM group 3 for example, DMRS port ⁇ 1006,1007 ⁇ ) occupies the transmission bandwidth
  • the four CDM groups (CDM group 0, CDM group 1, CDM group 2 and CDM group 3)
  • the subcarriers occupied respectively in two PRBs can be shown in Figure 4, in which DMRS occupies 1 OFDM symbol, and different fillings in the figure represent different CDM groups.
  • the OCC codes used by the 2 DMRS ports in adjacent subcarriers of each CDM group in the M CDM groups are respectively [+1+1] and [+1-1], or the OCC codes used by the two DMRS ports contained in each of the M CDM groups on adjacent subcarriers are [+1+1+ 1] and [+1-1+1], or the OCC codes used by the two DMRS ports in adjacent subcarriers of each CDM group in the M CDM groups are [+1+1+1] respectively. and [-1+1-1].
  • the OCC codes used by the two DMRS ports included in each CDM group on adjacent subcarriers are designed to ensure orthogonality between the two DMRS ports on adjacent subcarriers.
  • the first DMRS port in each CDM group in the 4 CDM groups is on every 2 adjacent subcarriers (for example, subcarrier 0 and subcarrier
  • the OCC code used on carrier 1, subcarrier 2 and subcarrier 3, and so on) is [+1+1]
  • the OCC code used on the second DMRS port on every 2 adjacent subcarriers is [+1- 1]; or, the first DMRS port in each CDM group of the 4 CDM groups is connected to every 3 adjacent subcarriers (for example, subcarrier 0/1/2 (i.e., subcarrier 0, subcarrier 1 and subcarrier Carrier 2)
  • the OCC code used on subcarrier 3/4/5 i.e. subcarrier 3, subcarrier 4 and subcarrier 5, and so on
  • the second DMRS port is The OCC code used on every three adjacent subcarriers is [+1-1+1] or [-1+1-1].
  • the OCC codes used by the 4 DMRS ports in adjacent subcarriers of each CDM group in the M CDM groups are respectively [+1+1], [+1-1], [+1+1] and [+1-1], or the 4 DMRS ports included in each of the M CDM groups are adjacent
  • the OCC codes used by subcarriers are [+1+1+1], [+1-1+1], [+1+1+1] and [+1-1+1], or the M CDM
  • the OCC codes used by the four DMRS ports in the adjacent subcarriers of each CDM group in the group are [+1+1+1], [-1+1-1], [+1+1+1] respectively.
  • the 4 DMRS ports included in each CDM group of the M CDM groups are in the 2
  • the OCC codes used on OFDM symbols are [+1+1], [+1+1], [+1-1], and [+1-1].
  • the OCC codes used by the four DMRS ports included in each CDM group on adjacent subcarriers are designed to ensure orthogonality between the four DMRS ports on adjacent subcarriers.
  • the first and third DMRS ports in each CDM group of the 4 CDM groups are used on every 2 adjacent subcarriers.
  • the OCC code is [+1+1]
  • the OCC code used by the second and fourth DMRS ports on every 2 adjacent subcarriers is [+1-1]; or, each of the 4 CDM groups
  • the first and third DMRS ports in the CDM group use the OCC code [+1+1+1] on every 3 adjacent subcarriers
  • the second and fourth DMRS ports use the OCC code on every 3 adjacent subcarriers.
  • the OCC code used on adjacent subcarriers is [+1-1+1] or [-1+1-1].
  • the OCC codes used by the first and second DMRS ports in each of the 4 CDM groups on 2 OFDM symbols are: [+1+1]
  • the OCC code used by the third and fourth DMRS ports on 2 OFDM symbols is [+1-1].
  • the DMRS ports included in different CDM groups and the OCC codes used by each DMRS port are as shown in Table 1 below. For one DMRS symbol (that is, DMRS occupies 1 OFDM symbol), use the configuration of ports 1000-1007; for two DMRS symbols (that is, DMRS occupies 2 OFDM symbols), you can use the configuration of ports 1000-1015. It should be noted that Table 1 is only an example and does not limit this application.
  • DMRS port index CDM group index Frequency domain OCC Time domain OCC 1000 0 [+1+1] [+1+1] 1001 0 [+1-1] [+1+1] 1002 1 [+1+1] [+1+1] 1003 1 [+1-1] [+1+1] 1004 2 [+1+1] [+1+1] 1005 2 [+1-1] [+1+1] 1006 3 [+1+1] [+1+1] 1007 3 [+1-1] [+1+1] 1008 0 [+1+1] [+1-1] 1009 0 [+1-1] [+1-1] 1010 1 [+1+1] [+1-1] 1011 1 [+1-1] [+1-1] 1012 2 [+1+1] [+1-1] 1013 2 [+1-1] [+1-1] 1014 3 [+1+1] [+1-1] 1015 3 [+1-1] [+1-1] [+1-1]
  • the DMRS ports included in different CDM groups and the OCC codes used by each port are as shown in Table 2 below.
  • Table 2 For one DMRS symbol (that is, DMRS occupies 1 OFDM symbol), use the configuration of ports 1000-1007; for two DMRS symbols (that is, DMRS occupies 2 OFDM symbols), you can use the configuration of ports 1000-1015.
  • Table 2 is only an example and does not limit this application.
  • DMRS port index CDM group index Frequency domain OCC Time domain OCC 1000 0 [+1+1+1] [+1+1] 1001 0 [+1-1+1] [+1+1] 1002 1 [+1+1+1] [+1+1] 1003 1 [+1-1+1] [+1+1] 1004 2 [+1+1+1] [+1+1] 1005 2 [+1-1+1] [+1+1] 1006 3 [+1+1+1] [+1+1] 1007 3 [+1-1+1] [+1+1] 1008 0 [+1+1+1] [+1-1] 1009 0 [+1-1+1] [+1-1] 1010 1 [+1+1+1] [+1-1] 1011 1 [+1-1+1] [+1-1] 1012 2 [+1+1+1] [+1-1] 1013 2 [+1-1+1] [+1-1]
  • the port indication information may be used to indicate one or more of the DMRS ports in Table 1 or Table 2 above.
  • the DMRS port indication information is also used to indicate the CDM group used for data channel rate matching among the M CDM groups. Specifically, the terminal device can perform rate matching on the data channel according to the physical resources occupied by the CDM group indicated by the DMRS port indication information. For example, the DMRS port indication information may also indicate the number of CDM groups or CDM groups used for rate matching of PDSCH or PUSCH among the four CDM groups. Further, the terminal device performs rate matching on the PDSCH/PUSCH according to the physical resources occupied by the CDM group indicated by the DMRS port indication information.
  • the terminal device determines the physical resources occupied by the CDM group according to the number of CDM groups indicated by the DMRS port indication information, and performs rate matching on the PDSCH/PUSCH according to the physical resources occupied by the CDM group. and sending or receiving DMRS on the physical resources occupied by the DMRS port indicated by the DMRS port indication information.
  • the DMRS ports included in the four CDM groups are ⁇ 1000,1001 ⁇ , ⁇ 1002,1003 ⁇ , ⁇ 1004,1005 ⁇ , ⁇ 1006,1007 ⁇ .
  • the DMRS ports included in the four CDM groups are ⁇ 0,1 ⁇ , ⁇ 2,3 ⁇ , ⁇ 4,5 ⁇ respectively. , ⁇ 6,7 ⁇ .
  • the port numbers of the embodiment are not limited to ⁇ 1000,1001 ⁇ , ⁇ 1002,1003 ⁇ , ⁇ 1004,1005 ⁇ , ⁇ 1006,1007 ⁇ . combination.
  • the DMRS ports included in the four CDM groups are ⁇ 1008,1009 ⁇ , ⁇ 1010,1011 ⁇ , ⁇ 1012,1013 ⁇ , and ⁇ 1014,1015 ⁇ respectively.
  • the DMRS ports included in the four CDM groups are ⁇ 8,9 ⁇ , ⁇ 10,11 ⁇ , ⁇ 12,13 ⁇ respectively. , ⁇ 14,15 ⁇ .
  • the DMRS ports included in the four CDM groups are ⁇ 1000,1001,1008,1009 ⁇ and ⁇ 1002,1003,1010,1011 respectively. ⁇ , ⁇ 1004,1005,1012,1013 ⁇ , ⁇ 1006,1007,1014,1015 ⁇ .
  • the DMRS ports included in the four CDM groups are ⁇ 0,1,8,9 ⁇ , ⁇ 2,3,10, 11 ⁇ , ⁇ 4,5,12,13 ⁇ , ⁇ 6,7,14,15 ⁇ .
  • the port numbers of the embodiment are not limited to ⁇ 1000,1001,1008,1009 ⁇ , ⁇ 1002,1003,1010,1011 ⁇ , ⁇ 1004,1005, Such combinations as 1012,1013 ⁇ and ⁇ 1006,1007,1014,1015 ⁇ .
  • the starting sequence number of its port may be increased by an integer multiple of 8 (port sequence number + 8).
  • the DMRS ports included in the four CDM groups are ⁇ 1008 ,1009,1016,1017 ⁇ , ⁇ 1010,1011,1018,1019 ⁇ , ⁇ 1012,1013,1020,1021 ⁇ , ⁇ 1014,1015,1022,1023 ⁇ .
  • the DMRS ports included in the four CDM groups are ⁇ 8,9,16,17 ⁇ , ⁇ 10,11,18, 19 ⁇ , ⁇ 12,13,20,21 ⁇ , ⁇ 14,15,22,23 ⁇ .
  • the first CDM group and the second CDM group among the M CDM groups occupy different numbers of subcarriers in the same PRB. That is, among the four CDM groups, the first CDM group and the second CDM group occupy different numbers of subcarriers in the same PRB.
  • the first CDM group includes CDM group 0 or CDM group 1 among the M CDM groups
  • the second CDM group includes CDM group 2 or CDM group 3 among the M CDM groups.
  • CDM Group 0 and CDM Group 1 among the M CDM groups occupy the same number of subcarriers in one PRB
  • CDM Group 2 and CDM Group 3 among the M CDM groups occupy one PRB.
  • the number of subcarriers is the same. That is, among the four CDM groups, CDM group 0 and CDM group 1 occupy the same number of subcarriers in a PRB (called the first subcarrier number), and CDM group 2 and CDM group 3 occupy the same number of subcarriers in a PRB.
  • the number is the same (called the second subcarrier number), and the first subcarrier number and the second subcarrier number are different.
  • each of the M CDM groups occupies a different number of subcarriers in two adjacent PRBs.
  • CDM group 0 and CDM group 1 in the M CDM groups respectively occupy k 1 subcarriers in odd-numbered PRBs, and respectively occupy k 2 subcarriers in even-numbered PRBs; and/or, the M CDM group 2 and CDM group 3 in the CDM group respectively occupy k 2 subcarriers in odd-numbered PRBs, and k 1 subcarriers in even-numbered PRBs; where k 1 and k 2 are both positive integers. Specifically, k 1 ⁇ k 2 . In this way, if the transmission bandwidth is an even number of PRBs, the number of subcarriers occupied by different CDM groups is the same in the entire transmission bandwidth.
  • each CDM group occupies a different number of subcarriers in two adjacent PRBs.
  • CDM group 0 (for example, DMRS port ⁇ 1000, 1001 ⁇ ) in the M CDM groups occupies the ⁇ 1, 3, 5, 7 ⁇ th subcarriers of odd-numbered PRBs and even-numbered PRBs on the transmission bandwidth
  • CDM group 3 in the M CDM groups (for example, DMRS port ⁇ 1006,1007 ⁇ ) occupies the ⁇ 10, 12 ⁇ th subcarrier of the odd-numbered PRB and the ⁇ 6, 8, 10, 12 ⁇ th subcarrier of the even-numbered PRB on the transmission bandwidth.
  • the subcarriers occupied by four CDM groups (CDM group 0, CDM group 1, CDM group 2 and CDM group 3) in two PRBs (PRB 0 and PRB 1) can be shown in Figure 5, where DMRS Occupies 1 OFDM symbol, and different padding represents different CDM groups.
  • CDM group 0 among the M CDM groups occupies the ⁇ 1, 3, 5, 7 ⁇ th subcarriers of odd-numbered PRBs and the ⁇ 9, 11 ⁇ th subcarriers of even-numbered PRBs on the transmission bandwidth; and/or , CDM group 1 among the M CDM groups occupies the ⁇ 2, 4, 6, 8 ⁇ subcarriers of the odd PRBs and the ⁇ 10, 12 ⁇ th subcarriers of the even PRBs on the transmission bandwidth; and/or, the M CDM group 2 in the CDM group occupies the ⁇ 9,11 ⁇ th subcarrier of the odd-numbered PRB and the ⁇ 1,3,5,7 ⁇ th subcarrier of the even-numbered PRB on the transmission bandwidth; and/or, the M CDM groups CDM group 3 in occupies the ⁇ 10, 12 ⁇ th subcarrier of odd-numbered PRBs and the ⁇ 2, 4, 6, 8 ⁇ th subcarriers of even-numbered PRBs on the transmission bandwidth.
  • the subcarriers occupied by four CDM groups (CDM group 0, CDM group 1, CDM group 2 and CDM group 3) in two PRBs (PRB 0 and PRB 1) can be shown in Figure 6, where DMRS Occupies 1 OFDM symbol, and different padding represents different CDM groups.
  • the OCC codes used by the 2 DMRS ports contained in each CDM group in adjacent subcarriers in the M CDM groups are respectively [ +1+1] and [+1-1]. That is, when DMRS occupies 1 OFDM symbol, each of the 4 CDM groups contains 2 DMRS ports, and the OCC codes used by the 2 DMRS ports on adjacent subcarriers are [+1+1] and [+1-1]. For example, the OCC code used by the first DMRS port in each CDM group of 4 CDM groups is [+1+1] on every 2 adjacent subcarriers, and the OCC code used by the second DMRS port on every 2 adjacent subcarriers is [+1+1]. The OCC code used on adjacent subcarriers is [+1-1].
  • the OCC codes used by the 4 DMRS ports included in each CDM group in the 2 OFDM symbols are [+1+1], [+1+1], [+1-1] and [+1 respectively. -1].
  • each of the 4 CDM groups contains 4 DMRS ports, and the OCC codes used by the 4 DMRS ports on adjacent subcarriers are [+1+1], [+1-1], [+1+1] and [+1-1], and the OCC codes used by the 4 DMRS ports on the 2 OFDM symbols are [+1+1], [+1+1 respectively ],[+1-1],[+1-1].
  • the first and third DMRS ports in each CDM group use the OCC code [+1+1] on every 2 adjacent subcarriers
  • the second and fourth DMRS ports use every 2 adjacent subcarriers.
  • the OCC code used on 2 adjacent subcarriers is [+1-1].
  • the OCC code used by the first and second DMRS ports in each CDM group on 2 OFDM symbols is [+1+1]
  • the OCC code used by the third and fourth DMRS ports on 2 OFDM symbols is The OCC code is [+1-1].
  • CDM group 0 (for example, DMRS port ⁇ 1000, 1001, 1008, 1009 ⁇ ) among the M CDM groups occupies the ⁇ 1, 3, 5 ⁇ th subcarrier of each PRB; and/or, CDM group 1 (for example, DMRS port ⁇ 1002, 1003, 1010, 1011 ⁇ ) in the M CDM groups occupies the ⁇ 2, 4, 6 ⁇ th subcarrier of each PRB; and/or, the M CDM groups CDM group 2 (for example, DMRS port ⁇ 1004, 1005, 1012, 1013 ⁇ ) occupies the ⁇ 7, 9, 11 ⁇ th subcarrier of each PRB; and/or CDM group 3 in the M CDM groups (For example, DMRS port ⁇ 1006, 1007, 1014, 1015 ⁇ ) occupies the ⁇ 8, 10, 12 ⁇ th subcarrier of each PRB.
  • CDM group 1 for example, DMRS port ⁇ 1002, 1003, 1010, 1011 ⁇
  • CDM group 2 (for example, DMRS port ⁇ 1004, 1005, 10
  • the subcarriers occupied by 4 CDM groups (CDM group 0, CDM group 1, CDM group 2 and CDM group 3) in the PRB can be shown in Figure 7, in which DMRS occupies 1 OFDM symbol, and different padding indicates Different CDM groups.
  • the OCC codes used by the 2 DMRS ports contained in each CDM group in adjacent subcarriers in the M CDM groups are respectively [ +1+1+1] and [+1-1+1], or the OCC codes used by the two DMRS ports contained in each of the M CDM groups on adjacent subcarriers are [+1 respectively +1+1] and [-1+1-1]. That is, when DMRS occupies 1 OFDM symbol, each of the 4 CDM groups contains 2 DMRS ports, and the OCC codes used by the 2 DMRS ports on adjacent subcarriers are [+1+1+1 respectively ] and [+1-1+1], or [+1+1+1] and [-1+1-1] respectively. In this embodiment, the OCC codes used by the two DMRS ports included in each CDM group on adjacent subcarriers are used to ensure orthogonality between the two DMRS ports on adjacent subcarriers.
  • the first DMRS port in each CDM group is located on every 3 adjacent subcarriers (for example, subcarrier 0/1/2, subcarrier 3/4/5, and so on), the OCC code used by the second DMRS port on every 3 adjacent subcarriers is [+1-1+ 1] or [-1+1-1].
  • each of the 4 CDM groups contains 4 DMRS ports, and the OCC codes used by the 4 DMRS ports on adjacent subcarriers are [+1+1+1 ], [+1-1+1], [+1+1+1] and [+1-1+1], or [+1+1+1], [-1+1-1] respectively, [+1+1+1] and [-1+1-1], and the OCC codes used by the 4 DMRS ports on the 2 OFDM symbols are [+1+1], [+1+1], [ +1-1],[+1-1].
  • the OCC codes used by the first and third DMRS ports in each CDM group of the 4 CDM groups on every 3 adjacent subcarriers are [+1+1+1]
  • the second and The OCC code used by the fourth DMRS port on every 3 adjacent subcarriers is [+1-1+1] or [-1+1-1].
  • the OCC code used on 2 OFDM symbols for the first DMRS port and the second DMRS port in each CDM group of the 4 CDM groups is [+1+1]
  • the third DMRS port and the fourth The OCC code used by the DMRS port on 2 OFDM symbols is [+1-1].
  • the OCC codes used by the four DMRS ports included in each CDM group on adjacent subcarriers are designed to ensure orthogonality between the four DMRS ports on adjacent subcarriers.
  • the terminal equipment and/or network equipment can use the following method to perform channel processing based on the received DMRS Estimation: Based on the DMRS signals received on adjacent subcarriers, the channel estimates of the first DMRS port and the second DMRS port on these two subcarriers are obtained.
  • the DMRS signals received on subcarrier 0 and subcarrier 1 are subtracted and divided by 2 to obtain the received signals of the second DMRS port on subcarriers 0 and 1, and then based on the sequence on the DMRS port, the Channel estimation of DMRS port on subcarrier 0 or subcarrier 1.
  • the terminal equipment And/or the network device may use the following method to perform channel estimation based on the received DMRS: obtain the channel estimates of the first DMRS port and the second DMRS port on the two subcarriers based on the DMRS signals received on the first two subcarriers; Channel estimates of the first DMRS port and the second DMRS port on the two subcarriers are obtained based on the DMRS signals received on the
  • the DMRS signals received on subcarrier 0 and subcarrier 1 are subtracted and divided by 2 to obtain the received signals of the second DMRS port on subcarriers 0 and 1, and then based on the sequence on the DMRS port, the Channel estimation of DMRS port on subcarrier 0 or subcarrier 1;
  • Type 1 DMRS in NR can be extended to 4 CDM groups, up to 8 orthogonal DMRS ports can be supported on a single OFDM symbol, and up to 16 orthogonal DMRS ports can be supported on two OFDM symbols. , thereby supporting more users and transmission layer multiplexing, and improving the spectrum efficiency of MU-MIMO.
  • the DMRS ports of Type 1 DMRS can be expanded to at least 4 CDM groups, and each CDM group contains at least 2 DMRS ports, and up to 8 orthogonal DMRS ports can be supported on a single OFDM symbol. , can support up to 16 orthogonal DMRS ports on two OFDM symbols, thereby supporting more users and transmission layer multiplexing, and improving the spectrum efficiency of MU MIMO. For example, during hotspot coverage or multi-TRP transmission, more users and transmission layer multiplexing can be supported based on the embodiments of this application, thereby improving the spectrum efficiency of MU MIMO.
  • terminal-side embodiment of the present application is described in detail above with reference to Figures 3 to 7.
  • the network-side embodiment of the present application is described in detail below with reference to Figure 8. It should be understood that the network-side embodiment and the terminal-side embodiment correspond to each other. A similar description may refer to the terminal side embodiment.
  • FIG 8 is a schematic flowchart of a wireless communication method 300 according to an embodiment of the present application. As shown in Figure 8, the wireless communication method 300 may include at least part of the following content:
  • the network device determines the physical resources occupied by different DMRS ports in the transmission bandwidth; wherein, different DMRS ports are divided into M CDM groups, and each CDM group in the M CDM groups contains N DMRS ports, M and N All are positive integers, and M ⁇ 4, N ⁇ 2;
  • the network device sends DMRS port indication information, where the DMRS port indication information is used to indicate the target DMRS port used by the terminal device;
  • the network device sends or receives DMRS on the physical resources occupied by the target DMRS port.
  • the DMRS may be a Type 1 DMRS.
  • it can also be other types of DMRS, and this application is not limited to this.
  • the terminal device can report support for the enhanced DMRS pattern, and the network device is configured with the enhanced DMRS pattern. In this case, the network device can be triggered to perform the above S310.
  • DMRS port indication information is carried through one of the following: DCI, MAC CE, RRC.
  • the transmission bandwidth is the transmission bandwidth of DMRS or the transmission bandwidth of PDSCH/PUSCH associated with DMRS.
  • M can also be other values greater than or equal to 4
  • N can also be other values greater than or equal to 2, which this application is not limited to.
  • CDM group 0, CDM group 1, CDM group 2 and CDM group 3.
  • the value of k is determined by the size of the transmission bandwidth to ensure that DMRS can cover the entire transmission bandwidth.
  • CDM group 0 for example, DMRS port ⁇ 1000,1001 ⁇
  • CDM group 1 for example, DMRS port ⁇ 1002,1003 ⁇
  • CDM group 2 for example, DMRS port ⁇ 1004, 1005 ⁇
  • CDM group 3 for example, DMRS port ⁇ 1006,1007 ⁇ ) occupies the transmission bandwidth
  • the four CDM groups (CDM group 0, CDM group 1, CDM group 2 and CDM group 3)
  • the subcarriers occupied respectively in two PRBs can be shown in Figure 4, in which DMRS occupies 1 OFDM symbol, and different fillings in the figure represent different CDM groups.
  • the OCC codes used by the 2 DMRS ports in adjacent subcarriers of each CDM group in the M CDM groups are respectively [+1+1] and [+1-1], or the OCC codes used by the two DMRS ports contained in each of the M CDM groups on adjacent subcarriers are [+1+1+ 1] and [+1-1+1], or the OCC codes used by the two DMRS ports in adjacent subcarriers of each CDM group in the M CDM groups are [+1+1+1] respectively. and [-1+1-1].
  • the OCC codes used by the two DMRS ports included in each CDM group on adjacent subcarriers are designed to ensure orthogonality between the two DMRS ports on adjacent subcarriers.
  • the first DMRS port in each CDM group in the 4 CDM groups is on every 2 adjacent subcarriers (for example, subcarrier 0 and subcarrier
  • the OCC code used on carrier 1, subcarrier 2 and subcarrier 3, and so on) is [+1+1]
  • the OCC code used on the second DMRS port on every 2 adjacent subcarriers is [+1- 1]; or, the first DMRS port in each CDM group of the 4 CDM groups is connected to every 3 adjacent subcarriers (for example, subcarrier 0/1/2 (i.e., subcarrier 0, subcarrier 1 and subcarrier Carrier 2)
  • the OCC code used on subcarrier 3/4/5 i.e. subcarrier 3, subcarrier 4 and subcarrier 5, and so on
  • the second DMRS port is The OCC code used on every three adjacent subcarriers is [+1-1+1] or [-1+1-1].
  • the OCC codes used by the 4 DMRS ports in adjacent subcarriers of each CDM group in the M CDM groups are respectively [+1+1], [+1-1], [+1+1] and [+1-1], or the 4 DMRS ports included in each of the M CDM groups are adjacent
  • the OCC codes used by subcarriers are [+1+1+1], [+1-1+1], [+1+1+1] and [+1-1+1], or the M CDM
  • the OCC codes used by the four DMRS ports in the adjacent subcarriers of each CDM group in the group are [+1+1+1], [-1+1-1], [+1+1+1] respectively.
  • the first and third DMRS ports in each CDM group of the 4 CDM groups are used on every 2 adjacent subcarriers.
  • the OCC code is [+1+1]
  • the OCC code used by the second and fourth DMRS ports on every 2 adjacent subcarriers is [+1-1]; or, each of the 4 CDM groups
  • the first and third DMRS ports in the CDM group use the OCC code [+1+1+1] on every 3 adjacent subcarriers
  • the second and fourth DMRS ports use the OCC code on every 3 adjacent subcarriers.
  • the OCC code used on adjacent subcarriers is [+1-1+1] or [-1+1-1].
  • the OCC codes used by the four DMRS ports included in each CDM group on adjacent subcarriers are designed to ensure orthogonality between the four DMRS ports on adjacent subcarriers.
  • the OCC codes used by the first and second DMRS ports in each of the 4 CDM groups on 2 OFDM symbols are: [+1+1]
  • the OCC code used by the third and fourth DMRS ports on 2 OFDM symbols is [+1-1].
  • the DMRS ports included in different CDM groups and the OCC codes used by each DMRS port are as shown in Table 1 above. For one DMRS symbol, use the configuration of ports 1000-1007; for two DMRS symbols, you can use the configuration of ports 1000-1015.
  • the DMRS ports included in different CDM groups and the OCC codes used by each port are as shown in Table 2 above. For one DMRS symbol, use the configuration of ports 1000-1007; for two DMRS symbols, you can use the configuration of ports 1000-1015.
  • the port indication information may be used to indicate one or more of the DMRS ports in Table 1 or Table 2 above.
  • the DMRS port indication information is also used to indicate the CDM group used for data channel rate matching among the M CDM groups. Specifically, the terminal device can perform rate matching on the data channel according to the physical resources occupied by the CDM group indicated by the DMRS port indication information. For example, the DMRS port indication information may also indicate the number of CDM groups or CDM groups used for rate matching of PDSCH or PUSCH among the four CDM groups. Further, the terminal device performs rate matching on the PDSCH/PUSCH according to the physical resources occupied by the CDM group indicated by the DMRS port indication information.
  • the terminal device determines the physical resources occupied by the CDM group according to the number of CDM groups indicated by the DMRS port indication information, and performs rate matching on the PDSCH/PUSCH according to the physical resources occupied by the CDM group. and sending or receiving DMRS on the physical resources occupied by the DMRS port indicated by the DMRS port indication information.
  • the DMRS ports included in the four CDM groups are ⁇ 1000,1001 ⁇ , ⁇ 1002,1003 ⁇ , ⁇ 1004,1005 ⁇ , ⁇ 1006,1007 ⁇ .
  • the DMRS ports included in the four CDM groups are ⁇ 0,1 ⁇ , ⁇ 2,3 ⁇ , ⁇ 4,5 ⁇ respectively. , ⁇ 6,7 ⁇ .
  • the DMRS ports included in the four CDM groups are ⁇ 1008,1009 ⁇ , ⁇ 1010,1011 ⁇ , ⁇ 1012,1013 ⁇ , ⁇ 1014,1015 ⁇ .
  • the DMRS ports included in the four CDM groups are ⁇ 8,9 ⁇ , ⁇ 10,11 ⁇ , ⁇ 12,13 ⁇ respectively. , ⁇ 14,15 ⁇ .
  • the DMRS ports included in the four CDM groups are ⁇ 1000,1001,1008,1009 ⁇ and ⁇ 1002,1003,1010,1011 respectively. ⁇ , ⁇ 1004,1005,1012,1013 ⁇ , ⁇ 1006,1007,1014,1015 ⁇ .
  • the DMRS ports included in the four CDM groups are ⁇ 0,1,8,9 ⁇ , ⁇ 2,3,10, 11 ⁇ , ⁇ 4,5,12,13 ⁇ , ⁇ 6,7,14,15 ⁇ .
  • the DMRS ports included in the four CDM groups are ⁇ 1008, 1009, 1016, 1017 ⁇ and ⁇ 1010, 1011, 1018, 1019 respectively. ⁇ , ⁇ 1012,1013,1020,1021 ⁇ , ⁇ 1014,1015,1022,1023 ⁇ .
  • the DMRS ports included in the four CDM groups are ⁇ 8,9,16,17 ⁇ , ⁇ 10,11,18, 19 ⁇ , ⁇ 12,13,20,21 ⁇ , ⁇ 14,15,22,23 ⁇ .
  • the DMRS ports included in different CDM groups and the OCC codes used by each port are as shown in Table 1 or Table 2 above.
  • Table 1 or Table 2 For one DMRS symbol (that is, DMRS occupies 1 OFDM symbol), use the configuration of ports 1000-1007; for two DMRS symbols (that is, DMRS occupies 2 OFDM symbols), you can use the configuration of ports 1000-1015.
  • the first CDM group and the second CDM group among the M CDM groups occupy different numbers of subcarriers in the same PRB. That is, among the four CDM groups, the first CDM group and the second CDM group occupy different numbers of subcarriers in the same PRB.
  • the first CDM group includes CDM group 0 or CDM group 1 among the M CDM groups
  • the second CDM group includes CDM group 2 or CDM group 3 among the M CDM groups.
  • CDM Group 0 and CDM Group 1 among the M CDM groups occupy the same number of subcarriers in one PRB
  • CDM Group 2 and CDM Group 3 among the M CDM groups occupy one PRB.
  • the number of subcarriers is the same. That is, among the four CDM groups, CDM group 0 and CDM group 1 occupy the same number of subcarriers in a PRB (called the first subcarrier number), and CDM group 2 and CDM group 3 occupy the same number of subcarriers in a PRB.
  • the number is the same (called the second subcarrier number), and the first subcarrier number and the second subcarrier number are different.
  • each of the M CDM groups occupies a different number of subcarriers in two adjacent PRBs. For example, in the case where the first CDM group and the second CDM group among the M CDM groups occupy different numbers of subcarriers in the same PRB, each CDM group among the M CDM groups The number of subcarriers occupied in each PRB is different.
  • CDM group 0 and CDM group 1 in the M CDM groups respectively occupy k 1 subcarriers in odd-numbered PRBs, and respectively occupy k 2 subcarriers in even-numbered PRBs; and/or, the M CDM group 2 and CDM group 3 in the CDM group respectively occupy k 2 subcarriers in odd-numbered PRBs, and k 1 subcarriers in even-numbered PRBs; where k 1 and k 2 are both positive integers. Specifically, k 1 ⁇ k 2 . In this way, if the transmission bandwidth is an even number of PRBs, the number of subcarriers occupied by different CDM groups is the same in the entire transmission bandwidth.
  • each CDM group occupies a different number of subcarriers in two adjacent PRBs.
  • CDM group 0 (for example, DMRS port ⁇ 1000, 1001 ⁇ ) among the M CDM groups occupies the ⁇ 1, 3, 5, 7 ⁇ th subcarriers of odd-numbered PRBs and even-numbered PRBs on the transmission bandwidth.
  • the ⁇ 1,3 ⁇ th subcarrier; and/or CDM group 1 (for example, DMRS port ⁇ 1002,1003 ⁇ ) in the M CDM groups occupies the ⁇ 2,4,6th, odd-numbered PRB on the transmission bandwidth.
  • CDM group 2 (for example, DMRS port ⁇ 1004,1005 ⁇ ) in the M CDM groups occupies the odd-numbered PRBs on the transmission bandwidth
  • the ⁇ 9,11 ⁇ th subcarrier and the ⁇ 5,7,9,11 ⁇ th subcarrier of the even-numbered PRB; and/or, CDM group 3 in the M CDM groups (for example, DMRS port ⁇ 1006,1007 ⁇ ) Occupy the ⁇ 10, 12 ⁇ th subcarrier of the odd-numbered PRB and the ⁇ 6, 8, 10, 12 ⁇ th subcarrier of the even-numbered PRB on the transmission bandwidth.
  • the subcarriers occupied by four CDM groups (CDM group 0, CDM group 1, CDM group 2 and CDM group 3) in two PRBs (PRB 0 and PRB 1) can be shown in Figure 5, where DMRS Occupies 1 OFDM symbol, and different padding represents different CDM groups.
  • CDM group 0 among the M CDM groups occupies the ⁇ 1, 3, 5, 7 ⁇ th subcarriers of the odd PRBs and the ⁇ 9, 11 ⁇ th subcarriers of the even PRBs on the transmission bandwidth; and/ Or, CDM group 1 among the M CDM groups occupies the ⁇ 2, 4, 6, 8 ⁇ subcarriers of odd-numbered PRBs and the ⁇ 10, 12th ⁇ -th subcarriers of even-numbered PRBs on the transmission bandwidth; and/or, the CDM group 2 in the M CDM groups occupies the ⁇ 9,11 ⁇ th subcarrier of the odd-numbered PRB and the ⁇ 1,3,5,7 ⁇ th subcarrier of the even-numbered PRB on the transmission bandwidth; and/or, the M CDM CDM group 3 in the group occupies the ⁇ 10, 12 ⁇ th subcarriers of odd-numbered PRBs and the ⁇ 2, 4, 6, and 8th ⁇ th subcarriers of even-numbered PRBs on the transmission bandwidth.
  • the subcarriers occupied by four CDM groups (CDM group 0, CDM group 1, CDM group 2 and CDM group 3) in two PRBs (PRB 0 and PRB 1) can be shown in Figure 6, where DMRS Occupies 1 OFDM symbol, and different padding represents different CDM groups.
  • the OCC codes used by the 2 DMRS ports contained in each CDM group in adjacent subcarriers in the M CDM groups are respectively [ +1+1] and [+1-1]. That is, when DMRS occupies 1 OFDM symbol, each of the 4 CDM groups contains 2 DMRS ports, and the OCC codes used by the 2 DMRS ports on adjacent subcarriers are [+1+1] and [+1-1]. For example, the OCC code used by the first DMRS port in each CDM group of 4 CDM groups is [+1+1] on every 2 adjacent subcarriers, and the OCC code used by the second DMRS port on every 2 adjacent subcarriers is [+1+1]. The OCC code used on adjacent subcarriers is [+1-1].
  • the OCC codes used by the 4 DMRS ports included in each CDM group in the 2 OFDM symbols are [+1+1], [+1+1], [+1-1] and [+1 respectively. -1].
  • each of the 4 CDM groups contains 4 DMRS ports, and the OCC codes used by the 4 DMRS ports on adjacent subcarriers are [+1+1], [+1-1], [+1+1] and [+1-1], and the OCC codes used by the 4 DMRS ports on the 2 OFDM symbols are [+1+1], [+1+1 respectively ],[+1-1],[+1-1].
  • the first and third DMRS ports in each CDM group use the OCC code [+1+1] on every 2 adjacent subcarriers
  • the second and fourth DMRS ports use every 2 adjacent subcarriers.
  • the OCC code used on 2 adjacent subcarriers is [+1-1].
  • the OCC code used by the first and second DMRS ports in each CDM group on 2 OFDM symbols is [+1+1]
  • the OCC code used by the third and fourth DMRS ports on 2 OFDM symbols is The OCC code is [+1-1].
  • CDM group 0 (for example, DMRS port ⁇ 1000, 1001, 1008, 1009 ⁇ ) among the M CDM groups occupies the ⁇ 1, 3, 5 ⁇ th subcarrier of each PRB; and/or, CDM group 1 (for example, DMRS port ⁇ 1002, 1003,1010,1011 ⁇ ) in the M CDM groups occupies the ⁇ 2, 4, 6 ⁇ th subcarrier of each PRB; and/or, the M CDM groups CDM group 2 (for example, DMRS port ⁇ 1004, 1005, 1012, 1013 ⁇ ) occupies the ⁇ 7, 9, 11 ⁇ th subcarrier of each PRB; and/or CDM group 3 in the M CDM groups (For example, DMRS port ⁇ 1006, 1007, 1014, 1015 ⁇ ) occupies the ⁇ 8, 10, 12 ⁇ th subcarrier of each PRB.
  • CDM group 1 for example, DMRS port ⁇ 1002, 1003,1010,1011 ⁇
  • CDM group 2 (for example, DMRS port ⁇ 1004, 1005, 10
  • the subcarriers occupied by 4 CDM groups (CDM group 0, CDM group 1, CDM group 2 and CDM group 3) in the PRB can be shown in Figure 7, in which DMRS occupies 1 OFDM symbol, and different padding indicates Different CDM groups.
  • the OCC codes used by the 2 DMRS ports contained in each CDM group in adjacent subcarriers in the M CDM groups are respectively [ +1+1+1] and [+1-1+1], or the OCC codes used by the two DMRS ports contained in each of the M CDM groups on adjacent subcarriers are [+1 respectively +1+1] and [-1+1-1]. That is, when DMRS occupies 1 OFDM symbol, each of the 4 CDM groups contains 2 DMRS ports, and the OCC codes used by the 2 DMRS ports on adjacent subcarriers are [+1+1+1 respectively ] and [+1-1+1], or [+1+1+1] and [-1+1-1] respectively. In this embodiment, the OCC codes used by the two DMRS ports included in each CDM group on adjacent subcarriers are used to ensure orthogonality between the two DMRS ports on adjacent subcarriers.
  • the first DMRS port in each CDM group is located on every 3 adjacent subcarriers (for example, subcarrier 0/1/2, subcarrier 3/4/5, and so on), the OCC code used by the second DMRS port on every 3 adjacent subcarriers is [+1-1+ 1] or [-1+1-1].
  • each of the four CDM groups contains 4 DMRS ports, and the OCC codes used by the 4 DMRS ports on adjacent subcarriers are [+1+1 respectively. +1], [+1-1+1], [+1+1+1] and [+1-1+1], or [+1+1+1], [-1+1-1 respectively ], [+1+1+1] and [-1+1-1], and the OCC codes used by the 4 DMRS ports on the 2 OFDM symbols are [+1+1], [+1+1] respectively ,[+1-1],[+1-1].
  • the OCC codes used by the first and third DMRS ports in each CDM group of the 4 CDM groups on every 3 adjacent subcarriers are [+1+1+1]
  • the second and The OCC code used by the fourth DMRS port on every 3 adjacent subcarriers is [+1-1+1] or [-1+1-1].
  • the OCC code used on 2 OFDM symbols for the first DMRS port and the second DMRS port in each CDM group of the 4 CDM groups is [+1+1]
  • the third DMRS port and the fourth The OCC code used by the DMRS port on 2 OFDM symbols is [+1-1].
  • the OCC codes used by the four DMRS ports included in each CDM group on adjacent subcarriers are designed to ensure orthogonality between the four DMRS ports on adjacent subcarriers.
  • the DMRS port indication information is also used to indicate the CDM group used for data channel rate matching among the M CDM groups. Specifically, the terminal device can perform rate matching on the data channel according to the physical resources occupied by the CDM group indicated by the DMRS port indication information.
  • the terminal device and/or network device can use the following method based on the received DMRS Perform channel estimation: obtain channel estimates of the first DMRS port and the second DMRS port on these two subcarriers based on the DMRS signals received on adjacent subcarriers.
  • the DMRS signals received on subcarrier 0 and subcarrier 1 are subtracted and divided by 2 to obtain the received signals of the second DMRS port on subcarriers 0 and 1, and then based on the sequence on the DMRS port, the Channel estimation of DMRS port on subcarrier 0 or subcarrier 1.
  • the terminal equipment And/or the network device may use the following method to perform channel estimation based on the received DMRS: obtain the channel estimates of the first DMRS port and the second DMRS port on the two subcarriers based on the DMRS signals received on the first two subcarriers; Channel estimates of the first DMRS port and the second DMRS port on the two subcarriers are obtained based on the DMRS signals received on the latter two subcarriers.
  • the DMRS received signal of the intermediate subcarrier will be used twice.
  • the DMRS signals received on subcarrier 0 and subcarrier 1 are subtracted and divided by 2 to obtain the received signals of the second DMRS port on subcarriers 0 and 1, and then based on the sequence on the DMRS port, the Channel estimation of DMRS port on subcarrier 0 or subcarrier 1;
  • Type 1 DMRS in NR can be extended to 4 CDM groups, up to 8 orthogonal DMRS ports can be supported on a single OFDM symbol, and up to 16 orthogonal DMRS ports can be supported on two OFDM symbols. , thereby supporting more users and transmission layer multiplexing, and improving the spectrum efficiency of MU-MIMO.
  • the DMRS ports of Type 1 DMRS can be expanded to at least 4 CDM groups, and each CDM group contains at least 2 DMRS ports, and up to 8 orthogonal DMRS ports can be supported on a single OFDM symbol. , can support up to 16 orthogonal DMRS ports on two OFDM symbols, thereby supporting more users and transmission layer multiplexing, and improving the spectrum efficiency of MU MIMO. For example, during hotspot coverage or multi-TRP transmission, more users and transmission layer multiplexing can be supported based on the embodiments of this application, thereby improving the spectrum efficiency of MU MIMO.
  • Figure 9 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application.
  • the terminal device 400 includes:
  • the processing unit 410 is used to determine the physical resources occupied by different demodulation reference signal DMRS ports in the transmission bandwidth; wherein the different DMRS ports are divided into M code division multiplexing CDM groups, and each CDM in the M CDM groups
  • the group contains N DMRS ports, M and N are both positive integers, and M ⁇ 4, N ⁇ 2;
  • the communication unit 420 is used for DMRS port indication information, and for sending or receiving DMRS on the physical resources occupied by the DMRS port indicated by the DMRS port indication information.
  • the i-th CDM group among the M CDM groups occupies the 4k+i-th subcarrier on the transmission bandwidth
  • 2 DMRS ports included in each CDM group of the M CDM groups are used on adjacent subcarriers.
  • the orthogonal coverage code OCC codes are [+1+1] and [+1-1] respectively, or the OCC used by the 2 DMRS ports in adjacent subcarriers contained in each CDM group of the M CDM groups
  • the codes are [+1+1+1] and [+1-1+1] respectively, or the OCC codes used by the two DMRS ports contained in each of the M CDM groups on adjacent subcarriers are respectively are [+1+1+1] and [-1+1-1].
  • the OCC codes used by the 4 DMRS ports in adjacent subcarriers of each CDM group in the M CDM groups are respectively [ +1+1], [+1-1], [+1+1] and [+1-1], or the 4 DMRS ports included in each of the M CDM groups are in adjacent sub-ports.
  • the OCC codes used by the carrier are [+1+1+1], [+1-1+1], [+1+1+1] and [+1-1+1], or the M CDM groups
  • the OCC codes used by the four DMRS ports in each CDM group in adjacent subcarriers are [+1+1+1], [-1+1-1], [+1+1+1] and [-1+1-1]; and/or,
  • the OCC codes used by the 4 DMRS ports contained in each CDM group of the M CDM groups on the 2 OFDM symbols are [+1+1 respectively. ], [+1+1], [+1-1], [+1-1].
  • the first CDM group and the second CDM group among the M CDM groups occupy different numbers of subcarriers in the same physical resource block PRB.
  • the first CDM group includes CDM group 0 or CDM group 1 among the M CDM groups
  • the second CDM group includes CDM group 2 or CDM group 3 among the M CDM groups.
  • CDM Group 0 and CDM Group 1 among the M CDM groups occupy the same number of subcarriers in one PRB
  • CDM Group 2 and CDM Group 3 among the M CDM groups occupy one PRB.
  • the number of subcarriers is the same.
  • each of the M CDM groups occupies a different number of subcarriers in two adjacent PRBs.
  • CDM group 0 and CDM group 1 in the M CDM groups respectively occupy k 1 subcarriers in odd-numbered PRBs, and respectively occupy k 2 subcarriers in even-numbered PRBs; and/or,
  • CDM group 2 and CDM group 3 in the M CDM groups respectively occupy k 2 subcarriers in odd-numbered PRBs, and respectively occupy k 1 subcarriers in even-numbered PRBs;
  • k 1 and k 2 are both positive integers.
  • CDM group 0 in the M CDM groups occupies the ⁇ 1,3,5,7 ⁇ th subcarriers of odd-numbered PRBs and the ⁇ 1,3 ⁇ th subcarriers of even-numbered PRBs on the transmission bandwidth; and /or,
  • CDM group 1 in the M CDM groups occupies the ⁇ 2, 4, 6, 8 ⁇ subcarriers of the odd PRBs and the ⁇ 2, 4 ⁇ subcarriers of the even PRBs on the transmission bandwidth; and/or,
  • CDM group 2 in the M CDM groups occupies the ⁇ 9,11 ⁇ th subcarriers of odd-numbered PRBs and the ⁇ 5,7,9,11 ⁇ th subcarriers of even-numbered PRBs on the transmission bandwidth; and/or,
  • CDM group 3 among the M CDM groups occupies the ⁇ 10, 12 ⁇ th subcarriers of the odd PRBs and the ⁇ 6, 8, 10, 12 ⁇ th subcarriers of the even PRBs on the transmission bandwidth.
  • CDM group 0 in the M CDM groups occupies the ⁇ 1, 3, 5, 7 ⁇ th subcarriers of odd-numbered PRBs and the ⁇ 9, 11 ⁇ th subcarriers of even-numbered PRBs on the transmission bandwidth; and /or,
  • CDM group 1 in the M CDM groups occupies the ⁇ 2, 4, 6, 8 ⁇ subcarriers of the odd PRBs and the ⁇ 10, 12th ⁇ subcarriers of the even PRBs on the transmission bandwidth; and/or,
  • CDM group 2 in the M CDM groups occupies the ⁇ 9,11 ⁇ th subcarriers of odd-numbered PRBs and the ⁇ 1,3,5,7 ⁇ th subcarriers of even-numbered PRBs on the transmission bandwidth; and/or,
  • CDM group 3 among the M CDM groups occupies the ⁇ 10, 12 ⁇ th subcarriers of the odd PRBs and the ⁇ 2, 4, 6, 8 ⁇ th subcarriers of the even PRBs on the transmission bandwidth.
  • the OCC codes used by the 2 DMRS ports in adjacent subcarriers of each CDM group in the M CDM groups are respectively [ +1+1] and [+1-1].
  • the OCC codes used by the 4 DMRS ports included in each CDM group in the 2 OFDM symbols are [+1+1], [+1+1], [+1-1] and [+1 respectively. -1].
  • CDM group 0 in the M CDM groups occupies the ⁇ 1, 3, 5 ⁇ th subcarrier of each PRB; and/or CDM group 1 in the M CDM groups occupies each PRB The ⁇ 2, 4, 6 ⁇ th subcarrier; and/or, CDM group 2 in the M CDM groups occupies the ⁇ 7, 9, 11 ⁇ th subcarrier of each PRB; and/or, the M CDM CDM group 3 in the group occupies the ⁇ 8th, 10th, 12th ⁇ subcarriers of each PRB.
  • the OCC codes used by the 2 DMRS ports in adjacent subcarriers of each CDM group in the M CDM groups are respectively [ +1+1+1] and [+1-1+1], or the OCC codes used by the two DMRS ports contained in each of the M CDM groups on adjacent subcarriers are [+1 respectively +1+1] and [-1+1-1].
  • the OCC codes used by the 4 DMRS ports in adjacent subcarriers of each CDM group in the M CDM groups are respectively [ +1+1+1], [+1-1+1], [+1+1+1] and [+1-1+1], or, each of the M CDM groups contains The OCC codes used by the four DMRS ports on adjacent subcarriers are [+1+1+1], [-1+1-1], [+1+1+1] and [-1+1-1]. ;and / or,
  • the OCC codes used by the 4 DMRS ports included in the CDM groups in the M CDM groups on the 2 OFDM symbols are [+1+1], [+1+1], [+1-1] and [+1-1].
  • the DMRS ports included in the M CDM groups are ⁇ 1000,1001 ⁇ , ⁇ 1002,1003 ⁇ , ⁇ 1004,1005 ⁇ , and ⁇ 1006,1007 ⁇ respectively.
  • the DMRS ports included in the M CDM groups are ⁇ 1000,1001,1008,1009 ⁇ , ⁇ 1002,1003,1010,1011 ⁇ , ⁇ 1004,1005,1012,1013 ⁇ , ⁇ 1006, 1007,1014,1015 ⁇ .
  • the DMRS port indication information is also used to indicate the CDM group used for data channel rate matching among the M CDM groups;
  • the processing unit 410 is also configured to perform rate matching on the data channel according to the physical resources occupied by the CDM group indicated by the DMRS port indication information.
  • the DMRS port indication information is carried through one of the following:
  • Downlink control information DCI Downlink control information DCI, media access control layer control unit MAC CE, radio resource control RRC.
  • the above-mentioned communication unit may be a communication interface or transceiver, or an input/output interface of a communication chip or a system on a chip.
  • the above-mentioned processing unit may be one or more processors.
  • terminal device 400 may correspond to the terminal device in the method embodiment of the present application, and the above and other operations and/or functions of each unit in the terminal device 400 are respectively to implement the method shown in Figure 3
  • the corresponding process of the terminal equipment in 200 will not be repeated here for the sake of simplicity.
  • FIG 10 shows a schematic block diagram of a network device 500 according to an embodiment of the present application.
  • network device 500 includes:
  • the processing unit 510 is used to determine the physical resources occupied by different demodulation reference signal DMRS ports in the transmission bandwidth; wherein the different DMRS ports are divided into M code division multiplexing CDM groups, and each CDM in the M CDM groups
  • the group contains N DMRS ports, M and N are both positive integers, and M ⁇ 4, N ⁇ 2;
  • the communication unit 520 is configured to send DMRS port indication information, where the DMRS port indication information is used to indicate the target DMRS port used by the terminal device;
  • the communication unit 520 is also used to send or receive DMRS on the physical resources occupied by the target DMRS port.
  • the i-th CDM group among the M CDM groups occupies the 4k+i-th subcarrier on the transmission bandwidth
  • 2 DMRS ports included in each CDM group of the M CDM groups are used on adjacent subcarriers.
  • the orthogonal coverage code OCC codes are [+1+1] and [+1-1] respectively, or the OCC used by the 2 DMRS ports in adjacent subcarriers contained in each CDM group of the M CDM groups
  • the codes are [+1+1+1] and [+1-1+1] respectively, or the OCC codes used by the two DMRS ports contained in each of the M CDM groups on adjacent subcarriers are respectively are [+1+1+1] and [-1+1-1].
  • the OCC codes used by the 4 DMRS ports in adjacent subcarriers of each CDM group in the M CDM groups are respectively [ +1+1], [+1-1], [+1+1] and [+1-1], or the 4 DMRS ports included in each of the M CDM groups are in adjacent sub-ports.
  • the OCC codes used by the carrier are [+1+1+1], [+1-1+1], [+1+1+1] and [+1-1+1], or the M CDM groups
  • the OCC codes used by the four DMRS ports in each CDM group in adjacent subcarriers are [+1+1+1], [-1+1-1], [+1+1+1] and [-1+1-1]; and/or,
  • the OCC codes used by the 4 DMRS ports contained in each CDM group of the M CDM groups on the 2 OFDM symbols are [+1+1 respectively. ], [+1+1], [+1-1], [+1-1].
  • the first CDM group and the second CDM group among the M CDM groups occupy different numbers of subcarriers in the same physical resource block PRB.
  • the first CDM group includes CDM group 0 or CDM group 1 among the M CDM groups
  • the second CDM group includes CDM group 2 or CDM group 3 among the M CDM groups.
  • CDM Group 0 and CDM Group 1 among the M CDM groups occupy the same number of subcarriers in one PRB
  • CDM Group 2 and CDM Group 3 among the M CDM groups occupy one PRB.
  • the number of subcarriers is the same.
  • each of the M CDM groups occupies a different number of subcarriers in two adjacent PRBs.
  • CDM group 0 and CDM group 1 in the M CDM groups respectively occupy k 1 subcarriers in odd-numbered PRBs, and respectively occupy k 2 subcarriers in even-numbered PRBs; and/or,
  • CDM group 2 and CDM group 3 in the M CDM groups respectively occupy k 2 subcarriers in odd-numbered PRBs, and respectively occupy k 1 subcarriers in even-numbered PRBs;
  • k 1 and k 2 are both positive integers.
  • CDM group 0 in the M CDM groups occupies the ⁇ 1,3,5,7 ⁇ th subcarriers of odd-numbered PRBs and the ⁇ 1,3 ⁇ th subcarriers of even-numbered PRBs on the transmission bandwidth; and /or,
  • CDM group 1 in the M CDM groups occupies the ⁇ 2, 4, 6, 8 ⁇ subcarriers of the odd PRBs and the ⁇ 2, 4 ⁇ subcarriers of the even PRBs on the transmission bandwidth; and/or,
  • CDM group 2 in the M CDM groups occupies the ⁇ 9,11 ⁇ th subcarriers of odd-numbered PRBs and the ⁇ 5,7,9,11 ⁇ th subcarriers of even-numbered PRBs on the transmission bandwidth; and/or,
  • CDM group 3 among the M CDM groups occupies the ⁇ 10, 12 ⁇ th subcarriers of the odd PRBs and the ⁇ 6, 8, 10, 12 ⁇ th subcarriers of the even PRBs on the transmission bandwidth.
  • CDM group 0 in the M CDM groups occupies the ⁇ 1, 3, 5, 7 ⁇ th subcarriers of odd-numbered PRBs and the ⁇ 9, 11 ⁇ th subcarriers of even-numbered PRBs on the transmission bandwidth; and /or,
  • CDM group 1 in the M CDM groups occupies the ⁇ 2, 4, 6, 8 ⁇ subcarriers of the odd PRBs and the ⁇ 10, 12th ⁇ subcarriers of the even PRBs on the transmission bandwidth; and/or,
  • CDM group 2 in the M CDM groups occupies the ⁇ 9,11 ⁇ th subcarriers of odd-numbered PRBs and the ⁇ 1,3,5,7 ⁇ th subcarriers of even-numbered PRBs on the transmission bandwidth; and/or,
  • CDM group 3 among the M CDM groups occupies the ⁇ 10, 12 ⁇ th subcarriers of the odd PRBs and the ⁇ 2, 4, 6, 8 ⁇ th subcarriers of the even PRBs on the transmission bandwidth.
  • the OCC codes used by the 2 DMRS ports in adjacent subcarriers of each CDM group in the M CDM groups are respectively [ +1+1] and [+1-1].
  • the OCC codes used by the 4 DMRS ports included in each CDM group in the 2 OFDM symbols are [+1+1], [+1+1], [+1-1] and [+1 respectively. -1].
  • CDM group 0 in the M CDM groups occupies the ⁇ 1, 3, 5 ⁇ th subcarrier of each PRB; and/or CDM group 1 in the M CDM groups occupies each PRB The ⁇ 2, 4, 6 ⁇ th subcarrier; and/or, CDM group 2 in the M CDM groups occupies the ⁇ 7, 9, 11 ⁇ th subcarrier of each PRB; and/or, the M CDM CDM group 3 in the group occupies the ⁇ 8th, 10th, 12th ⁇ subcarriers of each PRB.
  • the OCC codes used by the 2 DMRS ports in adjacent subcarriers of each CDM group in the M CDM groups are respectively [ +1+1+1] and [+1-1+1], or the OCC codes used by the two DMRS ports contained in each of the M CDM groups on adjacent subcarriers are [+1 respectively +1+1] and [-1+1-1].
  • the OCC codes used by the 4 DMRS ports in adjacent subcarriers of each CDM group in the M CDM groups are respectively [ +1+1+1], [+1-1+1], [+1+1+1] and [+1-1+1], or 4 of the M CDM groups.
  • the OCC codes used by DMRS ports in adjacent subcarriers are [+1+1+1], [-1+1-1], [+1+1+1] and [-1+1-1] respectively; and /or,
  • the OCC codes used by the 4 DMRS ports included in the CDM groups in the M CDM groups on the 2 OFDM symbols are [+1+1], [+1+1], [+1-1] and [+1-1].
  • the DMRS ports included in the M CDM groups are ⁇ 1000,1001 ⁇ , ⁇ 1002,1003 ⁇ , ⁇ 1004,1005 ⁇ , and ⁇ 1006,1007 ⁇ respectively.
  • the DMRS ports included in the M CDM groups are ⁇ 1000,1001,1008,1009 ⁇ , ⁇ 1002,1003,1010,1011 ⁇ , ⁇ 1004,1005,1012,1013 ⁇ , ⁇ 1006, 1007,1014,1015 ⁇ .
  • the DMRS port indication information is also used to indicate the CDM group used for data channel rate matching among the M CDM groups.
  • the DMRS port indication information is carried through one of the following:
  • Downlink control information DCI Downlink control information DCI, media access control layer control unit MAC CE, radio resource control RRC.
  • the above-mentioned communication unit may be a communication interface or transceiver, or an input/output interface of a communication chip or a system on a chip.
  • the above-mentioned processing unit may be one or more processors.
  • network device 500 may correspond to the network device in the method embodiment of the present application, and the above and other operations and/or functions of each unit in the network device 500 are respectively to implement the method shown in Figure 8
  • the corresponding process of the network equipment in 300 will not be described again for the sake of simplicity.
  • Figure 11 is a schematic structural diagram of a communication device 600 provided by an embodiment of the present application.
  • the communication device 600 shown in Figure 11 includes a processor 610.
  • the processor 610 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • communication device 600 may also include memory 620.
  • the processor 610 can call and run the computer program from the memory 620 to implement the method in the embodiment of the present application.
  • the memory 620 may be a separate device independent of the processor 610 , or may be integrated into the processor 610 .
  • the communication device 600 may also include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, specifically, may send information or data to other devices, or Receive information or data from other devices.
  • the transceiver 630 may include a transmitter and a receiver.
  • the transceiver 630 may further include an antenna, and the number of antennas may be one or more.
  • the communication device 600 can be specifically a network device according to the embodiment of the present application, and the communication device 600 can implement the corresponding processes implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, the communication device 600 is not mentioned here. Again.
  • the communication device 600 can be a terminal device according to the embodiment of the present application, and the communication device 600 can implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, this is not mentioned here. Again.
  • Figure 12 is a schematic structural diagram of the device according to the embodiment of the present application.
  • the device 700 shown in Figure 12 includes a processor 710.
  • the processor 710 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • device 700 may also include memory 720.
  • the processor 710 can call and run the computer program from the memory 720 to implement the method in the embodiment of the present application.
  • the memory 720 may be a separate device independent of the processor 710 , or may be integrated into the processor 710 .
  • the device 700 may also include an input interface 730.
  • the processor 710 can control the input interface 730 to communicate with other devices or chips. Specifically, it can obtain information or data sent by other devices or chips.
  • the device 700 may also include an output interface 740.
  • the processor 710 can control the output interface 740 to communicate with other devices or chips. Specifically, it can output information or data to other devices or chips.
  • the device can be applied to the network device in the embodiment of the present application, and the device can implement the corresponding processes implemented by the network device in the various methods of the embodiment of the present application. For the sake of brevity, the details are not repeated here.
  • the device can be applied to the terminal device in the embodiments of the present application, and the device can implement the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application. For the sake of brevity, the details will not be described again.
  • the devices mentioned in the embodiments of this application may also be chips.
  • it can be a system-on-a-chip, a system-on-a-chip, a system-on-a-chip or a system-on-a-chip, etc.
  • Figure 13 is a schematic block diagram of a communication system 800 provided by an embodiment of the present application. As shown in FIG. 13 , the communication system 800 includes a terminal device 810 and a network device 820 .
  • the terminal device 810 can be used to implement the corresponding functions implemented by the terminal device in the above method
  • the network device 820 can be used to implement the corresponding functions implemented by the network device in the above method.
  • the terminal device 810 can be used to implement the corresponding functions implemented by the terminal device in the above method
  • the network device 820 can be used to implement the corresponding functions implemented by the network device in the above method.
  • the processor in the embodiment of the present application may be an integrated circuit chip and has signal processing capabilities.
  • each step of the above method embodiment can be completed through an integrated logic circuit of hardware in the processor or instructions in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available processors.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.
  • the steps of the method disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory may be Random Access Memory (RAM), which is used as an external cache.
  • RAM Random Access Memory
  • RAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • Synchlink DRAM SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the memory in the embodiment of the present application can also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is, memories in embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.
  • Embodiments of the present application also provide a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiment of the present application. For the sake of simplicity, I won’t go into details here.
  • the computer-readable storage medium can be applied to the terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding processes implemented by the terminal device in the various methods of the embodiment of the present application. For the sake of simplicity, I won’t go into details here.
  • An embodiment of the present application also provides a computer program product, including computer program instructions.
  • the computer program product can be applied to the network equipment in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network equipment in the various methods of the embodiments of the present application. For simplicity, in This will not be described again.
  • the computer program product can be applied to the terminal device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the terminal device in the various methods of the embodiment of the present application. For simplicity, in This will not be described again.
  • An embodiment of the present application also provides a computer program.
  • the computer program can be applied to the network equipment in the embodiments of the present application.
  • the computer program When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the network equipment in the various methods of the embodiments of the present application.
  • the computer program For the sake of brevity, no further details will be given here.
  • the computer program can be applied to the terminal device in the embodiments of the present application.
  • the computer program When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application.
  • the computer program For the sake of brevity, no further details will be given here.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code. .

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

Abstract

Selon des modes de réalisation, la présente invention concerne un procédé de communication sans fil, un dispositif terminal et un dispositif de réseau. Des ports DMRS peuvent être étendus à au moins quatre groupes CDM, et chaque groupe CDM comprend au moins deux ports DMRS, de telle sorte que le multiplexage de davantage d'utilisateurs et plus de couches de transmission peut être pris en charge, et l'efficacité de spectre de MIMO MU est améliorée. Le procédé de communication sans fil comprend les étapes suivantes : un dispositif terminal détermine des ressources physiques occupées par différents ports DMRS sur une bande passante de transmission, Les différents ports DMRS étant divisés en M groupes CDM, chaque groupe CDM dans les M groupes CDM comprenant N ports DMRS, M et N étant tous deux des nombres entiers positifs, M ≥ 4, et N ≥ 2 ; et le dispositif terminal reçoit des informations d'indication de port DMRS, et le dispositif terminal envoie ou reçoit un DMRS sur une ressource physique occupée par un port DMRS indiqué par les informations d'indication de port DMRS.
PCT/CN2022/086358 2022-04-12 2022-04-12 Procédé de communication sans fil, dispositif terminal et dispositif réseau WO2023197154A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105900387A (zh) * 2014-06-12 2016-08-24 华为技术有限公司 一种资源分配方法及装置
US20190068308A1 (en) * 2017-08-24 2019-02-28 Samsung Electronics Co., Ltd. Dmrs port grouping method and apparatus for use in wireless cellular communication system
US20210385038A1 (en) * 2018-11-01 2021-12-09 Nec Corporation Reference signal transmission
CN114071723A (zh) * 2020-07-30 2022-02-18 华为技术有限公司 一种通信方法及装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105900387A (zh) * 2014-06-12 2016-08-24 华为技术有限公司 一种资源分配方法及装置
US20190068308A1 (en) * 2017-08-24 2019-02-28 Samsung Electronics Co., Ltd. Dmrs port grouping method and apparatus for use in wireless cellular communication system
US20210385038A1 (en) * 2018-11-01 2021-12-09 Nec Corporation Reference signal transmission
CN114071723A (zh) * 2020-07-30 2022-02-18 华为技术有限公司 一种通信方法及装置

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