WO2020200114A1 - Dmrs端口的指示方法及装置 - Google Patents

Dmrs端口的指示方法及装置 Download PDF

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Publication number
WO2020200114A1
WO2020200114A1 PCT/CN2020/081767 CN2020081767W WO2020200114A1 WO 2020200114 A1 WO2020200114 A1 WO 2020200114A1 CN 2020081767 W CN2020081767 W CN 2020081767W WO 2020200114 A1 WO2020200114 A1 WO 2020200114A1
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WIPO (PCT)
Prior art keywords
dmrs
indication information
configuration information
port
ports
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PCT/CN2020/081767
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English (en)
French (fr)
Inventor
纪刘榴
任翔
王潇涵
杭海存
施弘哲
毕晓艳
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华为技术有限公司
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Publication of WO2020200114A1 publication Critical patent/WO2020200114A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path

Definitions

  • This application relates to the field of communication technology, and in particular to a method and device for indicating a demodulation reference signal (DMRS) port.
  • DMRS demodulation reference signal
  • the communication system In order to obtain higher spectrum utilization, the communication system generally adopts the same frequency networking method. That is, multiple cells in the network can be deployed in the same frequency band. In this way, when the user is at the edge of the serving cell, the user may be subject to co-channel interference from neighboring cells of the serving cell, which severely limits the service quality and throughput of the edge user. Therefore, in order to solve the problem of interference between cells, Coordinated Multi-Point (CoMP) transmission technology is widely used.
  • the assisted multipoint transmission technology specifically refers to that multiple transmission points (transmission reception points, TRP) cooperate to transmit data for one terminal, or multiple TRPs jointly receive data sent by one terminal.
  • the terminal needs to know the DMRS port used by each TRP in order to demodulate the data sent by multiple TRPs. Since the DMRS ports adopted by multiple TRPs have many schemes, if the current DMRS port indication method is used, it is necessary to increase the bits of the DMRS port indication information, which results in a large signaling transmission overhead.
  • the present application provides a method and device for indicating DMRS ports, which are used to effectively indicate the DMRS ports used by multiple TRPs and reduce signaling transmission overhead.
  • a method for indicating a DMRS port including: a terminal receives first indication information and second indication information; wherein the first indication information is used to indicate N transmission configuration indication (TCI) states; The second indication information is used to indicate at least one group of DMRS configuration information.
  • One group of DMRS configuration information includes the port numbers of M DMRS ports, where M and N are both positive integers; the terminal according to the number of TCI states indicated by the first indication information , Determining a corresponding set of DMRS configuration information from at least one set of DMRS configuration information indicated by the second indication information. Based on this technical solution, for the number of different TCI states, the second indication information corresponds to different DMRS configuration information.
  • the number of TCI states and the second indication information are used to jointly indicate the DMRS configuration information.
  • the second indication information may indicate more DMRS configuration information. In this way, there is no need to increase the bits of the second indication information (that is, the DMRS port indication information), and the DMRS ports used by multiple TRPs can also be effectively indicated, which is beneficial to reducing signaling transmission overhead.
  • a method for indicating a DMRS port including: a network device generates first indication information and second indication information, the first indication information is used to indicate N TCI states; the second indication information is used to indicate at least one group DMRS configuration information.
  • the DMRS configuration information includes the port numbers of M DMRS ports; the number of TCI states indicated by the first indication information is used to determine a group of DMRS configurations from at least one group of DMRS configuration information indicated by the second indication information Information; N and M are both positive integers; after that, the network device sends the first indication information and the second indication information to the terminal.
  • the number of TCI states indicated by the first indication information is used to determine the first preset correspondence relationship
  • the first preset correspondence relationship is the DMRS configuration information and the first preset correspondence relationship.
  • the second indication information is used to determine the second preset correspondence
  • the second preset correspondence is the correspondence between the DMRS configuration information and the number of TCI states relationship.
  • the DMRS port indicated by the set of DMRS configuration information corresponding to the number of TCI states greater than one belongs to Different code division multiplexing (CDM) groups.
  • CDM Code division multiplexing
  • the N TCI states indicated by the first indication information include a first TCI state and a second TCI state; the first TCI state corresponds to the M first DMRS Port; wherein the M first DMRS ports are configured by the corresponding set of DMRS configuration information; the second TCI state corresponds to M second DMRS ports; wherein, the M second DMRS ports are based on the The corresponding relationship between the M second DMRS ports and the M first DMRS ports is configured.
  • the design of DMRS configuration information can be simplified.
  • a group of DMRS configuration information corresponding to the number of TCI states of K includes K groups of DMRS ports
  • the port numbers of the K groups of DMRS ports have a one-to-one correspondence with the K TCI states, the port numbers of the K groups of DMRS ports are the same, and K is a positive integer.
  • a set of DMRS configuration information further includes: the number of CDM groups not used for mapping data, and/or the number of preamble symbols.
  • a terminal including: a processing module and a communication module.
  • the communication module is used to receive first indication information and second indication information; wherein, the first indication information is used to indicate N TCI states; the second indication information is used to indicate at least one set of DMRS configuration information, and one set of DMRS configuration
  • the information includes the port numbers of M DMRS ports, and both M and N are positive integers.
  • the processing module is configured to determine a group of DMRS configuration information from at least one group of DMRS configuration information indicated by the second indication information according to the number of TCI states indicated by the first indication information.
  • the number of TCI states indicated by the first indication information is used to determine the first preset correspondence
  • the first preset correspondence is the correspondence between the DMRS configuration information and the second indication information.
  • the second indication information is used to determine the second preset correspondence
  • the second preset correspondence is the correspondence between the DMRS configuration information and the number of TCI states.
  • the DMRS ports indicated by the group of DMRS configuration information corresponding to the number of TCI states greater than one belong to different CDM groups.
  • the N TCI states indicated by the first indication information include a first TCI state and a second TCI state; the first TCI state corresponds to the M first DMRS ports; wherein the M th A DMRS port is configured by the corresponding set of DMRS configuration information; the second TCI state corresponds to M second DMRS ports; wherein, the M second DMRS ports are based on the M second DMRS ports and the The corresponding relationship between the M first DMRS ports is configured.
  • a group of DMRS configuration information corresponding to the number of TCI states of K includes the port numbers of the K groups of DMRS ports, and the number of the K groups of DMRS ports.
  • the port number has a one-to-one correspondence with the K TCI states, the port numbers of the K groups of DMRS ports are the same, and K is a positive integer.
  • a group of DMRS configuration information further includes: the number of CDM groups not used for mapping data, and/or the number of preamble symbols.
  • a terminal including: a processor for coupling with a memory, reading instructions in the memory, and implementing the DMRS port instruction method as described in the first aspect above according to the instructions .
  • a computer-readable storage medium stores instructions that, when run on a terminal, enable the terminal to execute the DMRS port described in the first or third aspect. Indication method.
  • a computer program product containing instructions which when running on a communication device, enables a terminal to execute the DMRS port instruction method described in the first or third aspect.
  • a chip in a seventh aspect, includes a processing module and a communication interface.
  • the communication interface is used to transmit received code instructions to the processing module.
  • the processing module is used to run the code instructions to support the terminal to execute the above-mentioned first aspect.
  • the code instruction can come from the internal memory of the chip or the external memory of the chip.
  • the processing module may be a processor, microprocessor, or integrated circuit integrated on the chip.
  • the communication interface can be an input/output circuit or transceiver pins on the chip.
  • a network device including: a processing module and a communication module.
  • the processing module is used to generate first indication information and second indication information.
  • the first indication information is used to indicate N TCI states;
  • the second indication information is used to indicate at least one set of DMRS configuration information, and the DMRS configuration information includes M
  • the number of TCI states indicated by the first indication information is used to determine the corresponding set of DMRS configuration information from at least one set of DMRS configuration information indicated by the second indication information;
  • N and M are both positive Integer;
  • the communication module is used to send the first indication information and the second indication information to the terminal.
  • the number of TCI states indicated by the first indication information is used to determine the first preset correspondence
  • the first preset correspondence is the correspondence between the DMRS configuration information and the second indication information.
  • the second indication information is used to determine the second preset correspondence
  • the second preset correspondence is the correspondence between the DMRS configuration information and the number of TCI states.
  • the DMRS ports indicated by the group of DMRS configuration information corresponding to the number of TCI states greater than one belong to different CDM groups.
  • the N TCI states indicated by the first indication information include a first TCI state and a second TCI state; the first TCI state corresponds to the M first DMRS ports; wherein the M th A DMRS port is configured by the corresponding set of DMRS configuration information; the second TCI state corresponds to M second DMRS ports; wherein, the M second DMRS ports are based on the M second DMRS ports and the The corresponding relationship between the M first DMRS ports is configured.
  • a group of DMRS configuration information corresponding to the number of TCI states of K includes the port numbers of the K groups of DMRS ports, and the number of the K groups of DMRS ports.
  • the port number has a one-to-one correspondence with the K TCI states, the port numbers of the K groups of DMRS ports are the same, and K is a positive integer.
  • a group of DMRS configuration information further includes: the number of CDM groups not used for mapping data, and/or the number of preamble symbols.
  • a network device including: a processor configured to couple with a memory, read instructions in the memory, and implement the instruction of the DMRS port as described in the second aspect according to the instructions method.
  • a computer-readable storage medium stores instructions that, when run on a network device, enable the network device to execute the DMRS port instruction method described in the second aspect above .
  • a computer program product containing instructions which when running on a communication device, enables a network device to execute the DMRS port instruction method described in the second aspect.
  • a chip in a twelfth aspect, includes a processing module and a communication interface.
  • the communication interface is used to transmit received code instructions to the processing module, and the processing module is used to run the code instructions to support network devices to execute the second aspect.
  • the code instruction can come from the internal memory of the chip or the external memory of the chip.
  • the processing module may be a processor, microprocessor, or integrated circuit integrated on the chip.
  • the communication interface can be an input/output circuit or transceiver pins on the chip.
  • a communication system including a network device and a terminal.
  • the terminal is used to perform the method described in the first aspect
  • the network device is used to perform the method described in the second aspect.
  • FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the application
  • FIG. 2 is a schematic diagram of the architecture of another communication system provided by an embodiment of the application.
  • FIG. 3 is a schematic diagram of the hardware structure of a terminal and a network device provided by an embodiment of the application;
  • FIG. 4 is a flowchart of a method for indicating a DMRS port according to an embodiment of the application
  • FIG. 5 is a schematic structural diagram of a terminal provided by an embodiment of this application.
  • FIG. 6 is a schematic structural diagram of a network device provided by an embodiment of this application.
  • FIG. 7 is a schematic structural diagram of a chip provided by an embodiment of the application.
  • the antenna port can be understood as a transmitting antenna that can be identified by the receiving end device, or a transmitting antenna that can be distinguished in space.
  • the antenna port can be defined according to the reference signal (or pilot signal) associated with the antenna port.
  • An antenna port can be a physical antenna on the transmitting end device, or a weighted combination of multiple physical antennas on the transmitting end device. In the embodiment of the present application, unless otherwise specified, one antenna port corresponds to one reference signal.
  • the antenna port is used to carry at least one of specific physical channels and physical signals.
  • the DMRS port is the antenna port that carries the DMRS.
  • Signals transmitted through the same antenna port, regardless of whether these signals are transmitted through the same or different physical antennas, the channels corresponding to the paths of these signals in the space transmission can be regarded as the same or related. That is to say, for the signals sent on the same antenna port, the receiving end can consider their channels to be the same or related during demodulation.
  • the antenna port defines the channel on a certain symbol. If the antenna ports of the two symbols are the same, the channel on one symbol can be inferred from the channel on the other symbol.
  • the antenna port is uniquely identified by the port number.
  • the port number may also have other names, such as port index, port identification, etc.
  • the embodiment of the present application is not limited thereto.
  • the port number can also uniquely identify the port through a function change. For example, indicate the port number used by the terminal as the input of the function, and actually use the identifier of the antenna port as the output of the function.
  • the function has a one-to-one mapping relationship between input and output.
  • the function is a constant plus input as output.
  • the identifier of the antenna port that is actually used may be used as the identifier for generating the signal of the antenna port.
  • the identification of the sequence of the antenna port is generated, which may include the identification of the pseudo-random function initialization factor of the generated sequence.
  • DMRS port #X means the DMRS port with port number X.
  • a group of DMRS ports can be expressed as ⁇ x1, x2,..., xn ⁇ .
  • ⁇ 1,2 ⁇ means that the group of DMRS ports are DMRS port #1 and DMRS port #2.
  • DMRS is used to realize the demodulation of the physical downlink shared channel (PDSCH).
  • PDSCH physical downlink shared channel
  • the DMRS is carried on part of orthogonal frequency division multiplexing (OFDM) symbols in the PDSCH (or time unit).
  • OFDM orthogonal frequency division multiplexing
  • the network equipment will configure the PDSCH (or time unit) to carry the front-load DMRS with the OFDM symbol in the front position, so that the terminal can perform user detection and channel estimation operations as soon as possible, reducing the delay of demodulation .
  • the OFDM symbols carrying the front-load DMRS may be referred to as front-load symbols for short.
  • the number of preamble symbols may be one or two, and the embodiment of the present application is not limited to this.
  • DMRS type can be divided into type1 and type2. There is a corresponding relationship between the DMRS type and the resource pattern, and the resource pattern is used to indicate the position of the resource element (RE) that carries the DMRS. It should be noted that the DMRS type can be configured by the high-level parameter DL-DMRS-config-type.
  • the indication information of the DMRS port may be the antenna port field in the DCI.
  • the communication system is pre-configured with a DMRS port indication table, and the DMRS port indication table is used to store multiple sets of DMRS configuration information.
  • the value of the antenna port field is the index value of the DMRS configuration information in the DMRS port indication table, that is, each value of the antenna port field corresponds to a set of DMRS configuration information.
  • a set of DMRS configuration information may include one or more configuration information.
  • a set of DMRS configuration information may include the port number of the DMRS port, the number of DMRS CDM groups not used for data mapping, and/or the number of preamble symbols. number.
  • the DMRS port indication table can refer to Table 1 below.
  • the DMRS type is type 2, and the maximum length of symbols occupied by DMRS is 1.
  • Table 1 shows the correspondence between the value of the antenna port field (that is, the index value) and a set of DMRS configuration information.
  • a group of DMRS configuration information corresponds to a row identified by an index value.
  • the DMRS configuration information indicates that the port number of the DMRS port is 0, and no mapping
  • the number of DMRS CDM groups of data is one, and the number of preamble symbols is one.
  • a CDM group contains multiple antenna ports. Multiple antenna ports in the same CDM group multiplex the same time-frequency resources, and multiple antenna ports in the same CDM group are distinguished by code division, that is, in the same CDM
  • the code domain resources of the sequences of multiple antenna ports are different.
  • the code domain resources are usually orthogonal codes, such as Orthogonal Cover Code (OCC) and so on.
  • OCC Orthogonal Cover Code
  • the OCC code can be used in time domain, frequency domain, spatial domain (beam domain), and so on.
  • the CDM group specifically refers to the DMRS CDM group, that is, the CDM group includes multiple DMRS ports.
  • the CDM group can be configured by high-level signaling, and the specific content can be referred to the prior art, which will not be repeated here.
  • the DMRS port included in CDM group 1 is ⁇ 0,1 ⁇ , and the DMRS port included in CDM group 2 is ⁇ 2,3 ⁇ ;
  • the DMRS ports included in CDM group 1 are ⁇ 0,1,4,5 ⁇ , and the DMRS ports included in CDM group 2 are ⁇ 2,3,6,7 ⁇ ;
  • the DMRS port included in CDM group 1 is ⁇ 0,1 ⁇
  • the DMRS port included in CDM group 2 is ⁇ 2,3 ⁇
  • the DMRS port included in CDM group 3 is ⁇ 4,5 ⁇ ;
  • CDM group 1 contains DMRS ports ⁇ 0,1,6,7 ⁇
  • CDM group 2 contains DMRS ports ⁇ 2,3,8,9 ⁇
  • CDM group 3 contains DMRS ports Is ⁇ 4,5,10,11 ⁇ .
  • the QCL relationship is used to indicate that multiple antenna ports have one or more identical or similar communication characteristics. For example, if two antenna ports have a quasi co-location relationship, then the large-scale characteristics of the channel for one antenna port to transmit a signal can be inferred from the large-scale characteristics of the channel for the other antenna port to transmit a signal. For two antenna ports with a QCL relationship, the signals corresponding to the two antenna ports have the same parameters; or, the parameters of one antenna port can be used to determine the parameters of the other antenna port that has a QCL relationship with the antenna port; Or, the parameter difference between the two antenna ports is less than a preset threshold.
  • the above parameters may include one or more of the following large-scale channel parameters: delay spread, Doppler spread, Doppler shift, average delay (average delay). ), average gain, spatial reception parameters (spatial Rx parameters).
  • the TCI state contains parameters for configuring the quasi co-location relationship between the downlink reference signal and the DMRS port.
  • the TCI state can be configured with a downlink reference signal having a quasi co-location relationship with the DMRS port, and a quasi co-location type.
  • the quasi co-location type is associated with at least one channel large-scale parameter.
  • the channel large-scale parameters associated with quasi co-location type A include ⁇ Doppler shift, Doppler spread, average delay, and delay spread ⁇ .
  • the large-scale parameters of the channel associated with the quasi co-location type B include ⁇ Doppler frequency shift, Doppler spread ⁇ .
  • network equipment can use RRC signaling to configure multiple TCI states for the terminal, and use activation instructions to map 8 TCI states to codepoints in the TCI domain in DCI, so that one value (or codepoint) can correspond to a TCI state. For example, taking the TCI field with 3 bits as an example, when the codepoint of the TCI field is 000, the TCI field can indicate TCI state #1; when the codepoint of the TCI field is 111, the TCI field can indicate TCI state #2.
  • A/B can mean A or B.
  • the "and/or” in this article is only an association relationship describing the associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone These three situations.
  • “at least one” means one or more
  • “plurality” means two or more. The words “first” and “second” do not limit the quantity and order of execution, and the words “first” and “second” do not limit the difference.
  • instructions can include direct instructions and indirect instructions, as well as explicit instructions and implicit instructions.
  • the information indicated by a certain piece of information (the first indication information and the second indication information as described below) is referred to as information to be indicated.
  • the information to be indicated may be directly indicated, wherein the information to be indicated itself or the index of the information to be indicated, etc.
  • the information to be indicated can also be indicated indirectly by indicating other information, where there is an association relationship between the other information and the information to be indicated.
  • it is also possible to realize the indication of specific information by means of the pre-arranged order (for example, stipulated by the agreement) of each information, thereby reducing the indication overhead to a certain extent.
  • the technical solutions provided by the embodiments of this application can be applied to various communication systems, for example, a new radio (NR) communication system that adopts the fifth generation (5G) communication technology, a future evolution system, or multiple communication integrations System and so on.
  • the technical solution provided by this application can be applied to a variety of application scenarios, such as machine to machine (M2M), macro and micro communications, enhanced mobile broadband (eMBB), ultra-high reliability and ultra-low latency Scenarios such as communication (ultra-reliable&low latency communication, uRLLC) and massive Internet of Things communication (massive machine type communication, mMTC).
  • M2M machine to machine
  • eMBB enhanced mobile broadband
  • uRLLC ultra-high reliability and ultra-low latency Scenarios
  • mMTC massive Internet of Things communication
  • These scenarios may include, but are not limited to: a communication scenario between a communication device and a communication device, a communication scenario between a network device and a network device, a communication scenario between a network device and a communication device, and so on.
  • a communication scenario between a communication device and a communication device a communication scenario between a network device and a network device
  • a communication scenario between a network device and a communication device and so on.
  • the application in the communication scenario between the network device and the terminal is taken as an example.
  • Figure 1 shows a schematic diagram of the architecture of a communication system to which the technical solution provided by this application is applicable.
  • the communication system may include one or more network devices (only two are shown in Figure 1) and one or more terminals ( Only one is shown in Figure 1). Among them, multiple network devices can communicate with the same terminal using CoMP technology.
  • FIG. 2 shows a schematic diagram of the architecture of a communication system to which the technical solution provided by the present application is applicable.
  • the communication system may include one or more network devices (only one is shown in FIG. 2) and one or more terminals (Only one is shown in Figure 2).
  • the network device is equipped with multiple antenna panels, and the multiple antenna panels of the network device can communicate with the same terminal using CoMP technology.
  • FIGS. 1 and 2 are only schematic diagrams, and do not limit the application scenarios of the technical solutions provided in this application.
  • the network device may be a base station or a base station controller for wireless communication.
  • the base station may include various types of base stations, such as: micro base stations (also referred to as small stations), macro base stations, relay stations, access points, etc., which are not specifically limited in the embodiment of the present application.
  • the base station may be a base station (BTS) in the global system for mobile communication (GSM), code division multiple access (CDMA), and broadband
  • BTS base station
  • GSM global system for mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • eNB or e-NodeB evolutional node B
  • LTE long term evolution
  • eNB Internet of Things
  • NB-IoT narrowband-internet of things
  • PLMN public land mobile network
  • the device used to implement the function of the network device may be a network device, or a device capable of supporting the network device to implement the function, such as a chip system.
  • the device for implementing the functions of the network equipment is the network equipment as an example to describe the technical solutions provided by the embodiments of the present application.
  • the network equipment mentioned in this application usually includes a baseband unit (BBU), a remote radio unit (RRU), an antenna, and a feeder for connecting the RRU and the antenna.
  • BBU baseband unit
  • RRU remote radio unit
  • the BBU is used for signal modulation.
  • RRU is used for radio frequency processing.
  • the antenna is responsible for the conversion between the guided wave on the cable and the space wave in the air.
  • the distributed base station greatly shortens the length of the feeder between the RRU and the antenna, which can reduce signal loss, and can also reduce the cost of the feeder.
  • RRU plus antenna is relatively small and can be installed anywhere, making network planning more flexible.
  • all the BBUs can also be centralized and placed in the Central Office (CO).
  • CO Central Office
  • decentralized BBUs are centralized and turned into a BBU baseband pool, they can be managed and scheduled uniformly, and resource allocation is more flexible.
  • all physical base stations evolved into virtual base stations. All virtual base stations share the user's data transmission and reception, channel quality and other information in the BBU baseband pool, and cooperate with each other to realize joint scheduling.
  • a base station may include a centralized unit (centralized unit, CU for short) and a distributed unit (DU).
  • the base station may also include an active antenna unit (AAU for short).
  • the CU implements part of the functions of the base station, and the DU implements some of the functions of the base station.
  • the CU is responsible for processing non-real-time protocols and services, and implements functions of radio resource control (radio resource control, RRC) and packet data convergence protocol (PDCP).
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • the DU is responsible for processing physical layer protocols and real-time services, and realizes the functions of radio link control (radio link control, RLC), media access control (MAC), and physical (PHY) layer.
  • AAU realizes some physical layer processing functions, radio frequency processing and related functions of active antennas.
  • the network device may be a device that includes one or more of a CU node, a DU node, and an AAU node.
  • the CU can be divided into network devices in the RAN, or the CU can be divided into network devices in a core network (core network, CN for short), which is not limited here.
  • the terminal is a device with wireless transceiver function.
  • the terminal can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on the water (such as a ship, etc.); it can also be deployed in the air (such as aeroplane, balloon, satellite, etc.).
  • the terminal equipment may be user equipment (UE).
  • the UE includes a handheld device with a wireless communication function, a vehicle-mounted device, a wearable device, or a computing device.
  • the UE may be a mobile phone, a tablet computer, or a computer with wireless transceiver function.
  • Terminal equipment can also be virtual reality (VR) terminal equipment, augmented reality (augmented reality, AR) terminal equipment, wireless terminals in industrial control, wireless terminals in unmanned driving, wireless terminals in telemedicine, and smart Wireless terminals in power grids, wireless terminals in smart cities, wireless terminals in smart homes, and so on.
  • the device for implementing the function of the terminal may be a terminal, or a device capable of supporting the terminal to implement the function, such as a chip system.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the device used to implement the functions of the terminal is a terminal as an example to describe the technical solutions provided by the embodiments of the present application.
  • Figure 3 is a schematic diagram of the hardware structure of a network device and a terminal provided by an embodiment of the application.
  • the terminal includes at least one processor 101 and at least one transceiver 103.
  • the terminal may further include an output device 104, an input device 105, and at least one memory 102.
  • the processor 101, the memory 102, and the transceiver 103 are connected by a bus.
  • the processor 101 may be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs used to control the execution of the program of this application. integrated circuit.
  • the processor 101 may also include multiple CPUs, and the processor 101 may be a single-CPU processor or a multi-CPU processor.
  • the processor here may refer to one or more devices, circuits, or processing cores for processing data (for example, computer program instructions).
  • the memory 102 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions
  • the dynamic storage device can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be used by a computer
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM compact disc read-only memory
  • optical disc storage including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.
  • magnetic disk storage media or other magnetic storage devices or can be used to carry or store desired program codes in the form of instructions or data structures and can be used by a computer
  • the memory 102 may exist independently and is connected to the processor 101 through a bus.
  • the memory 102 may also be integrated with the processor 101.
  • the memory 102 is used to store application program codes for executing the solutions of the present application, and the processor 101 controls the execution.
  • the processor 101 is configured to execute the computer program code stored in the memory 102, so as to implement the method provided in the embodiment of the present application.
  • the transceiver 103 can use any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. .
  • the transceiver 103 includes a transmitter Tx and a receiver Rx.
  • the output device 104 communicates with the processor 101 and can display information in a variety of ways.
  • the output device 104 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait.
  • the input device 105 communicates with the processor 101 and can receive user input in a variety of ways.
  • the input device 105 may be a mouse, a keyboard, a touch screen device, or a sensor device.
  • the network device includes at least one processor 201, at least one memory 202, at least one transceiver 203, and at least one network interface 204.
  • the processor 201, the memory 202, the transceiver 203, and the network interface 204 are connected by a bus.
  • the network interface 204 is used to connect to the core network device through a link (for example, an S1 interface), or to connect to a network interface of another network device through a wired or wireless link (for example, an X2 interface) (not shown in the figure), The embodiment of the application does not specifically limit this.
  • a link for example, an S1 interface
  • a wired or wireless link for example, an X2 interface
  • a DMRS port indication method provided in this embodiment of the application includes the following steps:
  • the network device sends first indication information to the terminal.
  • the terminal receives the first indication information sent by the network device.
  • the network device may be any one or more of TRPs used to send data to the terminal.
  • the first indication information is used to indicate N TCI states, and N is a positive integer.
  • the first indication information may indicate N TCI states in a display manner.
  • the first indication information includes N TCI states.
  • the first indication information may indicate the N TCI states in an implicit manner.
  • the communication system is pre-configured with the corresponding relationship between the first indication information and the TCI state.
  • the correspondence between the first indication information and the TCI state can be referred to Table 2.
  • the first indication information when the first indication information is 000, the first indication information is used to indicate the TCI status corresponding to TRP1 and the TCI status corresponding to TRP2. At this time, the number of TCI states indicated by the first indication information is 2.
  • the first indication information is 011, the first indication information is used to indicate the TCI state corresponding to TRP2. At this time, the number of TCI states indicated by the first indication information is 1.
  • the corresponding relationship between the first indication information and the TCI state may be pre-configured, or configured by the network device through signaling.
  • the signaling may be semi-static signaling and/or dynamic signaling.
  • the semi-static signaling may be radio resource control (RRC) signaling, broadcast messages, system messages, or medium access control (MAC) control elements, CE).
  • RRC radio resource control
  • MAC medium access control
  • CE medium access control
  • the broadcast message may include remaining minimum system information (RMSI).
  • the dynamic signaling may be physical layer signaling.
  • the physical layer signaling may be signaling carried by a physical control channel or signaling carried by a physical data channel.
  • the physical data channel may be PDSCH.
  • the physical control channel can be a physical downlink control channel (PDCCH), an enhanced physical downlink control channel (EPDCCH), a narrowband physical downlink control channel (NPDCCH), or a machine type. Communication physical downlink control channel (machine type communication physical downlink control channel, MPDCCH).
  • the signaling carried by the PDCCH or EPDCCH may also be referred to as downlink control information (downlink control information, DCI).
  • the physical control channel may also be a physical sidelink control channel (physical sidelink control channel), and the signaling carried by the physical sidelink control channel may also be called sidelink control information (SCI).
  • the network device sends second indication information to the terminal.
  • the terminal receives the second indication information sent by the network device.
  • the second indication information is used to indicate at least one group of DMRS configuration information. Specifically, the second indication information is used to indicate the DMRS configuration information corresponding to the number of different TCI states.
  • a group of DMRS configuration information in this application is not limited to a specific concept, multiple DMRS configuration information can be regarded as one group, and the division between groups is only a logical division, which can be configured for different TCI states Division of the situation.
  • the at least one set of DMRS configuration information indicated by the second indication information includes: a set of DMRS configuration information corresponding to when the number of TCI states is 1, a set of DMRS configuration information corresponding to when the number of TCI states is 2, and so on , A group of DMRS configuration information corresponding to when the number of TCI states is n.
  • the at least one set of DMRS configuration information indicated by the second indication information includes: a set of DMRS configuration information corresponding to when the number of TCI states is less than a first threshold, and a set of corresponding DMRS configuration information when the number of TCI states is greater than or equal to the first threshold DMRS configuration information.
  • the at least one set of DMRS configuration information indicated by the second indication information includes: a set of DMRS configuration information corresponding to when the number of TCI states is greater than the second threshold, and one set corresponding to when the number of TCI states is less than or equal to the second threshold.
  • Group DMRS configuration information includes: a set of DMRS configuration information corresponding to when the number of TCI states is less than a first threshold, and a set of corresponding DMRS configuration information when the number of TCI states is greater than or equal to the first threshold DMRS configuration information.
  • the at least one set of DMRS configuration information indicated by the second indication information includes: a set of DMRS configuration information corresponding to when the number of TCI states is 1, and a set of DMRS configuration information corresponding to when the number of TCI states is greater than one.
  • the DMRS configuration information corresponding to the number of different TCI states may be the same or different, and the embodiment of the present application is not limited to this.
  • the DMRS configuration information is stored in the DMRS port indication table
  • at least one group of DMRS configuration information indicated by the second indication information may be stored in the same DMRS port indication table at the same time, or the second indication information
  • the indicated at least one group of DMRS configuration information may be stored in different DMRS port indication tables.
  • the DMRS configuration information is used to indicate M DMRS ports.
  • the DMRS configuration information includes the port numbers of M DMRS ports, and M is a positive integer.
  • the DMRS configuration information further includes: the number of DMRS CDM groups not used for data mapping, and/or the number of preamble symbols.
  • the DMRS configuration information may also include other parameters, which are not listed here in the embodiment of the application.
  • the terminal can default to the maximum number of CDM groups or the number of CDM groups actually occupied by the DMRS port as not used for mapping data The number of DMRS CDM groups. If the DMRS configuration information does not include: the number of preamble symbols, the terminal can default the number of preamble symbols to 1, or other parameters.
  • the network device may independently send the first indication information and the second indication information respectively, or may jointly send the first indication information and the second indication information.
  • the first indication information and the second indication information may be carried in the same DCI
  • the first indication information may be multiplexed with the TCI field in the current DCI
  • the second indication Information can be reused in the antenna port field in the current DCI to achieve backward compatibility and simplify system design.
  • the terminal determines a corresponding set of DMRS configuration information from at least one set of DMRS configuration information indicated by the second indication information according to the number of TCI states indicated by the first indication information.
  • the second indication information and the DMRS configuration information may have different correspondences.
  • the corresponding relationship between the number of TCI states indicated by the first indication information, the second indication information, and the DMRS configuration information may refer to the following Table 3.
  • the value of the second indication information in Table 3 may also be referred to as an index value, which is not limited in the embodiment of the present application.
  • the second indication information when the value of the second indication information is 0, the second indication information is used to indicate two sets of DMRS configuration information, the first set of DMRS configuration information includes DMRS port #0, and the second set of DMRS configuration The information includes DMRS port #0 and DMRS port #2.
  • the second indication information is used to indicate two sets of DMRS configuration information.
  • the first set of DMRS configuration information includes DMRS port #1, and the second set of DMRS configuration information includes DMRS port #1 and DMRS. Port #3.
  • the corresponding relationship between the number of TCI states indicated by the first indication information, the second indication information, and the DMRS configuration information may also be specifically implemented as one of the following situations:
  • the number of TCI states indicated by the first indication information is used to determine the first preset correspondence. It can be understood that different numbers of TCI states correspond to different first preset correspondences.
  • the first preset correspondence is a one-to-one correspondence between the second indication information and the DMRS configuration information.
  • the first preset correspondence can refer to Table 1.
  • the first preset correspondence relationship can refer to Table 4. It can be understood that the first preset correspondence shown in Table 1 or Table 4 is only an example, and does not limit the solutions provided in the embodiments of the present application.
  • the second indication information is used to determine the second preset correspondence relationship. It can be understood that the second indication information with different values corresponds to different second preset correspondences.
  • the second preset correspondence is a one-to-one correspondence between the number of TCI states and the DMRS configuration information.
  • the second preset correspondence relationship may refer to Table 5.
  • the second preset correspondence can refer to Table 6. It can be understood that the second preset correspondence shown in Table 5 or Table 6 is only an example, and does not limit the solutions provided in the embodiments of the present application.
  • the DMRS configuration information and other contents are described in detail below in conjunction with the specific schemes of multiple TRPs transmitting data to the terminal.
  • Table 7 shows DMRS configuration information and corresponding explanations under various transmission schemes. Table 7 can also be replaced with Table 8. It should be noted that in Table 7 or Table 8, a column corresponding to the transmission scheme may not be reflected in the protocol. That is, the DMRS port indication table defined by the protocol may not include the content of a column corresponding to the transmission scheme in Table 7 or Table 8.
  • the letter v is generally used in the protocol to indicate the number of transmission layers, so #of layers in Table 7 and Table 8 can be replaced with v.
  • the same row of DMRSport in the table can be indicated by the same Value, and the TCI status, time domain resource, frequency domain resource, redundancy version and other information corresponding to the next DMRS port are obtained from other configuration information.
  • Other configuration information may be indicated by high-level signaling such as RRC, MAC CE, etc., or may be indicated by other fields in the DCI, such as the redundancy version indication field. "->" means the corresponding relationship.
  • Resource 1 refers to a piece of resource, such as a time-frequency resource.
  • RB set1 and RB set2 are examples of frequency domain resources
  • resource block (resource block) is a way of representing frequency domain resources.
  • Frequency domain resources can also be subcarriers, resource block groups (RB group, RBG), precoding resource blocks (Precoding resource block), subband (subband), bandwidth part (bandwidth part), system bandwidth, carrier (carrier), Serving cell, etc.
  • Slot 1, slot 2 are examples of time domain resources, and slot is a time slot.
  • Time domain resources can also be symbols, mini-slots (that is, units containing one or more symbols), half-slots, half-frames, sub-frames, frames, system frames, radio frames, etc.
  • Solution 1 Multiple TRPs occupy the same time-frequency resource to send different data to the terminal.
  • NJT Non-Coherent Joint Transmission
  • different data specifically refers to: different transmission blocks, or different code words, or different transmission streams.
  • the signals from multiple TRPs experience different channel large-scale parameters, that is, the signals from multiple TRPs are non-QCL.
  • the DMRS ports corresponding to two TRPs are code-divided, that is, the DMRS ports corresponding to the two TRPs are in the same CDM group, the DMRS of the two TRPs will interfere with each other, affecting the terminal's reception of the DMRS, thereby affecting the demodulation performance.
  • the embodiment of the present application provides that when multiple TRPs transmit PDSCHs on the same time-frequency resource, multiple DMRS ports in a CDM group belong to the same TRP. In other words, the DMRS ports corresponding to different TRPs belong to different CDM groups.
  • the DMRS antenna ports corresponding to different TRPs can be the same or different; the DMRS antenna ports corresponding to different TRPs They can belong to the same CDM group or different CDM groups.
  • the number of TCI states is greater than 2 and the DMRS ports included in the corresponding DMRS configuration information belong to different CDM groups.
  • the DMRS configuration information corresponding to the number of TCI states greater than 2 includes DMRS ports in different CDM groups.
  • the number of TCI states is K and the DMRS ports included in the DMRS configuration information corresponding to K belong to at least K different CDM groups.
  • the number of TCI states is that the DMRS configuration information corresponding to K includes at least K DMRS ports in the CDM group, and K is an integer greater than 1.
  • the corresponding set of DMRS configuration information includes DMRS port #0 and DMRS port #1.
  • DMRS port #0 corresponds to TCI state #1, or in other words, TRP1 uses DMRS port #0.
  • DMRS port #1 corresponds to TCI state #2, in other words, TRP2 uses DMRS port #1.
  • DMRS port #0 and DMRS port #1 belong to different CDM groups, for example, DMRS port #0 belongs to CDM group #0, and DMRS port #1 belongs to CDM group #1.
  • the first indication information is used to indicate TCI status #1 corresponding to TRP1, and TCI status #2 corresponding to TRP2; at this time, in the groups of DMRS configuration information indicated by the second indication information, the number of TCI statuses is 2
  • the corresponding DMRS configuration information includes DMRS port #0, DMRS port #1, and DMRS port #2.
  • DMRS port #0 corresponds to TCI state #1, or in other words, TRP1 uses DMRS port #0.
  • DMRS port #1 and DMRS port #2 correspond to TCI state #2, in other words, TRP2 uses DMRS port #1 and DMRS port #2.
  • DMRS port #0 belongs to CDM group #0
  • DMRS port #1 belongs to CDM group #1
  • DMRS port #2 belongs to CDM group #2.
  • DMRS port #0 belongs to CDM group #0
  • DMRS port #1 and DMRS port #2 belong to CDM group #1.
  • the number of transmission layers is equal to the number of port numbers of DMRS ports indicated by the DMRS configuration information.
  • the DMRS configuration information includes the port numbers of two DMRS ports. Therefore, the number of transmission layers is equal to 2.
  • Solution 2 Multiple TRPs occupy the same time-frequency resources to send the same data to the terminal. Moreover, the redundancy versions used by the data sent by multiple TRPs may be different.
  • multiple TRPs send data to the terminal in a space division multiplexing (SDM) manner.
  • SDM space division multiplexing
  • the N TCI states indicated by the first indication information may include a first TCI state and a second TCI state; wherein, the first TCI state may be among the N TCI states Any one of; the second TCI state is the other TCI state except the first TCI state among the N TCI states.
  • the first indication information is used to indicate TCI status #1, TCI status #2, and TCI status #3. If TCI state #1 is the first TCI state, then TCI state #2 and TCI state #3 are both the second TCI state.
  • the first TCI state corresponds to M first DMRS ports; the second TCI state corresponds to M second DMRS ports.
  • the M first DMRS ports are configured by the corresponding set of DMRS configuration information (that is, the set of DMRS configuration information determined in step S103).
  • the M second DMRS ports are configured based on the correspondence between the M second DMRS ports and the M first DMRS ports.
  • the correspondence between the M second DMRS ports and the M first DMRS ports is referred to as DMRS port correspondence for short in the following.
  • the DMRS port correspondence can be pre-configured or configured by the network device through signaling.
  • the DMRS port correspondence relationship can be 0-2; 1-3. That is, DMRS port #0 corresponds to DMRS port #2, and DMRS port #1 corresponds to DMRS port #3.
  • the DMRS port correspondence relationship may be: a correspondence relationship between a DMRS port in one CDM group and a DMRS port in another CDM group.
  • a DMRS port with a sequence number of i in a CDM group corresponds to a DMRS port with a sequence number of i in another CDM group, and i is a natural number.
  • the sorting rule may be that each DMRS port in the CDM group is sorted according to the port number from small to large; or, the sorting rule may also be that each DMRS port in the CDM group is sorted according to the port number from large to small.
  • the DMRS port included in CDM group #1 is ⁇ 0,1 ⁇
  • the DMRS port included in CDM group #2 is ⁇ 2,3 ⁇
  • the DMRS port included in CDM group #3 is Is ⁇ 4,5 ⁇ .
  • the terminal can determine TCI status #1->port0, and TCI status #2->port 2. That is, the terminal can determine that TCI state #1 corresponds to DMRS port #0, and TCI state #2 corresponds to DMRS port #2.
  • each TCI state corresponds to can be determined according to factors such as actual scenarios and pre-configuration.
  • Tables 7 and 8 only give examples and do not constitute specific limitations. For example, it can be defined in Table 7 that when the value of the second indication information is 13, TCI status #1->port2, TCI status #2->port0.
  • the terminal can determine TCI status #1->port0,1, and TCI status #2->port 2,3. That is, the terminal can determine that TCI state #1 corresponds to DMRS port #0 and DMRS port #1, and TCI state #2 corresponds to DMRS port #2 and DMRS port #3.
  • a TRP can correspond to a TCI state.
  • the terminal determines the DMRS port and other information of the data transmitted by the multiple TRPs according to the second indication information and the DMRS port correspondence, that is, the terminal determines the multiple DMRS ports according to the second indication information and the DMRS port correspondence, and the TCI status corresponding to the DMRS port .
  • the terminal can also determine the correspondence between the DMRS port and the redundancy version.
  • the terminal can determine that TCI status #1 corresponds to DMRS port #0 and DMRS port #1, and TCI status #2 corresponds to DMRS port #2 and DMRS port #3.
  • the terminal can also determine the redundancy version corresponding to DMRS port #0 and DMRS port #1, which is different from the redundancy version corresponding to DMRS port #2 and DMRS port #3.
  • the DMRS configuration information includes multiple sets of port numbers, and each set of port numbers corresponds to a TRP. It can be understood that a set of port numbers includes at least one port number.
  • the DMRS configuration information includes port numbers ⁇ 0,1,2,3 ⁇ , where DMRS port #0 and DMRS port #1 are a group of DMRS Ports, DMRS port #2 and DMRS port #3 are another type of DMRS port. In this way, the terminal can determine TCI status #1->port 0,1, and TCI status #2->port 2,3.
  • a part of the DMRS ports indicated by the DMRS configuration information corresponds to the TCI status of the first TRP, and the data corresponding to this part of the DMRS ports adopts the first redundancy version;
  • DMRS configuration The other part of the DMRS port indicated by the information corresponds to the TCI state of the second TRP, and the data corresponding to this part of the DMRS port adopts the second redundancy version.
  • the first redundancy version is different from the second redundancy version.
  • the number of transmission layers is equal to the number of DMRS ports used by a TRP. Described in conjunction with Table 7, taking the value of the second indication information as 13 as an example, TCI state #1->port0, that is, TRP1 uses DMRS port 0. Since TRP1 only uses one DMRS port, the number of transmission layers is 1.
  • Solution 3 Multiple TRPs occupy the same time-frequency resources to send the same data to the terminal.
  • the redundancy version of the data sent by multiple TRPs is the same.
  • multiple TRPs use single frequency network (single frequency network, SFN) technology to send data to the terminal.
  • SFN single frequency network
  • multiple TRPs can use the same DMRS port.
  • one DMRS port can correspond to multiple TCI messages. Therefore, for a DMRS port, the terminal can obtain the channel parameters corresponding to each TCI information in multiple TCI information, and average the channel parameters corresponding to the multiple TCI information to determine the channel information corresponding to the DMRS port, thereby realizing data demodulation.
  • the DMRS configuration information may include the port numbers of the same multiple groups of DMRS ports. It can be understood that the port number of a group of DMRS ports includes the port number of at least one DMRS port.
  • a TRP corresponds to the port number of a group of DMRS ports.
  • the DMRS configuration information can indicate that multiple TPRs use the same DMRS port.
  • the DMRS configuration information includes the port number ⁇ 0,0,1,1 ⁇ , or the DMRS configuration information includes the port number ⁇ 0,1,0, 1 ⁇ . It can be seen that the DMRS configuration information contains the same two sets of port numbers ⁇ 0,1 ⁇ . In this way, the terminal can determine TCI status #1->port 0,1, and TCI status #2->port 0,1.
  • the DMRS configuration information may include the port number of at least one DMRS port, and the port number included in the DMRS configuration information is not repeated. In this case, multiple TRPs all use the DMRS port indicated by the DMRS configuration information.
  • the DMRS configuration information includes the port number ⁇ 0,1 ⁇ . In this case, TCI status #1->port 0,1, TCI status #2->port 0,1.
  • the multiple DMRS ports indicated by the DMRS configuration information may belong to the same CDM group or different CDM groups, which is not limited in the embodiment of the present application.
  • the number of transmission layers is equal to the number of DMRS ports used by a TPR. Described in conjunction with Table 8, taking the value of the second indication information as an example, the DMRS configuration information includes port numbers ⁇ 0,0,1,1 ⁇ , and TRP1 uses DMRS port #0 and DMRS port #1. That is, TRP1 uses two DMRS ports, so the number of transmission layers is 2.
  • Solution 4 Multiple TRPs use different frequency domain resources to send data to the terminal.
  • the data sent by multiple TRPs may be the same or different.
  • multiple TRPs send data to the terminal in a frequency division multiplexing (FDM) manner.
  • FDM frequency division multiplexing
  • the frequency domain resource corresponding to each TRP in the multiple TRPs can be configured with reference to the prior art, which will not be repeated here.
  • the network device sends DCI to the terminal to configure the frequency domain resource corresponding to each TRP in the multiple TRPs.
  • the DMRS configuration information may include the port numbers of the same multiple groups of DMRS ports. It can be understood that the port number of a group of DMRS ports includes the port number of at least one DMRS port.
  • the DMRS configuration information includes the port number ⁇ 0,0,1,1 ⁇ , or the DMRS configuration information includes the port number ⁇ 0,1,0, 1 ⁇ . It can be seen that the DMRS configuration information contains the same two sets of port numbers ⁇ 0,1 ⁇ . In this way, the terminal can determine TCI status #1->port 0,1, and TCI status #2->port 0,1.
  • the DMRS configuration information may include the port number of at least one DMRS port, and the port number included in the DMRS configuration information is not repeated. In this case, multiple TRPs all use the DMRS port indicated by the DMRS configuration information.
  • the DMRS configuration information includes the port number ⁇ 0,1 ⁇ . In this case, TCI status #1->port 0,1, TCI status #2->port 0,1.
  • the DMRS ports of different TRPs use different frequency domain resources.
  • Table 7 taking the value of the second indication information as 7 as an example, TCI status #1->port 0->RB set 1, TCI status #2->port 0->RB set 2. That is, the frequency domain resource used by DMRS port #0 corresponding to TCI state #1 is RB set 1, and the frequency domain resource used by DMRS port #0 corresponding to TCI state #2 is RB set 2.
  • the number of transmission layers is equal to the number of DMRS ports used by one TPR. Described in conjunction with Table 8. Taking the value of the second indication information as 9 as an example, the DMRS configuration information includes port numbers ⁇ 0,0,1,1 ⁇ , and TRP1 uses DMRS port #0 and DMRS port #1. That is, TRP1 uses two DMRS ports, so the number of transmission layers is 2.
  • Scheme 5 Multiple TRPs use different time domain resources to send data to the terminal.
  • the data sent by multiple TRPs may be the same or different.
  • multiple TRPs send data to the terminal in a time division multiplexing (TDM) manner.
  • TDM time division multiplexing
  • the time domain resource corresponding to each TRP in the multiple TRPs can be configured with reference to the prior art, which will not be repeated here.
  • the network device sends DCI to the terminal to configure the time domain resource corresponding to each TRP in the multiple TRPs.
  • the DMRS configuration information may include the port numbers of the same multiple groups of DMRS ports. It can be understood that the port number of a group of DMRS ports includes the port number of at least one DMRS port.
  • the DMRS configuration information includes the port number ⁇ 0,0,1,1 ⁇ , or the DMRS configuration information includes the port number ⁇ 0,1,0, 1 ⁇ . It can be seen that the DMRS configuration information contains the same two sets of port numbers ⁇ 0,1 ⁇ .
  • the terminal can determine TCI state #1->port 0,1, and TCI state #2->port 0,1.
  • the DMRS configuration information may include the port number of at least one DMRS port, and the port number included in the DMRS configuration information is not repeated. In this case, multiple TRPs all use the DMRS port indicated by the DMRS configuration information.
  • the DMRS configuration information includes the port number ⁇ 0,1 ⁇ . In this case, TCI status #1->port 0,1, TCI status #2->port 0,1.
  • the DMRS ports of different TRPs use different time domain resources.
  • An example is described in conjunction with Table 7. Taking the value of the second indication information as 10 as an example, TCI status #1->port 0->slot 1, TCI status #2->port 0->slot 2. That is, the time domain resource used by DMRS port #0 corresponding to TCI state #1 is slot 1, and the time domain resource used by DMRS port #0 corresponding to TCI state #2 is slot 2.
  • the number of transmission layers is equal to the number of DMRS ports used by one TPR. It is described in conjunction with Table 8. Taking the value of the second indication information as 12 as an example, the DMRS configuration information includes port numbers ⁇ 0,0,1,1 ⁇ , and TRP1 uses DMRS port #0 and DMRS port #1. That is, TRP1 uses two DMRS ports, so the number of transmission layers is 2.
  • the corresponding group of DMRS configuration information when the number of TCI states is K includes port numbers of K groups of DMRS ports.
  • the port numbers of the K groups of DMRS ports have a one-to-one correspondence with the K TCI states.
  • the port numbers of the K groups of DMRS ports are the same, and K is a positive integer.
  • the corresponding group of DMRS configuration information when the number of TCI states is K includes the port number of a group of DMRS ports, and the port number of this group of DMRS ports corresponds to In K TCI states.
  • each network element such as a network device and a terminal
  • each network element includes a corresponding hardware structure or software module for performing each function, or a combination of both.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation. The following is an example of dividing each function module corresponding to each function:
  • FIG. 5 is a schematic structural diagram of a terminal provided by an embodiment of the application.
  • the terminal includes: a communication module 301 and a processing module 302.
  • the communication module 301 is used to support the terminal to perform steps S101 and S102 in FIG. 4, or used to support other processes of the technical solution described herein.
  • the processing module 302 is used to support the terminal to perform step S103 in FIG. 4, or used to support other processes of the technical solution described herein.
  • the communication module 301 in FIG. 5 may be implemented by the transceiver 103 in FIG. 3, and the processing module 302 in FIG. 5 may be implemented by the processor 101 in FIG. 3.
  • the embodiment of the application does not impose any limitation on this.
  • the embodiment of the present application also provides a computer-readable storage medium in which computer instructions are stored; when the computer-readable storage medium runs on the terminal shown in FIG. 3, the terminal is caused to execute The method shown in Figure 4.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or may include one or more data storage devices such as servers and data centers that can be integrated with the medium.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium, or a semiconductor medium (for example, a solid state disk (SSD)).
  • the embodiment of the present application also provides a computer program product containing computer instructions, which when it runs on the terminal shown in FIG. 3, enables the terminal to execute the method shown in FIG. 4.
  • the terminals, computer storage media, and computer program products provided in the above embodiments of the present application are all used to execute the methods provided above. Therefore, the beneficial effects that can be achieved can refer to the corresponding beneficial effects of the methods provided above. This will not be repeated here.
  • FIG. 6 is a schematic structural diagram of a network device provided by an embodiment of this application.
  • the network device includes a processing module 401 and a communication module 402.
  • the processing module 401 is configured to generate first instruction information and second instruction information.
  • the communication module 402 is used to support the network device to perform steps S101 and S102 in FIG. 4, or used to support other processes of the technical solution described herein.
  • the communication module 402 in FIG. 6 may be implemented by the transceiver 203 in FIG. 3, and the processing module 401 in FIG. 6 may be implemented by the processor 201 in FIG. 3
  • the embodiments of this application do not impose any restriction on this.
  • the embodiment of the present application also provides a computer-readable storage medium in which computer instructions are stored; when the computer-readable storage medium runs on the network device shown in FIG. 3, the network The device executes the method shown in Figure 4.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or may include one or more data storage devices such as servers, data centers, etc. that can be integrated with the medium.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium, or a semiconductor medium (for example, a solid-state hard disk
  • the embodiment of the present application also provides a computer program product containing computer instructions, when it runs on the network device shown in FIG. 3, the network device can execute the method shown in FIG. 4.
  • the network devices, computer storage media, and computer program products provided in the above embodiments of the present application are all used to execute the methods provided above. Therefore, the beneficial effects that can be achieved can refer to the corresponding beneficial effects of the methods provided above. I will not repeat them here.
  • FIG. 7 is a schematic structural diagram of a chip provided by an embodiment of the application.
  • the chip shown in Figure 7 may be a general-purpose processor or a dedicated processor.
  • the chip includes a processor 501.
  • the processor 501 is used to support the communication device to execute the technical solution shown in FIG. 4.
  • the chip further includes a transceiver pin 502, which is used to receive control of the processor 501 and used to support the communication device to execute the technical solution shown in FIG. 4.
  • the chip shown in FIG. 7 may further include: a storage medium 503.
  • the chip shown in Figure 7 can be implemented using the following circuits or devices: one or more field programmable gate arrays (FPGA), programmable logic devices (PLD) , Controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits capable of performing the various functions described throughout this application.
  • FPGA field programmable gate arrays
  • PLD programmable logic devices
  • Controllers state machines
  • gate logic discrete hardware components
  • discrete hardware components any other suitable circuits, or any combination of circuits capable of performing the various functions described throughout this application.

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Abstract

一种DMRS端口的指示方法及装置，涉及通信技术领域，用于有效地使终端获知多个TRP所采用的DMRS端口，并且能够降低信令的传输开销。该方法包括：终端接收网络设备发送的第一指示信息和第二指示信息；其中，第一指示信息用于指示N个TCI状态，第二指示信息用于指示至少一组DMRS配置信息，DMRS配置信息包括M个DMRS端口的端口号；根据第一指示信息所指示的TCI状态的个数，从第二指示信息所指示的至少一组DMRS配置信息中，确定一组DMRS配置信息。

Description

DMRS端口的指示方法及装置
本申请要求于2019年03月30日提交国家知识产权局、申请号为201910254199.3、申请名称为“DMRS端口的指示方法及装置”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，尤其涉及解调参考信号(demodulation reference signal，DMRS)端口的指示方法及装置。
背景技术
为了获得更高的频谱利用率，通信系统一般采用同频组网的方式。也即，网络中的多个小区可以部署在同一频段。这样一来，当用户处于服务小区的边缘时，用户可能会受到服务小区的邻小区的同频干扰，严重限制了边缘用户的服务质量和吞吐量。因此，为了解决小区之间的干扰问题，协助多点(Coordinated Multi-Point，CoMP)传输技术得到广泛的应用。协助多点传输技术具体是指，多个传输点(transmission reception point，TRP)协同参与为一个终端传输数据，或者多个TRP联合接收一个终端发送的数据。
在多个TRP协同参与为一个终端传输数据的场景下，终端需要知道各个TRP采用的DMRS端口，以便于对多个TRP发送的数据进行解调。由于多个TRP所采用的DMRS端口具有较多的方案，若沿用当前的DMRS端口指示方式，需要增加DMRS端口指示信息的比特，从而导致信令的传输开销较大。
发明内容
本申请提供一种DMRS端口的指示方法及装置，用于有效的指示多个TRP所采用的DMRS端口，减少信令的传输开销。
第一方面，提供一种DMRS端口的指示方法，包括：终端接收第一指示信息和第二指示信息；其中，第一指示信息用于指示N个传输配置指示(transmission configuration indication，TCI)状态；第二指示信息用于指示至少一组DMRS配置信息，一组DMRS配置信息包括M个DMRS端口的端口号，M、N均为正整数；终端根据第一指示信息所指示的TCI状态的个数，从第二指示信息所指示的至少一组DMRS配置信息中，确定对应的一组DMRS配置信息。基于该技术方案，对于不同的TCI状态的个数，第二指示信息对应不同的DMRS配置信息。也就是说，以TCI状态的个数以及第二指示信息联合指示DMRS配置信息，在相同的比特下，第二指示信息可以指示更多的DMRS配置信息。这样一来，不需增加第二指示信息(也即DMRS端口指示信息)的比特，也可以有效的指示多个TRP所采用的DMRS端口，有利于减少信令的传输开销。
第二方面，提供一种DMRS端口的指示方法，包括：网络设备生成第一指示信息和第二指示信息，第一指示信息用于指示N个TCI状态；第二指示信息用于指示至少一组DMRS配置信息，DMRS配置信息包括M个DMRS端口的端口号；第一指示信 息所指示的TCI状态的个数用于从第二指示信息所指示的至少一组DMRS配置信息中确定一组DMRS配置信息；N、M均为正整数；之后，网络设备向终端发送第一指示信息和第二指示信息。
结合第一方面和第二方面，一种可能的设计中，第一指示信息所指示的TCI状态的个数用于确定第一预设对应关系，第一预设对应关系为DMRS配置信息与第二指示信息之间的对应关系。
结合第一方面和第二方面，一种可能的设计中，第二指示信息用于确定第二预设对应关系，第二预设对应关系为DMRS配置信息与TCI状态的个数之间的对应关系。
结合第一方面和第二方面，一种可能的设计中，第二指示信息所指示的至少一组DMRS配置信息中，TCI状态个数大于1对应的一组DMRS配置信息所指示的DMRS端口属于不同码分复用(code division multiplexing，CDM)组。这样一来，在多个TRP以相干传输技术向终端发送数据的场景下，能够避免多个TRP所采用的DMRS端口之间的互相干扰。
结合第一方面和第二方面，一种可能的设计中，第一指示信息所指示的N个TCI状态包括第一TCI状态和第二TCI状态；所述第一TCI状态对应M个第一DMRS端口；其中，所述M个第一DMRS端口由所述对应的一组DMRS配置信息来配置；第二TCI状态对应M个第二DMRS端口；其中，所述M个第二DMRS端口基于所述M个第二DMRS端口与所述M个第一DMRS端口之间的对应关系来配置。这样一来，在多个TRP采用空分复用的方式向终端发送数据的场景下，由于一组DMRS配置信息仅指示一个TRP对应的DMRS端口，因此可以简化DMRS配置信息的设计。
结合第一方面和第二方面，一种可能的设计中，在第二指示信息所指示的至少一组DMRS配置信息中，TCI状态个数为K对应的一组DMRS配置信息包括K组DMRS端口的端口号，K组DMRS端口的端口号与K个TCI状态是一一对应的，K组DMRS端口的端口号是相同的，K为正整数。
结合第一方面和第二方面，一种可能的设计中，一组DMRS配置信息还包括：不用于映射数据的CDM组的个数、和/或前置符号的个数。
第三方面，提供一种终端，包括：处理模块和通信模块。其中，通信模块，用于接收第一指示信息和第二指示信息；其中，第一指示信息用于指示N个TCI状态；第二指示信息用于指示至少一组DMRS配置信息，一组DMRS配置信息包括M个DMRS端口的端口号，M、N均为正整数。处理模块，用于根据第一指示信息所指示的TCI状态的个数，从第二指示信息所指示的至少一组DMRS配置信息中，确定一组DMRS配置信息。
一种可能的设计中，第一指示信息所指示的TCI状态的个数用于确定第一预设对应关系，第一预设对应关系为DMRS配置信息与第二指示信息之间的对应关系。
一种可能的设计中，第二指示信息用于确定第二预设对应关系，第二预设对应关系为DMRS配置信息与TCI状态的个数之间的对应关系。
一种可能的设计中，第二指示信息所指示的至少一组DMRS配置信息中，TCI状态个数大于1对应的一组DMRS配置信息所指示的DMRS端口属于不同CDM组。
一种可能的设计中，第一指示信息所指示的N个TCI状态包括第一TCI状态和第 二TCI状态；所述第一TCI状态对应M个第一DMRS端口；其中，所述M个第一DMRS端口由所述对应的一组DMRS配置信息来配置；第二TCI状态对应M个第二DMRS端口；其中，所述M个第二DMRS端口基于所述M个第二DMRS端口与所述M个第一DMRS端口之间的对应关系来配置。
一种可能的设计中，在第二指示信息所指示的至少一组DMRS配置信息中，TCI状态个数为K对应的一组DMRS配置信息包括K组DMRS端口的端口号，K组DMRS端口的端口号与K个TCI状态是一一对应的，K组DMRS端口的端口号是相同的，K为正整数。
一种可能的设计中，一组DMRS配置信息还包括：不用于映射数据的CDM组的个数、和/或前置符号的个数。
第四方面，提供一种终端，包括：处理器，所述处理器用于与存储器耦合，并读取存储器中的指令，并根据所述指令实现如上述第一方面所述的DMRS端口的指示方法。
第五方面，提供一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当其在终端上运行时，使得终端可以执行上述第一方面或第三方面所述的DMRS端口的指示方法。
第六方面，提供一种包含指令的计算机程序产品，当其在通信装置上运行时，使得终端可以执行上述第一方面或第三方面所述的DMRS端口的指示方法。
第七方面，提供一种芯片，该芯片包括处理模块和通信接口，通信接口用于将接收的代码指令传输至处理模块，处理模块用于运行所述代码指令支持终端执行上述第一方面所述的DMRS端口的指示方法。该代码指令可以来自芯片内部的存储器，也可以来自芯片外部的存储器。可选的，处理模块可以为该芯片上集成的处理器或者微处理器或者集成电路。通信接口可以为芯片上的输入输出电路或者收发管脚。
第八方面，提供一种网络设备，包括：处理模块和通信模块。其中，处理模块，用于生成第一指示信息和第二指示信息，第一指示信息用于指示N个TCI状态；第二指示信息用于指示至少一组DMRS配置信息，DMRS配置信息包括M个DMRS端口的端口号；第一指示信息所指示的TCI状态的个数用于从第二指示信息所指示的至少一组DMRS配置信息中确定对应的一组DMRS配置信息；N、M均为正整数；通信模块，用于向终端发送第一指示信息和第二指示信息。
一种可能的设计中，第一指示信息所指示的TCI状态的个数用于确定第一预设对应关系，第一预设对应关系为DMRS配置信息与第二指示信息之间的对应关系。
一种可能的设计中，第二指示信息用于确定第二预设对应关系，第二预设对应关系为DMRS配置信息与TCI状态的个数之间的对应关系。
一种可能的设计中，第二指示信息所指示的至少一组DMRS配置信息中，TCI状态个数大于1对应的一组DMRS配置信息所指示的DMRS端口属于不同CDM组。
一种可能的设计中，第一指示信息所指示的N个TCI状态包括第一TCI状态和第二TCI状态；所述第一TCI状态对应M个第一DMRS端口；其中，所述M个第一DMRS端口由所述对应的一组DMRS配置信息来配置；第二TCI状态对应M个第二DMRS端口；其中，所述M个第二DMRS端口基于所述M个第二DMRS端口与所述 M个第一DMRS端口之间的对应关系来配置。
一种可能的设计中，在第二指示信息所指示的至少一组DMRS配置信息中，TCI状态个数为K对应的一组DMRS配置信息包括K组DMRS端口的端口号，K组DMRS端口的端口号与K个TCI状态是一一对应的，K组DMRS端口的端口号是相同的，K为正整数。
一种可能的设计中，一组DMRS配置信息还包括：不用于映射数据的CDM组的个数、和/或前置符号的个数。
第九方面，提供一种网络设备，包括：处理器，所述处理器用于与存储器耦合，并读取存储器中的指令，并根据所述指令实现如上述第二方面所述的DMRS端口的指示方法。
第十方面，提供一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当其在网络设备上运行时，使得网络设备可以执行上述第二方面所述的DMRS端口的指示方法。
第十一方面，提供一种包含指令的计算机程序产品，当其在通信装置上运行时，使得网络设备可以执行上述第二方面所述的DMRS端口的指示方法。
第十二方面，提供一种芯片，该芯片包括处理模块和通信接口，通信接口用于将接收的代码指令传输至处理模块，处理模块用于运行所述代码指令支持网络设备执行上述第二方面所述的DMRS端口的指示方法。该代码指令可以来自芯片内部的存储器，也可以来自芯片外部的存储器。可选的，处理模块可以为该芯片上集成的处理器或者微处理器或者集成电路。通信接口可以为芯片上的输入输出电路或者收发管脚。
第十三方面，提供一种通信系统，包括网络设备和终端。所述终端用于执行第一方面所述的方法，所述网络设备用于执行第二方面所述的方法。
其中，第三方面至第十三方面中任一种设计方式所带来的技术效果可参见上文所提供的对应的方法中的有益效果同设计方式所带来的技术效果，此处不再赘述。
附图说明
图1为本申请实施例提供的一种通信系统的架构示意图；
图2为本申请实施例提供的另一种通信系统的架构示意图；
图3为本申请实施例提供的一种终端和网络设备的硬件结构示意图；
图4为本申请实施例提供的一种DMRS端口的指示方法的流程图；
图5为本申请实施例提供的一种终端的结构示意图；
图6为本申请实施例提供的一种网络设备的结构示意图；
图7为本申请实施例提供的一种芯片的结构示意图。
具体实施方式
为了便于理解本申请的技术方案，下面先对本申请所涉及的术语进行简单介绍。
1、天线端口
天线端口可以理解为，可以被接收端设备所识别的发射天线，或者在空间上可以区分的发射天线。天线端口可以根据与该天线端口相关联的参考信号(或者说，导频信号)进行定义。一个天线端口可以是发射端设备上的一根物理天线，也可以是发射端设备上多根物理天线的加权组合。在本申请实施例中，在未作出特别说明的情况下， 一个天线端口对应一个参考信号。
天线端口用于承载具体的物理信道，物理信号中至少一种。以DMRS端口为例，DMRS端口即为承载DMRS的天线端口。通过相同天线端口所发送的信号，无论这些信号是否是通过相同或不同的物理天线发送，这些信号在空间传输所经历的路径所对应的信道可视为相同或者相关。也就是说，在相同的天线端口所发送的信号，接收端在解调时可以认为其信道相同或者相关。也就是说，天线端口定义了在某个符号上的信道。若两个符号的天线端口一样，则在一个符号上的信道可以通过另一个符号上的信道推知。
在本申请实施例中，以端口号来唯一标识天线端口。端口号还可以有其他名称，例如端口索引、端口标识等，本申请实施例不限于此。在以端口号唯一标识天线端口的情况下，端口号还可以经过函数的变化来唯一识别端口。例如，指示终端使用的端口号作为函数的输入，实际使用此天线端口的标识作为函数的输出。所述函数具有输入输出一一映射的关系。例如，所述函数为一个常数加上输入作为输出。所述实际使用此天线端口的标识可以作为生成该天线端口的信号的标识。例如，生成该天线端口的序列的标识，其中可以包括生成序列的伪随机函数初始化因子的标识。
另外，为了便于描述，DMRS端口#X即表示端口号为X的DMRS端口。一组DMRS端口可以表示为{x1，x2，……，xn}。例如，{1,2}即表示该组DMRS端口为DMRS端口#1和DMRS端口#2。
2、DMRS
DMRS用于实现物理下行共享信道(physical downlink shared channel，PDSCH)的解调。DMRS承载于PDSCH(或者时间单元)中的部分正交频分复用(orthogonal frequency division multiplexing，OFDM)符号上。另外，网络设备会配置PDSCH(或者时间单元)以靠前位置的OFDM符号承载前置的(Front-load)DMRS，以便于终端能够尽快进行用户检测和信道估计等操作，减少解调的时延。
在本申请实施例中，承载front-load DMRS的OFDM符号可以简称为前置符号(front-load symbols)。前置符号的个数可以为1个，也可以为2个，本申请实施例不限于此。
DMRS类型(type)可以分为type1和type2。DMRS类型与资源图样存在对应关系，资源图样用于指示承载DMRS的资源粒子(resource element，RE)的位置。需要说明的是，DMRS类型可以由高层参数DL-DMRS-config-type来配置。
当前，3GPP R15协议中，DMRS端口的指示信息可以为DCI中的天线端口域(antenna port field)。通信系统预先配置了DMRS端口指示表，该DMRS端口指示表用于存储多组DMRS配置信息。antenna port field的取值即为DMRS端口指示表中DMRS配置信息的索引值，也即antenna port field的每一个取值对应一组DMRS配置信息。
其中，一组DMRS配置信息可以包括一个或多个配置信息，例如一组DMRS配置信息可以包括DMRS端口的端口号、不用于映射数据的DMRS CDM组的个数、和/或前置符号的个数。
示例性的，DMRS端口指示表可参考下表1。在表1中，DMRS类型为类型2， DMRS所占据的符号的最大长度为1。表1示出了antenna port field的取值(也即索引值)与一组DMRS配置信息之间的对应关系。在表1中，一组DMRS配置信息对应一个索引值所标识的一行。
示例性的，结合表1进行说明，当使能码字0，不使能码字1时，若antenna port field的取值为0，DMRS配置信息指示了DMRS端口的端口号为0，不映射数据的DMRS CDM组的个数为1，以及前置符号的数目为1。
表1
Figure PCTCN2020081767-appb-000001
Figure PCTCN2020081767-appb-000002
3、CDM组
CDM组包含多个天线端口，同一CDM组中的多个天线端口复用相同的时频资源，并且同一CDM组中的多个天线端口之间以码分的形式来区分，也即同一CDM中多个天线端口的序列的码域资源是不同的。所述码域资源通常是正交的码，例如正交覆盖码(Orthogonal Cover Code，OCC)等。所述OCC码可用于时域、频域、空域(波束域)等。
在本申请实施例中，CDM组具体是指DMRS CDM组，也即CDM组包含多个DMRS端口。CDM组可以由高层信令配置，具体内容可参见现有技术，在此不再赘述。
下面以举例的方式来说明CDM组。
对于1符号DMRS类型1，CDM组1包含的DMRS端口为{0,1}，CDM组2包含的DMRS端口为{2,3}；
对于2符号DMRS类型1，CDM组1包含的DMRS端口为{0,1,4,5}，CDM组2包含的DMRS端口为{2,3,6,7}；
对于1符号DMRS类型2，CDM组1包含的DMRS端口为{0,1}，CDM组2包含的DMRS端口为{2,3}，CDM组3包含的DMRS端口为{4,5}；
对于2符号DMRS类型2，CDM组1包含的DMRS端口为{0,1,6,7}，CDM组2包含的DMRS端口为{2,3,8,9}，CDM组3包含的DMRS端口为{4,5,10,11}。
4、准共址关系
QCL关系用于表示多个天线端口之间具有一个或多个相同或者相类似的通信特征。例如，如果两个天线端口具有准共址关系，那么一个天线端口发送一个信号的信道大尺度特性可以从另一个天线端口发送一个信号的信道大尺度特性推断出来。对于具有QCL关系的两个天线端口来说，两个天线端口对应的信号中具有相同的参数；或者，一个天线端口的参数可用于确定与该天线端口具有QCL关系的另一个天线端口的参数；又或者，两个天线端口间的参数差小于预设阈值。
其中，上述参数可以包括以下一项或多项信道大尺度参数：时延扩展(delay spread)，多普勒扩展(Doppler spread)，多普勒频移(Doppler shift)，平均时延(average delay)，平均增益，空间接收参数(spatial Rx parameters)。
5、TCI状态(state)
TCI状态包含用于配置下行参考信号和DMRS端口之间准共址关系的参数。具体的，TCI状态可以配置与DMRS端口之间具有准共址关系的下行参考信号，以及准共址类型。
其中，准共址类型关联至少一个信道大尺度参数。例如，准共址类型A所关联的信道大尺度参数包括{多普勒频移，多普勒扩展，平均时延，时延扩展}。准共址类型B所关联的信道大尺度参数包括{多普勒频移，多普勒扩展}。
当前，网络设备可以采用RRC信令为终端配置多个TCI状态，并且以激活指令将8个TCI状态映射到DCI中TCI域中的代码点(codepoint)，从而TCI域的一个取值(或者说codepoint)可以对应一个TCI状态。例如以TCI域为3个比特为例，当TCI 域的codepoint为000时，TCI域可以指示TCI状态#1；当TCI域的codepoint为111，TCI域可以指示TCI状态#2。
在本申请的描述中，除非另有说明，“/”表示“或”的意思，例如，A/B可以表示A或B。本文中的“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。此外，“至少一个”是指一个或多个，“多个”是指两个或两个以上。“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。
需要说明的是，本申请中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其他实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
在本申请的描述中，“指示”可以包括直接指示和间接指示，也可以包括显式指示和隐式指示。将某一信息(如下文所述的第一指示信息、第二指示信息)所指示的信息称为待指示信息，则具体实现过程中，对所述待指示信息进行指示的方式有很多种。例如，可以直接指示所述待指示信息，其中所述待指示信息本身或者所述待指示信息的索引等。又例如，也可以通过指示其他信息来间接指示所述待指示信息，其中该其他信息与所述待指示信息之间存在关联关系。又例如，还可以仅仅指示所述待指示信息的一部分，而所述待指示信息的其他部分则是已知的或者提前约定的。另外，还可以借助预先约定(例如协议规定)的各个信息的排列顺序来实现对特定信息的指示，从而在一定程度上降低指示开销。
本申请实施例提供的技术方案可以应用于各种通信系统，例如，采用第五代(5th generation，5G)通信技术的新空口(new radio，NR)通信系统，未来演进系统或者多种通信融合系统等等。本申请提供的技术方案可以应用于多种应用场景，例如，机器对机器(machine to machine，M2M)、宏微通信、增强型移动互联网(enhanced mobile broadband，eMBB)、超高可靠超低时延通信(ultra-reliable&low latency communication，uRLLC)以及海量物联网通信(massive machine type communication，mMTC)等场景。这些场景可以包括但不限于：通信设备与通信设备之间的通信场景，网络设备与网络设备之间的通信场景，网络设备与通信设备之间的通信场景等。下文中均是以应用于网络设备和终端之间的通信场景中为例进行说明的。
图1示出了本申请提供的技术方案所适用的一种通信系统的架构示意图，通信系统可以包括一个或多个网络设备(图1中仅示出了2个)以及一个或多个终端(图1中仅示出了一个)。其中，多个网络设备可以以CoMP技术与同一个终端进行通信。
图2示出了本申请提供的技术方案所适用的一种通信系统的架构示意图，该通信系统可以包括一个或多个网络设备(图2中仅示出了1个)以及一个或多个终端(图2中仅示出了一个)。其中，网络设备配置了多个天线面板，网络设备的多个天线面板可以以CoMP技术与同一个终端进行通信。
需要说明的是，图1和图2仅为示意图，并不对本申请提供的技术方案的适用场景构成限定。
网络设备可以是无线通信的基站或基站控制器等。例如，所述基站可以包括各种 类型的基站，例如：微基站(也称为小站)，宏基站，中继站，接入点等，本申请实施例对此不作具体限定。在本申请实施例中，所述基站可以是全球移动通信系统(global system for mobile communication，GSM)，码分多址(code division multiple access，CDMA)中的基站(base transceiver station，BTS)，宽带码分多址(wideband code division multiple access，WCDMA)中的基站(node B)，长期演进(long term evolution，LTE)中的演进型基站(evolutional node B，eNB或e-NodeB)，物联网(internet of things，IoT)或者窄带物联网(narrow band-internet of things，NB-IoT)中的eNB，未来5G移动通信网络或者未来演进的公共陆地移动网络(public land mobile network，PLMN)中的基站，本申请实施例对此不作任何限制。本申请实施例中，用于实现网络设备的功能的装置可以是网络设备，也可以是能够支持网络设备实现该功能的装置，例如芯片系统。在本申请实施例中，以用于实现网络设备的功能的装置是网络设备为例，描述本申请实施例提供的技术方案。
本申请所说的网络设备，例如基站，通常包括基带单元(baseband unit，BBU)、射频拉远单元(remote radio unit，RRU)、天线、以及用于连接RRU和天线的馈线。其中，BBU用于负责信号调制。RRU用于负责射频处理。天线用于负责线缆上导行波和空气中空间波之间的转换。一方面，分布式基站大大缩短了RRU和天线之间馈线的长度，可以减少信号损耗，也可以降低馈线的成本。另一方面，RRU加天线比较小，可以随地安装，让网络规划更加灵活。除了RRU拉远之外，还可以把BBU全部都集中起来放置在中心机房(Central Office，CO)，通过这种集中化的方式，可以极大减少基站机房数量，减少配套设备，特别是空调的能耗，可以减少大量的碳排放。此外，分散的BBU集中起来变成BBU基带池之后，可以统一管理和调度，资源调配更加灵活。这种模式下，所有的实体基站演变成了虚拟基站。所有的虚拟基站在BBU基带池中共享用户的数据收发、信道质量等信息，相互协作，使得联合调度得以实现。
在一些部署中，基站可以包括集中式单元(centralized unit，简称CU)和分布式单元(Distributed Unit，简称DU)。基站还可以包括有源天线单元(active antenna unit，简称AAU)。CU实现基站的部分功能，DU实现基站的部分功能。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，简称RRC)，分组数据汇聚层协议(packet data convergence protocol，简称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，简称RLC)、媒体接入控制(media access control，简称MAC)和物理(physical，简称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层信令或PDCP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，CU可以划分为RAN中的网络设备，也可以将CU划分为核心网(core network，简称CN)中的网络设备，在此不做限制。
终端是一种具有无线收发功能的设备。终端可以被部署在陆地上，包括室内或室外、手持或车载；也可以被部署在水面上(如轮船等)；还可以被部署在空中(例如飞机、气球和卫星上等)。终端设备可以是用户设备(user equipment，UE)。其中， UE包括具有无线通信功能的手持式设备、车载设备、可穿戴设备或计算设备。示例性地，UE可以是手机(mobile phone)、平板电脑或带无线收发功能的电脑。终端设备还可以是虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制中的无线终端、无人驾驶中的无线终端、远程医疗中的无线终端、智能电网中的无线终端、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。本申请实施例中，用于实现终端的功能的装置可以是终端，也可以是能够支持终端实现该功能的装置，例如芯片系统。本申请实施例中，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件。本申请实施例中，以用于实现终端的功能的装置是终端为例，描述本申请实施例提供的技术方案。
此外，本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
图3为本申请实施例提供的网络设备和终端的硬件结构示意图。
终端包括至少一个处理器101和至少一个收发器103。可选的，终端还可以包括输出设备104、输入设备105和至少一个存储器102。
处理器101、存储器102和收发器103通过总线相连接。处理器101可以是一个通用中央处理器(central processing unit，CPU)、微处理器、特定应用集成电路(application-specific integrated circuit，ASIC)，或者一个或多个用于控制本申请方案程序执行的集成电路。处理器101也可以包括多个CPU，并且处理器101可以是一个单核(single-CPU)处理器或多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路或用于处理数据(例如计算机程序指令)的处理核。
存储器102可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备、随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，本申请实施例对此不作任何限制。存储器102可以是独立存在，通过总线与处理器101相连接。存储器102也可以和处理器101集成在一起。其中，存储器102用于存储执行本申请方案的应用程序代码，并由处理器101来控制执行。处理器101用于执行存储器102中存储的计算机程序代码，从而实现本申请实施例提供的方法。
收发器103可以使用任何收发器一类的装置，用于与其他设备或通信网络通信，如以太网、无线接入网(radio access network，RAN)、无线局域网(wireless local area networks，WLAN)等。收发器103包括发射机Tx和接收机Rx。
输出设备104和处理器101通信，可以以多种方式来显示信息。例如，输出设备104可以是液晶显示器(liquid crystal display，LCD)，发光二级管(light emitting diode， LED)显示设备，阴极射线管(cathode ray tube，CRT)显示设备，或投影仪(projector)等。输入设备105和处理器101通信，可以以多种方式接收用户的输入。例如，输入设备105可以是鼠标、键盘、触摸屏设备或传感设备等。
网络设备包括至少一个处理器201、至少一个存储器202、至少一个收发器203和至少一个网络接口204。处理器201、存储器202、收发器203和网络接口204通过总线相连接。其中，网络接口204用于通过链路(例如S1接口)与核心网设备连接，或者通过有线或无线链路(例如X2接口)与其它网络设备的网络接口进行连接(图中未示出)，本申请实施例对此不作具体限定。另外，处理器201、存储器202和收发器203的相关描述可参考终端中处理器101、存储器102和收发器103的描述，在此不再赘述。
下面结合说明书附图，对本申请实施例所提供的技术方案进行具体介绍。
如图4所示，为本申请实施例提供的一种DMRS端口的指示方法，该方法包括以下步骤：
S101、网络设备向终端发送第一指示信息。相应的，终端接收网络设备发送的第一指示信息。
可以理解的是，网络设备可以是用于向终端发送数据的TRP中的任意一个或者多个。
其中，所述第一指示信息用于指示N个TCI状态，N为正整数。
作为一种实现方式，第一指示信息可以以显示的方式指示N个TCI状态。例如，第一指示信息包括N个TCI状态。
作为另一种实现方式，第一指示信息可以以隐式的方式指示N个TCI状态。例如，通信系统预先配置了第一指示信息与TCI状态的对应关系。
示例性的，以第一指示信息包含3个比特为例，第一指示信息与TCI状态的对应关系可以参考表2。参见表2，当第一指示信息为000时，第一指示信息用于指示TRP1对应的TCI状态，以及TRP2对应的TCI状态。此时，第一指示信息所指示的TCI状态的个数为2。当第一指示信息为011时，第一指示信息用于指示TRP2对应的TCI状态。此时，第一指示信息所指示的TCI状态的个数为1。
表2
Figure PCTCN2020081767-appb-000003
可以理解的是，对于终端来说，第一指示信息与TCI状态的对应关系可以是预配 置的，或者是网络设备通过信令配置的。在本申请实施例中，信令可以是半静态信令和/或动态信令。
在本申请实施例中，半静态信令可以是无线资源控制(radio resource control，RRC)信令、广播消息、系统消息、或媒体接入控制(medium access control，MAC)控制元素(control element，CE)。其中，广播消息可以包括剩余最小系统消息(remaining minimum system information，RMSI)。
在本申请实施例中，动态信令可以是物理层信令。物理层信令可以是物理控制信道携带的信令或者物理数据信道携带的信令。其中，物理数据信道可以是PDSCH。物理控制信道可以是物理下行控制信道(physical downlink control channel，PDCCH)、增强物理下行控制信道(enhanced physical downlink control channel，EPDCCH)、窄带物理下行控制信道(narrowband physical downlink control channel，NPDCCH)或机器类通信物理下行控制信道(machine type communication physical downlink control channel，MPDCCH)。其中，PDCCH或EPDCCH携带的信令还可以称为下行控制信息(downlink control information，DCI)。物理控制信道还可以是物理副链路控制信道(physical sidelink control channel)，物理副链路控制信道携带的信令还可以称为副链路控制信息(sidelink control information，SCI)。
S102、网络设备向终端发送第二指示信息。相应的，终端接收网络设备发送的第二指示信息。
其中，所述第二指示信息用于指示至少一组DMRS配置信息。具体的说，所述第二指示信息用于指示不同TCI状态的个数所对应的DMRS配置信息。
需要说明的是，本申请中一组DMRS配置信息并非限定为特定概念，多个DMRS配置信息可以视为一组，多组之间的划分仅是逻辑上的划分，可以为针对不同TCI状态配置情况下的划分。
例如，第二指示信息所指示的至少一组DMRS配置信息包括：TCI状态个数为1时对应的一组DMRS配置信息，TCI状态个数为2时对应的一组DMRS配置信息，以此类推，TCI状态个数为n时对应的一组DMRS配置信息。
又例如，第二指示信息所指示的至少一组DMRS配置信息包括：TCI状态个数小于第一阈值时对应的一组DMRS配置信息，和TCI状态个数大于等于第一阈值时对应的一组DMRS配置信息。换句话说，第二指示信息所指示的至少一组DMRS配置信息包括：TCI状态个数大于第二阈值时对应的一组DMRS配置信息，和TCI状态个数小于等于第二阈值时对应的一组DMRS配置信息。举例来说，第二指示信息所指示的至少一组DMRS配置信息包括：TCI状态个数为1时对应的一组DMRS配置信息，以及TCI状态个数大于1时对应的一组DMRS配置信息。
可以理解的是，不同TCI状态个数对应的DMRS配置信息可以是相同的，也可以是不相同的，本申请实施例不限于此。
作为一种实现方式，若以DMRS端口指示表来存储DMRS配置信息，则第二指示信息所指示的至少一组DMRS配置信息可以同时存储于同一DMRS端口指示表中，或者，第二指示信息所指示的至少一组DMRS配置信息可以分别存储于不同的DMRS端口指示表中。
在本申请实施例中，DMRS配置信息用于指示M个DMRS端口。或者说，DMRS配置信息包括M个DMRS端口的端口号，M为正整数。
可选的，DMRS配置信息还包括：不用于映射数据的DMRS CDM组的个数，和/或前置符号的个数。当然，DMRS配置信息还可以包括其他参数，本申请实施例在此不一一列举。
需要说明的是，若DMRS配置信息不包括：不用于映射数据的DMRS CDM组的个数，则终端可以默认最大CDM组的个数或者DMRS端口实际占用的CDM组的个数为不用于映射数据的DMRS CDM组的个数。若DMRS配置信息不包括：前置符号的个数，则终端可以默认前置符号的个数为1，或者其他参数。
对于步骤S101和步骤S102来说，网络设备可以分别独立发送第一指示信息和第二指示信息，也可以联合发送第一指示信息和第二指示信息。
以网络设备联合发送第一指示信息和第二指示信息为例，第一指示信息和第二指示信息可以承载于同一DCI中，第一指示信息可以复用当前DCI中的TCI域，第二指示信息可以复用当前DCI中的antenna port域，从而实现向后兼容，简化系统设计。
S103、终端根据第一指示信息所指示的TCI状态的个数，从第二指示信息所指示的至少一组DMRS配置信息中，确定对应的一组DMRS配置信息。
在本申请实施例中，第一指示信息所指示的TCI状态的个数、第二指示信息、以及DMRS配置信息存在对应关系。具体的说，对于不同的TCI状态个数，第二指示信息与DMRS配置信息可以有不同的对应关系。
示例性的，第一指示信息所指示的TCI状态的个数、第二指示信息、以及DMRS配置信息之间的对应关系可以参考下述表3。表3中第二指示信息的取值也可以称为索引值，本申请实施例对此不作限定。
表3
Figure PCTCN2020081767-appb-000004
结合表3进行示例性说明，当第二指示信息的取值为0时，第二指示信息用于指示两组DMRS配置信息，第一组DMRS配置信息包含DMRS端口#0，第二组DMRS配置信息包含DMRS端口#0和DMRS端口#2。当第二指示信息的取值为1时，第二指示信息用于指示两组DMRS配置信息，第一组DMRS配置信息包含DMRS端口#1，第二组DMRS配置信息包含DMRS端口#1和DMRS端口#3。这样一来，若网络设备向终端发送的第一指示信息所指示的TCI状态的个数为1，第二指示信息的取值为0，则终端能够确定DMRS配置信息包含DMRS端口#0。
可选的，第一指示信息所指示的TCI状态的个数、第二指示信息、以及DMRS配置信息之间的对应关系还可以具体实现为以下情形之一：
(1)、第一指示信息所指示的TCI状态的个数用于确定第一预设对应关系。可以 理解的是，不同的TCI状态个数对应不同的第一预设对应关系。
其中，第一预设对应关系为第二指示信息与DMRS配置信息之间的一一对应关系。
示例性的，当第一指示信息所指示的TCI状态的个数为1时，第一预设对应关系可以参考表1。当第一指示信息所指示的TCI状态的个数为2时，第一预设对应关系可以参考表4。可以理解的是，表1或表4所示的第一预设对应关系仅为示例，不对本申请实施例提供的方案构成限定。
表4
Figure PCTCN2020081767-appb-000005
(2)、第二指示信息用于确定第二预设对应关系。可以理解的是，不同取值的第二指示信息对应不同的第二预设对应关系。
其中，第二预设对应关系为TCI状态的个数与DMRS配置信息之间的一一对应关系。
示例性的，当第二指示信息的取值为0时，第二预设对应关系可以参考表5。当第二指示信息的取值为1时，第二预设对应关系可以参考表6。可以理解的是，表5或表6所示的第二预设对应关系仅是示例，不对本申请实施例提供的方案构成限定。
表5
TCI状态的个数 DMRS端口的端口号
1 0
2 0,2
…… ……
表6
TCI状态的个数 DMRS端口的端口号
1 1
2 1,3
…… ……
下面结合多个TRP向终端传输数据的具体方案来对DMRS配置信息等内容进行详细描述。
示例性的，假设第一指示信息用于指示TPR1对应TCI状态#1和TRP2对应TCI状态#2，表7示出了各种传输方案下，DMRS配置信息以及相应的解释。表7也可以替换为表8。需要说明的是，表7或表8中，传输方案对应的一列在协议中可以不体现。也即，协议定义的DMRS端口指示表中可以不包括表7或表8中传输方案对应的一列的内容。
另外，在表7或表8中，#of layers表示PDSCH传输的层数，例如：#of layers＝2，表示传输层的层数为2。协议中一般采用字母v来表示传输层的层数，因此表7和表8中#of layers可以替换为v。
表格中DMRSport相同的行可以用相同的Value指示，而接下来的DMRS端口对应的TCI状态、时域资源、频域资源、冗余版本等信息由其他配置信息得到。其他配置信息可以是由RRC、MAC CE等高层信令指示的，也可以是由DCI中的其他域指示的，如，冗余版本指示域。“->”是对应关系的意思。Resource 1是指一块资源，如时频资源。RB set1，RB set2是频域资源的举例，资源块(resource block)是频域资源的一种表示方式。频域资源还可以是子载波、资源块组(RB group，RBG)、预编码资源块(Precoding resource block)、子带(subband)、带宽部分(bandwidth part)、系统带宽、载波(carrier)、服务小区(serving cell)等。slot 1，slot2是时域资源的举例，slot即时隙。时域资源还可以是符号、迷你时隙(即包含一个或多个符号的单元)、半时隙、半帧、子帧、帧、系统帧、无线帧等。
可以理解的是，表7或表8仅是示例，不对本申请实施例所提供的技术方案构成限定。
表7
Figure PCTCN2020081767-appb-000006
Figure PCTCN2020081767-appb-000007
Figure PCTCN2020081767-appb-000008
表8
Figure PCTCN2020081767-appb-000009
Figure PCTCN2020081767-appb-000010
方案一、多个TRP占用相同的时频资源向终端发送不同的数据。
也就是说，多个TRP以非相干传输(Non-Coherent Joint Transmission，NCJT)技术向终端传输数据。
其中，不同的数据具体是指：不同的传输块，或者不同的码字，又或者不同的传输流。
当以NCJT技术传输数据时，来自多个TRP的信号经历了不同的信道大尺度参数，也就是说，来自多个TRP的信号是非QCL的。若两个TRP对应的DMRS端口是码分的，也即两个TRP对应的DMRS端口位于同一CDM组内，则两个TRP的DMRS会互相干扰，影响终端对于DMRS的接收，从而影响解调的性能。基于此，本申请实施例规定：多个TRP在相同时频资源传输PDSCH时，一个CDM组内的多个DMRS端口属于同一个TRP。也就是说，不同TRP对应的DMRS端口属于不同的CDM组。
需要说明的是，若多个TRP在不同时域资源(或者频域资源)传输PDSCH，则不同TRP对应的DMRS天线端口可以是一样的，也可以是不一样的；不同TRP对应的DMRS天线端口可以属于相同的CDM组，也可以属于不同的CDM组。
因此，在方案一中，在第二指示信息所指示的至少一组DMRS配置信息中，TCI状态的个数大于2对应的DMRS配置信息所包含的DMRS端口属于不同的CDM组。或者说，TCI状态的个数大于2对应的DMRS配置信息包含不同CDM组中的DMRS端口。
可选的，在第二指示信息所指示的至少一组DMRS配置信息中，TCI状态的个数为K对应的DMRS配置信息所包含的DMRS端口属于至少K个不同的CDM组。或者说，TCI状态的个数为K对应的DMRS配置信息至少包含K个CDM组中的DMRS端口，K为大于1的整数。
例如，假设第一指示信息用于指示TRP1对应的TCI状态#1，TRP2对应的TCI状态#2；此时，在第二指示信息所指示的多组DMRS配置信息中，TCI状态个数为2时对应的一组DMRS配置信息包含DMRS端口#0，DMRS端口#1。可选的，DMRS端口#0对应TCI状态#1，或者说，TRP1采用DMRS端口#0。DMRS端口#1对应TCI状态#2，或者说，TRP2采用DMRS端口#1。在这种情况下，DMRS端口#0和DMRS端口#1属于不同的CDM组，例如，DMRS端口#0属于CDM组#0，DMRS端口#1属于CDM组#1。
又例如，假设第一指示信息用于指示TRP1对应的TCI状态#1，TRP2对应的TCI状态#2；此时，在第二指示信息所指示的多组DMRS配置信息中，TCI状态个数为2对应的DMRS配置信息包含DMRS端口#0，DMRS端口#1，DMRS端口#2。可选的，DMRS端口#0对应TCI状态#1，或者说，TRP1采用DMRS端口#0。DMRS端口#1和DMRS端口#2对应TCI状态#2，或者说，TRP2采用DMRS端口#1和DMRS端口#2。示例性的，DMRS端口#0属于CDM组#0，DMRS端口#1属于CDM组#1，DMRS端口#2属于CDM组#2。或者，DMRS端口#0属于CDM组#0，DMRS端口#1和DMRS端口#2属于CDM组#1。
另外，需要说明的，在方案一中，传输层的层数等于DMRS配置信息所指示DMRS端口的端口号的个数。结合表7进行说明，当第二指示信息的取值为0，DMRS配置信息包括两个DMRS端口的端口号，因此，传输层的层数等于2。
方案二、多个TRP占用相同的时频资源向终端发送相同的数据。并且，多个TRP发送的数据所采用的冗余版本可以是不相同的。
也就是说，多个TRP以空分复用(space division multiplexing，SDM)的方式向终端发送数据。
作为一种实现方式，对于第一指示信息来说，第一指示信息所指示的N个TCI状态可以包括第一TCI状态和第二TCI状态；其中，第一TCI状态可以是N个TCI状态中的任意一个；第二TCI状态为N个TCI状态中除了第一TCI状态之外的其他TCI状态。例如，第一指示信息用于指示TCI状态#1、TCI状态#2、TCI状态#3。若以TCI状态#1为第一TCI状态，则TCI状态#2和TCI状态#3均为第二TCI状态。
第一TCI状态对应M个第一DMRS端口；第二TCI状态对应M个第二DMRS 端口。其中，所述M个第一DMRS端口由所述对应的一组DMRS配置信息(也即步骤S103所确定的一组DMRS配置信息)来配置。所述M个第二DMRS端口基于所述M个第二DMRS端口与所述M个第一DMRS端口之间的对应关系来配置。
需要说明的是，不同的第二TCI状态对应的M个第二DMRS端口是不同的。
为了便于描述，下文中M个第二DMRS端口与M个第一DMRS端口之间的对应关系简称为DMRS端口对应关系。对于终端来说，DMRS端口对应关系可以是预先配置的，也可以是网络设备通过信令来配置的。
结合表7进行说明，以第二指示信息的取值为13为例，DMRS端口对应关系可以为0-2；1-3。也即，DMRS端口#0对应DMRS端口#2，DMRS端口#1对应DMRS端口#3。
可选的，在方案二中，多个TRP所采用的DMRS端口不属于同一个CDM组。在这种情况下，DMRS端口对应关系可以为：一个CDM组内的DMRS端口与另一个CDM组内的DMRS端口之间的对应关系。例如：一个CDM组中排序序号为i的DMRS端口对应另一个CDM组中排序序号为i的DMRS端口，i为自然数。其中，排序规则可以是CDM组中各个DMRS端口按照端口号从小到大的排序；或者，排序规则还可以是CDM组中各个DMRS端口按照端口号从大到小的排序。
举例来说，对于1符号DMRS类型2来说，CDM组#1包含的DMRS端口为{0,1}，CDM组#2包含的DMRS端口{2,3}，CDM组#3包含的DMRS端口为{4,5}。可选的，DMRS端口#0、DMRS端口#2、DMRS端口#4之间存在对应关系；DMRS端口#1、DMRS端口#3、DMRS端口#5之间存在对应关系。
结合表7进行举例说明，以第二指示信息的取值为13为例，DMRS端口对应关系为0-2；1-3；DMRS配置信息包含端口号{0}。可选的，终端能够确定TCI状态#1->port0，TCI状态#2->port 2。也即，终端能够确定TCI状态#1对应DMRS端口#0，TCI状态#2对应DMRS端口#2。
需要说明的是，每一个TCI状态具体对应哪几个DMRS端口可以根据实际场景、预先配置等因素来确定。表7和表8中仅给出示例，不构成具体限定。例如，表7中可以定义，在第二指示信息的取值为13时，TCI状态#1->port2，TCI状态#2->port0。
结合表7进行举例说明，以第二指示信息的取值为15为例，DMRS端口对应关系为0-2；1-3；DMRS配置信息包含端口号{0,1}。可选的，终端能够确定TCI状态#1->port0,1，TCI状态#2->port 2,3。也即，终端能够确定TCI状态#1对应DMRS端口#0和DMRS端口#1，TCI状态#2对应DMRS端口#2和DMRS端口#3。
由于一个TRP的信号是QCL的，所以一个TRP可以对应一个TCI状态。终端根据第二指示信息和DMRS端口对应关系确定多个TRP传输的数据的DMRS端口等信息，即，终端根据第二指示信息和DMRS端口对应关系确定多个DMRS端口，以及DMRS端口对应的TCI状态。终端还可以确定DMRS端口和冗余版本的对应关系。
结合表7进行举例说明，以第二指示信息的取值为15为例，终端能够确定TCI状态#1对应DMRS端口#0和DMRS端口#1，TCI状态#2对应DMRS端口#2和DMRS端口#3。终端还能够确定DMRS端口#0和DMRS端口#1对应的冗余版本，不同于DMRS端口#2和DMRS端口#3对应的冗余版本。
作为另一种实现方式，DMRS配置信息包含多组端口号，每一组端口号对应一个TRP。可以理解的是，一组端口号包括至少一个端口号。
结合表8进行说明，以第二指示信息的取值为15为例，DMRS配置信息包括端口号{0,1,2,3}，其中，DMRS端口#0和DMRS端口#1为一组DMRS端口，DMRS端口#2和DMRS端口#3为另一种DMRS端口。这一来，终端能够确定TCI状态#1->port 0,1，TCI状态#2->port 2,3。
基于该实现方式，以两个TRP向终端传输数据为例，DMRS配置信息所指示的一部分DMRS端口对应第一TRP的TCI状态，并且这一部分DMRS端口对应的数据采用第一冗余版本；DMRS配置信息所指示的另一部分DMRS端口对应第二TRP的TCI状态，并且这一部分DMRS端口对应的数据采用第二冗余版本。第一冗余版本不同于第二冗余版本。
另外，需要说明的是，在方案二中，传输层的层数等于一个TRP所采用的DMRS端口的个数。结合表7进行说明，以第二指示信息的取值为13为例，TCI状态#1->port0，也即TRP1采用DMRS端口0。由于TRP1仅采用1个DMRS端口，因此传输层的层数为1。
方案三、多个TRP占用相同的时频资源向终端发送相同的数据。并且，多个TRP发送的数据所采用的冗余版本是相同的。
也就是说，多个TRP以单频网(single frequency network，SFN)技术向终端发送数据。
基于方案三，多个TRP可以采用相同的DMRS端口。这样一来，一个DMRS端口可以对应多个TCI信息。因此，对于一个DMRS端口，终端可以获取多个TCI信息中每一个TCI信息对应的信道参数，并将多个TCI信息对应的信道参数进行平均，以确定该DMRS端口对应的信道信息，从而实现数据解调。
作为一种实现方式，在方案三中，DMRS配置信息可以包含相同的多组DMRS端口的端口号。可以理解的是，一组DMRS端口的端口号包括至少一个DMRS端口的端口号。
一个TRP对应一组DMRS端口的端口号。这样一来，DMRS配置信息可以指示多个TPR采用相同的DMRS端口。
结合表8进行说明，以第二指示信息的取值为6为例，DMRS配置信息包含端口号{0,0,1,1}，或者，DMRS配置信息包含端口号{0,1,0,1}。可见，DMRS配置信息包含相同的两组端口号{0,1}。这样一来，终端能够确定TCI状态#1->port 0,1，TCI状态#2->port 0,1。
作为另一种实现方式，在方案三中，DMRS配置信息可以包含至少一个DMRS端口的端口号，并且该DMRS配置信息所包含的端口号不重复。在这种情况下，多个TRP均采用该DMRS配置信息所指示的DMRS端口。
结合表7进行说明，以第二指示信息的取值为6为例，DMRS配置信息包含端口号{0,1}。在这种情况下，TCI状态#1->port 0,1，TCI状态#2->port 0,1。
在方案三中，DMRS配置信息所指示的多个DMRS端口可以属于同一个CDM组，也可以属于不同的CDM组，本申请实施例对此不作限定。
需要说明的是，在方案三中，不同TRP的DMRS端口使用相同的时频资源。
另外，需要说明的是，传输层的层数等于一个TPR所采用的DMRS端口的个数。结合表8进行说明，以第二指示信息的取值为6为例，DMRS配置信息包含端口号{0,0,1,1}，TRP1采用DMRS端口#0和DMRS端口#1。也即，TRP1采用两个DMRS端口，因此传输层的层数为2。
方案四、多个TRP采用不同的频域资源向终端发送数据。可选的，多个TRP发送的数据可以是相同的，也可以是不同的。
也就是说，多个TRP以频分复用(frequency division multiplexing，FDM)的方式向终端发送数据。
需要说明的是，多个TRP中每一个TRP对应的频域资源可以参考现有技术来配置，在此不再赘述。例如，网络设备向终端发送DCI，以配置多个TRP中每一个TRP对应的频域资源。
作为一种实现方式，在方案四中，DMRS配置信息可以包含相同的多组DMRS端口的端口号。可以理解的是，一组DMRS端口的端口号包括至少一个DMRS端口的端口号。
结合表8进行说明，以第二指示信息的取值为9为例，DMRS配置信息包含端口号{0,0,1,1}，或者，DMRS配置信息包含端口号{0,1,0,1}。可见，DMRS配置信息包含相同的两组端口号{0,1}。这样一来，终端能够确定TCI状态#1->port 0,1，TCI状态#2->port 0,1。
作为另一种实现方式，在方案四中，DMRS配置信息可以包含至少一个DMRS端口的端口号，并且该DMRS配置信息所包含的端口号不重复。在这种情况下，多个TRP均采用该DMRS配置信息所指示的DMRS端口。
结合表7进行说明，以第二指示信息的取值为9为例，DMRS配置信息包含端口号{0,1}。在这种情况下，TCI状态#1->port 0,1，TCI状态#2->port 0,1。
需要说明的是，在方案四中，不同TRP的DMRS端口使用不同的频域资源。结合表7进行举例说明，以第二指示信息的取值为7为例，TCI状态#1->port 0->RB set 1，TCI状态#2->port 0->RB set 2。也就是说，TCI状态#1对应的DMRS端口#0使用的频域资源为RB set 1，TCI状态#2对应的DMRS端口#0使用的频域资源为RB set 2。
另外，需要说明的是，在方案四中，传输层的层数等于一个TPR所采用的DMRS端口的个数。结合表8进行说明，以第二指示信息的取值为9为例，DMRS配置信息包含端口号{0,0,1,1}，TRP1采用DMRS端口#0和DMRS端口#1。也即，TRP1采用两个DMRS端口，因此传输层的层数为2。
方案五、多个TRP采用不同的时域资源向终端发送数据。可选的，多个TRP发送的数据可以是相同的，也可以是不同的。
也就是说，多个TRP以时分复用(time division multiplexing，TDM)的方式向终端发送数据。
需要说明的是，多个TRP中每一个TRP对应的时域资源可以参考现有技术来配置，在此不再赘述。例如，网络设备向终端发送DCI，以配置多个TRP中每一个TRP对应的时域资源。
作为一种实现方式，在方案五中，DMRS配置信息可以包含相同的多组DMRS端口的端口号。可以理解的是，一组DMRS端口的端口号包括至少一个DMRS端口的端口号。
结合表8进行说明，以第二指示信息的取值为12为例，DMRS配置信息包含端口号{0,0,1,1}，或者，DMRS配置信息包含端口号{0,1,0,1}。可见，DMRS配置信息包含相同的两组端口号{0,1}。可选的，终端能够确定TCI状态#1->port 0,1，TCI状态#2->port0,1。
作为另一种实现方式，在方案五中，DMRS配置信息可以包含至少一个DMRS端口的端口号，并且该DMRS配置信息所包含的端口号不重复。在这种情况下，多个TRP均采用该DMRS配置信息所指示的DMRS端口。
结合表7进行说明，以第二指示信息的取值为12为例，DMRS配置信息包含端口号{0,1}。在这种情况下，TCI状态#1->port 0,1，TCI状态#2->port 0,1。
需要说明的是，在方案五中，不同TRP的DMRS端口使用不同的时域资源。结合表7进行举例说明，以第二指示信息的取值为10为例，TCI状态#1->port 0->slot 1，TCI状态#2->port 0->slot 2。也就是说，TCI状态#1对应的DMRS端口#0使用的时域资源为slot 1，TCI状态#2对应的DMRS端口#0使用的时域资源为slot 2。
另外，需要说明的是，在方案五中，传输层的层数等于一个TPR所采用的DMRS端口的个数。结合表8进行说明，以第二指示信息的取值为12为例，DMRS配置信息包含端口号{0,0,1,1}，TRP1采用DMRS端口#0和DMRS端口#1。也即，TRP1采用两个DMRS端口，因此传输层的层数为2。
下面对方案三、方案四和方案五中，一组DMRS配置信息的实现形式进行总结。
在第二指示信息所指示的至少一组DMRS配置信息中，TCI状态个数为K时对应的一组DMRS配置信息包括K组DMRS端口的端口号。K组DMRS端口的端口号与K个TCI状态是一一对应的，K组DMRS端口的端口号是相同的，K为正整数。
或者，在第二指示信息所指示的至少一组DMRS配置信息中，TCI状态个数为K时对应的一组DMRS配置信息包括一组DMRS端口的端口号，这一组DMRS端口的端口号对应于K个TCI状态。
上述主要从每一个网元之间交互的角度对本申请实施例提供的方案进行了介绍。可以理解的是，每一个网元，例如网络设备和终端，为了实现上述功能，其包含了执行每一个功能相应的硬件结构或软件模块，或两者结合。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对网络设备和终端进行功能模块的划分，例如，可以对应每一个功能划分每一个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。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。需要说明的是，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。下面以采用对应每一个功能划分每一个功能模块为例进行说明：
图5为本申请实施例提供的一种终端的结构示意图。如图5所示，终端包括：通信模块301和处理模块302。其中，通信模块301用于支持终端执行图4中的步骤S101和S102，或者用于支持本文描述的技术方案的其他过程。处理模块302用于支持终端执行图4中的步骤S103，或者用于支持本文描述的技术方案的其他过程。
作为一个示例，结合图3所示的终端，图5中的通信模块301可以由图3中的收发器103来实现，图5中的处理模块302可以由图3中的处理器101来实现，本申请实施例对此不作任何限制。
本申请实施例还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机指令；当所述计算机可读存储介质在图3所示的终端上运行时，使得该终端执行如图4所示的方法。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或者数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可以用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)，光介质、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。
本申请实施例还提供了一种包含计算机指令的计算机程序产品，当其在图3所示的终端上运行时，使得终端可以执行图4所示的方法。
上述本申请实施例提供的终端、计算机存储介质以及计算机程序产品均用于执行上文所提供的方法，因此，其所能达到的有益效果可参考上文所提供的方法对应的有益效果，在此不再赘述。
图6为本申请实施例提供的一种网络设备的结构示意图。如图6所示，网络设备包括处理模块401和通信模块402。处理模块401用于生成第一指示信息和第二指示信息。通信模块402用于支持网络设备执行图4中的步骤S101和S102，或者用于支持本文描述的技术方案的其他过程。
作为一个示例，结合图3所示的网络设备，图6中的通信模块402可以由图3中的收发器203来实现，图6中的处理模块401可以由图3中的处理器201来实现，本申请实施例对此不作任何限制。
本申请实施例还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机指令；当所述计算机可读存储介质在图3所示的网络设备上运行时，使得该网络设备执行如图4所示的方法。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或者数据中心通过有线(例如同轴电缆、光纤、数字用户线)或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可以用介质集成的服务器、数据中心等数据存 储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)，光介质、或者半导体介质(例如固态硬盘)等。
本申请实施例还提供一种包含计算机指令的计算机程序产品，当其在图3所示的网络设备上运行时，使得网络设备可以执行图4所示的方法。
上述本申请实施例提供的网络设备、计算机存储介质以及计算机程序产品均用于执行上文所提供的方法，因此，其所能达到的有益效果可参考上文所提供的方法对应的有益效果，在此不再赘述。
图7为本申请实施例提供的一种芯片的结构示意图。图7所示的芯片可以为通用处理器，也可以为专用处理器。该芯片包括处理器501。其中，处理器501用于支持通信装置执行图4所示的技术方案。
可选的，该芯片还包括收发管脚502，收发管脚502用于接受处理器501的控制，用于支持通信装置执行图4所示的技术方案。
可选的，图7所示的芯片还可以包括：存储介质503。
需要说明的是，图7所示的芯片可以使用下述电路或者器件来实现：一个或多个现场可编程门阵列(field programmable gate array，FPGA)、可编程逻辑器件(programmable logic device，PLD)、控制器、状态机、门逻辑、分立硬件部件、任何其他适合的电路、或者能够执行本申请通篇所描述的各种功能的电路的任意组合。
尽管在此结合各实施例对本申请进行了描述，然而，本领域技术人员通过查看所述附图、公开内容、以及所附权利要求书，可理解并实现所述公开实施例的其他变化。在权利要求中，“包括”(comprising)一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的情况。单个处理器或其他单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能组合起来产生良好的效果。
尽管结合具体特征及其实施例对本申请进行了描述，显而易见的，在不脱离本申请的精神和范围的情况下，可对其进行各种修改和组合。相应地，本说明书和附图仅仅是所附权利要求所界定的本申请的示例性说明，且视为已覆盖本申请范围内的任意和所有修改、变化、组合或等同物。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 (37)

  1. 一种解调参考信号DMRS端口的指示方法，其特征在于，所述方法包括：
    接收第一指示信息和第二指示信息；其中，第一指示信息用于指示N个传输配置指示TCI状态；所述第二指示信息用于指示至少一组DMRS配置信息，所述一组DMRS配置信息包括M个DMRS端口的端口号，M、N均为正整数；
    根据所述第一指示信息所指示的TCI状态的个数，从所述第二指示信息所指示的至少一组DMRS配置信息中，确定对应的一组DMRS配置信息。
  2. 根据权利要求1所述的DMRS端口的指示方法，其特征在于，所述第一指示信息所指示的TCI状态的个数用于确定第一预设对应关系，所述第一预设对应关系为DMRS配置信息与第二指示信息之间的对应关系。
  3. 根据权利要求1所述的DMRS端口的指示方法，其特征在于，所述第二指示信息用于确定第二预设对应关系，所述第二预设对应关系为DMRS配置信息与TCI状态的个数之间的对应关系。
  4. 根据权利要求1至3任一项所述的DMRS端口的指示方法，其特征在于，在所述第二指示信息所指示的至少一组DMRS配置信息中，TCI状态个数大于1对应的一组DMRS配置信息所配置的DMRS端口中至少两个DMRS端口属于不同码分复用CDM组。
  5. 根据权利要求1至3任一项所述的DMRS端口的指示方法，其特征在于，所述第一指示信息所指示的N个TCI状态包括第一TCI状态和第二TCI状态；
    所述第一TCI状态对应M个第一DMRS端口；其中，所述M个第一DMRS端口由所述对应的一组DMRS配置信息来配置；
    所述第二TCI状态对应M个第二DMRS端口；其中，所述M个第二DMRS端口基于所述M个第二DMRS端口与所述M个第一DMRS端口之间的对应关系来配置。
  6. 根据权利要求1至3任一项所述的DMRS端口的指示方法，其特征在于，在所述第二指示信息所指示的至少一组DMRS配置信息中，TCI状态个数为K时对应的一组DMRS配置信息包括K组DMRS端口的端口号，K组DMRS端口的端口号与K个TCI状态是一一对应的，K组DMRS端口的端口号是相同的，K为正整数。
  7. 根据权利要求1至6任一项所述的DMRS端口的指示方法，其特征在于，所述一组DMRS配置信息还包括：不用于映射数据的码分复用CDM组的个数、和/或前置符号的个数。
  8. 一种解调参考信号DMRS端口的指示方法，其特征在于，所述方法包括：
    生成第一指示信息和第二指示信息，第一指示信息用于指示N个传输配置指示TCI状态；所述第二指示信息用于指示至少一组DMRS配置信息，所述DMRS配置信息包括M个DMRS端口的端口号；所述第一指示信息所指示的TCI状态的个数用于从所述第二指示信息所指示的至少一组DMRS配置信息中确定对应的一组DMRS配置信息；N、M均为正整数；
    向终端发送所述第一指示信息和所述第二指示信息。
  9. 根据权利要求8所述的DMRS端口的指示方法，其特征在于，所述第一指示信息所指示的TCI状态的个数用于确定第一预设对应关系，所述第一预设对应关系为 DMRS配置信息与第二指示信息之间的对应关系。
  10. 根据权利要求8所述的DMRS端口的指示方法，其特征在于，所述第二指示信息用于确定第二预设对应关系，所述第二预设对应关系为DMRS配置信息与TCI状态的个数之间的对应关系。
  11. 根据权利要求8至10任一项所述的DMRS端口的指示方法，其特征在于，在所述第二指示信息所指示的至少一组DMRS配置信息中，TCI状态个数大于1对应的DMRS配置信息所配置的DMRS端口属于不同码分复用CDM组。
  12. 根据权利要求8至10任一项所述的DMRS端口的指示方法，其特征在于，所述第一指示信息所指示的N个TCI状态包括第一TCI状态和第二TCI状态；
    所述第一TCI状态对应M个第一DMRS端口；其中，所述M个第一DMRS端口由所述对应的一组DMRS配置信息来配置；
    所述第二TCI状态对应M个第二DMRS端口；其中，所述M个第二DMRS端口基于所述M个第二DMRS端口与所述M个第一DMRS端口之间的对应关系来配置。
  13. 根据权利要求8至10任一项所述的DMRS端口的指示方法，其特征在于，在所述第二指示信息所指示的至少一组DMRS配置信息中，TCI状态个数为K对应的一组DMRS配置信息包括K组DMRS端口的端口号，K组DMRS端口的端口号与K个TCI状态是一一对应的，K组DMRS端口的端口号是相同的，K为正整数。
  14. 根据权利要求8至13任一项所述的DMRS端口的指示方法，其特征在于，所述一组DMRS配置信息还包括：不用于映射数据的码分复用CDM组的个数、和/或前置符号的个数。
  15. 一种通信装置，其特征在于，包括：
    通信模块，用于接收第一指示信息和第二指示信息；其中，第一指示信息用于指示N个传输配置指示TCI状态；所述第二指示信息用于指示至少一组解调参考信号DMRS配置信息，所述一组DMRS配置信息包括M个DMRS端口的端口号，M、N均为正整数；
    处理模块，用于根据所述第一指示信息所指示的TCI状态的个数，从所述第二指示信息所指示的至少一组DMRS配置信息中，确定一组DMRS配置信息。
  16. 根据权利要求15所述的装置，其特征在于，所述第一指示信息所指示的TCI状态的个数用于确定第一预设对应关系，所述第一预设对应关系为DMRS配置信息与第二指示信息的取值之间的对应关系。
  17. 根据权利要求15所述的装置，其特征在于，所述第二指示信息用于确定第二预设对应关系，所述第二预设对应关系为DMRS配置信息与TCI状态的个数之间的对应关系。
  18. 根据权利要求15至17任一项所述的装置，其特征在于，在所述第二指示信息所指示的至少一组DMRS配置信息中，TCI状态个数大于1对应的一组DMRS配置信息所配置的DMRS端口中至少两个DMRS端口属于不同码分复用CDM组。
  19. 根据权利要求15至17任一项所述的装置，其特征在于，所述第一指示信息所指示的N个TCI状态包括第一TCI状态和第二TCI状态；
    所述第一TCI状态对应M个第一DMRS端口；其中，所述M个第一DMRS端口 由所述对应的一组DMRS配置信息来配置；
    所述第二TCI状态对应M个第二DMRS端口；其中，所述M个第二DMRS端口基于所述M个第二DMRS端口与所述M个第一DMRS端口之间的对应关系来配置。
  20. 根据权利要求15至17任一项所述的装置，其特征在于，在所述第二指示信息所指示的至少一组DMRS配置信息中，TCI状态个数为K对应的一组DMRS配置信息包括K组DMRS端口的端口号，K组DMRS端口的端口号与K个TCI状态是一一对应的，K组DMRS端口的端口号是相同的，K为正整数。
  21. 根据权利要求15至20任一项所述的装置，其特征在于，所述一组DMRS配置信息还包括：不用于映射数据的码分复用CDM组的个数、和/或前置符号的个数。
  22. 根据权利要求15-21任一项所述的装置，其特征在于，所述通信模块为收发器，所述处理模块为处理器。
  23. 根据权利要求15-22任一项所述的装置，其特征在于，所述装置为终端设备。
  24. 一种通信装置，其特征在于，包括：
    处理模块，用于生成第一指示信息和第二指示信息，第一指示信息用于指示N个传输配置指示TCI状态；所述第二指示信息用于指示至少一组解调参考信号DMRS配置信息，所述DMRS配置信息包括M个DMRS端口的端口号；所述第一指示信息所指示的TCI状态的个数用于从所述第二指示信息所指示的至少一组DMRS配置信息中确定对应的一组DMRS配置信息；N、M均为正整数；
    通信模块，用于向终端发送所述第一指示信息和所述第二指示信息。
  25. 根据权利要求24所述的装置，其特征在于，所述第一指示信息所指示的TCI状态的个数用于确定第一预设对应关系，所述第一预设对应关系为DMRS配置信息与第二指示信息之间的对应关系。
  26. 根据权利要求24所述的装置，其特征在于，所述第二指示信息用于确定第二预设对应关系，所述第二预设对应关系为DMRS配置信息与TCI状态的个数之间的对应关系。
  27. 根据权利要求24至26任一项所述的装置，其特征在于，在所述第二指示信息所指示的至少一组DMRS配置信息中，TCI状态个数大于1对应的DMRS配置信息所配置的DMRS端口中至少两个DMRS端口属于不同码分复用CDM组。
  28. 根据权利要求24至26任一项所述的装置，其特征在于，所述第一指示信息所指示的N个TCI状态包括第一TCI状态和第二TCI状态；
    所述第一TCI状态对应M个第一DMRS端口；其中，所述M个第一DMRS端口由所述对应的一组DMRS配置信息来配置；
    所述第二TCI状态对应M个第二DMRS端口；其中，所述M个第二DMRS端口基于所述M个第二DMRS端口与所述M个第一DMRS端口之间的对应关系来配置。
  29. 根据权利要求24至26任一项所述的装置，其特征在于，在所述第二指示信息所指示的至少一组DMRS配置信息中，TCI状态个数为K对应的一组DMRS配置信息包括K组DMRS端口的端口号，K组DMRS端口的端口号与K个TCI状态是一一对应的，K组DMRS端口的端口号是相同的，K为正整数。
  30. 根据权利要求24至29任一项所述的装置，其特征在于，所述一组DMRS配 置信息还包括：不用于映射数据的码分复用CDM组的个数、和/或前置符号的个数。
  31. 根据权利要求24-30任一项所述的装置，其特征在于，所述通信模块为收发器，所述处理模块为处理器。
  32. 根据权利要求24-31任一项所述的装置，其特征在于，所述装置为网络设备。
  33. 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存储有计算机程序，所述计算机程序包括程序指令，所述程序指令被处理器执行时使得处理器执行如权利要求1至7任一项所述的解调参考信号DMRS端口的指示方法，或者使得处理器执行如权利要求8至14任一项所述的DMRS端口的指示方法。
  34. 一种通信装置，其特征在于，包括至少一个处理器，所述处理器与存储器相连，用于执行存储于所述存储器的程序指令以实现如权利要求1至14中任一项所述的DMRS端口的指示方法。
  35. 一种通信装置，其特征在于，包括至少一个处理器和存储器，所述处理器与存储器相连，用于执行存储于所述存储器的程序指令以实现如权利要求1至14中任一项所述的DMRS端口的指示方法。
  36. 一种计算机程序产品，其特征在于，所述计算机程序产品包括程序指令，所述程序指令被处理器执行时使得处理器实现如权利要求1至14任一项所述的DMRS端口的指示方法。
  37. 一种芯片，其特征在于，所述芯片包括处理器，当所述处理器执行指令时，所述处理器用于实现权利要求1至14任一项所述的DMRS端口的指示方法。
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