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WO2017167156A1 - Dmrs的发送方法及装置 - Google Patents

Dmrs的发送方法及装置 Download PDF

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Publication number
WO2017167156A1
WO2017167156A1 PCT/CN2017/078321 CN2017078321W WO2017167156A1 WO 2017167156 A1 WO2017167156 A1 WO 2017167156A1 CN 2017078321 W CN2017078321 W CN 2017078321W WO 2017167156 A1 WO2017167156 A1 WO 2017167156A1
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WIPO (PCT)
Prior art keywords
dmrs
type
csi
ports
resource
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Ceased
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PCT/CN2017/078321
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English (en)
French (fr)
Inventor
蔡剑兴
肖华华
弓宇宏
陈艺戬
李儒岳
吴昊
鲁照华
李永
王瑜新
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ZTE Corp
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ZTE Corp
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver

Definitions

  • the present invention relates to the field of communications, and in particular to a method and an apparatus for transmitting a DMRS.
  • a transmitting end and a receiving end generally use multiple antennas for transmitting and receiving to obtain a higher rate.
  • One principle of multiple-input-multiple-output (MIMO) technology is to use some characteristics of the channel to form a multi-layer transmission of matching channel characteristics, so that it can be obtained without increasing bandwidth and power.
  • Significant performance improvements which are also widely used in current systems.
  • transmission mode 2 is Space-frequency diversity
  • transmission mode 3 is open-loop spatial multiplexing or open-loop MIMO technology
  • transmission mode 4 is closed-loop spatial multiplexing
  • transmission mode 5 is multi-user MIMO
  • transmission mode 6 is closed-loop spatial multiplexing of single data streams.
  • Transmission modes 7 and 8 respectively form single-stream and dual-stream beamforming
  • transmission mode 9 supports spatial multiplexing of up to 8 layers, and can realize adaptive switching of users and multiple users, and adaptive switching of data layers. Supports open-loop MIMO and closed-loop MIMO modes.
  • PMI Precoding Matrix Indicator
  • LTE/LTE A mainly to adapt to the channel characteristics of different users and the receiving capabilities of users. For example, for a user with one receiving antenna, it can only use MIMO technology with 1 multiplex layer. For users with faster channel changes, open-loop MIMO technology can be considered. This is because when the user moves faster, the channel The change is faster.
  • the precoding information of the closed-loop spatial multiplexing feedback cannot accurately and timely reflect the downlink channel information in the next feedback period of the base station, which may result in performance degradation.
  • the open-loop spatial multiplexing technique has better robustness because it does not need to feed back precoding information.
  • LTE/LTE A such as Release 8/Release 9
  • CRS Cell-specific Reference Signal
  • TM3 Transmission Mode 3
  • demodulation mainly considers demodulation using a method of CRS. Since CRS supports up to 4 ports, TM3 does not support more than 4 ports.
  • DMRS Demodulation Reference Signal
  • the DMRS is a UE-specific Reference Signal associated with PDSCH, that is, a UE-specific reference signal for downlink transmission.
  • the DMRS needs to be pre-coded to the antenna port. , sent out through the antenna port.
  • DMRS De Modulation Reference Signal
  • each REG uses a precoding independently, which can effectively traverse different codewords, thereby improving system performance.
  • WL is the codebook of long-term feedback
  • N11 groups each group includes M1 candidate beams, and the user selects a group index of N11 groups to feed back to the base station.
  • WS represents a short-term feedback codebook, and its function is to select one of M1 candidate beams in the WL codeword, and for each of the same data layer.
  • PMI2 the polarization direction
  • M1 the number of WS, each of which The value of N11 and M1 in the rank is different.
  • the codewords before R12 are for the 1D antenna array and belong to the 1D codeword.
  • the size of the codebook becomes larger due to the use of more antennas.
  • the topology of the antenna is also generally planar, that is, the antenna with two dimensions is designed with 2D code words.
  • each beam in the codeword WL has a form of 2-dimensional form
  • DFT Discrete Fourier Transform
  • the first dimension port (the port may include an antenna/port/port/transmission unit/array/array element, etc.), and the number of N2, the second dimension port number N2,
  • the DFT corresponding to the first dimension port is oversampled by O1
  • the DFT corresponding to the port of the second dimension is oversampled by O2
  • O1 is the first dimension oversampling factor
  • O2 is the second dimension oversampling factor.
  • PMI11 and PMI12 indexes there are M1 WS code words, and each WS code word is to select a 2-dimensional beam from WL.
  • the code word becomes a 2D code word. If it is a 1D codeword and the single codeword structure is represented by PMI or i, if it is a 1D codeword and is represented by PMI1 and PMI2 in the double codeword structure, the index is jointly represented by i1/i2, if it is a 2D codeword
  • the three codebook indexes of PMI11, PMI12, and PMI2 are collectively represented or jointly represented by indexes i11, i12, and i2.
  • the 3rd Generation Partnership Project (3GPP) also introduces the concept of channel state information (CSI) process process.
  • the base station can configure multiple CSI processes for the terminal, each CSI.
  • the process is equivalent to a channel state information measurement and feedback process.
  • Each CSI process is independent and can be parameterized separately. In transport mode 9, one process is supported, and in transport mode 10, a maximum of four processors can be supported.
  • the configuration of the channel measurement part and the configuration of the interference measurement part and the feedback mode are defined in the configuration of each CSI process.
  • the interference measurement part may be a single interference measurement configuration csi-IM-ConfigId or a configuration of the interference measurement list csi-IM- ConfigIdList, which is mainly used in the case of Time Division Duplex (TDD) supporting enhanced Interference Management and Traffic Adaptation (eIMTA).
  • the configuration of the CSI process may also include some other configuration information such as pilot power Pc information, codebook restriction (codebook Subset Restriction) bitmap indication information, and 4Tx codebook version selection indication information.
  • the UE may need to select the precoding pilot first, or the resource set selection of the precoding pilot, or the port group selection, and then based on the selected
  • the CSI-RS pilot performs quantitative feedback of channel information.
  • the terminal needs to select and feed back CSI-RS resource index (CRI) to select information. And calculating corresponding RI/PMI/CQI information based on the CSI-RS measurement resource subset corresponding to the selected CRI.
  • CRI CSI-RS resource index
  • each set of CSI-RS resources corresponds to one CRI, and has independent Nk CSI-RS port configurations, CSI-RS pattern configuration, pilot sequence configuration, and the like.
  • the transmitting end ie, the transmitting device
  • the receiving end ie, the receiving device
  • some concepts, scenarios, and configuration methods are introduced.
  • the number of antennas/ports/array elements configured per transmitting end is N, where N is a positive integer greater than or equal to one.
  • the transmitting end transmits data or an enhanced physical downlink control channel (ePDCCH) pilot signal to a user served by the NB PRBs.
  • ePDCCH enhanced physical downlink control channel
  • Each PRB pair includes Nc subcarriers and Ns orthogonal frequency division multiplexing (OFDM)/orthogonal frequency division A set S of Resource Elements (referred to as RE, also referred to as resource granularity or resource particles) of Orthogonal Frequency Division Multiple Access (OFDMA) symbols, which includes Nc*Ns REs.
  • All PRs of the PRB transmission data or ePDCCH are divided into K data REGs, here labeled DATA REG where K is a positive integer greater than 1, and each DATA REG group contains several REs in the same PRB pair, and The REs in different DATA REG groups are not duplicated.
  • K DATA REGs use separate precoding for layer to antenna port mapping.
  • the precoded DMRS ports in the same PRB are also divided into K DMRS REG groups, each group pre The coded DMRS port group is mapped to the antenna port by using independent K precoding, and then sent to the receiving end.
  • the receiving end receives M precoded DMRSs, and divides M ports into K DMRS REGs for channel estimation.
  • the DMRS REG performs channel estimation separately and performs data detection and demodulation on the data on the DATA REG associated therewith.
  • a DMRS REG is associated with a DATA REG group
  • the k-th DMRS REG is associated with the k-th DATA REG without loss of generality.
  • the association is that the user performs channel estimation with the k-th DMRS REG and estimates The channel obtains the channel estimate of the kth DATA REG region, and performs data detection, demodulation, decoding, etc. on the kth DATA REG.
  • DMRS only precoded DMRS is used as a demodulation reference signal in the same PRB pair.
  • the number of layers of data to be transmitted is R, and K different DATA REGs are allocated to the transmission data or ePDCCH region in the same PRB pair, and each DATA REG needs a DMRS REG associated with it, then a total of K is required. *R DMRS ports.
  • K is large or R is large, the number of DMRS ports required will be relatively large, that is, DMRS will occupy a large number of REs, resulting in a decrease in resource utilization.
  • the present invention provides a method and an apparatus for transmitting a DMRS, so as to solve at least the problem that the RE occupancy is large and the resource utilization rate is low in the related art.
  • a method for transmitting a demodulation reference signal DMRS including: selecting a DMRS type from at least two different DMRS types; and transmitting the selected DMRS indicated by the DMRS type.
  • the DMRS indicated by the DMRS type includes a first type of DMRS and a second type of DMRS, where the first type of DMRS includes a precoded DMRS or a beamformed Beamformed DMRS; and/or the The second type of DMRS includes a non-precoded DMRS.
  • sending the selected DMRS indicated by the DMRS type includes: directly transmitting the transport layer to the mapping process from the transport layer to the DMRS port One is mapped to the DMRS port.
  • sending the selected DMRS indicated by the DMRS type includes: mapping the first type of DMRS from the DMRS port to the antenna In the process of the port, the DMRS is processed by using a precoding Wp, wherein the Wp is a non-unit matrix.
  • the method includes at least one of the following: the Wp is the same as the precoding Wd used by the data resource granularity group DATA REG associated with the first type of DMRS; the number of the first type of DMRS ports It is equal to the number of layers of the transport layer.
  • sending the selected DMRS indicated by the DMRS type includes: in the mapping process from the transport layer to the DMRS port, the transport layer After multiplying by the precoding Wd, it is mapped to the DMRS port.
  • sending the selected DMRS indicated by the DMRS type includes: mapping the second type of DMRS from the DMRS port to the antenna port In the process of performing one-to-one mapping processing on the DMRS port, or in processing from the DMRS port to the antenna port, the DMRS is processed by using a pre-coded WI.
  • the precoding WI is different from the precoding Wd used by the data resource granularity group DATA REG associated with the second type of DMRS; the number of the second type of DMRS ports The number of rows of the Wd is equal; the number of the second type of DMRS ports is equal to the number of the antenna ports; and the WI is an identity matrix.
  • the method further includes: transmitting, by using high layer signaling and/or physical layer signaling, a type of the selected DMRS.
  • selecting a DMRS type from at least two different DMRS types according to at least one of the following parameters, a number of DMRS ports of the first type, a channel rank, a number of DMRS ports of the second type, and a data resource granularity group DATA REG A number of choices.
  • the product of the channel rank and the number of DATA REGs is less than or equal to the number of DMRS ports of the second type, selecting a first type of DMRS; and/or, when the channel rank is When the product of the number of DATA REGs is greater than the number of DMRS ports of the second type, the second type of DMRS is selected.
  • a DMRS transmission method including: transmitting a demodulation reference signal DMRS, where the number of DMRS ports is N.
  • the number of the DMRS ports is indicated according to the following manner: indicating the number of the DMRS ports according to high layer signaling and/or physical layer signaling.
  • the number of the DMRS ports is indicated according to the following manner: indicating the number of the DMRS ports according to the PQI information and/or the channel state information reporting type CSI report type.
  • the number of the DMRS ports is indicated by at least one of: indicating by a parameter of the number of the DMRS ports included in a table corresponding to the PQI information; and CSI included by the CSI report type
  • the process process indicates that the number of the DMRS ports is the Channel number information of the CSI process measures the number of ports of the pilot CSI-RS resource; when the CSI report type contains CSI
  • the number of the DMRS ports is specific to two or more channel state information measurement pilot CSI-RS resources included in the CSI process.
  • the number of ports of the CSI-RS resource, the specific CSI-RS resource is a CSI-RS resource corresponding to the CSI-RS resource index CRI received in advance; when the number of CSI processes included in the CSI report type is greater than one
  • the number of the DMRS ports is determined according to a specified CSI process among the multiple CSI processes included in the CSI report type.
  • determining the number of the DMRS ports according to the specified CSI process in the multiple CSI processes included in the CSI report type includes at least one of: when the feedback category of the specified CSI process is Class A
  • the number of the DMRS ports is the number of ports of the channel state information measurement pilot CSI-RS resource of the specified CSI process; when the feedback category of the specified CSI process is Class B, the DMRS
  • the number of ports is the number of ports of a specific CSI-RS resource in the pilot CSI-RS resource of the two or more channel state information included in the specified CSI process, where the specific CSI-RS resource is
  • the received CSI-RS resource indexes the CSI-RS resource corresponding to the CRI.
  • a method for transmitting a demodulation reference signal DMRS including: configuring at least two different types of DMRSs in a physical resource block PRB pair; transmitting the At least two different types of DMRS.
  • the at least two different types of DMRSs include a first type of DMRS and a second type of DMRS, where the first type of DMRS comprises a precoded DMRS or a beamformed Beamformed DMRS; and/or, The second type of DMRS includes a non-precoded DMRS.
  • the number of the first type of DMRSs configured in the PRB pair is M
  • the number of the second type of DMRSs is N
  • the K1 data resource granularity groups DATA REG and the first in the PRB pair is M
  • a type of DMRS port is associated
  • K2 DATA REGs within the PRB pair are associated with a second type of DMRS port
  • precoding Wd for the K2 DATA REGs is transmitted.
  • the method further includes: indicating, by using the high layer signaling and/or the physical layer signaling, that the PRB pair is configured with two types of DMRSs at the same time, and sending the values of the M, N, K1, and K2.
  • a method for demodulating reference signal DMRS reception comprising: receiving a DMRS indicated by a selected DMRS type, wherein the selected DMRS type is from at least two different DMRS types Selecting a DMRS type; performing channel estimation using the DMRS according to the type of the DMRS; and performing data demodulation on the data resource granularity group DATA REG associated with the DMRS.
  • the at least two different DMRS types of DMRSs include a first type of DMRS and a second type of DMRS, where the first type of DMRS comprises a precoded DMRS or a beamformed Beamformed DMRS; and Or, the second type of DMRS includes a non-precoded DMRS.
  • performing channel estimation by using the DMRS according to the type of the DMRS and performing data demodulation on the data resource granularity group DATA REG associated with the DMRS includes: when determining that the DMRS is the first type of DMRS, directly Channel estimation using the received DMRS, and correlating the DMRS with channel estimation results Data resource granularity group DATA REG performs data demodulation; and/or, when determining that the DMRS is a second type of DMRS, multiplies the received DMRS by a pre-received precoding Wd, and multiplies by using The obtained result is subjected to channel estimation; data demodulation is performed on the data resource granularity group DATA REG associated with the DMRS by using a channel estimation result.
  • the method further includes: determining the selected DMRS type by using high layer signaling and/or physical layer signaling.
  • determining the selected DMRS type according to at least one of the following parameters: a number of DMRS ports of the first type, a channel rank, a number of DMRS ports of the second type, and a number of data resource granularity groups DATA REG.
  • the product of the channel rank and the number of DATA REGs is less than or equal to the number of DMRS ports of the second type, determining that the selected DMRS type is the first type; and/or, when When the product of the channel rank and the number of DATA REGs is greater than the number of DMRS ports of the second type, it is determined that the selected DMRS type is the second type.
  • a DMRS receiving method including: receiving a demodulation reference signal DMRS, where the number of DMRS ports is N.
  • determining the number of the DMRS ports according to the following manner: determining the number of the DMRS ports by using high layer signaling and/or physical layer signaling.
  • determining the number of the DMRS ports according to the following manner: determining the number of the DMRS ports according to the PQI information and/or the channel state information reporting type CSI report type.
  • determining the number of the DMRS ports according to at least one of the following manners: determining, by using a parameter of the number of the DMRS ports included in a table corresponding to the PQI information, by using the CSI;
  • the CSI process process included in the report type determines the number of the DMRS ports, and includes at least one of the following: when the number of CSI processes included in the CSI report type is 1, and the feedback category of the CSI process is Class A, The number of the DMRS ports is the number of ports of the channel state information measurement pilot CSI-RS resource of the CSI process; when the number of CSI processes included in the CSI report type is 1, and the feedback of the CSI process When the class is Class B, the number of the DMRS ports is the number of ports of the specific CSI-RS resource in the pilot CSI-RS resource of the two or more channel state information measurement indicators included in the CSI process, where the specific The CSI-RS resource is a CSI-RS resource corresponding to the CSI-RS resource index
  • determining the number of the DMRS ports according to the specified CSI process in the multiple CSI processes included in the CSI report type includes at least one of: when the feedback category of the specified CSI process is Class A
  • the number of the DMRS ports is the number of ports of the channel state information measurement pilot CSI-RS resource of the specified CSI process; when the feedback category of the specified CSI process is Class B, the DMRS
  • the number of ports is the number of ports of a specific CSI-RS resource in the pilot CSI-RS resource of the two or more channel state information included in the specified CSI process, where the specific CSI-RS resource is
  • the received CSI-RS resource indexes the CSI-RS resource corresponding to the CRI.
  • a DMRS receiving method including: a physical resource block PRB Receiving at least two different types of DMRSs internally; performing channel estimation using the at least two different types of DMRSs and performing data demodulation on the data resource granularity groups DATA REG of the at least two different types of DMRS associations.
  • the at least two different types of DMRSs include a first type of DMRS and a second type of DMRS, where the first type of DMRS comprises a precoded DMRS or a beamformed Beamformed DMRS; and/or, The second type of DMRS includes a non-precoded DMRS.
  • the method further includes: receiving high layer signaling and/or physical layer signaling; determining, from the high layer signaling and/or physical layer signaling, the following information: a type of the DMRS in the PRB pair, The number M of the first type of DMRS in the PRB pair, the number N of the second type of DMRS, and the number K1 of the data resource granularity group DATA REG associated with the first type of DMRS port in the PRB pair, The number of DATA REGs associated with the second type of DMRS port in the PRB pair is K2, and the precoding Wd is received.
  • a transmitting apparatus for demodulating a reference signal DMRS comprising: a first determining module, configured to select a DMRS type from at least two different DMRS types; a first sending module, setting The DMRS indicated for the selected DMRS type is transmitted.
  • a storage medium comprising a stored program, wherein the program is executed to perform the method of any of the above.
  • a processor for running a program wherein the program is executed to perform the method of any of the above.
  • a DMRS type is selected from at least two different DMRS types; the selected DMRS type indicated DMRS is transmitted. Therefore, the type of DMRS is switched according to the specific situation, and the problem that the RE occupancy is large and the resource utilization rate is low in the related technology is solved, thereby achieving the effect of reducing the RE occupancy and improving the resource utilization.
  • 1 is a flow chart of transmission of a first type of DMRS according to an embodiment of the present invention
  • FIG. 2 is a flow chart of transmission of a second type of DMRS according to an embodiment of the present invention.
  • FIG. 3 is a flow chart of transmission of a third type of DMRS according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a first DMRS receiving method according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of a second DMRS receiving method according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of a third DMRS receiving method according to an embodiment of the present invention.
  • FIG. 7 is a diagram showing a relationship between a data stream, a DMRS port, and an antenna port in a precoded DMRS according to an embodiment of the present invention
  • FIG. 8 is a diagram showing a relationship between a data flow, a DMRS port, and an antenna port mapping in a non-precoded DMRS according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of a frame structure of a DMRS according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of dividing data RE on one PRB into two DATA REGs according to an embodiment of the present invention
  • FIG. 11 is a structural block diagram of a transmitting apparatus of a first type of DMRS according to an embodiment of the present invention.
  • FIG. 12 is a structural block diagram of a second DMRS transmitting apparatus according to an embodiment of the present invention.
  • FIG. 13 is a structural block diagram of a third DMRS transmitting apparatus according to an embodiment of the present invention.
  • FIG. 14 is a structural block diagram of a receiving apparatus of a first DMRS according to an embodiment of the present invention.
  • FIG. 15 is a structural block diagram of a second DMRS receiving apparatus according to an embodiment of the present invention.
  • 16 is a block diagram showing the structure of a receiving apparatus of a third type of DMRS according to an embodiment of the present invention.
  • a transmitting end also referred to as a transmitting device
  • a receiving end which may also be referred to as a receiving device
  • the transmitting end includes, but is not limited to, various wireless communication devices such as a macro base station, a micro base station, and a wireless access point.
  • the receiving end includes but is not limited to: various wireless communication devices such as a data card, a mobile phone, a notebook computer, a personal computer, a tablet computer, a personal digital assistant, and Bluetooth.
  • the transmitting end includes, but is not limited to, various wireless communication devices such as a data card, a mobile phone, a notebook computer, a personal computer, a tablet computer, a personal digital assistant, and Bluetooth.
  • the receiving end includes, but is not limited to, various wireless communication devices such as a macro base station, a micro base station, and a wireless access point.
  • FIG. 1 is a flowchart of sending a first DMRS according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:
  • Step S102 Select a DMRS type from at least two different DMRS types.
  • Step S104 Send the selected DMRS indicated by the DMRS type.
  • the above operation may be performed by the transmitting device.
  • the sending device can select the type of the DMRS according to the specific situation, that is, the type of the DMRS can be switched according to the specific situation, and the problem that the RE occupancy is large and the resource utilization rate is low in the related technology is solved, thereby reducing the RE.
  • the amount of occupancy increases the effect of resource utilization.
  • the DMRS indicated by the DMRS type includes a first type of DMRS and a second type of DMRS, where the first type of DMRS includes a precoded DMRS or a beamformed Beamformed DMRS; and/or The second type of DMRS includes a non-precoded DMRS (ie, Non-precoded DMRS).
  • the DMRS that is sent by the selected DMRS type includes: in the mapping process from the transport layer to the DMRS port, directly The transport layer is mapped to the DMRS port one by one, that is, when the transport layer is mapped to the DMRS port, it is directly mapped, and no correlation coding process is performed.
  • sending the selected DMRS indicated by the DMRS type includes: mapping the first type of DMRS from the DMRS port to the In the process of the antenna port, the DMRS is processed by using a precoding Wp, wherein the Wp is a non-unit array, that is, the signal on the DMRS port is encoded during the mapping process from the DMRS port to the antenna port (the The precoding process can be multiplied by precoding Wp).
  • the DMRS may be encoded, thereby ensuring successful transmission of the DMRS.
  • the foregoing method includes at least one of the following: the Wp is the same as the precoding Wd used by the data resource granularity group DATA REG associated with the first type of DMRS; and the number of the first type of DMRS ports It is equal to the number of layers of the above transport layer.
  • sending the DMRS indicated by the selected DMRS type includes: transmitting the layer during the mapping process from the transport layer to the DMRS port Multiply the precoded Wd and map it to the DMRS port.
  • sending the DMRS indicated by the selected DMRS type includes: mapping the second type of DMRS from the DMRS port to the antenna port.
  • the DMRS is processed using the pre-coded WI.
  • the DMRS can be processed by using the unit array, thereby ensuring that the DMRS is one-to-one mapped when mapped to the antenna port.
  • the value of the precoding Wd used by the data resource granularity group DATA REG associated with the Wd and the DMRS may be consistent.
  • the foregoing method includes at least one of the following: the precoding WI is different from the precoding Wd used by the data resource granularity group DATA REG associated with the second type of DMRS; and the second type of DMRS port is used.
  • the number of lines is equal to the number of lines of Wd; the number of the second type of DMRS ports is equal to the number of antenna ports; the WI is an identity matrix.
  • the method further includes: transmitting, by using higher layer signaling and/or physical layer signaling, the selected one The type of DMRS.
  • the sending device determines the type of the DMRS
  • the determined type may be sent, so that the receiving device may perform channel estimation and data demodulation processing according to the type of the specific DMRS.
  • the DMRS type, the number of DMRS ports of the first type, the channel rank, and the number of DMRS ports of the second type may be selected from at least two different DMRS types according to at least one of the following parameters: Data resource granularity group DATA REG number selection.
  • the first type of DMRS is selected; and/or, when the channel rank and DATA are When the product of the number of REGs is greater than the number of DMRS ports of the second type, the second type of DMRS is selected.
  • the channel rank in this embodiment includes, but is not limited to, the concepts of the number of data transmission layers, the number of data transmission streams, the number of data streams, the number of data layers, the channel Rank, the RI, and the rank.
  • FIG. 2 is a flowchart of a second DMRS sending according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:
  • Step S202 transmitting a demodulation reference signal DMRS, where the number of DMRS ports is N.
  • the above operation may be performed by the transmitting device.
  • the type of the DMRS may be the first type or the second type.
  • the number of DMRS ports may be indicated according to the following manner: the number of DMRS ports is indicated according to high layer signaling and/or physical layer signaling.
  • the number of DMRS ports may be indicated according to the following manner: the number of DMRS ports is indicated according to PQI (PDSCH RE mapping and Quasi co-location Indicator) information or channel state information reporting type CSI report type.
  • PQI PDSCH RE mapping and Quasi co-location Indicator
  • CSI report type channel state information reporting type
  • the number of the DMRS ports is indicated by at least one of the following manners: indicating by a parameter of a number of DMRS ports included in a table corresponding to the PQI information; and a CSI process process included by the CSI report type
  • the indication includes the following: at least one of the following conditions: when the number of CSI processes included in the CSI report type is 1, and the feedback class of the CSI process is Class A, the number of DMRS ports is the channel state information measurement pilot CSI of the CSI process - The number of ports of the RS resource; when the number of CSI processes included in the CSI report type is 1, and the feedback class of the CSI process is Class B, the number of DMRS ports is two or more channel state information measurements included in the CSI process.
  • the number of ports of the specific CSI-RS resource in the pilot CSI-RS resource, the specific CSI-RS resource is the CSI-RS resource corresponding to the CSI-RS resource index CRI received in advance; when the CSI report type includes the CSI
  • the number of processes is greater than 1, the number of DMRS ports is determined according to the specified CSI process in multiple CSI processes included in the CSI report type.
  • the number of the foregoing DMRS ports is determined according to the specified CSI process in the multiple CSI processes included in the CSI report type, including at least one of the following: when the specified CSI process feedback category In the case of Class A, the number of the DMRS ports is the number of ports of the channel state information measurement pilot CSI-RS resource of the specified CSI process; when the feedback type of the specified CSI process is Class B, the number of DMRS ports The number of ports of a specific CSI-RS resource in the pilot CSI-RS resource is measured for two or more channel state information included in the specified CSI process, where the specific CSI-RS resource is a pre-received CSI-RS resource index.
  • FIG. 3 is a flowchart of sending a third DMRS according to an embodiment of the present invention. As shown in FIG. 3, the process includes the following steps:
  • Step S302 configuring at least two different types of DMRSs in one physical resource block PRB pair;
  • Step S304 transmitting the at least two different types of DMRSs on the PRB pair.
  • the above operation may be performed by the transmitting device.
  • the sending device can simultaneously send multiple types of DMRS according to the specific situation, which solves the problem that the RE occupancy is large and the resource utilization rate is low in the related technologies, thereby reducing the RE occupancy and improving the resource utilization. effect.
  • the two different types of DMRSs comprise a first type of DMRS and a second type of DMRS, wherein the first type of DMRS comprises a precoded DMRS or a beamformed Beamformed DMRS; / or, the second type of DMRS includes a non-precoded DMRS (ie, Non-precoded DMRS).
  • the number of the first type of DMRSs configured in the PRB pair is M
  • the number of the second type of DMRSs is N
  • the K1 data resource granularity groups DATA REG in the PRB pair Associated with the first type of DMRS port, the K2 DATA REGs within the above PRB pair are associated with the second type of DMRS port.
  • the foregoing method further includes: performing high-layer signaling, where the high-layer signaling may be high-layer RRC signaling, and the high-layer RRC signaling included in the first display signaling may be the same signaling. , may also be different signaling) and/or physical layer signaling (the physical layer signaling included in the first display signaling may be the same signaling, or may be different signaling), at least the foregoing PRB pair Two types of DMRSs are configured simultaneously, and the values of M, N, K1, and K2 described above are transmitted.
  • FIG. 4 is a flowchart of a first DMRS receiving method according to an embodiment of the present invention. As shown in FIG. 4, the process includes the following steps:
  • Step S402 receiving a DMRS indicated by the selected DMRS type, where the selected DMRS type is a DMRS type selected from at least two different DMRS types;
  • Step S404 performing channel estimation by using the DMRS according to the type of the DMRS and performing data demodulation on the data resource granularity group DATA REG associated with the DMRS.
  • the above operation may be performed by the receiving device.
  • the type of the DMRS received by the receiving device is a type determined by the sending device according to a specific situation, that is, The sending device performs the operation of switching the type of the DMRS according to the specific situation, thereby solving the problem that the RE occupancy is large and the resource utilization rate is low in the related technology, thereby achieving the effect of reducing the RE occupancy and improving the resource utilization.
  • the at least two different DMRS types of DMRSs include a first type of DMRS and a second type of DMRS, wherein the first type of DMRS comprises a precoded DMRS or a beamformed Beamformed DMRS And/or, the second type of DMRS includes a non-precoded DMRS (ie, Non-precoded DMRS).
  • performing channel estimation by using DMRS according to the type of the foregoing DMRS and performing data demodulation on the data resource granularity group DATA REG associated with the DMRS includes: directly determining receiving when the DMRS is the first type of DMRS Receiving the above DMRS for channel estimation, and performing data demodulation on the DMRS-associated data resource granularity group DATA REG by using the channel estimation result; and/or, when determining that the DMRS is the second type of DMRS, the received DMRS and the received DMRS are The pre-coded Wd from the transmitting device is multiplied in advance, and the result obtained by the multiplication is used for channel estimation; and the data resource granularity group DATA REG associated with the DMRS is demodulated by the channel estimation result.
  • the method further includes: determining the selected DMRS type by using high layer signaling and/or physical layer signaling.
  • the selected DMRS type is determined according to at least one of the following parameters: a first type of DMRS port number, a channel rank, a second type of DMRS port number, and a data resource granularity group DATA REG Number selection.
  • the channel rank in this embodiment includes, but is not limited to, the concepts of the number of data transmission layers, the number of data transmission streams, the number of data streams, the number of data layers, the channel Rank, the RI, and the rank.
  • the product of the channel rank and the number of DATA REGs is less than or equal to the number of DMRS ports of the second type, determining that the selected DMRS type is the first type; and/or, when the channel rank When the product of the number of DATA REGs is greater than the number of DMRS ports of the second type, it is determined that the selected DMRS type is the second type.
  • FIG. 5 is a flowchart of a second DMRS receiving method according to an embodiment of the present invention. As shown in FIG. 5, the process includes the following steps:
  • Step S502 receiving a demodulation reference signal DMRS, where the number of DMRS ports is N.
  • the above operation may be performed by the receiving device.
  • the type of the DMRS described above may be the first type or the second type.
  • the number of DMRS ports may be determined according to the following manner: determining the number of the DMRS ports by high layer signaling and/or physical layer signaling.
  • the number of DMRS ports may be determined according to the following manner: determining the number of the DMRS ports according to the PQI information or the channel state information reporting type CSI report type.
  • the number of DMRS ports is determined according to at least one of the following manners: determining the number of the DMRS ports by using parameters of the number of DMRS ports included in the table corresponding to the PQI information; and including by using a CSI report type
  • the CSI process process determines the number of the above DMRS ports, including at least one of the following: when the CSI report The number of CSI processes included in the type is 1, and the number of DMRS ports is the number of ports of the channel state information measurement pilot CSI-RS resource of the CSI process when the feedback class of the CSI process is Class A; when the CSI report type is included When the number of CSI processes is 1, and the feedback class of the CSI process is Class B, the number of DMRS ports is more than two CSI-RSs in the CSI-RS resource of the CSI process.
  • the number of ports of the resource, the specific CSI-RS resource is the CSI-RS resource corresponding to the CSI-RS resource index CRI received in advance; when the number of CSI processes included in the CSI report type is greater than 1, the number of DMRS ports is based on The specified CSI process in multiple CSI processes included in the CSI report type is determined.
  • the number of the foregoing DMRS ports is determined according to the specified CSI process in the multiple CSI processes included in the CSI report type, including at least one of the following: when the feedback category of the specified CSI process is Class A When the number of DMRS ports is the channel state information of the specified CSI process, the number of ports of the pilot CSI-RS resource is measured; when the feedback type of the specified CSI process is Class B, the number of DMRS ports is the specified CSI. The number of ports of the specific CSI-RS resource in the pilot CSI-RS resource is measured by the two or more channel state information included in the process, and the specific CSI-RS resource is the CSI corresponding to the CSI-RS resource index CRI received in advance. -RS resource.
  • the sending device when sending the DMRS, can simultaneously send multiple types of DMRSs.
  • the sending device configures Type 1 DMRS and Type 2 DMRS in one transmission resource block.
  • the DMRS of type 1 and the DMRS of type 2 may be DATA associated with different types of DMRS, respectively.
  • the REG performs channel estimation, detection and demodulation.
  • FIG. 6 is a flowchart of a third DMRS receiving method according to an embodiment of the present invention. As shown in FIG. 6, the process includes the following steps:
  • Step S602 receiving at least two different types of DMRSs in one physical resource block PRB pair;
  • Step S604 performing channel estimation by using the two different types of DMRSs and performing data demodulation on the data resource granularity group DATA REG associated with the at least two different types of DMRSs.
  • the above operation may be performed by the receiving device.
  • the type of the DMRS received by the receiving device may be a type determined by the sending device according to the specific situation, thereby solving the problem that the RE occupancy is large and the resource utilization rate is low in the related technology, thereby reducing the RE occupancy. Improve the effect of resource utilization.
  • the at least two different types of DMRSs include a first type of DMRS and a second type of DMRS, where the first type of DMRS comprises a precoded DMRS or a beamformed Beamformed DMRS; / or, the second type of DMRS includes a non-precoded DMRS (ie, Non-precoded DMRS).
  • the method further includes: receiving high layer signaling and/or physical layer signaling; from the high layer signaling (the high layer signaling may be high layer RRC signaling, and the first display letter described above)
  • the high layer RRC signaling included may be the same signaling, or may be different signaling) and/or physical layer signaling (the physical layer included with the first display signaling described above)
  • the signaling may be the same signaling, or may be different signaling.
  • the following information is determined: the type of the DMRS in the PRB pair, the number M of the first type of DMRS in the PRB pair, and the number of the second type of DMRS. N, the number K1 of data resource granularity groups DATA REG associated with the first type of DMRS port within the PRB pair, and the number K2 of DATA REGs associated with the second type of DMRS port within the PRB pair.
  • precoding DMRS and non-precoding DMRS is introduced by taking the precoding DMRS and/or non precoding DMRS as an example.
  • the codeword stream is first mapped into an R layer data stream after layer mapping processing, and then R DMRSs are respectively inserted into the R layer data stream, and then each layer of data is precoded. Then map to the antenna port.
  • the codeword stream is first mapped to the R layer data stream after layer mapping processing, and then the R layer data stream is precoded, and the data after the precoding process is reinserted.
  • DMRS unlike precoding DMRS, where the DMRS is not precoded
  • precoding DMRS since channel estimation based on precoding DMRS can directly reflect the channel experienced by the transport layer, including precoding information, it can be directly used for coherent demodulation of different layers, that is, the transmitting end does not need to The pre-coded usage information is notified to the receiving end, and the receiving end can also perform data demodulation.
  • the non-precoded DMRS at this time, the receiving end does not know what precoding is used by the transmitting end from the received signal on the DMRS port. Therefore, after using the non-precoded DMRS for channel estimation, the transmitting end is required.
  • the precoding information used by the transmitting end to transmit the DMRS is notified to the receiving end, and then the receiving end can use the channel estimation result and the precoding information to demodulate the data symbols.
  • the type of DMRS can be configured/determined according to explicit signaling.
  • the sender directly configures the type of the DMRS through explicit signaling.
  • the sender divides the REs in each PRB pair into K DATA REGs, G1, G2, ..., GK, and each group includes M1, M2, ..., MK RE, and one RE in the same PRB pair belongs to and belongs to only one DATA REG group, and divides M DMRS ports P1, P2, ..., PM into K DMRS port groups S1, S2, ..., SK.
  • the transmitting end independently uses the precoding Ci to respectively the kth DMRS port group Sk performs precoding, and the sender also precodes the kth DATA REG associated with it using Ci.
  • the transmitting end maps the K precoded DMRS ports and K DATA REGs to the antenna port for transmission.
  • the sender divides the REs in each PRB pair into K DATA REGs, G1, G2, ..., GK, and each group includes M1, M2, ..., MK.
  • One RE, and one RE in the same PRB pair belongs to and belongs to only one DATA REG group, and divides M DMRS ports P1, P2, ..., PM into K DMRS port groups S1, S2, ..., SK.
  • the transmitting end directly maps the signal on the DMRS port to the antenna port, but maps the kth DATA REG to the precoding matrix Wd and then maps Go to the antenna port.
  • the receiving end receives explicit signaling, and the signaling indication content can determine the type of the received DMRS.
  • the receiving end divides the M pre-coded DMRS ports P1, P2, ..., PM into K DMRS port groups S1, S2, ..., SK, and simultaneously divides the REs in the PRB pair into K DATA REG, G1, G2, ..., GK, each group includes M1, M2, ..., MK REs, and one RE in the same PRB pair belongs to and belongs to only one DATA REG group.
  • the receiving end When the receiving end receives the pre-coded DMRS, the receiving end can directly use the signal on the DMRS port for channel estimation, and then use the result of the channel estimation to perform data demodulation on the DATA REG associated with it.
  • the receiving end multiplies the received precoding matrix Ck by the signal on the kth non-precoded DMRS port group, performs channel estimation according to the multiplied signal, and then uses the channel estimation result to associate with the channel estimation result.
  • the kth DATA REG performs data demodulation.
  • the type of the DMRS may be configured/determined according to implicit signaling, that is, the number of layers or channel rank R that may be transmitted according to data, the number of non-precoded DMRS ports N, and the number of divided DMRS port groups K Configuration / OK.
  • K*R>N the sender configuration Non-precoded DMRS.
  • the sender divides the REs in each PRB pair into K DATA REGs, G1, G2, ..., GK, each group including M1, M2, ..., MK REs, and one RE in the same PRB pair belongs to and It belongs to only one DATA REG group, and simultaneously divides M DMRS ports P1, P2, ..., PM into K DMRS port groups S1, S2, ..., SK.
  • the transmitting end directly maps the signal on the DMRS port to the antenna port, but maps the kth DATA REG to the precoding matrix Wd and then maps Go to the antenna port.
  • the number of layers sent by the receiving end according to the data or the channel rank R, the number of non-precoded DMRS ports N, and the number K of DMRS port groups in a PRB pair.
  • the receiving end determines the reception.
  • the DMRS type to be obtained is a non-precoded DMRS.
  • the receiving end divides the M pre-coded DMRS ports P1, P2, ..., PM into K DMRS port groups S1, S2, ..., SK, and simultaneously divides the REs in the PRB pair into K DATA REG, G1, G2, ..., GK, each group includes M1, M2, ..., MK REs, and one RE in the same PRB pair belongs to and belongs to only one DATA REG group.
  • the receiving end performs channel estimation by using the received precoding matrix Ck and the signal on the kth non-precoded DMRS port group, and then performs data demodulation on the kth DATA REG associated with the result of the channel estimation.
  • the frame structure of LTE/LTE A is used to illustrate the effect of the value of various parameters on the DMRS type.
  • M takes the value 2
  • port 7 and port 8 12 orthogonal DMRS REs are shared by orthogonal cover codes (OCC)
  • OCC orthogonal cover codes
  • the number of data layers transmitted is 2
  • the PRB pairs are The REs in the group are also divided into two groups, as shown in Fig. 10, DATA REG1 and DATA REG2, and port 7 is associated with DATA REG1, and port 8 is associated with DATA REG2.
  • the DMRSs on port 7 and port 8 do not need to be precoded to directly map to the antenna port transmission, and DATA REG1 and DATA REG2 respectively use
  • the coding matrices C1 and C2 are precoded and then mapped to antenna port transmissions.
  • the receiving end performs channel estimation using the signal on port 7 and the precoding matrix C1, and performs data demodulation on DATA REG1 using the estimated channel.
  • the receiving end performs channel estimation using the signal on port 8 and the precoding matrix C2, and performs data demodulation on DATA REG2 using the estimated channel.
  • C1 and C2 are N*2 precoding matrices.
  • the type of the DMRS may be configured/determined according to implicit signaling, that is, according to the number of layers of data transmission or the channel rank R, the number of precoded DMRS ports M, and the number of divided DMRS port groups K/ determine.
  • the sender transmits the number of layers of the DMRS antenna port M and the number of DMRS port groups in a PRB pair according to the number of layers or the channel rank R of the data transmission.
  • the configuration of the sender is pre-configured. Encoded DMRS.
  • the sender divides the REs in each PRB pair into K DATA REGs, G1, G2, ..., GK, each group including M1, M2, ..., MK REs, and one RE in the same PRB pair belongs to and It belongs to only one DATA REG group, and simultaneously divides M DMRS ports P1, P2, ..., PM into K DMRS port groups S1, S2, ..., SK.
  • the transmitting end multiplies the k-th DMRS port and the k-th DATA REG associated with it by the same pre-coding matrix Wd, and maps the multiplied signal to the antenna port for transmission.
  • the receiving end determines the number of layers of the DMRS port M and the number K of DMRS port groups in a PRB pair according to the number of layers or the channel rank R of the data transmission.
  • the receiving end determines to receive
  • the DMRS type is precoded DMRS.
  • the receiving end divides the M pre-coded DMRS ports P1, P2, ..., PM into K DMRS port groups S1, S2, ..., SK, and simultaneously divides the REs in the PRB pair into K DATA REG, G1, G2, ..., GK, each group includes M1, M2, ..., MK REs, and one RE in the same PRB pair belongs to and belongs to only one DATA REG group.
  • the receiving end can directly perform channel estimation on the signals on the K DMRS ports, and then perform data demodulation on the k-th DATA REG associated with the result of the channel estimation.
  • the frame structure of LTE/LTE A is used to illustrate the effect of the value of various parameters on the DMRS type.
  • M takes the value 2
  • port 7 and port 8 12 DMRS REs are shared by orthogonal cover codes (OCC)
  • OCC orthogonal cover codes
  • the number of data layers transmitted is 1
  • the REs in the PRB pair are also divided into two groups.
  • DATA REG1 and DATA REG2 and port7 is associated with DATA REG1
  • port 8 is associated with DATA REG2.
  • the multiplied signal is mapped to the antenna port transmission, port 8 and After DATA REG2 is multiplied by the same precoding matrix C2, the multiplied signal is mapped to the antenna port for transmission.
  • the receiving end uses the signal on port 7 for channel estimation, and uses the estimated channel to perform data demodulation on DATA REG1.
  • the receiving end uses the signal on port 8 for channel estimation, and uses the estimated channel to perform data demodulation on DATA REG2.
  • the number of non-precoded DMRS ports is sent/determined by the PQI information in the DCI signaling:
  • the PDSCH RE mapping and Quasi co-location indicator information field can be used to indicate the resource mapping mode of the PDSCH and the QCL parameter configuration.
  • Table 1 shows the LTE-A system. The PQI information table.
  • Table 2 shows the PQI information table of the newly added DMRS indication information, and the DMRS config information is added in the PQI information table, where The DMRS config information contains the type of DMRS and the corresponding number of DMRS ports.
  • DMRS config there may be three types of DMRS config, when the value of DMRS config is 0, it is a non-precoded DMRS; when the value of DMRS config is 1, it is a precoded DMRS; when the value of DMRS config is 2 , for both pre-coded DMRS and non-precoded DMRS on the same RB.
  • the receiving end receives the DCI format 2D signaling, so as to obtain the PQI information, the type of the currently received DMRS and the number of ports N can be determined by looking up the table.
  • the number of non-precoded DMRS ports is sent/determined by the feedback class:
  • the sender sends a non-precoded DMRS, the feedback class is Class A, and the sender configures four CSI processes.
  • the sender indicates the number of configured CSI processes by signaling, and indicates that the number of ports N of the transmitted non-precoded DMRS is bound to the third CSI process.
  • Case 2 The sender sends a non-precoded DMRS, the feedback class is Class B, and the sender configures one CSI process, and the CSI process includes two sets of CSI-RS resources.
  • the sender sends the number of CSI processes by signaling, and indicates that the number N of ports of the non-precoded DMRS is bound to the first set of CSI-RS resources.
  • Case 3 The sender sends a non-precoded DMRS, the feedback class is Class B, and the sender configures two CSI processes, where the first CSI process contains 2 sets of CSI-RS resources, and the second CSI process contains 3 sets. CSI-RS resource.
  • the sender indicates that the number N of ports of the non-precoded DMRS is bound by the CRI to the third set of CSI-RS resources of the second CSI process.
  • Case 1 The receiving end receives the non-precoded DMRS, the receiving end determines that the feedback class is Class A, and the receiving end receives the signaling to determine that there are currently 4 CSI processes and the number of non-precoded DMRS ports N is tied to the third CSI process. set. The receiving end determines the value of N through the number of ports of the CSI-RS resource of Class A in the third CSI process.
  • Case 2 The receiving end receives the non-precoded DMRS, the receiving end determines that the feedback class is Class B, and the receiving end receives the signaling to determine that there is currently one CSI process, and learns from the signaling that the CSI process has two sets of CSI-RS resources.
  • the number N of non-precoded DMRS ports is bound to the first set of CSI-RS resources.
  • the receiving end determines the value of N through the number of ports of the CSI-RS resource in the CSI-RS resource of the first CSI process.
  • Case 3 The receiving end receives the non-precoded DMRS, the receiving end determines that the feedback class is Class B, and the receiving end receives the signaling to determine that there are currently 2 CSI processes.
  • the receiving end determines from the CRI indication that the non-precoded DMRS port number N is bound to the third set of CSI-RS resource on the second CSI process.
  • the receiving end determines the value of N by the number of ports of the third set of CSI-RS resources on the second CSI process.
  • the transmitting end simultaneously configures Beamformed DMRS (ie, the first type of DMRS) and the Non-precoded DMRS (ie, the second type of DMRS) in the same RB, and the receiving end receives the Beamformed DMRS and the Non-precoded
  • the DMRS and its corresponding DATA REG are estimated and demodulated.
  • the sender divides the REs in each PRB pair into K DATA REGs, G1, G2, ..., GK, each group including M1, M2, ..., MK REs, and one RE in the same PRB pair belongs to and It belongs to only one DATA REG group, and simultaneously divides M DMRS ports P1, P2, ..., PM into K DMRS port groups S1, S2, ..., SK.
  • the sender divides the K DMRS port groups into two sets A and B.
  • Set A contains n port groups, namely S1, S2, ..., Sn, and the DMRSs of the n port groups are all Beameded DMRS.
  • Set B contains K-n port groups, respectively Sn+1, Sn+2, ..., SK, and the DMRSs of these K-n port groups are Non-precoded DMRS.
  • the transmitting end sends a signaling to notify the receiving end that the DMRS in the set A is a Beamformed DMRS, and the DMRS in the set B is a Non-precoded DMRS.
  • the sender directly maps Sj to the antenna port transmission, but needs to preply it with Gj.
  • Precoding matrix, R is the number of layers of data transmission.
  • the receiving end divides the REs in each PRB pair into K DATA REGs, G1, G2, ..., GK, each group including M1, M2, ..., MK REs, and one RE in the same PRB pair belongs to and It belongs to only one DATA REG group, and simultaneously divides M DMRS ports P1, P2, ..., PM into K DMRS port groups S1, S2, ..., SK.
  • the receiving end receives signaling, and determines that the DMRS in the port group S1, S2, ..., Sn is a Beamformed DMRS, and the DMRS in the port group Sn+1, Sn+2, ..., SK is a Non-precoded DMRS.
  • the receiving end can independently use the signals on the received DMRS port for channel estimation, and use the estimated channels to perform data detection for the corresponding DATA REG.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.
  • a device for transmitting a demodulation reference signal DMRS is provided, which is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 11 is a structural block diagram of a first DMRS transmitting apparatus according to an embodiment of the present invention. As shown in FIG. 11, the apparatus includes a first determining module 112 and a first transmitting module 114, which are described below:
  • the first determining module 112 is configured to select a DMRS type from at least two different DMRS types.
  • the first sending module 114 is connected to the first determining module 112, and is configured to send the selected DMRS indicated by the DMRS type.
  • the at least two different DMRS types include a first type and a second type, where the first type of DMRS includes a precoded DMRS or a beamformed Beamformed DMRS; and/or The second type of DMRS includes non-precoded DMRS (ie, Non-precoded DMRS).
  • the DMRS indicated by the selected DMRS type is the DMRS of the first type
  • the DMRS indicated by the selected DMRS type is sent: in the mapping process from the transport layer to the DMRS port, the transmission is directly performed.
  • the layer is mapped to the DMRS port one by one, that is, when the transport layer is mapped to the DMRS port, it is a direct mapping, and no related encoding processing is performed.
  • the pre-coded Wp is used to process the DMRS, where the Wp is a non-unit array, that is, the signal on the DMRS port is encoded during the mapping process from the DMRS port to the antenna port (the pre- The encoding process can be multiplied by precoding Wp).
  • the DMRS may be encoded, thereby ensuring successful transmission of the DMRS.
  • the foregoing Wp is the same as the precoding Wd used by the data resource granularity group DATA REG associated with the first type of DMRS; and/or, the format of the first type of DMRS port is the same as that of the foregoing transport layer.
  • the number of layers is equal.
  • the DMRS indicated by the selected DMRS type is the second type of DMRS
  • the DMRS indicated by the selected DMRS type is sent: in the mapping process from the transport layer to the DMRS port, the transport layer is multiplied After precoding Wd, it is mapped to the DMRS port.
  • the DMRS indicated by the selected DMRS type is the second type of DMRS
  • the DMRS indicated by the selected DMRS type is sent: the second type of DMRS is mapped from the DMRS port to the antenna port.
  • the DMRS port is processed one by one, or in the process of mapping from the DMRS port to the antenna port, the DMRS is processed by using the precoding WI.
  • the DMRS can be processed by using the unit array, thereby ensuring that the DMRS is one-to-one mapped when mapped to the antenna port.
  • the value of the precoding Wd used by the data resource granularity group DATA REG associated with the Wd and the DMRS may be consistent.
  • the precoding WI is different from the precoding Wd used by the data resource granularity group DATA REG associated with the second type of DMRS; and/or the number of ports of the second type of DMRS is The number of rows of Wd is equal; and/or the number of DMRS ports of the second type is equal to the number of antenna ports; and/or, the WI is an identity matrix.
  • the foregoing first sending module 114 may further send the type of the DMRS by sending the type of the selected DMRS by using high layer signaling and/or physical layer signaling.
  • the transmitting device determines the type of the DMRS
  • the determined type may be transmitted, so that the receiving device receiving the DMTS can perform channel estimation and data demodulation processing according to the type of the specific DMRS.
  • the DMRS type, the number of DMRS ports of the first type, the channel rank, and the number of DMRS ports of the second type may be selected from at least two different DMRS types according to at least one of the following parameters: Data resource granularity group DATA REG number selection.
  • the first type of DMRS is selected; and/or, when the channel rank and DATA are When the product of the number of REGs is greater than the number of DMRS ports of the second type, the second type of DMRS is selected.
  • the channel rank in this embodiment includes, but is not limited to, the concepts of the number of data transmission layers, the number of data transmission streams, the number of data streams, the number of data layers, the channel Rank, the RI, and the rank.
  • FIG. 12 is a structural block diagram of a second DMRS sending apparatus according to an embodiment of the present invention. As shown in FIG. 12, the apparatus includes a second sending module 122, Explain the device:
  • the second sending module 122 sends a demodulation reference signal DMRS, and the number of the DMRS ports is N.
  • the foregoing second sending module 122 may indicate the number of DMRS ports by indicating the number of DMRS ports according to high layer signaling and/or physical layer signaling.
  • the number of DMRS ports may be indicated according to the following manner: the number of DMRS ports is indicated according to PQI (PDSCH RE mapping and Quasi co-location Indicator) information or channel state information reporting type CSI report type.
  • PQI PDSCH RE mapping and Quasi co-location Indicator
  • CSI report type channel state information reporting type
  • the number of the DMRS ports may be indicated according to at least one of the following manners: indicating by a parameter of the number of DMRS ports included in the table corresponding to the PQI information; and CSI included by the CSI report type
  • the process process is at least one of the following: when the number of CSI processes included in the CSI report type is 1, and the feedback class of the CSI process is Class A, the number of DMRS ports is a channel state information measurement guide of the CSI process.
  • the number of the foregoing DMRS ports is determined according to the specified CSI process in the multiple CSI processes included in the CSI report type, including at least one of the following: when the feedback category of the specified CSI process is Class A
  • the number of the DMRS ports is the number of ports of the channel state information measurement pilot CSI-RS resource of the specified CSI process; when the feedback type of the specified CSI process is Class B, the number of DMRS ports is specified.
  • the number of ports of the specific CSI-RS resource in the pilot CSI-RS resource is measured by the two or more channel state information included in the CSI process, and the specific CSI-RS resource is the CSI-RS resource index CRI corresponding to the pre-received CSI-RS resource.
  • CSI-RS resource when the feedback category of the specified CSI process is Class A
  • the number of the DMRS ports is the number of ports of the channel state information measurement pilot CSI-RS resource of the specified CSI process; when the feedback type of the specified CSI process is Class B,
  • FIG. 13 is a structural block diagram of a third transmitting device for a DMRS according to an embodiment of the present invention. As shown in FIG. 13, the device includes a configuration module. 132 and the third transmitting module 134, the device will be described below.
  • the configuration module 132 is configured to configure at least two different types of DMRSs in one physical resource block PRB pair; the third sending module 134 is connected to the foregoing configuration module 132, and configured to send at least two different types on the PRB pair. DMRS.
  • the at least two different types of DMRSs include a first type of DMRS and a second type of DMRS, where the first type of DMRS comprises a precoded DMRS or a beamformed Beamformed DMRS; / or, the second type of DMRS includes a non-precoded DMRS (ie, Non-precoded DMRS).
  • the number of the first type of DMRSs configured in the PRB pair is M
  • the number of the second type of DMRSs is N
  • the K1 data resource granularity groups DATA REG in the PRB pair Associated with the first type of DMRS port, the K2 DATA REGs within the above PRB pair are associated with the second type of DMRS port.
  • the foregoing third sending module 134 may further perform the following operations: through high layer signaling (the high layer signaling may be high layer RRC signaling, and the high layer RRC letter included in the foregoing first display signaling)
  • the command may be the same signaling, or may be different signaling) and/or physical layer signaling (the physical layer signaling included in the first display signaling may be the same signaling, or may be different)
  • the signaling indicates that two types of DMRSs are simultaneously configured in the PRB pair, and the values of the above M, N, K1, and K2 are obtained.
  • FIG. 14 is a structural block diagram of a first DMRS receiving apparatus according to an embodiment of the present invention. As shown in FIG. 14, the apparatus includes a first receiving module 142, a first processing module 144, which will be described below.
  • the first receiving module 142 is configured to receive the DMRS indicated by the selected DMRS type, where the selected DMRS type is a DMRS type selected from at least two different DMRS types; the first processing module 144 is connected to the first The receiving module 142 is configured to perform channel estimation by using the DMRS according to the type of the DMRS and perform data demodulation on the data resource granularity group DATA REG associated with the DMRS.
  • the at least two different DMRS types of DMRSs include a first type of DMRS and a second type of DMRS, wherein the first type of DMRS comprises a precoded DMRS or a beamformed Beamformed DMRS And/or, the second type of DMRS includes a non-precoded DMRS (ie, Non-precoded DMRS).
  • the first processing module 146 may perform channel estimation by using the DMRS according to the type of the DMRS, and perform data demodulation on the data resource granularity group DATA REG associated with the DMRS: determining the DMRS as the first In a type of DMRS, the received DMRS is directly used for channel estimation, and the channel estimation result is used to perform data demodulation on the DMRS-associated data resource granularity group DATA REG; and/or, in determining that the DMRS is the second type.
  • the received DMRS is multiplied by the pre-coded pre-coded Wd from the transmitting device, and the result obtained by multiplication is used for channel estimation; and the data estimation result data DATA REG associated with the DMRS is used to perform data by using the channel estimation result. demodulation.
  • the apparatus further includes a second determining module configured to determine the selected DMRS type by higher layer signaling and/or physical layer signaling.
  • the foregoing second determining module may further determine the selected DMRS type according to at least one of the following parameters: a first type of DMRS port number, a channel rank, and a second type of DMRS port number, Data resource granularity group DATA REG number selection.
  • the channel rank in this embodiment includes, but is not limited to, the concepts of the number of data transmission layers, the number of data transmission streams, the number of data streams, the number of data layers, the channel Rank, the RI, and the rank.
  • the product of the channel rank and the number of DATA REGs is less than or equal to the number of DMRS ports of the second type, determining that the selected DMRS type is the first type; and/or, when the channel rank When the product of the number of DATA REGs is greater than the number of DMRS ports of the second type, it is determined that the selected DMRS type is the second type.
  • FIG. 15 is a structural block diagram of a second DMRS receiving apparatus according to an embodiment of the present invention. As shown in FIG. 15, the apparatus includes a second receiving module 152, The device will be described.
  • the second receiving module 152 is configured to receive a demodulation reference signal DMRS, where the number of DMRS ports is N.
  • the second receiving module 152 may further determine the number of DMRS ports by determining the number of the DMRS ports by using high layer signaling and/or physical layer signaling.
  • the second receiving module 152 may further determine the number of DMRS ports by determining the number of the DMRS ports according to the PQI information or the channel state information reporting type CSI report type.
  • the second receiving module 152 may determine the number of DMRS ports by using at least one of the following methods: configuring by using parameters of the number of DMRS ports included in the table corresponding to the PQI information;
  • the process of the CSI process included in the report type is configured, including at least one of the following: when the number of CSI processes included in the CSI report type is 1, and the feedback class of the CSI process is Class A, the number of DMRS ports is CSI process.
  • the channel state information is used to measure the number of ports of the pilot CSI-RS resource.
  • the number of CSI processes included in the CSI report type is 1, and the feedback class of the CSI process is Class B, the number of DMRS ports is two of the CSI processes.
  • the number of ports of the specific CSI-RS resource in the pilot CSI-RS resource is measured by the channel state information, and the specific CSI-RS resource is the CSI-RS resource corresponding to the CSI-RS resource index CRI received in advance;
  • the number of CSI processes included in the CSI report type is greater than 1, the number of DMRS ports is determined according to a specified CSI process in multiple CSI processes included in the CSI report type.
  • the number of the foregoing DMRS ports is determined according to the specified CSI process in the multiple CSI processes included in the CSI report type, including at least one of the following: when the feedback category of the specified CSI process is Class A When the number of DMRS ports is the channel state information of the specified CSI process, the number of ports of the pilot CSI-RS resource is measured; when the feedback type of the specified CSI process is Class B, the number of DMRS ports is the specified CSI. The number of ports of the specific CSI-RS resource in the pilot CSI-RS resource is measured by the two or more channel state information included in the process, and the specific CSI-RS resource is the CSI corresponding to the CSI-RS resource index CRI received in advance. -RS resource.
  • FIG. 16 is a flowchart of a third DMRS receiving apparatus according to an embodiment of the present invention. As shown in FIG. 16, the flow includes a third receiving module 162 and a second processing. Module 164, the device will be described below.
  • the third receiving module 162 is configured to receive at least two different types of DMRSs in one physical resource block PRB pair; the second processing module 164 is connected to the third receiving module 162, and configured to utilize the at least two different types of the foregoing
  • the DMRS performs channel estimation and performs data demodulation on the data resource granularity group DATA REG associated with the at least two different types of DMRSs.
  • the at least two different types of DMRSs include a first type of DMRS and a second type of DMRS, where the first type of DMRS comprises a precoded DMRS or a beamformed Beamformed DMRS; / or, the second type of DMRS includes non-precoded Non-precoded DMRS.
  • the foregoing apparatus further includes a fourth receiving module configured to receive high layer signaling and/or physical layer signaling; and the high layer signaling may be high layer RRC signaling, and The high-level RRC signaling included in the foregoing first display signaling may be the same signaling, or may be different signaling) and/or physical layer signaling (with physical layer signaling included in the first display signaling described above).
  • the following information may be determined in the same signaling or in different signaling: the type of DMRS in the PRB pair, the number M of the first type of DMRS in the PRB pair, and the number N of the second type of DMRS, The number K1 of data resource granularity groups DATA REG associated with the first type of DMRS port within the PRB pair, and the number K2 of DATA REGs associated with the second type of DMRS port within the PRB pair.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.
  • Embodiments of the present invention also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • S2 Send the selected DMRS indicated by the DMRS type.
  • the storage medium is further arranged to store program code for performing the following steps:
  • S1 Send a demodulation reference signal DMRS, and the number of the DMRS ports is N.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the storage medium is further arranged to store program code for performing the following steps:
  • S1 Receive a DMRS indicated by the selected DMRS type, where the selected DMRS type is a DMRS type selected from at least two different DMRS types;
  • S2 Perform channel estimation by using the DMRS according to the type of the DMRS, and perform data demodulation on the data resource granularity group DATA REG associated with the DMRS.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the storage medium is further arranged to store program code for performing the following steps:
  • the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a Random Access Memory (RAM).
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • the processor performs the above steps according to the stored program code in the storage medium.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device so that they can be stored in the storage device Executed by the computing device, and in some cases, the steps shown or described may be performed in an order different than that herein, or they may be fabricated into individual integrated circuit modules, or multiple of them. Or the steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.
  • the DMRS sending method and apparatus provided by the embodiments of the present invention have the following beneficial effects: the problem that the RE occupancy is large and the resource utilization rate is low in the related art is solved, thereby reducing the RE occupancy. Improve the effect of resource utilization.

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Abstract

本发明提供了一种DMRS的发送方法及装置，其中，该DMRS的发送方法包括：从至少两种不同的DMRS类型中选择DMRS类型；发送选择的上述DMRS类型指示的DMRS。通过本发明，解决了相关技术中存在的RE占用量大，资源利用率低的问题，进而达到了降低RE占用量，提高资源利用率的效果。

Description

DMRS的发送方法及装置 技术领域
本发明涉及通信领域，具体而言，涉及一种DMRS的发送方法及装置。
背景技术
无线通信系统中，发送端和接收端一般会采用多根天线进行发送和接收以获取更高的速率。多输入多输出(multiple-input-multiple-output，简称为MIMO)技术的一个原理是利用信道的一些特征来形成匹配信道特征的多层传输，从而能在不增加带宽和功率的基础上就获得显著的性能提升，这在目前的系统中也得到了广泛应用。比如在长期演进(Long Term Evolution,简称为LTE)和其增强版本高级长期演进(Long Term Evolution-Advanced，简称为LTE A)系统中有多种多天线技术传输的模式，其中，传输模式2为空频分集，传输模式3为开环空间复用或称为开环MIMO技术，传输模式4为闭环空间复用，传输模式5为多用户MIMO，传输模式6为单数据流的闭环空间复用，传输模式7和8分别为单流和双流波束赋形，而传输模式9支持最大8层的空间复用，并能实现当用户和多用户的自适应切换，数据层数的自适应切换，支持开环MIMO和闭环MIMO模式。
在上述的传输模式中，有的需要用户反馈预编码矩阵指示符(Precoding Matrix Indicator，简称为PMI)，这种称为闭环MIMO技术，有的不需要反馈预编码矩阵指示符(Precoding Matrix Indicator，简称为PMI)，这种称为开环MIMO技术。LTE/LTE A中定义这些传输模式，主要是为了适应不同用户的信道特征以及用户的接收能力。比如对于1根接收天线的用户它只能使用复用层数为1的MIMO技术，信道变化比较快的用户，可以考虑使用开环的MIMO技术，这是因为用户移动速度比较快时，信道的改变比较快，在反馈周期内，闭环空间复用反馈的预编码信息并不能准确及时的反应基站下一个反馈周期内下行信道信息，从而会导致性能的下降。而开环空间复用技术由于不需要反馈预编码信息，具有更好的鲁棒性。
LTE/LTE A的早期版本比如Release 8/Release 9采用基于小区公共参考信号(Cell-specific Reference Signal，简称为CRS)的开环MIMO，它是利用TM3(即，传输模式3)来实现的，而且解调主要考虑利用CRS的方法进行解调。由于CRS最大支持4端口，所以TM3不支持大于4端口的情况。
随着基站配置的发送端口越来越多，支持更多端口的开环MIMO技术也需要被支持，在LTE/LTE A的release 10以及以后的版本中，定义了传输模式9和传输模式10，它可以基于解调参考信号(Demodulation Reference Signal，简称为DMRS)做开环MIMO的。在相关的LTE/LTE A协议中DMRS是UE-specific Reference Signal associated with PDSCH，也即UE专用的用于下行传输的参考信号，在发送DMRS之前，需要将DMRS经过预编码W映射到天线端口上去，在通过天线端口发送出去。它一般使用的预编码W和同一个物理资源块(Physical Resource Block，简称为PRB)中数据或者增强下行控制信道(enhance Physical Downlink Control  Channel，简称为ePDCCH)使用的预编码相同，从而终端在用DMRS进行数据/增强的物理下行控制信道(Enhanced Physical Downlink Control Channel，简称为ePDCCH)解调时，不需要基站配置预编码W信息，直接用解调参考信号(De Modulation Reference Signal，简称为DMRS)估计的信道对数据或者ePDCCH解调，这种经过预编码后发送的DMRS称为预编码的DMRS。在LTE/LTE A的release 10～release 13版本里，DMRS最多支持8个端口，分别为port{7,8,9,10,11,12,13,14}。每个port分别占住12个资源单位(Resource Element，简称为RE)。
在基于DMRS的开环MIMO中，由于终端不会反馈预编码信息，所以基站没有先验的信息来确定于下行匹配的预编码来传输数据，从而由于预编码不准确导致性能下降，特别是在基于多个PRB对粒度的开环预编码情况，一旦选择的预编码不合适，容易造成整个数据块的传输失败，一种办法就是将一个PRB对划分成多个资源粒度组(Resource Element Group，简称为REG)，每个REG独立使用一个预编码，从而能有效地遍历不同的码字，从而提高系统的性能。
接下来对码本的相关背景进行说明：LTE的码本随着标准版本的演进，也在不断的演进，在版本Release 8和Release 9中4天线的码本和2天线的码本都是单码字的形式，只有一个PMI其值表示为i＝0,…,N11-1，N11为码字的个数。在Release 10的8天线码本和Release 12的4天线码本时，就是双码本反馈的形式了，即码字可以写成W＝WL*WS的形式，而WL是长期反馈的码本，一般有N11个组，每个组包括了M1个备选波束，用户选择N11个组的一个组索引反馈给基站，这个反馈一般用PMI1来量化和反馈，其值一般用i1＝＝0,…,N11-1表示，N11为所述WL的个数；WS表示一个短期反馈的码本，它的作用是在WL码字里选择M1个备选波束里的一个，并为同一个数据层的每个极化方向选择的波束选择极化相位Co-phasing，WS里的每个码字用PMI2量化和反馈，其值为i2＝0,…,M1-1，M1为WS的个数，其中每种rank下的N11和M1的取值不同，具体的可以参考LTE Release 10协议。
在R12以前的码字都是针对1D天线阵列的，属于1D的码字，在Release 13的码本里设计里，由于使用了更多的天线，码本的维度变得更大了。天线的拓扑一般也是平面阵列的，即有两个维度方向的天线设计了2D的码字。从而码字WL里的每个波束具有形式2维的形式
Figure PCTCN2017078321-appb-000001
其中，vm和un分别为第一维度和第二维度的离散傅里叶矢量(Discrete Fourier Transform，简称为DFT)，m＝1,2,…,N11,n＝1,2,…,N12。
Figure PCTCN2017078321-appb-000002
表示vm和un的kronecker乘积，第一维度端口(端口可以包括天线/port/端口/传输单元/阵子/阵元等可以发送信号的装置)数N1个，第二维度端口数N2个，第一维度端口对应的DFT进行了O1倍的过采样，第二维度的端口对应的DFT进行了O2倍的过采样，所述第一维度或者第二维度天线的离散傅里叶矢量的个数是端口数目的过采样因子的倍数，所以有N11＝N1*O1，N12＝N2*O2，O1为第一维度过采样因子，O2为第二维度过采样因子。WL中第一个维度的码本用PMI11表示，其值为i11＝0,…,N11-1，第二个维度的码本用PMI12表示，其值为i12＝0,…,N12-1。对于上述的每一个PMI11和PMI12的索引，都有M1个WS码字，每个WS码字就是为了从WL里选择2维波束
Figure PCTCN2017078321-appb-000003
以及不同极化方向的Co-phasing，对应的码字索引为PMI2，用i2＝0,…,M1-1 表示。不失一般性，把第一维度端口数N11＝1或第二维度端口数N12＝1的码字称为1D码字，而第一维度端口数N11>1且第二维度端口数N12>1的码字成为2D码字。如果是1D码字且是单码字结构用PMI或者i表示，如果是1D码字且在双码字结构中用PMI1和PMI2共同表示，索引由i1/i2共同表示，如果是2D码字用PMI11，PMI12，PMI2三个码本索引共同表示或者由索引i11，i12，i2共同表示。
第三代合作项目组织(The 3rd Generation Partnership Project，简称为3GPP)还引入了信道状态信息(Channel State Information，简称为CSI)进程process的概念，基站可以为终端配置多个CSI process，每个CSI process相当于一个信道状态信息测量及反馈进程，各个CSI process之间是独立的，可以分别进行参数配置。在传输模式9中，支持1个Process，传输模式10中可以支持最大4个Process。每个CSI process的配置中定义了信道测量部分的配置和干扰测量部分以及反馈模式的配置，干扰测量部分可以是单一干扰测量配置csi-IM-ConfigId也可以是干扰测量列表的配置csi-IM-ConfigIdList，后者主要用于时分双工(Time Division Duplex，简称为TDD)支持增强的干扰管理与业务自适应(enhanced Interference Management and Traffic Adaptation，简称为eIMTA)的情况。CSI process的配置中还可以包含一些其他的配置信息如导频功率Pc信息，码书限制(Codebook Subset Restriction)的bitmap指示信息，4Tx码本版本选择的指示信息。
信道信息的测量和反馈的类别有两种：分别为Class A和Class B。Class A是指基站发送CSI-RS，一般为非预编码导频，UE基于该信道状态信息测量导频CSI-RS直接进行信道测量及CSI量化，得到秩指示(Rank Indicator，简称为RI)/预编码矩阵指示(Precoding Matrix Indicator，简称为PMI)/信道质量指示(Channel Quality Indication，简称为CQI)。将这些内容在物理上行控制信道(Physical Uplink Control Channel，简称为PUCCH)或物理上行共享信道(Physical Uplink Shared Channel，简称为PUSCH)上进行反馈。Class B是指基站发送的CSI-RS，一般为预编码导频，UE可能需要先进行预编码导频的选择，或预编码导频的resource set选择，或端口组选择，然后再基于选择的CSI-RS导频进行信道信息的量化反馈。Class B又分成Class B，Kc>1和Class B，Kc＝1在Class B，Kc>1中，终端需要选择和反馈CSI-RS资源索引(CSI-RS resource index，简称为CRI)选择信息，以及基于选择的CRI对应的CSI-RS测量资源子集计算对应的RI/PMI/CQI信息。这里，有Kc套独立的CSI-RS resource，每套CSI-RS resource对应一个CRI，且有独立的Nk个CSI-RS端口配置，CSI-RS pattern配置，导频序列配置等。在Class B，Kc＝1中，只有一套CSI-RS resource，N1≤8，一般把N1个CSI-RS导频端口分成N1/2组，每组对应一个不同的波束，通过WS-only码本反馈所选的端口，以及端口对应波束的co-phasing信息。当然，Class B，Kc＝1也可以基于传统的码字反馈。
为了便于描述，和减小重复描述，这里将发送端(即，发送设备)，接收端(即，接收设备)以及一些概念，场景和配置方法进行介绍。在一个包括至少一个发送端和至少一个接收端的系统里，每个发送端配置的天线/端口/阵元数目为N，这里N为大于或等于1的正整数。发送端使用Nb个PRB对为其服务的一个用户传输数据或增强下行控制信道(enhance Physical Downlink Control Channel，简称为ePDCCH)导频信号。每个PRB对是包括Nc个子载波和Ns个正交频分复用(Orthogonal Frequency Division Multiplexing，简称为OFDM)/正交频分 多址(Orthogonal Frequency Division Multiple Access，简称为OFDMA)符号的资源单位(Resource Element，简称为RE，也可称为资源粒度或资源粒子)的集合S，它包括Nc*Ns个RE。将每个PRB对传输数据或者ePDCCH的所有RE划分成K个数据REG，这里标记为DATA REG其中K为大于1的正整数，每个DATA REG组包含同一个PRB对里的若干个RE，并且不同的DATA REG组里的RE没有重复的。K个DATA REG使用独立的预编码进行层到天线端口的映射。由于同一个PRB里有K个不同预编码对应的DATA REG，为了给这K个DATA REG进行数据检测，需要将同一个PRB里的预编码的DMRS端口也分成K个DMRS REG组，每组预编码的DMRS端口组使用独立的K个预编码分别映射到天线端口后发送给接收端，接收端接收M个预编码的DMRS，并将M个端口分成K个DMRS REG，分别进行信道估计，每DMRS REG分别进行信道估计，并为与之关联的DATA REG上的数据进行数据检测解调。这里，一个DMRS REG和一个DATA REG组相关联，不失一般性假设第k个DMRS REG和第k个DATA REG进行关联，所述的关联即用户用第k个DMRS REG进行信道估计，并用估计的信道得到第k个DATA REG区域的信道估计，并对第k个DATA REG进行数据检测，解调，解码等。
在相关技术中，在同一个PRB对里只使用预编码的DMRS作为解调参考信号。一方面，如果发送数据的层数为R，对同一个PRB对里的传输数据或ePDCCH区域划分了K个不同的DATA REG，每个DATA REG需要一个DMRS REG与之关联，那么就总共需要K*R个DMRS端口。当K比较大或者R比较大时，所需要的DMRS端口数就会比较大，也即DMRS会占用大量的RE，导致资源利用率下降。
针对相关技术中存在的RE占用量大，资源利用率低的问题，目前尚未提出有效的解决方案。
发明内容
本发明提供了一种DMRS的发送方法及装置，以至少解决相关技术中存在的RE占用量大，资源利用率低的问题。
根据本发明的一个实施例，提供了一种解调参考信号DMRS的发送方法，包括：从至少两种不同的DMRS类型中选择DMRS类型；发送选择的所述DMRS类型指示的DMRS。
可选地，所述DMRS类型指示的DMRS包括第一类型的DMRS和第二类型的DMRS，其中，所述第一类型的DMRS包括预编码的DMRS或波束成型Beamformed DMRS；和/或，所述第二类型的DMRS包括非预编码的DMRS。
可选地，当选择的所述DMRS类型指示的DMRS为第一类型的DMRS时，发送选择的所述DMRS类型指示的DMRS包括：在传输层到DMRS端口的映射过程中，直接将传输层一一映射到所述DMRS端口上。
可选地，在选择的所述DMRS类型指示的DMRS为第一类型的DMRS时，发送选择的所述DMRS类型指示的DMRS包括：在将所述第一类型的DMRS从DMRS端口映射到天线 端口的过程中，使用预编码Wp对所述DMRS进行处理，其中，所述Wp为非单位阵。
可选地，所述方法包括以下至少之一：所述Wp与所述第一类型的DMRS关联的数据资源粒度组DATA REG使用的预编码Wd相同；所述第一类型的DMRS端口的个数与所述传输层的层数相等。
可选地，当选择的所述DMRS类型指示的DMRS为第二类型的DMRS时，发送选择的所述DMRS类型指示的DMRS包括：在传输层到DMRS端口的映射过程中，将所述传输层乘以预编码Wd后，再映射到所述DMRS端口上。
可选地，当选择的所述DMRS类型指示的DMRS为第二类型的DMRS时，发送选择的所述DMRS类型指示的DMRS包括：在将所述第二类型的DMRS从DMRS端口映射到天线端口的过程中，对所述DMRS端口进行一一映射处理，或者从所述DMRS端口映射到天线端口的过程中，使用预编码WI对所述DMRS进行处理。
可选地，包括以下至少之一：所述预编码WI与所述第二类型的DMRS关联的数据资源粒度组DATA REG使用的预编码Wd不相同；所述第二类型的DMRS端口的个数与所述Wd的行数相等；所述第二类型的DMRS端口的个数与所述天线端口的个数相等；所述WI为单位矩阵。
可选地，还包括：通过高层信令和/或物理层信令发送所选择的DMRS的类型。
可选地，根据以下参数至少之一从至少两种不同的DMRS类型中选择DMRS类型，第一类型的DMRS端口个数，信道秩，第二类型的DMRS端口个数，数据资源粒度组DATA REG个数选。
可选地，当所述信道秩与所述DATA REG个数的乘积小于或等于所述第二类型的DMRS端口个数时，选择第一类型的DMRS；和/或，当所述信道秩与所述DATA REG个数的乘积大于所述第二类型的DMRS端口个数时，选择第二类型的DMRS。
根据本发明的另一实施例，提供了一种DMRS发送方法，包括：发送解调参考信号DMRS，所述DMRS端口个数为N。
可选地，根据以下方式指示所述DMRS端口个数：根据高层信令和/或物理层信令指示所述DMRS端口个数。
可选地，根据以下方式指示所述DMRS端口个数：根据PQI信息和/或信道状态信息报告类型CSI report type指示所述DMRS端口个数。
可选地，根据以下方式至少之一指示所述DMRS端口个数：通过所述PQI信息对应的表格中包含的所述DMRS端口的个数的参数进行指示；通过所述CSI report type包含的CSI进程process进行指示，包括以下情况至少之一：当所述CSI report type包含的CSI process个数为1，且所述CSI process的反馈类别为Class A时，所述DMRS端口的个数为所述CSI process的信道状态信息测量导频CSI-RS resource的端口个数；当所述CSI report type包含的CSI  process个数为1，且所述CSI process的反馈类别为Class B时，所述DMRS端口的个数为所述CSI process包含的两个以上的信道状态信息测量导频CSI-RS resource中的特定的CSI-RS resource的端口个数，所述特定的CSI-RS resource为预先接收的CSI-RS resource索引CRI对应的CSI-RS resource；当所述CSI report type包含的CSI process个数大于1时，所述DMRS端口的个数根据所述CSI report type包含的多个CSI process中的指定的CSI process进行确定。
可选地，所述DMRS端口的个数根据所述CSI report type包含的多个CSI process中的指定的CSI process进行确定包括以下至少之一：当所述指定的CSI process的反馈类别为Class A时，所述DMRS端口的个数为所述指定的CSI process的信道状态信息测量导频CSI-RS resource的端口个数；当所述指定的CSI process的反馈类别为Class B时，所述DMRS端口的个数为所述指定的CSI process包含的两个以上的信道状态信息测量导频CSI-RS resource中的特定的CSI-RS resource的端口个数，所述特定的CSI-RS resource为预先接收的CSI-RS resource索引CRI对应的CSI-RS resource。
根据本发明的另一实施例，提供了一种解调参考信号DMRS的发送方法，包括：在一个物理资源块PRB对内配置至少两种不同类型的DMRS；在所述PRB对上发送所述至少两种不同类型的DMRS。
可选地，所述至少两种不同类型的DMRS包括第一类型的DMRS和第二类型的DMRS，其中，所述第一类型的DMRS包括预编码的DMRS或波束成型Beamformed DMRS；和/或，所述第二类型的DMRS包括非预编码的DMRS。
可选地，所述PRB对内配置的第一类型的DMRS的数量为M个，第二类型的DMRS的数量为N个，所述PRB对内的K1个数据资源粒度组DATA REG与第一类型的DMRS端口相关联，所述PRB对内的K2个DATA REG与第二类型的DMRS端口相关联，并且发送用于这K2个DATA REG的预编码Wd。
可选地，所述方法还包括：通过高层信令和/或物理层信令指示所述PRB对内同时配置了两种类型的DMRS，并且发送所述M，N，K1，K2的值。
根据本发明的另一实施例，提供了一种解调参考信号DMRS接收的方法，包括：接收选择的DMRS类型指示的DMRS，其中，所述选择的DMRS类型为从至少两种不同的DMRS类型中选择的DMRS类型；根据所述DMRS的类型利用所述DMRS进行信道估计以及对所述DMRS关联的数据资源粒度组DATA REG进行数据解调。
可选地，所述至少两种不同的DMRS类型的DMRS包括第一类型的DMRS和第二类型的DMRS，其中，所述第一类型的DMRS包括预编码的DMRS或波束成型Beamformed DMRS；和/或，所述第二类型的DMRS包括非预编码的DMRS。
可选地，根据所述DMRS的类型利用所述DMRS进行信道估计以及对所述DMRS关联的数据资源粒度组DATA REG进行数据解调包括：在确定所述DMRS为第一类型的DMRS时，直接利用接收到的所述DMRS进行信道估计，并利用信道估计结果对所述DMRS关联的 数据资源粒度组DATA REG进行数据解调；和/或，在确定所述DMRS为第二类型的DMRS时，将接收到的所述DMRS与预先接收到的预编码Wd相乘，并利用相乘得到的结果进行信道估计；利用信道估计结果对所述DMRS关联的数据资源粒度组DATA REG进行数据解调。
可选地，还包括：通过高层信令和/或物理层信令确定选择的所述DMRS类型。
可选地，根据以下参数至少之一确定选择的所述DMRS类型：第一类型的DMRS端口个数，信道秩，第二类型的DMRS端口个数，数据资源粒度组DATA REG个数选。
可选地，当所述信道秩与所述DATA REG个数的乘积小于或等于所述第二类型的DMRS端口个数时，确定选择的所述DMRS类型为第一类型；和/或，当所述信道秩与所述DATA REG个数的乘积大于所述第二类型的DMRS端口个数时，确定选择的所述DMRS类型为第二类型。
根据本发明的另一实施例，提供了一种DMRS接收方法，包括：接收解调参考信号DMRS，所述DMRS端口个数为N。
可选地，根据以下方式确定所述DMRS端口个数：通过高层信令和/或物理层信令确定所述DMRS端口个数。
可选地，根据以下方式确定所述DMRS端口个数：根据PQI信息和/或信道状态信息报告类型CSI report type确定所述DMRS端口个数。
可选地，根据以下方式至少之一确定所述DMRS端口个数：通过所述PQI信息对应的表格中包含的所述DMRS端口的个数的参数确定所述DMRS端口个数；通过所述CSI report type包含的CSI进程process确定所述DMRS端口个数，包括以下情况至少之一：当所述CSI report type包含的CSI process个数为1，且所述CSI process的反馈类别为Class A时，所述DMRS端口的个数为所述CSI process的信道状态信息测量导频CSI-RS resource的端口个数；当所述CSI report type包含的CSI process个数为1，且所述CSI process的反馈类别为Class B时，所述DMRS端口的个数为所述CSI process包含的两个以上的信道状态信息测量导频CSI-RS resource中的特定的CSI-RS resource的端口个数，所述特定的CSI-RS resource为预先接收的CSI-RS resource索引CRI对应的CSI-RS resource；当所述CSI report type包含的CSI process个数大于1时，所述DMRS端口的个数根据所述CSI report type包含的多个CSI process中的指定的CSI process进行确定。
可选地，所述DMRS端口的个数根据所述CSI report type包含的多个CSI process中的指定的CSI process进行确定包括以下至少之一：当所述指定的CSI process的反馈类别为Class A时，所述DMRS端口的个数为所述指定的CSI process的信道状态信息测量导频CSI-RS resource的端口个数；当所述指定的CSI process的反馈类别为Class B时，所述DMRS端口的个数为所述指定的CSI process包含的两个以上的信道状态信息测量导频CSI-RS resource中的特定的CSI-RS resource的端口个数，所述特定的CSI-RS resource为预先接收的CSI-RS resource索引CRI对应的CSI-RS resource。
根据本发明的另一实施例，提供了一种DMRS接收方法，包括：在一个物理资源块PRB 对内接收至少两种不同类型的DMRS；利用所述至少两种不同类型的DMRS进行信道估计以及对所述至少两种不同类型的DMRS关联的数据资源粒度组DATA REG进行数据解调。
可选地，所述至少两种不同类型的DMRS包括第一类型的DMRS和第二类型的DMRS，其中，所述第一类型的DMRS包括预编码的DMRS或波束成型Beamformed DMRS；和/或，所述第二类型的DMRS包括非预编码的DMRS。
可选地，所述方法还包括：接收高层信令和/或物理层信令；从所述高层信令和/或物理层信令中确定以下信息：所述PRB对内的DMRS的类型、所述PRB对内的第一类型的DMRS的数量M，第二类型的DMRS的数量N，所述PRB对内与第一类型的DMRS端口相关联的数据资源粒度组DATA REG的数量K1，所述PRB对内与第二类型的DMRS端口相关联的DATA REG的数量K2，并接收预编码Wd。
根据本发明的另一实施例，提供了一种解调参考信号DMRS的发送装置，包括：第一确定模块，设置为从至少两种不同的DMRS类型中选择DMRS类型；第一发送模块，设置为发送选择的所述DMRS类型指示的DMRS。
根据本发明的又一个实施例，还提供了一种存储介质，所述存储介质包括存储的程序，其中，所述程序运行时执行上述任一项所述的方法。
根据本发明的又一个实施例，还提供了一种处理器，所述处理器用于运行程序，其中，所述程序运行时执行上述任一项所述的方法。
通过本发明，采用从至少两种不同的DMRS类型中选择DMRS类型；发送选择的所述DMRS类型指示的DMRS。从而实现了根据具体情况切换DMRS的类型，解决了相关技术中存在的RE占用量大，资源利用率低的问题，进而达到了降低RE占用量，提高资源利用率的效果。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据本发明实施例的第一种DMRS的发送的流程图；
图2是根据本发明实施例的第二种DMRS的发送的流程图；
图3是根据本发明实施例的第三种DMRS的发送的流程图；
图4是根据本发明实施例的第一种DMRS接收方法流程图；
图5是根据本发明实施例的第二种DMRS接收方法流程图；
图6是根据本发明实施例的第三种DMRS接收方法流程图；
图7是根据本发明实施例的预编码DMRS中数据流、DMRS端口与天线端口映射关系图；
图8是根据本发明实施例非预编码DMRS中数据流、DMRS端口与天线端口映射关系图；
图9是根据本发明实施例的DMRS的帧结构示意图；
图10是根据本发明实施例的将一个PRB上的数据RE分成2个DATA REG的示意图；
图11是根据本发明实施例的第一种DMRS的发送装置的结构框图；
图12是根据本发明实施例的第二种DMRS的发送装置的结构框图；
图13是根据本发明实施例的第三种DMRS的发送装置的结构框图；
图14是根据本发明实施例的第一种DMRS的接收装置的结构框图；
图15是根据本发明实施例的第二种DMRS的接收装置的结构框图；
图16是根据本发明实施例的第三种DMRS的接收装置的结构框图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
在下述实施例中，会涉及到发送端(也可称为发送设备)和/或接收端(也可称为接收设备)，下面对发送设备和接收设备进行说明：
在下行链路里发送端包括但不限于：宏基站、微基站、无线接入点等各种无线通信设备。接收端包括但不限于：数据卡、手机、笔记本电脑、个人电脑、平板电脑、个人数字助理、蓝牙等各种无线通信设备。
在上行链路里，发送端包括但不限于：数据卡、手机、笔记本电脑、个人电脑、平板电脑、个人数字助理、蓝牙等各种无线通信设备。接收端包括但不限于：宏基站、微基站、无线接入点等各种无线通信设备。
在本实施例中提供了一种DMRS的发送方法，图1是根据本发明实施例的第一种DMRS的发送的流程图，如图1所示，该流程包括如下步骤：
步骤S102，从至少两种不同的DMRS类型中选择DMRS类型；
步骤S104，发送选择的上述DMRS类型指示的DMRS。
其中，执行上述操作的可以是发送设备。
通过上述步骤，发送设备可以根据具体情况选择DMRS的类型，即，可以根据具体情况切换DMRS的类型，解决了相关技术中存在的RE占用量大，资源利用率低的问题，进而达到了降低RE占用量，提高资源利用率的效果。
在一个可选的实施例中，上述DMRS类型指示的DMRS包括第一类型的DMRS和第二类型的DMRS，其中，该第一类型的DMRS包括预编码的DMRS或波束成型Beamformed DMRS；和/或，该第二类型的DMRS包括非预编码的DMRS(即，Non-precoded DMRS)。
在一个可选的实施例中，当选择的DMRS类型指示的DMRS为第一类型的DMRS时，发送选择的所述DMRS类型指示的DMRS包括：在传输层到DMRS端口的映射过程中，直接将传输层一一映射到DMRS端口上，即，在将传输层映射到DMRS端口上时，是直接映射，未做相关编码处理。
在一个可选的实施例中，当选择的DMRS类型指示的DMRS为第一类型的DMRS时，发送选择的所述DMRS类型指示的DMRS包括：在将上述第一类型的DMRS从DMRS端口映射到天线端口的过程中，使用预编码Wp对DMRS进行处理，其中，该Wp为非单位阵，即，在进行DMRS端口到天线端口的映射过程中，对DMRS端口上的信号进行了编码处理(该预编码处理可以是乘以预编码Wp)。在本实施例中，在通过天线端口发送DMRS之前，可以对DMRS进行编码处理，从而保证了DMRS的成功传输。
在一个可选的实施例中，上述方法包括以下至少之一：上述Wp与第一类型的DMRS关联的数据资源粒度组DATA REG使用的预编码Wd相同；上述第一类型的DMRS端口的个数与上述传输层的层数相等。
在一个可选的实施例中，当选择的上述DMRS类型指示的DMRS为第二类型的DMRS时，发送选择的DMRS类型指示的DMRS包括：在传输层到DMRS端口的映射过程中，将传输层乘以预编码Wd后，再映射到DMRS端口上。
在一个可选的实施例中，当选择的上述DMRS类型指示的DMRS为第二类型的DMRS时，发送选择的DMRS类型指示的DMRS包括：在将第二类型的DMRS从DMRS端口映射到天线端口的过程中，对DMRS端口进行一一映射处理，或者从DMRS端口映射到天线端口的过程中，使用预编码WI对DMRS进行处理。在本实施例中，当DMRS的类型为第二类型时，可以利用单位阵对DMRS进行处理，从而保证了DMRS在映射到天线端口上时，是一一映射的。在本实施例中，上述的Wd和DMRS关联的数据资源粒度组DATA REG使用的预编码Wd的取值可以是一致的。
在一个可选的实施例中，上述方法包括以下至少之一：上述预编码WI与第二类型的DMRS关联的数据资源粒度组DATA REG使用的预编码Wd不相同；上述第二类型的DMRS端口的个数与Wd的行数相等；上述第二类型的DMRS端口的个数与天线端口的个数相等；上述WI为单位矩阵。
在一个可选的实施例中，上述方法还包括：通过高层信令和/或物理层信令发送所选择的 DMRS的类型。在本实施例中，当发送设备确定了DMRS的类型后，可以发送确定的类型，从而可以使得接收设备根据具体的DMRS的类型进行信道估计以及数据解调处理。
在一个可选的实施例中，可以根据以下参数至少之一从至少两种不同的DMRS类型中选择DMRS类型，第一类型的DMRS端口个数，信道秩，第二类型的DMRS端口个数，数据资源粒度组DATA REG个数选。
在一个可选的实施例中，当上述信道秩与DATA REG个数的乘积小于或等于第二类型的DMRS端口个数时，选择第一类型的DMRS；和/或，当上述信道秩与DATA REG个数的乘积大于第二类型的DMRS端口个数时，选择第二类型的DMRS。其中，本实施例中的信道秩包括但不限于：数据传输层个数、数据传输流个数、数据流个数、数据层个数、信道Rank、RI、秩等概念。
在本实施例中还提供了一种DMRS发送方法，图2是根据本发明实施例的第二种DMRS发送的流程图，如图2所示，该流程包括如下步骤：
步骤S202，发送解调参考信号DMRS，该DMRS端口个数为N。
其中，执行上述操作的可以是发送设备。
其中，上述的DMRS的类型可以是第一类型，也可以是第二类型。
在一个可选的实施例中，可以根据以下方式指示DMRS端口个数：根据高层信令和/或物理层信令指示DMRS端口个数。
在一个可选的实施例中，可以根据以下方式指示DMRS端口个数：根据PQI(PDSCH RE mapping and Quasi co-location Indicator)信息或信道状态信息报告类型CSI report type指示DMRS端口个数。需要说明的是，上述的类型的信令仅是几种优选的实施例，还可以采用其他类型的信令进行DMRS端口数的配置。下面对如何进行DMRS端口的个数的通知进行说明：
在一个可选的实施例中，根据以下方式至少之一指示上述DMRS端口个数：通过PQI信息对应的表格中包含的DMRS端口的个数的参数进行指示；通过CSI report type包含的CSI进程process进行指示，包括以下情况至少之一：当CSI report type包含的CSI process个数为1，且CSI process的反馈类别为Class A时，DMRS端口的个数为CSI process的信道状态信息测量导频CSI-RS resource的端口个数；当CSI report type包含的CSI process个数为1，且CSI process的反馈类别为Class B时，DMRS端口的个数为CSI process包含的两个以上的信道状态信息测量导频CSI-RS resource中的特定的CSI-RS resource的端口个数，该特定的CSI-RS resource为预先接收的CSI-RS resource索引CRI对应的CSI-RS resource；当CSI report type包含的CSI process个数大于1时，DMRS端口的个数根据上述CSI report type包含的多个CSI process中的指定的CSI process进行确定。
在一个可选的实施例中，上述DMRS端口的个数根据CSI report type包含的多个CSI process中的指定的CSI process进行确定包括以下至少之一：当指定的CSI process的反馈类别 为Class A时，上述DMRS端口的个数为指定的CSI process的信道状态信息测量导频CSI-RS resource的端口个数；当指定的CSI process的反馈类别为Class B时，DMRS端口的个数为指定的CSI process包含的两个以上的信道状态信息测量导频CSI-RS resource中的特定的CSI-RS resource的端口个数，上述特定的CSI-RS resource为预先接收的CSI-RS resource索引CRI对应的CSI-RS resource。
在本实施例中还提供了一种解调参考信号DMRS的发送方法，图3是根据本发明实施例的第三种DMRS的发送的流程图，如图3所示，该流程包括如下步骤：
步骤S302，在一个物理资源块PRB对内配置至少两种不同类型的DMRS；
步骤S304，在上述PRB对上发送上述至少两种不同类型的DMRS。
其中，执行上述操作的可以是发送设备。
通过上述步骤，发送设备可以根据具体情况同时发送多种类型的DMRS，解决了相关技术中存在的RE占用量大，资源利用率低的问题，进而达到了降低RE占用量，提高资源利用率的效果。
在一个可选的实施例中，上述指示两种不同类型的DMRS包括第一类型的DMRS和第二类型的DMRS，其中，该第一类型的DMRS包括预编码的DMRS或波束成型Beamformed DMRS；和/或，该第二类型的DMRS包括非预编码的DMRS(即，Non-precoded DMRS)。
在一个可选的实施例中，上述PRB对内配置的第一类型的DMRS的数量为M个，第二类型的DMRS的数量为N个，上述PRB对内的K1个数据资源粒度组DATA REG与第一类型的DMRS端口相关联，上述PRB对内的K2个DATA REG与第二类型的DMRS端口相关联。
在一个可选的实施例中，上述方法还包括：通过高层信令(该高层信令可以是高层RRC信令，与上述的第一显示信令包括的高层RRC信令可以是相同的信令，也可以是不同的信令)和/或物理层信令(与上述的第一显示信令包括的物理层信令可以是相同的信令，也可以是不同的信令)至少上述PRB对内同时配置了两种类型的DMRS，并且发送上述M，N，K1，K2的值。
在本实施例中还提供了一种DMRS接收的方法，图4是根据本发明实施例的第一种DMRS接收方法流程图，如图4所示，该流程包括如下步骤：
步骤S402，接收选择的DMRS类型指示的DMRS，其中，该选择的DMRS类型为从至少两种不同的DMRS类型中选择的DMRS类型；
步骤S404，根据上述DMRS的类型利用DMRS进行信道估计以及对DMRS关联的数据资源粒度组DATA REG进行数据解调。
其中，执行上述操作的可以是接收设备。
通过上述步骤，接收设备接收的DMRS的类型是发送设备根据具体情况确定的类型，即， 发送设备根据具体情况进行了切换DMRS的类型的操作，从而解决了相关技术中存在的RE占用量大，资源利用率低的问题，进而达到了降低RE占用量，提高资源利用率的效果。
在一个可选的实施例中，上述至少两种不同的DMRS类型的DMRS包括第一类型的DMRS和第二类型的DMRS，其中，该第一类型的DMRS包括预编码的DMRS或波束成型Beamformed DMRS；和/或，该第二类型的DMRS包括非预编码的DMRS(即，Non-precoded DMRS)。
在一个可选的实施例中，根据上述DMRS的类型利用DMRS进行信道估计以及对DMRS关联的数据资源粒度组DATA REG进行数据解调包括：在确定DMRS为第一类型的DMRS时，直接利用接收到的上述DMRS进行信道估计，并利用信道估计结果对DMRS关联的数据资源粒度组DATA REG进行数据解调；和/或，在确定上述DMRS为第二类型的DMRS时，将接收到的DMRS与预先接收到的来自发送设备的预编码Wd相乘，并利用相乘得到的结果进行信道估计；利用信道估计结果对DMRS关联的数据资源粒度组DATA REG进行数据解调。
在一个可选的实施例中，上述方法还包括：通过高层信令和/或物理层信令确定选择的上述DMRS类型。
在一个可选的实施例中，根据以下参数至少之一确定选择的上述DMRS类型：第一类型的DMRS端口个数，信道秩，第二类型的DMRS端口个数，数据资源粒度组DATA REG个数选。其中，本实施例中的信道秩包括但不限于：数据传输层个数、数据传输流个数、数据流个数、数据层个数、信道Rank、RI、秩等概念。
在一个可选的实施例中，当上述信道秩与DATA REG个数的乘积小于或等于第二类型的DMRS端口个数时，确定选择的DMRS类型为第一类型；和/或，当信道秩与DATA REG个数的乘积大于第二类型的DMRS端口个数时，确定选择的DMRS类型为第二类型。
在本实施例中还提供了一种DMRS接收方法，图5是根据本发明实施例的第二种DMRS接收方法流程图，如图5所示，该流程包括如下步骤：
步骤S502，接收解调参考信号DMRS，所述DMRS端口个数为N。
其中，执行上述操作的可以是接收设备。上述的DMRS的类型可以是第一类型，也可以是第二类型。
在一个可选的实施例中，可以根据以下方式确定DMRS端口个数：通过高层信令和/或物理层信令确定所述DMRS端口个数。
在一个可选的实施例中，可以根据以下方式确定DMRS端口个数：根据PQI信息或信道状态信息报告类型CSI report type确定所述DMRS端口个数。
在一个可选的实施例中，根据以下方式至少之一确定DMRS端口个数：通过PQI信息对应的表格中包含的DMRS端口的个数的参数确定上述DMRS端口的个数；通过CSI report type包含的CSI进程process确定上述DMRS端口的个数，包括以下情况至少之一：当CSI report  type包含的CSI process个数为1，且CSI process的反馈类别为Class A时，DMRS端口的个数为CSI process的信道状态信息测量导频CSI-RS resource的端口个数；当CSI report type包含的CSI process个数为1，且CSI process的反馈类别为Class B时，DMRS端口的个数为CSI process包含的两个以上的信道状态信息测量导频CSI-RS resource中的特定的CSI-RS resource的端口个数，该特定的CSI-RS resource为预先接收的CSI-RS resource索引CRI对应的CSI-RS resource；当CSI report type包含的CSI process个数大于1时，DMRS端口的个数根据CSI report type包含的多个CSI process中的指定的CSI process进行确定。
在一个可选的实施例中，上述DMRS端口的个数根据CSI report type包含的多个CSI process中的指定的CSI process进行确定包括以下至少之一：当指定的CSI process的反馈类别为Class A时，DMRS端口的个数为指定的CSI process的信道状态信息测量导频CSI-RS resource的端口个数；当指定的CSI process的反馈类别为Class B时，DMRS端口的个数为指定的CSI process包含的两个以上的信道状态信息测量导频CSI-RS resource中的特定的CSI-RS resource的端口个数，上述特定的CSI-RS resource为预先接收的CSI-RS resource索引CRI对应的CSI-RS resource。
在一个可选的实施例中，发送设备在发送DMRS时，可以同时发送多种类型的DMRS，例如，发送设备在一个传输资源块内配置类型1的DMRS和类型2的DMRS。对于接收设备而言，当接收设备在同一个传输资源块内接收到类型1的DMRS和类型2的DMRS后，可以分别针对类型1的DMRS和类型2的DMRS为与不同类别的DMRS关联的DATA REG进行信道估计，检测和解调。
在本实施例中还提供了一种DMRS接收方法，图6是根据本发明实施例的第三种DMRS接收方法流程图，如图6所示，该流程包括如下步骤：
步骤S602，在一个物理资源块PRB对内接收至少两种不同类型的DMRS；
步骤S604，利用上述指示两种不同类型的DMRS进行信道估计以及对上述至少两种不同类型的DMRS关联的数据资源粒度组DATA REG进行数据解调。
其中，执行上述操作的可以是接收设备。
通过上述步骤，接收设备接收的DMRS的类型可以是发送设备根据具体情况确定的类型，从而解决了相关技术中存在的RE占用量大，资源利用率低的问题，进而达到了降低RE占用量，提高资源利用率的效果。
在一个可选的实施例中，上述至少两种不同类型的DMRS包括第一类型的DMRS和第二类型的DMRS，其中，该第一类型的DMRS包括预编码的DMRS或波束成型Beamformed DMRS；和/或，该第二类型的DMRS包括非预编码的DMRS(即，Non-precoded DMRS)。
在一个可选的实施例中，上述方法还包括：接收高层信令和/或物理层信令；从该高层信令(该高层信令可以是高层RRC信令，与上述的第一显示信令包括的高层RRC信令可以是相同的信令，也可以是不同的信令)和/或物理层信令(与上述的第一显示信令包括的物理层 信令可以是相同的信令，也可以是不同的信令)中确定以下信息：PRB对内的DMRS的类型、PRB对内的第一类型的DMRS的数量M，第二类型的DMRS的数量N，PRB对内与第一类型的DMRS端口相关联的数据资源粒度组DATA REG的数量K1，PRB对内与第二类型的DMRS端口相关联的DATA REG的数量K2。
下面结合具体实施例对本发明进行说明：
为了方便理解实施例中的描述，在此再分别从发射端(即，上述的发送设备)和接收端(即，上述的接收设备)的角度对本发明进行说明，在下述的实施例中，以DMRS的类型为预编码DMRS和/或非预编码DMRS为例来介绍对预编码DMRS和非预编码DMRS的处理流程。
在发送端：
对于预编码的DMRS，如图7所示，码字流首先经过层映射处理后映射成R层数据流，然后将R个DMRS分别插入这R层数据流，之后每一层数据进行预编码处理后再映射到天线端口。对于非预编码的DMRS，如图8所示，码字流首先经过层映射处理后映射成R层数据流，然后对这R层数据流进行预编码处理，对预编码处理之后的数据再插入DMRS(与预编码的DMRS不同，这里的DMRS没有经过预编码的处理)，最后再将这些数据映射到天线端口上。
在接收端：
对于预编码DMRS，由于基于预编码DMRS进行的信道估计可以直接反应传输层所经历的信道，包括预编码信息，因此可以直接用于不同层的相干解调，也就是说，发送端不需要把预编码的使用信息通知给接收端，接收端也能完成数据的解调。而对于非预编码DMRS，此时，接收端从接收到的DMRS端口上的信号并不能知道发送端使用了何种预编码，因此在利用非预编码DMRS进行信道估计后，还需要发送端将发送端发送DMRS时所使用的预编码信息通知给接收端，之后接收端再利用信道估计的结果以及预编码信息才可以对数据符号进行解调。
下面结合具体实施例对上述描述进行说明：
实施例1
在本实施例中，DMRS的类型可根据显式信令配置/确定。
对于发送端来说：
发送端通过显式信令直接对DMRS的类型进行配置。
当配置的DMRS的类型为预编码的DMRS时，发送端将每个PRB对里的RE分成K个DATA REG，G1,G2,…,GK，每个组里包括M1,M2,…,MK个RE，且同一个PRB对里的一个RE属于且仅属于一个DATA REG组，同时将M个DMRS端口P1，P2，…，PM分成K个DMRS端口组S1，S2，…，SK。发送端独立地使用预编码Ci分别对第k个DMRS端口组 Sk进行预编码，并且发送端对与之关联的第k个DATA REG也使用Ci进行预编码。于是，发送端就把K个预编码的DMRS端口和K个DATA REG映射到天线端口从而发射出去。同时，发送端传输给用户Ci为N*R的预编码矩阵，其中i＝1，2，…，K；R为发送数据的层数。
当配置的DMRS的类型为非预编码的DMRS时，发送端将每个PRB对里的RE分成K个DATA REG，G1,G2,…,GK，每个组里包括M1,M2,…,MK个RE，且同一个PRB对里的一个RE属于且仅属于一个DATA REG组，同时将M个DMRS端口P1，P2，…，PM分成K个DMRS端口组S1，S2，…，SK。对于第k个DMRS端口和与之关联的第k个DATA REG，发送端直接将DMRS端口上的信号映射到天线端口上，但是对第k个DATA REG要与预编码矩阵Wd相乘后再映射到天线端口上。
对接收端来说：
接收端接收显式信令，从信令指示内容可以确定接收到的DMRS的类型。接收端将M个预编码DMRS端口P1，P2，…，PM分成K个DMRS端口组S1，S2，…，SK，并同时把PRB对里的RE分成K个DATA REG，G1,G2,…,GK，每个组里包括M1,M2,…,MK个RE，且同一个PRB对里的一个RE属于且仅属于一个DATA REG组。
当接收端接收到预编码的DMRS时，接收端可以直接利用DMRS端口上的信号进行信道估计，然后利用信道估计的结果对与之关联的DATA REG进行数据解调。
当接收端接收到非预编码的DMRS时，接收端还会接收到K个预编码矩阵Ck(对应于上述的Wd)，其中k＝1，2，…，K。接收端将接收到的预编码矩阵Ck与第k个非预编码的DMRS端口组上的信号相乘，再根据相乘后得到的信号进行信道估计，然后利用信道估计的结果对与之关联的第k个DATA REG进行数据解调。
实施例2
在本实施例中，DMRS的类型可根据隐式信令配置/确定，即，可以根据数据发送的层数或者信道秩R、非预编码DMRS端口数N和划分的DMRS端口组的个数K配置/确定。
对于发送端来说：
发送端根据数据发送的层数或者信道秩R，非预编码DMRS天线端口数N，以及一个PRB对里的DMRS端口组的个数K，当满足约束条件K*R>N时，发送端配置非预编码的DMRS。
发送端将每个PRB对里的RE分成K个DATA REG，G1,G2,…,GK，每个组里包括M1,M2,…,MK个RE，且同一个PRB对里的一个RE属于且仅属于一个DATA REG组，同时将M个DMRS端口P1，P2，…，PM分成K个DMRS端口组S1，S2，…，SK。对于第k个DMRS端口和与之关联的第k个DATA REG，发送端直接将DMRS端口上的信号映射到天线端口上，但是对第k个DATA REG要与预编码矩阵Wd相乘后再映射到天线端口上。
对于接收端来说：
接收端根据数据发送的层数或者信道秩R，非预编码DMRS端口数N，以及一个PRB对里的DMRS端口组的个数K，当满足约束条件K*R>N时，接收端确定接收到的DMRS类型为非预编码的DMRS。
接收端将M个预编码DMRS端口P1，P2，…，PM分成K个DMRS端口组S1，S2，…，SK，并同时把PRB对里的RE分成K个DATA REG，G1,G2,…,GK，每个组里包括M1,M2,…,MK个RE，且同一个PRB对里的一个RE属于且仅属于一个DATA REG组。接收端还会接收到K个预编码矩阵Ck，其中k＝1，2，…，K。接收端利用接收到的预编码矩阵Ck与第k个非预编码的DMRS端口组上的信号进行信道估计，然后利用信道估计的结果对与之关联的第k个DATA REG进行数据解调。
下面以LTE/LTE A的帧结构，举例说明各类参数的取值对DMRS类型的影响，比如，在只有12个RE的DMRS帧结构，如图9，M取值为2，port 7和port8通过正交覆盖码(orthogonal cover codes，简称为OCC)的方式共享12个DMRS RE，传输的数据层数为2，DMRS也分成两组即K＝2，天线端口数N＝2，把PRB对里的RE也分成2组，如图10，DATA REG1和DATA REG2，并且使port 7与DATA REG1关联，port 8和DATA REG2关联。根据约束关系K*R＝2*2>N，于是在发送端中，port 7和port 8上的DMRS都不需要经过预编码而直接映射到天线端口发射，而DATA REG1和DATA REG2分别用预编码矩阵C1和C2进行预编码后再映射到天线端口发射。接收端根据约束关系K*R＝2*2>N确定接收到的DMRS是非预编码的DMRS，然后接收端接收2个端口port 7和port 8的DMRS以及2个预编码矩阵C1和C2。接收端用port7上的信号和预编码矩阵C1进行信道估计，并利用估计的信道对DATA REG1做数据解调。接收端用port8上的信号和预编码矩阵C2进行信道估计，并利用估计的信道对DATA REG2做数据解调。其中C1和C2是N*2的预编码矩阵。
实施例3
在本实施例中，DMRS的类型可根据隐式信令配置/确定，即可以根据数据发送的层数或者信道秩R、预编码DMRS端口数M和划分的DMRS端口组的个数K配置/确定。
对于发送端来说：
发送端根据数据发送的层数或者信道秩R，预编码DMRS天线端口数M，以及一个PRB对里的DMRS端口组的个数K，当满足约束条件K*R≤M时，发送端配置预编码的DMRS。
发送端将每个PRB对里的RE分成K个DATA REG，G1,G2,…,GK，每个组里包括M1,M2,…,MK个RE，且同一个PRB对里的一个RE属于且仅属于一个DATA REG组，同时将M个DMRS端口P1，P2，…，PM分成K个DMRS端口组S1，S2，…，SK。发送端对第k个DMRS端口和与之关联的第k个DATA REG都乘以相同的预编码矩阵Wd，再将相乘后得到的信号映射到天线端口发送。
对于接收端来说：
接收端根据数据发送的层数或者信道秩R，预编码DMRS端口数M，以及一个PRB对里的DMRS端口组的个数K，当满足约束条件K*R≤M时，接收端确定接收到的DMRS类型为预编码的DMRS。
接收端将M个预编码DMRS端口P1，P2，…，PM分成K个DMRS端口组S1，S2，…，SK，并同时把PRB对里的RE分成K个DATA REG，G1,G2,…,GK，每个组里包括M1,M2,…,MK个RE，且同一个PRB对里的一个RE属于且仅属于一个DATA REG组。接收端可以直接对K个DMRS端口上的信号分别做信道估计，然后利用信道估计的结果对与之关联的第k个DATA REG进行数据解调。
下面以LTE/LTE A的帧结构，举例说明各类参数的取值对DMRS类型的影响，比如，在只有12个RE的DMRS帧结构，如图9，M取值为2，port 7和port8通过正交覆盖码(orthogonal cover codes，简称为OCC)的方式共享12个DMRS RE，传输的数据层数为1，DMRS分成两组即K＝2，把PRB对里的RE也分成2组，如图10，DATA REG1和DATA REG2，并且使port7与DATA REG1关联，port 8和DATA REG2关联。根据约束关系K*R＝2*1≤M，于是在发送端中，port 7和DATA REG1都乘以相同的预编码矩阵C1后，将相乘得到的信号映射到天线端口发射，port 8和DATA REG2都乘以相同的预编码矩阵C2后，将相乘得到的信号映射到天线端口发送。接收端根据约束关系K*R＝2*1≤M确定接收到的DMRS是预编码的DMRS。接收端用port7上的信号进行信道估计，并利用估计的信道对DATA REG1做数据解调。接收端用port8上的信号进行信道估计，并利用估计的信道对DATA REG2做数据解调。
实施例4
在本实施例中，通过DCI信令中的PQI信息发送/确定非预编码的DMRS端口个数N：
在LTE-A系统中，DCI format 2D中存在PDSCH RE mapping and Quasi co-location Indicator信息字段，即PQI信息，可用于指示PDSCH的资源映射方式以及QCL参数配置，表1所示为LTE-A系统中的PQI信息表。
表1
Figure PCTCN2017078321-appb-000004
Figure PCTCN2017078321-appb-000005
通过新增PQI信息表中的指示信息，可以实现通过PQI信息指示DMRS端口类型的目的，下表2所示为新增DMRS指示信息的PQI信息表，在PQI信息表中增加DMRS config信息，其中DMRS config信息包含DMRS的类型和相应类型的DMRS端口数。更具体的，可以存在3种DMRS config，当DMRS config的值为0时，为非预编码的DMRS；当DMRS config的值为1时，为预编码的DMRS；当DMRS config的值为2时，为同一RB上同时存在预编码的DMRS和非预编码的DMRS。对于接收端来说，接收端接收DCI format 2D信令，从而获取到PQI信息，即可通过查表的方式确定当前接收到的DMRS的类型和端口个数N。
表2
Figure PCTCN2017078321-appb-000006
Figure PCTCN2017078321-appb-000007
实施例5
在本实施例中，通过反馈类别发送/确定非预编码的DMRS端口个数N：
对发送端来说：
情况1、发送端发送非预编码的DMRS，反馈类别是Class A，并且发送端配置了4个CSI process。发送端通过信令指示配置的CSI process的个数，并指示发送的非预编码的DMRS的端口个数N与第3个CSI process绑定。
情况2、发送端发送非预编码的DMRS，反馈类别是Class B，并且发送端配置了1个CSI process，且这个CSI process的且包含2套CSI-RS resource。发送端通过信令指示发送CSI process的个数，并指示非预编码的DMRS的端口个数N与第1套CSI-RS resource绑定。
情况3、发送端发送非预编码的DMRS，反馈类别是Class B，并且发送端配置了2个CSI process，其中第1个CSI process包含2套CSI-RS resource，第2个CSI process包含3套CSI-RS resource。发送端通过CRI指示非预编码的DMRS的端口个数N与第2个CSI process的第3套CSI-RS resource绑定。
对接收端来说：
情况1、接收端接收非预编码的DMRS，接收端确定反馈类别为Class A，并且接收端接收信令确定当前有4个CSI process且非预编码的DMRS端口数N与第3个CSI process绑定。接收端通过第3个CSI process中Class A的CSI-RS resource的端口个数确定N的值。
情况2、接收端接收非预编码的DMRS，接收端确定反馈类别为Class B，并且接收端接收信令确定当前有1个CSI process，并且从信令获知该CSI process有2套CSI-RS resource和非预编码的DMRS端口数N与第1套CSI-RS resource绑定。接收端通过第1个CSI process的套CSI-RS resource中CSI-RS resource的端口个数确定N的值。
情况3、接收端接收非预编码的DMRS，接收端确定反馈类别为Class B，并且接收端接收信令确定当前有2个CSI process。接收端从CRI指示中确定非预编码的DMRS端口数N与第2个CSI process上的第3套CSI-RS resource绑定。接收端通过第2个CSI process上的第3套CSI-RS resource的端口个数确定N的值。
实施例6
在本实施例中，发送端在同一个RB内同时配置Beamformed DMRS(即，第一类型的DMRS)和Non-precoded DMRS(即，第二类型的DMRS)，接收端接收Beamformed DMRS和Non-precoded DMRS以及其对应的DATA REG进行估计与解调。
对于发送端：
发送端将每个PRB对里的RE分成K个DATA REG，G1,G2,…,GK，每个组里包括M1,M2,…,MK个RE，且同一个PRB对里的一个RE属于且仅属于一个DATA REG组，同时将M个DMRS端口P1，P2，…，PM分成K个DMRS端口组S1，S2，…，SK。发送端将这K个DMRS端口组划分为两个集合A和B。集合A包含n个端口组，分别为S1，S2，…，Sn，并且这n个端口组的DMRS都是Beamformed DMRS。集合B包含K-n个端口组，分别为Sn+1，Sn+2，…，SK，并且这K-n个端口组的DMRS都是Non-precoded DMRS。同时发送端发送信令通知接收端集合A中的DMRS是Beamformed DMRS，集合B中的DMRS是Non-precoded DMRS。对集合A中的第j个DMRS端口组Sj和与之关联的DATA REG Gj(j＝1，2，…，n)，发送端将Sj和Gj乘以相同的预编码矩阵Wj(j＝1，2，…，n)(对应于上述的Wd)，将相乘后得到的信号再映射到天线端口发射，其中n个预编码矩阵Wj(j＝1，2，…，n)可以相同也可以不相同。对集合B中的第j个DMRS端口Sj和与之关联的DATA REG Gj(j＝1，2，…，K-n)，发送端将Sj直接映射到天线端口发射，但是对Gj需要将其与预编码矩阵Cj相乘之后再映射到天线端口发射，发送端并且将每个DATA REG所使用的预编码矩阵Cj(j＝1，2，…，K-n)传输给接收端，其中Cj为N*R的预编码矩阵，R为数据传输的层数。
对于接收端：
接收端将每个PRB对里的RE分成K个DATA REG，G1,G2,…,GK，每个组里包括M1,M2,…,MK个RE，且同一个PRB对里的一个RE属于且仅属于一个DATA REG组，同时将M个DMRS端口P1，P2，…，PM分成K个DMRS端口组S1，S2，…，SK。接收端接收信令，确定端口组S1，S2，…，Sn中的DMRS为Beamformed DMRS，而端口组Sn+1，Sn+2，…，SK中的DMRS为Non-precoded DMRS。对于集合A中的n个DMRS端口组，接收端可以直接分别独立的使用接收到的DMRS端口上的信号进行信道估计，并用估计的信道分别为与之对应的DATA REG进行数据检测。对于集合B中的第j个DMRS端口组Sj和与之关联的DATA Gj而言，接收端需要联合利用接收到的与之对应的预编码矩阵信息Cj和接收到的DMRS端口上的信号进行信道估计，再利用信道估计的结果对DATA Gj进行数据解调，其中j＝1，2，…，K-n。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本发明各个实施例所述的方法。
在本实施例中还提供了一种解调参考信号DMRS的发送装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图11是根据本发明实施例的第一种DMRS的发送装置的结构框图，如图11所示，该装置包括第一确定模块112和第一发送模块114，下面对该装置进行说明：
第一确定模块112，设置为从至少两种不同的DMRS类型中选择DMRS类型；第一发送模块114，连接至上述第一确定模块112，设置为发送选择的上述DMRS类型指示的DMRS。
在一个可选的实施例中，上述至少两种不同的DMRS类型包括第一类型和第二类型，其中，该第一类型的DMRS包括预编码的DMRS或波束成型Beamformed DMRS；和/或，该第二类型的DMRS包括非预编码的DMRS(即，Non-precoded DMRS)。
在一个可选的实施例中，当选择的DMRS类型指示的DMRS为第一类型的DMRS时，发送选择的所述DMRS类型指示的DMRS：在传输层到DMRS端口的映射过程中，直接将传输层一一映射到DMRS端口上，即，在将传输层映射到DMRS端口上时，是直接映射，未做相关编码处理。
在一个可选的实施例中，当选择的DMRS类型指示的DMRS为第一类型的DMRS时，发送选择的所述DMRS类型指示的DMRS：在将上述第一类型的DMRS从DMRS端口映射到天线端口的过程中，使用预编码Wp对DMRS进行处理，其中，该Wp为非单位阵，即，在进行DMRS端口到天线端口的映射过程中，对DMRS端口上的信号进行了编码处理(该预编码处理可以是乘以预编码Wp)。在本实施例中，在通过天线端口发送DMRS之前，可以对DMRS进行编码处理，从而保证了DMRS的成功传输。
在一个可选的实施例中，上述Wp与第一类型的DMRS关联的数据资源粒度组DATA REG使用的预编码Wd相同；和/或，上述第一类型的DMRS端口的格式与上述传输层的的层数相等。
在一个可选的实施例中，当选择的上述DMRS类型指示的DMRS为第二类型的DMRS时，发送选择的DMRS类型指示的DMRS：在传输层到DMRS端口的映射过程中，将传输层乘以预编码Wd后，再映射到DMRS端口上。
在一个可选的实施例中，当选择的上述DMRS类型指示的DMRS为第二类型的DMRS时，发送选择的DMRS类型指示的DMRS：在将第二类型的DMRS从DMRS端口映射到天线端口的过程中，对DMRS端口进行一一映射处理，或者从DMRS端口映射到天线端口的过程中，使用预编码WI对DMRS进行处理。在本实施例中，当DMRS的类型为第二类型时，可以利用单位阵对DMRS进行处理，从而保证了DMRS在映射到天线端口上时，是一一映射的。在本实施例中，上述的Wd和DMRS关联的数据资源粒度组DATA REG使用的预编码Wd的取值可以是一致的。
在一个可选的实施例中，上述预编码WI与第二类型的DMRS关联的数据资源粒度组DATA REG使用的预编码Wd不相同；和/或，上述第二类型的DMRS的端口个数与Wd的行数相等；和/或，上述第二类型的DMRS端口的个数与天线端口的个数相等；和/或，上述WI为单位矩阵。
在一个可选的实施例中，上述第一发送模块114还可以通过如下方式发送上述DMRS的类型：通过高层信令和/或物理层信令发送所选择的DMRS的类型。在本实施例中，当发送设备确定了DMRS的类型后，可以发送确定的类型，从而使得接收上述DMTS的接收设备能够根据具体的DMRS的类型进行信道估计以及数据解调处理。
在一个可选的实施例中，可以根据以下参数至少之一从至少两种不同的DMRS类型中选择DMRS类型，第一类型的DMRS端口个数，信道秩，第二类型的DMRS端口个数，数据资源粒度组DATA REG个数选。
在一个可选的实施例中，当上述信道秩与DATA REG个数的乘积小于或等于第二类型的DMRS端口个数时，选择第一类型的DMRS；和/或，当上述信道秩与DATA REG个数的乘积大于第二类型的DMRS端口个数时，选择第二类型的DMRS。其中，本实施例中的信道秩包括但不限于：数据传输层个数、数据传输流个数、数据流个数、数据层个数、信道Rank、RI、秩等概念。
在本实施例中还提供了一种DMRS发送装置，图12是根据本发明实施例的第二种DMRS发送装置的结构框图，如图12所示，该装置包括第二发送模块122，下面对该装置进行说明：
第二发送模块122，发送解调参考信号DMRS，该DMRS端口的个数为N。
在一个可选的实施例中，上述第二发送模块122可以通过如下方式指示DMRS端口的个数：根据高层信令和/或物理层信令指示DMRS端口个数。
在一个可选的实施例中，可以根据以下方式指示DMRS端口个数：根据PQI(PDSCH RE mapping and Quasi co-location Indicator)信息或信道状态信息报告类型CSI report type指示DMRS端口个数。需要说明的是，上述的类型的信令仅是几种优选的实施例，还可以采用其他类型的信令进行DMRS端口数的配置。下面对如何进行DMRS端口的个数的通知进行说明：
在一个可选的实施例中，可以根据以下方式至少之一指示上述DMRS端口个数：通过PQI信息对应的表格中包含的DMRS端口的个数的参数进行指示；通过CSI report type包含的CSI 进程process进行至少，包括以下情况至少之一：当CSI report type包含的CSI process个数为1，且CSI process的反馈类别为Class A时，DMRS端口的个数为CSI process的信道状态信息测量导频CSI-RS resource的端口个数；当CSI report type包含的CSI process个数为1，且CSI process的反馈类别为Class B时，DMRS端口的个数为CSI process包含的两个以上的信道状态信息测量导频CSI-RS resource中的特定的CSI-RS resource的端口个数，该特定的CSI-RS resource为预先接收的CSI-RS resource索引CRI对应的CSI-RS resource；当CSI report type包含的CSI process个数大于1时，DMRS端口的个数根据上述CSI report type包含的多个CSI process中的指定的CSI process进行确定。
在一个可选的实施例中，上述DMRS端口的个数根据CSI report type包含的多个CSI process中的指定的CSI process进行确定包括以下至少之一：当指定的CSI process的反馈类别为Class A时，上述DMRS端口的个数为指定的CSI process的信道状态信息测量导频CSI-RS resource的端口个数；当指定的CSI process的反馈类别为Class B时，DMRS端口的个数为指定的CSI process包含的两个以上的信道状态信息测量导频CSI-RS resource中的特定的CSI-RS resource的端口个数，上述特定的CSI-RS resource为预先接收的CSI-RS resource索引CRI对应的CSI-RS resource。
在本实施例中还提供了一种解调参考信号DMRS的发送装置，图13是根据本发明实施例的第三种DMRS的发送装置的结构框图，如图13所示，该装置包括配置模块132和第三发送模块134，下面对该装置进行说明。
配置模块132，设置为在一个物理资源块PRB对内配置至少两种不同类型的DMRS；第三发送模块134，连接至上述配置模块132，设置为在上述PRB对上发送至少两种不同类型的DMRS。
在一个可选的实施例中，上述至少两种不同类型的DMRS包括第一类型的DMRS和第二类型的DMRS，其中，该第一类型的DMRS包括预编码的DMRS或波束成型Beamformed DMRS；和/或，该第二类型的DMRS包括非预编码的DMRS(即，Non-precoded DMRS)。
在一个可选的实施例中，上述PRB对内配置的第一类型的DMRS的数量为M个，第二类型的DMRS的数量为N个，上述PRB对内的K1个数据资源粒度组DATA REG与第一类型的DMRS端口相关联，上述PRB对内的K2个DATA REG与第二类型的DMRS端口相关联。
在一个可选的实施例中，上述第三发送模块134还可以执行以下操作：通过高层信令(该高层信令可以是高层RRC信令，与上述的第一显示信令包括的高层RRC信令可以是相同的信令，也可以是不同的信令)和/或物理层信令(与上述的第一显示信令包括的物理层信令可以是相同的信令，也可以是不同的信令)指示上述PRB对内同时配置了两种类型的DMRS，并且方式上述M，N，K1，K2的值。
图14是根据本发明实施例的第一种DMRS接收装置的结构框图，如图14所示，该装置包括第一接收模块142第一处理模块144，下面对该装置进行说明。
第一接收模块142，设置为接收选择的DMRS类型指示的DMRS，其中，该选择的DMRS类型为从至少两种不同的DMRS类型中选择的DMRS类型；第一处理模块144，连接至上述第一接收模块142，设置为根据上述DMRS的类型利用DMRS进行信道估计以及对DMRS关联的数据资源粒度组DATA REG进行数据解调。
在一个可选的实施例中，上述至少两种不同的DMRS类型的DMRS包括第一类型的DMRS和第二类型的DMRS，其中，该第一类型的DMRS包括预编码的DMRS或波束成型Beamformed DMRS；和/或，该第二类型的DMRS包括非预编码的DMRS(即，Non-precoded DMRS)。
在一个可选的实施例中，上述第一处理模块146可以通过如下方式根据上述DMRS的类型利用DMRS进行信道估计以及对DMRS关联的数据资源粒度组DATA REG进行数据解调：在确定DMRS为第一类型的DMRS时，直接利用接收到的上述DMRS进行信道估计，并利用信道估计结果对DMRS关联的数据资源粒度组DATA REG进行数据解调；和/或，在确定上述DMRS为第二类型的DMRS时，将接收到的DMRS与预先接收到的来自发送设备的预编码Wd相乘，并利用相乘得到的结果进行信道估计；利用信道估计结果对DMRS关联的数据资源粒度组DATA REG进行数据解调。
在一个可选的实施例中，上述装置还包括第二确定模块，设置为通过高层信令和/或物理层信令确定选择的上述DMRS类型。
在一个可选的实施例中，上述第二确定模块还可以根据以下参数至少之一确定选择的上述DMRS类型：第一类型的DMRS端口个数，信道秩，第二类型的DMRS端口个数，数据资源粒度组DATA REG个数选。其中，本实施例中的信道秩包括但不限于：数据传输层个数、数据传输流个数、数据流个数、数据层个数、信道Rank、RI、秩等概念。
在一个可选的实施例中，当上述信道秩与DATA REG个数的乘积小于或等于第二类型的DMRS端口个数时，确定选择的DMRS类型为第一类型；和/或，当信道秩与DATA REG个数的乘积大于第二类型的DMRS端口个数时，确定选择的DMRS类型为第二类型。
在本实施例中还提供了一种DMRS接收装置，图15是根据本发明实施例的第二种DMRS接收装置的结构框图，如图15所示，该装置包括第二接收模块152，下面对该装置进行说明。
第二接收模块152，设置为接收解调参考信号DMRS，所述DMRS端口个数为N。
在一个可选的实施例中，上述第二接收模块152还可以通过如下方式确定DMRS端口个数：通过高层信令和/或物理层信令确定所述DMRS端口个数。
在一个可选的实施例中，上述第二接收模块152还可以通过如下方式确定DMRS端口个数：根据PQI信息或信道状态信息报告类型CSI report type确定所述DMRS端口个数。
在一个可选的实施例中，上述第二接收模块152可以通过如下方式至少之一确定DMRS端口个数：通过PQI信息对应的表格中包含的DMRS端口的个数的参数进行配置；通过CSI  report type包含的CSI进程process进行配置，包括以下情况至少之一：当CSI report type包含的CSI process个数为1，且CSI process的反馈类别为Class A时，DMRS端口的个数为CSI process的信道状态信息测量导频CSI-RS resource的端口个数；当CSI report type包含的CSI process个数为1，且CSI process的反馈类别为Class B时，DMRS端口的个数为CSI process包含的两个以上的信道状态信息测量导频CSI-RS resource中的特定的CSI-RS resource的端口个数，该特定的CSI-RS resource为预先接收的CSI-RS resource索引CRI对应的CSI-RS resource；当CSI report type包含的CSI process个数大于1时，DMRS端口的个数根据CSI report type包含的多个CSI process中的指定的CSI process进行确定。
在一个可选的实施例中，上述DMRS端口的个数根据CSI report type包含的多个CSI process中的指定的CSI process进行确定包括以下至少之一：当指定的CSI process的反馈类别为Class A时，DMRS端口的个数为指定的CSI process的信道状态信息测量导频CSI-RS resource的端口个数；当指定的CSI process的反馈类别为Class B时，DMRS端口的个数为指定的CSI process包含的两个以上的信道状态信息测量导频CSI-RS resource中的特定的CSI-RS resource的端口个数，上述特定的CSI-RS resource为预先接收的CSI-RS resource索引CRI对应的CSI-RS resource。
在本实施例中还提供了一种DMRS接收方法，图16是根据本发明实施例的第三种DMRS接收装置流程图，如图16所示，该流程包括第三接收模块162和第二处理模块164，下面对该装置进行说明。
第三接收模块162，设置为在一个物理资源块PRB对内接收至少两种不同类型的DMRS；第二处理模块164，连接至上述第三接收模块162，设置为利用上述至少两种不同类型的DMRS进行信道估计以及对上述至少两种不同类型的DMRS关联的数据资源粒度组DATA REG进行数据解调。
在一个可选的实施例中，上述至少两种不同类型的DMRS包括第一类型的DMRS和第二类型的DMRS，其中，该第一类型的DMRS包括预编码的DMRS或波束成型Beamformed DMRS；和/或，该第二类型的DMRS包括非预编码Non-precoded的DMRS。
在一个可选的实施例中，上述装置还包括第四接收模块，设置为接收高层信令和/或物理层信令；从该高层信令(该高层信令可以是高层RRC信令，与上述的第一显示信令包括的高层RRC信令可以是相同的信令，也可以是不同的信令)和/或物理层信令(与上述的第一显示信令包括的物理层信令可以是相同的信令，也可以是不同的信令)中确定以下信息：PRB对内的DMRS的类型、PRB对内的第一类型的DMRS的数量M，第二类型的DMRS的数量N，PRB对内与第一类型的DMRS端口相关联的数据资源粒度组DATA REG的数量K1，PRB对内与第二类型的DMRS端口相关联的DATA REG的数量K2。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述模块分别位于多个处理器中。
本发明的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：
S1，从至少两种不同的DMRS类型中选择DMRS的类型；
S2，发送选择的上述DMRS类型指示的DMRS。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，发送解调参考信号DMRS，该DMRS端口的个数为N。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，在一个物理资源块PRB对内配置至少两种不同类型的DMRS；
S2，在上述PRB对上发送至少两种不同类型的DMRS。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，接收选择的DMRS类型指示的DMRS，其中，该选择的DMRS类型为从至少两种不同的DMRS类型中选择的DMRS类型；
S2，根据上述DMRS的类型利用DMRS进行信道估计以及对DMRS关联的数据资源粒度组DATA REG进行数据解调。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，接收解调参考信号DMRS，所述DMRS端口个数为N。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：
S1，在一个物理资源块PRB对内接收至少两种不同类型的DMRS；
S2，利用上述至少两种不同类型的DMRS进行信道估计以及对上述至少两种不同类型的DMRS关联的数据资源粒度组DATA REG进行数据解调。
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(Read-Only Memory，简称为ROM)、随机存取存储器(Random Access Memory，简称为RAM)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行上述步骤。
可选地，本实施例中的具体示例可以参考上述实施例及可选实施方式中所描述的示例，本实施例在此不再赘述。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置 中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
如上所述，本发明实施例提供的一种DMRS的发送方法及装置具有以下有益效果：解决了相关技术中存在的RE占用量大，资源利用率低的问题，进而达到了降低RE占用量，提高资源利用率的效果。

Claims (37)

  1. 一种解调参考信号DMRS的发送方法，包括：
    从至少两种不同的DMRS类型中选择DMRS类型；
    发送选择的所述DMRS类型指示的DMRS。
  2. 根据权利要求1所述的方法，其中，所述DMRS类型指示的DMRS包括第一类型的DMRS和第二类型的DMRS，其中，所述第一类型的DMRS包括预编码的DMRS或波束成型Beamformed DMRS；和/或，所述第二类型的DMRS包括非预编码的DMRS。
  3. 根据权利要求2所述的方法，其中，当选择的所述DMRS类型指示的DMRS为第一类型的DMRS时，发送选择的所述DMRS类型指示的DMRS包括：
    在传输层到DMRS端口的映射过程中，直接将传输层一一映射到所述DMRS端口上。
  4. 根据权利要求2所述的方法，其中，当选择的所述DMRS类型指示的DMRS为第一类型的DMRS时，发送选择的所述DMRS类型指示的DMRS包括：
    在将所述第一类型的DMRS从DMRS端口映射到天线端口的过程中，使用预编码Wp对所述DMRS进行处理，其中，所述Wp为非单位阵。
  5. 根据权利要求4所述的方法，其中，包括以下至少之一：
    所述Wp与所述第一类型的DMRS关联的数据资源粒度组DATA REG使用的预编码Wd相同；
    所述第一类型的DMRS端口的个数与传输层的层数相等。
  6. 根据权利要求2所述的方法，其中，当选择的所述DMRS类型指示的DMRS为第二类型的DMRS时，发送选择的所述DMRS类型指示的DMRS包括：
    在传输层到DMRS端口的映射过程中，将所述传输层乘以预编码Wd后，再映射到所述DMRS端口上。
  7. 根据权利要求2所述的方法，其中，当选择的所述DMRS类型指示的DMRS为第二类型的DMRS时，发送选择的所述DMRS类型指示的DMRS包括：
    在将所述第二类型的DMRS从DMRS端口映射到天线端口的过程中，对所述DMRS端口进行一一映射处理，或者从所述DMRS端口映射到天线端口的过程中，使用预编码WI对所述DMRS进行处理。
  8. 根据权利要求7所述的方法，其中，包括以下至少之一：
    所述预编码WI与所述第二类型的DMRS关联的数据资源粒度组DATA REG使用的预编码Wd不相同；
    所述第二类型的DMRS端口的个数与所述Wd的行数相等；
    所述第二类型的DMRS端口的个数与所述天线端口的个数相等；
    所述WI为单位矩阵。
  9. 根据权利要求1所述的方法，其中，还包括：
    通过高层信令和/或物理层信令发送所选择的DMRS的类型。
  10. 根据权利要求2所述的方法，其中，根据以下参数至少之一从至少两种不同的DMRS类型中选择DMRS类型，
    第一类型的DMRS端口个数，信道秩，第二类型的DMRS端口个数，数据资源粒度组DATA REG个数。
  11. 根据权利要求10所述的方法，其中，
    当所述信道秩与所述DATA REG个数的乘积小于或等于所述第二类型的DMRS端口个数时，选择第一类型的DMRS；和/或，
    当所述信道秩与所述DATA REG个数的乘积大于所述第二类型的DMRS端口个数时，选择第二类型的DMRS。
  12. 一种DMRS发送方法，包括：
    发送解调参考信号DMRS，所述DMRS端口个数为N。
  13. 根据权利要求12所述的方法，其中，根据以下方式指示所述DMRS端口个数：
    根据高层信令和/或物理层信令指示所述DMRS端口个数。
  14. 根据权利要求12所述的方法，其中，根据以下方式指示所述DMRS端口个数：
    根据PQI信息和/或信道状态信息报告类型CSI report type指示所述DMRS端口个数。
  15. 根据权利要求14所述的方法，其中，根据以下方式至少之一指示所述DMRS端口个数：
    通过所述PQI信息对应的表格中包含的所述DMRS端口的个数的参数进行指示；
    通过所述CSI report type包含的CSI进程process进行指示，包括以下情况至少之一：
    当所述CSI report type包含的CSI process个数为1，且所述CSI process的反馈类别为Class A时，所述DMRS端口的个数为所述CSI process的信道状态信息测量导频CSI-RS resource的端口个数；
    当所述CSI report type包含的CSI process个数为1，且所述CSI process的反馈类别为Class B时，所述DMRS端口的个数为所述CSI process包含的两个以上的信道状态信息测量导频CSI-RS resource中的特定的CSI-RS resource的端口个数，所述特定的CSI-RS resource为预先接收的CSI-RS resource索引CRI对应的CSI-RS resource；
    当所述CSI report type包含的CSI process个数大于1时，所述DMRS端口的个数根据所述CSI report type包含的多个CSI process中的指定的CSI process进行确定。
  16. 根据权利要求15所述的方法，其中，所述DMRS端口的个数根据所述CSI report type包含的多个CSI process中的指定的CSI process进行确定包括以下至少之一：
    当所述指定的CSI process的反馈类别为Class A时，所述DMRS端口的个数为所述指定的CSI process的信道状态信息测量导频CSI-RS resource的端口个数；
    当所述指定的CSI process的反馈类别为Class B时，所述DMRS端口的个数为所述指定的CSI process包含的两个以上的信道状态信息测量导频CSI-RS resource中的特定的CSI-RS resource的端口个数，所述特定的CSI-RS resource为预先接收的CSI-RS resource索引CRI对应的CSI-RS resource。
  17. 一种解调参考信号DMRS的发送方法，包括：
    在一个物理资源块PRB对内配置至少两种不同类型的DMRS；
    在所述PRB对上发送所述至少两种不同类型的DMRS。
  18. 根据权利要求17所述的方法，其中，所述至少两种不同类型的DMRS包括第一类型的DMRS和第二类型的DMRS，其中，所述第一类型的DMRS包括预编码的DMRS或波束成型Beamformed DMRS；和/或，所述第二类型的DMRS包括非预编码的DMRS。
  19. 根据权利要求18所述的方法，其中，所述PRB对内配置的第一类型的DMRS的数量为M个，第二类型的DMRS的数量为N个，所述PRB对内的K1个数据资源粒度组DATA REG与第一类型的DMRS端口相关联，所述PRB对内的K2个DATA REG与第二类型的DMRS端口相关联，并且发送用于这K2个DATA REG的预编码Wd。
  20. 根据权利要求19所述的方法，其中，所述方法还包括：
    通过高层信令和/或物理层信令指示所述PRB对内同时配置了两种类型的DMRS，并且发送所述M，N，K1，K2的值。
  21. 一种解调参考信号DMRS接收的方法，包括：
    接收选择的DMRS类型指示的DMRS，其中，所述选择的DMRS类型为从至少两种不同的DMRS类型中选择的DMRS类型；
    根据所述DMRS的类型利用所述DMRS进行信道估计以及对所述DMRS关联的数据资源粒度组DATA REG进行数据解调。
  22. 根据权利要求21所述的方法，其中，所述至少两种不同的DMRS类型的DMRS包括第一类型的DMRS和第二类型的DMRS，其中，所述第一类型的DMRS包括预编码的DMRS或波束成型Beamformed DMRS；和/或，所述第二类型的DMRS包括非预编码的DMRS。
  23. 根据权利要求22所述的方法，其中，根据所述DMRS的类型利用所述DMRS进行信道 估计以及对所述DMRS关联的数据资源粒度组DATA REG进行数据解调包括：
    在确定所述DMRS为第一类型的DMRS时，直接利用接收到的所述DMRS进行信道估计，并利用信道估计结果对所述DMRS关联的数据资源粒度组DATA REG进行数据解调；和/或，
    在确定所述DMRS为第二类型的DMRS时，将接收到的所述DMRS与预先接收到的预编码Wd相乘，并利用相乘得到的结果进行信道估计；利用信道估计结果对所述DMRS关联的数据资源粒度组DATA REG进行数据解调。
  24. 根据权利要求21所述的方法，其中，还包括：
    通过高层信令和/或物理层信令确定选择的所述DMRS类型。
  25. 根据权利要求22所述的方法，其中，根据以下参数至少之一确定选择的所述DMRS类型：
    第一类型的DMRS端口个数，信道秩，第二类型的DMRS端口个数，数据资源粒度组DATA REG个数选。
  26. 根据权利要求25所述的方法，其中，
    当所述信道秩与所述DATA REG个数的乘积小于或等于所述第二类型的DMRS端口个数时，确定选择的所述DMRS类型为第一类型；和/或，
    当所述信道秩与所述DATA REG个数的乘积大于所述第二类型的DMRS端口个数时，确定选择的所述DMRS类型为第二类型。
  27. 一种DMRS接收方法，包括：
    接收解调参考信号DMRS，所述DMRS端口个数为N。
  28. 根据权利要求27所述的方法，其中，根据以下方式确定所述DMRS端口个数：
    通过高层信令和/或物理层信令确定所述DMRS端口个数。
  29. 根据权利要求27所述的方法，其中，根据以下方式确定所述DMRS端口个数：
    根据PQI信息和/或信道状态信息报告类型CSI report type确定所述DMRS端口个数。
  30. 根据权利要求29所述的方法，其中，根据以下方式至少之一确定所述DMRS端口个数：
    通过所述PQI信息对应的表格中包含的所述DMRS端口的个数的参数确定所述DMRS端口个数；
    通过所述CSI report type包含的CSI进程process确定所述DMRS端口个数，包括以下情况至少之一：
    当所述CSI report type包含的CSI process个数为1，且所述CSI process的反馈类别 为Class A时，所述DMRS端口的个数为所述CSI process的信道状态信息测量导频CSI-RS resource的端口个数；
    当所述CSI report type包含的CSI process个数为1，且所述CSI process的反馈类别为Class B时，所述DMRS端口的个数为所述CSI process包含的两个以上的信道状态信息测量导频CSI-RS resource中的特定的CSI-RS resource的端口个数，所述特定的CSI-RS resource为预先接收的CSI-RS resource索引CRI对应的CSI-RS resource；
    当所述CSI report type包含的CSI process个数大于1时，所述DMRS端口的个数根据所述CSI report type包含的多个CSI process中的指定的CSI process进行确定。
  31. 根据权利要求30所述的方法，其中，所述DMRS端口的个数根据所述CSI report type包含的多个CSI process中的指定的CSI process进行确定包括以下至少之一：
    当所述指定的CSI process的反馈类别为Class A时，所述DMRS端口的个数为所述指定的CSI process的信道状态信息测量导频CSI-RS resource的端口个数；
    当所述指定的CSI process的反馈类别为Class B时，所述DMRS端口的个数为所述指定的CSI process包含的两个以上的信道状态信息测量导频CSI-RS resource中的特定的CSI-RS resource的端口个数，所述特定的CSI-RS resource为预先接收的CSI-RS resource索引CRI对应的CSI-RS resource。
  32. 一种DMRS接收方法，包括：
    在一个物理资源块PRB对内接收至少两种不同类型的DMRS；
    利用所述至少两种不同类型的DMRS进行信道估计以及对所述至少两种不同类型的DMRS关联的数据资源粒度组DATA REG进行数据解调。
  33. 根据权利要求32所述的方法，其中，所述至少两种不同类型的DMRS包括第一类型的DMRS和第二类型的DMRS，其中，所述第一类型的DMRS包括预编码的DMRS或波束成型Beamformed DMRS；和/或，所述第二类型的DMRS包括非预编码的DMRS。
  34. 根据权利要求33所述的方法，其中，所述方法还包括：
    接收高层信令和/或物理层信令；
    从所述高层信令和/或物理层信令中确定以下信息：所述PRB对内的DMRS的类型、所述PRB对内的第一类型的DMRS的数量M，第二类型的DMRS的数量N，所述PRB对内与第一类型的DMRS端口相关联的数据资源粒度组DATA REG的数量K1，所述PRB对内与第二类型的DMRS端口相关联的DATA REG的数量K2，并接收预编码Wd。
  35. 一种解调参考信号DMRS的发送装置，包括：
    第一确定模块，设置为从至少两种不同的DMRS类型中选择DMRS类型；
    第一发送模块，设置为发送选择的所述DMRS类型指示的DMRS。
  36. 一种存储介质，所述存储介质包括存储的程序，其中，所述程序运行时执行权利要求1至34中任一项所述的方法。
  37. 一种处理器，所述处理器用于运行程序，其中，所述程序运行时执行权利要求1至34中任一项所述的方法。
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210359810A1 (en) * 2020-05-13 2021-11-18 Qualcomm Incorporated Code block-based resource mapping for transmissions with data-modulated demodulation reference signals
WO2022027485A1 (en) * 2020-08-06 2022-02-10 Nec Corporation Methods for communication, terminal device, network device and computer-readable media
CN114844617A (zh) * 2018-02-09 2022-08-02 大唐移动通信设备有限公司 一种资源指示、确定方法及装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109155714B (zh) * 2016-05-13 2021-11-23 瑞典爱立信有限公司 多分辨率csi反馈
EP3718277B1 (en) * 2017-12-04 2022-06-22 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Multiple resource set configuration
EP3878225B1 (en) 2018-11-05 2023-09-13 Telefonaktiebolaget LM Ericsson (publ) Method and network element of scheduling uplink reference signal resource
CN111416692B (zh) * 2019-01-07 2023-05-09 中国移动通信有限公司研究院 一种配置方法及设备
CN111614385B (zh) * 2019-06-21 2021-09-10 维沃移动通信有限公司 多输入多输出层数的处理方法及设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102170330A (zh) * 2011-04-29 2011-08-31 中兴通讯股份有限公司 测量参考信号的发送方法及系统
CN102379098A (zh) * 2009-03-31 2012-03-14 高通股份有限公司 用于通信系统中的参考信号的生成和使用的方法和装置
US20130121273A1 (en) * 2011-11-14 2013-05-16 Samsung Electronics Co., Ltd. Method of reference signaling resource allocation for control channel transmission in wireless communication system
CN104185960A (zh) * 2011-11-16 2014-12-03 三星电子株式会社 无线通信系统中发送控制信息的方法和装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102379098A (zh) * 2009-03-31 2012-03-14 高通股份有限公司 用于通信系统中的参考信号的生成和使用的方法和装置
CN102170330A (zh) * 2011-04-29 2011-08-31 中兴通讯股份有限公司 测量参考信号的发送方法及系统
US20130121273A1 (en) * 2011-11-14 2013-05-16 Samsung Electronics Co., Ltd. Method of reference signaling resource allocation for control channel transmission in wireless communication system
CN104185960A (zh) * 2011-11-16 2014-12-03 三星电子株式会社 无线通信系统中发送控制信息的方法和装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114844617A (zh) * 2018-02-09 2022-08-02 大唐移动通信设备有限公司 一种资源指示、确定方法及装置
US20210359810A1 (en) * 2020-05-13 2021-11-18 Qualcomm Incorporated Code block-based resource mapping for transmissions with data-modulated demodulation reference signals
US12328273B2 (en) * 2020-05-13 2025-06-10 Qualcomm Incorporated Code block-based resource mapping for transmissions with data-modulated demodulation reference signals
WO2022027485A1 (en) * 2020-08-06 2022-02-10 Nec Corporation Methods for communication, terminal device, network device and computer-readable media

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