WO2014113971A1 - Demodulation reference signal transmission method, user equipment and base station - Google Patents

Demodulation reference signal transmission method, user equipment and base station Download PDF

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Publication number
WO2014113971A1
WO2014113971A1 PCT/CN2013/070990 CN2013070990W WO2014113971A1 WO 2014113971 A1 WO2014113971 A1 WO 2014113971A1 CN 2013070990 W CN2013070990 W CN 2013070990W WO 2014113971 A1 WO2014113971 A1 WO 2014113971A1
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WO
WIPO (PCT)
Prior art keywords
dmrs
user equipment
pattern
antenna port
base station
Prior art date
Application number
PCT/CN2013/070990
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French (fr)
Chinese (zh)
Inventor
夏亮
闫志宇
马莎
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2013/070990 priority Critical patent/WO2014113971A1/en
Publication of WO2014113971A1 publication Critical patent/WO2014113971A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • H04L5/0094Indication of how sub-channels of the path are allocated
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0014Three-dimensional division
    • H04L5/0023Time-frequency-space
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver

Abstract

Provided are a demodulation reference signal (DMRS) transmission method, a user equipment and a base station. The method comprises: a user equipment receiving a DMRS indication message sent by a base station, the DMRS indication message being used for indicating a DMRS pattern of a DMRS antenna port, the DMRS pattern being a location of a time-frequency resource having a DMRS and/or a location of a resource element (RE) occupied by the DMRS in the time-frequency resource (101); the user equipment determining the DMRS pattern of the DMRS antenna port according to the DMRS indication message (102); and the user equipment acquiring the DMRS according to the DMRS pattern of the DMRS antenna port (103). By means of the present invention, the base station sends a DMRS to the user equipment according to a DMRS pattern with a low DMRS overhead, and the user equipment acquires the DMRS according to the DMRS pattern with a low DMRS overhead, thereby achieving an increase in REs capable of transmitting valid data when the DMRS overhead is low, and improving the utilization rate of the REs and the data transmission rate.

Description

 TECHNICAL FIELD Embodiments of the present invention relate to communication technologies, and in particular, to a demodulation reference signal (Demodulation)

Reference Signal (referred to as DMRS) transmission method, user equipment, and base station. Background technique

 In a wireless communication system, a User Equipment (UE) estimates a downlink channel through a DMRS transmitted by a base station. For example, in the 10th version of the Long Term Evolution (LTE) system, the user equipment demodulates the Physical Downlink Shared Channel (PDSCH) according to the DMRS, or In the LTE version 11 (Release 10, R1 for short) system, the user equipment demodulates the Enhanced Physical Downlink Control Channel (EPDCCH) according to the DMRS.

 In the prior art, the DMRS is carried in a resource element (Resource Element, referred to as RE) of a Resource Block (RB) pair according to a DMRS pattern of a DMRS antenna port specified by the preset LTE protocol, and then sent by the base station. For the user equipment, the user equipment obtains the DMRS according to the preset DMRS pattern of the DMRS antenna port, and the DMRS pattern is the position of the RE occupied by the DMRS in the RB pair. For example, as shown in FIG. 1, R7 represents the RE occupied by the DMRS, and The RE that does not carry the DMRS may be used to carry data that the base station sends to the UE.

 However, in the prior art, the base station with a small coverage sends the DMRS according to the DMRS pattern of the DMRS antenna port specified by the LTE protocol, so that the DMRS occupies a large RE overhead, for example, the overhead can be 7%, which reduces the RE utilization. SUMMARY OF THE INVENTION The present invention provides a demodulation reference signal transmission method, a user equipment, and a base station, which are used to reduce the overhead of the RE occupied by the DMRS and improve the utilization of the RE.

 In a first aspect, an embodiment of the present invention provides a DMRS transmission method, including:

The user equipment receives the DMRS indication message sent by the base station, where the DMRS indication message is used to refer to a DMRS pattern of a DMRS antenna port, where the DMRS pattern is a location of a time-frequency resource in which the DMRS exists and/or a location of a resource element occupied by the DMRS in the time-frequency resource;

 Determining, by the user equipment, a DMRS pattern of the DMRS antenna port according to the DMRS indication message;

 The user equipment acquires the DMRS according to a DMRS pattern of the DMRS antenna port. In a first possible implementation of the first aspect, the user equipment receives a DMRS indication message sent by the base station, where the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, including:

 Receiving, by the user equipment, a DMRS indication message sent by the base station, where the one DMRS indication message is used to indicate a DMRS pattern of the at least one DMRS antenna port; or the user equipment receives the at least two DMRS indications sent by the base station Message, each DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port.

 With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, including:

 The DMRS indication message is used to indicate a density of the DMRS, a spacing of the DMRS, a bitmap encoding of the DMRS, and/or a location of a time-frequency resource in which the DMRS does not exist, where the density of the DMRS, the interval of the DMRS, and the DMRS The bitmap encoding and/or the location of the time-frequency resource in which the DMRS does not exist is used to determine the DMRS pattern of the DMRS antenna port.

 With reference to the first aspect, or the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the DMRS indication message is The cell-specific signaling sent by the base station through a system information block, a main message block, a high layer signaling, a medium access control signaling, a set sequence in a cyclic prefix, or a set scrambling code in a cyclic prefix.

 With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the cell-specific signaling includes a cell type corresponding to the base station; Determining, by the DMRS indication message, a DMRS pattern of the DMRS antenna port, including:

 The user equipment acquires a cell type according to the cell-specific signaling;

The user equipment determines a DMRS pattern of the DMRS antenna port according to the cell type. With reference to the first aspect or the first possible implementation manner of the first aspect or the second possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the DMRS indication message is User equipment specific signaling sent by the base station through high layer signaling or medium access control signaling.

 With reference to the fifth possible implementation manner of the foregoing aspect, in a sixth possible implementation manner of the first aspect, the user equipment specific signaling includes a transmission mode of a physical downlink shared channel (PDSCH); Determining, according to the DMRS indication message, a DMRS pattern of the DMRS antenna port, including:

 The user equipment acquires a transmission mode of the PDSCH according to the user equipment specific signaling;

 The user equipment determines a DMRS pattern of the DMRS antenna port according to a transmission mode of the PDSCH.

 With reference to the third possible implementation manner of the first aspect or the fifth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the DMRS indication message is further used to indicate the following Any one or more kinds of information: a maximum modulation order of the received data, a modulation coding scheme table of the received data, a maximum modulation order of the transmitted data, a modulation coding scheme table of the transmission data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, the sounding reference signal configuration parameter including a period of the sounding reference signal and a subframe offset.

 In conjunction with the fourth possible implementation of the first aspect, in an eighth possible implementation manner of the first aspect, the method further includes:

 The user equipment determines any one or more of the following information according to the cell type: a maximum modulation order of the received data, a modulation and coding scheme table of the received data, a maximum modulation order of the transmitted data, and a modulation coding of the transmitted data. a scheme table, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, where the sounding reference signal configuration parameter includes a period of the sounding reference signal and a subframe offset.

 In conjunction with the sixth possible implementation of the first aspect, in a ninth possible implementation manner of the first aspect, the method further includes:

The user equipment determines any one or more of the following information according to the transmission mode of the PDSCH: a maximum modulation order of the received data, a modulation coding scheme table of the received data, and a data transmission a maximum modulation order, a modulation coding scheme table for transmitting data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, wherein the sounding reference signal configuration parameter includes a sounding reference The period of the signal and the offset of the subframe.

 With reference to the first aspect, or the first possible implementation of the first aspect, or the second possible implementation of the first aspect, in a tenth possible implementation manner of the first aspect, the DMRS indication message is The dynamic signaling sent by the base station by using the physical downlink control channel PDCCH or the enhanced physical downlink control channel EPDCCH, where the dynamic signaling includes any one or more of the following information: N-bit signaling, signaling indicating a redundancy version The signaling indicating the modulation and coding scheme, the signaling indicating the number of antenna ports, the scrambling code sequence and the layer number, and the new data indicating signaling, wherein the N is a natural number; and the user equipment determines according to the DMRS indication message. The DMRS pattern of the DMRS antenna port includes:

 The user equipment determines a DMRS pattern of the DMRS antenna port according to the dynamic signaling.

 With reference to the first aspect, or the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, in the eleventh possible implementation manner of the first aspect, the DMRS indication message is And determining, by the user equipment, the DMRS pattern of the DMRS antenna port according to the DMRS indication message, where:

 Determining, by the user equipment, the subframe number of the subframe in which the downlink control information is located, or determining, according to the downlink control information, a subframe number of the subframe indicated by the downlink control information. ;

 The user equipment determines a DMRS pattern of the DMRS antenna port according to the subframe number.

 With reference to the eleventh possible implementation manner of the first aspect, in a twelfth possible implementation manner of the first aspect, the user equipment determines, according to the subframe number, a DMRS pattern of the DMRS antenna port, Includes:

If the difference between the subframe number of the subframe in which the current downlink control information is located and the subframe number of the subframe in which the previous downlink control information is located is greater than a preset value of the first number difference, the user equipment determines that the DMRS exists. The location of the time-frequency resource is the subframe in which the current downlink control information is located; or, if the subframe number of the subframe indicated by the current downlink control information is the same as the previous downlink control information, If the difference between the subframe numbers of the subframes is greater than the preset value of the second number difference, the user equipment determines that the location of the time-frequency resource in which the DMRS exists is the subframe indicated by the current downlink control information.

 With reference to the first aspect, or any one of the possible implementations of the first to twelfth implementations of the first aspect, in the thirteenth possible implementation of the first aspect, the time-frequency resource includes: A resource block group on a block pair, resource block group, half subframe, subframe, subframe group, or subframe group.

 With reference to the first aspect or any one of the possible implementation manners of the first to the thirteenth implementation manners of the first aspect, in the fourteenth possible implementation manner of the first aspect, in the M time-frequency resources All of the resources allocated to the user equipment use the same precoding, and the M is a natural number.

 With reference to the first aspect, or any one of the possible implementation manners of the first to the fourteenth implementation manners of the first aspect, in a fifteenth possible implementation manner of the first aspect, the user equipment according to the DMRS After the DMRS pattern of the antenna port acquires the DMRS, the method further includes:

 And the user equipment acquires a mapping relationship between the PDSCH and/or the EPDCCH and the resource element according to the DMRS pattern of the DMRS antenna port;

 The user equipment acquires the PDSCH and/or the EPDCCH according to the mapping relationship; the user equipment demodulates the PDSCH and/or the EPDCCH according to the DMRS; or the user equipment performs channel quality according to the DMRS. Indicates CQI calculation.

 With reference to the first aspect, or any one of the possible implementations of the first to the fourteenth implementations of the first aspect, in the sixteenth possible implementation manner of the first aspect, the method further includes:

 Determining, by the user equipment, an additional DMRS pattern of the DMRS antenna port, where the additional DMRS pattern is a location of a time-frequency resource in which a zero-power DMRS exists and/or a resource element occupied by the zero-power DMRS in the time-frequency resource s position;

 And the user equipment acquires a mapping relationship between the PDSCH and/or the EPDCCH and the resource element according to the DMRS pattern of the DMRS antenna port and/or the additional DMRS pattern;

 And the user equipment acquires the PDSCH and/or the EPDCCH according to the mapping relationship; and the user equipment demodulates the PDSCH and/or the EPDCCH according to the DMRS.

A sixteenth possible implementation manner of the first aspect, in the seventeenth possible implementation manner of the first aspect, the user equipment determining an additional DMRS pattern of the DMRS antenna port, including: Determining, by the user equipment, an additional DMRS pattern of the DMRS antenna port according to the DMRS indication message; or

 Receiving, by the user equipment, an additional DMRS indication message sent by the base station;

 The user equipment determines an additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message.

 With reference to the first aspect, or any one of the first to the seventeenth implementation manners of the first aspect, in the eighteenth possible implementation manner of the first aspect, the user equipment Before the DMRS indication message, it also includes:

 The user equipment selects at least one DMRS pattern from the DMRS pattern candidate set; the user equipment sends the at least one DMRS pattern to the base station by using a high layer signaling or a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) to And causing the base station to determine a DMRS pattern of the DMRS antenna port according to the at least one DMRS pattern.

 In conjunction with the eighteenth possible implementation of the first aspect, in the nineteenth possible implementation manner of the first aspect, the user equipment, by selecting at least one DMRS pattern from the DMRS pattern candidate set, includes:

 And the user equipment selects the at least one DMRS pattern from the DMRS pattern candidate set according to the moving speed or downlink channel information of the user equipment or the DMRS processing capability of the user equipment.

 In conjunction with the eighteenth possible implementation of the first aspect, or the nineteenth possible implementation of the first aspect, in a twentieth possible implementation of the first aspect, the user equipment A DMRS pattern is sent to the base station by using high layer signaling or PUCCH or PUSCH, including:

 The user equipment sends the rank indication together with the at least one DMRS pattern to the base station through the high layer signaling or PUCCH or PUSCH.

 In conjunction with the twentieth possible implementation of the first aspect, in a twenty-first possible implementation manner of the first aspect, the user equipment, by using the high-level signaling, the rank indication and the at least one DMRS pattern Or sending the PUCCH or the PUSCH to the base station, including:

The user equipment jointly encodes the rank indication and the at least one DMRS pattern; the user equipment sends the jointly encoded rank indication and the at least one DMRS pattern to the base station by using the high layer signaling or PUCCH or PUSCH. With reference to the first aspect, or any one of the possible implementation manners of the first to the seventeenth implementation manners of the first aspect, in a second or a second possible implementation manner of the first aspect, the user equipment Before the DMRS indication message, it also includes:

 The user equipment reports the DMRS processing capability indication information to the base station, so that the base station determines, according to the DMRS processing capability indication message, the number of DMRS patterns that the user equipment can process and/or the user equipment can process DMRS pattern.

 In a second aspect, the embodiment of the present invention further provides a DMRS transmission method, including:

 The base station determines a DMRS pattern of the DMRS antenna port;

 The eNB sends a DMRS indication message to the user equipment, where the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, where the DMRS pattern is a location of a time-frequency resource in which the DMRS exists and/or a resource occupied by the DMRS. Positioning the element in the time-frequency resource, so that the user equipment determines a DMRS pattern of the DMRS antenna port according to the DMRS indication message, and acquires the DMRS according to a DMRS pattern of the DMRS antenna port;

 The base station sends the DMRS to the user equipment according to the DMRS pattern.

 In a first possible implementation manner of the second aspect, the base station sends the user equipment

a DMRS indication message, where the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, including:

 The base station sends a DMRS indication message to the user equipment, where the one DMRS indication message is used to indicate a DMRS pattern of at least one DMRS antenna port; or

 The base station sends at least two DMRS indication messages to the user equipment, and each DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port.

 With reference to the second aspect, or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, including:

 The DMRS indication message includes a density of the DMRS, a spacing of the DMRS, a bitmap encoding of the DMRS, and/or a location of a time-frequency resource in which the DMRS does not exist, a density of the DMRS, a spacing of the DMRS, and the bitmap of the DMRS. The location of the time-frequency resource that encodes and/or the absence of the DMRS is used to determine the DMRS pattern of the DMRS antenna port.

With reference to the second aspect, or the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, The device sends a DMRS indication message, including:

 The base station sends cell-specific signaling to the user equipment by using a system information block, a main message block, a high layer signaling, a media access control signaling, a set sequence in a cyclic prefix, or a set scrambling code in a cyclic prefix. .

 With reference to the third possible implementation of the second aspect, in a fourth possible implementation manner of the second aspect, the determining, by the base station, the DMRS pattern of the DMRS antenna port includes:

 Determining, by the base station, a DMRS pattern of the DMRS antenna port according to the cell type;

 The cell-specific signaling includes a cell type corresponding to the base station, so that the user equipment determines the cell type according to the cell-specific signaling, and determines the DMRS according to the cell type. The DMRS pattern of the antenna port.

 With reference to the second aspect, or the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, The device sends a DMRS indication message, including:

 The base station sends user equipment specific signaling to the user equipment by using high layer signaling or medium access control signaling.

 With reference to the fifth possible implementation of the second aspect, in a sixth possible implementation manner of the second aspect, the determining, by the base station, the DMRS pattern of the DMRS antenna port includes:

 Determining, by the base station, a DMRS pattern of a DMRS antenna port according to a transmission mode of the physical downlink shared channel PDSCH;

 The user equipment-specific signaling includes a transmission mode of the PDSCH, so that the user equipment determines a transmission mode of the PDSCH according to the user equipment-specific signaling, and according to the transmission mode of the PDSCH, Determining a DMRS pattern of the DMRS antenna port.

 With reference to the third possible implementation manner of the second aspect or the fifth possible implementation manner of the second aspect, in a seventh possible implementation manner of the second aspect, the DMRS indication message is further used to indicate the following Any one or more kinds of information: a maximum modulation order of the received data, a modulation coding scheme table of the received data, a maximum modulation order of the transmitted data, a modulation coding scheme table of the transmission data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, the sounding reference signal configuration parameter including a period of the sounding reference signal and a subframe offset.

In conjunction with the fourth possible implementation of the second aspect, the eighth possible implementation in the second aspect In the current mode, the cell type is further used to determine any one or more of the following information: a maximum modulation order of the received data, a modulation and coding scheme table of the received data, a maximum modulation order of the transmitted data, and modulation of the transmitted data. a coding scheme table, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, the sounding reference signal configuration parameter including a period of the sounding reference signal and a subframe offset.

 With reference to the sixth possible implementation of the second aspect, in a ninth possible implementation manner of the second aspect, the transmission mode of the PDSCH is further used to determine any one or more of the following information: Maximum modulation order, modulation coding scheme table of received data, maximum modulation order of transmitted data, modulation coding scheme table of transmission data, channel quality indication table, downlink control area configuration, table of uplink sounding reference signal configuration parameters, downlink control The information format and the feedback mode, the sounding reference signal configuration parameter includes a period of the sounding reference signal and a subframe offset.

 With reference to the second aspect, or the first possible implementation of the second aspect, or the second possible implementation of the second aspect, in a tenth possible implementation manner of the second aspect, The device sends a DMRS indication message, including:

 The base station passes a physical downlink control channel PDCCH or an enhanced physical downlink control channel

The EPDCCH sends dynamic signaling to the user equipment, so that the user equipment determines a DMRS pattern of the DMRS antenna port according to the dynamic signaling, where the dynamic signaling includes any one or more of the following information: N Bit signaling, signaling indicating a redundancy version, signaling indicating a modulation and coding scheme MCS, signaling indicating a number of antenna ports, scrambling code sequence and layer number, and new data indicating signaling, the N being a natural number.

 With reference to the second aspect, or the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, in an eleventh possible implementation manner of the second aspect, The user equipment sends a DMRS indication message, including:

 The base station sends the downlink control information to the user equipment by using the physical downlink control channel PDCCH, so that the user equipment determines the subframe number of the subframe in which the downlink control information is located according to the downlink control information, or Determining, by the user equipment, a subframe number of the subframe indicated by the downlink control information according to the downlink control information, and determining a DMRS pattern of the DMRS antenna port according to the subframe number.

With reference to the second aspect, or any one of the possible implementation manners of the first to the eleventh implementation manners of the second aspect, in the twelfth possible implementation manner of the second aspect, the time-frequency resource Includes: resource block pairs, resource block groups, half subframes, subframes, subframe groups, or resource block groups on a subframe group.

 With reference to the second aspect or any one of the possible implementations of the first to twelfth implementations of the second aspect, in the thirteenth possible implementation manner of the second aspect, the M time-frequency resources are All of the resources allocated to the user equipment use the same precoding, and the M is a natural number.

 With reference to the second aspect or any one of the possible implementation manners of the first to the thirteenth implementation manners of the second aspect, in the fourteenth possible implementation manner of the second aspect, the base station determines the DMRS antenna port After the DMRS pattern, it also includes:

 The base station performs PDSCH and/or according to a DMRS pattern of the DMRS antenna port.

Resource mapping of EPDCCH and resource elements;

 The base station sends the PDSCH and/or EPDCCH to the user equipment.

 With reference to the second aspect, or any one of the first to the thirteenth implementation manners of the second aspect, the fifteenth possible implementation manner of the second aspect,

 Determining, by the base station, an additional DMRS pattern of the DMRS antenna port;

 Performing, by the base station, resource mapping of a PDSCH and/or an EPDCCH and a resource element according to a DMRS pattern of the DMRS antenna port and/or an additional DMRS pattern, where the additional DMRS pattern is a location and/or a time-frequency resource in which a zero-power DMRS exists. a location of the resource element occupied by the zero-power DMRS in the time-frequency resource;

 The base station sends the PDSCH and/or EPDCCH to the user equipment.

 In conjunction with the fifteenth possible implementation of the second aspect, in a sixteenth possible implementation manner of the second aspect, the DMRS indication message is further used to indicate an addition of the DMRS antenna port

a DMRS pattern, to enable the user equipment to determine an additional DMRS pattern of the DMRS antenna port according to the DMRS indication message; or

 After the base station determines the additional DMRS pattern of the DMRS antenna port, the method further includes: the base station sending an additional DMRS indication message to the user equipment, where the additional DMRS indication message is used to indicate an additional DMRS pattern of the DMRS antenna port And causing the user equipment to determine an additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message.

Any one of the first to thirteenth implementations of the second aspect or the second aspect The implementation is combined with the second aspect or any one of the first to the sixteenth implementation manners of the second aspect. In the seventeenth possible implementation manner of the second aspect, the base station determines the DMRS antenna Before the DMRS pattern of the port, it also includes:

 Receiving, by the base station, at least one DMRS pattern sent by the user equipment by using the high layer signaling or the physical uplink control channel PUCCH or the physical uplink shared channel PUSCH, the at least one

a DMRS pattern is selected by the user equipment from a set of DMRS pattern candidates;

 The base station determines a DMRS pattern of the DMRS antenna port, including:

 Determining, by the base station, the DMRS antenna port according to the at least one DMRS pattern

DMRS pattern.

 With the seventeenth possible implementation of the second aspect, in the eighteenth possible implementation manner of the second aspect, the at least one DMRS pattern is the user equipment according to the moving speed or the downlink of the user equipment Channel information or DMRS processing capabilities of the user equipment are selected from the set of DMRS pattern candidates.

 With reference to the seventeenth possible implementation of the second aspect, or the eighteenth possible implementation manner of the second aspect, in a nineteenth possible implementation manner of the second aspect, the base station receives the user equipment At least one DMRS pattern sent by the high layer signaling or PUCCH or PUSCH, including:

 And the base station receives a rank indication sent by the user equipment by using the high layer signaling or a PUCCH or a PUSCH, and the at least one DMRS pattern.

 With reference to the nineteenth possible implementation manner of the second aspect, in a twentieth possible implementation manner of the second aspect, the base station receives a rank that is sent by the user equipment by using the high layer signaling or a PUCCH or a PUSCH And the at least one DMRS pattern, including:

 And the base station receives the jointly encoded rank indication and the at least one DMRS pattern sent by the user equipment by using the high layer signaling or PUCCH or PUSCH.

 With reference to the second aspect, or any one of the first to the sixteenth implementation manners of the second aspect, in the twenty-first possible implementation manner of the second aspect, the base station determines the DMRS antenna port Before the DMRS pattern, it also includes:

 Receiving, by the base station, DMRS processing capability indication information reported by the user equipment;

The base station determines, according to the DMRS processing capability indication information, the number of DMRS patterns that the user equipment can process and/or the DMRS pattern that the user equipment can process. With reference to the second aspect, or any one of the possible implementation manners of the first to the twenty-first implementation manners of the second aspect, in the twenty-second possible implementation manner of the second aspect, At least two candidate DMRS patterns of the DMRS antenna port have overlapping resource elements in the same time-frequency resource, and then map the same on the overlapping resource elements in the same time-frequency resource according to the at least two candidate DMRS patterns. DMRS.

 In a third aspect, an embodiment of the present invention provides a user equipment, including:

 a receiving module, configured to receive a DMRS indication message sent by the base station, where the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, where the DMRS pattern is a location of a time-frequency resource in which the DMRS exists and/or a resource occupied by the DMRS a location of the element in the time-frequency resource; a determining module, configured to determine, according to the DMRS indication message received by the receiving module

DMRS pattern of the DMRS antenna port;

 And an obtaining module, configured to acquire the DMRS according to a DMRS pattern of the DMRS antenna port determined by the determining module.

 In a first possible implementation manner of the third aspect, the receiving module is specifically configured to: receive a DMRS indication message sent by the base station, where the one DMRS indication message is used to indicate a DMRS pattern of at least one DMRS antenna port Or,

 Receiving at least two DMRS indication messages sent by the base station, each DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port.

 With the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the DMRS indication message received by the receiving module is used to indicate a DMRS of a DMRS antenna port Patterns, including:

 The DMRS indication message is used to indicate a density of the DMRS, a spacing of the DMRS, a bitmap encoding of the DMRS, and/or a location of a time-frequency resource in which the DMRS does not exist, where the density of the DMRS, the interval of the DMRS, and the DMRS The bitmap encoding and/or the location of the time-frequency resource in which the DMRS does not exist is used to determine the DMRS pattern of the DMRS antenna port.

With reference to the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, The DMRS indication message is a cell-specific message sent by the base station by using a system information block, a main message block, a high layer signaling, a media access control signaling, a set sequence in a cyclic prefix, or a set scrambling code in a cyclic prefix. make. With reference to the third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the cell-specific signaling received by the receiving module includes a cell type corresponding to the base station;

 The determining module is specifically configured to obtain a cell type according to the cell-specific signaling received by the receiving module, and determine a DMRS pattern of the DMRS antenna port according to the cell type.

 With reference to the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, The DMRS indication message is user equipment specific signaling sent by the base station by using high layer signaling or medium access control signaling.

 With reference to the fifth possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the user equipment specific signaling received by the receiving module includes a transmission mode of a physical downlink shared channel (PDSCH) ;

 The determining module is specifically configured to acquire a transmission mode of the PDSCH according to the user equipment proprietary signal received by the receiving module, and determine a DMRS pattern of the DMRS antenna port according to the transmission mode of the PDSCH.

 With reference to the third possible implementation manner of the third aspect, or the fifth possible implementation manner of the third aspect, in a seventh possible implementation manner of the third aspect, the DMRS indication message that is received by the receiving module It is further used to indicate any one or more of the following information: a maximum modulation order of the received data, a modulation coding scheme table of the received data, a maximum modulation order of the transmitted data, a modulation coding scheme table of the transmission data, and a channel quality indication table. a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, where the sounding reference signal configuration parameter includes a period of the sounding reference signal and a subframe offset.

 With reference to the fourth possible implementation manner of the third aspect, in the eighth possible implementation manner of the third aspect, the determining module is further configured to determine any one or more of the following information according to the cell type : maximum modulation order of received data, modulation coding scheme table of received data, maximum modulation order of transmitted data, modulation coding scheme table of transmission data, channel quality indication table, downlink control area configuration, uplink sounding reference signal configuration parameter a table, a downlink control information format, and a feedback mode, the sounding reference signal configuration parameter including a period of the sounding reference signal and a subframe offset.

With the sixth possible implementation of the third aspect, in a ninth possible implementation manner of the third aspect, the determining module is further configured to determine, according to the transmission mode of the PDSCH, the following Any one or more kinds of information: a maximum modulation order of the received data, a modulation coding scheme table of the received data, a maximum modulation order of the transmitted data, a modulation coding scheme table of the transmission data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, the sounding reference signal configuration parameter including a period of the sounding reference signal and a subframe offset.

 With reference to the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, in a tenth possible implementation manner of the third aspect, The DMRS indication message is dynamic signaling that is sent by the base station by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel (EPDCCH), and the dynamic signaling includes any one or more of the following information: N-bit signaling, indication Redundant version of signaling, signaling indicating a modulation and coding scheme, signaling indicating the number of antenna ports, scrambling code sequence and layer number, and new data indicating signaling, where N is a natural number;

 The determining module is specifically configured to determine a DMRS pattern of the DMRS antenna port according to the dynamic signaling received by the receiving module.

 With reference to the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, in an eleventh possible implementation manner of the third aspect, The DMRS indication message is downlink control information that is sent by the base station by using a physical downlink control channel;

 The determining module is specifically configured to determine, according to the downlink control information received by the receiving module, a subframe number of a subframe in which the downlink control information is located, or according to the downlink control information received by the receiving module, Determining a subframe number of the subframe indicated by the downlink control information; and determining a DMRS pattern of the DMRS antenna port according to the subframe number.

 With reference to the eleventh possible implementation manner of the third aspect, in the twelfth possible implementation manner of the third aspect, the determining module is specifically configured to:

 Determining, if the difference between the subframe number of the subframe in which the current downlink control information is located and the subframe number of the subframe in which the previous downlink control information is located is greater than a preset value of the first number difference, determining the time-frequency resource in which the DMRS exists The location is the subframe in which the current downlink control information is located; or

Determining, if the difference between the subframe number of the subframe indicated by the current downlink control information and the subframe number of the subframe in which the previous downlink control information is located is greater than a preset value of the second number difference, determining the time frequency of the presence of the DMRS The location of the resource is the subframe indicated by the current downlink control information. With reference to the third aspect, or any one of the first to the twelfth implementation manners of the third aspect, in the thirteenth possible implementation manner of the third aspect, the time-frequency resource includes: A resource block group on a block pair, resource block group, half subframe, subframe, subframe group, or subframe group.

 With reference to the third aspect, or any one of the first to the thirteenth implementation manners of the third aspect, in the fourteenth possible implementation manner of the third aspect, in the M time-frequency resources All of the resources allocated to the user equipment use the same precoding, and the M is a natural number.

 With reference to the third aspect, or any one of the first to the fourteenth implementation manners of the third aspect, in a fifteenth possible implementation manner of the third aspect, the method further includes:

 a first processing module, configured to acquire, according to the DMRS pattern determined by the determining module, a mapping relationship between a PDSCH and/or an EPDCCH and a resource element; acquiring the PDSCH and/or an EPDCCH according to the mapping relationship; Acquiring the DMRS obtained by the module to demodulate the PDSCH and/or EPDCCH; or

 The first processing module is configured to perform channel quality indicator CQI calculation according to the DMRS acquired by the acquiring module.

 With reference to the third aspect or any one of the first to the fourteenth implementation manners of the third aspect, in a sixteenth possible implementation manner of the third aspect, the second processing module is further included;

 The determining module is further configured to determine an additional DMRS pattern of the DMRS antenna port, where the additional DMRS pattern is a location of a time-frequency resource with zero-power DMRS and/or a resource element occupied by the zero-power DMRS Location in the frequency resource;

 The second processing module is configured to obtain a mapping relationship between the PDSCH and/or the EPDCCH and the resource element according to the DMRS pattern and/or the additional DMRS pattern of the DMRS antenna port determined by the determining module; according to the mapping relationship, Acquiring the PDSCH and/or EPDCCH; demodulating the PDSCH and/or EPDCCH according to the DMRS.

With reference to the sixteenth possible implementation manner of the third aspect, in the seventeenth possible implementation manner of the third aspect, the determining module is specifically configured to be used by the second processing module according to the DMRS antenna port Determining, by the DMRS indication message, the DMRS antenna end, before acquiring a mapping relationship between the PDSCH and/or the EPDCCH and the resource element, the DMRS pattern and/or the additional DMRS pattern Additional DMRS pattern for the mouth; or,

 The receiving module is further configured to: before the second processing module acquires a mapping relationship between the PDSCH and/or the EPDCCH and the resource element according to the DMRS pattern of the DMRS antenna port and/or the additional DMRS pattern, receive the sending by the base station Additional DMRS indication message;

 The determining module is specifically configured to determine an additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message.

 With reference to the third aspect, or any one of the first to the seventeenth implementation manners of the third aspect, the eighteenth possible implementation manner of the third aspect,

 a selecting module, configured to select at least one DMRS pattern from the DMRS pattern candidate set before the receiving module receives the DMRS indication message sent by the base station;

 a first sending module, configured to send the at least one DMRS pattern selected by the selecting module to the base station by using a high layer signaling or a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH), so that the base station is configured according to the At least one DMRS pattern determines a DMRS pattern of the DMRS antenna port.

 In conjunction with the eighteenth possible implementation manner of the third aspect, in a nineteenth possible implementation manner of the third aspect, the selecting module is specifically configured to use, according to the moving speed or downlink channel information or location of the user equipment Determining, by the DMRS processing capability of the user equipment, the at least one DMRS pattern from the set of DMRS pattern candidates.

 With reference to the eighteenth possible implementation manner of the third aspect, or the nineteenth possible implementation manner of the third aspect, in the twentieth possible implementation manner of the third aspect, the first sending module is specifically used Passing the rank indication together with the at least one DMRS pattern through the high layer signaling or

A PUCCH or PUSCH is sent to the base station.

 In conjunction with the twentieth possible implementation of the third aspect, in a twenty-first possible implementation manner of the third aspect, the method further includes:

 a third processing module, configured to jointly encode the rank indicator and the at least one DMRS pattern;

 The first sending module is specifically configured to send the jointly encoded rank indication and the at least one DMRS pattern to the base station by using the high layer signaling or PUCCH or PUSCH.

With reference to the third aspect, or any one of the possible implementations of the first to the twentieth implementations of the third aspect, in a twenty-first possible implementation manner of the third aspect, the method further includes: a second sending module, configured to: after the receiving module receives the DMRS indication message sent by the base station, report the DMRS processing capability indication information to the base station, so that the base station determines the user according to the DMRS processing capability indication message The number of DMRS patterns that the device can process and/or the DMRS pattern that the user device can process.

 In a fourth aspect, an embodiment of the present invention provides a base station, including:

 a determining module, configured to determine a DMRS pattern of the DMRS antenna port;

 a sending module, configured to send a DMRS indication message to the user equipment, where the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, where the DMRS pattern is a location of a time-frequency resource in which the DMRS exists and/or the DMRS occupation a location of the resource element in the time-frequency resource, so that the user equipment determines a DMRS pattern of the DMRS antenna port according to the DMRS indication message, and acquires the DMRS according to a DMRS pattern of the DMRS antenna port; And transmitting the DMRS to the user equipment according to the DMRS pattern.

 In a first possible implementation manner of the fourth aspect, the sending module is specifically configured to: send, to the user equipment, a DMRS indication message, where the one DMRS indication message is used to indicate a DMRS pattern of the at least one DMRS antenna port Or,

 At least two DMRS indication messages are sent to the user equipment, each DMRS indication message being used to indicate a DMRS pattern of a DMRS antenna port.

 With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the DMRS indication message sent by the sending module is used to indicate a DMRS of a DMRS antenna port Patterns, including:

 The DMRS indication message includes a density of the DMRS, a spacing of the DMRS, a bitmap encoding of the DMRS, and/or a location of a time-frequency resource in which the DMRS does not exist, a density of the DMRS, a spacing of the DMRS, and the bitmap of the DMRS. The location of the time-frequency resource that encodes and/or the absence of the DMRS is used to determine the DMRS pattern of the DMRS antenna port.

 With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, or the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the sending module is specifically used to The cell-specific signaling is sent to the user equipment by a system information block, a main message block, a high layer signaling, a medium access control signaling, a set sequence in a cyclic prefix, or a set scrambling code in a cyclic prefix.

In conjunction with the third possible implementation of the fourth aspect, the fourth possible implementation in the fourth aspect In the current mode, the determining module is specifically configured to determine a DMRS pattern of the DMRS antenna port according to the cell type;

 The cell-specific signaling sent by the sending module includes a cell type corresponding to the base station, so that the user equipment determines the cell type according to the cell-specific signaling, and according to the cell Type, determining a DMRS pattern of the DMRS antenna port.

 With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, or the second possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, User equipment specific signaling is sent to the user equipment through high layer signaling or medium access control signaling.

 With reference to the fifth possible implementation manner of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the determining module is specifically configured to determine a DMRS pattern of the DMRS antenna port according to a transmission mode of the physical downlink shared channel (PDSCH) ;

 The user equipment-specific signaling sent by the sending module includes a transmission mode of the PDSCH, so that the user equipment determines a transmission mode of the PDSCH according to the user equipment-specific signaling, and according to the Decoding the transmission mode of the PDSCH, determining the DMRS antenna port

DMRS pattern.

 With reference to the third possible implementation manner of the fourth aspect, or the fifth possible implementation manner of the fourth aspect, in a seventh possible implementation manner of the fourth aspect, the DMRS indication message sent by the sending module It is further used to indicate any one or more of the following information: a maximum modulation order of the received data, a modulation coding scheme table of the received data, a maximum modulation order of the transmitted data, a modulation coding scheme table of the transmission data, and a channel quality indication table. a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, where the sounding reference signal configuration parameter includes a period of the sounding reference signal and a subframe offset.

 With reference to the fourth possible implementation manner of the fourth aspect, in an eighth possible implementation manner of the fourth aspect, the cell type is further used to determine any one or more of the following information: Maximum modulation of received data The order, the modulation coding scheme table of the received data, the maximum modulation order of the transmitted data, the modulation coding scheme table of the transmission data, the channel quality indication table, the downlink control region configuration, the table of the uplink sounding reference signal configuration parameters, and the downlink control information format And a feedback mode, the sounding reference signal configuration parameter includes a period of the sounding reference signal and a subframe offset.

In conjunction with the sixth possible implementation of the fourth aspect, the ninth possible implementation of the fourth aspect In the current mode, the transmission mode of the PDSCH is further used to determine any one or more of the following information: a maximum modulation order of the received data, a modulation coding scheme table of the received data, a maximum modulation order of the transmitted data, and a transmission data. a modulation coding scheme table, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, the sounding reference signal configuration parameter including a period and a subframe offset of the sounding reference signal .

 With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, or the second possible implementation manner of the fourth aspect, in a tenth possible implementation manner of the fourth aspect, Transmitting dynamic signaling to the user equipment by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH, so that the user equipment determines a DMRS pattern of the DMRS antenna port according to the dynamic signaling, where the dynamic signal is The command includes any one or more of the following: N-bit signaling, signaling indicating a redundancy version, signaling indicating a modulation coding scheme MCS, signaling indicating a number of antenna ports, scrambling code sequence and layer number, new The data transmission signaling indicates that the N is a natural number.

 With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, or the second possible implementation manner of the fourth aspect, in the eleventh possible implementation manner of the fourth aspect, And transmitting the downlink control information to the user equipment by using the physical downlink control channel PDCCH, so that the user equipment determines, according to the downlink control information, a subframe number of a subframe in which the downlink control information is located, or The user equipment determines, according to the downlink control information, a subframe number of the subframe indicated by the downlink control information, and determines a DMRS pattern of the DMRS antenna port according to the subframe number.

 With reference to the fourth aspect, or any one of the first to the eleventh implementation manners of the fourth aspect, in a twelfth possible implementation manner of the fourth aspect, the time-frequency resource includes: A resource block group on a block pair, resource block group, half subframe, subframe, subframe group, or subframe group.

 With reference to the fourth aspect, or any one of the possible implementation manners of the first to twelfth implementation manners of the fourth aspect, in the thirteenth possible implementation manner of the fourth aspect, in the M time-frequency resources All of the resources allocated to the user equipment use the same precoding, and the M is a natural number.

 With reference to the fourth aspect, or any one of the possible implementation manners of the first to the thirteenth implementation manners of the fourth aspect, in the fourteenth possible implementation manner of the fourth aspect, the method further includes:

a first processing module, configured to determine, in the determining module, a DMRS pattern of a DMRS antenna port Then, performing resource mapping of the PDSCH and/or the EPDCCH and the resource element according to the DMRS pattern;

 The sending module is further configured to send the PDSCH and/or the EPDCCH to the user equipment.

 With reference to the fourth aspect, or any one of the first to the thirteenth implementation manners of the fourth aspect, the fifteenth possible implementation manner of the fourth aspect, further includes a second processing module; The determining module is further configured to determine an additional DMRS pattern of the DMRS antenna port, where the additional DMRS pattern is a location of a time-frequency resource with zero-power DMRS and/or a resource element occupied by the zero-power DMRS at the time-frequency Location in the resource;

 The second processing module is configured to perform resource mapping of the PDSCH and/or the EPDCCH and the resource element according to the DMRS pattern and/or the additional DMRS pattern of the DMRS antenna port determined by the determining module;

 The sending module is further configured to send the PDSCH and/or the EPDCCH to the user equipment.

 With reference to the fifteenth possible implementation manner of the fourth aspect, in a sixteenth possible implementation manner of the fourth aspect, the DMRS indication message is further used to indicate an additional DMRS pattern of the DMRS antenna port, so that Determining, by the user equipment, an additional DMRS pattern of the DMRS antenna port according to the DMRS indication message; or

 The sending module is further configured to: after the determining module determines the additional DMRS pattern of the DMRS antenna port, send an additional DMRS indication message to the user equipment, where the additional DMRS indication message is used to indicate the DMRS antenna port An DMRS pattern is appended to cause the user equipment to determine an additional DMRS pattern for the DMRS antenna port based on the additional DMRS indication message.

 With reference to the fourth aspect, or any one of the first to the sixteenth implementation manners of the fourth aspect, the seventeenth possible implementation manner of the fourth aspect,

 a first receiving module, configured to receive, by the determining, the at least one DMRS pattern sent by the user equipment by using the high layer signaling or the physical uplink control channel PUCCH or the physical uplink shared channel PUSCH, before the determining module determines the DMRS pattern of the DMRS antenna port, The at least one DMRS pattern is selected by the user equipment from a set of DMRS pattern candidates;

The determining module is specifically configured to: according to the at least one DMRS map received by the first receiving module The DMRS pattern of the DMRS antenna port is determined.

 With reference to the seventeenth possible implementation manner of the foregoing aspect, in the eighteenth possible implementation manner of the fourth aspect, the at least one DMRS pattern is the user equipment according to the moving speed or the downlink of the user equipment Channel information or DMRS processing capabilities of the user equipment are selected from the set of DMRS pattern candidates.

 With the seventeenth possible implementation manner of the fourth aspect, or the eighteenth possible implementation manner of the fourth aspect, in the nineteenth possible implementation manner of the fourth aspect, the first receiving module is specifically used And receiving, by the user equipment, a rank indication sent by the high-layer signaling or a PUCCH or a PUSCH, and the at least one DMRS pattern.

 With reference to the eighteenth possible implementation manner of the foregoing aspect, in a twentieth possible implementation manner of the fourth aspect, the first receiving module is specifically configured to receive the user equipment by using the high layer signaling or The jointly encoded rank indication and at least one DMRS pattern transmitted by the PUCCH or PUSCH.

 With reference to the fourth aspect, or any one of the possible implementation manners of the first to the sixteenth implementation manners of the fourth aspect, in the twenty-first possible implementation manner of the fourth aspect, And receiving, before the determining module determines the DMRS pattern of the DMRS antenna port, the DMRS processing capability indication information reported by the user equipment;

 The determining module is further configured to determine, according to the DMRS processing capability indication information, a number of DMRS patterns that the user equipment can process and/or a DMRS pattern that the user equipment can process.

 With reference to the fourth aspect, or any one of the possible implementation manners of the first to the ninth implementation manners of the fourth aspect, in a twenty-second possible implementation manner of the fourth aspect, a module, configured to determine, if the at least two candidate DMRS patterns of the DMRS antenna port have overlapping resource elements in the same time-frequency resource, according to the at least two candidate DMRS patterns in the same time-frequency resource The same DMRS is mapped on overlapping resource elements.

 In a fifth aspect, the embodiment of the present invention further provides a user equipment, including:

a receiver, configured to receive a DMRS indication message sent by the base station, where the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, where the DMRS pattern is a location of a time-frequency resource where the DMRS exists and/or a resource occupied by the DMRS a location of the element in the time-frequency resource; a processor, configured to determine a DMRS pattern of the DMRS antenna port according to the DMRS indication message received by the receiver; and determine a DMRS antenna port according to the determining module The DMRS pattern acquires the DMRS.

 In a first possible implementation manner of the fifth aspect, the receiver is specifically configured to: receive a DMRS indication message sent by the base station, where the one DMRS indication message is used to indicate a DMRS pattern of at least one DMRS antenna port Or,

 Receiving at least two DMRS indication messages sent by the base station, each DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port.

 With reference to the fifth aspect, or the first possible implementation manner of the fifth aspect, in a second possible implementation manner of the fifth aspect, the DMRS indication message received by the receiver is used to indicate a DMRS of a DMRS antenna port Patterns, including:

 The DMRS indication message is used to indicate a density of the DMRS, a spacing of the DMRS, a bitmap encoding of the DMRS, and/or a location of a time-frequency resource in which the DMRS does not exist, where the density of the DMRS, the interval of the DMRS, and the DMRS The bitmap encoding and/or the location of the time-frequency resource in which the DMRS does not exist is used to determine the DMRS pattern of the DMRS antenna port.

 With reference to the fifth aspect, or the first possible implementation manner of the fifth aspect, or the second possible implementation manner of the fifth aspect, in a third possible implementation manner of the fifth aspect, The DMRS indication message is a cell-specific message sent by the base station by using a system information block, a main message block, a high layer signaling, a media access control signaling, a set sequence in a cyclic prefix, or a set scrambling code in a cyclic prefix. make.

 With reference to the third possible implementation manner of the fifth aspect, in a fourth possible implementation manner of the fifth aspect, the cell-specific signaling received by the receiver includes a cell type corresponding to the base station;

 The processor is specifically configured to obtain a cell type according to the cell-specific signaling received by the receiver, and determine a DMRS pattern of the DMRS antenna port according to the cell type.

 With reference to the fifth aspect or the first possible implementation manner of the fifth aspect, or the second possible implementation manner of the fifth aspect, in a fifth possible implementation manner of the fifth aspect, The DMRS indication message is user equipment specific signaling sent by the base station by using high layer signaling or medium access control signaling.

With reference to the fifth possible implementation manner of the fifth aspect, in a sixth possible implementation manner of the fifth aspect, the user equipment specific signaling received by the receiver includes a transmission mode of a physical downlink shared channel (PDSCH) ; The processor is specifically configured to acquire a transmission mode of the PDSCH according to the user equipment-specific signaling received by the receiver, and determine a DMRS pattern of the DMRS antenna port according to a transmission mode of the PDSCH.

 With reference to the third possible implementation manner of the fifth aspect, or the fifth possible implementation manner of the fifth aspect, in a seventh possible implementation manner of the fifth aspect, the DMRS indication message received by the receiver It is further used to indicate any one or more of the following information: a maximum modulation order of the received data, a modulation coding scheme table of the received data, a maximum modulation order of the transmitted data, a modulation coding scheme table of the transmission data, and a channel quality indication table. a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, where the sounding reference signal configuration parameter includes a period of the sounding reference signal and a subframe offset.

 With reference to the fourth possible implementation manner of the fifth aspect, in an eighth possible implementation manner of the fifth aspect, the processor is further configured to determine any one or more of the following information according to the cell type : maximum modulation order of received data, modulation coding scheme table of received data, maximum modulation order of transmitted data, modulation coding scheme table of transmission data, channel quality indication table, downlink control area configuration, uplink sounding reference signal configuration parameter a table, a downlink control information format, and a feedback mode, the sounding reference signal configuration parameter including a period of the sounding reference signal and a subframe offset.

 With reference to the sixth possible implementation manner of the fifth aspect, in a ninth possible implementation manner of the fifth aspect, the processor is further configured to determine, according to the transmission mode of the PDSCH, any one or more of the following Type of information: Maximum modulation order of received data, modulation coding scheme table of received data, maximum modulation order of transmitted data, modulation coding scheme table of transmission data, channel quality indication table, downlink control area configuration, uplink sounding reference signal configuration A table of parameters, a downlink control information format, and a feedback mode, the sounding reference signal configuration parameter including a period of the sounding reference signal and a subframe offset.

With reference to the fifth aspect or the first possible implementation manner of the fifth aspect, or the second possible implementation manner of the fifth aspect, in a tenth possible implementation manner of the fifth aspect, The DMRS indication message is dynamic signaling that is sent by the base station by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel (EPDCCH), where the dynamic signaling includes any one or more of the following information: N-bit signaling, indication Redundant version of signaling, signaling indicating a modulation and coding scheme, signaling indicating the number of antenna ports, scrambling code sequence and layer number, and new data indicating signaling, where N is a natural number; The processor is specifically configured to determine, according to the dynamic signaling received by the receiver,

DMRS pattern of the DMRS antenna port.

 With reference to the fifth aspect or the first possible implementation manner of the fifth aspect, or the second possible implementation manner of the fifth aspect, in an eleventh possible implementation manner of the fifth aspect, The DMRS indication message is downlink control information that is sent by the base station by using a physical downlink control channel;

 The processor is specifically configured to determine, according to the downlink control information received by the receiver, a subframe number of a subframe in which the downlink control information is located, or according to the downlink control information received by the receiving module, Determining a subframe number of the subframe indicated by the downlink control information; and determining a DMRS pattern of the DMRS antenna port according to the subframe number.

 With reference to the eleventh possible implementation manner of the fifth aspect, in a twelfth possible implementation manner of the fifth aspect, the processor is specifically configured to:

 Determining, if the difference between the subframe number of the subframe in which the current downlink control information is located and the subframe number of the subframe in which the previous downlink control information is located is greater than a preset value of the first number difference, determining the time-frequency resource in which the DMRS exists The location is the subframe in which the current downlink control information is located; or

 Determining, if the difference between the subframe number of the subframe indicated by the current downlink control information and the subframe number of the subframe in which the previous downlink control information is located is greater than a preset value of the second number difference, determining the time frequency of the presence of the DMRS The location of the resource is the subframe indicated by the current downlink control information.

 With reference to the fifth aspect, or any one of the first to the twelfth implementation manners of the fifth aspect, in the thirteenth possible implementation manner of the fifth aspect, the time-frequency resource includes: A resource block group on a block pair, resource block group, half subframe, subframe, subframe group, or subframe group.

 With reference to the fifth aspect, or any one of the possible implementation manners of the first to the thirteenth implementation manners of the fifth aspect, in the fourteenth possible implementation manner of the fifth aspect, in the M time-frequency resources All of the resources allocated to the user equipment use the same precoding, and the M is a natural number.

With reference to the fifth aspect, or any one of the possible implementations of the first to the fourteenth implementations of the fifth aspect, in a fifteenth possible implementation manner of the fifth aspect, the processor is further configured to Obtaining, by the DMRS pattern, a mapping relationship between a PDSCH and/or an EPDCCH and a resource element; acquiring the PDSCH and/or an EPDCCH according to the mapping relationship; according to the DMRS Demodulating the PDSCH and/or EPDCCH; or

 The processor is further configured to perform channel quality indication CQI calculation according to the DMRS acquired by the acquiring module.

 With reference to the fifth aspect, or any one of the possible implementations of the first to the fourteenth implementations of the fifth aspect, in a sixteenth possible implementation manner of the fifth aspect, the processor is further configured to determine An additional DMRS pattern of the DMRS antenna port, where the additional DMRS pattern is a location of a time-frequency resource in which a zero-power DMRS exists and/or a location of a resource element occupied by the zero-power DMRS in the time-frequency resource; And a DMRS pattern of the DMRS antenna port and/or an additional DMRS pattern, acquiring a mapping relationship between the PDSCH and/or the EPDCCH and the resource element; acquiring the PDSCH and/or the EPDCCH according to the mapping relationship; and demodulating according to the DMRS The PDSCH and/or EPDCCH.

 With reference to the sixteenth possible implementation manner of the fifth aspect, in a seventeenth possible implementation of the fifth aspect, the processor is specifically configured to: according to the DMRS pattern of the DMRS antenna port and/or an additional DMRS a pattern, before acquiring a mapping relationship between the PDSCH and/or the EPDCCH and the resource element, determining an additional DMRS pattern of the DMRS antenna port according to the DMRS indication message; or

 The receiver is further configured to: before the processor acquires a mapping relationship between a PDSCH and/or an EPDCCH and a resource element according to a DMRS pattern and/or an additional DMRS pattern of the DMRS antenna port, receive an additional DMRS sent by the base station. Indication message

 The processor is specifically configured to determine an additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message.

 With reference to the fifth aspect, or any one of the possible implementation manners of the first to the seventeenth implementation manners of the fifth aspect, in the eighteenth possible implementation manner of the fifth aspect, Before receiving the DMRS indication message sent by the base station, the receiver selects at least one DMRS pattern from the DMRS pattern candidate set;

 The user equipment further includes: a transmitter;

Transmitting, by the transmitter, the at least one DMRS pattern selected by the processor to the base station by using a high layer signaling or a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH), so that the base station is configured according to the At least one DMRS pattern determines a DMRS pattern of the DMRS antenna port. With the eighteenth possible implementation manner of the fifth aspect, in a nineteenth possible implementation manner of the fifth aspect, the processor is specifically configured to use, according to the moving speed or downlink channel information or location of the user equipment Determining, by the DMRS processing capability of the user equipment, the at least one DMRS pattern from the set of DMRS pattern candidates.

 With reference to the eighteenth possible implementation manner of the fifth aspect or the nineteenth possible implementation manner of the fifth aspect, in a twentieth possible implementation manner of the fifth aspect, the The rank indication is transmitted to the base station together with the at least one DMRS pattern through the higher layer signaling or PUCCH or PUSCH.

 In conjunction with the twentieth possible implementation of the fifth aspect, in a twenty-first possible implementation manner of the fifth aspect, the processor is further configured to jointly encode the rank indicator and the at least one DMRS pattern ;

 The transmitter is specifically configured to send the jointly encoded rank indication and the at least one DMRS pattern to the base station by using the high layer signaling or PUCCH or PUSCH.

 With reference to the fifth aspect or any one of the possible implementations of the first to the twentieth implementations of the fifth aspect, in the twenty-first possible implementation manner of the fifth aspect, the transmitter is further used Before the receiving the DMRS indication message sent by the base station, the DMRS processing capability indication information is reported to the base station, so that the base station determines, according to the DMRS processing capability indication message, a DMRS pattern that can be processed by the user equipment. The number and/or DMRS pattern that the user equipment is capable of processing.

 In a sixth aspect, the embodiment of the present invention further provides a base station, including:

 a processor, configured to determine a DMRS pattern of the DMRS antenna port;

 a transmitter, configured to send a DMRS indication message to the user equipment, where the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, where the DMRS pattern is a location of a time-frequency resource in which the DMRS exists and/or the DMRS is occupied. a location of the resource element in the time-frequency resource, so that the user equipment determines a DMRS pattern of the DMRS antenna port according to the DMRS indication message, and acquires the DMRS according to a DMRS pattern of the DMRS antenna port; And transmitting the DMRS to the user equipment according to the DMRS pattern.

In a first possible implementation manner of the sixth aspect, the transmitter is specifically configured to: send, to the user equipment, a DMRS indication message, where the one DMRS indication message is used to indicate a DMRS pattern of the at least one DMRS antenna port Or, Sending at least two DMRS indication messages to the user equipment, each DMRS indication message is used to indicate a DMRS pattern of one DMRS antenna port.

 With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in a second possible implementation manner of the sixth aspect, the DMRS indication message sent by the transmitter is used to indicate a DMRS of a DMRS antenna port Patterns, including:

 The DMRS indication message includes a density of the DMRS, a spacing of the DMRS, a bitmap encoding of the DMRS, and/or a location of a time-frequency resource in which the DMRS does not exist, a density of the DMRS, a spacing of the DMRS, and the bitmap of the DMRS. The location of the time-frequency resource that encodes and/or the absence of the DMRS is used to determine the DMRS pattern of the DMRS antenna port.

 With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, or the second possible implementation manner of the sixth aspect, in a third possible implementation manner of the sixth aspect, the The cell-specific signaling is sent to the user equipment by a system information block, a main message block, a high layer signaling, a medium access control signaling, a set sequence in a cyclic prefix, or a set scrambling code in a cyclic prefix.

 With reference to the third possible implementation manner of the sixth aspect, in a fourth possible implementation manner of the sixth aspect, the processor is specifically configured to determine a DMRS pattern of the DMRS antenna port according to the cell type;

 The cell-specific signaling sent by the transmitter includes a cell type corresponding to the base station, so that the user equipment determines the cell type according to the cell-specific signaling, and according to the cell Type, determining a DMRS pattern of the DMRS antenna port.

 With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, or the second possible implementation manner of the sixth aspect, in a fifth possible implementation manner of the sixth aspect, the User equipment specific signaling is sent to the user equipment through high layer signaling or medium access control signaling.

 With reference to the fifth possible implementation manner of the sixth aspect, in a sixth possible implementation manner of the sixth aspect, the processor is specifically configured to determine a DMRS pattern of the DMRS antenna port according to a transmission mode of the physical downlink shared channel (PDSCH) ;

The user equipment-specific signaling sent by the transmitter includes a transmission mode of the PDSCH, so that the user equipment determines a transmission mode of the PDSCH according to the user equipment-specific signaling, and according to the Describe the transmission mode of the PDSCH, and determine the DMRS pattern of the DMRS antenna port. With reference to the third possible implementation manner of the sixth aspect, or the fifth possible implementation manner of the sixth aspect, in a seventh possible implementation manner of the sixth aspect, the DMRS indication message sent by the transmitter It is further used to indicate any one or more of the following information: a maximum modulation order of the received data, a modulation coding scheme table of the received data, a maximum modulation order of the transmitted data, a modulation coding scheme table of the transmission data, and a channel quality indication table. a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, where the sounding reference signal configuration parameter includes a period of the sounding reference signal and a subframe offset.

 With reference to the fourth possible implementation manner of the sixth aspect, in an eighth possible implementation manner of the sixth aspect, the cell type is further used to determine any one or more of the following information: Maximum modulation of received data The order, the modulation coding scheme table of the received data, the maximum modulation order of the transmitted data, the modulation coding scheme table of the transmission data, the channel quality indication table, the downlink control region configuration, the table of the uplink sounding reference signal configuration parameters, and the downlink control information format And a feedback mode, the sounding reference signal configuration parameter includes a period of the sounding reference signal and a subframe offset.

 With reference to the sixth possible implementation manner of the sixth aspect, in a ninth possible implementation manner of the sixth aspect, the transmission mode of the PDSCH is further used to determine any one or more of the following information: Maximum modulation order, modulation coding scheme table of received data, maximum modulation order of transmitted data, modulation coding scheme table of transmission data, channel quality indication table, downlink control area configuration, table of uplink sounding reference signal configuration parameters, downlink control The information format and the feedback mode, the sounding reference signal configuration parameter includes a period of the sounding reference signal and a subframe offset.

 With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, or the second possible implementation manner of the sixth aspect, in a tenth possible implementation manner of the sixth aspect, the Transmitting dynamic signaling to the user equipment by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH, so that the user equipment determines a DMRS pattern of the DMRS antenna port according to the dynamic signaling, where the dynamic signal is The command includes any one or more of the following: N-bit signaling, signaling indicating a redundancy version, signaling indicating a modulation coding scheme MCS, signaling indicating a number of antenna ports, scrambling code sequence and layer number, new The data transmission signaling indicates that the N is a natural number.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, or the second possible implementation manner of the sixth aspect, in the eleventh possible implementation manner of the sixth aspect, Sending downlink control information to the user equipment by using the physical downlink control channel PDCCH, so that the user equipment determines, according to the downlink control information, where the downlink control information is located. a subframe number of the subframe, or the user equipment, according to the downlink control information, determining a subframe number of the subframe indicated by the downlink control information, and determining, according to the subframe number, the subframe number

DMRS pattern of the DMRS antenna port.

 With reference to the sixth aspect, or any one of the first to the eleventh implementation manners of the sixth aspect, in a twelfth possible implementation manner of the sixth aspect, the time-frequency resource includes: A resource block group on a block pair, resource block group, half subframe, subframe, subframe group, or subframe group.

 With reference to the sixth aspect, or any one of the possible implementation manners of the first to the twelfth implementation manners of the sixth aspect, in the thirteenth possible implementation manner of the sixth aspect, in the M time-frequency resources All of the resources allocated to the user equipment use the same precoding, and the M is a natural number.

 With reference to the sixth aspect, or any one of the possible implementation manners of the first to the thirteenth implementation manners of the sixth aspect, in the fourteenth possible implementation manner of the sixth aspect, the processor is further used to After determining the DMRS pattern of the DMRS antenna port, performing resource mapping of the PDSCH and/or the EPDCCH and the resource element according to the DMRS pattern;

 The transmitter is further configured to send the PDSCH and/or EPDCCH to the user equipment. With reference to the sixth aspect, or any one of the first to the thirteenth implementation manners of the sixth aspect, in a fifteenth possible implementation manner of the sixth aspect, the processor is further configured to determine An additional DMRS pattern of the DMRS antenna port, where the additional DMRS pattern is a location of a time-frequency resource in which a zero-power DMRS exists and/or a location of a resource element occupied by the zero-power DMRS in the time-frequency resource; Determining a DMRS pattern of the DMRS antenna port and/or an additional DMRS pattern to perform resource mapping of the PDSCH and/or the EPDCCH and the resource element; the transmitter is further configured to send the PDSCH and/or the EPDCCH to the user equipment . With reference to the fifteenth possible implementation manner of the sixth aspect, in a sixteenth possible implementation manner of the sixth aspect, the DMRS indication message is further used to indicate an additional DMRS pattern of the DMRS antenna port, so that Determining, by the user equipment, an additional DMRS pattern of the DMRS antenna port according to the DMRS indication message; or

The transmitter is further configured to send an additional DMRS indication message to the user equipment after the processor determines an additional DMRS pattern of the DMRS antenna port, where the additional DMRS indication message is used to indicate the DMRS antenna port Attaching a DMRS pattern to enable the user device root An additional DMRS pattern of the DMRS antenna port is determined in accordance with the additional DMRS indication message. With reference to the sixth aspect, or any one of the first to the sixteenth implementation manners of the sixth aspect, the seventeenth possible implementation manner of the sixth aspect,

 And receiving, by the receiver, at least one DMRS pattern that is sent by the user equipment by using the high layer signaling or the physical uplink control channel PUCCH or the physical uplink shared channel PUSCH, where the processor determines the DMRS pattern of the DMRS antenna port, where At least one DMRS pattern is selected by the user equipment from a set of DMRS pattern candidates;

 The processor is specifically configured to determine a DMRS pattern of the DMRS antenna port according to at least one DMRS pattern received by the receiver.

 In conjunction with the seventeenth possible implementation manner of the sixth aspect, in the eighteenth possible implementation manner of the sixth aspect, the at least one DMRS pattern is the user equipment according to the moving speed or the downlink of the user equipment Channel information or DMRS processing capabilities of the user equipment are selected from the set of DMRS pattern candidates.

 With the seventeenth possible implementation manner of the sixth aspect, or the eighteenth possible implementation manner of the sixth aspect, in a nineteenth possible implementation manner of the sixth aspect, the receiver is specifically configured to receive a rank indication sent by the user equipment by using the high layer signaling or PUCCH or PUSCH and the at least one DMRS pattern.

 With reference to the eighteenth possible implementation manner of the sixth aspect, in a twentieth possible implementation manner of the sixth aspect, the receiver is specifically configured to receive the user equipment by using the high layer signaling or PUCCH or The joint encoded rank indicator transmitted by the PUSCH and at least one DMRS pattern.

 With reference to the sixth aspect, or any one of the first to the sixteenth implementation manners of the sixth aspect, in a twenty-first possible implementation manner of the sixth aspect, the receiver is further used to Receiving, by the processor, the DMRS processing capability indication information reported by the user equipment, before determining, by the processor, the DMRS pattern of the DMRS antenna port;

 The processor is further configured to determine, according to the DMRS processing capability indication information, a number of DMRS patterns that the user equipment can process and/or a DMRS pattern that the user equipment can process.

With reference to the sixth aspect, or any one of the possible implementation manners of the first to the twenty-first implementation manners of the sixth aspect, in the twenty-second possible implementation manner of the sixth aspect, Determining, if the at least two candidate DMRS patterns of the DMRS antenna port have overlapping resource elements in the same time-frequency resource, according to the at least two candidate DMRS patterns in the same The same DMRS is mapped on overlapping resource elements in time-frequency resources.

 The demodulation reference signal transmission method, the user equipment, and the base station provided by the embodiment of the present invention receive the DMRS indication message sent by the base station before receiving the DMRS sent by the base station, so that the DMRS pattern can be obtained, that is, the time frequency of the DMRS is determined. The location of the resource and/or the location of the RE occupied by the DMRS in the time-frequency resource, the base station also sends the DMRS according to the DMRS pattern, so the user equipment can obtain the DMRS according to the DMRS pattern, and realize the base station when the DMRS overhead is low. The DMRS is sent to the user equipment according to the DMRS pattern with a lower DMRS cost, and the user equipment acquires the DMRS according to the DMRS pattern with lower overhead, which solves the problem in the prior art and improves the utilization of the RE, thereby enabling transmission of valid data. The increase in RE increases the data transfer rate. DRAWINGS

The drawings used in the embodiments or the description of the prior art are briefly described. It is obvious that the drawings in the following description are some embodiments of the present invention, and are not creative to those skilled in the art. Other drawings can also be obtained from these drawings on the premise of labor.

 1 is a schematic diagram of a DMRS pattern in the prior art;

 2 is a flowchart of Embodiment 1 of a DMRS transmission method according to the present invention;

 3 is a flowchart of Embodiment 2 of a DMRS transmission method according to the present invention;

 4 is a first schematic diagram of a DMRS pattern according to an embodiment of the present invention;

 FIG. 5 is a second schematic diagram of a DMRS pattern according to an embodiment of the present invention;

 FIG. 6 is a third schematic diagram of a DMRS pattern according to an embodiment of the present invention;

 7 is a schematic structural diagram of Embodiment 1 of a user equipment according to the present invention;

 8 is a schematic structural diagram of Embodiment 2 of a user equipment according to the present invention;

 9 is a schematic structural diagram of Embodiment 3 of a user equipment according to the present invention;

 10 is a schematic structural diagram of Embodiment 1 of a base station according to the present invention;

 11 is a schematic structural diagram of Embodiment 2 of a base station according to the present invention;

 12 is a schematic structural diagram of Embodiment 3 of a base station according to the present invention;

FIG. 13 is a schematic structural diagram of an embodiment of a DMRS transmission system according to the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. The embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

 2 is a flowchart of Embodiment 1 of a DMRS transmission method according to the present invention. As shown in FIG. 2, the method in this embodiment may include:

 Step 101: The user equipment receives the DMRS indication message sent by the base station, where the DMRS indication message is used to indicate the DMRS pattern of the DMRS antenna port, where the DMRS pattern is the location of the time-frequency resource in which the DMRS exists and/or the RE occupied by the DMRS in the time-frequency resource. position.

 Step 102: The user equipment determines a DMRS pattern of the DMRS antenna port according to the DMRS indication message.

 Step 103: The user equipment acquires the DMRS according to the DMRS pattern of the DMRS antenna port. In this embodiment, before the user equipment receives the DMRS sent by the base station, the user equipment further receives a DMRS indication message sent by the base station, where the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, where the DMRS pattern is a time-frequency resource in which the DMRS exists. The location and/or the location of the RE occupied by the DMRS in the time-frequency resource. Then, the user equipment can determine the DMRS pattern of the DMRS antenna port according to the DMRS indication message received from the base station, and also know that the base station is in accordance with the DMRS pattern. The user equipment sends the DMRS, so that the user equipment can determine which time-frequency resources are located in the time-frequency resources of the DMRS and/or the DMRS, so that the base station can obtain the base station according to the specific location of the RE occupied by the DMRS. DMRS sent by user equipment

 The DMRS antenna port described in the embodiment of the present invention refers to an antenna port for transmitting a DMRS and/or an antenna port for transmitting a PDSCH and/or an antenna port for transmitting an EPDCCH. For example, the DMRS antenna port may be the antenna port 7-14 and the antenna port 107-110 specified in the LTE R11 system.

The DMRS obtained by the user equipment in the embodiment of the present invention refers to a DMRS that has undergone channel propagation and superimposed interference noise, and the obtained DMRS may be expressed as S = S. H + Intf + Noise, S is the DMRS sent by the base station, the DMRS is obtained for the user equipment, H is the channel gain, and Intf is the interference signal, indicating the noise signal.

 In the prior art, the DMRS pattern specified in the LTE protocol is configured for the base station and the user equipment, respectively, so the base station can only send the DMRS according to the DMRS pattern specified in the LTE protocol, and the user equipment can only be based on the DMRS pattern specified in the LTE protocol. Obtaining the DMRS, the user equipment can only obtain the RED of the DMRS in the DMRS pattern specified in the LTE protocol, and the user equipment can only obtain the DMRS pattern according to the LTE protocol. DMRS, in order for the user equipment to receive the DMRS, the base station can only send the DMRS to the user equipment according to the DMRS pattern specified in the LTE protocol, thereby causing the utilization of the RE to decrease.

 The DMRS transmission method provided by the embodiment of the present invention receives the DMRS indication message sent by the base station before receiving the DMRS sent by the base station, so that the DMRS pattern can be obtained, that is, the location of the time-frequency resource in which the DMRS exists and/or the DMRS occupation is determined. The location of the RE in the time-frequency resource, the base station also sends the DMRS according to the DMRS pattern, so the user equipment can obtain the DMRS according to the DMRS pattern, and realize the DMRS pattern with low DMRS overhead of the base station when the DMRS overhead is low. The DMRS is sent to the user equipment, and the user equipment acquires the DMRS according to the DMRS pattern with low overhead, solves the problem in the prior art, and improves the utilization rate of the RE, thereby increasing the RE capable of transmitting valid data and improving data transmission. rate.

 FIG. 3 is a flowchart of Embodiment 2 of a DMRS transmission method according to the present invention. As shown in FIG. 3, the method in this embodiment may include:

 Step 201: The base station determines a DMRS pattern of the DMRS antenna port.

 Step 202: The base station sends a DMRS indication message to the user equipment, where the DMRS indication message is used to indicate the DMRS pattern of the DMRS antenna port, where the DMRS pattern is the location of the time-frequency resource in which the DMRS exists and/or the location of the RE occupied by the DMRS in the time-frequency resource. And determining, by the user equipment, the DMRS pattern of the DMRS antenna port according to the DMRS indication message, and acquiring the DMRS according to the DMRS pattern of the DMRS antenna port.

 Step 203: The base station sends the DMRS to the user equipment according to the DMRS pattern.

In this embodiment, the base station needs to send the DMRS to the user equipment according to a certain DMRS pattern. Therefore, the base station first determines the DMRS pattern of the DMRS antenna port according to the application scenario, and then sends the DMRS to the user equipment according to the determined DMRS pattern. Due to the base station The DMRS pattern of the DMRS antenna port may be determined from the plurality of DMRS pattern candidate sets. Therefore, in order for the user equipment to accurately obtain the DMRS sent by the base station, the base station needs to notify the user equipment of the DMRS pattern determined by the base station, and therefore, the base station Sending a DMRS indication message to the user equipment, where the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, where the DMRS pattern is a location of a time-frequency resource in which the DMRS exists and/or a location of the RE occupied by the DMRS in the time-frequency resource, so that the user The device receives the DMRS indication message, and can determine the DMRS pattern of the DMRS antenna port, and also knows that the base station sends the DMRS to the user equipment according to the DMRS pattern, that is, the DMRS and the RE are mapped according to the DMRS pattern, so that the user equipment can determine when The DMRS and/or the location of the RE occupied by the DMRS in the time-frequency resource are located in the frequency resource, so that the DMRS sent by the base station to the user equipment can be obtained from the REs according to the specific location of the RE occupied by the DMRS.

 In the prior art, the DMRS pattern specified in the LTE protocol is separately configured for the base station and the user equipment. In actual applications, whether the RE overhead occupied by the DMRS actually required to be transmitted is smaller than the RE overhead occupied by the DMRS in the DMRS pattern specified in the LTE protocol. The base station can only send the DMRS according to the DMRS pattern specified in the LTE protocol, thereby reducing the utilization rate of the RE.

 In the DMRS transmission method provided by the embodiment of the present invention, the DMRS pattern of the DMRS port is determined by the base station, that is, the location of the time-frequency resource in which the DMRS exists and/or the location of the RE occupied by the DMRS in the time-frequency resource is determined, and the DMRS pattern is The DMRS indication message is sent to the user equipment, and then the DMRS is sent to the user equipment according to the DMRS pattern, so that the user equipment acquires the DMRS according to the DMRS pattern indicated in the DMRS indication message, so that when the DMRS overhead is low, the base station compares according to the DMRS overhead. The low DMRS pattern sends the DMRS to the user equipment, and the user equipment acquires the DMRS according to the lower cost DMRS pattern, solves the problem in the prior art, and improves the utilization rate of the RE, thereby increasing the RE that can transmit valid data. Increased data transfer rate.

On the basis of the first embodiment of the present invention or the second embodiment of the present invention, the base station may send a DMRS indication message to the user equipment, and correspondingly, the user equipment receives a DMRS indication message sent by the base station, where the one DMRS indication message is used to indicate at least A DMRS pattern for a DMRS antenna port. Specifically, the DMRS patterns of different DMRS antenna ports may be the same, and one DMRS pattern may be determined by one DMRS indication message, and the DMRS patterns of all DMRS antenna ports are the DMRS patterns determined by the DMRS indication message; The DMRS pattern of the same DMRS antenna port may be different. For each antenna port, the correspondence between the DMRS indication message and the DMRS pattern may be defined in advance, so that the DMRS indication message and the DMRS indication message and the DMRS may be corresponding according to the same DMRS indication message and different antenna ports. Correspondence between patterns to determine DMRS patterns for different antenna ports. Thereby, the signaling overhead of the DMRS indication message can be reduced.

 Or, the base station sends at least two DMRS indication messages to the user equipment, and correspondingly, the user equipment receives at least two DMRS indication messages sent by the base station, where each DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port. Specifically, a DMRS indication message may only indicate a pattern of a DMRS antenna port, and DMRS patterns of different DMRS antenna ports may be different or the same, so that the RE overhead occupied by the DMRS may be different for different DMRS antenna ports. Thereby adapting to the DMRS density requirements of different DMRS antenna ports.

 The DMRS indication message is used to indicate the DMRS pattern of the DMRS antenna port, and the method includes: the foregoing DMRS indication message is used to indicate the density of the DMRS, the interval of the DMRS, the bitmap coding of the DMRS, and/or the location of the time-frequency resource without the DMRS. The density of the DMRS, the spacing of the DMRS, the bitmap encoding of the DMRS, and/or the location of the time-frequency resource without the DMRS are used to determine the DMRS pattern of the DMRS antenna port. Moreover, the time-frequency resource may include: an RB pair, an RB group, a half subframe, a subframe, a subframe group, or an RB group on a subframe group; the time-frequency resource may be predefined or configured by the base station to the user equipment.

 The density of the DMRS may be the number of REs occupied by the DMRS in the time-frequency resource. Since the density of the DMRS may correspond to the DMRS pattern, the DMRS pattern of the DMRS antenna port may be determined by the density of the DMRS, for example, the DMRS is occupied on the RB pair. The RE can be 12 (the DMRS pattern can be as shown in Figure 1, the DMRS occupies an RE overhead of 7%) or 4 (the DMRS pattern can be as shown in Figure 4, the DMRS occupies an RE overhead of 2.4%) or 2 (DMRS pattern) As shown in Figure 5, the DMRS occupies an RR overhead of 1.2% or 0.

The interval of the DMRS may be the number of intervals of the time-frequency resources in which the DMRS exists. If the number of the time-frequency resources of the DMRS is n, it indicates that one time-frequency resource exists in each of the n time-frequency resources, where DMRS exists. The location of the time-frequency resource in the n time-frequency resources may be predefined or may be notified to the user equipment by the base station; the interval between the DMRS and the DMRS pattern may be corresponding, and the interval of the DMRS may be Determine the DMRS antenna The DMRS pattern of the port, for example, the number of REs occupied by the DMRS on one RB pair may be 2, and the interval of the RB pairs in which the DMRS exists is 2, and the pilot pattern of the DMRS may be as shown in FIG. 6, where the DMRS is occupied. The RE overhead is 0.6%.

 The bitmap encoding of the DMRS may be Y bits, where each bit corresponds to at least one RE that may be occupied by the DMRS. If one bit is set to T, then at least one RE corresponding to the bit is occupied by the DMRS, if one bit It is set to 0, then the at least one RE corresponding to the bit is not occupied by the DMRS, for example, Y is 12, wherein each bit corresponds to the RE occupied by the DMRS in FIG. 1, if one bit is set to, Γ, Then, the RE corresponding to the bit is occupied by the DMRS. If a bit is set to 0, then the RE corresponding to the bit is not occupied by the DMRS, and for example, Y is 3, where each bit is occupied by the DMRS in FIG. The four REs belonging to the same subcarrier correspond to each other. If one bit is set to T, then the four REs corresponding to the bit are occupied by the DMRS. If one bit is set to 0, then the corresponding four bits of the bit are indicated. The RE is not occupied by the DMRS. Since the bitmap encoding of the DMRS and the DMRS pattern may have a corresponding relationship, the DMRS antenna port may be determined by the bitmap encoding of the DMRS. DMRS pattern.

 If the DMRS indication message indicates that there is no location of the time-frequency resource of the DMRS, the time-frequency resource of the DMRS may be determined accordingly. Since the location of the time-frequency resource without the DMRS may have a corresponding relationship with the DMRS pattern, the DMRS may be determined. The DMRS pattern of the antenna port.

Further, all the RBs of the M time-frequency resources that are scheduled to the user equipment use the same pre-coding, and M is a natural number. M may be 1, that is, all the RBs in the time-frequency resources are allocated to the RB of the user equipment using the same pre-coding; or, M may be the interval of the DMRS, and the time in the interval of the time-frequency resources of the DMRS exists. All the RBs in the frequency resource use the same precoding for the RBs of the user equipment. For example: As shown in Figure 6, the number of RB pairs with DMRS is 2, and the |J RB0 and RB1 use the same precoding, RB2 and RB3 uses the same precoding; or, M can be any natural number greater than 2. Specifically, the base station can configure a precoding RB group according to a predefined system bandwidth, and can also use the value of M by higher layer signaling. Notifying the user equipment, where the pre-coded RB group includes RBs in the M time-frequency resources, and all the RBs in the pre-coded RB group that are scheduled to the user equipment use the same pre-coding, and the user equipment can use the predefined system bandwidth. The value of M is determined, or the user equipment obtains the value of M according to the high layer signaling sent by the base station. The DMRS indication message sent by the base station or received by the user equipment and the DMRS pattern indicated by the DMRS indication message are exemplified below.

 Taking one subframe as an example, one subframe contains two slots, one slot is half a subframe, and the position of the RE occupied by the DMRS in the slot can be represented by (k, /) Where is the subcarrier number in the slot, and / is the number of the Orthogonal Frequency Division Multiplexing (OFDM) symbol in the slot.

 The value can be determined by the formula (1):

Figure imgf000039_0001

Wherein, the number of subcarriers included in one RB, for example, ^^ = 12 , "TM is the number of the RB," the value range of the PRB is {0, ..., N^' DL - l } , and WST^ is one time The maximum number of RBs in the slot is the first coefficient "' = 0,1,2; ' is the second coefficient, which is the DMRS antenna port number.

Figure imgf000039_0002

 The value can be determined by formula (2):

 / = /' mod 2 + 5 ( 2 )

/' is the third coefficient, where is the time slot number, mod represents the modulus

Figure imgf000039_0003

Yu Yun

Different DMRS patterns can be distinguished by different sets of values of m' and/or " PRB and/or n s and/or /'. The foregoing DMRS indication message may be a set of values of m', and/or a set of values of a set of PRBs , and/or a set of values, and/or a set of values of /'. The set of values of m' may indicate the density of the DMRS in the frequency domain and/or the location of the DMRS in the frequency domain, and the set of values and/or the set of values of /' may indicate the density of the DMRS in the time domain and/or DMRS. In the frequency domain location, the set of values of the PRB may indicate the interval of the DMRS and/or the density of the DMRS in the frequency domain and/or the location of the DMRS in the frequency domain.

In the third embodiment of the DMRS transmission method of the present invention, the DMRS indication message may be a system information block (SIB), a main information block (MIB), a high-level signaling, and a media access. Control (Media Access Control, MAC for short) or cell-specific signaling sent by a set sequence in a cyclic prefix or a set scrambling code in a cyclic prefix. Specifically, the DMRS pattern candidate set of the DMRS antenna port may be predefined, and the DMRS pattern candidate set may include at least one DMRS pattern, for example, may be LTE R10 The DMRS pattern specified in the DMRS pattern or the DMRS pattern specified in the LTE 10 or the DMRS pattern occupied by the newly added DMRS in the embodiment of the present invention is low, and the base station determines the DMRS pattern of the DMRS antenna port from the DMRS pattern candidate set. Transmitting cell-specific signaling to the user equipment by using a set sequence in the SIB, the MIB, the set sequence in the cyclic prefix, or the cyclic prefix, where the cell-specific signaling may be used to indicate the DMRS pattern, and the user equipment receives the After the cell-specific signaling, whether the DMRS pattern is the DMRS pattern specified in the LTE R10 or the DMRS pattern specified in the LTE 10 or the newly added DMRS in the embodiment of the present invention has a lower RE overhead is determined according to the cell-specific signaling. A DMRS pattern of any one of the DMRS patterns, and the base station may send the DMRS to the user equipment according to the DMRS pattern determined by the base station, and the user equipment may acquire the DMRS according to the DMRS pattern indicated by the cell-specific signaling, so that the base station can select the DMRS. The DMRS pattern with a lower RE overhead is sent to the DMRS, and the user equipment can also determine the DMRS pattern with a lower RE overhead occupied by the DMRS. Take DMRS, it is possible to achieve savings of RE. It should be noted that the cell-specific signaling sent by the base station to the user equipment through the SIB, the MIB, the set sequence in the cyclic prefix, or the set scrambling code in the cyclic prefix is consistent with the prior art, and this embodiment does not Let me repeat.

 Optionally, the DMRS indication message (cell-specific signaling in this embodiment) is further used to indicate any one or more of the following information: a maximum modulation order of the received data, and a modulation and coding scheme of the received data (Modulation and Coding Scheme, abbreviated as MCS) table, the maximum modulation order of the transmitted data, the MCS table of the transmitted data, the Channel Quality Indicator (CQI) table, the downlink control area configuration, and the uplink sounding reference signal (Sounding Reference Signal) For example, the SRS configuration table, the Downlink Control Information (DCI) format, and the feedback mode, where the SBS configuration parameters include the SBS period and the subframe offset. The eNB sends the DMRS indication message, which is also used to indicate any one or more of the foregoing information, to the user equipment. Accordingly, the user equipment can obtain any one or more of the information indicated in the DMRS indication message.

The maximum modulation order information of the received data is used to indicate that the user equipment determines the maximum modulation order and/or the maximum modulation scheme used by the PDSCH. For example, the maximum modulation order of the received data may be 6 or 8, and the maximum modulation scheme may be 64. Quadrature Amplitude Modulation (QAM) or 256QAM; modulation coding scheme table information of the received data is used to indicate to the user equipment to determine a modulation coding scheme table used by the PDSCH, for example, may be predefined A plurality of modulation coding scheme tables, the modulation coding scheme table information of the received data is used to indicate that the user equipment uses one of the modulation coding scheme tables.

 The maximum modulation order information of the transmitted data is used to indicate that the user equipment determines the maximum modulation order and/or the maximum modulation scheme used by the PUSCH. For example, the maximum modulation order of the transmitted data may be 4 or 6 or 8, and the maximum modulation scheme may be 16QAM. Or 64QAM or 256QAM; the modulation and coding scheme table information of the transmission data is used to indicate the modulation coding scheme table used by the user equipment to determine the PUSCH, for example, a plurality of modulation and coding scheme tables may be defined in advance, and the modulation and coding scheme table information of the transmission data is used to indicate the user. The device uses one of the modulation coding scheme tables.

 The channel quality indicator table information is used to indicate that the user equipment determines the channel quality indicator table used for measuring the CQI. For example, a plurality of channel quality indicator tables may be defined in advance, and the channel quality indicator table information is used to indicate that the user equipment uses one of the channel quality indicator tables.

 The downlink control area configuration information is used to indicate that the user equipment determines the configuration of the downlink control area, and determines the location of the downlink control area according to the configuration of the downlink control area. For example, the configuration of multiple downlink control areas may be defined in advance, and the configuration information of the downlink control area is used. A configuration indicating that the user equipment uses one of the downlink control areas.

 The table information of the uplink sounding reference signal configuration parameter is used to indicate a table in which the user equipment determines the uplink sounding reference signal configuration parameter, and the user equipment determines, according to the table of the uplink sounding reference signal configuration parameter, the resource for sending the uplink sounding reference signal, for example, multiple predefined A table of uplink sounding reference signal configuration parameters, the table information of the uplink sounding reference signal configuration parameter is used to indicate a table in which the user equipment uses one of the uplink sounding reference signal configuration parameters.

 The downlink control information format and the feedback mode information are used to indicate that the user equipment determines the downlink control information format and the feedback mode, and the user equipment receives the downlink control information according to the downlink control information format and the feedback mode, and performs feedback according to the feedback mode. For example, multiple downlinks may be predefined. The control information format and the feedback mode are used to indicate that the user equipment uses one of the downlink control information formats and the feedback mode.

Specifically, the DMRS indication message includes multiple states, where each state corresponds to a DMRS pattern of the DMRS antenna port, and a modulation coding scheme table and/or a maximum modulation order of the received data and/or a received data. a table of maximum modulation order of the transmitted data and/or a modulation coding scheme table of the transmitted data and/or a channel quality indication table and/or a downlink control region configuration and/or an uplink sounding reference signal configuration parameter and/or Downlink control letter Interest format and feedback mode.

 The following is an example of a DMRS indication message with a 1-bit length. The DMRS indication message has two states, namely, '0' and 'Γ, if the DMRS indication message is further used to indicate the maximum modulation order of the received data and the received data. Modulation coding scheme table and channel quality indication table, and information of each status indication is as shown in Table 1 below.

Figure imgf000042_0001

Figure imgf000042_0003

 The DMRS pattern 1 and the DMRS pattern 2 represent different DMRS patterns, and the downlink MCS table 1 and the downlink MCS table 2 represent different modulation and coding scheme tables for receiving data, and the CQI table 1 and the CQI table 2 represent different channel quality indication tables.

 The following is an example of a DMRS indication message with a length of 2 bits. The DMRS indication message has four states, namely, '00', '01', '10', and '11, if the DMRS indication message is also used to indicate that the data is received. The modulation coding scheme table and the channel quality indication table of the maximum modulation order and the received data, and the information indicated by each state is shown in Table 2.

Figure imgf000042_0002

Figure imgf000042_0004
Since the DMRS indication message also indicates a variety of information, the overhead of signaling can be reduced. Optionally, the DMRS indication message (cell-specific signaling in this embodiment) further includes any one or more of the following information: a maximum modulation order of the received data, a modulation coding scheme table of the received data, and a data transmission a maximum modulation order, an MCS table for transmitting data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, wherein the SRS configuration parameter includes a period and a subframe offset of the SRS shift. The eNB sends the DMRS indication message including any one or more of the foregoing information to the user equipment. Correspondingly, the user equipment can obtain any one or more of the foregoing information included in the DMRS indication message. For related descriptions of any one or more of the foregoing, refer to related descriptions in the foregoing embodiments, and details are not described in this embodiment.

 Further, the eNB may determine the DMRS pattern of the DMRS antenna port according to the cell type corresponding to the base station, for example, the cell type may include a small cell, a mobile cell, and a common cell, and the base station may determine, according to the cell type, the RE overhead occupied by the DMRS according to the cell type. The lower DMRS pattern, the base station may determine the DMRS pattern specified by the LTE R10 or the LTE R11 for the normal cell according to the cell type, and then the base station sends the cell-specific signaling to the user equipment, where the cell-specific signaling includes the corresponding The cell type, correspondingly, after receiving the cell-specific signaling, the user equipment acquires the cell type according to the cell-specific signaling, and then determines the DMRS pattern of the DMRS antenna port according to the cell type, for example: if the cell type is a small cell The user equipment may determine that the DMRS pattern is a DMRS pattern that determines that the RE overhead of the DMRS is low. If the cell type is a normal cell, the user equipment may determine that the DMRS pattern is a DMRS pattern specified by the LTE R10 or the LTE R11.

 Optionally, the cell type may also be used to determine any one or more of the following information: a maximum modulation order of the received data, an MCS table of the received data, a maximum modulation order of the transmitted data, an MCS table of the transmitted data, and a channel. a quality indication CQI table, a downlink control region configuration, a table of uplink sounding reference signal SRS configuration parameters, a downlink control information DCI format, and a feedback mode, where the SRS configuration parameter includes a period of the SRS and a subframe offset. Different cell types may determine content in any one or more of the foregoing information, and the base station sends the cell-specific signaling including the cell type to the user equipment, and accordingly, the user equipment may acquire the cell-specific signaling. The cell type can also determine any one or more of the above information according to the cell type. For the specific process of the cell type for determining any one or more kinds of information, refer to the related description of the implementation process of the DMRS indication message in the foregoing embodiment, which is not described herein. .

In the fourth embodiment of the DMRS transmission method of the present invention, the DMRS indication message may be passed by the base station. User equipment-specific signaling sent by higher layer signaling or MAC signaling. Specifically, the DMRS pattern candidate set of the DMRS antenna port may be defined in advance, and the DMRS pattern candidate set may include at least one DMRS pattern, for example, may be a DMRS pattern specified in LTE R10 or a DMRS pattern specified in LTE 10 or the embodiment of the present invention The newly added DMRS occupies at least one DMRS pattern with lower RE overhead, and the base station transmits the DMRS pattern of the DMRS antenna port from the DMRS pattern candidate set, and then sends the cell to the user equipment through high layer signaling or MAC signaling. The user equipment-specific signaling may be used to indicate a DMRS pattern. After receiving the user equipment-specific signaling, the user equipment may determine, according to the user equipment-specific signaling, that the DMRS pattern is a DMRS pattern specified in LTE R10. Or the DMRS pattern specified in the LTE 10 is also any one of the at least one DMRS pattern in which the DMRS occupied by the newly added DMRS in the embodiment of the present invention has a low RE overhead, and the base station can send the DMRS pattern to the user equipment according to the DMRS pattern determined by the base station. DMRS, the user equipment can acquire the DMRS according to the DMRS pattern indicated by the user equipment dedicated signaling, so that the base station can Optional low cost DMRS RE occupied DMRS pattern transmitted DMRS, accordingly the user equipment may determine a lower cost DMRS RE occupied DMRS DMRS pattern acquired, it is possible to achieve the purpose of saving the RE. It should be noted that the user equipment-specific signaling that is sent by the base station to the user equipment through the high-layer signaling or the medium access control MAC signaling is consistent with the prior art, and details are not described herein again.

 Optionally, the DMRS indication message (in this embodiment, the user equipment-specific signaling) is further used to indicate any one or more of the following information: a maximum modulation order of the received data, an MCS table of the received data, and a sending data. The maximum modulation order, the MCS table of the transmitted data, the channel quality indication CQI table, the downlink control region configuration, the table of the uplink sounding reference signal SRS configuration parameters, the downlink control information DCI format, and the feedback mode, wherein the SRS configuration parameter includes the SRS Period and subframe offset. The base station also sends a DMRS indication message for indicating any one or more of the above information to the user equipment. Accordingly, the user equipment can acquire any one or more of the information indicated in the DMRS indication message. For the implementation process of the DMRS indication message indicating any one or more kinds of information, refer to the related description in the foregoing embodiment, and details are not described herein again.

Optionally, the DMRS indication message (in this embodiment, the user equipment-specific signaling) further includes any one or more of the following information: a maximum modulation order of the received data, an MCS table of the received data, and a maximum of the sent data. Modulation order, MCS table for transmitting data, channel quality indication CQI table, downlink control region configuration, table of uplink sounding reference signal SRS configuration parameters, downlink control information The DCI format and the feedback mode, wherein the SRS configuration parameter includes a period of the SRS and a subframe offset. The eNB sends the DMRS indication message including any one or more of the foregoing information to the user equipment. Correspondingly, the user equipment can obtain any one or more of the foregoing information included in the DMRS indication message. For related descriptions of any one or more of the foregoing, refer to related descriptions in the foregoing embodiments, and details are not described in this embodiment.

 Further, the base station can determine the DMRS pattern of the DMRS antenna port according to the transmission mode of the PDSCH. For example, the base station can pre-define the correspondence between the transmission mode of the PDSCH and the DMRS pattern of the DMRS antenna port. According to the correspondence, the base station can determine different The DMRS pattern corresponding to the transmission mode of the PDSCH, and then the base station sends the user equipment-specific signaling to the user equipment, where the user equipment-specific signaling includes the transmission mode of the PDSCH, and then the base station sends the user equipment-specific information to the user equipment. Therefore, the user equipment-specific signaling includes a transmission mode of the PDSCH, and correspondingly, after receiving the user equipment-specific signaling, the user equipment acquires a transmission mode of the PDSCH according to the user equipment-specific signaling, and the user equipment may also The mapping relationship between the transmission mode of the PDSCH and the DMRS pattern is defined in advance, and then the user equipment can determine the DMRS pattern of the DMRS antenna port according to the transmission mode of the PDSCH and the corresponding relationship.

 Optionally, the transmission mode of the PDSCH may also be used to determine a group of any one or more of the following: a maximum modulation order of the received data, an MCS table of the received data, a maximum modulation order of the transmitted data, and a data transmission The MCS table, the channel quality indication CQI table, the downlink control region configuration, the table of the uplink sounding reference signal SRS configuration parameters, the downlink control information DCI format, and the feedback mode, wherein the SRS configuration parameter includes a period and a subframe offset of the SRS. The transmission mode of the different PDSCH may determine the content of any one or more of the foregoing information, and the base station sends the user equipment specific signaling including the transmission mode of the PDSCH to the user equipment, and accordingly, the user equipment may acquire the user equipment. The transmission mode of the PDSCH in the proprietary signaling may also determine any one or more of the above information according to the transmission mode of the PDSCH. For the specific process of determining the foregoing one or more types of information, the DMRS indication message in the foregoing embodiment indicates the related description of the implementation process of any one or more types of information. Let me repeat.

In the fifth embodiment of the DMRS transmission method of the present invention, the DMRS indication message may be dynamic signaling that is sent by the base station through the PDCCH or the EPDCCH, and the dynamic signaling includes any one or more of the following information: N-bit signaling, indicating redundancy Version signaling, signaling indicating modulation coding scheme, signaling indicating the number of antenna ports, scrambling code sequence and layer number, new transmission data indicating signaling, and N is a natural number. Specific The DMRS pattern candidate set of the DMRS antenna port may be predefined, and the DMRS pattern candidate set may include at least one DMRS pattern, for example, may be a DMRS pattern specified in LTE R10 or a DMRS pattern specified in LTE 10 or a new embodiment of the present invention The DMRS pattern of the DMRS antenna port is determined by the DMRS, and the base station sends the foregoing dynamic information to the user equipment by using the PDCCH or the EPDCCH, where the dynamic signaling is sent by the PDCCH or the EPDCCH. The DMRS pattern can be used to indicate the DMRS pattern. After receiving the dynamic signaling, the user equipment can determine whether the DMRS pattern is the DMRS pattern specified in the LTE R10 or the DMRS pattern specified in the LTE 10 or the newly added DMRS in the embodiment of the present invention. A DMRS pattern of any one of the at least one DMRS pattern with a lower RE overhead, and the base station may send the DMRS to the user equipment according to the DMRS pattern determined by the base station, and the user equipment may acquire the DMRS according to the DMRS pattern indicated by the dynamic signaling. Therefore, the base station can select the DMRS pattern of the DMRS that is occupied by the DMRS to transmit the DMRS. Correspondingly, the user equipment can also determine the DMRS pattern of the DMRS that is occupied by the DMRS and obtain the DMRS, so that the RE can be saved. It should be noted that the dynamic signaling sent by the base station to the user equipment by using the PDCCH or the EPDCCH is consistent with the prior art, and is not described herein again in this embodiment.

 Specifically, in this embodiment, the user equipment may determine the DMRS pattern according to the N-bit signaling in the dynamic signaling, for example, when the N-bit signaling is equal to the first preset value, the user equipment may determine that the DMRS pattern is occupied by the DMRS. The DMRS pattern with lower RE overhead, when the N-bit signaling is equal to the second preset value, the user equipment may determine that the DMRS pattern is a DMRS pattern specified in LTE R10 or LTE R11.

 In this embodiment, the user equipment may determine the DMRS pattern according to the signaling indicating the redundancy version in the dynamic signaling, for example, when the redundancy version is indicated to be equal to the third preset value, the user equipment may determine that the DMRS pattern is occupied by the DMRS. The DMRS pattern with a lower RE overhead, when the indicated redundancy version is equal to the fourth preset value, the user equipment may determine that the DMRS pattern is a DMRS pattern specified in LTE R10 or LTE R11.

 In this embodiment, the user equipment may determine the DMRS pattern according to the signaling indicating the MCS, for example, when the MCS belongs to the first preset range, the user equipment may determine that the DMRS pattern is a DMRS pattern with a lower RE overhead occupied by the DMRS, when the MCS When the second preset range is reached, the user equipment may determine that the DMRS pattern is a DMRS pattern specified in LTE R10 or LTE R11.

In this embodiment, the user equipment can be determined according to an instruction indicating an antenna port, a scrambling code sequence, and a layer number. The DMRS pattern is determined, for example, when the number of layers belongs to the third preset range, the user equipment may determine that the DMRS pattern is a DMRS pattern with a lower RE overhead occupied by the DMRS, and when the number of layers belongs to the fourth preset range, the user equipment It can be determined that the DMRS pattern is a DMRS pattern specified in LTE R10 or LTE R11.

 In this embodiment, the user equipment may determine, according to the new transmission data indication signaling in the dynamic signaling.

DMRS pattern, for example: when the new transmission data indicates that the signaling is equal to the fifth preset value, the user equipment may determine that the DMRS pattern is a DMRS pattern with a lower RE overhead occupied by the DMRS, and the new transmission data indicates that the signaling is equal to the sixth pre- When the value is set, the user equipment can determine that the DMRS pattern is the DMRS pattern specified in LTE R10 or LTE R11. In this embodiment, the user equipment may determine the DMRS pattern according to the new transmission data indication signaling in the dynamic signaling, and specifically, when the new transmission data indication signaling indicates that the data is not newly transmitted or indicated as retransmitted data, The user equipment determines that the DMRS exists in a subframe in which the dynamic signaling is located or a subframe indicated by the dynamic signaling.

 In the sixth embodiment of the DMRS transmission method of the present invention, the DMRS indication message is downlink control information that is sent by the base station through the PDCCH. Specifically, the DMRS pattern candidate set of the DMRS antenna port may be defined in advance, and the DMRS pattern candidate set may include at least one DMRS pattern, for example, may be a DMRS pattern specified in LTE R10 or a DMRS pattern specified in LTE 10 or the embodiment of the present invention The newly added DMRS occupies at least one DMRS pattern with a lower RE overhead. After determining the DMRS pattern of the DMRS antenna port from the DMRS pattern candidate set, the base station sends downlink control information through the PDCCH, where the downlink control information can be used to indicate the DMRS. a mode, after the user equipment receives the downlink control information, in a first feasible implementation manner, the user equipment may, according to the downlink control information, a subframe number of a subframe in which the downlink control information is located; In the mode, the user equipment may determine the subframe number of the subframe indicated by the downlink control information according to the downlink control information. The user equipment may also pre-define the correspondence between the subframe number and the DMRS pattern, and then the user equipment may use the subframe number according to the subframe number. , determine the DMR of the DMRS antenna port S pattern. For example, when the subframe number is an even number, the user equipment may determine that the DMRS pattern is a DMRS pattern with a lower RE overhead occupied by the DMRS. When the subframe number is an odd number, the user equipment may determine that the DMRS pattern is LTE R10 or LTE R1. The DMRS pattern specified in 1.

Further, in the first feasible implementation manner, after the user equipment determines the subframe number where the downlink control information is located, the user equipment may determine the subframe of the subframe where the current downlink control information is located. Whether the difference between the number and the subframe number of the subframe in which the previous downlink control information is located is greater than a preset value of the first number difference. If the value is greater than, the user equipment may determine that the DMRS exists in the subframe where the current downlink control information is located; If the value is greater than, the user equipment may determine that the DMRS does not exist in the subframe where the current downlink control information is located. In a second possible implementation manner, after the user equipment determines the subframe number of the subframe indicated by the downlink control information, the user equipment may determine the subframe number of the subframe indicated by the current downlink control information and the previous downlink control information. Whether the difference between the subframe number of the subframe is greater than the preset value of the second number difference. If the value is greater than, the user equipment determines that the DMRS exists in the subframe indicated by the current downlink control information; if not, the user equipment determines the current There is no DMRS in the subframe indicated by the downlink control information.

 On the basis of the foregoing embodiments of the present invention, after the base station determines the DMRS pattern of the DMRS antenna port, the base station may further perform resource mapping of the PDSCH and/or the EPDCCH and the RE according to the determined DMRS pattern. Specifically, the base station may perform according to the The determined DMRS pattern determines an RE that is resource mapped with the DMRS, and the base station maps the PDSCH and/or the EPDCCH to the RE that is not mapped with the DMRS, and performs resource mapping between the RE that does not perform resource mapping with the DMRS and the PDSCH and/or the EPDCCH. Then, the base station sends the PDSCH and/or the EPDCCH to the user equipment. It is to be noted that the resource mapping process of the PDSCH and/or the EPDCCH and the RE according to the DMRS pattern is consistent with the prior art in the DMRS pattern. .

Correspondingly, the user equipment may further obtain a mapping relationship between the PDSCH and/or the EPDCCH and the RE according to the DMRS pattern, and obtain the PDSCH and/or the EPDCCH according to the mapping relationship; the user equipment may determine, according to the DMRS pattern, the RE mapped with the DMRS, The user equipment acquires the PDSCH and/or the EPDCCH on the RE that does not perform resource mapping with the DMRS, that is, does not perform the operation of acquiring the PDSCH and/or the EPDCCH on the RE occupied by the DMRS, and after the user equipment acquires the PDSCH and/or the EPDCCH, the user equipment The PDSCH and/or the EPDCCH may be demodulated according to the DMRS. The process of demodulating the PDSCH and/or the EPDCCH according to the DMRS may include the user equipment measuring the downlink channel according to the acquired DMRS, and the user equipment demodulating the PDSCH according to the measured downlink channel. The specific implementation process is the same as that in the prior art, and details are not described herein again. After the user equipment obtains the DMRS according to the DMRS pattern of the DMRS antenna port, the user equipment may perform the CQI calculation according to the DMRS. The process of performing the CQI calculation according to the DMRS is consistent with the prior art, and is not described herein again in this embodiment. . It should be noted that the user equipment performs the DMRS pattern according to the DMRS antenna port, acquires the PDSCH and The mapping between the EPDCCH and the resource element, and the step of acquiring the PDSCH and/or the EPDCCH according to the mapping relationship may be performed after the step 102 is performed, and the embodiment is not limited herein.

 Further, based on the foregoing embodiments of the present invention, the base station may further determine an additional DMRS pattern of the DMRS antenna port, where the additional DMRS pattern is a location of a time-frequency resource with zero-power DMRS and/or the zero-power DMRS The location of the occupied resource element in the time-frequency resource, the DMRS indication message sent by the base station to the UE is further used to indicate an additional DMRS pattern of the DMRS antenna port, so that the UE determines the addition of the DMRS antenna port according to the DMRS indication message. a DMRS pattern, or the base station sends an additional DMRS indication message to the UE, where the additional DMRS indication message is used to indicate an additional DMRS pattern of the DMRS antenna port, so that the UE determines an additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message, and the base station may also Performing resource mapping of the PDSCH and/or the EPDCCH and the RE according to the determined DMRS pattern and/or the additional DMRS pattern. Specifically, the base station may determine, according to the determined DMRS pattern, the RE mapped with the DMRS and the additional DMRS according to the determined The pattern determines the RE mapping of the resource mapping with the zero-power DMRS Mapping the PDSCH and/or the EPDCCH to the REs that are not resource mapped with the DMRS and the zero-power DMRS, and the resources that are not mapped with the DMRS and the zero-power DMRS are mapped with the PDSCH and/or the EPDCCH, and then the base station will PDSCH and / or EPDCCH is sent to the user equipment. The zero-power DMRS means that the base station can send a zero-power signal on the RE that maps the zero-power DMRS; or the base station can determine the RE mapped with the zero-power DMRS according to the determined additional DMRS pattern, and the base station uses the PDSCH and And the EPDCCH is mapped to the RE that is not resource mapped with the zero-power DMRS, and the RE that does not perform resource mapping with the zero-power DMRS performs resource mapping with the PDSCH and/or the EPDCCH, and then the base station sends the PDSCH and/or the EPDCCH to the user equipment. . It should be noted that, in this embodiment, there is no limitation on the order in which the base station performs the additional DMRS pattern for determining the DMRS antenna port and the steps 201 to 203 are performed.

Correspondingly, the user equipment further determines an additional DMRS pattern of the DMRS antenna port according to the DMRS indication message, or the user equipment receives an additional DMRS indication message sent by the base station, and determines an additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message, Obtaining, by the user equipment, a mapping relationship between the PDSCH and/or the EPDCCH and the RE according to the DMRS pattern and/or the additional DMRS pattern, and acquiring the PDSCH and/or the EPDCCH according to the mapping relationship; The user equipment may determine an RE that performs resource mapping with the DMRS according to the DMRS pattern and an RE that performs resource mapping with the zero-power DMRS according to the additional DMRS pattern, and the user equipment acquires the PDSCH and/or on the RE that does not perform resource mapping with the DMRS and the zero-power DMRS. Or EPDCCH, that is, the PDSCH and/or EPDCCH operation is not performed on the REs occupied by the DMRS and the zero-power DMRS, after the user equipment acquires the PDSCH and/or the EPDCCH, the user equipment may demodulate the PDSCH and/or the EPDCCH according to the DMRS; or The user equipment may determine, according to the additional DMRS pattern, an RE that is resource mapped with the zero-power DMRS, and the user equipment acquires the PDSCH and/or the EPDCCH on the RE that does not perform resource mapping with the zero-power DMRS, that is, on the RE occupied by the zero-power DMRS. Performing the acquisition of the PDSCH and/or the EPDCCH, after the user equipment acquires the PDSCH and/or the EPDCCH, the user equipment may demodulate the PDSCH and/or the EPDCCH according to the DMRS. The zero-power DMRS refers to a user setting to transmit a zero-power signal on an RE that maps a zero-power DMRS. It should be noted that, if the user equipment determines the additional DMRS pattern according to the DMRS indication message, the user equipment may perform the step of determining an additional DMRS pattern of the DMRS antenna port after performing step 101; if the user equipment indicates according to the additional DMRS When the message determines the additional DMRS pattern, the order in which the embodiment performs the determination of the additional DMRS pattern of the DMRS antenna port for the user equipment and the sequence between steps 201 to 203 are not limited.

 The method for determining, by the user equipment, the DMRS pattern of the DMRS antenna port and the additional DMRS pattern of the DMRS antenna port according to the DMRS indication message, the DMRS indication information includes multiple states, where each state corresponds to one DMRS antenna port. The DMRS pattern and an additional DMRS pattern of the DMRS antenna port, the user equipment determines the DMRS pattern of the DMRS antenna port and the attached port DMRS pattern of the DMRS antenna port according to the status of the received DMRS indication information.

 The following is an example of a DMRS indication message with a length of 1 bit. The DMRS indication message has two states, namely, '0, and 'Γ. The information indicated by each state is as shown in Table 3 below.

 Table 3

Figure imgf000050_0001

Wherein DMRS pattern 1 and DMRS pattern 2 represent different DMRS patterns, and additional DMRS pattern 1 and additional DMRS pattern 2 represent different additional DMRS patterns. The following is an example of a DMRS indication message with a length of 2 bits. The DMRS indication message has four states, namely, '00,, '01', '10, and '11, and the information indicated by each state is shown in Table 4. .

 Table 4

Figure imgf000051_0001

 The method for determining, by the user equipment, the additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message is consistent with the method for determining, by the user equipment, the DMRS pattern of the DMRS antenna port according to the DMRS indication message, in this embodiment. I will not repeat them here.

 Since the base station can transmit the zero-power signal on the RE indicated by the additional DMRS pattern, the DMRS is not interfered with other base stations or user equipments on the RE indicated by the additional DMRS pattern, so the DMRS can be used for other base stations or user equipments. The interference improves the DMRS transmission performance of other base stations or user equipments, improves the accuracy of channel estimation by the user equipment according to the DMRS, and further improves the throughput of the user equipment.

Further, the base station may acquire the DMRS pattern supported by the user equipment. In the first feasible implementation manner, before the user equipment receives the DMRS indication message sent by the base station, the user equipment may select at least one DMRS pattern from the DMRS pattern candidate set, and Sending the selected at least one DMRS pattern to the base station by using a high-level signaling or a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH), where the DMRS pattern is transmitted. The candidate set may include all of the DMRS patterns supported in the communication system. Correspondingly, before the base station determines the DMRS pattern of the DMRS antenna port, the base station may receive at least one DMRS pattern sent by the user equipment by using the high layer signaling or the PUCCH or the PUSCH, where the at least one DMRS pattern is selected by the user equipment from the DMRS pattern candidate set. Therefore, the base station can determine the DMRS pattern of the DMRS antenna port according to the received at least one DMRS pattern. Specifically, the base station can determine the DMRS pattern of the DMRS antenna port from the received at least one DMRS pattern sent by the user equipment, and then The user equipment sends a DMRS indication message, so that the user equipment can be implemented. Obtaining a DMRS by using the DMRS pattern selected by the DMRS; or the DMRS pattern of the DMRS antenna port determined by the base station may be determined by the base station from the DMRS pattern candidate set except the at least one DMRS pattern. The pattern is closer to a density of the DMRS indicated by the at least one DMRS pattern and/or a location of a time-frequency resource in which the DMRS exists and/or a location of a resource element occupied by the DMRS in the time-frequency resource.

 Further, the user equipment selecting at least one DMRS pattern from the DMRS pattern candidate set may include: the user equipment selecting at least one DMRS from the DMRS pattern candidate set according to the moving speed of the user equipment or the downlink channel information or the DMRS processing capability of the user equipment. pattern.

 For example, the user equipment may select a DMRS pattern according to the moving speed of the user equipment. If the moving speed of the user equipment is less than the first moving speed threshold, the moving speed of the user equipment is low, and the required DMRS is small, and the user equipment may be from the DMRS. The DMRS pattern with a lower RE overhead occupied by the DMRS is selected in the pattern candidate set; if the moving speed of the user equipment is greater than the second moving speed threshold, the moving speed of the user equipment is faster, and the required DMRS is more, the user equipment may The DMRS pattern specified in LTE R10 or LTE R11 is selected from the DMRS pattern candidate set.

 The user equipment may select at least one DMRS pattern according to the downlink channel information. If the multipath delay spread of the downlink channel is smaller than the first multipath delay extension threshold, the frequency domain correlation of the downlink channel is higher, and the required DMRS is less. The user equipment may select a DMRS pattern with a lower RE overhead occupied by the DMRS from the DMRS pattern candidate set; if the multipath delay spread of the downlink channel is greater than the first multipath delay extension threshold, the frequency domain correlation of the downlink channel is illustrated. The DMRS is less, and the required DMRS is less. The user equipment can select the DMRS pattern specified in LTE R10 or LTE R1 1 from the DMRS pattern candidate set.

The user equipment may select at least one DMRS pattern from the DMRS pattern candidate set according to the DMRS processing capability of the user equipment. Since the DMRS processing capability of each user equipment may be different, the DMRS patterns that can be supported by each user equipment may also be different, so the user The device selects at least one DMRS pattern that the user equipment can support from the DMRS pattern candidate set according to the DMRS processing capability of the user equipment. Correspondingly, the at least one DMRS pattern sent by the base station to the user equipment may be selected by the user equipment from the DMRS pattern candidate set according to the moving speed or downlink channel information of the user equipment or the DMRS processing capability of the user equipment. The user equipment may also select a DMRS pattern candidate set according to a rank indicator (referred to as RI). At least one DMRS pattern.

 Further, the user equipment sends the at least one DMRS pattern to the base station by using the high layer signaling or the PUCCH or the PUSCH, and the method includes: the user equipment sends the at least one DMRS pattern and the rank indication together to the base station by using the high layer signaling or the PUCCH or the PUSCH. Correspondingly, the base station can receive the rank indication and the at least one DMRS pattern sent by the user equipment by using the high layer signaling or the physical uplink control channel or the physical uplink shared channel, so that the change interval of the DMRS pattern selected by the user equipment cannot be less than the change of the RI. The time interval ensures that the base station can determine the DMRS pattern from the valid DMRS patterns selected by the user equipment. Further, the user equipment sends the RI and the at least one DMRS pattern to the base station by using the high layer signaling or the PUCCH or the PUSCH, and the method includes: the user equipment jointly encodes the at least one DMRS pattern and the RI; the user equipment shall jointly encode the at least one The DMRS pattern and rank indication are transmitted to the base station through higher layer signaling or PUCCH or PUSCH. Correspondingly, the base station receives the jointly encoded RI and the at least one DMRS pattern sent by the user equipment by using the high layer signaling or the PUCCH or the PUSCH, and then acquiring at least one selected by the user equipment from the jointly encoded RI and the at least one DMRS pattern. DMRS pattern.

 In a second possible implementation, before the user equipment receives the DMRS indication message sent by the base station, the user equipment may report the DMRS processing capability indication information to the base station, where the DMRS processing indication information includes the DMRS processing capability indicating the user equipment. The DMRS processing can be pre-defined to correspond to the number of DMRS patterns and/or the DMRS pattern. Therefore, before the base station determines the DMRS pattern of the DMRS antenna port, the base station can receive the DMRS processing capability indication message reported by the user equipment, and learn the user equipment. The DMRS processing capability, according to the correspondence between the DMRS processing capability and the number of DMRS patterns and/or the DMRS pattern, may determine the number of DMRS patterns that the user equipment can process and/or the DMRS pattern that the user equipment can process, so that the base station can be the user. Determining a DMRS pattern of the DMRS antenna port in the at least one DMRS pattern that the device can process, and then sending a DMRS indication message to the user equipment, so that the user equipment can obtain the DMRS by using the DMRS pattern that can be processed by the user equipment.

On the basis of the above embodiments of the present invention, since the DMRS antenna end can correspond to different devices, different user devices can process different DMRS patterns. Therefore, the DMRS antenna port has at least two different DMRS patterns. These DMRS patterns may be referred to as candidate DMRS patterns of DMRS antenna ports, and therefore, if at least two candidate DMRS patterns of the DMRS antenna port have overlapping REs in the same time-frequency resource, according to at least two candidates The DMRS pattern maps the same DMRS on the REs overlapped in the same time-frequency resource, so that overlapping REs in the at least two candidate DMRS patterns can be orthogonally coded.

 Taking one subframe as an example, one subframe includes two slots, and each slot is half a subframe. The position of the RE occupied by the DMRS in the slot can be represented by a representation ( , /). Where is the subcarrier number in the slot, and / is the number of the OFDM symbol in the slot.

 The value can be determined by the formula (1):

Figure imgf000054_0001

Wherein, the number of subcarriers included in one RB, for example, ^^ = 12 , "PRB is the number of the RB," the value range of the PRB is {0, N^' DL -l}, Λ^Γ'^ is a The maximum number of RBs in the time slot, which is the first coefficient, '=012;

 ' is the second coefficient, which is the DMRS antenna port number.

Figure imgf000054_0002

 The value of 1 can be determined by formula (2):

 / = /'mod2 + 5 (2)

Γ is the third coefficient, ^ ' 1 lf 3⁄4 mod2 = 0 , where is the time slot number, mod represents the modulus

[2,3 if n s mod 2 = 1

The remainder of the operation.

Different DMRS patterns can be distinguished by different sets of values of m' and/or " PRB and/or n s and/or /'.

 The DMRS antenna port p DMRS symbol transmitted on the RE of position (k, /) can be expressed by equation (3):

Figure imgf000054_0003
Among them, for the RS symbol, P
Figure imgf000054_0004
, r () is a pseudo-random sequence, ( 0 is a predefined orthogonal code, where ' {01 23 }

For different DMRS patterns, the DMRS symbols transmitted on the same 'n PRB , /' corresponding RE are also the same.

FIG. 7 is a schematic structural diagram of Embodiment 1 of a user equipment according to the present invention. As shown in FIG. 7, the apparatus in this embodiment may include: a receiving module 11, a determining module 12, and an obtaining module 13, where the receiving module 11 is configured to receive a base station and send a DMRS indication message, where the DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port, where the DMRS pattern is a time-frequency resource in which a DMRS exists Location and/or location of resource elements occupied by the DMRS in time-frequency resources;

 The determining module 12 is configured to determine a DMRS pattern of the DMRS antenna port according to the DMRS indication message received by the receiving module 11;

 The obtaining module 13 is configured to acquire the DMRS according to the DMRS pattern of the DMRS antenna port determined by the determining module 12.

 The user equipment in this embodiment may be used to perform the technical solution of the method embodiment shown in FIG. 2, and the implementation principle and the technical effect are similar. For details, refer to related descriptions in the foregoing embodiments, and details are not described herein again.

 FIG. 8 is a schematic structural diagram of Embodiment 2 of a user equipment according to the present invention. As shown in FIG. 8, the user equipment in this embodiment is based on the structure of the user equipment shown in FIG. 7. Further, the receiving module 11 is specifically configured to receive the foregoing. a DMRS indication message sent by the base station, where the DMRS indication message is used to indicate a DMRS pattern of the at least one DMRS antenna port; or, at least two DMRS indication messages sent by the base station are received, where each DMRS indication message is used to indicate one DMRS pattern of the DMRS antenna port. The DMRS indication message received by the receiving module 11 is used to indicate the DMRS pattern of the DMRS antenna port, and the method includes: the DMRS indication message is used to indicate the density of the DMRS, the interval of the DMRS, the bitmap encoding of the DMRS, and/or the absence of the DMRS. The location of the time-frequency resource, where the density of the DMRS, the interval of the DMRS, the bitmap encoding of the DMRS, and/or the location of the time-frequency resource in which the DMRS does not exist is used to determine the DMRS pattern of the DMRS antenna port .

 Optionally, the DMRS indication message received by the receiving module 11 is further used to indicate any one or more of the following information: a maximum modulation order of the received data, a modulation coding scheme table of the received data, and a maximum modulation order of the transmitted data. a number, a modulation coding scheme table for transmitting data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, wherein the sounding reference signal configuration parameter includes a period of the sounding reference signal And subframe offset.

 In a first feasible implementation manner, the DMRS indication message received by the receiving module 11 is set by the base station by using a system information block, a main message block, a high layer signaling, a media access control signaling, and a cyclic prefix. The cell-specific signaling sent by the scrambling code in the sequence or cyclic prefix.

Further, the cell-specific signaling received by the receiving module u includes the cell type corresponding to the base station, and the determining module 12 is specifically configured to use the cell-specific signaling received by the receiving module 11 Obtaining a cell type; and determining a DMRS pattern of the DMRS antenna port according to the cell type. Optionally, the determining module 12 is further configured to determine, according to the cell type, any one or more of the following information: a maximum modulation order of the received data, a modulation and coding scheme table of the received data, and a maximum modulation order of the transmitted data. a modulation coding scheme table for transmitting data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, wherein the sounding reference signal configuration parameter includes a period and a sub-detection reference signal Frame offset.

 In a second possible implementation manner, the DMRS indication message received by the receiving module 11 is user equipment specific signaling sent by the base station by using high layer signaling or medium access control signaling.

 Further, the user equipment-specific signaling received by the receiving module u includes a transmission mode of the physical downlink shared channel (PDSCH), and the determining module 12 is specifically configured to acquire, according to the user equipment-specific signaling received by the receiving module 11, a transmission mode of the PDSCH; and determining a DMRS pattern of the DMRS antenna port according to a transmission mode of the PDSCH. Optionally, the determining module 12 is further configured to determine any one or more of the following information according to the transmission mode of the PDSCH: a maximum modulation order of the received data, a modulation coding scheme table of the received data, and a maximum modulation of the transmitted data. An order, a modulation and coding scheme table for transmitting data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, wherein the sounding reference signal configuration parameter includes a sounding reference signal Period and subframe offset.

 In a third possible implementation, the DMRS indication message received by the receiving module 11 is dynamic signaling that is sent by the base station by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel (EPDCCH), where the dynamic signaling includes Any one or more of the following information: N-bit signaling, signaling indicating a redundancy version, signaling indicating a modulation coding scheme, signaling indicating the number of antenna ports, scrambling code sequence and layer number, new data indication Signaling, the N is a natural number; the determining module 12 is specifically configured to determine a DMRS pattern of the DMRS antenna port according to the dynamic signaling received by the receiving module 11.

In a fourth possible implementation manner, the DMRS indication message received by the receiving module 11 is downlink control information that is sent by the base station by using a physical downlink control channel, and the determining module 12 is specifically configured to receive the downlink according to the receiving module 11 Determining, by the control information, a subframe number of the subframe in which the downlink control information is located, or determining, according to the downlink control information received by the receiving module 11, a subframe number of the subframe indicated by the downlink control information; The subframe number determines a DMRS pattern of the DMRS antenna port. Further, the determining module 12 is specifically configured to: Determining whether the difference between the subframe number of the subframe in which the current downlink control information is located and the subframe number of the subframe in which the previous downlink control information is located is greater than a preset value of the first number difference.

The position of the time-frequency resource of the DMRS is the subframe in which the current downlink control information is located; or, the difference between the subframe number of the subframe indicated by the current downlink control information and the subframe number of the subframe in which the previous downlink control information is located is determined. If the preset value is greater than the second number difference, the location of the time-frequency resource in which the DMRS exists is determined to be the subframe indicated by the current downlink control information.

 Further, the time-frequency resource includes: a resource block pair, a resource block group, a half subframe, a subframe, a subframe group, or a resource block group on the subframe group. All of the M time-frequency resources are allocated to the resource blocks of the user equipment using the same pre-coding, and the M is a natural number.

 Further, in the first feasible implementation manner, the user equipment in this embodiment may further include a first processing module 14, where the first processing module 14 is configured to obtain the PDSCH according to the DMRS pattern determined by the determining module. And a mapping relationship between the EPDCCH and the resource element; acquiring the PDSCH and/or the EPDCCH according to the mapping relationship; demodulating the PDSCH and/or the EPDCCH according to the DMRS acquired by the obtaining module 13; or, the first processing The module 14 is configured to perform channel quality indication calculation according to the DMRS acquired by the obtaining module 13.

 In a second possible implementation manner, the user equipment in this embodiment may further include a second processing module 15, where the determining module 12 is further configured to determine an additional DMRS pattern of the DMRS antenna port, where the additional DMRS pattern is zero. The location of the time-frequency resource of the power DMRS and/or the location of the resource element occupied by the zero-power DMRS in the time-frequency resource; the second processing module 15 is configured to determine the DMRS antenna port according to the determining module 12 Obtaining a mapping relationship between a PDSCH and/or an EPDCCH and a resource element according to the DMRS pattern and/or an additional DMRS pattern; acquiring the PDSCH and/or EPDCCH according to the mapping relationship; demodulating the PDSCH and/or the EPDCCH according to the DMRS . Further, the determining module 12 is specifically configured to: before the second processing module 15 acquires a mapping relationship between the PDSCH and/or the EPDCCH and the resource element according to the DMRS pattern and/or the additional DMRS pattern of the DMRS antenna port, according to the DMRS indication Determining an additional DMRS pattern of the DMRS antenna port; or

 The receiving module 11 is further configured to: before the second processing module 15 acquires a mapping relationship between the PDSCH and/or the EPDCCH and the resource element according to the DMRS pattern of the DMRS antenna port and/or the additional DMRS pattern, receive the additional DMRS sent by the base station. Indication message

The determining module 12 is specifically configured to determine the DMRS day according to the additional DMRS indication message. An additional DMRS pattern for the line port.

 Further, in the first feasible implementation manner, the user equipment in this embodiment may further include: a selecting module 16 and a first sending module 17, where the selecting module 16 is configured to receive, by the receiving module 11, the DMRS sent by the base station. Before the indication message, at least one DMRS pattern is selected from the DMRS pattern candidate set; the first sending module 17 is configured to pass the at least one DMRS pattern selected by the selection module 16 through the high layer signaling or the physical uplink control channel PUCCH or the physical uplink shared channel. The PUSCH is sent to the base station, so that the base station determines a DMRS pattern of the DMRS antenna port according to the at least one DMRS pattern. Further, the selecting module 16 is specifically configured to select the at least one DMRS pattern from the DMRS pattern candidate set according to the moving speed or downlink channel information of the user equipment or the DMRS processing capability of the user equipment. The first sending module 17 is specifically configured to send the rank indication together with the at least one DMRS pattern to the base station by using the high layer signaling or PUCCH or PUSCH. Preferably, the apparatus in this embodiment may further include a third processing module 18, configured to jointly encode the rank indication and the at least one DMRS pattern; the first sending module 17 is specifically configured to jointly code The subsequent rank indication and the at least one DMRS pattern are transmitted to the base station through the higher layer signaling or PUCCH or PUSCH.

 In a second possible implementation manner, the user equipment in this embodiment may include a second sending module 19, where the second sending module 19 is configured to report the DMRS indication message sent by the base station to the base station before receiving the DMRS indication message sent by the base station. The DMRS processing capability indication information is used to enable the base station to determine, according to the DMRS processing capability indication message, the number of DMRS patterns that the user equipment can process and/or the DMRS pattern that the user equipment can process.

 The user equipment in this embodiment may be used to perform the technical solution of the user equipment in the foregoing embodiment of the present invention. The implementation principle and the technical effect are similar. For details, refer to related descriptions in the foregoing embodiments, and details are not described herein again.

It should be noted that, in hardware implementation, the foregoing receiving module 11 may be a receiver or a transceiver, and the foregoing first sending module 17 and second sending module 19 may be a transmitter or a transceiver, and the receiving module 11 and the first The transmitting module 17 and the second transmitting module 19 can be integrated to form a transceiver unit, which is implemented as a transceiver corresponding to hardware. The above determining module 12, the obtaining module 13, the first processing module 14, the second processing module 15, the selecting module 16, the first sending module 17, the third processing module 18, and the second sending module 19 may be embedded in hardware or In the processor independent of the user equipment, it can also be stored in the memory of the user equipment in software, so as to be convenient The processor calls the operations corresponding to the above modules. The processor can be a central processing unit

(Central Processing Unit, referred to as CPU), microprocessor, microcontroller, etc.

 FIG. 9 is a schematic structural diagram of Embodiment 3 of a user equipment according to the present invention. As shown in FIG. 9, the user equipment in this embodiment may include a receiver 21, a transmitter 22, a memory 23, and a receiver 21, a transmitter 22, and a memory, respectively. 23 connected processor 24. Of course, the user equipment may also include a common component such as an antenna, a baseband processing component, a medium-frequency processing component, and an input/output device, and the embodiment of the present invention is not limited thereto.

 The memory 23 stores a set of program codes, and the processor 24 is configured to call the program code stored in the memory 23 for performing the following operations:

 Receiving, by the receiver 21, a DMRS indication message sent by the base station, where the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, where the DMRS pattern is a location of a time-frequency resource in which the DMRS exists and/or a resource element occupied by the DMRS a location in the time-frequency resource; the processor 24 determines a DMRS pattern of the DMRS antenna port according to the DMRS indication message; and acquires a DMRS according to the DMRS pattern of the DMRS antenna port.

 Further, the receiving, by the receiver 21, a DMRS indication message sent by the base station, where

The DMRS indication message is used to indicate the DMRS pattern of the DMRS antenna port, including:

 Receiving, by the receiver 21, a DMRS indication message sent by the base station, where the one DMRS indication message is used to indicate a DMRS pattern of the at least one DMRS antenna port; or receiving, by the receiver 21, at least two DMRS indications sent by the base station Message, each DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port.

 Further, the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, and the method includes: the DMRS indication message is used to indicate a density of the DMRS, a spacing of the DMRS, a bitmap encoding of the DMRS, and/or a time when the DMRS does not exist. The location of the frequency resource, wherein the density of the DMRS, the interval of the DMRS, the bitmap encoding of the DMRS, and/or the location of the time-frequency resource in which the DMRS does not exist is used to determine a DMRS pattern of the DMRS antenna port.

The DMRS indication message is further used to indicate any one or more of the following information: a maximum modulation order of the received data, a modulation coding scheme table of the received data, a maximum modulation order of the transmission data, and a modulation coding scheme table of the transmission data. And a channel quality indicator table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, where the sounding reference signal configuration parameter includes a period of the sounding reference signal and a subframe offset. The DMRS indication message further includes any one or more of the following information: a maximum modulation order of the received data, a modulation coding scheme table of the received data, a maximum modulation order of the transmission data, a modulation coding scheme table of the transmission data, and a channel. a quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, the sounding reference signal configuration parameter including a period of the sounding reference signal and a subframe offset.

 Further, in a first possible implementation, the DMRS indication message is a sequence of settings in the system information block, a main message block, a high layer signaling, a media access control signaling, a cyclic prefix, or The cell-specific signaling sent by the scrambling code in the cyclic prefix. Further, the cell-specific signaling includes a cell type corresponding to the base station, and the processor 24 determines, according to the DMRS indication message, a DMRS pattern of the DMRS antenna port, including:

 The processor 24 acquires a cell type according to the cell-specific signaling.

 The processor 24 determines a DMRS pattern of the DMRS antenna port according to the cell type. Optionally, the method further includes: the processor 24 determining any one or more of the following information according to the cell type: a maximum modulation order of the received data, a modulation coding scheme table of the received data, and a maximum modulation order of the transmitted data. a modulation coding scheme table for transmitting data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, wherein the sounding reference signal configuration parameter includes a period and a sub-detection reference signal Frame offset.

 In a second possible implementation manner, the DMRS indication message is user equipment specific signaling sent by the base station by using high layer signaling or medium access control signaling. Further, the user equipment-specific signaling includes a transmission mode of the physical downlink shared channel (PDSCH), and the processor 24 determines the DMRS pattern of the DMRS antenna port according to the DMRS indication message, where: the processor 24 is configured according to The user equipment-specific signaling acquires a transmission mode of the PDSCH; and the processor 24 determines a DMRS pattern of the DMRS antenna port according to the transmission mode of the PDSCH.

Optionally, the method further includes: the processor 24 determining any one or more of the following information according to the transmission mode of the PDSCH: a maximum modulation order of the received data, a modulation and coding scheme table of the received data, and a maximum modulation of the transmitted data. An order, a modulation and coding scheme table for transmitting data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, wherein the sounding reference signal configuration parameter includes a sounding reference signal Period and subframe offset. In a third possible implementation manner, the DMRS indication message is dynamic signaling that is sent by the base station by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel (EPDCCH), where the dynamic signaling includes any one of the following Or a plurality of information: N-bit signaling, signaling indicating a redundancy version, signaling indicating a modulation coding scheme, signaling indicating a number of antenna ports, scrambling code sequence and layer number, and new data indication signaling, N is a natural number; the processor 24 determines, according to the DMRS indication message, a DMRS pattern of the DMRS antenna port, including:

 The processor 24 determines a DMRS pattern of the DMRS antenna port according to the dynamic signaling. In a fourth possible implementation manner, the DMRS indication message is downlink control information that is sent by the base station by using a physical downlink control channel; and the processor 24 determines, according to the DMRS indication message, the DMRS antenna port. DMRS pattern, including:

 The processor 24 determines, according to the downlink control information, a subframe number of a subframe in which the downlink control information is located, or determines a subframe number of the subframe indicated by the downlink control information according to the downlink control information;

 The processor 24 determines a DMRS pattern of the DMRS antenna port based on the subframe number. Optionally, the processor 24 determines, according to the subframe number, a DMRS pattern of the DMRS antenna port, including:

 If the difference between the subframe number of the subframe in which the current downlink control information is located and the subframe number of the subframe in which the previous downlink control information is located is greater than the preset value of the first number difference, the processor 24 determines that the DMRS exists. The location of the frequency resource is the subframe in which the current downlink control information is located; or

 If the difference between the subframe number of the subframe indicated by the current downlink control information and the subframe number of the subframe in which the previous downlink control information is located is greater than a preset value of the second number difference, the processor 24 determines that the DMRS exists. The location of the time-frequency resource is the subframe indicated by the current downlink control information.

 Further, the time-frequency resource includes: a resource block pair, a resource block group, a half subframe, a subframe, a subframe group, or a resource block group on the subframe group. All of the M time-frequency resources are allocated to the resource blocks of the user equipment using the same pre-coding, and the M is a natural number.

 Further, in the first feasible implementation manner, the method further includes:

 The processor 24 obtains a mapping relationship between the PDSCH and/or the EPDCCH and the resource element according to the DMRS pattern;

 The processor 24 acquires the PDSCH and/or EPDCCH according to the mapping relationship;

The processor 24 demodulates the PDSCH and/or the EPDCCH according to the DMRS; or The processor 24 performs channel quality indication calculation based on the DMRS.

 In the second feasible implementation manner, the method further includes:

 Processor 24 determines an additional DMRS pattern of the DMRS antenna port, the additional DMRS pattern being a location of a time-frequency resource in which zero-power DMRS is present and/or a resource element occupied by the zero-power DMRS in the time-frequency resource Location

 The processor 24 obtains a mapping relationship between the PDSCH and/or the EPDCCH and the resource element according to the DMRS pattern of the DMRS antenna port and/or the additional DMRS pattern;

 The processor 24 acquires the PDSCH and/or EPDCCH according to the mapping relationship;

 The processor 24 demodulates the PDSCH and/or EPDCCH according to the DMRS.

 Further, the processor 24 determines an additional DMRS pattern of the DMRS antenna port, including:

 The processor 24 determines an additional DMRS pattern of the DMRS antenna port according to the DMRS indication message; or

 Receiving, by the receiver 21, an additional DMRS indication message sent by the base station;

 The processor 24 determines the attached port DMRS pattern of the DMRS antenna port based on the additional DMRS indication message.

 Further, in the first feasible implementation manner, before the receiving, by the receiver 21, the DMRS indication message sent by the base station, the method further includes:

 The processor 24 selects at least one DMRS pattern from the DMRS pattern candidate set; the at least one DMRS pattern is sent by the transmitter 22 to the base station through a high layer signaling or a physical uplink control channel PUCCH or a physical uplink shared channel PUSCH, so that Determining, by the base station, a DMRS pattern of the DMRS antenna port according to the at least one DMRS pattern.

 Further, the processor 24 selects at least one DMRS pattern from the DMRS pattern candidate set, including:

 The processor 24 selects the at least one DMRS pattern from the set of DMRS pattern candidates according to the moving speed of the user equipment or the downlink channel information or the DMRS processing capability of the user equipment.

 Further, the at least one DMRS pattern is sent by the transmitter 22 to the base station by using high layer signaling or PUCCH or PUSCH, including:

The rank indication and the at least one DMRS pattern are passed through the high layer by the transmitter 22 Signaling or PUCCH or PUSCH is sent to the base station.

 Further, the sending, by the transmitter 22, the rank indication and the at least one DMRS pattern to the base station by using the high layer signaling or PUCCH or PUSCH, including:

 The processor 24 jointly encodes the rank indication and the at least one DMRS pattern; the jointly encoded rank indication and the at least one DMRS pattern are transmitted by the transmitter 22 to the base station through the higher layer signaling or PUCCH or PUSCH.

 In the second feasible implementation manner, before the receiver 21 receives the DMRS indication message sent by the base station, the method further includes:

 The DMRS processing capability indication information is reported to the base station by the transmitter 22, so that the base station determines, according to the DMRS processing capability indication message, the number of DMRS patterns that the user equipment can process and/or the user equipment can process DMRS pattern.

 The user equipment in this embodiment may be used to perform the technical solution executed by the user equipment in the foregoing method embodiment of the present invention. The implementation principle and the technical effect are similar. For details, refer to the related description in the foregoing embodiment, and details are not described herein again. .

 FIG. 10 is a schematic structural diagram of Embodiment 1 of a base station according to the present invention. As shown in FIG. 10, the base station in this embodiment may include: a determining module 31 and a sending module 32, where the determining module 31 is configured to determine a DMRS pattern of a DMRS antenna port;

 The sending module 32 is configured to send a DMRS indication message to the user equipment, where the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, where the DMRS pattern is a location of a time-frequency resource in which the DMRS exists and/or a resource occupied by the DMRS a location of the element in the time-frequency resource, to enable the user equipment to determine a DMRS pattern of the DMRS antenna port according to the DMRS indication message, and obtain a DMRS according to the DMRS pattern of the DMRS antenna port; and to the user according to the DMRS pattern The device sends a DMRS.

 The base station in this embodiment may be used to perform the technical solution of the method embodiment shown in FIG. 3, and the principle and the technical effect are similar. For details, refer to related descriptions in the foregoing embodiments, and details are not described herein again.

FIG. 11 is a schematic structural diagram of Embodiment 2 of a base station according to the present invention. As shown in FIG. 11, the base station in this embodiment is based on the structure of the base station shown in FIG. 10, and further, the sending module 32 is specifically configured to send to the user equipment. a DMRS indication message, the one DMRS indication message is used to indicate a DMRS pattern of at least one DMRS antenna port; or, to send at least two to the user equipment A DMRS indication message, each DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port. The DMRS indication message sent by the sending module 32 is used to indicate the DMRS pattern of the DMRS antenna port, including: the DMRS indication message includes a density of the DMRS, a spacing of the DMRS, a bitmap encoding of the DMRS, and/or a time when the DMRS does not exist. The location of the frequency resource, the density of the DMRS, the spacing of the DMRS, the bitmap encoding of the DMRS, and/or the location of the time-frequency resource in which the DMRS does not exist is used to determine the DMRS pattern of the DMRS antenna port.

 Optionally, the DMRS indication message sent by the sending module 32 is further used to indicate any one or more of the following information: a maximum modulation order of the received data, a modulation coding scheme table of the received data, and a maximum modulation order of the transmitted data. a number, a modulation coding scheme table for transmitting data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, wherein the sounding reference signal configuration parameter includes a period of the sounding reference signal And subframe offset.

 Optionally, the DMRS indication message sent by the sending module 32 further includes any one or more of the following: a maximum modulation order of the received data, a modulation and coding scheme table of the received data, a maximum modulation order of the transmitted data, a modulation coding scheme table for transmitting data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, wherein the sounding reference signal configuration parameter includes a period and a subframe of the sounding reference signal Offset.

 In a first feasible implementation manner, the sending module 32 is specifically configured to use a system information block, a main message block, a high layer signaling, a media access control signaling, a setting sequence in a cyclic prefix, or a setting in a cyclic prefix. The scrambling code transmits cell-specific signaling to the user equipment. Further, the determining module 31 is specifically configured to determine a DMRS pattern of the DMRS antenna port according to the cell type, where the cell-specific signaling sent by the sending module 32 includes a cell type corresponding to the base station, so that the user equipment Determining the cell type according to the cell-specific signaling, and determining a DMRS pattern of the DMRS antenna port according to the cell type.

Optionally, the cell type is further used to determine any one or more of the following information: a maximum modulation order of the received data, a modulation and coding scheme table of the received data, a maximum modulation order of the transmitted data, and a modulation of the transmitted data. a coding scheme table, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, the sounding reference signal configuration parameter including a period of the sounding reference signal and a subframe offset. In a second possible implementation manner, the sending module 32 is specifically configured to send user equipment specific signaling to the user equipment by using high layer signaling or medium access control signaling. Further, the determining module 31 is specifically configured to determine a DMRS pattern of the DMRS antenna port according to the transmission mode of the physical downlink shared channel (PDSCH), where the user equipment specific signaling sent by the sending module 32 includes the transmission mode of the PDSCH, And causing the user equipment to determine a transmission mode of the PDSCH according to the user equipment specific signaling, and determine a DMRS pattern of the DMRS antenna port according to the transmission mode of the PDSCH.

 Optionally, the transmission mode of the PDSCH is further used to determine any one or more of the following information: a maximum modulation order of the received data, a modulation coding scheme table of the received data, a maximum modulation order of the transmitted data, and a sending data. a modulation coding scheme table, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, the sounding reference signal configuration parameter including a period and a subframe offset of the sounding reference signal .

 In a third possible implementation manner, the sending module 32 is specifically configured to send dynamic signaling to the user equipment by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel (EPDCCH), so that the user equipment is configured according to the dynamic Decoding to determine a DMRS pattern of the DMRS antenna port, where the dynamic signaling includes any one or more of the following: N-bit signaling, signaling indicating a redundancy version, signaling indicating a modulation and coding scheme MCS, Signaling indicating the number of antenna ports, scrambling code sequence and layer number, and new transmission data indicating signaling, where N is a natural number.

 In a fourth possible implementation manner, the sending module 32 is specifically configured to send downlink control information to the user equipment by using a physical downlink control channel PDCCH, so that the user equipment determines the downlink control information according to the downlink control information. a subframe number of the subframe in which the subframe is located, or the user equipment determines, according to the downlink control information, a subframe number of the subframe indicated by the downlink control information, and determines, according to the subframe number, the subframe number. DMRS pattern of the DMRS antenna port.

 Further, the time-frequency resource includes: a resource block pair, a resource block group, a half subframe, a subframe, a subframe group, or a resource block group on the subframe group. All of the M time-frequency resources are allocated to the resource blocks of the user equipment using the same pre-coding, and the M is a natural number.

Further, in the first feasible implementation, the apparatus in this embodiment may further include: a first processing module 33, where the first processing module 33 is configured to determine, after the module 31 determines the DMRS pattern of the DMRS antenna port, according to the The DMRS pattern performs resource mapping of the PDSCH and/or the EPDCCH and the resource element; the sending module 32 is further configured to send the PDSCH and/or the EPDCCH Send to the user equipment.

 In a second possible implementation manner, the apparatus in this embodiment may further include: a second processing module 34, where the determining module 31 is further configured to determine an additional DMRS pattern of the DMRS antenna port, where the additional DMRS pattern is zero. The location of the time-frequency resource of the power DMRS and/or the location of the resource element occupied by the zero-power DMRS in the time-frequency resource; the second processing module 34 is configured to determine the DMRS antenna port according to the determining module 31 The DMRS pattern and/or the additional DMRS pattern performs resource mapping of the PDSCH and/or the EPDCCH and the resource element; the sending module 32 is further configured to send the PDSCH and/or the EPDCCH to the user equipment.

 Further, the DMRS indication message is further used to indicate an additional DMRS pattern of the DMRS antenna port, so that the user equipment determines an additional DMRS pattern of the DMRS antenna port according to the DMRS indication message; or

 The sending module 32 is further configured to: after the determining module 31 determines the additional DMRS pattern of the DMRS antenna port, send an additional DMRS indication message to the user equipment, where the additional DMRS indication message is used to indicate an additional DMRS of the DMRS antenna port. a pattern to cause the user equipment to determine an additional DMRS pattern of the DMRS antenna port based on the additional DMRS indication message.

 Further, the base station of this embodiment further includes a first receiving module 35.

 In a first possible implementation, the first receiving module 35 is configured to receive, by the determining module 31, the DMRS pattern of the DMRS antenna port, the user equipment, by using the high layer signaling or the physical uplink control channel, the PUCCH, or the physical uplink shared channel. At least one DMRS pattern sent by the PUSCH, the at least one DMRS pattern is selected by the user equipment from the DMRS pattern candidate set; the determining module 31 is specifically configured to determine the according to the at least one DMRS pattern received by the first receiving module 35 DMRS pattern of the DMRS antenna port.

 Further, the at least one DMRS pattern is selected by the user equipment from the DMRS pattern candidate set according to the moving speed or downlink channel information of the user equipment or the DMRS processing capability of the user equipment.

 Further, the first receiving module 35 is specifically configured to receive a rank indication sent by the user equipment by using the high layer signaling or PUCCH or PUSCH, and the at least one DMRS pattern.

Preferably, the first receiving module 35 is specifically configured to receive the jointly encoded rank indication and the at least one DMRS pattern sent by the user equipment by using the high layer signaling or the PUCCH or the PUSCH. In a second possible implementation manner, the apparatus in this embodiment may further include a second receiving module.

The second receiving module 36 is configured to receive the DMRS processing capability indication information reported by the user equipment before the determining module 31 determines the DMRS pattern of the DMRS antenna port. The determining module 31 is further configured to use the DMRS processing capability indication information according to the DMRS processing capability indication information. Determining the number of DMRS patterns that the user equipment can process and/or the DMRS pattern that the user equipment can process.

 Further, the base station in this embodiment may further include a third processing module 37, where the third processing module 37 is configured to determine, if the at least two candidate DMRS patterns of the DMRS antenna port have overlapping resources in the same time-frequency resource. And mapping, by the at least two candidate DMRS patterns, the same DMRS on the resource elements overlapping in the same time-frequency resource.

 The base station in this embodiment may be used to perform the technical solution executed by the base station in the foregoing embodiment of the present invention. The implementation principle and the technical effect are similar. For details, refer to related descriptions in the foregoing embodiments, and details are not described herein again.

 It should be noted that, in hardware implementation, the foregoing sending module 32 may be a transmitter or a transceiver, and the first receiving module 35 and the second receiving module 36 may be a receiver or a transceiver, and the sending module 32 and the first receiving module. The 35 and the second receiving module 36 can be integrated to form a transceiver unit, which is implemented as a transceiver corresponding to hardware. The above determining module 31, the sending module 32, the first processing module 33, the second processing module 34, the first receiving module 35, the second receiving module 36 and the third processing module 37 may be embedded in hardware or independent of the base station. The processor may also be stored in the memory of the base station in software, so that the processor calls to perform operations corresponding to the above modules. The processor can be a CPU, a microprocessor, a microcontroller, or the like.

 12 is a schematic structural diagram of Embodiment 3 of a base station according to the present invention. As shown in FIG. 12, the base station in this embodiment may include a transmitter 41, a receiver 42, a memory 43, and a transmitter 41, a receiver 42, and a memory 43 respectively. Processor 44. Of course, the base station may also include a common component such as an antenna, a baseband processing component, a medium-frequency processing component, and an input/output device, and the embodiment of the present invention is not limited thereto.

 The memory 43 stores a set of program codes, and the processor 44 is configured to call the program code stored in the memory 43 for performing the following operations:

The processor 44 determines a DMRS pattern of the DMRS antenna port, and sends a DMRS indication message by the transmitter 41, where the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, including: the DMRS indication message is used to indicate the DMRS of the DMRS antenna port. Pattern, said The DMRS pattern is a location of the time-frequency resource in which the DMRS exists and/or a location of the resource element occupied by the DMRS in the time-frequency resource, so that the user equipment determines the DMRS pattern of the DMRS antenna port according to the DMRS indication message, and according to the The DMRS pattern of the DMRS antenna port acquires the DMRS; the processor 44 transmits the DMRS to the user equipment through the transmitter 41 according to the DMRS pattern.

 Further, the DMRS indication message is sent by the transmitter 41 to the user equipment, where the DMRS indication message is used to indicate the DMRS pattern of the DMRS antenna port, including:

 Transmitting, by the transmitter 41, a DMRS indication message to the user equipment, where the one DMRS indication message is used to indicate a DMRS pattern of the at least one DMRS antenna port; or, the transmitter 41 sends the at least two DMRS indications to the user equipment. Message, each

The DMRS indication message is used to indicate the DMRS pattern of a DMRS antenna port.

 Further, the DMRS indication message includes a density of the DMRS, a spacing of the DMRS, a bitmap encoding of the DMRS, and/or a location of a time-frequency resource in which the DMRS does not exist, a density of the DMRS, a spacing of the DMRS, and a location of the DMRS. The bitmap encoding and/or the location of the time-frequency resource in which the DMRS does not exist is used to determine the DMRS pattern of the DMRS antenna port.

 Optionally, the DMRS indication message is further used to indicate any one or more of the following information: a maximum modulation order of the received data, a modulation coding scheme table of the received data, a maximum modulation order of the transmitted data, and a data transmission a modulation coding scheme table, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, the sounding reference signal configuration parameter including a period of the sounding reference signal and a subframe offset.

 Optionally, the DMRS indication message further includes any one or more of the following: a maximum modulation order of the received data, a modulation and coding scheme table of the received data, a maximum modulation order of the transmitted data, and a modulation coding of the transmitted data. a scheme table, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, where the sounding reference signal configuration parameter includes a period of the sounding reference signal and a subframe offset.

 In a first feasible implementation manner, the sending, by using the transmitter 41, the DMRS indication message to the user equipment, includes: passing the system information block, the main message block, the high layer signaling, the medium access control signaling, and the cyclic prefix. The set scrambling code in the set sequence or cyclic prefix is transmitted by the transmitter 41 to the user equipment for cell-specific signaling.

Further, the processor 44 determines a DMRS pattern of the DMRS antenna port, including: The processor 44 determines a DMRS pattern of the DMRS antenna port according to the cell type, where the cell-specific signaling includes a cell type corresponding to the base station, so that the user equipment determines the manner according to the cell-specific signaling. a cell type, and determining a DMRS pattern of the DMRS antenna port according to the cell type.

 Optionally, the cell type is further used to determine any one or more of the following information: a maximum modulation order of the received data, a modulation and coding scheme table of the received data, a maximum modulation order of the transmitted data, and a modulation of the transmitted data. a coding scheme table, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, the sounding reference signal configuration parameter including a period of the sounding reference signal and a subframe offset.

 In a second feasible implementation manner, the sending is sent by the transmitter 41 to the user equipment.

The DMRS indication message includes: transmitting, by the transmitter 41, user equipment specific signaling to the user equipment by using high layer signaling or medium access control signaling.

 Further, the determining, by the processor 44, the DMRS pattern of the DMRS antenna port, the method includes: the processor 44 determining a DMRS pattern of the DMRS antenna port according to a transmission mode of the physical downlink shared channel (PDSCH), where the user equipment proprietary signaling includes Determining a transmission mode of the PDSCH, so that the user equipment determines a transmission mode of the PDSCH according to the user equipment specific signaling, and determines a DMRS pattern of the DMRS antenna port according to a transmission mode of the PDSCH.

 Optionally, the transmission mode of the PDSCH is further used to determine any one or more of the following information: a maximum modulation order of the received data, a modulation coding scheme table of the received data, a maximum modulation order of the transmitted data, and a sending data. a modulation coding scheme table, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, the sounding reference signal configuration parameter including a period and a subframe offset of the sounding reference signal .

In a third possible implementation, the sending, by the transmitter 41, the DMRS indication message to the user equipment includes: transmitting, by the transmitter 41, the user to the user by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH. The device sends dynamic signaling, so that the user equipment determines a DMRS pattern of the DMRS antenna port according to the dynamic signaling, where the dynamic signaling includes any one or more of the following information: N-bit signaling, indication Redundant version of signaling, signaling indicating modulation coding scheme MCS, signaling indicating number of antenna ports, scrambling code sequence and layer number, and new transmission data indicating signaling, said N being a natural number. In a fourth possible implementation, the sending, by the transmitter 41, the DMRS indication message to the user equipment, includes: sending, by using the physical downlink control channel PDCCH, the downlink control information by the transmitter 41 to the user equipment, so that Determining, by the user equipment, the subframe number of the subframe in which the downlink control information is located, or determining, by the user equipment, the subframe indicated by the downlink control information according to the downlink control information. a subframe number, and determining a DMRS pattern of the DMRS antenna port according to the subframe number.

 Further, the time-frequency resource includes: a resource block pair, a resource block group, a half subframe, a subframe, a subframe group, or a resource block group on the subframe group. All of the M time-frequency resources are allocated to the resource blocks of the user equipment using the same pre-coding, and the M is a natural number.

 Further, in a first feasible implementation manner, after the determining, by the processor 44, the DMRS pattern of the DMRS antenna port, the method further includes:

 The processor 44 performs resource mapping of the PDSCH and/or the EPDCCH and the resource element according to the DMRS pattern; and transmits the PDSCH and/or the EPDCCH to the user equipment by using the transmitter 41.

 In a second possible implementation manner, the processor 44 determines a DMRS antenna port.

After the DMRS pattern, it also includes:

 The processor 44 performs resource mapping of the PDSCH and/or the EPDCCH and the resource element according to the DMRS pattern of the DMRS antenna port and/or the additional DMRS pattern, where the additional DMRS pattern is the location of the time-frequency resource in which the zero-power DMRS is present and/or The location of the resource element occupied by the zero-power DMRS in the time-frequency resource; further, the DMRS indication message is further used to indicate an additional DMRS pattern of the DMRS antenna port, so that the user equipment is configured according to the a DMRS indication message determining an additional DMRS pattern of the DMRS antenna port; or

 After the processor 44 determines the additional DMRS pattern of the DMRS antenna port, the processor 44 further includes:

Sending, by the transmitter 41, an additional DMRS indication message to the user equipment, where the additional DMRS indication message is used to indicate an additional DMRS pattern of the DMRS antenna port, so that the user equipment determines, according to the additional DMRS indication message, Additional DMRS pattern for the DMRS antenna port. Further, in a first feasible implementation manner, before the determining, by the processor 44, the DMRS pattern of the DMRS antenna port, the method further includes: receiving, by the receiver 42, the user equipment by using a high layer signaling or a physical uplink control channel PUCCH Or at least one DMRS pattern sent by the physical uplink shared channel PUSCH, where the at least one DMRS pattern is selected by the user equipment from the DMRS pattern candidate set;

 The processor 44 determines a DMRS pattern of the DMRS antenna port, including:

 The processor 44 determines a DMRS pattern of the DMRS antenna port based on the at least one DMRS pattern.

 Further, the at least one DMRS pattern is selected by the user equipment from the DMRS pattern candidate set according to the moving speed or downlink channel information of the user equipment or the DMRS processing capability of the user equipment.

 Further, the receiving, by the receiver 42, the at least one DMRS pattern that is sent by the user equipment by using the high layer signaling or the PUCCH or the PUSCH, includes: receiving, by the receiver 42, the user equipment by using the high layer signaling or PUCCH or A rank indication sent by the PUSCH and the at least one DMRS pattern.

 Preferably, the receiving, by the receiver 42, the rank indication sent by the user equipment by using the high layer signaling or the PUCCH or the PUSCH, and the at least one DMRS pattern, including: receiving, by the receiver 42, the user equipment by using the The jointly encoded rank indication and the at least one DMRS pattern transmitted by the higher layer signaling or PUCCH or PUSCH.

 In a second possible implementation manner, the processor 44 determines a DMRS antenna port.

Before the DMRS pattern, the method further includes: receiving, by the receiver 42, the DMRS processing capability indication information on the user equipment; the processor 44 determining, according to the DMRS processing capability indication information, the number of DMRS patterns that the user equipment can process. And/or a DMRS pattern that the user equipment is capable of processing.

 Further, the method further includes: the processor 44 determining, if the at least two candidate DMRS patterns of the DMRS antenna port have overlapping resource elements in the same time-frequency resource, according to the at least two candidate DMRS patterns. Mapping the same DMRS on overlapping resource elements in a time-frequency resource

The base station in this embodiment may be used to perform the technical solution executed by any one of the foregoing method embodiments of the present invention. The implementation principle and technical effects are similar. For details, refer to the foregoing embodiment. Relevant records are not described here.

 FIG. 13 is a schematic structural diagram of an embodiment of a DMRS transmission system according to the present invention. As shown in FIG. 13, the system in this embodiment includes: a user equipment 50 and a base station 60, wherein the user equipment 50 can use any of the devices in FIG. 7 to FIG. Correspondingly, the technical solution executed by any user equipment in the foregoing method embodiments of the present invention may be implemented. The implementation principle and the technical effect are similar. For details, refer to the related description in the foregoing embodiment. Let me repeat. The base station 60 can use the structure of any of the apparatus embodiments of FIG. 10 to FIG. 12, and correspondingly, the technical solution executed by any base station in the foregoing method embodiment of the present invention can be executed, and the implementation principle and the technical effect are similar. Refer to the related description in the above embodiments, and details are not described herein again.

 A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The method includes the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

 Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting thereof; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

Claims
A demodulation reference signal DMRS transmission method, characterized in that it comprises:
 The user equipment receives a DMRS indication message sent by the base station, where the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, where the DMRS pattern is a location of a time-frequency resource in which the DMRS exists and/or a resource element occupied by the DMRS is located in the The location in the time-frequency resource;
 Determining, by the user equipment, a DMRS pattern of the DMRS antenna port according to the DMRS indication message;
 The user equipment acquires the DMRS according to a DMRS pattern of the DMRS antenna port.
2. The method according to claim 1, wherein the user equipment receives a DMRS indication message sent by a base station, where the DMRS indication message is used to indicate a DMRS antenna port.
DMRS pattern, including:
 Receiving, by the user equipment, a DMRS indication message sent by the base station, where the one DMRS indication message is used to indicate a DMRS pattern of the at least one DMRS antenna port; or the user equipment receives the at least two DMRS indications sent by the base station Message, each DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port.
 The method according to claim 1 or 2, wherein the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, including:
 The DMRS indication message is used to indicate a density of the DMRS, a spacing of the DMRS, a bitmap encoding of the DMRS, and/or a location of a time-frequency resource in which the DMRS does not exist, where the density of the DMRS, the interval of the DMRS, and the DMRS The bitmap encoding and/or the location of the time-frequency resource in which the DMRS does not exist is used to determine the DMRS pattern of the DMRS antenna port.
 The method according to any one of claims 1 to 3, wherein the DMRS indication message is that the base station passes a system information block, a main message block, a high layer signaling, a medium access control signaling, and a loop. The cell-specific signaling sent by the scrambling code in the set sequence in the prefix or in the cyclic prefix.
 The method according to claim 4, wherein the cell-specific signaling includes a cell type corresponding to the base station; and the user equipment determines the DMRS antenna port according to the DMRS indication message. DMRS pattern, including:
 The user equipment acquires a cell type according to the cell-specific signaling;
The user equipment determines a DMRS pattern of the DMRS antenna port according to the cell type. The method according to any one of claims 1 to 3, wherein the DMRS indication message is user equipment specific signaling sent by the base station by using high layer signaling or medium access control signaling.
 The method according to claim 6, wherein the user equipment-specific signaling includes a transmission mode of a physical downlink shared channel (PDSCH); and the user equipment determines the DMRS antenna according to the DMRS indication message. The DMRS pattern of the port, including:
 The user equipment acquires a transmission mode of the PDSCH according to the user equipment specific signaling;
 The user equipment determines a DMRS pattern of the DMRS antenna port according to a transmission mode of the PDSCH.
 The method according to claim 4 or 6, wherein the DMRS indication message is further used to indicate any one or more of the following information: a maximum modulation order of the received data, and a modulation and coding scheme of the received data. a table, a maximum modulation order of the transmitted data, a modulation coding scheme table of the transmission data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, the sounding reference signal The configuration parameters include the period of the sounding reference signal and the subframe offset.
 9. The method according to claim 5, further comprising:
 The user equipment determines any one or more of the following information according to the cell type: a maximum modulation order of the received data, a modulation and coding scheme table of the received data, a maximum modulation order of the transmitted data, and a modulation coding of the transmitted data. a scheme table, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, where the sounding reference signal configuration parameter includes a period of the sounding reference signal and a subframe offset.
 10. The method according to claim 7, further comprising:
 The user equipment determines any one or more of the following information according to the transmission mode of the PDSCH: a maximum modulation order of the received data, a modulation coding scheme table of the received data, a maximum modulation order of the transmitted data, and a data transmission a modulation coding scheme table, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, the sounding reference signal configuration parameter including a period of the sounding reference signal and a subframe offset.
The method according to any one of claims 1 to 3, wherein the DMRS indication message is that the base station passes the physical downlink control channel PDCCH or enhanced physical downlink control. Dynamic signaling sent by the channel EPDCCH, the dynamic signaling includes any one or more of the following information: N-bit signaling, signaling indicating a redundancy version, signaling indicating a modulation and coding scheme, indicating the number of antenna ports, The signaling sequence of the scrambling code sequence and the layer number, the new data transmission signaling, the N is a natural number; and the user equipment determines, according to the DMRS indication message, the DMRS pattern of the DMRS antenna port, including:
 The user equipment determines a DMRS pattern of the DMRS antenna port according to the dynamic signaling.
 The method according to any one of claims 1 to 3, wherein the DMRS indication message is downlink control information that is sent by the base station through a physical downlink control channel; and the user equipment is instructed according to the DMRS. a message, determining a DMRS pattern of the DMRS antenna port, including:
 Determining, by the user equipment, the subframe number of the subframe in which the downlink control information is located, or determining, according to the downlink control information, a subframe number of the subframe indicated by the downlink control information. ;
 The user equipment determines a DMRS pattern of the DMRS antenna port according to the subframe number.
 The method according to claim 12, wherein the determining, by the user equipment, the DMRS pattern of the DMRS antenna port according to the subframe number, includes:
 If the difference between the subframe number of the subframe in which the current downlink control information is located and the subframe number of the subframe in which the previous downlink control information is located is greater than a preset value of the first number difference, the user equipment determines that the DMRS exists. The position of the time-frequency resource is the subframe in which the current downlink control information is located; or, if the difference between the subframe number of the subframe indicated by the current downlink control information and the subframe number of the subframe in which the previous downlink control information is located is greater than And determining, by the user equipment, that the location of the time-frequency resource in which the DMRS exists is the subframe indicated by the current downlink control information.
 The method according to any one of claims 1 to 13, wherein the time-frequency resource comprises: a resource block pair, a resource block group, a half subframe, a subframe, a subframe group or a subframe group. Resource block group.
The method according to any one of claims 1 to 14, wherein all of the M time-frequency resources are allocated to the resource blocks of the user equipment using the same pre-coding, and the M is a natural number. . The method according to any one of claims 1 to 15, further comprising: the user equipment acquiring the PDSCH according to the DMRS pattern of the DMRS antenna port
/ or mapping relationship between EPDCCH and resource elements;
 The user equipment acquires the PDSCH and/or the EPDCCH according to the mapping relationship; the user equipment demodulates the PDSCH and/or the EPDCCH according to the DMRS; or the user equipment performs channel quality according to the DMRS. Indicates CQI calculation.
 The method according to any one of claims 1 to 15, further comprising: the user equipment determining an additional DMRS pattern of the DMRS antenna port, where the additional DMRS pattern is when there is a zero power DMRS The location of the frequency resource and/or the location of the resource element occupied by the zero-power DMRS in the time-frequency resource;
 And the user equipment acquires a mapping relationship between the PDSCH and/or the EPDCCH and the resource element according to the DMRS pattern of the DMRS antenna port and/or the additional DMRS pattern;
 And the user equipment acquires the PDSCH and/or the EPDCCH according to the mapping relationship; and the user equipment demodulates the PDSCH and/or the EPDCCH according to the DMRS.
 18. The method according to claim 17, wherein the user equipment determines the
Additional DMRS patterns for DMRS antenna ports, including:
 Determining, by the user equipment, an additional DMRS pattern of the DMRS antenna port according to the DMRS indication message; or
 Receiving, by the user equipment, an additional DMRS indication message sent by the base station;
 The user equipment determines an additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message.
 The method according to any one of claims 1 to 18, wherein before the user equipment receives the DMRS indication message sent by the base station, the method further includes:
 The user equipment selects at least one DMRS pattern from the DMRS pattern candidate set; the user equipment sends the at least one DMRS pattern to the base station by using a high layer signaling or a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) to And causing the base station to determine a DMRS pattern of the DMRS antenna port according to the at least one DMRS pattern.
 The method according to claim 19, wherein the user equipment selects at least one DMRS pattern from the DMRS pattern candidate set, including:
The user equipment according to the moving speed or downlink channel information of the user equipment or the user The DMRS processing capability of the device, selecting the at least one DMRS pattern from the set of DMRS pattern candidates.
 The method according to claim 19 or 20, wherein the user equipment sends the at least one DMRS pattern to the base station by using high layer signaling or PUCCH or PUSCH, including:
 The user equipment sends the rank indication together with the at least one DMRS pattern to the base station through the high layer signaling or PUCCH or PUSCH.
 The method according to claim 21, wherein the user equipment sends the rank indication and the at least one DMRS pattern to the base station by using the high layer signaling or PUCCH or PUSCH, including:
 And the user equipment jointly encodes the rank indication and the at least one DMRS pattern; the user equipment sends the jointly encoded rank indication and the at least one DMRS pattern to the base station by using the high layer signaling or PUCCH or PUSCH.
 The method according to any one of claims 1 to 18, wherein before the user equipment receives the DMRS indication message sent by the base station, the method further includes:
 The user equipment reports the DMRS processing capability indication information to the base station, so that the base station determines, according to the DMRS processing capability indication message, the number of DMRS patterns that the user equipment can process and/or the user equipment can process DMRS pattern.
 24. A demodulation reference signal DMRS transmission method, comprising:
 The base station determines a DMRS pattern of the DMRS antenna port;
 The eNB sends a DMRS indication message to the user equipment, where the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, where the DMRS pattern is a location of a time-frequency resource in which the DMRS exists and/or a resource occupied by the DMRS. Positioning the element in the time-frequency resource, so that the user equipment determines a DMRS pattern of the DMRS antenna port according to the DMRS indication message, and acquires the DMRS according to a DMRS pattern of the DMRS antenna port;
 The base station sends the DMRS to the user equipment according to the DMRS pattern.
 The method according to claim 24, wherein the base station sends a DMRS indication message to the user equipment, where the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, including:
Sending, by the base station, a DMRS indication message to the user equipment, where the one DMRS The indication message is used to indicate a DMRS pattern of the at least one DMRS antenna port; or the base station sends at least two DMRS indication messages to the user equipment, where each DMRS indication message is used to indicate a DMRS pattern of one DMRS antenna port.
 The method according to claim 24 or 25, wherein the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, including:
 The DMRS indication message includes a density of the DMRS, a spacing of the DMRS, a bitmap encoding of the DMRS, and/or a location of a time-frequency resource in which the DMRS does not exist, a density of the DMRS, a spacing of the DMRS, and the bitmap of the DMRS. The location of the time-frequency resource that encodes and/or the absence of the DMRS is used to determine the DMRS pattern of the DMRS antenna port.
 The method according to any one of claims 24 to 26, wherein the sending, by the base station, the DMRS indication message to the user equipment, includes:
 The base station sends cell-specific signaling to the user equipment by using a system information block, a main message block, a high layer signaling, a media access control signaling, a set sequence in a cyclic prefix, or a set scrambling code in a cyclic prefix. .
 The method according to claim 27, wherein the determining, by the base station, the DMRS pattern of the DMRS antenna port comprises:
 Determining, by the base station, a DMRS pattern of the DMRS antenna port according to the cell type;
 The cell-specific signaling includes a cell type corresponding to the base station, so that the user equipment determines the cell type according to the cell-specific signaling, and determines the DMRS according to the cell type. The DMRS pattern of the antenna port.
 The method according to any one of claims 24 to 26, wherein the sending, by the base station, the DMRS indication message to the user equipment, includes:
 The base station sends user equipment specific signaling to the user equipment by using high layer signaling or medium access control signaling.
 The method according to claim 29, wherein the determining, by the base station, the DMRS pattern of the DMRS antenna port comprises:
 Determining, by the base station, a DMRS pattern of a DMRS antenna port according to a transmission mode of the physical downlink shared channel PDSCH;
The user equipment-specific signaling includes a transmission mode of the PDSCH, so that the user equipment determines a transmission mode of the PDSCH according to the user equipment-specific signaling, and according to The transmission mode of the PDSCH determines a DMRS pattern of the DMRS antenna port.
 The method according to claim 27 or 29, wherein the DMRS indication message is further used to indicate any one or more of the following information: a maximum modulation order of the received data, and a modulation and coding scheme of the received data. a table, a maximum modulation order of the transmitted data, a modulation coding scheme table of the transmission data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, the sounding reference signal The configuration parameters include the period of the sounding reference signal and the subframe offset.
 The method according to claim 28, wherein the cell type is further used to determine any one or more of the following information: a maximum modulation order of the received data, a modulation coding scheme table of the received data, and a sending a maximum modulation order of the data, a modulation coding scheme table of the transmission data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, where the sounding reference signal configuration parameter includes The period of the sounding reference signal and the subframe offset are detected.
 33. The method according to claim 30, wherein the transmission mode of the PDSCH is further used to determine any one or more of the following information: a maximum modulation order of the received data, and a modulation coding scheme table of the received data. a maximum modulation order of the transmitted data, a modulation and coding scheme table for transmitting data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, and the sounding reference signal configuration The parameters include the period of the sounding reference signal and the subframe offset.
 The method according to any one of claims 24 to 26, wherein the sending, by the base station, the DMRS indication message to the user equipment, includes:
 The base station sends dynamic signaling to the user equipment by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH, so that the user equipment determines a DMRS pattern of the DMRS antenna port according to the dynamic signaling. The dynamic signaling includes any one or more of the following information: N-bit signaling, signaling indicating a redundancy version, signaling indicating a modulation coding scheme MCS, a number indicating an antenna port number, a scrambling code sequence, and a layer number The new transmission data indicates signaling, and the N is a natural number.
 The method according to any one of claims 24 to 26, wherein the sending, by the base station, the DMRS indication message to the user equipment, includes:
The base station sends downlink control to the user equipment by using a physical downlink control channel PDCCH And determining, by the user equipment, the subframe number of the subframe in which the downlink control information is located according to the downlink control information, or to enable the user equipment to determine the downlink control information according to the downlink control information. a subframe number of the indicated subframe, and determining the number according to the subframe number
DMRS pattern of the DMRS antenna port.
 The method according to any one of claims 24 to 35, wherein the time-frequency resource comprises: a resource block pair, a resource block group, a half subframe, a subframe, a subframe group or a subframe group. Resource block group.
 The method according to any one of claims 24 to 36, wherein all of the M time-frequency resources are allocated to the resource blocks of the user equipment using the same pre-coding, and the M is a natural number. .
 The method according to any one of claims 24 to 37, wherein after the determining, by the base station, the DMRS pattern of the DMRS antenna port, the method further includes:
 The base station performs resource mapping of the PDSCH and/or the EPDCCH and the resource element according to the DMRS pattern of the DMRS antenna port;
 The base station sends the PDSCH and/or EPDCCH to the user equipment.
 The method according to any one of claims 24 to 37, further comprising: the base station determining an additional DMRS pattern of the DMRS antenna port;
 Performing, by the base station, resource mapping of a PDSCH and/or an EPDCCH and a resource element according to a DMRS pattern of the DMRS antenna port and/or an additional DMRS pattern, where the additional DMRS pattern is a location and/or a time-frequency resource in which a zero-power DMRS exists. a location of the resource element occupied by the zero-power DMRS in the time-frequency resource;
 The base station sends the PDSCH and/or EPDCCH to the user equipment.
The method according to claim 39, wherein the DMRS indication message is further used to indicate an additional DMRS pattern of the DMRS antenna port, so that the user equipment determines the DMRS according to the DMRS indication message. And the additional DMRS pattern of the antenna port, or the base station sends an additional DMRS indication message to the user equipment, where the additional DMRS indication message is used to indicate An additional DMRS pattern of the DMRS antenna port to cause the user equipment to determine an additional DMRS pattern of the DMRS antenna port based on the additional DMRS indication message. The method according to any one of claims 24 to 40, wherein before the determining, by the base station, the DMRS pattern of the DMRS antenna port, the method further includes:
 The base station receives, by the user equipment, at least one DMRS pattern that is sent by the user equipment by using the high layer signaling or the physical uplink control channel PUCCH or the physical uplink shared channel (PUSCH), where the at least one DMRS pattern is selected by the user equipment from the DMRS pattern candidate set. of;
 The base station determines a DMRS pattern of the DMRS antenna port, including:
 Determining, by the base station, a DMRS pattern of the DMRS antenna port according to the at least one DMRS pattern.
 The method according to claim 41, wherein the at least one DMRS pattern is that the user equipment is configured according to the moving speed or downlink channel information of the user equipment or the DMRS processing capability of the user equipment. Selected from the DMRS pattern candidate set.
 The method according to claim 41 or 42, wherein the receiving, by the base station, the at least one DMRS pattern that is sent by the user equipment by using the high layer signaling or the PUCCH or the PUSCH, includes:
 And the base station receives a rank indication sent by the user equipment by using the high layer signaling or a PUCCH or a PUSCH, and the at least one DMRS pattern.
 The method according to claim 43, wherein the receiving, by the base station, the rank indication and the at least one DMRS pattern sent by the user equipment by using the high layer signaling or the PUCCH or the PUSCH, the method includes:
 And the base station receives the jointly encoded rank indication and the at least one DMRS pattern sent by the user equipment by using the high layer signaling or PUCCH or PUSCH.
 The method according to any one of claims 24 to 40, wherein before the determining, by the base station, the DMRS pattern of the DMRS antenna port, the method further includes:
 Receiving, by the base station, DMRS processing capability indication information reported by the user equipment;
 The base station determines, according to the DMRS processing capability indication information, the number of DMRS patterns that the user equipment can handle and/or the DMRS pattern that the user equipment can process.
The method according to any one of claims 24 to 45, further comprising: if at least two candidate DMRS patterns of the DMRS antenna port have overlapping resource elements in the same time-frequency resource, And mapping the same DMRS on the resource elements overlapping in the same time-frequency resource according to the at least two candidate DMRS patterns. 47. A user equipment, comprising:
 a receiving module, configured to receive a DMRS indication message sent by the base station, where the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, where the DMRS pattern is a location of a time-frequency resource in which the DMRS exists and/or a resource occupied by the DMRS a location of the element in the time-frequency resource; a determining module, configured to determine, according to the DMRS indication message received by the receiving module
DMRS pattern of the DMRS antenna port;
 And an obtaining module, configured to acquire the DMRS according to a DMRS pattern of the DMRS antenna port determined by the determining module.
 The user equipment according to claim 47, wherein the receiving module is specifically configured to:
 Receiving a DMRS indication message sent by the base station, where the one DMRS indication message is used to indicate a DMRS pattern of at least one DMRS antenna port; or
 Receiving at least two DMRS indication messages sent by the base station, each DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port.
 The user equipment according to claim 47 or 48, wherein the DMRS indication message received by the receiving module is used to indicate a DMRS pattern of a DMRS antenna port, including:
 The DMRS indication message is used to indicate a density of the DMRS, a spacing of the DMRS, a bitmap encoding of the DMRS, and/or a location of a time-frequency resource in which the DMRS does not exist, where the density of the DMRS, the interval of the DMRS, and the DMRS The bitmap encoding and/or the location of the time-frequency resource in which the DMRS does not exist is used to determine the DMRS pattern of the DMRS antenna port.
 The user equipment according to any one of claims 47 to 49, wherein the DMRS indication message received by the receiving module is a system information block, a main message block, a high layer signaling, and a media. Cell-specific signaling sent by the access control signaling, the set sequence in the cyclic prefix, or the set scrambling code in the cyclic prefix.
 The user equipment according to claim 50, wherein the cell-specific signaling received by the receiving module includes a cell type corresponding to the base station;
 The determining module is specifically configured to obtain a cell type according to the cell-specific signaling received by the receiving module, and determine a DMRS pattern of the DMRS antenna port according to the cell type.
The user equipment according to any one of claims 47 to 49, wherein The DMRS indication message received by the receiving module is user equipment specific signaling sent by the base station by using high layer signaling or medium access control signaling.
 The user equipment according to claim 52, wherein the user equipment specific signaling received by the receiving module includes a transmission mode of a physical downlink shared channel PDSCH;
 The determining module is specifically configured to acquire a transmission mode of the PDSCH according to the user equipment proprietary signal received by the receiving module, and determine a DMRS pattern of the DMRS antenna port according to the transmission mode of the PDSCH.
 The user equipment according to claim 50 or 52, wherein the DMRS indication message received by the receiving module is further used to indicate any one or more of the following information: a maximum modulation order of the received data. a modulation coding scheme table for receiving data, a maximum modulation order of transmission data, a modulation coding scheme table for transmitting data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and feedback Mode, the sounding reference signal configuration parameter includes a period of the sounding reference signal and a subframe offset.
 The user equipment according to claim 51, wherein the determining module is further configured to determine any one or more of the following information according to the cell type: a maximum modulation order of receiving data, and receiving data. Modulation coding scheme table, maximum modulation order of transmission data, modulation coding scheme table of transmission data, channel quality indication table, downlink control region configuration, table of uplink sounding reference signal configuration parameters, downlink control information format and feedback mode, The sounding reference signal configuration parameter includes a period of the sounding reference signal and a subframe offset.
 The user equipment according to claim 53, wherein the determining module is further configured to determine any one or more of the following information according to the transmission mode of the PDSCH: a maximum modulation order of the received data, a modulation coding scheme table for receiving data, a maximum modulation order of transmission data, a modulation coding scheme table for transmitting data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode The sounding reference signal configuration parameter includes a period of the sounding reference signal and a subframe offset.
The user equipment according to any one of claims 47 to 49, wherein the DMRS indication message received by the receiving module is that the base station passes a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH. Transmitted dynamic signaling, the dynamic signaling includes any one or more of the following information: N-bit signaling, signaling indicating a redundancy version, signaling indicating a modulation and coding scheme, indicating an antenna port number, and a scrambling code Sequence and layer number signaling, new data refers to Signaling, the N is a natural number;
 The determining module is specifically configured to determine a DMRS pattern of the DMRS antenna port according to the dynamic signaling received by the receiving module.
 The user equipment according to any one of claims 47 to 49, wherein the DMRS indication message received by the receiving module is downlink control information sent by the base station through a physical downlink control channel;
 The determining module is specifically configured to determine, according to the downlink control information received by the receiving module, a subframe number of a subframe in which the downlink control information is located, or according to the downlink control information received by the receiving module, Determining a subframe number of the subframe indicated by the downlink control information; and determining a DMRS pattern of the DMRS antenna port according to the subframe number.
 The user equipment according to claim 58, wherein the determining module is specifically configured to:
 Determining, if the difference between the subframe number of the subframe in which the current downlink control information is located and the subframe number of the subframe in which the previous downlink control information is located is greater than a preset value of the first number difference, determining the time-frequency resource in which the DMRS exists The location is the subframe in which the current downlink control information is located; or
 Determining, if the difference between the subframe number of the subframe indicated by the current downlink control information and the subframe number of the subframe in which the previous downlink control information is located is greater than a preset value of the second number difference, determining the time frequency of the presence of the DMRS The location of the resource is the subframe indicated by the current downlink control information.
 The user equipment according to any one of claims 47 to 59, wherein the time-frequency resource comprises: a resource block pair, a resource block group, a half subframe, a subframe, a subframe group, or a subframe group. The resource block group on.
 The user equipment according to any one of claims 47 to 60, wherein all of the M time-frequency resources are allocated to the resource blocks of the user equipment using the same pre-coding, and the M is Natural number.
 The user equipment according to any one of claims 47 to 61, further comprising:
a first processing module, configured to acquire, according to the DMRS pattern determined by the determining module, a mapping relationship between a PDSCH and/or an EPDCCH and a resource element; acquiring the PDSCH and/or an EPDCCH according to the mapping relationship; Acquiring the DMRS obtained by the module to demodulate the PDSCH and/or EPDCCH; or The first processing module is configured to perform channel quality indication CQI calculation according to the DMRS acquired by the acquiring module.
 The user equipment according to any one of claims 47 to 61, further comprising a second processing module;
 The determining module is further configured to determine an additional DMRS pattern of the DMRS antenna port, where the additional DMRS pattern is a location of a time-frequency resource with zero-power DMRS and/or a resource element occupied by the zero-power DMRS Location in the frequency resource;
 The second processing module is configured to obtain a mapping relationship between the PDSCH and/or the EPDCCH and the resource element according to the DMRS pattern and/or the additional DMRS pattern of the DMRS antenna port determined by the determining module; according to the mapping relationship, Acquiring the PDSCH and/or EPDCCH; demodulating the PDSCH and/or EPDCCH according to the DMRS.
 The user equipment according to claim 63, wherein the determining module is specifically configured to: acquire, by the second processing module, a PDSCH and/ according to a DMRS pattern of the DMRS antenna port and/or an additional DMRS pattern. And determining, by the DMRS indication message, an additional DMRS pattern of the DMRS antenna port according to the mapping relationship between the EPDCCH and the resource element; or, the receiving module is further configured to be used by the second processing module according to the DMRS antenna port Receiving, by the DMRS pattern and/or the additional DMRS pattern, an additional DMRS indication message sent by the base station, before acquiring a mapping relationship between the PDSCH and/or the EPDCCH and the resource element;
 The determining module is specifically configured to determine an additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message.
 The user equipment according to any one of claims 47 to 64, further comprising:
 a selecting module, configured to select at least one DMRS pattern from the DMRS pattern candidate set before the receiving module receives the DMRS indication message sent by the base station;
 a first sending module, configured to send the at least one DMRS pattern selected by the selecting module to the base station by using a high layer signaling or a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH), so that the base station is configured according to the At least one DMRS pattern determines a DMRS pattern of the DMRS antenna port.
The user equipment according to claim 65, wherein the selecting module is specifically configured to: according to the moving speed or downlink channel information of the user equipment or the DMRS of the user equipment Processing capability, selecting the at least one DMRS pattern from the set of DMRS pattern candidates. The user equipment according to claim 65 or 66, wherein the first sending module is specifically configured to send the rank indication and the at least one DMRS pattern together by using the high layer signaling or PUCCH or PUSCH The base station.
 68. The user equipment according to claim 67, further comprising:
 a third processing module, configured to jointly encode the rank indication and the at least one DMRS pattern; the first sending module is specifically configured to pass the jointly encoded rank indication and the at least one DMRS pattern by using the high layer signaling or PUCCH Or the PUSCH is sent to the base station.
 The user equipment according to any one of claims 47 to 64, further comprising:
 a second sending module, configured to: after the receiving module receives the DMRS indication message sent by the base station, report the DMRS processing capability indication information to the base station, so that the base station determines the user according to the DMRS processing capability indication message The number of DMRS patterns that the device can process and/or the DMRS pattern that the user device can process.
 70. A base station, comprising:
 a determining module, configured to determine a DMRS pattern of the DMRS antenna port;
 a sending module, configured to send a DMRS indication message to the user equipment, where the DMRS indication message is used to indicate a DMRS pattern of the DMRS antenna port, where the DMRS pattern is a location of a time-frequency resource in which the DMRS exists and/or the DMRS occupation a location of the resource element in the time-frequency resource, so that the user equipment determines a DMRS pattern of the DMRS antenna port according to the DMRS indication message, and acquires the DMRS according to a DMRS pattern of the DMRS antenna port; And transmitting the DMRS to the user equipment according to the DMRS pattern.
 The base station according to claim 70, wherein the sending module is specifically configured to: send a DMRS indication message to the user equipment, where the one DMRS indication message is used to indicate a DMRS of at least one DMRS antenna port Pattern; or,
 At least two DMRS indication messages are sent to the user equipment, each DMRS indication message being used to indicate a DMRS pattern of a DMRS antenna port.
The base station according to claim 70 or 71, wherein the DMRS indication message sent by the sending module is used to indicate a DMRS pattern of a DMRS antenna port, including the DMRS indication message including a density of a DMRS, a DMRS Interval, DMRS Bitmap encoding and/or location of time-frequency resources without DMRS, density of the DMRS, spacing of DMRS, the bitmap encoding of the DMRS, and/or the location of the time-frequency resource in which the DMRS does not exist is used for Determine the DMRS pattern of the DMRS antenna port.
 The base station according to any one of claims 70 to 72, wherein the sending module is specifically configured to use a system information block, a main message block, a high layer signaling, a medium access control signaling, and a cyclic prefix. The set sequence or the set scrambling code in the cyclic prefix sends cell-specific signaling to the user equipment.
 The base station according to claim 73, wherein the determining module is specifically configured to determine a DMRS pattern of the DMRS antenna port according to the cell type;
 The cell-specific signaling sent by the sending module includes a cell type corresponding to the base station, so that the user equipment determines the cell type according to the cell-specific signaling, and according to the cell Type, determining a DMRS pattern of the DMRS antenna port.
 The base station according to any one of claims 70 to 72, wherein the sending module is specifically configured to send user equipment dedicated signaling to the user equipment by using high layer signaling or medium access control signaling. .
 The base station according to claim 75, wherein the determining module is specifically configured to determine a DMRS pattern of the DMRS antenna port according to a transmission mode of the physical downlink shared channel PDSCH;
 The user equipment-specific signaling sent by the sending module includes a transmission mode of the PDSCH, so that the user equipment determines a transmission mode of the PDSCH according to the user equipment-specific signaling, and according to the Determining a transmission mode of the PDSCH, determining a DMRS pattern of the DMRS antenna port.
 The base station according to claim 73 or 75, wherein the DMRS indication message sent by the sending module is further used to indicate any one or more of the following information: a maximum modulation order of the received data, a modulation coding scheme table for receiving data, a maximum modulation order of transmission data, a modulation coding scheme table for transmitting data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode The sounding reference signal configuration parameter includes a period of the sounding reference signal and a subframe offset.
The base station according to claim 74, wherein the cell type is further configured to determine any one or more of the following information: a maximum modulation order of the received data, and a modulation code of the received data. a scheme table, a maximum modulation order of the transmitted data, a modulation coding scheme table of the transmission data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, the sounding reference The signal configuration parameters include the period and sub-frame offset of the sounding reference signal.
 The base station according to claim 76, wherein the transmission mode of the PDSCH is further used to determine any one or more of the following information: a maximum modulation order of the received data, and a modulation coding scheme table of the received data. a maximum modulation order of the transmitted data, a modulation and coding scheme table for transmitting data, a channel quality indication table, a downlink control region configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, and the sounding reference signal configuration The parameters include the period of the sounding reference signal and the subframe offset.
 The base station according to any one of claims 70 to 72, wherein the sending module is specifically configured to send dynamic signaling to the user equipment by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH. And determining, by the user equipment, the DMRS pattern of the DMRS antenna port according to the dynamic signaling, where the dynamic signaling includes any one or more of the following information: N-bit signaling, a letter indicating a redundancy version And, indicating signaling of the modulation and coding scheme MCS, signaling indicating the number of antenna ports, scrambling code sequence and layer number, and new transmission data indicating signaling, where N is a natural number.
 The base station according to any one of claims 70 to 72, wherein the sending module is configured to send downlink control information to the user equipment by using a physical downlink control channel PDCCH, so that the user equipment is configured according to Determining, by the downlink control information, a subframe number of a subframe in which the downlink control information is located, or determining, by the user equipment, a subframe number of the subframe indicated by the downlink control information according to the downlink control information, And determining, according to the subframe number, a DMRS pattern of the DMRS antenna port.
 The base station according to any one of claims 70 to 81, wherein the time-frequency resource comprises: a resource block pair, a resource block group, a half subframe, a subframe, a subframe group, or a subframe group. Resource block group.
 The base station according to any one of claims 70 to 82, wherein all of the M time-frequency resources are allocated to the resource blocks of the user equipment using the same pre-coding, and the M is a natural number. .
The base station according to any one of claims 70 to 83, further comprising: a first processing module, configured to: after the determining module determines a DMRS pattern of the DMRS antenna port, perform resource mapping of the PDSCH and/or the EPDCCH and the resource element according to the DMRS pattern;
 The sending module is further configured to send the PDSCH and/or the EPDCCH to the user equipment.
 The base station according to any one of claims 70 to 83, further comprising a second processing module;
 The determining module is further configured to determine an additional DMRS pattern of the DMRS antenna port, where the additional DMRS pattern is a location of a time-frequency resource with zero-power DMRS and/or a resource element occupied by the zero-power DMRS Location in the frequency resource;
 The second processing module is configured to perform resource mapping of the PDSCH and/or the EPDCCH and the resource element according to the DMRS pattern and/or the additional DMRS pattern of the DMRS antenna port determined by the determining module;
 The sending module is further configured to send the PDSCH and/or the EPDCCH to the user equipment.
 The base station according to claim 85, wherein the DMRS indication message is further used to indicate an additional DMRS pattern of the DMRS antenna port, so that the user equipment determines the DMRS according to the DMRS indication message. An additional DMRS pattern of the antenna port; or the sending module is further configured to: after the determining module determines the additional DMRS pattern of the DMRS antenna port, send an additional DMRS indication message to the user equipment, the additional DMRS indication message An additional DMRS pattern for indicating the DMRS antenna port to cause the user equipment to determine an additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message.
 The base station according to any one of claims 70 to 86, further comprising: a first receiving module, configured to receive the user equipment before the determining module determines a DMRS pattern of the DMRS antenna port At least one DMRS pattern sent by the high layer signaling or the physical uplink control channel PUCCH or the physical uplink shared channel PUSCH, where the at least one DMRS pattern is selected by the user equipment from the DMRS pattern candidate set;
The determining module is specifically configured to determine a DMRS pattern of the DMRS antenna port according to the at least one DMRS pattern received by the first receiving module. The base station according to claim 87, wherein the at least one DMRS pattern is used by the user equipment according to the moving speed or downlink channel information of the user equipment or the DMRS processing capability of the user equipment. Selected from the DMRS pattern candidate set.
 The base station according to claim 87 or 88, wherein the first receiving module is specifically configured to receive a rank indication sent by the user equipment by using the high layer signaling or a PUCCH or a PUSCH, and the at least one DMRS pattern.
 The base station according to claim 89, wherein the first receiving module is specifically configured to receive a joint coded rank indicator and at least one sent by the user equipment by using the high layer signaling or PUCCH or PUSCH DMRS pattern.
 The base station according to any one of claims 70 to 86, further comprising: a second receiving module, configured to receive the user equipment report before the determining module determines a DMRS pattern of the DMRS antenna port DMRS processing capability indication information;
 The determining module is further configured to determine, according to the DMRS processing capability indication information, a number of DMRS patterns that the user equipment can process and/or a DMRS pattern that the user equipment can process.
 The base station according to any one of claims 70 to 91, further comprising: a third processing module, configured to determine that at least two candidate DMRS patterns of the DMRS antenna port are in the same time-frequency resource If there are overlapping resource elements, the same DMRS is mapped on the resource elements overlapping in the same time-frequency resource according to the at least two candidate DMRS patterns.
PCT/CN2013/070990 2013-01-25 2013-01-25 Demodulation reference signal transmission method, user equipment and base station WO2014113971A1 (en)

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